JP4101273B2 - Ventilation device in the tunnel - Google Patents

Description

  The present invention relates to a ventilation device in a tunnel in which a mountain or the like is dug to draw a road.

  In general, in a tunnel where an automobile travels, exhaust gas is filled by the traffic of the automobile, or dust is floating and the environment is extremely bad.

  In order to improve the environment, a large fan is installed in the tunnel, and the inside of the tunnel is ventilated by the rotation of the fan. In a relatively long tunnel, vertical holes are formed at intervals in the length direction, and polluted air is discharged from the vertical holes to the atmosphere.

  By the way, in the ventilation device in the tunnel using a fan, the air in the tunnel is blown in the traveling direction of the automobile by the rotation of the fan. However, since the blowing range by the fan is relatively narrow, the outside air is blown into the tunnel. Insufficient ventilation and ventilation efficiency is poor.

  Further, both the ventilator using a fan and the ventilator exhausting from a vertical hole have a problem of polluting the atmosphere because the polluted air in the tunnel is directly discharged to the atmosphere.

  An object of the present invention is to provide a ventilation device in a tunnel that can effectively ventilate the inside of the tunnel and does not cause the problem of air pollution.

  In order to solve the above problems, in the present invention, a suction cylinder extending in the length direction of the tunnel is provided in the upper portion of the tunnel, and an intake hole for sucking air in the tunnel is provided in the suction cylinder. A feed cylinder, which is formed at a distance in the vertical direction and is inserted into the suction cylinder and forms a suction passage between the inner peripheral surfaces of the suction cylinder, extends radially and penetrates the suction cylinder. A plurality of air injection pipes for exhausting the clear air pumped into the tunnel from one end of the cylinder into the tunnel are provided at intervals in the length direction of the cylinder, and a dust collector for air purification is provided outside the tunnel. And suction force generating means for sucking one end portion of the suction passage to give suction force to the suction hole and sending air in the tunnel sucked into the suction passage from the suction hole to the dust collector; Clean from one end of the cylinder Such than is adopted the configuration in which the air pumping means for pumping air.

  In the ventilation device in the tunnel having the above-described configuration, the dust that floats in the air by the dust collector is sucked into the suction passage by sucking the contaminated air in the tunnel from the suction hole by the operation of the suction force generating means. Remove contaminants such as On the other hand, clear air is pumped into the feed cylinder by the operation of the air pumping means, exhausted from the air injection pipe into the tunnel, and the tunnel is ventilated.

  Here, the suction force generating means may comprise an exhaust passage that communicates one end of the suction passage and the air inlet of the dust collector, and a suction fan incorporated in the exhaust passage. An exhaust passage that communicates one end of the passage with the air inlet of the dust collector and a suction blower incorporated in the middle of the exhaust passage may be used.

  Further, the air pressure feeding means may comprise an air supply passage communicating the clarified air outlet of the dust collector and one end of the air supply cylinder, and an air supply fan incorporated in the air supply passage. Alternatively, it may be an air supply blower that sends outside air into the inside from one end of the cylinder.

  In the ventilation device in a tunnel according to the present invention, each of the plurality of intake holes formed at intervals in the length direction of the suction cylinder has the same size, and the interval between adjacent intake holes is set to one end of the suction cylinder. By gradually reducing the distance from the first part to the other end, it is possible to inhale substantially the same amount of polluted air in the tunnel from each of the plurality of intake holes, and effectively suck and remove the polluted air over the entire length of the tunnel. be able to.

  Further, the interval between the plurality of intake holes formed at intervals in the length direction of the suction cylinder is made substantially constant, and the size of the plurality of intake holes is set to the intake air located at one end of the suction cylinder By gradually increasing the size from the hole to the intake hole located at the other end, it is possible to inhale substantially the same amount of contaminated air in the tunnel from each of the plurality of intake holes. Contaminated air can be effectively removed by suction.

  Further, each of the suction cylinder and the feeding cylinder is divided into two in the length direction, and a dust collector and a suction force generating means are connected to each end of the divided suction passage formed by the division on the tunnel entrance side, and the divided feeding is performed. By connecting the air pressure feeding means to each end of the tunnel entrance / exit side of the cylinder, the suction force applied to each of the plurality of intake holes can be increased, and the amount of clarified air supplied to the inside of the feed cylinder can be increased. Since the increase can be aimed at, the inside of a tunnel can be ventilated more effectively.

