CN106911086B - Nuclear-power reactor main pump switchgear - Google Patents
Nuclear-power reactor main pump switchgear Download PDFInfo
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- CN106911086B CN106911086B CN201710169503.5A CN201710169503A CN106911086B CN 106911086 B CN106911086 B CN 106911086B CN 201710169503 A CN201710169503 A CN 201710169503A CN 106911086 B CN106911086 B CN 106911086B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The present invention relates to a kind of nuclear-power reactor main pump switchgears, including at least first switch device, second switch device, the power input of first switch device is formed by frequency converter and power supply line and is connected, the power output end of first switch device and the power input of second switch device are formed and are connected, the power output end of second switch device is formed with main reactor pump for being electrically connected, first switch device, the main pump switchgear that second switch device is different safe power supply sequences；When inputting safe trip signal to first switch device, second switch device simultaneously, the switching device of at least one safe power supply sequence is disconnected, and is stopped as main reactor pump power supply；When to first switch device, second switch device input enabling signal, the switching device of two safe power supply sequences forms series connection and is powered for main reactor pump.The present invention has Redundancy Design, improves the reliability that main pump starts and stops.
Description
Technical field
The present invention relates to a kind of nuclear-power reactor main pump switchgears.
Background technique
In nuclear power plant, 1E grades of (safety level) reactor coolant pump switchgears are to execute the important of npp safety function to set
Standby, the bringing normally into operation in life expectancy meets the performance requirement of system and equipment, during the design basis event (earthquake) and it
There is the reliable ability for executing particular security functionality, so that it is guaranteed that the safe operation of power plant in stipulated time afterwards.
The construction and arrangement of the main pump breaker cabinet of nuclear power plant do not have essential distinction with regular tap cabinet at present, and only structure adds
By force, there is certain anti-seismic performance, arrange, be stitched together with other switchgear same columns, obtained from the main bus-bar of permutation switchgear
Power supply, is connected to main pump using cable outlet after breaker, and specified operation supply frequency is 50Hz.
Since the upstream of main pump breaker cabinet is main pump frequency conversion device, the frequency in main pump shutdown process will become
Change, therefore there are the possibility that short trouble occurs under 8Hz low frequency state for current supply circuit.However the similar product in current industry,
The verification test requirement that low frequency 8Hz and 60Hz connecting-disconnecting function is carried out to breaker was not proposed, therefore it can not be verified to cover
Lid main pump is by high-voltage frequency converter in the requirement of 8Hz and 60Hz height frequency range running protection.
Disadvantage one does not have Redundancy Design, cannot accomplish starting and stopping for high reliably control main pump.
Disadvantage two, no-voltage mutual inductor, cannot obtain main pump voltage signal, no under-voltage protection function, and no inverse probability is closed
Lock defencive function.
Disadvantage three, anti-seismic performance are inadequate, design the shockproof requirements envelope in a variety of factory sites inadequate.
Summary of the invention
Aiming at the problem that not having Redundancy Design in above-mentioned existing main pump switchgear, the present invention provides one kind and sets with redundancy
Meter promotes the nuclear-power reactor main pump switchgear that main pump starts and stops reliability.
Realize that technical scheme is as follows:
Nuclear-power reactor main pump switchgear, the switchgear include at least first switch device, second switch device, and first opens
The power input for closing device is formed by frequency converter and power supply line to be connected, the power output end of first switch device and second
The power input of switching device forms connection, and power output end and the main reactor pump of second switch device are formed for being electrically connected
It connects, first switch device, the main pump switchgear that second switch device is different safe power supply sequences；It is filled simultaneously to first switch
Set, when second switch device inputs safe trip signal, the switching device of at least one safe power supply sequence disconnects, stop be
Main reactor pump power supply；When to first switch device, second switch device input enabling signal, two safe power supply sequences
Switching device forms series connection and is powered for main reactor pump.
Further, the first switch device, second switch device respectively include switch cabinet, in respective switch cabinet
In be disposed with breaker, current transformer, voltage transformer, earthing switch, switch protection controller；Current transformer, voltage
Mutual inductor gives respective collected data information transfer to switch protection controller；
The output end of breaker, voltage transformer and frequency converter in the first switch device is formed by service cable
Electrical connection, the output end of breaker pass through after connect with current transformer cable in second switch device breaker,
Voltage transformer forms electrical connection, and the breaker output end in second switch device is electric by outlet after connecting with current transformer
Cable and main reactor pump, which are formed, to be connected；
Inlet wire cable vault, breaker chamber, voltage transformer room, outlet cable are isolated by partition inside switch cabinet
Room, secondary meter control room；Breaker is assemblied in breaker chamber, and voltage transformer is assemblied in voltage transformer room, switch
Protection controller is assemblied in secondary meter control room.
Further, the earthing switch includes that the pedestal being assemblied in switch cabinet, the three-phase being set on pedestal are exhausted
Edge is equipped with static contact above each insulator, and the operating shaft being rotatably dispose on pedestal, in the operating shaft
Be equipped with the one-to-one three-phase moving contact of static contact, at least there is on each static contact spaced apart two contact blocks；
Each moving contact at least has there are two contact patch, includes two in each contact patch and is formed with same contact block
The contact chip being engaged；
When moving contact and static contact are engaged, two contact chips in same contact patch form same contact block
Clamp state；
Contact pressure is generated to two contact chips at least provided with one between two contact chips in same contact patch
Two contact chips are made to clamp the elastic clamp device of same contact block.
The contact portion being engaged is formed with same contact block side at least provided with two on each contact chip, it is adjacent
Arranged for interval between contact portion.
The elastic clamp device, which is set to, forms corresponding position in two contact chips of state of clamping to same contact block
Contact portion between.
