Protective device and gas-insulated totally-enclosed combined electric appliance

Abstract

The utility model discloses a protection device and a gas insulation totally-enclosed composite apparatus. The protection device comprises a transition flange which is provided with a flange hole. The anti-explosion mechanism comprises an annular pressing plate and an anti-explosion piece, the annular pressing plate is arranged in the circumferential direction of the flange hole and fixedly connected to one side of the transition flange, the flange hole is covered with the anti-explosion piece, and the periphery of the anti-explosion piece is fixed between the annular pressing plate and the transition flange; the damp-proof mechanism comprises an adsorbent cover, the adsorbent cover is used for containing an adsorbent and arranged on the other side of the transition flange, and a gap is formed between the adsorbent cover and the transition flange in the axial direction of the transition flange, so that when the anti-explosion piece is broken, the adsorbent cover is separated from the transition flange. And gas in the gas insulation totally-enclosed combined electric appliance can be discharged from the interval along the flange hole. The protection device provided by the utility model integrates explosion-proof and moisture-proof functions, is compact in structure and convenient to assemble, and reduces the installation time.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power engineering equipment, in particular to a protective device and a gas-insulated fully enclosed combined electrical appliance. Background Art

[0002] Gas-insulated fully enclosed switchgear is abbreviated as GIS. GIS has the advantages of small size, small footprint, no influence from the external environment, safe and reliable operation, simple maintenance and long maintenance cycle. Therefore, it is very popular among users and has been widely used in various substations in the national power system. The normally operating GIS is filled with insulating gas of a certain pressure as the insulating medium. In order to ensure the long-term safe operation of GIS after being connected to the power system, all gas chambers must consider the explosion-proof device and moisture-proof device of the equipment during design. The main function of the explosion-proof device is to prevent the internal gas pressure from rising instantly. The explosion-proof device will rupture first and then protect the tank body. The moisture-proof device absorbs the moisture and related suspended impurities inside the tank body, thereby effectively maintaining the cleanliness of the gas inside the tank body. Under the action of the two devices, the high-voltage switch can be guaranteed to have stable operation and good performance. Adding two devices to the GIS tank body separately will lead to problems such as reduced safety, increased manufacturing costs, increased probability of gas leakage, insufficient surface space of the tank body or unsightly appearance. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a protective device which integrates explosion-proof and moisture-proof functions, has a compact structure, is easy to assemble, reduces installation time, and reduces the manufacturing and assembly costs of electrical equipment.

[0004] The utility model also provides a gas-insulated fully enclosed combined electrical appliance adopting the protective device.

[0005] According to the protective device of the first aspect of the utility model, the embodiment comprises a transition flange, an explosion-proof mechanism and a moisture-proof mechanism, wherein the transition flange has a flange hole; the explosion-proof mechanism comprises an annular pressure plate and an explosion-proof disk, wherein the annular pressure plate is arranged along the circumference of the flange hole and is fixedly connected to one side of the transition flange, the explosion-proof disk covers the flange hole, and the periphery of the explosion-proof disk is fixed between the annular pressure plate and the transition flange; the moisture-proof mechanism comprises an adsorbent cover, wherein the adsorbent cover is used to accommodate an adsorbent, and the adsorbent cover is arranged on the other side of the transition flange, and there is a gap between the adsorbent cover and the transition flange along the axial direction of the transition flange, so that when the explosion-proof disk ruptures, the gas in the gas-insulated fully enclosed combination electrical appliance can leak out from the gap along the flange hole.

[0006] The protective device according to the embodiment of the utility model has at least the following beneficial effects: the protective device of the utility model integrates explosion-proof and moisture-proof, has a compact structure, is easy to assemble, and reduces installation time; the number of opening flanges on the electrical equipment is reduced, and the explosion-proof and moisture-proof functions can be achieved by fixing the transition flange on one flange, thereby reducing the manufacturing cost; the overall structure is simple, the bolt connection is easy to disassemble and replace, and the number of structural bolts installed separately is reduced, which is convenient for maintenance; taking into account the indoor and outdoor usage scenarios, the environmental applicability is strong.

