CN111677044B - Regional constant pressure water supply system of hot continuous rolling line casting machine - Google Patents
Regional constant pressure water supply system of hot continuous rolling line casting machine Download PDFInfo
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- CN111677044B CN111677044B CN202010392675.0A CN202010392675A CN111677044B CN 111677044 B CN111677044 B CN 111677044B CN 202010392675 A CN202010392675 A CN 202010392675A CN 111677044 B CN111677044 B CN 111677044B
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- E03—WATER SUPPLY; SEWERAGE
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Abstract
The embodiment of the invention provides a constant-pressure water supply system for a hot continuous rolling line casting machine region, which comprises: the water supply system comprises a water inlet pipeline, a main water supply pipeline, a first constant pressure water supply pipeline, a branch water supply pipeline, a second constant pressure water supply pipeline and a water drainage pipeline; the water inlet pipeline is connected with the first end of the main water supply pipeline through a power frequency pump; the first ends of the first constant-pressure water supply pipeline and the branch water supply pipeline are both connected with the second end of the main water supply pipeline; the second constant-pressure water supply pipeline and the water discharge pipeline are both connected with the second end of the water distribution and supply pipeline; the first constant pressure water supply pipeline is provided with a first pressure sensor, the water distribution pipeline is provided with a first regulating valve, the second constant pressure water supply pipeline is provided with a second pressure sensor, and the water drain pipeline is provided with a second regulating valve. The water supply system of the invention optimizes the pipeline structure of the water supply system, reduces the construction and maintenance cost, and saves water and electricity.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a constant-pressure water supply system in a hot continuous rolling line casting machine area.
Background
In the production process of the hot continuous rolling line, the hot charging and hot conveying process can greatly reduce the fuel consumption of the heating furnace and the emission of pollutants, and is an important means for realizing green manufacturing in the steel industry. In the realization of the hot charging and hot conveying process, the control of the cooling rate in the continuous casting process of the casting blank is the key point. To achieve control of different cooling rates, the caster zones place different demands on the pressure of the process water. Different process water pressures are realized, and the traditional method is to configure a plurality of sets of different water systems and supply water by using a variable frequency pump so as to realize the on-line constant pressure regulation of the process water.
However, in the conventional mode, a plurality of sets of water supply pumps need to be configured, a large number of pipelines need to be arranged in a limited space, the arrangement difficulty is high, and the construction and maintenance costs are high.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a constant pressure water supply system in a hot continuous rolling line casting machine area, which optimizes a pipeline structure of the water supply system, reduces construction and maintenance costs, and saves water and electricity.
In a first aspect, the present application provides the following technical solutions through an embodiment:
a constant pressure water supply system for a hot continuous rolling line caster zone comprising:
the water supply system comprises a water inlet pipeline, a main water supply pipeline, a first constant pressure water supply pipeline, a branch water supply pipeline, a second constant pressure water supply pipeline and a water drainage pipeline;
the water inlet pipeline is connected with the first end of the main water supply pipeline through a power frequency pump; the first ends of the first constant-pressure water supply pipeline and the branch water supply pipeline are both connected with the second end of the main water supply pipeline; the second constant-pressure water supply pipeline and the water discharge pipeline are both connected with the second end of the water distribution and supply pipeline;
the first constant pressure water supply pipeline is provided with a first pressure sensor, the water distribution pipeline is provided with a first regulating valve, the second constant pressure water supply pipeline is provided with a second pressure sensor, and the water drain pipeline is provided with a second regulating valve.
Preferably, the sum of the water discharge amounts of the first constant-pressure water supply line and the second constant-pressure water supply line is smaller than the water discharge amount of the main water supply line.
Preferably, the method further comprises the following steps: a water return pipeline; the water return pipeline is connected to the main water supply pipeline, and a third regulating valve is arranged on the water return pipeline.
Preferably, a water outlet of the water return pipeline is connected to a water source of a water inlet of the water inlet pipeline.
Preferably, the sum of the water discharge amount of the drain pipeline and the water return pipeline is greater than or equal to the water discharge amount of the main water supply pipeline.
Preferably, the third regulating valve is an overpressure regulating valve.
