CN111628442A - Air chamber structure and gas-insulated metal-enclosed switchgear - Google Patents

Abstract

The invention provides a gas chamber structure and gas-insulated metal-enclosed switchgear, which belong to the technical field of gas-insulated metal-enclosed switches and comprise a shell, a sealing cover and a basin-type insulator; one side opening periphery is equipped with the first flange of being connected with sealed lid, and sealed lid medial surface is equipped with first seal groove, is equipped with first sealing ring on the first flange, and first sealing ring includes first sealing and second sealing, and first sealing and second sealing are the contained angle setting, the first sealing other end with first seal groove lateral wall butt, the second sealing other end and first seal groove tank bottom butt, be equipped with the second sealing ring of one end and first seal groove rigid coupling in the first seal groove, the second sealing ring other end and the butt in the first sealing outside, first sealing ring and second sealing ring are elastic component. The gas chamber structure and the gas insulated metal-enclosed switchgear provided by the invention have a plurality of sealing contact nodes, so that the effectiveness of the sealing structure is effectively ensured, and the service life of the sealing structure is prolonged.

Description

Air chamber structure and gas-insulated metal-enclosed switchgear

Technical Field

The invention belongs to the technical field of gas-insulated metal-enclosed switches, and particularly relates to a gas chamber structure and gas-insulated metal-enclosed switchgear comprising the same.

Background

The gas insulated metal enclosed switchgear (GIS) is a metal enclosed switchgear and control equipment at least partially using gas above atmospheric pressure as insulating medium, and is composed of breaker, isolating switch, grounding switch, mutual inductor, lightning arrester, bus, connecting piece and outlet terminal, all of which are enclosed in a metal grounded shell, and filled with SF6 insulating gas with certain pressure, so it is also called SF6 totally enclosed combined electrical appliance. In the GIS equipment, some parts are provided with air chambers for charging and discharging SF6 insulating gas, and the sealing performance of the air chambers can influence the reliability and the safety of the equipment operation. Because use flange structural connection between the shell of air chamber and the sealed lid to adopt conventional sealing ring setting at contact position between them, after using a period, the sealing ring is ageing easily, and then makes local contact position (with the contact position of shell or sealed lid) the tiny gap appears, makes the sealing effect local failure of sealing ring, causes gas leakage easily, influences the safety in utilization.

Disclosure of Invention

The invention aims to provide a gas chamber structure and gas-insulated metal-enclosed switchgear, and aims to solve the problem that a sealing structure of a shell and a sealing cover in the prior art is prone to failure.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a plenum structure comprising: the insulator comprises a shell, a sealing cover arranged at an opening at one side of the shell and a basin-shaped insulator arranged at an opening at the other side of the shell; one side the opening periphery be equipped with the first flange of sealed lid connection, sealed lid medial surface is equipped with first seal groove, be equipped with first sealing ring on the first flange, first sealing ring include one end with the first sealing and one end of first flange rigid coupling with the second sealing of first sealing other end rigid coupling, first sealing with the second sealing is the contained angle setting, the first sealing other end with first seal groove lateral wall butt, the second sealing other end with first seal groove tank bottom butt, be equipped with in the first seal groove one end with the second sealing ring of first seal groove rigid coupling, the second sealing other end with first sealing outside butt, first sealing with the second sealing ring is elastic component.

As another embodiment of this application, first sealing portion include with the first connector and one end of first flange rigid coupling with the first seal that first connector is connected, the other end of first seal be used for with first seal groove lateral wall butt, the one end of second sealing portion with the other end of first seal is connected, and with first seal is the contained angle setting.

In another embodiment of the present application, a compression spring coil is disposed at a joint of the first sealing body and the second sealing portion.

As another embodiment of this application, be equipped with the orientation on the first flange the open-ended second seal groove of sealing cover, the second seal groove is the ring channel, the second seal groove is close to and is equipped with first connection arch on the lateral wall of the cavity that the shell formed, be equipped with on the lateral wall of first connector be used for with first connection arch joint complex first connection ring channel.

As another embodiment of the present application, the first coupling projection has a rectangular axial cross-section.

As another embodiment of the present application, one end of the first connecting body abuts against a groove bottom of the second seal groove.

