CN210956560U

CN210956560U - Arc extinguishing-free low-voltage direct current contactor

Info

Publication number: CN210956560U
Application number: CN201922365685.0U
Authority: CN
Inventors: 瓦磊; 冯庆武
Original assignee: Jinquan Electric Dongguan Co ltd
Current assignee: Jinquan Electric Dongguan Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-07-07
Anticipated expiration: 2029-12-25

Abstract

The utility model belongs to the technical field of contactors, in particular to a non-arc-quenching low-voltage direct current contactor, which comprises a contactor body and a protective cover fixed on the top of the contactor body, wherein a controller used for controlling a circuit is arranged in the contactor body, a coil joint and a main contact joint used for communicating the circuit are fixedly connected on the contactor body, the protective cover comprises a fixed frame and a clamping block, and a clamping cavity matched with the contactor body is arranged in the clamping block; prevent dust and grease and current contact surface contact, the phenomenon that leads to coil outage back iron core not release lets the contactor can not receive external environment influence, can normally work, fix the outer wall at coil joint and main contact joint by first spliced pole and second spliced pole block, increased the polar surface area that connects, reduce collision stress and coefficient of friction, prevent that coil joint and main contact joint from wearing and tearing in long-time use, improve the life that can low pressure direct current contactor.

Description

Arc extinguishing-free low-voltage direct current contactor

Technical Field

The utility model belongs to the technical field of the contactor, concretely relates to low pressure direct current contactor of no arc extinguishing formula.

Background

The contactor is an electric appliance for connecting and disconnecting a main AC/DC circuit and a large-capacity control circuit frequently and remotely, the main control object is a motor, and other electric loads such as an electric heater, a lighting lamp, an electric welding machine, a capacitor bank and the like can be controlled, the contactor is a voltage capable of ensuring the normal operation of the electric appliance under specified conditions, the relation between the on-off capacity of the product is large, usually, the maximum operating voltage is a rated insulation voltage, and the electric clearance and the creepage distance of the electric appliance are determined according to the voltage, the normal rated operating voltage of one contactor is determined, corresponding rated operating current is listed at the same time, when a low-voltage DC contactor is used in a low-current safety place, no arcing will occur.

When the existing low-voltage direct-current contactor is used, the residual magnetism inside the contactor is too large and the reaction force is too small because of viscous grease and dust on the surface of a polar plate, so that an iron core is not released after a coil is powered off, and the direct-current contactor breaks down.

Accordingly, those skilled in the art have provided a non-arcing low voltage dc contactor to solve the problems set forth in the background art.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a low pressure direct current contactor of no arc extinguishing formula has the characteristics of protecting current contact surface.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low pressure direct current contactor of no arc extinguishing formula, includes the ware body and fixes the protection casing at its top, the inside of ware body has the controller that is used for control circuit, fixedly connected with is used for the coil joint and the main contact joint of intercommunication circuit on the ware body, the protection casing includes fixed frame and fixture block, fixed frame integrated into one piece is in the right side of fixture block, the inside of fixture block have with ware body matched with block chamber, the fixture block passes through block chamber block is fixed at the top of ware body, the both sides of fixture block all are equipped with fixing bolt, fixing bolt runs through the fixture block with ware body fixed connection, the equal fixedly connected with first connector post in both ends of fixture block, first connector post runs through the fixture block and extends to inside, just first connector post block is fixed at the top of coil joint, the top of fixture block fixedly connected with second spliced pole, the second spliced pole runs through the fixture block and extends to its inside, just the second spliced pole block is fixed the top that the main contact connects.

Preferably, one end of the fixing frame, which is far away from the clamping block, is fixedly connected with a cooling fan, and the cooling fan is electrically connected with an external power supply.

Preferably, a cavity is formed in the fixed frame, and the heat dissipation fan is communicated with the clamping cavity through the cavity.

Preferably, a first clamping groove matched with the coil connector is formed in the first connecting column, and the first connecting column is fixed to the top of the coil connector through the first clamping groove in a clamping mode.

Preferably, a second clamping groove matched with the main contact joint is formed in the second connecting column, and the second connecting column is clamped and fixed at the top of the main contact joint through the second clamping groove.

Preferably, the first connecting column and the second connecting column are both made of copper.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses well fixture block passes through block chamber block to be fixed at the top of the ware body, when using, fix the ware body block in the block chamber, protect the electric current contact surface through the fixture block, prevent dust and grease and electric current contact surface contact, it is too big because of remanence to have avoided the contactor inside, the reaction force is little, and the phenomenon that the iron core does not release after the coil outage appears, let the contactor can not receive the external environment influence, can normally work, and simultaneously, fix the outer wall at coil joint and main contact joint by first spliced pole and second spliced pole block, the pole face area who connects has increased, reduce collision stress and coefficient of friction, prevent that coil joint and main contact joint from wearing and tearing in long-time use, improve the life that can low voltage direct current contactor.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the protective cover of the present invention;

fig. 3 is a schematic structural view of the middle fixing frame and the heat dissipation fan of the present invention;

fig. 4 is a schematic structural view of a first connecting post according to the present invention;

fig. 5 is a schematic structural view of the second connecting column of the present invention.

