Fabricated fireproof air duct

Abstract

The invention discloses an assembly type fireproof air pipe which comprises an air pipe body, rock wool, a fireproof plate and a fireproof plate fixing piece. Wherein the air pipe is wrapped with rock wool; a fireproof plate is installed on the part, starting from the wall to the outside, of the air pipe and wraps rock wool. The fireproof plate is fixed on the outer side of the rock wool through a plurality of fireproof plate fixing pieces; the fireproof plate fixing pieces comprise pipe body fireproof plate fixing pieces and end fireproof plate fixing pieces, the end fireproof plate fixing pieces are arranged on the outermost sides, away from the wall, of the fireproof plates, and the other fireproof plate fixing pieces are the pipe body fireproof plate fixing pieces.

Description

Technical Field

[0001] The invention relates to the field of building equipment installation, and in particular to an assembled fireproof air duct. Background Art

[0002] According to the requirements of the Code for Fire Protection Design of Buildings GB50016-2014, "When air ducts pass through fireproof partitions, floor slabs and fire walls, the fire dampers and smoke exhaust fire dampers on the air ducts at the crossing point and the air ducts within 2.0m on both sides should use fire-resistant air ducts or fire protection measures should be taken on the outer walls of the air ducts, and the fire resistance limit should not be lower than the fire resistance limit of the fire partition."

[0003] The existing metal duct system cannot meet the fire resistance requirements of the above specifications. At the same time, the existing metal duct system also requires the processing, manufacturing and assembly of various components on site, which is time-consuming and difficult to ensure quality. Summary of the invention

[0004] To this end, the present invention proposes an assembled fireproof air duct. While meeting the fire protection requirements of the specifications, various components can be processed and manufactured in advance in the factory, and only plugging and assembling are required at the construction site, which improves work efficiency and ensures product quality.

[0005] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0006] An assembled fireproof air duct comprises an air duct, rock wool, a fireproof board, and fireproof board fixings; wherein: the air duct is wrapped with rock wool; a part of the air duct extending outward from the wall is installed with a fireproof board, and the fireproof board is wrapped with rock wool; the fireproof board is fixed to the outside of the rock wool by a plurality of fireproof board fixings; the fireproof board fixings comprise a tube body fireproof board fixing and an end fireproof board fixing, wherein the end fireproof board fixings are arranged at the outermost side of the fireproof board away from the wall, or the end fireproof board fixings are respectively arranged on one side of the fireproof board adjacent to the wall and on the outermost side away from the wall; the remaining fireproof board fixings are tube body fireproof board fixings.

[0007] The assembled fireproof air duct, wherein: the number of the fireproof plate fixing parts of the tube body is multiple, and the length of the air duct is arranged in sequence at a predetermined distance.

[0008] The described assembled fireproof air duct, wherein: the outer wall of the air duct is welded with welding nails, the top ends of the welding nails pass through the rock wool and then bend to fix the rock wool on the air duct.

[0009] The described assembled fireproof air duct, wherein: the fireproof plate fixing part of the tube body is a rectangular plate after being unfolded, and funnel-shaped grooves are symmetrically arranged at a certain interval on the upper and lower long sides of the rectangular plate, and the shapes and sizes of the grooves on the upper and lower sides are the same, and 4 grooves are arranged on the upper and lower sides of the rectangular plate.

[0010] The described assembled fireproof air duct comprises: three connecting pieces extending outward from the end of one side of the short side of the rectangular plate; two longitudinal slits are cut on the transverse extension lines of the three connecting pieces on the other side of the short side of the rectangular plate, the two longitudinal slits are arranged at a predetermined distance in the transverse direction, and the portion between the two longitudinal slits is extruded outward to form a connecting belt.

[0011] The described assembled fireproof air duct, wherein: the fireproof plate fixing part of the tube body is a frame structure, the frame structure is a rectangular frame, and three connecting pieces are respectively inserted into three connecting belts at the top of the upper frame and the two side walls of the upper frame of the rectangular frame, and are inserted from one end of the connecting belt and extended from the other end and folded.

[0012] The described assembled fireproof air duct, wherein: the single-sided cross-section of the frame structure has three grooves, namely the lower groove and the left groove and the right groove arranged on the top of the lower groove, the left and right grooves are symmetrical and arranged back to back, the grooves are in opposite directions and are both arranged outward, and the two bottom edges of the lower groove are each provided with an inverted folded edge; the grooves of the left and right grooves are respectively used to accommodate the fireproof panels, and the lower groove is used to fill rock wool.

