CN104979792B - A kind of low-voltage cable junction box - Google Patents

A kind of low-voltage cable junction box Download PDF

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Publication number
CN104979792B
CN104979792B CN201410148288.7A CN201410148288A CN104979792B CN 104979792 B CN104979792 B CN 104979792B CN 201410148288 A CN201410148288 A CN 201410148288A CN 104979792 B CN104979792 B CN 104979792B
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wire
low
phase
junction box
voltage cable
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CN104979792A (en
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袁茂银
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HUNAN GUOAO POWER EQUIPMENT Co Ltd
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HUNAN GUOAO POWER EQUIPMENT Co Ltd
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Priority to CN201510885859.XA priority Critical patent/CN105811348A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/18—Distribution boxes; Connection or junction boxes providing line outlets

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Cable Accessories (AREA)

Abstract

The invention discloses a kind of low-voltage cable junction boxes, it includes at least one wire inlet unit, multiple outgoing line units and a connection unit, wire inlet unit includes three-phase firewire inlet wire element, zero curve inlet wire element, ground wire inlet wire element and leading-in bracket, wherein each inlet wire element is divided into integral on leading-in bracket, outgoing line unit includes that three-phase firewire goes out thread elements, zero curve goes out thread elements, ground wire goes out thread elements and wire-outlet rack, wherein respectively go out thread elements be divided into it is integral on wire-outlet rack；Each element in wire inlet unit and outgoing line unit is separately electrically connected with connection unit.Compared with prior art, the low-voltage cable junction box is designed using Three-phase five-wire, three-phase and four-line or Three-phase five-wire can be connect, three-phase firewire, zero curve and ground wire modularized design, while the setting of zero curve connector is arranged in three-phase firewire staged and is generated in space, and space is made full use of, reduce occupied area, Three-phase five-wire standardized designs are suitble to large-scale production, therefore its application prospect is very wide.

Description

A kind of low-voltage cable junction box
Technical field
The present invention relates to a kind of low-voltage distribution system devices, specifically, are related to a kind of low-voltage cable junction box, belong to electricity Cable branch technique field.
Background technique
Low-voltage distribution system refers to that voltage is less than the distribution system of 1kV, by distribution substation (usually by the transmission of electricity of power grid Voltage is reduced to distribution voltage), high-tension distributing line, distribution transformer, low-voltage distributing line and corresponding control protection equipment Composition.Wherein the distribution system of 0.4kV is widely used in the three-phase alternating currents such as Urban Residential District, industrial and mining enterprises, construction site Three-phase in the electric system of 380/220V, 55Hz, especially suitable for a variety of communal facilitys such as avenue, universities and colleges, residential block Or it is used in single-phase power transmission and distribution or single-phase lighting system as receiving or distribution electric energy.
In low-voltage network, transmission line of electricity generally uses three-phase four-wire system, and wherein three-phase refers to A, B, C three-phase, four lines In four routes respectively represent A, B, C three-phase firewire and zero curve N.The effect of zero curve N is: guaranteeing when threephase load asymmetry The current potential of zero curve is zero, to eliminate neutral point potential variation, the phase voltage of each phase load is made to be equal to power supply phase voltage, and and load Change unrelated；If there is a phase breaking in three-phase, this phase only will affect, remaining two-phase voltage still remains unchanged, and connects in this two-phase Electrical equipment remain to work normally.Therefore, the zero curve in three-phase four-wire system is once breaking for some reason, asymmetric in threephase load In the case of, neutrality locus transfer can be generated, causes imbalance of three-phase voltage, some phase voltages are excessively high, may cause electrical equipment It burns；Some mutually presses through low, and electrical equipment can not normal use.For higher safety, three-phase is also increasingly advocated now Five-wire system, three-phase five-wire mode more a ground wire PE, neutral conductor N and ground wire E multiple groundings, dual guarantor compared with three-phase four-wire system Shield.
What low-voltage distribution system higher pressure distribution system more needed to arouse attention is the electric leakage bring fire in low-voltage distribution After hidden danger, mainly electric wiring or apparatus insulated damage, under certain circumstances, to close substance (threading metal tube, electricity Device of air metal shell, live wood etc.) it can leak electricity, topical substance is charged, is caused to people serious or even fatal Electric shock, thus generate spark, electric arc, overheat high temperature etc. and cause fire.When it is run into carapace short that electric leakage, which occurs, for electrical equipment, Electric current will be so that device housings, zero line protection line (protective ground wire), zero curve (the earth) form closed circuit, usual leakage current Will be very big, fuse can be made to act and cut off the power to realize protection.But presence (such as fuse specification due to many Several times may artificially be increased or replaced by copper wire, earthing or grounding means is undesirable causes that ground resistance is larger, ground connection end Son is not connected firmly, protective device failure or setting are unreasonable etc.) overcurrent protective device can be made not have overcurrent protection；In this way Electric leakage by lasting presence, and then causes electric shock or electrical fire accident, many leakage fire cases to also demonstrate this once occurring A bit.
It causes the factor of electric leakage very much, is summed up the more right and wrong of installation mainly include the following types: (1) low-voltage distribution system Electric specialty personnel, quality is irregular, and quality is difficult to ensure, shows: humidity has in sour, caustic corrosion environment, electricity Line surface, equipment are not protected and are mounted directly；When wiring, knife, pincers, hammer equivalent damage insulating layer；Terminal quality of connection and Insulating bag rolls undesirable etc. the non-standard phenomena of quality；(2) electric wiring or equipment failure to inspect, because of overload or make With the reasons insulation degradation such as the time limit is longer；(3) personation, electric product of poor quality are selected；(4) extraneous factor: moisture is immersed, is squeezed Pressure, damaged by rats etc..The reason of electric leakage causes fire mainly has: (1) leakage current directly causes fire, leak current fault point usual situation Lower contact can be not firm, seemingly connect it is non-connect state, cause contact resistance larger, overcurrent protective device made to be difficult to act, at the same can therefore Electric arc is generated at barrier point.According to survey, only the arc temperature of the electric current of 0.5A can be more than 2000 DEG C or more, it is sufficient to ignite all flammable Object.(2) connection is not firm at the connecting terminal of protection zero line or protection ground wire, causes fire.Phase line is connect with zero curve connecting terminal It is not firm, equipment work it is abnormal, can discovery in time processing, and the connecting terminal of protection zero line or ground wire connect not firm, resistance Excessive, equipment works as usual, and fault point is then not easy to be found.Once electric leakage, due to fault point connector is too loose or corrosion etc., occur High resistant causes hot-spot, generates high temperature or electric arc at connection terminal, can ignite combustible around, or burn out electric appliance Socket, switch etc., ignite wooden pedestal, this is relatively conventional electric leakage form on fire.In July, 2000, Hangzhou restaurant matches Electroplax fire is 1, before catching fire, and restaurant has closed, and load is at a low ebb.When fire occurs, electric consumption on lighting is still normal.Through It looks into total air switch in distribution box seriously to carbonize, protection zero line binding post has metal concave to melt trace, is consistent with drain conditions.(3) Fire caused by electrical leakage voltage, after lasting generation of leaking electricity, since electric current cannot scatter, and it is logical to lead another circuit for looking for resistance small Ground can make the metal shell of all electric devices being attached thereto have voltage-to-ground along zero line protection line (ground line) conduction, At this moment it may become metal components arcings such as hot-water heating pipe from fire origin to neighbouring low potential, gas pipes, only the maintenance voltage of 20V Electric arc can be made to recur, can equally ignite combustible around.If it is to gas pipe arcing, it is possible to puncture tube wall, make Cause fire at gas leak.It should be noted that due to the conduction of voltage, leakage point of electricity is not necessarily consistent with point of origin.(4) it protects If protecting zero curve or protecting the line footpath selection of ground wire too small, when passing through biggish leakage current, route temperature rise is very fast, equally Fire hazard.
It is not difficult to find out from upper, the various kinds of equipment of low-voltage distribution system is set for security requirement and not less than high voltage power distribution Standby, What is more, and low-voltage distribution apparatus requires higher safety and ease-to-operate instead.
It is low-voltage cable junction box as an essential controller switching equipment in low-voltage distribution system.Cable branch box is A kind of controller switching equipment developed when the little individual load distribution of capacity is relatively concentrated, with power distribution network cable process Development.The low-voltage cable junction box of most getting up early is to be matched using cabinet into and out of line copper bar and connect cable thereon to use, and carries out cable The connection of multiple-limb, but such feeder pillar cannot directly operate every road, only use as cable branch；When branch specific electric load When circuit breaks down, then need to close upper level circuit switch, so that all branch line circuits are both needed to have a power failure in entire feeder pillar, Power-off time is long, is unfavorable for the requirement now to power system restoration；In addition, the live part of such feeder pillar is exposure, to inspection Safety also brings certain hidden danger when repairing.
