Space-saving screw split seal joint tooling
By using the detachable connection between the positioning seat and the connecting sleeve and the protrusion insertion structure, combined with the threaded connection and sealing ring design, the installation interference problem of the sealing joint in a confined space is solved, achieving convenient installation, stable connection and efficient sealing, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUZHOU HANFEI AEROSPACE TECH DEV CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-24
AI Technical Summary
Existing sealing joints are too large to fit in confined or compact spaces, causing installation interference and failing to meet spatial constraints. Furthermore, traditional flanges have complex structures and high maintenance costs.
The tooling employs a detachable connection between the positioning seat and the connecting sleeve, a multi-insertion structure of the protrusion and the insertion tube, combined with threaded connection and sealing ring design, to achieve a segmented sealing joint tooling, reducing the overall outer contour size and facilitating disassembly and installation.
It saves installation space, improves installation flexibility and versatility, reduces maintenance costs, enhances connection stability and sealing performance, prevents media leakage, and adapts to the needs of limited space.
Smart Images

Figure CN224550998U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline connection technology, specifically a space-saving screw-type split sealing joint tooling. Background Technology
[0002] In scenarios such as industrial equipment connection, pipeline testing, and precision instrument assembly, sealing joints are key tooling for achieving reliable connection and sealing between components. Their performance directly affects the operational safety and stability of the system. Especially in some confined space environments, such as pipeline docking inside narrow cavities and interface testing in compact equipment cabins, extremely stringent restrictions are placed on the outer contour dimensions of the joints.
[0003] Currently, existing sealing joints typically use an integral flange with full-circumference screws for fastening. To ensure sufficient connection strength and sealing effect, the flange diameter often needs to be designed according to the screw arrangement space, resulting in a large overall joint size. An excessively large joint diameter can cause installation interference and cannot adapt to space constraints. Therefore, we need to propose a space-saving screw-segmented sealing joint tooling. Utility Model Content
[0004] The purpose of this utility model is to provide a space-saving screw-type split sealing joint tooling. By setting a detachable connection between the positioning seat and the connecting sleeve, and a multi-insertion structure of the protrusion and the insertion tube, it achieves the effect of saving installation space and facilitating installation and disassembly, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A space-saving screw-type split sealing joint tooling includes: a positioning seat, in which a first connecting tube is inserted, and a connecting sleeve is detachably connected to the outer wall of the positioning seat, and one end of the connecting sleeve is fixedly connected to a second connecting tube.
[0007] A protrusion is fixedly connected to one end of the first connecting tube. The protrusion is inserted into the inner cavity of the positioning seat. A tube is fixedly connected to one side wall of the protrusion and is inserted into the inside of the connecting sleeve.
[0008] Preferably, one side of the protrusion abuts against one end of the positioning seat, and the diameter of the protrusion is the same as the diameter of the positioning seat.
[0009] Preferably, a sealing ring is provided on one side of the protrusion, and a sealing groove adapted to the sealing ring is provided inside the connecting sleeve, and the sealing ring is snapped into the inside of the sealing groove.
[0010] Preferably, the connecting sleeve has a stepped groove inside that matches the protrusion, and one side of the inner wall of the stepped groove abuts against one side of the protrusion.
[0011] Preferably, the connecting sleeve has a slot inside that is compatible with the insertion tube, and the insertion tube is inserted into the slot.
[0012] Preferably, the outer wall of the positioning seat is provided with an external thread, and the inside of the connecting sleeve is provided with an internal thread that matches the external thread. The connecting sleeve is threadedly connected to the outer wall of the positioning seat.
[0013] Preferably, both the positioning seat and the connecting sleeve are fixedly connected to a connecting block, and the two sets of connecting blocks are arranged in a hexagonal shape.
