Flange plate for surge arrester

Abstract

The utility model relates to a kind of flange plate for surge arrester convenient to inflate, comprising: plate body, the plate body is the disc structure that symmetrically hollowed-out groove is set in middle part and the flat area of the arbitrary position of outer periphery edge;The plate body flat area is set on the outer diameter surface of plate body, and the center position of this flat area is opened with air passage from the outer diameter direction of plate body to plate body center direction, one end of the air passage is connected and is penetrated to corresponding symmetric hollowed-out groove, the other end of air passage is connected with the threaded connection hole that is opened inward from the surface of flat area and is penetrated, and joint is connected outside threaded connection hole;The flange plate realizes the combination of plate body and air extraction passage, forms integrated design, directly carries out vacuumizing and fills nitrogen gas;It reduces the demand of additional installation air extraction tooling, simplifies the flange plate design and installation process of surge arrester;Easy to operate, more convenient to carry out air extraction operation, and it is also convenient to check whether there is leakage condition.

Description

Technical Field

[0001] This utility model relates to a flange plate for surge arresters that is easy to inflate, and belongs to the field of surge arrester manufacturing technology. Background Technology

[0002] The flange plate for a 500kV gas-filled surge arrester is one of the key components of the arrester. Previously, the flange plate could only be sealed by using a vacuuming fixture to evacuate from above and fill it with nitrogen. This relied on the fact that nitrogen's density is lower than air's to achieve a seal. However, because the fixture wasn't perfectly fitted to the flange plate, leaks were possible. This required workers to repeatedly adjust the fixture and test for leaks. This method was slow, time-consuming, and physically demanding, making it increasingly difficult for this type of flange plate to meet the requirements of mass production and high efficiency. Utility Model Content

[0003] In view of the aforementioned technical problems, the purpose of this utility model is to provide a flange plate for surge arresters that is easy to pressurize. This flange plate integrates the plate body with the air extraction channel to form an integrated design, allowing for direct vacuuming and nitrogen filling. This reduces the need for additional air extraction fixtures, simplifies the flange plate design and installation process of surge arresters, and makes it easy to operate and perform air extraction operations, while also facilitating the inspection of any leaks.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a flange plate for a surge arrester that is easy to inflate, comprising: a plate body, wherein the plate body is a disc structure with a symmetrical hollowed-out groove in the middle and a planar area set at any position on the outer periphery; a plurality of outer layer through holes and a plurality of inner layer bolt countersunk holes are evenly opened along the circumference on the upper surface of the plate body between the outer periphery of the symmetrical hollowed-out groove and the outer periphery of the plate body; a first sealing groove is provided around the plate body between the positions of the plurality of inner layer bolt countersunk holes and the outer periphery of the symmetrical hollowed-out groove; the planar area of ​​the plate body is set on the outer diameter surface of the plate body, and a ventilation channel is opened from the outer diameter direction of the plate body towards the center of the plate body at the center position of the planar area; one end of the ventilation channel extends through to the corresponding symmetrical hollowed-out groove, and the other end of the ventilation channel is connected and extends through a threaded connection hole opened inward from the surface of the planar area, and a connector is connected to the outside through the threaded connection hole;

[0005] Furthermore, the symmetrical hollow slots are two oppositely arranged half-crescent "moon" structures, and the two hollow slots are separated by the middle beam of the plate.

[0006] Furthermore, a countersunk bolt hole is inserted into every three outer through holes arranged around the plate; the specifications of the countersunk bolt holes are the same as those of the inner bolt holes.

[0007] Furthermore, a sealing ring is embedded in the first sealing groove, and a second sealing groove is provided around the end face of the plate body in the opposite direction to the first sealing groove, and a sealing ring is embedded in the second sealing groove.

[0008] Furthermore, the height of the planar region, i.e. the thickness of the plate, is 22mm; the length of the planar region is 80mm.

[0009] Furthermore, the diameter of the ventilation channel is 4mm;

[0010] Furthermore, the connector is a PC threaded straight connector, model PC10-03;

[0011] Furthermore, a countersunk bolt hole is symmetrically provided on both sides of the ventilation channel at the center of the plate's planar area; the two countersunk bolt holes are used to cooperate with the flange plate using a sealing auxiliary unit to provide auxiliary sealing for the ventilation channel;

[0012] Furthermore, the sealing auxiliary unit includes: a spherical rubber ring, a sealing screw, a plug, an annular rubber ring, a pressure plate, and two fixing bolts; the sealing screw has a structure with a hexagonal mating hole inside, and the outer diameter of the sealing screw mates with the threaded connection hole of the flange plate, and the plug is installed in the hexagonal mating hole; during installation, the spherical rubber ring is placed at the junction of the threaded connection hole of the flange plate and the venting channel, and the sealing screw is screwed in from the threaded connection hole outside the spherical rubber ring, and then the plug is plugged into the hexagonal mating hole of the sealing screw; the installed plug extends a portion of the protruding area relative to the plate surface area; an annular rubber ring is provided around the outer periphery of the plate surface area located outside the protruding area, and a pressure plate is provided outside the annular rubber ring, and the pressure plate is fixedly connected to the two side bolt countersunk holes by two fixing bolts respectively.

