Ventilation escape system for long-distance tunnel-type integrated pipeline corridor

Abstract

The present invention discloses a ventilation escape system for a long-distance tunnel-type integrated pipe gallery, the length of which is more than 400 meters, and only two ends are provided with ground exits; a gas pipeline and a corresponding gas compartment are laid in the integrated pipe gallery, and the gas compartment is divided into a number of gas compartment fire partitions by flame-retardant and fire-resistant materials; a normally closed fire door is provided between each two adjacent gas compartment fire partitions; the ventilation escape system includes an exhaust chamber and an air intake and escape passage; the exhaust chamber is arranged above a number of gas compartment fire partitions, and is connected to each gas compartment fire partition through a normally open air valve; the air intake and escape passage is arranged on one side of the gas compartment fire partition, and is provided with a normally open air valve and a normally closed fire door between each gas compartment fire partition. The application of the present invention avoids the setting of the ground node of the pipe gallery, thereby reducing the construction difficulty, reducing the impact on the surrounding plots, saving the cost, and greatly reducing the construction cost.

Description

Technical Field

[0001] The invention relates to the technical field of comprehensive pipe gallery construction, and in particular to a ventilation escape system for a long-distance tunnel-type comprehensive pipe gallery. Background Art

[0002] The integrated pipeline corridor is equipped with special nodes to ensure its normal operation. The nodes that need to be connected to the ground generally include ventilation holes, escape holes, lifting holes, substations, monitoring centers, etc.

[0003] According to the relevant requirements for node design in the "Technical Specifications for Urban Integrated Pipeline Gallery Engineering" (GB50838-2015), the distance between escape hatches in cabins where power cables (power cabins or integrated cabins) or natural gas pipelines (gas cabins) are laid should not be greater than 200 meters, and the distance between escape hatches in other cabins (such as sewage cabins where sewage pipes are laid) should not be greater than 400 meters. Therefore, in practical applications, the maximum distance between ventilation and escape combination nodes of each cabin of the integrated pipeline gallery above the ground is generally no more than 200 meters. Such setting requirements are easy to achieve for integrated pipeline galleries under urban municipal roads with layout conditions.

[0004] With the expansion of urban development and the gradual saturation of underground development space, long-distance (>400 meters) tunnel-type (through mountains, across rivers, or functional plots) integrated pipelines have begun to appear. Multiple exits leading to the ground are set in the tunnel section of this type of pipeline corridor, which is not only extremely difficult to construct, but also has an impact on the surrounding environment and the construction cost itself is very high.

[0005] Therefore, how to achieve the ventilation and escape requirements of each compartment in a long-distance tunnel-type integrated pipeline corridor has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, the present invention provides a ventilation and escape system for a long-distance tunnel-type integrated pipeline corridor, the purpose of which is to meet the ventilation and escape needs of cabins (such as gas cabins) with separate ventilation requirements in each fire protection zone by adding independent exhaust chambers and air inlet escape passages; in addition, for other types of cabins (such as integrated cabins, sewage cabins, etc.), escape ports and air valves leading to other cabins are set to meet their escape and auxiliary ventilation needs during fires.

[0007] To achieve the above-mentioned purpose, the present invention discloses a ventilation escape system for a long-distance tunnel-type integrated pipe gallery, wherein the length of the integrated pipe gallery is more than 400 meters and only ground exits are provided at two ends; a gas pipeline is laid in the integrated pipe gallery.

[0008] The gas pipeline is arranged in the gas cabin, and the gas cabin is divided into a plurality of gas cabin fire partitions by flame retardant and fire resistant materials; a normally closed fire door is arranged between every two adjacent gas cabin fire partitions;

[0009] The ventilation escape system includes an exhaust chamber and an air intake and escape passage;

[0010] The exhaust chamber runs through the entire integrated pipe gallery, is arranged above a number of the gas compartment fire partitions, and one end is connected to the exhaust equipment arranged at the ground outlet;

[0011] The exhaust chamber is connected to each of the fire compartments of the gas compartment via a normally open exhaust valve;

[0012] The air inlet and escape passage is arranged on one side of the fire partition of the gas cabin, and one end is connected to the air inlet equipment of the ground outlet;

[0013] A normally open air inlet valve and a normally closed fire door are provided between the air inlet and escape passage and each of the gas compartment fire partitions.

[0014] Preferably, the length of each of the gas compartment fire partitions is less than 200 meters.

[0015] Preferably, the integrated pipe gallery comprises an upper layer and a lower layer; the upper layer is provided with sewage pipes and corresponding sewage tanks; the sewage tanks are divided into a plurality of sewage tank fire partitions by flame-retardant and fire-resistant materials; and a normally open fire door is provided between each two adjacent sewage tank fire partitions;

[0016] The two ends of the sewage tank are respectively connected to the corresponding ground outlets, one end is connected to the air inlet device, and the other end is connected to the exhaust device;

[0017] The lower layer is a comprehensive cabin, which is equipped with water supply pipes and several power cables; the comprehensive cabin is divided into several comprehensive cabin fire partitions corresponding to several sewage tank fire partitions; a normally open fire door is provided between every two adjacent comprehensive cabin fire partitions;

[0018] Both ends of the integrated cabin are connected to the corresponding ground outlets respectively, and one end is connected to the air inlet device, and the other end is connected to the air exhaust device;

[0019] A normally closed air valve connecting the upper layer and the lower layer, as well as a manhole with a fireproof cover are provided between each fire compartment of the integrated cabin and the corresponding fire compartment of the sewage tank.

