CN220082112U

CN220082112U - Pressurized plugging device

Info

Publication number: CN220082112U
Application number: CN202321650594.1U
Authority: CN
Inventors: 曹淦; 金少军; 张强; 张文; 任占义; 杨云肖; 梁才睿; 卞青; 王玉姣; 李卫兵; 韦杰丰
Original assignee: Yangjiang Nuclear Power Co Ltd
Current assignee: Yangjiang Nuclear Power Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-11-24
Anticipated expiration: 2033-06-27

Abstract

The utility model discloses a pressurized plugging device, which is used for sealing an air chamber movable shaft of a ground knife air chamber operating mechanism of GIS equipment, wherein the ground knife air chamber operating mechanism comprises a mounting flange and a movable shaft extending out of the mounting flange; the pressurized plugging device comprises: the sealing component is in sealing sleeve joint with the periphery of the movable shaft and is in sealing butt joint with the flange surface of the mounting flange to form a closed space; and the pressurizing and fixing assembly is used for pressing one end, far away from the movable shaft, of the sealing assembly and is fixedly connected with the mounting flange so as to apply pressure to the sealing assembly and further ensure the tightness of the sealing assembly. The pressure plugging device provided by the utility model has the advantages of simple structure, convenience in disassembly and assembly and strong bearing capacity, can be used for plugging gas leakage faults of GIS equipment under pressure, and can be used for preventing serious consequences such as equipment fault outage and the like caused by sulfur hexafluoride gas leakage during the operation of the GIS equipment.

Description

Pressurized plugging device

Technical Field

The utility model relates to the technical field of leakage maintenance of GIS equipment special for nuclear power plants, in particular to a pressurized plugging device.

Background

In power production enterprises such as large-scale power plants, large-scale chemical plants and oil refineries, GIS equipment is indispensable, and GIS is a closed type electric high-voltage complete switch, which consists of a breaker, a knife, a ground knife, and other equipment and is used for the operations such as switching on and off of a high-voltage power transmission and distribution system. The combined sealing device has the functions of sealing elements such as a circuit breaker, a disconnecting switch, a grounding switch, a current transformer, a voltage transformer, a lightning arrester, a bus, a wire inlet and outlet sleeve or a cable terminal and the like in a grounding metal shell, and charging SF with certain pressure ₆ The complete switch equipment is composed of (sulfur hexafluoride) gas as insulating medium and arc extinguishing medium.

SF charged with certain pressure in GIS equipment ₆ The gas is used as an insulating medium and an arc extinguishing medium, the pressure of the gas is conventionally designed to be 0.6MPa, the alarm pressure is 0.55MPa and the locking pressure is 0.5MPa. The micro water content is controlled below 150ppm (ring temperature is 20 ℃), the minimum micro water content is basically not more than 300ppm when in operation, if the pressure reaches the alarm/locking value on site, the air should be timely supplemented for leakage detection, the reason for pressure reduction is searched, and the equipment air chamber is prevented from SF ₆ Excessive gas leakage reduces the insulation of the gas chamber and causes discharge failure.

At present, the most effective method for finding the leakage point is cold welding, so that the leakage point is blocked, but the method can damage the original structure of equipment, and the subsequent additional replacement is increased. And the special leakage point position cannot be effectively plugged by the conventional plugging method, such as cold welding, glue spraying and the like.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a pressurized plugging device.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a pressurized plugging device, is used for the air chamber loose axle seal of the ground sword air chamber operating mechanism of GIS equipment, the air chamber operating mechanism of said ground sword includes mounting flange, and stretches out the loose axle of said mounting flange; the pressurized plugging device comprises:

the sealing component is in sealing sleeve joint with the periphery of the movable shaft and is in sealing abutting joint with the flange surface of the ground mounting flange to form a closed space; and

and the pressurizing fixing assembly is used for pressing one end, far away from the movable shaft, of the sealing assembly and is fixedly connected with the mounting flange so as to apply pressure to the sealing assembly and further ensure the tightness of the sealing assembly.

Preferably, in the pressurized plugging device of the present utility model, the sealing assembly includes:

the inner structure of the cylinder type cover body is matched with the movable shaft and sleeved on the periphery of the movable shaft;

the sealing piece is arranged on the first end part of the cylinder type cover body, which is close to the mounting flange, and is in sealing abutting connection with the flange surface of the mounting flange;

and the sealing cover is connected to the second end part of the cylinder type cover body, which is far away from the mounting flange in a sealing way.

