CN111161964B - Static contact and high-voltage switch - Google Patents
Static contact and high-voltage switch Download PDFInfo
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- CN111161964B CN111161964B CN201911415761.2A CN201911415761A CN111161964B CN 111161964 B CN111161964 B CN 111161964B CN 201911415761 A CN201911415761 A CN 201911415761A CN 111161964 B CN111161964 B CN 111161964B
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- 230000003068 static effect Effects 0.000 title claims abstract description 95
- 230000001629 suppression Effects 0.000 claims abstract description 46
- 238000003780 insertion Methods 0.000 claims abstract description 12
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- 229910052751 metal Inorganic materials 0.000 claims description 4
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- 241001330002 Bambuseae Species 0.000 description 5
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- 239000011425 bamboo Substances 0.000 description 5
- 241000446313 Lamella Species 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 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
- 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
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
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- Circuit Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a static contact and a high-voltage switch, wherein the static contact comprises: the arc striking shield cover is sleeved outside the arc extinguishing coil and comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends inwards in the radial direction, the flange is shielded at the front end of the conductive contact finger, and the inner wall surface of the flange is surrounded into a through hole which is coaxial with the insertion hole and is used for the movable contact rod to pass through; the arc striking shield cover is relatively fixed with the static contact base, and the arc extinguishing device further comprises an arc extinguishing coil, one end of the arc extinguishing coil is electrically connected with the arc striking shield cover, and the other end of the arc extinguishing coil is electrically connected with the static contact base; the arc striking shield covers the static contact seat, the conductive contact finger and the arc suppression coil in the static contact, so that the electric field in the static contact is more balanced, and the point discharge phenomenon of the static contact is avoided.
Description
Technical Field
The invention belongs to the technical field of high-voltage electrical equipment devices, and particularly relates to a static contact and a high-voltage switch.
Background
With the continuous development of the power industry, sulfur hexafluoride gas insulated fully-enclosed power distribution devices (GIS for short) are widely applied in the power field as important electrical equipment, and high-voltage switches are used as important components of the GIS, so that the performance of the high-voltage switches has an important influence on the GIS.
Because high-voltage switch often bears great voltage and electric current, the fracture position often has the arc phenomenon of drawing in the divide-shut brake in-process, in order to avoid electric arc to cause great injury to the contact, high-voltage switch among the prior art is provided with arc extinction structure more in fracture position department. For example, the chinese patent application with publication number CN106960755A discloses a contact system and a single-pole arc-extinguishing chamber and a load switch using the same, wherein the contact system includes a stationary contact seat, a petal-shaped contact finger is provided on the stationary contact seat, an insulating support is provided at the periphery of the petal-shaped contact finger, an arc-extinguishing coil is provided on the insulating support, and an arc-extinguishing plate is fixed at one end of the insulating support. When moving contact and static contact draw the arc, the arc that produces can run on the arc extinguishing dish, then the arc can flow through arc suppression coil, through the electromagnetic induction principle, produces magnetic field in insulating support, under the effect of lorentz force, this magnetic field can drive the arc and make circumferential direction rotary motion along the arc extinguishing dish to the energy of dissipation arc, and extinguish arc in the short time of current zero crossing, thereby avoid the arc to burn on the stationary contact and ablate the contact, guarantee to cut off successfully. The arc extinguishing plate of the switch is provided with the flaring structure at one end facing the moving contact, the structural design easily causes uneven distribution of an electric field in the static contact, the electric field shielding effect is poor, and the switch is easily subjected to point discharge.
Disclosure of Invention
The invention aims to provide a static contact to solve the problem of uneven electric field inside the static contact in the prior art, and also provides a high-voltage switch to solve the problem of uneven electric field inside the static contact of the high-voltage switch in the prior art.
