CN211248283U - Casting mould of super-thick large nodular cast iron storage and transportation container - Google Patents
Casting mould of super-thick large nodular cast iron storage and transportation container Download PDFInfo
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- CN211248283U CN211248283U CN201922189698.7U CN201922189698U CN211248283U CN 211248283 U CN211248283 U CN 211248283U CN 201922189698 U CN201922189698 U CN 201922189698U CN 211248283 U CN211248283 U CN 211248283U
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Abstract
The utility model relates to a casting mould of super thick big nodular cast iron warehousing and transportation container belongs to super thick big nodular cast iron and makes technical field. The sand box comprises a bottom box and a plurality of pouring boxes, wherein a bottom box pouring gate is arranged in the bottom box, a straight pouring gate pipeline is arranged in each pouring box, and the pouring boxes are respectively arranged on the bottom box; a mud core is arranged in the bottom box, a metal type unit is sleeved on the mud core, a profiling cavity is formed between the mud core and the metal type unit, and the metal type unit is fixed on the bottom box; a water cooling device is arranged on the metal mold unit; one end of the rapid cooling system is communicated with the mud core, and the other end of the rapid cooling system is connected with the air pumping/blowing device; an anti-expansion locking device is arranged between the metal unit and the bottom box. The method shortens the eutectic solidification time, improves the compactness of the casting, obtains a product with high performance and zero shrinkage porosity, and meets the requirement of ultrasonic detection; but also prevents the casting from generating the defects of slag inclusion, cold shut and the like; the magnetic powder detection requirement is met.
Description
Technical Field
The utility model relates to a casting mould of super thick big nodular cast iron warehousing and transportation container belongs to super thick big nodular cast iron and makes technical field.
Background
In recent years, with the large-scale development of nuclear power, hydroelectric power and wind power generating sets and the heavy development of other engineering mechanical equipment, the demand for ultra-thick and large ductile cast iron is more and more urgent. Developed countries abroad have a higher level in producing super-thick large ductile iron castings. The company Siempelkamp, germany, produced a ductile iron punch holder with a wall thickness of up to 630mm as early as 1983, and france and japan developed ductile iron castings with a wall thickness of more than 400mm in succession. The nuclear spent fuel nodular cast iron storage and transportation container has the advantages of complex structure, harsh technical conditions and severe environmental conditions, represents the highest level of the world nodular cast iron production, and the German Thyssen successfully produces the N1300 nuclear spent fuel nodular cast iron tank with the weight of 115 tons and the wall thickness of 400 mm.
At present, in the national standard GB/T1348-2009 nodular iron casting and the European standard DIN EN 1563:2012 nodular cast iron, the wall thickness specification of nodular cast iron is defined to 200mm, and no clear detection requirement exists for ultra-thick nodular cast iron with the wall thickness exceeding 200 mm. The mechanical property of the super-thick large nodular cast iron hot spot part or the central part is reduced due to the fact that the solidification speed is slow, the solidification time is long, the structural defects of abnormal graphite, shrinkage porosity, shrinkage cavity and the like often occur, and particularly, the performance deterioration is obvious due to the generation of the broken graphite. Aiming at spheroidal graphite cast iron containing parts with the wall thickness exceeding 500mm, such as nuclear spent fuel container tanks and the like, the technical requirements of the parts are as follows: the casting has zero defects of ultrasonic flaw detection and magnetic particle flaw detection; and the ultrasonic flaw detection of the ultra-thick large ductile iron storage and transportation container is a technical difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a casting mould of big nodular cast iron warehousing and transportation container of super-thick is provided to above-mentioned prior art, avoids above-mentioned technical short slab for the casting mould satisfies ultrasonic inspection, magnetic inspection's requirement.
