Qingdao Yidong Coal Mining Machinery Co., Ltd. is specialized in design and manufacture of

mining purpose flat connector units, block (flat) connector units, compact chain stand (V-lock)

connector units, various non-standard connector units, high strength chain, forged ring and various

non-standard customized mechanical parts.

 

The company was established in 2004. Having been intensively engaged in domestic market for

over a decade, the company has strong technical strength and cutting-edge machining equipment.

ll products are constructed with quality steel alloy as raw material. It relies on advanced heat

treatment and surface treatment technique, precision and perfect testing and inspection equipment

and process to manufacture stable quality and durable products conforming to ISO9001 quality

ystem standard. Among the products, connecting ring series products are qualified for mining

purpose product safety by national product safety approval and certification center.

青岛亿东煤矿机械制造有限公司

QINGDAO YIDONG GOLLIERY MACHINE MANUFACTURING CO.LTD

 

      The company used to be named Qingdao Yidong Machinery Co., Ltd. which was established in 1996. At the initial period of establishment, the company’s main lines of business were mechanical machining and design. Over the two decades, relying on R&D and production of mining machinery, this company has accumulated plenty of production experience and established a great technical

team.

 

      The company now has many CNC drills, mills and grinders, nine machining centers and over

20 wire cutters. It has independent R&D and design team which successfully developed CAD,

CAXA, UG and SOLIDWORKS. The company is able to provide one package service: survey and

mapping, modeling, programming, non-standard customization, developing machining technique

and finished product machining. We also have testing apparatus like hardness tester, flaw detector, 400-ton tension tester. We strictly control quality and ensure each piece of our products is

satisfactory to customer.

 

 

Qingdao Yidong Coal Mining Machinery Co., Ltd. is also specialized in providing parts for scraper conveyor, including scraper, press plate and E-bolts.


The scraper made by Qingdao Yidong Coal Mining Machinery Co., Ltd. is constructed of quality steel alloy, duly precision forged and heated treated, so that the scraper has wonderful performance.


Quality of chain made by Qingdao Yidong Coal Mining Machinery Co., Ltd. has gained extensive recognition by customers in China and abroad.

 

Purpose: for mining round chain (compact chain).
Features: All products are constructed of high strength steel alloy with

excellent structural design, mature heat treatment technology. Advanced

flaw detection and testing equipment is used in product quality inspection.

 

Every packed product has the best performance, high tensile strength,

high wear resistance, long service life and simple and fast installation

feature. It is suitable for in-well high intensity work. It improves effective

working time of in-well equipment, saving cost and increasing production

efficiency.


Reference standard: Flat Connector Unit MT/T99-1997.
                                 Compact chain connector unit DIN22258

 

 

Purpose: scraper conveyor, tube plate reversed loader, coal miner, excavator, coal plough and other similar equipment in which such chain is used.


Manufacture reference standard: DIN 22252/PN-G-46701/GB/T-12718


Caution: Any anti-corrosion protection measure may reduce chain mechanical performance, and therefore such anti-corrosion plan should be agreed for each order.

