CN218647861U

CN218647861U - Direct current breaker

Info

Publication number: CN218647861U
Application number: CN202222122142.8U
Authority: CN
Inventors: 王传国; 顾翔
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2023-03-17
Anticipated expiration: 2032-08-12

Abstract

The utility model discloses a direct current circuit breaker, including the circuit breaker casing, circuit breaker casing upper end be equipped with the protection casing that is used for protecting the circuit breaker casing, the protection casing on fixedly connected with generating line arrange, circuit breaker casing upper end be equipped with the power supply terminal, circuit breaker casing lower extreme be equipped with the load terminal, power supply terminal and load terminal between be equipped with switch module, the other explosion chamber that is used for protecting switch module that is equipped with of switch module, the power supply terminal arrange with generating line respectively and switch module's input electric connection, load terminal and switch module's output electric connection. The utility model overcomes the traditional direct current breaker's that exists among the prior art arc extinguishing ability is relatively poor leads to the lower problem of its security. The utility model has the advantages of lower cost, strong stability, high safety, wide application range and the like.

Description

Direct current breaker

Technical Field

The utility model relates to a circuit breaker structure field, more specifically say, relate to a direct current circuit breaker.

Background

A circuit breaker is a kind of switching device frequently used in life, and there are generally a direct current circuit breaker and an alternating current circuit breaker. Because each period of the alternating current has a natural zero crossing point, the arc is easy to extinguish at the zero crossing point; and the direct current has no zero point, so that the electric arc is difficult to extinguish. In addition, due to the relative position arrangement of the movable contact and the fixed contact, the generated electric arc is difficult to extinguish, and accidents are easily caused.

When the conventional circuit breaker is connected with a bus of a junction box, half of the conventional circuit breaker needs to be connected in a switching way through a plurality of horizontal and vertical conductor connecting pieces, and a plurality of junction points are needed to be added when the conventional circuit breaker is connected in the switching way, so that the conductive loop is easy to generate heat greatly, the temperature rise is high, materials are wasted, the occupied space is large, and great potential safety hazards exist.

In summary, how to improve the existing dc circuit breaker to improve the arc extinguishing capability and ensure the safety during use is a problem to be solved by those skilled in the art.

Disclosure of Invention

The utility model discloses an overcome the relatively poor lower problem of its security that leads to of traditional direct current circuit breaker's that exists among the prior art arc extinguishing ability, provide now have the arc extinguishing ability stronger with the higher direct current circuit breaker of security.

The utility model discloses a direct current circuit breaker, including the circuit breaker casing, circuit breaker casing upper end be equipped with the protection casing that is used for protecting the circuit breaker casing, the protection casing on fixedly connected with generating line arrange, circuit breaker casing upper end be equipped with the power supply terminal, circuit breaker casing lower extreme be equipped with the load terminal, power supply terminal and load terminal between be equipped with switch module, the other explosion chamber that is used for protecting switch module that is equipped with of switch module, the power supply terminal arrange with generating line and switch module's input electric connection respectively, load terminal and switch module's output electric connection.

Preferably, the switch assembly includes a left disconnection switch, a right disconnection switch is disposed on the right side of the left disconnection switch, an intermediate disconnection switch is disposed between the left disconnection switch and the right disconnection switch, an input end of the intermediate disconnection switch is electrically connected to the power supply terminal, an output end of the intermediate disconnection switch is electrically connected to an input end of the right disconnection switch, an output end of the right disconnection switch is electrically connected to an input end of the left disconnection switch, and an output end of the left disconnection switch is electrically connected to the load terminal.

Preferably, the left circuit breaker includes a left static contact, a left moving contact used in cooperation with the left static contact is disposed above the left static contact, the middle circuit breaker includes a middle static contact, a middle moving contact used in cooperation with the middle static contact is disposed above the middle static contact, the right circuit breaker includes a right static contact, a right moving contact used in cooperation with the right static contact is disposed above the right static contact, the upper end of the left static contact is electrically connected with the upper end of the right static contact through a connection plate, the lower end of the left moving contact is electrically connected with the load terminal, the upper end of the middle static contact is electrically connected with the power terminal, and the lower end of the middle moving contact is electrically connected with the lower end of the right static contact through a short-circuit bar.

Preferably, the left side static contact, the middle static contact and the right side static contact are all the same in structure, the left side moving contact, the right side moving contact and the middle moving contact are all the same in structure, the longitudinal section of the left side static contact is L-shaped, the left end of the horizontal part of the left side static contact is integrally formed with a U-shaped conducting strip, the upper end of the U-shaped conducting strip is welded with a conducting silver rod matched with the left side moving contact for use, and an arc extinguishing grid is arranged on the front side of the left side moving contact.