For the various problems of above-mentioned original branch case, in the prior art to feeder pillar, especially low-voltage cable junction box A variety of improvement are carried out.
A kind of cable branch box disclosed in Chinese patent application CN 201310425891 carries out feeder pillar body structure Structure improvement, using cover board and the unitary block of aluminum board group in trimming at feeder pillar combine, replace previous cuboid feeder pillar, The material that trimming is saved is saved, reduces commissure and welding, but the arrangement problem of circuit structure cannot solve in the cable branch box Certainly；A kind of cable branch box disclosed in Chinese patent application CN201210321923 comprising cable vault, bus-bar room, explosion-proof anti- Cabinet, rain cover, potential indicator, fault detector and microcomputer controller are stolen, structure is simple, and high safety and reliability is convenient for The problem of quick to search failure, but above-mentioned setting not can solve circuit structure itself；Chinese patent application CN A kind of all-sealed low-voltage cable junction box disclosed in 201310451536, box sealing, busbar outside use insulation material Material is made, and busbar skeleton is equipped with the socket with cable connection, is protected using double containment, prevents route from meeting water short circuit, but should Insulating materials is used around busbar in kind low-voltage cable junction box, influences electric conductivity, and repair inconvenience；Chinese patent Low-voltage cable junction box disclosed in CN201320069330 comprising bottom plate, bottom plate are equipped with three-phase bus bar, close the exhausted of busbar Edge cover, each insulating boot is equipped with spliced eye and does not need more installation tool when installing output module, simple and convenient, but should The safety problem of zero curve not can solve in low-voltage cable junction box；Low-voltage cable disclosed in Chinese patent CN 201220586472 Feeder pillar outlet arrangement architecture, triple line and the whole presentation level course column structures of zero curve outlet confluence, are not in that cable is handed over Overlapping phenomenon is pitched, but the triple line is connect by bolt with feeder pillar with zero curve, connection type is complicated, is not easy to Fast Installation And maintenance；A kind of low-voltage cable junction box disclosed in Chinese patent CN200920180719 utility model, the low-voltage cable branch All inlet-outlet line is protected using band fuse type killer switch on the three-phase inlet-outlet line of case, power cable and case are become, low pressure Switchgear etc. connects, and provides very big convenience for cable system, but once one in this kind of low-voltage cable junction box A outgoing line unit breaks down, and will lead to entire wire inlet unit failure, in this way thus outgoing line unit all will power-off, power-off area Extensively, maintenance difficult increases.
In a variety of improvement to sum up carried out to low-voltage cable junction box, present low-voltage cable junction box product is not related to electricity The improvement of circuit in the feeder pillar of cable, and do not solve the key problem of such product: one in present low-voltage cable junction box product As be all three-phase four-wire system, be arranged without ground wire, and triple line is not combined with zero curve, but use is provided separately, Triple line is arranged in the bus-bar system in low-voltage cable junction box, and neutral conductor N (zero curve) is arranged by cabinet, entire low tension Cable feeder pillar needs bus-bar system cooperation cabinet to use, and zero curve is exposed outside, when imbalance of three-phase voltage or neutral point potential Variation, zero curve are possible to charge, and especially zero curve is still in such a way that copper bar adds manual wiring, and people once accidentally touches Exposed zero curve can generate Danger Electric shock risk on cabinet.Also, in the separating brake or making process of present low-voltage cable junction box, It can not be all ensured of by this body structure of equipment according to first leading to ground wire, zero curve then three-phase firewire；Conversely, being first disconnected three when open circuit Phase firewire, zero curve then ground wire are needed by professional knowledge judgement electrification situation, cannot be to the maximum protection of people and equipment；Furthermore Each non-respective independence of outlet unit influences the normal work of other outlet units, makes to break when an outlet unit breaks down Electric area increases, and increases the difficulty of maintenance overhaul.Therefore, a kind of high safety performance and the easy low-voltage cable branch of maintenance are needed Case.
Summary of the invention
In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a kind of low-voltage cable junction boxes, this is low Voltage cable feeder pillar uses three-phase five-wire mode, and three-phase firewire, zero curve and ground wire installation are integral, which can make point Branch case interior circuit construction part is produced as standard component, and matching existing various cabinets or simple refit can be used, and can greatly be changed Kind existing product specification and the different trouble waters of installation requirement, so that such equipment applicability is more preferably.
For achieving the above object, The technical solution adopted by the invention is as follows:
A kind of low-voltage cable junction box, comprising: at least one wire inlet unit, multiple outgoing line units and a connection unit, into Line unit includes three-phase firewire inlet wire element, zero curve inlet wire element, ground wire inlet wire element and leading-in bracket, wherein each inlet wire element point It is integral on leading-in bracket, outgoing line unit include that three-phase firewire goes out thread elements, zero curve goes out thread elements, ground wire goes out thread elements and Wire-outlet rack, wherein respectively go out thread elements be divided into it is integral on wire-outlet rack；Each element difference in wire inlet unit and outgoing line unit Independently it is electrically connected with connection unit.
Preferably, wire inlet unit is connected with outgoing line unit through connection unit integral.
Preferably, wire inlet unit is arranged in parallel with outgoing line unit；Wire inlet unit, outgoing line unit are vertical with connection unit to be set It sets；At this point, wire inlet unit, outgoing line unit and connection unit are at a reticular structure, wire inlet unit and outgoing line unit are in connection unit Upper integration-in-one structure.
As a kind of preferable embodiment, outgoing line unit can increase according to actual needs, preferably 3~5 groups of outlet lists Member, the low-voltage cable junction box is one into three out at this time or up to one into five goes out.
As a kind of preferable embodiment, wire inlet unit can increase according to actual needs, preferably 2 groups of wire inlet units, Pass through the wire inlet unit of each low-voltage cable junction box increased a wire inlet unit and another low-voltage cable junction box at this time Series connection inlet wire, to can realize that multiple low-voltage cable junction boxes can share one and enter line cable, so that winding displacement is more succinct.
Preferably, three-phase firewire inlet wire element, zero curve inlet wire element and ground wire inlet wire element is successively stepped is distributed in On leading-in bracket.
Preferably, zero curve goes out thread elements and ground wire goes out the same end that thread elements is arranged at wire-outlet rack, preferably sets side by side It sets in the same end of wire-outlet rack.
Preferably, connection unit includes three-phase connecting element, zero curve connecting element, ground wire connecting element and mounting plate, and three It is connected element, zero curve connecting element and the installation of ground wire connecting element on a mounting board.
It is highly preferred that three-phase connecting element, zero curve connecting element and ground wire connecting element are successively installed in parallel in mounting plate On, wherein three-phase firewire inlet wire element and thread elements passes through the series connection of three-phase connecting element, zero curve inlet wire element and thread elements out out Thread elements is connected by ground wire connecting element by the series connection of zero curve connecting element and ground wire inlet wire element and out.
It is highly preferred that above-mentioned each inlet wire element, go out to be flexibly connected between thread elements and connecting element, as it is a kind of preferably Embodiment is electrically connected between three-phase firewire inlet wire element and three-phase connecting element by pluggable mode, zero curve inlet wire element with and Zero curve connecting element is electrically connected by pluggable mode, and ground wire inlet wire element is electrically connected with ground wire connecting element by overlapping mode； Three-phase firewire goes out between thread elements and three-phase connecting element to be electrically connected by pluggable mode, zero curve go out thread elements with and zero curve connect member Part is electrically connected by pluggable mode, and ground wire goes out thread elements and is electrically connected with ground wire connecting element by overlapping mode.
Another object of the present invention is to provide a kind of low-voltage cable junction box, wire inlet unit in the low-voltage cable junction box, Outgoing line unit and connection unit are structurally reasonable, utilize the device space to greatest extent, reduce the occupied area of whole equipment, the low pressure Connection unit is set to the lower section of outgoing line unit and wire inlet unit on the basis of any above structure by cable branch box.
It is highly preferred that outgoing line unit and wire inlet unit riding upon on connection unit in column.As a kind of preferable reality Mode is applied, multiple outgoing line units set up separately ipsilateral with wire inlet unit.
It is highly preferred that three-phase connecting element is in the lower section of three-phase firewire inlet wire element.
Preferably, zero curve connecting element is not generally aligned in the same plane with three-phase connecting element.
Another object of the present invention is to provide a kind of low-voltage cable junction box, in order to cooperate in wire inlet unit and outgoing line unit The installation site of each element reduces equipment volume, the low-voltage cable junction box is further any further using space in case It is stairstepping by the mounting plate cross section of connection unit on the basis of above structure.
