CN107225360A - Plate in intermediate channel after the middle pan of scraper conveyor method of worn and reparation - Google Patents
Plate in intermediate channel after the middle pan of scraper conveyor method of worn and reparation Download PDFInfo
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- CN107225360A CN107225360A CN201710418974.5A CN201710418974A CN107225360A CN 107225360 A CN107225360 A CN 107225360A CN 201710418974 A CN201710418974 A CN 201710418974A CN 107225360 A CN107225360 A CN 107225360A
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- middle plate
- termination
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005299 abrasion Methods 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 8
- 230000008439 repair process Effects 0.000 claims description 29
- 238000013461 design Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 5
- 238000005488 sandblasting Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000007592 spray painting technique Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 210000005056 cell body Anatomy 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 210000001138 tear Anatomy 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
Abstract
The invention belongs to drag conveyor recovery technique field, plate in intermediate channel after specially a kind of the middle pan of scraper conveyor method of worn and reparation, middle part groove middle plate of scraper conveyer method of worn, drag conveyor includes central slot, comprised the steps of：Step one：Remove the termination of plate and the new middle plate termination of correspondence processing in abrasion；Step 2：Plate does not remove part during the new middle plate termination of welding and reparation are former.Plate does not remove part in plate, including original in intermediate channel after reparation, and plate does not remove the end of part and is welded with new middle plate termination in original.The present invention is by the way of plate termination in removal abrasion, and process new middle plate termination and welded together with plate remainder in original, and centering plate does not remove part and repaired, such a restorative procedure can be for reparation middle plate of the wear extent more than 1/3, and the middle plate after repairing is functional, service life is long.
Description
Technical field
The invention belongs to drag conveyor recovery technique field, specially a kind of the middle pan of scraper conveyor abrasion reparation side
Plate in intermediate channel after method and reparation.
Background technology
The middle pan of scraper conveyor belongs to the critical component of coal mine work winning apparatus drag conveyor, the middle part of batch
Groove, end to end lead-over groove and the series connection of head tail are in addition to forming the propelling chain road of a scraper chain, one material of main formation
Driven and transport by scraper chain in transport channel, cell body of the material on middle plate.It follows that intermediate channel is the core of drag conveyor
Center portion part, its Performance And Reliability directly affects the life-span of drag conveyor.The failure of drag conveyor 80% is caused by abrasion
, and the abrasion of intermediate channel is mainly reflected in the abrasion of middle bottom plate and the abrasion of ledge.And the abrasion of middle plate be it is topmost,
Secondly it is the abrasion of ledge and bottom plate.The overhaul of the middle pan of scraper conveyor is based on the abrasion reparation of middle plate.The abrasion of middle plate
Service life after reparation affects the service life of drag conveyor.
At present, each drag conveyor producer of domestic coal machine profession and equipment use unit it is believed that drag conveyor
The middle plate wear extent of intermediate channel is continuing with after being less than can the repairing of thickness of slab 1/3, and wear extent is more than 1/3 according to scrapping place
Reason, therefore cause the service life of drag conveyor to reduce significantly, equipment is increased using the expensive of new equipment of purchasing of unit
Plus.It also result in a large amount of wastes of material.Plate in the repair mode that plate weares and teares in two kinds, a kind of intermediate channel is currently, there are to wear and tear
Repair mode be built-up welding by wearing layer, thickness is up to 8~12mm, and built-up welding is generally the large area of the overall chain road fray of middle plate
The weldering and built-up welding of the rhombus net trellis drawn game portion rib shape of repair welding and built-up welding and middle plate surface.Plate weares and teares in second of intermediate channel
Repair mode for large area pasting board or strip and block pasting board mode repair.But due to the abrasion principal mode table of plate in intermediate channel
Plate male and female end serious wear in now, and abrasion is not serious in the middle part of middle plate, is distributed in drum shape.The repair mode of plate in first two
Weak point show：After the first build-up wear-resistant layer, thickness low LCL that middle plate male and female head end built-up welding is repaired less and in middle plate
Portion repairs too thick, thick more than raw sheet.Second of pasting board is there is also the situation of the middle thin thick middle in plate male and female end or in order to meet reparation
Reach afterwards original thickness generally processed on the basis of thinnest part it is flat in plate repair again in the way of pasting board, cause material waste and in
The reduction of portion's groove intensity.Intermediate channel service life using plate repair mode in both is all shorter, after reparation using failure all
It is that the secondary wear out failure in male and female two ends of therefrom plate starts.And there is height when slotware male and female is overlapped in both repair modes
Mismatch, be easily caused scraper chain operation it is not smooth, cause the accident.
