CN107564764A - Arc-suppressing load switch - Google Patents
Arc-suppressing load switch Download PDFInfo
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- CN107564764A CN107564764A CN201710812584.6A CN201710812584A CN107564764A CN 107564764 A CN107564764 A CN 107564764A CN 201710812584 A CN201710812584 A CN 201710812584A CN 107564764 A CN107564764 A CN 107564764A
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- load switch
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Abstract
The present invention relates to power equipment technology, specifically discloses a kind of arc-suppressing load switch, including first, second conducting end and the reciprocating conducting rod by driving, and combined floodgate and separating brake are realized in conducting rod motion.Second conducting end includes piston and the second contact；Second contact is located at piston exterior and has gap therebetween；Conducting rod is hollow cavity, is installed on the gap, and piston is contained in its cavity；Second contact can keep electrically connecting with conducting rod in motion process；The cavity of the conducting rod is integrally formed the variable gas held space of product with the piston；First conducting end includes the first contact；The conductive boom end is provided with the air current spray nozzle and aerogenesis element connected with the gas held space.During separating brake, conducting rod, which moves down, makes gas held space diminish generation high pressure draught to extinguish electric arc caused by separating brake；The aerogenesis element of conductive boom end is discharged arc extinguishing gases by arcing simultaneously, extinguishes electric arc.
Description
Technical field
The present invention relates to power equipment technology, relates in particular to one kind and has two kinds of arc extinguishings of compressed-air arc-extinguishing and aerogenesis arc extinguishing concurrently
The arc-suppressing load switch of mode.
Background technology
When using device for switching turn-off current, if circuit voltage lies prostrate higher than 10-20, electric current is higher than 80~100mA, electricity
Electric arc will be produced between the contact of device.Electric arc is that two interpolars produce strong and lasting gas discharge phenomenon, is substantially high temperature
Highly conductive free gas, it not only has very big destruction to contact, and makes the time lengthening of disconnecting circuit.
12kV medium voltage load switchs equipment currently on the market mainly has 5 kinds of modes：Oil immersed type, air pressing type, air-generating,
SF6 (sulfur hexafluoride) gas type, vacuum type.Although vacuum type structure is convenient, such as Chinese Authorization Notice No. CN 101800137B
Patent of invention document discloses this technology, but its cost is very high does not also have isolation fracture；SF6 gas type performance comparisions are superior,
Patent of invention document such as the Chinese A of publication number CN 101425421 discloses this technology, but SF6 gases are non-environmental protection gas
Body, it develops and application is restricted；Traditional air pressing type and air-generating product is influenceed by arc extinction performance, and volume is all more non-
Chang great, miniaturization can not be realized, such as Chinese Y of Granted publication CN 2256584 utility model patent document discloses one kind
Safe air pressing type airload switch.In summary, current on-load switch is mostly almost one kind side more than independent use
Formula carries out arc extinguishing, could not well by related arc extinguishing structure carry out it is ingenious organically combine, overall structure seems that comparison is clumsy；
Therefore the arc extinguishing ability of existing arc-suppressing switch needs to be further improved, and structure also needs further to be optimized.
In addition, the design currently for air pressing type and air-generating structure is all relative coarseness, not for arc extinguishing structure
The design refined with air flow structure, so arc extinction performance is all poor, miniaturization can not be realized, reduces cost.
The content of the invention
The mesh of the present invention, which is to provide, a kind of to be born air pressing type arc extinguishing structure with the arc extinguishing that air-generating arc-extinguishing clever structure is combined
Lotus construction of switch, arc extinction performance is improved, reduces cost.
Second object of the present invention is to provide a kind of arc-suppressing load switch of the striking structure of contact terminal with optimization, carries
The ability that electric current shifts during high drop-out current.
Third object of the present invention is to provide a kind of arc-suppressing load switch of the nozzle arrangements with optimization, Neng Gouyou
Change air velocity distribution, strengthen arc extinguishing ability.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
A kind of arc-suppressing load switch, including first conducting end, the second conducting end and one can be driven reciprocal
The conducting rod of motion, the combined floodgate of first conducting end and the second conducting end is realized by the reciprocating motion of the conducting rod or divided
Lock；
First conducting end includes the first contact, the conducting rod to first conducting end movement and close to when, energy
It is enough to be conductively connected with first contact；
Second conducting end includes a piston and the second contact；Second contact is located at the side of the piston,
And a gap is formed between second contact and the piston；
The conducting rod is a hollow structure with cavity；The conducting rod is installed on the gap, and by described in
Piston is contained in the cavity, and second contact is then contacted in the outer surface of the conducting rod, second contact and fortune
The conducting rod during dynamic remains electrical connection；The piston forms the gas held of a variable-volume with the cavity
Space；
The conducting rod includes the first end towards first conducting end, and second towards second conducting end
End；The first end of wherein described conducting rod is provided with an air current spray nozzle connected with the gas held space and an aerogenesis
Element；
The conducting rod, to be conductively connected with first conducting end, reaches to the direction movement close to first conducting end
To "on" position, now the gas held spatial volume change is big and sucks gas；
The conducting rod is separated to the direction movement away from first conducting end with being led with first conducting end, is reached
Gate-dividing state, the aerogenesis element receive the conducting rod and separate caused arc energy with first contact, and release is gone out
Arc gas are to extinguish electric arc；Simultaneously the gas held space volume-diminished and produce high pressure draught, from the air current spray nozzle
Spray to extinguish electric arc.
