A large-flow multifunctional smoke exhaust device

Abstract

The present invention relates to the field of fire smoke exhaust processing technology, specifically a large-flow multifunctional smoke exhaust device, including a main air duct mechanism, a side air duct mechanism and an air duct connected to the side air duct mechanism, and also including a smoke exhaust tail car mechanism, which is fixedly connected to the end of the air duct; the smoke exhaust tail car mechanism includes a smoke exhaust pipe assembly, and the smoke exhaust pipe assembly includes a smoke exhaust pipe body, the interior of the smoke exhaust pipe body is movably installed with a central water guide pipe, and the surrounding side of the central water guide pipe is provided with a water guide ring pipe and a nozzle component. The jets ejected by the several nozzle components at the air inlet position of the smoke exhaust pipe body of the present invention can form a jet network covering the entire area of ​​the air inlet. Through the impact of the jet, debris in the airflow during negative pressure smoke exhaust can be flushed away from the airflow path, avoiding debris from entering the air duct and causing an impact, and at the same time avoiding debris from being adsorbed on the air inlet and affecting the air volume; in addition, the airflow can drive the central water guide pipe and the nozzle component to rotate, further improving the coverage effect of the jet network on the air inlet.

Description

Technical Field

[0001] The present invention relates to the technical field of fire smoke exhaust, in particular to a large-flow multifunctional smoke exhaust device. Background Art

[0002] With the continuous acceleration of urbanization, various large-scale fires and dangerous chemical leaks occur frequently. These accidents are often accompanied by large amounts of flammable, explosive, and toxic gases and smoke, which pose a huge threat to personnel and the surrounding environment, and bring great difficulties and risks to fire fighting and on-site rescue. Currently, the most effective firefighting measure is to use large-scale positive or negative pressure smoke exhaust devices with fine water mist to quickly exhaust smoke or force ventilation from the fire scene. Smoke exhaust devices typically consist of a main fan, side fans, and air ducts. The fan can exhaust smoke or ventilate the fire scene along the air duct. Due to the complex fire environment, the air duct openings are usually protected to prevent debris from being drawn into the air duct during smoke exhaust.

[0003] For example, patent publication number CN220892469U discloses a liftable smoke exhaust duct device for a smoke exhaust fire truck, comprising a smoke exhaust duct detachably connected to a lift bracket. The smoke exhaust duct includes an air duct with a filter fixedly connected to one end. The lift bracket is driven by a scissor-shaped bracket to raise the smoke exhaust duct, thereby raising it to a certain distance from the ground and reducing the possibility of debris being drawn into it.

[0004] As in the prior art of the above-mentioned patent, the height of the air duct is adjusted by a bracket, and a filter is installed at the end of the air duct, which can reduce the intake of debris to a certain extent. However, due to the rising effect of the fire and the air flow disturbance during negative pressure ventilation, there will still be debris floating in the air and being sucked into the air duct, such as plastic bags and other lightweight debris. Although the air duct end is provided with a filter, if the filter aperture is large, it will not have a blocking effect, and lightweight debris can easily enter the air duct, causing fan entanglement and other situations; if the filter aperture is small, lightweight debris can easily be adsorbed on the filter due to negative pressure, reducing the air intake. Therefore, there is an urgent need for a large-flow multifunctional smoke exhaust device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-flow multifunctional smoke exhaust device to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a large-flow multifunctional smoke exhaust device, comprising a main air duct mechanism, a side air duct mechanism, and an air duct connected to the side air duct mechanism, and also comprising a smoke exhaust tail car mechanism fixedly connected to the end of the air duct;

[0007] The smoke exhaust tail car mechanism includes a smoke exhaust pipe assembly, and the smoke exhaust pipe assembly includes a smoke exhaust pipe body, a central water pipe is movably installed inside the smoke exhaust pipe body, a water guide ring pipe and a nozzle component are arranged on the circumference of the central water guide pipe, and the central water guide pipe is connected to the nozzle component through the water guide ring pipe;

[0008] The central water pipe is provided with a spiral blade on the outside, and the spiral blade is driven by the airflow in the smoke exhaust pipe body to drive the central water pipe and the nozzle component to rotate; the central water pipe can supply water to the nozzle component and make the water spray out in a jet shape along the nozzle component. The jet sprayed by the nozzle component can form a jet net around the central water pipe and cover the entire area of ​​the exhaust port of the smoke exhaust pipe body. The jet net can flush debris carried in the airflow away from the airflow path.