In order to achieve the above purpose, the technical scheme of the static contact of the invention is as follows:
a stationary contact, comprising:
a stationary contact base;
the conductive contact finger is arranged on the static contact seat and is provided with an inserting hole for inserting the movable contact rod to realize inserting;
the arc suppression coil surrounds the outer side of the conductive contact finger;
the arc striking shield cover comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, the flange shields the front end of the conductive contact finger, the arc extinguishing coil and the static contact seat are wrapped in the arc striking shield cover, and the inner wall surface of the flange is surrounded into a through hole which is coaxial with the insertion hole and used for the movable contact rod to pass through;
the arc striking shielding cover and the static contact base are relatively fixed;
one end of the arc suppression coil is electrically connected with the arc striking shield cover, the other end of the arc suppression coil is electrically connected with the static contact seat, when the moving contact and the static contact are subjected to arc discharge, current is led to the static contact seat through the arc suppression coil, and the arc suppression coil generates an arc suppression magnetic field inside the arc suppression coil.
Has the advantages that: the arc striking shield cover comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, and the arc striking shield cover wraps the arc suppression coil, the static contact seat and the conductive contact finger inside the arc striking shield cover, so that the electric field inside the arc striking shield cover is more balanced, and the phenomenon of point discharge of the static contact is avoided.
Furthermore, a supporting structure is fixed on the static contact seat, the supporting structure is positioned between the arc suppression coil and the conductive contact finger and separates the arc suppression coil and the conductive contact finger, and a flange of the arc striking shielding cover is fixed on the supporting structure so as to realize relative fixation with the static contact seat.
Has the advantages that: the arc suppression coil and the conductive contact finger are separated, and meanwhile, the arc striking shielding cover is conveniently fixed.
Furthermore, the supporting structure is a metal support, a counter bore is arranged on a flange of the arc striking shielding cover and is connected with the front end of the supporting structure through a connecting screw penetrating in the counter bore, and an insulating structure is arranged at the connecting position of the supporting structure and the flange of the arc striking shielding cover.
Has the beneficial effects that: the insulating structure is arranged between the supporting structure and the arc striking shielding cover to realize the insulating isolation between the arc striking shielding cover and the supporting structure, so that the arc striking shielding cover and the static contact base are prevented from being in conductive connection through the supporting structure to cause short circuit to the arc extinguishing coil.
The support structure is a support cylinder.
Has the advantages that: make things convenient for arc suppression coil's winding on the one hand, on the other hand bearing structure adopts a support section of thick bamboo, compares in the support column that the interval set up, and the wholeness can be better, and intensity is higher, makes bearing structure provide reliable support to the striking shield cover in circumference.
Furthermore, the outer side surface of the rear part of the support cylinder is provided with a vertically extending long groove, the wall of the rear side groove of the long groove is provided with a screw through hole, and the support cylinder is connected with the static contact seat through a screw which is arranged in the screw through hole in a penetrating manner.
Has the advantages that: on the premise of arranging the fixing screw, the long groove can be used for accommodating the screw, so that the radial size of the static contact is reduced as much as possible.
An insulating part is clamped between the rear part of the arc striking shielding cover and the static contact seat or the rear part of the arc striking shielding cover and the static contact seat are arranged at intervals and are insulated through air.
Has the advantages that: the conductive connection between the rear part of the arc striking shielding cover and the static contact base is avoided, so that short circuit is caused to the arc extinguishing coil.
In order to achieve the purpose, the technical scheme of the high-voltage switch is as follows:
high voltage switch, including the moving contact, still include with the static contact of moving contact adaptation, wherein, the static contact includes:
a stationary contact, comprising:
a stationary contact base;
the conductive contact finger is arranged on the static contact seat and is provided with an insertion hole for inserting the movable contact rod to realize insertion;
the arc suppression coil surrounds the outer side of the conductive contact finger;
the arc striking shield cover comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, the flange shields the front end of the conductive contact finger, the arc extinguishing coil and the static contact seat are wrapped in the arc striking shield cover, and the inner wall surface of the flange is surrounded into a through hole which is coaxial with the insertion hole and used for the movable contact rod to pass through;
the arc striking shielding cover and the static contact base are relatively fixed;
one end of the arc suppression coil is electrically connected with the arc striking shield cover, the other end of the arc suppression coil is electrically connected with the static contact seat, when the moving contact and the static contact are subjected to arc discharge, current is led to the static contact seat through the arc suppression coil, and the arc suppression coil generates an arc suppression magnetic field inside the arc suppression coil.
