CN207165455U - Load switch equipment - Google Patents

Abstract

Power equipment technology is the utility model is related to, discloses a kind of load switch equipment, including casing and on-load switch, casing is airtight box；On-load switch includes the first conducting end, the second conducting end and conducting rod, conducting rod first end can be conductive with the first conductive end in contact or separates insulation, the end of conducting rod second movably keeps conductive contact with the second conducting end, the conducting rod moves along a straight line between contact is conductive or separation is insulated, and realizes the combined floodgate or separating brake of the on-load switch；There is pure insulation fracture between gate-dividing state, the conducting rod first end and first conducting end；The utility model embodiment provides a kind of load switch equipment of novel structure, and it is arranged in the closed gas tank of miniaturization, and the arc-extinguishing medium used is environmentally friendly gas.

Description

Load switch equipment

Technical field

Power equipment technology is the utility model is related to, one kind is related in particular to and has two kinds of compressed-air arc-extinguishing and aerogenesis arc extinguishing concurrently The medium voltage load switch equipment of arc quenching method.

Background technology

In 12kV medium voltage load switch equipment currently on the market, can realize miniaturization mainly has two kinds of structures：It is a kind of It is the form using SF6 (sulfur hexafluoride) gas arc extinguishing, as Chinese patent CN101425421A discloses this technology, but SF6 gases are non-environmental protection gas, and its development is restricted；Another kind is the form with vacuum extinction, such as Chinese patent CN101800137B discloses this technology, but cost is very high does not also have isolation fracture.

Air pressing type and the pressure load switch equipment of air-generating structure at present, occurred in the form of open type, it Volume is big, exposed easily protected from environmental in atmosphere, can not meet non-maintaining requirement.

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, it is impossible to effectively reduce into This.

The content of the invention

In order to solve the above technical problems, mesh of the present utility model, which is to provide one kind, has compressed-air arc-extinguishing and aerogenesis arc extinguishing two concurrently The load switch equipment structure of the medium voltage load switch equipment of kind arc quenching method, improves arc extinction performance, reduces cost.

Second purpose of the present utility model is to provide a kind of on-load switch of the striking structure of contact terminal with optimization and set It is standby, the ability of electric current transfer when improving drop-out current.

3rd purpose of the present utility model is to provide a kind of load switch equipment of the nozzle arrangements with optimization, energy Enough optimization airflow flow fields, strengthen arc extinguishing ability.

For achieving the above object, the utility model embodiment provides a kind of load switch equipment, including casing and negative Lotus is switched, and the on-load switch is arranged in the casing, and the casing is airtight box；The on-load switch is led including first Electric end, the second conducting end and conducting rod, the conducting rod first end can be conductive with the first conductive end in contact or separates insulation, described The end of conducting rod second movably keeps conductive contact with the second conducting end, exhausted in contact conduction or separation by the conducting rod Intermarginal linear motion, realize the combined floodgate or separating brake of the on-load switch；In gate-dividing state, the conducting rod first end and described the There is pure insulation fracture between one conducting end；A fixed piston, the piston nose are set with the end of conducting rod second Be formed as arc extinguishing to the space inside the conducting rod to calm the anger space；Led with one towards described first in arc extinguishing space of calming the anger The nozzle connection at electric end, the space that makes to calm the anger is moved after conducting rod separation and is diminished, described the when producing air-flow to extinguish separating brake Caused electric arc between one conducting end and the conducting rod first end.

According to the utility model embodiment, wherein being additionally provided with earthed switch in the casing, the earthed switch is by one Individual earthing switch operating mechanism control, the earthed switch can be with first conducting end or the second conductive end in contact or disconnection； The casing is additionally provided with a load switch operation mechanism, and the load switch operation mechanism drives the on-load switch to close a floodgate Or separating brake, interlock is provided between the load switch operation mechanism and the earthing switch operating mechanism, by described Locking device, which controls, selects implementation contact conducting between the on-load switch and the earthed switch.

