CN218769333U

CN218769333U - Direct current breaker

Info

Publication number: CN218769333U
Application number: CN202223356795.9U
Authority: CN
Inventors: 王晖; 周敏琛; 丁晓辉
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-03-28
Anticipated expiration: 2032-12-13

Abstract

A direct current breaker belongs to the technical field of low-voltage electrical appliances. Including contact system and operating device, the contact system includes static contact and moving contact, and operating device drives the moving contact swing for the moving contact realizes contacting or separating with the static contact, and the static contact includes the static contact conducting block, installs stationary contact, characteristics on the static contact conducting block: the static contact conductive block comprises a male conductive block and a female conductive block which are arranged face to face at intervals, a resistor is arranged between the male conductive block and the female conductive block, a static contact is located on the front side of the female conductive block, and the back side of the female conductive block is matched with the resistor. The advantages are that: the shunt is arranged in the male conductive block and the female conductive block of the static contact, so that the occupied space is small, and the shunt is reliably installed.

Description

Direct current breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to direct current breaker.

Background

The low-voltage frame circuit breaker is a low-voltage electrical equipment component with large capacity, is mainly used in an industrial power system, can ensure the connection and disconnection of a circuit under rated load, can automatically disconnect the circuit in abnormal states (such as overload, short circuit, undervoltage and the like) of the circuit, and can completely isolate the load from a power supply by separating a movable contact and a fixed contact. With the development of new energy industries such as photovoltaic, wind power and the like, the application of a low-voltage direct-current circuit breaker is more and more extensive, and different from the traditional low-voltage alternating-current circuit breaker, the direct-current circuit breaker cannot measure direct current by using the induction of alternating magnetic flux, and a shunt, a hall sensor and the like are required to be arranged as a current detection device. In the prior art, one structural mode is to connect a shunt into an external loop of a circuit breaker, which causes the volume of a product to be increased, and a connecting bus is additionally added; another structure is to dispose the shunt inside the circuit breaker, for example, in a "current detection mechanism capable of detecting ground fault for dc circuit breaker" related to chinese patent application publication No. CN103424597A, the current detection mechanism disconnects the conductive block of the moving contact, a plurality of resistor members are disposed in a plurality of recesses of the disconnected conductive block, each resistor member corresponds to one recess, such a structure needs to provide a plurality of recesses to fix the resistor member, which is difficult to process and high in processing cost.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the contact structure of the existing dc circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a direct current breaker, it is with the shunt setting in the conducting block of static contact, occupation space is little, the shunt installation is reliable.

The utility model aims at reaching like this, a direct current breaker, including contact system and operating device, the contact system include static contact and moving contact, operating device drive the moving contact swing, make moving contact and static contact realize contact or separation, the static contact include static contact conducting block, static contact conducting block on install the stationary contact, static contact conducting block including face-to-face interval public conducting block and the female conducting block that sets up each other public conducting block and female conducting block between be equipped with the resistance spare, the stationary contact be located the front of female conducting block, and female conducting block's reverse side with the resistance spare cooperation.

In another specific embodiment of the present invention, said public conducting block is close to one side of said resistance member, on which a public fixing cavity is provided, said public fixing cavity has a first cofferdam all around, and one end of said resistance member is fixed in said public fixing cavity.

In another specific embodiment of the present invention, the female conductive block is close to the female fixed cavity is also provided on one side of the resistor, the female fixed cavity is provided with a second cofferdam around, and the other end of the resistor is fixed in the female fixed cavity.

In another specific embodiment of the present invention, the resistance member is cylindrical and is a plurality of resistance members, and the plurality of resistance members are arranged and then installed between the male conductive block and the female conductive block.

In still another embodiment of the present invention, the resistance member is made of manganese copper.

In yet another specific embodiment of the present invention, the male fixing cavity is further provided with a first engaging groove corresponding to a shape of an end of the resistor.

In a more specific embodiment of the present invention, the female fixing cavity is further provided with a second engaging groove corresponding to the other end of the resistor.

In yet another specific embodiment of the present invention, the resistor is a bent strip.

In a still more specific embodiment of the present invention, the moving contact is electrically connected to the moving contact outlet row, the static contact is electrically connected to the static contact outlet row, and the moving contact outlet row, the moving contact, the static contact and the static contact outlet row form an internal conductive loop of the circuit breaker.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the shunt is arranged in the male and female conductive blocks of the static contact, so that the occupied space is small, and the shunt is reliably installed; convenient processing and low processing cost.

Drawings

Fig. 1 is a schematic diagram of a dc circuit breaker according to the present invention.

Fig. 2 is a schematic view of a static contact according to the first embodiment of the present invention.

