Smoke exhausting and ventilating system for tunnel with small section and limited space

Abstract

The utility model relates to a small section confined space tunnel smoke exhaust and ventilation system, which belongs to the technical field of tunnel construction smoke exhaust and ventilation, and comprises a tunnel, axial flow fans are arranged at the top end of the inner wall of the tunnel at equal intervals, one end of each axial flow fan is fixedly connected with an air bag, air is supplied into the tunnel through the air bags, the axial flow fans adopt one-way fans, and the one-way fans adopt one-way fans. And a plurality of air ducts are arranged on the inner wall of the tunnel. The tunnel ventilation device has the advantages that air can be pushed to flow in the axial direction through the blades in the axial flow fans, relay ventilation can be achieved at the positions of the multiple axial flow fans arranged in sequence, then the air circulation speed in a tunnel can be increased, the ventilation function can be achieved, the multiple air ducts are all hung on the inner wall of the tunnel, and the ventilation effect is good. Therefore, the air duct can follow up and extend along with the excavation process of the tunnel, and the air duct is mainly used for guiding air flow to flow in a certain direction so as to achieve the purpose of directional ventilation in the tunnel.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction smoke exhaust ventilation technical field especially small section limited space tunnel smoke exhaust ventilation system. BACKGROUND

[0002] In the tunnel construction process, since the tunnel ventilation facility has not been installed, the whole tunnel ventilation performance is poor, and there is no good ventilation condition, so that the dense smoke generated during hot mix asphalt concrete construction is difficult to quickly remove, which not only seriously affects the health of the construction personnel, but also directly affects the construction quality of the tunnel pavement, and since the dense smoke accumulates in the tunnel, the local oxygen content in the tunnel is too low, which has an adverse effect on the construction machinery, and the asphalt paver engine may stop due to lack of oxygen, in addition, the operation mode of the construction machinery group during the tunnel pavement operation is different from the operation mode during the tunnel excavation, and is more different from the vehicle passing mode during the tunnel traffic operation, therefore, it is of great significance to study the construction ventilation technology during the tunnel pavement construction.

[0003] The existing tunnel ventilation system mainly adopts large fans and pipeline networks, which can ensure the air circulation in the tunnel and the rapid smoke exhaust during the fire, but in the application of small section limited space, it faces the challenges of high cost, large space occupation and high maintenance difficulty. UTILITY MODEL CONTENT

[0004] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a small section limited space tunnel smoke exhaust ventilation system.

[0005] The technical scheme of the utility model is as follows: a small section limited space tunnel smoke exhaust ventilation system, comprising a tunnel, the inner wall top end of the tunnel is equidistantly provided with axial flow fans, one end of two axial flow fans is fixedly connected with a wind bag, and air is supplied into the tunnel through the wind bag, the axial flow fan adopts a one-way fan, the inner wall of the tunnel is provided with a plurality of air ducts, the plurality of air ducts are connected head to tail, the top end of the air duct is provided with a steel wire rope, the bottom end of the steel wire rope is fixedly connected with a clamp, the air duct is hung in the inside of the corresponding clamp, the air duct extends along with the excavation, the bottom end of the inner wall of the tunnel is provided with a working surface, and the working surface is provided with a water curtain dust collector.

[0006] Through the above technical scheme, the external air of the tunnel can enter the axial flow fan through the wind bag, and the air can flow in the axial direction through the blades in the axial flow fan, and the positions of the plurality of sequentially arranged axial flow fans can be relayed to ventilate, thereby the air circulation speed in the tunnel can be increased, so that the ventilation function can be realized.

[0007] As a preferred implementation form, the outer side of the tunnel is provided with an air exhaust assembly, the air exhaust assembly comprises an air compressor room built at the entrance and exit of the tunnel, an air compressor box is arranged in the air compressor room, and an air tank is arranged in the air compressor room and at one side of the air compressor box.

[0008] By adopting the above technical scheme, through the arrangement of the air compressor room, the gas can be compressed, and a large amount of gas can be transported into the tunnel through the air pipe to ensure the normal operation of the construction machinery.

[0009] As a preferred implementation form, the inner wall of the tunnel is provided with an air pipe, the air pipe is arranged along the tunnel wall body at a height from the bottom, and the connecting end of the air tank extends into the interior of the tunnel and is fixedly connected with one end of the air pipe.

[0010] By adopting the above technical scheme, through the arrangement of the air tank, a large amount of compressed air can be stored to ensure that the system can continue to supply air when the air compressor box stops working.

[0011] As a preferred implementation form, the outer side of the air pipe is equidistantly fixedly provided with a tapping port, the tapping port is provided with a connecting flange one away from the air pipe, and a drainage ditch is arranged in the interior of the tunnel.