According to the utility model embodiment, wherein the conducting rod is a hollow structure with cavity；The conduction Bar is installed on the gap between the second conducting end and piston, and the piston is contained in the cavity, and described second is conductive Second contact at end then contacts to be begun in the outer surface of the conducting rod, second contact with the conducting rod in motion process Electrical connection is kept eventually；The piston forms the gas held space of a variable-volume with the cavity；The conducting rod includes court To the first end of first conducting end, and the second end towards second conducting end；The first of wherein described conducting rod End is provided with an air current spray nozzle connected with the gas held space and an aerogenesis element；The conducting rod is to close to institute The direction movement of the first conducting end is stated to be conductively connected with first conducting end, reaches "on" position, now the gas holds Spatial volume of receiving becomes big and suction gas；The conducting rod is to the direction movement away from first conducting end with described first Conducting end leads separation, reaches gate-dividing state, and the aerogenesis element is received when the conducting rod separates with first contact and produced Arc energy, release arc extinguishing gases are to extinguish electric arc；Simultaneously the gas held space volume-diminished and produce high pressure gas Stream, sprayed from the air current spray nozzle to extinguish electric arc.

According to the utility model embodiment, wherein the conducting rod end also has aerogenesis element close to nozzle location, The aerogenesis element is extinguished electric arc by arcing release arc extinguishing gases.

According to the utility model embodiment, wherein the air current spray nozzle of the on-load switch includes a hollow cavity and one Individual mouth, the mouth is located at the top of the air current spray nozzle, for spraying air-flow；The air current spray nozzle is incorporated in its bottom The first end of the conducting rod, the cavity is between the top and bottom of the air current spray nozzle.

According to the utility model embodiment, wherein the conducting end of the on-load switch first also include 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； The end of the quiet striking contact is than first contact closer to the conducting rod；The first end of the conducting rod is additionally provided with one The individual dynamic striking contact being connected with the quiet striking contacts mates, the dynamic striking contact are conductively connected with the conducting rod.

According to the utility model embodiment, wherein the on-load switch, which moves 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 is led with described Electric pole electrically connects；The petal-shaped contact 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.

According to the utility model embodiment, wherein the on-load switch moves the bottom that striking contact is located at the cavity of the nozzle Portion, and the aerogenesis element is located between the inwall of the nozzle and the dynamic striking contact.

According to the utility model embodiment, wherein the interlock includes on-load switch locking plate, interlock plate and connect Ground switch interlock piece, the on-load switch locking plate are coupled to the load switch operation mechanism；The earthed switch locking plate It is coupled to the earthing switch operating mechanism；The interlock plate is movably spacing in the on-load switch locking plate and ground connection Between switch interlock piece, the on-load switch locking plate and earthed switch locking plate are equipped with the engaging towards the interlock plate Portion.

According to the utility model embodiment, wherein the on-load switch locking plate holding section is a groove, and the groove Seamlessly transitted with the on-load switch locking plate outward flange；The earthed switch locking plate holding section is a groove, and this is recessed Groove seamlessly transits with the earthed switch locking plate outward flange；The interlock plate is opened with the on-load switch locking plate and ground connection There is gap, the gap is single-ended more than the interlock plate from the gap of groove abjection, but is less than the interlocking between association locking plate Plate both-end is from the gap that groove is deviate from.

According to the utility model embodiment, wherein the load switch operation mechanism includes drive shaft with the connecting lever that insulate, institute Drive shaft is stated to stretch on the outside of the casing；Described insulation connecting lever one end is fixedly connected on the drive shaft；The insulation connecting lever Other end connection is rotatably connected to the conducting rod.

According to the utility model embodiment, wherein the piston offers the axial long hole laterally penetrated, the insulation is turned Linked between arm and the conducting rod by a bearing pin, the bearing pin can move in the axial long hole；The insulation connecting lever On open up the spacing bearing pin of an elongated hole.

Advantageous effects of the present utility model include：It is new for the problem above of existing market switchgear, this practicality Type embodiment provides a kind of switchgear of novel structure, and it is arranged in the closed gas tank of miniaturization, the arc-extinguishing medium used It is the environmentally friendly gas of non-SF6 gases.

The on-load switch of the utility model embodiment combines air pressing type structure and air-generating clever structure, improves arc extinguishing Performance, cost is reduced, and realize that product minimizes.

