CN102834204B - Device for vacuum supplying molten metal - Google Patents

Device for vacuum supplying molten metal Download PDF

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Publication number
CN102834204B
CN102834204B CN201180017437.0A CN201180017437A CN102834204B CN 102834204 B CN102834204 B CN 102834204B CN 201180017437 A CN201180017437 A CN 201180017437A CN 102834204 B CN102834204 B CN 102834204B
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CN
China
Prior art keywords
ladle
cover plate
molten metal
motlten metal
supply pipe
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CN201180017437.0A
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Chinese (zh)
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CN102834204A (en
Inventor
堀信二
生泽万琴
白川克行
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Nippon Crucible Co Ltd
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Nippon Crucible Co Ltd
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Priority to JP2010-085803 priority Critical
Priority to JP2010085803 priority
Application filed by Nippon Crucible Co Ltd filed Critical Nippon Crucible Co Ltd
Priority to PCT/JP2011/052060 priority patent/WO2011125366A1/en
Publication of CN102834204A publication Critical patent/CN102834204A/en
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Publication of CN102834204B publication Critical patent/CN102834204B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00Equipment for supplying molten metal in rations
    • B22D39/06Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/04Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • B22D41/05Tea-pot spout ladles

Abstract

A device for vacuum supplying molten metal, capable of efficiently supplying the molten metal to a molten metal conveying ladle. A device for vacuum supplying molten metal to a molten metal conveying ladle (2) equipped with a ladle body (20) having a pouring opening (26) into which molten metal is poured and also having a containing space (21) which contains the molten metal. The device is provided with: a lid plate (3) which is supported above the ladle body (20) so as to be vertically movable and which can close the pouring opening (26) of the ladle body (20) to seal the containing space (21); a lifting mechanism (4) for vertically moving the lid plate (3); a molten metal supplying pipe (6) provided to the lid plate (3), the molten metal supplying pipe (6) connecting the inside and outside of the containing space (21) and capable of supplying molten metal to the containing space (21); a vacuum device (5) for reducing the pressure within the containing space (21) and introducing molten metal into the containing space (21) from the suction opening (60) at the front end of the molten metal supplying pipe (6); and a support mechanism (7) for pivotably supporting the ladle body (20).

Description

The device of vacuum molten metal feed
Technical field
The present invention relates to vacuum molten metal feed device, in order to motlten metal is delivered to conveying ladle from smelting furnace.
Background technology
When by die casting process manufacture cast aluminium product etc., usually cast in the factory being equipped with a lot of die casting machine, to boost productivity.By keeping stove transfer to cast dish and entered die casting machine by poured with molten metal from cast dish molten metal feed from motlten metal motlten metal.Keep stove must keep a certain amount of motlten metal at any time.By the metal-cured one-tenth ingot bar be once melted and then but in the smelting furnace that is located in of or outside manufacture inner in Foundry Works, refuse metal is inefficient in the energy.Therefore, delivery of molten metal ladle is usually used to be transported to Foundry Works by the metal manufacturing the melt in furnace be located in.Such as, Patent Document 1 discloses an example of this delivery of molten metal ladle.
As shown in Figure 6, the delivery of molten metal ladle 100 of the type comprises the ladle body 101 with the memory space 106 storing motlten metal, the top cover 103 being attached to the cast entrance 102 on the top surface being formed in ladle body 101 in openable mode and the poured with molten metal pipe 104 be arranged in ladle body 101, wherein by inclination ladle body 101, the tap hole of motlten metal from the end being formed in poured with molten metal pipe 104 (tapping outlet) 105 is discharged, so that supply carrys out the motlten metal of self-sustaining stove.Another example of delivery of molten metal ladle is pressure tapping shaped steel bag, this pressure tapping shaped steel handbag is drawn together the gas access (not shown) for compressed air being introduced ladle body and is connected to the compressed air supply system (such as compressor) of this gas access, wherein sends by the tap hole in tapping portion the motlten metal be stored in ladle to apply pressure to molten metal surface by force by compressed air being introduced ladle body.
Here, the cast entrance 102 of ladle body 101 for such as entering to be positioned at memory space 106 below cast entrance 102 by poured with molten metal, to remove scum silica frost (aluminium oxide etc.) from molten metal surface and measure the operation of temperature of motlten metal.In manufactured place, when motlten metal is in a furnace poured into memory space 106 by cast entrance 102, use the device 200 of vacuum molten metal feed as shown in Figure 7.
The device 200 of the vacuum molten metal feed shown in Fig. 7 is provided with: the support member 201 vertically moved back and forth up and down by crane etc.; The cover plate 202 hung in swingable mode by support member 201; Be connected to cover plate 202, for the motlten metal be stored in smelting furnace 205 being transferred to the motlten metal supply pipe 203 of ladle body 101; For keeping the support 204 of ladle body 101; And the vacuum plant of such as vavuum pump (not shown).SS (not shown) is formed in cover plate 202, makes this SS lead to the memory space of ladle body 101 in the mode that can be communicated with, and is connected to this SS from the suitable pipe of the such as flexible pipe of vacuum plant extension.In Fig. 7,206 is counterweights, and passes through the suitably weight of counterweight 206 and the weight of motlten metal supply pipe 203, under cover plate 202 is maintained at the good level of balance.
