CN202517011U - Hollow billet water cooling casting device - Google Patents

Abstract

The utility model relates to a hollow billet water cooling casting device comprising a cylindrical water cooling outer metal mould, a cylindrical water cooling inner metal mould arranged in the cylindrical water cooling outer metal mould and an annular casting cavity formed between the water cooling inner metal mould and the water cooling outer metal mould, wherein dead head casting moulds are arranged at the top of the water cooling outer metal mould and the water cooling inner metal mould; a water cooling bottom box is arranged at the lower part of the outer metal mould and the inner metal mould, molten metal enters into the cavity by virtue of the water cooling bottom box from a pouring gate; the pouring gate is a tangent horizontal pouring gate, the molten metal enters into the water cooling bottom box by virtue of the pouring gate along tangent direction, by virtue of promotion of outlet velocity of the tangent horizontal pouring gate, molten steel rises in a circumferential rotation manner from a position below the cavity; vertical sections of the water cooling outer metal mould and the water cooling inner metal mould are metal moulds which are thin at the upper part and are thick at the lower part, relative clotting time of the molten metal at the upper part in the cavity is delayed compared with the relative clotting time of the molten metal at the lower part in the cavity, and the molten metal is sequentially cooled from bottom to top by adjusting the controlled cooling water height, so that the quality of a finished product is improved.

Description

Hollow bloom water cooling casting device

Technical field

The utility model is the casting device about a kind of hollow bloom, and especially a kind of hollow bloom water cooling casting device relates to the blank preparation in metallurgical tubulation, machine-building system loop technique field; Be particularly related to the technical field of ultra-large type hollow bloom water cooling casting.

Background technology

Along with need large thick-wall seamless steel pipe, large thick-wall ring (heavy-duty machinery race ring, wind-powered electricity generation backing ring, the annular gear ring etc.) demand of the national economic development constantly increases, the common manufacturing process of traditional handicraft adopted casting large-scale solid ingot (base) → realize through the punching → reaming → forging rolling processing of product blank in the past.Along with the continuous innovation of technology and supporting technology, a kind of new process has appearred in particularly big specification and super large-scale tubulation, annular product in recent years: hollow ingot casting → hollow forging → finished product processing; The product quality that this method is produced high (after the forging), operation short (having simplified punching, perforation) are promoted rapidly.

Existing slush casting technology: comprise centre spinning, static core casting, air cooling steel bushing core casting and hollow pipe continuous casting process.

Centre spinning; It is fine and closely woven to have the foundry goods outer tissue; Technology is easy, foundry goods recovery rate advantages of higher; But there are slag inclusion, shrinkage cavity, weaker zone in its inner surface 10～40mm scope, therefore must under cold state, adopt the way of machining to handle after the casting, and centrifugation apparatus once invested height.

Static core casting, it is simple to invest little technology, but during the foundry goods cooling; Faster than the cooling velocity of inner surface, promptly the outside of foundry goods gets soon than solidified inside the outer surface cooling velocity greatly, and Fig. 9 has schematically shown the casting solidification process fraction solid that adopts static core casting method to make to change the CAE simulation result; The different phase of representing foundry goods with a, b, c, d, five figure of e respectively; Among the figure, light areas representes not solidify regional A1, and its outside darker regions is represented solidification layer B1.Can be clear that from figure when adopting this method to make the hollow pipe foundry goods, outer surface at first solidifies; The inner surface final set, promptly Fig. 9 a is for solidifying beginning, and Fig. 9 b is an early solidification; Fig. 9 c is for solidifying mid-term; Fig. 9 d is for solidifying the later stage, and Fig. 9 e has represented that through each figure molten metal (regional A1 is solidified at the end) reaches the change procedure of solidification layer B1 for finishing (all solidifying).Shown in Fig. 9 c, do not solidify (existing the end of light color to solidify regional A1) yet at the inner surface of this stage hollow pipe, just all solidify by Fig. 9 d to Fig. 9 e molten metal, promptly the inner surface C of hollow pipe and top area D are the final set district.The characteristics of this method are: it is narrower and dark to solidify later stage liquid core; Therefore it is not smooth to be prone to feeding; Make the foundry goods inner surface organize relative machine big; Can there be one deck weaker zone that easy oxidation is difficult to remove in forging heating process in inner surface near core, also needs the processing once of the advanced row of inner surface for the harsh slightly product of service condition.

Air cooling steel bushing core casting; Be the more method that adopts both at home and abroad at present, comparatively ripe in the large-sized hollow steel ingot of short machine is made, but make for the cast tube base of elongated tubular; It is loose that this method is difficult to avoid tubular foundry goods center to occur; Shown in figure 10 for the casting solidification process fraction solid that adopts air cooling steel bushing core casting method to make changes CAE simulation result sketch map, represent the different phase of foundry goods respectively with a, b, c, d, five figure of e, among the figure; Light areas representes not solidify regional A2, and its outside darker regions is represented solidification layer B2.Be Figure 10 a for solidifying beginning, Figure 10 b is an early solidification, Figure 10 c is for solidifying mid-term, Figure 10 d is for solidifying the later stage, Figure 10 e is for finishing (all solidifying), represented molten metal (regional A2 is solidified at the end) and the change procedure of solidification layer B2 through each figure.From figure, can be clear that; Adopt this air cooling steel bushing core casting method to have the problem of above-mentioned static core casting equally; It is narrower and dark to solidify later stage liquid core; Therefore it is not smooth to be prone to feeding, and secondary pipe may appear in foundry goods when serious, and this method need be made a direct steel plate with the molten steel contact and is fused in the foundry goods when each the manufacturing.

The hollow pipe continuous casting process; Comprise vertical-type hollow pipe continuous metal cast process and horizontal hollow pipe continuous metal cast process; Be characterized in adopting a water mold to do external form, do fuse, realize the preparation of hollow bloom through the continuous drawing casting with a graphite solid bar; Owing to present this method appearance of reasons such as technology is limited to below the less Φ 500mm of outside diameter specification and the small-sized cast tube production below the thinner 100mm of wall thickness, its production efficiency is high, equipment is once invested greatly.

For seeking a kind of big specification (diameter >=1000～2000mm, wall thickness >=300～600mm, manufacturing approach of heavy wall pipe highly >=2000～6000mm) of being fit to; The utility model people combines to be engaged in for many years the experience of casting processing; Develop the hollow bloom water cooling casting device of the utility model; Hang up thick thin thickening degree coating down in the metal mold through adopting upper-thin-lower-thick thickening degree metal mold, adding, and by water-cooled pressure order cooling technology; Through control water-cooled order (from bottom to top advancing gradually), reach and improve the purpose that consecutive solidification is thoroughly eliminated shrinkage cavity, loose thinning microstructure.

The utility model content

The purpose of the utility model provides a kind of hollow bloom casting device; Especially a kind of hollow bloom water cooling casting device; Utilize upper-thin-lower-thick thickening degree metal mold; And, reach and improve the purpose that consecutive solidification is thoroughly eliminated shrinkage cavity, loose thinning microstructure through control water-cooled order (from bottom to top advancing gradually).

A kind of hollow bloom water cooling casting device that the utility model proposes comprises: the outer metal mold of tubular water-cooled, and metal mold in the tubular water-cooled that sets within it forms annular foundry goods die cavity between the inside and outside metal mold of said water-cooled; The top of metal mold is provided with the rising head casting mold in outer metal mold of said water-cooled and the water-cooled; The water-cooled under casing is arranged on metal mold bottom in outer metal mold of said water-cooled and the water-cooled, and molten metal gets into said die cavity from cast gate through the water-cooled under casing; Wherein, said cast gate is the tangent line runner gate, and molten metal tangentially gets into said water-cooled under casing by said cast gate, by the promotion of tangent line runner gate muzzle velocity, makes molten steel be the circumference rotation mode from the below of said die cavity and rises, to obtain pure cast(ing) surface; The vertical section of metal mold is shaped as the metal mold of upper-thin-lower-thick band tapering in the outer metal mold of said water-cooled, the water-cooled, and the relative setting time of molten metal of top obtains postponing than the below in the said die cavity, and molten metal is cooled off in proper order.

