CN104979792A - Low-voltage cable branch box - Google Patents
Low-voltage cable branch box Download PDFInfo
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- CN104979792A CN104979792A CN201410148288.7A CN201410148288A CN104979792A CN 104979792 A CN104979792 A CN 104979792A CN 201410148288 A CN201410148288 A CN 201410148288A CN 104979792 A CN104979792 A CN 104979792A
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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
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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
- H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
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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
- 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)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Cable Accessories (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention discloses a low-voltage cable branch box. The low-voltage cable branch box comprises at least one wire inlet unit, multiple wire outlet units and one connecting unit. The wire inlet unit comprises a three-phase live wire inlet element, a zero wire inlet element, a ground wire inlet element and a wire inlet frame, wherein each wire inlet element is separately arranged on the wire inlet frame to form an integral body. Each wire outlet unit comprises a three-phase live wire outlet element, a zero wire outlet element, a ground wire outlet element and a wire outlet frame, wherein each wire outlet element is separately arranged on the wire outlet frame to form an integral body. The elements in the wire inlet unit and the wire outlet units are respectively independently in electrical connection with the connecting unit. Compared to the prior art, the low-voltage cable branch box employs a three-phase five-wire design, can be connected with three-phase four wires or three-phase five wires and employs a three-phase live wire, zero wire and ground wire modular design. At the same time, a zero wire connecting piece is arranged in a space generated by stepped arrangement of three-phase live wires, the space is fully utilized, the land occupation area is reduced, a three-phase five-wire standard design is adopted, and the low-voltage cable branch box is suitable for large-scale production. Therefore, the application prospect is quite wide.
Description
Technical field
The present invention relates to a kind of low-voltage distribution system device, specifically, relate to a kind of low-voltage cable junction box, belong to cable branch technical field.
Background technology
Low-voltage distribution system refers to that voltage is less than the distribution system of 1kV, is made up of distribution substation (normally the transmission voltage of electrical network being reduced to distribution voltage), high-tension distributing line, distribution transformer, low-voltage distributing line and corresponding Control protection equipment.Wherein the distribution system of 0.4kV has been widely used in the electric power system of three-phase alternating current 380/220V, the 55Hz such as Urban Residential District, industrial and mining enterprises, job site, is specially adapted in the three-phase of the multiple communal facilitys such as avenue, universities and colleges, residential block or single-phase power transmission and distribution or single-phase lighting system as the use accepting or distribute electric energy.
In low-voltage network, transmission line generally adopts three-phase four-wire system, and wherein three-phase refers to A, B, C three-phase, and four circuits in four lines represent A, B, C three-phase firewire and zero line N respectively.The effect of zero line N is: when threephase load is asymmetric, the current potential of guarantee zero line is zero, to eliminate neutral point potential change, makes the phase voltage of each phase load equal power supply phase voltage, and has nothing to do with load variations; If there is a phase open circuit in three-phase, only can affect this phase, all the other two phase voltages still remain unchanged, and the electric equipment be connected in this two-phase still can normally work.Therefore, the zero line in three-phase four-wire system is once open circuit for some reason, and in the asymmetric situation of threephase load, can produce neutrality locus transfer, cause imbalance of three-phase voltage, some phase voltages are too high, and electric equipment may be caused to burn; Pressing through mutually of having is low, and electric equipment cannot normally use.In order to higher fail safe, also more and more advocate three-phase five-wire mode now, three-phase five-wire mode is a many ground wire PE, neutral line N and ground wire E iterative earthings compared with three-phase four-wire system, duplicate protection.
What low-voltage distribution system higher pressure distribution system more needed to arouse attention is the disaster hidden-trouble that the electric leakage in low-voltage distribution brings, mainly after electric wiring or apparatus insulated damage, under certain circumstances, can leak electricity to close material (threading metal tube, electric device metal shell, live wood etc.), make topical substance charged, cause serious even fatal electric shock to people, thus produce spark, electric arc, overheated high temperature etc. and cause fire.When there is electric leakage and run into carapace short in electric equipment; electric current will make device housings, zero line protection line (protective earthing line), zero line (greatly) form closed-loop path; usual leakage current will be very large, can make fuse action and cut off the electricity supply to realize protection.But because the existence (artificially may strengthen several times as fuse specification or replaced by copper wire, earthing device is undesirable causes that earth resistance is comparatively large, ground connection terminal connects loosely, protective device is malfunctioning or arrange unreasonable etc.) of many reasons can make overcurrent protective device not have overcurrent protection; Such electric leakage is once occur, and by sustainable existence, and then cause getting an electric shock or electrical fire accident, many leakage fire cases also demonstrate this point.
Cause the factor of electric leakage a lot, be summed up mainly contain following several: mostly the installation of (1) low-voltage distribution system is non-electric specialty personnel, quality is uneven, difficult quality guarantee, show: moist or have in the environment of acid, caustic corrosion, electric wire surface, equipment is protected and directly installs; During wiring, cutter, pincers, hammer equivalent damage insulating barrier; Terminal quality of connection and insulating bag roll undesirable etc. the non-standard phenomena of quality; (2) electric wiring or equipment failure to inspect, because of overload or the reason insulation degradation such as service life is longer; (3) personation, electric product of poor quality is selected; (4) extraneous factor: moisture immersion, extruding, damaged by rats etc.Electric leakage causes the reason of fire to mainly contain: (1) leakage current directly causes fire; leak current fault point contacts under normal circumstances can be unreal, seemingly connects non-connecing, cause contact resistance larger; make overcurrent protective device be difficult to action, electric arc can be produced in fault point simultaneously.According to survey, only the arc temperature of the electric current of 0.5A more than more than 2000 DEG C, can be enough to all combustibles that ignites.(2) the binding post place of protection zero line or protection ground wire connects unreal, causes fire.Phase line is connected unreal with zero line binding post, and equipment work is abnormal, can Timeliness coverage process, and the binding post of protection zero line or ground wire connects unreal, and resistance is excessive, and equipment is work as usual, and fault point is then not easily found.Once electric leakage, due to too pine or the corrosion etc. of fault point joint, there is high resistant, cause local overheating, splicing ear place produces high temperature or electric arc, and can ignite combustible around, or burn out appliance socket, switch etc., ignite wooden base, this is comparatively common electric leakage form on fire.In July, 2000, namely Hangzhou restaurant distribution board fire is 1 example, and before catching fire, restaurant closes, and load is at a low ebb.When fire occurs, electric consumption on lighting is still normal.Seriously carbonize through looking into total air switch in distribution box, protection zero line binding post has metal concave to melt trace, conforms to drain conditions.(3) fire that causes of electrical leakage voltage; after electric leakage continues generation; because electric current can not scatter; and lead another earthing, loop looking for resistance little; the metal shell of all electric devices be attached thereto can be made with voltage to earth along zero line protection line (earth connection) conduction; at this moment just may become fire origin to the hardware arcing such as the dim pipe of water, gas pipe of contiguous electronegative potential, only the ME for maintenance of 20V just can make electric arc recur, and can ignite combustible equally around.If to gas pipe arcing, just may puncture tube wall, cause gas leak to cause fire.It should be noted that, due to the conduction of voltage, leakage and point of origin are not necessarily consistent.(4) if the wire diameter of protection zero line or protection ground wire is selected too small, when by larger leakage current, circuit temperature rise is very fast, equally also fire hazard.