The elastic clamp device includes bolt, compressed spring, locking nut, and bolt is by two in same contact patch
Contact chip connection, forms the insertion space being inserted into for contact block between two contact chips, and compressed spring is assemblied in outside contact chip
Elastic top power is formed to contact chip on the bolt of side, the locking nut is assemblied on bolt to form compressed spring and limit；When
When contact block is in the insertion space between two contact chips, under the action of compressed spring, two contact chips are to contact block shape
At the state of clamping.Here earthing switch, compared to connecing for contact block in domestic similar switch product earthing switch and contact chip
Contacting surface product has more increase, has higher through-current capability.When contact block and contact chip cause to wear due to normal operating, with
And compressed spring due to fatigue effect cause elasticity reduce when, the adjusting lock nut on bolt in elastic clamp device can be passed through
To increase the decrement of compressed spring, guarantee also to ensure that between contact block and contact chip always with the contact pressure of defined
Earthing switch is able to bear specified KA Rms, Rated peak withstand current, rated short circuit making current, while also prolonging
The service life of earthing switch is grown.
Further, the arc-proof structure that electric arc blocking is carried out at end of door plate is provided on the switch cabinet, this is anti-electric
Arc structure includes the buffering plate for being fixed at door-plate inner surface,
The edge for buffering plate is bonded with the formation of door-plate inner surface, in the inner surface and door-plate of buffering plate
Buffer chamber is formed between side surface；
It is provided at the edge of door-plate inner surface and forms the edge dam being bonded, edge dam and switch with switch cabinet
Cabinet body is bonded to form sealing；
The water conservancy diversion for extend but do not contact towards door-plate inner surface door-plate inner surface is provided on switch cabinet
Plate, deflector, buffering plate, door-plate inner surface between form mazy buffer channel.
The door-plate inner surface is fixedly installed the barrier structure that barrier is formed to buffer channel end, the barrier structure
Including the interior fagging being fixedly installed on door-plate, and the sealing element being assemblied on interior fagging, the sealing element and the switchgear bodily form
It is sealed at contact.Buffer air chamber structure, door-plate and switch device cabinet bodies gap are added using double-layer plate in the door-plate of switch cabinet
Place uses labyrinth type buffer channel structure.When the arc accident that breaks down inside switchgear, the pressure high temperature hot gas of generation
In frontal impact to buffering plate and it is allowed to be deformed and possibly even melts, and the buffer chamber between door-plate and buffering plate
Certain buffer function played to impact, the indoor air of simultaneous buffering chamber also plays pressure high temperature hot gas certain cold
But it acts on, so that door-plate not will receive the destruction of high-temperature gas substantially.And enter door with it is a small amount of at switch device cabinet bodies gap
Pressure high temperature hot gas is guided in mazy buffer channel, i.e., just can enter in buffer channel after 90 degree of turnings, and
Blocking is formed by edge dam, can not be directly injected to outside cabinet body or in adjacent chamber, it can only be from the pressure release of switchgear
Mouthful discharge, will not be to causing to damage outside switch cabinet since pressure and temperature is greatly diminished even if there is a small amount of gas to spray
Evil, while playing the role of good safeguard protection to equipment operations staff, it can be effectively reduced high pressure-temperature fault electric arc gas
The destruction of body switching devices door-plate prevents the pressure high temperature hot gas generated in switch cabinet and glow particles and expands to device housings
It dissipates, anti-Internal faults arc ability is up to 50kA, 1s (IAC grades of internal arc grade, AFLR).
Further, the breaker chamber, transformer indoor are respectively arranged with handcart, on the side plate of switch cabinet
It is equipped with left rail, right guide rail, handcart moves on left rail, right guide rail, is fixedly connected with support frame in the switch cabinet
Frame, the braced frame are in left rail, right guide rail lower section and are fixedly connected with two guide rails, be fixedly installed on the support frame
Two locating pieces offer location hole on locating piece, and there are two positioning pins for the front end fixed setting of the handcart, and positioning pin is one by one
Limit is formed in corresponding insertion location hole；The location hole includes the round hole section that taper hole section is connected to conical section, positioning
The outer diameter of pin and the internal diameter of round hole section are adapted, and the front end of the positioning pin is tapered end.
The braced frame includes upper backup pad, lower supporting plate, and two between upper backup pad, lower supporting plate
The upper end of side support plate, side support plate is fixedly connected with upper backup pad, and lower end is fixedly connected with lower supporting plate, the upper support
Plate, lower supporting plate and two side support plates enclose rectangular support；Upper backup pad is fixedly connected with left rail, right guide rail, under
Support plate is fixedly connected with switch cabinet, and side support plate is fixedly connected with the side plate of switch cabinet；
The side support plate includes the upper supporting plate being fixedly connected with upper backup pad, the lower branch being fixedly connected with lower supporting plate
Plate is fixedly connected between upper supporting plate and lower carrier plate；
The upper supporting plate is bent by downward 90 ° of upper backup pad, and lower carrier plate is bent by upward 90 ° of lower supporting plate；
The left rail, right guide rail respectively include being horizontally fixed on the lower fagging on switch cabinet side plate and are fixed on
Top board on lower fagging is formed between lower fagging upper surface and lower fagging lower surface and is moved for handcart ontology upper roller
Guide channel；Outward bending forms a fixed connection portion in the middle part of the top board or/and lower fagging, this is fixedly connected with portion and switch
Side cabinet is fixedly connected.Braced frame is set in switch device cabinet bodies, and the braced frame is to left rail, the fixed company of right guide rail
It connects and forms support, and braced frame forms a fixed connection with switchgear, thus guide rail, braced frame and switch device cabinet bodies
Form firm integrated connection；In switchgear working condition, positioning pin is in location hole；When earthquake accident occurs,
The active force generated by earthquake acted on handcart ontology can be transferred to guide rail and fixed by idler wheel on handcart and positioning pin
Position block, and then it is transferred to braced frame, it finally is transferred to switchgear installation foundation by switch device cabinet bodies, and then pass through the earth
Balance out, ensure that the stability of handcart, guarantee medium voltage switchgear equipment have bear KA Rms, peak value tolerance electric current,
The ability of short circuit current is cut-off, while guaranteeing that medium voltage switchgear equipment is 5.1788g, vertically to acceleration is in horizontal direction acceleration
It still is able to safely and reliably run under the geological process of 7.0818g, and has the above respective capabilities, fully meet three generations nuclear power plant
To the technical requirements of medium voltage switchgear equipment.
