JP4476914B2 - Air purification device in the tunnel - Google Patents

Description

  The present invention relates to an air purification device in a tunnel, and is particularly suitable for a tunnel having a small and medium cross section, and is a water scrubber type dust collector that treats dust generated during tunnel construction using hydraulic working equipment such as a sprayer or an excavator. It is about.

  In tunnel construction, harmful dust is generated due to work using excavators and sprayers, etc., polluting the air, especially in the vicinity of the face where the length of excavation is long, the ventilation is poor and the contaminated air is easily filled. . As a known method for removing dust from contaminated air containing such dust, (1) a filter-type dust collector that removes dust by passing the sucked contaminated air through a filter, and (2) a water shower on the sucked contaminated air There is a shower type dust collector that separates dust and the like by spraying, and (3) a water scrubber type dust collector that collects dust by bringing the sucked contaminated air into contact with the dust water in the scrubber tank.

  In these dust collectors, in the case of the filter type dust collector of (1), the filter and suction pump are clogged and the dust collection capacity is reduced, or the collected dust is in a powder state and post-treatment is not easy. In the case of the shower type dust collector of (2), it is necessary to sprinkle water in a state that is uniform and with many opportunities for contact, and that the equipment becomes large and expensive, and in the case of the water scrubber type dust collector of (3) However, there are disadvantages in each of them, such as difficulty in processing a large amount of contaminated air with high efficiency.

  Therefore, the applicant of the present invention aims to reduce the size of the dust collector and reduce the manufacturing cost by simplifying the structure, and to provide a dust collector with the ability to efficiently process a large amount of contaminated air. We filed an application for a “scrubber tank” (see Patent Document 1) and an application for an improved “water scrubber type dust collector” (see Patent Document 2), and made a proposal that can solve these problems. ing.

In addition, when using a conventional spraying machine that sprays spray material on the side of excavation with compressed air during tunnel construction, a large amount of dust is generated in the mine, and compressed air diffuses the dust. Therefore, it was necessary to perform dust treatment on a large amount of contaminated air. Therefore, by using a centrifugal hydraulic sprayer that uses centrifugal force instead of compressed air, the generation of dust during spraying and the amount of contaminated air that requires dust treatment are reduced as much as possible. (See Patent Document 3) of the name “Rotational projection spraying method”.
JP 2003-170017 A JP 2004-318992 A JP 2004-249197 A

  However, even in the scrubber tank of a dust collector with a small and simple structure, the sludge pump that discharges the contaminated liquid in the scrubber tank, the sludge liquid pipe that transports the discharged dirty liquid, and the contaminated liquid are reused. When a liquid processing facility for processing a clean liquid that can be used is necessary and the tunnel cross section is small, it is difficult to install these facilities in the tunnel tunnel. In addition, even when the tunnel cross section is relatively large, the amount of contaminated air that requires dust treatment increases, which increases the size of the equipment, making it difficult to install these equipment in tunnel tunnels with small and medium cross sections. Or occupies the passage and obstructs the work.

  On the other hand, when the dust collector is installed outside the tunnel mine, an underground piping facility is necessary for sucking contaminated air from the face and transferring it to the outside of the tunnel, and the pressure loss increases as the length of the underground pipe increases, resulting in ventilation. The air volume will decrease. In addition, since the dust collector is an exhaust system, dust is accumulated in the pipe as the ventilation air volume decreases, which causes further reduction in the air volume and is not efficient. For this reason, it is desirable to install the dust collector as close as possible to the face of the tunnel, but the face position moves as the excavation progresses, and the space in the tunnel is limited, so the equipment should be as small as possible. It is desirable to simplify it.

  On the other hand, when using a centrifugal hydraulic spraying machine that reduces the amount of dust generated during tunnel construction spraying, if the hydraulic unit that is the drive source is operated, the heat generated by the compression of the pump, the oil flowing through the device The temperature of the hydraulic oil rises due to heat generated by frictional resistance. The oil temperature is reduced by lowering the viscosity of the hydraulic oil, causing oil leakage at the seals and changing the output effect of the hydraulic work equipment, and increasing the underground temperature to worsen the work environment. Therefore, a cooling device for maintaining the proper range is required.

