JP3990615B2 - Telescopic wind pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a telescopic wind pipe used in a ventilation device installed in a tunnel, for example.
[0002]
[Prior art]
When constructing large underground structures or excavating mountain tunnels, a large amount of dust is generated along with the excavation work. If such dust remains in the tunnel, it may harm the health of workers such as pneumoconiosis. In particular, the dust in the work area near the face (hereinafter referred to as the “face work area”) is transferred to the outside of the tunnel. Ventilation devices are known for exhausting. In such a ventilator, a flexible telescopic telescopic wind tube is used so that it becomes easy to change the introduction position of air containing dust in accordance with the progress of tunnel excavation and the like. ing. And, for example, by providing a blower at the rear end of the wind pipe and flowing air from the front end to the rear end of the telescopic wind pipe, air containing dust is introduced from the front end to Ventilation is performed to remove dust.
[0003]
In such a telescopic wind tube, the degree of expansion and contraction of the telescopic wind tube is changed according to the distance between the rear end portion of the telescopic wind tube provided with a blower, a dust collector, and the like and the front end portion that performs actual suction. Specifically, when the working area for removing dust is close to the installation location of a dust collector or the like, the telescopic wind tube is contracted and used. Conversely, when the face work area is far from the place where the dust collector or the like is installed, the telescopic wind pipe is extended and used.
[0004]
[Problems to be solved by the invention]
By the way, since this kind of telescopic wind tube has flexibility, the magnitude of the internal pressure loss changes depending on the degree of expansion and contraction. Specifically, when the telescopic wind tube is extended and used, the pressure loss is relatively small. Therefore, when ventilation is performed by flowing air through the telescopic wind tube, ventilation according to the flow rate of the flowed air is performed. Ventilation with full capacity is possible.
[0005]
However, when the telescopic wind tube is contracted and used, the pressure loss in the telescopic wind tube increases. For this reason, there is a problem that even if air is ventilated through the telescopic wind pipe, ventilation is forced to be performed in a state in which the ventilation ability according to the flow rate of the air that has flowed cannot be sufficiently exhibited.
[0006]
Accordingly, an object of the present invention is to provide a telescopic wind that can sufficiently exhibit the ventilation capacity according to the flow rate of the flowed air, even when the telescopic wind tube is contracted, when performing ventilation using the telescopic wind tube. To provide a tube.
[0007]
[Means for Solving the Problems]
The telescopic wind pipe according to the present invention that has solved the above problems has a flexible wind pipe body that has flexibility, and in the telescopic wind pipe that introduces air from one end of the wind pipe body through the wind pipe body, A plurality of non-deformable inner tubes are disposed inside the wind tube main body so as to be spaced apart from each other in the direction of expansion and contraction of the wind tube main body.
[0008]
In the telescopic wind pipe according to the present invention, a non-deformable inner pipe is provided in the wind pipe main body so as to be spaced apart in the telescopic direction of the wind pipe main body. For this reason, when the wind tube body contracts, a state in which these inner tubes are continuous is formed, and the pressure loss in the wind tube body can be reduced. Therefore, the ventilation capability when air is flowed can be sufficiently exerted.
[0009]
Further, it is preferable that a plurality of shape retaining members that retain the shape of the opening of the wind tube main body are attached to the telescopic wind tube while being spaced apart from each other in the expansion and contraction direction of the wind tube main body.
[0010]
By providing such a shape-retaining member, even when air is sucked from the rear end portion of the telescopic wind tube, the telescopic wind tube can retain the shape of the opening. For this reason, even if the air is sucked from the rear end portion of the wind tube main body, it is possible to prevent the telescopic wind tube from being closed and closed. Can be placed on the side.
[0011]
Furthermore, it is preferable that a plurality of inner pipes are arranged at equal intervals.
[0012]
Thus, when the plurality of inner pipes are arranged at equal intervals, the contraction ratio can be equalized when the wind pipe body is expanded and contracted. Therefore, the movement at the time of expanding and contracting the wind pipe body can be made smooth.
[0013]
Further, the inner tube can be made of metal or resin. As the non-deformable inner tube, a metal or a resin can be suitably used. Of these, metal ones are generally superior in terms of high rigidity, and resin ones are generally superior in that they are lightweight.
