CN114659599A - Weighing device, weighing method and weighing system of temperature-drift-free steel ladle scale - Google Patents
Weighing device, weighing method and weighing system of temperature-drift-free steel ladle scale Download PDFInfo
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- CN114659599A CN114659599A CN202210297658.8A CN202210297658A CN114659599A CN 114659599 A CN114659599 A CN 114659599A CN 202210297658 A CN202210297658 A CN 202210297658A CN 114659599 A CN114659599 A CN 114659599A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 173
- 239000010959 steel Substances 0.000 title claims abstract description 173
- 238000005303 weighing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims description 17
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/04—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/14—Devices for determining tare weight or for cancelling out the tare by zeroising, e.g. mechanically operated
- G01G23/16—Devices for determining tare weight or for cancelling out the tare by zeroising, e.g. mechanically operated electrically or magnetically operated
- G01G23/163—Devices for determining tare weight or for cancelling out the tare by zeroising, e.g. mechanically operated electrically or magnetically operated involving digital counting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/48—Temperature-compensating arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a weighing device, a weighing method and a weighing system of a steel ladle scale without temperature drift, belonging to the field of steel ladle scales, wherein the steel ladle scale measures the real-time weight of a steel ladle on line, a PLC determines the weight of the steel ladle without no load when the temperature drift is absent, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of casting liquid contained in the steel ladle before casting according to the real-time weight of the steel ladle, and the measuring process is divided into three stages: in the no-load stage, the zero point tracking acquires the weight of the no-load steel ladle; in the whole ladle releasing stage, tracking and recording the weight value of the ladle when casting is finished by a weight point; and in the ladle lifting stage, the weight value of the steel ladle after the casting is finished after the steel ladle is lifted away is recorded, the weight of the steel ladle after the casting is finished is finally obtained and is n-m, and the weight of the casting liquid contained in the steel ladle before the casting is a- (n-m), so that the temperature drift-free weighing is realized, and the accuracy of online metering is improved.
Description
Technical Field
The invention relates to the field of steel ladle scales, in particular to a weighing device, a weighing method and a weighing system of a temperature-drift-free steel ladle scale.
Background
The steel ladle scale is an auxiliary device for measuring and weighing molten steel ladles in the production and processing processes of iron works and steel works. When the iron and steel works weigh the high-temperature molten iron and the high-temperature molten steel on line, the steel ladle is placed on a steel ladle scale, and the steel ladle scale measures the weight of the steel ladle or the molten steel. However, when the steel ladle is weighed on line, the high-temperature molten steel in the steel ladle can transfer the temperature to the weighing sensor in the steel ladle scale through the steel ladle, so that the weighing sensor generates temperature drift, and the accuracy of a weighing result is influenced.
Disclosure of Invention
The invention aims to provide a weighing device, a weighing method and a weighing system of a temperature-drift-free steel ladle scale, so as to realize temperature-drift-free weighing and improve the accuracy of on-line metering.
In order to achieve the purpose, the invention provides the following scheme:
a temperature-drift-free ladle scale weighing device, comprising: a ladle scale and a PLC;
the signal output end of the ladle scale is connected with the signal input end of the PLC;
the ladle scale is used for measuring the real-time weight of the ladle on line and transmitting the real-time weight of the ladle to the PLC;
and the PLC is used for determining the weight of the unloaded steel ladle, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of the casting liquid contained in the steel ladle before casting according to the real-time weight of the steel ladle.
Optionally, the apparatus further comprises: an AD module and a wireless module;
the signal output end of the ladle scale is connected with the signal input end of the AD module, and the signal output end of the AD module is connected with the PLC through a wireless module;
the AD module is used for converting a weight analog signal measured by the ladle scale into a weight digital signal and transmitting the weight digital signal to the PLC through the wireless module.
Optionally, the ladle scale includes: a weight sensor and a temperature sensor;
the signal output end of the weight sensor and the signal output end of the temperature sensor are both connected with the signal input end of the PLC;
the weight sensor is used for measuring the real-time weight of the steel ladle on line and transmitting the real-time weight of the steel ladle to the PLC;
the temperature sensor is used for measuring the real-time temperature of the steel ladle on line and transmitting the real-time temperature of the steel ladle to the PLC.
