CN2282465Y - Water curtain laminar flow band steel cooler - Google Patents
Water curtain laminar flow band steel cooler Download PDFInfo
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- CN2282465Y CN2282465Y CN 96211971 CN96211971U CN2282465Y CN 2282465 Y CN2282465 Y CN 2282465Y CN 96211971 CN96211971 CN 96211971 CN 96211971 U CN96211971 U CN 96211971U CN 2282465 Y CN2282465 Y CN 2282465Y
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Abstract
The utility model relates to a cooling device for strip steel. The utility model is especially suitable for cooling the hot-rolled strip steel. The utility model is composed of a water curtain cooling component, a laminar flow cooling component, a bottom spray component, a pressure-stabilizing tank overflow component and a cooling water side spray component. The utility model adopts the optimal combining form of the water curtain and the laminar flow strip steel cooling. The complicated cooling process is realized, the cooling capacity is reinforced, the winding temperature is exactly controlled, a lot of cooling water is saved, the output length of the roller way is shortened, and the production cost is reduced.
Description
The utility model relates to a kind of band steel cooling device, is particularly suitable for the cooling device of hot-strip.
In modern hot strip steel is produced,, obtain the mechanical performance of the hot-strip of high-quality in order further to improve the quality of products and to increase economic benefit, hot strip steel is after leaving last frame finishing mill, enter before the coiling machine, on runout table, hot strip steel is cooled off fast, with control strip coiling temperature.Particularly, when high-tensile structural steel and skelp, need make ferrite crystal grain refinement and reinforced deposition, must accurately control cooling strip speed and time and temperature, thereby obtain needed high-quality band steel producing the high-quality steel alloy.In band steel cooling procedure, the symmetry cooling of upper and lower surface and the constant cooling of band steel overall with breadth be crucial.After the band steel of about 900 ℃ of finishing temperatures comes out from last frame finishing mill,, in such short time, be cooled to 550 ℃ to 600 ℃ rapidly and have only mounting strap steel quickly cooling device could realize above-mentioned requirements about about 50 seconds of operation on the runout table.
Band steel cooling device not only will guarantee to be with steel to be cooled fast to outside the coiling temperature by finishing temperature, also will control the uniformity that the band steel cools off on total length and same full width orientation, to guarantee the mechanical performance uniformity of band steel.For this reason, the research and the application of band steel cooling device have become the important topic that solution is badly in need of in domestic and international hot strip mill design, and at home and abroad field of metallurgy is generally paid attention to.
Present common employing be laminar flow cooling or water curtain cooling, but have following problem:
One, there is following shortcoming in laminar flow cooling hot strip steel:
A laminar flow cooling hot strip steel adopts the low pressure laminar flow type of cooling, promptly adopt the circulation low pressure water system, make cooling water flow to belt steel surface by having goose shape pipe collector, form the column current, the contact hot strip steel has certain orientation, when cooling water absorbs certain heat and steel going along with advances one section, the water that is had pressure by the side nozzle ejection blows away the belt steel surface cooling water, bring in constant renewal in to guarantee cooling water, cooling water flows out from goose shape pipe and is the plume shape, directly impact the hot strip steel surface, have the multiply water of spacing to contact with hot strip steel, being formed on has many directly clearance parts of impact that do not have on the hot strip steel, according to the pilot production analysis, cooling water directly impact place cooling effect is bigger two times more than than space position, causes the hot strip steel surface cool inhomogeneous.
The cooling of b laminar flow needs between very long cooling zone, and the longest laminar flow cooling of hot strip mill engineering has about 150 meters in the world at present, and a large amount of collector pipes need be set, the pipe-line system complexity, and equipment investment is big, the installation and maintenance difficulty.
It is intensive that c laminar flow cooling manifold is arranged, it is very disadvantageous returning heat for tropical steel core portion, and directly influences the quality and the mechanical performance of product.
Two, there is following shortcoming in water curtain cooling hot strip steel:
A uses water curtain heat of cooling band steel merely, because single water curtain collector flow is big, though can satisfy the speed of cooling hot strip steel, is difficult to the accurately coiling temperature of control hot strip steel.
B is for hot strip steel and since can not accurately control coiling temperature especially hot strip steel end to end with the middle part temperature contrast, cause the hot strip steel inhomogeneous cooling even, directly influence hot-strip end product quality and mechanical performance.