[0007] According to some embodiments of the utility model, an opening is provided on one axial side of the adsorbent cover, a partition is provided at the opening, the partition blocks the opening and is connected to the adsorbent cover, a radial side wall of the adsorbent cover is provided with a plurality of adsorption holes, and the adsorption holes are connected to the inner cavity of the adsorbent cover.

[0008] According to some embodiments of the present invention, the adsorption holes are arranged on the radial side wall of the adsorbent cover at the upper part of the axis of the adsorbent cover.

[0009] According to some embodiments of the utility model, a plurality of support columns are provided between the adsorbent cover and the transition flange, the support columns are provided with through holes along their axial directions, and the adsorbent cover and the transition flange are detachably connected via fasteners passing through the through holes.

[0010] According to some embodiments of the utility model, a deflector is provided on the transition flange, and the deflector includes a mounting member and a deflector plate. The mounting member is arranged along the circumference of the flange hole and is fixedly connected to the transition flange or the annular pressure plate. The deflector plate is connected to the mounting member. When the explosion-proof disk ruptures, the deflector plate is used to guide the gas in the gas-insulated fully enclosed combination electrical appliance to be ejected in a direction deviating from the axial direction of the flange hole.

[0011] According to some embodiments of the utility model, a guide channel is formed between the guide plate and the mounting member, the axis of the guide channel is perpendicular to the axis of the flange hole, and when the explosion-proof disk ruptures, the guide plate guides the gas in the gas-insulated fully enclosed combination electrical appliance to spray out in a direction perpendicular to the axial direction of the flange hole.

[0012] According to some embodiments of the utility model, a plurality of drainage grooves are provided on a side of the mounting member close to the transition flange, the plurality of drainage grooves are arranged along the circumference of the flange hole, and the drainage grooves are connected to the guide channel.

[0013] According to some embodiments of the present utility model, a waterproof plate is provided on one side of the explosion-proof disk facing away from the adsorbent cover, and the waterproof plate is sealed in the flange hole.

[0014] According to some embodiments of the utility model, the mating surface of the transition flange is provided with at least two annular sealing grooves, and the at least two sealing grooves are arranged at intervals along the radial direction of the flange hole, and the sealing grooves are used to set sealing members.

[0015] The gas-insulated fully-enclosed combined electrical appliance according to the second embodiment of the utility model comprises the protective device described in any one of the above embodiments.

[0016] The gas-insulated fully-enclosed combined electrical appliance proposed in the embodiment of the utility model includes the protective device of any of the above-mentioned technical solutions, and therefore has all the beneficial effects of the protective device, which will not be described one by one here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a protective device according to an embodiment of the utility model;

[0020] Figure 2 A partial structural cross-sectional view of a protective device according to an embodiment of the utility model;

[0021] Figure 3 This is a structural schematic diagram of a moisture-proof mechanism of a protective device according to an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the assembly of a protective device and an electrical device according to an embodiment of the utility model;

[0023] Figure 5 This is an assembly cross-sectional view of a protective device and electrical equipment according to an embodiment of the utility model.

[0024] Figure Number:

[0025] Protective device 10;

[0026] Transition flange 100, flange hole 110, deflector 120, mounting member 121, deflector plate 122, drainage groove 123, deflector channel 124, waterproof plate 130, fixing plate 140, sealing groove 150;

[0027] Explosion-proof mechanism 200, annular pressure plate 210, explosion-proof disk 220;

[0028] Moisture-proof mechanism 300, adsorbent cover 310, inner cavity 311, opening 312, adsorption hole 313, partition 320, support column 330;

[0029] Tank body 400 , opening 410 , flange 420 . DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the descriptions involving orientation, such as left, right, etc., the orientation or positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] The protective device 10 proposed in the embodiment of the utility model can be applied to gas-insulated fully enclosed combined electrical appliances and other sealed electrical equipment. The protective device 10 of the embodiment of the utility model is specifically described below by taking the application of the protective device 10 in a gas-insulated fully enclosed combined electrical appliance as an example.

[0035] Reference Figure 1 , Figure 3 , Figure 4 The protective device 10 proposed in the embodiment of the utility model includes a transition flange 100, an explosion-proof mechanism 200 and a moisture-proof mechanism 300. The transition flange 100 has a flange hole 110, an opening 410 is provided on the tank body 400 of the gas-insulated fully enclosed combination electrical appliance, a flange 420 is installed on the outer side of the tank body 400 around the opening 410, the transition flange 100 is connected to the flange 420, and the flange hole 110 is opposite to and connected to the opening 410.

