Sealed grounding structure and gas insulated switchgear

Abstract

The utility model relates to a sealing grounding structure and a gas insulated switchgear, the sealing grounding structure comprises a flange, a grading ring, an insulating member, a conductive member, a fastener and a sealing member, and the flange is provided with a mounting hole; the grading ring is arranged on the inner side of the flange and is spaced from the flange; the insulating part is arranged between the flange and the grading ring, and a connecting channel which corresponds to and is communicated with the mounting hole is formed in the insulating part; the conductive piece is arranged in the connecting channel; the fastener is installed in the installation hole and abuts against the conductive piece. The sealing piece is arranged between the fastening piece and the flange; wherein the conductive piece is compressed under the acting force of the fastener, and one end, deviating from the fastener, of the conductive piece abuts against the grading ring. The sealing grounding structure provided by the utility model is simple in structure, convenient to install and good in sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of power technology, and in particular to a grounding screw sealing structure and a gas-insulated switchgear. Background Technology

[0002] With the development of power technology, gas-insulated switchgear (GIS equipment) has been widely used and plays an important role in the power system, ensuring the normal operation of substations. Its operational reliability is closely related to the safety of the entire power grid.

[0003] Insulating basins, as an important component of GIS equipment, serve a role in insulation support. For the equalizing ring within the insulating basin, a structure is needed that ensures reliable grounding of the equalizing ring while maintaining the equipment's gas-tight performance. Generally, a cover plate seal with a spring is used, but this structure is costly, requires four bolts for installation, and has poor assembly performance. Utility Model Content

[0004] Therefore, it is necessary to provide a grounding screw sealing structure to address the technical problems of poor assembly performance, high manufacturing cost, and complex structural design of the sealing grounding structure of the equalizing ring in the insulating basin in related technologies.

[0005] A sealed grounding structure, the sealed grounding structure comprising:

[0006] Flanges are constructed with mounting holes;

[0007] An equalizing ring is disposed on the inner side of the flange and spaced apart from the flange;

[0008] An insulating component is disposed between the flange and the equalizing ring, and the insulating component has a connection channel that corresponds to and communicates with the mounting hole;

[0009] A conductive element is disposed within the connection channel;

[0010] Fasteners are installed in the mounting holes and abut against the conductive components;

[0011] A sealing element is disposed between the fastener and the flange;

[0012] The conductive element is compressed under the force of the fastener, and the end of the conductive element away from the fastener abuts against the equalizing ring.

[0013] In one embodiment, the mounting hole includes a mating hole section and a stepped hole section, the fastener includes a bolt portion and a limiting portion connected to each other, the bolt portion mates with the mating hole section, the limiting portion is located within the stepped hole section, and the seal is pressed between the stepped surface of the stepped hole section and the limiting portion.

[0014] In one embodiment, a limiting annular groove is formed on the side of the limiting portion facing the stepped surface, the sealing member is disposed in the limiting annular groove, and the sealing member is partially exposed on the end face of the limiting portion.

[0015] In one embodiment, the end of the fastener is located within the mounting hole.

[0016] In one embodiment, the mounting hole is configured as follows:

[0017] A mating hole section for mating with the fastener;

[0018] A guide hole section is connected to the mating hole section, and one end of the conductive element is disposed in the guide hole section.

[0019] In one embodiment, the diameter of the mating hole section is larger than the diameter of the guide hole section, and a stepped surface is formed between the mating hole section and the guide hole section.

[0020] In one embodiment, the fastener is a screw, and the end of the screw facing the equalizing ring is provided with a guide surface, the guide surface and the stepped surface forming an angle, and the seal is pressed into the angle.

[0021] In one embodiment, the conductive element is a conductive spring.

[0022] In one embodiment, the conductive element is a conductive metal spring or a metal column.

[0023] A gas-insulated switchgear, the gas-insulated switchgear including the sealed grounding structure as described above.

