A cable connection device

Abstract

This invention belongs to the field of power engineering technology, specifically a cable connection device, including a housing; a fastening nut is threaded onto the outer surface of the housing; a compression ring is provided between the fastening nut and the housing; a cable body is provided inside the compression ring; the cable body includes a protective sleeve, a support ring, and a conductor. In this invention, the entire contact interface between the conductor and the connection substrate can be directly flushed and wetted by coolant, thereby completely solving the problem of localized overheating caused by incomplete coverage, ensuring the uniformity of temperature distribution at the connection point, and significantly improving connection safety and equipment reliability. Through the above-mentioned efficient and comprehensive cooling, the risk of accelerated aging of insulation materials, thermal breakdown, and short-circuit faults caused by overheating at the conductor connection point is fundamentally reduced. This not only ensures the immediate safety of the cable connection but also extends the service life of the connection device, providing a solid technical guarantee for the long-term stable operation of the entire power system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric power engineering, in particular to a cable connecting device. BACKGROUND

[0002] With the rapid development of the communication industry, the application of optical fiber cables and wire cables is increasing, and the application of cable connectors is also becoming more and more widespread. It is a key product to ensure the correctness and reliability of electrical signal transmission. In the assembly process of the cable connector, in order to ensure product quality, a number of effective quality control measures should be taken at each link. The selection, pretreatment, crimping or welding, detection and other processes of the cable connector should be strictly controlled. If the quality of assembly is a problem, such as: ground wire fracture, cable connector shell short circuit, cable connector poor contact or poor termination, etc. Fault phenomenon will inevitably seriously affect the reliability of the whole machine and system of electronic products. Therefore, in the actual assembly production process, the quality requirements of the cable connector and the assembly process method become particularly important.

[0003] A liquid-cooled cable connecting device is disclosed in Chinese Patent No. 202322408802.3, which comprises a base body and a shell. The base body includes a first electrical connection part and a second electrical connection part. The shell has a receiving cavity with a first opening and a second opening. The first opening is for inserting a liquid-cooled cable, and the second opening is connected to the first electrical connection part. The first opening is connected to a first fastening nut. The liquid-cooled cable is electrically connected to the first electrical connection part after passing through the first fastening nut and the first opening. The shell has a liquid outlet hole that is in communication with the receiving cavity and forms a cooling flow channel. The liquid-cooled solution flows into the receiving cavity through the liquid-cooled cable and then flows from the receiving cavity to the cooling flow channel, achieving liquid-cooled cooling. The cooling liquid outside the shell can be introduced into the cooling pipeline through the liquid outlet hole. When the interface overheats, the cooling liquid can effectively reduce the risk of short circuit accidents of the cable connector.

[0004] In the prior art, in order to solve the heat dissipation problem of the cable connection, a liquid cooling method is usually used. This method circulates the cooling liquid near the connection part to take away the heat generated by convection heat exchange. However, this technical solution has a significant defect: due to the limitation of structural design, the cooling liquid flow channel often cannot fully contact and uniformly cover all the heat generating surfaces of the cable connection, resulting in the formation of a cooling blind area in the corners, gaps and other areas of the connector. These areas not effectively covered become local hot spots where heat accumulates, resulting in low overall cooling efficiency and extremely uneven temperature distribution. Therefore, even if liquid cooling is used, there is still a risk of local overheating at the cable connection, which can accelerate the aging of the insulation material and even cause thermal breakdown and short circuit failure, posing a serious threat to the safe and stable operation of the power system. Therefore, a cable connection device is designed to solve the above problems. SUMMARY

