A kind of fast electrical connection structure for high-voltage high-frequency pulse environment

Abstract

The application provides a quick electric connection structure for a high-voltage high-frequency pulse environment, and relates to the technical field of high-voltage high-frequency electricity, which comprises a plug, a socket and a cable; the cable is connected to the socket through the plug; the plug and the socket enclose a ring cavity which surrounds the cable; and the ring cavity is filled with a protective fluid. The application maintains a high-intensity insulating fluid protection layer around the cable connection part in the ring cavity by filling the ring cavity in the plug and the socket with the protective fluid, reduces the internal humidity, and can effectively reduce the possibility of corona and creeping.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-voltage high-frequency electrical technology, in particular to a quick electrical connection structure for use in a high-voltage high-frequency pulse environment. BACKGROUND

[0002] High-voltage high-frequency pulse energy needs to be transmitted between high-frequency magnetic compression pulse switching power supplies, and electrical contacts of a connection device are prone to corona and creeping. Currently, commonly used high-voltage connectors have strong limitations and are not suitable for some high-frequency pulse high-voltage environments, such as 30 kilovolts and 6 kilohertz. Using ordinary high-voltage connectors can easily burn the connection circuit and the connection device, and can easily cause the connection device to fall off, and can even damage the equipment. SUMMARY

[0003] The present application aims to provide a quick electrical connection structure for use in a high-voltage high-frequency pulse environment to solve at least one of the above technical problems in the prior art.

[0004] To solve the above technical problems, the present application provides a quick electrical connection structure for use in a high-voltage high-frequency pulse environment, comprising: a plug, a socket, and a cable.

[0005] The cable is connected to the socket through the plug.

[0006] The plug and the socket enclose a ring-shaped cavity around the cable; the ring-shaped cavity is filled with a protective fluid.

[0007] The present application introduces a protective fluid into the ring-shaped cavity inside the plug and the socket, maintains a high-strength insulating fluid protective layer around the cable connection part in the ring-shaped cavity, reduces the internal humidity, and can effectively reduce the possibility of corona and creeping.

[0008] Further, the protective fluid is an inert fluid (such as argon, helium) or nitrogen; the protective fluid can also be a protective oil, etc.

[0009] Further, the socket is provided with a socket core; the front end of the cable is provided with an electrical connector that is plugged and matched with the socket core.

[0010] The socket core is connected to an electrical device through a lead wire led out from the socket. Preferably, the socket core is made of a high-conductivity corrosion-resistant material such as red copper plated with nickel; the electrical connector is a banana head; the banana head is a commonly used elastic electrical contact structure in electronic devices, and the banana head can be fixedly connected with the cable by welding.

[0011] Further, the pressure value of the protective fluid filled in the annular cavity is greater than the external atmospheric pressure. The positive pressure state of the protective fluid in the annular cavity can maintain a high-intensity insulation fluid protection layer around the annular cavity, the electrical connector and the socket core for a longer time, effectively reduce the internal humidity, and the protection effect is more durable and the insulation effect is better.

[0012] Further, an inlet for introducing the protective fluid into the annular cavity is arranged on the plug or the socket. Preferably, a one-way valve is arranged on the inlet.

[0013] Preferably, an air inlet joint is arranged on the inlet.

[0014] Further, an outlet communicating with the annular cavity is arranged on the socket or the plug; and an overflow valve or the like is arranged on the outlet.

[0015] The outlet is arranged to facilitate the discharge of the original air when the protective fluid is introduced, thereby ensuring the purity of the protective fluid in the annular cavity. And by arranging a one-way conduction element such as an overflow valve, the pressure value in the annular cavity can be effectively controlled.

[0016] Further, the socket is provided with a receiving groove on the side of the plug for receiving the cable head; the inner diameter of the receiving groove is greater than the diameter of the cable, and the cable does not contact the inner side wall of the receiving groove after being inserted into the receiving groove.

[0017] Further, a first annular cavity is arranged in the socket, and the first annular cavity is arranged outside the receiving groove; and an annular axial protrusion is arranged between the first annular cavity and the receiving groove. The annular axial protrusion is in the form of a sleeve, and the receiving groove is formed on the inner side of the annular axial protrusion, and the first annular cavity is formed on the outer side of the annular axial protrusion.