Be not difficult to find out from above, the various kinds of equipment of low-voltage distribution system is for security requirement and be not less than high-tension distribution equipment, and What is more, and low-voltage distribution apparatus requires higher fail safe and ease-to-operate on the contrary.
Low-voltage cable junction box as a requisite controller switching equipment in low-voltage distribution system.Cable branch box is capacity little individual load distribution a kind of controller switching equipment of developing when comparatively concentrating, and it is along with the development of power distribution network cable process.The low-voltage cable junction box of most getting up early adopts casing coupling to connect cable on line copper bar and its to use, and carry out the connection of cable multi-branch, but this type of feeder pillar directly can not operate to every road, only use as cable branch; When branch line load circuit breaks down, then need to close upper level contactor, thus in whole feeder pillar, all line circuits all need to have a power failure, power-off time is long, is unfavorable for now to the requirement of power system restoration; In addition, the live part of this type of feeder pillar is exposure, also brings certain hidden danger to fail safe when overhauling.
For the various problems of above-mentioned original branch case, to feeder pillar in prior art, especially low-voltage cable junction box has carried out multiple improvement.
A kind of cable branch box disclosed in Chinese patent application CN201310425891, architecture advances has been carried out to feeder pillar body structure, the feeder pillar utilizing the cover plate in trimming and monoblock aluminium sheet to form combines, replace cuboid feeder pillar in the past, save the material that trimming is saved, reduce commissure and welding, but in this cable branch box, the arrangement problem of circuit structure can not solve; A kind of cable branch box disclosed in Chinese patent application CN201210321923, it comprises cable vault, bus-bar room, explosion-proof antitheft casing, rain cover, potential indicator, fault detector and microcomputer controller, structure is simple, security reliability is high, be convenient to fast finding fault, but above-mentioned setting can not solve the problem of circuit structure itself; A kind of all-sealed low-voltage cable junction box disclosed in Chinese patent application CN201310451536, its box sealing, busbar outside adopts insulating material to make, busbar skeleton is provided with the socket be connected with cable, employing double containment is protected, and prevents circuit from meeting water short circuit, but adopts insulating material around busbar in this kind of low-voltage cable junction box, affect electric conductivity, and maintenance is inconvenient; Low-voltage cable junction box disclosed in Chinese patent CN201320069330, it comprises base plate, base plate is provided with three-phase bus bar, closes the insulating cover of busbar, each insulating cover is provided with spliced eye, when installing output module, do not need more erecting tools, simple and convenient, but in this low-voltage cable junction box, the safety problem of zero line can not solve; Low-voltage cable junction box outlet row array structure disclosed in Chinese patent CN201220586472, triple line and zero line outlet entirety of confluxing presents level course column structure, there will not be cable juxtaposition phenomenon, but this triple line is connected with feeder pillar by bolt with zero line, connected mode is complicated, is not easy to quick installation and maintenance; A kind of low-voltage cable junction box disclosed in Chinese patent CN200920180719 utility model; the three-phase line of this low-voltage cable junction box all adopts band fuse type killer switch; line is protected; power cable and case are become, low-tension switch cabinet etc. couples together; for cable system provides very big convenience; but once an outgoing line unit breaks down in this kind of low-voltage cable junction box; whole wire inlet unit fault will be caused; like this thus outgoing line unit all by power-off; power-off area is wide, and maintenance difficult increases.
In the multiple improvement to sum up low-voltage cable junction box carried out, the improvement of circuit in the feeder pillar that present low-voltage cable junction box product does not relate to cable, and the key problem of this type of product unresolved: be generally all three-phase four-wire system in low-voltage cable junction box product now, ground wire is not had to arrange, and triple line and zero line do not combine, but employing is provided separately, triple line is arranged in the bus-bar system in low-voltage cable junction box, neutral line N(zero line) rely on casing to arrange, whole low-voltage cable junction box needs bus-bar system to coordinate casing to use, zero line is outside exposed, when imbalance of three-phase voltage or neutral point potential change, zero line is just likely charged, especially zero line is still the mode adopting copper bar to add manual wiring, people can produce Danger Electric shock risk once touch exposed zero line on casing because of carelessness.Further, in the separating brake of present low-voltage cable junction box or making process, all cannot ensure it is according to first earthing line, zero line then three-phase firewire by this body structure of equipment; Otherwise, be three-phase firewire, the zero line then ground wire that first breaks during open circuit, need to judge charged situation by professional knowledge, can not to the maximum protection of people and equipment; In addition the non-respective independence of each outlet unit, when an outlet unit breaks down, affects the normal work of other outlet units, power-off area is increased, and increases the difficulty of maintenance overhaul.Therefore, need a kind of high safety performance badly and overhaul easy low-voltage cable junction box.
Summary of the invention
For the problems referred to above that prior art exists, the object of this invention is to provide a kind of low-voltage cable junction box, this low-voltage cable junction box adopts three-phase five-wire mode, three-phase firewire, zero line and ground wire are installed in aggregates, this integral structure can make feeder pillar interior circuit construction part produce as standard component, mate existing various casing or simple refit can use, the trouble waters that can be greatly improved existing product specification and installation requirement differ, make this kind equipment applicability better.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of low-voltage cable junction box, comprise: at least one wire inlet unit, multiple outgoing line unit and a linkage unit, wire inlet unit comprises three-phase firewire inlet wire element, zero line inlet wire element, ground wire inlet wire element and leading-in bracket, wherein each inlet wire element is divided on leading-in bracket in aggregates, outgoing line unit comprises that three-phase firewire goes out kind of thread elements, zero line goes out kind of thread elements, ground wire goes out kind of thread elements and wire-outlet rack, wherein respectively goes out kind of thread elements and is divided on wire-outlet rack in aggregates; Each element in wire inlet unit and outgoing line unit is separately electrically connected with linkage unit.
Preferably, wire inlet unit is connected in aggregates with outgoing line unit through linkage unit.
Preferably, wire inlet unit and outgoing line unit be arranged in parallel; Wire inlet unit, outgoing line unit are all vertical with linkage unit to be arranged; Now, wire inlet unit, outgoing line unit become a network structure with linkage unit, and wire inlet unit and outgoing line unit be integration-in-one structure on linkage unit.
As one preferably embodiment, outgoing line unit can increase according to actual needs, is preferably 3 ~ 5 groups of outgoing line units, and now this low-voltage cable junction box is to go out into three or most as many as one enters five and goes out.
As one preferably embodiment, wire inlet unit can increase according to actual needs, be preferably 2 groups of wire inlet units, the wire inlet unit now increased by each low-voltage cable junction box is connected with the wire inlet unit of another low-voltage cable junction box inlet wire, thus multiple low-voltage cable junction box can be realized can share a lambda line cable, make winding displacement more succinct.
Preferably, three-phase firewire inlet wire element, zero line inlet wire element and ground wire inlet wire element is stepped is successively distributed on leading-in bracket.