[0013] The beneficial effects of this utility model are:

[0014] This solution adopts an integrated design that combines the flange plate body with the ventilation channel, reducing the need for additional evacuation equipment and simplifying the flange plate design and installation process of the surge arrester; the ventilation channel is directly on the flange plate, making the vacuuming of the entire surge arrester more efficient and convenient, and helping to quickly reach the required vacuum level.

[0015] By using sealing auxiliary components in conjunction with flange plates, excellent sealing performance is maintained even under high vacuum conditions, effectively reducing the risk of gas leakage and ensuring stable system operation.

[0016] The ventilation channel is directly on the flange, making it easier to perform evacuation operations and check for leaks; the design of this flange plate can improve production efficiency and reduce labor costs. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention.

[0018] Figure 2 for Figure 1 A sectional view along line AA.

[0019] Figure 3 for Figure 2 Enlarged view of section I (first sealing groove).

[0020] Figure 4 for Figure 2 Enlarged view of section II (second sealing groove).

[0021] Figure 5 for Figure 1 View B.

[0022] Figure 6 This is an assembly structure diagram of the flange plate and sealing auxiliary unit of this utility model.

[0023] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0024] Figure 8 for Figure 6 Partial structural diagram (hidden pressure plate).

[0025] In the diagram, 1. Plate body, 2. Symmetrical hollow groove, 1.1. Planar area, 3. Outer layer through hole, 4. Inner layer bolt countersunk hole, 5. First sealing groove, 6. Second sealing groove, 7. Ventilation channel, 8. Threaded connection hole, 1.2. Middle beam of plate body, 9. Bolt countersunk hole, 10. Side bolt countersunk hole, 9. Spherical rubber ring, 10. Sealing screw, 11. Block, 12. Annular rubber ring, 13. Pressure plate, 14. Fixing bolt. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] See also Figure 1-8The flange plate for a surge arrester, which is easy to inflate, includes: a plate body 1, wherein the plate body 1 is a disc structure with a symmetrical hollowed-out groove 2 in the middle and a planar region 1.1 set at any position on the outer periphery; a plurality of outer layer through holes 3 and a plurality of inner layer bolt countersunk holes 4 are evenly opened circumferentially on the upper surface of the plate body 1 between the outer periphery of the symmetrical hollowed-out groove 2 and the outer periphery of the plate body 1; a first sealing groove 5 is provided around the plate body 1 between the positions of the plurality of inner layer bolt countersunk holes 4 and the outer periphery of the symmetrical hollowed-out groove 2; the planar region 1.1 of the plate body is set on the outer diameter surface of the plate body 1, and a ventilation channel 7 is opened from the outer diameter direction of the plate body 1 towards the center of the plate body 1 at the center position of the planar region 1.1; one end of the ventilation channel extends through to the corresponding symmetrical hollowed-out groove 2, and the other end of the ventilation channel 7 is connected and extends through a threaded connection hole 8 opened inward from the surface of the planar region 1.1, and a connector is connected to the outside through the threaded connection hole 8.

[0028] The flange plate using the above scheme is assembled onto the 500KV porcelain bushing surge arrester, and vacuuming and nitrogen filling can be performed directly through the external PC threaded straight connector;

[0029] Furthermore, the symmetrical hollow slot 2 is a two oppositely arranged half-crescent "moon" structure, and the two hollow slots are separated by the middle beam 1.2 of the plate;

[0030] Furthermore, a bolt countersunk hole 9 is inserted into every three outer through holes 3 arranged around the plate 1; the specifications of the bolt countersunk hole 9 are the same as those of the inner bolt countersunk hole 4.

[0031] Furthermore, a sealing ring is embedded in the first sealing groove 5, and a second sealing groove 6 is provided around the end face of the plate 1 in the opposite direction to the first sealing groove 5, and a sealing ring is embedded in the second sealing groove 6.

