US-12620755-B2 - Quick electrical-connecting structure for high-voltage high-frequency pulse environment

US12620755B2US 12620755 B2US12620755 B2US 12620755B2US-12620755-B2

Abstract

A quick electrical-connecting structure for a high-voltage high-frequency pulse environment relates to the technical field of high-voltage high-frequency electrical engineering. The quick electrical-connecting structure includes a plug, a socket, and a cable, where the cable is connected to the socket through the plug; the plug and the socket internally enclose an annular cavity surrounding the cable; and a protective fluid is filled in the annular cavity. By charging a protective fluid to the annular cavity in the plug and the socket, a high-intensity insulating fluid protective layer is maintained around a connecting position of the cable in the annular cavity. Therefore, the quick electrical-connecting structure lowers an internal humidity, and can effectively reduce corona discharge and creepage.

Inventors

Xiangyu Xu
Shaohua Li
Zhao Yuan
Rui Jiang
Pei Cao

Assignees

BEIJING RSLASER OPTO-ELECTRONICS TECHNOLOGY CO., LTD

Dates

Publication Date: 20260505
Application Date: 20231024
Priority Date: 20210425

Claims (16)

1 . A quick electrical-connecting structure for a high-voltage high-frequency pulse environment, comprising a plug, a socket, and a cable, wherein the cable is connected to the socket through the plug; and the plug and the socket internally enclose an annular cavity surrounding the cable; and a protective fluid is filled in the annular cavity, wherein the socket comprises a socket head and a socket body; the socket body is connected to the plug through the socket head; and the socket head is made of a conductive material, and wherein an outer circumference of an end of the socket body adjacent to the socket head is provided with an annular groove, or is provided with a plurality of annular grooves at intervals.
2 . The quick electrical-connecting structure according to claim 1 , wherein an inlet for charging the protective fluid to the annular cavity is formed in the plug or the socket; and an outlet communicating with the annular cavity is formed in the socket or the plug; and an overflow valve is provided on the outlet.
3 . The quick electrical-connecting structure according to claim 1 , wherein a side of the socket adjacent to the plug is provided with an accommodation groove for accommodating a head of the cable; an inner diameter of the accommodation groove is greater than a diameter of the cable; and after the cable is inserted into the accommodation groove, the cable is not in contact with an inner sidewall of the accommodation groove.
4 . A quick electrical-connecting structure for a high-voltage high-frequency pulse environment, comprising a plug, a socket, and a cable, wherein the cable is connected to the socket through the plug; and the plug and the socket internally enclose an annular cavity surrounding the cable; and a protective fluid is filled in the annular cavity, wherein a side of the socket adjacent to the plug is provided with an accommodation groove for accommodating a head of the cable; an inner diameter of the accommodation groove is greater than a diameter of the cable; and after the cable is inserted into the accommodation groove, the cable is not in contact with an inner sidewall of the accommodation groove, and wherein a first annular cavity is formed in the socket; the first annular cavity is sleeved outside the accommodation groove; the socket is provided with an annular axial protrusion between the first annular cavity and the accommodation groove; and the annular axial protrusion is sleeve-shaped, wherein the accommodation groove is formed at an inner side of the annular axial protrusion, and the first annular cavity is enclosed by an outer side of the annular axial protrusion and the socket.
5 . The quick electrical-connecting structure according to claim 3 , wherein the plug comprises a plug body; a through hole is formed in the plug body; the cable is inserted into the through hole from a second end of the plug body; the head of the cable is stretched out of the through hole from a first end of the plug body; and after the first end of the plug body is connected to the socket in a sealing manner, the head of the cable is stretched into the accommodation groove.
6 . The quick electrical-connecting structure according to claim 5 , wherein the plug further comprises a fixing nut; an outer screw thread is provided on an outer circumference of the socket head; and a first end of the fixing nut is provided with an inner screw thread.
7 . The quick electrical-connecting structure according to claim 5 , wherein an inner diameter of a first end of the through hole is greater than an inner diameter of a second end of the through hole, wherein the first end of the through hole is adjacent to the socket, and the second end of the through hole is away from the socket; and an inner surface of the through hole is in smooth transition.
8 . A quick electrical-connecting structure for a high-voltage high-frequency pulse environment, comprising a plug, a socket, a cable and a locking device, wherein the cable is connected to the socket through the plug; the plug and the socket internally enclose an annular cavity surrounding the cable, and a protective fluid is filled in the annular cavity; wherein the plug comprises a plug body; a through hole is formed in the plug body; the cable is inserted into the through hole from a second end of the plug body; the head of the cable is stretched out of the through hole from a first end of the plug body; and after the first end of the plug body is connected to the socket in a sealing manner, the head of the cable is stretched into the accommodation groove; and the locking device is for sealing and fixedly connecting the cable and the plug body, wherein the locking device comprises a cable locker and a locking sleeve; a first end of the cable locker props against the second end of the plug body, and a second end of the cable locker is provided with a plurality of elastic sheets arranged circumferentially at intervals; a first end of the locking sleeve is in screw-thread fit with the plug body, and a second end of the locking sleeve is provided with a wedge-shaped surface; the cable passes through the cable locker and the locking sleeve; and when the locking sleeve is screwed, the plurality of elastic sheets are shrunk radially through the wedge-shaped surface to clasp the cable.
9 . The quick electrical-connecting structure according to claim 8 , wherein an anti-slip tooth or anti-slip pattern for clasping the cable is provided at an inner side of each of the plurality of elastic sheets.
