CN117515732A - Mechanical smoke exhaust system suitable for high-altitude supercharged building and control method thereof - Google Patents
Mechanical smoke exhaust system suitable for high-altitude supercharged building and control method thereof Download PDFInfo
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- CN117515732A CN117515732A CN202311384461.9A CN202311384461A CN117515732A CN 117515732 A CN117515732 A CN 117515732A CN 202311384461 A CN202311384461 A CN 202311384461A CN 117515732 A CN117515732 A CN 117515732A
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- 239000000779 smoke Substances 0.000 title claims abstract description 317
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000002265 prevention Effects 0.000 claims abstract description 59
- 238000007599 discharging Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 230000003139 buffering effect Effects 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 41
- 239000003517 fume Substances 0.000 claims description 29
- 238000000605 extraction Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F24F11/46—Improving electric energy efficiency or saving
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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 application provides a mechanical smoke discharging system and a control method thereof suitable for a high-altitude supercharged building, wherein the system comprises a pressure-bearing smoke discharging machine room, smoke prevention subareas, two mutually isolated pressure buffering smoke discharging air channels, a controller, a plurality of pressure sensors and smoke sensors, wherein each smoke prevention subarea is provided with a smoke discharging air pipe communicated with the corresponding smoke prevention subarea through a normally open smoke discharging air port, and an electric closed valve is further arranged on the smoke discharging air pipe; the pressure-bearing smoke exhaust machine room is provided with a special smoke exhaust fan, the input end of the special smoke exhaust fan is connected with a smoke exhaust air pipe through an electric closed valve, the output end of the special smoke exhaust fan is connected with a first pressure buffer smoke exhaust air flue, and a first smoke exhaust window is arranged on the side, close to the outer wall, of the first pressure buffer smoke exhaust air flue; the input end of the special smoke exhaust fan is also communicated with a second pressure buffering smoke exhaust air duct through a bypass smoke exhaust pipe with a power sealing valve, and the second pressure buffering smoke exhaust air duct is provided with a second smoke exhaust window. The application improves the smoke discharging efficiency of the supercharged building, and is energy-saving and environment-friendly.
Description
Technical Field
The application relates to the technical field of fire-fighting smoke exhaust of supercharged buildings, in particular to a mechanical smoke exhaust system suitable for high-altitude supercharged buildings and a control method thereof.
Background
At present, the mechanical smoke discharging mode is mostly used for the mechanical smoke discharging mode of civil buildings and industrial buildings, wherein the indoor and outdoor pressure difference of the buildings is zero, and the airtight application scene of the buildings is not considered. As the high-altitude pressurized building is always in a pressurized state, the indoor and outdoor pressure difference is maintained at 10-30 kPa, and the conventional mechanical smoke discharging mode can not meet the indoor and outdoor pressure difference of the high-altitude pressurized building and the use requirement of building air tightness.
Disclosure of Invention
The application provides a mechanical smoke exhaust system suitable for high-altitude supercharged buildings, which aims at solving the technical problem that the conventional mechanical smoke exhaust mode cannot meet the indoor and outdoor pressure difference of the high-altitude supercharged buildings and the use requirement of building air tightness.
The technical scheme adopted by the application is as follows:
the mechanical smoke exhaust system suitable for the high-altitude supercharged building comprises a pressure-bearing smoke exhaust machine room, at least one smoke prevention partition, two mutually isolated pressure buffer smoke exhaust air channels, a controller, a plurality of pressure sensors and smoke sensors, wherein each smoke prevention partition is provided with a smoke exhaust air pipe communicated with the corresponding smoke prevention partition through a normally open smoke exhaust air port, and an electric closed valve is further arranged on the smoke exhaust air pipe; the pressure-bearing smoke exhaust machine room is provided with a special smoke exhaust fan, the input end of the special smoke exhaust fan is connected with a smoke exhaust air pipe through an electric closed valve, the output end of the special smoke exhaust fan is connected with a first pressure buffer smoke exhaust air duct, and a first smoke exhaust window communicated with the exterior of the supercharged building is arranged on the side of the first pressure buffer smoke exhaust air duct close to the outer wall in an openable and closable manner; the input end of the special smoke exhaust fan is also communicated with a second pressure buffering smoke exhaust air duct through a bypass smoke exhaust pipe with a power-driven closed valve, and a second smoke exhaust window communicated with the exterior of the supercharged building is arranged on the second pressure buffering smoke exhaust air duct in an openable way close to the outer wall side; each pressure sensor is respectively arranged in each smoke prevention partition, the first pressure buffer smoke exhaust air duct and the second pressure buffer smoke exhaust air duct; each smoke sensor is respectively arranged in each smoke prevention zone; the controller is respectively connected with the special smoke exhaust fan, each electric sealing valve, the smoke exhaust window, the pressure sensor and the smoke sensor through circuits.
