CN221079917U

CN221079917U - Double-contact parallel connection, low-temperature rise and magnetic system counter-force adjustable clapping type breaker

Info

Publication number: CN221079917U
Application number: CN202322574406.8U
Authority: CN
Inventors: 詹庆超; 刘时胜
Original assignee: Zhejiang Liangxun Electric Co ltd
Current assignee: Zhejiang Liangxun Electric Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-06-04
Anticipated expiration: 2033-09-21

Abstract

The utility model discloses a double-contact parallel connection, low-temperature rise and magnetic system counter-force adjustable clapping type circuit breaker which comprises a counter-force spring, an operating mechanism system, a fixed contact, a moving contact, a magnetic tripping system, a base and a cover body, wherein the cover body can be opened or closed with the base, the operating mechanism system is arranged on the base, the operating mechanism system comprises an operating handle, a connecting rod and a locking piece, one end of the connecting rod is connected with the operating handle, the other end of the connecting rod is connected with the base, the locking piece is rotationally connected with the base, the magnetic tripping system comprises a magnetic yoke and an armature, the magnetic yoke is arranged on the base, the armature is fixedly connected with the base, the magnetic tripping system further comprises a counter-force spring hanger, the counter-force spring hanger is arranged on the base, one end of the counter-force spring hanger is connected with the counter-force spring, the other end of the counter-force spring hanger is connected with the armature, the fixed contact comprises a connecting part, an arc part, a silver point and a Z-shaped part, and the Z-shaped part is a Z-shaped metal sheet.

Description

Double-contact parallel connection, low-temperature rise and magnetic system counter-force adjustable clapping type breaker

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a double-contact parallel circuit breaker with adjustable reaction force of a low-temperature rise magnetic system.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and capable of closing, carrying and opening a current + under abnormal circuit conditions for a prescribed time. The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the application range, the division of high-voltage and low-voltage boundaries is fuzzy, the circuit breaker is generally called a high-voltage electric appliance with the voltage of more than 3kV, the circuit breaker can be used for distributing electric energy, an asynchronous motor is not frequently started, the power supply circuit, the motor and the like are protected, when serious overload, short circuit, undervoltage and other faults occur, the circuit can be automatically cut off, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an overheat relay and the like.

The miniature circuit breaker is widely applied to terminal electric circuits and generally has two functions of short-circuit protection and thermal protection, wherein the short-circuit protection is completed by an electromagnetic instantaneous release and mainly has damping type, solenoid type electromagnetic type, clapping electromagnetic type and other structures, the thermal protection mainly adopts a bimetallic strip release mode, the 80A-125A products, the 6-63A products and the shells of the products in the current market have large size difference, the existing solenoid electromagnetic circuit breaker has high cost, large copper consumption, complex manufacturing process, high cost, welding points, relatively large resistance value and high temperature rise; in addition, the existing miniature circuit breaker is generally 63A shell frame with one size, 125A shell frame with another size, two circuit breaker products with different sizes, multiple welding points, single-action contact, large heat generation of the circuit breaker, temperature rise and the shell frame size of 125A is larger than that of 63A shell frame, so that the cost of 125A shell frame is higher than that of 63A shell frame.

Therefore, the utility model provides the breaker with the double contacts connected in parallel, low temperature rise and adjustable magnetic system counter force, which has less welding spots and low temperature rise.

Disclosure of utility model

In view of the above-mentioned problems with the background art, the present utility model has as its object: the circuit breaker aims at providing a breaker with double contacts connected in parallel, low temperature rise and adjustable magnetic system counter force so as to solve most or all technical problems in the background technology.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

