Cable joint waterproof sealing device for electric power engineering

Abstract

The utility model provides a cable joint waterproof sealing device for electric power engineering, which comprises a connector, a concave part formed at one end of the connector, a connecting hole formed in the middle of the concave part, and a first sealing groove formed in the concave part and on the periphery of the connecting hole, the second sealing groove is formed in the concave part and located on the periphery of the first sealing groove, and the fixing clamping grooves are symmetrically formed in the inner wall of one end of the connector. According to the utility model, through innovative structural design and material selection, the waterproof performance, the dustproof performance, the mechanical stability and the installation convenience of the cable connection part are significantly improved, and the cable connection structure has high practical value and market competitiveness.

Description

Technical Field

[0001] This utility model relates to a waterproof sealing device for cable joints used in power engineering. Background Technology

[0002] In power engineering, waterproof sealing of cable joints is a crucial aspect of ensuring the safe and stable operation of power systems. Cable joints are typically exposed to the outdoors or in humid environments. If the waterproof sealing performance is insufficient, external contaminants such as moisture and dust can easily penetrate the joint, leading to problems such as decreased insulation performance, short circuits, and corrosion. In severe cases, it may even cause fires or power outages, resulting in significant economic losses and safety accidents.

[0003] Traditional methods for waterproofing cable joints often involve rubber sealing rings, heat shrink tubing, or tape wrapping. While these methods can meet waterproofing requirements to some extent, they still have some shortcomings:

[0004] Rubber sealing rings are prone to aging and deformation after long-term use, which leads to a decline in sealing performance. Moreover, the installation requires a high level of skill from the operator, and the sealing effect is greatly affected by human factors.

[0005] Heat shrink tubing: requires heating during installation, is complex to operate, and may shrink unevenly or crack under extreme temperature conditions, affecting the sealing effect.

[0006] Tape wrapping: has limited waterproof performance, and the tape is prone to falling off or losing its adhesiveness after long-term use, making it difficult to meet the waterproof requirements in complex environments.

[0007] Furthermore, with the expansion of power engineering projects and the diversification of cable laying environments, the requirements for waterproof sealing devices for cable joints are becoming increasingly stringent. Existing waterproof sealing technologies are insufficient to meet the demands for high reliability, long service life, and ease of installation and maintenance. Therefore, there is an urgent need for a new type of waterproof sealing device for cable joints that can provide more reliable waterproof protection in complex environments, while simplifying installation and maintenance processes and improving the safety and stability of power systems. Utility Model Content

[0008] This invention provides a waterproof sealing device for cable joints in power engineering, which can effectively solve the above-mentioned problems.

[0009] This utility model is implemented as follows:

[0010] A waterproof sealing device for cable joints in power engineering, comprising:

[0011] The connector includes a recessed portion formed at one end, a connecting hole formed in the middle of the recessed portion, a first sealing groove formed on the recessed portion and around the connecting hole, a second sealing groove formed on the recessed portion and around the first sealing groove, and a fixing groove symmetrically formed on the inner wall of one end of the connector.

[0012] Cable body;

[0013] A sealing structure is provided at both ends of the connector and fixes the cable body; the sealing structure includes a sealing cover, a protrusion at one end of the sealing cover, and a waterproof sealing connector on the protrusion, for sealing the cable body and the connector to improve the waterproofness of the cable body.

[0014] The beneficial effects of this utility model are:

