Cable intermediate joint with waterproof structure
The cable joint, with its rigid fixing and dynamic sealing design, solves the problem of moisture penetration caused by poor sealing, achieving high-efficiency waterproof performance and stable connection, thus ensuring the reliability of the cable system and the quality of communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG GUOLIAN CABLE ACCESSORIES MFG
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional cable joints have poor sealing performance, which can lead to water or moisture penetration, affecting waterproof performance. This can cause problems such as electromagnetic interference, signal attenuation, and equipment corrosion, especially in outdoor or humid environments.
It adopts a rigid fixing structure and dynamic sealing design. The cable is stably connected by squeezing the steel ball by the spring-driven sliding ring. The gap is blocked by an air pump and annular airbag to form a labyrinth seal and block the moisture.
It significantly improves the waterproof performance of cable connections, ensures connection reliability, prevents displacement and loosening, and enhances the stability and communication quality of cable systems.
Smart Images
Figure CN224264673U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable joint technology, and in particular to a cable intermediate joint with a waterproof structure. Background Technology
[0002] A cable joint is a structural component used to connect cable conductors, featuring excellent anti-interference performance and high stability. With the increasing complexity of modern electronic products, traditional direct-connection joints are no longer sufficient to meet the demands for high performance and high reliability. Cable joints, due to their superior functional characteristics, have become an indispensable key component in modern electronic equipment.
[0003] When cable joints are connected, poor sealing can allow moisture or humidity to easily penetrate, affecting their waterproof performance. This phenomenon mainly occurs in cable systems located outdoors or in humid environments. The reason lies in insufficient attention to the selection or installation of sealing materials during design and manufacturing. Particularly in high-humidity environments, the sealing effect of the sealant may not meet expectations, leading to problems such as electromagnetic interference, signal attenuation, and equipment corrosion, resulting in decreased communication quality or even complete malfunction.
[0004] In response to this technical problem, this application proposes a cable intermediate joint with a waterproof structure. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide a cable intermediate joint with a waterproof structure, which significantly enhances the stability of the cable through rigid fixing, effectively prevents displacement and loosening, and ensures reliable connection, so as to solve the technical problems described in the background art.
[0006] This utility model is achieved through the following technical solution:
[0007] A waterproof cable joint includes a connector body, with cable bodies installed on both the left and right ends of the inner wall of the connector body. Fixing heads are fixedly connected to both ends of the connector body. Fixing steel balls are connected to the outer wall of the fixing heads via a compression assembly. A connecting shell is fixedly connected to the outer wall of the top of the connector body. A pressing cover is slidably connected to the outer wall of the connecting shell. An air inlet groove is provided at the top of the pressing cover. An air pump is installed at the bottom of the pressing cover. An annular airbag is connected to the output end of the air pump via a sealing assembly.
[0008] Furthermore, the sealing assembly includes a three-way pipe fixedly connected to the output end of the air pump, with delivery pipes fixedly connected to both ends of the three-way pipe, and the opposite ends of the delivery pipes fixedly connected to the outer wall of the annular airbag, and the outer wall of the annular airbag fixedly connected to the inner wall of the connector body.
[0009] Furthermore, a fixing frame is fixedly connected to the inner wall of the tee pipe, and a closing plate is rotatably connected to both the front and rear ends of the fixing frame.
[0010] Furthermore, springs B are fixedly connected to both the front and rear ends of the closing plate, and the bottom ends of springs B are fixedly connected to the front and rear ends of the fixing frame, respectively.
[0011] Furthermore, each of the annular airbags is fixedly connected to a connecting tube at one end of its bottom side, and an air plug is installed on the inner wall of the bottom end of the connecting tube.
[0012] Furthermore, the extrusion assembly includes a sliding ring slidably connected to the outer wall of the fixed head, and a plurality of extrusion blocks are fixedly connected to the inner wall of the sliding ring.
[0013] Furthermore, a sliding groove shell is fixedly connected to the outer wall of the opposite end of the fixing head, the outer wall of the extrusion block is in close contact with the outer wall of the fixing steel ball, the outer wall of the fixing steel ball is sleeved on the inner wall of the fixing head, and the outer wall of the fixing steel ball is installed on the inner wall of the sliding groove shell.
[0014] Furthermore, each of the sliding rings is fixedly connected to a spring A at one end, and each of the springs A is fixedly connected to the outer wall of the fixed head at one end.
[0015] The beneficial effects of this utility model are as follows:
[0016] 1. In this utility model, pressing the cover triggers the air pump to inflate the three-way pipe. The air pressure opens the closing plate, and the gas is injected into the annular airbag through the delivery pipe, causing it to expand and tightly block the gap between the connector body and the cable body. This design effectively blocks humid air, significantly improves waterproof performance, and ensures that the connection is dry and reliable.
