CN216213246U

CN216213246U - Isolating switch fuse assembly

Info

Publication number: CN216213246U
Application number: CN202122138159.8U
Authority: CN
Inventors: 潘韩飞; 朱其姚; 钱永恒; 丁杰
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-04-05
Anticipated expiration: 2031-09-06
Also published as: EP4339991A1; WO2023029614A1

Abstract

The utility model relates to the technical field of low-voltage power distribution systems, in particular to an isolating switch fuse assembly. The isolator fuse subassembly includes at least one isolator fuse, the isolator fuse is including dismantling isolator and the fuse subassembly of connection, the fuse subassembly includes the fuse and is used for holding the protection box of fuse, it is used for right to be provided with on the protection box the fuse carries out radiating heat dissipation channel, just still be provided with on the protection box and observe the transparent window of fuse state. This isolator fuse subassembly can guarantee can not influence the normal operating in other return circuits when changing the fuse of a certain return circuit, and because isolator and the dismantlement of fuse subassembly are connected, can be convenient for change the fuse subassembly to realize the visual fuse state of in time observing through transparent window.

Description

Isolating switch fuse assembly

Technical Field

The utility model relates to the technical field of low-voltage power distribution systems, in particular to an isolating switch fuse assembly.

Background

In a low-voltage bus cabinet or a low-voltage switch cabinet, a molded case circuit breaker is generally arranged in each branch circuit to protect the circuit, when a short-circuit fault occurs in the branch circuit, the molded case circuit breaker automatically trips to cut off a short-circuit current, but when the molded case circuit breaker of a certain branch circuit needs to be replaced, a frame circuit breaker for controlling all the branch circuits needs to be disconnected, so that normal operation of other circuits is affected, and inconvenience is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an isolating switch fuse component which can ensure that the normal operation of other loops is not influenced when a fuse of a certain loop is replaced, can be conveniently replaced due to the detachable connection of an isolating switch and the fuse component, and can realize the visualization of the fuse through a transparent window so as to observe the state of the fuse in time.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an isolator fuse subassembly, includes at least one isolator fuse, the isolator fuse is including dismantling isolator and the fuse subassembly of connection, the fuse subassembly includes the fuse and is used for holding the protection box of fuse, it is used for right to be provided with on the protection box the fuse carries out radiating heat dissipation channel, just still be provided with on the protection box and observe the transparent window of fuse state.

Preferably, the number of the three fuses is set in one fuse assembly, the three fuses are arranged in the protection box at intervals along the length direction of the protection box, and a plurality of ventilation openings are uniformly arranged on two opposite side walls of the protection box around each fuse as a center to form a plurality of heat dissipation channels.

Preferably, the disconnecting switch fuse further comprises a connecting copper bar assembly, the connecting copper bar assembly comprises a connecting copper bar, and the connecting copper bar is respectively connected with the input terminal of the disconnecting switch and the output terminal of the fuse in a detachable mode.

Preferably, the connecting copper bar assembly further comprises a first protective cover which can be respectively abutted against the bottom end of the isolating switch and the top end of the protective box, the first protective cover comprises a first cover body and a first cover body which are detachably connected, and a first accommodating groove which can accommodate the connecting copper bar is formed in the first cover body; first lid physical stamina with first cover body joint blocks up first holding tank.

Preferably, the first cover body is provided with two first guide grooves which are respectively located on two sides of the first accommodating groove, one of the first cover body and the first cover body is provided with a first limiting hole, the other one of the first cover body and the first cover body is provided with a first buckle which can be matched with the first limiting hole, and the first cover body can slide in the first guide groove until the first buckle is clamped with the first limiting hole so that the first cover body is clamped with the first cover body.

Preferably, the disconnecting switch fuse further comprises a wiring copper bar assembly, the wiring copper bar assembly comprises a wiring copper bar, and the wiring copper bar is respectively detachably connected with the input terminal and the external cable of the fuse.

Preferably, the wiring copper bar assembly further comprises a second protective cover capable of being abutted against the bottom end of the protective box, the second protective cover comprises a second cover body and a second cover body which are detachably connected, and a second accommodating groove capable of accommodating the wiring copper bar is formed in the second cover body; the second cover body can with the second cover body joint blocks up the second holding tank.