  In the ventilator according to the present invention, suction force is applied to the intake hole by the operation of the suction force generating means, and the contaminated air in the tunnel is sucked into the suction passage from the intake hole and guided into the dust collector, and the dust collector The pollutant contained in the polluted air is removed, and on the other hand, clear air is sent into the feed cylinder by the operation of the air pressure feeding means, and it is sent into the tunnel from the air injection pipe, so it is effective throughout the tunnel. Can be ventilated.

  Moreover, since the pollutant in the polluted air taken in from the tunnel is removed by the dust collector, there is no inconvenience that the atmosphere is polluted.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a suction cylinder 2 is provided on the upper side in the tunnel 1. The suction cylinder 2 has an outer diameter of about 600 mm to 800 mm, and has a length that covers almost the entire length of the tunnel 1.

  As shown in FIG. 3, a plurality of intake holes 3 are formed in the suction cylinder 2 at intervals in the length direction of the suction cylinder 2. Here, although the intake hole 3 has been shown to be composed of a plurality of holes, the intake hole 3 is not limited thereto. For example, the suction tube 2 may be formed of a long and narrow square hole (slit) in the length direction, or may be formed of a long and narrow slit in the circumferential direction of the suction tube 2. Further, the suction holes 3 may be formed at intervals in the circumferential direction of the suction cylinder 2, and the suction holes 3 arranged in the circumferential direction may be formed at intervals in the length direction of the suction cylinder 2.

  The suction cylinder 2 may be made of a metal such as stainless steel, iron, or aluminum, or may be made of a synthetic resin.

  As shown in FIGS. 1 and 3, a feeding cylinder 4 having the same length as the suction cylinder 2 is inserted inside the suction cylinder 2. The feed cylinder 4 has an outer diameter of about 200 mm to 300 mm, and a suction passage 5 is formed between the feed cylinder 4 and the suction cylinder 2. Both ends of the suction passage 5 are closed.

  A plurality of air injection pipes 6 are formed in the feed cylinder 4 at intervals in the length direction of the feed cylinder 4. The air injection pipe 6 extends in the radial direction of the feed cylinder 4 and penetrates the suction cylinder 2. In the embodiment, a plurality of air injection pipes 6 arranged in a line in the axial direction are set as one unit in the upper outer periphery of the feed cylinder 4, and the group of air injection pipes 6 is formed at intervals in the length direction of the feed cylinder 4. However, one air injection pipe 6 may be formed at intervals in the length direction of the feed cylinder 4.

  As shown in FIG. 1, outside the tunnel 1, a dust collector 7 that traps contaminants such as dust floating in the contaminated air and forms purified air, and one end of the suction passage 5 are sucked. A suction force generating means 20 that applies a suction force to each of the plurality of intake holes 3 and an air pressure feeding means 30 that pumps clear air from one end of the feed cylinder 4 to the inside are provided.

  Here, a wet dust collector is employed as the dust collector 7. As shown in FIG. 4, the dust collector 7 divides the inside of the water storage tank 8 into a purification chamber 9 and an exhaust chamber 10 by attaching a filter F, and an inlet 11 is provided on the peripheral wall of the purification chamber 9. An outlet 12 is formed in the peripheral wall of the slag. A water sprinkling pipe 13 is disposed on the water accumulating at the bottom in the purification chamber 9, and the water stored in the purification chamber 9 is driven by driving a pump 14 connected to the water sprinkling pipe 13. Contaminants in the polluted air sent into the purification chamber 9 from the inlet 11 are removed by contact with spray water that is sent to the water sprinkling pipe 13 and sprayed from a number of nozzles formed in the water sprinkling pipe 13.

  Further, when the air in the purification chamber 9 passes through the filter F, a trace amount of contaminants contained in the air is removed, and the purified air is exhausted from the outlet 12.

  As shown in FIG. 2, the suction force generating means 20 connects the inlet 11 of the dust collector 7 and one end of the suction passage 5 with an exhaust passage 21, and incorporates a suction fan 22 in the exhaust passage 21, The suction fan 22 is rotated by driving the motor 23 so that the air in the suction passage 5 is sent into the dust collector 7.

