CN107127316A - The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls - Google Patents
The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls Download PDFInfo
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- CN107127316A CN107127316A CN201710478600.2A CN201710478600A CN107127316A CN 107127316 A CN107127316 A CN 107127316A CN 201710478600 A CN201710478600 A CN 201710478600A CN 107127316 A CN107127316 A CN 107127316A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
- B22D13/023—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/101—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls, including centrifuge system, quantitative pouring system, dust pelletizing system and full mold centrifugal casting mould, base is the steel plate of one piece of casting, centrifuge support roller assembly, gear wheel assembly, DC speed-regulating motor assembly are separately mounted on base, centrifuge support roller assembly is fastened on base by bolt, is connected by driving triangular belt with DC speed-regulating motor assembly；Gear wheel assembly is fastened on base in the bottom at pipe die center, and gear wheel rotating disk is set on gear wheel assembly；Bearing is installed at support roller two ends and is installed along with supporting-roller shaft bearing, bearing cap is arranged on supporting-roller shaft bearing.The flexibility of the invention cavityless casting, can be achieved one-mold multiple-member casting, and cavityless casting meets different length specification, different flange ratings, the demand of different flange positions through walls, improve shaping qualification rate, production efficiency is high, realizes and produces in enormous quantities, applied in centrifugal casting technique field.
Description
Technical field
The present invention relates to a kind of full mold centrifugal casting double plate flange straight tube in centrifugal casting technique field and flange through walls
The device and method of straight tube, more particularly to double plate flange and flange straight tube through walls centrifuge a type multiple castings per mould.
Background technology
At present, the waterline majority on domestic and international market for pressure-bearing uses centrifugal ductile cast iron pipes.Due to by double plate
Flange and flange through walls are stripped the limitation of difficulty in metal pattern, supply the double plate flanged pipe and flanged pipe through walls in market and have following
Several modes of production：
One, weld double plate flanged pipe.Weld the subject matter that double plate flanged pipe is present：（1）Weld seam differs with cast tube body material
Cause, " heterogeneous " weld strength is low.（2）Welding region stress concentration, cutting to be completely eliminated.（3）The flange at pipe two ends is in weldering
By manual assembly before connecing, scale error is big；In welding process be heated stress influence it is difficult to ensure that the concentricity of two flange holes and
The depth of parallelism of card.（4）It there is no the evaluation criterion of cast iron welding seam both at home and abroad at present, therefore welding quality user can not evaluate.Knot
By；Welded flange pipe is low because of its weld strength, and accident greatly and often occurs for fragility, though it is not popular with users, without preferably replacing
For product, so existing market occupation rate also makes number one.
Two, screwed flange pipe.As the term suggests flange and pipe are with being threadedly coupled.This connected mode axial tensile-strength
Still, but radial strength is low.Because socket threads deformation can caused by interface leak, heavy caliber, underground pipe can not use.Because by
The factor influence such as use condition is limited and sealing joint is unreliable, it is also not popular with users.
Three, sand mold block cast flanged pipe.Block cast flanged pipe is most at present to use ordinary sand casting and lost foam casting.Wherein
The subject matter that ordinary sand casting is present is that thickness of pipe wall is uneven, flexural deformation；The subject matter that lost foam casting is present
It is that slag inclusion, stomata is more, water pressure test water leakage ratio is big.In particular, caliber specification is smaller, and length is longer, exist on
The probability for stating defect is bigger, below DN200, and flanged pipe of the length more than 2 meters is difficult block cast shaping, even if shaping, qualification rate
Also it is very low, it is impossible to meet the market demand.How to evade the defect of above-mentioned several flanged pipes, centrifuge monoblock cast double plate flange straight tube
It is user's active demand.Therefore, the equipment for developing a kind of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls
And method is always new problem anxious to be resolved.
The content of the invention
It is an object of the invention to provide the equipment of a kind of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls
And method, the invention is that pre-manufactured foam mould is fitted into special pipe die, after potting resin sand on centrifuge
Moulding by casting, eps foam the modern designs of plastics use the cavityless casting method of phenolic sand molding, full mold are loaded into centrifugation pipe die, in centrifugation
Machine upper is molded；Double plate flanged pipe, the overall centrifugal casting of single double plate flanged pipe through walls flange tubing pipe fitting through walls are realized in the invention
Make, substitute the flanged pipe that welded flange pipe and other production technologies are manufactured, double plate flange and flange through walls and block cast of pipe shaft
Shaping, is fully achieved national GB/T13295-2013, international ISO2531；The requirement of 2009 standards, effectively reduces tubing safety wind
Danger；Completed using the double plate flange straight tube and flange straight tube cooling procedure through walls of full mold centrifugal casting in resin bonded sand mould,
Cementite and a large amount of pearlite will not be produced by metal pipe die chilling action, without annealing, save the energy, reduce into
This, with advantages such as energy-conserving and environment-protective；Simple cavityless casting uses gravity-assist pouring, and inherent quality can not compare with centrifugal casting；
And die spinning is used merely, to overcome double plate class pipe fitting to go out the difficulty of type, mould structure design is complicated, pipe die manufacture
Machining accuracy is high, and the cycle is long, and investment is big, and flexible without full mold centrifugal casting；Full mold centrifugal casting can realize casting more than a type, both
Cast out two and above same specification casting simultaneously in same pipe die, or two or more adjacent-specification casting.
The object of the present invention is achieved like this：A kind of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls
Equipment, including centrifuge system, quantitative pouring system, dust pelletizing system and full mold centrifugal casting mould, described centrifuge system
It is made up of base, centrifuge support roller assembly, bolt, DC speed-regulating motor assembly, driving triangular belt, gear wheel assembly, gear wheel rotating disk,
Base is the steel plate of one piece of casting, and centrifuge support roller assembly, gear wheel assembly, DC speed-regulating motor assembly are separately mounted to
On base, centrifuge support roller assembly is fastened on base by bolt, passes through driving triangular belt and DC speed-regulating motor assembly
Connection；Gear wheel assembly is fastened on base in the bottom at pipe die center, and gear wheel rotating disk is set on gear wheel assembly；The centrifugation
Machine support roller assembly is made up of supporting-roller shaft bearing, bearing, bearing cap, support roller, is installed bearing at support roller two ends and is installed along with support
On wheel bearing seat, bearing cap is arranged on supporting-roller shaft bearing；The quantitative pouring system by cast chute, pouring truck guide rail, pour
Buncher, pouring truck, fan-shaped include oil-lifting jar, fan-shaped bag, current-following inoculation device composition are walked by note garage, and pouring truck is arranged on and poured
Note on car guide rail, fan-shaped bag, fan-shaped include oil-lifting jar, cast chute, pouring truck walking buncher are installed on pouring truck,
Current-following inoculation device is set on pouring truck；The dust pelletizing system is led by movable dust removal cover, flexible cleaning shaft, dust excluding hood support
Rail, dust excluding hood movement support composition, install dust excluding hood movement support, dust excluding hood movement support is with moving on dust excluding hood supporting guide
Dynamic dust excluding hood connection, movable dust removal cover is connected with flexible cleaning shaft；The full mold centrifugal casting mould is by pressing plate, pressing plate wedge
Support ring, positioning steel tube skeleton composition are blocked up in iron, stifled pipe die end, pipe die rolling band, foam mould, pipe die, resin sand, upper end,
Pipe die two ends are installed pipe die end and blocked up, and block installation pressing plate, pressing plate drift during cast at pipe die end, are installed during moulding in pipe die upper end
Support ring, positioning steel cylinder skeleton are blocked up in upper end, have preassembled foam mould on positioning steel cylinder skeleton, in pipe die and foam
Potting resin sand between the modern designs of plastics, sets pipe die to roll band on pipe die；