Has the advantages that: the arc striking shield cover comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, and the arc extinguishing coil, the static contact seat and the conductive contact finger are wrapped inside the arc striking shield cover, so that an electric field inside the arc striking shield cover is more balanced, and the phenomenon of point discharge of the static contact of the high-voltage switch is avoided.
Furthermore, a supporting structure is fixed on the static contact seat, the supporting structure is positioned between the arc suppression coil and the conductive contact finger and separates the arc suppression coil and the conductive contact finger, and a flange of the arc striking shielding cover is fixed on the supporting structure so as to realize relative fixation with the static contact seat.
Has the advantages that: the arc suppression coil and the conductive contact finger are separated, and meanwhile, the arc striking shielding cover is conveniently fixed.
Furthermore, the supporting structure is a metal support, a counter bore is arranged on a flange of the arc striking shielding cover and is connected with the front end of the supporting structure through a connecting screw penetrating in the counter bore, and an insulating structure is arranged at the connecting position of the supporting structure and the flange of the arc striking shielding cover.
Has the advantages that: the insulation structure is arranged between the supporting structure and the arc striking shielding cover to realize insulation isolation between the arc striking shielding cover and the supporting structure, so that the arc striking shielding cover and the static contact base are prevented from being conductively connected through the supporting structure to cause short circuit to the arc extinguishing coil.
The support structure is a support cylinder.
Has the advantages that: make things convenient for arc suppression coil's winding on the one hand, on the other hand bearing structure adopts a support section of thick bamboo, compares in the support column that the interval set up, and the wholeness can be better, and intensity is higher, makes bearing structure provide reliable support to the striking shield cover in circumference.
Furthermore, the outer side surface of the rear part of the support cylinder is provided with a vertically extending long groove, the wall of the rear side groove of the long groove is provided with a screw through hole, and the support cylinder is connected with the static contact seat through a screw which is arranged in the screw through hole in a penetrating manner.
Has the advantages that: on the premise of arranging the fixing screw, the long groove can be used for accommodating the screw, so that the radial size of the static contact is reduced as much as possible.
And an insulating part is clamped between the rear part of the arc striking shielding cover and the static contact seat or the rear part of the arc striking shielding cover and the static contact seat are arranged at intervals and are insulated through air.
Has the advantages that: the conductive connection between the rear part of the arc striking shielding cover and the static contact base is avoided, so that short circuit is caused to the arc extinguishing coil.
Drawings
FIG. 1 is a schematic diagram of a high voltage switch according to the present invention;
fig. 2 is a schematic structural diagram of a stationary contact in the high voltage switch in fig. 1.
In the figure: 1-arc striking shield cover; 2-a first insulating ring; 3-petal-shaped contact fingers; 4-stationary contact seat; 5, tightly holding the spring; 6-a set screw; 7-a first insulating sleeve; 8-wear resistant pad; 9-arc suppression coil; 10-a support cylinder; 11-a second insulating ring; 12-a second insulating sleeve; 13-a connection screw; 20-moving contact; 21-a static contact; 22-an insulator; 23-a housing; 24-isolating grounding switch.
Detailed Description
The embodiments of the high voltage switch according to the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the high-voltage switch of the present invention is described by taking a three-phase gas-insulated metal-enclosed switchgear as an example, but the high-voltage switch of the present invention is not limited to the switch described in the present embodiment, and may be a dc high-voltage switch in another embodiment.
The three-phase gas-insulated metal-enclosed combined switch device of the present embodiment is shown in fig. 1, and includes a housing 23 and an isolated ground switch 24 assembled in the housing 23, wherein the housing is filled with a mixed gas as a medium for insulation and arc extinction, the housing of the high-voltage switch is connected with an insulator 22, the high-voltage switch includes a moving contact 20 and a static contact 21 adapted to the moving contact 20, wherein the moving contact 20 includes a moving contact rod, and when the moving contact 20 and the static contact 21 are in an insertion state and the isolated ground switch is in an isolation position, the high-voltage switch is in an isolation state.