In a feasible embodiment of the invention, the air current spray nozzle includes a hollow cavity and a mouth, institute
The top that mouth is located at the air current spray nozzle is stated, for spraying air-flow；The air current spray nozzle is incorporated in the conduction with its bottom
The first end of bar, the cavity is between the top and bottom of the air current spray nozzle.
In a preferred embodiment of the present invention, the aerogenesis element not only may be used in the cavity of air current spray nozzle
The arc extinguishing gases prevented are leaked into environment, and also rush at electric arc using the kinetic energy calmed the anger with certain speed, have
Higher arc extinguishing ability.
In a feasible embodiment of the invention, first conducting end also includes first contact base and one quiet is drawn
Arcing contact, first contact and the quiet striking contact are fixed and are conductively connected in first contact base；It is described quiet to draw
The end of arcing contact is than first contact closer to the conducting rod；The first end of the conducting rod be additionally provided with one with it is described
The dynamic striking contact of quiet striking contacts mates connection, the dynamic striking contact are conductively connected with the conducting rod.
In a feasible embodiment of the invention, the dynamic striking contact includes a dynamic striking contact body and described in
The vertically extending multiple petal-shaped elastic contact blades of dynamic striking contact body；The dynamic striking contact body is electrically connected with the conducting rod
Connect；The petal-shaped contact forms ring-type, can encircle in the outside of the quiet striking contact, make to draw quiet described in separating brake moment
Arcing contact still keeps being conductively connected with the dynamic striking contact, is touched so as to which electric current is transferred into described first from arc contact loop
In the galvanic circle that head and the second contact are formed, electric current transfer ability is improved.
In a feasible embodiment of the invention, the dynamic striking contact is located at the bottom of the cavity of the air current spray nozzle,
And the aerogenesis element is located between the mouth of the air current spray nozzle and the dynamic striking contact.It in this way, can connect aerogenesis element
Most arc energy is received, and caused arc extinguishing gases can obtain initial velocity to greatest extent, improve aerogenesis element using electricity
The efficiency of arc energy, produces arc extinguishing gases faster and more.
In a feasible embodiment of the invention, the aerogenesis element is the aerogenesis ring that a gas exhausted material is made,
The aerogenesis ring set is through the outside of the petal-shaped contact of the dynamic striking contact, effectively fixed aerogenesis element.
In a feasible embodiment of the invention, the dynamic striking contact body is provided with several open-works, the open-work
Position forms Central Symmetry centered on the petal-shaped contact.
In a feasible embodiment of the invention, the air current spray nozzle also includes a throat, and the throat is positioned at described
The lower section of mouth is used to connect the cavity, and the throat is provided with least one air-flow guide groove, and the air-flow for making to be sprayed by mouth produces
Raw spiral effect.Preferably, the air-flow guide groove is circular, continuous scroll or discrete scroll line segment.
In a feasible embodiment of the invention, the cavity inner wall of the air current spray nozzle, in being connected to below the mouth
Position be set as inclined-plane, the inclined-plane is distributed in the mouth both sides in eight words, the axis side of the inclined-plane and the conducting rod
To the angle formed less than or equal to 90 °；Preferably 40-80 °.
In a feasible embodiment of the invention, the piston located at one end of a piston rod, the piston rod it is another
One end is fixed on piston rod base.
In a feasible embodiment of the invention, second contact and/or first contact are one and had inwardly
The sleeve-shaped conductive contact of elastic force, the second contact ring is located at the outside of the piston, and institute is formed between the piston
State gap；Second contact is encircled in the outside of the conducting rod by its inside elastic force, is moving back and forth the conducting rod
During all the time with second contact keep be conductively connected；First contact is by its inside elastic force and constantly to itself
The close conducting rod, which is reached, to be conductively connected, and is had and is grasped the effect that conducting rod forms reliable conductive connection.
In a feasible embodiment of the invention, second contact and first contact are plum blossom contact, a ring
The conductive ring set of the spring touch finger of shape or a claw comprising multiple Longitudinal extendings.
In a feasible embodiment of the invention, one connecting lever of external connection of the conducting rod, the connecting lever drives institute
State conducting rod to move up and down, realize combined floodgate and separating brake.
In a feasible embodiment of the invention, wherein second conducting end also includes an insulating base, described the
Two contact bases are fixed on the insulating base.
In a feasible embodiment of the invention, wherein first conducting end also includes an insulating base, described the
One contact base is fixed on the insulating base.
In a feasible embodiment of the invention, the aerogenesis element or aerogenesis ring are by polytetrafluoroethylene (PTFE) or polytetrafluoroethylene (PTFE)
Mixture is made.
