CN105839683A - Semi-submersible type hydraulic grab for cleaning and dredging - Google Patents
Semi-submersible type hydraulic grab for cleaning and dredging Download PDFInfo
- Publication number
- CN105839683A CN105839683A CN201610336746.9A CN201610336746A CN105839683A CN 105839683 A CN105839683 A CN 105839683A CN 201610336746 A CN201610336746 A CN 201610336746A CN 105839683 A CN105839683 A CN 105839683A
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- CN
- China
- Prior art keywords
- grab
- semi
- dredging
- cleaning
- hydraulic
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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.)
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Classifications
-
- 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
- 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
- E02F3/60—Buckets, scrapers, or other digging elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses a semi-submersible type hydraulic grab for cleaning and dredging. The semi-submersible type hydraulic grab for cleaning and dredging is characterized in that the hydraulic grab comprises a main barrel, claws symmetrically installed on the main barrel, and a hydraulic drive unit for driving the claws; the claws are composed of a plurality of claw bodies arranged in a grate mode; and long claw tips and short claw tips of all the claw bodies are distributed alternately. The semi-submersible type hydraulic grab for cleaning and dredging has the advantages that the hydraulic grab is simple in structure and can be used for cleaning, drainage, ditching and underwater deposit fishing of garbage pools in the waste incineration power generation industry and used for cleaning of reservoir gates, river gates and other places where water surface deposits and underwater deposits are likely to occur; since the claw bodies are arranged in the grate mode, after grabbing garbage or deposits, the grab can drain garbage percolate or river water inside the grab in time; and as the long claw tips and the short claw tips of the claws are distributed alternately, the claw tips can be conveniently inserted into materials and effectively grab the materials.
Description
Technical field
The invention belongs to technical field of waste treatment, be specifically related to a kind of for clearing up and the semi-submersible type hydraulic grab of dredging.
Background technology
Domestic garbage burning electricity generation industry is all selected many lobes electric hydraulic bucket to capture house refuse and is put into stove burning, but because in rubbish, water content is more, during stacking fermentation, have substantial amounts of percolate produce, percolate floss hole it is designed with at the bottom of garbage pool own, composition complexity due to house refuse, in dump leaching rubbish, part rubbish floating object quickly will can block percolate floss hole and cause percolate liquid level too high, cause incineration firing value to reduce.Usually, garbage burning factory can irregularly arrange maintainer to enter the rubbish of special cleaning channel cleanup percolate floss hole silting, owing to garbage pool fermentation produces the harmful gass such as substantial amounts of biogas, percolate complicated component, have great nature of injury to the person, security risk is high.Existing method is to capture the silting thing of percolate floss hole reluctantly with many lobes hydraulic grab, and its top view cross section of orange-peel bucket is sub-circular, and the construction features of its bucket lobe limits, cause working effect very poor, the floating thing of blocking cannot be cleared up and the rubbish deposition of corner, the partition management of garbage pool and stacking trench digging effect are the most bad.
Patent CN 104746548 A discloses one " the multi-functional grab bucket of electric hydaulic ", use the bivalve bucket body opening and closing of horizontal oil cylinder pushing tooth-shape structure, but the connected mode of single cross cylinder and pawl lobe limits the underwater cleaning effect of grab bucket, the garbage-cleaning under high level cannot be solved in actual applications, the external structure of pawl lobe also can damage rubbish pool wall greatly simultaneously, the crown of pawl lobe easily causes percolate floss hole to damage, owing to the structure of this patent pawl lobe limits, it is impossible to carry out working under municipal solid waste incinerator is engaged in normal percolate liquid level.
Patent CN 102031798 A discloses one " dredging extrusion grab bucket ", use two grab bucket jaws and the stripper plate of correspondence thereof and hydraulic cylinder structure, this patent solves the underwater performance problem of grab bucket, its structure in operation process without being repeatedly lifted up, but be unsuitable for cleaning and the dredging operation of garbage pool, and not part drain function.
Patent CN 204174645 U discloses " a kind of Multifunctional hydraulic claw ", its pawl valve structure is similar loading shovel structure, is provided with multiple teeth in bottom, it is impossible to the rubbish captured is carried out draining and drains, due to the mobility of Leachate site, cause completing cleaning and dredging work.It addition, the oil cylinder of horizontally set cannot overcome huge moment to damp, the most easily frequently occur fault.
