CN111244836A - Cable quick connect terminal - Google Patents

Abstract

The cable quick connection terminal disclosed by the invention is integrally supported by the bracket, so that the ground clearance is ensured to meet the requirement of ground safety distance; a plurality of supporting insulators are arranged on the bracket; the supporting insulator is fixedly provided with a busbar which is made of an electric conductor material, and two ends of the busbar are provided with wiring parts for electrically connecting the end parts of cables to be connected; for the guarantee equipment insulating nature, support insulator is the column insulator of electrified instruction function, electrified monitoring display with support insulator electricity is connected, the instruction shows support insulator's electrified volume can satisfy equipment safety requirement, can provide electrified display function again for the device. The invention is flexible, light and high in reliability, can realize the connection and conduction of a plurality of sections of cables at the same time, and has flexible and efficient application space.

Description

Cable quick connect terminal

Technical Field

The invention belongs to the technical field of power line protection, and relates to a cable quick connection terminal.

Background

In an urban power distribution network, a cable mainly plays a role in realizing transmission of electric power information and electric energy distribution, and generally consists of a wire core, a shielding layer, an insulating layer and a protective layer. With the development of urban construction, cable faults frequently occur in distribution line faults, and the occupied proportion of the cable faults is continuously increased. The urban power grid cable fault often causes power grid outage, seriously harms power supply reliability, and becomes a main factor influencing the operation safety of the power grid.

Due to environmental restrictions, a common method for cable fault emergency repair is to reconnect a cable intermediate joint, but the time for manufacturing a cable head often exceeds 3 hours, the power transmission time exceeds 8 hours, and normal power supply is seriously affected. Moreover, the technical requirements for manufacturing the cable intermediate joint are very strict, and the factors such as the humidity of the cable head, the phase insulation, the absolute cleanness of a cable phase line and the like have strict technical standards, so that irrecoverable loss can be caused if a problem occurs. Secondary faults in the intermediate connectors are also a common cause of distribution line faults in recent years.

Accordingly, it would be an urgent technical problem for those skilled in the art to provide a cable quick connect terminal that facilitates the connection of two lengths of cable.

Disclosure of Invention

Aiming at the current research situation and the existing problems, the invention provides the cable quick connection terminal, which can quickly realize the safe and stable connection operation of the cable, has high equipment safety and flexibility, and can simultaneously realize the connection and conduction of a plurality of sections of cables.

The specific scheme for achieving the purpose is as follows:

a cable quick connection terminal comprises a bracket, a supporting insulator, a busbar and a live monitoring display; the support is provided with a plurality of support insulators, and the support insulators are fixedly provided with the bus bars; the bus bar is made of an electric conductor material, and the two ends of the bus bar are wiring parts for electrically connecting the end parts of cables to be connected; the live-line monitoring display is electrically connected with the supporting insulator and indicates and displays the live quantity of the supporting insulator for live-line detection after the monitoring terminal is connected with a cable, the live condition of the cable is displayed after the cable is connected, and safety management and control are well performed. And the distance of each phase conductor of the cable and the connection of the busbar meet the safety requirements of the transformer substation equipment.

Preferably, the supporting insulators are arranged on the support through double-column insulators, namely every two supporting insulators are oppositely arranged on the support, one busbar is fixedly arranged on each pair of supporting insulators which are oppositely arranged, and a fixed distance is reserved between every two column insulators.

Preferably, the busbar is provided with a connecting hole, and the supporting insulator penetrates through the connecting hole through a connecting bolt to be fixedly connected with the busbar.

Preferably, the cable connector further comprises a connecting sheet, wherein the connecting sheet is positioned on the connecting part and used for pressing the end part of the cable to be connected on the connecting part; the connecting piece with the corresponding position on the connecting portion is equipped with a plurality of montage line holes, and every group wiring hole sets up relatively, and connecting bolt passes wiring hole and nut threaded connection for adjust the connecting piece, wait to connect the degree of compressing tightly between cable and the wiring portion.

Preferably, the busbar is an aluminum busbar.

Preferably, the power distribution bus bar further comprises a copper-aluminum transition gasket, and the copper-aluminum transition gasket is clamped between the cable to be connected and the bus bar.

Preferably, the bracket is provided with a grounding wire.

Preferably, a wiring channel is arranged in the support, and the live-line monitoring display and the connecting line of the supporting insulator are wired through the wiring channel.

