Installation structure and installation method of air pipe fireproof plate

Abstract

The invention relates to an air pipe fireproof plate installation structure and method, the air pipe fireproof plate installation structure comprises an air pipe, a U-shaped light steel keel, clamping type keels, a fireproof plate, an air pipe support, a heat insulation material and angle steel fasteners, the air pipe is fixed through the air pipe support, each outer surface of the air pipe is provided with the straight-strip-shaped clamping type keels at intervals, the clamping type keels are arranged perpendicular to the length direction of the air pipe, and the angle steel fasteners are arranged on the clamping type keels. The clamping type keel is fixed to the air pipe through a self-tapping screw, and clamping openings are formed in the clamping type keel at intervals. U-shaped light steel keels are arranged on each outer surface of the air pipe at intervals, the length direction of the U-shaped light steel keels is consistent with the length direction of the air pipe, and the U-shaped light steel keels are buckled at bayonets of the clamping type keels; a fireproof plate is arranged on each outer surface of the air pipe, the fireproof plates are fixed to the U-shaped light steel keel through self-tapping screws, angle steel fasteners are arranged at the right-angle connecting positions of the fireproof plates on the adjacent faces of the air pipe, the angle steel fasteners are fixed to the edge seams of the fireproof plates through the self-tapping screws, and gaps between the air pipe and the fireproof plates are filled with heat insulation materials.

Description

Technical Field

[0001] The invention relates to the field of ventilation ducts of smoke exhaust systems, and in particular to an installation structure and an installation method of a fireproof plate of an air duct. Background Art

[0002] With the acceleration of urbanization and the increase in high-rise buildings, fire safety has become an important issue that cannot be ignored in building design. The smoke exhaust system is a key facility to ensure personnel evacuation and fire rescue in case of fire, and its fire protection performance is directly related to the safety level of the building.

[0003] As a smoke exhaust duct, the air duct is relatively thin in the prior art and is easily deformed at high temperatures, which will affect the emission of gases. Therefore, it is usually necessary to cover the outside of the air duct with a layer of fireproof board to protect the smoke exhaust duct. Fireproof board is a fireproof material specially used for ventilation or smoke exhaust ducts in construction projects. The traditional installation method is to first install a U-shaped light steel keel on the air duct to form a fixed frame, and then use self-tapping screws to fix the fireproof board to the fixed frame formed by the U-shaped light steel keel. However, due to the poor deformation resistance of the U-shaped light steel keel, it is easy to deform if the U-shaped light steel keel is used as a fixed frame, which will cause a gap between the fireproof board and the air duct, affecting the fire prevention effect. Summary of the invention

[0004] The present invention firstly discloses an installation structure of a wind duct fireproof plate, which has a simple structure, is easy to install, and can improve the stability of the structure and the fireproof effect.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A mounting structure for a duct fireproof panel, comprising an duct, a U-shaped light steel keel, a cassette keel, a fireproof panel, an duct bracket, a heat insulating material, and an angle steel fastener; the U-shaped light steel keel comprises a main connecting plate located in the middle and side plates located on both sides of the main connecting plate, the side plates are perpendicular to the main connecting plate, the free ends of the side plates are bent to form a folded edge, and the main connecting plate is provided with a hole; the cassette keel and the U-shaped light steel keel are both straight strips, the cassette keel comprises a bottom plate and side wings vertically connected to both sides of the bottom plate, bayonet holes are arranged on the side wings at intervals, and fixing holes are provided on the bottom plate; The cross-section of the air duct is a rectangular structure with open ends. The air duct is fixed by an air duct bracket, and fireproof panels are respectively arranged on the other four outer surfaces of the air duct. Cassette keels are arranged at intervals on the outer surface of each fireproof panel, and the cassette keels are fixed to the air duct by self-tapping screws, and the length direction of the cassette keels is perpendicular to the length direction of the air duct; U-shaped light steel keels are arranged at intervals on the outer surface of each fireproof panel, and the U-shaped light steel keel is perpendicular to the cassette keel, and the two side panels of the U-shaped light steel keel are respectively snapped into the adjacent snap-in openings of the cassette keel by folding edges; the fireproof panel is fixed to the U-shaped light steel keel by self-tapping screws, angle steel fasteners are arranged at the right-angle side seams of the fireproof panels on the adjacent surfaces of the air duct, and the angle steel fasteners are fixed to the side seams of the fireproof panels by self-tapping screws, fireproof sealants are arranged in the gaps between the fireproof panels, and the gaps between the air duct and the fireproof panels are filled with thermal insulation materials, and the thermal insulation materials are fixed to the air duct surface or the fireproof panels by self-adhesive rock wool nails.