[0018] Creepage is a slight discharge phenomenon on the surface of an insulator, which is particularly obvious at the connection part of the circuit. In the present application, the connection part of the electrical connector and the socket core and the end of the cable head are most prone to creepage. In the present application, a first annular cavity is arranged on the outer circumference of the receiving groove for receiving the cable head. The first annular cavity is filled with a protective fluid as part of the annular cavity, and the first annular cavity effectively prevents the spread of electrons outward, limiting the creepage phenomenon within a smaller range inside the socket body.

[0019] At least the annular axial protrusion part of the socket is made of an insulating material. The arrangement of the annular axial protrusion greatly increases the creepage distance, and in combination with the first annular cavity, further effectively prevents the spread of electrons outward.

[0020] Further, in the axial direction of the cable, the bottom of the first annular cavity protrudes from the bottom of the receiving groove, and the first annular cavity completely wraps around the receiving groove.

[0021] Further, the socket comprises a socket head and a socket body; the socket body is connected with the plug through the socket head; the socket body is made of insulating material, such as rubber, ceramic, PPS plastic, etc.; the accommodating groove or the first annular cavity is arranged in the socket body.

[0022] The connection mode between the socket head and the socket body is various, which can be interference fit, threaded connection or snap ring locking, etc.

[0023] Further, the bottom of the accommodating groove is provided with a slot for receiving the electric connector; the socket core is arranged in the slot. More preferably, the slot is provided with a guide surface for guiding the insertion of the electric connector.

[0024] Further, the socket head is made of conductive metal material such as brass, and the socket head is provided with an annular connecting seat protruding outward in the radial direction, and the annular connecting seat is provided with a connecting hole or a positioning hole.

[0025] Further, the socket head is connected with the ground wire.

[0026] Further, the socket body is provided with an annular groove on the outer circle close to the socket head, or is provided with a plurality of annular grooves at intervals.

[0027] The annular groove can effectively prevent the occurrence or spread of creeping along the outer surface of the socket body caused by high-voltage electric field.

[0028] Further, the plug comprises a plug body, and the plug body is provided with a through hole; the cable is inserted into the through hole from the second end of the plug body, and the head of the cable extends out of the through hole from the first end of the plug body; after the first end of the plug body is sealingly connected with the socket, the head of the cable extends into the accommodating groove.

[0029] Further, the inner side surface of the through hole is smooth without sharp points.

[0030] Further, a sealing structure is arranged between the plug body and the socket head for sealing connection therebetween.

[0031] Preferably, the plug further comprises a fixing nut (or a fixing ring sleeve); the outer circle of the socket head is provided with external threads, one end of the fixing nut is provided with internal threads, and the other end is provided with a working ring table protruding inward in the radial direction; the plug body is provided with a boss matched with the working ring table; a clamping sleeve structure for pipe butt joint is formed between the socket head and the fixing nut. After the first end of the plug body is inserted into the middle mounting hole of the socket head, the fixing nut is tightened on the socket head, and the fixing nut forces the boss of the plug body to tightly abut against the end surface of the socket head through the working ring table, thereby realizing the sealing connection therebetween. The sealing gasket can also be arranged between the plug body and the socket head to enhance the sealing performance.

[0032] Further, the locking device for sealingly connecting the cable with the plug body comprises a cable locker and a locking sleeve, the first end of the cable locker abuts against the second end of the plug body, the second end of the cable locker is provided with a plurality of elastic pieces arranged in a circumferential direction, one end of the locking sleeve is threadedly connected with the plug body and a sealing structure is arranged between the locking sleeve and the plug body, the other end of the locking sleeve is provided with a wedge surface, and the cable is inserted into the plug body through the through hole of the cable locker and the locking sleeve, and when the locking sleeve is screwed, the wedge surface forces the elastic pieces to shrink in the radial direction and tightly hold the cable.

[0033] Further, the inner side of the elastic piece is provided with anti-skid teeth or anti-skid lines for holding the cable.

[0034] Further, the plug body, the locking sleeve and the cable locker are made of conductive metal materials, such as brass, stainless steel, etc. More preferably, the cable locker is made of elastic conductive materials, such as beryllium bronze, etc.