The utility model provides a technical scheme that above-mentioned problem adopted does: a casting mold of an ultra-thick large ductile cast iron storage and transportation container comprises a sand box, a metal mold unit and a rapid cooling system, wherein the sand box comprises a bottom box and a plurality of pouring boxes, a bottom box pouring channel is arranged in the bottom box, a sprue channel is arranged in each pouring box, and the plurality of pouring boxes are respectively arranged on the bottom box to realize the communication between the sprue channel and the bottom box pouring channel; a mud core is arranged in the bottom box, a metal type unit is sleeved on the mud core, a profiling cavity of the super-thick large nodular cast iron storage and transportation container is formed between the mud core and the metal type unit, and the metal type unit is fixed on the bottom box to realize the communication of the profiling cavity and a pouring channel of the bottom box; the metal mold unit is provided with a water cooling device for cooling the metal mold unit; one end of the rapid cooling system is communicated with the mud core, and the other end of the rapid cooling system is connected with the air pumping/supplying device, so that the mud core is cooled; an anti-expansion locking device is arranged between the metal unit and the bottom box.
The mud core comprises a mud core support and a chilling unit, the mud core support is vertically fixed on the bottom box, the chilling block support is sleeved on the mud core support, the chilling unit is coated on the chilling block support, and sand mud is filled between the chilling block support and the mud core support.
The bottom of the chilling block support is annularly provided with a plurality of supporting blocks for supporting the chilling block unit; the chill support is provided with a plurality of mounting holes arranged at intervals along the shaft collar, and bolts penetrate through the mounting holes to realize connection of the chill support and the chill unit.
The chilling block unit comprises an annular chilling block and a chilling block cover, wherein the chilling block cover is arranged at the top end of the annular chilling block and is fixedly connected with the mud core support.
The chilling block cover comprises an outer ring chilling block and an inner ring chilling block, the outer ring chilling block is clamped on the cover plate in the circumferential direction, and the inner ring chilling block is laid on the inner side of the outer ring chilling block.
The rapid cooling system comprises an air suction pipeline and an air supply pipeline, the air suction pipeline and the air supply pipeline are respectively arranged in the sand box, a plurality of air cooling holes are formed in the chill support, and the air suction pipeline and the air supply pipeline are respectively communicated with the corresponding air cooling holes.
The water cooling device comprises a water-cooled tube and a nozzle, the water-cooled tube is embraced in the metal type unit, the nozzle is annularly arranged on the water-cooled tube, and a valve used for adjusting the shape of water is arranged on the water-cooled tube.
The anti-expansion locking device comprises a weight and an anchor ear, the weight is pressed at the top end of the metal type unit, and the anchor ear is fixedly connected with the bottom box and the metal type unit.
The metal mold unit comprises a plurality of metal molds which are arranged in an overlapped mode and fixedly connected respectively, and a casting body riser is arranged on the metal molds at the top.
The pouring gate box is provided with a seat bag, and the seat bag is communicated with the pouring gate.
Compared with the prior art, the utility model has the advantages of: a casting mould of an ultra-thick large ductile cast iron storage and transportation container is characterized in that a chilling block unit and a metal mould unit are respectively cooled, so that the continuous chilling capability of the chilling block and the metal mould is improved, the eutectic solidification time is shortened, and the compactness of a casting is improved; the weight is placed on the top metal mold, the anchor ear fastens the bottom box and the metal mold unit firmly, the graphitized expansion in the pouring process is prevented from lifting the box, and the problems of shrinkage porosity, box ejection and the like of the super-thick large nodular cast iron storage and transportation container are avoided, so that a high-performance and zero-shrinkage porosity product is obtained, and the ultrasonic detection requirement is met. Two bottom pouring type pouring systems are adopted to pour the profiling cavity at the same time, so that the iron liquid is fully stood, slag inclusion floating is facilitated, the use of filter discs is reduced, and the production cost is reduced; the pouring process is stable, and the defects of slag inclusion, cold shut and the like of the casting are prevented; the magnetic powder detection requirement is met.
