JP4262062B2 - Ventilation device in the tunnel - Google Patents

Description

  The present invention relates to a ventilator in a tunnel, and more particularly to a ventilator in a tunnel suitable for being provided in a tunnel having a large curvature curve.

When constructing large underground structures or excavating mountain tunnels, a large amount of dust is generated along with the excavation work. If dust remains in the tunnel, there is a risk of damaging the health of workers such as pneumoconiosis. In particular, ventilation devices are known for discharging dust in the work area near the face to the outside of the tunnel. . As such a ventilator, there is one disclosed in JP 2001-323800 A. This ventilator has a telescopic wind pipe that can be expanded and contracted inside the wind pipe, the end of the wind pipe is connected to a movable blower, and the tip of the telescopic wind pipe is opened at an arbitrary location for tunnel excavation. It is to be stretched and ventilated. In this ventilator, the telescopic wind tube is suspended from the rail, and the telescopic wind tube is expanded and contracted by moving the telescopic wind tube along the rail.
JP 2001-323800 A

  By the way, when a curve is formed in a tunnel, since the curvature is set small, a tunnel that bends greatly is rarely provided. However, some tunnels through which construction vehicles pass and tunnels provided for emergency evacuation have a large curvature.

  As described above, when a tunnel having a large curvature is provided, if the ventilation device described in Patent Document 1 is provided, a rail that guides the telescopic wind tube also has a large curvature. When trying to guide the telescopic wind pipe with such a rail having a large curvature, the telescopic wind pipe cannot move smoothly along the rail, and there is a problem that the telescopic wind pipe cannot be smoothly expanded and contracted. was there.

  Then, the subject of this invention is providing the ventilation apparatus in a tunnel provided with the expansion-contraction wind pipe which can be extended-contracted smoothly, even when providing in a tunnel with a big curvature.

A tunnel ventilator according to the present invention that has solved the above-mentioned problems is provided with a flexible expandable wind pipe body provided inside the tunnel, introducing air from one end of the wind pipe body, and the wind pipe It has a telescopic wind pipe that discharges air from the other end of the main body, a rail that extends in the tunnel excavation direction is provided, a plurality of moving members are provided on the rail, and a telescopic wind pipe is suspended from the plurality of moving members In the ventilation device in the tunnel in which the telescopic wind tube can be expanded and contracted by the movement of the plurality of moving members, in the extending direction of the telescopic wind tube at each connection portion of the plurality of moving members and the telescopic wind tube A plurality of ring members are attached to the wind pipe body so as to be spaced apart from each other in the extending direction, and the belt member includes an upper belt and a lower belt sandwiching the plurality of ring members. it is one that is equipped.

  In the ventilation device in a tunnel according to the present invention, a belt member is provided at each connection portion between the plurality of moving members and the telescopic wind pipe. This belt member can reliably guide the telescopic wind tube along the rail even in a tunnel having a large curvature, and thus can contribute to smooth expansion and contraction of the telescopic wind tube. Furthermore, since the belt member is provided, the force applied to the telescopic wind tube when the telescopic wind tube expands and contracts can be reduced, so that the telescopic wind tube can be prevented from being damaged.

Here, the belt member can be provided at the upper central position of the telescopic wind tube.

Here, a plurality of ring members can be alternately sandwiched between the upper belt and the lower belt along the extending direction.

  ADVANTAGE OF THE INVENTION According to this invention, even when providing in a tunnel with a big curvature, the ventilation apparatus in a tunnel provided with the telescopic wind pipe which can be extended-contracted smoothly can be provided.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a plan sectional view of a tunnel provided with a ventilation device in a tunnel according to the present invention, FIG. 2 is a partially broken perspective view of the ventilation device according to the present invention, and FIG. 3 is a perspective view of a telescopic wind tube. FIG.

  As shown in FIGS. 1 and 2, the ventilator 1 according to the present embodiment includes a telescopic wind tube 2. The telescopic wind tube 2 is formed by connecting a plurality of expandable wind tube bodies 3. The wind pipe body 3 is made of vinyl and has flexibility, and the wind pipe bodies 3 are connected to each other by a connecting pipe 4. As each of the wind tube main bodies 3 expands and contracts, the expandable wind tube 2 expands and contracts as a whole.