[0035] Further, the first end of the cable locker is provided with a ring body, and the ring body is provided with an outer taper surface, and the second end of the plug body is provided with an inner taper surface matched with the outer taper surface.

[0036] Further, a shielding net is further arranged on the cable, and the end of the shielding net (i.e. one end of the cable head) is pressed and fixed between the plug body and the cable locker after being turned up. Specifically, the end of the shielding net is pressed and fixed between the outer taper surface and the inner taper surface after being turned up.

[0037] Further, the other end of the locking sleeve is provided with a radially inwardly protruding ring platform, and the ring platform is provided with a wedge surface, and a sealing structure is arranged between the ring platform and the cable, such as one or more sealing rings, etc.

[0038] Further, the inner diameter of the through hole near the socket end is larger than the inner diameter of the through hole far from the socket end, and the inner surface of the through hole is smoothly transitioned.

[0039] Further, a support sleeve made of insulating material is further arranged in the through hole of the plug body and on the cable, for preventing the cable from directly contacting the plug body.

[0040] Preferably, the support sleeve is made of high-strength insulating material, such as PPS, PTFE, PEEK, etc.

[0041] Further, the support sleeve is fixedly connected with the plug body in a threaded manner, a plug-in manner or a clamping manner.

[0042] Further, the support sleeve sequentially comprises a threaded portion, a conical platform portion and a sleeve portion in the axial direction, the wall thickness of the conical platform portion is larger than the wall thickness of the threaded portion and the sleeve portion, the conical platform portion is provided with an outer conical platform surface, and the through hole of the plug body is provided with an inner taper surface matched with the outer conical platform surface.

[0043] The support sleeve in this application is arrow-shaped overall, and the truncated cone portion greatly improves its own support capacity, preventing the cable portion inside the plug and socket from directly contacting the plug and socket during use. The outer end of the sleeve is flush with or protrudes from the first end face of the plug body, which improves its own support capacity while reserving a larger second annular cavity between the sleeve and the plug body, thereby increasing the volume of the protective fluid; after the plug and socket are connected, the first annular cavity and the second annular cavity are connected to form the aforementioned annular cavity.

[0044] Furthermore, the locking sleeve is provided with an inlet; the socket body is provided with an outlet.

[0045] Furthermore, the support sleeve is provided with a fluid flow channel for protecting the fluid passing through. This facilitates the flow of protective fluid, which is filled into the self-locking sleeve inlet, into the annular cavity through the fluid flow channel.

[0046] Furthermore, it also includes an anti-bending sleeve fitted over the cable to improve the cable's resistance to bending. Preferably, the anti-bending sleeve and the locking sleeve are fixedly connected by a snap-fit ​​or threaded connection.

[0047] By adopting the above technical solution, the present invention has the following beneficial effects:

[0048] The present invention provides a fast electrical connection structure for high-voltage, high-frequency pulse environments. By introducing a protective fluid into the annular cavity inside the plug and socket, a high-strength insulating fluid protective layer is maintained inside the annular cavity and around the cable connection point, reducing internal humidity and effectively reducing the possibility of corona discharge and creepage. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a front view of the fast electrical connection structure provided in an embodiment of the present invention;

[0051] Figure 2 for Figure 1 A cross-sectional view of the socket shown;

[0052] Figure 3 for Figure 1 A cross-sectional view of the plug shown;

[0053] Figure 4 This is a perspective view of the socket head in an embodiment of the present invention;

[0054] Figure 5 Fig. 1 is a perspective view of a plug according to an embodiment of the present application;

[0055] Figure 6 Fig. 2 is a schematic view of the internal structure of the plug according to an embodiment of the present application;

[0056] Figure 7 Fig. 3 is a perspective view of a socket according to an embodiment of the present application;

[0057] Figure 8 Fig. 4 is a schematic view of the principle of protecting fluid according to an embodiment of the present application;

[0058] Figure 9 Fig. 5 is a perspective view of a support sleeve according to an embodiment of the present application;

[0059] Figure 10 Fig. 6 is a sectional view of the support sleeve according to an embodiment of the present application.