Strict control of each production process to create a perfect link
Thelinkchainiswidelyusedinminingandtransportationequipment,whichisthecoreofthenormaloperationofthewholeequipment.Therefore,theprocessingqualityofthelinkringwilldirectlyaffecttheproductioneffect,sothequalityrequirementswillbecomemoreandmorestrict!Thelinkringistheconnectingpartonthescraperchainofthecoalminescraperconveyor.Itplaysanimportantroleinthetractionlink,soitisnecessarytocontrolthevariousprocedurestocreateaperfectlink.Thelinkringconsistsoftwoidenticalshrimp-shapedhalfringsandonestablepin.Theshrimp-shapedhalfringisprovidedwithtwotypesofconvexandconcavetoothsystems,andthetoothshapeineachtoothsystemisprovidedwithconvexandconcavearcs,andeachtoothdirectionalsohasacirculararc.Thetwoshrimp-shapedhalfringsaretensionedbytheconvexandconcaveteethandarefixedtogetherbythestabilizingpins.Duetoitsuniquestructure,itisdeterminedtohavesuperiortensile,torsional,flexuralandfatigueresistance.Thetwoconcaveandconvexteethontheshrimp-shapedhalfringareprovidedwitharcsinbothdirections,andeachtoothsystemhashighprecision,soitisdifficulttoprocess.Atthesametime,duetoitshighstrengthrequirements,therequirementsforheattreatmentarealsohigh.Thelinkringhasahighbreakingcapacityandrequireshighreliabilityinoperation.Therefore,itisalsoanurgenttechnicalrequirementtostudythestressofthelinkandimprovethelifeofthelink.Wecanalsousethetheoryofelasticcontactanddeformationcoordinationtostudythecontactforceanddeformationofthepinandthelink.Theminingarc,ladderteeth,andflatchainlinkareanalyzedundertheconditionofmaximumtensileforce,andtheforcereceivedbythelinkringiscalculated,andtheforceofthelinkringisanalyzed.Thedesignofthedockinglinkstructureisoptimizedbyspecifyingdesignparameters.
2019-01-03
What problems should I pay attention to when connecting the chain?
Weallknowthatthesafetystandardoftheconnectingringinthecoalmineisstillveryhigh.Itisrequiredthatthebreakingloadoftheconnectingringshouldnotbelessthanthebreakingloadofthechain.Thishashighrequirementsforthematerialsandtechnologyweuseinproduction.Whentheringisusedinthemine,itisnecessarytousethecoalsafetycertificate,thatis,thecoalminesafetypermit.Fromthispoint,itcanbeseenhowhighthetechnicalrequirementsfortheconnectingringare.Theserratedchainringhasauniquetoothdesign,precisetoothshapeandeasyassemblyanddisassembly.Generalsawtoothringmaterial:23manganese,20manganeseopen,20manganesevanadium,23镙molybdenumtitanium,23manganesenickelbismuthmolybdenumalloy,54steelandothertemperedserratedrings,arctoothringspecifications:18×64,22×86,24×86,26×92,30×108,34×126Serratedchainringfunction:Theserratedconnectingringissuitableforthelinkconnectingthehigh-strengthcircularchainofmine,andtheserratedchainringisItcanbeinstalledhorizontallyandvertically.
2019-01-03
Application of chain link on scraper
Hereisabriefintroductiontotheapplicationofthelinkringonthescraper:Thesawtoothringroothasasmallroundedcorner.Itiseasytocausestressconcentrationwhenloaded.Thenumberofteethofthesawtoothringislarge,thecontactareaislarge,andtheforceofasingletoothissmall.Ifthetoothshapeisnotprocessedproperly,thepitcherrorandtootherrorareeasytooccur.Whentheloadisoverloaded,theindividualteethareoverloadedtoproducefatiguecracks.Usually,thenumberoffatiguesofthesawtoothringislessthan20,000times.Thewirecuttingprocesscanimprovethetoothmeshingandstressconcentration,andthefatiguelifeisimproved,butitstillcannotreach40000timesofthecoalindustrystandard.Thenumberofnewchainlinksisrelativelylarge,therelativeloadofeachtoothissmall,therootofthetoothedringofthestepringislarge,andthestressconcentrationoftherootissmall.Thisdesigngreatlyincreasestheservicelifeofthelink.Thecorrectuseofthescraperisalsoveryimportant.Thehigh-qualitychainlinkcanhelpittocarryoutvarioustaskseffectively.Intheminingindustry,sawtoothringsarealsousedinmanyplaces.Goodsawtoothringsarefavoredbyeveryone.Thechoiceofobjects.
2019-01-03
Customize various sprocket assemblies