[0005] In order to make up for the shortcomings of the prior art, the present application provides a cable connection device. The present application is mainly used to solve the problem of incomplete coverage of the cable connection in the prior art, resulting in low cooling efficiency of the cable connection and the problem of overheating and short circuit.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a cable connection device, comprising a shell; the shell is externally threaded connected with a fastening nut; an extrusion ring is arranged between the fastening nut and the shell; a cable main body is arranged in the extrusion ring; the cable main body comprises a protective sleeve, a support ring and a conductor; the support ring is installed on the inner wall of the protective sleeve; the support ring is arranged outside the conductor; a cooling channel is formed between the support ring and the conductor; a connecting seat is internally threaded installed in the shell; a threaded compression nut is externally threaded connected with the connecting seat; a liquid outlet pipe is arranged in the threaded compression nut; a gasket is arranged between the liquid outlet pipe and the connecting seat; the shell is communicated between the connecting seat, the gasket and the liquid outlet pipe; a connecting base is threadedly connected to the inner wall of the shell; the conductor is inserted into the connecting base and electrically connected with the connecting base; an annular groove is formed in the left end of the conductor connecting base; four guide grooves are formed between the inner wall of the connecting base and the annular groove; the end of the connecting base is inserted between the support ring and the conductor; the side of the guide groove away from the support ring is located in the annular groove; a sealing ring is arranged between the connecting base and the shell.

[0007] The side of the guide groove away from the support ring is provided with an inclined surface.

[0008] An activity ring is arranged in the annular groove; four flow guide holes are formed in the activity ring; the flow guide holes are inclined in the circumferential direction; a spiral groove is formed in the inner wall of the activity ring; a middle hole is formed in the right end of the activity ring.

[0009] The movable ring is made of shape memory alloy; when the temperature reaches or exceeds the phase transformation temperature, the movable ring can produce axial elongation and radial expansion.

[0010] The cross-sectional shape of the spiral groove is set to be an arc.

[0011] A magnetic block is installed at the right end of the movable ring, between two adjacent intermediate holes; a magnetic component is installed in the connecting base at the position corresponding to the magnetic block.

[0012] The magnetic component includes an electromagnet; the electromagnet is installed in the connecting base; a Hall sensor group is installed on the side of the connecting base corresponding to the position of the uppermost electromagnet; the Hall sensor group includes a first Hall sensor and a second Hall sensor; the first Hall sensor is located behind the electromagnet; the second Hall sensor is located in front of the electromagnet; a temperature sensor is connected through the housing.

[0013] A notch is provided on the outside of the extrusion ring.

[0014] The sealing ring includes a metal sheet and a rubber layer coated on the outside of the metal sheet, and the rubber layer is uniformly thick and wraps around the outside of the metal sheet; the sealing ring and the metal sheet have a wavy cross-sectional shape when not compressed; the sealing ring and the metal sheet include at least two crests.

[0015] The hardness range of the extrusion ring is Shore A 70-90.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. In this invention, by setting an annular groove around the contact area between the conductor and the substrate on the connecting base and constructing a closed coolant flow channel, it is ensured that the coolant can fully and comprehensively exchange heat with the core heat-generating area. This design directly guides the cooling medium to the source of heat generation, avoiding ineffective energy dissipation, resulting in extremely high cooling efficiency, effectively eliminating local hot spots, and ensuring uniform temperature. Unlike existing solutions with cooling blind spots, the full-coverage annular groove design of this invention allows the entire contact interface between the conductor and the connecting base to be directly flushed and wetted by the coolant, thereby completely solving the problem of local overheating caused by incomplete coverage, ensuring the uniformity of temperature distribution at the connection point, and significantly improving connection safety and equipment reliability. Through the above-mentioned efficient and comprehensive cooling, the risk of accelerated aging of insulation materials, thermal breakdown, and short-circuit faults caused by overheating at the conductor connection is fundamentally reduced. This not only ensures the immediate safety of the cable connection but also extends the service life of the connection device, providing a solid technical guarantee for the long-term stable operation of the entire power system.

[0018] 2. In this invention, the kinetic energy of the coolant itself is utilized. When the coolant flows through the inclined guide hole of the movable ring, the resulting jet reaction force drives the movable ring and its spiral groove to rotate at high speed. This design requires no additional power source; the core component can be driven solely by the fluid itself. The high-speed rotating movable ring and its spiral groove act like a miniature stirring pump, powerfully agitating the coolant in the annular groove and forcibly transporting it to the traditional dead zone deep within the annular groove. This dynamic and forced convection heat transfer method ensures that the coolant can fully and uniformly exchange heat with the entire contact surface of the conductor and the connecting substrate, fundamentally solving the problem of local overheating caused by incomplete coverage in static cooling. Through the aforementioned active turbulence mechanism, the turbulence intensity and heat transfer coefficient of the coolant are greatly enhanced, thereby significantly improving the overall cooling efficiency. This effectively ensures that the operating temperature of the conductor connection point is maintained within a safe range, significantly reducing the risk of short circuits and insulation aging caused by overheating, and qualitatively improving the safety and long-term operational reliability of the cable connection device.

