Ekskavaator

Dredging

2012-02-04T14:12:00.000+02:00

Esimene üle 20 kuupmeetrine pärikoppekskavaator

2012-01-16T13:19:00.000+02:00

Esimene üle 20 kuupmeetrine pärikoppekskavaator

TTÜ MÄEINSTITUUT: Talvine vastuvõtt geotehnoloogia magistriõppesse, ...

2012-01-11T20:08:00.000+02:00

TTÜ MÄEINSTITUUT: Talvine vastuvõtt geotehnoloogia magistriõppesse, ...: 04.-12. jaanuaril 2012 toimub vastuõtt geotehnoloogia magistriõppesse. Mäeinstituut ootab loodus-, tehnika- ja majandushuvilisi õppima geo...

Masinajaht: Lisandusid draglainid ja puurvankrid

2011-12-30T21:26:00.000+02:00

Masinajaht: Lisandusid draglainid ja puurvankrid: Praegused masinate kategooriad: Buldooser , Draglain , Ekskavaator , Freeskombain , Greiferkopp , Greiferkoppeksavaator , Hüdrova...

Mäeinstituut- geotehnoloogia, koolitus, teadustöö, projekteerimine, teenused ja tööpakkumised
Kaevandamine ja geoloogia

Mehaaniline pöördkoppekskavaator Tiskre oja algust süvendamas. 1976.a. [ http://maeopik.blogspot.com/2011/07/poordkoppekskavaator.html ] Autor: Tiit Kasemetsa ; http://mi.ttu.ee/masinajaht/

2011-12-30T16:56:00.000+02:00

Mäeinstituut- geotehnoloogia, koolitus, teadustöö, projekteerimine, teenused ja tööpakkumised
Kaevandamine ja geoloogia

Paljukopaline kettekskavaator Titicaca järve sadamas, valmis vee alt järve põhja süvendama. http://maeopik.blogspot.com/2009/09/paljukopaline-kettekskavaator.html Autor: Ingo Valgma; http://mi.ttu.ee/masinajaht/

2011-12-11T21:29:00.000+02:00

http://mi.ttu.ee/masinajaht/

Esimene suruõhu e. pneumoekskavaator

2011-11-25T06:43:00.000+02:00

Esimene suruõhu e. pneumoekskavaator

Mäenduslinkide kogu: Masiajahi veebileht

2011-11-25T06:34:00.000+02:00

Mäenduslinkide kogu: Masiajahi veebileht: Masinajaht on avatud http://mi.ttu.ee/masinajaht/ Vt. ka - geotagging masinate pildid ja kaardid

Esimene ühe aurumootoriga pärikoppekskkavaator

2011-11-15T20:16:00.000+02:00

Esimene ühe aurumootoriga pärikoppekskkavaator

Mäeinstituut- geotehnoloogia, koolitus, teadustöö, projekteerimine, teenused ja tööpakkumised

Harku järve kaldal

2011-10-10T21:36:00.000+03:00

From Ekskavaatorid

Ekskavaatorite ja teedeehitusmasinate leht

2011-09-01T09:49:00.000+03:00

Veebilehel http://ehitusmasinad.onepagefree.com avaldatud masinakirjeldused:

Pildigalerii erinevate ekskavaatorite kohta - siin saavad esitletuks kaabel-, drenaaži- kui ka hüdraulilised ekskavaatorid.

Hüdrauliline ratasekskavaator EO-3323A.

DT-75 ja hüdrauliline ratasekskavaator EO-3323A töötamas jõetammi ehitamisel.

Trossekskavaator/ Drenaažiekskavaator E-304G.

Pildid üldisest tehnikast, mida võib enamus inimesi märgata.

Greiferkopaga JuMZ-6KL/EO-2621-V2 ja GAZ-53 / SAZ-3507 (?)tüüpi kallur sügisesel lehekoristusel.

