CN110634718A

CN110634718A - Circuit breaker for low-voltage switch cabinet

Info

Publication number: CN110634718A
Application number: CN201910780669.XA
Authority: CN
Inventors: 潘清云
Original assignee: Nanan Dong Feng Machinery Technology Co Ltd
Current assignee: Shandong Deyuan Electric Power Technology Co.,Ltd.
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2019-12-31
Anticipated expiration: 2039-08-22
Also published as: CN110634718B

Abstract

The invention discloses a circuit breaker for a low-voltage switch cabinet, which structurally comprises a cover, a telescopic rail buckle, a trip coil, an operating handle, a contact, an arc extinguish chamber and the like, wherein the trip coil is arranged in the cover horizontally corresponding to the operating handle, the arc extinguish chamber is arranged right above the trip coil, the telescopic rail buckle is arranged right above the arc extinguish chamber, the contact is arranged at the bottom of a coil at the bottom of the trip, the trip coil comprises a first spring, a support rod, a coil strip, a hair increasing device, double clamping rods, armatures and a slide rod, more than two armatures are distributed on the slide rod, and the coil strip is arranged at the head end and the tail end of each armature, the coil strip is clamped, so that the coil strip is prevented from moving back and forth, and the stability of the coil strip in the conductive ring is directly improved.

Description

Circuit breaker for low-voltage switch cabinet

Technical Field

The invention relates to the field of circuit breakers, in particular to a circuit breaker for a low-voltage switch cabinet.

Background

The low-voltage circuit breaker is one of the most common low-voltage electrical appliances, and is also called an air switch, and is a low-voltage switch which can be controlled manually or automatically. The switch is mainly used for switching on and switching off a power supply line, has the functions of overload, short circuit and undervoltage protection, is commonly used in a circuit which is not frequently switched on and switched off, and is often used for controlling circuit breaking and circuit breaker opening and closing failure caused by the fact that an auxiliary contact at a tripping coil is poor in contact in the use process of a low-voltage switch cabinet.

Disclosure of Invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: a circuit breaker for a low-voltage switch cabinet structurally comprises a cover, a telescopic rail buckle, a tripping coil, an operating handle, a contact, an arc extinguish chamber and the like, wherein the tripping coil is installed inside the cover horizontally corresponding to the operating handle;

trip coil includes first spring, branch, coil strip, increases and send out ware, two clamping bars, armature, slide bar, the slide bar distributes and has the armature more than two, and the coil strip is all installed at every armature head and the tail both ends, the coil strip all installs the increase and send out ware near that end of armature, increase and send out ware and armature clearance fit, these increase and send out the ware level and arrange into two, and it is fixed that the increase sends out the ware is tightly cliied by two clamping bars, slide bar one end and branch movable contact, branch and slide bar are mutually perpendicular, first spring is installed respectively for the both ends of slide bar for the axis about branch, two first spring symmetries of each other, first spring end is fixed in the armature side.

As a further optimization of the technical scheme, the double clamping rods are of a rod structure with a transverse opening in the middle.

As a further optimization of the technical scheme, the hair increasing device comprises a movable clamping strip, a fixed rod, a second spring and a conductive ring, wherein the fixed rod is of a U-shaped structure, the conductive ring is attached to a concave position of a U-shaped arc of the fixed rod, the conductive ring is of a structure formed after an oval annular transverse cutting knife is cut, the movable clamping strip is arranged at two horizontal ends of a transverse plane of the conductive ring, the movable clamping strip is parallel to the vertical end of the fixed rod, the movable clamping strip and the conductive ring are fixed by glue, the second spring is horizontally arranged between the fixed rod and the movable clamping strip, and the coil strip is positioned in the middle of the conductive ring after penetrating through the middle of the transverse plane of the conductive ring.

As a further optimization of the technical scheme, the tail end of the movable clamping strip, which is far away from the conductive ring, is bent towards the central axis direction of the conductive ring, and the bending angle is 30-50 degrees.

As a further optimization of the technical scheme, the bending length of the movable holding strip is one half of the total length.

As the further optimization of this technical scheme, the bolt is installed to the position department in the middle of coil strip and conductive ring cross section are positive, the bolt comprises annular base and card strip, annular base wherein one end terminal surface is equipped with the card strip more than two, and these card strips are annular equidistance and distribute, card strip and the perpendicular welding of annular base.

Advantageous effects

Compared with the prior art, the circuit breaker for the low-voltage switch cabinet has the following advantages:

1. according to the invention, the coil strip penetrates through the annular conductive ring, so that the contact area with the armature is increased, and the armature can touch the conductive ring even if the direction of the armature slightly deviates, thereby forming a complete circuit.

2. According to the invention, the double clamping rods and the fixed rod fixing rod are mutually matched, and the coil strip is clamped under the pressure action of the second spring, so that the coil strip is prevented from moving back and forth, and the stability of the coil strip installed in the conductive coil is directly improved.

3. The movable holding strips are designed in size and bent at angles, so that the distance between the bent ends of the two movable holding strips is shortened, the coil strip is easier to fix under the action of the second spring, and the clamping stability of the movable holding strips is further enhanced.