  It is necessary to connect a cooling fluid supply facility that sequentially supplies low-temperature cooling fluid to the cooling device, or use a large cooling device that can absorb thermal energy while maintaining the hydraulic oil at an appropriate temperature. Considering the movements associated with the work and the work space in the tunnel, the handling is complicated. Similarly, when other hydraulic working equipment such as a hydraulic excavator is used, a hydraulic unit, a cooling device, and a coolant supply facility are necessary, and handling thereof is not easy.

  Therefore, in the air purification device that processes dust generated in tunnel construction using hydraulic work equipment, the dust collection efficiency is improved compared to the case where the dust collector is installed outside the tunnel tunnel, and the entire equipment including the hydraulic work equipment and the dust collector is installed. It is an object of the present invention to make it easy to handle by downsizing and simplification, to be easily moved according to the progress of construction, and to suppress an increase in underground temperature.

  In order to solve the above-mentioned problems, as a first means, the present invention collects dust generated in tunnel construction using hydraulic working equipment in a scrubber rank with a suction duct, and clean air separated from dust with a blower. An air purification device in a tunnel for discharging, wherein a water scrubber type dust collector including the suction duct, a scrubber tank, and a blower is mounted on a movable traveling carriage, and the hydraulic working device is operated in the scrubber tank. Provided is an air purification device in a tunnel provided with a pipe for circulating oil to cool it.

  According to this, in tunnel construction where dust is generated with the use of hydraulic work equipment, the dust collection liquid in the scrubber tank of the dust collector is also used as the cooling liquid for cooling the hydraulic oil of the hydraulic work equipment. Therefore, it is possible to reduce the size of the entire equipment including the hydraulic working device and the dust collector by omitting the cooling device required for the operation.

  In addition, the temperature of the dust collection liquid used as the coolant gradually increases due to the heat radiation of the hydraulic oil, but by taking in a large amount of contaminated air as the dust collection liquid and contacting it, the heat is dissipated into the contaminated air and used as the coolant. Therefore, it is possible to simplify the overall equipment by omitting the coolant supply equipment of the cooling device, or to downsize the overall equipment by avoiding the enlargement of the cooling device. Furthermore, by suppressing the heat generated by the hydraulic working equipment and removing the clean air from which dust has been removed to the space away from the work position by the blower of the dust collector, the rise in the underground temperature near the face is suppressed. Can do.

  In addition, the pump for discharging the pollutant and the liquid supply equipment for supplying new dust collecting liquid as it is discharged are separated from the dust collector and simplified. In addition to being able to be brought in, it is possible to move the dust collector as the tunnel construction progresses, or to move it to a position where it does not interfere with other work, etc., making it easy to handle in a tunnel where the work space is limited.

  Furthermore, it is possible to suppress an increase in the underground temperature near the face by moving the system to the outside of the tunnel well and exchanging the dust collection liquid or releasing the heat absorbed and remaining in the dust collection liquid.

  Further, as a second means for solving the above-mentioned problems, the present invention provides an air purification apparatus as the first means, wherein the inside of the scrubber tank is divided into two tanks by a partition wall, An air purification apparatus in a tunnel provided with piping is provided.

  According to this, while the heat of the hydraulic oil absorbed by the coolant in one tank is dissipated to the dust collection liquid in the other tank through the partition wall, the collected cement adheres to the hydraulic oil cooling pipe. Therefore, it is possible to avoid a decrease in cooling capacity. In addition, if the coolant flows into the pipe when it is damaged, it may cause a failure of the hydraulic unit, etc., but if this is clean water, it can be repaired more easily than if it was a contaminated liquid. Can be done.