10 . The quick electrical-connecting structure according to claim 8 , wherein the first end of the cable locker is provided with a ring portion; an outer conical surface is provided on the ring portion; and the second end of the plug body is provided with an inner conical surface cooperated with the outer conical surface.
11 . The quick electrical-connecting structure according to claim 10 , further comprising a shielding net sleeved outside the cable, wherein a tail end of the shielding net is turned up and pressed between the plug body and the cable locker.
12 . The quick electrical-connecting structure according to claim 8 , wherein the second end of the locking sleeve is provided with a radially inward-protruding annular table; the wedge-shaped surface is provided on the radially inward-protruding annular table; and a sealing structure is provided between the radially inward-protruding annular table and the cable.
13 . The quick electrical-connecting structure according to claim 8 , further comprising a support sleeve made of an insulating material, wherein the support sleeve is provided in the through hole of the plug body, sleeved on the cable, and configured to prevent the cable from directly contacting the plug body.
14 . The quick electrical-connecting structure according to claim 13 , wherein the support sleeve is made of a high-intensity insulating material.
15 . The quick electrical-connecting structure according to claim 13 , wherein the support sleeve sequentially comprises a threaded portion, a frustum-shaped portion, and a sleeve portion in an axial direction; a wall thickness of the frustum-shaped portion is greater than a wall thickness of the threaded portion and a wall thickness of the sleeve portion; the frustum-shaped portion is provided with an outer frustum-shaped surface; and an inner conical surface cooperated with the outer frustum-shaped surface is provided in the through hole of the plug body.
16 . The quick electrical-connecting structure according to claim 15 , wherein a flow channel for allowing the protective fluid to pass through is formed in the support sleeve.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS This application is the continuation application of International Application No. PCT/CN2021/112664, filed on Aug. 16, 2021, which is based upon and claims priority to Chinese Patent Application No. 202110446217.5, filed on Apr. 25, 2021, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the technical field of high-voltage high-frequency electrical engineering, and in particular to a quick electrical-connecting structure for a high-voltage high-frequency pulse environment. BACKGROUND To transmit high-voltage, high-frequency pulse energy between high-frequency magnetic compression pulse switching power supplies, corona discharge and creepage are caused easily at an electrical connector of a connecting device. With strong limitations in use, the common high-voltage connector cannot be adapted for a high-voltage, high-frequency pulse environment, such as a 30-kV, 6-KHz environment. If the common high-voltage connector is used, the connecting circuit and the connecting device are burned out easily, and the connecting device is prone to a fall or even damage. SUMMARY An objective of the present disclosure is to provide a quick electrical-connecting structure for a high-voltage high-frequency pulse environment, to solve at least one of the above problems in the prior art. To solve the above-mentioned technical problem, the present disclosure provides a quick electrical-connecting structure for a high-voltage high-frequency pulse environment, including a plug, a socket, and a cable, where the cable is connected to the socket through a plug; andthe plug and the socket internally enclose an annular cavity surrounding the cable; and a protective fluid is filled in the annular cavity. By charging a protective fluid to the annular cavity in the plug and the socket, a high-intensity insulating fluid protective layer is maintained around a connecting position of the cable in the annular cavity. Therefore, the present disclosure lowers an internal humidity, and can effectively reduce corona discharge and creepage. Further, the protective fluid is an inert fluid (such as argon and helium) or nitrogen; and the protective fluid may further be a protective oil. Further, a socket core is provided in the socket; and a front end of the cable is provided with an electrical connector cooperated with the socket core by splicing. The socket core is connected to an electrical device through a wire led out from the socket. Preferably, the socket core is made of a high-conductivity anti-corrosion material such as nickel plated copper; the electrical connector is a banana connector; the banana connector is a common elastic electrical contact structure in an electronic device; and the banana connector may be fixedly connected to the cable by welding. Further, a pressure of the protective fluid filled in the annular cavity is greater than an external atmospheric pressure. With the protective fluid in a positive pressure state in the annular cavity, the high-intensity insulating fluid protective layer can be maintained longer around the electrical connector and the socket core, and in the annular cavity. This effectively lowers the internal humidity, and achieves a longer protective effect and a better insulating effect. Further, an inlet for charging the protective fluid to the annular cavity is formed in the plug or the socket. Preferably, a one-way valve is provided on the inlet. Preferably, an air admission connector is provided on the inlet. Further, an outlet communicating with the annular cavity is formed in the socket or the plug; and an overflow valve is provided on the outlet. With the outlet, when the protective fluid is charged, original air is exhausted to ensure a purity of the protective fluid in the annular cavity. The one-way connection element such as the overflow valve can effectively control the pressure in the annular cavity. Further, a side of the socket adjacent to the plug is provided with an accommodation groove for accommodating a head of the cable; an inner diameter of the accommodation groove is greater than a diameter of the cable; and after the cable is inserted into the accommodation groove, the cable is not in contact with an inner sidewall of the accommodation groove. Further, a first annular cavity is formed in the socket; the first annular cavity is sleeved outside the accommodation groove; and the socket is provided with an annular axial protrusion between the first annular cavity and the accommodation groove. The annular axial protrusion is sleeve-shaped, where the accommodation groove is formed at an inner side of the annular axial protrusion, and the first annular cavity is enclosed by an outer side of the annular axial protrusion and the socket. Creepage is a slight discharge phenomenon on a surface of an insulator, and is particularly obvious at a docking position of a circuit. In the prese