[0009] Preferably, the smoke exhaust tail car mechanism further includes a lifting bracket assembly, which is fixedly mounted on the bottom of the smoke exhaust pipe assembly, and the lifting bracket assembly can adjust the height of the smoke exhaust pipe assembly.

[0010] Preferably, a rotary joint is detachably mounted on one end of the central water pipe away from the nozzle component, and a water supply pipe is detachably mounted on the rotary joint, with one end of the water supply pipe extending to the outside of the smoke exhaust pipe body.

[0011] Preferably, the exterior of the central water conduit is provided with evenly distributed spiral blades, and the spiral blades are driven by the airflow inside the smoke exhaust pipe body to drive the water conduit ring pipe and the central water conduit to rotate.

[0012] Preferably, one end of the central water pipe close to the nozzle component is threadedly connected to a straightening rod, and the jet ejected from the nozzle component is tangent to the straightening rod.

[0013] Preferably, the nozzle component includes a mounting seat, which is fixedly mounted on the water guide ring pipe, a water guide seat is hinged in the mounting seat, and one end of the water guide seat is threadedly connected to the high-pressure nozzle, and the other end is provided with a quick-connect connector.

[0014] Preferably, the nozzle of the high-pressure nozzle faces the inner side of the smoke exhaust pipe body, and the center axis of the high-pressure nozzle is arranged to deviate from the axis of the rectifying rod.

[0015] Preferably, one side of the mounting seat is in an open state, and the other side is provided with a limiting portion that cooperates with the water guide seat, and a reset torsion spring is clamped at the bottom of the hinged position between the water guide seat and the mounting seat.

[0016] Preferably, a transmission gear is fixedly sleeved on the top of the hinged position between the water guide seat and the mounting seat, and a mounting ring is fixedly sleeved on one end of the smoke exhaust pipe body close to the nozzle component, and a shifting tooth is provided on the inner side of the mounting ring.

[0017] Preferably, the transmission gear of the nozzle component can engage with the shifting gear during the rotation process, thereby shifting the water guide seat to deflect, so that the central axis of the high-pressure nozzle faces the central axis of the rectifying rod.

[0018] In the above technical solution, the beneficial effect of the present invention is that the jets ejected from the several nozzle components at the air inlet position of the smoke exhaust pipe body can form a jet network covering the entire area of ​​the air inlet. Through the jet impact, the debris in the airflow during negative pressure smoke exhaust can be flushed away from the airflow path, avoiding the debris from entering the wind tube and causing an impact, and at the same time avoiding the debris from being adsorbed at the air inlet and affecting the air volume; in addition, the airflow can drive the central water guide pipe and the nozzle components to rotate, further improving the covering effect of the jet network on the air inlet, and effectively flushing the debris away from the airflow path.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention after overall assembly;

[0023] Figure 2 This is a schematic structural diagram of the connection between the main air duct mechanism and the lifting and rotating mechanism of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the entire lifting and rotating mechanism of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the automatic docking mechanism of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the entire lifting bracket assembly of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the overall smoke exhaust pipe assembly of the present invention;

[0028] Figure 7 Schematic diagram of the structure of the axial section of the smoke exhaust pipe assembly of the present invention;

[0029] Figure 8This is a structural schematic diagram of the end portion of the smoke exhaust pipe assembly of the present invention;

[0030] Figure 9 This is a structural schematic diagram of the installation position of the nozzle component of the present invention;

[0031] Figure 10 It is a schematic structural diagram of the nozzle component of the present invention;

[0032] Figure 11 It is a structural schematic diagram of the cross section of the mounting base of the present invention;

[0033] Figure 12 This is a schematic structural diagram of the mounting ring of the present invention;

[0034] Figure 13 For the present invention Figure 7 Schematic diagram of the structure enlarged at point A.

[0035] Description of reference numerals:

[0036] In the figure: 1. Fire truck frame; 2. Main air duct mechanism; 3. Lifting and rotating mechanism; 4. Side air duct mechanism; 5. Automatic docking mechanism; 6. Air duct;

[0037] 7. Smoke exhaust tail car mechanism; 71. Smoke exhaust pipe assembly; 711. Smoke exhaust pipe body; 712. Mounting arm; 713. Center water pipe; 714. Spiral blade; 715. Water guide ring pipe; 716. Nozzle component; 7161. Mounting seat; 7162. Water guide seat; 7163. High-pressure nozzle; 7164. Reset torsion spring; 7165. Transmission gear; 7166. Quick connector; 717. Mounting ring; 7171. Gear; 718. Rotary joint; 719. Water supply pipe; 72. Lifting bracket assembly. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0039] See also Figure 1-13 The embodiment of the present invention provides a technical solution: a large-flow multifunctional smoke exhaust device, comprising a main air duct mechanism 2, a side air duct mechanism 4, and an air duct 6 connected to the side air duct mechanism 4, and also comprising a smoke exhaust tail car mechanism 7, which is fixedly connected to the end of the air duct 6;

