A high-voltage and high-current quick connector

Abstract

The present invention relates to a high-voltage, high-current quick connector, which consists of a plug and a socket for plug-in connection. The plug is used to connect an energy cable, and the socket is used to connect a xenon lamp cable. The plug and socket shells are made of polytetrafluoroethylene, and the wall thickness is designed according to the pressure resistance requirements. The plug and socket shells adopt a mutually nested concentric ring structure to ensure solid breakdown insulation while increasing creepage insulation. The inner core material of the plug and socket electrical connection is brass with a surface tinning process. The plug and socket electrical connection plug position uses a strap spring, and the current capacity requirements are met by increasing the number of strap springs used. The plug and socket have an adjustment margin during the plug-in and pull-out process, and position compensation is performed in the form of different plug-in and pull-out depths. The beneficial effects are compact structure, high-voltage resistance, and fast plug-in and pull-out.

Description

Technical field

[0001] The present invention relates to the technical field of high-power solid-state lasers, and in particular to a high-voltage and high-current quick connector. [Background Technology]

[0002] Over the past 30 years of development, high-power solid-state laser drivers have seen rapid advancements in laser driver technology, with single-channel output energies increasing and operating frequencies significantly increasing. As the core module in ultra-high-power laser drivers, the slab laser amplifier provides 99% of the device's energy. Its energy comes from an array of high-energy pulsed xenon lamps. A power cable applies high voltage to both ends of the xenon lamps, stimulating them to emit intense light. This intense light is absorbed by the neodymium glass and converted into stored energy. After the laser seed passes through, this energy is extracted and amplified. Each slab laser amplifier module contains several lamphouses, which primarily provide pump energy for the slab laser amplifier. Each lamphouse houses more than ten large-aperture pulsed xenon lamps. Two pulsed xenon lamps are connected in series, with the cables at both ends connected to the pulse-shaping network via cable connectors. Within the entire system, each xenon lamp requires significant energy, requiring high voltage and current density to power the lamps. Highly reliable plug and socket connections are crucial. All components of the slab laser amplifier are installed from the bottom up, necessitating the following technical requirements for the cable connectors:

[0003] First, high voltage resistance: Xenon lamps operate at high voltage and high current. Their normal operating parameters are required to be tens of kilovolts. The voltage resistance of cable connectors cannot be lower than this value; and the current carrying capacity of the connectors should also be tens of kiloamperes.

[0004] Second, quick plug-in and quick-out improves cable connection efficiency and reduces unnecessary work time. The end of the cable connecting the xenon lamp is soldered to the corresponding socket and pin. When installing or removing, just plug in or unplug the socket and you're done.

[0005] Third, position compensation can prevent improper connection caused by the displacement of the xenon lamp position. During the rising process of the xenon lamp array of the light box, if the installation dimensions of the xenon lamp or the connector deviate, the connector will be damaged during the plugging and unplugging process. Due to the high cleanliness requirements of the light box, manual intervention is not allowed during the plugging and unplugging process, so the connector needs to adjust itself according to the position deviation.

[0006] Therefore, there is an urgent need for a quick connector that can meet the requirements of faster plugging and unplugging under high pressure resistance.

[0007] The present invention makes technical improvements in view of the technical requirements of the cable connector of a sheet-shaped laser amplifier module. [Summary of the invention]

[0008] The object of the present invention is to provide a cable connector which has a compact structure, is resistant to high pressure and can be quickly plugged and unplugged.

[0009] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is a high-voltage and high-current quick connector, which consists of a plug and a socket for plug-in connection, the plug is used to connect the energy cable, and the socket is used to connect the xenon lamp cable; the plug and socket shell material is polytetrafluoroethylene, and the wall thickness is designed according to the pressure resistance requirements; the plug and socket shell adopts a mutually nested concentric ring structure to ensure solid breakdown insulation while increasing creepage insulation; the inner core material of the plug and socket electrical connection is brass with a surface tinning process; the plug and socket electrical connection plug position uses a strap reed, and the overcurrent capacity requirements are met by increasing the number of strap reeds used; the plug and socket have adjustment margin during the plug-in and pull-out process, and position compensation is performed in the form of different plug-in and pull-out depths.

