CN205810672U - Direct acting type three-stations load switch - Google Patents

Abstract

Direct acting type three-stations load switch of the present utility model uses single-phase separation structure, and shell is ground connection aluminum alloy casing, it is achieved the grounding shell in product running is tangible, the most affected by environment, non-maintaining, and security reliability is high；The phase insulation problem of tradition on-load switch is changed into Insulation Problems relatively by the linear type three-stations load switch of the most single-phase layout, and insulation gas consumption is less；Linear type three-stations load switch uses straight line structure, on-load switch is arranged in one end, earthed switch is arranged in the other end, has three station functions of combined floodgate, separating brake and ground connection, and same operating mechanism is successively performed, interlocking fit is simple, reliability is high, and overall volume is less, solves that voltage levels on-load switch overall dimensions is big, Making mold is difficult, installing, safeguard inconvenience, relatively fault is easily extended to the series of problems such as phase insulation fault.

Description

Direct acting type three-stations load switch

Technical field

This utility model relates to a kind of direct acting type three-stations load switch, is applied to high-voltage switch gear electrical equipment.

Background technology

On-load switch is a kind of switchgear with simple arc-control device, it is possible in normal running conditions ShiShimonoseki, loop Close, carry and drop-out current, and under the abnormal condition (such as short circuit) of regulation, carry opening of abnormal current at the appointed time Close device.In engineering actual motion, on-load switch be middle pressure ring net complete set of equipments mainly comprise parts, and along with country is to electricity In net, the requirement of the looped network controller switching equipment of power supply-distribution system improves constantly, and the consumption of ring main unit is increasing；Ring main unit simultaneously Applied voltage grade is more and more higher, develops to 40.5 kilovoltage grades in particular with ring main unit product, in order to meet absolutely Edge performance requirement, the phase insulation distance of on-load switch also becomes much larger.Use gas-insulated and arc extinguishing load currently on the market Switch mostly is the integral structure that three-phase is assemblied in a shell, and on the one hand cast manufacture mould volume becomes very big, insulation The gas consumption of gas is the most, and assembling and manufacturing process are more complicated；The most three-phase integrated on-load switch structure is worked as Being easy to be extended to phase-to phase fault when causing single-phase fault, fault harm degree is by extended；And traditional gas-insulated is born Lotus switch outer surface is easily by air, dust corrosive effect, and attendant needs outer surface to carry out periodic maintenance cleaning, otherwise, Easily cause the insulation degradation of equipment, accidents caused；There is the load using epoxy resin sealing vacuum interrupter currently on the market Switch, although this type of structural volume has diminished, but this kind of on-load switch is limited to the structural shape of vacuum interrupter, Zhi Nengman Two station state requirements of foot switch closing and switch opening, in engineering operation, if on-load switch requires possess combined floodgate, separating brake, connect Three stations on ground, in addition it is also necessary to matching design single gas-insulating type earthed switch, so cause the population structure of switchgear Complex, volume is relatively big, and the interlocking fit between on-load switch and earthed switch is loaded down with trivial details.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of direct acting type three-stations load switch, can be fine Voltage levels on-load switch overall dimensions is big, Making mold is difficult in ground solution, installs, safeguards inconvenience, and relatively fault is held Easily it is extended to the series of problems such as phase insulation fault, requires simple in construction, easy for installation, reliable, split-phase layout simultaneously, Insulating properties are reliable and consumption of materials is low, can ensure that the safety of Operation and Maintenance personnel.

Direct acting type three-stations load switch of the present utility model, includes body, operating mechanism, mounting bracket, body, behaviour It is fixedly mounted in mounting bracket as mechanism；Body housing is tubular construction, and rear and front end is respectively by inlet wire pole, capping envelope Close, internal by piston plate, guide holder, outlet pole, be divided into tetra-air cavitys of I, II, III, IV, piston plate is the most through before and after having Passage, air cavity I, II interconnect；Inlet wire pole is provided with static contact, and piston plate is provided with moving contact component, outlet pole Post is provided with conductive seat and Interposer contact, capping is provided with grounding contact；It is installed with insulation on rear side of moving contact component to draw Bar, insulated tension pole is connected with operating mechanism after sequentially passing through the grounding contact of guide holder, the Interposer contact of outlet pole, capping, And can be driven axially translated by operating mechanism；Described direct acting type three-stations load switch has three operating positions, closes a floodgate Position, open position and earthing position, when closing position, moving contact turns on the direct grafting of static contact, and moving contact, centre are touched Head is turned on by the conduction loop bar of insulated tension pole leading portion, and grounding contact, Interposer contact disconnect；When open position, moving contact, quiet Contact disconnects, and grounding contact, Interposer contact also disconnect；When earthing position, static contact, moving contact disconnect, and moving contact, ground connection are touched Turned on by conduction loop bar between Tou.

