CN114719377B - Air inlet and exhaust system for researching influence of ventilation on fire disaster - Google Patents
Air inlet and exhaust system for researching influence of ventilation on fire disaster Download PDFInfo
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- CN114719377B CN114719377B CN202210230909.0A CN202210230909A CN114719377B CN 114719377 B CN114719377 B CN 114719377B CN 202210230909 A CN202210230909 A CN 202210230909A CN 114719377 B CN114719377 B CN 114719377B
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- air
- air inlet
- fan
- smoke exhaust
- pipe group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
- F24F11/34—Responding to malfunctions or emergencies to fire, excessive heat or smoke by opening air passages
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention relates to an air inlet and exhaust system for researching the influence of ventilation on fire, which belongs to the technical field of fire accidents, and the air inlet and exhaust system is arranged on a combustion chamber and comprises a first air pipe group, a second air pipe group, a smoke exhaust pipe group, a first air inlet fan, a second air inlet fan and a smoke exhaust fan, wherein an air pipe opening of the first air pipe group is arranged at the upper part of the outer side of the combustion chamber, and an air pipe opening of the second air pipe group is arranged at the lower part of the combustion chamber; the smoke outlet of the smoke exhaust pipe group is vertically arranged in the middle of the top end of the combustion chamber; the air inlet of the first air inlet fan is communicated with the first air pipe group, the air inlet of the second air inlet fan is communicated with the second air pipe group, and the air outlet of the smoke exhaust fan is communicated with the smoke exhaust pipe group; a first control valve is arranged between the first air inlet fan and the smoke exhaust fan, and a second control valve is arranged between the smoke exhaust fan and the second air inlet fan. The invention can realize the lower side air intake and the upper side air exhaust of the upper side air intake or the lower side air intake and the upper side air exhaust of different positions, and can be used for researching the influence of ventilation on indoor fire.
Description
Technical Field
The invention belongs to the technical field of fire accidents, and particularly relates to an air inlet and exhaust system for researching the influence of ventilation on fire.
Background
Fire accidents directly or indirectly affect safety-related buildings, systems and components. Under the fire accident, the high-temperature environment can destroy building facilities and even further cause explosion accidents; the heat radiation and the large amounts of toxic and harmful smoke generated in a fire will directly lead to casualties in the vicinity of the fire.
Indoor fire accidents are important concerns in industrial safety production processes, and in the case of mechanical ventilation, ventilation will affect the progress of combustion when a fire occurs indoors. The ventilation flow rate and vent position are important factors that affect smoke flow, visibility, temperature field distribution, flow field, and combustion efficiency and combustion release behavior of combustibles in a fire. In order to study the influence of ventilation on indoor fire, a special air intake and exhaust system is required to be designed.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an air inlet and exhaust system for researching the influence of ventilation on fire, which can flexibly change the air inlet and exhaust direction, ventilation flow rate and ventilation opening position and provides a platform for researching the influence of ventilation on indoor fire.
In order to achieve the above purpose, the invention adopts a technical scheme that:
an advance exhaust system for studying ventilation is to conflagration influence, arranges on the combustion chamber, advance exhaust system includes first wind nest of tubes, second wind nest of tubes, exhaust stack, first air inlet fan, second air inlet fan and exhaust fan, wherein:
the air pipe opening of the first air pipe group is arranged at the upper part of the outer side of the combustion chamber and is close to the top end, and the air pipe opening of the second air pipe group is arranged at the lower part of the combustion chamber and is close to the bottom end and is used for air intake or exhaust respectively; the smoke outlet of the smoke exhaust pipe group is vertically arranged in the middle of the top end of the combustion chamber;
the air inlet of the first air inlet fan is communicated with the first air pipe group, the air inlet of the second air inlet fan is communicated with the second air pipe group, and the air outlet of the smoke exhaust fan is communicated with the smoke exhaust pipe group;
the air outlet of the first air inlet fan, the air inlet of the smoke exhaust fan and the air inlet of the second air inlet fan are sequentially communicated through pipelines, a first control valve is arranged on a communication pipeline between the air outlet of the first air inlet fan and the air inlet of the smoke exhaust fan, and a second control valve is arranged on a communication pipeline between the air inlet of the smoke exhaust fan and the air inlet of the second air inlet fan;
the front ends of air inlets of the first air inlet fan, the second air inlet fan and the smoke exhaust fan are respectively provided with a valve.