The static contact is mainly improved, and the specific structure of the static contact is shown in fig. 2, the static contact 21 includes a static contact base 4 and a conductive contact finger installed on the static contact base 4, the conductive contact finger has an insertion hole for inserting the movable contact rod, the conductive contact finger is enclosed by a flap-shaped contact finger 3, the flap-shaped contact finger 3 is arranged around the same circumference, and the middle part of the conductive contact finger encloses an insertion hole for inserting the movable contact 20.
The static contact 21 further comprises an arc striking shield cover 1, the arc striking shield cover 1 comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, the flange is shielded at the front end of the petal-shaped contact finger 3, and the inner wall surface of the flange is enclosed into a through hole which is coaxial with the insertion hole and is used for the movable contact rod to pass through. Still be provided with bearing structure on the stationary contact seat 4 fixedly, in this embodiment, bearing structure is a support section of thick bamboo 10, and a support section of thick bamboo 10 sets up in the outside of lamella form contact finger 3, makes things convenient for the winding of arc suppression coil 9 on the one hand, and a support section of thick bamboo 10 can provide reliable support to striking shield cover 1 on the other hand. The outer side of the support structure is sleeved with an arc suppression coil 9, so that the support structure is positioned between the arc suppression coil 9 and the conductive contact finger and separates the two. And the arc extinguishing coil 9 and the static contact seat 4 are wrapped inside the arc striking shielding cover 1, and the outer edge of the arc striking shielding cover 1 is arranged in a round angle mode, so that the outer wall surface of the arc striking shielding cover 1 forms an equipotential surface, and the effect of balancing the electric field inside the static contact 21 can be achieved.
The arc suppression coil 9 is composed of enameled wires and crimping terminals at two ends, one end of the arc suppression coil 9 is electrically connected with the flange of the arc striking shielding cover 1, and the other end of the arc suppression coil 9 is electrically connected with the static contact base 4 through the supporting cylinder 10, so that the flange of the arc striking shielding cover 1, the arc suppression coil 9, the supporting cylinder 10 and the static contact base 4 jointly form a loop. When the high-voltage switch-off current flows, the movable contact 20 moves out of the fixed contact 21 and is separated from the petal-shaped contact fingers 3, a part of an electric arc between the movable contact 20 and the fixed contact 21 can move to the arc suppression coil 9 through a flange of the arc striking shielding cover 1, then a conductive loop can be formed among the arc striking shielding cover 1, the arc suppression coil 9 and the fixed contact seat 4, a magnetic field is generated in the arc suppression coil 9 through the electromagnetic induction principle, the magnetic field can drive the electric arc to rotate at a high speed under the action of Lorentz force, the electric arc of the flange of the arc striking shielding cover 1 is rapidly extinguished, the electric arc is prevented from burning on the fixed contact 21 to ablate the contact, and the successful switch-off of the electric arc is guaranteed.
The flange of the arc striking shield cover 1 is fixedly connected with the front end of a support cylinder 10, and the static contact seat 4 and the arc striking shield cover 1 are prevented from being electrically connected through the support cylinder 10 by an insulating structure, in this embodiment, the insulating structure is a second insulating sleeve 12 and a second insulating ring 11, specifically, eight counter bores are uniformly distributed on the flange of the arc striking shield cover 1, connecting screws 13 are arranged in the counter bores in a penetrating manner, the second insulating sleeve 12 is further arranged in the counter bores and used for realizing the insulating isolation between the arc striking shield cover 1 and the connecting screws 13, the second insulating ring 11 is clamped between the rear side surface of the flange of the arc striking shield cover 1 and the front end surface of the support cylinder 10 and used for realizing the insulating isolation between the arc striking shield cover 1 and the support cylinder 10, and the connecting screws 13 penetrating through the counter bores penetrate through the second insulating ring 11 to realize the fixed connection between the flange of the arc striking shield cover 1 and the support cylinder 10, the flange of the arc striking shielding case 1 is made of copper alloy, can resist high temperature and arc ablation, and the supporting cylinder is made of aluminum alloy, so that the supporting cylinder is light in weight and high in structural strength.