The advantageous effects of the present invention include：
The present invention using cleverly structure, while the conducting rod is served as moving contact also using its hollow cavity relative to
Piston rod move to be formed high pressure draught spray play arc extinguishing effect；And aerogenesis element is located to the first end (moving contact of conducting rod
End), making full use of the high heat effect of high temperature of electric arc makes aerogenesis element aerogenesis, plays the effect of aerogenesis arc extinguishing.In the present invention, it is described
Conducting rod is displaced between first and second conducting end；Conducting rod has longer length in itself, and its whole internal cavity has been in
Full hollow form, therefore can make the variable-volume in gas held space that there is wider threshold range, can be to form more high-voltage high-speed
More arc extinguishing air-flows provide favourable basic condition.Overall structure of the present invention is simple, and compressed-air arc-extinguishing structure and aerogenesis are gone out
The organic dexterous combination of arc structure, cost can also be reduced by not only improving arc extinguishing efficiency, additionally aid the miniaturization for realizing product.
In addition, the present invention also has the air current spray nozzle of hollow cavity structure, and aerogenesis element is placed in the cavity, be placed on
It is close near dynamic striking contact, can farthest utilizes arc energy, improve the ability and utilization ratio of aerogenesis, make production
Raw arc extinguishing gases are together ejected into electric arc root with the air stream of high speed and high pressure, lift arc extinguishing ability.
Furthermore the present invention is also specially improved the cavity and throat of air current spray nozzle, optimizes air velocity distribution performance；
The present invention also further optimizes the fit structure of dynamic striking contact and quiet striking contact, is advantageous to the moment of drop-out current, electricity
Stream can be transferred to from conductive end loops in striking contact loop.
Wherein, first, second contact of the invention is the sleeve-shaped conductive contact with inside elastic force, can form flexible fortune
The galvanic circle of also electrically conductive connection in dynamic.
Brief description of the drawings
Fig. 1 is that the arc-suppressing load switch of first embodiment of the invention is in the sectional view of closing position；
Fig. 2 is that the arc-suppressing load switch of embodiment illustrated in fig. 1 is in the sectional view of open position；
Fig. 3 is the conducting rod of embodiment illustrated in fig. 1 switch and the structural representation of the second conducting end released state；
Fig. 4 is the mplifying structure schematic diagram that the second preferred embodiment of the invention switchs air current spray nozzle and dynamic striking contact；
Fig. 5 A are the diagrammatic cross-section of the dynamic striking contact of the second preferred embodiment switch of the invention.
Fig. 5 B are the vertical view face schematic diagram of the dynamic striking contact of the second preferred embodiment switch of the invention.
Sign flag explanation：
First conducting end 11, the first contact base 112, the first contact 111, the first conducting end insulating base 113, quiet striking are touched
First 114, second conducting end 13, the second contact base 132, the second contact 131, the second conducting end insulating base 133, piston rod 134,
Ring groove 1341, sealing ring 1342, piston rod base 135, connecting lever 14, conducting rod 12, conducting rod first end 121, conducting rod
Two ends 122, conducting rod cavity 123, gas held SPACE V, air current spray nozzle 15, air current spray nozzle cavity 151, mouth 152, throat
153rd, air-flow guide groove 1531, cavity inner wall 1511, inclined-plane 1512, angle 1513, dynamic striking contact 16, dynamic striking contact body
161st, contact 162, open-work 1611, the aerogenesis element 17 of striking contact are moved.
Embodiment
Embodying the exemplary embodiments of feature of present invention and advantage will describe in detail in the following description.It should be understood that this
Invention can have various changes in different embodiments, and it is neither departed from the scope of the present invention, and it is therein explanation and
Accompanying drawing inherently is illustrated as being used, and is not used to the limitation present invention.
Embodiment one
Fig. 1 is that the arc-suppressing load switch of first embodiment of the invention is in the sectional view of closing position；Fig. 2 is shown in Fig. 1
The arc-suppressing load switch of embodiment is in the sectional view of open position；Fig. 3 is the conducting rod and second of embodiment illustrated in fig. 1 switch
The structural representation of conducting end released state.
As Figure 1-3, arc-suppressing load switch includes the first conducting end 11, the second conducting end 13 (see Fig. 3) and a quilt
The conducting rod 12 of powered motion.By the motion of conducting rod 12, will can reach between the first conducting end 11 and the second conducting end 13
Electrically conduct or disconnect, to realize the operation of the switch closing and switch opening of switch.
Wherein Fig. 1 examples are "on" position, the first contact 111 of the conducting end 11 of first end 121 and first of conducting rod 12
Conductive contact, the second end 122 of conducting rod 12 and the conductive contact of the second contact 131 of the second conducting end 13；Fig. 2 examples are separating brake
State, the first end 121 of conducting rod 12 leave the first contact 111 of the first conducting end 11, although the second of the second conducting end 13
Second end 122 conductive contact of the contact 131 still with conducting rod 12, but the first conducting end 11 and the second conducting end 13 are in disconnection
State.
With reference to shown in Fig. 1 and Fig. 3, wherein the second conducting end 13 includes the second conducting end insulating base 133, is fixed on second
The second contact base 132, the second contact 131 and a piston rod 134 on conducting end insulating base 133, for fixing the piston
The piston rod base 135 of bar 134.
Second end of piston rod 134 is fixed on the piston rod base 135 of an insulating property (properties), and is set with vertical direction
Put, the first end of piston rod 134 is provided with a ring groove 1341, inserts sealing ring 1342 in the ring groove 1341, the piston
The first end of bar 134 coordinates the sealing ring 1342 to collectively constitute a piston, and the piston is built in the cavity of conducting rod.
