JP2010227803A - Suction device and suction vehicle with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction device and a suction vehicle, sufficiently removing fine powder of coal ash and activated carbon, etc., when sucking and recovering it. <P>SOLUTION: The suction device includes: a receiver tank for recovering a recovery object by the suction negative pressure of a blower; a cyclone type dust collector connected to the receiver tank; and a bubble type dust collector 23 comprising piping 31 connected to the downstream side of the cyclone type dust collector and provided with many vent holes 34 formed at the distal end part and a tank 30 storing water in the inside, where many vent holes 34 at the distal end part of the piping 31 are immersed in the water. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a suction device that sucks and collects a light and fine collection object such as coal ash, activated carbon, sand, and cement using negative pressure, and a suction wheel equipped with the suction device.

  2. Description of the Related Art Conventionally, a suction recovery device that suctions and recovers a recovery target such as sludge and muddy water using negative pressure is known. For example, Patent Document 1 discloses a suction hose inserted in a collection place for a collection target, a receiver tank connected to the suction hose and collecting the collection target, and a first cyclone dust collector connected to the receiver tank. And a suction device and a suction wheel including a blower connected to a first cyclone dust collector and a second cyclone dust collector connected to a downstream side of the blower are disclosed.

  In Patent Document 2, a storage tank is provided at the rear part of the vehicle body frame, a cyclone and a water task rubber connected via a suction pipe are provided on the front side of the storage tank, and a roots blower is provided on the front side thereof. A suction wheel is disclosed. In this suction vehicle, dust and the like are removed from the air in the storage tank sucked by the roots blower by a cyclone dust collector, and finer dust and the like are removed from the air that has passed through the cyclone dust collector by a water task rubber.

JP 2007-92481 A JP 2007-255095 A

  By the way, when the collection target is coal ash, activated carbon, sand, cement, or the like, the collection target is a powder (fine powder) having a light specific gravity, and thus the cyclone dust collector cannot sufficiently collect the powder. In addition, as described in Patent Document 2, there are those that remove finer dust and the like from the air that has passed through the cyclone type dust collector by a wet water task rubber, but simply touch the dust with water, A sufficient dust removal effect is not obtained.

  Therefore, an object of the present invention is to provide a suction device and a suction wheel that can sufficiently remove fine powder such as coal ash and activated carbon when sucked and collected.

  The suction device of the present invention is connected to a receiver tank that collects an object to be collected by the suction negative pressure of the blower, a cyclone dust collector connected to the receiver tank, a downstream side of the cyclone dust collector, and a large number of passages at the tip. A bubble dust collector composed of a pipe in which pores are formed, a tank in which water is stored and a large number of ventilation holes at the tip of the pipe are immersed in water, and a blower connected to the bubble dust collector; And a dust collector connected to the blower.

  According to the suction device of the present invention, the fine powder that could not be removed by the cyclone dust collector is sent to the bubble dust collector through the piping together with the suction air of the blower, and sent to the water stored in the tank. At this time, bubbles are generated in the water by suction air being sent out from a large number of air holes formed at the tip of the pipe. The fine powder contained in the suction air is captured by the bubbles, and the fine powder is removed from the suction air.

  Here, it is desirable that the pipe is a pipe in which a part of the numerous vent holes at the tip is exposed on the water surface. By exposing some of the vents at the tip to the surface of the water, a part of the suction air is sent into the tank without passing through the water, and the momentum of the suction air sent into the water is suppressed and suction is performed. It is possible to prevent water from being blown up by air.

  Alternatively, the piping may be such that all of the numerous vent holes at the tip end are immersed in water. When all of the numerous vent holes at the pipe tip are immersed in water, the water is vigorously stirred by the suction air sent from the numerous vent holes, so that the fine powder and water are further entangled.

  Moreover, it is desirable that the bubble dust collector further includes a shade that covers the upper surface of the water at the tip of the pipe. As a result, bubbles generated by the suction air sent out from a large number of ventilation holes at the tip of the pipe remain on the water surface at the tip of the pipe, and the fine powder contained in the suction air and the bubbles are efficiently brought into contact with each other. It becomes possible to remove more. In addition, when some of the many vent holes at the tip are exposed on the water surface, the suction air sent from the portion exposed on the water surface is directed toward the water surface by the shade, thereby The fine powder and air bubbles contained in the air can be efficiently brought into contact with each other, and more fine powder can be removed from the suction air.