[0020] Beneficial effects of the present invention:

[0021] The application of the present invention avoids the setting of ground nodes of the pipeline gallery, thereby reducing the construction difficulty, reducing the impact on surrounding plots and saving construction costs, thereby significantly reducing construction costs.

[0022] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram showing a cross section of an embodiment of the present invention.

[0024] Figure 2 Showing the present invention Figure 1 Schematic diagram of the structure and ventilation conditions during normal working conditions in the AA section.

[0025] Figure 3 Showing the present invention Figure 1 Schematic diagram of the structure, ventilation and escape conditions of a fire compartment of a gas tank or a fire compartment of a sewage tank in the AA section when a fire occurs. DETAILED DESCRIPTION

[0026] Example

[0027] like Figure 1 The ventilation escape system of the long-distance tunnel-type integrated pipeline corridor shown in the figure has a length of more than 400 meters and only ground exits at both ends; a gas pipeline 1 is laid in the integrated pipeline corridor.

[0028] The gas pipeline 1 is arranged in the gas compartment, and the gas compartment is divided into a number of gas compartment fire partitions 2 by flame retardant and fire resistant materials; a normally closed fire door 3 is arranged between every two adjacent gas compartment fire partitions 2;

[0029] The ventilation escape system includes an exhaust chamber 4 and an air intake and escape passage 5;

[0030] The exhaust chamber 4 runs through the entire integrated pipe gallery, is arranged above several gas compartment fire partitions 2, and one end is connected to the exhaust equipment arranged at the ground outlet;

[0031] The exhaust chamber 4 is connected to each gas compartment fire partition 2 via a normally open exhaust valve 6;

[0032] The air inlet and escape passage 5 is arranged on one side of the fire compartment 2 of the gas compartment, and one end is connected to the air inlet equipment of the ground outlet;

[0033] A normally open air inlet valve 7 and a normally closed fire door 3 are provided between the air inlet and escape passage 5 and each gas compartment fire partition 2.

[0034] In some embodiments, the length of each gas compartment fire zone 2 is less than 200 meters.

[0035] In certain embodiments, the utility tunnel includes an upper layer and a lower layer;

[0036] The upper layer is provided with sewage pipes 9 and corresponding sewage tanks; the sewage tanks are divided into several sewage tank fire partitions 8 by flame retardant and fire resistant materials; a normally open fire door 11 is provided between every two adjacent sewage tank fire partitions 8;

[0037] Both ends of the sewage tank are connected to the corresponding ground outlets respectively, and one end is connected to the air inlet device, and the other end is connected to the exhaust device;

[0038] The lower level is a comprehensive cabin, which is equipped with water supply pipes and several power cables; the comprehensive cabin is divided into several comprehensive cabin fire partitions 12 corresponding to several sewage tank fire partitions 8; a normally open fire door 11 is provided between every two adjacent comprehensive cabin fire partitions 12;

[0039] Both ends of the integrated cabin are connected to the corresponding ground outlets respectively, and one end is connected to the air inlet equipment, and the other end is connected to the exhaust equipment;

[0040] A normally closed air valve 10 connecting the upper layer and the lower layer, and a manhole 13 with a fireproof cover are provided between each integrated cabin fire compartment 12 and the corresponding sewage tank fire compartment 8.

[0041] In some embodiments, the length of each sewage tank fire partition 8 and the integrated tank fire partition 12 is less than 200 meters.

[0042] Taking an east-west integrated pipeline corridor as an example, the length of the integrated pipeline corridor is more than 600 meters and it needs to pass through a mountain. There are high-end residences on the top of the mountain, and ground exits are set outside the mountain on the east and west sides.

[0043] The cross section of the integrated pipeline corridor is as follows Figure 1 As shown, the upper layer is provided with several gas tank fire partitions 2 and several sewage tank fire partitions 8, and the lower layer is provided with several integrated tank fire partitions 12. Each gas tank fire partition 2 is treated as a special type of cabin and each fire partition needs to be ventilated separately.

[0044] like Figure 2 As shown, under normal working conditions, the air intake equipment located at the ground outlet on the east side inhales external air, which is transported to the air intake and escape passage 5 through the air duct, and then enters each gas compartment fire partition 2 through each normally open air intake valve 7, and finally enters the exhaust chamber 4 through the normally open exhaust valve 6 provided on the top of each gas compartment fire partition 2, and is discharged to the exhaust equipment at the ground outlet on the west side.

[0045] like Figure 3As shown, when a fire occurs in a certain gas compartment fire partition 2, the normally open exhaust valve 6 and the normally open air inlet valve 7 of the gas compartment fire partition 2 are all closed to form a closed space, and other compartments can be ventilated normally without being affected.

