CN110883113B - Laminar cooling water supply equipment and using method - Google Patents

Laminar cooling water supply equipment and using method Download PDF

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Publication number
CN110883113B
CN110883113B CN201911050065.6A CN201911050065A CN110883113B CN 110883113 B CN110883113 B CN 110883113B CN 201911050065 A CN201911050065 A CN 201911050065A CN 110883113 B CN110883113 B CN 110883113B
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Prior art keywords
water tank
water
switching valve
pump
area
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CN110883113A (en
Inventor
陈平
邹星禄
朱惠
沈益
康炳顶
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Jiangsu Shagang Group Co Ltd
Zhangjiagang Hongchang Steel Plate Co Ltd
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Jiangsu Shagang Group Co Ltd
Zhangjiagang Hongchang Steel Plate Co Ltd
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Priority to CN201911050065.6A priority Critical patent/CN110883113B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The application discloses laminar flow cooling water supply equipment and a using method, the laminar flow cooling water supply equipment comprises a cold water tank, a high-level water tank water supply pump, a high-level water tank, a set of high-level water tank pipeline self-cleaning filters, a variable frequency pump set, a set of variable frequency pump set pipeline self-cleaning filters, a variable frequency pump set A-area switching valve, a variable frequency pump set B-area switching valve, a high-level water tank A-area switching valve, a high-level water tank B-area switching valve, a laminar flow cooling equipment A-area, a laminar flow cooling equipment B-area, a set of laminar flow injection valves, a water collecting pit, a hot water tank, a lifting pump, a set of high-speed filters and a cooling tower.

Description

Laminar cooling water supply equipment and using method
Technical Field
The invention belongs to the technical field of laminar cooling water supply, and particularly relates to laminar cooling water supply equipment and a using method thereof.
Background
The laminar cooling is an important equipment component of a hot rolled plate, is positioned behind a finishing mill, consists of an upper collecting pipe, a lower collecting pipe and a side spray, is subjected to laminar cooling after the finishing mill finishes rolling, cools the steel plate by opening the upper collecting pipe, the lower collecting pipe and a water valve of the side spray of the laminar cooling, and meets the requirements of the steel plate cooling process according to the number of groups of the opened cooling collecting pipes and the cooling time. The cooling header has strict requirements on water flow and water pressure in the header in the steel plate cooling process, when the cooling header is required to be completely opened and water is supplied at a large flow rate for special steel types, insufficient water supply of pipelines can occur, the water pressure is low, the conditions such as field use requirements cannot be met, the cooling effect of the steel plate is poor, the process requirement cannot be met, and defective steel plates are generated.
At present, the laminar flow cooling water supply is common, the high-level water tank supplies water under the conditions of small flow and small pressure, and once the high-level water tank supplies water on site, the high-level water tank cannot meet the site requirements when higher requirements are made on water flow and water pressure.
Disclosure of Invention
The technical problem to be solved is as follows: the application mainly provides laminar flow cooling water supply equipment and a using method, and solves the technical problems that the cooling effect of a steel plate is poor, the requirement of a process cannot be met, defective steel plates are generated and the like in the prior art.
The technical scheme is as follows:
a laminar flow cooling water supply device comprises a cold water tank, a high-level water tank water supply pump, a high-level water tank, a group of high-level water tank pipeline self-cleaning filters, a variable frequency pump set, a group of variable frequency pump set pipeline self-cleaning filters, a variable frequency pump set A-zone switching valve, a variable frequency pump set B-zone switching valve, a high-level water tank A-zone switching valve, a high-level water tank B-zone switching valve, a laminar flow cooling equipment A-zone, a laminar flow cooling equipment B-zone, a group of laminar flow injection valves, a water collecting pit, a hot water tank, a lift pump, a group of high-speed filters and a cooling tower, wherein one water outlet pipeline is connected with the high-level water tank through the high-level water tank water supply pump, the other water outlet pipeline is sequentially connected with the variable frequency pump set and the group of variable frequency pump set pipeline self-cleaning filters, a water outlet of the high-level water tank is connected with a water inlet of the group of high-level water tank pipeline self-cleaning filters, the water outlets of the group of high-level water tank pipeline self-cleaning filters are respectively connected with the water inlets of the switching valve of the high-level water tank A area and the switching valve of the high-level water tank B area, the water outlet of the frequency conversion pump set pipeline self-cleaning filter is respectively connected with the water inlets of the switching valve of the area A of the frequency conversion pump set and the switching valve of the area B of the frequency conversion pump set, the switching valve of the area A of the variable frequency pump set and the switching valve of the area A of the high-level water tank are both connected with the area A of the laminar flow cooling equipment, the switching valve of the area B of the variable frequency pump set and the switching valve of the area B of the high-level water tank are both connected with the area B of the laminar flow cooling equipment, the water outlets of the laminar flow cooling equipment area A and the laminar flow cooling equipment area B are both connected with a group of laminar flow injection valves, a water collecting pit is arranged below the group of laminar flow injection valves, the water collecting pit is sequentially connected with the hot water tank, the lifting pump, the group of high-speed filters and the cooling tower, and a water outlet of the cooling tower is connected with a water inlet of the cold water tank.
