Coaxial cable sealing assembly for high-voltage pulse capacitor discharge switch

Abstract

The invention provides a coaxial cable sealing assembly for a discharge switch of a high-voltage pulse capacitor. The coaxial cable sealing assembly comprises an inner conductor sealing sleeve, an insulating layer sealing assembly, an outer conductor sealing assembly and a sheath sealing assembly which are used for sealing an inner conductor, an insulating layer, an outer conductor and a sheath of a coaxial cable layer by layer. Through a multi-layer sealing structure, four layers of the coaxial cable are respectively and independently sealed, and a cooling liquid and volatile gas are effectively prevented from leaking through a conductor part, so that the problems of poor air tightness, cooling liquid leakage and the like caused by insufficient air gap sealing of the conductor part of the coaxial cable in the prior art are solved; the operation reliability of the liquid cooling radiator is obviously improved; the sealing assemblies are stably fixed through threaded connection between the pressing rings and the sleeves, meanwhile, the sealing gaskets are arranged in the pressing rings, pressure is applied by rotating the pressing rings, the sealing gaskets are tightly attached to the end faces of the coaxial cables, and efficient and reliable airtight sealing is further guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid cooling and heat dissipation of electronic components and relates to a coaxial cable sealing component for a high-voltage pulse capacitor discharge switch. Background Art

[0002] High-voltage pulse capacitors are key devices that release a large amount of electrical energy in a short period of time and are widely used in radar, laser, and high-energy physics. During its operation, the discharge circuit will be subjected to extremely large pulse currents, causing the electronic components in the circuit to heat up very quickly and generate very high amounts of heat. Among them, the overheating problem of the core components of the discharge circuit is particularly prominent. If the heat dissipation is insufficient, it will not only reduce the operating efficiency of the equipment, but may also cause equipment failure and even cause safety hazards. Therefore, extremely high requirements are placed on the heat dissipation of the high-voltage pulse capacitor discharge switch.

[0003] As a highly efficient heat dissipation device, liquid-cooled radiators have been widely used in the heat dissipation system of high-voltage pulse capacitor discharge switches. Liquid-cooled radiators are mainly composed of a coolant circulation system, a heat sink and connecting components. The coolant circulation system includes a liquid pump, pipes and a radiator, which are used for the flow of coolant and the transfer of heat; the heat sink is usually a component that directly contacts the heat source and is responsible for transferring heat to the coolant; and the connecting components are responsible for the electrical and signal connection between the radiator and other equipment. In the liquid-cooled heat dissipation system of high-voltage pulse capacitors, coaxial cables, as important connecting components for energy transmission, not only need to ensure transmission performance, but also must maintain good airtightness for a long time under complex working conditions such as high temperature, high pressure, and strong vibration.

[0004] The interface of the coaxial cable is a weak link where the coolant and volatile gas may leak. Once leaked, it will not only reduce the heat dissipation efficiency of the liquid-cooled radiator, but may also cause the coolant to corrode electronic components, short circuit or other safety problems. Therefore, how to improve the sealing performance of the coaxial cable interface is an important technical problem to ensure the reliability and safety of the liquid cooling system. In the prior art, the patent application with application publication number CN118763448A and name "An Improved Coaxial Cable" discloses a technical solution for sealing the coaxial cable interface through the design of a sliding part and a sealing block. The improved coaxial cable is provided with a snap-on cover at the connection of the cable segment and the sealing block is controlled by the sliding part to extrude and splice to form an annular seal, and the reinforcement part firmly connects the snap-on cover and the sliding part together in an interlocking manner and simultaneously limits and reinforces the two, so that the overall cable has stable sealing, which can effectively ensure the convenience of cable connection and installation. This invention can achieve the sealing of the coaxial cable interface, but in the liquid cooling system, it is still impossible to avoid the leakage of coolant and volatile gases through the inner conductor and outer conductor of the coaxial cable, thereby weakening the sealing performance of the liquid cooling system and the safety of equipment operation. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and propose a coaxial cable airtight interface assembly for a liquid-cooled radiator, aiming to solve the problem of insufficient airtightness of the conductor part of the coaxial cable in the prior art, avoid leakage of coolant and volatile gas therefrom, and improve the airtightness of the coaxial cable in a complex liquid cooling environment.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A coaxial cable sealing assembly for a high-voltage pulse capacitor discharge switch comprises an inner conductor sealing sleeve 1, an insulating layer sealing assembly 2, an outer conductor sealing assembly 3 and a sheath sealing assembly 4 for sequentially sealing the inner conductor, insulating layer, outer conductor and sheath of the coaxial cable.

