CN205236625U - Shaped steel cooling device - Google Patents
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- CN205236625U CN205236625U CN201521015653.3U CN201521015653U CN205236625U CN 205236625 U CN205236625 U CN 205236625U CN 201521015653 U CN201521015653 U CN 201521015653U CN 205236625 U CN205236625 U CN 205236625U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 103
- 239000010959 steel Substances 0.000 title claims abstract description 103
- 238000001816 cooling Methods 0.000 title claims abstract description 97
- 238000005098 hot rolling Methods 0.000 abstract description 7
- 238000005452 bending Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- 238000000034 method Methods 0.000 description 20
- 238000005096 rolling process Methods 0.000 description 9
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- 239000000463 material Substances 0.000 description 8
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- 239000000047 product Substances 0.000 description 5
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- 229910001563 bainite Inorganic materials 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
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- 230000002411 adverse Effects 0.000 description 1
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Abstract
The utility model discloses a shaped steel cooling device belongs to hot rolling steel cooling field, including cold bed factory building and cold bed, its characterized in that: the cold bed entry and the cold bed exit of cold bed factory building are equipped with entry foundation ditch and export foundation ditch, and the top of cold bed factory building is equipped with the ventilator, strong air -cooler is installed to the below of cold bed, outside entry foundation ditch and export foundation ditch all stretched out the cold bed factory building, the entry foundation ditch communicated with each other through foundation ditch below the cold bed with the export foundation ditch, entry foundation ditch length, the degree of depth be less than the export foundation ditch respectively, the foundation ditch is the echelonment, rank and entry foundation ditch level are gone up to lower rank and export foundation ditch level. Compared with the prior art have the cooling rate height, the shaped steel skin cooling is even, characteristics that the bending deformation is little.
Description
Technical field
The utility model relates to a kind of hot-rolled steel cooling device, particularly one and is applicable to shaped steel, and especially H shaped steel carries out air-cooled cooling device.
Background technology
Shaped steel is a kind of bar structural section that has certain section shape and size, is one of large kinds of steel four (plate, pipe, type, silk). According to section configuration, shaped steel divides simple shape and compound section shaped steel, and the latter claims again deformed steel, comprises that the latter refers to H shaped steel, channel-section steel, rail, casement section steel, bending shaped steel etc., and the flat-bulb steel used of shipbuilding. Complicated shaped steel obtains preparation method and is divided into again two kinds of welding and hot rollings, and the former exists intensity defect, so current hot-rolled steel section application surface is more extensive.
The final temperature of hot rolling is generally 800～900 DEG C, needs to be afterwards cooled to 80 DEG C of left and right, according to cooling medium difference, and cooling air cooling, oil cooling, air-cooled, water-cooled etc. of being divided into. The control main points of process for cooling are cooling velocities, and above-mentioned cooling velocity water-cooled is the fastest, and air cooling is the slowest, and oil cooling, air-cooled between between the two. Cooling velocity and cooling means can cause the fluctuation of steel microstructure and property: in order to obtain superior function, take to force cooling provision after finish to gauge, make the grain refinement of steel, delivery steel have higher comprehensive mechanical property. The cold and hot roll process of control is applied to wire rod hot rolling more at present, for complicated shaped steel hot rolling, forces cooling easy steel tissue and the cross sectional shape thereof of affecting, and causes end product quality defect. Pressure is cooling fast can increase steel performance, burial pit insulation slow cooling can reduce the cooling deformation effect bringing, cooling velocity and the cooling contradiction of deformation between these two of bringing are difficult points maximum in complicated shaped steel hot rolling process for cooling, and this contradiction is outstanding especially in the larger rail section of specification is produced.
In addition, when needing to be cooled to uniform temperature in process of production, shaped steel just can carry out straightening processing, and not in time cooling, can cause being forced to slow down the speed of production of shaped steel.
