An underwater power cord connection device for a light fixture

Abstract

This invention relates to the field of lighting technology, and provides an underwater power cord connection device for lighting fixtures. The device includes a first wire, a second wire, a first housing, a second housing, a first outer end cap, a second outer end cap, a first inner end cap, a second inner end cap, an insulating ceramic terminal block, a first waterproof sealing ring, a second waterproof sealing ring, a third waterproof sealing ring, and a fourth waterproof sealing ring. The first inner end cap, the second inner end cap, the first waterproof sealing ring, the second waterproof sealing ring, and the second housing, together with the first and second wires, form a first sealed space. The first outer end cap, the second outer end cap, the third waterproof sealing ring, the fourth waterproof sealing ring, and the first housing, together with the first and second wires, form a second sealed space. This invention solves the problem that existing underwater power cord connection devices lack sufficient waterproof sealing, especially when used in deep water, resulting in water mist and potential safety hazards.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to an underwater power cord connection device for lighting fixtures. Background Technology

[0002] Currently popular marine research fields, such as deep-sea oil and gas resource development, deep-sea exploration and scientific research, and fishing boat fish-attracting lights, involve a large number of underwater electrical devices. These devices all require power lines to connect to surface vessels or shore-based facilities such as fishing boats to form a power circuit, enabling long-term underwater operations. The length of the power lines connecting to the electrical equipment varies depending on the application requirements, thus requiring splicing and connecting devices for the power lines. These connecting devices can be waterproof or non-waterproof.

[0003] Common waterproof power cord connection devices work by connecting or splicing the cables or wires on the water surface according to the required cable or wire length before placing them underwater. The internal electrical wiring is isolated from the outside world through a rubber seal at the end. However, due to varying pressures at different underwater depths, existing underwater power cord connection devices are prone to water seepage into the internal joints due to excessive water pressure, causing short circuits and damaging the wiring. Furthermore, for power cords requiring high power operation in deep water or the ocean, such as those used in fish-attracting lights, the trace amounts of water seeping into the connection device evaporate into water vapor. When power is cut off, the sudden temperature drop in the wires causes this water vapor to condense into mist at the connection points. This mist adheres to the wire cores at the connection points, and after a period of use, especially for power cords used in the ocean, the cores can be corroded by the mist. Excessive water vapor accumulation can also lead to dangerous malfunctions such as short circuits, resulting in a short lifespan. Therefore, given the increasingly stringent requirements for power cord connections in high-power, deep-water, and high-pressure environments, there is an urgent need to develop a power cord connection device that is pressure-resistant, waterproof, and anti-fogging to extend the lifespan of high-pressure, high-power power cord connection devices. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes an underwater power cord connection device for underwater lamps that have good waterproof performance, anti-fogging properties, and high pressure resistance.

[0005] To solve this technical problem, the present invention adopts the following solution: an underwater power cord connection device for a lamp, comprising a first wire, a second wire, a first housing, a second housing, a first outer end cover, a second outer end cover, a first inner end cover, a second inner end cover, an insulating ceramic terminal block, a first waterproof sealing ring, a second waterproof sealing ring, a third waterproof sealing ring, and a fourth waterproof sealing ring. The first housing and the second housing are respectively provided with a first cavity and a second cavity. The first housing has a first opening communicating with the first cavity at both ends, and the second housing has a second opening communicating with the second cavity at both ends. The insulating ceramic terminal block is detachably embedded in the second cavity of the second housing. A first heat-dissipating grease layer is provided between the outer wall of the insulating ceramic terminal block and the inner wall of the cavity of the second housing. The second housing is detachably embedded in the first cavity of the first housing. The first inner end cover and the second inner end cover are respectively connected to the second housing via the first waterproof sealing ring and the second waterproof sealing ring. The second openings at both ends of the body are sealed together. The first outer end cover and the second outer end cover are respectively sealed to the first openings at both ends of the first housing via the third waterproof sealing ring and the fourth waterproof sealing ring. The first wire passes through the first outer end cover, the first opening of the first housing, the first inner end cover, and the second opening of the second housing in sequence, and enters the second cavity of the second housing. It is electrically connected to the second wire via the insulating ceramic terminal. The second wire passes through the second outer end cover, the first opening of the first housing, the second inner end cover, and the second opening of the second housing in sequence, and enters the second cavity of the second housing. It is electrically connected to the first wire via the insulating ceramic terminal. The first inner end cover, the second inner end cover, the first waterproof sealing ring, the second waterproof sealing ring, the second housing, the first wire, and the second wire are assembled to form a first sealed space. The first outer end cover, the second outer end cover, the third waterproof sealing ring, the fourth waterproof sealing ring, the first housing, the first wire, and the second wire are assembled to form a second sealed space.