  Further, as a third means for solving the above-mentioned problems, the present invention provides an air purification apparatus as a first means, in a tunnel in which the hydraulic working device is mounted on the traveling carriage together with the water scrubber type dust collector. An air purification apparatus is provided.

  The hydraulic work equipment is connected with a water scrubber type dust collector used as a cooling device for the hydraulic oil and a hydraulic hose. According to this, when it moves because it is mounted on the same traveling carriage, Handling becomes easy.

  Further, as a fourth means for solving the above-mentioned problems, the present invention provides the air purification apparatus as the first means, wherein the hydraulic working device uses a spray material obtained by kneading a lining material and a quick setting agent. An air purification device in a tunnel, which is a rotary projection sprayer that rotates and projects by centrifugal force of an impeller rotated by a hydraulic motor.

  According to this, by using the sprayer with a small amount of dust generated during spraying work and the amount of contaminated air that needs to be removed, a dust collector equipped with a miniaturized scrubber tank can be It can be brought into the mine. Therefore, it is not necessary to provide a wind tube facility for collecting dust, which is necessary when installing outside the tunnel mine, and efficient dust treatment becomes possible.

  By using these means, it is possible to reduce the size of the air purification apparatus for processing dust generated by tunnel construction using the hydraulic work equipment by omitting the cooling equipment required for the hydraulic work equipment, and the cooling equipment. It is possible to simplify the hydraulic device by omitting the coolant supply equipment to be connected to the, or to reduce the size of the hydraulic device by avoiding the enlargement of the cooling device. In addition, by separating and simplifying the discharge pump and dust collection liquid supply facility from the dust collector, it is possible to bring the dust collector into the tunnel and facilitate handling in the tunnel where the work space is limited. . As a result, the dust collector can be brought into a tunnel mine having a small cross section, which is generally considered to be difficult, and more efficient dust treatment can be performed as compared with the case where it is installed outside the tunnel mine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram showing a state in which an air purifying device and a hydraulic working device according to the present invention are used in a small section tunnel. A rotary projection type used as a hydraulic work device near the face 2 of a tunnel 1 having a small cross section and rotating and projecting a spray material 3 in which a lining material and a quick setting agent are mixed by centrifugal force of an impeller that is rotated by a hydraulic motor. A sprayer 4 is used. Dust 5 generated in the tunnel construction using the rotary projection sprayer 4 is collected in the scrubber tank 7 by the suction duct 13, and the air purification device 6 in the tunnel that releases the clean air 24 separated from the dust 5 by the blower 14. The water scrubber type dust collector including the suction duct 13, the scrubber tank 7 and the blower 14 is mounted on the traveling carriage 8 movable on the rail in the tunnel, and the rotary projection type sprayer 4 is installed in the scrubber tank 7. A piping 11 for circulating and cooling the hydraulic oil 10 is provided.

  Dust collecting water 9 as a dust collecting liquid for collecting the dust 5 is stored on the lower layer side in the scrubber tank 7 of the air purification device 6, and the pipe 11 is piped so as to be immersed in the dust collecting water 9. ing.

  The rotary projection sprayer 4 is a spraying head that is mounted on the traveling carriage 8 and that rotationally projects the spraying material 3. The spraying head 15 is rotationally driven by the pressure oil of the hydraulic oil 10, and the spraying head. By driving a boom 16 as an arrangement means for arranging 15 at the spraying work position, a hydraulic oil tank 17 for storing the hydraulic oil 10, a hydraulic pump 18 as a pumping means for pumping the hydraulic oil 10, and the hydraulic pump 18. A hydraulic hose (not shown) for transferring the hydraulic oil 10 to the spraying head 15 and a quick setting agent supply device 19 for supplying a quick setting agent to be kneaded into the lining material in the spraying head 15 are provided.