In the present embodiment, the second conducting end insulating base 133, the second contact base 132, have among the second contact 131
Hole passes through for the piston rod 134；In other words, the second conducting end insulating base 133, the second contact base 132 and the second contact 131
It is the outside that ring is located at piston rod 134, centre has the hole passed through for piston rod 134.Wherein the second contact 131 is preferably one
Sleeve-shaped conductive contact with inside elastic force, such as plum blossom contact；Plum blossom contact is by several metallic conduction pieces with gap
A ring is surrounded, the turn of binding is provided with the periphery of ring.By the elastic force of the turn, make the second contact 131
Inside elastic force is remained, and by the elastic force, it can be encircled in the outside of shaft-like electric-conductor, formed reliable conductive
Connection.As shown in figure 3, one end of the second contact 131 is under spring force, encircle in the outside of the second contact base 132, and
It is formed reliably to electrically connect and interfix；The other end of second contact 131 is available for encircling in another shaft-like electric-conductor
Outside, form reliable electrical connection.As shown in figure 3, second contact 131 is located on the outside of the piston rod 134, and the two
Between form a gap, and the gap is just interposed therebetween for a conducting rod 12, now the outer wall quilt of the second end 122 of conducting rod 12
Second contact 131, which is encircled and reached, to be conductively connected.
In conjunction with Fig. 1 to Fig. 3 structure, conducting rod 12 actually one it is hollow, there is the tubular metal of a cavity 123
Part, the conducting rod 12 are conductive.Its cavity 123 can stored air.Conducting rod 12 is sheathed on the outside of piston rod 134,
And the sealing ring 1342 on piston rod 134 can be just in close contact with the internal face of conducting rod cavity 123, sealing effectiveness is realized, is made
The gas held SPACE V of a variable-volume is formed in cavity 123 positioned at the part above of piston rod 134.In other words, the work
The one end of stopper rod 134 with sealing ring 1342 in fact forms first piston structure, and the piston is accommodated in the cavity 123
In, available for sealing and compressed gas.
Conducting rod 12 external connection, one connecting lever 14, connecting lever 14 are the operating side of separating brake or combined floodgate, and connecting lever 14 is with moving conductive
Bar 12 moves up and down, and during conducting rod 12 moves, its relatively described second contact 131 slides, but due to the second contact
131 be a kind of conductive ring set with inside elastic force, therefore the second contact 131 can be closely against conduction by its inside elastic force
The outside of bar 12, make in the motion process of conducting rod 12, the second contact 131 is conductively connected with being remained in that to conducting rod 12, real
Now flexible campaign-styled connection.
With reference to shown in Fig. 2, Fig. 3, the first end 121 of the conducting rod 12, specifically set in the first end end of conducting rod 12
There are an air current spray nozzle 15 and an aerogenesis element 17.Wherein air current spray nozzle 15 includes a cavity 151 and a mouth
152, the cavity 151 is located at the bottom of the air current spray nozzle 15, can keep in a certain amount of accumulation gas, wherein also including aerogenesis member
Arc extinguishing gases caused by part 17.The bottom of air current spray nozzle 15 is fixedly connected with the first end 121 of conducting rod 12, and is held with the gas
SPACE V of receiving forms gas connection state.Mouth 152 is located at the top of the air current spray nozzle 15, and upwardly extends certain length, uses
High velocity air is sprayed in pressure accumulation.The aerogenesis element 17 is solid made of the material of releasable arc extinguishing gases under the high heat effect of high temperature
Volume elements part.Preferably, aerogenesis element 17 is allowed to be arranged in the cavity 151 of air current spray nozzle 15.The purpose being so designed that is separating brake production
The high temperature high fever that raw electric arc is brought, the gasification of the surface of aerogenesis element 17 is set to discharge arc extinguishing gases, arc extinguishing gases are in cavity 151
It is temporary, band is rushed by the high-voltage high-speed air stream squeezed out out of conducting rod inner bore cavity 123, in the lump from the mouth of air current spray nozzle 15
Ejected at first 152, be favorably improved arc extinguishing efficiency.Therefore, aerogenesis element 17 is arranged in the cavity 151 of air current spray nozzle 15
Portion, it can farthest improve the ability and utilization ratio of aerogenesis.For example, the aerogenesis element 17 selection is that one kind can be by
Polytetrafluoroethylene (PTFE) is made or the solid-state components of teflon mixture.
In the end also dynamic striking contact 16 of fixed knot unification of the first end 121 of conducting rod 12.As shown in Figure 3, move
Striking contact 16 is also selected in the cavity 151 of air current spray nozzle 15, and dynamic striking contact 16 includes a dynamic striking contact sheet
Body 161 and contact 162, the lower section of 162 face mouth of contact 152, can be from mouth so as to the quiet striking contact 114 of upper conductive seat 11
, finally can be with the conductive contact of contact 162 after through hole among 152 enters.Wherein the arc automatic starting contact body 161 of contact 162 is hung down
Straight extension is in a cylinder-like structure, and aerogenesis element 17 is an aerogenesis ring, is set in the outside of the contact 162, among aerogenesis ring
There is the through hole of an axial direction, the gas that the through hole is not only available in gas held SPACE V smoothly sprays, and also provides quiet striking contact
114 extend there through.A determining deviation is preferably had between aerogenesis ring and contact 162, the spacing is easy to gas caused by aerogenesis ring suitable
Freely discharge.