Preferably, still include, the protection casing sets up on the support, cover female arranging with support insulator's top can adopt transparent protection casing, cuts off the protection to female arranging, simultaneously, accomplishes the separation of connection terminal and rainwater, foreign matter, plays dampproofing, rain-proof snow's effect.

Preferably, the cable to be connected in the invention comprises a 10kV cable.

Compared with the prior art, the invention has the following beneficial effects:

1. equipment efficiency: the equipment can greatly shorten the connection and installation time of the cable intermediate joint, can quickly realize the safe and stable conduction of the cable, and compresses the power transmission time of the cable by 87.5 percent. The power supply can be quickly recovered, the normal power consumption of residents and enterprises is guaranteed, and the power supply service capacity is improved;

2. the equipment adaptability is strong: the power failure time of the cable and the power distribution network is shortened, and the power supply of the cable equipment can be quickly recovered in severe weather, narrow space and night time. The requirements on factors such as site temperature, construction space, air humidity, weather conditions and the like are not high, and the emergency repair device can adapt to various emergency repair conditions;

3. the equipment has high flexibility: the equipment can realize the connection of copper and aluminum cables and the quick connection of cables of different types, and meets the requirements on engineering construction, daily maintenance and the like. Often in the engineering construction because cable length can not satisfy the requirement, the cable model is different and can't change and connect, can only lay the cable again, and consuming time and wasting power just causes the cable waste. The equipment can realize the connection and conduction of a plurality of sections of cables at the same time, and the application space is flexible and efficient;

4. the installation and maintenance cost is low: the equipment can be repeatedly used, does not have a quick-wear part, saves the insulating encapsulation of the power connector intermediate equipment, is connected through the three-phase copper bar equipment, reasonably arranges the safe distance of the equipment, and avoids the influence of environmental factors such as temperature, moderate degree and the like on the connection of the power cable. While the rush repair time is shortened, the rush repair cost is greatly reduced, the cable material consumption is saved, and the power supply economic benefit is greatly improved;

5. convenience: the creativity of the equipment lies in that the equipment is connected with the cable quickly, meanwhile, the cable terminal and the terminal connection are prevented from being protected layer by layer, the insulation protection between three-phase conductors of the cable terminal is reduced, and the problem of insufficient safety distance between the three-phase conductors is solved. The bracket can be made of light high-strength aluminum alloy materials, the total weight is not more than 30kg, and the total volume is less than 0.25m 3;

6. the stability is high: the invention is tested by multiple high-frequency withstand voltage tests and alternating current/direct current withstand voltage tests, and has high circulation and high equipment operation stability. Through the switching busbar, the cable terminal and the terminal connection are prevented from being protected layer by layer, and the cable conductor and the conductor are quickly connected. Meanwhile, the three phases of the cable are isolated by the equipment through the fixing support, the interphase distance meets the requirement of 125mm, and the insulation protection among three-phase conductors of the cable terminal is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from the provided drawings without inventive effort.

FIG. 1 is a schematic perspective view of a cable quick connect terminal of the present invention;

FIG. 2 is a top plan view of the cable quick connect terminal of the present invention;

FIG. 3 is a wiring schematic of the cable quick connect terminal of the present invention;

fig. 4 is a sectional view showing the internal structure of the support insulator of the present invention;

FIG. 5 is a schematic circuit diagram of the monitor display according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

At present, the cable emergency repair is mainly divided into four stages: (1) constructors dig out damaged cables and measure the reserved length of the cables. (2) And checking the damaged degree of the cable, checking whether the reserved length of the cable meets the requirement, and cleaning a fault site. (3) The construction personnel process the fault cable section, start the fault cable, clear the two ports layer by layer, and process the steel armor, the semiconductor layer, the shielding layer, the inner and outer protective sleeves and the like. (4) The arrangement personnel install terminal sheath, shielding layer, external insulation, protective sheath etc. additional in the conductive layer outside with cable conductor layer clearance back. The technical requirements for manufacturing the cable intermediate joint are very strict, and the factors such as the humidity of a cable head, the phase insulation, the absolute cleanness of a cable phase line and the like have strict technical standards, so that irrecoverable loss can be caused if a problem occurs. Secondary faults in the intermediate connectors are also a common cause of distribution line faults in recent years.

