CN118380279B - Anti-icing scissor type isolating switch - Google Patents
Anti-icing scissor type isolating switch Download PDFInfo
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- CN118380279B CN118380279B CN202410819408.5A CN202410819408A CN118380279B CN 118380279 B CN118380279 B CN 118380279B CN 202410819408 A CN202410819408 A CN 202410819408A CN 118380279 B CN118380279 B CN 118380279B
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- icing
- contact
- bearing seat
- pin shaft
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- 230000009471 action Effects 0.000 claims abstract description 32
- 230000003068 static effect Effects 0.000 claims abstract description 28
- 230000002265 prevention Effects 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 238000009434 installation Methods 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention relates to an anti-icing scissor type isolating switch, which comprises a moving contact and a fixed contact which are matched with each other, wherein the moving contact is positioned below the fixed contact and is respectively arranged on a pair of conducting arms which are connected in a scissor type, and the two conducting arms are driven by an operating mechanism to swing and drive the moving contact to be close to or far from the fixed contact; the first ice-coating prevention unit is arranged at the static contact and comprises an ice-coating prevention cover positioned above the static contact; the second anti-icing unit arranged at the moving contact comprises anti-icing cover plates arranged at the end parts of the conductive arms, and the two anti-icing cover plates perform opening or closing actions along with the action of the conductive arms, so that the moving contact is protected or the moving contact is released. According to the anti-icing scissor type isolating switch, the first anti-icing unit and the second anti-icing unit are matched to realize anti-icing treatment on the fixed contact and the moving contact, so that the fixed contact and the moving contact can be well protected.
Description
Technical Field
The invention relates to an isolating switch, in particular to an anti-icing scissor type isolating switch.
Background
The scissor type isolating switch is an outdoor high-voltage alternating current isolating switch, the fixed contact is a copper pipe, the moving contact is a copper plate or a copper section bar, and the switching-on moving contact and the switching-off moving contact are in line contact.
At present, the outdoor high-voltage scissor type isolating switch breaks ice mainly by the clamping force of the equipment closing body, and by the manual deicing mode, the ice is time-consuming and labor-consuming, and in addition, due to the consideration of safety, the bus is required to be powered off. The anti-icing device of the scissor type isolating switch is characterized in that a guide rail is added on a movable contact of equipment, a protective cover is arranged on the guide rail and is connected with a lower conducting tube of the equipment through a connecting rod, and the connecting rod pushes the protective cover upwards to cover the movable contact clamp for clamping during opening; when the switch is closed, the connecting rod pull-down protective cover is separated from the moving contact clamp to ensure good switching-on contact of the moving contact after the switch is in place. The device has a complex structure, the transmission is exposed, and the transmission is easy to be blocked and invalid by ice coating.
For example, in patent CN108604511B, a disconnecting switch with an anti-icing device is proposed, which includes a main blade power contact, a main blade arm, a main blade stationary contact, a main blade transmission device, and a main blade anti-icing device. The main cutter transmission device is used for driving the main cutter arm to move far. The main knife anti-icing device comprises a main knife anti-icing cover and a main knife anti-icing cover driving device, wherein the main knife anti-icing cover driving device is used for driving the main knife anti-icing cover, so that the main knife anti-icing cover shields the main knife power contact in a switching-off state, ice and snow are prevented from being covered on the surface of the main knife power contact, and the main knife anti-icing cover is moved away from the main knife power contact in a switching-on state, so that the main knife power contact can be contacted with the main knife static contact.
The isolating switch in the patent plays a role in preventing ice coating on the main knife moving contact by adopting the action of the main knife anti-icing cover, and the action of the main knife anti-icing cover is realized by adopting a mode of additionally arranging a guide rail on the moving contact.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-icing scissor type isolating switch with good anti-icing effect.
In order to solve the technical problems, the technical scheme of the invention is as follows: an anti-icing scissor type isolating switch is characterized in that: comprising
The movable contact and the fixed contact are matched with each other, the fixed contact is arranged below a wiring board, two sides of the wiring board are fixed with the fixed contact through the matching of an upper conductive clamp and an aluminum strand, the movable contact is arranged below the fixed contact and is respectively arranged on a pair of conductive arms which are connected in a scissor type, and the two conductive arms are driven by an operating mechanism to swing and drive the movable contact to approach or be far away from the fixed contact;
The first anti-icing unit is arranged at the static contact and comprises an anti-icing cover arranged on the upper conductive clamp, and the anti-icing cover is positioned above the static contact and covers the whole static contact;
The second anti-icing unit is arranged at the moving contact and comprises anti-icing cover plates which are arranged at the end parts of the conductive arms and cover the whole moving contact, and the two anti-icing cover plates are opened or closed along with the action of the conductive arms, so that the moving contact is protected or the moving contact is released.