[0019] 3. In this invention, the movable ring is made of shape memory alloy material, and its geometric dimensions undergo predictable deformation with changes in coolant temperature. This design cleverly transforms temperature signals into a physical response of the mechanical structure, constructing a fully adaptive intelligent cooling system that requires no external control. Radial adaptive expansion: When the temperature rises abnormally, the radial expansion of the movable ring increases its internal flow channel volume, thereby allowing more coolant to enter the core heating area, directly increasing the cooling "capacity." Simultaneously, the axial elongation of the movable ring increases the effective lead of the spiral groove, meaning that in... At the same rotational speed, it pumps coolant more efficiently, delivering the low-temperature coolant to the depths of the annular groove more quickly, thus increasing the cooling "rate". The two adaptive effects mentioned above form an ideal positive feedback regulation loop: the higher the temperature, the more significant the deformation of the moving ring, and the greater the flow rate and speed of the cooling system, thereby strengthening the ability to suppress high temperatures. This "the hotter, the stronger the cooling" on-demand cooling mode can proactively and quickly respond to sudden high-temperature conditions, fundamentally avoiding heat accumulation and thermal runaway caused by lag in cooling capacity, and providing essential safety assurance for cable connections.

[0020] 4. In this invention, based on the rotation of the movable ring relying on fluid kinetic energy, the system uses a Hall sensor and a magnetic block for precise positioning to monitor its rotational phase in real time. The controller, based on the phase signal, instantaneously energizes the movable ring at the optimal moment when the magnetic block approaches the electromagnet, using electromagnetic attraction to apply a precise, same-direction assist torque to the rotating ring, thus intelligently increasing its rotational speed. This process employs an intermittent energizing strategy, achieving acceleration while minimizing energy consumption. The system possesses two levels of adaptive control capability. When the temperature sensor detects a high temperature threshold (Level 1), the aforementioned electromagnetic assistance is activated, achieving the first leap in cooling capacity. If the temperature continues to rise to the Level 2 threshold, the controller will... The automatic increase in the electromagnet's operating current generates a stronger magnetic force, thereby providing a more powerful assist torque to the moving coil, further increasing its rotational speed and achieving a secondary leap in cooling capacity. It also provides active and scalable safety assurance: through the aforementioned graded electromagnetic assistance, this device can actively and rapidly increase the flow rate of the coolant within the annular groove according to the severity of overheating, forming powerful forced convection. This "on-demand enhancement" cooling strategy not only effectively copes with conventional high temperatures but also handles extreme thermal shock conditions with ease, fundamentally suppressing thermal runaway and constructing a reliable active safety barrier for the cable connection device, greatly improving the system's robustness and safety. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the connecting substrate in this invention;

[0024] Figure 3 This is a three-dimensional cross-sectional structural diagram of the outer shell in this invention;

[0025] Figure 4 This is the present invention. Figure 3 Enlarged structural diagram of part A in the middle;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the connecting substrate in this invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the movable ring in this invention;

[0028] Figure 7 This is a schematic diagram of the side cross-sectional structure of the movable ring in this invention;

[0029] Figure 8 This is a schematic diagram of the frontal cross-sectional structure of the present invention;

[0030] Figure 9 This is a schematic cross-sectional view of the separation of the outer shell and the connecting substrate in this invention;

[0031] Figure 10 This is the present invention. Figure 9 Enlarged structural diagram of section B;