When motlten metal is transferred to the memory space of ladle body 101 from smelting furnace 205, cover plate 202 is lowered by crane etc., the surface of cover plate 202 is contacted with the end face of ladle body 101, to cover cast entrance with cover plate 202, thus sealed storage space.The inside of ladle body 101 is made to stand step-down (vacuum draw) by using vacuum plant, extract the motlten metal in smelting furnace 205 out from the pump orifice the end of motlten metal supply pipe 203, thus motlten metal is transferred to the inside of ladle body 101.
Citing document list
Patent document
Patent document 1: Japanese Unexamined Patent Publication No.2001-287021.
Summary of the invention
Technical problem
When repeatedly using the device 200 with the vacuum molten metal feed of said structure to be transferred in ladle body 101 by motlten metal, slag 207 etc. may adhere to the surface of the end of motlten metal supply pipe 203.When slag 207 etc. adheres to the end of motlten metal supply pipe 203, the weight of motlten metal supply pipe 203 correspondingly increases and can not maintain the balance with counterweight 206.This causes cover plate 202 to be retained as to tilt towards motlten metal supply pipe 203.Result, when the cast entrance tegmentum plate 202 of ladle body 101 covers, as shown in double dot dash line in Fig. 7, due to the inclination of cover plate 202, cover plate 202 does not contact with ladle body 101, thus between cover plate 202 and ladle body 101, form space S (gap).This causes air to leak from cast entrance, make to lose the ability by vacuum plant vacuum draw, and obstruction carries out motlten metal supply operation effectively.
Because cover plate 202 and motlten metal supply pipe 203 are combined into single body and are attached to support member 201 in swingable mode, so when cover plate 202 moves up and down, the end of motlten metal supply pipe 203 may laterally swing.If the end of motlten metal supply pipe 203 owing to striking sidewall 205A of smelting furnace 205 etc. and destroying, then must stop motlten metal supply to operate.Inefficiency during this causes motlten metal supply to operate similarly.
Make the present invention in view of the above-mentioned problems, and the object of the invention is the device providing a kind of vacuum molten metal feed, this device allows the operation effectively carrying out motlten metal being fed to conveying ladle.
For the technical scheme of problem
The object of this invention is to provide a kind of device motlten metal vacuum being supplied into the memory space of delivery of molten metal ladle.Delivery of molten metal ladle comprises ladle body, and ladle body has cast entrance on its top surface and holds the memory space of motlten metal, and motlten metal is from the cast of cast entrance.This device is provided with: cover plate, and described cover plate to be supported on above ladle body so that can vertically movement, and cover plate can be closed by making the lower surface of cover plate contact with the top surface of ladle body and poured into a mould entrance, thus sealed cast entrance; The hoisting mechanism of cover plate can be moved up and down; Motlten metal supply pipe, this motlten metal supply pipe passes cover plate and is connected to outside and the inside of memory space in the mode that can be communicated with, so that motlten metal can be fed to memory space; Vacuum plant, this vacuum plant is used for from the pump orifice the end of motlten metal supply pipe, motlten metal being introduced memory space by making memory space step-down; And swing mechanism, when ladle body and cover plate contact with each other, by swinging ladle body or passing through only to swing cover plate, this swing mechanism can make the basal surface of cover plate contact with the top surface of ladle body.
In the preferred embodiments of the present invention, this swing mechanism comprises: the fixture of fixing motlten metal supply pipe; And in swingable mode, fixture is connected to the connector of cover plate, wherein, this hoisting mechanism flatly supports fixture and move up and down fixture while the level maintaining fixture.
In the device of the vacuum molten metal feed of embodiment above, preferably flexible seals is set between fixture and cover plate, so that around motlten metal supply pipe, to provide seal between fixture and cover plate.
In another preferred embodiment of the present invention, swing mechanism is preferably formed as the supporting mechanism that can make ladle body oscillatory.
In the device of the vacuum molten metal feed of described embodiment above, hoisting mechanism preferably flatly supports cover plate and move up and down cover plate while the level maintaining cover plate.
Supporting mechanism preferably includes: the mounting seat being fixed to floor surface, be arranged on one or more spring in mounting seat, and be arranged on spring, that ladle body can be kept support, wherein, due to the elastic force of spring, this support can free inclination relative to mounting seat.
Supporting mechanism can comprise: be fixed on the mounting seat in floor surface, be arranged on the rubber slab in mounting seat, and be arranged on rubber slab, that ladle body can be kept support, wherein due to the elastic force of rubber slab, this support can free inclination relative to mounting seat.
Further preferably mounting seat comprises the lift that can raise and reduce this support.