[0010] Preferably, the outer walls of the external insulating bodies of the plug and socket are wrapped with double-conductor copper foil tape for encapsulation, thereby effectively blocking the propagation of electromagnetic interference.

[0011] Preferably, the mutually nested concentric ring structures adjust the insulating tooth length and tooth width according to the voltage.

[0012] Furthermore, the plug and the socket have similar internal structures and the same construction principles.

[0013] Preferably, the plug includes an external insulating body of the plug, an internal insulating body of the plug, an inner core of the plug and an energy cable bolt fastener; the external insulating body of the plug is assembled with the inner insulating body of the plug and fixed by four threaded holes on the outside; the inner core of the plug is sleeved in the inner insulating body of the plug, and the outer insulating body of the plug is used to support the inner core of the plug for limiting and clamping; the socket includes an external insulating body of the socket, an inner insulating body of the socket, an inner core of the socket and a xenon lamp cable bolt fastener; the external insulating body of the socket is assembled with the inner insulating body of the socket and fixed by four threaded holes on the outside; the inner core of the socket is sleeved in the inner insulating body of the socket, and the outer insulating body of the socket is used to support the inner core of the socket for limiting and clamping.

[0014] Preferably, the energy cable bolt fastener is used to fix the square wire nose crimped on the end of the energy cable, and the energy cable passes through the inner insulating body of the plug, keeps coaxial, and then passes through the outer insulating body of the plug; the xenon lamp cable bolt fastener is used to fix the square wire nose crimped on the end of the xenon lamp cable, and the xenon lamp cable passes through the inner insulating body of the socket, keeps coaxial, and then passes through the outer insulating body of the socket.

[0015] Preferably, the inner core of the plug is made of brass and is tin-plated on the surface. One end is threadedly fastened to the end of the energy cable, and the other end is a plate structure. The end of the plate structure has an external chamfered structure for plugging into the inner core of the socket; the inner core of the socket is made of brass and is tin-plated on the surface. One end is threadedly fastened to the end of the xenon lamp cable, and the other end is a block structure with a dovetail groove. The end of the block structure has an internal chamfered structure for plugging into the inner core of the plug.

[0016] Preferably, the watchband contacts are arranged in the dovetail groove of the socket inner core, the opposite sides of the plug inner core are 0.5 mm smaller than the inner hole of the socket inner core, and the length of the inner core and the number of watchband contacts are adjusted according to the current size.

[0017] Preferably, during the plugging and unplugging process of the plug and socket, the plane freedom is compensated by the width margin between the external slide and the inner core of the plug and socket, and the plugging and unplugging direction freedom is compensated by the gap left after the plug and socket are inserted.

[0018] Furthermore, the high-voltage, high-current quick connector is used for electrically connecting a large-diameter pulse xenon lamp in a sheet laser amplifier module light box; the outer insulating body end of the plug has four mounting holes for mounting and fixing with the outer flange of the fixing bracket; the outer insulating body end of the socket has four mounting holes for mounting and fixing with the outer flange of the light box bracket; the socket is driven to move up and down by the vertical up and down movement of the light box bracket, and is plugged in and out of the plug.

[0019] The high-voltage and high-current quick connector of the present invention has the following beneficial effects: based on structural design and parameter optimization, it solves the defects of general connectors that have low voltage resistance and overcurrent capabilities and are inconvenient to plug and unplug. Through structural improvements, the connector is more compact, and the voltage resistance and overcurrent capabilities are significantly improved, while also having both quick plug-in effect and electromagnetic shielding function.

Brief Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of the overall structure of a high-voltage and high-current quick connector.

[0021] Figure 2 It is a three-dimensional schematic diagram of the plugging and unplugging of a high-voltage and high-current quick connector.

[0022] The reference numerals and components involved in the accompanying drawings are as follows: 11. External insulating body of the plug, 12. Internal insulating body of the plug, 13. Inner core of the plug, 14. Energy cable, 15. Energy cable fastening screw, 21. External insulating body of the socket, 22. Internal insulating body of the socket, 23. Inner core of the socket, 24. Xenon lamp cable, 25. Xenon lamp cable fastening screw. [Specific implementation method]

[0023] The present invention will be further described below in conjunction with embodiments and with reference to the accompanying drawings.

[0024] Example

[0025] This embodiment realizes a high-voltage and high-current quick connector.