"Talleksi" endine tranšee-ekskavaator ETZ-165A saabus just lehekoristusele. Antud ekskavaatoril puudub aga põhitööorgan ning on kasutusel kommunaaltraktorina.

Hüdrauliline ratasekskavaator EO-2621-V-2 traktori JuMZ-6KL baasil. V-2 versiooni tunnuseks on kopa pööramine külgedele kettsüsteemi abil( -V-3'l on kopa pööramine hüdrauliline.).

GAZ-53 madelveok Paides. Enam seda masinat pole. Ratastraktor MTZ-52 buldooserseadmega.

Neli GAZ-52 agregaatidel põhinevat autolaadurit M-4018(?) & nende modifikatsioonid.

Rootsi päritolu LDV(?) diiselmootoriga autolaadur saekaatri juures.

KamAZ-55102 e põllumajanduslik versioon ehitustöödel.

Arvatavasti Scania Vabis ehitustöödel. Antud masinale on

paigaldatud Multilift-tüüpi kast.

KamAZ-5511 ning Kamaz-55111 Paides. Kanalisatsiooni uuendamise ajal oli neid hulgi liikumas.

Teleskooptõstuk AP-17A GAZ-53 baasil Tallinnas.

Siin galeriis on kõikvõimalikud linttraktorid erinevate tööorganitega.

EO-3323A ja oranž DT-75 buldooserseadmega. Buldooseril oli pärast mootorisätteid väheke probleeme. Mõlemad tegutsevad tammi ehitamise kallal.

Väga heas korras DT-75 Paides Maxima ehitusplatsil. Buldooseri mark on arvatavasti DZ-42, kuid tera on kindlasti ümberehitatud. Paar päeva hiljem nähti masinat aktiivses töös.

T-130 kabiin....ja selle omanik. Buldooseri margiks DZ-117, traktor T-130.

Tšeljabinski Roomiktraktoritehases toodetud traktori T-130 baasil DZ-110 buldooser Paides.

Väga heas korras, buldooseriga DZ-54 raske-roomiktraktor T-100MGP(siiani töökorras!).

Oranž DT-75 buldooseriga DZ-42 Paides Selveri ehitusel. Aparaat kuulub AS Paide MEK-ile.

Traktor T-170 varustatud buldooseri DZ-110 ning juurijaga (taga).

Traktor T-170B.G1 varustatud tundmatu buldooseriga.

Buldooser DZ-42G traktoril DT-75N.

DT-75B baasil MTT-12 ümberehitatud versioon. Originaalis peaks tõstuk paiknema kabiini kohal, antud juhul on see ette monteeritud.

Torupaigaldusseadmega Altai Roomiktraktoritehase haruldane linttraktor T-4A.

Pildid meie mail liikunud höövlitest, teerullidest ja muudest teetöömasinatest.

Paide Kutsekoolis valmistatud liikurhöövli V-10 makett Järvamaa Muuseumis. Päris masina konstrueeris 1957. aastal A. Volberg Paide Teedemasinate Tehases, mis hiljem nimetati ümber tootmiskoondiseks "Talleks". Koondise põhitoodanguks olid drenaažiekskavaatorid ja tranšee-ekskavaatorid, sellest rohkem infot lehel hhtp://talleks.pri.ee .

Pildigalerii erinevatest kraanadest.

KamAZi V8 mootoriga versioon Zil-133GJa kraanaga KS-3575A (tõstejõud 10t, noole pikkus 14,5 m).

Tuvastamata margiga KamAZ hüdrokraanaga. Antud mudel on juba uuetüübilise kabiiniga.

Väga ilusti taastatud telferkraana Tallinnas.

Karjääriekskavaator

2011-08-24T07:26:00.000+03:00

Karjääriekskavaator

The "Captain"

2011-08-05T18:20:00.000+03:00

The "Captain"

Marion 6360

Photos contributed by:

Tim Twichell

Thanks Tim, we all appreciate the chance to see this legendary machine in action.