[0008] As an optimization, the inner conductor sealing sleeve 1 adopts a hollow structure with one end closed, and is sleeved on the outer side of the inner conductor of the coaxial cable. The open end of the inner conductor sealing sleeve 1 is provided with a boss to prevent it from falling off.

[0009] As an optimization, the insulating layer sealing assembly 2 includes an insulating layer sleeve 21, an insulating layer pressing ring 22 and an insulating layer sealing gasket 23; the insulating layer sleeve 21 is sleeved on the outside of the coaxial cable insulation layer, and both ends thereof are provided with external threads; the insulating layer pressing ring 22 is sleeved on the inner conductor sealing sleeve 1, and is provided with an internal thread that matches one end of the insulating layer sleeve 21; the insulating layer sealing gasket 23 is placed on the bottom surface of the internal threaded hole of the insulating layer pressing ring 22; by rotating the insulating layer pressing ring 22, the insulating layer sealing gasket 23 forms a tight seal with the end face of the coaxial cable insulation layer.

[0010] As an optimization, the boss provided at the open end of the inner conductor sealing sleeve 1 is crimped between the insulating layer sealing gasket 23 and the end surface of the coaxial cable insulating layer.

[0011] As an optimization, the outer conductor sealing assembly 3 includes an outer conductor sleeve 31, an outer conductor pressing ring 32 and an outer conductor sealing gasket 33; the outer conductor sleeve 31 is sleeved on the outside of the outer conductor of the coaxial cable; the outer conductor pressing ring 32 is provided with an internal thread matching the other end of the insulating layer sleeve 21 and a first countersunk hole and a second countersunk hole of unequal diameters, and the diameters of the first countersunk hole and the second countersunk hole are respectively equal to the outer diameters of the outer conductor sealing gasket 33 and the outer conductor sleeve 31; the outer conductor sealing gasket 33 is placed on the bottom surface of the first countersunk hole of the outer conductor pressing ring 32; the second countersunk hole is sleeved on one end of the outer conductor sleeve 31; by rotating the outer conductor pressing ring 32, the outer conductor sealing gasket 33 is tightly sealed with the end face of the outer conductor of the coaxial cable.

[0012] As an optimization, the sheath sealing assembly 4 includes a sheath sleeve 41, a sheath pressing ring 42 and a sheath sealing gasket 43; the sheath sleeve 41 is sleeved on the outside of the coaxial cable sheath, and one end of the sheath sleeve is provided with an external thread; the sheath pressing ring 42 is sleeved on the outer conductor sleeve 31, and an internal thread matching one end of the sheath sleeve 41 is provided thereon; the sheath sealing gasket 43 is placed on the bottom surface of the internal threaded hole of the sheath pressing ring 42; by rotating the sheath pressing ring 42, the sheath sealing gasket 43 forms a tight seal with the end face of the coaxial cable sheath.

[0013] As an optimization, the inner conductor sealing sleeve 1 and the outer conductor sleeve 31 are both made of conductive materials.

[0014] As an optimization, the insulating layer pressing ring 22, the outer conductor pressing ring 32 and the sheath pressing ring 42 are all made of insulating materials; the insulating layer sealing gasket 23, the outer conductor sealing gasket 33 and the sheath sealing gasket 43 are all made of elastic insulating materials.