Described shell is metal material, by the first paragraph shell of fixing inlet wire pole, second segment shell, fixing outlet pole The 3rd section of shell and capping composition, each section is composed of a fixed connection by ring flange and can be grounded the cylindrical outer casing of function.

Described inlet wire pole includes inlet wire cable cone, inlet wire conductor, static contact radome, pressure release passage, inlet wire conductor warp Poured with epoxy resin is connecing first paragraph enclosure, and the epoxy resin after moulding by casting is inlet wire cable cone；Inlet wire conductor is The conductor material with right-angle structure is made, and horizontal position end is equipped with static contact and static contact radome, static contact radome Can horizontally slip vertically, inside is additionally provided with back-moving spring；Being provided with pressure release passage on inlet wire pole, pressure release passage has The wall of thinner thickness.

Moving contact component is installed on piston plate centre, and moving contact component is internal and rear end is respectively provided with the most through leading to Pore, is provided with the guide ring of loop configuration between piston plate periphery and grounding shell inwall, left side is provided with moving contact shielding Cover cover is loaded on outside moving contact component, and is provided with spout.

Described guide holder is provided centrally with catch jacket, and catch jacket rear inside has restriction protrusion, conductive seat leading portion appearance Mask limited location groove, in catch jacket inner side limiting-position projection can snap in conductive seat outer surface stopper slot, restricted guidance seat moves；Claw Being provided with guideway in set, guideway rear end has tapered slope and coordinates with the claw inner surface of catch jacket back segment, guides Axle sleeve tapered slope can strut the claw of catch jacket back segment so that outside catch jacket inner side limiting-position projection can be upwardly away from conductive seat Surface stopper slot；Guideway and conduction loop bar between be set with back-moving spring, back-moving spring two ends by guideway inside Step and conductive seat front end are spacing；Being additionally provided with cycle spring between catch jacket and guideway, cycle spring two ends are by guiding Step in the step of axle sleeve front end outer side and catch jacket is spacing；Limited block it is installed with, on conduction loop bar on conduction loop bar Limited block can be driven to promote guide holder axially translated, between guide holder periphery and outer casing inner wall, be provided with leading of loop configuration Xiang Huan.

Described outlet pole includes outlet cable cone, conductive seat, outlet conductor, and conductive seat, outlet conductor are by asphalt mixtures modified by epoxy resin Fat moulding by casting in the 3rd section of shell is outlet cable cone；Conductive seat is arranged at the centre of the 3rd section of shell, and leading portion has Sleeve shaped structure is had to forward extend out outlet cable cone；Guideway, catch jacket are set in the sleeve shaped structure of conductive seat leading portion.

Described cap central position is provided with grounding contact, has passage, back-end closure inside grounding contact；Outside capping Side is additionally provided with outlet and connects enclosed valve, earthing bar respectively.

Described insulated tension pole leading portion is provided with conduction loop bar and moving contact component and fixes and be connected, and back segment is provided with pull bar and behaviour Make mechanism to connect, be additionally provided with watchband-shaped contactor and be installed between the sleeve shaped structure of conductive seat leading portion and conduction loop bar；Conductive sleeve Bar, insulated tension pole, pull bar have hollow structure and interconnect formation air vent channel, bar wall also has pore and body interior I, Tetra-air cavitys of II, III, IV communicate, and air vent channel front end connects with moving contact component passage, back-end closure.

The insulation gas of one of sulfur hexafluoride, drying nitrogen it is filled with in internal tetra-air cavitys of I, II, III, IV of described body 1 Body；By the air vent channel above insulated tension pole, conduction loop bar and piston plate, moving contact component, grounding contact between air cavity Passage form the air cavity that is interconnected, piston plate, guide holder under insulated tension pole drives axially translated can change I, II, III air cavity volume size.