Further, the connection between the ice-coating preventing cover and the upper conductive clamp is as follows: the two sides of the anti-icing cover are respectively fixed with the upper conductive clamps through a pair of hanging steel wire ropes, the two hanging steel wire ropes positioned on the same side of the anti-icing cover are distributed in a splayed shape, the top ends of the hanging steel wire ropes are fixed with the upper conductive clamps through first steel wire rope locks, the bottom ends of the hanging steel wire ropes penetrate through the anti-icing cover and then are fixed through second steel wire rope locks, and through holes for allowing the hanging steel wire ropes to penetrate are formed in the anti-icing cover.
Further, the ice-covering-preventing cover is provided with two through holes through which the same hanging steel wire rope passes, the two through holes are sequentially defined as a first through hole and a second through hole, the first through hole is located on the outer side, the second through hole is located on the inner side, and the hanging steel wire rope passes through the first through hole from top to bottom and then passes through the second through hole from bottom to top, and the fixing is realized through the cooperation of the second steel wire rope lock catch.
Further, the anti-icing cover is of an inverted U-shaped structure formed by jointly connecting a horizontal plate positioned above the static contact and inclined plates connected to two sides of the horizontal plate, the horizontal plate extends along the long axis of the static contact in a square shape, and the inclined direction of the inclined plate is gradually inclined downwards from the joint of the inclined plate and the horizontal plate.
Further, the anti-icing cover plate is formed by connecting a middle plate positioned in the middle position and inclined side plates vertically connected to two sides of the middle plate, and the inclined direction of the inclined side plates is gradually inclined to the direction close to the moving contact from the connecting side of the inclined side plates and the middle plate.
Further, the action fit between the anti-icing cover plate and the conductive arm is as follows: the anti-icing cover plate is fixed on a follow-up cover, and the follow-up cover is sleeved at the end part of one side of the conductive arm, on which the movable contact is arranged, and is movably connected with the conductive arm;
The follow-up cover comprises a cover main body, a bearing seat, a rotating cam, a connecting pin shaft and a reset torsion spring, wherein the cover main body is fixedly connected with the upper side of the anti-icing cover plate, and the rotating cam, the cover main body and the bearing seat are sequentially distributed at the end part of the conductive arm and are connected through the connecting pin shaft;
the rotary cams are provided with action sections which extend outwards from the cover body, the action sections are arc-shaped, the action sections of the rotary cams on the two follow-up cover covers are distributed relatively, and after the conducting arm is switched on, the action sections of the two rotary cams are contacted with each other and drive the cover body to rotate, so that the opening action of the two anti-icing cover plates is realized;
The cover body is of a hollow disc structure with an opening at the lower end, a cavity for accommodating the bearing seat to extend into is formed in the bottom of the cover body, and a gap is reserved between the outer wall of the bearing seat and the inner wall of the cover body;
the bearing seat is of a hollow cylindrical structure with an opening at the lower end, a cavity for accommodating the insertion and installation of the end part of the conductive arm is arranged at the bottom of the bearing seat, and the conductive arm is fixed through a pair of fixing screws after being inserted into the cavity of the bearing seat;
The connecting pin shaft and the cover cap main body are integrally formed, one side of the connecting pin shaft penetrates through the rotating cam and then is fixed through the cap nut, the other side of the connecting pin shaft penetrates through the bearing seat and then extends into the conductive arm, and a cavity for accommodating the connecting pin shaft to extend into and move is formed at the end part of the conductive arm;
the reset torsion spring is positioned in the cavity of the bearing seat and sleeved on the outer wall of the connecting pin shaft, one side of the reset torsion spring is fixed on the connecting pin shaft, the other side of the reset torsion spring is fixed on the bearing seat, and the two ice-covering-preventing cover plates are closed through the cooperation of the reset torsion spring.
Further, the inner wall of the bearing seat is provided with a plurality of fixing columns used for fixing the reset torsion springs, each fixing column is distributed on the outer side of the circumference of the connecting pin shaft, the centers of the fixing columns are on the same circle, and the circle center of the circle is on the axis of the connecting pin shaft.
Furthermore, a ring-shaped bearing sleeve is arranged between the bearing seat and the connecting pin shaft, an annular groove for embedding the bearing sleeve is formed in the circumferential outer wall of the connecting pin shaft, and an annular groove for embedding the bearing seat is formed in the circumferential outer wall of the bearing sleeve.
The invention has the advantages that: according to the anti-icing scissor type isolating switch, the first anti-icing unit and the second anti-icing unit are matched to realize anti-icing treatment on the fixed contact and the moving contact, so that the fixed contact and the moving contact can be well protected.
The second anti-icing unit is designed to act through the anti-icing cover plate following the action of the conductive arm, and an additional active driving mechanism is not needed to drive the anti-icing cover plate to act, so that the problem that effective anti-icing protection cannot be carried out on the moving contact due to the active driving mechanism is avoided; to the follow-up action of preventing icing apron, adopt shroud main part, the bearing frame, rotate the cooperation between cam, connecting pin axle and the reset torsion spring to realize, realize preventing opening of icing apron through the mutual contact of the action section that extends on two rotation cams, realize two closures of preventing icing apron by the reset torsion spring again, whole structure need not to use initiative driving piece, through the design of parts such as the shroud main part that the inner cover was established moreover, the bearing frame, form fine protection to rotation department, avoid external ice and snow to cause the interference to rotation department and appear blocking phenomenon such as dead, ensured preventing smooth opening or closure of icing apron.
The anti-icing cover plate adopts a middle plate in the middle and oblique side plates on two sides to form a mode, so that the moving contact can be better shielded and protected, and the anti-icing of the moving contact is better realized.
The design of the first anti-icing unit adopts an anti-icing cover with an inverted U-shaped structure, wherein the anti-icing cover is formed by jointly connecting a horizontal plate positioned above the static contact and inclined plates connected to two sides of the horizontal plate, and rain and snow inclined by more than 45 degrees can be isolated by utilizing the anti-icing cover with the shape, so that the static contact is well protected.
The connection between the anti-icing cover and the upper conductive clamp is realized by adopting splayed suspension steel wire ropes, so that the anti-icing cover can be stably suspended above the fixed contact, and a good foundation is provided for the purpose of subsequently preventing wind, snow and icing on the fixed contact; and for the cooperation between the anti-icing cover and the suspension wire rope, through the through holes at two different positions formed in the anti-icing cover, and the mode that the suspension wire rope passes through the two through holes is controlled, so that the stability between the single suspension wire rope and the anti-icing cover is improved.
The plurality of fixing columns are arranged on the inner wall of the bearing seat, and the distribution of the fixing columns is controlled, so that the torsion of the reset torsion spring is adjusted to a certain extent by changing the initial position of the reset torsion spring, and stable reset force given to the ice-covering-preventing cover plate is ensured.
The bearing housing arranged between the bearing housing and the connecting pin shaft has the advantages that firstly, the bearing housing and the connecting pin shaft have an interval function, relative abrasion caused by direct contact of the bearing housing and the connecting pin shaft is avoided, and in addition, the bearing housing has a certain limiting function on the relative position between the bearing housing and the connecting pin shaft, and the relative rotation between the bearing housing and the connecting pin shaft is prevented from being influenced due to dislocation of the position between the bearing housing and the connecting pin shaft.
Drawings
Fig. 1 is a schematic diagram of an anti-icing scissor type disconnector according to the invention.
Fig. 2 is a schematic diagram of the installation of the static contact in the present invention.
Fig. 3 is a schematic diagram illustrating the installation of a moving contact in the present invention.
Fig. 4 is an installation front view of the moving contact in the present invention.
FIG. 5 is a schematic diagram showing the cooperation of the ice-covering-preventing cover plate and the follow-up cover cap in the invention.
FIG. 6 is a front view of the ice cover plate and the following cover.
Fig. 7 is a cross-sectional view A-A of fig. 6.
Fig. 8 is a bottom view of the ice-covering prevention cover plate and the follow-up cover in the invention.
FIG. 9 is a top view of the ice cover plate and the following cover.
Fig. 10 is a schematic view of a conductive arm according to the present invention.
Fig. 11 is a schematic diagram of a closing state of the anti-icing scissor type disconnecting switch in the invention.
Fig. 12 is an enlarged schematic view of a portion B of fig. 11.
Fig. 13 is a top view of a closing state of the anti-icing scissor type disconnecting switch according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
The anti-icing scissor-type isolating switch shown in fig. 1-13 comprises a moving contact 1, a fixed contact 2, a wiring board 21, a conductive arm 11, an operating mechanism 12, a first anti-icing unit and a second anti-icing unit which are matched with each other.