[0026] This embodiment of a high-voltage and high-current quick connector takes a cable quick connector with a withstand voltage requirement of 60kV and an overcurrent requirement of 25kA as an example to illustrate the specific implementation of the present invention.

[0027] This embodiment describes the design concept of a high-voltage and high-current quick connector from four aspects: insulation design, overcurrent design, position compensation design and electromagnetic shielding design.

[0028] This embodiment of a high-voltage and high-current quick connector insulation design is considered from two aspects: direct breakdown and creepage breakdown. In terms of direct breakdown, the design is mainly based on the material and wall thickness of the shell. In this design, polytetrafluoroethylene material is selected, and its pressure breakdown strength is ≥10kV / mm. According to its different pressure requirements, the minimum wall thickness of the shell is designed to be 6mm, meeting the pressure requirement of 60kV. In terms of creepage breakdown, the design is mainly based on the surface distance of the material between the two poles and between the electrode and the ground. The pressure creepage strength of polytetrafluoroethylene is ≥500V / mm. According to its different pressure requirements, the minimum surface creepage distance is designed to be 120mm, meeting the pressure requirement of 60kV.

[0029] This embodiment implements an overcurrent design for a high-voltage, high-current quick connector. The material design of the connector's electrical connection core is brass, and the surface is tinned to improve the structural strength while meeting the requirement of low contact resistance. A watch strap reed is designed at the plug-in position, and its material has excellent elasticity and good conductivity. The instantaneous short-circuit current of a single contact leaf is 0.6kA. At a current intensity of 25kA, 40 leaves are required. Based on this, the cross-section of the battery cell is designed according to the size of the reed. At the same time, when the current intensity increases, the overcurrent capacity requirements can be met by increasing the number of reeds used. It only needs to increase the corresponding size in the length direction of the connector, which has the characteristics of high scalability.

[0030] This paper proposes a position compensation design for high-voltage and high-current quick connectors. The connector design allows for adjustment margins during the plugging and unplugging process, providing position compensation in the form of varying plugging and unplugging depths.

[0031] This paper presents an electromagnetic shielding design for a high-voltage, high-current quick connector. By wrapping a double-conducting copper foil tape around the outer wall of the external insulating body for encapsulation, it can be protected from the influence of the external electromagnetic field and effectively block the propagation path of electromagnetic interference.

[0032] Figure 1It is a cross-sectional view of the overall structure of a high-voltage and high-current quick connector. Figure 2 This is a three-dimensional schematic diagram of the plug-in and pull-out of a high-voltage and high-current quick connector. Figure 1 , Attachment Figure 2 As shown, this embodiment is a high-voltage and high-current quick connector, in which the outer insulating body 11 of the plug is nested and assembled with the inner insulating body 12 of the plug and fixed through four threaded holes on the outside, and the inner core 13 of the plug is sleeved in the inner insulating body 12 of the plug, and the outer insulating body 11 of the plug is used to support the inner core 13 of the plug to achieve the purpose of limiting and clamping.

[0033] This embodiment provides a high-voltage and high-current quick connector. The energy cable 14 is wrapped with a high-voltage heat shrink tube on the outside to further strengthen the insulation. The end is crimped with a square wire nose and fixed to the inner core 13 of the plug through the energy cable fastening screw 15. The energy cable 14 passes through the internal insulating body 12 of the plug, maintains coaxiality, and then passes through the external insulating body 11 of the plug.

[0034] The socket part is the same as the plug part. Figure 1 , Attachment Figure 2 As shown, the present embodiment is a high-voltage and high-current quick connector, in which the outer insulating body 21 of the socket is nested and assembled with the inner insulating body 22 of the socket and fixed through four threaded holes on the outside, and the inner core 23 of the socket is sleeved in the inner insulating body 22 of the socket, and the outer insulating body 21 of the socket is used to support the inner core 23 of the socket to achieve the purpose of limiting and clamping.

[0035] This embodiment provides a high-voltage and high-current quick connector. The xenon lamp cable 24 is wrapped with a high-voltage heat shrink tube on the outside to further strengthen the insulation. The end is crimped with a square wire nose and fixed to the inner core 23 of the socket through the xenon lamp cable fastening screw 25. The xenon lamp cable 24 is inserted into the internal insulating body 22 of the socket, maintained coaxially, and then passed out of the external insulating body 21 of the socket.

