CN114975008B

CN114975008B - Non-polarized current contactor controlled by small current

Info

Publication number: CN114975008B
Application number: CN202210528835.9A
Authority: CN
Inventors: 冯燕
Original assignee: Guangzhou Sifang Huaneng Power Grid Control System Co ltd
Current assignee: Guangzhou Sifang Huaneng Power Grid Control System Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2023-04-11
Anticipated expiration: 2042-05-16
Also published as: CN114975008A

Abstract

The invention relates to the technical field of power control, and discloses a small-current-controlled non-polarized current contactor which comprises a shell, wherein a storage cavity is formed in the shell, an iron core is movably sleeved at one end of the storage cavity, a positioning seat is fixedly sleeved at the middle part of the storage cavity, an electromagnetic coil is fixedly connected at the middle part of one end of the positioning seat, the middle part of the iron core is convexly inserted into the electromagnetic coil, four spring pieces are fixedly connected at the other end of the positioning seat, and the two spring pieces are in a pair. In the moving process of the armature, the friction bulge II and the friction bulge I generate collision friction, so that the spring piece is quickly shaken left and right under the influence of friction, the arc-extinguishing plates are synchronously quickly shaken left and right, the arc-extinguishing plates cut, collide and pull the electric arc generated when the moving contact is separated from the fixed contact, the electric arc is elongated and differentially consumed in a short time, and the aim of quickly extinguishing the arc is fulfilled.

Description

Non-polarized current contactor controlled by small current

Technical Field

The invention relates to the technical field of power control, in particular to a non-polarized current contactor controlled by small current.

Background

A non-polarized current contactor is a device for controlling a strong current circuit to be switched on and off by an electromagnet, and the purpose of switching on the strong current circuit is achieved by mainly electrifying a coil of the electromagnet to enable the electromagnet to magnetically attract an armature and enable the armature to move so as to enable a movable contact to be in contact with a fixed contact.

After the coil at the electro-magnet loses the electric current, the electro-magnet will lose magnetism, the spring of compression this moment will drive armature and reset, make movable contact and decide the contact and force the separation, thereby make the heavy current circuit disconnection, but at this in-process, moving contact and deciding will produce electric arc between the contact, simultaneously there is high temperature to produce along with, make the inside temperature of contactor rise fast, for this reason, all can set up arc control device in the contactor and carry out the arc extinguishing, it leads to the heavy current circuit to continue to switch on to avoid electric arc to last, can't reach the effective break-make to the heavy current circuit, electric arc duration overlength can lead to the temperature to last rising simultaneously, lead to inside device to deform under the high temperature, be unfavorable for the normal use of contactor, and current arc control device effect is single, it can only carry out the arc extinguishing processing that the top was mentioned, but the time of its arc extinguishing is still longer, and can's the timely processing of high temperature to the production can's of accomplishing.

Disclosure of Invention

The invention provides a non-polarized current contactor controlled by small current, aiming at the defects of the existing non-polarized current contactor in the use process in the background technology, and the non-polarized current contactor provided by the invention has the advantages that an armature moves to enable a friction bulge I and a friction bulge II to collide and rub, a spring piece rapidly shakes in the collision friction, an arc extinguishing plate rapidly shakes to pull and collide an electric arc, the electric arc is influenced by the arc extinguishing plate to elongate and jump, the shaking enables a heavier fan blade to rapidly rotate under the action of inertia to form stirring air flow, the stirring air flow drives high-temperature air flow in the contactor to carry out heat exchange and cooling, the stirring air flow acts on the electric arc to cool the electric arc, and the stirring air flow pulls the electric arc to elongate and rapidly extinguish the electric arc.