[0006] Furthermore, the spacing between the card-type keels on each surface is ≤600mm.

[0007] Furthermore, the spacing between the U-shaped light steel keels on each surface is ≤600mm.

[0008] Furthermore, the number of self-adhesive rock wool nails per square meter on the thermal insulation material is not less than 7, and the center spacing between the self-adhesive rock wool nails is not less than 260 mm.

[0009] Furthermore, for the air duct in the ceiling space, angle steel fasteners are arranged at intervals at each side seam of the fireproof board, and the spacing between the angle steel fasteners is not greater than 300 mm.

[0010] Furthermore, for air ducts in non-ceiling spaces, angle steel fasteners are arranged along the entire length of each side seam of the fireproof board.

[0011] Furthermore, the opening width of the upper half of the bayonet gradually shrinks inward from the open end to the bottom, and a raised block is formed at the junction of the upper half and the lower half. The width between the raised blocks on both sides of the bayonet is the smallest, and the bottom surface and both side contours of the lower half of the bayonet are both arc-shaped; the folded edge on the side panel of the U-shaped light steel keel includes a folded edge first connecting plate and a folded edge second connecting plate, one end of the folded edge first connecting plate is vertically connected to the side panel, one end of the folded edge second connecting plate is vertically connected to the other end of the folded edge first connecting plate, and the other end of the folded edge second connecting plate faces the main connecting plate; when the U-shaped light steel keel is buckled and connected to the card-type keel, the folded edge second connecting plate is limited by the raised block.

[0012] Furthermore, the thermal insulation material is centrifugal glass wool felt.

[0013] The present invention also discloses a method for installing the above-mentioned air duct fireproof plate installation structure, comprising the following steps: Step 1: Install the air duct; Step 2: Clean the surface of the air duct; Step 3: Install the cassette keels on the outer surfaces of the air duct except the two open ends, so that the cassette keels on each surface are arranged perpendicular to the length direction of the air duct and fixed to the air duct with self-tapping screws; Step 4: After completing step 3, apply adhesive on the surface of the air duct, and then adhere the self-adhesive rock wool nails to the surface of the air duct; Step 5: After completing step 4, lay the cut insulation material on each surface of the air duct. When laying, the insulation material is staggered vertically and horizontally, and the insulation material is fixed with self-adhesive rock wool nails; Step 6: After completing step 5, install U-shaped light steel keels at intervals on each surface of the air duct, so that the U-shaped light steel keels on each surface are perpendicular to the card-type keels, and the U-shaped light steel keels are connected with the card-type keels by buckles; Step 7: After completing step 6, install fireproof panels on each surface of the air duct. The fireproof panels are fixed to the U-shaped light steel keel with self-tapping screws, and the gaps between the fireproof panels are sealed with fireproof sealant; Step 8: After completing step 7, install angle steel fasteners at the right-angle seams between the fireproof panels on adjacent surfaces, and fix the angle steel fasteners to the fireproof panels with self-tapping screws.

[0014] Furthermore, the spacing between the cassette keels and U-shaped light steel keels on each surface of the air duct is ≤600mm, the number of self-adhesive rock wool nails per square meter on the insulation material is not less than 7, the center spacing between the self-adhesive rock wool nails is not less than 260mm, and if the angle steel fasteners on the same side seam are set at intervals, the spacing between the angle steel fasteners shall not be greater than 300mm.

