EP0689636A1 - Zweischaufelgreifer zum herstellen zylindrischer bohrungen - Google Patents
Zweischaufelgreifer zum herstellen zylindrischer bohrungenInfo
- Publication number
- EP0689636A1 EP0689636A1 EP94911826A EP94911826A EP0689636A1 EP 0689636 A1 EP0689636 A1 EP 0689636A1 EP 94911826 A EP94911826 A EP 94911826A EP 94911826 A EP94911826 A EP 94911826A EP 0689636 A1 EP0689636 A1 EP 0689636A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- gripper
- support
- rope
- gripper according
- Prior art date
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title description 4
- 239000002689 soil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B11/00—Other drilling tools
- E21B11/04—Boring grabs
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B11/00—Other drilling tools
Definitions
- the invention relates to a two-bucket gripper for producing cylindrical bores in the ground, for example for creating piles as foundation elements for carrying high loads, or arranged one behind the other as so-called dissolved or overlapped pile walls, or for sinking well bores and the like. Like uses.
- Known two-bucket grippers of this type for example according to DT-OS 20 09 597, are equipped with falling and piercing gripping tools.
- the blades which are designed as spades, penetrate the soil when falling and take hold of the loosened soil when the blades are closed.
- the gripping effect has a decisive influence on the gripper's conveying performance with comparable soil properties; it naturally depends very much on whether it is very shear-resistant, cohesive, or sandy or coarse-gravel soils. In these cases or even when the groundwater level is high, ie when used under water, there is a risk that the blades will not close due to the jamming of stones between the spade blades and the filling will be completely or at least partially rinsed out through the gap.
- the gripping effect is influenced by the design and position of the blade pivot bearings, because this determines the closing curve of the spade blade, which can be tweezer-like or more blade-like.
- Experience has shown that, for example, in the case of puncturing grippers with external bucket swivel bearings and simple scissor linkage ratio, when used in cohesive soils, up to approximately 1.3 Diameter can be worked powerfully.
- a prerequisite for an effective gripping effect of the digger is a sufficiently deep penetration of the blade spades into the ground. Depending on the shear and compressive strength of the soil, a certain impact energy is required for this; this results from the product mass x velocity to the 2nd power (xv 2 ).
- the lancing and closing process can be repeated several times in succession in order to optimize the degree of filling. This is not possible with single rope grabs; these close after impacting the sole without any possibility of follow-up.
- the task of the invention is derived from these circumstances, and it is aimed at creating a device which is more universally adaptable for the different operating conditions mentioned, can be combined with the most varied and also lighter types of excavator construction and, above all, also with the described very different flooring properties, optimal degrees of filling of the blades are always guaranteed.
- connecting means arranged between the gripper frame and excavator rope on the frame crosshead releasably connecting to the frame stems.
- the frame stems on at least two mutually articulated, shell-shaped support runners with an outer profile that corresponds approximately to the bore radius.
- the gripper according to the invention with these features can be used both as a hydraulic gripper and as a rope gripper.
- the device can only be set or dropped from a very low height.
- the vertically directed shovel spades can be pushed into the soil under high contact pressure. This requires a large - and still expandable - dead weight of the gripper body with the gripper blades and is made even more effective by repeated additions in conjunction with an oscillating one - rocking, hydraulically controlled closing movement of the blades.
- the gripper according to the invention with the features of its basic design has the further great advantage that it can be converted into a cable gripper or vice versa into a hydraulic gripper by only a few exchange measures.
- Other essential features can be seen in the fact that On the crosshead for connection to the excavator, a rope pulley or a rope lead-through with a rope deflection roller is arranged and also that a drive cylinder engaging the drive carriage is connected to the crosshead or that a deflection pulley set arranged on the drive slide connected to a closing rope by means of rope reeving communicates with a cable pulley block which is connected to the frame base plate with detachable elements.
- the interchangeable frame crosshead can be provided in two designs which are particularly advantageous for the operation as a rope gripper or as a hydraulic gripper, specifically for hydraulic operation with a loose rope pulley for reeving the excavator rope and with connecting means for the drive cylinder and for rope operation with a rope deflection roller and with a rope lead-through for the closing and hoisting rope.
