CN207800487U - Arc-suppressing load switch - Google Patents

Abstract

The utility model is related to power equipment technologies, specifically disclose a kind of arc-suppressing load switch, including the first, second conducting end and the conducting rod that is moved back and forth by driving, and conducting rod movement, which is realized, closes a floodgate and separating brake.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 being electrically connected during the motion with conducting rod；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 conduction boom end is equipped with the air current spray nozzle being connected to the gas held space and aerogenesis element.When separating brake, conducting rod, which moves down, makes gas held space become smaller 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

Arc-suppressing load switch

Technical field

The utility model is related to power equipment technologies, relate in particular to one kind and having both two kinds of compressed-air arc-extinguishing and aerogenesis arc extinguishing The arc-suppressing load switch of arc quenching method.

Background technology

When using device for switching turn-off current, if circuit voltage is lied prostrate higher than 10-20, electric current is higher than 80~100mA, Electric arc will be generated between the contact of electric appliance.Electric arc is that two interpolars generate strong and lasting gas discharge phenomenon, is substantially high The highly conductive free gas of temperature, it not only has prodigious destruction to contact, but also 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 China 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 comparative superiorities, As the patent of invention document of Chinese 101425421 A of publication number CN discloses this technology, but SF6 gases are non-environmental protection gas Body, development and application are restricted；Traditional air pressing type and air-generating product is influenced by arc extinction performance, and volume is all more non- Chang great cannot achieve miniaturization, and the utility model patent document of such as Chinese 2256584 Y of Granted publication CN discloses one kind Safe air pressing type airload switch.In conclusion current on-load switch is mostly almost individually with a kind of above side 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 to be advanced optimized.

In addition, the design for air pressing type and air-generating structure is all relative coarseness at present, it is not directed to arc extinguishing structure The design refined with air flow structure cannot achieve miniaturization, reduce cost so arc extinction performance is all poor.

Invention content

The mesh of the utility model, which is to provide, a kind of to go out air pressing type arc extinguishing structure with what air-generating arc-extinguishing clever structure was combined Arc on-load switch structure improves arc extinction performance, reduces cost.

Second purpose of the utility model is to provide a kind of arc extinguishing load of striking structure of contact terminal with optimization and opens It closes, the ability of electric current transfer when improving drop-out current.

The third purpose of the utility model is to provide a kind of arc-suppressing load switch of the nozzle arrangements with optimization, energy Enough optimization airflow flow fields, strengthen arc extinguishing ability.

In order to realize above-mentioned purpose of utility model, the utility model adopts the following technical solution：

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 movement is realized the combined floodgate of first conducting end and the second conducting end by the reciprocating motion of the conducting rod or is divided Lock；

First conducting end includes the first contact, when the conducting rod is simultaneously close to first conducting end movement, energy It is enough to be conductively connected with first contact；

Second conducting end includes a piston and the second contact；Second contact is set to 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 will be described 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 constitutes the gas held of a variable-volume with the cavity Space；

The conducting rod includes towards the first end of first conducting end, and towards the second of second conducting end End；The first end of the wherein described conducting rod sets that there are one the air current spray nozzle that is connected to the gas held space and an aerogenesis Element；

The conducting rod is moved to close to the direction of first conducting end to be conductively connected with first conducting end, is reached To "on" position, the gas held spatial volume becomes larger and sucks gas at this time；

The conducting rod is moved to the direction far from first conducting end and is detached with being led with first conducting end, is reached Gate-dividing state, the aerogenesis element receive the arc energy generated when the conducting rod is detached with first contact, and release is gone out Arc gas is to extinguish electric arc；Simultaneously the gas held space volume-diminished and generate high pressure draught, from the air current spray nozzle It sprays to extinguish electric arc.

In one feasible embodiment of the utility model, the air current spray nozzle includes a hollow cavity and a mouth Head, the mouth is set to the top of the air current spray nozzle, for spraying air-flow；The air current spray nozzle is incorporated in described with its bottom The first end of conducting rod, the cavity is between the top and bottom of the air current spray nozzle.

