CN201375992Y

CN201375992Y - Cooling device

Info

Publication number: CN201375992Y
Application number: CN200920069186U
Authority: CN
Inventors: 王军; 李华明
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2009-03-20
Filing date: 2009-03-20
Publication date: 2010-01-06
Anticipated expiration: 2019-03-20

Abstract

The utility model discloses a cooling device, which comprises a collecting tube and two overflow plates, wherein the collecting pipe is fixedly arranged vertically to the running direction of band steel; a water inlet pipe is arranged in the middle of the bottom part of the collecting pipe; a plurality of spray pipes are arranged on the collecting pipe and are uniformly distributed at the upper part of the collecting pipe of the cooling device; and the two overflow plates are symmetrically arranged in the collecting pipe and are tilted downward to the middle part of the two ends of the collecting pipe. The cooling device can effectively control the laminar cooling flow rate along the width direction, saves large amount of water, and saves production resources.

Description

A kind of cooling device

Technical field

The utility model relates to a kind of cooling device, relates in particular to a kind of cooling device that is applicable to control width laminar flow cooling flow on the metallurgical steel rolling production-line.

Background technology

The hot rolling tandem mill production line of iron and steel enterprise all will use cooling facility for laminar flow both at home and abroad, and its major function is exactly the band steel with the finish rolling outlet, cools off fast according to the target temperature that batches setting, to guarantee the properties of product of band steel.

With the hot rolling mill is example, and its cooling facility for laminar flow has 76 groups of cooling manifolds (correspondence is a group up and down).Wherein preceding 68 groups is strong cold section and main cold section, and the back is a fine cold-leg for 8 groups.Generally be divided into several cooling zones, each cooling zone all has cold section cooling zone serial connection with fine cold-leg of master separately to form, and the master of cooling zone is made of some groups strong cold collector groups and the some groups of cold collector groups of master again for cold section.The cold model of layer calculate required when opening collector valve group, according to main cold section from front to back, fine cold-leg rule is from back to front set.Therefore,, all need open in each setting, therefore be in normally open basically for back 4 groups of main cold section preceding 4 groups and fine cold-leg to the setting temperature drop of coiling temperature according to finishing temperature; Basic automatization all needs to follow the tracks of for the position of band steel on the laminar flow roller-way in addition.Its cooling control is as follows:

At first, the process machine calculates by the cold model of layer according to finishing temperature and the coiling temperature set, and that determines main cold section and fine cold-leg cooling manifold opens the group number, and under send instructions and water valve controlled to the finish rolling basic automatization.

Secondly, after the band steel goes out the last frame of finish rolling temperature measurer measures the finishing temperature of band steel reality after by finish rolling, again the group number of opening of cooling manifold is regulated accordingly.

At last, after the batching temperature measurer and measure the actual coiling temperature of band steel after layer is cold, dynamically the laminar flow cooling manifold is opened the group number and regulates according to the desired value of setting of batching, with the coiling temperature that guarantees the band steel in setting range.It is 5 degree that the cooling water inflow of each valve group can be controlled belt steel temperature.

Cool off fast according to the target temperature that batches setting, also can cause some negative influences simultaneously to the properties of product of band steel, for example to influence of belt plate shape and strip edge portion quality etc., from plant maintenance and adjustment ground angle, cause the factor of negative effect to mainly contain 2: 1, not have special-purpose collector chilled water instrument, rely on the range estimation error bigger; 2, no isolated plant is dynamically followed the tracks of the collector chilled water.

Hot Strip shape is the quality problems of users' special concern always, the good and bad use that directly influences product of strip shape quality, especially in recent years along with the fast development of steel and iron industry, the belt steel product application is constantly expanded, and the user also improves day by day to the requirement of its strip shape quality.

As shown in Figure 1, existing laminar cooling system comprises a collector 1 ', a water inlet pipe 2 ', some jet pipes 3 ', and the water yield of each jet pipe 3 ' is identical, has caused width flux density as shown in Figure 2 to distribute 4 '.