  In addition, it is desirable that the pipe has a tip end surface that is opened downward in water and has a large number of air holes formed in the peripheral wall surface of the tip portion. Since the tip surface of the tip of the pipe is opened downward in the water, the fine powder contained in the suction air sent through the pipe is sent to the water from the tip surface opened in the water. It is possible to prevent a large number of ventilation holes on the peripheral wall of the clogging from being clogged with fine powder. At this time, a part of the suction air is sent out from a large number of vent holes on the peripheral wall surface of the tip, thereby generating the above-mentioned bubbles in the water, and the fine powder contained in the suction air is captured by the bubbles, and from the suction air Fine powder is removed.

(1) A receiver tank that collects an object to be collected by the suction negative pressure of the blower, a cyclone dust collector connected to the receiver tank, and a downstream side of the cyclone dust collector, and a large number of vent holes are formed at the tip. Connected to a blower connected to a bubble dust collector, a blower connected to a bubble dust collector, and a tank in which water is stored inside and a large number of ventilation holes at the tip of the pipe are immersed in the water Since the fine dust that could not be removed by the cyclone dust collector is captured by bubbles generated in the water in the bubble dust collector, the collection object containing fine powder such as activated carbon is sucked and collected. In addition, the fine powder can be sufficiently removed.

(2) Since the piping is such that some of the vents at the tip are exposed on the surface of the water, part of the suction air is sent into the tank without passing through the water and sent into the water. This suppresses the momentum of the suction air and prevents the water from being blown up by the suction air. Thereby, it can prevent that a foreign material turns to a downstream blower, and can prevent failure of a blower.

(3) Since the pipe has all of the numerous vent holes at the tip end immersed in water, the water is vigorously stirred by the suction air sent from the numerous vent holes. Can be entangled with each other, and further dust collection effect can be expected.

(4) Since the bubble dust collector further includes a shade covering the upper surface of the pipe, the bubbles generated by the suction air sent out from a large number of air holes at the pipe tip are removed from the pipe tip. The fine powder contained in the suction air and the bubbles are efficiently brought into contact with each other by staying on the water surface, and more fine powder can be removed from the suction air. In addition, when some of the many vent holes at the tip are exposed on the water surface, the suction air sent from the portion exposed on the water surface is directed toward the water surface by the shade, thereby The fine powder and air bubbles contained in the air can be efficiently brought into contact with each other, and more fine powder can be removed from the suction air.

(5) Since the tip of the pipe is opened downward in water and a large number of vent holes are formed in the peripheral wall surface of the tip, a large number of vent holes on the peripheral wall surface of the tip part are finely divided. Can prevent clogging.

It is a side view of the suction wheel in the embodiment of the present invention. It is a top view of the suction wheel of FIG. It is a rear view of the suction wheel of FIG. It is a side view which shows the detail of a bubble type dust collector. It is an expanded sectional view of the A section of FIG. FIG. 6 is a view taken in the direction of arrow B in FIG. 5. It is a piping system diagram of the suction device of FIG.

  1 is a side view of a suction wheel according to an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a rear view. 1 to 3, the suction wheel 1 according to the embodiment of the present invention includes a vehicle 10 and a suction device 20 mounted on the vehicle 10. The vehicle 10 includes a cab 11 and a chassis frame 12. An engine (not shown), a drive shaft (not shown), a PTO (power take-out device (not shown)), wheels 14 and the like are attached to the chassis frame 12.

  The sub frame 13 mounted on the chassis frame 12 extends in the front-rear direction of the vehicle 10. The suction device 20 includes the subframe 13 and is configured by each device mounted on the subframe 13. A receiver tank 21 as a primary catcher is installed at the rear portion of the subframe 13. In this specification, the cab 11 side of the vehicle 10 will be referred to as the front side, the receiver tank 21 side as the rear side, the right side of the vehicle 10 from the receiver tank 21 side toward the cab 11 side will be described as the right side, and the left side will be described as the left side. .

  The front portion of the subframe 13 includes a cyclone dust collector 22 as a secondary catcher, a bubble dust collector 23 as a tertiary catcher, a cyclone dust collector 24 as a fourth catcher, and a blower that generates suction negative pressure. Roots blower 25 and silencers 26 and 27 are arranged. The roots blower 25 is driven by the engine through the aforementioned PTO.

  As shown in FIG. 4, the bubble dust collector 23 includes a tank 30 in which water is stored, a pipe 31 connected to the downstream side of the cyclone dust collector 22, and a cylindrical portion 32 provided on the tank 30. Consists of The piping 31 is formed by a round pipe or the like, and is inserted into the tank 30 through the side of the cylindrical portion 32. As shown in FIGS. 5 and 6, the distal end portion of the pipe 31 is constituted by a discharge portion 33 formed into a cylindrical shape by a punching plate having a large number of holes.

