CN211376539U - DC contactor with built-in non-polar arc extinguishing system - Google Patents
DC contactor with built-in non-polar arc extinguishing system Download PDFInfo
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- CN211376539U CN211376539U CN201922041948.2U CN201922041948U CN211376539U CN 211376539 U CN211376539 U CN 211376539U CN 201922041948 U CN201922041948 U CN 201922041948U CN 211376539 U CN211376539 U CN 211376539U
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- contact bridge
- permanent magnet
- permanent magnets
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Abstract
The utility model discloses a direct current contactor with a built-in nonpolar arc extinguishing system, which comprises a contact bridge, a permanent magnet group, an arc extinguishing cover and an electromagnetic driving mechanism which are sealed in a shell, wherein the top of the shell is provided with a positive terminal and a negative terminal, the contact bridge is fixed at the top of a push rod through a split washer, the permanent magnet group comprises a plurality of strip-shaped permanent magnets, the permanent magnets are positioned at two sides of the contact bridge, the N pole or the S pole of each permanent magnet faces upwards, and the side wall of each permanent magnet is parallel to the side wall of the contact bridge; when the current flows in forward direction or flows in backward direction, the electric arc generated in the moment when the contact bridge is connected with the wiring terminal or disconnected blows the arc to the right or left or along the same direction, the opposite blowing phenomenon of the electric arc can not occur, so that the electric arc at the two poles is pulled away, the nonpolar arc extinguishing of the main loop is realized, the arc extinguishing effect is rapid and remarkable, and the application range of the direct current contactor is greatly improved.
Description
Technical Field
The utility model relates to a well high voltage electrical equipment technical field, specific direct current contactor that has nonpolarity arc extinguishing system is built-in to specific saying so.
Background
The direct current contactor adopts two arc extinguishing modes, one is inert gas arc extinguishing, and the other is magnetic blow arc extinguishing. The magnetic arc quenching is suitable for the working condition that the main circuit distinguishes the positive and negative electrodes, the positive and negative electrodes of the components in the main circuit are required to be connected in a one-to-one correspondence manner, once the positive and negative electrodes are reversely connected, the arc quenching direction is changed from arc quenching towards the two sides to arc quenching towards the middle, so that the condition that the arc cannot be quenched in the contact breaking process can occur, the product is damaged, and the line fault is caused; for the occasion of nonpolar operation (the main loop does not distinguish the positive pole and the negative pole), the conventional magnetic quenching product can not be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an it has nonpolarity arc extinguishing system's direct current contactor to embed, through the assembled mode of adjusting the interior permanent magnet of contactor, nonpolarity arc extinguishing when realizing the contact switch-on or dividing.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a direct current contactor with a built-in non-polar arc extinguishing system comprises a contact bridge, a permanent magnet group, an arc extinguishing cover and an electromagnetic driving mechanism which are sealed in a shell, wherein the top of the shell is provided with a positive terminal and a negative terminal, the contact bridge is fixed on the top of a push rod through a split washer, the permanent magnet group comprises a plurality of strip-shaped permanent magnets, the permanent magnets are placed perpendicular to a bottom plate of the direct current contactor, the permanent magnets are positioned on two sides of the contact bridge, the N pole or the S pole of each permanent magnet faces upwards, and the side walls of the permanent magnets are parallel to the side walls of; when the direct current contactor is electrified, the electromagnetic driving mechanism drives the push rod to do up-and-down reciprocating motion, so that the contact bridge is connected with or disconnected with the wiring terminal at the top of the contact bridge, and an electric arc generated at the moment of connection or disconnection blows in a specified direction under the magnetic blowing action of the permanent magnet, so that the electric arc is broken and is rapidly extinguished.
Preferably, the permanent magnet group comprises four permanent magnets, the four permanent magnets are perpendicular to a bottom plate of the direct current contactor and evenly distributed on two sides of the contact bridge, and the magnetic poles on the upper end surfaces of the two adjacent permanent magnets are different; when the direct current contactor is electrified, electric arcs generated at the moment of connection or disconnection between the contact bridge and the binding post blow arcs leftwards or rightwards simultaneously along the length direction of the contact bridge under the action of magnetic blow of the permanent magnet, the electric arcs are not connected, and the electric arcs are extinguished rapidly.
