Connection structure for a wiring bushing and switchgear

Abstract

The utility model provides a kind of for the connecting structure of wiring bushing and switch cabinet, connecting structure includes a metal component (1), the metal component (1) is used to connect in the first end of a wiring bushing (3), it is characterized in that, the connecting structure further includes an arc leading conductive component (2), the arc leading conductive component (2) includes a U-shaped piece (21), the U-shaped piece (21) includes a bottom plate (211) and the two side plates (212) of being located bottom plate (211) both sides and oppositely arranged, the bottom plate (211) part is used to adhere to the side of the metal component (1) away from the wiring bushing (3), two the side plate (212) extends towards the direction of the metal component (1), the melting point of the arc leading conductive component (2) is greater than the melting point of the metal component (1).

Description

Technical Field

[0001] This utility model relates to the field of switch cabinets, and in particular to a connection structure for wiring bushings and a switch cabinet. Background Technology

[0002] With rapid economic development, switchgear has been widely used in various settings such as residential communities, high-rise buildings, and large public buildings. Among them, gas-insulated switchgear typically uses insulating gas as the sealing medium within the gas box, which has excellent insulation performance and arc-extinguishing capability.

[0003] Although arcing accidents in switchgear are extremely rare, adequate preventative measures should still be taken. In practice, an arc-initiating conductive component is typically installed at one end of the wiring bushing, along with a grounded arc-extinguishing component. This way, even if an arc is generated, the arc-initiating conductive component will direct the arc to the grounded arc-extinguishing component, thus extinguishing the arc and effectively reducing damage caused by internal arcing. Utility Model Content

[0004] In view of this, the present invention proposes a connection structure for a wiring sleeve, the connection structure including a metal component for connecting to a first end of a wiring sleeve, characterized in that the connection structure further includes an arc-initiating conductive component, the arc-initiating conductive component including a U-shaped part, the U-shaped part including a base plate and two side plates located on both sides of the base plate and arranged opposite to each other, the base plate being used to abut against the side of the metal component away from the wiring sleeve, the two side plates extending toward the metal component, and the melting point of the arc-initiating conductive component being greater than the melting point of the metal component.

[0005] According to the connection structure for the bushing, by using an arc-initiating conductive component with a U-shaped part, and the melting point of its material being greater than that of the metal component, the ablation resistance of the main circuit can be enhanced, thus ensuring the integrity of the metal component and the bushing as much as possible.

[0006] Optionally, based on the connection structure described above, the device further includes a fixing member that sequentially passes through the first end of the arc-initiating conductive component, the metal assembly, and the wiring sleeve, so that the arc-initiating conductive component and the metal assembly are both fixed to the first end of the wiring sleeve. Using a fixing member to secure the arc-initiating conductive component, the metal assembly, and the wiring sleeve makes installation more convenient.

[0007] Optionally, according to the connection structure described above, the base plate covers the portion of the metal assembly that contacts the base plate. This reduces arc energy.

[0008] Optionally, according to the connection structure described above, each of the side plates has a first arc-shaped portion, and the side plate is transitionally connected to the base plate through the first arc-shaped portion. The connection between the side plate and the base plate through the first arc-shaped portion facilitates the uniformity of the electric field between phases.

[0009] Optionally, based on the connection structure described above, the arc-starting conductive component further includes a positioning element integrally formed with the U-shaped component, and the metal assembly can prevent displacement of the positioning element. The presence of this positioning element facilitates the positioning of the arc-starting conductive component.

[0010] Optionally, based on the connection structure described above, the positioning element has a hook-like body, and the metal assembly has a through hole, allowing the hook-like body to hook onto the metal assembly through the through hole. This positioning method is simple, convenient, and easy to install.

[0011] Optionally, according to the connection structure described above, one end of the positioning member has a second arcuate portion, and the positioning member is connected to the base plate of the U-shaped member through the second arcuate portion. The presence of this second arcuate portion can reduce tip discharge.

[0012] According to the connection structure described above, optionally, the connection structure includes at least one of the following structures:

[0013] All the angles of the arc-initiating conductive components are arc-shaped.

[0014] The metal component is made of copper, and the arc-starting conductive component is made of stainless steel.

