A distributed natural ventilation air purification system for TBM tunnels

Abstract

A distributed natural ventilation air purification system for a TBM tunnel relates to the technical field of TBM engineering, and includes a distributed dust suction pipe, a chimney, and an air collecting pipe. The chimney is vertically arranged outside the tunnel through a fixing device, a dust collecting bucket is arranged at the bottom of the chimney, a dust outlet is arranged at the bottom of the dust collecting bucket, and a dust collecting box is connected to the dust outlet. The distributed dust suction pipe is composed of a plurality of dust suction pipes, which are evenly distributed on the side wall of the tunnel through a bracket and extend into the tunnel along the direction of the tunnel. The dust suction pipe is provided with a plurality of air inlet pipes, the outer end of the dust suction pipe is connected to the chimney, an inclined mesh filtering mechanism is also provided in the chimney, the air collecting pipe is installed on the top of the chimney through a thrust roller bearing, and the air collecting pipe is interconnected with the chimney, and a guide wing is also provided on the top of the air collecting pipe. The present invention provides a distributed natural ventilation air purification system for a TBM tunnel that can purify the air in the TBM tunnel as a whole, does not consume electricity, and does not waste resources.

Description

Technical Field

[0001] The present invention relates to the technical field of TBM engineering, and in particular to a distributed natural ventilation air purification system for a TBM tunnel. Background Art

[0002] During the TBM tunnel construction process, a large amount of dust will be generated. Due to the narrow and relatively closed space of the tunnel, the dust is difficult to be discharged quickly, resulting in serious environmental pollution in the tunnel and endangering the health of the workers.

[0003] Existing dust removal equipment is divided into dry dust removal equipment and wet dust removal equipment, and there is also a mixture of the two. Both dry dust removal equipment and wet dust removal equipment require a large number of electrical appliances to work, resulting in high energy consumption and high noise in the dust removal process, forming new noise pollution. Moreover, since these dust removal equipment can only remove dust at specific construction sites in the tunnel and cannot purify the overall environment in the tunnel, the physical and mental health of the construction workers cannot be guaranteed. In addition, since dust removal will generate a lot of noise and consume energy and resources (such as water and electricity), the frequency of use of dust removal equipment is reduced or it is idle. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a TBM tunnel distributed natural ventilation air purification system which can purify the air in the TBM tunnel as a whole without consuming electricity or wasting resources.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A distributed natural ventilation air purification system for a TBM tunnel comprises a distributed dust suction pipe, a chimney and an air collecting pipe. The chimney is vertically arranged outside the tunnel through a fixing device, a dust collecting hopper is arranged at the bottom of the chimney, a dust outlet is arranged at the bottom of the dust collecting hopper, and a dust collecting box is connected to the dust outlet. The distributed dust suction pipe is composed of a plurality of dust suction pipes, which are evenly distributed on the side wall of the tunnel through a bracket and extend into the tunnel along the direction of the tunnel. A plurality of air inlet pipes are arranged on the dust suction pipe, the outer end of the dust suction pipe is connected to the chimney, an inclined mesh filtering mechanism is also arranged in the chimney, the air collecting pipe is installed on the top of the chimney through a thrust roller bearing, the air collecting pipe and the chimney are connected to each other, and a guide wing plate is also arranged on the top of the air collecting pipe.

[0007] Preferably, the dust suction pipe is an inclined oblique pipe structure, and the lower end of the inclined pipe structure is threadedly connected to an interface arranged on the side wall of the chimney.

[0008] Preferably, the air inlet pipe is arranged at the upper part of the dust suction pipe, and the air inlet pipe is also an inclined pipe structure, and the opening of the air inlet pipe faces the inside of the tunnel.

[0009] Preferably, the chimney is assembled from a plurality of chimney segments, and adjacent chimney segments are connected via flanges.

[0010] Preferably, the inclined mesh filtering mechanism comprises an inclined filter mesh arranged in the chimney segment, and a spring, one end of the spring is fixedly connected to the middle of the filter mesh, and the other end is fixedly connected to the inner wall surface of the chimney segment through a spring seat.

[0011] Preferably, there are multiple inclined mesh filtering mechanisms, which are evenly distributed in the chimney, and the mesh sizes of the filter screens of the multiple inclined mesh filtering mechanisms increase from bottom to top along the direction of the chimney.

[0012] Preferably, the inner diameter of the chimney is larger than the sum of the inner diameters of the dust suction pipes in the tunnel.

[0013] Preferably, the bracket includes a metal sheet pre-fixed on the inner wall of the tunnel along the longitudinal direction, and support rods evenly distributed on the outer surface of the metal sheet along the longitudinal direction, the bottom end of the support rod is fixedly connected to the metal sheet, and the outer wall surface of the support rod is provided with an external thread and is screwed with a limit nut, and the dust suction tube is clamped between the limit nut and the metal sheet.

