CN203367118U - Three-position isolation grounding switch - Google Patents
Three-position isolation grounding switch Download PDFInfo
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- CN203367118U CN203367118U CN 201320335784 CN201320335784U CN203367118U CN 203367118 U CN203367118 U CN 203367118U CN 201320335784 CN201320335784 CN 201320335784 CN 201320335784 U CN201320335784 U CN 201320335784U CN 203367118 U CN203367118 U CN 203367118U
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- ratchet
- hollow shaft
- pole
- isolation
- torsion spring
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Abstract
Provided is a three-position isolation grounding switch which solves problems that an existing three-position isolation grounding switch has no visual fracture or capacity of closing short circuit current, and is not tight in sealing. The three-position isolation grounding switch comprises a pole pillar and an operating mechanism. Technical points of the three-position isolation grounding switch are that the pole pillar and the operating mechanism both adopt a miniature modularization structure. The all-insulation modularization pole pillar adopts an insulating shell made of epoxy resin so that an observation window divided by a visual isolation knife is set. Connecting flanges of the upper wire outlet end and the lower wire outlet end of the pole pillar are identical in structure. A rotating shaft of the operating mechanism adopts a hollow shaft with an internally arranged straight plate torsion spring. An operating shaft of the mechanism body drives a protrusion wheel to rotate so that separation and reunion of a ratchet pawl and a ratchet wheel are driven, energy storage and energy releasing of the straight plate torsion spring are completed and thus separation and reunion isolation and ground connection are realized. The three-position isolation grounding switch is compact in structure, reasonable in design, high in insulating strength after components are miniature modularized, great in interchangeability, convenient to install and debug onsite, high in rapid separation and rapid reunion fracture speed, visible in isolation fracture and safe and reliable to use so that the service life is prolonged.
Description
Technical field
The utility model relates to a kind of unit for solid-state insulated switchgear, a kind of 12～24Kv that is suitable for particularly, and the small modular solid insulation of using in 50Hz three-phase alternating current electrical network has three station isolation grounding switchs of visual fracture.Mainly be suitable for the solid insulation ring main unit solid assembled unit of composition module.
Background technology
At present, in the solid insulation loop-network switch cabinet in urban architecture, market, public utilities, airport, railway, traffic, coal, chemical industry, iron and steel, industrial and mining enterprises and the three-phase alternating current electrical networks such as power transmission and transformation station and power plant, generally all adopt the insulated switch unit.It can be divided into solid insulation isolating switch unit, air insulated isolation switch unit and vacuum switch unit etc. by dielectric.Air insulated, earthed switch and the isolation ground connection three-station of existing solid insulation cabinet are in operation, and still have certain hidden danger.Its sealing switch cover, or open wide, or being bad sealing, the even short circuit accident once its insulating surface, by pollutions such as foreign matter and moisture, will leak electricity, jeopardize security of operation; It does not possess the ability that closes earth short circuit current yet.