Preferably, the second cover body is provided with two second guide grooves which are respectively positioned on two sides of the second accommodating groove, one of the second cover body and the second cover body is provided with a second limiting hole, the other one of the second cover body and the second cover body is provided with a second buckle which can be matched with the second limiting hole, and the second cover body can slide in the second guide groove until the second buckle is clamped with the second limiting hole so as to enable the second cover body to be clamped with the second cover body.

Preferably, the fuse assembly further comprises a fault indicator connected with the fuse, the fuse corresponds to the fault indicator one to one, and the state of the fuse can be judged through the fault indicator.

Preferably, the two opposite side walls of the protection box are respectively provided with a vent to form the heat dissipation channel.

Preferably, a plurality of the ventilation openings are circumferentially arranged on two opposite side walls of the protection box by taking the fuse as a center so as to form a plurality of the heat dissipation channels.

Preferably, the plurality of sets of the disconnecting switch fuses are arranged at intervals in a width direction of the protection box.

Has the advantages that: the utility model provides a fuse assembly of an isolating switch, which comprises a fuse, a first switch, a second switch and a third switch, wherein the fuse can quickly cut off a corresponding loop so as to improve the safety of the circuit compared with a circuit breaker; secondly, when a short-circuit fault occurs in a loop, the disconnection of the loop is controlled through a disconnecting switch detachably connected with the fuse component so as to directly replace the fuse component, the safety of replacing the fuse component is guaranteed, meanwhile, the influence on the normal operation of other loops is avoided, and the fuse is radiated through a radiating channel on a protection box so as to prolong the service life of the fuse as far as possible; finally, the state of the fuse can be observed in time through the transparent window so as to judge whether the fuse needs to be replaced, and the visualization of the plastic shell short circuiter can be realized. This isolator fuse subassembly can guarantee can not influence the normal operating in other return circuits when changing the fuse of a certain return circuit, and because isolator and the dismantlement of fuse subassembly are connected, can be convenient for change the fuse subassembly to realize the visual fuse state of in time observing through transparent window.

Drawings

Figure 1 is a schematic diagram of the structure of a disconnector fuse assembly according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a disconnecting switch fuse according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a disconnecting switch fuse provided in accordance with an embodiment of the present invention with the protective case, the first protective cover, and the second protective cover removed;

figure 4 is a side view of a fuse assembly provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic illustration of the unassembled first protective cover according to an embodiment of the present invention;

FIG. 6 is a schematic view of a second protective cover according to an embodiment of the present invention, shown unassembled;

FIG. 7 is a schematic structural diagram of a fault indicator in a first state according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a compartment fault indicator in a second state according to an embodiment of the present invention.

Wherein:

1. an isolation switch fuse;

11. an isolating switch;

12. a fuse assembly;

121. a fuse;

122. a protection box; 1221. a vent; 1222. a transparent window;

123. a fault indicator;

13. connecting the copper bar assembly;

131. connecting the copper bars;

132. a first protective cover;

1321. a first cover body; 13211. a first guide groove; 13212. a first buckle;

1322. a first cover body; 13221. a first limit hole;

14. a wiring copper bar assembly;

141. a wiring copper bar;

142. a second protective cover;

1421. a second cover body; 14211. a second guide groove; 14212. a second buckle;

1422. a second cover body; 14221. a second limiting hole;

2. an insulating spacer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 4, the present embodiment discloses an isolation switch fuse assembly, which includes at least one isolation switch fuse 1, the isolation switch fuse 1 includes an isolation switch 11 and a fuse assembly 12 that are detachably connected, the fuse assembly 12 includes a fuse 121 and a protection box 122 for accommodating the fuse 121, a heat dissipation channel for dissipating heat of the fuse 121 is disposed on the protection box 122, and a transparent window 1222 capable of observing the state of the fuse 121 is further disposed on the protection box 122.