As a preferred technical scheme of the invention: the frequency conversion pump group consists of a group of frequency conversion water pumps.
As a preferred technical scheme of the invention: the high-level water tank is used for supplying water when common steel grades such as Q235B, Q345BD, AH36 ship plate steel or DH36 ship plate steel are produced.
As a preferred technical scheme of the invention: the production line steel such as L450M, X60M or X65 uses a frequency conversion pump set to supply water.
As a preferred technical scheme of the invention: and the switching valve of the area A of the variable-frequency pump set, the switching valve of the area B of the variable-frequency pump set, the switching valve of the area A of the high-level water tank and the switching valve of the area B of the high-level water tank are all electric valves.
A use method of laminar cooling water supply equipment specifically comprises the following steps:
the first step is as follows: the method comprises the steps that an original high-level water tank is used for supplying water, water in a cold water pool is lifted by a high-level water tank water supply pump to supply water for the high-level water tank, the water level of the high-level water tank is guaranteed, the water in the high-level water tank passes through a group of high-level water tank pipeline self-cleaning filters, then passes through a high-level water tank A-area switching valve and a high-level water tank B-area switching valve to enter a laminar flow cooling equipment A area and a laminar flow cooling equipment B area, a group of laminar flow injection valves are opened according to the cooling requirements of a rolling line to cool strip steel, the cooled accumulated water flows into a water collecting pit, enters a hot water pool through a pipeline, is lifted to a cooling tower through a group of high-speed filters by a lifting pump to cool the cold water pool, and the water is recycled;
the second step is that: water is supplied by using a variable frequency pump set, the variable frequency pump set takes water from a cold water tank, passes through a group of variable frequency pump set pipelines and self-cleaning filters, then passes through a switching valve of a region A of the variable frequency pump set and a switching valve of a region B of the variable frequency pump set, enters a region A of laminar flow cooling equipment and a region B of the laminar flow cooling equipment, opens a group of laminar flow injection valves to cool strip steel according to the cooling requirement of a rolling line, accumulated water after cooling flows into a water collecting pit, enters a hot water tank through a pipeline, is lifted to a cooling tower through a group of high-speed filters by a lifting pump, and then enters a cold water tank to realize the recycling of water;
the third step: when only the high-level water tank is used, the variable-frequency pump set stops running, meanwhile, a switching valve of a region A of the variable-frequency pump set and a switching valve of a region B of the variable-frequency pump set are closed, the switching valve of the region A of the high-level water tank and the switching valve of the region B of the high-level water tank are opened, water is supplied to the region A of the laminar flow cooling equipment and the region B of the laminar flow cooling equipment, and the field use requirement is met; when the variable-frequency pump set is used for supplying water, the variable-frequency pump set is selected to be started to operate or not according to needs, a switching valve of a region A of the variable-frequency pump set and a switching valve of a region B of the variable-frequency pump set are opened, a switching valve of a region A of a high-level water tank and a switching valve of a region B of the high-level water tank are closed, water is supplied to the region A of the laminar flow cooling equipment and the region B of the laminar flow cooling equipment through the switching valve of the region A of the variable-frequency pump set and the switching valve of the region B of the variable-frequency pump set, and the requirements of field use are met;
the fourth step: when laminar cooling is low in flow and water pressure demand is not high, water is supplied through a high level water tank when common steel grades such as Q235B, Q345BD, AH36 ship plate steel or DH36 ship plate steel are produced; when laminar cooling requires large-flow and high-pressure cooling, such as production pipeline steel such as L450M, X60M or X65, water is supplied for laminar cooling through a variable frequency pump set; the actual requirements of on-site production are met, and when the variable frequency pump set supplies water, the pressure of 0.2MPa or 0.5MPa is selected to replace a high-level water tank according to the pressure requirement to supply water for laminar cooling.
