DE3325476A1 - EXCAVATOR DEVICE - Google Patents

Description

The invention relates to a dredging device for dredging work in rivers, for pumping sand from the bottom of a Body of water, for dumping sediment or mud and sand and for digging earth.

In conventional dredging work in construction, a support structure or a tower is used to hold the dredging device arranged at the workplace. An underwater device such as an underwater pump or an underwater agitation pump is suspended from the supporting structure and let into the water, while a Power source for driving the underwater equipment is arranged on the bottom.

However, if the / digging work in a large area is carried out, the position of the underwater equipment must be changed frequently in the water, so that the The supporting structure or the tower to which the underwater facility is attached, dismantled and relocated or needs to be moved to a new job to be rebuilt; the power source to the The drive of the underwater device must then also be shifted or moved into the new working position. As a result, it takes a considerable long time to restore the underwater equipment. The dredging often has to be interrupted, which makes the dredging process very uneconomical.

For conventional excavation work, a mobile hydraulic one is used Backhoe or shovel used to dig the mud and sand with the help of a bucket or Pull up the bucket attached to the end of the arm. However, when the water is in the dug pit remains, or if the mud and sand that has settled in the waterway is dredged up, that is Conveying work with the help of the bucket due to the available water inefficient or uneconomical.

It is therefore an object of the invention to provide a wheeled excavator device which can be easily attached to any Job can be driven to improve job performance.

Another object of the invention is to provide a wheeled dredging device which is an underwater device can move together with the excavator device to a job in order to increase the work performance raise.

Another object of the invention is to provide a wheeled excavator device which can be used in any Work area can be dredged without an electric power supply source or a hydraulic supply source to need.

Embodiments of the invention are based on the Drawing explained. Show it:

1 shows a side view of an excavator device according to the invention,

Fig. 2 is a diagram of the begc in the excavator device used hydraulic circuit,

and

Fig. 3 is a cross section through the lower part of a

Underwater pump equipped with a propeller.

δ An excavator device A according to the invention is shown in FIG. 1 shown. The device consists of a hydraulic backhoe 1, which is usually used as a mobile Caterpillar is used for engineering work, and from an underwater facility such as a Underwater pump 3 which is detachably attached to the front end of an arm 2 of the excavator 1. Instead of the underwater pump 3 An underwater agitation pump can be used if necessary. The underwater pump 3 has an impeller 3a, which is attached to the lower end of an output shaft of a built-in hydraulic motor (not shown) attached near the lower opening. The underwater pump 3 is received in a housing 3b, which with a suction hose 3c is connected. Due to the suction force generated by the rotation of the impeller 3a, a liquid mixture of sand and water is sucked under pressure into the housing 3b and is then released from the housing 3b directed to the suction hose 3c. The submersible pump is driven by a known hydraulic drive device driven.

The hydraulic excavator 1 is equipped with a hydraulic drive device for driving the caterpillars 4, for rotating a turntable horizontally and vertically Swiveling the arm 4 equipped. The hydraulic drive device has a hydraulic pump which is driven by an engine E. When the hydraulic Pressure is applied to the hydraulic cylinders 5, 6, 7 the articulated arm tilted. Then, the excavator 1 is rotated by the turntable to rotate the arm 2.

The underwater pump 3 uses the hydraulic type mentioned above Drive device for the hydraulic excavator 1 as a hydraulic drive device.

The hydraulic circuit of the hydraulic device is shown schematically in FIG. It has a hydraulic circuit for driving the hydraulic excavator 1 and another hydraulic circuit for driving the underwater pump 3. A first and a second pump P, P ″ are operated by a motor E. T denotes an oil tank and M, NL, M-, M denotes a caterpillar drive motor on one side, a crawler motor on the other, an excavator rotary motor and an underwater pump drive motor. The submersible pump drive motor M is connected to the hydraulic circuit which the second hydraulic pump P 1 has. However, it can be connected to any other element, for example to the hydraulic circuit which has the caterpillar drive motor M. A directional control valve V is connected to the underwater pump 3 via the oil supply and the return lines T _{1, T ″.}

The upper end of the underwater pump 3 is connected to the front end of the arm 2 via a pivot or pivot pin 10 tied together. An opening in which a pivot or pivot pin is provided for pivoting a bucket used to attach the underwater pump 3.

