CN216528511U - Arc extinguishing system of heavy current direct current traction load switch - Google Patents
Arc extinguishing system of heavy current direct current traction load switch Download PDFInfo
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- CN216528511U CN216528511U CN202123024533.8U CN202123024533U CN216528511U CN 216528511 U CN216528511 U CN 216528511U CN 202123024533 U CN202123024533 U CN 202123024533U CN 216528511 U CN216528511 U CN 216528511U
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- arc extinguishing
- iron core
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010891 electric arc Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses an arc extinguishing system of a heavy current direct current traction load switch, which comprises: the arc-extinguishing chamber is enclosed by a plurality of side walls to form a mounting cavity, and a plurality of through holes are formed in the opposite side wall of the opening side of the mounting cavity at intervals; the transmission mechanism comprises a base, a moving contact, a support rod and a moving pull rod, and the arc-extinguishing cover is fixed on the base through the support rod; arc extinguishing grid sheets are arranged in the through holes to cool the arc cutting; the upper arc striking row is arranged at the top of the mounting cavity; the lower arc striking row is arranged at the bottom of the mounting cavity; the magnetic blow-out mechanism blows out electric arc to one side of the arc extinguishing grid piece, the magnetic blow-out mechanism comprises two magnetic poles, an iron core and a spiral row, the two opposite ends of the iron core are embedded in the two magnetic poles respectively, the spiral row is sleeved on the outer wall of the iron core, and one end of the spiral row is connected with the lower arc striking row. The arc extinguishing system has the characteristics of simple structure, small volume, low cost and reliable arc extinguishing, and has the capability of switching on and off and extinguishing arcs of rated heavy-current switches.
Description
Technical Field
The utility model relates to the technical field of power distribution system protection electricity, in particular to an arc extinguishing system of a high-current direct-current traction load switch.
Background
The isolating switch is an electric appliance which is more used in high-voltage switching electric appliances, plays an isolating role in a circuit, has a simpler working principle and structure, but has high requirements on working reliability due to large usage amount, and has larger influence on the design, establishment and safe operation of a substation and a power plant.
At present, arc extinguishing devices of a direct current system are mostly used on a direct current circuit breaker and a direct current contactor. Due to the requirement of breaking short-circuit current of the direct current circuit breaker, the arc extinguishing system device needs to have strong arc extinguishing capability, so that the arc extinguishing device is complex in structure, large in size and high in cost. Although the direct current contactor does not need to carry out short-circuit on-off current, an arc extinguishing system device can be made as small and simple as possible, but the direct current contactor has small rated current capacity and cannot be used as a large-current on-off device.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide an arc extinguishing system for a high-current dc traction load switch, so as to solve the technical problem that the high-current load switch is not easy to extinguish the arc.
According to one aspect of the utility model, a high-current direct-current traction load switch arc extinguishing system is provided, which comprises:
the arc extinguishing chamber is enclosed by a plurality of side walls to form an installation cavity, and an opening is formed in one side of the installation cavity;
the transmission mechanism comprises a base, a moving contact, a support rod and a moving pull rod, wherein the arc extinguishing chamber is fixed on the base through the support rod, one end of the moving contact is rotatably connected with the base, and the moving pull rod is hinged with the moving contact;
arc extinguishing grid sheets are arranged on one side wall opposite to the opening so as to cool the arc cutting;
the upper arc striking bar is arranged at the top of the mounting cavity, one end of the upper arc striking bar is spaced from the rotating track of the moving contact, and the other end of the upper arc striking bar extends to be connected with the arc extinguishing grid plate;
the lower arc striking bar is arranged at the bottom of the mounting cavity, one end of the lower arc striking bar is positioned on the rotating track of the moving contact, and the other end of the lower arc striking bar extends to be connected with the arc extinguishing grid plate;
the magnetic blow-out mechanism is used for blowing an electric arc to one side of the arc extinguishing grid piece and comprises two magnetic poles, an iron core and a spiral row, the two magnetic poles are respectively arranged on two opposite side walls of the installation cavity, two opposite ends of the iron core are respectively embedded into the two magnetic poles, the spiral row is sleeved on the outer wall of the iron core, and one end of the spiral row is connected with the lower arc striking row;
the movable contact is pulled by the movable pull rod on the opening side to rotate, so that the movable contact can be abutted against the lower arc striking row or approach the upper arc striking row.
According to some embodiments, the upper arc striking row and the lower arc striking row are respectively in a spoon-shaped structure, and one end of each of the upper arc striking row and the lower arc striking row is connected with the arc extinguishing grid piece.
According to some embodiments, one end of the movable contact movably connected with the lower arc striking row is in a prismatic chamfer structure, and the other end of the movable contact is provided with a round hole and is hinged with the base.