The invention provides the following technical scheme: the utility model provides a by little electric current control's non-polarization current contactor, includes the casing, set up in the casing and put the thing chamber, the one end activity of putting the thing chamber is cup jointed the iron core, the middle part of putting the thing chamber is fixed and is cup jointed the positioning seat, the one end middle part fixedly connected with solenoid of positioning seat, the middle part protrusion of iron core inserts in the solenoid, four spring leafs of the other end fixedly connected with of positioning seat, two the spring leaf is a pair of, and is a pair of one end fixedly connected with of spring leaf is violently gone on the seat, below the bottom of violently going on the seat and the top of the violently going on seat all fixedly connected with arc extinguishing plate of equipartition, the one end activity of putting the thing chamber is cup jointed armature, the spring leaf just is equipped with the protruding I of friction of equipartition to one side of armature, the protruding outside activity of middle part of armature has cup jointed the spring, the both ends of armature are equipped with the protruding II of friction of equipartition, friction is protruding II and the crisscross distribution with the one end of the armature, the one end middle part fixedly connected with connecting block of armature, the one end fixedly connected with the dead lever of equipartition, the top and the bottom fixedly connected with moving contact of dead lever.

Preferably, the center of one end of the transverse base, which is far away from the arc-extinguishing plate, is movably connected with a rotating shaft, a torsion spring is arranged on the rotating shaft, two symmetrical fan blades are fixedly connected to the rotating shaft, and the weight of one of the fan blades is larger than that of the other fan blade.

Preferably, put the fixing base of top and bottom one side fixedly connected with symmetry in the thing chamber, the one end fixedly connected with equipartition of fixing base decides the contact, decide the contact and put through with the heavy current circuit, the one end fixedly connected with auxiliary contact of thing chamber.

Preferably, the shell is provided with a vent hole, and the storage cavity is communicated with the outside through the vent hole.

Preferably, the top and the bottom of positioning seat all set up the spacing hole that runs through, the iron core is the E font, the top and the bottom protrusion position of iron core insert spacing downthehole, armature is the E font, the arch of armature top and bottom all inserts spacing downthehole.

Preferably, the moving contact and the fixed contact are positioned on the same straight line, and the moving contact is communicated with a strong current circuit.

Preferably, the electromagnetic coil is connected with a control current circuit.

Preferably, the two pairs of spring pieces are symmetrical by taking the armature as a center, and the arc extinguishing plates are close to the middle parts of the moving contact and the fixed contact.

The invention has the following beneficial effects:

1. in the moving process of the armature, the friction bulge II collides and rubs with the friction bulge I, so that the spring piece is quickly shaken left and right under the influence of friction, the arc-extinguishing plate is synchronously and quickly shaken left and right, the arc-extinguishing plate cuts, collides and pulls the electric arc generated when the moving contact is separated from the fixed contact, and the electric arc is elongated, differentiated and consumed in a short time, thereby achieving the purpose of quickly extinguishing the arc.

2. When the spring piece rapidly shakes left and right, the spring piece can drive the transverse moving seat to synchronously and rapidly shake left and right, so that the heavier fan blade on one side of the rotating shaft is subjected to reciprocating deflection under the action of inertia and the restoring force of the torsion spring, the fan blade rapidly rotates in a reciprocating mode in a short time, rapid airflow stirring is performed in the accommodating cavity, high temperature is generated when the movable contact and the fixed contact are separated, and cooling heat exchange can be rapidly completed through the ventilation holes under the stirring of the airflow.

3. The invention forms rapid airflow stirring in the object placing cavity through the rotation of the fan blades, so that the stirring airflow passes through the electric arc generated by the moving contact, the stirring airflow performs multidirectional arc blowing action on the electric arc, the electric arc is influenced by the airflow to be rapidly cooled, and meanwhile, the electric arc is influenced by the airflow to be elongated, thereby further accelerating the arc extinguishing action of the electric arc.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the housing structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the storage compartment according to the present invention;

FIG. 4 is a schematic structural diagram of a movable contact according to the present invention;

FIG. 5 is a schematic view of an armature construction of the present invention;

FIG. 6 is a schematic structural view of a friction projection II according to the present invention;

FIG. 7 is a schematic view of the positioning seat of the present invention;

fig. 8 is a schematic diagram of the core structure of the present invention.