[0015] (1) This utility model achieves efficient sealing, waterproofing and mechanical stability of the cable connection through the coordinated design of the connector, cable body and sealing structure. The recessed part of the connector is provided with a first sealing groove and a second sealing groove, which are closely matched with the first sealing ring and the second sealing ring of the sealing structure to form a double sealing barrier, effectively preventing moisture and dust from seeping into the cable from the connection hole. At the same time, the protruding part of the sealing structure is provided with a first water-absorbing part and a second water-absorbing part, which can quickly absorb the trace amount of moisture that may seep in through the sealing ring, ensuring that the connection part is always dry, significantly improving the waterproof and dustproof performance of the cable, and is suitable for harsh environments such as humid, underwater or dusty environments. The symmetrically arranged fixing slots on the inner wall of the connector are tightly engaged with the snap-fit ​​of the sealing structure through a sawtooth structure. Combined with the elastic pressure provided by the spring, it ensures that the sealing structure and the connector are tightly engaged. The secure connection prevents loosening or detachment due to vibration or external forces, improving the reliability and durability of the connection. The threaded design of the connecting hole and its fit with the plug, along with the locking mechanism of the fixing slot and the locking element, make the installation and disassembly of the sealing structure simple and quick, reducing maintenance costs and time. The integrated design of the sealing cap and the raised part further simplifies the installation steps and improves operational efficiency. The depth of the recess and the design of the boss, the threaded structure of the connecting hole, and the optimized dimensions of the sealing groove and fixing slot ensure the realization of all functions while avoiding a decrease in material strength due to excessive groove or hole depth, ensuring the overall structure of the connector is robust and durable. Furthermore, this invention is applicable to various cable types and environmental conditions; its sealing and waterproof design can cope with complex environments such as high temperature, low temperature, humidity, and corrosion, showing broad application prospects. In summary, through innovative structural design and material selection, the waterproofness, dustproofness, mechanical stability, and installation convenience of the cable connection are significantly improved, giving it high practical value and market competitiveness. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is the front view of this utility model.

[0018] Figure 2 This is a schematic diagram of the connection between the connector and the sealing structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the connector of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the protrusion of this utility model.

[0021] Explanation of icon numbers:

[0022] 10. Connector; 100. Recess; 101. Connecting hole; 102. First sealing groove; 103. Second sealing groove; 104. Fixing slot;

[0023] 20. Cable body;

[0024] 30. Sealing structure; 300. Sealing cap; 3001. Connecting hole; 301. Protrusion; 3010. Groove; 3012. Spring; 3013. Snap-fit ​​part; 3014. Snap-fit ​​tooth; 302. First water-absorbing part; 303. Plug-in connector; 304. First sealing ring; 305. Second sealing ring; 306. Second water-absorbing part. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0026] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Reference Figure 1-4 As shown, a waterproof sealing device for cable joints in power engineering includes...

[0028] The connector 10 has a recess 100 formed at one end, a connecting hole 101 formed in the middle of the recess 100, a first sealing groove 102 formed on the recess 100 and around the connecting hole 101, a second sealing groove 103 formed on the recess 100 and around the first sealing groove 102, and a fixing groove 104 symmetrically formed on the inner wall of one end of the connector 10. Further, the recess 100 is a circular groove with a depth of about 5 mm. The inner wall is sandblasted to form a uniform rough surface to enhance the friction with the sealing structure 30 and to fully accommodate the protrusion 301 of the sealing structure 30, ensuring a tight and stable fit between the protrusion 301 and the recess 100. The connecting hole 101 is a circular through hole with an inner diameter of about 8 mm to ensure that the plug 303 can be smoothly inserted, while leaving a certain gap to accommodate manufacturing tolerances and installation errors. Furthermore, the inner wall of the connecting hole 101 is provided with threads, the thread depth is 0.5mm and the pitch is 1mm, for threaded connection with the plug 303. The thread depth and pitch have been optimized to ensure the strength of the connection and avoid the material strength reduction caused by excessive thread depth. The threaded connection method also facilitates installation and disassembly, improving maintenance convenience.

[0029] Furthermore, both the first sealing groove 102 and the second sealing groove 103 are annular grooves with a V-shaped cross-section. The groove depth is approximately 2 mm and the groove width is approximately 3 mm. The first sealing groove 102 is located at the outer edge of the connecting hole 101. The V-shaped cross-section design allows the sealing rings (304, 305) to be better embedded in the groove, forming a uniform compression force to ensure a sealing effect. The dimensions of 2 mm groove depth and 3 mm groove width have been optimized to accommodate the sealing rings without affecting the structural strength of the connector 10 due to excessive groove depth or width. The groove is approximately 1 mm from the edge of the connecting hole 101, ensuring that the first sealing ring 304 can directly form a sealing barrier against the connecting hole 101, preventing moisture and dust from seeping into the connecting hole 101. The second sealing groove 103 is located at the outer edge of the first sealing groove 102, approximately 2 mm from the edge of the first sealing groove 102, forming a double sealing barrier. Even if the first sealing ring 304 fails, the second sealing ring 305 can still provide effective sealing protection, significantly improving waterproof and dustproof performance.

