A quick plug-in connection device for multi-core cables

Abstract

This utility model relates to the technical field of cable connection devices, specifically a quick-connect connection device for multi-core cables. Terminals and plugs are electrically connected and detachably housed inside a connecting sleeve, with the ends of both terminals and plugs extending outside the connecting sleeve. One end of a first sealing ring is detachably connected to one end of a protective sleeve, and the other end of the first sealing ring is detachably located on the upper side of the connecting sleeve. One end of the protective sleeve presses against the connecting sleeve and covers the end of the terminal, while the other end of the protective sleeve is detachably connected to the connector. A first sealing element is also detachably installed on the upper side of the connecting sleeve, covering the first sealing ring and the protective sleeve. A second sealing element is detachably installed on the lower side of the connecting sleeve, covering the end of the plug. This utility model's quick-connect connection device for multi-core cables offers high stability, good insulation performance, effectively prevents the penetration of moisture and corrosive media, and facilitates heat dissipation.

Description

Technical Field

[0001] This utility model relates to the technical field of cable connection devices, specifically to a quick-connect connection device for multi-core cables. Background Technology

[0002] Sludge treatment, as a crucial link in urban wastewater treatment, is of great significance for achieving solid waste reduction, harmlessness, and resource utilization. The aerobic composting fermentation process for sludge involves mixing sludge with auxiliary materials in a specific ratio and placing the mixture in a fermentation tank for biodegradation, stabilizing the sludge through the metabolic action of microorganisms. During this process, to ensure uniform heating and sufficient oxygen supply to the fermentation materials, the compost pile needs to be regularly turned over using a turner. The stable operation of the turner directly affects the fermentation efficiency and treatment effect. Due to microbial activity and material degradation, the fermentation workshop is constantly exposed to high temperature and humidity (humidity > 85%, temperature up to 60℃) and gases such as hydrogen sulfide and ammonia, causing continuous corrosion to equipment (e.g., turner) components. The turner's circuitry relies on multi-core cables to transmit power and signals, but vehicle vibration and mechanical friction can easily cause these cables to break. Traditional repair methods include two approaches: one is to wrap two multi-core cables (circuit circuits) with insulating tape for direct connection; the other is to use a cable connector connection device for electrical installation for quick connection.

[0003] However, both of these connection methods have obvious drawbacks in the special environment of the fermentation workshop:

[0004] 1. Insulating tape is prone to aging and cracking, leading to a decrease in insulation performance; manual connection has poor stability, and vibration can easily cause the joint of two multi-core cables to loosen.

[0005] Second, the cable joint connection device used for power distribution installation has problems such as poor sealing, poor heat dissipation, and the joint of two multi-core cables is easily damaged by pressure, resulting in loosening and deformation.

[0006] In environments with high humidity or a risk of liquid corrosion, moisture can easily enter through gaps in the connection device. The infiltration of moisture and corrosive media can easily cause short circuits, leakage, and corrosion in multi-core cables, reducing their service life. It can also cause signal interruptions or unstable equipment power, and in severe cases, lead to the shutdown of the turning machine, affecting process continuity. Multi-core cables generate heat when transmitting electricity. If the cable joint connection device used in power distribution installation cannot effectively dissipate heat, the accumulated heat will cause the multi-core cable temperature to rise continuously, further accelerating the aging of the insulation material, increasing resistance, and even causing safety accidents such as fires. When multi-core cables are subjected to external compression or tension, the joint between the two multi-core cables, due to a lack of sufficient compressive and tensile strength design, is prone to damage from pressure, loosening, and deformation, resulting in poor contact and affecting power transmission.

[0007] Therefore, there is an urgent need for a quick-connect device for multi-core cables to solve the above problems. Utility Model Content

[0008] To address the technical problems of easily aging and cracking insulating tape leading to decreased insulation performance; poor stability of manual connections, with vibration easily causing loosening at the joint of two multi-core cables; and issues with cable joint connection devices used in power distribution installations such as poor sealing, inadequate heat dissipation, and susceptibility to pressure damage at the joint of two multi-core cables, this utility model provides a quick-connect connection device for multi-core cables. The terminal, plug, connecting sleeve, first sealing ring, protective sleeve, and connector can be quickly disassembled, enabling rapid assembly and disassembly of two multi-core cables. This enhances pressure and vibration resistance, provides high connection stability, and prevents loosening, solving the problem of pressure damage and loosening / deformation at the joint of two multi-core cables. Furthermore, it offers good insulation performance. The first sealing element, second sealing element, and connector effectively prevent the infiltration of moisture and corrosive media, ensuring good sealing performance. Simultaneously, the structure of the first sealing element facilitates heat dissipation.

[0009] This utility model provides a quick-connect device for multi-core cables, including terminals, plugs, connecting sleeves, a first sealing ring, a protective sleeve, and a connector. The terminals and plugs are electrically connected and both are detachably disposed inside the connecting sleeve, with the ends of the terminals and plugs extending outside the connecting sleeve. One end of the first sealing ring is detachably connected to one end of the protective sleeve, and the other end of the first sealing ring is detachably disposed on the upper side of the connecting sleeve. One end of the protective sleeve is pressed against the connecting sleeve and covers the end of the terminal, while the other end of the protective sleeve is detachably connected to the connector. A first sealing element is also detachably disposed on the upper side of the connecting sleeve, covering the first sealing ring and the protective sleeve. A second sealing element is detachably disposed on the lower side of the connecting sleeve, covering the end of the plug.