Preferably, the first regulating valve and the second regulating valve are both pneumatic or electric regulating valves.
Preferably, the lift of the power frequency pump is greater than or equal to 100 m.
Preferably, the water supply amount of the industrial frequency pump is 1000m3/h。
Preferably, the water pressure in the first constant-pressure water supply line is greater than the water pressure in the second constant-pressure water supply line.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
by the water supply system structure, when the power frequency pump works, water is pumped from the water inlet pipeline, water flows to the first constant-pressure water supply pipeline and the branch water supply pipeline through the power frequency pump and the main water supply pipeline respectively, and at the moment, the first regulating valve on the branch water supply pipeline can be regulated and the first pressure sensor can be observed, so that the first pressure sensor reaches the required pressure, and the constant-pressure water supply of the first constant-pressure water supply pipeline is realized; then the second governing valve on the adjustment water release pipeline makes the meeting with the requirements of the pressure on the second pressure sensor, can realize that the waste water of exhaust (can understand, the branch water supply pipeline is the waste water that first constant pressure water supply pipeline did not use) gets into in the second constant pressure water supply pipeline and forms stable pressure when first constant pressure water supply pipeline carries out the constant pressure water supply, realizes that the double-circuit supplies water. The constant-pressure water supply system optimizes the control pipeline, and reduces the construction and maintenance cost; the structure realizes the utilization of waste water and double-path water supply, greatly improves the utilization efficiency of process water, and reduces the consumption of water and electricity.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a constant pressure water supply system in a hot continuous rolling line casting machine according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram illustrating a constant pressure water supply system 10 of a hot continuous rolling line casting machine region according to the present embodiment, where the constant pressure water supply system 10 of the hot continuous rolling line casting machine region includes: the water supply system comprises a water inlet pipeline a, a main water supply pipeline b, a first constant-pressure water supply pipeline d, a branch water supply pipeline e, a second constant-pressure water supply pipeline f and a water drainage pipeline g.
The water inlet pipeline a is connected with the first end of the main water supply pipeline b through the power frequency pump 2; the first ends of the first constant-pressure water supply pipeline d and the branch water supply pipeline e are both connected with the second end of the main water supply pipeline b; the second constant-pressure water supply pipeline f and the water discharge pipeline g are both connected with the second end of the water distribution pipeline e; the first constant-pressure water supply pipeline d is provided with a first pressure sensor 4, the branch water supply pipeline e is provided with a first regulating valve 5, the second constant-pressure water supply pipeline f is provided with a second pressure sensor 6, and the drain pipeline g is provided with a second regulating valve 7.
Through the structure of the water supply system 10, when the power frequency pump 2 works, the water inlet pipeline a pumps water from the water storage tank 1, water flows to the first constant-pressure water supply pipeline d and the branch water supply pipeline e through the power frequency pump 2 and the main water supply pipeline b respectively, and at the moment, the first regulating valve 5 on the branch water supply pipeline e can be regulated and the first pressure sensor 4 is observed, so that the first pressure sensor 4 reaches the required pressure, and the constant-pressure water supply of the first constant-pressure water supply pipeline d is realized; then, the second regulating valve 7 on the drain pipeline g is adjusted to enable the pressure on the second pressure sensor 6 to meet the requirement, so that the wastewater discharged when the first constant-pressure water supply pipeline d performs constant-pressure water supply (it can be understood that the water distribution pipeline e is the unused wastewater of the first constant-pressure water supply pipeline d) enters the second constant-pressure water supply pipeline f and forms stable pressure, and double-channel water supply is realized. The constant-pressure water supply system 10 optimizes the structure of a control pipeline, and reduces the construction and maintenance cost; the structure realizes the utilization of waste water and double-path water supply, greatly improves the utilization efficiency of process water, and reduces the consumption of water and electricity.
Further, satisfy the displacement sum that first constant pressure water supply line d and second constant pressure water supply line f is less than the displacement of main water supply line b when setting up pipeline and power frequency pump 2 in this embodiment. Can guarantee like this through the displacement of adjusting the outlet pipe way g, can make the water pressure homoenergetic in first constant pressure water supply pipe way d and the second constant pressure water supply pipe way f satisfy the operational requirement.