Aforesaid hollow bloom water cooling casting device; Wherein, Be provided with many group water-cooled coil pipes in the outer metal mold of said water-cooled; Said water-cooled coil pipe is arranged on outside said water-cooled metal mold bottom upwards in 2/3 the altitude range, and its water inlet pipe, outlet pipe extend to the outside of the outer metal mold of said water-cooled respectively.

Aforesaid hollow bloom water cooling casting device, wherein, said water-cooled coil pipe is arranged near the outer metal mold inner surface 30～80mm place of said water-cooled.

Aforesaid hollow bloom water cooling casting device wherein, in 2/3 altitude range of metal mold, is provided with 2～5 groups of said water-cooled coil pipes outside said water-cooled.

Aforesaid hollow bloom water cooling casting device, wherein, the outer metal mold of said water-cooled is arranged with the fireproof heat-insulating layer at its outer surface in downward 1/3 altitude range in top.

Aforesaid hollow bloom water cooling casting device; Wherein, Metal mold is merogenesis combined metal type in the outer metal mold of said water-cooled, the water-cooled, is made up of 2～3 joints respectively along short transverse, falls to putting connection through the female seam of public affairs location nature between the two adjacent joint metal molds.

Aforesaid hollow bloom water cooling casting device wherein, is equipped with at least one group of said water-cooled coil pipe in the outer metal mold of the said water-cooled of every joint.

Aforesaid hollow bloom water cooling casting device, wherein, a center cooling water pipe passes the bottom that said rising head casting mold stretches into metal mold in the said water-cooled, and said center cooling water pipe is solid on said rising head casting mold by frame.

Aforesaid hollow bloom water cooling casting device, wherein, said center cooling water pipe is arranged on the center line of metal mold in the said water-cooled; And be arranged on the said center cooling water pipe in the interior metal mold of said water-cooled; Be uniformly distributed with the multilayer aerial fog nozzle along short transverse; Establish at every layer circumferencial direction ring and to be uniformly distributed with 4～8 nozzles, can open every layer nozzle from bottom to top successively, thus metal mold order cooling from bottom to top in realizing.

Aforesaid hollow bloom water cooling casting device, wherein, the bottom of said center cooling water pipe is provided with delivery port.

Aforesaid hollow bloom water cooling casting device; Wherein, Said hollow bloom water cooling casting device further comprises liquid level detection device; Said liquid level detection device comprise that liquid level gauge, liquid level gauge are cursory, said liquid level gauge is cursory to be arranged in the said water-cooled in the metal mold, is connected with said liquid level gauge through steel wire rope.

Aforesaid hollow bloom water cooling casting device, wherein, metal mold is the variable-diameter metal mold in the said water-cooled, and metal mold is made up of 2～3 joints in short transverse in this water-cooled, falls to putting connection through the female seam of public affairs location nature between the two adjacent joint metal molds.

Aforesaid hollow bloom water cooling casting device; Wherein, Metal mold has radially divided a plurality of interior metal mold unit in the said water-cooled of every joint; The upper/lower terminal of metal mold unit is connected with lower flange with upper flange respectively in each, forms metal mold in the complete said water-cooled, and each said interior metal mold unit all can radially move relative to said upper and lower flange.

Aforesaid hollow bloom water cooling casting device, wherein, metal mold is made up of upper flange, lower flange and 4～8 interior metal mold unit in the said water-cooled of every joint, has the gap between per two adjacent interior metal mold unit; Said upper flange is provided with lower flange upper edge radial direction and is the radial stay bolt hole that is connected said interior metal mold unit of putting; The metal mold unit was connected with lower flange with said upper flange respectively through the bolt that is arranged in the said stay bolt hole in each was said; The bolt of adpting flange can slide along the stay bolt hole when receiving the extruding of foundry goods contraction; Gap in adjacent between the metal mold unit is reduced by pressure, realizes reducing, to prevent the foundry goods contraction crack, to prevent foundry goods and interior metal mold locking.

Aforesaid hollow bloom water cooling casting device wherein, is filled with filler in the gap between two adjacent said interior metal mold unit, and said filler is the contractibility refractory material, to prevent casting initial stage drill steel in said gap.

Aforesaid hollow bloom water cooling casting device; Wherein, The inwall seam crossing of metal mold is equipped with the baffle plate of a width greater than said gap width in the said water-cooled, and each said baffle plate is connected with two adjacent interior metal mold unit, and can slide with the contraction of this metal mold body.

Aforesaid hollow bloom water cooling casting device, wherein, the metal mold outer surface is equipped with the high-temperature refractory coating in the outer metal mold inner surface of said water-cooled, the water-cooled; Said high-temperature refractory coating is last thick thin down Wedging thickness coatings, makes the said die cavity that has applied said dope layer form generally cylindrical body.

Aforesaid hollow bloom water cooling casting device, wherein, the thickness range of said high-temperature refractory coating is 0.1～20mm, is made up of dope layer and layer of sand.

Aforesaid hollow bloom water cooling casting device, wherein, said high-temperature refractory coating comprises the chrome ore layer of sand that is coated in metal mold outside wall surface in outer metal mold internal face of said water-cooled and the water-cooled, and is coated in the zircon flour coating layer on the said chrome ore layer of sand.

Aforesaid hollow bloom water cooling casting device, wherein, said water-cooled under casing comprises: outer case, be arranged on the interior water-cooled annular cover in the said outer case, said outer case with said in formation is connected with said die cavity between the water-cooled annular cover U-shaped cavity; The lower end of said outer case, interior water-cooled annular cover is fixedly connected with the under casing plate, and the upper surface of said outer case is provided with and the said water-cooled positioning spigot that joins of the lower end of metal mold outward; Said outer case comprises columniform body, and the wooden dipper that the tangential direction of the cylindrical outer case in edge forms constitutes wooden dipper to portion shape water-cooled under casing.

Aforesaid hollow bloom water cooling casting device, wherein, the outer case of said water-cooled under casing is that cast steel or the cast iron of 30～100mm is processed by wall thickness.

Aforesaid hollow bloom water cooling casting device, wherein, said interior water-cooled annular cover is made up of diameter less cylindric upper ring cap and the bigger cylindric ring set down of diameter, forms a convex column; Be provided with cylindric perforation endoporus in the water-cooled annular cover in said; Outer surface is formed a L shaped surface of revolution by anchor ring on the upper ring cap external cylindrical surface of minor diameter and the large diameter ring set down; One annular chill suit is arranged on the said down ring set on the anchor ring; The inner peripheral surface of this annular chill and the said L shaped surface of revolution constitute said U-shaped cavity, have built the refractory brick liner by laying bricks or stones in the vertical plane and the bottom surface of said U-shaped cavity.

Aforesaid hollow bloom water cooling casting device; Wherein, Be embedded with cooling water coil apart from the said L shaped surface of revolution 30～50mm place in the water-cooled annular cover in said; The entery and delivery port of said cooling water coil is drawn by the inner surface of said perforation endoporus, and it is outside to extend to said water-cooled under casing through said under casing plate central bore.

Aforesaid hollow bloom water cooling casting device; Wherein, Said wooden dipper is being provided with refractory brick tube in the portion, said refractory brick tube has cross gate, and an end of said cross gate extends horizontally to said U-shaped cavity; And constituting said tangent line runner gate, the other end of said cross gate forms sprue straight up through 90 ° of turning bricks.

Aforesaid hollow bloom water cooling casting device; Wherein, said wooden dipper is being provided with refractory brick tube in the portion, and said refractory brick tube has cross gate; One end horizontal-extending of said cross gate; Run through said outer ring chill, the annular tile liner is communicated with the U-shaped cavity, and constitutes said tangent line runner gate, the other end of said cross gate forms sprue straight up through 90 ° of turning bricks.