  The air pressure feeding means 30 connects the outlet 12 of the dust collector 7 and one end of the cylinder 4 by an air supply passage 31, and an air supply fan 32 is incorporated in the air supply passage 31. The purified air discharged from the outlet 12 of the dust collector 7 is fed into the feed cylinder 4 by rotating the motor 33 by driving the motor 33.

  The ventilation device in the tunnel shown in the embodiment has the above-described structure. When ventilation in the tunnel 1 is performed, the suction fan 22 incorporated in the exhaust passage 21 is rotated and the ventilation passage 31 is incorporated. The air supply fan 32 is rotated.

  Since the air in the suction passage 5 is drawn into the exhaust passage 21 by the rotation of the suction fan 22, a suction force is applied to the suction hole 3 of the suction cylinder 2. Air is sucked into the suction passage 5 from the suction hole 3.

  At this time, the suction holes 3 are formed at intervals in the length direction of the suction cylinder 2, and the suction cylinder 2 has a length substantially equal to the length of the tunnel 1. It will be sucked into the suction passage 5 over the entire length.

  Air sucked into the suction passage 5 is sent into the dust collector 7 from the exhaust passage 21, and contaminants such as dust contained in the air are removed by the dust collector 7, and purified air is exhausted to the outlet 12.

  Further, the purified air exhausted from the outlet 12 is sent into the feed cylinder 4 from the supply passage 31 and is discharged into the tunnel 1 from the air injection pipe 6 provided in the feed cylinder 4.

  At this time, the air injection pipes 6 are provided at intervals in the length direction of the feed cylinder 4, and the feed cylinder 4 is substantially equal to the length of the tunnel 1, so that purified air is discharged over almost the entire length in the tunnel 1. Therefore, the tunnel 1 is ventilated over the entire length by the replacement of the air in the tunnel 1 and the purified air.

  Thus, in the ventilator shown in the embodiment, by the rotation of the suction fan 22, the contaminated air inside the entire length of the tunnel 1 is sucked into the suction passage 5 from the suction hole 3 and sent into the dust collector 7, Contaminants such as dust floating in the air are removed by the dust collector 7, and purified air is sent into the feed cylinder 4 from the feed passage 31 by the rotation of the feed fan 32, and exhausted into the tunnel 1 from the air injection pipe 6. Therefore, the tunnel 1 can be effectively ventilated over the entire length.

  Moreover, since the pollutant in the contaminated air in the tunnel 1 is removed by the dust collector 7 and the purified air is sent into the tunnel 1, there is no inconvenience that the atmosphere is polluted.

  FIG. 5 shows another embodiment of the ventilation device in the tunnel according to the present invention. This embodiment is different from the embodiment shown in FIGS. 1 to 4 in the configuration of the suction force generating means 20 and the air pressure feeding means 30 and the shape of the intake hole 3.

  The suction force generating means 20 incorporates a suction blower 24 in an exhaust passage 21 that connects one end of the suction passage 5 and the inlet 11 of the dust collector 7, and sucks air in the suction cylinder 2 by driving the suction blower 24. Then, a suction force is applied to the suction hole 3, and the contaminated air in the tunnel 1 sucked into the suction passage 5 from the suction hole 3 is sent to the dust collector 7.

  The air pressure feeding means 30 connects an air supply blower 34 to an end of an air supply passage 31 connected to one end of the air supply cylinder 4, and drives the air supply blower 34 to send outside air into the air supply cylinder 4. I am doing so.

The intake hole 3 is composed of a slit elongated in the axial direction of the suction cylinder 2. When forming the suction holes 3 formed of the slits, as shown in FIG. 6, the plurality of suction holes 3 formed at intervals in the axial direction of the suction cylinder 2 are all the same size, and between the adjacent suction holes 3. The distances L _{1 to} L _n are spaced from the distance L ₁ between the suction holes 3 located on one end side of the suction cylinder 2 to which the suction force is applied by the suction force generating means 20 to the other end side of the suction cylinder 2. by gradually smaller as leading to spacing L _n between the inlet openings 3 positioned, it can be substantially the same amount of intake contamination air tunnel 1 from each of the plurality of intake holes 3, contaminated air over the entire length of the tunnel 1 Can be effectively removed by suction.

