Waterproof large eight-core current watertight plug
Through integrated sealing components and foolproof structural design, the problems of traditional watertight plugs in terms of waterproof performance, connection stability and environmental adaptability are solved, and stable current transmission and safe operation of equipment are achieved in complex underwater environments and temperature changes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING HISILICON TECHNOLOGY CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional watertight plugs are inadequate in terms of waterproof performance, connection stability, and environmental adaptability. In particular, they are prone to problems such as sealing failure, loose connection, and misinsertion in complex underwater environments and temperature changes, which affect the stable operation and safety of equipment.
It adopts an integrated sealing component design, including a stepped sealing ring and an elastic sealing gasket, combined with a shape memory alloy sleeve and barbed claws, equipped with a foolproof structure and an inclined conductive core to enhance sealing and connection stability, and drains accumulated water through spiral guide grooves and drainage micropores. The design includes foolproof bumps and wedge-shaped sealing lips to improve operational accuracy and durability.
It achieves excellent waterproof performance in high-pressure underwater environments, ensures connection stability and continuous current transmission, reduces the risk of failure due to temperature changes and equipment vibration, and improves operational accuracy and equipment reliability.
Smart Images
Figure CN224384644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of watertight plug technology, and in particular to a waterproof eight-core current watertight plug. Background Technology
[0002] In many industrial sectors, especially in marine exploration, underwater operations, and outdoor high-humidity environments, watertight connectors are critical connection components, and their performance directly affects the stable operation and safety of the equipment. Traditional watertight connectors have revealed a series of problems in practical applications.
[0003] In terms of waterproofing, common watertight plugs have relatively simple sealing structures, relying solely on a single sealing ring for waterproofing. Under complex underwater pressure environments or prolonged immersion, water can easily seep into the plug through the seal gaps, causing short circuits in the conductive core and severely affecting the normal operation of the equipment. For example, some watertight plugs used in marine monitoring buoys experience seal failure after a period of use due to seawater erosion and water pressure, resulting in interrupted monitoring data transmission and preventing the provision of continuous and effective data support for scientific research.
[0004] Regarding connection stability, the connection between the conductive core and cable of traditional plugs is not robust enough. When the equipment is subjected to vibration or pulling, poor contact or even open circuits can easily occur. Taking the power plug of an underwater robot as an example, during the robot's operation, frequent movements cause the cable to sway, and the connection point between the core and cable of a regular plug is prone to loosening, resulting in unstable power supply to the robot and affecting operational efficiency and safety. Moreover, traditional eight-pin plugs lack effective foolproof design when plugged in. If an operator accidentally plugs it in, it can not only damage the plug and socket but also cause equipment malfunctions, resulting in economic losses.
[0005] Furthermore, traditional plugs have poor adaptability to temperature changes. When the ambient temperature fluctuates significantly, the internal materials of the plug deform due to thermal expansion and contraction, damaging the original sealing and connection structure. In outdoor electrical equipment in some cold regions, low winter temperatures cause the plug's sealing material to harden and shrink, significantly reducing its waterproof performance; high summer temperatures may increase the core resistance, affecting current transmission efficiency. In conclusion, there is an urgent practical need to develop a new type of watertight plug with excellent waterproof performance, stable and reliable connection, and adaptability to various environments. Utility Model Content
[0006] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a waterproof eight-core current-tight plug.
[0007] One of the objectives of this utility model is achieved through the following technical solution:
[0008] A waterproof eight-pin current-tight plug, comprising:
[0009] The plug housing has an eight-pin connector at the front and a cable connection at the rear.
[0010] Eight conductive cores are uniformly embedded in the eight-core connector in a ring. The front end of each core is a conductive contact, and the rear end is fixed to the external cable by a sealing sleeve.
[0011] An integrated sealing assembly includes a stepped sealing ring disposed on the outer periphery of the plug housing and an elastic sealing gasket filling the gap of the eight-pin connector, wherein the stepped sealing ring forms at least two sealing lips along the axial direction.
[0012] Furthermore, the inner wall of the eight-pin connector is provided with a spiral guide groove, and the end of the spiral guide groove is connected to the drainage micro-hole at the bottom of the housing.
[0013] Furthermore, the conductive core is surrounded by a shape memory alloy sleeve, which shrinks and presses tightly against the sealing sleeve when the temperature is above 60°C.
[0014] Furthermore, the cable connection part is provided with a rotatable locking ring, and the inner side of the locking ring is provided with barbed claws. When tightened, the claws are embedded in the outer sheath of the outer cable.