[0032] In the diagram: 1. Outer shell; 2. Fastening nut; 3. Extrusion ring; 4. Cable body; 401. Protective sleeve; 402. Support ring; 403. Conductor; 5. Connecting seat; 6. Threaded cap; 7. Liquid outlet pipe; 8. Connecting base; 9. Annular groove; 10. Guide groove; 11. Movable ring; 12. Flow guide hole; 13. Spiral groove; 14. Central hole; 15. Magnetic block; 16. Magnetic component; 17. Hall sensor group; 18. Temperature sensor; 19. Notch; 20. Sealing ring. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 10 As shown, a cable connection device includes a housing 1; a fastening nut 2 is threaded onto the outer side of the housing 1; a compression ring 3 is provided between the fastening nut 2 and the housing 1; a cable body 4 is provided inside the compression ring 3; the cable body 4 includes a protective sleeve 401, a support ring 402, and a conductor 403; the support ring 402 is installed on the inner wall of the protective sleeve 401; the support ring 402 is located outside the conductor 403; a cooling channel is formed between the support ring 402 and the conductor 403; a connecting seat 5 is threaded onto the inner side of the housing 1; a threaded cap 6 is threaded onto the outer side of the connecting seat 5; a liquid outlet pipe 7 is provided inside the threaded cap 6; the liquid outlet pipe 7... A gasket is provided between the connecting seat 5 and the outer shell 1; the outer shell 1 is connected to the liquid outlet pipe 7 through the connecting seat 5 and the gasket; the inner wall of the outer shell 1 is threaded with a connecting base 8; the conductor 403 is inserted into the connecting base 8 and is electrically connected to the connecting base 8; the left end of the conductor 403 connected to the connecting base 8 has an annular groove 9; four guide grooves 10 are provided between the inner wall of the connecting base 8 and the annular groove 9; the end of the connecting base 8 is inserted between the support ring 402 and the conductor 403; the side of the guide groove 10 away from the support ring 402 is located in the annular groove 9; a sealing ring 20 is provided between the connecting base 8 and the outer shell 1.

[0035] First, the connecting base 8 is rotated and installed on the outer shell 1. Then, the threaded cap 6 is fitted over the cable body 4, and the conductor 403 is inserted into the connecting base 8. The threaded cap 6 is then rotated and installed on the outer shell 1, thus completing the installation process of the cable body 4. When the cable body 4 is connected and the contact part between the conductor 403 and the connecting base 8 becomes hot and needs cooling, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. The coolant then flows into the annular groove 9 through the cooling channel and guide groove 10 between the support ring 402 and the conductor 403. Since the size of the annular groove 9 covers the area around the contact part between the conductor 403 and the connecting base 8, the coolant can efficiently absorb the heat generated by the contact part between the conductor 403 and the connecting base 8. The cooled coolant then flows out from the annular groove 9 and through the connecting seat 5 and the outlet pipe 7, thereby achieving efficient cooling of the contact part between the conductor 403 and the connecting base 8. This reduces the probability of overheating and short circuit at the contact part between the conductor 403 and the connecting base 8, thus ensuring the safety of the cable connection.

[0036] like Figures 2 to 4 As shown, the side of the guide groove 10 away from the support ring 402 is set as an inclined surface.

[0037] Since a portion of the connecting base 8 is inserted between the support ring 402 and the conductor 403, and the cooling channel is connected to the annular groove 9 and the interior of the outer casing 1 through the guide groove 10, the inclined guide groove 10 guides most of the coolant into the annular groove 9 along the inclined surface. This allows the low-temperature coolant to smoothly enter the annular groove 9 and cover the contact portion between the conductor 403 and the connecting base 8, thereby increasing the amount of low-temperature coolant entering the annular groove 9 and improving the cooling efficiency of the contact portion between the conductor 403 and the connecting base 8.

[0038] like Figure 4 , Figures 6 to 7 As shown, a movable ring 11 is provided in the annular groove 9; four guide holes 12 are provided in the movable ring 11; the guide holes 12 are inclined in the circumferential direction; a spiral groove 13 is provided on the inner wall of the movable ring 11; and a central hole 14 is provided at the right end of the movable ring 11.

