Fusing mechanism for direct-current circuit breaker

Abstract

The utility model discloses a fusing mechanism for a direct current circuit breaker, which comprises a circuit breaker I, a plurality of circuit breakers II and a fusing mechanism main body connected to the front sides of the circuit breaker I and the circuit breakers II, the first circuit breaker II is clamped with the circuit breaker I, and the second circuit breaker II is clamped with the first circuit breaker II; electrifying grooves are formed in the outer walls of the left sides of the first circuit breaker and each second circuit breaker, first positive and negative electrodes for conduction are connected into the electrifying grooves, conduction batteries matched with the electrifying grooves are connected to the right sides of the first circuit breaker and each second circuit breaker, and second positive and negative electrodes connected with the first positive and negative electrodes in a matched mode are connected to the outer walls of the conduction batteries; the first circuit breaker and the second circuit breaker extend into the electrifying groove through the conduction battery to be connected in an electric melting mode. According to the utility model, the problems that a plurality of fuses are adopted, so that the occupied internal area of the electrical box body is too large, and the plurality of fuses are not easy to install in the electrical box body are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuses, and particularly relates to a fusing mechanism for a DC circuit breaker. Background Art

[0002] A fuse switch is an electrical appliance that plays a safety protection role. It can be used for isolation protection between the power supply and the load, and is also widely used as a protection for the power grid and electrical equipment. It is one of the most commonly used protection devices. When a short circuit or overload occurs in the circuit of the power grid or electrical equipment, the fuse switch can automatically cut off the circuit to avoid damage to electrical equipment and prevent the spread of accidents.

[0003] The fuse mainly uses the fact that the fuse element will overheat and melt when the current is too large due to an overload or short - circuit fault in the circuit, thereby playing a role in protecting electrical equipment. Traditional fuse switches can be divided into two types: straight - pull type and rotary type according to the way of replacing the fuse element. Two terminal posts are provided at both ends of the fuse switch, and the terminal posts are arranged perpendicular to the bottom surface of the fuse switch. When wiring, tools such as a screwdriver are used to screw the bolt head of the terminal post above the fuse switch to fasten the wire.

[0004] For example, in the Chinese patent with the application number 202022006416.8, the utility model discloses a wire clamping device for a fuse switch and the fuse switch, including a fixed frame, a wire pressing plate structure and an operating component. The fixed frame is provided with a wiring groove with an opening facing one end of the fuse switch; the wire pressing plate structure is rotatably arranged in the fixed frame; the operating component includes an operating rod extending along the opening direction of the wiring groove and rotatably arranged in the fixed frame, and a transmission block sleeved on the operating rod through a threaded structure and cooperatively connected with the wire pressing plate structure; adopting this technical solution, when the fuse switch is inserted into the 5G communication box, the wiring groove and the operating rod of the wire clamping device are both horizontally facing the cabinet door of the 5G communication box. As long as the operator reaches into the box with his hand, he can perform the screwing operation on the operating rod. This wire clamping device meets the wiring operation requirements of the fuse switch in the 5G communication box, and the wiring operation is convenient, which can promote the development and application of the fuse switch in 5G communication technology.

[0005] However, there are some problems in the prior art: The fuse needs to connect multiple lines. When there are too many lines, it will increase the load of the fuse, easily cause too large negative pressure and lead to a short circuit. Therefore, it is necessary to add multiple fuses for use. However, using multiple fuses will cause too much occupation of the internal area of the electrical cabinet, and it is not easy to install multiple fuses inside the electrical cabinet. Therefore, we propose a fusing mechanism for a DC circuit breaker. Summary of the Utility Model

[0006] In view of the problems existing in the above-mentioned technology, the present utility model provides a fusing mechanism for a DC circuit breaker, which solves the problems that using multiple fuses will cause excessive occupation of the internal area of the electrical box body and it is not easy to install multiple fuses inside the electrical box body.