In order to avoid the short circuit of the arc-extinguishing coil 9 caused by the electrical connection between the arc-striking shielding case 1 and the static contact base 4, an insulating member is disposed between the arc-striking shielding case 1 and the static contact base 4, and in this embodiment, the insulating member is the first insulating sleeve 7. The arc striking shield cover 1 and the static contact base 4 are fixedly connected through a fixing structure, four round holes are uniformly distributed on the outer peripheral surface of the rear portion of the arc striking shield cover 1, and insulating screws penetrate through the round holes in the arc striking shield cover 1 and insulating pieces to fixedly connect the arc striking shield cover 1 and the static contact base 4.
The rear part of the support cylinder 10 is fixedly connected with the static contact base 4 through eight fixing screws 6, the outer side surface of the rear part of the support cylinder 10 is provided with a vertically extending long groove, the wall of the rear side of the long groove is provided with a screw through hole, and the support cylinder 10 is connected with the static contact base 4 through the fixing screw 6 which is arranged in the screw through hole in a penetrating manner. Thus, on the premise of arranging the fixing screw 6, the long groove can accommodate the fixing screw 6, so that the radial dimension of the static contact 21 is reduced as much as possible.
The periphery of the petal-shaped contact finger 3 is provided with the holding spring 5, so that the petal-shaped contact finger 3 can be ensured to have enough contact force when being inserted into the movable contact rod, and the bottom of the petal-shaped contact finger 3 can be tightly hooped on the static contact seat 4. In order to avoid friction between the petal-shaped contact fingers 3 and the static contact seat 4, a wear pad 8 is clamped between the bottom of the petal-shaped contact fingers 3 and the static contact seat 4, and a first insulating ring 2 is arranged between the top end of the petal-shaped contact fingers 3 and the rear side surface of the flange of the arc striking shielding cover 1, so that the arc striking shielding cover 1 and the petal-shaped contact fingers 3 are insulated and isolated. In this embodiment, the material of lamella form feeler is copper, and the surface is silvered, has good electric conductive property, and in other embodiments, the material of lamella form feeler is copper, and the top of lamella form feeler is brazed has resistant copper depressed place contact of ablating.
In this embodiment, the first insulating ring, the second insulating ring, the first insulating sleeve, the second insulating sleeve, and the wear pad are all made of teflon.
In this embodiment, a support structure is fixed on the stationary contact base, the support structure is located between the arc suppression coil and the conductive contact finger and separates the arc suppression coil and the conductive contact finger, and a flange of the arc striking shield is fixed on the support structure to realize relative fixation with the stationary contact base.
In the embodiment, the supporting structure is a metal support, the flange of the arc striking shield is provided with a counter bore and is connected with the front end of the supporting structure through a connecting screw penetrating in the counter bore, the supporting structure and the flange of the arc striking shield are provided with an insulating structure at the connecting position, in other embodiments, the supporting structure can be set as an insulating supporting structure, at the moment, the front end of the insulating supporting structure is directly and fixedly connected with the flange of the arc striking shield, the rear end of the insulating supporting structure is directly and fixedly connected with the static contact seat, so that the flange of the arc striking shield can be prevented from being electrically connected with the static contact seat through the supporting structure, or the flange of the arc striking shield is provided with the counter bore and is connected with the front end of the supporting structure through the connecting screw penetrating in the counter bore, the rear end of the supporting structure is provided with a turning edge, the counter bore is arranged on the turning edge and is connected with the static contact seat through the connecting screw penetrating in the counter bore, and an insulating sleeve is arranged in the counter bore, and an insulating ring is arranged between the rear end of the supporting structure and the static contact seat, so that the flange of the arc striking shielding cover is prevented from being electrically connected with the static contact seat through the supporting structure.
In this embodiment, the supporting structure is a supporting cylinder, and in other embodiments, the supporting structure may also be a plurality of supporting columns arranged at intervals in the circumferential direction.