Optionally, the apparatus further comprises: a display screen;
the signal output end of the PLC is connected with a display screen, and the display screen is used for displaying the weight of the unloaded steel ladle, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of the casting liquid contained in the steel ladle before casting when no temperature drift exists.
A method for weighing a steel ladle scale without temperature drift, which comprises the following steps:
continuously monitoring the weight value output after the unloaded steel ladle is placed on a steel ladle scale, and if the weight change value of a unit time interval in a continuous time period is smaller than a first change set value, judging that the steel ladle is in a weight stabilization stage;
carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle;
placing a steel ladle containing casting liquid on a steel ladle scale, and recording a steel ladle weight value a at first time;
tracking the weight of a steel ladle containing casting liquid in the casting process by weight points, and recording the weight value n of the steel ladle when the casting is finished;
recording the weight value m of the steel ladle after the casting is finished and the steel ladle is lifted away;
and determining the weight of the ladle after the completion of casting as n-m and the weight of the casting liquid contained in the ladle before casting as a- (n-m).
Optionally, the zero-point tracking the weight of the unloaded ladle to obtain the weight of the unloaded ladle specifically includes:
judging whether the current weight change value is larger than a second change set value or not to obtain a judgment result;
if the judgment result shows no, the current weight change value is returned to zero;
and if the judgment result shows that the weight value is smaller than the third change set value, taking the weight value measured by the ladle scale as the weight of the unloaded ladle.
Optionally, the weight of the ladle containing the casting liquid in the casting process is tracked by a weight point, and a ladle weight value n when the casting is completed is recorded, and the method specifically includes:
if the weight change rate is greater than or equal to the rate threshold value, not recording the current weight value;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is less than the fourth change set value, the weight change value of the unit time interval is reduced to zero;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is greater than or equal to the fourth change set value, continuously monitoring the weight change value of the steel ladle;
and when the weight change value of each unit time interval in the continuous time period is smaller than the fifth change set value, judging that the casting is finished at the current time point, and recording the current steel ladle weight value n.
A temperature-drift-free ladle scale weighing system, the system comprising:
the stable stage judging module is used for continuously monitoring the weight value output after the unloaded steel ladle is placed on the steel ladle scale, and judging the steel ladle to be in a weight stable stage if the weight change value of a unit time interval in a continuous time period is less than a first change set value;
the zero tracking module is used for carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle;
the recording module is used for placing a steel ladle containing casting liquid on the steel ladle scale and recording the weight value a of the steel ladle at the first time;
the weight point tracking module is used for tracking the weight point of a steel ladle containing casting liquid in the casting process and recording the weight value n of the steel ladle when the casting is finished;
the ladle lifting weight recording module is used for recording the weight value m of the ladle after casting is finished;
and the casting liquid weight determining module is used for determining that the weight of the ladle after the casting is finished is n-m, and the weight of the casting liquid contained in the ladle before the casting is a- (n-m).
Optionally, the zero tracking module specifically includes:
the judging submodule is used for judging whether the current weight change value is larger than a second change set value or not to obtain a judgment result;
the first zeroing submodule is used for zeroing the current weight change value if the judgment result shows that the current weight change value is not zero;
and the empty ladle weight determining submodule is used for taking the weight value measured by the ladle scale as the weight of the empty ladle when the weight change value of each unit time interval in the continuous time period is smaller than a third change set value if the judgment result shows that the weight value is the empty ladle weight.