Further, in this embodiment, the method further includes: a water return pipeline c; the water return pipeline c is connected to the main water supply pipeline b, and a third regulating valve 3 and a water return pipeline c are arranged on the water return pipeline c. The water outlet of the water return pipeline c is connected to the water source of the water inlet pipeline a. When the water pressure that first water supply pipeline and second water supply pipeline need is less, the maximum regulating variable of outlet pipe way g can not satisfy the regulation requirement, and the third governing valve 3 on the accessible return water pipeline c carries out hydraulic regulation, has guaranteed the stability that the water pressure of second water supply pipeline was adjusted through mutually supporting of outlet pipe way g and return water pipeline c. Meanwhile, water in the main water supply pipeline b is led back to the water storage tank 1 through the water return pipeline c, so that the water consumption is saved.
In addition, generally, the length of the main water supply pipeline b can reach hundreds of meters, and meanwhile, the water discharge amount of the water discharge pipeline g is influenced by the first constant-pressure water supply pipeline d and the branch water supply pipeline e, so that the water amount is often not large; if the water in the drain pipe g is led back to the reservoir, higher construction and maintenance costs are incurred, and therefore, in this embodiment, the water in the drain pipe g can be discharged as waste water to improve the economy and stability of the overall system 10.
Furthermore, the sum of the water discharge pipeline g and the water return pipeline c is more than or equal to the water discharge of the main water supply pipeline b. Therefore, the first constant-pressure water supply pipeline d and the second constant-pressure water supply pipeline f can be guaranteed to be capable of achieving accurate water pressure adjustment when the water pressure requirement is small.
In the present embodiment, the first regulating valve 5 and the second regulating valve 7 are both pneumatic or electric regulating valves to realize automatic control. The third regulating valve 3 is an overpressure regulating valve to limit the water pressure of the first constant-pressure water supply pipeline d and the water pressure of the branch water supply pipeline e, and the water supply pressure of the first constant-pressure water supply pipeline d and the water supply pressure of the second constant-pressure water supply pipeline f are guaranteed to be stable and adjustable.
Further, when constant pressure water supply is performed, the used water supply system 10 should satisfy that the water pressure in the first constant pressure water supply pipeline d is greater than the water pressure in the second constant pressure water supply pipeline f, and by controlling the pressure difference between the first constant pressure water supply pipeline d and the second constant pressure water supply pipeline f, the waste water discharged when the water pressure in the first constant pressure water supply pipeline d is constant is utilized, so that the waste water can form stable water pressure in the second constant pressure water supply pipeline f.
The lift of the line frequency pump 2 used in the hot continuous rolling line casting machine region in this embodiment is 100m or more, and the water supply amount is 1000m or more3/h。
Specifically, the following examples are given:
for example, the example is a water supply system 10 operating in a relatively balanced mode. The lift of the power frequency pump 2 is 100m, and the water supply amount is 1000m3H is used as the reference value. The first constant pressure water supply line d maintains the amount of water required for the constant pressure (P1) at 500m3H, a pressure P1 of 0.8MPa, a second constant pressure water supply line f requiring a quantity of water of 400m for maintaining a constant pressure (P2)3The pressure P2 was 0.6 MPa. Maximum drainage capacity of 400m of drainage pipeline g3/h。
After the power frequency pump 2 is started, the overpressure regulating valve (third regulating valve 3) is in a closed state, and 1000m provided by the power frequency pump 23The water/h is all delivered to a first constant pressure water supply line d and a branch water supply line e from a main water supply line b. Wherein the water pressure of the first constant pressure water supply line d (i.e. the water pressure detected by the first pressure sensor 4) is controlled to 0.8MPa by the adjustment of the first adjusting valve 5, and the water discharge of the first constant pressure water supply line d is 500m of the required water discharge3H, excess 500m3The water/h continues downstream through the branched water supply line e by means of the first regulating valve 5. The water pressure of the second constant-pressure water supply line f (i.e., the water pressure detected by the second pressure sensor 6) is controlled to 0.6MPa by the regulation of the second regulating valve 7, and the discharge amount of the second constant-pressure water supply line f is 400m as required3H, excess of 100m3H ofThe water is discharged through the second regulating valve 7 through the drain line g. So far, the first constant pressure water supply pipeline d is 500m under the pressure of 0.8MPa3H water supply, a second constant pressure water supply line f is 400m under the pressure of 0.6MPa3H water supply.