[0006] Furthermore, a radial gap of 0.05 mm to 0.2 mm is formed between the outer wall of the second housing and the inner wall of the first cavity of the first housing.

[0007] Furthermore, a second heat-dissipating paste layer is provided between the outer wall of the second housing and the inner wall of the first cavity of the first housing.

[0008] Furthermore, the thickness of the first thermal paste layer is 0.1mm-0.3mm.

[0009] Furthermore, the first housing, the second housing, the first outer end cap, the second outer end cap, the first inner end cap, and the second inner end cap are all made of stainless steel, magnesium alloy, brass, or C95800 nickel-aluminum bronze.

[0010] Furthermore, both the first and second waterproof sealing rings are silicone waterproof rings.

[0011] Furthermore, the inner edges of the first openings at both ends of the first housing extend outward to form an annular positioning ring. The third and fourth waterproof sealing rings are respectively provided with annular grooves that are adapted to the annular positioning rings at the ends facing the first housing. The ends of the third and fourth waterproof sealing rings away from the first housing are respectively provided with tapered tapered constrictions.

[0012] Furthermore, both the third and fourth waterproof sealing rings are silicone waterproof rings.

[0013] Furthermore, the outer wall of the insulating ceramic terminal is provided with multiple protruding strips along the radial direction, and the inner wall of the second cavity of the second housing is provided with grooves that are adapted to the protruding strips on the outer wall of the insulating ceramic terminal. The protruding strips on the outer wall of the insulating ceramic terminal are respectively embedded in the grooves of the second cavity of the second housing.

[0014] Furthermore, a connector is provided between the second opening of the second housing and the first inner end cover, or between the second opening of the second housing and the second inner end cover, for disassembling and embedding the insulating ceramic terminal block into the second cavity of the second housing.