[0039] When cooling the contact area between conductor 403 and connecting substrate 8, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. At this time, the coolant flows into the annular groove 9 through the cooling channel and guide groove 10 between the support ring 402 and conductor 403. Simultaneously, the coolant rushing into the annular groove 9 along the inclined surface of the guide groove 10 has a certain inclination angle, so that the coolant can smoothly impact the inner wall of the movable ring 11 and enter the guide hole 12. The coolant is sprayed out from these circumferentially inclined guide holes 12, and the resulting recoil force constitutes a driving torque, driving the movable ring 11 to rotate. This causes the spiral groove 13 on the movable ring 11 to rotate, carrying the coolant smoothly into the annular groove 9. The coolant flows from the deepest part of the annular groove 9 into the outer side of the movable ring 11 through the central hole 14, and finally flows out of the annular groove 9 from the outer side of the movable ring 11. In this scheme, the combined force of the recoil generated by the coolant spraying out from these circumferentially inclined guide holes 12 forms a driving torque, which makes the movable ring 11 and the spiral groove 13 rotate. The spiral groove 13 then delivers the coolant to the deepest part of the annular groove 9, so that the coolant flow process fully and accurately covers the contact part between the conductor 403 and the connecting base 8, thereby ensuring the cooling efficiency of the contact part between the conductor 403 and the connecting base 8, thus avoiding overheating and short circuit, and thus improving the safety performance of the connecting device.

[0040] The movable ring 11 is made of shape memory alloy; when the temperature reaches or exceeds the phase transformation temperature, the movable ring 11 can produce axial elongation and radial expansion.

[0041] The shape memory alloy used in the active ring 11 is specifically a titanium-nickel alloy.

[0042] When cooling the contact area between conductor 403 and connecting base 8, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. The coolant flows into the annular groove 9 through the cooling channel and guide groove 10 between the support ring 402 and conductor 403. After absorbing heat, the heated coolant is discharged through the outlet pipe 7, completing the cooling of the contact area between conductor 403 and connecting base 8. If high temperatures occur during cooling, the excessively high temperature of the coolant itself heats the movable ring 11, causing it to elongate axially and increase radially. This radial expansion increases the internal space of the movable ring 11, allowing more coolant to enter and thus increasing the contact area between conductor 403 and connecting base 8, thereby increasing the cooling efficiency of the contact area. The efficiency of cooling the contact portion of the conductor 403 and the connecting base 8 is improved. Due to the axial elongation of the movable ring 11, the spiral groove 13 is stretched, allowing the coolant to be delivered to the depth of the annular groove 9 more quickly per revolution compared to the movable ring 11 without axial elongation. This enables the coolant to flow more rapidly into the depth of the annular groove 9, achieving rapid cooling of the contact portion between the conductor 403 and the connecting base 8. In this scheme, the high temperature of the coolant is used to automatically control the axial elongation and radial enlargement of the movable ring 11, increasing the amount of coolant entering the inner side of the movable ring 11 and allowing the coolant to enter the movable ring 11 quickly. This increases the cooling efficiency of the contact portion between the conductor 403 and the connecting base 8, increases the cooling speed under high temperature conditions, avoids short circuits due to continuous high temperature, and improves the safety performance of the connecting device.

[0043] like Figure 4 As shown, the cross-sectional shape of the spiral groove 13 is set to be an arc.

[0044] Because the spiral groove 13 has a circular arc cross-section and no sharp corners on its inner wall, there is no stress concentration. This allows the spiral groove 13 to smoothly and uniformly extend with the deformation of the movable ring 11 as it stretches axially, avoiding the risk of cracking or damage due to excessive local stress. This ensures the structural integrity and long-term reliability of the movable ring 11 under temperature changes. Simultaneously, the circular arc cross-section design reduces the frictional resistance of the coolant flowing within the spiral groove 13, making the coolant flow more smoothly, reducing energy loss, and further improving the pumping efficiency and agitation effect of the spiral groove 13. This ensures efficient circulation and heat exchange of the coolant under different temperature conditions.

[0045] like Figure 4 and Figure 6 As shown, a magnetic block 15 is installed at the right end of the movable ring 11, located between two adjacent intermediate holes 14; a magnetic component 16 is installed inside the connecting base 8 at the position corresponding to the magnetic block 15.