In the embodiment, the outer side surface of the rear part of the support cylinder is provided with a vertically extending long groove, the lower side groove wall of the long groove is provided with a screw through hole, the support cylinder is connected with the static contact seat through a screw which is arranged in the screw through hole in a penetrating manner, in other embodiments, the outer side surface of the rear part of the support cylinder is not provided with the vertically extending long groove, the rear end of the support cylinder is provided with a connecting flange, and a fixing screw penetrates through the through hole on the connecting flange and the through hole on the static contact seat, so that the support cylinder is fixedly connected with the static contact seat.
In this embodiment, the insulating member is interposed between the rear portion of the arc striking shield and the stationary contact base, and in other embodiments, the insulating member may not be disposed between the rear portion of the arc striking shield and the stationary contact base, but the rear portion of the arc striking shield and the stationary contact base are disposed at an interval, and the insulation therebetween is achieved by air.
In this embodiment, the conductive contact fingers are petal-shaped contact fingers, and in other embodiments, the conductive contact fingers may also be spring contact fingers; or the conductive contact finger can also be a cylindrical structure embedded with the conductive contact finger.
In this embodiment, the insulating structure is a second insulating sleeve and a second insulating ring, in other embodiments, the insulating structure is an insulating screw and a second insulating ring, and the flange of the arc striking shield and the front end of the support cylinder are fixedly connected by the insulating screw.
In this embodiment, eight counter bores are uniformly distributed on the flange of the arc striking shield, and in other embodiments, two, three, four, or five counter bores are arranged on the flange of the arc striking shield.
In this embodiment, the rear portion of the support cylinder is fixedly connected with the stationary contact base through eight fixing screws, and in other embodiments, the rear portion of the support cylinder is fixedly connected with the stationary contact base through two, three, four or five fixing screws.
In this embodiment, four round holes are uniformly distributed on the outer peripheral surface of the rear portion of the arc striking shielding cover, and in other embodiments, two, three or more than five round holes are uniformly distributed on the outer peripheral surface of the rear portion of the arc striking shielding cover.
In the specific embodiment of the static contact of the invention, the specific structure of the static contact is the same as that of the high-voltage switch, and the detailed description is omitted.
Claims (6)
1. The static contact, characterized by includes:
a stationary contact base;
the conductive contact finger is arranged on the static contact seat and is provided with an insertion hole for inserting the movable contact rod to realize insertion;
the arc suppression coil surrounds the outer side of the conductive contact finger;
the arc striking shield cover comprises a cylindrical base body and a flange which is arranged at the front end of the cylindrical base body and extends radially inwards, the flange shields the front end of the conductive contact finger, the arc extinguishing coil and the static contact seat are wrapped in the arc striking shield cover, and the inner wall surface of the flange is surrounded into a through hole which is coaxial with the insertion hole and used for the movable contact rod to pass through;
the arc striking shielding cover and the static contact base are relatively fixed;
one end of the arc suppression coil is electrically connected with the arc striking shield, the other end of the arc suppression coil is electrically connected with the static contact seat, when the moving contact and the static contact are subjected to arc striking, current is led to the static contact seat through the arc suppression coil, and the arc suppression coil generates an arc suppression magnetic field inside the arc suppression coil;
an insulating part is clamped between the rear part of the arc striking shielding cover and the static contact seat or the rear part of the arc striking shielding cover and the static contact seat are arranged at intervals and are insulated through air.
2. The stationary contact as set forth in claim 1 wherein a support structure is secured to the stationary contact base and is disposed between and separates the arc suppression coil and the conductive contact finger, the flange of the arc initiation shield being secured to the support structure to provide a fixed relationship with the stationary contact base.
3. The static contact as claimed in claim 2, wherein the support structure is a metal support, the flange of the arc striking shield has a counterbore and is connected to the front end of the support structure by a connecting screw inserted into the counterbore, and the support structure and the flange of the arc striking shield are provided with an insulating structure at the connecting position.
