CN201702333U

CN201702333U - Cast tube crystallizer

Info

Publication number: CN201702333U
Application number: CN2010201790211U
Authority: CN
Inventors: 黄绍辉
Original assignee: Ningbo Jintian Copper Tube Co Ltd
Current assignee: Ningbo Jintian Copper Tube Co Ltd
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2011-01-12
Anticipated expiration: 2020-04-29

Abstract

A cast tube crystallizer comprises a primary crystallizer and a secondary crystallizer connected to the rear of the primary crystallizer. The primary crystallizer includes a primary casing, a primary inner drum, a primary copper sleeve, a primary cooling water inlet joint, a primary cooling water outlet joint, a front flange plate and a rear flange plate, wherein the primary inner drum is arranged inside the primary casing, the primary copper sleeve is arranged inside the primary inner drum, the primary cooling water inlet joint and the primary cooling water outlet joint arranged outside the primary casing are communicated with a primary casing cavity, and the front flange plate and the rear flange plate arranged at two ends of the primary copper sleeve enclose a cavity with two ends of the primary inner drum and are in sealing connection with the outer wall of the primary copper sleeve. Positioning blocks respectively fixed at two ends of the primary casing contact with the outer wall of the primary inner drum in an abutted manner; and mutually attached projecting circular rings are arranged in the middle of the primary casing between the primary cooling water inlet joint and the primary cooling water outlet joint by projecting the primary casing cavity towards the outer wall of the inner drum. The middle of the inner drum is in closely sealing connection with an annular projection fixed with the casing instead of being in welding connection, and two ends of the inner drum are fixed by contacting the positioning blocks in the abutted manner. The cast tube crystallizer ensures even gaps of a cooling cavity, thereby enhancing cooling strength, pull casting speed and production efficiency, and improving casting blank quality.

Description

A kind of cast pipe crystallizer

Technical field

The utility model relates to a kind of Casting Equipment, particularly casts the crystallizer of usefulness about copper pipe.

Background technology

The cast metal will discharge a large amount of heats in cooling and process of setting, this part heat all needs to pass to cooling water by crystallizer and water cooling plant thereof.The cast tube tube blank mould is fitted together by primary crystallization device and secondary crystallization device and constitutes, and the primary crystallization device directly makes metal freezing, and the secondary crystallization device makes the metal cooling of solidifying, anti-oxidation.The heat exchange situation and the water-cooled effect of crystallizer directly influence slab quality and productivity ratio.Conventional its inner core of cast pipe crystallizer adopts between housing and is weldingly fixed on, owing to there is welding deformation, can cause inner core and copper sheathing off-centre, thereby cause that the cooling cavity that forms between inner core and the copper sheathing is inhomogeneous in the cross-sectional direction gap, can cause inhomogeneous cooling to influence product quality; Also can fully cool off for the little part of assurance cooling chamber body space, must increase the gap between inner core and the copper sheathing, generally about 10mm.So just cause the crystallizer intensity of cooling not enough, cooling effect is relatively poor, from ingot casting section metallographic structure analysis (see figure 5), strand top is tiny column crystal, the bottom is thick column crystal, casting blank solidification organizes circumferential uniformity very poor, and transcrystallization is very obvious, and structure awaits further to improve.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of good cooling results, the simple cast pipe crystallizer of processing and fabricating at prior art.

The technical solution adopted in the utility model is: a kind of cast pipe crystallizer, comprise primary crystallization device and the secondary crystallization device that is connected thereafter, the primary crystallization device comprises housing one time, be located at an inner core in the housing one time, be located at a copper sheathing in the inner core one time, with be located at outer once the advancing of communicating with housing chamber of housing, go out warter connection, be located at the front and back ring flange that copper sheathing two ends and inner core two ends surround cavity and are tightly connected with copper sheathing outer wall, it is characterized in that described housing two ends stationary positioned piece respectively, described locating piece and inner tank theca be top contact mutually, once advances described, establish by the protruding protruding circular ring in housing chamber in the middle of going out a housing between the warter connection to inner tank theca and mutual applying.