Preferably, zero line goes out kind of thread elements and ground wire goes out the same end that kind of thread elements is all arranged on wire-outlet rack, is preferably disposed side by side on the same end of wire-outlet rack.
Preferably, linkage unit comprises three-phase Connection Element, zero line Connection Element, ground wire Connection Element and mounting panel, and three-phase Connection Element, zero line Connection Element and ground wire Connection Element are installed on a mounting board.
More preferably, three-phase Connection Element, zero line Connection Element and ground wire Connection Element are installed in parallel on mounting panel successively, wherein three-phase firewire inlet wire element and go out kind of thread elements by the series connection of three-phase Connection Element, zero line inlet wire element with go out kind of thread elements by the series connection of zero line Connection Element and ground wire inlet wire element with go out kind of thread elements and connected by ground wire Connection Element.
More preferably, above-mentioned each inlet wire element, go out between kind of thread elements with Connection Element to be flexibly connected, as one preferably execution mode, three-phase firewire inlet wire element is electrically connected by pluggable mode with between three-phase Connection Element, zero line inlet wire element is electrically connected by pluggable mode with zero line Connection Element, and ground wire inlet wire element is electrically connected by overlapping mode with ground wire Connection Element; Three-phase firewire is gone out between kind of thread elements with three-phase Connection Element and is electrically connected by pluggable mode, zero line go out kind of thread elements with and zero line Connection Element be electrically connected by pluggable mode, ground wire is gone out kind of thread elements and is electrically connected by overlapping mode with ground wire Connection Element.
Another object of the present invention is to provide a kind of low-voltage cable junction box, in this low-voltage cable junction box, wire inlet unit, outgoing line unit and linkage unit are rational in infrastructure, utilize the device space to greatest extent, reduce the floor space of whole equipment, linkage unit, on the basis of arbitrary said structure, is arranged at the below of outgoing line unit and wire inlet unit by this low-voltage cable junction box.
More preferably, outgoing line unit and in column the setting up on linkage unit of wire inlet unit.As one preferably execution mode, multiple outgoing line unit sets up the homonymy with wire inlet unit separately.
More preferably, three-phase Connection Element is in the below of three-phase firewire inlet wire element.
Preferably, zero line Connection Element and three-phase Connection Element are not positioned at same plane.
Another object of the present invention is to provide a kind of low-voltage cable junction box, in order to coordinate the installation site of each element in wire inlet unit and outgoing line unit, utilize space in case further, reduce equipment volume, the mounting panel cross section of linkage unit, further on the basis of arbitrary said structure, is stairstepping by this low-voltage cable junction box.
More preferably, mounting panel is formed in one, and adopts bending forming; As a kind of preferred implementation, mounting panel adopts and is spliced.
Preferably, three-phase Connection Element arranges one end on a mounting board, and the height that each element that is connected is arranged on a mounting board is consistent.
More preferably, zero line Connection Element and ground wire Connection Element are arranged on the other end of mounting panel.
Preferably, in order to the space that Appropriate application three-phase firewire goes out kind of thread elements, zero line goes out kind of thread elements staged distribution generation, reduce floor space, zero line Connection Element is in the below that three-phase firewire goes out kind of thread elements, and ground wire Connection Element is connected with mounting panel end.
More preferably, the side end on mounting panel is bent to form a non-horizontal surface, and the non-horizontal surface that ground wire Connection Element is bent to form with this mounting panel end is connected.
More preferably, the cross section of ground wire Connection Element is L-shaped, and the non-horizontal surface that a side and this mounting panel end of ground wire Connection Element are bent to form is connected.
More preferably, this mounting panel end is bent to form a vertical plane, and the vertical plane that a side and this mounting panel end of ground wire Connection Element are bent to form is connected.
More preferably, the connected mode of ground wire Connection Element and this mounting panel end is for being spirally connected.
More preferably, three-phase Connection Element, zero line Connection Element, ground wire Connection Element are copper bar.
Another object of the present invention is to provide a kind of low-voltage cable junction box, and this low-voltage cable junction box, in separating brake or making process, is ensured according to first earthing line, zero line then three-phase firewire by this body structure of equipment; Otherwise, be three-phase firewire, the zero line then ground wire that first breaks during open circuit, reduce the possibility of electric leakage as far as possible, realize the maximum protection to people and equipment with this.
In order to reduce the possibility of touch, this low-voltage cable junction box is on the basis of above-mentioned arbitrary structure, leading-in bracket is designed to comprise inlet wire lid and inlet wire base by inventor, inlet wire lid and inlet wire base engagement, inlet wire lid is a whole installation, and three-phase firewire inlet wire element, zero line inlet wire element and ground wire inlet wire element successively stepped being distributed on inlet wire base are closed by inlet wire lid.
More preferably, the end that inlet wire lid and inlet wire base are flexibly connected is arranged on the one end near three-phase firewire inlet wire element, inlet wire lid is flexibly connected by pin-and-hole with inlet wire base, like this in installation or maintenance process, when inlet wire lid is opened gradually, ground wire inlet wire element, zero line inlet wire element and three-phase firewire inlet wire element represent successively.
More preferably, leading-in bracket comprises further an inlet wire lid locking bolt and an inlet wire base locking bolt, inlet wire lid locking bolt and inlet wire base locking bolt are separately positioned on the end near ground wire inlet wire element in inlet wire lid and inlet wire base, prevent the inlet wire lid opened arbitrarily on leading-in bracket.
More preferably, leading-in bracket comprises further a leading-in bracket guide pile, leading-in bracket guide pile is arranged on an end of the close three-phase inlet wire element of inlet wire base, when inlet wire lid is opened, leading-in bracket guide pile, to inlet wire lid location, prevents inlet wire lid from rotating, affects wiring or maintenance process.
More preferably, the inlet wire lid of leading-in bracket and inlet wire base adopt insulating material to make, and avoid the danger that leading-in bracket is charged like this.
Preferably, three-phase firewire inlet wire element is divided into first-phase live wire inlet wire element, second-phase live wire inlet wire element and third phase live wire inlet wire element, each phase firewire inlet wire element comprises each phase firewire lead-in line joint and each phase firewire inlet wire connector further, and each phase firewire lead-in line joint connects with each corresponding phase firewire inlet wire connector.
More preferably, zero line inlet wire element comprises zero line lead-in line joint and zero line inlet wire connector further, and zero line lead-in line joint is connected with zero line inlet wire connector.
More preferably, ground wire inlet wire element comprises ground wire lead-in line joint and ground wire inlet wire connector further, and ground wire lead-in line joint is connected with ground wire inlet wire connector.
More preferably, first-phase live wire lead-in line joint, second-phase live wire lead-in line joint, third phase live wire lead-in line joint, zero line lead-in line joint and ground wire lead-in line joint are stepped to be successively distributed on inlet wire base, each phase firewire inlet wire connector in three-phase firewire inlet wire element is electrically connected by pluggable mode with between three-phase Connection Element, zero line inlet wire connector is electrically connected by pluggable mode with zero line Connection Element, and ground wire inlet wire connector is electrically connected by overlapping mode with ground wire Connection Element.
