High speed electrical interconnect structures for use in high voltage, high frequency pulsed environments.

Abstract

The present invention provides a high-speed electrical connection structure for use in a high-voltage, high-frequency pulse environment, and relates to the field of high-voltage, high-frequency electrical technology. The high-speed electrical connection structure includes a plug, a socket, and a cable. The cable is connected to the socket by the plug. The inside of the plug and the socket form an annular cavity that is arranged to surround the cable. The annular cavity is filled with a protective fluid. The present invention can effectively reduce the occurrence of corona discharge and creeping discharge by pouring the protective fluid into the annular cavity inside the plug and socket, maintaining a high-strength insulating fluid protective layer in the annular cavity and around the cable connection portion, and reducing the internal humidity.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage high-frequency electrical technology, and particularly to a high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment.

Background Art

[0002] There is a need to transmit high-voltage high-frequency pulse energy between high-frequency magnetic compression pulse switching power supplies, and corona discharge and surface discharge are likely to occur at the electrical connection part of the connection device. Currently, commonly used high-voltage connectors have significant usage limitations and are not suitable for some high-frequency pulse high-voltage environments, such as an environment with 30 kV and 6 kHz. When using ordinary high-voltage connectors, the connection circuit and connection device are likely to burn out, the connection device is likely to fall off, and in severe cases, the device may be damaged.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment in order to solve at least one of the above-described technical problems in the prior art.

Means for Solving the Problems

[0004] In order to solve the above-described technical problems, the high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment according to the present invention includes a plug, a socket, and a cable. The cable is connected to the socket by the plug, and an annular cavity is formed inside the plug and the socket so as to surround the cable. The annular cavity is filled with a protective fluid.

[0005] The present invention can effectively reduce the occurrence of corona discharge and surface discharge by flowing a protective fluid into the annular cavity inside the plug and the socket, maintaining a high-strength insulating fluid protection layer around the cable connection part inside the annular cavity, and reducing the internal humidity.

[0006] Also, the protective fluid is an inert fluid (e.g., argon, helium) or nitrogen. The protective fluid may be a protective oil or the like.

[0007] Also, a socket core is installed in the socket, and an electrical connector that is inserted and connected to the socket core to match is installed at the tip of the cable.

[0008] The socket core is connected to an electrical device by a conducting wire drawn out from the socket. Preferably, the socket core is made of a highly conductive corrosion-resistant material such as nickel-plated copper. The electrical connector is a banana head. The banana head is an elastic electrical contact structure commonly used in electronic devices. The banana head can be fixedly connected to the cable by a welding method.

[0009] Also, the pressure value of the protective fluid filled in the annular cavity is greater than the external atmospheric pressure. The positive-pressure protective fluid in the annular cavity can maintain a high-strength insulating fluid protection layer around the annular cavity, the electrical connector, and the socket core for a longer time, effectively reduce the internal humidity, have better durability of the protection effect, and better insulation effect.

[0010] Also, an inlet for flowing the protective fluid into the annular cavity is installed in the plug or socket. Preferably, a one-way valve is installed at the inlet.

[0011] More preferably, an air inlet joint is installed at the inlet.

[0012] Also, an outlet communicating with the annular cavity is installed in the socket or plug. A relief valve such as a relief valve is installed at the outlet.

[0013] The provision of an outlet also serves to expel any air that may have been present when the protective fluid was introduced, thereby ensuring the purity of the protective fluid within the annular cavity. Furthermore, the provision of a one-way conducting element such as a relief valve can effectively control the pressure within the annular cavity.

[0014] The socket also has a groove on the plug side for receiving the cable head. The inner diameter of the groove is larger than the diameter of the cable, so that when the cable is inserted into the groove, the cable does not come into contact with the inner wall of the groove.

[0015] The socket has a first annular cavity disposed therein, the first annular cavity being disposed so as to cover the outside of the receiving groove, and the socket has an annular axial protrusion disposed between the first annular cavity and the receiving groove. The annular axial protrusion is sleeve-shaped, the receiving groove is formed on its inner side, and the outer side is surrounded by the socket to form the first annular cavity.

