CN1021549C - Conical slag remover and manufacturing method thereof - Google Patents

Abstract

The invention provides a conical slag remover widely applied to the fields of papermaking and chemical industry and a manufacturing method thereof. It uses polyurethane rubber as main material, the upper body and cone section are connected by flange or screw thread, the slag remover not only has the metal reinforcement pre-embedded in the pipe wall of feeding pipe and discharging pipe, but also has the steel sleeve and steel hoop pre-embedded at the cone interface of sectional connection, so that it not only has the advantages of transparency, light weight, corrosion resistance and wear resistance, but also has good integral connection property, convenient assembly and disassembly and safe use, and especially the connection mode of cone sectional combination makes the easy-to-replace section easier, thus prolonging the service life of slag remover.

Description

Taper deslagging unit and mfg. method

The present invention relates to a kind of cyclean and this manufacture method thereof that impurity in the slurries is screened except that scummer.

Cyclean is a kind of screening plant that is widely used in the fields such as papermaking, chemical industry.It is to utilize the cone shaped body in the scummer and be located at discharging opening, lower end (awl is most advanced and sophisticated) the impurity mouth of upper end and the charging aperture of establishing along the tangent line position, side of cone, make slurries in the awl chamber, produce high-speed rotational, thereby the slurries of light specific gravity are screwed out from discharging opening, heavier impurity is then discharged from the impurity mouth, and then reaches the purpose of screening and purification.

At present, the domestic material of manufacturing this scummer mainly contains three kinds: 1, cast iron or cast steel, 2, glass, 3, vulcanie.Though the scummer mechanical strength of cast steel or cast iron is higher, bearing capacity is strong, and is heavy, and installing/dismounting is all inconvenient.Because it is opaque, can not in time find the stifled phenomenon of card in the scummer, even found that card is stifled, mediation also is the thing of part danger close, because the mediation card is up to disclose from boring sharp impurity mouth with hammer drill when stifled, and the impurity mouth tends to form sharp burr by long-time and hard impurity wearing and tearing, has put forth one's strength little like this can not block up thoroughly, just very easily allows burr scratch hand and put forth one's strength greatly.The cast iron and cast steel scummer also has rough inner surface easily to scrape the defective of slurry and corrosion-proof wear poor performance in addition.Though thereby cast iron and cast steel is one-time formed scummer low cost of manufacture, its service life is low too.

Though the glass scummer has overcome the defective of opaque, the corrosion-proof wear poor performance of cast iron and cast steel scummer, produces the unsurmountable defective of itself thereupon.At first the glass scummer is very crisp, and it is made with integral forming technique in addition, not only is difficult to guarantee the physical dimension of its manufacturing, and very easily broken, which point breaks and all make whole scummer become waste product in transportation or installation process.Another shortcoming of glass scummer is, easily stabs the hand from the impurity mouth except that resembling cast iron and cast steel, and it also has the explosive danger of cold-starting.

Though vulcanie has the advantage that body is light, inner surface is bright and clean and machining accuracy is high, it exists not only at normal temperatures but also easier at low temperatures embrittlement.Particularly in the cone when contact oils or some other organic solvent, inner is aging serious, and outside be subjected to the radiation of sunlight after, more can aggravate its aging speed.Therefore, adopt the vulcanie scummer not only suitable working environment will be arranged, but also will select its working media, thus its use be have circumscribed.

In order to address the above problem, United States Patent (USP) 4,793,925 once disclosed a kind of hydraulic cyclone apparatus.The shell of this cyclone is to dress up one by the last vortice of hard polyurethane and lower cone assembly by thread set, and is lined with band sealing flange and removable elasticity polyurethane internal layer in the lower cone assembly.This by three cyclones that constitute, though its outer rigid housing and flexible inner layer structure, solved the wear-resisting of internal layer and wearing and tearing after the replacing problem, kept certain outer cover intensity again, this type of device is in production operation, be in time to find wearing and tearing or stifled all being difficult to of the card of cone that internal layer occurs, so just easily cause; Expand probably after the internal layer wearing and tearing and prolong to wearing and tearing to shell.When if card is stifled, it is inaccurate that its position is judged, in a single day it is unfavorable to get rid of, whole cone assemblies must be disassembled and above-mentioned situation occurs, get rid of or change, so, both bothered, may cause long stopping production again.In addition, this cyclone is that swirler and discharge nozzle are made one, and in fact cyclone also has discharge nozzle except that cone is easy to wear, but in case this structure discharge nozzle breakage just can cause scrapping of whole vortice, this can cause bigger waste.