C, though can adjust cooling velocity and temperature with opening several roads water curtain, really controls coiling temperature compared with laminar flow salband aluminium and just differs greatly during the cooling of the hot strip steel of width and temperature for different-thickness.
The purpose of this utility model is in order to solve the problem of above-mentioned cooling device, to design a kind of cooling velocity that can control the band steel effectively, can guaranteeing the temperature controlled Water Curtain Strip Laminar Cooling Device of strip coiling again.
The purpose of this utility model is achieved in that a kind of Water Curtain Strip Laminar Cooling Device of design, by the water curtain cooling-part, the laminar flow cooling-part, water side spray cooling-part, end spray cooling-part, the vacuum tank overflow means is formed, the master comes water pipe to use bolting in ground level by bearing, come to be provided with branched pipe on the water pipe the master, branched pipe connects by flange with automatic regulating valve and expansion joint with water curtain, expansion joint connects a three-way pipe, one end and the vacuum tank overflow launder of three-way pipe are connected, the other end connects water curtain and connects with arm with acceleration switching valve, and arm and water curtain collector are connected; Coming water pipe to branch out another branched pipe described master links to each other with flange with automatic regulating valve with laminar flow, and be welded as a whole by arm and three-way pipe, one end of three-way pipe links to each other with the vacuum tank overflow launder, the other end and laminar flow are connected with acceleration switching valve, and acceleration switching valve is connected by arm and laminar flow cooling manifold.
In the described vacuum tank overflow launder automatic water level alarm and overflow pipe are housed, described automatic water level alarm is fixed on the top board on vacuum tank overflow launder top, guide rod is housed and along with the water level slide block of SEA LEVEL VARIATION on the described water level alarm.
Described water curtain cooling manifold side is provided with water inlet, and top board place in top is welded with water fender along its length, and the bottom is provided with flow-guiding mouth near the place, side, is welded with the arc of curved shape near described flow-guiding mouth place.
The utility model adopts Water Curtain Strip Laminar Cooling Device, and this installs hot strip steel cooling capacity height, and speed is fast, has realized complicated cooling procedure control, has increased cooling capacity, can accurately control coiling temperature.
Because this device is going out saliva along the continuous en plaque current of entire belt cross direction outflow, guarantee that hot strip steel is in vertical, laterally evenly cooling, improved the product comprehensive mechanical performance, be provided with two road laminar flow cooling-parts (Fig. 3) behind the water curtain cooling-part, as accurate adjustment, guarantee that the coiling temperature Deviation Control is in ± 15 ℃.
Water curtain and laminar flow cooling-part are by the automatic regulating valve regulating pondage, and the vacuum tank overflow means guarantees that cooling water pressure is constant, and acceleration switching valve control is rapidly opened and closed, guarantee that hot strip steel cools off evenly end to end.The water curtain cooling is cooled off hot strip steel fast, and the laminar flow cooling has guaranteed accurate control coiling temperature, and the spray of water side brings in constant renewal in cooling water by switch valve control, and end spray parts film-cooled heat is big, and cooling evenly.