Further, the air inlet and exhaust system for researching the influence of ventilation on fire disaster is described above, and the combustion chamber is of a sealed cuboid structure.
Further, the air intake and exhaust system for researching the influence of ventilation on fire disaster is described above, wherein the first air pipe group and the second air pipe group each comprise a plurality of air pipes, and the smoke exhaust pipe group comprises a plurality of smoke exhaust pipes.
Further, as described above, the air intake and exhaust system for studying the influence of ventilation on fire is provided with a valve for controlling the on-off of the pipeline separately for each air pipe of the first air pipe group and the second air pipe group and each smoke exhaust pipe of the smoke exhaust pipe group.
Still further, as described above, the air intake and exhaust system for studying the influence of ventilation on fire disaster, the first air duct group includes six air ducts, four air duct openings being provided on the upper side of the back surface of the combustion chamber, and the other two air duct openings being provided on the upper side of the side surface of the combustion chamber; the second air duct group comprises five air ducts, and air duct openings of the air ducts are arranged on the lower side of the front face of the combustion chamber.
Further, the air inlet and exhaust system for researching the influence of ventilation on fire disaster is described above, and the smoke exhaust fan adopts variable frequency control.
Further, the air inlet and exhaust system for researching the influence of ventilation on fire disaster is characterized in that the front end of the smoke exhaust fan is provided with a high-efficiency filter.
Further, as described above, the air intake and exhaust system for studying the influence of ventilation on fire disaster is characterized in that the smoke exhaust pipe is formed by welding stainless steel plates with the thickness of 1mm, the pipelines are connected by flanges, and rubber sealing strips are embedded.
Further, the air inlet and exhaust system for researching the influence of ventilation on fire disaster is described above, and the outside of the smoke exhaust pipe is wrapped with glass floss for protection.
Further, as described above for the air intake and exhaust system for studying the effect of ventilation on fire, all air pipes are made of DN250 stainless steel.
The air intake and exhaust system for researching the influence of ventilation on fire disaster has the following remarkable technical effects:
the invention can flexibly change the air inlet and outlet direction by controlling the on-off of the valves at different positions, realize the air outlet at the lower side of the upper side air inlet or the air outlet at the upper side of the lower side air inlet at different positions, flexibly change the ventilation flow rate and the ventilation opening position, and meet the requirements of experimental study.
Drawings
FIG. 1 is a top plan view of an air intake and exhaust system for studying the effect of ventilation on fire in accordance with an embodiment of the present invention;
FIG. 2 is a front view of the air intake and exhaust system of FIG. 1;
FIG. 3 is a side view of the air intake and exhaust system of FIG. 1;
FIG. 4 is a top view of a fan arrangement;
in the figure: 1-a combustion chamber; 2-a first air duct group; 3-a second air duct group; 4-a smoke exhaust pipe group; 5-a first air inlet machine; 6-a second air inlet machine; 7-a smoke exhaust fan; 8-a first control valve; 9-a second control valve.
Detailed Description
The invention will be further described with reference to specific examples and figures of the specification.
