Insulating gas tank device for air-filled switchgear

Abstract

The utility model discloses an insulation gas tank device suitable for inflation switch cabinet, including box, control switch and conducting component. Box is provided with insulation gas cavity, control switch is arranged in the box and is located insulation gas cavity, conducting component is arranged in the box, and conducting component is provided with at least two and interval arrangement, and conducting component includes wiring sleeve, conductor bar and arc striking conducting part, and wiring sleeve is worn in the box wall of box, and wiring sleeve includes conducting rod and the insulation cover of the sleeve of conducting rod outer periphery, and conductor bar and arc striking conducting part all are located in insulation gas cavity, and one end of conductor bar is arranged in one end of conducting rod and both are through, and the other end of conductor bar is arranged in control switch and both are through, and arc striking conducting part is arranged in wiring sleeve or conductor bar and is through with conductor bar, and the electrical gap between adjacent two arc striking conducting parts is less than the electrical gap between conducting component and the box wall of box.

Description

Technical Field

[0001] This utility model relates to gas-filled switchgear, and in particular to an insulating gas box device suitable for gas-filled switchgear. Background Technology

[0002] In power systems, gas-insulated switchgear is typically used to address safety issues related to control and protection, load disconnection, and ring network power supply. Existing gas-insulated switchgear includes an insulating gas chamber, which comprises a housing, a control switch, and two or more sets of conductive components. The housing contains an insulating gas cavity, within which the control switch is located. The conductive components include a bushing and a conductor rod. The bushing passes through the housing wall and includes a conductive rod and an insulating sleeve surrounding it. The conductor rod is located within the insulating gas cavity and is electrically connected to the control switch. In some insulating gas chambers, electric arcs can easily form between the conductor rod and the housing wall. The longer the arc, the higher its energy and the greater its destructive potential. In severe cases, the arc may puncture the housing wall and release energy, damaging the gas-insulated switchgear and posing a safety hazard to maintenance personnel. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an insulating gas box device suitable for gas-filled switchgear, which can reduce the impact of electric arcs on the box body and improve safety.

[0004] An insulating gas box device for gas-filled switchgear according to an embodiment of the present invention includes a box body, a control switch, and conductive components. The box body has an insulating gas cavity; the control switch is disposed in the box body and located within the insulating gas cavity; conductive components are disposed in the box body, with at least two conductive components arranged at intervals. Each conductive component includes a wiring sleeve, a conductor rod, and an arc-initiating conductive element. The wiring sleeve passes through the box wall of the box body and includes a conductor rod and an insulating sleeve fitted around the outer periphery of the conductor rod. The conductor rod and the arc-initiating conductive element are both located within the insulating gas cavity. One end of the conductor rod is disposed at one end of the conductor rod and the two are conductive; the other end of the conductor rod is disposed at the control switch and the two are conductive. The arc-initiating conductive element is disposed at the wiring sleeve or the conductor rod and is conductive to the conductor rod. The electrical clearance between two adjacent arc-initiating conductive elements is smaller than the electrical clearance between the conductive component and the box wall of the box body.

[0005] The insulating gas box device for gas-filled switchgear according to the embodiments of this utility model has at least the following beneficial effects: by adding an arc-initiating conductive element to the conductive component, the arc-initiating conductive element is connected to the conductor rod and the conductive rod, and the electrical gap between adjacent arc-initiating conductive elements is smaller than the electrical gap between the conductive component and the box wall. Since the electric arc will preferentially occur in the area with smaller electrical gap, the electric arc will be concentrated between adjacent arc-initiating conductive elements, thereby reducing the number of electric arcs between the conductive component and the box wall; the arc length between adjacent arc-initiating conductive elements is reduced, thereby reducing the arc energy and improving safety.

[0006] According to some embodiments of the present invention, the conductive component further includes a locking member, the arc-initiating conductive member is adjustablely mounted on the conductive rod, and the locking member is disposed between the arc-initiating conductive member and the conductive rod and can lock or unlock the position of the arc-initiating conductive member relative to the conductive rod.