  The lining material conveyed to the vicinity of the tunnel face 2 by the agitator car 21 which is a lining material conveyance vehicle is supplied to a concrete pump 22 which is a lining material pressure feeding means, and is supplied to a spraying head 15 via a material pressure feeding hose 23. The The hydraulic pump 18 pumps the hydraulic oil 10 to rotationally drive the hydraulic spray head 15, and kneads the lining material and the rapid setting agent supplied from the rapid setting agent supply device 19 to generate the spray material 3. Rotating and lining the inner wall of the tunnel 1. At this time, dust 5 is generated, and the air near the face 2 becomes contaminated air 12.

  The contaminated air 12 is sucked by a suction duct 13 which is fixed to the boom 16 and has a suction port disposed in the vicinity of the operation position for blowing, and is taken into the dust collection water 9 stored in the scrubber tank 7 and comes into contact with bubbles. Thus, the dust 5 is removed. The clean air 24 from which the dust 5 has been removed is sucked by the blower 14 and released to the outside of the air purification device 6.

  The hydraulic oil 10 whose oil temperature has risen due to the compression action of the hydraulic pump 18 and the frictional resistance flowing in the rotary projection type sprayer 4 circulates through the pipe 11 and radiates heat to the collected water 9 in the scrubber tank 7. The temperature of the dust-collecting water 9 as the cooling liquid gradually rises because no water supply equipment is provided, but heat is radiated to the contaminated air 12 by contact with a large amount of the contaminated air 12 sucked by the suction duct 13. The water temperature is kept at a certain temperature. The clean air 24 that has absorbed heat is diffused to a space away from the face by the blower 14, is sent to the vicinity of the face by the tunnel ventilation equipment, and is discharged along with the air flow toward the wellhead. Therefore, the temperature rise of the face can be suppressed.

  Note that the rotary projection sprayer 4 and the air purification device 6 mounted on the traveling carriage 8 are movable, and even if the position of the face fluctuates according to the excavation, the rotary projection sprayer 4 and the air purification device 6 can be moved. It can easily move to the face position, and can always perform efficient dust collection work with a short suction duct. Further, when the collected water 9 is polluted with dust and needs to be treated, the air purification device 6 is moved to a contaminated water treatment facility installed outside the tunnel mine, etc. Is taken out from a discharge port (not shown), separated into sludge and supernatant water that is stored in a contaminated water treatment facility and settled, and replenished with supernatant water that can be reused.

  Further, even when the temperature of the dust collection water 9 is still high due to the heat radiation to the contaminated air, the rotary projection sprayer 4 and the air purification device 6 are moved out of the tunnel mine, and the heat remaining in the dust collection water 9 Is released in an open space, or the dust collecting water 9 is discharged and replenished with new supernatant water to suppress the temperature rise of the face.

  In the illustrated embodiment, the rotary projection sprayer 4 and the air purification device 6 are mounted on one traveling carriage 8, but the boom 16, the spray head 15, the hydraulic oil tank 17, the scrubber tank 7, May be mounted on separate movable traveling carts, which may be towed or self-propelled. Moreover, although the traveling carriage is a wheel type that can move on the rail, it may be a wheel type or a crawler type that does not require a rail. When the hydraulic oil tank 17 and the scrubber tank 7 are mounted on different moving carriages, the connecting portion of the pipe 11 to the scrubber tank 7 near the start point and end point is piped using a flexible hydraulic hose. do it. The same applies when the hydraulic working device is other than a spraying machine such as a hydraulic excavator.

  FIG. 2 is a longitudinal sectional view showing an essential part of a water scrubber type dust collector, which is an embodiment of the air purifier according to the present invention. The scrubber tank 7 stores the collected water 9 on the lower layer side and maintains a constant water level W.V. An air flow region 30 is provided on the upper layer side of L.