  In addition, as shown in FIG. 7, the interval between the plurality of suction holes 3 formed at intervals in the length direction of the suction cylinder 2 is made substantially constant, and the size of the plurality of suction holes 3 is set to the suction cylinder. 2 gradually increases from the intake hole 3 located at one end to the intake hole 3 located at the other end, so that the amount of contaminated air in the tunnel 1 is substantially equal from each of the plurality of intake holes 3. The air can be inhaled, and the contaminated air can be effectively sucked and removed over the entire length of the tunnel 1 as described above.

  Here, in order to gradually increase the size of the plurality of intake holes 3 from the intake hole 3 located at one end of the suction cylinder 2 to the intake hole 3 located at the other end, the intake hole 3 The size of itself may be changed, or the number of intake holes 3 having a certain size may be changed. When the number is changed, a plurality of intake holes 3 are formed at intervals in the circumferential direction of the suction cylinder 2.

6 and 7, the interval between the intake holes 3 and the size of the intake holes 3 depend on the outer diameter and length of the suction cylinder 2 and the feed cylinder 4 and the air volume of the suction blower 24. Determine as appropriate. For example, the suction blower 24 has an air volume of 115 m ³ / min, a static pressure of 11.76 kpa, an outer diameter of the suction cylinder 2 of 800 mm, a length of 2 km, an outer diameter of the feed cylinder 4 of 300 mm, and a length of about 2 km. In this case, the interval between the suction holes 3 is set to about 450 m, the size of the suction holes 3 is set to about 2 mm in width and about 250 mm in length, and the suction hole 3 located at one end of the suction tube 2 is connected to the other end. The number of intake holes 3 is increased as it reaches the intake holes 3 located in the section.

Although not shown in the figure, the distances L _{1 to} L _n between the adjacent intake holes 3 are between the intake holes 3 positioned on one end side of the suction cylinder 2 to which the suction force is applied by the suction force generating means 20. gradually decreases as the leading from distance L ₁ to the distance L _n between the suction hole 3 located at the other end of the suction tube 2, and the size of the air inlet 3 at one end of the suction tube 2 By gradually increasing the size from the intake hole 3 positioned to the intake hole 3 positioned at the other end, the contaminated air can be sucked and removed more effectively over the entire length of the tunnel 1.

  Also in the embodiment shown in FIG. 5, the pollutant in the polluted air in the tunnel 1 is removed by the dust collector 7 and the purified air is exhausted to the outside, so that there is no inconvenience that the atmosphere is polluted.

  In FIG. 5, the suction blower 24 and the air supply blower 34 are each provided as one unit. However, a plurality of the suction blowers 24 and the air supply blowers 34 are provided, and the plurality of suction blowers 24 and the air supply blowers 34 are respectively connected in series. To increase the suction force and the air supply pressure.

  FIG. 8 shows another example of the air injection tube 6. The air injection pipe 6 shown in this example includes a first pipe 6a extending in the radial direction from the outer periphery of the feed cylinder 4 and penetrating the suction cylinder 2, and a first pipe 6a extending in the width direction of the tunnel 1 perpendicular to the first pipe 6a. It consists of two pipes 6b, and is configured such that inclined pipe parts 6c that are inclined downward are provided at both ends of the second pipe 6b, and the clear air that is pumped to the feed cylinder 4 is supplied to the tip of the inclined pipe part 6c. Are jetted obliquely downward toward the wall surfaces on both sides of the tunnel 1.

  As described above, the clear air is jetted obliquely downward toward the wall surface of the tunnel 1, so that the wall surfaces on both sides of the tunnel 1 can be prevented from being contaminated by exhaust gas or the like.

  FIG. 9 shows still another example of a ventilation device in a tunnel according to the present invention. In this example, each of the suction cylinder 2 and the feed cylinder 4 is divided into two in the length direction, and the dust collector 7 and the suction force are generated at the ends of the divided suction passages 5a and 5b formed by the division on the tunnel entrance / exit side, respectively. The means 20 is connected, and the air pressure feeding means 30 is connected to the respective ends of the divided cylinders 4a and 4b on the tunnel entrance side.