It is highly preferred that mounting plate is integrally formed, using bending forming；Mounting plate is adopted as a preferred implementation manner, With being spliced.
Preferably, the one end of three-phase connecting element setting on a mounting board, it is each to be connected element setting on a mounting board Height it is consistent.
It is highly preferred that zero curve connecting element and ground wire connecting element are arranged on the other end of mounting plate.
Preferably, in order to rationally utilize three-phase firewire go out thread elements, zero curve go out thread elements staged distribution generate space, Occupied area is reduced, zero curve connecting element is in the lower section that three-phase firewire goes out thread elements, ground wire connecting element and mounting plate end Connection.
It is highly preferred that the side end on mounting plate is bent to form a non-horizontal surface, ground wire connecting element and the mounting plate The non-horizontal surface connection that end is bent to form.
It is highly preferred that the cross section of ground wire connecting element is L-shaped, the one side of ground wire connecting element and the mounting plate end The non-horizontal surface connection being bent to form.
It is highly preferred that the mounting plate end is bent to form a vertical plane, the one side of ground wire connecting element and the mounting plate The vertical plane connection that end is bent to form.
It is highly preferred that ground wire connecting element and the connection type of the mounting plate end are to be spirally connected.
It is highly preferred that three-phase connecting element, zero curve connecting element, ground wire connecting element are copper bar.
Another object of the present invention is to provide a kind of low-voltage cable junction box, and the low-voltage cable junction box is in separating brake or conjunction During lock, guaranteed by this body structure of equipment according to first leading to ground wire, zero curve then three-phase firewire；Conversely, being first disconnected when open circuit Three-phase firewire, zero curve then ground wire, the maximum protection to people and equipment are realized with this at a possibility that reducing electric leakage to the greatest extent.
A possibility that in order to reduce touch, for the low-voltage cable junction box on the basis of any of the above-described structure, inventor will Leading-in bracket is designed as including inlet wire lid and inlet wire pedestal, and inlet wire lid and inlet wire base engagement, inlet wire lid are integral setting, three-phase Firewire inlet wire element, zero curve inlet wire element and ground wire inlet wire element are successively stepped to be distributed on inlet wire pedestal through inlet wire lid Closure.
It is highly preferred that the end that inlet wire lid and inlet wire pedestal are flexibly connected is positioned close to the one of three-phase firewire inlet wire element End, inlet wire lid is flexibly connected with inlet wire pedestal by pin hole, in this way in installation or maintenance process, when inlet wire lid is gradually opened When, ground wire inlet wire element, zero curve inlet wire element and three-phase firewire inlet wire element successively show.
It is highly preferred that further comprising an inlet wire lid locking bolt and an inlet wire pedestal locking bolt, inlet wire cover lock on leading-in bracket Determine bolt and inlet wire pedestal locking bolt is separately positioned on the one end of close ground wire inlet wire element in inlet wire lid and inlet wire pedestal, prevents Any inlet wire lid opened on leading-in bracket.
It is highly preferred that further comprising a leading-in bracket guide pile on leading-in bracket, leading-in bracket guide pile is arranged in inlet wire pedestal Close three-phase inlet wire element one end, when inlet wire lid open when, leading-in bracket guide pile to inlet wire lid position, prevent inlet wire lid Rotation, influences wiring or maintenance process.
It is highly preferred that the inlet wire lid and inlet wire pedestal of leading-in bracket are adopted and be made from an insulative material, it thus is avoided that leading-in bracket charges Danger.
Preferably, three-phase firewire inlet wire element is divided into the first phase firewire inlet wire element, the second phase firewire inlet wire element and Three-phase firewire inlet wire element, each phase firewire inlet wire element further comprise each phase firewire lead-in line joint and each phase firewire into Wire connections, each phase firewire lead-in line joint are connected with corresponding each phase firewire inlet wire connector.
It is highly preferred that zero curve inlet wire element further comprises zero curve lead-in line joint and zero curve inlet wire connector, zero curve inlet wire Connector is connected with zero curve inlet wire connector.
It is highly preferred that ground wire inlet wire element further comprises ground wire lead-in line joint and ground wire inlet wire connector, ground wire inlet wire Connector is connected with ground wire inlet wire connector.
It is highly preferred that the first phase firewire lead-in line joint, the second phase firewire lead-in line joint, third phase firewire lead-in line joint, zero Line lead-in line joint and ground wire lead-in line joint is successively stepped is distributed on inlet wire pedestal, it is each in three-phase firewire inlet wire element It is electrically connected between phase firewire inlet wire connector and three-phase connecting element by pluggable mode, zero curve inlet wire connector connect member with zero curve Part is electrically connected by pluggable mode, and ground wire inlet wire connector is electrically connected with ground wire connecting element by overlapping mode.
It is highly preferred that the first phase firewire lead-in line joint, the second phase firewire lead-in line joint, third phase firewire lead-in line joint, zero Line lead-in line joint and ground wire lead-in line joint the position of inlet wire pedestal successively from high to low.
Preferably, for the purposes of reducing a possibility that touching, wire-outlet rack is designed as including an outlet lid and one by inventor Outlet pedestal, outlet lid and outlet base engagement, outlet lid are integral setting, and three-phase firewire goes out thread elements, zero curve goes out line element Part and ground wire go out thread elements and are arranged on outlet pedestal, and zero curve goes out thread elements and ground wire goes out thread elements and is disposed side by side on outlet pedestal Same end.
It is highly preferred that outlet lid is positioned close to the one end that ground wire goes out thread elements with the end that is flexibly connected of outlet pedestal, Outlet lid is flexibly connected with outlet pedestal by pin hole, in this way in installation or maintenance process, when outlet lid is gradually opened, and three Phase firewire goes out thread elements, zero curve goes out thread elements and ground wire goes out thread elements and successively shows, thus low-voltage cable junction box in separating brake or It is that guarantee is flexibly connected according to first leading to ground wire, zero curve then three-phase firewire by outlet lid and outlet pedestal in making process； Conversely, being first disconnected three-phase firewire, zero curve then ground wire when open circuit, to guarantee the maximum protection to human body and equipment.
It is highly preferred that the outlet lid and outlet pedestal of wire-outlet rack are adopted and are made from an insulative material, the danger for avoiding wire-outlet rack from charging Danger.
Preferably, three-phase firewire goes out thread elements and is divided into that the first phase firewire goes out thread elements, the second phase firewire goes out thread elements and Three-phase firewire goes out thread elements, and it further comprises that each phase firewire outlet joint and each phase firewire go out that each phase firewire, which goes out thread elements, Wire connections, each phase firewire outlet joint go out wire connections connection with corresponding firewire.
It is highly preferred that it further comprises that zero curve outlet joint and zero curve go out wire connections, zero curve outlet that zero curve, which goes out thread elements, Connector goes out wire connections with zero curve and connects.
It is highly preferred that it further comprises that ground wire outlet joint and ground wire go out wire connections, ground wire outlet that ground wire, which goes out thread elements, Connector goes out wire connections with ground wire and connects.
It is highly preferred that the first phase firewire outlet joint, the second phase firewire outlet joint and third phase firewire outlet joint according to It is secondary it is stepped be distributed on outlet pedestal, zero curve outlet joint and ground wire outlet joint are disposed side by side on outlet pedestal one end Portion, each phase firewire that three-phase firewire goes out in thread elements goes out between wire connections and three-phase connecting element to be electrically connected by pluggable mode It connects, zero curve goes out wire connections and is electrically connected with zero curve connecting element by pluggable mode, and ground wire goes out wire connections and connect member with ground wire Part is electrically connected by overlapping mode.
It is highly preferred that the first phase firewire outlet joint, the second phase firewire outlet joint, third phase firewire outlet joint are going out It is successively distributed from high to low on line pedestal.
It is highly preferred that the position height of zero curve outlet joint and ground wire outlet joint on wire-outlet rack is lower than third phase firewire Position height of the outlet joint on wire-outlet rack.
Preferably, in wire inlet unit in each connector and outgoing line unit each connector the non-one-to-one correspondence in position.
It is highly preferred that the position of each connector and connector each in outgoing line unit is staggered in wire inlet unit.
More selection of land, the orthographic projection of three-phase firewire lead-in line joint is corresponding in one end of mounting plate, zero curve lead-in line joint, ground wire into Wire terminal, three-phase firewire outlet joint, zero curve outlet joint and ground wire outlet joint orthographic projection mounting plate the other end.
Another object of the present invention is to provide a kind of low-voltage cable junction box, in order to further in the low-voltage cable junction box Safety is improved, guarantees circuit safety operation, each outgoing line unit further comprises three fuses, each fuse is set It sets on the inside of the outlet lid of wire-outlet rack.