[0007] The present utility model is implemented as follows. A fusing mechanism for a DC circuit breaker includes a first circuit breaker, multiple second circuit breakers, and a fusing mechanism main body connected to the front sides of the first circuit breaker and the second circuit breakers. The second circuit breakers have the same structure as the first circuit breaker. The first second circuit breaker is snap-connected to the first circuit breaker, and the second second circuit breaker is snap-connected to the first second circuit breaker. An energizing groove is provided on the outer wall of the left side of the first circuit breaker and each of the second circuit breakers. A positive and negative electrode one for conduction is connected inside the energizing groove. A conduction battery that fits the energizing groove is connected to the right side of the first circuit breaker and each of the second circuit breakers. A positive and negative electrode two that is cooperatively connected to the positive and negative electrode one is connected to the outer wall of the conduction battery. The first circuit breaker and the second circuit breakers are electrically fused and connected through the conduction battery extending into the energizing groove.

[0008] Preferably, a set of T-shaped slots are provided on the outer wall of the left side of the first circuit breaker and each of the second circuit breakers, and the slots are located on the upper and lower sides of the energizing groove.

[0009] Preferably, a block that fits the slot is connected to the outer wall of the right side of the first circuit breaker and each of the second circuit breakers.

[0010] Preferably, a set of positioning blocks are connected to the outer wall of the rear side of the first circuit breaker and each of the second circuit breakers. A groove is provided on the left side of the positioning block. The right side of the positioning block extends to the outside of the right sides of the first circuit breaker and the second circuit breakers, and the right side of the positioning block fits the groove.

[0011] Preferably, a positioning hole that is recessed inward is provided on the outer wall of the right side of the positioning block.

[0012] Preferably, a pin hole that is recessed inward is provided on the outer wall of the rear side of the positioning block. The pin hole communicates with the positioning hole, and the cross sections of the pin hole and the positioning hole are arranged in an L shape.

[0013] Preferably, a fixed pin is provided inside the pin hole, and the fixed pin extends into the positioning hole.

[0014] Preferably, a telescopic groove that is recessed inward is provided on the outer wall of the left side of the positioning hole. A telescopic block is connected inside the telescopic groove. One end of the telescopic block located inside the telescopic groove is connected to a spring. The other end of the telescopic block extends outside the telescopic groove, and the end of the telescopic block extending outside the telescopic groove fits the positioning hole.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The circuit breaker II of the present utility model is connected to the inside of the energizing slot through a conduction battery, which facilitates the connection between the circuit breaker I and the circuit breaker II, or the connection between the circuit breaker II and the circuit breaker II, reduces the area occupied inside the electrical box body, and facilitates the installation of multiple circuit breakers inside the electrical box body;

[0017] Through the electrofusion connection between the positive and negative poles II on the conduction battery and the positive and negative poles I inside the energizing slot, the present utility model realizes the power conduction between circuit breakers through the conduction battery. When one of the circuit breakers trips due to a short circuit, the power transmission of the remaining circuit breakers is stopped, causing the remaining circuit breakers to trip simultaneously, avoiding the circuit breakers from being burned out and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram provided by an embodiment of the present utility model;

[0019] Figure 2 is a rear view schematic diagram of the circuit breaker I provided by an embodiment of the present utility model;

[0020] Figure 3 is a schematic diagram of a sectional view of the top surfaces of the circuit breaker I and the circuit breaker II provided by an embodiment of the present utility model;

[0021] Figure 4 is provided by an embodiment of the present utility model Figure 3 enlarged schematic diagram of area a in;

[0022] Figure 5 is provided by an embodiment of the present utility model Figure 3 enlarged schematic diagram of area b in.

[0023] In the figure: 1. Circuit breaker I; 2. Circuit breaker II; 4. Fixed pin; 5. Main body of the fusing mechanism; 11. Card slot; 12. Energizing slot; 13. Positive and negative poles I; 14. Card block; 15. Conduction battery; 16. Positioning block; 31. Telescopic slot; 32. Spring; 33. Telescopic block; 151. Positive and negative poles II; 161. Positioning hole; 162. Pin hole; 163. Groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to further understand the content, features and effects of the present utility model, the following embodiments are cited and described in detail in conjunction with the accompanying drawings.