  By configuring as described above, the suction force applied to each of the plurality of intake holes 3 can be increased, and the supply amount of clarified air into the feed cylinder 4 can be increased. The inside of the tunnel 1 can be ventilated more effectively.

Vertical front view showing an embodiment of a ventilation device in a tunnel according to the present invention Longitudinal front view of the dust collector installed outside the tunnel (I) is a cross-sectional view showing an enlarged part of a suction cylinder provided in the tunnel, (II) is a cross-sectional view taken along the line II of (I), and (III) is a lower view of (I). Sectional view along line Cross section of dust collector Sectional drawing which shows the other example of the ventilation apparatus in the tunnel which concerns on this invention Sectional drawing which shows the other example of a suction cylinder Sectional drawing which shows another example of a suction cylinder Sectional drawing which shows the other example of an air injection pipe Sectional drawing which shows the further another example of the ventilation apparatus in the tunnel which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tunnel 2 Suction cylinder 3 Intake hole 4 Feed cylinder 4a Division feed cylinder 4b Division feed cylinder 5 Suction passage 5a Division suction passage 5b Division suction passage 6 Air injection pipe 7 Dust collector 11 Inlet 12 Outlet 20 Suction force generation means 21 Exhaust passage 22 Suction Fan 24 Suction blower 30 Air pressure feeding means 31 Air supply passage 32 Air supply fan 34 Air supply blower

Claims (8)

  A suction cylinder extending in the length direction of the tunnel is provided on the upper side of the tunnel, and suction holes for sucking air in the tunnel are formed in the suction cylinder at intervals in the length direction of the suction cylinder. The feed cylinder that is inserted into the suction cylinder and forms a suction passage between the inner peripheral surfaces of the suction cylinder extends in the radial direction and penetrates the suction cylinder, and is clarified that is pumped into the inside from one end of the feed cylinder. A plurality of air injection pipes for exhausting fresh air into the tunnel are provided at intervals in the length direction of the cylinder, and a dust collector for air purification and one end of the suction passage are sucked outside the tunnel. A suction force generating means for applying a suction force to the suction hole and sending the air in the tunnel sucked into the suction passage from the suction hole to the dust collector; Air pumping means for pumping air Ventilation devices in the panel.   2. The ventilation device in a tunnel according to claim 1, wherein the suction force generating means includes an exhaust passage communicating one end portion of the suction passage with an air inlet of the dust collector, and a suction fan incorporated in the exhaust passage. .   The ventilation in a tunnel according to claim 1, wherein the suction force generating means comprises an exhaust passage communicating one end of the suction passage with an air inlet of the dust collector, and a suction blower incorporated in the middle of the exhaust passage. apparatus.   The air pressure feeding means includes an air supply passage that communicates the clarified air outlet of the dust collector and one end of the air supply cylinder, and an air supply fan incorporated in the air supply passage. A ventilation device in a tunnel according to claim 1.   The inside of the tunnel according to any one of claims 1 to 3, wherein the air pressure feeding means includes an air supply passage connected to one end of the air supply cylinder and an air supply blower for sending outside air into the air supply passage. Ventilation equipment.   Each of the plurality of intake holes formed at intervals in the length direction of the suction cylinder has the same size, and the interval between adjacent intake holes is gradually increased from one end of the suction cylinder to the other end. The ventilation apparatus in a tunnel of any one of Claims 1 thru | or 5 made small.   The intervals between the plurality of intake holes formed at intervals in the length direction of the suction cylinder are made substantially constant, and the size of the plurality of intake holes is set to the intake hole located at one end of the suction cylinder The ventilation device in a tunnel according to any one of claims 1 to 5, wherein the ventilation device is gradually increased from the inlet to the intake hole located at the other end. Wherein each of the suction tube and feed cylinder divided into two in the longitudinal direction, the tunnel other entrance end and tunnel the other entrance side divided suction passage tunnel whereas entrance side of the split formed by the tunnel on the other hand entrance side divided suction passages A dust collector and suction force generating means are connected to each of the end portions on the side, and the end portion on the tunnel side of the tunnel one inlet / outlet side split-feed cylinder and the end portion on the tunnel other side of the tunnel other inlet / outlet side split-feed cylinder The ventilation device in a tunnel according to claim 1, wherein an air pressure feeding means is connected to each of the two .

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