CN201820690U - High-voltage gas insulation load switch - Google Patents
High-voltage gas insulation load switch Download PDFInfo
- Publication number
- CN201820690U CN201820690U CN 201020515267 CN201020515267U CN201820690U CN 201820690 U CN201820690 U CN 201820690U CN 201020515267 CN201020515267 CN 201020515267 CN 201020515267 U CN201020515267 U CN 201020515267U CN 201820690 U CN201820690 U CN 201820690U
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- moving knife
- load switch
- knife bar
- bar
- rod
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Abstract
A high-voltage gas insulation load switch comprises fixed knife busbars, moving knife busbars, fixed knife heads, moving knife bar fixing seats, moving knife bars, grounding knife heads, grounding busbars, an insulating draw bar, a driving shaft and a crank arm. The fixed knife busbars and the moving knife busbars are mounted on an insulator, the fixed knife heads are connected with the fixed knife busbars, the moving knife bar fixing seats and the moving knife bars are connected with the moving knife busbars, the insulating draw bar, the driving shaft and the crank arm control rotation of the moving knife bars and drive the moving knife bars so as to realize three statuses including switching-on, switching-off and grounding of the load switch, a magnetic rotation arc coil is mounted above switching-off moving traces of each phase of the moving knife bars of the load switch, voltage-equalizing parts are mounted on two sides of each phase of the moving knife bars of the load switch, and each phase of the moving knife bars, the fixed knife heads and the magnetic rotation arc coils of the load switch is isolated by an isolating hood. The high-voltage gas insulation load switch adopts the voltage-equalizing parts to improve electric fields, magnetic rotation arc coil arc extinguishing and isolating hood isolation. Compared with the prior art, the high-voltage gas insulation load switch has the advantages of capabilities of reducing manufacturing cost and increasing insulation and voltage resistance of isolating fractures, strong arc extinguishing ability and high electrical durability.
Description
Technical field
The utility model relates to power switchgear manufacturing technology field, especially a kind of high voltage load switch of working in gas-insulated medium.
Background technology
The gas-insulated on-load switch need satisfy the multiple technologies requirement, and wherein a crucial performance assessment criteria is the arc extinguishing ability.Existing most gas-insulated on-load switches generally only satisfy the E2 level requirement in the on-load switch national standard (GB3804-2004), the i.e. electric life of 30 rated current 630A of disjunction under rated voltage.But at present increasing use occasion requires to exceed the standard of E2 level, need reach the E3 level, i.e. the electric life of 100 rated current 630A of disjunction under rated voltage.The arc-control device of existing gas-insulated on-load switch is difficult to satisfy the requirement of E3 level electric life, and the principal element that influences gas-insulated on-load switch electric life is the intensity size and and the usefulness of arc extinguishing of gas-insulated on-load switch electric arc when disjunction.
Existing gases at high pressure insulation load switch be contained in the air dielectric or the sulphur hexafluoride dielectric in, it has the moving knife bus-bar that is contained on the insulator, quiet cutter bus-bar, quiet cutter bus-bar is connected with quiet cutter head, the moving knife bus-bar is connected with supporting seat, this moving knife bar mostly is that the side by two front ends and width is that the body of rod of arc transition connects and composes, one end of moving knife bar is hinged on the axle of supporting seat, the other end is equipped with contact and the bolt sleeve that is connected these two bodies of rod and bolt and spring, at the middle part of two bodies of rod also by bearing pin and the actuating moving knife bar separating brake or the insulated tension pole of combined floodgate, some gases at high pressure insulation load switch also is equipped with at the other end with respect to quiet cutter head and is used for the quiet cutter head of ground connection that engages with the moving knife bar, the interrupter cartridge of these gases at high pressure insulation load switch is equipped with two kinds of arc extinguishing forms, a kind of is air-sweeping type, and another kind is the arc-chute chip.
The air-sweeping type arc-control device is that a pneumatic tube is housed near the moving knife bar, there are annexation in the piston of pneumatic tube and on-load switch main shaft, the nozzle of pneumatic tube is towards the branch fracture of moving knife bar and quiet cutter head, in on-load switch separating brake moment, piston moves rapidly in the pneumatic tube, cold sulfur hexafluoride gas in the pneumatic tube is blowed to the electric arc that produces between moving knife bar and the quiet cutter head from nozzle, electric arc is elongated and cooling, finally make arc extinction.Because adopted this interlock servicing unit, this gas-insulated on-load switch not only to require the separating brake merit of mechanism bigger than normal, and complex structure, reliability is low.