Reactor coolant pump (main pump) switchgear of the present invention provides 6 (6.9) kV, 50 (60) to main pump under normal circumstances
Hz power supply guarantees the normal operation of main pump.Every main pump is respectively by middle pressure bus opening through two different safe power supply sequences
Device series winding power supply is closed, and controls its operation, for meeting main pump safety level separating brake functional requirement, this is a kind of Redundancy Design,
To ensure to receive, main pump can be out of service after safety level trip signal.Excellent feature of the invention:
One, two series connection, Redundancy Design guarantee separating brake reliability, it is ensured that main pump reliable shutdown.
Two, voltage transformer is mounted with inside each switching device, can directly obtain voltage signal, meet low-voltage
Defencive function and inverse probability latch-up protection functional requirement.
Three, structural seismic performance is strong, the design envelope floor response spectrum in a variety of factory sites of shock test spectrum (including flexibility
Spectrum) so that the product applicability is wider.
Excellent feature four, operation supply frequency range are wide, meet the requirement of 8Hz -60Hz.It is short by related low frequency and high frequency
Road breaking test, test result show that breaker can cut-off 9kA short circuit current under the low frequency state of 8Hz, in 60Hz high frequency shape
The level that 9kA short circuit current can be cut-off under state, can satisfy actual condition demand, cover AP1000, CAP1000 and
Control and protection zone of the CAP1400 main pump when low frequency or high band are run.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of nuclear reactor main pump switchgear single line of the present invention；
Fig. 2 is two switching device internal structures and the connection schematic diagram of two switching devices in the present invention；
Fig. 3 is the schematic diagram of internal structure of first switch device in the present invention；
Fig. 4 is the schematic diagram of internal structure of second switch device in the present invention；
Fig. 5 is the structural schematic diagram of earthing switch in the present invention；
Fig. 6 is the left view structural representation of Fig. 5；
Fig. 7 is the structural schematic diagram of arc-proof structure in the present invention；
Fig. 8 is the handcart structural schematic diagram used in the present invention；
Fig. 9 is the assembly schematic perspective view of braced frame and left and right guide rail in the present invention；
Figure 10 is the rear view three-dimensional structure of Fig. 9；
Figure 11 is positioning pin and the schematic perspective view after locating piece fractionation in the present invention；
In attached drawing: 1 is first switch device, and 2 be second switch device, and 3 be frequency converter, and 4 be power supply line, and 5 be reaction
Heap main pump, 6 be switch cabinet, and 7 be breaker, and 8 be current transformer, and 9 be voltage transformer, and 10 be earthing switch, and 11 be confession
Electrical cables, 12 be a cable, and 13 be outlet cable, and 14 be inlet wire cable vault, and 15 be breaker chamber, and 16 be voltage transformer
Room, 17 be outlet cable room, and 18 be secondary meter control room, and 19 be cable channel isolation, and 20 be one-time contact, and 21 be contact
Box, 22 for can withdraw-type voltage mutual inducer trolley, 23 for can withdraw-type circuit breaker cart, 24 be conducting copper, and 25 be insulation branch
Support member, 26 be pedestal, and 27 be insulator, and 28 be static contact, and 29 be operating shaft, and 30 be moving contact, and 31 be contact block, and 32 be contact
Piece, 33 be contact portion, and 34 be notch, and 341 be elastic clamp device, and 35 be bolt, and 36 be compressed spring, and 37 be insertion space,
38 be locking nut, and 39 be outer ring compressed spring, and 40 be inner ring compressed spring, and 41 be door-plate, and 42 be buffering plate, and 43 be buffering
Chamber, 44 be bending part, and 45 be switch device cabinet bodies frame, and 46 be edge dam, and 47 be deflector, and 48 be buffer channel, and 49 are
Interior fagging, 50 be sealing element, and 51 be left rail, and 52 be right guide rail, and 53 be handcart ontology, and 54 be idler wheel, and 55 be braced frame, 56
It is location hole for locating piece, 57,58 be positioning pin, and 59 be locking nut, and 60 be taper hole section, and 61 be round hole section, and 62 be upper
Support plate, 63 be lower supporting plate, and 64 be upper supporting plate, and 65 be lower carrier plate, and 66 be bottom support frame, and 67 be lower fagging, and 68 be upper pressure
Plate, 69 be guide channel, and 70 is are fixedly connected with portion, and 71 is plug portion, and 72 is plug notch, and 73 be bearing stepped plate.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, shall fall within the protection scope of the present invention.
As shown in Fig. 1-4, nuclear-power reactor main pump switchgear, the switchgear includes first switch device 1, second switch
Device 2, the power input of first switch device is formed by frequency converter 3 and power supply line 4 to be connected, the electricity of first switch device
The power input of source output terminal and second switch device, which is formed, to be connected, the power output end of second switch device and reactor master
Pump 5 is formed for electrical connection, first switch device, the master that second switch device is different safe power supply sequences (C sequence, B sequence)
Switch pump cabinet；When inputting safe trip signal to first switch device, second switch device simultaneously, at least one is supplied safely
The switching device of electric array disconnects, and stops as main reactor pump power supply；It is opened when to first switch device, the input of second switch device
When dynamic signal, the switching device of two safe power supply sequences forms series connection and is powered for main reactor pump.Two main pump switches
Device can be set upstairs with a tablecloth, and a tablecloth is set downstairs.I.e. first switch device is in downstairs, and second switch device is in
Upstairs.
First switch device 1, second switch device 2 respectively include switch cabinet 6, are disposed in respective switch cabinet disconnected
Road device 7, current transformer 8, voltage transformer 9, earthing switch 10, switch protection controller；Current transformer, voltage transformer
Give respective collected data information transfer to switch protection controller；The internal structure of two switching devices is essentially identical.
