CN111822519A - Cold continuous rolling mill roller cooling control system - Google Patents
Cold continuous rolling mill roller cooling control system Download PDFInfo
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- CN111822519A CN111822519A CN202010873573.0A CN202010873573A CN111822519A CN 111822519 A CN111822519 A CN 111822519A CN 202010873573 A CN202010873573 A CN 202010873573A CN 111822519 A CN111822519 A CN 111822519A
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- emulsion
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- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 239000000498 cooling water Substances 0.000 claims abstract description 153
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000000839 emulsion Substances 0.000 claims abstract description 100
- 239000007921 spray Substances 0.000 claims abstract description 76
- 238000005507 spraying Methods 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 55
- 239000007924 injection Substances 0.000 claims abstract description 55
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000004064 recycling Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 23
- 239000010959 steel Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 72
- 239000007788 liquid Substances 0.000 description 10
- 239000002480 mineral oil Substances 0.000 description 9
- 235000010446 mineral oil Nutrition 0.000 description 9
- 239000012535 impurity Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000004495 emulsifiable concentrate Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a cooling control system for a cold continuous rolling mill roller, which comprises a water supply unit, an oil supply unit, a mixer, an emulsion injection unit, a recovery unit, a cooling water injection unit and a controller, wherein the water supply unit is connected with the oil supply unit; the water of the water supply unit flows into the mixer; the oil of the oil supply unit flows into the mixer; the mixer mixes oil and water into emulsion and transmits the emulsion to the emulsion injection unit; the emulsion injection unit injects emulsion to the upper working roll and the lower working roll, and lubricates and cools the upper working roll and the lower working roll; the recovery unit is used for recovering the emulsion of the emulsion injection unit and separating water and oil; the cooling water spraying unit sprays and cools the support roller, the intermediate roller and the working roller by using the recovered water; the controller controls the water supply unit, the oil supply unit, the emulsion injection unit and the cooling water injection unit to work. The invention can accurately control the temperature, concentration and quality of the emulsion, thereby ensuring the cooling effect of the surface of the roller of the cold continuous rolling mill and improving the quality of strip steel.
Description
Technical Field
The invention belongs to the field of steel rolling machinery in the metallurgical industry, and particularly relates to a cooling control system for a cold continuous rolling mill roller.
Background
The six-roller mill is the main equipment in the metal processing process in the metallurgical industry. The roller mainly comprises a supporting roller, a middle roller, a working roller and the like. The working roll is a part for directly processing the cold-rolled strip steel by the rolling mill, and because the rolling mill continuously rolls the surface of the roll, a large amount of uneven heat can be generated, and the uneven heat on the surface can generate the internal stress of the roll, thereby influencing the surface quality of the cold-rolled strip steel. The quality of strip steel at the outlet of the last stand is directly related to the product quality, and the cooling of the last stand can effectively eliminate the internal stress of the roller caused by uneven heating. At present, the surface of the working roll inlet of the rolling mill is cooled by spraying emulsion, and the mode can take away heat generated during rolling, reduce friction force between the roll and between the roll and strip steel, reduce rolling energy consumption and improve surface quality. However, the cooling method has the following problems:
the cooling of the sprayed emulsion on the surface of the cold continuous rolling mill roller can cause large consumption of mineral oil and water, unstable concentration of the emulsion, poor effect of lubricating the roller, easy residue of emulsion impurities on the surface of the strip steel and influence on the product quality. The control accuracy of the cooling effect of the working roll of the rolling mill is poor, the surface plate type of the strip steel is not easy to guarantee, and the surface plate type of the strip steel is poor. The temperature control of the emulsion of the working roll of the rolling mill is not accurate enough, the quality of the emulsion is not easy to guarantee, and the emulsion impurity residues are easy to be generated on the surface of the strip steel. The filtering reuse water of the emulsion cooling water of the rolling mill contains impurities, which affects the surface quality of the strip steel.