[0017] 2. In this invention, when the cable body is inserted into the connector body, the spring drives the sliding ring to move, pushing the compression block to compress and fix the steel ball, making it tightly press against the outer diameter of the cable. This rigid fixation significantly enhances the stability of the cable, effectively prevents displacement and loosening, and ensures a reliable connection. Attached Figure Description
[0018] Figure 1 This is a perspective view of a cable intermediate joint with a waterproof structure proposed in this utility model.
[0019] Figure 2 This is a half-sectional view of the butt joint body of a cable intermediate joint with a waterproof structure proposed in this utility model.
[0020] Figure 3 This is a half-sectional view of the press cover of a cable intermediate joint with a waterproof structure proposed in this utility model.
[0021] Figure 4This is a half-sectional view of a tee pipe with a waterproof structure for a cable intermediate joint proposed in this utility model.
[0022] In the diagram: 1-Connector body, 2-Cable body, 3-Fixing head, 4-Sliding groove shell, 5-Sliding ring, 6-Connecting shell, 7-Pressing cover, 8-Air inlet groove, 9-Spring A, 10-Extrusion block, 11-Fixing steel ball, 12-Air pump, 13-Spring B, 14-T-connector pipe, 15-Delivery pipe, 16-Annular airbag, 17-Connecting pipe, 18-Air plug, 19-Fixing frame, 20-Closing plate. Detailed Implementation
[0023] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.
[0024] In the description of this application, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0025] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a cable intermediate joint with a waterproof structure, including a connector body 1, cable bodies 2 installed on both the left and right ends of the inner wall of the connector body 1, and a fixing head 3 fixedly connected to both the left and right ends of the connector body 1. The outer wall of the fixing head 3 is connected to a fixing steel ball 11 through an extrusion assembly. The extrusion assembly includes a sliding ring 5 slidably connected to the outer wall of the fixing head 3. A plurality of extrusion blocks 10 are fixedly connected to the inner wall of the sliding ring 5. A sliding groove shell 4 is fixedly connected to the outer wall of the opposite end of the fixing head 3. The outer wall of the extrusion block 10 is close to the outer wall of the fixing steel ball 11. The outer wall of the fixing steel ball 11 is sleeved on the inner wall of the fixing head 3. The outer wall of the fixing steel ball 11 is installed on the inner wall of the sliding groove shell 4. A spring A9 is fixedly connected to the opposite end of the sliding ring 5. The opposite end of the spring A9 is fixedly connected to the outer wall of the fixing head 3.
[0026] Specifically: During the assembly of the cable intermediate joint with multiple waterproof structures, the ends of the cable bodies 2 on both sides are inserted into the inner cavity of the butt joint body 1 made of high-density engineering plastic after the insulation layer is peeled off. When axial alignment is performed, the built-in conical compression spring A9 generates radial elastic force, which drives the 304 stainless steel sliding ring 5 to make axial displacement along the outer surface of the anodized aluminum alloy fixing head 3. This movement is transmitted to the 6 sets of brass extrusion blocks 10 through the 45° inclined groove on the inner side of the sliding ring 5, forcing these extrusion blocks to make centripetal movement along the guide track of the sliding shell 4. During this process, the hemispherical groove at the end of the extrusion block 10 forms a three-dimensional constraint on the 12 hardened stainless steel fixing steel balls 11, so that the steel ball group generates a composite centripetal force, which finally acts uniformly on the outer surface of the semi-conductive shielding layer of the cable body 2 with a pressure of 1.2MPa, forming a mechanical self-locking fixation.
[0027] Reference Figure 3 and Figure 4 A connecting shell 6 is fixedly connected to the outer wall of the top of the connector body 1. A pressing cover 7 is slidably connected to the outer wall of the connecting shell 6. An air inlet groove 8 is opened at the top of the pressing cover 7. An air pump 12 is installed at the bottom of the pressing cover 7. The output end of the air pump 12 is connected to an annular airbag 16 through a sealing assembly. The sealing assembly includes a three-way pipe 14 fixedly connected to the output end of the air pump 12. Both ends of the three-way pipe 14 are fixedly connected to a delivery pipe 15. The opposite ends of the delivery pipe 15 are fixedly connected to the outer wall of the annular airbag 16. The outer wall of the annular airbag 16 is fixedly connected to the inner wall of the connector body 1. A fixing frame 19 is fixedly connected to the inner wall of the three-way pipe 14. A closing plate 20 is rotatably connected to both the front and rear ends of the fixing frame 19. A spring B13 is fixedly connected to both the front and rear ends of the closing plate 20. The bottom ends of the spring B13 are respectively fixedly connected to the front and rear ends of the fixing frame 19. A connecting pipe 17 is fixedly connected to the bottom side of the opposite end of the annular airbag 16. An air plug 18 is installed on the inner wall of the bottom end of the connecting pipe 17.