[0015] By adopting the aforementioned technical solution, the beneficial effects of the present invention are as follows: A first sealed space is formed by assembling the first inner end cover, the second inner end cover, the first waterproof sealing ring, the second waterproof sealing ring, the second housing, and the first and second wires; a second sealed space is formed by assembling the first outer end cover, the second outer end cover, the third waterproof sealing ring, the fourth waterproof sealing ring, the first housing, and the first and second wires. This allows the wire connection to achieve good waterproofing under the protection of two sealed spaces. Furthermore, since the first sealed space is inside the second sealed space, the first sealed space where the wire connection is located does not need to withstand high pressure, thus greatly improving waterproofing and sealing performance. Simultaneously, the wire connection has high pressure resistance. By using insulated ceramic terminals for wire connection, the heat generated by the high current flowing through the wire can be conducted through the ceramic thermal conductivity layer to the second housing via the first heat dissipation grease layer, and then dissipated back to the first housing for heat dissipation through water. This prevents drastic temperature changes inside the power cord connection device, thus avoiding water vapor formation. The radial gap between the second and first housings is set to 0.05mm to 0.2mm, allowing the heat from the second housing to dissipate easily. The heat is dissipated through the first housing. The second heat-dissipating grease layer further ensures that the heat conducted from the insulating ceramic terminal to the second housing is more effectively transferred to the first housing for heat dissipation, preventing fogging at the wire connection of the power cord connection device. The first housing, second housing, first outer end cover, second outer end cover, first inner end cover, and second inner end cover are all made of stainless steel, magnesium alloy, brass, or C95800 nickel-aluminum bronze, giving the power cord connection device better pressure resistance and suitability for use in seawater. The annular grooves of the third and fourth waterproof sealing rings fit into the annular positioning ring of the second housing to improve its sealing and waterproof performance. At the same time, the tapered tapered openings on them fit into the first and second outer end covers to lock and seal the wire, resulting in a better sealing effect. The protrusions on the outer wall of the insulating ceramic terminal are embedded in the second cavity groove of the second housing, allowing the heat dissipated by the wire during high current operation to be conducted to the second housing more quickly, thus achieving rapid heat dissipation of the wire and preventing heat accumulation that could lead to drastic temperature changes and water fogging when the device stops working. This design can be widely applied. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 This is an exploded structural diagram of an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0019] Among them, 1. First wire, 2. Second wire, 3. First housing, 4. Second housing, 5. First outer end cover, 6. Second outer end cover, 7. First inner end cover, 8. Second inner end cover, 9. Insulating ceramic terminal, 10. First waterproof sealing ring, 11. Second waterproof sealing ring, 12. Third waterproof sealing ring, 13. Fourth waterproof sealing ring, 31. First cavity, 32. Annular positioning ring, 41. Second cavity, 42. Connector. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] refer to Figures 1-3The preferred underwater power cord connection device for the lamp of the present invention includes a first wire 1, a second wire 2, a first housing 3, a second housing 4, a first outer end cover 5, a second outer end cover 6, a first inner end cover 7, a second inner end cover 8, an insulating ceramic terminal block 9, a first waterproof sealing ring 10, a second waterproof sealing ring 11, a third waterproof sealing ring 12, and a fourth waterproof sealing ring 13. The first housing 3, the second housing 4, the first outer end cover 5, the second outer end cover 6, the first inner end cover 7, and the second inner end cover 8 are all made of stainless steel. The first housing 3 and the second housing 4 are respectively provided with a first cavity 31 and a second cavity 41. The first housing 3 has a first opening at both ends communicating with the first cavity 31, and the second housing 4 has a first opening at both ends communicating with the first cavity 31. A second opening communicating with the second cavity 41 is provided. The insulating ceramic terminal 9 is detachably embedded in the second cavity 41 of the second housing 4. A connector 42 is provided between the second opening of the second housing 4 and the first inner end cover for detaching and embedding the insulating ceramic terminal 9 into the second cavity 41 of the second housing 4. A first heat-dissipating grease layer is provided between the outer wall of the insulating ceramic terminal 9 and the inner wall of the cavity of the second housing 4. The second housing 4 is detachably embedded in the first cavity 31 of the first housing 3. A second heat-dissipating grease layer is provided between the outer wall of the second housing 4 and the inner wall of the first cavity 31 of the first housing 3. The first waterproof sealing ring 10 and the second waterproof sealing ring 11 are both columnar silicone waterproof rings. The first inner end cover... 7 and the second inner end cap 8 are respectively sealed to the second openings at both ends of the second housing 4 via the first waterproof sealing ring 10 and the second waterproof sealing ring 11. The inner edges of the first openings at both ends of the first housing 3 extend outward to form an annular positioning ring 32. The third waterproof sealing ring 12 and the fourth waterproof sealing ring 13 are respectively provided with annular grooves that fit the annular positioning ring 32 at the ends facing the first housing 3. The ends of the third waterproof sealing ring 12 and the fourth waterproof sealing ring 13 away from the first housing 3 are respectively provided with tapered tapered openings. The third waterproof sealing ring 12 and the fourth waterproof sealing ring 13 are both silicone waterproof rings. The first outer end cap 5 and the second outer end cap 6 are respectively sealed to the first housing 4 via the third waterproof sealing ring 12 and the fourth waterproof sealing ring 13. The first openings at both ends of the housing 3 are sealed together. The first wire 1 passes sequentially through the first outer end cover 5, the first opening of the first housing 3, the first inner end cover 7, and the second opening of the second housing 4, and enters the second cavity 41 of the second housing 4. It is electrically connected to the second wire 2 via the insulating ceramic terminal 9. The second wire 2 passes sequentially through the second outer end cover 6, the first opening of the first housing 3, the second inner end cover 8, and the second opening of the second housing 4, and enters the second cavity 41 of the second housing 4. It is electrically connected to the first wire 1 via the insulating ceramic terminal 9. The first inner end cover 7, the second inner end cover 8, the first waterproof sealing ring 10, the second waterproof sealing ring 11, the second housing 4, the first wire 1, and the second wire 2 are assembled to form a first sealed space.The first outer end cap 5, the second outer end cap 6, the third waterproof sealing ring 12, the fourth waterproof sealing ring 13, the first housing 3, the first wire 1, and the second wire 2 are assembled to form the second sealed space.