[0024] Beneficial effects of the utility model:

[0025] This utility model discloses a sealed grounding structure for achieving grounding sealing of an equalizing ring. Specifically, the sealed grounding structure includes a flange, an equalizing ring, an insulating component, a conductive component, fasteners, and a sealing component. Mounting holes are provided on the flange to facilitate fastener connection. The equalizing ring is used to connect to the flange, and the insulating component isolates the equalizing ring and the flange, thereby preventing electrical connection between them. The conductive component enables conductivity between the equalizing ring and the fasteners, thus achieving grounding of the equalizing ring. The sealing component seals the internal space within the equalizing ring, achieving a gas sealing effect. The sealed grounding structure provided by this utility model is simple in structure, easy to install, and has good sealing performance. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the sealed grounding structure provided in Embodiment 1 of this utility model;

[0027] Figure 2 This is a cross-sectional view of the sealed grounding structure provided in Embodiment 2 of this utility model.

[0028] Figure label:

[0029] Fastener 1; Conductive component 2; Seal 3; Flange 4; Equalizing ring 5; Insulating component 6. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] Example 1

[0037] See Figure 1An embodiment of this utility model provides a sealed grounding structure, which includes a flange 4, an equalizing ring 5, an insulating component 6, a conductive component 2, a fastener 1, and a sealing component 3. The flange 4 has a mounting hole; the equalizing ring 5 is disposed inside the flange 4 and spaced apart from the flange 4; the insulating component 6 is disposed between the flange 4 and the equalizing ring 5, and the insulating component 6 has a connection channel corresponding to and communicating with the mounting hole; the conductive component 2 is disposed in the connection channel; the fastener 1 is installed in the mounting hole and abuts against the conductive component 2; the sealing component 3 is disposed between the fastener 1 and the flange 4; wherein, the conductive component 2 is compressed under the force of the fastener 1, and the end of the conductive component 2 away from the fastener 1 abuts against the equalizing ring 5.

[0038] This technical solution provides a sealed grounding structure for achieving grounding sealing of the equalizing ring 5. Specifically, the sealed grounding structure includes a flange 4, an equalizing ring 5, an insulating component 6, a conductive component 2, a fastener 1, and a sealing component 3. Mounting holes are provided on the flange 4 to facilitate the connection of the fastener. The equalizing ring 5 is used to connect to the flange 4, and the insulating component 6 isolates the equalizing ring 5 from the flange 4, thereby preventing electrical connection between the flange 4 and the equalizing ring 5. The conductive component 2 enables conductivity between the equalizing ring 5 and the fastener 1, thus achieving grounding of the equalizing ring 5. The sealing component 3 seals the internal space within the equalizing ring 5, thereby achieving a gas sealing effect. The sealed grounding structure provided by this utility model is simple in structure, easy to install, and has good sealing performance.

[0039] Specifically, flange 4 is located on the outermost side, insulating element 6 is sleeved on the outside of equalizing ring 5, conductive element 2 is conductive, and fastener 1 is also conductive, thereby achieving grounding of equalizing ring 5. Sealing element 3 is a sealing ring, which can be made of rubber or silicone. By placing sealing element 3 between fastener 1 and flange 4, the gap between fastener 1 and mounting hole is sealed, thereby preventing gas inside equalizing ring 5 from leaking through the mounting hole. Insulating element 6 is made of insulating resin.

[0040] In one embodiment, the mounting hole includes a mating hole section and a stepped hole section, the fastener 1 includes a bolt portion and a limiting portion connected to each other, the bolt portion mates with the mating hole section, the limiting portion is located in the stepped hole section, and the seal 3 is pressed between the stepped surface of the stepped hole section and the limiting portion.

[0041] The mating hole section is used to engage with the bolt portion of the fastener through a threaded connection, thereby enabling the fastener 1 to generate a preload force and reliably press the conductive element 2 against the equalizing ring 5. The stepped hole section is used to accommodate the limiting portion of the fastener 1, thereby limiting the fastener 1. Specifically, the mating hole section has an internal thread on its hole wall, and the stepped hole section is a smooth circular hole. The limiting portion can be a hexagonal structure or a cylindrical structure. As a preferred embodiment, the stepped hole section is set as a circular hole. The outer circumferential surface of the bolt portion has an external thread to achieve a threaded connection with the mating hole section. By pressing the sealing element 3, i.e., the sealing ring, between the stepped surface of the stepped hole section and the limiting portion, the gap between the stepped surface and the limiting portion is sealed by the elastic deformation of the sealing element 3. The sealing element 3 can be a flat sealing ring or a circular sealing ring. In this embodiment, the sealing element 3 is a flat annular sealing ring.

[0042] In one embodiment, a limiting annular groove is formed on the side of the limiting part facing the step surface, and the sealing member 3 is disposed in the limiting annular groove, with part of the sealing member 3 exposed on the end face of the limiting part.

[0043] By creating a limiting ring groove on the side of the limiting portion facing the stepped surface, and placing the sealing element 3 within the limiting ring groove, the sealing element 3 is limited by the limiting ring groove. The portion of the sealing element is exposed at the end face of the limiting portion, so that after the fastener 1 is engaged with the mounting hole, the limiting portion can press the sealing element 3 between the limiting portion and the stepped surface. This design ensures reliable sealing of the internal space of the equalizing ring 5. In this embodiment, the limiting ring groove is an annular groove with a square cross-sectional shape. The limiting ring groove not only secures the sealing ring but also prevents installation abnormalities such as ring pressing or falling during installation, effectively preventing external moisture and foreign matter from entering, and also preventing gas between the main and auxiliary sealing rings from escaping to the outside of the gas chamber, thus improving sealing performance.

[0044] In one embodiment, the end of fastener 1 is located inside the mounting hole. Positioning the end of fastener 1 within the mounting hole, i.e., making fastener 1 slightly shorter, facilitates installation. Of course, in other embodiments, the length of fastener 1 can be made longer, as long as it achieves grounding and sealing of the equalizing ring 5.

[0045] In one embodiment, the conductive element 2 is a conductive spring. By setting the conductive element 2 as a conductive spring, the presence of spring stress ensures a reliable electrical connection between the grounding fastener 1 (bolt) and the equalizing ring 5, ultimately resulting in a reliable connection and equipotential bonding between the equalizing ring 5 and the flange 4. The conductive element 2 can also be a conductive metal spring or a metal column.

[0046] The assembly method of the sealed grounding structure provided in this embodiment is as follows:

[0047] First, the conductive component 2, i.e., the conductive spring, is placed into the connection channel and mounting hole formed by the assembly of flange 4 and insulating component 6. The sealing ring is then assembled into the limiting groove of fastener 1, which is installed through the internal thread of the mounting hole on flange 4. The fastener is then tightened using a wrench. When the limiting part, i.e., the bolt head, is subjected to axial compressive force, the sealing ring is pressed into the annular groove of the bolt head, ensuring a tight fit between the sealing ring and fastener 1. Simultaneously, the sealing ring is compressed to ensure a tight fit between it and the contact surface of flange 4. Through this process, a seal is achieved between fastener 1 and flange 4.

[0048] As fastener 1 is tightened, the conductive spring is compressed. Due to the elastic deformation of the conductive spring, pressure is generated between the spring and fastener 1, and between the spring and the equalizing ring 5, ensuring a reliable electrical connection between fastener 1 and equalizing ring 5. This achieves a reliable connection and equipotential between equalizing ring 5, fastener 1, and flange 4, ultimately enabling equalizing ring 5 to be reliably grounded.

[0049] It should be noted that in this embodiment, fastener 1 can be replaced by other equivalent bolts or screws. Depending on the requirements, it can be other screw shapes. The top of the screw has a tightening structure of one of the following shapes: cross, hexagon, slotted, etc., for tightening the screw.

[0050] Example 2

[0051] The technical solution in this embodiment is basically the same as that in Embodiment 1, except that:

[0052] like Figure 2 As shown, the mounting hole is constructed as a mating hole section and a guide hole section. The mating hole section is used to mate with the fastener 1; the guide hole section is connected to the mating hole section, and one end of the conductive element 2 is located within the guide hole section. The diameter of the mating hole section is larger than the diameter of the guide hole section, and a stepped surface is formed between the mating hole section and the guide hole section. The fastener 1 is a screw, and a guide surface is provided at the end of the screw facing the equalizing ring 5. An angle is formed between the guide surface and the stepped surface, and the sealing element 3 is pressed into the angle.