[0012] By adopting the above technical scheme, through the arrangement of the drainage ditch, the dust and wastewater in the tunnel can be quickly discharged through the drainage ditch, and the accumulation of water in the tunnel is reduced.

[0013] As a preferred implementation form, the connecting flange one away from the tapping port is provided with a high-pressure rubber pipe, the high-pressure rubber pipe is connected with the tapping port through the connecting flange one, and a concrete spraying machine and a drilling machine are arranged in the interior of the tunnel, one end of one of the high-pressure rubber pipes away from the tapping port is connected to the concrete spraying machine, and one end of the other high-pressure rubber pipe away from the tapping port is connected to the drilling machine.

[0014] By adopting the above technical scheme, through the arrangement of the tapping port and the high-pressure rubber pipe, oxygen can be supplied to the spraying machine and the drilling machine.

[0015] As a preferred implementation form, the top of the axial flow fan is fixedly provided with a mounting bracket, the four corners in the interior of the mounting bracket are provided with fixing bolts, and the mounting bracket is connected with the inner wall of the tunnel through the fixing bolts.

[0016] By adopting the above technical scheme, through the arrangement of the fixing bolts, the mounting bracket can be mounted on the inner wall of the tunnel, so as to realize the mounting and disassembly of the axial flow fan.

[0017] As a preferred implementation, both sides of the air duct are fixedly connected with connecting flanges two, one of the air ducts is connected with adjacent air duct through the connecting flanges two, and the inner wall of the tunnel is equidistantly provided with a hanging rack.

[0018] By adopting the technical scheme, the air duct can be adjusted according to the tunnel excavation process to adapt to the tunnel construction of different lengths.

[0019] As a preferred implementation, the end of the steel wire rope away from the clamp is fixedly connected with the hanging rack, and the inner wall of the hanging rack is fixedly installed with a reinforcing rib at an included angle.

[0020] By adopting the technical scheme, the reinforcing rib can increase the supporting strength of the hanging rack and improve the overall stability.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0022] In the utility model, the external air of the tunnel can enter the axial flow fan through the air bag, and the air can flow in the axial direction through the blades in the axial flow fan, and the positions of the sequentially arranged axial flow fans can relay ventilation, thereby increasing the air circulation speed in the tunnel, so that the ventilation function can be realized, and the air ducts are hung on the inner wall of the tunnel, so that the air ducts can follow the extension with the tunnel excavation process, and the main function of the air duct is to guide the air flow to flow in a certain direction to realize the directional ventilation in the tunnel, and the above structure adopts the pressure-in ventilation, and the axial flow fans with different power can be installed according to the length of the tunnel, so that the long tunnel construction ventilation design can be reasonably optimized, and the tunnel fan power and arrangement mode are more economically set to meet the special long tunnel ventilation construction requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 An overall perspective view of the small-section limited-space tunnel smoke exhaust ventilation system is provided in the utility model;

[0024] Figure 2 An internal structure schematic view of the small-section limited-space tunnel smoke exhaust ventilation system is provided in the utility model;

[0025] Figure 3 A partial schematic view of the small-section limited-space tunnel smoke exhaust ventilation system is provided in the utility model;

[0026] Figure 4 A partial schematic view of the small-section limited-space tunnel smoke exhaust ventilation system is provided in the utility model; Figure 3 An enlarged view of A in the utility model.

[0027] Legend: 1, tunnel; 2, drainage ditch; 3, air compressor room; 4, air tank; 5, air compressor box; 6, air pipe; 7, tapping port; 8, connecting flange I; 9, high-pressure rubber pipe; 10, mounting rack; 11, axial flow fan; 12, air duct; 13, connecting flange II; 14, hanging rack; 15, reinforcing rib; 16, water curtain dust collector; 17, clamp; 18, steel wire rope. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] REFERENCE Figures 1-4 A small-section limited-space tunnel smoke exhaust ventilation system, comprising a tunnel 1, the inner wall top of the tunnel 1 is provided with axial flow fans 11 at equal intervals, one end of two axial flow fans 11 is fixedly connected with an air bag, and air is supplied into the tunnel 1 through the air bag, the axial flow fan 11 is a one-way fan, the inner wall of the tunnel 1 is provided with a plurality of air ducts 12, the plurality of air ducts 12 are connected head to tail, the top of the air duct 12 is provided with a steel wire rope 18, the bottom of the steel wire rope 18 is fixedly connected with a clamp 17, the air duct 12 is hung inside the corresponding clamp 17, the air duct 12 extends along with the excavation, the bottom of the inner wall of the tunnel 1 is provided with a working face, the working face is provided with a water curtain dust collector 16, the air outside the tunnel 1 can enter the axial flow fan 11 through the air bag, and the air can be pushed to flow in the axial direction through the blades in the axial flow fan 11, the positions of the plurality of sequentially arranged axial flow fans 11 can be connected in series to ventilate, thereby the air circulation speed in the tunnel 1 can be increased, so that the function of ventilation can be realized, and the plurality of air ducts 12 are hung on the inner wall of the tunnel 1, so that the air duct 12 can extend along with the excavation process of the tunnel 1, and the main function of the air duct 12 is to guide the air flow to flow in a certain direction, so as to realize the purpose of directional ventilation in the tunnel 1, and the above structure adopts forced ventilation, the axial flow fans 11 with different power can be installed according to the length of the tunnel 1, so that the long-tunnel construction ventilation design can be reasonably optimized, and the tunnel fan power and the arrangement mode are more economically set to meet the long-tunnel ventilation construction requirements.