  The piping 11 of the hydraulic oil 10 is piped so as to be immersed in the dust collection water 9 with the hydraulic oil tank 17 as a starting point, and is circulated with the hydraulic oil tank 17 as an end point. The piping 11 in the dust collection water 9 is formed in a shape that increases the heat radiation area in order to efficiently reduce the oil temperature of the hydraulic oil 10 that circulates in the piping. A pump (not shown) is installed in the pipe 11 outside the scrubber tank 7 to circulate the hydraulic oil 10, and the hydraulic oil 10 whose oil temperature has risen releases heat due to a temperature difference with the surrounding dust collection water 9. And cooled.

  The air flow region 30 of the scrubber tank 7 is provided with first and second flow path guide plates 31 and 32 that define an air flow path. A slit-shaped communication path 33 (33A, 33B) is formed above L by the inner end side of each flow path guide plate 31, 32. The two flow path guide plates 31, 32 are arranged such that the first flow path guide plate 31 starts from the input side and ends toward the end of the central portion of the scrubber tank 7. The second flow path guide plate 32 extends from the start end of the central part of the scrubber tank 7 toward the end of the output side, and the water level W. The upper part of L extends upward in an inclined manner and intersects alternately.

  Accordingly, the first air flow path 30A having a small volume is provided below the first flow path guide plate 31, and the second air having a larger volume is provided below the second flow path guide plate 32. A flow path 30B is formed, and a third air flow path 30C having a larger volume is formed above the two flow path guide plates 31 and 32, and the space between the air flow paths 30A, 30B, and 30C is narrow. It communicates via the gap-shaped communication path 33 (33A, 33B).

  In the collected water 9, the water level W.V. The tip of the input cylinder 34 protrudes below the first flow path guide plate 31 in a state where it is submerged slightly from L. In the scrubber tank 7, a first dust filter 36 that also serves as a wave-dissipating plate is provided below the middle portion of the first flow path guide plate 31, and a second dust guide filter 36 is provided above the second flow path guide plate 32. Two dust removal filters 37 are provided.

  When the scrubber tank 7 sucks the clean air 24 in the air flow region 30 with the blower 14, the scrubber tank 7 gradually becomes in a negative pressure state, and the water level of the dust collection water 9 </ b> B on the second air flow path 30 </ b> B side rises. The level of the dust collection water 9A on the side of the air flow path 30A is lowered, and when the level of the dust collection water 9A is lowered, the contaminated air 12 is sequentially sent from the tunnel 1 into the scrubber tank 7 through the suction duct 13 and the input cylinder 34. .

  Since the contaminated air 12 comes into contact with the dust-collecting water and becomes a bubble state, dust and the like are collected in the dust-collecting water 9, and are sequentially deposited and deposited as sludge on the bottom of the dust-collecting water 9A. The polluted water containing is discharged from a discharge port (not shown) and purified to be reused in the polluted water treatment facility.

  On the other hand, the air from which dust or the like has been removed floats up the collected water 9A, is taken into the first air flow path 30A as clean air 24, and sequentially flows to the second air flow path 30B side through the communication path 33A. After that, it flows to the third air flow path 30C side through the communication path 33B, is transferred to the blower 14 side connected to the output cylinder 35, and is discharged into the tunnel as clean air 24.

  Further, the clean air 24 taken into the first air flow path 30A contains contaminants such as dust and moisture remaining without being removed, but the two flow path guide plates 31, 32 are included. As a result, the flow rate of the flowing air is increased and water droplets containing dust adhering to the lower surfaces of the flow path guide plates 31 and 32 and the ceiling of the scrubber tank 7 while flowing in the air flow region 30 are two flow paths. It flows down along the inclined surfaces of the guide plates 31 and 32 and drops into the dust collection water 9 to be collected.

  By adopting a configuration in which a first dust filter 36 and a second dust filter 37 are provided in the middle of the air flow region 30, the function of removing contaminants from the contaminated air 12 is further improved.

