CN216215406U

CN216215406U - Explosion-proof guide cover and gas insulated closed switch equipment with same

Info

Publication number: CN216215406U
Application number: CN202122385248.2U
Authority: CN
Inventors: 杨宏波; 王楚雄; 刘春辉; 罗晶碑; 刘金龙
Original assignee: Siemens High Voltage Switchgear Co Ltd
Current assignee: Siemens High Voltage Switchgear Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-04-05
Anticipated expiration: 2031-09-29

Abstract

The utility model provides an explosion-proof guide cover and gas-insulated closed switch equipment with the same. The explosion-proof guide cover for the gas insulated enclosed switchgear comprises a base, wherein the base is used for being connected with a shell of the gas insulated enclosed switchgear, and an explosion opening for pressure relief is formed in the base; the explosion-proof membrane is fixedly connected to the base and seals the explosion opening; the guide cover is rotatably arranged on the base and is provided with an explosion guide port, and the explosion guide port is communicated with the explosion opening; and the limiting mechanism is arranged between the base and the guide cover and is constructed to limit the guide cover to rotate relative to the base. This GIS is explosion-proof guide cover for equipment installation, use are more convenient.

Description

Explosion-proof guide cover and gas insulated closed switch equipment with same

Technical Field

The utility model relates to the technical field of power equipment, in particular to an explosion-proof guide cover and gas-insulated closed switch equipment with the same.

Background

GIS devices, also known as gas insulated enclosed switchgear, are important switchgear in electrical power equipment. In the power system, control of power transmission can be realized by the GIS device. The GIS equipment can be composed of one or more GIS equipment interval units and a bus, and the bus can be used for connecting an external power grid and a GIS equipment interval and connecting two adjacent GIS equipment intervals. One or more GIS equipment modules are arranged in the GIS equipment interval unit, and the GIS equipment modules include but are not limited to: current Transformers (CT), Disconnectors (DS), earthing switches (ES/FES), circuit breakers, and the like.

In order to ensure insulation, the GIS equipment modules, the bus bars, etc. are filled with an insulating gas (e.g., SF)₆) In order to prevent gas leakage, it is necessary to ensure the sealing performance of the GIS device module, the bus bar, and the like. This causes that if the GIS device module or the bus bar is out of order and the insulating gas expands, the GIS device module or the bus bar may explode or the like, so an explosion-proof structure needs to be arranged on the housing of the GIS device module or the bus bar to control the explosion and reduce the explosion damage. The problem of the existing explosion-proof structure is that the explosion-proof structure can be well installed when GIS equipment modules, buses and the like are produced and delivered from a factory, but in the actual use process, due to different environments of an installation site, the opening orientation of the explosion-proof structure is possibly not in accordance with the requirement of the installation site, the explosion-proof structure needs to be disassembled on site and reinstalled, the difficulty of site loading and unloading is high and tedious, the installation cost of the GIS equipment modules, the buses and the like is increased, and the labor intensity is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides an explosion-proof guide cover, and a gas-insulated enclosed switchgear having the same, to at least partially solve the above problems.

According to a first aspect of the embodiments of the present disclosure, there is provided an explosion-proof guide cover for a gas-insulated enclosed switchgear, including: the base is used for being connected with a shell of the gas insulated closed switch equipment, and an explosion opening for pressure relief is formed in the base; the explosion-proof membrane is fixedly connected to the base and seals the explosion opening; the guide cover is rotatably arranged on the base and is provided with an explosion guide port, and the explosion guide port is communicated with the explosion opening; and the limiting mechanism is arranged between the base and the guide cover and is constructed to limit the guide cover to rotate relative to the base.

Optionally, the base is provided with a plurality of limiting holes, the limiting holes are distributed along the circumferential direction of the guide cover at intervals, the limiting mechanism is telescopically arranged in the guide cover, when the limiting mechanism is in an extension state, at least part of the limiting mechanism extends into the limiting holes to prevent the guide cover from rotating relative to the base, and when the limiting mechanism is in a compression state, the limiting mechanism withdraws from the limiting holes to enable the guide cover to rotate relative to the base.

Optionally, the limiting mechanism includes an elastic member and a limiting member, the elastic member and the limiting member are disposed between the base and the guide cover, and the elastic member is retractable and is configured to apply an acting force toward the limiting hole to the limiting member.