[0014] A distributed natural ventilation air purification system for a TBM tunnel of the present invention has the following beneficial effects: the present invention can perform overall dust removal and purification on the environment in the tunnel through distributed dust suction pipes, and the whole process does not consume electricity, does not require water sources, and does not require manual care, which greatly saves resources and costs. In addition, the present invention is an assembled structure, which is easy to disassemble and transport, does not generate a lot of noise when in use, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : A schematic diagram of the structure of the present invention;

[0016] 1: dust suction pipe, 2: bracket, 3: air inlet pipe, 4: chimney segment, 5: filter, 6: spring seat, 7: spring, 8: flange, 9: dust collection bucket, 10: dust collection box, 11: dust outlet, 12: thrust roller bearing, 13: air collection pipe, 14: guide wing plate, 15: interface, 21: metal sheet, 22: support rod, 23: limit nut. DETAILED DESCRIPTION

[0017] The following describes in detail the implementation mode of the present invention in a step-by-step manner. The description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0019] In one embodiment, a TBM tunnel distributed natural ventilation air purification system, such as Figure 1 As shown, it includes a distributed dust suction pipe, a chimney, and an air collecting pipe 13. The chimney is vertically arranged outside the tunnel through a fixing device. A dust collecting hopper 9 is provided at the bottom of the chimney. A dust outlet 11 is provided at the bottom of the dust collecting hopper 9. The dust outlet 11 is connected to a dust collecting box 10. The distributed dust suction pipe is composed of a plurality of dust suction pipes 1. The dust suction pipes 1 are evenly distributed on the side walls of the tunnel through a bracket 2 and extend into the tunnel along the direction of the tunnel. A plurality of air inlet pipes 3 are provided on the dust suction pipes 1. The outer end of the dust suction pipe 1 is connected to the chimney. An inclined mesh filtering mechanism is also provided in the chimney. The air collecting pipe 13 is installed on the top of the chimney through a thrust roller bearing 12, and the air collecting pipe 13 is connected to the chimney. A guide wing plate 14 is also provided on the top of the air collecting pipe 13.

[0020] In a further embodiment, Figure 1 As shown, the dust suction pipe 1 is an inclined oblique pipe structure, and the lower end of the inclined pipe structure is screwed to the interface 15 arranged on the side wall of the chimney.

[0021] In a further embodiment, Figure 1 As shown, the air inlet pipe 3 is arranged at the upper part of the dust suction pipe 1, and the air inlet pipe 3 is also an inclined pipe structure, and the opening of the air inlet pipe 3 faces the inside of the tunnel.

[0022] In a further embodiment, Figure 1 As shown, the chimney is assembled from a plurality of chimney segments 4 , and adjacent chimney segments 4 are connected via flanges 8 .

[0023] In a further embodiment, Figure 1 As shown, the inclined mesh filtering mechanism includes an inclined filter mesh 5 arranged in the chimney segment 4, and a spring 7, one end of the spring 7 is fixedly connected to the middle of the filter mesh 5, and the other end is fixedly connected to the inner wall surface of the chimney segment 4 through a spring seat 6.

[0024] In a further embodiment, Figure 1 As shown, there are multiple inclined mesh filtering mechanisms, which are evenly distributed in the chimney. The mesh sizes of the filter screens 5 of the multiple inclined mesh filtering mechanisms increase from bottom to top along the direction of the chimney.

[0025] In a further embodiment, Figure 1 As shown, the inner diameter of the chimney is larger than the sum of the inner diameters of the dust suction pipes 1 in the tunnel.

[0026] In a further embodiment, Figure 1 As shown, the bracket 2 includes a metal sheet 21 pre-fixed on the inner wall of the tunnel along the longitudinal direction, and a support rod 22 evenly distributed on the outer surface of the metal sheet along the longitudinal direction. The bottom end of the support rod 22 is fixedly connected to the metal sheet 2, and the outer wall surface of the support rod 22 is provided with an external thread and is screwed with a limiting nut 23. The dust suction pipe 1 is clamped between the limiting nut 23 and the metal sheet 2.

