JP3996089B2 - Sediment drilling suction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a soil excavation and suction device for excavating sediment using compressed air and sucking and discharging the excavated sediment, and in particular, releasing the suction soil before the suction hose adheres to and closes the suction hose. The present invention relates to a soil excavation and suction device.
[0002]
[Prior art]
Conventionally, as a device for excavating earth and sand, devices that excavate mechanically, such as excavators and augers, are mainly used, but if there is an embedded object in the earth and sand, do not damage the embedded object. In order to excavate, a drilling method using compressed air is employed.
[0003]
This excavation method is a method in which compressed air is blown onto the earth and sand from the excavation nozzle to break the surface, and then the earth and sand are sucked together with air from the suction cylinder accommodating the excavation nozzle and excavated. For excavation, even if there are buried objects such as water pipes and gas pipes in the ground, they can be excavated without damaging them (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent No. 2901733 gazette
[Problems to be solved by the invention]
By the way, the excavated earth and sand sucked by the suction cylinder is separated from the suction air flow from the suction hose connected to the suction cylinder through the earth and sand separation tank, and the suction air is exhausted from the suction device. There is a problem that the excavated earth and sand adheres and accumulates to block the suction hose.
[0006]
Before the clogging due to adhesion of excavated earth and sand, it is conceivable that cleaning water is supplied into the suction hose for cleaning, but it is necessary to use a large amount of water for removing the adhering earth and sand. New post-processing problems arise.
[0007]
Therefore, the present invention has been devised to solve the above problems, and when excavating the sediment with air, the excavated sediment attached to the suction hose or the like can be easily removed and a post-treatment of the washing water is required. An object of the present invention is to provide a soil excavation and suction device that does not.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a suction hose for excavation connected to a suction device is connected to an air excavator body, and the suction air and excavated earth and sand are separated in the middle of the suction hose for excavation. In the earth and sand excavation and suction device connected to the earth and sand separation tank, a washing suction hose is connected to the excavation suction hose so as to bypass the earth and sand separation tank, and washing water and suction air are supplied in the middle of the washing suction hose. Sediment excavation by connecting a washing water separation tank to be separated and connecting a washing water injection means for injecting the washing water separated in the washing water separation tank into the excavation suction hose on the air excavator body side or the air excavator body. It is a suction device.
[0009]
In the invention of claim 2, the washing water injection means includes a washing water recovery tank for introducing the washing water separated in the washing water separation tank, and a suction hose for excavation or an air excavator for washing the washing water in the washing water collection tank. The earth and sand excavation and suction device according to claim 1, comprising a washing water pump to be injected into the main body.
[0010]
According to a third aspect of the present invention, the air excavator main body comprises a suction cylinder connected to the excavation suction hose, and an excavation nozzle provided in the suction cylinder for injecting compressed air toward the ground. It is a soil excavation and suction device.
[0011]
The invention of claim 4 is the earth and sand excavation suction device according to any one of claims 1 to 3, wherein the downstream excavation suction hose and the cleaning suction hose are connected to the suction device via a filter.
[0012]
According to a fifth aspect of the present invention, the upstream excavation suction hose and the cleaning suction hose, and the downstream excavation suction hose and the cleaning suction hose are connected to an on-off valve for switching between excavation and cleaning, respectively. Item 5. The earth excavation and suction device according to any one of Items 1 to 4.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
[0014]
In FIG. 1, reference numeral 10 denotes an air excavator body, in which a excavation nozzle 12 that injects compressed air toward the ground A is provided in a cylindrical suction cylinder 11 having a quadrangular cross section (about 100 mm square). A brush member 13 that covers the gap with the ground A is provided and formed around the lower end.
[0015]
The excavation nozzle 12 is connected to a header 14 provided outside the suction cylinder 11, and compressed air 15 is supplied to the header 14.
[0016]
An excavation suction hose 16 having substantially the same diameter as the suction cylinder 11 is connected to the upper portion of the air excavator body 10, and the excavation suction hose 16 is sucked by a vacuum exhaust device or the like through a filter 17 such as a bag filter. Connected to device 18.
[0017]
In the middle of the excavation suction hose 16, a sediment separation tank 19 for separating the suction air and the excavated sediment is connected. That is, the upper part of the earth and sand separation tank 19 and the upper part of the suction cylinder 11 are connected by the upstream excavation suction hose 16a, and the top of the earth and sand separation tank 19 and the filter 17 are connected by the downstream excavation suction hose 16b. A soil separation tank 19 is connected to the excavation suction hose 16.