[0015] The metal assembly includes two copper busbars, which are stacked at one end of the wiring sleeve.

[0016] According to the connection structure described above, optionally, the distance between the arc-initiating conductive component and another arc-initiating conductive component in an adjacent phase is equal to the minimum insulation distance. This minimizes the arc energy.

[0017] This utility model also provides a switch cabinet, which includes a connection structure for wiring sleeves and wiring sleeves as described in any of the preceding claims.

[0018] According to the switchgear described above, the switchgear is a gas-insulated switchgear; and / or

[0019] The end of the metal assembly away from the bushing is connected to a current transformer, and the end of the bushing away from the metal assembly is connected to a busbar. Attached Figure Description

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention. In the drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the connection structure for connecting sleeves according to the present invention, connected to the connecting sleeve.

[0022] Figure 2 This is a front view of the connection structure for the wiring sleeve according to the present invention connected to the wiring sleeve.

[0023] Figure 3 This is a schematic diagram of the arc-initiating conductive component according to the present invention.

[0024] The accompanying figure is labeled as follows:

[0025] 1-Metal Components

[0026] 11-Bronze busbar

[0027] 2-Arc-starting conductive components

[0028] 21-U-shaped parts

[0029] 211-Base Plate

[0030] 2111-Through Hole

[0031] 212-Side panel

[0032] 2121-First Arc Section

[0033] 22-Fasteners

[0034] 23-Positioning component

[0035] 231-Legion

[0036] 232-Second Arc Section

[0037] 3-Connecting sleeve Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the following embodiments are provided to further illustrate this utility model in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.

[0039] Junction bushings are typically connected to copper busbars, which in turn connect to other components, such as current transformers or voltage transformers. Switchgear generally has three phases, each with its own junction bushing and corresponding copper busbar. Due to structural requirements, switchgear sometimes necessitates wider phase spacing, resulting in larger insulation distances. In the event of an arcing fault, since the arc typically originates between adjacent copper busbars, the greater the phase-to-phase clearance, the greater the arc energy, making it more prone to copper busbar erosion, damage to switchgear components, and safety issues. Therefore, this invention provides an arc-initiating and conductive component for switchgear, designed to reduce arc energy and minimize copper busbar erosion.

[0040] like Figure 1 The diagram shown is a three-dimensional structural schematic of the connection structure for the wiring sleeve according to this utility model, connected to the wiring sleeve. Figure 2 The image shown is a front view of the connection structure for the wiring sleeve according to this utility model connected to the wiring sleeve. Figure 3 The diagram shown is a structural schematic of the arc-initiating conductive component according to this utility model.

[0041] The connection structure for the wiring sleeve includes a metal component 1, which is used to connect to the first end of a wiring sleeve 3. Specifically, a fixing member 22 passes through the metal component 1 and fixes the metal component 1 to the first end of the wiring sleeve 3. The first end of the wiring sleeve 3 may have a screw hole, and the fixing member 22 may be a bolt. The metal component 1 has a through hole, and the bolt passes through the through hole and is fixed in the screw hole, so that the metal component 1 is fixed to the wiring sleeve 3. Here, the metal component 1 may be a copper busbar 11. As an example, the metal component 1 includes two copper busbars 11, which are overlapped at one end of the wiring sleeve 3, such as... Figure 1 and Figure 2 As shown.

[0042] The connection structure for the wiring sleeve also includes an arc-initiating conductive component 2. This component 2 comprises a U-shaped part 21, which includes a base plate 211 and two side plates 212 located on either side of the base plate 211 and arranged opposite each other. The base plate 211 is used to abut against the side of the metal assembly 1 away from the wiring sleeve 3. The two side plates 212 extend towards the metal assembly 1. The melting point of the arc-initiating conductive component 2 is greater than that of the metal assembly 1. The base plate 211 and the two side plates 212 are integrally formed. The U-shaped part 21 is essentially arranged around the metal assembly 1. Thus, if an electric arc occurs, the arc energy will first damage the arc-initiating conductive component 2. Furthermore, since the melting point of the arc-initiating conductive component 2 is greater than that of the metal assembly 1, the burning time of the arc-initiating conductive component 2 will be longer than the portion of the metal assembly 1 it covers. For example, if the material of the metal assembly 1 is copper, then the melting point of the arc-initiating conductive component 2 only needs to be greater than that of the metal assembly 1. For example, the material of the arc-initiating conductive component 2 could be stainless steel or carbon steel. Furthermore, the side plate 212 of the U-shaped component 21 has increased material of the arc-initiating conductive component 2, enhancing its ablation resistance. Moreover, due to the presence of this arc-initiating conductive component 2, the interphase insulation distance is reduced, thereby lowering the arc energy.