Fig. 3 is an explosion diagram of a static contact according to the first embodiment of the present invention.

Fig. 4 is a schematic side view of the female conductive block according to the first embodiment of the present invention.

Fig. 5 is an explosion diagram of a static contact according to a second embodiment of the present invention.

Fig. 6 is a schematic side view of a female conductive block according to a second embodiment of the present invention.

In the figure: 1. the contact comprises a contact system, 11, a fixed contact, 111, a fixed contact conductive block, 1111, a male conductive block, 11111, a male fixed cavity, 11112, a first cofferdam, 11113, a first matching groove, 11114, a mounting hole, 1112, a female conductive block, 11121, a second cofferdam, 11122, a female fixed cavity, 11123, a second matching groove, 1113, a resistance member, 112, an arc striking sheet, 113, a fixed contact, 114, a fixed arc contact and 12, a movable contact; 100. a moving contact outlet row; 200. and (4) a fixed contact outlet row.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position of the corresponding view, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

As shown in fig. 1, the circuit breaker includes a contact system 1 and an operating mechanism 2, wherein the contact system 1 includes a fixed contact 11 and a movable contact 12. The operating mechanism 2 drives the moving contact 12 to swing, so that the moving contact 12 and the fixed contact 11 are contacted or separated. The moving contact 12 is electrically connected to the moving contact outlet 100, and similarly, the fixed contact 11 is electrically connected to the fixed contact outlet 200. So far, the movable contact outlet line row 100, the movable contact 12, the fixed contact 11 and the fixed contact outlet line row 200 form a conductive loop inside the circuit breaker.

For the direct current circuit breaker, a detection component needs to be installed on the conductive loop to detect the current on the conductive loop, so that the controller can know the occurrence of a fault and further realize the operation of breaking the fault current.

The utility model discloses in add on static contact 11 and establish the shunt, this kind of setting, the shunt integration is in static contact 11 on, occupy smallly, the shunt is shorter with the distance of controller simultaneously, more makes things convenient for the sampling of controller on the shunt.

Example one

Fig. 2, fig. 3 and fig. 4 are schematic diagrams of the first embodiment. The static contact 11 comprises a static contact conductive block 111, an arc striking plate 112, a static contact 113 and a static arc contact 114. The arc striking plate 112, the fixed contact 113 and the fixed arc contact 114 are all installed on one side surface of the fixed contact conductive block 111.

The arc striking plate 112 is used for guiding the electric arc to rapidly enter an arc extinguishing chamber above the contact system 1; the fixed contact 113 is used for contacting and matching with a moving contact on the moving contact 12 to bear current; the static arc contact 114 is used for being matched with a dynamic arc contact on the movable contact 12, and when the movable contact is disconnected, current is transferred to the static arc contact 114 and the dynamic arc contact, so that electric arcs can enter an arc extinguishing chamber more conveniently.

The fixed contact conductive block 111 is generally made of copper, the fixed contact conductive block 111 is divided and includes a male conductive block 1111 and a female conductive block 1112 which are arranged at an interval facing each other, and a resistor 1113 is arranged between the male conductive block 1111 and the female conductive block 1112. The resistance member 1113 becomes the resistance element of the shunt, and the voltage information on the conductive loop can be obtained by arranging sampling points on the male conductive block 1111 and the female conductive block 1112.

The arc striking plate 112, the fixed contact 113 and the fixed arc contact 114 are all arranged on one side surface of the female conductive block 1112 far away from the resistance member 1113. That is, the arc runner 112, the fixed contact 113 and the fixed arc contact 114 are located on the front surface of the female conductive block 1112, and the resistive member 1113 is engaged with the back surface of the female conductive block 1112.

A male fixing cavity 11111 is arranged on one side of the male conductive block 1111 close to the resistive member 1113, and a first cofferdam 11112 is arranged around the male fixing cavity 11111. The male fixing cavity 11111 is used for fixing one end of the resistor 1113, and the number of the fixing cavities 11111 is one, so that the processing is simple. The first cofferdam 11112 is used for limiting one end of the resistance member 1113. The male conductive block 1111 is further provided with a mounting hole 11114 for electrically connecting with the fixed contact outlet bar 200.

The female conductive block 1112 also has a female fixing cavity 11122 on a side thereof adjacent to the resistive member 1113, and a second bank 11121 is provided around the female fixing cavity 11122. The second cofferdam 11121 is used for limiting the other end of the resistance member 1113.

In this embodiment, the resistive member 1113 is cylindrical and has a plurality of resistive members 1113, and the plurality of resistive members 1113 are arranged and mounted between the male conductive block 1111 and the female conductive block 1112. The resistive member 1113 is typically constructed of manganin.

