JPH033776B2 - - 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, dirt adheres and accumulates on the inner wall of the vacuum hose due to its moisture and viscosity, impeding 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 connects the vacuum hose to the hose connection port of the collection chamber from which it is led out to form two branch ports in the collection chamber, one branch port serving as a discharge port for the collected soil, and the other branch port serving as a discharge port for the collected soil. The branch port extends so as to communicate with the outside of the collection chamber, and a flexible wire having a hose cleaning brush is led out to the outside airtightly from the open end of the extension part. It is characterized by:

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 box 7 having a dirt collection chamber 5 and a filter chamber 6 inside is mounted on 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 provided with an inwardly extending portion 11a that extends diagonally upward in the collection chamber 5, and a branch port portion 11b that branches from this inwardly extending portion 11a. The inwardly extending portion 11a communicates with the outdoors, and a flexible wire 31 having brush bristles 30 radially implanted at the tip thereof is inserted from the outside. A sealing material 32 is provided inside the outer end of the extending portion 11a to seal the lead-out end of the wire 31. Further, the branch port 11b serves as a discharge port for suctioned earth and sand, and is located between the branch port 11b and the top opening 8a of the passage 8. A collision plate 14 stretched diagonally is arranged. 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. has been 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. The support plate 24 also includes a filter chamber 6.
A large number of holes 24 are provided to prevent air circulation within the
A is worn.

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, so that the suction nozzle 12a at the tip of the hose 12 When facing the area to be excavated and discharged, the excavated earth and sand are sucked up together with air and drawn into the collection chamber 5 through the branch port 11b through the hose 12.

When the soil 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 soil, 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
The fine dust is then separated by a filter element in the filter chamber 6 and drawn to the blower 3 via the duct 28.

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 to and accumulates on the inner wall of the vacuum hose 12, but in this case, the extension portion 11a provided extending from the outside of the collection chamber 5 to the hose connection port 11 Insert the flexible wire 31 into the vacuum hose 12 through the hose connection port 11, and move the brush bristles 30 back and forth in the same way as when cleaning a chimney.
Perform internal 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 30 move.

When brushing is finished, brush bristles 3 again.
The flexible wire 31 including 0 is connected to the extending portion 11a.
Then, the suction power is used again to suck and remove the earth and sand.

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 negative pressure suction force from the blower and sucked into the collection chamber through the hose, which is connected to the hose connection port of the collection chamber from which the vacuum hose is led out,
Two branch ports are formed in the collection chamber, one branch port serves as a discharge port for the collected sediment, and the other branch port extends so as to communicate with the outside of the collection chamber, and a hose is connected to the extension portion. The flexible wire with a cleaning brush is airtightly led out from the open end of the extension, so when a clog occurs in the vacuum hose, there is no need to remove the vacuum hose from the collection chamber and clean the inside of the collection chamber. Work can be temporarily interrupted from outside the room and the brush can be quickly inserted into the hose for cleaning. Cleaning residue is also sucked into the collection room, resulting in a significant reduction in work stoppage time. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the entire device showing an embodiment of the present invention, Fig. 2 is an enlarged longitudinal side view of the filter element, and Fig. 3 is an enlarged longitudinal side view of the main part, the vacuum hose connection part. It is a diagram. 1...Bolly body, 2...Engine, 3...Blower, 4...
Coupling, 5...Collection chamber, 6...Filter chamber, 7
...Vacuum box, 8...Passway, 8a...Top opening, 8b...
Bottom communication port, 9, 10... Partition wall, 11... Hose connection port, 11a... Extension part, 11b... Branch port part, 12...
Vacuum hose, 12a... Suction nozzle, 13...
Coil spring, 14... Collision plate, 15... Impact buffer, 16... Soil discharge port, 17... Door, 18... Sealing material, 19... Piston rod, 20... Piston.
Cylinder mechanism, 21... Filter element, 21a... Engagement flange, 21b... Cap, 21c... Back,
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, 3
0... Brush hair, 31... Flexible wire, 32
...Sealing material.

Claims (1)

[Claims] 1. A collection chamber that collects sediment through a vacuum hose, a filter chamber that communicates the two, 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 earth and sand from the tip of a vacuum hose and sucks it into a collection chamber through the hose, two branch ports are formed in the collection chamber continuous to the hose connection port of the collection chamber from which the vacuum hose is led out, and one branch port is is a discharge port for the collected soil, and the other branch port extends so as to communicate with the outside of the collection chamber, and a flexible wire having a hose cleaning brush is connected to the open end of the extending portion. A vacuum soil removal device that is characterized by being able to discharge soil to the outside in a more airtight manner.