CN114360966A - Contactor with enhanced magnetic field guiding arc extinguishing chamber - Google Patents
Contactor with enhanced magnetic field guiding arc extinguishing chamber Download PDFInfo
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- CN114360966A CN114360966A CN202210015607.1A CN202210015607A CN114360966A CN 114360966 A CN114360966 A CN 114360966A CN 202210015607 A CN202210015607 A CN 202210015607A CN 114360966 A CN114360966 A CN 114360966A
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Abstract
The utility model relates to a take contactor of reinforcing magnetic field direction explosion chamber, a take contactor of reinforcing magnetic field direction explosion chamber includes contactor body, casing and explosion chamber, sets up a plurality of arc extinguishing bars pieces in the explosion chamber, contactor body sets up a plurality of contacts, and the clearance is left with the arc extinguishing bars piece to the contact, contactor body and explosion chamber set up in the casing, contactor body still includes first magnetism and blows mechanism and second magnetism, first magnetism blows the mechanism and includes that two sets of symmetries set up in the casing outside and lie in the magnetizer of arc extinguishing bars piece both sides, second magnetism blows the mechanism and includes two sets of solenoid, and two sets of solenoid are parallelly connected with the contact, and the magnetomotive force that sets up in contact both sides and produce side by side is opposite. According to the contactor with the enhanced magnetic field guide arc extinguish chamber, the longitudinal magnetic field intensity is enhanced by utilizing the group of magnetizers and the two groups of electromagnetic coils connected in parallel, so that the middle part of the contactor is weak, the two sides of the contactor are strong, and the current breaking capacity of the contactor is greatly improved.
Description
Technical Field
The invention relates to the field of contactors, in particular to a contactor with a magnetic field enhancement guide arc extinguishing chamber.
Background
In a contact electric appliance, the process of making and breaking the current by the contact is often accompanied by the generation and extinction of an electric arc. The arc is a gas discharge phenomenon and has certain harm to electrical appliances. The method of using the force of magnetic field to current to achieve arc extinction is called magnetic quenching. When a large electromotive force is required to blow the arc into the arc extinguishing chamber, a special magnetic blow coil is used to establish a sufficiently strong magnetic field. It typically has one to several turns in series with the contact. In order to make the magnetic field be more concentratedly distributed in the arc region to increase the arc blowing force, the center of the coil is penetrated with an iron core, and two ends of the iron core are parallelly provided with magnetic conductive steel plates for clamping the arc extinguishing chamber. The arc blowing effect of the series magnetic blowing coil is obvious when the contact breaks large current and is poor when the contact breaks small current.
The method of using gas to blow the arc longitudinally or transversely to cool and elongate the arc in the gas flow, resulting in strong deionization is called gas blast arc extinction. Gas blast arc extinction utilizes compressed air to extinguish the arc. The compressed air acts on the electric arc, can well cool the electric arc, improve the pressure of an electric arc area and quickly take away residual free gas, so that the arc extinction performance is higher. Compressed air is blown in along the radial direction of the electric arc and then is exhausted to the atmosphere through a nozzle and an inner hole of the movable contact, and the arc root of the electric arc can be blown off from the surface of the contact quickly, so that the contact surface of the contact is not easy to burn. Because the pressure of the compressed air is irrelevant to the electric arc, when the air-blast arc extinguishing device is used for extinguishing arc, the over-voltage is easy to cause when the small-current electric arc is extinguished, and the arc-flying phenomenon can be generated after the electric arc is taken out by air flow generated by the air-blast arc extinguishing device, so that the contactor is very easy to damage.
Therefore, there is an urgent need for a contactor having arc extinguishing chambers that cut off small and large currents and can complement each other, and chinese patent publication No.: CN205303389U, the name of the invention is: the utility model provides a circuit breaker with arc extinguishing mechanism who possesses magnetic blow and gas blowing function, discloses a circuit breaker with arc extinguishing mechanism who possesses magnetic blow and gas blowing function, including casing magnetic blow device and product board, is equipped with arc extinguishing mechanism and operating device in the casing, operating device is including corresponding moving contact and the static contact that is equipped with, arc extinguishing mechanism includes the explosion chamber, be equipped with the stationary contact on the static contact, the explosion chamber with the stationary contact corresponds the setting, and magnetic blow device and product board correspond locate between static contact and the explosion chamber and be used for the electric arc direction explosion chamber that produces when opening the static contact with the repulsion moving contact. The disadvantages are that: the invention concentrates the magnetic field and blows, but when the small current is cut off, the blowing effect is poor, and the overvoltage is easy to be caused when the small current arc is extinguished.
The invention provides a contactor with a magnetic field guide arc extinguish chamber, which utilizes a group of magnetizers and two groups of electromagnetic coils connected in parallel to strengthen the longitudinal magnetic field intensity, so that the middle part is weak, the two sides are strong, the capacity of breaking small current of the contactor is greatly improved, and a linked gas generating mechanism and a plurality of groups of clamping plates for blocking electric arcs from flying out are used, so that the large current can be well broken, and the effect of zero arcing can be ensured.
Disclosure of Invention
The invention aims to provide a contactor with a guide arc extinguish chamber for enhancing a magnetic field, which aims to solve the problems in the prior art.