[0046] When cooling the contact area between conductor 403 and connecting substrate 8, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. At this time, the coolant flows into the annular groove 9 through the cooling channel and guide groove 10 between the support ring 402 and conductor 403. Simultaneously, the magnetic force between the magnetic block 15 and the magnetic component 16 acts on the movable ring 11, thereby keeping the movable ring 11 stable in the annular groove 9. This prevents the movable ring 11 from shaking and getting stuck in the annular groove 9, ensuring that the coolant can flow smoothly from the inside to the outside of the movable ring 11. This ensures the stable cooling process of the contact area between conductor 403 and connecting substrate 8, and thus ensures the efficiency of the cooling process.

[0047] like Figures 3 to 4 As shown, the magnetic component 16 includes an electromagnet; the electromagnet is installed inside the connecting base 8; a Hall sensor group 17 is installed on the side of the connecting base 8 corresponding to the position of the uppermost electromagnet; the Hall sensor group 17 includes a first Hall sensor and a second Hall sensor; the first Hall sensor is located behind the electromagnet; the second Hall sensor is located in front of the electromagnet; a temperature sensor 18 is connected through the housing 1.

[0048] When cooling the contact area between conductor 403 and connecting base 8, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. At this time, the coolant flows into the annular groove 9 through the cooling channel and guide groove 10 between the support ring 402 and conductor 403. Finally, the coolant that has absorbed heat and heated up is discharged through the outlet pipe 7, completing the cooling of the contact area between conductor 403 and connecting base 8. At this time, the movable ring 11 is axially elongated and radially enlarged, and the coolant flowing into the annular groove 9 and guide hole 12 drives the movable ring 11 to rotate clockwise. When the temperature sensor 18 detects that the internal temperature of the outer shell 1 is too high, the first Hall sensor detects the first distance between the gradually approaching magnetic block 15, and the second Hall sensor detects the second distance between the gradually moving magnetic block 15. Then, the controller determines that when the first distance is less than the second distance, the controller... When the electromagnet is energized, the magnetic force between the electromagnet and the nearby magnetic block 15 is greater than the magnetic force between the electromagnet and the distant magnetic block 15. Therefore, the magnetic force pulls on the movable coil 11, thereby assisting the clockwise rotation of the movable coil 11 and accelerating its rotation until the first Hall sensor detects that the position of the nearby magnetic block 15 is aligned with the position of the electromagnet. At this time, the electromagnet is de-energized. Then, when the first distance is less than the second distance again, the above process is repeated. Thus, by intermittently energizing the electromagnet, the movable coil 11 is intermittently assisted, thereby accelerating its rotation. This increases the flow rate of the coolant in the annular groove 9, and the rapid flow of coolant increases the cooling efficiency of the contact part between the conductor 403 and the connecting base 8, making the connecting device less prone to short circuit and burnout, thus ensuring the safety performance of the connecting device.

[0049] By energizing the electromagnet to accelerate the rotation of the movable coil 11, the cooling efficiency of the contact area between the conductor 403 and the connecting base 8 is increased. If the temperature sensor 18 still detects a high temperature, the current of the electromagnet is increased, thereby increasing the magnetic force between the electromagnet and the magnetic block 15. The magnetic force acting on the movable coil 11 is also increased. At this time, the magnetic force between the electromagnet and the magnetic block 15 causes the movable coil 11 to rotate faster, thereby further increasing the flow rate of the coolant, further increasing the cooling efficiency of the contact area between the conductor 403 and the connecting base 8, and further increasing the safety performance of the connection device.

[0050] like Figure 3 As shown, a notch 19 is provided on the outside of the extrusion ring 3.

[0051] The extrusion ring 3 is made of elastic material, and the notch 19 cut on its surface makes it easier to be extruded and deformed. This makes it easier for the extrusion ring 3 to adhere to the surface of the outer shell 1 when it is extruded, thereby increasing the sealing effect of the extrusion ring 3.