  The first dust filter 36 has an upper side protruding in the middle of the first air flow path 30A and a lower side connected to the bottom surface of the input side dust collecting water 9A. It extends above and below L, and an opening is provided at a portion intersecting with the pipe 11 so that there is no gap with the pipe 11. Removes contaminants flowing from the first air flow path 30A to the second air flow path 30B on the downstream side, and suppresses and traps the turbulent flow caused by the waves generated on the upstream side so that it does not flow downstream. The dust and the like that have been scraped off are automatically washed off by the wave of scraping and deposited on the bottom of the scrubber tank 7.

  The second dust filter 37 is provided on the upper end side of the flow path guide plate 32 with respect to the third air flow path 30C, and captures and prevents contaminants remaining in the clean air 24 flowing downstream. Then, clean air 24 having a low dust concentration is transferred to the blower 14 side.

In the illustrated embodiment, both the first and second dust removal filters 36 and 37 are provided. However, an embodiment in which only one dust removal filter is provided or an embodiment in which no dust removal filter is provided may be employed. It is possible, and by providing either one of the two dust removal filters 36, 37 or the dust removal filters 36, 37, there are significant differences in the dust collection effect, the air cleaning effect, and other points compared to the case where no dust removal filter is provided. It has been confirmed.

  FIG. 3 is a longitudinal sectional view showing a main part of a water scrubber type dust collector, which is another embodiment of the air purification apparatus of the present invention. A partition wall 38 is provided inside the scrubber tank 7, and the collected dust water 9 stored in the scrubber tank 7 is divided into upper and lower dust collection waters 9A and 9B and a lower tank dust collection water 9C. Yes. The dust removal filter 36 protrudes above the partition wall 38 and separates the dust collection waters 9A and 9B. A pipe 11 is installed in the dust collection water 9C below the partition wall 38.

  The heat of the hydraulic oil 10 flowing through the pipe 11 is first released to the dust collection water 9C, and the dust collection water 9C whose temperature around the pipe rises rises in the dust collection water 9C and passes through the partition wall 38. Heat is released to the collected water 9A and 9B. Therefore, the partition wall 38 is preferably made of a material having high thermal conductivity, and is made of a water-impermeable material so that the dust collection water 9B, 9C is not mixed into the dust collection water 9A. For example, an iron plate may be used as the partition wall 38, but it is preferable to use a copper plate or an aluminum plate having higher thermal conductivity.

  The contaminated air flowing in from the input cylinder 34 passes through the dust collection water 9A, 9B and the air flow path 30, and flows out to the output cylinder 35. Since the collected water 9C does not come into contact with the contaminated air, it is not polluted by dust and is always kept clean. Therefore, even when the pipe 11 is damaged, it is possible to avoid the failure of the hydraulic unit due to the inflow of polluted water into the pipe. Also, the collected dust collected on the pipe 11 adheres to the cooling effect. Can also be avoided.

  Note that the present invention is not limited to the embodiment in which the scrubber tank 7 is divided into upper and lower parts as shown in FIG. 3. For example, the scrubber tank 7 is installed in the horizontal direction by installing the partition wall 38 in the vertical direction or the oblique direction. It is also possible to take the form of dividing into two tanks.

  FIG. 4 is a cross-sectional view showing a rotary projection sprayer used as the hydraulic working device of FIG. The rotary projection type sprayer 4 includes a material introduction unit 4A, a stirring and mixing unit 4B, a rotary projection unit 4C, and a rotation drive unit 4D.

  In the material introduction section 4A, a large-diameter first introduction pipe 42 for introducing a lining material and a small-diameter second introduction pipe 43 for introducing a quick setting agent are arranged concentrically, and a concrete pump is provided in the first introduction pipe 42. The lining material is pumped from the quick setting agent supply device 19 to the second introduction pipe 43 through the material pressure feeding hose 23 connected to the pump 22. In the stirring and mixing unit 4B, a quick setting agent is added to the lining material introduced into the inner peripheral surface of the start end side, and the spray material 3 is kneaded by the plurality of stirring blades 44 while flowing toward the end side.

