CN115490095A - Method for operating an engineering machine and an engineering machine - Google Patents

Method for operating an engineering machine and an engineering machine Download PDF

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Publication number
CN115490095A
CN115490095A CN202210684607.0A CN202210684607A CN115490095A CN 115490095 A CN115490095 A CN 115490095A CN 202210684607 A CN202210684607 A CN 202210684607A CN 115490095 A CN115490095 A CN 115490095A
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CN
China
Prior art keywords
hydraulic
hose
pressure
hydraulic hose
working
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210684607.0A
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Chinese (zh)
Inventor
J·塞德尔迈尔
L·艾比施
A·胡格尔
M·K·霍尔曼
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Bauer Maschinen GmbH
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Bauer Maschinen GmbH
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Filing date
Publication date
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Publication of CN115490095A publication Critical patent/CN115490095A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/40—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable
    • B65H75/42—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles
    • B65H75/425—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles attached to, or forming part of a vehicle, e.g. truck, trailer, vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • B65H75/4478—Constructional details relating to handling of fluids
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/47—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets
    • E02F3/475—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets for making foundation slots
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/025—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with scraper-buckets, dippers or shovels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275—Hoses and supports therefor and protection therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/112—Section geometry
    • B65H2701/1121—Section geometry shape
    • B65H2701/11214—Section geometry shape tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/33—Hollow or hose-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/35—Ropes, lines

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

The invention relates to a method for operating a working machine and a working machine having a hydraulically operated working implement, wherein the working implement is supplied with hydraulic fluid via at least one hydraulic hose, which can receive a high first pressure and at least one low second pressure, which is lower than the first pressure, depending on the operation, wherein the at least one hydraulic hose is at least partially wound on a rotatable hose reel and unwound from the hose reel and wound onto the hose reel again as a function of a displacement movement of the working implement. Furthermore, a control unit is provided according to the invention, which, independently of the operation of the work implement, controls the pressure of the hydraulic fluid in the at least one hydraulic hose in such a way that a predetermined minimum pressure prevails in the hydraulic hose when the at least one hydraulic hose is wound onto the hose reel.