[0013] The described assembled fireproof air duct, wherein: the end fireproof board fixing piece is a frame structure, and the single-sided cross-section of the frame structure has three grooves, namely a lower groove and a left groove and a right groove arranged on the top of the lower groove, the left and right grooves are symmetrical and arranged back to back, the grooves are in opposite directions and are both arranged outward, and the two bottom edges of the lower groove are each provided with an inverted folded edge; the groove of the right groove is used to accommodate the fireproof board; the upper side plate of the left groove extends out of the outer end of the lower groove and is folded downward to form a folded edge.

[0014] The assembled fireproof air duct, wherein: the folded edge is spaced a certain distance from the side wall of the lower groove, which is used to insert and fix the strip fireproof board.

[0015] The described assembled fireproof air duct, wherein: the air duct is supported by a steel cross arm, and a strip fireproof plate is provided between the steel cross arm and the air duct.

[0016] The assembled fireproof air duct, wherein: also includes an assembled fireproof damper.

[0017] An assembled fire damper comprises a fire damper, rock wool and a fireproof board, wherein: both ends of the fire damper are respectively connected to an air duct and an air duct component, the outer side of the fire damper is wrapped with rock wool, and the outer side of the rock wool is wrapped with a fireproof board; the fireproof board on the side of the fire damper actuator can be opened and closed and connected to the fireproof board on the top of the fire damper.

[0018] The assembled fire damper, wherein: flanges are provided at both ends of the fire damper.

[0019] The assembled fire damper, wherein: flame retardant sealing strips are installed at the connection between the two ends of the fire damper and the air duct and the air duct components.

[0020] The assembled fire damper, wherein: a plurality of hinges are provided at the intersection of the fireproof plate at the top of the fire damper and the fireproof plate on the side of the fire damper actuator, and the two sides of the hinges are respectively connected to the fireproof plate at the top of the fire damper and the fireproof plate on the side of the fire damper actuator.

[0021] The assembled fire damper, wherein: a protrusion is provided on the fire damper actuator side fire plate.

[0022] The assembled fire damper, wherein: a square hole is opened on the fire plate on the fire damper actuator side, and the four sides of the square hole are fixedly connected to the four sides of the square protrusion formed by the fire plate.

[0023] The assembled fire damper, wherein: the size of the opening is slightly larger than the outer dimensions of the fire damper actuator.

[0024] The assembled fire damper further comprises a trapezoidal connecting piece, wherein the trapezoidal connecting piece is fixed on the top of the fire damper.

[0025] The assembled fire damper, wherein: the trapezoidal connecting piece is suspended on the top of the building through a suspension rod.

[0026] The assembled fire damper, wherein: the air duct component includes a prefabricated fireproof ventilation sleeve, an air duct regulating valve, and an air duct check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the assembled fireproof air duct structure;

[0028] Figure 2 It is a schematic diagram of the left-side cross-sectional structure of the assembled fireproof air duct;

[0029] Figure 3 This is a schematic diagram of the fireproof board fixings for the pipe body;

[0030] Figure 4 It is a schematic diagram of the structure of the fireproof board fixing parts of the pipe body;

[0031] Figure 5 It is a schematic diagram of a single side section of the fireproof board fixing of the pipe body;

[0032] Figure 6 This is a schematic diagram of the pipe body fireproof board fixing node 2;

[0033] Figure 7 This is a schematic diagram of the end fireproof board fixings;

[0034] Figure 8 It is a schematic diagram of the structure of the end fireproof board fixing parts;

[0035] Fig. 9It is a schematic diagram of a single side section of the end fireproof board fixing;

[0036] Fig.10 It is a schematic diagram of the end fireproof board fixing node 1;

[0037] Fig.11 It is a schematic diagram of the expansion node 3 of the end fireproof board fixing part;

[0038] Fig.12 It is a schematic diagram for filling the strip fireproof board;

[0039] Fig.13 This is a schematic diagram of the structure of an assembled fire damper;

[0040] Fig.14 It is a schematic diagram of the left side section of the assembled fire damper;

[0041] Fig.15 This is a schematic diagram of the structure when the assembled fire damper is opened;

[0042] Fig.16 This is a structural diagram of the assembled fire damper when it is opened after being wrapped with rock wool and hidden. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-16 , the specific implementation modes of the present invention are described in detail. The implementation modes are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0044] "One embodiment" or "some embodiments" described in this specification means that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0045] like Figure 1 , 2 As shown, the assembled fireproof air duct of the present invention comprises an air duct 19, rock wool 12, a fireproof board 5, a pipe body fireproof board fixing member 1, and an end fireproof board fixing member 2; Figure 1As shown, a through-wall hole (not shown in the figure) is opened on the left side of the wall 9, and the air duct 19 passes through the through-wall hole and then passes out. A fire damper 28 is arranged outside the through-wall hole, and one end of the fire damper is connected to the air duct in the through-wall hole, and the other end is connected to the air duct 19 outside the through-wall hole. The air duct in the through-wall hole is wrapped with rock wool, and the rock wool is wrapped with a fireproof board; the part of the air duct 19 located in the through-wall hole is arranged in a preset fireproof ventilation sleeve 20, and a fire damper 23 is arranged outside the through-wall hole, and one end of the fire damper is connected to the fireproof board. The ventilation sleeve 20 is connected, and the other end is connected to the air duct 19. A portion of the air duct 19 located outside the wall hole is wrapped with rock wool 12, and the wrapped length is at least 2 meters extending outward from the fire damper 28; the fireproof board 5 is fixed to the outside of the rock wool by a plurality of fireproof board fixings, and the fireproof board fixings include a tube body fireproof board fixing 1 and an end fireproof board fixing 2, wherein one end fireproof board fixing 2 is arranged on the outermost side of the fireproof board 5 away from the wall, and the remaining fireproof board fixings are the tube body fireproof board fixings 1.

[0046] In another embodiment, a preset fireproof ventilation sleeve 20 is installed in the wall hole, a portion of the air duct 19 located in the wall hole is arranged in the preset fireproof ventilation sleeve 20, a fire damper 28 is provided outside the wall hole, one end of the fire damper is connected to the fireproof ventilation sleeve 20, and the other end is connected to the air duct 19, a portion of the air duct 19 located outside the wall hole is wrapped with rock wool 12, and the wrapping length is at least 2 meters extending outward from the fire damper 28; the fireproof board 5 is fixed to the outside of the rock wool by a plurality of fireproof board fixings, the fireproof board fixings include a tube body fireproof board fixing 1 and an end fireproof board fixing 2, wherein the two end fireproof board fixings 2 are respectively arranged at one end of the fireproof board 5 close to the wall and the outermost side away from the wall, and the remaining fireproof board fixings are the tube body fireproof board fixings 1.

[0047] There are multiple fireproof plate fixings 1 for the pipe body, which are arranged in sequence at predetermined intervals along the length direction of the air duct 19 .

[0048] like Figure 2 As shown, welding nails 10 are welded to the outer wall of the air duct 19 , and the top ends of the welding nails 10 pass through the rock wool 12 and then bend to fix the rock wool 12 on the air duct 19 .

[0049] like Figure 3As shown, the fireproof board fixing member 1 of the pipe body is a rectangular plate after being unfolded. A funnel-shaped groove is symmetrically arranged at a certain distance on the upper and lower long sides of the rectangular plate. The grooves on the upper and lower sides are of the same shape and size, and are arranged symmetrically with the center line of the short side of the rectangle as the axis. There are 4 grooves on the upper and lower sides of the rectangular plate. Four rectangles are cut off from one side of the short side of the rectangular plate, and finally three strips are formed. The lengths of the parts of the three strips extending from the ends of the rectangular plate are equal, the middle strip is slightly wider, the upper and lower strips are the same size, and the width is slightly narrower than the middle strip. The three strips serve as connecting pieces 16; on the other side of the short side of the rectangular plate, two longitudinal slits are cut on the horizontal extension lines of the three strips, and the two longitudinal slits are arranged at a predetermined distance in the horizontal direction. The part between the two longitudinal slits is extruded outward to form a connecting strip 17. The connecting strip 17 is the same in number as the opposite side strips, and the width is slightly wider than the corresponding opposite side strips. The rectangular plate is provided with a plurality of folding lines along the long side direction, and can be folded along the folding lines to form Figure 4 The frame structure of the shape shown, the schematic diagram of the single-side section of the frame structure is shown in Figure 5 .like Figure 4 , 6 As shown, the frame structure is a rectangular frame, and three connecting pieces 16 are respectively inserted into three connecting belts 17 at the top of the upper frame and the two side walls of the upper frame. After being inserted from one end of the connecting belt 17, it extends out from the other end and folds over, pressing the connecting belt 17 into the connecting piece 16, thereby locking the frame on the air duct 19.

[0050] like Figure 5 As shown, there are three grooves in the single-sided cross-section of the frame structure, namely the lower groove and the left groove and the right groove arranged on the top of the lower groove. The left and right grooves are symmetrical and arranged back to back, both are rectangular, the notches are in opposite directions and are both arranged outward, and the notch heights of the left and right grooves are the same as the thickness of the fireproof board 5. The two bottom edges of the lower groove are each provided with an inward folded edge, and the folded edge is supported on the surface of the air duct 19; the notches of the left and right grooves are respectively used to accommodate the fireproof board 5, that is, the fireproof boards on both sides of the fireproof board fixing part 1 of the tube body are respectively inserted into the left and right grooves, and inserted into the bottom of the groove, and the lower groove is used to fill rock wool 12.

[0051] like Figure 7 As shown, the end fireproof panel fixing member 2 is similar to the tube body fireproof panel fixing member 1, and is also formed by cutting and folding a rectangular plate. The difference is that one side of the long side of the rectangular plate has three more folding lines than the other side, and the three folding lines are arranged in the middle of the upper connecting plate 16 and the middle connecting plate 16.

[0052] A small square 31 is cut out at the position where the three fold lines intersect vertically with the longitudinal extension line of the bottom of the funnel-shaped groove, such as Fig.11As shown, the center of the small square coincides with the vertical intersection of the middle folding line of the three folding lines and the longitudinal extension line of the bottom of the funnel-shaped groove, and the two corner points of the small square coincide with the intersections of the other two folding lines and the longitudinal extension line of the bottom of the funnel-shaped groove, so that after folding, a folded edge 18 can be folded out, as shown in FIG. Fig. 9 , Fig.10 As shown, it is used to fix the strip fireproof board 6.

[0053] like Figure 8 As shown, the end fireproof board fixing part 2 is also a frame structure, which is also a rectangular frame. Three connecting pieces 16 are respectively inserted into three connecting belts 17 at the top of the upper frame and the two side walls of the upper frame. After being inserted from one end of the connecting belt 17, it extends out from the other end and folds over, pressing the connecting belt 17 into the connecting piece 16, thereby locking the frame on the air duct 19.

[0054] like Fig. 9 As shown, the single-sided cross-section of the frame structure of the end fireproof board fixing part 2 has three grooves, namely the lower groove and the left groove and the right groove arranged on the top of the lower groove. The left and right grooves are symmetrical and arranged back to back, both are rectangular, the notches are in opposite directions and are both arranged outward, the notch height of the right groove is the same as the thickness of the fixed fireproof board 5, and the two bottom edges of the lower groove are each provided with an inverted folded edge, and the folded edge is supported on the surface of the air duct 19; the notch of the right groove is used to accommodate the fireproof board 5, that is, the fireproof board is inserted into the right groove and inserted into the bottom of the groove; the upper side plate of the left groove extends out of the outer end of the lower groove and is folded downward to form a folded edge 18, and the folded edge 18 is spaced a certain distance from the side wall of the lower groove for inserting and fixing the strip fireproof board 6, as shown Fig.10 As shown. Fig.12 As shown, a strip fireproof board 6 is inserted into the bottom of the left groove in the horizontal direction, and another strip fireproof board 6 is inserted into the folded edge 18 from bottom to top and covers the side wall of the lower groove; the lower groove is used to fill the rock wool 12. Thus, the strip fireproof board 6 is also blocked at the outer end of the fireproof board, thereby improving the fireproof performance.

[0055] like Figure 1 As shown, the air duct 19 is supported by multiple suspension devices, which include a steel crossarm 7 and a hanger 8. The steel crossarm 7 is an angle steel. Round holes are provided at both ends of the steel crossarm 7. The diameter of the round holes is slightly larger than the diameter of the hanger 8. The lower end of the hanger 8 passes through the round hole and is locked by a nut, and the upper end is fixed to the top of the building. The fixing method may be, for example, threaded connection, welding fixation, etc. The steel crossarm 7 is used to support the air duct 19, so that the air duct 19 can be hung on the building.

[0056] like Figure 2As shown, a strip fireproof board 6 of the same size as the bearing surface of the steel crossarm 7 is also provided on the steel crossarm 7. Circular holes of the same size are provided at both ends of the strip fireproof board 6 at this position and at the corresponding positions of the steel crossarm 7. One end of the suspension rod 8 is fixed to the building structure, and the other end passes through the strip fireproof board 6, the steel crossarm 7, and the gasket 32 ​​in sequence, and is finally fixed by bolts 13.

[0057] During construction, the present invention firstly manufactures the air duct 19 in sections. The outer side of the air duct 19 is covered with rock wool 12 and fixed with metal welding nails 10 to play a flame retardant role. The construction is laid out to determine the installation position of the air duct hanger 8. One end of the hanger 8 is fixed to the building structure, and the other end passes through the strip fireproof board 6, the steel cross arm 7, and the gasket 32 ​​in sequence. The steel cross arm 7 is hoisted at the designed position through the nut 14.

[0058] The plates of the pipe body fireproof panel fixing part 1 and the end fireproof panel fixing part 2 are cut and folded, and fixed into shape using the connecting piece 16 and the connecting belt 17. The lower groove is filled with rock wool 12 and installed on the air duct 19 as required, and fixed on the steel cross arm 7 together with the air duct 19.

[0059] Install the strip fireproof board 6 and the fireproof board 5 in sequence along one side of the air duct, and insert the strip fireproof board 6 and the fireproof board 5 into the rectangular horizontal grooves on the end fireproof board fixing piece 2 and the pipe body fireproof board fixing piece 1 according to the position, and complete the installation of the entire assembled fireproof air duct. The pipe body fireproof board fixing piece 1 and the end fireproof board fixing piece 2 are mainly used to fix the rock wool 12 and the fireproof board 5 wrapped outside the air duct 19. The pipe body fireproof board fixing piece 1 is suitable for connecting the fireproof board 5 with the fireproof board 5, and the end fireproof board fixing piece 2 is suitable for fixing the end strip fireproof board 6 and the fireproof board 5.

[0060] Based on the aforementioned fire protection regulations, the fire damper 28 also needs to meet the fire resistance requirements. Therefore, the present invention also performs fire protection design on the fire damper 28 and proposes an assembled fire damper.

[0061] like Figure 13-16As shown, the assembled fire damper includes a fire damper 28, rock wool 12 and a fireproof board 5, wherein flanges 30 are provided at both ends of the fire damper 28, and the flanges 30 have a number of holes, which can be connected to the flanges of the air duct 27, the flanges of the prefabricated fireproof ventilation sleeve 20 or the flanges of other air duct components (such as air duct regulating valves, air duct check valves, etc.) through bolts 13 and nuts 14. This patent takes the prefabricated fireproof ventilation sleeve 20 as an example, that is, one end of the fire damper 28 is connected to the prefabricated fireproof ventilation sleeve 20, and the other end is connected to the air duct. At the connection, a flame retardant sealing strip 15 is sandwiched between the two flanges. The outer side of the flange is wrapped with a tube body fireproof board fixing part 1 or an end fireproof board fixing part 2 according to different installation conditions, and rock wool 12 is filled between the tube body fireproof board fixing part 1 or the end fireproof board fixing part 2 and the flange. The outer side of the fire damper 28 is also wrapped with rock wool 12, and the outer side of the rock wool 12 is wrapped with a fireproof board 5, which plays a flame retardant role.

[0062] The pipe body fireproof board fixing piece 1 is suitable for connecting fireproof boards 5 with each other, and the end fireproof board fixing piece 2 is suitable for fixing the end strip fireproof board 6 and the fireproof board 5. When the assembled fire damper is connected to the air duct components such as the prefabricated fireproof ventilation sleeve 20, since the prefabricated fireproof ventilation sleeve 20 does not have an interface position for the socket fireproof board, the end fireproof board fixing piece 2 is used to ensure the flame retardant effect of the fire damper 28 while ensuring that the flame retardant layer of each air duct component can fit tightly; when the assembled fire damper is connected to the assembled fireproof air duct 27 and other air duct components with flanges, the pipe body fireproof board fixing piece 1 is used to fix the fireproof board 5 at the flange connection.

[0063] Three hinges 25 are provided at the intersection of the fireproof plate on the top of the fire damper 28 and the side fireproof plate covering the actuator of the fire damper 28. They are fixed to the fireproof plate 5 on the top of the fire damper 28 and the fireproof plate 5 on the side of the actuator by self-drilling screws 24, so that the fireproof plate 5 on the side of the actuator of the fire damper 28 can be opened and closed around the hinges 25.

[0064] A square hole is opened on the fireproof board 5 on the side of the fire damper 28 actuator, the size of the hole is slightly larger than the outer dimensions of the fire damper 28 actuator, and the side length of the hole is consistent with the length of the first angle connecting strip 26. The bottom plates of the four first angle connecting strips 26 are fixed to the fireproof board 5 around the square hole by drilling self-tapping screws 24. Four long strip fireproof boards are fixed to the side plates of the first angle connecting strip 26 by drilling self-tapping screws 24, and the length of the fireproof boards is consistent with the length of the first angle connecting strip 26. Make another rectangular fireproof board 5, the size of which is consistent with the size of the hole in the fireproof board 5 outside the fire damper 28 actuator, and fix one side of the four second angle connecting strips 26 to the four sides of the rectangular fireproof board 5 by drilling self-tapping screws 24 respectively, and fix the other side of the four second angle connecting strips 26 to the four long strips of fireproof boards installed on the first angle connecting strips 26 by drilling self-tapping screws 24, thereby forming an external protrusion to complete the fireproof board closure of the fire damper 28 actuator.

[0065] One side of the hinge 22 with a lock hole is fixed to the edge of the fireproof board 5 at the bottom of the fire damper 28 by drilling self-tapping screws 24, and the lock buckle 23 is fixed to the edge of the fireproof board 5 outside the actuator of the fire damper 28 by drilling self-tapping screws 24. The other side of the hinge 22 can be put on the lock buckle 23 through the lock hole, so that it can be locked on the lock buckle 23. The hinge 22 with a lock hole is a rectangular metal component that can be pivotally folded in the middle, with a long strip hole in the middle of one side, and the other side is fixed to the outer edge of the fireproof board 5 at the bottom of the fire damper 28 by drilling self-tapping screws 24. The lock buckle 23 is a rectangular metal component with a semicircular strip of metal welded in the middle. It is fixed to the bottom of the fireproof plate 5 outside the actuator of the fire damper 28 through four symmetrical holes with self-drilling self-tapping screws 24. It is used in conjunction with the hinge 22 with a lock hole, so that the semicircular strip of metal on the lock buckle 23 can pass through the strip of holes in the hinge 22 with a lock hole. The lock head can be hung on the semicircular strip of metal structure. After locking, the fire damper 28 can be prevented from being opened at will. The hinge 25 is a rectangular metal component with a foldable middle, and the two folding surfaces have four holes respectively.

[0066] The assembled fire damper also includes a trapezoidal connector 29, which is a rectangular metal strip bent four times into an approximate trapezoid, with two in total, and holes in the middle and the two ends of the bottom of the trapezoid. The bolt 13 passes through the bottom end of the trapezoidal connector 29, the top of the fire damper 28, and the nut 14 in sequence, and the trapezoidal connector 29 is fixed to the top of the fire damper 28 through the nut 14. The suspension rod 8 is a metal round rod, with two in total, one end of which is fixed to the building structure, and the other end passes through the fireproof board 5 on the top of the fire damper 28, the rock wool 12, the hole in the middle of the trapezoidal connector 29, and the nut 14 in sequence, and the trapezoidal connector 29 is suspended at the designed height through the nut 14.

[0067] like Figure 13-16As shown, the suspension rod is divided into two parts, upper and lower, and the lower suspension rod and the upper suspension rod are connected together by a threaded rod joint 33. Two steel pipes 34 are connected to one side of the fire damper 28 actuator. After the steel pipe 34 extends from one side of the fire damper 28 actuator structure, it bends downward 90 degrees and passes through the rock wool 12 and the fireproof board at the bottom of the fire damper 28 in sequence. The bending position is in an arc shape. The interior of the steel pipe 34 is used to lay the remote control wires and the manual reset wire.

[0068] In the present invention, in order to facilitate the operation and maintenance of the fire damper 28 actuator, the fireproof plate 5 on the side of the fire damper 28 actuator is designed to be openable. In addition, since the actuator protrudes from the surface layer of the air duct, the fireproof plate 5 is used to form an outer protrusion on its outside to wrap it.