Optionally, the base comprises: the mounting plate is used for being connected with a shell of the gas insulated closed switch equipment, and the explosion opening is arranged on the mounting plate; and the transition flange is arranged on the mounting plate, an accommodating groove for accommodating part of the guide cover is formed between the transition flange and the mounting plate, and part of the guide cover is embedded into the accommodating groove.

Optionally, the transition flange includes a first ring body and a second ring body, the second ring body is disposed at an inner ring of the first ring body, and in an axial direction of the transition flange, a first end surface of the first ring body is flush with a first end surface of the second ring body, a distance is provided between a second end surface of the first ring body and a second end surface of the second ring body, the second end surface of the first ring body is matched with the mounting plate, and an accommodating groove is formed between the second end surface of the second ring body and the mounting plate.

Optionally, the mounting plate is connected to the housing of the gas insulated switchgear through a fastener, the mounting plate is provided with a mounting hole through which the fastener passes, and the first ring body is provided with a fastener avoiding groove for avoiding a portion of the fastener protruding out of the mounting plate.

Optionally, the guiding cover includes a cover body and a third ring body, the cover body is disposed in the third ring body, the third ring body is embedded in the accommodating groove, and the cover body is provided with an explosion guiding opening.

Optionally, a limiting mounting hole is formed in the third ring body, and at least part of the limiting mechanism is arranged in the limiting mounting hole.

Optionally, at least part of the rupture disk is located between the housing and the base of the gas insulated switchgear enclosure, and a sealing structure is provided between the rupture disk and the gas insulated switchgear enclosure.

According to the application, the gas insulation closed type switch equipment comprises a shell and an explosion-proof guide cover arranged on the shell, wherein the explosion-proof guide cover is the explosion-proof guide cover.

The base of the explosion-proof guide cover in the embodiment is used for bearing the explosion-proof membrane, the guide cover, the limiting mechanism and the like. The base is also used for connecting with GIS equipment, thereby reliably installing the explosion-proof guide cover on the GIS equipment. Be provided with the opening on GIS equipment's the casing, correspondingly, also be provided with the explosion opening that is used for the pressure release on the base, and the rupture membrane is fixed on the base, and seal this explosion opening, because the structural strength of rupture membrane is less than the structural strength of GIS equipment of explosion-proof guide cover mounted position department (also the rupture membrane is comparatively weak position on the GIS equipment), consequently when the explosion appears, the impulsive force of explosion can destroy the rupture membrane at first, and discharge through the explosion opening, just so other parts of GIS equipment have been protected, thereby explosion-proof has been realized. Under the conventional state, the explosion-proof membrane seals the explosion opening, so that the air tightness in the GIS equipment can be ensured, and the leakage of insulating gas is prevented. The explosion guiding port on the guide cover is used for guiding the direction of explosion discharge, and other equipment or human damage caused by explosion can be avoided by enabling the explosion guiding port to face the required direction. In order to adapt to different orientation demands, the relative base of guide housing is rotatable, just so makes GIS equipment can conveniently rotate the guide housing according to service environment's concrete demand to the orientation of adjustment explosion guide mouth, so that it can adapt to specific service environment, and need not to carry out whole dismantlement and remounting to explosion-proof guide housing, has promoted the convenience like this, has reduced intensity of labour, has promoted adjustment efficiency, and adaptability is better moreover. And through setting up stop gear and restricting the rotation of guide housing, when having guaranteed not artificially to rotate the guide housing, the orientation of explosion guide opening is fixed, and the guide housing can not just rotate because of less vibration or less external force in the course of the work to ensure that the orientation of explosion guide opening satisfies the demand in the course of the work, and then guaranteed the security.

Drawings

The drawings are only for purposes of illustrating and explaining the embodiments of the present disclosure and are not to be construed as limiting the scope of the embodiments of the present disclosure. Wherein the content of the first and second substances,

FIG. 1 shows a schematic view of an explosion proof guide housing and housing of an embodiment of the present application in mating relation;

FIG. 2 is a schematic perspective view of an explosion-proof guide housing according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional perspective view of an explosion-proof guide housing according to an embodiment of the present application;

FIG. 4 shows a close-up view at I in FIG. 3;

FIG. 5 is a schematic perspective view of the cover of the explosion-proof guide cover according to the embodiment of the application;

fig. 6 shows a schematic perspective view of a transition flange of an explosion-proof guide cover according to an embodiment of the present application.