Preferably, the left end of the connecting plate is provided with a left screw hole which is tightly connected with the upper end of the vertical end of the left static contact through a bolt, the right end of the connecting plate is provided with a right screw hole which is tightly connected with the upper end of the vertical end of the right static contact through a bolt, the waist of the vertical end of the middle static contact is welded with a power supply terminal, and the bus bar is provided with a middle screw hole which is tightly connected with the power supply terminal through a bolt.

Preferably, the upper end of the protective cover is provided with a plurality of uniformly distributed exhaust holes, an air passage is arranged in the arc extinguish chamber and communicated with the exhaust holes, a connecting installation position for installing a connecting plate is arranged on the protective cover below the exhaust holes, a bus installation position for installing a bus bar is arranged below the connecting plate, and the upper side and the lower side of the bus installation position are respectively provided with an insulating rib.

Preferably, the protective covers positioned at the upper end and the lower end of the busbar are respectively provided with insulating slots for mounting insulating ribs in an integrated manner.

The installation the utility model discloses the time, need open the circuit breaker casing with the screwdriver earlier, later respectively with the left side static contact, middle static contact and right side static contact install the position that corresponds in the circuit breaker casing, get the link plate and place in the connection installation position, concatenate left side static contact and right side static contact with bolt and link plate, later get the generating line row and place in the generating line installation position, arrange generating line row and middle static contact fastening connection with the bolt, then get the left side moving contact, middle moving contact and right side moving contact are arranged respectively in and are installed in the position that corresponds in the circuit breaker casing, later pass the tail end of left side moving contact, the tail end of middle moving contact and the tail end of right side moving contact in proper order with a gangbar, install the handle components who is used for pushing down middle moving contact on middle moving contact again, pass through welding wire electric connection with left side moving contact tail end and load terminal, middle moving contact tail end and right side moving contact tail end arrange electric connection through the installation short circuit, circuit breaker casing is closed at last.

During the use, break off the circuit earlier, insert the power end of required circuit with the generating line row, later with load terminal and circuit load end electric connection, later with the circuit switch on can. When the circuit appears the current great when unusual such as, the left side moving contact, middle moving contact and right side moving contact simultaneously with the left side static contact, middle static contact and right side static contact are separated, the circuit is in the state of opening circuit this moment, later the user can investigate the circuit, after the troubleshooting in the circuit was accomplished, the user toggles the handle upwards, middle moving contact is pushed down under handle assembly's effect this moment, the gangbar drives left side moving contact and right side moving contact and middle moving contact respectively and moves down together until middle moving contact is in the contact of middle static contact, the circuit switches on again this moment.

The utility model discloses when satisfying the required function of product, adopt the mode of connection that multipolar concatenated, improve the content and concatenate for two binding post through the static contact after will lengthening with the connection board, realize that the multipolar of circuit breaker concatenates, this mode can satisfy the scheme design demand of user's pluralism. The utility model discloses an add the long static contact and form L shape with the static contact, can make its binding post change vertical direction into by traditional horizontal direction, realize the lug connection of circuit breaker and generating line row, simplify the system architecture, reduce user's cost. The design of protection casing air flue and gas vent can guide the discharge direction of electric arc and air current, has avoided the outside short circuit fault of circuit breaker because the flashover causes.

The utility model discloses a mode of connection compares in conventional circuit breaker product for utilizing bolt assembly to arrange the direct fastening of generating line on the power supply terminal of circuit breaker, has reduced a plurality of conductor connecting pieces and connection point. The utility model discloses with the connection board and the generating line row whole expose outside the circuit breaker, this mode makes the reasonable outside space who has utilized the circuit breaker of user, still can improve the utility model discloses a radiating effect reduces required connection point when installing moreover, more does benefit to the miniaturization that realizes the product, reduces user cost.

The utility model discloses a direct current circuit breaker is when short-circuit protection, and circuit breaker sound contact disconnection, this moment because the product divides the branch and the electric arc that produces can get into the explosion chamber through the guide of arc extinguishing bars piece earlier, and the powerful air current that electric arc high temperature produced can get into the air flue along the oblique ascending direction of arc extinguishing bars piece, the exhaust hole discharge circuit breaker of rethread protection casing upper end at last. Longer air flue stroke can reduce gas temperature, thereby improves the arc extinguishing effect of electric arc pressure drop improvement, separates generating line row and hitch plate through the insulating muscle of installation, has avoided conventional circuit breaker because spout the secondary short circuit calamity that the arc caused, has improved the utility model discloses a security.