[0040] The present application discloses a large-flow multifunctional smoke exhaust device, which also includes a fire truck frame 1. A lifting and rotating mechanism 3 is provided at the rear of the top of the fire truck frame 1. The main air duct mechanism 2 is fixedly installed on the top of the lifting and rotating mechanism 3. The main air duct mechanism 2 and the lifting and rotating mechanism 3 are both existing technologies. The lifting and rotating mechanism 3 can realize the lifting, pitching and rotation adjustment of the main air duct mechanism 2. A number of fans are provided in the main air duct mechanism 2, which can be independently controlled by the control system to realize the adjustment of the air volume; after the smoke is discharged from the tail of the main air duct mechanism 2, the diffusion range is large and the smoke concentration is also large, which will have an adverse effect on the body and vision of nearby operators. A circle of nozzles is provided at the tail of the main air duct mechanism 2 for spraying water on the smoke extracted by negative pressure, which plays a role in accelerating the condensation of smoke water; the number of side air duct mechanisms 4 is two groups , and two sets of side duct mechanisms 4 are fixedly installed on both sides of the top front of the fire truck frame 1. An automatic docking mechanism 5 is provided at one end of the side duct mechanism 4 close to the main duct mechanism 2. A plurality of fans are provided in the side duct mechanism 4, which can be independently controlled by the control system to adjust the air volume. The side duct mechanism 4 and the automatic docking mechanism 5 are both existing technologies (reference publication number CN217015191U discloses an automatic docking structure for a smoke exhaust fire truck pipe). The automatic docking mechanism 5 is controlled by the control system to dock with the main duct mechanism 2, reducing smoke leakage along the connection between the main duct mechanism 2 and the side duct mechanism 4, and at the same time reducing the amount of air inhaled from the side by the main duct mechanism 2, thereby increasing the wind pressure and air volume of the device during negative pressure smoke exhaust, increasing the scope of application of the smoke exhaust device, and having stronger adaptability.

[0041] During negative pressure smoke exhaust: the smoke exhaust tail car mechanism 7 is transported to the designated position, and the smoke exhaust tail car mechanism 7 is connected to the side duct mechanism 4 with the air duct 6. The control system controls the automatic docking mechanism 5 to extend, docking the main duct mechanism 2 with the side duct mechanism 4. The control system controls the fans in the main duct mechanism 2 and the side duct mechanism 4 to perform negative pressure smoke exhaust. According to the concentration of the smoke, the number of fans turned on is controlled, thereby controlling the air volume.

[0042] Positive pressure air supply: When the air supply position is low, the smoke exhaust tail car mechanism 7 is transported to the designated position, and the smoke exhaust tail car mechanism 7 is connected to the side duct mechanism 4 with the air duct 6. The control system controls the fan in the side duct mechanism 4 to rotate in the opposite direction of negative pressure smoke exhaust for positive pressure air supply; when the air supply position is higher, the control system controls the fan in the main duct mechanism 2 to rotate in the opposite direction of negative pressure smoke exhaust for positive pressure air supply, and controls the lifting and rotating mechanism 3 through the control system to lift, pitch and rotate the main duct mechanism 2.

[0043] The smoke exhaust tail car mechanism 7 includes a smoke exhaust pipe assembly 71, and the smoke exhaust pipe assembly 71 includes a smoke exhaust pipe body 711. A central water pipe 713 is movably installed inside the smoke exhaust pipe body 711. A water guide ring 715 and a nozzle component 716 are provided on the circumference of the central water pipe 713. The central water pipe 713 is connected to the nozzle component 716 through the water guide ring 715.

[0044] A spiral blade 714 is provided on the outside of the central water pipe 713, and the spiral blade 714 is driven by the airflow in the smoke exhaust pipe body 711 to drive the central water pipe 713 and the nozzle component 716 to rotate; the central water pipe 713 can supply water to the nozzle component 716 and make the water spray out in a jet shape along the nozzle component 716. The jet sprayed by the nozzle component 716 can form a jet net around the central water pipe 713 and cover the entire area of ​​the exhaust port of the smoke exhaust pipe body 711. The jet net can flush debris carried in the airflow away from the airflow path.