The cable that awaits receiving in this embodiment is suitable for including the cable of 10kV, and the purpose of this embodiment lies in compressing cable intermediate head preparation time, saves the time that cable semiconductor layer peeled off, the cable outside installs protective insulation layer additional, can compress cable trouble rush-repair time to within 1 hour.

Referring to the attached drawings 1-3 of the specification, the cable quick connection terminal provided by the embodiment is supported by the bracket 1 as a whole, so that the ground clearance is ensured to meet the requirement of ground safety distance; a plurality of supporting insulators 2 are arranged on the support 1, and the distance between the supporting insulators 2 and the ground reaches 60 cm; the supporting insulator 2 is fixedly provided with a busbar 3, the busbar 3 is made of an electric conductor material, and two ends of the busbar 3 are wiring parts for electrically connecting the end parts of cables 13 to be connected; for the insulating nature of guarantee equipment, support insulator 2 is the column insulator of electrified instruction function, electrified monitoring display 9 with support insulator 2 electricity is connected, instructs the demonstration the electrified volume of support insulator 2 can satisfy equipment safety requirement, can provide electrified display function for the device again.

In a specific embodiment, the supporting insulators 2 are double-column insulators, and are disposed on the bracket 1, that is, every two supporting insulators 2 are disposed on the bracket 1 oppositely, each pair of oppositely disposed supporting insulators 2 is fixedly mounted with a bus bar 3, and each group of double-column insulators is spaced by a fixed distance.

The bus bar 3 is provided with a connecting hole 5, and the supporting insulator 2 penetrates through the connecting hole 5 through a connecting bolt to be fixedly connected with the bus bar 3. The top end of the supporting insulator 2 is provided with a threaded hole, the connecting bolt sequentially penetrates through the connecting hole 5 and the threaded hole, the external thread of the connecting bolt is matched with the internal thread of the threaded hole, and fixation of the busbar 3 and the supporting insulator 2 is achieved.

The bottom of the supporting insulator 2 is provided with a threaded hole, a mounting hole is formed in the position, corresponding to the supporting insulator 2, of the support 1, and the bolt sequentially penetrates through the mounting hole and the threaded hole in the bottom of the supporting insulator 2 to fix the supporting insulator 2 on the support.

In this embodiment, the support insulator 2 may be an insulator of the CGO-10Q type, a high-voltage live sensor is installed inside the insulator, the high-voltage live sensor is electrically connected to a connecting bolt fixed to the busbar 3, a wiring bolt 14 is installed at the bottom of the outer side of the support insulator 2, the wiring bolt 14 is electrically connected to the high-voltage live sensor, and a lead of a live monitoring display is connected to the wiring bolt 14 of each support insulator 2, so that the live amount of the device is monitored.

In a particular embodiment, the connecting piece 7 is located on the connection portion for pressing the end to be connected with the cable 13 against the connection portion; the connecting piece 7 and the connecting portion 4 are provided with a plurality of assembling connection holes 6 at corresponding positions, each group of wiring holes 6 are arranged oppositely, and the connecting bolt penetrates through the wiring holes 6 to be in threaded connection with the nut, so that the compression degree between the connecting piece 7, the cable to be connected 13 and the wiring portion can be adjusted. The wiring hole 6 is obtained by drilling the busbar 3 according to the wiring mode requirement of the transformer substation, the aluminum busbar and the post insulator are fixed through the bolt, and the supporting insulator 2 is used for firmly fixing the busbar 3 to prepare for connecting a cable. Two sides of the busbar 3 are respectively provided with 4 phi 16 screw holes and 72 connecting sheets for quickly connecting cables. In this embodiment, the transformer substation 10kV busbar wiring requirement is as follows: the air insulation clear distance between the different-phase bus bars or the bus bars and the cabinet body meets more than 12.5cm, and the withstand voltage degree required by the insulator reaches 30kV and above.

The busbar 3 is an aluminum busbar, and the rest parts of the aluminum busbar except the wiring part are covered with insulating layers. At this time, a copper-aluminum transition gasket 8 is clamped between the cable 13 to be connected and the wiring part of the aluminum bar, so that a copper cable or an aluminum cable can be conveniently connected. The aluminum rows can be arranged in three to form a three-phase aluminum row. In order to realize the quick connection of cables of various types, the copper-aluminum transition gasket 8 arranged at the terminal ensures the safe and stable operation of the cable connection process. One side of the copper-aluminum transition gasket is copper, and the other side of the copper-aluminum transition gasket is aluminum, so that connection of different materials can be facilitated after compression joint. The thin plate is required to be as thin as possible, the compression joint is firm, and the condition that the contact surface is overheated is reduced.

