JP2007002457A - Sediment suction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sediment suction apparatus capable of preventing the clogging of a hose caused by sticking and the growth of sediment and preventing the enlargement of contamination by wash water. <P>SOLUTION: The sediment suction apparatus 1 is constituted by connecting a carrier hose 4 to a suction nozzle 3 for sucking sediment 2, and connecting a sediment separator 5 to the carrier hose 4. A suction ejector 6 for generating a suction flow for sucking the sediment 2 is formed on the inner peripheral surface 10 of the suction nozzle 3, and compressed air is supplied from the suction ejector 6 to pneumatically feed the sediment 2 at positive pressure to the sediment separator 5 from the suction nozzle 3 through the carrier hose 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sediment suction device that sucks sediment from a suction nozzle and air-sends it to a sediment separation device, and in particular, sediment adheres and grows in a hose connecting the suction nozzle and the sediment separation device, and the hose is blocked. The present invention relates to an earth and sand suction device that can prevent the above.

  As an apparatus for removing contaminated earth and sand containing dangerous substances such as explosives, an earth and sand suction apparatus for sucking and sending the earth and sand by vacuum is known.

  As shown in FIG. 4, the earth and sand suction device 30 includes a suction nozzle 31 for sucking earth and sand, a hose 32 connected to the suction nozzle 31, a earth and sand separator 33 connected to the hose 32 and separating air and earth and sand, A vacuum suction device 34 that is connected to the earth and sand separator 33 and evacuates the inside of the hose 32 and the suction nozzle 31 is configured. According to this, since the earth and sand are sucked by the suction nozzle 31 and conveyed in the hose 32, it is possible to prevent an impact on dangerous substances (not shown) existing around the contaminated earth and sand when removing the earth and sand 35. In addition, it can be used limitedly for the contamination range.

JP 2004-324356 A JP 2004-324357 A JP 2004-324358 A

  However, since the earth and sand are air-fed under reduced pressure, the hose 32 has a structure that is highly rigid and difficult to deform so that the hose itself is not crushed. For this reason, the earth and sand were easy to adhere to the inner surface of the hose 32, and the attached earth and sand had the subject that it was hard to peel.

  And when earth and sand adhere to the inner surface of the hose 32, water must be supplied to the inside of the hose 32 from the tip of the suction nozzle 31 for cleaning, which is cumbersome and the cleaning water is discharged several hundred L / times. However, there is a problem that the contamination spreads to the surroundings.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a sediment suction device that can prevent the hose from being blocked due to adhesion / growth of sediment and prevent the spread of contamination by washing water.

  In order to solve the above-described problems, the present invention provides a sediment suction device in which a transport hose is connected to a suction nozzle that sucks soil and a sediment separator is connected to the transport hose. A suction ejector that generates a suction flow for sucking the water is formed, compressed air is supplied from the suction ejector, and the earth and sand are air-fed at a positive pressure from the suction nozzle to the earth and sand separator through the conveying hose.

  The suction ejector comprises a compressed air chamber formed in an annular shape along the circumferential direction of the suction nozzle, and a reverse injection nozzle hole for injecting the compressed air in the compressed air chamber to the rear side in the axial direction of the suction nozzle hole. It is good to do.

  The transfer hose is formed of a flexible material so as to expand and contract with the pressure of the compressed air injected from the suction ejector. The transfer hose expands and contracts with the pressure change of the compressed air supplied from the suction ejector, and removes the sediment adhering to the inner surface. It is good to peel and to be able to convey to a sediment separator.

  The said conveyance hose is accommodated in a hard protective hose, and it is good to form so that it may expand / contract within the protective hose.

  Compressed air supply means is connected to the suction ejector, and the compressed air supply means is preferably supplied by changing the pressure of the compressed air supplied to the suction ejector.

  According to the present invention, it is possible to prevent the hose from being blocked due to adhesion / growth of earth and sand, and to prevent the spread of contamination by washing water.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the earth and sand suction device 1 has a conveying hose 4 connected to a suction nozzle 3 that sucks earth and sand 2 and a earth and sand separating device 5 connected to the conveying hose 4.