[0036] The explosion-proof mechanism 200 includes an annular pressure plate 210 and an explosion-proof piece 220. The annular pressure plate 210 is arranged along the circumference of the flange hole 110 and is fixedly connected to a side of the transition flange 100 away from the inner cavity of the tank body 400. The explosion-proof piece 220 covers the flange hole 110, and the periphery of the explosion-proof piece 220 is fixed between the annular pressure plate 210 and the transition flange 100. The explosion-proof piece 220 can rupture under a certain pressure.

[0037] The moisture-proof mechanism 300 includes an adsorbent cover 310, which is used to contain an adsorbent. The adsorbent cover 310 is arranged on one side of the transition flange 100 close to the inner cavity of the tank body 400 and is located inside the tank body 400. The adsorbent is used to adsorb moisture and suspended impurities inside the tank body 400, thereby effectively maintaining the cleanliness of the gas inside the tank body 400. The explosion-proof mechanism 200 cooperates with the mechanism to ensure that the gas-insulated fully enclosed combination electrical appliance operates stably and has good performance. Along the axial direction of the transition flange 100, there is a gap between the adsorbent cover 310 and the transition flange 100, so that when the explosion-proof disk 220 ruptures, the gas in the gas-insulated fully enclosed combination electrical appliance can leak out from the gap along the flange hole 110.

[0038] The protective device 10 of the utility model integrates explosion-proof and moisture-proof functions, has a compact structure, is easy to assemble, and reduces installation time; the number of openings 410 and flanges 420 on the electrical equipment is reduced, and the explosion-proof and moisture-proof functions can be achieved by fixing the transition flange 100 on one flange 420, thereby reducing the manufacturing cost; the overall structure is simple, the bolt connection is easy to disassemble and replace, and the number of bolts is reduced compared to separately installed structures, which is convenient for maintenance; taking into account indoor and outdoor usage scenarios, the environmental applicability is strong.

[0039] Reference Figure 3 , Figure 5 In some embodiments, an opening 312 is provided on one axial side of the adsorbent cover 310, and a partition 320 is provided at the opening 312. The partition 320 is connected to the adsorbent cover 310, and the partition 320 is used to block the opening 312. The adsorbent can be sealed in the adsorbent cover 310 through the partition 320, and the partition 320 can prevent the adsorbent from being sprayed out along with the gas when the explosion-proof disk 220 ruptures and releases pressure. The radial side wall of the adsorbent cover 310 is provided with a plurality of adsorption holes 313, and the adsorption holes 313 are connected to the inner cavity 311 of the adsorbent cover 310. The moisture and suspended impurities inside the tank body 400 can enter the adsorbent cover 310 through the adsorption holes 313, so that the adsorbent can play a corresponding adsorption effect. The adsorbent cover 310 adopting the above-mentioned form has a simple structure and is easy to process.

[0040] Reference Figure 3 , Figure 5In some embodiments, the adsorption hole 313 is disposed on the radial side wall of the adsorbent cover 310 at the upper part of the axis of the adsorbent cover 310 , thereby preventing the adsorbent in the adsorbent cover 310 from falling from the adsorption hole 313 to keep the tank body 400 clean.

[0041] Reference Figure 3 , Figure 5 In some embodiments, a plurality of support columns 330 are provided between the adsorbent cover 310 and the transition flange 100. The plurality of support columns 330 are arranged along the circumference of the flange hole 110. The support columns 330 are provided with through holes along their axial directions. The adsorbent cover 310 is provided with an assembly hole. The transition flange 100 is provided with threaded holes. Fasteners such as screws and bolts pass through the assembly holes of the adsorbent cover 310 and the through holes of the support columns 330, and are threadedly connected with the threaded holes on the transition flange 100, thereby fixing the adsorbent cover 310 on the transition flange 100. In addition, the adsorbent cover 310 can be removed from the transition flange 100 by removing the fasteners, thereby realizing a detachable connection between the adsorbent cover 310 and the transition flange 100, so as to facilitate the replacement of the adsorbent in the adsorbent cover 310. In addition, through the plurality of support columns 330, a predetermined interval can be provided between the adsorbent cover 310 and the transition flange 100 to prevent the adsorbent cover 310 from blocking the flange hole 110.

