WO2005038141A1 - 路面の付着物除去装置並びに路面の付着物除去方法 - Google Patents
路面の付着物除去装置並びに路面の付着物除去方法 Download PDFInfo
- Publication number
- WO2005038141A1 WO2005038141A1 PCT/JP2004/015632 JP2004015632W WO2005038141A1 WO 2005038141 A1 WO2005038141 A1 WO 2005038141A1 JP 2004015632 W JP2004015632 W JP 2004015632W WO 2005038141 A1 WO2005038141 A1 WO 2005038141A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- road surface
- sieve
- shot
- shot material
- pulverized
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
- B24C3/065—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable with suction means for the abrasive and the waste material
- B24C3/067—Self-contained units for floorings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the present invention relates to an apparatus for removing a deposit on a road surface and a method for removing a deposit on a road surface. More specifically, the present invention relates to a road surface deposit removing device and a road surface deposit removing method which attempt to enhance the removal efficiency of the ground by sieving the shot material and the ground. Background art
- an instruction display line of a pedestrian crossing is drawn on a road surface using a paint made of resin or the like.
- This indication line may be erased using an adhering matter removal device (shot blast device) because it is necessary to change the place where it is drawn with new construction, improvement, re-paving, etc. .
- an adhering matter removing device described in Japanese Patent Application Laid-Open No. 2002-363916 discloses a projecting means for projecting a shot material onto an instruction display line, which is an adhering material adhering to the road surface, And a suction path for sucking a return material including a powdery adhered substance (pulverized pulverized substance).
- the adhering matter in the return material that passes through the suction path and is collected in the separation chamber is suctioned and removed by the suction means provided at the top of the separation chamber, and the remaining shot material is provided at the bottom of the separation chamber. It is supplied to the projecting means, and is repeatedly used for removing deposits.
- the powdery deposits in the return material are sucked and removed by a suction means provided in the upper part of the separation chamber.
- a suction means provided in the upper part of the separation chamber.
- the present invention has been made in view of the above points, and can improve the efficiency of removing pulverized material from a return material, and can reduce the influence of a force and an increase or decrease in the amount of pulverized material on a road surface. It is an object of the present invention to provide an attached matter removing device and a method for removing attached matter on a road surface.
- the present invention provides a road surface adhering substance removing apparatus, comprising: a projection unit configured to project a shot material made of a solid material onto a road surface; and the projected shot material and the shot material.
- a road surface adhering matter removing device provided with a suction means for sucking a return material including a powdery pulverized material from which the material is projected and removed from the road surface, the shot material is separated from the return material and separated.
- a separating means configured to supply the shot material to the projecting means, the separating means having a sieve through which the pulverized material is passed, and separating the shot material and the pulverized material from each other. Is provided.
- the shot material and the crushed material are separated, so that, for example, even when the crushed material is mixed in the shot material, the removal of the crushed material is ensured. It can be implemented efficiently and efficiently.
- the “road surface” here refers to, for example, a road surface having a shear force of 1 or 2 or more of a concrete surface, an asphalt surface, a brick, and other ceramics, and may also mean a floor surface.
- “Pulverized material” includes, for example, a pedestrian crossing instruction display line (white line) formed on the road surface using a resin paint or the like, a vehicle traffic division, a regulation display line indicating the roadside zone, and a traveling direction. Indicates the adherence of an indicator line, a coating film, etc. indicating the surface of a road, concrete, asphalt, brick, and other ceramics that form one or more of the ceramics that form the road surface.
- a shot material made of a solid material is projected on a road surface, and the shot material and the shot material that have been projected and removed from the road surface are projected.
- the suctioned shot material and the pulverized material are separated by a sieve, and the separated shot material is separated from the road surface.
- the pulverized material can be reliably and efficiently removed.
- the apparatus for removing adhering matter from a road surface can increase the efficiency of removing pulverized material from the return material, and can reduce the influence of the force and the increase or decrease in the amount of pulverized material.
- the method for removing deposits on the road surface according to the present invention can increase the efficiency of removing pulverized material from the return material, and can reduce the influence of the force and the increase or decrease of the amount of pulverized material.
- FIG. 1 is an explanatory view of an apparatus for removing deposits on a road surface according to an embodiment of the present invention
- FIG. 2 is an explanatory view of a sieve member of the apparatus for removing deposits on a road surface
- FIGS. 3 (A) and 3 (B) Is a side sectional view and a partial front view of the vibration means of the apparatus for removing adhering substances on the road surface
- FIG. 4 shows another embodiment of the separation chamber provided in the apparatus for removing adhering substances on the road surface to which the present invention is applied. It is an outline sectional view.