[0053] In this embodiment, fastener 1 is a screw. A prominent guide surface, i.e., a chamfer, is provided at the end of the screw. A triangular area is formed between the chamfer and the wall of the mounting groove of flange 4 and the stepped surface. A sealing ring is placed within this triangular area to seal the equalizing ring 5. When the screw is tightened, the chamfered portion of the screw compresses the sealing ring within the triangular area. The sealing ring deforms under the pressure of the screw, and it fits tightly against the screw and the wall and stepped surface of the mounting hole of flange 4. This process achieves a seal between the grounding fastener 1 and flange 4.

[0054] Tightening the grounding screw compresses the grounding conductive spring. Due to the elastic deformation of the grounding conductive spring, pressure is generated between the spring and the screw, and between the spring and the equalizing ring 5, ensuring a reliable electrical connection between the grounding fastener 1 and the equalizing ring 5. This achieves a reliable connection and equipotential between the equalizing ring 5, fastener 1, and flange 4, ultimately enabling the equalizing ring 5 to be reliably grounded.

[0055] An embodiment of this utility model also provides a gas-insulated switchgear, which includes the sealed grounding structure described above. By using the sealed grounding structure described above in the gas-insulated switchgear, the sealed grounding structure includes a flange 4, an equalizing ring 5, an insulating component 6, a conductive component 2, a fastener 1, and a sealing component 3. Mounting holes are provided on the flange 4 to facilitate the connection of the fastener. The equalizing ring 5 is used to connect to the flange 4, and the insulating component 6 is used to isolate the equalizing ring 5 from the flange 4, thereby preventing electrical connection between the flange 4 and the equalizing ring 5. The conductive component 2 is used to achieve conductivity between the equalizing ring 5 and the fastener 1, thereby achieving grounding of the equalizing ring 5. The sealing component 3 is used to seal the internal space within the equalizing ring 5, thereby achieving a gas sealing effect. The sealed grounding structure provided by this utility model has a simple structure, is easy to install, and has good sealing performance.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A sealed grounding structure, characterized in that, The sealed grounding structure includes: Flanges are constructed with mounting holes; An equalizing ring is disposed on the inner side of the flange and spaced apart from the flange; An insulating component is disposed between the flange and the equalizing ring, and the insulating component has a connection channel that corresponds to and communicates with the mounting hole; A conductive element is disposed within the connection channel; Fasteners are installed in the mounting holes and abut against the conductive components; A sealing element is disposed between the fastener and the flange; The conductive element is compressed under the force of the fastener, and the end of the conductive element away from the fastener abuts against the equalizing ring.

2. The sealed grounding structure according to claim 1, characterized in that, The mounting hole includes a mating hole section and a stepped hole section. The fastener includes a bolt portion and a limiting portion that are connected to each other. The bolt portion mates with the mating hole section, and the limiting portion is located within the stepped hole section. The seal is pressed between the stepped surface of the stepped hole section and the limiting portion.

3. The sealed grounding structure according to claim 2, characterized in that, The limiting part has a limiting annular groove on one side facing the stepped surface, the sealing element is disposed in the limiting annular groove, and the sealing element is partially exposed on the end face of the limiting part.

4. The sealed grounding structure according to claim 1, characterized in that, The end of the fastener is located inside the mounting hole.

5. The sealed grounding structure according to claim 1, characterized in that, The mounting hole is configured as follows: The mating hole section is used to mate with the fastener; A guide hole section is connected to the mating hole section, and one end of the conductive element is disposed in the guide hole section.

6. The sealed grounding structure according to claim 5, characterized in that, The diameter of the mating hole section is larger than the diameter of the guide hole section, and a stepped surface is formed between the mating hole section and the guide hole section.

7. The sealed grounding structure according to claim 6, characterized in that, The fastener is a screw, and the end of the screw facing the equalizing ring is provided with a guide surface. The guide surface and the stepped surface form an angle, and the seal is pressed into the angle.

8. The sealed grounding structure according to any one of claims 1-7, characterized in that, The conductive component is a conductive spring.

9. The sealed grounding structure according to any one of claims 1-7, characterized in that, The conductive element is a conductive metal spring or a metal cylinder.

10. A gas-insulated switchgear, characterized in that, The gas-insulated switchgear includes a sealed grounding structure as described in any one of claims 1-9.

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