[0028] Specifically: In the waterproof cable joint system with dynamic sealing function, when the operator presses the engineering plastic press cover 7 with anti-slip texture vertically, the built-in press-type air pump 12 is triggered to work, and the air is delivered through the PTFE sealed pipeline of the three-way valve 14. When the air pressure reaches the threshold of 0.15MPa, the stainless steel spring self-locking closing plate 20 inside the three-way pipe 14 rotates 30° under the push of the air pressure, forming a continuous air passage. Compressed air is injected into the annular airbag 16 through the fluororubber delivery pipe 15 with a pressure resistance of 2.5MPa. The airbag is composed of three layers of composite material: an inner layer of conductive silicone, a middle layer of aramid fiber reinforcement, and an outer layer of UV-resistant EPDM rubber. During inflation, the annular airbag 16 fills the annular gap between the connector body 1 and the cable body 2 with a radial expansion rate of 180%. The micro-tooth structure designed on its surface forms a labyrinth seal with the semi-conductive resistive water layer of the cable. The inflated airbag generates a radial pressure of 0.8 MPa, which reduces the interface contact resistance to below 5 μΩ, achieving both electrical conductivity and physical sealing.
[0029] Working principle: When the two cable bodies 2 are connected to the connector body 1, the spring force of the spring A9 causes the sliding ring 5 to move along the outside of the fixed head 3, thereby causing the pressing block 10 to press the fixing steel ball 11 installed in the sliding groove shell 4, so that the fixing steel ball 11 presses and positions the outer diameter of the cable body 2, thereby completing the rigid fixation of the outer side of the cable body 2 and improving the stability of the cable body 2.
[0030] When the press cover 7 is pressed, the air pump 12 inflates the three-way pipe 14, causing the closing plate 20 at the fixing bracket 19 inside the three-way pipe 14 to open due to the air pressure generated by the air pump 12. This allows the three-way pipe 14 to inflate the annular airbag 16 through the delivery pipe 15, causing the annular airbag 16 to expand and block the gap between the connector body 1 and the cable body 2. This prevents external humid air from entering the connection between the cable bodies 2, improving the waterproof effect of the device. Furthermore, opening the air plug 18 at the connecting pipe 17 allows for air release, making it easier to remove the cable body 2.
[0031] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A cable intermediate joint with a waterproof structure comprising a joint body (1), characterized in that: Cable bodies (2) are installed on both the left and right ends of the inner wall of the connector body (1), and fixing heads (3) are fixedly connected to both the left and right ends of the connector body (1). Fixing steel balls (11) are connected to the outer wall of the fixing head (3) through an extrusion assembly. The top outer wall of the connector body (1) is fixedly connected to a connecting shell (6), and the outer wall of the connecting shell (6) is slidably connected to a pressing cover (7). The top of the pressing cover (7) is provided with an air inlet groove (8). An air pump (12) is installed at the bottom of the press cover (7), and the output end of the air pump (12) is connected to an annular airbag (16) through a sealing assembly.
2. The cable intermediate joint with waterproof structure according to claim 1, characterized in that: The sealing assembly includes a three-way pipe (14) fixedly connected to the output end of the air pump (12), and a delivery pipe (15) fixedly connected to both the left and right ends of the three-way pipe (14). The opposite ends of the delivery pipe (15) are fixedly connected to the outer wall of the annular airbag (16), and the outer wall of the annular airbag (16) is fixedly connected to the inner wall of the connector body (1).
3. The cable intermediate joint with waterproof structure according to claim 2, characterized in that: The inner wall of the three-way pipe (14) is fixedly connected to a fixing frame (19), and both ends of the fixing frame (19) are rotatably connected to a closing plate (20).
4. The cable intermediate joint with waterproof structure according to claim 3, characterized in that: Springs B (13) are fixedly connected to both the front and rear ends of the closed plate (20), and the bottom ends of the springs B (13) are fixedly connected to the front and rear ends of the fixed frame (19).
5. The cable intermediate joint with waterproof structure according to claim 1, characterized in that: Each of the annular airbags (16) has a connecting tube (17) fixedly connected to one of its opposite bottom sides, and an air plug (18) is installed on the inner wall of the bottom end of the connecting tube (17).
6. The cable intermediate joint with waterproof structure according to claim 1, characterized in that: The extrusion assembly includes a sliding ring (5) that is slidably connected to the outer wall of the fixed head (3), and a plurality of extrusion blocks (10) are fixedly connected to the inner wall of the sliding ring (5).
7. The cable intermediate joint with waterproof structure according to claim 6, characterized in that: The outer wall of the opposite end of the fixed head (3) is fixedly connected to the sliding shell (4). The outer wall of the extrusion block (10) is close to the outer wall of the fixed steel ball (11). The outer wall of the fixed steel ball (11) is sleeved on the inner wall of the fixed head (3). The outer wall of the fixed steel ball (11) is installed on the inner wall of the sliding shell (4).
8. The cable intermediate joint with waterproof structure according to claim 6, characterized in that: Each of the sliding rings (5) is fixedly connected to a spring A (9) at one end, and the spring A (9) is fixedly connected to the outer wall of the fixed head (3) at one end.