[0014] Preferably, the outer walls of the positioning seat, connecting sleeve, protrusion and insertion tube are all galvanized for rust prevention, and the surface roughness is no greater than Ra1.6μm.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This utility model abandons the full-circumference structure of the traditional integral flange. Through the insertion and matching of the positioning seat and the connecting sleeve, as well as the compact design of the protrusion and the insertion tube, the overall outer contour size of the joint is greatly reduced. There is no need to reserve full-circumference space for the screw arrangement, which effectively avoids the installation interference problem in limited spaces such as narrow cavities and compact equipment compartments. It can flexibly adapt to scenarios with strict space constraints. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the positioning seat, the first connecting pipe, and the connecting sleeve of this utility model;
[0019] Figure 3 This is a cross-sectional structural diagram of the positioning seat and the first connecting pipe of this utility model;
[0020] Figure 4 This is a cross-sectional structural diagram of the connecting sleeve of this utility model.
[0021] In the diagram: 1. Positioning seat; 2. First connecting pipe; 3. Connecting sleeve; 4. Second connecting pipe; 5. Protrusion; 6. Insertion tube; 7. Sealing groove; 8. Step groove; 9. Slot; 10. External thread; 11. Internal thread; 12. Connecting block; 13. Sealing ring. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figure 1-4 This utility model provides a technical solution:
[0024] A space-saving screw-type split sealing joint tooling includes: a positioning seat 1, in which a first connecting pipe 2 is inserted; a connecting sleeve 3 is detachably connected to the outer wall of the positioning seat 1; and a second connecting pipe 4 is fixedly connected to one end of the connecting sleeve 3. By setting the detachable connection between the positioning seat 1 and the connecting sleeve 3, and the corresponding connection between the first connecting pipe 2 and the second connecting pipe 4, the effect of facilitating component disassembly and replacement and realizing pipeline docking is achieved.
[0025] In practical applications, when a component is damaged, such as the first connecting pipe 2 becoming worn due to long-term use or the second connecting pipe 4 deforming due to external impact, the damaged component can be easily and quickly disassembled and replaced without discarding the entire fitting, greatly reducing maintenance costs. Simultaneously, this structure facilitates the connection of different pipelines. For example, in industrial piping systems, when connecting pipelines of different specifications or with different directions, simply selecting the appropriate first connecting pipe 2 and second connecting pipe 4, and connecting them via the positioning seat 1 and connecting sleeve 3, easily completes the pipeline connection. This improves the installation flexibility and versatility of the piping system, achieving the effect of facilitating component disassembly and replacement and pipeline connection.
[0026] The protrusion 5 is fixedly connected to one end of the first connecting tube 2. The protrusion 5 is inserted into the inner cavity of the positioning seat 1. A tube 6 is fixedly connected to one side wall of the protrusion 5. The outer walls of the positioning seat 1, the connecting sleeve 3, the protrusion 5 and the tube 6 are all galvanized for rust prevention, and the surface roughness is no greater than Ra1.6μm. The tube 6 is inserted into the inside of the connecting sleeve 3. When the joint tooling is subjected to external force, the insertion of the protrusion 5 into the inner cavity of the positioning seat 1 can withstand part of the axial force and prevent the first connecting tube 2 from coming out of the positioning seat 1. The insertion of the tube 6 into the inside of the connecting sleeve 3 can withstand part of the radial force and prevent the first connecting tube 2 from shaking inside the connecting sleeve 3. This dual-plug structure works together to enhance the connection stability between the first connecting pipe 2, the positioning seat 1, and the connecting sleeve 3 from different directions. This allows the joint tooling to maintain a reliable connection even under complex working conditions, reducing the probability of failures such as media leakage caused by loose connections. This achieves the effect of enhancing the connection stability between the first connecting pipe 2, the positioning seat 1, and the connecting sleeve 3.