Described mounting bracket includes installing plate, girder, axle bed, fixed plate, and installing plate, girder, axle bed, fixed plate are mutual It is fixedly connected.

Direct acting type three-stations load switch of the present utility model, simple in construction, layout easy for installation, reliable, single-phase, Solve that voltage levels on-load switch overall dimensions is big, Making mold is difficult well, install, safeguard inconvenience, relatively Fault is easily extended to the series of problems such as phase insulation fault；Linear type three-stations load switch is that three-phase split-phase arranges knot Structure, shell is ground connection aluminum alloy casing, it is achieved the grounding shell in product running is tangible, the most affected by environment, exempt from dimension Protecting, security reliability is high；The phase insulation of tradition on-load switch is asked by the linear type three-stations load switch of the most single-phase layout Topic changes into Insulation Problems relatively so that Insulation Problems is easier to solve, and insulation gas consumption is less；Linear type three station is born Lotus switch uses straight line structure, and on-load switch is arranged in one end, and earthed switch is arranged in the other end, has combined floodgate, separating brake With three station functions of ground connection, and being successively performed by same pull bar, operating mechanism, interlocking fit is simple, and reliability is high, overall Small volume.Direct acting type three-stations load switch defines four gas being interconnected by its grounding shell and its content element Chamber；Described air cavity defines, along with the motion of pull bar, the air cavity that volume size is varied as desired in；It is filled with hexafluoro in described air cavity Change sulfur gas or similar insulating gas are as insulation and arc-extinguishing medium, and arc extinction performance is reliable.

Accompanying drawing explanation

Fig. 1 is the top view of direct acting type three-stations load switch of the present utility model；

Fig. 2 is the front view of direct acting type three-stations load switch of the present utility model；

Fig. 3 is direct acting type three-stations load switch of the present utility model sectional view when being in closing position；

Fig. 4 is direct acting type three-stations load switch of the present utility model sectional view when being in open position；

Fig. 5 is direct acting type three-stations load switch of the present utility model sectional view when being in earthing position；

Fig. 6 is direct acting type three-stations load switch of the present utility model local cutaway view Amplified image when being in closing position；

Fig. 7 is direct acting type three-stations load switch of the present utility model local cutaway view Amplified image when being in open position；

Fig. 8 is direct acting type three-stations load switch of the present utility model local cutaway view Amplified image when being in earthing position.

In figure:

1, body 2, operating mechanism 3, mounting bracket 4, inlet wire pole 6, outlet pole 7, capping 13, absolutely Edge pull bar 14, earthing bar 15, enclosed valve 31, installing plate 32, girder 33, axle bed 34, fixed plate 41, enter Line cable cone 42, inlet wire conductor 44, static contact radome 45, pressure release passage 52, piston plate 54, moving contact shielding Cover 55, moving contact component 61, conductive seat 62, outlet cable cone 63, outlet conductor 73, grounding contact 131, lead Electricity loop bar 133, pull bar 135, watchband-shaped contactor 161, guide holder 163, guideway 164, catch jacket 165, multiple Position spring 166, limited block.

Detailed description of the invention

As it can be seen, a kind of direct acting type three-stations load switch, include body 1, operating mechanism 2, mounting bracket 3, this Body 1, operating mechanism 2 are fixedly mounted in mounting bracket 3；Body 1 shell is tubular construction, and rear and front end is respectively by inlet wire pole 4, capping 7 closing, internal by piston plate 52, guide holder 161, outlet pole 6, be divided into tetra-air cavitys of I, II, III, IV, piston The passage that plate 52 is through before and after having, air cavity I, II interconnect；Inlet wire pole 4 is provided with static contact, and piston plate 52 is arranged There are moving contact component 55, outlet pole 6 to be provided with conductive seat 61 and Interposer contact, capping 7 are provided with grounding contact 73；Dynamic tactile Being installed with insulated tension pole 13 on rear side of head assembly 55, insulated tension pole 13 sequentially passes through guide holder 161, the centre of outlet pole 6 Contact, capping 7 grounding contact after be connected with operating mechanism, and can be driven axially translated by operating mechanism；Described direct acting Type three-stations load switch has three operating positions, closing position, open position and earthing position, when closing position, moves Contact turns on the direct grafting of static contact, and moving contact, Interposer contact are turned on by the conduction loop bar 131 of insulated tension pole 13 leading portion, Grounding contact, Interposer contact disconnect；When open position, moving contact, static contact disconnect, and grounding contact, Interposer contact also disconnect； When earthing position, static contact, moving contact disconnect, and are turned on by conduction loop bar 131 between moving contact, grounding contact.