[0052] like Figures 8 to 10As shown, the sealing ring 20 includes a metal sheet and a rubber layer coated on the outside of the metal sheet, and the rubber layer is wrapped around the outside of the metal sheet with a uniform wall thickness; the cross-sectional shape of the sealing ring 20 and the metal sheet when not compressed is wavy; the sealing ring 20 and the metal sheet include at least two crests.

[0053] The metal wires inside the sealing ring 20 give it a certain strength, allowing it to deform and fit between the connecting base and the outer shell 1 after being compressed. The corrugated cross-section of the sealing ring 20 ensures that its wavy structure provides multiple sealing interfaces during compression. When the outer shell 1 is threaded tightly onto the connecting base 8, the wavy sealing ring 20 is axially compressed. The crests on both sides initially make close contact with the inner wall of the outer shell 1 and the outer wall of the connecting base 8, forming an initial seal. As the compression pressure increases, the troughs of the wavy shape are gradually compressed, allowing the material of the sealing ring 20 to more fully fill the tiny gaps between the outer shell 1 and the connecting base 8, further enhancing the sealing effect. Simultaneously, the supporting effect of the internal metal sheet prevents irreversible plastic deformation or breakage of the sealing ring 20 under excessive compression, ensuring the elastic recovery and sealing performance stability of the sealing ring 20 during long-term use. This design allows the sealing ring 20 to adapt to the slight displacement between the outer shell 1 and the connecting base 8 caused by processing errors or assembly stress, always maintaining a good sealing state. This effectively prevents coolant leakage from the connection between the outer shell 1 and the connecting base 8, ensuring the normal circulation of the cooling system and the overall sealing of the cable connection device.

[0054] The hardness range of the extrusion ring 3 is Shore A 70-90.

[0055] The hardness of the extrusion ring 3 is maintained at Shore A70-90. Specifically, it is made of neoprene rubber, which can deform and seal, so that the extrusion ring 3 fits tightly against the inner wall of the outer shell 1, thereby ensuring the sealing effect between the two. It can also provide high support and clamping force, so that the extrusion ring 3 is stably clamped outside the cable body 4 after being squeezed, thus providing a stable clamping force to the cable body 4, while preventing the extrusion ring 3 from being excessively deformed.

[0056] During operation, the connecting base 8 is first installed inside the housing 1 by rotating it with threads. Then, the threaded cap 6 is placed over the cable body 4, and the conductor 403 is inserted into the connecting base 8. The threaded cap 6 is then rotated to install it outside the housing 1. When the cable body 4 is connected and the contact area between the conductor 403 and the connecting base 8 becomes hot and requires cooling, the connecting pump connected to the left end of the cooling channel drives the coolant to flow. The coolant then flows into the annular groove 9 through the cooling channel between the support ring 402 and the conductor 403 and the guide groove 10. At the same time, the coolant flowing into the annular groove 9 along the inclined surface of the guide groove 10 has a certain angle of inclination. The angle of the flow allows the coolant to smoothly impact the guide holes 12 in the movable ring 11. Because the inclined coolant flowing out of the guide holes 12 along the circumferential direction creates a recoil force on the movable ring 11, the four inclined recoil forces drive the movable ring 11 to rotate. This causes the rotating movable ring 11 and the spiral groove 13 to carry the coolant smoothly into the deepest part of the annular groove 9. Furthermore, because the size of the annular groove 9 covers the area where the conductor 403 contacts the connecting base 8, the coolant can efficiently absorb the heat generated at the contact point between the conductor 403 and the connecting base 8. The cooled coolant then flows out from the annular groove 9... The coolant flows out of the groove 9, causing the movable ring 11 to elongate axially and increase in radial direction. The coolant flowing into the annular groove 9 and the guide hole 12 impacts the movable ring 11, causing it to rotate clockwise. When the temperature sensor 18 detects that the internal temperature of the outer casing 1 is too high, the first Hall sensor detects the first distance between the moving magnet 15 and the gradually approaching magnet 15, and the second Hall sensor detects the second distance between the moving magnet 15 and the gradually moving away magnet 15. The controller then determines that when the first distance is less than the second distance, it energizes the electromagnet. The magnetic force between the electromagnet and the approaching magnet 15 is greater than the magnetic force between the electromagnet and the moving magnet 15. Therefore, the magnetic force pulls on the movable coil 11, thereby assisting the rotation of the movable coil 11 and accelerating its rotation. When the first Hall sensor detects that the position of the magnetic block 15 is aligned with the position of the electromagnet, the electromagnet is de-energized. Then, when the first distance is less than the second distance again, the above process is repeated, thereby achieving intermittent energization of the electromagnet, thereby accelerating the rotation of the movable coil 11, thereby increasing the flow speed of the coolant in the annular groove 9, making the coolant flow rapidly. Finally, the coolant flows out through the connecting seat 5 and the outlet pipe 7, completing the cooling of the part of the conductor 403 in contact with the connecting base.