In conjunction with the structural representation of the upper conductive seat 11 shown in Fig. 1, Fig. 2.First conducting end 11 is led including one first
Electric end insulating base 113, first contact base 112, the section of the first contact base 112 are fixed with the insulating base 113
General is in " Jiong " font.First contact 111 is preferably a sleeve-shaped conductive contact with inside elastic force, such as plum blossom contact；
Plum blossom contact surrounds a ring by several metallic conduction pieces with gap, and the spring of binding is provided with the periphery of ring
Circle.Whereby, first contact 111 remains inside elastic force, therefore can encircle in the outside of a shaft-like electric-conductor, shape
Into being reliably conductively connected.Wherein one end lock ring of the first contact 111 in the outside of the first contact base 112 and is conductively connected.First
Second end of contact 111 extends downwardly from, and forming one on the inside of the second end of first contact 111 is available for conducting rod 12 to stretch into
Docking space.A quiet striking contact 114 is also fixed with first contact base 112, the quiet striking contact 114 is arranged on
The inner side of one contact 111, quiet striking contact 114 than first contact 111 the second end more on the lower (closer to conducting rod
12).The quiet striking contact 114 is fixed and is conductively connected first contact base 112, to form blow-out circuit.The quiet striking
Contact 114 can penetrate at the mouth 152 of the air current spray nozzle 15 of the first end of conducting rod 12, until with positioned at the lower section of mouth 152
The contact 162 of dynamic striking contact connects.
The making process of the arc-suppressing load switch 100 is：Switch mediation, which is closed a floodgate, to be indicated, operates connecting lever 14, band moving conductive rod
12 move up, and now the volume of gas held SPACE V becomes larger and air is sucked constantly at mouth 152；With conduction
Bar 12 is entered in the docking space of the lower section of the first contact 111 inner side, and the elastic force that the first contact 111 is inwardly received with it is tightly encircled
Firmly the outer wall of conducting rod 12, which forms, is reliably conductively connected, until range is moved on conducting rod 12, now gas held
The volume of SPACE V is in maximum rating (such as Fig. 1 Vmax).At the same time, the quiet striking contact 114 on the first contact base 112
The contact 162 for penetrating and moving striking contact at the mouth 152 of the air current spray nozzle 15 of the first end of conducting rod 12 is conductively connected.
The separating brake process of the arc-suppressing load switch 100 is：Switch is connected to separating brake instruction, and operation connecting lever 14 is with moving conductive rod 12
Entirety moves down (Fig. 2 right side arrows signified), now because piston rod 134 is that motionless (piston rod 134 plays compressed gas
And the effect of the guiding linear motion of conducting rod 12), and the cavity of the sealing ring 1342 of the first end of piston rod 134 and conducting rod 12
123 inwalls cause gas held SPACE V constantly to diminish (such as Fig. 2 Vmin), and form high speed and high pressure gas to extinguish in sealing
Caused electric arc.At the same time, set aerogenesis element 17 in the cavity 151 of air current spray nozzle 15, its high temperature by separating brake electric arc
High fever energy affect, the gasification of its surface produce a large amount of arc extinguishing gases, accumulate and are temporarily stored in cavity 151 first and (avoid outside gas
Let out pollution environment), then electric arc is rushed at together with the air squeezed out from gas held SPACE V, lift arc extinguishing ability.
Wherein, aerogenesis element 17 is an aerogenesis ring in an outside of the contact for being set in dynamic striking contact 162, thus with
It is elongated the usage time of switch, the aerogenesis loop member that can more renew as needed.And aerogenesis ring is located inside cavity 151, gas
Between the mouth 152 of flow nozzle and dynamic striking contact 16, avoid arc extinguishing gases caused by high temperature from leaking, and can obtain to greatest extent
The aerodynamic energy percussion of gas held SPACE V extrusion, obtains larger initial velocity.Quiet striking contact 114 is compared with the first contact 111
Closer to conducting rod 12, therefore in separating brake, what is disconnected at first is the contact 111 of conducting rod 12 and first, and next is only quiet striking and touched
First 114 with dynamic striking contact 16；Therefore, in the stage begun breaking, a large amount of electric currents can focus on quiet striking contact 114 and draw with dynamic
On the loop of arcing contact 16, then quiet striking contact 114 disconnects with dynamic striking contact 16, therefore hard arc is concentrated in dynamic striking and touched
Near first 16, therefore aerogenesis element 17 is enclosed on outside the contact 162 of dynamic striking contact 16, more can farthest utilize electric arc
Energy, improve gas producing efficiency and utilization ratio.