[0027] The use principle of the present invention:

[0028] 1. The present invention can remove dust and purify each section inside the tunnel through the distributed dust suction pipe and the air inlet pipe 3 evenly distributed on the upper part of the dust suction pipe;

[0029] 2. The mechanism of dust removal and purification is: due to the effect of narrow tube wind gathering, a fast wind flow will be generated in the wind gathering tube 13, thereby driving the pressure in the wind gathering tube to decrease, and then driving the airflow in the chimney to flow out through the wind gathering tube 13. Since the inner diameter of the chimney is larger than the sum of the inner diameters of the dust suction tube 1 in the tunnel, the gas with dust in the tunnel can flow into the dust suction tube 1 quickly. Since the dust suction tube 1 adopts an inclined tube structure, it is conducive to the sedimentation of dust in the process of dust-carrying gas flow. The settled dust slides into the dust collection bucket 9 at the bottom of the chimney under the action of the airflow and its own gravity, and then slides into the dust collection box 10 from the dust outlet 11. The airflow after sedimentation is discharged upward in the chimney, and the air is further purified through the filtration of the inclined mesh filtering mechanism, and the dust falls into the dust collection box 10;

[0030] 3. The oblique mesh filter mechanism of the present invention is provided with a spring 7. In the process of gas discharge, the spring 7 vibrates to shake off the dust on the filter 5. The mesh numbers of the filter screens of the multiple oblique mesh filter mechanisms gradually increase from bottom to top, and the dust in the air can be filtered step by step until a good air purification effect is achieved. Since the mesh number of the upper filter screen is high and the mesh number of the lower filter screen is low, the dust shaken off the upper filter screen will not be hindered by the lower filter screen and will still fall into the dust collecting box 10;

[0031] 4. The chimney of the present invention adopts an assembled structure, and a plurality of chimney segments 4 are connected to form a chimney as a whole through flanges 8, which is convenient for installation and for setting the height of the chimney according to the environment outside the tunnel. As for the fixing method of the chimney, a bracket can be used or the chimney can be fixed on an existing building or object;

[0032] 5. The bracket 2 used to fix the dust suction pipe 1 of the present invention can use the pipe segment connecting frame commonly used in the tunnel, so that the existing structure is used for fixing, which can further save the installation cost; in addition, the dust suction pipe and the chimney are connected by screw connection, so that the present invention as a whole constitutes an assembled structure, which is convenient for disassembly, assembly and transportation during tunnel construction;

[0033] 6. The dust removal process of the present invention does not consume electricity, does not require the use of water, and does not require manual supervision. Instead, it performs systematic dust removal and purification in the tunnel through natural ventilation, which can provide a good working environment for construction personnel. It is low in cost and easy to install and disassemble, and is suitable for popularization and use.

Claims

1. A distributed natural ventilation air purification system for a TBM tunnel, characterized by: The utility model comprises a distributed dust suction pipe, a chimney and an air collecting pipe. The chimney is vertically arranged outside the tunnel through a fixing device. A dust collecting bucket is arranged at the bottom of the chimney. A dust outlet is arranged at the bottom of the dust collecting bucket. The dust outlet is connected to a dust collecting box. The distributed dust suction pipe is composed of a plurality of dust suction pipes. The dust suction pipes are evenly distributed on the side wall of the tunnel through a bracket and extend into the tunnel along the direction of the tunnel. A plurality of air inlet pipes are arranged on the dust suction pipe. The outer end of the dust suction pipe is connected to the chimney. An inclined mesh filtering mechanism is also arranged in the chimney. The air collecting pipe is installed on the chimney through a thrust roller bearing. The top of the air collecting duct is connected with the chimney, and a guide wing plate is provided on the top of the air collecting duct; the chimney is assembled from a plurality of chimney segments, and adjacent chimney segments are connected by flanges; the inclined mesh filtering mechanism comprises an inclined filter screen arranged in the chimney segment, and a spring, one end of the spring is fixedly connected to the middle of the filter screen, and the other end is fixedly connected to the inner wall surface of the chimney segment through a spring seat; there are a plurality of inclined mesh filtering mechanisms, which are evenly distributed in the chimney, and the mesh sizes of the filter screens of the plurality of inclined mesh filtering mechanisms increase from bottom to top along the direction of the chimney.

2. A TBM tunnel distributed natural ventilation air purification system according to claim 1, characterized in that: The dust suction pipe is an inclined oblique pipe structure, and the lower end of the inclined pipe structure is screwed to an interface arranged on the side wall of the chimney.

3. A TBM tunnel distributed natural ventilation air purification system as claimed in claim 2, characterized in that: The air inlet pipe is arranged at the upper part of the dust suction pipe, and the air inlet pipe is also an inclined pipe structure, and the opening of the air inlet pipe faces the inner side of the tunnel.

4. A TBM tunnel distributed natural ventilation air purification system as claimed in claim 3, characterized in that: The inner diameter of the chimney is greater than the sum of the inner diameters of the dust suction pipes in the tunnel.

5. A TBM tunnel distributed natural ventilation air purification system as claimed in claim 4, characterized in that: The bracket includes a metal sheet pre-fixed on the inner wall of the tunnel along the longitudinal direction, and support rods evenly distributed on the outer surface of the metal sheet along the longitudinal direction. The bottom end of the support rod is fixedly connected to the metal sheet, and the outer wall surface of the support rod is provided with an external thread and is screwed with a limit nut. The dust suction pipe is clamped between the limit nut and the metal sheet.

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