In the garbage pool of domestic garbage burning electricity generation industry, owing to there is no effective cleaning dredger, the silting thing cleaning making percolate bottom drain becomes abnormal difficult and dangerous, in order to rubbish dump leaching is fermented it is necessary to rubbish is being carried out subregion, stacking, trench digging, it is simple to normally oozing out of Leachate site, meet the certain liquid height of Leachate site, ensure the fermentation liquid level of rubbish, thus, cleaning and trench digging in garbage pool just seem the most necessary.Meanwhile, in large reservoir, river course, the normal safe of water conservancy projects is run most important by the water surface near gate and under water silting thing, can only use artificial closely fishing at present, and production efficiency is extremely low, and security risk is big.
Summary of the invention
In place of it is an object of the invention to according to above-mentioned the deficiencies in the prior art, there is provided a kind of for clearing up and the semi-submersible type hydraulic grab of dredging, this semi-submersible type hydraulic grab is that double-edged fine-toothed comb formula arranges by making each corpus unguis, and make the pawl point on each corpus unguis be interspersed in length, thus improve the crawl of grab bucket and drain ability.
The object of the invention realizes being completed by techniques below scheme:
A kind of for clearing up and the semi-submersible type hydraulic grab of dredging, it is characterized in that described hydraulic grab include main cylinder, the pawl lobe that is symmetrically arranged on described main cylinder and the hydraulic drive unit driving described pawl lobe, if described pawl lobe is made up of the corpus unguis that arterial highway is the arrangement of double-edged fine-toothed comb formula, the pawl point of each described corpus unguis is that length is interspersed.
The pawl point of described corpus unguis is in canine tooth shape.
Some cross reinforcings it are provided with between described corpus unguis.
Grid type is used to connect between described corpus unguis.
Described hydraulic drive unit includes hydraulic cylinder and hydraulic system, and wherein, described hydraulic cylinder is arranged between described main cylinder and described pawl lobe outer wall, and one end of described hydraulic cylinder and described main cylinder are articulated and connected, the other end is articulated and connected with the outer wall of described pawl lobe.
Described main cylinder upper end is provided with one and hangs lid, described in hang lid be connected for rotary type between described main cylinder.
It is an advantage of the invention that, hydraulic grab simple in construction, may be used for the garbage pool cleaning of waste incineration and generating electricity industry, drain, trench digging, drift is fished for and reservoir strobe under water, river course gate etc. other easily occur water surface material and under water silting material deposition cleaning, each road corpus unguis is that the arrangement of double-edged fine-toothed comb formula is so that its interior percolate or river can be discharged after capturing rubbish or silting material by grab bucket in time, and the pawl point on corpus unguis is interspersed in length, so that crown inserts material and can effectively be captured by material, thus solve bottom garbage pool, the rubbish deposition of corner, and the percolate liquid level caused by the blocking of percolate outlet cross height etc. problem, it is finally reached garbage pool cleaning, drain, the effects such as the cleaning of trench digging and river course silting material.
Accompanying drawing explanation
Fig. 1 is semi-submersible type hydraulic grab schematic diagram in the present invention；
Fig. 2 is the semi-submersible type hydraulic grab side view using cross reinforcing in the present invention；
Fig. 3 is the semi-submersible type hydraulic grab side view using latticed connection in the present invention；
Fig. 4 is semi-submersible type hydraulic grab transverse state operating diagram in the present invention；
Fig. 5 is semi-submersible type hydraulic grab longitudinal direction operation schematic diagram in the present invention.
Detailed description of the invention
Inventive feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, in order to the understanding of technical staff of the same trade:
Such as Fig. 1-5, in figure, labelling 1-12 is respectively as follows: grab bucket main cylinder 1, pawl lobe 2, hydraulic cylinder 3, hydraulic system 4, hangs lid 5, hinged secondary 6, chain sling 7, pawl point 8, corpus unguis 9, cross reinforcing 10, grid 11, pool wall 12.