Aforesaid hollow bloom water cooling casting device, wherein, said rising head casting mold comprises: rising head case, the hollow annular core that sets within it; The inwall of said rising head case is provided with the thermal insulation fire-resistant material layer, and the inwall of said hollow annular core is provided with adiabatic fire-resistant cotton layer, and the intracavity inter-connection of the inner chamber of said hollow annular core and the interior metal mold of water-cooled.

Compare with known technology, the hollow bloom water cooling casting device of the utility model has following characteristics and advantage:

1, because the vertical section of the outer metal mold of the tubular water-cooled of the utility model, the interior metal mold of tubular water-cooled is selected the metal mold of upper-thin-lower-thick band tapering for use; The people makes metal mold have the big little amount of stored heat in amount of stored heat, top in below; Make metal mold receive molten metal heating back upper place be warming up to rapidly higher temperature thereupon intensity of cooling reduce rapidly; Thereby play the postponement freezing action, play the purpose of consecutive solidification.

2, make metal mold force cooling and order cooling to become possibility because the outer metal mold of water-cooled independently is provided with many group cooling water coils along short transverse, force the application of cooling to strengthen order cooling capacity from bottom to top relatively.

3, owing to 1/3 scope surfaces externally and internally of height below the metal mold top outside water-cooled is arranged with fireproof heat-insulating insulation cotton heat insulation layer; Greatly reduce metal mold top heat transfer heat loss; Prolong greatly and postponed the top setting time, for consecutive solidification has been created more strong condition.

4, metal adopts the merogenesis combining structure that the mould manufacture difficulty is reduced in the outer metal mold of water-cooled, the water-cooled, makes mold height adjustable, changes the height specification and becomes more flexible.

5, be provided with the center cooling water pipe of cooling water nozzle through metal inner cavity in water-cooled, make the interior metal mold of water-cooled force cooling to become possibility; Water-cooled nozzle is opened the order cooling that makes metal mold in the water-cooled from bottom to top in proper order and is achieved.

6, metal mold is made into the U-shaped structure that underseal closes in the water-cooled, directly to the inner chamber water flowing, realizes that through the control height of water level order cooling means from bottom to top is more simple behind the foundry goods formation base shell.

7, since in the water-cooled metal mold be the variable-diameter structure, thoroughly solved casting solidification and shunk the crack problem that is obstructed and possibly causes, problems such as outlet comes are opened not in the fuse locking.

8, the interior last thick scumbling bed of material down that makes of casting of metals die cavity, molten metal is to the heat-transfer capability of metal mold up and down to have played adjustment, and postponement upper metal liquid setting time is strengthened consecutive solidification effect up and down.

9, the use that has the annular water-cooled under casing of tangent-type cast gate; Make the metal fluid power rotate into die cavity; Make molten metal in the circumferencial direction more even distribution, can reduce the generation of blemish such as cast(ing) surface slag inclusion, pore greatly, help improving surface quality of continuous castings.

10, through in the U-shaped cavity of water-cooled under casing, the refractory brick liner being set; Improved the casting mold erosion resistibility greatly; In the under casing water-cooled annular cover and outer ring chill use, can improve the cooling capacity of under casing solidificating period greatly, avoid water-cooled under casing position possibility loose, shrinkage cavity to occur; Improve the lumber recovery of foundry goods bottom, reduce unnecessary crop end loss.

11, in the rising head casting mold that rising head case, hollow annular core constitute, the use of adiabatic fire-resistant cotton layer greatly reduces the heat loss of rising head, has improved the riser feeding ability, reduces the rising head crop end loss, improves the foundry goods lumber recovery.

The hollow bloom water cooling casting device that the utility model proposes; Can realize the water cooling casting of super large hollow bloom; Can obtain the tubular foundry goods of high-quality super large-scale, big ratio of height to thickness through order cooling, consecutive solidification casting method; Can effectively avoid large-scale, the tubular foundry goods internal shrinkage of ratio of height to thickness, the generation of rarefaction defect, improve lumber recovery.

Description of drawings

Following accompanying drawing appearance is intended to the utility model is done schematic illustration and explanation, does not limit the scope of the utility model.Wherein,

Fig. 1 is the structural representation of an embodiment of hollow bloom water cooling casting device of the utility model;

Fig. 2 is the structural representation of another embodiment of hollow bloom water cooling casting device of the utility model, wherein, has schematically shown liquid level detection device;

But Fig. 3 A is the interior metal mold perspective view of reducing water-cooled of the hollow bloom water cooling casting device of the utility model;

But Fig. 3 B is the locations of structures of upper flange, lower flange and the baffle plate of metal mold in the reducing water-cooled;

Fig. 3 C is the structural representation of metal mold unit in the one group of circular arc that constitutes metal mold in the water-cooled;

Fig. 4 A is that the master of metal mold looks sketch map in the water-cooled of hollow bloom water cooling casting device of the utility model;

Fig. 4 B looks sketch map for the left side of Fig. 4 A;

Fig. 4 C looks sketch map for the right side of Fig. 4 A;

Fig. 5 is the water-cooled under casing cross-sectional schematic of the hollow bloom water cooling casting device of the utility model;

Fig. 6 looks sketch map for the water-cooled under casing mansion of the hollow bloom water cooling casting device of the utility model;

Fig. 7 cools off sketch map () in proper order for the foundry goods of the hollow bloom water cooling casting device production of employing the utility model, wherein: a, cooling initial stage; B, the cooling mid-term; C, cooling later stage;

Fig. 8 has represented the position of liquid level detection device in cooling procedure, wherein: a, cooling initial stage for the foundry goods of the hollow bloom water cooling casting device production of employing the utility model cools off sketch map (two) in proper order; B, the cooling mid-term; C, cooling later stage;

Fig. 9 shows figure for the casting solidification process fraction solid that adopts known static core casting method changes the CAE simulation result;

Figure 10 shows figure for the casting solidification process fraction solid that adopts known air cooling steel bushing core casting method changes the CAE simulation result;

The process of setting fraction solid that Figure 11 produces foundry goods for the water cooling casting device that adopts the utility model changes CAE simulation result demonstration figure;

Figure 12 adopts the foundry goods CAE emulation failure prediction result of different casting methods to show comparison diagram; Wherein, A1, a2 are the casting defect predictions of adopting known static core casting method; B1, b2 are the casting defect predictions of adopting known air cooling steel bushing core casting method, and c is the casting defect prediction of adopting the water cooling casting device production of the utility model.

Drawing reference numeral:

1, rising head casting mold 101, rising head case 2, hollow annular core 3, the outer metal mold of water-cooled

31, metal mold 401, upper flange 402, baffle plate in water-cooled coil pipe 4, the water-cooled

403, lower flange 404, stay bolt hole 405, bolt 406, interior metal mold unit

407, screwed hole 408, end 409, shrinkage joint 410, fire resistant infilling

411, inner chamber body 412, dividing plate 5, water-cooled under casing 500, cast gate

501, outer case 502, interior water-cooled annular cover 5021, upper ring cap 5022, following ring set

5023, connect endoporus 5024, cooling water coil 503, outer ring chill 504, under casing plate

505, annular tile liner 506, cross gate 507, sprue 508, wooden dipper are portion

509, lining sand 510, U-shaped cavity 6, running channel 7, cast tubes

8, center cooling water pipe 80, nozzle 81, delivery port 9, foundry goods

10, fireproof heat-insulating layer 11, cup 12, heat preserving agent 13, liquid level gauge are cursory

14, liquid level gauge 15, steel wire rope 16, pulley S, gap

The specific embodiment

For having more clearly, technical characterictic, purpose and effect to the utility model understand; Below in conjunction with accompanying drawing and preferred embodiment; To the specific embodiment, structure, characteristic and the effect of the hollow bloom water cooling casting device of the utility model, specify as after.In addition; Explanation through the specific embodiment; When can being to reach technological means and the effect that predetermined purpose takes to be able to go deep into more concrete understanding to the utility model, yet institute's accompanying drawing appearance provides reference and explanation usefulness, is not to be used for the utility model is limited.