The static contact 2 is copper pipe, the static contact 2 is installed in the below of wiring board 21, wiring board 21 is a rectangular plate, still be connected with a link fitting 28 that is used for linking to each other with the generating line on the up end of wiring board 21, still be connected with a conductive clip 22 respectively in the below of the major axis direction both sides of wiring board 21, the static contact 2 is a cylindrical pole, and parallel arrangement between static contact 2 and the wiring board 21, be connected with a lower conductive clip 24 corresponding with last conductive clip 22 respectively in the both sides of the major axis direction of static contact 2, go up conductive clip 22 and be connected through ring-shaped aluminium hank 23 down between the conductive clip 24, realize switching on of circuit.
The first anti-icing unit is installed at the fixed contact 2, and comprises an anti-icing cover installed on the upper conductive clamp 22, wherein the anti-icing cover is located above the fixed contact 2 and covers the whole fixed contact 2.
The anti-icing cover is of an inverted U-shaped structure formed by jointly connecting a horizontal plate 25 positioned above the fixed contact 2 and inclined plates 26 connected to two sides of the horizontal plate 25, the horizontal plate 25 and the inclined plates 26 are rectangular plates, the horizontal plate 25 extends along the long axis square of the fixed contact 2, the inclined direction of the inclined plates 26 is gradually inclined downwards from the connection position of the inclined plates 26 and the horizontal plate 25, and an included angle between the inclined plates 26 and the horizontal plate 25 is 135 degrees. The anti-icing cover with the inverted U-shaped structure, which is formed by jointly connecting a horizontal plate 25 positioned above the fixed contact 2 and inclined plates 26 connected to the two sides of the horizontal plate 25, can isolate rain and snow with the inclination of more than 45 degrees, and realizes good protection of the fixed contact 2.
The connection between the ice-coating prevention cover and the upper conductive clip 22 is: the two sides of the ice-covering prevention cover are respectively fixed with the upper conductive clamps 22 through a pair of hanging steel wire ropes 27, the two hanging steel wire ropes 27 positioned on the same side of the ice-covering prevention cover are distributed in a splayed shape, the whole of the four hanging steel wire ropes 27 is in a trapezoid shape, the top ends of the hanging steel wire ropes 27 are fixed with the upper conductive clamps through first steel wire rope locks, the bottom ends of the hanging steel wire ropes 27 are fixed through second steel wire rope locks 29 after penetrating through horizontal plates 25 of the ice-covering prevention cover, and through holes for allowing the hanging steel wire ropes 27 to penetrate are formed in the ice-covering prevention cover. To preventing to cover and last conductive clamp 22 between be connected, adopt splayed distributed hang wire rope 27 to realize for prevent that cover can stably hang in the top of static contact 2, for the purpose that the follow-up plays the snow ice that prevents to static contact 2 provides good basis, follow-up accessible is adjusted and is hung wire rope 27's suspension height moreover, is applicable to the installation on the bus of different height, simple structure is reliable, installation debugging is convenient, and the cost is lower than similar device.
The horizontal plate 25 of the ice-covering-preventing cover contains two through holes which the same hanging steel wire rope 27 passes through, the two through holes are sequentially defined as a first through hole and a second through hole, the first through hole is positioned on the outer side of the horizontal plate 25, the second through hole is positioned on the inner side of the horizontal plate 25, the hanging steel wire rope 27 passes through the first through hole on the horizontal plate 25 from top to bottom, then passes through the second through hole on the horizontal plate 25 from bottom to top, and the hanging steel wire rope 27 is fixed through the cooperation of the second steel wire rope lock catch 29. To the cooperation between the anti-icing cover and the suspension wire rope 27, through the through holes of two different positions of seting up on the anti-icing cover to control the order, the mode of hanging wire rope 27 and passing two through holes, thereby improve the connection stability between single suspension wire rope 27 and the anti-icing cover, avoid the anti-icing cover to appear rocking phenomenon by a wide margin, and influence the anti-icing protection to static contact 2.
As shown in fig. 3 and 4, the moving contact 1 is a copper plate or a copper section, the moving contact 1 is located below the fixed contact 2 and is respectively mounted on a pair of conducting arms 11 connected in a scissor-type manner, and the two conducting arms 11 are driven by an operating mechanism 12 to swing and drive the moving contact 1 to approach or separate from the fixed contact 2, so that the switching-on and switching-off operation of the moving contact 1 and the fixed contact 2 is realized, and the moving contact 1 and the fixed contact 2 are in line contact during switching-on. The specific structure of the operating mechanism 12 and the action principle of the operating mechanism 12 for driving the conductive arm 11 are common structures and technologies in the prior art, and will not be described in detail in the present invention.
The second anti-icing unit is arranged at the moving contact 1 and comprises an anti-icing cover plate 3 which is arranged at the end part of the conductive arm 11 and covers the whole moving contact 1, and the two anti-icing cover plates 3 are opened or closed along with the action of the conductive arm 11, so that the moving contact 1 is protected or the moving contact 1 is released.