4. According to the invention, through the clamping strip of the plug pin, the gap at the joint of the coil strip and the conductive ring is reduced, the connection tightness of the coil strip and the conductive ring is increased, and poor contact caused by movement due to external force factors is avoided.

5. According to the invention, the double clamping rods are used for clamping the row of hair augers up and down, so that the uniformity of the hair augers is ensured, all armatures can be contacted with the hair augers once the hair augers move, and the problem of disconnection of a control circuit caused by disconnection of a single coil strip is avoided.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic perspective view of a circuit breaker for a low-voltage switchgear according to the present invention.

Fig. 2 is a schematic plan view of the trip coil of the present invention.

Fig. 3 is a schematic cross-sectional view of the hair-increasing device of the present invention.

Fig. 4 is a schematic cross-sectional view of a hair-augmentor of the present invention with a coil strip installed.

Fig. 5 is a schematic perspective view of the latch of the present invention.

FIG. 6 is a top view of the latch of the present invention.

In the figure: the device comprises a cover 1, a telescopic rail buckle 2, a trip coil 3, an operating handle 4, a contact 5, a first spring 3-1, a support rod 3-2, a coil strip 3-3, a hair increasing device 3-4, a double clamping rod 3-5, an armature 3-6, a sliding rod 3-7, a movable clamping strip 3-41, a fixed rod 3-42, a second spring 3-43, a conductive ring 3-44, a plug pin 3-45, an annular base 9 and a clamping strip 8.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Examples

Referring to fig. 1-6, the present invention provides a circuit breaker for a low-voltage switch cabinet, which structurally includes a cover 1, a retractable rail fastener 2, a trip coil 3, an operating handle 4, a contact 5, an arc extinguish chamber, etc., wherein the trip coil 3 is installed inside the cover 1 horizontally corresponding to the operating handle 4, the arc extinguish chamber is arranged right above the trip coil 3, the retractable rail fastener 2 is installed right above the arc extinguish chamber, and the contact 5 is installed at the bottom of the trip bottom coil 3;

the trip coil 3 comprises a first spring 3-1, a support rod 3-2, a coil strip 3-3, a hair increasing device 3-4, a double clamping rod 3-5, an armature 3-6 and a slide rod 3-7, wherein more than two armatures 3-6 are distributed on the slide rod 3-7, the coil strips 3-3 are arranged at the head end and the tail end of each armature 3-6, the hair increasing devices 3-4 are arranged at the ends, close to the armatures 3-6, of the coil strips 3-3, the hair increasing devices 3-4 are movably matched with the armatures 3-6, the hair increasing devices 3-4 are horizontally arranged in two rows, the hair increasing devices 3-4 are tightly clamped and fixed by the double clamping rods 3-5, one end of the slide rod 3-7 is movably contacted with the support rod 3-2, and the support rod 3-2 is vertical to the slide rod 3-7, the two ends of the supporting rod 3-2, which are axial lines relative to the sliding rod 3-7, are respectively provided with a first spring 3-1, the two first springs 3-1 are symmetrical, and the tail ends of the first springs 3-1 are fixed on the side surfaces of the armatures 3-6.

The double clamping rods 3-5 are of a rod structure with a transverse opening in the middle, the hair increasing device 3-4 is tightly fixed, and the problems that the hair increasing device 3-4 moves and the armature 3-6 cannot touch are solved.

The hair increasing device 3-4 is composed of movable clamping strips 3-41, a fixed rod 3-42, second springs 3-43 and conductive rings 3-44, the fixed rod 3-42 is of a U-shaped structure, the conductive rings 3-44 are adhered to U-shaped arc recesses of the fixed rod 3-42, the conductive rings 3-44 are of an oval structure formed after a circular cross cut is performed, the movable clamping strips 3-41 are arranged at two horizontal ends of a cross section of the conductive rings 3-44, the vertical ends of the movable clamping strips 3-41 and the fixed rod 3-42 are mutually parallel, the movable clamping strips 3-41 and the conductive rings 3-44 are fixed by glue, the second springs 3-43 are horizontally arranged between the fixed rod 3-42 and the movable clamping strips 3-41, the coil strips 3-30 penetrate through the middle of the cross section of the conductive rings 3-44 and then are positioned in the middle of the conductive rings 3-44, the contact area between the armature 3-6 and the coil strip 3-3 is increased, the contact area is reduced, and the problem that the armature and the coil strip are staggered with each other occurs.

The tail ends of the movable clamping strips 3-41, far away from the conductive rings 3-44, are bent towards the central axis direction of the conductive rings 3-44, the bending angle is 30-50 degrees, the bending angle of the movable clamping strips 3-41 in the later period is reduced, the movable clamping strips are closer to the coil strips 3-3, gaps are reduced, and the coil strips 3-3 are prevented from moving.

The bending length of the movable holding strips 3-41 is one half of the total length.