As another embodiment of this application, first seal groove is circular slot, the second sealing ring include with the second connector and one end of first seal groove tank bottom rigid coupling with the second seal that the second connector is connected, the second seal with the tank bottom of first seal groove is personally submitted the contained angle setting, the other end of second seal with the outside butt of first connector.

As another embodiment of this application, be equipped with the spacing groove on the lateral surface of first connector, the spacing groove is used for holding the other end of second seal.

As another embodiment of this application, be equipped with the second on the first seal groove and connect the arch, be equipped with on the second connector with second connection protruding joint complex second connects the annular.

As another embodiment of this application, the opposite side opening part of shell is equipped with the second flange, basin formula insulator includes conduction portion, locates the insulator of conduction portion periphery and locating the third flange of insulator periphery, the third flange with second flange joint, the surface of insulator is equipped with the protruding muscle of enhancement of latticed distribution.

As another embodiment of the present application, a third sealing groove is formed in one side of the insulator body facing the second flange, a third sealing ring is arranged in the third sealing groove, a fourth sealing groove corresponding to the third sealing groove is formed in the second flange, and a fourth sealing ring used for abutting against the third sealing ring is arranged in the fourth sealing groove; the sealing structure is characterized in that a plurality of first sealing bulges are arranged on the third sealing ring and distributed along the radial direction of the third sealing ring at intervals, a first slot is formed between every two adjacent first sealing bulges, a plurality of second sealing bulges are arranged on the fourth sealing ring and distributed along the radial direction of the fourth sealing ring at intervals, a second slot is formed between every two adjacent second sealing bulges, the first sealing bulges are inserted into the second slots in an interference mode, and the second sealing bulges are inserted into the first slots in an interference mode.

As another embodiment of this application, first sealed protruding with the sealed bellied top surface of second is the arcwall face, first slot with the tank bottom surface of second slot is the arcwall face.

As another embodiment of this application, first flange with the junction of sealed lid and/or the second flange with the junction of third flange still has the cladding to have a sealing membrane subassembly, the sealing membrane subassembly includes banding sealing membrane, locates the sealing strip of the long limit department in sealing membrane both sides and locate respectively the thread gluing piece at sealing membrane both ends, the both ends of sealing strip respectively the protrusion in the both ends of sealing membrane, the sealing strip be used for bond in on the sealing membrane.

The air chamber structure provided by the invention has the beneficial effects that: compared with the prior art, the air chamber structure is provided with the two sealing rings at the contact positions of the first flange and the sealing cover respectively, wherein the first sealing ring is provided with the first sealing part and the second sealing part, the first sealing part is abutted and sealed with the side wall of the first sealing groove, the second sealing part is abutted and sealed with the groove bottom of the first sealing groove, the second sealing ring is abutted and sealed with the first sealing part, the whole sealing structure is provided with a plurality of sealing contact nodes, after the air chamber structure is used for a period of time, even if the contact nodes in part are aged, deformed and the like, other sealing nodes can still keep a sealing state, the probability of sealing failure of the plurality of nodes is extremely low, the effectiveness of the sealing structure can be effectively ensured, the service life of the sealing structure is prolonged, the overhaul cost is reduced, and the use safety is improved.

The gas-insulated metal-enclosed switchgear provided by the invention comprises the gas chamber structure.

The gas insulated metal enclosed switchgear provided by the invention has the beneficial effects that: compared with the prior art, the gas chamber structure with better sealing performance is adopted in the gas-insulated metal-enclosed switchgear, so that the safety and reliability of the whole use of the switchgear are improved, the risk of accidents caused by gas leakage of the gas chamber of the switchgear is reduced, and the maintenance cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a plenum structure according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a left side view of the basin insulator of FIG. 1;

FIG. 5 is a schematic structural diagram of a gas chamber structure according to a second embodiment of the present invention;

FIG. 6 is a development view of a sealing membrane module used in the second embodiment of the present invention.