Brief description of the drawings

Fig. 1：The load switch equipment of the utility model embodiment is in the sectional view of open position；

Fig. 2：The earthed switch of the utility model embodiment is in the sectional view of closing position on-load switch open position；

Fig. 3：The on-load switch of the utility model embodiment is in the sectional view of closing position grounding switch tripping position；

Fig. 4：The front view of the earthed switch corresponding operating mechanism of the on-load switch of the utility model embodiment；

Fig. 5：The side view of the load switch equipment structure arrangement of the utility model embodiment；

Fig. 6：The load switch equipment on-load switch of the utility model embodiment and the section view of earthed switch integrated arrangement Figure；

Fig. 7 is that the arc-suppressing load switch of the utility model embodiment is in the sectional view of closing position；

Fig. 8 is that the arc-suppressing load switch of embodiment illustrated in fig. 7 is in the sectional view of open position；

Fig. 9 is the conducting rod of embodiment illustrated in fig. 7 switch and the structural representation of the second conducting end released state；

Figure 10 is the utility model embodiment interlock operating principle schematic diagram one；

Figure 11 is the utility model embodiment interlock operating principle schematic diagram two；

Figure 12 is the utility model embodiment interlock operating principle schematic diagram three.

Embodiment

Embodying the exemplary embodiments of the utility model features and advantages will describe in detail in the following description.It should be understood that It is that the utility model can have various changes in different embodiments, it does not all depart from the scope of the utility model, and Explanation therein and accompanying drawing inherently are illustrated as being used, and are not used to limit the utility model.

Referring to figs. 1 to shown in 6, the utility model embodiment provides a kind of load switch equipment, mainly includes gas tank 9 and gas On-load switch in case 9.Gas tank 9 is airtight box in the present embodiment, and gas tank 9 includes upper sealing plate 91, left shrouding 92, lower shrouding 93rd, right shrouding 94, preceding shrouding 95 and rear shrouding 96, these shroudings are by assembling or being welded to form an independent sealing space. Gas tank 9 belongs to the closed gas tank of miniaturization in the utility model embodiment, and it is non-SF6 gas that gas tank 9, which fills the arc-extinguishing medium used, The environmentally friendly gas of body, such as dry air, nitrogen, carbon dioxide are free of fluorine element environmental protection gas.

There can be a framework 2 in gas tank 9 with choice arrangement, on-load switch etc. can be positioned or fixed on inner frame 2.Frame Frame 2 can be by side plate, beam slab by assembling or being welded to form a tower structure supporter.Those skilled in the art should understand that , framework 2 can be by multiple choices and embodiment, not using schematic construction in scheming as limitation.

In specific embodiment, include on-load switch 1 and earthed switch 3 in gas tank 9.In the utility model implementation process, bear Lotus switch operating mechanism 7 can switch 1 rotary motion by operating shaft 71 come driving load, realize the function of dividing, close, earthed switch Operating mechanism 8 can drive the rotary motion of earthed switch 3 by operating shaft 72, realize separating brake, the function of closing a floodgate, be grounded during combined floodgate The movable contact spring of switch 3 can form earth-return circuit with the second conductive end in contact of on-load switch 1.

In specific embodiment, arc-suppressing load switch 1 includes the first conducting end 11, the second conducting end 13, one is transported by driving The insulation connecting lever 14 that dynamic conducting rod 12 (see Fig. 3) and driving conducting rod 12 moves up and down., can by the motion of conducting rod 12 Electrically conduct reaching between the first conducting end 11 and the second conducting end 13 or disconnect, to realize the behaviour of the switch closing and switch opening of switch Make.

Radome 116 and radome 139 are respectively provided with the first conducting end 11 and the second conducting end 13, to press original Manage to improve the electric field between the fracture of on-load switch 1, radome selection here is made using conductive material, specifically chosen with metal material Material is made, and radome 116 and radome 139 leave opening, for setting conducting rod 12.Set radome to improve load to open Close three it is alternate and relatively between dielectric level, with meet miniaturization the needs of.

In specific embodiment, end cable cone 51 and lower end cable cone 54 are also provided with gas tank 9, will by upper end bus Upper end cable cone 51 and the first conducting end 11 connect, and lower end cable cone 54 and the second conducting end 13 are then by lower end bus bar 52 Connect, form galvanic circle.

First conducting end 11 is fixed on insulating base 81, plum blossom contact therein can under spring force with conduction The reliable contacts of bar 12, formed can flexible motion galvanic circle；The piston rod 134 coordinated with conducting rod 12 can be fixed on absolutely On the insulating base 83 of the downside of edge pedestal 81, the geo-stationary of 83 and second conducting end of insulating base 13.