Has the advantages that: compared with the prior art, the laminar cooling water supply equipment and the using method thereof adopt the technical scheme, and have the following technical effects:
1. compared with the water supply of a high-level water tank, the frequency of the frequency converter can be adjusted by using the frequency conversion pump set to supply water according to the field water quantity and the pressure at any time, and the pressure and the water quantity of laminar flow water supply are ensured to have small fluctuation;
2. the variable frequency pump set automatically adjusts the running frequency of the motor according to the flow and pressure requirements during running, so that the energy consumption is less;
3. meanwhile, when laminar cooling water supply is designed, a high-level water tank and a water supply lifting pump set of the high-level water tank are not required to be designed;
4. the conditions of insufficient water supply of pipelines, low water pressure, incapability of meeting the requirements of field use and the like can not occur, and the risks of poor cooling effect, incapability of meeting the process requirements and generation of defective steel plates can not be generated.
Drawings
Fig. 1 is a schematic structural view of a laminar cooling water supply apparatus according to the present invention.
Description of reference numerals: 1. a cold water tank; 2. a water supply pump of the high-level water tank; 3. a high-level water tank; 4. a high-level water tank pipeline self-cleaning filter; 5. a variable frequency pump set; 6. the frequency conversion pump set pipeline self-cleaning filter; 7. a switching valve of a zone A of the variable frequency pump set; 8. a switching valve of a B area of the variable frequency pump set; 9. a switching valve of a high-level water tank A area; 10. a switching valve of a B area of the high-level water tank; 11. laminar cooling equipment A area; 12. laminar cooling equipment B area; 13. a laminar flow injection valve; 14. a sump; 15. a hot water tank; 16. a lift pump; 17. a high speed filter; 18. and (5) cooling the tower.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to explain, by reference, other possible embodiments and advantages of the invention. The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a laminar cooling water supply apparatus, characterized in that: the device consists of a cold water tank 1, a high-level water tank water supply pump 2, a high-level water tank 3, a group of high-level water tank pipeline self-cleaning filters 4, a variable-frequency pump set 5, a group of variable-frequency pump set pipeline self-cleaning filters 6, a variable-frequency pump set A-zone switching valve 7, a variable-frequency pump set B-zone switching valve 8, a high-level water tank A-zone switching valve 9, a high-level water tank B-zone switching valve 10, a laminar flow cooling equipment A-zone 11, a laminar flow cooling equipment B-zone 12, a group of laminar flow injection valves 13, a water collecting pit 14, a hot water tank 15, a lifting pump 16, a group of high-speed filters 17 and a cooling tower 18, wherein one water outlet pipeline of the cold water tank 1 is connected with the high-level water tank 3 through the high-level water tank water supply pump 2, the other water outlet pipeline is sequentially connected with the variable-frequency pump set 5 and the variable-frequency pump set of variable-frequency pump set pipeline self-cleaning filters 6, a water outlet of the high-level water tank 3 is connected with a water inlet of the group of high-level water tank pipeline self-cleaning filters 4, the water outlets of a group of high-level water tank pipeline self-cleaning filters 4 are respectively connected with the water inlets of a high-level water tank A-area switching valve 9 and a high-level water tank B-area switching valve 10, the water outlets of a frequency conversion pump set pipeline self-cleaning filter 6 are respectively connected with the water inlets of a frequency conversion pump set A-area switching valve 7 and a frequency conversion pump set B-area switching valve 8, the frequency conversion pump set A-area switching valve 7 and the high-level water tank A-area switching valve 9 are both connected with a laminar flow cooling equipment A-area 11, the frequency conversion pump set B-area switching valve 8 and the high-level water tank B-area switching valve 10 are both connected with a laminar flow cooling equipment B-area 12, the water outlets of the laminar flow cooling equipment A-area 11 and the laminar flow cooling equipment B-area 12 are both connected with a group of laminar flow injection valves 13, a water collection pit 14 is arranged below the group of laminar flow injection valves 13, the water collection pit 14 is sequentially connected with a hot water tank 15, a lift pump 16, a group of high-speed filters 17 and a cooling tower 18, the water outlet of the cooling tower 18 is connected with the water inlet of the cold water pool 1.