In case two, the water system is in non-equilibrium mode operation. The lift of the power frequency pump 2 is 100m, and the water supply amount is 1000m3H is used as the reference value. The water quantity required by the first constant-pressure water supply pipeline d is 300m when the pressure is constant3H, the pressure P1 of the first constant pressure water supply pipeline d is 0.8MPa, and the water demand of the second constant pressure water supply pipeline f is 200m when the pressure is constant3The pressure P2 of the second constant-pressure water supply line f was 0.6 MPa. Maximum drainage capacity of 400m of drainage pipeline g3/h。
After the power frequency pump 2 is started, the third regulating valve 3 is initially in a closed state, and 1000m provided by the power frequency pump 23The water/h is all delivered to a first constant pressure water supply line d and a branch water supply line e from a main water supply line b. Wherein the water pressure of the first constant pressure water supply line d (i.e. the water pressure detected by the first pressure sensor 4) is controlled to 0.8MPa by the adjustment of the second adjusting valve 7, and the water discharge of the first constant pressure water supply line d is 300m of the required water discharge3H, excess 700m3The water/h continues downstream via the branched water supply line e via the second control valve 7. Since the discharge amount of the second constant-pressure water supply line f is required to be 200m3H, excess 500m3The water per hour exceeds the maximum water discharge capacity of the water discharge pipeline g by 400m3H, when the second regulating valve 7 is opened to the maximum, the pressure of the water supply system 10 is gradually increased, the overpressure regulating valve (the third regulating valve 3) is triggered to be opened, and the surplus is about 100m3The/h water is discharged into the reservoir 1 through a water return pipeline c through an overpressure regulating valve.
In the third case, the water system is operated in the water shortage mode, and if the operation state of the mode occurs, the system 10 is possible to have a fault, and the troubleshooting and the repairing should be performed. Specifically, when the lift of the power frequency pump 2 is 100m, the water supply amount is 1000m3H is used as the reference value. The water demand of the first constant-pressure water supply pipeline d is 600m3H, the pressure P1 of the first constant-pressure water supply pipeline d is 0.8MPa, and the water demand of the second constant-pressure water supply pipeline f is 500m3H, ofThe f pressure P2 of the two constant pressure water supply lines is 0.6 MPa. Maximum drainage capacity of 400m of drainage pipeline g3/h。
After the power frequency pump 2 is started, the third regulating valve 3 is in a closed state, and 1000m provided by the power frequency pump 23The water/h is all delivered to a first constant pressure water supply line d and a branch water supply line e from a main water supply line b. Wherein the water pressure of the first constant pressure water supply line d (i.e. the water pressure detected by the first pressure sensor 4) is controlled to 0.8MPa by the adjustment of the first adjusting valve 5, and the water discharge of the first constant pressure water supply line d is 600m of the required water discharge3H, excess of 400m3The water/h continues downstream through the branched water supply line e by means of the first regulating valve 5. Since the discharge amount of the second constant-pressure water supply line f is required to be 500m3H, when the second constant pressure supply line f is completely closed, to ensure that the second constant pressure supply line f has the maximum water volume under the current operating conditions. At this time, the water supply amount of the second constant-pressure water supply line f is in an insufficient state.