  FIG. 5 is a V cross-sectional view of FIG. The rotary projection unit 4C is equipped with a projection impeller 46 equipped with a plurality of blades 45, and a plurality of guide rollers 48 pivotally attached to a direction control plate 47 are arranged on the outer periphery of the projection impeller 46. An endless belt 50 is wound between the impeller 46 and each guide roller 48 in such a manner that the projection port 49 is opened in the projection direction D.

  The spray material 3 that is sequentially transferred into the projection impeller 46 is rotated and projected by the centrifugal force from the projection port 49 to the projection direction D so that it is pushed out by each blade 45 when the projection impeller 46 is driven to rotate. Is done. At this time, when the direction control plate 47 is swung and rotated at a predetermined angle, the projection port 49 of the endless belt 50 wound around the guide roller 48 is set as desired, and the projection direction D can be variably adjusted to a desired angle. it can.

  The rotation driving unit 4D requires a driving unit that rotates the stirring blade 44 at a high speed, a driving unit that rotates the projection impeller 46 at a high speed, a driving unit that swings and rotates the direction control plate 47, and the like. Are connected to a hydraulic motor through power transmission means such as pulleys and V-belts. In this embodiment, the configuration of the rotation drive unit is simplified by connecting the stirring blade 44 and the projection impeller 46, performing high-speed rotation drive by the second motor M2 via the power transmission means, and sharing the same. .

It is a conceptual diagram which shows a mode that the air purification apparatus by this invention and a hydraulic working apparatus are used in a small cross-section tunnel. It is one Embodiment of the air purification apparatus by this invention, Comprising: It is a longitudinal cross-sectional view which shows the principal part of a water scrubber type dust collector. It is other embodiment of the air purification apparatus by this invention, Comprising: It is a longitudinal cross-sectional view which shows the principal part of a water scrubber type dust collector. It is sectional drawing which shows the rotary projection type sprayer used as a hydraulic working apparatus of FIG. It is IV sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tunnel 2 Face 3 Spray material 4 Rotation projection type spray machine 4A Material introduction part 4B Stirring mixing part 4C Rotation projection part 4D Rotation drive part 5 Dust 6 Air purifier 7 Scrubber tank 8 Traveling carriage 9 Dust collection water 10 Hydraulic oil 11 Piping 12 Contaminated air 13 Suction duct 14 Blower 15 Blowing head 16 Boom 17 Hydraulic oil tank 18 Hydraulic pump 19 Quick setting agent supply device 21 Agitator car 22 Concrete pump 23 Material pumping hose 24 Clean air 30 Air flow area 30A First air Flow path 30B Second air flow path 30C Third air flow path 31 First flow path guide plate 32 Second flow path guide plate 33 Communication path 34 Input cylinder 35 Output cylinder 36 First dust filter 37 Second Dust filter 38 Bulkhead 42 First introduction pipe 43 Second introduction pipe 44 Stirring blade 45 Blade plate 46 Projection Impeller 47 direction control plate 48 guide rollers 49 projection opening 50 endless belt D projection direction

Claims (4)

  An air purification device in a tunnel that collects dust generated in tunnel construction using hydraulic work equipment in a scrubber tank with a suction duct and discharges clean air separated from the dust with a blower, the suction duct and the scrubber tank A tunnel having a water scrubber type dust collector including a fan and a blower mounted on a movable carriage and provided with a pipe for circulating and cooling the hydraulic oil of the hydraulic working equipment in the scrubber tank. Air purification equipment.   2. The air purifier in a tunnel according to claim 1, wherein the inside of the scrubber tank is divided into two tanks by a partition wall, and the pipe is provided in one tank.   The air purification apparatus in a tunnel according to claim 1, wherein the hydraulic working device is mounted on the traveling carriage together with the water scrubber type dust collector.   The said hydraulic working apparatus is a rotary projection type spraying machine which rotates and projects the spraying material which knead | mixed the lining material and the quick setting agent with the centrifugal force of the impeller rotated by a hydraulic motor. The air purification apparatus in the tunnel as described in 2.

Images