[0007] According to some embodiments of the present invention, the arc-initiating conductive element is provided with a strip-shaped mounting hole, and the locking element is configured as a threaded fastener. The threaded fastener passes through the strip-shaped mounting hole and is threadedly connected to the conductive rod to lock the arc-initiating conductive element to the conductive rod. The threaded fastener can be adjusted in position relative to the arc-initiating conductive element along the length direction of the strip-shaped mounting hole.

[0008] According to some embodiments of this utility model, each of the conductive components is arranged at intervals along the left-right direction, and the length direction of the strip-shaped mounting hole is set along the left-right direction.

[0009] According to some embodiments of the present invention, the cross-section of the arc-initiating conductive component is elliptical and has a major axis and a center point, the length direction of the strip-shaped mounting hole is parallel to the major axis, and one end of the strip-shaped mounting hole is located at the center point.

[0010] According to some embodiments of this utility model, the arc-initiating conductive element has a groove on the side opposite to the conductive rod, the strip-shaped mounting hole is disposed on the bottom wall of the groove, and the conductor rod is located between the arc-initiating conductive element and the conductive rod.

[0011] According to some embodiments of the present invention, each of the conductive components is arranged at intervals along the left-right direction, and the cross-section of the arc-inducing conductive component is elliptical with a major axis direction, which is arranged along the left-right direction.

[0012] According to some embodiments of the present invention, the arc-initiating conductive element is cylindrical, and the outer periphery of the arc-initiating conductive element is smooth.

[0013] According to some embodiments of this utility model, three conductive components are provided and arranged at intervals along the left-right direction.

[0014] According to some embodiments of this utility model, the lower side wall of the box is provided with a pressure relief through hole, the pressure relief through hole extends to the insulating gas cavity, and the pressure relief through hole is vertically opposite to the arc-initiating conductive component.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the insulating gas box device of this utility model without the arc-initiating conductive component installed; Figure 2 A partial three-dimensional schematic diagram of the insulating gas box device of this utility model when installing the arc-initiating conductive component; Figure 3 A schematic diagram of the installation of the arc-initiating conductive component in the insulating gas box device according to an embodiment of this utility model; Figure 4 This is a schematic diagram of the assembly of the conductive component according to an embodiment of the present utility model; Figure 5 This is a three-dimensional schematic diagram of the arc-initiating conductive component according to an embodiment of the present invention.

[0017] Figure label: Box body 100, insulating gas cavity 110, pressure relief through hole 120; Control switch 200; Conductive component 300, wiring sleeve 310, conductive rod 311, insulating sleeve 312, conductor rod 320, arc-initiating conductive component 330, strip mounting hole 331, groove 332, threaded fastener 340. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 5 This invention relates to an insulating gas box device for gas-filled switchgear, comprising a box body 100, a control switch 200, and conductive components 300. The box body 100 has an insulating gas cavity 110; the control switch 200 is disposed in the box body 100 and located within the insulating gas cavity 110; at least two conductive components 300 are disposed in the box body 100 and spaced apart. Each conductive component 300 includes a wiring sleeve 310, a conductor rod 320, and an arc-initiating conductive element 330. The wiring sleeve 310 passes through the box wall of the box body 100 and includes a conductive rod 311 and an insulating sleeve 330 fitted around the outer periphery of the conductive rod 311. 12. The conductor rod 320 and the arc-initiating conductive element 330 are both located in the insulating gas cavity 110. One end of the conductor rod 320 is set at one end of the conductive rod 311 and the two are connected. The other end of the conductor rod 320 is set at the control switch 200 and the two are connected. The arc-initiating conductive element 330 is set in the wiring sleeve 310 or the conductor rod 320 and is connected to the conductor rod 320. The electrical gap between two adjacent arc-initiating conductive elements 330 is smaller than the electrical gap between the conductive component 300 and the box wall of the box 100.

[0023] By adding an arc-initiating conductive element 330 to the conductive component 300, the arc-initiating conductive element 330 is connected to the conductor rod 320 and the conductive rod 311. The electrical gap between adjacent arc-initiating conductive elements 330 is smaller than the electrical gap between the conductive component 300 and the box wall of the housing 100. Since the electric arc will preferentially occur in the area with the smaller electrical gap, the electric arc will be concentrated between adjacent arc-initiating conductive elements 330, thereby reducing the number of electric arcs between the conductive component 300 and the box wall of the housing 100. The arc length between adjacent arc-initiating conductive elements 330 is reduced, which reduces the arc energy and thus improves safety.