[0010] Furthermore, the connecting sleeve is fixedly provided with a positioning inner boss and a positioning strip. The positioning inner boss is located on the side of the positioning strip. The terminal is provided with a first positioning groove that matches the positioning strip. The plug is provided with a second positioning groove that matches the positioning strip. The second positioning groove is engaged with the lower part of the positioning strip and the bottom of the plug is in contact with the positioning inner boss. The first positioning groove is engaged with the upper part of the positioning strip and the bottom of the terminal is in contact with the top of the plug.

[0011] Furthermore, the terminal has a structure that is narrower at the top and wider at the bottom. The first positioning groove is located at the lower part of the terminal, and the upper part of the terminal extends to the outside of the connecting sleeve. A plurality of power-conducting holes are arranged in a ring on the terminal. A first pin is fixedly installed in each power-conducting hole, and the head of each first pin extends to the outside of the power-conducting hole. A plurality of second pins are arranged in a ring on the plug. The tail of each second pin is inserted into the power-conducting hole, and the head of each second pin extends to the outside of the connecting sleeve.

[0012] Furthermore, one end of the first sealing ring is fixedly provided with an inner flange, one end of the protective sleeve is fixedly provided with an outer flange, one end of the first sealing ring is sleeved on one end of the protective sleeve and the inner flange is in contact with the outer flange, the other end of the first sealing ring is threaded on the upper side of the connecting sleeve, a positioning ring is fixedly provided on the outside of the connecting sleeve and the first sealing ring is in contact with the positioning ring, and the protective sleeve covers the upper part of the terminal.

[0013] Furthermore, the first sealing element includes a first sealing shell and a second sealing shell. The first sealing shell is sleeved on the outside of the connecting sleeve and the first sealing ring. A limiting flange is fixedly provided at the bottom of the first sealing shell and the limiting flange contacts the positioning ring. A sealing external thread is provided at the top of the first sealing shell. The second sealing shell is sleeved on the outside of the protective sleeve. A sealing internal thread matching the sealing external thread is provided at the bottom of the second sealing shell. The top of the first sealing shell and the bottom of the second sealing shell are threadedly connected by the sealing external thread and the sealing internal thread. A flexible sealing ring is fixedly provided at the top of the second sealing shell and the flexible sealing ring contacts the protective sleeve.

[0014] Furthermore, the first sealing shell is uniformly provided with a plurality of heat dissipation holes, and an intercepting membrane is fixedly disposed in each of the heat dissipation holes; the second sealing shell is uniformly provided with a plurality of heat dissipation blind grooves.

[0015] Furthermore, the second sealing element includes a second sealing ring, a conical protective sleeve, and a second gland head. The second sealing ring and the second gland head are fixedly disposed at both ends of the conical protective sleeve and communicate with it. The second sealing ring is threaded on the lower side of the outside of the connecting sleeve. A backlash ring is fixedly disposed on the lower side of the outside of the connecting sleeve and is located below the positioning ring. The second sealing ring is in contact with the backlash ring. The head of each second pin protrudes to the outside of the connecting sleeve and is located in the conical protective sleeve.

[0016] Furthermore, the outer wall of the connecting sleeve is provided with a first external thread located above the positioning ring, and the inner wall of the first sealing ring is provided with a first internal thread that matches the first external thread. The first sealing ring is threadedly connected to the upper side of the connecting sleeve through the first external thread and the first internal thread. The outer wall of the connecting sleeve is provided with a second external thread located below the positioning ring, and the anti-reverse ring is located at the second external thread. The inner wall of the second sealing ring is provided with a second internal thread that matches the second external thread. The second sealing ring is threadedly connected to the lower side of the connecting sleeve through the second external thread and the second internal thread.

[0017] Furthermore, the connector is provided with a plurality of wiring holes arranged in a ring, and a first gland head communicating with the plurality of wiring holes is fixedly provided on the connector; a clamp is fixedly provided at the other end of the protective sleeve, the connector is fixedly connected to the clamp, and a flexible sealing sleeve is fixedly provided on the outside of the connector, the flexible sealing sleeve being located between the wiring hole and the clamp.

[0018] Furthermore, the clamp includes a first semicircular seat and a second semicircular seat. The first semicircular seat is fixedly disposed at the other end of the protective sleeve, and the second semicircular seat is detachably disposed on the first semicircular seat. The connector is fixedly connected between the first semicircular seat and the second semicircular seat, and the flexible sealing sleeve is located between the wiring hole and the first semicircular seat and the second semicircular seat.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The quick-connect device for multi-core cables of this utility model allows for quick disassembly and assembly of terminals, plugs, connecting sleeves, first sealing rings, protective sleeves, and connectors, enabling rapid assembly and disassembly of two multi-core cables. This enhances the resistance to pressure and shock, provides high connection stability, and prevents loosening. It solves the problem of easy pressure damage and loosening / deformation at the joints of two multi-core cables, and also provides good insulation performance.

[0021] 2. The first seal prevents moisture and corrosive media from seeping into the interior of the protective sleeve and the terminal from the connection between the first sealing ring and the protective sleeve; the connector prevents moisture and corrosive media from seeping into the interior of the protective sleeve from the connector; the second seal prevents moisture and corrosive media from seeping into the plug from the second seal.