In one preferred embodiment of the utility model, the aerogenesis element is set in the cavity of air current spray nozzle, no The arc extinguishing gases that can only prevent leak into environment, and also rush at electric arc using the kinetic energy calmed the anger with certain speed, With higher arc extinguishing ability.

In one feasible embodiment of the utility model, first conducting end further includes first contact base and one Quiet striking contact, first contact and the quiet striking contact are fixed and are conductively connected in first contact base；It is described The end of quiet striking contact is than first contact closer to the conducting rod；The first end of the conducting rod be additionally provided with one with The dynamic striking contact of the quiet striking contacts mates connection, the dynamic striking contact are conductively connected with the conducting rod.

In one feasible embodiment of the utility model, the dynamic striking contact is including a dynamic striking contact body and certainly The vertically extending multiple petal-shaped elastic contact blades of dynamic striking contact body；The dynamic striking contact body and the conducting rod Electrical connection；The petal-shaped elastic contact blade forms ring-type, can encircle in the outside of the quiet striking contact, make in separating brake moment The quiet striking contact still keeps being conductively connected with the dynamic striking contact, so that electric current is transferred to institute from arc contact circuit It states in the galvanic circle that the first contact and the second contact are formed, improves electric current transfer ability.

In one feasible embodiment of the utility model, the dynamic striking contact is located at the bottom of the cavity of the air current spray nozzle Portion, and the aerogenesis element is located between the mouth of the air current spray nozzle and the dynamic striking contact.In this way, aerogenesis element can be made Most arc energy is received, and the arc extinguishing gases generated can obtain initial velocity to the maximum extent, improve aerogenesis element and utilize The efficiency of arc energy, generates arc extinguishing gases faster and more.

In one feasible embodiment of the utility model, the aerogenesis element is the aerogenesis that a gas exhausted material is made Ring, the aerogenesis ring set are through the outside of the petal-shaped elastic contact blade of the dynamic striking contact, effectively fixed aerogenesis element.

In one feasible embodiment of the utility model, the dynamic striking contact body is equipped with several open-works, described The position in hole forms central symmetry centered on the petal-shaped elastic contact blade.

In one feasible embodiment of the utility model, the air current spray nozzle further includes a throat, and the throat is located at The lower section of the mouth is equipped at least one air-flow guide groove, makes the gas sprayed by mouth for connecting the cavity, the throat The raw spiral effect of miscarriage.Preferably, the air-flow guide groove is round, continuous scroll or discrete scroll line segment.

In one feasible embodiment of the utility model, the cavity inner wall of the air current spray nozzle, in being connected to the mouth The position of lower section is set as inclined-plane, and the inclined-plane is in the mouth both sides in eight words distribution, the axis on the inclined-plane and the conducting rod Line direction forms the angle less than or equal to 90 °；Preferably 40-80 °.

In one feasible embodiment of the utility model, the piston is set to one end of a piston rod, the piston rod The other end be fixed on piston rod base.

In one feasible embodiment of the utility model, second contact and/or first contact are one and have The sleeve-shaped conductive contact of inside elastic force, the second contact ring are located at the outside of the piston, and the shape between the piston At the gap；Second contact is encircled by its inside elastic force in the outside of the conducting rod, makes the conducting rod reciprocal It is conductively connected always with second contact holding in moving process；First contact by its inside elastic force with constantly to Itself close conducting rod, which is reached, to be conductively connected, and has the effect of that grasping conducting rod forms reliable conductive connection.

In one feasible embodiment of the utility model, second contact and first contact are that a plum blossom touches Piece, the spring touch finger of annular or a conductive ring set for including multiple claws being longitudinally extended.

In one feasible embodiment of the utility model, one connecting lever of external connection of the conducting rod, the connecting lever drives It moves the conducting rod to move up and down, realizes combined floodgate and separating brake.

In one feasible embodiment of the utility model, wherein second conducting end further includes an insulating base, institute The second contact base is stated to be fixed on the insulating base.