[0024] Specifically, in this embodiment, the electrical clearance between the conductor rod 320 and the wall of the housing 100 is smaller than the electrical clearance between two adjacent conductor rods 320. Since electric arcs tend to occur in areas with smaller electrical clearances, if the arc-initiating conductive element 330 is not provided, the arc will concentrate between the conductor rod 320 and the wall of the housing 100, potentially causing the arc to break through the wall of the housing 100 and release energy. By providing the arc-initiating conductive element 330, the electrical clearance between two adjacent arc-initiating conductive elements 330 is made smaller than the clearance between the conductor rod 320 and the wall of the housing 100, causing the arc to concentrate between two adjacent arc-initiating conductive elements 330. This reduces the number of arcs between the conductive component 300 and the wall of the housing 100, and also reduces the average length of the arc.

[0025] Reference Figure 1 and Figure 3 Without the arc-initiating conductive element 330, the electrical clearance between the conductor rod 320 and the box wall of the housing 100 is A, and the electrical clearance between two adjacent conductor rods 320 is B, satisfying A < B. After the arc-initiating conductive element 330 is installed, the electrical clearance between two adjacent arc-initiating conductive elements 330 is C, satisfying C < A.

[0026] Reference Figure 4 In this embodiment, the conductive component 300 further includes a locking member. The arc-initiating conductive component 330 is adjustablely mounted on the conductive rod 311. The locking member is disposed between the arc-initiating conductive component 330 and the conductive rod 311 and can lock or unlock the position of the arc-initiating conductive component 330 relative to the conductive rod 311. The arc-initiating conductive component 330 described above can have its installation position adjusted according to the actual application scenario to meet the electrical clearance requirements of actual use, making its use more flexible.

[0027] Reference Figure 4 and Figure 5In this embodiment, the arc-initiating conductive element 330 is provided with a strip-shaped mounting hole 331, and the locking element is configured as a threaded fastener 340. The threaded fastener 340 passes through the strip-shaped mounting hole 331 and is threadedly connected to the conductive rod 311 to lock the arc-initiating conductive element 330 to the conductive rod 311. The threaded fastener 340 can be adjusted in position relative to the arc-initiating conductive element 330 along the length direction of the strip-shaped mounting hole 331.

[0028] When the threaded fastener 340 is not tightened, the arc-initiating conductive element 330 can slide relative to the threaded fastener 340 through the strip-shaped mounting hole 331 to adjust its position, thereby adjusting the position of the arc-initiating conductive element 330 relative to the conductive rod 311. Once the position of the arc-initiating conductive element 330 is adjusted to a suitable level, tightening the threaded fastener 340 will fix the position of the arc-initiating conductive element 330 relative to the conductive rod 311. The structure for adjusting the position of the arc-initiating conductive element 330 is simple, and the installation and adjustment process is relatively convenient.

[0029] Specifically, the threaded fastener 340 is a screw, threadedly connected to the end of the conductive rod 311. It is conceivable that the threaded fastener 340 could also be, for example, a bolt and nut assembly.

[0030] It is understood that in other embodiments, the arc-initiating conductive element 330 may also be installed on the insulating sleeve 312 of the wiring sleeve 310, and the arc-initiating conductive element 330 abuts against the conductive rod 311 to achieve conduction with the conductor rod 320; or the arc-initiating conductive element 330 may be directly installed on the conductor rod 320 by screws or elastic clips.

[0031] It is conceivable that the locking element can also be other types, such as using an elastic clip to clamp and install the arc-initiating conductive element 330 onto the conductive rod 311; when the elastic clip is released, the position of the arc-initiating conductive element 330 relative to the conductive rod 311 can be moved and adjusted.

[0032] Reference Figure 1 and Figure 3 In this embodiment, the conductive components 300 are arranged at intervals along the left and right directions, and the length direction of the strip mounting holes 331 is set along the left and right directions, which facilitates the adjustment of the electrical gap between the arc-initiating conductive parts 330 of two adjacent conductive components 300 to a suitable degree, and the adjustment process is quick and efficient.

