Vertical fuse disconnecting switch

Abstract

A vertical fuse disconnecting switch comprises a base, at least one fusing unit is arranged in the base, the fusing unit is provided with a wire outlet end, and the wire outlet end is made of a copper bar arranged in a bent shape. A wire outlet end of the fusing unit is changed from a traditional flexible connection structure into a copper bar hard connection structure which is arranged in a bending shape, so that a conductive path is changed from a plurality of strands of stranded wires or soft copper strips into an integrally formed metal conductor. On one hand, the hard connection copper bar is simple in structure, few in processing links, and capable of reducing the material usage amount, thereby effectively reducing the manufacturing cost. And on the other hand, the copper bar serves as an overall conductor, the cross section is complete, the conductive area is large, the connecting end face is stable and reliable, the problems of contact oxidation, local breakage and the like easily occurring in flexible connection can be avoided, the contact resistance at the connecting position is remarkably reduced, and the temperature rise of a conductive loop in the operation process is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vertical fuse disconnecting switch belongs to fuse disconnecting switch field. BACKGROUND

[0002] The fuse disconnecting switch is used as the power distribution protection and isolation device in the power system. In the prior art, in order to adapt to the mechanism movement in the switch operation process and the installation tolerance, the conductive loop adopts the soft connection structure composed of multiple copper stranded wires or soft copper strips. The soft connection can provide necessary flexibility to compensate displacement, but its structure is relatively complex, the processing procedure is more, the material consumption is large, and the overall cost is higher.

[0003] In addition, in the long-term current-carrying operation process, due to the relatively dispersed conductor cross section and limited contact area, the soft connection is easy to form switch contact oxidation and connection breakage at the connection end, which causes the resistance to increase, and thus the temperature rise at the contact point is too high. Under the high current or long-time operation condition, the heating characteristics of the soft connection are more prominent, which may affect the conduction performance and safety stability of the disconnecting switch.

[0004] With the improvement of the use standard of the fuse disconnecting switch, the cost pressure and temperature rise problem caused by the fuse disconnecting switch are more and more obvious, and therefore a conductive connection mode capable of simplifying the structure, reducing the manufacturing cost and improving the temperature rise performance is required. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the shortcomings and deficiencies in the prior art and provides a vertical fuse disconnecting switch.

[0006] A vertical fuse disconnecting switch, comprising a base, at least one fuse unit is arranged in the base, the fuse unit is provided with an outgoing line end, and the outgoing line end is made of a copper bar arranged in a bent shape.

[0007] Through the technical scheme, the outgoing line end of the fuse unit is changed from the traditional soft connection structure to the copper bar hard connection structure arranged in a bent shape, so that the conductive path is changed from the multiple stranded wires or soft copper strips to the integral metal conductor. On the one hand, the structure of the hard connection copper bar is simple, and the processing steps are less, so that the material usage amount can be reduced, thereby effectively reducing the manufacturing cost. On the other hand, the copper bar is used as an integral conductor, the cross section is complete, the conductive area is large, and the connection end surface is stable and reliable, so that the problems such as contact oxidation and local breakage prone to occur in the soft connection can be avoided, the contact resistance at the connection is significantly reduced, and the temperature rise of the conductive loop in the operation process is obviously improved.

[0008] Further, the copper bar is made of a hard alloy copper bar.

[0009] Through the technical scheme, the copper bar is made of hard alloy copper bar, so that the outgoing end electrically conductive part has good electrical conductivity, higher mechanical strength and deformation resistance. The hard alloy copper bar is not easy to bend, fatigue damage or local deformation under the conditions of long-term bearing current, mechanical stress or environmental vibration, thereby ensuring the stability of the connection structure.

[0010] Further, the base is provided with three fusing units, including a first fusing unit, a second fusing unit and a third fusing unit, and the first fusing unit, the second fusing unit and the third fusing unit are respectively connected with a first outgoing end, a second outgoing end and a third outgoing end.

[0011] Through the technical scheme, the disconnector can simultaneously perform fusing protection and isolation control on three-phase lines. By independently arranging three-phase fusing units and respectively configuring corresponding outgoing ends, the phase conductive circuits are not interfered with each other, avoiding the influence of single-phase fault on other phases, and improving the safety and reliability of the overall power distribution system. In addition, the structure of multiple fusing units is clear, facilitating installation, maintenance and replacement, and is conducive to improving the maintenance efficiency of the equipment.

[0012] Further, the first outgoing end, the second outgoing end and the third outgoing end are all arranged in a U shape.

[0013] Through the technical scheme, the U-shaped copper bar can provide larger contact area and more reliable installation and fixing area while maintaining the overall conductive cross section, which is conducive to improving the mechanical strength and stability of the connection terminal. The bending shape of the structure can also effectively avoid the interference of straight copper bars in the case of limited installation space, so that the outgoing end is more suitable for the layout requirements of the base and the fusing unit.

[0014] Further, the first outgoing end is arranged in an upward bending manner, and the second outgoing end and the third outgoing end are arranged in a bending manner opposite to the first outgoing end.