Description of reference numerals:

10. a base; 11. mounting a plate; 12. a transition flange; 121. a first ring body; 122. a second ring body; 13. a limiting hole; 20. a housing; 21. an explosion opening; 30. an explosion-proof membrane; 40. a guide housing; 41. an explosion guide port; 42. a third ring body; 421. limiting the mounting hole; 43. a cover body; 50. a limiting mechanism; 51. an elastic member; 52. a limiting member; 60. a fastener; 70. and (5) sealing the structure.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the embodiments of the present disclosure, specific embodiments of the present disclosure will now be described with reference to the accompanying drawings.

Before describing the structure of the explosion-proof guide cover in detail, the gas insulated enclosed switchgear will be briefly described as follows:

a gas-insulated enclosed switchgear is also called a gas-insulated enclosed switchgear, which is an electric power apparatus insulated with an insulating gas. Because the existing gas insulated enclosed switchgear needs to meet the requirement of insulation protection, SF (sulfur hexafluoride) is filled into shells of different gas insulated enclosed switchgear modules (such as circuit breakers, current transformers, isolating switches, grounding switches, buses and the like)₆As insulating gas, in order to enable the damage of explosion during the transition expansion of the insulating gas to be more controllable during the working process of the gas-insulated enclosed switchgear, an explosion-proof guide cover is arranged on the gas-insulated enclosed switchgear during the production of the gas-insulated enclosed switchgear, so that the impact of the explosion firstly destroys the explosion-proof guide cover and is discharged from an explosion guide port of the explosion-proof guide cover, and the destruction and direction controllability of the explosion are realized. However, since the environment of the gas insulated enclosed switchgear in use cannot be accurately determined in the production process, there is a problem that the orientation of the explosion guide port of the explosion guide cover mounted on the gas insulated enclosed switchgear does not conform to the environment of use, and it is necessary to detach the explosion guide cover from the gas insulated enclosed switchgear at the time of field mounting, readjust the orientation, and mount the explosion guide cover on the gas insulated enclosed switchgear. And the disassembly is troublesome and inconvenient to operate during field installation, the installation efficiency can be reduced, and the cost and the labor intensity are improved.

In order to solve this problem, the present embodiment provides an explosion-proof guide housing for a gas-insulated enclosed switchgear, which includes a base 10, an explosion-proof membrane 30, a guide housing 40, and a limit mechanism 50. The base 10 is used for connecting with a housing 20 of a gas insulated enclosed switchgear, and an explosion opening 21 for pressure relief is provided on the base 10. The rupture disk 30 is fixedly attached to the base 10, and the rupture disk 30 closes the explosion opening 21. The guide cover 40 is rotatably provided to the base 10, and the guide cover 40 has an explosion introduction port 41, and the explosion introduction port 41 communicates with the explosion opening 21. The limiting mechanism 50 is disposed between the base 10 and the guide cover 40, and the limiting mechanism 50 is configured to limit the rotation of the guide cover 40 relative to the base 10.

The base 10 of the explosion-proof guide housing is used for bearing the explosion-proof membrane 30, the guide housing 40, the limiting mechanism 50 and the like. The base 10 is also used for connection with a gas-insulated enclosed switchgear, thereby reliably mounting the explosion-proof guide housing on the gas-insulated enclosed switchgear. As shown in fig. 1, the housing of the gas insulated enclosed switchgear is provided with an opening, and accordingly, the base 10 is also provided with an explosion opening 21 for pressure relief, and the rupture membrane 30 is fixed on the base 10 and closes the explosion opening 21, because the structural strength of the rupture membrane 30 is lower than that of the gas insulated enclosed switchgear at the installation position of the explosion-proof guide cover (i.e., the rupture membrane 30 is a weaker position on the gas insulated enclosed switchgear), when an explosion occurs, the momentum of the explosion will first break the rupture membrane 30 and be discharged through the explosion opening 21, thus protecting other parts of the gas insulated enclosed switchgear, and thus achieving explosion-proof. In a normal state, the explosion-proof membrane 30 closes the explosion opening 21, which also ensures airtightness of the inside of the gas-insulated enclosed switchgear, preventing leakage of the insulating gas.