In the water curtain cooling-part, adopt novel water curtain manifold construction pattern, this structure guarantees that not only the water curtain thin and thick is even, does not have act phenomenon that contracts and exists.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is a water curtain laminar flow salband steel installation drawing
Fig. 2 is water curtain cooling-part figure
Fig. 3 is laminar flow cooling-part figure
Fig. 4 is vacuum tank overflow means figure
Fig. 5 is water curtain collector figure
Water curtain cooling-part (shown in Figure 2): the master comes water pipe (1) to use bolting in ground level by bearing (23), come to be provided with branched pipe (24) on the water pipe (1) the master, branched pipe (24) connects with flange with automatic regulating valve (2) and expansion joint (5) with water curtain, expansion joint (5) connects a three-way pipe (25), one end of three-way pipe (25) is connected with the vacuum tank overflow launder (6) that circle is disclosed shape, the other end and water curtain are connected with high-speed switch (3), and automatic water level alarm (21) and overflow pipe (29) are housed in the vacuum tank overflow launder (6) (shown in Figure 4).Water level alarm (21) is installed on the top board on vacuum tank overflow launder (6) top, uses bolting.Guide rod is housed and along with the water level slide block (28) of SEA LEVEL VARIATION on the water level alarm (21), water level slide block (28) along with the pressure of the height of water level and water along the guide rod upper and lower displacement, in time demonstrate the variation of water level.When cooling water pressure was big, cooling water jack-up slide block (28) surpassed the delivery port of three-way pipe (25), and cooling water overflows in the vacuum tank overflow launder (6), is back in the big pond from overflow pipe (29).When cooling water pressure was lower than standard and uses water pressure, water level slide block (28), was reported to the police and is regulated the pressure and the flow of water by water curtain with automatic regulating valve (2) to bottom offset along guide rod.Three-way pipe (25) other end connects water curtain and connects (shown in Figure 2) with acceleration switching valve (3) with arm (30), directly cooling water is transported to water curtain collector (7) lining, water curtain collector (shown in Figure 5) is rectangular along its length square box, wherein is provided with water inlet (39), water fender (31), arc (32) and flow-guiding mouth (33).Water inlet (39) is distributed on the water curtain collector side; Water fender (31) is rectangle, and is welded on top board place, water curtain collector top along its length.The bottom that arc (32) is welded on water curtain collector (7) is located near flow-guiding mouth (33), and the curved along its length shape of this plate can make cooling water evenly, flow to the hot strip steel upper surface by flow-guiding mouth (33) reposefully.
Laminar flow cooling-part (shown in Figure 3) comes water pipe (1) to branch out branched pipe (35) (shown in Figure 1) the master, and branched pipe (35) links to each other with flange with automatic regulating valve (10) with laminar flow.And be welded as a whole by arm (36) and three-way pipe (37).One end of three-way pipe (37) links to each other with round barrel shape vacuum tank overflow launder (11) (its structure is identical with vacuum tank overflow launder (6)).The other end and laminar flow are connected with acceleration switching valve (12).Acceleration switching valve (12) communicates with laminar flow cooling manifold (13) by arm (38).Laminar flow cooling manifold (13) is vertically to be a rectangle square tube, goose shape pipe (19) evenly is installed in square tube, goose shape pipe (19) first half is a semicircular arc, and cooling water evenly flows out from goose shape pipe (19) lining after entering laminar flow cooling manifold (13), cooling hot strip steel upper surface.
At the bottom of the water curtain at the bottom of spray parts and the laminar flow spray parts (shown in Figure 1) version be the same.Come water pipe (1) top set to go out distributive pipe (34) the master, distributive pipe (34) is connected with automatic regulating valve (2), (10), again by arm and three-way pipe (25), (37) be welded into one (Fig. 2, shown in Figure 3), at three-way pipe (25) one ends vacuum tank overflow launder (6), (11) are installed, the other end and acceleration switching valve (8), (12) are connected.Acceleration switching valve (8), (12) are connected with flange with arm (40), and arm (40) is connected with spray collector (16) at the bottom of spray collector (9), the laminar flow at the bottom of the water curtain.End spray collector all adopts a circular long tube, enters the hole at the pipe middle part, and top evenly is equipped with aerial fog type nozzle (22), evenly cools off the hot strip steel lower surface.Bearing (27) all is fixed in pipe clamp in end spray collector (9), (16), and bearing (27) uses bolting on ground level.
During this device operation, the water curtain cooling-part comes the cooling water in the water pipe (1) to pass through the flow that automatic water regulating valve (2) is controlled water by the master, and eliminate the distortion that cooling water pipe produces because of the back of expanding with heat and contract with cold by expansion joint (5), cooling water flows into vacuum tank overflow launder (6) respectively afterwards, and is constant to guarantee cooling water pressure.Constant in order to guarantee cooling water pressure, this system is equipped with automatic water level alarm (21) in vacuum tank overflow launder (6), when cooling water during greater than permissible value, and the cooling water automatic overflow, when cooling water pressure during less than permissible value, automatic water level alarm (21) is reported to the police automatically.Automatically regulating pondage valve (2) regulating pondage is constant with the maintenance cooling water pressure.When cooling water under the constant pressure prerequisite, enter water curtain cooling manifold (7) by acceleration switching valve (3), make cooling water evenly, stably be en plaque and wander the hot strip steel upper surface, guarantee neither to splash, can vertically scatter along belt steel surface again, enlarge film-cooled heat, when the en plaque current contact with the hot strip steel surface, cooling water is fully used, and has improved cooling capacity, has saved a large amount of cooling waters.