In this embodiment, the variable frequency pump group 5 is composed of a group of variable frequency water pumps.
In this embodiment, the switching valve 7 of the variable frequency pump unit a, the switching valve 8 of the variable frequency pump unit B, the switching valve 9 of the high-level water tank a, and the switching valve 10 of the high-level water tank B are all electric valves.
A method of using a laminar flow cooling water supply apparatus, comprising the steps of:
the first step is as follows: the method comprises the steps that an original high-level water tank 3 is used for supplying water, water in a cold water pool 1 is lifted by a high-level water tank water supply pump 2 to supply water for the high-level water tank 3, the water level of the high-level water tank 3 is guaranteed, the water in the high-level water tank 3 passes through a group of high-level water tank pipelines and self-cleaning filters 4, then enters a laminar flow cooling device A area 11 and a laminar flow cooling device B area 12 through a high-level water tank A area switching valve 9 and a high-level water tank B area switching valve 10, a group of laminar flow injection valves 13 are opened according to the cooling requirement of a rolling line to cool strip steel, accumulated water after cooling flows into a water collecting pit 14, enters a hot water pool 15 through a pipeline, is lifted to a cooling tower 18 through a group of high-speed filters 17 by a lifting pump 16, and then enters the cold water pool 1 after cooling, and the water is recycled;
the second step is that: water is supplied by using a variable frequency pump set 5, the variable frequency pump set 5 takes water from a cold water pool 1, then the water passes through a group of variable frequency pump set pipelines and a self-cleaning filter 6, then the water passes through a switching valve 7 of a region A of the variable frequency pump set and a switching valve 8 of a region B of the variable frequency pump set, enters a region A11 of laminar cooling equipment and a region B12 of the laminar cooling equipment, a group of laminar injection valves 13 are opened according to the cooling requirement of a rolling line to cool strip steel, the accumulated water after cooling flows into a water collecting pit 14, enters a hot water pool 15 through a pipeline, is lifted to a cooling tower 18 through a group of high speed filters 17 by a lifting pump 16, and then enters the cold water pool 1 after cooling, so that the water can be reused;
the third step: when only the high-level water tank 3 is used, the frequency conversion pump set 5 stops running, meanwhile, the switching valve 7 in the area A of the frequency conversion pump set and the switching valve 8 in the area B of the frequency conversion pump set are closed, the switching valve 9 in the area A of the high-level water tank and the switching valve 10 in the area B of the high-level water tank are opened, water is supplied to the area A11 of the laminar flow cooling equipment and the area B12 of the laminar flow cooling equipment, and the field use requirement is met; when the variable-frequency pump set 5 is used for supplying water, the variable-frequency pump set 5 selects whether all the pump sets are started to operate or not according to needs, a switching valve 7 of a region A of the variable-frequency pump set and a switching valve 8 of a region B of the variable-frequency pump set are opened, a switching valve 9 of a region A of a high-level water tank and a switching valve 10 of a region B of the high-level water tank are closed, water is supplied to a region A11 of laminar cooling equipment and a region B12 of laminar cooling equipment through the switching valve 7 of the region A of the variable-frequency pump set and the switching valve 8 of the region B of the variable-frequency pump set, and the field use requirements are met;
the fourth step: when a high-level water tank is used for supplying water for cooling during the production of common steel grades, the steel plate cooling hit rate is 91.59%, and when a variable-frequency pump set is used for supplying water, the steel plate cooling hit rate is 91.69%.