[0060] Reference signs:

[0061] 1 - plug; 1.1 - plug body; 1.1a - through hole; 1.2 - support sleeve; 1.2a - threaded portion; 1.2b - conical portion; 1.2c - sleeve portion; 1.2d - fluid flow channel; 1.3 - locking sleeve; 1.3a - wedge surface; 1.4 - wire locker; 1.4a - ring body portion; 1.4b - elastic sheet; 1.4c - anti-skid tooth; 1.5 - air inlet connector; 1.6 - anti-bending sleeve; 1.7 - fixing nut; 2 - socket; 2.1 - socket head; 2.2 - socket body; 2.2a - annular groove; 2.3 - socket core; 2.4 - accommodating groove; 2.5 - insertion slot; 4 - annular cavity; 4.1 - first annular cavity; 4.2 - second annular cavity; 4.3 - inlet; 4.4 - outlet; 100 - cable; 101 - electrical connector; 102 - head; 100a - shielding mesh. DETAILED DESCRIPTION

[0062] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0063] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] The present invention will be further explained below with reference to specific embodiments.

[0066] like Figures 1-10 As shown, this embodiment provides a rapid electrical connection structure for use in high-voltage, high-frequency pulse environments, comprising: a plug 1, a socket 2, and a cable 100; the cable 100 is connected to the socket 2 via the plug 1; the plug 1 and the socket 2 together form an annular cavity 4 surrounding the cable 100; the annular cavity 4 is filled with a protective fluid. Specifically, the annular cavity 4 is formed by splicing a first half-cavity within the plug 1 and a second half-cavity within the socket 2, and the cable 100 passes through the middle of the two half-cavities, thereby forming an annular chamber.

[0067] The present invention reduces the possibility of corona discharge and creepage by introducing a protective fluid into the annular cavity 4 inside the plug 1 and socket 2, maintaining a high-strength insulating fluid protective layer in the annular cavity 4 and around the connection part of the cable 100, reducing internal humidity.

[0068] The protective fluid is preferably an inert gas, such as argon or helium; the protective fluid can also be a protective oil.

[0069] like Figure 2 As shown, the socket 2 is provided with a socket core 2.3; the front end of the cable 100 is provided with an electrical connector 101 that is plugged into the socket core 2.3.

[0070] The socket core 2.3 is connected with the electrical equipment through the lead wire from the socket 2. Preferably, the socket core 2.3 is made of high-conductivity anticorrosion material such as nickel-plated red copper; the electrical connector 101 is a banana head; the banana head is a common elastic electrical contact structure in electronic equipment, and the banana head can be fixedly connected with the cable 100 through welding.

[0071] The pressure value of the protective fluid filled in the annular cavity 4 is greater than the external atmospheric pressure. The positive pressure state of the protective fluid in the annular cavity 4 can maintain a high-intensity insulation fluid protection layer around the annular cavity 4, the electrical connector 101 and the socket core 2.3 for a longer time, effectively reduces the internal humidity, and has more durable protection effect and better insulation effect.

[0072] As shown in Figure 3 , the plug 1 is provided with an inlet 4.3 for introducing the protective fluid into the annular cavity 4; the inlet 4.3 is provided with an air inlet connector 1.5, and the air inlet connector 1.5 is provided with a one-way valve (not shown). The socket 2 is provided with an outlet 4.4 communicating with the annular cavity 4; the outlet 4.4 is provided with an overflow valve (not shown). The outlet 4.4 is beneficial to discharging the original air when the protective fluid is introduced, thereby ensuring the purity of the protective fluid in the annular cavity 4. And by arranging the overflow valve and other one-way conduction elements, the pressure value in the annular cavity 4 can be effectively controlled.

[0073] As shown in Figure 2 , the socket 2 includes a socket head 2.1 and a socket body 2.2; the socket body 2.2 is provided with a receiving groove 2.4 on the side of the plug 1 for receiving the head 102 of the cable 100; the socket body 2.2 is connected with the plug 1 through the socket head 2.1. The inner diameter of the receiving groove 2.4 is greater than the diameter of the cable 100, and the cable 100 is not in contact with the inner side wall of the receiving groove 2.4 after being inserted into the receiving groove 2.4.