[0022] 3. The design of the vent holes and the intercepting membrane on the first sealing shell ensures free airflow and accelerates heat dissipation while preventing external dust, particles, and other impurities from entering the connecting device. This avoids reduced heat dissipation efficiency and electrical faults caused by impurity accumulation, achieving a dual function of heat dissipation and dust prevention. This extends the service life of the multi-core cable and connecting device, ensuring safe and stable power transmission. The heat dissipation blind groove increases the heat dissipation area of ​​the second sealing shell, allowing the heat generated by the multi-core cable to be quickly transferred to the external environment, effectively reducing the internal temperature. Attached Figure Description

[0023] Figure 1 This is an exploded structural diagram of the quick-connect device for multi-core cables according to this utility model;

[0024] Figure 2 This is a schematic diagram of the assembly structure of the quick-connect device for multi-core cables according to this utility model;

[0025] Figure 3 This is an exploded structural diagram of the terminal, plug, connecting sleeve, first sealing ring, and protective sleeve of this utility model;

[0026] Figure 4 This is a schematic diagram of the assembly structure of the terminal, plug, connecting sleeve, first sealing ring, protective sleeve and wire head of this utility model;

[0027] Figure 5 This is an exploded structural diagram of the connecting sleeve and the protective sleeve of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the flexible sealing ring of this utility model;

[0029] Figure 7 This is a schematic diagram of the connecting sleeve of this utility model;

[0030] The numbers in the attached diagram are:

[0031] 1. Terminal; 11. First positioning groove; 12. Power-conducting hole; 13. First pin; 14. Separator block;

[0032] 2. Plug; 21. Second positioning slot; 22. Second pin; 221. Pin tip;

[0033] 3. Connecting sleeve; 31. Positioning inner boss; 32. Positioning strip; 33. Positioning ring; 34. Anti-reverse ring; 35. First external thread; 36. Second external thread;

[0034] 4. First sealing ring; 41. Inner flange; 42. First internal thread;

[0035] 5. Protective sleeve; 51. First cylinder; 511. Outer flange; 52. Second cylinder; 53. Third cylinder;

[0036] 6. Terminal block; 61. Wiring hole; 62. First gland; 63. Clamp; 631. First semi-circular seat; 632. Second semi-circular seat; 64. Flexible sealing sleeve;

[0037] 7. First sealing shell; 71. Limiting flange; 72. Sealing external thread; 73. Heat dissipation hole;

[0038] 8. Second sealing shell; 81. Sealing internal thread; 82. Tapered sleeve joint; 821. Flexible sealing ring; 83. Heat dissipation blind groove;

[0039] 9. Second seal; 91. Second sealing ring; 911. Second internal thread; 92. Conical protective sleeve; 93. Second gland head. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1-7 As shown, a quick-connect connector for a multi-core cable includes a terminal 1, a plug 2, a connecting sleeve 3, a first sealing ring 4, a protective sleeve 5, and a terminal block 6. The terminal 1 and plug 2 are electrically connected and both are detachably disposed inside the connecting sleeve 3, with the ends of both the terminal 1 and plug 2 extending outside the connecting sleeve 3. One end of the first sealing ring 4 is detachably connected to one end of the protective sleeve 5, and the other end of the first sealing ring 4 is detachably disposed on the upper side of the connecting sleeve 3. One end of the protective sleeve 5 is pressed against the connecting sleeve 3 and covers the end of the terminal 1, while the other end of the protective sleeve 5 is detachably connected to the terminal block 6. A first sealing element is also detachably disposed on the upper side of the connecting sleeve 3, covering the first sealing ring 4 and the protective sleeve 5. A second sealing element 9 is detachably disposed on the lower side of the connecting sleeve 3, covering the end of the plug 2.

[0042] The process of using a quick-connect connector for multi-core cables: First, fix terminal 1 and plug 2 to the connecting sleeve 3. Specifically, plug 2 is fixed to the lower part of the connecting sleeve 3, and terminal 1 is fixed to the upper part of the connecting sleeve 3. Finally, both terminal 1 and plug 2 are fixed inside the connecting sleeve 3, and plug 2 is in contact with terminal 1.

[0043] Then, one end of the first sealing ring 4 is fixedly connected to one end of the protective sleeve 5, and the other end of the first sealing ring 4 is fixed to the upper side of the outside of the connecting sleeve 3. At this time, one end of the protective sleeve 5 is pressed against the top of the connecting sleeve 3, and the protective sleeve 5 covers the end of the terminal 1.

[0044] Subsequently, the (power supply) cable is sealed and fixed to connector 6, which prevents moisture and corrosive media from seeping into the protective sleeve 5. Connector 6 is then fixed to the other end of the protective sleeve 5. Multiple wires in the (power supply) cable pass through connector 6 and the inside of the protective sleeve 5 before being inserted into terminal 1, achieving electrical connection with terminal 1. The (power supply) cable is relatively short and is used for electrical connection with external power supply equipment.

[0045] Continue to fix the first sealing element to the upper side of the outside of the connecting sleeve 3. The first sealing element covers the first sealing ring 4 and the protective sleeve 5. The first sealing element prevents moisture and corrosive media from seeping into the interior of the protective sleeve 5 and the terminal 1 from the connection between the first sealing ring 4 and the protective sleeve 5.

[0046] Finally, the (power-end) cable is sealed and fixed to the second sealing element 9. The second sealing element 9 prevents moisture and corrosive media from seeping into the plug 2. The second sealing element 9 is then fixed to the lower side of the connecting sleeve 3. Multiple wires in the (power-end) cable pass through the second sealing element 9 and are inserted into the plug 2 to achieve electrical connection with the plug 2. The (power-end) cable is used for electrical connection with the external turning machine.

[0047] Because terminal 1 and plug 2 are electrically connected, the (power supply) cable and the (power consumption) cable are electrically connected. All other components are non-conductive and have good insulation properties.

[0048] The first seal, the second seal 9, and the connector 6 effectively prevent the infiltration of moisture and corrosive media. Meanwhile, the structure of the first seal facilitates heat dissipation.

