Cable assembly

Abstract

The invention discloses a cable assembly, which belongs to the field of power equipment and comprises a cylindrical shell, a threaded opening is formed in the top wall of the shell, and a cover plate is mounted in the threaded opening in a threaded manner; insertion openings are formed in the two ends of the shell, and annular sealing rings are fixedly installed in the insertion openings and are made of rubber; sleeves with openings in the two ends are fixedly installed on the two end faces of the shell correspondingly. A sponge is fixedly installed on the inner wall of the sleeve, a through hole matched with a cable is formed in the side wall of the sponge, when impurities impact the sponge, kinetic energy of the impurities is converted into elastic potential energy of the sponge, at the moment, the impurities naturally fall onto the inner bottom wall of the sleeve, part of the impurities penetrate through the sponge, and in the process of penetrating through the sponge hole, the impurities are prevented from falling off. The impurities are in contact with the side walls of the holes in the sponge, so that the kinetic energy of the impurities can be reduced through the sponge; impurities fall downwards under the action of self gravity, and the number of the impurities entering a closed space between the sealing ring and the sponge is reduced.

Description

Technical Field

[0001] This invention relates to the field of power equipment, and more specifically, to a cable assembly. Background Technology

[0002] In fields such as consumer electronics, aerospace, electrical machinery, and new energy, the stable and reliable operation of power and communication cable assemblies is a core prerequisite for ensuring the normal operation of equipment and the efficient operation of systems.

[0003] The application scenarios in the above-mentioned fields are often accompanied by complex and harsh working conditions: outdoor equipment in the field of new energy (such as wind power and photovoltaic power stations) is exposed to harsh conditions such as strong winds, low temperatures and sandstorms for a long time.

[0004] Currently, although cable connectors widely used in various electronic and electrical equipment have basic connection and locking functions, their reliability faces severe challenges under the aforementioned dynamic load and abrasive complex working conditions.

[0005] Taking a typical operating condition of low temperature accompanied by vibration as an example, connectors installed inside equipment or outdoors will have their suspended cables continuously swaying and twisting under vibration loads, thus transmitting dynamic mechanical stress to the connector interface. For connectors with traditional locking structures such as threaded connections, their low-temperature environmental adaptability has a dual core defect: on the one hand, the elastic sealing ring material used in the connector sealing structure will exhibit an increase in elastic modulus and a significant decrease in resilience in low-temperature environments, resulting in a substantial decrease in sealing preload; on the other hand, in a continuous vibration environment, the interface is prone to slight relative rotation of the threaded pair, which can lead to loosening of the connection.

[0006] The combined effect of these two factors directly leads to a micro-gap causing axial separation between the connector plug and socket. Dust, grit, and other particulate matter from the external environment can penetrate the connector through this micro-gap with the air, causing abrasive wear on critical mechanical locking areas such as the threaded surfaces and the jaw engagement points. Over long-term operation, this abrasive wear drastically accelerates the physical wear of critical mating surfaces, causing a continuous decrease in the connector's mechanical locking force, ultimately leading to structural connection failure and resulting in significant safety and economic losses such as power outages and shutdowns of renewable energy power plants.

[0007] Therefore, a cable assembly is proposed. Summary of the Invention

[0008] To address the problems existing in the prior art, the purpose of this invention is to provide a cable assembly that can ensure a sealing effect and prevent wear on the connector of two cables.