In middle pressure field, the trend that volume is little, that electrical property is high Vacuum Relay Technique expands to isolation and ground connection fracture is very obvious, the single fracture isolation of some employings, some employing isolation ground connection three-stations, what also have is researching and developing integrated arc extinguishing, isolation and ground connection three function vacuum interrupters.But, aspect the vacuum insulation fracture, owing to significantly not breaking through on principle and structure, the security reliability of isolation exists hidden danger; Although the gas leakage probability of modern vacuum switch tube very low (have report be ten thousand/several), gas leakage certainly exists, and the user can't be sure of the insulating reliability of vacuum insulation fracture (being particularly the single vacuum isolation fracture in loop); The vacuum insulation fracture does not possess creepage protection function, can not think that it has to meet isolating switch function standard code, truly.According to pertinent literature report, aspect isolation fracture, that existing main product still adopts is traditional, air-insulated isolation, earthed switch and isolation ground connection three-station.As " a kind of sealing full-vacuum switching device " that publication No. is CN102360986A, it adopts vacuum interrupter chamber as isolation ground connection galvanic circle.The shortcoming of this device is without visual fracture, and current domestic vacuum on-line monitoring technique also do not pass a test, once vacuum interrupter chamber gas leakage will jeopardize operating personnel's life.As " solid isolated vacuum ring main unit " that publication No. is the CN102664363A record, the structure of employing is that standard electric cable end, standard silicone rubbers dry type bus are arranged on the vacuum switch unit in cabinet by screw; Standard electric cable end, standard silicone rubbers dry type bus are arranged on respectively on the cable plug and bus plug of pole.Three station vacuum arc extinguish chambers that adopt, himself have combined floodgate, separating brake isolation, ground connection totally three service positions, simplified the structure of switch; Because all electrified bodies are all poured into a mould or are arranged in epoxy resin, can not be subject to the impact of external environment condition on the electric property of ring main unit, reduced equipment maintenance, extended useful life.But, owing to adopting vacuum interrupter to do isolating switch, its fracture is invisible, once mechanical breakdown or vacuum interrupter gas leakage occur, will jeopardizes personal safety, and not meet standard-required.Its vacuum interrupter horizontal positioned, the porcelain shell is subject to Lateral Force, easily break, and operation insulator fairlead frictional resistance is large.The circuit breaker inlet wire exists blow-by or poorly sealed problem.As notification number be CN202230967U " indoor high-voltage vacuum circuit breaker, isolation and earthed switch combined electrical apparatus ", disclosed complex structure, in practical operation, center is difficult to control, and isolating switch is simple air insulation, there is no solid insulation, do not possess the rapid closing function, do not there is the ability that closes short circuit current.
The utility model content
The purpose of this utility model is to provide a kind of three station isolation grounding switchs with visual fracture, existing three station isolation grounding switchs have been solved without visual fracture, without closing the short circuit current ability, without sealing or the problem such as poorly sealed, its compact conformation, reasonable in design, parts are easily realized small modular, save material, dielectric strength is high, interchangeability is good, is convenient to on-the-spot installation, debugging, completes deciliter isolation ground connection fracture speed high, there is the making capability that divides soon soon close, isolation fracture is visible, safe and reliable, increases the service life.
The technical scheme that the utility model adopts is: these three station isolation grounding switchs with visual fracture comprise operating mechanism and pole, its technical essential is: described pole and operating mechanism all adopt the small modular structure, all insulation modularization pole comprises the insulation crust that adopts epoxy resin to make, be encapsulated in quiet cutter installing hole, hollow shaft connecting lever, hollow shaft support, connecting plate, knife rest, isolation knife, tool rest, watch chain fingertip Connection Block, grounding base in the casing insulation cavity, the sealing gasket of can and rear shrouding; Pole arranges the observation window of visual isolation knife disjunction, and the connecting flange structure of the upper and lower leading-out terminal of pole is identical; The small modular operating mechanism comprises rotating shaft and mechanism body on installing rack and assembling installing rack for pole, rotating shaft is hollow shaft, the hollow shaft inner chamber has straight plate torsion spring, one end of hollow shaft and straight plate torsion spring is assembled on same axle sleeve, the other end of hollow shaft is fixedly connected with the coaxial ratchet of mechanism body, and the other end of straight plate torsion spring is fixedly connected with the camshaft of mechanism body; The axle center of cam and the axle center of ratchet are on same axis, and the operating axis drive cam shaft of mechanism body is rotated, and the boss of cam periphery backs down ratchet, and release energy driving pawl and hollow shaft of straight plate torsion spring rotates, until ratchet is withstood and stops operating by next ratchet.
The insulation crust outer surface metal spraying of described pole belongs to enamelled coating or semi-conductive layer, and direct ground connection.
Described mechanism body comprises the clamping plate type framework, is assembled in the ratchet in framework, with the ratchet that the ratchet periphery is meshed, cam, and the operating axis that drive cam shaft is rotated.
