Roof rotating type building fire fighting device

Abstract

The utility model relates to the technical field of building fire extinguishing devices, and particularly discloses a roof rotating type building fire extinguishing device which comprises a supporting frame fixed on a roof, a cantilever beam support capable of horizontally rotating is installed on the supporting frame, a fire water monitor is arranged at one end of the cantilever beam support and electrically connected with a control system, and the control system is electrically connected with the cantilever beam support. Rotation of the cantilever beam support is controlled by a control system, the other end of the cantilever beam support is provided with a balance weight piece used for keeping balance of the cantilever beam support, the fire water monitor is connected with a water conveying pipe, the water conveying pipe is laid on the cantilever beam support and rotates along with the cantilever beam support, and the water conveying pipe is connected with an external water source through a fire water inlet pipe. The cantilever beam support is formed by assembling a plurality of frame type support units which can be quickly connected. The fire fighting device is simple in structure, the cantilever beam support is assembled in a modularized mode, field installation is fast, and construction time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of building fire extinguishing devices, in particular to a roof-rotating building fire extinguishing device. Background Art

[0002] The number of high-rise buildings in modern cities is rapidly increasing. Fires in high-rise buildings can easily cause major safety incidents, seriously affecting the safety of people and property. High-rise building fires have occurred frequently in recent years. Although the flame retardant properties of building insulation materials have been improved, insulation fires cannot be completely eliminated. Fires spread rapidly along the exterior walls of buildings, burning rapidly, creating large-scale fires that connect the inside and outside of the building in a short period of time. These fires are difficult to extinguish, and the spray height of ordinary fire trucks is difficult to reach when facing fires in super-high-rise buildings. To address the problem of high-rise building fire fighting, some high-rise buildings have installed firefighting equipment on the roof of the building. These firefighting equipment are equipped with fire monitors, which are connected to roof water tanks and the building's sprinkler system as a source of firefighting water. Chinese utility model patent CN218923654U discloses a rotating building facade fire-fighting device, whose structure includes two layers of rotating brackets, one layer of brackets controls the overall extension position of the device, and the other layer of brackets controls the specific angle of the fire water monitor; Chinese utility model patent CN219110724U discloses a sliding building facade fire-fighting device, the fixed bracket is telescopic and adjusts the specific position of the fire water monitor. These two types of building fire-fighting devices have relatively complex structures and are difficult to produce and install. Utility Model Content

[0003] The utility model aims to solve the problem of difficulty in extinguishing fire after a fire occurs on the facade of a high-rise building, and provides a roof-rotating building fire-fighting device which is installed on the roof of the building and has a simple, firm structure and can be quickly installed.

[0004] In order to solve the above technical problems, the utility model includes a support frame fixed on the roof, and a cantilever beam bracket that can rotate horizontally is installed on the support frame. A fire water monitor is provided at one end of the cantilever beam bracket, and the fire water monitor is electrically connected to the control system. The other end of the cantilever beam bracket is provided with a counterweight for maintaining the balance of the cantilever beam bracket. The fire water monitor is connected to a water pipe, and the water pipe is laid on the cantilever beam bracket and rotates with the cantilever beam bracket. The water pipe is connected to an external water source through a fire water pipe. Its structural features are: the cantilever beam bracket is a frame structure, and the cantilever beam bracket is assembled from a plurality of frame bracket units that are quickly connected.

[0005] After adopting the above structure, the fire-fighting device includes a fire-fighting water monitor and a control system. The fire-fighting water monitor is connected to a water pipe, which is connected to an external water source through a fire-fighting water pipe. The water pipe is laid on a cantilever beam bracket, and the fire-fighting water monitor is arranged at one end of the cantilever beam bracket. The cantilever beam bracket can rotate horizontally on the support frame. When the cantilever beam bracket rotates, the water pipe and the fire-fighting water monitor rotate accordingly. The device structure is simple. The cantilever beam bracket adopts a frame structure and is assembled from a plurality of frame bracket units that can be quickly connected. The cantilever beam bracket extends outward from the support frame. The frame-type cantilever beam bracket has high strength and strong bending resistance. The cantilever beam bracket is assembled from frame bracket units. The number of frame bracket units required can be determined according to the design length of the cantilever beam bracket. During on-site installation, the frame bracket units are assembled into a cantilever beam bracket. The cantilever beam bracket is quickly connected, which shortens the installation construction time and improves the installation efficiency. When a fire occurs, the control system controls the cantilever beam bracket to rotate horizontally, so that the fire water monitor moves to a suitable position close to the burning flame, and the control valve of the fire water monitor is opened to spray water to the fire to extinguish the fire.