Firstly, compared with a circuit breaker, the fuse 121 can rapidly cut off a corresponding loop to improve the safety of the circuit; secondly, when a short-circuit fault occurs in a loop, the disconnection of the loop is controlled by the isolating switch 11 detachably connected with the fuse component 12 so as to directly replace the fuse component 12, the safety of replacing the fuse component 12 is ensured, meanwhile, the normal operation of other loops is prevented from being influenced, and the fuse 121 is radiated by a radiating channel on the protection box 122 so as to prolong the service life of the fuse 121 as much as possible; finally, the state of the fuse 121 can be observed in time through the transparent window 1222 to judge whether the fuse 121 needs to be replaced, and the visualization of the molded case short-circuit device can also be realized. This isolator fuse subassembly can guarantee can not influence the normal operating in other return circuits when changing the fuse 121 of a certain return circuit, and because isolator 11 is connected with dismantling of fuse subassembly 12, can be convenient for change fuse subassembly 12 to realize the visual fuse 121 state of in time observing through transparent window 1222 to fuse 121.

Illustratively, a transparent window 1222 is disposed at a top end of the protective case 122.

In consideration of the need for replacing the fuse 121, the protection box 122 is formed by splicing two half protection covers, so as to avoid replacing the whole fuse assembly 12 and reduce the maintenance cost.

In this embodiment, the two opposite sidewalls of the protection box 122 are respectively provided with vents 1221 to form a heat dissipation channel, that is, the fuse 121 is located between the two vents, thereby ensuring the heat dissipation effect of the fuse 121.

Considering that the circuit is a three-phase ac circuit, as shown in fig. 3, three fuses 121 are provided in one fuse assembly 12, and the three fuses 121 are arranged in the protection box 122 at intervals along the length direction of the protection box 122 to correspond to A, B and the C phase, respectively.

A plurality of ventilation openings 1221 are circumferentially formed on two opposite side walls of the protection box 122 by centering on each fuse 121 to form a plurality of heat dissipation channels, so as to ensure the heat dissipation effect of each fuse 121 in the protection box 122.

Similarly, the top end of the protection box 122 is provided with three transparent windows 1222 arranged at intervals along the length direction of the protection box 122, and the transparent windows 1222 are in one-to-one correspondence with the fuses 121 and are located right above the corresponding fuses 121, so as to accurately determine the failed fuse 121 from the three fuses 121.

Specifically, as shown in fig. 3, the disconnecting switch fuse 1 further includes a connecting copper bar assembly 13, the connecting copper bar assembly 13 includes a connecting copper bar 131, and the connecting copper bar 131 is detachably connected to the input terminal of the disconnecting switch 11 and the output terminal of the fuse 121 through bolts. Of course, in other embodiments, other structures may be adopted to realize the detachable connection between the disconnecting switch 11 and the fuse 121, and the embodiment is not particularly limited.

It is understood that the number of output terminals of the disconnection switch 11 is the same as the number of fuses 121 in the protection box 122.

Further, as shown in fig. 4, the connecting copper bar assembly 13 further includes a first protection cover 132 capable of being abutted to the bottom end of the isolating switch 11 and the top end of the protection box 122, the first protection cover 132 includes a first cover body 1321 and a first cover body 1322 which are detachably connected, and a first accommodating groove capable of accommodating the connecting copper bar 131 is formed in the first cover body 1321; first lid 1322 can block up first holding tank with first cover 1321 joint, realizes the insulation protection from isolator 11's input terminal to fuse 121's output terminal, improves isolator fuse 1's safety in utilization.

Specifically, the first cover 1321 is provided with two first guide slots 13211 respectively located at two sides of the first receiving slot, one of the first cover 1321 and the first cover 1322 is provided with a first limiting hole 13221, the other one of the first cover 1321 and the first cover 1322 is provided with a first buckle 13212 capable of being matched with the first limiting hole 13221, and the first cover 1322 can slide in the first guide slot 13211 until the first buckle 13212 is buckled with the first limiting hole 13221 so that the first cover 1322 is buckled with the first cover 1321. Similarly, when the first cover 1322 needs to be separated from the first cover 1321, the first cover 1322 is slid in the opposite direction to separate the first buckle 13212 from the first limiting hole 13221.

Illustratively, in order to ensure the stability of the clamping, the first limiting hole 13221 and the corresponding first buckle 13212 are provided in plurality.

In this embodiment, the disconnecting switch fuse 1 further includes a wiring copper bar assembly 14, the wiring copper bar assembly 14 includes a wiring copper bar 141, and the wiring copper bar 141 is detachably connected to the input terminal of the fuse 121 and the external cable, respectively. Of course, in other embodiments, other structures may be adopted to realize the detachable connection of the fuse 121 and the external cable, and the embodiment is not particularly limited.

