CN217150743U - Lightweight concrete fireproof layer for building steel structure - Google Patents

Abstract

The utility model belongs to the technical field of the building steel construction fire prevention, specifically be a lightweight concrete flame retardant coating for building steel construction. The lightweight concrete fireproof layer comprises a steel member, wherein the outer surface of the steel member is coated with a glue layer, the outer surface of the glue layer is coated with a lightweight concrete layer, and the outer surface of the lightweight concrete layer is coated with a paint film; also comprises a hanging net and a connecting piece; the net is arranged in the lightweight concrete layer, one end of the connecting piece is fixedly connected with the net, and the other end of the connecting piece is fixedly connected with the steel member. A layer of lightweight concrete is coated outside the steel member, the lightweight concrete fireproof layer is not easily influenced by wind sand and high-temperature environment, and the fireproof construction cost of the lightweight concrete is much lower than that of the fireproof coating; the lightweight concrete cementing agent can increase the adhesiveness of the lightweight concrete and a steel structure and prevent the lightweight concrete from falling off from the smooth steel structure surface due to external forces such as wind load and the like; the light concrete is internally provided with the hanging net, so that the firmness of the concrete is improved.

Description

Lightweight concrete fireproof layer for building steel structure

Technical Field

The utility model belongs to the technical field of the building steel construction fire prevention, specifically be a lightweight concrete flame retardant coating for building steel construction.

Background

At present, steel structure fire prevention is generally applicable to chemical industry and oil gas project, the steel structure is under the conflagration high temperature effect, its mechanical properties such as yield strength, elastic modulus can reduce along with the temperature rise, will lose bearing capacity usually in 450 ℃ -650 ℃, take place very big deformation, lead to the steel column, the girder steel is crooked, steel structure that generally does not protect will lose bearing capacity and collapse about 15min, consequently in chemical industry and oil gas project construction, take fire prevention measure to the steel structure, improve the limit range of the fire endurance of steel structure to the design specification regulation, prevent that the steel component from rising the temperature rapidly and taking place deformation and collapsing in the conflagration.

The steel structure fire prevention type is selected for use and is vital to different environments, and to the gas booster station project among the desert, the conventional spraying fire-retardant coating is volatile effect under this kind of windy sand, high temperature environment, and the steel component is after meetting the fire disaster, and easy rapid heating up takes place the shape, leads to whole steel construction to take place to collapse, causes major accident.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the volatile effect of conventional spraying fire protection coating under sand blown by the wind, high temperature environment, the steel component is meetting the fire disaster after, heaies up rapidly easily and takes place to appear, leads to whole steel construction to take place to collapse, causes the technical problem of major accident, provides a lightweight concrete flame retardant coating for building steel construction.

In order to achieve the above object, the utility model discloses a technical scheme be: the utility model provides a lightweight concrete flame retardant coating for building steel structure, includes the steel member, its characterized in that, steel member surface coating one deck glue film, glue film surface coating one deck light concrete layer, light concrete layer surface coating one deck paint film.

Preferably, the device also comprises a hanging net and a connecting piece; the net is arranged in the lightweight concrete layer, one end of the connecting piece is fixedly connected with the net, and the other end of the connecting piece is fixedly connected with the steel member.

Preferably, the thickness of the lightweight concrete layer is 40-60 mm.

Preferably, the thickness of the paint film is 0.1-0.3 mm.

Preferably, the steel member is one of i-steel, channel steel, square tube steel and round tube steel.

Preferably, the glue layer is one of a lightweight concrete cementing agent and a fireproof glue.

Preferably, the connecting piece is one of a net hanging nail and a steel bar.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect: (1) the steel member is coated with a layer of light concrete (foam concrete), the light concrete fireproof layer is not easily influenced by wind, sand and high-temperature environment, and has unique superiority, and the fireproof construction cost (material cost and labor cost) of the light concrete is much lower than the fireproof coating construction cost (material cost and labor cost); (2) the glue layer (lightweight concrete cementing agent or fireproof glue) can increase the adhesiveness of the lightweight concrete and the steel structure and prevent the lightweight concrete from falling off from the smooth steel structure surface due to external force such as wind load and the like; (3) the light concrete is internally provided with the hanging net, so that the firmness of the concrete is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

FIG. 1 is a cross-sectional view of a fire barrier having a steel structure of an I-beam according to example 1;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic view of a structure of a screen in embodiment 1;

FIG. 4 is a cross-sectional view of a fire barrier in which the steel structure is a channel steel in example 2;

FIG. 5 is a sectional view of a fire-retardant layer in which a steel structure is a square-tube steel material in example 3;

FIG. 6 is a cross-sectional view of a fire retardant layer in which the steel structure is round-tube steel in example 4;

fig. 7 is a schematic view of a structure of the suspended net in embodiment 4.