In order to alleviate this contradiction, solve the problem of slow cooling cold bed nature cooling capacity deficiency, current usual technique can directly adopt the type of cooling of spraying or water spray conventionally on cold bed, cooling in the hope of accelerating, but this kind of technique can not address the above problem, still there is following defect: the cooling meeting of 1. spraying water makes complicated shaped steel due to inhomogeneous cooling, thereby occurs Bending Deformation; 2. water smoke is attached to shaped steel surface, easily makes shaped steel produce corrosion; 3. because steam in cooling procedure can not be discharged in time, thereby the driving of cold bed region and steel construction are caused to corrosion; 4. water resource can not centralized recovery, causes the significant wastage of water resource.
In order to reduce the adverse effect brought of water spray, Some Enterprises is also attempted to carry out coolingly with air-cooled, still because common air-cooled cooling velocity is slow compared with water-cooled, has limited the production efficiency of product. And commonly singlely air-cooledly still can cause Bending Deformation, and after air-cooled strength increase, the external environment temperature difference is larger, the institutional framework of having aggravated steel inside is unstable.
Therefore, with regard to need a kind of can to shaped steel carry out fast cooling, improve shaped steel cooling uniformity, improve the cooling device of shaped steel production efficiency.
Utility model content
Technical assignment of the present utility model is for above the deficiencies in the prior art, and a kind of shaped steel cooling device is provided, and to strengthening cooling velocity, improves steel production efficiency, and can not bring deformation defect.
The technical scheme in the invention for solving the technical problem is: a kind of shaped steel cooling device, comprise cold bed factory building and cold bed, it is characterized in that: the cold bed entrance of described cold bed factory building and cold bed exit are provided with entrance foundation ditch and outlet foundation ditch, and the top of cold bed factory building is provided with ventilator; The below of cold bed is provided with strong air-cooler; Entrance foundation ditch and outlet foundation ditch all stretch out outside cold bed factory building, and entrance foundation ditch communicates by cold bed below foundation ditch with outlet foundation ditch; Described entrance foundation ditch length, the degree of depth are less than respectively outlet foundation ditch, and foundation ditch is stepped, lower rank and outlet foundation ditch level, upper rank and entrance foundation ditch level.
The width of above-mentioned foundation ditch is more than or equal to the width of cold bed.
Above-mentioned strong air-cooler and ventilator are multiple, multiple ventilator are linear array, and the linearly aligned width of ventilator is consistent with cold bed width, described multiple strong air-cooler is linear array, the strong linearly aligned width of air-cooler is consistent with cold bed width, and the air flow energy that the spacing of adjacent two powers' air-cooler can make two powers' air-cooler blow to cold bed intersects mutually.
Above-mentioned strong air-cooler and ventilator number are equal, and the angle between air outlet and the ventilator of strong air-cooler is 15 °～20 °.
/ 3rd places after above-mentioned strong air-cooler is arranged in cold bed.
Compared with prior art, the utlity model has following outstanding beneficial effect:
1, the design of foundation pit that adopts two ends, makes air enter cold bed by the foundation ditch at the two ends of cold bed factory building, and cold and hot air forms strong convection in motion process, realizes basic air-cooled.
2, cooling without using water smoke to carry out shaped steel, therefore shaped steel and the driving of cold bed region and steel construction non-corroding phenomenon occur.
3, control coldly by pressure, promote rate of temperature fall, reduce hot rolling to the time loss between correcting, improve steel production efficiency, can meet extensive high-speed production throughput requirements.
4, ladder air cooling technology, although cooling rate cream, shaped steel surface cool is even, flexural deformation is little.
Brief description of the drawings
Fig. 1 is the side-looking structural representation of the utility model comparative example.
Fig. 2 is the side-looking structural representation of the utility model embodiment 1.
Fig. 3 is the side-looking structural representation of the utility model embodiment 2.
Fig. 4 is the structural representation of condensation comb part in the utility model embodiment 2.
Fig. 5 is the BD1 operation of rolling schematic diagram of the utility model embodiment 3.
Fig. 6 is the utility model embodiment 3BD2, DRDFOperation of rolling schematic diagram.
Fig. 7 is that the utility model embodiment 3 is through BD2 rolling gained material template portion schematic cross-section.
Detailed description of the invention
Below in conjunction with specification drawings and specific embodiments, the utility model is further illustrated.
For the ease of narration, be as the criterion to walk steel direction, it is front entering steel direction, tapping is after direction is.
Comparative example (conventional air-cooled group): for Q235B and Q345B, specification is: 500 × 200 × 10 × 16mm.
As shown in Figure 1, take conventional air cooling device, the below of cold bed 6 is provided with a plenum chamber 16, on described plenum chamber 16, is provided with many gap-shapeds spout 17, and the width of seam shape spout 17 is consistent with the width of cold bed 6. In the time that the air inlet to plenum chamber 16 passes through air blast input air, air is discharged by seam shape spout 17 through plenum chamber 16, and air draught directly blows on the surface of H shaped steel and carries out cooling to it. Adopt 950 DEG C of the reference examples of above-mentioned conventional air cooling way to be down to 80 DEG C, cooling velocity is 14.75 DEG C/min.
Embodiment 1 (air blast cooling group): for Q235B and Q345B, specification is: 500 × 200 × 10 × 16mm.
As shown in Figure 2, the cold bed entrance 1 of cold bed factory building 2 and cold bed export 7 places and are respectively equipped with entrance foundation ditch 31 and outlet foundation ditch 37, the width of foundation ditch is more than or equal to the width of cold bed 6, entrance foundation ditch 31 and outlet foundation ditch 37 all stretch out outside cold bed factory building 2, and entrance foundation ditch 31 communicates with cold bed 6 below foundation ditches 3 with outlet foundation ditch 37. The top of cold bed factory building 2 is provided with one or more ventilator 4, as is multiple, and multiple ventilator 4 are linear array, and the linearly aligned width of ventilator 4 is consistent with cold bed 6 width. The below of cold bed 6 is provided with one or more strong air-coolers 5, multiple strong air-coolers 5 are linear array, the strong linearly aligned width of air-cooler 5 is consistent with cold bed 6 width, the air flow energy that the spacing of adjacent two powers' air-cooler 5 can make two powers' air-cooler 5 blow to cold bed 6 intersects mutually, can not produce dead angle, thereby can avoid H shaped steel inhomogeneous cooling. Strong air-cooler 5 and ventilator 4 numbers are equal, and position is moved towards to settle according to hot-air. What in prioritization scheme, use is multiple strong air-coolers 5 and multiple ventilator 4, quantity and spacing is relevant according to cold bed 6 length, strong air-cooler 5 and ventilator 4 parameters and steel to be cooled, but in order better to show in the accompanying drawings airflow direction, a pair of strong air-cooler 5 and ventilator 4 in accompanying drawing, are only drawn. After strong air-cooler 5 is arranged in cold bed 6 near 1/3rd places, specifically distributes in cold bed 6 after centered by 1/3rd boundaries, total distributed is apart from being no more than cold bed length 1/4th. In the present embodiment, strong air-cooler 5 parameters are inlet and outlet diameter 1000mm, 36916 cubes ms/h of air quantity, blast 371 handkerchiefs, the 1.5 meters of left and right of spacing between two strong air-coolers 5. Strong air-cooler 5 air-out directions are towards entering steel direction, so that the cold wind that strong air-cooler 5 is produced blows to the top portion ventilation device 4 of described cold bed factory building 2, and guide air flow direction ventilator 4 places in whole cold bed 6th district with this.