[0033] Reference Figure 5In this embodiment, the arc-initiating conductive element 330 has an elliptical cross-section with a major axis and a center point. The length direction of the strip-shaped mounting hole 331 is parallel to the major axis, and one end of the strip-shaped mounting hole 331 is located at the center point. Adjusting the electrical clearance between adjacent arc-initiating conductive elements 330 along the elliptical major axis is relatively simple and easy for maintenance personnel to operate. Furthermore, the relatively smooth outer periphery of the cross-section of the arc-initiating conductive element 330 is beneficial for the relatively uniform voltage and electric field around its periphery. Since the threaded fastener 340 passes through the strip-shaped mounting hole 331, the arc-initiating conductive element 330 can naturally rotate around the threaded fastener 340 when the threaded fastener 340 is not tightened. This means that the position of the arc-initiating conductive element 330 can be adjusted in various directions through the shorter strip-shaped mounting hole 331, meeting the installation position requirements in specific situations, without needing to arrange strip-shaped mounting holes 331 along the entire major axis.

[0034] Reference Figure 5 In the embodiment, the arc-initiating conductive element 330 is provided with a groove 332 on the side opposite to the conductive rod 311, and a strip-shaped mounting hole 331 is provided on the bottom wall of the groove 332. The conductor rod 320 is located between the arc-initiating conductive element 330 and the conductive rod 311, so that the threaded fastener 340 does not need to be made too long, and it is beneficial to the relatively uniform distribution of voltage and electric field on the surface of the arc-initiating conductive element 330.

[0035] Specifically, the cross-section of the groove 332 is also elliptical, which makes the groove wall of the groove 332 relatively smooth, which is conducive to a relatively uniform distribution of voltage and electric field.

[0036] Reference Figure 3 and Figure 5 In this embodiment, the conductive components 300 are arranged at intervals along the left-right direction, and the arc-initiating conductive element 330 has an elliptical cross-section with a major axis, which is set along the left-right direction. This arrangement fully utilizes the length of the arc-initiating conductive element 330 to adjust the electrical clearance, eliminating the need for a large width and saving material. Furthermore, it maintains a relatively smooth outer perimeter of the arc-initiating conductive element 330's cross-section, resulting in a more uniform voltage and electric field distribution, thus meeting the rated insulation requirements.

[0037] Reference Figure 5 In this embodiment, the arc-initiating conductive element 330 is cylindrical and has a smooth outer periphery, which makes the voltage and electric field distribution of the arc-initiating conductive element 330 more uniform and meets the rated insulation requirements.

[0038] Reference Figure 3In this embodiment, three conductive components 300 are provided and arranged at intervals along the left-right direction. The insulating gas box device of this application is suitable for three-phase gas-filled switchgear, and therefore has three conductive components 300. It is conceivable that in other embodiments, the number of conductive components 300 may be other, such as two, four, or more, and those skilled in the art can choose according to actual needs.

[0039] Reference Figure 2 In this embodiment, a pressure relief through-hole 120 is provided on the lower side wall of the housing 100, extending into the insulating gas cavity 110. The pressure relief through-hole 120 is vertically opposite to the arc-igniting conductive element 330. When an electric arc occurs between the arc-igniting conductive elements 330, the increased volume of insulating gas and the deflagration flame can be released through the pressure relief through-hole, which helps to reduce damage to the insulating gas box device and further improves safety.

[0040] Specifically, the arc-initiating conductive component 330 of this application can be applied to the wiring sleeve 310 of commonly available gas-insulated switchgear.

[0041] Specifically, the conductor rod 320 has a locking hole, and the threaded fastener 340 passes through the strip mounting hole 331 of the arc-initiating conductive element 330 and the locking hole of the conductor rod 320 and is threaded to the conductive rod 311, so that the threaded fastener 340 can be installed and fixed simultaneously with the conductor rod 320 and the arc-initiating conductive element 330, simplifying the equipment structure.

[0042] Specifically, conductor rod 320 is a copper rod, which has low resistance and good wire performance. It is understood that conductor rod 320 can also be made of other materials, and this is not limited here.

