CN114278546A - Optimized control method for blast furnace pump set management based on step7 - Google Patents
Optimized control method for blast furnace pump set management based on step7 Download PDFInfo
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- CN114278546A CN114278546A CN202111469740.6A CN202111469740A CN114278546A CN 114278546 A CN114278546 A CN 114278546A CN 202111469740 A CN202111469740 A CN 202111469740A CN 114278546 A CN114278546 A CN 114278546A
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Abstract
The invention relates to an optimized control method for blast furnace pump set management based on step7, which comprises the following steps: setting a priority starting sequence of each pump; judging whether the standby pump meets standby conditions and starting conditions, wherein the standby conditions are that the pump does not run, has no fault signal and no starting signal and is in a remote control state, and the starting conditions are that the pump stops running due to fault or on-site remote/local switching or fails to start; and when the standby condition and the starting condition are met, starting the standby pump according to the priority starting sequence. By adopting the optimization method, the standby pump can be started aiming at the pump stopping caused by electrical faults and remote/local switching, the standby pump cannot be started after the pump is manually stopped, and the standby pump can also be started when the pump is started for time out, so that the logic control is simple, and the starting sequence of the pump can be modified according to the situation.
Description
Technical Field
The invention relates to the field of ferrous metallurgy automation control, in particular to an optimized control method for blast furnace pump set management based on step 7.
Background
The blast furnace water treatment system mainly has the main functions of providing cooling water for a blast furnace and a hot blast stove, achieving the purpose of cooling and prolonging the service life of equipment, and can be said that the quality of the cooling effect of the blast furnace is an important factor influencing the service life of the blast furnace. A reliable control method of the pump unit is important.
The conventional pump set management logic only considers the condition that a standby pump is started after one pump is failed and stopped, and the standby pump can also be started when one pump is manually stopped, mainly because the running number of the pump sets can be written in a program by the conventional control logic, so that the flexibility of the program is poor. Often, the owner desires that the backup pump not be activated after manual shut-down. In addition, the operation box of the pump is usually arranged on the spot and is connected by hard wiring, if the water pump runs in a remote control state, the change-over switch of the operation box is shifted from a remote gear to a local gear due to misoperation, and the water pump stops running; similarly, if the water pump is operated in the on-site state, the water pump will also stop when the change-over switch is shifted from the on-site gear to the remote gear. Namely, the existing pump group management logic has the following two disadvantages: 1. the pump is stopped manually, and the standby pump is also started; 2. the remote/local switch results in a pump shutdown and no backup pump can be started.
Disclosure of Invention
The invention aims to provide an optimized control method for blast furnace pump set management based on step7 to solve the problems. Therefore, the invention adopts the following specific technical scheme:
an optimized control method for blast furnace pump group management based on step7 can comprise the following steps:
setting a priority starting sequence of each pump;
judging whether the standby pump meets standby conditions and starting conditions, wherein the standby conditions are that the pump does not run, has no fault signal and no starting signal and is in a remote control state, and the starting conditions are that the pump stops running due to fault or on-site remote/local switching or fails to start; and
when the standby condition and the starting condition are satisfied, the standby pumps are started according to the priority starting sequence.
Further, setting the priority starting sequence of each pump is realized by the following modes: the house number of each pump is written in on the picture of the upper computer, and the pump with the small house number is started preferentially.
Further, when the standby condition and the starting condition are satisfied, it is determined which standby pump should be started preferentially by comparing the sizes of the house numbers of the pumps.
By adopting the technical scheme, the invention has the beneficial effects that: aiming at the pump stopping caused by electrical fault and remote/local switching, the standby pump can be started, the standby pump cannot be started after the pump is manually stopped, when the pump is started to be overtime, the standby pump can also be started, the logic control is simple, and the starting sequence of the pump can be modified according to the situation.
Drawings
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
FIG. 1 is a flow chart of an optimized control method for step 7-based blast furnace pump set management according to the present invention;
fig. 2 is a control logic diagram of the pump.
Detailed Description
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present application, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships that are based on the orientation shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present invention.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 and 2, an optimal control method for step 7-based blast furnace pump group management may include the following steps:
100. the priority starting sequence of each pump is set. Specifically, the number of each pump can be written in on the screen of the upper computer, and the size of the number of the pump is compared to determine which spare pump should be started preferentially, for example, the pump with the smaller number of the pump should be started preferentially. In addition, the standby condition of the pump needs to be taken into account, and only the pump meeting this condition is involved in the comparison. The house number of the pump can be changed according to specific conditions, so that the priority starting sequence of the pump is changed. Of course, the sequence of pump activation can also be set directly in the PLC program.
200. It is determined whether the backup pump satisfies a backup condition and a start condition, wherein the backup condition is that the pump is not running (i.e., the running signal is 0) and has no fault signal (i.e., the fault signal is 0) and has no start signal (i.e., the start signal is 0) and is in a remote control state (i.e., the remote signal is 1). The starting condition is that the pump stops running due to fault or site remote/local switching or the pump fails to start. The start-up conditions are signaled as: when the fault signal is 1 and the operation signal is changed from 1 to 0 (fault stop), or the fault signal is 1 and the start signal is changed from 1 to 0 (start failure), or the remote signal is changed from 1 to 0 or from 0 to 1, a delay pulse signal is sent out, and at the moment, if the operation signal is changed from 1 to 0 (field remote/local switching stop).
300. When the standby condition and the starting condition are satisfied, the standby pumps are started according to the priority starting sequence. For example, when both a and B satisfy the standby condition and the start condition, a is started if the house number of a is small, otherwise B is started.
