CN112382533A - Non-polar high-voltage direct-current contactor - Google Patents
Non-polar high-voltage direct-current contactor Download PDFInfo
- Publication number
- CN112382533A CN112382533A CN202011040725.5A CN202011040725A CN112382533A CN 112382533 A CN112382533 A CN 112382533A CN 202011040725 A CN202011040725 A CN 202011040725A CN 112382533 A CN112382533 A CN 112382533A
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- China
- Prior art keywords
- fixed contact
- magnet
- voltage direct
- current contactor
- push rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Abstract
The invention relates to the technical field of contactors, in particular to a non-polar high-voltage direct-current contactor, which comprises an insulating cover, a yoke iron plate, a bracket, a moving point plate, a moving spring assembly, a first static contact and a second static contact, wherein the yoke iron plate is arranged on the insulating cover; an arc extinguishing chamber is formed between the insulating cover and the yoke plate; the first static contact and the second static contact extend into and are fixed in the arc extinguishing chamber; the bracket is arranged at the bottom of the yoke iron plate; arc extinguishing grids are arranged on the front side and the rear side of the first fixed contact and the front side and the rear side of the second fixed contact in the arc extinguishing chamber; a first magnet is arranged on one side, close to the second fixed contact, of the first fixed contact; and a second magnet is arranged on one side of the second fixed contact close to the first fixed contact. The invention can improve the load cutting-off capability of the product, has no requirement on the load installation polarity of the first static contact and the second static contact, achieves the purpose of no polarity of the real external load, and well solves the practical problem in the application process of the product.
Description
Technical Field
The invention relates to the technical field of contactors, in particular to a non-polar high-voltage direct-current contactor.
Background
A contactor is an electronic control device having a control system (also known as an input loop) and a controlled system (also known as an output loop), typically used in automatic control circuits, which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.
The direct current contactor is one of contactors, and most of the existing direct current contactors adopt a movable spring direct-acting type (also called a solenoid direct-acting type) scheme, and the principle is that the direct current contactor is driven by a coil, electromagnetic force is generated through a magnetic circuit with a certain shape surrounding the periphery, and initial kinetic energy is provided for attraction of product contacts.
The contactor can generate electric arcs in the processes of attraction and breaking, the higher the connected load voltage is, the harder the electric arcs are to break, so that contacts can not be completely separated in time, and the electric arc breaking capacity of the contactor is an important standard for measuring the performance of the contactor.
In the prior art, magnetic quenching is carried out by the principle that a magnetic field generated by a magnet and current of a contact part generate magnetic electric force, and the magnetic quenching has directionality, so that strict requirements are imposed on a positive electrode and a negative electrode connected to a load end of a contactor, and the magnetic quenching is not ideal from the practical point of view.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a non-polar high-voltage direct-current contactor.
The purpose of the invention is realized by the following technical scheme: a non-polar high-voltage direct-current contactor comprises an insulating cover, a yoke iron plate, a bracket, a moving point plate, a moving spring assembly, a first static contact and a second static contact; an arc extinguishing chamber is formed between the insulating cover and the yoke plate; one end of the first static contact and one end of the second static contact extend into and are fixed in the arc extinguishing chamber; the bracket is arranged at the bottom of the yoke iron plate; the movable spring assembly comprises a push rod and a magnetic circuit assembly; the magnetic circuit component is used for driving the push rod to move so that the moving point plate is respectively contacted with the first fixed contact and the second fixed contact; the magnetic circuit assembly is arranged on the bracket;
arc extinguishing grids are arranged on the front side and the rear side of the first fixed contact and the front side and the rear side of the second fixed contact in the arc extinguishing chamber; a first magnet is arranged on one side, close to the second fixed contact, of the first fixed contact; a second magnet is arranged on one side, close to the first fixed contact, of the second fixed contact; the first magnet and the second magnet are fixed on the top of the insulating cover.
The invention is further arranged that the arc chute is provided with a plurality of protrusions; the straight line where the first fixed contact and the second fixed contact are located is parallel to the transverse extending direction of the protrusion.
The invention is further arranged that the direction of the magnetic field between the first magnet and the second magnet is parallel to the straight line where the first static contact and the second static contact are located.
The invention is further provided that the shape of the first magnet and the shape of the second magnet are both square or both arc-shaped.
The invention is further provided that the top of the insulating cover is provided with a containing groove for placing the first magnet and the second magnet.