[0074] The connection mode between the socket head 2.1 and the socket body 2.2 is various, which can be interference fit, threaded connection or snap ring locking, etc. Among them, the socket body 2.2 is made of insulating material, such as rubber, ceramic, PPS plastic, etc. The socket head 2.1 is made of conductive metal material such as brass. As shown in Figure 4 , the socket head 2.1 is provided with a radially outwardly convex annular connecting seat, and the annular connecting seat is provided with a connecting hole or a positioning hole. The socket head 2.1 is grounded, thereby effectively eliminating static electricity.

[0075] Further, the receiving groove 2.4 is provided with a plug-in groove 2.5 for receiving the electrical connector 101; the socket core 2.3 is arranged in the plug-in groove 2.5. More preferably, the plug-in groove 2.5 is provided with a chamfer at the mouth for guiding the insertion of the electrical connector 101.

[0076] The annular cavity 4 comprises a first annular cavity 4.1 arranged in the socket body 2.2 and sleeved outside the accommodating groove 2.4. In the axial direction of the cable 100, the bottom of the first annular cavity 4.1 protrudes the bottom of the accommodating groove 2.4, i.e. the first annular cavity 4.1 completely wraps the accommodating groove 2.4. An annular axial protrusion is arranged between the first annular cavity 4.1 and the accommodating groove 2.4. The annular axial protrusion is sleeve-shaped, and the accommodating groove 2.4 is formed on the inner side of the annular axial protrusion, and the first annular cavity 4.1 is formed on the outer side of the annular axial protrusion.

[0077] Creepage is a slight discharge phenomenon on the surface of an insulator, which is particularly obvious at the connection part of the circuit. In the present application, the connection part of the electrical connector 101 and the socket core 2.3 and the end of the head 102 of the cable 100 are most prone to creepage. In the present application, the first annular cavity 4.1 is arranged on the outer circumference of the accommodating groove 2.4 accommodating the head 102 of the cable 100. The first annular cavity 4.1, as a part of the annular cavity 4, is filled with protective fluid. The first annular cavity 4.1 effectively prevents the spread of electrons outward, limiting the creepage phenomenon within a smaller range inside the socket body 2.2. The annular axial protrusion is made of insulating material, and the arrangement of the annular axial protrusion greatly increases the creepage distance. In combination with the first annular cavity 4.1, the spread of electrons outward is further effectively prevented.

[0078] Further, the socket body 2.2 is provided with an annular groove 2.2a on the outer circumference near one end of the socket head 2.1, or a plurality of annular grooves 2.2a are arranged at intervals. The annular groove 2.2a can effectively prevent the generation or spread of creepage along the outer surface of the socket body 2.2 caused by a high-voltage electric field.

[0079] As shown in Figure 3 and 6 , the plug 1 comprises a plug body 1.1, and a through hole 1.1a is arranged in the plug body 1.1. The inner side surface of the through hole 1.1s is smooth without sharp points, avoiding the generation of discharge phenomenon. A sealing structure for sealing connection between the plug body 1.1 and the socket head 2.1 is arranged therebetween.

[0080] The cable 100 is inserted into the through hole 1.1a from the second end of the plug body 1.1, and the head 102 of the cable 100 extends out of the through hole 1.1a from the first end of the plug body 1.1. After the first end of the plug body 1.1 is sealingly connected with the socket 2, the head 102 of the cable 100 extends into the accommodating groove 2.4, and the electrical connector 101 is inserted into the socket core 2.3. The through hole 1.1a naturally forms a second annular cavity 4.2 near the head 102 of the cable 100.

[0081] Preferably, as shown in Figure 1As shown, the plug 1 further comprises a fixing nut 1.7 (or fixing ring). The outer circle of the socket head 2.1 is provided with external threads, and one end of the fixing nut 1.7 is provided with internal threads, and the other end is provided with a radially inwardly convex working ring platform. The plug body 1.1 is provided with a boss that cooperates with the working ring platform. The socket head 2.1 and the fixing nut 1.7 form a clamping sleeve structure that can be used for pipe body butt joint. After the first end of the plug body 1.1 is inserted into the middle mounting hole of the socket head 2.1, the fixing nut 1.7 is tightened on the socket head 2.1, and the fixing nut 1.7 forces the boss of the plug body 1.1 to tightly abut against the end face of the socket head 2.1 through the working ring platform, thereby realizing the sealed connection of the two. The plug body 1.1 and the socket head 2.1 can also be provided with a sealing washer to enhance the sealing performance.