Description

Method for operating an engineering machine and an engineering machine
Technical Field
The invention relates to a method for operating a working machine having a hydraulically operated working implement, in which the working implement is supplied with hydraulic fluid via at least one hydraulic hose, which, depending on the operation, can receive a high first pressure and at least one low second pressure, which is lower than the first pressure, wherein the at least one hydraulic hose is at least partially wound on a rotatable hose reel and is unwound from the hose reel and wound onto the hose reel again in accordance with a displacement movement of the working implement, according to the preamble of claim 1.
The invention further relates to a working machine, in particular an underground working machine, having a hydraulically operated working implement which can be supplied with hydraulic fluid via at least one hydraulic hose which, depending on the operation, can receive a high first pressure and at least one low second pressure which is lower than the first pressure, wherein the at least one hydraulic hose is at least partially wound on at least one rotatable hose reel and can be unwound from the hose reel and wound onto the hose reel again as a function of a displacement movement of the working implement, according to the preamble of claim 7.
Background
Such a working machine is known, for example, from EP 1 950 353 B1. The work machine is a load carrier, at which a slotted wall grab (schlitzwandgreeifer) is vertically adjustably arranged. A grab bucket (Greiferschaufeln) of a slotted wall grab, which is embodied as a hydraulic grab, can be hydraulically operated there. For the hydraulic supply, a rotatable hose reel is supported on the support, wherein the hydraulic hose can be traced via the hose reel to the trench wall grab.
For opening and closing the grapple bucket one or more hydraulic cylinders may be provided which are operated alternately for opening and closing. If the grapple bucket is closed here, the so-called closed side of the hydraulic cylinder is loaded with high pressure via a hydraulic hose to keep the bucket closed, while the open side is switched to be pressureless. For opening, a pressure reversal is carried out, wherein the opening side is then acted upon with high pressure via the hydraulic hose, while the closing side and the hydraulic hose connected thereto are switched to pressureless.
To contain the ground material, the grapple with the grab bucket opened is moved down onto the ground. By closing the grapple bucket, the ground material is contained and then the slotted wall grapple can be pulled out of the ground again still upwards with the closed grapple bucket with the contained ground material and deflected into a transverse position. During the respective displacement movement, the associated hydraulic hose is unwound from the hose reel or rewound onto the respective hose reel.
Depending on the adjustment direction and the open or closed state of the grab bucket, the hydraulic hose can be loaded with high pressure or switched to pressureless in this unwound or wound condition. In the case of loading and releasing pressure, shape changes may occur at the hydraulic hose. Here, the pressure variation may be a few 10 bar and even over 100 bar. In the case of long-term operation, damage to the hydraulic hose and even to the hose reel can occur.
Disclosure of Invention
The object of the present invention is to provide a method and a construction machine with which a more protected operation of hydraulic hoses and hose reels can be achieved.
This object is achieved, on the one hand, by a method having the features of claim 1 and, on the other hand, by a working machine having the features of claim 7. Preferred embodiments of the invention are given in the respective dependent claims.
The method according to the invention is characterized in that a control device is provided which, independently of the operation of the work apparatus, controls the pressure of the hydraulic fluid in the at least one hydraulic hose in such a way that a predetermined minimum pressure prevails in the hydraulic hose when the at least one hydraulic hose is wound onto the hose reel.
The basic idea of the invention is to ensure that a sufficient minimum pressure prevails in the hydraulic hose when the hydraulic hose is wound up, independently of the mode of operation of the work apparatus. The hydraulic hose (which must have a certain flexibility) is not rolled up here in the pressureless state. In contrast, it is ensured by a minimum pressure that the hydraulic hose maintains a generally substantially circular cross-sectional shape and a substantially constant length in the wound state.
The invention is based on the knowledge that, in the case of a loaded pressure, a hydraulic hose increases its cross section. At the same time, this increase in section or diameter results in a significant reduction in the length of the hydraulic hose. In the case of a rolled-up hydraulic hose, a "shrinking" effect can then occur, in which the individual windings on the hose reel are shrunk together. The outer hose winding can be pressed here between the inner hose windings. This can damage the hose wall. Furthermore, high compressive forces can be applied to the hose reel and in particular to the side walls and hub of the hose reel. The hose reel can here be deformed or even destroyed in an undesirable manner.