- the frame base plate can also be detachably connected to the frame handles. This is advantageous if the blade bearings are attached directly to the frame base plate.
- the blade bearings can also be connected to a blade bearing block that is detachably connected to the frame base plate.
- a special additional weight can be connected to the frame base plate according to a further proposal.
- Further essential features relate to the arrangement of the support runners and their movement functions. Two supporting runners are preferably provided opposite one another; For larger borehole diameters, for example, four support runners can also be useful. If the borehole to be produced remains uncased, the support runners of the gripper can be adjusted in such a way that they guide the gripper along the wall of the borehole with a small gap.
- each of the support runners is assigned to the drive carriage and is mounted in support brackets which are mounted in supports and on which spring-loaded support runners rest, which are articulated to the inside of the support runners.
- the support runners can be pressed against the pipe wall by the movement of the support rollers with the drive carriage, which bear against the support rails.
- the lower end of the support runners is articulated in the lower region of the support runners and resiliently held in its upper region against the associated support runners against spring pressure and are provided with a concave recess adapted to the support roller.
- the support rails with their concave recesses hold the support rollers with the drive carriage in the open bucket position despite the slack rope when the open gripper drops from the uppermost position from, for example, 5 heights, the two ropes being uncoiled .
- the support rollers When hitting the bottom of the borehole or before the start When the blades are closed, the support rollers press out of the concave recess of the support rails and exert an outward pressure on the latter, counter to a spring force, which is transmitted as a pressing force to the support runners and briefly while the shovel spade is penetrating the soil, presses against the pipe wall so that the gripper can only be pushed upwards by friction.
- This pressure force takes effect automatically as soon as the drive carriage begins its downward movement from its starting position, initiated by the powerful impact of the gripper on the sole, or by actuating the closing rope.
- the blades can remain in their open position during this first movement phase of the drive carriage if, according to a further feature of the invention, the pull-push linkage is connected to the drive carriage and the blade spades via an axially movable bearing.
- the drive chute can travel a short distance, overcome the blockage, press the support skids against the drill pipe without exerting pressure on the linkage. Only then, as a result of the further positive movement of the drive carriage downward, is the blade closing movement initiated under the influence of the tension.
- the bracing effect can be controlled via the vertical, non-positive movement of the support rollers connected to the drive carriage.
- FIG. 2 shows the frame of the gripper according to FIG. 1,
- FIG. 3 shows the blade set of the gripper according to FIG. 1,
- FIG. 4 shows the frame crosshead of the gripper according to FIG. 1,
- FIG. 5 shows a section A-A 'through the frame (Fig. 2)
- FIG. 10 shows a partial view of the gripper according to FIG. 7 in the tubular borehole with blocked drive slide, 11 the gripper according to FIG. 7 or FIG. 1 in the cased borehole with the drive carriage unblocked, and bracing via support runners,
- FIG. 12 shows the gripper according to FIG. 11 in the closing phase of the blades, with the support runners pivoted back with released tension.
- the gripper frame "GR" represents the framework of the gripper; part of this frame can be seen as frame frame 1 in FIGS. 2, 4, 5.
- the blade bearing block 26 is fastened to the frame base plate 2 with the blade pivot bearings 31 of the blades 5, as can be seen from FIG. 3.
- a centering mandrel 20, which is inserted into a corresponding bore in the frame base plate 2, serves for the exact fixation on the screw bearing bracket 26 and is secured by connecting tension bolts 21.
- With 27 the bearing holes on the blades 5 for the tension and compression linkage 15 are designated; their position is coordinated with the blade pivot bearings 31 such that in the open state the blade spades with teeth 43 are directed vertically downwards.
- the frame crosshead 4 can be removed by loosening the bolt connection (not shown) - see bores 23 - and against another crosshead, preferably the frame crosshead 6 for the cable bushing 46 - see FIG. 7 to 12 - are exchanged.