A kind of described full mold centrifugal casting double plate flange straight tube and operation principle and the operation side of the equipment of flange straight tube through walls
Method is that described base is the steel plate of one piece of casting, centrifuge support roller assembly, gear wheel assembly, DC speed-regulating motor assembly
It is separately mounted on base, in addition to DC speed-regulating motor assembly is fixed, four groups of centrifuge support roller assemblies are straight by centrifugation pipe die
Footpath and length are arbitrarily adjusted on base, and support roller and the control of pipe die Gun Dai centers angle are between 110 ° ± 1 °；Described two gears
Wheel assembly is clamped in pipe die rolling band both sides along pipe die axis, and gear wheel rotating disk is brought into close contact with pipe die rolling band, prevents pipe die in level
Axial float when rotating at a high speed；The DC speed-regulating motor assembly drives support roller to rotate by driving triangular belt, and support roller drives pipe
Mould rotates, and is molded pipe fitting block cast under 38G-50G centrifugal actions；The quantitative pouring system is by the fan-shaped bag of sector bag
Upset and pouring truck drive what cast chute movement was completed, and sector bag upset any angle molten iron outflow is equivalent, pouring truck
Translational speed control casting section thickness is uniform, and pouring truck during cast on pouring truck guide rail will be poured into a mould before chute is sent into pipe die and poured a little
Position, a preceding position of pouring is blended into quantitative iron according to casting weight away from ㎜ -500 ㎜ of casting front end flange end face 300 in sector bag
Water, fan-shaped include oil-lifting jar lifts fan-shaped bag upset, and molten iron enters pipe die along cast chute, while pouring truck drives cast chute
Moved to pipe die tail end, when pouring position after pouring into a mould chute and being moved to, pouring truck is moved after stopping, now fan-shaped 90 ° of bag upset,
Casting process terminates；Pipe die wall is provided with exhaust hole, installs pipe die end at pipe die two ends and blocks up, is blocked at pipe die end provided with wedge
Hole, pipe die is disposed vertically during moulding, is easy to casting resin sand, and the pressing plate of pipe die bottom is locked in advance, sets pressing plate to have two
Purpose, one is positioning, it is ensured that positioning steel cylinder skeleton and foam mould and pipe die are concentric, and two be that closing resin sand is easy to consolidation,
Foam mould prepares to be, to pipe fitting pressure rating, specification and length requirement, a mold casting several to be selected, because of pipe die according to client
Maximum effective length is 5.8 meters, and single-piece or more than one piece may be selected in effective length, and it is fixed that ready foam mould is fixed on
On the steel cylinder skeleton of position, positioning steel cylinder skeleton has two effects, and one is positioning, and two be to support foam mould in potting resin sand
It is indeformable, positioning steel cylinder skeleton and foam mould are integrally inserted in the positioning hole of lower platen, installed in pipe die upper end
End stifled support ring, stationary positioned steel cylinder skeleton, while being easy to resin sand to fill, after resin sand end-of-fill, remove the stifled branch in upper end
Pushing out ring, changes pressing plate and locking pressure plate drift, while extracting positioning steel cylinder skeleton, prepares cast；On dust excluding hood supporting guide
Dust excluding hood movement support is installed, movable dust removal cover is connected and moved forward and backward with flexible cleaning shaft, sets Mobile type dust-collector mesh
Have two, one is to facilitate pipe die to lift, and two be effective to collect the cigarette that casting process is produced by foam mould, resin sand burning
Dirt；
A kind of described full mold centrifugal casting double plate flange straight tube and the method for flange straight tube through walls are：
（1）Mould prepares
A, according to user's request, by different size, different pressures grade prepares foam mould, selects a mold casting several, because
Pipe die maximum effective length is 5.8 meters, and single-piece or the overall centrifugal casting of more than one piece may be selected in effective length, and client needs two pieces
2.5 meters of double plate flanged pipes through walls, two parts are placed in a pipe die, and total length is no more than 5.8 meters, and foam mould is set
Two semicircles are calculated as, are easy to be wrapped on positioning steel cylinder skeleton, two semi-circular seam PUR adhering and sealings of foam mould,
It is fixed on the binding of special adhesive tape paper on positioning steel cylinder skeleton；
B, foam mould outer surface need the thick special coatings of showering 0.8-1.2 ㎜, prevent the surface scab of casting process medium casting,
Dope layer is dried 8 hours in 60 DEG C of drying rooms, after standby after coating drying；
C, according to cast gauge match pipe die, it is ensured that casting is not less than 30 ㎜, two ends ring flange end away from pipe die inwall minimum dimension
Identity distance pressing plate distance is more than 100 ㎜；Check whether pipe die steam vent is unobstructed, check that flange bolt fastening situation, inspection are blocked up in pipe die end
Look into pressing plate, upper end and block up whether support ring, pressing plate drift are intact, pressing plate, urgent pressing plate drift are installed after inspection is ready；
D, pipe die is vertically put on the plain jolter in mold pit, the foam mould drying and on positioning steel cylinder skeleton
Load the pressing plate positioning hole of pipe die, upper end is installed and blocks up support ring and locks, starts the operation of casting resin sand；
（2）Moulding
A, casting resin sand operating process are referred to as moulding, and resin sand is blended with flow mixer, and foam plastic is added from pipe die top
In the gap for expecting mould and pipe die inwall；
B, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc feature,
Both ensured that resin sand was closely knit, foam mould can not be damaged again；
C, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift, remove upper end and block up support ring, by unnecessary resin sand
Remove and strike off, top board is installed, locked with pressing plate drift；
D, extraction positioning steel cylinder skeleton after 20 minutes, foam mould are stayed in without taking out in resin sand, self-burning during cast
Fall；
E, pipe die integrally taken out from melt pit and be laid flat, in case centrifugal casting；
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting.
B, ready pipe die is put on the support roller of centrifuge, notices that pipe die rolling band will align support roller, while checking two
The ㎜ of individual gear wheel assembly and pipe die rolling band gap≤2；Movable dust removal cover is moved into pipe die end and blocks up position, starts dedusting fan；Start
Centrifuge DC speed-regulating motor slowly rotates by pipe die；Fan-shaped bag upset working condition is checked, current-following inoculation device work is checked
Situation, ready quantitative molten iron is blended into fan-shaped bag, 1350 DEG C -1380 DEG C of molten iron temperature；Start pouring truck, cast is slipped
Groove pours a position before being sent in pipe die, and a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300；Gradually heighten pipe die rotation
Rotary speed, until centrifugal force reaches 38G-50G；Start fan-shaped include oil-lifting jar, the upset of sector bag starts current-following inoculation dress simultaneously
Put, after molten iron falls into pipe die two to three seconds along cast chute, pouring truck is at the uniform velocity moved rearwards by, it is ensured that molten iron is evenly distributed on pipe
In mould, pour into a mould and stop movement after chute reaches after cast dead-centre position, dead-centre position is poured into a mould afterwards away from the ㎜ of casting flange end face 300,
Now fan-shaped 90 ° of bag upset simultaneously stops upset, closes current-following inoculation device, now molten iron has all been poured；Pipe die rotates at a high speed
Start to reduce pipe die rotating speed after 10-15 minutes；Different with wall thickness according to caliber, the time that pipe die rotates at a high speed is also different；But it is high
The centrifugal force of speed rotation can not be less than 38G；When casting temperature in pipe die is down to 400 DEG C, pipe die stops the rotation, pipe die and casting
Cooling station is moved on to continue to be cooled to room temperature；Open full mold centrifugal casting mould and take out casting；By resin sand feeding sand processing
It is secondary after device recycling to utilize；The residual sand of pipe die inwall is cleared up, prepares the cast of moulding next time；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；Machining；Processing
Flange seal waterline；
（4）Anti-corrosion and packaging；
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery；
The pipe fitting of described full mold centrifugal casting includes double plate straight tube, single double plate flanged pipe through walls flange tubing pipe fitting through walls, institute
It is monoblock cast to state double plate flange straight tube, single double plate flanged pipe through walls flange tubing pipe fitting through walls, and nominal diameter is DN80 millis
- DN2600 millimeters of rice, length is 5.8 meters.
The present invention is characterized by its structure, operation principle and casting method.
