Fireproof wall for steel structure building of transformer substation

Abstract

The utility model discloses a kind of steel structure building outer envelope fireproof walls of transformer substation, including air entrainment concrete block wall body, rock wool insulation board and outer decorative board being sequentially arranged along steel structure frame outside side;The air entrainment concrete block wall body is close to steel structure frame outside side masonry;The air entrainment concrete block wall body is masonry on steel structure cast-in-situ reinforced concrete foundation link beam;The setting range of air entrainment concrete block wall body is same with fireproof wall range, and the wall of air entrainment concrete block wall body is close to steel structure frame outer envelope wall masonry;By being designed as the mode that air entrainment concrete block wall body outer stick rock wool insulation layer and outer decorative board composite wall body for steel structure building outer envelope fireproof wall of transformer substation, to solve the problem that steel structure building outer envelope wall body fireproof wall fire resistance limit time cannot reach 3.0h and above, and overall coordination of building appearance is also considered.

Description

Technical Field

[0001] This utility model relates to the field of power engineering design and construction technology, and in particular to a fire wall for the outer enclosure of a steel structure building in a substation. Background Technology

[0002] According to the "General Design Requirements for Transmission and Transformation Projects of State Grid Corporation of China," buildings within substations generally require the use of steel structures. Steel structure buildings use a steel frame or portal frame structure as the skeleton, with steel purlins installed on the outside of steel columns and beams. Lightweight external wall cladding and a lightweight roof are then constructed using these purlins as the framework. The lightweight external wall cladding is categorized based on the position of the steel purlins within the wall: lightweight external wall cladding with steel purlins sandwiched between steel structures, and lightweight external wall cladding with steel purlins hanging externally on the outside of steel structures.

[0003] Lightweight external wall cladding for steel structure buildings using steel purlins typically consists of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool or glass wool sandwiched in between. Figure 1 Lightweight exterior wall cladding for steel structure buildings, typically using an external cladding method for steel purlins, generally consists of an integrated composite wall panel (composed of two layers of metal panels or two layers of cement fiberboard with a composite rock wool or glass wool layer in between) attached to the outside of the steel purlins. Figure 2 ).

[0004] Due to limitations in land availability, the fire separation distance between steel structure buildings within a substation or between steel structure buildings and oil-containing electrical equipment such as oil-immersed transformers and oil-immersed reactors is often less than 10 meters. This does not meet the requirement of Article 11.1.5 of the "Fire Protection Design Standard for Thermal Power Plants and Substations" GB50229-2019, which stipulates that the fire separation distance between Class C, D, and E production buildings and oil-immersed transformers and oil-immersed reactors or between buildings within a substation should be ≥10 meters. Therefore, it is necessary to convert the lightweight outer enclosure of the steel structure buildings into firewalls.

[0005] The definition of a firewall in Article 6.1.1 of the Code for Fire Protection Design of Buildings GB50016-2014 (2018 edition) is: Firewalls should be directly installed on the foundation or load-bearing structure such as frame or beam of the building, and the fire resistance rating of the load-bearing structure such as frame or beam should not be lower than the fire resistance rating time of the firewall.

[0006] The definition of a firewall in Article 6.1.1 of the "General Code for Fire Protection of Buildings" GB55037-2022 is as follows: A firewall should be directly installed on the foundation of the building or on a load-bearing structure such as a frame or beam with an appropriate fire resistance rating, and should extend from the floor slab to the bottom surface of the structural beam, floor slab, or roof slab. At the intersection of the firewall and the building's exterior walls or roof, and at any openings such as doors and windows on the firewall, measures should be taken to prevent the spread of fire to the other side of the firewall.

[0007] The above two specifications specify the location of firewalls. Firewalls must also have good stability. Article 6.1.2 of the "General Code for Fire Protection of Buildings" GB55037-2022 requires that when the building structure or components or objects on any side of the firewall are damaged or collapsed by fire and affect the firewall, the firewall should still be able to prevent the fire from spreading to the other side of the firewall.

[0008] Firewalls must also have good fire resistance time and heat insulation performance. Article 6.1.3 of the "General Code for Fire Protection of Buildings" GB55037-2022 stipulates that the fire resistance rating of firewalls should not be less than 3.00h. The fire resistance rating of firewalls in Class A and B factories and Class A, B, and C warehouses should not be less than 4.00h.

