CN209929255U - Magnetic blow-out arc-extinguishing breaker structure - Google Patents

Magnetic blow-out arc-extinguishing breaker structure Download PDF

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Publication number
CN209929255U
CN209929255U CN201921187471.2U CN201921187471U CN209929255U CN 209929255 U CN209929255 U CN 209929255U CN 201921187471 U CN201921187471 U CN 201921187471U CN 209929255 U CN209929255 U CN 209929255U
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CN
China
Prior art keywords
arc
arc extinguishing
rod
magnetic blow
moving contact
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201921187471.2U
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Chinese (zh)
Inventor
吕春明
齐少拴
李佳敏
李凯
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Northeast Petroleum University
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Northeast Petroleum University
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Priority to CN201921187471.2U priority Critical patent/CN209929255U/en
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Publication of CN209929255U publication Critical patent/CN209929255U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a magnetic blow-out arc breaker structure, which comprises a shell, a supporting frame is fixedly connected inside the shell, an arc extinguishing device is arranged on the supporting frame, a static contact and a moving contact are arranged below the arc extinguishing device, a V-shaped connecting rod is arranged between the moving contact and a leading-out terminal, the moving contact slides inside the shell through the V-shaped connecting rod and is movably connected with the static contact, a switching mechanism is arranged on the supporting frame, the switching mechanism drives the V-shaped connecting rod to slide, a magnetic blow iron core is fixedly connected below the static contact and the moving contact, a magnetic blow coil is spirally wound on the magnetic blow iron core, the electric arc moves upwards under the action of magnetic field force and enters, because arc control device is swung back and forth, electric arc can get into the inside of more explosion chambers, causes a plurality of arc extinguishing grid tray cutting electric arc in turn, has reduced the risk that is ablated and damaged when the arc extinguishing grid tray arc extinguishing then.