Cover of the Arch of Illinois Feb/March 1985 newsletter

Used without permission, copyright Arch Minerals.

The Captain was a unique machine in many ways. Besides being the largest mobil land machine ever built ( at that time)28 million pounds..., and having the largest dipper capacity (180 CY), Many other features made this Marion shovel stand out. Features like being designed to strip two seams of coal simultaneously, or having enough clearance below it to allow loaders and haul truck to pass under it in safety (while it was operating.), or having two trailing cable reels, mounted on opposite sides of the machine... so it wouldn't have to turn around when it reached the end of the pit, and a host of others.

The Captain began it's working life in 1965 for Southwestern Illinois Coal Corp. at it's "Captain Mine" (hence the name) where itwas given the unique job of stripping two seams of coal simultaneously. The upper seam was about 50 feet above the lower one, And a machine was needed that could handle the job. Marion engineers went to work on the problem, and the captain was the result. As all shovels do, it walked directly upon the coal and stripped the seam in front of it, but this machine also stripped the upper seam at it's side ( the upper seam was nearly level with the operators cab). After making a pass, and the coal had been removed from both seams, the captain moved over and stripped the bench left from the upper seam down to the level of it's tracks. As the machine progressed, the overburden was placed in the pit left by the previous pass.

This view clearly shows the upper seam of coal being stripped along side the captain, as well as the seam it's walking on.

A Few of The Captains Specs

Weight:	28 million pounds
Height:	21 stories tall
Dipper Capacity:	180 CUBIC YARDS
Dipper Length:	133 Feet
Boom Length:	215 Feet
Size of dipper opening:	18' 6" Wide X 16' High

Photo: Arch Minerals of Illinois

This gives you a real good idea of what it takes to support and move a BIG shovel. The wooden mats are to keep the shovel from sinking into soft or unstable soil.

More Pics of the captain

Esimene aurumootoriga paljukopaline kettekskavaator

2011-08-04T13:48:00.000+03:00

Esimene aurumootoriga paljukopaline kettekskavaator

Cat Electric Shovels for Mining

2011-08-01T14:00:00.000+03:00

Cat Electric Shovels for Mining

STRIPMINE.ORG

2011-07-30T18:14:00.000+03:00

Welcome to
STRIPMINE.ORG
Dedicated to the preservation and restoration
of historic surface mining equipment

Donations Needed !

HELP SUPPORT
STRIPMINE.ORG

RFI Energy's Marion 7820, with Harley Stone at the controls.

Jeff & Dave's visit to RFI Energy
September 26, 2008

Dragline World

10/21/2008
ADDITIONS TO THE SITE

About "stripmine.org"

AIR BRUSHED TEE SHIRTS

By: Dave Dauksha

click for more info

HELP SUPPORT
STRIPMINE.ORG

See a new P&H 9020 Dragline Being Built.

Compliments of:
P&H Mining Equipment
click here (will open a new window)

Ekskavaatoriõpik

2011-07-28T10:56:00.000+03:00

Ekskavaatoriõpik

Pöördkoppekskavaator

2011-07-26T20:17:00.000+03:00

Pöördkoppekskavaator

Esimene üle 180 kraadi pööratava noolega hammasvööga terasest pärikoppekskavaator

2011-07-25T14:38:00.000+03:00

Esimene üle 180 kraadi pööratava noolega hammasvööga terasest pärikoppekskavaator

Nool

2011-07-20T18:42:00.000+03:00

Nool

Big Muskie

2011-07-15T23:04:00.001+03:00

Maailma suurim draglain - Big Muskie

Kopalehel

Rekordilehel

Õpikus

Marion 7820

2011-07-15T18:18:00.000+03:00

A Visit to
RFI Energy

Photos by: Dave Hopper

RFI Energy's Marion 7820 near West Freedom, PA

A lot of people really don't like surprise visitors, and usually, I don't like to show up without calling ahead, but on September 13th, Jeff Solley and I showed up at RFI Energy's Mine near West Freedom, PA.