The beneficial effects of the utility model are: closely be connected by cooperating with the fixing annular protrusion of housing in the middle of the inner core, no longer be welded to connect, therefore can not produce welding deformation, the inner core two ends adopt locating piece phase top contact to fix, guaranteed that the cooling chamber body section gap between inner core and the copper sheathing is even, can reduce to cool off gap to the 1～2mm of cavity, thereby improve intensity of cooling.3～6 locating pieces are installed respectively at the housing two ends, can be better fixing inner core, prevent when cooling water flow fashionablely, inner core is beat under the impact of current, causes inhomogeneous cooling even.Because intensity of cooling increases, casting speed can be brought up to 400～500mm/min by 220 original～230mm/min, has improved production efficiency, and the quality of strand also is improved simultaneously.From ingot casting section metallographic structure analysis, thick column crystal has obtained significant refinement, becomes tiny and uniform equiax crystal, and casting blank solidification organizes circumferential uniformity to be significantly improved.(seeing Fig. 4 a, b)

Description of drawings

Fig. 1 is a cross section of the present utility model structure chart.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is the B-B profile of Fig. 1.

Fig. 4 a, 4b are for adopting the ingot casting section metallographic structure figure of this mould casting.

Fig. 5 is for adopting the ingot casting section metallographic structure figure of existing crystallizer casting.

The specific embodiment

Referring to shown in Figure 1, the utility model crystallizer comprises primary crystallization device 1 and secondary crystallization device 2, and the primary crystallization device comprises a copper sheathing 8 of tubulose, is enclosed in an inner core 9 of these copper sheathing 8 periphery, is enclosed in a housing 5 of these inner core 9 periphery.Between copper sheathing 8 and inner core 9 is second cooling water cavity 11, and radial clearance L is 1～2mm, is first cooling water cavity 10 between inner core 9 and housing 5.Centre at the housing 5 and first cooling water cavity 10 establishes once to advance warter connection 3 and once go out warter connection 4, once establishing 2～3 groups into and out of warter connection 3,4 according to the big I of housing, is 7～8 crust from the water flow pressure of once advancing warter connection 3 inflows first cooling water cavity 10.Establish forward flange 14 and rear flange 7 at the two ends of a housing 5 and an inner core 9, establish the locating piece 6 of phase top contact at inner tank theca two ends at the two ends of a housing 5, locating piece 6 can be established 3～6 according to housing 5 diameter on housing 5 two terminal circle ring walls, housing 5 is divided into and is located at forward flange dish 14 and once goes out preceding piece housing 53 between the warter connection 4, be located at once, advance warter connection 4, protruding circular ring 51 between 3, and be located at the back piece housing 52 that once advances between warter connection 3 and the rear stub 7, once advancing, go out warter connection 3, establish by a housing chamber protruding in the middle of the housing 5 between 4 to inner core 9 outer walls and mutual protruding circular ring 51 of fitting.One end of preceding piece housing 53 is fixed on the indent annulus hole, right angle of forward flange 14 centres, form the back cavity 13 of second cooling water cavity 11 and first cooling water cavity 10, back piece housing 52 and inner core 9 front end form the flowing lumen of first cooling water cavity 10 and second cooling water cavity 11.The front end of copper sheathing 8 is fixedly clamped by flange bolt 16 and forward flange dish 14 and ring flange shroud 15.Secondary crystallization device 2 comprises secondary circular cone inner sleeve 18, secondary housing 19, secondary water supply connector 20, secondary effluent trough 21 and secondary water out adapter 22, and secondary circular cone inner sleeve 18 and secondary housing 19 are fixing by soket head cap screw and rear stub 7.Secondary water supply connector 20 is connected with the secondary cold rinse bank 21 and the secondary cooling water chamber that are located at secondary circular cone inner sleeve 18 peripheries, and the cooling water in secondary cooling water chamber is flowed out by secondary cold rinse bank 21 and secondary water out adapter 22.