  The wind pipe main body 3 has a length of 10 to 50 m, for example, in an extended state. By connecting a plurality of wind pipe main bodies 3 with connecting pipes 4, for example, the length of the wind pipe main body 3 is about 150 m in the extended state. The telescopic wind tube 2 is formed. When the telescopic wind tube 2 contracts, the length becomes, for example, about 50 m. Moreover, the connection part of the wind pipe main body 3 and the connection pipe 4 is fixed with a band member and sealed so as to maintain an airtight state.

  Further, in the tunnel T provided with the ventilation device 1, a curve having a relatively large curvature is formed. The telescopic wind pipe 2 in the ventilation device 1 can move along the curve of the tunnel T.

  As shown in FIG. 3, a plurality of metal ring members 5 are provided inside the wind pipe body 3. The plurality of ring members 5 are attached to the wind tube main body 3 in the expansion / contraction direction (extending direction) with a predetermined interval. The ring member 5 has non-deformability (hardness), and is fixed from the surface side of the wind tube main body 3 by a heating adhesive portion of the adhesive sheet. Thus, the opening shape of the wind tube body 3 is maintained so that the wind tube body 3 is not crushed and its passage (air flow path) is not blocked. Moreover, deterioration of the ring member 5 and the wind pipe main body 3 is prevented by the adhesive tape.

  As shown in FIG. 1, a bell mouth 6 is attached to the distal end portion of the telescopic wind tube 2. In the face work area near the face K in the tunnel T, excavation work or the like by the free-section excavator M is performed, and dust is generated by the excavation work or the like. The generated dust is introduced into the inside of the wind tube body through the bell mouth 6 together with air. A dust collector 7 is attached to the rear end of the telescopic wind tube 2. The dust collector 7 includes a blower (not shown). By driving the blower, a suction force is generated to flow air from the front end portion of the telescopic wind tube 2 to the rear end portion side. The dust generated in the vicinity of the face work area via the bell mouth 6 is sucked together with air and sent to the dust collector 7 via the telescopic wind tube 2.

  The dust collector 7 collects the sent dust. The dust collector 7 is mounted on a vehicle (not shown), and the dust collector 7 can be moved by moving the vehicle. The dust collector 7 and the telescopic wind tube 2 constitute a ventilation device in the tunnel. Further, the telescopic wind tube 2 is suspended from above at a position slightly lateral to the center position in the width direction of the tunnel T as viewed from the front of the tunnel T.

  A belt member 8 is attached to the upper central position of the telescopic wind tube 2 along the extending direction of the telescopic wind tube 2. The belt member 8 includes an upper belt 8A and a lower belt 8B. Of these, the lower belt 8 </ b> B is affixed in close contact with the telescopic wind tube 2. On the other hand, the upper belt 8 </ b> A is alternately disposed in a wave shape above and below the adjacent ring members 5.

  Furthermore, as shown in FIG. 4, the upper belt 8 </ b> A is attached to the lower side of the ring member 5, and the upper belt 8 </ b> A and the lower belt 8 </ b> B are attached to each other. Then, the ring member 5 is sandwiched between the upper belt 8A and the lower belt 8B.

  Further, as shown in FIG. 2, a telescopic drive device 9 is provided above the telescopic wind tube 2. The telescopic drive device 9 includes a first rail 10 provided at an obliquely upper position of the tunnel T and a second rail 11 provided below the first rail 10. The first rail 10 is provided with a plurality of moving brackets 13 which are moving members of the present invention, and the moving bracket 13 is provided with a suspension hook 14 having a J-shaped cross section. The ring member 5 is suspended by the suspension hook 14. A belt member 8 is interposed at a connecting portion between the moving bracket 13 and the telescopic wind tube 2.