In a specific embodiment, the bracket 1 is additionally provided with a grounding wire 11, so that the cable body and the equipment body can be conveniently provided with grounding protection. The grounding wire is connected with the grounding soft copper wire of the high-voltage cable to be connected on two sides, the bracket shell, the supporting insulator and the electricity testing grounding device.

In a specific embodiment, a wiring channel 10 is arranged inside the bracket 1, and the live monitoring display 9 is connected with the live sensing function supporting insulator 2 to provide a live display function, see fig. 5, which is a schematic circuit diagram of the live monitoring display, wherein A, B, C are all high-voltage live sensors inside the supporting insulator 2, and are respectively electrically connected with the indicator light. The bottom of the support insulator 2 has sensing leads and the bracket 1 has through holes at the opposite positions of the sensing leads, which are communicated with a wiring channel 10 for leading the leads to the live monitoring display 9 and connecting them. The electrification monitoring display 9 has a lead-out through-hole near a mounting position on the stand 1.

In a concrete embodiment, the transparent protection casing 12 of installation above the equipment support 1 covers female arranging 3 with the top of support insulator 2 sets up the cable on the protection casing and passes the hole, if the cable is thin certain insulating tape, waterproof tape of parcel in the cable outside, the gap of shutoff protection casing and cable sheath ensures dampproofing and waterproofing in the protection casing, arranges 3 to the three-phase and cuts off respectively, simultaneously, accomplishes electrified equipment and rainwater, the separation of foreign matter, plays dampproofing, rain-proof snow's effect.

The invention is flexible, light and high in reliability, can be widely applied to a regional power supply station system, and is a reliable and stable tool in the aspects of fault emergency repair and engineering construction. In the engineering construction process, the power cable is laid again frequently due to different cable models or insufficient cable length, so that resource waste is often caused, and the engineering construction progress and cost are seriously influenced.

The above detailed description is provided for a cable quick connection terminal provided by the present invention, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (9)

1. A cable quick connection terminal is characterized by comprising a bracket, a supporting insulator, a busbar and a live monitoring display; the support is provided with a plurality of support insulators, and the support insulators are fixedly provided with the bus bars; the bus bar is made of an electric conductor material, and the two ends of the bus bar are wiring parts for electrically connecting the end parts of cables to be connected; and the live monitoring display is electrically connected with the supporting insulator and indicates and displays the live quantity of the supporting insulator.

2. The cable quick connection terminal according to claim 1, wherein the supporting insulators are arranged on the bracket by using double-column insulators, that is, every two supporting insulators are oppositely arranged on the bracket, each pair of oppositely arranged supporting insulators is fixedly provided with one busbar, and each group of double-column insulators are spaced by a fixed distance.

3. The cable quick connection terminal according to claim 1, wherein the busbar is provided with a connecting hole, and the support insulator penetrates through the connecting hole through a connecting bolt to be fixedly connected with the busbar.

4. The cable quick connect terminal of claim 1, further comprising a connecting tab on said wire connecting portion for pressing an end of said cable to be spliced against said wire connecting portion; the connecting piece with the corresponding position on the connecting portion is equipped with a plurality of montage line holes, and every group wiring hole sets up relatively, and connecting bolt passes wiring hole and nut threaded connection for adjust the connecting piece, wait to connect the degree of compressing tightly between cable and the wiring portion.

5. The cable quick connect terminal of claim 1, wherein said busbar is aluminum.

6. The cable quick connect terminal of claim 5, further comprising a copper-aluminum transition pad, said copper-aluminum transition pad being sandwiched between said cable to be connected and said busbar.

7. The cable quick connect terminal of claim 1, wherein said bracket has a ground wire disposed thereon.

8. The cable quick connection terminal according to claim 1, wherein a wiring channel is formed inside the bracket, and a connection line between the live monitor display and the support insulator is routed through the wiring channel.

9. The cable quick connect terminal of claim 1, further comprising a shield disposed on said cradle covering a top portion of said bus bar and said support insulator.

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