In one feasible embodiment of the utility model, wherein first conducting end further includes an insulating base, institute The first contact base is stated to be fixed on the insulating base.

In one feasible embodiment of the utility model, the aerogenesis element or aerogenesis ring are by polytetrafluoroethylene (PTFE) or polytetrafluoro Mixture of ethylene is made.

The advantageous effects of the utility model include：

The utility model also utilizes its hollow cavity phase using cleverly structure while so that conducting rod is served as moving contact Piston rod is moved to form high pressure draught and spray and plays the role of arc extinguishing；And the first end that aerogenesis element is set to conducting rod is (dynamic Contact end), it makes full use of the high heat effect of the high temperature of electric arc to make aerogenesis element aerogenesis, plays the role of aerogenesis arc extinguishing.It is new in this practicality In type, the conducting rod is displaced between the first and second conducting end；Conducting rod itself has longer length, and it is entire interior Portion's cavity is in complete hollow form, therefore the variable-volume in gas held space can be made to have wider threshold range, can be to be formed The more arc extinguishing air-flows of more high-voltage high-speed provide advantageous basic condition.The utility model overall structure is simple, goes out calming the anger Arc structure and the organic dexterous combination of aerogenesis arc extinguishing structure, cost can also be reduced by not only improving arc extinguishing efficiency, additionally aid realization The miniaturization of product.

In addition, the utility model also air current spray nozzle with hollow cavity structure, and aerogenesis element is placed in the cavity, It is placed near dynamic striking contact, can farthest utilize arc energy, improve the ability and utilization ratio of aerogenesis, Make the arc extinguishing gases of generation as the air stream of high speed and high pressure is ejected into electric arc root together, promotes arc extinguishing ability.

Furthermore the utility model also specially improves the cavity of air current spray nozzle and throat, optimizes air velocity distribution Performance；The utility model has also advanced optimized the fit structure of dynamic striking contact and quiet striking contact, is conducive to drop-out current Moment, electric current can be transferred to from conductive end loops in striking contact circuit.

Wherein, first, second contact of the utility model is the sleeve-shaped conductive contact with inside elastic force, can form spirit The galvanic circle of also electrically conductive connection in movement living.

Description of the drawings

Fig. 1 is that the arc-suppressing load switch of the utility model first embodiment 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 structural schematic diagram of the conducting rod and the second conducting end discrete state of embodiment illustrated in fig. 1 switch；

Fig. 4 is the enlarged structure signal that the second preferred embodiment of the utility model switchs air current spray nozzle and dynamic striking contact Figure；

Fig. 5 A are the diagrammatic cross-section of the dynamic striking contact of the second preferred embodiment of the utility model switch.

Fig. 5 B are the vertical view face schematic diagram of the dynamic striking contact of the second preferred embodiment of the utility model switch.

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 Contact 114, the 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, conduction Bar second end 122, conducting rod cavity 123, gas held SPACE V, air current spray nozzle 15, air current spray nozzle cavity 151, mouth 152, larynx Portion 153, air-flow guide groove 1531, cavity inner wall 1511, inclined-plane 1512, angle 1513, dynamic striking contact 16, dynamic striking contact sheet Contact 162, open-work 1611, the aerogenesis element 17 of body 161, dynamic striking contact.

Specific implementation mode

Embodying the exemplary embodiments of the utility model features and advantages will describe in detail in the following description.It should be understood that Various variations can be had in different embodiments by being the utility model, all not depart from the scope of the utility model, and Explanation therein and attached drawing inherently are illustrated as being used, rather than to limit the utility model.

Embodiment one

Fig. 1 is that the arc-suppressing load switch of the utility model first embodiment is in the sectional view of closing position；Fig. 2 is Fig. 1 The arc-suppressing load switch of illustrated embodiment is in the sectional view of open position；Fig. 3 is the conducting rod of Fig. 1 illustrated embodiments switch With the structural schematic diagram of the second conducting end discrete state.