[0016] Creeping discharge is a minute discharge that occurs on the surface of an insulator, and is particularly noticeable at the connection points of a circuit. In this application, the locations where creeping discharge is most likely to occur are the connection point between the electrical connector and the socket core, and the end of the cable head. In this application, a first annular cavity is provided on the outer periphery of the receiving groove that receives the cable head, and the first annular cavity is filled with a protective fluid as part of the annular cavity, so that the first annular cavity acts like a moat that effectively prevents electrons from spreading outward, and limits the creeping discharge to a relatively small area inside the socket body.

[0017] At least the annular axial protrusion portion of the socket is made of an insulating material, and the provision of the annular axial protrusion can significantly increase the creepage distance and, together with the first annular cavity, can more effectively prevent the outward spread of electrons.

[0018] Also, in the axial direction of the cable, the bottom of the first annular cavity is installed protruding from the bottom of the accommodation groove, and the first annular cavity completely wraps around the accommodation groove.

[0019] Also, the socket includes a socket head and a socket body. The socket body is connected to the plug by the socket head. The socket body is made of an insulating material such as rubber, ceramic, PPS plastic, etc., and the accommodation groove or the first annular cavity is installed inside the socket body.

[0020] There are various connection methods between the socket head and the socket body, such as interference fit insertion connection, screw-in connection, or snap ring fixing.

[0021] Also, a slot for receiving an electrical connector is installed at the bottom of the accommodation groove, and the socket core is installed in the slot. More preferably, a guide surface for guiding the insertion of the electrical connector is installed at the edge of the slot.

[0022] Also, the socket head is made of a conductive metal material such as brass. An annular connection seat protruding outward in the radial direction is installed on the socket head, and a connection hole or a positioning hole is provided in the annular connection seat.

[0023] Also, the socket head is connected to the ground.

[0024] Also, an annular groove is provided on the outer periphery of one end of the socket body close to the socket head, or a plurality of annular grooves are provided at intervals.

[0025] The annular groove can effectively prevent the occurrence or spread of creeping discharge along the outer surface of the socket body due to a high-voltage electric field.

[0026] Also, the plug includes a plug body, and a through hole is provided in the plug body. The cable is inserted into the through hole from the second end of the plug body. The head portion 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 hermetically connected to the socket, the head portion of the cable extends into the receiving groove.

[0027] Also, the inner surface of the through hole is smooth and has no sharp portions.

[0028] Also, a sealing structure for hermetically connecting the plug body and the socket head is installed therebetween.

[0029] More preferably, the plug further includes a fixing nut (also referred to as a fixing ring sleeve). A male thread is installed on the outer periphery of the socket head. One end of the fixing nut is provided with a female thread. The other end is provided with a radially inwardly convex operating ring base. A boss matching the operating ring base is installed on the plug body. A ferrule structure for butt-connecting the pipe bodies is formed between the socket head and the fixing nut. When the first end of the plug body is inserted into the central mounting hole of the socket head, the fixing nut is tightened to the socket head, and the operating ring base of the fixing nut forces the outer end face of the boss of the plug body to be in close contact with the end face of the socket head, thereby realizing their hermetic connection. In addition, in order to improve the sealing performance, a sealing gasket may be installed between the plug body and the socket head.

[0030] Furthermore, it further includes a locking device for hermetically fixing and connecting the cable to the plug body. The locking device includes a wire lock and a lock sleeve. The first end of the wire lock abuts against the second end of the plug body, and a plurality of elastic pieces are installed at intervals along the circumferential direction at the second end of the wire lock. One end of the lock sleeve is screwed into the plug body, and there is a sealing structure between them. A wedge-shaped surface is provided at the other end of the lock sleeve. The cable is inserted into the plug body through the through hole in the middle of the wire lock and the lock sleeve. When the lock sleeve is tightened, the wedge-shaped surface forces the elastic pieces to contract radially and clamp the cable.

[0031] Furthermore, anti-slip teeth or an anti-slip pattern for clamping the cable are installed on the inner surface of the elastic piece.

[0032] Furthermore, the plug body, the lock sleeve, and the wire lock are all made of a conductive metal material such as brass, stainless steel, etc. More preferably, the wire lock is made of an elastic conductive material such as beryllium bronze.