The content of the invention
The technical problem to be solved in the present invention is：The service life of intermediate channel after plate repair mode is repaired in existing two kinds
It is all shorter, and be easily caused scraper chain operation it is not smooth, cause the accident, to solve the above problems, providing a kind of drag conveyor
Plate in intermediate channel after intermediate channel middle part method of worn and reparation.
The purpose of the present invention is realized in the following manner：
Middle part groove middle plate of scraper conveyer method of worn, drag conveyor includes central slot, comprises the steps of：
Step one：Remove the termination of plate and the new middle plate termination of correspondence processing in abrasion；
Step 2：Plate does not remove part during the new middle plate termination of welding and reparation are former.
Remaining central slot after drag conveyor is disassembled is being carried out, central slot is being cleaned, sandblasting.
According to the design material and thickness of intermediate channel plate in former, corresponding steel plate is selected, new middle plate termination is processed into.
Repair plate in original and do not remove the layout design thickness that part makes the thickness after reparation be not more than plate in original.
The repair mode that plate does not remove part in original is built-up welding or pasting board.
Centering plate carries out removing welding slag burr cusped edge, polishing, spray painting, antirust treatment after middle plate reparation.
Plate does not remove part in plate, including original in intermediate channel after reparation, and plate does not remove the end of part and is welded with original
New middle plate termination.
New middle plate termination is connected to the two ends that plate in original does not remove part.
Plate, which is not removed, in original repair layer on part.
Repair layer is the repair layer or be pasting board that built-up welding is formed.
Relative to prior art, the present invention processes new middle plate termination simultaneously by the way of plate termination in removal abrasion
Welded together with plate remainder in original, and centering plate does not remove part and repaired, such a restorative procedure can be for
The middle plate repaired after middle plate of the wear extent more than 1/3, and reparation is functional, and service life is long.
Brief description of the drawings
Fig. 1 is a kind of flow chart of method of worn of the invention.
Fig. 2 is the structure chart after plate abrasion is repaired in intermediate channel.
Fig. 3 is A-A sectional views in Fig. 2.
Fig. 4 is Fig. 2 side views.
Fig. 5 is plate structure schematic diagram in abrasion intermediate channel.
Fig. 6 is removal lateral side view in plate male and female end in intermediate channel.
Fig. 7 is B-B sectional views in Fig. 6.
Fig. 8 is new middle plate male and female head.
Fig. 9 is Fig. 8 top views.
Figure 10 is plate reparation welding figure in intermediate channel.
Figure 11 is C-C sectional views in Figure 10.
Figure 12 is Figure 10 side views.
Wherein, 1 is middle plate female；2 be repair layer；3 be middle plate male；4 be cell body；5 be that middle plate does not remove part.
Embodiment
As shown in Fig. 1-Figure 12, in order to solve in shortcoming and raising that current middle part groove middle plate of scraper conveyer abrasion is repaired
Service life after plate abrasion is repaired in portion's groove, the present invention proposes plate abrasion in a kind of scraper conveyor middle groove and repaired
Method, drag conveyor includes central slot 4, and it is comprised the following steps：
Step one：Remove the termination of plate and the new middle plate termination of correspondence processing in abrasion；
Step 2：Plate does not remove part during the new middle plate termination of welding and reparation are former.