The utility model provides a double contact connects in parallel, low temperature rise, magnetic system counter force is adjustable claps formula circuit breaker, includes counter force spring, control mechanism system, static contact, moving contact, magnetism tripping system, base and lid, the lid can with the base is opened or is covered, control mechanism system set up in on the base, control mechanism system includes operating handle, connecting rod and hasp piece, connecting rod one end with operating handle is connected, the other end with the base is connected, the hasp piece with the base rotates to be connected, magnetism tripping system includes yoke and armature, the yoke set up in on the base, armature with base fixed connection still includes counter force spring and hangs, counter force spring hang set up in on the base, counter force spring one end with counter force spring hangs to be connected, the other end with armature is connected, the static contact comprises a connecting part, an arc part, a silver point and a Z-shaped part, wherein the Z-shaped part is a Z-shaped metal sheet, one end of the connecting part is connected with the Z-shaped part, the other end of the Z-shaped part is connected with the arc part, one end of the arc part is inclined leftwards and the other end of the arc part is bent rightwards and downwards, the silver point is arranged on the outer side of the arc part, the arc part on the lower side of the silver point is inclined leftwards and downwards, a plurality of arc extinguishing chambers are arranged at the bottom of the magnetic yoke, the arc extinguishing chambers are connected with the static contact, the armature is used for enabling the armature to be downwards adsorbed when the circuit breaker is short-circuited, the end part of the armature is abutted to the locking piece in the downwards adsorption process to reset the operating handle, the static contact further comprises an arc striking plate, an arc-isolating plate, a magnetic conducting sheet, a wire inlet end and a wire outlet end, wherein the arc striking plate is in an annular structure, one end of the arc striking plate is connected with the arc extinguishing chambers, the other end with the inlet wire end is connected, the outlet wire end with the static contact is connected, be equipped with a plurality of arcs on the flash barrier and lead to the passageway, the arc leads to the passageway be used for making the magnetic sheet with form the clearance between the flash barrier, the magnetic sheet with one end face butt of flash barrier, the moving contact with the base rotates to be connected, the moving contact tip is the form of buckling, explosion chamber one side is equipped with a plurality of electric arc air current passageway of groups, the screw department of outlet wire end is equipped with electric arc exhaust hole, moving contact one end is connected with the moving contact support, moving contact support department is equipped with the strengthening rib.

Further limited, still include the second reaction spring hang, the second reaction spring hang set up in reaction spring hangs the upside, reaction spring one end with the second reaction spring hangs to be connected, the other end with armature is connected.

Further defined, the bottom of the Z-shaped portion is provided with a bump.

Further defined, the arc gas flow channels are provided with 3 groups, and 3 arc extinguishing chambers are arranged corresponding to 1 group of arc gas flow channels.

The arc gas flow channel is characterized by further comprising a second arc gas vent and a third arc gas vent, wherein the second arc gas vent and the third arc gas vent are both arranged at the lower left corner of the base, the second arc gas vent is arranged relative to the arc gas flow channel, and the third arc gas vent is arranged relative to the outlet end.

Further defined, the dimensions of the base and cover are 78.5mm in length, 47.5mm in height and 18mm in width.

Further defined, the current specification coverage of the circuit breaker is 20A-125A.

The utility model has the beneficial effects that:

1. the magnetic system and the thermal system are reasonably distributed, the overall dimension of the circuit breaker is reduced, a user can conveniently use the circuit breaker product in a smaller space, and meanwhile, the cost is saved.

2. The space of compression explosion chamber for the explosion chamber reduces, increases the exhaust hole in explosion chamber outlet end screw department, still sets up multiunit electric arc air current passageway on the explosion chamber, makes the exhaust unobstructed, is favorable to electric arc introduction explosion chamber to extinguish.

3. Adding air blowing, arranging a reinforcing rib at the moving contact support, sealing the position above the moving contact and the fixed contact by matching with the cover body, and sealing the right base of the moving contact and the cover body, so as to block the trend of air flow and prevent the damage of electric arc to double-metal; and the magnetic blow-off is increased, the ring-shaped pattern of the arc striking sheet is enhanced, and the arc is attracted to the arc extinguishing chamber.

4. The clapping structure is adopted, so that the space is saved, the welding point is reduced, and the temperature rise of the circuit breaker is low; the counter force is adjustable, the upper side of the magnetic tripping system reserves the suspension position of the counter force spring, and the same spring can be made into different instantaneous multiples.

5. The arc portion one end of static contact is left upper slope form, and the other end is right lower bend form, does benefit to the welding electrode and gives way, makes things convenient for silver spot welding on the static contact to transfer the arc to the explosion chamber more easily, silver point set up in the arc portion outside, the arc portion of silver point downside is left lower slope form, makes the electric arc trend more reasonable, and the striking board makes annular structure, can strengthen the magnetic blow striking, and the favorable breaking test is passed through, and in addition, the arc-stop board is made into the arc and leads to, forms the clearance with the magnetic conduction piece between, does benefit to the air blow arc extinction.

6. The moving contact is bent and tightly combined, so that the distance between the moving contact and the fixed contact is reduced, the electric arc is narrowed, the electric arc voltage can be increased, the passing of breaking test is facilitated, the size width of silver points of the fixed contact is correspondingly reduced, and the loss of copper pieces of the silver points is reduced.