More preferably, first-phase live wire lead-in line joint, second-phase live wire lead-in line joint, third phase live wire lead-in line joint, zero line lead-in line joint and ground wire lead-in line joint are in the position of inlet wire base successively from high to low.
Preferably, also for ease of the possibility reducing and touch, wire-outlet rack is designed to comprise an outlet lid and an outlet base by inventor, outlet lid and outlet base engagement, outlet lid is a whole installation, three-phase firewire goes out kind of thread elements, zero line goes out kind of thread elements and ground wire goes out kind of thread elements and is arranged on outlet base, and zero line goes out kind of thread elements and ground wire goes out the same end that kind of thread elements is disposed side by side on outlet base.
More preferably, outlet lid is flexibly connected with outlet base the end that end is arranged on close ground wire outlet element, outlet lid is flexibly connected by pin-and-hole with outlet base, like this in installation or maintenance process, when outlet lid is opened gradually, three-phase firewire goes out kind of thread elements, zero line goes out kind of thread elements and ground wire goes out kind of thread elements and represents successively, therefore low-voltage cable junction box is in separating brake or making process, ensures according to first earthing line, zero line then three-phase firewire by outlet lid with being flexibly connected of outlet base; Otherwise, be three-phase firewire, the zero line then ground wire that first breaks during open circuit, thus ensure the maximum protection to human body and equipment.
More preferably, the outlet lid of wire-outlet rack and outlet base adopt insulating material to make, and avoid the danger that wire-outlet rack is charged.
Preferably, three-phase firewire goes out kind of thread elements and is divided into that first-phase live wire goes out kind of thread elements, second-phase live wire goes out kind of thread elements and third phase live wire goes out kind of thread elements, each phase firewire goes out kind of thread elements and comprises each phase firewire outlet joint and each phase firewire further and go out wire connections, and each phase firewire outlet joint and corresponding live wire go out wire connections and connect.
More preferably, zero line goes out kind of thread elements and comprises zero line outlet joint further and zero line goes out wire connections, and zero line outlet joint and zero line go out wire connections and be connected.
More preferably, ground wire goes out kind of thread elements and comprises ground wire outlet joint further and ground wire goes out wire connections, and ground wire outlet joint and ground wire go out wire connections and be connected.
More preferably, first-phase live wire outlet joint, second-phase live wire outlet joint and third phase live wire outlet joint are stepped to be successively distributed on outlet base, zero line outlet joint and ground wire outlet joint are disposed side by side on outlet base one end, three-phase firewire each phase firewire gone out in kind of thread elements is gone out between wire connections with three-phase Connection Element and is electrically connected by pluggable mode, zero line is gone out wire connections and is electrically connected by pluggable mode with zero line Connection Element, and ground wire is gone out wire connections and is electrically connected by overlapping mode with ground wire Connection Element.
More preferably, first-phase live wire outlet joint, second-phase live wire outlet joint, third phase live wire outlet joint distribute from high to low successively on outlet base.
More preferably, zero line outlet joint and the position height of ground wire outlet joint on wire-outlet rack are lower than the position height of third phase live wire outlet joint on wire-outlet rack.
Preferably, the non-one_to_one corresponding in position of each joint in each joint and outgoing line unit in wire inlet unit.
More preferably, in wire inlet unit, in each joint and outgoing line unit, stagger in the position of each joint.
More selection of land, the orthographic projection of three-phase firewire lead-in line joint is corresponding to one end of mounting panel, and the orthographic projection of zero line lead-in line joint, ground wire lead-in line joint, three-phase firewire outlet joint, zero line outlet joint and ground wire outlet joint is at the other end of mounting panel.
Another object of the present invention is to provide a kind of low-voltage cable junction box, in order to improve fail safe further in this low-voltage cable junction box, guarantee circuit safety runs, and each outgoing line unit comprises three fuses further, and each fuse sets out inside the outlet lid of coil holder.
Preferably, each fuse each going out kind of thread elements with three-phase firewire corresponding goes out kind of thread elements mutually and is flexibly connected, and fuse contact knife position forms arc control device from wire-outlet rack removal material; When outlet lid and outlet base close, the corresponding and three-phase firewire of each fuse go out kind of thread elements each go out kind of thread elements mutually and be connected, whole circuit is channel status; When opening outlet lid, when outlet lid and outlet base depart from or when circuit occurs exception, the corresponding and three-phase firewire of each fuse go out kind of thread elements each go out kind of thread elements mutually and disconnect, whole circuit is off-state.
More preferably, the two ends of each fuse are corresponding to go out in kind of thread elements each wire connections that goes out going out kind of thread elements mutually with three-phase firewire and is flexibly connected.
More preferably, a corresponding observation window on each fuse, observation window is arranged between fuse and outlet lid, is observed the working condition of corresponding fuse by observation window.
Preferably, each wire connections that goes out going out kind of thread elements mutually comprises an outlet connection assist and outlet conversion connector further, each phase outlet connection assist connects with each corresponding phase outlet joint, and each phase outlet conversion connector is connected by pluggable mode with corresponding three-phase Connection Element.
As a kind of preferred embodiment, the two ends of each fuse are corresponding, and and connector is changed in each outlet going out in kind of thread elements wire connections mutually and outlet connection assist is flexibly connected.
Preferably, in order to prevent electric shock accidents, protection personal safety, linkage unit comprises at least four insulating protective covers further, and in three-phase Connection Element, each be connected element and zero line Connection Element are in corresponding insulating protective cover respectively.
More preferably, insulating protective cover is lattice-shaped envelope structure, and each insulating protective cover is arranged on a mounting board, and in three-phase Connection Element, to be separately positioned on corresponding insulating protective cover inner for each be connected element and zero line Connection Element.
Preferably, low-voltage cable junction box comprises a housing further, and wire inlet unit, outgoing line unit and linkage unit are detachably arranged in housing.
Preferably, the integration of the wire inlet unit in low-voltage cable junction box, outgoing line unit and linkage unit is formed, and relies on the wire inlet unit on linkage unit and outgoing line unit can realize the object of voltage cables feeder pillar low pressure shunting.
Compared with prior art, a kind of low-voltage cable junction box provided by the invention, except adopting Three-phase five-wire design, can connect three-phase and four-line or Three-phase five-wire, applicability improves, ground wire grounded, and the advantage that security performance improves also possesses following advantage:
1, each three-phase firewire, zero line and ground wire in this low-voltage cable junction box are installed in aggregates, wire inlet unit and outgoing line unit are arranged on integralization structure on linkage unit can make feeder pillar interior circuit construction part produce as standard component, mate existing various casing or simple refit can use, can be greatly improved the trouble waters that existing product specification and installation requirement differ, and makes this kind equipment applicability better;
2, wire inlet unit, outgoing line unit and linkage unit are rational in infrastructure, linkage unit is arranged at the below of outgoing line unit and wire inlet unit, the mounting panel cross section of linkage unit is the step arrangement that stairstepping adapts to wire inlet unit and outgoing line unit simultaneously, reduces the volume of whole equipment;
3, linkage unit be arranged on staged arrangement space in, particularly the zero line connector of zero line be arranged on three-phase firewire go out kind of thread elements staged arrangement produce space in, utilize space in equipment to a greater extent thus reduce small product size;
4, in separating brake or making process, ensured according to first earthing line, zero line then three-phase firewire by this body structure of equipment; Otherwise, be three-phase firewire, the zero line then ground wire that first breaks during open circuit, improve the safe controllability of equipment further, avoid the danger of misoperation to occur, realize the maximum protection to people and equipment with this;
5, three-phase firewire, zero line and the ground wire arrangement overall appearance in wire inlet unit and outgoing line unit, the line inspection or replacing is facilitated;
6, this outgoing line unit is independent separately, is independent of each other, when an outgoing line unit breaks down, does not affect the normal work of other outgoing line units;
7, in each outgoing line unit, be provided with multiple fuse, ensure that circuit safety runs, improve circuit safety performance further;
8, multiple low-voltage cable junction box shares an inlet wire cable by increasing a wire inlet unit, makes configuration more succinctly distinct.
