Miniature fuse type disconnecting switch

Abstract

The utility model relates to the technical field of disconnecting switches, in particular to a miniature fuse type disconnecting switch, which is used for being mounted on a bus bar in a power distribution cabinet and comprises a base and a buckle cover rotationally connected with the base, three groups of phase units distributed in a staggered manner and three fuses distributed in a staggered manner are arranged in the base, and the buckle cover is arranged in the base. The three fuses are respectively connected with the buckle cover through the connecting parts, and the buckle cover has a first state in which the three fuses are rotated to be electrically connected with the corresponding phase units at the same time and a second state in which the three fuses are disconnected with the corresponding phase units at the same time. According to the utility model, the fuses and the corresponding opposite units are distributed in a staggered manner, so that the overall length and size of the isolating switch are reduced, the isolating switch can adapt to the installation environment of a power distribution cabinet with limited size, and the isolating switch can be easily matched with the trend and spacing of busbars in the power distribution cabinet.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disconnecting switch especially to a small fuse type disconnecting switch. BACKGROUND

[0002] The fuse type disconnecting switch is a switch for protecting the electric equipment through the fuse, is a switch that can be manually operated, is an insurance device that provides overload and short circuit protection by the fuse body, and is also a safety device that can provide a safe isolation breaking point, plays a vital role in the low-voltage distribution system, fully utilizes the protection characteristic curve of the fuse to realize protection of the equipment in the distribution line, provides an obvious breaking point during maintenance to ensure the personal safety of the staff and protect the safety of the entire circuit.

[0003] However, with the development of the disconnecting switch technology, the traditional fuse type disconnecting switch has many problems, for example, multiple fuses are arranged in a line and installed in the disconnecting switch in sequence, and the circuit separation of each fuse also needs to be ensured, which leads to that the length and size of the designed disconnecting switch are relatively large, the disconnecting switch cannot be placed in the distribution cabinet with a small size, and the disconnecting switch also needs to be adapted to the busbar in the distribution cabinet. SUMMARY

[0004] The utility model discloses a small fuse type disconnecting switch, the fuses and the corresponding phase units are staggered, the length and size of the disconnecting switch are reduced, the disconnecting switch can be adapted to the installation environment of the distribution cabinet with a limited size, and the trend and spacing of the busbar in the distribution cabinet are also matched.

[0005] The utility model discloses the technical scheme as follows: a small fuse type disconnecting switch is used to be installed on the busbar in the distribution cabinet, comprising a base and a buckle cover rotationally connected with the base, three groups of phase units and three fuses are arranged in the base in a staggered mode, the three fuses are connected with the buckle cover through connecting parts, the buckle cover has a first state that the three fuses are connected with the corresponding phase units in an electrical mode and a second state that the three fuses are disconnected with the corresponding phase units.

[0006] Each phase unit comprises an incoming copper sheet and an outgoing copper sheet, each incoming copper sheet is connected with the corresponding outgoing copper sheet in an electrical mode through a fuse, and three terminal connectors are arranged on one side of the base and connected with the corresponding outgoing copper sheets in an electrical mode.

[0007] The mounting rack is provided with three insertion slots on the top surface for inserting corresponding fuses, the incoming copper sheets and outgoing copper sheets extend to two ends inside the corresponding insertion slots respectively, the three outgoing copper sheets are staggered and distributed between the mounting rack and the base, and the bottom of the base is provided with three independent wire grooves for mounting one incoming copper sheet respectively.

[0008] Three electric connectors are electrically connected to the three incoming copper sheets respectively, the three electric connectors are used for electrically connecting to corresponding bus bars respectively, the two side edges of each wire groove are extended with a partition plate, the three electric connectors are embedded in the corresponding partition plates respectively, and each group of partition plates is buckled with an insulating cover for shielding the corresponding electric connector.

[0009] The end face of the buckle cover away from the base is further provided with a transparent cover.

[0010] The two side edges of the transparent cover are provided with a convex edge, the buckle cover is provided with a clamping groove matched with the convex edge, one side of the clamping groove is provided with an opening, and the transparent cover is inserted into the clamping groove through the opening along the convex edge.