The termination of middle plate includes middle plate male 3 and middle plate female 4, according to the degree of wear of middle plate, plate in can only removing
One of termination, two terminations of plate in can also removing.Correspondence it can process new behind the termination of plate in removing abrasion
Middle plate termination or the new middle plate termination of correspondence processing while the termination of plate in removing abrasion.
New middle plate end machining well after, in new middle plate termination and middle plate do not remove after part 5 splices, are new
Plate termination does not remove part with middle plate and carries out spot welding, if middle plate does not remove the repair mode selection built-up welding of part, middle plate afterwards
The reparation and new middle plate termination for not removing part do not remove part while being welded, if middle plate does not remove part with middle plate
Repair mode selects pasting board, then middle plate does not remove part after pasting board, carries out new middle plate termination and does not remove part with middle plate
The work of welding.Form repair layer 2 after reparation on plate in not removing.
According to the plate male and female head two ends degree of wear in intermediate channel, in removal the middle plate male of plate length direction serious wear and
Middle plate female, morpheme size, precision and the surface smoothness of the breach after being removed according to the certain means processing of process choice.It is so-called
Serious wear refer to that user thinks serious wear.
According to the design material and thickness of intermediate channel plate in former, suitable steel plate is selected, blanking and processing is gone with original
The same male and female head in the middle plate male and female end removed and other sizes, such as welding groove size, transition chamfer dimesion, mating surface and welding
Reference plane.
Fresh processed middle plate male and female head welding to the corresponding removed position of original middle plate, designed according to intermediate channel
Plate male and female head during size and tolerance in drawing are recovered.
Repairing plate in original and not removing partly makes the thickness after reparation be not more than plate layout design thickness in original.
The morpheme size and tolerance of fresh processed middle plate male and female head remove the morpheme of the breach after male and female head with plate in original
Cooperated between size and tolerance.
Before being repaired to middle part groove middle plate of scraper conveyer abrasion, also start preceding pre-treatment step comprising reparation；Repairing
There is process step after the completion of multiple.
Pre-treatment step has before starting to middle part groove middle plate of scraper conveyer abrasion reparation：Disassemble, clean, sandblasting, survey
Amount.Disassemble and refer to disassemble the equipment of drag conveyor, the head, tail drag conveyor are unloaded down, the gear of intermediate channel
Plate etc. is removed, only remaining intermediate channel cell body.Have repairing post-processing step to middle part groove middle plate of scraper conveyer abrasion：Defluxing
Slag burr cusped edge, polishing, spray painting, antirust.
Technical scheme is described in detail with reference to specific embodiment：
The present embodiment is by taking a width of 1200mm the middle pan of scraper conveyor in groove as an example, and thickness of slab 45mm in original design, bottom plate is thick
30mm, groove inner width 1200mm.Residual thickness after plate abrasion in measurement intermediate channel, the thick measurement data in middle plate male and female end has：19mm、
20mm, 21mm, 20.5mm, 18mm, 21.3mm, middle plate interior thickness measurement data have 25mm, 26mm, 27mm, 24.5mm,
26.6mm、27.3mm.Learnt according to measured middle plate residual thickness and abrasion distribution situation, middle plate male and female head two ends abrasion is tight
Abrasion is not very serious, residual thickness about 26mm relatively in the middle of weight, residual thickness averagely about 20mm, middle plate.As shown in Figure 5.
Abrasion intermediate channel according to the existing agreement of acquiescence in industry can be repaired for the condition of reparation, and report has been reached completely
Useless condition.And the restorative procedure according to described by this programme is recoverable.With reference to the reparation side described by this programme
Method is described and illustrated in detail the repair process and step of plate in the intermediate channel of the abrasion with regard to embodiment 1.
Reparation starts preceding pretreatment：The middle pan of scraper conveyor is carried out：Disassemble, clean, sandblasting；Measurement is analyzed and provided
The design that following middle plate male and female heads are changed.