[0014]
Furthermore, the wind tube body is formed by connecting a plurality of short wind tubes, and a split inner tube that forms an inner tube is provided at an end of the short wind tube, and the short wind tubes are connected to each other. Moreover, it can be set as the aspect by which the wind pipe main body and the inner pipe are formed by connecting inner pipes.
[0015]
Thus, by connecting the short wind tube to form the wind tube main body and providing the inner tube at the short part of the short wind tube, the installation of the wind tube main body can be facilitated. Further, even when the entire length of the wind pipe body is adjusted according to the situation at the construction site or the like, the adjustment can be easily performed.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol shall be used for the same element and the overlapping description is abbreviate | omitted.
[0017]
1A and 1B are views showing a telescopic wind tube according to the present invention, wherein FIG. 1A is a side view showing a state where the telescopic wind tube is extended, and FIG. 1B is a side view showing a state where the telescopic wind tube is contracted. . FIG. 2 is an enlarged view of the telescopic wind tube according to the present invention in a state in which the wind tube body is removed, (a) is an enlarged side view showing a state in which the telescopic wind tube is extended, and (b) is an illustration of the telescopic wind tube. It is an enlarged side view which shows the contracted state. FIG. 3 is an enlarged view of the telescopic wind tube, (a) is an enlarged side view of the state in which the telescopic wind tube is expanded, and (b) is an enlarged side view of the state in which the telescopic wind tube is contracted. In FIG. 3, the inner pipes arranged at both ends are drawn so as to be exposed from the wind pipe body, but in reality, they are housed inside the wind pipe body.
[0018]
As shown in FIG. 1, the telescopic wind tube 1 according to this embodiment includes a wind tube body 2. The wind pipe body 2 is made of, for example, vinyl, has flexibility, and can be expanded and contracted. The full length of the telescopic wind tube 1 is expanded and contracted by the expansion and contraction of the wind tube body 2.
[0019]
As shown in FIG. 2, a plurality of hollow inner tubes 3 that are non-deformable are provided inside the wind tube main body 2. The inner tube 3 is made of, for example, metal or resin, has a short cylindrical shape, and has a strength that does not deform even when air flows into the wind tube body 2. The inner pipe 3 is arranged at regular intervals along the extending direction of the wind pipe body 2. For this reason, in any case where the wind pipe body 2 is expanded or contracted, the length of the portion of the wind pipe body 2 between the adjacent inner pipes 3, 3 is equal to that of the plurality of inner pipes 3, 3,. Almost evenly distributed between. The width of the inner tube 3 along the expansion / contraction direction of the wind tube body 2 is about one third of the distance between the adjacent inner tubes 3 and 3 when the wind tube body 2 is fully extended. Therefore, when the wind pipe body 2 is completely contracted and all the adjacent inner pipes 3 and 3 are in contact with each other, the length of the wind pipe body 2 at that time is as follows. It becomes about one quarter of the length of.
[0020]
The width of the inner tube 3 relative to the width between the adjacent inner tubes 3 and 3 when the wind tube main body 2 is fully extended can be appropriately set depending on the material, the overall length, etc. of the wind tube main body 2. However, it is preferable to set it to about 1/2 to 1/5, for example. This is because if the length is longer than 1/2, the length that can be contracted is shortened, and if it is shorter than 1/5, the reduction in pressure loss when the wind tube body 2 contracts is reduced. However, it is not limited to this range, and can be set to various lengths.
[0021]
A bell mouth 4 is attached to the tip of the wind tube body 2. Dust generated from the face work area in the vicinity of the face K in the tunnel T is introduced into the wind pipe body 2 through the bell mouth 4 together with air. Further, as shown in FIG. 3, a plurality of metal or resin ring members 5, 5... That are the shape retaining members of the present invention are attached to the wind pipe body 2. The plurality of ring members 5, 5... Are attached at regular intervals in the expansion / contraction direction (extending direction) of the wind tube body 2. The ring member 5 has non-deformability (hardness), and is fixed to the surface of the wind tube main body 2 from the surface side by an adhesive tape (not shown). In this way, the opening shape is maintained and the opening shape is maintained so that the wind pipe body 2 is not crushed and the passage is not blocked. Moreover, deterioration of the ring member 5 and the wind pipe main body 2 is prevented by the adhesive tape.
