CN213212041U - High-voltage outdoor vacuum switch with isolating switch - Google Patents
High-voltage outdoor vacuum switch with isolating switch Download PDFInfo
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- CN213212041U CN213212041U CN202022614693.7U CN202022614693U CN213212041U CN 213212041 U CN213212041 U CN 213212041U CN 202022614693 U CN202022614693 U CN 202022614693U CN 213212041 U CN213212041 U CN 213212041U
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- switch
- insulator
- isolator
- isolating switch
- vacuum switch
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model provides an outdoor vacuum switch of high pressure with isolator, including vacuum switch, one side of vacuum switch is equipped with the isolator rather than being connected, vacuum switch and isolator are all fixed in the insulator, isolator sets up in the isolator cavity of insulator, isolator includes the rotation type isolator moving contact, the both sides of isolator moving contact are equipped with inlet wire side static contact and the side static contact of being qualified for the next round of competitions respectively. The utility model provides an outdoor vacuum switch of high pressure has reduced the volume by a wide margin, has reduced the cost, and is simple, safe, reliable.
Description
Technical Field
The utility model relates to an outdoor vacuum switch of high pressure (3.6kV ~ 40.5kV), especially outdoor totally enclosed, the high-pressure vacuum switch of full insulation with isolator.
Background
At present, the well-known high-voltage outdoor vacuum switch with a disconnecting switch has the following characteristics:
the volume is reduced by adopting a gas medium to strengthen the insulation between charged bodies and between grounds. This brings about the following problems:
a. the gas used is mostly SF6Gas or dry air (N)2+O2)，SF6The gas has great adverse effect on the environment and is the gas which is limited by the environmental protection convention and is discharged. Dry air (generally 78% nitrogen and 22% oxygen) cannot be directly obtained, and is synthesized after air is manually separated, so that the process is complicated and the cost is high;
b. as the ambient temperature changes, the pressure of the gas within the enclosure will also change, and if the seal is not tight, it will leak. The concentration of the leaked gas is reduced, the insulation performance is influenced, and the safety is endangered;
c. as long as the air is not available, the air cannot be supplemented on the site easily, and the maintenance is difficult.
Secondly, the insulation between the charged bodies and the ground is enhanced by adopting partial solid insulating materials, so that the volume is reduced. This brings about the following problems:
a. the solid insulation and the air insulation exist between conductors of each phase and between the conductors of each phase and the ground, and the electric field has different field strengths due to different dielectric constants in different media, and is strong in the air and weak in a solid insulation medium. On the contrary, the air tolerance electric field intensity is low, the solid insulating medium is high, and the air gap is caused to generate partial discharge to further break down, so that accidents are caused;
b. the cost is high due to the excessive types of the insulating parts;
c. the effect of reducing the volume is limited.
Thirdly, air is used as an insulating medium between charged bodies and between the charged bodies and the ground, and finally, the charged bodies and the ground are sealed. This brings about the following problems:
a. enough clearance is needed to ensure enough insulation strength, so that the whole switch device is large in size;
b. the switch equipment is large in size, and the cost is inevitably high;
c. once the sealing is not good, internal condensation can be caused, and not only can the metal part be rusted, but also insulation breakdown can be caused.
SF adopted for built-in isolating switch fracture insulation6The gas, although occupying a small volume, can pollute the environment. Although the liquid insulating material is small in volume, the liquid insulating material has the possibility of leakage, aging and low-temperature curing, and the normal use is influenced. By dry air insulation (N)2+O2) Certain pressure is needed to maintain certain insulation performance, and once the density loss pressure is reduced, the insulation safety is endangered due to insufficient insulation performance. If the conventional air insulation is adopted, although the air insulation is safe and reliable, the problems of overlarge volume and overhigh cost can be caused if no special design scheme is adopted.