[0018]
The earth and sand separation tank 19 separates the suction air from the upstream excavation suction hose 16a and the excavation earth and sand s, stores the excavated earth and sand s in the earth and sand separation tank 19, and the suction air is used for downstream excavation from the top. Flow into suction hose 16b. In addition, a discharge valve 20 for discharging the excavated earth and sand s is provided at the bottom of the earth and sand separation tank 19.
[0019]
Excavation opening / closing valves 21a and 21b are connected to the upstream excavation suction hose 16a and the downstream excavation suction hose 16b, respectively.
[0020]
Now, a suction hose 22 for washing is connected to the excavation suction hose 16 so as to bypass the earth and sand separation tank 19, and a washing water separation tank for separating the washing water w and the suction air in the middle of the suction suction hose 22. 23 is connected. That is, the upstream cleaning suction hose 22a is branched from the upstream excavation suction hose 16a, and the other end of the upstream cleaning suction hose 22a is connected to the upper portion of the cleaning water separation tank 23 for cleaning. A downstream cleaning suction hose 22b is connected to the top of the water separation tank 23, and the other end of the downstream cleaning suction hose 22b is connected to join the downstream excavation suction hose 16b.
[0021]
Cleaning on-off valves 24a and 24b are connected to the upstream cleaning suction hose 22a and the downstream cleaning suction hose 22b, respectively.
[0022]
A cleaning water supply line 25 for supplying cleaning water w and an on-off valve 26 are connected to the cleaning water separation tank 23, and a ball tap 27 is provided in the cleaning water supply line 25 so that the cleaning water is filled to a predetermined liquid level. A discharge valve 28 is also provided for discharging the excavated sediment deposited on the bottom.
[0023]
Wash water injection for connecting the wash water separation tank 23 and the upstream excavation suction hose 16a on the air excavator body 10 side and injecting the wash water w separated in the wash water separation tank 23 into the upstream excavation suction hose 16a Means 30 are connected.
[0024]
This washing water injection means 30 injects the washing water recovery tank 31 for introducing the washing water w separated in the washing water separation tank 23 and the washing water w in the washing water collection tank 31 into the excavation suction hose 16a. A washing water pump 32 is provided.
[0025]
That is, a drain pipe 33 is connected to connect the washing water separation tank 23 and the washing water collection tank 31 and flow the washing water w in the washing water separation tank 23 to the washing water collection tank 31, and a valve 34 is connected to the drain pipe 33. Further, a suction pipe 35 for sucking the cleaning water w in the cleaning water recovery tank 31 is connected to the cleaning water pump 32, and a cleaning water injection pipe 36 is connected to the discharge side thereof.
[0026]
In the illustrated example, the cleaning water injection pipe 36 is connected to the upstream excavation suction hose 16 a near the air excavator body 10, but is connected to the upper portion of the suction cylinder 11 of the air excavator body 10. You may do it.
[0027]
Next, the operation of the present invention will be described.
[0028]
First, when excavating the ground A, the brush member 13 of the air excavator main body 10 is kept vertical so as to contact the ground A, and in this state, the compressed air 15 is directed from the excavation nozzle 12 toward the ground A. The compressed air 15 cuts the earth and sand, and at the same time, the suction device 18 generates a suction flow from the suction cylinder 11 so that the cut excavated earth and sand are sucked and used for upstream excavation. The excavated earth and sand s are separated from the suction air by the suction hose 16a, and the excavated earth and sand s are separated from the suction air. The suction air is exhausted from the suction apparatus 18 through the filter 17 from the downstream excavation suction hose 16b.
[0029]
In this air excavation, since the brush member 13 is provided at the lower end of the air excavator main body 10, the gap between the suction cylinder 11 and the ground A can be appropriately sealed, and the excavation earth and sand s can be satisfactorily sucked.
[0030]
During excavation, surface excavation is possible by attaching the air excavator body 10 to a shovel car (not shown) and moving the air excavator body 10 horizontally with respect to the excavation surface. At this time, even if the gap between the suction cylinder 11 and the ground A changes, the brush member 13 can be freely bent and seal the gap.