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A cable assembly includes a cylindrical housing with a threaded opening on the top wall of the housing, and a cover plate threaded into the threaded opening. Both ends of the housing are provided with sockets, and a circular sealing ring made of rubber is fixedly installed in the sockets; First, pass the adjacent ends of the two cables to be connected through one of the sealing rings, so that the ends of the cables enter the housing. At this time, the sealing rings are tightly fitted with the cable sheath, preventing moisture from the external environment from entering the housing and coming into contact with the cable connection, thus preventing leakage. Then connect the adjacent ends of the cable together; Then install the cover plate at the opening of the housing to complete the connection of the two cables; Both ends of the housing are fixedly fitted with sleeves that are open at both ends, and the cable passes through the sleeves; A sponge is fixedly installed on the inner wall of the sleeve, and a through hole is opened on the side wall of the sponge to cooperate with the cable. The diameter of the through hole is smaller than the diameter of the cable. When installing the cable, the cable is passed through the sleeve and the through hole. At this time, the sponge surrounds the cable. As the airflow enters the sleeve, the impurities first come into contact with the sponge. When the impurities impact the sponge, their kinetic energy is converted into the elastic potential energy of the sponge. At this time, the impurities will naturally fall to the inner bottom wall of the sleeve. Some of the impurities pass through the sponge. During the process of passing through the sponge's pores, the impurities come into contact with the side walls of the pores on the sponge, thereby reducing the kinetic energy of the impurities through the sponge. The impurities then fall downwards under their own gravity. The inner diameter of the sleeve gradually increases as it moves away from the shell, so impurities that fall onto the inner wall of the sleeve can slide out automatically under the action of gravity. The sleeve has a cavity, and the side wall of the cavity has evenly spaced exhaust grooves. The exhaust grooves are inclined, and the gas discharged from the exhaust grooves impacts the sponge side wall. The housing is also equipped with an air supply mechanism for supplying air to the cavity.

[0011] Furthermore, the gas supply mechanism includes a pressurization chamber formed on the sealing ring, and the pressurization chamber is located below the cable. An air intake valve with its output end extending into the pressurization chamber is fixedly installed on the bottom wall of the housing, and an exhaust valve with its output end extending into the cavity is fixedly installed on the side wall of the pressurization chamber.

[0012] When strong winds cause the cable to vibrate, the outer casing shifts relative to the cable connector due to inertia, compressing the elastic sealing ring. This compression applies pressure to the gas in the pressurized chamber, forcing it into the cavity through the exhaust valve. Subsequently, the pressurized gas in the cavity is discharged through the exhaust channel, forming an airflow that passes through the sponge. This airflow effectively removes solid impurities accumulated in the sponge, thus preventing clogging.

[0013] This airflow removal mechanism also plays a crucial role in the sponge shaking process: it reduces the amount of impurities entering the sealed space between the "seal ring and sponge", which not only directly reduces the probability of impurities contacting the seal ring and causing wear, but also further improves the protective effect of the seal ring. This prevents impurities from entering the housing and improves the protection effect on the cable connection structure.

[0014] Furthermore, a filter screen is fixedly installed on the bottom wall of the housing, and the filter screen covers the surface of the intake valve.

[0015] During the air intake process, the pressurization chamber is ensured to draw in clean gas, which improves the cleaning effect on the coast.

[0016] By placing the filter screen on the bottom wall of the housing, the particles adhering to the surface of the filter screen can naturally fall off on windless days, thus preventing the filter screen from becoming clogged.

[0017] Furthermore, an elastic rope, which is in the shape of a ring, is fixedly installed on the side wall of the through hole.

[0018] By applying tension to the sponge with elastic cords, and ensuring that solid impurities in the air can only pass through the pores in the sponge before entering the space between the sponge and the sealing ring when the elastic cords are tightly wrapped around the cable surface, this effectively prevents wear on the sponge and thus guarantees its filtration effect.

[0019] Furthermore, a guide tube is fixedly installed on the end face of the shell. The guide tube is arc-shaped and its opening faces downward. An air hole is provided on the bottom wall of the guide tube, and the guide tube is located above the insertion port.

[0020] Furthermore, the exhaust valve is a three-way valve, with the first output end of the exhaust valve extending into the cavity and the second output end of the exhaust valve extending into the guide pipe.

[0021] When the pressurized chamber exhausts gas through the exhaust valve, some gas is discharged into the cavity, and the rest is discharged into the guide pipe. At this time, the guide pipe exhausts gas through the air hole. The gas discharged from the air hole impacts the top wall of the cable downward, thereby blowing away the impurities that fall on the top wall of the cable and reducing the probability of impurities entering the gap between the cable and the sealing ring.

[0022] Furthermore, an annular cavity is formed on the sealing ring, and the annular cavity is filled with helium gas.

[0023] Furthermore, a heat-conducting rod extending into the housing is inserted into the side wall of the annular cavity.

[0024] When heat is generated at the cable connector, the heat is transferred to the helium gas in the annular cavity through the heat-conducting rod, causing the helium gas to expand and the elastic sealing ring to fit tightly against the cable. This reduces the probability of solid impurities entering the gap between the sealing ring and the cable, further improving the protection effect on the cable connection structure.

