Composite smoke prevention and exhaust air pipe

Abstract

The utility model relates to the technical field of composite smoke prevention and exhaust air pipes, and discloses a composite smoke prevention and exhaust air pipe which comprises a main body mechanism and a composite mechanism, the composite mechanism is fixedly installed in the main body mechanism, the main body mechanism comprises an air pipe, a shell and a flange plate, the shell is fixedly installed on the outer surface of the air pipe, and the flange plate is fixedly installed on the shell. Flange plates are fixedly installed between the air pipes. The composite smoke prevention and exhaust air pipe has excellent fireproof performance, fire spreading is effectively obstructed, and the composite smoke prevention and exhaust air pipe adopts the fireproof plate layer, such as an inorganic fireproof plate, so that the composite smoke prevention and exhaust air pipe has excellent high-temperature resistance. When a fire disaster happens, the fireproof plates can bear invasion of high-temperature flames and are not prone to burning, a firm fireproof barrier is formed, and the fire behavior is effectively prevented from spreading to other areas through the air pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite smoke exhaust air pipe technical field, concretely to a composite smoke exhaust air pipe. BACKGROUND

[0002] The fire smoke exhaust system is widely used in office buildings, hotels, restaurants, theaters, shopping malls, hospitals, underground parking lots and other places that need smoke exhaust. At present, the air pipe for smoke exhaust is mostly made of steel plate or galvanized steel plate, and this kind of equipment is not protected by fire itself, so it does not have fireproof function. A large number of scientific research data and fire cases at home and abroad show that the air pipe and other equipment without fire protection have the risk of collapse, deformation and damage during the fire, and the damage of the equipment will lead to the spread of fire and smoke.

[0003] Because the internal structure of the building is complex, the smoke exhaust air pipe route is also complex, so the smoke exhaust air pipe is assembled in sections. At present, a connecting frame is directly used to fix the connection of two smoke exhaust air pipes, which has great assembly difficulty, and the fixing structure is not stable and reliable, and it is easy to loosen under great vibration, so that the gap of the connection increases, and leakage problem occurs during smoke exhaust.

[0004] The existing technology patent document with publication number CN 213178683 U provides a composite smoke exhaust air pipe, which comprises a smoke exhaust air pipe body, one end of the smoke exhaust air pipe body is provided with a smoke exhaust air pipe tail, the other end of the smoke exhaust air pipe body is provided with a smoke exhaust air pipe head, and the cross-sectional area of the smoke exhaust air pipe tail is the same as that of the smoke exhaust air pipe body.

[0005] However, the existing device cannot completely exhaust smoke in emergency situations such as fire. UTILITY MODEL CONTENTS

[0006] (I) Technical problem solved

[0007] The utility model aims to provide a composite smoke exhaust air pipe to solve the problem that the existing device cannot completely exhaust smoke in emergency situations such as fire.

[0008] (II) Technical scheme

[0009] To achieve the above purpose, the utility model provides the following technical scheme: a composite smoke exhaust air pipe, which comprises a main body mechanism and a composite mechanism, the main body mechanism is internally fixedly installed with the composite mechanism, the main body mechanism comprises an air pipe, an outer shell and a flange, the outer surface of the air pipe is fixedly installed with the outer shell, and the air pipes are fixedly installed with the flange.

[0010] The composite mechanism comprises fireproof plates, a fireproof valve and smoke outlets, a plurality of fireproof plates are fixedly installed around the inner wall of the air pipe, the fireproof valve is fixedly installed in the air pipe, and a plurality of smoke outlets are fixedly installed on the outer wall surface of the air pipe.

[0011] Preferably, the main body mechanism further comprises a boom and a cross arm, the cross arm is fixedly installed at the bottom end of the air pipe, and the booms are fixedly installed on the two sides of the cross arm.

[0012] Preferably, the composite mechanism further comprises blades and reinforcing ribs, the blades are fixedly installed on the surface of the fireproof valve, and the reinforcing ribs are fixedly installed on the surface of the shell.

[0013] Preferably, the composite mechanism further comprises a frame and a fan, a plurality of frames are fixedly installed on the surface of the air pipe, and the fan is fixedly installed in the center of the frame.

[0014] Preferably, the main body mechanism further comprises a bracket, and the bracket is fixedly installed between the cross arms.