[0015] The installation structure of the air duct fireproof board disclosed in the present invention has a simple structure, and the installation of the fireproof board is convenient and quick. The present invention utilizes a combination of a cassette keel and a U-shaped light steel keel to form a fixed frame of the fireproof board, which is more stable as a whole and reduces the possibility of deformation of the fixed frame. Since the fixed frame has higher structural stability than that used in the prior art, it is not easy to generate a gap between the fireproof board and the air duct after installation. The present invention also fills fireproof and heat-insulating materials between the air duct and the fireproof board to further improve the fire prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation structure of the air duct fireproof plate in the embodiment; Figure 2 This is a schematic diagram of the structure of a U-shaped light steel keel; Figure 3 for Figure 2 Schematic diagram of the upward angle of view at point A in the middle; Figure 4 It is a structural schematic diagram of the card-type keel; Figure 5 It is a schematic diagram of the assembly of U-shaped light steel keel and cassette keel; Figure 6 for Figure 5 Schematic diagram of the side view at B in the middle; Figure 7 It is a structural schematic diagram of the air duct bracket.

[0017] Reference numerals: 1. Air duct; 2. U-shaped light steel keel; 21. Main connecting plate; 22. Side plate; 23. Folded first connecting plate; 24. Folded second connecting plate; 3. Fireproof board; 4. Cassette keel; 41. Bottom plate; 42. Side wing; 43. Fixing hole; 44. Bayonet; 45. Arc; 46. Raised block; 5. Insulation material; 6. Air duct bracket; 61. Base; 62. Hanger; 7. Angle steel fastener. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] This embodiment discloses a mounting structure of a duct fireproof plate, such as Figure 1 As shown, it mainly includes an air duct 1, a U-shaped light steel keel 2, a cassette keel 4, a fireproof board 3, an air duct bracket 6, a heat insulating material 5, and an angle steel fastener 7. Among them, the air duct bracket 6 is used to fix the air duct 1. The cross-section of the air duct 1 is usually rectangular. The two ends of the air duct 1 are open for air inlet and outlet. The fireproof board 3 wraps the other four sides of the air duct 1 except the open end. The fireproof board 3 covering each side of the air duct 1 is fixed on a fixed frame composed of a cassette keel 4 and a U-shaped light steel keel 2. The following first describes the structure of each of the above components one by one, and then introduces how to connect the various components.

[0020] The structure of U-shaped light steel keel 2 is as follows Figure 2 and Figure 3 As shown, the cross section of the U-shaped light steel keel 2 is a U-shaped structure, and the entire U-shaped light steel keel 2 is composed of a main connecting plate 21, side plates 22 located on both sides of the main connecting plate 21, and a folded edge formed by bending at the free end of each side plate 22. Among them, a hole is opened on the main connecting plate 21, and the folded edge is divided into a folded first connecting plate 23 and a folded second connecting plate 24. One end of the folded first connecting plate 23 is perpendicular to and connected to the side plate 22, and one end of the folded second connecting plate 24 is perpendicularly connected to the other end of the folded first connecting plate 23, and the other end of the folded second connecting plate 24 is a free end and faces the main connecting plate 21.

[0021] The structure of the card type keel 4 is as follows Figure 4As shown, the cross section of the card-type keel 4 is also a U-shaped structure, and the entire card-type keel 4 is composed of a bottom plate 41 and side wings 42 located on both sides of the bottom plate 41 and vertically connected to the bottom plate 41. Among them, a fixing hole is provided on the bottom plate 41, and a plurality of bayonet holes 44 are symmetrically and spaced on the two side wings 42, and the bayonet hole 44 is open on one side away from the bottom plate 41. In this embodiment, the overall profile of the inside of the bayonet hole 44 is in a curved shape, and the bayonet hole 44 starts from the open end to the bottom, and the opening width of the upper half of the bayonet hole 44 gradually shrinks inward from the open end, and a protruding block 43 is formed at the junction of the upper half and the lower half. In a single bayonet hole 44, the width between the protruding blocks 43 on both sides is the smallest, and the lower part of the protruding block 43 is the lower half of the bayonet hole 44. From the protruding block 43 to the bottom surface of the bayonet hole 44, the width of the bayonet hole gradually widens, and the bottom surface of the lower half is an arc 45 concave toward one side of the bottom plate 41.