[0030] Cable body 20; Cable body 20 is a multi-core cable with an outer waterproof insulation layer. The insulation layer is about 1mm thick and made of thermoplastic elastomer (TPE), which has excellent waterproof and abrasion-resistant properties.

[0031] A sealing structure 30 is disposed at both ends of the connector 10 and fixes the cable body 20. The sealing structure 30 includes a sealing cover 300, a connecting hole 3001 formed in the middle of the sealing cover 300 and the protrusion 301, a protrusion 301 disposed at one end of the sealing cover 300, and a waterproof sealing connector disposed on the protrusion 301, for sealing the cable body 20 and the connector 10 to improve the waterproofness of the cable body 20. The sealing cover 300 is a circular cover with an outer diameter of approximately 20 mm and a thickness of approximately 3 mm, so that it can completely cover the end of the connector 10, forming an effective physical barrier to prevent external dust, moisture and other contaminants from entering the connection part; the material is high-strength nylon (PA66), which has excellent impact resistance and weather resistance, and can maintain stable mechanical properties in a temperature range of -40℃ to 120℃, ensuring that the sealing cover 300 will not deform or crack in harsh environments.

[0032] The outer wall of the protrusion 301 is provided with a first water-absorbing part 302, a groove 3010 symmetrically arranged between the protrusion 301 and the first water-absorbing part 302, several springs 3012 disposed inside the groove 3010, a snap-fit ​​member 3013 connected and fixed to the springs 3012, and a snap-fit ​​tooth 3014 disposed on the top of the snap-fit ​​member 3013. The snap-fit ​​tooth 301 has a tooth height of approximately 0.5 mm and a tooth pitch of approximately 1 mm, which allows the snap-fit ​​tooth 3014 to be firmly locked within the fixing groove 104, preventing the sealing structure 30 from accidentally falling off. The dimensions of 0.5 mm tooth height and 1 mm tooth pitch are optimized to ensure the reliability of locking while avoiding installation difficulties caused by excessively high or dense teeth.

[0033] The first absorbent part 302 is about 2mm thick and has a water absorption rate of 200%. The high water absorption rate of the first absorbent part 302 enables it to quickly absorb any water that may seep in, preventing water from entering the interior of the connecting hole 101. Its annular design ensures that the water absorption effect is evenly distributed, avoiding local water accumulation.

[0034] A connector 303 is provided at the center of the end of the protrusion 301. The outer diameter of the connector 303 is smaller than the inner diameter of the connection hole 101. A first sealing ring 304 is provided at the end of the protrusion 301 and around the connector 303. A second water-absorbing part 306 is provided at the end of the protrusion 301 and around the first sealing ring 304. A second sealing ring 305 is provided at the end of the protrusion 301 and around the second water-absorbing part 306. The first sealing ring 304 and the second sealing ring 305 are inserted into the first sealing groove 102 and the second sealing groove 103, thereby sealing the cable body 20. The fixing slot 104 is adapted to the snap-fit ​​member 3013, and the interior of the fixing slot 104 is provided with a snap-fit ​​part (not shown in the figure) that connects with the snap-fit ​​tooth 3014.

[0035] Furthermore, the second absorbent part 306 is an annular absorbent cotton layer with a thickness of approximately 1.5 mm and a water absorption rate of 150%. The high water absorption rate of the second absorbent part 306 enables it to quickly absorb moisture that may seep in through the first sealing ring 304, ensuring that the connection part remains dry at all times. Its annular design ensures that the water absorption effect is evenly distributed, avoiding local water accumulation. At the same time, the end of the second absorbent part 306 fits against the surface of the recess 100, forming an additional waterproof barrier, further enhancing the overall waterproof performance.