[0033] Furthermore, a ring body part is installed at the first end of the wire lock. An outer conical surface is provided on the ring body part. An inner conical surface matching the outer conical surface is provided at the second end of the plug body.

[0034] Furthermore, it further includes a shield net covering the outside of the cable. After the end of the shield net (i.e., one end of the cable head) is rolled up, it is press-fitted and fixed between the plug body and the wire lock. Specifically, after the end of the shield net is rolled up, it is press-fitted and fixed between the outer conical surface and the inner conical surface.

[0035] On the other end of the lock sleeve, a radially inwardly convex ring base is provided. The ring base is provided with a wedge surface. A sealing structure is installed between the ring base and the cable, for example, one or several seal rings or the like.

[0036] Also, the inner diameter of one end of the through hole near the socket is larger than the inner diameter of the end far from the socket, and the inner surface of the through hole smoothly transitions (changes).

[0037] It further includes a support sleeve made of an insulating material. The support sleeve is installed in the through hole of the plug body and further covers the cable to prevent the cable from directly contacting the plug body.

[0038] Preferably, the support sleeve is made of a high-strength insulating material such as PPS, PTFE, PEEK, etc.

[0039] Also, the support sleeve is fixedly connected to the plug body by a screwing method, a plug-in connection or a snap connection method.

[0040] Also, the support sleeve includes a threaded portion, a frustum portion and a sleeve portion in the axial direction in sequence. The wall thickness of the frustum portion is larger than the wall thickness of the threaded portion and the sleeve portion. An outer conical surface is provided on the frustum portion, and an inner conical surface corresponding to the outer conical surface is provided in the through hole of the plug body.

[0041] The support sleeve of the present application is generally in the shape of an arrow as a whole. The frustum of a cone greatly enhances its own support capacity and avoids the part inside the plug or socket of the cable from directly contacting the plug or socket during use. The outer end of the sleeve part is flush with the first end face of the plug body or is installed protruding from the first end face of the plug body. While improving its own support capacity, a relatively large second annular cavity is ensured as much as possible between the sleeve part and the plug body. Therefore, when the volume of the protective fluid increases and the plug and socket are connected, the first annular cavity and the second annular cavity communicate with each other to form the above-mentioned annular cavity.

[0042] In addition, an inlet is installed on the lock sleeve, and an outlet is installed on the socket body.

[0043] In addition, a fluid flow path for the protective fluid to pass through is installed in the support sleeve. This makes it easier for the protective fluid filled from the inlet of the lock sleeve to flow into the annular cavity through the fluid flow path.

[0044] Furthermore, it further includes a breakage prevention sleeve that covers the outside of the cable to improve the bending resistance of the cable. Preferably, the breakage prevention sleeve and the lock sleeve are fixedly connected by a snap connection method or a screwing connection method.

Advantages of the Invention

[0045] By using the above-mentioned technical solution, the following beneficial effects can be obtained.

[0046] The high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment according to the present invention flows a protective fluid into the annular cavities inside the plug and the socket, maintains a high-strength insulating fluid protection layer around the cable connection part inside the annular cavity, and reduces the internal humidity, thereby effectively reducing the occurrence of corona discharge and surface discharge.

Brief Description of the Drawings

[0047] To more clearly explain the specific embodiments of the present invention or the technical solutions of the prior art, the drawings necessary for 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, and those skilled in the art can also obtain other drawings based on these drawings without creative labor.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0048] Hereinafter, with reference to the drawings, the technical solutions of the present invention will be described more clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present invention.

[0049] In the description of the present invention, the directions or positional relationships indicated by technical terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are for the purpose of explaining the present invention and simplifying the explanation, and do not imply or suggest that the mentioned devices or elements should have a specific direction, should be configured in a specific direction, or should operate, so it should not be construed as limiting the present invention. Also, the technical terms "first", "second", "third", etc. are used only for the purpose of explanation and should not be construed as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the technical terms "attach", "connect to each other", "connect" should be understood in a broad sense. For example, it may be fixedly connected, removably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or a communication inside two elements. Those skilled in the art can understand the specific meanings of the above-mentioned technical terms in the present invention according to specific situations.

[0051] Hereinafter, the present invention will be further interpreted and described with reference to specific embodiments.