Disclosure of Invention
The invention aims to provide a cold continuous rolling mill roller cooling control system which can accurately control the temperature, concentration and quality of emulsion so as to ensure the cooling effect of the cold continuous rolling mill roller surface and improve the quality of strip steel.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a cooling control system for a cold continuous rolling mill roller comprises a water supply unit, an oil supply unit, a mixer, an emulsion injection unit, a recovery unit, a cooling water injection unit and a controller; the water supply unit is used for conveying water to the mixer; the oil supply unit is used for conveying oil to the mixer; the mixer mixes oil and water into emulsion and transmits the emulsion to the emulsion injection unit; the emulsion injection unit injects emulsion to the upper working roll and the lower working roll, and lubricates and cools the upper working roll and the lower working roll; the recovery unit is used for recovering the emulsion of the emulsion injection unit and separating water and oil; the cooling water spraying unit sprays and cools the support roller, the intermediate roller and the working roller by using recovered water; the controller controls the water supply unit, the oil supply unit, the emulsion injection unit and the cooling water injection unit to work.
According to the scheme, the water supply unit comprises a water inlet valve, a desalted water station, a water tank, a first heating cooler, a first water pump, a first filter, a first flow valve, a first three-way valve and a first valve; water flows into a water tank through a water inlet valve and a desalted water station, the first heating cooler is positioned in the water tank, and the water in the water tank flows into the mixer after sequentially passing through a water pump, a first filter, a first flow valve, a first three-way valve and a first valve; a first pressure gauge is arranged between the inlet of the first three-way valve and the first flow valve; one outlet of the first three-way valve is communicated with the water tank through a pipeline, and return water of the first three-way valve flows into the water tank; the controller controls the water inlet valve, the desalted water station, the first heating cooler, the first water pump, the first filter, the first flow valve, the first three-way valve and the first valve to work.
According to the scheme, the oil supply unit comprises an oil inlet valve, an oil tank, a second heating cooler, an oil pump, a second filter, a second flow valve, a second three-way valve and a second valve; the oil flows into the oil tank through the oil inlet valve; the second heating cooler is arranged in the oil tank; the oil in the oil tank flows into the mixer after sequentially passing through the oil pump, the second filter, the second flow valve, the second three-way valve and the second valve; a second pressure gauge is arranged between the inlet of the second three-way valve and the second flow valve; one outlet of the second three-way valve is communicated with the oil tank through a pipeline, and return oil of the second three-way valve flows into the oil tank; the controller controls the oil inlet valve, the second heating cooler, the oil pump, the second filter, the second flow valve, the second three-way valve and the second valve to work.
According to the scheme, the emulsion injection unit comprises an upper working roll emulsion injection beam and a lower working roll emulsion injection beam which are respectively connected with the mixer; the upper working roll emulsion spraying beam sprays emulsion to the upper working roll to lubricate and cool the upper working roll; and the lower working roll emulsion spraying beam sprays emulsion to the lower working roll to lubricate and cool the lower working roll.
According to the scheme, the upper working roll emulsion injection beam and the lower working roll emulsion injection beam have the same structure and respectively comprise an emulsion injection beam body and a single-row nozzle positioned on the emulsion injection beam body; the controller controls the single-row nozzles to work in a segmented mode.
According to the scheme, the recovery unit comprises a cooling water collecting tank, a permanent magnet filter, a vacuum variable frequency filter, an emulsifiable oil separator, a third valve, a fourth valve, a waste oil tank and a cooling water recycling tank; the cooling water collecting tank is positioned below the cold continuous rolling mill roller, and water in the cooling water collecting tank sequentially passes through the permanent magnet filter, the vacuum variable frequency filter and the missible oil separator; the missible oil separator inputs the separated oil into a waste oil tank through a third valve; the missible oil separator inputs the separated water into a cooling water recycling tank through a fourth valve.
According to the scheme, the cooling water spraying unit comprises a second water pump, a third filter, a third flow valve, a third three-way valve and a cooling water spraying mechanism; and water of the recovery unit flows into the cooling water spraying mechanism through the second water pump, the third filter, the third flow valve and the third three-way valve in sequence, and the cooling water spraying mechanism sprays water to cool the roller of the tandem cold mill.
According to the scheme, the cooling water spraying mechanism comprises a lower supporting roller cooling water spraying beam, a lower working roller cooling water spraying beam, an upper middle roller cooling water spraying beam and an upper supporting roller cooling water spraying beam; the lower supporting roller cooling water spraying beam sprays cooling water to the lower supporting roller and the lower middle roller; the lower working roll cooling water spraying beam sprays cooling water to the lower working roll and the lower intermediate roll; the upper working roll cooling water spraying beam sprays cooling water to the upper working roll and the upper intermediate roll; the upper middle roller cooling water spraying beam sprays cooling water to the upper middle roller; and the upper support roller cooling water spraying beam sprays cooling water to the upper support roller.