I had to make a quick trip to the area, and about 3 days before leaving I called Jeff Solley, to see if he could point me in the direction of a few drags in the area.

Since Jeff knows the location of just about every drag in Western PA, he decided to give me a tour of the area. After seeing a few parked machines, we showed up at RFI Energy, and to our surprise...the drag was running.

Jeff decided to try to contact the drag on the CB, to see who might be operating at the time, We tried the CB , but had no luck. While we were sitting there, Jeff asked me about a guy from the message board, who was an operator for RFI Energy, and the name Harley came to mind. As we sat there trying to remember Harley's last name, and flipping channels on the CB, we came across someone saying that this black ford looked like a hearse,.... we'll we knew.. they were talking about Jeff's Truck.

After hopping on the CB, and letting them know, "That's not Nice", jeff asked who we were talking to, It was Harley Stone... That's the name we couldn't remember.

We Identified ourselves, and were quickly invited onboard. I'm not sure who was more surprised, Harley.. because we showed up? or Me, because of the great welcome we were receiving?.

RFI Energy's Marion 7820

As we climbed aboard the Drag, I couldn't believe the luck we were having. FInding the machine digging on a Saturday was a surprise, but finding a friend of the website in the operators seat at the time, was just incredible.

As we walked into the cab, I was surprised to see how young Harley was..it's not too often you see such a young man in that position. After the Introductions, when Harley went back to digging, I was even more surprised. He handled the Marion like he's been on it for many years, not just the few month he's been in the seat.

Seeing this bucket swinging on a saturday, took our minds off of the pouring rain.

Mäendusõpik - mi.ttu.ee/opik: Vesiratta abil töötav ajalooline haardkoppekskavaator

2011-06-02T06:45:00.000+03:00

Mäendusõpik - mi.ttu.ee/opik: Vesiratta abil töötav ajalooline haardkoppekskavaator

Inimjõul töötav ajalooline pärikoppekskavaator

2011-06-02T06:44:00.000+03:00

Inimjõul töötav ajalooline pärikoppekskavaator

Geoetehnoloogia film

2009-07-06T11:52:00.001+03:00

Film: Mis on geotehnoloogia?

Mäetehnika lingid

2009-04-24T13:32:00.000+03:00

Viimased blogi sissekanded

Kanal : Mäetehnika

Veebiülekanne seminarist

06:11 24.04.2009 kanalilt Mäetehnika

Bucyrus Introduces LatchFreeTM Dipper System

05:30 01.04.2009 kanalilt Mäetehnika

Aggregates And Mining

15:11 24.03.2009 kanalilt Mäetehnika

Pit Mining Simulation

16:31 14.02.2009 kanalilt Mäetehnika

Wheeled Loader Training Simulator

Product Description 16:29 14.02.2009 kanalilt Mäetehnika

Bucyrus Introduces New VAST™ System

Designed specifically for Bucyrus electric mining shovels, the new VAST™ (Value Added Simulation Training) system reduces training costs, increases productivity, and improves training 16:14 14.02.2009 kanalilt Mäetehnika

