CN206622577U - A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls - Google Patents
A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls Download PDFInfo
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- CN206622577U CN206622577U CN201720308092.9U CN201720308092U CN206622577U CN 206622577 U CN206622577 U CN 206622577U CN 201720308092 U CN201720308092 U CN 201720308092U CN 206622577 U CN206622577 U CN 206622577U
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Abstract
A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls, including lower section flange external mold, flange section external mold through walls, transition segment external mold, upper section flange external mold, steel pipe skeleton, excessive nodal pattern core, die joint positioning table, flange through walls, screw rod etc., screw rod is set on lower platen, and fixed with nut in lower platen bottom, nodal pattern core and core adapter sleeve and flange through walls under being set on lower platen, flange section external mold through walls is set on lower section flange external mold, transition segment external mold and upper section flange external mold are set on flange section external mold through walls, in the right middle of lower nodal pattern core, ingate is set, in the right part of lower nodal pattern core, excessive nodal pattern core and die joint positioning table are set.The utility model horizontal parting, vertical riser vacuum-assist pouring, improve shaping qualification rate; quality is more reliable, and pressure cast makes alloy structure finer and close, beneficial to environmental protection; dust all reclaims, and green casting is really realized, applied in metal entirety casting technology field technical field.
Description
Technical field
It the utility model is related to a kind of double plate flange in metal entirety casting technology field technical field and flange through walls
Spheroidal graphite cast-iron straight tube, spheroidal graphite cast-iron double plate flange straight tube monoblock cast through walls more particularly to more than DN100-DN200 × 3 meter.
Background technology
The double flange straight tubes of spheroidal graphite cast-iron and dual coil pipes through walls majority for being presently used for pressure-bearing use welding manufacture technique.By
Limited in by cast iron welding material, welding position is " heterogeneous " weld seam, because weld seam is different from basic material, plus weld seam
The interference of heat affected area, the mechanical performance of welded flange pipe are extremely difficult to standard requirement.By ISO2531；2009 international standards and
GB/T13295-2013 national Specifications, DN40-DN1000 ductile iron pipe minimum tensile strength are 420MPa, elongation percentage
>=10%, welded flange weld strength typically between 180-220MPa, elongation percentage between 2-5%, less than standard 1 again with
On.Show as in actual applications；Heat affected zone and metallographic structure influence, and stress concentration, weld seam fragility is big, not impact resistance,
Fracture easily is snapped, is being stored in a warehouse, is transported, installation, repeatedly occurs accident during use, therefore, user's active demand block cast flange
Pipe.
The current block cast flanged pipe in China is most to use ordinary sand casting and lost foam casting.Wherein ordinary sand casting is deposited
Subject matter be that thickness of pipe wall is uneven, flexural deformation；Subject matter is existing for lost foam casting, and slag inclusion, stomata is more,
Water pressure test water leakage ratio is big.In particular, caliber specification is smaller, and length is longer, and the probability that drawbacks described above be present is got over
Greatly, below DN200, flanged pipe of the length more than 2 meters are difficult block cast shaping, even if shaping, qualification rate is also very low, can not meet
The market demand.Therefore, it is always new class anxious to be resolved to develop a kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls
Topic.
The content of the invention
The purpose of this utility model is to provide a kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls, the utility model
Welded flange pipe is substituted with spheroidal graphite cast-iron block cast flanged pipe, block cast of flange pipe shaft shaping, fully meets national GB/
T13295-2013, international ISO2531, the requirement of 2009 standards, effectively reduce security risk, improve product service life.
What the purpose of this utility model was realized in：A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls, including
Lower section flange external mold, flange section external mold through walls, transition segment external mold, upper section flange external mold, upper nodal pattern core, steel pipe skeleton, top board,
Sprue, nut, excessive nodal pattern core, die joint positioning table, ingate, flange through walls, core adapter sleeve, lower nodal pattern core, screw rod,
Lower platen, screw rod is set on lower platen, and fixed with nut in lower platen bottom, nodal pattern core and type under being set on lower platen
Core adapter sleeve and flange through walls, flange section external mold through walls is set on lower section flange external mold, set on flange section external mold through walls
Transition segment external mold and upper section flange external mold, set ingate in the right middle of lower nodal pattern core, were set in the right part of lower nodal pattern core
Nodal pattern core and die joint positioning table are spent, sprue is set among excessive nodal pattern core and die joint positioning table, in lower nodal pattern core
Top sets upper nodal pattern core and steel pipe skeleton, sets top board on the top of screw rod, and fixed on top board top with nut.