7. Under the condition that the width and the height of the circuit breaker are unchanged, the two sides of the length are respectively shortened by 3mm, and the volume of the circuit breaker is reduced by about eight percent. The current specification coverage range of the circuit breaker is 20A-125A, so that the sizes of the circuit breaker 80A-125A and the circuit breaker 6-63A are equal, and the problem that the appearance sizes of the large-specification circuit breaker and the small-specification circuit breaker are different is solved.

8. The utility model has less internal welding points and low temperature rise, improves the temperature rise performance of the circuit breaker, reduces the raw material cost of the circuit breaker, and saves the installation and use space of the circuit breaker.

Drawings

The utility model can be further illustrated by means of non-limiting examples given in the accompanying drawings;

FIG. 1 is a top view of the open circuit of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

FIG. 2 is a top view of the closing contacts of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

FIG. 3 is a top view of the closing state of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

FIG. 4 is a top view of the trip status of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

FIG. 5 is an enlarged view of a control mechanism system 2 of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

FIG. 6 is a top view of the base 5 of an embodiment of a dual contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

Fig. 7 is a top view of a cover 6 of an embodiment of a dual-contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model;

Fig. 8 is a front view of a fixed contact 9 of an embodiment of a double-contact parallel, low-temperature-rise and magnetic system reaction force adjustable clapping type circuit breaker of the utility model;

Fig. 9 is a schematic structural diagram of a fixed contact 9 of an embodiment of a dual-contact parallel-connection, low-temperature-rise and magnetic system reaction force adjustable clapping type circuit breaker;

Fig. 10 is a front view of a control mechanism system 2 of an embodiment of a double-contact parallel, low temperature rise, magnetic system reaction force adjustable clapping circuit breaker of the present utility model.

The main reference numerals are as follows: the magnetic tripping device comprises an operating handle 1, an operating mechanism system 2, a magnetic tripping system 3, an arc extinguishing chamber 4, a base 5, a cover 6, an arc striking plate 8, a fixed contact 9, a moving contact 10, an inlet wire end 11, an outlet wire end 12, an arc exhaust hole 13A, a second arc exhaust hole 13B, a third arc exhaust hole 13C, a counter-force spring 14, a magnetic yoke 15, an armature 16, a connecting rod 17, a locking piece 18, a counter-force spring hanger 19, a second counter-force spring hanger 19A, a convex point 20, a connecting part 21, an arc-shaped part 22, a Z-shaped part 23, a silver point 24, an arc shielding plate 25, a magnetic conducting sheet 26 and an arc airflow channel 27.

Detailed Description

In order that those skilled in the art will better understand the present utility model, the following technical scheme of the present utility model will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 to 10, the breaker with adjustable double contacts connected in parallel, low temperature rise and magnetic system reaction force according to the utility model comprises a reaction spring 14, an operating mechanism system 2, a fixed contact 9, a moving contact 10, a magnetic tripping system, a base 5 and a cover 6, wherein the cover 6 can be opened or closed with the base 5, and is characterized in that: the control mechanism system 2 is arranged on the base 5, the control mechanism system 2 comprises an operation handle 1, a connecting rod 17 and a locking piece 18, one end of the connecting rod 17 is connected with the operation handle 1, the other end is connected with the base 5, the locking piece 18 is rotationally connected with the base 5, the magnetic tripping system comprises a magnetic yoke 15 and an armature 16, the magnetic yoke 15 is arranged on the base 5, the armature 16 is fixedly connected with the base 5, 19 is hung by a counter-force spring, 19 is arranged on the base 5, one end of the counter-force spring 14 is connected with the counter-force spring hung 19, the other end is connected with the armature 16, the static contact 9 comprises a connecting part 21, an arc-shaped part 22, silver points 24 and a Z-shaped part 23, the Z-shaped part 23 is a Z-shaped metal sheet, one end of the connecting part 21 is connected with the Z-shaped part 23, the other end is connected with the arc-shaped part 22, one end of the arc-shaped part 22 is obliquely arranged left upwards, the other end is obliquely bent right downwards, the silver points 24 are arranged outside the arc-shaped part 22, the arc-shaped part 22 at the lower side of the silver point 24 is in a shape of tilting left and down, the bottom of the magnetic yoke 15 is provided with a plurality of arc-extinguishing chambers 4, the arc-extinguishing chambers 4 are connected with the fixed contact 9, the armature 16 is used for enabling the armature 16 to be downwards absorbed by a magnetic field when the circuit breaker is in short circuit, in the downward absorption process of the armature 16, the end part of the armature 16 is abutted against the locking piece 18 to reset the operating handle 1, the device further comprises an arc striking plate 8, an arc-isolating plate 25, a magnetic conducting sheet 26, an incoming line end 11 and an outgoing line end 12, wherein the arc striking plate 8 is in an annular structure, one end of the arc striking plate 8 is connected with the arc-extinguishing chambers 4, the other end is connected with the incoming line end 11, the outgoing line end 12 is connected with the fixed contact 9, a plurality of arc-shaped conducting paths are arranged on the arc-isolating plate 25 and are used for enabling gaps to be formed between the magnetic conducting sheet 26 and the arc-isolating plate 25, the magnetic conducting sheet 26 is abutted against one end surface of the arc-isolating plate 25, the moving contact 10 is in rotary connection with the base 5, the end part of the moving contact 10 is in a bent shape, one side of the arc extinguishing chamber 4 is provided with a plurality of groups of arc airflow channels 27, the screw part of the wire outlet end 12 is provided with an arc exhaust hole 13A, one end of the moving contact 10 is connected with a moving contact bracket, and the moving contact bracket is provided with a reinforcing rib.