Sandvik MT300 Roadheader

16:38 08.02.2009 kanalilt Mäetehnika

Sandvik MH620 Roadheader

16:37 08.02.2009 kanalilt Mäetehnika

Sandvik MR620 Roadheader

16:37 08.02.2009 kanalilt Mäetehnika

Sandvik MR120 Roadheader

16:36 08.02.2009 kanalilt Mäetehnika

Sandvik Borer Miner MF320

16:35 08.02.2009 kanalilt Mäetehnika

Sandvik Borer Miner MF420

16:35 08.02.2009 kanalilt Mäetehnika

Sandvik Borer Miner MF220

16:34 08.02.2009 kanalilt Mäetehnika

Lühieekombain / Sandvik Borer Miner MF120

16:33 08.02.2009 kanalilt Mäetehnika

Lühieekombain / Sandvik MC200 Continuous Miner

Sandvik MC200 Continuous Miner 16:31 08.02.2009 kanalilt Mäetehnika

Läbinduspuur / Sandvik MD320 Box Hole Borer

Sandvik MD320 Box Hole Borer 16:28 08.02.2009 kanalilt Mäetehnika

Lühieekombain / Sandvik MT 720 Roadheader

Sandvik MT 720 Roadheader 16:26 08.02.2009 kanalilt Mäetehnika

Lühieekombain / Sandvik MR300 Roadheader

16:22 08.02.2009 kanalilt Mäetehnika

Mobiilne purusti / Telsmith's QuarryTrax Model TI6060

16:02 08.02.2009 kanalilt Mäetehnika

MinExpo 2008: the Biggest Ever

(Source: Mining Engineering) 13:42 25.01.2009 kanalilt Mäetehnika

Volvo Construction Equipment Launches Third Model in the Company’s Short Swing Excavator Class

2009-02-14T14:01:00.000+02:00

Volvo Construction Equipment recently introduced the Volvo ECR305CL, short swing radius excavator to the North America market, the third of its class within the last 12 months. The new product range was developed by Volvo to fill a rapidly growing need for short swing excavators on congested worksites and in confined areas.

According to Volvo, the new 34.8 ton Volvo ECR305CL overcomes the dynamic challenges of producing excavators that work with high performance capabilities and exceptional stability in confined areas. Precisely-engineered weight distribution and increased swing torque also gives the new machine superior swing performance when working on slopes.

Whether operating in cities, laying utilities, mining duties, highway work, in addition to a multitude of other diverse applications, the increased safety and maneuverability offered by short swing excavators on congested worksites has seen the rapid growth of this important segment in the market.

Like the smaller machines in the range, the compact body on the Volvo ECR305CL swings only fractionally outside its own track width – less than 80 mm (with 800mm shoe) – enabling it to work extremely close to objects (walls, road barriers etc.) without risk of collision with the rear of the machine as it swings. Safety on a job site can never be underestimated and this is particularly important to Volvo where safety is one of the company’s core values.

Even when not working close to obstructions, the short front/rear radius has other uses – highway work being a prime example, where the machine can safely swing within a typical single road lane width, minimizing disruption with traffic flow.

The all-new, rounded cab on Volvo’s short swing models is also designed to stay within the rear swing radius. Despite this design consideration, it remains the roomiest and most comfortable cab in the market – as befits Volvo’s reputation for providing superior operator environments.

The sliding door provides the operator with the ability to access and exit the cab even when it is positioned close to an obstruction, such as close to a wall. Whilst at work, the industry-leading heating and ventilation system ensures the perfect working environment, irrespective of weather conditions.

Source and Photo Credit: Volvo Construction Equipment

The Hitachi Zaxis 120-3 Handles Both Big And Small Jobs With Ease

2009-02-14T14:00:00.000+02:00

According to Hitachi, the recently introduced Zaxis 120-3 can handle everything from the mundane to the exotic, ranging from digging basements, loading trucks, and placing pipe.

Easily towed behind a dump truck and available with rubber crawler pads and a backfill blade, the ZX120-3 is driven by 28,498-pound ZX120-3 with its 93-horsepower Isuzu engine and patented HIOS III hydraulic.

It can generate 24,720 pounds of drawbar pull and 25,077 foot pounds of swing torque, wield 12,823-pound breakout force, and lift a maximum of 11,443 pounds over the front at a distance of 15 feet (blade on ground).

Thanks to the extremely fuel-thrifty four-cylinder Isuzu engine and long engine and hydraulic oil-change intervals, are easy on diesel dollars.