Preferably, the permanent magnet group comprises two permanent magnets, the two permanent magnets are arranged perpendicular to the bottom plate of the direct current contactor and are respectively positioned on two sides of the contact bridge, and the N poles of the two permanent magnets face upwards; when the direct current contactor is electrified, the electric arc generated at the moment when the contact bridge is connected with the wiring terminal or disconnected is blown in parallel along the position of one permanent magnet under the magnetic blowing action of the permanent magnet, the electric arc is not connected, and the electric arc is rapidly extinguished.
Preferably, the permanent magnet group comprises two permanent magnets, the two permanent magnets are arranged perpendicular to the bottom plate of the direct current contactor and are respectively positioned on two sides of the contact bridge, and S poles of the two permanent magnets face upwards; when the direct current contactor is electrified, the electric arc generated at the moment when the contact bridge is connected with the wiring terminal or disconnected is blown in parallel along the position of one permanent magnet under the magnetic blowing action of the permanent magnet, the electric arc is not connected, and the electric arc is rapidly extinguished.
Preferably, the electromagnetic driving mechanism comprises a contact spring, a magnetic conduction plate, a reaction spring and a moving iron which are sequentially arranged on the side wall of the push rod from top to bottom, the outer side of the moving iron is provided with a magnetic conduction ring and a coil, and the upper surface of the magnetic conduction plate is provided with a gasket.
Preferably, the permanent magnet is a permanent ferrite or a neodymium iron boron magnet.
The utility model discloses a theory of operation does: according to the left-hand rule, the magnetic induction line passes through the palm of the hand, the directions pointed by the four fingers are the current directions, and the direction of the thumb is the arc stress direction (the arc blowing direction). The utility model discloses an adjustment assembly is in the quantity and the magnetic pole direction of the permanent magnet of contact bridge both sides, when guaranteeing that the electric current flows in forward or backward flow, contact bridge and positive and negative terminal switch-on or divide the electric arc that produces in the twinkling of an eye when breaking simultaneously right or simultaneously or along the parallel arc-blowing of same direction, the electric arc relative blow phenomenon in opposite directions can not appear, thereby guarantee that two poles of the earth electric arc is pulled open, realize the nonpolarity arc extinguishing of major loop, the arc extinguishing effect is rapid, showing, direct current contactor's application scope has been improved greatly.
The permanent magnet is permanent ferrite or neodymium iron boron magnet, and the magnetizing form is easy to realize.
Drawings
Fig. 1 is a front sectional view of the present invention;
fig. 2 is a side cross-sectional view of the invention of fig. 1;
FIG. 3 is a schematic diagram of arc extinguishing when 4 permanent magnets in FIG. 1 are connected with forward current;
FIG. 4 is a schematic diagram of the arc extinguishing of 4 permanent magnets of FIG. 1 when reverse current is applied;
FIG. 5 is a schematic diagram of arc extinction when the permanent magnet in FIG. 1 is 2 and the N pole of the permanent magnet is upward to connect with a forward current;
FIG. 6 is a schematic diagram of arc extinguishing when the permanent magnet in FIG. 1 is 2 and the N pole of the permanent magnet is upward to connect the reverse current;
FIG. 7 is a schematic diagram of arc extinction when the permanent magnet in FIG. 1 is 2 and the S pole of the permanent magnet is upward to connect with a forward current;
FIG. 8 is a schematic diagram of arc extinction when the permanent magnets in FIG. 1 are 2 and the S pole of the permanent magnet is upward to connect the reverse current;
in the figure: 1. the device comprises a binding post, 2, a contact bridge, 3, a gasket, 4, a push rod, 5, a moving iron, 6, a magnetic conduction ring, 7, a split washer, 8, a contact spring, 9, a counter-force spring, 10, a magnetic conduction plate, 11, a coil, 12, a shell, 13, a permanent magnet, 14 and an arc extinguishing cover.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, fig. 2, fig. 3 or fig. 4, the dc contactor with a built-in non-polar arc extinguishing system comprises a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic driving mechanism, wherein the top of the housing 12 is provided with a positive terminal 1 and a negative terminal 1, the contact bridge 2 is fixed on the top of a push rod 4 through an open retainer ring 7, the permanent magnet group 13 comprises four permanent magnets, the four permanent magnets are arranged perpendicular to a bottom plate of the dc contactor and are uniformly distributed on two sides of the contact bridge 2, and the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the magnetic poles on the upper end surfaces of two adjacent permanent magnets are different.