[0025] The structure of the present utility model will be described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1:

[0027] As Figure 1As shown in the figure, a fusing mechanism for a DC circuit breaker provided by an embodiment of the present utility model includes a circuit breaker 1, a plurality of circuit breakers 2, and a fusing mechanism main body 5 connected to the front sides of the circuit breaker 1 and the circuit breakers 2. The circuit breakers 2 have the same structure as the circuit breaker 1. The first circuit breaker 2 is snap-connected to the circuit breaker 1, and the second circuit breaker 2 is snap-connected to the first circuit breaker 2;

[0028] As Figure 2 shown, the left outer walls of the circuit breaker 1 and each circuit breaker 2 are provided with power-on grooves 12. A positive and negative electrode 13 for conduction is connected inside the power-on grooves 12. The right sides of the circuit breaker 1 and each circuit breaker 2 are connected with conduction batteries 15 that fit the power-on grooves 12. A positive and negative electrode 151 that cooperates with the positive and negative electrode 13 is connected to the outer wall of the conduction battery 15. The circuit breaker 1 and the circuit breakers 2 are electrically fused and connected through the conduction batteries 15 extending into the power-on grooves 12. The circuit breaker 2 is snap-connected to the inside of the power-on groove 12 through the conduction battery 15, which is convenient for connecting between the circuit breaker 1 and the circuit breakers 2, or for connecting between the circuit breakers 2 and the circuit breakers 2, reducing the area occupied inside the electrical box and facilitating the installation of multiple circuit breakers inside the electrical box. And through the electrical fusion connection between the positive and negative electrode 151 on the conduction battery 15 and the positive and negative electrode 13 inside the power-on groove 12, power conduction between the circuit breakers is realized through the conduction battery 15. When one of the circuit breakers trips due to a short circuit, the power transmission of the remaining circuit breakers is stopped, causing the remaining circuit breakers to trip simultaneously, avoiding damage to the circuit breakers and facilitating maintenance.

[0029] As Figures 3 to 5As shown in the figure, a set of T-shaped slots 11 are provided on the left outer walls of the first circuit breaker 1 and each second circuit breaker 2. The slots 11 are located on the upper and lower sides of the power-on slot 12. A clamping block 14 that fits with the slot 11 is connected to the right outer wall of the first circuit breaker 1 and each second circuit breaker 2. A set of positioning blocks 16 are connected to the rear outer walls of the first circuit breaker 1 and each second circuit breaker 2. A groove 163 is provided on the left side of the positioning block 16. The right side of the positioning block 16 extends to the outside of the right sides of the first circuit breaker 1 and the second circuit breaker 2, and the right side of the positioning block 16 fits with the groove 163. A positioning hole 161 that is recessed inward is provided on the right outer wall of the positioning block 16. A pin hole 162 that is recessed inward is provided on the rear outer wall of the positioning block 16. The pin hole 162 communicates with the positioning hole 161, and the cross-sections of the pin hole 162 and the positioning hole 161 are arranged in an L shape. A fixed pin 4 is provided inside the pin hole 162, and the fixed pin 4 extends into the positioning hole 161. A telescopic groove 31 that is recessed inward is provided on the left outer wall of the positioning hole 161. A telescopic block 33 is connected inside the telescopic groove 31. One end of the telescopic block 33 located inside the telescopic groove 31 is connected to a spring 32. The other end of the telescopic block 33 extends outside the telescopic groove 31, and the end of the telescopic block 33 that extends outside the telescopic groove 31 fits with the positioning hole 161. The clamping block 14 extends into the slot 11 between the circuit breakers, improving the connection stability between the circuit breakers. And through the mutual contact between the positioning blocks 16, it is convenient to compress the telescopic block 33 into the telescopic groove 31. During the process of the telescopic block 33 moving into the telescopic groove 31, the spring 32 is compressed, causing the spring 32 to deform. When the telescopic groove 31 corresponds to the positioning hole 161, the spring 32 rebounds, driving the telescopic block 33 to extend into the positioning hole 161 for limit fixation, facilitating the limit fixation between the circuit breakers. And through the provided fixed pin 4, the fixed pin 4 is inserted into the pin hole 162 and extends into the positioning hole 161, thereby driving the telescopic block 33 to extend out of the positioning hole 161, facilitating the disassembly between the circuit breakers.