In the figure: 1. a body; 11. a coil joint; 12. a main contact terminal; 2. a protective cover; 21. a fixing frame; 211. a cavity; 22. a clamping block; 221. a clamping cavity; 23. fixing the bolt; 24. a first connecting column; 241. a first card slot; 25. a second connecting column; 251. a second card slot; 26. a heat dissipation fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: a non-arc extinguishing type low-voltage direct current contactor comprises a contactor body 1 and a protective cover 2 fixed on the top of the contactor body, wherein a controller used for controlling a circuit is arranged in the contactor body 1, a coil joint 11 used for communicating the circuit and a main contact joint 12 are fixedly connected on the contactor body 1, the protective cover 2 comprises a fixing frame 21 and a fixture block 22, the fixing frame 21 is integrally formed on the right side of the fixture block 22, a clamping cavity 221 matched with the contactor body 1 is arranged in the fixture block 22, the fixture block 22 is clamped and fixed on the top of the contactor body 1 through the clamping cavity 221, fixing bolts 23 are arranged on two sides of the fixture block 22, the fixing bolts 23 penetrate through the fixture block 22 and are fixedly connected with the contactor body 1, first connecting columns 24 are fixedly connected at two ends of the fixture block 22, the first connecting columns 24 penetrate through the fixture block 22 and extend to the interior of the fixture block, the first connecting columns 24 are clamped and fixed, the second connecting column 25 penetrates through the fixture block 22 and extends into the fixture block, and the second connecting column 25 is fixed on the top of the main contact joint 12 in a clamping manner.

In this embodiment: the fixing frame 21 is integrally formed at the right side of the fixture block 22, the fixture block 22 is internally provided with a clamping cavity 221 matched with the device body 1, the fixture block 22 is clamped and fixed at the top of the device body 1 through the clamping cavity 221, the device body 1 is clamped and fixed in the clamping cavity 221, a current contact surface is protected through the fixture block 22, dust and grease are prevented from contacting with the current contact surface, the phenomenon that an iron core is not released after a coil is powered off due to overlarge residual magnetism and small reaction force in the interior of a contactor is avoided, the contactor cannot be influenced by external environment and can normally work, the two sides of the fixture block 22 are respectively provided with a fixing bolt 23, the fixing bolts 23 penetrate through the fixture block 22 and are fixedly connected with the device body 1, the protective cover 2 is fixed on the device body 1 through the fixing bolts 23 so as to protect a contact joint, the two ends of the fixture block 22 are respectively and fixedly connected with a first, and first spliced pole 24 block is fixed at the top of coil joint 11, the top fixedly connected with second spliced pole 25 of fixture block 22, second spliced pole 25 runs through fixture block 22 and extends to its inside, and second spliced pole 25 block is fixed at the top of main contact joint 12, because the material of first spliced pole 24 and second spliced pole 25 is copper, have the electric conduction effect, fix the outer wall at coil joint 11 and main contact joint 12 by first spliced pole 24 and second spliced pole 25 block, the polar surface area that has increased the contact joint, protect the electric shock joint simultaneously, reduce collision stress and coefficient of friction, prevent that coil joint 11 and main contact joint 12 from wearing and tearing in long-time use, improve the life that can low pressure direct current contactor.

In fig. 1, 4 and 5: when in use, a worker clamps and fixes the device body 1 in the clamping cavity 221, simultaneously clamps and fixes the coil joint 11 and the main contact joint 12 into the first clamping groove 241 and the second clamping groove 251 respectively, twists the fixing bolt 23 to fix the protective cover 2 on the device body 1, protects the current contact surface through the clamping block 22, prevents dust and grease from contacting the current contact surface, avoids the phenomenon that an iron core is not released after the coil is powered off due to overlarge residual magnetism and small reaction force in the interior of the contactor, enables the contactor not to be influenced by the external environment, can normally work, has a conductive effect because the first connecting column 24 and the second connecting column 25 are made of copper, is clamped and fixed on the outer walls of the coil joint 11 and the main contact joint 12 through the first connecting column 24 and the second connecting column 25, increases the polar surface area of the contact joint, and protects the electric shock joint at the same time, the impact stress and the friction coefficient are reduced, the coil joint 11 and the main contact joint 12 are prevented from being worn in long-time use, the service life of the low-voltage direct-current contactor is prolonged, meanwhile, because the cavity 211 is communicated with the clamping cavity 221, the heat dissipation fan 26 works to drive air in the cavity 211 and the clamping cavity 221 to flow, the device body 1 in the clamping cavity 221 is dissipated, the over-high temperature of the electric-shock joint is prevented, current overload is caused, and the using effect is improved.