[0027] One side of the protrusion 5 abuts against one end of the positioning seat 1, and the diameter of the protrusion 5 is the same as the diameter of the positioning seat 1. By setting the abutment fit between the protrusion 5 and the positioning seat 1 and the equal diameter design, the connection surfaces of the two are smoothly transitioned after the joint fixture is installed, without any protrusions or depressions caused by abrupt changes in size. In confined space environments, such as small equipment compartments or compact piping systems, this smooth connection surface effectively avoids interference with other surrounding components, saving valuable space resources. At the same time, the smooth connection surface also improves the overall aesthetics and installation quality of the joint fixture, making the layout of the piping system more rational and standardized, achieving the effect of ensuring a smooth transition between the two connection surfaces and avoiding increased space occupation due to abrupt changes in size.
[0028] A sealing ring 13 is provided on one side of the protrusion 5, and a sealing groove 7 adapted to the sealing ring 13 is provided inside the connecting sleeve 3. The sealing ring 13 is snapped into the sealing groove 7. Through the cooperation between the sealing ring 13 and the sealing groove 7, after the joint fixture is connected, the sealing ring 13 is compressed and elastically deformed in the sealing groove 7, filling the tiny gap between the protrusion 5 and the connecting sleeve 3, forming a reliable sealing barrier. Whether in a pipeline system transporting gas or liquid, it can effectively prevent the medium from leaking from the connection, ensuring the normal operation and safety of the system. Moreover, this sealing structure is simple and reliable, easy to install, and does not require complex sealing processes and equipment, reducing sealing costs and achieving the effect of enhancing the sealing performance of the joint and preventing medium leakage.
[0029] The connecting sleeve 3 has a stepped groove 8 inside that matches the protrusion 5. One side of the inner wall of the stepped groove 8 abuts against one side of the protrusion 5. By setting the stepped groove 8 to abut against the protrusion 5, the stepped groove 8 can accurately axially position the protrusion 5 during the process of inserting the first connecting pipe 2 into the positioning seat 1 and the connecting sleeve 3, preventing it from being over-inserted into the connecting sleeve 3. When the protrusion 5 abuts against one side of the inner wall of the stepped groove 8, the operator can clearly feel that the first connecting pipe 2 has been installed in place, avoiding problems such as loose connection or damage to components due to improper insertion depth. At the same time, the abutting action of the stepped groove 8 can also withstand axial force to a certain extent, enhancing the overall structural strength of the joint tooling, and achieving the effect of axially limiting the protrusion 5 and preventing it from being over-inserted into the connecting sleeve 3.
[0030] The connecting sleeve 3 has a pre-drilled slot 9 that matches the insert 6. The insert 6 is inserted into the slot 9. By precisely connecting the slot 9 and the insert 6, the slot 9 provides accurate guidance for the insert 6 during assembly, allowing the first connecting tube 2 to quickly and accurately align with the connecting sleeve 3. Especially in applications requiring high assembly precision, such as pipeline connections in precision instruments, this precise connection structure ensures the positional accuracy of each component and reduces connection problems caused by assembly errors. Simultaneously, the precise connection improves the sealing performance of the joint fixture. When the insert 6 is accurately inserted into the slot 9, the fit between the two is tighter, effectively preventing media leakage from the connection point. This further guides the first connecting tube 2 to align with the connecting sleeve 3, improving assembly precision.
[0031] The outer wall of the positioning seat 1 is provided with an external thread 10, and the inner wall of the connecting sleeve 3 is provided with an internal thread 11 that matches the external thread 10. The connecting sleeve 3 is threadedly connected to the outer wall of the positioning seat 1. By setting the threaded connection structure of the external thread 10 and the internal thread 11, when installing and disassembling the joint tooling, it is only necessary to rotate the connecting sleeve 3 to achieve the connection and separation with the positioning seat 1, which is simple and convenient. Moreover, the threaded connection has good self-locking performance, which can ensure that the connection between the positioning seat 1 and the connecting sleeve 3 is tight after the connection is completed, and it is not easy to loosen. Even under the action of external force or vibration environment, it can maintain a reliable connection state and ensure the normal operation of the joint tooling. In addition, the threaded connection structure also has a certain sealing performance, which can prevent the medium from leaking from the connection, achieving the effect of detachable connection and tight connection between the positioning seat 1 and the connecting sleeve 3.
