JPS6317977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum soil removal device used for digging up soil mainly when installing or repairing underground pipes.

This type of vacuum earth removal device is equipped with a collection chamber for collecting earth and sand via a vacuum hose and a filter chamber, and the two chambers are communicated with each other so that the negative pressure suction force from the vacuum suction blower is transmitted to the filter chamber. The filter is configured to extend to the collection chamber through a filter, and when the collected soil from the vacuum hose enters the collection chamber, the dynamic pressure decreases and the air and soil are separated, and the soil is deposited in the collection chamber. It is necessary to adopt a configuration in which only fine dust is brought into the filter chamber together with air, and the fine dust is separated and removed by the filter.

A vacuum soil evacuation device with such a configuration is capable of sucking up soil by extending a vacuum hose led out from the collection chamber toward the excavation site, and placing the suction port at the end of the hose facing the soil layer to be excavated and discharged. The soil is sucked and discharged into a hose,
During work, inside the vacuum hose, dirt adheres to and accumulates on the inner wall due to the moisture and viscosity of the dirt.
hinders circulation.

SUMMARY OF THE INVENTION In view of the above-mentioned disadvantages, it is an object of the present invention to provide a vacuum soil evacuation device that is devised so that the inside of a vacuum hose can be easily cleaned from the outside.

For this purpose, the present invention provides an insertion tube for a hose cleaning brush in the collection chamber, facing the hose connection port of the collection chamber from which the vacuum hose is led out, so as to direct the hose cleaning brush from outside the collection chamber to the hose connection port. The present invention is characterized in that, when not in operation, a brush is inserted into the vacuum hose from outside the collection chamber through the insertion tube to clean the inside of the hose.

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

FIG. 1 is a vertical sectional side view of the entire vacuum earth removal device according to the present invention, and the reference numeral 1 in the figure is a towed truck body;
This is equipped with a diesel engine 2 and a large vacuum suction blower 3 driven by the engine, which are connected for power via a coupling ring 4. Further, a vacuum enclosure 7 having a dirt collection chamber 5 and a filter chamber 6 therein is mounted at the rear of the truck body 1. The collection chamber 5 and the filter chamber 6 are divided into front and rear sections via a passage 8, and the passage 8 is formed by a partition wall 9 on the collection chamber 5 side and a partition wall 10 on the filter chamber 6 side. It communicates with the chamber 5 through its top opening 8a, and with the filter chamber 6 through its bottom communication port 8b.

A connection port 11 for a vacuum hose 12 is opened in the upper part of the rear wall of the collection chamber 5, one end of the vacuum hose 12 is connected to the connection port 11, and the other end of the vacuum hose 12 is extended to the excavation site. A dirt suction nozzle 12a is provided at the tip.

As is clear from FIG. 3, the connection port 11 of the vacuum hose is oriented obliquely upward in the collection chamber 5, and an insertion tube 30 communicating with the outside is provided in the collection chamber 5 opposite to this opening. It is provided. Inside the insertion tube 30, there are brush bristles 3 at the tip.
Flexible wire 31 with 1a installed radially
can be inserted from the outside, and a lid 33 with a rubber plate 33a that can be opened and closed by operating a control wire 32 from the outside is pivotally attached to the inner end of the insertion tube 30. In addition, this insertion tube 3
0, the hose connection port 11
and the top opening 8a of the passageway 8,
A coil spring 13 is installed in the upper part of the collection chamber 5.
A collision plate 14 is arranged diagonally. A shock absorber 15 such as a rubber plate is attached to the collision plate 14 on the side facing the internal opening of the hose connection port 11 .

In addition, a dirt discharge port 16 is opened at the bottom of the collection chamber 5, and an opening/closing door 17 that is opened and closed by hydraulic pressure or pneumatic pressure is arranged here so as to be able to move back and forth. A sealing material 18 is installed around the soil discharge port 16 to maintain airtightness around the opening/closing door 17. And the above opening/closing door 1
A piston rod 19 is connected to the side of the piston 7, and the piston rod 19 is connected to a piston (not shown) of a piston-cylinder mechanism 20 by hydraulic or pneumatic pressure.

On the other hand, the filter chamber 6 has a large number of bottomed cylindrical filter elements 21 disposed therein.
As shown in an enlarged view in FIG. 2, the filter element 21 includes a cap 21b having an engaging flange 21a at the top, and an upper opening of a bottomed cylindrical bag 21c made of cloth is fixed to the cap 21b. A coiled bone member 21d is inserted inside the bag 21c to maintain its shape. The filter element 21 is inserted from the suction side to the suction side through a large number of mounting holes 22a provided in a partition wall plate 22 that partitions the filter chamber 6 into a suction side and a suction side, and is supported by a flange 21a. be done. A support plate 24 is provided at the bottom of the filter chamber 6 and is pulled downward by a spring 23, and the bottom of the filter element 21 is fixed to this plate with bolts and nuts 26 via washers 25. has been done. Further, the support plate 24 is provided with a large number of through holes 24a so as not to obstruct air circulation within the filter chamber 6.

Furthermore, a relief valve 27 is provided at the top of the filter chamber 6 to prevent external air from flowing in and creating an ultra-vacuum when the negative pressure exceeds a certain level. Further, the suction side of the blower 3 is communicated with the suction side chamber formed above the partition wall plate 22 via a duct 28. Further, a gate 29 that can be opened and closed manually is provided at the bottom of the filter chamber 6, so that fine dust that has fallen within the filter chamber 6 can be removed as appropriate.

