CN218826927U

CN218826927U - Direct current breaker

Info

Publication number: CN218826927U
Application number: CN202223356403.9U
Authority: CN
Inventors: 管瑞良; 王晖; 周敏琛
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: 2023-04-07
Anticipated expiration: 2032-12-13

Abstract

A direct current breaker belongs to the technical field of low-voltage electrical appliances. The device comprises a contact system and an operating mechanism, wherein the contact system comprises a fixed contact and a movable contact; the moving contact include moving contact and conducting block, the moving contact pass through the flexible coupling with the conducting block electricity be connected, the conducting block including public conducting block and the female conducting block that face to face interval set up each other public conducting block and female conducting block between public conducting block and the female conducting block be equipped with resistance spare, characteristics are: a first positioning groove is formed in one end face of the male conductive block, a second positioning groove is formed in one end face of the female conductive block, and two ends of the resistor are embedded into the first positioning groove and the second positioning groove respectively to achieve positioning and installation. The advantages are that: the shunt is arranged in the male conductive block and the female conductive block of the movable contact, the occupied space is small, only one groove is formed in each of the male conductive block and the female conductive block of each conductive block for installing the resistor, the processing is easy, and the processing cost is low.

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 of the circuit (such as overload, short circuit, undervoltage and the like), and can completely isolate the load from a power supply by separating a moving contact and a static 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 existing structure, one way is to connect the shunt into the external circuit of the breaker, which causes the volume of the product to increase, and additionally adds a connecting bus; another way is to arrange the shunt inside the circuit breaker, for example, in chinese patent application publication No. CN103424597A, which relates to a "current detection mechanism capable of detecting ground fault for dc circuit breaker", the current detection mechanism disconnects the conductive block of the movable contact, a plurality of resistor members are arranged 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, 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 structure of the moving contact 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, its shunt sets up in the conducting block of moving contact, and occupation space is little, all only sets up a groove and installs resistance spare on public conducting block and the female conducting block of conducting block, and processing is easy, and the processing cost is low.

The utility model aims at achieving the purpose, the direct current breaker comprises a contact system and an operating mechanism, wherein the contact system comprises a static contact and a moving contact; the moving contact comprises a moving contact piece and a conductive block, the moving contact piece is electrically connected with the conductive block through flexible connection, the 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 first positioning groove is formed in one end face of the male conductive block, a second positioning groove is formed in one end face of the female conductive block, and two ends of the resistor are respectively embedded into the first positioning groove and the second positioning groove to achieve positioning and installation.

In a specific embodiment of the present invention, the resistor comprises a pair of resistor strips, the bottom of each end surface of the resistor strip is provided with a pair of semi-positioning protrusions, and after the bottom surfaces of the pair of resistor strips are attached to each other, the semi-positioning protrusions on the two resistor strips are stacked together to form a complete positioning protrusion.

In another specific embodiment of the present invention, the movable contact further includes a contact support, the movable contact is rotatably disposed on the contact support, the conductive block is fixed on the circuit breaker, and the contact support can swing relative to the fixed contact.

In another specific embodiment of the present invention, the resistor is a rectangular strip and is only one, two end faces of the resistor are respectively provided with a strip-shaped protrusion, and the two strip-shaped protrusions are respectively embedded into the first positioning groove and the second positioning groove to realize positioning and installation.

In a further embodiment of the invention, the length of the protrusion corresponds to the length of the resistive element.

In yet another embodiment of the present invention, the pair of resistor strips are rectangular strips, and the half-positioning protrusion is also rectangular strips.

In yet another specific embodiment of the present invention, the length of the semi-positioning protrusion is identical to the length of the resistor strip.

In a more specific embodiment of the present invention, the pair of resistor strips are the same in shape and size.

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

In a still more specific embodiment of the present invention, the resistor strip is made of manganese copper.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the shunt is arranged in the male conductive block and the female conductive block of the moving contact, the occupied space is small, only one groove is arranged on each of the male conductive block and the female conductive block of the conductive block for installing the resistance element, the processing is easy, and the processing cost is low; meanwhile, the distance between the shunt and the controller is shorter, and the controller can sample on the shunt more conveniently.

Drawings

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

Fig. 2 is an exploded view of the moving contact according to the first embodiment of the present invention.

Fig. 3 is an exploded view of the other side of the movable contact according to the first embodiment of the present invention.

Fig. 4 is a schematic view of a male conductive block of a movable contact according to a first embodiment of the present invention.