[0052] As shown in FIGS. 1 to 10, the high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment according to this embodiment includes a plug 1, a socket 2, and a cable 100. The cable 100 is connected to the socket 2 by the plug 1. Inside the plug 1 and the socket 2, an annular cavity 4 is formed so as to surround the cable 100. The annular cavity 4 is filled with a protective fluid. Specifically, the annular cavity 4 is formed by connecting the first half cavity in the plug 1 and the second half cavity in the socket 2 respectively, and when the cable 100 passes through the two half cavities, an annular cavity is formed.

[0053] The present invention can effectively reduce the occurrence of corona discharge and surface discharge by flowing a protective fluid into the annular cavities 4 inside the plug 1 and the socket 2, maintaining a high-strength insulating fluid protection layer around the cable 100 connection site inside the annular cavity 4, and reducing the internal humidity.

[0054] Also, it is preferable to use an inert gas such as argon or helium as the protective fluid, and the protective fluid may also be a protective oil or the like.

[0055] As shown in FIG. 2, a socket core 2.3 is installed inside the socket 2. An electrical connector 101 that is inserted and connected to the socket core 2.3 for matching is installed at the tip of the cable 100.

[0056] The socket core 2.3 is connected to an electrical device by a wire drawn out from the socket 2. Preferably, the socket core 2.3 is made of a high-conductivity corrosion-resistant material such as nickel-plated copper. The electrical connector 101 is a banana head. The banana head is an elastic electrical contact structure commonly used in electronic devices. The banana head can be fixedly connected to the cable 100 by a welding method.

[0057] Also, the pressure value of the protective fluid filled inside the annular cavity 4 is greater than the external atmospheric pressure. The positive-pressure protective fluid inside the annular cavity 4 can maintain a high-strength insulating fluid protection layer around the annular cavity 4, the electrical connector 101, and the socket core 2.3 for a longer time, effectively reduce the internal humidity, have better durability of the protection effect, and have better insulation effect.

[0058] As shown in Fig. 3, the plug 1 is provided with an inlet 4.3 for flowing a protective fluid into the annular cavity 4. An air inlet joint 1.5 is installed at the inlet 4.3. A one-way valve (not shown) is installed at the air inlet joint 1.5. The socket 2 is provided with an outlet 4.4 communicating with the annular cavity 4. A relief valve such as a relief valve (not shown) is installed at the outlet 4.4. The installation of the outlet 4.4 helps to discharge the original air when the protective fluid is flowed in. Therefore, the purity of the protective fluid in the annular cavity 4 can be guaranteed. Also, by installing a one-way conduction element such as a relief valve, the pressure value in the annular cavity 4 can be effectively controlled.

[0059] As shown in Fig. 2, the socket 2 includes a socket head 2.1 and a socket body 2.2. On the side of the socket body 2.2 facing the plug 1, a receiving groove 2.4 for receiving the head portion 102 of the cable 100 is installed. The socket body 2.2 is connected to the plug 1 by the socket head 2.1. The inner diameter of the receiving groove 2.4 is larger than the diameter of the cable 100, and when the cable 100 is inserted into the receiving groove 2.4, it does not contact the inner wall of the receiving groove 2.4.

[0060] There are various connection methods between the socket head 2.1 and the socket body 2.2, such as interference fit insertion connection, screw-in connection, or snap ring fixing. Also, the socket body 2.2 may be made of an insulating material such as rubber, ceramic, PPS plastic, etc. The socket head 2.1 may be made of a conductive metal material such as brass. As shown in Fig. 4, the socket head 2.1 is provided with an annular connection seat protruding outward in the radial direction, and a connection hole or a positioning hole is installed in the annular connection seat. The socket head 2.1 is grounded to effectively remove static electricity.

[0061] A slot 2.5 for receiving the electrical connector 101 is provided at the bottom of the receiving groove 2.4, and the socket core 2.3 is installed in the slot 2.5. More preferably, the edge of the slot 2.5 is provided with a chamfer to guide the insertion of the electrical connector 101.