[0006] The two ends of the frame-type bracket unit are polygonal frames formed by connecting a plurality of side beams, and the polygonal frames at the two ends are fixedly connected by a plurality of reinforcing ribs.

[0007] The polygonal frame is in the shape of a triangle, a quadrilateral or a pentagon.

[0008] The polygonal frame is a triangle, and the frame-type bracket unit includes a bracket unit upper beam and two bracket unit lower beams that are arranged at the three vertices of the triangle and are parallel to each other. The two ends of the three beams are respectively fixedly connected to the triangular frame. There are also multiple reinforcing ribs fixedly connected to the side beams between the triangular frames at both ends to increase the strength of the frame.

[0009] The upper crossbeams of the bracket units and the lower crossbeams of the bracket units corresponding to two adjacent frame-type bracket units are plugged in, and the triangular frames at the ends of the two adjacent frame-type bracket units are detachably connected.

[0010] The upper crossbeam of the bracket unit and the lower crossbeam of the bracket unit are both tubular bodies. One end of the crossbeam of the frame-type bracket unit is fixedly connected with a connecting pin that protrudes outward and can be inserted into the corresponding crossbeam of the adjacent frame-type bracket unit.

[0011] The three side beams of the triangular frame are all provided with a plurality of through holes, and two adjacent frame-type bracket units are connected by a combination of bolts and nuts passing through the corresponding through holes on the two adjacent triangular frames.

[0012] The cantilever beam bracket is provided with a pull rod structure to prevent the two ends of the cantilever beam bracket from sagging. The pull rod structure includes two pulling points fixedly connected to the upper beam of the bracket unit. The two pulling points are arranged close to the two ends of the cantilever beam bracket. The pull rod structure also includes a balance fulcrum fixedly connected to the upper beam of the bracket unit at the rotation point of the cantilever beam bracket. The two pulling points are connected to the balance fulcrum through a pull rod, and the two ends of the pull rod are hinged to the pulling point and the balance fulcrum respectively.

[0013] The support frame is provided with a rotatable rotating mechanism, the rotating mechanism is fixedly connected to the cantilever beam bracket, the rotating mechanism is driven to rotate by a motor, and the motor is electrically connected to the control system.

[0014] The water delivery pipe is connected to the fire water supply pipe via a universal swivel joint, and the axis of rotation of the water delivery pipe is the same as the axis of rotation of the cantilever beam support.

[0015] The electric-controlled fire-fighting water cannon and the water pipe for conveying water of the fire-fighting device of the utility model are installed on the cantilever beam bracket. The cantilever beam bracket is assembled from a plurality of frame-type bracket units that can be quickly connected. The structure is simple, the on-site installation and construction of the cantilever beam bracket is fast, the assembly efficiency is high, and the number of frame-type bracket units and the length of the cantilever beam bracket can be adjusted according to needs, and the adaptability is strong; the frame-type bracket unit is a frame-type structure with a triangular cross-section and is provided with reinforcing ribs. The triangular structure is firm and not easy to deform. The crossbeam connection of two adjacent frame-type bracket units is provided with a connecting pin, which increases the shear strength of the cantilever beam bracket and the cantilever beam bracket is not easy to bend; a pull rod structure and a counterweight are provided on the cantilever beam bracket to keep the cantilever beam bracket balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the fire-fighting device of the present utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fire-fighting device of the present invention without showing the cantilever beam, counterweight, and pull rod structure;

[0018] Figure 3 is a perspective view of a cantilever beam support section;

[0019] Figure 4 It is a structural diagram of a frame-type bracket unit;

