Main transformer noise reduction firewall and construction method thereof

Abstract

The invention discloses a main transformer noise reduction firewall and a construction method thereof.The main transformer noise reduction firewall comprises at least two wall bodies which are used for reducing noise transmitted from a main transformer and can also be used for blocking fire spreading at the main transformer; the first H-shaped steel column and the adjustable steel column are arranged on the two sides of the wall bodies in a spliced mode and used for being matched with the wall bodies to be installed and fixed, and the wall bodies are sequentially arranged between the first H-shaped steel column and the adjustable steel column from top to bottom; a circular steel column is fixedly arranged on the top of the corresponding wall body, and connecting assemblies are arranged on the circular steel column and the bottom of the corresponding wall body. The splicing process is convenient to operate, layer-by-layer assembly of the wall body can be rapidly and effectively completed, the construction efficiency is effectively improved, in addition, the firewall is simple in structural design, high in part adaptability, free of complex construction technology and equipment, convenient to assemble, controllable in cost and suitable for transformer substation site construction scenes, and the construction efficiency is improved. And later maintenance and part replacement are facilitated.

Description

Technical Field

[0001] This invention relates to the field of firewall technology, and in particular to a main transformer noise reduction firewall and its construction method. Background Technology

[0002] Substations, as core hubs for power transmission, are widely distributed today. The main transformer, a core piece of equipment in a substation, generates continuous noise during operation. Furthermore, malfunctions in the main transformer pose a fire hazard, and a fire can easily spread. Therefore, firewalls with noise reduction functions are typically installed around the main transformer for protection. Existing conventional main transformer firewalls mostly use fixed reinforced concrete structures or are formed by splicing ordinary panels with fixed steel columns. These walls only provide basic fireproofing, and some noise-reducing firewalls only achieve basic sound insulation with simple panels. However, these firewalls are either constructed using on-site casting, a cumbersome and time-consuming process, or prefabricated wall panels, which, due to their large area and weight, require hoisting equipment for on-site assembly, making alignment and assembly extremely inconvenient. Furthermore, the lack of convenient positioning and splicing structures hinders efficient construction and fails to meet the dual requirements of fire prevention, noise reduction, and rapid assembly. Therefore, designing a wall structure that is structurally simple and can be efficiently assembled on-site is a problem that needs to be solved by those in this field. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings mentioned above by providing a main transformer noise reduction firewall and its construction method, which achieves a simple structure and can be efficiently assembled and constructed on-site.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a main transformer noise reduction firewall, comprising: At least two walls, which are used to reduce noise from the main transformer and also to prevent the spread of fire from the main transformer. The first H-shaped steel column and the adjustable steel column are respectively spliced ​​on both sides of the wall and are used to cooperate with the wall installation and fixation. Each wall is arranged between the first H-shaped steel column and the adjustable steel column from top to bottom. A circular steel column is fixedly installed at the top of the wall, and a connecting component is provided at the bottom of the wall. The connecting component enables two adjacent walls to be spliced ​​together.

[0005] Furthermore, the wall includes a first outer wall and a second outer wall. The second outer wall has multiple perforations. An installation sleeve is provided between the first outer wall and the second outer wall, and the installation sleeve has a corresponding cavity. A sound-absorbing panel is provided in the cavity, and the outer width of the sound-absorbing panel is smaller than the inner width of the cavity. The top and bottom of the mounting sleeve are respectively concave and convex.

[0006] Furthermore, the connecting assembly includes a first connecting sleeve rotatably mounted on the corresponding circular steel column, the first connecting sleeve having a connecting pin arranged laterally, and a second connecting sleeve embedded in the bottom wall of the corresponding mounting sleeve and the sound-absorbing plate, the inner wall of the second connecting sleeve having a threaded groove that slides with the connecting pin.

[0007] Furthermore, both the circular steel column and the first connecting sleeve are provided with rope-threading holes that can overlap with each other.

[0008] Furthermore, the adjustable steel column includes a second H-shaped steel column, and U-shaped steel columns are slidably provided on both sides of the second H-shaped steel column. The U-shaped steel columns can be engaged with the wall. A sliding groove is provided on the U-shaped steel column along its sliding direction, and an anti-detachment pin that can be slidably inserted into the sliding groove is provided on the inner wall of the second H-shaped steel column. It also includes a displacement adjustment component, which can drive the second H-shaped steel column to move along the setting direction of the slide groove, and make the adjustable steel column cooperate with the first H-shaped steel column to limit the wall.

[0009] Furthermore, the displacement adjustment assembly includes two slidable abutment blocks disposed within the second H-shaped steel column. The abutment blocks have an inclined surface on the side near the wall. A storage sleeve is provided on the second H-shaped steel column. The abutment blocks can penetrate the second H-shaped steel column and slide into the storage sleeve. A threaded column is rotatably provided on the storage sleeve. The threaded column has two external threads with opposite directions. The two external threads of the threaded column are respectively screwed into the two abutment blocks. Rotating the threaded column can cause the two abutting blocks to slide closer to or further apart from each other.

[0010] A method for constructing a main transformer noise reduction firewall includes the following steps: S1. On-site positioning and layout, fix and install the first H-shaped steel column according to the design dimensions, and lay out adjustable steel columns corresponding to the first H-shaped steel column to ensure that the axes of the two columns are parallel, thus completing the initial positioning of the columns; S2. Operate the displacement adjustment component, rotate the threaded column, drive the two contact blocks to slide along the storage sleeve and move away from each other, drive the U-shaped steel column to slide along the groove of the second H-shaped steel column, adjust the distance between the adjustable steel column and the first H-shaped steel column, adapt to the wall width and fix it. S3. Use hoisting equipment to lift the corresponding wall, so that the two sides of the wall are correspondingly engaged with the U-shaped steel columns of the first H-shaped steel column and the adjustable steel column, and lay the bottom wall from top to bottom between the two columns to complete the initial fixation of the bottom wall. S4. Lift the subsequent wall section and connect the upper and lower walls using the connecting components: Align the connecting pin with the first end of the threaded groove, lower the upper wall section, and slide the connecting pin along the threaded groove to rotate the first connecting sleeve, so that the first connecting sleeve is screwed into the second connecting sleeve to complete the fixing of the upper and lower walls. S5. Repeat step S4 to assemble multiple layers of walls in sequence. After each layer is assembled, the circular steel column at the top of the lower layer wall is inserted into the top of the upper layer wall to achieve positioning in conjunction with the first H-shaped steel column and the adjustable steel column. S6. After the wall assembly is completed, rotate the threaded column again to drive the two contact blocks to approach each other and abut against the U-shaped steel column, lock the adjustable steel column, and make the two columns together limit and fix the wall. S7. After the position of the U-shaped steel column is fixed, if there is a gap between it and the second H-shaped steel column, fill the gap with suitable material. S8. Conduct an installation and acceptance inspection of the overall firewall structure. Once the inspection is passed, the construction is completed.

[0011] The beneficial effects of this invention are reflected in: In this invention, the wall structure combines noise reduction and fire prevention functions, effectively reducing noise transmitted during the operation of the main transformer and reliably preventing the spread of fire at the main transformer location. The first H-shaped steel column and the adjustable steel column effectively fix the wall structure spliced ​​from top to bottom. Furthermore, the circular steel column on the lower wall and the connecting components on the upper wall work together to achieve precise splicing of adjacent walls. This splicing process is convenient and allows for quick and efficient layer-by-layer wall assembly, significantly improving construction efficiency. In addition, this firewall has a simple structural design, highly adaptable components, requires no complex construction processes or equipment, is easy to assemble, and has controllable costs. It is suitable for substation site construction scenarios and facilitates later maintenance and component replacement. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention; Figure 2 This is a structural cross-sectional view of the wall in this invention; Figure 3 In this invention Figure 2 A magnified view of part A shown; Figure 4 This is a schematic diagram illustrating the assembly of the wall and the adjustable steel column in this invention; Figure 5 In this invention Figure 4 A magnified view of part B shown.

[0013] In the picture: 1. Wall; 101. First exterior wall; 102. Second exterior wall; 103. Perforation; 104. Mounting sleeve; 105. Sound-absorbing panel; 2. First H-shaped steel column; 3. Adjustable steel column; 301. Second H-shaped steel column; 302. U-shaped steel column; 303. Slide groove; 4. Circular steel column; 5. Connecting assembly; 501. First connecting sleeve; 502. Connecting pin; 503. Second connecting sleeve; 504. Threaded groove; 505. Rope hole; 6. Displacement adjustment assembly; 601. Abutment block; 602. Storage sleeve; 603. Threaded column. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1-5 The present invention discloses a main transformer noise reduction firewall, including at least two walls 1, which are used to reduce the noise transmitted from the main transformer and can also be used to block the spread of fire at the main transformer. First H-shaped steel columns 2 and adjustable steel columns 3 are spliced ​​on both sides of the wall 1, and each wall 1 is arranged between the first H-shaped steel columns 2 and the adjustable steel columns 3 from top to bottom.

[0016] In one embodiment, a circular steel column 4 is fixedly installed on the top of the corresponding wall 1, and a connecting component 5 is provided on the circular steel column 4 and the bottom of the corresponding wall 1. The connecting component 5 enables two adjacent walls 1 to be spliced ​​together.

[0017] In practice, the wall 1 serves both noise reduction and fire-resistant functions, effectively reducing noise transmitted during the operation of the main transformer and reliably preventing the spread of fire at the main transformer. The first H-shaped steel column 2 and the adjustable steel column 3 effectively fix the wall 1 spliced ​​from top to bottom. Meanwhile, the circular steel column 4 on the lower wall 1 cooperates with the connecting component 5 on the upper wall 1, enabling precise splicing of adjacent walls 1. This splicing process is convenient and allows for quick and efficient layer-by-layer assembly of the wall 1, significantly improving construction efficiency. Furthermore, the firewall has a simple structural design, strong component compatibility, requires no complex construction processes or equipment, is easy to assemble, and has controllable costs. It is suitable for substation site construction scenarios and facilitates later maintenance and component replacement.

[0018] In one embodiment, the wall 1 includes a first outer wall 101 and a second outer wall 102. The second outer wall 102 has a plurality of through holes 103. An installation sleeve 104 is installed between the first outer wall 101 and the second outer wall 102. The installation sleeve 104 has a corresponding cavity. A sound-absorbing panel 105 is installed in the cavity. The outer width of the sound-absorbing panel 105 is smaller than the inner width of the cavity.

[0019] In specific implementation, the second outer wall 102 faces the main transformer. When in use, it can work with the cavity in the mounting sleeve 104 and the sound-absorbing panel 105 to reduce the noise generated by the main transformer. The first outer wall 101, the second outer wall 102 and the mounting sleeve 104 can all be made of fireproof cement-based composite material with steel reinforcement. The circular steel column 4 can be a section of the steel reinforcement in the mounting sleeve 104, and it is prefabricated in the corresponding factory and can be assembled when needed. The wall 1 with noise reduction and fireproof functions mentioned above is common knowledge in the field, so its specific structural composition and working principle will not be described in detail in this article.

[0020] The top and bottom of the mounting sleeve 104 are concave and convex respectively. This design allows two adjacent walls 1 to be assembled through the concave and convex parts of the mounting sleeve 104. Together with its two first H-shaped steel columns 2 and adjustable steel columns 3, it can ensure good structural stability after assembly.

[0021] In one embodiment, the connecting assembly 5 includes a first connecting sleeve 501 rotatably mounted on a corresponding circular steel column 4, a connecting pin 502 horizontally mounted on the first connecting sleeve 501, a second connecting sleeve 503 embedded in the bottom wall of the corresponding mounting sleeve 104 and the sound-absorbing plate 105, and a threaded groove 504 that slides with the connecting pin 502 on the inner wall of the second connecting sleeve 503.

[0022] In practice, the staff can select the first connecting sleeve 501 to the corresponding angle in advance. The upper wall 1 is hoisted to the top of the lower wall 1 by the hoisting equipment. At this time, the second connecting sleeve 503 on the upper wall 1 will be aligned with the first connecting sleeve 501 on the lower wall 1, and the connecting pin 502 on the first connecting sleeve 501 will be aligned with the entry end of the threaded groove 504 on the corresponding second connecting sleeve 503. Subsequently, when the upper wall 1 is lowered, the second connecting sleeve 503 on it will drive the first connecting sleeve 501 to rotate through the cooperation of the threaded groove 504 and the connecting pin 502. When it rotates, it will gradually insert into the second connecting sleeve 503. At this time, the circular steel column 4, the first connecting sleeve 501 and the second connecting sleeve 503 can ensure that the upper and lower walls 1 are spliced ​​together very stably and reliably, thereby ensuring the structural stability of its subsequent use.

[0023] In one embodiment, both the circular steel column 4 and the first connecting sleeve 501 are provided with rope-threading holes 505 that can overlap with each other.

[0024] With this design, by rotating the first connecting sleeve 501 until its rope hole 505 coincides with the circular steel column 4, the rope used for hoisting can be passed through the rope hole 505. Therefore, in conjunction with hoisting equipment, the corresponding wall 1 can be hoisted and transferred very conveniently, thereby ensuring its construction efficiency.

[0025] In one embodiment, the adjustable steel column 3 includes a second H-shaped steel column 301, and U-shaped steel columns 302 are slidably installed on both sides of the second H-shaped steel column 301. The U-shaped steel columns 302 can be engaged with the wall 1. A sliding groove 303 is provided on the U-shaped steel column 302 along its sliding direction, and an anti-detachment pin (not shown in the figure) is installed on the inner wall of the second H-shaped steel column 301 and is slidably inserted into the sliding groove 303.

[0026] In practice, when there is a gap between the prefabricated wall 1 and the adjustable steel column 3 during the actual installation process, the corresponding U-shaped steel column 302 can be slid to the corresponding position, so that the U-shaped steel column 302 can be snapped onto the side of the wall 1, thereby ensuring the flexibility of its installation.

[0027] In one embodiment, a displacement adjustment component 6 is also included. The displacement adjustment component 6 can drive the second H-shaped steel column 301 to move along the setting direction of the slide groove 303, and make the adjustable steel column 3 cooperate with the first H-shaped steel column 2 to limit the wall 1.

[0028] With this design, the U-shaped steel column 302 can be driven to slide to the corresponding position by the displacement adjustment component 6, and when the U-shaped steel column 302 has finished sliding, the displacement adjustment component 6 can also limit the U-shaped steel column 302 when it is stationary.

[0029] In one embodiment, the displacement adjustment assembly 6 includes two slidably mounted abutment blocks 601 inside the second H-shaped steel column 301. The abutment blocks 601 have an inclined surface on the side near the wall 1. A storage sleeve 602 is mounted on the second H-shaped steel column 301. The abutment blocks 601 can pass through the second H-shaped steel column 301 and slide into the storage sleeve 602. A threaded column 603 is rotatably mounted on the storage sleeve 602. The threaded column 603 has two external threads with opposite directions. The two external threads of the threaded column 603 are respectively screwed into the two abutment blocks 601.

[0030] In practice, by rotating the threaded column 603, the operator can drive the two contact blocks 601 to slide closer or further apart. When adjusting the displacement, the two contact blocks 601 can cooperate with the inclined surfaces on them to adjust the contact with the U-shaped steel column 302. When the threaded column 603 is not rotating, it can limit the contact blocks 601. In addition, in practice, a nut or clamp can be installed on the threaded column 603 to lock the threaded column 603 after it has been rotated, thereby further improving the limiting effect of the threaded column 603.

[0031] It should be added that after the position of the U-shaped steel column 302 is adjusted, if there is a gap of a corresponding size between it and the second H-shaped steel column 301, a suitable material can be filled into the gap. The material can be fireproof filler or cement.

[0032] In one embodiment, a method for constructing a main transformer noise reduction firewall is also included, comprising the following steps: S1. On-site positioning and layout, fix and install the first H-shaped steel column 2 according to the design dimensions, and lay out the adjustable steel column 3 corresponding to the first H-shaped steel column 2 to ensure that the axes of the two columns are parallel, and complete the initial positioning of the columns; S2. Operate the displacement adjustment component 6, rotate the threaded column 603, drive the two abutting blocks 601 to slide along the storage sleeve 602 and move away from each other, drive the U-shaped steel column 302 to slide along the slide groove 303 of the second H-shaped steel column 301, adjust the distance between the adjustable steel column 3 and the first H-shaped steel column 2, adapt to the width of the wall 1 and fix it. S3. Use hoisting equipment to lift the corresponding wall 1, so that the two sides of the wall 1 are correspondingly engaged with the U-shaped steel columns 302 of the first H-shaped steel column 2 and the adjustable steel column 3, and lay the bottom wall 1 from top to bottom between the two columns to complete the initial fixing of the bottom wall 1. S4. Lift the subsequent wall 1 and connect the upper and lower walls 1 through the connecting component 5: Align the connecting pin 502 with the first end of the threaded groove 504, lower the upper wall 1, and slide the connecting pin 502 along the threaded groove 504 and drive the first connecting sleeve 501 to rotate, so that the first connecting sleeve 501 is screwed into the second connecting sleeve 503, thus completing the fixing of the upper and lower walls 1. S5. Repeat step S4 to assemble the multi-layer wall 1 in sequence. After each layer is assembled, the circular steel column 4 at the top of the lower wall 1 is inserted into the top of the upper wall 1 to achieve positioning in conjunction with the first H-shaped steel column 2 and the adjustable steel column 3. S6. After the wall 1 is assembled, rotate the threaded column 603 again to drive the two contact blocks 601 to approach each other and contact the U-shaped steel column 302, lock the adjustable steel column 3, so that the two columns together limit and fix the wall 1. S7. After the position of the U-shaped steel column 302 is fixed, if there is a gap between it and the second H-shaped steel column 301, fill the gap with suitable material. S8. Conduct an installation and acceptance inspection of the overall firewall structure. Once the inspection is passed, the construction is completed.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Additionally, "multiple" refers to two or more.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 main-transformer noise reduction firewall, characterized in that, include: At least two walls (1) are used to reduce noise from the main transformer and to prevent the spread of fire at the main transformer. The first H-shaped steel column (2) and the adjustable steel column (3) are respectively spliced ​​on both sides of the wall (1) and are used to cooperate with the wall (1) for installation and fixation. Each of the walls (1) is arranged between the first H-shaped steel column (2) and the adjustable steel column (3) from top to bottom. A circular steel column (4) is fixedly installed on the top of the wall (1), and a connecting component (5) is provided on the circular steel column (4) and the bottom of the wall (1). The connecting component (5) enables two adjacent walls (1) to be spliced ​​together.

2. The main transformer noise reduction firewall and its construction method according to claim 1, characterized in that: The wall (1) includes a first outer wall (101) and a second outer wall (102). The second outer wall (102) has multiple perforations (103). An installation sleeve (104) is provided between the first outer wall (101) and the second outer wall (102). The installation sleeve (104) has a corresponding cavity. A sound-absorbing panel (105) is provided in the cavity. The outer width of the sound-absorbing panel (105) is smaller than the inner width of the cavity. The top and bottom of the mounting sleeve (104) are respectively concave and convex.

3. The main transformer noise reduction firewall and its construction method according to claim 2, characterized in that: The connecting assembly (5) includes a first connecting sleeve (501) rotatably disposed on the corresponding circular steel column (4), a connecting pin (502) is provided laterally on the first connecting sleeve (501), and a second connecting sleeve (503) is embedded in the bottom wall of the corresponding mounting sleeve (104) and the sound-absorbing plate (105), and a threaded groove (504) is provided on the inner wall of the second connecting sleeve (503) to slide with the connecting pin (502).

4. The main transformer noise reduction firewall and its construction method according to claim 3, characterized in that: Both the circular steel column (4) and the first connecting sleeve (501) are provided with rope holes (505) that can overlap with each other.

5. The main transformer noise reduction firewall and its construction method according to claim 1, characterized in that: The adjustable steel column (3) includes a second H-shaped steel column (301), and U-shaped steel columns (302) are slidably provided on both sides of the second H-shaped steel column (301). The U-shaped steel column (302) can be engaged with the wall (1). A sliding groove (303) is provided on the U-shaped steel column (302) along its sliding direction. An anti-detachment pin that can be slidably inserted into the sliding groove (303) is provided on the inner wall of the second H-shaped steel column (301). It also includes a displacement adjustment component (6), which can drive the second H-shaped steel column (301) to move along the setting direction of the slide (303) and make the adjustable steel column (3) cooperate with the first H-shaped steel column (2) to limit the wall (1).

6. The main transformer noise reduction firewall and its construction method according to claim 5, characterized in that: The displacement adjustment assembly (6) includes two slidable abutment blocks (601) disposed inside the second H-shaped steel column (301). The abutment block (601) has an inclined surface on the side near the wall (1). A storage sleeve (602) is provided on the second H-shaped steel column (301). The abutment block (601) can penetrate the second H-shaped steel column (301) and slide into the storage sleeve (602). A threaded column (603) is rotatably provided on the storage sleeve (602). The threaded column (603) has two external threads with opposite directions. The two external threads of the threaded column (603) are respectively screwed into the two abutment blocks (601). Rotating the threaded column (603) can cause the two abutting blocks (601) to slide closer to or further apart from each other.

7. A method for constructing a transformer noise reduction firewall, comprising the transformer noise reduction firewall as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. On-site positioning and layout, fix and install the first H-shaped steel column (2) according to the design dimensions, and lay out the adjustable steel column (3) corresponding to the first H-shaped steel column (2) to ensure that the axes of the two columns are parallel and complete the initial positioning of the columns; S2. Operate the displacement adjustment component (6), rotate the threaded column (603), drive the two abutting blocks (601) to slide along the storage sleeve (602) and move away from each other, drive the U-shaped steel column (302) to slide along the groove (303) of the second H-shaped steel column (301), adjust the distance between the adjustable steel column (3) and the first H-shaped steel column (2), adapt to the width of the wall (1) and fix it; S3. Use hoisting equipment to lift the corresponding wall (1) so that the two sides of the wall (1) are correspondingly connected to the U-shaped steel column (302) of the first H-shaped steel column (2) and the adjustable steel column (3), and the bottom wall (1) is laid from top to bottom between the two columns to complete the initial fixing of the bottom wall (1). S4. Lift the subsequent wall (1) and connect the upper and lower walls (1) using the connecting component (5): Align the connecting pin (502) with the first end of the threaded groove (504), lower the upper wall (1), and slide the connecting pin (502) along the threaded groove (504) to drive the first connecting sleeve (501) to rotate, so that the first connecting sleeve (501) is screwed into the second connecting sleeve (503) to complete the fixing of the upper and lower walls (1); S5. Repeat step S4 to assemble the multi-layer wall (1) in sequence. After each layer is assembled, the circular steel column (4) at the top of the lower wall (1) is inserted into the top of the upper wall (1) to achieve positioning in conjunction with the first H-shaped steel column (2) and the adjustable steel column (3). S6. After the wall (1) is assembled, rotate the threaded column (603) again to drive the two abutting blocks (601) to approach each other and abut against the U-shaped steel column (302), lock the adjustable steel column (3), so that the two columns together limit and fix the wall (1); S7. After the position of the U-shaped steel column (302) is fixed, if there is a gap between it and the second H-shaped steel column (301), fill the gap with suitable material. S8. Conduct an installation and acceptance inspection of the overall firewall structure. Once the inspection is passed, the construction is completed.

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