In fig. 2 and 3: the device body 1 is clamped and fixed in the clamping cavity 221, and simultaneously, after the coil joint 11 and the main contact joint 12 are respectively clamped and arranged in the first clamping groove 241 and the second clamping groove 251, the fixing bolt 23 is screwed to fix the protective cover 2 on the device body 1, the current contact surface is protected by the clamping block 22, so that dust and grease are prevented from contacting with the current contact surface, the phenomenon that an iron core is not released after the coil is powered off due to overlarge residual magnetism and small reaction force in the interior of the contactor is avoided, the contactor can not be influenced by the external environment and can normally work, as the first connecting column 24 and the second connecting column 25 are made of copper, the contactor has a conductive function, the first connecting column 24 and the second connecting column 25 are clamped and fixed on the outer walls of the coil joint 11 and the main contact joint 12, the polar surface area of the contact joint is increased, the electric shock joint is protected, and the collision stress and the friction coefficient are reduced, the coil connector 11 and the main contact connector 12 are prevented from being worn in long-time use, the service life of the low-voltage direct-current contactor is prolonged, meanwhile, the cavity 211 is communicated with the clamping cavity 221, the heat dissipation fan 26 works to drive air in the cavity 211 and the clamping cavity 221 to flow, the device body 1 in the clamping cavity 221 is cooled, the electric shock connector is prevented from being overloaded due to overhigh temperature, and the using effect is improved.

The utility model discloses a theory of operation and use flow: when in use, a worker clamps and fixes the device body 1 in the clamping cavity 221, simultaneously clamps and fixes the coil joint 11 and the main contact joint 12 into the first clamping groove 241 and the second clamping groove 251 respectively, twists the fixing bolt 23 to fix the protective cover 2 on the device body 1, protects the current contact surface through the clamping block 22, prevents dust and grease from contacting the current contact surface, avoids the phenomenon that an iron core is not released after the coil is powered off due to overlarge residual magnetism and small reaction force in the interior of the contactor, enables the contactor not to be influenced by the external environment, can normally work, has a conductive effect because the first connecting column 24 and the second connecting column 25 are made of copper, is clamped and fixed on the outer walls of the coil joint 11 and the main contact joint 12 through the first connecting column 24 and the second connecting column 25, increases the polar surface area of the contact joint, and protects the electric shock joint at the same time, the impact stress and the friction coefficient are reduced, the coil joint 11 and the main contact joint 12 are prevented from being worn in long-time use, the service life of the low-voltage direct-current contactor is prolonged, meanwhile, because the cavity 211 is communicated with the clamping cavity 221, the heat dissipation fan 26 works to drive air in the cavity 211 and the clamping cavity 221 to flow, the device body 1 in the clamping cavity 221 is dissipated, the over-high temperature of the electric-shock joint is prevented, current overload is caused, and the using effect is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a low pressure direct current contactor of no arc extinguishing formula, includes the ware body (1) and fixes protection casing (2) at its top, the inside of ware body (1) has the controller that is used for control circuit, fixedly connected with is used for the coil joint (11) and the main contact joint (12) of intercommunication circuit on the ware body (1), its characterized in that: the protection casing (2) is including fixed frame (21) and fixture block (22), fixed frame (21) integrated into one piece is in the right side of fixture block (22), the inside of fixture block (22) have with the ware body (1) matched with block chamber (221), fixture block (22) are passed through block chamber (221) block is fixed the top of the ware body (1), the both sides of fixture block (22) all are equipped with fixing bolt (23), fixing bolt (23) run through fixture block (22) with the ware body (1) fixed connection, the equal fixedly connected with first spliced pole (24) in both ends of fixture block (22), first spliced pole (24) run through fixture block (22) and extend to its inside, just first spliced pole (24) block is fixed the top of coil joint (11), the top fixedly connected with second spliced pole (25) of fixture block (22), the second connecting column (25) penetrates through the clamping block (22) and extends into the clamping block, and the second connecting column (25) is clamped and fixed to the top of the main contact joint (12).

2. A non-arcing low-voltage dc contactor according to claim 1, characterized in that: one end, far away from the fixture block (22), of the fixing frame (21) is fixedly connected with a heat dissipation fan (26), and the heat dissipation fan (26) is electrically connected with an external power supply.

3. A non-arcing low-voltage dc contactor according to claim 2, characterized in that: the fixing frame (21) is internally provided with a cavity (211), and the heat radiation fan (26) is communicated with the clamping cavity (221) through the cavity (211).

4. A non-arcing low-voltage dc contactor according to claim 1, characterized in that: the first connecting column (24) is internally provided with a first clamping groove (241) matched with the coil joint (11), and the first connecting column (24) is clamped and fixed at the top of the coil joint (11) through the first clamping groove (241).

5. A non-arcing low-voltage dc contactor according to claim 1, characterized in that: a second clamping groove (251) matched with the main contact joint (12) is formed in the second connecting column (25), and the second connecting column (25) is clamped and fixed at the top of the main contact joint (12) through the second clamping groove (251).

6. A non-arcing low-voltage dc contactor according to claim 1, characterized in that: the first connecting column (24) and the second connecting column (25) are both made of copper.