[0049] The quick-connect device for multi-core cables in this embodiment allows for rapid disassembly and assembly of two multi-core cables, including terminal 1, plug 2, connecting sleeve 3, first sealing ring 4, protective sleeve 5, and connector 6. This enhances the pressure and shock resistance, improves connection stability, and prevents loosening. It solves the problem of easy pressure damage and loosening / deformation at the joint of two multi-core cables, and provides good insulation performance. The first seal, second seal 9, and connector 6 effectively prevent the infiltration of moisture and corrosive media, ensuring good sealing performance. At the same time, the structure of the first seal facilitates heat dissipation.

[0050] In one possible implementation, the connecting sleeve 3 is internally fixedly provided with a positioning inner boss 31 and a positioning strip 32. The connecting sleeve 3 is a hollow cylinder, and the connecting sleeve 3, the positioning inner boss 31, and the positioning strip 32 are integrally formed. The positioning inner boss 31 is located to the side of the positioning strip 32 and is located at the leftmost end of the connecting sleeve 3. The positioning strip 32 is provided on the inner wall of the connecting sleeve 3 and is integrally formed and extends along the axial direction of the connecting sleeve 3. The outer wall of the terminal 1 is provided with a first positioning groove 11 that matches the positioning strip 32 and extends along the axial direction of the terminal 1. The outer wall of the plug 2 is provided with a second positioning groove 21 that matches the positioning strip 32 and extends along the axial direction of the plug 2. The second positioning groove 21 is engaged with the lower part of the positioning strip 32 and the bottom of the plug 2 is in contact with the positioning inner boss 31. The first positioning groove 11 is engaged with the upper part of the positioning strip 32 and the bottom of the terminal 1 is in contact with the top of the plug 2.

[0051] The plug 2 is inserted and fixed to the lower part of the positioning strip 32 via the second positioning groove 21 and the positioning strip 32 (the plug 2 is inserted from the right side of the connecting sleeve 3), and the positioning strip 32 limits the position of the plug 2. Then, the terminal 1 is inserted and fixed to the upper part of the positioning strip 32 via the first positioning groove 11 and the positioning strip 32 (the terminal 1 is inserted from the right side of the connecting sleeve 3), and the plug 2 again limits the position of the terminal 1. Finally, both the terminal 1 and the plug 2 are fixed inside the connecting sleeve 3. Conversely, the terminal 1 and the plug 2 can be removed sequentially from inside the connecting sleeve 3. The connection between the terminal 1, the plug 2, and the connecting sleeve 3 is highly stable and not easily loosened.

[0052] In one possible implementation, the terminal 1 has a structure that is narrower at the top and wider at the bottom. The terminal 1 is cylindrical, with the first positioning groove 11 located at the lower part of the terminal 1. The upper part of the terminal 1 extends to the outside of the connecting sleeve 3. A plurality of annularly distributed power-conducting holes 12 are provided through the terminal 1. The terminal 1, the first positioning groove 11, and the power-conducting holes 12 are integrally formed. A first pin 13 is fixedly disposed in each power-conducting hole 12, and the head of each first pin 13 extends to the outside of the power-conducting hole 12. A plurality of annularly distributed second pins 22 are provided through the plug 2. The tail of each second pin 22 is inserted into the power-conducting hole 12, and the head of each second pin 22 extends to the outside of the connecting sleeve 3. The structure of the first pin 13 and the second pin 22 is prior art and will not be described in detail here. The number of first pins 13 and second pins 22 is the same. In this embodiment, there are four of each type. The first pins 13, the power-conducting hole 12, and the second pins 22 are electrically connected. Alternatively, the number of first pins 13 and second pins 22 can be set to five, six, seven, or eight, depending on requirements. It should be noted that, except for the first pins 13, second pins 22, and power-conducting hole 12 which are energized, the terminal 1, plug 2, connecting sleeve 3, and connector 6 can be made of ceramic material, which provides good insulation.

[0053] Preferably, the head of the first pin 13 is provided with a first screw hole, and multiple wire cores in the (power end) cable are locked to multiple first pins 13 through the first screw hole and the first bolt, wherein the multiple wire cores in the (power end) cable are electrically connected to multiple first pins 13 respectively.

[0054] Preferably, the head of the second pin 22 is provided with a second screw hole, and multiple wire cores in the (power end) cable are locked to multiple second pins 22 through the second screw hole and the second bolt, wherein the multiple wire cores in the (power end) cable are electrically connected to multiple second pins 22 respectively.

[0055] Preferably, the tail of the second pin 22 is fixedly provided with a pin head 221, which is inserted into the power-conducting hole 12 to ensure that the second pin 22 can be electrically connected with the first pin 13 and the power-conducting hole 12.

[0056] Preferably, a separator block 14 is fixedly provided on the terminal 1. The separator block 14 is cross-shaped and separates the four first pins 13. The separator block 14 can be changed according to the number of first pins 13.

[0057] In one possible implementation, an inner flange 41 is fixedly provided at one end of the first sealing ring 4, and an outer flange 511 is fixedly provided at one end of the protective sleeve 5. One end of the first sealing ring 4 is sleeved on one end of the protective sleeve 5, and the inner flange 41 and the outer flange 511 are in contact. The other end of the first sealing ring 4 is threaded on the upper side of the outside of the connecting sleeve 3. A positioning ring 33 is fixedly provided on the outside of the connecting sleeve 3, and the first sealing ring 4 is in contact with the positioning ring 33. The connecting sleeve 3 and the positioning ring 33 are integrally formed, and the protective sleeve 5 covers the upper part of the terminal 1.