[0022] The structure of the air duct support 6 is as follows Figure 7 As shown, the air duct support 6 includes a base 61 and a suspension rod 62 . The base 61 is a U-shaped groove structure. The open end of the base 61 faces downward, and the two ends of the base 61 are fixedly connected to the two suspension rods 62 .

[0023] The fireproof board 3 is installed on the air duct 1 as follows: Figure 1 As shown, the cassette keels 4 are first installed on the four sides of the air duct 1. Multiple cassette keels 4 are arranged at intervals on each side. Since the cassette keels 4 are straight strip-shaped as a whole, when installing, the length direction of the cassette keels 4 is arranged perpendicular to the length direction of the air duct 1. The self-tapping screws are inserted into the fixing holes on the bottom plate 41 of the cassette keels 4 to fix the cassette keels 4 on the air duct 1. The spacing between the cassette keels 4 on each side is ≤600mm. After the cassette keels 4 are installed, U-shaped light steel keels 2 are installed on each side of the air duct 1. The U-shaped light steel keels 2 are also straight strip-shaped, and their length direction is consistent with the length direction of the air duct 1. The U-shaped light steel keels 2 are across the adjacent cassette keels 4 and are fixed on the cassette keels 4 in a buckle manner. At least two U-shaped light steel keels 2 are also arranged at intervals on each side, so that the spacing between the U-shaped light steel keels 2 on the same side is ≤600mm. When the U-shaped light steel keel 2 is buckled with the card-type keel 4, Figure 5 and Figure 6 As shown, the length of the U-shaped light steel keel 2 is greater than the spacing of the card-type keel 4, so that the two side panels 22 of the U-shaped light steel keel 2 are respectively embedded in the two adjacent card slots 44 of the card-type keel 4. At this time, the folded second connecting plate 24 is limited by the raised card block 43 to prevent the U-shaped light steel keel 2 from escaping from the card slot 44.

[0024] In continuation of the above, a fireproof board 3 is set on the outside of each side of the U-shaped light steel keel 2, and the fireproof board 3 is fixed to the U-shaped light steel keel 2 with self-tapping screws. Angle steel fasteners 7 are set at the right-angle connecting edge seams of the fireproof boards 3 on the adjacent surfaces of the air duct 1, and the angle steel fasteners 7 are fixed to the fireproof boards 3 with self-tapping screws, and fireproof sealant is set in the gaps between the fireproof boards 3. When the angle steel fasteners 7 are installed, for the air duct 1 in the ceiling space, the ceiling can hide the air duct 1. In order to save costs, angle steel fasteners 7 can be set at intervals at each edge seam of the fireproof board 3, and the spacing between the angle steel fasteners 7 is not more than 300mm; for the air duct 1 in the non-ceiling space, considering the aesthetics, angle steel fasteners 7 can be arranged throughout each edge seam of the fireproof board 3, so as to hem the edge seam.

[0025] In order to improve the fire prevention effect, the gap between the air duct 1 and the fireproof board 3 is filled with a heat insulation material 5. The heat insulation material 5 is made of centrifugal glass wool felt, which has fireproof and heat insulation effects. The heat insulation material 5 can be first pasted on the air duct 1 after the cassette keel 4 is installed, and then the U-shaped light steel keel 2 is installed. The heat insulation material 7 can be fixed on the surface of the air duct 1 or the inner surface of the fireproof board 3 by self-adhesive rock wool nails. When the self-adhesive rock wool nails are bonded, the number of self-adhesive rock wool nails per square meter on the heat insulation material 7 is not less than 7, and the center spacing between the self-adhesive rock wool nails is not less than 260mm.

[0026] The installation method of the above-mentioned air duct fireproof board installation structure is as follows: Step 1: First, the air duct 1 is fixed by using the air duct bracket 6. The air duct 1 is fixed on the base 61 of the air duct bracket 6. After installation, inspection and acceptance are performed; Check whether the material of the air duct 1 meets the design requirements, whether the connection of the air duct 1 is firm, and confirm whether the sealing performance of the connection part is good; check whether the material, specification and installation position of the air duct bracket 6 meet the design requirements; verify whether the spacing of the air duct bracket 6 is reasonable and can withstand the weight of the air duct 1 and the vibration during operation; check whether the fire blocking of the air duct 1 passing through the fire partition, floor, wall and other parts is tight, etc.