In the figure: 1. a housing; 2. a sealing cover; 3. a basin-type insulator; 301-a conducting portion; 302-an insulator body; 303-a third flange; 304-reinforcing ribs; 4. a first flange; 5. a first seal groove; 6. a first seal ring; 601-a first seal; 6011-a first connector; 6012-a first seal; 602-a second seal; 7. a second seal ring; 701-a second linker; 702-a second seal body; 8. a compression spring coil; 9. a second seal groove; 10. a first connecting projection; 11. a first connecting ring groove; 12. a limiting groove; 13. a second connecting projection; 14. A second connecting ring groove; 15. a second flange; 16-a third seal groove; 17-a third sealing ring; 18-a fourth seal groove; 19-a fourth sealing ring; 20-a first sealing projection; 21-a second sealing projection; 22. a sealing film; 23. A sealing strip; 24. adhesive fastener

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 5, the structure of the air chamber according to the present invention will now be described. The air chamber structure comprises a shell 1, a sealing cover 2 arranged on one side of the shell 1 and provided with an opening, and a basin-type insulator 3 arranged on the other side of the shell 1 and provided with an opening.

One side opening periphery is equipped with the first flange 4 of being connected with sealed lid 2, and sealed 2 medial surface of lid is equipped with first seal groove 5, is equipped with first sealing ring 6 on the first flange 4, and first sealing ring 6 includes the first sealing 601 of one end and first flange 4 rigid coupling and the second sealing 602 of one end and the other end rigid coupling of first sealing 601, and first sealing 601 and second sealing 602 are the contained angle setting.

After the assembly, the other end of the first sealing portion 601 abuts against the side wall of the first sealing groove 5, the other end of the second sealing portion 602 abuts against the bottom of the first sealing groove 5, a second sealing ring 7 with one end fixedly connected with the first sealing groove 5 is arranged in the first sealing groove 5, and the other end of the second sealing ring 7 abuts against the outer side of the first sealing portion 601.

In order to ensure the reliability of the seal, the first seal ring 6 and the second seal ring 7 are elastic members.

Wherein, the first sealing portion 601 and the second sealing portion 602 cooperate to form a "V" shaped groove.

Form first seal space between the lateral wall of first seal groove 5 of first sealing 601, form second seal space between the lateral wall of second sealing 602 and first seal groove 5 and the tank bottom, form third seal space between first sealing 601, second sealing 602 and the second sealing ring 7, multiple seal space can effectively prevent inside gas from revealing, also can play effectual isolation to external steam simultaneously, prevent that the inner chamber that shell 1 formed from receiving the pollution.

Compared with the prior art, the air chamber structure provided by the invention is characterized in that two sealing rings are respectively arranged at the contact positions of the first flange 4 and the sealing cover 2, wherein, the first sealing ring 6 is provided with a first sealing part 601 and a second sealing part 602, the first sealing part 601 is in butt seal with the side wall of the first sealing groove 5, the second sealing part 602 is in butt seal with the groove bottom of the first sealing groove 5, the second sealing ring 7 is in butt seal with the first sealing part 601, the whole sealing structure is provided with a plurality of sealing contact nodes, after being used for a period of time, even if some contact node position wherein appear ageing, warp scheduling problem, other sealed nodes also can keep sealed state, and the probability that the sealed inefficacy appears in multichannel node simultaneously is extremely low, can effectively guarantee seal structure's validity, prolongs seal structure's life, has reduced the cost of overhaul, has improved the security of using.

Specifically, the first sealing ring 6 and the second sealing ring 7 are both rubber members, have certain elasticity and use strength, and have long service life while guaranteeing sealing performance.

Referring to fig. 1, fig. 2 and fig. 5, as a specific embodiment of the air chamber structure provided by the present invention, the first sealing portion 601 includes a first connecting body 6011 fixedly connected to the first flange 4 and a first sealing body 6012 having one end connected to the first connecting body 6011, the other end of the first sealing body 6012 is used to abut against the side wall of the first sealing groove 5, and one end of the second sealing portion 602 is connected to the other end of the first sealing body 6012 and forms an included angle with the first sealing body 6012.

The first connecting body 6011 is fixedly connected with the first flange 4, and the first connecting body and the first flange are detachably connected, so that replacement is facilitated. The other end of the first sealing body 6012 is inclined toward the first sealing groove 5, and the outer edge of the other end abuts against the inner side wall of the first sealing groove 5 to form a sealing contact node. The first sealing portion 601 is simple and reasonable in structure arrangement and plays an effective sealing role.

It should be noted that the first sealing body 6012 and the second sealing portion 602 are both annular sloping plate-shaped members, which occupy a small space and have good elastic deformation capability.

The first sealing body 6012 and the second sealing portion 602 cooperate to form a "V" shaped groove. The first sealing body 6012 and the second sealing portion 602 form a structure similar to a triangle, so that the structural stability is better, the sealing ring can bear higher pressure, the service life of the first sealing ring 6 is prolonged, and the occupied space is small.

The outer edge of the joint of the first sealing body 6012 and the second sealing portion 602 is further provided with a notch, so that the deformation amount of the second sealing portion 602 relative to the first sealing body 6012 is increased, and the elastic compression effect of the first sealing ring 6 is enhanced.

Referring to fig. 1, 2 and 5, as a specific implementation manner of the embodiment of the present invention, a compression spring coil 8 is disposed at a joint of the first sealing body 6012 and the second sealing portion 602.

The pressing spring coil 8 is used to continuously press the other end of the first sealing body 6012 inward, and due to the spatial positions of the first sealing body 6012 and the second sealing portion 602, the other end of the second sealing portion 602 can be continuously pressed, so that the sealing performance is further improved.

Referring to fig. 1, 2 and 5, a second sealing groove 9 opened toward the sealing cover 2 is disposed on the first flange 4, the second sealing groove 9 is an annular groove, a first connecting protrusion 10 is disposed on a side wall of the second sealing groove 9 close to a cavity formed by the housing 1, and a first connecting annular groove 11 for engaging with the first connecting protrusion 10 is disposed on a side wall of the first connecting body 6011.

The first connecting bulge 10 and the first flange 4 are in a clamping connection mode, the structure is simple, the sealing ring is not required to be removed from a sealing groove like a traditional sealing ring, the sealing ring can be directly pulled out manually, the clamping connection structure does not occupy the external space of the first flange 4 basically, and the first connecting body 6011 is subjected to force parallel to the axial direction of the shell 1 and force towards the inner cavity of the shell 1 according to the stress condition of the clamping connection position, so that the first connecting body 6011 is not prone to falling off from the first connecting bulge 10.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 5, an axial cross section of the first connecting protrusion 10 is rectangular.

The first connecting bulge 10 in the shape is simple to process, the first connecting ring groove 11 is also processed into the shape consistent with the first connecting bulge 10, the displacement is not easy to occur after clamping, and the clamping structure is relatively stable.

As a specific implementation manner of the embodiment of the present invention, the cross section of the first connecting protrusion 10 may also be trapezoidal, and the bottom side of the trapezoid is disposed opposite to the inner cavity of the housing 1, which not only facilitates the clamping, but also is not easy to displace after the clamping.

As a specific implementation manner of the embodiment of the present invention, the cross section of the first connecting protrusion 10 may also be hexagonal, which not only facilitates the clamping, but also is not easy to displace after the clamping.

The cross section of the first coupling projection 10 includes, but is not limited to, the above-mentioned shape, preferably, it can be securely snapped.

As a specific implementation manner of the embodiment of the present invention, a glue layer is further disposed on a side wall of the cavity formed by the first connecting body 6011, which is close to the housing 1, so that the first connecting body 6011 is not only in interference fit with the second sealing groove 9, but also bonded by the glue layer, and thus, a good fixing and sealing effect is achieved, and the use stability of the connection position is ensured.

As an embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 5, one end of the first connecting body 6011 abuts against the bottom of the second sealing groove 9.

Above-mentioned structure makes first connector 6011 not only realize being connected with first flange 4 through the joint with first connector protrusion 10, still further realize first connector 6011's further fixed through the butt with second seal groove 9, because first connector 6011 receives the centre gripping of second seal groove 9 tank bottoms and first connector protrusion 10 fixed, first connector 6011 is difficult for taking place deformation in the direction that is on a parallel with shell 1 axial, can prevent effectively that first connector 11 from taking place because of the condition that drops on first connector protrusion 10 that atress deformation leads to.

As an embodiment of the invention, referring to fig. 1, fig. 2 and fig. 5, an end surface of the first connecting body 6011 abutting against the bottom of the second sealing groove 9 is an arc surface.

The arc surface has a guiding effect, clamping assembly is easily completed, meanwhile, a large deformation space is provided, and the structural stability after clamping is improved.

As an embodiment of the invention, referring to fig. 1, fig. 2 and fig. 5, the first sealing groove 5 is a circular groove, the second sealing ring 7 includes a second connector 701 fixedly connected to a bottom of the first sealing groove 5, and a second sealing body 702 having one end connected to the second connector 701, the second sealing body 702 is disposed at an angle with respect to the bottom of the first sealing groove 5, and the other end of the second sealing body 702 abuts against an outer side of the first connector 6011.

The second connector 701 plays a role in being connected and fixed with the sealing cover 2, and the second connector and the sealing cover are detachably connected, so that replacement is convenient. The second sealing body 702 has the other end inclined toward the first connecting body 6011, and the outer edge of the other end abuts against the outer side of the first connecting body 6011 to form a sealing contact node. The second sealing ring 7 is simple and reasonable in structure and plays an effective sealing role.

It should be noted that the second sealing body 702 is an annular sloping plate-shaped member, and has a small occupied space and good elastic deformation capability.

As an embodiment of the invention, referring to fig. 1, fig. 2 and fig. 5, a connection position of the second sealing body 702 and the second connecting body 701 is adjacent to a groove bottom of the first sealing groove 5.

Because the second sealing body 702 is elastically deformed by the extrusion of the first connecting body 6011, the second sealing body 702 has a larger deformation amount under the condition that the root of the second sealing body 702 is close to the groove bottom of the first sealing groove 5, which is beneficial to providing a better elastic sealing effect.

Referring to fig. 2, as a specific implementation manner of the embodiment of the present invention, a limiting groove 12 is disposed on an outer side surface of the first connecting body 6011, and the limiting groove 12 is used to accommodate another end of the second sealing body 702.

The second sealing body 702 is actually abutted against the groove bottom of the limiting groove 12, the limiting groove 12 plays a limiting and guiding role in assembly, and meanwhile, the final assembly position of the second sealing body 702 is limited, so that the second sealing body 702 is prevented from being excessively inclined, and cracking is caused by stress concentration at the joint of the second sealing body 702 and the second connecting body 701.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 5, a second connecting protrusion 13 is disposed on the first sealing groove 5, and a second connecting ring groove 14 snap-fitted with the second connecting protrusion 13 is disposed on the second connecting body 702.

The assembly of the second sealing ring 7 and the sealing cover 2 is realized in a clamping manner, the structure is simple, the sealing ring is not required to be removed from the sealing groove like the traditional sealing ring, the sealing ring can be directly pulled out manually, the second sealing ring 7 is convenient to replace, and the overhauling difficulty is reduced.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 5, the second connecting protrusion 13 is disposed at the bottom of the first sealing groove 5.

Its joint structure does not occupy the exterior space of sealed lid 2 basically, according to the atress condition of joint position, receives the axial of being on a parallel with shell 1, and towards the power of sealed lid 2, still receives the axial power of perpendicular to shell 1 simultaneously for second connector 702 is difficult for coming off from second connection arch 13, and this joint structural layout is reasonable, and simple structure conveniently reduces the maintenance degree of difficulty to the replacement of second sealing ring 7.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 and fig. 4, a second flange 15 is disposed at an opening on the other side of the housing 1, the basin-shaped insulator 3 includes a conduction portion 301, an insulator body 302 disposed at an outer periphery of the conduction portion 301, and a third flange 303 disposed at an outer periphery of the insulator body 302, the third flange 303 is connected to the second flange 15, and reinforcing ribs 304 distributed in a grid shape are disposed on an outer surface of the insulator body 302.

According to the actual use condition, the general basin-type insulator is easy to crack at the position of the insulator, the third flange 303 can be made of metal, and the cracking phenomenon is not easy to occur, so that the cracking of the insulator is one of the reasons for air leakage of the air chamber structure. The grid-shaped reinforcing ribs 304 are arranged on the outer surface of the insulator body 302, so that the structural strength of the insulator body 302 can be effectively enhanced, and the insulator body 302 is prevented from being stressed and cracked to cause air leakage. In the present embodiment, taking the view angle of fig. 1 as an example, the reinforcing rib 304 is disposed on the left side surface of the insulator body 302.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1, fig. 3 and fig. 5, a third sealing groove 16 is disposed on one side of the insulator body 302 facing the second flange 15, a third sealing ring 17 is disposed in the third sealing groove 16, a fourth sealing groove 18 corresponding to the third sealing groove 16 is disposed on the second flange 15, and a fourth sealing ring 19 for abutting against the third sealing ring 17 is disposed in the fourth sealing groove 18; the third sealing ring 17 is provided with a plurality of first sealing bulges 20 which are distributed along the radial direction of the third sealing ring 17 at intervals, a first slot is formed between every two adjacent first sealing bulges 20, the fourth sealing ring 19 is provided with a plurality of second sealing bulges 21 which are distributed along the radial direction of the fourth sealing ring 19 at intervals, a second slot is formed between every two adjacent second sealing bulges 21, the first sealing bulges 20 are inserted into the second slot in an interference mode, and the second sealing bulges 21 are inserted into the first slot in an interference mode.

The contact surfaces of the three sealing rings 17 and the fourth sealing ring 19 are wavy, the contact surfaces are larger, and meanwhile, due to the tortuous arrangement, even if the local contact position deforms to form a gap, other positions still can keep a sealing state, and the situation that sealing failure is caused by deformation of the sealing rings can be effectively avoided.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 3, and fig. 5, the top surfaces of the first sealing protrusion 20 and the second sealing protrusion 21 are both arc-shaped surfaces, and the bottom surfaces of the first slot and the second slot are arc-shaped surfaces.

This configuration maximizes the contact area between the first seal projection 20 and the second seal projection 21 without having a significant stress concentration location, and prevents the seal ring from cracking due to stress concentration.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 5 and fig. 6, a connection portion of the first flange 4 and the sealing cover 2 and/or a connection portion of the second flange 15 and the third flange 303 is further covered with a sealing film assembly, the sealing film assembly includes a strip-shaped sealing film 22, sealing strips 23 disposed at long edges of two sides of the sealing film 22, and hook-and-loop fasteners 24 respectively disposed at two ends of the sealing film 22, two ends of the sealing strips 23 respectively protrude from two ends of the sealing film 22, and the sealing strips 23 are used for adhering to the sealing film 22.

Firstly, when the sealing film 22 with a proper length is selected to be used, the sealing film 22 is firstly wound around a position of a gap which is likely to leak, such as the joint of the first flange 4 and the sealing cover 2 or the joint of the second flange 15 and the third flange 303, and the sealing film 22 can completely cover the gap; then, the two ends of the sealing film 22 are bonded and sealed by using a bonding member 24 (such as a nylon bonding button); finally, the sealing tape 23 is pulled so that the sealing tape 23 is pressed against both long sides of the sealing film 22 and both ends of the sealing tape 23 are stuck to the sealing film 22.

The sealing film 22 in this embodiment can effectively seal the gap under the matching of the sealing strip 23 and the fastening piece 24, and has a simple structure and convenient use.

As a specific implementation manner of the embodiment of the present invention, the sealing film 22 is a plastic film, which has better sealing and covering performance. Sealing strip 23 is the silica gel sealing strip, and the surface is equipped with the adhesive linkage, and the material is soft, can laminate seal membrane 22's external fixation, improves the reliability in utilization.

The invention also provides the gas insulated metal-enclosed switchgear. The gas-insulated metal-enclosed switchgear comprises the gas chamber structure.

According to the gas-insulated metal-enclosed switchgear provided by the invention, by adopting the gas chamber structure with better sealing property, the safety and reliability of the whole use of the switchgear are improved, the risk of accidents caused by gas leakage of the gas chamber of the switchgear is reduced, and the maintenance cost is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (14)

1. The air chamber structure is characterized by comprising a shell, a sealing cover and a basin-type insulator, wherein the sealing cover is arranged at an opening at one side of the shell, and the basin-type insulator is arranged at an opening at the other side of the shell; one side the opening periphery be equipped with the first flange of sealed lid connection, sealed lid medial surface is equipped with first seal groove, be equipped with first sealing ring on the first flange, first sealing ring include one end with the first sealing and one end of first flange rigid coupling with the second sealing of first sealing other end rigid coupling, first sealing with the second sealing is the contained angle setting, the first sealing other end with first seal groove lateral wall butt, the second sealing other end with first seal groove tank bottom butt, be equipped with in the first seal groove one end with the second sealing ring of first seal groove rigid coupling, the second sealing other end with first sealing outside butt, first sealing with the second sealing ring is elastic component.

2. The plenum structure as claimed in claim 1, wherein the first sealing portion includes a first connecting body fixedly connected to the first flange and a first sealing body having one end connected to the first connecting body, the other end of the first sealing body is adapted to abut against a sidewall of the first sealing groove, and one end of the second sealing portion is connected to the other end of the first sealing body and disposed at an angle to the first sealing body.

3. The plenum structure as defined in claim 2, wherein a compression spring coil is provided at a junction of said first sealing body and said second sealing portion.

4. The plenum structure as claimed in claim 2, wherein the first flange is provided with a second sealing groove opened toward the sealing cover, the second sealing groove is an annular groove, a side wall of the second sealing groove close to the cavity formed by the housing is provided with a first connecting protrusion, and a side wall of the first connecting body is provided with a first connecting annular groove for snap-fitting engagement with the first connecting protrusion.

5. The air cell structure as claimed in claim 4, wherein the first coupling projection is rectangular in axial cross section.

6. The plenum structure of claim 4, wherein an end of said first connection body abuts a slot bottom of said second seal slot.

7. The plenum structure as claimed in claim 2, wherein the first sealing groove is a circular groove, the second sealing ring includes a second connector fixedly connected to a bottom of the first sealing groove and a second sealing body having one end connected to the second connector, the second sealing body is disposed at an angle to the bottom of the first sealing groove, and the other end of the second sealing body abuts against an outer side of the first connector.

8. The air chamber structure as claimed in claim 7, wherein a stopper groove for receiving the other end of said second sealing body is provided on an outer side surface of said first connecting body.

9. The air chamber structure as claimed in claim 7, wherein a second connection protrusion is provided on the first sealing groove, and a second connection ring groove snap-fitted with the second connection protrusion is provided on the second connection body.

10. The gas chamber structure as claimed in claim 1, wherein a second flange is provided at an opening at the other side of the housing, the basin-shaped insulator includes a conduction portion, an insulator body provided at the periphery of the conduction portion, and a third flange provided at the periphery of the insulator body, the third flange is connected to the second flange, and reinforcing ribs are provided on the outer surface of the insulator body in a grid-like distribution.

11. The plenum structure as claimed in claim 10, wherein a third sealing groove is formed on a side of the insulator body facing the second flange, a third sealing ring is disposed in the third sealing groove, a fourth sealing groove corresponding to the third sealing groove is formed on the second flange, and a fourth sealing ring for abutting against the third sealing ring is disposed in the fourth sealing groove; the sealing structure is characterized in that a plurality of first sealing bulges are arranged on the third sealing ring and distributed along the radial direction of the third sealing ring at intervals, a first slot is formed between every two adjacent first sealing bulges, a plurality of second sealing bulges are arranged on the fourth sealing ring and distributed along the radial direction of the fourth sealing ring at intervals, a second slot is formed between every two adjacent second sealing bulges, the first sealing bulges are inserted into the second slots in an interference mode, and the second sealing bulges are inserted into the first slots in an interference mode.

12. The plenum structure of claim 11, wherein the top surfaces of the first and second sealing projections are both arcuate surfaces and the slot bottom surfaces of the first and second slots are arcuate surfaces.

13. The air chamber structure as claimed in claim 11, wherein the joint of the first flange and the sealing cover and/or the joint of the second flange and the third flange are further coated with a sealing membrane assembly, the sealing membrane assembly comprises a strip-shaped sealing membrane, sealing strips arranged at the long edges of two sides of the sealing membrane and fastening pieces respectively arranged at two ends of the sealing membrane, two ends of the sealing strips respectively protrude out of two ends of the sealing membrane, and the sealing strips are used for being bonded on the sealing membrane.

14. Gas-insulated metal-enclosed switchgear, characterized in that it comprises a gas cell structure according to claims 1-13.

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