Described shell is metal material, by the first paragraph shell of fixing inlet wire pole 4, second segment shell, fixing outlet pole 3rd section of shell of post 6 and capping 7 composition, each section is composed of a fixed connection by ring flange and can be grounded outside the tubular of function Shell.

Described inlet wire pole 4 includes inlet wire cable cone 41, inlet wire conductor 42, static contact radome 44, pressure release passage 45, enters Line conductor 42 is connecing first paragraph enclosure through poured with epoxy resin, and the epoxy resin after moulding by casting is inlet wire cable cone 41；Inlet wire conductor 42 is that the conductor material with right-angle structure is made, and horizontal position end shields equipped with static contact and static contact Cover 44, static contact radome 44 can horizontally slip vertically, and inside is additionally provided with back-moving spring；Setting is had on inlet wire pole 4 Pressure release passage 45, pressure release passage 45 has the wall of thinner thickness.

Described moving contact component 55 is installed on piston plate 52 centre, before moving contact component 55 inside and rear end are respectively provided with The most through passage, is provided with the guide ring of loop configuration between piston plate 52 periphery and outer casing inner wall, left side is provided with dynamic It is outside that contact shield cover 54 cover is loaded on moving contact component 55, and is provided with spout.

Described guide holder 161 is provided centrally with catch jacket 164, and catch jacket 164 rear inside has restriction protrusion, conductive seat 61 leading portion outer surfaces have stopper slot, and catch jacket 164 inner side limiting-position projection limits in snapping in conductive seat 61 outer surface stopper slot Guide holder moves；Guideway 163 it is provided with, after guideway 163 rear end has tapered slope and catch jacket in catch jacket 164 The claw inner surface of end coordinates, and guideway 163 tapered slope can strut the claw of catch jacket rear end so that catch jacket 164 Inner side limiting-position projection can be upwardly away from conductive seat 61 outer surface stopper slot；It is set with between guideway 163 and conduction loop bar 131 Back-moving spring 165, back-moving spring 165 two ends are spacing by the step inside guideway 163 and conductive seat 61 front end；Catch jacket and Being additionally provided with cycle spring between guideway, cycle spring two ends are by the step of guideway 163 front end outer side and catch jacket Interior step is spacing；It is installed with limited block 166 on conduction loop bar 131, conduction loop bar 131 can drive limited block 166 Promotion guide holder is axially translated, is provided with the guide ring of loop configuration between guide holder 161 periphery and outer casing inner wall.

Described outlet pole 6 includes outlet cable cone 62, conductive seat 61, outlet conductor 63, conductive seat 61, outlet conductor 63 by epoxy resin moulding by casting in the 3rd section of shell be outlet cable cone 62；Conductive seat 61 is arranged in the 3rd section of shell Heart position, leading portion has sleeve shaped structure and forward extends out outlet cable cone 62；Guideway 163, catch jacket 164 are set in conduction The sleeve shaped structure of seat 61 leading portions.

Described capping 7 centre is provided with grounding contact 73, has passage, back-end closure inside grounding contact；Envelope It is additionally provided with outlet outside lid 7 and connects enclosed valve 15, earthing bar 14 respectively.

Described insulated tension pole 13 leading portion is provided with conduction loop bar 131 and moving contact component 55 and fixes and be connected, and back segment is provided with Pull bar 133 is connected with operating mechanism, is additionally provided with watchband-shaped contactor 135 and is installed in sleeve shaped structure and the conduction of conductive seat 61 leading portion Between loop bar 131；Conduction loop bar 131, insulated tension pole 13, pull bar 133 have hollow structure and interconnect formation air vent channel, bar Also having pore I, II, III, IV tetra-air cavitys internal with body 1 on wall to communicate, air vent channel front end leads to moving contact component 55 Pore connects, back-end closure.

