阅读说明：本技术 为冷却金属带或其他轧件的冷却设备动态供给冷却剂的装置 (Device for dynamically supplying a cooling medium to a cooling device for cooling metal strips or other rolling stock ) 是由 J·阿尔肯 U·鲍姆加特尔 U·克拉默 W·富克斯 R-F·雅格 J·基斯林-罗马纽斯 于 2013-07-05 设计创作，主要内容包括：本发明涉及一种用于冷却金属带的装置,其包括：用于冷却金属带或其他轧件的冷却设备,该冷却设备包括至少一个具有冷却剂出口的喷射梁用于将冷却剂输出到金属带上；管路部件,其用于将冷却剂流从冷却剂源输送到所述喷射梁；其中,所述装置还包括以下部件：绕行部件,其用于将所述冷却剂流从所述管路部件引到回流部中；以及可切换的转向部件,其构造用于可切换地将所述冷却剂流通过所述管路部件引到所述喷射梁或者将所述冷却剂流从所述管路部件导流到所述绕行部件中,其中所述可切换的转向部件位于所述喷射梁的上游少于5m的位置处,其中,所述管路部件还包括泵用于提高由所述冷却剂源提供的冷却剂的体积流量,并且冷却剂流能借助于旁路绕过所述泵。(The invention relates to a device for cooling a metal strip, comprising: a cooling apparatus for cooling a metal strip or other product, the cooling apparatus including at least one spray beam having a coolant outlet for outputting coolant onto the metal strip; a conduit member for conveying a coolant flow from a coolant source to the spray beam; wherein the device further comprises the following components: a bypass member for introducing the coolant flow from the pipe member into a return portion; and a switchable diverting part configured to switchably lead the coolant flow through the pipe part to the spray beam or from the pipe part into the bypass part, wherein the switchable diverting part is located less than 5m upstream of the spray beam, wherein the pipe part further comprises a pump for increasing the volumetric flow of coolant provided by the coolant source and the coolant flow can bypass the pump by means of a bypass.)

1. An apparatus for cooling a metal strip, comprising:

cooling device for cooling a metal strip or other rolled stock, comprising at least one spray beam (1, 1') with a coolant outlet for delivering coolant onto the metal strip;

-a conduit part (2, 20 ') for conveying a coolant flow from a coolant source (4) to the spray beam (1, 1');

characterized in that the device further comprises the following components:

a bypass member for leading the coolant flow from the piping member (2, 20') into a return portion (3); and

a switchable diverting part (5, 50 ') configured to switchably lead the coolant flow through the pipe part (2, 20') to the spray beam (1, 1 ') or to divert the coolant flow from the pipe part (2, 20') into the detour part, wherein the switchable diverting part (5, 50 ') is located less than 5m upstream of the spray beam (1, 1'),

wherein the line component (2, 20 ') further comprises a pump (11, 11 ') for increasing the volume flow of the coolant provided by the coolant source (4), and the coolant flow can bypass the pump (11, 11 ') by means of a bypass (13).

2. The device according to claim 1, wherein the device comprises at least one regulating valve (9) for regulating the volume flow of the coolant flow through the line component (2, 20 '), wherein the diverting component (5, 50') is arranged downstream of the regulating valve (9).

3. The device according to claim 1 or 2, wherein the switchable diverting part (5, 50 ') comprises at least one switchable flap for directing a coolant flow into the spray beam (1) or the detour part, respectively, and/or the switchable diverting part (5, 50') performs a switching process in less than 5 s.

4. The device according to claim 3, wherein the switchable steering section (5, 50') performs a switching process in less than 1.5 s.

5. The arrangement according to claim 1, wherein a plurality of spray beams (1) are combined into a first cooling group (10) and can convey coolant to the first cooling group (10) through a first line part (20), and switchable deflection parts (50) are provided for a maximum of three spray beams (1) of the first cooling group (10) in each case in order to guide the coolant flow from the first line part (20) into a return, so that the coolant flow of a maximum of three spray beams (1) of the first cooling group (10) can be guided into the bypass part independently of the remaining spray beams of the first cooling group (10).

6. The device according to claim 5, wherein a maximum of ten spray beams (1) are combined into a first cooling group (10).