The utility model discloses the accessible modifies the length of static contact and the length of connection board and the interval of two connecting holes on the connection board and modifies the mode of concatenating of circuit breaker, realizes that the multipolar of the arbitrary two poles of the earth of circuit breaker concatenates, has improved the utility model discloses an application scope.

The utility model discloses following beneficial effect has: the cost is low, the stability is strong, the safety is high, and the application range is wide.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the longitudinal section structure of the present invention.

Fig. 3 is a schematic circuit diagram of the present invention.

Fig. 4 is a schematic structural view of the left static contact of the present invention.

Fig. 5 is a schematic structural view of the bus bar of the present invention.

The circuit breaker comprises a circuit breaker shell 1, a protective cover 2, a bus bar 3, a power supply terminal 4, a load terminal 5, an arc extinguish chamber 6, a left side static contact 7, a left side moving contact 8, a middle static contact 9, a middle moving contact 10, a right side static contact 11, a right side moving contact 12, a short circuit bar 13, a U-shaped conducting strip 14, a conducting silver 15, an arc extinguish grid piece 16, a left screw hole 17, a right screw hole 18, a middle screw hole 19, an exhaust hole 20, a connecting installation position 21, a bus installation position 22, an insulating rib 23, a connecting plate 24 and an air passage 25.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): further explain a direct current circuit breaker of this example according to attached figure 1, attached figure 2, attached figure 3, attached figure 4 and attached figure 5, including circuit breaker casing 1, 1 upper end of circuit breaker casing be equipped with protection casing 2 that is used for protecting circuit breaker casing 1, protection casing 2 on fixedly connected with generating line row 3, 1 upper end of circuit breaker casing be equipped with power supply terminal 4, 1 lower extreme of circuit breaker casing be equipped with load terminal 5, power supply terminal 4 and load terminal 5 between be equipped with switch module, the other explosion chamber 6 that is used for protecting switch module that is equipped with of switch module, power supply terminal 4 respectively with generating line row 3 and switch module's input electric connection, load terminal 5 and switch module's output electric connection.

The switch assembly comprises a left circuit breaker, a right circuit breaker is arranged on the right side of the left circuit breaker, a middle circuit breaker is arranged between the left circuit breaker and the right circuit breaker, the input end of the middle circuit breaker is electrically connected with a power supply terminal 4, the output end of the middle circuit breaker is electrically connected with the input end of the right circuit breaker, the output end of the right circuit breaker is electrically connected with the input end of the left circuit breaker, and the output end of the left circuit breaker is electrically connected with a load terminal 5.

The left side circuit breaker comprises a left side fixed contact 7, a left side moving contact 8 matched with the left side fixed contact 7 for use is arranged above the left side fixed contact 7, the middle circuit breaker comprises a middle fixed contact 9, a middle moving contact 10 matched with the middle fixed contact 9 for use is arranged above the middle fixed contact 9, the right side circuit breaker comprises a right side fixed contact 11, a right side moving contact 12 matched with the right side fixed contact 11 for use is arranged above the right side fixed contact 11, the upper end of the left side fixed contact 7 and the upper end of the right side fixed contact 11 are electrically connected through a connecting plate 24, the lower end of the left side moving contact 8 is electrically connected with a load terminal 5, the upper end of the middle fixed contact 9 is electrically connected with a power supply terminal 4, and the lower end of the middle moving contact 10 and the lower end of the right side fixed contact 11 are electrically connected through a short connection bar 13.

The left side static contact 7, the middle static contact 9 and the right side static contact 11 are all the same in structure, the left side moving contact 8, the right side moving contact 12 and the middle moving contact 10 are all the same in structure, the longitudinal section of the left side static contact 7 is L-shaped, a U-shaped conducting strip 14 is integrally formed at the left end of the horizontal part of the left side static contact 7, a conducting silver piece 15 matched with the left side moving contact 8 in use is welded at the upper end of the U-shaped conducting strip 14, and an arc extinguishing grid piece 16 is arranged on the front side of the left side moving contact 8.

The left end of the connecting plate 24 is provided with a left screw hole 17 which is tightly connected with the upper end of the vertical end of the left static contact 7 through a bolt, the right end of the connecting plate 24 is provided with a right screw hole 18 which is tightly connected with the upper end of the vertical end of the right static contact 11 through a bolt, the waist part of the vertical end of the middle static contact 9 is welded with a power supply terminal 4, and the bus bar 3 is provided with a middle screw hole 19 which is tightly connected with the power supply terminal 4 through a bolt.