- an apparatus for removing adhering matter on a road surface adheres to a road surface 12 which is a surface of a road 11.
- the road surface 12 is, for example, an asphalt surface or a concrete surface.
- the deposit 13 may be, for example, a paint type for forming a thin coating film, a heating type for heating the coating material to about 70-80 ° C to form a medium coating thickness, or a coating method for coating at about 200 ° C.
- This is an indication display line (white line) of a crosswalk drawn by a welding method or the like, which is applied by heating to form a thick coating film. The details will be described below.
- the adhering matter removal device 10 has a projection means 15 and a suction path 18 mounted thereon, and is provided with wheels 19 and wheels 20 before and after, respectively. have. This facilitates movement of the attached matter removing device.
- the projecting means 15 disposed on one side of the mounted carriage 22 is provided obliquely (for example, 40 to 70 degrees) with respect to the road surface 12, and has a shot material at its upstream end. 14 is provided with an inlet 23, and at the downstream end is provided a projection port 24 for shot material 14. It has 25 things.
- the cross-sectional shape of the projection port 24 is, for example, a rectangle having a width of about 5 cm and a depth of about 30 cm.
- the projection means 15 includes a rotating body (impeller) 26 provided at the upstream end of the casing 25 and provided with a plurality of projection blades provided radially around the axis and a rotating body 26. And an electric motor 27 for driving the rotation about the axis.
- the electric motor 27 is capable of rotating a rotating body 26 via a pulley (not shown) and a rotating shaft 28.
- an impeller (not shown) is provided at the axis of the rotating body 26, and the impeller allows the shot material 14 to be supplied to the projection blade of the rotating body 26 in a required amount.
- the shot material 14 supplied to the inside of the projection port 24 is hit against the deposit 13 on the road surface 12 at a speed of, for example, 50-100 mZ seconds by the centrifugal force of the projection blade of the rotating body 26.
- the suction path 18 disposed on the other side (front side with respect to the traveling direction 64) of the mounting carriage 22 is disposed on the opposite side of the projection port 24 with the road surface 12 on which the shot material 14 is projected at the center.
- the force ⁇ is also provided obliquely (for example, 40 to 70 degrees) with respect to the road surface 12, and a suction port 29 is provided at an upstream end thereof.
- the cross-sectional shape of the suction port 29 is, for example, a rectangle having a width of about 10 cm and a depth of about 30 cm.
- the downstream ends of the suction port 29 and the projection port 24 are surrounded by an opening 30 provided with a slight gap (for example, about 5 to 10 mm) from the road surface 12.
- a magnet (not shown) and a brush 31 are provided on the front and both peripheral edges of the opening 30, and a leak stop plate 32 that slides on the road surface 12 is provided on the rear side.
- the leak prevention plate 32 is made of rubber and has a rectangular shape. The distance between the opening 30 and the road surface 12 can be adjusted by moving the opening 30 up and down with respect to the suction port 29 and the projection port 24, or by placing a thin steel plate or the like on the magnet provided in the opening 30. Do.
- the magnet, the brush 31 and the leak prevention plate 32 provided around the opening 30 are arranged so as to surround the projection port 24, the suction port 29, and the portion to be processed of the road surface 12.
- the shot material 14 projected from the projection port 24 can be sent to the suction path 18 through the suction port 29 without leaking to the outside.
- a casing 35 having a first sieve member 33 and a second sieve member 34 therein is disposed on the outlet side of the suction passage 18, and is disposed downward.
- a separation chamber 37 provided with a powder outlet 36 is connected.
- the first sieve member 33 has a first screen 38 and a second screen 39 which are attached to the inner wall of the casing 35 at an angle of, for example, about 5 to 30 degrees.
- a second screen 39 is provided downstream of and below the first screen 38.
- a gap 40 is provided between the inner wall of the separation chamber 37 and the downstream end of the first screen 38 in a plan view, and the upstream end of the second screen 39 is provided below the gap 40.
- the sieve size is smaller than the particle size of the shot material 14 and larger than the size of the powdery deposit 16, and the shot material 14 and the powder It can be separated from the adhering substance 16 in the shape of a circle.
- the remaining powdery deposits 16 that could not be separated from the return material 17 on the first screen 38 flowed down from the first screen 38 and then dropped onto the second screen 39. Separated.
- the first sieve member 33 is disposed with a gap below the first screen 38 and has an inclined plate 41 provided on the inner wall of the casing 35. Above one side (side portion) of the inclined plate 41, a nozzle 42 provided with a large number of ejection holes at substantially equal intervals in the longitudinal direction is arranged, separated by a first screen 38 and placed on the inclined plate 41.