Description

Magnetic blow-out arc-extinguishing breaker structure
Technical Field
The utility model relates to an electrical equipment technical field specifically is a magnetic blowout circuit breaker structure.
Background
The circuit breaker has the primary task of extinguishing electric arcs, because a direct-current circuit has no natural zero crossing point, the electric arcs are mostly extinguished by adopting a method for increasing the electric arc voltage in the current medium-low voltage direct-current system, the electric arcs are extinguished by adopting a metal grid piece to cut the electric arcs in a common scheme, the common position of the existing metal grid piece is fixed, when the electric arcs are cut, the moving tracks of a moving contact and a static contact are consistent when the electric arcs are separated and powered off at each time, so that the tracks of the electric arcs entering an arc extinguish chamber at each time are the same, the positions of the grid pieces for cutting the electric arcs are the same as those of the grid pieces for cutting the electric arcs, so that part of the grid pieces are seriously ablated or; in order to increase the magnetic blow-out strength and enable electric arcs to enter an arc extinguish chamber quickly, a magnetic blow-out circuit breaker structure is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a magnetic blowout circuit breaker structure to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a magnetic blow-out arc-extinguishing breaker structure, includes the casing, the inside fixedly connected with support frame of casing, be equipped with arc control device on the support frame, arc control device includes a plurality of arc extinguishing grid tray, is equipped with the explosion chamber between two adjacent arc extinguishing grid tray, arc control device's below is equipped with static contact and moving contact, static contact and moving contact are connected with incoming line terminal and leading-out terminal respectively, be equipped with V type connecting rod between moving contact and the leading-out terminal, the moving contact pass through V type connecting rod inside slip and with static contact swing joint at the casing, be equipped with switching mechanism on the support frame, switching mechanism drive V type connecting rod slides, the below fixedly connected with magnetic blow-out iron core of static contact and moving contact, spiral winding has the magnetic blow-out coil on the magnetic blow-out iron core.
Preferably, the V-shaped connecting rod includes two supporting rods, the two supporting rods are connected in a manner of rotating with each other, and the lower ends of the two supporting rods are respectively connected with the moving contact and the outlet terminal in a rotating manner.
Preferably, the switch mechanism comprises a handle, the handle is slidably connected to the support frame, the upper end of the handle penetrates through the side wall of the shell and extends to the outside, the two sides of the lower end of the handle are fixedly connected with shifting blocks, trapezoidal grooves are formed on the shifting blocks, a rotating shaft is arranged between the two shifting blocks, and two ends of the rotating shaft are connected inside the trapezoidal groove in a sliding way, the rotating shaft is rotatably sleeved at the upper end of the V-shaped connecting rod, a sliding groove is arranged inside the supporting frame, a sliding rod is connected inside the sliding groove in a sliding manner, the right end of the sliding rod is rotationally connected to the side wall of the arc extinguishing device through a torsional spring, the left end of the slide bar is fixedly connected with a stop block, the lower end of the stop block is connected on the lower side slope of the slide groove in a sliding manner, the upper end and the ejector pad swing joint of dog, the ejector pad also rotates through the torsional spring to be connected on the lateral wall of handle, arc control device passes through vibrator sliding connection on the support frame.
Preferably, the fixed contact and the movable contact are provided with arc striking angles.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a slide the handle leftwards, make the handle drive the ejector pad and dial the piece and slide leftwards together, at this moment the ejector pad drives the dog and slides leftwards first, then make the arc control device break the balance of vibrator and slide leftwards, when the dog slides to the slope low point of spout, the ejector pad breaks away from the connection with the dog and causes the arc control device to lose the pulling force leftwards, then the arc control device swings back and forth through vibrator, the handle continues to slide leftwards, the pivot just in time just in contact with the right side wall of dovetail groove, then dial the piece and drive the pivot and slide leftwards, make V type connecting rod slide leftwards like this, at this moment moving contact and static contact separation produce electric arc, electric arc produces between moving contact and static contact, electric arc produced under the effect of magnetic field moves upwards along the angle of approach and gets into the arc extinguishing chamber, because the arc, the arc-extinguishing grid plates are caused to cut the arc alternately, and then the risk of ablation damage during arc extinction of the arc-extinguishing grid plates is reduced; and the magnetic blow iron core and the magnetic blow coil are positioned right below the moving contact and the static contact and are closer to the region where the electric arc is generated, so that the magnetic blow strength is increased, and the electric arc can conveniently and quickly enter the arc extinguish chamber.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of the arc extinguishing device, the static contact, the moving contact and the magnetic blow-out coil of the present invention;