The upper end of the protective cover 2 is provided with a plurality of uniformly distributed exhaust holes 20, an air passage 25 is arranged in the arc extinguish chamber 6, the air passage 25 is communicated with the exhaust holes 20, a connecting installation position 21 for installing a connecting plate 24 is arranged on the protective cover 2 below the exhaust holes 20, a bus installation position 22 for installing a bus bar 3 is arranged below the connecting plate 24, and the upper side and the lower side of the bus installation position 22 are respectively provided with an insulating rib 23.

And insulation slots for installing insulation ribs 23 are respectively and integrally formed on the protective cover 2 positioned at the upper end and the lower end of the bus bar 3.

The above description is only for the specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art in the field of the present invention are all covered by the claims of the present invention.

Claims

1. The utility model provides a direct current circuit breaker, includes circuit breaker casing (1), characterized by, circuit breaker casing (1) upper end be equipped with protection casing (2) that are used for protecting circuit breaker casing (1), protection casing (2) go up fixedly connected with generating line and arrange (3), circuit breaker casing (1) upper end be equipped with power supply terminal (4), circuit breaker casing (1) lower extreme be equipped with load terminal (5), power supply terminal (4) and load terminal (5) between be equipped with switch module, the other explosion chamber (6) that are used for protecting switch module that are equipped with of switch module, power supply terminal (4) respectively with generating line arrange (3) and switch module's input electric connection, load terminal (5) and switch module's output electric connection.

2. A dc breaker according to claim 1, characterized in that the switch assembly comprises a left breaker switch, a right breaker switch is provided on the right side of the left breaker switch, an intermediate breaker switch is provided between the left breaker switch and the right breaker switch, the input of the intermediate breaker switch is electrically connected to the power supply terminal (4), the output of the intermediate breaker switch is electrically connected to the input of the right breaker switch, the output of the right breaker switch is electrically connected to the input of the left breaker switch, and the output of the left breaker switch is electrically connected to the load terminal (5).

3. The direct current circuit breaker according to claim 2, wherein the left side disconnecting switch comprises a left side static contact (7), a left side moving contact (8) used in cooperation with the left side static contact (7) is arranged above the left side static contact (7), the middle disconnecting switch comprises a middle static contact (9), a middle moving contact (10) used in cooperation with the middle static contact (9) is arranged above the middle static contact (9), the right side disconnecting switch comprises a right side static contact (11), a right side moving contact (12) used in cooperation with the right side static contact (11) is arranged above the right side static contact (11), the upper end of the left side static contact (7) is electrically connected with the upper end of the right side static contact (11) through a connecting plate (24), the lower end of the left side moving contact (8) is electrically connected with the load terminal (5), the upper end of the middle static contact (9) is electrically connected with the power supply terminal (4), and the lower end of the middle moving contact (10) is electrically connected with the lower end of the right side static contact (11) through a shorting bar (13).

4. The direct current circuit breaker according to claim 3, wherein the left side static contact (7), the middle static contact (9) and the right side static contact (11) have the same structure, the left side moving contact (8), the right side moving contact (12) and the middle moving contact (10) have the same structure, the longitudinal section of the left side static contact (7) is L-shaped, the left end of the horizontal part of the left side static contact (7) is integrally formed with a U-shaped conducting strip (14), a conducting silver (15) matched with the left side moving contact (8) for use is welded at the upper end of the U-shaped conducting strip (14), and an arc extinguishing grid piece (16) is arranged on the front side of the left side moving contact (8).

5. The direct current circuit breaker according to claim 4, wherein the left end of the connecting plate (24) is provided with a left screw hole (17) which is fastened and connected with the upper end of the vertical end of the left static contact (7) through a bolt, the right end of the connecting plate (24) is provided with a right screw hole (18) which is fastened and connected with the upper end of the vertical end of the right static contact (11) through a bolt, the waist of the vertical end of the middle static contact (9) is welded with the power supply terminal (4), and the bus bar (3) is provided with a middle screw hole (19) which is fastened and connected with the power supply terminal (4) through a bolt.

6. The direct current circuit breaker according to claim 3, characterized in that the upper end of the protective cover (2) is provided with a plurality of uniformly distributed exhaust holes (20), an air passage (25) is arranged in the arc extinguish chamber (6), the air passage (25) is communicated with the exhaust holes (20), the protective cover (2) below the exhaust holes (20) is provided with a connecting installation position (21) for installing a connecting plate (24), a bus installation position (22) for installing a bus bar (3) is arranged below the connecting plate (24), and the upper side and the lower side of the bus installation position (22) are respectively provided with an insulating rib (23).

7. A DC circuit breaker according to claim 6, characterized in that the shields (2) at the upper and lower ends of the busbar (3) are each integrally formed with insulating slots for receiving insulating ribs (23).