As shown in Figure 1, a kind of hollow bloom water cooling casting device of the utility model comprises: the outer metal mold 3 of tubular water-cooled, and metal mold 4 in the tubular water-cooled that sets within it, forms the foundry goods die cavity of annular at the inside and outside metal mold of said water-cooled 4 between 3; The top of outer metal mold 3 of said water-cooled and the interior metal mold 4 of water-cooled is provided with rising head casting mold 1; Water-cooled under casing 5 is arranged on outer metal mold 3 of said water-cooled and interior metal mold 4 bottoms of water-cooled, and molten metal gets into said die cavity from cast gate 500 through water-cooled under casing 5.Wherein, Said cast gate 500 is the tangent line runner gate, and molten metal tangentially gets into said water-cooled under casing 5 by said cast gate 500, by the promotion of tangent line runner gate muzzle velocity; Make molten steel be the circumference rotation mode from the below of said die cavity and rise, to obtain pure cast(ing) surface.The vertical section of metal mold 4 is shaped as the metal mold of upper-thin-lower-thick band tapering in the outer metal mold 3 of said water-cooled, the water-cooled, and the relative setting time of molten metal of top can obtain postponing than the below in the said die cavity, and molten metal is cooled off in proper order.Said foundry goods for example is a hollow bloom.

Further; Be provided with many group water-cooled coil pipes 31 in the outer metal mold 3 of said water-cooled; Said water-cooled coil pipe 31 is arranged on outside said water-cooled metal mold 3 bottoms upwards in 2/3 the altitude range, and its water inlet pipe, outlet pipe extend to the outside of the outer metal mold 3 of said water-cooled respectively.

For ease of Design and Machining, height that can every group of said water-cooled coil pipe 31 is set to equate that certainly, the height of every group of water-cooled coil pipe 31 can be unequal, and the height of every group of water-cooled coil pipe 31 can be set according to actual needs.

Preferred scheme is that said water-cooled coil pipe 31 is arranged near the outer metal mold 3 inner surfaces 30～80mm place of said water-cooled.

The thickness of metal is last thin, thick down in outer metal mold of the water-cooled of the utility model and the water-cooled; Has the big little amount of stored heat in amount of stored heat, top in below; Make metal mold receive molten metal heating back upper place be warming up to rapidly higher temperature thereupon intensity of cooling reduce rapidly, thereby play the postponement freezing action, play the purpose of consecutive solidification; And the thicker metal mold in bottom can be kept bigger amount of stored heat and intensity of cooling on the one hand, buries cooling water pipe underground to the bottom simultaneously and has created condition.

In addition, outside said water-cooled, in 2/3 altitude range of metal mold 3, be provided with 2～5 groups of said water-cooled coil pipes 31.

A feasible technical scheme is; The outer metal mold 3 of said water-cooled is in downward 1/3 altitude range in top; Be arranged with fireproof heat-insulating layer 10 at its outer surface, this heat insulation layer adopts the cotton material of adiabatic heat-insulation to process, thereby greatly reduces the outer metal mold 3 top heat transfer heat loss of water-cooled; Prolong greatly and postponed the top setting time, more help the molten metal consecutive solidification from bottom to top in the die cavity.

Another feasible technical scheme is that metal mold 4 is merogenesis combined metal type in the outer metal mold 3 of said water-cooled, the water-cooled, is made up of 2～3 joints respectively, between every joint metal mold, is provided with public female seam location nature and falls to putting connection.Adopt the metal of merogenesis combining structure, reduced the manufacture difficulty of mould, can be according to the length requirement adjustment mold height of foundry goods 9, making more, the height specification of mold exchange becomes more flexible.

When adopting more piece combined metal type, be equipped with at least one group of said water-cooled coil pipe 31 in the outer metal mold 3 of the said water-cooled of every joint.In a specific embodiment shown in Figure 1, all be provided with one group of water-cooled coil pipe 31 in the cold outer metal mold 3 of every water saving.

Further, in water-cooled, also be provided with cooling device in the metal mold, specifically be, a center cooling water pipe 8 passes the bottom that said rising head casting mold 1 stretches into metal mold 4 in the said water-cooled, and said center cooling water pipe 8 is solid on said rising head casting mold 1 by frame.

In an optimized technical scheme, said center cooling water pipe 8 is arranged on the center line of metal mold 4 in the said water-cooled; And be arranged on the said center cooling water pipe 8 in the interior metal mold 4 of said water-cooled; Be uniformly distributed with multilayer aerial fog nozzle 80 along short transverse; Establish at every layer circumferencial direction ring and to be uniformly distributed with 4～8 nozzles 80; Can open every layer nozzle 80 from bottom to top successively, thus metal mold order cooling from bottom to top in realizing.After accomplishing casting, open intake-outlet of each group water-cooled coil pipe 31, the nozzle 80 of each layer from bottom to top successively, the outside is carried out in the casting in the die cavity from bottom to top and inside is cooled off simultaneously.The cooling water of nozzle 80 ejection receives the heating of metal mold 4 in the water-cooled and evaporates, thereby plays to 4 coolings of metal mold in this bottom water-cooled and to the effect of below foundry goods cooling.Upwards pass along with what molten metal solidified from bottom to top, correspondingly successively open nozzle 80 and the water-cooled coil pipe 31 corresponding with it, up to metal freezing to the rising head lower edge, closing center's cooling water pipe, the water of remaining inner chamber continues to be evaporated to complete evaporate to dryness.As shown in Figure 2, in another specific embodiment, the delivery port of center cooling water pipe 8 water pipe below; After accomplishing casting, open the water inlet of each group water-cooled coil pipe 31 from bottom to top successively, open the delivery port 81 of center cooling water pipe 8 simultaneously; Cooling water is injected into the bottom certain altitude of metal mold 4 inner chamber body 411 in the water-cooled; The cooling water that receives metal mold 4 heating in the water-cooled is heated up, is evaporated, thereby plays to 4 coolings of metal mold in this bottom water-cooled and to the effect of below foundry goods cooling, along with molten metal solidify from bottom to top upwards pass; Through the inner cooling water surface of liquid level detection device control constantly rise and with the same height of the said water-cooled coil pipe 31 that injects cooling water; Up to metal freezing to the rising head lower edge, closing center's cooling water pipe, the water of remaining inner chamber continues to be evaporated to complete evaporate to dryness.Said inner chamber body 411 is made up of the internal face of metal mold in the water-cooled 4 and the dividing plate 412 on perforation endoporus 5023 tops that are arranged on its bottom and water-cooled under casing 5.

Wherein, said liquid level detection device comprises that liquid level gauge 14, liquid level gauge are cursory 13, and said liquid level gauge cursory 13 is arranged in the said water-cooled in the metal mold 4, is connected with said liquid level gauge 14 through steel wire rope 15.

As shown in Figure 2, in a specific embodiment, the top of said center cooling water pipe 8 is provided with first pulley 17, is provided with second pulley 16 in the outside of said metal mold, and steel wire rope 15 windings are at said first, second pulley 17,16.Said liquid level gauge cursory 13 is sheathed on said center cooling water pipe 8, through steel wire rope 15 said liquid level gauge cursory 13 is connected with liquid level gauge 14.Said liquid level gauge cursory 13 goes up and down along with the up-down of the chilled water in the metal mold in the water-cooled 4, and drives liquid level gauge 14 1 liftings, to indicate the height of the chilled water in the metal mold 4 in the water-cooled at any time.

Please cooperate referring to Fig. 1, Fig. 3 A, Fig. 3 B, Fig. 3 C, Fig. 4 A, Fig. 4 B, Fig. 4 C; In a feasible technical scheme; Metal mold 4 constitutes the variable-diameter metal mold in the said water-cooled; And metal mold 4 is made up of 2～3 joints in short transverse in the water-cooled of this variable-diameter, between every joint metal mold, is provided with public female seam location nature and falls to putting connection.