Step one：Rule at the middle plate male and female head two ends of cleaning according to design, cutting removes plate male and female in the abrasion
Head two ends, the wear surface of plate remainder in processing makes the thickness of middle plate remainder meet the design drawing requirement of maintenance program
（23mm）；Breach after plate male and female of polishing head removal, it is ensured that the morpheme size of breach reaches that middle plate repairs the size of design
And required precision.As Figure 6-Figure 7.
Step 2：According to the design drawing of the middle plate male and female head in middle plate maintenance program, production meets the new of design drawing requirement
Middle plate male and female head.As illustrated in figs. 8-9.
Step 3：Fresh processed middle plate male and female head welding to the corresponding removed position of original middle plate, according to middle part
In maintenance design drawing in groove in plate maintenance program construct, according to meet design drawing requirement recover in plate male and female head.Such as Figure 10-
Shown in Figure 12.
Step 4：Repair plate in original and do not remove part.The hollowed-out board that the present embodiment 1 selects 4 pieces of 20mm thick is fitted in middle plate
On the machined surface for not removing position, constructed according to the repair capsule figure in middle plate maintenance program.As shown in Figure 10-Figure 12.
Middle plate reparation post processing：Repairing post-processing step to middle part groove middle plate of scraper conveyer abrasion has welding slag burr point
Rib, polishing, spray painting, antirust.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (10)
1. middle part groove middle plate of scraper conveyer method of worn, drag conveyor includes central slot, it is characterised in that：Comprising
Following steps：
Step one：Remove the termination of plate and the new middle plate termination of correspondence processing in abrasion；
Step 2：Plate does not remove part during the new middle plate termination of welding and reparation are former.
2. middle part groove middle plate of scraper conveyer method of worn according to claim 1, it is characterised in that：Scraped
Plate conveyer remaining central slot after disassembling, is cleaned, sandblasting to central slot.
3. middle part groove middle plate of scraper conveyer method of worn according to claim 1, it is characterised in that：According to middle part
The design material and thickness of plate, select corresponding steel plate, are processed into new middle plate termination during groove is former.
4. middle part groove middle plate of scraper conveyer method of worn according to claim 1, it is characterised in that：Repair in original
Plate does not remove the layout design thickness that part makes the thickness after reparation be not more than plate in original.
5. middle part groove middle plate of scraper conveyer method of worn according to claim 4, it is characterised in that：Plate does not have in original
Have and remove the repair mode of part for built-up welding or pasting board.
6. middle part groove middle plate of scraper conveyer method of worn according to claim 1, it is characterised in that：Middle plate reparation
Centering plate carries out removing welding slag burr cusped edge, polishing, spray painting, antirust treatment afterwards.
7. the middle part groove middle plate of scraper conveyer method of worn in application claim 1-6 described in any claim is repaired
Plate in intermediate channel afterwards, it is characterised in that：Part is not removed including plate in original, and plate does not remove the end of part and is welded with newly in original
Middle plate termination.
8. plate in intermediate channel after reparation according to claim 7, it is characterised in that：New middle plate termination is connected to plate in original
The two ends of part are not removed.
9. plate in the intermediate channel after a kind of reparation according to claim 7, it is characterised in that：Plate does not remove part in original
On have repair layer.