[0015] As an optimization, the insulating layer pressing ring 22 and the sheath pressing ring 42 are respectively provided with through holes for the inner conductor sealing sleeve 1 and the outer conductor sleeve 31 to pass through on the end faces where the internal threaded holes are not provided, and the diameters of the through holes on the insulating layer pressing ring 22 and the sheath pressing ring 42 are respectively equal to the outer diameters of the inner conductor sealing sleeve 1 and the outer conductor sleeve 31.

[0016] As an optimization, the inner conductor sealing sleeve 1 and the outer conductor sleeve 31 respectively achieve radial fixation of the inner conductor sealing sleeve 1 and the inner conductor of the coaxial cable, and radial fixation of the outer conductor sleeve 31 and the outer conductor of the coaxial cable through the pressing block on the electrical interface of the liquid-cooled radiator.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The present invention effectively prevents leakage of coolant and volatile gas from the conductor part of the coaxial cable through a multi-level sealing structure of an inner conductor sleeve, an insulating layer sealing assembly, an outer conductor sealing assembly and a sheath sealing assembly, thereby avoiding the defect of poor air tightness caused by the inability to seal the air gap of the conductor part of the coaxial cable in the prior art, and effectively improving the reliability of the liquid-cooled radiator.

[0019] (2) In the present invention, the insulating layer pressing ring, the outer conductor pressing ring and the sheath pressing ring are connected to the insulating layer sleeve and the sheath sleeve through threads, and a sealing gasket is placed inside each pressing ring. Pressure is applied by rotating the pressing ring so that the sealing gasket and the corresponding circular ring end face are tightly matched to form an efficient airtight connection. At the same time, the modular design not only makes the assembly of the components compact and the connection stable, but also simplifies the subsequent maintenance and replacement process. It has good applicability and promotion value, and further improves the reliability of the liquid-cooled radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional schematic diagram of the insulating layer sealing assembly of the present invention;

[0022] Figure 3 is a cross-sectional schematic diagram of an outer conductor sealing assembly of the present invention;

[0023] Figure 4 It is a cross-sectional schematic diagram of the sheath sealing assembly of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] See attached Figure 1 The main structure of the present invention comprises an inner conductor sealing sleeve 1, an insulating layer sealing assembly 2, an outer conductor sealing assembly 3 and a sheath sealing assembly 4 for sealing the inner conductor, insulating layer, outer conductor and sheath of the coaxial cable in sequence.

[0026] The inner conductor sealing sleeve 1 is a hollow structure with one end closed, and a boss is provided at its open end to prevent it from falling off. The outer diameter of the boss is larger than the inner diameter of the circular hole in which the insulating layer pressing ring 22 and the inner conductor sealing sleeve 1 are fitted, thereby ensuring a stable connection of the assembly and preventing it from loosening; the inner conductor sealing sleeve 1 is made of conductive material and is fitted on the outer side of the inner conductor of the coaxial cable, which can not only ensure a reliable electrical connection between the inner conductor and the liquid-cooled radiator, but also effectively seal the inner conductor to prevent the coolant or volatile gas from leaking from the inner conductor; the boss of the inner conductor sealing sleeve 1 is fixed between the insulating layer sealing gasket 23 and the end face of the coaxial cable insulation layer by crimping, thereby further enhancing its fixing effect.

[0027] The inner conductor sealing sleeve 1, the insulating layer sealing assembly 2, the outer conductor sealing assembly 3 and the sheath sealing assembly 4 are connected in sequence to form a multi-level sealing structure that increases layer by layer to ensure the sealing effect and assembly stability. This structural design can not only effectively improve the sealing performance, but also ensure the stability of the assembly, so that it can maintain good airtightness and mechanical reliability for a long time under complex working conditions such as high temperature, high pressure and strong vibration.

[0028] See attached Figure 2The insulating layer sealing component 2 includes an insulating layer sleeve 21, an insulating layer pressing ring 22 and an insulating layer sealing gasket 23; the insulating layer sleeve 21 is sleeved on the outer side of the coaxial cable insulating layer, and is hollow and has two open ends. Its inner diameter is equal to the outer diameter of the coaxial cable insulating layer to ensure a tight fit, and both ends of the insulating layer sleeve 21 are provided with external threads for threaded connection with other components to ensure assembly stability and sealing; the insulating layer pressing ring 22 is sleeved on the inner conductor sealing sleeve 1, and is provided with an internal thread that matches one end of the insulating layer sleeve 21, and the top of the internal thread is designed as a guide The inclined surface facilitates the rapid alignment and installation of the components; the other end of the insulating layer pressing ring 22 is a circular hole that matches the outer diameter of the inner conductor sealing sleeve 1 to ensure a stable connection between the components; in order to improve the convenience and reliability of the assembly operation, the outer side of the insulating layer pressing ring 22 is designed with cross anti-slip patterns to increase the friction during manual rotation; the insulating layer sealing gasket 23 is placed on the bottom surface of the inner threaded hole of the insulating layer pressing ring 22, and the sealing gasket 23 is pressed to the end face of the coaxial cable insulation layer by rotating the insulating layer pressing ring 22, thereby achieving efficient airtight sealing and effectively preventing the leakage of coolant and volatile gases.

[0029] The insulating layer sleeve 21 and the insulating layer pressing ring 22 are both made of high-strength insulating material, and have both excellent electrical insulation performance and sufficient mechanical strength; the insulating layer sealing gasket 23 is made of elastic insulating material, has good flexibility and durability, and can maintain reliable sealing performance for a long time under complex working conditions such as high temperature and high pressure.

[0030] See attached Figure 3The outer conductor sealing assembly 3 comprises an outer conductor sleeve 31, an outer conductor pressing ring 32 and an outer conductor sealing pad 33; the outer conductor sleeve 31 is sleeved on the outer side of the coaxial cable outer conductor, and is a hollow structure with two ends open as a whole, and its inner diameter is equal to the outer diameter of the coaxial cable outer conductor to ensure a tight fit, and one end of the outer conductor sleeve 31 is provided with a through hole with an inner diameter equal to the outer diameter of the coaxial cable insulation layer, which is used to fit the end face of the coaxial cable outer conductor, thereby ensuring the sealing of the coaxial cable outer conductor and preventing leakage; the outer conductor pressing ring 32 is provided with an internal thread that matches the other end of the insulation layer sleeve 21 and a first countersunk hole and a second countersunk hole of different diameters, and the outer side is designed with cross anti-slip patterns to increase The friction force during manual rotation is increased; the diameter of the first countersunk hole is equal to the outer diameter of the outer conductor sealing gasket 33, and the inner side thereof is a guiding slope, which is convenient for rapid alignment and assembly of the components; the diameter of the second countersunk hole is equal to the outer diameter of the outer conductor sleeve 31, and is used to firmly fix the outer conductor sleeve 31 on the outer conductor pressing ring 32; the outer conductor sealing gasket 33 is placed on the bottom surface of the first countersunk hole of the outer conductor pressing ring 32, and the second countersunk hole is mounted on one end of the outer conductor sleeve 31; by rotating the insulating layer pressing ring 22, the insulating layer sealing gasket 23 is tightly sealed with the end face of the insulating layer of the coaxial cable, thereby achieving a reliable airtight seal to prevent the coolant or volatile gas from leaking through the outer conductor of the coaxial cable.

[0031] The outer conductor sleeve 31 is made of conductive material to ensure the electrical connection between the outer conductor of the coaxial cable and the liquid-cooled radiator; the outer conductor pressing ring 32 is made of insulating material to ensure both mechanical strength and insulation performance; the outer conductor sealing gasket 33 is made of elastic insulating material with excellent flexibility and long-term sealing performance.

[0032] Refer to the attached Figure 4The sheath sealing assembly 4 comprises a sheath sleeve 41, a sheath pressing ring 42 and a sheath sealing pad 43; the sheath sleeve 41 is a hollow structure with two ends open, and its inner diameter is equal to the outer diameter of the coaxial cable sheath to ensure a close fit, and is sleeved on the outside of the coaxial cable sheath, and one end of the sheath sleeve 41 is provided with an external thread for threaded connection with the sheath pressing ring 42 to ensure the stability and sealing of the assembly; the sheath pressing ring 42 is sleeved on the outer conductor sleeve 31, and an internal thread is provided inside thereof to match one end of the sheath sleeve 41, and a guiding inclined surface is designed at the top of the internal thread to facilitate assembly during installation The other end of the sheath pressing ring 42 is a circular hole with an inner diameter equal to the outer diameter of the outer conductor sleeve 31, ensuring a stable connection between the pressing ring and the outer conductor sleeve; the outer side of the sheath pressing ring 42 is provided with cross anti-slip patterns to enhance the grip and improve the convenience and reliability of assembly operations; the sheath sealing gasket 43 is placed on the bottom surface of the inner threaded hole of the sheath pressing ring 42, and the sheath pressing ring 42 is rotated to form a close contact between the sheath sealing gasket 43 and the end face of the coaxial cable sheath, thereby achieving a reliable airtight seal and effectively preventing the coolant or volatile gas from leaking through the coaxial cable sheath.

[0033] The sheath sleeve 41 and the sheath pressure ring 42 are both made of high-strength insulating materials to ensure good electrical insulation performance and mechanical strength; the sheath sealing gasket 43 is made of elastic insulating material with excellent flexibility and durability to ensure the safety and reliability of the system.

[0034] The assembly method of the present invention is as follows: First, prepare a coaxial cable, and sequentially place the sheath sleeve 41, the outer conductor sleeve 31, the insulating layer sleeve 21 and the inner conductor sleeve 1 on the outer side of the sheath, outer conductor, insulating layer and inner conductor of the coaxial cable. Then, place the insulating layer sealing gasket 23, the outer conductor sealing gasket 33 and the sheath sealing gasket 43 inside the insulating layer pressing ring 22, the outer conductor pressing ring 32 and the sheath pressing ring 42 respectively. Next, connect the sheath pressing ring 42 to the sheath sleeve 41, the outer conductor pressing ring 32 to the outer conductor side of the insulating layer sleeve 21, and the insulating layer pressing ring 22 to the inner conductor side of the insulating layer sleeve 21 in sequence by threaded connection. In the liquid-cooled radiator, the inner conductor sleeve 1 and the outer conductor sleeve 31 are fixed to the interface of the coaxial cable by radial crimping to complete the connection between the sealing assembly and the coaxial cable. Finally, perform an airtightness check on each connection part to ensure airtightness and no leakage.

[0035] The above-described embodiments are only for illustrating the content of the invention and are not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. A coaxial cable sealing assembly for a high voltage pulse capacitor discharge switch, characterized in that: The invention comprises an inner conductor sealing sleeve (1), an insulating layer sealing component (2), an outer conductor sealing component (3) and a sheath sealing component (4) which are used to seal the inner conductor, insulating layer, outer conductor and sheath of a coaxial cable in sequence.

2. The coaxial cable sealing assembly according to claim 1, characterized in that: The inner conductor sealing sleeve (1) adopts a hollow structure with one end closed and is sleeved on the outer side of the inner conductor of the coaxial cable. The open end of the inner conductor sealing sleeve (1) is provided with a boss to prevent it from falling off.

3. The coaxial cable sealing assembly according to claim 2, characterized in that: The insulating layer sealing assembly (2) comprises an insulating layer sleeve (21), an insulating layer pressing ring (22) and an insulating layer sealing gasket (23); the insulating layer sleeve (21) is sleeved on the outer side of the insulating layer of the coaxial cable, and both ends of the insulating layer sleeve are provided with external threads; the insulating layer pressing ring (22) is sleeved on the inner conductor sealing sleeve (1), and is provided with an internal thread that matches one end of the insulating layer sleeve (21); the insulating layer sealing gasket (23) is placed on the bottom surface of the internal thread hole of the insulating layer pressing ring (22); by rotating the insulating layer pressing ring (22), the insulating layer sealing gasket (23) and the end face of the insulating layer of the coaxial cable are tightly sealed.

4. The coaxial cable sealing assembly according to claim 3, characterized in that: The inner conductor sealing sleeve (1) has a boss arranged at its open end which is crimped between the insulating layer sealing gasket (23) and the end surface of the coaxial cable insulating layer.

5. The coaxial cable sealing assembly according to claim 3, characterized in that: The outer conductor sealing assembly (3) comprises an outer conductor sleeve (31), an outer conductor pressing ring (32) and an outer conductor sealing gasket (33); the outer conductor sleeve (31) is sleeved on the outer side of the outer conductor of the coaxial cable; the outer conductor pressing ring (32) is provided with an internal thread matching the other end of the insulating layer sleeve (21) and a first countersunk hole and a second countersunk hole of different diameters, and the diameters of the first countersunk hole and the second countersunk hole are respectively equal to the outer diameters of the outer conductor sealing gasket (33) and the outer conductor sleeve (31); the outer conductor sealing gasket (33) is placed on the bottom surface of the first countersunk hole of the outer conductor pressing ring (32); the second countersunk hole is sleeved on one end of the outer conductor sleeve (31); by rotating the outer conductor pressing ring (32), the outer conductor sealing gasket (33) and the end face of the outer conductor of the coaxial cable are tightly sealed.

6. The coaxial cable sealing assembly according to claim 5, characterized in that: The sheath sealing assembly (4) comprises a sheath sleeve (41), a sheath pressing ring (42) and a sheath sealing gasket (43); the sheath sleeve (41) is sleeved on the outer side of the coaxial cable sheath, and one end of the sheath sleeve is provided with an external thread; the sheath pressing ring (42) is sleeved on the outer conductor sleeve (31), and an internal thread matching one end of the sheath sleeve (41) is provided on the sheath pressing ring; the sheath sealing gasket (43) is placed on the bottom surface of the internal thread hole of the sheath pressing ring (42); by rotating the sheath pressing ring (42), the sheath sealing gasket (43) and the end face of the coaxial cable sheath form a tight seal.

7. The coaxial cable sealing assembly according to claim 6, characterized in that: The inner conductor sealing sleeve (1) and the outer conductor sleeve (31) are both made of conductive materials.

8. The coaxial cable sealing assembly according to claim 6, characterized in that: The insulating layer pressing ring (22), the outer conductor pressing ring (32) and the sheath pressing ring (42) are all made of insulating materials; the insulating layer sealing gasket (23), the outer conductor sealing gasket (33) and the sheath sealing gasket (43) are all made of elastic insulating materials.

9. The coaxial cable sealing assembly according to claim 6, characterized in that: The insulating layer pressing ring (22) and the sheath pressing ring (42) are provided with through holes for the inner conductor sealing sleeve (1) and the outer conductor sleeve (31) to pass through on their end surfaces without internal threaded holes, and the diameters of the through holes on the insulating layer pressing ring (22) and the sheath pressing ring (42) are respectively equal to the outer diameters of the inner conductor sealing sleeve (1) and the outer conductor sleeve (31).

10. The coaxial cable sealing assembly according to claim 9, characterized in that: The inner conductor sealing sleeve (1) and the outer conductor sleeve (31) respectively achieve radial fixation of the inner conductor sealing sleeve (1) and the inner conductor of the coaxial cable, and radial fixation of the outer conductor sleeve (31) and the outer conductor of the coaxial cable, through a pressing block on the electrical interface of the liquid cooling radiator.

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