  A roller 15 is provided above the moving bracket 13. The roller 15 can travel with respect to the second rail 11. In addition, a driving device (not shown) is provided at the distal end portion of the telescopic driving device 9. By pulling the moving bracket 13 by this driving device, each moving bracket 13 moves forward in conjunction.

  Further, as shown in FIG. 1, the first rail 10 is suspended by a truck 16. The truck 16 is suspended from a turnbuckle suspended from the upper part of the tunnel T. Further, the trolley 16 has a roller 18, and the first rail 10 and the second rail 11 are moved relative to the tunnel T by rolling the roller 18.

  Furthermore, a stay 20 is provided inside the connecting pipe 4. The stay 20 includes four bar members 21 and is arranged at equal intervals on a circle that is slightly smaller than the circle when the connection pipe 4 is viewed from the front. It is arrange | positioned along the expansion-contraction direction. Further, the tip of the bar 21 is slightly bent toward the center of the telescopic wind tube 2, and the bar 21 smoothly enters the inside of the wind tube body 3 when the telescopic wind tube 2 contracts. The flexible wind pipe is smoothly guided to the connecting pipe 4.

  Further, as shown in FIG. 4, a pin 30 which is a curve arrangement auxiliary member of the present invention is arranged at the center position of the moving bracket 13. The pin 30 has a cylindrical shape extending in the vertical direction. The pin 30 is fixed to the block body 31 by welding, and the block body 31 can be accommodated in a space 13 </ b> A formed in the center of the moving bracket 13.

  The pin 30 is attached to the moving bracket 13 by accommodating the block body 31 in the space 13A. The pins 30 are provided at equal intervals in a ratio of one pin 30 to the three moving brackets 13 among the plurality of moving brackets 13. By interposing this pin 30, when the telescopic wind tube 2 contracts at the curve position, the adjacent moving brackets 13 are relatively inclined and arranged on the curve in plan view.

  As shown in FIG. 5, the block body 31 is removable from the moving bracket 13. By removing the block body 31 from the moving bracket 13, the pin 30 is removed from between the moving brackets 13. Further, by accommodating the block body 31 in the moving member, the pin 30 is interposed between the moving brackets 13.

  The operation of the ventilator according to this embodiment having the above configuration will be described.

  In the ventilator 1 according to the present embodiment, as the excavation of the tunnel T proceeds, the telescopic wind tube 2 is repeatedly expanded and contracted, and the tip bell mouth 6 is continuously moved to the position near the face K. The expansion / contraction movement of the telescopic wind tube 2 is performed by pulling the moving bracket 13 provided at the distal end portion with a driving device provided at the distal end portion of the expansion / contraction driving device 9, thereby moving the following moving bracket 13 via the telescopic wind tube 2. This is done by moving.

  As described above, when the moving bracket 13 is moved, the subsequent moving bracket 13 is pulled via the telescopic wind tube 2, but the force is reliably transmitted to the subsequent moving bracket 13 only by the telescopic wind tube 2. I can't. In order to transmit the force to the succeeding moving bracket 13, for example, both sides of the moving brackets 13 which are front and rear (adjacent) can be connected with a chain. However, this is especially true at the curve position in the tunnel T. Is transmitted to one side and reliable transmission of force cannot be performed.

  At this time, in this embodiment, the force between the movable brackets 13 is transmitted through the belt member 8 provided at the upper center position of the telescopic wind tube 2. Thus, since the belt member 8 is interposed, force can be reliably transmitted between the moving brackets 13, so that the moving bracket 13 and the telescopic wind tube 2 can be smoothly moved. .

  Further, the belt member 8 is provided at the upper central position of the telescopic wind tube 2, which is a connection portion with the moving bracket 13. For this reason, even if it is a case where the curve position of the tunnel T is approached, force can be reliably transmitted to the subsequent moving bracket 13. Therefore, the telescopic wind tube 2 and the moving bracket 13 can be smoothly contracted. In addition, since the force is transmitted through the belt member 8, the load on the force applied to the telescopic wind tube 2 is reduced, and therefore the breakage of the telescopic wind tube 2 can be prevented.