[0011] The base is further provided with a micro switch, and the micro switch is pressed down when the buckle cover is in the first state.

[0012] The beneficial effects of the utility model are as follows: by designing three groups of phase units and three fuses to be staggered and distributed, the space layout limitation of traditional linear arrangement is broken, the overall length of the disconnecting switch is significantly shortened, the disconnecting switch is miniaturized, can adapt to the installation environment of the power distribution cabinet with limited size, is more easy to match the trend and spacing of the bus bar in the power distribution cabinet, reduces the space conflict during installation, improves the space utilization efficiency and assembly flexibility in the power distribution cabinet, the three fuses are connected with the buckle cover through the connecting part to form integrated linkage, so that the buckle cover can realize the connection or disconnection of the three fuses and the corresponding phase units synchronously under single rotating operation, ensures the synchronous isolation of three-phase circuit, and further guarantees the personal safety during maintenance operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2The utility model discloses a structure schematic drawing of removing transparent cover;

[0016] Figure 3 The utility model discloses a structure schematic drawing of the buckle cover in the second state;

[0017] Figure 4 The utility model discloses an explosion schematic drawing;

[0018] Figure 5 The utility model discloses a structure schematic drawing of phase unit in the utility model;

[0019] Figure 6 The utility model discloses a structure schematic drawing of another perspective;

[0020] Figure 7 The utility model discloses a structure schematic drawing of transparent cover when being taken out;

[0021] In the drawing, 1-base, 2-buckle cover, 3-fuse, 4-connection part, 5-incoming line copper sheet, 6-outgoing line copper sheet, 7-wiring terminal, 8-mounting frame, 9-slot, 10-wire slot, 11-electric connection piece, 12-baffle, 13-insulating cover, 14-transparent cover, 15-convex edge, 16-clamping groove, 17-opening, 18-microswitch. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will combine the attached drawing to make further detailed description to the utility model.

[0023] It is to be noted that all the expressions of "first" and "second" in the utility model embodiment are for distinguishing two same name non-identical entities or non-identical parameters, and "first" and "second" are only for the convenience of expression, and should not be understood as the limitation of the utility model embodiment, and the subsequent embodiment will not be described one by one.

[0024] The direction and position language mentioned in the utility model, for example, "up", "down", "front", "back", "left", "right", "inner", "outer", "top", "bottom", "side" and the like, are only the direction or position of the attached drawing.

[0025] For example, Figures 1 to 7As shown, it is an embodiment of the utility model, small -size fuse -type disconnecting circuit breaker for installing on the busbar row in the distribution cabinet, including base 1 and with base 1 rotatory connection's buckle 2, the base 1 is equipped with three groups staggered distribution's phase unit and three also staggered distribution's fuse 3, three the fuse 3 is connected with buckle 2 through connecting portion 4 respectively, buckle 2 has the first state of rotating to three fuses 3 simultaneously with corresponding phase unit electric connection, and the second state of three fuses 3 simultaneously with corresponding phase unit disconnection.

[0026] The beneficial effects of such arrangement are as follows: by designing three groups of phase units and three fuses as staggered distribution, breaking the space layout limitation of traditional linear arrangement, significantly shortening the overall length of the disconnecting circuit breaker, realizing the miniaturization of the disconnecting circuit breaker, making it can adapt to the size limited installation environment of the distribution cabinet, more easily matching the trend and spacing of the busbar row in the distribution cabinet, reducing the space conflict during installation, improving the space utilization efficiency and assembly flexibility inside the distribution cabinet, three fuses are connected with the buckle through the connecting portion to form integrated linkage, so that the buckle can realize the connection or disconnection of three fuses and corresponding phase units under single rotating operation, ensuring the synchronous isolation of three-phase circuit, further ensuring the personal safety of maintenance operation.

[0027] Further arrangement, each phase unit includes an incoming copper sheet 5 and an outgoing copper sheet 6, each incoming copper sheet 5 is electrically connected to the corresponding outgoing copper sheet 6 through a fuse 3, and the base 1 further includes three terminal blocks 7, each terminal block 7 is electrically connected to the corresponding outgoing copper sheet 6.