Furthermore, the input end of the special smoke exhaust fan is also provided with a smoke exhaust fireproof valve.
Further, a smoke discharging fireproof valve is arranged on the smoke discharging air pipe in each smoke preventing partition.
Further, the bypass smoke exhaust pipe is also provided with a one-way check valve.
Further, a one-way check valve is arranged on a pipeline between the output end of the special smoke exhaust fan and the second pressure buffer smoke exhaust air duct.
Further, smoke blocking vertical walls are arranged between the smoke prevention subareas.
Further, the first smoke exhaust window and the second smoke exhaust window are pressure-bearing windows, and are automatically opened within a set time after fire confirmation.
Further, the fire resistance limit of the smoke exhaust air pipe meets the relevant requirements of the building smoke prevention and exhaust system technical standard GB 51251-2017.
The other preferred embodiment of the application also provides a control method of the mechanical smoke discharging system suitable for the high-altitude supercharged building, which comprises the following steps:
determining a smoke prevention zone where a fire disaster occurrence area in the supercharged building is located according to signals detected by the smoke sensor;
when the pressure difference between the inside and the outside of the supercharged building is greater than a set threshold A, opening an electric closed valve on a smoke exhaust air pipe and a smoke exhaust bypass pipe in the smoke prevention subarea, and simultaneously opening a second smoke exhaust window, and discharging the smoke of the smoke prevention subarea to the outside from the second smoke exhaust window by utilizing the pressure difference between the inside and the outside of the supercharged building;
when the pressure difference between the inside and the outside of the supercharged building is lower than a set threshold B, further opening a special smoke exhaust fan and an electric sealing valve positioned at the input end of the special smoke exhaust fan, and simultaneously opening a first smoke exhaust window, and discharging the smoke of the smoke prevention partition to the outside from the first smoke exhaust window and a second smoke exhaust window by utilizing the combined action of the special smoke exhaust fan and the pressure difference between the inside and the outside of the supercharged building;
when the pressure difference between the inside and the outside of the supercharged building is further lower than a set threshold C, an electric sealing valve on the smoke exhaust bypass pipe is closed, and only the special smoke exhaust fan is used for exhausting smoke of the smoke prevention partition to the outside from the first smoke exhaust window.
Further, the pressure difference between the inside and the outside of the supercharged building is specifically the difference between the pressure values measured by the pressure sensors in the smoke-proof partition and the buffer smoke exhaust air duct.
Compared with the prior art, the application has the following beneficial effects:
the mechanical smoke discharging mode of the high-altitude supercharged building is adopted, the advantage of the self-contained internal pressure of the supercharged building can be fully utilized under the premise of not releasing pressure in advance, indoor and outdoor pressure difference is utilized, indoor smoke is rapidly discharged to the outside, fire-fighting smoke discharging is realized, the requirements of personnel evacuation and fire-fighting extinguishing are met, smoke discharging efficiency and energy conservation are improved, and the national fire-fighting design related specifications can be met. According to the method, as each smoke-proof partition shares the smoke-exhausting window through the smoke-exhausting air pipe, the number of the outer windows which can be opened by the outer vertical face can be reduced, the tightness of the plateau supercharging building is ensured, the number of gaps of the outer windows and the air leakage are reduced, the running energy consumption of the supercharging fan is reduced, and the method is energy-saving and environment-friendly.