Embodiment: as Figure 1-3, the present embodiment is specifically related to a kind of semi-submersible type hydraulic grab, garbage pool for domestic garbage burning electricity generation industry is cleared up, grab bucket can go deep into lower about 3 meters of liquid level, carry out rubbish under liquid level floater and liquid cleaning, can have simultaneously and drain, trench digging, drift is fished for and reservoir strobe under water, the cleaning of other easy appearance material waterborne such as river course gate and under water silting material deposition, solve bottom garbage pool, the rubbish deposition of garbage pool corner, and the percolate liquid level that causes of the blocking of percolate outlet crosses the problems such as height, this hydraulic grab is mainly by grab bucket main cylinder 1, the hydraulic drive unit being symmetrically arranged on the pawl lobe 2 on grab bucket main cylinder 1 and driving claw lobe 2 opening and closing is formed.
As Figure 1-3, grab bucket main cylinder 1 is realized lifting by a crane loading and rotates, and crane is directly constituted is connected by 2 piece or 4 piece chain slings 7 between lid 5 with hanging of grab bucket main cylinder 1 upper surface；It should be noted that, hang lid 5 according to the connected mode of crane may be configured as square hang lid or circle hang lid, by making grab bucket main cylinder 1 and hanging between lid 5 by high-strength bolt composition rotary type connection, exchange realizing hanging between lid 5 and grab bucket main cylinder 1 assembling after 90-degree rotation, it is achieved the use that grab bucket as shown in Figure 4,5 is horizontal and vertical.
As Figure 1-3, pawl lobe 2 is by hinged secondary 6 both sides being symmetrically arranged on grab bucket main cylinder 1, pawl lobe 2 is in streamlined corpus unguis structure, under the driving of hydraulic drive unit, pawl lobe 2 is with the pin joint between grab bucket main cylinder 1 as center of rotation, carrying out corresponding closure or openness operation, in order to effectively capture material and not interfere with garbage pool sidewall or river course gate, the maximum opening angle of pawl lobe 2 is close to 90 degree；If pawl lobe 2 is specifically made up of the corpus unguis 9 that arterial highway is the arrangement of double-edged fine-toothed comb formula, corpus unguis 9 is in canine tooth shape, and the pawl point 8 of each corpus unguis 9 is interspersed in length, in order to pawl point 8 is by less damping and can effectively insert material, capture material；In addition, connected fixing between the corpus unguis 9 that each road is spaced apart by cross reinforcing 10 as shown in Figure 2, certainly, can also be attached fixing by grid 11 as shown in Figure 3 between the corpus unguis 9 that each road is spaced apart, it is to say, either use cross reinforcing 10 or grid 11, while increasing pawl lobe 2 structural strength, rapidly the liquid in pawl lobe 2 can be discharged, it is to avoid liquid stays in pawl lobe 2 and cannot leach in time；It should be noted that for the wearability improving pawl point 9, pawl point 9 uses the structural alloy steel overall structure identical with corpus unguis 8 material or special steel alloy fabricated structure.
As Figure 1-3, hydraulic drive unit is made up of hydraulic cylinder 3 and hydraulic system 4, hydraulic cylinder 3 is arranged between grab bucket main cylinder 1 and pawl lobe 2 outer wall, i.e. one end of hydraulic cylinder 3 by hinged secondary 6 with grab bucket main cylinder 1 is hinged, the other end by hinged secondary 6 hinged with pawl lobe 2, by control hydraulic cylinder 3 stretch thus control claw lobe 2 carries out opening, closed action；Hydraulic system 4 is used for driving hydraulic cylinder 3 to stretch, power to motor by being connected to the service cable driving motor of hydraulic system 4, motor driven liquid pressure oil pump works, the unloader arranged in hydraulic system 4 and logical valve are combined as system and provide setting pressure and the hydraulic energy of flow, hydraulic oil enters hydraulic cylinder 3 from rod chamber, driving piston rod does work, when hydraulic cylinder 3 is retracted to the limit, pawl lobe 2 is in maximum open mode, now pawl lobe 2 lower end and vertical direction form certain angle as shown in Figure 1, maximum opening angle and be on close level (90 degree)；When making hydraulic oil enter hydraulic cylinder 3 rodless cavity by control knob, pawl lobe 2 starts Guan Bi, and when hydraulic cylinder 3 is elongated to the limit, pawl lobe 2 is in maximum close state.