In sum, low-voltage cable junction box provided by the invention, security performance improves; do not affecting under the prerequisite that low-voltage cable junction box normally uses; reduce low-voltage cable junction box floor space, at utmost proterctive equipment and personal safety, therefore its application prospect is very wide.
Accompanying drawing explanation
Fig. 1 is the installation diagram of a kind of preferred implementation of low-voltage cable junction box provided by the invention;
Fig. 2 is the stereogram of a kind of preferred implementation of low-voltage cable junction box provided by the invention;
Fig. 3 is a kind of preferred implementation stereogram of wire inlet unit in low-voltage cable junction box provided by the invention;
Fig. 4 is a kind of preferred implementation explosive view of wire inlet unit in low-voltage cable junction box provided by the invention;
Fig. 5 is a kind of preferred implementation stereogram of outgoing line unit in low-voltage cable junction box provided by the invention;
Fig. 6 is a kind of preferred implementation explosive view of outgoing line unit in low-voltage cable junction box provided by the invention;
Fig. 7 is a kind of preferred implementation stereogram of linkage unit in low-voltage cable junction box provided by the invention;
Fig. 8 is a kind of preferred implementation explosive view of linkage unit in low-voltage cable junction box provided by the invention;
Fig. 9 is the distribution schematic diagram of each joint on linkage unit in wire inlet unit and outgoing line unit in low-voltage cable junction box provided by the invention;
Figure 10 is the another kind of preferred implementation schematic diagram of low-voltage cable junction box provided by the invention;
Figure 11 is multiple low-voltage cable junction box connection diagram provided by the invention.
Embodiment
Do to illustrate in detail, intactly further to the present invention below in conjunction with execution mode and accompanying drawing.
Fig. 1 to Fig. 9 is a kind of preferred implementation of low-voltage cable junction box provided by the invention.As depicted in figs. 1 and 2, this low-voltage cable junction box adopts Three-phase five-wire design, be applicable to the use of three-phase four-wire system and three-phase five-wire mode, it comprises in a wire inlet unit 10, multiple outgoing line unit 20(figure and only shows an outgoing line unit 20) and a linkage unit 30, wire inlet unit 10 and outgoing line unit 20 are separately electrically connected with linkage unit 30, independent separately between outgoing line unit 20, be independent of each other.Wire inlet unit 10 and outgoing line unit 20 are through linkage unit 30 structure in aggregates, and standardized designs, can make feeder pillar interior circuit construction part produce as standard component, mate existing various casing or simple refit can use.
Cable branch box comprises a housing 40 further, and wire inlet unit 10, outgoing line unit 20 and linkage unit 30 are detachably arranged in housing 40.
For utilizing the device space, linkage unit 30 is positioned at the below of outgoing line unit 20 and wire inlet unit 10.Outgoing line unit 20 and in column the setting up on linkage unit 30 of wire inlet unit 10.Wire inlet unit 10, outgoing line unit 20 are all vertical with linkage unit 30 to be arranged.Wire inlet unit 10 and outgoing line unit 20 be arranged in parallel, and as one preferably execution mode, multiple outgoing line unit 20 sets up the homonymy with wire inlet unit 10 separately.Outgoing line unit 20 can increase according to actual needs, is preferably 3 ~ 5 groups of outgoing line units, and now this low-voltage cable junction box is to go out into three or most as many as one enters five and goes out.Now, wire inlet unit 10, outgoing line unit 20 and linkage unit 30 one-tenth one network structure.
Fig. 3 is a kind of preferred implementation stereogram of wire inlet unit in low-voltage cable junction box provided by the invention; Fig. 4 is a kind of preferred implementation explosive view of wire inlet unit in low-voltage cable junction box provided by the invention.As shown in Figure 3 to Figure 4, this wire inlet unit 10 comprises three-phase firewire inlet wire element 11, zero line inlet wire element 12, ground wire inlet wire element 13 and leading-in bracket 14, and three-phase firewire inlet wire element 11, zero line inlet wire element 12 and ground wire inlet wire element 13 points are located on leading-in bracket 14 in aggregates.The three-phase firewire inlet wire element 11 of wire inlet unit 10, zero line inlet wire element 12 and ground wire inlet wire element 13 are flexibly connected with linkage unit 30.
In order to reduce the possibility arbitrarily touching each element in wire inlet unit 10, leading-in bracket 14 comprises inlet wire lid 141 and an inlet wire base 142 further, inlet wire lid 141 coordinates with inlet wire base 142, inlet wire lid 141 is a whole installation, and three-phase firewire inlet wire element 11, zero line inlet wire element 12 and ground wire inlet wire element 13 successively stepped being distributed on inlet wire base 142 are closed by inlet wire lid 141.Inlet wire lid 141 and the inlet wire base 142 of leading-in bracket 14 adopt insulating material to make, and avoid when whole low-voltage cable junction box channel status like this, the danger that leading-in bracket 14 is charged, not only proterctive equipment but also protect personal safety.
The end that inlet wire lid 141 and inlet wire base 142 are flexibly connected is arranged on the one end near three-phase firewire inlet wire element 11, the end that inlet wire lid 141 and inlet wire base 142 are flexibly connected is flexibly connected by pin-and-hole, like this in installation or maintenance process, when inlet wire lid 141 is opened gradually, ground wire inlet wire element 13, zero line inlet wire element 12 and three-phase firewire inlet wire element 11 represent successively, improve installation or maintenance process fail safe.
Further, leading-in bracket 14 comprises further inlet wire lid locking bolt 1411 and an inlet wire base locking bolt 1421, inlet wire lid locking bolt 1411 and inlet wire base locking bolt 1421 are separately positioned on the end near ground wire inlet wire element 13 in inlet wire lid 141 and inlet wire base 142, prevent the inlet wire lid 141 opened arbitrarily on leading-in bracket 14.
Further, leading-in bracket 14 comprises further a leading-in bracket guide pile 143, leading-in bracket guide pile 143 is arranged on an end of the close three-phase inlet wire element 11 of inlet wire base 142, like this when inlet wire lid 142 is opened, leading-in bracket guide pile 143 pairs of inlet wire lids 142 are located, prevent inlet wire lid 142 from rotating, affect wiring or maintenance process.