As shown in the schematic diagram of fig. 5, the ice-proof cover plate 3 is formed by connecting a middle plate 31 disposed vertically at a middle position and oblique side plates 32 vertically connected to both sides of the middle plate 31, and the oblique direction of the oblique side plates 32 is gradually inclined from the connection side of the oblique side plates 32 and the middle plate 31 to a direction approaching the moving contact 1. The anti-icing cover plate 3 adopts a middle plate 31 in the middle and oblique side plates 32 on two sides to form a better shielding protection for the moving contact 1, and better anti-icing purpose for the moving contact 1 is achieved.
The action fit between the ice-covering-preventing cover plate 3 and the conductive arm 11 is as follows: the anti-icing cover plate 3 is fixed on a follow-up cover which is sleeved at one side end part of the conductive arm 11 where the moving contact 1 is arranged, and the follow-up cover is movably connected with the conductive arm 11.
As shown in the schematic diagrams of fig. 5-9, the following cover includes a cover body 4, a bearing seat 41, a rotating cam 42, a connecting pin 43 and a reset torsion spring 44, wherein the cover body 4 is fixedly connected to the upper side of the middle plate 31 of the ice-covering-preventing cover plate 3, the rotating cam 42, the cover body 4 and the bearing seat 41 are sequentially distributed at the end of the conductive arm 11, and the rotating cam 42, the cover body 4 and the bearing seat 41 are connected by the cooperation of the connecting pin 43.
The rotating cam 42 has an action section 421 extending outwards beyond the cover body 4, the action section 421 is arc-shaped, the action sections 421 of the rotating cams 42 on the two follow-up covers are distributed relatively, after the conducting arm 11 is switched on, the action sections 421 of the two rotating cams 42 contact each other and drive the cover body 4 to rotate, and then the opening action of the two anti-icing cover plates 3 is realized, as shown in fig. 12.
The cover body 4 is of a hollow disc structure with an opening at the lower end, a cavity for accommodating the bearing seat 41 is formed in the bottom of the cover body 4, and after the upper end of the bearing seat 41 stretches into the cavity of the cover body 4, a gap is reserved between the outer wall of the bearing seat 41 and the inner wall of the cover body 4, so that the cover body 4 can freely rotate relative to the bearing seat 41 conveniently, and interference between the bearing seat 41 and the cover body is avoided.
The bearing seat 41 is a hollow cylindrical structure with an opening at the lower end, a cavity for inserting and installing the end part of the conductive arm 11 is arranged at the bottom of the bearing seat 41, after the upper end of the conductive arm 11 is inserted into the cavity of the bearing seat 41, the conductive arm 11 and the bearing seat 41 are fixed through a pair of fixing screws, threaded through holes for allowing the fixing screws to pass through are respectively arranged at two sides of the bearing seat 41, and threaded through holes for allowing the fixing screws to tamper are respectively arranged at two sides of the conductive arm 11.
The connecting pin shaft 43 and the cover body 4 are integrally formed, one side of the connecting pin shaft 43 passes through the rotating cam 42 and is fixed through the cover-shaped nut 45, an external thread structure matched with the cover-shaped nut 45 is arranged on the outer wall of the side of the connecting pin shaft 43, a threaded through hole for allowing the connecting pin shaft 43 to pass through is formed in the rotating cam 42, and the connecting pin shaft 43 passes through the threaded through hole in the rotating cam 42 and is fixed with the cover-shaped nut 45 through threads, so that the fixed connection between the rotating cam 42 and the cover body 4 is realized.
The other side of the connecting pin shaft 43 penetrates through the bearing seat 41 and then extends into the conductive arm 11, a cavity 111 for accommodating the extending and moving of the connecting pin shaft 43 is further formed in the end portion of the conductive arm 11, a ring-shaped bearing sleeve 46 is further arranged between the bearing seat 41 and the connecting pin shaft 43, an annular groove for accommodating the embedding and mounting of the bearing sleeve 46 is further formed in the circumferential outer wall of the connecting pin shaft 43, and an annular groove for accommodating the embedding and mounting of the bearing seat 41 is further formed in the circumferential outer wall of the bearing sleeve 46. The bearing sleeve 46 arranged between the bearing seat 41 and the connecting pin shaft 43 has the advantages that firstly, the bearing sleeve 46 plays a role in separating the bearing seat 41 from the connecting pin shaft 43, so that relative abrasion between the bearing seat 41 and the connecting pin shaft 43 caused by direct contact between the bearing seat 41 and the connecting pin shaft 43 is avoided, and in addition, the bearing sleeve 46 plays a certain role in limiting the relative position between the bearing seat 41 and the connecting pin shaft 43, and the influence on smooth relative rotation between the bearing seat 41 and the connecting pin shaft 43 caused by dislocation of the position between the bearing seat 41 and the connecting pin shaft 43 is avoided.