The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls compared with prior art, have
The flexibility of cavityless casting, can be achieved one-mold multiple-member casting, there is the advantage of centrifugal casting again.Centrifugal casting can effectively control body
Wall thickness, while meeting K grades, C grades of pipe pressure grades, cavityless casting meets different length specification, and different flange ratings are different
The demand of flange position through walls.Horizontal centrifugal is poured into a mould, and improves shaping qualification rate and a hydraulic pressure qualification rate, and shaping qualification rate is reachable
98%, a hydraulic pressure qualification rate, up to 95%, is 1-3 times of ordinary sand casting lost foam casting, and production efficiency is up to 5 times,
Realize and produce in enormous quantities, meet the market demand, flange and the flange through walls machine compared with welded flange of block cast centrifugal casting one
Tool performance doubles the above, and overall metallographic structure is completely the same, and quality is more reliable, and user is more satisfied, and centrifugal casting not only makes conjunction
Payment organization is finer and close, is more beneficial for a small amount of waste gas produced in environmental protection, cast, and dust can all be reclaimed, really realized green
The advantages of colour circle protects casting, will be widely used in centrifugal casting technique field.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the present invention is described in detail.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is Fig. 1 K to enlarged drawing.
Fig. 3 is the structural representation of pipe die part of the present invention.
Fig. 4 is the structural representation of clamp portion of the present invention.
Fig. 5 is Fig. 4 left view.
Fig. 6 is the structural representation that part is blocked up at pipe die end of the present invention.
Fig. 7 is Fig. 6 left view.
Fig. 8 is the structural representation of pressing plate drift part of the present invention.
Fig. 9 is Fig. 8 left view.
Figure 10 is the structural representation of the stifled support loop section in upper end of the present invention.
Figure 11 is Figure 10 left view.
Figure 12 is the structural representation of inventive die part.
Figure 13 is the structural representation that double plate flanged pipe product is cast with invention full mold centre spinning method.
Figure 14 is the structural representation that single-deck flanged pipe product through walls is cast with invention full mold centre spinning method.
Figure 15 is the structural representation that double plate flanged pipe product through walls is cast with invention full mold centre spinning method.
Figure 16 is that double structural representations for being inserted through wall flanged pipe product are cast with invention full mold centre spinning method.
Embodiment
Referring to the drawings, a kind of equipment of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls, including centrifuge
System 1, quantitative pouring system 2, dust pelletizing system 3 and full mold centrifugal casting mould 4, described centrifuge system 1 by base 1-1,
Centrifuge support roller assembly 1-2, bolt 1-3, DC speed-regulating motor assembly 1-4, driving triangular belt 1-5, gear wheel assembly 1-6, gear wheel
Rotating disk 1-7 is constituted, and base 1-1 is the steel plate of one piece of casting, by centrifuge support roller assembly 1-2, gear wheel assembly 1-6, direct current
Buncher assembly 1-4 is separately mounted on base 1-1, and centrifuge support roller assembly 1-2 is fastened on into base 1- by bolt 1-3
On 1, it is connected by driving triangular belt 1-5 with DC speed-regulating motor assembly 1-4；Gear wheel assembly 1-6 is under pipe die 4-6 centers
Portion, is fastened on base 1-1, and gear wheel rotating disk 1-7 is set on gear wheel assembly 1-6；The centrifuge support roller assembly 1-2 is by support roller
Bearing block 1-2-1, bearing 1-2-2, bearing cap 1-2-3, support roller 1-2-4 compositions, bearing 1-2-2 is installed at support roller 1-2-4 two ends
And be installed along with supporting-roller shaft bearing 1-2-1, bearing cap 1-2-3 is arranged on supporting-roller shaft bearing 1-2-1；The quantitative pouring
System 2 rises oil by cast chute 2-1, pouring truck guide rail 2-2, pouring truck walking buncher 2-3, pouring truck 2-4, fan-shaped include
Cylinder 2-5, fan-shaped bag 2-6, current-following inoculation device 2-7 compositions, pouring truck 2-4 is arranged on pouring truck guide rail 2-2, in pouring truck 2-
Fan-shaped bag 2-6, fan-shaped include oil-lifting jar 2-5, cast chute 2-1, pouring truck walking buncher 2-3 are installed, in pouring truck on 4
Current-following inoculation device 2-7 is set on 2-4；The dust pelletizing system 3 is by movable dust removal cover 3-1, flexible cleaning shaft 3-2, dust excluding hood
Supporting guide 3-3, dust excluding hood movement support 3-4 compositions, install dust excluding hood movement support 3-4 on dust excluding hood supporting guide 3-3,
Dust excluding hood movement support 3-4 is connected with movable dust removal cover 3-1, and movable dust removal cover 3-1 is connected with flexible cleaning shaft 3-2；It is described
Full mold centrifugal casting mould 4 by pressing plate 4-1, pressing plate drift 4-2, pipe die end block up 4-3, pipe die rolling band 4-4, foam mould 4-5,
Support ring 4-8, positioning steel tube skeleton 4-9 composition are blocked up in pipe die 4-6, resin sand 4-7, upper end, and pipe die end is installed at pipe die 4-6 two ends
Stifled 4-3, blocks up at pipe die end during cast and pressing plate 4-1, pressing plate drift 4-2 is installed on 4-3, installed during moulding in pipe die 4-6 upper ends
The stifled support ring 4-8 in end, positioning steel cylinder skeleton 4-9, have preassembled foam mould 4-5 on positioning steel cylinder skeleton 4-9,
Potting resin sand 4-7 between pipe die 4-6 and foam mould 4-5, band 4-4 is rolled setting pipe die on pipe die 4-6.
A kind of described full mold centrifugal casting double plate flange straight tube and operation principle and the behaviour of the equipment of flange straight tube through walls
It is that described base 1-1 is the steel plate of one piece of casting, centrifuge support roller assembly 1-2, gear wheel assembly 1-6, direct current as method
Buncher assembly 1-4 is separately mounted on base 1-1, in addition to DC speed-regulating motor assembly 1-4 is fixed, four groups of centrifuges
Support roller assembly 1-2 is arbitrarily adjusted by centrifuge tube mode diameter and length on base 1-1, support roller 1-2-4 and pipe die Gun Dai 4-4 centers
Angle is controlled between 110 ° ± 1 °；Described two gear wheel assembly 1-6 are clamped in pipe die rolling band 4-4 both sides along pipe die 4-6 axis,
Gear wheel rotating disk 1-7 rolls band 4-4 with pipe die and is brought into close contact, and prevents pipe die 4-6 axial floats when level rotates at a high speed；The direct current
Buncher assembly 1-4 drives support roller 1-2 to rotate by driving triangular belt 1-5, and support roller 1-2 drives pipe die 4-6 rotations, in 38G-
It is molded pipe fitting block cast under 50G centrifugal actions；The quantitative pouring system 2 is by the fan-shaped bag 2-6 upsets of sector bag and poured
Note car 2-4 and drive what the 2-1 movements of cast chute were completed, sector bag 2-6 upset any angle molten iron outflows are equivalent, pouring truck
2-4 translational speeds control casting section thickness is uniform, and pouring truck 2-4 during cast on pouring truck guide rail 2-2 will pour into a mould chute 2-1 feedings
A position is poured before pipe die 4-6, a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300, according to casting weight in fan
Quantitative molten iron is blended into shape bag 2-6, fan-shaped include oil-lifting jar 2-5 lifts fan-shaped bag 2-6 upsets, and molten iron enters along cast chute 2-1
Enter pipe die 4-6, while pouring truck 2-4 drives cast chute 2-1 to be moved to pipe die 4-6 tail ends, after cast chute 2-1 is moved to
When pouring position, pouring truck 2-4 is moved after stopping, and now fan-shaped bag 2-6 overturns 90 °, and casting process terminates；Set on pipe die 4-6 walls
There is exhaust hole, pipe die end is installed at pipe die 4-6 two ends and blocks up 4-3, is blocked up at pipe die end and wedge hole, pipe die 4-6 during moulding is provided with 4-3
It is disposed vertically, is easy to casting resin sand, the pressing plate 4-1 of pipe die 4-6 bottoms is locked in advance, sets pressing plate 4-1 there are two purposes,
One is positioning, it is ensured that positioning steel cylinder skeleton 4-9 and foam mould 4-5 and pipe die 4-6 is concentric, and two be that closing resin sand is easy to tightly
Real, foam mould 4-5 prepares to be, to pipe fitting pressure rating, specification and length requirement, to select a mold casting several according to client,
Because the maximum effective lengths of pipe die 4-6 are 5.8 meters, single-piece or more than one piece may be selected in effective length, by ready foamed plastics
Mould 4-5 is fixed on positioning steel cylinder skeleton 4-9, and positioning steel cylinder skeleton 4-9 has two effects, and one is positioning, and two be in filling tree
Support foam mould 4-5 indeformable during fat sand, positioning steel cylinder skeleton 4-9 and foam mould 4-5 is integrally inserted into bottom pressure
In plate 4-1 positioning hole, upper end is installed in pipe die 4-6 upper ends and blocks up support ring 4-8, stationary positioned steel cylinder skeleton 4-9, is easy to simultaneously
Resin sand is filled, after resin sand end-of-fill, is removed upper end and is blocked up support ring 4-8, changes pressing plate 4-1 and locking pressure plate drift 4-2,
Positioning steel cylinder skeleton 4-9 is extracted simultaneously, prepares cast；Dust excluding hood movement support 3-4 is installed on dust excluding hood supporting guide 3-3,
Movable dust removal cover 3-1 is connected and moved forward and backward with flexible cleaning shaft 3-2, sets Mobile type dust-collector purpose to have two, one is
Pipe die 4-6 is facilitated to lift, two be the flue dust that effective collection casting process is produced by foam mould 4-5, resin sand burning.