The utility model adjusts the size of the shell, the size of the arc extinguish chamber 4, the shape of the movable contact 10 and the static contact 9, the forward movement of the closing matching position, the reasonable layout of the thermal protection system and the magnetic system of the breaker, the soft connection welding position and the like, shortens the two sides of the length by 3mm respectively under the condition of unchanged width and height of the breaker, reduces the volume by about eight percent, ensures that the size of the current specification coverage range of the breaker is 20A-125A, ensures that the size of the 80A-125A breaker is equal to that of the 6-63A breaker, solves the problem of different external sizes of the large-specification breaker and the small-specification breaker, ensures that one end of the arc-shaped part 22 of the static contact 9 is inclined leftwards and the other end is bent rightwards, is favorable for yielding the welding electrode, the silver points 24 on the fixed contact 9 are convenient to weld, the electric arc is more easily transferred into the arc extinguishing chamber 4, the silver points 24 are arranged on the outer side of the arc-shaped part 22, the arc-shaped part 22 on the lower side of the silver points 24 is inclined leftwards and downwards, so that the trend of the electric arc is more reasonable, the arc striking plate 8 is made into an annular structure, the magnetic blowing arc striking can be enhanced, the breaking test is facilitated, in addition, the arc striking plate 25 is made into an arc-shaped conducting plate, a gap is formed between the arc striking plate and a magnetic conducting sheet, the air blowing arc extinguishing is facilitated, the moving contact is bent and tightly pressed, the distance between the moving contact and the fixed contact is reduced, the electric arc is narrowed, the electric arc voltage can be promoted, the passing of the breaking test is facilitated, the size width of the silver points of the matched fixed contact is correspondingly reduced, and the loss of a silver point copper piece is reduced; meanwhile, the internal welding points are few, the temperature rise is low, the temperature rise performance of the circuit breaker is improved, the size is reduced, the raw material cost of the circuit breaker is reduced, and the installation and use space of the circuit breaker is saved.

Preferably, the reaction force adjusting device further comprises a second reaction force spring hanger 19A, wherein the second reaction force spring hanger 19A is arranged on the upper side of the reaction force spring hanger 19, one end of the reaction force spring 14 is connected with the second reaction force spring hanger 19A, and the other end of the reaction force spring 14 is connected with the armature 16.

Preferably, the bottom of the Z-shaped part 23 is provided with a convex point 20, and the convex point 20 is arranged to facilitate the positioning of the magnetic yoke 15 in the central position.

Preferably, the arc airflow channels 27 are provided with 3 groups, and 3 arc extinguishing chambers 4 are correspondingly arranged with 1 group of arc airflow channels 27, so that the exhaust is smooth due to the structural design, and the arc introduction and extinguishing of the arc extinguishing chambers are facilitated.

Preferably, the electric arc extinguishing device further comprises a second electric arc exhaust hole 13B and a third electric arc exhaust hole 13C, wherein the second electric arc exhaust hole 13B and the third electric arc exhaust hole 13C are formed in the lower left corner of the base 5, the second electric arc exhaust hole 13B is arranged relative to the electric arc air flow channel 27, the third electric arc exhaust hole 13C is arranged relative to the wire outlet end 12, and the plurality of electric arc exhaust holes are beneficial to improving the exhaust efficiency so that the electric arc can be extinguished more quickly.

Preferably, the dimensions of the base 5 and the cover 6 are 78.5mm in length, 47.5mm in height and 18mm in width, and compared with the conventional circuit breaker, the circuit breaker with the structural design has the dimensions of 86mm in length and 49.5mm in height, so that the external dimensions of the circuit breaker are reduced, a user can use the circuit breaker in a smaller space conveniently, and meanwhile, the cost is saved.