[0043] The base plate 211 here is used to abut against the side of the metal assembly 1 away from the wiring sleeve 3, indicating that the base plate 211 is used to abut against the side of the metal assembly 1 away from its first end along the axial direction of the wiring sleeve 3.

[0044] As an example, such as Figure 1 As shown, the metal assembly 1 here includes two copper busbars 11, which are stacked at one end of the wiring sleeve 3. The two copper busbars 11 are respectively connected to the inlet and outlet terminals of the current transformer.

[0045] It should be noted that although the arc-initiating conductive component 2 is added, the insulation distance between phases can be guaranteed. For example, the spacing between two adjacent arc-initiating conductive components 2 can be the minimum insulation distance, thus minimizing arc energy. That is, the width of the base plate 211 of the arc-initiating conductive component 2 can be set according to actual conditions, as long as the insulation requirements are met. This results in a smaller insulation distance between the side plates 212 of two adjacent phases, which is more conducive to reducing arc energy.

[0046] According to the connection structure for the wiring sleeve, by adopting an arc-initiating conductive component 2 with a U-shaped part 21, and the melting point of its material being greater than that of the metal component 1, the ablation resistance of the main circuit can be enhanced, thus ensuring the integrity of the metal component 1 and the wiring sleeve 3 as much as possible.

[0047] As an example, the connection structure also includes a fixing member 22, which is sequentially inserted through the arc-initiating conductive component 2, the metal assembly 1, and the first end of the wiring sleeve, so that the arc-initiating conductive component 2 and the metal assembly 1 are both fixed to the first end of the wiring sleeve 3, such as... Figure 1 and Figure 2 As shown. The fastener 22 can be a bolt. Using the fastener 22 to fix the arc-initiating conductive component 2, the metal assembly 1, and the wiring sleeve 3 makes installation relatively convenient. More specifically, the base plate 211 of the U-shaped part 21 of the arc-initiating conductive component is provided with a through hole 2111, and the fastener 22 passes through the through hole 2111.

[0048] As an example, the base plate 211 covers the portion of the metal assembly 1 that contacts the base plate 211. For example... Figure 1 As shown, the width of the base plate 211 is greater than the width of the metal component 1, which reduces the arc energy while ensuring phase-to-phase insulation. The base plate 211 covers the part of the metal component 1 that contacts the base plate 211, indicating that if the arc should have burned to this part of the metal component 1, it now burns to the U-shaped part 21. Furthermore, since the melting point of the material of the U-shaped part 21 is higher than that of the metal component 1, its burning time is longer, which can ensure the integrity of the metal component 1 and the terminal sleeve 3 as much as possible.

[0049] As an example, each side plate 212 has a first arc-shaped portion 2121, and the side plate 212 is transitionally connected to the base plate 211 through the first arc-shaped portion 2121. The connection between the side plate 212 and the base plate 211 through the first arc-shaped portion 2121 is beneficial to the uniformity of the electric field between phases.

[0050] As an example, the arc-initiating conductive component 2 also includes a positioning member 23, which is integrally formed with the U-shaped component 21. The metal assembly 1 can prevent the positioning member 23 from shifting. The presence of the positioning member 23 facilitates the positioning of the arc-initiating conductive component 2. During the installation of the arc-initiating conductive component 2, for example, during the process of fixing the arc-initiating conductive component 2 and the metal assembly 1 to the first end of the wiring sleeve 3 with bolts, rotation may occur. The presence of the positioning member 23 ensures that the position of the arc-initiating conductive component 2 does not shift with the bolts. Figure 1 and Figure 2 As shown, the positioning element 23 is at a certain angle to the base plate 211, mainly to provide enough space for the positioning element 23 to be positioned on the metal component 1.