The invention is further provided that the magnetic circuit component comprises a framework, a magnetic conduction shaft sleeve, a movable iron core and a coil which are all arranged on the bracket; the coil is wound outside the framework; the magnetic conduction shaft is sleeved in the framework; the movable iron core is arranged in the magnetic conduction shaft sleeve; one end of the push rod is connected with the movable iron core; the other end of the push rod is connected with the moving point plate.
The invention is further provided that a counterforce spring is arranged between the movable iron core and the push rod; the push rod is sleeved in the counter-force spring.
The invention is further provided that an overtravel spring is arranged between the moving point plate and the bottom of the insulating cover; the push rod is sleeved in the overtravel spring.
The invention is further provided that clamp springs are arranged between the push rod and the movable iron core and between the push rod and the movable point plate.
The invention is further provided that arc-shaped connecting plates are arranged between the arc-extinguishing grids on the front side and the rear side of the first static contact and between the arc-extinguishing grids on the front side and the rear side of the second static contact.
The invention is further arranged that the arc-extinguishing grids on the front side and the rear side of the first static contact and the arc-extinguishing grids on the front side and the rear side of the second static contact are arranged in a split type.
The invention has the beneficial effects that: the invention can improve the load cutting-off capability of the product, has no requirement on the load installation polarity of the first static contact and the second static contact, achieves the purpose of no polarity of the real external load, and well solves the practical problem in the application process of the product.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a schematic structural diagram of the insulating cover, the first stationary contact, the second stationary contact, the first magnet, the second magnet, and the arc chute of the present invention;
fig. 3 is a schematic view of another perspective structure of the insulating cover, the first stationary contact, the second stationary contact, the first magnet, the second magnet, and the arc chute of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 2 with the insulating cover hidden;
fig. 5 is a top view of the first stationary contact, the second stationary contact, the first magnet, the second magnet, and the arc chute of the present invention in cooperation;
fig. 6 is a top view of the first stationary contact, the second stationary contact, the arc chute and the arc-shaped connecting plate of the present invention;
wherein: 1. an insulating cover; 11. an arc-extinguishing chamber; 12. a containing groove; 2. a yoke iron plate; 3. a support; 41. a first fixed contact; 42. a second fixed contact; 43. a moving point plate; 5. a push rod; 6. an arc chute; 61. a protrusion; 62. an arc-shaped connecting plate; 71. a first magnet; 72. a second magnet; 81. a framework; 82. a movable iron core; 83. a magnetic conductive shaft sleeve; 84. a coil; 91. a counter-force spring; 92. an over travel spring; 93. and a clamp spring.
Detailed Description
The invention is further described with reference to the following examples.
As can be seen from fig. 1 to 5; the non-polar high-voltage direct-current contactor comprises an insulating cover 1, a yoke plate 2, a bracket 3, a moving point plate 43, a moving spring assembly, a first fixed contact 41 and a second fixed contact 42; an arc extinguishing chamber 11 is formed between the insulating cover 1 and the yoke plate 2; one end of the first fixed contact 41 and one end of the second fixed contact 42 both extend into and are fixed in the arc extinguishing chamber 11; the bracket 3 is arranged at the bottom of the yoke iron plate 2; the movable spring assembly comprises a push rod 5 and a magnetic circuit assembly; the magnetic circuit component is used for driving the push rod 5 to move so that the moving point plate 43 is respectively contacted with the first fixed contact 41 and the second fixed contact 42; the magnetic circuit assembly is arranged on the bracket 3.
Arc extinguishing grids 6 are arranged on the front side and the rear side of the first fixed contact 41 and the front side and the rear side of the second fixed contact 42 in the arc extinguishing chamber 11; a first magnet 71 is arranged on one side of the first fixed contact 41 close to the second fixed contact 42; the second fixed contact 42 is provided with a second magnet 72 at a side close to the first fixed contact 41; the first magnet 71 and the second magnet 72 are both fixed to the top of the insulating cover 1.
Specifically, in the non-polar high-voltage direct-current contactor according to this embodiment, the first magnet 71 and the second magnet 72 are disposed between the first stationary contact 41 and the second stationary contact 42, and the direction of the magnetic field between the first magnet 71 and the second magnet 72 is substantially the same as the direction of the connection line between the first stationary contact 41 and the second stationary contact 42, so that the electric arc when the first stationary contact 41 and the second stationary contact 42 are disconnected from the moving-point plate 43 is perpendicular to the direction of the magnetic field between the first magnet 71 and the second magnet 72, and the force of the magnetic field applied to the electric arc can be obtained according to the left-hand rule to be distributed to the arc-extinguishing grids 6 on both sides of the connection line between the centers of the first stationary contact 41 and the second stationary contact 42, and the arc-extinguishing grids 6 have a function of quickly extinguishing the arc, so that the load-carrying and breaking capability of the product can be improved, and the load-mounting polarity of the first stationary contact, the practical problem in the product application process is well solved.