Wherein, the output end of the breaker in first switch device, voltage transformer and frequency converter passes through service cable 11
Electrical connection is formed, the output end of breaker passes through disconnected in a cable 12 and second switch device after connecting with current transformer
Road device, voltage transformer form electrical connection, and the breaker output end in second switch device passes through after connecting with current transformer
Outlet cable 13 and main reactor pump, which are formed, to be connected；Inlet wire cable vault 14, open circuit are isolated by partition inside switch cabinet
Device room 15, voltage transformer room 16, outlet cable room 17, secondary meter control room 18；Breaker is assemblied in breaker chamber, electricity
Pressure mutual inductor is assemblied in voltage transformer room, and switch protection controller is assemblied in secondary meter control room.Secondary control instrument
Table controls indoor location electrical equipment control circuit component, comprehensive protector, control loop connecting terminal and its connecting wire etc..
Transformer indoor install one-time contact 20, contact box 21, can withdraw-type voltage mutual inducer trolley 22, in voltage
The components such as voltage transformer 9, fuse are installed on mutual inductor handcart.Breaker indoor location one-time contact 20, contact box
It 21, can withdraw-type circuit breaker cart 23 etc..Inlet wire cable vault is installed by cable, conducting copper 24 and its insulated support 25
Deng.Current transformer 8, earthing switch 10, cables, conducting copper and its an insulated supports etc. are installed in outlet cable room, together
When the intracorporal outlet cable room of second switch device switchgear in be provided with and be isolated with its internal outlet cable room, for primary
The cable channel isolation 19 of cable routing, avoids the interference generated between inlet wire and outlet；The upper end of the cable channel isolation with
The inlet wire cable vault of second switch device switch cabinet is connected to, and lower end is passed through with second switch device switch cabinet bottom；Specifically
In implementation, cable channel isolation can be formed using two metal plate arranged for interval, be formed after the edge flange of two metal plates
Connection is posted and fixed, forms closed cable channel isolation 19 between metal plate in this way, naturally it is also possible to use metal tube
To realize.
Arrange that interior is isolated into 1E grades of control loop compartments and non-1E grades of control by metal partion (metp) in secondary meter control room
Circuit compartment processed, metal partion (metp) are arranged in secondary meter control room by a metal plate is horizontal or vertical；Or two pieces, two pieces with
On metal partion (metp) superposition after horizontal or vertical be arranged in secondary meter control room；It is formed between adjacent metal partition empty
Chamber, with to generating buffer function when impacting.By 1E grades and non-1E grades of circuit isolation design, i.e., non-1E grades of power cable with
The isolation that the inlet-outlet line of 1E grades of control cables is set meets the requirement that criterion is isolated in IEEE 384 to greatest extent.
In specific implementation, in order to keep switchgear operation supply frequency range wide, meet the requirement of 8Hz -60Hz, electric current is mutual
Sensor uses three-phase simplex winding, and secondary output: 5A, class of accuracy 5P20, capacity: 50VA, secondary current circuit pass through current testing
Plug-in unit is connected to comprehensive protector, for acquiring the electric current in route；Voltage transformer uses three-phase simplex winding, secondary output:
100V, 0.5 grade of class of accuracy, capacity: 50VA, secondary voltage circuit are connected to comprehensive protector by voltage test plug-in unit, are used for
Acquire the voltage in route；In order to realize reliable separating brake, two sets of models of configuration are different in two switching device series connection major loops
Comprehensive protector, model are respectively SEL-751A and SEL-710, and the comprehensive protector is mutual by current transformer and voltage
Sensor monitors line current and line voltage distribution, has the defencive functions such as overcurrent, quick-break, overvoltage, low-voltage, protection act effect
In breaker open operation.
Reverse-power protection be by real-time collection voltages of voltage transformer and current transformer in main pump breaker cabinet and
Current signal judges power direction, inverse probability such as occurs, the reverse-power protection actuating of relay in cabinet, issues trip signal, makes
The tripping of this cabinet breaker, prevents main pump from switching to generator to distribution bus transmission power from motor.Specifically in two kinds of situation:
1, when main pump operates normally, reverse-power protection function is worked normally, prevent from causing due to various reasons main pump by
Motor becomes generator, and to distribution bus transmission power.
2, in main pump start-up course, reverse-power protection function function is latched by comprehensive protector.Since 4 main pumps are
It is respectively started one by one, there is that the regular hour is poor (generally dozens of minutes to a few hours), in the meantime, the pipe being connect with main pump
Fluid in road will generate turbulent flow, may cause the passive rotation of inactive main pump, be equivalent to main pump motor and become power generation
Machine, and to distribution bus output power, emergent power flows backwards phenomenon, at this point, to start 4 main pumps normally one by one, Bu Nengrang
Cabinet inner breaker tripping, it is necessary to be latched reverse-power protection function.
As shown in Figure 5,6, earthing switch 10 includes the pedestal 26 being assemblied in switch cabinet, and pedestal here can be open
The bottom plate for closing cabinet body is also possible to the increase on bottom plate, three phase isolated 27 being set on pedestal, in each insulator
Top is equipped with static contact 28, and the operating shaft 29 being rotatably dispose on pedestal, is equipped with static contact one by one in operating shaft
Corresponding three-phase moving contact 30, rotating clockwise or rotating counterclockwise by manipulation operations axis, may be implemented moving contact with it is quiet
The contact or separation of contact.Static contact is electrically connected by conducting copper with the route formation in switching device.
There is spaced apart two contact blocks 31 in the lower section of each static contact, two contact blocks are mutually indepedent, mutually not
Interference；Contact block is whole shaped like strip, and the contact surface contacted with moving contact is formed in the two sides of contact block.Static contact with contact
Block is integrated molding of producing once.
Each moving contact tool there are two contact patch, in each contact patch includes two and is formed and contact with same contact block
The contact chip 32 of cooperation；When moving contact and static contact are engaged, two contact chips in same contact patch connect to same
State is clamped in contact block formation.Two are formed above each contact chip forms the contact portion being engaged with same contact block side
33, arranged for interval between adjacent contact.Contact portion is upwardly extended by contact chip, when production, i.e., is opened on contact chip top
Notch 34 out can form two contact portions at an upper portion thereof.
In specific implementation, one or two or three or four is provided between two contact chips in same contact patch
The elastic clamp device that contact pressure makes two contact chips clamp same contact block is generated to two contact chips.The present embodiment it is attached
In figure, elastic clamp device is set to the contact portion that corresponding position in two contact chips of state of clamping is formed to same contact block
Between.If contact chip is monoblock type, i.e., when not opening up notch 34, elastic clamp device can be arranged directly on same contact patch
In two contact chips on.The setting of specific elastic clamp device and quantity can according to the grounding requirement of different switchgears come
It is configured.
In implementation, elastic clamp device 341 includes bolt 35, compressed spring 36, and bolt is by two in same contact patch
A contact chip connection, forms the insertion space 37 being inserted into for contact block between two contact chips, can be in same contact patch
In two contact chips between bolt on put on casing, to guarantee the opening degree of insertion space, so as to contact BOB(beginning of block) into
Enter smoothness when insertion space；Compressed spring, which is assemblied on the bolt on the outside of contact chip, forms elastic top power to contact chip；When
When contact block is in the insertion space between two contact chips, under the action of compressed spring, two contact chips are to contact block shape
At the state of clamping.When contact block and contact chip cause to wear and compressed spring is since fatigue effect is made due to normal operating
When reducing at elasticity, the decrement of compressed spring can be increased by adjusting the locking nut 38 on bolt, guarantee contact block with
Always with the contact pressure of defined between contact chip.
Earthing switch shown in the present embodiment is using eight spring structure of double-pole, i.e. earthing switch A, B, C three-phase is each mutually quiet
Contact designs after increasing overall dimensions 2 contact blocks, and moving contact design has 2 groups of totally 4 contact chips, every 1 group of contact chip
Corresponding 1 contact block, every 1 group of contact chip tightly clamp contact block using 4 bolts, 4 compressed springs and 4 locking nuts,
Guarantee contact pressure between the two.The earthing switch of this spline structure is able to bear specified KA Rms, rated peak tolerance
Electric current, rated short circuit making current fully meet nuclear power plant to the technical requirements of medium voltage switchgear equipment earthing switch.
In addition, the dynamic static joint driving spring in earthing switch uses two-man act structure, the i.e. every phase moving contact driving of earthing switch
Spring use 1 outer ring compressed spring 39 and 1 inner ring compressed spring 40, inner ring compressed spring be in outer ring compressed spring it
In, one end of spring is formed by spring base and pedestal to be connected, and the other end is connected to by spring base follows operating shaft rotation
On rotating block；Driving force is thus increased, ensure that earthing switch can rapidly carry out splitting or integrating lock, also ensure simultaneously
The dynamic and static contact of earthing switch contacts reliably in high peak point current, and withdrawing phenomenon will not occur.
As shown in fig. 7, being provided with the arc-proof structure for carrying out electric arc blocking at end of door plate 41 on switch cabinet comprising door
The buffering plate 42 of the inner surface fixed setting of plate 41, buffering plate is steel plate, is buffered in the edge and door-plate of plate
Side surface forms fitting, and buffer chamber 43 is formed between the inner surface and door-plate inner surface of buffering plate；Buffer plate
Edge form bending part 44, formed and be bonded in the middle part of the inner surface of bending part and door-plate, specific bending part end and door
Plate is formed by welding manner and is connected；Buffer chamber just is formed between buffering plate and door-plate in this way.
It is provided at the edge of door-plate inner surface and forms the edge dam 46 being bonded, edge with switch device cabinet bodies frame 45
Baffle is bonded to form sealing with switch device cabinet bodies；In specific implementation, edge dam 46 is that the bending of door-plate edge extends, side
The right end of portion's baffle is contacted and is sealed with the formation of switch device cabinet bodies frame is set.
It is provided on switch device cabinet bodies frame and extend towards door-plate inner surface but do not contact door-plate inner surface
Deflector 47, one end of deflector is assemblied on switch device cabinet bodies frame by bolt, the other end be bending end and the end with
Deflector lower surface or upper surface form fitting, and to increase the intensity of deflector, deflector is whole to be arranged vertically with door-plate formation,
Deflector, buffering plate, door-plate inner surface between form mazy buffer channel 48.It is logical of course for buffering is extended
The length in road can also add baffle on door-plate, and baffle is arranged vertically with door-plate, but between baffle and switch device cabinet bodies frame
Remain with gap.
Door-plate inner surface is fixedly installed the barrier structure that barrier is formed to buffer channel end, which includes
The interior fagging 49 being fixedly installed on door-plate, and the sealing element 50 being assemblied on interior fagging, sealing element can be steel bar, this is close
Sealing contacts sealing with switch device cabinet bodies formation.Socket is offered on sealing element, for the insertion of interior fagging；In Fig. 7,
Edge dam, the interior fagging shown is bent by door-plate edge and is bonded door-plate inner surface and extended to form.Interior fagging is that door-plate is curved
It folds edge dam and continues on its inner surface and be bent to form, the formation of the end and door-plate that bend out is arranged vertically, right
Sealing element forms support, and such structure is to enhance the intensity of door-plate, and guarantees preferable closure.Inside switch cabinet
When the arc accident that breaks down, in the pressure high temperature hot gas frontal impact of generation to buffering plate and be allowed to be deformed even can
It can melt, direction represented by the arrow in Fig. 7 is the flow direction from switchgear internal high pressure high-temperature gas, cushion chamber
Room can play certain buffer function to impact, and the indoor air of simultaneous buffering chamber also plays one to pressure high temperature hot gas
Fixed cooling effect, so that the door-plate in outside not will receive the destruction of gas substantially.Into door-plate and switch device cabinet bodies gap
A small amount of pressure high temperature hot gas at place, i.e., could be into after 90 degree are turned due to being formed certain buffering by labyrinth type buffer channel
Enter the gap between interior fagging and deflector, and be fully sealed part and stop, can not be ejected into outside cabinet body, can only be set from switch
The pressure relief opening at standby top is discharged to switchgear back upper place, even if having a small amount of gas to spray, since pressure and temperature is dropped significantly
It is low, adjacent compartments will not be damaged, while playing the role of good safeguard protection to equipment operations staff.
As shown in Fig. 8,9,10,11, the left rail that is equipped on the cabinet body of breaker chamber, voltage transformer room two sides
51, right guide rail 52, with to can withdraw-type voltage mutual inducer trolley, can withdraw-type circuit breaker cart formed support and move.It is removable
Open type voltage mutual inducer trolley, can withdraw-type circuit breaker cart respectively include handcart ontology 53, voltage transformer, breaker difference
It is assemblied on respective handcart ontology；Two idler wheels 54 are respectively arranged in handcart ontology both sides, in breaker chamber or/and electricity
Pressure is fixedly connected with braced frame 55 in mutual inductor room, selects to be in open circuit with specific reference to the size of switch cabinet inner space
Braced frame is arranged in room in device room, voltage transformer.The braced frame be in left rail in same room, right guide rail lower section and with
Two guide rails are fixedly connected, and to form fixed support to two guide rails, are fixedly installed on the support frame there are two locating piece 56,
Locating piece is square block, and location hole 57 is offered on locating piece, and location hole can may be for the blind hole not through locating piece
Through-hole；There are two positioning pin 58, positioning pin, which is inserted into correspondingly in location hole, forms limit for the front end fixed setting of handcart ontology
Position；One end of positioning pin is provided with screw thread and equipped with locking nut 59, which passes through handcart ontology and assemble upper locking nut
Positioning pin is fixedly connected on handcart ontology；Location hole includes the round hole section 61 that taper hole section 60 is connected to conical section, fixed
The outer diameter of position pin and the internal diameter of round hole section are adapted, and the front end of positioning pin is tapered end, in this way when handcart ontology push-on process
In, the tapered end of positioning pin front end can be inserted into round hole section by the guiding of taper hole section, even if to guarantee handcart ontology
Left and right also can smoothly cooperate between positioning pin and location hole there are when certain interval.
Braced frame 55 includes upper backup pad 62, lower supporting plate 63, and two between upper backup pad, lower supporting plate
The upper end of a side support plate, side support plate is fixedly connected with upper backup pad, and lower end is fixedly connected with lower supporting plate, upper backup pad,
Lower supporting plate and two side support plates enclose rectangular support；Upper backup pad is fixedly connected with left rail, right guide rail, lower support
Plate is fixedly connected with the bottom plate of switch device cabinet bodies, and side support plate is fixedly connected with the side plate of switch device cabinet bodies.Wherein, collateral
Fagging includes the upper supporting plate 64 being fixedly connected with upper backup pad, and the lower carrier plate 65 being fixedly connected with lower supporting plate, upper supporting plate is under
It is fixedly connected between supporting plate.In specific implementation, upper supporting plate is bent by downward 90 ° of upper backup pad, and lower carrier plate is by lower supporting plate
Upward 90 ° bend.Certainly, upper supporting plate, lower carrier plate may be individual plate, fix with upper backup pad, lower supporting plate
Connection.Wherein, upper backup pad, lower supporting plate both sides be respectively formed the flange of bending, the two sides also equal shape of upper supporting plate, lower carrier plate
At flange, the fixed connection point of upper supporting plate and lower carrier plate is on the flange of two supporting plate two sides, in this way with the strong of braced frame
Degree, while also increasing the compactness of upper lower carrier plate and switch device cabinet bodies side plate inner wall, promote the globality of connection.
It is fixedly installed on the bottom plate of switch device cabinet bodies there are two the bottom support frame 66 being fixedly connected with lower supporting plate,
It is arranged in parallel between two bottom support frames and the supporting surface for forming support to lower supporting plate is in the same plane, to support
Frame forms steady bearing.Lower supporting plate can be fixedly connected with switch device cabinet bodies bottom plate, bottom support frame simultaneously, can also be with
Directly it is fixedly connected on the support frame of bottom.
Left rail, right guide rail respectively include being horizontally fixed on the lower fagging 67 on switch device cabinet bodies side plate and fix
Top board 68 on lower fagging is formed between lower fagging upper surface and top board lower surface and is carried out for handcart ontology upper roller
The guide channel 69 of movement；Outward bending forms a fixed connection portion 70 in the middle part of top board or/and lower fagging, this is fixedly connected with portion
It is fixedly connected with switch device cabinet bodies side plate.The portion of plugging 71 is bent out on top board, insertion top board in the portion's of plugging plugs notch
Limit is formed in 72, to guarantee the assembly precision and connectivity robustness of top board Yu lower fagging；In order to guarantee to braced frame
The steady globality for supporting and being connect with switch device cabinet bodies, the bearing stepped plate 73 of the side plate lower part of switch device cabinet bodies
Lower supporting plate is formed and is supported, the upper surface for supporting stepped plate is not less than the upper surface of bottom support frame.In bearing stepped plate
Portion can be used for cabling, is formed and is closed to cabling.There are 2 positioning pins in handcart chassis vehicle Front-end Design, it is corresponding to be set in switch
Design has 2 locating pieces in standby braced frame, and the upper backup pad upper end in braced frame is fixed with left and right guide rail, support frame
The both side plate of frame and the side plate of switch device cabinet bodies are fixed, and the lower end of braced frame is fixed with two bottom support frames, two bottoms
Portion's support frame is then fixed on the bottom plate of switchgear.When handcart is at operating position, 2 positioning pins of handcart chassis vehicle front end
It is properly inserted in the guide-localization hole of the locating piece of installation on the support frame, after being cooperated due to the two substantially without between
Gap also limits handcart under the electrodynamic action generated by short trouble in left and right directions and the shake width of up and down direction
Degree, ensure that the dynamic and static contact of switchgear is reliable, also ensure that medium voltage switchgear equipment bears KA Rms, peak
Value tolerance electric current and the ability for cut-offfing short circuit current.The left and right rail of switchgear, fixed block, braced frame, bottom support
Frame, the side plate of switch device cabinet bodies and bottom plate all carry out gun iron link and secured, generation earthquake accident by Steel Bolt
When, guide rail and locating piece, Jin Erchuan can be transferred to by idler wheel and positioning pin by the active force that earthquake generates by acting on handcart
It is handed to braced frame, the side plate of switch device cabinet bodies, bottom support frame, bottom plate, is finally transmitted by the bottom plate of switch device cabinet bodies
It is balanced out to switchgear installation foundation, and then by the earth, ensure that the stability of handcart, guaranteed that switchgear has and bear
KA Rms peak value tolerance electric current, cut-offs the ability of short circuit current, while guaranteeing that medium voltage switchgear equipment accelerates in horizontal direction
Degree is 5.1788g, still is able to safely and reliably run under geological process from 7.0818g to acceleration that be vertically, and is had above
Respective capabilities fully meet three generations nuclear power plant to the technical requirements of medium voltage switchgear equipment.
Claims (8)
1. nuclear-power reactor main pump switchgear, which includes at least first switch device, second switch device, first switch
The power input of device is formed by frequency converter and power supply line and is connected, and the power output end of first switch device is opened with second
The power input for closing device forms connection, and the power output end of second switch device is formed with main reactor pump for being electrically connected,
It is characterized in that, first switch device, second switch device are the main pump switchgear of different safe power supply sequences；Simultaneously to first
When switching device, second switch device input safe trip signal, the switching device of at least one safe power supply sequence is disconnected,
Stop being that main reactor pump is powered；When to first switch device, second switch device input enabling signal, two safe power supplies
The switching device of sequence forms series connection and is powered for main reactor pump；
The first switch device, second switch device respectively include switch cabinet, are disposed with open circuit in respective switch cabinet
Device, current transformer, voltage transformer, earthing switch, switch protection controller；Current transformer, voltage transformer will be respective
Collected data information transfer gives switch protection controller；
The output end of breaker, voltage transformer and frequency converter in the first switch device is electrically connected by service cable formation
It connects, the output end of breaker passes through breaker, voltage in a cable and second switch device after connecting with current transformer
Mutual inductor forms electrical connection, the breaker output end in second switch device pass through after connect with current transformer outlet cable and
Main reactor pump forms connection；
Inside switch cabinet by partition be isolated into inlet wire cable vault, breaker chamber, voltage transformer room, outlet cable room,
Secondary meter control room；Breaker is assemblied in breaker chamber, and voltage transformer is assemblied in voltage transformer room, switch protection
Controller is assemblied in secondary meter control room；
The arc-proof structure that electric arc blocking is carried out at end of door plate is provided on the switch cabinet, which includes fixing
The buffering plate of door-plate inner surface is set,
The edge for buffering plate is bonded with the formation of door-plate inner surface, the table on the inside of the inner surface and door-plate of buffering plate
Buffer chamber is formed between face；
It is provided at the edge of door-plate inner surface and forms the edge dam being bonded, edge dam and switch cabinet with switch cabinet
Fitting forms sealing；
The deflector for extend but do not contact towards door-plate inner surface door-plate inner surface is provided on switch cabinet,
Deflector, buffering plate, door-plate inner surface between form mazy buffer channel；
The door-plate inner surface is fixedly installed the barrier structure that barrier is formed to buffer channel end, which includes
The interior fagging being fixedly installed on door-plate, and the sealing element being assemblied on interior fagging, the sealing element connect with switch cabinet formation
Touching sealing；
It is provided in the intracorporal outlet cable room of second switch device switchgear and is isolated with its internal outlet cable room, with
For the cable channel isolation of a cable routing.
2. nuclear-power reactor main pump switchgear as described in claim 1, which is characterized in that the earthing switch includes being assemblied in
Pedestal in switch cabinet, the three phase isolated being set on pedestal, are equipped with static contact above each insulator, and
The operating shaft being rotatably dispose on pedestal, be equipped in the operating shaft with the one-to-one three-phase moving contact of static contact, each
At least there is spaced apart two contact blocks on static contact；
Each moving contact at least has there are two contact patch, in each contact patch includes two and is formed and contact with same contact block
The contact chip of cooperation；
When moving contact and static contact are engaged, two contact chips in same contact patch clamp the formation of same contact block
State；
Generating contact pressure to two contact chips at least provided with one between two contact chips in same contact patch makes two
A contact chip clamps the elastic clamp device of same contact block.
3. nuclear-power reactor main pump switchgear as claimed in claim 2, which is characterized in that be at least arranged on each contact chip
There are two form the contact portion being engaged, arranged for interval between adjacent contact with same contact block side.
4. nuclear-power reactor main pump switchgear as claimed in claim 2, which is characterized in that the elastic clamp device is set to
Same contact block is formed in two contact chips of state of clamping between the contact portion of corresponding position.
5. nuclear-power reactor main pump switchgear as claimed in claim 2 or 3 or 4, which is characterized in that the elastic clamp device
Including bolt, compressed spring, locking nut, bolt connects two contact chips in same contact patch, in two contact chips
Between form insertion space be inserted into for contact block, compressed spring is assemblied on the bolt on the outside of contact chip to contact chip formation bullet
Property top power, the locking nut is assemblied on bolt to form compressed spring and limit；When contact block is between two contact chips
Insertion space when, under the action of compressed spring, two contact chips to contact block formation clamp state.
6. nuclear-power reactor main pump switchgear as claimed in claim 2 or 3 or 4, which is characterized in that the breaker chamber, electricity
Pressure is respectively arranged with handcart in mutual inductor room, left rail, right guide rail is equipped on the side plate of switch cabinet, handcart is led on a left side
It is moved on rail, right guide rail, is fixedly connected with braced frame in the switch cabinet, which is in left rail, right guide rail
Lower section is simultaneously fixedly connected with two guide rails, on the support frame locating piece there are two fixed setting, offers positioning on locating piece
Hole, there are two positioning pin, positioning pin, which is inserted into correspondingly in location hole, forms limit for the front end fixed setting of the handcart；Institute
Stating location hole includes the round hole section that taper hole section is connected to conical section, and the outer diameter of positioning pin and the internal diameter of round hole section are mutually fitted
It answers, the front end of the positioning pin is tapered end.
7. nuclear-power reactor main pump switchgear as claimed in claim 6, which is characterized in that the braced frame includes upper support
Plate, lower supporting plate, and two side support plates between upper backup pad, lower supporting plate, the upper end of side support plate and upper branch
Fagging is fixedly connected, and lower end is fixedly connected with lower supporting plate, and the upper backup pad, lower supporting plate and two side support plates enclose
Rectangular support；Upper backup pad is fixedly connected with left rail, right guide rail, and lower supporting plate is fixedly connected with switch cabinet, collateral support
Plate is fixedly connected with the side plate of switch cabinet；
The side support plate includes the upper supporting plate being fixedly connected with upper backup pad, the lower carrier plate being fixedly connected with lower supporting plate, on
It is fixedly connected between supporting plate and lower carrier plate；
The upper supporting plate is bent by downward 90 ° of upper backup pad, and lower carrier plate is bent by upward 90 ° of lower supporting plate；
The left rail, right guide rail respectively include being horizontally fixed on the lower fagging on switch cabinet side plate and are fixed on lower support
Top board on plate is formed between lower fagging upper surface and lower fagging lower surface and is led for what handcart ontology upper roller was moved
To channel；Outward bending forms a fixed connection portion in the middle part of the top board or/and lower fagging, this is fixedly connected with portion and switch cabinet
Side plate is fixedly connected.
8. nuclear-power reactor main pump switchgear as described in claim 1, which is characterized in that cloth in the secondary meter control room
It sets metal partion (metp) and interior is isolated into 1E grades of control loop compartments and non-1E grades of control loop compartment, metal partion (metp) is by a metal
Plate is horizontal or vertical to be arranged in secondary meter control room；Or two pieces, two pieces or more metal partion (metp) superposition after it is horizontal or vertical
It is arranged in secondary meter control room, forms cavity between adjacent metal partition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710169503.5A CN106911086B (en) | 2017-03-21 | 2017-03-21 | Nuclear-power reactor main pump switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710169503.5A CN106911086B (en) | 2017-03-21 | 2017-03-21 | Nuclear-power reactor main pump switchgear |
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| Publication Number | Publication Date |
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| CN106911086A CN106911086A (en) | 2017-06-30 |
| CN106911086B true CN106911086B (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710169503.5A Active CN106911086B (en) | 2017-03-21 | 2017-03-21 | Nuclear-power reactor main pump switchgear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113794146A (en) * | 2021-09-15 | 2021-12-14 | 上海平高天灵开关有限公司 | Handcart circuit breaker shock-resistant structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201061141Y (en) * | 2007-06-29 | 2008-05-14 | 安徽菲迈斯电气有限公司 | Armoured withdraw type arc extinguishing switch device |
| CN101267092B (en) * | 2007-11-01 | 2011-04-20 | 天水长城开关厂有限公司 | Mobile open high-current switch case connection device |
| JP4727736B2 (en) * | 2009-02-19 | 2011-07-20 | 株式会社日立製作所 | Switchgear |
| CN201444551U (en) * | 2009-06-29 | 2010-04-28 | 青岛特锐德电气股份有限公司 | Safety protection device for movable switch cabinet |
| CN201845691U (en) * | 2010-10-28 | 2011-05-25 | 上海西门子开关有限公司 | Grounding switch and switch cabinet provided with same |
| CN206931849U (en) * | 2017-03-21 | 2018-01-26 | 江苏华冠电器集团有限公司 | Nuclear-power reactor main pump switch cubicle |
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Inventor after: Liu Junfeng Inventor after: Wu Qiaolan Inventor after: Wu Yihu Inventor after: Zheng Yunbo Inventor after: Chen Lei Inventor after: Weng Xingfeng Inventor after: Lu Peifang Inventor after: Zhang Die Inventor after: Dong Hongjie Inventor after: Zhang Xiangao Inventor after: Xie Yongjian Inventor before: Liu Junfeng Inventor before: Zheng Yunbo Inventor before: Weng Xingfeng Inventor before: Zhang Xiangao Inventor before: Xie Yongjian Inventor before: Wu Qiaolan Inventor before: Wu Yihu Inventor before: Zhang Li |
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Effective date of registration: 20170731 Address after: 213000 Changzhou, new North District, Luo town, Tang Zhuang Bridge Road, No. 2 Applicant after: JIANGSU HUAGUAN ELECTRICAL EQUIPMENT GROUP Co.,Ltd. Applicant after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Address before: 213000, Jiangsu, Changzhou province Luo Luo Road, town, No. 2 Applicant before: JIANGSU HUAGUAN ELECTRICAL EQUIPMENT GROUP Co.,Ltd. |
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Address after: 213000 No.2 tangzhuangqiao Road, Luoxi Town, Xinbei District, Changzhou City, Jiangsu Province Patentee after: JIANGSU HUAGUAN ELECTRICAL EQUIPMENT GROUP Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 213000 No.2 tangzhuangqiao Road, Luoxi Town, Xinbei District, Changzhou City, Jiangsu Province Patentee before: JIANGSU HUAGUAN ELECTRICAL EQUIPMENT GROUP Co.,Ltd. Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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