fig. 3 is an overall sectional view of the present invention;
fig. 4 is an enlarged view of fig. 3 a according to the present invention;
fig. 5 is a schematic structural view of the arc extinguishing device, the static contact and the moving contact of the present invention;
fig. 6 is an enlarged view of the position B of fig. 5 according to the present invention;
fig. 7 is a cross-sectional view of the support frame, the toggle block and the arc extinguishing device of the present invention;
fig. 8 is an enlarged view of fig. 7 at C;
fig. 9 is a schematic structural view of the sliding groove, the stop block and the push block of the present invention.
In the figure: 1. the magnetic blow-out type arc extinguishing device comprises a shell, 2, a support frame, 3, an arc extinguishing device, 301, an arc extinguishing grid plate, 302, an arc extinguishing chamber, 4, a static contact, 5, a moving contact, 6, a V-shaped connecting rod, 601, a supporting rod, 7, a magnetic blow-out iron core, 8, a magnetic blow-out coil, 9, a switch mechanism, 901, a handle, 902, a toggle block, 903, a trapezoidal groove, 904, a rotating shaft, 10, an arc striking angle, 11, a sliding groove, 12, a sliding rod, 13, a stop block, 14, a push block, 15, a torsion spring, 16 and a vibration.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: a magnetic quenching circuit breaker structure comprises a shell 1, wherein a support frame 2 is fixedly connected inside the shell 1, the shell 1 and the support frame 2 are both made of insulating plastic materials, and then the phenomenon of electric shock caused by a user in use is prevented, an arc extinguishing device 3 is arranged on the support frame 2, the arc extinguishing device 3 has the function of cutting off and extinguishing electric arc generated inside the device, the arc extinguishing device 3 comprises a plurality of arc extinguishing grids 301, an arc extinguishing chamber 302 is arranged between every two adjacent arc extinguishing grids 301, the arc extinguishing grids 301 are arranged in an even state, so that the size of each arc extinguishing chamber 302 is the same, the arc extinguishing grids 301 are made of metal grids, for example, the arc extinguishing grids 301 are made of steel, the ferromagnetic characteristic of steel helps to attract the electric arc and enable the electric arc to stay inside the arc extinguishing chambers 302, and the arc extinguishing grids 301 are used for dividing the electric arc into a plurality of short arcs burning between the arc extinguishing, a fixed contact 4 and a movable contact 5 are arranged below the arc extinguishing device 3, a guide block is fixedly connected to the lower side wall of the movable contact 5 and is connected in a guide groove in a sliding manner, the guide groove is formed in the side wall of the shell 1, so that the sliding operation track of the movable contact 5 is limited, the fixed contact 4 and the movable contact 5 are respectively connected with an incoming line terminal and an outgoing line terminal, when the fixed contact 4 and the movable contact 5 are disconnected, the incoming line terminal is still electrified, the outgoing line terminal is free of electricity, the incoming line terminal and the outgoing line terminal are both connected with external leads and are connected in series on a closed loop of an electricity utilization circuit, the incoming line terminal and the outgoing line terminal are both fixed on the side wall of the shell 1 by screws, so that the incoming line terminal and the outgoing line terminal cannot move in the shell 1, a V-shaped connecting rod 6 is arranged between the movable contact 5 and the outgoing line terminal, the movable contact 5 slides in the shell, after the static contact 4 is connected with the moving contact 5, the incoming line terminal and the outgoing line terminal are connected in series to keep current flowing, when the static contact 4 is separated from the moving contact 5, the incoming line terminal and the outgoing line terminal are disconnected, so that the current is blocked, the support frame 2 is provided with a switch mechanism 9, the switch mechanism 9 drives the V-shaped connecting rod 6 to slide, a magnetic blow iron core 7 is fixedly connected below the static contact 4 and the moving contact 5, a magnetic blow coil 8 is spirally wound on the magnetic blow iron core 7, the magnetic blow iron core 7 is fixed in the center of the magnetic blow coil 8, the arc blowing force of a magnetic field is increased, the magnetic blow coil 8 and the static contact 4 are connected in series, the current of the magnetic blow coil 8 is the arc current, a strong magnetic field is generated between the static contact 4 and the movable contact 5 after the current of the magnetic blow coil 8 flows, and the arc moves under stress in the magnetic field, so that the arc leaves the contact quickly and enters the interior of the arc extinguishing device 3 to force the arc to be extinguished.
Specifically, the V-shaped link 6 includes two struts 601, the two struts 601 are made of an electrified conductor material, the connection portions of the two struts 601 are connected in a mutually rotating manner, the lower ends of the two struts 601 are respectively rotatably connected with the movable contact 5 and the outlet terminal, the side walls of the rotational connection portions of the two struts 601 are tightly attached, and the side walls of the two struts 601 generate friction during rotation, so that the two struts cannot rotate by themselves in a state without external force, thereby preventing the occurrence of a false disconnection phenomenon.