[0028] The beneficial effects of such arrangement are as follows: by independently arranging incoming copper sheet and outgoing copper sheet for each phase unit, and directly connecting through fuse, an independent modularized conductive circuit is formed, which not only has clear electrical path and low impedance, but also effectively ensures the circuit isolation between each phase unit, improves the current-carrying stability and safety, and the three terminal blocks arranged on one side of the base are directly connected to the outgoing copper sheets, providing a unified and intuitive wiring interface for external load circuit.

[0029] Further arrangement, the base 1 further includes a mounting bracket 8, the top surface of the mounting bracket 8 is provided with three insertion slots 9 for inserting the corresponding fuses 3, the incoming copper sheet 5 and the outgoing copper sheet 6 extend to both ends inside the corresponding insertion slots 9, the three outgoing copper sheets 6 are staggered between the mounting bracket 8 and the base 1, and the bottom of the base 1 is provided with three independent wire grooves 10, each wire groove 10 is provided for mounting an incoming copper sheet 5.

[0030] The beneficial effects of such an arrangement are as follows: by providing an installation rack with three dedicated slots, each fuse is provided with independent and precise installation positioning, this design enables quick and aligned insertion and removal of the fuses, effectively preventing misinstallation, and improving the efficiency and convenience of assembly, maintenance and replacement. The installation rack, as the core bearing structure, is fixed with the staggered distribution of outgoing copper sheets together with the base, enhancing the integrity and mechanical strength of the internal structure. Meanwhile, the three independent line slots in the bottom accommodate the phase-in copper sheets respectively, ensuring reliable electrical isolation between different phase units and avoiding the risk of phase-to-phase short circuit. The design of the installation rack and the slots integrates the fuses, phase-in copper sheets and outgoing copper sheets into a compact three-dimensional layout.

[0031] Further arrangement, each of the three phase-in copper sheets 5 is electrically connected with an electrical connector 11, and the three electrical connectors 11 are respectively used for electrical connection with the corresponding bus bar. The two side edges of each line slot 10 extend with a partition plate 12, and the three electrical connectors 11 are respectively embedded in the corresponding partition plate 12. Each group of partition plates 12 is respectively buckled with an insulating cover 13 for shielding the corresponding electrical connector 11.

[0032] The beneficial effects of such an arrangement are as follows: by providing an installation rack with three dedicated slots, each fuse is provided with independent and precise installation positioning, this design enables quick and aligned insertion and removal of the fuses, effectively preventing misinstallation, and improving the efficiency and convenience of assembly, maintenance and replacement. The installation rack, as the core bearing structure, is fixed with the staggered distribution of outgoing copper sheets together with the base, enhancing the integrity and mechanical strength of the internal structure. Meanwhile, the three independent line slots in the bottom accommodate the phase-in copper sheets respectively, ensuring reliable electrical isolation between different phase units and avoiding the risk of phase-to-phase short circuit. The design of the installation rack and the slots integrates the fuses, phase-in copper sheets and outgoing copper sheets into a compact three-dimensional layout.

[0033] Further arrangement, the end face of the buckle cover 2 away from the base 1 is further provided with a transparent cover 14.

[0034] The beneficial effects of such an arrangement are as follows: by providing an installation rack with three dedicated slots, each fuse is provided with independent and precise installation positioning, this design enables quick and aligned insertion and removal of the fuses, effectively preventing misinstallation, and improving the efficiency and convenience of assembly, maintenance and replacement. The installation rack, as the core bearing structure, is fixed with the staggered distribution of outgoing copper sheets together with the base, enhancing the integrity and mechanical strength of the internal structure. Meanwhile, the three independent line slots in the bottom accommodate the phase-in copper sheets respectively, ensuring reliable electrical isolation between different phase units and avoiding the risk of phase-to-phase short circuit. The design of the installation rack and the slots integrates the fuses, phase-in copper sheets and outgoing copper sheets into a compact three-dimensional layout.