Example 2
As shown in fig. 1, a laminar cooling water supply apparatus, characterized in that: the device consists of a cold water tank 1, a high-level water tank water supply pump 2, a high-level water tank 3, a group of high-level water tank pipeline self-cleaning filters 4, a variable-frequency pump set 5, a group of variable-frequency pump set pipeline self-cleaning filters 6, a variable-frequency pump set A-zone switching valve 7, a variable-frequency pump set B-zone switching valve 8, a high-level water tank A-zone switching valve 9, a high-level water tank B-zone switching valve 10, a laminar flow cooling equipment A-zone 11, a laminar flow cooling equipment B-zone 12, a group of laminar flow injection valves 13, a water collecting pit 14, a hot water tank 15, a lifting pump 16, a group of high-speed filters 17 and a cooling tower 18, wherein one water outlet pipeline of the cold water tank 1 is connected with the high-level water tank 3 through the high-level water tank water supply pump 2, the other water outlet pipeline is sequentially connected with the variable-frequency pump set 5 and the variable-frequency pump set of variable-frequency pump set pipeline self-cleaning filters 6, a water outlet of the high-level water tank 3 is connected with a water inlet of the group of high-level water tank pipeline self-cleaning filters 4, the water outlets of a group of high-level water tank pipeline self-cleaning filters 4 are respectively connected with the water inlets of a high-level water tank A-area switching valve 9 and a high-level water tank B-area switching valve 10, the water outlets of a frequency conversion pump set pipeline self-cleaning filter 6 are respectively connected with the water inlets of a frequency conversion pump set A-area switching valve 7 and a frequency conversion pump set B-area switching valve 8, the frequency conversion pump set A-area switching valve 7 and the high-level water tank A-area switching valve 9 are both connected with a laminar flow cooling equipment A-area 11, the frequency conversion pump set B-area switching valve 8 and the high-level water tank B-area switching valve 10 are both connected with a laminar flow cooling equipment B-area 12, the water outlets of the laminar flow cooling equipment A-area 11 and the laminar flow cooling equipment B-area 12 are both connected with a group of laminar flow injection valves 13, a water collection pit 14 is arranged below the group of laminar flow injection valves 13, the water collection pit 14 is sequentially connected with a hot water tank 15, a lift pump 16, a group of high-speed filters 17 and a cooling tower 18, the water outlet of the cooling tower 18 is connected with the water inlet of the cold water pool 1.
In this embodiment, the variable frequency pump group 5 is composed of a group of variable frequency water pumps.
In this embodiment, the switching valve 7 of the variable frequency pump unit a, the switching valve 8 of the variable frequency pump unit B, the switching valve 9 of the high-level water tank a, and the switching valve 10 of the high-level water tank B are all electric valves.
A method of using a laminar flow cooling water supply apparatus, comprising the steps of:
the first step is as follows: the method comprises the steps that an original high-level water tank 3 is used for supplying water, water in a cold water pool 1 is lifted by a high-level water tank water supply pump 2 to supply water for the high-level water tank 3, the water level of the high-level water tank 3 is guaranteed, the water in the high-level water tank 3 passes through a group of high-level water tank pipelines and self-cleaning filters 4, then enters a laminar flow cooling device A area 11 and a laminar flow cooling device B area 12 through a high-level water tank A area switching valve 9 and a high-level water tank B area switching valve 10, a group of laminar flow injection valves 13 are opened according to the cooling requirement of a rolling line to cool strip steel, accumulated water after cooling flows into a water collecting pit 14, enters a hot water pool 15 through a pipeline, is lifted to a cooling tower 18 through a group of high-speed filters 17 by a lifting pump 16, and then enters the cold water pool 1 after cooling, and the water is recycled;
the second step is that: water is supplied by using a variable frequency pump set 5, the variable frequency pump set 5 takes water from a cold water pool 1, then the water passes through a group of variable frequency pump set pipelines and a self-cleaning filter 6, then the water passes through a switching valve 7 of a region A of the variable frequency pump set and a switching valve 8 of a region B of the variable frequency pump set, enters a region A11 of laminar cooling equipment and a region B12 of the laminar cooling equipment, a group of laminar injection valves 13 are opened according to the cooling requirement of a rolling line to cool strip steel, the accumulated water after cooling flows into a water collecting pit 14, enters a hot water pool 15 through a pipeline, is lifted to a cooling tower 18 through a group of high speed filters 17 by a lifting pump 16, and then enters the cold water pool 1 after cooling, so that the water can be reused;