Arc-chute chip arc-control device is to be provided with a bracing frame in the certain relatively distance of moving knife rod end head movement locus and the position of angle, the multi-disc arc extinguishing grid pieces is installed in this bracing frame, these arc extinguishing grid pieces are parallel to each other or near parallel, arc extinguishing grid pieces generally adopts the plastic material of conduction to make.Electric arc produces between moving knife bar and arc extinguishing grid pieces and grid sheet in on-load switch separating brake process, the uniform electric field that utilizes parallel arc extinguishing grid pieces to form, electric arc is burnt between arc extinguishing grid pieces equably, thereby the ablation moving knife bar and the quiet cutter head of electric arc transition have been avoided, utilize the grid sheet to absorb the heat energy that electric arc produces simultaneously, electric arc is extinguished when current over-zero.The gas-insulated on-load switch of this structure requires height to the production of part and the assembly precision of product, and has the long shortcoming of electric life.
In addition, the metal derby bar cross section of the moving knife bar that majority of gas insulation load switch moving knife bar is used is a rectangle, electric field around the moving knife bar contact end is inhomogeneous, cause the puncture voltage between moving knife bar and the quiet cutter head to reduce, the isolation fracture dielectric voltage withstand that also causes the gas-insulated on-load switch to bear is lower, withstand voltage in order to guarantee enough fractures, existing gas-insulated on-load switch is just by providing the enough big moving knife bar and the distance of quiet cutter head to realize, therefore, physical dimension with the gases at high pressure insulation load switch of this structure just can not effectively be dwindled, not only material usage is big, the manufacturing cost height, and be not easy to be applied in the switchgear of miniaturization Design.
Summary of the invention
The purpose of this utility model provides a kind of gases at high pressure insulation load switch, and it is good inadequately that it mainly solves existing gases at high pressure insulation load switch arc extinction performance, the short and bulky problem of electric life.
In order to address the above problem, the technical solution adopted in the utility model is: this gases at high pressure insulation load switch, it has switch bracket, on switch bracket, three-phase moving knife bus-bar and quiet cutter bus-bar are housed by insulator, the quiet cutter bus-bar of described each phase is connected with quiet cutter head, the moving knife bus-bar of described each phase is connected with the supporting seat of hinged moving knife bar, described moving knife bar has the body of rod of two lath-shapeds, the end that these two bodies of rod are equipped with moving contact is equipped with connecting bolt, disjunction place at the described quiet cutter head of described each phase moving knife bar and homophase, lateral surface at this moving knife bar outer end movement locus is equipped with the magnetic rotation arc coil, this magnetic rotation arc coil includes the striking tongue of being made platy structure by electric conducting material, with the cylindrical skeleton that this striking tongue is connected, be contained in the outer coil of described cylindrical skeleton and be contained in the outer coil brace of making by electric conducting material of described coil and constitute; Described striking tongue is by described cylindrical skeleton, and coil is connected with the described quiet cutter bus-bar conduction of homophase with described coil brace; The lateral surface of the body of rod contact end of the described moving knife bar of each root is provided with outer surface and is the equal casting die of being made by electric conducting material of rounding off curved surface.
In the technique scheme, scheme can be more specifically: each mutually described quiet cutter head, and magnetic rotation arc coil and described moving knife bar and the described quiet cutter head of homophase divide the outside of fracture that the cage that the top is provided with air-vent is housed; The described moving knife bar of the central axis of each mutually described magnetic rotation arc coil and homophase in the moving knife bar of separating brake position towards angle be A, 15 °≤A≤35 °; The cylindrical skeleton of described magnetic rotation arc coil is a becket, and the internal diameter of this becket is D, 80 millimeters≤D≤92 millimeters; When described moving knife bar was in position with the described becket minimum range of homophase, the minimum range of it and the described cylindrical skeleton of homophase was B, and the distance of it and the described quiet cutter head of homophase is C, C＞B; The minimum range of described quiet cutter head and the described striking tongue of homophase is E, E 〉=5 millimeter; The body of rod of described each phase moving knife bar is the 6-10 millimeter with the minimum distance of homophase striking tongue in the separating brake motion process; The thickness of the body of rod of described each phase moving knife bar is F, and the thickness that is connected the described equal casting die on the body of rod is G, 1.9≤G/F≤2.1; The book wall spare that each mutually described equal casting die is a hollow, it is contained on the body of rod of described moving knife bar by described connecting bolt, be provided with alignment pin and location hole between the interconnective described body of rod and the described equal casting die, the undersized that this equal casting die leading section engages with described moving knife club shaft front end is in the size of this body of rod counterpart.