In the present embodiment, the movement travel maximum of conducting rod 12 may be set to 140mm, can meet that the design of miniaturization will
Ask.Closing a floodgate, during separating brake and compressed-air arc-extinguishing, aerogenesis arc extinguishing, unique movement parts are the one of conducting rod 12, only conducting rod 12
Individual folding process can complete the action of separating brake, striking, arc extinguishing.Compared to existing technologies, its arc-suppression function part is only set
Put the end of conducting rod 12 (without setting any arc-suppression function part to the first conducting end conformability), there is structure more
Simply, the characteristics of more ingenious is designed.And conducting rod internal cavity 123 is in hollow form, therefore relatively sufficiently large gas can be provided
Receiving space, sharp basic condition is provided with to form the more arc extinguishing air draughts of more high-voltage high-speed.Overall structure is simple, will press
Gas arc extinguishing structure and aerogenesis arc extinguishing structure is organic deftly combines, cost can also be reduced by not only improving arc extinguishing efficiency, and be realized
The miniaturization of product.
Wherein, the first contact 111, the second contact 131 used in the present embodiment are plum blossom contact, in other embodiment
In, be alternatively chosn to annular spring touch finger or a kind of conductive ring set of claw comprising multiple Longitudinal extendings etc. similar to can be with ring
The structure of contact terminal that the mode of embracing is conductively connected.
Although it is in the present embodiment, to coordinate piston rod 134 to form the work sealed with cavity 123 with sealing ring 1342
Plug structure, but in other embodiments, the first end of piston rod 134 can combine a rubber cock body, instead of sealing ring 1342.This
Outside, in other embodiments, connecting lever 14 is alternatively into any driving structure for driving conducting rod 12 to move up and down.
Embodiment two
Fig. 4 is the mplifying structure schematic diagram that the second preferred embodiment of the invention switchs air current spray nozzle and dynamic striking contact；Figure
5A is the diagrammatic cross-section of the dynamic striking contact of the second preferred embodiment switch of the invention.Fig. 5 B are preferably implemented for the present invention second
The vertical view face schematic diagram of the dynamic striking contact of example switch.
Fig. 4, Fig. 5 A, Fig. 5 B correspond to the second embodiment of the present invention, in the present embodiment, mainly for the He of air current spray nozzle 15
Dynamic striking contact 16 is optimized and improved, and other parts repeat no more again referring to the description of embodiment one.Traditional air-flow
Or nozzle at all without accumulation air-flow cavity, or not to air current spray nozzle 15 spray air velocity distribution do it is any research with
Design.
, in the figure can be clear referring specifically to the thin portion schematic enlarged-scale view for the first end 121 for shown in Fig. 4, being conducting rod 12
See the structure of the cavity 152 of air current spray nozzle 15 in ground；It may be clearly seen that the thin portion knot of dynamic striking contact 16 in Fig. 5 A, Fig. 5 B
Structure.
Wherein, it is in " convex " shape air current spray nozzle 15 that the end of the first end 121 of conducting rod 12, which combines,.Air current spray nozzle 15 is except bag
Include cavity 151, outside mouth 152, in addition to a throat 153.Throat 153 is located at the lower section of mouth 152, is a reducing diameter part
(i.e. relative to adjacent regions at this passage it is narrower), for cavity 151 and connection mouth 152.In the present embodiment, throat 153
Provided with least one air-flow guide groove 1531, the air-flow guide groove 1531 can be circular, single scroll, bipitch shape or several are discrete
Scroll line segment, at its key position throat 153 passed through needed for the air-flow, the air-flow for making to be sprayed by mouth 152 produces
Spiral effect, lift the ability of arc extinguishing.
In order to further lift the arc extinguishing ability that air-flow sprays from air current spray nozzle 15, in the present embodiment, also air-flow is sprayed
The inwall of cavity 151 of mouth 15 improves.Specifically as shown in figure 4, the inwall 1511 in cavity 151 is connected to below mouth 152
Position is provided with inclined-plane 1512 (being represented preferably adjacent to the lower section overstriking oblique line of throat 153), and the inclined-plane 1512 is from top to down to mouth
152 direction is tilted, and " eight " word is formed in the both sides of mouth 152, is formed with the axis direction of conducting rod 12 and is less than or equal to 90 °
Angle 1513, preferably 40-80 °, it will make gas converged in this position after recoil blow to the root of electric arc, lift arc extinguishing
Ability.
In conjunction with Fig. 5 A optimized to moving the thin portion of striking contact 16.Dynamic striking contact 16 includes a dynamic striking contact sheet
The contact 162 that the centre of body 161 and driven striking contact body 161 upwardly extends, move striking contact body 161 and conducting rod 12
Electrical connection.Contact 162 is a kind of cylinder-like structure surrounded comprising multiple petal-shaped elastic contact blades, and its internal diameter is slightly larger than or almost
Equal to the external diameter of quiet striking contact 114, quiet striking contact 114 can be plugged into the center of contact 162, and wears to this and move striking contact sheet
The distance of the lower section of body 161 one (than the lower end of first contact 111 more lean on by the lower end that embodiment one has described quiet striking contact 114
Lower section, apart from conducting rod 12 closer to).Contact 162 can rely on the elastic force itself inwardly received, and ensure relatively remote in dynamic striking contact 16
During the quiet striking contact 114, contact 162 still can form reliable conductive with quiet striking contact 114 and be connected, and be advantageous to
Electric current is transferred in galvanic circle from striking contact loop during drop-out current goes (to return where the first contact 111, the second contact 131
Road is referred to as galvanic circle), improve the electric current transfer ability of switch.Wherein aerogenesis element 17 is ring set in the dynamic striking contact
The outside of 16 petal-shaped elastic contact blade 162, at utmost to be gone out using the arc energy near dynamic striking contact 16 to produce
Arc gas.Some also can be set around the outside of contact 162 in dynamic striking contact body 161 to be used to fix (the production of aerogenesis element 17
Compression ring) groove structure.The structure of above-mentioned petal-shaped elastic contact blade is interpreted as any one referring to shown in Fig. 5 A or Fig. 5 B
Include the structure of multiple elastic conducting strips that a longitudinal profile groove between any two be present.