[0057] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A cable connection device, comprising a housing (1); characterized in that: The outer shell (1) is externally threaded with a fastening nut (2); a compression ring (3) is provided between the fastening nut (2) and the outer shell (1); a cable body (4) is provided inside the compression ring (3); the cable body (4) includes a protective sleeve (401), a support ring (402), and a conductor (403); the support ring (402) is installed on the inner wall of the protective sleeve (401); the support ring (402) is located outside the conductor (403); a cooling channel is formed between the support ring (402) and the conductor (403); a connecting seat (5) is internally threaded on the outer shell (1); a threaded cap (6) is externally threaded on the connecting seat (5); a liquid outlet pipe (7) is provided inside the threaded cap (6); the liquid outlet pipe (7) is connected to the connecting seat (5). A gasket is provided between the outer shell (1) and the liquid outlet pipe (7) through the connecting seat (5) and the gasket; a connecting base (8) is threadedly connected to the inner wall of the outer shell (1); the conductor (403) is inserted into the connecting base (8) and electrically connected to the connecting base (8); an annular groove (9) is provided at the left end of the conductor (403) connecting base (8); four guide grooves (10) are provided between the inner wall of the connecting base (8) and the annular groove (9); the end of the connecting base (8) is inserted between the support ring (402) and the conductor (403); the side of the guide groove (10) away from the support ring (402) is located in the annular groove (9); a sealing ring (20) is provided between the connecting base (8) and the outer shell (1). The side of the guide groove (10) away from the support ring (402) is set as an inclined surface; The annular groove (9) is provided with a movable ring (11); the movable ring (11) is provided with four guide holes (12); the guide holes (12) are inclined in the circumferential direction; the inner wall of the movable ring (11) is provided with a spiral groove (13); the right end of the movable ring (11) is provided with a middle hole (14). The movable ring (11) is made of shape memory alloy; the movable ring (11) can produce axial elongation and radial expansion when the temperature reaches or exceeds the phase transformation temperature.

2. The cable connection device according to claim 1, characterized in that: The cross-sectional shape of the spiral groove (13) is set to be an arc.

3. The cable connection device according to claim 2, characterized in that: A magnetic block (15) is installed at the right end of the movable ring (11) between two adjacent intermediate holes (14); a magnetic component (16) is installed in the connecting base (8) at the position corresponding to the magnetic block (15).

4. A cable connection device according to claim 3, characterized in that: The magnetic component (16) includes an electromagnet; the electromagnet is installed inside the connecting base (8); a Hall sensor group (17) is installed on the side of the connecting base (8) corresponding to the position of the uppermost electromagnet; the Hall sensor group (17) includes a first Hall sensor and a second Hall sensor; the first Hall sensor is located behind the electromagnet; the second Hall sensor is located in front of the electromagnet; a temperature sensor (18) is connected through the housing (1).

5. A cable connection device according to claim 1, characterized in that: The extrusion ring (3) has a notch (19) on its outside.

6. A cable connection device according to claim 1, characterized in that: The sealing ring (20) includes a metal sheet and a rubber layer coated on the outside of the metal sheet, and the rubber layer is wrapped around the outside of the metal sheet with a uniform wall thickness; the sealing ring (20) and the metal sheet have a wavy cross-sectional shape when not compressed; the sealing ring (20) and the metal sheet include at least two peaks.

7. A cable connection device according to claim 5, characterized in that: The hardness range of the extrusion ring (3) is Shore A 70-90.

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