Preferably, each fuse correspondence goes out thread elements with each phase that three-phase firewire goes out thread elements and is flexibly connected, and melts Disconnected device contact knife position forms an arc-chutes from wire-outlet rack removal material；When outlet lid and outlet pedestal are closed, each fusing Device correspondence goes out thread elements with each phase that three-phase firewire goes out thread elements and connect, and entire route is in channel status；When open outlet lid, When outlet lid and outlet pedestal are detached from or when circuit occurs abnormal, each fuse is corresponding to go out thread elements with three-phase firewire Each phase goes out thread elements disconnection, and entire route is in off-state.
It is highly preferred that the both ends correspondence of each fuse, which goes out each phase in thread elements with three-phase firewire, goes out going out for thread elements Wire connections are flexibly connected.
It is highly preferred that a corresponding observation window, observation window are arranged between fuse and outlet lid on each fuse, lead to Cross the working condition that observation window observes corresponding fuse.
Preferably, the wire connections that go out that each phase goes out thread elements further comprise that an outlet connection assist and an outlet turn Connector is changed, each phase outlet connection assist is connected with corresponding each phase outlet joint, and connector is converted in each phase outlet It is connected with corresponding three-phase connecting element by pluggable mode.
As a kind of preferred embodiment, the both ends correspondence of each fuse goes out outlet in thread elements with each phase and connect The outlet conversion connector and outlet connection assist of part are flexibly connected.
Preferably, electric shock accidents occurs in order to prevent, protects personal safety, connection unit further comprises at least four exhausted Edge protective cover, it is each in three-phase connecting element to be connected element and zero curve connecting element is respectively at corresponding insulating protective cover It is interior.
It is highly preferred that insulating protective cover is in lattice-shaped envelope structure, each insulating protective cover is arranged on a mounting board, three It is connected and each in element is connected element and zero curve connecting element is separately positioned on inside corresponding insulating protective cover.
Preferably, low-voltage cable junction box further comprises a shell, and wire inlet unit, outgoing line unit and connection unit are removable It unloads and is mounted in shell.
Preferably, the wire inlet unit in low-voltage cable junction box, outgoing line unit and connection unit are integrally-formed, by even Wire inlet unit and outgoing line unit in order member are able to achieve the purpose of voltage cables feeder pillar low pressure shunting.
Compared with prior art, a kind of low-voltage cable junction box provided by the invention can connect except being designed using Three-phase five-wire The advantages of three-phase and four-line or Three-phase five-wire, applicability improves, ground wire grounded, and security performance improves, is also equipped with following advantages:
1, each three-phase firewire in the low-voltage cable junction box, zero curve and ground wire installation it is integral, wire inlet unit and go out Line unit be mounted on connection unit integrally change structure can make feeder pillar interior circuit construction part as standard component produce, matching Existing various cabinets or simple refit can be used, and can be greatly improved existing product specification and the different confusion of installation requirement Situation, so that such equipment applicability is more preferably；
2, wire inlet unit, outgoing line unit and connection unit are structurally reasonable, and connection unit is set to outgoing line unit and inlet wire list The lower section of member, while the mounting plate cross section of connection unit is the step arrangement that stairstepping adapts to wire inlet unit and outgoing line unit, Reduce the volume of whole equipment；
3, connection unit is mounted in the gap of staged arrangement, and especially the zero curve connector setting of zero curve is in three-phase fire Line goes out in the space that the arrangement of thread elements staged generates, to a greater extent using space in equipment to reduce small product size；
4, in separating brake or making process, guaranteed by this body structure of equipment according to first leading to ground wire, zero curve then three-phase Firewire；Conversely, being first disconnected three-phase firewire, zero curve then ground wire when open circuit, the safely controllable property of equipment is further improved, is avoided The dangerous of maloperation occurs, and the maximum protection to people and equipment is realized with this；
5, the three-phase firewire in wire inlet unit and outgoing line unit, zero curve and ground wire arrangement are overall beautiful, facilitate the line inspection or more It changes；
6, the outgoing line unit is respectively independent, is independent of each other, and when an outgoing line unit breaks down, does not influence other outlets The normal work of unit；
7, it is provided with multiple fuses in each outgoing line unit, guarantees circuit safety operation, further increases circuit Security performance；
8, multiple low-voltage cable junction boxes can share an inlet wire cable by increasing a wire inlet unit, so that route cloth Office is more apparent succinct.
In conclusion low-voltage cable junction box provided by the invention, security performance is improved, and is not influencing low-voltage cable branch Under the premise of case normal use, low-voltage cable junction box occupied area is reduced, utmostly protects equipment and personal safety, therefore Its application prospect is very wide.
Detailed description of the invention
Fig. 1 is a kind of installation diagram of preferred embodiment of low-voltage cable junction box provided by the invention；
Fig. 2 is a kind of perspective view of preferred embodiment of low-voltage cable junction box provided by the invention；
Fig. 3 is a kind of preferred embodiment perspective view of wire inlet unit in low-voltage cable junction box provided by the invention；
Fig. 4 is a kind of preferred embodiment explosive view of wire inlet unit in low-voltage cable junction box provided by the invention；
Fig. 5 is a kind of preferred embodiment perspective view of outgoing line unit in low-voltage cable junction box provided by the invention；
Fig. 6 is a kind of preferred embodiment explosive view of outgoing line unit in low-voltage cable junction box provided by the invention；
Fig. 7 is a kind of preferred embodiment perspective view of connection unit in low-voltage cable junction box provided by the invention；
Fig. 8 is a kind of preferred embodiment explosive view of connection unit in low-voltage cable junction box provided by the invention；
Fig. 9 is each connector in wire inlet unit in low-voltage cable junction box provided by the invention and outgoing line unit in connection unit On distribution schematic diagram；
Figure 10 is another preferred embodiment schematic diagram of low-voltage cable junction box provided by the invention；
Figure 11 is multiple low-voltage cable junction box connection schematic diagrams provided by the invention.
Specific embodiment
The present invention is made further to illustrate in detail, completely below with reference to embodiment and attached drawing.
Fig. 1 to Fig. 9 is a kind of preferred embodiment of low-voltage cable junction box provided by the invention.Such as Fig. 1 and Fig. 2 institute Show, which is designed using Three-phase five-wire, is suitble to the use of three-phase four-wire system and three-phase five-wire mode comprising one Wire inlet unit 10, multiple outgoing line units 20 (outgoing line unit 20 is only shown in figure) and a connection unit 30, wire inlet unit 10 It is separately electrically connected with connection unit 30 with outgoing line unit 20, it is respectively independent between outgoing line unit 20, it is independent of each other.Inlet wire Through the integral structure of connection unit 30, standardized designs can make feeder pillar interior circuit construction portion for unit 10 and outgoing line unit 20 It is allocated as producing for standard component, matching existing various cabinets or simple refit can be used.
Cable branch box further comprises a shell 40, and wire inlet unit 10, outgoing line unit 20 and connection unit 30 are detachable It is mounted in shell 40.
For using the device space, connection unit 30 is located at the lower section of outgoing line unit 20 and wire inlet unit 10.Outgoing line unit 20 With the riding upon on connection unit 30 in column of wire inlet unit 10.Wire inlet unit 10, outgoing line unit 20 hang down with connection unit 30 Straight setting.Wire inlet unit 10 is arranged in parallel with outgoing line unit 20, and as a kind of preferable embodiment, multiple outgoing line units 20 divide If ipsilateral with wire inlet unit 10.Outgoing line unit 20 can increase according to actual needs, preferably 3~5 groups of outgoing line units, at this time should Low-voltage cable junction box is one into three out or up to one into five goes out.At this point, wire inlet unit 10, outgoing line unit 20 and connection unit 30 at a reticular structure.
Fig. 3 is a kind of preferred embodiment perspective view of wire inlet unit in low-voltage cable junction box provided by the invention；Fig. 4 For a kind of preferred embodiment explosive view of wire inlet unit in low-voltage cable junction box provided by the invention.Such as Fig. 3 to Fig. 4 institute Show, which includes three-phase firewire inlet wire element 11, zero curve inlet wire element 12, ground wire inlet wire element 13 and leading-in bracket 14, three-phase firewire inlet wire element 11, zero curve inlet wire element 12 and ground wire inlet wire element 13 set up separately integral on leading-in bracket 14. Three-phase firewire inlet wire element 11, zero curve inlet wire element 12 and the ground wire inlet wire element 13 of wire inlet unit 10 and 30 activity of connection unit Connection.