[0031]
During this suction excavation, excavation earth and sand adhere to the air excavator main body 10 and the excavation suction hose 16, and if this deposits, the excavation suction hose 16 is closed, so that it is not shown in the figure. The clogging state is monitored from the pressure of the suction hose 16 and the load of the suction device 18, and washing is performed to remove sediment adhesion.
[0032]
At the time of this cleaning, the excavation on / off valves 21a and 21b are closed from the open, the cleaning on / off valves 24a and 24b are closed to open, the suction air flow is switched to the cleaning suction hose 22, and the cleaning water is recovered. The washing water w in the tank 31 is pumped up by the washing water pump 32 and injected into the upstream excavation suction hose 16 a or the suction cylinder 11 through the washing water injection pipe 36. By the injection of the washing water w, the earth and sand adhering in the upstream excavation suction hose 16a is washed away by the washing water and the suction air and introduced into the washing water separation tank 23 from the upstream washing suction hose 22a. And the cleaning water are separated from the suction air, and the suction air is exhausted from the downstream cleaning suction hose 22b by the filter 17 and the suction device 18.
[0033]
The washing water and earth and sand collected in the washing water separation tank 23 are accumulated on the bottom of the excavated earth and sand settled and separated in the washing water separation tank 23, and the washing water w as a supernatant is supplied to the washing water collection tank 31 again. Repeatedly used.
[0034]
Thus, since the washing water w in the washing water separation tank 23 is repeatedly used for washing, post-treatment of the washing water after washing is not required. Further, since the washing water and the earth and sand are settled and separated in the washing water separation tank 23 and only the washing water w is circulated in a closed cycle, a relatively small capacity of the washing water separation tank 23 is sufficient.
[0035]
In this embodiment, the cleaning water w in the cleaning water separation tank 23 is supplied to the cleaning water recovery tank 31, and then the cleaning water w is injected into the excavation suction hose 16 by the cleaning water pump 32. As described above, this is to prevent the excavated earth and sand from flowing into the washing water pump 32 as much as possible. You may make it inject | pour.
[0036]
If the excavated earth and sand accumulates in the washing water separation tank 23 to some extent, the discharge valve 28 is opened and discharged, and the discharged water is replenished with the washing water w from the washing water line 25.
[0037]
In the above-described embodiment, the earth and sand adhering to the excavation suction hose 16 is described as being washed and removed. However, the present invention is not limited to excavation earth and sand, but is used for washing a powder suction hose that can be sucked and transferred. Of course, the powder at this time is also included in the scope of the excavated sediment of the present invention.
[0038]
【The invention's effect】
In summary, according to the present invention, when the earth and sand adhering to the excavation suction hose and the like are washed with the washing water, an excellent effect is exhibited that the washing water can be repeatedly used without being disposable.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Air excavator main body 16 Excavation suction hose 18 Suction device 19 Sediment separation tank 22 Washing suction hose 23 Washing water separation tank 30 Washing water injection means 32 Washing water pump

Claims (5)

In the earth and sand excavation and suction device, the excavation suction hose connected to the suction device is connected to the main body of the air excavator, and the earth and sand excavation and suction device in which the suction air and the excavation sediment are separated in the middle of the excavation suction hose. A suction hose for cleaning is connected to the suction hose for bypassing the earth and sand separation tank, and a cleaning water separation tank for separating the cleaning water and suction air is connected to the suction hose for cleaning, and the air excavator A soil excavation and suction device, wherein a cleaning water injection means for injecting cleaning water separated in a cleaning water separation tank is connected to a suction hose for excavation on the main body side or an air excavator main body. The cleaning water injection means includes a cleaning water recovery tank for introducing the cleaning water separated in the cleaning water separation tank, and a cleaning water pump for injecting the cleaning water in the cleaning water recovery tank into the excavation suction hose or the air excavator main body. The earth and sand excavation and suction device according to claim 1. The sediment excavation and suction device according to claim 1 or 2, wherein the main body of the air excavator comprises a suction cylinder connected to a suction hose for excavation, and a drilling nozzle provided in the suction cylinder and jetting compressed air toward the ground. The sediment excavation and suction device according to any one of claims 1 to 3, wherein the downstream suction hose and the suction suction hose are connected to the suction device through a filter. 5. An on-off valve for switching between excavation and cleaning is connected to the upstream excavation suction hose and cleaning suction hose, and the downstream excavation suction hose and cleaning suction hose, respectively. Sediment excavation and suction device as described.

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