4. A stationary contact according to claim 2 or 3, characterized in that the support structure is a support cylinder.
5. The stationary contact as claimed in claim 4, wherein the outer side of the rear portion of the supporting cylinder is provided with a vertically extending elongated slot, the rear side wall of the elongated slot is provided with a screw through hole, and the supporting cylinder is connected to the stationary contact base by a screw inserted into the screw through hole.
6. A high-voltage switch is characterized by comprising a movable contact and a fixed contact matched with the movable contact and described in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415761.2A CN111161964B (en) | 2019-12-31 | 2019-12-31 | Static contact and high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415761.2A CN111161964B (en) | 2019-12-31 | 2019-12-31 | Static contact and high-voltage switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111161964A CN111161964A (en) | 2020-05-15 |
| CN111161964B true CN111161964B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911415761.2A Active CN111161964B (en) | 2019-12-31 | 2019-12-31 | Static contact and high-voltage switch |
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| CN (1) | CN111161964B (en) |
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| CN113223892A (en) * | 2021-05-25 | 2021-08-06 | 上海电器科学研究所（集团）有限公司 | Quick vacuum arc control device that does not have spring |
| CN114429879B (en) * | 2021-12-16 | 2024-03-22 | 河南平高电气股份有限公司 | Isolation static contact and three-station isolation grounding switch |
| CN114649161B (en) * | 2021-12-16 | 2024-04-05 | 河南平高电气股份有限公司 | Three-station isolation grounding switch and isolation static contact |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776854A (en) * | 2005-12-09 | 2006-05-24 | 王季梅 | Breaker of large-capacity vacuum short-cut current |
| CN106128851A (en) * | 2016-06-30 | 2016-11-16 | 西安交通大学 | The compound vertical Magnet core type structure of contact terminal of a kind of novel two plate and vacuum interrupter |
| CN107887184A (en) * | 2017-11-23 | 2018-04-06 | 许继（厦门）智能电力设备股份有限公司 | Earthed switch contact |
| CN108172459A (en) * | 2017-12-28 | 2018-06-15 | 毛红玲 | A kind of moving contact for extra-high voltage vacuum interrupter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217076B (en) * | 2007-12-30 | 2011-01-19 | 人民电器集团有限公司 | AC contactor arc control device |
| CN201717175U (en) * | 2010-07-19 | 2011-01-19 | 福州天宇电气股份有限公司 | High-voltage load switch arc-extinguishing chamber provided with contact shielding cover |
| FR2979744B1 (en) * | 2011-09-01 | 2015-05-01 | Socomec Sa | ELECTRIC CUTTING APPARATUS WITH HIGH CLOSING POWER |
| CN204289253U (en) * | 2014-12-03 | 2015-04-22 | 中国西电电气股份有限公司 | Gas-insulated switchgear and pressure-operated load switch arc control device thereof |
| CN204680979U (en) * | 2015-06-03 | 2015-09-30 | 厦门华电开关有限公司 | A kind of shielding construction |
| CN205282331U (en) * | 2016-01-08 | 2016-06-01 | 常熟开关制造有限公司(原常熟开关厂） | Low -voltage circuit breaker arc -Quenching system |
| CN106960755B (en) * | 2017-04-05 | 2019-05-03 | 平高集团有限公司 | A kind of contact system and monopole arc-chutes and on-load switch using the contact system |
-
2019
- 2019-12-31 CN CN201911415761.2A patent/CN111161964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776854A (en) * | 2005-12-09 | 2006-05-24 | 王季梅 | Breaker of large-capacity vacuum short-cut current |
| CN106128851A (en) * | 2016-06-30 | 2016-11-16 | 西安交通大学 | The compound vertical Magnet core type structure of contact terminal of a kind of novel two plate and vacuum interrupter |
| CN107887184A (en) * | 2017-11-23 | 2018-04-06 | 许继（厦门）智能电力设备股份有限公司 | Earthed switch contact |
| CN108172459A (en) * | 2017-12-28 | 2018-06-15 | 毛红玲 | A kind of moving contact for extra-high voltage vacuum interrupter |
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|---|---|
| CN111161964A (en) | 2020-05-15 |
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