In the present embodiment, described entrance foundation ditch 31 length, the degree of depth is less than respectively outlet foundation ditch 37. Air enters cold bed 6 by the foundation ditch at the two ends of cold bed factory building 2: it is air-cooled that entrance foundation ditch 31 inlet airs carry out basis, and heat absorption is risen, and is got rid of by cold bed 6 top ventilator 4, constantly attracts cold wind to enter from foundation ditch; Entrance foundation ditch 31 is relatively shallow, and inner without the design of turning back of pillar and bottom surface, its reason is that the temperature of porch steel is the highest, and air need to be taken away rapidly heat, but this section again can not be cold excessively by force, the initially too high steel product performance that affects of cooldown rate; Outlet foundation ditch 37 is long darker, and its object is to guarantee to enter the temperature of cold wind, and it is air-cooled that lower temperature air intake is realized basis on the one hand, realizes air blast cooling on the one hand by strong air-cooler 5. Angle between air outlet and the ventilator 4 of strong air-cooler 5 is 15 °～20 °, and this angle has considered the ascension of hot-air, guarantees high efficiency flow. Entrance foundation ditch 31 communicates into foundation ditch 3 with outlet foundation ditch 37 by cold bed 6 belows, foundation ditch 3 presents stepped, lower rank and outlet foundation ditch 37 levels, upper rank and entrance foundation ditch 31 levels, and have multiple pillars in 6 times foundation ditches 3 of cold bed, the object of described pillar is to make cold air to form multinomial turning back at foundation ditch place, increase cooling effect, rise while exceeding cold bed 6 level to uniform temperature when cold air absorbs heat, can reach rapidly from ventilator 4 loss. In the concrete optimal design of implementing, foundation ditch 3 is can bottom surface uneven, is preferably many grooves vertical with walking steel direction. Its object is also: a part of high wind runs into steel to be stopped and be refracted back in foundation ditch, be refracted to hotter steel section by groove, realization circulates, blending mutually, make temperature be tending towards even, and motion process, form strong convection from entrance foundation ditch 31 and two strands of air that enter factory building from outlet foundation ditch 37, and got rid of by cold bed factory building 2 top ventilator 4, two strands of air are in convection process, hotter air rises, colder air declines, the great like this speed that has improved air and take away heat. The blend stop of laterally turning back is installed in the foundation ditch 3 of three/part after cold bed 6.
The concrete preferred parameter of the present embodiment is: cold bed 6 length are 40000mm, and entrance foundation ditch 31 stretches out the outer 5500mm of factory building, and outlet foundation ditch 37 stretches out the outer 9000mm of factory building. In the specific implementation, need be according to die to be cooled, cooling requirements etc. carry out parameter adjustment.
The feature of embodiment 1 is that simple in structure, H shaped steel is directly down to 80 DEG C by 950 DEG C in cooling procedure, can at the uniform velocity advance, without cooling stage by stage. H shaped steel average cooling rate is about 21.75 DEG C/min. The utility model adopts two ends design of foundation pit and ladder air cooling technology, and air enters cold bed by the foundation ditch at the two ends of cold bed factory building, and in cold bed 6, rear 1/3rd intersections arrange strong air-cooler 5. Cold bed 6 first three/air enters from shallow, short entrance foundation ditch 31, without turning back design, rapidly and high hot steel carry out heat exchange, hot-air is overflowed from ventilator 4 rapidly; In cold bed 6,1/3rd realize air blast cooling by strong air-cooler 5, and repeatedly turn back by pillar and bottom grooves, increase heat exchange usefulness, and fully overflow from ventilator 4 in heat exchange rear; After cold bed 6,1/3rd air enter from dark, long outlet foundation ditch 37, and the design of laterally turning back, carries out reducing temperature twice for the steel that carry out strong cold cooling. Use this kind of type of cooling, cooling velocity promotes, and under steel, the poker temperature difference of cold bed is less than 10 DEG C, thereby has ensured, in increasing cooldown rate, to have ensured cooling uniformity.
Embodiment 2 (mixing air-cooled group): for Q235B and Q345B, specification is: 500 × 200 × 10 × 16mm.
As shown in Figures 3 and 4, the setting of cold bed 6, entrance foundation ditch 31 and outlet foundation ditch 37, foundation ditch 3, ventilator 4 and strong air-cooler 5 is with embodiment 1.