Beneficial effect of the present invention
Motlten metal can be fed to delivery of molten metal ladle by the device of vacuum molten metal feed of the present invention effectively.
Accompanying drawing explanation
Fig. 1 is the front view of the device of vacuum molten metal feed according to an embodiment of the invention.
Fig. 2 is the side view of the device of vacuum molten metal feed according to an embodiment of the invention.
Fig. 3 is the longitudinal section of the part that structure shown in Fig. 2 is shown.
Fig. 4 is the front view of the device of vacuum molten metal feed according to another embodiment of the invention.
Fig. 5 is the longitudinal section of the major part of the device of the vacuum molten metal feed illustrated according to another embodiment of the invention.
Fig. 6 is the sectional view of conventional melt metal conveying ladle.
Fig. 7 is the front view of the schematic structure of the device that traditional vacuum molten metal feed is shown.
Detailed description of the invention
Below with reference to the accompanying drawings one embodiment of the present of invention are explained in detail.Fig. 1 and Fig. 2 illustrates the schematic structure of the device 1 of vacuum molten metal feed according to an embodiment of the invention.Fig. 3 is the longitudinal section of Fig. 2.In Fig. 3, eliminate hoisting mechanism 4 and vacuum plant 5.The device 1 of vacuum molten metal feed for future self-thermo furnace 10 poured with molten metal (transfer) to delivery of molten metal ladle 2, described smelting furnace 10 is produced and stores motlten metal, and described delivery of molten metal ladle 2 is in the place of the motlten metal manufacturing such as aluminium.
Motlten metal is fed to the motlten metal being positioned at casting place and keeps stove (not shown) by delivery of molten metal ladle 2 for the motlten metal by transporting from motlten metal manufacturing site location.As shown in Figures 1 to 3, delivery of molten metal ladle 2 is provided with tubular ladle body 20 and the poured with molten metal pipe 22 of closed bottom, ladle body 20 comprises and stores the memory space 21 of motlten metal, and poured with molten metal pipe 22 to allow the poured with molten metal that is stored in memory space 21 by inclination ladle body 20 to outside.
Ladle body 20 is provided with planar top surface and emerge, and by forming this ladle body 20 at the flame retardant coating 20B be made up of thermal insulating material or refractory material of the inner lining of the metal metal shell layer 20A such as steel.The example of thermal insulating material comprises thermal isolation brick, ceramic fiber type felt, thermal isolation plate, plaster etc.The example of refractory material comprises fire proofing tile, can cast refractory body, plastics refractory body etc.
Ladle body 20 is provided with the ladle lower portion 23 that can store motlten metal, and ladle upper portion 24, and the bottom of this ladle upper portion 24 is connected to ladle lower portion 23, to cover the top opening 25 of ladle lower portion 23.Ladle lower portion 23 and ladle upper portion 24 can be formed with integral manner, or are individually formed and then use connector to connect ladle lower portion 23 and ladle upper portion 24.
Cast entrance 26 is formed in the approximate centre part of the top surface of ladle body 20 (ladle upper portion 24), and described cast entrance 26 is for entering memory space 21 by poured with molten metal.Ladle upper portion 24 also comprises air transporting tube 27, and air transporting tube 27 leads to the inside and outside of ladle body 20 in the mode that can be communicated with, and reduces internal pressure by making air leave the memory space 21 in ladle body 20.The air transporting tube 27 being connected to vacuum plant 5 described below is formed as along the direction tilted upward from ladle upper portion 24 outwardly.In this structure, memory space 21 stands step-down (vacuum draw) by vacuum plant 5 via air transporting tube 27, thus allows ladle body 20 inside to become vacuum or almost vacuum.Note, although not shown, ladle upper portion 24 arranges openable top cover, thus the cast entrance 26 be formed in top surface can be made to be capped.
Poured with molten metal pipe 22 is molten metal flow paths, and described poured with molten metal pipe 22 is communicated with the inside and outside of the memory space 21 of ladle body 20.Poured with molten metal pipe 22 is formed as along the direction that tilts upward from the side surface of ladle lower portion 23 outwardly.The flame retardant coating 22B formed by thermal insulating material or refractory material by lining on the inner side of the metal tube 22A formed by metals such as steel and form poured with molten metal pipe 22.Available thermal insulating material is identical with those use in ladle body 20 with the example of refractory material.Poured with molten metal pipe 22 can be integral with ladle lower portion 23, maybe can be individually formed and then use connector to connect poured with molten metal pipe 22 and ladle lower portion 23.
Flange or similar block piece 29 are attached to the end of the tap hole 28 of poured with molten metal pipe 22 removably.Block piece 29 is for sealing tap hole 28, thus when step-down is stood via vacuum plant 5 in the inside of ladle body 20, the tap hole 28 not from poured with molten metal pipe 22 leaks by air.Note, temperature resistant encapsulation agent can be set between tap hole 28 and block piece 29.