As Figure 1-5, the method of work utilizing the semi-submersible type hydraulic grab in the present embodiment to carry out clearing up and dredge in cell body comprises the steps: to move to above garbage pool by crane by grab bucket main cylinder 1, control hydraulic cylinder 3 and be retracted to the limit, so that pawl lobe 2 is in maximum open mode, now pawl lobe 2 lower end and vertical direction form certain angle as shown in Figure 1, maximum opening angle and be on close level (90 degree)；Crane is transferred pawl lobe 2 and is fallen with the pool wall 12 against garbage pool, and according to the practical situation of garbage pool, pawl lobe 2 can go deep into lower about 3 meters of liquid level in half latent mode, and pawl point 9 inserts rubbish or silting thing under gravity；Control hydraulic cylinder 3 gradually to extend, make pawl lobe 2 close, thus capture the rubbish in garbage pool or silting material, and percolate is discharged by the space of double-edged fine-toothed comb formula structure on closing course median claw lobe 2, is finally reached rubbish and the cleaning of silting material in garbage pool.
Hydraulic grab in the present embodiment may be used for the garbage pool of waste incineration and generating electricity industry clear up, drain, ditch, under water drift fish for reservoir strobe, river course gate etc. other cleaning that water surface material and silting material deposition under water easily occur, solve bottom garbage pool, the rubbish of garbage pool corner deposits, and the percolate liquid level that causes of the blocking of percolate outlet crosses the problems such as height, can effectively capture garbage pool or reservoir, the silting material in river course, be finally reached garbage pool and clear up, drain, ditch and the effect such as cleaning of river course silting material.
Claims (6)
1. the semi-submersible type hydraulic grab being used for cleaning and dredging, it is characterized in that described hydraulic grab include main cylinder, the pawl lobe that is symmetrically arranged on described main cylinder and the hydraulic drive unit driving described pawl lobe, if described pawl lobe is made up of the corpus unguis that arterial highway is the arrangement of double-edged fine-toothed comb formula, the pawl point of each described corpus unguis is that length is interspersed.
The most according to claim 1 a kind of for clearing up and the semi-submersible type hydraulic grab of dredging, it is characterised in that the pawl point of described corpus unguis is in canine tooth shape.
The most according to claim 1 a kind of for clearing up and the semi-submersible type hydraulic grab of dredging, it is characterised in that between described corpus unguis, to be provided with some cross reinforcings.
The most according to claim 1 a kind of for clearing up and the semi-submersible type hydraulic grab of dredging, it is characterised in that between described corpus unguis, to use grid type to connect.
The most according to claim 1 a kind of for clearing up and the semi-submersible type hydraulic grab of dredging, it is characterized in that described hydraulic drive unit includes hydraulic cylinder and hydraulic system, wherein, described hydraulic cylinder is arranged between described main cylinder and described pawl lobe outer wall, and one end of described hydraulic cylinder and described main cylinder are articulated and connected, the other end is articulated and connected with the outer wall of described pawl lobe.