[0082] The embodiment further comprises a locking device for sealingly and fixedly connecting the cable 100 and the plug body 1.1, as shown in Figure 3 and 6 As shown, the locking device comprises a wire locker 1.4 and a locking sleeve 1.3. The first end of the wire locker 1.4 abuts against the second end of the plug body 1.1, and specifically, as shown in Figure 5 the first end of the wire locker 1.4 is provided with a ring body part 1.4a, and the ring body part 1.4a is provided with an external taper surface, and the second end of the plug body 1.1 is provided with an internal taper surface that cooperates with the external taper surface. The second end of the wire locker 1.4 is provided with a plurality of elastic pieces 1.4b that are circumferentially spaced apart. One end of the locking sleeve 1.3 threadedly cooperates with the plug body 1.1, and the locking sleeve 1.3 and the plug body 1.1 have a sealing structure that prevents the protective fluid in the annular cavity 4 from overflowing. The other end of the locking sleeve 1.3 is provided with a wedge surface 1.3a. The cable 100 is inserted into the plug body 1.1 through the intermediate through hole 1.1a of the wire locker 1.4 and the locking sleeve 1.3. When the locking sleeve 1.3 is tightened, the wedge surface 1.3a forces the elastic pieces 1.4b to contract in the radial direction and tightly hold the cable 100. The inner side surface of the elastic pieces 1.4b is provided with anti-slip teeth 1.4c for holding the cable 100.

[0083] Further, the plug body 1.1, the locking sleeve 1.3, and the wire locker 1.4 are all made of electrically conductive metal materials, such as brass, stainless steel, etc. More preferably, the wire locker 1.4 is made of an elastic conductive material, such as beryllium bronze, etc.

[0084] The embodiment further comprises a shielding net 100a that is sleeved on the cable 100. The end of the shielding net 100a (i.e. one end of the cable 100 head 102) is turned up and then pressed and fixed between the plug body 1.1 and the wire locker 1.4. Specifically, as shown in Figure 5As shown, the end of the shielding net 100a is turned up and fixed between the outer and inner conical surfaces. The shielding net 100a is a woven metal wire with many apertures, which can form multiple fluid passages between the outer and inner conical surfaces, facilitating the protection of fluid passing. Because the socket head 2.1, the plug body 1.1, and the wire locker 1.4 are all made of conductive materials, when the shielding net 100a is pressed between the plug body 1.1 and the wire locker 1.4, the grounding of the shielding net 100a is realized when the socket head 2.1 is grounded.

[0085] The locking sleeve 1.3 is provided with a radially inwardly convex annular platform, and the annular platform is provided with a wedge surface 1.3a. A sealing structure (not shown), such as one or more sealing rings, is arranged between the annular platform and the cable 100 to prevent the protective fluid in the annular cavity 4 from overflowing.

[0086] More preferably, a support sleeve 1.2 made of insulating material is further included, which is arranged in the through hole 1.1a of the plug body 1.1 and sleeved on the cable 100, for preventing the cable 100 from directly contacting the plug body 1.1.

[0087] Preferably, the support sleeve 1.2 is made of high-strength insulating material, such as PPS, PTFE, PEEK, etc.

[0088] More preferably, referring to Figs. 1 and 2, Figure 9 and 10 As shown, the support sleeve 1.2 sequentially includes a right threaded portion 1.2a, a middle conical platform portion 1.2b, and a left sleeve portion 1.2c in the axial direction. The threaded portion 1.2a of the support sleeve 1.2 is fixedly connected with the plug body 1.1 in a threaded manner. The wall thickness of the conical platform portion 1.2b gradually increases from right to left, and is greater than the wall thickness of the threaded portion 1.2a and the sleeve portion 1.2c. The conical platform portion 1.2b is provided with an outer conical platform surface, and the through hole 1.1a of the plug body 1.1 is provided with an inner conical surface matched with the outer conical platform surface. The support sleeve 1.2 in the present application is in the shape of an arrow as a whole, and the conical platform portion 1.2b greatly improves its own supporting capacity, avoiding the part of the cable 100 in the plug 1 and the socket 2 directly contacting the plug 1 and the socket 2 during use. In addition, the taper of the outer conical platform surface of the conical platform portion 1.2b and the inner conical surface in the plug body 1.1 is 6:17, and the conical platform portion can make the electric field between the high pressure inside the cable 100 and the shielding layer uniformly transition, which is helpful to prevent the generation of corona and creeping.