  Furthermore, in the ventilator 1 according to the present embodiment, the pins 30 are interposed at appropriate positions in the plurality of moving brackets 13, specifically, at a ratio of one place in three places. As shown in FIG. 7, the moving brackets 13 are arranged in a straight line at a position where the pin 30 is not interposed between the moving brackets 13. Moreover, in the position where the pin 30 is interposed between the moving brackets 13, the moving brackets 13 are arranged in a bent state.

  In this manner, the moving brackets 13 are arranged in a curved line by providing the pins 30 at appropriate positions in the plurality of moving brackets 13. For this reason, in the curve positions in the tunnel T shown in FIG. 1, by interposing the pins 30 at these positions, the adjacent moving brackets 13 are relatively arranged on the curve to adjust the positional relationship between them. . In this way, the moving brackets 13 can be arranged in a curved line corresponding to the curve of the tunnel T. Therefore, the movable bracket 13 and the telescopic wind pipe 2 suspended from the movable bracket 13 can be smoothly contracted along the rails 10 and 11 provided in the telescopic drive device 9.

  On the other hand, the block body 31 and the pin 30 are removed from the moving bracket 13 in the straight portion of the tunnel T. When the pin 30 is removed, it is arranged in a parallel state between the adjacent moving brackets 13, and the moving brackets 13 can be arranged in a straight line. Therefore, when it is arranged at the straight line position of the tunnel T, it can contribute to smooth expansion and contraction at the straight line position in the tunnel T by removing the pin 30.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the pin 30 interposed between the movable brackets 13 is configured to be fixed to the block body 31 by welding, but may be appropriately changed to other modes.

  Moreover, in the said embodiment, although the pin 30 used as a curve arrangement | positioning auxiliary member has comprised the cylindrical shape used as a cross-sectional circle shape, it can also be set as appropriate shapes, such as a columnar body of a cross-sectional polygonal shape. Furthermore, it is possible to adopt a mode in which different shapes of the curve arrangement assisting members are used according to the curvature of the tunnel.

It is a plane sectional view of a tunnel provided with a ventilation device in the tunnel. It is a partially broken principal part perspective view of a ventilator. It is a perspective view of a telescopic wind pipe. It is an expansion perspective view of the connection part of a movement bracket and a telescopic wind pipe. It is a perspective view which shows the state which accommodates a block body in a movement bracket. 4 is a plan view showing a state in which moving brackets are arranged in a curved portion of a tunnel T. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ventilator 2 ... Telescopic wind pipe 3 ... Wind pipe main body 4 ... Connection pipe 5 ... Ring member 6 ... Bell mouth 7 ... Dust collector 8 ... Belt member 8A ... Upper belt 8B ... Lower belt 9 ... Telescopic drive device 10 ... First Rail 11 ... second rail 13 ... moving bracket 13A ... space 14 ... hanging hook 15 ... roller 16 ... cart 18 ... roller 20 ... stay 21 ... bar 30 ... pin 31 ... block body K ... face M ... free section excavator T ... Tunnel

Claims (3)

A telescopic wind pipe body provided inside the tunnel and having a flexible expandable / contractible structure, and having an extendable wind pipe that introduces air from one end of the wind pipe body and discharges air from the other end of the wind pipe body. And a rail extending in the tunnel excavation direction is provided, a plurality of moving members are provided on the rail, the telescopic wind pipes are suspended from the plurality of moving members, and the movement of the plurality of moving members In the ventilator in the tunnel in which the telescopic wind pipe can be expanded and contracted,
A belt member provided along an extending direction of the telescopic wind tube is interposed in each connection portion of the plurality of moving members and the telescopic wind tube ,
A plurality of ring members are attached to the wind tube main body apart from each other in the extending direction, and the belt member includes an upper belt and a lower belt sandwiching the plurality of ring members. A ventilation device in the tunnel. The ventilation apparatus for a tunnel according to claim 1, wherein the belt member is provided at an upper center position of the telescopic wind pipe. The ventilation device in a tunnel according to claim 1 or 2, wherein the upper belt and the lower belt alternately sandwich the plurality of ring members along the extending direction.

Images