[0015] Preferably, the main body mechanism further comprises bolts and sealing gaskets, a plurality of bolts are fixedly connected between the flanges, and the sealing gaskets are fixedly installed between the flanges.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. Excellent fire resistance, effectively blocking the spread of fire, composite smoke exhaust ducts use fireproof board layers, such as inorganic fireproof boards, which have excellent high-temperature resistance. In the event of a fire, these fireproof boards can withstand high-temperature flame attack without easily burning, forming a solid fireproof barrier that effectively prevents the spread of fire through the duct to other areas. For example, in high-rise buildings, once a fire occurs on a certain floor, composite smoke exhaust ducts can limit the spread of fire to the floor or local area, giving valuable time for personnel evacuation and fire rescue on other floors, reducing the loss and harm caused by the fire. Extend the fire resistance limit time, due to its structure and material properties, composite smoke exhaust ducts can significantly extend the fire resistance limit time compared to ordinary ducts. This means that in a fire environment, the duct can maintain its structural integrity and normal function for a longer period of time, providing more lasting protection for personnel evacuation and improving the safety and stability of the building in a fire. Reliable smoke exhaust function, efficient collection and exhaust of smoke, composite smoke exhaust duct systems can quickly collect a large amount of smoke generated at the fire scene through the reasonable arrangement of smoke exhaust ports and branch pipes, and efficiently transport it to the outdoor or special smoke exhaust facilities. Its good sealing and airflow organization ability ensures that smoke will not leak or accumulate in the pipe, making the smoke exhaust process smoother and more effective. In large commercial complexes, hotels, hospitals and other densely populated places, fast and effective smoke exhaust is crucial to the safety of personnel, and composite smoke exhaust ducts can play a key role in critical moments, reducing the harm of smoke to the respiratory tract of personnel and improving the chances of personnel escaping in a fire;

[0018] 2. Coordination with fire protection systems, the duct can seamlessly coordinate with other fire protection equipment and systems. For example, connected with the automatic fire alarm system, when the fire alarm signal triggers, the composite smoke exhaust duct can automatically start the smoke exhaust fan, and adjust the opening state and air volume of the smoke exhaust port according to the preset program, realize intelligent smoke exhaust control. At the same time, it can also cooperate with the air supply system to maintain the air pressure balance in the building, prevent the negative pressure caused by smoke exhaust from affecting the normal operation of fire rescue and personnel evacuation, and improve the cooperative combat capability and efficiency of the whole fire protection system. Good structural stability and durability, solid material and structure combination, the outer metal shell layer of the composite smoke exhaust duct provides strong mechanical strength and impact resistance, can withstand various external forces in the installation and use process, protect the internal fireproof and heat insulation materials from being damaged. The inner fireproof board layer cooperates with the metal shell layer to further enhance the overall structural stability of the duct. This solid material and structure combination makes the composite smoke exhaust duct not easy to deform and damage in long-term use, has high durability, can adapt to the use demand in different environmental conditions, reduces the maintenance and replacement frequency of the duct, and reduces the maintenance cost of the building. Adapt to complex environmental conditions, whether in high temperature, humidity, acid and alkali corrosion and other harsh environments, the composite smoke exhaust duct can maintain good performance. For example, in some industrial plants or chemical workshops, there may be corrosive gases or high temperature and humidity environments, the outer layer of galvanized steel sheet or stainless steel sheet can effectively resist corrosion, and the fireproof and heat insulation materials can work normally in high temperature environment, ensuring the long-term stable operation of the duct system, providing reliable guarantee for the ventilation and smoke exhaust of the building. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is a structure schematic diagram of the utility model;

[0021] Figure 3 It is a structure schematic diagram of the utility model;

[0022] Figure 4 It is a structure schematic diagram of the utility model.

[0023] In the drawing: 1, main body mechanism; 101, duct; 102, shell; 103, flange plate; 104, boom; 105, cross arm; 106, bracket; 107, bolt; 108, sealing gasket; 2, composite mechanism; 201, fireproof plate; 202, fire damper; 203, smoke exhaust port; 204, blade; 205, reinforcing rib; 206, frame; 207, fan. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0025] Please refer to Figure 1 Figure 4 The utility model provides a kind of technical solutions: a composite smoke exhaust air pipe, including main body mechanism 1 and composite mechanism 2, the composite mechanism 2 is fixedly installed in the inside of main body mechanism 1, the main body mechanism 1 includes air pipe 101, shell 102, flange plate 103, the outer surface of air pipe 101 is fixedly installed with shell 102, the flange plate 103 is fixedly installed between air pipe 101.

[0026] The composite mechanism 2 includes fireproof plate 201, fire damper 202, smoke outlet 203, the inner wall of air pipe 101 is fixedly installed with a plurality of fireproof plate 201, the fire damper 202 is fixedly installed in the inside of air pipe 101, the outer wall surface of air pipe 101 is fixedly installed with a plurality of smoke outlet 203.