The explosion guiding port 41 of the guiding cover 40 is used for guiding the direction of explosion discharge, and the explosion guiding port 41 is directed to a required direction, so that other equipment or people can be prevented from being damaged by explosion. In order to adapt to different orientation requirements, the guide cover 40 can rotate relative to the base 10, so that the gas insulated enclosed switchgear can conveniently rotate the guide cover 40 according to the specific requirements of the use environment, the orientation of the explosion guide port 41 is adjusted, the explosion guide port can adapt to the specific use environment, the explosion guide cover does not need to be integrally disassembled and re-assembled, the convenience is improved, the labor intensity is reduced, the adjustment efficiency is improved, and the adaptability is better.

And through setting up stop gear 50 and restrict the rotation of guide housing 40, guaranteed not have artificial when rotating guide housing 40, the orientation of explosion guide opening 41 is fixed, and guide housing 40 can not just rotate because of less vibration or less external force in the course of the work to the orientation that has ensured explosion guide opening 41 in the course of the work satisfies the demand, and then has guaranteed the security.

The following describes the structure and operation of the explosion-proof guide cover for the gas insulated switchgear in detail with reference to the accompanying drawings:

as shown in fig. 2 to 6, a plurality of limiting holes 13 are provided on the base 10, the limiting holes 13 are distributed at intervals along the circumferential direction of the guide cover 40, and the number and the distribution angle of the limiting holes 13 can be determined as required. For example, if the orientation of the explosion guiding opening 41 on the guiding cover 40 needs to be adjusted more finely, more limiting holes 13 may be provided, for example, the included angle between two adjacent limiting holes 13 is 5 ° or 10 ° or 15 °. If the explosion guiding opening 41 needs to be adjusted sparsely, fewer limiting holes 13 may be provided, for example, an included angle between two adjacent limiting holes 13 is 90 °, and the number of the limiting holes 13 is not limited in this embodiment.

The limiting hole 13 can be used for accommodating part of the limiting mechanism 50, so that the part of the limiting mechanism 50 extending into the limiting hole 13 and the limiting hole 13 form a stop, thereby realizing the stop of the guide cover 40 and preventing the guide cover 40 from rotating accidentally.

Optionally, in order to make the guide cover 40 rotate manually with less effort, the limiting mechanism 50 is a retractable mechanism, the limiting mechanism 50 is disposed on the guide cover 40 in a retractable manner, and when the limiting mechanism 50 is in the extended state, at least a part of the limiting mechanism 50 extends into the limiting hole 13 to prevent the guide cover 40 from rotating relative to the base 10, and when the limiting mechanism 50 is in the compressed state, the limiting mechanism 50 exits from the limiting hole 13 to enable the guide cover 40 to rotate relative to the base 10.

When the guide cover 40 needs to be rotated, the telescopic limiting mechanism 50 can manually apply acting force to the guide cover 40 to enable the guide cover 40 to rotate, so that under the action of the acting force, the limiting mechanism 50 is compressed by the base 10 in the relative movement process of the guide cover 40 and the base 10, and is in a compressed state, at the moment, the limiting mechanism 50 does not form a stop with the limiting hole 13, the guide cover 40 can rotate relative to the base 10, and the rotation is labor-saving.

When the explosion guiding opening 41 of the guiding hood 40 is rotated to a proper orientation, no force is applied to the guiding hood 40, the limiting mechanism 50 automatically returns to the extended state, and a part of the limiting mechanism 50 extends into the limiting hole 13, so that a stop is formed to prevent the guiding hood 40 from rotating relative to the base 10, and the orientation of the explosion guiding opening 41 is ensured to meet the requirement.

In one example, as shown in fig. 4, the limiting mechanism 50 includes an elastic member 51 and a limiting member 52, the elastic member 51 and the limiting member 52 are disposed between the base 10 and the guide cover 40, and the elastic member 51 is retractable and is configured to apply a force to the limiting member 52 toward the inside of the limiting hole 13. This switches the position limiting mechanism 50 between the extended state and the compressed state by the expansion and contraction of the elastic member 51.

The elastic member 51 is a deformable structure such as a spring or a rubber structure, but the embodiment is not limited thereto.