To overcome this, a minimum pressure of from a few bar to over 100 bar can be provided, which is preferably significantly lower than the working pressure for the working implement. The minimum pressure may be less than or equal to the working pressure or even higher. The problem of shrinkage of the rolled up hydraulic hose is thus prevented or at least reduced in the event of a loading pressure. Mechanical overloading of the hose and/or hose reel associated therewith can thus be avoided.
A preferred embodiment of the invention provides that, in the case of a wound hydraulic hose, the pressure of the hydraulic fluid in the hydraulic hose is increased by the control unit to a minimum pressure, when the hydraulic fluid has a low second pressure, and the predetermined minimum pressure lies between the high first pressure and the low second pressure. The low second pressure is preferably a pressure-free state, in which in particular an ambient pressure or a pressure value close to the ambient pressure is present. The high first pressure is in particular a working pressure required for operating a work implement, which is required for example for operating a hydraulic cylinder or a hydraulic drive. The high first pressure, which is in particular the working pressure, may be several tens of bar and up to over 100 bar.
The minimum pressure required depends on the size and type of the hydraulic hose, the size of the hose reel and the number of possible windings on the hose reel, and the working pressure that can be expected from it. The minimum pressure is preferably a few bar higher than the second, lower pressure, and may preferably also be in the range of the working pressure or a few bar lower than it. The minimum pressure ensures that the internal pressure in the hydraulic hose in the wound state is so great that the flexible hydraulic hose in principle substantially retains its cross-sectional shape and thus substantially the same length in the wound state. Thereby, the problem of shrinkage is overcome from the beginning.
In principle, the setting of the minimum pressure can be carried out in any suitable manner. The development according to the invention is particularly advantageous if the hydraulic unit and/or the valve arrangement for setting the minimum pressure is actuated by the control unit. In particular, the controllable non-return valve and/or the throttle valve can be arranged upstream and/or downstream of the hydraulic hose.
By means of the control unit, the pressure from the hydraulic aggregate, in particular the hydraulic pump, can then be supplied to the hydraulic hose with a minimum pressure in the case of a wound hydraulic hose. Alternatively or additionally, the check valve and/or the throttle at the transition to the work implement is/are provided such that an undesired activation of the hydraulic actuator or the hydraulic drive at the work implement is prevented by the minimum pressure thereof by the hydraulic fluid. In principle, however, the minimum pressure can also be designed so low that operation of the hydraulic components at the work apparatus is not caused thereby even without the check valve.
According to one embodiment of the invention, it is advantageous for reliable operation to provide at least one sensor device which detects the pressure in the at least one hydraulic hose, the winding movement of the hose reel and/or the operating state of the work apparatus. The sensor device is connected to the controller in such a way that the operating state of the construction machine, in particular for winding the hydraulic hose, is reliably detected by the controller. The controller may automatically cause loading at a minimum pressure. Alternatively, it may be manually prompted by an operator.
For example, if it is determined that the closing of the grapple bucket in a slotted wall grapple occurs before the raising of the slotted wall grapple and thereby the winding of the hydraulic hose, then the setting of the minimum pressure can be made by the controller, in particular when the grapple bucket has been closed. In principle, the setting of the minimum pressure in the hydraulic hose is prompted by the controller at a specific hose reel, in which case a winding movement is introduced onto the hose reel if a pressure-free or excessively low pressure state in the hydraulic hose is determined via the pressure sensor. For this purpose, a corresponding sensor can be provided at the hose reel or at the drive for rotating the hose reel. The detection of the pressure can be reliably detected via a corresponding pressure sensor in the hydraulic hose or in the feed line for the hydraulic hose.
In principle, any work implement, which is operated hydraulically via a rollable and extendable hydraulic hose, can be used according to the invention for a working machine. In accordance with an embodiment variant of the invention, it is particularly advantageous if the working device is designed for processing the ground and in particular a drilling device, a grab bucket, a milling cutter, a vibrator or an impact unit is used. The drilling device can have a drilling drive, in particular, which is designed with a drilling tool for creating a drilled hole in the ground in a material-removing or displacement manner, wherein a tracked change in position with a hydraulic hose is required.
