CN114975008A

CN114975008A - Non-polarized current contactor controlled by small current

Info

Publication number: CN114975008A
Application number: CN202210528835.9A
Authority: CN
Inventors: 冯燕
Original assignee: Yangzhou Run Wo Technology 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: 2022-08-30
Anticipated expiration: 2042-05-16
Also published as: CN114975008B

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 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.

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.

When the coil of the electromagnet loses current, the electromagnet loses magnetism, and the compressed spring drives the armature to reset, so that the movable contact and the fixed contact are separated forcibly, so as to break the high current circuit, but in the process, an electric arc is generated between the movable contact and the fixed contact, meanwhile, the temperature inside the contactor is rapidly raised along with the generation of high temperature, therefore, the arc extinguishing device is arranged in the contactor to extinguish the arc, the continuous conduction of a strong current circuit caused by the continuous electric arc is avoided, the effective on-off of the strong current circuit can not be achieved, meanwhile, if the arc duration is too long, the temperature is continuously increased, internal devices are deformed at high temperature, the normal use of the contactor is not facilitated, the existing arc extinguishing device has a single effect, the arc extinguishing treatment mentioned above can be carried out, but the arc extinguishing time is still long, and the generated high temperature cannot be treated in time.

Disclosure of Invention

The invention provides a small-current controlled non-polarized current contactor, which aims to overcome the defects of the existing non-polarized current contactor in the use process in the background technology, and 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 quickly shakes in the collision and rubbing, an arc extinguishing plate quickly shakes to pull and collide an electric arc, the electric arc is influenced by the arc extinguishing plate to elongate and bounce, heavier fan blades quickly rotate under the action of torsional spring due to inertia influence to form stirring air flow, the stirring air flow drives high-temperature air flow in the contactor to exchange heat and cool, the stirring air flow acts on the electric arc to cool, and the stirring air flow pulls the electric arc to elongate and quickly extinguish the electric arc.

The invention provides the following technical scheme: a small-current controlled non-polarized current contactor 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 of the storage cavity, an electromagnetic coil is fixedly connected at the middle of one end of the positioning seat, the middle 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, the two spring pieces are a pair, one end of each spring piece is fixedly connected with a transverse seat, the bottom end of the transverse seat below the positioning seat and the top end of the transverse seat above the positioning seat are fixedly connected with arc extinguishing plates which are uniformly distributed, an armature is movably sleeved at one end of the storage cavity, friction bulges I which are uniformly distributed are arranged on one side, facing the armature, of the spring pieces are movably sleeved at the outer side of the middle bulges of the armature, springs are movably sleeved at the outer sides of the bulges, friction bulges II which are uniformly distributed are arranged at the two ends of the armature, the friction bulges II and the friction bulges I are distributed in a staggered mode, the middle of one end of the armature is fixedly connected with a connecting block, one end of the connecting block is fixedly connected with fixing rods which are uniformly distributed, and moving contacts are fixedly connected to the tops and the bottoms of the fixing rods.

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 ventilation hole, and the storage cavity is communicated with the outside through the ventilation 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 solenoid is connected to 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 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.

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 fan blades rotate to form rapid airflow stirring in the object placing cavity, so that the stirring airflow passes through the electric arc generated by the moving contact, the stirring airflow performs a multidirectional arc blowing effect 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, so that the arc extinguishing effect of the electric arc is further accelerated.

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. fixing the 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 in an E shape, protrusions at the top and the bottom of the armature 16 are inserted into a limiting hole 801, so that the armature 16 can be influenced by the limiting hole 801 in the moving process, the displacement of the armature 16 is prevented from being separated from a track, and the moving contact 20 and the fixed contact 5 are separated, a spring 17 is movably sleeved outside a middle protrusion 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 be compressed 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 are distributed in a staggered manner with the friction protrusions i 11, so that the friction protrusions ii 21 collide and rub with the friction protrusions i 11 in the moving process of the armature 16, make spring leaf 10 take place reciprocating type and rock under the collision friction, make spring leaf 10 drive arc-extinguishing plate 13 through horizontal seat 12 and do synchronous reciprocating type and rock, make arc-extinguishing plate 13 can strike the electric arc, drag electric arc, make electric arc beat and lengthen, the one end middle part fixedly connected with connecting block 18 of armature 16, the dead lever 19 of the one end fixedly connected with equipartition of connecting block 18, the top and the bottom fixedly connected with moving contact 20 of dead lever 19, moving contact 20 is in same straight line with fixed contact 5, moving contact 20 and the switch-on of strong current circuit.

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

firstly, when a strong current circuit needs to be communicated, 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 be away from the iron core 7 quickly, the moving contact 20 is separated from the fixed contact 5 forcibly, an electric arc is generated during separation, then the armature 16 moves, the friction bulge II 21 is collided and rubbed with the friction bulge I11 again, 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 arc extinguishing plate 13 is collided 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 rotated under the shaking inertia force, and are rotated under the torsional spring restoring force and the shaking inertia force on the rotating shaft 14 during shaking reset, the fan blades 15 are rotated in a reciprocating manner to generate stirring air flow, and the stirring air flow acts on the electric arc, the electric arc is rapidly cooled under the influence of multidirectional airflow, rapidly elongated under the pulling of the airflow, and rapidly extinguished by matching with the arc extinguishing plate 13, and finally, the moving contact 20 contacts the auxiliary contact 6 again to wait for the next electrifying and communicating of the strong current circuit.

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 improved electric iron-core welding machine is characterized in that an object placing cavity (2) is formed in the shell (1), an iron core (7) is movably sleeved at one end of the object placing cavity (2), a positioning seat (8) is fixedly sleeved at the middle of the object placing 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), an arc extinguishing plate (13) which is uniformly distributed is fixedly connected at the bottom end of the transverse seat (12) and at the top end of the transverse seat (12) above, an armature (16) is movably sleeved at one end of the object placing cavity (2), and friction bulges I (11) which are uniformly distributed are just arranged on one side of the armature (16) are formed by the spring pieces (10), spring (17) has been cup jointed in the protruding outside activity in middle part of armature (16), the lateral surface of armature (16) is equipped with the protruding II (21) of friction of equipartition, protruding II (21) of friction distribute with the protruding I (11) of friction in the crisscross way, the one end middle part fixedly connected with connecting block (18) of armature (16), the dead lever (19) of one side fixedly connected with equipartition of connecting block (18), the top and the bottom fixedly connected with moving contact (20) of dead lever (19).

2. A small current controlled non-polar current contactor as claimed in claim 1, wherein: the arc extinguishing plate is characterized in that the center of one end, away from the arc extinguishing plate (13), of the transverse base (12) 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 to the rotating shaft (14), and the weight of each fan blade (15) is larger than that of the other fan blade (15).

3. A small current controlled non-polar current contactor as claimed in 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).

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

5. A small current controlled non-polar current contactor as claimed in claim 1, wherein: the top and the bottom of positioning seat (8) all set up spacing hole (801) that run through, iron core (7) are the E font, the top and the bottom protrusion position of iron core (7) insert in spacing hole (801), armature (16) are the E font, the arch of armature (16) top and bottom all inserts in spacing hole (801).

6. A small current controlled non-polar current contactor as claimed in 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).

7. 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.

8. A small current controlled non-polar current contactor as claimed in claim 1, wherein: the two pairs of spring pieces (10) are symmetrical by taking the armature (16) as a center.