7. The arrangement according to claim 5, wherein a plurality of further spray beams (1 ') are additionally combined into a second cooling group (10') and coolant can be conveyed to the second cooling group (10 ') by means of a second line part (20'), and switchable diverting parts (50 ') are provided for a maximum of three spray beams (1') of the second cooling group (10 ') in each case for directing a coolant flow from the second line part (20') into a return, so that the coolant flow of a maximum of three spray beams (1 ') of the second cooling group (10') can be diverted into the detour independently of the remaining spray beams (1 ') of the second cooling group (10').

8. The device according to claim 7, wherein a maximum of ten further spray beams (1 ') are combined into a second cooling group (10').

9. The device according to claim 7, wherein the first and second cooling groups (10, 10') are feedable with coolant from the coolant source (4) separately from each other.

10. The device according to claim 7 or 9, wherein the volume flow of each individual cooling group (10, 10 ') can be increased independently by a pump (11, 11'), respectively.

11. The device according to claim 1, wherein the device comprises a plurality of spray beams (1) and a maximum of three spray beams (1) are provided with switchable deflection elements (5) independently of the other spray beams (1), so that a pre-accelerated coolant flow can be conveyed to the maximum of three spray beams (1) via a line element (2) or a coolant flow can be conveyed to the detour element via deflection elements (5) assigned to the maximum of three spray beams (1).

12. The device according to claim 1, wherein the device comprises a plurality of spray beams (1) and each of the spray beams (1) is provided with a switchable deflection element (5) independently of the other spray beams (1) such that a pre-accelerated coolant flow can be delivered to each spray beam (1) through a line element (2) or a coolant flow can be delivered to the detour element through a deflection element (5) assigned to the spray beam (1).

13. The device according to claim 1, wherein at least one of the spray beams (1) is carried by a support apparatus and the switchable diverting part (5) is fitted on the support apparatus; and/or the switchable diverting part (5) is located less than 5m upstream of the spray beam (1).

Technical Field

The invention relates to a device for dynamically supplying a cooling device for cooling metal strips or other rolling stock with coolant. The cooling device may particularly comprise one or more spray beams.

Background

Various systems for supplying cooling water from a high-level storage tank for laminar or pressure cooling in hot continuous rolling mills are known from the prior art. In order to cool the hot rolling stock, a considerable amount of cooling water is required in order to sufficiently and rapidly cool the strip in accordance with the requirements of the finished product. The amount of water required to achieve a given cooling rate is often on the order of hundreds or even thousands of cubic meters per second. This extremely large amount of water is transported from the high-level storage tank to the spray beam, for example, via a line system that can be throttled by a valve.

Such a system according to the prior art is exemplarily shown in fig. 1. The water stored in the coolant source 4, here an elevated storage tank, is delivered through the line 2 to a central distributor 6. Water is fed from the common distributor 6 to the individual spray beams 1 via further lines. However, this known arrangement has some disadvantages. For modern metal alloys or steels, the large cooling rates must likewise be adjustable or controllable as precisely as possible. This is however difficult to achieve due to the large amount of water used. In particular, the switching-on and switching-off processes cannot be carried out satisfactorily quickly by existing designs, which mostly include regulating valves, so that the switching-on process of the cooling often takes more than 10 seconds to achieve the desired cooling rate. However, since in many cases the rolling stock is moved through the plant at a speed of a few meters per second, a large strip length is not cooled at the desired cooling rate, with the result that the quality of this strip section is lost.

Another disadvantage is that during switching of the cooling, large forces act on the line system or the cooling device. In particular, there is a risk of damage to the cooling system by strong pressure surges during rapid switching of the supply of cooling water. Such pressure peaks can even lead to a failure of the cooling system and thus of the entire continuous rolling mill.

WO2012/011578a1 discloses a device for cooling a metal strip and a method for cooling a metal strip, the cooling device comprising a plurality of nozzle groups facing the metal strip, which are arranged in a common housing and are supplied with coolant via at least one conveying line.

In view of the prior art, the present invention has the technical object of providing an improved coolant supply device which avoids or at least significantly reduces pressure surges, in particular during switching-on. Furthermore, the technical aim can be to achieve the desired cooling rate more quickly than is currently possible, in order to supply the rolled strip with coolant in the best possible manner.