It is particularly advantageous to use a grab as a work apparatus, wherein the grab is preferably configured as a slotted wall grab for establishing a slot in the ground for a slotted wall section or a slotted wall. Here, the grapple may have one or more hydraulic cylinders for opening and closing the grapple bucket. Furthermore, additional hydraulic drive assemblies, such as rotary drives or adjustment cylinders for rotating the grapple about its longitudinal axis, may be provided.
Furthermore, a milling cutter, in particular a slot wall milling cutter, can be provided, which in particular has a plurality of milling cutter wheels driven via a hydraulic rotary drive. Furthermore, a vibrator can be provided as a working device, which vibrator has in particular one or more rotationally driven imbalance units. For the driving of the rotation, one or more hydraulic rotation drives may be installed in the vibrator. Finally, the work apparatus can have a percussion unit, in particular a ram or a hydraulic hammer, in which the ram element or the percussion element is driven in a hydraulically reversing manner.
Accordingly, an efficient ground processing method can be carried out, wherein a tracked change in position by means of the hydraulic hose is possible.
According to a further advantageous variant of the method according to the invention, it is provided that a slotted wall grab with two grab blades which are displaced between an open position and a closed position by means of the at least one hydraulic cylinder which is supplied with hydraulic fluid via the at least one hydraulic hose is used as a working implement, the slotted wall grab for forming a floor trough being displaced to the floor and receiving floor material, wherein the at least one hydraulic hose is unwound from a hose reel, the slotted wall grab, with the closed grab blade receiving floor material, being pulled vertically out of the trough and moved into an emptying position, wherein the at least one hydraulic hose for supplying the at least one hydraulic cylinder is wound onto at least one hose reel, and a minimum pressure is set in the hydraulic hose by the controller with the at least one hydraulic hose wound. As a result, safe operation of the slotted wall grab is possible, in which particularly frequent winding and unwinding of the hydraulic hose takes place.
A particularly high protection of the hydraulic hoses and hose reels can be achieved by the pressure controller according to the invention, in particular in the case of a trench wall grab.
The invention further comprises a construction machine, in particular an underground construction machine, which is characterized in that a control device is provided which is designed to control the pressure of the hydraulic fluid in the at least one hydraulic hose independently of the operation of the work implement in such a way that a predetermined minimum pressure prevails in the hydraulic hose when the at least one hydraulic hose is wound onto the hose reel, in particular for carrying out the previously described method according to the invention.
The previously described advantages can be achieved with a working machine according to the invention.
A preferred embodiment of the invention provides that the construction machine has a mobile support with a hydraulic unit for hydraulic supply, and that the at least one hose reel is rotatably mounted on the support and is driven. The at least one hose reel can be supported here at the superstructure of the load carrier (Oberwagen, sometimes also referred to as vehicle-mounted superstructure) or directly at the struts, guides (M ä kler) or brackets of the load carrier. In particular, two or more hose reels can be supported at the carrier, preferably parallel to one another. The support device preferably has a drivable chassis, in particular with a crawler.
In particular, in the case of a construction machine without a drivable undercarriage, it is also possible for the at least one hose reel to be supported in a separate frame which can be transported independently of the support of the remaining components of the construction machine.
In principle, any work implement which has to be supplied with hydraulic fluid for operation and which is movable during operation can be provided on the work machine, wherein the at least one hydraulic hose has to be tracked. The development according to the invention is particularly advantageous if the working device is designed for the machining of ground surfaces, in particular as a drilling tool, a grab bucket, a milling cutter, a vibrator or an impact unit. The hydraulic hose preferably has a circular cross-section and is formed from a flexible or elastic material, in particular a rubber material or a rubber-like material with a corresponding reinforcing additive.
A particularly advantageous embodiment of the invention provides that the work implement is designed as a slotted wall grab with two grab buckets, which can be moved between an open position and a closed position by means of at least one hydraulic cylinder. In particular, the operation of a slotted wall grab is characterized by frequent lifting and lowering of the grab, wherein a correspondingly frequent winding and unwinding of the hydraulic hose with a corresponding pressure change is necessary for opening and closing the grab bucket.
Drawings