Three-phase firewire inlet wire element 11 is divided into first-phase live wire inlet wire element 111, second-phase live wire inlet wire element 112 and third phase live wire inlet wire element 113, each phase firewire inlet wire element (111,112,113) comprises each phase firewire lead-in line joint (1111,1121,1131) and each phase firewire inlet wire connector (1112,1122,1132) further, and each phase firewire lead-in line joint (1111,1121,1131) connects with each corresponding phase firewire inlet wire connector (1112,1122,1132).Zero line inlet wire element 12 comprises zero line lead-in line joint 121 and zero line inlet wire connector 122 further, and zero line lead-in line joint 121 is connected with zero line inlet wire connector 122.Ground wire inlet wire element 13 comprises ground wire lead-in line joint 131 and ground wire inlet wire connector 132 further, and ground wire lead-in line joint 131 is connected with ground wire inlet wire connector 132.
First-phase live wire lead-in line joint 1111, second-phase live wire lead-in line joint 1121, third phase live wire lead-in line joint 1131, zero line lead-in line joint 121 and ground wire lead-in line joint 131 are stepped to be successively distributed on inlet wire base 142, each phase firewire inlet wire connector (1112,1122,1132) in three-phase firewire inlet wire element 11 is electrically connected by pluggable mode with linkage unit 30, zero line inlet wire connector 12 is electrically connected by pluggable mode with linkage unit 30, and ground wire inlet wire connector 13 is electrically connected by overlapping mode with linkage unit 30.
It should be noted that first-phase live wire lead-in line joint 1111, second-phase live wire lead-in line joint 1121, third phase live wire lead-in line joint 1131, zero line lead-in line joint 121 and ground wire lead-in line joint 131 in the position of inlet wire base 142 successively from high to low.
Fig. 5 is a kind of preferred implementation stereogram of outgoing line unit in low-voltage cable junction box provided by the invention; Fig. 6 is a kind of preferred implementation explosive view of outgoing line unit in low-voltage cable junction box provided by the invention.As shown in Figure 2, Figure 5 and Figure 6, this outgoing line unit 20 is connected by linkage unit 30 with this wire inlet unit 10, this outgoing line unit 20 comprises that three-phase firewire goes out kind of thread elements 21, zero line goes out kind of thread elements 22, ground wire goes out kind of thread elements 23 and wire-outlet rack 24, and three-phase firewire goes out kind of thread elements 21, zero line goes out kind of thread elements 22 and ground wire goes out kind of thread elements 23 and is divided on wire-outlet rack 24 in aggregates.In outgoing line unit 20, each element is separately flexibly connected with linkage unit 30.
Also for ease of the possibility reducing and arbitrarily touch each element in outgoing line unit 20, wire-outlet rack 24 comprises outlet lid 241 and an outlet base 242 further, outlet lid 241 coordinates with outlet base 242, outlet lid 241 is flexibly connected with outlet base 242, outlet lid 241 is a whole installation, three-phase firewire goes out kind of thread elements 21, zero line goes out kind of thread elements 22 and ground wire is gone out kind of thread elements 23 and is all arranged on outlet base 242 and closed by outlet lid 241, and zero line goes out kind of thread elements 22 and ground wire goes out the same end that kind of thread elements 23 is disposed side by side on outlet base 242.Outlet lid 241 and the outlet base 242 of wire-outlet rack 24 adopt insulating material to make, and avoid wire-outlet rack 24 charged danger due to whole low-voltage cable junction box energising.
It should be noted that, outlet lid 241 is flexibly connected with outlet base 242 the end that end is arranged on close ground wire outlet element 23, outlet lid 241 is flexibly connected by pin-and-hole with the end that is flexibly connected of outlet base 242, like this in installation or maintenance process, when outlet lid 241 is opened gradually, three-phase firewire goes out kind of thread elements 21, zero line goes out kind of thread elements 22 and ground wire goes out kind of thread elements 23 and represents successively; Therefore low-voltage cable junction box is in separating brake or making process, ensures according to first earthing line, zero line then three-phase firewire by outlet lid 241 with being flexibly connected of outlet base 242; Otherwise, be three-phase firewire, the zero line then ground wire that first breaks during open circuit, thus ensure the maximum protection to human body and equipment.
Three-phase firewire goes out kind of thread elements 21 and is divided into that first-phase live wire goes out kind of thread elements 211, second-phase live wire goes out kind of thread elements 212 and third phase live wire goes out kind of thread elements 213, each phase firewire goes out kind of thread elements (211,212,213) and comprises each phase firewire outlet joint (2111,2121,2131) further and each phase firewire goes out wire connections (2112,2122,2132), and each phase firewire outlet joint (2111,2121,2131) and corresponding live wire go out wire connections (2112,2122,2132) and connect.Zero line goes out kind of thread elements 22 and comprises zero line outlet joint 221 further and zero line goes out wire connections 222, and zero line outlet joint 221 and zero line go out wire connections 222 and be connected.Ground wire goes out kind of thread elements 23 and comprises ground wire outlet joint 231 further and ground wire goes out wire connections 232, and ground wire outlet joint 231 and ground wire go out wire connections 232 and be connected.
First-phase live wire outlet joint 2111, second-phase live wire outlet joint 2121, third phase live wire outlet joint 2131 is stepped to be successively distributed on outlet base 242, zero line outlet connect 221 and ground wire outlet joint 231 be disposed side by side on an end of outlet base 242, each phase firewire that three-phase firewire goes out in kind of thread elements 21 goes out wire connections (211, 212, 213) be electrically connected by pluggable mode with linkage unit 30, zero line is gone out wire connections 222 and is electrically connected by pluggable mode with linkage unit 30, ground wire is gone out wire connections 232 and is electrically connected by overlapping mode with linkage unit 30.Noticeable thing, first-phase live wire outlet joint 2111, second-phase live wire outlet joint 2121, third phase live wire outlet joint 2131 distribute from high to low successively on outlet base 242, and the position height of zero line outlet joint 221 and ground wire outlet joint 231 is lower than the height of third phase live wire outlet joint 2131.
In order to prevent zero line outlet joint 221 and ground wire outlet joint 231 from connecting, causing ground wire electrification, between zero line outlet joint 221 and ground wire outlet joint 231, being provided with an insulation board.
Fig. 7 is a kind of preferred implementation stereogram of linkage unit in low-voltage cable junction box provided by the invention; Fig. 8 is a kind of preferred implementation explosive view of linkage unit in low-voltage cable junction box provided by the invention.As shown in Fig. 7 to Fig. 8, this linkage unit 30 comprises three-phase Connection Element 31, zero line Connection Element 32, ground wire Connection Element 33 and mounting panel 34, and three-phase Connection Element 31, zero line Connection Element 32 and ground wire Connection Element 33 are installed in parallel on mounting panel 34 successively.
Three-phase firewire inlet wire element 11 and go out that kind of thread elements 21 is connected by three-phase Connection Element 31, zero line inlet wire element 12 and go out kind of thread elements 22 and connected by zero line Connection Element 32 and ground wire inlet wire element 13 and go out kind of thread elements 23 and connected by ground wire Connection Element 33.