No matter which scheme is adopted, as long as the isolating switch is arranged, no matter the isolating switch is arranged internally or externally, and then a power transformer, a voltage transformer (including a protective winding), a current transformer, a zero-sequence current transformer, a lightning arrester and the like are added, the size is larger, and even the isolating switch cannot be installed. If these additional equipment are externally arranged, the installation is very complicated, and the environmental impact is serious, so that the accident rate is increased.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect and problem of prior art, the utility model provides a small, simple, safe, reliable high pressure outdoor vacuum switch.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an outdoor vacuum switch of high pressure with isolator, includes vacuum switch, one side of vacuum switch is equipped with the isolator rather than being connected, vacuum switch and isolator all fix in the insulator, isolator sets up in the isolator cavity of insulator, the isolator cavity is through sealed air respirator (33) that keeps having initial natural air or pass through absorption moisture and external intercommunication, isolator includes rotation type isolator moving contact (30), isolator moving contact (30) rotate around isolator insulating axle (32) of its central authorities, the both sides of isolator moving contact (30) are equipped with inlet wire side static contact (28) and outlet wire side static contact (35) respectively.
In the technical scheme, the incoming line side static contact (28) and the outgoing line side static contact (35) are respectively fixed on an insulator in a pre-buried mode, the isolating switch moving contact (30) is strip-shaped and coated with a moving contact insulating coating layer (31), an isolating contact pressing disc spring (29) is arranged at the end portion of the isolating switch moving contact (30), and a step surface for limiting the isolating switch moving contact (30) to rotate is arranged on the isolating switch cavity (34).
In the technical scheme, the outlet side static contact (35) is connected with the outlet side wiring terminal (1) through the outlet side conductor (2), and the outlet side conductor (2) is provided with the zero sequence current transformer (3), the outlet side current transformer (4) and the outlet side electronic voltage transformer (6).
In the technical scheme, the vacuum switch comprises a vacuum arc-extinguishing chamber (23) and a transmission mechanism.
Among the above-mentioned technical scheme, vacuum interrupter (23) inlet wire side is connected with inlet wire side binding post (19) through inlet wire side conductor (18), be provided with inlet wire side electronic voltage transformer (15), inlet wire side current transformer (17) and inlet wire side voltage transformer (22) on inlet wire side conductor (18).
Among the above-mentioned technical scheme, inlet wire side voltage transformer (22) are outer cone type, insert in the interior cone type cavity of left side insulator (24), the tip that inlet wire side voltage transformer (22) and inlet wire side conductor (18) are connected is provided with fast acting fuse (21).
In the technical scheme, an arc extinguish chamber movable conducting rod (25) is arranged on the outgoing side of the vacuum arc extinguish chamber (23), the arc extinguish chamber movable conducting rod (25) is connected with a movable end leading-out conductor (27), the movable end leading-out conductor (27) is in sliding contact with the arc extinguish chamber movable conducting rod (25) through a spring contact finger (13), and a fixed contact (28) on the incoming side is arranged at the end part of the movable end leading-out conductor (27).
Among the above-mentioned technical scheme, drive mechanism includes insulating pull rod (8), lever (7), connecting lever (10) and switch main shaft (11), insulating pull rod (8) set up in insulating pull rod cavity (12), insulating pull rod (8) one end is moved conducting rod (25) with the explosion chamber and is connected, and the other end rotates with lever (7) and is connected, lever (7) rotate with connecting lever (10) and are connected, connecting lever (10) other end rotates and sets up on switch main shaft (11), still be equipped with contact pressure spring (9) on connecting lever (10).
In the technical scheme, a front side plate (39) and a rear side plate (38) are respectively arranged on two sides of the insulator, the insulator is divided into a left insulator (24) and a right insulator (5), the vacuum arc-extinguishing chamber (23) is located in the left insulator (24), the transmission mechanism and the isolating switch are arranged in the right insulator (5), a silicon rubber insulating gasket (14) is fixed between the left insulator (24) and the right insulator (5), and a butt joint surface between the left insulator (24) and the right insulator (5) is in a tooth shape.
In the technical scheme, the high-voltage outdoor vacuum switch is in a three-phase arrangement, namely, three sets of vacuum switches and isolating switches are arranged in the insulator side by side.
The utility model provides a pair of high-pressure outdoor vacuum switch with isolator has reduced the volume by a wide margin, has reduced the cost, and is simple, safe, reliable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a sectional view taken along A-A of a side view of the high-voltage outdoor vacuum switch;
FIG. 2 is a side view of the high voltage outdoor vacuum switch;
FIG. 3 is a front view of the high voltage outdoor vacuum switch;
FIG. 4 is a top view of the high voltage outdoor vacuum switch (overhead conductor outlet mode);
fig. 5 is an axial view of the high-voltage outdoor vacuum switch (overhead wire outgoing mode).