Drawings
FIG. 1 is a schematic diagram of a hundred-ton grade spent fuel spheroidal graphite cast iron container;
FIG. 2 is a schematic view of a casting mold (with weights and anchor ears removed) of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
FIG. 3 is a schematic view of a casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
FIG. 4 is a longitudinal sectional view of a casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
FIG. 5 is a schematic view of a casting mold (with sand box removed) of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
FIG. 6 is a top view of the middle bottom box of the casting mold of the ultra-thick spheroidal graphite cast iron storage and transportation container according to the embodiment of the present invention;
fig. 7 is a schematic view of a chill support in a casting mold of an ultra-thick ductile iron storage and transportation container according to an embodiment of the present invention;
FIG. 8 is a schematic view of a mud core support in a casting mold of an ultra-thick ductile iron storage and transportation container according to an embodiment of the present invention;
FIG. 9 is a plan view of a water cooling device in a casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
fig. 10 is a schematic view of a cold iron cover (with cover plate removed) in a casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to an embodiment of the present invention;
in the figure, a bottom box 1, a pouring channel box 2, a metal type unit 3, a ladle 4, a water cooling device 5, a water cooling pipe 5.1, a nozzle 5.2, a mud core support 6, a chill support 7, an air cooling hole 7.1, a support block 7.2, a sprue pipeline 8, an ingate 9, a nest seat 10, a cross pouring channel 11, an air exhaust pipeline 12, an air supply pipeline 13, a weight 14, a hoop 15, a body riser 16, an outer ring chill 17 and an inner ring chill 18 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in figure 1, the hundred-ton spent fuel container has the outer diameter of 2550mm, the inner diameter of 1565mm, the height of 4860mm, the wall thickness of 500mm and the weight of 120T. As shown in fig. 2 and 3, the casting mold of the hundred-ton-class spent fuel container comprises a sand box, a metal type unit 3 and a rapid cooling system, the sand box comprises a bottom box 1 and a pouring box 2, a bottom box pouring channel is arranged in the bottom box 1, the pouring box 2 is provided with a sprue channel 8, the pouring box 2 is respectively arranged on the left side and the right side of the bottom box 1, the sprue channel 8 and the bottom box pouring channel are communicated, a mud core is arranged in the bottom box 1, the mud core is sleeved with the metal type unit 3, the mud core is wrapped in an inner cavity of the metal type unit 3 by the metal type unit 3, a profiling cavity of the hundred-ton-class spent fuel container is formed between the outer surface of the mud core and the inner cavity of the metal type unit 3, and the metal type unit 3. The pouring gate boxes 2 are respectively provided with 50T packages 4, and the two packages 4 are respectively communicated with the sprue pipes 8 on the corresponding sides. The rapid cooling system comprises an air supply pipeline 13 and an air exhaust pipeline 12, the air supply pipeline 13 and the air exhaust pipeline 12 are respectively embedded in the sand box, one end of the air supply pipeline 13 and one end of the air exhaust pipeline 12 are respectively communicated with the mud core, the other end of the air supply pipeline 13 is connected with the air blower, natural air is blown in, the other end of the air exhaust pipeline 12 is connected with the exhaust fan, and hot air in the imitation cavity is timely exhausted.
The pouring weight of the hundred-ton spent fuel storage and transportation container is about 150T, and a pouring mode of two sets of 50T seat ladles 4 and 30T pouring ladles is adopted, so that the hundred-ton spent fuel storage and transportation container has the advantages that: the iron liquid is fully kept stand, slag inclusion is convenient to float upwards, the use of filter discs is reduced, and the cost is reduced; the stability of the pouring process is kept, and the defects of slag inclusion, cold shut and the like of the casting are prevented; is convenient for quick pouring and mold filling, and reduces the slag inclusion of the casting.