[0043] Specifically, the arc-initiating conductive component 330 is made of stainless steel, which has good durability and low surface roughness, which is conducive to the uniform distribution of voltage and electric field.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An insulating gas box device suitable for gas-insulated switchgear, characterized in that, include: The enclosure (100) is provided with an insulating gas cavity (110); A control switch (200) is disposed in the housing (100) and located in the insulating gas cavity (110); A conductive component (300) is disposed in the housing (100). At least two conductive components (300) are disposed and spaced apart. Each conductive component (300) includes a wiring sleeve (310), a conductor rod (320), and an arc-initiating conductive element (330). The wiring sleeve (310) passes through the wall of the housing (100). The wiring sleeve (310) includes a conductive rod (311) and an insulating sleeve (312) fitted around the outer periphery of the conductive rod (311). The conductor rod (320) and the arc-initiating conductive element (330) are both located within the housing. Inside the insulating gas cavity (110), one end of the conductor rod (320) is disposed at one end of the conductive rod (311) and the two are connected. The other end of the conductor rod (320) is disposed at the control switch (200) and the two are connected. The arc-initiating conductive element (330) is disposed at the wiring sleeve (310) or the conductor rod (320) and is connected to the conductor rod (320). The electrical clearance between two adjacent arc-initiating conductive elements (330) is smaller than the electrical clearance between the conductive component (300) and the box wall of the box body (100).

2. The insulating gas box device for gas-filled switchgear according to claim 1, characterized in that: The conductive component (300) further includes a locking member. The arc-inducing conductive component (330) is installed in an adjustable position on the conductive rod (311). The locking member is disposed between the arc-inducing conductive component (330) and the conductive rod (311) and can lock or unlock the position of the arc-inducing conductive component (330) relative to the conductive rod (311).

3. The insulating gas box device for gas-filled switchgear according to claim 2, characterized in that: The arc-initiating conductive element (330) is provided with a strip-shaped mounting hole (331), and the locking element is configured as a threaded fastener (340). The threaded fastener (340) passes through the strip-shaped mounting hole (331) and is threadedly connected to the conductive rod (311) to lock the arc-initiating conductive element (330) to the conductive rod (311). The threaded fastener (340) can be adjusted in position relative to the arc-initiating conductive element (330) along the length direction of the strip-shaped mounting hole (331).

4. The insulating gas box device for gas-filled switchgear according to claim 3, characterized in that: The conductive components (300) are arranged at intervals along the left and right directions, and the length direction of the strip mounting hole (331) is set along the left and right directions.

5. The insulating gas box device for gas-filled switchgear according to claim 3, characterized in that: The cross-section of the arc-initiating conductive component (330) is elliptical and has a major axis and a center point. The length direction of the strip-shaped mounting hole (331) is parallel to the major axis, and one end of the strip-shaped mounting hole (331) is located at the center point.

6. The insulating gas box device for gas-filled switchgear according to claim 3, characterized in that: The arc-initiating conductive element (330) has a groove (332) on the side opposite to the conductive rod (311), the strip-shaped mounting hole (331) is provided on the bottom wall of the groove (332), and the conductor rod (320) is located between the arc-initiating conductive element (330) and the conductive rod (311).

7. The insulating gas box device for gas-filled switchgear according to claim 1, characterized in that: Each of the conductive components (300) is arranged at intervals along the left-right direction. The cross-section of the arc-inducing conductive component (330) is elliptical and has a major axis direction, which is arranged along the left-right direction.

8. The insulating gas box device for gas-filled switchgear according to claim 1, characterized in that: The arc-initiating conductive element (330) is cylindrical, and the outer periphery of the arc-initiating conductive element (330) is smooth.

9. The insulating gas box device for gas-filled switchgear according to claim 1, characterized in that: The conductive components (300) are provided in three parts and arranged at intervals in the left-right direction.

10. The insulating gas box device for gas-filled switchgear according to claim 1, characterized in that: The lower side wall of the housing (100) is provided with a pressure relief through hole (120), which extends to the insulating gas cavity (110). The pressure relief through hole (120) is vertically opposite to the arc-initiating conductive component (330).

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