The structure of the present utility model for being characterized by it.Its operation principle and using operating method it is：Utilize phenolic resin
Cold-box core blower is segmented moulding, and coremaking, according to core shooter work top and flanged pipe length specification, design section length is 0,
5 meters；It is high using phenol resin sand hardness, the characteristics of intensity is big, by type and core longitudinal stack to user to flanged pipe needed length,
Arbitrarily selected in 3,5 meters of length；Type is completed with type Fold additon location by the concavo-convex platform of itself, not only improves cast exhaust, again
Can anti-leak-stopping iron；Sprue, ingate are molded simultaneously with casting mold, realize that ladder is poured into a mould；Flanged pipe through walls is by adjusting casting mold mould
Tool, flange is placed in the optional position that user specifies；Platform case when the casting mold of superposition is prevents cast, locked with special fastening device
Fasten；It is to prevent flue dust diffusion pollution environment during cast, casting mold is placed in negative-pressure flask, is buried and vacuumized with dry sand,
Waste gas is sent into deduster using negative pressure；It is superimposed and is poured into a mould using more piece casting mold, is realized small-bore long flanged pipe block cast, overcome other
Casting method and the casting flaw of welded flange are more, and ratio of briquetting is low, metallographic, the problems such as performance is not up to standard；Using small-sized core shooter,
Small-bore long flanged pipe block cast is realized, saves equipment investment and mould, frock investment cost；The mold design of " building block system " is full
Sufficient different length specification, different pressures grade, the demand of different flange positions through walls；Horizontal parting, vertical riser vacuum-assist pouring,
Shaping qualification rate and a hydraulic pressure qualification rate are improved, shaping qualification rate, up to 92%, is up to 98%, hydraulic pressure qualification rate
2-3 times of ordinary sand casting, lost foam casting, production efficiency are up to 5 times, realize and produce in enormous quantities, meet the market demand；It is whole
Integral flange and flange through walls are cast compared with welded flange, and mechanical performance doubles, and overall metallographic structure is completely the same, quality
More reliable, user is more satisfied；Vacuum-assist pouring not only makes alloy structure finer and close, is more beneficial for environmental protection, caused by cast
Waste gas, dust all reclaim, and really realize green casting.
A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls compared with prior art, have horizontal parting, vertical rank
Terraced vacuum-assist pouring, shaping qualification rate and a hydraulic pressure qualification rate are improved, shaping qualification rate can up to 98%, hydraulic pressure qualification rate
Up to 92%, be ordinary sand casting, 2-3 times of lost foam casting, production efficiency is up to 5 times, realizes and produces in enormous quantities, meets city
Field demand, the flange and flange through walls of block cast one are compared with welded flange, and mechanical performance doubles, and overall metallographic structure is complete
Unanimously, quality is more reliable, and user is more satisfied, and vacuum-assist pouring not only makes alloy structure finer and close, is more beneficial for environmental protection, cast
In caused waste gas, dust all reclaim, the advantages that really realizing green casting, metal will be widely used in and integrally cast
Make in technical field technical field.
Brief description of the drawings
Below in conjunction with the accompanying drawings and the utility model is described in detail embodiment.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that double plate flanged pipe product is cast with the utility model casting method.
Fig. 3 is the structural representation that single-deck flanged pipe product through walls is cast with the utility model casting method.
Fig. 4 is the structural representation that welding double plate flanged pipe product is cast with the utility model casting method.
Fig. 5 is the structural representation that double plate flanged pipe product through walls is cast with the utility model casting method.
Fig. 6 is to cast double structural representations for being inserted through wall flanged pipe product with the utility model casting method.
Fig. 7 is the structural representation that welding single-deck flanged pipe product through walls is cast with the utility model casting method.
Fig. 8 is that the present invention is the structural representation that model race is put into vacuum sand box.