The reset torsion spring 44 is located in the cavity of the bearing seat 41 and sleeved on the outer wall of the connecting pin shaft 43, one side of the reset torsion spring 44 is fixed on the connecting pin shaft 43, a mounting pin shaft 47 for fixing the reset torsion spring 44 is further arranged on the connecting pin shaft 43, the other side of the reset torsion spring 44 is fixed on the bearing seat 41, and the two ice cover plates are closed through cooperation of the reset torsion spring 44.
Four fixing columns 48 for fixing the reset torsion spring 44 are arranged on the inner wall of the bearing seat 41, the fixing columns 48 are distributed on the outer side of the circumference of the connecting pin shaft 43, the centers of the fixing columns 48 are on the same circle, and the center of the circle is on the axis of the connecting pin shaft 43. The plurality of fixing posts 48 are arranged on the inner wall of the bearing seat 41, and the distribution of the fixing posts 48 is controlled, so that the torsion force of the reset torsion spring 44 is adjusted to a certain extent by changing the initial position of the reset torsion spring 44, and the stable reset force given to the ice-covering-preventing plate is ensured.
The cover body 4, the bearing seat 41, the rotating cams 42, the connecting pin shaft 43 and the reset torsion spring 44 are matched to realize the opening of the ice-covering-preventing cover plate through the mutual contact of the action sections 421 extending on the two rotating cams 42, and then the reset torsion spring 44 realizes the closing of the two ice-covering-preventing cover plates, so that an active driving part is not required to be used in the whole structure, and the rotating part is well protected through the design of the cover body 4, the bearing seat 41 and other parts sleeved outside, the phenomenon that the external ice and snow interfere with the rotating part to cause blocking and the like is avoided, and the smooth opening or closing of the ice-covering-preventing cover plate is ensured.
When the anti-icing scissor type isolating switch is in a brake separating state, the left anti-icing cover plate 3 and the right anti-icing cover plate 3 on the moving side are fixed above the moving contact 1 through the reset torsion spring 44, cover the clamping area of the moving contact 1, isolate rain and snow and the like, and play a role in preventing icing on the moving side in the brake separating state.
The suspension height of the static side ice-covering prevention cover should ensure that the moving side does not interfere with the moving side in the opening and closing process of the moving side.
The moving side is switched on to a certain angle, the moving sections 421 of the rotating cams 42 of the left and right anti-icing cover plates 3 of the moving side are contacted, the left and right rotating cams 42 and the anti-icing cover plates 3 overcome the force of the reset torsion spring to rotate outwards under the drive of the switching force of the conductive arms 11, and the clamping areas of the left and right moving contacts are exposed before the switching is in place, so that the state shown in fig. 12 and 13 is formed.
When the isolating switch is in a closing position, the left and right rotating cams 42 and the anti-icing cover plate 3 face outwards, the whole moving contact 1 and the fixed contact 2 are positioned below the static anti-icing cover, and the static anti-icing cover isolates rain and snow and the like, so that the anti-icing effect in a closing state is achieved.
The action of the opening process and the closing process is reversible.
In the closing process, the left and right rotating cams 42 are contacted with the moving contact 1 and the fixed contact 2; in the brake separating process, the left and right rotating cams 42 are separated from the moving contact 1 and the fixed contact 2. Therefore, on the premise of not influencing the clearance of the disconnecting insulation fracture of the isolating switch, the rotating cam material of the movable side anti-icing device can be changed into a conductive material, and the movable side anti-icing device is connected with the upper conductive pipe through soft connection and is used as a scissors type isolating switch arc striking device.
When the switch-off is carried out, after the movable contact 1 and the fixed contact 2 are covered with ice, the clamping force provided by the movable contact 1 and the fixed contact 2 is insufficient to damage an ice layer, so that the good switch-on contact of the movable contact 1 and the fixed contact 2 cannot be ensured, and manual deicing is time-consuming and labor-consuming.