The device 1 of the vacuum molten metal feed of the present embodiment comprises: cover plate 3, and described cover plate 3 is disposed in above ladle body 20 so that can be vertically reciprocal; Hoisting mechanism 4, described hoisting mechanism 4 makes cover plate 3 vertically reciprocal; Vacuum plant 5, described vacuum plant 5 makes memory space 21 step-down of ladle body 20; Motlten metal supply pipe 6, the memory space 21 of motlten metal suction ladle body 20 that described motlten metal supply pipe 6 will be stored in smelting furnace 10; And supporting mechanism 7, described supporting mechanism 7 supports ladle body 20 in swingable mode.
Cover plate 3 is formed by refractory material or is formed by refractory material and thermal insulating material, and the circumferential surface of cover plate 3 is covered by metal-back 30.The diameter of cover plate 3 is greater than the diameter of the cast entrance 26 in the top surface being formed in ladle upper portion 24, and cover plate 3 has enough thickness, and the emerge of cover plate 3 contacts to cover with the planar top surface of ladle upper portion 24 and stops and pours into a mould entrance 26, thus the memory space 21 of ladle body 20 can be sealed.This prevents when step-down is stood via vacuum plant 5 in the inside of ladle body 20, and air etc. leak between cover plate 3 and ladle upper portion 24.Note, heat-resisting (such as carbon back) sealant etc. can be set between cover plate 3 and ladle upper portion 24, in order to improve sealing.In the approximate centre part of cover plate 3, form patchhole 31, motlten metal supply pipe 6 can insert this and insert in the hole.
Motlten metal supply pipe 6 is a passage, and in the channels, motlten metal flow to the inside and outside of the memory space 21 of ladle body 20 in the mode that can be communicated with.Such structure motlten metal supply pipe 6, that is: make by via vacuum plant 5 pairs of inner step-downs of ladle body 20, thus by extracting motlten metal from the suction opening 60 on the end being arranged on supply pipe 6, the motlten metal be stored in smelting furnace 10 is transferred to ladle body 20.Motlten metal supply pipe 6 at two location bendings, thus passes the approximate centre part of cover plate 3 at the floss hole 61 of the end of motlten metal supply pipe 6 and is arranged in above memory space 21 after through cast entrance 26.Suction opening 60 on the end of motlten metal supply pipe 6 is arranged in ladle body 20 outside and faces down.Motlten metal supply pipe 6 is fixed to cover plate 3, and inserts in a gastight manner in the patchhole 31 of cover plate 3, thus the penetrating component not from cover plate 3 leaks by air or motlten metal.In order to increase sealing, can the seals such as O shape ring be set between motlten metal supply pipe 6 and cover plate 3.
Motlten metal supply pipe 6 is formed by the flame retardant coating 63 formed by calcium silicide refractory material etc. metal tube 62 lining, and the abrasion resistance that the flowing that flame retardant coating 63 improves thermal isolation and opposing motlten metal causes.In addition, in order to prevent the damage caused by motlten metal when motlten metal supply pipe 6 contacts with motlten metal, preferably, the surface coverage of metal tube 62 has refractory material, such as silicon nitride.
Alternately, can be formed by earthenware at the memory space insertion portion 64 of the end of motlten metal supply pipe 6.This structure improves the heat resistance of motlten metal supply pipe 6, and prevent the metallic member of motlten metal supply pipe 6 to be melted and be mixed into the motlten metal be stored in memory space 21, thus the quality of the motlten metal be stored in memory space 21 can be maintained.
Hoisting mechanism 4 is the devices from direction upwards, cover plate 3 being contacted with the top surface of ladle body 20 by moving up and down cover plate 3 while being supported under level by cover plate 3.Hoisting mechanism 4 comprises: perpendicular to the vertically arranged pair of guide rails 40 in ground; The movable body 41 on each guide rail 40 is arranged in the mode that can swing up and down; And the movable framework 42 to be supported by each movable body 41.
Each guide rail 40 is all straight steel bars parallel to each other.They are placed by with orthostatism facing with each other, and ladle body 20 place between which.Movable body 41 has tubular shape, and has ball bearing (not shown) therein.Each guide rail 40 is all inserted in movable body 41, thus movable body 41 can swing along the vertically independent of guide rail 40.
Movable framework 42 is provided with about a pair hanger bar 43 parallel with each guide rail 40 and connects the horizontal brace rod 44 of each hanger bar 43; And movable body 41 is connected to the side of each hanger bar 43.Therefore, movable framework 42 can be guided by each guide rail 40 and pump while its posture of maintenance.
Cover plate 3 is connected to the lower end of each hanger bar 43, so that under being in level.In addition, in the center of connecting rod 44, retainer ring 45 is formed.By the hook 46 being installed to derrick car (not shown) being inserted and locking onto retainer ring 45, under cover plate 3 can being supported on level by crane via movable framework 42, and cover plate 3 can move up and down while its level of maintenance above ladle body 20.