According to the scheme, the lower working roll cooling water spraying beam and the upper working roll cooling water spraying beam have the same structure and respectively comprise a cooling water spraying beam body and double rows of nozzles positioned on the cooling water spraying beam body; the controller controls the double-row nozzles to work in a segmented mode; the nozzles are distributed along the axial direction of the working roll and correspond to the plate type rolls one by one.
According to the scheme, the lower support roller cooling water spraying beam, the upper middle roller cooling water spraying beam and the upper support roller cooling water spraying beam are identical in structure and respectively comprise a cooling water spraying beam body and a single-row nozzle positioned on the cooling water spraying beam body; the controller controls the single-row nozzles to work in a segmented mode; the nozzles are distributed along the axial direction of the working roll and correspond to the plate type rolls one by one.
The invention has the beneficial effects that:
the oil tank and the water tank are respectively provided with a heating cooler capable of controlling the temperature of water and mineral oil, the flow of the water and the mineral oil is controlled through a flow valve, the concentration, the temperature and the flow of the emulsion are further controlled, and the quality of the emulsion is guaranteed.
The water supply unit and the oil supply unit are controlled by the controller, so that the temperature, the concentration and the quality of the emulsion are accurately controlled, the cooling effect of the surface of the roller of the tandem cold mill is ensured, the surface plate type of the strip steel is ensured, and the quality of the strip steel is improved.
Through setting up the recovery unit, carry out recovery separation and utilization to the emulsion, reduce the consumption of mineral oil and water, energy-conservation is environmental protection again.
By arranging the emulsion injection unit, the cooling water injection unit and the recovery unit, the consumption of mineral oil and water is reduced, and the production cost is reduced.
The emulsion has stable quality, and no emulsion impurities are left on the surface of the strip steel.
The emulsion is filtered and recovered through the permanent magnet filter, the vacuum variable frequency filter and the missible oil separator, impurities such as iron powder in the emulsion are removed, the emulsion cooling water can be reused, the filtering effect is good, and energy can be saved.
The controller controls the nozzle to work in a segmented mode, so that the injection is more accurate.
The opening and closing quantity of nozzles of the lower supporting roller cooling water injection beam, the lower working roller cooling water injection beam, the upper middle roller cooling water injection beam and the upper supporting roller cooling water injection beam is controlled, so that the distribution of the temperature of the roller is changed by adjusting the distribution of the flow of cooling liquid along the length of the roller body, the size of the thermal convexity is adjusted, the purpose of controlling the shape of the plate is achieved, and the surface quality of the cold-rolled plate is ensured.
The upper cooling water flows to the lower roller, and has a certain cooling effect on the lower roller, so that only one spray beam is needed to spray between the lower support roller and the lower middle roller, the efficiency is improved, and the water consumption is saved.
The emulsion is sprayed at the inlet of the strip steel, so that the temperature of the upper working roll and the lower working roll can be reduced, the upper working roll and the lower working roll are lubricated, the friction of the upper working roll and the lower working roll is reduced, the circulating reuse water is sprayed at the outlet of the strip steel for cooling, the using amount of mineral oil is reduced, the water is saved, the cooling effect is improved, the influence on the surface quality of the strip steel is reduced, and the efficiency of a rolling mill is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the roll cooling control system of the tandem cold mill of the present invention;
FIG. 2 is a schematic structural diagram of an upper working roll emulsion injection beam and a lower working roll emulsion injection beam;
FIG. 3 is a schematic structural view of the lower and upper work roll cooling water spray beams;
FIG. 4 is a schematic structural view of the lower support roll cooling water spray beam, the upper intermediate roll cooling water spray beam, and the upper support roll cooling water spray beam;
FIG. 5 is a schematic view showing the installation of an upper work roll emulsion spray beam, a lower work roll cooling water spray beam, an upper work roll cooling water spray beam, a lower support roll cooling water spray beam, an upper intermediate roll cooling water spray beam, and an upper support roll cooling water spray beam.