Auxiliary attachment flow can be programmed in the cab, using the widescreen multilingual color LCD monitor. The monitor also provides easy access to maintenance and operational information.

The ZX120-3 is available with either 8-foot 3-inch or 9-foot 11-inch arm. Track choices include 20-inch rubber crawler pad or 24-inch or 28-inch triple semi-grouser steel shoes. A backfill blade is available, with the blade width varying according to the selected shoe size.

A control pattern-change valve, single-pedal propel control, an air-suspension heated seat, and high-pressure, high-flow auxiliary hydraulic package are also available.

New John Deere 75D Excavator Designed For Light Site And Underground Work, Landscaping

2009-02-14T13:59:00.000+02:00

John Deere recently introduced the 75D mid-sized hydraulic excavator. According to the John Deere site, this conventional boom, reduced tail swing unit weighs in at 17,637 pounds, has a 15-foot, 1-inch dig depth and is perfect for light residential, site development, underground and landscaping duties.

"This excavator's reduced tail swing and 360-degree rotation enable it to get into tight spaces," said Mark Wall, excavator product marketing manager for John Deere. "Once you're there, its power and precision take over."

The 75D has a 54-net hp diesel certified to EPA Interim Tier 4 emission standards and Deere's exclusive Powerwise) engine/hydraulic management system that maximizes power output, saves fuel and delivers smooth, multifunction operation just like the rest of John Deere's D-Series excavators.

"If you're a small contractor or landscaper who needs pinpoint metering for control yet a lot of production in a highly maneuverable, fuel-efficient package, the 75D is a great unit," Wall said. "Generous hydraulic flow and increased swing torque will help you load more trucks and open more trench."

Big productivity doesn't mean more fuel consumption when you're running a Deere. The excavator's "E" working mode can save fuel by running more efficiently compared to the previous model's "P" mode, while providing similar production. An auto-idle feature helps make the most out of every drop of fuel.

Source: John Deere

CASE suurim ekskavaator

2009-02-08T09:14:00.000+02:00

Case Upgrades Its Largest Excavator Model CX800B

Filed under: Construction Equipment — mgots @ 10:43 pm

Case Construction Equipment today announced the upgrade of its largest excavator – the CX800B – to its B Series line of excavators. The new CX800B features increases in fuel efficiency and productivity, as well as improved operator comfort and ease of maintenance.

The excavator also features an electronically controlled, common rail Tier 3-certified 15.7L Isuzu engine which delivers 532 net hp (397 kW).

The CX800B is available in standard and mass excavation configurations, making it ideally suited for a variety of quarry, road and bridge and other applications requiring heavy muscle and long reach.

Increased fuel efficiency and productivity
The common rail fuel injection system, combined with the redesigned hydraulic system, delivers increased fuel efficiency over the previous model.

“The CX800B delivers increased fuel efficiency and productivity, which results in more cubic yards of material per gallon of fuel,” said Mitchell Blake, Case brand marketing manager.

“Our first customer is operating the CX800B three shifts a day in a mining operation,” Blake said. “In December, they ran the machine for more than 600 hours. The foreman’s not only amazed at its productivity, but also at the fuel efficiency. He said that, compared to a competitive excavator model, the CX800B will save more than $100,000 a year in fuel.”

The CX800B features regenerative hydraulics on the boom and arm, as well as the bucket curl, which speeds the cycle time required to get a bucket of dirt. Larger-diameter hydraulic cylinders deliver a breakout force of 74,187 lb (330 kN).

Quiet, comfortable cab
The sound levels inside the isolation-mounted cab are among the quietest in the industry, even at full throttle. Reinforced tubular structures in the cab help dampen vibrations.

The excavator cab features a seat that adjusts independently of the joystick controls for improved operator comfort and ergonomics. The CX800B excavator also features memorized operator adjustment, which automatically adjusts to the last settings selected by the operator. An optional air seat makes the operator even more comfortable.