  A large number of holes in the punching plate on the peripheral wall surface constituting the discharge portion 33 form a large number of ventilation holes 34. In addition, although the discharge part 33 of the piping 31 is arrange | positioned at the height where many ventilation holes 34 are immersed in the water in the tank 30, it is set as the height where a part of many ventilation holes 34 is exposed on the water surface. . Moreover, the front end surface (lower surface) of the discharge part 33 is the open part 35 open | released downward in water, and makes the inside of the discharge part 33 easy to clean.

  Further, the pipe 31 is provided with a shade 36 covering the upper surface of the pipe 31 at the top of the numerous vent holes 34. The shade 36 includes a cylindrical portion 36 a having a diameter larger than that of the pipe 31 and a lid portion 36 b that covers a space between the upper portion of the cylindrical portion 36 a and the pipe 31. In addition, the lower part of the cylindrical part 36a is open | released toward the water surface. Moreover, the shade 36 is arrange | positioned in the height from which a some clearance gap is formed between water surfaces.

  The bubble dust collector 23 and the cyclone dust collector 24 are separated by a partition wall 30 ′ of the tank 30. Moreover, since the cyclone dust collectors 22 and 24 are the structure similar to a well-known cyclone type dust collector, detailed description is abbreviate | omitted.

  Next, the piping system of the suction device 20 will be described with reference to FIG. FIG. 7 is a piping system diagram of the suction device 20.

  As shown in FIG. 7, the exhaust port 21 b of the receiver tank 21 that is the primary catcher and the intake port 22 a of the cyclonic dust collector 22 that is the secondary catcher are connected by a pipe 40. The exhaust port 22b of the cyclone type dust collector 22 and the intake port 23a of the bubble type dust collector 23 which is a tertiary catcher are connected by a pipe 41. A pipe 42 is connected to the exhaust port 23 b of the bubble dust collector 23. The tip of the pipe 42 is connected to the intake port 25a of the roots blower 25 via the silencer 26.

  Further, the exhaust port 25b of the Roots blower 25 and the intake port 24a of the cyclone type dust collector 24 which is a quaternary catcher are connected to each other by pipes 43 and 44 through a silencer 27. Further, a pipe 45 that branches from the middle of the pipe 41 and bypasses to the atmospheric suction port 24c of the cyclone type dust collector 24 is connected. A load release valve 28 is provided in the middle of the pipe 45. A coupled meter 29 is connected to the pipe 42.

  Next, the operation | movement at the time of collect | recovering fine powders, such as coal ash and activated carbon, as a collection target object with the suction device 20 of the said structure is demonstrated. For the collection of activated carbon, the tip of a suction hose (not shown) connected to the suction port 21a of the receiver tank 21 is brought close to used coal ash generated in large quantities at a steel mill or the like, and the roots blower is driven by the power of the engine. This is done by driving 25.

  Thereby, the air in the receiver tank 21 is sucked by the roots blower 25 through the pipe 40, the cyclone type dust collector 22, the pipe 41, the bubble type dust collector 23, the pipe 42 and the silencer 26. As a result, the pressure in the receiver tank 21 decreases, and the coal ash that is the recovery target is recovered in the receiver tank 21.

  At this time, the suction air in the receiver tank 21 sucked by the roots blower 25 flows into the cyclone type dust collector 22 through the pipe 40. The cyclone type dust collector 22 collects dust or the like that has not been collected by the receiver tank 21. Further, the fine powder that could not be removed by the cyclone dust collector 22 is sent to the bubble dust collector 23 through the pipe 41 together with the suction air that has flowed out of the cyclone dust collector 22.

  In the bubble dust collector 23, the suction air flowing in from the intake port 23a through the pipe 41 is sent to the lower side of the tank 30 through the pipe 31, and the opening part 35 on the lower surface of the discharge part 33 formed into a cylindrical shape and the peripheral wall surface A large number of vent holes 34 are discharged. At this time, bubbles are generated in the water by sucking the sucked air into the water from the air holes 34 below the water surface among the many air holes 34 on the peripheral wall surface of the discharge portion 33. In the bubble dust collector 23, the fine powder contained in the suction air is captured by the bubbles, and the fine powder is removed from the suction air.