[0032] In this embodiment, the outer layer through holes 3 of the plate are set in a quantity of 12, with a diameter of 12mm; furthermore, the number of bolt countersunk holes 9 inserted in the outer layer through holes 3 is 4;

[0033] In this embodiment, the inner bolt countersunk holes 4 of the plate are set in a quantity of 12 and a hole depth of 18mm;

[0034] In this design, the flange plate is installed in the surge arrester, which includes an "umbrella-shaped" outer sleeve with an internal cavity. An upper end seat and a lower end seat are respectively fitted onto the upper and lower ends of the outer sleeve. The surface of the upper end seat is flush with the upper end face of the outer sleeve, and the surface of the lower end seat is flush with the lower end face of the outer sleeve. A flange plate is installed at the upper and lower ends of the outer sleeve. The flange plate at the upper end of the outer sleeve is placed on the upper surface of the upper end seat and fixed by bolts passing through the outer through hole 3 of the plate. At the same time, the position of the second sealing groove 6 of the plate corresponds to the upper end face of the outer sleeve, and the sealing is maintained by the sealing ring in the second sealing groove 6.

[0035] A pressure plate is provided on the upper part of the flange plate at the upper end of the outer sleeve. The pressure plate is fixedly connected to the inner bolt countersunk hole 4 on the flange plate body 1 by several bolts to realize the connection between the pressure plate and the flange plate. At the same time, the sealing ring provided in the first sealing groove 5 of the flange plate body and the pressure plate achieve a seal.

[0036] The flange plate at the lower end of the outer sleeve is set in the same way as the flange plate at the upper end of the outer sleeve; through the above structural arrangement, the outer sleeve of the surge arrester, the flange plates at the upper and lower ends of the outer sleeve, and the pressure plate outside the flange plate together form the internal sealed space of the entire surge arrester.

[0037] Furthermore, the height of the planar region 1.1, i.e. the plate thickness, is 22mm; the length of the planar region 1.1 is 80mm.

[0038] Furthermore, the ventilation channel 7 has a diameter of 4 mm;

[0039] Furthermore, the machining specification of the threaded connection hole 8 opened inward from the surface of the planar region 1.1 is M8-6H;

[0040] Furthermore, the connector is a PC threaded straight connector, model PC10-03;

[0041] Furthermore, to enhance the sealing performance of the air extraction and inflation structure of this solution, a countersunk bolt hole 10 is symmetrically provided on both sides of the ventilation channel 7 at the center of the plate plane area 1.1. The countersunk bolt hole 10 has a diameter of 10mm. The two countersunk bolt holes 10 are used to cooperate with the flange plate using a sealing auxiliary unit to provide auxiliary sealing for the ventilation channel 7, ensuring that the surge arrester can maintain excellent sealing performance under high vacuum conditions, effectively reducing the risk of gas leakage and ensuring the stable operation of the system.

[0042] Furthermore, the sealing auxiliary unit includes: a spherical rubber ring 9, a sealing screw 10, a plug 11, an annular rubber ring 12, a pressure plate 13, and two fixing bolts 14; the sealing screw 10 has a structure with a hexagonal mating hole inside, and the outer diameter of the sealing screw 10 mates with the threaded connection hole 8 of the flange plate, and the plug 11 is installed in the hexagonal mating hole; during installation, the spherical rubber ring 9 is placed at the junction of the threaded connection hole 8 of the flange plate and the ventilation channel 7, and the sealing screw 10 is screwed in from the threaded connection hole 8 outside the spherical rubber ring 9, and then the plug 11 is plugged into the hexagonal mating hole of the sealing screw 10; after installation, the plug 11 extends a portion of the protruding area relative to the plate surface area 1.1; the annular rubber ring 12 is provided on the outer ring of the plate surface area 1.1 located outside the protruding area, and the pressure plate 13 is provided outside the annular rubber ring 12, and the pressure plate 13 is fixedly connected to the two side bolt countersunk holes 10 by two fixing bolts 14 respectively;

[0043] The above structure achieves the first seal of the spherical rubber ring 9 on the ventilation channel 7, and then the second seal of the ventilation channel 7 is achieved by the annular rubber ring 12 outside the flat area 1.1 of the flange plate, thereby increasing the sealing effect of the ventilation channel 7.

[0044] Furthermore, a circular groove is provided on the inner wall of the pressure plate 13, which corresponds to and matches the location of the block protrusion area and the annular rubber ring 12 outside the plate plane area 1.1. When the pressure plate 13 is installed, the circular groove fits perfectly with the block protrusion area and the annular rubber ring 12, thereby making the pressure plate 12 fit against the outer surface of the plate plane area 1.1 to achieve complete pressing of the pressure plate 13.

[0045] Based on the above scheme, when the surge arrester is evacuated, the PC threaded straight connector is connected to the threaded connection hole 8 outside the venting channel 7 to complete the evacuation operation; after evacuation, nitrogen is introduced, and after nitrogen introduction, the PC threaded straight connector is removed; then, the sealing auxiliary unit cooperates with the flange plate to ensure the system's sealing performance; after removing the PC threaded straight connector, the spherical rubber ring 9 is first placed at the junction of the threaded connection hole 8 of the flange plate and the venting channel 7, the spherical rubber ring 9 blocks the venting channel 7, and then the sealing screw 10 is removed from the spherical rubber ring. 9. The external threaded connection hole 8 is screwed in, and then the plug 11 is plugged into the hexagonal mating hole of the sealing screw 10. After installation, the plug 11 extends a part of the protruding area relative to the plate plane area 1.1. An annular rubber ring 12 is installed on the outer periphery of the plate plane area 1.1, and then the pressure plate 3 is pressed on the outer side of the annular rubber ring 13 and fastened to the two side bolt countersunk holes 10 by two fixing bolts 14, thereby realizing the cooperation between the sealing auxiliary unit and the flange plate and ensuring the sealing effect of the system.

[0046] It should be noted that the flange plate in this solution is equivalent to the upper sealing cover plate structure in a surge arrester, which is common knowledge. It can be considered as an optimization and improvement of the upper sealing cover plate structure of a surge arrester.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

Claims

1. A flange plate for surge arresters that is easy to inflate, characterized in that, The device includes: a plate, wherein the plate is a disc structure with a symmetrical hollowed-out groove in the center and a planar area at any position on the outer periphery; the upper surface of the plate between the outer periphery of the symmetrical hollowed-out groove and the outer circumferential edge of the plate has a plurality of outer layer through holes and a plurality of inner layer bolt countersunk holes evenly formed along the circumference; a first sealing groove is formed around the plate between the positions of the inner layer bolt countersunk holes and the outer periphery of the symmetrical hollowed-out groove; the planar area of ​​the plate is set on the outer diameter surface of the plate, and a ventilation channel is formed at the center of the planar area from the outer diameter direction to the center of the plate; one end of the ventilation channel extends through to the corresponding symmetrical hollowed-out groove, and the other end of the ventilation channel is connected and extends through a threaded connection hole formed from the surface of the planar area inward; a connector is connected to the outside of the threaded connection hole.

2. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: The symmetrical hollowed-out grooves are two oppositely arranged half-crescent "moon" structures, separated by a central beam of the plate.

3. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: A bolt countersunk hole is inserted into a plurality of outer through holes arranged in a ring on the plate, with a spacing of three outer through holes; the specifications of the bolt countersunk hole are the same as those of the inner bolt countersunk hole.

4. The flange plate for a surge arrester that is easy to inflate according to claim 1, characterized in that: A sealing ring is embedded in the first sealing groove, and a second sealing groove is provided around the end face of the plate in the opposite direction to the first sealing groove, with a sealing ring embedded in the second sealing groove.

5. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: The height of the planar region, i.e. the thickness of the plate, is 22mm; the length of the planar region is 80mm.

6. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: The ventilation channel has a diameter of 4 mm.

7. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: The connector is a PC threaded straight connector, model PC10-03.

8. The flange plate for surge arresters that is easy to inflate according to claim 1, characterized in that: A countersunk bolt hole is symmetrically provided on both sides of the ventilation channel at the center of the plate's planar area; the two countersunk bolt holes are used to mate with the flange plate through the sealing auxiliary unit.

9. The flange plate for a surge arrester that is easy to inflate according to claim 8, characterized in that: The sealing auxiliary unit includes: a spherical rubber ring, a sealing screw, a plug, an annular rubber ring, a pressure plate, and two fixing bolts. The sealing screw has a structure with a hexagonal mating hole inside, and the outer diameter of the sealing screw mates with the threaded connection hole of the flange plate. The plug is installed in the hexagonal mating hole. During installation, the spherical rubber ring is placed at the junction of the threaded connection hole and the venting channel of the flange plate, and the sealing screw is screwed in from the threaded connection hole outside the spherical rubber ring. Then, the plug is inserted into the hexagonal mating hole of the sealing screw. The installed plug has a protruding area extending from the flat area of ​​the plate. An annular rubber ring is provided around the outer periphery of the flat area of ​​the plate, and a pressure plate is provided outside the annular rubber ring. The pressure plate is fixedly connected to the countersunk holes of the two side bolts by two fixing bolts.

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