As shown in Figs. 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 drive motion.By the movement of conducting rod 12, can will reach between the first conducting end 11 and the second conducting end 13 It electrically conducts or disconnects, 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 first end 121 of conducting rod 12 and the first conducting end 11 131 conductive contact of the second contact of conductive contact, the second end 122 of conducting rod 12 and the second conducting end 13；Fig. 2 examples are separating brake The first end 121 of state, conducting rod 12 leaves the first contact 111 of the first conducting end 11, although the second of the second conducting end 13 Contact 131 is still with 122 conductive contact of the second end of conducting rod 12, but the first conducting end 11 and the second conducting end 13 have been in disconnected Open state.

In conjunction with 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 on conducting end insulating base 133 and a piston rod 134, for fixing the piston The piston rod base 135 of bar 134.

The 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 It sets, the first end of piston rod 134 is set there are one ring groove 1341, and sealing ring 1342, the piston are inserted in the ring groove 1341 The first end of bar 134 coordinates the sealing ring 1342 to collectively constitute a piston, which 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 is passed 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 spring ring of binding is equipped in the periphery of ring.By the elastic force of the spring ring, make the second contact 131 Remain inside elastic force, and by the elastic force, it can be encircled in the outside of rod-shaped conduct piece, be 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 it is reliable electrical connection and be fixed to each other；The other end of second contact 131 is for encircling in another rod-shaped conduct piece Outside forms 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, at this time 122 outer wall of second end of conducting rod 12 It is encircled and is reached by the second contact 131 and be conductively connected.

In conjunction with the structure of Fig. 1 to Fig. 3, actually hollow, the tubular metal with a cavity 123 of conducting rod 12 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, realize sealing effect, be made It is located at the gas held SPACE V that 134 part above of piston rod constitutes a variable-volume in cavity 123.In other words, the work The one end of stopper rod 134 with sealing ring 1342 in fact constitutes first piston structure, which is accommodated in the cavity 123 In, it can be used 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, 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 makes in 12 motion process of conducting rod, and the second contact 131 is conductively connected with being still maintained to conducting rod 12, real Now flexible campaign-styled connection.

In conjunction with shown in Fig. 2, Fig. 3, the first end 121 of the conducting rod 12 is specifically set in the first end end of conducting rod 12 There are one air current spray nozzle 15 and an aerogenesis elements 17.Wherein air current spray nozzle 15 includes a cavity 151 and a mouth 152, the cavity 151 is located at the lower part of the air current spray nozzle 15, can keep in a certain amount of accumulation gas, wherein also including aerogenesis member The arc extinguishing gases that part 17 generates.15 bottom of air current spray nozzle is fixedly connected with the first end 121 of conducting rod 12, and with the gas Accommodation space V constitutes gas connection state.Mouth 152 is set to the top of the air current spray nozzle 15, and upwardly extends certain length, High-speed flow is sprayed for pressure accumulation.The aerogenesis element 17 is made of the material of releasable arc extinguishing gases under the high heat effect of high temperature Solid-state components.Preferably, aerogenesis element 17 is allowed to be arranged in the cavity 151 of air current spray nozzle 15.The purpose so designed is to divide The high temperature high fever that the electric arc that lock generates is brought makes the gasification of 17 surface of aerogenesis element release arc extinguishing gases, and arc extinguishing gases are in cavity It is kept in 151, band is rushed by the high-voltage high-speed air stream squeezed out out of conducting rod inner bore cavity 123, together from air current spray nozzle It is ejected at 15 mouth 152, helps to improve arc extinguishing efficiency.Therefore, aerogenesis element 17 is arranged in air current spray nozzle 15 Inside cavity 151, the ability and utilization ratio of aerogenesis can be improved to the greatest extent.For example, the aerogenesis element 17 selects It is a kind of can be made of polytetrafluoroethylene (PTFE) or the solid-state components of teflon mixture.