A kind of described full mold centrifugal casting double plate flange straight tube and the method for flange straight tube through walls are：
（1）Mould prepares
A, according to user's request, by different size, different pressures grade prepares foam mould 4-5, selects a mold casting several,
Because the maximum effective lengths of pipe die 4-6 are 5.8 meters, single-piece or the overall centrifugal casting of more than one piece, Ke Huxu may be selected in effective length
2.5 meters of double plate flanged pipes through walls of two pieces are wanted, two parts are placed in a pipe die 4-6, total length is no more than 5.8 meters, bubble
Foam the modern designs of plastics 4-5 is designed as two semicircles, is easy to be wrapped on positioning steel cylinder skeleton 4-9, two semicircles of foam mould 4-5 connect
Seam uses PUR adhering and sealing, is fixed on the binding of special adhesive tape paper on positioning steel cylinder skeleton 4-9；
B, foam mould 4-5 outer surfaces need the thick special coatings of showering 0.8-1.2 ㎜, prevent casting process medium casting surface from gluing
Sand, dope layer is dried 8 hours in 60 DEG C of drying rooms, after standby after coating drying；
C, pipe die 4-6 matched according to cast gauge, it is ensured that casting is not less than 30 ㎜, two hold-carryings away from pipe die 4-6 inwall minimum dimensions
Blue side surface is more than 100 ㎜ away from pressing plate distance；Check whether pipe die 4-6 steam vents are unobstructed, check that flange bolt is blocked up at pipe die 4-6 ends
Fastening situation, checks that pressing plate 4-1, upper end block up whether support ring 4-8, pressing plate drift 4-2 are intact, pressing plate 4- is installed after inspection is ready
1st, urgent pressing plate drift 4-2；
D, pipe die 4-6 is vertically put on the plain jolter in mold pit, the foam drying and on positioning steel cylinder skeleton 4-9
The modern designs of plastics 4-5 loads pipe die 4-6 pressing plate 4-1 positioning holes, installs upper end and blocks up support ring 4-8 and lock, starts casting resin sand
Operation；
（2）Moulding
A, casting resin sand operating process are referred to as moulding, and resin sand is blended with flow mixer, and foam is added from pipe die 4-6 tops
In the gap of the modern designs of plastics 4-5 and pipe die 4-6 inwalls；
B, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc feature,
Both ensured that resin sand was closely knit, foam mould 4-5 can not be damaged again；
C, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift 4-2, remove upper end and block up support ring 4-8, will be unnecessary
Resin sand removes and struck off, and installs top board 4-1, is locked with pressing plate drift 4-2；
D, extraction positioning steel cylinder skeleton 4-9 after 20 minutes, foam mould 4-5 are stayed in without taking out in resin sand, during cast certainly
Row is burnt；
E, pipe die 4-6 integrally taken out from melt pit and be laid flat, in case centrifugal casting；
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting.
B, ready pipe die 4-6 is put on the support roller 1-2 of centrifuge, notices that pipe die rolling band 4-4 will align support roller 1-
2, while checking that two gear wheel assembly 1-6 and pipe die roll the ㎜ of band 4-4 gaps≤2；Movable dust removal cover 3-1 is moved into pipe die end and blocks up 4-
3 positions, start dedusting fan；Starting centrifuge DC speed-regulating motor 1-4 allows pipe die 4-6 slowly to rotate；Check that fan-shaped bag 2-6 is turned over
Turn working condition, check current-following inoculation device 2-7 working conditions, ready quantitative molten iron is blended into fan-shaped bag 2-6, molten iron
1350 DEG C -1380 DEG C of temperature；Start pouring truck 2-4, a position is poured before cast chute 2-1 is sent in pipe die 4-6, it is preceding to pour a position
Put away from ㎜ -500 ㎜ of casting front end flange end face 300；Pipe die 4-6 rotary speeies are gradually heightened, until centrifugal force reaches 38G-
50G；Start fan-shaped include oil-lifting jar 2-5, sector bag 2-6 upsets start current-following inoculation device 2-7 simultaneously, when molten iron is slipped along cast
Groove 2-1 fell into pipe die 4-6 after bis- to three seconds, and pouring truck 2-4 is at the uniform velocity moved rearwards by, it is ensured that molten iron is evenly distributed in pipe die, is poured
Stop movement after note chute 2-1 reaches after cast dead-centre position, rear cast dead-centre position is away from the ㎜ of casting flange end face 300, now
Sector bag 2-6 overturns 90 ° and stops upset, closes current-following inoculation device 2-7, now molten iron has all been poured；Pipe die revolves at a high speed
Turn to start to reduce pipe die rotating speed after 10-15 minutes；Different with wall thickness according to caliber, the time that pipe die 4-6 rotates at a high speed is also different；
But the centrifugal force of rotation can not be less than 38G at a high speed；When casting temperature is down to 400 DEG C in pipe die 4-6, pipe die 4-6 stops the rotation,
Pipe die 4-6 moves on to cooling station with casting to be continued to be cooled to room temperature；Open full mold centrifugal casting mould 4 and take out casting；Will tree
It is secondary after the feeding sand preparation plant recycling of fat sand to utilize；The residual sand of pipe die 4-6 inwalls is cleared up, prepares the cast of moulding next time；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；Machining；Processing
Flange seal waterline；
（4）Anti-corrosion and packaging；
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery.
The pipe fitting of described full mold centrifugal casting includes double plate straight tube, single double plate flanged pipe through walls flange tubing pipe through walls
Part, the double plate flange straight tube, single double plate flanged pipe through walls flange tubing pipe fitting through walls are monoblock cast, and nominal diameter is
DN80 millimeters-DN2600 millimeters, length is 5.8 meters.