In the figure: 1-a water inlet valve, 2-a desalted water station, 3-a first liquid level meter, 4-a water tank, 5-a first heating cooler, 6-an oil tank and 7-a second heating cooler; 8-a second level gauge, 9-an oil inlet valve, 10-a first water pump, 11-a first motor, 12-a first filter, 13-a first flow valve, 14-a first pressure gauge, 15-a first three-way valve, 16-a first valve, 17-an oil pump, 18-a second motor, 19-a second filter, 20-a second flow valve, 21-a second pressure gauge, 22-a second three-way valve, 23-a second valve, 24-a mixer, 25-a steel belt, 26-a waste oil tank, 27-a third level gauge, 28-a third valve, 29-a fourth valve, 30-a floating oil separator, 31-a vacuum frequency conversion filter, 32-a permanent magnet filter, 33-a cooling water collection tank, 34-a cooling water recycling tank, 35-a fourth level gauge, 36-second water pump, 37-third motor, 38-third filter, 39-third flow valve, 40-third pressure gauge, 41-third three-way valve, 42-lower support roller, 43-lower middle roller, 44-lower work roller, 45-lower work roller emulsion spray beam, 46-upper work roller emulsion spray beam, 47-upper work roller, 48-upper middle roller, 49-upper support roller, 50-lower support roller cooling water spray beam, 51-lower work roller cooling water spray beam, 52-upper work roller cooling water spray beam, 53-upper middle roller cooling water spray beam, 54-upper support roller cooling water spray beam, 55-56 steel coil-controller, 57-plate roller, 58-nozzle, 59-emulsion spray beam body, 60-cooling water spraying beam body, 61 and a roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, a roll cooling control system of a tandem cold mill includes a water supply unit, an oil supply unit, a mixer 24, an emulsion injection unit, a recovery unit, a cooling water injection unit, and a controller 56 (control cabinet). The water from the water supply unit flows into the mixer 24; the oil of the oil supply unit flows into the mixer 24; the mixer 24 mixes the oil and water into an emulsion and transfers the emulsion to the emulsion injection unit. The emulsion injection unit injects emulsion to the upper work roll 47 and the lower work roll 44, and lubricates and cools the work roll 47 and the lower work roll 44. The recovery unit is used for recovering the emulsion of the emulsion injection unit and separating water and oil; the cooling water spraying unit sprays and cools the support roller, the intermediate roller and the working roller by using the recovered water; the controller 56 controls the water supply unit, the oil supply unit, the emulsion injection unit, and the cooling water injection unit to operate.
In this embodiment, the water supply unit includes a water inlet valve 1, a desalted water station 2, a water tank 4, a first heating cooler 5, a first water pump 10, a first filter 12, a first flow valve 13, a first pressure gauge 14, a first three-way valve 15, and a first valve 16. Water flows into a water tank 4 through a water inlet valve 1 and a desalted water station 2, a first liquid level meter 3 and a first heating cooler 5 are arranged in the water tank 4, and the water in the water tank 4 sequentially flows into a mixer 24 after passing through a first water pump 10 (controlled by a first motor 11), a first filter 12, a first flow valve 13, a first pressure gauge 14, a first three-way valve 15 and a first valve 16; an outlet of the first three-way valve 15 is communicated with the water tank 4 through a pipe, and the return water of the first three-way valve 15 flows into the water tank 4. The first liquid level meter and the first pressure meter transmit data to the controller 56, and the controller 56 controls the water inlet valve 1, the desalted water station 2, the first heating and cooling device 7, the first water pump 10, the first motor 11, the first filter 12, the first flow valve 13, the first three-way valve 15 and the first valve 16 to work.
In this embodiment, the oil supply unit includes an oil inlet valve 9, an oil tank 6, a second heating cooler 7, an oil pump 17, a second motor 18, a second filter 19, a second flow valve 20, a second pressure gauge 21, a second three-way valve 22, and a second valve 23. The oil flows into the oil tank 6 through the oil inlet valve 9; the second liquid level meter 8 and the second motor 18 are arranged in the oil tank 6. The oil in the oil tank 6 flows into a mixer 24 after passing through an oil pump 17 (controlled by a second motor 18), a second filter 19, a second flow valve 20, a second pressure gauge 21, a second three-way valve 22 and a second valve 23 in sequence; an outlet of the second three-way valve 22 communicates with the oil tank 6 through a pipe, and return oil of the second three-way valve 22 flows into the oil tank 6. The second liquid level meter 8 and the second pressure gauge 14 transmit data to the controller 56, and the controller 56 controls the oil inlet valve 9, the second heating and cooling device 7, the oil pump 17, the second filter 19, the second flow valve 20, the second three-way valve 22 and the second valve 23 to work.