[0020] Figure 5 A schematic diagram of a connection method for frame-type bracket units;

[0021] Figure 6 Schematic diagram of another connection method of the frame-type bracket unit;

[0022] Figure 7This is a schematic diagram of the connection between the water supply pipe and the fire water pipe;

[0023] In the figure: 1. Cantilever beam bracket; 11. Frame-type bracket unit; 111. Upper crossbeam of bracket unit; 112. Lower crossbeam of bracket unit; 113. Triangular frame; 114. Reinforcement rib; 115. Groove; 116. Through hole; 117. Connecting pin; 118. Plug; 119. Slot; 2. Water pipe; 21. Electric-controlled fire water monitor; 22. First flange; 3. Counterweight; 4. Balance fulcrum; 41. First pull rod; 411. First end pull point; 42. Second pull rod; 421. Second end pull point; 5. Support leg; 51. Support leg fixing plate; 6. Oblique cable; 7. Fire water pipe; 71. Second flange; 8. Fixed base; 81. Fixed plate; 9. Motor; 91. Rotating shaft fixing plate; 92. Rotating shaft; 10. Turntable; 101. Rotating fixing plate; 12. Flange-connected universal swivel joint; 13. Bolt and nut assembly. DETAILED DESCRIPTION

[0024] Reference Figure 1-7 A roof-mounted rotating fire-fighting device for buildings includes a support frame fixedly mounted on the roof of a building, a bracket capable of horizontal rotation mounted on the support frame, a fire-fighting water pipeline and a fire-fighting water monitor mounted on the bracket, and a control system (not shown in the figure) for controlling the rotation of the bracket and the spraying of water by the fire-fighting water monitor. Figure 1 、 2 As shown in , 7, the support frame includes a plurality of legs 5, the bottom of the leg 5 is fixedly connected with a leg fixing plate 51 for fixing the leg 5, the top of the leg 5 is fixedly connected to the fixed base 8, the fixed base 8 is fixedly connected with a fixed disk 81, and a part of the top area of ​​the leg 5 is fixedly connected to the fixed disk 81, which can increase the connection strength of the fixed base 8 and the fixed disk 81. Of course, the leg 5 can also be fixedly connected to the fixed base 8 only. A plurality of inclined wires 6 are provided around the support frame to prevent the support frame from tilting. The inclined wire 6 can be made of steel wire rope, one end of the inclined wire 6 is connected to the fixed base 8, and the other end of the inclined wire 6 is connected to a fixed object on the roof. The inclined wires 6 in different directions generate pulling forces in different directions on the support frame to prevent the support frame from tilting to one side or even falling due to wind or uneven external force.