Supporting mechanism 7 forms swing mechanism 8, and when ladle body 20 contacts with cover plate 3, by this swing mechanism 8, the lower surface of cover plate 3 contacts with the top surface of ladle body 20.In this embodiment, by making ladle body 20 swing relative to cover plate 3, the lower surface of cover plate 3 contacts with the top surface of ladle body.The supporting mechanism 7 of the present embodiment comprises: the mounting seat 70 being fixed to the surface on ground; Be arranged in mounting seat 70, that ladle body 20 can be kept support 71; And the support member 72 be positioned between mounting seat 70 and support 71, support member 72 is with can relative to the mode of mounting seat 70 free inclination flatly supporting bracket 71.
The size of mounting seat 70 corresponds to the size of support 71.In the present embodiment, mounting seat 70 is formed as lift.This lift uses swing arm type (pantagraph-type) lifting device 75 to move up and down horizontal lifting platform 74 relative to base 73.Lift is by mobile cylinder mechanism 76, thus stretching, extension or retraction swing arm are by the height of support 71, namely the maintenance of ladle body 20 is highly adjusted to required level, and under lifting platform 74 being remained on level, wherein cylinder mechanism 76 is drive sources of lifting device 75 simultaneously.
In the present embodiment, support member 72 is made up of the rubber spring 77 of multiple (being 4 in this example) elastically deformable.Rubber spring 77 has the cylindrical form by being formed around wind spring molded rubber material, and rubber spring 77 is attached to four bights between lifting platform 74 and support 71.Therefore, support 71 is flexibly attached to lifting platform 74 via rubber spring 77, and support 71 is supported on lifting platform 74 usually under level.When by apply from upper direction pressure and pressing stent 71 time, rubber spring 77 is according to via the elastic deformation of support 71 applied pressure, and support 71 is towards rear, front, left or right free inclination.By tilt stand 71, the ladle body 20 be disposed on support 71 of delivery of molten metal ladle 2 can swing along any direction.
The shape of rubber spring 77 is not limited to be cylindricality, but can be such as the general conical (tapered) stretched towards lower end, can be maybe plate spring shape.
In the present embodiment, multiple rubber spring 77 is used as support member 72; But, to support member 72 not restriction, as long as support member can flatly supporting bracket, enable described support relative to mounting seat 70 free inclination.Such as, as shown in Figure 4, as support member 72, the slab rubber cushion 78 with elastic force can insert between lifting platform 74 and support 71.
Equally in the embodiment shown in fig. 4, support 71 is flexibly attached to lifting platform 74 via rubber mount 78, and support 71 is supported on lifting platform 74 with level usually.When by apply from upper direction pressure and pressing stent 71 time, rubber mount 78 is according to via the elastic deformation of support 71 applied pressure, and support 71 is towards rear, front, left or right free inclination.By tilt stand 71, the ladle body 20 be disposed on support 71 of delivery of molten metal ladle 2 can swing along any direction.Note, the viscoelastic body with elastic force being similar to rubber mount can be used to carry out alternative rubber mount 78.
The size of support 71 corresponds to the size of ladle body 20, and it is the plate-like shape with adequate thickness.On the top surface of support 71, moving end-wall 79 is prevented vertically to be arranged to around ladle body 20.Because prevent the inside of moving end-wall 79 from directly receiving and support the outer surface of ladle body 20, so ladle body 20 can tilt along any direction and can not be shifted towards the incline direction of support 71 or drop together with support 71, prevent ladle body 20 from dropping from support 71 thus.
Next, the device 1 of above-mentioned vacuum molten metal feed hereafter explanation is used motlten metal to be transferred to the method for the ladle body 20 of delivery of molten metal ladle 2 from the smelting furnace 10 motlten metal manufacturing site location.First, the ladle body 20 of delivery of molten metal ladle 2 is held in place preventing in moving end-wall 79 on the top surface of support 71.Subsequently, the hook of crane etc. inserts in the retainer ring 45 of movable framework 42, to keep retainer ring 45, thus under movable framework 42 is suspended on level.
By moving down movable framework 42, cover plate 3 is shifted downwards, thus presses the top surface of ladle body 20 (ladle upper portion 24) from direction, upside, and wherein motlten metal supply pipe 6 is attached to cover plate 3.In this arrangement, cover plate 3 is configured to flatly be supported by hoisting mechanism 4, and the lower surface of cover plate 3 is pressed against the top surface of ladle body 3 (ladle upper portion 24) while maintaining its level.This allows the top surface of ladle body 20 (ladle upper portion) and the lower surface of cover plate 3 to contact with each other.
Now, when moving down cover plate 3, even if the level of cover plate 3 destroys balance, and the lower surface of cover plate 3 is pressed against the top surface of ladle body 20 (ladle upper portion 24) under certain inclination, but because ladle body 20 supports with swingable mode supported body 7, when cover plate 3 is pressed against the top surface of ladle body (ladle upper portion 24), ladle body 20 (ladle upper portion 24) can together with support 71 along any direction free inclination to mate the inclination of cover plate 3.Result, the top surface of ladle body 20 (ladle upper portion 24) and the lower surface of cover plate 3 become and contact with each other, thus in any case, the cast entrance 26 in the top surface of ladle body 20 (ladle upper portion 24) can be closed completely by cover plate 3.Therefore, in the device 1 of the vacuum molten metal feed of the present embodiment, gap will not be formed between cover plate 3 and ladle body 20; Therefore, can sealed storage space 21 satisfactorily.In this structure, block piece 29 is used to close the opening 28 of poured with molten metal pipe 22.
Subsequently, step-down (vacuum draw) is stood to make the inside of ladle body 20 by vacuum plant 5 being connected to air transporting tube 27, can from the pump orifice 60 of motlten metal supply pipe 6 leading to smelting furnace 10 motlten metal be extracted and be pressed into memory space 21 by floss hole 61, thus motlten metal be transferred to ladle body 20.Because the opening 28 of poured with molten metal pipe 22 is closed by block piece 29, so motlten metal will not overflow from opening 28.
When completing motlten metal supply operation, ladle body 20 internal pressure turns back to reset pressure.Afterwards, by the movable framework 42 that moves up, removed from ladle body 20 (ladle upper portion 24) by cover plate 3, motlten metal supply pipe 6 is attached to cover plate 3.Then, after closedown top cover (not shown), the maintenance stove of the die casting machine carrying out casting operation transferred to by the delivery of molten metal ladle 2 storing motlten metal by use fork truck etc.
Device 1 tool with the vacuum molten metal feed of structure above has the following advantages.Even if make slag etc. be bonded to region near the pump orifice 60 of the end of motlten metal supply pipe 6 owing to repeatedly motlten metal being fed to ladle body and the weight of motlten metal supply pipe 6 correspondingly increases, cover plate 3 also as far as possible flatly can be supported by hoisting mechanism 4, and carries out oscilaltion operation while maintenance level.Any risk that the end that this prevent motlten metal supply pipe 6 in the oscilaltion process of cover plate 3 laterally swings.As a result, the end of motlten metal supply pipe 6 can not such as destroy owing to striking the sidewall of smelting furnace 10.
Even if slags etc. are bonded to region near the pump orifice 60 of the end of motlten metal supply pipe 6 and the weight of motlten metal supply pipe 6 correspondingly increases, thus towards motlten metal supply pipe 6 this roll oblique while destroy cover plate 3 level and make cover plate 3 be pressed against the top surface of ladle body 20 (ladle upper portion 24), but ladle body 20 supports with swingable mode supported body 7, thus ladle body 20 (ladle upper portion 24) can along any direction free inclination to mate the inclination of cover plate 3.As a result, the lower surface of cover plate 3 becomes and contacts with the top surface of ladle body 3 (ladle upper portion 24), and the cast entrance 26 in the top surface of ladle body 20 (ladle upper portion 24) is fully closed.This prevent and form gap between cover plate 3 and ladle body 20; Therefore, when using vacuum plant 5 to carry out vacuum draw, air will not leak from cast entrance 26, and can molten metal feed effectively.
Fig. 5 is the longitudinal section of the structure of the major part of the device 1 of the vacuum molten metal feed illustrated according to another embodiment of the invention.In this embodiment, the device 1 of vacuum molten metal feed comprises: cover plate 3, and described cover plate 3 is disposed in above ladle body 20 can vertically move back and forth; Hoisting mechanism (not shown), described hoisting mechanism is used for cover plate 3 is pumped; Vacuum plant 5, described vacuum plant 5 makes memory space 21 step-down of ladle body 20; Motlten metal supply pipe 6, the motlten metal be stored in smelting furnace (not shown) is fed to the memory space 21 of ladle body 20 by described motlten metal supply pipe 6; And swing mechanism 8, when ladle body 20 contacts with cover plate 3, described swing mechanism 8 makes the lower surface of cover plate 3 contact with the top surface of ladle body 201.In the device 1 of the vacuum molten metal feed of this embodiment, the parts identical with the device 1 of vacuum molten metal feed are marked with identical Reference numeral, and the description thereof will be omitted.In addition, in the device 1 of the vacuum molten metal feed of this embodiment, the ladle body 20 of delivery of molten metal ladle 2 is placed on smooth erecting bed (not shown), and described smooth erecting bed is fixed to ground.
When ladle body 20 contacts with cover plate 3, the swing mechanism 8 of the present embodiment is by only swinging cover plate 3 relative to ladle body 20 and making the lower surface of cover plate 3 contact with the top surface of ladle body 20.As shown in Figure 5, swing mechanism 8 comprises: fixture 80, and motlten metal supply pipe 6 is fixed by this fixture 80; And multiple connector 81, described connector 81 connects the cover plate 3 be positioned at below fixture 80 in swingable mode.