Fig. 7 is that the arc-suppressing load switch of the utility model embodiment is in the sectional view of closing position；Fig. 8 is shown in Fig. 7 The arc-suppressing load switch of embodiment is in the sectional view of open position；Fig. 9 is the conducting rod and second of embodiment illustrated in fig. 7 switch The structural representation of conducting end released state.

As Figure 7-9, arc-suppressing load switch includes the first conducting end 11, the second conducting end 13 (see Fig. 9) 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. 7 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. 8 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. 7 and Fig. 9, 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, piston rod base 135 is fixed on insulating base 83, or is integrally formed with insulating base 83.

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 fitted seal circle 1342 of bar 134 collectively constitutes 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 fig. 7, 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 9, the second contact 131 is located on the outside of piston rod 134, and formed therebetween One gap, and the gap is just interposed therebetween for a conducting rod 12, now the outer wall of the second end 122 of conducting rod 12 is by the second contact 131 encircle and reach and are conductively connected.

In conjunction with Fig. 7 to Fig. 9 structure, conducting rod 12 actually one it is hollow, there is the tubular metal of a cavity 123 Part, conducting rod 12 are conductive.Its cavity 123 can stored air.Conducting rod 12 is sheathed on the outside of piston rod 134, and lives Sealing ring 1342 on stopper rod 134 can be just in close contact with the internal face of conducting rod cavity 123, realized sealing effectiveness, made cavity The gas held SPACE V of a variable-volume is formed in 123 positioned at the part above of piston rod 134.In other words, piston rod 134 One end with sealing ring 1342 in fact forms first piston structure, and the piston is accommodated in cavity 123, available for close Envelope and compressed gas.Piston rod 134 can also offer the axial long hole (see Fig. 1 to illustrated in Figure 3) laterally penetrated, and insulate connecting lever Linked between 14 and conducting rod 12 by a bearing pin, the bearing pin can move in the axial long hole；Opened on insulation connecting lever 14 If spacing bearing pin of an elongated hole.

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 is moved up and down, and during conducting rod 12 moves, it is slided with respect to the second contact 131, but because the second contact 131 is A kind of conductive ring set with inside elastic force, therefore the second contact 131 can be closely against conducting rod 12 by its inside elastic force Outside, 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, realize spirit Campaign-styled connection living.

With reference to shown in Fig. 8, Fig. 9, the first end 121 of conducting rod 12, specifically one is provided with the first end end of conducting rod 12 Individual air current spray nozzle 15 and an aerogenesis element 17.Wherein air current spray nozzle 15 includes a cavity 151 and a mouth 152, empty Chamber 151 is located at the bottom of air current spray nozzle 15, can keep in a certain amount of accumulation gas, wherein also including arc extinguishing caused by aerogenesis element 17 Gas.The bottom of air current spray nozzle 15 is fixedly connected with the first end 121 of conducting rod 12, and is formed gas with gas held SPACE V and connected Logical state.Mouth 152 is located at the top of air current spray nozzle 15, and upwardly extends certain length, sprays high velocity air for pressure accumulation.Production Gas element 17 is solid-state components made of the material of releasable arc extinguishing gases under the high heat effect of high temperature.Preferably, aerogenesis element is allowed 17 are arranged in the cavity 151 of air current spray nozzle 15.The purpose being so designed that is the high temperature high fever that electric arc caused by separating brake is brought, The gasification of the surface of aerogenesis element 17 is set to discharge arc extinguishing gases, arc extinguishing gases are kept in cavity 151, by from conducting rod inner bore cavity The high-voltage high-speed air stream squeezed out in 123 rushes band, ejects, contributes at the mouth 152 of air current spray nozzle 15 in the lump Improve arc extinguishing efficiency.Therefore, aerogenesis element 17 is arranged on inside the cavity 151 of air current spray nozzle 15, can farthest improve production The ability and utilization ratio of gas.For example, aerogenesis element 17 selection be one kind can made of polytetrafluoroethylene (PTFE) solid-state components.

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 7, 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. 7, Fig. 8.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 the first contact 111 is available for pair that conducting rod 12 stretches into Connect space.A quiet striking contact 114 is also fixed with first contact base 112, the quiet striking contact 114 is arranged on first and touched First 111 inner side, the second end of the quiet contact 111 of striking contact 114 to the first is more on the lower (closer to conducting rod 12).This is quiet to draw Arcing contact 114 is fixed and is conductively connected the first contact base 112, to form blow-out circuit.Quiet striking contact 114 can be from conducting rod 12 Penetrated at the mouth 152 of the air current spray nozzle 15 of first end, until the contact 162 with the dynamic striking contact positioned at the lower section of mouth 152 Connection.