The insulation gas of one of sulfur hexafluoride, drying nitrogen it is filled with in internal tetra-air cavitys of I, II, III, IV of described body 1 Body；Between air cavity by the above air vent channel of insulated tension pole 13, conduction loop bar 131 and piston plate 52, moving contact component 55, The passage of grounding contact forms the air cavity being interconnected, piston plate 52, guide holder 161 under insulated tension pole 13 drives vertically Translation can change I, II, III air cavity volume size.

Described mounting bracket 3 includes installing plate 31, girder 32, axle bed 33, fixed plate 34, installing plate 31, girder 32, Axle bed 33, fixed plate 34 connection fastened to each other.

Described body 1 can realize rapid abutting joint with other electrical equipment by inlet wire pole 4, outlet pole 6, and by connecing Ground row 14 carries out grounding connection during ground connection station；Described body 1 is possible not only to meet this utility model by enclosed valve 15 Direct acting type three-stations load switch assembling during evacuation inflation need, it is also possible to for operational monitoring instrument provide installation connect Mouthful.

Direct acting type three-stations load switch embodiment of the present utility model, when on-load switch is in the closing position shown in Fig. 3 When putting, constituting electrical connection loop between inlet wire pole 4, outlet pole 6, electric current enters from the inlet wire conductor 42 of inlet wire pole 4 After, flow through moving contact component 55, watchband-shaped contactor 135, conductive seat 61 successively, after flow out through the outlet conductor 63 of outlet pole 6, The current-carrying job requirement of on-load switch can be met.

First describe from Fig. 3 closing position to Fig. 4 open position each mechanism action process: when closing position, operate machine The actuating unit of structure 2 has been that the energy-stored spring energy storage of actuator is complete；When receiving separating brake instruction, energy-stored spring releases energy Drive the output toggle arm on output shaft the most quickly to rotate, under the traction of output toggle arm the pull bar 133 of body 1 to Right high-speed motion in figure, and pull piston plate 52 and moving contact component 55 simultaneously to move right, moving contact component 55 with enter The inlet wire conductor 42 of line pole 4 separates, and the release of static contact radome 44 internal reset spring promotes static contact radome 44 to reset； The moment that current-carrying part separates may produce electric arc, and piston plate 52 is during moving right, and the volume of air cavity II can quilt Compression, the spout of a part of driven contact shield cover 54 of gas and moving contact component inner vent hole spray and carry out arc extinguishing, one Divide and spray from piston plate 52 passage outside spout.In air cavity II, the release of gas expands to the volume of air cavity I, air cavity I, fall Low operating mechanism drives insulated tension pole 13 to move required operating work, improves the opening velocity of on-load switch, is conducive to The extinguishing of electric arc；Direct acting type three-stations load switch the most of the present utility model is in the open position shown in Fig. 4, inlet wire pole 4, electrically disconnect between outlet pole 6；Electric off-state it is also between outlet pole 6 and earthing bar 14.

Secondly from Fig. 4 open position to Fig. 5 earthing position each mechanism action process: the actuating unit of operating mechanism 2 continues Work, energy-stored spring is in original state, slides along groove in end, pushing drawing rod 133 under the driving of operating mechanism slowly to Moving in right shown in figure, under the drive of conduction loop bar 131, piston plate 52 and upper all of assembly thereof move right together, First contact with the limited block 166 on guide holder 16, and promote limited block 166 to extrude to the right guideway 163, guideway 163 back down catch jacket 164 continues that continuing to the right moves and is enclosed within the outside of conductive seat 61, moves right the most together until reaching figure 4 earthing positions；Air cavity III volume compression in motor process, air-flow passes through piston plate 52, moving contact component 55, motion pull bar 13 Passage and air vent channel flowing, air cavity II constancy of volume, the volume of air cavity I expands, and air cavity III volume diminishes, air cavity IV Volume is unaffected；Now constituting electrically conducting loop between the outlet conductor 63 in outlet pole 6 and earthing bar 14, electric current can With through outlet conductor 63, conductive seat 61, watchband-shaped contactor 135, conducting rod 131, grounding contact 73, last grounded drainage goes out, shape Become the ground state of on-load switch, it is ensured that the safety of Operation and Maintenance personnel.