[0062] The annular cavity 4 includes a first annular cavity 4.1 disposed within the socket body 2.2, which covers the outside of the receiving groove 2.4. In the axial direction of the cable 100, the bottom of the first annular cavity 4.1 protrudes from the bottom of the receiving groove 2.4, i.e., the first annular cavity 4.1 completely encloses the receiving groove 2.4. An annular axial protrusion is disposed between the first annular cavity 4.1 and the receiving groove 2.4. The annular axial protrusion is sleeve-shaped, and the receiving groove 2.4 is formed inside the annular axial protrusion. The first annular cavity 4.1 is formed by surrounding the socket 2 on the outside.

[0063] Creeping discharge is a minute discharge that occurs on the surface of an insulator and is particularly noticeable at circuit connection points. In this application, creeping discharge is most likely to occur at the connection point between the electrical connector 101 and the socket core 2.3, and at the end of the head portion 102 of the cable 100. In this application, a first annular cavity 4.1 is provided around the outer periphery of the receiving groove 2.4 that receives the head portion 102 of the cable 100. The first annular cavity 4.1 is filled with a protective fluid as part of the annular cavity 4.1, which acts as a moat that effectively prevents electrons from spreading outward, confining creeping discharge to a relatively small area within the socket body 2.2. The annular axial protrusion is made of an insulating material. The provision of the annular axial protrusion significantly increases the creeping distance, which, together with the first annular cavity 4.1, more effectively prevents electrons from spreading outward.

[0064] In addition, an annular groove 2.2a is provided on the outer periphery of one end of the socket body 2.2 close to the socket head 2.1, or a plurality of annular grooves 2.2a are provided at intervals. The annular groove 2.2a can effectively prevent the occurrence or spread of creeping discharge along the outer surface of the socket body 2.2 due to a high-voltage electric field.

[0065] As shown in FIGS. 3 and 6, the plug 1 includes a plug body 1.1, and a through hole 1.1a is provided in the plug body 1.1. Since the inner surface of the through hole 1.1a is smooth and has no sharp parts, the occurrence of a discharge phenomenon can be avoided. A sealing structure for sealingly connecting the two is provided between the plug body 1.1 and the socket head 2.1.

[0066] The cable 100 is inserted into the through hole 1.1a from the second end of the plug body 1.1. The head portion 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 to the socket 2, the head portion 102 of the cable 100 extends into the accommodation groove 2.4. The electrical connector 101 is inserted into the slot 2.5 and connected to the socket core 2.3. The through hole 1.1a naturally forms a second annular cavity 4.2 in the vicinity of the head portion 102 of the cable 100.

[0067] Preferably, as shown in FIG. 1, the plug 1 further includes a fixing nut 1.7 (also referred to as a fixing ring sleeve). A male thread is installed on the outer periphery of the socket head 2.1. One end of the fixing nut 1.7 is provided with a female thread, and the other end is provided with a radially inward convex operating ring base. The plug body 1.1 is provided with a boss that matches the operating ring base. A ferrule structure for butt-connecting the pipe body is formed between the socket head 2.1 and the fixing nut 1.7. When the first end of the plug body 1.1 is inserted into the central mounting hole of the socket head 2.1, the fixing nut 1.7 is tightened to the socket head 2.1, and the fixing nut 1.7 is forced by its operating ring base to make the outer end face of the boss of the plug body 1.1 in close contact with the end face of the socket head 2.1, thereby realizing a sealed connection between the two. In addition, in order to improve the sealing performance, a seal gas gasket may be installed between the plug body 1.1 and the socket head 2.1.

[0068] This embodiment further includes a locking device for hermetically fixing and connecting the cable 100 to the plug body 1.1. As shown in FIGS. 3 and 6, the locking device includes a wire lock 1.4 and a lock sleeve 1.3. The first end of the wire lock 1.4 is in contact with the second end of the plug body 1.1. Specifically, as shown in FIG. 5, a ring body portion 1.4a is installed at the first end of the wire lock 1.4. An outer conical surface is installed on the ring body portion 1.4a. An inner conical surface that matches the outer conical surface is installed at the second end of the plug body 1.1. A plurality of elastic pieces 1.4b are installed at the second end of the wire lock 1.4 at intervals along the circumferential direction. One end of the lock sleeve 1.3 is screwed into the plug body 1.1. There is a sealing structure between the lock sleeve 1.3 and the plug body 1.1 to prevent the protective fluid from overflowing, thereby preventing the protective fluid in the annular cavity 4 from overflowing. A wedge surface 1.3a is provided at the other end of the lock sleeve 1.3. The cable 100 is inserted into the plug body 1.1 through the through hole 1.1a in the middle of the wire lock 1.4 and the lock sleeve 1.3. When the lock sleeve 1.3 is tightened, the wedge surface 1.3a radially contracts the elastic pieces 1.4b and forcibly biases (urges) the cable 100 to hold it. Anti-slip teeth 1.4c for holding the cable 100 are installed on the inner surface of the elastic piece 1.4b.