The invention provides the following technical scheme: the utility model provides a take contactor of reinforcing magnetic field direction explosion chamber, includes contactor body, casing and explosion chamber, set up a plurality of arc extinguishing bars pieces in the explosion chamber, the contactor body includes a plurality of contacts, first magnetism blows mechanism and second magnetism and blows the mechanism, and the contact can move for separating brake and combined floodgate, and leave the clearance with the arc extinguishing bars piece, contactor body and explosion chamber set up in the casing. The first magnetic blow-out mechanism comprises two groups of magnetizers which are symmetrically arranged on the outer side of the shell and positioned on two sides of the arc extinguishing grid piece, and the second magnetic blow-out mechanism comprises two groups of electromagnetic coils which are connected in parallel with the contact and are arranged on two sides of the contact side by side, and the generated magnetic potentials are opposite. The electromagnetic coil with opposite magnetic potential can generate a equidirectional magnetic field in the inner area and the outer area of the electromagnetic coil, so that the magnetic field intensity of the second magnetic blowing mechanism can be enhanced according to the current intensity when the contacts are contacted, the magnetizer enables the middle of the magnetic field of the arc-extinguishing grid sheet and the contact gap area to be weaker, the two sides of the magnetic field to be stronger, the magnetic field of the second magnetic blowing mechanism is amplified, the magnetic field of the electromagnetic coil can be exerted in the arc-extinguishing grid sheet and the contact gap area, the electromagnetic coil can automatically adapt to the arc length, the electric arc is elongated to be extinguished at the arc-extinguishing grid sheet, the effect of breaking the small current of the arc-extinguishing chamber is improved, and meanwhile, the large current can be broken.
Further, the contact comprises a fixed contact and a moving contact, the moving contact comprises a plurality of spiral contacts and an action part, the action part is movably connected to the contactor body, the action part extends to form a cantilever and is provided with the spiral contacts, and a plurality of cambered surface grooves corresponding to the spiral contacts one to one are formed in the connection position of the fixed contact and the moving contact. Through the relative rotation of the action part, the spiral contact is contacted with or separated from the arc-shaped groove, and the contact opening and closing are realized. Adopt spiral contact to guarantee the good contact of static contact and moving contact, even if spiral contact partial wear, still can realize the contact of moving contact and static contact, connection reliability is strong to can break up into little electric arc through the point contact of cambered surface original big electric arc, the rethread first magnetism blows mechanism and second magnetism and blows the mechanism and elongate a plurality of little electric arcs to arc extinguishing grid piece department and extinguish, and the arc extinguishing effect is better.
Furthermore, the spiral contacts are arranged in a row at equal intervals, the spiral contacts can prevent the static contact and the moving contact from being connected and losing efficacy due to abrasion or poor contact of one or part of the spiral contacts, the spiral contacts are cones, spiral linear grooves are formed in the side faces of the spiral contacts, the arc-shaped grooves are hemispherical surfaces, the static contact and the moving contact are in point contact, and the static contact and the moving contact are both communicated after any one or more spiral contacts are in contact with the arc-shaped grooves. The spiral line type groove gives a deformation space for the spiral contact, the spiral contact is contacted and electrified with the cambered surface groove to generate heat inevitably, the contact point of the contact is made of metal, and the metal is heated to expand, so that after the spiral contact is heated in the cambered surface groove, a plurality of original point contacts form a plurality of area surface contacts, and the connecting effect of the static contact and the moving contact is better.
Furthermore, the contactor body further comprises a gas generating mechanism, the gas generating mechanism comprises two groups of side gas plates which are perpendicular to the arc extinguishing grid pieces and are arranged on two sides of the arc extinguishing grid pieces and a group of bottom gas plates arranged at the lower ends of the arc extinguishing grid pieces, and gas generating materials are arranged on the inner surfaces of the side gas plates and the upper surfaces of the bottom gas plates. When the contact passes through a large current, the temperature in the arc extinguishing chamber can be raised, the gas generating material can generate a large amount of gas under high temperature, the two groups of side gas plates generate gas at the side parts of the arc extinguishing grid pieces, the bottom gas plate generates gas at the lower ends of the arc extinguishing grid pieces, and the electric arc is guided by the magnetic field to enter the arc extinguishing grid pieces from the bottom gas plate, so that the gas generated by the bottom gas plate can help the electric arc to enter the arc extinguishing grid pieces, the gas of the side gas plates enables the electric arc to stay at the arc extinguishing grid pieces, and the electric arc is elongated and extinguished.
Furthermore, the gas generating mechanism further comprises an elastic piece and a rotating shaft, two ends of the rotating shaft are hinged to the shell, one end of the bottom gas plate penetrates through the rotating shaft, and the other end of the bottom gas plate is arranged at the lower end of the arc extinguishing grid plate in a suspended mode. One end of the elastic piece is fixed on the shell and positioned on the upper side of the rotating shaft, and the other end of the elastic piece is fixed on the upper side of the bottom air plate far away from one end of the rotating shaft. When the contactor cuts off the small current, the elastic piece normally stretches, the bottom air plate does not generate gas, even if the gas is generated, the elastic piece does not act, the gas directly enters the arc extinguish chamber and does not pass through the contact area, and the arc of the small current arc is extinguished by the first magnetic blow mechanism and the second magnetic blow mechanism. When the contactor breaks off a large current, the temperature in the arc extinguishing chamber rises under the large current, the elastic piece is heated to expand, and the bottom air plate is extruded to rotate downwards along the rotating shaft, so that the gas can be fully contacted with the electric arc, and the arc extinguishing effect is improved.