Fixture 80 such as has the plate-like form be made of metal.In the approximate centre part of fixture 80, form through hole 83, motlten metal supply pipe 6 is inserted in this through hole.Floss hole 61 is designed in the end of motlten metal supply pipe 6, also to pass through to be positioned at above memory space 21 through fixture 80 and cover plate 3 through the cast entrance 26 of ladle body 20.By the plate surface using the fixed form (not shown) of such as bolt or nut the flange 65 of motlten metal supply pipe 6 to be fixed to fixture 80, motlten metal supply pipe 6 is fixed to fixture 80.As described below, this prevents the motlten metal supply pipe 6 when fixture 80 moves up and down from trembleing.Note, motlten metal supply pipe 6 only inserts in the patchhole 31 of cover plate 3, and motlten metal supply pipe 6 is not connected integratedly.
Therefore, in order to prevent air etc. from the clearance leakage between the patchhole 31 and motlten metal supply pipe 6 of cover plate 3 and enter the memory space 21 etc. of ladle body 20, tubular seal 82 is set between fixture 80 and cover plate 3, makes it around the periphery of motlten metal supply pipe 6.Seal 82 is formed to have tubular form by having flexible material, and can along any direction Free Transform.In the present embodiment, seal 82 has the flexible corrugation tubular construction along whole length, and each flange being wherein set to upper end or bottom is fixed to the lower surface of fixture 80 or the top surface of cover plate 3 by welding etc.
The space around the motlten metal supply pipe 6 be between fixture 80 and cover plate 3 can be made airtight by using seal 82.This prevent the air when using vacuum plant 5 to carry out vacuum draw to leak from the patchhole 31 of cover plate 3 and enter the memory space 21 of ladle body 20, thus allow memory space 21 reliably to be sealed.Because seal 82 has flexibility and entirety is bellows structure, so seal 82 can along any direction, such as up and down, front and back and left and right distortion (extensible and flexible); Therefore, as described below, even if when cover plate 3 swings relative to fixture 80, mating the swing of cover plate 3 by making seal 82 be out of shape ideally, easily can maintain the sealing around the motlten metal supply pipe 6 between fixture 80 and cover plate 3.
Fixture 80 is flatly kept by hoisting mechanism (not shown), and is supported can move up and down while its level of maintenance.This makes the cover plate 3 of the bottom being connected to fixture 80 to move with the mode of fixture 80 one; Therefore, cover plate 3 can be made to contact with the upper portion of ladle body 20.Hoisting mechanism can have the structure identical with the structure of the hoisting mechanism 4 shown in Fig. 1 and 2.In the present embodiment, hoisting mechanism is connected to the lower end of each left and right hanger bar of movable framework, makes fixture 80 become level.
Connector 81 is formed by elastomeric material.In the present embodiment, connector 81 is formed by elastically deformable rubber spring.The upper end of connector 81 is fixed to fixture 80 and the bottom of connector 81 is fixed to cover plate 3.Connector 81 is arranged in multiple position, so that equably around motlten metal supply pipe 6.This allows cover plate 3 be connected to fixture 80 in swingable mode and be usually supported on below fixture 80 with level.When cover plate 3 moves down and contacts with the top surface of ladle body 20, each connector 81 is flexibly out of shape and only cover plate 3 swings along any direction (such as back and forth or left and right) relative to ladle body 20.Due to the swing of cover plate 3, when ladle body 20 contacts with cover plate 3, the lower surface of cover plate 3 becomes and contacts with the top surface of ladle body 20, thus the cast entrance 26 in the top surface of ladle body 20 is closed completely by cover plate 3.This prevent and form gap between cover plate 3 and ladle body 20, thus allow sealed storage space 21 satisfactorily.
Even if therefore pump orifice 60 near zone making slag etc. be bonded to the end of motlten metal supply pipe 6 owing to repeatedly motlten metal being fed to ladle body 20 also increases the weight of motlten metal supply pipe 6 in this side of end, but the fixture 80 of fixing motlten metal supply pipe 6 is also as far as possible flatly supported by hoisting mechanism 4.The risk that the end that this prevent motlten metal supply pipe 6 in the oscilaltion operation of cover plate 3 laterally swings.As a result, the end of motlten metal supply pipe 6 can not such as destroy owing to striking the sidewall of smelting furnace 10.
In addition, because cover plate 3 is not directly connected to motlten metal supply pipe 6, even if so make the weight of motlten metal supply pipe 6 increase in terminal part office due to the bonding of slag etc., thus make the level of fixture 80 become a little destroy and motlten metal supply pipe 6 tilt a little towards this side of end, cover plate 3 also can not tilt with integral manner together with motlten metal supply pipe 6.In this layout, even if when fixture 80 tilts a little, because cover plate 3 supports with swingable mode fixture 80 via connector 81, so when cover plate 3 contacts with ladle body 20, swing cover plate 3 according to ladle body 20 and the top surface making the lower surface of cover plate 3 with ladle body 20 is contacted.Therefore, in this case, the cast entrance 26 in the top surface of ladle body 20 also will be closed by cover plate 3 completely.