[0030] Specifically, the outer side of the tunnel 1 is provided with an exhaust assembly, which comprises an air compressor room 3 built at the entrance and exit of the tunnel 1, and an air compressor box 5 is arranged in the air compressor room 3. An air tank 4 is arranged inside the air compressor room 3 and on one side of the air compressor box 5. Through the arrangement of the air compressor room 3, the gas can be compressed, and a large amount of gas can be transported into the tunnel 1 through the air pipe 6 to ensure the normal operation of the construction machinery, avoid the phenomenon that the paver or other mechanical engine stops due to lack of oxygen, and the air tank 4 can store a large amount of compressed air to ensure that the system can continue to supply air when the air compressor box 5 stops working, guarantee the continuity of the supply, the inner wall of the tunnel 1 is provided with the air pipe 6, the air pipe 6 is arranged along the wall of the tunnel 1 at a height from the bottom, the connecting end of the air tank 4 extends into the inside of the tunnel 1 and is fixedly connected with one end of the air pipe 6, and the connecting flange one 8 is arranged to facilitate the installation of the high-pressure rubber pipe 9 and the tapping port 7, the air supply distance of the tapping port 7 can be extended, and the ventilation effect can be improved. The outer side of the air pipe 6 is equidistantly fixedly installed with the tapping port 7, the end away from the air pipe 6 of the tapping port 7 is provided with the connecting flange one 8, and the inside of the tunnel 1 is provided with a drainage ditch 2. Through the arrangement of the drainage ditch 2, the dust and wastewater in the tunnel 1 can be quickly discharged through the drainage ditch 2, and the aggregation of water in the tunnel 1 is reduced.

[0031] Specifically, the connecting flange one 8 away from the tapping port 7 is provided with a high-pressure rubber pipe 9, and the high-pressure rubber pipe 9 is connected with the tapping port 7 through the connecting flange one 8. A concrete injection machine and a drilling machine are placed in the tunnel 1, one end of the high-pressure rubber pipe 9 away from the tapping port 7 is connected to the concrete injection machine, and the other end of the high-pressure rubber pipe 9 away from the tapping port 7 is connected to the drilling machine. Through the arrangement of the tapping port 7 and the high-pressure rubber pipe 9, oxygen can be supplied to the injection machine and the drilling machine to ensure the normal operation of the construction machinery in the tunnel 1. The top of the axial flow fan 11 is fixedly installed with a mounting bracket 10, and the four corners in the mounting bracket 10 are provided with fixing bolts. Through the arrangement of the fixing bolts, the mounting bracket 10 can be installed on the inner wall of the tunnel 1 to facilitate the installation and disassembly of the axial flow fan 11. The mounting bracket 10 and the inner wall of the tunnel 1 are connected through the fixing bolts. The two sides of the air cylinder 12 are fixedly connected with the connecting flange two 13. One air cylinder 12 is connected with the adjacent air cylinder 12 through the connecting flange two 13. Through the arrangement of the sectional air cylinder 12, the air cylinder 12 can be adjusted according to the excavation process of the tunnel 1 to adapt to the construction of tunnels 1 of different lengths, thereby improving the applicability of the structure. The inner wall of the tunnel 1 is equidistantly provided with a hanging bracket 14, one end of the steel wire rope 18 away from the clamp 17 is fixedly connected with the hanging bracket 14, and the inner wall of the hanging bracket 14 is fixedly installed with a reinforcing rib 15 at the corner. Through the arrangement of the reinforcing rib 15, the supporting strength of the hanging bracket 14 can be increased, and the overall stability can be improved.