Advantage and the good effect that the utlity model has are: because the utility model adopts pole and the operating mechanism of whole small modular structure, so its compact conformation is reasonable in design, and the insulation crust that pole adopts epoxy resin to make, dielectric strength is high; The observation window of visual isolation knife disjunction is set at the sidewall of pole, and fracture is visible, safe and reliable; The upper and lower leading-out terminal of pole arranges the adpting flange that structure is identical, and the stronger adpting flange of this general interchangeability, be conducive to adopt silicone rubber seal, carries out the bolt connection, easily realizes hermetically sealed connection; Above-mentioned all insulation modularization pole can be according to actual needs, with the output static contact seat end flanges of vacuum circuit breaker polar shell, be connected, the kinds of schemes combination in any, the upper isolated form assembled unit of circuit breaker under isolating switch on composition, or composition is gone up the lower isolated form assembled unit of isolating switch under circuit breaker, modularization is installed, and has reduced installation difficulty, is convenient to on-the-spot installation, debugging.The rotating shaft of small modular operating mechanism is the hollow shaft that inner chamber is provided with straight plate torsion spring, and hollow axle end is fixedly connected with coaxial ratchet, and straight plate torsion spring end is fixedly connected with camshaft, and same straight plate torsion spring of actuating saved material, and one multiplex; By the rotation of operating axis driving cam, drive the clutch of ratchet and ratchet, realize energy storage, the release of straight plate torsion spring, complete deciliter isolation ground connection fracture speed high, there is the making capability that divides soon soon close, meet standard-required.The mechanism body parts Standardization degree of operating mechanism is high, can batch machining, therefore be conducive to small modular production.In addition, the pole shell also can spray conduction enamelled coating or semi-conductive layer, and reliable ground, tangible, can not produce injury to human body.
In sum, the utility model can be realized small modular veritably, hermetically sealed all insulation has three station isolation grounding switchs of visual fracture, safe and reliable, existing three station isolation grounding switchs have been solved without visual fracture, without closing the short circuit current ability, without sealing or poorly sealed problem.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is pole in Fig. 1 cutaway view along the A-A line;
Fig. 3 is the end view of Fig. 1;
Fig. 4 is operating mechanism in Fig. 3 cutaway view along the B-B line;
Fig. 5 is the cutaway view of Fig. 4 along the C-C line;
Fig. 6 is a kind of perspective view of the mechanism body in Fig. 1.
Sequence number explanation in figure: 1 pole, 2 operating mechanisms, 3 shells, 4 isolation knife, 5 quiet cutter installing holes, 6 sealing gaskets, 7 rear shroudings, 8 knife rests, 9 win in succession, 10 hollow shaft connecting levers, 11 hollow shaft supports, 12 tool rests, 13 watch chain fingertip Connection Blocks, 14 grounding bases, 15 observation windows, 16 installing racks, 17 bearing pedestals, 18 hollow shafts, 19 straight plate torsion springs, 20 axle sleeves, 21 frameworks, 22 operating axis, 23 cams, 24 ratchets, 25 supports, 26 separating brake ratchets, 27 splice grafting ground ratchets, 28 minutes ground connection ratchets, 29 combined floodgate ratchets, 30 springs.
Embodiment
Describe concrete structure of the present utility model and the course of work in detail according to Fig. 1～6.These three station isolation grounding switchs with visual fracture comprise pole 1 and operating mechanism 2.Wherein pole 1 and operating mechanism 2 all adopt the small modular structure.All insulation modularization pole 1 comprises the insulation crust 3 that adopts epoxy resin to make, be encapsulated in the quiet cutter installing hole 5 of upper leading-out terminal, hollow shaft connecting lever 10, hollow shaft support 11, connecting plate 9, knife rest 8, isolation knife 4, tool rest 12, lower wire end watch chain fingertip Connection Block 13, grounding base 14 in shell 3 insulation cavitys, the parts such as the sealing gasket 6 of can 3 and rear shrouding 7.Pole isolation knife 4 can adopt the manufacture of chromium-copper material, makes it have the ability that closes short circuit current.Pole shell 3 insulation inside cavity can be air or filling with inert gas, nitrogen gas insulating.On the sidewall of shell 3, setting can be observed the observation window 15 of visual isolation knife 4 disjunctions of internal insulation cutter 4 fracture site of living in, makes isolation fracture be easy to observe; Because utilizing sealing gasket 6 and rear shrouding 7, shell 3 forms airtight insulation cavity, therefore can realize the insulation cavity of pole 1 and extraneous isolation fully; Can also belong to enamelled coating or semi-conductive layer at the outer surface metal spraying of pole shell 3, so not only tangible, and can not produce injury to human body; And can utilize the direct ground connection of grounding base 14, further to improve the security reliability of isolation.Upper leading-out terminal at the quiet cutter installing hole 5 of pole arranges respectively with the lower wire end of watch chain fingertip Connection Block 13 adpting flange that structure is identical, in order to be connected with the output static contact seat end flanges of vacuum circuit breaker polar, form according to actual needs the upper isolated form assembled unit of circuit breaker under upper isolating switch, or form the lower isolated form assembled unit of isolating switch under upper circuit breaker.