In addition, condensation comb 9 is laid in cold bed 6 stage casings and back segment front portion (controlling cold section) top, and the water inlet of condensation comb 9 is connected with the delivery port of cistern 10 by water pump 12. In H shaped steel air blast cooling process, because cold bed 6 belows are provided with strong air-cooler 5, so in cooling procedure, the regional temperature up and down of H shaped steel exists larger temperature difference. By interior condensation comb 9 injection cold water, thereby reduce the temperature difference in the upper and lower region of H shaped steel. Cold bed 6 front end tops are provided with pressurized water tubes 8, the water inlet of described pressurized water tubes 8 is connected with the delivery port of condensation comb 9 by booster, the delivery port of pressurized water tubes 8 is connected with the water inlet of cistern 10 by overflow valve 11, multiple linearly aligned atomizers 14 that are are installed in pressurized water tubes 8, and atomizer 14 can be to cold bed 6 stage casing shaped steel upper horizontal to spraying pressurization water smoke. Because the water inlet of pressurized water tubes 8 is the water with uniform temperature after 9 heat exchange of condensation comb, and go out mist direction and cold bed 6 levels, and the water smoke spraying is easy to be evaporated into steam, take away a part of heat, the air-flow that the strong air-cooler 5 of quilt and ventilator 4 produce is from ventilator 4 runaways, thereby can make the temperature of top, the front stage casing of cold bed 6 decline, and there will not be again water to fall. Because water does not contact steel body and cold bed 6, therefore there will not be the defect of water-cooled, pollute rustization. H shaped steel temperature gradient diminishes like this, and thermal stress is little, and structural stress is little, thereby avoids causing the flexural deformation of H shaped steel. Overflow valve 11 can be stablized the pressure of pressurized water tubes 8, when the pressure in pressurized water tubes 8 excessive, when water cannot spray from atomizer 14 in time, the outlet of overflow valve 11 is opened, water is entered to cistern 10, when the pressure decreased in pressurized water tubes 8 is during to desirable value, the port closing of overflow valve 11, thus reach the object of stablizing the pressure in pressurized water tubes 8.
Use above design, the average cooling rate of H shaped steel is about 29 DEG C/min. H shaped steel is directly down to 80 DEG C by 950 DEG C in cooling procedure, without cooling stage by stage. Owing to laying condensation comb 9 above cold bed 6H shaped steel, make H shaped steel temperature field in the process of cooling more even, thereby make all there is significantly raising in upper lower flange and web yield strength, the tensile strength everywhere of H shaped steel.
Under same die, be down to 80 DEG C for 950 DEG C, pass through comparative example, embodiment 1 and embodiment 2 data comparisons, the cooling velocity of three groups is respectively 14.75 DEG C/min, 21.75 DEG C/min, 29 DEG C/min, can find out: embodiment 1, embodiment 2 all can realize the cooling fast of H shaped steel, and, embodiment 2 is than the better ideal of embodiment 1 cooling effect, and embodiment 2 by laying condensation comb 9 above H shaped steel, thereby reduce the temperature difference between the upper and lower region of H shaped steel and web and the edge of a wing, reduce the thermal stress between web and the edge of a wing, avoid causing web bending, make H shaped steel temperature field in the process of cooling more even, mean grain size and the average yield strength of H shaped steel are improved.
Embodiment 3: cooling for flat-bulb steel, the concrete steps of the integral production technique of flat-bulb steel are as follows:
(1) first blooming mill (BD1) rolling: after rectangular bloom heating, through BD1, rectangular bloom is spreaded as flat blank, it spreads process for first extrude groove on slab, then the boss on groove side is flattened. By subregion rolling, reduce rolled piece and extend, increase is spreaded, and absolute spread, than adopting conventional spreading can have more 30%, can use less power can make slab fully spread simultaneously like this, is applicable to spreading the slab of large specification. As shown in Figure 5, the present embodiment BD1 rolling specifically comprises 7 passages: the 1st passage, extrudes respectively twice groove at slab upper and lower surface; The 2nd passage, flattens the boss between described twice groove; The 3rd passage, flattens the boss of described twice groove both sides; The 4th passage, extrudes respectively groove one in the centre of slab upper and lower surface; The 5th passage, depresses described groove both sides boss; The 6th passage, 90-degree rotation, carries out edging; The 7th passage, 90-degree rotation, spreads again. Absolute spread is than adopting conventional spreading can have more 30% like this. In addition, other can be spreaded rectangular bloom also can use for the mode of flat blank and pass design by BD1.