[0035] Further arrangement, the two side edges of the transparent cover 14 are provided with a convex edge 15, and the buckle cover 2 is provided with a clamping groove 16 matched with the convex edge 15. One side of the clamping groove 16 is provided with an opening 17, and the transparent cover 14 is inserted into the clamping groove 16 along the opening 17 through the convex edge 15.

[0036] The beneficial effects of such arrangement are as follows: through the cooperation of the convex edge and the clamping groove, and in combination with the opening design on one side, the quick plug-in installation of the transparent cover is realized, that is, the drawer type installation mode, the structure does not need to use screws and other additional fasteners, greatly simplifies the assembly process, and at the same time ensures the stability and accurate alignment of the connection between the transparent cover and the buckle cover.

[0037] Further arrangement, the base 1 is further provided with a micro switch 18, when the buckle cover 2 is in the first state, the micro switch 18 is pressed.

[0038] The beneficial effects of such arrangement are as follows: through the cooperation of the convex edge and the clamping groove, and in combination with the opening design on one side, the quick plug-in installation of the transparent cover is realized, that is, the drawer type installation mode, the structure does not need to use screws and other additional fasteners, greatly simplifies the assembly process, and at the same time ensures the stability and accurate alignment of the connection between the transparent cover and the buckle cover.

[0039] The above only discloses the preferred embodiment of the utility model, of course, cannot with this to limit the utility model right scope, therefore, the equivalent change made according to the utility model claim, still belongs to the range covered by the utility model.

Claims

1. Miniature fuse-type disconnector for installation on a busbar in a switchboard, characterised in that: The utility model relates to a kind of fuse box, including base (1) and the cover (2) rotationally connected with base (1), the base (1) is equipped with three groups of staggered distribution phase unit and three also staggered distribution fuses (3), three the fuses (3) are connected with cover (2) by connecting portion (4) respectively, the cover (2) has the first state of rotation to three fuses (3) simultaneously with corresponding phase unit electrically connected, and the second state of three fuses (3) simultaneously with corresponding phase unit disconnected.

2. The miniature fuse disconnect switch of claim 1, wherein: Each group of the phase unit includes an incoming copper sheet (5) and an outgoing copper sheet (6), each incoming copper sheet (5) is electrically connected to the corresponding outgoing copper sheet (6) through a fuse (3), and the base (1) further includes three terminal blocks (7) on one side, each of which is electrically connected to a corresponding outgoing copper sheet (6).

3. The miniature fuse disconnect switch of claim 2, wherein: The base (1) further includes a mounting rack (8) inside, the top surface of the mounting rack (8) is provided with three insertion slots (9) for corresponding fuses (3), the incoming copper sheet (5) and the outgoing copper sheet (6) extend to both ends inside the corresponding insertion slot (9), and the three outgoing copper sheets (6) are staggered between the mounting rack (8) and the base (1), the bottom of the base (1) is provided with three independent wire grooves (10), each of which is used for mounting an incoming copper sheet (5).

4. The miniature fuse disconnect switch of claim 3, wherein: Three incoming copper sheets (5) are respectively electrically connected to an electrical connector (11), and three electrical connectors (11) are respectively used for electrically connecting to a corresponding busbar, both sides of each wire groove (10) are extended with a partition plate (12), and three electrical connectors (11) are respectively embedded in the corresponding partition plate (12), and each group of partition plates (12) is respectively buckled with an insulating cover (13) for shielding the corresponding electrical connector (11).

5. The miniature fuse disconnect switch of claim 1, wherein: The end surface of the cover (2) away from the base (1) is further provided with a transparent cover (14).

6. The miniature fuse disconnect switch of claim 5, wherein: Both sides of the transparent cover (14) are provided with a convex edge (15), and the cover (2) is provided with a clamping groove (16) matched with the convex edge (15), one side of the clamping groove (16) is provided with an opening (17), and the transparent cover (14) is inserted into the clamping groove (16) along the opening (17) through the convex edge (15).

7. The miniature fuse disconnect switch of claim 1, wherein: The base (1) further includes a micro switch (18), and the micro switch (18) is pressed down when the cover (2) is in the first state.

Images