[0032] Both the positioning seat 1 and the connecting sleeve 3 are fixedly connected to connecting blocks 12. The two sets of connecting blocks 12 are hexagonal. By using hexagonal connecting blocks 12, operators can easily connect and disconnect the positioning seat 1 and the connecting sleeve 3 by using common tools such as wrenches, locking the wrench opening onto the hexagonal connecting block 12 and rotating the wrench. Compared to some specially shaped connection structures, the hexagonal connecting block 12 is more versatile, requiring no special tools and improving work efficiency. At the same time, the hexagonal connecting block 12 has high structural strength and can withstand large torques, ensuring that it will not be damaged due to excessive force during installation and removal, guaranteeing the normal use of the connecting fixture, and achieving the effect of facilitating installation and removal operations with wrenches and other tools, thus improving work efficiency.
[0033] Working principle: When the space screw split sealing joint tooling is in operation, the first connecting pipe 2 is first inserted into the positioning seat 1, so that the protrusion 5 is inserted into the inner cavity of the positioning seat 1. At the same time, the insertion pipe 6 is aligned with the slot 9 of the connecting sleeve 3 and inserted. At this time, the sealing ring 13 on one side of the protrusion 5 is inserted into the sealing groove 7 of the connecting sleeve 3. Then, the external thread 10 on the outer wall of the positioning seat 1 is threadedly connected to the internal thread 11 inside the connecting sleeve 3. During the tightening process, the inner wall of the stepped groove 8 abuts against the protrusion 5 to achieve axial limit. The hexagonal connecting block 12 is easy to tighten with tools. Through the coordinated cooperation of various components, the pipeline is finally tightly connected and reliably sealed. Moreover, the whole structure saves space and is suitable for installation requirements in limited spaces.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A space-saving screw-type split sealing joint tooling, characterized in that, include: The positioning seat (1) has a first connecting tube (2) inserted inside it. A connecting sleeve (3) is detachably connected to the outer wall of the positioning seat (1). One end of the connecting sleeve (3) is fixedly connected to a second connecting tube (4). A protrusion (5) is fixedly connected to one end of the first connecting tube (2). The protrusion (5) is inserted into the inner cavity of the positioning seat (1). A tube (6) is fixedly connected to one side wall of the protrusion (5). The tube (6) is inserted into the inside of the connecting sleeve (3).
2. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: One side of the protrusion (5) abuts against one end of the positioning seat (1), and the diameter of the protrusion (5) is the same as the diameter of the positioning seat (1).
3. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: A sealing ring (13) is provided on one side of the protrusion (5), and a sealing groove (7) adapted to the sealing ring (13) is provided inside the connecting sleeve (3), and the sealing ring (13) is snapped into the inside of the sealing groove (7).
4. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: The connecting sleeve (3) has a stepped groove (8) inside that is adapted to the protrusion (5), and the inner wall of one side of the stepped groove (8) abuts against one side of the protrusion (5).
5. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: The connecting sleeve (3) has a slot (9) inside that is compatible with the insertion tube (6), and the insertion tube (6) is inserted into the slot (9).
6. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: The outer wall of the positioning seat (1) is provided with an external thread (10), and the inside of the connecting sleeve (3) is provided with an internal thread (11) that matches the external thread (10). The connecting sleeve (3) is threadedly connected to the outer wall of the positioning seat (1).
7. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: Both the positioning seat (1) and the connecting sleeve (3) are fixedly connected with connecting blocks (12), and the two sets of connecting blocks (12) are arranged in a hexagonal shape.
8. The space-saving screw-type split sealing joint tooling according to claim 1, characterized in that: The outer walls of the positioning seat (1), connecting sleeve (3), protrusion (5) and insertion tube (6) are all galvanized for rust prevention, and the surface roughness is no greater than Ra1.6μm.