the third step: when only the high-level water tank 3 is used, the frequency conversion pump set 5 stops running, meanwhile, the switching valve 7 in the area A of the frequency conversion pump set and the switching valve 8 in the area B of the frequency conversion pump set are closed, the switching valve 9 in the area A of the high-level water tank and the switching valve 10 in the area B of the high-level water tank are opened, water is supplied to the area A11 of the laminar flow cooling equipment and the area B12 of the laminar flow cooling equipment, and the field use requirement is met; when the variable-frequency pump set 5 is used for supplying water, the variable-frequency pump set 5 selects whether all the pump sets are started to operate or not according to needs, a switching valve 7 of a region A of the variable-frequency pump set and a switching valve 8 of a region B of the variable-frequency pump set are opened, a switching valve 9 of a region A of a high-level water tank and a switching valve 10 of a region B of the high-level water tank are closed, water is supplied to a region A11 of laminar cooling equipment and a region B12 of laminar cooling equipment through the switching valve 7 of the region A of the variable-frequency pump set and the switching valve 8 of the region B of the variable-frequency pump set, and the field use requirements are met;
the fourth step: when the pipeline steel is produced and the high-level water tank is used for supplying water for cooling, the steel plate cooling hit rate is 40.25%, and when the variable-frequency pump set is used for supplying water, the steel plate cooling hit rate is 68.85%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (4)

1. A laminar flow cooling water supply apparatus characterized in that: the device consists of a cold water tank (1), a high-level water tank water supply pump (2), a high-level water tank (3), a group of high-level water tank pipeline self-cleaning filters (4), a variable frequency pump set (5), a group of variable frequency pump set pipeline self-cleaning filters (6), a variable frequency pump set A-area switching valve (7), a variable frequency pump set B-area switching valve (8), a high-level water tank A-area switching valve (9), a high-level water tank B-area switching valve (10), a laminar flow cooling equipment A-area (11), a laminar flow cooling equipment B-area (12), a group of laminar flow injection valves (13), a water collecting pit (14), a hot water tank (15), a lifting pump (16), a group of high-speed filters (17) and a cooling tower (18), wherein the cold water tank (1) is provided with two water outlet pipelines, one of which is connected with the high-level water tank (3) through the high-level water tank water supply pump (2), and the other of which is connected with the variable frequency pump set of variable frequency pump set (5) and the variable frequency pump set of pipeline self-cleaning filters (6) in sequence, the water outlet of the high-level water tank (3) is connected with the water inlet of a group of high-level water tank pipeline self-cleaning filters (4), the water outlet of the group of high-level water tank pipeline self-cleaning filters (4) is respectively connected with the water inlets of a high-level water tank A-area switching valve (9) and a high-level water tank B-area switching valve (10), the water outlet of a variable frequency pump set pipeline self-cleaning filter (6) is respectively connected with the water inlets of a variable frequency pump set A-area switching valve (7) and a variable frequency pump set B-area switching valve (8), the variable frequency pump set A-area switching valve (7) and the high-level water tank A-area switching valve (9) are both connected with a laminar flow cooling equipment A area (11), the variable frequency pump set B-area switching valve (8) and the high-level water tank B-area switching valve (10) are both connected with a laminar flow cooling equipment B area (12), and the water outlets of the laminar flow cooling equipment A area (11) and the laminar flow cooling equipment B area (12) are both connected with a group of laminar flow injection valves (13), a water collecting pit (14) is arranged below the group of laminar flow injection valves (13), the water collecting pit (14) is sequentially connected with a hot water tank (15), a lifting pump (16), a group of high-speed filters (17) and a cooling tower (18), and a water outlet of the cooling tower (18) is connected with a water inlet of the cold water tank (1).
2. The laminar-cooling water supply apparatus according to claim 1, characterized in that: the variable-frequency pump set (5) is composed of a group of variable-frequency water pumps.
3. The laminar-cooling water supply apparatus according to claim 1, characterized in that: and the frequency conversion pump set A area switching valve (7), the frequency conversion pump set B area switching valve (8), the high-level water tank A area switching valve (9) and the high-level water tank B area switching valve (10) are all electric valves.
4. The use method of the laminar-flow-cooling water supply equipment according to claim 1 is characterized by comprising the following steps:
the first step is as follows: the method comprises the steps that an original high-level water tank (3) is used for supplying water, water in a cold water pool (1) is lifted through a high-level water tank water supply pump (2) to supply water for the high-level water tank (3), the water level of the high-level water tank (3) is guaranteed, the water in the high-level water tank (3) passes through a set of high-level water tank pipeline self-cleaning filters (4) and then enters a high-level water tank A area switching valve (9) and a high-level water tank B area switching valve (10) to enter a laminar flow cooling equipment A area (11) and a laminar flow cooling equipment B area (12), a set of laminar flow injection valves (13) are opened according to the cooling requirement of a rolling line to cool strip steel, the cooled accumulated water flows into a water collecting pit (14), enters a hot water pool (15) through a pipeline, and is lifted through a set of high-speed filters (17) to a cooling tower (18) through a lifting pump (16) to cool and then enter the cold water pool (1), and the water is recycled;
the second step is that: the method comprises the steps that water is supplied by using a variable frequency pump set (5), the variable frequency pump set (5) takes water from a cold water tank (1), passes through a group of variable frequency pump set pipeline self-cleaning filters (6), then passes through a switching valve (7) of a region A of the variable frequency pump set and a switching valve (8) of a region B of the variable frequency pump set, enters a region A (11) of laminar flow cooling equipment and a region B (12) of the laminar flow cooling equipment, opens a group of laminar flow injection valves (13) to cool strip steel according to the cooling requirement of a rolling line, the cooled accumulated water flows into a water collecting pit (14), enters a hot water tank (15) through a pipeline, is lifted to a cooling tower (18) through a group of high speed filters (17) by a lifting pump (16), and then enters the cold water tank (1), and the water is recycled;
the third step: when only the high-level water tank (3) is used, the frequency conversion pump set (5) stops running, meanwhile, a switching valve (7) in a region A of the frequency conversion pump set and a switching valve (8) in a region B of the frequency conversion pump set are closed, a switching valve (9) in the region A of the high-level water tank and a switching valve (10) in the region B of the high-level water tank are opened, water is supplied to a region A (11) of the laminar flow cooling equipment and a region B (12) of the laminar flow cooling equipment, and the field use requirements are met; when the frequency conversion pump set (5) is used for supplying water, the frequency conversion pump set (5) selects whether to be completely started to operate according to needs, a switching valve (7) of an area A of the frequency conversion pump set and a switching valve (8) of an area B of the frequency conversion pump set are opened, a switching valve (9) of an area A of a high-level water tank and a switching valve (10) of an area B of the high-level water tank are closed, and water is supplied to an area A (11) of laminar cooling equipment and an area B (12) of laminar cooling equipment through the switching valve (7) of the area A of the frequency conversion pump set and the switching valve (8) of the area B of the frequency conversion pump set, so that the field use requirements are met;
the fourth step: when the laminar cooling is low in flow and the water pressure requirement is not high, water is supplied through the high-level water tank (3); when laminar cooling requires high-flow and high-pressure cooling, water is supplied for laminar cooling through a variable frequency pump set (5); the actual requirements of on-site production are met, and when the variable frequency pump set (5) supplies water, the pressure of 0.2MPa or 0.5MPa is selected to replace the high-level water tank (3) to supply water for laminar cooling according to the pressure requirement.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277781A (en) * 1995-04-04 1996-10-22 Ebara Corp Water feeding device
CN2785741Y (en) * 2005-04-28 2006-06-07 中冶南方工程技术有限公司 Combined water supplying and distributing device for controlled cooling of black strip
CN202030792U (en) * 2011-03-17 2011-11-09 南京钢铁股份有限公司 Water processing device for medium plate quenching line
CN203569148U (en) * 2013-10-15 2014-04-30 南京钢铁股份有限公司 Ultrafast cooling and comprehensive water treatment device for medium and heavy plate
CN204429866U (en) * 2015-01-09 2015-07-01 中冶南方工程技术有限公司 A kind of medium plate cooling after rolling system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277781A (en) * 1995-04-04 1996-10-22 Ebara Corp Water feeding device
CN2785741Y (en) * 2005-04-28 2006-06-07 中冶南方工程技术有限公司 Combined water supplying and distributing device for controlled cooling of black strip
CN202030792U (en) * 2011-03-17 2011-11-09 南京钢铁股份有限公司 Water processing device for medium plate quenching line
CN203569148U (en) * 2013-10-15 2014-04-30 南京钢铁股份有限公司 Ultrafast cooling and comprehensive water treatment device for medium and heavy plate
CN204429866U (en) * 2015-01-09 2015-07-01 中冶南方工程技术有限公司 A kind of medium plate cooling after rolling system

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