GIS arrangement structure

Abstract

The utility model discloses a GIS (gas insulated switchgear) arrangement structure, which relates to the field of switch equipment and comprises a shell, an integrated grounding switch unit, a transition gas chamber unit, a first double-fracture isolating switch unit, a second double-fracture isolating switch unit, a main bus connecting unit and a support component, and the integrated grounding switch unit, the transition gas chamber unit, the first double-fracture isolating switch unit, the second double-fracture isolating switch unit, the main bus connecting unit and the support component are arranged in the shell. The lower side of the integrated grounding switch unit is provided with the transition air chamber unit in an extending mode, the first double-fracture isolation switch unit and the second double-fracture isolation switch unit are connected to the two sides of the integrated grounding switch unit respectively, and the main bus connecting unit is arranged on the upper side of the first double-fracture isolation switch unit and the upper side of the second double-fracture isolation switch unit. And the supporting assembly is arranged below the integrated grounding switch unit and is connected with the lower sides of the first double-fracture isolation switch unit and the second double-fracture isolation switch unit respectively. According to the utility model, the problems of complex structure and high cost when a horizontal basin appears below a grounding switch fracture or an independent grounding switch unit is added to avoid the horizontal basin under the condition that a double-fracture isolation switch is contained in the existing GIS arrangement mode can be solved.

Description

Technical Field

[0001] The utility model relates to the field of switch equipment, in particular to a GIS layout structure. Background Art

[0002] GIS is the abbreviation of gas-insulated metal-enclosed switchgear, which is mainly a collection of devices for measuring, protecting and switching high-voltage transmission lines. It is used to realize circuit connection, disconnection and conversion operations, and is an important part of the power system. GIS has good insulation performance and high reliability, so it is widely used in high-voltage, extra-high-voltage and ultra-high-voltage power grids.

[0003] However, with the widespread application of GIS, affected by a series of factors such as equipment cost, project investment and power system planning, more and more GIS projects need to be built in phases. In some large-scale GIS projects, in order to facilitate expansion, intervals are often considered for future projects in the early design. The power outage problem during the expansion and maintenance of the later projects is also becoming increasingly prominent. The original power station design reserved intervals for single-break disconnectors, and no intermediate auxiliary grounding switches were required. As users of the Southern Grid and the State Grid have put forward higher requirements for the safety of the expansion and maintenance intervals, the use of double-break disconnectors has increased. At the same time, the layout of double-break disconnectors clearly requires the installation of auxiliary grounding switches for reliable grounding, resulting in large layout size of the expansion interval, many assembly parts and high cost. At present, the following two methods are mainly used for GIS layout: (1) The four-way assembly unit and the grounding switch building blocks are combined to build. However, the degree of component complexity in this method is low, and multiple components need to be combined during assembly. If the specifications or installation sequence of the components are incorrect, it may cause equipment performance degradation or safety problems. In addition, compared with a single device, multiple components need to be purchased and assembled, which is costly. (2) The grounding switch is installed on the upper side of the four-way assembly unit. This method has a horizontal basin below the grounding switch break. When metal foreign matter falls on the basin, it will cause discharge, reduce insulation reliability, and fail to meet the requirements for safe and stable operation of the power grid.

[0004] Under the market development and the requirements of relevant departments, horizontal basins are not allowed to appear under the movable fracture. Setting a horizontal basin under the movable fracture may affect the normal operation of the fracture, increase the difficulty of operation and wind direction, damage the fracture, affect the normal operation of the equipment, and may also affect the grounding effect of the equipment, increasing the safety hazards of equipment operation. Therefore, it is urgent to improve GIS to address the above problems and avoid the appearance of horizontal basins under the movable fracture. Utility Model Content

[0005] The utility model aims to provide a GIS arrangement structure to solve the problems of a horizontal basin appearing below a movable fracture in the existing GIS arrangement mode, which has a complex structure and high cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A GIS arrangement structure comprises: a housing, an integrated grounding switch unit arranged in the housing, a transition air chamber unit, a first double-break disconnector unit, a second double-break disconnector unit, a main busbar connection unit and a support assembly;

[0008] A transition air chamber unit is extended to the lower side of the integrated earthing switch unit, the first double-break isolating switch unit and the second double-break isolating switch unit are respectively connected to both sides of the integrated earthing switch unit, the main busbar connection unit is arranged on the upper side of the first double-break isolating switch unit and the second double-break isolating switch, and the support assembly is arranged below the integrated earthing switch unit and is respectively connected to the lower sides of the first double-break isolating switch unit and the second double-break isolating switch unit;

[0009] The integrated grounding switch unit includes a grounding switch and a four-way tank, wherein one end of the static side conductor of the grounding switch is fixedly connected to the first interface of the four-way tank, the other end of the static side conductor of the grounding switch is slidably connected to the first double-break isolating switch unit, the second interface of the four-way tank is connected to the second double-break isolating switch unit, and the third interface of the four-way tank is connected to the transition air chamber unit.