Fig. 1-3 respectively show a top view, a front view and a side view of an air intake and exhaust system for researching the influence of ventilation on fire disaster, which is provided by the embodiment of the invention, and is arranged on a combustion chamber 1, and comprises a first air pipe group 2, a second air pipe group 3, a smoke exhaust pipe group 4, a first air inlet fan 5, a second air inlet fan 6, a smoke exhaust fan 7 and a plurality of valves. The external fresh air enters the combustion chamber 1 from the air pipe opening of the first air pipe group 2 or the second air pipe group 3 under the action of the first air inlet fan 5 or the second air inlet fan 6, combustible substances are combusted in the combustion chamber 1, and smoke generated by combustion is discharged out of the combustion chamber 1 from the smoke outlet of the smoke exhaust pipe group 4 under the action of the smoke exhaust fan 7.
The first air pipe group 2 and the second air pipe group 3 respectively comprise a plurality of air pipes, the air pipe opening of the first air pipe group 2 is arranged at the upper part of the outer side of the combustion chamber 1 and is close to the top end, and the air pipe opening of the second air pipe group 3 is arranged at the lower part of the combustion chamber 1 and is close to the bottom end and is respectively used for air intake or exhaust; the smoke exhaust pipe group 4 comprises a plurality of smoke exhaust pipes, the smoke exhaust ports of the smoke exhaust pipes are vertically arranged in the middle of the top end of the combustion chamber 1, and smoke generated by combustion is exhausted out of the combustion chamber from the smoke exhaust ports.
Fig. 4 shows a top view of the fan arrangement, wherein a first air inlet fan 5, a second air inlet fan 6 and a smoke exhaust fan 7 are arranged at the lower part outside the combustion chamber 1, an air inlet of the first air inlet fan 5 is communicated with the first air pipe group 2, an air inlet of the second air inlet fan 6 is communicated with the second air pipe group 3, an air outlet of the smoke exhaust fan 7 is communicated with the smoke exhaust pipe group 4, and valves are arranged at front ends of air inlets of the three fans.
The air outlet of the first air inlet fan 5, the air inlet of the smoke exhaust fan 7 and the air inlet of the second air inlet fan 6 are sequentially communicated through pipelines, a first control valve 8 is arranged on a communication pipeline between the air outlet of the first air inlet fan 5 and the air inlet of the smoke exhaust fan 7, and a second control valve 9 is arranged on a communication pipeline between the air inlet of the smoke exhaust fan 7 and the air inlet of the second air inlet fan 6.
The front end of each air pipe and each smoke exhaust pipe is provided with a valve for independently controlling the on-off of the pipeline, thereby meeting the experimental requirements of different positions. In the embodiment, the front ends of each air pipe and each smoke exhaust pipe are electric air valves.
When the valves at the front ends of the first control valve 8 and the second air inlet fan 6 are closed, other valves are opened, and the first air inlet fan 5 and the smoke exhaust fan 7 are opened, air is introduced into the first air pipe group 2, air is exhausted from the second air pipe group 3, and therefore the function of air exhaust from the upper side and the lower side is achieved. At this time, all air pipe openings of the first air pipe group 2 are used for simultaneously carrying out air intake, all air pipe openings of the second air pipe group 3 are used for simultaneously carrying out air exhaust, required experimental pipe openings can be selected according to experimental requirements to keep ventilation, other pipe openings are closed, and air exhaust at the lower side of the upper side air intake at different positions can be realized.
When the valves of the second control valve 9 and the front end of the first air inlet fan 5 are closed, other valves are opened, and the second air inlet fan 6 and the smoke exhaust fan 7 are opened, air is taken in by the second air pipe group 3, and air is exhausted by the first air pipe group 2, so that the function of air exhaust from the upper side of lower side air intake is realized. At this time, all air pipe openings of the second air pipe group 3 are used for simultaneously air intake, all air pipe openings of the first air pipe group 2 are used for simultaneously air exhaust, required experimental pipe openings can be selected according to experimental requirements to keep ventilation, other pipe openings are closed, and air exhaust at the upper side of lower side air intake at different positions can be realized.