The gases at high pressure insulation load switch of employing technique scheme is compared with existing gas-insulated switch has following beneficial effect:
1, long service life: adopt the gas-insulated on-load switch of magnetic rotation arc arc-control device and at moving knife rod end head equal casting die is installed, can reach in rated voltage and rated current is under 630 amperes of conditions, the electric life that disjunction is 100 times.
2, improve the isolation fracture dielectric voltage withstand: equal casting die is installed in the both sides at each phase moving knife bar, can improve the Electric Field Distribution of moving knife masthead portion, evidence, under moving knife bar and the identical situation of quiet cutter head distance, the gas-insulated on-load switch that the gas-insulated on-load switch of equal casting die moving knife bar is installed and equal casting die moving knife bar is not installed is compared, and the withstand voltage limiting value of its fracture has improved 30%.
3, improve fail safe: outside the moving knife bar of each phase, quiet cutter head and magnetic rotation arc arc-control device, be provided with under the condition of cage, when the disjunction load current, cage can be isolated the electric arc that is produced between three-phase moving knife bar and the quiet cutter head, avoid alternate, the fault that is short-circuited over the ground, guarantee the fail safe of on-load switch.
4, low cost of manufacture: owing to adopt equal casting die and cage, can effectively reduce the physical dimension of on-load switch, can produce the miniaturization gases at high pressure insulation load switch that satisfies the dielectric voltage withstand requirement, thereby reduce manufacturing cost.
Description of drawings
Fig. 1 is the front view of the utility model embodiment;
Fig. 2 is the cutaway view at K-K place among Fig. 1;
Structural representation when Fig. 3 is in position with the described becket minimum range of homophase for the utility model embodiment moving knife bar;
Fig. 4 is the partial enlarged view at H place among Fig. 2.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawing example:
These gases at high pressure insulation load switch shown in Figure 1, there is one by two blocks of side plates be connected channel-section steel between these two blocks of side plates and support 1 that the body of rod constitutes, only show the device on the A circuitry phase wherein in the support 1, insulator 2 is equipped with by channel-section steel in the bottom of support 1, moving knife bus-bar 3 and supporting seat 4 are housed on the insulator 2, supporting seat 4 is equipped with the body of rod 10.3 of moving knife bar, the front end connecting bolt 10.2 of moving knife bar by bolt assembly; Insulator 6 is equipped with by plate body in the left side of support 1, and quiet cutter bus-bar 7 and quiet cutter head 5 are housed on the insulator 6; The quiet cutter head 11 of ground strap 13 and ground connection is housed on the channel-section steel of support 1 right part, driving shaft 12 is connected with connecting lever 14, connecting lever 14 by insulated tension pole 15 be connected bearing pin and be connected with the body of rod 10.3 of moving knife bar, rotating driveshaft 12, drive that the moving knife bars are connected with quiet cutter head 5 or be connected with the quiet cutter head 11 of ground connection or rest between quiet cutter head 5 and the quiet cutter head 11 of ground connection by connecting lever 14, insulated tension pole 15, realize on-load switch combined floodgate, ground connection, three kinds of states of separating brake, more than these parts same as the prior art.