[0022]
A dust collector 6 is attached to the rear end of the wind pipe body 2. The dust collector 6 includes a blower (not shown). By driving the blower, the dust collector 6 generates a suction force so that air flows in the wind tube body 2 from the front end portion of the wind tube body 2 to the rear end side. It has become. Then, dust generated in the vicinity of the face work area via the bell mouth 4 is sucked together with air and sent to the dust collector 6 via the wind pipe body 2. The dust collector 6 collects the sent dust. The dust collector 6 is mounted on the vehicle 7, and the dust collector 6 can be moved by moving the vehicle 7. The dust collector 6 and the telescopic wind tube 1 constitute a ventilation device in the tunnel.
[0023]
In addition, an expansion / contraction driving device 8 is provided above the wind pipe body 2. The telescopic drive device 8 includes a first rail 9 provided obliquely above the tunnel T and a second rail provided below the first rail 9. A ring support member 11 and a roller member 12 are provided on the first rail 9. As shown in FIG. 3, a ring member 5 is suspended from the ring support member 11. The ring support member 11 is provided with a rotation prevention mechanism (not shown) to prevent the ring support member 11 and the ring member 5 from rotating around the vertical axis. The ring support member 11 is provided with all the ring members 5, and the ring member 5 includes those that are suspended from the ring support member 11 and those that are not suspended from the ring support member 11. The number of ring members 5 suspended from the ring support member 11 is about half of the total number of ring members 5. Thus, by preventing about half of the ring members 5 from being rotated by the ring support member 11, it is possible to prevent kinking of the wind tube body 2.
[0024]
Although a certain number of the ring support members 11 are provided side by side, the ring support members 11 are spaced apart from each other in the extending direction of the wind tube main body 2 at predetermined intervals, and the roller members 12 are provided at appropriate intervals therebetween. The roller member 12 is driven by a driving device (not shown) and has a roller placed on the second rail 10, and the roller travels on the second rail 10, so that the wind tube main body 2 is moved as a whole. Can be expanded and contracted. Since these roller members 12 are disposed at equal intervals with a predetermined interval, when the wind tube main body 2 is contracted, the roller member 12 contracts uniformly. An inner tube 3 is attached to a part of the roller member 12. For this reason, when the wind pipe body 2 contracts, the plurality of inner pipes 3 move so that their intervals are maintained at regular intervals.
[0025]
The operation of the telescopic wind tube 1 according to the present invention having the above configuration will be described.
[0026]
When excavating the tunnel T, a large amount of dust or the like is generated in the face work area in the vicinity of the face K. Ventilation is performed by sucking and removing the dust or the like by applying an intake pressure through the telescopic wind tube 1 by a blower provided in the dust collector 6. Now, when excavation of the tunnel T proceeds and the face K is at a position far from the vehicle 7, as shown in FIG. 1A, the wind tube body 2 in the telescopic wind tube 1 is used in an extended state.
[0027]
Here, since the wind pipe main body 2 is shape-retained by the plurality of ring members 5, closing due to negative pressure is prevented, and the opening shape can be maintained. Further, when the wind tube main body 2 is in the extended state, the surface of the wind tube main body 2 is in a tensioned state. Therefore, when air is sucked by the blower of the dust collector 6, the pressure loss may be reduced. it can.
[0028]
Subsequently, when the excavation of the tunnel T progresses and the distal end portion of the telescopic wind tube 1 moves away from the face work area, the vehicle 7 is moved in the direction of the face K. Then, in order to reduce the movement of the vehicle 7 as much as possible, the vehicle 7 is brought close to the face K, and ventilation is performed with the telescopic wind tube 1 contracted as shown in FIG. And as excavation of the tunnel T progresses, the telescopic wind tube 1 is gradually extended so that the vehicle 7 is ventilated without moving. Here, when the wind tube main body 2 is in a contracted state, the wind tube main body 2 is in a slack state. Therefore, if there is no inner tube 3, the pressure loss in the wind tube main body 2 becomes very large. As a result, the ventilation efficiency is low.
[0029]
In this regard, a plurality of inner pipes 3, 3... Are provided in the wind pipe main body 2 according to the present embodiment, and the wind pipe main body 2 is provided as shown in FIGS. 2 (b) and 3 (b). When the is contracted, the ends of the adjacent inner tubes 3 and 3 come close to or come into contact with each other. Since the inner tube 3 is non-deformable and has a cylindrical shape, the air sucked by the suction force of the blower of the dust collector 6 when the adjacent inner tubes 3 and 3 are close to or in contact with each other, It passes through the inner tube 3. For this reason, since reduction of pressure loss can be prevented, ventilation efficiency can be made favorable.