As shown in fig. 6, the wiring copper bar assembly 14 further includes a second protection cover 142 capable of abutting against the bottom end of the protection box 122, the second protection cover 142 includes a second cover body 1421 and a second cover body 1422 that are detachably connected, and a second receiving groove capable of receiving the wiring copper bar 141 is disposed in the second cover body 1421; the second lid 1422 can block up the second holding tank with the second cover body 1421 joint and shutoff, realizes the insulating protection from the input terminal of fuse 121 to the output terminal of outside cable, improves isolator fuse 1's safety in utilization.

Specifically, the second cover 1421 is provided with two second guide grooves 14211 respectively located at two sides of the second receiving groove, one of the second cover 1421 and the second cover 1422 is provided with a second limiting hole 14221, the other one is provided with a second buckle 14212 capable of being matched with the second limiting hole 14221, and the second cover 1422 can slide in the second guide groove 14211 until the second buckle 14212 is engaged with the second limiting hole 14221, so that the second cover 1422 is engaged with the second cover 1421. Similarly, when the second cover 1422 needs to be detached from the second cover 1421, the second cover 1422 is slid in the opposite direction to detach the second buckle 14212 from the second limiting hole 14221.

For example, in order to ensure the stability of the clamping, a plurality of second limiting holes 14221 and corresponding second buckles 14212 are provided.

As shown in fig. 7, in order to facilitate the inspection of the state of the fuse 121 (i.e., whether the fuse of the fuse 121 is blown or not) through the transparent window 1222, the fuse assembly 12 further includes a fault indicator 123 connected to the fuse 121, the fuse 121 and the fault indicator 123 correspond to each other in a one-to-one manner, and the state of the fuse 121 can be determined by the fault indicator 123.

Specifically, the fault indicator 123 is a spring, one end of the spring is disposed at the top end of the fuse 121, and the other end of the spring is connected to the fuse, and when the fuse is not fused, as shown in fig. 7, the spring is in a first state, that is, the spring is completely attached to the top end of the fuse 121; when the fuse wire is blown out due to a short circuit, as shown in fig. 8, the elastic sheet is in the second state, and one end of the elastic sheet connected with the fuse wire loses fastening force due to the fact that the fuse wire is blown out, so that the elastic sheet is far away from the fuse 121, namely, one end of the elastic sheet tilts relative to the top end of the fuse 121, and therefore a maintainer can visually judge the state of the fuse 121.

In this embodiment, in order to control the states of the multiple loops respectively, the disconnecting switch fuse assembly includes multiple disconnecting switch fuses 1, and the multiple disconnecting switch fuses 1 are arranged at intervals along the width direction of the protection boxes 122, so as to avoid the mutual interference of the heat dissipation channels on the two adjacent protection boxes 122, and ensure the heat dissipation effect of each fuse 121 as much as possible.

Wherein, isolator fuse subassembly still includes insulating barrier 2, insulating barrier 2 and every second safety cover 142 bottom all butt for the output connecting portion with external cable are separated with isolator fuse 1 other parts, improve the security as far as possible.

When the device is used, the current of each backflow is input from an external cable and sequentially passes through the corresponding wiring copper bar 141, the fuse 121, the connecting copper bar 131 and the isolating switch 11, and the confluence is realized on the busbar. When a short-circuit fault occurs in a loop, the fuse 121 corresponding to the loop is blown to protect the circuit safety, and the fault indicator 123 on the fuse 121 pops up to indicate the location of the fault. When a maintenance person carries out maintenance, the specific position of the failed fuse 121 is determined through the transparent window 1222 on the protection box 122, the connection between the circuit and the bus bar is cut off by rotating the handle of the isolation switch 11 corresponding to the circuit, and the first protection cover 132 and the second protection cover 142 can be quickly detached by respectively sliding the first cover 1322 and the second cover 1422, so that the bolt is loosened to integrally take out the fuse assembly 12 for subsequent replacement.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. The utility model provides an isolator fuse subassembly, its characterized in that includes at least one isolator fuse (1), isolator fuse (1) is including dismantling isolator (11) and fuse subassembly (12) of connection, fuse subassembly (12) include fuse (121) and are used for holding protection box (122) of fuse (121), it is used for right to be provided with on protection box (122) fuse (121) carry out radiating heat dissipation channel, just still be provided with on protection box (122) and observe transparent window (1222) of fuse (121) state.