Continuous expansion and user's improving constantly along with the rolling line rolling specs to the product quality requirement, can not satisfy the needs that the part steel grade is produced, more especially contain the strength steel (as: BS600, BS700, B510L, S45C, SS400 etc.) of alloying element.These strength steel are after process laminar flow cooled region, as shown in Figure 2, because existing laminar cooling system exists the hydraulic pressure shakiness, problems such as current skewness cause the inhomogeneous cooling of band steel, thereby cause being with steel a series of strip shape quality problems to occur, in the rolling line production process, repeatedly find the band steel because the C that inhomogeneous cooling causes sticks up, the plate deformationization that causes with the width inhomogeneous cooling, especially the reduction of limit portion temperature produces the internal stress of bringing bilateral unrestrained trend than conference in follow-up cooling procedure, gives the plate shape of band steel, mechanical performance, temperature and phase transformation all can bring very big influence in the uniformity of width.

For this reason, Kawasaki Steel Corp. applies for a patent " cooling means of sheet metal strip and device " (open day 1987.12.16 of application in China, number of patent application CN87100594), its cooling facility for laminar flow adopts the laminar flow jet pipe of being made up of the flat board member of a pair of qualification slit, cooling water flows through this slit and forms a cooling water screen. for regulating the passage area in this jet pipe, the flat board member of this laminar flow jet pipe has at least one can be out of shape on perpendicular to the direction of flow of cooling water, have at least a flat board to respond cooling water pressure preferably, cause that passage area changes, thereby regulate the cooling-water duct zone.The method adopts the method to laminar flow cooling manifold edge-masking, strip edge portion temperature is reduced big problem provides a solution, but also there is weak point in this method, promptly when producing than ribbon steel, a large amount of cooling waters waste, and are unfavorable for the saving of the resources of production.

Existing laminar flow cooling is mostly adopted the water inlet of limit portion with collector, if water inlet end is at transmission side, laminar cooling water water flows to active side from transmission side, and pressure will inevitably produce linear loss, and therefore, transmission side pressure will be higher than fore side comparatively speaking.We utilize the infrared temperature imager that the cooled band steel of laminar flow is carried out temperature scanning on the width, we can see the Temperature Distribution of whole width, the temperature of two limit portions is middle relatively to be lower, this relative middle part of strip edge portion current of seeing with our scene is relatively concentrated and is matched, and, the band steel is after rolling, and the heat radiation of limit portion is bigger with respect to the middle part, can aggravate the generation of this phenomenon.In addition,, also have a fore side to be higher than the trend of transmission side generally, belong to the linear loss build-up of pressure fluctuation of laminar cooling water from the temperature of strip width direction.

Obviously, the shortcoming of this prior art is:

1, width laminar flow cooling flow can not be controlled effectively.

2, a large amount of cooling waters waste when producing, and are unfavorable for the saving of the resources of production.

Summary of the invention

The purpose of the utility model application is at laminar cooling system the strip width direction to be existed cooling phenomenon pockety, a kind of collector device by control width laminar flow cooling flow is provided, alleviate the bigger difference of band steel, guarantee with plate shape, mechanical performance, temperature and the phase transformation of steel uniformity at width at limit portion width.

In order to achieve the above object, a kind of cooling device of the present utility model comprises: a collector, fixedly install along belt steel traffic direction, and be provided with water inlet pipe in the middle of its bottom, described collector is provided with some jet pipes, is distributed in cooling device collector top, also comprises:

Two overflow plates are symmetricly set in the described collector, and downward-sloping toward the centre from the two ends of collector.

Preferably, comprise that also one crosses bridging beam, be arranged on collector top, this is crossed bridging beam and is provided with some through holes, and described jet pipe is communicated with through hole respectively.，

Preferably, have a counterbore in the described through hole, described jet pipe is rigidly attached in the counterbore.

Preferably, the water inlet of described jet pipe is provided with a throttle.

Preferably, the bore of described throttle is successively decreased to both sides by the middle part of collector.

Preferably, described jet pipe is following spray gooseneck.

Preferably, described jet pipe is staggered, the both sides along collector are bent downwardly extension respectively.

The utility model makes it compared with prior art owing to adopted above technical scheme, has the following advantages and good effect:

1. can effectively control width laminar flow cooling flow.

2. save a large amount of cooling waters, saved the resources of production.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.

In the accompanying drawings:

Fig. 1 is the prior art constructions schematic diagram.

Fig. 2 is the width flux density distribution schematic diagram of prior art.

Fig. 3 is a structural representation of the present utility model.

Fig. 4 is the structural representation after the collector area of Fig. 3 reduces.

Fig. 5 is that Fig. 3 A-A is to cutaway view.

Fig. 6 is that Fig. 3 B-B is to cutaway view.