The stop member 52 may be of any suitable construction. Preferably, in order to facilitate the movement of the limiting mechanism 50 to the compressed state, the limiting member 52 has a semi-spherical head or a spherical shape, and since the semi-spherical head or the spherical shape has an arc-shaped surface, it can be more conveniently transited when contacting the base 10, so that the guide housing 40 can be driven to rotate with a smaller force.

Besides the limiting mechanism 50 with such a structure, it may also be a structure such as a limiting pin, and the guide cover 40 is controlled to rotate or not by inserting or pulling the limiting pin.

In this embodiment, the base 10 includes a mounting plate 11 and a transition flange 12 in order to mount the guide housing 40 and ensure that it can rotate relative to the base 10. The mounting plate 11 is used for connection with the housing 20 of the gas-insulated enclosed switchgear, and the explosion opening 21 is provided in the mounting plate 11. The transition flange 12 is mounted on the mounting plate 11, and forms a receiving groove for receiving a part of the guide housing 40 with the mounting plate 11, and the part of the guide housing 40 is embedded in the receiving groove.

The shape, material, etc. of the mounting plate 11 may be determined as needed, as long as it can be connected to the gas insulated enclosed switchgear and the transition flange 12 is mounted. For example, the mounting plate 11 may be a circular plate provided with a plurality of mounting holes for fasteners to pass through. The fasteners are, for example, bolts, screws, or rivets. The mounting plate 11 is connected to the case 20 of the gas insulated switchgear so as to improve the reliability of the installation by means of fasteners 60.

As shown in fig. 2 and 3, at least a part of the rupture membrane 30 is located between the housing 20 and the base 10 of the gas-insulated enclosed switchgear, and a sealing structure 70 is provided between the rupture membrane 30 and the housing 20 of the gas-insulated enclosed switchgear.

For example, the mounting plate 11 presses the explosion-proof membrane 30 and the seal structure 70 against the housing 20 of the gas-insulated enclosed switchgear, thereby achieving fixation of the explosion-proof membrane 30. And the sealing structure 70 can perform sealing to prevent the leakage of the insulating gas from the gap between the explosion-proof membrane 30 and the gas-insulated enclosed switchgear, thereby improving the sealing property.

The seal structure 70 may be a suitable structure capable of providing a seal, such as a gasket, a rubber packing, or the like, without limitation. In order to fit the sealing structure, a groove for accommodating the sealing structure 70 may be provided on the gas insulated enclosed switchgear.

As shown in fig. 6, in order to form a receiving groove for receiving a portion of the guide cover 40 by being engaged with the mounting plate 11, the transition flange 12 includes a first ring 121 and a second ring 122, the second ring 122 is disposed inside the first ring 121, and in an axial direction of the transition flange 12, a first end surface of the first ring 121 is flush with a first end surface of the second ring 122, a second end surface of the first ring 121 is spaced apart from a second end surface of the second ring 122, the second end surface of the first ring 121 is engaged with the mounting plate 11, and a receiving groove is formed between the second end surface of the second ring 122 and the mounting plate 11.

During fitting, the transition flange 12 may be pressed on the mounting plate 11, and since the thickness (i.e., the axial length) of the first ring body 121 is greater than the thickness of the second ring body 122, when the second end surface of the first ring body 121 is attached to the mounting plate 11, a gap is formed between the second end surface of the second ring body 122 and the mounting plate 11, and the gap is an accommodating groove.

In this embodiment, the limiting hole 13 is disposed on the second ring 122, so that when the guiding cover 40 is engaged with the base 10, the limiting hole 13 is engaged with the limiting mechanism 50 to limit the guiding cover 40.

In order to ensure that the first ring body 121 can be reliably matched with the mounting plate 11, a fastener avoiding groove for avoiding a part of the fastener 60 protruding out of the mounting plate 11 is arranged on the first ring body 121. In addition, in order to ensure the stable connection between the transition flange 12 and the mounting plate 11, and thus ensure the reliable installation of the guide cover 40, the first ring body 121 is further provided with a first fastening hole, and the mounting plate 11 is further provided with a second fastening hole, and a fastening member (such as a bolt or the like) passes through the first fastening hole and is in threaded fit with the second fastening hole, so as to lock the transition flange 12 to the mounting plate 11.