The course of work of this three station isolation grounding switch is as follows:
The hollow shaft connecting lever 10 of operating mechanism 2 poles 1 rotates, and hollow shaft connecting lever 10 drives by the 9 hinged knife rests 8 of winning in succession and promotes isolation knife 4 around tool rest 12 rotations, and the quiet cutter that makes isolation knife 4 and top be arranged on 5 li of quiet cutter installing holes separates, and realization separates with electrified body.Continue operation operating mechanism 2, isolation knife 4 and grounding base 14 are connected, realize reliable ground.The maintenance works such as carrying out maintenance that now can be safe.The operating state of isolation knife 4 fracture site of living in, close, isolation, ground connection can observe by observation window 15.Can realize respectively resetting of ratchet 26～29 by spring 30.
During separating brake, use the counterclockwise actuating operating axis 22 of operating grip, operating axis 22 driving cams 23 and straight plate torsion spring 19 rotate, because an end of straight plate torsion spring 19 and hollow shaft 18 is fixed on axle sleeve 20, the other end of hollow shaft 18 and ratchet 24 are fixing, the stop of separating brake ratchet 26, can not rotate ratchet 24 and hollow shaft 18, so straight plate torsion spring 19 is by energy storage.When cam 23 backs down separating brake ratchet 26, ratchet 24 loses stop, the energy that spring stores is released, the energy of abrupt release promotes ratchet 24, hollow shaft 18 and hollow shaft connecting lever 10 and rotates, hollow shaft connecting lever 10 drives by the 9 hinged knife rests 8 of winning in succession and promotes isolation knife 4 around tool rest 12 rotations, the quiet cutter that makes isolation knife 4 and top be arranged on 5 li of quiet cutter installing holes separates, and with electrified body, separates, and realizes quick acting switching-off.When splice grafting ground ratchet 27 withstands ratchet 24, hollow shaft 18 stops operating.Now realize isolated operation.
During splice grafting ground, use the counterclockwise actuating operating axis 22 of operating grip, operating axis 22 driving cams 23 and straight plate torsion spring 19 rotate, and due to the stop of splice grafting ground ratchet 27, ratchet 24 and hollow shaft 18 can not be rotated, so straight plate torsion spring 19 is by energy storage.When cam 23 backs down splice grafting ground ratchet 27, ratchet 24 loses stop, the energy that spring stores is released, the energy of abrupt release promotes ratchet 24 and hollow shaft 18, hollow shaft connecting lever 10 are rotated further, hollow shaft connecting lever 10 drives by the 9 hinged knife rests 8 of winning in succession and promotes isolation knife 4 around tool rest 12 rotations, and isolation knife 4 and grounding base 14 are connected.When combined floodgate ratchet 29 withstands ratchet 24, hollow shaft 18 and hollow shaft connecting lever 10 stop operating.Now be grounded operation.
During minute ground connection, use the clockwise actuating operating axis 22 of operating grip, operating axis 22 driving cams 23 and straight plate torsion spring 19 rotate, and due to the stop of combined floodgate ratchet 29, ratchet 24 and hollow shaft 18 can not be rotated, so straight plate torsion spring 19 is by energy storage.When cam 23 backs down combined floodgate ratchet 29, ratchet 24 loses stop, and the energy that spring stores is released, and the energy of abrupt release promotes ratchet 24 and hollow shaft 18 rotates.When a minute ground connection ratchet 28 withstands ratchet 24, hollow shaft 18 stops operating.Realize minute ground connection operation fast.