Embodiment
Referring to the drawings, a kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls, including lower section flange external mold 1, method through walls
Orchid section external mold 2, transition segment external mold 3, upper section flange external mold 4, upper nodal pattern core 5, steel pipe skeleton 6, top board 7, sprue 8, nut
9th, excessive nodal pattern core 10, die joint positioning table 11, ingate 12, flange through walls 13, core adapter sleeve 14, lower nodal pattern core 15, spiral shell
Bar 16, lower platen 17, screw rod 16 is set on lower platen 17, and fixed with nut 9 in the bottom of lower platen 17, on lower platen 17
Lower nodal pattern core 15 and core adapter sleeve 14 and flange through walls 13 are set, flange section external mold through walls is set on lower section flange external mold 1
2, transition segment external mold 3 and upper section flange external mold 4 are set on flange section external mold 2 through walls, set in the right middle of lower nodal pattern core 15
Ingate 12, excessive nodal pattern core 10 and die joint positioning table 11 are set in the right part of lower nodal pattern core 15, in the excessive He of nodal pattern core 10
Sprue 8 is set among die joint positioning table 11, nodal pattern core 5 and steel pipe skeleton 6 are set on the top of lower nodal pattern core 15, in spiral shell
The top of bar 16 sets top board 7, and is fixed with nut 9 on the top of top board 7.
A kind of described double plate flange and the operation principle of flange spheroidal graphite cast-iron straight tube block cast technology through walls and use operation
Method is：Moulding, coremaking, according to core shooter work top and flanged pipe length scale are segmented using phenolic resin cold-box core blower
Lattice, design section length are 0,5 meters；It is high using phenol resin sand hardness, the characteristics of intensity is big, by type and core longitudinal stack to use
Family is arbitrarily selected in 3,5 meters of length flanged pipe needed length；Type is completed with type Fold additon location by the concavo-convex platform of itself,
Cast exhaust is not only improved, again can anti-leak-stopping iron；Sprue, ingate are molded simultaneously with casting mold, realize that ladder is poured into a mould；Method through walls
Blue pipe is placed in the optional position that user specifies by adjusting mold die, by flange；The platform when casting mold of superposition is prevents cast
Case, it is locked with special fastening device；It is to prevent flue dust diffusion pollution environment during cast, casting mold is placed in negative-pressure flask,
Buried and vacuumized with dry sand, waste gas is sent into deduster using negative pressure；It is superimposed and is poured into a mould using more piece casting mold, realizes osculum path length
Flanged pipe block cast, overcomes that the casting flaw of other casting methods and welded flange is more, and ratio of briquetting is low, metallographic, and performance is not up to standard etc.
Problem；Using small-sized core shooter, small-bore long flanged pipe block cast is realized, saves equipment investment and mould, frock investment cost；
The mold design of " building block system ", meet different length specification, different pressures grade, the demand of different flange positions through walls；It is horizontal
Parting, vertical riser vacuum-assist pouring, shaping qualification rate and a hydraulic pressure qualification rate are improved, shaping qualification rate is up to 98%, one
Secondary hydraulic pressure qualification rate up to 92%, be ordinary sand casting, 2-3 times of lost foam casting, production efficiency is up to 5 times, realizes big
Batch production, meets the market demand；Compared with welded flange, mechanical performance doubles the flange and flange through walls of block cast one,
Overall metallographic structure is completely the same, and quality is more reliable, and user is more satisfied；Vacuum-assist pouring not only makes alloy structure finer and close, more has
Beneficial to environmental protection, caused waste gas in cast, dust all reclaims, and really realizes green casting.
A kind of described double plate flange and the casting method of flange spheroidal graphite cast-iron straight tube block cast technology through walls are：
（1）Mould prepares：Ring flange on pipe shaft can freely be replaced by PN10, PN16, PN25, and PN values are different
（Pressure rating）, the thickness of flange, bolt aperture, hole count is also different.Flange position through walls is completed by adjusting length of straight pipe
's；
（2）Model cluster is prepared using core shooter；The phenol resin sand being blended is injected in mold cavity, triethylamine is blown and consolidates
Chemical conversion type, it is standby after the demoulding；
（3）It is superimposed assembling model cluster and core；The model cluster longitudinal stack prepared is assembled, two halves core is wrapped in steel
On cannon born frame, junction portion is coupled with resin sand set socket joint.
（4）The model cluster assembled is utilized into fixture locking；Fixture is to be fastened by upper lower platen with stay bolt；
（5）The model cluster locked is placed in negative-pressure flask；Negative-pressure flask is provided with vacuum-pumping tube, in vacuum pump work
Adjustment control valve, control vacuum magnitude；
（6）Dry sand and ram-jolt are filled, is vacuumized after overlay film；The process for filling dry sand is the ram-jolt in back-up sand, and sandbox fills up
Afterwards in upper surface plastic covering diaphragm seal, consolidation molding sand is vacuumized；
（7）By in the molten iron prepared under negative pressure injection model；Being poured into a mould under -0,7Pa pressure not only makes alloy structure
It is finer and close and more environmentally friendly；
（8）Cooling, unpack；Close negative pressure within 6 minutes after cast, natural cooling is taken out after 2 hours, by casting from sandbox；
（9）Sand removal reconditioning；Ball blast sand removal is carried out to casting, reconditioning burr, detects outward appearance and size qualification；
（10）Machining；Process flange seal waterline；
（11）Preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
（12）Packaging, storage, packed after spraying shipping mark, be put in storage ready for delivery.