[0023] During assembly, the first wire 1 passes sequentially through the first outer end cover 5, the third waterproof sealing ring 12, the first housing 3, the first inner end cover 7, the first waterproof sealing ring 10, and the connector 42. The second wire 2 passes sequentially through the second outer end cover 6, the fourth waterproof sealing ring 13, the second inner end cover 8, the second waterproof sealing ring 11, and the second housing 4. Then, the first wire 1 and the second wire are inserted into the two ends of the insulating ceramic terminal 9 and locked to electrically connect the first wire 1 and the second wire 2 through the insulating ceramic terminal 9. Next, a first heat-dissipating paste layer is applied to the outer surface of the insulating ceramic terminal 9. Then, the insulating ceramic terminal 9 coated with the first heat-dissipating paste layer is embedded into the second cavity 41 inside the second housing 4. The connector 42 is then connected to the second housing 4. The threads are screwed together and locked. The first waterproof sealing ring 10 and the second waterproof sealing ring 11 are respectively fitted onto the second openings at both ends of the second housing 4. Then, the first inner end cap 7 and the second inner end cap 8 are respectively threaded onto the second openings at both ends of the second housing 4 through the first waterproof sealing ring 10 and the second waterproof sealing ring 11 to achieve a seal and lock. Next, the third waterproof sealing ring 12 and the fourth waterproof sealing ring 13 are provided with annular grooves and fitted onto the annular positioning ring 32 at the first opening of the first housing 3. Then, the first outer end cap 5 and the second outer end cap 6 are respectively threaded onto the first openings at both ends of the first housing 3 through the third waterproof sealing ring 12 and the fourth waterproof sealing ring 13 to achieve a seal and lock. The electrical connection sealing assembly of the first wire 1 and the second wire 2 is completed.

[0024] In the above embodiments, a second heat-dissipating paste layer may not be provided between the outer wall of the second housing and the inner wall of the first cavity of the first housing. Forming a radial gap of 0.05mm to 0.2mm between the outer wall of the second housing and the inner wall of the first cavity of the first housing can effectively ensure that the heat transferred outward by the second housing is transferred to the first housing. The thickness of both the first and second heat-dissipating paste layers is preferably 0.1mm-0.3mm. The first housing, second housing, first outer end cover, second outer end cover, first inner end cover, and second inner end cover can all be made of magnesium alloy, brass, or C95800 nickel-aluminum bronze. A connector between the second opening of the second housing and the first inner end cover may also be provided between the second opening of the second housing and the second inner end cover. This connector is provided to facilitate the confinement of the insulating ceramic terminal within the second cavity of the second housing and to make the positioning of the insulating ceramic terminal more stable. This connector may also be omitted; simply ensure that the second opening of the second housing can be designed so that the insulating ceramic terminal can be embedded within the second cavity of the second housing. The first housing, second housing, first outer end cap, second outer end cap, first inner end cap, and second inner end cap are made of the aforementioned metals based on manufacturing costs and cost-effectiveness considerations. They can also be made of higher-cost metals, such as titanium alloys or nickel-copper-based corrosion-resistant alloys. The first, second, third, and fourth waterproof sealing rings can also be made of materials other than silicone, such as fluororubber or hydrogenated nitrile rubber, which are resistant to seawater corrosion. When used in high-current wires or cables, to improve heat dissipation efficiency, the structure of the insulating ceramic terminal and the second housing can be adjusted. For example, multiple protruding strips can be provided radially on the outer wall of the insulating ceramic terminal, and grooves adapted to these strips can be provided on the inner wall of the second cavity of the second housing. The protruding strips on the outer wall of the insulating ceramic terminal are embedded into the grooves of the second cavity of the second housing, increasing the contact area between the insulating ceramic terminal and the second housing, allowing the insulating ceramic terminal to conduct heat away more quickly.