[0058] The first sealing ring 4 is inserted into the protective sleeve 5 from the right side, while the inner flange 41 contacts the outer flange 511, providing a limiting position. The other end of the first sealing ring 4 is threaded to the upper side of the connecting sleeve 3, where it contacts the positioning ring 33. The outer diameter of the protective sleeve 5 is the same as that of the connecting sleeve 3, and one end of the protective sleeve 5 is pressed against the top of the connecting sleeve 3, covering the upper part of the terminal 1. The first sealing ring 4 and the positioning ring 33 cooperate to fix the protective sleeve 5 onto the connecting sleeve 3. The connection between the first sealing ring 4, the protective sleeve 5, and the connecting sleeve 3 is highly stable and not easily loosened.

[0059] In one possible implementation, the first sealing element includes a first sealing shell 7 and a second sealing shell 8. The first sealing shell 7 is sleeved on the outside of the connecting sleeve 3 and the first sealing ring 4. A limiting flange 71 is fixedly provided at the bottom of the first sealing shell 7 and the limiting flange 71 contacts the positioning ring 33. A sealing external thread 72 is provided at the top of the first sealing shell 7. The second sealing shell 8 is sleeved on the outside of the protective sleeve 5. A sealing internal thread 81 matching the sealing external thread 72 is provided at the bottom of the second sealing shell 8. The top of the first sealing shell 7 and the bottom of the second sealing shell 8 are threadedly connected by the sealing external thread 72 and the sealing internal thread 81. A flexible sealing ring 821 is fixedly provided at the top of the second sealing shell 8 and the flexible sealing ring 821 contacts the protective sleeve 5.

[0060] The first sealing shell 7 is fitted onto the connecting sleeve 3 from the left side, and the limiting flange 71 contacts the positioning ring 33, thus limiting the movement of the connecting sleeve 3. The second sealing shell 8 is fitted onto the protective sleeve 5 from the right side of the connecting sleeve 3. The first sealing shell 7 and the second sealing shell 8 are threaded together by the sealing external thread 72 and the sealing internal thread 81. At this time, the first sealing shell 7 and the second sealing shell 8 are fixedly connected, and the first sealing shell 7 is fixed to the outside of the connecting sleeve 3 and the first sealing ring 4, while the second sealing shell 8 is fixed to the protective sleeve 5. The flexible sealing ring 821 contacts the protective sleeve 5.

[0061] The connection between the first sealing shell 7, the second sealing shell 8, the connecting sleeve 3, and the protective sleeve 5 is highly stable and not easily loosened. The first sealing shell 7 and the second sealing shell 8 can be made of high-strength materials, which can effectively resist vibration, compression, and tension when subjected to force, maintain the stability of the connection between the two multi-core cables, ensure that a good electrical connection is maintained at all times during power transmission, and reduce maintenance costs and safety hazards caused by damage to the connection parts.

[0062] The threaded connection between the first sealing shell 7 and the second sealing shell 8 prevents moisture and corrosive media from seeping into the protective sleeve 5 and the terminal 1 from the connection point. The first sealing shell 7 and the second sealing shell 8 improve the sealing performance and stability of the connection device.

[0063] The flexible sealing ring 821 is made of rubber. The flexible sealing ring 821 prevents moisture and corrosive media from seeping into the protective sleeve 5 and terminal 1 from the connection between the second sealing shell 8 and the protective sleeve 5. Utilizing the elastic deformation of the flexible sealing ring 821 to achieve a flexible seal, even under complex vibration, compression, tension, or temperature changes, the flexible sealing ring 821 ensures a consistently good seal at the connection, greatly improving the reliability and stability of multi-core cables in harsh environments such as humid, dusty, and underwater conditions.

[0064] Preferably, the protective sleeve 5 includes a first cylindrical body 51, a second cylindrical body 52, and a third cylindrical body 53 that are fixedly connected and communicate with each other. The first cylindrical body 51 and the second cylindrical body 52 are hollow cylinders. An outer flange 511 is provided on the outer wall of the first cylindrical body 51. The outer diameter of the first cylindrical body 51 is smaller than the outer diameter of the second cylindrical body 52. ​​The third cylindrical body 53 is a hollow cone. Specifically, the second sealing shell 8 is sleeved on the outside of the first cylindrical body 51, the second cylindrical body 52, and the third cylindrical body 53, and the flexible sealing ring 821 is in contact with the third cylindrical body 53, i.e., tightly fitted.

[0065] Preferably, a tapered sleeve joint 82 is fixedly provided on the top of the second sealing shell 8, and a flexible sealing ring 821 is fixedly provided on the inner wall of the tapered sleeve joint 82. The tapered sleeve joint 82 matches the shape of the third cylinder 53.

[0066] In one possible implementation, the first sealing shell 7 is uniformly provided with a plurality of heat dissipation holes 73. Specifically, a plurality of heat dissipation holes 73 are uniformly provided on a portion of the end face of the first sealing shell 7, and an intercepting membrane is fixedly disposed within each of the heat dissipation holes 73; the second sealing shell 8 is uniformly provided with a plurality of heat dissipation blind grooves 83. The structure of the intercepting membrane is prior art and will not be described in detail here. The arrangement of the first sealing shell 7 and the second sealing shell 8 effectively improves the poor heat dissipation situation and avoids heat accumulation that accelerates insulation aging. The heat dissipation blind grooves 83 are integrally formed and distributed along the axial direction of the second sealing shell 8. The vent holes allow air circulation, while the intercepting membrane prevents external dust, particles, and other impurities from entering the interior of the connecting device. The combined design of the vent holes and the intercepting membrane ensures free air circulation and accelerates heat dissipation while preventing external dust, particles, and other impurities from entering the interior of the connecting device, avoiding the decrease in heat dissipation efficiency and electrical faults caused by impurity accumulation. This achieves the dual functions of heat dissipation and dust prevention, extends the service life of the multi-core cable and the connecting device, and ensures the safe and stable transmission of power. The heat dissipation blind groove 83 increases the heat dissipation area of ​​the second sealing shell 8, enabling the heat generated by the multi-core cable to be quickly transferred to the external environment and effectively reducing the internal temperature.