[0027] Preferably, the main body mechanism 1 further includes boom 104 and cross arm 105, the cross arm 105 is fixedly installed at the bottom end of air pipe 101, and the boom 104 is fixedly installed on both sides of cross arm 105.

[0028] Preferably, the composite mechanism 2 further includes blade 204 and reinforcing rib 205, the surface of fire damper 202 is fixedly installed with blade 204, and the surface of shell 102 is fixedly installed with a plurality of reinforcing rib 205.

[0029] Preferably, the composite mechanism 2 further includes frame 206 and fan 207, the surface of air pipe 101 is fixedly installed with a plurality of frame 206, and the central portion of frame 206 is fixedly installed with fan 207.

[0030] Preferably, the main body mechanism 1 further includes bracket 106, and the bracket 106 is fixedly installed between cross arm 105.

[0031] Preferably, the main body mechanism 1 further includes bolt 107 and sealing gasket 108, a plurality of bolt 107 is fixedly connected between flange plate 103, and sealing gasket 108 is fixedly installed between flange plate 103.

[0032] ​Working principle: Fireproof plate 201 material layer, using inorganic fireproof plate 201, such as magnesium oxide board, etc. This plate has good fireproof performance, can withstand high temperature without burning, provides basic fireproof barrier for air duct 101 in fire environment. For example, magnesium oxide board is made of magnesium oxide, magnesium chloride, etc. as the main raw material, which can prevent the spread of fire when encountering flames. Metal shell 102 layer, mostly galvanized steel sheet or stainless steel sheet. Galvanized steel sheet has good strength and corrosion resistance, stainless steel sheet performs better in corrosion resistance and high temperature resistance. Metal shell 102 mainly plays the role of protecting the inner structure and supporting the overall shape of the air duct 101, such as bearing external pressure and collision during installation and use. Flange connection, the pipe sections of the air duct 101 are connected by flanges, which are made of metal materials such as steel flanges. The flanges have bolt 107 holes, and the adjacent air duct 101 pipe sections are tightly connected together using bolts 107 and nuts, ensuring the firmness and sealing of the connection. At the same time, sealing gaskets 108 are placed between the flanges to further prevent air and smoke leakage. The hanger 104 is made of round steel or profile steel, vertically suspended on the structural members of the building. The length of the hanger 104 is determined according to the installation height of the air duct 101 and the floor height of the building, and its diameter or cross-sectional size should meet the requirements of being able to bear the weight of the air duct 101 and possible additional loads. Cross arm 105, the cross arm 105 is installed at the lower end of the hanger 104, which is an angle steel or channel steel, directly in contact with the air duct 101, used to support the weight of the air duct 101. The length of the cross arm 105 is slightly larger than the outer diameter of the air duct 101, and the air duct 101 is fixed on the cross arm 105 through U-shaped bolts 107 or other fixing parts, ensuring that the air duct 101 remains stable in the horizontal direction. Reinforcing ribs 205, reinforcing ribs 205 are arranged on the surface of the metal shell 102 of the air duct 101. The reinforcing ribs 205 are metal strips fixed on the shell 102 by welding, distributed longitudinally or transversely, to increase the bending strength and stiffness of the air duct 101, preventing deformation of the air duct 101 under external force. Fire damper 202 valve body, the valve body of the fire damper 202 is installed at the key position of the air duct 101, such as through the fireproof wall and floor. The valve body is a metal structure with blades 204 and an actuator inside. The blades 204 are in an open state under normal circumstances, allowing air or smoke to pass through. When a fire occurs, the temperature reaches a set value such as 70℃ or 280℃, the actuator operates to close the blades 204, preventing the spread of fire and smoke through the air duct 101. Smoke outlet 203, the smoke outlet 203 body is arranged at a suitable position of the air duct 101 system for discharging smoke generated by fire. The smoke outlet 203 body includes a frame 206 and a fan 207. The frame 206 is fixed on the wall of the air duct 101, and the fan 207 can be opened and closed manually or electrically. Under normal circumstances, the smoke outlet 203 is closed to maintain the sealing of the air duct 101 system; when smoke needs to be discharged due to fire, the smoke outlet 203 is opened to allow smoke to be discharged smoothly.The bracket 106 supports the installed duct 101. The bracket 106 is made of metal and has a shape and size matching the duct 101, capable of holding the duct 101 and keeping it horizontal. Pressure difference driving, in the ventilation system, the equipment such as fan runs to produce pressure difference, so that air flows from high pressure to low pressure. The composite smoke control duct 101 serves as an air passage, forming a pressure difference at both ends, thereby promoting air flow in the pipe to achieve ventilation or smoke exhaust function. For example, in the mechanical smoke exhaust system, after the smoke exhaust fan is started, negative pressure is formed in the duct 101, and harmful gases such as smoke generated by fire are extracted from the indoor to the outdoor. Airflow organization, reasonable airflow organization can effectively improve the effect of ventilation and smoke exhaust. The composite smoke control duct 101 transports air to each area along the predetermined path through the arrangement of branch pipes, air outlets, etc., forming an orderly airflow. For example, in large shopping malls and other public places, by designing different air supply and return methods, air can be evenly distributed in the room to ensure ventilation effect and personnel comfort. Fireproof material barrier, the composite smoke control duct 101 often uses materials with good fireproof performance, such as magnesium board, rock wool, fireproof paint, etc. These materials are not easy to burn or have a certain fire resistance limit at high temperature, which can effectively block the spread of fire. When a fire occurs, the fireproof layer of the duct 101 can maintain structural integrity for a certain period of time, preventing the spread of fire and heat through the duct 101 to other areas, providing time for personnel evacuation and fire rescue. The role of fire damper 202, the fire damper 202 is installed at key positions of the duct 101 system, such as through firewalls, floor slabs, and entrances and exits of important equipment rooms, etc. Under normal circumstances, the fire damper 202 is in an open state to ensure air flow; when a fire occurs and the ambient temperature reaches the action temperature of the fire damper 202, such as 70°C or 280°C, the temperature sensing element of the fire damper 202 acts to automatically close the valve, cutting off the air duct to prevent the spread of fire and smoke through the duct 101. Smoke collection and transmission, at the fire scene, the composite smoke control duct 101 collects a large amount of smoke generated through the smoke exhaust port 203 arranged in each area, and transmits it to the outdoor or special smoke exhaust facility through the duct 101 system. The location, number and size of the smoke exhaust port 203 are designed according to the structural layout of the building and the requirements of fire compartmentation to ensure that smoke can be effectively exhausted in time. Work with smoke exhaust equipment, the composite smoke control duct 101 works with smoke exhaust fans, air supply fans and other equipment. The smoke exhaust fan provides power to extract smoke from the duct 101 and exhaust it to the outdoor; the air supply fan supplies fresh air to the indoor to maintain a certain air pressure balance, preventing excessive negative pressure caused by smoke exhaust from affecting personnel evacuation and fire rescue work.

