CN214755143U

CN214755143U - GIS and pressure release device thereof

Info

Publication number: CN214755143U
Application number: CN202120291991.9U
Authority: CN
Inventors: 杨立超; 吕寻浩; 张克选; 秦晓宇; 李晓培; 高延峰; 刘彦军; 吕敏; 杨春月; 陈东; 张涛锋; 吕进; 丁鹏翔; 朱科; 左彬; 姜凤华; 张俊鹏
Original assignee: Henan Pingzhi High Voltage Switchgear Co ltd; State Grid Corp of China SGCC; Pinggao Group Co Ltd; Linyi Power Supply Co of State Grid Shandong Electric Power Co Ltd
Current assignee: Henan Pingzhi High Voltage Switchgear Co ltd; State Grid Corp of China SGCC; Pinggao Group Co Ltd; Linyi Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-11-16
Anticipated expiration: 2031-02-02

Abstract

The utility model relates to a GIS and pressure release device thereof, pressure release device includes flange gland and exhaust safety cover, and the flange gland is fixed the rupture disk pressure equipment on the exhaust casing section of GIS air chamber, with shutoff pressure release passageway, the exhaust safety cover can detachably with flange gland fixed mounting, and, in the circumference of the gas outlet in flange gland's exhaust hole, the exhaust safety cover has two at least removable installation positions, the exhaust safety cover is when different removable installation positions, the gas vent of exhaust safety cover is different at gas outlet ascending orientation in week. Therefore, according to the actual conditions when GIS field installation is completed, the exhaust protection cover is assembled by adjusting and selecting a proper detachable installation position, so that the gas outlet of the exhaust protection cover faces to a safe position as far as possible, gas impact on inspection personnel or other equipment is avoided, exhaust harm is reduced, and in addition, the exhaust protection cover can be disassembled and assembled at will, the workload of field disassembly and assembly is small, and the field installation and adjustment are facilitated.

Description

GIS and pressure release device thereof

Technical Field

The utility model relates to a GIS and pressure release thereof.

Background

For GIS, when short circuit fault occurs inside GIS, the temperature of sulfur hexafluoride gas in a gas chamber can be rapidly increased due to large fault current, the gas pressure can be rapidly increased, the design pressure of a tank body of the GIS is constant, when the gas pressure is continuously increased, the danger of explosion of the tank body exists, the safety of GIS switch equipment and peripheral equipment is damaged, and once explosion occurs, immeasurable loss can be brought to a transformer substation.

Based on this, every air chamber at GIS all can set up one set of pressure release, and when certain air chamber broke down, when pressure rose to a definite value (be less than jar body destruction pressure), pressure release can explode release pressure, ensured transformer substation and patrolling and examining personnel's safety. For example, a pressure release device for a GIS is disclosed in the chinese utility model patent with the publication number CN205029238U, which corresponds to an opening on a GIS air chamber housing, and a rupture disk is press-fitted on the opening of the GIS air chamber housing by using a cover plate, and an intermediate through hole corresponding to the opening and the rupture disk is provided on the cover plate. When the pressure in the GIS air chamber rises to a set value, the rupture disk is broken, gas is discharged through the through hole in the cover plate, the pressure is released, and the safety is guaranteed.

Generally, the outlet orientation of the pressure relief device is fixed after the manufacturer has assembled the GIS. However, since the field installation condition is complicated, the outlet direction may change when the GIS is installed, and if the gas outlet of the pressure relief device faces the inspection passage after the GIS is installed, the high-pressure gas discharged may cause damage to the inspection personnel. If the orientation of the air outlet is changed on site, special design needs to be carried out on site, the cost is high, the structure is complex, a GIS air chamber needs to be opened when the air outlet is installed and adjusted on site, and the workload is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure release device of a GIS, which aims to solve the technical problem that the work load for adjusting the direction of a gas outlet is large when the GIS is installed because the direction of the gas outlet of the pressure release device in the prior art is fixed; and simultaneously, the utility model also provides an use above-mentioned pressure relief device's GIS.