Referring to illustrated in figures 1 and 2, in primary crystallization device 1, be inserted in graphite jig 17, graphite jig 17 is made up of core rod and outside cylinder die cavity, the outside cylinder die cavity is enclosed within copper sheathing 8, copper sheathing 8 periphery are that second cooling water cavity 11 is second cooling water cavities that surrounded by copper sheathing 8 and inner core 9, and radial spacing L is 1～2mm.In the periphery of second cooling water cavity 11 is an inner core 9, the annular protrusion 51 that the periphery of this inner core 9 is closely contacted surrounds, and with first cooling water cavity 10 intercept into preceding first cooling water cavity and the back first cooling water cavity, and to flowing forward from the cooling water water conservancy diversion of once going into warter connection 3, through first cooling water cavity 10 and second cooling water cavity 11, flow out from back cavity 13.Figure 2 shows that in the A-A section of Fig. 1 that original fixing with pad and inner core 9 with protruding circular ring 51 and inner core 9 tight fits replacements, it is indeformable to make inner core 9 not influenced by welding, uniformity axial and radially is all good.

Referring to Fig. 2 and shown in Figure 3, the protruding circular ring 51 in Fig. 2 and inner core 9 tight fits, first cooling water cavity 10 is separated by protruding circular ring 51.And first cooling water cavity 10 appears between back piece housing 52 and the inner core 9 in Fig. 3, forms to circulate mutually with first cooling water cavity 10 by once advancing warter connection 3, and first cooling water cavity 10 circulates mutually with second cooling water cavity 11.Establish locating piece 6 on housing 5 leading portion 53 and the back segment 52 in the first time front-end and back-end of an inner core 9 are fixed, Fig. 3 represents to establish on the housing 54 locating pieces 6.

Cooling water cyclic process in the primary crystallization device, cooling water in one cooling crystallizer 1 flows into from a water supply connector 3, enter first cooling water cavity 10 that surrounds by the back segment 52 of a housing 5 and inner core 9, second cooling water cavity 11 that inflow is surrounded by inner core 9 and copper sheathing 8, surround first cooling chamber 10 and enter water out adapter 4 one time through flowing into leading portion 53 by an inner core 9 and a housing 5 behind the back cavity 13 again, flow in the cooling water recirculation system, for preventing the water route fouling of crystallizer 1,2 inside, adopt the pure water closed cycle that cooling water is provided.

Claims

1. cast pipe crystallizer, comprise primary crystallization device and the secondary crystallization device that is connected thereafter, the primary crystallization device comprises housing one time, be located at an inner core in the housing one time, be located at a copper sheathing in the inner core one time, with be located at outer once the advancing of communicating with housing chamber of housing, go out warter connection, be located at copper sheathing two ends and inner core two ends surround cavity and with copper sheathing outer wall be tightly connected before, rear stub, it is characterized in that described housing two ends stationary positioned piece respectively, described locating piece and inner tank theca be top contact mutually, once advances described, establish by the protruding protruding circular ring in housing chamber in the middle of going out a housing between the warter connection to inner tank theca and mutual applying.

2. a kind of cast pipe crystallizer according to claim 1 is characterized in that being surrounded by a copper sheathing (8) and an inner core (9) second cooling water cavity (11) of radial spacing 1～2mm.

3. a kind of cast pipe crystallizer according to claim 1 is characterized in that from the water flow pressure of once advancing warter connection (3) inflow first cooling water cavity (10) be 7～8 crust.

4. a kind of cast pipe crystallizer according to claim 1 is respectively established 3～6 locating pieces (6) on a housing of its feature (5) the two terminal circle ring wall.

5. a kind of cast pipe crystallizer according to claim 1, it is characterized in that primary crystallization device housing (5) is divided into is located at forward flange dish (14) and once goes out preceding piece housing (53) between the warter connection (4), be located at once, advance the protruding circular ring (51) between warter connection (4), (3), and be located at the back piece housing (52) that once advances between warter connection (3) and the rear stub (7).