In a specific embodiment; Metal mold 4 has radially divided a plurality of interior metal mold unit 406 in the said water-cooled of every joint; The upper/lower terminal of metal mold unit 406 is connected with lower flange 403 with upper flange 401 respectively in each; Form metal mold 4 in the complete said water-cooled, and each said interior metal mold unit 406 can radially move all relative to said upper and lower flange 401,403.Wherein, adjacent upper and lower flange forms public female seam location respectively, through falling to putting naturally the cold interior metal mold of each water saving is connected.Metal mold 4 can be with the carrying out of molten metal solidification shrinkage in the tubular water-cooled of the utility model; Diameter changes, and during foundry goods 9 solidification shrinkage, but the interior metal mold 4 of diameter change can not crack foundry goods; And the 9 solidification shrinkage later stages of foundry goods can not make metal mold 4 lockings in the water-cooled, and foundry goods 9 is easy to outlet.

Concrete is, metal mold 4 is made up of upper flange 401, lower flange 403 and 4～8 s' 1/4～1/8 interior metal mold unit 406 in the said water-cooled of every joint, like Fig. 3, shown in Figure 4; In this specific embodiment, metal mold 4 is made up of metal mold unit 406 in 4 1/4 circular arc by 4 five equilibriums in the water-cooled; Certainly; Also can be with metal mold 6 five equilibriums or 8 five equilibriums in the said water-cooled, the quantity of its five equilibrium does not limit, and can confirm according to the diameter dimension of metal mold.Have gap S between per two adjacent interior metal mold unit 406, top, bottom and the upper and lower flange 401 of metal mold unit 406 in each, have shrinkage joint 409 between 403.Metal mold unit 406 is connected with lower flange 403 with said upper flange 401 respectively through bolt 405 in each; Said upper flange 401 is provided with lower flange 403 upper edge radial directions and is the radial stay bolt hole 404 that is connected said interior metal mold unit 406 of putting; The metal mold unit was connected with lower flange with said upper flange respectively through the bolt that is arranged in the said stay bolt hole in each was said; The bolt 405 of adpting flange can radially slide in stay bolt hole 404 laterally when receiving the extruding of foundry goods 9 contractions; Gap S in adjacent between the metal mold unit 406 is reduced by pressure, and the internal diameter of metal mold 4 diminishes in the water-cooled, has promptly realized the reducing of metal mold in the water-cooled; Can prevent effectively that foundry goods from producing contraction crack, and can prevent foundry goods 9 and interior metal mold locking.For example, in a specific embodiment, when strand internal orifice dimension diameter was Φ 800mm, this gap S can be set to 8～10mm, and circumference is established 6 gap S altogether.The size of this gap S and said in the quantity that is provided with of metal mold unit 406 do not do concrete qualification, the casting dimension of casting and deciding as required.The size of the size of said shrinkage joint 409 and set gap S is complementary.

Further, be filled with filler 410 in the gap S between two adjacent said interior metal mold unit 406, said filler 410 is the contractibility refractory material, thereby can prevent casting initial stage drill steel in said gap S.

Wherein, said contractibility refractory material can be made up of refractory fiber cotton+fire clay+graphite.

In addition; The inwall seam crossing that constitutes two adjacent interior metal mold unit 406 of metal mold 4 in the said water-cooled is equipped with the baffle plate 402 of a width greater than said gap S width; Each said baffle plate 402 is connected with two adjacent interior metal mold unit 406, and can slide with the contraction of metal mold unit 406 in this.For example; On said baffle plate 402, horizontal long slot bore can be set; Bolt passes this long slot bore said baffle plate 402 is connected with the metal mold body, and the internal diameter of metal mold 4 becomes big in the said water-cooled of extruding that receives foundry goods 9 contractions, when promptly the metal mold body radially slides laterally; The bolt that then connects baffle plate and metal mold body can slide said baffle plate 402 with the metal mold body then laterally sliding in the long slot bore.A concrete technical scheme is, the outer surface of metal mold 4 is equipped with the high-temperature refractory coating in the inner surface of metal mold 3, the water-cooled outside said water-cooled, and this coating is made up of dope layer and layer of sand; Said high-temperature refractory coating is last thick thin down Wedging thickness coatings, makes the said die cavity that has applied said high-temperature refractory coating form generally cylindrical body.

Further; The thickness range of said high-temperature refractory coating is 0.1～20mm; In a specific embodiment; Said high-temperature refractory coating comprises the chrome ore layer of sand that is coated in metal mold outside wall surface in outer metal mold internal face of said water-cooled and the water-cooled, and is coated in the zircon flour coating layer on the said chrome ore layer of sand.

Like Fig. 5, shown in Figure 6; The water-cooled under casing 5 of the hollow bloom water cooling casting device of the utility model comprises: outer case 501; Be arranged on the interior water-cooled annular cover 502 in the said outer case 501; Said outer case 501 and said in form U-shaped cavity 510 between the water-cooled annular cover 502, said U-shaped cavity 510 foundry goods die cavity bottom of the annular of formation between the metal mold 4 in metal mold 3 and the water-cooled said water-cooled outside, and be attached thereto logical.The lower end of said outer case 501, interior water-cooled annular cover 502 is fixedly connected with under casing plate 504, and the upper surface of said outer case 501 is provided with and the said water-cooled positioning spigot that joins of the lower end of metal mold 3 outward.Said outer case 501 comprises columniform body, and the wooden dipper that the tangential direction of the cylindrical outer case in edge forms constitutes wooden dipper to portion 508 shape water-cooled under casing.

Wherein, the outer case 501 of said water-cooled under casing 5 is that cast steel or the cast iron of 30～100mm is processed by wall thickness.

In a specific embodiment, said interior water-cooled annular cover 502 is made up of with the bigger cylindric ring set 5022 down of diameter the less cylindric upper ring cap 5021 of diameter, forms a convex column.Be provided with cylindric perforation endoporus 5023 in the water-cooled annular cover 502 in said; Outer surface is formed a L shaped surface of revolution by anchor ring on upper ring cap 5021 external cylindrical surfaces of minor diameter and the large diameter ring set 5022 down; One outer ring chill, 503 suits are arranged on the said down ring set 5022 on the anchor ring; The inner peripheral surface of this outer ring chill 503 and the said L shaped surface of revolution constitute said U-shaped cavity 510, have built annular tile liner 505 by laying bricks or stones in the vertical plane and the bottom surface of said U-shaped cavity 510.

Further; Be embedded with cooling water coil 5024 apart from the said L shaped surface of revolution 30～50mm place in the water-cooled annular cover 502 in said; The entery and delivery port of said cooling water coil 5024 is drawn by the inner surface of said perforation endoporus 5023, extends to water-cooled under casing 5 outsides through said under casing plate 504 central bore.

A concrete scheme is; Said wooden dipper is being provided with refractory brick tube in the portion 508; Said refractory brick tube has cross gate 506; One end of said cross gate 506 extends horizontally to said U-shaped cavity 510, and constitutes said tangent line runner gate 500, and the other end of said cross gate 506 forms sprue 507 straight up through 90 ° of turning bricks.

And between the outer peripheral face of said outer case 501 and outer ring chill 503, following ring set 5022, and wooden dipper is being filled with insulation lining sand 509 in the portion 508.

As shown in Figure 5; End horizontal-extending at cross gate 506 described in the specific embodiment; Run through said outer ring chill 503, annular tile liner 505 is communicated with U-shaped cavity 510; Inwall at said outer ring chill 503 forms tangent line runner gate 500, and said tangent line runner gate 500 runs through said annular tile liner 505.