Preferably, in the pressurized plugging device of the present utility model, the cylinder cover body includes a cylinder body and a fixing protrusion, and the fixing protrusion is disposed inside the cylinder body; the fixed protrusion is matched with the groove of the movable shaft to prevent the movable shaft from rotating relative to the cylinder cover body.

Preferably, in the pressurized plugging device according to the present utility model, the cartridge type cover further includes a mounting groove for mounting the sealing member, and the mounting groove is provided on the first end portion of the cartridge type body.

Preferably, in the pressurized plugging device according to the present utility model, the sealing cover is provided with a welding groove and is welded and fixed to the second end portion of the cylinder cover.

Preferably, in the pressurized plugging device of the present utility model, the pressurized fixing assembly includes:

a pressing plate pressed on one end of the sealing assembly away from the movable shaft;

and one end of the fixing piece is connected with the pressing plate, and the other end of the fixing piece is connected with the flange hole of the mounting flange.

Preferably, in the pressurized plugging device of the present utility model, the pressing plate includes a plurality of through holes connected to the fixing member, and the through holes are set to avoid the sealing assembly.

Preferably, in the pressurized plugging device of the present utility model, the through hole is a long waist hole.

Preferably, in the pressurized plugging device of the present utility model, the fixing member is a bolt and a nut.

Preferably, in the pressurized plugging device of the present utility model, the sealing member is a sealing ring.

By implementing the utility model, the following beneficial effects are achieved:

the pressurized plugging device adopts a covering structure, and the pressurizing fixing component and the mounting flange of the ground knife air chamber operating mechanism where the position to be plugged is positioned are utilized to fasten so as to realize the compaction of the sealing component and the flange surface of the mounting flange, thereby realizing the plugging effect. The pressurized plugging device has good plugging effect and is easy to disassemble and assemble.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of the whole structure of a pressurized plugging device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the seal assembly of FIG. 1 of the present utility model;

FIG. 3 is a partial cutaway top view of the seal assembly of FIG. 1 of the present utility model;

FIG. 4 is a schematic view of the seal cap of FIG. 2 according to the present utility model;

FIG. 5 is one of the installation schematic diagrams of the pressurized plugging device of FIG. 1 according to the present utility model;

FIG. 6 is a second schematic view of the installation of the pressurized plugging device of FIG. 1 according to the present utility model.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or chemically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The GIS equipment of the utility model refers to high-voltage complete-set closed combined switch equipment special for a nuclear power station, wherein the GIS equipment is formed by closing a breaker, a disconnecting switch, a grounding switch, a current transformer, a voltage transformer, a lightning arrester, a bus, a wire inlet and outlet sleeve, a cable terminal and other elements in a grounding metal shell in a combined manner, and charging SF with a certain pressure ₆ The gas serves as an insulating medium and an arc extinguishing medium. The GIS equipment comprises a ground knife air chamber operating mechanism, wherein the ground knife air chamber operating mechanism is provided with a movable shaft which is in a plum blossom shape, and the plum blossom-shaped movable shaft 4 is taken as an embodiment object in the utility model. It can be appreciated that the utility model can be used for sealing the movable shaft of the air chamber of the ground knife operating mechanism of GIS equipment, and can also be used for sealing other similar structures. Before the pressurized plugging device is installed, the electric guide rod of the air chamber operating mechanism of the ground knife is required to be removed to allow the plugging device to be installed.

Referring to fig. 1 to 6, an embodiment of the present utility model discloses a pressurized plugging device, which is used for sealing a movable shaft of a gas chamber of a ground knife gas chamber operating mechanism of a GIS device, wherein the ground knife gas chamber operating mechanism comprises a mounting flange 3 and a movable shaft 4 extending out of the mounting flange 3. In addition, the device can also be used for on-line leakage stoppage of special leakage point positions of other similar structures, and original structures are not damaged while the leakage point positions are purposefully stopped. Not only is economic loss caused by unexpected shutdown of GIS equipment avoided, but also the safety of the GIS equipment in the operation period is improved.