According to some embodiments, the arc striking device further comprises a fixed contact connected to the other end of the lower arc striking row and located on a rotation track of the movable contact.
According to some embodiments, the fixed contact is a U-shaped spring mechanism, and the bottom of the fixed contact is fixedly connected to the inner wall of the arc extinguishing chamber.
According to some embodiments, the spiral row is a rectangular spiral structure, the spiral row is made of copper material, one end of the spiral row is connected with the lower arc striking row through the fixed contact, and the other end of the spiral row is connected with a bus.
According to some embodiments, the mounting cavity is provided with a plurality of through holes at intervals on the opposite side wall of the opening side;
the arc extinguishing grid piece comprises a plurality of metal pieces with square structures, each metal piece is correspondingly arranged in each through hole, and one side of each metal piece is of an asymmetric sawtooth structure.
According to some embodiments, the iron core is cylindrical, the surface of the iron core is wrapped by an insulating layer, and two end faces of the iron core are respectively provided with a threaded hole which is connected with the two magnetic poles.
According to some embodiments, the two magnetic poles are fixed on two opposite side walls of the installation cavity in a square structure, and round holes are formed in the magnetic poles and are respectively in threaded connection with threaded holes on two opposite sides of the iron core.
According to some embodiments, the mounting cavity is a square structure.
Compared with the prior art, the utility model has the following beneficial effects:
when the switch is opened, the external equipment drives the movable pull rod to separate the movable contact from the lower arc striking bar, and at the moment, a large amount of magnetic blowing force is generated in a magnetic blowing mechanism consisting of the two magnetic poles, the spiral bar and the iron core to blow the switch-off arc to the side of the arc extinguishing grid piece. And because the upper arc striking row and the lower arc striking row are respectively connected with two voltage levels, the switching-off electric arc blown into the arc extinguishing grid piece is accelerated and stretched, and is continuously cut and cooled under the action of the arc extinguishing grid piece, the electric arc is finally extinguished, and the switching-off task is completed. The arc extinguishing system has the characteristics of simple structure, small volume, low cost and reliable arc extinguishing, and has the capability of switching on and off the rated high-current switch.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an arc extinguishing system of a high-current direct-current traction load switch provided by the utility model.
In the figure: the arc extinguishing chamber 100, the installation cavity 110, the opening 111, the transmission mechanism 200, the base 210, the moving contact 220, the supporting rod 230, the moving pull rod 240, the arc extinguishing grid 300, the upper arc striking row 400, the lower arc striking row 500, the magnetic blow-out mechanism 600, the magnetic pole 610, the iron core 620 and the spiral row 630.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the present invention provides an arc extinguishing system for a high-current dc traction load switch, which has the characteristics of simple structure, small size, low cost, and reliable arc extinguishing, and has the capability of switching on and off a rated high-current switch.
The arc chute 100 is enclosed by a plurality of sidewalls to form a mounting cavity 110, which may be a square structure, and one side of the mounting cavity 110 is provided with an opening 111, and the opposite sidewall of the opening 111 side is provided with a plurality of through holes at intervals. The transmission mechanism 200 includes a base 210, a movable contact 220, a supporting rod 230 and a movable pull rod 240, the arc-extinguishing chamber 100 is fixed on the base 210 through the supporting rod 230, one end of the movable contact 220 is rotatably connected with the base 210, the movable pull rod 240 is hinged with the movable contact 220, and the movable pull rod 240 rotates on the side of the installation cavity 110 where the opening 111 is provided. Arc chute 300 is mounted in the plurality of through holes to cool the arc cutting. The upper striking bar 400 is installed on the top of the installation cavity 110, spaced apart from the moving contact 220, and connected to the arc chute 300. The lower arc ignition row 500 is installed at the bottom of the installation cavity 110 and is located on the rotation track of the movable contact 220.
Wherein, moving contact 220 separates with lower striking row 500 and is formed with the separating brake electric arc in the twinkling of an eye, and magnetism blows mechanism 600 and is used for blowing separating brake electric arc to arc extinguishing bars piece 300 one side, and magnetism blows mechanism 600 and includes two magnetic poles 610, iron core 620 and spiral row 630, and two magnetic poles 610 are located respectively on two relative lateral walls of installation cavity 110, and the relative both ends of iron core 620 are embedded respectively and are installed in two magnetic poles 610, and spiral row 630 overlaps and locates on the iron core 620 outer wall and one end and lower striking row 500 is connected.