In general, a backup pump can only be started when it is satisfied that one pump stops (due to an electrical fault, a malfunction of an operation box switch) or that one pump fails to start, and that the backup pump satisfies a priority start condition and a backup condition.
The start and stop of the pump can be controlled by a PLC-400, an IO controller collects and sends instructions, and an operation signal, a fault signal and a remote signal of each pump need to be collected. Hardware configuration and programming of the bottom block of the pump is performed on step7, and the bottom block is used for directly controlling the starting and stopping of the motor. The pump group management block is programmed with reference to the control logic shown in fig. 2, and both the bottom layer block of pump start and stop and the block of pump group management are written into OB 1. And downloading the program to a 400CPU, editing an operation picture by using a winc upper computer, starting the pump on the upper computer, and switching to an automatic state.
The invention cancels the set parameters of the running quantity of the pump set under the normal condition, and does not start and stop the standby pump by comparing the actual running quantity of the pump with the set quantity, because if the quantity comparison result is used as the starting condition of the standby pump, one pump can be stopped after the pump is manually started or one pump can be started after the pump is manually stopped. By adopting the optimization method, the standby pump can be started aiming at the pump stopping caused by electrical faults and remote/local switching, the standby pump cannot be started after the pump is manually stopped, and the standby pump can also be started when the pump is started for time out, so that the logic control is simple, and the starting sequence of the pump can be modified according to the situation.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. An optimized control method for blast furnace pump group management based on step7 is characterized by comprising the following steps:
setting a priority starting sequence of each pump;
judging whether the standby pump meets standby conditions and starting conditions, wherein the standby conditions are that the pump does not run, has no fault signal and no starting signal and is in a remote control state, and the starting conditions are that the pump stops running due to fault or on-site remote/local switching or fails to start; and
when the standby condition and the starting condition are satisfied, the standby pumps are started according to the priority starting sequence.
2. The method of claim 1, wherein setting the priority activation sequence for each pump is accomplished by: the house number of each pump is written in on the picture of the upper computer, and the pump with the small house number is started preferentially.
3. A method as claimed in claim 2, wherein when the standby condition and the start condition are satisfied, it is determined which of the standby pumps is to be started preferentially by comparing the sizes of the house numbers of the pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111469740.6A CN114278546A (en) | 2021-12-03 | 2021-12-03 | Optimized control method for blast furnace pump set management based on step7 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111469740.6A CN114278546A (en) | 2021-12-03 | 2021-12-03 | Optimized control method for blast furnace pump set management based on step7 |
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| CN114278546A true CN114278546A (en) | 2022-04-05 |
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| CN202111469740.6A Pending CN114278546A (en) | 2021-12-03 | 2021-12-03 | Optimized control method for blast furnace pump set management based on step7 |
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Citations (9)
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| JP5163830B1 (en) * | 2012-08-09 | 2013-03-13 | 富士電機株式会社 | Pump operation control method and operation control apparatus |
| JP2013053536A (en) * | 2011-09-01 | 2013-03-21 | Kawamoto Densan Kk | Pump control board |
| CN103016323A (en) * | 2011-09-22 | 2013-04-03 | 国网运行有限公司上海超高压管理处 | Redundant start control switching system of water pump |
| CN104895773A (en) * | 2015-05-25 | 2015-09-09 | 山西太钢不锈钢股份有限公司 | Automatic pump start control method for multi-pump set |
| CN205348288U (en) * | 2015-11-20 | 2016-06-29 | 武汉钢铁(集团)公司 | Control system is hauled oneself willingly into fully to water supply pump package |
| CN107299894A (en) * | 2017-08-10 | 2017-10-27 | 中石化宁波工程有限公司 | The many stand-by pump self-starting logic control circuits selected based on priority |
| CN207988014U (en) * | 2018-02-08 | 2018-10-19 | 北方工业大学 | Self-adapted remote automatically controls secondary water supply system |
| JP2020041477A (en) * | 2018-09-11 | 2020-03-19 | 株式会社荏原製作所 | Control unit for pump device and pump device |
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2021
- 2021-12-03 CN CN202111469740.6A patent/CN114278546A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08210259A (en) * | 1995-02-03 | 1996-08-20 | Ebara Corp | Device and method for controlling water feeding device |
| JP2013053536A (en) * | 2011-09-01 | 2013-03-21 | Kawamoto Densan Kk | Pump control board |
| CN103016323A (en) * | 2011-09-22 | 2013-04-03 | 国网运行有限公司上海超高压管理处 | Redundant start control switching system of water pump |
| JP5163830B1 (en) * | 2012-08-09 | 2013-03-13 | 富士電機株式会社 | Pump operation control method and operation control apparatus |
| CN104895773A (en) * | 2015-05-25 | 2015-09-09 | 山西太钢不锈钢股份有限公司 | Automatic pump start control method for multi-pump set |
| CN205348288U (en) * | 2015-11-20 | 2016-06-29 | 武汉钢铁(集团)公司 | Control system is hauled oneself willingly into fully to water supply pump package |
| CN107299894A (en) * | 2017-08-10 | 2017-10-27 | 中石化宁波工程有限公司 | The many stand-by pump self-starting logic control circuits selected based on priority |
| CN207988014U (en) * | 2018-02-08 | 2018-10-19 | 北方工业大学 | Self-adapted remote automatically controls secondary water supply system |
| JP2020041477A (en) * | 2018-09-11 | 2020-03-19 | 株式会社荏原製作所 | Control unit for pump device and pump device |
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