Specifically, the switch mechanism 9 includes a handle 901, the handle 901 is slidably connected to the support frame 2, the upper end of the handle 901 penetrates through the side wall of the housing 1 and extends to the outside, the handle 901 is made of an insulating plastic material to prevent a user from getting an electric shock when using the switch mechanism, the sliding handle 901 can slide the movable contact 5 to further realize the separation and connection of the movable contact 5 and the stationary contact 4, two sides of the lower end of the handle 901 are fixedly connected with a toggle block 902, a trapezoidal groove 903 is formed on the toggle block 902, a rotating shaft 904 is arranged between the two toggle blocks 902, two ends of the rotating shaft 904 are slidably connected inside the trapezoidal groove 903, the rotating shaft 904 is rotatably sleeved on the upper end of the V-shaped link 6, as shown in fig. 4, when the movable contact 5 contacts the stationary contact 4, the rotating shaft 904 is connected with the left side wall of the trapezoidal groove 903, and when the movable contact 5 is separated from, at this time, the toggle block 902 slides leftward along with the handle 901, so the trapezoidal groove 903 moves leftward to cause the rotating shaft 904 to slide relatively in the trapezoidal groove 903 and slowly approach the right side wall of the trapezoidal groove 903, and between these two walls, the rotating shaft 904 is stationary and does not move in the interior of the housing 1, when the right side wall of the trapezoidal groove 903 contacts with the rotating shaft 904, the right side wall of the trapezoidal groove 903 moves leftward against the rotating shaft 904, and then the rotating shaft 904 carries the upper end of the V-shaped link 6 to move leftward (at this time, the rotating shaft 904 slides upward on the right side wall of the trapezoidal groove 903), so that the V-shaped link 6 causes the moving contact 5 to slide leftward and then separate from the stationary contact 4, when the handle 901 slides rightward, as shown in fig. 7, the upper side wall of the trapezoidal groove 903 has a certain slope, so the upper side wall of the 903 presses the rotating shaft 904 to slide downward, and then the included angle of the V-shaped link 6 becomes, then the movable contact 5 is connected with the fixed contact 4, at this time, the device is in a power-on state, a chute 11 is formed in the support frame 2, a slide bar 12 is slidably connected in the chute 11, the right end of the slide bar 12 is rotatably connected to the side wall of the arc extinguishing device 3 through a torsion spring 15, a stopper 13 is fixedly connected to the left end of the slide bar 12, the torsion spring 15 on the slide bar 12 generates a certain torsion force to the slide bar 12 to urge the left end of the slide bar 12 to press the stopper 13, so that the stopper 13 is attached to the lower side wall of the chute 11, the lower end of the stopper 13 is slidably connected to the lower side slope of the chute 11, the upper end of the stopper 13 is movably connected with a push block 14, the push block 14 is also rotatably connected to the side wall of the handle 901 through the torsion spring 15, the arc extinguishing device 3 is slidably connected to the support frame 2 through a, two ends of the guide rod are fixed on the support frame 2, the middle block is fixed on the side wall of the arc extinguishing device 3 and slides on the guide rod, two sides of the middle block are provided with springs, when the middle block is stressed to slide along the guide rod, the spring in the direction is compressed, and after the force on the middle block is lost, the spring is reset to cause the middle block to swing back and forth, so that the arc extinguishing device swings back and forth, when the handle 901 slides leftwards, the push block 14 pushes the stop block 13 to slide leftwards, then the stop block 13 drives the sliding rod 12 and the arc extinguishing device 3 to move leftwards, at this time, the stop block 13 slides obliquely along the lower side of the sliding groove 11, so that the stop block 13 slides leftwards, the more the stop block 13 slides downwards and the less the connection with the push block 14 is, finally the stop block 13 is separated from the push block 14, at this time, the arc extinguishing device 3 is rebounded rightwards by the vibrating device 16 instantly after losing the pulling force leftwards, and then the arc extinguishing device 3 swings back and forth through the vibrating device 16; when the handle 901 is slid rightward, as shown in fig. 9, the pushing block 14 rotates when the pushing block 14 contacts the stopper 13, and the handle 901 continues to be slid, so that the pushing block 14 is returned to the state shown in fig. 6 by the urging force of the torsion spring 15.
Specifically, the fixed contact 4 and the movable contact 5 are provided with the arc striking angle 10, and when the movable contact 5 is separated from the fixed contact 4, the arc generated between the movable contact 5 and the fixed contact 4 moves upwards along the arc striking angle 10, so that the arc is facilitated to rapidly enter the arc extinguishing device 3.