In summary, in the water supply system 10 of the present embodiment, the water inlet pipeline a is connected to the first end of the main water supply pipeline b through the power frequency pump 2; the first ends of the first constant-pressure water supply pipeline d and the branch water supply pipeline e are both connected with the second end of the main water supply pipeline b; the second constant-pressure water supply pipeline f and the water discharge pipeline g are both connected with the second end of the water distribution pipeline e; a first pressure sensor 4 is arranged on the first constant-pressure water supply pipeline d, a first regulating valve 5 is arranged on the branch water supply pipeline e, a second pressure sensor 6 is arranged on the second constant-pressure water supply pipeline f, and a second regulating valve 7 is arranged on the water discharge pipeline g; when the power frequency pump 2 supplies water, the double-way constant-pressure water supply on the first constant-pressure water supply pipeline d and the second constant-pressure water supply pipeline f is realized through the adjustment of the first adjusting valve 5 and the second adjusting valve 7, the structure of the water supply pipeline is optimized, the construction cost and the maintenance cost are reduced, and the consumption of water and electricity is reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A constant pressure water supply system for a hot continuous rolling line caster area, comprising:
the water supply system comprises a water inlet pipeline, a main water supply pipeline, a first constant pressure water supply pipeline, a branch water supply pipeline, a second constant pressure water supply pipeline and a water drainage pipeline;
the water inlet pipeline is connected with the first end of the main water supply pipeline through a power frequency pump; the first ends of the first constant-pressure water supply pipeline and the branch water supply pipeline are both connected with the second end of the main water supply pipeline; the second constant-pressure water supply pipeline and the water discharge pipeline are both connected with the second end of the water distribution and supply pipeline;
a first pressure sensor is arranged on the first constant pressure water supply pipeline, a first regulating valve is arranged on the water distribution pipeline, a second pressure sensor is arranged on the second constant pressure water supply pipeline, and a second regulating valve is arranged on the water drain pipeline;
the water pressure in the first constant-pressure water supply pipeline is greater than the water pressure in the second constant-pressure water supply pipeline;
and the sum of the water discharge of the first constant-pressure water supply pipeline and the second constant-pressure water supply pipeline is less than the water discharge of the main water supply pipeline.
2. The constant pressure water supply system of a hot continuous rolling line caster area of claim 1, further comprising: a water return pipeline; the water return pipeline is connected to the main water supply pipeline, and a third regulating valve is arranged on the water return pipeline.
3. The system of claim 2, wherein the water outlet of the return line is connected to a water source at the water inlet of the water inlet line.
4. The system of claim 2, wherein the sum of the water discharge of the drain line and the return line is equal to or greater than the water discharge of the main water supply line.
5. The constant pressure water supply system of the hot continuous rolling line caster area as claimed in claim 2, wherein said third regulating valve is an overpressure regulating valve.
6. The constant pressure water supply system of the hot continuous rolling line caster area of claim 1, wherein said first regulating valve and said second regulating valve are pneumatic or electric regulating valves.
7. The constant pressure water supply system in the area of the hot continuous rolling line casting machine according to claim 1, wherein the lift of the line frequency pump is 100m or more.
8. The system of claim 1, wherein the line frequency pump supplies 1000m of water3/h。
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| CN203750996U (en) * | 2014-01-14 | 2014-08-06 | 中冶南方工程技术有限公司 | Turbid circulating water supply system for rolling mill in hot-rolling rod and wire production line |
| CN104525885A (en) * | 2014-12-31 | 2015-04-22 | 中冶东方工程技术有限公司 | Cast steel strong cooling spraying system and strong cooling technology method |
| CN209989873U (en) * | 2019-03-26 | 2020-01-24 | 魏远良 | Power frequency constant-pressure emergency water supply device of intelligent water supply system |
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| FR2978211B1 (en) * | 2011-07-19 | 2013-08-23 | Snecma | METHOD FOR MONITORING A PRESSURE RELIEF VALVE OF A FUEL INJECTION CIRCUIT FOR TURBOMACHINE |
| CN205996146U (en) * | 2016-08-16 | 2017-03-08 | 福建圣力智能工业科技股份有限公司 | A kind of conticaster secondary cooling water pressure automatic adjusting device |
| CN108842849A (en) * | 2018-09-14 | 2018-11-20 | 广东工业大学 | A kind of tier building water system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203750996U (en) * | 2014-01-14 | 2014-08-06 | 中冶南方工程技术有限公司 | Turbid circulating water supply system for rolling mill in hot-rolling rod and wire production line |
| CN104525885A (en) * | 2014-12-31 | 2015-04-22 | 中冶东方工程技术有限公司 | Cast steel strong cooling spraying system and strong cooling technology method |
| CN209989873U (en) * | 2019-03-26 | 2020-01-24 | 魏远良 | Power frequency constant-pressure emergency water supply device of intelligent water supply system |
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