Because the pouring weight of the hundred-ton spent fuel storage and transportation container reaches 150T, the theoretical weight of the weight iron 14 is more than 450T in order to prevent the graphitization expansion from lifting the box. The top metal mold has a small top surface area and cannot accommodate so many weights 14. As shown in figure 3, the weight 14 and the anchor ear 15 are combined and locked to prevent the graphitized expansion from lifting the box in the solidification process. After the box is closed, 4 blocks of 25T weights 14 are placed on the top metal mold, and then the bottom box 1 and the metal mold units 3 are firmly fastened through the hoops 15, so that the problems that the graphitized expansion lifts the box in the pouring process, so that shrinkage porosity, box ejection and the like are caused to a hundred-ton spent fuel storage and transportation container are solved.
As shown in fig. 5 and 6, the bottom box runner comprises a left bottom box runner system and a right bottom box runner system which are symmetrically arranged, the left bottom box runner system is communicated with a sprue pipe 8 in the left runner box, and the right bottom box runner system is communicated with the sprue pipe 8 in the right runner box. The left and right bottom box pouring gate system respectively comprises 9 ingates 9, the 9 ingates 9 are communicated with a cross gate 11 through a nest seat 10, a plurality of ingates 9 enter iron to enable the filling to be stable, and defects of slag inclusion, air entrainment and the like caused by casting production due to turbulence are avoided. The sprue pipe 8, the ingate 9 and the cross gate 11 are respectively wrapped with refractory pipes. Considering the wall thickness of the hundred-ton spent fuel container is about 500mm, the low-temperature fast casting process is selected, the casting temperature is 1300-1350 ℃, the casting time is 100-150 s, the internal casting speed is 0.7-1.0 m/s, the liquid state shrinkage of metal can be reduced, and the shrinkage porosity can be prevented.
As shown in fig. 4, 7 and 8, the mud core comprises a mud core support 6, a circular chiller and a chiller cover, the mud core support 6 is formed by welding and processing 6 steel plates through a circular reinforcing rib, the bottom plane is required to be flat, and the chiller is convenient to assemble in a non-closed structure. The chill support 7 is a cylindrical cylinder welded by a steel plate. The mud core support 6 is vertically fixed on a pit seat of the mud core support of the bottom case 1, a plurality of stacked chilling block supports 7 are sleeved on the mud core support 6, and annular chilling blocks are coated on the outer sides of the corresponding chilling block supports 7, so that the annular chilling blocks are respectively arranged on the stacked chilling block supports 7. 12 supporting blocks 7.2 are arranged on the bottom chiller support 7 in the circumferential direction and used for supporting the circumferential chills. The mounting hole of a plurality of even settings is seted up to chiller support 7 along the axis hoop, wears to establish the bolt in the mounting hole, and the hoop chiller is worn to establish by the bolt other end for the hoop chiller has the relation of being connected with chiller support 7, fills out between chiller support 7 and the mud core support 6 and establishes the chromite sand, and the chromite sand has good heat conductivity, can effectively reduce the temperature of chiller. The chiller cover is supported at the top end of the annular chiller, and the chiller cover is fixedly connected with the mud core bracket 7 through bolts to form the mud core meeting the requirements.
As shown in fig. 10, the chiller cover includes an outer ring chiller 17 and an inner ring chiller 18, a T-shaped groove is formed in the bottom of the outer ring chiller 17, the T-shaped grooves are uniformly formed in the cover plate in the circumferential direction, the T-shaped groove is matched with the T-shaped groove, so that the outer ring chiller 17 is clamped in the circumferential direction on the cover plate, the inner ring chiller 18 is laid on the inner side of the outer ring chiller 17, and the cover plate is covered by the outer ring chiller 17 and the inner ring chiller 18. And after the positions of the outer ring chiller 17 and the inner ring chiller 18 are installed, sand filling is carried out on the clearance between the two chills. Because of the casting pouring back expend with heat and contract with cold, outer lane chill 17 adopts the equipment of T type groove to be on preventing that the back outer lane chill 17 of unpacking from gluing the casting, and during the casting shrink, outer lane chill 17 can inwards slide along T type groove, and can not glue at the casting inner wall, has avoided the condition of clearance difficulty.
