Copper sheet flexible connection structure of switchgear

Abstract

The utility model discloses a copper sheet flexible connection structure of switch equipment, which comprises two opposite hard connection parts, a flexible connection part is arranged between the two hard connection parts, the end parts of a plurality of connection conductors of the flexible connection part are sequentially overlapped and fixed on the hard connection part, the hard connection part comprises a left end and a right end which are opposite, and the left end and the right end are fixed on the left end and the right end respectively. The plurality of connecting conductors are sequentially arranged on the hard connecting part between the left end and the right end, and the connecting conductor closest to the left end and / or the right end is cut off, so that a plurality of protective sheets are formed. The copper strip on the outermost side of the flexible connection structure is cut off from the middle of the flexible connection part to form the protection sheets at the two ends. The protection sheet is located outside the hard connection part and extends out of the hard connection part by a certain distance. Due to the fact that the protection piece is cut off from the middle of the flexible connection part, the protection piece cannot be stressed to deform in the moving process of the flexible connection structure, the phenomenon that the protection piece is broken at the fusion welding connection position of the free end and the two ends is avoided, and the service life of the flexible connection structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment, in particular to a copper sheet soft connection structure of a switch equipment. Background Art

[0002] Due to the requirements of various forms of movement, existing switchgear basically uses a flexible connection structure. The flexible connection structure is composed of multiple layers of copper strips stacked up and down to form a copper flexible connection conductor. In addition to carrying current, it also serves as a moving part, connected to the moving mechanism of the switchgear to complete the opening and closing actions of the switchgear, and is an important part of the switchgear.

[0003] During the multiple opening and closing processes of the switchgear, the flexible connection structure is prone to breakage at the free end and the welded joint at both ends due to excessive bending times. Once the flexible connection structure breaks too much, it will affect the current carrying capacity of the switchgear and shorten the service life of the switchgear. In addition, the flexible connection structure generally breaks at the root of the welded joint, and the broken copper sheet will sag due to gravity, seriously affecting the insulation performance of the switchgear, and it is easy to cause insulation breakdown, short circuit and other safety accidents. Therefore, it is of great significance to improve the service life of the flexible connection and reduce the breakage and damage of the flexible connection.

[0004] For example, the authorization announcement number CN214797947U discloses a new type of soft connection structure for a switchgear, including a hard connection part, a soft connection part and a protection device; the hard connection part and the soft connection part are connected to each other, and the protection device is arranged on the outside of the connection between the hard connection part and the soft connection part; the protection device is fitted with the hard connection part and the end of the soft connection part; the protection device extends outward at a smooth angle. However, the soft connection structure needs to add a separate protection device, which increases the product cost; and it also cannot solve the problem that after the root of the soft connection structure is broken by fusion welding, the broken copper sheet sags due to gravity, seriously affecting the insulation performance of the switchgear, and easily causing safety accidents such as insulation breakdown and short circuit.

[0005] The authorization announcement number CN202259819U discloses a copper sheet connector, which includes a plurality of copper sheets, which are welded together at two ends of the copper sheets, and silver-plated copper sheets are respectively welded on the welding surfaces of the two outer copper sheets welded together. However, the outermost layer of the copper sheet connector lacks protection and is easily broken at the root of the fusion welding connection, resulting in a short service life.

[0006] The copper flexible connecting conductor with composite tape disclosed in the authorization announcement number CN207490149U includes a copper tape and a composite tape; multiple layers of copper tape are stacked up and down to form a copper flexible connecting conductor; the composite tape is applied to the functional surface of the copper flexible connecting conductor and hot-pressed and welded; wherein the composite tape is a copper-silver composite tape or a copper-nickel composite tape, and the silver or nickel is located on the outside of the copper layer and directly contacts the external environment. However, after the outermost layer of the copper flexible connecting conductor with composite tape is broken at the root of the fusion welding connection, it will affect the insulation performance of the switchgear and easily cause safety accidents such as insulation breakdown and short circuit. Summary of the invention

[0007] Purpose of the invention: In order to overcome the deficiencies of the above-mentioned prior art, the present application provides a copper sheet soft connection structure of a switch device, which solves the problems of poor safety and reliability during the use of the switch device.

