CN216342267U - Ventilation system is got rid of to flue gas for tunnel fire control - Google Patents

Abstract

The utility model discloses a smoke removing and ventilating system for tunnel fire protection; this system is including establishing at tunnel cave top and laying a plurality of efflux fan along the tunnel axis direction, and this system still includes: the device comprises an exhaust tower arranged at the tunnel portal, an exhaust pipeline connected with the exhaust tower and extending to the middle section in the tunnel portal, and a flue gas collection box arranged on the inner wall of the tunnel portal and connected with the exhaust pipeline, wherein the flue gas collection box is positioned between adjacent jet flow fans distributed along the axis direction of the tunnel; the exhaust tower comprises a fixed seat, a vertical cylinder arranged on the fixed seat and a first axial flow fan arranged in the vertical cylinder; the air inlet end and the air outlet end of the first axial flow fan in the vertical cylinder are provided with first silencers, and the top end of the vertical cylinder is provided with an exhaust blocking cap. The utility model takes full-jet ventilation as the main part and the gas-collecting tunnel mouth in the middle part of the tunnel as the auxiliary part, can effectively ventilate and fire-fighting the one-way traffic tunnel, has easy construction and low operation cost, and can better meet the economic and applicable principle of combined ventilation design.

Description

Ventilation system is got rid of to flue gas for tunnel fire control

Technical Field

The utility model belongs to the technical field of tunnel ventilation and fire fighting, and particularly relates to a smoke removing and ventilating system for tunnel fire fighting.

Background

Tunnel ventilation can be divided into natural ventilation and mechanical ventilation, wherein the mechanical ventilation has a plurality of ventilation modes, such as longitudinal ventilation, semi-transverse ventilation, full transverse ventilation and combined ventilation, and each ventilation mode can be divided into a plurality of ventilation modes; the specific selection of the ventilation mode needs to be determined according to the comprehensive consideration of design requirements.

When the longitudinal ventilation mode is adopted for the one-way traffic tunnel, the representative modes of the one-way traffic tunnel include a full jet mode, a hole centralized feeding type ventilation shaft discharge mode and a ventilation shaft discharge type, the ventilation modes can be combined and applied in practical application, the common mode of combining the full jet mode and the ventilation shaft discharge type is adopted, and the economic application principle is met when the combined ventilation mode is adopted.

The full jet type ventilation design is adopted, and the advantages of good utilization of traffic wind, low construction cost, low technical difficulty, low operation cost and the like are achieved in practical application; but also has the problems of inconvenient smoke discharge and environment-friendly cave mouths which are not beneficial to treatment when in fire disaster; the combination of full-jet ventilation and ventilation well discharge has the advantages of convenient smoke discharge and contribution to the environmental protection of the hole, but the ventilation well has certain construction difficulty and higher operation cost, so that the combination of the ventilation well and the ventilation well cannot better meet the economic and applicable principle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flue gas removal and ventilation system for tunnel fire protection, which mainly adopts full-jet ventilation, is assisted by the concentration of flue gas in the middle of a tunnel and the outward discharge of a tunnel opening, effectively ventilates and carries out fire protection treatment on a one-way traffic tunnel, and has the advantages of easy construction and low operation cost.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a ventilation system is got rid of to flue gas for tunnel fire control, is including establishing the top in the tunnel hole and laying a plurality of efflux fan along the tunnel axis direction, and this system still includes: the device comprises an exhaust tower arranged at the tunnel portal, an exhaust pipeline connected with the exhaust tower and extending into the middle section of the tunnel portal, and a flue gas collection box arranged on the inner wall of the tunnel portal and connected with the exhaust pipeline, wherein the flue gas collection box is positioned between adjacent jet flow fans arranged along the axis direction of the tunnel.

Further, the exhaust tower comprises a fixed seat, a vertical cylinder arranged on the fixed seat and a first axial flow fan arranged inside the vertical cylinder; the air inlet end and the air outlet end of the first axial flow fan in the vertical cylinder are provided with first silencers, and the top end of the vertical cylinder is provided with an exhaust blocking cap.

Furthermore, a bypass standby pipe is connected to the middle section of the exhaust pipeline in parallel, a second axial flow fan is arranged on the bypass standby pipe, and a second silencer is arranged at the air inlet end and the exhaust end of the second axial flow fan on the bypass standby pipe.

Further, an air pipe is arranged on the side of the air inlet end of the second axial flow fan on the lower side of the bypass standby pipe, and an electric valve is arranged at the end part of the air pipe.

Furthermore, the exhaust pipeline adopts a flexible wind tube or a steel tube with a rigid framework.

Further, the flue gas collection box comprises an arc-shaped pipe box and a wind shield, wherein the arc-shaped pipe box is matched with the inner radian of the tunnel hole, and the wind shield is arranged on the outer wall of the arc-shaped pipe box; the arc-shaped pipe box is a rectangular pipe, and the wind shields are arranged on the lower side of the arc-shaped pipe box and two wall surfaces adjacent to the lower side.

The utility model has the beneficial effects that:

1. on the basis of the existing full-jet ventilation design, the utility model designs an opening auxiliary exhaust structure, wherein the opening auxiliary exhaust structure utilizes an exhaust tower positioned at an opening and carries out smoke suction and opening outward discharge on the middle section of a tunnel through an exhaust pipeline; the structure design is beneficial to rapid smoke exhaust when a fire disaster occurs, and the problem of inconvenient smoke exhaust of the single full-jet ventilation design is solved; compared with the combined application design of the full jet type ventilation and ventilation well discharge type structure, the combined ventilation and ventilation well discharge type structure has the advantages of convenience in construction, low construction difficulty and low operation cost;

2. the bypass standby pipe is connected to the middle section of the exhaust pipeline in parallel, so that the exhaust tower has the use characteristic of one use and one standby, when a first axial flow fan in the exhaust tower breaks down, a second axial flow fan on the bypass standby pipe can be used for discharging tunnel smoke, and the exhaust tower is safer and more reliable in use;

3. according to the utility model, the bypass standby pipe is also provided with the air pipe and the electric valve, and when the electric valve is opened, the air pipe has the characteristic of assisting in sucking the smoke in the area, so that the exhaust performance of the tunnel is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the exhaust duct in a top view in a tunnel according to the present invention;

fig. 3 is a schematic structural view of the flue gas collection box of the present invention.

Wherein, 1-jet flow fan; 2-an exhaust column; 3-an exhaust duct; 4-a flue gas collection box; 5-fixing the base; 6-vertical cylinder; 7-a first axial fan; 8-a first muffler; 9-exhaust blocking cap; 10-bypass spare pipe; 11-a second axial fan; 12-a second muffler; 13-air pipe; 14-an electrically operated valve; 15-arc pipe box; 16-wind deflector.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, a tunnel fire protection flue gas removal ventilation system comprises a plurality of jet flow fans 1 arranged at the top in a tunnel hole and distributed along the axis direction of the tunnel, an exhaust tower 2, an exhaust pipeline 3 and a flue gas collection box 4; wherein, the exhaust tower 2 is arranged at the tunnel portal; the exhaust pipeline 3 is connected with the exhaust tower 2, the exhaust pipeline 3 extends to the middle section position in the tunnel, specifically to the position of half of the total length of the tunnel, and the distance deviation can be controlled within the range of +/-50 m; the flue gas collection box 4 is arranged on the inner wall of the tunnel and connected with the exhaust pipeline 3, and the gas collection box 4 is positioned between the adjacent jet fans 1 distributed along the axis direction of the tunnel.

Specifically, the exhaust tower 2 is used for being matched with an exhaust pipeline 3 to suck smoke in the middle section of the tunnel; the exhaust tower 2 comprises a fixed seat 5, a vertical cylinder 6 and a first axial flow fan 7; the fixed seat 5 is of a bracket structure and is provided with a supporting platform; the bottom end of the vertical cylinder 6 in a square cylinder shape is fixed on a supporting platform of the fixed seat 5; the first axial flow fan 7 is fixed inside the vertical cylinder 6; in order to realize the purposes of noise reduction and noise reduction, a first silencer 8 can be arranged outside the air inlet end and the air outlet end of the first axial flow fan 7 in the vertical cylinder 6; in order to realize the aims of rain prevention and bird prevention, the top end of the vertical cylinder 6 is provided with an exhaust blocking cap 9, and the side wall of the exhaust blocking cap 9 is provided with grid exhaust holes. The best design position for the exhaust tower 2 is at the exit side of the tunnel, but it can also be at the entrance side of the tunnel.

Specifically, exhaust duct 3 can adopt flexible dryer or the steel pipe of taking the rigidity skeleton, and exhaust duct 3 sets up top and skew efflux fan in the tunnel hole through the mode of hanging, and pre-buried steel seat on the tunnel inside lining is fixed exhaust duct 3 when concrete usable efflux fan is installed, welds the steel couple on the steel seat and utilizes U type bolt to fix exhaust duct 3.

A bypass standby pipe 10 is connected to the middle section of the exhaust pipeline 3 in parallel, and the bypass standby pipe 10 is used when the exhaust tower 2 fails, so that the use safety and reliability are improved; a second axial fan 11 is arranged on the body of the bypass standby pipe 10, the second axial fan 11 corresponds to the position of the jet fan 1, and the second axial fan is fixed by using an embedded steel seat of the jet fan 1 and is convenient for connecting a power circuit; based on the requirements of noise reduction and noise reduction, a second silencer 12 is arranged at the air inlet end and the air outlet end of a second axial flow fan 11 on the body of the bypass standby pipe 10. In order to improve the ventilation and smoke exhaust performance of the tunnel, an air pipe 13 is arranged on the air inlet end side of the second axial flow fan 11 on the lower side of the bypass standby pipe 10, an electric valve 14 is arranged at the end part of the air pipe 13, and when the electric valve 14 is opened, the first axial flow fan 7 and the second axial flow fan 11 can perform smoke suction on the area corresponding to the air pipe 13.