(2) second blooming mills (BD2) rolling: as shown in 1～4 of Fig. 6, through BD2, the flat blank of step 1 gained is rolled into symmetrical material type, these material type two ends are thick, intermediate thin. Thick end, two ends is in order to form " bulb " of flat-bulb steel, and the board of intermediate thin is in order to form " web " of flat-bulb steel. Middle board presents " waveform ", and as shown in Figure 7, it is symmetrical that described waveform presents bilateral with mid point. For the ease of narration, taking Fig. 7 up and down as narration direction, in prioritization scheme, described " waveform " is discontinuous sine curve, formed by four crests and three troughs: four described crests comprise two large crests 22 and two small echo peaks 21, two described large crests 22 are positioned at board mid point both sides, between two large crests 22, form small echo paddy 24, and the lowest point of described small echo paddy 24 is board mid point; Two described small echo peaks 21 are positioned at end and board joint, between the small echo peak 21 of described homonymy and large crest 22, are large trough 23, and above curve waveform design sense is to utilize radian poor, makes at DRDFIn the operation of rolling, extend ratio everywhere and equate, thereby can ensure flat-bulb steel web, mechanical property is all equal everywhere.
(3) two tandem two-roller mill (DRDF) rolling: as shown in 5～8 of Fig. 6, through DRDF" waveform " material type is rolled into just material, described first material comprises the flat-bulb steel that two symmetrical webs are connected, wherein there is a depression two Axisymmetric Spherical band steel web junctions, and recess thickness is less than the thickness at flat-bulb steel web place, and on two Axisymmetric Spherical band steel webs, angle is less than 180 °. The formation of its depression can be: in the middle of the finished product lower roll groove of this milling train, process the boss matching with described depression, shut out the sunk part of junction by this boss, also can complete the pass design that it is recessed to form for any. In prioritization scheme, junction thickness is 3mm in the middle of flat-bulb steel, and every flat-bulb steel web and horizontal line angle are 3 °. By sunk structure, flat-bulb steel can more easily be cut open, and ensure split surface quality.
(4) the air-cooled Compound cooling of air cooling: in step 3, gained just expects that entering cold bed factory building 2 carries out cooling, described cold bed factory building 2, comprise cold bed 6, foundation ditch, ventilator 4 and strong air-cooler 5, the cold bed entrance 1 of cold bed factory building 2 and cold bed export 7 places and are respectively equipped with entrance foundation ditch 31 and outlet foundation ditch 37, entrance foundation ditch 31 and outlet foundation ditch 37 all stretch out outside cold bed factory building 2, and described entrance foundation ditch 31 length, the degree of depth is less than respectively outlet foundation ditch 37. Entrance foundation ditch 31 communicates with cold bed 6 below foundation ditches 3 with outlet foundation ditch 37, foundation ditch 3 presents stepped, lower rank and outlet foundation ditch 37 levels, upper rank and entrance foundation ditch 31 levels, and in 6 times foundation ditches 3 of cold bed, there are multiple pillars, the blend stop of laterally turning back is installed in the foundation ditch 3 of three/part after cold bed 6. The top of described cold bed factory building 2 is provided with ventilator 4, the below of cold bed 6 is provided with strong air-cooler 5, / 3rd intersections after strong air-cooler 5 is arranged in cold bed 6, strong air-cooler 5 air-out directions are towards entering steel direction, so that the cold wind that strong air-cooler 5 is produced blows to the top portion ventilation device 4 of described cold bed factory building 2, and guide air flow direction ventilator 4 places in whole cold bed 6th district with this. Flat-bulb steel in this step just material is directly down to 80 DEG C by 950 DEG C in cooling procedure, can at the uniform velocity advance, without cooling stage by stage. Adopt two ends design of foundation pit and ladder air cooling technology, air enters cold bed 6 by the foundation ditch at the two ends of cold bed factory building 2: entrance foundation ditch 31 air naturals enter that to carry out basis cooling, cold air heat absorption is risen, and is got rid of by cold bed 6 top ventilator 4, constantly attracts cold wind to enter from foundation ditch; Entrance foundation ditch 31 is relatively shallow, inner without the design of turning back of pillar and bottom surface, its reason is that the temperature of porch steel is the highest, air need to be taken away rapidly heat, but this section again can not be cold excessively by force, initial cooldown rate too high Wei Shi soma and bainite structure form in a large number, affect steel product performance. In cold bed 6,1/3rd realize air blast