Furthermore, the arc extinguishing bars are sheet-shaped, herringbone concave edges are formed upwards from the bottom, a plurality of supporting blocks protrude from two sides, the side air plates are provided with mounting grooves matched with the supporting blocks, the side air plates are inserted into the mounting grooves through the supporting blocks and mounted on two sides of the arc extinguishing bars, the mounting is compact, the flow of gas is limited, and the gas is prevented from flowing reversely. The gas generating material is coated on the side gas plate area between the supporting blocks of the two adjacent arc-extinguishing grid pieces, the contact part of the side gas plate and the arc-extinguishing grid pieces is a non-gas generating material area, and gas can be generated only at the gaps between the arc-extinguishing grid pieces, so that the gas can transversely stretch the arc at the arc-extinguishing grid pieces until the arc is extinguished.
Furthermore, the arc extinguish chamber also comprises a wire mesh, a middle plate, an insulating partition plate and a baffle plate, wherein the middle plate is arranged at the upper ends of the arc extinguish grid pieces, a row of a plurality of air inlets are vertically arranged between every two arc extinguish grid pieces of the middle plate and used for gas of the gas generating mechanism to overflow, and the middle plate is transversely provided with a plurality of side holes at equal intervals, the side holes are communicated with the air inlet holes, gas and residual electric arc generated from two sides enter the wire netting from the side holes, the iron wire net is arranged at the upper end of the middle plate and is formed by combining a plurality of metal wires which are alternately connected in a longitudinal and transverse mode, the insulating partition plate is annularly arranged at the upper end of the wire netting and is contacted with the upper end of the shell, a plurality of air outlet holes are arranged at the upper end of the shell, the baffle plate is arranged below the air outlet holes, two ends of the baffle plate are in interference hinge joint with the upper end of the shell, the baffle plate can transversely rotate relative to the shell, a handle is arranged at the upper end of the baffle plate in a protruding mode, and the handle is used for manually adjusting the inclination angle of the baffle plate. The handle can partially cover the air outlet hole through the inclination angle of the rotating baffle plate, so that the air outlet rate of the arc extinguish chamber is controlled. After the arc is broken in the arc-extinguishing grid sheet by elongation, when large current is broken, part of the arc flies out from the air inlet hole, the wire mesh has the effect of intercepting the arc flying out for the first time, the insulating partition plate gathers the arc at the wire mesh, and finally, the gas flows out from the air outlet hole, and the arc is blocked at the wire mesh.
Furthermore, a linkage device is arranged between the moving contact and the arc extinguish chamber, the linkage device comprises a cam, a linkage rod and a telescopic rod, and the cam comprises a boss A, a boss B and a rotating part. Protruding portion A and protruding portion B are protruding and be central symmetry on the rotating part. One end of the telescopic rod is fixedly connected with the moving contact, the other end of the telescopic rod is hinged to the protruding portion A, the rotating portion is hinged to the shell, the lower end of the linkage rod is hinged to the protruding portion B, the middle of the linkage rod is hinged to one side, away from the rotating shaft, of the bottom air plate, the upper end of the linkage rod is hinged to the upper end of the baffle, the protruding portion A and the protruding portion B can enable the linkage rod and the telescopic rod to rotate in opposite directions, and the linkage device is arranged on the inner side of the shell. The handle can also cooperate with a linkage for manually correcting cam dead center positions. When moving contact and static contact divide absolutely disconnected, the moving contact rotates to the left, and drive the telescopic link and remove left, the telescopic link drives bellying A and rotates, bellying A drives the rotating part rotation again, thereby make bellying B rotate right, the gangbar rotates right along with bellying B, drive the end gas board in the middle of the gangbar, the upper end drives the baffle, make the end gas board shift up, the end gas board produces the air current and can directly aim at electric arc, and the baffle is opened completely, make gaseous venthole that can flow out fast, improve the arc extinguishing effect. When the moving contact and the static contact are suddenly disconnected to generate small current, the gas generating material cannot generate gas, the elastic piece can press the bottom gas plate to enable the bottom gas plate not to act, and at the moment, magnetic quenching is carried out only by the first magnetic quenching mechanism and the second magnetic quenching mechanism.
Further, the explosion chamber still includes the baffler, the baffler sets up between baffle and insulating barrier, is located below the baffle, and vertically runs through and sets up a plurality of interception holes, and the interception hole does not cover inlet port and venthole in the projection position of vertical direction to make electric arc can't directly follow inlet port and venthole departure, even if electric arc departure wire netting also can be intercepted by the baffler, and the venthole normal outflow can be followed to the air current in the casing, reaches the effect of zero flashover.
Furthermore, the magnetizer is sheet-shaped, one end of the magnetizer is wide and the other end of the magnetizer is narrow, the magnetizer is fixed on the outer side of the shell and covers the gap between the arc-extinguishing grid sheet and the contact, the inner side of the outer side of the shell is concave to form an inserting groove matched with the appearance of the magnetizer, the magnetizer is inserted into the inserting groove from the wide end, and the magnetizer is flush with the outer surface of the shell. The magnetizer is arranged on the outer side of the shell, so that the magnetizer is convenient to mount, can be selected to be dismounted or mounted according to actual needs, and is convenient to use.
Compared with the prior art, the invention has the following beneficial effects:
1. the electromagnetic coils with opposite magnetic potentials are arranged on the contacts, and can generate magnetic fields in the same direction in the inner and outer regions of the contacts, so that the magnetic field intensity is changed according to the disjunction current intensity of the contacts, the magnetizer can amplify the magnetic field generated by the electromagnetic coils, the middle of the magnetic field is weaker, the two sides of the magnetic field are stronger, and the magnetizer plays a role in the gap between the arc extinguishing grid sheet and the contacts, so that the effect that the magnetic field intensity automatically adapts to the arc length is realized, and the disjunction small current effect of the arc extinguishing chamber is improved;
2. the spiral contact can ensure good contact between the static contact and the moving contact, even if the spiral contact is partially abraded, the moving contact can still be contacted with the static contact, the connection reliability is high, the original large electric arc is scattered into small electric arcs through point contact of the cambered surface, the small electric arcs are elongated to the arc-extinguishing grid piece to be extinguished through the first magnetic blowing mechanism and the second magnetic blowing mechanism, and the arc-extinguishing effect is better;
3. the gas generating mechanism is arranged, gas can be generated on two sides of the arc extinguishing grid piece and between the arc extinguishing grid piece and the contact when a large current is cut off, gas blowing auxiliary arc extinguishing is formed, the gas direction can be automatically adjusted by the bottom gas plate along with the current, the gas blowing effect is enhanced, the bottom gas plate does not act when a small current is cut off, the magnetic blowing effect is not influenced, and the compatibility and the reliability are high;
4. the automatic arc extinguishing device is provided with a linkage device and a plurality of groups of clamping plates for blocking the arc from flying out, and the gas generating mechanism is automatically triggered and provided with arc extinguishing grid pieces for arc extinguishing, baffles for blocking the arc, a blocking plate, a wire mesh and the like by utilizing the disjunction linkage of the moving contact and the static contact, so that the zero-arcing effect can be ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic external view of a contactor with enhanced field-oriented arc chute of the present invention;
FIG. 2 is an internal schematic view of a contactor with enhanced magnetic field guidance arc chute of the present invention;
FIG. 3 is a schematic view of the spiral contacts of a contactor with enhanced magnetic field guidance arc chute of the present invention;
FIG. 4 is a schematic view of a linkage of a contactor with enhanced magnetic field guidance arc chute of the present invention;
FIG. 5 is a partial schematic view of an arc chute of a contactor with an enhanced magnetic field directed arc chute of the present invention;
in the figure: 1. the contactor comprises a contactor body, 2, a shell, 201, an air outlet hole, 3, an arc extinguishing grid piece, 301, a supporting block, 4, a magnetizer, 5, a static contact, 501, an arc groove, 6, a moving contact, 601, a spiral contact, 602, an action part, 7, a side air plate, 8, a bottom air plate, 9, an elastic part, 10, a rotating shaft, 11, a wire mesh, 12, a middle plate, 121, an air inlet hole, 122, a side hole, 13, an insulating partition plate, 14, a baffle, 15, a linkage rod, 16, a telescopic rod, 17, a bulge A, 18, a bulge B, 19, a rotating part, 20 and a blocking plate.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-5, the present invention provides the following technical solutions: the invention relates to a contactor with a magnetic field enhancement guide arc extinguishing chamber, which comprises a contactor body 1, a shell 2 and the arc extinguishing chamber, wherein an arc extinguishing grid 3 is arranged in the arc extinguishing chamber, the contactor body 1 comprises a contact, a first magnetic blowing mechanism, a second magnetic blowing mechanism and an air generating mechanism, the contact can act, a gap is reserved between the contact and the arc extinguishing grid 3, an electric arc is elongated at the gap and is guided to the arc extinguishing grid 3 from the contact by the first magnetic blowing mechanism and the second magnetic blowing mechanism to be extinguished, and the contactor body 1 and the arc extinguishing chamber are arranged in the shell 2. First magnetic blow-out mechanism includes that two sets of symmetries set up in the casing 2 outside and lie in the magnetizer 4 of arc extinguishing bars piece 3 both sides, and magnetizer 4 arranges with arc extinguishing bars piece 3 is perpendicular, and second magnetic blow-out mechanism includes two sets of solenoid, two sets of solenoid are parallelly connected with the contact, and the magnetic potential that produces is opposite, sets up in the contact both sides side by side. The opposite solenoid of magnetic potential can produce the magnetic field of syntropy in its inside and outside region to can change magnetic field intensity according to the current strength when the contact contacts, magnetizer 4 strengthens the magnetic field intensity in arc extinguishing bars piece 3 and contact clearance region, makes its middle weaker, and both sides are stronger, has enlarged magnetic field intensity, thereby makes magnetic field intensity automatically adapt to the arc length strong and weak, prolongs electric arc to 3 departments of arc extinguishing bars piece and extinguish, has improved the effect that the explosion chamber divides the disconnected undercurrent, also can divide the disconnected heavy current simultaneously. Magnetizer 4 is the slice, and the material is electrician's pure iron, and the wide one end of one end is narrow, fixes in the casing 2 outside, and covers arc extinguishing bars piece 3 and the clearance department of contact, 2 outside indent formation of casing and 4 appearance matching's slots, magnetizer 4 inserts the slot from wide end, and magnetizer 4 flushes with 2 surfaces of casing, installs compactly.
The contact includes static contact 5 and moving contact 6, and moving contact 6 includes four group's spiral contact 601 and action portion 602, and action portion 602 is the axle, and both ends swing joint is on contactor body 1, and action portion 602 forms the cantilever to the inside extension of casing 2, is close to the inside one side of casing 2 and sets up spiral contact 601, and the cantilever is close to arc extinguishing bars piece 3 one side and is the cambered surface, and action portion 602 keeps away from the inside one side of casing 2 and outwards bulges and form the handle and set up in the casing 2 outside. Four groups of cambered surface grooves 501 corresponding to the spiral contacts 601 one by one are arranged at the joints of the fixed contact 5 and the movable contact 6. Through the relative rotation of the action part 602, the spiral contact 601 is contacted with or separated from the arc-shaped groove 501, and the opening and closing of the contactor are realized. Adopt spiral contact 601 can guarantee the good contact of static contact 5 and moving contact 6, even if spiral contact 601 partial wear, the contactor still can realize moving contact 6 and static contact 5's contact, connect the good reliability, and break up into little electric arc through the point contact of cambered surface with original big electric arc, rethread first magnetism blows mechanism and second magnetism and blows the mechanism and elongate a plurality of little electric arcs to 3 departments of arc extinguishing bars and extinguish, the arc extinguishing speed piece, the probability that the flash of arc appears is little.
The four sets of spiral contacts 601 are equally spaced to form a row. The spiral contacts 601 are cones, spiral linear grooves are formed in the side faces of the spiral contacts, the cambered surface groove 501 is a hemispherical surface, the static contact 5 and the moving contact 6 are in point contact, and the static contact 5 and the moving contact 6 are both communicated after any one or more spiral contacts 601 are in contact with the cambered surface groove 501, so that the moving contact 6 and the static contact 5 can be effectively connected even if part of the spiral contacts 601 fails. The spiral linear groove provides an expansion and expansion deformation space for the spiral contact 601, heat is inevitably generated after the spiral contact 601 is in contact with and electrified with the arc-shaped groove 501, and the contact point of the contact is made of metal which expands when heated in the arc-shaped groove 501, so that a plurality of original point contacts form a plurality of area surface contacts after the spiral contact 601 is heated in the arc-shaped groove 501, so that the connection effect of the static contact 5 and the moving contact 6 is better, and the normal breaking of the static contact 5 and the moving contact 6 is not influenced by only changing the contact area of the static contact 5 and the moving contact 6.
The gas generating mechanism comprises two groups of side gas plates 7 which are vertical to the arc extinguishing grid pieces 3 and are arranged on two sides of the arc extinguishing grid pieces 3, a group of bottom gas plates 8 arranged at the lower ends of the arc extinguishing grid pieces 3, an elastic piece 9 and a rotating shaft 10, wherein gas generating materials are arranged on the inner surfaces of the side gas plates 7 and the upper surfaces of the bottom gas plates 8, and the gas generating materials are melamine. Two ends of the rotating shaft 10 are hinged on the shell 2, one end of the bottom air plate 8 penetrates through the rotating shaft 10, and the other end of the bottom air plate is arranged at the lower end of the arc extinguishing grid piece 3 in a hanging mode. One end of the elastic element 9 is fixed on the shell 2 and is located on the upper side of the rotating shaft 10, and the other end is fixed on the upper side of the end of the bottom air plate 8 far away from the rotating shaft 10. When the contactor cuts off the small current, the elastic piece 9 is normally stretched, the bottom air plate 8 does not generate gas, even if the gas is generated, the elastic piece 9 does not act, the gas directly enters the arc extinguish chamber and cannot pass through a contact area, and arc extinction is carried out on the small current electric arc by the first magnetic blow-out mechanism and the second magnetic blow-out mechanism. When the contactor cuts off large current, the temperature in the arc extinguish chamber rises under the large current, the elastic piece 9 is heated and expanded, and the bottom gas plate 8 is pressed to rotate downwards along the rotating shaft 10, so that gas can be fully contacted with the electric arc and flows upwards, and the electric arc is stretched and guided to the arc extinguish grid piece 3. When the contact passes through the heavy current, can make the interior temperature of arc extinguishing chamber rise, it can produce a large amount of gas to produce the gas material and receive high temperature, two sets of side gas boards 7 produce gas at arc extinguishing bars piece 3 lateral part, end gas board 8 produces gas at arc extinguishing bars piece 3 lower extreme, and electric arc is got into arc extinguishing bars piece 3 from end gas board 8 by the magnetic field guide, consequently, the gas that end gas board 8 produced can help electric arc to get into arc extinguishing bars piece 3, electric arc also can be elongated in the air current and cool off, and the gas of side gas board 7 makes electric arc stop in arc extinguishing bars piece 3 department, electric arc is finally elongated by arc extinguishing bars piece 3 and is extinguished.
Arc extinguishing bars piece 3 is the slice, from the bottom up set up chevron shape indent limit, the outstanding symmetry in both sides sets up six groups of supporting shoe 301, side gas board 7 sets up the mounting groove that matches with supporting shoe 301, and side gas board 7 inserts the mounting groove through supporting shoe 301 and installs in arc extinguishing bars piece 3 both sides, and the installation is compact to the flow of gas has been restricted, prevents that gas from flowing in the opposite direction. The gas generating material is coated on the area of the side gas plate 7 between the supporting blocks 301 of the two adjacent arc-extinguishing grid pieces 3, the contact part of the side gas plate 7 and the arc-extinguishing grid pieces 3 is a non-gas generating material area, and gas can be generated only at the gap between the arc-extinguishing grid pieces 3, so that the gas can transversely stretch the arc at the arc-extinguishing grid pieces 3 until the arc is extinguished.
The explosion chamber still includes wire netting 11, intermediate lamella 12, insulating barrier 13, baffle 14 and baffler 20, intermediate lamella 12 sets up in arc extinguishing bars piece 3 upper end, and intermediate lamella 12 is vertical between two liang of arc extinguishing bars pieces to set up one row of inlet port 121, and the air inlet is the through-hole of rectangle cross-section, and inlet port 121 is used for producing the gaseous overflow of gas mechanism, and intermediate lamella 12 horizontal equidistance interval runs through and sets up six groups of side openings 122, and side opening 122 and inlet port 121 switch-on, and the gas that produces from both sides and surplus electric arc get into wire netting 11 from side opening 122, wire netting 11 sets up in intermediate lamella 12 upper end, is formed by the wire combination of a plurality of vertical and horizontal alternate connections. Insulating barrier 13 sets up in wire netting 11 upper end for the annular, and insulating barrier 13 and 2 upper end contacts of casing, and banding venthole 201 is seted up to 2 upper ends of casing, and baffle 14 sets up in venthole 201 below, and both ends interference articulates in 2 upper ends of casing, and the upper end is outstanding to be set up the handle, the handle is used for manual adjustment baffle 14 inclination. The handle can partially cover the air outlet holes 201 by rotating the inclined angle of the baffle plate 14, thereby controlling the air outlet rate of the arc extinguish chamber. After the arc is elongated and broken at the arc extinguishing grid 3, a part of small arc flies out from the air inlet hole 121, at this time, the wire mesh 11 plays a role of intercepting the flying of the arc for the first time, the insulation partition 13 gathers the arc at the wire mesh 11, finally, the gas flows out from the air outlet hole 201, and the arc is blocked at the wire mesh 11. The baffle plate 20 is arranged between the baffle plate 14 and the insulating partition plate 13, is positioned below the baffle plate 14, and vertically penetrates through a plurality of intercepting holes, the intercepting holes are round holes, and the projecting positions of the intercepting holes in the vertical direction do not cover the air inlet holes 121 and the air outlet holes 201, so that electric arcs cannot directly fly out of the air inlet holes 121 and the air outlet holes 201, even if the electric arcs fly out of the wire netting 11, the electric arcs can be intercepted by the baffle plate 20, air flow in the shell 2 can normally flow out of the air outlet holes 201, secondary electric arc interception is achieved, and finally, an effect of zero arc flashover is achieved.
A linkage device is arranged between the moving contact 6 and the arc extinguish chamber, the linkage device comprises a cam, a linkage rod 15 and a telescopic rod 16, and the cam comprises a convex part A17, a convex part B18 and a rotating part 19. The projection a17 and the projection B18 are formed to be symmetrical with respect to the center of the rotary unit 19, and the projection a17 and the projection B18 are integrally rotated in synchronization with the rotary unit 19. One end of the telescopic rod 16 is fixedly connected with the moving contact 6, the other end of the telescopic rod is hinged with the protruding portion A17, the rotating portion 19 is hinged to the shell 2, the lower end of the linkage rod 15 is hinged to the protruding portion B18, the middle of the linkage rod is hinged to one side, away from the rotating shaft 10, of the bottom air plate 8, the upper end of the linkage rod 15 is hinged to the upper end of the baffle 14, the protruding portion A17 and the protruding portion B18 enable the linkage rod 15 and the telescopic rod 16 to rotate in opposite directions, and the linkage device is arranged on the inner side of the shell 2. The handle can also cooperate with a linkage for manually correcting cam dead center positions. When the moving contact 6 and the static contact 5 are disconnected suddenly, the moving contact rotates leftwards and drives the telescopic rod 16 to move leftwards, the telescopic rod 16 drives the protruding part A17 to rotate, the protruding part A17 drives the rotating part 19 to rotate, so that the protruding part B18 rotates rightwards, the linkage rod 15 rotates rightwards along with the protruding part B18, the bottom air plate 8 is driven in the middle of the linkage rod 15, the upper end drives the baffle 14, the bottom air plate 8 moves upwards, airflow generated by the bottom air plate 8 can directly aim at electric arcs, the baffle 14 is completely opened, gas can flow out of the air outlet 201 quickly, and the arc extinguishing effect is improved.
The working principle is as follows:
1. when the contactor cuts off small current, the elastic piece 9 is stretched normally, the bottom gas plate 8 does not generate gas, and the gas directly enters the arc extinguish chamber; the first magnetic blowing mechanism and the second magnetic blowing mechanism are used for extinguishing arc of low-current electric arc, the electromagnetic coils with opposite magnetic potentials generate magnetic fields in the same direction according to the current intensity, the magnetizer 4 enables the middle of the magnetic field at the gap space between the arc-extinguishing grid piece 3 and the contact to be weaker and the two sides to be stronger, and the electric arc is elongated and guided to the arc-extinguishing grid piece 3 to be extinguished;
2. when the contact breaks large current, the temperature in the arc extinguish chamber rises, gas generating materials generate a large amount of gas under high temperature, the two groups of side gas plates 7 generate gas on the side parts of the arc extinguish grid pieces 3, the upper surfaces of the bottom gas plates 8 generate gas from bottom to top, electric arcs are guided from the bottom gas plates 8 to enter the arc extinguish grid pieces 3 by the magnetic field of the electromagnetic coil, the gas generated by the bottom gas plates 8 can help the electric arcs to enter the arc extinguish grid pieces 3, and the gas of the side gas plates 7 enables the electric arcs to stay at the arc extinguish grid pieces 3, so that the large electric arcs are elongated and extinguished;
3. when the moving contact 6 and the static contact 5 are suddenly disconnected, the moving contact rotates leftwards and drives the telescopic rod 16 to move leftwards, the telescopic rod 16 drives the protruding part A17 to rotate, the protruding part A17 drives the rotating part 19 to rotate, so that the protruding part B18 rotates rightwards, the linkage rod 15 rotates rightwards along with the protruding part B18, the middle of the linkage rod 15 drives the bottom air plate 8, the upper end of the linkage rod drives the baffle 14, the bottom air plate 8 moves upwards, airflow generated by the bottom air plate 8 can directly aim at electric arcs, and the baffle 14 is completely opened, so that the air can quickly flow out of the air outlet 201;
4. when a large current is cut off, a part of electric arc flies out from the air inlet hole 121, the wire mesh 11 performs first arc interception, the insulating partition plate 13 collects the electric arc at the wire mesh 11, the electric arc is blocked at the wire mesh 11, the electric arc flies out of the wire mesh 11 and is intercepted by the baffle plate 20, and the air flow in the shell 2 can normally flow out from the air outlet hole 201.
It is noted that, in this document, relational terms such as front, back, up, down, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a contactor of area reinforcing magnetic field direction explosion chamber, includes contactor body (1), casing (2) and explosion chamber, set up a plurality of arc extinguishing bars piece (3) in the explosion chamber, contactor body (1) sets up a plurality of contacts, and the contact can move for separating brake and combined floodgate, and leave the clearance with arc extinguishing bars piece (3), contactor body (1) and explosion chamber set up in casing (2), its characterized in that: contactor body (1) still includes first magnetism and blows mechanism and second magnetism and blows the mechanism, first magnetism blows the mechanism and includes that two sets of symmetries set up magnetizer (4) in casing (2) outside and be located arc extinguishing bars piece both sides, second magnetism blows the mechanism and includes two sets of solenoid, two sets of solenoid are parallelly connected with the contact, and the setting is opposite in the magnetism that contact both sides and production side by side.
2. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 1, wherein: the contactor comprises a fixed contact (5) and a movable contact (6), the movable contact (6) comprises a plurality of spiral contacts (601) and an action part (602), the action part (602) is movably connected to the contactor body (1), the action part (602) extends to form a cantilever and is provided with the spiral contacts (601), and a plurality of cambered surface grooves (501) which are in one-to-one correspondence with the spiral contacts (601) are formed in the connection position of the fixed contact (5) and the movable contact (6).
3. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 2, wherein: the spiral contacts (601) are arranged at equal intervals, the spiral contacts (601) are cones, spiral grooves are formed in the side faces of the spiral contacts, the arc grooves (501) are hemispherical surfaces, the fixed contacts (5) are in point contact with the moving contacts (6), and after any one or more spiral contacts (601) are in contact with the arc grooves (501), the fixed contacts (5) and the moving contacts (6) are communicated.
4. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 3, wherein: the contactor body (1) further comprises a gas generating mechanism, the gas generating mechanism comprises two groups of side gas plates (7) which are perpendicular to the arc extinguishing grid plates (3) and are arranged on two sides of the arc extinguishing grid plates (3) and a group of bottom gas plates (8) which are arranged on the lower ends of the arc extinguishing grid plates (3), and gas generating materials are arranged on the inner surfaces of the side gas plates (7) and the upper surfaces of the bottom gas plates (8).
5. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 4, wherein: the gas generating mechanism further comprises an elastic piece (9) and a rotating shaft (10), two ends of the rotating shaft (10) are hinged to the shell (2), one end of the bottom gas plate (8) penetrates through the rotating shaft (10), and the other end of the bottom gas plate is arranged at the lower end of the arc extinguishing grid piece (3) in a suspended mode; elastic component (9) one end is fixed on casing (2), and is located the upside of axis of rotation (10), and the upside of axis of rotation (10) one end is kept away from in end gas board (8) is fixed to the other end, elastic component (9) are heated and can expand and extrude end gas board (8), make end gas board (8) rotate downwards along axis of rotation (10).
6. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 4, wherein: the arc extinguishing grid sheet (3) is sheet-shaped, a herringbone concave edge is formed from the bottom to the top, a plurality of supporting blocks (301) protrude from two sides of the arc extinguishing grid sheet, and the side air plate (7) is provided with mounting grooves matched with the supporting blocks (301); gas generating materials are coated in the area of the side gas plate (7) between the supporting blocks (301) of the two adjacent arc-extinguishing grid pieces (3), and the contact part of the side gas plate (7) and the arc-extinguishing grid pieces (3) is a non-gas generating material area.
7. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 5, wherein: the arc extinguish chamber further comprises a wire mesh (11), an intermediate plate (12), an insulating partition plate (13) and a baffle (14), wherein the intermediate plate (12) is arranged at the upper end of each arc extinguish grid sheet (3), a plurality of air inlet holes (121) are vertically arranged between every two arc extinguish grid sheets (3) of the intermediate plate (12), a plurality of side holes (122) are transversely arranged on the intermediate plate at equal intervals, and the side holes (122) are communicated with the air inlet holes (121); the iron wire net (11) is arranged at the upper end of the middle plate (12) and is formed by combining a plurality of metal wires which are alternately connected in a longitudinal and transverse mode; the insulating partition plate (13) is annular and is arranged at the upper end of the wire mesh (11), and the insulating partition plate (13) is in contact with the upper end of the shell (2); a plurality of air outlet holes (201) are formed in the upper end of the shell (2), the baffle (14) is arranged below the air outlet holes (201), two ends of the baffle are hinged to the upper end of the shell (2) in an interference mode and can transversely rotate relative to the shell (2), a handle is arranged on the upper end of the baffle (14) in a protruding mode and used for manually adjusting the inclination angle of the baffle (14).
8. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 7, wherein: a linkage device is arranged between the moving contact (6) and the arc extinguish chamber, the linkage device comprises a cam, a linkage rod (15) and a telescopic rod (16), the cam comprises a convex part A (17), a convex part B (18) and a rotating part (19), and the convex part A (17) and the convex part B (18) are convex on the rotating part (19) and are in central symmetry; one end of the telescopic rod (16) is fixedly connected with the moving contact (6), the other end of the telescopic rod is hinged with the protruding part A (17), the rotating part (19) is hinged on the shell (2), the lower end of the linkage rod (16) is hinged on the protruding part B (18), the middle of the linkage rod is hinged with one side, away from the rotating shaft (10), of the bottom air plate (8), the upper end of the linkage rod (16) is hinged with the upper end of the baffle (14), and the protruding part A (17) and the protruding part B (18) can enable the linkage rod (15) and the telescopic rod (16) to rotate in opposite directions; the linkage device is arranged on the inner side of the shell (2).
9. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 7, wherein: the arc extinguish chamber further comprises a blocking plate (20), the blocking plate (20) is arranged between the baffle (14) and the insulating partition plate (13), is located below the baffle (14), vertically penetrates through a plurality of intercepting holes, and the projecting positions of the intercepting holes in the vertical direction do not cover the air inlet holes (121) and the air outlet holes (201).
10. The contactor with the enhanced magnetic field guiding arc extinguishing chamber according to claim 1, wherein: magnetizer (4) are the slice, and the wide one end of one end is narrow, fixes in casing (2) outside, and covers arc extinguishing bars piece (3) and the clearance department of contact, casing (2) outside indent forms the slot that matches with magnetizer (4) appearance, magnetizer (4) follow wide end and insert the slot, and magnetizer (4) flush with casing (2) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210015607.1A CN114360966B (en) | 2022-01-07 | 2022-01-07 | Contactor with enhanced magnetic field guiding arc extinguishing chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210015607.1A CN114360966B (en) | 2022-01-07 | 2022-01-07 | Contactor with enhanced magnetic field guiding arc extinguishing chamber |
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| CN114360966A true CN114360966A (en) | 2022-04-15 |
| CN114360966B CN114360966B (en) | 2023-10-13 |
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| CN114360966B (en) | 2023-10-13 |
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Effective date of registration: 20230914 Address after: No. 18 Xianxing Road, Xianlin Street, Yuhang District, Hangzhou City, Zhejiang Province, 310000 Applicant after: HANGZHOU MA SHI DI ELECTRICAL APPLIANCE TECHNOLOGY Co.,Ltd. Address before: 215000 No. 246, Meinan Road, Meili Town, Changshu City, Suzhou City, Jiangsu Province Applicant before: Zheng Aidi |
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