The making process of the arc-suppressing load switch 1 is：Switch mediation, which is closed a floodgate, to be indicated, operates connecting lever 14, band moving conductive rod 12 Move up, now the volume of gas held SPACE V becomes larger and air is sucked constantly at mouth 152；With conducting rod 12 enter 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 tightly surrounds The outer wall of conducting rod 12, which forms, to be reliably conductively connected, until moving to range on conducting rod 12, now gas held is empty Between V volume be in maximum rating (such as Fig. 7 Vmax).At the same time, the quiet striking contact 114 on the first contact base 112 from 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 1 is：Switch is connected to separating brake instruction, and operation connecting lever 14 is whole with moving conductive rod 12 Body moves down (Fig. 8 right side arrows signified), now due to piston rod 134 be it is motionless (piston rod 134 play compressed gas and The effect for guiding conducting rod 12 to move along a straight line), and the cavity 123 of the sealing ring 1342 of the first end of piston rod 134 and conducting rod 12 Inwall causes gas held SPACE V constantly to diminish (such as Fig. 8 Vmin), and form high speed and high pressure gas to extinguish production in sealing Raw electric arc.At the same time, set aerogenesis element 17 in the cavity 151 of air current spray nozzle 15, it is high by the high temperature of separating brake electric arc Thermal energy influences, and the gasification of its surface produces a large amount of arc extinguishing gases, accumulates and is temporarily stored in cavity 151 first and (avoids gas leak Pollute 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 conjunction with Fig. 1 to illustrated in Figure 3, the front end of piston rod 134 is also embedded with bolster 138, and the bolster 138 can be with Air current spray nozzle 15 and the activity of dynamic striking contact 16 coordinate, and the upper end of bolster 138 reduces to form round end, in gate-dividing state, bolster 138 can be carried out with throat 153 it is in sealing contact, separating brake act when, bolster 138 can gas pressure effect under for separating brake action carry For buffering.

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.

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..

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.

Such as Fig. 1 to Fig. 6 and reference picture 11 is to Figure 12, is gone back between load switch operation mechanism 7 and earthing switch operating mechanism 8 Selection is provided with interlock 41 to realize following interlock：Earthed switch 3 can not close a floodgate when on-load switch 1 closes a floodgate, and be grounded On-load switch 1 can not close a floodgate when switch 3 closes a floodgate.

Such as Figure 10, when on-load switch and earthed switch are at open position, on-load switch locking plate 411 and 413 Recess is both facing to interlock plate 412, and without interlock connection, on-load switch or earthed switch can be carried out closing operation, such as Figure 11, When on-load switch closes a floodgate, the recess of on-load switch locking plate 411 rotates an angle, interlock plate 412 is pressed downward, interlock plate 412 lower end, which is withstood on, forms interlocking on earthed switch locking plate 413, now earthed switch locking plate 413 can not rotate again, also It is that earthed switch can not carry out closing operation, such as Figure 12, when earthed switch closes a floodgate, 413 recess rotates an angle, will interlock Plate 412 is pressed upwards, and the upper end of interlock plate 412, which is withstood on, forms interlocking on on-load switch locking plate 411, now on-load switch locking plate 411 can not rotate again, that is, on-load switch can not carry out closing operation.

For the problem above of existing market switchgear, the utility model provides a kind of switchgear of novel structure, It is arranged in the closed gas tank of miniaturization, and the arc-extinguishing medium used is the environmentally friendly gas of non-SF6 gases；The utility model load Switch combines air pressing type structure and air-generating clever structure, improves arc extinction performance, reduces cost, and realizes that product minimizes.

More than, the only representational embodiment of the utility model, but the scope of protection of the utility model not office It is limited to this, any one skilled in the art can readily occur in the technical scope that the utility model discloses Change or replacement, it should all cover within the scope of protection of the utility model.