In the non-polar high-voltage direct-current contactor according to this embodiment, the arc chute 6 is provided with a plurality of protrusions 61; the straight line where the first fixed contact 41 and the second fixed contact 42 are located is parallel to the transverse extending direction of the protrusion 61. In the non-polar high-voltage direct-current contactor according to this embodiment, the direction of the magnetic field between the first magnet 71 and the second magnet 72 is parallel to the straight line where the first fixed contact 41 and the second fixed contact 42 are located.
Specifically, through the above arrangement, the electric arc generated when the first and second fixed contacts 41 and 42 are disconnected from the moving point plate 43 can be perpendicular to the magnetic field direction between the first and second magnets 71 and 72, and the electric arc can directly move to the arc chutes 6 on the front and rear sides of the first fixed contact 41 and the front and rear sides of the second fixed contact 42 under the force of the magnetic field.
In the non-polar high-voltage direct-current contactor according to this embodiment, the first magnet 71 and the second magnet 72 are both square or arc-shaped.
In the non-polar high-voltage direct-current contactor according to this embodiment, the top of the insulating cover 1 is provided with a receiving groove 12 for receiving the first magnet 71, the shape of the first magnet 71 and the second magnet 72 of the second magnet 72. The first magnet 71 and the second magnet 72 are fixed by the above arrangement.
In the non-polar high-voltage direct-current contactor according to this embodiment, the magnetic circuit assembly includes a framework 81, a magnetic conductive shaft sleeve 83, a movable iron core 82 and a coil 84, which are all disposed on the support 3; the coil 84 is wound outside the framework 81; the magnetic conduction shaft sleeve 83 is arranged in the framework 81; the movable iron core 82 is arranged in a magnetic conduction shaft sleeve 83; one end of the push rod 5 is connected with the movable iron core 82; the other end of the push rod 5 is connected with a moving point plate 43.
Specifically, in the non-polar high-voltage direct-current contactor according to this embodiment, an arc extinguishing chamber 11 is formed between the insulating cover 1 and the yoke plate 2, the first stationary contact 41 and the second stationary contact 42 are fixed at the top of the arc extinguishing chamber 11, the moving point plate 43 moves in the arc extinguishing chamber 11, the push rod 5 penetrates into the arc extinguishing chamber 11 from the bottom of the yoke plate 2 and then is connected to the moving point plate 43, when the coil 84 is energized, the electromagnetic force generated by the magnetic circuit component moves the moving iron core 82 in the direction of closing the magnetic circuit, so that the moving iron core 82 drives the push rod 5 to move upward, and the moving point plate 43 is respectively in contact with the first stationary contact 41 and the second stationary contact 42.
In the non-polar high-voltage direct-current contactor according to this embodiment, a reaction spring 91 is disposed between the movable iron core 82 and the push rod 5; the push rod 5 is sleeved in the counter force spring 91. In the non-polar high-voltage direct-current contactor according to the embodiment, an over-travel spring 92 is arranged between the moving point plate 43 and the bottom of the insulating cover 1; the push rod 5 is sleeved in the overtravel spring 92. The movable iron core 82 is convenient to reset through the arrangement.
In the non-polar high-voltage direct-current contactor of this embodiment, clamp springs 93 are respectively disposed between the push rod 5 and the movable iron core 82 and between the push rod 5 and the movable point plate 43. The arrangement is convenient for the push rod 5 to be fixed with the movable iron core 82 and the movable point plate 43 respectively.
In the non-polar high-voltage direct-current contactor according to this embodiment, the arc chutes 6 on the front and rear sides of the first fixed contact 41 and the arc chutes 6 on the front and rear sides of the second fixed contact 42 are both separately arranged.