Embodiment one
PN16,3 meters of length are cast, DN150 double plate flange straight tube methods are：
（1）Mould prepares
A, outer mold prepares；Prepare DN150, flange outer mold, transition segment outer mold, upper section flange external mold are saved under PN16
Tool.
B, core mold prepares；Upper nodal pattern core mold, excessive nodal pattern core mold, lower nodal pattern core mold, core connection cover die
Tool.
（2）Moulding and coremaking
Model cluster is prepared using core shooter；The phenol resin sand being blended is injected into external mold and core mold die cavity respectively
In, triethylamine curing molding is blown, it is standby after the demoulding.Wherein exterior mold portion includes；Upper section flange external mold 1 saves, transition segment external mold 4
Section, upper section flange external mold 1 save.Core includes；Upper nodal pattern core 1 saves, excessive nodal pattern core 4 saves, and lower nodal pattern core 1 saves, core adapter sleeve 5
It is individual.
（3）Built-up pattern cluster
The external mold for being segmented manufacture and core are combined, process and method are；External mold is first combined, sequentially from the bottom to top,
The positioning step carried using die joint is positioned.The combination of core is synchronous with outer die combination to be carried out, and core model cluster is that combination exists
On core frame, method be the pellet bag by two semicircles on core frame, set upper core adapter sleeve fix.Only remained when external mold is combined to
During upper section, the good core of complete combination is inserted in lower section external mold positioning hole, finally saves external mold in combination.Either external mold is still
Core junction need to use joint sealing cream adhering and sealing, prevent from leaking iron during cast.
（4）Fastening
Model is compressed using upper lower platen and bolt, it is therefore an objective to prevent that platform case leaks iron caused by molten iron pressure during cast,
Another effect is easy for lifting and carried.
（5）The model cluster locked is placed in negative-pressure flask；Negative-pressure flask is provided with vacuum-pumping tube, in vacuum pump work
Adjustment control valve, control vacuum magnitude.
（6）Dry sand and ram-jolt are filled, is vacuumized after overlay film；The process for filling dry sand is the ram-jolt in back-up sand, and sandbox fills up
Afterwards in upper surface plastic covering diaphragm seal, consolidation molding sand is vacuumized.
（7）By in the molten iron prepared under negative pressure injection model；Being poured into a mould under -0,7Pa pressure not only makes alloy structure
It is finer and close and more environmentally friendly.
（8）Cooling, unpack；Close negative pressure within 6 minutes after cast, natural cooling is taken out after 2 hours, by casting from sandbox.
（9）Sand removal reconditioning；Ball blast sand removal is carried out to casting, reconditioning burr, detects outward appearance and size qualification；
（10）Machining；Process flange seal waterline.
（11）Preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified.
（12）Packaging, storage, packed after spraying shipping mark, be put in storage ready for delivery.
Embodiment two
PN10,2.5 meters of length are cast, DN100 disks are inserted with flange straight tube through walls, 1 meter of flange distance single-deck flange through walls, method
It is：
（1）Mould prepares
A, outer mold prepares；Prepare DN100, lower section socket outer mold, transition segment outer mold, save flange external mold on PN10
Tool, flange section outer mold through walls.
B, core mold prepares；Upper nodal pattern core mold, excessive nodal pattern core mold, lower nodal pattern core mold, core connection cover die
Tool.
（2）Moulding and coremaking
Model cluster is prepared using core shooter；The phenol resin sand being blended is injected into external mold and core mold die cavity respectively
In, triethylamine curing molding is blown, it is standby after the demoulding.Wherein exterior mold portion includes；Upper section flange external mold 1 saves, 0.5 meter of length.Cross
Cross section external mold 3 save, wherein 0.25 meter 2 of length section, 0.5 meter of 1 section.Lower section socket external mold 1 saves, 0.5 meter of length.Flange external mold through walls
1 section, 0.5 meter of length.Core includes；Upper nodal pattern core 1 saves, excessive nodal pattern core 3 saves, and lower nodal pattern core 1 saves, core adapter sleeve 4.