- the dropped powdery deposit 16 can be driven to the other side by the flow of air (air flow) blown through the nozzle 42. By this air flow, scattering of the powdery pulverized material can be suppressed, and the shot material collecting operation becomes easy. Further, since the inclined plate is arranged between the first screen and the second screen, the first sieve member can be made compact.
- the downstream end of the inclined plate 41 has a gap 43 with the inner wall of the casing 35, and the powdery deposits 16 dropped from the gap 43 are separated from the open bottom of the casing 35 by the separation chamber 37. It is configured to be output to the outside through a powder discharge port 36 provided at the lower part of the container.
- a powder discharge port 36 provided at the lower part of the container.
- One end of a flexible hose is connected to the powder discharge port 36, and a vacuum dust collector (not shown) is provided at a downstream end of the flexible hose.
- the powdery deposit 16 discharged from the powder discharge port 36 is collected by the vacuum dust collector via the flexible hose.
- the return member 17 can be vacuum-suctioned through the suction passage 18 by the suction action of the vacuum dust collector.
- the second sieve member 34 is disposed on the upstream side of the first screen 38 and horizontally above the first screen 38, and the size of the sieve is smaller than the particle size of the shot material 14.
- the size of the large crushed material for example, the aggregate that constitutes the road
- the shot material 14 for example, the particle size exceeds about 3 mm
- the size of the large crushed material is smaller than the size of the return material 17. It is capable of removing crushed material from the wastewater.
- a vibration means 44 is attached to the first sieve member 33 and the second sieve member 34 via a casing 35. I have.
- the vibrating means 44 corresponds to two fixing brackets 46 attached to both ends in the width direction of the upper surface of the casing 35 with fixing screws 45, a sieving bearing 47 provided on each fixing bracket 46, and a sieving bearing 47. And two shafts 49 each having a sieve pipe 48 provided at the designated position, and the sieve pipe 48 is rotatably inserted into the sieve bearing 47.
- the sieve pipe 48 is attached to the shaft 49 such that the axis of the sieve pipe 48 is different from the axis of the shaft 49.
- the shaft 49 on one side is connected to a drive motor 50 provided on the side of the separation chamber 37, and the shaft 49 on the other side is a bearing mounting bracket disposed on the upper part of the inner wall of the separation chamber 37. It is rotatably mounted on a shaft receiving bearing 52 provided on 51. To attach the shaft 49 to the drive motor 50 and the shaft receiving bearing 52, adjust the length at the connection part 53 connecting the two shafts 49, and fix the adjustment position using the split pin 54. Do it by doing.
- the sieve pipe 48 rotates eccentrically about the shaft 49. For this reason, the casing 35 swings up, down, left and right with the rotation of the shaft 49, and the shot material 14 and the powdery deposit 16 from the return material 17 can be more effectively removed.
- a transport path 56 for the shot material 14 is provided inside the separation chamber 37 along the side wall thereof.
- a shot material input port 57 is provided above the transport path 56, and a shot material input port 57 is provided below the transport path.
- Each outlet 58 is provided.
- a relay path 59 communicating with the downstream end of the second screen 39 inside the casing 35 is provided in the middle of the transport path 56.
- the shot material discharge port 58 is provided with a shutter 60, and by adjusting the opening ratio of the shot material discharge port 58, an appropriate amount of the shot material 14 can be supplied to the projection port 24.
- the shot material 14 separated from the return material 17 is supplied to the projection port 24 and can be repeatedly used for removing the deposit 13 on the road surface 12. Further, the powdery deposit 16 separated from the return material 17 and collected by the vacuum dust collector is discarded after the operation of removing the deposit 13 is completed.
- a handle 61, an operation unit 62, and a control unit 63 are provided on the front side of the mounting cart 22, and the operation unit 62 includes, for example, a main switch, an electric motor ONZOFF switch, and a usage time measuring device.
- the control unit 63 includes, for example, an emergency stop switch, a forward / backward switching switch, a movement speed adjustment switch, an ammeter, and the like, and is capable of controlling and controlling the attached matter removing device 10.
- FIG. 4 is a schematic cross-sectional view showing another embodiment of the separation chamber provided in the apparatus for removing deposits on a road surface to which the present invention is applied.
- the separation chamber is provided with a first sieve member 33 having a first screen 38 and a second screen 39 therein, and a first sieve member disposed upstream thereof.
- a second sieve member 34 having a larger sieve mesh and an iron shot material 14, dust 16a, and pebble 16b located near the second sieve member and having magnetic force attracted through the suction passage are provided in the separation chamber.