In such a configuration, when the engine 2 is started, vacuum negative pressure is applied to the filter chamber 6 and the collection chamber 5 by the action of the blower 3, and the vacuum suction force is applied to the vacuum hose 12.
When the excavated earth and sand are placed in front of the area to be excavated and removed, the excavated earth and sand are sucked up together with air and drawn into the collection chamber 5 through the hose 12.

When the sediment sucked in this way enters the collection chamber 5, it hits the collision plate 14, and due to the drop in dynamic pressure within the collection chamber 5, the sediment, water droplets, etc. with large specific gravity are removed from the collection chamber 5.
Collects at the bottom of the inside. On the other hand, the air containing fine dust detours around the collision plate 14 and passes through the top opening 8a of the passage 8.
From there, via the passage 8, the bottom communication port 8b
filter element 2 in the filter chamber 6.
1, the fine dust is separated, and the duct 28
It is drawn to the blower 3 via the.

Then, a signal is applied manually or by an appropriate means at an appropriate period to control the piston/cylinder mechanism 20.
The door 17 is operated horizontally via the piston rod 19, the soil discharge port 16 is opened, and the accumulated soil accumulated at the bottom of the collection chamber 5 is discharged downward, and then the door 17 is immediately opened. Close.

In the above-mentioned suction soil removal work, soil adheres and accumulates on the inner wall of the vacuum hose 12, but in this case, the output of the blower 3 is temporarily lowered, the lid body 33 is opened, and the collection chamber 5 is removed. Insert the flexible wire 31 from the outside through the insertion tube 30, insert the wire 31 into the vacuum hose 12 from the hose connection port 11, and move the brush bristles 31a back and forth into the vacuum hose 12 in the same manner as when cleaning a chimney. Do some brushing. The dirt peeled off from the inner wall of the hose is gradually carried into the collection chamber 5 by the suction force applied by the blower 3 as the brush bristles 31a move.

When brushing is finished, brush bristles 3 again.
The flexible wire 31 including 1a is inserted through the tube 30.
Then, the lid 33 is closed, the output of the blower 3 is increased, and the suction force is used to suck and remove the earth and sand again.

As detailed above, the present invention includes a collection chamber that collects sediment through a vacuum hose, a filter chamber that communicates with the collection chamber, and a blower that applies a negative pressure suction force to the collection chamber through the filter chamber. , in which soil is sucked from the tip of the vacuum hose by the negative pressure suction force from the blower and sucked into the collection chamber through the hose, facing the hose connection port of the collection chamber from which the vacuum hose is led out,
An insertion tube for a hose cleaning brush is provided in the collection chamber so that it is directed from the outside of the collection chamber to the hose connection port, and when the brush is not being used, the brush is inserted into the vacuum hose from outside the collection chamber through the insertion tube to clean the hose. Since the interior can be cleaned, when a clog occurs in the vacuum hose, there is no need to remove the vacuum hose from the collection chamber and clean the interior, and you can temporarily stop work from outside the collection chamber and quickly clean the brush. It can be put into a hose for cleaning, and the cleaning residue is sucked into the collection chamber, resulting in a significant reduction in work interruption time.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of the entire device showing one embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional side view showing a filter element, and Fig. 3 is an enlarged longitudinal sectional side view of the main part, the vacuum hose connection part. It is a diagram. 1... Truck body, 2... Engine, 3... Blower, 4... Coupling, 5... Collection chamber, 6...
Filter chamber, 7... Vacuum enclosure, 8... Passage, 8a
...Top opening, 8b...Bottom connection port, 9,10...
...Partition wall, 11... Connection port, 12... Vacuum hose, 12a... Suction nozzle, 13... Coil spring, 14... Collision plate, 15... Impact buffer, 16... Soil discharge port, 17... Opening/closing Door, 18...
Seal material, 19... Piston rod, 20... Piston/cylinder mechanism, 21... Filter element,
21a... Engagement flange, 21b... Cap, 2
1c...Bug, 21d...Bone member, 22...Partition plate, 22a...Mounting hole, 23...Spring,
24... Support plate, 24a... Through hole, 25... Washer, 26... Bolt/nut, 27... Relief valve, 28... Duct, 29... Gate, 30...
Insertion tube, 31... Flexible wire, 32...
Control wire, 31a...Brush bristles, 33
...Lid body.

Claims (1)

[Claims] 1 Equipped with a collection chamber that collects sediment through a vacuum hose, a filter chamber communicating with the collection chamber, and a blower that applies negative pressure suction force to the collection chamber through the filter chamber, and uses the negative pressure suction force from the blower to In a device that sucks sediment from the tip of a vacuum hose and sucks it into the collection chamber through the hose, the vacuum hose is directed into the collection chamber from outside the collection chamber toward the hose connection port, facing the hose connection port of the collection chamber from which the vacuum hose is led out. An insertion tube for a vacuum hose cleaning brush is provided, and the inside of the hose can be cleaned by inserting the brush into the vacuum hose from outside the collection chamber through the insertion tube during non-operation. Vacuum soil removal equipment.