In the end also dynamic striking contact of fixed knot unification 16 of the first end 121 of conducting rod 12.As shown in Fig. 3, move Striking contact 16 also selects 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 162,162 face mouth of contact, 152 lower section, can be from mouth so as to the quiet striking contact 114 of upper conductive seat 11 It, finally can be with 162 conductive contact of contact after through-hole among 152 enters.Wherein 162 arc automatic starting contact body 161 of contact is hung down Straight extend 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 are one axial through-hole, which not only smoothly sprays for the gas in gas held SPACE V, also provides quiet striking contact 114 extend there through.A determining deviation is preferably had between aerogenesis ring and contact 162, the spacing is suitable convenient for the gas that aerogenesis ring generates Freely release.

In conjunction with Fig. 1, the structural schematic diagram of upper conductive seat 11 shown in Fig. 2.First conducting end 11 is led including one first Electric end insulating base 113 is fixed with first contact base 112, the section of the first contact base 112 on the insulating base 113 It is in generally " 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 equipped in the periphery of ring Circle.Whereby, which remains inside elastic force, therefore can encircle in the outside of a rod-shaped conduct piece, shape At being reliably conductively connected.Wherein one end lock ring of the first contact 111 in 112 outside of the first contact base and is conductively connected.First The second end of contact 111 extends downwardly, and form one on the inside of the second end of first contact 111 stretches into for conducting rod 12 Docking space.A quiet striking contact 114 is also fixed on first contact base 112, quiet striking contact 114 setting is the The inside of one contact 111, quiet striking contact 114 than first contact 111 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 from the mouth 152 of the air current spray nozzle 15 of 12 first end of conducting rod, until with positioned at 152 lower section of mouth The contact 162 of dynamic striking contact connects.

The making process of the arc-suppressing load switch 100 is：Switch mediates instruction of closing a floodgate, and operates connecting lever 14, band moving conductive rod 12 move up, and the volume of gas held SPACE V becomes larger and sucks air constantly from mouth 152 at this time；With conduction Bar 12 enters in the docking space of 111 lower section inside of the first contact, and the first contact 111 is tightly encircled with the elastic force that it is inwardly received Firmly the outer wall of conducting rod 12, which forms, is reliably conductively connected, until range is moved on conducting rod 12, gas held at this time The volume of SPACE V is in maximum rating (Vmax of such as Fig. 1).At the same time, the quiet striking contact 114 on the first contact base 112 It penetrates from the mouth 152 of the air current spray nozzle 15 of 12 first end of conducting rod and is conductively connected with the contact 162 of dynamic striking contact.

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), at this time since 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 and conducting rod 12 of 134 first end of piston rod 123 inner walls cause gas held SPACE V constantly to become smaller (Vmin of such as Fig. 2), and form high speed and high pressure gas to extinguish in sealing The electric arc of generation.At the same time, set aerogenesis element 17 in the cavity 151 of air current spray nozzle 15, by the high temperature of separating brake electric arc High fever energy affect, surface gasification generate 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, promote arc extinguishing ability.

Wherein, aerogenesis element 17 is an aerogenesis ring in 162 outside of the contact for being set in dynamic striking contact, thus with The usage time for switch is elongated, 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, the arc extinguishing gases that high temperature generates are avoided to leak, and from can obtaining to greatest extent The aerodynamic energy percussion that gas held SPACE V squeezes out, 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 conducting rod 12 and the first contact 111, next is only quiet striking and touches 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 circuit of arcing contact 16, then quiet striking contact 114 is disconnected with dynamic striking contact 16, therefore hard arc is concentrated in dynamic striking Near contact 16, therefore aerogenesis element 17 is sleeved on outside the contact 162 of dynamic striking contact 16, more can farthest utilize electricity Arc energy improves gas producing efficiency and utilization ratio.

In the present embodiment, the movement travel maximum of conducting rod 12 may be set to 140mm, and the design that can meet miniaturization is wanted It asks.During combined floodgate, separating brake and compressed-air arc-extinguishing, aerogenesis arc extinguishing, unique movement parts are conducting rods 12, only the one of conducting rod 12 The action of separating brake, striking, arc extinguishing has can be completed in a folding process.Compared to existing technologies, arc-suppression function component is only set It sets in the end (without the first conducting end conformability being arranged any arc-suppression function component) of conducting rod 12, there is structure more Simply, more ingenious feature is designed.And conducting rod internal cavity 123 is in hollow form, therefore relatively sufficiently large gas can be provided Accommodation space is provided with sharp basic condition 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 comprising multiple claws being longitudinally extended etc. similar to can be with ring The structure of contact terminal that the mode of embracing is conductively connected.