In the above scheme, during opening, the external device drives the movable pull rod 240 to separate the movable contact 220 from the lower arc striking bar 500, and at this time, a large amount of magnetic blowing force is generated in the magnetic blowing mechanism 600 composed of the two magnetic poles 610, the spiral bar 630 and the iron core 620 to blow the opening arc to the arc extinguishing grid piece 300 side. And because the upper striking bar 400 and the lower striking bar 500 are respectively connected with two stages of voltage, the opening arc blown into the arc-extinguishing grid 300 is accelerated and stretched, and is continuously cut and cooled under the action of the arc-extinguishing grid 300, and finally the arc is extinguished, thereby completing the opening task. The arc extinguishing system has the characteristics of simple structure, small volume, low cost and reliable arc extinguishing, and has the capability of switching on and off the rated high-current switch.
According to some embodiments, the upper arc striking row 400 and the lower arc striking row 500 are respectively in a spoon-shaped structure, one end of each of the upper arc striking row 400 and the lower arc striking row 500 is connected to the arc extinguishing grid 300, the spiral row 630 and the iron core 620 are surrounded by the lower arc striking row 500 in the spoon-shaped structure, and the outer peripheral wall of the spiral row 630 and the lower arc striking row 500 in the spoon-shaped structure are in a spaced state, and the upper arc striking row 400 and the lower arc striking row 500 are respectively set to be in the spoon-shaped structure, so that the electric field force is effectively improved, and the magnetic field force is reduced by avoiding short circuit between the spiral row 630 and the lower arc striking row 500.
One end of the movable contact 220 movably connected with the lower arc striking row 500 is in a prismatic chamfer structure, and the other end of the movable contact is provided with a round hole and is hinged with the base 210. The hinge joint may be embodied as a mounting hole formed at the top of the base 210, and the mounting hole is connected with the circular hole through a pin.
The arc extinguishing system further comprises a fixed contact, the fixed contact is connected with the other end of the lower arc striking row 500 and is located on a rotating track of the movable contact 220, the fixed contact is a U-shaped spring mechanism, the bottom of the fixed contact is fixedly connected with the inner wall of the arc extinguishing cover 100, and the fixed connection mode can be that a screw is connected through a bolt thread or welding.
The spiral row 630 is a rectangular spiral structure, the spiral row 630 is made of copper material, one end of the spiral row 630 is connected with the lower arc striking row 500 through a fixed contact, the other end of the spiral row 630 is connected with a bus, the spiral row 630 can be understood as a spiral coil, the bus can be understood as an electrified power supply, and the spiral row 630 is electrified through the bus, so that a large amount of magnetic blowing force is generated due to interaction between the magnetic blowing mechanism and the opening arc at the moment that the movable contact 220 is separated from the fixed contact.
The arc chute 300 includes a plurality of metal sheets with a square structure, one side of each metal sheet is in an asymmetric zigzag structure, wherein the metal sheets can be made of copper alloy, iron alloy and other metals. When the moving contact 220 is separated from the static contact, the arc generated between the contacts is absorbed into the arc-extinguishing grid 300, the arc-extinguishing grid 300 divides the arc into a plurality of small segments in the motion, and a cathode is formed on each small grid (called near-pole effect), so that the accumulation of the voltage drops of the plurality of segments increases the total arc voltage drop to be insufficient to maintain the power voltage for combustion, thereby achieving the purpose of arc extinguishing.
The iron core 620 is in a column shape, the surface of the iron core is wrapped by an insulating layer, the two end faces are respectively provided with a threaded hole and connected with the two magnetic poles 610, wherein the insulating layer can be made of insulating materials and coated on the surface of the iron core 620, and the surface of the iron core 620 can also be sleeved with the insulating layer.
The two magnetic poles 610 are fixed on two opposite side walls of the installation cavity 110 in a square structure, and circular holes are formed in the magnetic poles 610 and are respectively in threaded connection with threaded holes at two opposite ends of the iron core 620. The two magnetic poles 610 and the iron core 620 can be connected in an embedded mode, and the wall surfaces of the two magnetic poles 610 are provided with mounting grooves, so that the two opposite ends of the iron core 620 are respectively embedded into the two magnetic poles 610 to be fixed.