In addition to the objects, features, and advantages described above, there are other objects, features, and advantages of the present application. The present application will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:
fig. 1 is a schematic diagram of a mechanical fume extraction system suitable for high altitude booster building in accordance with a preferred embodiment of the present application.
Fig. 2 is a flow chart of a control method of a mechanical fume exhaust system suitable for high altitude booster building according to a preferred embodiment of the present application.
Fig. 3 is a schematic representation of the control scheme of the mechanical fume extraction system suitable for high altitude booster buildings according to the preferred embodiment of the present application.
The figure shows: 1. pressurizing a building; 2. a pressure-bearing smoke exhaust machine room; 3. the first pressure buffer smoke exhaust duct; 41. a first smoke exhaust window; 42. a second smoke exhaust window; 5. a normally open smoke exhaust port; 6. a smoke exhaust air pipe; 7. a smoke-discharging fireproof valve; 81. a first electrically operated sealing valve; 82. a second electrically operated sealing valve; 83. a third electric sealing valve; 84. a fourth electric sealing valve; 85. a fifth electric sealing valve; 9. a one-way check valve; 10. a special smoke exhaust fan; 11. a bypass smoke exhaust pipe; 12. a smoke blocking vertical wall; 13. the second pressure buffer smoke exhaust duct; 14. a pressure sensor.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a preferred embodiment of the present application provides a mechanical smoke exhaust system suitable for a high altitude booster building, which comprises a pressure-bearing smoke exhaust machine room 2, a smoke prevention partition 1, a smoke prevention partition two, a smoke prevention partition three, two mutually isolated pressure buffer smoke exhaust air ducts 3, a controller, a plurality of pressure sensors and smoke sensors, wherein each smoke prevention partition is provided with a smoke exhaust air duct 6 communicated with the corresponding smoke prevention partition through a normally open smoke exhaust air opening 5, and a third electric sealing valve 83, a fourth electric sealing valve 84 and a fifth electric sealing valve 85 are respectively arranged on the smoke exhaust air duct 6 in the smoke prevention partition one, the smoke prevention partition two and the smoke prevention partition three; the pressure-bearing smoke exhaust machine room 2 is provided with a special smoke exhaust fan 10, the input end of the special smoke exhaust fan 10 is connected with a smoke exhaust air pipe 6 through a first electric closed valve 81, the output end of the special smoke exhaust fan is connected with a first pressure buffer smoke exhaust air duct 3, and a first smoke exhaust window 41 communicated with the outside of the supercharged building 1 is arranged on the side of the first pressure buffer smoke exhaust air duct 3 close to the outer wall in an openable and closable manner; the input end of the special smoke exhaust fan 10 is also communicated with a second pressure buffer smoke exhaust air duct 13 through a bypass smoke exhaust pipe 11 with a second electric closed valve 82, and a second smoke exhaust window 42 communicated with the outside of the supercharged building 1 is arranged on the second pressure buffer smoke exhaust air duct 13 close to the outer wall side in an openable and closable manner; each pressure sensor is respectively arranged in a first smoke prevention partition, a second smoke prevention partition, a third smoke prevention partition, a first pressure buffer smoke exhaust air duct 3 and a second pressure buffer smoke exhaust air duct 13; each smoke sensor is arranged in a first smoke prevention partition, a second smoke prevention partition and a third smoke prevention partition respectively; the controller is respectively connected with a special smoke exhaust fan 10, each electric closed valve (normally closed), a smoke exhaust window, a pressure sensor 14 and a smoke sensor circuit.
The mechanical smoke discharging mode of the high-altitude supercharged building is adopted, the advantage of the self-contained internal pressure of the supercharged building 1 can be fully utilized under the premise of not releasing pressure in advance in a pressurized and airtight environment, the smoke of the corresponding smoke prevention partition in the room is rapidly discharged to the outside by utilizing the pressure difference between the inside and the outside, the fire-fighting smoke discharging is realized, the requirements of personnel evacuation and fire-fighting and saving are met, the smoke discharging efficiency and energy conservation are improved, and the national fire-fighting design related specifications can be met. According to the method, as each smoke-proof partition shares the smoke-exhausting window through the smoke-exhausting air pipe, the number of the outer windows which can be opened by the outer vertical face can be reduced, the tightness of the plateau pressurizing building 1 is ensured, the number of gaps of the outer windows and the air leakage are reduced, the running energy consumption of the pressurizing fan is reduced, and the method is energy-saving and environment-friendly.