[0015] Through the technical scheme, by bending the outgoing ends of each phase in different directions, the contact, interference or insufficient distance between phases caused by installation tolerance of three-phase copper bars can be effectively avoided, thereby improving the interphase insulation safety distance and reducing the risk of interphase short circuit or discharge.

[0016] Further, the length of the second outgoing end is less than that of the third outgoing end.

[0017] Through the technical scheme, the second and third outgoing terminals form a stepped layout in installation position and space occupation. Through the length difference, mutual interference or too close problems in the installation process can be effectively avoided, thereby further ensuring the safety of the phase distance. Meanwhile, the design of different lengths facilitates the misalignment connection of external cables or terminals, makes the wiring trend clearer, and improves the convenience of installation and maintenance.

[0018] Further, at least one connecting contact is fixed to the side of the outgoing terminal extending out of the base.

[0019] Through the technical scheme, by arranging the connecting contact on the outgoing terminal extension, the conductive contact area can be increased, the contact resistance at the connection is reduced, the conductive path is more stable, and the temperature rise during operation is further reduced.

[0020] Further, two connecting contacts are fixed to the side of the first, second and third outgoing terminals extending out of the base.

[0021] Through the technical scheme, by arranging two connecting contacts, the effective contact area between the external line and the outgoing terminal can be significantly increased, the local resistance rise caused by poor contact of a single contact point can be reduced, and the conductive performance is further improved and the operating temperature rise is effectively reduced.

[0022] Further, three connecting contacts are fixed to the side of the first, second and third outgoing terminals extending out of the base.

[0023] Through the technical scheme, by using three connecting contacts, the overall conductive contact area can be significantly increased, and compared with two connecting contacts, it is suitable for a large current working environment.

[0024] The beneficial effects of the utility model are as follows: by changing the outgoing terminal of the fuse unit from the traditional flexible connection structure to the copper bar hard connection structure arranged in a bent shape, the conductive path is changed from a plurality of twisted wires or soft copper strips to an integrally formed metal conductor. On the one hand, the hard connection copper bar has simple structure and less processing steps, which can reduce the material usage and effectively reduce the manufacturing cost. On the other hand, the copper bar as an integral conductor has complete cross section, large conductive area and stable and reliable connecting end face, which can avoid the problems of contact oxidation and local breakage of flexible connection, significantly reduce the contact resistance at the connection, and obviously improve the temperature rise of the conductive loop during operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0026] Fig. 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model;

[0027] Fig. 2 This is a schematic diagram of another embodiment of the present invention;

[0028] In the diagram, 1 is the base; 2 is the first fuse unit; 21 is the first outgoing wire terminal; 3 is the second fuse unit; 31 is the second outgoing wire terminal; 4 is the third fuse unit; 41 is the third outgoing wire terminal; and 5 is the connecting contact. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0031] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0032] like Figs. 1-2 As shown, this is an embodiment of a vertical fuse disconnect switch of the present invention, including a base 1, wherein at least one fuse unit is provided in the base 1, the fuse unit is provided with a lead-out end, and the lead-out end is made of a copper busbar arranged in a bent shape.

[0033] By the technical scheme, the outgoing line end of the fuse unit is changed from a traditional soft connection structure to a copper bar hard connection structure arranged in a bent shape, so that the conductive path is changed from a plurality of stranded wires or a soft copper strip to a whole formed metal conductor. On the one hand, the hard connection copper bar has a simple structure, fewer processing links, and can reduce the material usage, thereby effectively reducing the manufacturing cost. On the other hand, the copper bar is a whole conductor, has a complete cross section, a large conductive area, and a stable and reliable connection end face, can avoid problems such as contact oxidation and local breakage of the soft connection, significantly reduces the contact resistance of the connection, and significantly improves the temperature rise of the conductive loop in the operation process.

[0034] The copper bar is made of a hard alloy copper bar.

[0035] By the technical scheme, the copper bar is made of a hard alloy copper bar, so that the outgoing line end conductive piece has good conductive performance, higher mechanical strength and better deformation resistance. The hard alloy copper bar is not easy to bend, fatigue damage or locally deform under the conditions of long-term bearing current, mechanical stress or environmental vibration, thereby ensuring the stability of the connection structure. The surface of the copper bar can be subjected to oxidation prevention treatment or plating treatment to further reduce the contact resistance fluctuation and prolong the service life. As an alternative embodiment, a person skilled in the art can also use a high-conductive pure copper combined with surface tin plating or silver plating treatment to consider the conductivity and mechanical strength.

[0036] The base 1 is provided with three fuse units, including a first fuse unit 2, a second fuse unit 3 and a third fuse unit 4, and the first fuse unit 2, the second fuse unit 3 and the third fuse unit 4 are respectively connected with a first outgoing line end 21, a second outgoing line end 31 and a third outgoing line end 41.

[0037] By the technical scheme, the disconnector can simultaneously perform fuse protection and isolation control on three-phase lines. By independently arranging the three-phase fuse units and respectively configuring corresponding outgoing line ends, the conductive loops of the phases are not interfered with each other, the influence of single-phase failure on other phases is avoided, and the safety and reliability of the overall power distribution system are improved. In addition, the structure of the multiple fuse units is clear, which is convenient for installation, maintenance and replacement, and is conducive to improving the maintenance efficiency of the equipment. A person skilled in the art can also arrange two or more fuse units in some applications to meet different circuit protection requirements.

[0038] The first outgoing line end 21, the second outgoing line end 31 and the third outgoing line end 41 are all arranged in a U-shaped manner.

[0039] Through the technical scheme, the U-shaped copper bar can provide a larger contact area and a more reliable mounting and fixing area while maintaining the overall conductive section, which is conducive to improving the mechanical strength and stability of the connection terminal. The bent shape of the structure can also effectively avoid interference of the straight copper bar in the case of limited installation space, so that the outlet terminal is more suitable for the layout requirements of the base 1 and the fuse unit. As an alternative embodiment, a person skilled in the art can also slightly widen or deepen the U-shaped design to adapt to different external wiring methods.

[0040] The first outlet terminal 21 is arranged in an upward bending manner, and the second outlet terminal 31 and the third outlet terminal 41 are arranged in a bending manner in the opposite direction of the first outlet terminal 21.

[0041] Through the technical scheme, by bending the outlet terminals of each phase in different directions, the contact, interference or insufficient distance between phases caused by installation tolerance of the three-phase copper bars can be effectively avoided, thereby improving the inter-phase insulation safety distance and reducing the risk of inter-phase short circuit or discharge. As an alternative embodiment, a person skilled in the art can adjust the bending angle and direction according to the wiring requirements, but maintain the three-phase staggered arrangement.

[0042] The length of the second outlet terminal 31 is less than the length of the third outlet terminal 41.

[0043] Through the technical scheme, the second and third outlet terminals 41 form a differentiated stepped layout in terms of installation position and space occupation. By distinguishing the lengths, the problem of mutual interference or excessive proximity during installation can be effectively avoided, thereby further ensuring the safety of the inter-phase distance. At the same time, the design of different lengths facilitates the staggered connection of external cables or terminals, making the wiring path clearer and improving the convenience of installation and maintenance. As an alternative embodiment, a person skilled in the art can adjust the length ratio according to the actual space, but should maintain different lengths to achieve staggered installation.

[0044] At least one connecting contact 5 is fixed to the side of the outlet terminal extending out of the base 1.

[0045] Through the technical scheme, by providing a connecting contact 5 on the outlet terminal extension, the conductive contact area can be increased, the contact resistance at the connection can be reduced, the conductive path can be more stable, and the temperature rise during operation can be further reduced.

[0046] Different from the above-mentioned embodiments, two connecting contacts 5 are fixed to the side of the first outlet terminal 21, the second outlet terminal 31 and the third outlet terminal 41 extending out of the base 1.

[0047] Through the technical scheme, by setting two connecting contacts 5, the effective contact area between the external line and the outgoing line end can be significantly increased, the local resistance increase caused by single contact poor contact is reduced, and the conduction performance is further improved and the operation temperature rise is effectively reduced.

[0048] The embodiment is different from the above-mentioned embodiment, and the first outgoing line end 21, the second outgoing line end 31 and the third outgoing line end 41 fixed with three connecting contacts 5 on one side of the base 1.

[0049] Through the technical scheme, by adopting three connecting contacts 5, not only the overall conduction contact area can be significantly increased, compared with two connecting contacts 5, it is suitable for large current working environment.

[0050] The above only discloses the preferred embodiment of the utility model, of course, cannot limit the right scope of the utility model with this, therefore, the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

[0051] Although the utility model has been described with reference to a number of specific embodiments, it should be understood that the utility model is not limited to the disclosed specific embodiments. The utility model is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A vertical fuse disconnect switch, characterized in that: The device includes a base, which contains at least one fuse unit. Each fuse unit has a lead-out terminal made of a copper busbar arranged in a bent shape. The base contains three fuse units, including a first fuse unit, a second fuse unit, and a third fuse unit. The first fuse unit, the second fuse unit, and the third fuse unit are respectively connected to the first lead-out terminal, the second lead-out terminal, and the third lead-out terminal. The first lead-out terminal, the second lead-out terminal, and the third lead-out terminal are all arranged in a U-shape.

2. The upright fuse disconnector as described in claim 1, characterized in that: The copper busbar is made of hard alloy copper busbar.

3. The upright fuse disconnector as described in claim 1 or 2, characterized in that: The first outgoing wire is bent upwards, while the second and third outgoing wires are bent in the opposite direction to the first outgoing wire.

4. The upright fuse disconnector as described in claim 3, characterized in that: The length of the second outgoing wire is less than that of the third outgoing wire.

5. The upright fuse disconnector as described in claim 1, characterized in that: At least one connecting contact is fixed to the side of each cable outlet that extends out of the base.

6. The upright fuse disconnector as described in claim 4, characterized in that: Two connecting heads are fixed on one side of the first, second, and third cable outlets that extend out of the base.

7. The upright fuse disconnector as described in claim 1, characterized in that: Three connecting contacts are fixed to one side of the first, second, and third cable outlets that extend out of the base.

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