According to the anti-icing scissor type isolating switch, the movable contact 1 is additionally provided with the resettable anti-icing cover plate 3, the fixed anti-icing cover is additionally arranged on the fixed contact 2, the anti-icing cover plate 3 on the movable contact 1 covers the clamp area of the movable contact when the equipment is opened, the movable contact 1 and the fixed contact 2 are automatically separated before closing, good closing contact of the movable contact 1 and the fixed contact 2 is ensured after closing in place, and the main functions of the anti-icing cover plate 3 and the anti-icing cover are used for preventing snow and rain from falling on the clamp area of the movable contact 1 and the fixed contact 2 to cause the clamp to be iced.
The anti-icing scissor type isolating switch is simple in structure and convenient to install, the transmission structure is sealed by the conductive arm 11, and the problems of transmission failure and the like caused by the fact that the transmission structure of the anti-icing structure is exposed and blocked by ice are avoided to the greatest extent.
When the device acts, the rotation of the anti-icing cover plate 3 at the moving contact 1 is completed through the switching-on action of the device, so that the clamping area of the moving contact 1 is yielded, the smooth switching-on contact of the moving contact 1 and the fixed contact 2 is ensured, and a transmission device is not required to be additionally arranged for the rotation of the anti-icing cover plate 3; when the brake is opened, the reset torsion spring 44 of the anti-icing cover plate 3 is utilized to finish the reset rotation of the anti-icing cover plate 3, so that the anti-icing cover plate 3 covers the clamping area of the movable contact 1 during brake opening, snow and water are isolated, and the anti-icing purpose is achieved.
The anti-icing scissor type isolating switch performs sealing treatment on the connecting pin shaft 43, the reset torsion spring 44 and the like by virtue of the conductive arm 11, separates snow and water, and avoids the problems of exposed icing blocking, transmission failure and the like of the transmission structure of the anti-icing device.
The anti-icing scissor type isolating switch can be used for preventing static and dynamic contacts of an outdoor high-voltage scissor type isolating switch from icing in cold ice and snow areas, can also be applied to all bus isolating switches which are vertically opened, and can provide reference for the design of anti-icing devices of other outdoor equipment by the principle of the anti-icing structure of the dynamic contacts.
The present invention is not limited in any way by the above-described preferred embodiments, but is not limited to the above-described preferred embodiments, and any person skilled in the art will appreciate that the present invention can be embodied in the form of a program for carrying out the method of the present invention, while the above disclosure is directed to equivalent embodiments capable of being modified or altered in some ways, it is apparent that any modifications, equivalent variations and alterations made to the above embodiments according to the technical principles of the present invention fall within the scope of the present invention.
Claims (3)
1. An anti-icing scissor type isolating switch is characterized in that: comprising
The movable contact and the fixed contact are matched with each other, the fixed contact is arranged below a wiring board, two sides of the wiring board are fixed with the fixed contact through the matching of an upper conductive clamp and an aluminum strand, the movable contact is arranged below the fixed contact and is respectively arranged on a pair of conductive arms which are connected in a scissor type, and the two conductive arms are driven by an operating mechanism to swing and drive the movable contact to approach or be far away from the fixed contact;
The first anti-icing unit is arranged at the static contact and comprises an anti-icing cover arranged on the upper conductive clamp, and the anti-icing cover is positioned above the static contact and covers the whole static contact;
The connection between the anti-icing cover and the upper conductive clamp is as follows: two sides of the ice-covering prevention cover are respectively fixed with the upper conductive clamp through a pair of hanging steel wire ropes, the two hanging steel wire ropes positioned on the same side of the ice-covering prevention cover are distributed in a splayed shape, the top ends of the hanging steel wire ropes are fixed with the upper conductive clamp through first steel wire rope locks, the bottom ends of the hanging steel wire ropes penetrate through the ice-covering prevention cover and are fixed through second steel wire rope locks, and through holes for allowing the hanging steel wire ropes to penetrate through are formed in the ice-covering prevention cover;
The ice-covering-preventing cover is provided with two through holes which are used for allowing the same hanging steel wire rope to pass through, the two through holes are sequentially defined as a first through hole and a second through hole, the first through hole is positioned at the outer side, the second through hole is positioned at the inner side, and the hanging steel wire rope passes through the first through hole from top to bottom, then passes through the second through hole from bottom to top, and is fixed through the cooperation of a second steel wire rope lock catch;
the ice-covering prevention cover is of an inverted U-shaped structure formed by jointly connecting a horizontal plate positioned above the static contact and inclined plates connected to two sides of the horizontal plate, the horizontal plate extends along the long axis square of the static contact, and the inclined direction of the inclined plate gradually inclines downwards from the joint of the inclined plate and the horizontal plate;