The working principle is as follows: when the circuit is disconnected, the handle 901 is slid leftwards, the handle 901 simultaneously drives the push block 14 and the toggle block 902 to slide leftwards, the rotating shaft 904 is positioned at the left end of the trapezoidal groove 903, therefore, the handle 901 is not stressed when sliding leftwards, at the moment, the push block 14 firstly drives the stop block 13 to slide leftwards, then the arc extinguishing device 3 breaks the balance of the vibrating device 16 and slides leftwards, when the stop block 13 slides to the lower part of the slope of the chute 11, the push block 14 is separated from the stop block 13, the arc extinguishing device 3 loses the left pulling force and then rebounds rightwards instantly, the arc extinguishing device 3 is further driven to swing back and forth through the vibrating device 16, at the moment, the rotating shaft 904 just contacts with the right side wall of the trapezoidal groove 903, the handle 901 continuously slides leftwards, then the toggle block 902 drives the rotating shaft 904 to slide leftwards, so that the V-shaped connecting rod 6 slides leftwards, after the included angle of the two supporting, the moving contact 5 and the static contact 4 are separated to generate electric arcs, the electric arcs are generated between the moving contact 5 and the static contact 4, the electric arcs move upwards along the arc striking angle 10 under the action of magnetic field force and enter the arc extinguishing chamber 302, and the arc extinguishing device 3 swings back and forth, so that the arc extinguishing grid plates 301 cut the electric arcs alternately, and the risk of ablation of the arc extinguishing grid plates 301 is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides a magnetic blowout circuit breaker structure, includes casing (1), its characterized in that: the arc extinguishing device is characterized in that a support frame (2) is fixedly connected to the inside of the shell (1), an arc extinguishing device (3) is arranged on the support frame (2), the arc extinguishing device (3) comprises a plurality of arc extinguishing grid plates (301), an arc extinguishing chamber (302) is arranged between every two adjacent arc extinguishing grid plates (301), a static contact (4) and a moving contact (5) are arranged below the arc extinguishing device (3), the static contact (4) and the moving contact (5) are respectively connected with an incoming line terminal and an outgoing line terminal, a V-shaped connecting rod (6) is arranged between the moving contact (5) and the outgoing line terminal, the moving contact (5) slides in the shell (1) through the V-shaped connecting rod (6) and is movably connected with the static contact (4), a switch mechanism (9) is arranged on the support frame (2), the switch mechanism (9) drives the V-shaped connecting rod (6) to slide, and a magnetic blowing iron core (7, and a magnetic blow coil (8) is spirally wound on the magnetic blow iron core (7), and the magnetic blow coil (8) and the static contact (4) are mutually connected in series.
2. The magnetic blow-out breaker structure of claim 1, wherein: the V-shaped connecting rod (6) comprises two supporting rods (601), the connecting positions of the two supporting rods (601) are connected in a mutually rotating mode, and the lower ends of the two supporting rods (601) are respectively connected with the moving contact (5) and the wire outlet terminal in a rotating mode.
3. The magnetic blow-out breaker structure of claim 1, wherein: the switching mechanism (9) comprises a handle (901), the handle (901) is connected to the support frame (2) in a sliding manner, the upper end of the handle (901) penetrates through the side wall of the shell (1) and extends to the outside, two sides of the lower end of the handle (901) are fixedly connected with toggle blocks (902), a trapezoidal groove (903) is formed in each toggle block (902), a rotating shaft (904) is arranged between the two toggle blocks (902), two ends of each rotating shaft (904) are connected to the inside of the trapezoidal groove (903) in a sliding manner, each rotating shaft (904) is rotatably sleeved at the upper end of a V-shaped connecting rod (6), a sliding groove (11) is formed in the support frame (2), a sliding rod (12) is connected to the inside of each sliding groove (11) in a sliding manner, the right end of each sliding rod (12) is rotatably connected to the side wall of the arc extinguishing device (3) through a torsion spring (15), and a stop block (13, the lower extreme sliding connection of dog (13) is on the downside slope of spout (11), the upper end and ejector pad (14) swing joint of dog (13), ejector pad (14) also rotate through torsional spring (15) and connect on the lateral wall of handle (901), arc control device (3) are through vibrator (16) sliding connection on support frame (2).
4. The magnetic blow-out breaker structure of claim 1, wherein: and arc striking angles (10) are arranged on the static contact (4) and the moving contact (5).
CN201921187471.2U 2019-07-26 2019-07-26 Magnetic blow-out arc-extinguishing breaker structure Expired - Fee Related CN209929255U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921187471.2U CN209929255U (en) 2019-07-26 2019-07-26 Magnetic blow-out arc-extinguishing breaker structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921187471.2U CN209929255U (en) 2019-07-26 2019-07-26 Magnetic blow-out arc-extinguishing breaker structure

Publications (1)

Publication Number Publication Date
CN209929255U true CN209929255U (en) 2020-01-10

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Application Number Title Priority Date Filing Date
CN201921187471.2U Expired - Fee Related CN209929255U (en) 2019-07-26 2019-07-26 Magnetic blow-out arc-extinguishing breaker structure

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111477522A (en) * 2020-06-23 2020-07-31 南京大策文化传播有限公司 Arc extinguishing device of circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111477522A (en) * 2020-06-23 2020-07-31 南京大策文化传播有限公司 Arc extinguishing device of circuit breaker
CN111477522B (en) * 2020-06-23 2020-11-13 深圳微羽智能科技有限公司 Arc extinguishing device of circuit breaker

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