CN102519120B - Open-closed system station subway platform ventilation and smoke exhaust method - Google Patents

Abstract

The present invention relates to rail transit ventilation and fire protection, in particular to a ventilation and smoke exhausting method for an open-close system station subway platform, characterized in that: the smoke exhausting method is as follows: a smoke exhaust pipe is connected outside the air supply pipe, The air supply pipe communicates with the air exhaust chamber through the smoke exhaust pipe, and a control valve is provided at the connection between the smoke exhaust pipe and the air exhaust chamber. When a fire occurs on the platform, the air supply pipe is closed. and the control valve between the air supply chamber, open the control valve between the smoke exhaust pipe and the air exhaust chamber, close the control valve of the centralized air return port on the side wall of the exhaust chamber, and use the The air outlet on the air supply pipe, the smoke exhaust pipe and the exhaust fan perform smoke exhaust. The station exhaust (smoke) machine is adopted to uniformly exhaust smoke through the platform air supply pipe, which meets the platform smoke exhaust requirements, and is suitable for the reconstruction of existing line stations and the situation where the floor height of the station is limited, and the exhaust (smoke) pipe on the track area cannot be installed. .

Description

A method for ventilating and exhausting smoke on subway platform of a station with open and closed system

technical field

The invention relates to rail transit ventilation and fire protection, in particular to a ventilation and smoke exhausting method for an open and closed system station subway platform.

Background technique

When the underground rail transit station adopts the open and closed system, the ventilation (air conditioning) system is responsible for the ventilation (air conditioning) and smoke exhaust of the station at the same time.

One way to deal with it is to select the corresponding exhaust (smoke) fan and exhaust the smoke through the exhaust (smoke) pipe on the top of the platform rail area. In this way, the cross-sectional area of the exhaust (smoke) pipe is very large, and the entire platform of the station needs to be exhausted. It is difficult to maintain the exhaust (smoke) pipe located on the top of the catenary in the rail area, and the aging of the air pipe after several years will bring safety hazards.

In subway stations that usually use a closed system or an open system to open and close, two air supply pipes are installed on both sides of the upper staircase of the platform waiting area, and a return air pipe is installed on the upper part of the platform rail area, forming a platform waiting in normal conditions. The airflow organization form of uniform air supply in the upper part of the track area and uniform exhaust air in the upper part of the track area. In case of fire, the platform exhaust fan evenly exhausts smoke through the upper air duct of the track area.

Contents of the invention

The object of the present invention is to provide a method for ventilating and exhausting smoke on the subway platform of an open and closed system station according to the above-mentioned deficiencies in the prior art. In the event of a fire, it plays the role of temporary smoke exhaust for a short time. the

The realization of the present invention is accomplished by the following technical solutions: a method for ventilating and exhausting smoke at a subway platform of an open and closed system station, comprising an air supply pipe, an air supply chamber, an air exhaust chamber and an exhaust fan system arranged along the length direction of the platform, The air supply pipe is located at the upper part of the waiting area of the platform, and the air exhaust chamber is located at both sides or in the middle of the station. There is a centralized air return port, and a control valve is provided at the connection between the centralized air return port and the air exhaust chamber, and it is characterized in that: the method of exhausting smoke is as follows: a smoke exhaust pipe is connected outside the air supply pipe, and the air supply pipe The air pipe communicates with the air exhaust chamber through the smoke exhaust pipe, and a control valve is provided at the connection between the smoke exhaust pipe and the air exhaust chamber. When a fire occurs on the platform, close the air supply pipe and the air exhaust chamber The control valve between the air supply chambers, open the control valve between the exhaust pipe and the air exhaust chamber, close the control valve of the centralized air return port on the side wall of the exhaust chamber, and use the air supply pipe The upper air outlet, the smoke exhaust pipe and the exhaust fan perform smoke exhaust. the

A centralized air return port is opened on at least one side of the air exhaust chamber.

The concentrated air return port is a louver-like return air port.

The control valve may be a damper.

The advantage of the present invention is: through the provided smoke exhaust pipe connected to the air supply pipe, the exhaust (smoke) fan can evenly discharge smoke to the station platform through the smoke exhaust pipe and the air supply pipe. The cost of renovating the platform is reasonable. When the station is built, due to the influence of pipelines and other conditions, the height of the platform floor cannot reach the normal height, and there is no space to install the upper exhaust pipe of the track area; or the upper exhaust pipe of the subway in operation is damaged. This method can be used when it is extremely difficult to repair the impact and the requirements of normal traffic, and it can meet the airflow organization of normal ventilation of the station and fire and smoke exhaust at the same time.

Description of drawings

Fig. 1 is the schematic diagram of pipeline connection after the transformation of the embodiment;

Fig. 2 is a sectional view along the direction I-I of Fig. 1 .

Detailed ways

The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figure 1-2, the marks in the figure are: track area 1, smoke exhaust pipe 2, air supply pipe 3, platform waiting area 4, air supply pipe 5, track area 6, smoke exhaust pipe 7, air valve 8 , air valve 9, concentrated air return port 10, concentrated air return port 11, air exhaust chamber 12, air valve 13, air valve 14, air supply chamber 15.