The plug pin 3-45 is installed to the positive middle position department of coil strip 3-3 and conductive loop 3-44 cross section, plug pin 3-45 comprises annular base 9 and card strip 8, annular base 9 wherein one end terminal surface is equipped with more than two card strips 8, and these card strips 8 are annular equidistance and distribute, card strip 8 and the perpendicular welding of annular base 9 reduce the space of coil strip 3-3 and conductive loop 3-44 junction, increase the friction between the two, avoid receiving external force factor and take place to remove.

After the short circuit of the circuit breaker is finished, the first spring 3-1 contracts under the action of external force, so that the armature 3-6 is driven to be integrally withdrawn and is reconnected with the coil strip 3-3 to form a complete loop, in order to be accurately contacted, a row of hair augers 3-4 are clamped up and down by the double clamping rods 3-5, the regularity of the hair augers 3-4 is ensured, dislocation and common movement are avoided, then, the coil strip 3-3 is inserted through the annular conductive coils 3-44, the contact area of the coil strip 3-3 and the armature 3-6 is enlarged, if the returned armature 3-6 is slightly deviated in direction, the contact area can also touch the conductive coils 3-44 and is communicated with the coil strip 3-3 to form a complete loop, in order to prevent the inserted coil strip 3-3 from moving, a plug pin 3-45 is inserted at the connection part of the coil strip 3-3 and the conductive coils 3-44, the gap is reduced, the compactness is improved, the conductive ring 3-44 is stabilized, and particularly, the movable clamping strips 3-41 are pressed by the second springs 3-43 to clamp the other ends of the coil strips 3-3, the double points are fixed, the integral balance of the coil strips 3-3 is determined not to deviate, the contact stability is further improved, meanwhile, the bending half and the bending angle of the movable clamping strips 3-41 are designed, the distance between the bending ends of the two movable clamping strips 3-41 is shortened, the coil strips 3-3 are fixed more easily under the action of the second springs 3-43, and the stability of clamping the movable clamping strips 3-41 is further improved.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a circuit breaker for low-voltage switchgear which characterized in that: the structure of the intelligent tripping device comprises a cover (1), a telescopic rail buckle (2), a tripping coil (3), an operating handle (4), a contact (5), an arc extinguish chamber and the like, wherein the tripping coil (3) is installed inside the cover (1) horizontally corresponding to the operating handle (4), the arc extinguish chamber is arranged right above the tripping coil (3), the telescopic rail buckle (2) is installed right above the arc extinguish chamber, and the contact (5) is installed at the bottom of the tripping bottom coil (3);

the trip coil (3) comprises a first spring (3-1), a support rod (3-2), a coil bar (3-3), a hair increasing device (3-4), a double clamping rod (3-5), armatures (3-6) and a slide rod (3-7), more than two armatures (3-6) are distributed on the slide rod (3-7), the coil bar (3-3) is arranged at the head end and the tail end of each armature (3-6), the hair increasing device (3-4) is arranged at the end, close to the armatures (3-6), of the coil bar (3-3), the hair increasing device (3-4) is movably matched with the armatures (3-6), the hair increasing device (3-4) is tightly clamped and fixed by the double clamping rod (3-5), one end of the slide rod (3-7) is movably contacted with the support rod (3-2), the two ends of the support rod (3-2) which are axial relative to the sliding rod (3-7) are respectively provided with a first spring (3-1), and the tail end of the first spring (3-1) is fixed on the side surface of the armature (3-6).

2. The circuit breaker for a low-voltage switchgear cabinet according to claim 1, characterized in that: the double clamping rods (3-5) are of a rod structure with a transverse opening in the middle.

3. The circuit breaker for a low-voltage switchgear cabinet according to claim 2, characterized in that: the hair increasing device (3-4) is composed of movable clamping strips (3-41), a fixed rod (3-42), second springs (3-43) and conductive rings (3-44), the fixed rod (3-42) is of a U-shaped structure, the conductive rings (3-44) are attached to U-shaped arc recesses of the fixed rod (3-42), the movable clamping strips (3-41) are arranged at two horizontal ends of a cross section of the conductive rings (3-44), the second springs (3-43) are horizontally arranged between the fixed rod (3-42) and the movable clamping strips (3-41), and the coil strips (3-30) penetrate through the middle of the cross section of the conductive rings (3-44) and then are located in the middle of the conductive rings (3-44).

4. A circuit breaker for low-voltage switchgear cabinets as claimed in claim 3, characterized in that: the tail ends of the movable clamping strips (3-41) far away from the conductive rings (3-44) are bent towards the central axis direction of the conductive rings (3-44).

5. The circuit breaker for low-voltage switchgear cabinets of claim 3 or 4, characterized in that: the bending length of the movable clamping strips (3-41) is one half of the total length.

6. The circuit breaker for a low-voltage switchgear cabinet according to claim 1, characterized in that: the plug pin (3-45) is installed at the position in the middle of the cross section of the coil strip (3-3) and the conductive coil (3-44), the plug pin (3-45) is composed of an annular base (9) and clamping strips (8), and more than two clamping strips (8) are arranged on the end face of one end of the annular base (9).