In the figure: 1-the side of the outlet is connected with a terminal; 2-a lead-out side conductor; 3-a zero sequence current transformer; 4-current transformer at the outgoing line side; 5-right side insulator (phase a); 6-an outlet side electronic voltage transformer; 7-a lever; 8-an insulating pull rod; 9-contact pressure spring; 10-crank arm; 11-switching the main shaft; 12-an insulated pull rod cavity; 13-spring contact fingers; 14-silicone rubber insulating spacers; 15-an incoming line side electronic voltage transformer; 16-an upper cover plate; 17-incoming line side current transformer; 18-line-incoming side conductor; 19-incoming line side wiring terminal; 20-umbrella skirt at the wire inlet end; 21-a fast fuse; 22-an inlet wire side voltage transformer (an electromagnetic voltage transformer or a capacitor for getting electricity); 23-a vacuum arc-extinguishing chamber; 24-left insulator (phase a); 25-arc extinguish chamber moving conducting rod; 26-a lower cover plate; 27-leading out a conductor from the movable end of the arc extinguish chamber; 28-static contact at the wire inlet side; 29-the isolating contact compresses the disc spring; 30-moving contact of rotary isolating switch; 31-moving contact insulating coating layer; 32-isolator insulating shaft; 33-an air respirator; 34-a disconnector cavity; 35-fixed contact at the outgoing line side; 36-an outlet end umbrella skirt; 37-an operating mechanism; 38-rear side panel; 39-front side panel; 40-a manual energy storage handle; 41-switch operating handle; 42-isolating switch operating handle.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the high-voltage outdoor vacuum switch with the isolation switch as an embodiment includes a vacuum switch, the isolation switch connected to the vacuum switch is disposed on one side of the vacuum switch, the vacuum switch and the isolation switch are both fixed in an insulator, the isolation switch is disposed in an isolation switch cavity (34) of the insulator, the isolation switch cavity (34) is communicated with the outside through an air breather (33) which seals and retains initial natural air or absorbs moisture, the isolation switch includes a rotary isolation switch moving contact (30), the isolation switch moving contact (30) rotates around an isolation switch insulating shaft (32) in the center of the isolation switch moving contact, and an incoming line side static contact (28) and an outgoing line side static contact (35) are disposed on two sides of the isolation switch moving contact (30), respectively.
The isolating switch is characterized in that the incoming line side static contact (28) and the outgoing line side static contact (35) are respectively fixed in the insulator in an embedded mode, the isolating switch moving contact (30) is strip-shaped and coated with a moving contact insulating coating layer (31), an isolating contact pressing disc spring (29) is arranged at the end portion of the isolating switch moving contact (30), and a step surface for limiting the isolating switch moving contact (30) to rotate is arranged on the isolating switch cavity (34).
The outgoing line side static contact (35) is connected with an outgoing line side wiring terminal (1) through an outgoing line side conductor (2), and a zero sequence current transformer (3), an outgoing line side current transformer (4) and an outgoing line side electronic voltage transformer (6) are arranged on the outgoing line side conductor (2).
The vacuum switch comprises a vacuum arc extinguish chamber (23) and a transmission mechanism.
Vacuum interrupter (23) inlet wire side is connected with inlet wire side binding post (19) through inlet wire side conductor (18), be provided with inlet wire side electronic voltage transformer (15), inlet wire side current transformer (17) and inlet wire side voltage transformer (22) on inlet wire side conductor (18).
The voltage transformer (22) on the incoming line side is of an outer cone type and is inserted into an inner cone type cavity of the insulator, and a quick fuse (21) is arranged at the end part of the voltage transformer (22) on the incoming line side, which is connected with the conductor (18) on the incoming line side.
An arc extinguish chamber movable conducting rod (25) is arranged on the outgoing line side of the vacuum arc extinguish chamber (23), the arc extinguish chamber movable conducting rod (25) is connected with a movable end leading-out conductor (27), the movable end leading-out conductor (27) is in sliding contact with the arc extinguish chamber movable conducting rod (25) through a spring contact finger (13), and an incoming line side static contact (28) is arranged at the end part of the movable end leading-out conductor (27).