[0045] Specifically, when the main air duct mechanism 2 and the side air duct mechanism 4 are controlled by the control system to perform negative pressure extraction along the air duct 6 and the smoke exhaust tail car mechanism 7, water is supplied to the central water pipe 713 through the vehicle-borne water or the external water source. The central water pipe 713 guides the water into the nozzle component 716 and sprays it out in a jet shape along the nozzle component 716. The jets sprayed by the multiple nozzle components 716 form a jet net covering the air inlet at the air inlet position of the smoke exhaust pipe main body 711, and the jet net is used to block the debris in the air flow, especially plastic bags, which are easy to cause damage to the fan. The smoke exhaust pipe 711 is equipped with a plurality of air intake ports 712 and 713, and the plurality of air intake ports 713 are equipped with a plurality of air intake ports 714. The plurality of air intake ports 715 are equipped with a plurality of air intake ports 716. The plurality of air intake ports 716 are equipped with a plurality of air intake ports 717. The plurality of air intake ports 718 are equipped with a plurality of air intake ports 719.

[0046] Compared with the prior art, the jets ejected from the several nozzle components 716 at the air inlet position of the smoke exhaust pipe main body 711 of the present invention can form a jet network covering the entire area of ​​the air inlet. Through the jet impact, the debris in the airflow during negative pressure smoke exhaust can be flushed away from the airflow path, avoiding the debris from entering the wind tube and causing an impact, and at the same time avoiding the debris from being adsorbed at the air inlet and affecting the air volume; in addition, the airflow can drive the central water pipe 713 and the nozzle component 716 to rotate, further improving the coverage effect of the jet network on the air inlet, and effectively flushing the debris away from the airflow path.

[0047] The smoke exhaust duct 71 is lifted and lowered by the lifting bracket 72, so that the smoke exhaust duct 71 is lifted and lowered, thereby reducing the suction of debris on the ground by the smoke exhaust duct 71. After the lifting bracket 72 lowers the smoke exhaust duct 71, the overall volume of the smoke exhaust duct 71 is reduced, which is convenient for transportation and storage. At the same time, the weight of the air duct 6 is usually large, and it is only dependent on manual labor to carry it at a high position, and the smoke exhaust effect is not ideal and the safety is also low. The air duct 6 is driven to be raised and lowered by the lifting bracket 72 to replace manual labor, and the smoke exhaust effect and safety are high, and the application occasions can be expanded.

[0048] In one embodiment provided by the present invention, a rotary joint 718 is detachably installed at one end of the central water pipe 713 away from the nozzle component 716, and a water supply pipe 719 is detachably installed on the rotary joint 718, and one end of the water supply pipe 719 extends to the outside of the smoke exhaust pipe body 711. Specifically, by providing the rotary joint 718, the central water pipe 713 can be ensured to rotate while stably supplying water to the nozzle component 716; an installation arm 712 is fixedly installed at one end of the smoke exhaust pipe body 711 close to the nozzle component 716, and the central water pipe 713 is movably mounted on the installation arm 712, and the stable restriction of the position of the central water pipe 713 is achieved by combining the installation arm 712 with the water supply pipe 719.

[0049] In another embodiment provided by the present invention, evenly distributed spiral blades 714 are provided on the outside of the central water pipe 713. The spiral blades 714 are driven by the airflow inside the smoke exhaust pipe body 711 to drive the water guide ring pipe 715 and the central water pipe 713 to rotate. Specifically, one end of the central water pipe 713 close to the nozzle component 716 is fixedly connected to the water guide ring pipe 715, and the nozzle component 716 is arranged on the water guide ring pipe 715; when negative pressure ventilation is performed, the airflow pushes the spiral blades 714 to drive the central water pipe 713, the water guide ring pipe 715 and the nozzle component 716 to rotate, so that the jet ejected by the nozzle component 716 can cover the entire area of ​​the air inlet of the smoke exhaust pipe body 711.

[0050] In another embodiment provided by the present invention, one end of the central water pipe 713 close to the nozzle component 716 is threadedly connected to the straightening rod, and the jet ejected by the nozzle component 716 is tangent to the straightening rod. It should be noted that if the axis of the nozzle component 716 is toward the central axis of the straightening rod, the jets ejected by several nozzle components 716 will collide with each other, and the effect of flushing light impurities such as plastic bags away from the airflow path by the jets cannot be achieved. Therefore, the jets ejected by the nozzle component 716 are deflected at a certain angle so that the jets are tangent to the circumference of the straightening rod, so that the jets ejected by several nozzle components 716 have independent injection areas, ensuring that the jets ejected by several nozzle components 716 can form a jet network, thereby flushing the debris carried in the airflow away from the airflow path.