[0025] Furthermore, the sleeve is made of stainless steel, and the inner wall of the sleeve is a smooth mirror surface. Therefore, when solid impurities fall onto the bottom wall of the sleeve, the friction force on the impurities is reduced, which ensures that the impurities can roll off the inner wall of the sleeve under their own gravity.

[0026] Furthermore, brushes are evenly fixed on the inner wall of each sleeve. When solid materials such as sand and gravel in the air enter the sleeve, some impurities are obstructed by the brushes, change their direction of movement, and fall naturally onto the bottom wall of the sleeve. A small number of impurities pass through the brushes and come into contact with the sponge, reducing the workload of the sponge. At the same time, when the impurities come into contact with the brushes, the kinetic energy of the impurities is converted into the internal energy of the brushes. When the impurities come into contact with the sponge, they prevent the impurities from penetrating the sponge or even passing through the sponge, further reducing the number of impurities entering the sealed space between the "sealing ring and sponge".

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This solution uses the cooperation of threaded holes, cover plates, sealing rings and sponges. As the airflow enters the sleeve, the impurities first come into contact with the sponge. When the impurities impact the sponge, the kinetic energy of the impurities is converted into the elastic potential energy of the sponge. At this time, the impurities will fall naturally to the inner bottom wall of the sleeve. Some of the impurities pass through the sponge. In the process of passing through the sponge holes, the impurities come into contact with the side walls of the holes on the sponge, thereby reducing the kinetic energy of the impurities through the sponge. The impurities fall downward under their own gravity, reducing the number of impurities entering the sealed space between the sealing ring and the sponge. This not only directly reduces the probability of impurities contacting the sealing ring and causing wear, but also further improves the protective effect of the sealing ring. This prevents impurities from entering the housing and improves the protection effect of the cable connection structure.

[0028] (2) This solution uses the cooperation of the guide pipe, the pressurizing chamber and the exhaust valve. When the pressurizing chamber exhausts gas through the exhaust valve, part of the gas is discharged into the cavity and the rest of the gas is discharged into the guide pipe. At this time, the guide pipe exhausts gas through the air hole. The gas discharged from the air hole impacts the top wall of the cable downward, thereby cleaning up the impurities that fall on the top wall of the cable, reducing the probability of impurities entering the gap between the cable and the sealing ring, and reducing the probability of the sealing ring wear.

[0029] (3) By placing the sponge between the brush and the sealing ring, when solid materials such as sand and gravel in the air enter the sleeve, some impurities are blocked by the brush and change their direction of movement, and will fall naturally onto the bottom wall of the sleeve. A small number of impurities pass through the brush and come into contact with the sponge, reducing the workload of the sponge. At the same time, when the impurities come into contact with the brush, the kinetic energy of the impurities is converted into the internal energy of the brush. When the impurities come into contact with the sponge, it prevents the impurities from penetrating the sponge or even passing through the sponge, further reducing the number of impurities entering the sealed space between the sealing ring and the sponge. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic cross-sectional view of the combined sleeve, cavity, and exhaust groove of the present invention; Figure 6 This is a cross-sectional view of the flow guide tube of the present invention.