[0025] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. An underwater power cord connection device for a lamp, characterized in that: The system includes a first wire, a second wire, a first housing, a second housing, a first outer end cap, a second outer end cap, a first inner end cap, a second inner end cap, an insulating ceramic terminal block, a first waterproof sealing ring, a second waterproof sealing ring, a third waterproof sealing ring, and a fourth waterproof sealing ring. The first and second housings are respectively provided with a first cavity and a second cavity. The first housing has a first opening at each end communicating with the first cavity, and the second housing has a second opening at each end communicating with the second cavity. The insulating ceramic terminal block is detachably embedded in the second cavity of the second housing. A first heat-dissipating grease layer is provided between the outer wall of the insulating ceramic terminal block and the inner wall of the cavity of the second housing. The second housing is detachably embedded in the first cavity of the first housing. The first and second inner end caps are respectively sealed to the second openings at both ends of the second housing via the first and second waterproof sealing rings. The first and second outer end caps are respectively sealed to the first openings at both ends of the first housing via the third and fourth waterproof sealing rings. The first wire passes sequentially through the first outer end cap, the first opening of the first housing, and... The first inner end cover and the second opening of the second housing pass through the second cavity of the second housing and are electrically connected to the second wire via an insulating ceramic terminal. The second wire passes through the second outer end cover, the first opening of the first housing, the second inner end cover, and the second opening of the second housing in sequence and passes through the second cavity of the second housing, and is electrically connected to the first wire via an insulating ceramic terminal. The first inner end cover, the second inner end cover, the first waterproof sealing ring, the second waterproof sealing ring, the second housing, the first wire, and the second wire are assembled to form a first sealed space. The first outer end cover, the second outer end cover, the third waterproof sealing ring, the fourth waterproof sealing ring, the first housing, the first wire, and the second wire are assembled to form a second sealed space. A second heat dissipation grease layer is provided between the outer wall of the second housing and the inner wall of the first cavity of the first housing. The inner edges of the first openings at both ends of the first housing extend outward to form an annular positioning ring. The third waterproof sealing ring and the fourth waterproof sealing ring have annular grooves that fit the annular positioning rings at their ends facing the first housing. The third waterproof sealing ring and the fourth waterproof sealing ring have tapered tapered openings at their ends away from the first housing.

2. The underwater power cord connection device for the lamp according to claim 1, characterized in that: A radial gap of 0.05 mm to 0.2 mm is formed between the outer wall of the second housing and the inner wall of the first cavity of the first housing.

3. The underwater power cord connection device for the lamp according to claim 1, characterized in that: The thickness of the first thermal paste layer is 0.1mm-0.3mm.

4. The underwater power cord connection device for the lamp according to claim 1, characterized in that: The first housing, the second housing, the first outer end cap, the second outer end cap, the first inner end cap, and the second inner end cap are all made of any one of stainless steel, magnesium alloy, brass, or C95800 nickel-aluminum bronze.

5. The underwater power cord connection device for the lamp according to claim 1, characterized in that: Both the first and second waterproof sealing rings are silicone waterproof rings.

6. The underwater power cord connection device for the lamp according to claim 1, characterized in that: Both the third and fourth waterproof sealing rings are silicone waterproof rings.

7. The underwater power cord connection device for the lamp according to claim 1, characterized in that: The outer wall of the insulating ceramic terminal has multiple protruding strips along the radial direction. The inner wall of the second cavity of the second housing has grooves that match the protruding strips on the outer wall of the insulating ceramic terminal. The protruding strips on the outer wall of the insulating ceramic terminal are respectively embedded in the grooves of the second cavity of the second housing.

8. The underwater power cord connection device for the lamp according to claim 1, characterized in that: A connector is provided between the second opening of the second housing and the first inner end cover, or between the second opening of the second housing and the second inner end cover, for disassembling and embedding the insulating ceramic terminal block into the second cavity of the second housing.

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