The purpose of this invention is to provide a kind of simple in structure, and housing and wear-resisting working lining are the manufacture method of cyclean and this scummer thereof of one deck also, this scummer not only has body light, transparent and the rigid body of point of attachment and the characteristics that flexible body is integrated, and easy connection, sealing is strong, change rapidly, but and multistage combination.

The object of the present invention is achieved like this: the enforcement of this scummer comprises by upper body and cone and connects the housing that constitutes through screw thread or ring flange, and be located at feed pipe and discharge nozzle on the housing, its architectural feature is: the main body of this scummer is made by polyether-type ammonia ester rubber, in the tube wall of the feed pipe of upper body and discharge nozzle and the equal built-in metal girth member in connection place of cone itself; Metal reinforced that is embedded in feed pipe and the discharge nozzle tube wall is steel pipe, and steel pipe half in the upper body in the discharge nozzle is embedded in the polyurethane tube wall of discharge nozzle fully, and expose the upper end, upper body second half only the steel pipe inwall have the polyurethane rubber bushing pipe.Connect equal pre-buried steel loop in the ring flange of upper body and cone or cone and cone, thread connection is then pre-buried in an interface is with externally threaded steel bushing, is with the then pre-buried stirrup of cylindrical of internal thread interface at another.

The preparation method of this scummer is: it comprises gives aggressiveness and add vulcanizing agent in giving aggressiveness polyether types of polyurethane rubber is synthetic, and the warm of casting mold, it is characterized in that: before mould and die preheating pre-buried metal reinforced is fixed in the metal die, the cast upper body is embedded in steel pipe in the feed pipe before tube core down, equidistantly be bonded at the outside or the inboard of steel pipe before inserting steel pipe earlier with the identical fritter polyester sheet of thickness; The point of attachment of upper body and cone is behind the mould matched moulds, the steel disc ring or have externally threaded steel bushing and put into annular groove, cast from top to down; Cone or cone segments are all with cover die, core and bed die moulding, cover die and core are inserted in respectively in the groove of bed die, if interface is a flange, just be provided with the groove of pre-buried steel loop at cover die one end, if last interface is band internal thread and lower interface be with externally threaded, just be with externally threaded die through thread connection one in the core upper end, and stirrup is established in the internal thread outer ring, in the tapped groove of bed die, will be with externally threaded steel bushing to be screwed into groove again, make the interior tapped once pre-buried moulding by casting of lower interface of going up interface and band external screw thread steel bushing of stirrup in addition, if the awl apical segment is tapped interface, in bed die, establish die.

Narrate the implementation method of structure of the present invention and each procedure below according to accompanying drawing.

Fig. 1 is the cutaway view of cyclean of the present invention.

Fig. 2 is the upper body die cut view.

Fig. 3 is one section prod cast tool cutaway view.

Fig. 4 is two sections prod cast tool cutaway views.

Fig. 5 is three sections prod cast tool cutaway views.

As shown in Figure 1, the material of this scummer all adopts polyurethane rubber, is advisable with polyether types of polyurethane rubber, and its basic housing adopts the two-part structure, and epimere is upper body 1, and hypomere is a cone 2.Upper body 1 and cone 2 can adopt two kinds of connecting modes (these two kinds of connecting modes also can connect with the cone segmentation with cone): one connects with ring flange 3, the pre-buried bolt hole steel disc ring 4 that has in this ring flange 3, it be in the upper body 1 and cone 2 before moulding by casting, place in the pattern in advance, therefore, steel disc ring 4 is contained in the ring flange 3 of polyurethane rubber.So not only can increase the linking intensity of two bodies, and polyurethane rubber also plays the sealing gasket effect of 3 on two ring flanges, again protective effect has been played in the antirust and corrosion protection of steel disc ring 4 simultaneously.Second kind of connecting mode of upper body 1 and cone 2 is thread connection, this connecting mode can be divided into following several: best mode is to have in the polyurethane rubber interface that externally threaded steel bushing 5 is embedded in upper body 1, cone 2 interfaces are then made internal thread, but should pre-buried stirrup 6 in the outer ring of internal thread interface, to prevent making cone 2 in the spalling of hickey place because of the tensions that upper body 1 and cone 2 are twisted.No matter this structure is that connection and sealing are all better.The thread connection of upper body and cone can also adopt other dual mode: promptly directly this polyurethane rubber is processed into thread connection, perhaps directly be with the steel joint of internal and external threads to connect with two, but this connection with the steel joint will possess two conditions, 1, steel joint other parts except that screw thread will be embedded in separately the interface material; 2, to add sealing gasket at two thread connection places.By the above three kinds of threaded connection mode, wherein have the interface of internal thread, not only can be located on the cone 2 but also can be located on the upper body 1.And thread connection is if pre-buriedly in an interface be with externally threaded steel bushing, so then must pre-buried stirrup at the cylindrical of another band internal thread interface.