In order to reduce a possibility that arbitrarily touching each element in wire inlet unit 10, leading-in bracket 14 further comprises an inlet wire lid 141 and an inlet wire pedestal 142, inlet wire lid 141 and inlet wire pedestal 142 cooperate, inlet wire lid 141 is integral setting, three-phase firewire Successively stepped be distributed on inlet wire pedestal 142 passes through for inlet wire element 11, zero curve inlet wire element 12 and ground wire inlet wire element 13 Inlet wire lid 141 is closed.The inlet wire lid 141 and inlet wire pedestal 142 of leading-in bracket 14 are adopted and are made from an insulative material, and thus are avoided that when entire When low-voltage cable junction box channel status, the danger that leading-in bracket 14 charges not only had protected equipment but also had protected personal safety.
The end that inlet wire lid 141 and inlet wire pedestal 142 are flexibly connected is positioned close to the one of three-phase firewire inlet wire element 11 The end that end, inlet wire lid 141 and inlet wire pedestal 142 are flexibly connected is flexibly connected by pin hole, in this way in installation or maintenance process In, when inlet wire lid 141 is gradually opened, ground wire inlet wire element 13, zero curve inlet wire element 12 and three-phase firewire inlet wire element 11 according to It is secondary to show, improve installation or maintenance process safety.
It further, further comprise an inlet wire lid locking bolt 1411 and an inlet wire pedestal locking bolt on leading-in bracket 14 1421, inlet wire lid locking bolt 1411 and inlet wire pedestal locking bolt 1421 are separately positioned in inlet wire lid 141 and inlet wire pedestal 142 and lean on The one end of near-earth line inlet wire element 13 prevents the inlet wire lid 141 on any opening leading-in bracket 14.
It further, further comprise a leading-in bracket guide pile 143 on leading-in bracket 14, the setting of leading-in bracket guide pile 143 exists The one end of the close three-phase inlet wire element 11 of inlet wire pedestal 142, in this way when inlet wire lid 142 is opened, leading-in bracket guide pile 143 Inlet wire lid 142 is positioned, prevents inlet wire lid 142 from rotating, influences wiring or maintenance process.
Three-phase firewire inlet wire element 11 divides for the first phase firewire inlet wire element 111, the second phase firewire inlet wire element 112 and Three-phase firewire inlet wire element 113, each phase firewire inlet wire element (111,112,113) further comprise that each phase firewire inlet wire connects Head (1111,1121,1131) and each phase firewire inlet wire connector (1112,1122,1132), each phase firewire lead-in line joint (1111,1121,1131) are connected with corresponding each phase firewire inlet wire connector (1112,1122,1132).Zero curve inlet wire element 12 further comprise zero curve lead-in line joint 121 and zero curve inlet wire connector 122, and zero curve lead-in line joint 121 is connected with zero curve inlet wire Part 122 connects.Ground wire inlet wire element 13 further comprises ground wire lead-in line joint 131 and ground wire inlet wire connector 132, ground wire inlet wire Connector 131 and ground wire inlet wire connector 132 connect.
First phase firewire lead-in line joint 1111, the second phase firewire lead-in line joint 1121, third phase firewire lead-in line joint 1131, Zero curve lead-in line joint 121 and ground wire lead-in line joint 131 is successively stepped is distributed on inlet wire pedestal 142, three-phase firewire inlet wire Each phase firewire inlet wire connector (1112,1122,1132) in element 11 is electrically connected with connection unit 30 by pluggable mode, Zero curve inlet wire connector 12 is electrically connected with connection unit 30 by pluggable mode, and ground wire inlet wire connector 13 and connection unit 30 are logical Cross overlapping mode electrical connection.
It is worth noting that, the first phase firewire lead-in line joint 1111, the second phase firewire lead-in line joint 1121, third phase firewire Lead-in line joint 1131, zero curve lead-in line joint 121 and ground wire lead-in line joint 131 the position of inlet wire pedestal 142 successively from high to low.
Fig. 5 is a kind of preferred embodiment perspective view of outgoing line unit in low-voltage cable junction box provided by the invention；Fig. 6 For a kind of preferred embodiment explosive view of outgoing line unit in low-voltage cable junction box provided by the invention.Such as Fig. 2, Fig. 5 and Fig. 6 Shown, which is connect with the wire inlet unit 10 by connection unit 30, which goes out including three-phase firewire Thread elements 21, zero curve go out thread elements 22, ground wire goes out thread elements 23 and wire-outlet rack 24, and three-phase firewire goes out thread elements 21, zero curve outlet Element 22 and ground wire go out thread elements 23 be divided into it is integral on wire-outlet rack 24.In outgoing line unit 20 each element separately with Connection unit 30 is flexibly connected.
For the purposes of reducing a possibility that arbitrarily touching each element in outgoing line unit 20, wire-outlet rack 24 further comprises one going out Line lid 241 and an outlet pedestal 242, outlet lid 241 and outlet pedestal 242 cooperate, 242 activity of outlet lid 241 and outlet pedestal Connection, outlet lid 241 are integral setting, and three-phase firewire goes out thread elements 21, zero curve goes out thread elements 22 and ground wire goes out thread elements 23 It is arranged on outlet pedestal 242 and is closed by outlet lid 241, zero curve goes out thread elements 22 and ground wire goes out thread elements 23 and is arranged side by side In the same end of outlet pedestal 242.The outlet lid 241 and outlet pedestal 242 of wire-outlet rack 24 are adopted and are made from an insulative material, and are avoided out Coil holder 24 is due to the danger that entire low-voltage cable junction box is powered and charges.
It is worth noting that, the end that is flexibly connected of outlet lid 241 and outlet pedestal 242 is positioned close to ground wire and goes out thread elements 23 one end, outlet lid 241 are flexibly connected by pin hole with the end that is flexibly connected of outlet pedestal 242, are installing or tieing up in this way During repairing, when outlet lid 241 is gradually opened, three-phase firewire goes out thread elements 21, zero curve goes out thread elements 22 and ground wire goes out line element Part 23 successively shows；Therefore low-voltage cable junction box passes through outlet lid 241 and outlet pedestal in separating brake or making process 242 flexible connection guarantees according to first leading to ground wire, zero curve then three-phase firewire；Conversely, being first disconnected three-phase firewire, zero curve when open circuit Then ground wire, to guarantee the maximum protection to human body and equipment.
Three-phase firewire go out thread elements 21 divide go out thread elements 211 for the first phase firewire, the second phase firewire goes out thread elements 212 and Three-phase firewire goes out thread elements 213, and it further comprises that each phase firewire outlet connects that each phase firewire, which goes out thread elements (211,212,213), Head (2111,2121,2131) and each phase firewire go out wire connections (2112,2122,2132), each phase firewire outlet joint (2111,2121,2131) go out wire connections (2112,2122,2132) connection with corresponding firewire.Zero curve goes out thread elements 22 into one Step includes zero curve outlet joint 221 and zero curve goes out wire connections 222, and zero curve outlet joint 221 and zero curve go out the company of wire connections 222 It connects.It further comprises that ground wire outlet joint 231 and ground wire go out wire connections 232, ground wire outlet joint 231 that ground wire, which goes out thread elements 23, Go out wire connections 232 with ground wire to connect.
First phase firewire outlet joint 2111, the second phase firewire outlet joint 2121, third phase firewire outlet joint 2131 It is successively stepped to be distributed on outlet pedestal 242, zero curve outlet connect 221 and ground wire outlet joint 231 be disposed side by side on outlet The one end of pedestal 242, each phase firewire that three-phase firewire goes out in thread elements 21 go out wire connections (211,212,213) with connect Unit 30 is electrically connected by pluggable mode, and zero curve goes out wire connections 222 and is electrically connected with connection unit 30 by pluggable mode, ground wire Wire connections 232 are electrically connected with connection unit 30 by overlapping mode out.Noticeable thing, the first phase firewire outlet joint 2111, the second phase firewire outlet joint 2121, third phase firewire outlet joint 2131 on outlet pedestal 242 successively from high to low The position height of distribution, zero curve outlet joint 221 and ground wire outlet joint 231 is lower than the height of third phase firewire outlet joint 2131 Degree.
Zero curve outlet joint 221 and ground wire outlet joint 231 are connected in order to prevent, lead to ground wire electrification, zero curve outlet connects An insulation board is equipped between first 221 and ground wire outlet joint 231.
Fig. 7 is a kind of preferred embodiment perspective view of connection unit in low-voltage cable junction box provided by the invention；Fig. 8 For a kind of preferred embodiment explosive view of connection unit in low-voltage cable junction box provided by the invention.Such as Fig. 7 to Fig. 8 institute Show, the connection unit 30 include three-phase connecting element 31, zero curve connecting element 32, ground wire connecting element 33 and mounting plate 34, three Element 31, zero curve connecting element 32 and the ground wire connecting element 33 of being connected successively are installed in parallel on mounting plate 34.