- the drive cylinder 13 is anchored in a bore by means of an anchor bolt 25 and connected to the drive slide 12 by means of a bearing bolt 24, to which the pull-push rod 15 is connected to the bearing points 28.
- the drive carriage is guided longitudinally on the frame stems 3.
- a bladder pressure accumulator 44 In connection with the hydraulic Drive cylinder 13 is provided with a bladder pressure accumulator 44 which ensures that the blades remain closed under pressure during the conveying path.
- a cable pulley 18 is also connected to the frame crosshead 4 as a connecting means between the gripper frame GR and the excavator via a swivel with a pressure bearing 17 and the connections 16 for the hydraulic hose connections.
- FIG. 5 illustrates in a sectional view the frame stems 3 with the frame base plate 2.
- the additional weight 14 shown in FIG. 6 is detachably connected by means of a bolt connection 19 to a bearing plate 22 which is attached between two frame posts 3.
- Numeral 11 designates two mutually opposite support runners which are fastened to the frame stems 3 in a manner not shown in more detail; they can be designed to be radially adjustable.
- the functionally essential elements are easily detachably and interchangeably connected to the frame, so that a modular system is created.
- This design of the gripper means that it can be quickly switched from hydraulic to cable operation. In many cases, this possibility saves having one rope and hydraulic gripper at hand, because depending on the local ground conditions and drilling ⁇ one or the other type of gripper is more economical to use.
- 7 to 12 relate to rope designs of the gripper according to the invention, as are preferably designed for use in the uncased and in the cased borehole. det.
- FIGS. 7 and 8 the drive slide 12 for the blade actuation is moved by means of the pull and push linkage 15 by means of a block and tackle arrangement.
- This block and tackle consists of the deflection roller set 7 in the drive carriage 12 and the rope pulley deflection block 8 with the bearing plate 22 and the closing and pulling rope 9 and 10, through which - in the exemplary embodiment tulip-like - cable passage 46 are guided.
- the support heads 11 for use in the uncased borehole are not movably attached to the frame stems 3. They are provided with support rails "A" 34, which are mounted at 35 in the support runners 11 and are resiliently pressed against the support rollers 29 of the drive carriage 12 by means of the compression springs 36 arranged in adjustable abutments 37. In the position of the drive carriage 12 shown in FIG. 7, its support rollers 29 are engaged in the recesses 47 of the support rails 34, and this positive engagement engages the drive carriage 12 with the pulling and pushing linkage 15 during the falling of the gripper onto the bottom of the borehole fixed in position so that the opening position of the blades is reliably maintained even when slack rope is formed.
- the support rollers 29 press the support rail "A" outwards with a short downward movement and roll over the depressions 47 when the drive carriage 12 moves downward further, so that they rest on the running surfaces - Run sections 48 and 49.
- FIGS. 10 to 12 show the design and mode of operation of the gripper according to the invention in the rope or hydraulic version in the cased borehole.
- the support rollers 29 of the drive carriage 12 is engaged in the recesses 47 of the support running rails "B" 40 and as a result the drive carriage 12 is fixed in its upper starting position and the blades 5 remain open despite possible slack rope formation.