- the compressed air 42a is applied to the dust 16a and the shot material 14 that have passed through the second sieve member and fall on the first screen 38 and the second screen 39.
- One 66, the case without passing through the second sieve member A dust collecting chamber 68 where the pebbles 16b passing through the pebble drop openings 69 and dust 16a passing through the first sieve member and the second sieve member are collected, and a dust collecting chamber 68 provided at a lower part of the dust collecting chamber.
- the shot material 14 is introduced through the powder discharge port 36 configured to discharge pebbles and dust and the relay path 59 provided in the casing opposite to the casing provided with the pebble drop port.
- the feeding path communicates with the projection means, and the collected shot material is supplied to the projection means.
- the second sieve member having a larger sieve than the first sieve member is located upstream, a large crushed material larger than the shot material is returned to the return material cover by the second sieve member. Can be removed in advance, and large crushed materials can be prevented from entering the projecting means. For example, failure of the projecting means due to large crushed materials can be suppressed, and the attached matter removing device can be stably operated.
- the shot material and the dust are separated by the first screen 38 and the second screen 39, the dust can be reliably and efficiently removed even if the dust is mixed in the shot material, and the dust is removed. Even if the amount increases, dust can be removed reliably and efficiently. Therefore, the work can be continuously performed without stopping the attached matter removing device during the work, so that the work efficiency can be improved and the workability can be improved.
- the nozzle, the second sieve member, and the feeder need not be attached as long as the shot material can be separated by dust or the like.
- the dust is forcibly blown off and dropped, and the dust heated by the impact of the shot material is cooled and hardened, so that it becomes easier to screen. Then, the aggregation and solidification of the dust particles can be suppressed, and the blockage of the dust transfer passage can be suppressed.
- the gas sprayed on the dust 16a or the shot material 14 is a gas, it is not always necessary to use compressed air.
- the operator puts the main switch of the operation unit 62 and moves the attached matter removing device 10 to the work place by the mounting trolley 22 while adjusting the traveling direction with the handle 61.
- the worker inputs the shot material 14 in advance from the shot material input port 57 of the separation chamber 37.
- the operator puts the switch 55, operates the drive motor 50, vibrates the casing 35 via the vibration means 44, and vibrates the first sieve member 33 and the second sieve member 34.
- the air supply pump is operated to supply air to the nozzle 42.
- the vacuum pump provided in the vacuum dust collector is operated so that the powdery deposit 16 can be sucked into the vacuum dust collector.
- the operator operates the operation unit 62 and the control unit 63 to perform the work of removing the deposit 13 on the road surface 12.
- the shot material 14 projected from the projection port 24 is It collides with the deposit 13 on the road surface 12 and is sucked into the suction passage 18 through the suction port 29 as the return material 17 together with the powdery deposit 16 and the crushed crushed material.
- the return material 17 also includes a small powdery material (for example, sand or the like) that has constituted a road having a particle diameter of, for example, less than 1 mm, which has been pulverized by the shot material 14.
- the return material 17 that has flowed into the separation chamber 37 from the suction passage 18 is first treated by the second sieve member 34, and large crushed materials are removed from the return material 17.
- the return material 17 from which the crushed material has been removed falls to the first sieve member 33, and the crushed material remaining on the second sieve member 34 is removed after the removal operation is completed.
- the fallen return material 17 is processed by the first screen 38 of the first sieve member 33, and most of the powdery deposits 16 contained in the return material 17 are removed by the first screen 38. After passing through the sieve, it falls onto the inclined plate 41. At this time, most of the powdery material also falls on the inclined plate 41 together with the powdery deposit 16.
- the dropped powdery deposit 16 and the powdery substance are driven by the air blown out from the nozzle 42 into the gap 43 and fall from the gap 43 to the powdery discharge port 36 of the separation chamber 37. Since the powdery deposit 16 is usually made of resin, the powdery deposit 16 is softened by heat generated by the impact of the shot material 17 or the like, and is powdery by air blown from the nozzle 42. The deposit 16 is cooled. Thereby, even if the powdery deposit 16 comes into contact with the shot material 14, it can be prevented from adhering to the shot material 14.
- the return material 17 including the shot material 14 remaining on the first screen 38 is the first screen together with a small amount of powdery deposit 16 and the powdery material that have passed through the sieve. It flows down 38 and is processed on a second screen 39.
- the powdery deposit 16 and the powdery substance contained in the return material 17 pass through the sieve of the second screen 39 and fall into the powder discharge port 36 of the separation chamber 37.