[0031] Explanation of the labels in the diagram: 1. Shell; 2. Cover plate; 3. Sealing ring; 4. Sleeve; 5. Sponge; 6. Cavity; 7. Exhaust groove; 8. Pressurization chamber; 9. Inlet valve; 10. Exhaust valve; 11. Filter screen; 12. Elastic rope; 13. Guide tube; 14. Air hole; 15. Annular cavity; 16. Heat conducting rod; 17. Brush. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please see Figures 1 to 6 A cable assembly includes a cylindrical housing 1, a threaded opening on the top wall of the housing 1, and a cover plate 2 threadedly installed in the threaded opening; Both ends of the housing 1 are provided with sockets, and a circular sealing ring 3 is fixedly installed in the socket. The sealing ring 3 is made of rubber. First, pass the adjacent ends of the two cables to be connected through one of the sealing rings 3, so that the ends of the cables enter the housing 1. At this time, the sealing ring 3 is tightly fitted with the cable sheath, preventing moisture from the external environment from entering the housing 1 and contacting the cable connection, thus preventing leakage. Then connect the adjacent ends of the cable together; Then, install the cover plate 2 at the opening of the housing 1 to complete the connection of the two cables; Both ends of the housing 1 are fixedly fitted with sleeves 4 that are open at both ends, and the cable passes through the sleeves 4; A sponge 5 is fixedly installed on the inner wall of the sleeve 4, and a through hole for cooperating with the cable is opened on the side wall of the sponge 5. The diameter of the through hole is smaller than the diameter of the cable. When installing the cable, the cable is passed through the sleeve 4 and the through hole. At this time, the sponge 5 surrounds the cable. As the airflow enters the sleeve 4, the impurities first come into contact with the sponge 5. When the impurities impact the sponge 5, the kinetic energy of the impurities is converted into the elastic potential energy of the sponge 5. At this time, the impurities will naturally fall to the inner bottom wall of the sleeve 4. Some of the impurities pass through the sponge 5. During the process of passing through the holes of the sponge 5, the impurities come into contact with the side walls of the holes on the sponge 5, thereby reducing the kinetic energy of the impurities through the sponge 5, so that the impurities fall downward under their own gravity. The inner diameter of the sleeve 4 gradually increases as it moves away from the housing 1, so impurities that fall onto the inner wall of the sleeve 4 can slide out automatically under the action of gravity. The sleeve 4 has a cavity 6, and the side wall of the cavity 6 has evenly spaced exhaust grooves 7. The exhaust grooves 7 are inclined, and the gas discharged from the exhaust grooves 7 impacts the side wall of the sponge 5. The housing 1 is provided with an air supply mechanism for supplying air to the cavity 6.

[0034] The gas supply mechanism includes a pressurizing chamber 8 opened on the sealing ring 3, and the pressurizing chamber 8 is located below the cable. An air inlet valve 9 with its output end extending into the pressurizing chamber 8 is fixedly installed on the bottom wall of the housing 1, and an exhaust valve 10 with its output end extending into the cavity 6 is fixedly installed on the side wall of the pressurizing chamber 8.

[0035] When the cable vibrates due to strong winds, the outer casing 1 will shift relative to the cable connector due to inertia, compressing the elastic sealing ring 3. This compression action applies pressure to the gas in the pressurization chamber 8, forcing the gas to enter the cavity 6 through the exhaust valve 10. Subsequently, the pressurized gas in the cavity 6 is discharged through the exhaust groove 7, forming an airflow that passes through the sponge 5. This airflow can effectively blow away solid impurities accumulated in the sponge 5, thereby preventing the sponge 5 from becoming clogged.

[0036] This airflow removal mechanism also plays a crucial role during the vibration of the sponge 5: it reduces the amount of impurities entering the sealed space between the sealing ring 3 and the sponge 5, which not only directly reduces the probability of impurities contacting the sealing ring 3 and causing wear, but also further enhances the protective effect of the sealing ring 3, thereby preventing impurities from entering the housing 1 and improving the protection effect on the cable connection structure.

[0037] like Figure 4 As shown, a filter screen 11 is fixedly installed on the bottom wall of the housing 1, and the filter screen 11 covers the surface of the intake valve 9.

[0038] During the intake process of the air inlet valve 9, clean gas is drawn into the pressurization chamber 8, which improves the cleaning effect on the coast.

[0039] By placing the filter screen 11 on the bottom wall of the housing 1, the dust adhering to the surface of the filter screen 11 can fall off naturally on windless days, thus preventing the filter screen 11 from becoming clogged.

[0040] like Figure 2 As shown, an elastic rope 12 is fixedly installed on the side wall of the through hole. The elastic rope 12 is in the shape of a ring.

[0041] By applying tension to the sponge 5 using the elastic cord 12, when the elastic cord 12 is tightly wrapped around the surface of the cable, it ensures that solid impurities in the air can only pass through the pores on the sponge 5 before entering the space between the sponge 5 and the sealing ring 3. This effectively prevents wear on the sponge 5, thus ensuring its filtration effect.

[0042] like Figure 2 , Figure 6 As shown, a guide tube 13 is fixedly installed on the end face of the housing 1. The guide tube 13 is arc-shaped and the opening of the guide tube 13 faces downward. An air hole 14 is provided on the bottom wall of the guide tube 13, and the guide tube 13 is located above the inlet.