2. The disconnecting switch fuse assembly according to claim 1, wherein three of said fuses (121) are provided in one of said fuse assemblies (12), and three of said fuses (121) are arranged in said protective box (122) at intervals along a length direction of said protective box (122).

3. The disconnector fuse assembly of claim 1, characterized in that the disconnector fuse (1) further comprises a connection copper bar assembly (13), the connection copper bar assembly (13) comprising a connection copper bar (131), the connection copper bar (131) being detachably connected with the input terminal of the disconnector (11) and the output terminal of the fuse (121), respectively.

4. The disconnector fuse assembly of claim 3, characterized in that the connecting copper bar assembly (13) further comprises a first protective cover (132) capable of abutting against the bottom end of the disconnector (11) and the top end of the protective box (122), respectively, the first protective cover (132) comprises a first cover body (1321) and a first cover body (1322) which are detachably connected, and a first receiving groove capable of receiving the connecting copper bar (131) is formed in the first cover body (1321); the first cover body (1322) can be clamped with the first cover body (1321) and is blocked with the first accommodating groove.

5. The disconnecting switch fuse assembly according to claim 4, wherein the first cover body (1321) is provided with two first guiding slots (13211) respectively located at two sides of the first receiving slot, one of the first cover body (1321) and the first cover body (1322) is provided with a first limiting hole (13221), and the other one of the first cover body (1321) and the first cover body (1322) is provided with a first buckle (13212) capable of being matched with the first limiting hole (13221), and the first cover body (1322) can slide in the first guiding slot (13211) until the first buckle (13212) is buckled with the first limiting hole (13221) so that the first cover body (1322) is buckled with the first cover body (1321).

6. The disconnector fuse assembly of claim 1, characterized in that the disconnector fuse (1) further comprises a wiring copper bar assembly (14), the wiring copper bar assembly (14) comprising a wiring copper bar (141), the wiring copper bar (141) being detachably connected with the input terminals of the fuse (121) and an external cable, respectively.

7. The disconnector fuse assembly of claim 6, characterized in that the wiring copper bar assembly (14) further comprises a second protective cover (142) capable of abutting against the bottom end of the protective box (122), the second protective cover (142) comprises a second cover body (1421) and a second cover body (1422) which are detachably connected, and a second accommodating groove capable of accommodating the wiring copper bar (141) is arranged in the second cover body (1421); the second cover body (1422) can be clamped with the second cover body (1421) and is blocked in the second accommodating groove.

8. The isolating switch fuse assembly according to claim 7, wherein the second cover body (1421) is provided with two second guide grooves (14211) respectively located at two sides of the second receiving groove, one of the second cover body (1421) and the second cover body (1422) is provided with a second limiting hole (14221), and the other one of the second cover body (1421) and the second cover body (1422) is provided with a second buckle (14212) capable of being matched with the second limiting hole (14221), and the second cover body (1422) is capable of sliding in the second guide groove (14211) until the second buckle (14212) is buckled with the second limiting hole (14221) so as to buckle the second cover body (1422) with the second cover body (1421).

9. The disconnect fuse assembly of claim 1, wherein the fuse assembly (12) further comprises fault indicators (123) connected to the fuses (121), the fuses (121) corresponding one-to-one to the fault indicators (123), the fuse (121) state being determinable by the fault indicators (123).

10. The isolating switch fuse assembly of claim 1, characterized in that the protective box (122) has vents (1221) formed in opposite side walls thereof to form the heat dissipating channels.

11. The disconnecting switch fuse assembly according to claim 10, wherein a plurality of the ventilation openings (1221) are circumferentially provided on both opposite side walls of the protective box (122) centering around the fuse (121) to form a plurality of the heat dissipation channels.

12. The disconnector fuse assembly of any one of claims 1 to 11, characterized in that a plurality of groups of the disconnector fuses (1) are arranged at intervals in a width direction of the protection box (122).