Disclosure of Invention

The technical object set forth is achieved by the features of the device according to the invention for dynamically supplying a cooling liquid to a cooling installation for cooling a metal strip or other rolling stock, in particular to at least one spray beam.

The invention relates to a device for cooling a metal strip. First, the apparatus includes a cooling device for cooling the metal strip or other product, which includes at least one spray beam having a coolant outlet for outputting coolant onto the metal strip. Further, the apparatus includes a pipe member for conveying the coolant flow from the coolant source to the spray beam, and a detour member for introducing the coolant flow from the pipe member into the return portion. The switchable deflecting part of the device is designed for switchable guiding of the coolant flow through the line part to the spray beam or for conducting the coolant flow from the line part into the bypass part.

The advantages of the device correspond substantially to those of the method already described.

In a preferred embodiment, the device can comprise at least one valve for regulating the volume flow of the coolant flow through the line component, wherein the deflecting component is arranged downstream of the regulating valve.

In a further preferred embodiment, the switchable deflecting part may comprise at least one switchable flap for directing the coolant flow into the spray beam or the bypass part, respectively.

In a further preferred embodiment, the line component also comprises a pump for increasing the volume flow provided by the coolant source. By means of such a pump, a volume flow which is accelerated more quickly can be provided.

In a further preferred embodiment, the coolant flow can bypass the pump by means of a bypass. With this arrangement, cooling can be achieved with the coolant pressure provided without this pump. The cooling water pressure may be provided, for example, by an overhead tank.

In summary, this makes it possible to provide very small volume flows (for example laminar flow operation mode) and also very large volume flows (by means of the pressure operation mode of the pump).

In a further preferred embodiment, a plurality of spray beams, preferably up to ten spray beams, are combined to form a first cooling group, wherein coolant can be supplied to the first cooling group via the first line part and switchable deflection means for guiding the coolant flow from the first line part to the return line are provided for up to three spray beams of the first cooling group, respectively, so that the coolant flow of up to three spray beams of the first cooling group can be guided separately from the remaining spray beams of the first cooling group into the bypass part or into the return line.

In a further preferred embodiment, a plurality of further spray beams, preferably up to ten further spray beams, are combined to form a second cooling group, wherein coolant can be supplied to the second cooling group via a second line part and switchable deflection means for guiding the coolant flow from the second line part to the return line are provided for at most three spray beams of the second cooling group, respectively, so that the coolant flow of at most three spray beams of the second cooling group can be guided separately from the remaining spray beams of the second cooling group into the bypass part or the return line.

In a further preferred embodiment, the first and second cooling groups can be supplied or fed with coolant separately from one another by a coolant source.

In a further preferred embodiment, the volume flow of each individual cooling group can be increased independently by means of a pump.

In a further preferred embodiment, the device comprises a plurality of spray beams, wherein each spray beam is provided with a switchable deflection element independently of the other spray beams, so that a pre-accelerated coolant flow can be supplied to each spray beam via the line element or a coolant flow can be supplied to the bypass element via the deflection element assigned to the spray beam.

In a further preferred embodiment, at least one of the spray beams is carried by a bearing device and the switchable deflecting component is fitted on the bearing device. Alternatively or additionally, the switchable diverting part is arranged less than 5m, preferably less than 3m, upstream of the spray beam.

All features of the above embodiments may be combined with each other or interchanged with each other.

Drawings

The drawings of the embodiments are briefly described below. Further details can be derived from the detailed description of the embodiments. In the drawings:

fig. 1 shows a device for supplying a plurality of spray beams with coolant (prior art);

FIG. 2 shows a schematic view of an embodiment of the device according to the invention for cooling a metal strip or other rolling stock; and

fig. 3 shows a schematic illustration of a further exemplary embodiment of the device according to the invention for cooling a metal strip or other rolling stock.