[0009] In summary, firewalls have the following three key characteristics: 1) Firewalls should be installed directly on the building's load-bearing structure, extending from the floor to the bottom of the roof slab.

[0010] 2) The firewall should be stable on its own. If the building structure, components or objects on any side are damaged or collapse due to fire and affect the firewall, it should still be able to prevent the fire from spreading to the other side of the firewall.

[0011] 3) The fire resistance rating of firewalls shall not be less than 3.00h. The fire resistance rating of firewalls in Class A and B factories and Class A, B, and C warehouses shall not be less than 4.00h.

[0012] From the perspective of the structural layers of lightweight exterior walls of steel structure buildings, which consist of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool or glass wool sandwiched in between, the fire resistance limit can theoretically reach 3.0h-4.0h or more in laboratory tests by increasing the thickness of the inner and outer panels and the core rock wool.

[0013] In past practical engineering applications, there have also been so-called "lightweight firewalls" that only meet the theoretical fire resistance limit time requirements. Their fire resistance limit time is affected by factors such as the density of the sandwich material used, the compactness of the filling during installation, the firmness of the installation, the thickness of the boards from different manufacturers, and the differences in fire resistance limits. As a result, their overall fire resistance limit time also varies greatly.

[0014] In practical engineering applications, regardless of whether such firewalls meet the fire resistance time requirements stipulated in the "Code for Fire Protection Design of Buildings" and the "General Code for Fire Protection of Buildings," in the event of a fire, the lightweight external enclosure of steel structure buildings quickly loses its stability under the action of high-pressure water jets during fire rescue, or under the lateral force of damaged structures or adjacent collapsed objects, and cannot effectively prevent the spread of fire.

[0015] Therefore, in practical engineering, lightweight external enclosure walls of steel structure buildings are acceptable as lightweight perimeter walls, but they are insufficient to meet the heavy responsibility of firewalls, and the use of such "lightweight firewalls" should be prohibited. Utility Model Content

[0016] The purpose of this utility model is to solve the problems of the prior art and provide a firewall for the outer enclosure of a steel structure building in a substation.

[0017] The purpose of this utility model is achieved through the following technical solution: a fire wall for the outer enclosure of a steel structure building of a substation, comprising an aerated concrete block wall, a rock wool insulation board and an outer decorative panel arranged sequentially along the outside of the steel structure frame; the aerated concrete block wall is built close to the outside of the steel structure frame; the aerated concrete block wall is built on the connecting beam of the cast-in-place reinforced concrete foundation of the steel structure. In this utility model, the steel purlins within the firewall range on the side of the steel structure building near the oil-containing electrical equipment are eliminated. When the firewall of this utility model is not installed, the lightweight external enclosure wall of the steel structure building is composed of steel purlins as the keel, and a structural layer consisting of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool board or glass wool sandwiched in between. This utility model uses aerated concrete block walls, rock wool insulation boards and external decorative panels to form a firewall. The installation range of the aerated concrete block walls is the same as the firewall range, and the walls of the aerated concrete block walls are built tightly against the outer enclosure wall of the steel structure frame. By designing the outer enclosure firewall of the substation steel structure building as a composite wall of aerated concrete block walls with an external rock wool insulation layer and an external decorative panel, the problem that the fire resistance limit of the outer enclosure firewall of the steel structure building cannot reach 3.0h or more is solved, while taking into account the overall coordination of the building appearance. An autoclaved aerated concrete (AAC) brick masonry wall is also built on the steel structure cast-in-place reinforced concrete foundation connecting beam; the height of the AAC brick masonry wall is flush with the indoor ground level; the aerated concrete block wall is built on the AAC brick masonry wall; because the height difference between indoor and outdoor areas easily generates moisture, the aerated concrete block wall is prone to dampness, so the aerated concrete block wall is only built after the AAC brick masonry wall reaches the indoor ground level. The aerated concrete block wall is equipped with structural columns and cast-in-place reinforced concrete ring beams; the structural columns and cast-in-place reinforced concrete ring beams help to ensure seismic resistance requirements. The thickness of the aerated concrete block wall is 200-300mm; the appropriate thickness of the aerated concrete block wall helps to ensure that the fire resistance limit of the fire wall reaches more than 3.0h. The rock wool insulation board is bonded to the outside of the aerated concrete block wall, and the rock wool insulation board and the aerated concrete block wall are also fixed by anchor bolts; the bonding and anchoring method is adopted. During bonding, the adhesive is fully bonded to the rock wool board. Bonding helps to improve the tightness of the fit, and anchoring helps to improve the stability of the connection. The thickness of the rock wool insulation board is 80-120mm; the main purpose of the rock wool insulation board is to improve the insulation performance, and using an appropriate thickness is beneficial to ensuring the insulation performance. A further technical solution is that the exterior decorative panel uses the same non-combustible metal material or cement sandwich panel as the outer wall of the steel structure building; the material selection of the exterior decorative panel is to maintain the integrity of the building's appearance, and the same material is used for the exterior decorative surface layer; The aerated concrete block wall is fixed to a steel keel by expansion bolts; the exterior decorative panel is fixedly connected to the steel keel.

[0018] This utility model has the following advantages: 1. This utility model effectively solves the fire resistance limit time of the exterior wall of the building near the oil-containing electrical equipment by constructing a firewall for the steel structure building of the substation, improves the safe operation of the substation, and achieves overall coordination of the appearance of the steel structure building. 2. By designing the fireproof wall of the substation steel structure building as a composite wall with an aerated concrete block wall covered with a rock wool insulation layer and an external decorative panel, the problem that the fireproof wall of the steel structure building cannot reach 3.0 hours or more can be solved, while taking into account the overall coordination of the building's appearance. Attached Figure Description

[0019] Figure 1 A schematic diagram of a lightweight external enclosure wall structure for steel-structured buildings using steel purlins.

[0020] Figure 2 A schematic diagram of a lightweight external enclosure wall structure with steel purlins hanging on the outside of the steel structure building.

[0021] Figure 3 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Steel frame structure; 2. Aerated concrete block wall; 3. Rock wool insulation board; 4. Exterior decorative panel; 5. Anchor bolts; 6. Steel keel; 7. Cast-in-place reinforced concrete ring beam; 8. Steel structure cast-in-place reinforced concrete foundation connecting beam; 9. Autoclaved lime-sand common brick masonry wall; 10. Indoor floor; A. Outdoor; B. Indoor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1: As Figure 3 As shown, a fire wall enclosure for a steel structure building in a substation includes an aerated concrete block wall 2, a rock wool insulation board 3, and an exterior decorative panel 4 arranged sequentially along the outside of a steel structure frame 1; the aerated concrete block wall 2 is built close to the outside of the steel structure frame 1; the aerated concrete block wall 2 is built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8. In this utility model, the steel purlins within the firewall range on the side of the steel structure building closest to the oil-containing electrical equipment are eliminated. When the firewall of this utility model is not installed, such as... Figure 1 and 2 As shown, the lightweight external enclosure of a steel structure building uses steel purlins as the keel and adopts a structural layer of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool board or glass wool sandwiched in between to form a lightweight external enclosure. This utility model uses aerated concrete block wall 2, rock wool insulation board 3 and external decorative panel 4 to form a firewall. The installation range of aerated concrete block wall 2 is the same as the firewall range, and the wall of aerated concrete block wall 2 is closely attached to the outer enclosure of the steel structure frame 1. By designing the outer enclosure firewall of the substation steel structure building as a composite wall of aerated concrete block wall 2 with rock wool insulation layer and external decorative panel 4, the problem that the fire resistance limit of the outer enclosure firewall of the steel structure building cannot reach 3.0h or more is solved, while taking into account the overall coordination of the building appearance. An autoclaved aerated concrete (AAC) brick masonry wall 9 is also built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8; the height of the AAC brick masonry wall 9 is flush with the indoor ground 10; the aerated concrete block wall 2 is built on the AAC brick masonry wall 9; because the height difference between indoor and outdoor areas easily generates moisture, the aerated concrete block wall 2 is prone to moisture, so the AAC brick masonry wall 9 is built up to the indoor ground 10 before the aerated concrete block wall 2 is built. The aerated concrete block wall 2 is equipped with structural columns and cast-in-place reinforced concrete ring beams 7; the structural columns and cast-in-place reinforced concrete ring beams 7 help to ensure seismic resistance requirements. The thickness of the aerated concrete block wall 2 is 200-300mm; the appropriate thickness of the aerated concrete block wall 2 is conducive to ensuring that the fire resistance limit of the firewall reaches more than 3.0h. The rock wool insulation board 3 is bonded to the outside of the aerated concrete block wall 2, and the rock wool insulation board 3 and the aerated concrete block wall 2 are also fixed by anchor bolts 5; the bonding and anchoring method is adopted, and the adhesive is fully bonded to the rock wool board during bonding. Bonding helps to improve the tightness of the fit, and anchoring helps to improve the stability of the connection. The thickness of the rock wool insulation board 3 is 80-120mm; the rock wool insulation board 3 is mainly used to improve the insulation performance, and using a suitable thickness is beneficial to ensuring the insulation performance. A further technical solution is that the exterior decorative panel 4 is made of the same non-combustible metal material or cement sandwich panel as the outer wall of the steel structure building; the material selection of the exterior decorative panel 4 is to maintain the integrity of the building's appearance, and the same material is used for the exterior decorative surface layer; The aerated concrete block wall 2 is fixed with steel keel 6 by expansion bolts; the exterior decorative panel 4 is fixedly connected to the steel keel 6.

[0030] Example 2: As Figure 3 As shown, a fire wall enclosure for a steel structure building in a substation includes an aerated concrete block wall 2, a rock wool insulation board 3, and an exterior decorative panel 4 arranged sequentially along the outside of a steel structure frame 1; the aerated concrete block wall 2 is built close to the outside of the steel structure frame 1; the aerated concrete block wall 2 is built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8. In this utility model, the steel purlins within the firewall range on the side of the steel structure building closest to the oil-containing electrical equipment are eliminated. When the firewall of this utility model is not installed, such as... Figure 1 and 2 As shown, the lightweight external enclosure of a steel structure building uses steel purlins as the keel and adopts a structural layer of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool board or glass wool sandwiched in between to form a lightweight external enclosure. This utility model uses aerated concrete block wall 2, rock wool insulation board 3 and external decorative panel 4 to form a firewall. The installation range of aerated concrete block wall 2 is the same as the firewall range, and the wall of aerated concrete block wall 2 is closely attached to the outer enclosure of the steel structure frame 1. By designing the outer enclosure firewall of the substation steel structure building as a composite wall of aerated concrete block wall 2 with rock wool insulation layer and external decorative panel 4, the problem that the fire resistance limit of the outer enclosure firewall of the steel structure building cannot reach 3.0h or more is solved, while taking into account the overall coordination of the building appearance. An autoclaved aerated concrete (AAC) brick masonry wall 9 is also built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8; the height of the AAC brick masonry wall 9 is flush with the indoor ground 10; the aerated concrete block wall 2 is built on the AAC brick masonry wall 9; because the height difference between indoor and outdoor areas easily generates moisture, the aerated concrete block wall 2 is prone to moisture, so the AAC brick masonry wall 9 is built up to the indoor ground 10 before the aerated concrete block wall 2 is built. The aerated concrete block wall 2 is equipped with structural columns and cast-in-place reinforced concrete ring beams 7; the structural columns and cast-in-place reinforced concrete ring beams 7 help to ensure seismic resistance requirements. The thickness of the aerated concrete block wall 2 is 200mm; the appropriate thickness of the aerated concrete block wall 2 helps to ensure that the fire resistance limit of the firewall reaches more than 3.0h. The rock wool insulation board 3 is bonded to the outside of the aerated concrete block wall 2, and the rock wool insulation board 3 and the aerated concrete block wall 2 are also fixed by anchor bolts 5; the bonding and anchoring method is adopted, and the adhesive is fully bonded to the rock wool board during bonding. Bonding helps to improve the tightness of the fit, and anchoring helps to improve the stability of the connection. The thickness of the rock wool insulation board 3 is 80mm; the main purpose of the rock wool insulation board 3 is to improve the insulation performance, and using an appropriate thickness is beneficial to ensuring the insulation performance. A further technical solution is that the exterior decorative panel 4 is made of the same non-combustible metal material or cement sandwich panel as the outer wall of the steel structure building; the material selection of the exterior decorative panel 4 is to maintain the integrity of the building's appearance, and the same material is used for the exterior decorative surface layer; The aerated concrete block wall 2 is fixed with steel keel 6 by expansion bolts; the exterior decorative panel 4 is fixedly connected to the steel keel 6.

[0031] Example 3: As Figure 3 As shown, a fire wall enclosure for a steel structure building in a substation includes an aerated concrete block wall 2, a rock wool insulation board 3, and an exterior decorative panel 4 arranged sequentially along the outside of a steel structure frame 1; the aerated concrete block wall 2 is built close to the outside of the steel structure frame 1; the aerated concrete block wall 2 is built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8. In this utility model, the steel purlins within the firewall range on the side of the steel structure building closest to the oil-containing electrical equipment are eliminated. When the firewall of this utility model is not installed, such as... Figure 1 and 2As shown, the lightweight external enclosure of a steel structure building uses steel purlins as the keel and adopts a structural layer of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool board or glass wool sandwiched in between to form a lightweight external enclosure. This utility model uses aerated concrete block wall 2, rock wool insulation board 3 and external decorative panel 4 to form a firewall. The installation range of aerated concrete block wall 2 is the same as the firewall range, and the wall of aerated concrete block wall 2 is closely attached to the outer enclosure of the steel structure frame 1. By designing the outer enclosure firewall of the substation steel structure building as a composite wall of aerated concrete block wall 2 with rock wool insulation layer and external decorative panel 4, the problem that the fire resistance limit of the outer enclosure firewall of the steel structure building cannot reach 3.0h or more is solved, while taking into account the overall coordination of the building appearance. An autoclaved aerated concrete (AAC) brick masonry wall 9 is also built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8; the height of the AAC brick masonry wall 9 is flush with the indoor ground 10; the aerated concrete block wall 2 is built on the AAC brick masonry wall 9; because the height difference between indoor and outdoor areas easily generates moisture, the aerated concrete block wall 2 is prone to moisture, so the AAC brick masonry wall 9 is built up to the indoor ground 10 before the aerated concrete block wall 2 is built. The aerated concrete block wall 2 is equipped with structural columns and cast-in-place reinforced concrete ring beams 7; the structural columns and cast-in-place reinforced concrete ring beams 7 help to ensure seismic resistance requirements. The thickness of the aerated concrete block wall 2 is 300mm; the appropriate thickness of the aerated concrete block wall 2 helps to ensure that the fire resistance limit of the firewall reaches more than 3.0h. The rock wool insulation board 3 is bonded to the outside of the aerated concrete block wall 2, and the rock wool insulation board 3 and the aerated concrete block wall 2 are also fixed by anchor bolts 5; the bonding and anchoring method is adopted, and the adhesive is fully bonded to the rock wool board during bonding. Bonding helps to improve the tightness of the fit, and anchoring helps to improve the stability of the connection. The thickness of the rock wool insulation board 3 is 120mm; the rock wool insulation board 3 is mainly used to improve the insulation performance, and using an appropriate thickness is beneficial to ensuring the insulation performance. A further technical solution is that the exterior decorative panel 4 is made of the same non-combustible metal material or cement sandwich panel as the outer wall of the steel structure building; the material selection of the exterior decorative panel 4 is to maintain the integrity of the building's appearance, and the same material is used for the exterior decorative surface layer; The aerated concrete block wall 2 is fixed with steel keel 6 by expansion bolts; the exterior decorative panel 4 is fixedly connected to the steel keel 6.

[0032] Example 4: Figure 3As shown, a fire wall enclosure for a steel structure building in a substation includes an aerated concrete block wall 2, a rock wool insulation board 3, and an exterior decorative panel 4 arranged sequentially along the outside of a steel structure frame 1; the aerated concrete block wall 2 is built close to the outside of the steel structure frame 1; the aerated concrete block wall 2 is built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8. In this utility model, the steel purlins within the firewall range on the side of the steel structure building closest to the oil-containing electrical equipment are eliminated. When the firewall of this utility model is not installed, such as... Figure 1 and 2 As shown, the lightweight external enclosure of a steel structure building uses steel purlins as the keel and adopts a structural layer of two layers of metal sandwich panels or two layers of cement sandwich panels with rock wool board or glass wool sandwiched in between to form a lightweight external enclosure. This utility model uses aerated concrete block wall 2, rock wool insulation board 3 and external decorative panel 4 to form a firewall. The installation range of aerated concrete block wall 2 is the same as the firewall range, and the wall of aerated concrete block wall 2 is closely attached to the outer enclosure of the steel structure frame 1. By designing the outer enclosure firewall of the substation steel structure building as a composite wall of aerated concrete block wall 2 with rock wool insulation layer and external decorative panel 4, the problem that the fire resistance limit of the outer enclosure firewall of the steel structure building cannot reach 3.0h or more is solved, while taking into account the overall coordination of the building appearance. An autoclaved aerated concrete (AAC) brick masonry wall 9 is also built on the steel structure cast-in-place reinforced concrete foundation connecting beam 8; the height of the AAC brick masonry wall 9 is flush with the indoor ground 10; the aerated concrete block wall 2 is built on the AAC brick masonry wall 9; because the height difference between indoor and outdoor areas easily generates moisture, the aerated concrete block wall 2 is prone to moisture, so the AAC brick masonry wall 9 is built up to the indoor ground 10 before the aerated concrete block wall 2 is built. The aerated concrete block wall 2 is equipped with structural columns and cast-in-place reinforced concrete ring beams 7; the structural columns and cast-in-place reinforced concrete ring beams 7 help to ensure seismic resistance requirements. The thickness of the aerated concrete block wall 2 is 250mm; the appropriate thickness of the aerated concrete block wall 2 helps to ensure that the fire resistance limit of the firewall reaches more than 3.0h. The rock wool insulation board 3 is bonded to the outside of the aerated concrete block wall 2, and the rock wool insulation board 3 and the aerated concrete block wall 2 are also fixed by anchor bolts 5; the bonding and anchoring method is adopted, and the adhesive is fully bonded to the rock wool board during bonding. Bonding helps to improve the tightness of the fit, and anchoring helps to improve the stability of the connection. The thickness of the rock wool insulation board 3 is 100mm; the rock wool insulation board 3 is mainly used to improve the insulation performance, and using an appropriate thickness is beneficial to ensuring the insulation performance. A further technical solution is that the exterior decorative panel 4 is made of the same non-combustible metal material or cement sandwich panel as the outer wall of the steel structure building; the material selection of the exterior decorative panel 4 is to maintain the integrity of the building's appearance, and the same material is used for the exterior decorative surface layer; The aerated concrete block wall 2 is fixed with steel keel 6 by expansion bolts; the exterior decorative panel 4 is fixedly connected to the steel keel 6.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fireproof wall for the outer enclosure of a steel structure building in a substation, characterized in that: It includes an aerated concrete block wall, a rock wool insulation board, and an exterior decorative panel arranged sequentially along the outside of the steel structure frame; the aerated concrete block wall is built close to the outside of the steel structure frame; the aerated concrete block wall is built on the connecting beam of the cast-in-place reinforced concrete foundation of the steel structure.

2. The fireproof wall surrounding the steel structure building of the substation according to claim 1, characterized in that: The steel structure cast-in-place reinforced concrete foundation connecting beam is also covered with an autoclaved lime-sand common brick masonry wall; the height of the autoclaved lime-sand common brick masonry wall is flush with the indoor floor; the aerated concrete block wall is built on the autoclaved lime-sand common brick masonry wall.

3. The fireproof enclosure of the steel structure building of the substation according to claim 1, characterized in that: The aerated concrete block wall is equipped with structural columns and cast-in-place reinforced concrete ring beams.

4. The fireproof wall surrounding the steel structure building of the substation according to claim 1, characterized in that: The thickness of the aerated concrete block wall is 200-300 mm.

5. The fireproof wall surrounding the steel structure building of a substation according to claim 1, characterized in that: The rock wool insulation board is bonded to the outside of the aerated concrete block wall, and the rock wool insulation board and the aerated concrete block wall are also fixed together by anchor bolts.

6. The fireproof wall surrounding the steel structure building of a substation according to claim 1, characterized in that: The thickness of the rock wool insulation board is 80-120mm.

7. The fireproof wall surrounding the steel structure building of a substation according to claim 1, characterized in that: The exterior decorative panels are made of the same non-combustible metal materials or cement sandwich panels as the outer walls of steel structure buildings.

8. The fireproof wall surrounding the steel structure building of a substation according to claim 1, characterized in that: The aerated concrete block wall is fixed to a steel keel by expansion bolts; the exterior decorative panel is fixedly connected to the steel keel.

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