[0008] Technical solution: The utility model provides a copper sheet soft connection structure of a switch device, which structure includes: two opposite hard connection parts, a soft connection part is arranged between the two hard connection parts, the soft connection part includes: multiple connecting conductors, the ends of the multiple connecting conductors are sequentially stacked and fixed on the hard connection part, the hard connection part includes a relative left end and a right end, and the multiple connecting conductors are sequentially arranged on the hard connection part from the left end to the right end, and the connecting conductors closest to the left end and / or the right end are cut off to form multiple protective sheets.

[0009] Further, including:

[0010] The protection sheet is obtained by cutting off one or two connecting conductors closest to the left end and / or the right end of the hard connecting part.

[0011] Further, including:

[0012] The length of the protective sheet is less than half the length of the other connecting conductors away from the left and right ends, that is, the length L of the protective sheet i Comply with L i ≤min{1 / 2d1,1 / 2d2,...,1 / 2d N}, wherein i∈[1,M], M is the total number of protection sheets, and N is the total number of other connecting conductors.

[0013] The thickness of the protection sheet is 0.1 mm or 0.05 mm.

[0014] Further, including:

[0015] The connecting conductor is one or more of a copper-silver composite strip, a copper strip and a copper-nickel composite strip.

[0016] Further, including:

[0017] A protective device is also provided on the outer side of the protective sheet, and the protective device is fitted with the protective sheet on the corresponding side and extends outward at a smooth angle.

[0018] Further, including:

[0019] The protection device extends outwardly by a distance exceeding the distance that the corresponding side protection sheet extends outwardly.

[0020] Further, including:

[0021] The protective device is made of copper or rubber.

[0022] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0023] (1) The purpose of the present application is to provide a copper sheet soft connection structure of a switchgear, in which the outermost copper strip of the soft connection structure is cut off from the middle of the soft connection part to form protective sheets at both ends. The protective sheet is located on the outside of the hard connection part and extends a certain distance from the hard connection part. Since the protective sheet is cut off from the middle of the soft connection part, the protective sheet will not be deformed by the force applied to the soft connection structure during movement, thereby preventing the protective sheet from breaking at the free end and the welded connection at both ends, thereby improving the service life of the soft connection structure. Moreover, since the distance that the protective sheet extends out of the hard connection part is relatively short, after the root of the welded connection breaks, the protective sheet will fall off as a whole, and the copper sheet will not sag due to gravity, affecting the insulation performance of the switchgear, causing insulation breakdown, short circuit and other safety accidents, thereby improving the safety and reliability of the switchgear during use.

[0024] (2) The utility model is further provided with a protection device on the basis of the protection sheet, and the distance extended outward by the protection device is longer than that of the protection sheet, thereby further improving the safety performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of a copper sheet soft connection structure of a switch device described in the utility model;

[0027] Figure 2 This is a schematic diagram of the copper sheet soft connection structure of the switch device of the prior art described in the utility model;

[0028] Figure 3This is a schematic diagram of a copper sheet soft connection structure of another switch device described in the utility model;

[0029] Figure 4 This is a usage example diagram of a copper sheet soft connection structure of a switch device described in the utility model. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0034] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Due to the requirements of various forms of movement, existing switchgear basically uses a flexible connection structure. The flexible connection structure is composed of multiple layers of copper strips stacked up and down to form a copper flexible connection conductor. In addition to carrying current, it also serves as a moving part, connected to the moving mechanism of the switchgear to complete the opening and closing actions of the switchgear, and is an important part of the switchgear.

[0037] During the multiple opening and closing processes of the switchgear, the flexible connection structure is prone to breakage at the free end and the welded joint at both ends due to excessive bending times. Once the flexible connection structure breaks too much, it will affect the current carrying capacity of the switchgear and shorten the service life of the switchgear. In addition, the flexible connection structure generally breaks at the root of the welded joint, and the broken copper sheet will sag due to gravity, seriously affecting the insulation performance of the switchgear, and it is easy to cause insulation breakdown, short circuit and other safety accidents. Therefore, it is of great significance to improve the service life of the flexible connection and reduce the breakage and damage of the flexible connection.