Fig. 5 is a schematic view of a female conductive block of a movable contact according to a first embodiment of the present invention.

Fig. 6 is a schematic view of a conductive member according to a first embodiment of the present invention.

Fig. 7 is an exploded view of a second embodiment of a movable contact according to the present invention.

Fig. 8 is an exploded view of the other side of the movable contact according to the second embodiment of the present invention.

Fig. 9 is a schematic view of a conductive member according to a second embodiment of the present invention.

In the figure: 1. the contact system comprises a contact system, 11, a fixed contact, 12, a movable contact, 121, a contact support, 122, a movable contact piece, 123, a conductive block, 1231, a male conductive block, 12311, a first positioning groove, 12312, a flexible connection fixing groove, 12313, a fixing hole, 1232, a female conductive block, 12321, a second positioning groove, 1233, a resistor, 12331, a protrusion, 12332, a resistor strip and 123321, and a semi-positioning protrusion; 2. an operating mechanism; 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. 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.

Example one

Fig. 2 to 6 are schematic views of the first embodiment.

The utility model discloses in add on moving contact 12 and establish the shunt, this kind of setting, the shunt integration is in moving contact 12 on, occupy smallly, the distance of shunt and controller is shorter simultaneously, more makes things convenient for the sampling of controller on the shunt.

The movable contact 12 includes a contact holder 121, a movable contact piece 122 and a conductive block 123. The movable contact piece 122 is rotatably disposed on the contact holder 121, the conductive block 123 is fixed on the circuit breaker, and the movable contact piece 122 is electrically connected to the conductive block 123 through a flexible connection (not shown).

The contact support 121 is a housing of a moving contact, and the contact support 121 can swing relative to the stationary contact 11, so that the moving contact 12 can swing relative to the stationary contact 11, thereby realizing the contact or separation of the moving contact 12 and the stationary contact 11. The movable contact piece 122 is used for carrying current, and a movable contact is mounted on the movable contact piece and is in contact fit with a fixed contact on the fixed contact 11, and the conductive block 123 is also a current carrying component on the movable contact 12. So far, the moving contact piece 122, the flexible connection and the conductive block 123 form a current path on the moving contact.

The conductive block 123 is generally made of copper, the conductive block 123 is divided, and includes a male conductive block 1231 and a female conductive block 1232 which are arranged to face each other at an interval, and a resistor 1233 is disposed between the male conductive block 1231 and the female conductive block 1232. The resistance element 1233 becomes the resistance element of the shunt, and the sampling points are arranged on the male conductive block 1231 and the female conductive block 1232, so that the voltage information on the conductive loop can be obtained.

Preferably, the resistive member 1233 is electrically connected to the male conductive bump 1231 and the female conductive bump 1232 by welding.

As shown in fig. 4, which is a schematic view of the common conductive block 1231, the common conductive block 1231 is generally made of copper, which is advantageous for conducting current. A first positioning groove 12311 is disposed on an end surface of the common conductive block 1231 close to the resistive element 1233. The first positioning groove 12311 is used for cooperating with the resistive element 1233 to realize the positioning therebetween.

The male conductive block 1231 is further provided with a flexible connection fixing groove 12312, the flexible connection fixing groove 12312 is a plurality of horizontal arrays and can be used for fixing one end of a plurality of flexible connections, and after the flexible connection fixing groove 12312 is fixed, the flexible connection and the male conductive block 1231 are electrically connected.

The public conducting block 1231 is further provided with a fixing hole 12313, and the fixing hole 12313 is used for fixing the public conducting block 1231 on the circuit breaker, so that the public conducting block 1231 is fixed relative to the circuit breaker.

As shown in fig. 5, which is a schematic view of the female conductive block 1232, a second positioning groove 12321 is formed on an end surface of the female conductive block 1232 close to the resistive element 1233. The second positioning groove 12321 is used for cooperating with the resistor 1233 to position the resistor therebetween.

The first positioning groove 12311 and the second positioning groove 12321 are used for positioning, that is, after the two ends of the resistive member 1233 are embedded into the first positioning groove 12311 and the second positioning groove 12321, welding is needed to achieve reliable electrical connection between the resistive member 1233 and the male conductive block 1231 and the female conductive block 1232.

As shown in fig. 6, in the present embodiment, the resistive element 1233 is formed in a rectangular bar shape, only one resistive element 1233 is provided, one elongated protrusion 12331 is provided on each end surface of the resistive element 1233, and after the two elongated protrusions 12331 are respectively fitted into the first positioning groove 12311 and the second positioning groove 12321, the resistive element 1233 is positioned and fixed by welding.