In addition, described quiet cutter head 5 disjunctions place at each phase moving knife bar and homophase, lateral surface at this moving knife bar outer end movement locus is equipped with the magnetic rotation arc coil, the magnetic rotation arc coil includes coil brace 8.1, the striking tongue 8.2 of the platy structure of making by electric conducting material, the coil 8.4 of cylindrical skeleton of making as the copper material of coil core frame 8.3 and the turn-to-turn insulation on the cylindrical skeleton 8.3, coil brace 8.1 is contained on the quiet cutter bus-bar 7, striking tongue 8.2 is positioned at the outside of quiet cutter head 5, striking tongue 8.2 is by cylindrical skeleton 8.3, coil 8.4 is connected with quiet cutter bus-bar 7 conductions with coil brace 8.1, when moving knife rod end head during to striking tongue 8.2 and cylindrical skeleton 8.3 arcings, the arcing electric current is from cylindrical skeleton 8.3, coil 8.4, coil brace 8.1 forms current path to quiet cutter bus-bar 7, coil 8.4 produces one and drives arc magnetic field, magnetic field is perpendicular to electric arc, make electric arc high speed rotating under this action of a magnetic field, the high-speed motion of electric arc, be equivalent to the strong arc blow-out of air-flow, improve medium recovery strength effectively, improved the arc extinguishing ability; Electric arc is at cylindrical skeleton 8.3 inner surfaces of the magnetic rotation arc coil equal casting die 10.1 surperficial high-speed motions to the moving knife boom end outside, can effectively reduce the scaling loss of electric arc to moving knife bar and quiet cutter head 5, improve the electric life of on-load switch, simultaneously, the cylindrical skeleton 8.3 of magnetic rotation arc coil forms a second short circuit ring with respect to revolving arc coil, the effect of eddy current is wherein arranged, make driving magnetic field produce a lagging phase with respect to arc current, thereby there is stronger remnant field near zero point at electric arc, even electric current also can drive the electric arc high speed rotating in zero district, carry out the cooling of convection current effectively.
The cage 9 that the top is provided with air-vent is equipped with in the outside of 5 fens fractures of quiet cutter head of each mutually quiet cutter head 5 and magnetic rotation arc coil and moving knife bar and homophase, cage 9 the three-phase contact system over the ground, separately from, strengthen alternate, insulating reliability over the ground, and when short circuit current is closed in on-load switch disjunction rated load electric current or pass, cage 7 can be isolated the electric arc that is produced between three-phase moving knife bar and the quiet cutter head 5, avoid alternate, the fault that is short-circuited over the ground, guarantee the fail safe of on-load switch.
The inside diameter D of the cylindrical skeleton 8.3 of these gases at high pressure insulation load switch magnetic rotation arc coil is 92 millimeters (getting this value in another embodiment of the applicant is 80 millimeters), the position of moving knife bar shown in Figure 1 is on the separating brake position, at this moment, the described moving knife bar of the central axis of each phase magnetic rotation arc coil and homophase in the moving knife bar of separating brake position towards included angle A be 35 ° (getting this value among another embodiment the applicant is 15 °).
Shown in Figure 3, when the moving knife bar was in position with the described becket minimum range of homophase, the minimum range B of it and the described cylindrical skeleton 8.3 of homophase was less than the distance C of it and the quiet cutter head 5 of homophase; Quiet cutter head 5 is that E is 5 millimeters with the minimum range of homophase striking tongue 8.2, and the body of rod 10.3 of each phase moving knife bar is 6 millimeters with the minimum distance of homophase striking tongue 8.2 in the separating brake motion process in the separating brake motion process.
Fig. 2, shown in Figure 4, the B of these gases at high pressure insulation load switch, C has as shown in Figure 1 the structure mutually with A mutually, wherein the body of rod 10.3 of each phase moving knife bar has two, the lateral surface of the body of rod 10.3 contact end of the described moving knife bar of each root, it is the equal casting die 10.1 of sphere that the front end outer surface is housed, the end face of the body of rod 10.3 contacts one end is the face of cylinder, all casting die 10.1 is the book wall spares by the aluminum alloy materials die cast, the composition surface size that it docks with the body of rod 10.3 leading sections is slightly smaller than the size of the body of rod 10.3 front end counterparts, trip edge to the body of rod 10.3 that is equal casting die 10.1 front ends and the body of rod 10.3 is 0.5 millimeter in the outer peripheral distance of joint face, the thickness F of the body of rod 10.3 is 5 millimeters, all the thickness G of casting die 10.1 front ends is 10 millimeters, all the through hole of casting die 10.1 is contained on the connecting bolt 10.1, all the middle part of casting die 10.1 is provided with alignment pin portion, and this alignment pin portion inserts the body of rod 10.3 in the location hole that appropriate section is provided with.Adopt the gases at high pressure insulation load switch of this equal casting die, under the prerequisite of the identical fracture texture of same size, its withstand voltage limiting value can improve more than 30% than prior art, this structure and magnetic rotation arc coil and the combined result of cage, not only can make gases at high pressure insulation load switch volume-diminished, but also can reach in rated voltage and rated current is under 630 amperes of conditions, the electric life effect of disjunction more than 100 times.