[0027] Step 2: Clean the surface of the air duct 1 to ensure that there is no debris, dust, oil, etc.; Step 3: Install the cassette keels 4 on the remaining outer surfaces of the air duct 1 except the two open ends, so that the cassette keels 4 on each surface are arranged perpendicular to the length direction of the air duct 1, and the spacing between the cassette keels 4 on each surface is ≤600mm. The cassette keels 4 are fixed to the air duct 1 with self-tapping screws, and the flatness of the cassette keels 4 meets the requirements by adjusting the self-tapping screws; Step 4: After completing step 3, apply adhesive on the surface of the air duct 1, and then adhere the self-adhesive rock wool nails to the surface of the air duct 1; the number of self-adhesive rock wool nails per square meter is not less than 7, and the center distance between the self-adhesive rock wool nails is not less than 260mm; Step 5: After completing step 4, lay the cut insulation material 5 on each surface of the air duct 1. The size of the insulation material 5 should be accurate when cutting and the cutting surface should be flat; the vertical and horizontal seams should be staggered when laying the insulation material 5, and the small-sized insulation material 5 should be laid on the horizontal surface of the air duct 1 as much as possible. First, stick the insulation material on the air duct 1, and use a little force to make the self-adhesive rock wool nails pass through the insulation material 5. After checking that the position is accurate, use the rock wool nails to cover and fix the insulation material 5; Step 6: After completing step 5, U-shaped light steel keels 2 are installed at intervals on each surface of the air duct 1. The spacing between the U-shaped light steel keels 2 is ≤ 600 mm. The U-shaped light steel keels 2 on each surface are perpendicular to the card-type keels 4. The U-shaped light steel keels 2 are snap-connected with the card-type keels 4. Step 7: After completing step 6, install the fireproof board 3 on each surface of the air duct 1, fix the fireproof board 3 on the U-shaped light steel keel 2 with self-tapping screws, and seal the gaps between the fireproof boards 3 with fireproof sealant; Step 8: After completing step 7, install angle steel fasteners 7 at the right-angled seams between the fireproof panels 3 on adjacent surfaces. The angle steel fasteners 7 are fixed to the fireproof panels 3 with self-tapping screws. The spacing between the angle steel fasteners 7 should not be greater than 300 mm. If the air duct 1 is in a non-ceiling space, in order to increase the aesthetics of the indoor space, the angle steel fasteners 7 can be arranged throughout the length for edging.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An installation structure for a duct fireproof plate, characterized in that: It includes air duct, U-shaped light steel keel, cassette keel, fireproof board, air duct bracket, heat insulation material, angle steel fastener; the U-shaped light steel keel includes a main connecting plate located in the middle and side plates located on both sides of the main connecting plate, the side plates are perpendicular to the main connecting plate, the free ends of the side plates are bent to form folded edges, and the main connecting plate is provided with holes; the cassette keel and the U-shaped light steel keel are both straight strips, the cassette keel includes a bottom plate and side wings vertically connected to both sides of the bottom plate, bayonet holes are arranged on the side wings at intervals, and fixing holes are opened on the bottom plate; The cross-section of the air duct is a rectangular structure with open ends. The air duct is fixed by an air duct bracket, and fireproof panels are respectively arranged on the other four outer surfaces of the air duct. Cassette keels are arranged at intervals on the outer surface of each fireproof panel, and the cassette keels are fixed to the air duct by self-tapping screws, and the length direction of the cassette keels is perpendicular to the length direction of the air duct; U-shaped light steel keels are arranged at intervals on the outer surface of each fireproof panel, and the U-shaped light steel keel is perpendicular to the cassette keel, and the two side panels of the U-shaped light steel keel are respectively snapped into the adjacent snap-in openings of the cassette keel by folding edges; the fireproof panel is fixed to the U-shaped light steel keel by self-tapping screws, angle steel fasteners are arranged at the right-angle side seams of the fireproof panels on the adjacent surfaces of the air duct, and the angle steel fasteners are fixed to the side seams of the fireproof panels by self-tapping screws, fireproof sealants are arranged in the gaps between the fireproof panels, and the gaps between the air duct and the fireproof panels are filled with thermal insulation materials, and the thermal insulation materials are fixed to the air duct surface or the fireproof panels by self-adhesive rock wool nails.