  The suction nozzle 3 is formed in a substantially cylindrical shape, and has a suction ejector 6 that generates a suction flow for sucking the earth and sand 2 at an intermediate position in the axial direction. The suction nozzle 3 is a wrapper in which the inner diameter 7 of the suction ejector 6 and the front end 8 are formed to have substantially the same inner diameter, and the rear end 9 connected to the transport hose 4 is increased in diameter toward the downstream side. It is formed in a shape. Then, the earth and sand suction device 1 sucks the earth and sand 2 from the tip side of the suction nozzle 3 by supplying compressed air from the suction ejector 6 into the suction nozzle 3, and the sucked earth and sand 2 is conveyed from the suction nozzle 3 to the transport hose. 4 is sent to the earth and sand separator 5 by a positive pressure.

  The suction ejector 6 is formed on the inner peripheral surface 10 of the suction nozzle 3, and the compressed air chamber 11 is formed in an annular shape along the circumferential direction of the suction nozzle 3, and the compressed air in the compressed air chamber 11 is sucked into the suction nozzle 3. And the reverse injection nozzle hole 13 for injecting the suction nozzle hole 12 to the rear in the axial direction. The compressed air chamber 11 is connected to a compressed air supply means 14 to be described later via a flexible air pipe 15, and the compressed air supplied from the compressed air supply means 14 is immediately before a reverse injection nozzle hole 13 to be described later. In this way, pressurized air is supplied uniformly to the reverse injection nozzle holes 13 in the circumferential direction. The reverse injection nozzle hole 13 is formed in an annular groove shape extending inward in the radial direction from the compressed air chamber 11 and extending rearward, and is configured to inject pressurized air substantially uniformly over the entire circumference. The compressed air supply means 14 includes a compressor 16 and a valve 17 that changes the pressure of the compressed air discharged from the compressor 16. The valve 17 is configured to open and close periodically, and changes the pressure of the compressed air in a pulse manner.

  The transport hose 4 is formed of a flexible material that expands and contracts by the pressure of the compressed air injected from the suction ejector 6, and expands and contracts by the pressure change of the compressed air supplied from the suction ejector 6, and the earth and sand 2 adhered to the inner surface thereof. Can be peeled off. Specifically, the transport hose 4 is made of a rubber-like wear resistant resin such as synthetic rubber. The transport hose 4 is connected to the suction nozzle 3 with one end covering the outer periphery of the rear end portion 9 of the suction nozzle 3, and the other end is inserted into the intake port 18 of the earth and sand separation device 5. It is connected to, and the step which prevents the flow of the earth and sand 2 is not formed in a connection location. The transport hose 4 is housed in a hard protective hose 19. The protective hose 19 has an inner diameter sufficiently larger than the maximum outer diameter of the transport hose 4 so that a gap is left between the protective hose 19 and the transport hose 4 even when the transport hose 4 is completely expanded. The hose 4 is freely expanded and contracted in the protective hose 19. Specifically, the protective hose 19 has a spiral reinforcing material 25 and is made of a flexible pipe material that maintains the outer peripheral shape with the reinforcing material, such as a movable arm of a construction machine (not shown). Has come to be supported. The protective hose 19 is formed to be transparent or translucent so that the state of the transport hose 4 can be visually observed from the outside. Both ends of the protective hose 19 are airtightly connected to the suction nozzle 3 and the earth and sand separator 5, respectively.

  The earth and sand separator 5 includes a collision board 20 that causes the earth and sand 2 to collide and fall, and a earth and sand collection case 21 that receives and collects the earth and sand 2 that falls from the collision board 20. The impingement disk 20 is provided in a case-shaped earth and sand separation head 22 whose lower surface is opened. An exhaust pipe 23 for discharging air separated from the earth and sand 2 is connected to the upper part of the earth and sand separation head 22 via a filter 24. The earth and sand collection case 21 is detachably attached to the lower part of the earth and sand separation head 22 and is configured to be replaced with another empty earth and sand collection case 21 when the earth and sand 2 reaches a predetermined capacity. .

  Next, the operation of this embodiment will be described.