- the powdery deposit 16 and the powdery substance that have fallen into the powder discharge port 36 are collected by the vacuum dust collector via the flexible hose.
- the shot material 14 from which the powdery deposit 16 and the powdery material have been removed flows down the second screen 39, flows into the transport path 56 via the relay path 59, and flows out of the shot material discharge port 58. It is supplied to the projection port 24 repeatedly.
- the above operation is repeatedly performed, and the operation of removing the deposit 13 on the road surface 12 is performed.
- the operator turns off the main switch of the operation unit 62, stops the deposit removal device 10, and removes the powdery deposit 16 and the dust collected by the vacuum dust collector. Remove the powdered material from the vacuum precipitator and discard.
- the present invention has been described with reference to one embodiment.
- the present invention is not limited to the configuration described in the above-described embodiment and is described in the claims. V.
- Other embodiments and modifications that can be considered within the scope of the above are also included.
- the case where a part or all of the above-described embodiments and modified examples are combined to constitute the road surface deposit removing device of the present invention is also included in the scope of the present invention.
- the present invention is also applicable to a case where the apparatus for removing deposits on a road surface of the present invention is used for forming irregularities on a road surface such as a concrete surface or an asphalt surface.
- the powdery material generated by projecting the shot material onto the road surface corresponds to the pulverized material.
- FIG. 1 is an explanatory view of an apparatus for removing deposits on a road surface according to an embodiment of the present invention.
- FIG. 2 is an explanatory view of a sieve member of the apparatus for removing deposits on the road surface.
- 3 (A) and 3 (B) are a side sectional view and a partial front view, respectively, of a vibrating means of the attached matter removing device on the same road surface.
- FIG. 4 is a schematic cross-sectional view showing another embodiment of the separation chamber provided in the road surface deposit removing apparatus to which the present invention is applied.
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- Road Repair (AREA)
Abstract
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Application Number | Priority Date | Filing Date | Title |
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JP2005514868A JPWO2005038141A1 (ja) | 2003-10-22 | 2004-10-21 | 路面の付着物除去装置並びに路面の付着物除去方法 |
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JP2003-362259 | 2003-10-22 | ||
JP2003362259 | 2003-10-22 |
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WO2005038141A1 true WO2005038141A1 (ja) | 2005-04-28 |
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Cited By (5)
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JP2007245309A (ja) * | 2006-03-17 | 2007-09-27 | Hitachi Plant Technologies Ltd | ブラスト媒体の回収装置及びその方法 |
CN102776855A (zh) * | 2012-07-31 | 2012-11-14 | 中联重科股份有限公司 | 清洁用吸嘴和清洁车 |
CN102776856A (zh) * | 2012-07-31 | 2012-11-14 | 中联重科股份有限公司 | 清洁用吸嘴和清洁车 |
CN103015354A (zh) * | 2012-12-26 | 2013-04-03 | 烟台海德专用汽车有限公司 | 一种超宽垃圾粉碎收集装置 |
CN104328757A (zh) * | 2014-11-27 | 2015-02-04 | 中国重汽集团柳州运力专用汽车有限公司 | 道路清扫车 |
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- 2004-10-21 WO PCT/JP2004/015632 patent/WO2005038141A1/ja active Application Filing
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JPH08108366A (ja) * | 1994-10-07 | 1996-04-30 | Sintokogio Ltd | 移動式ショットブラスト設備 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007245309A (ja) * | 2006-03-17 | 2007-09-27 | Hitachi Plant Technologies Ltd | ブラスト媒体の回収装置及びその方法 |
JP4688063B2 (ja) * | 2006-03-17 | 2011-05-25 | 株式会社日立プラントテクノロジー | ブラスト媒体の回収装置 |
CN102776855A (zh) * | 2012-07-31 | 2012-11-14 | 中联重科股份有限公司 | 清洁用吸嘴和清洁车 |
CN102776856A (zh) * | 2012-07-31 | 2012-11-14 | 中联重科股份有限公司 | 清洁用吸嘴和清洁车 |
CN102776856B (zh) * | 2012-07-31 | 2014-10-29 | 中联重科股份有限公司 | 清洁用吸嘴和清洁车 |
CN103015354A (zh) * | 2012-12-26 | 2013-04-03 | 烟台海德专用汽车有限公司 | 一种超宽垃圾粉碎收集装置 |
CN104328757A (zh) * | 2014-11-27 | 2015-02-04 | 中国重汽集团柳州运力专用汽车有限公司 | 道路清扫车 |
CN104328757B (zh) * | 2014-11-27 | 2016-03-30 | 中国重汽集团柳州运力专用汽车有限公司 | 道路清扫车 |
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