[0038] The object of the present invention is to provide a copper sheet soft connection structure of a switch device, in which the outermost copper strip of the soft connection structure is cut off from the middle of the soft connection part to form protective sheets at both ends. The protective sheet is located on the outside of the hard connection part and extends a certain distance from the hard connection part. Since the protective sheet is cut off from the middle of the soft connection part, the protective sheet will not be deformed by the force applied to the soft connection structure during movement, thereby preventing the protective sheet from breaking at the free end and the fusion-welded connection at both ends, thereby improving the service life of the soft connection structure. Moreover, since the distance that the protective sheet extends out of the hard connection part is relatively short, after the root of the fusion-welded connection breaks, the protective sheet will fall off as a whole, and the copper sheet will not sag due to gravity, affecting the insulation performance of the switch device and causing safety accidents such as insulation breakdown and short circuit, thereby improving the safety and reliability of the switch device during use. Specifically:

[0039] First, if Figure 1 and 4As shown, the present application discloses a copper sheet soft connection structure of a switch device, which structure includes: two opposite hard connection parts 1, a connecting copper bus 5 is fitted with the hard connection part 1, a soft connection part 2 is arranged between the two hard connection parts 1, and the soft connection part 2 includes: multiple connecting conductors 21, the ends of the multiple connecting conductors 21 are sequentially stacked and fixed on the hard connection part 1, the hard connection part 1 includes a relative left end 11 and a right end 12, and the multiple connecting conductors 21 are sequentially arranged on the hard connection part 1 from the left end 11 to the right end 12, and the connecting conductor 21 closest to the left end 11 and / or the right end 12 is cut off to form multiple protection sheets 3, that is, the protection sheet 3 can be arranged on one side or both sides of the hard connection part 1. If it is arranged on one side, it is 2 protection sheets, and if it is arranged on both sides, it is 4 protection sheets.

[0040] Each protective sheet 3 is obtained by cutting off one or two connecting conductors 21 closest to the left end 11 and / or the right end 12 of the hard connection part. In a specific embodiment, the protective sheet 3 can be obtained by cutting off one connecting conductor 21 at the leftmost end of the hard connection part, or by cutting off two connecting conductors at the leftmost end of the hard connection part, and when the two connecting conductors at the leftmost end are cut off, the cut ends can be welded to fix the ends together, which can further improve the life of other connecting conductors. It can also be achieved that: the protective sheet 3 can be obtained by cutting off a connecting conductor 21 at the rightmost end of the hard connection part, and can also be obtained by cutting off the two connecting conductors at the rightmost end of the hard connection part, and when the two connecting conductors at the rightmost end are cut off, the cut ends can be welded to fix their ends together. It can also be achieved that: the protective sheet 3 can be obtained by cutting off a connecting conductor 21 at the leftmost and rightmost ends of the hard connection part, and can also be obtained by cutting off the two connecting conductors at the leftmost and rightmost ends of the hard connection part respectively, and when the two connecting conductors at the leftmost and rightmost ends are cut off, the ends of the two connecting conductors on the corresponding sides of the cut can be welded to fix their ends together.

[0041] In summary, the copper sheet soft connection structure of the switchgear mainly includes a hard connection part 1, a soft connection part 2 and a protective sheet 3. The hard connection part 1 and the soft connection part 2 are formed by stacking multiple layers of copper tapes up and down to form a copper soft connection conductor. The hard connection part 1 and the soft connection part 2 are connected to each other, and the hard connection part 1 is located at both ends of the soft connection part 2. The outermost copper tape of the copper soft connection conductor is cut off from the middle of the soft connection part 2 to form a protective sheet 3. The protective sheet 3 is located on the outside of the hard connection part 1 and extends out of the hard connection part 1 for a certain distance. Specifically, after being cut off from the middle, it is trimmed according to the actual situation to cut the length of the protective sheet to an appropriate length.

[0042] Conventional copper sheet soft connection structure, such as Figure 2As shown, due to the relative displacement between the two hard connection parts 1, the copper belt pressed by the fusion welding will break due to repeated stress deformation at the fusion welding point. The broken copper belt will affect the life of the switch device and cause the insulation of the switch device to fail. Therefore, the protective sheet 3 added in the present application has been cut off in the middle of the soft connection part 2, which can reduce the stress deformation caused by the displacement, prevent the copper belt from breaking, and increase the life of the copper sheet soft connection. In addition, since the distance that the protective sheet 3 extends out of the hard connection part 1 is short, even if the protective sheet 3 breaks, it will not affect the insulation capacity of the switch device. The distance that the protective sheet 3 extends out of the hard connection part 1 can be limited by the following conditions:

[0043] In one embodiment of the present application, the length of the protective sheet 3 is less than half the length of the other connecting conductors 22 away from the left end 11 and the right end 12, that is, the length L of the protective sheet i Comply with L i ≤min{1 / 2d1,1 / 2d2,...,1 / 2d N}, wherein i∈[1,M], M is the total number of protection sheets, and N is the total number of other connecting conductors 22.

[0044] In one embodiment of the present application, since the protective sheet 3 is obtained by connecting the conductor 21, it naturally extends outward at a smooth angle with the hard connection portion, and each connecting conductor and protective sheet has a different extension arc. The overall length is difficult to confirm with the eyes, but at least the design is that the length of the protective sheet extending outward is obviously shorter than the length of the shortest connecting conductor.

[0045] In one embodiment of the present application, the connection conductor 21 is one or more of a copper-silver composite tape, a copper tape, and a copper-nickel composite tape. When the connection conductor 21 is a copper-silver composite tape, in this case, the copper sheet flexible connection structure may not be subjected to a silver plating process, further improving the service life of the copper sheet flexible connection structure. And multiple layers are stacked, such as multiple layers of copper tape, copper-silver composite tape, or copper-nickel composite tape. The thickness of the protective sheet is 0.1 mm or 0.05 mm.

[0046] In one embodiment of the present application, Figure 3 As shown, it also includes a protection device 4, which is arranged on the outside of the connection between the hard connection part 1 and the soft connection part 2. The protection device 4 is in contact with the hard connection part 1 and the end of the soft connection part 2. Specifically, the protection device 4 is in contact with the protection sheet 3 on the corresponding side and extends outward at a smooth angle.

[0047] Furthermore, it can be clearly seen that the distance that the protection device 4 extends outward exceeds the distance that the corresponding side protection sheet 3 extends outward, that is, the length that extends outward at a certain angle is greater than the corresponding length of the protection sheet 3.

[0048] Furthermore, in one embodiment of the present application, the protection device 4 is made of copper or rubber.

[0049] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A copper sheet soft connection structure of a switchgear, characterized in that: The structure comprises: two opposite hard connection parts (1), a soft connection part (2) is arranged between the two hard connection parts (1), the soft connection part (2) comprises: a plurality of connection conductors (21), the ends of the plurality of connection conductors (21) are sequentially stacked and fixed on the hard connection part (1), the hard connection part (1) comprises a left end (11) and a right end (12) opposite to each other, the plurality of connection conductors (21) are sequentially arranged on the hard connection part (1) between the left end (11) and the right end (12), the connection conductors (21) closest to the left end (11) and / or the right end (12) are cut off, thereby forming a plurality of protective sheets (3).

2. The copper sheet flexible connection structure of the switchgear according to claim 1, characterized in that: The protection sheet (3) is obtained by cutting off one or two connecting conductors (21) closest to the left end (11) and / or the right end (12) of the hard connection part.

3. The copper sheet flexible connection structure of the switchgear according to claim 2, characterized in that: The length of the protective sheet (3) is less than half the length of the other connecting conductors (22) away from the left end (11) and the right end (12), that is, the length L of the protective sheet i Comply with L i ≤min{12d1,12d2,...,12d N }, wherein i∈[1,M], M is the total number of protection sheets, and N is the total number of other connecting conductors (22).

4. The copper sheet flexible connection structure of the switchgear according to claim 1, characterized in that: The connecting conductor (21) is one or more of a copper-silver composite strip, a copper strip and a copper-nickel composite strip.

5. The copper sheet flexible connection structure of the switchgear according to claim 1, characterized in that: The thickness of the protective sheet (3) is 0.1 mm or 0.05 mm.

6. The copper sheet flexible connection structure of the switchgear according to any one of claims 1 to 5, characterized in that: A protective device (4) is also provided on the outer side of the protective sheet (3); the protective device (4) is fitted with the protective sheet (3) on the corresponding side and extends outward at a smooth angle.

7. The copper sheet flexible connection structure of the switchgear according to claim 6, characterized in that: The distance that the protection device (4) extends outward exceeds the distance that the corresponding side protection sheet (3) extends outward.

8. The copper sheet flexible connection structure of the switchgear according to claim 6, characterized in that: The protective device (4) is made of copper or rubber.

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