[0069] Also, the plug body 1.1, the lock sleeve 1.3, and the wire lock 1.4 are all made of a conductive metal material such as brass, stainless steel, etc. More preferably, the wire lock 1.4 is made of an elastic conductive material such as beryllium bronze.

[0070] This embodiment further includes a shield net 100a covering the outside of the cable 100. After the end of the shield net 100a (i.e., one end of the head portion 102 of the cable 100) is rolled up, it is press-fitted and fixed between the plug body 1.1 and the wire lock 1.4. Specifically, as shown in FIG. 5, after the end of the shield net 100a is rolled up, it is press-fitted and fixed between the outer conical surface and the inner conical surface. The shield net 100a is a braided metal wire having a large number of pores, and in order to facilitate the passage of the protective fluid, a plurality of fluid flow paths can be formed between the outer conical surface and the inner conical surface. Since the socket head 2.1, the plug body 1.1, and the wire lock 1.4 are all made of conductive materials, after the shield net 100a is pressed against the plug body 1.1 and the wire lock 1.4, when the socket head 2.1 is grounded, the grounding of the shield net 100a is realized.

[0071] On the lock sleeve 1.3, a convex ring base is installed inward in the radial direction. On the ring base, a wedge-shaped surface 1.3a is installed. A sealing structure (not shown) is installed between the ring base and the cable 100 to prevent the protective fluid in the annular cavity 4 from overflowing. The sealing structure is, for example, one or several seal rings, etc.

[0072] More preferably, it further includes a support sleeve 1.2 made of an insulating material. The support sleeve 1.2 is installed in the through hole 1.1a of the plug body 1.1 and covers the cable 100, thereby preventing the cable 100 from directly contacting the plug body 1.1.

[0073] Preferably, the support sleeve 1.2 is made of a high-strength insulating material such as PPS, PTFE, PEEK, etc.

[0074] More preferably, as shown in FIGS. 9 and 10, the support sleeve 1.2 includes a threaded portion 1.2a on the right side, a frustum portion 1.2b in the middle, and a sleeve portion 1.2c on the left side in the axial direction. The threaded portion 1.2a of the support sleeve 1.2 is fixedly connected to the plug body 1.1 by a screwing method. The wall thickness of the frustum portion 1.2b gradually increases from right to left, and is larger than the wall thicknesses of the threaded portion 1.2a and the sleeve portion 1.2c everywhere. An outer conical surface is provided on the frustum portion 1.2b. An inner conical surface corresponding to the outer conical surface is provided in the through hole 1.1a of the plug body 1.1. The support sleeve 1.2 of the present application is generally in the shape of an arrow. The frustum portion 1.2b greatly enhances its own supporting ability, and it is possible to avoid the part in the plug 1 or the socket 2 of the cable 100 directly contacting the plug 1 or the socket 2 during use. Incidentally, the taper of the outer conical surface of the frustum portion 1.2b and the inner conical surface in the plug body 1.1 is 6:17. The frustum portion can uniformly transfer the electric field between the high voltage in the cable 100 and the shield layer, thus contributing to preventing the occurrence of corona discharge and surface discharge.

[0075] Since the outer end of the sleeve portion 1.2c is flush with the first end surface of the plug body 1.1 or is installed protruding from the first end surface of the plug body 1.1, while improving its own supporting ability, a relatively large second annular cavity 4.2 is ensured as much as possible between the sleeve portion 1.2c and the plug body 1.1. Therefore, when the volume of the protective fluid increases and the plug 1 and the socket 2 are connected, the first annular cavity 4.1 and the second annular cavity 4.2 communicate with each other to form the annular cavity 4 described above.