[0030] Working principle of Embodiment 1:

[0031] During use, the second circuit breaker 2 is clamped into the power-on slot 12 through the conduction battery 15, facilitating the connection between the first circuit breaker 1 and the second circuit breaker 2, or the connection between the second circuit breakers 2, reducing the area occupied inside the electrical box body and facilitating the installation of multiple circuit breakers inside the electrical box body. And through the electrofusion connection between the positive and negative electrodes 151 on the conduction battery 15 and the positive and negative electrodes 13 inside the power-on slot 12, power conduction is achieved between the circuit breakers through the conduction battery 15. When one of the circuit breakers trips due to a short circuit, the power transmission of the remaining circuit breakers is stopped, causing the remaining circuit breakers to trip simultaneously, avoiding the circuit breakers from being burned out and facilitating maintenance.

[0032] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuse mechanism for a DC circuit breaker, comprising a circuit breaker 1 (1), a plurality of circuit breakers 2 (2), and a fuse mechanism body (5) connected to the front sides of the circuit breaker 1 (1) and the circuit breaker 2 (2), characterized in that: The circuit breaker 2 (2) has the same structure as the circuit breaker 1 (1), the first circuit breaker 2 (2) is snap-connected with the circuit breaker 1 (1), and the second circuit breaker 2 (2) is snap-connected with the first circuit breaker 2 (2); The circuit breaker 1 (1) and each of the circuit breakers 2 (2) are provided with a power-on slot (12) on their left outer walls, and the power-on slot (12) is internally connected with a positive and negative electrode 1 (13) for conducting electricity, and the circuit breaker 1 (1) and each of the circuit breakers 2 (2) are connected on their right sides with a conductive battery (15) that matches the power-on slot (12), and the outer wall of the conductive battery (15) is connected with a positive and negative electrode 2 (151) that matches the positive and negative electrode 1 (13), and the circuit breaker 1 (1) and the circuit breaker 2 (2) are electrically fused through the conductive battery (15) that extends into the power-on slot (12).

2. A fuse mechanism for a DC circuit breaker according to claim 1, characterized in that: The left side outer wall of the circuit breaker 1 (1) and each of the circuit breakers 2 (2) is provided with a group of T-shaped slots (11), and the slots (11) are located at the upper and lower sides of the power supply slot (12).

3. A fuse mechanism for a DC circuit breaker according to claim 2, characterized in that: The right side outer wall of the circuit breaker 1 (1) and each of the circuit breakers 2 (2) is connected with a clamping block (14) that fits with the clamping slot (11).

4. A fuse mechanism for a DC circuit breaker according to claim 1, characterized in that: A group of positioning blocks (16) are connected to the rear outer wall of the circuit breaker one (1) and each of the circuit breakers two (2); a groove (163) is provided on the left side of the positioning block (16); the right side of the positioning block (16) extends to the outside of the right side of the circuit breaker one (1) and the circuit breaker two (2); and the right side of the positioning block (16) fits in the groove (163).

5. A fuse mechanism for a DC circuit breaker according to claim 4, characterized in that: The right outer wall of the positioning block (16) is provided with an inwardly recessed positioning hole (161).

6. A fuse mechanism for a DC circuit breaker according to claim 5, characterized in that: The rear outer wall of the positioning block (16) is provided with an inwardly recessed latch hole (162), the latch hole (162) is communicated with the positioning hole (161), and the latch hole (162) and the positioning hole (161) are arranged in an L-shaped cross section.

7. A fuse mechanism for a DC circuit breaker according to claim 6, characterized in that: A fixing pin (4) is provided inside the pin hole (162), and the fixing pin (4) extends into the interior of the positioning hole (161).

8. A fuse mechanism for a DC circuit breaker according to claim 7, characterized in that: The left outer wall of the positioning hole (161) is provided with an inwardly recessed telescopic groove (31), the interior of the telescopic groove (31) is connected with a telescopic block (33), one end of the telescopic block (33) located inside the telescopic groove (31) is connected with a spring (32), the other end of the telescopic block (33) extends to the outside of the telescopic groove (31), and the end of the telescopic block (33) extending to the outside of the telescopic groove (31) fits with the positioning hole (161).

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