[0067] In one possible implementation, the second sealing element 9 includes a second sealing ring 91, a conical protective sleeve 92, and a second gland 93. The second sealing ring 91 and the second gland 93 are fixedly disposed at both ends of the conical protective sleeve 92 and communicate with it. The second sealing ring 91 is threaded onto the lower side of the outside of the connecting sleeve 3. A retaining ring 34 is fixedly disposed on the lower side of the outside of the connecting sleeve 3, and the retaining ring 34 is located below the positioning ring 33. The second sealing ring 91 contacts the retaining ring 34. The head of each second pin 22 protrudes outside the connecting sleeve 3 and is located in the conical protective sleeve 92. The structure of the second gland 93 is prior art and will not be described in detail here. The second sealing ring 91 is threaded onto the lower side of the outside of the connecting sleeve 3, and the second sealing ring 91 contacts the retaining ring 34, with the retaining ring 34 and the second sealing ring 91 providing a limiting effect. At this time, the heads of multiple second pins 22 protrude outside the connecting sleeve 3 and are located in the conical protective sleeve 92. The connection between the second sealing ring 91 and the connecting sleeve 3 is highly stable and not easily loosened.

[0068] The second sealing ring 91 and the anti-reverse ring 34 prevent moisture and corrosive media from seeping into the plug 2 through the space between them. The conical protective sleeve 92 also provides sealing protection for the second pin 22 on the plug 2.

[0069] The second gland 93 provides a sealed protection for the (power-consuming) cable. Specifically, the (power-consuming) cable passes through the second gland 93, which is then tightened. At this point, the (power-consuming) cable is sealed and fixed to the second gland 93. Afterward, the (power-consuming) cable is stripped to expose multiple wire cores. These multiple wire cores pass through the conical protective sleeve 92 and are inserted into the heads of multiple second pins 22. The multiple wire cores in the (power-consuming) cable are electrically connected to the multiple second pins 22 on the plug 2.

[0070] In one possible implementation, the outer wall of the connecting sleeve 3 is provided with a first external thread 35 located above the positioning ring 33, and the inner wall of the first sealing ring 4 is provided with a first internal thread 42 that matches the first external thread 35. The first sealing ring 4 is threadedly connected to the upper side of the connecting sleeve 3 via the first external thread 35 and the first internal thread 42. The outer wall of the connecting sleeve 3 is provided with a second external thread 36 located below the positioning ring 33, and the anti-reverse ring 34 is located at the second external thread 36. The inner wall of the second sealing ring 91 is provided with a second internal thread 911 that matches the second external thread 36, and the second sealing ring 91 is threadedly connected to the lower side of the connecting sleeve 3 via the second external thread 36 and the second internal thread 911. The connecting sleeve 3 and the first sealing ring 4 are threadedly connected via the first external thread 35 and the first internal thread 42. The connecting sleeve 3 and the second sealing ring 91 are threadedly connected via the second external thread 36 and the second internal thread 911. The connecting sleeve 3, the first external thread 35, and the second external thread 36 are integrally formed.

[0071] In one possible implementation, the connector 6 has multiple annularly distributed wiring holes 61. A first gland 62, communicating with the wiring holes 61, is fixedly mounted on the connector 6. The first gland 62 is fixed to the connector 6 via a tapered connecting sleeve. A clamp 63 is fixedly mounted at the other end of the protective sleeve 5, and the connector 6 is fixedly connected to the clamp 63. A flexible sealing sleeve 64 is fixedly mounted on the outer side of the connector 6, located between the wiring holes 61 and the clamp 63. The structure of the second gland 93 is prior art and will not be described in detail here. The flexible sealing sleeve 64 is made of rubber and is a hollow circular sleeve. The connector 6 has an I-shaped cross-section.

[0072] Generally, the number of first pins 13, second pins 22, and wiring holes 61 are the same. In this embodiment, the number of wiring holes 61 is greater than four, merely as an illustration to show that the number of wiring holes 61 can be set as needed.

[0073] The flexible sealing sleeve 64 prevents moisture and corrosive media from seeping into the interior of the protective sleeve 5 from between the connector 6 and the clamp 63.

[0074] The first gland 62 provides a sealed protection for the (power end) cable. Specifically, the (power end) cable is stripped to expose multiple wire cores. The outer sheath and multiple wire cores of the (power end) cable pass through the first gland 62, which is then tightened. At this point, the (power end) cable is sealed and fixed to the first gland 62. The connector 6 is then fixed to the other end of the protective sleeve 5 by the clamp 63. Afterward, the multiple wire cores of the (power end) cable pass through multiple wiring holes 61 and the inside of the protective sleeve 5, and are inserted into the heads of multiple first pins 13 on the terminal 1. The multiple wire cores in the (power end) cable are electrically connected to the multiple first pins 13 on the terminal 1.