cooling by strong air-cooler 5, angle between air outlet and the ventilator 4 of strong air-cooler 5 is 15 °～20 °, this angle has considered the ascension of hot-air, guarantee high efficiency flow, and repeatedly turn back by pillar and bottom grooves, increase cooling effect, heat exchange usefulness, fully overflow from ventilator 4 in heat exchange rear; The object of foundation ditch 3 stepped designs be also to reduce air blast cooling for cold bed 6 first three/impact of a mild air cooling, reduce Wei Shi soma and bainite structure and form. After cold bed 6,1/3rd air enter from dark, long outlet foundation ditch 37, and the design of turning back of foundation ditch posterior transversal, carries out reducing temperature twice for the steel that carry out strong cold cooling. Use the air-cooled Compound cooling of above-mentioned this kind of air cooling, cooling velocity promotes (average cooling rate rises to 22.5 DEG C/min by 14.5 DEG C/min of common air-cooled cold bed), and under steel, the poker temperature difference of cold bed is less than 10 DEG C, thereby ensure in increasing cooldown rate, ensure cooling uniformity, also solved distortion and cooling wave problem that super large-scale model flat-bulb steel web produces because of inhomogeneous cooling and deadweight simultaneously, and early stage cooling too fast Wei Shi soma and bainite structure a large amount of formation and the problem of the finished product intensity difference that causes.
(5) cooling good first material carries out subdivision, aligning. This step is used respectively subdivision, aligning machinery, also can directly enter subdivision aligning associating unit, described aligning associating unit comprises the disc type cutting equipment in straightener and its front, rolled piece is opened the junction cutting of two flat-bulb steels in traveling process, can realize the good surface quality of split surface, and realize on-line continuous equalization, efficiency is high.
It should be noted that; particular of the present utility model have been described in detail the utility model; for a person skilled in the art, the various apparent change of in the situation that not deviating from spirit and scope of the present utility model, it being carried out is all within protection domain of the present utility model.
Claims (5)
1. a shaped steel cooling device, comprises cold bed factory building and cold bed, it is characterized in that: described cold bed factoryThe cold bed entrance in room and cold bed exit are provided with entrance foundation ditch and outlet foundation ditch, and the top of cold bed factory building is provided with logicalWind device; The below of cold bed is provided with strong air-cooler; Entrance foundation ditch and outlet foundation ditch all stretch out outside cold bed factory building,Entrance foundation ditch communicates by cold bed below foundation ditch with outlet foundation ditch; Described entrance foundation ditch length, degree of depth differenceBe less than outlet foundation ditch, foundation ditch is stepped, lower rank and outlet foundation ditch level, upper rank and entrance foundation ditch level.
2. a kind of shaped steel cooling device according to claim 1, is characterized in that: described foundation ditchWidth be more than or equal to the width of cold bed.
3. a kind of shaped steel cooling device according to claim 1, is characterized in that: described is cold by forceBlower fan and ventilator are multiple, and multiple ventilator are linear array, and the linearly aligned width of ventilator and coldBedside degree is consistent, and described multiple strong air-cooler is linear array, the strong linearly aligned width of air-cooler and coldBedside degree is consistent, and the spacing of adjacent two powers' air-cooler can make two powers' air-cooler blow to the air flow energy phase of cold bedIntersect mutually.
4. a kind of shaped steel cooling device according to claim 1, is characterized in that: described is cold by forceBlower fan and ventilator number are equal, and the angle between air outlet and the ventilator of strong air-cooler is 15 °～20 °.
5. a kind of shaped steel cooling device according to claim 1, is characterized in that: described is cold by forceAssembling is rear 1/3rd places in cold bed.
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| CN201521015653.3U CN205236625U (en) | 2015-12-09 | 2015-12-09 | Shaped steel cooling device |
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| CN201521015653.3U CN205236625U (en) | 2015-12-09 | 2015-12-09 | Shaped steel cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478499A (en) * | 2015-12-09 | 2016-04-13 | 日照钢铁控股集团有限公司 | Section steel cooling device |
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2015
- 2015-12-09 CN CN201521015653.3U patent/CN205236625U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105478499A (en) * | 2015-12-09 | 2016-04-13 | 日照钢铁控股集团有限公司 | Section steel cooling device |
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