Claims (10)

1. a kind of load switch equipment, including casing and on-load switch, the on-load switch are arranged in the casing, its feature It is：The casing is airtight box；

The on-load switch includes the first conducting end, the second conducting end and conducting rod, and the conducting rod first end can be led with first Electric end in contact is conductive or separation insulation, the end of conducting rod second movably keep conductive contact with the second conducting end, passed through The conducting rod moves along a straight line between contact is conductive or separation is insulated, and realizes the combined floodgate or separating brake of the on-load switch；In separating brake State, there is pure insulation fracture between the conducting rod first end and first conducting end；

It is set with a fixed piston in the end of conducting rod second, the space shape inside the piston nose to the conducting rod Calmed the anger space as arc extinguishing；Arc extinguishing space of calming the anger connects with a nozzle towards first conducting end；Sub-switching operation In, the space that makes to calm the anger is moved after conducting rod separation and is diminished, in first conducting end and institute when producing air-flow to extinguish separating brake State caused electric arc between conducting rod first end.

2. load switch equipment according to claim 1, it is characterised in that：Earthed switch is additionally provided with the casing, The earthed switch is controlled by an earthing switch operating mechanism, and the earthed switch can be led with first conducting end or second Electric end in contact or disconnection；The casing is additionally provided with a load switch operation mechanism, the load switch operation mechanism driving The on-load switch closes a floodgate or separating brake, and interlocking is provided between the load switch operation mechanism and the earthing switch operating mechanism Device, controlled by the interlock and implementation contact conducting is selected between the on-load switch and the earthed switch.

3. load switch equipment according to claim 1, it is characterised in that：The conductive boom end is close to nozzle location Also there is aerogenesis element, the aerogenesis element is extinguished electric arc by arcing release arc extinguishing gases.

4. load switch equipment according to claim 3, it is characterised in that：The air current spray nozzle of the on-load switch includes one Individual hollow cavity and a mouth, the mouth is located at the top of the air current spray nozzle, for spraying air-flow；The air-flow spray Mouth is incorporated in the first end of the conducting rod with its bottom, and the cavity is between the top and bottom of the air current spray nozzle.

5. load switch equipment according to claim 1, it is characterised in that：The conducting end of on-load switch first also includes One the first contact base and a quiet striking contact, first contact and the quiet striking contact it is fixed and be conductively connected in First contact base；The end of the quiet striking contact is than first contact closer to the conducting rod；The conducting rod First end be additionally provided with a dynamic striking contact being connected with the quiet striking contacts mates, the dynamic striking contact is led with described Electric pole is conductively connected.

6. load switch equipment according to claim 5, it is characterised in that：The on-load switch, which moves striking contact, includes one Individual 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 connects with the conducting rod；The petal-shaped contact forms ring-type, can encircle in the quiet striking contact Outside, make still to keep being conductively connected in quiet striking contact described in separating brake moment and the dynamic striking contact.

7. load switch equipment according to claim 2, it is characterised in that：The interlock interlocks including on-load switch Piece, interlock plate and earthed switch locking plate, the on-load switch locking plate are coupled to the load switch operation mechanism；It is described Earthed switch locking plate is coupled to the earthing switch operating mechanism；The interlock plate is movably spacing in the on-load switch Between locking plate and earthed switch locking plate, the on-load switch locking plate and earthed switch locking plate are equipped with towards institute State the holding section of interlock plate.

8. load switch equipment according to claim 7, it is characterised in that：The on-load switch locking plate holding section is one Individual groove, and the groove seamlessly transits with the on-load switch locking plate outward flange；The earthed switch locking plate holding section is One groove, and the groove seamlessly transits with the earthed switch locking plate outward flange；The interlock plate and the on-load switch There is gap, the gap is more than between the single-ended abjection from groove of the interlock plate between locking plate and earthed switch locking plate Gap, but it is less than the interlock plate both-end from the gap that groove is deviate from.

9. load switch equipment according to claim 4, it is characterised in that：The load switch operation mechanism includes driving Axle is stretched into the connecting lever that insulate, the drive shaft on the outside of the casing；Described insulation connecting lever one end is fixedly connected on the driving Axle；The insulation connecting lever other end connection is rotatably connected to the conducting rod.

10. load switch equipment according to claim 9, it is characterised in that：The piston offers the axle laterally penetrated To elongated hole, linked between the insulation connecting lever and the conducting rod by a bearing pin, the bearing pin can be in the axial long hole It is mobile；The spacing bearing pin of an elongated hole is opened up on the insulation connecting lever.