[0075] In one possible implementation, the clamp 63 includes a first semicircular seat 631 and a second semicircular seat 632. The first semicircular seat 631 is fixedly disposed at the other end of the protective sleeve 5, and the second semicircular seat 632 is detachably disposed on the first semicircular seat 631. The connector 6 is fixedly connected between the first semicircular seat 631 and the second semicircular seat 632, and the flexible sealing sleeve 64 is located between the wiring hole 61 and the first semicircular seat 631 and the second semicircular seat 632. The fixed connection of the first semicircular seat 631 and the second semicircular seat 632 fixes the connector 6 between them, ultimately fixing the connector 6 to the other end of the protective sleeve 5.

[0076] Preferably, both the first semicircular seat 631 and the second semicircular seat 632 are provided with connecting holes, and the connecting holes on the first semicircular seat 631 and the second semicircular seat 632 are connected and disassembled by a third bolt and nut.

[0077] The process of using quick-connect couplings for multi-core cables:

[0078] First, plug 2 is inserted and fixed to the lower part of positioning strip 32 via second positioning groove 21 and positioning strip 32 (plug 2 is inserted from the right side of connecting sleeve 3), and positioning strip 32 defines the position of plug 2. Then, terminal 1 is inserted and fixed to the upper part of positioning strip 32 via first positioning groove 11 and positioning strip 32 (terminal 1 continues to be inserted from the right side of connecting sleeve 3), and plug 2 defines the position of terminal 1. Finally, both terminal 1 and plug 2 are fixed inside connecting sleeve 3. The tail of each second pin 22 is inserted into the power hole 12, and the second pin 22 is electrically connected to the first pin 13 and the power hole 12.

[0079] The first sealing ring 4 is inserted into the protective sleeve 5 from the right side, and at the same time the inner flange 41 contacts the outer flange 511. The other end of the first sealing ring 4 is threaded to the upper side of the connecting sleeve 3. At this time, the first sealing ring 4 contacts the positioning ring 33. The outer diameter of the protective sleeve 5 is the same as the outer diameter of the connecting sleeve 3. One end of the protective sleeve 5 is pressed against the top of the connecting sleeve 3. The protective sleeve 5 covers the upper part of the terminal 1.

[0080] The (power end) cable is stripped to expose multiple wire cores. The outer sheath and multiple wire cores of the (power end) cable pass through the first gland 62, which is then tightened. At this point, the (power end) cable is sealed and fixed to the first gland 62. The connector 6 is then fixed to the other end of the protective sleeve 5 via the clamp 63. Afterward, the multiple wire cores of the (power end) cable pass through multiple wiring holes 61 and the inside of the protective sleeve 5, and are inserted into the heads of multiple first pins 13 on the terminal 1. The multiple wire cores in the (power end) cable are electrically connected to the multiple first pins 13 on the terminal 1.

[0081] The first sealing shell 7 is fitted onto the connecting sleeve 3 from the left side, and the limiting flange 71 contacts the positioning ring 33, thus limiting the movement of the connecting sleeve 3. The second sealing shell 8 is fitted onto the protective sleeve 5 from the right side of the connecting sleeve 3. The first sealing shell 7 and the second sealing shell 8 are threaded together by the sealing external thread 72 and the sealing internal thread 81. At this time, the first sealing shell 7 and the second sealing shell 8 are fixedly connected, and the first sealing shell 7 is fixed to the outside of the connecting sleeve 3 and the first sealing ring 4, while the second sealing shell 8 is fixed to the protective sleeve 5. The flexible sealing ring 821 contacts the protective sleeve 5.

[0082] The second sealing ring 91 is threaded onto the lower side of the connecting sleeve 3. The second sealing ring 91 contacts the anti-reverse ring 34, and the anti-reverse ring 34 and the second sealing ring 91 limit each other. At this time, the heads of the multiple second pins 22 protrude from the outside of the connecting sleeve 3 and are located in the conical protective sleeve 92.

[0083] The (power supply) cable passes through the second gland 93, which is then tightened. At this point, the (power supply) cable is sealed and fixed to the second gland 93. After that, the (power supply) cable is stripped to expose multiple wire cores. These multiple wire cores pass through the conical protective sleeve 92 and are then inserted into the heads of multiple second pins 22. The multiple wire cores in the (power supply) cable are electrically connected to the multiple second pins 22 on the plug 2.

[0084] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A quick-connect connector for multi-core cables, characterized in that, The device includes a terminal (1), a plug (2), a connecting sleeve (3), a first sealing ring (4), a protective sleeve (5), and a connector (6). The terminal (1) and the plug (2) are electrically connected and both are detachably disposed inside the connecting sleeve (3). The ends of the terminal (1) and the plug (2) extend to the outside of the connecting sleeve (3). One end of the first sealing ring (4) is detachably connected to one end of the protective sleeve (5), and the other end of the first sealing ring (4) is detachably disposed on the upper side of the outside of the connecting sleeve (3). One end of the protective sleeve (5) is pressed against the connecting sleeve (3) and the protective sleeve (5) covers the end of the terminal (1). The other end of the protective sleeve (5) is detachably connected to the connector (6). A first sealing element is also detachably installed on the upper side of the outside of the connecting sleeve (3). The first sealing element covers the first sealing ring (4) and the protective sleeve (5). A second sealing element (9) is detachably installed on the lower side of the outside of the connecting sleeve (3). The second sealing element (9) covers the end of the plug (2).