[0036] Working principle:

[0037] One end of the connector 10 has a recessed area containing a connection hole 101, a first sealing groove 102, a second sealing groove 103, and a fixing slot 104 for securing the cable. The cable is securely fixed to both ends of the connector 10 via a sealing structure. This sealing structure includes a sealing cap 300 and a protrusion 301. The protrusion 301 is equipped with a waterproof seal to ensure a tight connection between the cable and the connector 10, thereby improving the overall waterproof performance. On the outer wall of the protrusion 301, there is a first absorbent part 302 and a groove 3010. The groove 3010 contains a spring 3012 and a snap-fit ​​member 3013. The top of the snap-fit ​​member 3013 has a snap tooth 3014 to enhance the stability of the connection. At the center of the end of the protrusion 301, there is a plug 303, surrounded by a first sealing ring 304, a second sealing ring 305, and a second absorbent part 306. The second sealing ring 305 is inserted into the first sealing groove 102 and the second sealing groove 103 of the connector 10 to ensure a complete seal at the connection and prevent moisture infiltration. The second absorbent part 306 fits tightly against the surface of the connector 10 to further enhance the waterproof effect. The fixing groove 104 perfectly matches the snap-fit ​​part 3013. The fixing groove 104 has a snap-fit ​​part that connects with the snap-fit ​​teeth 3014 to ensure a firm fixation between the connector 10 and the cable. A connecting hole 3001 is designed in the middle of the sealing cap 300 and the protrusion 301. The outer diameter of the plug 303 is slightly smaller than the inner diameter of the connecting hole 101, which ensures that the connection is tight but not too tight. In summary, through multiple sealing and fixing mechanisms, not only is the waterproofness of the cable connection ensured, but also the stability and durability of the connection. This design allows the cable to maintain reliable performance in various environments.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waterproof sealing device for cable joints used in power engineering, characterized in that, include A connector (10) has a recess (100) formed at one end of the connector (10), a connecting hole (101) formed in the middle of the recess (100), a first sealing groove (102) formed on the recess (100) and around the connecting hole (101), a second sealing groove (103) formed on the recess (100) and around the first sealing groove (102), and a fixing groove (104) symmetrically formed on the inner wall of one end of the connector (10). Cable body (20); A sealing structure (30) is provided at both ends of the connector (10) and fixes the cable body (20); the sealing structure (30) includes a sealing cover (300), a protrusion (301) provided at one end of the sealing cover (300), and a waterproof sealing connector provided on the protrusion (301) for sealing the cable body (20) and the connector (10) to improve the waterproofness of the cable body (20).

2. The waterproof sealing device for cable joints in power engineering according to claim 1, characterized in that, The outer wall of the protrusion (301) is provided with a first water-absorbing part (302), a groove (3010) symmetrically arranged between the protrusion (301) and the first water-absorbing part (302), a plurality of springs (3012) arranged inside the groove (3010), a snap-fit ​​member (3013) connected and fixed to the springs (3012), and a snap-fit ​​tooth (3014) arranged on the top of the snap-fit ​​member (3013).

3. The waterproof sealing device for cable joints in power engineering according to claim 1, characterized in that, A connector (303) is provided at the center of the end of the protrusion (301), a first sealing ring (304) is provided at the end of the protrusion (301) and on the outer periphery of the connector (303), a second water-absorbing part (306) is provided at the end of the protrusion (301) and on the outer periphery of the first sealing ring (304), and a second sealing ring (305) is provided at the end of the protrusion (301) and on the outer periphery of the second water-absorbing part (306).

4. A waterproof sealing device for cable joints in power engineering according to claim 3, characterized in that, The first sealing ring (304) and the second sealing ring (305) are inserted into the first sealing groove (102) and the second sealing groove (103) to seal the cable body (20).

5. A waterproof sealing device for cable joints in power engineering according to claim 3, characterized in that, The end of the second absorbent part (306) is attached to the surface of the recessed part (100) to achieve a waterproof adsorption effect.

6. A waterproof sealing device for cable joints in power engineering according to claim 2, characterized in that, The fixed slot (104) is adapted to the snap-fit ​​member (3013), and the fixed slot (104) is provided with a snap-fit ​​part that is connected to the snap-fit ​​tooth (3014).

7. A waterproof sealing device for cable joints in power engineering according to claim 1, characterized in that, A connecting hole (3001) is formed in the middle of the sealing cap (300) and the protrusion (301).

8. A waterproof sealing device for cable joints in power engineering according to claim 3, characterized in that, The outer diameter of the connector (303) is smaller than the inner diameter of the connecting hole (101).

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