As shown in fig. 6 and 7, 4 air cooling holes 7.1 are circumferentially formed in the bottom of the chiller support 7, the rapid cooling system comprises 3 air supply pipelines 13 and 1 air exhaust pipeline 12, and the air supply pipelines 13 and the air exhaust pipeline 12 are respectively communicated with the 4 air cooling holes 7.1. After pouring, the temperature of the chiller rises, which can cause the temperature of air in the mud core bracket 6 to rise, 3 blowers are adopted to respectively blow natural air to the 3 air supply pipelines 13, and the temperature in the cavity is reduced by the blown natural wind energy; 1 exhaust pipeline 12 is exhausted through 1 exhaust fan, hot air at the top of the cavity is timely extracted, and the cooling environment of a hot spot area is improved. The temperature of the inner cavity can be effectively reduced by blowing natural wind and pumping hot wind, the continuous chilling effect of the chilling block is enhanced, and the solidification time of a hundred-ton spent fuel container is shortened, so that a high-performance and zero-shrinkage-porosity product is obtained.
As shown in fig. 2 and 9, the metal mold unit 3 includes 6 metal molds, and the 6 metal molds are stacked and fixedly connected with each other by bolts. The metal type unit is wrapped with the oppositely-combined water-cooling pipe 5.1, the water-cooling pipe 5.1 is provided with a plurality of nozzles 5.2 in the annular direction, the water-cooling pipe 5.1 is sprayed out through the nozzles after being filled with water, the metal type unit 3 is cooled, and the continuous chilling capability of the metal type unit 3 is enhanced. Set up a plurality of valves on water-cooling pipe 5.1, every valve can all adjust the play water state of nozzle: spray or water spray. After pouring, the valve is opened, so that water introduced into the water-cooling pipe 5.1 is sprayed or misted on the metal type unit 3 through the nozzle 5.2, the temperature of the metal type unit 3 is reduced, and the solidification time of the hundred-ton spent fuel storage and transportation container is shortened.
When the wall thickness of the casting is overlarge, the problems of graphite floating, graphite blooming, broken graphite, small graphite ball number, large graphite size and the like easily occur in the structure. When the chill and the metal mold are adopted to cool the casting, the chilling capability of the chill and the metal mold is greatly reduced after being heated, so that the continuous cooling effect cannot be achieved, and even the heat preservation reaction can be realized. The common method for cooling the casting by using the chilling block and the metal mold cannot solve the problem of metallographic structure. The method and the device respectively cool the chilling block and the metal mold, improve the continuous chilling capability of the chilling block and the metal mold, and obtain the hundred-ton spent fuel storage and transportation container with compact structure.
As shown in figure 4, a casting body riser 16 is arranged on the top metal mould unit, and the body riser 6 not only can collect dirt and cold molten iron, but also can play a feeding role, so that the defects of slag inclusion, shrinkage porosity and the like of the ultra-thick ductile iron storage and transportation container are prevented.
The cold iron and the metal mold unit 3 are cooled respectively, so that the continuous chilling capability of the cold iron and the metal mold is improved, the eutectic solidification time is shortened, and the compactness of a casting is improved; the weight 14 is placed on the top metal mold, the anchor ear 15 firmly fastens the bottom box 1 and the metal mold unit 3, the graphitized expansion in the casting process is prevented from lifting the box, the problems of shrinkage porosity, box ejection and the like of the super-thick large nodular cast iron storage and transportation container are avoided, and therefore a high-performance and zero-shrinkage porosity product is obtained, and the ultrasonic detection requirement is met. Two bottom pouring type pouring systems are adopted to pour the profiling cavity at the same time, so that the iron liquid is fully stood, slag inclusion floating is facilitated, the use of filter discs is reduced, and the production cost is reduced; the pouring process is stable, and the defects of slag inclusion, cold shut and the like of the casting are prevented; the magnetic powder detection requirement is met.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (10)
1. A casting mould of an ultra-thick large ductile iron storage and transportation container is characterized in that: the sand box comprises a bottom box and a plurality of pouring boxes, wherein a bottom box pouring gate is arranged in the bottom box, a straight pouring gate pipeline is arranged in each pouring box, and the pouring boxes are respectively arranged on the bottom box to realize the communication between the straight pouring gate pipeline and the bottom box pouring gate; a mud core is arranged in the bottom box, a metal type unit is sleeved on the mud core, a profiling cavity of the super-thick large nodular cast iron storage and transportation container is formed between the mud core and the metal type unit, and the metal type unit is fixed on the bottom box to realize the communication of the profiling cavity and a pouring channel of the bottom box; the metal mold unit is provided with a water cooling device for cooling the metal mold unit; one end of the rapid cooling system is communicated with the mud core, and the other end of the rapid cooling system is connected with the air pumping/supplying device, so that the mud core is cooled; an anti-expansion locking device is arranged between the metal unit and the bottom box.
2. The casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 1, wherein: the mud core comprises a mud core support and a chilling unit, the mud core support is vertically fixed on the bottom box, the chilling block support is sleeved on the mud core support, the chilling unit is coated on the chilling block support, and sand mud is filled between the chilling block support and the mud core support.
3. The casting mold of the ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 2, wherein: the bottom of the chilling block support is annularly provided with a plurality of supporting blocks for supporting the chilling block unit; the chill support is provided with a plurality of mounting holes arranged at intervals along the shaft collar, and bolts penetrate through the mounting holes to realize connection of the chill support and the chill unit.
4. The casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 3, wherein: the chilling block unit comprises an annular chilling block and a chilling block cover, wherein the chilling block cover is arranged at the top end of the annular chilling block and is fixedly connected with the mud core support.
5. The mold of claim 4, wherein the casting mold comprises: the chilling block cover comprises an outer ring chilling block and an inner ring chilling block, the outer ring chilling block is clamped on the cover plate in the circumferential direction, and the inner ring chilling block is laid on the inner side of the outer ring chilling block.
6. The casting mold of the ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 2, wherein: the rapid cooling system comprises an air suction pipeline and an air supply pipeline, the air suction pipeline and the air supply pipeline are respectively arranged in the sand box, a plurality of air cooling holes are formed in the chill support, and the air suction pipeline and the air supply pipeline are respectively communicated with the corresponding air cooling holes.
7. The casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 1, wherein: the water cooling device comprises a water-cooled tube and a nozzle, the water-cooled tube is embraced in the metal type unit, the nozzle is annularly arranged on the water-cooled tube, and a valve used for adjusting the shape of water is arranged on the water-cooled tube.
8. The casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 1, wherein: the anti-expansion locking device comprises a weight and an anchor ear, the weight is pressed at the top end of the metal type unit, and the anchor ear is fixedly connected with the bottom box and the metal type unit.
9. The mold of claim 8, wherein the casting mold comprises: the metal mold unit comprises a plurality of metal molds which are arranged in an overlapped mode and fixedly connected respectively, and a casting body riser is arranged on the metal molds at the top.
10. The casting mold of an ultra-thick spheroidal graphite cast iron storage and transportation container according to claim 1, wherein: the pouring gate box is provided with a seat bag, and the seat bag is communicated with the pouring gate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922189698.7U CN211248283U (en) | 2019-12-09 | 2019-12-09 | Casting mould of super-thick large nodular cast iron storage and transportation container |
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| CN201922189698.7U CN211248283U (en) | 2019-12-09 | 2019-12-09 | Casting mould of super-thick large nodular cast iron storage and transportation container |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365486A (en) * | 2022-08-12 | 2022-11-22 | 中国兵器装备集团西南技术工程研究所 | Control system of multi-field pressure casting equipment |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365486A (en) * | 2022-08-12 | 2022-11-22 | 中国兵器装备集团西南技术工程研究所 | Control system of multi-field pressure casting equipment |
| CN115365486B (en) * | 2022-08-12 | 2023-08-29 | 中国兵器装备集团西南技术工程研究所 | Control system of multi-field pressurizing casting equipment |
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