[0042] Reference Figure 1 , Figure 5 In some embodiments, a deflector 120 is provided on the transition flange 100, and the deflector 120 includes a mounting member 121 and a deflector plate 122. The mounting member 121 is arranged along the circumference of the flange hole 110, and the mounting member 121 can be fixedly connected to the annular pressure plate 210, or fixedly connected to the transition flange 100, and the deflector plate 122 is connected to the mounting member 121. When the explosion-proof disk 220 ruptures, the deflector plate 122 is used to guide the gas in the gas-insulated fully enclosed combination electrical appliance to be ejected in a direction deviating from the axial direction of the flange hole 110, thereby changing the gas ejection direction through the deflector 120, reducing the destructiveness of the ejected gas, and preventing the gas in the tank body 400 from being directly ejected, avoiding harm to other equipment or operators, and due to the isolation of the deflector 120, a certain gas pressure can be consumed, reducing the impact force of the gas during pressure relief, and at the same time, the deflector 120 can also block external rainwater from entering the flange hole 110.

[0043] Reference Figure 1 , Figure 5In some embodiments, a guide channel 124 is formed between the guide plate 122 and the mounting member 121, and the axis of the guide channel 124 is perpendicular to the axis of the flange hole 110. When the explosion-proof disk 220 ruptures, the guide plate 122 guides the gas in the gas-insulated fully enclosed combination electrical appliance to be ejected in a direction perpendicular to the axial direction of the flange hole 110, thereby further improving the protection performance of the guide cover 120 and preventing the ejected gas from harming the operator or other equipment.

[0044] Reference Figure 1 In some embodiments, a plurality of drainage grooves 123 are provided on one side of the mounting member 121 close to the transition flange 100. The plurality of drainage grooves 123 are arranged along the circumference of the flange hole 110. The drainage grooves 123 are connected to the guide channel 124. The drainage grooves 123 can drain rainwater dripping on the transition flange 100 in time. Moreover, since the mounting member 121 is provided with drainage grooves 123 connected to the guide channel 124 in four directions of up, down, left and right, even when the opening of the guide channel 124 faces upward during installation, rainwater dripping in the guide channel 124 can be discharged through the drainage grooves 123, thereby avoiding the problem of water accumulation in the guide channel 124.

[0045] Reference Figure 2 In some embodiments, a waterproof plate 130 is provided on one side of the explosion-proof plate 220. The waterproof plate 130 is located on the side of the explosion-proof plate 220 away from the adsorbent cover 310. The waterproof plate 130 is blocked in the flange hole 110, and the periphery of the waterproof plate 130 is fixedly connected to the annular pressure plate 210 through the fixing plate 140. The waterproof plate 130 can prevent the explosion-proof plate 220 from being damaged by adverse external conditions such as rain, and prevent the installer from accidentally touching the explosion-proof plate 220 during installation and disassembly, so as to avoid the explosion-proof plate being directly exposed to the environment and causing damage and failure. Moreover, when the tank body 400 of the gas-insulated fully enclosed combination electrical appliance is depressurized due to excessive pressure, the gas in the tank body 400 needs to break through the explosion-proof plate 220 and the waterproof plate 130. Therefore, the waterproof plate 130 can also offset part of the pressure relief energy and reduce the impact force of the ejected gas. When the gas pressure in the tank body 400 of the gas-insulated fully enclosed combination electrical appliance is greater than the destruction pressure, the gas in the tank body 400 breaks through the explosion-proof disk 220 and the waterproof plate 130, and the gas is discharged from the periphery of the adsorbent cover 310. Under the action of the guide cover 120, the gas with a certain pressure is discharged to the surroundings, thereby relieving the pressure of the tank body 400 of the gas-insulated fully enclosed combination electrical appliance.