In order to achieve the above object, the utility model provides a GIS's pressure release's technical scheme is: a pressure relief device for a GIS, comprising:

the flange gland is used for press-fitting and fixing the rupture disk on an exhaust shell section of the GIS air chamber so as to seal a pressure release channel on the exhaust shell section, and is provided with an exhaust hole which is used for corresponding to the rupture disk so as to normally exhaust after the rupture disk is ruptured;

the exhaust protection cover can be detachably and fixedly assembled with the flange gland;

the exhaust protection cover is provided with an air blocking main cover body and an air blocking side wall, the air blocking main cover body is arranged right opposite to the air outlet of the exhaust hole, the air blocking side wall is positioned on one side of the air blocking main cover body facing the flange gland and arranged around the air outlet along the circumferential direction of the air outlet, and an exhaust port is reserved at the air blocking side wall to guide air to be exhausted;

in the circumference of the air outlet, the exhaust protection cover is provided with at least two detachable mounting positions, and when the exhaust protection cover is at different detachable mounting positions, the orientation of the air outlet in the circumference direction of the air outlet is different.

The beneficial effects are that: the utility model provides an among the pressure release device of GIS, it is equipped with the exhaust safety cover to correspond flange gland detachably fixed, because the exhaust safety cover has two at least removable installation positions on the gas outlet week in exhaust hole, actual conditions when can accomplishing according to the installation of GIS scene, the adjustment is selected suitable removable installation position and is assembled the exhaust safety cover, make the gas outlet of exhaust safety cover as far as possible towards safe position, avoid causing gas shock to patrolling and examining personnel or other equipment, reduce exhaust harm, moreover, because the dismouting at will of exhaust safety cover, on-the-spot dismouting adjustment work volume is less, make things convenient for on-the-spot installation to adjust.

As a further improvement, the exhaust protection cover is detachably and fixedly assembled with the flange gland through fastening bolts, and at least two fastening bolts are uniformly distributed along the circumferential direction of the air outlet at intervals.

The beneficial effects are that: the exhaust protection cover is assembled by the fastening bolts, so that the exhaust protection cover is convenient to process and manufacture and is convenient to assemble and disassemble.

As a further improvement, a support piece is arranged between the exhaust protection cover and the flange gland, one end of the support piece is in pushing fit with the exhaust protection cover, and the other end of the support piece is in pushing fit with the flange gland; fastening bolt is stud, and stud runs through the bolt perforation that is equipped with on exhaust protection cover and the flange gland, stud's one end be used for with screw hole fastening assembly on the exhaust casing section, the other end is equipped with fastening nut soon, and fastening nut compresses tightly the exhaust protection cover to can all fix exhaust protection cover and flange gland through stud on the GIS air chamber.

The beneficial effects are that: the double-end stud is adopted to realize fixed assembly, when the exhaust protection cover is assembled and disassembled, the double-end stud does not need to be disassembled, and only the fastening nut needs to be rotated, so that the assembly, disassembly and adjustment on site are facilitated.

As a further improvement, the supporting piece is a supporting sleeve, and each stud is sleeved with one supporting sleeve.

The beneficial effects are that: the supporting piece adopts the supporting sleeve, so that supporting and pushing can be guaranteed, and meanwhile, the supporting piece is convenient to position and install.

As a further improvement, the fastening bolts are arranged in three or more numbers, each fastening bolt being located at a vertex position of an equilateral polygon arranged around the air outlet.

The beneficial effects are that: fastening bolts are arranged in an equilateral polygon manner, so that the detachable installation position of the exhaust protection cover is conveniently designed.

As a further improvement, the air blocking main cover body is rectangular, and the air blocking side wall of the exhaust protection cover is formed by side wall turning edges arranged on the corresponding side edges of the air blocking main cover body.

The beneficial effects are that: the air blocking main cover body is rectangular, and the side wall turning edges of the air blocking main cover body form corresponding exhaust protection covers, so that the air blocking main cover body is convenient to machine and manufacture.

As a further improvement, the side wall is turned over and arranged along three sides of the corresponding air blocking main cover body so as to form the air outlet at the rest one side.

As a further improvement, the flange cover has an outer side surface facing the exhaust protection cover, and the side wall turnup is located outside the flange cover and extends a set length toward the flange cover so as to pass over the outer side surface.

The beneficial effects are that: the side wall turning edge crosses the outer side surface of the flange gland, so that the air blocking effect of the air blocking side wall is conveniently improved.

As a further improvement, a dustproof cover is arranged at the air outlet of the exhaust hole, the dustproof cover is stopped and limited by a hole check ring arranged in the exhaust hole, and the dustproof cover is positioned on one side, facing the exhaust protection cover, of the hole check ring.

The beneficial effects are that: the arrangement position of the dustproof cover is conveniently blocked by the hole check ring, and the dustproof cover is convenient to install.

The utility model provides a GIS's technical scheme is: a GIS, comprising:

the GIS air chamber is provided with an exhaust shell section, a pressure release channel is arranged in the exhaust shell section, and the pressure release channel is communicated with an inner cavity of the GIS air chamber;

the pressure release device comprises a flange gland and an exhaust protection cover;

the flange gland presses the rupture disk on the exhaust shell section to plug the pressure release channel; the flange gland is provided with an exhaust hole which is used for corresponding to the rupture disk so as to normally exhaust after the rupture disk is ruptured;

The beneficial effects are that: the utility model provides an among the GIS, the fixed exhaust safety cover that is equipped with on pressure release's the flange gland detachablely, because the exhaust safety cover has two at least removable installation positions on the gas outlet week in exhaust hole, actual conditions when can accomplishing according to the field installation of GIS like this, the adjustment is selected suitable removable installation position and is assembled the exhaust safety cover, make the gas outlet of exhaust safety cover as far as possible towards safe position, avoid causing the gas shock to patrolling and examining personnel or other equipment, reduce exhaust harm, moreover, because the dismouting at will of exhaust safety cover, on-the-spot dismouting adjustment work volume is less, make things convenient for the on-the-spot installation to adjust.

Drawings

Fig. 1 is a schematic view of a local structure of a GIS provided by the present invention;

FIG. 2 is a schematic view of the pressure relief device of FIG. 1 (shown with solid arrows indicating the direction of gas venting);

FIG. 3 is a schematic view of the exhaust shield of FIG. 2;

FIG. 4 is a top view of the vented shield of FIG. 3.

Description of reference numerals:

1. a GIS gas chamber; 2. an exhaust housing section; 3. a flange gland; 31. an upper side surface; 32. an exhaust hole; 33. an air outlet; 4. an exhaust protection cover; 41. a main air blocking cover body; 42. a gas-blocking side wall; 43. an exhaust port; 44. perforating an upper bolt; 5. a stud; 6. fastening a nut; 7. a support sleeve; 8. a rupture disk; 9. a spring washer; 10. a retainer ring for a bore; 11. and a dust cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, 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 for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model provides a GIS's embodiment 1:

as shown in fig. 1 to 4, the GIS in this embodiment includes a GIS gas chamber 1, the GIS gas chamber 1 includes a main housing, the main housing forms an inner cavity of the GIS gas chamber 1 for containing sulfur hexafluoride gas, a flange is fixedly disposed on the main housing, and the flange can form a pressure release channel as an exhaust housing section 2, generally, the pressure release channel is sealed by a rupture disk 8, so as to ensure the sealing performance of the GIS gas chamber 1, when the pressure of the sulfur hexafluoride gas in the GIS gas chamber 1 rises, the high-pressure gas breaks the rupture disk 8, and is discharged through the pressure release channel on the exhaust housing section 2, thereby avoiding an explosion accident of the GIS gas chamber 1.

The exhaust casing section 2 is externally provided with a pressure release device, the pressure release device mainly comprises a flange gland 3 and an exhaust protection cover 4 on the whole, the flange gland 3 presses and fixes the rupture disk 8 on the exhaust casing section 2, so that the rupture disk 8 blocks the pressure release channel.

In the embodiment, a flange gland 3 and an exhaust protection cover 4 are fixedly arranged on an exhaust casing section 2 through a stud 5, the stud 5 plays a role of fastening a bolt, the exhaust protection cover 4 and the exhaust casing section 2 are positioned at two sides of the flange gland 3, a threaded hole is arranged at the corresponding end part of the exhaust casing section 2, bolt through holes which are correspondingly communicated are arranged on the exhaust protection cover 4 and the flange gland 3, the stud 5 correspondingly penetrates through the bolt through holes, a support sleeve 7 is sleeved on the stud 5, one end of the support sleeve 7 is in push fit with the exhaust protection cover 4, the other end of the support sleeve 7 is in push fit with the flange gland 3, one end of the stud 5 and the threaded hole on the exhaust casing section 2 can be fastened and assembled firstly, then the flange gland 3 is sleeved on the stud 5, a spring washer 9 and the support sleeve 7 are sequentially sleeved on the stud 5, and then the climbing protection cover is arranged on the stud 5 in a penetrating way, the spring washer 9 and the fastening nut 6 are sleeved, and the fastening nut 6 is screwed on the stud 5, so that the exhaust protection cover 4 and the flange gland 3 can be effectively fixed on the exhaust shell section 2 by utilizing the stud 5. And the exhaust protection cover 4 can be detachably fixedly assembled with the flange gland 3 through the stud 5.

In fact, the exhaust housing section 2 is provided with a recessed step, during assembly, the rupture disk 8 is placed at the recessed step, the flange gland 3 is pressed and mounted at the outer end of the exhaust housing section 2, and the corresponding protrusion on the flange gland 3 presses and mounts the rupture disk 8 on the exhaust housing section 2. So that the rupture disk 8 blocks the pressure relief channel on the exhaust housing section 2.

The vent hole 32 is provided on the flange cover 3 corresponding to the rupture disk 8 to enable normal venting after the rupture disk 8 is ruptured. And, there is also dust cap 11 at the outlet 33 of the exhaust vent 32, the dust cap 11 here is stopped and limited by the hole check ring 10 equipped in the exhaust vent 32, can set up the mounting neck at the outlet 33 of the exhaust vent 32 in advance, fit the hole check ring 10 into the exhaust vent 32 correspondingly, and then pack the dust cap 11 into the exhaust vent 32, the dust cap 11 here is located on one side towards the exhaust protective cover 4 of the hole check ring 10. Generally, the dust cover 11 is lightweight and may be a fragile member.

In this embodiment, exhaust protection cover 4 is the rectangle structure on the whole, and exhaust protection cover 4 is including keeping off gas main cover body 41 and keeping off gas side wall 42, and the main cover body 41 that keeps off gas of here is the rectangle cover body, and just right the gas outlet 33 of exhaust hole 32 arranges, keeps off gas side wall 42 and is located the orientation that keeps off gas main cover body 41 one side of flange gland 3 to the circumference of the gas outlet 33 along exhaust hole 32 centers on gas outlet 33 arranges, keep off gas side wall 42 department and reserve gas vent 43 to guide gas outgoing. In fact, in the present embodiment, the air baffle side panel 42 is formed by side panel turned edges provided at the respective sides of the air baffle main cover body 41, specifically, the air baffle side panel 42 is formed by side panel turned edges arranged corresponding to three sides of the exhaust protection cover 4, and the exhaust port 43 is formed at the remaining one side to guide the gas exhaust direction.

In addition, the flange cover 3 has an outer side surface facing the exhaust protection cover 4, and the side wall turned edge is located outside the flange cover 3 and extends a set length toward the flange cover 3 to cross the outer side surface, so that the side wall turned edge forms an effective barrier.

In fact, four upper bolt through holes 44 are provided on the rectangular main air blocking cover body 41, the four upper bolt through holes 44 are uniformly distributed along the circumferential direction of the air outlet 33 of the exhaust hole 32 of the flange gland 3 at intervals, that is, two adjacent upper bolt through holes 44 are spaced by 90 degrees, four studs 5 are required to be arranged in central symmetry to realize fastening assembly, the four studs 5 are located at four vertex positions of an equilateral quadrangle arranged around the air outlet 33, so that, in the circumferential direction of the air outlet 33, the exhaust protection cover 4 has four detachable mounting positions, when the exhaust protection cover 4 is at different detachable mounting positions, the orientation of the air outlet 43 in the circumferential direction of the air outlet 33 is completely different, when replacing, the exhaust protection cover 4 can be detached from the studs 5 only by detaching the four fastening nuts 6 and the corresponding spring washers 9, and after rotational adjustment, the exhaust protection cover 4 is reassembled on the studs 5, and then the fastening nut 6 and the spring washer 9 are assembled on the stud 5, so that the field adjustment and installation are both convenient.

In the pressure release device that this embodiment provided, utilize stud as fastening bolt can be with removable fixed mounting of exhaust safety cover on the flange closing cap to, the exhaust safety cover has four mounted positions in the gas outlet circumferencial direction, so, when transporting GIS to the scene, if the pre-installation position is improper to result in the gas vent to patrol and examine the passageway, can be through selecting other removable mounted positions, the rotation of circumference exhaust safety cover adjusts the gas vent and patrols and examines the passageway towards safe direction, neither towards patrolling and examining the passageway nor towards other equipment. In addition, during adjustment, only the fastening nut needs to be unscrewed, the whole stud and the flange gland do not need to be disassembled, and a GIS air chamber which is subjected to inflation operation does not need to be opened, so that the field operation amount is reduced.

The utility model provides a GIS's embodiment 2:

the difference from example 1 is mainly that: in example 1, only one vent was provided at the air baffle side of the vent shield, and the vent shield had four removable mounting locations. In this embodiment, the exhaust protection cover is circular structure, and its fender gas side wall department is equipped with two symmetrical arrangement's gas vent, and at this moment, the exhaust protection cover still adopts four stud and flange gland, exhaust casing section fixed mounting time, and the exhaust protection cover has two removable installation positions.

Of course, in other embodiments, the exhaust shield may have three removable mounting locations circumferentially about the air outlet such that the exhaust ports are oriented in different positions if the studs are arranged in an equilateral triangle. Of course, a greater number of studs can be selected for assembly according to actual needs to increase the number of detachable mounting positions, and the number and positions of the fastening bolts can be arranged in an equilateral polygon manner, i.e., the number of detachable mounting positions can be adjusted and maintained.

The utility model provides a GIS's embodiment 3:

the difference from example 1 is mainly that: in example 1, four studs are arranged to form four removable mounting locations. In this embodiment, two studs are correspondingly arranged to form two detachable mounting positions.

The utility model provides a GIS's embodiment 4:

the difference from example 1 is mainly that: in embodiment 1, the fastening bolt adopts the stud, so that the exhaust protection cover is convenient to assemble, disassemble and adjust, and meanwhile, the exhaust protection cover and the flange gland can be fixed and assembled simultaneously only by using the stud, so that the number of parts required for fixing is small. In this embodiment, the first fastening screws are used to detachably fix the flange cover and the exhaust casing section, and the second fastening screws are used to detachably fix the exhaust protection cover on the flange cover, at this time, the support pressing block can be used as the support member to be arranged between the flange cover and the exhaust protection cover, and the number of the second fastening screws can be referred to the number and the position arrangement of the studs in any embodiment 1 of GIS embodiments 1 to 3, which is not described herein again.

The utility model provides a GIS's embodiment 5:

the difference from example 1 is mainly that: in embodiment 1, spring washers are provided between the fastening nut and the exhaust protection cover and between the support sleeve and the flange cover, respectively. In this embodiment, the spring washer may be provided only between the clamping nut and the venting cover, the latter only between the support sleeve and the flange gland, or it may be omitted.

The utility model provides a GIS's embodiment 6:

the difference from example 1 is mainly that: in embodiment 1, the exhaust protection cover is detachably fixedly fitted to the flange cover by fastening bolts. In this embodiment, the gas main cover body that keeps off of exhaust safety cover is circular structure, be equipped with the annular flange on the flange gland, keep off the gas side wall and go up to have two or more outer jacks along circumference interval equipartition, also correspond on the annular flange and be equipped with two or more interior jacks, gas outlet circumference interval equipartition is also followed to two or more interior jacks, and so, position through the circumferential direction exhaust safety cover, the corresponding relation of hole and interior jack in the adjustment, can confirm the removable installation position in the difference with the exhaust safety cover, thereby make the gas outlet towards different positions, wear to adorn the fastening pin again, in order to fix the exhaust safety cover, prevent to fly away from GIS.

The utility model provides a GIS's pressure release's embodiment:

the structure of the pressure release device in this embodiment is the same as that of the pressure release device in GIS embodiment 1 described above, and will not be described again here.

Of course, in other embodiments, the structure of the pressure release device in any one of the GIS embodiments 2 to 6 may also be adopted, and will not be described herein again.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made without inventive effort to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure relief device for a GIS, comprising:

the flange gland (3) is used for press-fitting and fixing the rupture disk (8) on the exhaust shell section (2) of the GIS air chamber (1) so as to seal a pressure release channel on the exhaust shell section (2), the flange gland (3) is provided with an exhaust hole (32), and the exhaust hole (32) is used for corresponding to the rupture disk (8) so as to normally exhaust after the rupture disk (8) is ruptured;

the flange gland is characterized by further comprising an exhaust protection cover (4), wherein the exhaust protection cover (4) can be detachably and fixedly assembled with the flange gland (3);

the exhaust protection cover (4) is provided with an air blocking main cover body (41) and an air blocking side wall (42), the air blocking main cover body (41) is arranged right opposite to the air outlet (33) of the exhaust hole (32), the air blocking side wall (42) is positioned on one side, facing the flange gland (3), of the air blocking main cover body (41) and arranged around the air outlet (33) along the circumferential direction of the air outlet (33), and an exhaust port (43) is reserved at the air blocking side wall (42) to guide air to be exhausted;

in the circumferential direction of the air outlet (33), the exhaust protection cover (4) is provided with at least two detachable installation positions, and when the exhaust protection cover (4) is at different detachable installation positions, the orientation of the air outlet (43) in the circumferential direction of the air outlet (33) is different.

2. The pressure relief device of the GIS according to claim 1, wherein the exhaust protection cover (4) is detachably fixed and assembled with the flange cover (3) by fastening bolts, and at least two fastening bolts are arranged at intervals along the circumferential direction of the air outlet (33).

3. The pressure relief device of the GIS according to claim 2, wherein a support member is provided between the venting protection cover (4) and the flange gland (3), one end of the support member is in pushing fit with the venting protection cover (4), and the other end is in pushing fit with the flange gland (3); fastening bolt is stud (5), and stud (5) run through the bolt perforation that is equipped with on exhaust protection cover (4) and flange gland (3), the one end of stud (5) be used for with screw hole fastening assembly on exhaust casing section (2), other end are equipped with fastening nut (6) soon, and fastening nut (6) compress tightly exhaust protection cover (4) to can all fix exhaust protection cover (4) and flange gland (3) through stud (5) on GIS air chamber (1).

4. The pressure relief device of the GIS according to claim 3, wherein the support member is a support sleeve (7), and each stud (5) is sleeved with one support sleeve (7).

5. The pressure relief device of GIS according to claim 2, characterized in that said fastening bolts are arranged in more than three, each at the position of a vertex of an equilateral polygon arranged around said air outlet (33).

6. The GIS pressure relief device according to any of claims 2 to 5, wherein the main air baffle cover (41) is rectangular and the air baffle side (42) of the exhaust protection cover (4) is formed by side flaps provided on the corresponding sides of the main air baffle cover (41).

7. The GIS pressure relief device according to claim 6, wherein said side flaps are arranged along three sides of the corresponding air blocking main housing (41) to form said air outlet (43) at the remaining one side.

8. The GIS pressure relief device according to claim 6, wherein the flange cover (3) has an outer side facing the venting boot (4), and the side gusset is located outside the flange cover (3) and extends a set length toward the flange cover (3) to pass over the outer side.

9. The pressure relief device of the GIS according to any one of claims 1 to 5, wherein a dust cap (11) is disposed at the gas outlet (33) of the gas outlet (32), the dust cap (11) is stopped and limited by a hole check ring (10) disposed in the gas outlet (32), and the dust cap (11) is located on a side of the hole check ring (10) facing the gas exhaust protection cover (4).

10. A GIS, comprising:

the GIS air chamber (1) is provided with an exhaust shell section (2), a pressure release channel is arranged in the exhaust shell section (2), and the pressure release channel is communicated with an inner cavity of the GIS air chamber (1);

the pressure release device presses the rupture disk (8) on the exhaust shell section (2) to seal the pressure release channel;

characterized in that the pressure relief device adopts the pressure relief device of the GIS of any one of claims 1 to 9.