CN116163636A - Self-locking fireproof door of transformer substation - Google Patents

Self-locking fireproof door of transformer substation Download PDF

Info

Publication number
CN116163636A
CN116163636A CN202211644090.9A CN202211644090A CN116163636A CN 116163636 A CN116163636 A CN 116163636A CN 202211644090 A CN202211644090 A CN 202211644090A CN 116163636 A CN116163636 A CN 116163636A
Authority
CN
China
Prior art keywords
plate
pressing
locking
fireproof core
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211644090.9A
Other languages
Chinese (zh)
Inventor
吴仲华
鲍旭光
耿磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Tongxiao Fire Proofing Door Co ltd
Original Assignee
Anhui Tongxiao Fire Proofing Door Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Tongxiao Fire Proofing Door Co ltd filed Critical Anhui Tongxiao Fire Proofing Door Co ltd
Priority to CN202211644090.9A priority Critical patent/CN116163636A/en
Publication of CN116163636A publication Critical patent/CN116163636A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/16Fireproof doors or similar closures; Adaptations of fixed constructions therefor
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00Other details of locks; Parts for engagement by bolts of fastening devices
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/70Door leaves
    • E06B3/72Door leaves consisting of frame and panels, e.g. of raised panel type
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/12Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/16Fireproof doors or similar closures; Adaptations of fixed constructions therefor
    • E06B5/161Profile members therefor
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/70Door leaves
    • E06B2003/7098Door leaves with bracing means crossing each other, e.g. diagonally disposed

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Special Wing (AREA)

Abstract

The invention discloses a self-locking fireproof door for a transformer substation, which comprises a bottom plate, wherein a fireproof core plate is arranged on a single-side plate surface corresponding to the bottom plate, the fireproof core plate comprises a frame for wrapping the side of the fireproof core plate, a pressing plate is arranged between the frame and the fireproof core plate, an elastic supporting device is arranged between the pressing plate and the fireproof core plate, a pressing strip is arranged on the side of the pressing plate, the pressing strip is pressed into a pressing groove by pressing the pressing plate, and a locking strip extends out of the strip-shaped groove and is fixed on a door frame to realize locking. Under the conditions of places such as a transformer substation, a fire disaster is an explosion fire, the side of the pressing plate is a pressing bar along with high-temperature and high-pressure impact force, the locking bar extends out of the bar-shaped groove and is extruded on the door frame through the cooperation of the pressing groove, and the strong impact force can sequentially destroy the brittle fixation between the locking bar and the fireproof core plate and block the gap between the door leaf and the door frame.

Description

Self-locking fireproof door of transformer substation
Technical Field
The invention belongs to the technical field of fireproof doors, and particularly relates to a self-locking fireproof door of a transformer substation.
Background
The extra-high voltage converter station is a station established in a high-voltage direct current transmission system for completing conversion of alternating current into direct current or converting direct current into alternating current and meeting the requirements of a power system on safety and stability and electric energy quality. An oil-immersed transformer having a capacity of 125 MV.A or more and an oil-immersed reactor having a capacity of 200Mvar or more are mounted therein. The extra-high voltage converter station is provided with an oil immersed reactor, and the oil immersed reactor contains combustible fuel oil, and when a fire disaster occurs, the flame is an explosive jet flame, so that the temperature of a pipeline can be raised to 1200 ℃ or even 1400 ℃ within 20 seconds.
The converter station or the transformer station is arranged in a closed and dry space, is a place easy to generate fire because of voltage arcing phenomenon or unbalanced high and low voltage, and not only needs frequent maintenance, but also needs proper fireproof measures. The door in the occasion of the closed space is not a common protective door, but a special fireproof door, has the function of blocking, and is convenient for access of maintenance personnel. The fire in the place is accompanied by the combustible oil, the fire is in an explosion type, the formed violent shock wave can directly destroy the door from the inside to the outside along with high pressure and high temperature, the fireproof door body is firm and fireproof, but the combination property with the door frame is insufficient, the hinge is directly broken and flies out under the action of the high pressure shock wave, and further, the fire of the transformer substation is diffused around along with the combustible insulating oil, so that more serious fire occurs.
As the door leaf, just can not accomplish closely laminating between itself and the door frame, because the door needs to conveniently open and close, and after door leaf and the inseparable laminating of door frame, inconvenient opening and closing also can cause the problem that the leakproofness descends for a long time.
Therefore, the door leaf of the fireproof door prepared by the invention can instantaneously react even if a fire disaster occurs in a state that the door frame is not attached, and a self-locking closed structure is formed, so that the door leaf and the door frame are tightly combined when the fire disaster occurs, the occurrence of a more serious fire disaster spreading phenomenon is prevented, and the fireproof door is suitable for explosion-type fire places such as transformer substations.
Disclosure of Invention
The invention aims to provide a self-locking fireproof door of a transformer substation, which can instantaneously react to form a self-locking closed structure even if a fire disaster occurs in a state that a door frame is not attached.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the self-locking fireproof door for the transformer substation comprises a bottom plate, wherein a fireproof core plate is arranged on a single-side plate surface corresponding to the bottom plate, and a step part is formed between the fireproof core plate and the bottom plate;
the fireproof core plate comprises a frame for wrapping the side of the fireproof core plate, a pressing plate is further arranged between the frame and the fireproof core plate, the side of the pressing plate is wrapped by the frame, and an elastic supporting device is arranged between the pressing plate and the fireproof core plate;
the side of the fireproof core plate is provided with locking strips, the locking strips are used for fixing the corresponding side of the fireproof core plate in a brittle manner, and the side of the frame corresponding to the locking strips is provided with a strip-shaped groove for the locking strips to extend out;
the side of the pressing plate is provided with a pressing bar, the locking bar is provided with a pressing groove for accommodating the pressing bar, the pressing bar is pressed into the pressing groove by pressing the pressing plate, and the locking bar extends out of the pressing groove and is fixed on the door frame to realize locking.
Further, the elastic supporting device comprises a sponge layer positioned between the pressing plate and the fireproof core plate.
Further, the fireproof core plate is internally provided with the supporting frame, the supporting frame is in an X shape, four end points corresponding to the supporting frame are located at four corner positions of the fireproof core plate, the fireproof core plate is divided into four blocks by the supporting frame, and the supporting frame is fixed on the bottom plate.
Further, the support frame has a support wall wrapping the fire-proof core plate against the side, and the fire-proof core plate is fixed by the support wall.
Further, the elastic supporting device further comprises springs located between the pressing plate and the bottom plate, sleeves are arranged at the corresponding central crossing position and the four end points of the supporting frame, and the springs are located in the sleeves.
Further, the pressing plate is correspondingly provided with a fixing piece sleeved in the spring, the fixing piece is a pipe body, and the end part of the fixing piece is fixed on the pressing plate.
Further, the locking strip is formed by bending steel plates in multiple ways, a clamping groove is formed in one side of the locking strip corresponding to the fireproof core plate and used for clamping the side of the fireproof core plate, the pressing groove is provided with a bevel part, and the pressing strip is formed by bending the side of the pressing plate in a buckling mode.
Further, the lock bar is internally provided with a plate rib for supporting.
Further, the side of the frame extends to the side of the bottom plate, and the side of the bottom plate is wrapped after being bent.
The invention has the following beneficial effects: under the condition of places such as a transformer substation, a fire disaster is an explosion fire, and when the impact force impacts the pressing plate, the pressing plate is forced to be inwards extruded, the side of the pressing plate is provided with a pressing bar, the pressing bar is matched with the pressing groove, so that the stress and the transmission direction are changed by 90 degrees, the pressing force formed by the impact is further changed into the moving direction along the locking bar, the locking bar extends out of the bar-shaped groove and is extruded on the door frame, and the brittle fixation between the locking bar and the fireproof core plate can be broken by the violent impact force in sequence, so that a gap between the door leaf and the door frame is blocked.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings used for describing the embodiments will be briefly described below.
Fig. 1: the frame of the invention is disassembled into a structural schematic diagram.
Fig. 2: the pressing plate of the invention is a schematic diagram of a disassembling structure.
Fig. 3: the back structure of the pressing plate is schematically shown.
Fig. 4: the invention discloses a schematic diagram of a locking strip and a fire-proof core plate disassembly structure.
Fig. 5: the structure of the bottom plate is schematically shown.
Fig. 6: the sectional structure of the locking strip is schematically shown.
Fig. 7: the door leaf of the invention is a complete assembled structure schematic diagram.
In the drawings, the list of components represented by the various numbers is as follows: the fireproof door comprises a bottom plate 1, a fireproof core plate 6, a frame 2, a pressing plate 3, a locking strip 5, a strip-shaped groove 21, a pressing strip 31, a pressing groove 51, a sponge layer 4, a supporting frame 7, a supporting wall 71, a spring 32, a sleeve 72, a fixing piece 33, a clamping groove 52 and a plate rib 53.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-7: the self-locking fireproof door of the transformer substation comprises a bottom plate 1, wherein the bottom plate is a galvanized steel plate, a fireproof core plate 6 is arranged on a single-side plate surface corresponding to the bottom plate 1, the fireproof core plate is made of expanded perlite materials, and a step part is formed between the fireproof core plate 6 and the bottom plate 1; the step portion is used for being matched with the door frame in the direction and is used for accommodating the door frame. The bottom plate is a supporting plate, the corresponding fireproof surface is a fireproof core plate, and the backfire surface is a flat plate.
The fireproof core plate comprises a frame 2 for wrapping the side of a fireproof core plate 6, wherein the frame is formed by bending galvanized steel plates for 90 degrees, is used for fixing the fireproof core plate, is in a rectangular square frame shape, is provided with screw holes and is fixed through bolts. A pressing plate 3 is also arranged between the frame 2 and the fireproof core plate 6, the side of the pressing plate 3 is wrapped by the frame 2, and an elastic supporting device is arranged between the pressing plate 3 and the fireproof core plate 6; the elastic supporting device can be extruded relatively when the plate surface is pressed by the pressing plate, so that the pressing plate is easy to press inwards.
The side of the fireproof core plate 6 is provided with locking strips 5, the locking strips 5 are used for fixing the corresponding side of the fireproof core plate 6 in a brittle manner, and the side of the frame 2 corresponding to the locking strips 5 is provided with a strip-shaped groove 21 for the locking strips 5 to extend out; the brittle fixing mode of the locking strip is watering and bonding, and the fireproof core plate is made of inorganic materials, so that the locking strip is easy to separate from the constraint of the fireproof core plate.
The pressing plate 3 has a pressing bar 31 on the side, and the lock bar 5 has a pressing groove 51 for accommodating the pressing bar 31, and pressing the pressing plate 3 presses the pressing bar 31 into the pressing groove 51, so that the lock bar 5 extends out of the bar groove 21 and is fixed to the door frame, thereby realizing locking.
Under the condition of places such as a transformer substation, a fire disaster is an explosion fire, and when the impact force impacts the pressing plate, the pressing plate is forced to be inwards extruded, the side of the pressing plate is provided with a pressing bar, the pressing bar is matched with the pressing groove, so that the stress and the transmission direction are changed by 90 degrees, the pressing force formed by the impact is further changed into the moving direction along the locking bar, the locking bar extends out of the bar-shaped groove and is extruded on the door frame, and the brittle fixation between the locking bar and the fireproof core plate can be broken by the violent impact force in sequence, so that a gap between the door leaf and the door frame is blocked.
Meanwhile, the larger the impact force is, the larger the pressing force of the pressing plate is, the larger the locking bar is pressed and the moving amplitude is, the pressing plate can deform, but the effect of rapidly blocking fire spreading can be well achieved, and the situation that the fire spreading occurs due to insulation of a transformer place is prevented.
As shown in fig. 2: the elastic support means comprise a sponge layer 4 between the pressing plate 3 and the fire-resistant core plate 6. The sponge layer can be deformed when having elasticity to press, and the sponge layer can effectively give sound insulation simultaneously, improves the sound insulation effect of door leaf.
As shown in fig. 4: the fireproof core plate 6 is internally provided with the supporting frame 7, the supporting frame 7 is in an X shape, four end points corresponding to the supporting frame 7 are positioned at four corner positions of the fireproof core plate 6, the fireproof core plate 6 is divided into four by the supporting frame 7, and the supporting frame 7 is fixed on the bottom plate 1. The fireproof core board is made of expanded perlite, is porous in the inner part, is soft in texture, is easy to crack and is easy to damage under the action of the pressing plate, so that the fireproof core board is supported by the supporting frame, and when the fireproof core board is installed, the supporting frame is welded first, then the fireproof core board is spliced in sequence and fixed.
As shown in fig. 4 and 5: the support bracket 7 has a support wall 71 that wraps the fireproof core plate 6 against the side, and the fireproof core plate 6 is fixed by the support wall 71. The supporting wall is parallel to the bottom, the supporting wall and the supporting frame are of an integrated structure, the section of the supporting frame is I-shaped, holes are formed in the supporting wall, and the supporting wall is fixed in a mode of penetrating through the fireproof core plate through bolts.
The elastic support device further comprises a spring 32 positioned between the pressing plate 3 and the bottom plate 1, and sleeves 72 are arranged at the corresponding central intersection and four end points of the support frame 7, and the spring 32 is positioned in each sleeve 72. Besides the elastic supporting function of the sponge layer, the supporting function is further improved.
As shown in fig. 3: the pressing plate 3 is correspondingly provided with a fixing piece 33 sleeved in the spring 32, the fixing piece 33 is a pipe body, and the end part of the fixing piece 33 is fixed on the pressing plate 3. The spring is used for sleeving and fixing the spring, and is stably installed.
The locking strip 5 is formed by bending a plurality of steel plates, one side of the locking strip 5 corresponding to the fireproof core plate 6 is provided with a clamping groove 52 for clamping the side of the fireproof core plate 6, the pressing groove 51 is provided with a bevel part, and the pressing strip 31 is a strip-shaped protrusion formed by inwards buckling and bending the side of the pressing plate 3. The cross sections of the pressing groove and the pressing strip are triangular, and the corresponding inclined surfaces are mutually abutted when being pressed, so that the stress and the moving direction are changed by 90 degrees.
As shown in fig. 6: the locking bar 5 is internally provided with a plate rib 53 for support. The locking strip is formed by bending a galvanized steel sheet, and is internally reinforced through the plate ribs, so that the supporting strength is improved, and the deformation is prevented.
The side of the frame 2 extends to the side of the bottom plate 1, and the side of the bottom plate 1 is wrapped after being bent. The bottom plate and the frame form a more complete structure, and the frame is fixed through bolts corresponding to partial openings which are parallel to and coincide with the bottom plate.
The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.

Claims (9)

1. The utility model provides a prevent fire door from locking-type of transformer substation which characterized in that:
the fireproof core plate comprises a bottom plate (1), wherein a fireproof core plate (6) is arranged on a single-side plate surface corresponding to the bottom plate (1), and a step part is formed between the fireproof core plate (6) and the bottom plate (1);
the fireproof core plate comprises a frame (2) for wrapping the side of a fireproof core plate (6), a pressing plate (3) is further arranged between the frame (2) and the fireproof core plate (6), the side of the pressing plate (3) is wrapped by the frame (2), and an elastic supporting device is arranged between the pressing plate (3) and the fireproof core plate (6);
the side of the fireproof core plate (6) is provided with locking strips (5), the locking strips (5) are used for brittle fixing of the corresponding side of the fireproof core plate (6), and the side of the frame (2) corresponding to the locking strips (5) is provided with a strip-shaped groove (21) for the locking strips (5) to extend out;
the side of the pressing plate (3) is provided with a pressing bar (31), the locking bar (5) is provided with a pressing groove (51) for accommodating the pressing bar (31), the pressing plate (3) is pressed into the pressing groove (51), and the locking bar (5) extends out of the bar-shaped groove (21) and is fixed on a door frame to realize locking.
2. The substation self-locking fire door of claim 1, wherein: the elastic supporting device comprises a sponge layer (4) positioned between the pressing plate (3) and the fireproof core plate (6).
3. The substation self-locking fire door of claim 1, wherein: the fireproof core board is characterized in that a supporting frame (7) is arranged in the fireproof core board (6), the supporting frame (7) is in an X shape, four end points corresponding to the supporting frame (7) are located at four corner positions of the fireproof core board (6), the fireproof core board (6) is divided into four blocks by the supporting frame (7), and the supporting frame (7) is fixed on the bottom plate (1).
4. A substation self-locking fire door according to claim 3, wherein: the supporting frame (7) is provided with a supporting wall (71) wrapping the fireproof core plate (6) against the side, and the fireproof core plate (6) is fixed through the supporting wall (71).
5. A substation self-locking fire door according to claim 3, wherein: the elastic supporting device further comprises springs (32) located between the pressing plate (3) and the bottom plate (1), sleeves (72) are arranged at the corresponding central intersection and four end points of the supporting frame (7), and the springs (32) are located in the sleeves (72).
6. The substation self-locking fire door of claim 5, wherein: the pressing plate (3) is correspondingly provided with a fixing piece (33) sleeved in the spring (32), the fixing piece (33) is a pipe body, and the end part of the fixing piece is fixed on the pressing plate (3).
7. The substation self-locking fire door of claim 1, wherein: the lock bar (5) is formed by bending steel plates in multiple ways, one side of the lock bar (5) corresponding to the fireproof core plate (6) is provided with a clamping groove (52) for clamping the side of the fireproof core plate (6), the pressing groove (51) is provided with a bevel part, and the pressing bar (31) is formed by bending the side of the pressing plate (3) in a buckling mode to form a strip-shaped protrusion.
8. The substation self-locking fire door of claim 7, wherein: the lock bar (5) is internally provided with a plate rib (53) for supporting.
9. The substation self-locking fire door of claim 1, wherein: the side of the frame (2) extends to the side of the bottom plate (1), and the side of the bottom plate (1) is wrapped after being bent.
CN202211644090.9A 2022-12-20 2022-12-20 Self-locking fireproof door of transformer substation Pending CN116163636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211644090.9A CN116163636A (en) 2022-12-20 2022-12-20 Self-locking fireproof door of transformer substation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211644090.9A CN116163636A (en) 2022-12-20 2022-12-20 Self-locking fireproof door of transformer substation

Publications (1)

Publication Number Publication Date
CN116163636A true CN116163636A (en) 2023-05-26

Family

ID=86410357

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211644090.9A Pending CN116163636A (en) 2022-12-20 2022-12-20 Self-locking fireproof door of transformer substation

Country Status (1)

Country Link
CN (1) CN116163636A (en)

Similar Documents

Publication Publication Date Title
CN202026018U (en) Handcart interlocking centrally-installed switch cabinet
CN116163636A (en) Self-locking fireproof door of transformer substation
CN201877691U (en) Switch cabinet
CA3099941C (en) Refractory enclosures for high density energy storage systems
CN206976835U (en) A kind of sandwich IAC level high-tension switch cabinet bodies
CN201243170Y (en) Central-positioned switch cabinet
CN221177523U (en) Fireproof partition structure of converter and converter
CN209896484U (en) Explosion-proof switch cabinet
KR200295391Y1 (en) Insulated panel of incombustible resin of cubicle for receiving and distributing electricity equipment
CN216360969U (en) Dual-purpose door for safe escape and equipment installation
CN215888680U (en) Fireproof and explosion-proof blocking structure for converter transformer sleeve entering valve hall
CN112186521A (en) High-low voltage power distribution cabinet with explosion-proof flame retardant structure
CN220401238U (en) Sound-insulation heat-insulation type anti-seismic box-type transformer substation
CN111456483A (en) Fireproof plugging reinforcing structure
CN220934705U (en) Preassembled box-type transformer substation
CN211045982U (en) Ring main unit cable chamber and ring main unit
CN213212710U (en) Cabinet door, electric cabinet box and switch cabinet
CN211908055U (en) Explosion-proof drawer type low-voltage switchgear
CN219420072U (en) Intelligent new forms of energy is box-type substation for charging station
CN215646122U (en) Cable joint explosion-proof device
CN219779518U (en) Noise reduction and heat insulation box structure
CN216649031U (en) Outdoor box-type substation
CN212085636U (en) Box-type substation
CN211266160U (en) Power supply with lightning protection box
CN212323460U (en) Assembled switch cabinet

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination