DE10357419B3 - Transport roller for hot extruded steel billets has end caps covering water collection chambers to link cooling passages - Google Patents

Abstract

A steel mill extrudes billets onto a track consisting of a series of transverse rollers each with an elongated core separated from an outer mantle by a series of transverse coolant passages distributed equidistantly around the core. The coolant passages are connected to a common liquid inlet distribution chamber and a common liquid collector chamber to an outlet. The chambers are formed by an end-cap.

Description

The The invention relates to an internally cooled supporting or transport role, especially for Stahlstranggießanlagen according to the generic term of claim 1.

In steel casting become support and leadership the strand used a variety of roles, arranged in scaffolding and cooled from the inside are.

• – Massivrollen, bei denen im Wesentlichen nur die Zapfenbereiche gekühlt werden
• – Revolverrollen mit im Mantelbereich über den Umfang verteilt angeordneten längs verlaufenden Kühlkanälen
• – Wendelrolle mit im Mantelbereich angeordneter Kühlwendel

Depending on the construction, continuous rolls, ie without support of the roll center, can be divided into the following types:

• - Solid rollers, in which essentially only the pin areas are cooled
• - Revolverrollen distributed in the shell region over the circumference arranged longitudinal cooling channels
• - Coiled roll with arranged in the jacket area cooling coil

(H. Schrewe, continuous casting of steel, introduction and Fundamentals, Verlag Stahleisen, Düsseldorf 1987; P. 43, 44)

• – aufwendig herzustellende Schrägbohrungen
• – zu Undichtigkeiten neigende Stopfenverschlüsse
• – mehrfach umgelenkte Wasserführung
• – hoher Fertigungsaufwand
• – schwierige Reinigung der Kanäle (Späne, Ablagerungen)

The turret roller of interest here is characterized in that the Wasserfühnug from a central central bore extends through individual oblique channels in the longitudinal channels. The resulting so outside the front sides openings are closed by plugs. Both the oblique holes as well as the plugs are technically problematic. Overall, the known turret roll has the following disadvantages:

• - complicated to produce inclined holes
• - Stopper closures prone to leaks
• - Multiple redirected water supply
• - high production costs
• - difficult cleaning of the channels (chips, deposits)

From the DE 30 12 736 C2 is known a continuous casting roll, which consists of a solid elongated cylindrical core with distributed in the shell region over the circumference arranged longitudinal cooling channels.

One formed as a pin insert piece is connected to the core by a Weld connected, wherein the distance of the inner end face of the insert to face the core forms a water mask into which the cooling channels open. By the pin of the insert extends an incoming or outgoing channel, the over a sloping extending connecting channel is connected to the water supply.

adversely in this arrangement, the complex production of the insert and the difficult cleaning option of the oblique extending connecting channel of chips caused during manufacture and Residues.

task The invention is an internally cooled support or transport role of Type revolver role to improve so that the disadvantages of the known Turret roll can be avoided.

These Task is based on the generic term in conjunction with the characterizing Characteristics of claim 1 solved. Advantageous developments are the subject of dependent claims.

To The teaching of the invention is at least one end region of the roll with an outward sealed water reservoir (ring channel) provided and between the influx and / or laxative Channel and the water template is arranged a connection channel.

Preferably the sealing completion of the water mask is designed as a lid and either welded or screwed in sealing. The connection channel is either as radial or oblique extending bore formed and in the jacket area or in the frontal Closed area of the roll.

The Turret roller according to the invention can be formed in one piece or multiple parts. In the latter case is the core is provided with a coat covering it, which on both Sides over extends beyond the core. The resulting open pages are each closed with a lid. The space between the lid and core forms the water mask, which is attached via a pin Transverse bore with the incoming or outgoing Channel is connected.

• – einfache Herstellung der Kanäle,
• – erleichterte Reinigung der Kanäle,
• – geringerer Druckverlust durch einfachere Wasserführung,
• – geringerer Fertigungsaufwand.

As advantages of the turret roller produced according to the invention are:

• - easy production of the channels,
• - easier cleaning of the channels,
• - lower pressure loss due to easier water supply,
• - lower production costs.

Further Advantages and details of the invention will become apparent from the following Description of the illustrated embodiments.

It demonstrate:

1a a longitudinal section through a turret roll produced according to the invention,

1b a section in the direction of AA from 1a .

2 in longitudinal section a lid design,

3 a variant of 2 .

4 A second embodiment of a turret roll produced according to the invention,

5 a variant of 1a ,

In 1a , b is a longitudinal and a cross section of a first embodiment of a turret roller according to the invention 1 shown. It consists in this embodiment of a trained as a solid core 2 in the known manner in the mantle area with several parallel to the longitudinal axis 3 extending cooling channels 4 is provided.

According to the invention, in the end regions of the turret roll 1 a water template 5 . 5 ' arranged, which connects to the individual cooling channels 4 manufactures. In each pin 6 . 7 is in the middle a supply or discharge channel 8th . 9 arranged. A connection channel 10 . 11 provides the connection between the supply and discharge channel 8th . 9 and the water mask 5 . 5 ' ago.

The outer seal of the water mask 5 . 5 ' is through a lid, 12 . 13 ensured. In this embodiment, the respective lid 12 . 13 shrink wrapped. As an alternative, it can also be designed as a screwable cover with corresponding sealing elements (see description of FIG 2 and 3 ).

The connection channel 10 . 11 is in this embodiment, a radially extending bore extending through the core 2 extends and in the supply and discharge channel 8th . 9 empties. Located in the mantle area of the core 2 resulting opening is through a plug 14 . 14 ' closed, in this case by welding.

In the 2 and 3 are other versions of lids 16 . 17 . 17 ' shown. Both are designed as screwable lid, optionally with an external or internal thread (not shown here) may be provided.

In 2 The seal is carried out at the front with in grooves 18 . 18 ' arranged sealing elements 19 , here in the form of O-rings. In contrast, according to 3 chosen a radial seal. For this purpose, a groove is on the outer and inner cladding region 20 . 21 provided, in which a sealing element 22 can be inserted.

In the lower half of 3 is the lid 17 formed in one piece, while in the upper half of the lid 17 ' is two-piece. The inner groove 21 is in this case in a separate use 29 arranged.

In 4 is a second embodiment of a turret roll produced according to the invention 23 shown. In contrast to the embodiment according to 1a it is in two parts with an inner core 24 and a cloak that covers it 25 ,

The coat 25 surpasses the core 24 on both sides, with the open sides covered by a lid 26 . 26 ' are closed. The space between the lid 26 . 26 ' and core 24 forms the water mask 27 . 27 ' , The connection between the supply and discharge channel 8th . 9 and the water mask 27 . 27 ' via a transverse bore 28 . 28 ' ,

In this illustration, according to the arrows shown, the supply of the cooling medium from the left via the supply channel 8th , over the cross hole 28 in the left water template 27 and from there into the longitudinal cooling channels 4 , The removal takes place via the right water template 27 ' , over the cross hole 28 ' and the discharge channel 9 , The center hole is closed on both sides.

5 shows a second variant of in 1a illustrated embodiment, wherein like reference numerals have been selected for like parts. In this embodiment, the turret role 30 only supplied from one side with the cooling medium. This is in the middle hole 31 a siphon pipe 32 arranged.

The cooling medium passes from the left through the pin 6 arranged supply channel 8th in the water mask 5 and is distributed from there to the longitudinal cooling channels 4 , After passing through the cooling medium collects in the water right-hand template 5 ' and flows into the right cone 7 arranged discharge channel 9 , To prevent leakage is in the discharge channel 9 a sealing plug 33 screwed. The cooling medium now flows through the siphon tube 32 back again.

So that a short circuit of the cooling medium guide through the center hole 31 is avoided, this is closed on both sides, allowing a forced pass through the cooling channels 4 and the siphon tube 32 is guaranteed.

The extension of the siphon tube 32 in the right-hand pin 7 is required to allow the cooling of the pin 7 and thus their storage is ensured. In contrast to the left-lying pin 6 is the right-lying pin 7 together with the lid 13 formed in one piece.

Claims (9)

Internally cooled support or transport roller especially for Stahlstranggießanlagen consisting of an elongated cylindrical core, which is provided in the shell region with a plurality of circumferentially spaced parallel to the longitudinal axis extending cooling channels, at least in an end portion of the roller designed as a pin with a supply and / or discharge channel are connected via an externally sealed water supply, and a connecting channel arranged between the inlet and / or outlet channel and the water mask, characterized in that the connecting channel ( 10 . 11 . 28 . 28 ' ) perpendicular to the inlet and / or outlet channel ( 8th . 9 ) and the sealing closure of the water ( 5 . 5 ' . 27 . 27 ' ) as a separate lid ( 12 . 13 . 16 . 17 . 26 . 26 ' ) is trained. Roller according to claim 1, characterized in that the lid ( 12 . 13 . 26 . 26 ' ) is welded. Roller according to claim 1, characterized in that the lid ( 16 . 17 ) can be screwed. Roller according to claim 3, characterized in that the lid ( 16 ) at the end with sealing elements ( 19 ) is provided. Role according to claim 3 , characterized in that the lid ( 17 ) on the outer and inner circumferential surface with at least one sealing element ( 19 ) is provided. Roller according to claim 4 or 5, characterized in that the sealing element ( 19 ) is an O-ring. Roller according to one of claims 1-6, characterized in that the connecting channel ( 10 . 11 ) is formed as a radially extending bore, which is closed in the lateral region of the roller. Roller according to claim 1, characterized in that the core ( 24 ) with a coat comprising it ( 25 ) located on both sides above the core ( 24 ), wherein the resulting open sides are provided with a lid ( 26 . 26 ' ) are closed and the space between the lid ( 26 ; 26 ' ) and core ( 24 ) the water template ( 27 . 27 ' ), which via a transverse bore mounted in the journal ( 28 . 28 ' ) with the incoming or outgoing channel ( 8th . 9 ) connected is. Roller according to claim 1, characterized in that the central region of the core ( 2 ) a longitudinal bore ( 31 ), in which one of a pin ( 6 ) to the opposite pin ( 7 ) extending siphon tube ( 32 ) and the discharge channel ( 9 ) with a sealing plug ( 33 ) and the central bore ( 31 ) on both sides with respect to the siphon tube ( 32 ) is sealed.