Three-phase firewire inlet wire element 11 and out thread elements 21 pass through the series connection of three-phase connecting element 31,12 and of zero curve inlet wire element Thread elements 22 connects member by ground wire with thread elements 23 out by the series connection of zero curve connecting element 32 and ground wire inlet wire element 13 out Part 33 is connected.
Three-phase connecting element 31 divide for first be connected element 311, second be connected element 312 and third phase connecting element 313.Three-phase firewire inlet wire element 11 and out thread elements 21 are connected element 311, the second phase with the first of three-phase connecting element 31 Connecting element 312 and third phase connecting element 313 are flexibly connected, zero curve inlet wire element 12 and thread elements 22 connect member with zero curve out Part 32 is flexibly connected, ground wire inlet wire element 13 and thread elements 23 is flexibly connected with ground wire connecting element 33 out.
As a kind of preferable embodiment, each phase firewire inlet wire connector in three-phase firewire inlet wire element 11 (1112, 1122,1132) corresponding with three-phase connecting element 31 first be connected element 311, second be connected element 312 and third phase It is electrically connected between connecting element 313 by pluggable mode, zero curve inlet wire connector 122 connect member with zero curve in zero curve inlet wire element 12 Part 32 is electrically connected by pluggable mode, and ground wire inlet wire connector 132 passes through with ground wire connecting element 33 in ground wire inlet wire element 13 Overlapping mode electrical connection；Three-phase firewire goes out each phase firewire in thread elements 21 and goes out wire connections (2112,2122,2132) and three-phase In connecting element 31 corresponding first be connected element 311, second be connected between element 312 and third phase connecting element 313 lead to Cross pluggable mode electrical connection, zero curve, which goes out zero curve in thread elements 22 and goes out wire connections 222 and zero curve connecting element 32, passes through plug side Formula electrical connection, ground wire, which goes out ground wire in thread elements 13 and goes out wire connections 132, to be electrically connected with ground wire connecting element 33 by overlapping mode.
In order to cooperate the installation site of each element in wire inlet unit 10 and outgoing line unit 20, the mounting plate 34 of connection unit 30 Cross section be stairstepping.Mounting plate 34 is by bending integrally-formed, mounting plate 34 into one as a preferred implementation manner, Step includes the first mounting plate 341, the second mounting plate 342 and third mounting plate 343, the first mounting plate 341 and the second mounting plate 342 It is connected by third mounting plate 343, the height of the first mounting plate 341 is higher than the second mounting plate 342.
Three-phase connecting element 31 is arranged on the first mounting plate 341, and each element that is connected (311,312,313) setting exists Height on first mounting plate 341 is consistent.Zero curve connecting element 32 and ground wire connecting element 33 are arranged in the second mounting plate 342 On.Zero curve connecting element 32 is the first peace with the difference in height of the element that is connected (311,312,313) each in three-phase connecting element Difference in height between loading board 341 and the second mounting plate 342.
In order to rationally utilize three-phase firewire to go out thread elements 21, zero curve goes out the space that 22 staged of thread elements is distributed generation, contracting Small footprint size, zero curve connecting element 32 are in the lower section that three-phase firewire goes out thread elements 21, ground wire connecting element 33 and mounting plate 34 342 end of the second mounting plate connection.
Second mounting plate, 342 end is bent to form a non-horizontal surface, 342 end of ground wire connecting element 33 and the second mounting plate The non-horizontal surface connection being bent to form.The cross section of ground wire connecting element 33 is L-shaped, the one side of ground wire connecting element 33 and The non-horizontal surface connection that two mounting plates 342 are bent to form.Second mounting plate, 342 end is preferably bent to form a vertical plane, ground wire The one side of connecting element 33 is connect with the vertical plane that 342 end of the second mounting plate is bent to form.Ground wire connecting element 33 and The connection type of two mounting plates, 342 end is preferably spirally connected.
It is worth noting that, mounting plate 34 is made of insulating materials, the of such ground wire connecting element 33 and mounting plate 34 The end of two mounting plates 342 connects, and ground wire connecting element 33 keeps ground connection, this ensure that it is ground wire grounded, increase entire low pressure The safety of cable branch box.
Even more noteworthy, three-phase firewire connecting element 31, zero curve connecting element 32, ground wire connecting element 33 are copper Row.
In order to improve safety, each outgoing line unit 20 further comprises three fuses 25, each fuse 25 241 inside of outlet lid of wire-outlet rack 24 is set, and the corresponding each phase for going out thread elements 21 with three-phase firewire of each fuse 25 goes out Thread elements (211,212,213) is flexibly connected, and fuse contact knife position removes material from outlet pedestal 242 and forms an arc-chutes； When outlet lid 241 and outlet pedestal 242 are closed, the corresponding each phase for going out thread elements 21 with three-phase firewire of each fuse 25 Thread elements (211,212,213) connects out, and entire route is in channel status；When opening outlet lid 241, outlet lid 241 and outlet When pedestal 242 is detached from, the corresponding each phase for going out thread elements 21 with three-phase firewire of each fuse 25 go out thread elements (211,212, 213) it disconnects, entire route is in off-state.A corresponding observation window 251 on each fuse 25, the setting of observation window 251 is molten Between disconnected device 25 and outlet lid 241, the working condition of corresponding fuse 25 is observed by observation window 251.
The both ends of each fuse 25 are corresponding and three-phase firewire go out each phase in thread elements 21 go out thread elements (211,212, 213) go out wire connections (2112,2122,2132) are flexibly connected.
Go out wire connections (2112,2122,2132) that each phase goes out thread elements (211,212,213) further comprise one going out Line connection assist (21121,21221,21321) and outlet conversion connector (21122,21222,21322), each phase goes out Line connection assist (21121,21221,21321) is connected with corresponding each phase outlet joint (2111,2121,2131), often One phase outlet is converted connector (21122,21222,21322) and is connected with corresponding three-phase connecting element 31 by pluggable mode.
The both ends of each fuse 25 are corresponding to be gone out to go out wire connections in thread elements (211,212,213) with each phase (2112,2122,2132) outlet conversion connector (21122,21222,21322) and outlet connection assist (21121, 21221,21321) it is flexibly connected.
Electric shock accidents occurs in order to prevent, protects personal safety, connection unit 30 further comprises that at least four insulation are protected Shield 35, each element that is connected (311,312,313) and zero curve connecting element 32 are respectively at pair in three-phase connecting element 31 In the insulating protective cover 35 answered.
Insulating protective cover 35 is in lattice-shaped envelope structure, each insulating protective cover 35 is arranged on mounting plate 34, three-phase Each element that is connected (311,312,313) and zero curve connecting element 32 are respectively at corresponding insulation protection in connecting element 31 Inside cover 35.
Fig. 9 is each connector in wire inlet unit in low-voltage cable junction box provided by the invention and outgoing line unit in connection unit On distribution schematic diagram.As shown in figure 9, the connector (1111,1121,1131) in the low-voltage cable junction box in wire inlet unit 10 Connector (2111,2121,2131) non-one-to-one correspondence in lengthwise position corresponding with outgoing line unit.As a kind of preferred implementation Connector (1111,1121,1131) (2111,2121,2131) corresponding with outgoing line unit in mode wire inlet unit 10 is vertical It is staggered on position.In addition, in order to using equipment space, reduce equipment volume, three-phase firewire lead-in line joint (1111,1121, 1131) orthographic projection is on the first mounting plate 341 of mounting plate 34, zero curve lead-in line joint 121, ground wire lead-in line joint 131, three-phase The orthographic projection of firewire outlet joint (2111,2121,2131), zero curve outlet joint 221 and ground wire outlet joint 231 is in mounting plate Third mounting plate 343 and/or the second mounting plate 343 on.Three-phase connecting element 31 each element that is connected (311,312, 313) it is distributed on the first mounting plate 341 of mounting plate below three-phase lead-in line joint (1111,1121,1131)；Zero curve connects It connects element 32 to be mounted on the second mounting plate 342, arranges and produce in three-phase firewire outlet joint (2111,2121,2131) staged In raw gap, lift one's head 2111 lower section in the first phase firewire；Ground wire connecting element 33 is in the side of the second mounting plate 342 On, the non-horizontal surface being bent to form with the side of the second mounting plate 342 is connect.
Figure 10 is another preferred embodiment schematic diagram of low-voltage cable junction box provided by the invention.Figure 11 is this hair Multiple low-voltage cable junction box connection schematic diagrams of bright offer.It as shown in Figure 10 and Figure 11, is the multiple low-voltage cable branches of realization Case can share one and enter line cable, reduce each low-voltage cable junction box and repeat wiring, avoid route in cable box many and diverse, so that Configuration is more apparent succinct, and inventor is on the basis of any structure of above-mentioned low-voltage cable box, each low-voltage cable branch Increase by a wire inlet unit 10 in case, multiple low-voltage cable junction boxes are achieved and are cascaded, multiple low-voltage cable junction boxes One can be shared and enter line cable.