In the figure: 1. a housing; 2. a storage cavity; 3. a vent hole; 4. a fixed seat; 5. fixing a contact; 6. an auxiliary contact; 7. an iron core; 8. positioning seats; 801. a limiting hole; 9. an electromagnetic coil; 10. a spring plate; 11. a friction bulge I; 12. a transverse moving seat; 13. an arc extinguishing plate; 14. a rotating shaft; 15. a fan blade; 16. an armature; 17. a spring; 18. connecting blocks; 19. a fixing rod; 20. a moving contact; 21. and a friction bulge II.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 2, a non-polarized current contactor controlled by a small current includes a housing 1, a storage cavity 2 is formed in the housing 1, a vent hole 3 is formed in the housing 1, the storage cavity 2 is communicated with the outside through the vent hole 3, when a stirring airflow is generated in the storage cavity 2, a high temperature airflow in the storage cavity 2 can be rapidly exchanged with the outside through the vent hole 3 to complete heat exchange, symmetrical fixing seats 4 are fixedly connected to one sides of the top end and the bottom end in the storage cavity 2, uniformly distributed fixed contacts 5 are fixedly connected to one end of each fixing seat 4, the fixed contacts 5 are communicated with a strong current circuit, one end of the strong current circuit is communicated with a strong current power supply, the other end of the strong current circuit is communicated with a working component, the strong current circuit is disconnected from the fixed contacts 5 and the moving contacts 20, and an auxiliary contact 6 is fixedly connected to one end of the storage cavity 2.

Referring to fig. 3 to 7, a positioning seat 8 is fixedly sleeved in the middle of an object placing cavity 2, penetrating limiting holes 801 are respectively formed in the top and the bottom of the positioning seat 8, an electromagnetic coil 9 is fixedly connected to the middle of one end of the positioning seat 8, the electromagnetic coil 9 is connected with a control current circuit, when the electromagnetic coil 9 is connected with the control current circuit, an iron core 7 in the electromagnetic coil can obtain magnetism, the iron core 7 attracts an armature 16, four spring pieces 10 are fixedly connected to the other end of the positioning seat 8, two spring pieces 10 are a pair, two pairs of spring pieces 10 are symmetrical with the armature 16 as a center, friction protrusions i 11 are uniformly distributed on one side of each spring piece 10, which is opposite to the armature 16, one end of each pair of spring pieces 10 is fixedly connected with a transverse seat 12, the transverse seat 12 is stable, position deviation of the spring pieces 10 due to multiple times of shaking does not occur, and a subsequent arc extinguishing plate 13 falls between a movable contact 20 and a fixed contact 5, the problem that the movable contact 20 and the fixed contact 5 cannot be closed is caused, the bottom end of the lower transverse base 12 and the top end of the upper transverse base 12 are fixedly connected with arc extinguishing plates 13 which are uniformly distributed, the arc extinguishing plates 13 are close to the middle parts of the movable contact 20 and the fixed contact 5, when the movable contact 20 and the fixed contact 5 are forcibly separated to generate electric arcs, the arc extinguishing plates 13 can directly act on the electric arcs, the center of one end of the transverse base 12, which is far away from the arc extinguishing plates 13, is movably connected with a rotating shaft 14, a torsion spring is arranged on the rotating shaft 14, two symmetrical fan blades 15 are fixedly connected on the rotating shaft 14, the weight of one fan blade 15 is larger than that of the other fan blade 15, when the spring piece 10 is rapidly shaken, the transverse base 12 synchronously and rapidly shakes, so that the heavier fan blade 15 is influenced by inertia to deflect to one side in shaking, the torsion spring stores energy, and when the spring piece is shaken and reset, the heavier fan blade 15 is influenced by inertia to reversely deflect again, and original inertia force is overcome fast to the torsional spring that the cooperation holds the ability, makes flabellum 15 reset and rotate and can not appear great time gap to make flabellum 15 accomplish quick reciprocating rotation and form and mix the air current in rocking, make and mix the air current when carrying out quick heat transfer, also make and mix the air current and act on electric arc, make electric arc receive the air current influence and cool off fast, make electric arc receive the air current and pull and appear pulling the arc, further accelerate the arc extinguishing effect of electric arc.