Optionally, the weight point tracking module specifically includes:
the speed comparison submodule is used for not recording the current weight value if the weight change speed is greater than or equal to a speed threshold;
the second zeroing submodule is used for zeroing the weight change value of the unit time interval if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is smaller than a fourth change set value;
the monitoring submodule is used for continuously monitoring the weight change value of the steel ladle if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is larger than or equal to the fourth change set value;
and the casting completion judging submodule is used for judging that the casting is completed at the current time point and recording the current ladle weight value n when the weight change value of each unit time interval in the continuous time period is smaller than a fifth change set value.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a weighing device, a weighing method and a weighing system of a steel ladle scale without temperature drift, wherein the steel ladle scale measures the real-time weight of a steel ladle on line, a PLC determines the weight of the steel ladle without no load when the temperature drift is absent, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of casting liquid contained in the steel ladle before casting according to the real-time weight of the steel ladle, and the measuring process is divided into three stages: in the no-load stage, the zero point tracking acquires the weight of the no-load steel ladle; in the whole ladle releasing stage, tracking and recording the weight value of the ladle when the casting is finished by using a weight point; and in the ladle lifting stage, the weight value of the steel ladle after the casting is finished after the steel ladle is lifted away is recorded, the weight of the steel ladle after the casting is finished is finally obtained and is n-m, and the weight of the casting liquid contained in the steel ladle before the casting is a- (n-m), so that the temperature drift-free weighing is realized, and the accuracy of online metering is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a weighing device of a temperature-drift-free ladle scale provided by the invention;
fig. 2 is a flow chart of the weighing method of the temperature-drift-free ladle scale provided by the invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a weighing device, a weighing method and a weighing system of a temperature-drift-free steel ladle scale, so as to realize temperature-drift-free weighing and improve the accuracy of on-line metering.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a weighing device of a steel ladle scale without temperature drift, as shown in figure 1, the device comprises: ladle balance and PLC.
And the signal output end of the ladle scale is connected with the signal input end of the PLC. The ladle scale is used for measuring the real-time weight of the ladle on line and transmitting the real-time weight of the ladle to the PLC. The PLC is used for determining the weight of the unloaded steel ladle without temperature drift, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of casting liquid contained in the steel ladle before casting according to the real-time weight of the steel ladle. The casting liquid is molten iron or molten steel.
In one example, the apparatus further comprises: AD module and wireless module. The signal output part of the ladle scale is connected with the signal input part of the AD module, and the signal output part of the AD module is connected with the PLC through the wireless module. The AD module is used for converting the weight analog signal measured by the ladle scale into a weight digital signal and transmitting the weight digital signal to the PLC through the wireless module.
In one example, a ladle scale includes: a weight sensor and a temperature sensor. And the signal output end of the weight sensor and the signal output end of the temperature sensor are connected with the signal input end of the PLC. The weight sensor is used for measuring the real-time weight of the steel ladle on line and transmitting the real-time weight of the steel ladle to the PLC. The temperature sensor is used for measuring the real-time temperature of the steel ladle on line and transmitting the real-time temperature of the steel ladle to the PLC.
In one example, the apparatus further comprises: a display screen. The signal output end of the PLC is connected with a display screen, and the display screen is used for displaying the weight of the unloaded steel ladle, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of the casting liquid contained in the steel ladle before casting when no temperature drift exists. The temperature information and the weight information of the ladle can be known conveniently by workers in real time.
The invention also provides a weighing method of the steel ladle scale without temperature drift, which comprises the following steps as shown in figure 2:
and 101, continuously monitoring the weight value output after the unloaded steel ladle is placed on a steel ladle scale, and judging that the steel ladle is in a weight stabilization stage if the weight change value of a unit time interval in a continuous time period is less than a first change set value.
The empty ladle has a certain temperature at first, so the temperature of the ladle in the natural environment is gradually reduced to be stable finally, and the weight of the empty ladle is changed continuously in the temperature change process. Therefore, whether the weight of the unloaded ladle is stable needs to be judged first, and the temperature drift influence caused by the temperature of a weight sensor in the ladle scale is eliminated. In one example, the weight is continuously monitored for 4-5 seconds, and the weight change per second is less than the set value t, and the weight is considered stable.
And 102, carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle.
In the case of stability, zero tracking: and if the increment of the ladle exceeds the set value and the weight is considered to be stable by continuously monitoring for 4-5s, and if the weight change is less than the set value p in each second, the current weight is changed into the current weight.