[0089] The outer side end of the sleeve portion 1.2c is flush with or protrudes from the first end surface of the plug body 1.1, which improves its own supporting capacity and reserves a larger second annular cavity 4.2 between the sleeve portion 1.2c and the plug body 1.1 as much as possible, thereby improving the volume of the protective fluid. After the plug 1 and the socket 2 are connected, the first annular cavity 4.1 and the second annular cavity 4.2 are communicated to form the above-mentioned annular cavity 4.

[0090] The locking sleeve 1.3 is provided with an inlet 4.3; the socket body 2.2 is provided with an outlet 4.4. Referring to Figure 9 and 10 , the support sleeve 1.2 is provided with a fluid flow channel 1.2d for protecting fluid flow. Thus, the protective fluid filled from the inlet 4.3 of the locking sleeve 1.3 flows into the annular cavity 4 through the fluid flow channel. As Figure 8 shown, when inflated, the protective fluid flows into the annular cavity 4 through the inlet 4.3 and the fluid flow channel 1.2d, and the original air is discharged through the outlet 4.4, thereby forming an insulating fluid protection layer in the annular cavity 4. The pressure in the annular cavity 4 can be controlled or regulated by a pressure valve or overflow valve on the outlet 4.4.

[0091] The present embodiment also includes a folding protection sleeve 1.6 outside the cable 100, which is used to improve the bending resistance of the cable 100. Preferably, the folding protection sleeve 1.6 is fixedly connected to the locking sleeve 1.3 by clamping or screwing.

[0092] The present application provides a quick electrical connection structure for high-voltage high-frequency pulse environment, which passes protective fluid into the annular cavity 4 inside the plug 1 and the socket 2, maintains a high-strength insulating fluid protection layer around the cable 100 connection part in the annular cavity 4, reduces internal humidity, and effectively reduces the possibility of corona and creeping.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A quick electrical connection structure for use in a high-voltage high-frequency pulse environment, characterized by, The utility model relates to a kind of cable protection device, including: Plug (1), socket (2) and cable (100); The cable (100) is connected on the socket (2) by the plug (1); The plug (1) and the socket (2) inside enclose a ring cavity (4) around the cable (100) setting;The ring cavity (4) is filled with protective fluid; The plug (1) includes plug body (1.1). It further includes a locking device for sealing and fixedly connecting the cable (100) with the plug body (1.1), the locking device includes: cable lock (1.4) and locking sleeve (1.3);The first end of cable lock (1.4) is abutted on the second end of the plug body (1.1), and the second end of cable lock (1.4) is provided with a plurality of elastic sheets (1.4b) arranged in a circumferential direction;One end of the locking sleeve (1.3) is threadedly connected with the plug body (1.1), and the other end of the locking sleeve (1.3) is provided with a wedge surface (1.3a);The cable (100) is inserted into the plug body (1.1) through the through hole (1.1a) between the cable lock (1.4) and the locking sleeve (1.3), and when the locking sleeve (1.3) is tightened, the wedge surface (1.3a) forces the elastic sheet (1.4b) to contract in the radial direction and tightly hold the cable (100).

2. The quick electrical connection structure according to claim 1, characterized in that, The plug (1) or the socket (2) is provided with an inlet (4.3) for introducing the protective fluid into the ring cavity (4); The socket (2) or the plug (1) is provided with an outlet (4.4) communicating with the ring cavity (4), and the outlet (4.4) is provided with an overflow valve.

3. The quick electrical connection structure of claim 1, wherein The socket (2) is provided with a receiving groove (2.4) on the side of the plug (1) for receiving the head of the cable (100), the inner diameter of the receiving groove (2.4) is greater than the diameter of the cable (100), and the cable (100) does not contact the inner side wall of the receiving groove (2.4) after being inserted into the receiving groove (2.4).