Embodiment: As shown in Figures 1 and 2, the track area 1 and the track area 6 are the track areas of the up and down subway trains respectively, and are respectively located on both sides of the platform waiting area 4, and the exhaust air chamber 12 is located on one side of the platform waiting area 4 . The top of 4 in the platform waiting area is provided with air supply pipe 3 and air supply pipe 5. The air supply pipe 3 and the air supply pipe 5 communicate with the air exhaust chamber 12 through the external smoke exhaust pipe 2 and the smoke exhaust pipe 7 respectively, and the joints of the smoke exhaust pipe 2, the smoke exhaust pipe 7 and the exhaust air chamber 12 are respectively provided with air vents. Valve 8 and Damper 9. The air exhaust chamber 12 is equipped with an exhaust (smoke) fan system, and the two sides of the air exhaust chamber 12 are also provided with a centralized air return port 10 and a centralized air return port 11 . Wherein the centralized air return port 10 and 11 are all provided with control valves, and the control valve can control the opening and closing state of the centralized air return port. A damper 13 and a damper 14 are also provided at the joints of the blower pipe 3 and the blower pipe 5 with the blower chamber.

When this embodiment is implemented in practice: firstly, carry out structural transformation on the existing air exhaust chamber 12 of the open-close system station, set up centralized air return outlets on the two sides of the air exhaust chamber 12 adjacent to the track area, and set up centralized air return outlets at the centralized air return outlets. A control valve is added, and the control valve can control the communication state between the centralized air return port and the air exhaust chamber 12 . The exhaust pipes 2 and 7 are externally connected to the air supply pipes 3 and 5, and the air supply pipes 3 and 5 communicate with the exhaust air chamber through the smoke exhaust pipes 2 and 7. Air valves 8 and 9 are respectively arranged at the joints, and the air valves can be controlled. The connection state between the exhaust pipe and the exhaust chamber.

When the subway is normally ventilated (or air-conditioned), the air valves 8, 9 at the joints of the exhaust pipes 2, 5 and the exhaust chamber 12 are closed, and the air valves 13, 14 on the air supply pipes of the platform are opened. At this time, the air supply pipes 3, 5 Only communicate with the air supply chamber 15, not communicate with the exhaust air chamber 12, the air supply pipes 3,5 carry out the ventilation operation of the platform waiting area 4. Simultaneously, open the control valve on the concentrated return air outlet 10,11, form the airflow organization form that the air ducts of the platform waiting area 4 upper parts are all evenly air-supplied, and the large return air outlet of the platform one end air exhaust chamber 12 concentrates the return air.

When there is a fire in the waiting area 4 of the station platform, when a large amount of smoke exhaust needs to be carried out, the air valves 8, 9 connected to the air supply pipes 3, 5 and the exhaust chamber are opened, so that the air supply pipes 3, 5 are communicated with the exhaust air chamber 12, and The air valves 13, 14 at the connection between the air supply pipes 3, 5 and the air supply chamber 15 are closed, so that the air supply pipes 3, 5 are not communicated with the air supply chamber 15, and at the same time, close the concentrators on both sides of the exhaust air chamber 12. The control valves of the air return ports 10, 11 make the centralized air return ports 10, 11 not communicate with the air exhaust chamber 12. The exhaust (smoke) fan system installed in the exhaust chamber 12 and the smoke exhaust pipes 2 and 7 connected to it realize the uniform smoke exhaust of the platform waiting area 4. At this time, the air supply pipes 3 and 5 are not connected with the air supply chamber 15. The ventilation operation only carries out the smoke exhaust operation in a short period of time together with the exhaust (smoke) fan system of the air exhaust chamber 12.

When building a station, affected by conditions such as pipelines, the height of the platform floor cannot reach the normal height, and there is no space to set the upper exhaust pipe of the track area; or the upper exhaust pipe of the subway in operation is damaged, which is affected by the catenary and normal traffic. Requirements, in the case of extremely difficult repairs, the implementation of the above embodiment increases the anti-danger smoke exhaust capacity of the original facilities without changing the original facilities, so that when a fire occurs in the platform area, it can be quickly exhausted. Rapidly formed the exhaust (smoke) fans of the station to uniformly exhaust smoke through the air supply pipe, which not only meets the conventional ventilation (air conditioning) requirements of the platform, but also meets the smoke exhaust requirements of the station. This method has little impact on the scale of the station, and avoids the difficulty in maintaining the exhaust (smoke) pipes in the upper part of the track area and the potential safety hazards brought about.

Claims (4)

1. an open and close type system station subway platform ventilates, smoke exhaust method, comprise the ajutage of arranging along the platform length direction, plenum chamber and air draft cell and exhaust fan system thereof, described ajutage be positioned at platform wait the district top, described air draft cell is positioned at both sides, station or middle part, described ajutage is communicated with plenum chamber, and the junction is provided with control valve, described air draft cell sidewall is provided with the centralized return air system mouth, the junction of described centralized return air system mouth and air draft cell is provided with control valve, it is characterized in that: described smoke exhaust method is: at the external smoke exhaust pipe of described ajutage, described ajutage is communicated with described air draft cell by described smoke exhaust pipe, the junction of described smoke exhaust pipe and described air draft cell is provided with control valve, when the platform breaking out of fire, close the control valve between described ajutage and the described plenum chamber, open the control valve between described smoke exhaust pipe and the described air draft cell, close the control valve of the centralized return air system mouth on the described air draft cell sidewall, utilize air outlet on the described ajutage, described smoke exhaust pipe and described exhaust fan are discharged fume.

A kind of open and close type system station subway platform according to claim 1 ventilate, smoke exhaust method, it is characterized in that: at least one side at the air draft cell has the centralized return air system mouth.

A kind of open and close type system station subway platform according to claim 1 ventilate, smoke exhaust method, it is characterized in that: described centralized return air system mouth is the return air inlet that is venetian blind type.

A kind of open and close type system station subway platform according to claim 1 ventilate, smoke exhaust method, it is characterized in that: described control valve is air-valve.

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