As shown in fig. 3, when the direct current contactor is powered by a forward current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top of the contact bridge, an electric arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 simultaneously blows an arc leftwards along the length direction of the contact bridge 2 under the magnetic blowing action of the permanent magnet, the electric arc is not connected, and the electric arc is rapidly extinguished.
As shown in fig. 4, when the dc contactor is energized with a reverse current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top thereof, and an arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 simultaneously blows to the right along the length direction of the contact bridge 2 under the magnetic blowing action of the permanent magnet, so that the arc is not connected, and the arc is rapidly extinguished.
Example 2
As shown in fig. 1, fig. 2, fig. 5 or fig. 6, the dc contactor with a built-in non-polar arc extinguishing system comprises a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic driving mechanism, wherein the top of the housing 12 is provided with a positive terminal 1 and a negative terminal 1, the contact bridge 2 is fixed on the top of a push rod 4 through an open retainer ring 7, the permanent magnet group 13 comprises two permanent magnets, the two permanent magnets are arranged perpendicular to a bottom plate of the dc contactor and are respectively positioned at two sides of the contact bridge 2, and the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the N poles of the two permanent magnets face upwards.
As shown in fig. 5, when the direct current contactor is powered by a forward current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top of the contact bridge, an electric arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 blows an arc in parallel towards the position of one of the permanent magnets under the magnetic blowing action of the permanent magnets, the electric arc is not connected, and the electric arc is rapidly extinguished.
As shown in fig. 6, when the dc contactor is energized with a reverse current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top thereof, and an arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 blows in parallel towards the position of another permanent magnet under the magnetic blowing action of the permanent magnet, so that the arc is not connected, and the arc is rapidly extinguished.
Example 3
As shown in fig. 1, fig. 2, fig. 7 or fig. 8, the dc contactor with a built-in non-polar arc extinguishing system comprises a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic driving mechanism, wherein the top of the housing 12 is provided with a positive terminal 1 and a negative terminal 1, the contact bridge 2 is fixed on the top of a push rod 4 through an open retainer ring 7, the permanent magnet group 13 comprises two permanent magnets, the two permanent magnets are arranged perpendicular to a bottom plate of the dc contactor and are respectively positioned at two sides of the contact bridge 2, and the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the S poles of the two permanent magnets face upwards.
As shown in fig. 7, when the direct current contactor is powered by a forward current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top of the contact bridge, an electric arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 blows an arc in parallel towards the position of one of the permanent magnets under the magnetic blowing action of the permanent magnets, the electric arc is not connected, and the electric arc is rapidly extinguished.
As shown in fig. 8, when the dc contactor is energized with a reverse current, the electromagnetic driving mechanism drives the push rod 4 to reciprocate up and down, so that the contact bridge 2 is connected with or disconnected from the terminal 1 at the top thereof, and an arc generated at the moment when the contact bridge 2 is connected with or disconnected from the terminal 1 blows in parallel towards the position of another permanent magnet under the magnetic blowing action of the permanent magnet, so that the arc is not connected, and the arc is rapidly extinguished.
The electromagnetic driving mechanism in the above embodiment includes a contact spring 8, a magnetic conductive plate 10, a reaction spring 9 and a moving iron 5, which are sequentially installed on the side wall of the push rod 4 from top to bottom, the magnetic conductive ring 6 and the coil 11 are installed on the outer side of the moving iron 5, and the gasket 3 is installed on the upper surface of the magnetic conductive plate 10. The permanent magnet is permanent ferrite or neodymium iron boron magnet.
The utility model discloses an adjustment assembly is in the quantity and the magnetic pole direction of the permanent magnet of contact bridge both sides, when guaranteeing that the electric current flows in forward or backward flow, contact bridge and positive and negative terminal switch-on or divide the electric arc that produces in the twinkling of an eye simultaneously right or simultaneously or along the parallel arc-blowing of same direction, the electric arc relative blow phenomenon in opposite directions can not appear to guarantee that two poles of the earth electric arc is pulled open, realize the nonpolarity arc extinguishing of major loop, the arc extinguishing effect is rapid, showing, direct current contactor's application scope has been improved greatly.