Though it is the bright and clean integral body of inwall awl chamber that cone 2 requires when user mode, because structure is different with duty, thereby its degree of wear is also different, and the most easy to wear be the impurity mouth 7 of cone tip part.For this reason, the compound mode that the cone 2 of this scummer adopts three sections (two interfaces) to connect, its connection can be adopted as flange plate type or the threaded connection mode of upper body 1 with cone 2.According to the needs of different operating condition and size, the connecting combination and can establish 1-3 interface and be advisable of the cone segments of cone 2 and cone segments.

Be provided with a feed pipe 8 outside a side of upper body 1 on the tangent line, this feed pipe 8 is designed in its outside for glue pipe socket, makes it to connect with material feeding equipment.For making feed pipe 8 and connect the tighter and don't distortion that sebific duct connects, pre-buried metal reinforced is steel pipe 9 in the tube wall of feed pipe 8.Discharge nozzle 10 is assembled on the upper body 1, and it half is located in the upper body 1, and keeps concentric with upper body 1 and cone 2, and second half upper end of then passing upper body 1 is fastened on it on upper body 1 with metal nuts 11.An also pre-buried steel pipe 12 in the tube wall of discharge nozzle 10, an and semi-steel pipe 12 that is located in the upper body 1 is embedded in the tube wall of discharge nozzle 10 fully, and expose 1 upper end, upper body second half only steel pipe 12 inwalls with the polyurethane rubber lining.If other union-screw coupling mouth that links with this scummer is a ring flange, feed pipe 8 and discharge nozzle 10 also can adopt the ring flange 3 the sort of connecting modes of pre-buried steel loop 4, just an end of steel pipe 9,12 affixed again steel disc ring 4 pre-buried again, but the discharge nozzle 10 of this mode preferably forms one with upper body 1.In order to make above-mentioned each metal embedded part can better be affixed with the polyurethane rubber of each interface, comprise: steel disc ring 4, steel bushing 5, stirrup 6 and steel pipe 9,12 all have uniform round open-work, like this, polyurethane rubber both can encase metal reinforced, can when cast, inject open-work again, make it more firm in conjunction with getting.

Narrate the manufacture method of this scummer below in conjunction with said structure.Because polyurethane has the branch of polyether-type and polyester-type, be EU cast rubber and material of the present invention mainly adopts, therefore related in the following description polyurethane all refers to polyether-type.But if on basis of the present invention, as long as set up the equipment that is suitable for pouring into a mould polyester-type, method for production of this scummer and structure then can be suitable for the application of Polyester based Polyurethane Rubber fully so.At first have a talk the synthetic aggressiveness technology of giving of polyurethane.Synthesize and give the preparation that aggressiveness is this method for production, the step that it adopts is: put into reactor after earlier the polyether-type dihydroxylic alcohols being weighed and be heated between 95-105 ℃, reduce to room temperature after vacuum dehydration 30-40 minute.Again with toluene di-isocyanate(TDI) in toluene di-isocyanate(TDI): the ratio of dihydroxylic alcohols=1: 3.5-2.8 joins in the reactor that fills dihydroxylic alcohols, stirs when being warmed up to 85-95 ℃, is incubated 90-120 minute again and gives that aggressiveness is promptly synthetic to finish.At last just can analyze the isocyano-content that gives in the aggressiveness in 12-24 hour in the room temperature sealing and standing.Then, will give aggressiveness and be warming up to 90-100 ℃ of vacuum defoamation 30-40 minute, will be in granular MOCA vulcanizing agent again and be warmed up to 110-120 ℃ and make it become liquid state.Like this, just the content that gives isocyano in the aggressiveness that can draw according to chemical analysis, add above-mentioned vulcanizing agent in right amount, it gives aggressiveness: the ratio of vulcanizing agent is 1: 0.22-0.13, stir, so far the preparatory process of cast polyurethane liquid is ready fully.

Narrate each section manufacture method of cyclean among Fig. 1 below with reference to die drawing 2-5.