2. The installation structure of the air duct fireproof plate according to claim 1 is characterized in that: The spacing between the card-type keels on each surface is ≤600mm.

3. The installation structure of the air duct fireproof plate according to claim 1 is characterized in that: The spacing between U-shaped light steel keels on each surface is ≤600mm.

4. The installation structure of the air duct fireproof plate according to claim 1 is characterized in that: The number of self-adhesive rock wool nails per square meter on the thermal insulation material is not less than 7, and the center spacing between the self-adhesive rock wool nails is not less than 260 mm.

5. The installation structure of the air duct fireproof plate according to claim 1 is characterized in that: For the air ducts in the ceiling space, angle steel fasteners are installed at intervals at each side seam of the fireproof board, and the spacing between the angle steel fasteners shall not exceed 300mm.

6. The installation structure of the air duct fireproof plate according to claim 1, characterized in that: For air ducts in non-ceiling spaces, angle steel fasteners are installed along the entire length of each side seam of the fireproof panel.

7. The installation structure of the air duct fireproof plate according to claim 1, characterized in that: The bayonet starts from the open end to the bottom, and the opening width of the upper half gradually shrinks inward and narrows. A raised block is formed at the junction of the upper half and the lower half. The width between the raised blocks on both sides of the bayonet is the smallest, and the bottom surface and both side contours of the lower half of the bayonet are both arc-shaped; the folded edge on the side panel of the U-shaped light steel keel includes a folded edge first connecting plate and a folded edge second connecting plate, one end of the folded edge first connecting plate is vertically connected to the side panel, one end of the folded edge second connecting plate is vertically connected to the other end of the folded edge first connecting plate, and the other end of the folded edge second connecting plate faces the main connecting plate; when the U-shaped light steel keel is buckled and connected to the card-type keel, the folded edge second connecting plate is limited by the raised block.

8. The installation structure of the air duct fireproof plate according to claim 1, characterized in that: The heat insulating material is centrifugal glass wool felt.

9. The method for installing the installation structure of the air duct fireproof plate according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Install the air duct; Step 2: Clean the surface of the air duct; Step 3: Install the cassette keels on the outer surfaces of the air duct except the two open ends, so that the cassette keels on each surface are arranged perpendicular to the length direction of the air duct and fixed to the air duct with self-tapping screws; Step 4: After completing step 3, apply adhesive on the surface of the air duct, and then adhere the self-adhesive rock wool nails to the surface of the air duct; Step 5: After completing step 4, lay the cut insulation material on each surface of the air duct. When laying, the insulation material is staggered vertically and horizontally, and the insulation material is fixed with self-adhesive rock wool nails; Step 6: After completing step 5, install U-shaped light steel keels at intervals on each surface of the air duct, so that the U-shaped light steel keels on each surface are perpendicular to the card-type keels, and the U-shaped light steel keels are connected with the card-type keels by buckles; Step 7: After completing step 6, install fireproof panels on each surface of the air duct. The fireproof panels are fixed to the U-shaped light steel keel with self-tapping screws, and the gaps between the fireproof panels are sealed with fireproof sealant; Step 8: After completing step 7, install angle steel fasteners at the right-angle seams between the fireproof panels on adjacent surfaces, and fix the angle steel fasteners to the fireproof panels with self-tapping screws.

10. The method for installing the installation structure of the air duct fireproof plate according to claim 9, characterized in that: The spacing between the cassette keels and U-shaped light steel keels on each surface of the air duct is ≤600mm, the number of self-adhesive rock wool nails per square meter on the insulation material is not less than 7, the center spacing between the self-adhesive rock wool nails is not less than 260mm, and if the angle steel fasteners on the same side seam are set at intervals, the spacing between the angle steel fasteners shall not exceed 300mm.

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