Preferably, the input end of the special smoke exhaust fan 10 is also provided with a smoke exhaust fireproof valve 7, and the smoke exhaust fireproof valve 7 is interlocked with the special smoke exhaust fan 10 to be closed, so as to prevent fire from spreading to other areas through the smoke exhaust pipeline.
Preferably, the smoke exhaust air pipes 6 in the smoke prevention subareas I, II and III are also provided with smoke exhaust fire-proof valves 7, so as to prevent fire from spreading to other areas through the smoke exhaust pipes.
Preferably, the bypass smoke exhaust pipe 11 is further provided with a one-way check valve 9, so as to prevent the outdoor exhaust smoke from flowing back to the suction inlet of the special smoke exhaust fan through the bypass smoke exhaust pipe 11 when the special smoke exhaust fan is used for exhausting smoke alone, thereby causing short circuit of air flow and being incapable of exhausting the smoke to the outside smoothly.
Preferably, a one-way check valve 9 is further disposed on a pipeline between the output end of the special smoke exhaust fan 10 and the second pressure buffer smoke exhaust duct 13, so as to prevent the outdoor exhaust smoke from flowing back to the suction inlet of the bypass smoke exhaust duct 11 through the special smoke exhaust fan when the bypass smoke exhaust duct 11 is independently exhausting smoke, thereby causing short circuit of air flow and failing to smoothly exhaust the smoke outdoors.
Preferably, a smoke-blocking vertical wall 12 is arranged between the smoke-proof subareas, so as to prevent the smoke in the fire area from spreading to other areas and affecting the evacuation of people.
Further, the first and second smoke discharging windows 41 and 42 are pressure-bearing windows, and are automatically opened within 15 seconds after the fire is confirmed.
Preferably, the fire resistance limit of the smoke exhaust air pipe 6 meets the requirements related to the specification of technical Standard for smoke and fume prevention systems of construction GB 51251-2017.
In addition, in the above embodiment, the main design parameters of the mechanical fume exhaust system further include:
(1) And (3) a main power supply: AC380/50Hz; and (3) controlling a power supply: DC24V + -10%, which are all fire-fighting power supplies;
(2) The distribution cable, the control cable and the special smoke exhaust fan 10 all meet the fire-fighting requirements;
(3) The special smoke exhaust fan 10 should meet the requirement of continuous operation for 30min at 280 ℃;
(4) Each smoke discharging window belongs to a pressure-bearing window, and is automatically opened within 15 seconds after fire disaster confirmation;
(5) The special smoke exhaust fan 10 and the smoke exhaust fireproof valve 7 of the suction inlet thereof are interlocked to run;
as shown in fig. 2, another preferred embodiment of the present application further provides a control method of the mechanical fume exhaust system suitable for high altitude booster building, including the steps of:
s1, determining smoke prevention subareas where fire disaster happening areas in the supercharged building 1 are located according to signals detected by a smoke sensor, wherein the smoke prevention subareas comprise a smoke prevention subarea I, a smoke prevention subarea II and a smoke prevention subarea III;
s2, when the pressure difference between the inside and the outside of the booster building 1 is larger than a set threshold A, the booster building 1 and the outdoor pressure difference are larger, the third electric sealing valve 83, the fourth electric sealing valve 84 or the fifth electric sealing valve 85 on the smoke exhaust air pipe 6 and the second electric sealing valve 82 on the smoke exhaust bypass pipe 11 are opened according to the smoke prevention subarea where the fire disaster occurs, and meanwhile, the second smoke exhaust window 42 is opened, and the smoke of the smoke prevention subarea is discharged to the outside (initial stage of the fire disaster) from the second smoke exhaust window 42 by utilizing the pressure difference between the inside and the outside of the booster building 1;