As shown in Figure 10 and Figure 11, multiple low-voltage cable junction boxes are cascaded, and each low-voltage cable junction box includes Two wire inlet units 10, at least one outgoing line unit 20 and the connection unit 30 for connecting wire inlet unit 10 and outgoing line unit 20, two The setting of a 10 side by side parallel of wire inlet unit, 10 side by side parallel of outgoing line unit 20 and two wire inlet units, outgoing line unit 20 be arranged into Line unit 10 it is ipsilateral, wire inlet unit 10, outgoing line unit 20 are vertically arranged with connection unit 30.Cable is from each low pressure One wire inlet unit 10 of cable branch box enters, then goes out and another low-voltage cable junction box from another wire inlet unit 10 One wire inlet unit 10 connects, then and so on.In each low-voltage cable junction box, two wire inlet units 10 and outlet list It is parallel relationship between member 20, holding wire inlet unit 10 in this way is consistent with the voltage between outgoing line unit 20, thus multiple low Voltage in piezoelectricity pressure feeder pillar is to maintain unanimously.
Be it is necessary to described herein finally: above embodiments are served only for making technical solution of the present invention further detailed Ground explanation, should not be understood as limiting the scope of the invention, those skilled in the art's above content according to the present invention The some nonessential modifications and adaptations made all belong to the scope of protection of the present invention.

Claims (55)

1. a kind of low-voltage cable junction box characterized by comprising at least one wire inlet unit, multiple outgoing line units and one connect Order member, wire inlet unit includes three-phase firewire inlet wire element, zero curve inlet wire element, ground wire inlet wire element and leading-in bracket, wherein three Phase firewire inlet wire element, zero curve inlet wire element, ground wire inlet wire element are sequentially distributed integral on leading-in bracket, outgoing line unit packet Include that three-phase firewire goes out thread elements, zero curve goes out thread elements, ground wire goes out thread elements and wire-outlet rack, wherein three-phase firewire goes out thread elements, zero Line goes out thread elements, ground wire go out thread elements be sequentially distributed it is integral on wire-outlet rack；Each member in wire inlet unit and outgoing line unit Part is separately electrically connected with connection unit；When access, ground wire inlet wire element, zero curve inlet wire element, three-phase firewire inlet wire member Part is successively independently connect with connection unit, and it is successively independent that ground wire goes out thread elements, zero curve goes out thread elements, three-phase firewire goes out thread elements Ground is connect with connection unit；When breaking, three-phase firewire inlet wire element, zero curve inlet wire element, ground wire inlet wire element are successively independently Separated with connection unit, three-phase firewire goes out thread elements, zero curve goes out thread elements, ground wire go out thread elements successively independently with connection unit Separation.
2. low-voltage cable junction box as described in claim 1, it is characterised in that: the wire inlet unit is parallel with outgoing line unit to be set It sets.
3. low-voltage cable junction box as described in claim 1, it is characterised in that: the wire inlet unit, outgoing line unit and even Order member is vertically arranged.
4. low-voltage cable junction box as described in claim 1, it is characterised in that: the wire inlet unit, outgoing line unit and connection Unit is at a reticular structure.
5. low-voltage cable junction box as described in claim 1, it is characterised in that: each low-voltage cable junction box further comprises Two wire inlet units, two wire inlet unit side by side parallel settings, two wire inlet units and outgoing line unit are connect with connection unit.
6. low-voltage cable junction box as claimed in claim 5, it is characterised in that: multiple low-voltage cable junction boxes are cascaded A cable is shared, cable enters from a wire inlet unit of each low-voltage cable junction box, then from another inlet wire Unit goes out to connect with a wire inlet unit of another low-voltage cable junction box.
7. the low-voltage cable junction box as described in claim 1-6 is any, it is characterised in that: the inlet wire in low-voltage cable junction box Unit and outgoing line unit link into an integrated entity through connection unit.
8. low-voltage cable junction box as described in claim 1, it is characterised in that: connection unit is located at outgoing line unit and inlet wire list The lower section of member.
9. low-voltage cable junction box as described in claim 1, it is characterised in that: outgoing line unit and wire inlet unit setting up in column On connection unit.
10. low-voltage cable junction box as described in claim 1, it is characterised in that: multiple outgoing line units are divided into wire inlet unit It is ipsilateral.
11. low-voltage cable junction box as described in claim 1, it is characterised in that: three-phase firewire inlet wire element, zero curve inlet wire member Part and ground wire inlet wire element is successively stepped is distributed on leading-in bracket.
12. low-voltage cable junction box as described in claim 1, it is characterised in that: zero curve goes out thread elements and ground wire goes out thread elements It is arranged at the same end of wire-outlet rack.
13. low-voltage cable junction box as described in claim 1, it is characterised in that: zero curve goes out thread elements and ground wire goes out thread elements It is disposed side by side on the same end of wire-outlet rack.
14. low-voltage cable junction box as described in claim 1, it is characterised in that: connection unit includes three-phase connecting element, zero Line connecting element, ground wire connecting element and mounting plate, three-phase connecting element, zero curve connecting element and ground wire connecting element are mounted on On mounting plate.
15. low-voltage cable junction box as claimed in claim 14, it is characterised in that: three-phase connecting element, zero curve connecting element It is successively installed in parallel on mounting plate with ground wire connecting element, wherein three-phase firewire inlet wire element is connected with thread elements out by three It connects element series connection, zero curve inlet wire element and thread elements passes through the series connection of zero curve connecting element and ground wire inlet wire element and outlet out Element is connected by ground wire connecting element.
16. low-voltage cable junction box as claimed in claim 15, it is characterised in that: three-phase firewire inlet wire element and out thread elements It is flexibly connected, zero curve inlet wire element and thread elements is flexibly connected with connecting element out, ground wire inlet wire element and goes out with connecting element Thread elements is flexibly connected with connecting element.
17. low-voltage cable junction box as claimed in claim 15, it is characterised in that: three-phase firewire inlet wire element is connected with three Interelement is electrically connected by pluggable mode, zero curve inlet wire element with and zero curve connecting element be electrically connected by pluggable mode, ground wire Inlet wire element is electrically connected with ground wire connecting element by overlapping mode；Three-phase firewire, which goes out between thread elements and three-phase connecting element, to be passed through Pluggable mode electrical connection, zero curve go out thread elements with and zero curve connecting element be electrically connected by pluggable mode, ground wire go out thread elements and Ground wire connecting element is electrically connected by overlapping mode.
18. low-voltage cable junction box as claimed in claim 15, it is characterised in that: three-phase connecting element be in three-phase firewire into The lower section of thread elements, zero curve connecting element are in the lower section that three-phase firewire goes out thread elements, and the one of ground wire connecting element and mounting plate Side end connection.
19. low-voltage cable junction box as claimed in claim 18, it is characterised in that: zero curve connecting element and three-phase connecting element It is not located at same level.
20. low-voltage cable junction box as claimed in claim 18, it is characterised in that: the cross section of mounting plate is stairstepping.
21. low-voltage cable junction box as claimed in claim 20, it is characterised in that: mounting plate is integrally formed by bending.
22. low-voltage cable junction box as claimed in claim 21, it is characterised in that: mounting plate is by being spliced.
23. low-voltage cable junction box as claimed in claim 20, it is characterised in that: three-phase connecting element is arranged on a mounting board One end, each element setting height on a mounting board that is connected is consistent.
24. low-voltage cable junction box as claimed in claim 20, it is characterised in that: mounting plate is arranged in zero curve connecting element On the other end, zero curve connecting element is in the lower section that three-phase firewire goes out thread elements.
25. low-voltage cable junction box as claimed in claim 20, it is characterised in that: mounting plate is arranged in ground wire connecting element On the other end, ground wire connecting element is connect with mounting plate end.
26. low-voltage cable junction box as claimed in claim 25, it is characterised in that: it is non-horizontal that mounting plate end is bent to form one Face, ground wire connecting element are connect with the non-horizontal surface that mounting plate end is bent to form.
27. low-voltage cable junction box as claimed in claim 26, it is characterised in that: the cross section of ground wire connecting element is L-shaped, The one side of ground wire connecting element is connect with the non-horizontal surface that mounting plate is bent to form.
28. low-voltage cable junction box as claimed in claim 27, it is characterised in that: it is vertical that mounting plate end is bent to form one The one side in face, ground wire connecting element is connect with the vertical plane that mounting plate end is bent to form.