By above operation, linear type three-stations load switch completes from closing a floodgate to separating brake, by separating brake simple and reliablely Operate to grounding function, it is achieved three station functions of on-load switch, it is ensured that the safety of Operation and Maintenance personnel.Otherwise, linear type three Station load switch can also complete under the driving of operating mechanism from be grounding to separating brake, from separating brake to close a floodgate operation, it is achieved Putting into operation of on-load switch.

Finally describe from Fig. 4 open position to Fig. 3 closing position each mechanism action process: the actuating unit of operating mechanism 2 Work, drives actuator to drive the output toggle arm on output shaft to turn clockwise, and output toggle arm promotes the pull bar 133 of body 1 To left shown in figure move, conduction loop bar 131 along with pull bar 133 to left shown in figure move, and promote piston plate 52 and First the spout of conduction arc extinguishing assembly 55 simultaneously moving contact radome 54 on the left of left movement, piston plate 52 contacts static contact screen Cover cover 44, form the radome closed；Moving contact radome 54 continues to press on tactile static contact radome 44 and is moved to the left, moving contact Assembly 55 moves closer to inlet wire conductor 42 until completely grafting, close to and grafting during the electric arc that produces is completely isolated is closing Radome in；The internal moving contact core of moving contact component 55, static contact end are provided with the conductive material of high melting point, grafting process Middle internal moving contact core, stationary contact head height melting point position contact at first, are resistant to the high temperature that electric arc produces；The body of air cavity I during combined floodgate Long-pending meeting be compressed, and the internal reversely ejection of the spout of a part of driven contact shield cover 54 of gas, moving contact component 55 carries out arc extinguishing, A part sprays from the passage of the piston plate 52 outside spout, the beneficially extinguishing of electric arc；The internal arcing fault of on-load switch Time high pressure gas physical ability explosion pressure release passage 45 thin-walled after go out, it is to avoid hurt operator or destroy other parts, closing a floodgate The back-moving spring of operating mechanism 2 energy storage simultaneously in journey；Direct acting type three-stations load switch the most of the present utility model is in Fig. 3 institute The closing position shown, inlet wire pole 4,6 electrically conductings of outlet pole；Electrically disconnection it is between outlet pole 6 and earthing bar 14 State, will not occur maloperation.

Claims (10)

1. a direct acting type three-stations load switch, it is characterised in that: described direct acting type three-stations load switch includes body (1), operating mechanism (2), mounting bracket (3), body (1), operating mechanism (2) are fixedly mounted in mounting bracket (3)；Body (1) shell is tubular construction, and rear and front end is closed by inlet wire pole (4), capping (7) respectively, internal by piston plate (52), guiding Seat (161), outlet pole (6) are divided into tetra-air cavitys of I, II, III, IV, the passage that piston plate (52) is through before and after having, Air cavity I, II interconnect；Inlet wire pole (4) is provided with static contact, and piston plate (52) is provided with moving contact component (55), outlet Pole (6) is provided with conductive seat (61) and Interposer contact, capping (7) is provided with grounding contact (73)；Moving contact component (55) Rear side is installed with insulated tension pole (13), and insulated tension pole (13) sequentially passes through guide holder (161), the centre of outlet pole (6) Contact, capping (7) grounding contact after be connected with operating mechanism, and can be driven axially translated by operating mechanism；Described directly Ejector half three-stations load switch has three operating positions, closing position, open position and earthing position, when closing position, Moving contact component (55) turns on the direct grafting of static contact, and moving contact component (55), conductive seat (61) pass through insulated tension pole (13) Conduction loop bar (131) conducting of leading portion, grounding contact (73), conductive seat (61) disconnect；When open position, moving contact component (55), static contact disconnect, grounding contact (73), conductive seat (61) also disconnect；When earthing position, static contact, moving contact component (55) disconnect, turned on by conduction loop bar (131) between moving contact component (55), grounding contact (73).