The invention will be further described below with reference to an embodiment, which is schematically shown in the drawing. Shown in the drawings are:
figure 1 shows a side view of a working machine according to the invention with a grooved wall grab; and
fig. 2 shows a schematic sectional view of a hose reel with a wound hydraulic hose.
Detailed Description
Fig. 1 shows an underground working machine 10 according to the invention with a mobile carriage 12, which mobile carriage 12 has a crawler track as chassis 13 and a superstructure 14 rotatably mounted thereon. In the upper structure 14, a hydraulic aggregate for generating a hydraulic pressure for the hydraulic fluid is arranged. The hydraulic aggregate comprises an electric motor or an internal combustion engine, by means of which at least one hydraulic pump can be operated.
Furthermore, an operator cabin 16 with controls for the work machine 10 is provided at the upper structure 14. The load carrier 12 further comprises a column 18 tiltably supported at the superstructure 14, having a substantially vertical operating position.
The work implement 30 is suspended by the load-bearing rope 25 at the head 19 of the mast 18. For the vertical movement of the work apparatus 30, the load-bearing rope 25 can be run by means of the hoist 24 at the upper structure 14. Starting from the column head 19, at least one hydraulic hose 26 is guided parallel to the load-bearing cable 25 to the work implement 30. Typically, at least two hydraulic hoses 26 are provided to provide an input conduit and a return conduit. For simplicity, only one hydraulic hose 26 is shown in the figures and described next. The hydraulic hose 26 can be wound and unwound from a hose reel 20, which hose reel 20 is rotatably supported at the column 18 of the load carrier 12. The hydraulic hose 26 can thus follow the vertical position of the work implement 30 during operation. The hydraulic hose 26 is supplied with hydraulic fluid by a hydraulic unit in the superstructure 14 and is piped with the work implement 30.
In the illustrated embodiment, the work implement 30 is configured as a slotted wall grab 32. The slotted-wall grab 32 has an elongated frame 34, on the side regions of which strip-shaped guide elements 36 are arranged. At the bottom side of the frame 34, two grapple scoops 38 are swingably supported between a closed position and the shown open position. The grapple bucket 38 can be displaced via a central hydraulic cylinder 40 by means of an adjusting lever between an open position and a closed position, wherein the supply with hydraulic fluid takes place via the at least one hydraulic hose 26.
To create the trough 7 in the ground 5, the slotted wall grab 32 with the grab bucket 38 opened is placed on the ground 5. Here, the grapple bucket 38 excavates into the ground 5. By closing the grapple bucket 38 by means of the hydraulic cylinder 40, the ground material is received by the grapple bucket 38. The slotted wall grapple 32 with the closed grapple bucket 38 is then moved upwards, wherein the superstructure 14 can then be swung into the emptying position. In this emptying position, the grapple bucket 38 may be opened to empty the ground material. The slotted wall grab 32 can then be swung back again into the starting position shown in fig. 1 for another grabbing process.
During operation of the slotted wall grab 32 of the work machine 10, the hydraulic hose 26 is tracked as required by winding or unwinding the hose reel 20 by means of the roller drive mechanism 28 in accordance with the movement of the slotted wall grab 32. Depending on the closed position or the open position of the grapple bucket 38, different pressure states can occur in the at least one hydraulic hose 26. In particular, a higher operating pressure or a lower pressure can be present in the hydraulic hose 26.
According to the invention, independent of the operating state of the work implement 30, the control unit of the work machine 10 ensures that, when winding up the hose reel 20 in the hydraulic hose 26, a sufficient minimum pressure is always present in the interior 27 of the flexible hydraulic hose 26.
As is clearly shown in fig. 2, it is ensured by a sufficient minimum pressure in the interior 27 of the hydraulic hose 26 that, during winding onto the hose reel 20, the normal, essentially circular cross-sectional shape of the hydraulic hose 26 remains as far as possible at the windings of the hydraulic hose 26, and the individual windings of the hydraulic hose 26 do not contract in the radial direction. Thereby, the load of the hydraulic hose 26 and the load of the disc-shaped reel wall 29 and the hub of the hose drum 20 can be kept low.
The hose reel 20 is rotatably supported via a reel shaft 21 and at least one rotational bearing 23. By means of a roller drive 28, which is only schematically illustrated, the hose reel 20 can be driven in rotation via a control of the work machine 10 for winding and unwinding the hydraulic hose 26. Here, hydraulic fluid can be supplied from the hydraulic unit at the carrier 12 to the hydraulic hose 26 via the supply line 22 (which is formed essentially by the hollow interior of the spool shaft 21). In particular, a valve assembly with a check valve and/or a throttle can be provided at the feed line 22, by means of which a predetermined minimum pressure of the hydraulic fluid in the hydraulic hose 26 is ensured by the winding movement of the hose reel 20.