Three-phase Connection Element 31 is divided into first-phase Connection Element 311, second-phase Connection Element 312 and third phase Connection Element 313.Three-phase firewire inlet wire element 11 and go out the first-phase Connection Element 311 of kind of thread elements 21 and three-phase Connection Element 31, second-phase Connection Element 312 and third phase Connection Element 313 and be flexibly connected, zero line inlet wire element 12 and go out kind of thread elements 22 and be flexibly connected with zero line Connection Element 32, ground wire inlet wire element 13 with go out kind of thread elements 23 and be flexibly connected with ground wire Connection Element 33.
As one preferably execution mode, the first-phase Connection Element 311 that in three-phase firewire inlet wire element 11, each phase firewire inlet wire connector (1112,1122,1132) is corresponding with three-phase Connection Element 31, to be electrically connected by pluggable mode between second-phase Connection Element 312 and third phase Connection Element 313, in zero line inlet wire element 12, zero line inlet wire connector 122 is electrically connected by pluggable mode with zero line Connection Element 32, and in ground wire inlet wire element 13, ground wire inlet wire connector 132 is electrically connected by overlapping mode with ground wire Connection Element 33; Three-phase firewire is gone out each phase firewire in kind of thread elements 21 and goes out wire connections (2112,2122,2132) the first-phase Connection Element 311 corresponding with three-phase Connection Element 31, is electrically connected by pluggable mode between second-phase Connection Element 312 and third phase Connection Element 313, zero line is gone out zero line in kind of thread elements 22 and goes out wire connections 222 and be electrically connected by pluggable mode with zero line Connection Element 32, and ground wire is gone out ground wire in kind of thread elements 13 and goes out wire connections 132 and be electrically connected by overlapping mode with ground wire Connection Element 33.
In order to coordinate the installation site of each element in wire inlet unit 10 and outgoing line unit 20, the cross section of the mounting panel 34 of linkage unit 30 is stairstepping.As a kind of preferred implementation, mounting panel 34 is formed by bending integration, mounting panel 34 comprises the first mounting panel 341, second mounting panel 342 and the 3rd mounting panel 343 further, first mounting panel 341 is connected by the 3rd mounting panel 343 with the second mounting panel 342, and the height of the first mounting panel 341 is higher than the second mounting panel 342.
Three-phase Connection Element 31 is arranged on the first mounting panel 341, and the height that each element that is connected (311,312,313) is arranged on the first mounting panel 341 is consistent.Zero line Connection Element 32 and ground wire Connection Element 33 are arranged on the second mounting panel 342.Zero line Connection Element 32 is the difference in height between the first mounting panel 341 and the second mounting panel 342 with the difference in height of each element that is connected (311,312,313) in three-phase Connection Element.
In order to the space that Appropriate application three-phase firewire goes out kind of thread elements 21, zero line goes out kind of thread elements 22 staged distribution generation, reduce floor space, zero line Connection Element 32 is in the below that three-phase firewire goes out kind of thread elements 21, and ground wire Connection Element 33 is connected with the second mounting panel 342 end of mounting panel 34.
Second mounting panel 342 end is bent to form a non-horizontal surface, and the non-horizontal surface that ground wire Connection Element 33 is bent to form with the second mounting panel 342 end is connected.The cross section of ground wire Connection Element 33 is L-shaped, and the non-horizontal surface that a side and second mounting panel 342 of ground wire Connection Element 33 are bent to form is connected.Second mounting panel 342 end is preferably bent to form a vertical plane, and the vertical plane that a side and second mounting panel 342 end of ground wire Connection Element 33 are bent to form is connected.The connected mode of ground wire Connection Element 33 and the second mounting panel 342 end is preferably spirally connected.
It should be noted that, mounting panel 34 is made for insulating material, and such ground wire Connection Element 33 is connected with the end of the second mounting panel 342 of mounting panel 34, and ground wire Connection Element 33 keeps ground connection, this ensure that ground wire grounded, increase the fail safe of whole low-voltage cable junction box.
Even more noteworthy, three-phase firewire Connection Element 31, zero line Connection Element 32, ground wire Connection Element 33 are copper bar.
In order to improve fail safe, each outgoing line unit 20 comprises three fuses 25 further, each fuse 25 sets out inside the outlet lid 241 of coil holder 24, corresponding and the three-phase firewire of each fuse 25 go out kind of thread elements 21 each go out kind of thread elements (211,212,213) mutually and be flexibly connected, fuse contact knife position is removed material from outlet base 242 and is formed arc control device; When outlet lid 241 closes with outlet base 242, the corresponding and three-phase firewire of each fuse 25 go out kind of thread elements 21 each go out kind of thread elements (211,212,213) mutually and be connected, whole circuit is channel status; When opening outlet lid 241, when outlet lid 241 and outlet base 242 depart from, the corresponding and three-phase firewire of each fuse 25 go out kind of thread elements 21 each go out kind of thread elements (211,212,213) mutually and disconnect, whole circuit is off-state.A corresponding observation window 251 on each fuse 25, observation window 251 is arranged between fuse 25 and outlet lid 241, is observed the working condition of corresponding fuse 25 by observation window 251.
Corresponding and the three-phase firewire in the two ends of each fuse 25 to go out in kind of thread elements 21 each wire connections (2112,2122,2132) that goes out going out kind of thread elements (211,212,213) mutually and is flexibly connected.
Each wire connections (2112,2122,2132) that goes out going out kind of thread elements (211,212,213) mutually comprises an outlet connection assist (21121,21221,21321) and outlet conversion connector (21122,21222,21322) further, each phase outlet connection assist (21121,21221,21321) connects with corresponding each phase outlet joint (2111,2121,2131), and each phase outlet conversion connector (21122,21222,21322) is connected by pluggable mode with corresponding three-phase Connection Element 31.
The two ends of each fuse 25 corresponding and each go out the outlet going out wire connections (2112,2122,2132) in kind of thread elements (211,212,213) mutually and change connector (21122,21222,21322) and outlet connection assist (21121,21221,21321) is flexibly connected.
In order to prevent electric shock accidents; protection personal safety; linkage unit 30 comprises at least four insulating protective covers 35 further, and in three-phase Connection Element 31, each element that is connected (311,312,313) and zero line Connection Element 32 are in corresponding insulating protective cover 35 respectively.
Insulating protective cover 35 is in lattice-shaped envelope structure, and each insulating protective cover 35 is arranged on mounting panel 34, and in three-phase Connection Element 31, each element that is connected (311,312,313) and zero line Connection Element 32 are in corresponding insulating protective cover 35 inside respectively.
Fig. 9 is the distribution schematic diagram of each joint on linkage unit in wire inlet unit and outgoing line unit in low-voltage cable junction box provided by the invention.As shown in Figure 9, joint (2111,2121,2131) the non-one_to_one corresponding in lengthwise position that the joint (1111,1121,1131) in this low-voltage cable junction box in wire inlet unit 10 is corresponding with outgoing line unit.(2111,2121,2131) corresponding with outgoing line unit as the joint (1111,1121,1131) in a kind of preferred implementation wire inlet unit 10 stagger in lengthwise position.In addition, in order to utilize equipment space, reduce equipment volume, the orthographic projection of three-phase firewire lead-in line joint (1111,1121,1131) is on the first mounting panel 341 of mounting panel 34, and the orthographic projection of zero line lead-in line joint 121, ground wire lead-in line joint 131, three-phase firewire outlet joint (2111,2121,2131), zero line outlet joint 221 and ground wire outlet joint 231 is on the 3rd mounting panel 343 and/or the second mounting panel 343 of mounting panel.The first mounting panel 341 that each element that is connected (311,312,313) of three-phase Connection Element 31 is distributed in mounting panel is in three-phase lead-in line joint (1111,1121,1131) below; Zero line Connection Element 32 is arranged on the second mounting panel 342, three-phase firewire outlet joint (2111,2121,2131) staged arrangement produce gap in, be in first-phase live wire lift one's head 2111 below; Ground wire Connection Element 33 is on the side of the second mounting panel 342, and the non-horizontal surface be bent to form with the side of the second mounting panel 342 is connected.
Figure 10 is the another kind of preferred implementation schematic diagram of low-voltage cable junction box provided by the invention.Figure 11 is multiple low-voltage cable junction box connection diagram provided by the invention.As shown in Figure 10 and Figure 11, a lambda line cable can be shared for realizing multiple low-voltage cable junction box, reduce each low-voltage cable junction box and repeat wiring, avoid circuit in cable box numerous and diverse, make configuration more succinctly distinct, inventor, on arbitrary architecture basics of above-mentioned low-voltage cable box, increases by a wire inlet unit 10 in each low-voltage cable junction box, realize multiple low-voltage cable junction box to be like this cascaded, multiple low-voltage cable junction box can share a lambda line cable.
As shown in Figure 10 and Figure 11, multiple low-voltage cable junction box is cascaded, each low-voltage cable junction box comprises two wire inlet units 10, at least one outgoing line unit 20 and is connected the linkage unit 30 of wire inlet unit 10 and outgoing line unit 20, two wire inlet unit 10 side by side parallel are arranged, outgoing line unit 20 and two wire inlet unit 10 side by side parallel, outgoing line unit 20 is arranged on the homonymy of wire inlet unit 10, and wire inlet unit 10, outgoing line unit 20 are all vertical with linkage unit 30 to be arranged.Cable enters from a wire inlet unit 10 of each low-voltage cable junction box, then goes out from another wire inlet unit 10 and be connected with another low-voltage cable junction box wire inlet unit 10, then by that analogy.In each low-voltage cable junction box, be parallel relationship between two wire inlet units 10 and outgoing line unit 20, keep wire inlet unit 10 consistent with the voltage between outgoing line unit 20 like this, thus the voltage in multiple low voltage voltage feeder pillar is consistent.
Finally be necessary described herein: above embodiment is only for being described in more detail technical scheme of the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (10)
1. a low-voltage cable junction box, it is characterized in that, comprise: at least one wire inlet unit, multiple outgoing line unit and a linkage unit, wire inlet unit comprises three-phase firewire inlet wire element, zero line inlet wire element, ground wire inlet wire element and leading-in bracket, wherein each inlet wire element is divided on leading-in bracket in aggregates, outgoing line unit comprises that three-phase firewire goes out kind of thread elements, zero line goes out kind of thread elements, ground wire goes out kind of thread elements and wire-outlet rack, wherein respectively goes out kind of thread elements and is divided on wire-outlet rack in aggregates; Each element in wire inlet unit and outgoing line unit is separately electrically connected with linkage unit.
2. low-voltage cable junction box as claimed in claim 1, is characterized in that: wire inlet unit and outgoing line unit be arranged in parallel.
3. low-voltage cable junction box as claimed in claim 1, is characterized in that: wire inlet unit, outgoing line unit are all vertical with linkage unit to be arranged.
4. low-voltage cable junction box as claimed in claim 1, is characterized in that: wire inlet unit, outgoing line unit become a network structure with linkage unit.
5. the low-voltage cable junction box as described in as arbitrary in claim 1, is characterized in that: each low-voltage cable junction box comprises two wire inlet units further, and two wire inlet unit side by side parallel are arranged, and two wire inlet units are connected with linkage unit with outgoing line unit.
6. low-voltage cable junction box as claimed in claim 5, it is characterized in that: multiple low-voltage cable junction box is cascaded a shared cable, cable enters from a wire inlet unit of each low-voltage cable junction box, then goes out from another wire inlet unit and be connected with another low-voltage cable junction box wire inlet unit.
7. the low-voltage cable junction box as described in as arbitrary in claim 1-6, is characterized in that: the wire inlet unit in low-voltage cable junction box and outgoing line unit link into an integrated entity through linkage unit.
8. low-voltage cable junction box as claimed in claim 1, is characterized in that: linkage unit is positioned at the below of outgoing line unit and wire inlet unit.
9. low-voltage cable junction box as claimed in claim 1, is characterized in that: outgoing line unit and in column the setting up on linkage unit of wire inlet unit.
10. low-voltage cable junction box as claimed in claim 1, is characterized in that: multiple outgoing line unit sets up the homonymy with wire inlet unit separately.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148288.7A CN104979792B (en) | 2014-04-14 | 2014-04-14 | A kind of low-voltage cable junction box |
| CN201510885859.XA CN105811348A (en) | 2014-04-14 | 2014-04-14 | Remote controllable low-voltage cable branch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148288.7A CN104979792B (en) | 2014-04-14 | 2014-04-14 | A kind of low-voltage cable junction box |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510885859.XA Division CN105811348A (en) | 2014-04-14 | 2014-04-14 | Remote controllable low-voltage cable branch box |
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| Publication Number | Publication Date |
|---|---|
| CN104979792A true CN104979792A (en) | 2015-10-14 |
| CN104979792B CN104979792B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510885859.XA Pending CN105811348A (en) | 2014-04-14 | 2014-04-14 | Remote controllable low-voltage cable branch box |
| CN201410148288.7A Active CN104979792B (en) | 2014-04-14 | 2014-04-14 | A kind of low-voltage cable junction box |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510885859.XA Pending CN105811348A (en) | 2014-04-14 | 2014-04-14 | Remote controllable low-voltage cable branch box |
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| CN105914588A (en) * | 2016-06-03 | 2016-08-31 | 湖南昊晟机电设备有限公司 | Multi-circuit-breaker power distribution cabinet or power distribution box |
| CN109301739A (en) * | 2018-11-14 | 2019-02-01 | 国网浙江新昌县供电有限公司 | Replacing the insulation and isolation device of the circuit breaker in the low-voltage cable branch box with electricity |
| CN111182722A (en) * | 2020-02-26 | 2020-05-19 | 王致刚 | MCU application circuit board of modularization concatenation |
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| EP1564858A1 (en) * | 2004-02-17 | 2005-08-17 | R. Stahl Schaltgeräte GmbH | Branching box |
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| CN109301739A (en) * | 2018-11-14 | 2019-02-01 | 国网浙江新昌县供电有限公司 | Replacing the insulation and isolation device of the circuit breaker in the low-voltage cable branch box with electricity |
| CN111182722A (en) * | 2020-02-26 | 2020-05-19 | 王致刚 | MCU application circuit board of modularization concatenation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105811348A (en) | 2016-07-27 |
| CN104979792B (en) | 2019-02-26 |
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