- the support rollers 29 disengage from the recesses 47 and press the support runners in the adjoining tread section 50 of the support rails 40 in the direction of the drill pipe 45, so that a brief pressure thereby occurs ⁇ force is exerted, which clamps the gripper in its mounting position via frictional engagement, so that when the shovel spade is pressed into the soil, the gripper experiences a greater counterforce.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4309269 | 1993-03-23 | ||
DE4309269A DE4309269A1 (de) | 1993-03-23 | 1993-03-23 | Zweischaufelgreifer zum Herstellen zylindrischer Bohrungen |
PCT/DE1994/000307 WO1994021884A1 (de) | 1993-03-23 | 1994-03-19 | Zweischaufelgreifer zum herstellen zylindrischer bohrungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0689636A1 true EP0689636A1 (de) | 1996-01-03 |
EP0689636B1 EP0689636B1 (de) | 1997-06-04 |
Family
ID=6483538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94911826A Revoked EP0689636B1 (de) | 1993-03-23 | 1994-03-19 | Zweischaufelgreifer zum herstellen zylindrischer bohrungen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0689636B1 (de) |
JP (1) | JP2719611B2 (de) |
KR (1) | KR0177262B1 (de) |
CN (1) | CN1046987C (de) |
DE (2) | DE4309269A1 (de) |
WO (1) | WO1994021884A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2765257B1 (fr) * | 1997-06-25 | 1999-09-03 | Bachy | Benne d'excavation a cables perfectionnee |
ES2160081B1 (es) * | 1999-12-16 | 2002-06-01 | Codina Juan Vicente Herrero | Cuchara para maquinas excavadoras de muros pantallas y pilotes rectangulares, y maquina dotada de dicha cuchara. |
CN101440624B (zh) * | 2007-11-22 | 2011-01-19 | 北京市三一重机有限公司 | 自动调节的导向装置 |
CN101440626B (zh) * | 2007-11-22 | 2010-12-22 | 北京市三一重机有限公司 | 摆动式纠偏装置 |
CN103205990B (zh) * | 2013-04-18 | 2015-11-11 | 大连大金马基础建设有限公司 | 动力冲击液压抓取式取土装置 |
CN103485381A (zh) * | 2013-09-09 | 2014-01-01 | 浙江鼎业基础工程有限公司 | 冲抓机 |
JP6087794B2 (ja) * | 2013-11-20 | 2017-03-01 | 山本基礎工業株式会社 | ハンマーグラブ |
CN107989095A (zh) * | 2017-12-15 | 2018-05-04 | 中科纳达新材料(广西)有限公司 | 一种用于建筑地基的刨坑装置 |
CN111749620A (zh) * | 2020-07-20 | 2020-10-09 | 深圳市金世纪工程实业有限公司 | 灌注桩旋挖钻筒渣土铲卸装置 |
CN114084663B (zh) * | 2021-11-12 | 2024-04-02 | 洛阳万基金属钠有限公司 | 一种金属钠棒抓取机构 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1070375B (it) * | 1976-12-30 | 1985-03-29 | Casagrande & C Spa | Perfezionamenti alle benne con valve fulcrate,in posizione interna e benne cosi' perfezionate |
DE3615068C1 (en) * | 1986-05-03 | 1987-10-08 | Dyckerhoff & Widmann Ag | Rope-guided trench-wall grab |
CN1012220B (zh) * | 1987-08-03 | 1991-03-27 | 西安石油学院 | 悬浮式涡流地震检波器 |
DE3933866A1 (de) * | 1989-08-05 | 1991-04-11 | Fromme Theo | Zwangsgefuehrter schlitzwandgreifer |
-
1993
- 1993-03-23 DE DE4309269A patent/DE4309269A1/de not_active Withdrawn
-
1994
- 1994-03-19 EP EP94911826A patent/EP0689636B1/de not_active Revoked
- 1994-03-19 WO PCT/DE1994/000307 patent/WO1994021884A1/de not_active Application Discontinuation
- 1994-03-19 JP JP6520521A patent/JP2719611B2/ja not_active Expired - Fee Related
- 1994-03-19 DE DE59403029T patent/DE59403029D1/de not_active Expired - Fee Related
- 1994-03-19 KR KR1019950704136A patent/KR0177262B1/ko not_active IP Right Cessation
- 1994-03-19 CN CN94191553A patent/CN1046987C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9421884A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR960701280A (ko) | 1996-02-24 |
DE59403029D1 (de) | 1997-07-10 |
JP2719611B2 (ja) | 1998-02-25 |
WO1994021884A1 (de) | 1994-09-29 |
EP0689636B1 (de) | 1997-06-04 |
CN1046987C (zh) | 1999-12-01 |
DE4309269A1 (de) | 1994-09-29 |
KR0177262B1 (ko) | 1999-02-18 |
CN1119884A (zh) | 1996-04-03 |
JPH08506394A (ja) | 1996-07-09 |
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