The laminar flow cooling-part comes the cooling water in the water pipe (1) to pass through the flow that automatic regulating pondage valve (10) is controlled cooling water by the master, eliminate the distortion that cooling water pipe produces because of the back of expanding with heat and contract with cold by expansion joint (14), cooling water flows into vacuum tank overflow launder (11) and acceleration switching valve (12) respectively afterwards.Vacuum tank overflow launder (11) is to guarantee that cooling water pressure is constant, and automatic water level alarm (21) is housed in these parts.If cooling water pressure is greater than permissible value, the cooling water automatic overflow, as less than permissible value, water level alarm (21) sends signal automatically, opens big yield by automatic regulating valve (10), guarantees that cooling water pressure is constant.Under the constant prerequisite of cooling water pressure, cooling water enters every laminar flow collector (13) by acceleration switching valve (12).Because each acceleration switching valve (12) is being controlled each root laminar flow collector (13), measure the hot strip steel temperature according to thermo detector (18), at any time carry out every laminar flow collector of switch control (13) and play the temperature of accurate adjustment cooling hot strip steel, guarantee that coiling temperature is controlled within permissible value ± 15 ℃.Intensive goose shape pipe (19) is housed on the laminar flow cooling manifold (13), and cooling water is fallen the hot strip steel upper surface by goose shape pipe (19) with the freely falling body form, is with the steel cooling.
1, in Water Curtain Strip Laminar Cooling Device, at first calculating and the actual water consumption that makes to the water curtain cooling water water yield is an important parameter, generally selects for use:
Q＝C·S
2·V
2·K
In the formula: Q-flow (m
3/ h) S
2-flowing flux discharge area (m
2)
V
2-flowing flux muzzle velocity (m/s) C-discharge coefficient
K-discharge area correction value
2, determining of water curtain cooling manifold (7) flowing flux arc plate:
The lonely degree of flowing flux arc plate, the decision streamflow regime is concerning formation water curtain important evidence, measures analysis-by-synthesis by a large amount of calculating and field trial
In the formula: m-arc width (mm) X-water curtain spread factor
Z-h is in different cross section value (mm) K-cross section correction value
H-arc plate height (mm)
3, water curtain cooling manifold (7) and laminar flow cooling manifold (13) setting height(from bottom):
Go up requirement according to producing to use, wish that installation is higher, avoid bumping ring water curtain cooling manifold (7) and laminar flow cooling manifold (13) because of production accident.If distance is when high, water impact kinetic energy is big, is easy to generate to splash and cooling water bounces on hot strip steel.If distance is low, it is too little to impact power, though do not splash and the cooling water knock-on, is unfavorable for breaking the vapor film of cooling water at the hot strip steel format surface, influences cooling effectiveness.In sum, water curtain cooling manifold (7) and laminar flow cooling manifold (13) apart from the runout table upper level by calculating and actual tests and determine.
One group of water side spray parts (4) all is set before and after per pass water curtain laminar flow cooling-part, mainly be to improve cooling capacity, after cooling water absorbs hot strip steel surface heat, wash away cooling water after the hot strip steel surface heat absorption with 7 * 10Pa press water, make new cooling water constantly cool off hot strip steel, this is the indispensable part of water curtain cooling facility for laminar flow.In water side spray parts (4), every group of water side spray (4) all has the Pneumatic butterfly valve gauge tap, and in band steel cooling procedure, water side spray (4) generally is in normally open.
In whole cooled region section, all be provided with end spray salband steel part, between every runout table, be provided with end spray collector, on every foundation spray collector aerial fog type nozzle (22) is housed, to constantly cooling off in the hot strip steel lower surface overall with scope.Spray collector (9) generally corresponds to 1: 7 up and down with water curtain cooling manifold (7) at the bottom of the water curtain, returns heat in order to guarantee tropical steel core portion, and is at regular intervals between the every water curtain cooling manifold (7).Spray collector (16) corresponds to 1: 2 with laminar flow cooling manifold (13) is upper and lower at the bottom of the laminar flow, has guaranteed that hot strip steel bottom film-cooled heat is big, and cooling evenly.
The control of Water Curtain Strip Laminar Cooling Device is the important means that realizes the cooling hot strip steel.Because the cooling of band steel is closely-related with mill speed, finishing temperature, band steel matter, thickness, width, coiling temperature, cooling water temperature and the constant of cooling water pressure of the frame finishing mill outlet never of band steel.Therefore, the control that uses a computer realizes that above-mentioned requirements is one of advanced means of controlling now hot strip steel cooling.After frame finishing mill not, and before and after the water curtain parts, before the coiling machine pyrometer (17) is installed and directly detects belt steel temperature, and measured value is sent into computer control system, carry out water curtain laminar flow band steel cooling control.Computer is collected whole relevant datas, before hot strip steel arrives, to measure the upper and lower surface cool ratio of hot strip steel, band steel toe tail compensating length and temperature difference etc., obtain these data after, draw best water curtain laminar flow band steel cooling combination with Mathematical Modeling, and utilize the pyrometer before the coiling machine to feed back, adjust initial design temperature and flow equivalence with this, this feedback also can be improved coefficient in the governing equation according to adaptive mode, thereby improves the performance of whole system.
Claims (3)
1, a kind of Water Curtain Strip Laminar Cooling Device, by the water curtain cooling-part, the laminar flow cooling-part, water side spray cooling-part, end spray cooling-part, the vacuum tank overflow means is formed, it is characterized in that: the master comes water pipe (1) to use bolting in ground level by bearing (23), come to be provided with branched pipe (24) on the water pipe (1) the master, branched pipe (24) connects with flange with automatic regulating valve (2) and expansion joint (5) with water curtain, expansion joint (5) connects a three-way pipe (25), one end of three-way pipe (25) and vacuum tank overflow launder (6) are connected, the other end of three-way pipe (25) connects water curtain and connects with arm (30) with acceleration switching valve (3), and arm (30) is connected with water curtain collector (7); Come water pipe (1) to branch out another branched pipe (35) described master, branched pipe (35) links to each other with flange with automatic regulating valve (10) with laminar flow, and be welded as a whole by arm (36) and three-way pipe (37), one end of three-way pipe (37) links to each other with vacuum tank overflow launder (11), the other end and laminar flow are connected with acceleration switching valve (12), and acceleration switching valve (12) is connected by arm (38) and laminar flow cooling manifold (13).
2, Water Curtain Strip Laminar Cooling Device according to claim 1, it is characterized in that: automatic water level alarm (21) and overflow pipe (29) are housed in the described vacuum tank overflow launder (6), described automatic water level alarm (21) is fixed on the top board on vacuum tank overflow launder (6) top, guide rod is housed and along with the water level slide block (28) of SEA LEVEL VARIATION on the described water level alarm (21).
3, Water Curtain Strip Laminar Cooling Device according to claim 1, it is characterized in that: described water curtain cooling manifold (7) side is provided with water inlet (39), top board place, top is welded with water fender (31) bottom along its length and is provided with flow-guiding mouth (33) near the place, side, locates to be welded with the arc (32) of curved shape near described flow-guiding mouth (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96211971 CN2282465Y (en) | 1996-05-23 | 1996-05-23 | Water curtain laminar flow band steel cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96211971 CN2282465Y (en) | 1996-05-23 | 1996-05-23 | Water curtain laminar flow band steel cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282465Y true CN2282465Y (en) | 1998-05-27 |
Family