  When the earth and sand 2 is sucked, the tip of the suction nozzle 3 is brought close to the earth and sand 2 and the compressed air supply means 14 is operated. The compressed air from the compressed air supply means 14 is supplied to the compressed air chamber 11 of the suction ejector 6 through the air pipe 15, and the compressed air in the compressed air chamber 11 is axially rearward from the reverse injection nozzle hole 13 into the suction nozzle hole 12. It is injected towards. As a result, the air at the front end side of the suction nozzle hole 12 is drawn into the jet flow from the reverse injection nozzle hole 13, the front end side of the suction nozzle hole 12 is evacuated, and the earth and sand 2 are sucked into the suction nozzle hole 12. .

  The earth and sand 2 sucked by the suction nozzle 3 is air-fed by positive pressure from the suction nozzle 3 to the earth and sand separator 5 through the transport hose 4 by the jet flow from the reverse injection nozzle hole 13. At this time, the suction ejector 6 injects pressurized air from the reverse injection nozzle hole 13 formed in the inner peripheral surface 10 of the suction nozzle 3, and does not restrict the inner diameter of the suction nozzle 3. The earth and sand 2 does not adhere to the suction nozzle 3 and its suction ejector 6. In addition, since the earth and sand 2 are air-fed at a positive pressure, the transport hose 4 does not need to have a high rigidity to resist the atmospheric pressure and maintain the radial shape as in the case of evacuation, and the suction ejector 6 It can be made flexible by inflating from the pressure. And since the conveyance hose 4 is formed with a flexible material, it expands and contracts every time the pressure of the pressurized air changes, and can always be self-vibrated, and the earth and sand 2 adheres to the inner surface of the conveyance hose 4 and grows. Can be prevented in advance. As shown in FIG. 2, the protective hose 19 is formed with a sufficiently larger diameter than the transport hose 4, and therefore does not hinder the expansion and contraction of the transport hose 4.

  The earth and sand 2 sent to the earth and sand separator 5 through the transport hose 4 is separated from the air by hitting the collision board 20 and falls into the earth and sand collection case 21. The compressed air separated from the earth and sand 2 is discharged to the exhaust pipe 23 through the filter 24.

  In the unlikely event that the transport hose 4 is damaged by sharp foreign objects in the soil while the earth and sand 2 are being transported by air, the transport hose 4 is housed in the hard protective hose 19, The earth and sand 2 is not scattered around, and the earth and sand 2 can be continuously conveyed by the protective hose 19 instead of the conveying hose 4 for a short time until the operation is stopped. Since the protective hose 19 is formed to be transparent or translucent, the earth and sand 2 flowing out from the transport hose 4 can be easily visually confirmed, and the breakage of the transport hose 4 can be immediately known.

  Further, depending on conditions such as particle roughness of the earth and sand 2 and moisture, the earth and sand 2 may adhere to the transport hose 4, but the valve 17 of the compressed air supply means 14 is opened and closed at a short cycle of several seconds and compressed. By changing the pressure of the air in a pulsed manner, an impact caused by an air feeding fluid can be generated, and the earth and sand 2 can be easily peeled off from the inner surface of the transport hose 4.

  When the conveyance of the earth and sand 2 is finished and the operation of the earth and sand suction device 1 is stopped, the conveyance hose 4 is crushed as the internal pressure decreases, as shown in FIG.

  In this way, a suction ejector 6 that generates a suction flow for sucking the earth and sand 2 is formed on the inner peripheral surface 10 of the suction nozzle 3, compressed air is supplied from the suction ejector 6, and the suction nozzle 3 passes through the transport hose 4. Since the earth and sand 2 is air-fed to the earth and sand separator 5 at a positive pressure, a blower is not required and the entire apparatus is not required to have a sealed structure, so that the system configuration can be simplified and the earth and sand separator 5 is prevented from adhering to the earth and sand. A variety of mechanisms can be employed for and a flexible hose can be used.

  The suction ejector 6 includes a compressed air chamber 11 formed in an annular shape along the circumferential direction of the suction nozzle 3, and a reverse injection nozzle hole for injecting the compressed air in the compressed air chamber 11 to the rear side in the axial direction of the suction nozzle hole 12. 13, the tip of the suction nozzle 3 can be evacuated without narrowing the flow path of the earth and sand 2, and the structure can be simplified and highly reliable.