[0015] Furthermore, the edge of the eight-pin connector is provided with a triangular anti-fooling protrusion, and the corresponding socket end is provided with a matching anti-fooling groove. The anti-fooling protrusion forms a 15° angle with the line connecting any two adjacent conductive cores.
[0016] Furthermore, the stepped sealing ring is made of hydrogenated nitrile rubber, and its sealing lip has a wedge-shaped cross-section, with an oil reservoir formed between adjacent sealing lips.
[0017] Furthermore, the axis of the conductive core is inclined at 5° to the axis of the plug housing, and the inclination directions of adjacent conductive cores are opposite.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] 1. This utility model's waterproof eight-pin current-tight plug exhibits superior waterproof performance through a unique integrated sealing component design. The stepped sealing ring on the outer periphery forms at least two sealing lips. This multi-layer sealing structure greatly extends the water penetration path, effectively preventing moisture intrusion even in high-pressure underwater environments. The elastic sealing gasket filling the gaps in the eight-pin connector further ensures the waterproof seal of the plug, guaranteeing stable operation of the plug in humid or even underwater environments from multiple perspectives, and preventing malfunctions such as short circuits caused by water ingress.
[0020] 2. The triangular anti-foolproof protrusions on the edge of the eight-pin connector, together with the matching grooves on the corresponding socket end, form a reliable anti-foolproof structure. Furthermore, the special design of the anti-foolproof protrusions forming a 15° angle with the connecting line between any two adjacent conductive cores allows operators to quickly and accurately identify the direction during insertion, preventing misinsertion. This protects both the plug and socket, ensures normal equipment operation, and reduces the risk of equipment damage due to misoperation.
[0021] 3. The shape memory alloy sleeve covering the conductive core gives the plug excellent temperature adaptability. When the ambient temperature is higher than 60℃, the shape memory alloy sleeve shrinks and presses tightly against the sealing sleeve. On the one hand, this strengthens the sealing performance at the connection between the core and the cable, preventing sealing failure caused by softening of the sealing material due to temperature rise. On the other hand, the tight connection also ensures the stability of current transmission, avoiding problems such as increased resistance and overheating caused by loose connection, thus improving the reliability of the plug in temperature-changing environments.
[0022] 4. The inner side of the rotatable locking ring of the cable connection part is equipped with barbed claws. When tightened, the claws are embedded in the outer sheath of the external cable. This design can firmly fix the cable and prevent the connection from loosening due to cable shaking or pulling during equipment operation, ensuring continuous and stable power transmission. It is suitable for various equipment with high requirements for cable connection stability.
[0023] 5. The spiral guide groove on the inner wall of the eight-pin connector and the bottom drainage micro-hole work together to guide water out along the spiral guide groove when there is a small amount of water inside the plug, avoiding water accumulation that affects conductivity, effectively reducing the risk of electrical failure caused by humid environments, and further improving the plug's moisture resistance in harsh environments.
[0024] 6. The design of setting the axis of the conductive core at a 5° angle to the axis of the plug housing and the opposite tilt direction of adjacent conductive cores increases the spacing between conductive contacts, reduces electromagnetic interference, optimizes the current transmission path, reduces contact resistance, and improves current transmission efficiency, enabling the plug to better meet the needs of high current transmission.
[0025] 7. The stepped sealing ring is made of hydrogenated nitrile rubber. Its sealing lip has a wedge-shaped cross section and an oil reservoir is formed between adjacent sealing lips. Hydrogenated nitrile rubber has excellent oil resistance, corrosion resistance and wear resistance. The wedge-shaped sealing lip design can provide a better sealing effect when compressed. The oil reservoir can store lubricating grease, reduce friction between the sealing ring and the socket, extend the service life of the sealing ring, and thus improve the overall durability and reliability of the plug.
[0026] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of this embodiment;
[0028] Figure 2 This is a schematic diagram of the conductive core structure of the component in this embodiment;
[0029] Figure 3 This is a schematic diagram of the elastic sealing gasket structure of the component in this embodiment;
[0030] Figure 4 This is a schematic diagram of the sealing sleeve structure of the component in this embodiment;
[0031] Figure 5 This is a schematic diagram of the oil storage tank structure of the component in this embodiment;
[0032] Figure 6 This is a schematic diagram of the anti-foolproof bump structure of the component in this embodiment.