Embodiment one
It is with full mold centrifugation centrifugal casting PN16,1.8 meters of length, DN800 double plate flanges straight tube, 3 type centre spinning methods：
（1）Model preparation
A, according to user's request, prepare DN800, PN16 foam moulds 4-5.Foam mould 4-5 is EPS beads by sending out in advance
Bubble, the thermoplastic shaping of full mold centrifugal casting mould 4 is passed through in Special forming machine.Straight-tube portion and flange are a point mold formings.Foam
The characteristics of the modern designs of plastics 4-5 is can arbitrarily to cut and assembled bonding, and PN16 flanges and straight tube are spliced into two and half by 1.8 meters of length
Circle, and three are manufactured respectively；
B, by ready 3 foam mould 4-5 be arranged on positioning steel tube skeleton 4-9 on, 3 end face of flange are noted during assembling
Interval is not less than 150 ㎜, and two semicircular seam is bonded with PUR, the ㎜ thickness of showering 0.8 after fixing is bundled with special adhesive tape paper special
Coating, is put into drying chamber drying, temperature 60 C, 8 hours time；
C, pipe die 4-6 prepare；The ㎜ of PN10, DN800 flange outer diameter 1015, it is considered to flange outer diameter and pipe die 4-6 inwall minimum clearances
Not less than 30 ㎜, it is thus determined that pipe die 4-6 internal diameters are not less than 1075 ㎜, it is considered to which end face of flange is away from the ㎜ of pressing plate minimum clearance 100, really
Fixed tube mould 4-6 effective lengths are not less than 4 meters；
D, ready pipe die 4-6 is put on centrifuge, adjustment support roller 1-2-4 and pipe die Gun Dai 4-4 centers angle are 110 °,
Two gear wheel assembly 1-6 of adjustment and pipe die roll poured before the ㎜ of band 4-4 gaps≤2, adjustment cast chute 2-1 a little with rear dead-centre position,
The fan-shaped bag 2-6 of adjustment turns over speed packet, adjusts current-following inoculation device 2-7 given amounts, is linked by the technological parameter airport logistic park after adjustment
Test run, after whole is up to standard, removes pipe die 4-6 to moulding station；
（2）Moulding
A, inspection flow mixer working condition, confirm molding sand, furane resins, curing agent is ready for ready.Check microseism moulding
Machine amplitude meets the requirements with frequency；
B, installation pipe die 4-6 lower ends are blocked up pressing plate 4-1 and locked, and pipe die 4-6 is vertically put on the plain jolter in mold pit,
Drying and the pressing plate 4-1 positioning holes of the foam mould loading pipe die 4-6 on positioning steel tube skeleton 4-9, install the stifled branch in upper end
Pushing out ring 4-8 is simultaneously locked, and starts the operation of casting resin sand.
C, casting resin sand operating process are referred to as moulding.Resin sand is blended with flow mixer, by resin sand from pipe die 4-6
Top is continuously added in the gap of foam mould 4-5 and pipe die 4-6 inwalls.
D, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc
Feature, had both ensured that resin sand was closely knit, foam mould 4-5 can not be damaged again.
E, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift 4-2, remove upper end and block up support ring 4-8, will be many
Remaining resin sand removes and struck off, and installs pressing plate 4-1, is locked with pressing plate drift 4-2.
F, extraction positioning steel tube skeleton 4-9 after 20 minutes, foam mould 4-5 are stayed in without taking out in resin sand, cast
When self-burning fall.
G, pipe die 4-6 integrally taken out from melt pit and be laid flat, in case centrifugal casting.
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting.
B, ready pipe die 4-6 is put on the support roller 1-2-4 of centrifuge, notices that pipe die rolling band 4-4 will align support roller
1-2-4, while checking that two gear wheel assembly 1-6 and pipe die roll the ㎜ of band 4-4 gaps≤2；Movable dust removal cover 3-1 is moved into pipe die end
Stifled 4-3 positions, start dedusting fan；Starting centrifuge DC speed-regulating motor 1-4 allows pipe die 4-6 slowly to rotate；Check fan-shaped bag
2-6 overturns working condition, checks current-following inoculation device 2-7 working conditions, and ready quantitative molten iron is blended into fan-shaped bag 2-6
In, 1350 DEG C -1380 DEG C of molten iron temperature；Start pouring truck 2-4, a position poured before cast chute 2-1 is sent in pipe die 4-6,
Before pour a position away from ㎜ -500 ㎜ of casting front end flange end face 300；Pipe die 4-6 rotary speeies are gradually heightened, until centrifugal force reaches
To 38G-50G；Start fan-shaped include oil-lifting jar 2-5, sector bag 2-6 upsets start current-following inoculation device 2-7 simultaneously, when molten iron edge
Cast chute 2-1 fell into pipe die 4-6 after bis- to three seconds, and pouring truck 2-4 is at the uniform velocity moved rearwards by, it is ensured that molten iron is evenly distributed on pipe die
In 4-6, stop movement after cast chute 2-1 reaches after cast dead-centre position, rear cast dead-centre position is away from casting flange end face 300
㎜, now fan-shaped 90 ° of bag 2-6 upsets simultaneously stop upset, close current-following inoculation device 2-7, now molten iron has all been poured；Pipe die
Rotation starts to reduce pipe die 4-6 rotating speeds 4-6 after 10-15 minutes at a high speed；Different with wall thickness according to caliber, pipe die 4-6 rotates at a high speed
Time it is also different；But the centrifugal force of rotation can not be less than 38G at a high speed；When casting temperature is down to 400 DEG C in pipe die 4-6, pipe
Mould 4-6 is stopped the rotation, and pipe die 4-6 moves on to cooling station with casting to be continued to be cooled to room temperature；Open full mold centrifugal casting mould 4 simultaneously
Take out casting；Utilized secondary after resin sand feeding sand preparation plant recycling；The residual sand of pipe die 4-6 inwalls is cleared up, under preparation
Moulding is poured into a mould；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；Machining；Processing
Flange seal waterline；
（4）Anti-corrosion and packaging
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery.
Embodiment two
PN16, DN200 single-deck flange straight tube through walls, length are cast with full mold centre spinning method for 4 meters, flange distance wherein through walls
Flange seal end face length is that 2 meters of centre spinning methods are：
（1）Model preparation
A, according to user's request, prepare DN200, PN16 foam moulds 4-5.Foam mould 4-5 is EPS beads by sending out in advance
Bubble, the thermoplastic shaping of full mold centrifugal casting mould 4 is passed through in Special forming machine.Straight-tube portion and flange and flange through walls be point mould into
Type.The characteristics of foam mould 4-5 is can arbitrarily to cut and assembled bonding, and PN16 flanges and straight tube are spliced by 4 meters of length
Into two semicircles, flange through walls is fixed at 2 meters away from end face of flange；
B, ready foam mould 4-5 is arranged on positioning steel tube skeleton 4-9, PUR adhesive joins used, with special
The thick special coatings of the ㎜ of showering 0.8 after adhesive tape binding is fixed, are put into drying chamber drying, temperature 60 C, 8 hours time；
C, pipe die 4-6 prepare；The ㎜ of PN16, DN200 flange outer diameter 340, it is considered to which flange outer diameter and pipe die 4-6 inwalls minimum clearance are not
Less than 30 ㎜, it is thus determined that pipe die 4-6 internal diameters are not less than 400 ㎜, it is considered to end face of flange away from the ㎜ of pressing plate minimum clearance 100, it is determined that
Pipe die 4-6 effective lengths are not less than 4.2 meters；
D, ready pipe die 4-6 is put on centrifuge, adjustment support roller 1-2-4 and pipe die Gun Dai 4-4 centers angle are 110 °,
Two gear wheel assembly 1-6 of adjustment and pipe die are rolled to be poured a little and rear dead-centre position before the ㎜ of band 4-4 gaps≤2, adjustment 2-1, adjustment sector
Bag 2-6 turns over speed packet, adjusts current-following inoculation device 2-7 given amounts, by the technological parameter airport logistic park linkage trial run after adjustment, whole
After up to standard, pipe die 4-6 is removed to moulding station；
（2）Moulding
A, inspection flow mixer working condition, confirm molding sand, furane resins, curing agent is ready for ready.Check microseism moulding
Machine amplitude meets the requirements with frequency；
B, the pressing plate 4-1 for installing pipe die 4-6 are simultaneously locked, and pipe die 4-6 are vertically put on the plain jolter in mold pit, drying
And the foam mould 4-5 on positioning steel tube skeleton 4-9 loads pipe die 4-6 pressing plate 4-1 positioning holes, notes flanged disk
One end is placed on bottom, is placed on top without one end of ring flange, it is therefore an objective to facilitate resin sand to fill.Upper end is installed and blocks up support ring
And lock, start the operation of casting resin sand.
C, casting resin sand operating process are referred to as moulding.Resin sand is blended with flow mixer, by resin sand from pipe die 4-6
Top is continuously added in the gap of foam mould 4-5 and pipe die 4-6 inwalls.
D, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc
Feature, had both ensured that resin sand was closely knit, foam mould 4-5 can not be damaged again.
E, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift 4-2, remove upper end and block up support ring 4-8, will be many
Remaining resin sand removes and struck off, and installs top board 4-1, is locked with pressing plate drift 4-2.
F, extraction positioning steel tube skeleton 4-9 after 20 minutes, foam mould 4-5 are stayed in without taking out in resin sand, cast
When self-burning fall.
G, pipe die 4-6 integrally taken out from melt pit and be laid flat, in case centrifugal casting.
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting.
B, ready pipe die 4-6 is put on the support roller 1-2-4 of centrifuge, notices that pipe die rolling band 4-4 will align support roller
1-2-4, while checking that two gear wheel assembly 1-6 of adjustment and pipe die roll the ㎜ of band 4-4 gaps≤2；Movable dust removal cover 3-1 is moved into pipe
4-3 positions are blocked up at mould end, start dedusting fan；Starting centrifuge DC speed-regulating motor 1-4 allows pipe die 4-6 slowly to rotate；Check fan
Shape bag 2-6 overturns working condition, checks current-following inoculation device 2-7 working conditions, and ready quantitative molten iron is blended into fan-shaped bag
In 2-6,1350 DEG C -1380 DEG C of molten iron temperature；Start pouring truck 2-4, a position is poured before cast chute 2-1 is sent in pipe die 4-6
Put, a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300；Pipe die 4-6 rotary speeies are gradually heightened, until centrifugal force
Reach 38G-50G；Start fan-shaped include oil-lifting jar 2-5, sector bag 2-6 upsets start current-following inoculation device 2-7, work as molten iron simultaneously
Pipe die 4-6 is fallen into after bis- to three seconds along cast chute 2-1, pouring truck 5（2-4）At the uniform velocity it is moved rearwards by, it is ensured that molten iron is uniformly distributed
In pipe die 4-6, stop movement after cast chute 2-1 reaches after cast dead-centre position, rear cast dead-centre position is away from casting flange
The ㎜ of end face 300, now fan-shaped 90 ° of bag 2-6 upsets simultaneously stop upset, close current-following inoculation device 2-7, now molten iron is all poured
It is complete；Rotation starts to reduce pipe die 4-6 rotating speeds pipe die 4-6 after 10-15 minutes at a high speed；Different with wall thickness according to caliber, pipe die 4-6 is high
The time of speed rotation is also different；But the centrifugal force of rotation can not be less than 38G at a high speed；Treat that casting temperature is down to 400 DEG C in pipe die 4-6
When, pipe die 4-6 is stopped the rotation, and pipe die 4-6 moves on to cooling station with casting to be continued to be cooled to room temperature；Open full mold centrifugal casting modeling
Tool 4 simultaneously takes out casting；Utilized secondary after resin sand feeding sand preparation plant recycling；The residual sand of pipe die 4-6 inwalls is cleared up, it is accurate
The standby cast of moulding next time；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；
Machining；Process flange seal waterline；
（4）Anti-corrosion and packaging；
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery.
Embodiment three
With full mold centrifugation centrifugal casting PN10,2.5 meters of length, specification be respectively DN350, DN400 double plate flange straight tube, 2 one
Type centre spinning method is：
（1）Model preparation
A, according to user's request, prepare DN350, PN10,2.5 meters of length and DN400, PN10,2.5 meters of foam mould 4- of length
5 one.Foam mould 4-5 be EPS beads by prefoam, pass through the thermoplastic of full mold centrifugal casting mould 4 in Special forming machine
Shaping.Straight-tube portion and flange are a point mold formings.The characteristics of foam mould 4-5 is can arbitrarily to cut and assembled bonding, will
PN10 flanges and straight tube are spliced into two semicircles by 2.5 meters of length, and manufacture 2 respectively；
B, by ready 2 foam mould 4-5 be arranged on positioning steel tube skeleton 4-9 on, 2 end face of flange are noted during assembling
Interval is not less than 150 ㎜, and two semicircular seam is bonded with PUR, the ㎜ thickness of showering 0.8 after fixing is bundled with special adhesive tape paper special
Coating, is put into drying chamber drying, temperature 60 C, 8 hours time；
C, pipe die 4-6 prepare；The ㎜ of PN10, DN400 flange outer diameter 565, it is considered to which flange outer diameter and pipe die 4-6 inwalls minimum clearance are not
Less than 30 ㎜, it is thus determined that pipe die 4-6）Internal diameter be not less than 620 ㎜, it is considered to end face of flange away from the ㎜ of pressing plate minimum clearance 100, it is determined that
Pipe die 13（4-6）Effective length is not less than 5.2 meters；
D, by ready pipe die 13（4-6）It is put on centrifuge, adjusts support roller 22（1-2-4）Band 11 is rolled with pipe die（4-4）In
Heart angle is 110 °, adjusts two gear wheel assemblies 26（1-6）Band 11 is rolled with pipe die（4-4）The ㎜ of gap≤2, adjustment cast chute 2
（2-1）Before pour a little and rear dead-centre position, the fan-shaped bag 7 of adjustment（2-6）Speed packet is turned over, current-following inoculation device 30 is adjusted（2-7）Provide
Amount, by the technological parameter airport logistic park linkage trial run after adjustment, after whole is up to standard, removes pipe die 13（4-6）To moulding station；
（2）Moulding
A, inspection flow mixer working condition, confirm molding sand, furane resins, curing agent is ready for ready.Check microseism moulding
Machine amplitude meets the requirements with frequency；
B, installation pipe die 13（4-6）Pressing plate 8（4-1）And lock, by pipe die 13（4-6）Pipe die is vertically put into mold pit
Plain jolter on, drying and in positioning steel tube skeleton 28（4-9）On foam mould 12（4-5）Load pipe die 13（4-6）
Pressing plate 8（4-1）Positioning hole, it is considered to which resin sand filling is convenient, notes DN400 parts in pipe die 13（4-6）Bottom, DN350 parts exist
Top, installs upper end and blocks up support ring 27（4-8）And lock, start the operation of casting resin sand.
C, casting resin sand operating process are referred to as moulding.Resin sand is blended with flow mixer, by resin sand from pipe die 13
（4-6）Top is continuously added to foam mould 12（4-5）With pipe die 13（4-6）In the gap of inwall.
D, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc
Feature, had both ensured that resin sand was closely knit, foam mould 12 can not be damaged again（4-5）.
E, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift 9（4-2）, remove upper end and block up support ring 27（4-
8）, unnecessary resin sand is removed and struck off, pressing plate 8 is installed（4-1）, with pressing plate drift 9（4-2）Locking.
F, extraction positioning steel tube skeleton 28 after 20 minutes（4-9）, foam mould 12（4-5）Stay in resin sand without taking
Go out, self-burning falls during cast.
G, by pipe die 13（4-6）Overall taken out from melt pit is laid flat, in case centrifugal casting.
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting.