As shown in Figure 2, this figure is the upper body 1 metal die figure that the mode with ring flange connects with cone 2, and its mould is divided into cover die 13, core 14 and tube core 15.Mould before the cast all will be preheating to 110-130 ℃, be advisable with 120 ℃, and the preheating of following each mould is all by this temperature control.Then, cover die 13 matched moulds that will form by two halves and fix earlier with clip, then core 14 down, before tube core 15 down, want earlier Fig. 1 in steel pipe 9 reeve cover dies 13 pipe dies in the feed pipe 8.In order to make steel pipe 9 keep concentric with cover die 13 and tube core 15 exactly, before inserting steel pipe 9, equidistantly be bonded at the two ends, the outside of steel pipe 9 with diameter (or length of side) for the identical fritter of 2-5 millimeter thickness (not sulfuration) polyurethane sheet 16 earlier, again tube core 15 is passed in the jack that steel pipe 9 is inserted into core 14, if fritter polyurethane sheet 16 is bonded at the inboard of steel pipe 9, also can reach same effect.Behind the entire die matched moulds, just steel disc ring 4 is put into the ring flange annular groove that cover die 13 is established.Because upper body 1 adopts this direction of Fig. 2 to pour into a mould from top to down, the natural horizontal plane after the cast is the interface of Fig. 1 ring flange 3 like this, thus must the level of corrections face before cast, in case connect the eccentric phenomena of generation because of mould tilts to cause ring flange.Just pourable after above-mentioned preparation finishes, still need behind the notes under 110-120 ℃ of constant temperature, to be incubated 40-80 minute, but be generally just die sinking in 60 minutes according to annotating the part size.Also under 110-120 ℃ of condition, be incubated 210-270 minute after the die sinking, carry out further vulcanization reaction, so that make polyurethane rubber can reach its requirement of strength rapidly.Just can check at last, the trimming burr, so far, this discharge nozzle 10 has just formed with the upper body of upper body 1 separate type.Have externally threaded steel bushing 5 if the steel disc ring 4 in the time of will pouring into a mould changes into, and change cone 2 connection forms accordingly, this ring flange connecting mode just becomes threaded connection mode so.The circular hole 18 of screw 17 on the core 14 among Fig. 2 and tube core 15 ends all is to load and unload mould for convenience and set up and connect the connection holes attach.

Fig. 3 cooperates one section awl die drawing shown in Figure 2.It is that three sections combinations connect and to form that this cone is divided into, and the pouring procedure of three sections awls, sulfuration process be identical with the upper body all, is that mould is different.The mould of one section awl is to be made of cover die 19, core 20 and bed die 21, and cover die 19 is up big and down small cylindrical shapes, and at the groove that has a pre-buried steel loop 4 suitable for reading, end opening is inserted in the inner annular recess 22 of bed die 21.Ring groove 23 in bed die 21 inner annular recess 22 inner lanes also have, lining ring groove 23 is lower than inner annular recess 22, and has internal thread in lining ring groove 23 outsides, and in the high spot at ring groove 23 centers are positioning boss 24.Should will be screwed in the internal thread of groove 23 with externally threaded steel bushing 5 earlier before the matched moulds, the detent with core 20 lower ends (microcephaly) inserts on the positioning boss 24 of bed die 21 again, makes bed die 21 and core 20 keep concentric.And then cover die 19 is inserted in the inner annular recess 22 of bed dies 21, behind matched moulds like this, cover die 19, bed die 21 and core 20 not only connect fastening, and all can keep concentric, just all can make the identical wall thickness of this section cone maintenance after the cast.At last, if just put into steel disc ring 4 with the ring flange connection in the annular groove of cover die 19, other can carry out with reference to the moulding process of upper body 1.This section is to go up flanged dish 3 of end interface and pre-buried steel loop 4 after the demoulding, and end connector is one section awl of band external screw thread steel bushing 5 down.

The mould of Fig. 4 also is made up of cover die 25, core 26 and bed die 27, basic identical with Fig. 3 structure, different is for it: because its upper end (major part) will connect with the lower end (microcephaly) of Fig. 3, therefore it must form internal thread in the top, and stirrup 6 also will be established in the outer ring of internal thread, so just can reach tight, firm that two sections awls connect.Therefore, what the last interface of this section leaned on is, is with externally threaded die 28 in core 26 upper ends through thread connection one, thereby makes the just disposable internal thread interface that forms naturally of this section tapered joint mouth after the moulding, has avoided the trouble of reprocessing screw thread after the moulding.Also associate easily from this structure, if thread connection is adopted with cone 2 in upper body 1, the formation of cone 2 interfaces just can be adopted the method so.Other cast of this section awl and moulding process are the same with Fig. 2's, just be not described in detail at this, so only the big mouth that adopted of Fig. 3-4 up pouring type be bubble floating when helping pouring into a mould.