[0030]
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, in the above embodiment, as shown in FIG. 4, the inner tube 3 is inserted into the wind tube body 2 to form the telescopic wind tube 1. However, for example, the embodiment shown in FIG. 5 may be adopted. In FIG. 5, the telescopic wind tube is formed by a plurality of short wind tubes 21, and only the connection portion between the adjacent short wind tubes 21 and 21 is shown. Divided inner tubes 22 and 22 are attached to both ends of the short wind tubes 21 and 21, respectively. The divided inner tube 22 has a shape obtained by cutting the inner tube 3 shown in the above embodiment at the center in the longitudinal direction. By connecting the two divided inner tubes 22 and 22, the inner tube in the above embodiment. 3 is formed. A fastener member 23 is disposed between the short wind tubes 21 and 21. Thus, the telescopic wind tube can also be formed by attaching the divided inner tube 22 integrally to the inner end of the short wind tube 21 and connecting the short wind tube 21 continuously.
[0031]
Moreover, in the said embodiment, although it is set as the aspect which inserts the inner tube | pipe 3 in the inside of the wind tube main body 2, for example, what connected the short wind tube continuously as a wind tube main body is used, and connection of a short wind tube is used. It is also possible to adopt an aspect in which the inner pipe is disposed in the part. In this case, it is necessary to seal the connecting portion between the inner pipe and the short wind pipe with a sealing material or the like. However, in consideration of assembling the telescopic wind pipe in the field, this aspect is the aspect shown in the above embodiment. Easier to assemble.
[0032]
【The invention's effect】
As described above, according to the present invention, when ventilating using the telescopic wind tube, even when the telescopic wind tube is contracted, the ventilation ability according to the flow rate of the flowed air can be sufficiently exhibited. A telescopic wind tube can be provided.
[Brief description of the drawings]
1A and 1B are views showing a telescopic wind tube according to the present invention, in which FIG. 1A is a side view showing a state where the telescopic wind tube is extended, and FIG. 1B is a side view showing a state where the telescopic wind tube is contracted. .
FIG. 2 is an enlarged view of the telescopic wind tube according to the present invention in a state where the wind tube body is removed, (a) is an enlarged side view showing a state where the telescopic wind tube is extended, and (b) is an expanded wind tube. It is an enlarged side view which shows the contracted state.
FIG. 3 is an enlarged view of the telescopic wind tube, (a) is an enlarged side view of the state in which the telescopic wind tube is extended, and (b) is an enlarged side view of the state in which the telescopic wind tube is contracted.
FIG. 4 is a side view showing a state in which the inner pipe is inserted into the wind pipe main body according to the embodiment of the present invention.
FIG. 5 is a side view showing a state in which an end of a short wind pipe having an inner pipe attached to the end is connected.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Telescopic wind pipe, 2 ... Wind pipe main body, 3 ... Inner pipe, 4 ... Bell mouth, 5 ... Ring member, 6 ... Dust collector, 7 ... Vehicle, 8 ... Telescopic drive device, 9 ... 1st rail, 10 ... 1st 2 rails, 11 ... ring support member, 12 ... roller member, 21 ... short wind tube, 22 ... split inner tube, 23 ... fastener member, K ... face, T ... tunnel.

Claims (5)

A telescopic wind tube having a flexible wind tube body having flexibility, and introducing air from one end of the wind tube body through the wind tube body,
A telescopic wind tube, wherein a plurality of non-deformable inner tubes are disposed in the wind tube main body so as to be spaced apart from each other in the direction of expansion and contraction of the wind tube main body. The telescopic wind tube according to claim 1, wherein a plurality of shape retaining members that retain the shape of the opening of the wind tube main body are attached to the telescopic wind tube at a distance from each other in the expansion / contraction direction of the wind tube main body. The telescopic wind pipe according to claim 1 or 2, wherein the plurality of inner pipes are arranged at equal intervals. The telescopic wind tube according to any one of claims 1 to 3, wherein the inner tube is made of metal or resin. The wind pipe body is formed by connecting a plurality of short wind pipes,
A split inner pipe that forms the inner pipe is provided at an end of the short wind pipe,
5. The wind pipe main body and the inner pipe are formed by connecting the short wind pipes to each other and connecting the inner pipes to each other. 5. Telescopic wind tube.

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