2. The quick-connect device for multi-core cables according to claim 1, characterized in that, The connecting sleeve (3) is fixedly provided with a positioning inner boss (31) and a positioning strip (32). The positioning inner boss (31) is located on the side of the positioning strip (32). The terminal (1) is provided with a first positioning groove (11) that matches the positioning strip (32). The plug (2) is provided with a second positioning groove (21) that matches the positioning strip (32). The second positioning groove (21) is engaged in the lower part of the positioning strip (32) and the bottom of the plug (2) is in contact with the positioning inner boss (31). The first positioning groove (11) is engaged in the upper part of the positioning strip (32) and the bottom of the terminal (1) is in contact with the top of the plug (2).

3. The quick-connect device for multi-core cables according to claim 2, characterized in that, The terminal (1) has a structure that is narrow at the top and wide at the bottom. The first positioning groove (11) is located at the lower part of the terminal (1). The upper part of the terminal (1) extends to the outside of the connecting sleeve (3). A plurality of power-conducting holes (12) are arranged in a ring on the terminal (1). A first pin (13) is fixedly arranged in each power-conducting hole (12). The head of each first pin (13) extends to the outside of the power-conducting hole (12). A plurality of second pins (22) are arranged in a ring on the plug (2). The tail of each second pin (22) is inserted into the power-conducting hole (12). The head of each second pin (22) extends to the outside of the connecting sleeve (3).

4. The quick-connect device for multi-core cables according to claim 3, characterized in that, One end of the first sealing ring (4) is fixedly provided with an inner flange (41), and one end of the protective sleeve (5) is fixedly provided with an outer flange (511). One end of the first sealing ring (4) is sleeved on one end of the protective sleeve (5) and the inner flange (41) is in contact with the outer flange (511). The other end of the first sealing ring (4) is threaded on the upper side of the connecting sleeve (3). A positioning ring (33) is fixedly provided on the outside of the connecting sleeve (3) and the first sealing ring (4) is in contact with the positioning ring (33). The protective sleeve (5) covers the upper part of the terminal (1).

5. The quick-connect device for multi-core cables according to claim 4, characterized in that, The first sealing element includes a first sealing shell (7) and a second sealing shell (8). The first sealing shell (7) is sleeved on the outside of the connecting sleeve (3) and the first sealing ring (4). A limiting flange (71) is fixedly provided at the bottom of the first sealing shell (7) and the limiting flange (71) is in contact with the positioning ring (33). A sealing external thread (72) is provided at the top of the first sealing shell (7). The second sealing shell (8) is sleeved on the outside of the protective sleeve (5). A sealing internal thread (81) matching the sealing external thread (72) is provided at the bottom of the second sealing shell (8). The top of the first sealing shell (7) and the bottom of the second sealing shell (8) are threadedly connected by the sealing external thread (72) and the sealing internal thread (81). A flexible sealing ring (821) is fixedly provided at the top of the second sealing shell (8) and the flexible sealing ring (821) is in contact with the protective sleeve (5).

6. The quick-connect device for multi-core cables according to claim 5, characterized in that, The first sealing shell (7) is provided with a plurality of heat dissipation holes (73) evenly, and each heat dissipation hole (73) is fixedly provided with an intercepting membrane; the second sealing shell (8) is provided with a plurality of heat dissipation blind grooves (83) evenly.

7. The quick-connect device for multi-core cables according to claim 4, characterized in that, The second sealing element (9) includes a second sealing ring (91), a conical protective sleeve (92), and a second gland (93). The second sealing ring (91) and the second gland (93) are fixedly disposed at both ends of the conical protective sleeve (92) and communicate with it. The second sealing ring (91) is threaded on the lower side of the outside of the connecting sleeve (3). A backstop ring (34) is fixedly disposed on the lower side of the outside of the connecting sleeve (3) and the backstop ring (34) is located below the positioning ring (33). The second sealing ring (91) is in contact with the backstop ring (34). The head of each second pin (22) extends out to the outside of the connecting sleeve (3) and is located in the conical protective sleeve (92).

8. The quick-connect device for multi-core cables according to claim 7, characterized in that, The outer wall of the connecting sleeve (3) is provided with a first external thread (35) above the positioning ring (33), and the inner wall of the first sealing ring (4) is provided with a first internal thread (42) that matches the first external thread (35). The first sealing ring (4) is threadedly connected to the upper side of the connecting sleeve (3) through the first external thread (35) and the first internal thread (42). The outer wall of the connecting sleeve (3) is provided with a second external thread (36) below the positioning ring (33), and the anti-reverse ring (34) is located at the second external thread (36). The inner wall of the second sealing ring (91) is provided with a second internal thread (911) that matches the second external thread (36). The second sealing ring (91) is threadedly connected to the lower side of the connecting sleeve (3) through the second external thread (36) and the second internal thread (911).

9. The quick-connect device for multi-core cables according to claim 4, characterized in that, The connector (6) is provided with a plurality of wiring holes (61) arranged in a ring. A first gland (62) communicating with the plurality of wiring holes (61) is fixedly provided on the connector (6). A clamp (63) is fixedly provided at the other end of the protective sleeve (5). The connector (6) is fixedly connected to the clamp (63). A flexible sealing sleeve (64) is fixedly provided on the outside of the connector (6). The flexible sealing sleeve (64) is located between the wiring hole (61) and the clamp (63).

10. The quick-connect connector for multi-core cables according to claim 9, characterized in that, The clamp (63) includes a first semicircular seat (631) and a second semicircular seat (632). The first semicircular seat (631) is fixedly disposed at the other end of the protective sleeve (5). The second semicircular seat (632) is detachably disposed on the first semicircular seat (631). The connector (6) is fixedly connected between the first semicircular seat (631) and the second semicircular seat (632). The flexible sealing sleeve (64) is located between the wiring hole (61) and the first semicircular seat (631) and the second semicircular seat (632).

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