[0069] The fire damper 28 actuator side fire plate 5 has two working modes. The first one (such as Fig.14 As shown), the fireproof panel is opened by the rotation of the hinge 25, and the fire damper 28 actuator can be inspected. The second method (as shown Fig.13 As shown), the fireproof board is closed by rotating the hinge 25, so that the semicircular long metal structure on the lock buckle 23 just passes through the long hole of the hinge 22 with a lock hole, and is locked with the lock 21 to prevent non-professionals from operating it.

[0070] Through the present invention, the air duct can not only meet the fire resistance requirements of the specification, but also improve the installation efficiency of the fireproof air duct and ensure the construction quality of the fireproof air duct. At the same time, it can also meet the fire protection requirements of the specification for fire damper components. At the same time, the installation operation is convenient and flexible, and the combination method is diverse, which can realize factory prefabrication and on-site assembly. There is no need to use fire or electricity at the construction site, and the assembled fire damper can be installed in place using simple handheld tools.

[0071] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An assembled fireproof air duct, comprising an air duct, rock wool, a fireproof board, and a fireproof board fixing member; characterized in that: The air duct is wrapped with rock wool; a fireproof board is installed on a part of the air duct extending outward from the wall, and the fireproof board is wrapped with rock wool; the fireproof board is fixed to the outside of the rock wool by multiple fireproof board fixings; the fireproof board fixings include tube body fireproof board fixings and end fireproof board fixings, wherein the end fireproof board fixings are arranged on the outermost side of the fireproof board away from the wall, or the end fireproof board fixings are respectively arranged on one side of the fireproof board adjacent to the wall and on the outermost side away from the wall; the remaining fireproof board fixings are tube body fireproof board fixings.

2. The assembled fireproof air duct according to claim 1, characterized in that: There are multiple fireproof plate fixings for the pipe body, and the length of the air duct is arranged in sequence at predetermined intervals.

3. The assembled fireproof air duct according to claim 1, characterized in that: The outer wall of the air duct is welded with welding nails, the top of the welding nails passes through the rock wool and then bends to fix the rock wool on the air duct.

4. The assembled fireproof air duct according to claim 1, characterized in that: The fireproof board fixing piece of the pipe body is unfolded into a rectangular plate. Funnel-shaped grooves are symmetrically arranged at a certain interval on the upper and lower long sides of the rectangular plate. The shapes and sizes of the grooves on the upper and lower sides are the same. There are 4 grooves on the upper and lower sides of the rectangular plate.

5. The assembled fireproof air duct according to claim 4, characterized in that: Three connecting pieces are provided on the end of one short side of the rectangular plate; two longitudinal slits are cut on the transverse extension lines of the three connecting pieces on the other side of the short side of the rectangular plate, the two longitudinal slits are arranged at a predetermined distance in the transverse direction, and the portion between the two longitudinal slits is extruded outward to form a connecting belt.

6. The assembled fireproof air duct according to claim 5, characterized in that: The pipe body fireproof board fixing part is a frame structure, and the frame structure is a rectangular frame. Three connecting pieces are respectively inserted into three connecting belts at the top of the upper frame of the rectangular frame and the two side walls of the upper frame, and are inserted from one end of the connecting belt and extended from the other end and folded.

7. The assembled fireproof air duct according to claim 6, characterized in that: There are three grooves in the single-sided cross-section of the frame structure, namely the lower groove and the left groove and the right groove arranged on the top of the lower groove. The left and right grooves are symmetrical and arranged back to back, the grooves are in opposite directions and are both arranged outwards, and the two bottom edges of the lower groove are each provided with an inward-turned folded edge; the grooves of the left and right grooves are respectively used to accommodate fireproof panels, and the lower groove is used to fill rock wool.

8. The assembled fireproof air duct according to claim 1, characterized in that: The end fireproof board fixing piece is a frame structure, and the single-sided cross-section of the frame structure has three grooves, namely the lower groove and the left groove and the right groove arranged on the top of the lower groove. The left and right grooves are symmetrical and arranged back to back, and the grooves are in opposite directions and are both arranged outward. The two bottom edges of the lower groove are each provided with an inward-turned folded edge; the groove of the right groove is used to accommodate the fireproof board; the upper side panel of the left groove extends out of the outer end of the lower groove and is folded downward to form a folded edge.

9. The assembled fireproof air duct according to claim 8, characterized in that: The folded edge is spaced a certain distance from the side wall of the lower groove and is used for inserting and fixing the strip fireproof board.

10. The assembled fireproof air duct according to claim 1, characterized in that: The assembled fireproof air duct also includes an assembled fireproof damper.

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