CN216501554U - Laminar cooling water saving system - Google Patents
Laminar cooling water saving system Download PDFInfo
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- CN216501554U CN216501554U CN202122521508.4U CN202122521508U CN216501554U CN 216501554 U CN216501554 U CN 216501554U CN 202122521508 U CN202122521508 U CN 202122521508U CN 216501554 U CN216501554 U CN 216501554U
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Abstract
The utility model relates to the field of stable water outlet and energy conservation of a water tank. The utility model provides a laminar flow cooling water saving system, includes steady voltage output water tank and shower nozzle, steady voltage output water tank includes outer box, interior box, first water pump, water level measurement device, and interior box, first water pump and water level measurement device are installed in outer box inside, and first water pump and water level measurement device are in the interior box outside, have external water source import in the outer box, and interior bottom half has the delivery port, and the delivery port passes through the pipe connection shower nozzle, and external water source passes through the external water source import of second water pump pipe connection. The utility model controls the height of the water level of the inner water tank through overflow, thereby ensuring that the pressure of water discharged from the water outlet is the same.
Description
Technical Field
The utility model relates to the field of stable water outlet and energy conservation of a water tank.
Background
The water supply mode of the laminar cooling system of the hot continuous rolling production line is as follows: water is firstly sent to a high-level water tank beside the machine by a water supply pump, and then the water is supplied to a water supply main pipe and a cooling header by the water tank. In order to meet the CT temperature process control requirements, the water quantity of each water spraying header pipe is required to be consistent, the water pressure is required to be basically constant (the liquid level of a high-level water tank is basically constant), and the water supply is required to be sufficient. When the liquid level of the water tank is ultrahigh, directly discharging the redundant water into the backwater ditch through the overflow pipeline; when the liquid level is too low, the water supply amount needs to be increased to ensure the liquid level.
The liquid level fluctuation of the high-level water tank is controlled within +/-200 mm, the volume formed by the liquid level fluctuation is an effective volume, water can be supplied to a rolling line when steel passes, and the water level is reduced; water is stored in the steel passing interval, and the water level rises.
The most ideal state is: the water consumption of the laminar cooling process is the sum of the water supply pump and the effective volume of the high-level water tank, and the water supply pump supplies water with the effective volume at intervals. Can be formulated as:
ideally QT1= Q1T1+ Q1T2 in formula: q-water flow (m 3/h) for laminar cooling process; t1-cooling time(s) of the strip steel; q1-water supply flow (m 3/h) of the water pump; t2-time interval(s) between successive rolling of two pieces of steel.
Namely: water flow QT1= water pump flow Q1 per total rolling time of steel (T1 + T2) for laminar cooling process
However, in the actual production process, laminar cooling is a system with the largest water consumption change in each cooling water system, and because the rolled steel types are different, the specifications are different, the speeds are different, the water temperatures are different, the CT control requirements are different, and the like, the required cooling strengths are also different, so that the water consumption is different, and the water consumption is greatly changed.
Typically, the maximum water supply capacity of the laminar cooling water supply pump set is designed with reference to the maximum cooling capacity required by the rolling line, which is slightly less than the maximum cooling capacity. Therefore, the full-load operation of the water supply system is reasonable only when the steel grade with the largest water consumption is rolled, when other steel grades are rolled, the Q1T1+ Q1T2 is more than QT1, redundant water supply can only be directly discharged back to the water channel through an overflow pipe of the high-level water tank, and a large amount of water overflows to cause waste and consume water and electricity.
In addition, the quantity and the speed of water sprayed by the laminar flow cooling spray head have influence on the performance of a cooled steel plate, the higher the performance of the steel plate is, the water spraying of the steel plate needs to strictly limit the flow, the existing water spraying can be adopted to realize accurate control of water spraying, and at most, the total amount of water spraying can only be controlled, so that the cooling conditions of a plurality of positions of the steel plate cannot meet the requirements, and finally, the heat treatment needs to be carried out again.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: how to provide a stable controllable laminar flow cooling water jet equipment, furthest sprays laminar flow cooling water according to setting for the requirement to save the water and improve the performance after the steel sheet processing.
The technical scheme adopted by the utility model is as follows: the utility model provides a laminar flow cooling water saving system, includes steady voltage output water tank and shower nozzle, steady voltage output water tank includes outer box (1), interior box (8), first water pump, water level measuring device, interior box (8), first water pump and water level measuring device install inside outer box (1), first water pump and water level measuring device are in the interior box (8) outside, there is external water source import (2) in outer box (1), there is delivery port (4) interior box (8) bottom, delivery port (4) are through the pipe connection shower nozzle, external water source passes through external water source import (2) of second water pump pipe connection.
The number of the spray heads is multiple, the number of the water outlets (4) is the same as that of the spray heads, and each water outlet (4) is connected with one spray head through pipelines with the same length and the same specification.
The first water pump has two for one use.
The inner box body (8) is divided into two sub-water tanks by a central partition plate (5), a first water pump is connected with the outer water tank and one sub-water tank without a water outlet (4) through a pipeline, the water outlet (4) is arranged at the bottom of the other sub-water tank, and a barrier plate (7) is arranged at the upper part of the partition plate (5).
The water level measuring device comprises a cylinder (11) with the bottom communicated with the outer water tank, a floater (10) and a pressure sensor (9), the floater (10) and the pressure sensor (9) are connected through a rigid straight rod, and the pressure sensor (9) is electrically connected with a first water pump and a second water pump.
The first water pump and the second water pump are frequency conversion water pumps.
The utility model has the beneficial effects that: the utility model controls the height of the water level of the inner water tank through overflow, thereby ensuring that the pressure intensity of water discharged from the water outlet is the same; the variable-frequency water pump can more accurately control the water pumping amount; the utility model further avoids the impact of water inlet on the water outlet by adopting the two sub water tanks for overflowing, thereby further ensuring the stable pressure of the water outlet. The laminar flow water of the utility model can not cause waste.
Drawings
FIG. 1 is a schematic diagram of a pressure stabilizing output water tank according to the present invention;
FIG. 2 is a schematic view of a showerhead arrangement;
the water pump comprises an outer box body 1, an external water source inlet 2, an external water source inlet 3, a standby water pump of a first water pump, a water outlet 4, a water outlet 5, a partition plate 6, a real-time water pump of the first water pump, a barrier plate 7, an inner box body 8, an inner box body 9, a pressure sensor 10, a floater 11 and a cylinder.
Detailed Description
Example 1
A laminar cooling water-saving system comprises a pressure-stabilizing output water tank and a spray head. The shower nozzle is for spraying laminar flow cooling's shower nozzle, adopts current shower nozzle that sprays laminar flow cooling in this embodiment.
The pressure-stabilizing water output tank comprises an outer tank body 1, an inner tank body 8, a first water pump and a water level measuring device. The water level measuring device in this embodiment adopts an existing water level measuring device.
In this embodiment, the outer box 1 is a rectangular water tank with an upper opening, and the inner box 8 is welded to the bottom of the outer box 1 at the center of the outer box 1 by adopting four plates, so that the outer box 1 and the inner box 8 which are isolated from each other are formed.
There is external water source import 2 in the outer box 1, and there is delivery port 4 bottom 8 inner box, and delivery port 4 passes through the pipe connection shower nozzle, and external water source passes through second water pump pipe connection external water source import 2.
During the use, at first the second water pump is from the external laminar flow cooling water suction in outer water tank, then the laminar flow cooling water rethread first water pump suction in the outer water tank is in the inner water tank, pay attention to and keep the top of inner water tank in the overflow state all the time. The water outlet 4 at the bottom of the inner box body 8 flows into the spray head through a pipeline and is sprayed on the steel plate.
Note that: valves are arranged on all the pipelines, and the valves are omitted for convenience.
Example 2
The difference from the embodiment 1 is that: the shower nozzle has a plurality ofly, and 4 quantity of delivery ports are the same with the shower nozzle, and every delivery port 4 passes through the shower nozzle of equal length with the pipeline connection of specification. The number and the layout of the spray heads adopt the existing number and the existing layout. In this embodiment, the number and the layout of the nozzles are not required, only because the nozzles are not the utility model point of this patent, and the contents of the prior art are adopted.
Example 3
The difference from the embodiment 2 is that: the first water pump has two spare uses, guarantees that when one of them water pump goes wrong, spare water pump can accomplish normal work.
Example 4
The difference from the example 3 is that: the inner box body 8 is divided into two sub water tanks by a central partition plate 5, the first water pump is connected with the outer water tank and one sub water tank without the water outlet 4 through a pipeline, the water outlet 4 is arranged at the bottom of the other sub water tank, and the upper part of the partition plate 5 is provided with a fence plate 7.
The purpose that interior box 8 divide into two sub-tanks is to avoid the water pump to draw when water the impact that water intake caused the delivery port to the pressure stability of water is guaranteed to the progress. The lower part of the partition plate 5 is a solid plate which is watertight, and the upper part of the partition plate is a fence plate 7 which can realize communication, so that water overflows from one sub-water tank to the other sub-water tank and then overflows to the outer box body 1.
Example 5
The difference from the example 4 lies in: the water level measuring device comprises a cylinder 11, a floater 10 and a pressure sensor 9, wherein the bottom of the cylinder is communicated with the outer water tank, the floater 10 is connected with the pressure sensor 9 through a rigid straight rod, and the pressure sensor 9 is electrically connected with the first water pump and the second water pump.
The advanced cylinder 11 adopts a cylinder wall with numerous small holes on the cylinder wall, and further enhances the accuracy of measurement.
The water level measuring device measures the upper limit and the lower limit of the water level, when the upper limit is reached, the second water pump stops water inflow, and when the lower limit is reached, the second water pump accelerates water outflow.
Example 6
The difference from the example 6 lies in: the first water pump and the second water pump are frequency conversion water pumps. The variable frequency water pump can adjust the water pumping amount of the water pump as required, and current instability caused by continuous direct starting and stopping is avoided.
Example 7
The difference from example 7 is that: the external water source is directly pumped into the sub-water tank without the water outlet.
Example 8
And the PLC is adopted for control, and the pressure sensor 9, the first water pump and the second water pump are all trained on the PLC.
And calculating the cooling water amount required by each steel grade according to the laminar cooling CT temperature control models of different steel grades.
CT temperature control model: the method is a software program which controls the cooling rate and the temperature of the strip steel in a laminar cooling area so as to reach the target coiling temperature and ensure the performance and the shape of the strip steel.
The CT temperature control model comprises: software, PLC systems, control cabinets, actuators (e.g., solenoid valves), cooling water control valves, cooling headers, and the like.
CT temperature control model principle: the cooling intensity, the plate strip thickness, the rolling mill speed, the thermal characteristic, the parameters of cooling equipment and the like are integrated, and the water amount and the intensity of cooling water are determined through automatic calculation, so that the cooling rate and the temperature requirements of the strip steel are met.
A variable frequency control system is added to a motor of the water supply pump set, and the rotating speed and the water supply amount of the water pump are changed through the change of the rotating speed of the motor.
Frequency conversion control system: including analog signal inputs, frequency converters, communication functions, etc.
The CT temperature control model gives an analog quantity signal to the variable frequency control system
The flow of the water pump corresponding to different rotating speeds of the motor under different frequencies is tested, and the flow is divided into a plurality of stages from the minimum flow to the rated flow of the water pump for the convenience of control.
The cooling water quantity required by each steel grade corresponds to the flow of each level of the water pump, and the rotating speed of the motor and the variable frequency control parameters are determined.
When different steel grades are rolled, frequency conversion control parameters of a water supply pump are set according to a laminar cooling CT temperature control model, and water supply is preset to realize water supply according to needs. In the process, the variable frequency control parameters of the water supply pump can be trimmed through the model self-learning function, and the method is more accurate.
The model self-learning function is a necessary function of the CT temperature control model, can automatically correct the defects of the original control software and improve the accuracy.
The self-learning function of the model: when different steel grades are produced, the PLC can automatically set the cooling input water quantity and intensity, the actual temperature is obtained through a temperature detector arranged at the tail end of laminar cooling, and the actual temperature is compared with the set temperature, if the actual temperature exceeds the allowed range, the PLC can control the increase or decrease of the cooling water quantity to meet the set requirement, the model is modified according to the actual temperature, and the modified model is memorized and can be automatically input during the next secondary production.
In order to prevent the problem of large water consumption, the variable frequency speed rise is slow, when the rolling mill bites steel, a speed rise signal is given to the frequency converter, meanwhile, a valve connected with a large water outlet is opened, after the steel is thrown, the signal is removed, and normal control is switched to.
Claims (6)
1. A laminar cooling water saving system is characterized in that: including steady voltage output water tank and shower nozzle, steady voltage output water tank includes outer box (1), interior box (8), first water pump, water level measurement device, interior box (8), first water pump and water level measurement device install inside outer box (1), box (8) outside in first water pump and water level measurement device are in, there is external water source import (2) in outer box (1), there is delivery port (4) bottom interior box (8), delivery port (4) are through the pipe connection shower nozzle, external water source passes through second water pump pipe connection external water source import (2).
2. The laminar cooling water conservation system according to claim 1, characterized in that: the number of the spray heads is multiple, the number of the water outlets (4) is the same as that of the spray heads, and each water outlet (4) is connected with one spray head through pipelines with the same length and the same specification.
3. The laminar cooling water conservation system according to claim 1, characterized in that: the first water pump has two for one use.
4. The laminar cooling water conservation system according to claim 1, characterized in that: the inner box body (8) is divided into two sub-water tanks by a central partition plate (5), a first water pump is connected with the outer water tank and one sub-water tank without a water outlet (4) through a pipeline, the water outlet (4) is arranged at the bottom of the other sub-water tank, and a barrier plate (7) is arranged at the upper part of the partition plate (5).
5. The laminar cooling water conservation system according to claim 1, characterized in that: the water level measuring device comprises a cylinder (11) with the bottom communicated with the outer water tank, a floater (10) and a pressure sensor (9), the floater (10) and the pressure sensor (9) are connected through a rigid straight rod, and the pressure sensor (9) is electrically connected with a first water pump and a second water pump.
6. The laminar cooling water conservation system according to claim 1, characterized in that: the first water pump and the second water pump are frequency conversion water pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122521508.4U CN216501554U (en) | 2021-10-20 | 2021-10-20 | Laminar cooling water saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122521508.4U CN216501554U (en) | 2021-10-20 | 2021-10-20 | Laminar cooling water saving system |
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| Publication Number | Publication Date |
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| CN216501554U true CN216501554U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122521508.4U Active CN216501554U (en) | 2021-10-20 | 2021-10-20 | Laminar cooling water saving system |
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| CN (1) | CN216501554U (en) |
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2021
- 2021-10-20 CN CN202122521508.4U patent/CN216501554U/en active Active
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