[0036] The present invention provides a high-voltage and high-current quick connector. The end of the external insulating body 11 of the plug has four mounting holes, which can be installed and fixed with the external flange of the fixed bracket. The end of the external insulating body 21 of the socket has four mounting holes, which can be installed and fixed with the external flange of the light box bracket. When the connector is in use, the vertical up and down movement of the light box bracket drives the movement of the socket to perform the plug-in and unplug process.

[0037] Install the watch strap contact finger in the dovetail groove of the socket core 23. Note that the directions of the two relative watch strap contact finger fins should be consistent, so that the plugging and unplugging process is easier.

[0038] Double-conductor copper foil tape can be wrapped around the outer walls of the plug's external insulating body 11 and the socket's external insulating body 21 . Note that when wrapping, the layers should be connected to each other to ensure that there are no gaps.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principles of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A high-voltage, high-current quick connector, consisting of a plug and a socket for plugging and unplugging, the plug being used to connect to an energy cable, and the socket being used to connect to a xenon lamp cable; characterized in that: The plug and socket shells are made of polytetrafluoroethylene; the plug and socket shells adopt a nested concentric ring structure, and the plug and socket electrical connection core is made of brass with a tinned surface. The plug and socket electrical connection uses a watchband spring at the plug and socket plug position, and the plug and socket have an adjustment margin during the plug and pull process to compensate for position differences in the form of plug and pull depths. The plug includes an outer insulating body, an inner insulating body, an inner core, and an energy cable bolt fastener; the outer insulating body is assembled with the inner insulating body and fixed by four threaded holes on the outer side; the inner core is sleeved inside the inner insulating body, and the outer insulating body is used to press against the inner core for limiting and clamping; the socket includes an outer insulating body, an inner insulating body, an inner core, and a xenon lamp cable bolt fastener; the outer insulating body is assembled with the inner insulating body and fixed by four threaded holes on the outer side; the inner core is sleeved inside the inner insulating body, and the outer insulating body is used to press against the inner core for limiting and clamping; The energy cable bolt fastener is used to fix the square wire nose crimped on the end of the energy cable. The energy cable passes through the internal insulating body of the plug, maintains coaxiality, and then passes through the external insulating body of the plug; the xenon lamp cable bolt fastener is used to fix the square wire nose crimped on the end of the xenon lamp cable. The xenon lamp cable passes through the internal insulating body of the socket, maintains coaxiality, and then passes through the external insulating body of the socket.

2. A high-voltage, high-current quick connector according to claim 1, characterized in that: The outer wall of the external insulating body of the plug and the socket is wrapped with double-conductor copper foil tape for encapsulation, which effectively blocks the propagation of electromagnetic interference.

3. The high-voltage, high-current quick connector according to claim 1, characterized in that: One end of the plug core is threadedly fastened to the end of the energy cable, and the other end is a plate structure. The end of the plate structure has an external chamfer structure for plugging into the socket core; one end of the socket core is threadedly fastened to the end of the xenon lamp cable, and the other end is a block structure with a dovetail groove. The end of the block structure has an internal chamfer structure for plugging into the plug core.

4. The high-voltage, high-current quick connector according to claim 3, characterized in that: The watchband contact fingers are arranged in the dovetail groove of the socket inner core, and the opposite sides of the plug inner core are smaller than the inner hole of the socket inner core by 0.5 mm.

5. The high-voltage, high-current quick connector according to claim 4, characterized in that: During the plugging and unplugging process of the plug and socket, the plane freedom is compensated by the margin of the gap between the internal insulating body of the plug and the internal insulating body of the socket, and the margin of the width between the inner core of the plug and the inner core of the socket. The plugging and unplugging direction freedom is compensated by the gap left after the plug and the socket are inserted.

6. The high-voltage, high-current quick connector according to claim 5, characterized in that: The high-voltage and high-current quick connector is used to electrically connect to the large-diameter pulse xenon lamp in the sheet laser amplifier module light box; the end of the external insulating body of the plug has four mounting holes for mounting and fixing with the external flange of the fixing bracket; the end of the external insulating body of the socket has four mounting holes for mounting and fixing with the external flange of the light box bracket; the vertical up and down movement of the light box bracket drives the up and down movement of the socket, and the plug is plugged in and out.

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