The pressurized plugging device comprises a sealing component 1 and a pressurizing and fixing component 2, and is sealedSeal assembly 1 constitutes sealed space together with the ground sword air chamber operating device of GIS equipment, can prevent GIS equipment gas leakage, and pressurization fixed subassembly 2 can provide the compressive force for seal assembly 1 can bear SF in the GIS equipment ₆ A certain pressure of the gas.

Referring to fig. 5 and 6, the seal assembly 1 in some embodiments is sealingly sleeved on the moveable shaft 4 of the ground blade air chamber operating mechanism of the GIS device and sealingly abuts the flange face 31 of the mounting flange 3 of the ground blade air chamber operating mechanism. The movable shaft 4 of the air chamber operating mechanism of the ground knife extends out from the middle part of the flange surface 31, the sealing component 1 is abutted against the flange surface 31 and completely covers the movable shaft 4 to form a closed space, and SF is prevented from being generated ₆ And (5) gas leakage.

As shown in fig. 6, the pressurizing and fixing assembly 2 presses one end of the sealing assembly 1 away from the movable shaft 4, and is fixedly connected with the mounting flange 3 of the ground knife air chamber operating mechanism to apply pressure to the sealing assembly 1 towards the direction of the ground knife air chamber operating mechanism, so that the tightness of the sealing assembly 1 is ensured.

As shown in fig. 2, the seal assembly 1 in some embodiments comprises: the cartridge cover 11, the seal 12 and the seal cover 13 are preferably made of metal materials. The inner structure of the cylinder cover 11 is matched with the movable shaft 4 and sleeved on the periphery of the movable shaft 4 of the air chamber operating mechanism of the ground knife. The seal 12 is provided at a first end of the cartridge cover 11 near the mounting flange 3, and is in sealing contact with the flange surface 31 of the mounting flange 3. A sealing cap 13 is sealingly connected to a second end of the cartridge housing 11 remote from the mounting flange 3. It will be appreciated that in some embodiments, the cartridge housing 11 and the seal cap 13 may be of unitary construction, such as a cylindrical construction, and the seal 12 may be provided at the open end.

Further, referring to fig. 2 and 3, the cartridge type housing 11 includes a cartridge type body 111 and a fixing protrusion 112 in some embodiments, the cartridge type body 111 has a cylindrical hollow structure having a certain thickness, and both ends are ring-shaped. The fixing protrusion 112 is provided inside the cylinder body 111, and the fixing protrusion 112 is matched with the groove of the movable shaft 4 to prevent the movable shaft 4 from rotating relative to the cylinder housing 11. It will be appreciated that the fixing protrusion 112 of the present utility model is only used for positioning and limiting the rotation of the movable shaft 4, and the fixing protrusion 112 may be matched with the groove of the movable shaft 4, and the fixing protrusion 112 may be matched with the width of the groove, or may be not limited in length, or may be similar to the length of the movable shaft 4. Preferably, the number of the fixing protrusions 112 is two, and the fixing protrusions 112 are symmetrically arranged at the middle position of the inner side wall of the cylinder body 111, or the number of the fixing protrusions 112 can be 3, 4 or the number matched with the number of the grooves, and the number of the fixing protrusions 112 is not limited in the utility model.

It is expected that the problem of the position deviation of the ground knife caused by the dismounting of the electric guide rod can be avoided when the pressurized plugging device is installed, and the position of the ground knife can not be deviated effectively after the pressurized plugging device is installed according to the embedded tooth-shaped groove of the movable shaft 4 of the ground knife air chamber operating mechanism.

As shown in fig. 2, the cartridge housing 11 in some embodiments further includes a mounting groove 113 for mounting the seal 12, the mounting groove 113 being provided on the first end of the cartridge body 111. Preferably, as shown in fig. 3, the sealing member 12 is a sealing ring, the mounting groove 113 is annular, and the mounting groove 113 is provided at a middle position of the first end of the cylinder body 111 for mounting the sealing ring. The material of the sealing member 12 may be rubber, plastic, polytetrafluoroethylene, polyethylene, silicone, etc., and a suitable material is selected according to the need.

As shown in fig. 4, the sealing cap 13 is provided with a welding groove in some embodiments and is welded to the second end of the cartridge housing 11. Preferably, the cartridge housing 11 includes in some embodiments a cartridge body 111, the second end of the cartridge body 111 being provided with an annular recess to receive the sealing cap 13, the sealing cap 13 being mountable on the recess and welded for sealing and securing.