29. low-voltage cable junction box as claimed in claim 25, it is characterised in that: ground wire connecting element and mounting plate end Connection type is to be spirally connected.
30. low-voltage cable junction box as described in claim 1, it is characterised in that: three-phase connecting element, zero curve connecting element, Ground wire connecting element is copper bar.
31. the low-voltage cable junction box as described in claim 17,19,22,23,24 or 25 are any, it is characterised in that: leading-in bracket Including inlet wire lid and inlet wire pedestal, inlet wire lid and the activity of inlet wire pedestal cooperate, and inlet wire lid is integral setting, three-phase firewire inlet wire Successively stepped be distributed on inlet wire pedestal is closed by inlet wire lid for element, zero curve inlet wire element and ground wire inlet wire element.
32. low-voltage cable junction box as claimed in claim 31, it is characterised in that: what inlet wire lid and inlet wire pedestal were flexibly connected End is positioned close to one end of three-phase firewire inlet wire element, and inlet wire lid is flexibly connected with inlet wire pedestal by pin hole.
33. low-voltage cable junction box as claimed in claim 31, it is characterised in that: further comprise an inlet wire lid on leading-in bracket Locking bolt and an inlet wire pedestal locking bolt, inlet wire lid locking bolt and inlet wire pedestal locking bolt are separately positioned on inlet wire lid and inlet wire bottom Close to the one end of ground wire inlet wire element in seat.
34. low-voltage cable junction box as claimed in claim 31, it is characterised in that: further comprise a leading-in bracket on leading-in bracket The one end of the close three-phase inlet wire element of inlet wire pedestal is arranged in guide pile, leading-in bracket guide pile, when inlet wire lid is opened, into Coil holder guide pile positions inlet wire lid.
35. low-voltage cable junction box as claimed in claim 31, it is characterised in that: the inlet wire lid and inlet wire pedestal of leading-in bracket are adopted It is made from an insulative material.
36. low-voltage cable junction box as claimed in claim 31, it is characterised in that: three-phase firewire inlet wire element is divided into the first phase Firewire inlet wire element, the second phase firewire inlet wire element and third phase firewire inlet wire element, each phase firewire inlet wire element are further Including each phase firewire lead-in line joint and each phase firewire inlet wire connector, each phase firewire lead-in line joint and corresponding each phase The connection of firewire inlet wire connector；Zero curve inlet wire element further comprises zero curve lead-in line joint and zero curve inlet wire connector, zero curve into Wire terminal is connected with zero curve inlet wire connector；Ground wire inlet wire element further comprises that ground wire lead-in line joint is connected with ground wire inlet wire Part, ground wire lead-in line joint are connected with ground wire inlet wire connector.
37. low-voltage cable junction box as claimed in claim 36, it is characterised in that: the first phase firewire lead-in line joint, the second phase Firewire lead-in line joint, third phase firewire lead-in line joint, zero curve lead-in line joint and ground wire lead-in line joint is successively stepped is distributed in On inlet wire pedestal.
38. low-voltage cable junction box as claimed in claim 37, it is characterised in that: each phase in three-phase firewire inlet wire element It is electrically connected between firewire inlet wire connector and three-phase connecting element by pluggable mode, zero curve inlet wire connector and zero curve connecting element It is electrically connected by pluggable mode, ground wire inlet wire connector is electrically connected with ground wire connecting element by overlapping mode.
39. low-voltage cable junction box as claimed in claim 38, it is characterised in that: the first phase firewire lead-in line joint, the second phase The position zero of firewire lead-in line joint, third phase firewire lead-in line joint, zero curve lead-in line joint and ground wire lead-in line joint in inlet wire pedestal Line is successively from high to low.
40. low-voltage cable junction box as claimed in claim 38, it is characterised in that: wire-outlet rack further comprise an outlet lid and One outlet pedestal, outlet lid and outlet base engagement, outlet lid are integral setting, and three-phase firewire goes out thread elements, zero curve outlet Element and ground wire go out thread elements and are arranged on outlet pedestal, and zero curve goes out thread elements and ground wire goes out thread elements and is disposed side by side on outlet bottom The same end of seat.
41. low-voltage cable junction box as claimed in claim 40, it is characterised in that: outlet lid is flexibly connected with outlet pedestal End is positioned close to the one end that ground wire goes out thread elements, and outlet lid is flexibly connected with outlet pedestal by pin hole.
42. low-voltage cable junction box as claimed in claim 40, it is characterised in that: the outlet lid and outlet pedestal of wire-outlet rack are adopted It is made from an insulative material.
43. low-voltage cable junction box as claimed in claim 42, it is characterised in that: three-phase firewire goes out thread elements and is divided into the first phase Firewire goes out thread elements, the second phase firewire goes out thread elements and third phase firewire outlet element, and it is further that each phase firewire goes out thread elements Go out wire connections including each phase firewire outlet joint and each phase firewire, each phase firewire outlet joint goes out with corresponding firewire Wire connections connection；It further comprises that zero curve outlet joint and zero curve go out wire connections, zero curve outlet joint that zero curve, which goes out thread elements, Go out wire connections with zero curve to connect；It further comprises that ground wire outlet joint and ground wire go out wire connections, ground wire that ground wire, which goes out thread elements, Outlet joint goes out wire connections with ground wire and connects.
44. low-voltage cable junction box as claimed in claim 43, it is characterised in that: the first phase firewire outlet joint, the second phase Firewire outlet joint and third phase firewire outlet joint is successively stepped is distributed on outlet pedestal, zero curve outlet joint and ground Line outlet joint is disposed side by side on outlet pedestal one end.
45. low-voltage cable junction box as claimed in claim 44, it is characterised in that: three-phase firewire goes out each phase in thread elements Firewire goes out between wire connections and three-phase connecting element to be electrically connected by pluggable mode, and zero curve goes out wire connections and zero curve connecting element It is electrically connected by pluggable mode, ground wire goes out wire connections and is electrically connected with ground wire connecting element by overlapping mode.
46. low-voltage cable junction box as claimed in claim 45, it is characterised in that: the first phase firewire outlet joint, the second phase Firewire outlet joint, third phase firewire outlet joint are successively distributed from high to low on outlet pedestal.
47. low-voltage cable junction box as claimed in claim 46, it is characterised in that: zero curve outlet joint and ground wire outlet joint Position height be lower than third phase firewire outlet joint height.
48. low-voltage cable junction box as claimed in claim 47, it is characterised in that: zero curve outlet joint and ground wire outlet joint Between be equipped with an insulation board.
49. low-voltage cable junction box as claimed in claim 43, it is characterised in that: each outgoing line unit further comprises three A fuse, each fuse are arranged on the inside of the outlet lid of wire-outlet rack, each fuse is corresponding to go out line element with three-phase firewire Each phase of part goes out thread elements flexible connection, and fuse contact knife position forms an arc-chutes from wire-outlet rack removal material.
50. low-voltage cable junction box as claimed in claim 49, it is characterised in that: a corresponding observation on each fuse Window, observation window are arranged between fuse and outlet lid.
51. low-voltage cable junction box as claimed in claim 49, it is characterised in that: each phase goes out the wire connections out of thread elements Further comprise an outlet connection assist and an outlet conversion connector, each phase outlet connection assist with it is corresponding each The connection of phase outlet joint, each phase outlet conversion connector are connected with corresponding three-phase connecting element by pluggable mode.
52. low-voltage cable junction box as claimed in claim 51, it is characterised in that: the both ends of each fuse are corresponding and every One phase goes out in thread elements the outlet conversion connector of wire connections and outlet connection assist is flexibly connected.
53. low-voltage cable junction box as claimed in claim 11, it is characterised in that: connection unit further comprises at least four Insulating protective cover, it is each in three-phase connecting element to be connected element and zero curve connecting element is respectively at corresponding insulating protective cover It is interior.
54. low-voltage cable junction box as claimed in claim 53, it is characterised in that: insulating protective cover is in lattice-shaped envelope knot Structure, each insulating protective cover are arranged on a mounting board, each element and zero curve connecting element of being connected in three-phase connecting element It is separately positioned on inside corresponding insulating protective cover.
55. low-voltage cable junction box as described in claim 1, it is characterised in that: low-voltage cable junction box further comprises one Shell, wire inlet unit, outgoing line unit and connection unit are removably mounted in shell.
CN201410148288.7A 2014-04-14 2014-04-14 A kind of low-voltage cable junction box Active CN104979792B (en)

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CN109301739B (en) * 2018-11-14 2020-03-03 国网浙江新昌县供电有限公司 Insulation isolation device for live replacement of circuit breaker in low-voltage cable branch box
CN111182722B (en) * 2020-02-26 2021-01-29 王致刚 MCU application circuit board of modularization concatenation

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