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described shell is metal material, By the first paragraph shell of fixing inlet wire pole (4), second segment shell, the 3rd section of shell of fixing outlet pole (6) and capping (7) Composition, each section is composed of a fixed connection by ring flange and can be grounded the cylindrical outer casing of function.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described inlet wire pole (4) includes Inlet wire cable cone (41), inlet wire conductor (42), static contact radome (44), pressure release passage (45), inlet wire conductor (42) is through epoxy Resin-cast is connecing first paragraph enclosure, and the epoxy resin after moulding by casting is inlet wire cable cone (41)；Inlet wire conductor (42) being that the conductor material with right-angle structure is made, horizontal position end is equipped with static contact and static contact radome (44), quiet Contact shield cover (44) can horizontally slip vertically, and static contact radome (44) is internal is additionally provided with back-moving spring；Inlet wire pole Arranging pressure release passage (45) on post (4), pressure release passage (45) has the wall of thinner thickness.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described moving contact component (55) is pacified Being loaded on piston plate (52) centre, moving contact component (55) is internal and rear end is respectively provided with the most through passage；Piston plate (52) being provided with the guide ring of loop configuration between periphery and outer casing inner wall, left side is provided with moving contact radome (54) cover and is loaded on Moving contact component (55) is outside, and contact shield cover (54) is provided with spout.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described guide holder (161) center Being provided with catch jacket (164), catch jacket (164) rear inside has restriction protrusion, and conductive seat (61) leading portion outer surface has limit Position groove, in catch jacket (164) inner side limiting-position projection can snap in conductive seat (61) outer surface stopper slot, restricted guidance seat moves；Claw Being provided with guideway (163) in set (164), guideway (163) rear end has the claw of tapered slope and catch jacket rear end Inner surface coordinates, and guideway (163) tapered slope can strut the claw of catch jacket rear end so that catch jacket (164) inner side Restriction protrusion can be upwardly away from conductive seat (61) outer surface stopper slot；It is set with between guideway (163) and conduction loop bar (131) Having back-moving spring (165), back-moving spring (165) two ends are limited by step and conductive seat (61) front end of guideway (163) inner side Position；Being additionally provided with cycle spring between catch jacket (164) and guideway (163), cycle spring two ends are by guideway (163) Step in the step of front end outer side and catch jacket is spacing；It is installed with limited block (166), conduction in conduction loop bar (131) Limited block (166) can be driven on loop bar (131) to promote guide holder axially translated, guide holder (161) periphery and outer casing inner wall Between be provided with the guide ring of loop configuration.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described outlet pole (6) includes Have outlet cable bore (62), conductive seat (61), outlet conductor (63), conductive seat (61), outlet conductor (63) by epoxy resin in In 3rd section of shell, moulding by casting is that outlet cable bores (62)；Conductive seat (61) is arranged at the centre of the 3rd section of shell, leads Electricity seat (61) leading portion has sleeve shaped structure and forward extends out outlet cable cone (62)；Guideway (163), catch jacket (164) overlap It is loaded on the sleeve shaped structure of conductive seat (61) leading portion.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described capping (7) centre Grounding contact (73) is installed, there is inside grounding contact passage, passage back-end closure；Capping (7) outside is additionally provided with Outlet connects enclosed valve (15), earthing bar (14) respectively.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described insulated tension pole (13) back segment Being provided with pull bar (133), pull bar (133) is connected with operating mechanism and can be driven by operating mechanism axially translated, insulated tension pole (13) being additionally provided with watchband-shaped contactor (135), watchband-shaped contactor (135) is installed in conduction loop bar (131) and conductive seat (61) leading portion Between sleeve shaped structure；Conduction loop bar (131), insulated tension pole (132), pull bar (133) have hollow structure, and hollow structure is mutual Connection forms air vent channel, and air vent channel front end connects with moving contact component (55) passage, air vent channel back-end closure；Conduction Loop bar (131), insulated tension pole (132), pull bar (133) also have pore, pore I, II, III, IV tetra-internal with body (1) Air cavity communicates.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: the internal I of described body (1), II, Being filled with insulating gas in tetra-air cavitys of III, IV, insulating gas is one of sulfur hexafluoride, drying nitrogen；By absolutely between air cavity Edge pull bar (13), conduction loop bar (131) above air vent channel and piston plate (52), moving contact component (55), grounding contact Passage form the air cavity that is interconnected, piston plate (52), guide holder (161) are put down under insulated tension pole (13) drives vertically Shifting can change I, II, III air cavity volume size.

Direct acting type three-stations load switch the most according to claim 1, it is characterised in that: described mounting bracket (3) bag Include installing plate (31), girder (32), axle bed (33), fixed plate (34), installing plate (31), girder (32), axle bed (33), fixing Plate (34) connection fastened to each other.