Drawing reference numeral:

[1 '] collector [2 '] water inlet pipe [3 '] jet pipe [4 '] flux density distributes

[1] collector [2] water inlet pipe [3] jet pipe [4] overflow plate

[5] cross bridging beam [6] through hole [7] counterbore [8] throttle

The specific embodiment

Specifically introduce two kinds of preferred embodiments of the present utility model below in conjunction with accompanying drawing 1-6.

As Fig. 3, shown in Figure 5, present embodiment is fixed on the band steel traffic direction, and the middle part of collector 1 connects water inlet pipe 2, supplies water uniform some jet pipes 3 on the collector 1 to collector 1.The both sides of collector 1 inner inlet pipe 2 are provided with that 4, two overflow plate 4 relative inner of two overflow plates are low, highland, the outside is obliquely installed, and their are near the water inlet of two lateral jet pipes 3.Distance between the water inlet of jet pipe 3 and the overflow plate 4 is successively decreased to both sides by the middle part of collector 1.Cross bridging beam 5 and be arranged on collector 1 top, this is crossed bridging beam 5 and is provided with some through holes 6, described jet pipe 3 respectively with through hole 6 in counterbore 7 rigidly fix and be communicated with.The water inlet of described jet pipe 3 is provided with a throttle 8, and the bore of throttle 8 is successively decreased to both sides by the middle part of collector 1.

Shown in Fig. 5,6, jet pipe 3 is following spray goosenecks, and jet pipe 3 is staggered, the both sides along collector 1 are bent downwardly extension respectively.Collector 1 top shown on Fig. 6 was bridging beam 5, crossed the through hole 6 on the bridging beam 5, the counterbore 7 in the through hole 6.Throttle 8 on the water inlet of jet pipe 3.

As shown in Figure 4, present embodiment can also be removed the part area of collector 1 beyond two overflow plates 4, further reduces the weight and the economical with materials of collector 1 with this.Water inlet pipe 2 is positioned in the middle of the collector 1 on the figure, and jet pipe 3 is positioned at two overflow plates 4, crosses bridging beam 5 above collector 1.

Because overflow plate 4 is very near with the water inlet distance of edge jet pipe 3, so can influence the inflow velocity of water in the edge jet pipe 3, make the water yield of the jet pipe 3 from the middle part to both sides successively decrease successively, reach the purpose of control width laminar flow cooling flow with this.Simultaneously, the throttle 8 that successively decreases to the both sides bore from the centre has also determined also successively decreasing from the centre to the both sides bore of jet pipe 3 inflows.So, under the mating reaction of these two kinds of parts, present embodiment can be effectively, control width laminar flow cooling flow, avoided occurring flow excessive shortcoming in prior art both sides among Fig. 2, prevent from the rolling line production process to find the band steel because the plate deformationization that C sticks up and the width inhomogeneous cooling causes that inhomogeneous cooling causes, guarantee with plate shape, mechanical performance, temperature and the phase transformation of steel uniformity at width.

Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.

Claims

1. cooling device, comprising: a collector (1) fixedly installs along belt steel traffic direction, be provided with water inlet pipe (2) in the middle of its bottom, described collector (1) is provided with some jet pipes (3), is distributed in cooling device collector (1) top, it is characterized in that also comprising:

Two overflow plates (4) are symmetricly set in the described collector (1), and downward-sloping toward the centre from the two ends of collector (1).

2. cooling device as claimed in claim 1 is characterized in that also comprising: one crosses bridging beam (5), is arranged on collector (1) top, and this is crossed bridging beam (5) and is provided with some through holes (6), and described jet pipe (3) is communicated with through hole (6) respectively.

3. cooling device as claimed in claim 2 is characterized in that: have a counterbore (7) in the described through hole (6), described jet pipe (3) is rigidly attached in the counterbore (7).

4. as any described cooling device among the claim 1-3, it is characterized in that: the water inlet of described jet pipe (3) is provided with a throttle (8).

5. cooling device as claimed in claim 4 is characterized in that: the bore of described throttle (8), successively decreased to both sides by the middle part of collector (1).

6. cooling device as claimed in claim 5 is characterized in that: described jet pipe (3) is following spray gooseneck.

7. cooling device as claimed in claim 6 is characterized in that: described jet pipe (3) is staggered, the both sides along collector (1) are bent downwardly extension respectively.