CN110145047B

CN110145047B - Firewall plugging structure of transformer substation

Info

Publication number: CN110145047B
Application number: CN201910440187.XA
Authority: CN
Inventors: 朱辉; 蒋亚强; 张泽江; 赵长征
Original assignee: Sichuan Fire Research Institute of Emergency Management Department
Current assignee: Sichuan Fire Research Institute of Emergency Management Department
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2024-01-16
Anticipated expiration: 2039-05-24
Also published as: CN110145047A

Abstract

The invention discloses a transformer substation firewall plugging structure, which solves the problems of unsatisfactory electromagnetic isolation effect, fireproof and explosion-proof effect and sealing performance of a firewall plugging structure in a valve hall of a converter station in the prior art. The invention provides a wall penetrating hole for installing a blocking structure in a firewall in a power station valve hall, wherein the blocking structure comprises a large blocking structure and a small blocking structure; the large plugging structure comprises a frame body, a fireproof wall body and a small plugging structure mounting hole, and the small plugging structure comprises a steel frame body, a fireproof and explosion-proof plate, a converter transformer sleeve mounting hole and an aluminum silicate needled blanket layer. The fireproof and explosion-proof performance of the fire wall plugging structure of the valve hall of the converter station is strong, the electromagnetic isolation effect is good, the sealing performance of each joint is good, the fireproof and explosion-proof performance of the fireproof and explosion-proof plate for installing the valve hall converter transformer bushing of the power station is strong, the electromagnetic isolation effect is good, the connection between the fireproof and explosion-proof plate and the fire wall is stable and firm, and the sealing performance of the joint gap is good.

Description

Firewall plugging structure of transformer substation

Technical Field

The invention relates to a firewall plugging structure of a transformer substation.

Background

The power station valve hall is a closed building for placing a converter valve, and excellent electromagnetic shielding performance is required. The electromagnetic interference that shielding conversion produced, the wall floor has all laid non-magnetic corrosion resistant plate, and the wall installation is worn to the design of converter transformer sleeve pipe, consequently need set up the wall hole on the wall of power station valve room, set up the wall hole and need seal the wall hole mouth after installing the converter transformer sleeve pipe, prior art when carrying out the wall hole mouth and seal, its sealing efficiency is low, seals back shutoff department electromagnetic isolation effect, fire prevention explosion-proof effect, and sealing performance all are not ideal.

Therefore, the transformer substation firewall plugging structure is designed to improve the fireproof and explosion-proof performance, the electromagnetic isolation effect and the sealing performance of the joint, and the transformer substation firewall plugging structure becomes a technical problem to be solved by a person skilled in the art.

Disclosure of Invention

The invention aims to solve the technical problems that: the utility model provides a transformer substation prevents wall plugging structure solves the electromagnetism isolation effect, fire prevention explosion-proof effect and the problem that sealing performance is all not ideal of prior art converter station valve hall prevents wall plugging structure.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

a fire wall plugging structure of a transformer substation is provided with a square through-wall hole on a fire wall of a valve hall of a power station, the plugging structure is arranged in the through-wall hole and comprises a large plugging structure and a small plugging structure which is arranged in the large plugging structure and is used for installing a converter transformer bushing;

the large plugging structure comprises a frame body formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and installed in the wall penetrating hole, and a fireproof wall body installed in the frame body and formed by inserting a plurality of ALC plates side by side through rabbets, wherein the frame body is cross-shaped, four square-shaped installation cavities are formed between the frame body and the wall of the wall penetrating hole, each installation cavity is internally provided with the fireproof wall body, and the frame body is connected with the wall of the wall penetrating hole through expansion bolts or chemical bolts;

Two fireproof walls which are distributed side by side are respectively provided with a small plugging structure mounting hole for mounting the small plugging structure, each small plugging structure mounting hole is internally provided with one small plugging structure, and each small plugging structure comprises a steel frame body which is formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and is arranged in the small plugging structure mounting hole and takes a shape of a mouth, and a fireproof and explosion-proof plate which is arranged in the steel frame body and takes a shape of a square;

the fireproof and explosion-proof plate is characterized in that a converter transformer sleeve mounting hole matched with the converter transformer sleeve is formed in the center of the fireproof and explosion-proof plate, the converter transformer sleeve mounting holes are distributed in an inclined mode, the inclination of the converter transformer sleeve mounting holes is consistent with that of the converter transformer sleeve, the converter transformer sleeve is mounted in the converter transformer sleeve mounting hole, and a layer of aluminum silicate needled blanket layer formed by an aluminum silicate needled blanket is filled between the hole wall of the converter transformer sleeve mounting hole and the outer tube wall of the converter transformer sleeve.

Further, the length of the ALC plates forming the fireproof wall body is 3200mm, the width of the ALC plates forming the fireproof wall body is 600mm, the thickness of the ALC plates forming the fireproof wall body is 200mm, two adjacent ALC plates forming the fireproof wall body in the same square-shaped mounting cavity are spliced through a tongue-and-groove, all the ALC plates forming the fireproof wall body in the same square-shaped mounting cavity are spliced into the fireproof wall body in sequence through the tongue-and-groove, and each square-shaped mounting cavity is internally provided with one fireproof wall body;

A plurality of non-magnetic stainless steel fixed pressing plates which are Z-shaped are fixed on the fireproof wall body through M12 bolts, a clamping groove is formed between each non-magnetic stainless steel fixed pressing plate and the fireproof wall body, all the non-magnetic stainless steel fixed pressing plates are distributed around the small plugging structure mounting holes in a circle, more than two first equal angle steels of L100x10 are equidistantly welded on the outer annular surface of the steel frame body, all the first equal angle steels are distributed around the outer annular surface of the steel frame body in a circle, the number of the first equal angle steels is the same as the number of the clamping grooves and corresponds to one another, all the clamping grooves are positioned on the inner side of a valve hall of a power station valve hall, and the first equal angle steels are clamped in the corresponding clamping grooves and are fastened through the M12 bolts;

the center of the fireproof explosion-proof plate is provided with a converter transformer sleeve mounting hole for mounting a converter transformer sleeve, the fireproof explosion-proof plate comprises a first metal surface structure rock wool composite plate, a second metal surface structure rock wool composite plate and a non-magnetic conductive stainless steel impact-resistant plate which are sequentially laminated from the inner side of a valve hall to the converter transformer side, the converter transformer sleeve mounting hole sequentially penetrates through the first metal surface structure rock wool composite plate, the second metal surface structure rock wool composite plate and the non-magnetic conductive stainless steel impact-resistant plate, and the aluminum silicate needled blanket layer is positioned between the hole wall of the converter transformer sleeve mounting hole part formed by the first metal surface structure rock wool composite plate and the second metal surface structure rock wool composite plate and the outer wall of the converter transformer sleeve;

The inner ring surface of the steel frame body is equidistantly welded with more than two second equilateral angle steels L50x6, all the second equilateral angle steels are distributed around the inner ring surface of the steel frame body, and the rock wool composite board with the first metal surface structure is respectively fixed with each second equilateral angle steel through bolts; the inner ring surface of the steel frame body is equidistantly welded with more than two third equilateral angle steels L100x10, all the third equilateral angle steels are distributed around the inner ring surface of the steel frame body, and the rock wool composite board with the second metal surface structure is respectively fixed with each third equilateral angle steel through bolts; the steel frame body is equidistantly welded with a circle of clamping plates made of austenitic S304 nonmagnetic stainless steel on the side surface of the converter transformer side, a non-magnetic conductive stainless steel impact-resistant plate clamping groove is formed between each third equilateral angle steel and each clamping plate, the peripheries of the non-magnetic conductive stainless steel impact-resistant plates are respectively fastened and clamped in all the non-magnetic conductive stainless steel impact-resistant plate clamping grooves, and the second equilateral angle steel, the third equilateral angle steel and the non-magnetic conductive stainless steel impact-resistant plate clamping grooves are sequentially distributed side by side from the inner side of the valve hall to the converter transformer side.

Further, a gap is reserved between the outer pipe wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting hole part formed by the non-magnetic conductive stainless steel impact-resistant plate;

a first ceramic silicon rubber sealing sleeve formed by ceramic silicon rubber is arranged between the outer pipe wall of the converter transformer sleeve and the outer surface of the rock wool composite board with the first metal surface structure, a first stainless steel clamp is arranged on the first ceramic silicon rubber sealing sleeve, the first ceramic silicon rubber sealing sleeve is fixed with the outer pipe wall of the converter transformer sleeve through the first stainless steel clamp, and the first ceramic silicon rubber sealing sleeve is fixed on the outer surface of the rock wool composite board with the first metal surface structure through bolts;

the outer tube wall of the converter transformer sleeve and the outer surface of the rock wool composite board with the second metal surface structure are provided with a layer of second ceramic silicon rubber sealing sleeve formed by ceramic silicon rubber, a second stainless steel clamp is arranged on the second ceramic silicon rubber sealing sleeve, the second ceramic silicon rubber sealing sleeve is fixed with the outer tube wall of the converter transformer sleeve through the second stainless steel clamp, the second ceramic silicon rubber sealing sleeve is fixed on the outer surface of the rock wool composite board with the second metal surface structure through bolts, and a second ceramic silicon rubber sealing sleeve part fixed on the rock wool composite board with the second metal surface structure is positioned between the rock wool composite board with the second metal surface structure and the non-magnetic conductive stainless steel impact-resistant plate.

Further, a first fireproof protection layer consisting of an ALC plate with the thickness of 50mm is fixed on the front side and the back side of the steel frame body through bolts respectively, a first color steel plate made of an S304 nonmagnetic stainless steel plate with the thickness of 1mm is coated at the joint of the first fireproof protection layer and the nonmagnetic stainless steel impact plate on the converter side, the first color steel plate is fixed with the first fireproof protection layer and the nonmagnetic stainless steel impact plate through bolts respectively, a filling structure formed by aluminum silicate needled blanket is filled at the joint of the fireproof wall body, the first fireproof protection layer and the steel frame body, and a fireproof mortar layer is filled on the outer surface of the filling structure between the first fireproof protection layer and the fireproof wall body on the converter side; the fire-proof wall is characterized in that a flexible water-proof putty layer with the thickness of 2mm is coated on one side face of the converter transformer side in a scraping mode, and an air-entrained leveling mortar layer with the thickness of 8mm is coated on the outer surface of the flexible water-proof putty layer in a scraping mode.

Further, the length, width and thickness of the rock wool composite board with the first metal surface structure are 3100mm multiplied by 3000mm multiplied by 50mm respectively, the length, width and thickness of the rock wool composite board with the second metal surface structure are 3100mm multiplied by 3000mm multiplied by 150mm respectively, and the length, width and thickness of the non-magnetic conductive stainless steel impact-resistant board are 3100mm multiplied by 3000mm multiplied by 70mm respectively;

The rock wool composite board with the first metal surface structure is formed by splicing three rock wool composite boards with metal surface structures with the specifications of 1200mm multiplied by 3000mm multiplied by 50mm, 1200mm multiplied by 3000mm multiplied by 50mm and 700mm multiplied by 3000mm multiplied by 50mm side by side through rabbets, and fireproof heat-insulating mortar structures are formed by jointing all jointing gaps; the second metal surface structure rock wool composite board is formed by splicing three metal surface structure rock wool composite boards with the specification of 1200mm multiplied by 3000mm multiplied by 150mm, 1200mm multiplied by 3000mm multiplied by 150mm and 700mm multiplied by 3000mm multiplied by 150mm side by side through rabbets, and all splicing gaps are in a pointing joint with a fireproof heat insulation mortar structure; the rock wool composite board with the metal surface structure comprises a rock wool composite board and a non-magnetic-conductive 304 stainless steel surface layer tightly coated on the outer surface of the rock wool composite board, wherein the thickness of the non-magnetic-conductive 304 stainless steel surface layer is 0.6mm.

Further, gaps are reserved between the first metal surface structure rock wool composite board and the second metal surface structure rock wool composite board and between the second metal surface structure rock wool composite board and the non-magnetic conductive stainless steel impact-resistant board, the gap between the first metal surface structure rock wool composite board and the second metal surface structure rock wool composite board is 10mm, and the gap between the second metal surface structure rock wool composite board and the non-magnetic conductive stainless steel impact-resistant board is 20mm.

Further, be fixed with the round around the fire wall body through M12 bolt circumference and be the fixed clamp plate of first no magnetism stainless steel of zigzag, first no magnetism stainless steel fixed clamp plate with be formed with first joint groove between the fire wall body, be fixed with round L50x 6's fourth equilateral angle steel on the wall of wearing the wall entrance through expansion bolts or chemical bolt circumference equidistance respectively, the equidistant welding has more than two L100x 10's fifth equilateral angle steel on each lateral wall of the frame body respectively, same one fire wall body is last to be distributed in wearing the wall entrance to the wall side first joint groove is used for the joint fourth equilateral angle steel, the same one fire wall body is last to be distributed in the frame body side first joint groove is used for the joint fifth equilateral angle steel, the fire wall body is through first joint groove joint fourth equilateral angle steel with the wall of wearing the wall entrance is fixed mutually, the same fire wall body passes through first joint groove the fifth equilateral angle steel is fixed with the fire wall body.

Further, two sides of the connection part of the fireproof wall body and the wall of the through-wall hole are respectively coated with a first aluminum silicate needled blanket layer formed by aluminum silicate needled blankets, the outer surface of the first aluminum silicate needled blanket layer is coated with a second color steel plate made of an austenitic S304 nonmagnetic stainless steel plate with the thickness of 1mm, and the second color steel plate is respectively fixed with the fireproof wall body and the firewall of the power station valve hall through bolts; and gaps formed between the first aluminum silicate needled blanket layer, the second color steel plate, the fireproof wall body and the wall of the through-wall hole are filled with fireproof paint mortar.

Further, the filling structure compactly fills gaps among the fireproof wall body, the first fireproof protection layer and the steel frame body; the front and back sides of the frame body are respectively fixed with a second fireproof protection layer consisting of 50 mm-thick ALC plates through bolts, and the connection parts of the fireproof wall body and the frame body and the second fireproof protection layer are respectively coated with a second aluminum silicate needled blanket layer formed by aluminum silicate needled blankets.

Further, the fire protection wall body is coated with a 304 stainless steel shielding layer with the thickness of 0.6mm on the outer surface positioned on the inner side of the valve hall, the outer surface coated on the steel frame body and positioned on the outer surface of the first fireproof protection layer positioned on the inner side of the valve hall and the outer surface coated on the frame body and positioned on the outer surface of the second fireproof protection layer positioned on the inner side of the valve hall; the fire wall body is uniformly provided with a plurality of C80×40X20X2.5 purlins on the outer surface positioned on the inner side of the valve hall, and the 304 stainless steel shielding layer is fixedly connected with all the purlins through bolts respectively;

all the first equilateral angle steel, all the second equilateral angle steel, all the third equilateral angle steel, all the fourth equilateral angle steel, all the fifth equilateral angle steel, all the M12 bolts, all the expansion bolts or the chemical bolts, all the purlins and all the bolts are all made of austenitic S304 nonmagnetic stainless steel, all the nonmagnetic stainless steel fixed pressing plates and the first nonmagnetic stainless steel fixed pressing plates are all made of 5mm thick austenitic S304 nonmagnetic stainless steel plates, the steel bars in all the ALC plates are HRB400S hot rolled threaded austenitic S304 nonmagnetic stainless steel bars, the first stainless steel clamp and the second stainless steel clamp are all made of austenitic S304 nonmagnetic stainless steel, and are used for fixing the head of the first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve, and the-20X 4 aluminum alloy pressing ring is arranged on the bolts of the first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve in a penetrating way.

Compared with the prior art, the invention has the following beneficial effects:

the fireproof and explosion-proof plate is simple in structure, scientific and reasonable in design, convenient to use, strong in fireproof and explosion-proof performance, good in electromagnetic isolation effect, good in sealing performance of all joints, strong in fireproof and explosion-proof performance of the fireproof and explosion-proof plate for installing the converter transformer bushing of the power station valve hall, good in electromagnetic isolation effect, stable and firm in connection between the fireproof and explosion-proof plate and the firewall, and good in sealing performance of a joint gap.

According to the invention, a wall through hole is formed into a square shape, a cross-shaped frame body is arranged in the square hole, the frame body is formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes, the square hole is divided into four square mounting cavities by the frame body, ALC plates with the length of 3200mm, the width of 600mm and the thickness of 200mm are arranged in the square mounting cavities side by side, a fireproof wall body is spliced between the ALC plates in the same square mounting cavity by adopting a tongue-and-groove, the splicing efficiency of the fireproof wall body is high, the fireproof wall body is fixedly connected with the hole wall and the side wall of the frame body by adopting angle steel and nonmagnetic stainless steel fixed pressing plates, clamping grooves are formed between the nonmagnetic stainless steel fixed pressing plates and the ALC plates through M12 bolts, the equilateral angle steel fixed on the hole wall and the side wall of the frame body are respectively clamped with the clamping grooves, the fireproof wall body can be quickly mounted in the square mounting cavities through M12 bolts, and after the fireproof wall body is mounted, the fireproof wall body is firm and has good fireproof performance.

According to the invention, the aluminum silicate needled blanket layers are respectively arranged at the connection positions of the fireproof wall body, the hole wall and the frame body wall, the aluminum silicate needled blanket layers are made of aluminum silicate needled blanket materials, meanwhile, the installed gap is formed by pointing with fireproof paint mortar, a flexible waterproof putty layer with the thickness of 2mm is coated on the fireproof wall body in a scraping manner, and an air-entrained leveling mortar layer with the thickness of 8mm is coated on the outer surface of the flexible waterproof putty layer in a scraping manner, so that gaps among ALC plates in the fireproof wall body are filled and leveled, the fireproof performance and sealing performance of each connection position can be ensured, the fireproof effect of the plugging structure is further improved, and a layer of 50mm thick ALC plates are fixed on the front surface and the back surface of the frame body, so that the fireproof performance of the frame body can be effectively ensured.

According to the invention, color steel plates are respectively adopted for edge covering at the connection positions of the fireproof wall body, the opening wall and the frame body wall, so that the appearance of the connection positions can be effectively beautified.

The fireproof and explosion-proof plate is arranged in a steel frame body and consists of a first metal surface structure rock wool composite plate, a second metal surface structure rock wool composite plate and a non-magnetic conductive stainless steel impact-resistant plate which are distributed side by side, wherein the first metal surface structure rock wool composite plate and the second metal surface structure rock wool composite plate are formed by connecting a plurality of metal surface structure rock wool composite plates side by side through rabbets, the connecting efficiency is high, a fireproof heat-insulating mortar structure is stitched at a joint, the sealing performance and the fireproof performance can be ensured simultaneously, the metal surface structure rock wool composite plate comprises the rock wool composite plate and a non-magnetic conductive 304 stainless steel surface layer coated on the outer surface of the rock wool composite plate, the thickness of the first metal surface structure rock wool composite plate is 50mm, the spacing between the second metal surface structure rock wool composite plate is 150mm, and therefore, the fireproof and explosion-proof plate has very good fireproof performance, meanwhile, the thickness of the non-magnetic conductive stainless steel composite plate is 70mm, and the fireproof and heat-insulating mortar structure is positioned at a conversion side, and the spacing between the fireproof and explosion-proof plate and the second metal surface structure rock wool composite plate is separated by 20mm, so that the electromagnetic explosion-proof effect is not only good.

The fireproof wall body and the steel frame body are connected through the first equilateral angle steel, the nonmagnetic stainless steel fixed pressing plate and the M12 bolt, a clamping groove is formed between the nonmagnetic stainless steel fixed pressing plate and the fireproof wall body, the first equilateral angle steel is welded on the fireproof wall body and clamped in the clamping groove, and the first equilateral angle steel is locked in the clamping groove through the M12 bolt, so that firm and firm connection can be formed between the fireproof wall body and the steel frame body; similarly, the first metal surface structure rock wool composite board is fixedly connected with a second equilateral angle steel fixed on the steel frame body through bolts, and the second metal surface structure rock wool composite board is fixedly connected with a third equilateral angle steel fixed on the steel frame body through bolts; and the non-magnetic stainless steel anti-impact plate clamping grooves are formed between the clamping plates fixed on the steel frame body and the third equilateral angle steel, and the non-magnetic stainless steel anti-impact plates are fixed with the steel frame body through clamping in all the non-magnetic stainless steel anti-impact plate clamping grooves, so that the fireproof wall body is firmly and firmly connected with the fireproof and explosion-proof plates through the steel frame body.

The fireproof wall is formed by splicing ALC plates with the thickness of 200mm in parallel by adopting a tongue-and-groove, the splicing efficiency of the fireproof wall is high, the fireproof performance is strong, the fireproof wall, the steel frame body and the joint between the ALC plates with the thickness of 50mm are densely filled with a filling structure formed by aluminum silicate needled blanket, the exposed part of the filling structure between the ALC plates with the thickness of 50mm on the converter transformer side and the fireproof wall is filled with a layer of fireproof mortar layer, a layer of color steel plate is sealed between the ALC plates with the thickness of 50mm on the converter transformer side and the non-magnetic conductive stainless steel impact-resistant plates, the fireproof wall is formed by splicing ALC plates with the length of 3200mm, the width of 600mm and the thickness of 200mm in parallel by adopting the tongue-and-groove, meanwhile, the fireproof wall is coated with a layer of 2mm thick leveling flexible waterproof putty layer, the outer surface of the flexible putty layer is coated with an 8mm thick air entrainment leveling layer, so that a sealing connection structure is formed between the fireproof wall, the steel frame body and the fireproof explosion-proof plates, the sealing performance of a power station valve hall is ensured, the fireproof performance and the fireproof performance are further improved, the fireproof effect is further improved, and the fireproof performance is ensured, and the fireproof performance of the fireproof performance is ensured, and the fireproof performance is ensured.

According to the invention, the converter transformer bushing mounting holes for mounting the converter transformer bushing are formed in the fireproof and explosion-proof plate, the inclination of the converter transformer bushing mounting holes is in accordance with the inclination of the converter transformer bushing, an aluminum silicate needled blanket layer is arranged between the pipe wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting holes, the aluminum silicate needled blanket layer can play a role in heat insulation and fireproof sealing, meanwhile, a first ceramic silicon rubber sealing sleeve and a second ceramic silicon rubber sealing sleeve are arranged between the converter transformer bushing and the first metal surface structure rock wool composite plate and the second metal surface structure rock wool composite plate respectively, the first ceramic silicon rubber sealing sleeve and the second ceramic silicon rubber sealing sleeve respectively cover the parts of the converter transformer bushing, which are positioned at two sides of the fireproof and explosion-proof plate, and are respectively fixed with the first ceramic silicon rubber sealing sleeve and the second ceramic silicon rubber sealing sleeve through bolts respectively, so that the sealing performance between the converter transformer bushing and the hole wall of the converter transformer bushing mounting holes can be further improved.

According to the invention, a layer of 304 stainless steel shielding layer is fixed on the outer surfaces of the fireproof wall body, which are respectively positioned on the inner sides of the valve hall, and the steel frame body and the outer surfaces of the steel frame body, wherein all the first equilateral angle steel, the second equilateral angle steel, the third equilateral angle steel, the fourth equilateral angle steel, the fifth equilateral angle steel, the first stainless steel clamp, the second stainless steel clamp, the clamping plate, the color steel plate, the M12 bolt, the purlin and the bolt are all made of austenitic S304 nonmagnetic stainless steel, all the nonmagnetic stainless steel fixed pressing plates are all made of austenitic S304 nonmagnetic stainless steel plates with the thickness of 5mm, all the steel frame body and the steel frame body are all formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes, and all the steel bars in the ALC plates are HRB400S hot-rolled austenitic threaded S304 nonmagnetic stainless steel bars, so that electromagnetic vortex generation can be further prevented, and electromagnetic isolation effect is improved.

According to the invention, a gap is reserved between the outer tube wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting hole part formed by the non-magnetic-conductive stainless steel impact-resistant plate, so that the non-magnetic-conductive stainless steel impact-resistant plate can be effectively prevented from cutting the second ceramic silicon rubber sealing sleeve, the flexible second ceramic silicon rubber sealing sleeve can be effectively protected, meanwhile, a-20 multiplied by 4 aluminum alloy compression ring is arranged between the head of the bolt and the first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve, and the flexible first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve can be further protected.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a schematic view of the junction between the fireproof wall and the wall of the through-wall hole of the present invention.

FIG. 3 is a schematic view of the joint between the fireproof wall and the frame body.

FIG. 4 is a schematic diagram of the connection of the fireproof wall, the steel frame body and the fireproof and explosion-proof plate.

Fig. 5 is an enlarged view of a portion a of fig. 4.

Fig. 6 is an enlarged view of part B of fig. 4.

FIG. 7 is a tongue and groove mating view of the ALC plate of the present invention.

Fig. 8 is a tongue-and-groove splicing view of the rock wool composite board with the metal surface structure.

Fig. 9 is a schematic structural view of a rock wool composite board with a metal surface structure according to the invention.

Fig. 10 is a schematic view of a converter transformer bushing installed on a fireproof and explosion-proof plate according to the invention.

Wherein, the names corresponding to the reference numerals are:

1-frame body, 2-fireproof wall body, 3-steel frame body, 4-fireproof explosion-proof plate, 5-converter transformer sleeve mounting hole, 6-aluminum silicate needled blanket layer, 7-M12 bolt, 8-non-magnetic stainless steel fixed pressing plate, 9-clamping groove, 10-first equilateral angle steel, 11-second equilateral angle steel, 12-third equilateral angle steel, 13-clamping plate, 14-non-magnetic conductive stainless steel impact-resistant plate clamping groove, 15-first ceramic silicon rubber sealing sleeve, 16-first stainless steel clamp, 17-second ceramic silicon rubber sealing sleeve, 18-second stainless steel clamp, 19-first fireproof protection layer, 20-filling structure, 21-304 stainless steel shielding layer, 22-purlin, 23-first color steel plate, 24-fireproof mortar layer, 25-rock wool composite board, 26-non-magnetic conductive 304 stainless steel surface layer, 27-20 x 4 aluminum alloy pressing ring, 28-fourth equilateral angle steel, 29-fifth equilateral angle steel, 30-first magnetic stainless steel fixed pressing plate, 31-second stainless steel clamping groove, 32-first magnetic steel surface layer, 32-first magnetic steel clamp, 33-first stainless steel needle-first stainless steel blanket layer, 35-first fireproof protection layer, 20-filling structure, 21-304 stainless steel shielding layer, 22-first purlin, 22-first magnetic steel sheet, 23-first color-first stainless steel needled blanket layer, 24-first magnetic steel sheet, 24-first magnetic steel surface layer, 35-fireproof protection layer, 21-first magnetic steel plate, 35-core layer, 33-magnetic steel composite plate.

Detailed Description

The invention will be further illustrated by the following description and examples, which include but are not limited to the following examples.

As shown in fig. 1-10, the fireproof wall plugging structure of the substation provided by the invention has the advantages of simple structure, scientific and reasonable design, convenience in use, strong fireproof and explosion-proof performance, good electromagnetic isolation effect, good sealing performance at each joint, strong fireproof and explosion-proof performance of the fireproof and explosion-proof plate of the converter transformer bushing of the power station valve hall, good electromagnetic isolation effect, stable and firm connection between the fireproof and explosion-proof plate and the fireproof wall, and good sealing performance at the joint gap. The invention provides a square wall penetrating hole on a firewall 36 of a power station valve hall, wherein a blocking structure is arranged in the wall penetrating hole and comprises a large blocking structure and a small blocking structure which is arranged in the large blocking structure and is used for installing a converter transformer bushing 37; the large plugging structure comprises a frame body 1 formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and installed in a wall penetrating hole, and a fireproof wall body 2 installed in the frame body 1 and formed by a plurality of ALC plates through rabbets in a side-by-side plugging mode, wherein the frame body 1 is in a cross shape, four hole-shaped installation cavities are formed between the frame body 1 and the wall of the wall penetrating hole, each installation cavity is internally provided with the fireproof wall body 2, and the frame body 1 is connected with the wall of the wall penetrating hole through expansion bolts or chemical bolts.

The two fireproof walls 2 distributed side by side are respectively provided with small plugging structure mounting holes for mounting the small plugging structures, each small plugging structure mounting hole is internally provided with one small plugging structure, each small plugging structure comprises a steel frame body 3 which is formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and is arranged in the small plugging structure mounting holes and takes a shape of a mouth, and a fireproof and explosion-proof plate 4 which is arranged in the steel frame body 3 and takes a shape of a square; the center of the fireproof and explosion-proof plate 4 is provided with a converter transformer sleeve mounting hole 5 matched with the converter transformer sleeve, the converter transformer sleeve mounting hole 5 is distributed in an inclined mode, the inclination of the converter transformer sleeve mounting hole is consistent with that of the converter transformer sleeve, the converter transformer sleeve is mounted in the converter transformer sleeve mounting hole 5, and a layer of aluminum silicate needled blanket layer 6 formed by an aluminum silicate needled blanket is filled between the hole wall of the converter transformer sleeve mounting hole 5 and the outer pipe wall of the converter transformer sleeve.

The length of the ALC plates forming the fireproof wall body 2 is 3200mm, the width of the ALC plates is 600mm, the thickness of the ALC plates is 200mm, two adjacent ALC plates forming the fireproof wall body 2 in the same square-shaped mounting cavity are spliced through a tongue-and-groove, all the ALC plates forming the fireproof wall body 2 in the same square-shaped mounting cavity are spliced into the fireproof wall body 2 through the tongue-and-groove in sequence, and each square-shaped mounting cavity is internally provided with one fireproof wall body 2; the fireproof wall body 2 is fixedly provided with a plurality of non-magnetic stainless steel fixing pressing plates 8 which are Z-shaped through M12 bolts 7, a clamping groove 9 is formed between each non-magnetic stainless steel fixing pressing plate 8 and the fireproof wall body 2, all the non-magnetic stainless steel fixing pressing plates 8 encircle the circumference of the small plugging structure mounting holes, more than two first equal angle steels 10 of L100x10 are equidistantly welded on the outer ring surface of the steel frame body 3, all the first equal angle steels 10 encircle the circumference of the outer ring surface of the steel frame body 3, the number of the first equal angle steels 10 is the same as the number of the clamping grooves 9 and corresponds to one, all the clamping grooves 9 are positioned on the inner side of a valve hall of a power station valve hall, and the first equal angle steels 10 are clamped in the corresponding clamping grooves 9 and fastened through the M12 bolts 7.

The center of the fireproof and explosion-proof plate 4 is provided with a converter transformer sleeve mounting hole 5 for mounting a converter transformer sleeve, the fireproof and explosion-proof plate 4 comprises a first metal surface structure rock wool composite plate 41, a second metal surface structure rock wool composite plate 42 and a non-magnetic conductive stainless steel shock-resistant plate 43 which are sequentially stacked from the inner side of a valve hall to the converter transformer side, the converter transformer sleeve mounting hole 5 sequentially penetrates through the first metal surface structure rock wool composite plate 41, the second metal surface structure rock wool composite plate 42 and the non-magnetic conductive stainless steel shock-resistant plate 43, and the aluminum silicate needled blanket layer 6 is positioned between the hole walls of the converter transformer sleeve mounting hole parts formed by the first metal surface structure rock wool composite plate 41 and the second metal surface structure rock wool composite plate 42 and the outer wall of the converter transformer sleeve.

The inner ring surface of the steel frame body 3 is equidistantly welded with more than two second equilateral angle steels 11 with L50x6, all the second equilateral angle steels 11 are distributed around the inner ring surface of the steel frame body 3, and the rock wool composite board 41 with the first metal surface structure is respectively fixed with each second equilateral angle steel 11 through bolts; the inner ring surface of the steel frame body 3 is equidistantly welded with more than two third equilateral angle steels 12 with L100x10, all the third equilateral angle steels 12 are distributed around the inner ring surface of the steel frame body 3, and the rock wool composite board 42 with the second metal surface structure is respectively fixed with each third equilateral angle steel 12 through bolts; the steel frame body 3 is equidistantly welded with a circle of clamping plates 13 made of austenite S304 nonmagnetic stainless steel on the side surface of the converter transformer side, a nonmagnetic stainless steel impact-resistant plate clamping groove 14 is formed between each third equilateral angle steel 12 and each clamping plate 13, the peripheries of the nonmagnetic stainless steel impact-resistant plates 43 are respectively and fixedly clamped in all the nonmagnetic stainless steel impact-resistant plate clamping grooves 14, and the second equilateral angle steel 11, the third equilateral angle steel 12 and the nonmagnetic stainless steel impact-resistant plate clamping grooves 14 are sequentially distributed side by side from the inner side of the valve hall to the converter transformer side.

A gap is reserved between the outer pipe wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting hole part formed by the non-magnetic conductive stainless steel impact-resistant plate 43; a first ceramic silicon rubber sealing sleeve 15 formed by ceramic silicon rubber is arranged between the outer pipe wall of the converter transformer sleeve and the outer surface of the rock wool composite board 41 with the first metal surface structure, a first stainless steel clamp 16 is arranged on the first ceramic silicon rubber sealing sleeve 15, the first ceramic silicon rubber sealing sleeve 15 is fixed with the outer pipe wall of the converter transformer sleeve through the first stainless steel clamp 16, and the first ceramic silicon rubber sealing sleeve 15 is fixed on the outer surface of the rock wool composite board 41 with the first metal surface structure through bolts.

The second ceramic silicone rubber sealing sleeve 17 formed by ceramic silicone rubber is arranged between the outer pipe wall of the converter transformer sleeve and the outer surface of the second metal surface structure rock wool composite board 42, a second stainless steel clamp 18 is arranged on the second ceramic silicone rubber sealing sleeve 17, the second ceramic silicone rubber sealing sleeve 17 is fixed with the outer pipe wall of the converter transformer sleeve through the second stainless steel clamp 18, the second ceramic silicone rubber sealing sleeve 17 is fixed on the outer surface of the second metal surface structure rock wool composite board 42 through bolts, and a second ceramic silicone rubber sealing sleeve part fixed on the second metal surface structure rock wool composite board 42 is positioned between the second metal surface structure rock wool composite board 42 and the non-magnetic conductive stainless steel impact plate 43.

The joint of the first fireproof protection layer 19 positioned on the converter transformer side and the non-magnetic conductive stainless steel impact-resistant plate 43 is coated with a first color steel plate 23 made of an austenite S304 non-magnetic stainless steel plate with the thickness of 1mm, the first color steel plate 23 is respectively fixed with the first fireproof protection layer 19 and the non-magnetic conductive stainless steel impact-resistant plate 43 through bolts, and the outer surface of the filling structure 20 positioned between the first fireproof protection layer 19 on the converter transformer side and the fireproof wall body 2 is filled with a fireproof mortar layer 24; the fireproof wall body 2 is coated with a flexible leveling water-resistant putty layer with the thickness of 2mm on one side face of the converter transformer side, and an air-entrained leveling mortar layer with the thickness of 8mm is coated on the outer surface of the flexible water-resistant putty layer.

The length, width and thickness of the rock wool composite board 41 with the first metal surface structure are 3100mm multiplied by 3000mm multiplied by 50mm respectively, the length, width and thickness of the rock wool composite board 42 with the second metal surface structure are 3100mm multiplied by 3000mm multiplied by 150mm respectively, and the length, width and thickness of the non-magnetic conductive stainless steel impact-resistant board 43 are 3100mm multiplied by 3000mm multiplied by 70mm respectively; the first metal surface structure rock wool composite board 41 is formed by splicing three metal surface structure rock wool composite boards with the specification of 1200mm multiplied by 3000mm multiplied by 50mm, 1200mm multiplied by 3000mm multiplied by 50mm and 700mm multiplied by 3000mm multiplied by 50mm side by side through rabbets, and all splicing gaps are in a pointing joint with a fireproof heat insulation mortar structure; the second metal surface structure rock wool composite board 42 is formed by splicing three metal surface structure rock wool composite boards with the specification of 1200mm multiplied by 3000mm multiplied by 150mm, 1200mm multiplied by 3000mm multiplied by 150mm and 700mm multiplied by 3000mm multiplied by 150mm side by side through rabbets, and all splicing gaps are in a pointing joint with a fireproof heat insulation mortar structure; the rock wool composite board with the metal surface structure comprises a rock wool composite board 25 and a non-magnetic-conductive 304 stainless steel surface layer 26 tightly wrapped on the outer surface of the rock wool composite board 25, wherein the thickness of the non-magnetic-conductive 304 stainless steel surface layer 26 is 0.6mm.

According to the invention, gaps are reserved between the first metal surface structure rock wool composite board 41 and the second metal surface structure rock wool composite board 42 and between the second metal surface structure rock wool composite board 42 and the non-magnetic conductive stainless steel impact-resistant board 43, the gap between the first metal surface structure rock wool composite board 41 and the second metal surface structure rock wool composite board 42 is 10mm, and the gap between the second metal surface structure rock wool composite board 42 and the non-magnetic conductive stainless steel impact-resistant board 43 is 20mm.

According to the invention, a circle of Z-shaped first nonmagnetic stainless steel fixed pressing plates 30 are circumferentially fixed on the periphery of the fireproof wall body 2 through M12 bolts 7, first clamping grooves 31 are formed between the first nonmagnetic stainless steel fixed pressing plates 30 and the fireproof wall body 2, a circle of L50x6 fourth equilateral angle steels 28 are circumferentially and equidistantly fixed on the hole wall of the through-wall hole through expansion bolts or chemical bolts respectively, more than two L100x10 fifth equilateral angle steels 29 are equidistantly welded on each side wall of the frame body 1 respectively, the same first clamping grooves 31 distributed on the hole wall side of the through-wall hole on the fireproof wall body 2 are used for clamping the fourth equilateral angle steels 28, the same first clamping grooves 31 distributed on the frame body side on the fireproof wall body 2 are used for clamping the fifth equilateral angle steels 29, the fireproof wall body 2 is clamped with the fourth equilateral angle steels 28 through the first clamping grooves 31, and the same fireproof wall body 2 is fixed with the first equilateral angle steels 29 through the first clamping grooves 31.

The two sides of the connection part of the fireproof wall body 2 and the wall of the through-wall hole are respectively coated with a first aluminum silicate needled blanket layer 32 formed by aluminum silicate needled blanket, the outer surface of the first aluminum silicate needled blanket layer 32 is coated with a second color steel plate 33 made of an austenitic S304 nonmagnetic stainless steel plate with the thickness of 1mm, and the second color steel plate 33 is respectively fixed with the fireproof wall body 2 and the firewall of the power station valve hall through bolts; the fireproof wall body 2 is provided with a flexible leveling water-resistant putty layer with the thickness of 2mm in a scraping manner on one side surface of the converter transformer side, and is provided with an air-entrained leveling mortar layer with the thickness of 8mm in a scraping manner on the outer surface of the flexible water-resistant putty layer; the gaps formed between the first aluminum silicate needled blanket layer 32, the second color steel plate 33, the fireproof wall body 2 and the wall of the through-wall hole are filled with fireproof paint mortar.

The fireproof wall is formed by splicing ALC plates with the thickness of 200mm in parallel by adopting a tongue-and-groove, the splicing efficiency of the fireproof wall is high, the fireproof performance is strong, the fireproof wall, the steel frame body and the joint between the ALC plates with the thickness of 50mm are densely filled with a filling structure formed by aluminum silicate needled blanket, the exposed part of the filling structure between the ALC plates with the thickness of 50mm on the converter transformer side and the fireproof wall is filled with a layer of fireproof mortar layer, a layer of color steel plate is sealed between the ALC plates with the thickness of 50mm on the converter transformer side and the non-magnetic conductive stainless steel impact-resistant plates, the fireproof wall is formed by splicing ALC plates with the length of 3200mm, the width of 600mm and the thickness of 200mm in parallel by adopting the tongue-and-groove, meanwhile, the fireproof wall is coated with a layer of 2mm thick leveling flexible waterproof putty layer, the outer surface of the flexible putty layer is coated with an 8mm thick air entrainment leveling layer, so that a sealing connection structure is formed between the fireproof wall, the steel frame body and the fireproof explosion-proof plates, the sealing performance of a power station valve hall is ensured, the fireproof performance and the fireproof performance are further improved, the fireproof effect is further improved, and the fireproof performance is ensured, and the fireproof performance of the fireproof performance is ensured, and the fireproof performance is ensured. According to the invention, color steel plates are respectively adopted for edge covering at the connection positions of the fireproof wall body, the opening wall and the frame body wall, so that the appearance of the connection positions can be effectively beautified.

According to the invention, a first fireproof protection layer 19 formed by 50 mm-thick ALC plates is fixed on the front side and the back side of a steel frame body 3 through bolts respectively, a filling structure 20 formed by aluminum silicate needled carpets is filled in a gap between the fireproof wall body 2 and the first fireproof protection layer 19 and the steel frame body 3, and the gap between the fireproof wall body 2 and the first fireproof protection layer 19 and the steel frame body 3 is densely filled by the filling structure 20; the front and back sides of the frame body 1 are respectively fixed with a second fireproof protection layer 34 composed of ALC plates with the thickness of 50mm through bolts, and the connection parts of the fireproof wall body 2 and the frame body 1 and the second fireproof protection layer 34 are respectively coated with a second aluminum silicate needled blanket layer 35 formed by aluminum silicate needled blankets.

According to the invention, the fireproof wall body 2 is coated with a layer of 304 stainless steel shielding layer 21 with the thickness of 0.6mm on the outer surface positioned on the inner side of a valve hall, the outer surface coated on the steel frame body 3 and positioned on the outer surface of the first fireproof protection layer 19 positioned on the inner side of the valve hall and the outer surface coated on the frame body 1 and positioned on the outer surface of the second fireproof protection layer 34 positioned on the inner side of the valve hall; the fireproof wall body 2 is uniformly provided with a plurality of C80×40X20X2.5 purlins 22 on the outer surface positioned on the inner side of the valve hall, and the 304 stainless steel shielding layer 21 is fixedly connected with all the purlins 22 through bolts respectively.

According to the invention, all the first equilateral angle steel 10, all the second equilateral angle steel 11, all the third equilateral angle steel 12, all the fourth equilateral angle steel 28, all the fifth equilateral angle steel 29, all the M12 bolts 7, all the expansion bolts or chemical bolts, all the purlins 22 and all the bolts are made of austenitic S304 nonmagnetic stainless steel, all the nonmagnetic stainless steel fixed pressing plates 8 and the first nonmagnetic stainless steel fixed pressing plates 30 are made of 5mm thick austenitic S304 nonmagnetic stainless steel plates, all the steel bars in the ALC plates are HRB400S hot-rolled threaded austenitic S304 nonmagnetic stainless steel bars, all the first stainless steel clamp 16 and the second stainless steel clamp 18 are made of austenitic S304 nonmagnetic stainless steel, bolts for fixing the first ceramic silicon rubber sealing sleeve 15 or the second ceramic silicon rubber sealing sleeve 17 are penetrated by-20X 4 aluminum alloy 27-27, and the first ceramic silicon rubber sealing sleeve 15 or the second ceramic silicon rubber sealing sleeve 17 are positioned between the first ceramic silicon rubber sealing sleeve and the first ceramic compression ring 17.

According to the invention, a gap is reserved between the outer tube wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting hole part formed by the non-magnetic-conductive stainless steel impact-resistant plate, so that the non-magnetic-conductive stainless steel impact-resistant plate can be effectively prevented from cutting the second ceramic silicon rubber sealing sleeve, the flexible second ceramic silicon rubber sealing sleeve can be effectively protected, meanwhile, a-20 multiplied by 4 aluminum alloy compression ring is arranged between the head of the bolt and the first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve, and the flexible first ceramic silicon rubber sealing sleeve or the second ceramic silicon rubber sealing sleeve can be further protected. The specifications and performance parameters of the ALC plate are shown in tables 1 and 2, and the performance parameters of the rock wool composite plate are shown in Table 3.

TABLE 1 ALC Panel Specification and Performance parameter Table of the invention

TABLE 2 ALC Panel Specification and Performance parameter Table of the invention

Table 3 rock wool composite panel performance parameters

The non-magnetic stainless steel impact-resistant plate has the following parameters:

the total thickness of the non-magnetic stainless steel impact-resistant plate exceeds 60mm, and the non-magnetic stainless steel impact-resistant plate consists of a double-layer panel, square steel pipe keels, a binding plate and connecting pieces, and the physical structure is similar to a steel door plate. Wherein, the panel adopts an austenite S304 non-magnetic stainless steel plate with the thickness of 3 mm. The keel is an austenitic S304 non-magnetic stainless steel square steel pipe with the thickness of 50mmx and 6 mm. The binding plate is an austenitic S304 nonmagnetic stainless steel plate with the thickness of 1 mm. The connecting piece adopts an austenite S304 non-magnetic stainless steel plate with the thickness of 5 mm. All other connecting pieces such as bolts are made of austenitic S304 nonmagnetic stainless steel.

The aluminum silicate needled blanket is densely filled in a gap between the rock wool composite board with the double-layer metal surface structure and the converter transformer sleeve. The cutting width of the aluminum silicate needled blanket is required to be larger than the edge sealing width by 20mm, the stacking of the aluminum silicate needled blanket adopts laminated staggered joint arrangement, and the stacking height of the aluminum silicate needled blanket is higher than 150% of the gap height. The wrapping surface of the rock wool composite board with the metal surface structure adopts a non-magnetic conductive 304 stainless steel surface layer with the thickness of 0.6mm, and the generation of electromagnetic vortex can be effectively prevented. The rock wool composite board adopts natural rock and does not contain asbestos. The rock wool composite board fiber adopts three-dimensional distribution, is even and compact, and has higher strength than common rock wool. The rock wool composite board is a firm material which is not easy to collapse, the high density of the rock wool composite board keeps the stability of the material, particularly the shrinkage resistance of the rock wool composite board at a continuous high temperature is strong, the integrity of the composite board is ensured, and therefore the best fireproof performance is achieved. The rock wool composite board with the metal surface structure can be self-supporting, no structural support is needed, and a purlin-free system is arranged within 12 m. The boards are spliced in a tongue-and-groove splicing mode, the boards are connected densely, and the connecting gaps are formed by pointing fireproof heat-insulating mortar.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present invention are still consistent with the present invention, and all the technical problems to be solved are included in the scope of the present invention.

Claims

1. A transformer substation firewall plugging structure is characterized in that: a square through-wall hole is formed in a fire wall of a power station valve hall, the blocking structure is arranged in the through-wall hole, and comprises a large blocking structure and a small blocking structure which is arranged in the large blocking structure and is used for installing a converter transformer sleeve;

the large plugging structure comprises a frame body (1) formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and installed in the wall penetrating hole, and a fireproof wall body (2) installed in the frame body (1) and formed by a plurality of ALC plates through rabbets in a side-by-side grafting mode, wherein the frame body (1) is in a cross shape, four hole-shaped installation cavities are formed between the frame body and the hole wall of the wall penetrating hole, each installation cavity is internally provided with the fireproof wall body (2), and the frame body (1) is connected with the hole wall of the wall penetrating hole through expansion bolts or chemical bolts;

two fireproof walls (2) distributed side by side are respectively provided with small plugging structure mounting holes for mounting the small plugging structures, each small plugging structure mounting hole is internally provided with one small plugging structure, each small plugging structure comprises a steel frame body (3) which is formed by welding austenitic S304 nonmagnetic stainless steel square steel pipes and is arranged in the small plugging structure mounting holes and takes a shape of a mouth, and a fireproof and explosion-proof plate (4) which is arranged in the steel frame body (3) and takes a shape of a square;

The fireproof and explosion-proof plate is characterized in that a converter transformer sleeve mounting hole (5) matched with the converter transformer sleeve is formed in the center of the fireproof and explosion-proof plate (4), the converter transformer sleeve mounting hole (5) is distributed in an inclined mode, the inclination of the converter transformer sleeve is consistent with that of the converter transformer sleeve, the converter transformer sleeve is mounted in the converter transformer sleeve mounting hole (5), and a layer of aluminum silicate needled blanket layer (6) formed by an aluminum silicate needled blanket is filled between the hole wall of the converter transformer sleeve mounting hole (5) and the outer pipe wall of the converter transformer sleeve.

2. A substation firewall plugging structure according to claim 1, wherein: the length of the ALC plates forming the fireproof wall body (2) is 3200mm, the width of the ALC plates is 600mm, the thickness of the ALC plates is 200mm, two adjacent ALC plates forming the fireproof wall body (2) in the same square-shaped mounting cavity are spliced through a tongue-and-groove, all the ALC plates forming the fireproof wall body (2) in the same square-shaped mounting cavity are sequentially spliced into the fireproof wall body (2) through the tongue-and-groove, and one fireproof wall body (2) is mounted in each square-shaped mounting cavity;

a plurality of non-magnetic stainless steel fixed pressing plates (8) which are Z-shaped are fixed on the fireproof wall body (2) through M12 bolts (7), one clamping groove (9) is formed between each non-magnetic stainless steel fixed pressing plate (8) and the fireproof wall body (2), all the non-magnetic stainless steel fixed pressing plates (8) are distributed around the small plugging structure mounting holes in a circle, more than two first equilateral angle steels (10) of L100x10 are equidistantly welded on the outer ring surface of the steel frame body (3), all the first equilateral angle steels (10) are distributed around the outer ring surface of the steel frame body (3), the number of the first equilateral angle steels (10) is the same as that of the clamping grooves (9) and corresponds to that of the clamping grooves (9), all the clamping grooves (9) are positioned on the inner side of a valve hall of a power station valve hall, and the first equilateral angle steels (10) are clamped in the corresponding clamping grooves (9) and fastened through the M12 bolts (7);

The fireproof and explosion-proof plate (4) is characterized in that a converter transformer bushing mounting hole (5) for mounting a converter transformer bushing is formed in the center of the fireproof and explosion-proof plate (4), the fireproof and explosion-proof plate (4) comprises a first metal surface structure rock wool composite plate (41), a second metal surface structure rock wool composite plate (42) and a non-magnetic-conductive stainless steel shock-resistant plate (43) which are sequentially stacked from the inner side of a valve hall to the converter transformer side, the converter transformer bushing mounting hole (5) sequentially penetrates through the first metal surface structure rock wool composite plate (41), the second metal surface structure rock wool composite plate (42) and the non-magnetic-conductive stainless steel shock-resistant plate (43), and the aluminum silicate needled blanket layer (6) is positioned between the hole wall of the converter transformer bushing mounting hole part formed by the first metal surface structure rock wool composite plate (41) and the second metal surface structure rock wool composite plate (42) and the outer wall of the converter transformer bushing;

the inner ring surface of the steel frame body (3) is equidistantly welded with more than two second equilateral angle steels (11) with L50x6, all the second equilateral angle steels (11) are distributed around the inner ring surface of the steel frame body (3), and the rock wool composite board (41) with the first metal surface structure is respectively fixed with each second equilateral angle steel (11) through bolts; the inner ring surface of the steel frame body (3) is equidistantly welded with more than two third equilateral angle steels (12) with L100x10, all the third equilateral angle steels (12) are distributed around the inner ring surface of the steel frame body (3), and the rock wool composite board (42) with the second metal surface structure is respectively fixed with each third equilateral angle steel (12) through bolts; the steel frame body (3) is provided with a circle of clamping plates (13) which are made of austenitic S304 nonmagnetic stainless steel and are welded on the side surface of the converter transformer side at equal intervals, a non-magnetic conductive stainless steel impact-resistant plate clamping groove (14) is formed between each third equilateral angle steel (12) and each clamping plate (13), the peripheries of the non-magnetic conductive stainless steel impact-resistant plates (43) are respectively fastened and connected in all the non-magnetic conductive stainless steel impact-resistant plate clamping grooves (14), and the second equilateral angle steel (11), the third equilateral angle steel (12) and the non-magnetic conductive stainless steel impact-resistant plate clamping grooves (14) are distributed side by side in sequence from the inner side of the valve hall to the converter transformer side.

3. A substation firewall plugging structure according to claim 2, wherein: a gap is reserved between the outer pipe wall of the converter transformer bushing and the hole wall of the converter transformer bushing mounting hole part formed by the non-magnetic conductive stainless steel impact-resistant plate (43);

a first ceramic silicon rubber sealing sleeve (15) formed by ceramic silicon rubber is arranged between the outer pipe wall of the converter transformer sleeve and the outer surface of the first metal surface structure rock wool composite board (41), a first stainless steel clamp (16) is arranged on the first ceramic silicon rubber sealing sleeve (15), the first ceramic silicon rubber sealing sleeve (15) is fixed with the outer pipe wall of the converter transformer sleeve through the first stainless steel clamp (16), and the first ceramic silicon rubber sealing sleeve (15) is fixed on the outer surface of the first metal surface structure rock wool composite board (41) through bolts;

a second ceramic silicon rubber sealing sleeve (17) formed by ceramic silicon rubber is arranged between the outer pipe wall of the converter transformer sleeve and the outer surface of the second metal surface structure rock wool composite board (42), a second stainless steel clamp (18) is arranged on the second ceramic silicon rubber sealing sleeve (17), the second ceramic silicon rubber sealing sleeve (17) is fixed with the outer pipe wall of the converter transformer sleeve through the second stainless steel clamp (18), the second ceramic silicon rubber sealing sleeve (17) is fixed on the outer surface of the second metal surface structure rock wool composite board (42) through bolts, and a second ceramic silicon rubber sealing sleeve part fixed on the second metal surface structure rock wool composite board (42) is positioned between the second metal surface structure rock wool composite board (42) and the non-magnetic conductive stainless steel shock-resistant board (43).

4. A substation firewall plugging structure according to claim 3, wherein: the method is characterized in that a first fireproof protection layer (19) formed by an ALC plate with the thickness of 50mm is fixed on the front side and the back side of the steel frame body (3) through bolts respectively, a first color steel plate (23) made of an S304 nonmagnetic stainless steel plate with the thickness of 1mm is coated at the joint of the first fireproof protection layer (19) and the nonmagnetic stainless steel impact plate (43) on the converter transformer side, the first color steel plate (23) is fixed with the first fireproof protection layer (19) and the nonmagnetic stainless steel impact plate (43) through bolts respectively, a filling structure (20) formed by aluminum silicate needled carpets is filled at the joint of the fireproof wall body (2), and a fireproof mortar layer (24) is filled on the outer surface of the filling structure (20) between the first fireproof protection layer (19) and the fireproof wall body (2) on the converter transformer side; the fireproof wall body (2) is coated with a flexible leveling water-resistant putty layer with the thickness of 2mm on one side face of the converter transformer side, and the outer surface of the flexible water-resistant putty layer is coated with an air-entrained leveling mortar layer with the thickness of 8 mm.

5. The substation firewall plugging structure according to claim 4, wherein: the length, width and thickness of the first metal surface structure rock wool composite board (41) are 3100mm multiplied by 3000mm multiplied by 50mm respectively, the length, width and thickness of the second metal surface structure rock wool composite board (42) are 3100mm multiplied by 3000mm multiplied by 150mm respectively, and the length, width and thickness of the non-magnetic conductive stainless steel impact-resistant board (43) are 3100mm multiplied by 3000mm multiplied by 70mm respectively;

the first metal surface structure rock wool composite board (41) is formed by splicing three metal surface structure rock wool composite boards with the specification of 1200mm multiplied by 3000mm multiplied by 50mm, 1200mm multiplied by 3000mm multiplied by 50mm and 700mm multiplied by 3000mm multiplied by 50mm side by side through rabbets, and fireproof heat-insulating mortar structures are formed by jointing all jointing gaps; the second metal surface structure rock wool composite board (42) is formed by splicing three metal surface structure rock wool composite boards with the specification of 1200mm multiplied by 3000mm multiplied by 150mm, 1200mm multiplied by 3000mm multiplied by 150mm and 700mm multiplied by 3000mm multiplied by 150mm side by side through rabbets, and all splicing gaps are in a pointing joint with a fireproof heat insulation mortar structure; the rock wool composite board with the metal surface structure comprises a rock wool composite board (25) and a non-magnetic-conductive 304 stainless steel surface layer (26) tightly coated on the outer surface of the rock wool composite board (25), wherein the thickness of the non-magnetic-conductive 304 stainless steel surface layer (26) is 0.6mm.

6. The substation firewall plugging structure according to claim 5, wherein: gaps are reserved between the first metal surface structure rock wool composite board (41) and the second metal surface structure rock wool composite board (42) and between the second metal surface structure rock wool composite board (42) and the non-magnetic conductive stainless steel impact-resistant board (43), the gap between the first metal surface structure rock wool composite board (41) and the second metal surface structure rock wool composite board (42) is 10mm, and the gap between the second metal surface structure rock wool composite board (42) and the non-magnetic conductive stainless steel impact-resistant board (43) is 20mm.

7. The substation firewall plugging structure according to claim 6, wherein: the fire wall body (2) all around is fixed with round first magnetism-free stainless steel fixed platen (30) that are the zigzag through M12 bolt (7) circumference, first magnetism-free stainless steel fixed platen (30) with be formed with first joint groove (31) between fire wall body (2), be fixed with round L50x 6's fourth equilateral angle steel (28) through expansion bolts or chemical bolt circumference equidistance on the wall of wearing the wall entrance respectively, equidistant welding has more than two on each lateral wall of the frame body (1) fifth equilateral angle steel (29) of L100x10 respectively, same one on fire wall body (2) distribute in wearing wall entrance to a cave wall side first joint groove (31) are used for the joint fourth equilateral angle steel (28), the same one on fire wall body (2) distribute in frame body side first joint groove (31) are used for the joint fifth equilateral angle steel (29), first joint groove (31) are passed through on fire wall body (2) first joint groove (31) with fire wall body (2) the same fire wall body the same fire wall body (2) the same fire wall body the fifth equilateral angle steel (29).

8. The substation firewall plugging structure according to claim 7, wherein: the two sides of the connection part of the fireproof wall body (2) and the wall of the through-wall hole are respectively coated with a first aluminum silicate needled blanket layer (32) formed by aluminum silicate needled blankets, the outer surface of the first aluminum silicate needled blanket layer (32) is coated with a second color steel plate (33) made of an austenite S304 nonmagnetic stainless steel plate with the thickness of 1mm, and the second color steel plate (33) is respectively fixed with the fireproof wall body (2) and the firewall of the power station valve hall through bolts; the gaps formed between the first aluminum silicate needled blanket layer (32), the second color steel plate (33), the fireproof wall body (2) and the wall of the through-wall hole are filled with fireproof paint mortar.

9. The substation firewall plugging structure according to claim 8, wherein: the filling structure (20) compactly fills gaps formed by connecting the fireproof wall body (2), the first fireproof protection layer (19) and the steel frame body (3); the front and back sides of the frame body (1) are respectively fixed with a second fireproof protection layer (34) consisting of ALC plates with the thickness of 50mm through bolts, and the connection parts of the fireproof wall body (2) and the frame body (1) and the second fireproof protection layer (34) are respectively coated with a second aluminum silicate needled blanket layer (35) formed by aluminum silicate needled blankets.

10. The substation firewall plugging structure according to claim 9, wherein: the fireproof wall body (2) is coated with a layer of 304 stainless steel shielding layer (21) with the thickness of 0.6mm on the outer surface positioned on the inner side of the valve hall, the outer surface coated on the steel frame body (3) and positioned on the outer surface of the first fireproof protection layer (19) positioned on the inner side of the valve hall and the outer surface coated on the frame body (1) and positioned on the outer surface of the second fireproof protection layer (34) positioned on the inner side of the valve hall; the fireproof wall body (2) is uniformly provided with a plurality of C80×40X20X2.5 purlines (22) on the outer surface positioned on the inner side of the valve hall, and the 304 stainless steel shielding layer (21) is fixedly connected with all the purlines (22) through bolts respectively;

all first equilateral angle steel (10), all second equilateral angle steel (11), all third equilateral angle steel (12), all fourth equilateral angle steel (28), all fifth equilateral angle steel (29), all M12 bolt (7), all expansion bolt or chemical bolt, all purlin (22), and all bolt all adopt austenite type S304 non-magnetic stainless steel, all non-magnetic stainless steel fixed platen (8) and first non-magnetic stainless steel fixed platen (30) all adopt 5mm thick austenite type S304 non-magnetic stainless steel bar, all the reinforcing bars in the ALCC board are HRB400S hot rolled screw thread austenite type S304 non-magnetic stainless steel bar, first stainless steel clamp (16) and second stainless steel clamp (18) all adopt austenite type S304 non-magnetic stainless steel for fixing on the first ceramic silicone rubber seal sleeve (15) or the second ceramic silicone rubber seal sleeve (17) are equipped with and wear to be in between 20-20X 4 ceramic silicone rubber seal sleeve (15) and the ceramic rubber seal ring (17) of the second ceramic screw bolt (17X 4).