[0051] In another embodiment provided by the present invention, the nozzle component 716 includes a mounting seat 7161, which is fixedly installed on the water guide ring pipe 715, and a water guide seat 7162 is hinged in the mounting seat 7161, and one end of the water guide seat 7162 is threadedly connected to the high-pressure nozzle 7163, and the other end is provided with a quick-plug connector 7166. Specifically, the water guide ring pipe 715 is provided with a mounting seat that cooperates with the mounting seat 7161, and a connecting head that cooperates with the quick-plug connector 7166. The connecting head is connected to the quick-plug connector 7166 through a hose to realize water supply from the water guide ring pipe 715 to the high-pressure nozzle 7163; the high-pressure nozzle 7163 is threadedly connected to the water guide seat 7162, and the water guide seat 7162 is hinged to the mounting seat 7161, and the high-pressure nozzle 7163 can be deflected with the hinge point between the water guide seat 7162 and the mounting seat 7161 as the axis.

[0052] In another embodiment provided by the present invention, the nozzle of the high-pressure nozzle 7163 is directed toward the inner side of the smoke exhaust pipe body 711, and the central axis of the high-pressure nozzle 7163 is set to deviate from the axis of the straightening rod. Specifically, the central axis of the high-pressure nozzle 7163 deviates from the axis of the straightening rod by 5-10°, ensuring that the jet ejected by the high-pressure nozzle 7163 under normal conditions can be ejected along the tangential position of the straightening rod, thereby flushing debris in the airflow away from the airflow path.

[0053] In another embodiment provided by the present invention, one side of the mounting seat 7161 is in an open state, and the other side is provided with a limiting portion that cooperates with the water guide seat 7162. A reset torsion spring 7164 is clamped at the bottom of the hinged position between the water guide seat 7162 and the mounting seat 7161. Specifically, a torque is applied to the water guide seat 7162 by the reset torsion spring 7164, and is restricted by the limiting portion, so that the high-pressure nozzle 7163 is in an axial deviation state when working normally, ensuring that the jet ejected by the high-pressure nozzle 7163 can be ejected tangentially along the straightening rod.

[0054] It can be seen from the above embodiments that when negative pressure ventilation is performed, the flue gas flow can carry the water mist generated by the jet into the air duct 6. The evaporation and heat absorption of the water mist can reduce the temperature of the flue gas, thereby avoiding high-temperature damage to the fan. However, in order to ensure that the jet ejected by the high-pressure nozzle 7163 can flush debris away from the air flow path, the jet is ejected along the tangential direction of the rectifier rod. At this time, the amount of water mist generated by the jet is small, so the amount of water mist that can be carried by the flue gas flow is small, and a good cooling effect on the flue gas cannot be achieved. Therefore, the following embodiments are proposed to solve the above problems.

[0055] In one embodiment provided by the present invention, a transmission gear 7165 is fixedly mounted on the top of the hinged position of the water guide seat 7162 and the mounting seat 7161, and a mounting ring 717 is fixedly mounted on one end of the smoke exhaust pipe body 711 close to the nozzle component 716, and a shifting tooth 7171 is provided on the inner side of the mounting ring 717. Specifically, when the nozzle component 716 is rotating, the transmission gears 7165 in the plurality of nozzle components 716 can engage with the mounting ring 717 one by one, thereby driving the water guide seat 7162 and the high-pressure nozzle 7163 to deflect, so that the axis of the high-pressure nozzle 7163 is directed toward the axis of the straightening rod. When the transmission gear 7165 disengages from the shifting tooth 7171, the water guide seat 7162 is restored to its original deviated state by the torsion of the reset torsion spring 7164.

[0056] In another embodiment provided by the present invention, during the rotation of the nozzle component 716, the transmission gear 7165 can engage with the shifting tooth 7171, thereby deflecting the water guide seat 7162, so that the central axis of the high-pressure nozzle 7163 is toward the central axis of the straightening rod. Specifically, the transmission gear 7165 can engage with the shifting tooth 7171, deflecting the water guide seat 7162, so that the axis of the high-pressure nozzle 7163 is toward the axis of the straightening rod, so that the jet ejected from the high-pressure nozzle 7163 can impact the straightening rod, thereby stirring up a large amount of water mist, increasing the amount of water mist that can be entrained by the flue gas airflow, and thereby improving the cooling effect on the flue gas.

[0057] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A large-flow multifunctional smoke exhaust device, comprising a main air duct mechanism (2), a side air duct mechanism (4), and an air duct (6) connected to the side air duct mechanism (4), characterized in that: It also includes a smoke exhaust tail car mechanism (7), which is fixedly connected to the end of the air duct (6); The smoke exhaust tail car mechanism (7) includes a smoke exhaust pipe assembly (71), and the smoke exhaust pipe assembly (71) includes a smoke exhaust pipe body (711), a central water pipe (713) is movably installed inside the smoke exhaust pipe body (711), a water guide ring (715) and a nozzle component (716) are provided on the circumference of the central water pipe (713), and the central water pipe (713) is communicated with the nozzle component (716) through the water guide ring (715); The central water pipe (713) is provided with a spiral blade (714) on the outside, and the spiral blade (714) is driven by the airflow in the smoke exhaust pipe body (711) to drive the central water pipe (713) and the nozzle component (716) to rotate; the central water pipe (713) can supply water to the nozzle component (716) and make the water spray out in a jet shape along the nozzle component (716); the jet sprayed by the nozzle component (716) can form a jet net around the central water pipe (713) and cover the entire area of ​​the exhaust port of the smoke exhaust pipe body (711); the jet net can flush debris carried in the airflow away from the airflow path.

2. A high-flow multifunctional smoke exhaust device according to claim 1, characterized in that: The smoke exhaust tail car mechanism (7) further comprises a lifting bracket assembly (72), which is fixedly mounted on the bottom of the smoke exhaust pipe assembly (71), and the lifting bracket assembly (72) can adjust the height of the smoke exhaust pipe assembly (71).

3. A high-flow multifunctional smoke exhaust device according to claim 1, characterized in that: A rotary joint (718) is detachably mounted on one end of the central water pipe (713) away from the nozzle component (716), and a water supply pipe (719) is detachably mounted on the rotary joint (718). One end of the water supply pipe (719) extends to the outside of the smoke exhaust pipe body (711).

4. A high-flow multifunctional smoke exhaust device according to claim 1, characterized in that: Uniformly distributed spiral blades (714) are provided on the outside of the central water guide pipe (713). The spiral blades (714) are driven by the airflow inside the smoke exhaust pipe body (711) to drive the water guide ring pipe (715) and the central water guide pipe (713) to rotate.

5. A high-flow multifunctional smoke exhaust device according to claim 1, characterized in that: One end of the central water pipe (713) close to the nozzle component (716) is threadedly connected to a straightening rod, and the jet ejected by the nozzle component (716) is tangent to the straightening rod.

6. A high-flow multifunctional smoke exhaust device according to claim 5, characterized in that: The nozzle component (716) comprises a mounting seat (7161) fixedly mounted on the water guide ring pipe (715); a water guide seat (7162) is hingedly connected to the mounting seat (7161); one end of the water guide seat (7162) is threadedly connected to a high-pressure nozzle (7163); and the other end is provided with a quick-connect connector (7166).

7. A high-flow multifunctional smoke exhaust device according to claim 6, characterized in that: The nozzle of the high-pressure nozzle (7163) faces the inner side of the smoke exhaust pipe body (711), and the central axis of the high-pressure nozzle (7163) is arranged to deviate from the axis of the rectifying rod.

8. The high-flow multifunctional smoke exhaust device according to claim 6, characterized in that: One side of the mounting seat (7161) is in an open state, and the other side is provided with a limiting portion that cooperates with the water guide seat (7162). A reset torsion spring (7164) is clamped at the bottom of the hinged position between the water guide seat (7162) and the mounting seat (7161).

9. The high-flow multifunctional smoke exhaust device according to claim 6, characterized in that: A transmission gear (7165) is fixedly mounted on the top of the hinged position between the water guide seat (7162) and the mounting seat (7161), and a mounting ring (717) is fixedly mounted on one end of the smoke exhaust pipe body (711) close to the nozzle component (716), and a shifting tooth (7171) is provided on the inner side of the mounting ring (717).

10. A high-flow multifunctional smoke exhaust device according to claim 9, characterized in that: During the rotation of the nozzle component (716), the transmission gear (7165) can engage with the shifting gear (7171), thereby shifting the water guide seat (7162) to deflect, so that the central axis of the high-pressure nozzle (7163) faces the central axis of the rectifying rod.

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