[0046] Reference Figure 2In some embodiments, the mating surface of the transition flange 100 is provided with two annular sealing grooves 150, and the two sealing grooves 150 are arranged at intervals along the radial direction of the flange hole 110. The sealing grooves 150 are used to set a seal. By setting the two sealing grooves 150, the tank body 400 of the gas-insulated fully enclosed combination electrical appliance is effectively prevented from leaking water and air. In addition, compared with the structural type in which the explosion-proof mechanism 200 and the moisture-proof mechanism 300 are installed separately, the number of sealing surfaces of the flange 420 is reduced, and the probability of air leakage on the sealing surface of the flange 420 is reduced.

[0047] It is understandable that three or more sealing grooves 150 on the mating surface of the transition flange 100 may be provided according to the actual situation, which is not limited here.

[0048] The gas-insulated fully enclosed switchgear provided in the second embodiment of the utility model includes the protection device 10 described in any of the above embodiments. The gas-insulated fully enclosed switchgear provided in the embodiment of the utility model includes the protection device 10 of any of the above technical solutions, and thus has all the beneficial effects of the protection device 10, which will not be described one by one here.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0050] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A protective device for a gas-insulated fully enclosed switchgear, characterized in that: include: A transition flange having a flange hole; An explosion-proof mechanism, comprising an annular pressure plate and an explosion-proof disc, wherein the annular pressure plate is arranged along the circumference of the flange hole and is fixedly connected to one side of the transition flange, the explosion-proof disc covers the flange hole, and the periphery of the explosion-proof disc is fixed between the annular pressure plate and the transition flange; The moisture-proof mechanism comprises an adsorbent cover, wherein the adsorbent cover is used to contain adsorbent, and the adsorbent cover is arranged on the other side of the transition flange. Along the axial direction of the transition flange, there is a gap between the adsorbent cover and the transition flange, so that when the explosion-proof disk ruptures, the gas in the gas-insulated fully enclosed combination electrical appliance can leak out from the gap along the flange hole.

2. The protective device according to claim 1, characterized in that: An opening is provided on one axial side of the adsorbent cover, a partition is provided at the opening, the partition blocks the opening and is connected to the adsorbent cover, a plurality of adsorption holes are provided on the radial side wall of the adsorbent cover, and the adsorption holes are communicated with the inner cavity of the adsorbent cover.

3. The protective device according to claim 2, characterized in that: The adsorption holes are arranged on a radial side wall of the adsorbent cover at an upper portion of an axis of the adsorbent cover.

4. The protective device according to claim 1, 2 or 3, characterized in that: A plurality of support columns are arranged between the adsorbent cover and the transition flange. The support columns are provided with through holes along their axial directions. The adsorbent cover and the transition flange are detachably connected via fasteners penetrating through the through holes.

5. The protection device according to claim 1, characterized in that: The transition flange is provided with a deflector, which includes a mounting member and a deflector plate. The mounting member is arranged along the circumference of the flange hole and is fixedly connected to the transition flange or the annular pressure plate. The deflector plate is connected to the mounting member. When the explosion-proof disk ruptures, the deflector plate is used to guide the gas in the gas-insulated fully enclosed combination electrical appliance to be ejected in a direction deviating from the axial direction of the flange hole.

6. The protection device according to claim 5, characterized in that: A guide channel is formed between the guide plate and the mounting member, the axis of the guide channel is perpendicular to the axis of the flange hole, and when the explosion-proof disk ruptures, the guide plate guides the gas in the gas-insulated fully enclosed combination electrical appliance to be ejected in a direction perpendicular to the axial direction of the flange hole.

7. The protection device according to claim 6, characterized in that: A plurality of drainage grooves are provided on one side of the mounting member close to the transition flange. The plurality of drainage grooves are arranged along the circumference of the flange hole, and the drainage grooves are communicated with the guide channel.

8. The protection device according to claim 1, characterized in that: A waterproof plate is provided on one side of the explosion-proof plate away from the adsorbent cover, and the waterproof plate is sealed in the flange hole.

9. The protection device according to claim 1, characterized in that: The butt joint surface of the transition flange is provided with at least two annular sealing grooves, and the at least two sealing grooves are arranged at intervals along the radial direction of the flange hole, and the sealing grooves are used to set sealing members.

10. A gas-insulated fully enclosed switchgear, characterized in that: The invention comprises a protective device as claimed in any one of claims 1 to 9.

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