Ease of maintenance
The CX800B features a “green plug” that provides an easier, cleaner and greener engine oil change. The engine oil filter, remotely located in the pump house, is easy to change without the need to go underneath the machine. The hydraulic oil filter provides 100-percent continuous flow filtration of all hydraulic oil on the return line. Flip-open service panels provide easy access to virtually all key components.

The CX800B has an operating weight of 178,575 lb (81,000 kg), a bucket capacity of 5.91 yd3 (4.52 m3), a bucket digging force of 96,668 lb (430 kN) and a maximum dig depth of 35 feet (10.66 m).

In addition to the CX800B, the full line of Case B Series excavators includes the CX130B, CX160B, CX210B, CX240B, CX290B, CX350B, CX470B and CX700B. Case also produces the CX75, CX80, CX135 and CX225 minimum swing excavators, as well as a full line of compact excavators.

Moving Of Bucket-Wheel Excavator

2009-01-27T20:15:00.000+02:00

3:56 AM | Amazing, bucket, coal, cool, excavator, largest, mining, pictures, wheel | 0 comments »

Bucket-wheel excavators are heavy equipment used in surface mining and civil engineering. They are among the largest vehicles ever constructed. The excavation component itself is a large rotating wheel mounted on an arm or boom. On the outer edge of the wheel is a series of scoops or buckets. As the wheel turns, the buckets remove soil or rock from the target area and carry it around to the backside of the wheel, where it falls onto a conveyor, which carries it up the arm toward the main body of the excavator.

These tremendous earth-movers take 5 years to assemble, require 5 people to operate, weigh more than 13,000 short tons (12,000 t), and have a daily capacity of 240,000 short tons (220,000 t) of brown coal.

On this pictures you can see when it crawled from one mine to the other - across 22 kilometers of fields, roads, railway crossings, villages and countryside... As it could not go around the obstacles, it headed in a straight line, so the workers prepared the way by piling up sand cushions on top of highways and train tracks, removing power-lines and seeding the fields with special grass to make its progress smoother.

This is how it feels inside the drivers cabin

Link ,

What is a Drag Line Excavator?

2009-01-25T16:05:00.000+02:00

Picture above is a drag line excavator commonly used in strip mining and large excavation projects.

Drag line excavator systems are heavy machinery that is used in civil engineering, surface mining, and excavation. With civil engineering, the smaller types are used for road and port construction. The larger types of drag line excavators are used in strip mining operations to extract coal. These are among the largest types of mobile equipment and weigh upwards of 10,000 tons!

The drag line excavator bucket system consists of a large bucket that is suspended from a boom. The bucket is moved by a number of chains and ropes. The hoisting rope, which is powered by either a large diesel or electric motor, will support the bucket and hoist coupler assembly from the boom. The drag rope on the assembly is used to draw the bucket assembly horizontally. Through skillful maneuvering of the hoist and drag rope, the bucket can be controlled for many different types of operations.

Operating A DragLine Excavator

With a typical excavation cycle, the bucket is positioned high above the material that is being excavated. The bucket is then lowered down and the drag rope is drawn so that the bucket is dragged along the materials surface. Using the hoist rope, the bucket is then lifted. A swing operation is then performed in order to move the bucket to the place where the material is going to be dropped. The drag rope is then released which will cause the bucket to tilt, making the material in the bucket fall down, which is commonly known as a dump operation.

With smaller drag line excavators, the bucket is thrown by winding up the jib then releasing a clutch on the drag cable, which swings the bucket like a pendulum. Skillful operators can make the bucket land about 1/2 the length of the jib further away than if it had just been spun or dropped.

DragLine Excavator Limitations

The limitations of drag line excavators are the height and length of their boom, as this limits where the drag line can dump waste material. Being inherent with their construction, the drag line is most effective when excavating material below the level of their tracks. Drag lines aren’t suitable for loading piled up material.