Claims (6)
1. The utility model provides a built-in direct current contactor who has nonpolarity arc extinguishing system, it is including sealed contact bridge (2), permanent magnet group (13), arc-extinguishing chamber (14) and the electromagnetic drive mechanism in casing (12), and two positive and negative terminals (1) are installed at the top of casing (12), and contact bridge (2) are fixed at the top of push rod (4) through split washer (7), its characterized in that: the permanent magnet group (13) comprises a plurality of strip-shaped permanent magnets, the permanent magnets are perpendicular to the bottom plate of the direct current contactor and are positioned on two sides of the contact bridge (2), the N pole or the S pole of each permanent magnet is upward, and the side walls of the permanent magnets are parallel to the side walls of the contact bridge (2); when the direct current contactor is electrified, the electromagnetic driving mechanism drives the push rod (4) to do up-and-down reciprocating motion, so that the contact bridge (2) is connected with or disconnected with the wiring terminal (1) at the top of the contact bridge, and electric arcs generated at the moment of connection or disconnection are blown in a specified direction under the magnetic blowing action of the permanent magnet, so that the electric arcs are broken and are rapidly extinguished.
2. The dc contactor having a non-polar arc extinguishing system built therein according to claim 1, wherein: the permanent magnet group (13) comprises four permanent magnets, the four permanent magnets are perpendicular to a bottom plate of the direct current contactor and are uniformly distributed on two sides of the contact bridge (2), and magnetic poles on the upper end surfaces of the two adjacent permanent magnets are different; when the direct current contactor is electrified, the electric arc generated at the moment of connection or disconnection between the contact bridge (2) and the binding post (1) blows the arc leftwards or rightwards simultaneously along the length direction of the contact bridge (2) under the action of magnetic blowing of the permanent magnet, the electric arc is not connected, and the electric arc is extinguished rapidly.
3. The dc contactor having a non-polar arc extinguishing system built therein according to claim 1, wherein: the permanent magnet group (13) comprises two permanent magnets, the two permanent magnets are perpendicular to a bottom plate of the direct current contactor and are respectively positioned on two sides of the contact bridge (2), and N poles of the two permanent magnets face upwards; when the direct current contactor is electrified, the electric arc generated at the moment when the contact bridge (2) is connected with the binding post (1) or is disconnected is blown in parallel towards the position of one permanent magnet under the magnetic blowing action of the permanent magnet, the electric arc is not connected, and the electric arc is rapidly extinguished.
4. The dc contactor having a non-polar arc extinguishing system built therein according to claim 1, wherein: the permanent magnet group (13) comprises two permanent magnets, the two permanent magnets are perpendicular to a bottom plate of the direct current contactor and are respectively positioned on two sides of the contact bridge (2), and S poles of the two permanent magnets face upwards; when the direct current contactor is electrified, the electric arc generated at the moment when the contact bridge (2) is connected with the binding post (1) or is disconnected is blown in parallel towards the position of one permanent magnet under the magnetic blowing action of the permanent magnet, the electric arc is not connected, and the electric arc is rapidly extinguished.
5. The dc contactor having the non-polar arc extinguishing system built therein according to any one of claims 1 to 4, wherein: the electromagnetic driving mechanism comprises a contact spring (8), a magnetic conduction plate (10), a counter-force spring (9) and a moving iron (5) which are sequentially arranged on the side wall of a push rod (4) from top to bottom, a magnetic conduction ring (6) and a coil (11) are arranged on the outer side of the moving iron (5), and a gasket (3) is arranged on the upper surface of the magnetic conduction plate (10).
6. The dc contactor having a non-polar arc extinguishing system built therein according to claim 5, wherein: the permanent magnet is a permanent magnetic ferrite or a neodymium iron boron magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922041948.2U CN211376539U (en) | 2019-11-13 | 2019-11-13 | DC contactor with built-in non-polar arc extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922041948.2U CN211376539U (en) | 2019-11-13 | 2019-11-13 | DC contactor with built-in non-polar arc extinguishing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211376539U true CN211376539U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922041948.2U Active CN211376539U (en) | 2019-11-13 | 2019-11-13 | DC contactor with built-in non-polar arc extinguishing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211376539U (en) |
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2019
- 2019-11-13 CN CN201922041948.2U patent/CN211376539U/en active Active
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