[0032] Working principle: first, in the tunnel 1 import and export position set up air compressor room 3, arrange a air compressor machine box 5 bear the tunnel 1 normal construction process in the excavation and shotcrete construction with wind, and each tunnel 1 wind pipe 6 along the tunnel 1 wall distance from the floor a height of arrangement, until the distance from the working surface 30 meters with diameter 60 millimeter high pressure hose 9 transfer to the wind bag or concrete jet machine, with diameter 30 millimeter high pressure hose 9 transfer to the drilling machine, and in the construction of the hole set a gate valve, every 100m in the hole increase a control gate valve, tunnel 1 exhaust ventilation adopts the way of pressure ventilation smoke, according to the length of the tunnel 1 consider the power of the axial flow fan 11 installation, through the wind bag to the tunnel 1 air supply, and according to the tunnel 1 itself increase 2x4kW axial flow fan 11 relay ventilation, while the positive pressure air supply adopts the diameter of 450 millimeter air duct 12 to the hole air, and through the sectional type air duct 12 setting, can make the air duct 12 according to the tunnel 1 excavation process to adjust, to adapt to the different length of the tunnel 1 construction use, improve the applicability of the structure, and the air duct 12 are hung in 1.8m above the hole wall, and set up water curtain dust catcher 16 at 30m from the working face, through the effect of water curtain dust catcher 16 to implement the dust fall purpose in the tunnel 1, then wait for the excavation after the blasting artificial again for watering dust fall, and open the power fan auxiliary smoke, and meet the requirements of the tunnel ventilation, to reduce the purpose of the tunnel ventilation energy consumption.

[0033] In the description of the present application, it should be explained that, unless otherwise explicitly provided and limited, the terms "installation", "provided with", "connection" and the like should be understood broadly, for example, "connection", can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication between two elements, for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

[0034] The above only for the preferred embodiment of the present application, and does not limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement and the like within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A smoke exhaust ventilation system for a small cross-section confined space tunnel, comprising a tunnel (1), characterized in that: Axial flow fans (11) are equidistantly arranged on the top of the inner wall of the tunnel (1), wherein one end of each of the two axial flow fans (11) is fixedly connected to a wind bag, and air is supplied into the tunnel (1) through the wind bag; The axial flow fan (11) is a one-way fan. The inner wall of the tunnel (1) is provided with a plurality of wind tubes (12). The plurality of wind tubes (12) are connected end to end. The top of each wind tube (12) is provided with a steel wire rope (18). The bottom end of each steel wire rope (18) is fixedly connected with a clamp (17). The wind tubes (12) are hung inside the corresponding clamp (17). The wind tubes (12) extend along with the advancement of excavation. The bottom end of the inner wall of the tunnel (1) is provided with a working surface, and a water curtain dust collector (16) is provided at the working surface.

2. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 1, characterized in that: An exhaust assembly is provided on the outside of the tunnel (1), and the exhaust assembly includes an air compressor room (3) built at the entrance and exit of the tunnel (1), an air compressor box (5) is arranged inside the air compressor room (3), and a gas tank (4) is provided inside the air compressor room (3) and on one side of the air compressor box (5).

3. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 2, characterized in that: An air duct (6) is provided on the inner wall of the tunnel (1), and the air duct (6) is arranged along the wall of the tunnel (1) at a height from the bottom. The connection end of the gas tank (4) extends into the interior of the tunnel (1) and is fixedly connected to one end of the air duct (6).

4. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 3, characterized in that: Branch interfaces (7) are fixedly installed at equal intervals on the outside of the air duct (6), and a connecting flange (8) is provided at one end of the branch interface (7) away from the air duct (6). A drainage ditch (2) is provided inside the tunnel (1).

5. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 4, characterized in that: A high-pressure rubber hose (9) is provided on the side of the connecting flange 1 (8) away from the branch interface (7), and the high-pressure rubber hose (9) is connected to the branch interface (7) via the connecting flange 1 (8). A concrete spraying machine and a drilling machine are placed inside the tunnel (1), and one end of the high-pressure rubber hose (9) away from the branch interface (7) is transferred to the concrete spraying machine, and the other end of the high-pressure rubber hose (9) away from the branch interface (7) is transferred to the drilling machine.

6. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 1, characterized in that: A mounting frame (10) is fixedly mounted on the top of each axial flow fan (11), and fixing bolts are provided at the four corners inside the mounting frame (10). The mounting frame (10) is connected to the inner wall of the tunnel (1) via the fixing bolts.

7. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 1, characterized in that: Both sides of the wind tube (12) are fixedly connected with connecting flanges 2 (13), one wind tube (12) is connected to an adjacent wind tube (12) via connecting flanges 2 (13), and hanging frames (14) are equidistantly provided on the inner wall of the tunnel (1).

8. The smoke exhaust and ventilation system for a small-section confined space tunnel according to claim 1, characterized in that: One end of the steel wire rope (18) away from the clamp (17) is fixedly connected to the hanging frame (14), and reinforcing ribs (15) are fixedly installed at the angles of the inner wall of the hanging frame (14).

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