B, by ready pipe die 13（4-6）It is put into the support roller 22 of centrifuge（1-2-4）On, notice that pipe die rolls band 11（4-
4）Align 22（1-2-4）, while checking two gear wheels and rolling band gap≤2 ㎜；Dust excluding hood is moved into pipe die end stifled 10（4-3）Position
Put, start dedusting fan；Start centrifuge DC speed-regulating motor 24（1-4）Allow pipe die 13（4-6）Slow rotation；Check fan-shaped bag
7（2-6）Working condition is overturn, current-following inoculation device 30 is checked（2-7）Working condition, sector is blended into by ready quantitative molten iron
Bag 7（2-6）In, 1350 DEG C -1380 DEG C of molten iron temperature；Start pouring truck 5（2-4）, chute 2 will be poured into a mould（2-1）It is sent to pipe die 13
（4-6）A position is poured before interior, a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300；Gradually heighten pipe die 13（4-6）
Rotary speed, until centrifugal force reaches 38G-50G；Start fan-shaped include oil-lifting jar 6（2-5）, sector bag 7（2-6）Upset is simultaneously
Start current-following inoculation device 30（2-7）, when molten iron edge cast chute 2（2-1）Fall into pipe die 13（4-6）After 2-3 seconds, pouring truck 5
（2-4）At the uniform velocity it is moved rearwards by, it is ensured that molten iron is evenly distributed on pipe die 13（4-6）It is interior, pour into a mould chute 2（2-1）Cast stops after reaching
Stopping movement behind point position, rear cast dead-centre position is now fan-shaped to wrap 7 away from the ㎜ of casting flange end face 300（2-6）90 ° of upset is simultaneously
Stop upset, close current-following inoculation device 30（2-7）, now molten iron all poured；Pipe die 13（4-6）10-15 is rotated at a high speed
Start to reduce pipe die rotating speed after minute；It is different with wall thickness according to caliber, pipe die 13（4-6）The time of rotation is also different at a high speed；But
The centrifugal force of rotation can not be less than 38G at a high speed；Treat pipe die 13（4-6）When interior casting temperature is down to 400 DEG C, pipe die 13（4-6）Stop
Spin-ended turn, pipe die 13（4-6）Cooling station is moved on to casting to continue to be cooled to room temperature；Open full mold centrifugal casting mould 4 and take
Go out casting；Utilized secondary after resin sand feeding sand preparation plant recycling；Clear up pipe die 13（4-6）The residual sand of inwall, prepares
Moulding next time is poured into a mould；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；
Machining；Process flange seal waterline；
（4）Anti-corrosion and packaging；
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery.
H represents to be connected with deduster in Fig. 1；B represents steam vent in Fig. 3.
Claims (4)
1. the equipment of a kind of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls, including centrifuge system, quantitatively pour
Injection system, dust pelletizing system and full mold centrifugal casting mould, it is characterised in that：Described centrifuge system is by base, centrifuge support
Wheel assembly, bolt, DC speed-regulating motor assembly, driving triangular belt, gear wheel assembly, gear wheel rotating disk composition, base is that a block casting is made
The steel plate of shaping, centrifuge support roller assembly, gear wheel assembly, DC speed-regulating motor assembly are separately mounted on base, pass through spiral shell
Centrifuge support roller assembly is fastened on base by bolt, is connected by driving triangular belt with DC speed-regulating motor assembly；Gear wheel assembly
Bottom at pipe die center, is fastened on base, and gear wheel rotating disk is set on gear wheel assembly；The centrifuge support roller assembly is by holding in the palm
Wheel bearing seat, bearing, bearing cap, support roller composition, bearing is installed at support roller two ends and is installed along with supporting-roller shaft bearing, by axle
Hold lid and be arranged on supporting-roller shaft bearing；The quantitative pouring system is by cast chute, pouring truck guide rail, pouring truck walking speed governing electricity
Machine, pouring truck, fan-shaped include oil-lifting jar, fan-shaped bag, current-following inoculation device composition, pouring truck are arranged on pouring truck guide rail,
Fan-shaped bag, fan-shaped include oil-lifting jar, cast chute, pouring truck walking buncher are installed on pouring truck, set on pouring truck
Current-following inoculation device；The dust pelletizing system is moved by movable dust removal cover, flexible cleaning shaft, dust excluding hood supporting guide, dust excluding hood
Support is constituted, and dust excluding hood movement support is installed on dust excluding hood supporting guide, and dust excluding hood movement support is connected with movable dust removal cover,
Movable dust removal cover is connected with flexible cleaning shaft；The full mold centrifugal casting mould is by pressing plate, pressing plate drift, pipe die end is stifled, manage
Support ring, positioning steel tube skeleton composition are blocked up in mould rolling band, foam mould, pipe die, resin sand, upper end, in pipe die two ends installing pipe
Mould end is blocked up, and installation pressing plate, pressing plate drift are blocked at pipe die end during cast, installed during moulding in pipe die upper end upper end block up support ring,
Steel cylinder skeleton is positioned, has preassembled foam mould on positioning steel cylinder skeleton, is filled out between pipe die and foam mould
Resin sand is filled, sets pipe die to roll band on pipe die.
2. the equipment of a kind of full mold centrifugal casting double plate flange straight tube according to claim 1 and flange straight tube through walls, its
It is characterised by：A kind of described full mold centrifugal casting double plate flange straight tube and operation principle and the behaviour of the equipment of flange straight tube through walls
It is that described base is the steel plate of one piece of casting, centrifuge support roller assembly, gear wheel assembly, DC speed-regulating motor as method
Assembly is separately mounted on base, in addition to DC speed-regulating motor assembly is fixed, and four groups of centrifuge support roller assemblies press centrifuge tube
Mode diameter and length are arbitrarily adjusted on base, and support roller and the control of pipe die Gun Dai centers angle are between 110 ° ± 1 °；Described two
Individual gear wheel assembly is clamped in pipe die rolling band both sides along pipe die axis, and gear wheel rotating disk is brought into close contact with pipe die rolling band, prevents pipe die from existing
Axial float when level rotates at a high speed；The DC speed-regulating motor assembly drives support roller to rotate by driving triangular belt, support roller band
Dynamic pipe die rotation, is molded pipe fitting block cast under 38G-50G centrifugal actions；The quantitative pouring system is fanned by sector bag
Shape bag is overturn and pouring truck drives what cast chute movement was completed, and sector bag upset any angle molten iron outflow is equivalent, is poured
Note car translational speed control casting section thickness uniformly, pouring truck during cast on pouring truck guide rail is sent into chute is poured into a mould before pipe die
A position is poured, a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300, and it is fixed to be blended into according to casting weight in sector bag
Molten iron is measured, fan-shaped include oil-lifting jar lifts fan-shaped bag upset, and molten iron enters pipe die along cast chute, while pouring truck drives cast
Chute is moved to pipe die tail end, and when pouring position after pouring into a mould chute and being moved to, pouring truck is moved after stopping, now fan-shaped bag upset
90 °, casting process terminates；Pipe die wall is provided with exhaust hole, installs pipe die end at pipe die two ends and blocks up, blocks and be provided with pipe die end
Wedge hole, pipe die is disposed vertically during moulding, is easy to casting resin sand, and the pressing plate of pipe die bottom is locked in advance, sets pressing plate to have two
Individual purpose, one is positioning, it is ensured that positioning steel cylinder skeleton and foam mould and pipe die are concentric, and two be that closing resin sand is easy to tightly
Real, foam mould prepares to be, to pipe fitting pressure rating, specification and length requirement, to select a mold casting several according to client, because
Pipe die maximum effective length is 5.8 meters, and single-piece or more than one piece may be selected in effective length, ready foam mould is fixed
On positioning steel cylinder skeleton, positioning steel cylinder skeleton has two effects, and one is positioning, and two be to support foam plastic in potting resin sand
Expect modular invariance shape, positioning steel cylinder skeleton and foam mould are integrally inserted in the positioning hole of lower platen, in pipe die upper end peace
End stifled support ring, stationary positioned steel cylinder skeleton are loaded onto, while being easy to resin sand to fill, after resin sand end-of-fill, upper end is removed
Stifled support ring, changes pressing plate and locking pressure plate drift, while extracting positioning steel cylinder skeleton, prepares cast；Led in dust excluding hood support
Dust excluding hood movement support is installed, movable dust removal cover is connected and moved forward and backward with flexible cleaning shaft, sets movable dust removal to fill on rail
Putting purpose has two, and one is to facilitate pipe die to lift, and two be effectively to collect casting process because of foam mould, and resin sand burning is produced
Flue dust.