s3, when the pressure difference between the inside and the outside of the booster building 1 is lower than a set threshold B, when the indoor pressure is reduced to be insufficient to overcome the resistance of the smoke exhaust pipeline, further opening the special smoke exhaust fan 10 and the first electric sealing valve 81 positioned at the input end of the special smoke exhaust fan 10, simultaneously opening the first smoke exhaust window 41, and discharging the smoke of the smoke prevention zone to the outside (middle fire) from the first smoke exhaust window 41 and the second smoke exhaust window 42 by utilizing the combined action of the special smoke exhaust fan 10 and the pressure difference between the inside and the outside of the booster building 1;
and S4, gradually reducing the internal pressure in the booster building 1 along with the progress of smoke discharge, and when the pressure difference between the inside and the outside of the booster building 1 is further lower than a set threshold C, the indoor pressure is equivalent to the outdoor pressure, closing the second electric sealing valve 82 on the smoke discharge bypass pipe 11, and discharging the smoke of the smoke prevention zone to the outside (the later period of fire) from the first smoke discharge window 41 by using the special smoke discharge fan 10, wherein A > B > C.
Specifically, the pressure difference between the inside and the outside of the booster building 1 is specifically the difference between the pressure values measured by the pressure sensors 14 located in the smoke-proof partition and the buffer smoke exhaust duct.
Fig. 3 is a table of control modes of the mechanical fume exhaust system, in which "G" indicates that the station is off, "K" indicates that the station is on, and "-" indicates that the station is in the last state, as can be seen from fig. 3:
under normal working conditions without fire, the first electric sealing valve 81, the second electric sealing valve 82, the third electric sealing valve 83, the fourth electric sealing valve 84, the fifth electric sealing valve 85, the first smoke exhaust window 41, the second smoke exhaust window 42 and the special smoke exhaust fan 10 are all in a closed state, so that the pressure in the supercharged building 1 is ensured to meet corresponding requirements.
When a fire disaster working condition occurs, taking a smoke prevention partition I where a fire disaster occurs as an example, in a first stage of fire disaster occurrence, namely in an initial stage of fire disaster, the high-altitude pressurizing building 1 is in a pressure state, the indoor and outdoor pressure difference is maintained at 10-30 kPa, at the moment, the second electric sealing valve 82, the third electric sealing valve 83 and the second smoke exhaust window 42 are opened, the first electric sealing valve 81, the fourth electric sealing valve 84, the fifth electric sealing valve 85, the first smoke exhaust window 41 and the special smoke exhaust fan 10 are still kept in a closed state, at the moment, the smoke of the smoke prevention partition I is rapidly exhausted to the outside from the second smoke exhaust window 42 by utilizing the pressure difference between the inside and the outside of the pressurizing building 1, and the special smoke exhaust fan 10 is not required to be opened at the moment, so that the energy consumption can be saved while the smoke is rapidly exhausted.
In the second stage of fire, that is, in the middle stage of fire, as the smoke evacuation continues, the pressure of the high-altitude supercharged building continuously drops, but drops to the point that the pressure difference between the inside and the outside of the supercharged building 1 is lower than the set threshold value B, when the indoor pressure drops to the point that the resistance of the smoke evacuation pipeline is insufficient, on the basis of the front, the first electric sealing valve 81, the first smoke evacuation window 41 and the special smoke evacuation fan 10 are further opened, and the smoke evacuation in the smoke prevention partition is exhausted outdoors through the combined action of the special smoke evacuation fan 10 and the pressure difference between the inside and the outside of the supercharged building 1, so that the smoke evacuation is ensured to continue.