[0010] Furthermore, the first interface and the second interface are at the same horizontal position.

[0011] Furthermore, the four-way tank also includes a fourth interface, which is located on the upper side of the four-way tank and is configured to be a hand hole for installation.

[0012] Furthermore, the supporting insulating basin of the first double-break disconnector unit is slidably connected to the static side of the grounding switch.

[0013] Furthermore, the transition air chamber unit includes a transition shell and a transition conductor, and the transition conductor is arranged inside the transition shell.

[0014] Furthermore, a mounting opening is arranged on the surface of the shell body above the four-way tank, and a cover plate is arranged on the mounting opening.

[0015] Furthermore, the first double-break isolating switch unit and the second double-break isolating switch unit are symmetrically arranged and have the same structure.

[0016] Furthermore, the support assembly includes a support base plate and a support rod, and a first support rod and a second support rod are arranged on the surface of the support base plate.

[0017] Furthermore, the first support rod is connected to a first double-break isolating switch unit, and the second support rod is connected to a second double-break isolating switch unit.

[0018] Furthermore, an insulating basin is provided at the connection between the transition air chamber unit and the integrated grounding switch unit.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a GIS layout structure, wherein an integrated grounding switch unit is arranged in a shell, and the integrated grounding switch unit comprises a grounding switch and a four-way tank, wherein one end of a static side conductor of the grounding switch is fixedly connected to a first interface of the four-way tank, and the other end of the static side conductor is slidably connected to a first double-break isolating switch unit, a second interface of the four-way is connected to a second double-break isolating switch unit, and a third interface of the four-way is connected to a transition air chamber unit, and the transition air chamber unit is extended and arranged at the lower side of the integrated grounding switch unit. This integrated grounding switch structure can effectively reduce the reserved spacing size between the double-break isolating switches, and reduce the number of components such as insulating basins, contact seats, and spring contact fingers used when an independent grounding switch is connected to a transition four-way unit, shorten the spacing size between the components, realize integrated assembly, reduce leakage rate and cost, and at the same time, the structure is compact, simple and reliable, and can meet the requirements for safe and stable operation of the power grid; in the GIS layout structure provided by the utility model, the grounding switch and the four-way tank are integrated and arranged in the same shell, and share a transition air chamber unit, and no horizontal insulating basin is involved below the break of the grounding switch, which can improve the insulation reliability of the equipment and meet the requirements for safe and stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the GIS layout structure provided for this embodiment;

[0022] In the figure, 1. grounding switch unit; 2. transition air chamber unit; 3. first double-break disconnecting switch unit; 4. second double-break disconnecting switch unit; 5. main busbar connection unit; 6. support assembly. DETAILED DESCRIPTION

[0023] In the following, only some exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be illustrative rather than restrictive in nature.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] The utility model provides a GIS layout structure, including a shell, an integrated grounding switch unit 1, a transition air chamber unit 2, a first double-break disconnecting switch unit 3, a second double-break disconnecting switch unit 4, a main busbar connection unit 5 and a support assembly 6, wherein the integrated grounding switch unit is an integrated design of a four-way tank and a grounding switch, and the other end of the static side conductor of the grounding switch is directly connected to the horizontal conductor of the four-way tank, and the two are compositely integrated in the same shell and share the transition air chamber unit 2;

[0029] Specifically, the support assembly 6 includes a support base plate and a support rod, and a first support rod and a second support rod are arranged near both ends of the upper surface of the support base plate, wherein the first support rod is connected to the lower interface of the first double-break isolating switch unit 3, and the second support rod is connected to the upper interface of the second double-break isolating switch unit 4.

[0030] Specifically, the first double-break isolating switch unit 3 and the second double-break isolating switch unit 4 have the same structure and are symmetrically arranged on both sides of the integrated grounding switch unit 1, and are connected to the main bus unit 5 through their respective interfaces. In this embodiment, the distance between the centers of the main bus units 5 on both sides is 1781 mm.

[0031] Specifically, the transition air chamber unit 2 is extended downward from the lower side of the integrated grounding switch unit 1, wherein the transition air chamber unit 2 includes a transition shell and a transition conductor installed inside the transition shell. The transition air chamber unit 2 serves as an expansion port and is therefore separated from other adjacent assembly units by an insulating basin.

[0032] Specifically, the integrated grounding switch unit 1 includes a grounding switch and a four-way tank, wherein the shell at one end of the static side of the grounding switch is integrated with the outer shell of the four-way tank, the static side of the grounding switch and the internal conductor of the four-way tank are compositely integrated in the same shell, one end of the static side conductor of the grounding switch is directly fixedly connected to the first interface of the four-way tank to ensure the reliability of mechanical and electrical connection, and the other end of the static side conductor of the grounding switch is slidably connected to the supporting insulating basin of the first double-break isolating switch unit 3, which can absorb a certain axial size error; the second interface of the four-way tank is connected to the second double-break isolating switch unit 4, and the third interface of the four-way tank is connected to the transition air chamber unit 2;

[0033] It should be noted that the first interface and the second interface of the four-way tank are located in the horizontal direction when the four-way tank is assembled, and the third interface of the four-way tank is located in the vertical direction when the four-way tank is assembled.

[0034] In addition, the fourth interface of the four-way tank is located on the opposite side of the third interface and close to the top of the shell of the integrated grounding switch unit. The fourth interface is used to set the installation hand hole; the shell surface above the four-way tank is set with an installation port, and a cover plate is set on the installation port.

[0035] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only examples in all respects, not the only ones, and all changes within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. A GIS layout structure, characterized in that: include: A housing, an integrated grounding switch unit (1) arranged in the housing, a transition air chamber unit (2), a first double-break disconnecting switch unit (3), a second double-break disconnecting switch unit (4), a main busbar connection unit (5), and a support assembly (6); A transition air chamber unit (2) is extended from the lower side of the integrated earthing switch unit (1); a first double-break isolating switch unit (3) and a second double-break isolating switch unit (4) are respectively connected to both sides of the integrated earthing switch unit (1); a main busbar connection unit (5) is arranged on the upper side of the first double-break isolating switch unit (3) and the second double-break isolating switch; and the support assembly (6) is arranged below the integrated earthing switch unit (1) and is respectively connected to the lower side of the first double-break isolating switch unit (3) and the second double-break isolating switch unit (4); The integrated grounding switch unit (1) comprises a grounding switch and a four-way tank, wherein one end of a static side conductor of the grounding switch is fixedly connected to a first interface of the four-way tank, the other end of the static side conductor of the grounding switch is slidably connected to a first double-break isolating switch unit (3), the second interface of the four-way tank is connected to a second double-break isolating switch unit (4), and the third interface of the four-way tank is connected to a transition air chamber unit (2).

2. A GIS layout structure according to claim 1, characterized in that: The first interface and the second interface are at the same horizontal position.

3. A GIS layout structure according to claim 1, characterized in that: The four-way tank further comprises a fourth interface, which is located on the upper side of the four-way tank and is configured as a mounting hand hole.

4. A GIS layout structure according to claim 1, characterized in that: The supporting insulating basin of the first double-break disconnector unit (3) is slidably connected to the static side of the grounding switch.

5. A GIS layout structure according to claim 1, characterized in that: The transition air chamber unit (2) comprises a transition shell and a transition conductor, wherein the transition conductor is arranged inside the transition shell.

6. A GIS layout structure according to claim 1, characterized in that: A mounting opening is arranged on the surface of the shell body above the four-way tank, and a cover plate is arranged on the mounting opening.

7. A GIS layout structure according to claim 6, characterized in that: The first double-break isolating switch unit (3) and the second double-break isolating switch unit (4) are symmetrically arranged and have the same structure.

8. A GIS layout structure according to claim 1, characterized in that: The support assembly (6) comprises a support base plate and a support rod, and a first support rod and a second support rod are arranged on the surface of the support base plate.

9. A GIS layout structure according to claim 8, characterized in that: The first support rod is connected to a first double-break isolating switch unit (3), and the second support rod is connected to a second double-break isolating switch unit (4).

10. A GIS layout structure according to claim 1, characterized in that: An insulating basin is provided at the connection between the transition air chamber unit (2) and the integrated grounding switch unit (1).

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