[0025] Reference Figure 1 、 3-6. The bracket for installing the fire water pipeline and the fire water monitor is a cantilever beam bracket 1. The cantilever beam bracket 1 is installed on the support frame. A fire water monitor is provided at one end of the cantilever beam bracket 1. The fire water monitor is electrically connected to the control system. The fire water monitor is connected to the water pipe 2. The water pipe 2 is laid on the cantilever beam bracket 1 along the length direction of the cantilever beam bracket 1. A counterweight 3 is provided at the other end of the cantilever beam bracket 1 to balance the weight at both ends of the connection between the cantilever beam bracket 1 and the support frame. The cantilever beam bracket 1 remains balanced, and the support frame is force-balanced and not easy to tilt. Specifically, the fire water monitor adopts an electrically controlled fire water monitor 21. The fire water monitor and the water pipe 2 are fixed to the cantilever beam bracket 1 with clamps such as pipe clamps (not shown in the figure). The fire water monitor and the water pipe 2 can move with the cantilever beam bracket The rack 1 rotates horizontally together. The electric fire-fighting water cannon 21 is a commercially available product. The electric fire-fighting water cannon 21 includes a nozzle, a pipe, an electric control valve and other parts. Some are also equipped with a detector, which can automatically identify the location of the fire, automatically control the electric control valve to open, and adjust the nozzle angle according to the location of the fire to spray water toward the fire. The electric fire-fighting water cannon 21 can be manually controlled or automatically controlled. It can be controlled by a control system (i.e., a host computer), or it can be remotely controlled by a control box (wireless, on-site remote control of the electric fire-fighting water cannon 21) at the fire scene. In automatic mode, the electric control valve is automatically opened according to the fire location detected by the detector. The nozzle is swingable and automatically swings toward the fire to spray water. This belongs to the existing technology in this field and will not be described in detail here. Figure 1 、 3 -6, the cantilever beam bracket 1 is a frame structure, which is assembled from a plurality of frame bracket units 11 that can be quickly connected. The two ends of the frame bracket unit 11 are polygonal frames connected by a plurality of side beams, that is, the cross section of the frame bracket unit 11 is polygonal. The cross section here refers to the cross section perpendicular to the length direction of the cantilever beam bracket 1. The polygonal frame is triangular, quadrilateral or pentagonal. The polygonal frames at both ends are fixedly connected by a plurality of reinforcing ribs. The reinforcing ribs firmly connect the polygonal frames at both ends to form a stable frame structure; Figure 3 、 4As shown, the multi-deformable frame is a triangle, preferably an equilateral triangle. The triangular structure is firm and not easy to deform. The frame-type bracket unit 11 includes three parallel beams arranged at the three vertices of the triangle. Specifically, there is an upper bracket unit beam 111 on the top and two lower bracket unit beams 112 on the bottom. The two ends of the three beams are fixedly connected to the triangular frames 113 respectively, and the two triangular frames 113 fix the relative positions of the three beams. In order to increase the strength and stability of the frame-type bracket unit 11, the two triangular frames 113 at both ends of the beam are connected by reinforcing ribs 114. Specifically, one end of the reinforcing rib 114 is fixedly connected to the side beam of a triangular frame 113, and the other end of the reinforcing rib 114 is fixedly connected to the side beam corresponding to the triangular frame 113. The length direction of the reinforcing rib 114 is inclined with the length direction of the beam. The inclination here means that the reinforcing rib 114 is not parallel to the beam, such as Figure 3-6 As shown, the end of the reinforcing rib 114 is connected to the connection between the triangular frame 113 and the crossbeam, which has a better reinforcing effect on the triangular frame 113. The crossbeam and the reinforcing rib 114 can be regarded as reinforcing rib plates. The water pipe 2 is supported on the bottom edge beam of the triangular frame 113, as shown in FIG. Figure 3 、 4 As shown, a groove 115 for placing the water pipe 2 is provided on the bottom side beam of the triangular frame 113, which facilitates the laying and installation of the water pipe 2. The upper crossbeams 111 of the bracket units corresponding to the two adjacent frame-type bracket units 11 and the lower crossbeams 112 of the bracket units are all plug-in, and the triangular frames 113 at the ends of the two adjacent frame-type bracket units 11 are detachably connected to achieve a detachable and quick connection between the two adjacent frame-type bracket units 11. The upper crossbeams 111 and the lower crossbeams 112 of the bracket units are all made of round tubes. Of course, other shapes of tubes such as square tubes can also be used, such as Figure 5 As shown, one end of the crossbeam of the frame bracket unit 11 is fixedly connected with a connecting pin 117. Specifically, a part of the connecting pin 117 is inserted into the crossbeam and welded to the crossbeam, and the remaining part protrudes outward. When two frame bracket units 11 are connected, the protruding part of the connecting pin 117 is inserted into the crossbeam corresponding to the adjacent frame bracket unit 11. The connecting pin 117 enhances the bending and shear strength of the cantilever beam bracket 1 and facilitates the connection of the frame bracket unit 11. When the connecting pin 117 is inserted into the adjacent frame bracket unit 11, the relative positions of the two frame bracket units 11 are pre-fixed. The crossbeam of the frame bracket unit 11 can also be used as shown in the figure. Figure 6 Other plug-in methods shown in the figure, such as a larger-diameter slot 119 at one end of the beam and a plug 118 protruding outward at the other end of the beam, can be plugged into the slot 119 to achieve the beam. Figure 3-6As shown, a plurality of through holes 116 are provided on the three side beams of the triangular frame 113, and two adjacent frame-type bracket units 11 are detachably connected by a bolt and nut combination 13. Specifically, the bolts pass through the corresponding through holes 116 on the two adjacent triangular frames 113, and then the two frame-type bracket units 11 are locked with nuts.

