CN211146842U - Tail end-adjustable front chamber pressurization air supply system - Google Patents
Tail end-adjustable front chamber pressurization air supply system Download PDFInfo
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- CN211146842U CN211146842U CN201922159546.2U CN201922159546U CN211146842U CN 211146842 U CN211146842 U CN 211146842U CN 201922159546 U CN201922159546 U CN 201922159546U CN 211146842 U CN211146842 U CN 211146842U
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Abstract
The utility model relates to a terminal adjustable antechamber pressurization air supply system, including setting up in the pressurization air supply well of building subject, its characterized in that: the pressurized air supply shaft vertically extends to each floor of the building main body, a main air pipe connected with the pressurized air supply machine is arranged in the pressurized air supply shaft, the main air pipe is respectively communicated with the front chambers of each floor through each layer of air supply branch pipe, and each layer of air supply branch pipe is provided with a normally closed electric multi-blade regulating valve. The utility model discloses can realize the independent regulation of every layer antechamber air supply, can guarantee it in the safety design within range to each antechamber particular case independent control room residual pressure value to the regulation is only gone on at the branch tuber pipe end, can not lead to the fact the influence to pressurization air supply system, thereby has effectively avoided the drawback of traditional pressure release regulative mode, has further guaranteed security, the reliability of antechamber pressurization air supply.
Description
Technical Field
The utility model relates to a building fire control field is a preceding room (or share preceding room) machinery pressurization air supply system with adjustable end, can realize the independent accurate control of each preceding room residual pressure value.
Background
The mechanical pressurization smoke prevention means is applied to the field of buildings more and more, but because the number of layers of a vertical pressurization air supply system is large, the pressurization air supply quantity is difficult to balance, and excessive residual pressure of a local floor area is easily caused.
In addition, whether the evacuation door of the front chamber is opened or not in the evacuation process can directly influence the residual pressure in the front chamber; according to the technical standard of building smoke prevention and exhaust system (GB 51251-2017), the air quantity calculation principle of the fire-fighting pressurization system of the upper and lower front rooms is as follows: simultaneously meeting the requirement of the sectional wind speed (more than or equal to 0.7 m/s) of the door opening of the adjacent 3 floors of front rooms on the ground when the evacuation door is in an open state; therefore, the situation that the residual pressure value exceeds the design value can occur as long as the opening number of the front chamber evacuation door is smaller than the value number in the design in the evacuation process.
Once the front chamber residual pressure value exceeds the limit, the fire door can not be opened, the evacuation of people is affected, and the fire accident is caused.
Therefore, according to the requirements of No. 3.4.4 in the technical Standard of building Smoke prevention and Smoke evacuation System (GB 51251-2017): the mechanical pressurizing air supply quantity is required to meet the condition that the pressure from the corridor to the front room to the staircase is distributed in an increasing mode, and the residual pressure value is required to meet the following regulation; 1. the pressure difference between the front chamber and the walkway is 25 Pa-30 Pa; 3. When the residual pressure value of the system exceeds the maximum allowable pressure value, pressure relief measures are taken. "
There are currently 2 treatment measures for overpressure:
firstly, a bypass pressure relief pipe is arranged on the pressurizing air feeder, and a pressure difference detector is linked with a bypass valve to control the opening and closing of the bypass pipe, so that the indoor overpressure of a pressurizing area is avoided.
And secondly, a pressure relief valve is arranged on the wall of the pressurization area, and the pressure relief valve is opened to relieve pressure by setting pressure relief starting pressure.
The measure is that the overpressure problem is solved by reducing the air output of a pressurizing fan, but the total air output of a pressurizing system is only reduced, and the air output of each pressurizing area cannot be independently adjusted aiming at the overpressure area; when the overpressure in a certain area causes the pressure of the system to be relieved, the phenomenon of insufficient pressure occurs in the area with proper residual pressure.
Step two, although the indoor residual pressure value can be independently controlled for each pressurizing area, the reduction of the pressurizing air supply quantity of the total system can be caused because a certain amount of air is leaked from the tail end, and the situation that the residual pressure is insufficient in the area with normal residual pressure can be caused; in addition, the device has a huge appearance, and is installed on a wall to influence the building appearance, so the device is less adopted.
Disclosure of Invention
The utility model discloses an aim at just in order to solve above problem, provide a terminal independently adjustable's pressurization air supply system to terminal regulation can not reduce the total amount of wind of pressurization air supply system, can realize the accurate control regulation of excess pressure value to each pressurization region actual conditions.
The utility model provides a technical scheme is:
a tail-end-adjustable antechamber pressurized air supply system comprises a pressurized air supply shaft arranged in a building main body, wherein the pressurized air supply shaft vertically extends to each floor of the building main body, a main air pipe connected with a pressurized air supply machine is arranged in the pressurized air supply shaft, the main air pipe is respectively communicated with antechambers of each floor through air supply branch pipes of each floor, and a normally-closed electric multi-blade adjusting valve is arranged on each air supply branch pipe.
The same-floor differential pressure detector and the same-floor normally-closed electric multi-blade regulating valve are respectively connected with the same-floor controller through signal lines.
The building main body is provided with a special machine room, and the pressurizing air feeder is arranged in the special machine room.
The normally closed electric multi-blade regulating valve, the controller and the pressure difference detector are all powered by a fire-fighting power supply; and is connected with a fire control center.
Fireproof partitions are arranged in the pressurizing air supply shaft, and 70 ℃ fireproof valves are arranged at the positions where the main air pipes penetrate through the fireproof partitions.
The differential pressure detector receives the pressure difference value between the front chamber and the walkway in the pressurizing and air supplying process, and transmits an excess pressure value signal to the controller, and the controller outputs an action signal and transmits the action signal to the normally closed electric multi-blade regulating valve according to the excess pressure value, so that the opening degree of the electric multi-blade regulating valve is regulated, the air supply quantity at the tail end of each front chamber is regulated independently, and the independent and accurate control of the excess pressure value of each front chamber is realized.
The system is adjusted only at the tail ends of the branch air pipes, so that the main air pipe system is not influenced, and the mutual influence among the branch air pipes is small; and the system does not take pressure relief measures, so that the total air supply quantity of the main pipe can be effectively ensured, and the reliability of the pressurization system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings.
As shown in fig. 1, the utility model comprises: the pressure air supply shaft 12 is arranged on the building main body 1, the pressure air supply shaft 12 vertically extends to each floor of the building main body, a main air pipe 4 connected with the pressure air supply machine 3 is arranged in the pressure air supply shaft 12, the main air pipe 4 is respectively communicated with a front chamber 13 of each floor through each layer of air supply branch pipe 6, a normally closed electric multi-blade adjusting valve 7 is arranged on each layer of air supply branch pipe 6, and the tail end of the normally closed electric multi-blade adjusting valve 7 is connected with a pressure air supply louver 8.
The building main body is provided with a special machine room 14, the pressurizing air feeder 3 is arranged in the special machine room 14, and the pressurizing air feeder 3 is connected with the main air pipe 4 through the air pipe reducing 2. The antechambers 13 of all the floors are respectively provided with a pressure difference detector 11 and a controller 10, and the same-floor pressure difference detector 11 and the same-floor normally-closed electric multi-blade regulating valve 7 are respectively connected with the same-floor controller 10 through signal lines. The pressure difference detector (sensor) 11 is arranged in the front chamber and is connected with the controller 11 through a signal wire 9, the controller 11 is connected with the normally closed electric multi-blade regulating valve 7 through a signal wire, and the normally closed electric multi-blade regulating valve 7, the controller 10 and the pressure difference detector 11 are all powered by a fire-fighting power supply. Fireproof partitions are arranged in the pressurizing air supply shaft 12, and 70 ℃ fireproof valves 5 are arranged at the positions where the main air pipes 4 penetrate through the fireproof partitions.
The normally closed electric multi-blade regulating valve, the controller and the pressure difference detector are all powered by a fire-fighting power supply.
The differential pressure detector 11 receives the pressure difference between the front chamber and the walkway in the pressurizing and air supplying process, and transmits a residual pressure value signal to the controller 10, the controller 10 outputs a signal to adjust the opening degree of the electric multi-blade adjusting valve 7, the air supply quantity at the tail end of each front chamber is independently adjusted, and the independent and accurate control of the residual pressure value of each front chamber is realized.
Claims (5)
1. The utility model provides a terminal adjustable antechamber pressurization air supply system, is including setting up in building subject's pressurization air supply well, its characterized in that: the pressurized air supply shaft vertically extends to each floor of the building main body, a main air pipe connected with the pressurized air supply machine is arranged in the pressurized air supply shaft, the main air pipe is respectively communicated with the front chambers of each floor through each layer of air supply branch pipe, and each layer of air supply branch pipe is provided with a normally closed electric multi-blade regulating valve.
2. The adjustable antechamber plenum system of claim 1, wherein: the same-floor differential pressure detector and the same-floor normally-closed electric multi-blade regulating valve are respectively connected with the same-floor controller through signal lines.
3. The adjustable antechamber plenum system of claim 2, wherein: the normally closed electric multi-blade regulating valve, the controller and the pressure difference detector are all powered by a fire-fighting power supply.
4. An adjustable-end antechamber forced air supply system according to claim 1, 2 or 3, wherein: the building main body is provided with a special machine room, and the pressurizing air feeder is arranged in the special machine room.
5. An adjustable-end antechamber forced air supply system according to claim 1, 2 or 3, wherein: fireproof partitions are arranged in the pressurizing air supply shaft, and 70 ℃ fireproof valves are arranged at the positions where the main air pipes penetrate through the fireproof partitions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922159546.2U CN211146842U (en) | 2019-12-05 | 2019-12-05 | Tail end-adjustable front chamber pressurization air supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922159546.2U CN211146842U (en) | 2019-12-05 | 2019-12-05 | Tail end-adjustable front chamber pressurization air supply system |
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| CN211146842U true CN211146842U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922159546.2U Active CN211146842U (en) | 2019-12-05 | 2019-12-05 | Tail end-adjustable front chamber pressurization air supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279054A (en) * | 2021-12-28 | 2022-04-05 | 云南省建筑工程设计院有限公司 | Front chamber pressurization air supply system for health building and control method thereof |
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2019
- 2019-12-05 CN CN201922159546.2U patent/CN211146842U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279054A (en) * | 2021-12-28 | 2022-04-05 | 云南省建筑工程设计院有限公司 | Front chamber pressurization air supply system for health building and control method thereof |
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