Preferably, the current specification of the circuit breaker covers 20A-125A.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims of this utility model, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the utility model disclosed herein.

Claims

1. The utility model provides a double contact connects in parallel, low temperature rise, adjustable clapping of magnetic system counter-force closes circuit breaker, includes counter-force spring (14), controls mechanism system (2), stationary contact (9), moving contact (10), magnetism tripping system, base (5) and lid (6), lid (6) can with base (5) are opened or are closed, its characterized in that: the magnetic tripping system comprises a magnetic yoke (15) and an armature (16), the magnetic yoke (15) is arranged on the base (5), the armature (16) is fixedly connected with the base (5), the magnetic tripping system further comprises a counter spring hanger (19), the counter spring hanger (19) is arranged on the base (5), one end of the counter spring (14) is connected with the counter spring hanger (19), the other end of the counter spring is connected with the armature (16), the fixed contact (9) comprises a connecting part (21), an arc-shaped part (22), a silver point (24) and a Z-shaped part (23), the Z-shaped part (23) is a Z-shaped metal sheet, the armature (16) is fixedly connected with the base (5), the magnetic tripping system further comprises a counter spring hanger (19), one end of the counter spring (14) is connected with the counter spring hanger (19), the other end of the counter spring hanger is connected with the armature (16), the fixed contact (9) comprises a connecting part (21), an arc-shaped part (22), a silver point (24) and a Z-shaped part (23), the Z-shaped part (23) is in a shape, the connecting part (22) is in a shape of a right, the shape is in which the shape of a curve, and the other end is arranged at one end of the arc-shaped part (22) which is in a curve, the arc-shaped part (22) at the lower side of the silver point (24) is inclined leftwards and downwards, the bottom of the magnetic yoke (15) is provided with a plurality of arc-extinguishing chambers (4), the arc-extinguishing chambers (4) are connected with the fixed contact (9), the armature (16) is used for being downwards adsorbed by the armature (16) caused by a magnetic field when the circuit breaker is in short circuit, in the downward adsorption process of the armature (16), the end part of the armature (16) is abutted to the locking piece (18) to reset the operating handle (1), the magnetic yoke further comprises an arc striking plate (8), an arc-isolating plate (25), a magnetic conducting sheet (26), a wire inlet end (11) and a wire outlet end (12), the arc striking plate (8) is in an annular structure, one end of the arc striking plate (8) is connected with the arc-extinguishing chambers (4), the other end of the arc-extinguishing chamber is connected with the wire inlet end (11), the wire outlet end (12) is connected with the fixed contact (9), a plurality of arc-shaped conducting paths are arranged on the arc-shaped conducting paths, the arc-shaped conducting paths are used for enabling the arc-shaped conducting paths (16) to abut against the movable contact (25) to form a rotary magnetic isolating sheet (10) with one end part (25), the arc extinguishing chamber is characterized in that a plurality of groups of arc airflow channels (27) are formed in one side of the arc extinguishing chamber (4), arc exhaust holes (13A) are formed in screw positions of the wire outlet ends (12), one end of the moving contact (10) is connected with a moving contact support, and reinforcing ribs are arranged at the moving contact support.

2. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the device further comprises a second counter-force spring hanger (19A), wherein the second counter-force spring hanger (19A) is arranged on the upper side of the counter-force spring hanger (19), one end of the counter-force spring (14) is connected with the second counter-force spring hanger (19A), and the other end of the counter-force spring is connected with the armature (16).

3. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the bottom of the Z-shaped part (23) is provided with a salient point (20).

4. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the arc gas flow channels (27) are provided with 3 groups, and 3 arc extinguishing chambers (4) are arranged corresponding to 1 group of arc gas flow channels (27).

5. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the electric arc gas discharge device further comprises a second electric arc gas discharge hole (13B) and a third electric arc gas discharge hole (13C), wherein the second electric arc gas discharge hole (13B) and the third electric arc gas discharge hole (13C) are formed in the lower left corner of the base (5), the second electric arc gas discharge hole (13B) is arranged relative to the electric arc gas flow channel (27), and the third electric arc gas discharge hole (13C) is arranged relative to the wire outlet end (12).

6. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the dimensions of the base (5) and the cover (6) are 78.5mm in length, 47.5mm in height and 18mm in width.

7. The double-contact parallel, low-temperature-rise and magnetic system counter-force adjustable clapping circuit breaker according to claim 1, wherein the circuit breaker is characterized in that: the current specification coverage of the circuit breaker is 20A-125A.