When the pressure difference between the inside and the outside of the booster building 1 is further lower than the set threshold value C, the indoor pressure is equivalent to the outdoor pressure, and the smoke cannot be discharged to the outside from the second smoke discharging window 42 by using the pressure difference between the inside and the outside of the booster building 1 at this time, so that the smoke can be discharged only by the special smoke discharging fan 10 in the third stage of the fire, that is, the second electric sealing valve 82 is closed on the basis of the second stage of the fire, and the smoke of the smoke prevention partition I is discharged to the outside from the first smoke discharging window 41 by using the special smoke discharging fan 10 only, thereby ensuring the continuous progress of the smoke discharge.
When the fire disaster area is located in the smoke-proof partition two and the smoke-proof partition three, the control method of the present application is similar to the above embodiment, and will not be described herein.
Therefore, the control method of the embodiment adopts a mechanical smoke discharging mode of the high-altitude supercharged building, can fully utilize the advantages of the self-contained internal pressure of the supercharged building 1 under the condition of pressurized and airtight environment without pressure relief in advance, and rapidly discharges indoor smoke to the outside by utilizing the indoor and outdoor pressure difference, so as to realize fire-fighting smoke discharging, thereby meeting the requirements of personnel evacuation and fire-fighting and saving, reducing the use energy consumption of a special smoke discharging fan, improving the smoke discharging efficiency and energy conservation, and meeting the related specifications of national fire-fighting design. In the embodiment, the smoke exhaust window is shared by each smoke prevention partition through the smoke exhaust air pipe, so that the number of the outer windows which can be opened by the outer vertical surface can be reduced, the tightness of the plateau pressurizing building 1 is ensured, the number of gaps of the outer windows and the air leakage are reduced, the running energy consumption of the pressurizing fan is reduced, and the energy conservation and the environment protection are realized.
The high-altitude supercharged building operation environment in the application is a pressurized and airtight environment, when a fire disaster occurs and is confirmed, all electric airtight valves, smoke exhaust fire prevention valves 7, special smoke exhaust fans 10 and air supplementing facilities of corresponding smoke prevention partitions can be opened in 15s in a linkage mode under the condition that pressure is not relieved in advance, and indoor smoke is timely discharged, so that the requirements of personnel evacuation and fire fighting and saving are met.
The foregoing description of the preferred embodiment of the present application is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. The mechanical smoke exhaust system suitable for the high-altitude supercharged building is characterized by comprising a pressure-bearing smoke exhaust machine room (2), at least one smoke prevention partition, two mutually isolated pressure buffer smoke exhaust air channels (3), a controller, a plurality of pressure sensors and smoke sensors, wherein each smoke prevention partition is provided with a smoke exhaust air pipe (6) communicated with the corresponding smoke prevention partition through a normally open smoke exhaust air port (5), and an electric closed valve is further arranged on the smoke exhaust air pipe (6); the pressure-bearing smoke exhaust machine room (2) is provided with a special smoke exhaust fan (10), the input end of the special smoke exhaust fan (10) is connected with a smoke exhaust air pipe (6) through an electric closed valve, the output end of the special smoke exhaust fan is connected with a first pressure buffer smoke exhaust air duct (3), and a first smoke exhaust window (41) communicated with the outside of the supercharged building (1) is arranged on the side of the first pressure buffer smoke exhaust air duct (3) close to the outer wall in an openable and closable manner; the input end of the special smoke exhaust fan (10) is also communicated with a second pressure buffering smoke exhaust air duct (13) through a bypass smoke exhaust pipe (11) with a power sealing valve, and a second smoke exhaust window (42) communicated with the outside of the supercharging building (1) is arranged on the second pressure buffering smoke exhaust air duct (13) close to the outer wall side in an openable and closable manner; each pressure sensor is respectively arranged in each smoke prevention partition, the first pressure buffer smoke exhaust air duct (3) and the second pressure buffer smoke exhaust air duct (13); each smoke sensor is respectively arranged in each smoke prevention zone; the controller is respectively connected with the special smoke exhaust fan (10), each electric sealing valve, the smoke exhaust window, the pressure sensor (14) and the smoke sensor circuit.
2. The mechanical fume extraction system suitable for high-altitude booster buildings according to claim 1, characterized in that the input end of the special fume extraction fan (10) is also provided with a fume extraction fire prevention valve (7).