Referring to fig. 1, 5 or 6, the press-fixing assembly 2 includes a pressing plate 21 and a fixing member 22 in some embodiments, and preferably, the pressing plate 21 and the fixing member 22 are of a metal material. The pressure plate 21 presses on the end of the sealing assembly 1 remote from the movable shaft 4. Preferably, the pressing plate 21 is abutted against the sealing cover 13, the contact surface of the sealing cover 13 and the pressing plate 21 is a horizontal surface, and the contact surface of the pressing plate 21 and the sealing cover 13 is also a horizontal surface, so that the pressing plate 21 can apply pressure and maintain the contact stability of the pressing plate 21 and the sealing cover. One end of the fixing piece 22 is connected with the pressing plate 21, and the other end is connected with the flange hole 32 of the mounting flange 3.

Further, as shown in fig. 1 and 5, the pressure plate 21 in some embodiments includes a plurality of through holes 211 connected to the fixing member 22, and the through holes 211 are disposed away from the sealing assembly 1. Preferably, the through hole 211 is a long waist hole, and the position adjustment can be performed. The number of through holes 211 is 4, and they are arranged at equal intervals along the periphery of the platen 21. Similarly, the number of the fixing members 22 is 4, and the fixing members 22 are bolts and nuts.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above embodiments or technical features may be freely combined, and several variations and modifications may be made, without departing from the spirit of the utility model, which fall within the scope of the utility model, i.e. the embodiments described in "some embodiments" may be freely combined with any of the above and below embodiments; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a pressurized plugging device, is used for the air chamber loose axle seal of the air chamber operating mechanism of the ground sword of GIS equipment, the said air chamber operating mechanism of the ground sword includes mounting flange (3), and stretches out the loose axle (4) of the said mounting flange (3); the device is characterized in that the device comprises:

the sealing assembly (1) is in sealing sleeve joint with the periphery of the movable shaft (4) and is in sealing abutting joint with the flange surface (31) of the mounting flange (3) to form a closed space; and

and the pressurizing fixing assembly (2) is used for pressing one end, far away from the movable shaft (4), of the sealing assembly (1) and is fixedly connected with the mounting flange (3) so as to apply pressure to the sealing assembly (1) and further ensure the tightness of the sealing assembly (1).

2. Pressurized plugging device according to claim 1, wherein said sealing assembly (1) comprises:

the cylinder type cover body (11) is matched with the movable shaft (4) in internal structure and sleeved on the periphery of the movable shaft (4);

a seal (12) provided on a first end portion of the cylinder cover (11) close to the mounting flange (3) and in sealing contact with a flange surface (31) of the mounting flange (3);

and the sealing cover (13) is connected to the second end part of the cylinder type cover body (11) far away from the mounting flange (3) in a sealing way.

3. The pressurized plugging device according to claim 2, wherein the cartridge type cover body (11) includes a cartridge type body (111) and a fixing protrusion (112), the fixing protrusion (112) being provided inside the cartridge type body (111); the fixing protrusion (112) is matched with the groove of the movable shaft (4) to prevent the movable shaft (4) from rotating relative to the cylinder cover body (11).

4. A pressurized plugging device according to claim 3, wherein the cartridge housing (11) further comprises a mounting groove (113) for mounting the seal (12), the mounting groove (113) being provided on the first end of the cartridge body (111).

5. A pressurized plugging device according to any one of claims 2-4, wherein the sealing cap (13) is provided with a welding groove and is welded to the second end of the cartridge casing (11).

6. Pressurized plugging device according to claim 1, wherein said pressurized securing assembly (2) comprises:

a pressing plate (21) pressed on one end of the sealing assembly (1) far away from the movable shaft (4);

and one end of the fixing piece (22) is connected with the pressing plate (21), and the other end of the fixing piece is connected with the flange hole (32) of the mounting flange (3).

7. The pressurized plugging device according to claim 6, wherein the pressure plate (21) comprises a plurality of through holes (211) connected with the fixing member (22), and the through holes (211) are arranged to avoid the sealing assembly (1).

8. The pressurized plugging device of claim 7, wherein the through-hole (211) is a long waist hole.

9. Pressurized plugging device according to any one of claims 6-8, wherein said fixing members (22) are bolts and nuts.

10. Pressurized plugging device according to any one of claims 2-4, wherein said sealing member (12) is a sealing ring.