Preferably, the length of the protrusion 12331 corresponds to the length of the resistive member 1233.

Preferably, the resistive member 1233 is generally made of manganin.

Since the first positioning groove 12311 and the second positioning groove 12321 are both only one, the processing cost is low, and the processing is easy.

Example 2

Fig. 7, 8 and 9 are schematic views of a second embodiment. The difference between the second embodiment and the first embodiment is that: the resistor 1233 includes a pair of resistor strips 12332, a pair of half-positioning protrusions 123321 is respectively disposed at the bottoms of the two end surfaces of each resistor strip 12332, and after the bottom surfaces of the pair of resistor strips 12332 are attached to each other, the half-positioning protrusions 123321 on the two resistor strips 12332 are stacked together to form a complete positioning protrusion.

After the bottom surfaces of the pair of resistor strips 12332 are attached to each other, the pair of semi-positioning protrusions 123321 on each resistor strip 12332 are attached to each other vertically to form a pair of positioning protrusions. The positioning protrusions are embedded into the first positioning groove 12311 and the second positioning groove 12321, so that the pair of resistor strips 12332 are positioned with the male conductive block 1231 and the female conductive block 1232, respectively, and then are fixed by welding.

The pair of resistor strips 12332 have the same shape and size and are rectangular strips. The half-positioning protrusion 123321 is also a rectangular bar, and more preferably, the length of the half-positioning protrusion 123321 is the same as the length of the resistor strip 12332. The pair of resistor tracks 12332 are typically made of manganin.

Claims

1. A direct current breaker comprises a contact system (1) and an operating mechanism (2), wherein the contact system (1) comprises a fixed contact (11) and a movable contact (12); the moving contact (12) include moving contact piece (122) and electrically conductive piece (123), moving contact piece (122) pass through the flexible coupling with electrically conductive piece (123) electricity be connected, electrically conductive piece (123) including public electrically conductive piece (1231) and female electrically conductive piece (1232) that face to face the interval set up each other public electrically conductive piece (1231) and female electrically conductive piece (1232) between be equipped with resistance piece (1233), its characterized in that: the end face of the public conducting block (1231) is provided with a first positioning groove (12311), the end face of the female conducting block (1232) is provided with a second positioning groove (12321), and two ends of the resistor (1233) are respectively embedded into the first positioning groove (12311) and the second positioning groove (12321) to realize positioning and installation.

2. The dc circuit breaker according to claim 1, wherein: the resistance piece (1233) comprises a pair of resistance strips (12332), a pair of semi-positioning protrusions (123321) are arranged at the bottoms of the two end faces of each resistance strip (12332), and after the bottom faces of the pair of resistance strips (12332) are attached to the bottom faces of the pair of resistance strips, the semi-positioning protrusions (123321) on the two resistance strips (12332) are laminated together to form a complete positioning protrusion.

3. The direct current circuit breaker according to claim 1, characterized in that: the moving contact (12) further comprises a contact support (121), the moving contact (122) is rotatably arranged on the contact support (121), the conductive block (123) is fixed on the circuit breaker, and the contact support (121) can swing relative to the fixed contact (11).

4. The direct current circuit breaker according to claim 1, characterized in that: the resistance piece (1233) is rectangular and only one, the two end faces of the resistance piece (1233) are respectively provided with a long-strip-shaped protrusion (12331), and the two long-strip-shaped protrusions (12331) are respectively embedded into the first positioning groove (12311) and the second positioning groove (12321) to realize positioning and installation.

5. The direct current circuit breaker according to claim 4, characterized in that: the length of the protrusion (12331) corresponds to the length of the resistive member (1233).

6. The dc circuit breaker according to claim 2, wherein: the pair of resistor strips (12332) are both rectangular strips, and the half positioning protrusions (123321) are also rectangular strips.

7. The dc circuit breaker according to claim 2, wherein: the length of the semi-positioning protrusion (123321) is consistent with that of the resistor strip (12332).

8. The direct current circuit breaker according to claim 2, characterized in that: the pair of resistor strips (12332) are identical in shape and size.

9. The dc circuit breaker according to claim 1, wherein: the resistance piece (1233) is made of manganin.

10. The dc circuit breaker according to claim 2, wherein: the resistance strips (12332) are made of manganin.