1-a steel member;

2-glue layer;

3-a lightweight concrete layer;

4-paint film;

5, hanging a net;

6-connecting piece.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Example 1

A lightweight concrete fire barrier for a construction steel structure according to embodiment 1 will be described with reference to fig. 1 to 3, and as shown in fig. 1 and 2, includes a steel member 1, wherein the steel member 1 is an i-beam; the outer surface of the steel member 1 is coated with a glue layer 2, and the glue layer 2 is a lightweight concrete cementing agent; the outer surface of the glue layer 2 is coated with a light concrete layer 3, and the thickness of the light concrete layer 3 is 50 mm; the outer surface of the light concrete layer 3 is coated with a paint film 4; the thickness of the paint film 4 is 0.2 mm.

As shown in fig. 1, 2 and 3, the utility model further comprises a net 5 and a connecting piece 6, wherein the connecting piece 6 is a net nail; the net 5 sets up in lightweight concrete layer 3, net nail one end and net 5 fixed connection hang, the other end and steel member 1 fixed connection.

The surface of the steel member 1 is provided with a light concrete layer 3 as a protective material, the light concrete is foam concrete, the light concrete layer 3 has strong fire resistance and heat insulation, is not easily influenced by wind, sand and high-temperature environment, has low heat conductivity coefficient and large heat capacity, can prevent flame from directly firing the steel member 1, reduces the heat transfer speed, and ensures that the temperature of the steel member 1 does not exceed the critical temperature within the specified time, thereby playing a role of protection; and the construction cost (material cost and labor cost) of the light concrete layer 3 for fire prevention is much lower than that of the common fire-retardant coating.

Set up one deck glue film 2 between steel member 1 and light concrete layer 3, glue film 2 adopts the cement of light concrete, and the cement of light concrete uses the adhesivity of multiplicable light concrete layer 3 on steel member 1, prevents that light concrete layer 3 from droing from smooth steel member 1 surface because of exogenic action such as wind load.

A hanging net 5 is arranged in the lightweight concrete layer 3, the hanging net 5 is fixed at a position which is a certain distance away from the steel member 1 through a connecting piece 6 and is positioned in the lightweight concrete layer 3, and the connecting piece 6 adopts hanging net nails; one end of the net hanging nail is fixedly connected with the net hanging 5, and the other end of the net hanging nail is fixedly connected with the steel member 1; the arrangement of the hanging net 5 can increase the firmness of the lightweight concrete layer 3.

Example 2

The difference between the present embodiment and embodiment 1 is that, as shown in fig. 4, the steel member 1 is a channel steel, the glue layer 2 is a fire-proof glue, and the thickness of the lightweight concrete layer 3 is 40 mm; the thickness of the paint film 4 is 0.1 mm.

Example 3

The present embodiment is different from embodiment 1 in that, as shown in fig. 5, the steel member 1 is a square tube steel material; the glue layer 2 is a lightweight concrete cementing agent; the thickness of 3 layers of the light concrete layer is 60 mm; the thickness of the paint film 4 is 0.3 mm; the connecting piece 6 is a steel bar.

Example 4

The present embodiment is different from embodiment 3 in that, as shown in fig. 6 and 7, the steel member 1 is a round pipe steel; the adhesive layer 2 is fireproof adhesive; the thickness of 3 layers of the light concrete layer is 50 mm; the thickness of the paint film 4 is 0.2 mm.

One end of the steel pipe is welded on the steel pipe, and the other end of the steel pipe is welded and fixed with the hanging net 5; is convenient to use and is suitable for thin-wall pipes.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes to be applied in other fields, but all the technical matters of the present invention are not departed from the technical contents of the present invention, and any simple modification and equivalent changes made to the above embodiments according to the technical matters of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (7)

1. The utility model provides a lightweight concrete flame retardant coating for building steel structure, includes steel member (1), its characterized in that, steel member (1) surface coating one deck glue film (2), glue film (2) surface coating one deck lightweight concrete layer (3), lightweight concrete layer (3) surface coating one deck paint film (4).

2. A lightweight concrete fire barrier for construction steel structures according to claim 1, further comprising a hanging net (5) and a connecting member (6); hang net (5) and set up in lightweight concrete layer (3), connecting piece (6) one end and string net (5) fixed connection, the other end and steel member (1) fixed connection.

3. A lightweight concrete fire barrier for construction steel structures according to claim 2, characterized in that the thickness of the lightweight concrete layer (3) is 40-60 mm.

4. A lightweight concrete fire barrier for construction steel structures according to claim 2, characterized in that the thickness of said paint film (4) is 0.1-0.3 mm.

5. A lightweight concrete fire barrier for construction steel structure according to claim 1, wherein said steel member (1) is one of i-steel, channel steel, square tube steel and round tube steel.

6. The lightweight concrete fire barrier for construction steel structures according to claim 1, wherein the glue layer (2) is one of lightweight concrete cement and fire-proof glue.

7. A lightweight concrete fire barrier for construction steel structures according to claim 2, wherein said connector (6) is one of a mesh nail and a steel bar.

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