Although being in the present embodiment, to coordinate piston rod 134 to form one with sealing ring 1342 to seal with cavity 123 Piston structure, but in other embodiments, the first end of piston rod 134 is in combination with a rubber cock body, instead of sealing ring 1342. In addition, in other embodiments, connecting lever 14 is alternatively at any driving structure for driving conducting rod 12 to move up and down.

Embodiment two

Fig. 4 is the enlarged structure signal that the second preferred embodiment of the utility model switchs air current spray nozzle and dynamic striking contact Figure；Fig. 5 A are the diagrammatic cross-section of the dynamic striking contact of the second preferred embodiment of the utility model switch.Fig. 5 B are that this practicality is new The vertical view face schematic diagram of the dynamic striking contact of the second preferred embodiment of type switch.

Fig. 4, Fig. 5 A, Fig. 5 B correspond to the second embodiment of the utility model, in the present embodiment, mainly for air current spray nozzle 15 and dynamic striking contact 16 optimize and improve, other parts repeat no more again referring to the description of embodiment one.Traditional Or air current spray nozzle does any grind without the air velocity distribution accumulated the cavity of air-flow or sprayed to air current spray nozzle 15 at all Study carefully and designs.

It is the thin portion schematic enlarged-scale view of the first end 121 of conducting rod 12 shown in Fig. 4, it in the figure can be clear 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 in addition to packet It includes cavity 151, further includes a throat 153 except mouth 152.Throat 153 is located at the lower section of mouth 152, is a undergauge Portion (i.e. channel is narrower at this relative to adjacent regions), for cavity 151 and connection mouth 152.In the present embodiment, throat 153 are equipped at least one air-flow guide groove 1531, the air-flow guide groove 1531 can be round, single scroll, bipitch shape or several from Scattered scroll line segment is set at the key position throat 153 passed through needed for air-flow, makes the air-flow production sprayed by mouth 152 Raw spiral effect, promotes the ability of arc extinguishing.

In order to further enhance the arc extinguishing ability that air-flow is sprayed from air current spray nozzle 15, in the present embodiment, also air-flow is sprayed 151 inner wall of cavity of mouth 15 improves.Specifically as shown in figure 4, the inner wall 1511 in cavity 151 is connected to below mouth 152 Position is equipped with inclined-plane 1512 (being indicated 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 tilts, and forms " eight " word in 152 both sides of mouth, is formed with the axis direction of conducting rod 12 and be less than or equal to 90 ° Angle 1513, preferably 40-80 °, it will make gas recoil after this position is converged blow to the root of electric arc, promote arc extinguishing Ability.

It is the thin portion optimization to moving striking contact 16 in conjunction with Fig. 5 A.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 moves 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 internal diameter is slightly larger than or almost Equal to the outer diameter of quiet striking contact 114, quiet striking contact 114 can be plugged into 162 center of contact, and wears to this and move striking contact sheet 161 lower section of body, one distance (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 connect, and be conducive to Electric current, which is transferred to from striking contact circuit in galvanic circle, when 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, utmostly to be gone out using the arc energy near dynamic striking contact 16 to generate Arc gas.Some can be also set for fixing (the production of aerogenesis element 17 around 162 outside of contact in dynamic striking contact body 161 Compression ring) groove structure.The structure of above-mentioned petal-shaped elastic contact blade is interpreted as referring to shown in Fig. 5 A or Fig. 5 B as any one Include the structure of multiple elastic conducting strips that there is a longitudinal profile groove between any two.

In conjunction with Fig. 5 A, Fig. 5 B, moves striking contact body 161 and be equipped with multiple open-works 1611, these open-works 1611 are preferably Centered on the contact 162, central symmetry state is formed.Since dynamic striking contact body 161 is conductively connected and is tied with its periphery Conjunction is fixed at the port of cavity 123 of conducting rod 12, these open-works 1611 not only can swimmingly export the air (contact of compression The holes that 162 centers are inserted into for quiet striking contacts 114 also can air guide), 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 pure insulation with the first contact 111 Fracture, while realizing the function of on-load switch and disconnecting switch.And it should be appreciated by those skilled in the art that pure insulation fracture is Between finger static contact and moving contact in open position, between dynamic and static contact other than institute's inflatable body, any other object is not bridged Matter；Now some products have bridges in the art, and the material for connecing object is mainly made of insulating materials, as epoxy resin, Polytetrafluoroethylene (PTFE), makrolon etc..

The representative specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is simultaneously Not limited to this, any one skilled in the art can think easily in the technical scope that the utility model discloses The change or replacement arrived, should be covered within the scope of the utility model.

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 is realized the combined floodgate of first conducting end and the second conducting end by the reciprocating motion of the conducting rod or is divided Lock；It is characterized in that：

First conducting end includes the first contact, and the conducting rod is to first conducting end movement and when contacting, Neng Gouyu First contact is conductively connected；

Second conducting end includes a piston and the second contact；Second contact is set to 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 Be contained in the cavity, second contact is then contacted in the outer surface of the conducting rod, second contact be moved through The conducting rod in journey keeps electrical connection；The piston constitutes the gas held space of a variable-volume with the cavity；

The conducting rod includes towards the first end of first conducting end, and towards the second end of second conducting end； The first end of the wherein described conducting rod sets that there are one the air current spray nozzle that is connected to the gas held space and an aerogenesis members Part；

The conducting rod is moved to close to the direction of first conducting end to be conductively connected with first conducting end, reaches conjunction Lock state, at this time the gas held spatial volume become larger；

The conducting rod is moved to the direction far from first conducting end and is detached with being led with first conducting end, reaches separating brake State, the aerogenesis element receive the arc energy generated when the conducting rod is detached with first contact, discharge arc extinguishing gas Body is to extinguish electric arc；Simultaneously the gas held space volume-diminished and generate air-flow, from the air current spray nozzle spray 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 set to the top of the air current spray nozzle, for spraying air-flow；The air current spray nozzle is with its bottom It is incorporated in the first end of the conducting rod, 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 set to the institute of air current spray nozzle It states in cavity.

4. arc-suppressing load switch according to claim 1 or 2 or 3, it is characterised in that：First conducting end further includes one A 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 connect 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 It is electrically connected with the conducting rod；The petal-shaped elastic contact blade forms ring-type, can encircle in the outside of the quiet striking contact, The quiet striking contact described in separating brake moment is set still to keep being conductively connected with the dynamic striking contact, electric current can be from conductive end loops It is transferred in striking contact circuit.

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 inner wall 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 Aerogenesis ring made of work, the aerogenesis ring set are through the outside of the petal-shaped elastic contact blade 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 equipped with several Open-work, the position of the open-work form central symmetry centered on the petal-shaped elastic contact blade.

9. arc-suppressing load switch according to claim 3, it is characterised in that：The air current spray nozzle further includes a throat, The throat is located at the lower section of the mouth and is equipped at least one air-flow guide groove for connecting the cavity, the throat, make by The air-flow that mouth sprays generates spiral effect.

10. arc-suppressing load switch according to claim 9, it is characterised in that：The air-flow guide groove is round, 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 is set as inclined-plane in the position being connected to below the mouth, which 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 set to 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 It states and forms the gap between piston；Second contact is encircled by its inside elastic force in the outside of the conducting rod, this is made Conducting rod is conductively connected with second contact holding always 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 a plum blossom contact, the spring touch finger of annular or a conductive ring set for including multiple claws being longitudinally extended.

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 5, 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 outer diameter of quiet striking contact, and is made of the copper tungsten material of resistance to electric arc.