[0076] An inlet 4.3 is provided in the lock sleeve 1.3. An outlet 4.4 is provided in the socket body 2.2. As shown in FIGS. 9 and 10, a fluid flow path 1.2d for the protective fluid to pass through is provided in the support sleeve 1.2. Therefore, the protective fluid flowing in from the inlet 4.3 of the lock sleeve 1.3 can easily flow into the annular cavity 4 through the fluid flow path. As shown in FIG. 8, during gas filling, the protective fluid passes through the inlet 4.3, flows into the annular cavity 4 through the fluid flow path 1.2d, and the original air is discharged through the outlet 4.4. Therefore, an insulating fluid protection layer is formed in the annular cavity 4. The pressure in the annular cavity 4 can be controlled or adjusted by the pressure valve or relief valve at the outlet 4.4.

[0077] This embodiment further includes a bend (bending) prevention sleeve 1.6 covering the outside of the cable 100 to improve the bending resistance of the cable 100. Preferably, the bend prevention sleeve 1.6 and the lock sleeve 1.3 are fixedly connected by a snap connection method or a screwing connection method.

[0078] The high-voltage high-frequency pulse environment high-speed electrical connection structure according to the present invention flows a 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 connection part of the electrical connector 100 in the annular cavity 4, reduces the internal humidity, and can effectively reduce the occurrence of corona discharge and surface discharge.

[0079] Finally, it should be noted that each of the above-described embodiments is only used to explain the technical solution of the present invention and does not limit the present invention. The present invention has been described in detail with reference to each of the above-described embodiments. Those skilled in the art can change the technical solutions described in each of the above embodiments, or can equivalently replace some or all of the technical features, but it should be understood that these modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of each embodiment of the present invention.

Explanation of Reference Numerals

[0080] 1 Plug 1.1 Plug body 1.1a Through-hole 1.2 Support sleeve 1.2a Threaded part 1.2b Frustum part 1.2c Sleeve part 1.2d Fluid flow path 1.3 Lock sleeve 1.3a Wedge surface 1.4 Wire lock 1.4a Ring body part 1.4b Elastic piece 1.4c Anti-slip teeth 1.5 Air inlet joint 1.6 Anti-break 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 Receiving groove 2.5 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 part 100a Shield net

Claims

1. A high-speed electrical connection structure for use in a high-voltage high-frequency pulse environment, including a plug (1), a socket (2) and a cable (100), the cable (100) is connected to the socket (2) by the plug (1), an annular cavity (4) is formed inside the plug (1) and the socket (2) and is installed so as to surround the cable (100), the annular cavity (4) is filled with a protective fluid, the plug (1) includes a plug body (1.1), and a through hole (1.1a) is installed inside the plug body (1.1), an inlet (4.3) for flowing the protective fluid into the annular cavity (4) is provided in the plug (1) or the socket (2), an outlet (4.4) communicating with the annular cavity (4) is provided in the socket (2) or the plug (1), a relief valve is installed at the outlet (4.4), further including a support sleeve (1.2) made of an insulating material, the support sleeve (1.2) is installed inside the through hole (1.1a) of the plug body (1.1), and by covering the cable (100), it prevents the cable (100) from directly contacting the plug body (1.1), the support sleeve (1.2) includes a threaded portion (1.2a), a frustum portion (1.2b) and a sleeve portion (1.2c) in the axial direction in sequence. The wall thickness of the frustum portion (1.2b) is larger than the wall thicknesses of the threaded portion (1.2a) and the sleeve portion (1.2c). An outer conical surface is provided on the frustum portion (1.2b), and an inner conical surface corresponding to the outer conical surface is provided inside the through hole (1.1a) of the plug body (1.1). The high-speed electrical connection structure is characterized by this.

2. On the side of the socket (2) facing the plug (1), a receiving groove (2.4) for receiving the head portion of the cable (i00) is provided. The inner diameter of the receiving groove (2.4) is larger than the diameter of the cable (100). When the cable (100) is inserted into the receiving groove (2.4), the cable (100) does not contact the inner wall of the receiving groove (2.4). The high-speed electrical connection structure according to Claim 1, characterized by this.