In the non-polar high-voltage direct-current contactor according to this embodiment, arc-shaped connection plates 62 are respectively disposed between the arc-extinguishing grids 6 on the front and rear sides of the first fixed contact 41 and between the arc-extinguishing grids 6 on the front and rear sides of the second fixed contact 42. The arc chute 6 is convenient to fix and disassemble.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A non-polar high voltage direct current contactor is characterized in that: the device comprises an insulating cover (1), a yoke plate (2), a bracket (3), a moving point plate (43), a moving spring assembly, a first fixed contact (41) and a second fixed contact (42); an arc extinguishing chamber (11) is formed between the insulating cover (1) and the yoke plate (2); one end of the first static contact (41) and one end of the second static contact (42) both extend into and are fixed in the arc extinguishing chamber (11); the bracket (3) is arranged at the bottom of the yoke iron plate (2); the movable spring assembly comprises a push rod (5) and a magnetic circuit assembly; the magnetic circuit component is used for driving the push rod (5) to move so that the moving point plate (43) is respectively contacted with the first fixed contact (41) and the second fixed contact (42); the magnetic circuit component is arranged on the bracket (3);
arc extinguishing grids (6) are arranged on the front side and the rear side of the first fixed contact (41) and the front side and the rear side of the second fixed contact (42) in the arc extinguishing chamber (11); a first magnet (71) is arranged on one side of the first fixed contact (41) close to the second fixed contact (42); a second magnet (72) is arranged on one side, close to the first fixed contact (41), of the second fixed contact (42); the first magnet (71) and the second magnet (72) are fixed on the top of the insulating cover (1).
2. A non-polar high voltage direct current contactor according to claim 1, characterized in that: the arc extinguishing grid (6) is provided with a plurality of bulges (61); the straight line where the first fixed contact (41) and the second fixed contact (42) are located is parallel to the transverse extending direction of the protrusion (61).
3. A non-polar high voltage direct current contactor according to claim 1, characterized in that: the direction of the magnetic field between the first magnet (71) and the second magnet (72) is parallel to the straight line where the first fixed contact (41) and the second fixed contact (42) are located.
4. A non-polar high voltage direct current contactor according to claim 1, characterized in that: the shape of the first magnet (71) and the shape of the second magnet (72) are both square or both arc-shaped.
5. A non-polar high voltage direct current contactor according to claim 1, characterized in that: the top of the insulating cover (1) is provided with a containing groove (12) for placing a first magnet (71) and a second magnet (72).
6. A non-polar high voltage direct current contactor according to claim 1, characterized in that: the magnetic circuit component comprises a framework (81), a magnetic conduction shaft sleeve (83), a movable iron core (82) and a coil (84) which are all arranged on the bracket (3); the coil (84) is wound outside the framework (81); the magnetic conduction shaft sleeve (83) is arranged in the framework (81); the movable iron core (82) is arranged in the magnetic conduction shaft sleeve (83); one end of the push rod (5) is connected with the movable iron core (82); the other end of the push rod (5) is connected with a moving point plate (43);
a reaction spring (91) is arranged between the movable iron core (82) and the push rod (5); the push rod (5) is sleeved in the counterforce spring (91).
7. A non-polar high voltage direct current contactor according to claim 1, characterized in that: an overtravel spring (92) is arranged between the moving point plate (43) and the bottom of the insulating cover (1); the push rod (5) is sleeved in the overtravel spring (92).
8. A non-polar high voltage direct current contactor according to claim 6, characterized in that: and clamp springs (93) are arranged between the push rod (5) and the movable iron core (82) and between the push rod (5) and the movable point plate (43).
9. A non-polar high voltage direct current contactor according to claim 1, characterized in that: arc-shaped connecting plates (62) are arranged between the arc-extinguishing grids (6) on the front side and the rear side of the first static contact (41) and between the arc-extinguishing grids (6) on the front side and the rear side of the second static contact (42).
10. A non-polar high voltage direct current contactor according to claim 1, characterized in that: arc extinguishing grids (6) on the front side and the rear side of the first fixed contact (41) and arc extinguishing grids (6) on the front side and the rear side of the second fixed contact (42) are arranged in a split mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040725.5A CN112382533A (en) | 2020-09-28 | 2020-09-28 | Non-polar high-voltage direct-current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040725.5A CN112382533A (en) | 2020-09-28 | 2020-09-28 | Non-polar high-voltage direct-current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112382533A true CN112382533A (en) | 2021-02-19 |
Family
ID=74579923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011040725.5A Pending CN112382533A (en) | 2020-09-28 | 2020-09-28 | Non-polar high-voltage direct-current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112382533A (en) |
-
2020
- 2020-09-28 CN CN202011040725.5A patent/CN112382533A/en active Pending
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