3. The mechanical fume extraction system suitable for high-altitude supercharged buildings according to claim 1, wherein fume extraction fire-proof valves (7) are also arranged on the fume extraction air pipes (6) in each fume-proof subarea.
4. The mechanical fume extraction system suitable for high-altitude supercharged buildings according to claim 1, characterized in that the bypass fume extraction pipe (11) is also provided with a one-way check valve (9).
5. The mechanical fume exhaust system suitable for high altitude building according to claim 1, wherein a one-way check valve (9) is further arranged on the pipeline between the output end of the special fume exhaust fan (10) and the second pressure buffer fume exhaust duct (13).
6. The mechanical fume extraction system for high altitude pressurized buildings of claim 1, wherein fume blocking vertical walls (12) are disposed between the fume blocking partitions.
7. The mechanical fume extraction system for high altitude construction according to claim 1, wherein the first fume extraction window (41) and the second fume extraction window (42) are pressure-bearing windows, and are automatically opened within a set time after fire confirmation.
8. The mechanical fume extraction system suitable for high-altitude supercharged buildings according to claim 1, wherein the fire resistance limit of the fume extraction air pipe (6) meets the requirements related to building fume protection fume extraction system technical standard GB 51251-2017.
9. A control method of a mechanical fume extraction system suitable for high altitude construction according to any one of claims 1 to 8, comprising the steps of:
determining a smoke prevention zone where a fire disaster happening area in the booster building (1) is located according to signals detected by the smoke sensor;
when the pressure difference between the inside and the outside of the booster building (1) is larger than a set threshold A, opening an electric sealing valve on a smoke exhaust air pipe (6) and a smoke exhaust bypass pipe (11) in the smoke prevention subarea, and simultaneously opening a second smoke exhaust window (42), and exhausting the smoke of the smoke prevention subarea to the outside from the second smoke exhaust window (42) by utilizing the pressure difference between the inside and the outside of the booster building (1);
when the pressure difference between the inside and the outside of the booster building (1) is lower than a set threshold B, further opening a special smoke exhaust fan (10) and an electric sealing valve positioned at the input end of the special smoke exhaust fan (10), and simultaneously opening a first smoke exhaust window (41), wherein the smoke of the smoke prevention zone is exhausted to the outside from the first smoke exhaust window (41) and a second smoke exhaust window (42) by utilizing the combined action of the special smoke exhaust fan (10) and the pressure difference between the inside and the outside of the booster building (1);
when the pressure difference between the inside and the outside of the booster building (1) is further lower than a set threshold C, an electric sealing valve on the smoke exhaust bypass pipe (11) is closed, and smoke in the smoke prevention partition is exhausted to the outside from the first smoke exhaust window (41) only by using the special smoke exhaust fan (10).
10. The control method according to claim 9, characterized in that the pressure difference between the inside and the outside of the booster building (1) is in particular the difference between the pressure values measured by the pressure sensor (14) located in the smoke-proof partition and the buffer smoke-discharging duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311384461.9A CN117515732A (en) | 2023-10-24 | 2023-10-24 | Mechanical smoke exhaust system suitable for high-altitude supercharged building and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311384461.9A CN117515732A (en) | 2023-10-24 | 2023-10-24 | Mechanical smoke exhaust system suitable for high-altitude supercharged building and control method thereof |
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| Publication Number | Publication Date |
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| CN117515732A true CN117515732A (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311384461.9A Pending CN117515732A (en) | 2023-10-24 | 2023-10-24 | Mechanical smoke exhaust system suitable for high-altitude supercharged building and control method thereof |
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| CN (1) | CN117515732A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066634A (en) * | 2024-04-16 | 2024-05-24 | 福建省建筑设计研究院有限公司 | Indoor intelligent combined fire-fighting smoke-discharging system for pedestrian street |
-
2023
- 2023-10-24 CN CN202311384461.9A patent/CN117515732A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066634A (en) * | 2024-04-16 | 2024-05-24 | 福建省建筑设计研究院有限公司 | Indoor intelligent combined fire-fighting smoke-discharging system for pedestrian street |
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