[0051] As an example, the positioning element 23 has a hook-like body 231, and the metal component 1 has a through hole, through which the hook-like body 231 can be hooked onto the metal component 1. This positioning method is simple, convenient, and easy to install.

[0052] As an example, one end of the positioning member 23 has a second arcuate portion 232, through which the positioning member 23 is connected to the base plate 211 of the U-shaped member 21. The presence of the second arcuate portion 232 can reduce tip discharge.

[0053] As another example, the corners of the arc-initiating conductive component 2 are all rounded. This reduces tip discharge. Figure 1 As shown, the corners of the side plates 212 of the U-shaped part 21 are all rounded corners, that is, chamfered corners.

[0054] As another example, the material of metal component 1 is copper, and the material of arc-igniting conductive component 2 is stainless steel. In switchgear, copper busbar 11 is generally used as metal component 1, and correspondingly, stainless steel is used for arc-igniting conductive component 2, which has a lower cost.

[0055] This utility model also provides a switch cabinet, which further includes the connection structure for the wiring sleeve and the wiring sleeve 3 as described above. The switch cabinet can be a gas-insulated switch cabinet. The wiring sleeve 3 can be installed between different compartments of the switch cabinet; for example, the wiring sleeve 3 can be installed between the cable compartment and the busbar compartment. The end of the metal component 1 away from the wiring sleeve 3 is connected to a current transformer, and the end of the wiring sleeve 3 away from the metal component 1 is connected to a busbar.

[0056] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A connection structure for a wiring sleeve, the connection structure comprising a metal component (1) for connection to a first end of a wiring sleeve (3), characterized in that, The connection structure further includes an arc-initiating conductive component (2), which includes a U-shaped component (21). The U-shaped component (21) includes a base plate (211) and two side plates (212) located on both sides of the base plate (211) and arranged opposite to each other. The base plate (211) is used to abut against the side of the metal assembly (1) away from the wiring sleeve (3). The two side plates (212) extend toward the metal assembly (1). The melting point of the arc-initiating conductive component (2) is greater than the melting point of the metal assembly (1).

2. The connection structure according to claim 1, characterized in that, Also includes: A fastener (22) is sequentially inserted through the first end of the arc-initiating conductive component (2), the metal assembly (1), and the wiring sleeve (3) so that the arc-initiating conductive component (2) and the metal assembly (1) are both fixed to the first end of the wiring sleeve (3).

3. The connection structure according to claim 1, characterized by The base plate (211) covers the portion of the metal component (1) that contacts the base plate (211).

4. The connection structure according to claim 3, characterized in that Each of the side plates (212) has a first arcuate portion (2121), and the side plate (212) is transitionally connected to the bottom plate (211) through the first arcuate portion (2121).

5. The connection structure according to claim 1, wherein The arc-initiating conductive component (2) also includes a positioning component, which is integrally formed with the U-shaped component (21), and the metal component (1) can prevent the positioning component from shifting.

6. The connection structure according to claim 5, characterized in that The positioning element has a hook (231), and the metal component (1) has a through hole, through which the hook (231) can be hooked onto the metal component (1).

7. The connection structure according to claim 5, wherein One end of the positioning member has a second arc-shaped portion (232), and the positioning member is connected to the base plate (211) of the U-shaped member (21) through the second arc-shaped portion (232).

8. The connection structure according to any one of claims 1 to 7, characterized in that, The connection structure includes at least one of the following structures: All angles of the arc-initiating conductive component (2) are arc-shaped. The metal component (1) is made of copper, and the arc-starting conductive component (2) is made of stainless steel. The metal assembly (1) includes two copper busbars (11), which are stacked at one end of the wiring sleeve (3).

9. The connection structure for a wiring sleeve according to any one of claims 1-7, characterized in that, The distance between the arc-starting conductive component (2) and another arc-starting conductive component in the adjacent phase is equal to the minimum insulation distance.

10. Switchgear cabinet, characterized in that Includes the connection structure for the wiring sleeve and the wiring sleeve (3) as described in any one of claims 1-9.

11. Switchgear according to claim 10, characterized in that The switchgear is a gas-insulated switchgear; and / or The end of the metal assembly (1) away from the bushing (3) is connected to a current transformer, and the end of the bushing (3) away from the metal assembly (1) is connected to a busbar.

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