Because the number of the male fixing cavities 11111 and the female fixing cavities 11122 is only one, the processing cost is low, and the processing is easy.

Example two

Fig. 5 and 6 are schematic diagrams of a second embodiment. The static contact 11 includes a static contact conductive block 111, an arc striking plate 112, a static contact 113 and a static arc contact 114. The arc striking plate 112, the fixed contact 113 and the fixed arc contact 114 are all installed on one side surface of the fixed contact conductive block 111.

The static contact conductive block 111 is divided and includes a male conductive block 1111 and a female conductive block 1112, and a resistor 1113 is disposed between the male conductive block 1111 and the female conductive block 1112. The resistance member 1113 becomes the resistance element of the shunt, and the sampling points are arranged on the male conductive block 1111 and the female conductive block 1112, so that the current information on the conductive loop can be obtained.

A male fixing cavity 11111 is arranged on one side of the male conductive block 1111 close to the resistive member 1113, and a first cofferdam 11112 is arranged around the male fixing cavity 11111. The male fixing cavity 11111 is used for fixing one end of the resistor 1113, and the number of the fixing cavities 11111 is one, so that the processing is simple. The first cofferdam 11112 is used for limiting one end of the resistance member 1113. A first fitting groove 11113 corresponding to the shape of one end of the resistive member 1113 is formed in the male fixing chamber 11111. The male conductive block 1111 is further provided with a mounting hole 11114 for electrically connecting with the fixed contact outlet bar 200.

The female conductive block 1112 also has a female fixing cavity 11122 on a side thereof adjacent to the resistive member 1113, and a second bank 11121 is provided around the female fixing cavity 11122. The second cofferdam 11121 is used for limiting the other end of the resistance member 1113. A second fitting groove 11123 corresponding to the other end of the resistive member 1113 is formed in the female fixing cavity 11122.

In this embodiment, the resistive member 1113 is a bent strip, and the shapes of the first and second

fitting grooves

11113, 11123 are adapted to the shape of the resistive member 1113.

Claims

1. The utility model provides a direct current circuit breaker, includes contact system (1) and operating device (2), contact system (1) include static contact (11) and moving contact (12), operating device (2) drive moving contact (12) swing for moving contact (12) and static contact (11) realize contact or separation, static contact (11) include static contact conducting block (111), static contact conducting block (111) on install stationary contact (113), its characterized in that: the static contact conductive block (111) comprises a male conductive block (1111) and a female conductive block (1112) which are arranged face to face at intervals, a resistor (1113) is arranged between the male conductive block (1111) and the female conductive block (1112), the static contact (113) is positioned on the front surface of the female conductive block (1112), and the reverse surface of the female conductive block (1112) is matched with the resistor (1113).

2. A direct current circuit breaker according to claim 1, characterized in that: public conducting block (1111) be close to resistance piece (1113) one side on be equipped with public fixed chamber (11111), public fixed chamber (11111) all around have first cofferdam (11112), resistance piece (1113) one end fix in public fixed chamber (11111).

3. A direct current circuit breaker according to claim 1, characterized in that: one side of the female conductive block (1112) close to the resistance member (1113) is also provided with a female fixing cavity (11122), a second cofferdam (11121) is arranged around the female fixing cavity (11122), and the other end of the resistance member (1113) is fixed in the female fixing cavity (11122).

4. A direct current circuit breaker according to claim 1, characterized in that: the resistance member (1113) is cylindrical and is provided with a plurality of resistance members (1113), and the plurality of resistance members (1113) are arranged and then are arranged between the male conductive block (1111) and the female conductive block (1112).

5. A direct current circuit breaker according to claim 4, characterized in that: the resistance member (1113) is made of manganese copper.

6. A direct current circuit breaker according to claim 2, characterized in that: and a first matching groove (11113) corresponding to one end of the resistance member (1113) in shape is also arranged on the male fixing cavity (11111).

7. A direct current circuit breaker according to claim 3, characterized in that: the female fixing cavity (11122) is also provided with a second matching groove (11123) corresponding to the other end of the resistor (1113) in shape.

8. A direct current circuit breaker according to claim 6 or 7, characterized in that: the resistance piece (1113) is in a bent strip shape.

9. A direct current circuit breaker according to claim 1, characterized in that: the moving contact (12) is electrically connected with a moving contact outlet line row (100), the static contact (11) is electrically connected with a static contact outlet line row (200), and the moving contact outlet line row (100), the moving contact (12), the static contact (11) and the static contact outlet line row (200) form a conductive loop inside the circuit breaker.