The most according to claim 1 a kind of for cleaning and dredging semi-submersible type hydraulic grab, it is characterised in that described main cylinder upper end is provided with one and hangs lid, described in hang lid be connected for rotary type between described main cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336746.9A CN105839683A (en) | 2016-05-20 | 2016-05-20 | Semi-submersible type hydraulic grab for cleaning and dredging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610336746.9A CN105839683A (en) | 2016-05-20 | 2016-05-20 | Semi-submersible type hydraulic grab for cleaning and dredging |
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| Publication Number | Publication Date |
|---|---|
| CN105839683A true CN105839683A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610336746.9A Pending CN105839683A (en) | 2016-05-20 | 2016-05-20 | Semi-submersible type hydraulic grab for cleaning and dredging |
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| CN (1) | CN105839683A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934762A (en) * | 2017-12-25 | 2018-04-20 | 浙江邦博机械有限公司 | A kind of grab bucket of grab bucket crane |
| CN109484970A (en) * | 2018-12-30 | 2019-03-19 | 上海昂丰矿机科技有限公司 | A kind of hydraulic grab with dentalation |
| CN113370258A (en) * | 2021-07-13 | 2021-09-10 | 太原理工大学 | Rotary clamping jaw |
| CN113442158A (en) * | 2021-07-28 | 2021-09-28 | 太原理工大学 | Self-adaptive bidirectional variable-rigidity clamping jaw |
| CN116397713A (en) * | 2023-05-12 | 2023-07-07 | 北京金河生态科技有限公司 | Underwater environment-friendly obstacle clearing device, system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004003444U1 (en) * | 2004-03-05 | 2004-07-29 | Uwb U. Diving Services Gmbh (Unterwasserbau Und Diving Services Gmbh) | Rake with cleaning water supply for cleaning bottom of harbor or waterway and for salvaging munitions has connections to individual channels running from base to tip of individual tines |
| US20050000124A1 (en) * | 2003-07-03 | 2005-01-06 | Wolfgang Rohr Gmbh & Co. Kg | Hook-on grab bucket, in particular motor-driven underwater grab bucket |
| CN2675631Y (en) * | 2004-03-08 | 2005-02-02 | 郑州华电水利机械制造有限公司 | Hydraulic total span orange-peel raking bucket |
| CN2700400Y (en) * | 2004-04-14 | 2005-05-18 | 长春工程学院 | Grab bucket of decontaminating machine |
| CN201148631Y (en) * | 2008-01-09 | 2008-11-12 | 长江重庆航道工程局 | Clamshell type hydraulic claw bucket for underwater dredge |
| CN205776444U (en) * | 2016-05-20 | 2016-12-07 | 上海昂丰矿机科技有限公司 | A kind of for clearing up and the semi-submersible type hydraulic grab of dredging |
-
2016
- 2016-05-20 CN CN201610336746.9A patent/CN105839683A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050000124A1 (en) * | 2003-07-03 | 2005-01-06 | Wolfgang Rohr Gmbh & Co. Kg | Hook-on grab bucket, in particular motor-driven underwater grab bucket |
| DE202004003444U1 (en) * | 2004-03-05 | 2004-07-29 | Uwb U. Diving Services Gmbh (Unterwasserbau Und Diving Services Gmbh) | Rake with cleaning water supply for cleaning bottom of harbor or waterway and for salvaging munitions has connections to individual channels running from base to tip of individual tines |
| CN2675631Y (en) * | 2004-03-08 | 2005-02-02 | 郑州华电水利机械制造有限公司 | Hydraulic total span orange-peel raking bucket |
| CN2700400Y (en) * | 2004-04-14 | 2005-05-18 | 长春工程学院 | Grab bucket of decontaminating machine |
| CN201148631Y (en) * | 2008-01-09 | 2008-11-12 | 长江重庆航道工程局 | Clamshell type hydraulic claw bucket for underwater dredge |
| CN205776444U (en) * | 2016-05-20 | 2016-12-07 | 上海昂丰矿机科技有限公司 | A kind of for clearing up and the semi-submersible type hydraulic grab of dredging |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934762A (en) * | 2017-12-25 | 2018-04-20 | 浙江邦博机械有限公司 | A kind of grab bucket of grab bucket crane |
| CN109484970A (en) * | 2018-12-30 | 2019-03-19 | 上海昂丰矿机科技有限公司 | A kind of hydraulic grab with dentalation |
| CN113370258A (en) * | 2021-07-13 | 2021-09-10 | 太原理工大学 | Rotary clamping jaw |
| CN113370258B (en) * | 2021-07-13 | 2022-04-15 | 太原理工大学 | Rotary clamping jaw |
| CN113442158A (en) * | 2021-07-28 | 2021-09-28 | 太原理工大学 | Self-adaptive bidirectional variable-rigidity clamping jaw |
| CN113442158B (en) * | 2021-07-28 | 2022-06-03 | 太原理工大学 | Self-adaptive bidirectional variable-rigidity clamping jaw |
| CN116397713A (en) * | 2023-05-12 | 2023-07-07 | 北京金河生态科技有限公司 | Underwater environment-friendly obstacle clearing device, system and method |
| CN116397713B (en) * | 2023-05-12 | 2024-02-06 | 北京河沐生态科技有限公司 | Underwater environment-friendly obstacle clearing device, system and method |
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