JPH0735598U - Underground station exhaust and air supply - Google Patents

Abstract

(57) [Summary] [Purpose] The construction cost, maintenance cost, and maintenance cost are reduced by reducing the total air volume and the number of devices, and since the total air volume can be concentrated in one section, the safety in case of fire increases, and it is always operated. Since the reliability is high in the event of a fire, the total air volume is adjusted by a variable speed blower, so there is little energy loss and air volume control is accurate, and the machine room and ventilation tower can be located in one place, so construction costs are high. The purpose of the present invention is to provide an underground station exhaust and air supply system that reduces the number of stations and increases the freedom of layout inside the station. [Composition] Exhaust and air supply devices connect ducts from various locations inside the station to the chamber through motor dampers.
The chamber is connected to a large variable speed blower and then to a ventilation tower. The opening of the motor damper and the rotation speed of the blower are controlled by a computer. Also,
The ventilator is located at the bottom of the station and connects the duct to the machine room at the tip of the platform to guide the exhaust or air supply from the tunnel to the machine room.

Description

Detailed description of the invention "Industrial field of application" The invention relates to a device for integrating the exhaust and air supply devices required in underground stations. "Prior Art" An exhaust device will be described with reference to FIG. Exhaust devices are installed in tunnels, concourses, homes, electric rooms, machine rooms, etc., and machine rooms and ventilation towers are installed on both sides of the station. Both the exhaust system and the ventilation tower are of a scale that matches the air volume required for smoke emission during a fire (about twice the ventilation). The tunnel section supplies air when a fire occurs and exhausts air from the adjacent station. "Problems to be solved by the device" -Since only one compartment is operated for smoke emission at the time of fire, it is too large for all devices to have the air volume required for smoke emission. . Therefore, the machine room area and the ventilation tower cross section are larger than necessary. -It is not reliable to operate a device that is rarely operated in case of fire.・ There is energy loss because a device with a large air volume is installed according to the design value and the damper is tightened to reduce the capacity and adjust the air volume.・ Since there are two ventilation towers, which are connected to the entrance and exit, the location cannot be decided freely due to site problems and the layout inside the station is inconvenient. [Means for Solving the Problems] In order to solve the above problems, it is preferable to use an exhaust device and an air supply device in which a plurality of ducts from each place are connected, and then to concentrate the exhaust and supply the air. Further, it is preferable that the machine room and the ventilation tower are provided in one place by a ventilation device that connects the machine room and the tunnel. "Operation" The exhaust system with multiple ducts exhausts exhaust air in a concentrated manner through a ventilation system that connects the ducts from each location to the machine room and the tunnel on the opposite side of the station, and in the event of a fire, smoke from only one compartment is exhausted. Perform using the total air volume. In addition, the air supply system with multiple ducts provides concentrated air supply through the ventilation system that connects the ducts from each location with the machine room and the tunnel on the opposite side of the station. Is performed using the total air volume. [Example] An exhaust device will be described with reference to FIG. The exhaust system connects the ducts from each location to a chamber through a motor damper, which chamber is connected to a large variable speed blower, eg, an inverter axial fan, and then to a ventilation tower. The air volume of the blower is set to be 150,000 m ³ / h, which is the total air volume required for exhaust at each place. If the air supply device has the same air volume and a reverse rotation function, it is possible to exhaust air inside the station. The opening of the motor volume damper and the rotation speed of the blower are controlled by a computer. The computer calculates the opening volume and rotation speed after calculating the air volume required for each location, and outputs the opening volume and rotation speed. Although only one exhaust device and one air supply device are used for blowing air, two or three blowing devices may be used if one device is too large in terms of space or if it is divided according to the quality of air. In addition, a ventilation device is constructed by burying a steel pipe for water supply or a fume pipe of approximately φ1500 mm, which is advantageous in terms of construction cost, earth pressure, water resistance, and air resistance, at the bottom of the station, and connects it to a duct at the tip of the platform to connect it to the machine room. This guides the exhaust from the tunnel (right) to the machine room. Since the air supply device is the same, there will be two ventilation devices at the bottom of the station. The ventilation device may be installed on the side of the station or in the duct inside the structure such as under the platform if space is available. "Effect of the device" The effect will be described with reference to Figs. The numbers given here are for comparison and are approximate values for general stations. In the exhaust system according to claim 1, the total air volume becomes 150,000 m ³ / h, which is half the conventional total air volume, and the machine room area and the ventilation tower cross-sectional view decrease. In addition, the number of equipment will be greatly reduced, and construction, maintenance and maintenance costs will be reduced. In addition, since the total amount of smoke exhausted during a fire can be concentrated in one section, the amount of smoke exhausted will be greater than before and the station's safety will be increased and the station will be operating at all times even if the total amount of air is small. Is also highly reliable. In terms of air volume adjustment, there is no energy loss and the air volume control is accurate because the total air volume is adjusted by the variable speed blower. Also in the air supply device of claim 2, the same effect as that of claim 1 can be obtained. In the ventilation device according to the third aspect, the machine room and the ventilation tower can be provided in one place, the construction cost is reduced, and the flexibility of the layout inside the station is increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a station of the present invention. Fig. 2 is a vertical sectional view of a conventional station. Numbers are general ventilation tower cross section, machine room cross section,
The approximate value of air volume is shown. The amount in parentheses is the volume of air when smoke is exhausted.

Claims (1)

[Claims for utility model registration] (1) In an underground station, exhaust air to multiple locations during normal operation,
In the event of a fire, an exhaust system that connects multiple ducts that exhaust smoke from only one section (2) Underground station, normally supply air to multiple locations,
In the event of a fire, an air supply device that connects a plurality of ducts that exhaust smoke from only one compartment (3) A ventilation device that connects a machine room used for exhaust or air supply and a tunnel