Detailed Description

Reference is first made to the prior art shown in fig. 1 for a better understanding. Depicted is an elevated storage tank used as the coolant source 4. The coolant is typically conveyed to the distributor 6 or distributor pipe via a line. From the distributor 6, the coolant can be delivered to a plurality of spray beams 1. Here, the spray beams 1 respectively comprise a plurality of outlets 7 for applying a coolant to the metal strip. As shown, a measuring sensor 15 (for example for detecting the coolant pressure or the coolant volume flow), a regulating valve 9 or a shut-off cock 8 can be arranged between the distributor 6 and the respective spray beam 1. By means of which the coolant flow directed to the respective spray beam 1 can be monitored and regulated.

Fig. 2 shows a schematic diagram according to an embodiment of the invention. The coolant is supplied by a coolant source 4, similar to the prior art according to fig. 1. In contrast to the arrangement according to fig. 1, the embodiment according to the invention of fig. 2 preferably does not comprise a distributor 6. But instead delivers coolant from the coolant source 4 to each spray beam 1 independently through the pipes 2. The coolant flow provided may be increased by the pump 11, 11' or booster pump. In addition, the coolant flow can be bypassed around the pumps 11, 11', for example by means of a bypass 13. The bypass 13 can be designed in a switchable manner, so that the coolant flow is conveyed by the pump 11, 11 ', or bypasses the pump 11, 11' and is conveyed via the line system 2 solely by the (static) pressure of the coolant supply 4. Furthermore, the volume flow can be monitored by the measuring sensor 15 and/or regulated by the regulating valve 9. The specific manner of regulation of the volume flow is however not central to the invention and can be achieved, for example, by means of known regulation techniques. The essential point is that the device according to the invention has a switchable deflecting element 5, which can divert the pre-accelerated coolant flow away from the spray beam 1. Thus, the flowing or pre-accelerated volume flow can be introduced into the return 3, for example, first. These coolant flows may, for example, then be delivered to the coolant source 4. Further treatment of the coolant is omitted, since the coolant is not contaminated when it is guided through the deflecting component 5. The diverting means 5 may typically comprise two switchable shut-off valves or shut-off taps or shut-off flaps, so that a volume flow is delivered to the spray beam 1 or the return 3. However, an arrangement with only one switchable flap is likewise possible. By means of the described arrangement, an already pre-accelerated coolant flow can be provided, which can be supplied to the spray beam 1, if required, via the deflecting element 5. The diverting member 5 can be switched, for example, by means of a sensor which registers the presence or the in-and-out of the rolled strip. Alternatively or additionally, the temperature of the rolled strip can also be monitored by means of a temperature sensor. The deflecting element 5 (regulating element) can thus preferably be switched or adjusted as a function of the temperature as a control variable in order to regulate the flow of coolant (regulating variable) to the strip via the spray beam 1 and its outlet 7.

Fig. 3 shows a schematic view of a cooling device according to another embodiment of the invention. In contrast to the arrangement shown in fig. 1, a plurality of spray beams 1 are combined to form a first cooling group 10 and further spray beams 1 'are combined to form a second cooling group 10'. Inside each cooling group 10, 10 ', each individual spray beam 1, 1 ' (upstream) is provided with a steering device 50 ', 50. That is to say, a pre-accelerated volume flow can be supplied to each spray beam 1, 1 'via the assigned deflection element 50, 50'. The diverting members 50, 50 'are preferably located as close as possible to the spray beams 1, 1', respectively, to be supplied with coolant, so that the time required for the volume flow in the section between the location diverted by the diverting member 5 and the spray beam is kept short, whereby the reaction speed and the adjustability of the system are considerably improved.

The steering element 5, 50' can be switched, for example, electrically, pneumatically or hydraulically.

The above examples are mainly for a better understanding of the invention and are not to be construed as limiting. The scope of protection of this patent application is given by the claims.

The features of the described embodiments can be combined with each other or interchanged with each other.

Furthermore, the skilled person can adapt the described features to the existing conditions or the existing requirements.

List of reference numerals

1 spray Beam

1' spray Beam

2 pipeline parts

3 reflux part

4 source of coolant

5 steering component

6 distributor

7 coolant outlet of spray beam

8-off cock

9 regulating valve

10 first cooling group

10' second cooling group

11 Pump

11' pump

13 bypass

15 measuring sensor

20 first pipeline component

20' second pipeline component

50 switchable first steering component

50' switchable second steering component