[0033] In the diagram: 1. Plug body; 11. Plug end; 12. Fixed end; 13. Spiral guide groove; 14. Drainage micro-hole; 2. Conductive core; 21. Conductive contact; 3. Sealing sleeve; 4. External cable; 5. Integrated sealing assembly; 51. Stepped sealing ring; 52. Elastic sealing gasket; 511. Sealing lip; 512. Oil reservoir; 6. Shape memory alloy sleeve; 7. Locking ring; 71. Claw; 8. Anti-fooling protrusion. Detailed Implementation
[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0035] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0037] Please see Figures 1 to 6 The waterproof eight-core current watertight plug of this embodiment includes: a plug housing 1, with an eight-core plug portion 11 at the front end and a cable connection portion 12 at the rear end; eight conductive cores 2, which are uniformly embedded in the eight-core plug portion 11 in a ring, with conductive contacts 21 at the front end and fixed to an external cable 4 at the rear end by a sealing sleeve 3.
[0038] The integrated sealing assembly 5 includes a stepped sealing ring 51 disposed on the outer periphery of the plug housing 1 and an elastic sealing gasket 52 filling the gap of the eight-core plug portion 11. The stepped sealing ring 51 forms at least two sealing lips 511 along the axial direction.
[0039] The inner wall of the eight-pin connector 11 is provided with a spiral guide groove 13, and the end of the spiral guide groove 13 is connected to the drainage microhole 14 at the bottom of the housing.
[0040] The conductive core 2 is surrounded by a shape memory alloy sleeve 6. When the temperature is above 60°C, the shape memory alloy sleeve 6 shrinks and presses tightly against the sealing sleeve 3.
[0041] The cable connection part 12 is provided with a rotatable locking ring 7, and the inner side of the locking ring 7 is provided with a barbed claw 71. When tightened, the claw 71 is embedded in the outer sheath of the outer cable 4.
[0042] The edge of the eight-pin connector 11 is provided with a triangular anti-fooling protrusion 8, and the corresponding socket end is provided with a matching anti-fooling groove. The anti-fooling protrusion 8 forms a 15° angle with the line connecting any two adjacent conductive cores 2.
[0043] The stepped sealing ring 51 is made of hydrogenated nitrile rubber, and its sealing lip 511 has a wedge-shaped cross section, with an oil reservoir 512 formed between adjacent sealing lips 511.
[0044] The axis of the conductive core 2 is inclined at 5° to the axis of the plug housing 1, and the inclination directions of adjacent conductive cores 2 are opposite.
[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting 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 waterproof eight-pin current-tight plug, characterized in that, include: The plug housing (1) has an eight-pin plug part (11) at the front end and a cable connection part (12) at the rear end; Eight conductive cores (2) are uniformly embedded in the eight-core plug-in part (11) in a ring. The front end of each core is a conductive contact (21), and the rear end is fixed to the external cable (4) through a sealing sleeve (3). The integrated sealing assembly (5) includes a stepped sealing ring (51) disposed on the outer periphery of the plug housing (1) and an elastic sealing gasket (52) filling the gap of the eight-pin plug portion (11), wherein the stepped sealing ring (51) forms at least two sealing lips (511) along the axial direction.
2. The waterproof eight-pin current-tight plug according to claim 1, characterized in that, The inner wall of the eight-core connector (11) is provided with a spiral guide groove (13), and the end of the spiral guide groove (13) is connected to the drainage microhole (14) at the bottom of the shell.
3. The waterproof eight-core current-tight plug according to claim 1, characterized in that, The conductive core (2) is covered with a shape memory alloy sleeve (6) on its outer periphery. The shape memory alloy sleeve (6) shrinks and presses tightly against the sealing sleeve (3) when the temperature is above 60°C.
4. The waterproof eight-core current-tight plug according to claim 1, characterized in that, The cable connection part (12) is provided with a rotatable locking ring (7), and the inner side of the locking ring (7) is provided with a barbed claw (71). When tightened, the claw (71) is embedded in the outer sheath of the external cable (4).
5. The waterproof eight-pin current-tight plug according to claim 1, characterized in that, The edge of the eight-pin connector (11) is provided with a triangular anti-fooling protrusion (8), and the corresponding socket end is provided with a matching anti-fooling groove. The anti-fooling protrusion (8) forms a 15° angle with the line connecting any two adjacent conductive cores (2).
6. The waterproof eight-core current-tight plug according to claim 1, characterized in that, The stepped sealing ring (51) is made of hydrogenated nitrile rubber, and its sealing lip (511) has a wedge-shaped cross section, and an oil reservoir (512) is formed between adjacent sealing lips (511).
7. The waterproof eight-core current-tight plug according to claim 1, characterized in that, The axis of the conductive core (2) is inclined at 5° to the axis of the plug housing (1), and the inclination directions of adjacent conductive cores (2) are opposite.