3. Inside the socket (2), a first annular cavity (4.1) is provided. The first annular cavity (4.1) is installed so as to cover the outside of the accommodation groove (2.4). The socket (2) has an annular axial protrusion installed between the first annular cavity (4.1) and the accommodation groove (2.4). The annular axial protrusion is sleeve-shaped, with the accommodation groove (2.4) formed inside it, and the outside surrounding the socket (2) to form the first annular cavity (4.1). The high-speed electrical connection structure according to claim 2, characterized in that.

4. The socket (2) includes a socket head (2.1) and a socket body (2.2). The socket body (2.2) is connected to the plug (1) by the socket head (2.1). The socket head (2.1) is made of a conductive material. The high-speed electrical connection structure according to claim 1, characterized in that.

5. On the outer periphery of one end of the socket body (2.2) close to the socket head (2.1), one annular groove (2.2a) or a plurality of annular grooves (2.2a) are provided at intervals. The high-speed electrical connection structure according to claim 4, characterized in that.

6. The cable (100) is inserted into the through hole (1.1a) from the second end of the plug body (1.1). The head portion (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 hermetically connected to the socket (2), the head portion (102) of the cable (100) extends into the accommodation groove (2.4). The high-speed electrical connection structure according to claim 2, characterized in that.

7. The plug (1) further includes a fixing nut (1.7). On the outer periphery of the socket head (2.1), a male thread is provided. One end of the fixing nut (1.7) is provided with a female thread, and the other end is provided with a radially inward convex operating ring base. On the plug body (1.1), a boss matching the operating ring base is provided. The high-speed electrical connection structure according to claim 4, characterized in that.

8. The high-speed electrical connection structure according to claim 1, further comprising a locking device for hermetically fixing and connecting the cable (100) to the plug body (1.1), the locking device including a wire lock (1.4) and a lock sleeve (1.3), a first end of the wire lock (1.4) abuts against a second end of the plug body (1.1), a plurality of elastic pieces (1.4b) are installed at intervals along the circumferential direction at a second end of the wire lock (1.4), one end of the lock sleeve (1.3) is screwed into the plug body (1.1), a wedge-shaped surface (1.3a) is provided at the other end of the lock sleeve (1.3), the cable (100) is inserted into the plug body (1.1) through a through hole (1.1a) in the middle of the wire lock (1.4) and the lock sleeve (1.3), when the lock sleeve (1.3) is tightened, the wedge-shaped surface (1.3a) radially contracts the elastic pieces (1.4b) and forces the cable (100) to be clamped.

9. The high-speed electrical connection structure according to claim 8, wherein an anti-slip tooth (1.4c) or an anti-slip pattern for clamping the cable (100) is installed on an inner surface of the elastic piece (1.4b).

10. The high-speed electrical connection structure according to claim 8, wherein a ring body portion (1.4a) is installed at a first end of the wire lock (1.4), an outer conical surface is installed on the ring body portion (1.4a), and an inner conical surface matching the outer conical surface is installed at a second end of the plug body (1.1).

11. The high-speed electrical connection structure according to claim 10, further comprising a shield net (100a) covering the outside of the cable (100), and after the end of the shield net (100a) is rolled up, it is press-fitted and fixed between the plug body (1.1) and the wire lock (1.4).

12. The high-speed electrical connection structure according to claim 8, wherein a radially inward convex ring base is installed at the other end of the lock sleeve (1.3), the wedge-shaped surface (1.3a) is installed on the ring base, and a sealing structure is installed between the ring base and the cable (100).

13. The high-speed electrical connection structure according to claim 6, wherein the through-hole (1.1a) has an inner diameter at one end closer to the socket (2) that is larger than the inner diameter at one end farther from the socket (2), and the inner surface of the through-hole (1.1a) transitions smoothly.

14. The high-speed electrical connection structure according to claim 1, wherein the support sleeve (1.2) is made of a high-strength insulating material.

15. The high-speed electrical connection structure according to claim 1, wherein a fluid flow path (1.2d) for the protective fluid to pass through is provided in the support sleeve (1.2).

Images