With reference to Fig. 5 A, Fig. 5 B, dynamic striking contact body 161 is provided with multiple open-works 1611, and these open-works 1611 are preferably
Centered on the contact 162, Central Symmetry state is formed.Because dynamic striking contact body 161 is conductively connected and tied with its periphery
Conjunction is fixed at the port of cavity 123 of conducting rod 12, and these open-works 1611 not only can swimmingly export the air (contact of compression
162 centers also can air guide for the holes of quiet striking contacts 114 insertion), the air pressure of gas is also can further improve, and symmetrically flow to
The mouth 152 of nozzle, prevents gas imperfect flow from causing speed loss.
In the present embodiment, under on-load switch gate-dividing state, the end of conducting rod 12 is disconnected for pure insulation with the first contact 111
Mouthful, while realize the function of on-load switch and disconnecting switch.And it should be appreciated by those skilled in the art that pure insulation fracture refers to
Between static contact and moving contact in open position, between dynamic and static contact in addition to institute's inflatable body, any other thing is not bridged
Matter；Now some products have bridges in the art, and the material for connecing thing is mainly made of insulating materials, as epoxy resin,
Polytetrafluoroethylene (PTFE), makrolon etc..
It is described above, it is only the representational embodiment of the present invention, but protection scope of the present invention is not limited to
This, any one skilled in the art the change that can readily occur in or replaces in the technical scope of present disclosure
Change, should all be included within the scope of the present invention.
Claims (17)
1. a kind of arc-suppressing load switch, including first conducting end, the second conducting end and one being capable of reciprocal fortune driven
Dynamic conducting rod, the combined floodgate of first conducting end and the second conducting end is realized by the reciprocating motion of the conducting rod or divided
Lock；It is characterized in that：
First conducting end includes the first contact, and the conducting rod is mobile to first conducting end and when contacting, Neng Gouyu
First contact is conductively connected；
Second conducting end includes a piston and the second contact；Second contact is located at the outside of the piston, and institute
State one gap of formation between the second contact and the piston；
The conducting rod is a hollow structure with cavity；The conducting rod is installed on the gap, and by the piston
It is contained in the cavity, second contact is then contacted in the outer surface of the conducting rod, and second contact is with being moved through
The conducting rod in journey keeps electrical connection；The piston forms the gas held space of a variable-volume with the cavity；
The conducting rod includes the first end towards first conducting end, and the second end towards second conducting end；
The first end of wherein described conducting rod is provided with an air current spray nozzle connected with the gas held space and an aerogenesis member
Part；
The conducting rod, to be conductively connected with first conducting end, reaches conjunction to the direction movement close to first conducting end
Lock state, now the gas held spatial volume change is big；
The conducting rod is separated to the direction movement away from first conducting end with being led with first conducting end, reaches separating brake
State, the aerogenesis element receive the conducting rod and caused arc energy are separated with first contact, discharge arc extinguishing gas
Body is to extinguish electric arc；Simultaneously the volume-diminished in the gas held space and produce air-flow, sprayed from the air current spray nozzle to put out
Go out electric arc.
2. arc-suppressing load switch according to claim 1, it is characterised in that：The air current spray nozzle includes a hollow sky
Chamber and a mouth, the mouth is located at the top of the air current spray nozzle, for spraying air-flow；The air current spray nozzle is with its bottom
The first end of the conducting rod is incorporated in, the cavity is between the top and bottom of the air current spray nozzle.
3. arc-suppressing load switch according to claim 2, it is characterised in that：The aerogenesis element is located at the institute of air current spray nozzle
State in cavity.
4. according to the arc-suppressing load switch described in claim 1 or 2 or 3, it is characterised in that：First conducting end also includes one
Individual first contact base and a quiet striking contact, first contact and the quiet striking contact are fixed and are conductively connected in institute
State the first contact base；The end of the quiet striking contact is than first contact closer to the conducting rod；The conducting rod
First end is additionally provided with a dynamic striking contact being connected with the quiet striking contacts mates, the dynamic striking contact and the conduction
Bar is conductively connected.
5. arc-suppressing load switch according to claim 4, it is characterised in that：The dynamic striking contact includes a dynamic striking
Contact body and from the dynamic vertically extending multiple petal-shaped elastic contact blades of striking contact body；The dynamic striking contact body
Electrically connected with the conducting rod；The petal-shaped contact forms ring-type, can encircle in the outside of the quiet striking contact, make
Quiet striking contact described in separating brake moment still keeps being conductively connected with the dynamic striking contact, and electric current can shift from conductive end loops
Into striking contact loop.
6. arc-suppressing load switch according to claim 5, it is characterised in that：The dynamic striking contact is located at air-flow spray
The bottom of the cavity of mouth, and the aerogenesis element is located between the inwall of the air current spray nozzle and the dynamic striking contact.
7. arc-suppressing load switch according to claim 6, it is characterised in that：The aerogenesis element is a gas exhausted material system
Make the aerogenesis ring formed, the aerogenesis ring set is through the outside of the petal-shaped contact of the dynamic striking contact.
8. arc-suppressing load switch according to claim 7, it is characterised in that：The dynamic striking contact body is provided with several
Open-work, the position of the open-work form Central Symmetry centered on the petal-shaped contact.
9. arc-suppressing load switch according to claim 3, it is characterised in that：The air current spray nozzle also includes a throat,
The throat be located at the mouth lower section be used for connect the cavity, the throat is provided with least one air-flow guide groove, make by
The air-flow that mouth sprays produces spiral effect.
10. arc-suppressing load switch according to claim 9, it is characterised in that：The air-flow guide groove is circular, continuous spiral shell
Linear or discrete scroll line segment.
11. according to the arc-suppressing load switch described in claim 3 or 9 or 10, it is characterised in that：In the cavity of the air current spray nozzle
Wall, inclined-plane is set as in the position being connected to below the mouth, the inclined-plane is distributed in the mouth both sides in eight words, described oblique
The axis direction of face and the conducting rod forms the angle less than or equal to 90 °.
12. arc-suppressing load switch according to claim 11, it is characterised in that：The angle is 40-80 °.
13. arc-suppressing load switch according to claim 1, it is characterised in that：The piston is located at the one of a piston rod
End, the other end of the piston rod are fixed on piston rod base.
14. arc-suppressing load switch according to claim 1, it is characterised in that：Second contact and/or it is described first touch
Head is a sleeve-shaped conductive contact with inside elastic force, and the second contact ring is located at the outside of the piston, and with institute
State and form the gap between piston；Second contact is encircled in the outside of the conducting rod by its inside elastic force, makes this
Conducting rod keeps being conductively connected with second contact all the time in reciprocating movement；First contact is by it inside
Elastic force is conductively connected with constantly reaching to itself close conducting rod.
15. arc-suppressing load switch according to claim 14, it is characterised in that：Second contact and first contact
For the conductive ring set of a plum blossom contact, the spring touch finger of annular or a claw comprising multiple Longitudinal extendings.
16. arc-suppressing load switch according to claim 1, it is characterised in that：The external connection one of the conducting rod turns
Arm, the connecting lever drive the conducting rod to move up and down, and realize combined floodgate and sub-switching operation.
17. arc-suppressing load switch according to claim 1, it is characterised in that：Multiple petal-shapeds of the dynamic striking contact
The internal diameter that elastic contact blade is formed is smaller than the external diameter of quiet striking contact, and is made up of the copper tungsten material of resistance to electric arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812584.6A CN107564764B (en) | 2017-09-11 | 2017-09-11 | Arc extinguishing load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812584.6A CN107564764B (en) | 2017-09-11 | 2017-09-11 | Arc extinguishing load switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107564764A true CN107564764A (en) | 2018-01-09 |
| CN107564764B CN107564764B (en) | 2021-02-05 |
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ID=60980365
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710812584.6A Active CN107564764B (en) | 2017-09-11 | 2017-09-11 | Arc extinguishing load switch |
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| Country | Link |
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| CN (1) | CN107564764B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400060A (en) * | 2018-05-05 | 2018-08-14 | 中科天工电气控股有限公司 | A kind of limited pressure arc-suppressing contactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237888Y (en) * | 1995-03-26 | 1996-10-16 | 福建东方电器有限公司 | High-voltage indoor air compressed load switch |
| CN201608097U (en) * | 2010-02-10 | 2010-10-13 | 无锡市蓝虹电子有限公司 | Air type high-voltage load switch |
| CN102760607A (en) * | 2012-07-24 | 2012-10-31 | 上海天灵开关厂有限公司 | Pressure-operated load switch for gas-insulated ring main unit |
| CN207800487U (en) * | 2017-09-11 | 2018-08-31 | 厦门华电开关有限公司 | Arc-suppressing load switch |
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2017
- 2017-09-11 CN CN201710812584.6A patent/CN107564764B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237888Y (en) * | 1995-03-26 | 1996-10-16 | 福建东方电器有限公司 | High-voltage indoor air compressed load switch |
| CN201608097U (en) * | 2010-02-10 | 2010-10-13 | 无锡市蓝虹电子有限公司 | Air type high-voltage load switch |
| CN102760607A (en) * | 2012-07-24 | 2012-10-31 | 上海天灵开关厂有限公司 | Pressure-operated load switch for gas-insulated ring main unit |
| CN207800487U (en) * | 2017-09-11 | 2018-08-31 | 厦门华电开关有限公司 | Arc-suppressing load switch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400060A (en) * | 2018-05-05 | 2018-08-14 | 中科天工电气控股有限公司 | A kind of limited pressure arc-suppressing contactor |
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| Publication number | Publication date |
|---|---|
| CN107564764B (en) | 2021-02-05 |
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