[0043] The exhaust valve 10 is a three-way valve. The first output end of the exhaust valve 10 extends into the cavity 6, and the second output end of the exhaust valve 10 extends into the guide pipe 13.

[0044] When the pressurized chamber 8 exhausts gas through the exhaust valve 10, some gas is discharged into the cavity 6, and the rest of the gas is discharged into the guide pipe 13. At this time, the guide pipe 13 exhausts gas through the air hole 14. The gas discharged from the air hole 14 impacts the top wall of the cable downwards, thereby blowing away the impurities that fall on the top wall of the cable and reducing the probability of impurities entering the gap between the cable and the sealing ring 3.

[0045] like Figure 4 As shown, an annular cavity 15 is provided on the sealing ring 3, and the annular cavity 15 is filled with helium gas.

[0046] A heat-conducting rod 16 extending into the housing 1 is inserted into the side wall of the annular cavity 15.

[0047] When heat is generated at the cable connector, the heat is transferred to the helium gas in the annular cavity 15 through the heat-conducting rod 16, causing the helium gas to expand and the elastic sealing ring 3 to fit tightly against the cable. This reduces the probability of solid impurities entering the gap between the sealing ring 3 and the cable, further improving the protection effect on the cable connection structure.

[0048] like Figure 2As shown, the sleeve 4 is made of stainless steel and the inner wall of the sleeve 4 is a smooth mirror surface. Therefore, when solid impurities fall onto the inner bottom wall of the sleeve 4, the friction force on the impurities is reduced, which ensures that the impurities can roll down along the inner wall of the sleeve 4 under their own gravity.

[0049] like Figure 2 As shown, brushes 17 are uniformly fixed on the inner wall of each sleeve 4. When solid materials such as sand and gravel in the air enter the sleeve 4, some impurities are blocked by the brushes 17, change their direction of movement, and fall naturally onto the inner bottom wall of the sleeve 4. A small number of impurities pass through the brushes 17 and come into contact with the sponge 5, reducing the workload of the sponge 5. At the same time, when the impurities come into contact with the brushes 17, the kinetic energy of the impurities is converted into the internal energy of the brushes 17. When the impurities come into contact with the sponge 5, they prevent the impurities from penetrating the sponge 5 or even passing through the sponge 5, further reducing the number of impurities entering the sealed space between the sealing ring 3 and the sponge 5.

[0050] Instructions for use: First, pass the adjacent ends of the two cables to be connected through one of the sealing rings 3, so that the ends of the cables enter the housing 1. At this time, the sealing ring 3 is tightly fitted with the cable sheath, preventing moisture from the external environment from entering the housing 1 and coming into contact with the cable connection, thus preventing leakage. Then connect the adjacent ends of the cable together; Then, install the cover plate 2 at the opening of the housing 1 to complete the connection of the two cables; As the airflow enters the sleeve 4, the impurities first come into contact with the sponge 5. When the impurities impact the sponge 5, the kinetic energy of the impurities is converted into the elastic potential energy of the sponge 5. At this time, the impurities will naturally fall to the inner bottom wall of the sleeve 4. Some of the impurities pass through the sponge 5. During the process of passing through the holes of the sponge 5, the impurities come into contact with the side walls of the holes on the sponge 5, thereby reducing the kinetic energy of the impurities through the sponge 5, so that the impurities fall downward under their own gravity. When the cable vibrates due to strong winds, the outer casing 1 will shift relative to the cable connector due to inertia, compressing the elastic sealing ring 3. This compression action applies pressure to the gas in the pressurization chamber 8, forcing the gas to enter the cavity 6 through the exhaust valve 10. Subsequently, the pressurized gas in the cavity 6 is discharged through the exhaust groove 7, forming an airflow that passes through the sponge 5. This airflow can effectively blow away solid impurities accumulated in the sponge 5, thereby preventing the sponge 5 from becoming clogged.

[0051] This airflow removal mechanism also plays a crucial role during the vibration of the sponge 5: it reduces the amount of impurities entering the sealed space between the sealing ring 3 and the sponge 5, which not only directly reduces the probability of impurities contacting the sealing ring 3 and causing wear, but also further enhances the protective effect of the sealing ring 3, thereby preventing impurities from entering the housing 1 and improving the protection effect on the cable connection structure.

[0052] During the intake process of the intake valve 9, clean gas is drawn into the pressurization chamber 8, which improves the cleaning effect on the sponge 5.