In this embodiment, the emulsion injection unit includes an upper work roll emulsion injection beam 46 and a lower work roll emulsion injection beam 45 that are connected to the mixer 24, respectively; the upper working roll emulsion spraying beam 46 sprays emulsion to the upper working roll 47, and lubricates and cools the upper working roll 47; the lower working roll emulsion spray beam 45 sprays emulsion to the lower working roll 44, and lubricates and cools the lower working roll 44. In the preferred embodiment, upper work roll emulsion spray beam 46 and lower work roll emulsion spray beam 45 are identical in structure and each includes an emulsion spray beam body 59 and a single row of nozzles located on emulsion spray beam body 59; the single row of nozzles has a total of 29 nozzles 58, and the nozzles 58 correspond one-to-one to the axial divisions of the roll 61. The controller 56 controls the operation of the single row of nozzles 58 in stages.
In this embodiment, the recovery unit includes a cooling water collection tank 33, a permanent magnet filter 32, a vacuum variable frequency filter 31, an emulsifiable concentrate separator 30, a third valve 28, a fourth valve 29, a waste oil tank 26, and a cooling water recovery tank 34. The cooling water collecting tank 33 is positioned below the cold continuous rolling mill roller, and water in the cooling water collecting tank 33 sequentially passes through the permanent magnet filter 32, the vacuum variable frequency filter 31 and the missible oil separator 30; the cream separator 30 feeds the separated oil into the waste oil tank 26 through the third valve 28; the cream separator 30 inputs the separated water into the cooling water recycling tank 34 through the fourth valve 29; the waste oil tank 26 is provided with a third level gauge 27, and the cooling water recycling tank 34 is provided with a fourth level gauge 35.
In this embodiment, the cooling water spray unit includes a second water pump 36, a third motor 37, a third filter 38, a third flow valve 39, a third pressure gauge 40, a third three-way valve 41, and a cooling water spray mechanism; the water in the recovery unit flows into the cooling water injection mechanism after passing through the second water pump 36 (connected to the third motor 37), the third filter 38, the third flow valve 39, and the third three-way valve 41 in this order. The cooling water spraying mechanism comprises a lower support roller cooling water spraying beam 50, a lower working roller cooling water spraying beam 51, an upper working roller cooling water spraying beam 52, an upper intermediate roller cooling water spraying beam 53 and an upper support roller cooling water spraying beam 54. The lower support roller cooling water spraying beam 50 sprays cooling water to the lower support roller 42 and the lower intermediate roller 43; the lower working roll cooling water spraying beam 51 sprays cooling water to the lower working roll 44 and the lower intermediate roll 43; the upper work roll cooling water spray beam 52 sprays cooling water to the upper work roll 47 and the upper intermediate roll 48; the upper-intermediate-roller cooling-water spray beam 53 sprays cooling water to the upper intermediate roller 48; the upper support roller cooling water spray beam 54 sprays cooling water to the upper support roller 49. In the preferred embodiment, lower and upper work roll cooling water spray beams 51 and 52 are identical in structure and each include a cooling water spray beam body 60 and two rows of nozzles (upper row of nozzles and lower row of nozzles) on cooling water spray beam body 60; the upper and lower rows of nozzles each comprise 29 nozzles 58; the nozzles are distributed along the axial direction of the working roll and correspond to the plate type rolls one by one; the controller 56 controls the dual row nozzle staging. The lower support roller cooling water spray beam 50, the upper intermediate roller cooling water spray beam 53 and the upper support roller cooling water spray beam 54 have the same structure and respectively comprise a cooling water spray beam body 60 and a single-row nozzle positioned on the cooling water spray beam body 60, wherein the single-row nozzle comprises 29 nozzles 58 which are axially distributed along the roller 61 and correspond to the plate-type rollers one by one. The controller 56 controls the operation of the single row nozzle segments.
The process is as follows: industrial water enters a desalted water station 2 through a water inlet valve 1 for desalting, then enters a water tank 4, a first liquid level meter 3 and a first heating cooler 5 are arranged in the water tank 4, the water enters a mixer 24 through a first water pump 10, a first filter 12, a first flow valve 13, a first pressure gauge 14, a first three-way valve 15 and a first valve 16, and backflow water in the first three-way valve 15 flows back into the water tank 4. Mineral oil enters an oil tank 6 through an oil inlet valve 9, a second heating cooler 7 and a second liquid level meter 8 are arranged in the oil tank 6, the mineral oil is mixed in a mixer 24 through an oil pump 17, a second filter 19, a second flow valve 20, a second pressure gauge 21, a second three-way valve 22 and a second valve 23 to form emulsion, wherein the mineral oil reflows back in the second three-way valve 22 and then reflows back to the oil tank 6. The mixed emulsion is sprayed to the lower working roll 44 and the upper working roll 47 through the lower working roll emulsion spraying beam 45 and the upper working roll emulsion spraying beam 46 respectively for lubrication and cooling. The emulsified liquid and the cooling water are collected by a cooling water collecting tank 33, then enter a waste oil tank 26 through a permanent magnet filter 32, a vacuum frequency conversion filter 31, a floating oil separator 30 and a third valve 28, the filtered water flows into a cooling water recycling tank 34 through a fourth valve 29, a third liquid level meter 27 is arranged in the waste oil tank 26, and a fourth liquid level meter 35 is arranged in the cooling water recycling tank 34. Water in the cooling water recycling tank 34 passes through a second water pump 36, a third motor 37, a third filter 38, a third flow valve 39, a third pressure gauge 40 and a third three-way valve 41 and then is cooled by a lower support roll cooling water spray beam 50, a lower work roll cooling water spray beam 51, an upper work roll cooling water spray beam 52, an upper intermediate roll cooling water spray beam 53 and an upper support roll cooling water spray beam 54 (the lower support roll cooling water spray beam 50 cools the lower support roll 42 and the lower intermediate roll 43, the upper row of nozzles of the lower work roll cooling water spray beam 51 cools the lower work roll 44, the lower row of nozzles cools the lower work roll 44 and the lower intermediate roll 43, the upper row of nozzles of the upper work roll cooling water spray beam 52 cools the upper work roll 47 and the upper intermediate roll 48, the lower row of nozzles of the upper intermediate roll cooling water spray beam 53 cools the upper intermediate roll 48, the upper support roll cooling water spray beam 53 cools the upper intermediate roll cooling water spray beam 48 The water jet beam 54 cools the upper support roller 49), wherein the return water in the third three-way valve 41 is returned to the cooling water recovery tank 34. The strip steel 25 is rolled by the upper working roll 47 and the lower working roll 44 and then curled into a steel coil 55, wherein the upper working roll 47, the lower working roll 44 and the plate type roll 57 thereof are controlled by a control cabinet to meet the cold-rolled strip steel plate type.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A cold tandem mill roll cooling control system which characterized in that: comprises a water supply unit, an oil supply unit, a mixer, an emulsion injection unit, a recovery unit, a cooling water injection unit and a controller; the water supply unit is used for conveying water to the mixer; the oil supply unit is used for conveying oil to the mixer; the mixer mixes oil and water into emulsion and transmits the emulsion to the emulsion injection unit; the emulsion injection unit injects emulsion to the upper working roll and the lower working roll, and lubricates and cools the upper working roll and the lower working roll; the recovery unit is used for recovering the emulsion of the emulsion injection unit and separating water and oil; the cooling water spraying unit sprays and cools the support roller, the intermediate roller and the working roller by using recovered water; the controller controls the water supply unit, the oil supply unit, the emulsion injection unit and the cooling water injection unit to work.
2. The cold continuous rolling mill roll cooling control system as claimed in claim 1, characterized in that: the water supply unit comprises a water inlet valve, a desalted water station, a water tank, a first heating cooler, a first water pump, a first filter, a first flow valve, a first three-way valve and a first valve; water flows into a water tank through a water inlet valve and a desalted water station, a first heating cooler is arranged in the water tank, and the water in the water tank flows into a mixer after sequentially passing through a water pump, a first filter, a first flow valve, a first three-way valve and a first valve; a first pressure gauge is arranged between the inlet of the first three-way valve and the first flow valve; one outlet of the first three-way valve is communicated with the water tank through a pipeline, and return water of the first three-way valve flows into the water tank; the controller controls the water inlet valve, the desalted water station, the first heating cooler, the first water pump, the first filter, the first flow valve, the first three-way valve and the first valve to work.
3. The cold continuous rolling mill roll cooling control system as claimed in claim 1, characterized in that: the oil supply unit comprises an oil inlet valve, an oil tank, a second heating cooler, an oil pump, a second filter, a second flow valve, a second three-way valve and a second valve; the oil flows into the oil tank through the oil inlet valve, and a second heating cooler is arranged in the oil tank; the oil in the oil tank flows into the mixer after sequentially passing through the oil pump, the second filter, the second flow valve, the second three-way valve and the second valve; a second pressure gauge is arranged between the inlet of the second three-way valve and the second flow valve; one outlet of the second three-way valve is communicated with the oil tank through a pipeline, and return oil of the second three-way valve flows into the oil tank; the controller controls the oil inlet valve, the second heating cooler, the oil pump, the second filter, the second flow valve, the second three-way valve and the second valve to work.
4. The cold continuous rolling mill roll cooling control system as claimed in claim 1, characterized in that: the emulsion injection unit comprises an upper working roll emulsion injection beam and a lower working roll emulsion injection beam which are respectively connected with the mixer; the upper working roll emulsion spraying beam sprays emulsion to the upper working roll to lubricate and cool the upper working roll; and the lower working roll emulsion spraying beam sprays emulsion to the lower working roll to lubricate and cool the lower working roll.
5. The tandem cold mill roll cooling control system according to claim 4, characterized in that: the upper working roll emulsion injection beam and the lower working roll emulsion injection beam have the same structure and respectively comprise an emulsion injection beam body and a single-row nozzle positioned on the emulsion injection beam body; the controller controls the single-row nozzles to work in a segmented mode.
6. The cold continuous rolling mill roll cooling control system as claimed in claim 1, characterized in that: the recovery unit comprises a cooling water collecting tank, a permanent magnet filter, a vacuum variable frequency filter, an emulsifiable oil separator, a third valve, a fourth valve, a waste oil tank and a cooling water recycling tank; the cooling water collecting tank is positioned below the cold continuous rolling mill roller, and water in the cooling water collecting tank sequentially passes through the permanent magnet filter, the vacuum variable frequency filter and the missible oil separator; the missible oil separator inputs the separated oil into a waste oil tank through a third valve; the missible oil separator inputs the separated water into a cooling water recycling tank through a fourth valve.
7. The cold continuous rolling mill roll cooling control system as claimed in claim 1, characterized in that: the cooling water spraying unit comprises a second water pump, a third filter, a third flow valve, a third three-way valve and a cooling water spraying mechanism; and water of the recovery unit flows into the cooling water spraying mechanism through the second water pump, the third filter, the third flow valve and the third three-way valve in sequence, and the cooling water spraying mechanism sprays water to cool the roller of the tandem cold mill.
8. The tandem cold mill roll cooling control system according to claim 7, characterized in that: the cooling water spraying mechanism comprises a lower supporting roller cooling water spraying beam, a lower working roller cooling water spraying beam, an upper middle roller cooling water spraying beam and an upper supporting roller cooling water spraying beam; the lower supporting roller cooling water spraying beam sprays cooling water to the lower supporting roller and the lower middle roller; the lower working roll cooling water spraying beam sprays cooling water to the lower working roll and the lower intermediate roll; the upper working roll cooling water spraying beam sprays cooling water to the upper working roll and the upper intermediate roll; the upper middle roller cooling water spraying beam sprays cooling water to the upper middle roller; and the upper support roller cooling water spraying beam sprays cooling water to the upper support roller.
9. The tandem cold mill roll cooling control system of claim 8, wherein: the lower working roll cooling water spraying beam and the upper working roll cooling water spraying beam have the same structure and respectively comprise a cooling water spraying beam body and double rows of nozzles positioned on the cooling water spraying beam body; the controller controls the double-row nozzles to work in a segmented mode.
10. The tandem cold mill roll cooling control system of claim 8, wherein: the lower support roller cooling water spraying beam, the upper middle roller cooling water spraying beam and the upper support roller cooling water spraying beam have the same structure and respectively comprise a cooling water spraying beam body and a single-row nozzle positioned on the cooling water spraying beam body; the controller controls the single-row nozzles to work in a segmented mode.
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| CN202010873573.0A CN111822519A (en) | 2020-08-26 | 2020-08-26 | Cold continuous rolling mill roller cooling control system |
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| CN202010873573.0A CN111822519A (en) | 2020-08-26 | 2020-08-26 | Cold continuous rolling mill roller cooling control system |
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| CN114505347A (en) * | 2022-01-07 | 2022-05-17 | 首钢京唐钢铁联合有限责任公司 | Control method, device and equipment for rolling liquid supply system |
| CN115647077A (en) * | 2022-12-09 | 2023-01-31 | 首钢智新迁安电磁材料有限公司 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
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Application publication date: 20201027 |