A connecting rod R connects the pivot or pivot pin 10 with a piston rod of a hydraulic cylinder 7 through which the underwater pump 3 at the front end of the arm 2 can be pivoted. The supply and return lines T _1, T .. for supplying and discharging the oil pressure to and from the Untcrwdoserpumpe 3 are provided along one side of the arm. 1 One end of the lines is connected to an oil inlet 3d and an oil outlet, respectively

-Ί-

and the other end is connected to an oil chamber of the hydraulic excavator 1, respectively. This feed and Return lines T., T ^ consist of elastic Hoses in order to be able to follow the pivoting movements of the arm 2.

In the excavation operation of the work machine A, the motor E is driven to bring the hydraulic excavator 1 to its place of work to bring and the hydraulic cylinders 5, 6,7 are operated simultaneously or separately to the Tilt arm 2, whereby the underwater pump 3 is brought into the water.

When the underwater pump 3 is driven by the directional control valve V after being lowered into the water, becomes the sand or mud below and around the submersible pump 3 due to the rotation of the impeller 3a mixed with water to form a pumpable mass, and this mass is conveyed through the hose 3c to the surface of the earth. Then the arm 2 is tilted and pivoted over the turntable in the horizontal direction in order to move the underwater pump 3 into a different position bring to continue the dredging work. Such displacement of the underwater pump 3 is within the maximum turning radius of arm 2 possible.

The hydraulic excavator 1 can also move easily are to bring the submersible pump 3 to the desired excavation position, so that the dredging work in one wide range can be carried out

An agitator blade 3g is attached to the lower end of the output shaft 3f of the submersible pump 3 (Fig. 3) to keep the sludge or stir up sand and water. This agitator blade 3g gc improves the pumping capacity of the external water pump 3.

If a jet nozzle is arranged in the door water purape 3: is to use the mud and sand around the pump Mixing water further increases the performance of the pump operation.

Although in the embodiment shown the hydraulic Excavator 1 is shown as a chassis or a mobile carriage, a truck or a tractor can also be used, if this with an articulated arm and the hydraulic drive device for driving the submersible pump, and a bulldozer, a truck crane and a Post driver or crawler crane can be used without an independent hydraulic power source to drive the Submersible pump is provided when it is provided with the hydraulic drive system.

According to the invention, the lowered position of the underwater pump Can be changed at will and a support structure or a tower to attach the underwater pump is not required, making the dredging work more powerful can be carried out in a wider area. The hydraulic drive device of the underwater pump is connected to the hydraulic drive device of the chassis or the mobile car, so that the The submersible pump can be set down and driven in any work area without having its own electrical Drive supply source or hydraulic supply source is required.

Claims (4)

Patent Attorneys European Patent Attorneys Dr. W. Müller-Bore f Dr. Müller-Born and Partner ■ POB 20 OE 47 · D -8000 Mündion 28 Dipl.-Phys. Dr. Lazy Deufel Dipl.-Chem., Dipl.-Wirtsdi.-Ing. Dr. Alfred Schön Dipl.-Chem. Werner Hertel Dietrich Lewald Dipl.-Ing. Dr.-Ing. Dieter Otto Dipl.-Ing. Ot / sc T 1564 TOYO DENKI KOGYOSHO COMPANY, Ltd. Fukuoka-ken / Japan Excavator device Ansprü che 5 1. Excavator device ₍ marked by a) a chassis or a mobile wagon, b) one on the chassis or the mobile carriage '' solid articulated arm, D-8000 Munich 2 POB 26 02 47 Cable: Telephone Telecopier Infotcc (3400 B Telex Isartorplatz 6 D-8000 Munich 26 Muubopat 089/2214 83-7 GII + III (089) 22 96 43 5-24 285 _ ο c) a hydraulic underwater device at the front end or in the middle of the arm, and d) a hydraulic drive device for driving the hydraulic underwater device, wherein the hydraulic drive device is arranged on the chassis or the mobile carriage. 2. Excavator device according to claim 1, characterized in that that the chassis or the mobile carriage is a crawler track, which is driven by a hydraulic drive device is driven. 3. Excavator device according to claim 1, characterized in that that the chassis or the mobile carriage has a turntable which is driven by the hydraulic drive device, which is arranged on the chassis or the mobile carriage is driven by the articulated arm the hydraulic drive device attached to the turntable is tiltable or pivotable and stretchable and that the hydraulic drive device of the hydraulic underwater device with a hydraulic drive device for the turntable and the arm is connected. 4. Excavator device according to claim 3, characterized in that the chassis or the mobile carriage is a mobile mechanical engineering structure.