Despite their limitations and high capital cost, drag line excavators remain very popular with several mines, due to their very low waste removal cost, performance, and reliability.

They also have different cutting sequences. The first is the side casting method which uses offest benches. This method involves throwing the overburden sideways onto blasted material to make a bench.

The second method is a key pass. This pass will cut a key at the toe of the new highwall and will also shift the bench further towards the low wall. This can also require a chopping pass if the wall is blocky. A chopping pass will involve the bucket being dropped down onto an angled highwall to scale the surface.

The next method is the slowest, known as the blocks pass. This method will however, move the most material. The blocks pass involves using the key to access the bottom of the material to lift it up to spoil or to an elevated bench level. If required, the final cut is a pull back, which pulls the material back further to the low wall side.

For construction, mining, or excavation, drag line excavators are great to have. They can move even the biggest of material, which is great for deep holes in the ground. If you’ve been looking for a great way to maximize mining or excavation productivity, the drag line excavator is just what you need.

How Excavation Equipment Has Changed

2009-01-25T16:04:00.001+02:00

There are many different opinions as to what machines should actually be classified as earth moving equipment. There are many different types of equipment that fall in this category, such as excavators, backhoe loaders, dump trucks, and even loaders.

The photo on the right is of just part of the largest excavator, earth mover, in the world.
See more here Large Excavator.

Other machinery that falls in between are articulated trucks, wheel and track tractors, and even scrapers. The thin line is normally drawn at motor grades, which are more than capable or light duty excavation, although they are mainly used to level lots and grade roads.

If you take a glance at any equipment literature from leading companies such as CAT, Komatsu, or Case, you’ll see right away that they believe the biggest and most important change over the last several years is increased productivity. This is normally followed by greater comfort and safety.

The increase in productivity is the result of many different advancements. CAT (Caterpillar) cites that more powerful engines with a faster rise in torque which allows machines to respond faster to increased power demands. Even though this new generation is far more powerful, it has a reduced impact on the environment as well.

Electronics
Most of the newer machines have electronic control systems that will optimize both engine and transmission performance, as well as fuel consumption and hydraulic system performance.
Take for example the CAT mid sized G series wheel loaders that feature electronically controlled powershift transmissions. Each and every transmission offers autoshift capabilities that ease the pressure on the operator, and an electronic clutch pressure control that smooth shifts the gears for longer life.

Comfort
In the industry, good operators are getting harder and harder to find. Manufacturers find themselves stressing that operator comfort and convenience need to be taken into account not only to make the job easier, but also more efficient and productive as well.
The new cab designs offer better visibility, reduced noise and vibration, and improved comfort as well. The new control systems will require low operator effort while also improving the control of the machine for both the experienced as well as the in-experienced operator.

Easier maintenance
Almost all new machinery offers electronic monitoring systems that will provide constant
information on the health of the machine for the operator. These types of systems provide information to technicians, including service modes that will help them to diagnose conditions quickly.

Now days, machines are designed to make routine maintenance easier. With CAT’s wheel loaders, regular service points are easy to access from ground level, with site gauges making it easier to check the fluid of the radiator, hydraulic oil, and transmission - without having to use dipsticks.

Changes for the better
If you compare the excavation equipment of today with the machines of the past, you’ll notice that the changes are better. The machines of the past relied more on operator skill and technique, as very few of them had electronic features.

Today, almost all types of heavy machinery offer electronic features. Electronics are a great thing, as they can make the life of an operator easier than ever. You don’t need to get out and check the fluids anymore, as all you need to do is take a look at your instrument panel, which can help to save you a lot of time.

Operators who have a lot of experience know first hand that machines of the past can’t begin to compete with machines of today. With technology always getting better, it just makes you wonder what is in the future for heavy machinery. Years from now, one can only begin to wonder just great heavy machinery will get - and what other features will make the life of an operator even easier than it is now.

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25.01.2009

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