As mentioned above, in the device 1 of the vacuum molten metal feed of the present embodiment, the cast entrance 26 in the top surface of ladle body 20 also can be closed by cover plate 3 completely; Therefore, between cover plate 3 and ladle body 20, gapless is formed, and can seal the memory space 21 of ladle body 20 satisfactorily.
Described above is embodiments of the invention; But embodiments of the invention are not limited thereto.Such as, in the present embodiment, air transporting tube 27 is set to the ladle body 20 of delivery of molten metal ladle 2, for connecting the vacuum plant 5 making memory space 21 step-down.But structure is not limited thereto.The pipe being connected to memory space 21 can be set to lid 3, and vacuum plant 5 can be connected to this pipe.
The explanation of Reference numeral
The device of 1 vacuum molten metal feed
2 delivery of molten metal ladles
3 cover plates
4 hoisting mechanisms
5 vacuum plants
6 motlten metal supply pipes
7 supporting mechanisms
8 swing mechanisms
20 ladle bodies
21 memory spaces
26 cast entrances
60 pump orifices
70 mounting seat
71 supports
77 rubber springs
78 rubber mounts
80 fixtures
81 connectors
82 seals

Claims (10)

1. a device for vacuum molten metal feed,
Described device is used for motlten metal to be supplied into delivery of molten metal ladle,
Described delivery of molten metal ladle comprises ladle body, and described ladle body has the cast entrance on the top surface being positioned at described ladle body and holds the memory space of motlten metal, and motlten metal is poured into a mould from described cast entrance;
The device of described vacuum molten metal feed comprises:
Cover plate, described cover plate is so that can the mode of vertical movement be supported on above described ladle body, and the lower surface of described cover plate can close described cast entrance by contacting with the top surface of described ladle body;
Hoisting mechanism, described hoisting mechanism can move up and down cover plate;
Motlten metal supply pipe, motlten metal can be fed to memory space by the outside and inside being communicated with described memory space through cover plate by described motlten metal supply pipe;
Vacuum plant, described vacuum plant is for introducing described memory space from the pump orifice the end at described motlten metal supply pipe by motlten metal by making described memory space step-down; And
Swing mechanism, when described ladle body contacts with described cover plate, by swinging described ladle body or only swinging described cover plate, described swing mechanism can make the lower surface of described cover plate contact with the top surface of described ladle body.
2. the device of vacuum molten metal feed according to claim 1, wherein, described swing mechanism comprises:
Fixture, described fixture is used for fixing described motlten metal supply pipe; And
Connector, described connector is used for connecting described cover plate relative to described fixture in swingable mode;
Wherein, under described fixture is supported on level by described hoisting mechanism and maintenance described level while move described fixture.
3. the device of vacuum molten metal feed according to claim 2, wherein, described motlten metal supply pipe is inserted into inserting in the hole of described cover plate, and seal is arranged between described fixture and described cover plate,
Wherein, described seal has flexibility and is arranged to around described motlten metal supply pipe, thus the space sealed in a gastight manner around described motlten metal supply pipe, to prevent air from the clearance leakage between described motlten metal supply pipe and the described patchhole of described cover plate and to enter described memory space.
4. the device of vacuum molten metal feed according to claim 1, wherein, described swing mechanism is made up of the supporting mechanism supporting described ladle body in swingable mode.
5. the device of vacuum molten metal feed according to claim 4, wherein, described hoisting mechanism flatly supports described cover plate and move up and down described cover plate while remaining under level by described cover plate.
6. the device of vacuum molten metal feed according to claim 4, wherein said supporting mechanism comprises: the mounting seat fixed on the ground, be arranged on one or more spring in described mounting seat, and be arranged on described spring, that described ladle body can be kept support
Wherein, due to the elastic force of described spring, described support is supported for can free inclination relative to described mounting seat.
7. the device of vacuum molten metal feed according to claim 4, wherein, described supporting mechanism comprises: be fixed on the mounting seat in floor surface, is arranged on the rubber slab in described mounting seat, and be arranged on described rubber slab, that described ladle body can be kept support
Wherein, due to the elastic force of described rubber slab, described support is supported for can free inclination relative to described mounting seat.
8. the device of the vacuum molten metal feed according to claim 6 or 7, wherein said mounting seat is made up of the elevating mechanism that can move up and down described support.
9. the device of the vacuum molten metal feed according to Claims 2 or 3, wherein said connector is formed by rubber spring and is arranged in multiple position so that equably around described motlten metal supply pipe.
10. the device of vacuum molten metal feed according to claim 3, wherein said seal has flexible corrugation tubular construction.
CN201180017437.0A 2010-04-02 2011-02-01 Device for vacuum supplying molten metal Active CN102834204B (en)

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WO2011125366A1 (en) 2011-10-13
JPWO2011125366A1 (en) 2013-07-08
JP5709847B2 (en) 2015-04-30

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