CN203617555U - Switch cabinet and main circuit structure thereof - Google Patents
Switch cabinet and main circuit structure thereof Download PDFInfo
- Publication number
- CN203617555U CN203617555U CN201320769908.XU CN201320769908U CN203617555U CN 203617555 U CN203617555 U CN 203617555U CN 201320769908 U CN201320769908 U CN 201320769908U CN 203617555 U CN203617555 U CN 203617555U
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- China
- Prior art keywords
- control device
- arc control
- moving contact
- isolation
- contact
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000002955 isolation Methods 0.000 claims abstract description 144
- 230000033001 locomotion Effects 0.000 claims description 17
- 230000003068 static effect Effects 0.000 abstract description 9
- 238000005452 bending Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
The utility model discloses a switch cabinet and a main circuit structure thereof. The main circuit structure comprises an upper isolation static contact, a lower isolation static contact, and a circuit breaker in the middle part of a cabinet body; the circuit breaker comprises an arc extinguishing chamber; the top and bottom of the arc extinguishing chamber are respectively with the upper and lower isolation static contacts which are movably assembled along an up and down manner; the upper isolation static contact is provided with an upper connection station and a lower connection station which are arranged on an up-down moving stroke, and also includes a contact part which is used for communication between the connection stations and the upper isolation static contact; and the lower isolation static contact is provided with a lower connection station and an upper connection station which are arranged on an up-down moving stroke, and also includes a contact part which is used for communication between the connection stations and the lower isolation static contact. In the utility model, the main circuit structure of the switch cabinet along the vertical direction is approximate to the straight line shape, so as to solve the problem that the main circuit structure of a conventional withdrawable switch cabinet is too long due to the transverse bending.
Description
Technical field
The utility model relates to power transmission and distribution switch cubicle.
Background technology
Whether current switch cubicle both domestic and external can shift out and be divided into fixed and withdraw-type according to circuit breaker, and fixed cabinet exists the very problem of inconvenience of maintenance owing to being difficult to dismounting, withdraw-type cabinet of the prior art is as the disclosed a kind of switch cubicle of CN 203260933 U, the wallboard made from steel plate in its cabinet is separated and is formed multiple compartments, generally comprise the bus-bar room of top rear, the breaker chamber of front side, middle part, the cable vault of bottom rear side, handcart type breaker is housed in breaker chamber, handcart type breaker comprises along moving forward and backward the handcart on assembling guide rail in the horizontal direction and being fixed on the circuit breaker on handcart, the contact of breaker that circuit breaker comprises the arc control device of setting and conducts electricity respectively with the two poles of the earth of arc control device, before and after the contact of breaker that extends be arranged on arc control device and along up and down and column distribution, contact of breaker can move forward and backward with handcart, when handcart laggard in breaker chamber and move to while connecting station by forward direction from the opening of cabinet front panel, two contact of breaker can be respectively and bus-bar room, fixed contact on the wallboard of cable vault in set contact box is pegged graft and is coordinated conduction, and these two fixed contacts are to be respectively connected with main bus bar and a cable.Because the handcart of its circuit breaker is in cabinet front side, and need to move forward and backward along cabinet from the turnover of cabinet front panel, and bus-bar room and cable vault all arrange at cabinet rear side, therefore bus, cable and arc-extinguishing chamber of circuit breaker have the distance of fore-and-aft direction, thereby the major loop of such switch cubicle all needs to use the arc control device that just can be connected to circuit breaker after the bending of branch bar horizontal cross, and then horizontal outlet is to the cable vault of cabinet rear side, bending repeatedly backward more so forward, cause major loop long, waste a large amount of copper materials, cause switch cubicle cost to increase.