[0053] By placing the filter screen 11 on the bottom wall of the housing 1, impurities adhering to the surface of the filter screen 11 can fall off naturally on windless days, thus preventing the filter screen 11 from becoming clogged.

[0054] By applying tension to the sponge 5 using the elastic cord 12, when the elastic cord 12 is tightly wrapped around the surface of the cable, it ensures that solid impurities in the air can only pass through the pores on the sponge 5 before entering the space between the sponge 5 and the sealing ring 3. This effectively prevents wear on the sponge 5, thus ensuring its filtration effect.

[0055] When the pressurized chamber 8 exhausts gas through the exhaust valve 10, some gas is discharged into the cavity 6, and the rest of the gas is discharged into the guide pipe 13. At this time, the guide pipe 13 exhausts gas through the air hole 14. The gas discharged from the air hole 14 impacts the top wall of the cable downwards, thereby blowing away the impurities that fall on the top wall of the cable and reducing the probability of impurities entering the gap between the cable and the sealing ring 3.

[0056] When heat is generated at the cable connector, the heat is transferred to the helium gas in the annular cavity 15 through the heat-conducting rod 16, causing the helium gas to expand and the elastic sealing ring 3 to fit tightly against the cable. This reduces the probability of solid impurities entering the gap between the sealing ring 3 and the cable, further improving the protection effect on the cable connection structure.

[0057] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A cable assembly, comprising a housing (1), wherein a threaded opening is provided on the top wall of the housing (1), and a cover plate (2) is threadedly installed in the threaded opening. Its features are: Both ends of the housing (1) are provided with sockets, and a circular sealing ring (3) is fixedly installed in the socket. The sealing ring (3) is made of rubber. Both ends of the housing (1) are fixedly fitted with sleeves (4) with openings at both ends. A sponge (5) is fixedly installed on the inner wall of the sleeve (4), and a through hole for cooperating with the cable is opened on the side wall of the sponge (5). The inner diameter of the sleeve (4) gradually increases as it moves away from the shell (1); The sleeve (4) has a cavity (6), and the side wall of the cavity (6) has an exhaust groove (7) evenly distributed. The exhaust groove (7) is inclined, and the gas discharged from the exhaust groove (7) impacts the side wall of the sponge (5). The housing (1) is provided with an air supply mechanism for supplying air to the cavity (6).

2. A cable assembly according to claim 1, characterized in that: The gas supply mechanism includes a pressurization chamber (8) opened on the sealing ring (3), an air intake valve (9) with its output end extending into the pressurization chamber (8) is fixedly installed on the bottom wall of the housing (1), and an exhaust valve (10) with its output end extending into the cavity (6) is fixedly installed on the side wall of the pressurization chamber (8).

3. A cable assembly according to claim 2, characterized in that: A filter screen (11) is fixedly installed on the bottom wall of the housing (1), and the filter screen (11) covers the surface of the air intake valve (9).

4. A cable assembly according to claim 3, characterized in that: An elastic rope (12) is fixedly installed on the side wall of the through hole, and the elastic rope (12) is in the shape of a ring.

5. A cable assembly according to claim 4, characterized in that: A guide tube (13) is fixedly installed on the end face of the housing (1). The guide tube (13) is arc-shaped and the opening of the guide tube (13) faces downward. An air hole (14) is opened on the bottom wall of the guide tube (13), and the guide tube (13) is located above the insertion port.

6. A cable assembly according to claim 5, characterized in that: The exhaust valve (10) is a three-way valve. The first output end of the exhaust valve (10) extends into the cavity (6), and the second output end of the exhaust valve (10) extends into the guide pipe (13).

7. A cable assembly according to claim 1, characterized in that: The sealing ring (3) has an annular cavity (15) and the annular cavity (15) is filled with helium.

8. A cable assembly according to claim 7, characterized in that: A heat-conducting rod (16) extending into the housing (1) is inserted into the side wall of the annular cavity (15).

9. A cable assembly according to claim 1, characterized in that: The sleeve (4) is made of stainless steel, and the inner wall of the sleeve (4) is a smooth mirror surface.

10. A cable assembly according to claim 1, characterized in that: Each of the sleeves (4) has a brush (17) evenly fixedly installed on its inner sidewall.

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