Drive mechanism includes insulating pull rod (8), lever (7), turning arm (10) and switch main shaft (11), insulating pull rod (8) set up in insulating pull rod cavity (12), insulating pull rod (8) one end is moved conducting rod (25) with the explosion chamber and is connected, and the other end rotates with lever (7) and is connected, lever (7) rotate with turning arm (10) and is connected, turning arm (10) other end rotates and sets up on switch main shaft (11), still be equipped with contact pressure spring (9) on turning arm (10).
The both sides of insulator are provided with preceding curb plate (39) and posterior lateral plate (38) respectively, the insulator divide into left side insulator (24) and right side insulator (5), vacuum interrupter (23) are located left side insulator (24), drive mechanism and isolator set up in right side insulator (5), be fixed with silicon rubber insulating gasket (14) between left side insulator (24) and right side insulator (5), the butt joint face between left side insulator (24) and right side insulator (5) is the profile of tooth.
The outdoor vacuum switch of high pressure is the three-phase setting, be provided with three sets of vacuum switch and isolator (A, B, C threephase) side by side in the insulator promptly.
The specific function analysis of each part in the embodiment according to the reference numeral is as follows:
(1) the outgoing side terminal 1-is connected with an external primary lead;
(2) the outgoing line side conductor 2-is used for internal conduction;
(3) the zero sequence current transformer 3-is used for measuring the zero sequence current;
(4) the outgoing line side current transformer 4-is used for measuring current;
(5) the right insulator (phase a) 5-plays a role of support and insulation. The whole insulator is divided into a left insulator (24) and a right insulator (5) by the limitation of the processing technology, and each side insulator is divided into A, B, C three phases again so as to be processed and manufactured;
(6) the electronic voltage transformer 6-on the outgoing line side is used for measuring voltage;
(7) lever 7-for transmission;
(8) insulating pull rod 8-for insulating transmission;
(9) a contact pressure spring 9 is used for ensuring enough contact pressure between a moving contact and a static contact of the vacuum arc-extinguishing chamber (23);
(10) crank arm 10-for transmission;
(11) the switch main shaft 11-drives the three-phase vacuum arc-extinguishing chamber (23) to act rapidly;
(12) the insulating pull rod cavity 12 is used for internally arranging an insulating pull rod (8);
(13) the spring contact finger 13-movable end lead-out conductor (27) is in sliding contact with the movable conducting rod (25) of the arc extinguish chamber;
(14) the silicon rubber insulating gasket 14-plays a role in sealing and insulating;
(15) the electronic voltage transformer 15-on the incoming line side is used for measuring the voltage on the incoming line side;
(16) upper cover plate 16-for sealing protection;
(17) the current transformer 17 at the incoming line side is used for measuring current;
(18) the lead-in side conductor 18-is used for conducting connection;
(19) the incoming line side terminal 19-is connected with an external primary lead;
(20) the wire inlet end umbrella skirt 20-is used for increasing creepage distance;
(21) a fast fuse 21 for protecting a voltage transformer (22);
(22) an incoming line side voltage transformer (adopting an electromagnetic voltage transformer or a power-taking capacitor) 22-measures voltage to provide operation power or float charge for a battery;
(23) vacuum arc-extinguishing chamber 23-for switching normal current or short circuit current;
(24) the left insulator 24-serves as support and insulation. The whole insulator is divided into a left insulator (24) and a right insulator (5) by the limitation of the processing technology, and each side insulator is divided into A, B, C three phases again so as to be processed and manufactured;
(25) the arc extinguish chamber moving conducting rod 25-is used for leading out;
(26) lower cover plate 26-for sealing protection;
(27) the arc extinguish chamber moving end leads out a conductor 27-the arc extinguish chamber moving conducting rod 25 leads out;
(28) the incoming line side isolation static contact 28-is connected with the movable contact 30 of the rotary isolating switch;
(29) the isolating contact compresses a disc spring 29, and enough pressure is kept between a moving contact (30) of the isolating switch and a static contact (28) at the incoming line side and a static contact (35) at the outgoing line side;
(30) the moving contact 30-of the rotary isolating switch has the functions of connection conduction and isolation;
(31) the insulating coating layer 31 of the moving contact strengthens the insulating function;
(32) the isolating switch insulating shaft 32-is used for transmission and insulation;
(33) air respirator 33 — to absorb moisture in the air;
(34) the isolating switch cavity 34 is used for placing an isolating switch;
(35) the outlet side isolation static contact 35-is connected with a movable contact (30) of the rotary isolating switch;
(36) the wire outlet end umbrella skirt 36-is used for increasing creepage distance;
(37) the operation mechanism 37-switch and isolating switch is used for operation and interlocking;
(38) rear side panel 38-protection from uv radiation to the insulator and protection;
(39) front side plate 39-ultraviolet ray protection insulator and protection;
(40) manual energy storage handle 40-for manual energy storage;
(41) switch operating handle 41-for operating the switch;
(42) disconnector operating handle 42-for operating the disconnector.