3. the method for a kind of full mold centrifugal casting double plate flange straight tube according to claim 1 and flange straight tube through walls, its
It is characterised by：A kind of described full mold centrifugal casting double plate flange straight tube and the method for flange straight tube through walls are：
（1）Mould prepares
A, according to user's request, by different size, different pressures grade prepares foam mould, selects a mold casting several, because
Pipe die maximum effective length is 5.8 meters, and single-piece or the overall centrifugal casting of more than one piece may be selected in effective length, and client needs two pieces
2.5 meters of double plate flanged pipes through walls, two parts are placed in a pipe die, and total length is no more than 5.8 meters, and foam mould is set
Two semicircles are calculated as, are easy to be wrapped on positioning steel cylinder skeleton, two semi-circular seam PUR adhering and sealings of foam mould,
It is fixed on the binding of special adhesive tape paper on positioning steel cylinder skeleton；
B, foam mould outer surface need the thick special coatings of showering 0.8-1.2 ㎜, prevent the surface scab of casting process medium casting,
Dope layer is dried 8 hours in 60 DEG C of drying rooms, after standby after coating drying；
C, according to cast gauge match pipe die, it is ensured that casting is not less than 30 ㎜, two ends ring flange end away from pipe die inwall minimum dimension
Identity distance pressing plate distance is more than 100 ㎜；Check whether pipe die steam vent is unobstructed, check that flange bolt fastening situation, inspection are blocked up in pipe die end
Look into pressing plate, upper end and block up whether support ring, pressing plate drift are intact, pressing plate, urgent pressing plate drift are installed after inspection is ready；
D, pipe die is vertically put on the plain jolter in mold pit, the foam mould drying and on positioning steel cylinder skeleton
Load the pressing plate positioning hole of pipe die, upper end is installed and blocks up support ring and locks, starts the operation of casting resin sand；
（2）Moulding
A, casting resin sand operating process are referred to as moulding, and resin sand is blended with flow mixer, and foam plastic is added from pipe die top
In the gap for expecting mould and pipe die inwall；
B, fill up after resin sand, start plain jolter to resin sand ram-jolt, it is desirable to which plain jolter must is fulfilled for high-frequency short arc feature,
Both ensured that resin sand was closely knit, foam mould can not be damaged again；
C, the operation of casting resin sand terminate and after ram-jolt, unclamp pressing plate drift, remove upper end and block up support ring, by unnecessary resin sand
Remove and strike off, top board is installed, locked with pressing plate drift；
D, extraction positioning steel cylinder skeleton after 20 minutes, foam mould are stayed in without taking out in resin sand, self-burning during cast
Fall；
E, pipe die integrally taken out from melt pit and be laid flat, in case centrifugal casting；
（3）Centrifugal casting
A, resin sand have from hard feature, and general 20 minutes i.e. curable, reaches suitable strength within 6 hours or so, when resin sand reaches
To after suitable strength, you can carry out centrifugal casting；
B, ready pipe die is put on the support roller of centrifuge, notices that pipe die rolling band will align support roller, while checking two gears
The ㎜ of wheel assembly and pipe die rolling band gap≤2；Movable dust removal cover is moved into pipe die end and blocks up position, starts dedusting fan；Start centrifugation
Machine DC speed-regulating motor slowly rotates by pipe die；Fan-shaped bag upset working condition is checked, current-following inoculation device working condition is checked,
Ready quantitative molten iron is blended into fan-shaped bag, 1350 DEG C -1380 DEG C of molten iron temperature；Start pouring truck, cast chute is sent
A position is poured before in pipe die, a preceding position of pouring is away from ㎜ -500 ㎜ of casting front end flange end face 300；Gradually heighten pipe die rotation speed
Degree, until centrifugal force reaches 38G-50G；Start fan-shaped include oil-lifting jar, sector bag upset starts current-following inoculation device simultaneously, when
After molten iron falls into pipe die two to three seconds along cast chute, pouring truck is at the uniform velocity moved rearwards by, it is ensured that molten iron is evenly distributed in pipe die,
Stop movement after cast chute reaches after cast dead-centre position, rear cast dead-centre position is now fanned away from the ㎜ of casting flange end face 300
Shape bag overturns 90 ° and stops upset, closes current-following inoculation device, now molten iron has all been poured；Rotation 10-15 divides pipe die at a high speed
Start to reduce pipe die rotating speed after clock；Different with wall thickness according to caliber, the time that pipe die rotates at a high speed is also different；But rotate at a high speed
Centrifugal force can not be less than 38G；When casting temperature in pipe die is down to 400 DEG C, pipe die stops the rotation, and pipe die moves on to cooling with casting
Station continues to be cooled to room temperature；Open full mold centrifugal casting mould and take out casting；Resin sand feeding sand preparation plant is reclaimed
It is secondary after processing to utilize；The residual sand of pipe die inwall is cleared up, prepares the cast of moulding next time；
C, cleaning and processing, ball blast sand removal is carried out to casting, repaiies burr, detection outward appearance and size qualification；Machining；Processing
Flange seal waterline；
（4）Anti-corrosion and packaging；
A, preservative treatment；Internal and external anti-corrosive is carried out after the water pressure test is qualified；
B, packaging；Spray and pallet is used after shipping mark, wooden-box package is put in storage ready for delivery.
4. the equipment of a kind of full mold centrifugal casting double plate flange straight tube according to claim 1 and flange straight tube through walls, its
It is characterised by：The pipe fitting of described full mold centrifugal casting includes double plate straight tube, single double plate flanged pipe through walls flange tubing pipe through walls
Part, the double plate flange straight tube, single double plate flanged pipe through walls flange tubing pipe fitting through walls are monoblock cast, and nominal diameter is
DN80 millimeters-DN2600 millimeters, length is 5.8 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478600.2A CN107127316A (en) | 2017-06-22 | 2017-06-22 | The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478600.2A CN107127316A (en) | 2017-06-22 | 2017-06-22 | The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls |
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| Publication Number | Publication Date |
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| CN107127316A true CN107127316A (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710478600.2A Withdrawn CN107127316A (en) | 2017-06-22 | 2017-06-22 | The device and method of full mold centrifugal casting double plate flange straight tube and flange straight tube through walls |
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| CN (1) | CN107127316A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108436052A (en) * | 2018-06-21 | 2018-08-24 | 泽州县金秋铸造有限责任公司 | A kind of automatic centrifugal cast tube equipment |
| CN108526426A (en) * | 2018-06-21 | 2018-09-14 | 泽州县金秋铸造有限责任公司 | A kind of rotating dust removing device |
| CN109500372A (en) * | 2019-01-16 | 2019-03-22 | 陈杰 | A kind of movable type pours a mouthful centrifugal casting machine |
| CN110788276A (en) * | 2019-10-23 | 2020-02-14 | 常州市长力冲压机床有限公司 | Novel casting process for main bearing cap |
| CN112317715A (en) * | 2020-10-30 | 2021-02-05 | 张琪 | Pouring process for nodular cast iron production |
| CN117483694A (en) * | 2024-01-02 | 2024-02-02 | 山西昌达盛精密铸造有限公司 | High-chromium alloy centrifugal pipe casting machine and use method thereof |
| CN117983796A (en) * | 2024-04-02 | 2024-05-07 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
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| CN108436052A (en) * | 2018-06-21 | 2018-08-24 | 泽州县金秋铸造有限责任公司 | A kind of automatic centrifugal cast tube equipment |
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| CN109500372A (en) * | 2019-01-16 | 2019-03-22 | 陈杰 | A kind of movable type pours a mouthful centrifugal casting machine |
| CN109500372B (en) * | 2019-01-16 | 2021-02-12 | 济南隆超石油机械锻造有限公司 | Movable pouring opening centrifugal casting machine |
| CN110788276A (en) * | 2019-10-23 | 2020-02-14 | 常州市长力冲压机床有限公司 | Novel casting process for main bearing cap |
| CN112317715A (en) * | 2020-10-30 | 2021-02-05 | 张琪 | Pouring process for nodular cast iron production |
| CN117483694A (en) * | 2024-01-02 | 2024-02-02 | 山西昌达盛精密铸造有限公司 | High-chromium alloy centrifugal pipe casting machine and use method thereof |
| CN117483694B (en) * | 2024-01-02 | 2024-03-19 | 山西昌达盛精密铸造有限公司 | High-chromium alloy centrifugal pipe casting machine and use method thereof |
| CN117983796A (en) * | 2024-04-02 | 2024-05-07 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
| CN117983796B (en) * | 2024-04-02 | 2024-06-04 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
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Application publication date: 20170905 |