Thesprocketassemblyisalsocalledasprocketshaftsetandasprocketassembly.Mostconsistofasprocketbody,abearinghousing,andasprocketshaft.Itisanimportantpartofthescrapertransporterandthereloadingtransporter.Customizedvarioussprocketcomponentsmanufacturers,QingdaoYidongCoalMineMachineryisacomprehensiveentitythatintegratesmachinerymanufacturingandserviceindustries.Itmainlyproducesvariouschainlinks,sprocketshaftsetsandsprocketassemblies.Highqualityandlowprice,welcometocometocustom-madechainringminingringchainsprocketassemblycasting,chainverticalring,flatchainlink,openconnectionring,sawtoothlinkring,mininglinkring,linkring,miningchain,miningringchain,galvanizedringchain,mininghigh-strengthsprocketassembly,sprocketshaftset,high-strengthsprocketshaftset,high-strengthsprocketassembly,sprocketassembly,etc.
2019-01-03
What are the performance characteristics of the scraper conveyor chain?
Basedontheanalysisofthecharacteristicsofthesawtoothringandthestepringring,anewtypeoflinkringisdesigned.Thefiniteelementsoftwareisusedtoanalyzetheforceofthenewlinkringtooth.Theexperimentalresultsshowthatthebreakingloadandfatiguelifeofthenewconnectingchainaresignificantlyimprovedcomparedwiththesawtoothringandthestepring.Theperformancecharacteristicsofthescraperconveyorchainlinkareasfollows:(1)Advancedstructuralanddynamicstrength;(2)Thefaultisrare;(3)Thelifeexpectancyisincreasedby2-3times;(4)Strongbendingresistance;(5)Easytodisassembleandassemble.
2019-01-03
Scraper conveyor failure type and cause analysis
Scraperconveyorfailuretypeandcause1.Scraperdamage:Thesqueegeedamageismostlybentandexcessivelyworn,andafewarecracking.Themainreasonforthisisthatthechutelayingdoesnotmeetthedesignrequirementsandexceedstherequiredbendingangle;thejointatthechuteinterfaceisnotgood,causinglocaldeformationofthechute;largecoalorvermiculiteissuddenlysqueezedduringoperation,sothatthescraperissubjectedtocomparison.Largeimpactforce;whenthespacingofadjacentsqueegeesexceedsthedesignrequirements,thelong-termoperationcausestheloadonthesqueegeetoexceedthelimit.2.Thescraperchainfallsoffonthesprocket:thescraperchaincannotbenormallymeshedwiththesprocket,andtheso-called“jumpingtooth”phenomenonoccurs.Themainreasonsforthisare:thebendingangleofthetransitiongroovebetweenthemachineheadandthemachineheadistoolarge;theplateinthetransitiongrooveofthemachineheadisnotflat;thesprocketwearsseriouslyorbitesintothedebris;thetightnessofthetwochainsisinconsistent;thescraperisseriouslyskewedorspacedBig.3.Thescraperchainisreleasedinthechute:themainreasonisthatthescraperconveyorisnotflattenedwhenitislaid,butisconvexlyconvexandover-curved;thescraperorchuteisseriouslyworn,sothatthescraperThegapbetweentheplateandthechuteistoolarge;thelengthofthetwochainsisdifferent,theforceisuneven;theexcessivedeformationofthescrapercausesthechainlengthofthescraperchaintobeshortened;thepre-tensionofthescraperchainisinsufficient,andthesheareriscuttothetailofthescraperAtthetime,theloadofthescraperchainisincreased,theelongationofthechainisincreased,andthechainiscausedatthetailofthemachine,sothatthescraperiseasilyremovedfromthechute.4.Damagetothelinkring:Inthecurrentsituationofthecontinuousimprovementofthereliabilityofthedomesticringchain,thefatiguelifeofthelinkringisquitedifferentfromthatoftheringchain.Inactualuse,thelinkringbecomesthewholeTheweakerlinkinthescraperchain.Itsdamageformismainlyfracture,whichismainlycausedby:alternatingpulsatingloadforalongtime,fatiguedamageoccursunderwaterfarbelowthebreakingtension;theconnectingboltorpinlooseningandfallingoff,cannotbereplenishedintime.Causesunevenforceorcannotbestressed;whenusedintheverticalring,theunilateralwearisserious,ifthesawtoothorarctoothlinkisnotreplacedintime,itispronetobreak;afterthechain,itwillgeneratealargedynamicloadandTheimpactload,combinedwiththefluctuationofthespeedofthescraperchain,makestherunningofthescraperchainlessstable,whichcausesthelinkringtobreak;themanufacturingqualityispoor,thestandardisnotmet,thehardnessislow,theweariseasy,orthestressconcentrationpointoccurs.Itispronetofatiguecracks,resultingininsufficientstrength.
2019-01-03
二维码
18678958572

Company address:

No. 16 Chongqing North Road, Chengyang District, Qingdao


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Contact number:

0532-89081751

18678958572 Manager Liang     

18663922772 Manager Li

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qdydmj@sina.com

Company Fax:

0532-89081572