The invention will be further described with reference to the following figures 1 to 5 and examples:
1. the utility model provides an outdoor vacuum switch structure key point of high pressure with isolator:
firstly, a vacuum arc extinguish chamber (23), an incoming line side conductor (18) and a current transformer (17) of each phase are all pre-embedded in a left side insulator (24) to form a single-phase component, and the three components are combined to form a complete left side insulator;
secondly, an outgoing line side conductor (2), a current transformer (4) and the like are embedded in the right side insulator (5) to form a single-phase component, and the three components are combined to form a complete right side insulator;
and thirdly, the butt joint surface of the right insulator (5) and the left insulator (24) is in a tooth shape, and then a silicon rubber insulating gasket (14) is padded and fastened (see the attached figure 1). The contact surface is in a tooth shape, so that the creepage distance is effectively increased;
and fourthly, the voltage transformer (22) on the incoming line side is in an outer cone type and is inserted into an inner cone type cavity of the insulator (24) on the left side, and finally, the fastening and the sealing are carried out. The safety is high, and the occupied volume is very small;
the moving contact (30) of the rotary isolating switch is fixed on an isolating switch insulating shaft (32) and rotates along with the axis of the isolating switch insulating shaft, the moving contact insulating coating layer (31) is vulcanized and formed on the isolating switch insulating shaft (32) after the fixing is finished, and an umbrella skirt is designed to increase the creepage distance.
Sixthly, an incoming line side static contact (28) and an outgoing line side static contact (35) are respectively embedded in the right side insulator (5) and are in movable contact with a movable contact (30) of the rotary isolating switch.
The isolating switch is arranged in the isolating switch cavity (34) and is internally provided with common sealed air. Because the rotary isolating switch moving contact (30) rotates by 90 degrees by taking the center of an isolating switch insulating shaft (32) as an axis, when the rotary isolating switch moving contact (30) is at a brake separating position, as long as the clear distance (the shortest distance between the two and the thickness of a middle electric conductor is subtracted) between the isolating fixed contact (28) at the wire inlet side and the isolating fixed contact (35) at the wire outlet side reaches a safe distance, the safety can be ensured, and the occupied volume is very small;
the insulating pull rod (8) is arranged in the air cavity (12), so that the occupied volume is reduced.
2. The switching-on and switching-off processes of the vacuum switch are as follows:
fig. 1 shows the switch in the closed state. Under the drive of the operating mechanism (37), the switch main shaft (11) rapidly rotates anticlockwise, the connecting lever (10) is driven to rotate anticlockwise, the lever (7) is driven to rotate anticlockwise around a shaft, and finally the insulating pull rod (8) is driven to move rightwards, so that the moving contact and the static contact of the vacuum arc extinguish chamber (23) are separated by a certain distance, and the brake separating is completed. On the contrary, under the driving of the operating mechanism (37), the switch main shaft (11) rapidly rotates clockwise to drive the connecting lever (10) to rotate clockwise, and the lever (7) finally drives the insulating pull rod (8) to move leftwards until the vacuum is reached to the point that the movable contact and the static contact in the arc extinguish chamber (23) are contacted and keep a certain pressure, so that the switch-on is completed.
3. The closing and opening processes of the isolating switch are as follows:
fig. 1 shows the state of the disconnector after closing, and the two-dot chain line shows the state of the disconnector after opening. During opening, the isolating switch insulating shaft (32) rotates 90 degrees anticlockwise, two ends of the rotary isolating switch moving contact (30) are driven to be separated from the inlet wire side isolating static contact (28) and the outlet wire side isolating static contact (35) simultaneously, and an isolating fracture is formed between the two static contacts (28) and (35). When the switch is switched on, the rotating isolating switch is rotated by 90 degrees clockwise, two ends of a moving contact (30) of the rotating isolating switch are driven to be simultaneously connected with an isolating static contact (28) at the wire inlet side and an isolating static contact (35) at the wire outlet side respectively, so that a wiring terminal (19) at the wire inlet side, a conductor (18) at the wire inlet side, a vacuum arc-extinguishing chamber (23), the moving contact (30) of the rotating isolating switch, a conductor (2) at the wire outlet side and a wiring terminal (1) at the wire outlet side.