[0046] People in the fire compartment 2 of the affected gas cabin can enter the air inlet and escape passage 5 through the normally closed fire door 3 between the fire compartment and the air inlet and escape passage 5, and evacuate to the ground exit on the closer side for escape.

[0047] At this time, the air inlet and escape passage 5 not only meets the ventilation needs of several other unaffected gas compartment fire partitions 2, but also serves as an escape passage.

[0048] like Figure 2 As shown, the integrated pipe gallery is also provided with sewage tanks and integrated tanks on the upper and lower layers respectively. A manhole 11 is provided between each sewage tank fire compartment 8 and each corresponding integrated tank fire compartment 12, and a normally closed air valve 10 connecting the upper layer and the lower layer is provided on the middle plate between each sewage tank fire compartment 8 and the corresponding integrated tank fire compartment 12.

[0049] Under normal operating conditions, the sewage tank draws in external air from the air intake equipment at the east ground outlet, passes through a number of normally open fire doors 11 from each sewage tank fire partition 8 in turn, and is discharged to the exhaust equipment at the west ground outlet.

[0050] The ventilation of the integrated cabin is the same as that of the sewage cabin. External air is drawn in from the air intake equipment at the east ground exit, and passes through several normally open fire doors 11 from each integrated cabin fire partition 12 in turn, and is discharged to the exhaust equipment at the west ground exit.

[0051] like Figure 3 As shown, when a fire occurs in a sewage tank fire compartment 8 or an integrated compartment fire compartment 12, the normally open fire doors 11 on both sides of the affected fire compartment are closed to form an enclosed space to ensure the safety of other unaffected fire compartments, thereby making it impossible for the layer to be ventilated by connecting the fire compartments using the normally open fire doors 11 as in normal operating conditions.

[0052] At this time, open the normally closed air valves 10 of the two sewage tank fire partitions 8 and the integrated cabin fire partition 12 adjacent to the sewage tank fire partition 8 or the integrated cabin fire partition 12 where the fire has occurred, connect the fire partitions on the upper and lower floors where no fire has occurred, and use the cabin on the other floor where no fire has occurred to form a coherent ventilation area for normal ventilation.

[0053] People in the affected fire compartment of the sewage tank fire compartment 8 or the integrated cabin fire compartment 12 can move to the manhole 13 on the near side, open the fire cover and escape into the fire compartment corresponding to another cabin, and then close the fire cover so that the affected fire compartment remains an enclosed space.

[0054] Eventually, they evacuated through the cabins on the unaffected floors to the ground exits on the closer side for escape; at this point, the upper and lower cabins ensured mutual ventilation and escape needs in the event of a fire.

[0055] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A ventilation escape system for a long-distance tunnel-type integrated pipe gallery, wherein the length of the integrated pipe gallery is more than 400 meters and only ground outlets are provided at two ends; a gas pipeline (1) is laid in the integrated pipe gallery; and the characteristics are as follows: The gas pipeline (1) is arranged in a gas cabin, and the gas cabin is divided into a plurality of gas cabin fire partitions (2) by flame retardant and fire resistant materials; a normally closed fire door (3) is arranged between every two adjacent gas cabin fire partitions (2); The ventilation escape system comprises an exhaust chamber (4) and an air intake and escape passage (5); The exhaust chamber (4) runs through the entire length of the integrated pipe gallery, is disposed above a plurality of the gas compartment fire partitions (2), and one end is connected to an exhaust device disposed at the ground outlet; The exhaust chamber (4) is connected to each of the gas compartment fire partitions (2) via a normally open exhaust valve (6); The air inlet and escape passage (5) is arranged on one side of the gas compartment fire partition (2), and one end is connected to the air inlet device of the ground outlet; A normally open air inlet valve (7) and a normally closed fire door (3) are provided between the air inlet and escape passage (5) and each of the gas compartment fire partitions (2); The integrated pipe gallery comprises an upper layer and a lower layer; the upper layer is provided with a sewage pipe (9) and a corresponding sewage tank; the sewage tank is divided into a plurality of sewage tank fire partitions (8) by flame retardant and fire resistant materials; a normally open fire door (11) is provided between each two adjacent sewage tank fire partitions (8); The two ends of the sewage tank are respectively connected to the corresponding ground outlets, one end is connected to the air inlet device, and the other end is connected to the exhaust device; The lower layer is an integrated cabin, which is provided with a water supply pipeline and a plurality of power cables; the integrated cabin is divided into a plurality of integrated cabin fire partitions (12) corresponding to a plurality of sewage tank fire partitions (8); a normally open fire door (11) is provided between each two adjacent integrated cabin fire partitions (12); Both ends of the integrated cabin are connected to the corresponding ground outlets respectively, one end is connected to the air inlet device, and the other end is connected to the air exhaust device; A normally closed air valve (10) communicating with the upper layer and the lower layer, and a manhole (13) with a fireproof cover are provided between each of the integrated compartment fire partitions (12) and the corresponding sewage compartment fire partitions (8).

2. The ventilation escape system for the long-distance tunnel-type integrated pipe gallery according to claim 1 is characterized in that: The length of each of the gas compartment fire partitions (2) is less than 200 meters.

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