[0033] Finally, it should be noted that the above is merely to illustrate the technical solutions of the present application, and is not a limitation on the scope of protection of the present application, and simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A composite smoke exhaust duct, comprising a main body mechanism (1) and a composite mechanism (2), the composite mechanism (2) being fixedly installed inside the main body mechanism (1), characterized in that: Said main mechanism (1) including wind pipe (101), shell (102), flange (103), the outer surface of wind pipe (101) is fixedly installed shell (102), and the fixed installation of flange (103) is between wind pipe (101); Said composite mechanism (2) including fireproof plate (201), fire damper (202), smoke outlet (203), the inner wall of wind pipe (101) is fixedly installed with several fireproof plates (201), and the inside fixed installation of wind pipe (101) has fire damper (202), and the outer wall surface of wind pipe (101) is fixedly installed with several smoke outlets (203).

2. A composite smoke control ducting according to claim 1, wherein: Said main mechanism (1) still includes boom (104) and cross arm (105), and the bottom of wind pipe (101) is fixedly installed with cross arm (105), and the both sides of cross arm (105) are fixedly installed with boom (104).

3. A composite smoke control ducting according to claim 2, wherein: Said composite mechanism (2) still includes blade (204) and reinforcing rib (205), and the surface of fire damper (202) is fixedly installed with blade (204), and the surface of shell (102) is fixedly installed with several reinforcing ribs (205).

4. A composite smoke control ducting according to claim 3, wherein: Said composite mechanism (2) still includes frame (206) and fan (207), and the surface of wind pipe (101) is fixedly installed with several frames (206), and the central fixed installation of frame (206) has fan (207).

5. A composite smoke control ducting according to claim 4, wherein: Said main mechanism (1) still includes bracket (106), and the fixed installation of bracket (106) is between cross arm (105).

6. A composite smoke control ducting air duct according to claim 5, wherein: Said main mechanism (1) still includes bolt (107) and sealing gasket (108), and the fixed connection of several bolts (107) is between flange (103), and the fixed installation of sealing gasket (108) is between flange (103).

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