ID=33894765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96211971 Expired - Lifetime CN2282465Y (en) | 1996-05-23 | 1996-05-23 | Water curtain laminar flow band steel cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282465Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430163C (en) * | 2006-09-30 | 2008-11-05 | 南京钢铁股份有限公司 | Laminated flowing cooling water side-jetting sweeping system after high-strength low-alloy steel being rolled |
| CN102069097A (en) * | 2011-01-20 | 2011-05-25 | 马鞍山钢铁股份有限公司 | System and process for cooling after H-shaped steel is hot-rolled |
| CN101463824B (en) * | 2008-12-29 | 2011-09-28 | 中冶南方工程技术有限公司 | Design method for independent water supply and spill of hot-rolling high-pressure water pump station |
| CN101502849B (en) * | 2009-03-19 | 2011-12-21 | 东北大学 | Medium plate laminar cooling chain edge part shading device control method |
| CN102740522A (en) * | 2012-06-13 | 2012-10-17 | 王星 | Silicon steel column for intermediate-frequency electric furnace |
| CN104190728A (en) * | 2014-08-20 | 2014-12-10 | 新疆八一钢铁股份有限公司 | Funneling water curtain cooling device |
| CN104785555A (en) * | 2015-05-04 | 2015-07-22 | 中冶南方工程技术有限公司 | Superstrong cooling device |
| CN105013841A (en) * | 2015-07-22 | 2015-11-04 | 中冶南方工程技术有限公司 | Strip steel cooling system |
| CN106311778A (en) * | 2016-08-30 | 2017-01-11 | 北京首钢自动化信息技术有限公司 | Method for online automatic maintaining of hot-rolled laminar cooling manifolds |
| CN107350297A (en) * | 2017-07-12 | 2017-11-17 | 唐山新宝泰钢铁有限公司 | Strip cooling device and strip cooling means |
| CN110087802A (en) * | 2016-12-26 | 2019-08-02 | 宝山钢铁股份有限公司 | A kind of thin strip continuous casting strip steel cooling body and its cooling means |
| CN110665964A (en) * | 2019-10-14 | 2020-01-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for rolling thin X70 pipeline steel strip |
-
1996
- 1996-05-23 CN CN 96211971 patent/CN2282465Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430163C (en) * | 2006-09-30 | 2008-11-05 | 南京钢铁股份有限公司 | Laminated flowing cooling water side-jetting sweeping system after high-strength low-alloy steel being rolled |
| CN101463824B (en) * | 2008-12-29 | 2011-09-28 | 中冶南方工程技术有限公司 | Design method for independent water supply and spill of hot-rolling high-pressure water pump station |
| CN101502849B (en) * | 2009-03-19 | 2011-12-21 | 东北大学 | Medium plate laminar cooling chain edge part shading device control method |
| CN102069097A (en) * | 2011-01-20 | 2011-05-25 | 马鞍山钢铁股份有限公司 | System and process for cooling after H-shaped steel is hot-rolled |
| CN102069097B (en) * | 2011-01-20 | 2012-09-05 | 马鞍山钢铁股份有限公司 | System and process for cooling after H-shaped steel is hot-rolled |
| CN102740522A (en) * | 2012-06-13 | 2012-10-17 | 王星 | Silicon steel column for intermediate-frequency electric furnace |
| CN104190728A (en) * | 2014-08-20 | 2014-12-10 | 新疆八一钢铁股份有限公司 | Funneling water curtain cooling device |
| CN104785555A (en) * | 2015-05-04 | 2015-07-22 | 中冶南方工程技术有限公司 | Superstrong cooling device |
| CN105013841A (en) * | 2015-07-22 | 2015-11-04 | 中冶南方工程技术有限公司 | Strip steel cooling system |
| CN106311778A (en) * | 2016-08-30 | 2017-01-11 | 北京首钢自动化信息技术有限公司 | Method for online automatic maintaining of hot-rolled laminar cooling manifolds |
| CN110087802A (en) * | 2016-12-26 | 2019-08-02 | 宝山钢铁股份有限公司 | A kind of thin strip continuous casting strip steel cooling body and its cooling means |
| CN110087802B (en) * | 2016-12-26 | 2021-11-23 | 宝山钢铁股份有限公司 | Thin strip continuous casting strip steel cooling mechanism and cooling method thereof |
| CN107350297A (en) * | 2017-07-12 | 2017-11-17 | 唐山新宝泰钢铁有限公司 | Strip cooling device and strip cooling means |
| CN110665964A (en) * | 2019-10-14 | 2020-01-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for rolling thin X70 pipeline steel strip |
| CN110665964B (en) * | 2019-10-14 | 2021-06-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for rolling thin X70 pipeline steel strip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Shougang Co., Ltd. Assignor: Capital Iron & Steel General Company Contract fulfillment period: In May 23, 2006, 6 years, the patent expires Contract record no.: 200210042 Denomination of utility model: Water curtain laminar flow strip steel cooling device Granted publication date: 19980527 License type: Pai Ta Record date: 2002.6.3 |
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| LIC | Patent licence contract for exploitation submitted for record |
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