As shown in fig. 3 and 5, the guide cover 40 includes a cover body 43 and a third ring body 42, the cover body 43 is disposed in the third ring body 42, the third ring body 42 is inserted into the accommodating recess, and the cover body 43 is provided with an explosion guiding opening 41.

In this embodiment, the cover 43 may be integrally formed with the third ring 42, or may be separately formed and then connected by machining, which is not limited thereto. The cover 43 is provided with an explosion guiding port 41 to guide the direction of explosion discharge, so that the explosion can be controlled, and the explosion hazard can be reduced.

The third ring 42 is adapted to at least partially extend into the receiving recess to be compressed by the transition flange 12 and the mounting plate 11, so as to achieve a secure connection between the guide cover 40 and the base 10.

Optionally, in order to better limit the limiting mechanism 50, a limiting and limiting installation hole 421 is formed in the third ring body 42, and at least a part of the limiting mechanism 50 is disposed in the limiting and installing hole 421. For example, the elastic member 51 of the position limiting mechanism 50 may be at least partially disposed in the position limiting installation hole 421, so as to not only accommodate the elastic member, but also guide the expansion and contraction of the elastic member, thereby improving the stability thereof.

In this way, in the production process of the gas-insulated enclosed switchgear, the mounting plate 11 can be fastened to the gas-insulated enclosed switchgear, and the rupture disk 30 can be pressed against the gas-insulated enclosed switchgear by using the mounting plate 11. Then, the limiting mechanism 50 is arranged on the guide cover 40, the guide cover 40 is placed on the mounting plate 11, the transition flange 12 is arranged on the guide cover 40, the transition flange 12 and the mounting plate 11 are locked by a fastening member such as a bolt, and the direction of the explosion guiding port 41 of the guide cover 40 can be any direction.

When the gas insulated enclosed switchgear is placed in a use environment, if the orientation of the explosion guiding opening 41 needs to be adjusted, the guide housing 40 can be manually rotated, and during the rotation, the limiting member 52 of the limiting mechanism 50 moves along with the rotation, so as to compress the elastic member 51 and be pulled out of the limiting hole 13 which is currently matched with the elastic member. After the orientation of the explosion guiding port 41 is adjusted to the right position, the guiding cover 40 is released, and the limiting member 52 is driven to extend into the corresponding limiting hole 13 under the restoring force of the elastic member 51, so that the guiding cover 40 is limited. Thus, even if the subsequent guide cover 40 is subjected to vibration or impact, if the force for rotating the subsequent guide cover is not enough to make the limiting member 52 come out of the limiting hole 13, the orientation of the explosion guide port 41 is not changed, and the safety is ensured.

According to another aspect of the present application, there is provided a gas insulated enclosed switchgear including a housing and an explosion-proof guide housing disposed in the housing, the explosion-proof guide housing being the above-mentioned explosion-proof guide housing. The gas insulation closed switch equipment using the explosion-proof guide cover can protect the safety of people and articles to a greater extent, and can reduce the workload of installation and adjustment of the explosion-proof guide cover and reduce the labor intensity. Even if the orientation of explosion guide port 41 is unreasonable (if towards the passageway that the people passed through or towards the higher equipment of degree of danger) when using, also can conveniently adjust the orientation, need not loaded down with trivial details bolt dismantlement process, also need not dismantle whole explosion-proof guide cover and get off readjustment orientation and install to efficiency has been promoted, also avoided the potential safety hazard.

This explosion-proof guide cover is pressed through setting up the transition flange and is established the guide cover for the base rotates relatively to the guide cover, and uses stop gear to restrict the rotation of guide cover, guarantees to ensure that it can not change the orientation because of accident at will after the orientation adjustment of explosion guide opening is fit for, has both guaranteed the convenience of adjustment, has guaranteed the reliability again, and has reduced the work load of explosion-proof guide cover installation, design, has promoted efficiency, the cost is reduced.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above description is only an exemplary embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any person skilled in the art should be able to make equivalent changes, modifications and combinations without departing from the concept and principle of the embodiments of the present disclosure.