Referring to fig. 3 to 4 and 8, the iron core 7 is movably sleeved at one end of the storage cavity 2, the iron core 7 is shaped like an E, the protruding parts at the top and the bottom of the iron core 7 are inserted into the limiting holes 801, and the middle part of the iron core 7 protrudes into the electromagnetic coil 9, so that the iron core 7 can obtain magnetism when the electromagnetic coil 9 receives current.

Referring to fig. 3 to 6, an armature 16 is movably sleeved at one end of the storage cavity 2, the armature 16 is E-shaped, protrusions at the top and the bottom of the armature 16 are inserted into the limiting hole 801, so that the armature 16 can be influenced by the limiting hole 801 in the moving process, and the armature 16 is prevented from moving away from a track, so that the moving contact 20 and the fixed contact 5 are separated, a spring 17 is movably sleeved outside the protrusion at the middle of the armature 16, one end of the spring 17 is attached to the armature 16, and the other end is attached to the positioning seat 8, so that when the armature 16 moves towards the iron core 7, the spring 17 can compress to store energy, when the iron core 7 loses magnetism, the compressed spring 17 can drive the armature 16 to reset, friction protrusions ii 21 are uniformly distributed at two ends of the armature 16, the friction protrusions ii 21 and the friction protrusions i 11 are alternately distributed, so that the friction protrusions ii 21 collide with the friction protrusions i 11 in the moving process of the armature 16, so that the spring leaf 10 shakes under the collision friction, so that the moving contact 10 drives the arc extinguishing plate 13 to synchronously shake through the arc extinguishing plate 13, so that the arc extinguishing plate 13 collides with the fixed contact 20, the fixed contact 20 is connected to the fixed at the top of the fixed contact 20, and the fixed contact 18 are connected to make the fixed contact.

The use method (working principle) of the invention is as follows:

firstly, when a strong current circuit needs to be communicated, a control current is input to the electromagnetic coil 9, so that the iron core 7 obtains magnetism, the armature 16 is attracted by the iron core 7 and moves towards the direction of the iron core 7, the spring 17 is compressed, the armature 16 drives the moving contact 20 to synchronously move through the connecting block 18 and the fixed rod 19, and the moving contact 20 is separated from the auxiliary contact 6;

then, when the armature 16 moves towards the iron core 7, the friction bulge II 21 collides and rubs with the friction bulge I11, so that the spring piece 10 is shaken in a reciprocating manner under the collision and friction, the spring piece 10 drives the arc extinguishing plate 13 to shake in a synchronous reciprocating manner through the transverse base 12, the heavier fan blade 15 on the rotating shaft 14 is rotated under the shaking inertia force, and is rotated under the restoring force of the torsion spring on the rotating shaft 14 and the shaking inertia force during the shaking reset, so that the fan blade 15 rotates in a reciprocating manner to generate stirring air flow, then the moving contact 20 contacts the fixed contact 5, the armature 16 stops moving, and at the moment, a strong current circuit is connected through the fixed contact 5 and the moving contact 20;