Claims (4)
1. gases at high pressure insulation load switch, it has switch bracket (1), go up by insulator (2 at switch bracket (1), 6) three-phase moving knife bus-bar (3) and quiet cutter bus-bar (7) are housed, the quiet cutter bus-bar (7) of described each phase is connected with quiet cutter head (5), the moving knife bus-bar (3) of described each phase is connected with the supporting seat (4) of hinged moving knife bar, described moving knife bar has the body of rod (10.3) of two lath-shapeds, the end that these two bodies of rod (10.3) are equipped with moving contact is equipped with connecting bolt (10.2), it is characterized in that: in disjunction place of the described quiet cutter head (5) of described each phase moving knife bar and homophase, lateral surface at this moving knife bar outer end movement locus is equipped with the magnetic rotation arc coil, this magnetic rotation arc coil includes the striking tongue (8.2) of being made platy structure by electric conducting material, with the cylindrical skeleton (8.3) that this striking tongue (8.2) is connected, be contained in the outer coil (8.4) of described cylindrical skeleton (8.3) and be contained in outer coil brace (8.1) formation of making by electric conducting material of described coil (8.4); Described striking tongue (8.2) is by described cylindrical skeleton (8.3), and coil (8.4) is connected with described quiet cutter bus-bar (7) conduction of homophase with described coil brace (8.1); The lateral surface of the body of rod (10.3) contact end of the described moving knife bar of each root is provided with outer surface and is the equal casting die of being made by electric conducting material (10.1) of rounding off curved surface.
2. gases at high pressure insulation load switch according to claim 1, it is characterized in that: the cage (9) that each mutually described quiet cutter head (5), magnetic rotation arc coil and described moving knife bar and the described quiet cutter head of homophase divide the outside of fracture that the top is housed to be provided with air-vent.
3. gases at high pressure insulation load switch according to claim 1 and 2 is characterized in that: the described moving knife bar of the central axis of each mutually described magnetic rotation arc coil and homophase in the moving knife bar of separating brake position towards angle be A, 15 °≤A≤35 °; The cylindrical skeleton of described magnetic rotation arc coil (8.3) is a becket, and the internal diameter of this becket is D, 80 millimeters≤D≤92 millimeters; When described moving knife bar was in position with the described becket minimum range of homophase, the minimum range of it and the described cylindrical skeleton of homophase (8.3) was B, and the distance of it and the described quiet cutter head of homophase (5) is C, C＞B; The minimum range of described quiet cutter head (5) and the described striking tongue of homophase (8.2) is E, E 〉=5 millimeter; The body of rod (10.3) of described each phase moving knife bar is the 6-10 millimeter with the minimum distance of homophase striking tongue (8.2) in the separating brake motion process; The thickness of the body of rod (10.3) of described each phase moving knife bar is F, and the thickness that is connected the described equal casting die on the body of rod (10.3) is G, 1.9≤G/F≤2.1.
4. gases at high pressure insulation load switch according to claim 3, it is characterized in that: each mutually described equal casting die (10.1) is the book wall spare of hollow, it is contained on the body of rod (10.3) of described moving knife bar by described connecting bolt (10.2), be provided with alignment pin and location hole between the interconnective described body of rod (10.3) and the described equal casting die (10.1), the undersized that this equal casting die (10.1) leading section engages with described moving knife club shaft (10.3) front end is in the size of this body of rod (10.3) counterpart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020515267 CN201820690U (en) | 2010-09-03 | 2010-09-03 | High-voltage gas insulation load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020515267 CN201820690U (en) | 2010-09-03 | 2010-09-03 | High-voltage gas insulation load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201820690U true CN201820690U (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020515267 Expired - Lifetime CN201820690U (en) | 2010-09-03 | 2010-09-03 | High-voltage gas insulation load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201820690U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629530A (en) * | 2012-03-30 | 2012-08-08 | 厦门华电开关有限公司 | Arc-extinguishing load switch and switch equipment |
| CN106981390A (en) * | 2016-01-19 | 2017-07-25 | 欧玛嘉宝（珠海）开关设备有限公司 | A kind of gas-insulated arc-control device |
-
2010
- 2010-09-03 CN CN 201020515267 patent/CN201820690U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629530A (en) * | 2012-03-30 | 2012-08-08 | 厦门华电开关有限公司 | Arc-extinguishing load switch and switch equipment |
| CN106981390A (en) * | 2016-01-19 | 2017-07-25 | 欧玛嘉宝（珠海）开关设备有限公司 | A kind of gas-insulated arc-control device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110504 |
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| CX01 | Expiry of patent term |