Claims

1. An explosion-proof guide cover for a gas-insulated enclosed switchgear, comprising:

the base (10) is used for being connected with a shell (20) of the gas insulated closed type switch equipment, and an explosion opening (21) for pressure relief is formed in the base (10);

an explosion-proof membrane (30), wherein the explosion-proof membrane (30) is fixedly connected to the base (10), and the explosion-proof membrane (30) closes the explosion opening (21);

a guide cover (40), the guide cover (40) being rotatably provided to the base (10), the guide cover (40) having an explosion introduction port (41), the explosion introduction port (41) communicating with the explosion opening (21);

a limiting mechanism (50), wherein the limiting mechanism (50) is arranged between the base (10) and the guide cover (40), and the limiting mechanism (50) is configured to limit the guide cover (40) to rotate relative to the base (10).

2. The explosion-proof guide cover for the gas-insulated enclosed switchgear according to claim 1, wherein a plurality of limiting holes (13) are formed in the base (10), the limiting holes (13) are spaced apart from each other along the circumferential direction of the guide cover (40), the limiting mechanism (50) is telescopically disposed in the guide cover (40), and when the limiting mechanism (50) is in an extended state, at least a portion of the limiting mechanism (50) extends into the limiting holes (13) to prevent the guide cover (40) from rotating relative to the base (10), and when the limiting mechanism (50) is in a compressed state, the limiting mechanism (50) is withdrawn from the limiting holes (13) to enable the guide cover (40) to rotate relative to the base (10).

3. The explosion-proof guide housing for a gas-insulated enclosed switchgear according to claim 2, wherein the position-limiting mechanism (50) comprises an elastic member (51) and a position-limiting member (52), the elastic member (51) and the position-limiting member (52) being disposed between the base (10) and the guide housing (40), the elastic member (51) being retractable and serving to apply a force to the position-limiting member (52) toward the inside of the position-limiting hole (13).

4. Explosion-proof guide hood for gas-insulated enclosed switchgear according to any of claims 1-3, characterized in that the base (10) comprises:

a mounting plate (11), the mounting plate (11) being used for connecting with a housing (20) of the gas insulated switchgear enclosure, the explosion opening (21) being provided on the mounting plate (11);

the transition flange (12) is mounted on the mounting plate (11), a containing groove used for containing a part of the guide cover (40) is formed between the transition flange (12) and the mounting plate (11), and a part of the guide cover (40) is embedded into the containing groove.

5. The explosion-proof guide cover for the gas insulated enclosed switchgear according to claim 4, wherein the transition flange (12) comprises a first ring body (121) and a second ring body (122), the second ring body (122) is disposed inside the first ring body (121), and in an axial direction of the transition flange (12), a first end surface of the first ring body (121) and a first end surface of the second ring body (122) are flush, a space is provided between a second end surface of the first ring body (121) and a second end surface of the second ring body (122), the second end surface of the first ring body (121) is fitted with the mounting plate (11), and the accommodating groove is formed between the second end surface of the second ring body (122) and the mounting plate (11).

6. The explosion-proof guide cover for the gas-insulated enclosed switchgear according to claim 5, wherein the mounting plate (11) is connected to the housing (20) of the gas-insulated enclosed switchgear through a fastening member (60), the mounting plate (11) is provided with a mounting hole through which the fastening member (60) passes, and the first ring body (121) is provided with a fastening member avoiding groove for avoiding a portion of the fastening member (60) protruding out of the mounting plate (11).

7. The explosion-proof guide housing for gas-insulated enclosed switchgear according to claim 4, wherein the guide housing (40) comprises a housing body (43) and a third ring body (42), the housing body (43) being disposed in the third ring body (42), the third ring body (42) being fitted into the receiving recess, the housing body (43) being provided with the explosion guiding opening (41).

8. The explosion-proof guide cover for gas-insulated enclosed switchgear according to claim 7, wherein the third ring body (42) is provided with a limit mounting hole (421), and at least a part of the limit mechanism (50) is disposed in the limit mounting hole (421).

9. The explosion-proof guide housing for a gas-insulated enclosed switchgear according to claim 1, wherein at least a part of the explosion-proof membrane (30) is located between the housing (20) of the gas-insulated enclosed switchgear and the base (10), and a sealing structure (70) is provided between the explosion-proof membrane (30) and the housing (20) of the gas-insulated enclosed switchgear.

10. A gas insulated enclosed switchgear, comprising a housing and an explosion-proof guide housing provided in the housing, the explosion-proof guide housing being as claimed in any one of claims 1 to 9.