4. Interlocking relationship between vacuum switch and isolating switch:
the vacuum switch and the isolating switch have the following interlocking relationship in mechanical aspect: when in closing, the isolating switch is closed in place firstly, and then the vacuum switch is closed; when the vacuum switch is opened, the vacuum switch is opened in place and then is separated from the switch.
The utility model provides an outdoor vacuum switch technical scheme of high pressure outlines as follows: including left side insulators (divided into three phases); right side insulators (divided into three phases); an outgoing line; an insulated pull rod cavity; a current transformer; a voltage transformer and a fast fuse; electronic voltage transformer (also called voltage sensor), vacuum arc-extinguishing chamber; opening and closing the main shaft; a contact pressure spring; a crank arm; an isolator cavity; a moving contact of the rotary isolating switch; an isolation switch insulating shaft; a zero sequence current transformer; an insulating pull rod; spring fingers, etc.
The above-mentioned outdoor vacuum switch of high pressure still includes: an isolating switch cavity is designed in the insulator, a double-fracture rotary isolating switch moving contact and two fixed contacts are arranged in the isolating switch cavity, no insulating medium is filled in the cavity, and only natural air is reserved. The cavity of the isolating switch can adopt a strict sealing method to prevent moisture from entering, or a respirator is arranged, a desiccant (such as silica gel, calcium chloride or cobalt chloride and the like) is placed inside, and when external air enters, moisture can be absorbed, so that the invasion of water molecules is limited, and condensation is generated.
The utility model has the advantages that:
firstly, the vacuum arc-extinguishing chamber is pre-embedded in the solid insulator, so that the volume is greatly reduced and the manufacturing cost is reduced;
the isolating switch cavity only retains common air, and a double-break rotary isolating switch is arranged in the isolating switch cavity, so that the volume occupied by the isolating switch is greatly reduced;
and after the high-voltage outdoor vacuum switch is opened, the disconnecting switch is operated (electrically or manually), so that the voltage can be isolated, and the safety is ensured. When the switch is switched on, the isolating switch is firstly operated to switch on the isolating switch, and then the switching mechanism acts to switch on the arc extinguish chamber. An interlocking device is designed between the switch and the isolating switch, so that the device is simple, safe and reliable;
fourthly, the fast fuse is placed in an outer conical head of the voltage transformer, and the conical heads are respectively inserted into the inner conical holes, so that the safety of the voltage transformer is ensured, and the occupied space is reduced;
plug-in electronic voltage transformers are connected to the two sides of the incoming line and the outgoing line, so that the occupied space is reduced;
each phase of the incoming line or outgoing line side can be provided with a conical voltage transformer (or a large-capacity capacitor for power taking), each phase is provided with two secondary windings which are respectively used for phase voltage measurement and zero sequence voltage measurement and provide a high-power supply for an operating mechanism and a controller;
seventhly, each phase of the inlet wire side and the outlet wire side is provided with a current transformer, and one side of each phase is provided with a zero sequence current transformer;
installing an insulating pull rod in an air cavity with insulated periphery to reduce occupied space;
ninthly, the cavity of the isolating switch is mutually sealed with the outside, or the air respirator is communicated through the air which can be dried, and the moisture can not be invaded to cause condensation.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides an outdoor vacuum switch of high pressure with isolator, includes vacuum switch, its characterized in that, one side of vacuum switch is equipped with the isolator rather than being connected, vacuum switch and isolator all fix in the insulator, isolator sets up in the isolator cavity of insulator, the isolator cavity is through sealed air respirator (33) that keep initial natural air or through absorbing moisture and external intercommunication, isolator includes rotation type isolator moving contact (30), isolator moving contact (30) rotate around isolator insulating axle (32) of its central authorities, the both sides of isolator moving contact (30) are equipped with inlet wire side static contact (28) and outlet wire side static contact (35) respectively.
2. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 1, characterized in that: the isolating switch is characterized in that the incoming line side static contact (28) and the outgoing line side static contact (35) are respectively fixed in the insulator in an embedded mode, the isolating switch moving contact (30) is strip-shaped and coated with a moving contact insulating coating layer (31), an isolating contact pressing disc spring (29) is arranged at the end portion of the isolating switch moving contact (30), and a step surface for limiting the isolating switch moving contact (30) to rotate is arranged on the isolating switch cavity (34).
3. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 1, characterized in that: the outgoing line side static contact (35) is connected with an outgoing line side wiring terminal (1) through an outgoing line side conductor (2), and a zero sequence current transformer (3), an outgoing line side current transformer (4) and an outgoing line side electronic voltage transformer (6) are arranged on the outgoing line side conductor (2).
4. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 1, characterized in that: the vacuum switch comprises a vacuum arc extinguish chamber (23) and a transmission mechanism.
5. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 4, characterized in that: vacuum interrupter (23) inlet wire side is connected with inlet wire side binding post (19) through inlet wire side conductor (18), be provided with inlet wire side electronic voltage transformer (15), inlet wire side current transformer (17) and inlet wire side voltage transformer (22) on inlet wire side conductor (18).
6. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 5, characterized in that: the voltage transformer (22) on the incoming line side is of an outer cone type and is inserted into an inner cone type cavity of the insulator, and a quick fuse (21) is arranged at the end part of the voltage transformer (22) on the incoming line side, which is connected with the conductor (18) on the incoming line side.
7. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 4, characterized in that: the wire outlet side of the vacuum arc extinguish chamber (23) is provided with an arc extinguish chamber movable conducting rod (25), the arc extinguish chamber movable conducting rod (25) is connected with a movable end leading-out conductor (27), the movable end leading-out conductor (27) is in sliding contact with the arc extinguish chamber movable conducting rod (25) through a spring contact finger (13), and the end part of the movable end leading-out conductor (27) is provided with a wire inlet side static contact (28).
8. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 7, wherein: drive mechanism includes insulating pull rod (8), lever (7), turning arm (10) and switch main shaft (11), insulating pull rod (8) set up in insulating pull rod cavity (12), insulating pull rod (8) one end is moved conducting rod (25) with the explosion chamber and is connected, and the other end rotates with lever (7) and is connected, lever (7) rotate with turning arm (10) and is connected, turning arm (10) other end rotates and sets up on switch main shaft (11), still be equipped with contact pressure spring (9) on turning arm (10).
9. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 4, characterized in that: the both sides of insulator are provided with preceding curb plate (39) and posterior lateral plate (38) respectively, the insulator divide into left side insulator (24) and right side insulator (5), vacuum interrupter (23) are located left side insulator (24), drive mechanism and isolator set up in right side insulator (5), be fixed with silicon rubber insulating gasket (14) between left side insulator (24) and right side insulator (5), the butt joint face between left side insulator (24) and right side insulator (5) is the profile of tooth.
10. The high-voltage outdoor vacuum switch with the isolating switch as claimed in claim 1, characterized in that: the outdoor vacuum switch of high pressure is the three-phase setting, promptly be provided with three sets of vacuum switch and isolator side by side in the insulator.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020413544 | 2020-03-24 | ||
| CN2020204135441 | 2020-03-24 | ||
| CN2020102207295 | 2020-03-24 | ||
| CN202010220729 | 2020-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213212041U true CN213212041U (en) | 2021-05-14 |
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ID=75827990
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011259617.7A Pending CN113451071A (en) | 2020-03-24 | 2020-11-11 | High-voltage outdoor vacuum switch with isolating switch |
| CN202022614693.7U Active CN213212041U (en) | 2020-03-24 | 2020-11-11 | High-voltage outdoor vacuum switch with isolating switch |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011259617.7A Pending CN113451071A (en) | 2020-03-24 | 2020-11-11 | High-voltage outdoor vacuum switch with isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN113451071A (en) |
-
2020
- 2020-11-11 CN CN202011259617.7A patent/CN113451071A/en active Pending
- 2020-11-11 CN CN202022614693.7U patent/CN213212041U/en active Active
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| Publication number | Publication date |
|---|---|
| CN113451071A (en) | 2021-09-28 |
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