  The transport hose 4 is formed of a flexible material so as to expand and contract with the pressure of the compressed air injected from the suction ejector 6, and expands and contracts due to the pressure change of the compressed air supplied from the suction ejector 6, and the earth and sand adhered to the inner surface thereof 2 is peeled off and can be conveyed to the earth and sand separator 5, so that the earth and sand 2 can be prevented from adhering and growing in the conveying hose 4, and the conveying hose 4 can be prevented from being blocked by the earth and sand 2. . And since there is almost no need to wash the inside of the transport hose 4 with the washing water after the earth and sand is transported, it is possible to prevent the diffusion of contaminants adhering to the transport hose 4 and to save the trouble of washing and drying the transport hose 4. And the device operation rate can be improved.

  Since the transport hose 4 is housed in a hard protective hose 19 and is formed to expand and contract in the protective hose 19, the transport hose 4 can be easily held by causing the construction machine or the like to grip the protective hose 19 And the handling of the transport hose 4 can be facilitated. Moreover, even if the conveyance hose 4 is damaged, the diffusion of contaminated earth and sand can be prevented.

  Compressed air supply means 14 is connected to the suction ejector 6, and the compressed air supply means 14 is supplied by changing the pressure of the compressed air supplied to the suction ejector 6. Can be easily peeled off by the impact of the air transport fluid.

  In addition, although the compressed air supply means 14 shall consist of the compressor 16 and the valve | bulb 17, it is not restricted to this. When the earth and sand 2 to be handled has a property that is difficult to adhere to the transport hose 4, the valve 17 may be omitted.

  Further, although the transport hose 4 is made of wear-resistant resin such as synthetic rubber, it is not limited to this. Other materials such as cloth may be used as long as they have sufficient wear resistance and flexibility and are not easily torn. Furthermore, the conveyance hose 4 may be a conductive hose having conductivity. When the conveyed product is powder, adhesion of the powder due to generation of static electricity can be prevented.

It is a sectional side view of the earth and sand suction apparatus which shows suitable embodiment of this invention. It is AA arrow sectional drawing of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 when compressed air is not charged. It is a schematic explanatory drawing of the conventional earth and sand suction apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sediment suction apparatus 2 Sediment 3 Suction nozzle 4 Conveyance hose 5 Sediment separation apparatus 6 Suction ejector 10 Inner peripheral surface 11 Compressed air chamber 12 Suction nozzle hole 13 Reverse injection nozzle hole 14 Compressed air supply means 19 Protective hose

Claims (5)

  A suction ejector for generating a suction flow for sucking earth and sand is provided on the inner peripheral surface of the suction nozzle in the earth and sand suction device having a suction hose connected to a suction nozzle for sucking earth and sand and a sand and sand separator connected to the conveyance hose. An earth and sand suction device formed and supplied with compressed air from the suction ejector and air-fed the earth and sand at a positive pressure from the suction nozzle to the earth and sand separator through the transport hose.   The suction ejector includes a compressed air chamber formed in an annular shape along a circumferential direction of the suction nozzle, and a reverse injection nozzle hole for injecting the compressed air in the compressed air chamber to the rear side in the axial direction of the suction nozzle hole. Item 1. A soil suction device according to Item 1.   The transfer hose is formed of a flexible material so as to expand and contract with the pressure of the compressed air injected from the suction ejector. The transfer hose expands and contracts with the pressure change of the compressed air supplied from the suction ejector, and removes the sediment adhering to the inner surface. The earth and sand suction device according to claim 1 or 2, wherein the earth and sand suction device can be separated and conveyed to the earth and sand separator.   4. The earth and sand suction device according to claim 3, wherein the transport hose is accommodated in a hard protective hose and formed to expand and contract in the protective hose. The earth and sand suction device according to any one of claims 1 to 4, wherein compressed air supply means is connected to the suction ejector, and the compressed air supply means changes the pressure of the compressed air supplied to the suction ejector. .

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