（3）Built-up pattern cluster
The external mold for being segmented manufacture and core are combined, process and method are；External mold is first combined, sequentially from the bottom to top,
The positioning step carried using die joint is positioned.The combination of core is synchronous with outer die combination to be carried out, and core model cluster is that combination exists
On core frame, method be the pellet bag by two semicircles on core frame, set upper core adapter sleeve fix.Only remained when external mold is combined to
During upper section, the good core of complete combination is inserted in lower section external mold positioning hole, finally saves external mold in combination.Either external mold is still
Core junction need to use joint sealing cream adhering and sealing, prevent from leaking iron during cast.
（4）Fastening
Model is compressed using upper lower platen and bolt, it is therefore an objective to prevent that platform case leaks iron caused by molten iron pressure during cast,
Another effect is easy for lifting and carried.
（5）The model cluster locked is placed in negative-pressure flask；Negative-pressure flask is provided with vacuum-pumping tube, in vacuum pump work
Adjustment control valve, control vacuum magnitude.
（6）Dry sand and ram-jolt are filled, is vacuumized after overlay film；The process for filling dry sand is the ram-jolt in back-up sand, and sandbox fills up
Afterwards in upper surface plastic covering diaphragm seal, consolidation molding sand is vacuumized.
（7）By in the molten iron prepared under negative pressure injection model；Being poured into a mould under -0,7Pa pressure not only makes alloy structure
It is finer and close and more environmentally friendly.
（8）Cooling, unpack；Close negative pressure within 6 minutes after cast, natural cooling is taken out after 2 hours, by casting from sandbox.
（9）Sand removal reconditioning；Ball blast sand removal is carried out to casting, reconditioning burr, detects outward appearance and size qualification；
（10）Machining；Process flange seal waterline.
（11）Preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified.
（12）Packaging, storage, packed after spraying shipping mark, be put in storage ready for delivery.
The present invention is further discussed below with reference to embodiment：
Reference picture 8, A represents to remove vavuum pump in Fig. 8.Structure when model race is put into vacuum sand box, in negative-pressure flask
Negative-pressure vacuum pipe 21 and valve 22 are set on 23, model race 18 is set in negative-pressure flask 23, is set at the middle part of negative-pressure flask 23
Dry sand 20, plastic sheeting 19 is set on negative-pressure flask 23.
Claims (1)
1. a kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls, including lower section flange external mold, flange section external mold through walls, transition
It is fixed to save external mold, upper section flange external mold, upper nodal pattern core, steel pipe skeleton, top board, sprue, nut, excessive nodal pattern core, die joint
Position platform, ingate, flange through walls, core adapter sleeve, lower nodal pattern core, screw rod, lower platen, it is characterised in that：Set on lower platen
Screw rod is put, and is fixed with nut in lower platen bottom, nodal pattern core and core adapter sleeve and flange through walls under being set on lower platen,
Flange section external mold through walls is set on lower section flange external mold, transition segment external mold and upper section flange are set on flange section external mold through walls
External mold, ingate is set in the right middle of lower nodal pattern core, excessive nodal pattern core and die joint positioning is set in the right part of lower nodal pattern core
Platform, sprue is set among excessive nodal pattern core and die joint positioning table, nodal pattern core and steel are set on the top of lower nodal pattern core
Cannon born frame, top board is set on the top of screw rod, and fixed with nut on top board top.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720308092.9U CN206622577U (en) | 2017-03-28 | 2017-03-28 | A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720308092.9U CN206622577U (en) | 2017-03-28 | 2017-03-28 | A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls |
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| Publication Number | Publication Date |
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| CN206622577U true CN206622577U (en) | 2017-11-10 |
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|---|---|---|---|
| CN201720308092.9U Active CN206622577U (en) | 2017-03-28 | 2017-03-28 | A kind of double plate flange and flange spheroidal graphite cast-iron straight tube through walls |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112045152A (en) * | 2020-08-06 | 2020-12-08 | 宁波拓铁机械有限公司 | Casting method and casting structure of large thick-section cylinder barrel ductile iron piece |
-
2017
- 2017-03-28 CN CN201720308092.9U patent/CN206622577U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112045152A (en) * | 2020-08-06 | 2020-12-08 | 宁波拓铁机械有限公司 | Casting method and casting structure of large thick-section cylinder barrel ductile iron piece |
| CN112045152B (en) * | 2020-08-06 | 2021-08-17 | 宁波拓铁机械有限公司 | Casting method and casting structure of large thick-section cylinder barrel ductile iron piece |
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