What on market, occurred in addition that a small amount of major loop near linear arranges removes cabinet or fixing cabinet, for the switch cubicle of the type, what adopt is the arm-type isolation moving contact of rotating knife, owing to being subject to the restriction of structure of contact terminal, what adopt this type of contact removes cabinet because problem of temperature rise cannot be accomplished larger rated current, can not realize seriation; And the fixing cabinet that adopts this type of contact does not possess the maintenance advantage easily of withdraw-type switch cabinet.
Utility model content
The purpose of this utility model is to provide a kind of switch cabinet main loop structure that can reduce major loop and laterally bend cabling.The switch cubicle with this major loop structure is provided simultaneously.
The technical scheme of switch cubicle of the present utility model is: a kind of switch cubicle, comprise the major loop structure arranging in cabinet and cabinet, major loop structure comprise in cabinet top for the upper isolation fixed contact of main bus bar conducting, in cabinet bottom for the lower isolation fixed contact of a cable conducting, in the circuit breaker at cabinet middle part, circuit breaker comprises arc control device, each arc control device have two electrodes, described arc control device arrange and have upper electrode and a lower electrode for erectting, arc control device top, on bottom, guiding movement is equipped with along the vertical direction, lower isolation moving contact, upper isolation moving contact, lower isolation moving contact respectively with the upper electrode of arc control device, lower electrode conducting, described upper isolation moving contact have move up and down the top connection station on stroke and isolation station on the lower and for connect station with on isolate fixed contact conducting contact portion, described lower isolation moving contact has the connection station on the lower that moves up and down on stroke and top isolation station and for connecting station and contact with lower isolation fixed contact the contact portion of conducting.
Station is being connected in arc control device over top in described upper isolation moving contact top, and upper isolation moving contact bottom is isolating station below arc control device top.
Station is being connected below arc control device bottom in described lower isolation moving contact bottom, and lower isolation moving contact top is isolating station above arc control device bottom.
Described arc control device top, bottom be fixed with respectively with the upper wire outlet seat of upper electrode conducting, with the lower wire outlet seat of lower electrode conducting, the upper and lower guiding movement of described upper isolation moving contact be assemblied in wire outlet seat and with upper wire outlet seat conductive contact, the upper and lower guiding movement of lower isolation moving contact be assemblied in lower wire outlet seat and with lower wire outlet seat conductive contact.
The fore-and-aft direction size of described cabinet is greater than the size of left and right directions, has three-phase arc control device and along fore-and-aft direction column distribution, the upper and lower isolation moving contact on each phase arc control device is distributed in the left and right sides of arc control device side by side on circuit breaker.
The technical scheme of the major loop structure of switch cubicle of the present utility model is: a kind of major loop structure of switch cubicle, comprise top for the upper isolation fixed contact of main bus bar conducting, bottom for the lower isolation fixed contact of a cable conducting, the circuit breaker at middle part, circuit breaker comprises arc control device, each arc control device have two electrodes, described arc control device arrange and have upper electrode and a lower electrode for erectting, arc control device top, on bottom, guiding movement is equipped with along the vertical direction, lower isolation moving contact, upper isolation moving contact, lower isolation moving contact respectively with the upper electrode of arc control device, lower electrode conducting, described upper isolation moving contact have move up and down the top connection station on stroke and isolation station on the lower and for connect station with on isolate fixed contact conducting contact portion, described lower isolation moving contact has the connection station on the lower that moves up and down on stroke and top isolation station and for connecting station and contact with lower isolation fixed contact the contact portion of conducting.
Station is being connected in arc control device over top in described upper isolation moving contact top, and upper isolation moving contact bottom is isolating station below arc control device top.
Station is being connected below arc control device bottom in described lower isolation moving contact bottom, and lower isolation moving contact top is isolating station above arc control device bottom.
Described arc control device top, bottom be fixed with respectively with the upper wire outlet seat of upper electrode conducting, with the lower wire outlet seat of lower electrode conducting, the upper and lower guiding movement of described upper isolation moving contact be assemblied in wire outlet seat and with upper wire outlet seat conductive contact, the upper and lower guiding movement of lower isolation moving contact be assemblied in lower wire outlet seat and with lower wire outlet seat conductive contact.