During combined floodgate, use the clockwise actuating operating axis 22 of operating grip, operating axis 22 driving cams 23 and straight plate torsion spring 19 rotate, and the stop due to minute ground connection ratchet 28, can not rotate ratchet 24 and hollow shaft 18, so straight plate torsion spring 19 is by energy storage.When cam 23 backs down minute ground connection ratchet 28, ratchet 24 loses stop, and the energy that spring stores is released, and the energy of abrupt release promotes ratchet 24 and hollow shaft 18 rotates.When separating brake ratchet 26 withstands ratchet 24, hollow shaft 18 and hollow shaft connecting lever 10 stop operating.Realize the rapid closing operation.
Claims (3)
1. a station isolation grounding switch, comprise operating mechanism and pole, it is characterized in that: described pole and operating mechanism all adopt the small modular structure, all insulation modularization pole comprises the insulation crust that adopts epoxy resin to make, be encapsulated in quiet cutter installing hole, hollow shaft connecting lever, hollow shaft support, connecting plate, knife rest, isolation knife, tool rest, watch chain fingertip Connection Block, grounding base in the casing insulation cavity, the sealing gasket of can and rear shrouding; Pole arranges the observation window of visual isolation knife disjunction, and the connecting flange structure of the upper and lower leading-out terminal of pole is identical; The small modular operating mechanism comprises rotating shaft and mechanism body on installing rack and assembling installing rack for pole, rotating shaft is hollow shaft, the hollow shaft inner chamber has straight plate torsion spring, one end of hollow shaft and straight plate torsion spring is assembled on same axle sleeve, the other end of hollow shaft is fixedly connected with the coaxial ratchet of mechanism body, and the other end of straight plate torsion spring is fixedly connected with the camshaft of mechanism body; The axle center of cam and the axle center of ratchet are on same axis, and the operating axis drive cam shaft of mechanism body is rotated, and the boss of cam periphery backs down ratchet, and release energy driving pawl and hollow shaft of straight plate torsion spring rotates, until ratchet is withstood and stops operating by next ratchet.
2. three station isolation grounding switchs according to claim 1, it is characterized in that: the insulation crust outer surface metal spraying of described pole belongs to enamelled coating or semi-conductive layer, and direct ground connection.
3. three station isolation grounding switchs according to claim 1, it is characterized in that: described mechanism body comprises the clamping plate type framework, is assembled in the ratchet in framework, with the ratchet that the ratchet periphery is meshed, cam, the operating axis that drive cam shaft is rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320335784 CN203367118U (en) | 2013-06-13 | 2013-06-13 | Three-position isolation grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320335784 CN203367118U (en) | 2013-06-13 | 2013-06-13 | Three-position isolation grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203367118U true CN203367118U (en) | 2013-12-25 |
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ID=49814843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320335784 Expired - Fee Related CN203367118U (en) | 2013-06-13 | 2013-06-13 | Three-position isolation grounding switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN203367118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325606A (en) * | 2013-06-13 | 2013-09-25 | 沈阳春兴成套电器制造有限公司 | Three-position isolation earthing switch |
| RU2716131C1 (en) * | 2019-03-15 | 2020-03-06 | Общество с ограниченной ответственностью Научно-производственное объединение "Электрощит" | Transfer device assembly of movable contacts of electrical devices |
-
2013
- 2013-06-13 CN CN 201320335784 patent/CN203367118U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325606A (en) * | 2013-06-13 | 2013-09-25 | 沈阳春兴成套电器制造有限公司 | Three-position isolation earthing switch |
| RU2716131C1 (en) * | 2019-03-15 | 2020-03-06 | Общество с ограниченной ответственностью Научно-производственное объединение "Электрощит" | Transfer device assembly of movable contacts of electrical devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |