A structure for fire protection of steel columns

Abstract

The present application discloses a structure for fire protection of steel columns, which includes partitions, purlins, inner rock wool boards and fireproof boards. The partitions are connected in each groove, and each groove is divided into a plurality of chambers arranged along the length direction of the steel column. The purlins are connected around the steel column and connected to the partitions. The inner rock wool boards are filled in each chamber. The fireproof board is wrapped around the steel column and connected to the purlins. In the technical solution of the present application, the fire protection of the steel column is completed by the fireproof board, which solves the problem that the implementation conditions required for applying thick fire-retardant coatings cannot be met in the low temperature and harsh environment in winter. At the same time, the fireproof board realizes the standardization of all components, and the processing and installation quality is easier to guarantee. The fireproof board is dry-assembled and meets the construction standardization requirements. The fireproof board is more solid and safe, with a smooth appearance and better visual effect.

Description

Technical Field

[0001] The present application relates to the field of construction, and in particular to a structure for fire protection of steel columns. Background Art

[0002] The valve hall steel structure of the UHV DC transmission project must adopt fire protection measures to meet the building fire protection requirements. The fire hazard classification of the valve hall is Class D, and the fire resistance level is Class II. According to the provisions of the "Code for Fire Protection Design of Buildings" GB50016, actual projects generally use fire retardant coatings of different thicknesses in different parts to meet the steel structure fire protection requirements.

[0003] The fire retardant coating of the steel column adopts thick coating type. During the construction process and before the coating is dried and cured, the ambient temperature is required to be maintained at 5-38℃, the relative humidity is not more than 85%, and the air should be circulated. When the wind speed is greater than 5m / s, or when it is raining or there is condensation on the surface of the component, it is not suitable for operation. In addition, the construction of fire retardant coating involves many high-altitude operations, high requirements for personnel protection, high construction safety risks, and difficult to ensure construction quality.

[0004] According to the construction experience of many projects, winter construction conditions are often harsh and cannot meet the construction requirements of the above-mentioned thick fire retardant coatings, resulting in the inability or inconvenience of construction, which in turn affects the construction period and quality. Since the steel column is a vertical component, the paint after construction has a downward accumulation phenomenon. At the same time, the particles of the thick coating components are large, and the surface is relatively rough after completion, which does not look good.

[0005] Therefore, it is necessary to study fire protection measures for steel columns that are suitable for winter construction conditions, and to form a set of practical and effective standardized design and construction plans to solve the problems of substandard construction conditions, poor construction quality, and thick coating peeling of fire-retardant coatings for steel structures in winter. Summary of the invention

[0006] The present application provides a structure for fire protection of steel columns, which can solve the problems of substandard construction conditions, poor construction quality and shedding of thick coatings in steel structures in winter.

[0007] An embodiment of the present application provides a structure for fire protection of a steel column, wherein the steel column has a web and two wing plates, wherein the two wing plates are respectively vertically connected to opposite sides of the web and define two grooves. The structure includes a partition, a purlin, an inner rock wool board and a fireproof board. The partition is connected to each groove and divides each groove into a plurality of chambers arranged along the length direction of the steel column. The purlin is connected to the four sides of the steel column and is connected to the partition. The inner rock wool board is filled in each chamber. The fireproof board is wrapped around the four sides of the steel column and is connected to the purlin.

[0008] In some of the embodiments, the partitions include two groups, each group includes a plurality of partitions, the two groups of partitions are respectively connected in two grooves, in each group of partitions, each partition is perpendicular to the web and each wing plate, and each partition is arranged at a preset distance along the length direction of the steel column.

[0009] In some of the embodiments, the purlins include four groups, each group includes a plurality of purlins, the four groups of purlins are respectively connected around the steel column and connected to form a ring structure, in each group of purlins, each purlin is horizontally placed on the steel column, and each purlin is arranged at a preset distance along the length direction of the steel column.

[0010] In some of the embodiments, each purlin has a first slat, a second slat and a third slat, the first slat and the third slat are respectively vertically connected to the opposite sides of the second slat, the first slat is connected to the steel column, the second slat is connected to the partition, and the third slat is connected to the fireproof board.

[0011] In some embodiments, the inner rock wool boards include multiple groups, each group includes multiple rock wool boards, each group of inner rock wool boards is filled in each cavity respectively, in each group of inner rock wool boards, each inner rock wool board is stacked along the depth direction of the cavity, and the edges of each inner rock wool board are tightly pressed against the surrounding wall of the cavity.

[0012] In some of the embodiments, the structure further comprises an external rock wool board which is wrapped around the steel column and is wrapped by a fireproof board.

[0013] In some of the embodiments, the external rock wool boards include four groups, each group includes a plurality of rock wool boards, and the four groups of external rock wool boards are respectively covered around the steel columns and connected to form a ring structure. In each group of external rock wool boards, the external rock wool boards are arranged in a close fit.

[0014] In some of the embodiments, the fireproof panels include four groups, each group includes a plurality of fireproof panels, and the four groups of fireproof panels are respectively covered on all sides of the outer rock wool board and connected to form a ring structure. In each group of fireproof panels, the fireproof panels are arranged in a close fit.

[0015] In some of the embodiments, the structure further includes a corrugated steel plate, which is wrapped around the fireproof board and connected to the purlin.

[0016] In some of the embodiments, the corrugated steel plates include four groups, each group includes a plurality of corrugated steel plates, the four groups of corrugated steel plates are respectively covered around the fireproof panels and connected to form a ring structure, and in each group of corrugated steel plates, the corrugated steel plates are arranged in close proximity.

[0017] According to a structure for fire protection of steel columns provided in an embodiment of the present application, the steel column has a web and two wing plates, and the two wing plates are respectively vertically connected to the opposite sides of the web and define two grooves. The structure includes a partition, a purlin, an inner rock wool board and a fireproof board. The partition is connected to each groove and divides each groove into a plurality of chambers arranged along the length direction of the steel column. The purlin is connected to the surrounding of the steel column and is connected to the partition. The inner rock wool board is filled in each chamber. The fireproof board is wrapped around the steel column and connected to the purlin. In the technical solution of the present application, the fireproofing of the steel column is completed by the fireproof board, which solves the problem that the implementation conditions required for applying thick fireproof coatings cannot be met in the low temperature and harsh environment in winter. At the same time, the fireproof board realizes the standardization of all components, and the processing and installation quality are easier to guarantee. The fireproof board is dry-assembled and meets the construction standardization requirements. The fireproof board is more solid and safe, with a smooth appearance and better visual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a plan view of the partition and the steel column in the embodiment of the present application;

[0020] Figure 2 is an elevation view of the purlin, steel column and partition in the embodiment of the present application;

[0021] Figure 3 is a cross-sectional view of a purlin in an embodiment of the present application;

[0022] Figure 4 It is a plan view constructed in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] See also Figure 1-4The embodiment of the present application provides a structure for fire protection of a steel column 1. The steel column 1 is located on one side of an exterior wall 2. The steel column 1 has a web 10 and two wing plates 11. The middle parts of the two wing plates 11 are respectively vertically connected to the two opposite sides of the web 10 and define two grooves. The steel column 1 is specifically a columnar structure with an H-shaped cross-section. The structure includes a partition 3, a purlin 4, an inner rock wool board 5 and a fireproof board 6.

[0025] The partitions 3 are connected in each groove and divide each groove into a plurality of chambers arranged along the length direction of the steel column 1. Further, the partitions 3 include two groups, each group includes a plurality of partitions 3, and the two groups of partitions 3 are respectively connected in two grooves. In each group of partitions 3, each partition 3 is perpendicular to the web 10 and each wing 11, and is welded to the web 10 and the wing 11. Each partition 3 is arranged at a preset distance along the length direction of the steel column 1, such as at intervals of 1200 to 1500 mm, so that the partitions 3 divide each groove into a plurality of chambers arranged along the length direction of the steel column 1. The partitions 3 are steel partitions 3.

[0026] The purlins 4 are connected around the steel column 1 and connected to the partition 3. Further, the purlins 4 include four groups, each group includes a plurality of purlins, and the four groups of purlins 4 are respectively connected around the steel column 1. In each group of purlins 4, each purlin 4 is horizontally placed on the steel column 1 and welded to the steel column 1. Each purlin 4 is arranged at a preset distance along the length direction of the steel column 1, such as 1200-1500mm, so that the side of each partition 3 away from the web 10 is connected to the steel column 1 through the purlin 4, so that the partition 3 is further fixed.

[0027] Each purlin 4 has a first slat 40, a second slat 41 and a third slat 42. One side of the first slat 40 and one side of the third slat 42 are respectively vertically connected to the two sides of the second slat 42 that are oppositely arranged in the width direction, and are respectively located on the two sides of the second slat 42 that are oppositely arranged in the thickness direction. The purlin is specifically a strip structure with a Z-shaped cross-section, that is, the purlin 4 is a Z-shaped purlin 4. Among them, the first slat 40 is attached to and welded with the wing plate 11, the second slat 41 is located above the partition 3, and is attached to and welded with the partition 3, and the third slat 42 is attached to the fireproof board 6 and connected via self-tapping screws 9. The width of the first slat 40, the second slat 41 and the third slat 42 are all 50 mm, and the thickness is all 2 mm.

[0028] The inner rock wool board 5 is filled in each chamber. Further, the inner rock wool board 5 includes multiple groups, each group includes multiple, each group of inner rock wool boards 5 is filled in each chamber respectively, and connected to form a ring structure, in each group of inner rock wool boards 5, each inner rock wool board 5 is stacked along the depth direction of the chamber, and the edges of each inner rock wool board 5 are tightly pressed against the surrounding wall of the chamber. The inner rock wool board 5 is a 50mm thick rock wool board.

[0029] The structure also includes an external rock wool board 7, which is wrapped around the steel column 1 and wrapped by a fireproof board 6. Further, the external rock wool board 7 includes four groups, each group includes a plurality of external rock wool boards, and the four groups of external rock wool boards 7 are respectively covered around the steel column 1 and connected to form a ring structure. In each group of external rock wool boards 7, each external rock wool board 7 is arranged in a close fit. The external rock wool board 7 is also a 50 mm thick rock wool board.

[0030] The fireproof board 6 is wrapped around the outer rock wool board 7 and connected to the purlin 4. Further, the fireproof board 6 includes four groups, each group includes a plurality of fireproof boards 6, and the four groups of fireproof boards 6 are respectively covered around the outer rock wool board 7 and connected to form a ring structure. In each group of fireproof boards 6, each fireproof board 6 is connected to the purlin 4 by self-tapping screws 9, and each fireproof board 6 is arranged in a close fit. The fireproof board 6 is a 12mm thick fiber reinforced silicate board.

[0031] The structure also includes a corrugated steel plate 8, which is wrapped around the fireproof board 6 and connected to the purlin 4. Further, the corrugated steel plate 8 includes four groups, each group includes a plurality of corrugated steel plates 8, and the four groups of corrugated steel plates 8 are respectively covered around the fireproof board 6 and connected to form a ring structure. In each group of corrugated steel plates 8, each corrugated steel plate 8 is connected to the purlin 4 through a self-tapping screw 9, and each corrugated steel plate 8 is arranged in a close fit. The corrugated steel plate 8 is a single-layer corrugated steel plate 8 with a thickness of 0.6 mm.

[0032] Accordingly, an embodiment of the present application provides a method for fire protection of a steel column 1, comprising the following steps:

[0033] (1) First, weld the steel partition 3 horizontally to the steel column 1, with a vertical spacing of about 1200 to 1500 mm;

[0034] (2) The Z-shaped purlins 4 are then welded around the steel columns 1 and welded to the steel gratings at the same time, with a vertical spacing of about 1200 to 1500 mm.

[0035] (3) Use a 50 mm thick rock wool board to first fill the inside of the steel column 1, and then wrap the steel column 1 around it. The rock wool board is tightly pressed against the steel partition 3 above and below;

[0036] (4) Use self-tapping screws 9 to fix the fireproof board 6 (12 mm thick fiber reinforced silicate board) on the Z-shaped purlin 4;

[0037] (5) According to the requirements, a 0.6 mm thick single-layer corrugated steel plate 8 is selected as decoration and fixed to the Z-shaped purlin 4 with self-tapping screws 9.

[0038] In summary, in the technical solution of the present application, through the mutual cooperation of the partition 3, the purlin 4, the rock wool board, and the fireproof board 6, the fire protection construction of the steel structure is not affected by environmental conditions, the assembly is convenient, the fixation is reliable, the appearance is durable, and the safety hazards in the later operation are eliminated. Among them, the fireproof board 6 can solve the problem that the fireproof coating construction environment requirements are not met in the winter in the high-cold areas. Specifically, it solves the problem that the winter environment is bad in the actual project, and the construction requirements of the thick fireproof coating cannot be met, resulting in the inability to construct or inconvenience to construct, thereby affecting the construction period and quality. It also solves the problem that the fireproof coating is easy to accumulate downward, and the thick coating component particles are large, the surface is relatively rough after completion, the appearance is not good, and the problem that it may fall off in the later period is solved, so as to ensure the continuity of the construction operation and save the construction period. The fireproof board 6 is relatively thick fireproof coating, and the standardization of all components is realized, and the processing and installation quality is easier to guarantee. The installation of the fireproof board 6 is relatively thick fireproof coating construction, and the wet operation is changed to dry assembly, which is conducive to civilized construction and conforms to the development trend of construction standardization. The fireproof board 6 is relatively thick fireproof coating, has a smooth appearance, is easy to decorate, has a better visual effect, and is not easy to fall off in the later stage.

[0039] The same or similar reference numerals in the drawings of this embodiment correspond to the same or similar components. In the description of this application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A structure for fire protection of a steel column, the steel column having a web and two wing plates, the two wing plates being vertically connected to opposite sides of the web and defining two grooves; characterized in that: The structure comprises: A partition plate is connected in each of the grooves and divides each of the grooves into a plurality of chambers arranged along the length direction of the steel column; Purlins are connected around the steel columns and connected to the partitions; An inner rock wool board is filled in each of the chambers; A fireproof board wrapped around the steel column and connected to the purlin; External rock wool board, wrapped around the steel column and wrapped by the fireproof board; A corrugated steel plate wrapped around the fireproof board and connected to the purlin; Wherein, the partitions include two groups, each group includes a plurality of partitions, the two groups of partitions are respectively connected to the two grooves, in each group of partitions, each partition is perpendicular to the web and each wing, and each partition is arranged at a preset distance along the length direction of the steel column; The purlins include four groups, each group includes a plurality of purlins, the four groups of purlins are respectively connected around the steel column and connected to form a ring structure, in each group of purlins, each purlin is horizontally placed on the steel column, and each purlin is arranged at a preset distance along the length direction of the steel column.

2. A structure for fire protection of steel columns as claimed in claim 1, characterized in that: Each of the purlins has a first slat, a second slat and a third slat, the first slat and the third slat are respectively vertically connected to the opposite sides of the second slat, the first slat is connected to the steel column, the second slat is connected to the partition, and the third slat is connected to the fireproof board.

3. A structure for fire protection of steel columns as claimed in claim 1, characterized in that: The inner rock wool boards include multiple groups, each group includes multiple boards, each group of the inner rock wool boards is filled in each of the cavities respectively, in each group of the inner rock wool boards, each inner rock wool board is stacked along the depth direction of the cavity, and the edges of each inner rock wool board are tightly pressed against the surrounding wall of the cavity.

4. A structure for fire protection of steel columns as claimed in claim 1, characterized in that: The outer rock wool boards include four groups, each group includes a plurality of rock wool boards, and the four groups of outer rock wool boards are respectively covered around the steel columns and connected to form an annular structure. In each group of outer rock wool boards, the outer rock wool boards are arranged in a close fit.

5. The structure for fire protection of steel columns according to claim 1, characterized in that: The fireproof panels include four groups, each group includes a plurality of fireproof panels, and the four groups of fireproof panels are respectively covered on the four sides of the outer rock wool board and connected to form a ring structure. In each group of fireproof panels, the fireproof panels are arranged in a close fit.

6. The structure for fire protection of steel columns according to claim 1, characterized in that: The corrugated steel plates include four groups, each group includes a plurality of corrugated steel plates, the four groups of corrugated steel plates are respectively covered around the fireproof panels, and are connected to form a ring structure, and in each group of corrugated steel plates, the corrugated steel plates are arranged in a close fit.

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