On described circuit breaker, there are three-phase arc control device and along fore-and-aft direction column distribution, the upper and lower isolation moving contact on each phase arc control device is distributed in the left and right sides of arc control device side by side.
The major loop structure of switch cubicle of the present utility model is near linear type vertically, thereby solve existing withdraw-type switch cabinet major loop structure because transverse fold causes long problem, reduce cost, reduced caloric value simultaneously, because isolation moving contact and isolation fixed contact adopt yo-yo fashion conducting, leave interval between the two and no longer need contact box around, make to isolate near cross-ventilation dynamic and static contact very unobstructed, the heat dissipation problem of insulating contact is resolved.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of switch cubicle of the present utility model;
Fig. 2 be in Fig. 1 in major loop two isolation moving contacts in connecting the structural representation of station;
Fig. 3 be in Fig. 1 in major loop two isolation moving contacts in isolation station structural representation;
Fig. 4 is the schematic perspective view of the embodiment of switch cubicle of the present utility model;
Fig. 5 is that the circuit breaker two in Fig. 1 is isolated moving contact in connecting the schematic perspective view of station;
Fig. 6 is that the circuit breaker two in Fig. 1 is isolated the schematic perspective view of moving contact in isolation station.
Embodiment
Shown in Fig. 1-Fig. 6, the embodiment of the switch cubicle of the circuit breaker of the above-mentioned circuit breaker embodiment of use of the present utility model, comprises cabinet 1, is provided with breaker chamber 2 and the bus-bar room 3 in breaker chamber upper and lower, cable vault 4 respectively in cabinet.In cabinet 1 horizontal direction, larger-size direction is fore-and-aft direction, and the direction that size is less is left and right directions.
Wherein in breaker chamber 2, circuit breaker is housed, circuit breaker moves along the fore-and-aft direction of cabinet on the track that is assemblied in breaker chamber 2 bottoms, three arc control device 23 erectting are set up in parallel along cabinet fore-and-aft direction, and the upper and lower wire outlet seat 22,25 on each arc control device 23 is distributed in the both sides of arc control device 23 at the fore-and-aft direction of cabinet.In breaker chamber, be also provided with and can be isolated up and down moving contact and move the valve 15,16 backing down.The front panel of cabinet 1 is provided with the observation window 14 of observing isolation moving contact state.
As shown in Figure 1-Figure 3, the embodiment of circuit breaker of the present utility model, it is a kind of handcart type breaker, comprise handcart 27, that erects is fixed on the arc control device 23 that three front and back on handcart 27 are set up in parallel, arc control device 23 have two electrodes up and down that cut-off under the driving of corresponding mechanism, and arc quenching chamber structure belongs to routine techniques and repeats no more.Each arc control device 23 tops and bottom are moved and are equipped with paired upper isolation moving contact 21, lower isolation moving contact 24 along straight-line guidance respectively, upper isolation moving contact 21, lower isolation moving contact 24 respectively with upper electrode, the lower electrode conducting of arc control device 23.
Upper and lower isolation moving contact drives and moves up and down in corresponding mechanism, and contacts with upper and lower wire outlet seat all the time in whole motion process.Drive dynamic/static contact in arc control device to cut-off (breaker arc extinguishing is indoor has the contact that can cut-off, and this belongs to prior art, and its structure repeats no more) and the straight moving operating mechanism moving of upper and lower isolation moving contact is arranged in mechanism case 26.Fig. 5, the isolation moving contact schematic diagram in the time of isolation and on-state respectively that Figure 6 shows that circuit breaker.Upper isolation moving contact 21 and lower isolation moving contact 24 have respectively operating mechanism separately to drive, and type of drive is longitudinal straight moving.Connect the approximate linear that is arranged to of rear conductor, as shown in Figure 2.