The said rising head casting mold 1 of the utility model comprises: rising head case 101, the hollow annular core 2 that sets within it; The inwall of said rising head case 101 is provided with the thermal insulation fire-resistant material layer, and the inwall of said hollow annular core 2 is provided with adiabatic fire-resistant cotton layer, and the inner chamber of said hollow annular core 2 is connected with the inner chamber body 411 of metal mold 4 in the water-cooled.

Utilize the above-mentioned hollow bloom water cooling casting device of the utility model, carry out operation by mould assembling, casting, control, unpacking step.Specifically comprise:

The preparation of mould: comprise the moulding that sand, rising head outer container, rising head core are hung in the cleaning of the inside and outside metal mold of moulding, water-cooled of annular water-cooled under casing; Drying etc.Following appearance is done an explanation with the extension sand molding of metal mold in the water-cooled:

At first, the lower flange 403 with metal mold in the water-cooled 4 keeps flat on the Working gantry position of respectively corresponding lower flange 403 being put in the interior metal mold unit 406 of each 1/4 five equilibrium then; The screwed hole of T shape stay bolt hole on the lower flange 403 404 with interior metal mold unit 406 aligned; Put on fastening bolt 405 and pad, adjust metal mold diameter (guaranteeing concentric) in the required initial water-cooled, install flange 401 back bolts and carry out pretension upper and lower flange 401,403 with lower flange 403; Dynamics is moderate, and (power is crossed the contraction that senior general influences foundry goods 9; Too small planform can't guarantee), then, the baffle plate 402 of dilatation joint is installed; In dilatation joint (gap S), fill in contractibility fire resistant infilling 410; The outer surface of 4 cylindrical shells of metal mold in the water-cooled hung on request coats thick down thin thickening degree high-temperature refractory coating, comprise the dilatation joint position, carry out drying after finishing, revise to be poured before mould assembling.

The assembling of mould:

At first, ready annular water-cooled under casing 5 is put the casting place, ground is paved really, draws the water cooling tube water inlet pipe and water outlet pipe; On water-cooled under casing 5, fall to discharging water then cold in metal mold 4 following joint, on the joint, the rising head core; Seam crossing with the equating of alcohol-base paint original text, is lighted air dry; The joint up and down of the outer metal mold 3 of water-cooled is incorporated into together, seam with the equating of alcohol-base paint original text, is lighted integral hoisting (must not save up and down the changing of the relative positions takes place again) behind the air dry, the interior metal mold 4 of centering water-cooled slowly is assembled on the water-cooled under casing 5 outer container rims of the mouth; Rising head casting mold 1 closes; Straight cast tubes 7 and cup 11 are installed; Remove sand grains impurity in the die cavity with dust catcher purging and suction; Center cooling water pipe 8 in the metal mold 4 in the water-cooled is installed; The entery and delivery port of center cooling water pipe 8, water-cooled coil pipe 31 is connected with cooling water system.

Foundry goods casting, control cooling and unpacking:

At first, whether the inspection pipeline connects, and opens the water return pipeline that is connected with water-cooled coil pipe 31, center cooling water pipe 8, cooling water coil 5024, and keeps the unimpeded of water return pipeline;

With molten metal by the cast tubes that is connected with sprue 507 7 get into said sprue 507, cross gate 506, the tangent line runner gate 500 that is provided with along the tangent line of water-cooled under casing 5 injects in the U-shaped cavitys 510; Promotion by the tangent line muzzle velocity; Make molten steel be the circumference rotation mode and in die cavity, rise, be full of the die cavity of the metal mold formation of upper-thin-lower-thick;

Open the water inlet valve of control water-cooled under casing 5 cooling water coils 5024, the molten metal in the said water-cooled under casing 5 is implemented to force cooling; Then, open the water inlet valve of the water-cooled coil pipe 31 in the outer metal mold 3 of control water-cooled from bottom to top successively, open the valve that control is arranged on the center cooling water pipe 8 in the metal mold 4 in the water-cooled simultaneously, the foundry goods in the said die cavity is carried out outer, interior cooling simultaneously;

Said molten metal is begun to cool down by water-cooled under casing 5 and solidifies, and solidify until rising head fully on bottom, middle part, the top of the die cavity that constitutes via the inside and outside metal mold of water-cooled 4,3 successively; Close said cooling water inlet valve, thus continue to keep water return pipeline unimpeded, along with foundry goods 9 continues the moisture continuation evaporation that cooling remains in pipeline, until distilled-to-dryness;

Dismounting center cooling water pipe;

Unpack, foundry goods is cleared up.

In a specific embodiment, on water-cooled under casing 5, be provided with cast tubes 7, the top of this cast tubes 7 is provided with cup 11, and the running channel 6 of said cup 11, cast tubes 7 is connected with the sprue 507 of water-cooled under casing 5.According to technological requirement, with qualified molten metal by the U-shaped cavity 510 that injects water-cooled under casing 5 through running channel, sprue 507, the cross gate 506 of cup 11 and cast tubes 7 along tangent line; Molten steel is rotating bottom, middle part, the top of the die cavity that is made up of the inside and outside metal mold 4,3 of water-cooled under casing 5 entering water-cooleds, gets into rising head casting mold 1, until stop casting apart from rising head case 101 upper edge 100mm.

Further, be coated with the heat preserving agent 12 that plays adiabatic covering effect on the metal bath surface in the rising head of said rising head casting mold 1.In order further to improve heat insulation effect, an optimized technical scheme is to be coated with exothermic mixture on the metal bath surface in rising head, further covering and heat insulating agent 12 on said exothermic mixture.

As shown in Figure 1; In a feasible scheme, when cooling off, open the water inlet, the delivery port that are arranged on first group of water-cooled coil pipe 31 of bottom in the outer metal mold 3 of water-cooled from bottom to top; Simultaneously; Successively open the but nozzle 80 on the water pipe 8 of said cold center, keep the inside and outside cooled region of foundry goods corresponding, and make said cooled region by rising synchronously.

As shown in Figure 2; In another feasible scheme; When cooling off, open successively from bottom to top and be arranged on water inlet, the delivery port of respectively organizing the water-cooled coil pipe in the outer metal mold of water-cooled, simultaneously; Open the delivery port 81 of cooling water pipe 8 bottoms, said center, and keep the height of water level in the metal mold 4 and said first group of water-cooled coil pipe 31 same height in the said water-cooled according to the testing result of liquid level gauge 14; Open successively from bottom to top more subsequently and respectively organize said water-cooled coil pipe 31, keep the water levels in the interior metal mold 4 of corresponding water-cooled to improve synchronously simultaneously.

Like Fig. 7, shown in Figure 8, schematically shown the variation of foundry goods in each cooling initial stage of cooling off in proper order when adopting two kinds of center cooling water pipe structures among the figure respectively.Specifically be, behind the completion casting operation, at first open the valve of the cooling water coil 5024 of water-cooled under casing 5, the molten metals in the water-cooled under casing 5 are implemented to force cooling; Then; Open the valve of the first group of water-cooled coil pipe 31 in outer metal mold 3 bottoms of water-cooled; In an embodiment shown in Figure 7; Successively open simultaneously the nozzle 80 of the center cooling water pipe 8 in the metal mold 4 in the water-cooled, and the cooling water height that sprays in the metal mold 4 in the maintenance water-cooled is identical with said first group of water-cooled coil pipe 31.Along with solidifying of molten metal, progressively open second group, the 3rd ... Water-cooled coil pipe 31, and each layer nozzle 80 corresponding on the center cooling water pipe 8 with it, corresponding with the cooled region that the maintenance foundry goods is inside and outside, and make said cooled region by rising synchronously.

In another embodiment shown in Figure 8; Be not to be provided with on the center cooling water pipe 8 nozzle 80 with Fig. 7 difference appearance; But the bottom is provided with delivery port 81, outside opening water-cooled, in the valve of the first group of water-cooled coil pipe 31 in metal mold 3 bottoms, opens the delivery port 81 of center cooling water pipe 8; And control the inner cooling water surface by means of liquid level detection device and constantly rise, keep height of water level and pairing first group of water pipe in the interior metal mold 4 of water-cooled high together; When in second group, the 3rd group water-cooled coil pipe 31, injecting cooling water subsequently, should keep the interior water level of corresponding interior metal mold to improve synchronously, corresponding with the cooled region that the maintenance foundry goods is inside and outside, and make said cooled region by rising synchronously.