Fig. 5 is the awl apical segment of cone, it be from cone tip part as cast gate, be that mould or matched moulds are all fairly simple like this.This section die is to be made of cover die 29, core 30, die 31 and bed die 32, is characterized in that the positioning boss of die 31 crouches in the detent of bed die 32, and the positioning boss of core 30 then crouches in the detent of die 31.

Behind the formation mould by Fig. 2-5, the segmentation monomer spare of whole cyclean basically forms, because the structure of the discharge nozzle 10 of employing separate type is simpler, is not described in detail with regard to not doing at this.In actual use, can increase and decrease the number of fragments of cone 2 as required, also can utilize each section forming method of the present invention, the ring flange of each section usefulness such as Fig. 2-3 is connected, or the core 20,26 and 30 of Fig. 3-5 made an integral body, the segmentation of each section cover die connects, and after making so is a whole cone.If cover die among Fig. 2 13 and core 14 are done corresponding change, just discharge nozzle 10 and upper body 1 can be poured into an integrated entity, form fixed.Equally, if feed pipe 8 and discharge nozzle 10 among Fig. 1 need connect with ring flange with miscellaneous equipment, as long as the corresponding mould of changing just can obtain the interface of flange plate type as pre-buried steel loop 4.

The present invention not only possesses light, transparent, wear-resisting, the anti-corrosion advantage of body owing to adopted polyurethane rubber as material of main part, but also it is convenient to have reached mounting or dismounting, is not afraid of collision and adapts to the effect that all kinds of conditions are used, and is safe and reliable. Particularly metal embedded part is located at the structure of each interface, not only good airproof performance, and linking intensity height, the simultaneously segmentation of cone combination had both reduced whole tapered difficulty of processing, was convenient to again change the rapid wear section, the service life of correspondingly having improved scummer.

Claims (5)

1, a kind of cyclean, it comprises by upper body and cone and connects the housing that constitutes through screw thread or ring flange, and be located at feed pipe and discharge nozzle on the housing, it is characterized in that: the main body of this scummer is made by polyether-type ammonia ester rubber, in the tube wall of the feed pipe of upper body and discharge nozzle and the equal built-in metal girth member in connection place of cone itself; Metal reinforced that is embedded in feed pipe and the discharge nozzle tube wall is steel pipe, and steel pipe half in the upper body in the discharge nozzle is embedded in the polyurethane tube wall of discharge nozzle fully, and expose the upper end, upper body second half only the steel pipe inwall have the polyurethane rubber bushing pipe; Connect equal pre-buried steel loop in the ring flange of upper body and cone or cone and cone, thread connection is then pre-buried in an interface is with externally threaded steel bushing, is with the then pre-buried stirrup of cylindrical of internal thread interface at another.

2, cyclean according to claim 1 is characterized in that: the discharge nozzle that can separate with the upper body is anchored on the upper end of upper body with metal nuts, and cone can be made into an integral body, and also available screw thread or the ring flange that has metal reinforced connects.

3, cyclean according to claim 1 is characterized in that: in feed pipe and discharge nozzle tube wall and the built-in metal girth member of the connection place of cone itself all have round open-work.

4, a kind of method of making the described cyclean of claim 1, it comprises gives aggressiveness and add vulcanizing agent in giving aggressiveness polyether types of polyurethane rubber is synthetic, and the warm of casting mold, it is characterized in that: before mould and die preheating, pre-buried metal reinforced is fixed in the metal die, the cast upper body is embedded in the steel pipe in the feed pipe before following tube core, equidistantly be bonded at the outside or the inboard of steel pipe before inserting steel pipe earlier with the identical fritter polyester sheet of thickness; The point of attachment of upper body and cone is behind the mould matched moulds, the steel disc ring or have externally threaded steel bushing and put into annular groove, cast from top to down; Cone or cone segments are all with cover die, core and bed die moulding, cover die and core are inserted in respectively in the groove of bed die, if interface is a flange, just be provided with the groove of pre-buried steel loop at cover die one end, if last interface is band internal thread and lower interface be with externally threaded, just be with externally threaded die through thread connection one in the core upper end, and stirrup is established in the internal thread outer ring, in the tapped groove of bed die, will be with externally threaded steel bushing to be screwed into groove again, make the interior tapped once pre-buried moulding by casting of lower interface of going up interface and band external screw thread steel bushing of stirrup in addition, if the awl apical segment is tapped interface, in bed die, establish die.

5, a kind of method of making cyclean according to claim 4 is characterized in that: cone segments adopts big mouth pouring type up, and the awl apical segment is as cast gate from cone tip part.

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