  Further, in this bubble dust collector 23, a part of the numerous air holes 34 of the discharge part 33 is exposed on the water surface, so that a part of the suction air is sent into the tank 30 without passing through the water. . Therefore, the momentum of the suction air sent out into water is suppressed, and the blow-up of the water by suction air is prevented.

  In the bubble dust collector 23 in the present embodiment, the inner diameter of the vent hole 34 is 10 mm, but the inner diameter can be changed within a range of 6 to 12 mm. In this range, when the suction pressure of the Roots blower 25 is set to −50 to 60 kPa (gauge pressure), fine particles having a particle diameter of 1 to 40 μm can be removed most efficiently.

  In addition, since the bubble dust collector 23 is provided with a shade 36 that covers the upper surface of the discharge unit 33, bubbles generated by suction air sent from a large number of air holes 34 of the discharge unit 33 are generated around the discharge unit 33. It comes to stay. Thereby, the fine powder and air bubbles contained in the suction air come into efficient contact, and more fine powder can be removed from the suction air.

  In particular, in the bubble dust collector 23, a part of the numerous vent holes 34 of the discharge portion 33 is exposed on the water surface, so that the suction sent from the vent hole 34 in the portion exposed on the water surface. Air collides with the shade 36 and is directed to the water surface. Thereby, the suction air discharged | emitted from the ventilation hole 34 comes to contact with a bubble further, and it is possible to remove more fine powder from suction air.

  Moreover, in this bubble type dust collector 23, since the front-end | tip of the discharge part 33 is the open part 35 open | released downward in water, the fine powder contained in the suction air sent through the piping 31 is open | released in this water. It is sent out into the water from the open part 35. Therefore, the numerous air holes 34 on the peripheral wall surface of the discharge portion 33 are prevented from being clogged with fine powder.

  As described above, in the bubble dust collector 23 in the present embodiment, the fine powder contained in the suction air is captured by the bubbles generated by the numerous air holes 34 of the discharge unit 33, and the fine powder is removed from the suction air. Then, the suction air from which fine powder has been removed is discharged from the inside of the tank 30 through the cylindrical portion 32 and from the exhaust port 23b, and passes through the pipe 42, the silencer 26, the roots blower 25, the pipe 43, the silencer 27, the pipe 44, and the cyclone type dust collector 24. Then, it is discharged from the exhaust port 24b to the outside.

  In the suction device 20 according to the present embodiment, the collection target can be transported in a stable state by opening the load release valve 28 after the suction work is completed, thereby setting the interior of the receiver tank 21 to atmospheric pressure. Further, by providing the load release valve 28 in the middle of the pipe 45, the water in the tank 30 is prevented from flowing back to the cyclone type dust collector 22 through the pipes 31 and 41 and ruining the collected recovery object. be able to.

  The suction device of the present invention and the suction wheel equipped with the suction device are useful as a device for sucking and collecting a light and fine collection object such as coal ash, activated carbon, sand and cement using negative pressure. In particular, the present invention is suitable as an apparatus for sucking and collecting a collection object containing fine powders such as coal ash and activated carbon.

DESCRIPTION OF SYMBOLS 1 Suction vehicle 10 Vehicle 11 Cab 12 Chassis frame 13 Sub frame 14 Wheel 20 Suction device 21 Receiver tank 22, 24 Cyclone type dust collector 23 Bubble type dust collector 25 Roots blower 26, 27 Silencer 30 Tank 31 Piping 31 'Bulkhead 32 Cylindrical part 33 Discharge part 34 Ventilation hole 35 Opening part 36 Shade 36a Cylindrical part 36b Cover part

Claims (6)

A receiver tank that collects an object to be collected by the suction pressure of the blower;
A cyclonic dust collector connected to the receiver tank;
A pipe connected to the downstream side of the cyclone-type dust collector and having a large number of vent holes formed at the tip, and a tank in which water is stored inside and a large number of the vents at the tip of the pipe are immersed in the water A bubble dust collector composed of
A blower connected to the bubble dust collector;
A suction device including a dust collector connected to the blower.   2. The suction device according to claim 1, wherein the pipe has a part of a large number of vent holes at the tip end exposed on the water surface.   2. The suction device according to claim 1, wherein all of the numerous vent holes at the tip end are immersed in water.   The suction device according to any one of claims 1 to 3, wherein the bubble dust collector further includes a shade covering the upper surface of the water at the tip of the pipe.   The suction according to any one of claims 1 to 4, wherein the pipe has a distal end surface that is opened downward in the water and the numerous vent holes are formed in a peripheral wall surface of the distal end portion. apparatus.   A suction wheel provided with the suction device according to claim 1.

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