Claims (10)

1. Method for operating a working machine (10) having a hydraulically operated working device (30), in which the working device (30) is supplied with hydraulic fluid via at least one hydraulic hose (26), which can receive a high first pressure and at least one low second pressure depending on the operation, which is lower than the first pressure, wherein the at least one hydraulic hose (26) is wound at least partially around a rotatable hose reel (20) and is unwound from the hose reel (20) and wound again onto the hose reel (20) as a function of a displacement movement of the working device (30),
it is characterized in that the preparation method is characterized in that,
a control device is provided, which, independently of the operation of the work apparatus (30), controls the pressure of the hydraulic fluid in the at least one hydraulic hose (26) in such a way that a predetermined minimum pressure prevails in the hydraulic hose (26) when the at least one hydraulic hose (26) is wound onto the hose reel (20).
2. The method as set forth in claim 1, wherein,
it is characterized in that the preparation method is characterized in that,
in the case of winding the hydraulic hose (26), when the hydraulic fluid has a low second pressure, the pressure of the hydraulic fluid in the hydraulic hose (26) is increased to the minimum pressure by the controller, and
the preset minimum pressure is between the high first pressure and the low second pressure.
3. The method according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the hydraulic unit and/or the valve assembly for setting the minimum pressure is/are actuated by the control unit.
4. The method of any one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
at least one sensor device is provided, which detects the pressure in the at least one hydraulic hose (26), the winding movement of the hose reel (20) and/or the operating state of the work apparatus (30).
5. The method of any one of claims 1 to 4,
it is characterized in that the preparation method is characterized in that,
the working tool (30) is designed for processing the ground, and in particular a drilling tool, a grab bucket, a milling cutter, a vibrator or an impact unit is used.
6. The method of any one of claims 1 to 5,
it is characterized in that the preparation method is characterized in that,
a slotted wall grab (32) with two grab buckets (38) which are moved between an open position and a closed position by means of the at least one hydraulic cylinder (40) is used as a working implement (30), the at least one hydraulic cylinder (40) being supplied with hydraulic fluid via the at least one hydraulic hose (26),
the trench wall grab (32) is moved towards the ground (5) for forming a trench (7) and contains ground material, wherein the at least one hydraulic hose (26) is unwound from the hose reel (29),
the slotted-wall grab (32) is pulled back vertically from the trough (7) in a closed grab bucket (38) with the contained ground material and moved into an emptying position, wherein the at least one hydraulic hose (26) is wound onto at least one hose reel (20) for supplying the at least one hydraulic cylinder (40), and
setting, by the controller, a minimum pressure in the hydraulic hose (26) when winding the at least one hydraulic hose (26).
7. A working machine, in particular an underground working machine, having a hydraulically operated working implement (30), which working implement (30) can be supplied with hydraulic fluid via at least one hydraulic hose (26), which working implement (30) can be subjected to a high first pressure and a low second pressure which is lower than the first pressure depending on the operation, wherein the at least one hydraulic hose (26) is at least partially wound on at least one rotatable hose reel (20) and can be unwound from the hose reel (20) and can be wound onto the hose reel (20) again depending on a displacement movement of the working implement (30),
it is characterized in that the preparation method is characterized in that,
a control device is provided, which is designed to control the pressure of the hydraulic fluid in the at least one hydraulic hose (26) independently of the operation of the work apparatus (30) in such a way that a predetermined minimum pressure prevails in the hydraulic hose (26) when the at least one hydraulic hose (26) is wound onto the hose reel (20), in particular in order to carry out the method according to one of claims 1 to 6.
8. A working machine according to claim 7, wherein,
it is characterized in that the preparation method is characterized in that,
the working machine has a mobile carrying device (12) with a hydraulic unit for hydraulic supply, and
the at least one hose reel (20) is rotatably mounted on the support means (12) and is driven.
9. A working machine according to claim 7 or 8,
it is characterized in that the preparation method is characterized in that,
the working device (30) is designed for machining the ground (5), and is in particular designed as a drilling device, a grab bucket, a milling cutter, a vibrator or an impact unit.
10. A working machine according to any of claims 7-9,
it is characterized in that the preparation method is characterized in that,
the work apparatus (30) is designed as a slotted-wall grab (32) having two grab blades (38) which can be moved between an open position and a closed position by means of at least one hydraulic cylinder (40).
CN202210684607.0A 2021-06-18 2022-06-17 Method for operating an engineering machine and an engineering machine Pending CN115490095A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21180242.6A EP4105389A1 (en) 2021-06-18 2021-06-18 Construction machine and method for operating a construction machine
EP21180242.6 2021-06-18

Publications (1)

Publication Number Publication Date
CN115490095A true CN115490095A (en) 2022-12-20

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CN (1) CN115490095A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117286918B (en) * 2023-11-24 2024-02-23 亚核智造(江苏)科技有限公司 Vibrating grab bucket grooving machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9420573U1 (en) * 1994-12-22 1995-02-09 Bauer Spezialtiefbau Hose reeling device
ATE437271T1 (en) 2007-01-26 2009-08-15 Bauer Maschinen Gmbh SOIL REMOVAL DEVICE
ITTO20110502A1 (en) * 2011-06-08 2012-12-09 Soilmec Spa SUPPORT AND GUIDE DEVICE FOR POWER LINES FOR DISCAVOUS DEVICES.
DE102017112418A1 (en) * 2017-06-06 2018-12-06 Liebherr-Werk Nenzing Gmbh Work machine with an attachment, in particular a trench cutter, and attachment, in particular trench cutter
DE202019101949U1 (en) * 2019-04-04 2020-07-07 Liebherr-Werk Nenzing Gmbh Energy chain for a trench cutter

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