Upper wire outlet seat 22, arc control device part 23 and the equal sealing of lower wire outlet seat 25 are as a whole.The entirety of sealing and mechanism case 26 are fixed on handcart 27.Handcart 27 is different from existing chassis vehicle, and because longitudinal layout of conductor makes will pass handcart at the conductor of isolating up and down moving contact during in work, therefore handcart 27 is provided with the frame structure in the hole that the lower isolation moving contact 24 of confession passes through for bottom.
The three-phase main bus bar that is arranged in juxtaposition along cabinet fore-and-aft direction in bus-bar room and the upper isolation fixed contact 32 with each bus conducting are housed in bus-bar room 3, each main bus bar 31 is along left and right directions horizontal-extending, each main bus bar 31 is " two D type " bus, on main bus bar 1, have bolt hole, upper isolation fixed contact 32 the first half are square-section, clamped and adopt bolt to fix by two D type buses, upper isolation fixed contact 32 bottoms are downward opening tubular, the axis of pipe is vertical direction, and inside is provided with spring touch finger.Lower isolation fixed contact 41 with the inlet wire cable conducting of cable vault is housed in cable vault 4, lower isolation fixed contact 41 is arranged at the top of the line module 5 for connecting inlet wire cable, the lower end of lower isolation fixed contact 41 and line module 5 are fixed together and coaxially arrange with corresponding lower isolation moving contact 24, and upper and lower isolation fixed contact and line module are tubular.
Each phase major loop structure in this switch cubicle embodiment comprise for the upper isolation fixed contact 32 of main bus bar conducting, upper isolation moving contact 21, upper wire outlet seat 22, arc control device 23, lower wire outlet seat 25, lower isolation moving contact 24, for the lower isolation fixed contact 41 of a cable conducting, main bus bar 31 in above-described embodiment and line module 5 can be according to actual delivery electricity configurations, and the part that can be both switch cubicle product can be the field apparatus supporting with switch cubicle product.Three-phase major loop is arranged in juxtaposition along cabinet fore-and-aft direction (being the larger-size depth direction of cabinet) level, be arranged in juxtaposition compared with mode along cabinet left and right directions (being the Width that cabinet size is less) with common three-phase major loop, this scheme can reduce the width of cabinet.
The embodiment course of work of above-mentioned switch cubicle is as follows, the isolation moving contact of circuit breaker is in the time of on-state, upper isolation moving contact contacts with the spring touch finger in upper wire outlet seat 22 with upper isolation fixed contact 32 respectively at two ends Shang Xia 21, lower isolation moving contact contacts with the spring touch finger in lower wire outlet seat 25 with lower isolation fixed contact 41 respectively at two ends Shang Xia 24, and loop is in conducting state.The isolation moving contact of circuit breaker is by on-state during to isolation, and upper isolation moving contact 21 moves downward, and lower isolation moving contact 24 moves upward, and separates respectively with upper and lower isolation fixed contact 32,41, forms isolation fracture.When upper and lower isolation moving contact moves from on-position to isolated location, metal dampers 15,16 also moves to make position from open position, breaker chamber and upper and lower two charged compartments (bus-bar room, cable vault) are thoroughly separated, guaranteed maintenance safety.In the time of isolated location, upper and lower isolation moving contact still contacts with the spring touch finger in upper and lower wire outlet seat near one end of isolation fracture, away from isolation fracture one end unsettled and with arc control device 23 column distribution, thereby take the space of arc control device 23 both sides, take full advantage of clear position, thereby can reduce the size of cabinet.
The embodiment of the major loop structure of switch cubicle of the present utility model is identical with the major loop structure in above-mentioned switch cubicle embodiment, repeats no more herein.
In other embodiment of the present utility model, the main bus bar of switch cubicle can also adopt other shape bus, such as rectangle, grooved or circular busbar; Circuit breaker also can adopt fixed; All electric-conductors on major loop also can adopt other shape, particularly switch cubicle electric current hour, and upper and lower isolation moving contact adopts circle more suitable; Between upper and lower wire outlet seat and arc control device, also can not adopt the mode of bolt or cast to fix, such as welding; Upper and lower isolation moving contact also can not be connected by spring touch finger with upper and lower isolation fixed contact, such as connecting with bolt, and watchband-shaped contactor, the connected modes such as blade type contact; The insulation mode of same cabinet also can adopt gas-insulated; By circuit breaker with to isolate up and down the isolating switch that fixed contact forms jointly can be both two station disconnecting switchs, also upper and lower isolation method can be revised through simple, become three station isolation grounding switchs, to be suitable for multi-form switch cubicle, and circuit breaker also can, for being fixed on fixed in breaker chamber, now replace with holder by handcart the devices such as arc control device are fixed on holder.Use in addition the switch cubicle of circuit breaker not only can realize fixed but also can realize withdraw-type.Under normal circumstances, circuit breaker, without shifting out, can be realized the function such as connection, isolation of circuit by the action of circuit breaker and insulating contact; Without dismounting, circuit breaker can be shifted out by framework handcart when overhaul of line breaker or while safeguarding, make maintenance or safeguard convenient.
Claims (10)
1. a switch cubicle, comprise the major loop structure arranging in cabinet and cabinet, major loop structure comprise in cabinet top for the upper isolation fixed contact of main bus bar conducting, in cabinet bottom for the lower isolation fixed contact of a cable conducting, in the circuit breaker at cabinet middle part, circuit breaker comprises arc control device, each arc control device have two electrodes, it is characterized in that: described arc control device arrange and have upper electrode and a lower electrode for erectting, arc control device top, on bottom, guiding movement is equipped with along the vertical direction, lower isolation moving contact, upper isolation moving contact, lower isolation moving contact respectively with the upper electrode of arc control device, lower electrode conducting, described upper isolation moving contact have move up and down the top connection station on stroke and isolation station on the lower and for connect station with on isolate fixed contact conducting contact portion, described lower isolation moving contact has the connection station on the lower that moves up and down on stroke and top isolation station and for connecting station and contact with lower isolation fixed contact the contact portion of conducting.
2. switch cubicle according to claim 1, is characterized in that: station is being connected in arc control device over top in described upper isolation moving contact top, and upper isolation moving contact bottom is isolating station below arc control device top.
3. switch cubicle according to claim 1, is characterized in that: station is being connected below arc control device bottom in described lower isolation moving contact bottom, and lower isolation moving contact top is isolating station above arc control device bottom.
4. switch cubicle according to claim 1, it is characterized in that: described arc control device top, bottom be fixed with respectively with the upper wire outlet seat of upper electrode conducting, with the lower wire outlet seat of lower electrode conducting, the upper and lower guiding movement of described upper isolation moving contact be assemblied in wire outlet seat and with upper wire outlet seat conductive contact, the upper and lower guiding movement of lower isolation moving contact be assemblied in lower wire outlet seat and with lower wire outlet seat conductive contact.
5. according to the switch cubicle described in any one in claim 1-4, it is characterized in that: the fore-and-aft direction size of described cabinet is greater than the size of left and right directions, on circuit breaker, there are three-phase arc control device and along fore-and-aft direction column distribution, the upper and lower isolation moving contact on each phase arc control device is distributed in the left and right sides of arc control device side by side.
6. the major loop structure of a switch cubicle, comprise top for the upper isolation fixed contact of main bus bar conducting, bottom for the lower isolation fixed contact of a cable conducting, the circuit breaker at middle part, circuit breaker comprises arc control device, each arc control device have two electrodes, it is characterized in that: described arc control device arrange and have upper electrode and a lower electrode for erectting, on arc control device tops, bottom, guiding movement is equipped with upper and lower isolation moving contact along the vertical direction, upper isolation moving contact, lower isolation moving contact respectively with upper electrode, the lower electrode conducting of arc control device; Described upper isolation moving contact have move up and down the top connection station on stroke and isolation station on the lower and for connect station with on isolate fixed contact conducting contact portion, described lower isolation moving contact has the connection station on the lower that moves up and down on stroke and top isolation station and for connecting station and contact with lower isolation fixed contact the contact portion of conducting.