Therefore, when the arc extinguishing system is in a breaking state, the external equipment drives the movable pull rod 240 to separate the movable contact 220 from the lower arc striking bar 500, and at the moment, a large amount of magnetic blowing force is generated in the magnetic blowing mechanism 600 consisting of the two magnetic poles 610, the spiral bar 630 and the iron core 620 to blow the breaking arc to the arc extinguishing grid piece 300 side. And because the upper striking bar 400 and the lower striking bar 500 are respectively connected with two stages of voltage, the opening arc blown into the arc-extinguishing grid 300 is accelerated and stretched, and is continuously cut and cooled under the action of the arc-extinguishing grid 300, and finally the arc is extinguished, thereby completing the opening task. The arc extinguishing system has the characteristics of simple structure, small volume, low cost and reliable arc extinguishing, and has the capability of switching on and off the rated high-current switch.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Claims (10)
1. The utility model provides a heavy current direct current draws load switch arc extinguishing system which characterized in that includes:
the arc extinguishing chamber is enclosed by a plurality of side walls to form an installation cavity, and an opening is formed in one side of the installation cavity;
the transmission mechanism comprises a base, a moving contact, a support rod and a moving pull rod, wherein the arc extinguishing chamber is fixed on the base through the support rod, one end of the moving contact is rotatably connected with the base, and the moving pull rod is hinged with the moving contact;
arc extinguishing grid sheets are arranged on one side wall opposite to the opening so as to cool the arc cutting;
the upper arc striking bar is arranged at the top of the mounting cavity, one end of the upper arc striking bar is spaced from the rotating track of the moving contact, and the other end of the upper arc striking bar extends to be connected with the arc extinguishing grid plate;
the lower arc striking bar is arranged at the bottom of the mounting cavity, one end of the lower arc striking bar is positioned on the rotating track of the moving contact, and the other end of the lower arc striking bar extends to be connected with the arc extinguishing grid plate;
the magnetic blow-out mechanism is used for blowing an electric arc to one side of the arc extinguishing grid piece and comprises two magnetic poles, an iron core and a spiral row, the two magnetic poles are respectively arranged on two opposite side walls of the installation cavity, two opposite ends of the iron core are respectively embedded into the two magnetic poles, the spiral row is sleeved on the outer wall of the iron core, and one end of the spiral row is connected with the lower arc striking row;
the movable contact is pulled by the movable pull rod on the opening side to rotate, so that the movable contact can be abutted against the lower arc striking row to form a closing state or approach the upper arc striking row to form an opening state.
2. A high current DC traction load switch arc extinguishing system according to claim 1,
the upper arc striking row and the lower arc striking row are respectively of a spoon-shaped structure, and one ends of the upper arc striking row and the lower arc striking row are connected with the arc extinguishing grid plate.
3. A high current DC traction load switch arc extinguishing system according to claim 1,
one end of the moving contact movably connected with the lower arc striking row is of a prismatic chamfer structure, and the other end of the moving contact is provided with a round hole and is hinged with the base.
4. A high current DC traction load switch arc extinguishing system according to claim 3,
the lower arc striking device is characterized by also comprising a static contact which is connected with the other end of the lower arc striking row and is positioned on the rotating track of the dynamic contact.
5. A high current DC traction load switch arc extinguishing system according to claim 4,
the static contact is a U-shaped spring mechanism, and the bottom of the static contact is fixedly connected with the inner wall of the arc extinguishing cover.
6. A high current DC traction load switch arc extinguishing system according to claim 5,
the spiral row is of a rectangular spiral structure and made of copper materials, one end of the spiral row is connected with the lower arc striking row through the fixed contact, and the other end of the spiral row is connected with a bus.
7. A high current DC traction load switch arc extinguishing system according to claim 6,
a plurality of through holes are formed in the opposite side wall of the opening side of the mounting cavity at intervals;
the arc extinguishing grid piece comprises a plurality of metal pieces with square structures, each metal piece is correspondingly arranged in each through hole, and one side of each metal piece is of an asymmetric sawtooth structure.
8. A high current DC traction load switch arc extinguishing system according to claim 7,
the iron core is columnar, the surface of the iron core is wrapped by an insulating layer, and two end faces of the iron core are respectively provided with a threaded hole and connected with the two magnetic poles.
9. A high current DC traction load switch arc extinguishing system according to claim 8,
the two magnetic poles are fixed on two opposite side walls of the mounting cavity in a square structure, and are provided with round holes which are respectively in threaded connection with threaded holes on two opposite sides of the iron core.
10. A high current DC traction load switch arc extinguishing system according to claim 1,
the mounting cavity is of a square structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123024533.8U CN216528511U (en) | 2021-12-02 | 2021-12-02 | Arc extinguishing system of heavy current direct current traction load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123024533.8U CN216528511U (en) | 2021-12-02 | 2021-12-02 | Arc extinguishing system of heavy current direct current traction load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216528511U true CN216528511U (en) | 2022-05-13 |
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ID=81465330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123024533.8U Active CN216528511U (en) | 2021-12-02 | 2021-12-02 | Arc extinguishing system of heavy current direct current traction load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216528511U (en) |
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2021
- 2021-12-02 CN CN202123024533.8U patent/CN216528511U/en active Active
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