finally, when a strong current circuit needs to be closed, the power supply to the electromagnetic coil 9 is stopped, the iron core 7 loses magnetism, the compressed spring 17 pushes the armature 16 to rapidly get away from the iron core 7, at the moment, the moving contact 20 is forcedly separated from the fixed contact 5, an electric arc is generated during separation, then the armature 16 moves, the friction protrusion II 21 is again in collision friction with the friction protrusion I11, the spring piece 10 is made to shake in a reciprocating manner under the collision friction, the spring piece 10 is made to drive the arc extinguishing plate 13 to shake in a synchronous reciprocating manner through the transverse seat 12, the arc extinguishing plate 13 is made to collide with the electric arc, the electric arc is pulled, the electric arc is jumped and lengthened, meanwhile, the heavier fan blades 15 on the rotating shaft 14 are made to rotate under the inertia force of shaking, and are rotated under the restoring force of a torsion spring on the rotating shaft 14 and the shaking inertia force during the shaking reset, the reciprocating rotation of the fan blades 15 is made to generate stirring air flow, the stirring air flow acts on the electric arc, the electric arc is made to be rapidly cooled under the influence of multidirectional air flow, and is rapidly lengthened under the pulling of the air flow, the arc extinguishing plate 13 to perform rapid cooling, finally, the moving contact 20 again with the auxiliary contact 6, and the arc extinguishing circuit can be connected to wait for next time, and the next power connection.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

1. A non-polarized contactor controlled by small currents, comprising a casing (1), characterized in that: the friction device is characterized in that a storage cavity (2) is formed in the shell (1), an iron core (7) is movably sleeved at one end of the storage cavity (2), a positioning seat (8) is fixedly sleeved at the middle of the storage cavity (2), an electromagnetic coil (9) is fixedly connected at the middle of one end of the positioning seat (8), the middle of the iron core (7) is convexly inserted into the electromagnetic coil (9), four spring pieces (10) are fixedly connected at the other end of the positioning seat (8), two spring pieces (10) are in a pair, one end of each spring piece (10) is fixedly connected with a transverse seat (12), the lower side of each transverse seat (12) is fixedly connected with an arc extinguishing plate (13) uniformly distributed at the bottom end of each transverse seat and the top end of each transverse seat (12) above, an armature (16) is movably sleeved at one end of the storage cavity (2), the spring pieces (10) are provided with friction bulges I (11) uniformly distributed on one side of the armature (16), springs (17) are movably sleeved at the outer sides of the middle bulges outside of the armature (16), friction bulges II (21) are provided with uniformly distributed in a collision manner, and the friction bulges (11) and the friction bulges (21) are distributed in a staggered manner, the spring piece (10) is enabled to shake in a reciprocating mode under collision friction, the middle of one end of the armature iron (16) is fixedly connected with a connecting block (18), one surface of the connecting block (18) is fixedly connected with fixing rods (19) which are uniformly distributed, and the top and the bottom of each fixing rod (19) are fixedly connected with moving contacts (20);

the utility model discloses a spacing hole (801) that run through is all seted up to the top and the bottom of positioning seat (8), iron core (7) are the E font, the top and the bottom of iron core (7) bulge in the position insert spacing hole (801), armature (16) are the E font, two pairs in the arch of armature (16) top and bottom all inserts spacing hole (801), spring leaf (10) use armature (16) as central symmetry.

2. A low current controlled non-polar current contactor according to claim 1, wherein: put top and bottom one side fixedly connected with symmetrical fixing base (4) in thing chamber (2), the one end fixedly connected with equipartition of fixing base (4) decides contact (5), decide contact (5) and high current circuit switch-on, put one end fixedly connected with auxiliary contact (6) of thing chamber (2).

3. A small current controlled non-polar current contactor as claimed in claim 1, wherein: the shell (1) is provided with a ventilation hole (3), and the storage cavity (2) is communicated with the outside through the ventilation hole (3).

4. A low current controlled non-polar current contactor according to claim 3, wherein: the moving contact (20) and the fixed contact (5) are positioned on the same straight line, the moving contact (20) is communicated with a strong current circuit, and the arc extinguishing plate (13) is close to the middle parts of the moving contact (20) and the fixed contact (5).

5. A small current controlled non-polar current contactor as claimed in claim 1, wherein: the electromagnetic coil (9) is connected to a control current circuit.