In this embodiment, the shape of the combustion chamber 1 is a cuboid, the first air duct set 2 includes six air ducts, wherein the nozzles of four air ducts (2 a, 2b, 2c, 2 d) are arranged on the upper side of the back of the combustion chamber 1, and the nozzles of the other two air ducts (2 e, 2 f) are arranged on the upper side of the side face of the combustion chamber 1; the second air duct group 3 comprises five air ducts (3 a, 3b, 3c, 3d, 3 e), and air duct openings of the air ducts are arranged on the lower side of the front surface of the combustion chamber 1; the smoke stack 4 comprises three smoke discharge tubes (4 a, 4b, 4 c) with their smoke discharge orifices vertically arranged in the middle of the top surface of the combustion chamber 1.
In this embodiment, the smoke exhaust fan 7 is a high-power fan, and adopts variable frequency control. The front end of the smoke exhaust fan 7 is provided with a high-efficiency filter which is connected by adopting a reducing way.
In this embodiment, all air pipes are made of DN250 stainless steel.
In the embodiment, the smoke exhaust pipeline is formed by welding stainless steel plates with the thickness of 1mm, the pipelines are connected by adopting flanges, rubber sealing strips are embedded in the pipelines, and the outside of the smoke exhaust pipe is wrapped with glass floss with the thickness of 50mm for protection, so that the smoke exhaust pipeline is suitable for a high-temperature environment and meets the requirements of GB50243-2016 inspection and acceptance Specification for the construction quality of ventilation and air-conditioning engineering.
According to the air inlet and exhaust system for researching the influence of ventilation on fire, the air inlet and exhaust directions can be flexibly changed by controlling the on-off of the valves at different positions, the air inlet and exhaust at the lower side of the upper side air inlet or the air exhaust at the upper side of the lower side air inlet at different positions can be realized, the ventilation flow rate and the ventilation opening position can be flexibly changed, and the requirements of experimental research can be met.
The above-described embodiments are merely illustrative of the present invention, which may be embodied in other specific forms or with other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims are intended to be encompassed within the scope of the invention.
Claims (8)
1. An advance exhaust system for studying ventilation to conflagration influence, arranges on combustion chamber (1), its characterized in that, advance exhaust system and include first wind nest of tubes (2), second wind nest of tubes (3), exhaust stack of tubes (4), first air inlet fan (5), second air inlet fan (6) and exhaust fan (7), wherein:
the air pipe opening of the first air pipe group (2) is arranged at the upper part of the outer side of the combustion chamber and is close to the top end, and the air pipe opening of the second air pipe group (3) is arranged at the lower part of the combustion chamber and is close to the bottom end and is used for air intake or exhaust respectively; the smoke outlet of the smoke exhaust pipe group (4) is vertically arranged in the middle of the top end of the combustion chamber;
an air inlet of the first air inlet fan (5) is communicated with the first air pipe group (2), an air inlet of the second air inlet fan (6) is communicated with the second air pipe group (3), and an air outlet of the smoke exhaust fan (7) is communicated with the smoke exhaust pipe group (4);
the air outlet of the first air inlet fan (5), the air inlet of the smoke exhaust fan (7) and the air inlet of the second air inlet fan (6) are sequentially communicated through pipelines, a first control valve (8) is arranged on a communication pipeline between the air outlet of the first air inlet fan (5) and the air inlet of the smoke exhaust fan (7), and a second control valve (9) is arranged on a communication pipeline between the air inlet of the smoke exhaust fan (7) and the air inlet of the second air inlet fan (6);
valves are arranged at the front ends of air inlets of the first air inlet fan (5), the second air inlet fan (6) and the smoke exhaust fan (7);
the first air pipe group (2) and the second air pipe group (3) comprise a plurality of air pipes, and the smoke exhaust pipe group (4) comprises a plurality of smoke exhaust pipes;
valves are arranged at the front ends of each air pipe of the first air pipe group (2) and the second air pipe group (3) and each smoke exhaust pipe of the smoke exhaust pipe group (4) and are used for independently controlling the on-off of a pipeline where the valves are arranged;
the on-off of valves at different positions is controlled to realize the lower side air intake and the lower side air exhaust or the upper side air intake and the upper side air exhaust.