7. the major loop structure of switch cubicle according to claim 6, is characterized in that: station is being connected in arc control device over top in described upper isolation moving contact top, upper isolation moving contact bottom at isolation station below arc control device top.
8. the major loop structure of switch cubicle according to claim 6, is characterized in that: station is being connected below arc control device bottom in described lower isolation moving contact bottom, lower isolation moving contact top at isolation station above arc control device bottom.
9. the major loop structure of switch cubicle according to claim 6, it is characterized in that: described arc control device top, bottom be fixed with respectively with the upper wire outlet seat of upper electrode conducting, with the lower wire outlet seat of lower electrode conducting, the upper and lower guiding movement of described upper isolation moving contact be assemblied in wire outlet seat and with upper wire outlet seat conductive contact, the upper and lower guiding movement of lower isolation moving contact be assemblied in lower wire outlet seat and with lower wire outlet seat conductive contact.
10. according to the major loop structure of switch cubicle described in any one in claim 6-9, it is characterized in that: on described circuit breaker, have three-phase arc control device and along fore-and-aft direction column distribution, the upper and lower isolation moving contact on each phase arc control device is distributed in the left and right sides of arc control device side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769908.XU CN203617555U (en) | 2013-11-30 | 2013-11-30 | Switch cabinet and main circuit structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769908.XU CN203617555U (en) | 2013-11-30 | 2013-11-30 | Switch cabinet and main circuit structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617555U true CN203617555U (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320769908.XU Expired - Lifetime CN203617555U (en) | 2013-11-30 | 2013-11-30 | Switch cabinet and main circuit structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617555U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618215A (en) * | 2013-11-30 | 2014-03-05 | 国家电网公司 | Switch cabinet and major loop structure thereof |
| CN107134735A (en) * | 2017-04-05 | 2017-09-05 | 平高集团有限公司 | A kind of switch cubicle and switch cabinet handcart and transmission mechanism for valve |
| CN112614754A (en) * | 2020-12-10 | 2021-04-06 | 平高集团有限公司 | Handcart type direct current circuit breaker and connecting contact thereof |
| CN114362027A (en) * | 2021-12-16 | 2022-04-15 | 平高集团有限公司 | Aerify cabinet and gas tank thereof |
-
2013
- 2013-11-30 CN CN201320769908.XU patent/CN203617555U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618215A (en) * | 2013-11-30 | 2014-03-05 | 国家电网公司 | Switch cabinet and major loop structure thereof |
| CN107134735A (en) * | 2017-04-05 | 2017-09-05 | 平高集团有限公司 | A kind of switch cubicle and switch cabinet handcart and transmission mechanism for valve |
| CN107134735B (en) * | 2017-04-05 | 2019-01-22 | 平高集团有限公司 | A kind of switchgear and switch cabinet handcart and transmission mechanism for valve |
| CN112614754A (en) * | 2020-12-10 | 2021-04-06 | 平高集团有限公司 | Handcart type direct current circuit breaker and connecting contact thereof |
| CN112614754B (en) * | 2020-12-10 | 2023-04-07 | 平高集团有限公司 | Handcart type direct current circuit breaker and connecting contact thereof |
| CN114362027A (en) * | 2021-12-16 | 2022-04-15 | 平高集团有限公司 | Aerify cabinet and gas tank thereof |
| CN114362027B (en) * | 2021-12-16 | 2024-04-09 | 平高集团有限公司 | Inflatable cabinet and air box thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |
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| CX01 | Expiry of patent term |