10. plate in the intermediate channel after a kind of reparation according to claim 9, it is characterised in that：Repair layer is formed for built-up welding
Repair layer or for pasting board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418974.5A CN107225360A (en) | 2017-06-06 | 2017-06-06 | Plate in intermediate channel after the middle pan of scraper conveyor method of worn and reparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418974.5A CN107225360A (en) | 2017-06-06 | 2017-06-06 | Plate in intermediate channel after the middle pan of scraper conveyor method of worn and reparation |
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| Publication Number | Publication Date |
|---|---|
| CN107225360A true CN107225360A (en) | 2017-10-03 |
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| CN201710418974.5A Pending CN107225360A (en) | 2017-06-06 | 2017-06-06 | Plate in intermediate channel after the middle pan of scraper conveyor method of worn and reparation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340620A (en) * | 2019-07-17 | 2019-10-18 | 河南省煤科院耐磨技术有限公司 | A kind of scraper conveyor scraper restorative procedure |
| CN110695609A (en) * | 2019-09-30 | 2020-01-17 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | Scraper transplanting, reproducing and repairing method for scraper conveyor |
| US11155419B1 (en) * | 2019-05-21 | 2021-10-26 | China University Of Mining And Technology | Dynamic reliability evaluation method for coupling faults of middle trough of scraper conveyor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2096155C1 (en) * | 1996-04-09 | 1997-11-20 | Акционерное общество "Новолипецкий металлургический комбинат" | Method of repairing parts |
| CN102091906A (en) * | 2010-12-22 | 2011-06-15 | 北京工业大学 | Method for repairing central slot of scraper conveyor |
| CN103341720A (en) * | 2013-07-16 | 2013-10-09 | 烟台开发区蓝鲸金属修复有限公司 | Repairing method for middle trough of scraper conveyer |
| CN104827167A (en) * | 2015-05-19 | 2015-08-12 | 山东能源重型装备制造集团有限责任公司 | Reproducing method for scraper conveyor |
| CN104894556A (en) * | 2015-05-19 | 2015-09-09 | 山东能源重型装备制造集团有限责任公司 | Remanufacturing method of scraper conveyor |
| CN104911583A (en) * | 2015-05-19 | 2015-09-16 | 山东能源重装集团大族再制造有限公司 | Scraper conveyor re-manufacturing method |
| CN105458611A (en) * | 2015-12-11 | 2016-04-06 | 山东能源重型装备制造集团有限责任公司 | Repair method for scraper conveyor middle pan |
| CN106334900A (en) * | 2016-10-27 | 2017-01-18 | 辽宁工程技术大学 | Overlaying welding repair method used for worn middle plate of middle slot of scraper conveyer |
-
2017
- 2017-06-06 CN CN201710418974.5A patent/CN107225360A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2096155C1 (en) * | 1996-04-09 | 1997-11-20 | Акционерное общество "Новолипецкий металлургический комбинат" | Method of repairing parts |
| CN102091906A (en) * | 2010-12-22 | 2011-06-15 | 北京工业大学 | Method for repairing central slot of scraper conveyor |
| CN103341720A (en) * | 2013-07-16 | 2013-10-09 | 烟台开发区蓝鲸金属修复有限公司 | Repairing method for middle trough of scraper conveyer |
| CN104827167A (en) * | 2015-05-19 | 2015-08-12 | 山东能源重型装备制造集团有限责任公司 | Reproducing method for scraper conveyor |
| CN104894556A (en) * | 2015-05-19 | 2015-09-09 | 山东能源重型装备制造集团有限责任公司 | Remanufacturing method of scraper conveyor |
| CN104911583A (en) * | 2015-05-19 | 2015-09-16 | 山东能源重装集团大族再制造有限公司 | Scraper conveyor re-manufacturing method |
| CN105458611A (en) * | 2015-12-11 | 2016-04-06 | 山东能源重型装备制造集团有限责任公司 | Repair method for scraper conveyor middle pan |
| CN106334900A (en) * | 2016-10-27 | 2017-01-18 | 辽宁工程技术大学 | Overlaying welding repair method used for worn middle plate of middle slot of scraper conveyer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11155419B1 (en) * | 2019-05-21 | 2021-10-26 | China University Of Mining And Technology | Dynamic reliability evaluation method for coupling faults of middle trough of scraper conveyor |
| CN110340620A (en) * | 2019-07-17 | 2019-10-18 | 河南省煤科院耐磨技术有限公司 | A kind of scraper conveyor scraper restorative procedure |
| CN110695609A (en) * | 2019-09-30 | 2020-01-17 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | Scraper transplanting, reproducing and repairing method for scraper conveyor |
| CN110695609B (en) * | 2019-09-30 | 2023-01-03 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | Scraper transplanting, reproducing and repairing method for scraper conveyor |
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Application publication date: 20171003 |
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