[0026] Reference Figure 1 The cantilever beam bracket 1 is provided with a pull rod structure to prevent the two ends of the cantilever beam bracket 1 from sagging. The pull rod structure includes two pulling points fixedly connected to the upper crossbeam 111 of the bracket unit. The first end pulling point 411 is set at one end close to the electric-controlled fire water monitor 21, and the second end pulling point 421 is set at one end close to the counterweight 3. The pull rod structure also includes a balance fulcrum 4 fixedly connected to the upper crossbeam 111 of the bracket unit. Specifically, the balance fulcrum 4 is fixedly connected to the upper crossbeam 111 of the bracket unit at the rotation point of the cantilever beam bracket 1. Because the cantilever beam bracket 1 is supported at the rotation point, a first pull rod 41 is provided between the first end pull point 411 and the balance fulcrum 4, a second pull rod 42 is provided between the second end pull point 421 and the balance fulcrum 4, one end of the first pull rod 41 is hinged to the first end pull point 411, the other end of the first pull rod 41 is hinged to the balance fulcrum 4, one end of the second pull rod 42 is hinged to the second end pull point 421, the other end of the second pull rod 42 is hinged to the balance fulcrum 4, the pull rod structure can prevent the two ends of the cantilever beam bracket 1 from sagging, so that the cantilever beam bracket 1 remains horizontal.

[0027] Reference Figure 1 、 2 7. The water pipe 2 is connected to the fire water pipe 7, which is connected to an external water source (not shown in the figure). Fire water enters the fire water monitor through the fire water pipe 7 and the water pipe 2. The external water source is generally a roof water tank and / or a building sprinkler system. In order to ensure the pressure of the fire water monitor, a fire pump is also provided on the external water source pipeline. The external water source does not fall within the scope of protection of the present utility model. The support frame is provided with a rotating mechanism fixedly connected to the cantilever beam support 1. The rotating mechanism is driven to rotate by a motor 9. The motor 9 is electrically connected to the control system (i.e., the host). When the motor 9 drives the rotating mechanism to rotate, the cantilever beam support 1 rotates accordingly. Figure 7The rotating mechanism shown in the figure includes a rotating shaft fixing plate 91, the rotating shaft fixing plate 91 is fixedly connected to the fixed plate 81, a rotating shaft 92 is provided on the side of the rotating shaft fixing plate 91, the rotating shaft 92 is dynamically connected to the power output shaft of the motor 9, a turntable 10 connected to the rotating shaft 92 is provided in the rotating shaft fixing plate 91, the rotating shaft 92 and the turntable 10 can adopt a worm gear transmission method, when the motor 9 is running, the turntable 10 is driven by the rotating shaft 92 to rotate horizontally in the rotating shaft fixing plate 91, in order to facilitate rotation, a bearing can also be provided between the turntable 10 and the rotating shaft fixing plate 91, which is not shown in the figure. This is a conventional practice in this field and is not described in detail here. A rotating fixed plate 101 is fixedly connected to the top of the turntable 10, and the turntable 1 0 rotates, the rotating fixed plate 101 rotates at the same time, and the rotating fixed plate 101 is fixedly connected to the cantilever beam bracket 1. Specifically, the lower crossbeam 112 of the bracket unit is fixedly connected to the rotating fixed plate 101, so that the cantilever beam bracket 1 rotates synchronously with the rotating fixed plate 101 and the turntable 10. When a fire occurs, the control system controls the motor 9 to start, and the cantilever beam bracket 1 rotates, so that the fire monitor rotates to a suitable position close to the fire. Normally, the cantilever beam bracket 1 does not extend outward to the outside of the building facade. When a fire occurs, the cantilever beam bracket 1 rotates and extends outward to the outside of the building facade. After the fire is extinguished, the cantilever beam bracket 1 rotates back to the inside of the building facade, even if the cantilever beam bracket 1 is located above the roof and does not extend outside the building facade. Figure 7 As shown, the water pipe 2 and the fire water pipe 7 are connected through a universal swivel joint, specifically a flange-connected universal swivel joint 12. The water pipe 2 is connected to one flange of the flange-connected universal swivel joint 12 through a first flange 22, and the fire water pipe 7 is connected to the other flange of the flange-connected universal swivel joint 12 through a second flange 71. The flange-connected universal swivel joint 12 is a commercially available product, which can realize relative rotation of the two joints. Its structural principle is the existing technology, and reference can be made to patents such as CN202381885U. The fire water pipe 7 is connected to an external water source, and the fire water pipe 7 is fixed. The water pipe 2 rotates with the cantilever beam bracket 1, and the water pipe 2 and the fire water pipe 7 realize relative rotation through the universal swivel joint. The axis of the water pipe 2 when rotating is the same as the axis of the cantilever beam bracket 1 when rotating.

[0028] Working process: Determine the length of the cantilever beam support 1 and the number of frame support units 11 according to the building height and actual needs. The frame support units 11 are assembled at the factory, and then the separated frame support units 11 are transported to the site for installation. Alternatively, two or more frame support units 11 can be pre-connected before leaving the factory and then transported to the site to save installation time. The support frame of the fire-fighting device is installed close to the parapet of the roof. During installation, a foundation for fixing the support frame is usually prefabricated on the roof surface. Bolt holes are reserved in the foundation, and the support frame is fixed with anchor bolts passing through the support leg fixing plate 51. Embedded parts can also be set on the foundation, and the support leg fixing plate 51 is welded to the embedded parts to fix the support frame. Then, the end of the diagonal cable 6 is connected to the fixed object on the roof. Specifically, a fixed ring can be set on the roof surface to connect with the diagonal cable 6. Install the rotating mechanism on the support frame, and fix one frame support unit 11 to the rotating fixing plate 101, and then the frame support The frame units 11 are connected in sequence to form a cantilever beam bracket 1. When connecting, the connecting pin 117 is inserted into the corresponding crossbeam of the adjacent frame bracket unit 11, and then the two frame bracket units 11 are firmly connected together with the bolt and nut combination 13. The connecting pin 117 enhances the bending and shear resistance of the cantilever beam bracket 1. After the connecting pin 117 is inserted, the positions of the two adjacent frame bracket units 11 are fixed, which is convenient for locking and connecting. During installation, temporary support is used to lift the end of the cantilever beam bracket 1 to prevent sagging. The cantilever beam bracket 1 adopts a modular assembly method, which is quick and convenient to connect, saving construction and installation time. The length of the cantilever beam bracket 1 is controlled by the number of frame bracket units 11, and it has strong adaptability. After the cantilever beam bracket 1 is connected, the water pipe 2, the electric-controlled fire water cannon 21, the counterweight 3, the pull rod structure, etc. are installed on the cantilever beam bracket 1, and the water pipe 2 is connected to the fire water pipe 7 through the flange connection universal swivel joint 12, and the fire water pipe 7 is connected to the external water source. Normally, the cantilever beam support 1 of the fire-fighting device does not extend beyond the building facade, that is, it is located just above the roof inside the parapet; when a fire occurs, the control system starts the motor 9 to rotate the cantilever beam support 1 and extend it out of the building facade. When the fire water monitor runs to a suitable position close to the fire, the cantilever beam support 1 stops rotating, and the electric-controlled fire water monitor 21 can be automatically controlled or remotely controlled by a control system or a control box. The electric-controlled valve on the electric-controlled fire water monitor 21 is opened, and the nozzle sprays water outward. The nozzle is swingable, and the direction of the water spray is automatically or manually controlled to extinguish the fire.

[0029] The fire-fighting device of the utility model has a simple structure, and the cantilever beam bracket adopts a modular assembly method, which is easy and quick to install, saving on-site construction time; the cantilever beam bracket adopts a frame structure with high mechanical strength and is not easy to deform. Connecting pins are provided at the connections between adjacent frame units, which enhances the strength and bending and shearing resistance of the cantilever beam bracket.

Claims

1. A roof-mounted rotating fire-fighting device for a building, comprising a support frame fixed on a roof, a cantilever beam support (1) capable of horizontal rotation being mounted on the support frame, a fire-fighting water monitor being provided at one end of the cantilever beam support (1), the fire-fighting water monitor being electrically connected to a control system, the rotation of the cantilever beam support (1) being controlled by the control system, a counterweight (3) being provided at the other end of the cantilever beam support (1) for maintaining the balance of the cantilever beam support (1), the fire-fighting water monitor being connected to a water pipe (2), the water pipe (2) being laid on the cantilever beam support (1) and rotating with the cantilever beam support (1), the water pipe (2) being connected to an external water source via a fire-fighting water pipe (7), and characterized in that: The cantilever beam support (1) is a frame-type structure, and the cantilever beam support (1) is assembled from a plurality of quickly connected frame-type support units (11).

2. The rooftop rotating building fire fighting device according to claim 1, characterized in that: The two ends of the frame-type bracket unit (11) are polygonal frames formed by connecting a plurality of side beams, and the polygonal frames at the two ends are fixedly connected by a plurality of reinforcing ribs.

3. The rooftop rotating building fire fighting device according to claim 2, characterized in that: The polygonal frame is in the shape of a triangle, a quadrilateral or a pentagon.

4. The rooftop rotating building fire fighting device according to claim 3, characterized in that: The polygonal frame is triangular, and the frame-type bracket unit (11) includes a bracket unit upper crossbeam (111) and two bracket unit lower crossbeams (112) arranged at three vertices of the triangle and parallel to each other. The two ends of the three crossbeams are respectively fixedly connected to the triangular frame (113). A plurality of reinforcing ribs (114) fixedly connected to the side beams for increasing the strength of the frame are further provided between the triangular frames (113) at the two ends.

5. The rooftop rotating building fire fighting device according to claim 4, characterized in that: The bracket unit upper beams (111) and bracket unit lower beams (112) corresponding to two adjacent frame-type bracket units (11) are plugged in, and the triangular frames (113) at the ends of the two adjacent frame-type bracket units (11) are detachably connected.

6. The rooftop rotating building fire fighting device according to claim 5, characterized in that: The upper crossbeam (111) of the bracket unit and the lower crossbeam (112) of the bracket unit are both tubular bodies, and one end of the crossbeam of the frame-type bracket unit (11) is fixedly connected to a connecting pin (117) that protrudes outward and can be inserted into the corresponding crossbeam of the adjacent frame-type bracket unit (11).

7. The rooftop rotating building fire fighting device according to claim 6, characterized in that: The three side beams of the triangular frame (113) are all provided with a plurality of through holes (116), and two adjacent frame-type bracket units (11) are connected by a bolt and nut assembly (13) that passes through the corresponding through holes (116) on the two adjacent triangular frames (113).

8. The rooftop rotating building fire fighting device according to claim 7, characterized in that: The cantilever beam bracket (1) is provided with a pull rod structure for preventing the two ends of the cantilever beam bracket (1) from sagging. The pull rod structure includes two pulling points fixedly connected to the upper cross beam (111) of the bracket unit. The two pulling points are arranged near the two ends of the cantilever beam bracket (1). The pull rod structure also includes a balance fulcrum (4) fixedly connected to the upper cross beam (111) of the bracket unit at the rotation point of the cantilever beam bracket (1). Both of the pulling points are connected to the balance fulcrum (4) through the pull rod, and the two ends of the pull rod are hinged to the pulling point and the balance fulcrum (4) respectively.

9. The rooftop rotating building fire fighting device according to claim 8, characterized in that: The support frame is provided with a rotatable rotating mechanism, the rotating mechanism is fixedly connected to the cantilever beam support (1), the rotating mechanism is driven to rotate by a motor (9), and the motor (9) is electrically connected to a control system.

10. The rooftop rotating building fire fighting device according to claim 9, characterized in that: The water delivery pipe (2) and the fire water supply pipe (7) are connected via a universal swivel joint, and the axis of rotation of the water delivery pipe (2) is the same as the axis of rotation of the cantilever beam support (1).

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