4. The quick electrical connection structure according to claim 3, wherein The socket (2) is provided with a first ring cavity (4.1) inside, the first ring cavity (4.1) is sleeved outside the receiving groove (2.4), and the socket (2) is provided with an annular axial protrusion between the first ring cavity (4.1) and the receiving groove (2.4); The annular axial protrusion is in the form of a sleeve, and the receiving groove (2.4) is formed on the inner side of the annular axial protrusion, and the first ring cavity (4.1) is formed on the outer side of the annular axial protrusion.

5. The quick electrical connection structure according to claim 3, wherein The socket (2) includes a socket head (2.1) and a socket body (2.2), the socket body (2.2) is connected with the plug (1) through the socket head (2.1), and the socket head (2.1) is made of conductive material.

6. The quick electrical connection structure according to claim 5, wherein The socket body (2.2) is provided with an annular groove (2.2a) on the outer circle close to one end of the socket head (2.1), or a plurality of annular grooves (2.2a) are arranged at intervals.

7. The quick electrical connection structure of claim 5, wherein The plug body (1.1) is provided with a through hole (1.1a); the cable (100) is inserted into the through hole (1.1a) from the second end of the plug body (1.1), and the head (102) of the cable (100) extends out of the through hole (1.1a) from the first end of the plug body (1.1); after the first end of the plug body (1.1) is sealingly connected with the socket (2), the head (102) of the cable (100) extends into the accommodating groove (2.4).

8. The quick electrical connection structure of claim 7, wherein The plug (1) further comprises a fixing nut (1.7); the outer circle of the socket head (2.1) is provided with external threads, one end of the fixing nut (1.7) is provided with internal threads, and the other end is provided with a radially inwardly convex working ring platform; the plug body (1.1) is provided with a convex platform matched with the working ring platform.

9. The quick electrical connection structure of claim 1, wherein The inner side surface of the elastic sheet (1.4b) is provided with anti-skid teeth (1.4c) or anti-skid lines for tightly holding the cable (100).

10. The quick electrical connection structure of claim 1, wherein The first end of the cable locking device (1.4) is provided with a ring body part (1.4a) provided with an outer taper surface, and the second end of the plug body (1.1) is provided with an inner taper surface matched with the outer taper surface.

11. The quick electrical connection structure of claim 10, wherein The shielding net (100a) is further provided, which is sleeved on the cable (100), and the end of the shielding net (100a) is pressed and fixed between the plug body (1.1) and the cable locking device (1.4) after being turned up.

12. The quick electrical connection structure of claim 1, wherein The other end of the locking sleeve (1.3) is provided with a radially inwardly convex ring platform provided with the wedge surface (1.3a); a sealing structure is arranged between the ring platform and the cable (100).

13. The quick electrical connection structure of claim 7, wherein The inner diameter of the through hole (1.1a) near the one end of the socket (2) is greater than the inner diameter of the other end away from the socket (2), and the inner surface of the through hole (1.1a) is smoothly transitioned.

14. The quick electrical connection structure of claim 1, wherein The support sleeve (1.2) made of insulating material is further provided, which is arranged in the through hole (1.1a) of the plug body (1.1) and sleeved on the cable (100), so as to prevent the cable (100) from directly contacting the plug body (1.1).

15. The quick electrical connection structure of claim 14, wherein The support sleeve (1.2) is made of high-strength insulating material.

16. The quick electrical connection structure of claim 14, wherein The support sleeve (1.2) sequentially comprises a threaded part (1.2a), a conical platform part (1.2b) and a sleeve part (1.2c) in the axial direction; the wall thickness of the conical platform part (1.2b) is greater than the wall thickness of the threaded part (1.2a) and the sleeve part (1.2c), the conical platform part (1.2b) is provided with an outer conical platform surface, and the through hole (1.1a) of the plug body (1.1) is provided with an inner taper surface matched with the outer conical platform surface.

17. The quick electrical connection structure of claim 16, wherein The support sleeve (1.2) is provided with a fluid flow channel (1.2d) for the protection fluid.

Images