2. An air intake and exhaust system for investigating the effect of ventilation on a fire as claimed in claim 1, characterized in that the combustion chamber (1) is of a sealed cuboid construction.
3. The air intake and exhaust system for studying the effect of ventilation on fire according to claim 1, wherein the first air duct group (2) comprises six air ducts, four of which are provided on the back upper side of the combustion chamber and the other two of which are provided on the side upper side of the combustion chamber; the second air duct group (3) comprises five air ducts, and air duct openings of the five air ducts are arranged on the lower side of the front face of the combustion chamber.
4. An air intake and exhaust system for studying the effect of ventilation on fire according to any one of claims 1-3, characterized in that the smoke exhaust fan (7) is controlled with variable frequency.
5. The air intake and exhaust system for studying the effect of ventilation on fire according to claim 4, wherein the front end of the smoke exhaust fan (7) is provided with a high efficiency filter.
6. The air intake and exhaust system for researching the influence of ventilation on fire according to claim 1, wherein the smoke exhaust pipe is formed by welding stainless steel plates with the thickness of 1mm, the pipelines are connected by adopting flanges, and rubber sealing strips are embedded.
7. The air intake and exhaust system for studying the effect of ventilation on fire according to claim 6, wherein the outside of the smoke exhaust pipe is wrapped with glass floss for protection.
8. An air intake and exhaust system for studying the influence of ventilation on fire according to claim 6 or 7, wherein all air pipes are made of DN250 stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210230909.0A CN114719377B (en) | 2022-03-09 | 2022-03-09 | Air inlet and exhaust system for researching influence of ventilation on fire disaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210230909.0A CN114719377B (en) | 2022-03-09 | 2022-03-09 | Air inlet and exhaust system for researching influence of ventilation on fire disaster |
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| Publication Number | Publication Date |
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| CN114719377A CN114719377A (en) | 2022-07-08 |
| CN114719377B true CN114719377B (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210230909.0A Active CN114719377B (en) | 2022-03-09 | 2022-03-09 | Air inlet and exhaust system for researching influence of ventilation on fire disaster |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971666A (en) * | 2017-05-13 | 2017-07-21 | 中国科学技术大学 | A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform |
| JP2020139366A (en) * | 2019-03-01 | 2020-09-03 | 株式会社竹中工務店 | Natural exhaust system |
| CN212339551U (en) * | 2020-05-18 | 2021-01-12 | 浙江工业大学工程设计集团有限公司 | Ventilation system for smoke exhaust system and exhaust system |
| CN112802389A (en) * | 2021-01-15 | 2021-05-14 | 武汉科技大学 | Multifunctional tunnel fire test platform with communication flue |
| CN113432223A (en) * | 2021-06-16 | 2021-09-24 | 上海恺申消防设备安装有限公司 | Fire-fighting smoke exhaust system |
-
2022
- 2022-03-09 CN CN202210230909.0A patent/CN114719377B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971666A (en) * | 2017-05-13 | 2017-07-21 | 中国科学技术大学 | A kind of multi-functional underground railway tunnel fire ventilation smoke exhaust pattern simulation research platform |
| JP2020139366A (en) * | 2019-03-01 | 2020-09-03 | 株式会社竹中工務店 | Natural exhaust system |
| CN212339551U (en) * | 2020-05-18 | 2021-01-12 | 浙江工业大学工程设计集团有限公司 | Ventilation system for smoke exhaust system and exhaust system |
| CN112802389A (en) * | 2021-01-15 | 2021-05-14 | 武汉科技大学 | Multifunctional tunnel fire test platform with communication flue |
| CN113432223A (en) * | 2021-06-16 | 2021-09-24 | 上海恺申消防设备安装有限公司 | Fire-fighting smoke exhaust system |
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| CN114719377A (en) | 2022-07-08 |
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