Specifically, the flue gas collection box 4 is used for collecting flue gas; the flue gas collection box 4 comprises an arc-shaped pipe box 15 and a wind shield 16; the arc-shaped pipe box 15 is of a rectangular tubular structure, and the arc-shaped pipe box 15 is fixed in the tunnel hole in a hanging mode or fixed in a mode of being attached to the inner wall of the tunnel hole; the wind shields 16 are arranged on the lower side of the arc-shaped pipe box and two wall surfaces adjacent to the lower side, so that the smoke collecting box 4 can collect smoke on the lower side and two sides in a centralized manner.

The working process and principle of the utility model are as follows:

in the practical application process, the executing part of the ventilation system is controlled by the tunnel controller according to the carbon monoxide concentration, the traffic flow information, the temperature in the tunnel and other factors detected in the tunnel; when ventilation and air change are needed: the tunnel controller controls the jet fan 1 and the first axial flow fan 7 to start, at the moment, air at two ends of a tunnel entrance enters the tunnel and is collected by the smoke collecting box 4 in the middle of the tunnel, the arc-shaped pipe box 15 structure of the smoke collecting box 4 can enlarge the action range of smoke suction, air in the tunnel is discharged out of the tunnel through the smoke collecting box 4, the exhaust pipeline 3 and the exhaust tower 2, and the operation mode is also favorable for quickly and effectively discharging the fire smoke of the tunnel; when a fire disaster occurs in the tunnel, a large number of vehicles are retained and/or the temperature in the tunnel is high, the second axial flow fan 11 can be additionally started to strengthen the air suction capacity of the exhaust pipeline 3, promote the quick discharge of harmful gas in the tunnel and realize the quick replacement of gas in the tunnel; if the first axial fan 7 breaks down, the second axial fan 11 can be controlled to be started, and the requirement of air exhaust in the hole is maintained; when the vehicle flow in the tunnel is less, only the jet fan 1 can be controlled to start, and also only the first axial fan 7 or the second axial fan 11 can be controlled to start, so that the energy consumption is favorably reduced. The utility model adopts a combined ventilation mode to realize the ventilation design of the tunnel, and the full jet ventilation design is matched with the exhaust pipeline 3 arranged in the tunnel and the exhaust tower 2 arranged outside the tunnel to realize the effective ventilation of the tunnel, so that the construction difficulty can be reduced because the tunnel structure does not need to be greatly changed during construction, and the construction is simple and convenient.

Claims (6)

1. The utility model provides a ventilation system is got rid of to flue gas for tunnel fire control, includes establishes top in the tunnel hole and lays a plurality of efflux fan (1) along the tunnel axis direction, its characterized in that still includes: the tunnel smoke collection device comprises an exhaust tower (2) arranged at the position of a tunnel opening, an exhaust pipeline (3) connected with the exhaust tower (2) and extending into the middle section of the tunnel opening, and a smoke collection box (4) arranged on the inner wall of the tunnel opening and connected with the exhaust pipeline (3), wherein the smoke collection box (4) is positioned between adjacent jet fans (1) distributed along the axis direction of the tunnel.

2. The tunnel fire protection flue gas removal ventilation system according to claim 1, wherein the exhaust tower (2) comprises a fixed base (5), a vertical cylinder (6) arranged on the fixed base (5), and a first axial flow fan (7) arranged inside the vertical cylinder (6); the air inlet end and the air outlet end of a first axial flow fan (7) in the vertical cylinder (6) are provided with first silencers (8), and the top end of the vertical cylinder (6) is provided with an exhaust blocking cap (9).

3. The tunnel fire-fighting flue gas removal ventilation system according to claim 1 or 2, characterized in that a bypass standby pipe (10) is connected to the middle section of the exhaust duct (3) in parallel, a second axial fan (11) is arranged on the bypass standby pipe (10), and second silencers (12) are arranged at the air inlet end and the air outlet end of the second axial fan (11) on the bypass standby pipe (10).

4. The tunnel fire-fighting flue gas removal ventilation system as claimed in claim 3, wherein an air pipe (13) is arranged at the side of the air inlet end of the second axial flow fan (11) below the bypass standby pipe (10), and an electric valve (14) is arranged at the end part of the air pipe (13).

5. The tunnel fire-fighting flue gas removal ventilation system as claimed in claim 3, wherein the exhaust duct (3) is a flexible wind tube with a rigid skeleton or a steel tube.

6. The smoke removing and ventilating system for tunnel fire protection as claimed in claim 1, wherein said smoke collecting box (4) comprises an arc-shaped pipe box (15) adapted to the inner arc of the tunnel, a wind shield (16) arranged on the outer wall of the arc-shaped pipe box (15); the arc-shaped pipe box (15) is a rectangular pipe, and the wind shields (16) are arranged on the lower side of the arc-shaped pipe box and two wall surfaces adjacent to the lower side.

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