The second anti-icing unit is arranged at the moving contact and comprises anti-icing cover plates which are arranged at the end parts of the conductive arms and cover the whole moving contact, and the two anti-icing cover plates are opened or closed along with the action of the conductive arms to realize the protection of the moving contact or the protection of the moving contact;
The ice-covering-preventing cover plate is formed by jointly connecting a middle plate which is arranged vertically and positioned in the middle position with inclined side plates which are vertically connected to two sides of the middle plate, and the inclined direction of the inclined side plates is gradually inclined from the connecting side of the inclined side plates and the middle plate to the direction close to the moving contact;
The action fit between the anti-icing cover plate and the conductive arm is as follows: the anti-icing cover plate is fixed on a follow-up cover, and the follow-up cover is sleeved at the end part of one side of the conductive arm, on which the movable contact is arranged, and is movably connected with the conductive arm;
The follow-up cover comprises a cover main body, a bearing seat, a rotating cam, a connecting pin shaft and a reset torsion spring, wherein the cover main body is fixedly connected with the upper side of the anti-icing cover plate, and the rotating cam, the cover main body and the bearing seat are sequentially distributed at the end part of the conductive arm and are connected through the connecting pin shaft;
the rotary cams are provided with action sections which extend outwards from the cover body, the action sections are arc-shaped, the action sections of the rotary cams on the two follow-up cover covers are distributed relatively, and after the conducting arm is switched on, the action sections of the two rotary cams are contacted with each other and drive the cover body to rotate, so that the opening action of the two anti-icing cover plates is realized;
The cover body is of a hollow disc structure with an opening at the lower end, a cavity for accommodating the bearing seat to extend into is formed in the bottom of the cover body, and a gap is reserved between the outer wall of the bearing seat and the inner wall of the cover body;
the bearing seat is of a hollow cylindrical structure with an opening at the lower end, a cavity for accommodating the insertion and installation of the end part of the conductive arm is arranged at the bottom of the bearing seat, and the conductive arm is fixed through a pair of fixing screws after being inserted into the cavity of the bearing seat;
The connecting pin shaft and the cover cap main body are integrally formed, one side of the connecting pin shaft penetrates through the rotating cam and then is fixed through the cap nut, the other side of the connecting pin shaft penetrates through the bearing seat and then extends into the conductive arm, and a cavity for accommodating the connecting pin shaft to extend into and move is formed at the end part of the conductive arm;
the reset torsion spring is positioned in the cavity of the bearing seat and sleeved on the outer wall of the connecting pin shaft, one side of the reset torsion spring is fixed on the connecting pin shaft, the other side of the reset torsion spring is fixed on the bearing seat, and the two ice-covering-preventing cover plates are closed through the cooperation of the reset torsion spring.
2. The anti-icing scissor disconnector according to claim 1, characterized in that: the inner wall of the bearing seat is provided with a plurality of mounting columns used for fixing the reset torsion springs, each mounting column is distributed on the outer side of the circumference of the connecting pin shaft, the centers of the mounting columns are on the same circle, and the center of the circle is on the axis of the connecting pin shaft.
3. The anti-icing scissor disconnector according to claim 1, characterized in that: a ring-shaped bearing sleeve is further arranged between the bearing seat and the connecting pin shaft, an annular groove for accommodating the bearing sleeve in an embedded mode is further formed in the circumferential outer wall of the connecting pin shaft, and an annular groove for accommodating the bearing seat in an embedded mode is further formed in the circumferential outer wall of the bearing sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410819408.5A CN118380279B (en) | 2024-06-24 | 2024-06-24 | Anti-icing scissor type isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410819408.5A CN118380279B (en) | 2024-06-24 | 2024-06-24 | Anti-icing scissor type isolating switch |
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| Publication Number | Publication Date |
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| CN118380279A CN118380279A (en) | 2024-07-23 |
| CN118380279B true CN118380279B (en) | 2024-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410819408.5A Active CN118380279B (en) | 2024-06-24 | 2024-06-24 | Anti-icing scissor type isolating switch |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021719A (en) * | 2012-12-03 | 2013-04-03 | 江苏省如高高压电器有限公司 | Ice-melting isolating switch |
| CN108604511A (en) * | 2016-02-26 | 2018-09-28 | Abb瑞士股份有限公司 | Disconnecting switch with anti-icing equipment |
-
2024
- 2024-06-24 CN CN202410819408.5A patent/CN118380279B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021719A (en) * | 2012-12-03 | 2013-04-03 | 江苏省如高高压电器有限公司 | Ice-melting isolating switch |
| CN108604511A (en) * | 2016-02-26 | 2018-09-28 | Abb瑞士股份有限公司 | Disconnecting switch with anti-icing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118380279A (en) | 2024-07-23 |
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