The utility model forces to drive foundry goods 9 by the rapid cooled and solidified of under casing, through bottom, middle part, the top of die cavity, solidifies fully until rising head successively.After treating that foundry goods 9 solidifies fully, close said cooling water inlet valve, it is unimpeded to continue the said water return pipeline of maintenance, along with foundry goods 9 continues cooling, remains in the inner moisture continuation evaporation of metal mold in pipeline, the water-cooled, until distilled-to-dryness.At last, remove the center cooling water pipe.

Then, get into the operation of unpacking: at first open the rising head case 101 of rising head casting mold 1, hollow annular core 2, open the cold outer metal mold 3 of anhydrating then, remove cast tubes 7, running channel 6 is cut off; Metal mold in the water-cooled 4, foundry goods 9, water-cooled under casing 5 are transferred to the knockout place of unpacking in the lump, slough under casing plate 504, prescind cross gate 506, remove outer ring chill 503, interior water-cooled annular cover 502; Remove metal mold 4 in the water-cooled one by one; To foundry goods 9 clear up, visual examination, be transported to next procedure, accomplish whole casting process.

The utility model is the employing uphill casting, gets into the annular housing below from cast gate 500 along tangent line; Promotion by the tangent line muzzle velocity; Making molten metal be the circumference rotation mode rises; The bubble, the impurity that make the metal bath surface forward position form can not stop on foundry goods 9 surfaces, please cooperate referring to Figure 11, therefore can obtain purer surface quality of continuous castings.Entering has the outer metal mold 3 of water-cooled of upper-thin-lower-thick vertical section structure, the interior molten metal of annular die cavity of interior metal mold 4 formations of water-cooled; As scheme shown in a, b, c, the d; The different phase of having represented the foundry goods cooling; Among the figure, light areas representes not solidify regional A3, and its outside darker regions is represented solidification layer B3.Be Figure 11 a for solidifying beginning, Figure 11 b is an early solidification, Figure 11 c is for solidifying mid-term, Figure 11 d is for solidifying the later stage, Figure 11 e is for finishing (all solidifying), represented molten metal (regional A3 is solidified at the end) and the change procedure of solidification layer B3 through each figure.The characteristics of this method are: solidify and narrowly under the later stage liquid core widely and shallow, so feeding is unobstructed.When adopting the device manufacturing foundry goods of the utility model; The cooling that at first receives mo(U)ld face begins to solidify the formation solidified shell; The pressure cooling that the molten metal that is positioned at water-cooled under casing 5 receives on 3 directions that water-cooled annular cover 502, outer ring chill 503 constitute is preferentially solidified, and promotes solidification front and pass from bottom to top.The molten metal that is positioned at the inside and outside metal mold of water-cooled 4,3 belows is cooled off by below thick-walled metal type, and the effect of follow-up Forced water cooling, and the continuation promotion solidification front that solidifies of accepting water-cooled under casing 5 inner metal liquids develops from bottom to top; The metal mold of top is because the thin promptly lower casting mold heat storage capacity of wall thickness; Very fast temperature has rising after receiving the molten metal heating; Cause the stagnation of solidifying at this place, adding thick down thin dope layer, to make that molten metal leans on to the hot transport resistance of casting mold more last big more, causes the relative setting time of molten metal of metal mold top to obtain postponing than the below; Promptly constituted pressure and cooled off the consecutive solidification that cooling causes with order in proper order, until rising head.Be positioned at that the molten metal outer surface that emits contacts with the insulation insulating refractory of rising head casting mold 1, inner surface contacts with the core core that the insulation insulating refractory is processed, upper surface contacts with heat preserving agent 12; Has splendid insulation environment; Therefore the superheat state of keeping molten metal that can the long period is shifted rising head onto until consecutive solidification and is solidified end; Therefore avoided that this is large-scale, the tubular foundry goods internal shrinkage of ratio of height to thickness, the generation of rarefaction defect; Shown in the figure e among Figure 11; Adopt the foundry goods of the device production of the utility model; Its casting flaw concentrates on the middle part of rising head and casting section thickness, and Level is lighter, can relatively easily overcome this casting flaw through follow-up forging operation.The utility model is specially adapted to the manufacturing of the large thick-wall pipe of pipe thickness 100～600mm, diameter 800～2000mm, height 2000～6000mm.

Figure 12 adopts the foundry goods CAE emulation failure prediction result of different casting methods to show comparison diagram; Wherein, Figure 12 a1, a2 are the casting defect prediction of adopting known static core casting method, and be as shown in the figure; Color representes that than the depths defective F is very serious, and concentrates on inner surface; Figure 12 b1, b2 are the casting defect prediction of adopting known air cooling steel bushing core casting method, and be as shown in the figure, and color representes that than the depths defective F ' is serious, and is positioned at the top layer with the lining; Figure 12 c is the casting defect prediction of adopting the water cooling casting device of the utility model to produce, and as shown in the figure, the dotted line at foundry goods middle part is represented defective F "; its lighter color representes that defective is light; and this defective is positioned at the middle part of casting section thickness, and the forging processing through follow-up is easy to overcome this defective.Therefore, the foundry goods of the device production of employing the utility model is compared with known technology and is greatly reduced casting flaw, has improved lumber recovery.

The above appearance is the schematic specific embodiment of the utility model, is not in order to limit the scope of the utility model.Any those skilled in the art, equivalent variations and the modification under the prerequisite of design that does not break away from the utility model and principle, done all should belong to the scope that the utility model is protected.And need to prove; Each part of the utility model not appearance is limited to above-mentioned overall applicability; Each technical characterictic of describing in the specification of the utility model can select one to adopt or select the multinomial use that combines separately according to actual needs; Therefore, the utility model has been contained other combination relevant with this case inventive point and concrete the application in the nature of things.

Claims (26)

1. a hollow bloom water cooling casting device is characterized in that said casting device comprises: the outer metal mold of tubular water-cooled, metal mold in the tubular water-cooled that sets within it, the foundry goods die cavity of formation annular between the inside and outside metal mold of said water-cooled; The top of metal mold is provided with the rising head casting mold in outer metal mold of said water-cooled and the water-cooled; The water-cooled under casing is arranged on metal mold bottom in outer metal mold of said water-cooled and the water-cooled, and molten metal gets into said die cavity from cast gate through the water-cooled under casing; Wherein, said cast gate is the tangent line runner gate, and molten metal tangentially gets into said water-cooled under casing by said cast gate, by the promotion of tangent line runner gate muzzle velocity, makes molten steel be the circumference rotation mode from the below of said die cavity and rises, to obtain pure cast(ing) surface; The vertical section of metal mold is shaped as the metal mold of upper-thin-lower-thick band tapering in the outer metal mold of said water-cooled, the water-cooled, and the relative setting time of molten metal of top obtains postponing than the below in the said die cavity, and molten metal is cooled off in proper order.

2. hollow bloom water cooling casting device as claimed in claim 1; It is characterized in that; Be provided with many group water-cooled coil pipes in the outer metal mold of said water-cooled; Said water-cooled coil pipe is arranged on outside said water-cooled metal mold bottom upwards in 2/3 the altitude range, and its water inlet pipe, outlet pipe extend to the outside of the outer metal mold of said water-cooled respectively.

3. hollow bloom water cooling casting device as claimed in claim 2 is characterized in that, said water-cooled coil pipe is arranged near the outer metal mold inner surface 30～80mm place of said water-cooled.

4. hollow bloom water cooling casting device as claimed in claim 2 is characterized in that, outside said water-cooled, in 2/3 altitude range of metal mold, is provided with 2～5 groups of said water-cooled coil pipes.

5. hollow bloom water cooling casting device as claimed in claim 1 is characterized in that, the outer metal mold of said water-cooled is arranged with the fireproof heat-insulating layer at its outer surface in downward 1/3 altitude range in top.

6. like each described hollow bloom water cooling casting device of claim 1 to 5; It is characterized in that; Metal mold is merogenesis combined metal type in the outer metal mold of said water-cooled, the water-cooled; Constitute by 2～3 joints respectively along short transverse, fall to putting connection through the female seam of public affairs location nature between the two adjacent joint metal molds.

7. hollow bloom water cooling casting device as claimed in claim 6 is characterized in that, is equipped with at least one group of said water-cooled coil pipe in the outer metal mold of the said water-cooled of every joint.

8. hollow bloom water cooling casting device as claimed in claim 1 is characterized in that, a center cooling water pipe passes the bottom that said rising head casting mold stretches into metal mold in the said water-cooled, and said center cooling water pipe is solid on said rising head casting mold by frame.

9. hollow bloom water cooling casting device as claimed in claim 8 is characterized in that, said center cooling water pipe is arranged on the center line of metal mold in the said water-cooled; And be arranged on the said center cooling water pipe in the interior metal mold of said water-cooled; Be uniformly distributed with the multilayer aerial fog nozzle along short transverse; Establish at every layer circumferencial direction ring and to be uniformly distributed with 4～8 nozzles, can open every layer nozzle from bottom to top successively, thus metal mold order cooling from bottom to top in realizing.

10. hollow bloom water cooling casting device as claimed in claim 8 is characterized in that the bottom of said center cooling water pipe is provided with delivery port.

11. hollow bloom water cooling casting device as claimed in claim 10; It is characterized in that; Said hollow bloom water cooling casting device further comprises liquid level detection device; Said liquid level detection device comprise that liquid level gauge, liquid level gauge are cursory, said liquid level gauge is cursory to be arranged in the said water-cooled in the metal mold, is connected with said liquid level gauge through steel wire rope.

12. hollow bloom water cooling casting device as claimed in claim 1; It is characterized in that; Metal mold is the variable-diameter metal mold in the said water-cooled, and metal mold is made up of 2～3 joints in short transverse in this water-cooled, falls to putting connection through the female seam of public affairs location nature between the two adjacent joint metal molds.

13. hollow bloom water cooling casting device as claimed in claim 12; It is characterized in that; Metal mold has radially divided a plurality of interior metal mold unit in the said water-cooled of every joint; The upper/lower terminal of metal mold unit is connected with lower flange with upper flange respectively in each, forms metal mold in the complete said water-cooled, and each said interior metal mold unit all can radially move relative to said upper and lower flange.

14. hollow bloom water cooling casting device as claimed in claim 13 is characterized in that, metal mold is made up of upper flange, lower flange and 4～8 interior metal mold unit in the said water-cooled of every joint, has the gap between per two adjacent interior metal mold unit; Said upper flange is provided with lower flange upper edge radial direction and is the radial stay bolt hole that is connected said interior metal mold unit of putting; The metal mold unit was connected with lower flange with said upper flange respectively through the bolt that is arranged in the said stay bolt hole in each was said; The bolt of adpting flange can slide along the stay bolt hole when receiving the extruding of foundry goods contraction; Gap in adjacent between the metal mold unit is reduced by pressure, realizes reducing, to prevent the foundry goods contraction crack, to prevent foundry goods and interior metal mold locking.

15. hollow bloom water cooling casting device as claimed in claim 14 is characterized in that, is filled with filler in the gap between two adjacent said interior metal mold unit, said filler is the contractibility refractory material, to prevent casting initial stage drill steel in said gap.

16. like claim 14 or 15 described hollow bloom water cooling casting devices; It is characterized in that; The inwall seam crossing of metal mold is equipped with the baffle plate of a width greater than said gap width in the said water-cooled; Each said baffle plate is connected with two adjacent interior metal mold unit, and can slide with the contraction of this metal mold body.

17. hollow bloom water cooling casting device as claimed in claim 1 is characterized in that: the metal mold outer surface is equipped with the high-temperature refractory coating in the outer metal mold inner surface of said water-cooled, the water-cooled; Said high-temperature refractory coating is last thick thin down Wedging thickness coatings, makes the said die cavity that has applied said dope layer form generally cylindrical body.

18. hollow bloom water cooling casting device as claimed in claim 17 is characterized in that the thickness range of said high-temperature refractory coating is 0.1～20mm, is made up of dope layer and layer of sand.

19. hollow bloom water cooling casting device as claimed in claim 18; It is characterized in that; Said high-temperature refractory coating comprises the chrome ore layer of sand that is coated in metal mold outside wall surface in outer metal mold internal face of said water-cooled and the water-cooled, and is coated in the zircon flour coating layer on the said chrome ore layer of sand.

20. hollow bloom water cooling casting device as claimed in claim 1; It is characterized in that; Said water-cooled under casing comprises: outer case, be arranged on the interior water-cooled annular cover in the said outer case, said outer case with said in formation is connected with said die cavity between the water-cooled annular cover U-shaped cavity; The lower end of said outer case, interior water-cooled annular cover is fixedly connected with the under casing plate, and the upper surface of said outer case is provided with and the said water-cooled positioning spigot that joins of the lower end of metal mold outward; Said outer case comprises columniform body, and the wooden dipper that the tangential direction of the cylindrical outer case in edge forms constitutes wooden dipper to portion shape water-cooled under casing.

21. hollow bloom water cooling casting device as claimed in claim 20 is characterized in that, the outer case of said water-cooled under casing is that cast steel or the cast iron of 30～100mm is processed by wall thickness.

22. hollow bloom water cooling casting device as claimed in claim 20 is characterized in that, said interior water-cooled annular cover is made up of diameter less cylindric upper ring cap and the bigger cylindric ring set down of diameter, forms a convex column; Be provided with cylindric perforation endoporus in the water-cooled annular cover in said; Outer surface is formed a L shaped surface of revolution by anchor ring on the upper ring cap external cylindrical surface of minor diameter and the large diameter ring set down; One annular chill suit is arranged on the said down ring set on the anchor ring; The inner peripheral surface of this annular chill and the said L shaped surface of revolution constitute said U-shaped cavity, have built the refractory brick liner by laying bricks or stones in the vertical plane and the bottom surface of said U-shaped cavity.

23. hollow bloom water cooling casting device as claimed in claim 22; It is characterized in that; Be embedded with cooling water coil apart from the said L shaped surface of revolution 30～50mm place in the water-cooled annular cover in said; The entery and delivery port of said cooling water coil is drawn by the inner surface of said perforation endoporus, and it is outside to extend to said water-cooled under casing through said under casing plate central bore.

24. hollow bloom water cooling casting device as claimed in claim 20; It is characterized in that; Said wooden dipper is being provided with refractory brick tube in the portion, said refractory brick tube has cross gate, and an end of said cross gate extends horizontally to said U-shaped cavity; And constituting said tangent line runner gate, the other end of said cross gate forms sprue straight up through 90 ° of turning bricks.

25. hollow bloom water cooling casting device as claimed in claim 22; It is characterized in that said wooden dipper is being provided with refractory brick tube in the portion, said refractory brick tube has cross gate; One end horizontal-extending of said cross gate; Run through said outer ring chill, the annular tile liner is communicated with the U-shaped cavity, and constitutes said tangent line runner gate, the other end of said cross gate forms sprue straight up through 90 ° of turning bricks.

26. hollow bloom water cooling casting device as claimed in claim 20 is characterized in that, said rising head casting mold comprises: rising head case, the hollow annular core that sets within it; The inwall of said rising head case is provided with the thermal insulation fire-resistant material layer, and the inwall of said hollow annular core is provided with adiabatic fire-resistant cotton layer, and the intracavity inter-connection of the inner chamber of said hollow annular core and the interior metal mold of water-cooled.

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