In one example, the method specifically comprises the following steps:
judging whether the current weight change value is larger than a second change set value or not, and obtaining a judgment result;
if the judgment result shows that the weight is not the current weight change value, the current weight change value is returned to zero;
and if the judgment result shows that the weight change value of each unit time interval in the continuous time period is smaller than the third change set value, taking the weight value measured by the ladle scale as the weight of the unloaded ladle.
And 103, placing the steel ladle containing the casting liquid on a steel ladle scale, and recording the weight value a of the steel ladle at the first time.
And 104, tracking the weight point of the steel ladle containing the casting liquid in the casting process, and recording the weight value n of the steel ladle when the casting is finished.
The method specifically comprises the following steps:
if the weight change rate is greater than or equal to the rate threshold value, not recording the current weight value;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is less than the fourth change set value, the weight change value of the unit time interval is reduced to zero;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is greater than or equal to the fourth change set value, continuously monitoring the weight change value of the steel ladle;
and when the weight change value of each unit time interval in the continuous time period is smaller than the fifth change set value, judging that the casting is finished at the current time point, and recording the current steel ladle weight value n.
In one example, after the ladle is placed, since molten iron or molten steel in the ladle is poured for casting, the temperature changes rapidly at this time, the weight changes greatly, and weight point tracking is adopted at this time, that is, when the weight change is smaller than a set threshold value within 1s, the weight corresponding to the time is set as a. If the weight change is too fast, not counting when the weight is stable, namely continuously monitoring for 4-5s to judge that the weight is stable, and if the weight change in each second is less than a set value l, judging that the casting is finished at the time point, and recording the current weight n (steel ladle value).
And 105, recording the weight value m of the steel ladle after the casting is finished and the steel ladle is lifted away.
In the ladle lifting stage, after the ladle is lifted away, the current weight is not zero due to the influence of temperature.
And 106, determining the weight of the ladle after the casting is finished to be n-m and the weight of the casting liquid contained in the ladle before the casting to be a- (n-m).
The invention divides the measuring process into three stages: in the no-load stage, the zero point tracking acquires the weight of the no-load steel ladle; in the whole ladle releasing stage, tracking and recording the weight value of the ladle when the casting is finished by using a weight point; and in the ladle lifting stage, the weight value of the steel ladle after the casting is finished after the steel ladle is lifted away is recorded, the weight of the steel ladle after the casting is finished is finally obtained and is n-m, and the weight of the casting liquid contained in the steel ladle before the casting is a- (n-m), so that the temperature drift-free weighing is realized, and the accuracy of online metering is improved.
The invention also provides a weighing system of the steel ladle scale without temperature drift, which comprises the following components:
the stable stage judging module is used for continuously monitoring the weight value output after the unloaded steel ladle is placed on the steel ladle scale, and judging the steel ladle to be in a weight stable stage if the weight change value of a unit time interval in a continuous time period is less than a first change set value;
the zero tracking module is used for carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle;
the recording module is used for placing a steel ladle containing casting liquid on the steel ladle scale and recording the weight value a of the steel ladle at the first time;
the weight point tracking module is used for tracking the weight point of the steel ladle containing the casting liquid in the casting process and recording the weight value n of the steel ladle when the casting is finished;
the steel ladle lifting weight recording module is used for recording the weight value m of the steel ladle after casting is finished;
and the casting liquid weight determining module is used for determining that the weight of the ladle after the casting is finished is n-m, and the weight of the casting liquid contained in the ladle before the casting is a- (n-m).
The zero tracking module specifically comprises:
the judging submodule is used for judging whether the current weight change value is larger than a second change set value or not to obtain a judgment result;
the first zeroing submodule is used for zeroing the current weight change value if the judgment result shows that the current weight change value is not zero;
and the empty ladle weight determining submodule is used for taking the weight value measured by the ladle scale as the weight of the empty ladle when the weight change value of each unit time interval in the continuous time period is smaller than the third change set value if the judgment result shows that the weight value is the empty ladle weight.
The weight point tracking module specifically comprises:
the speed comparison submodule is used for not recording the current weight value if the weight change speed is greater than or equal to the speed threshold;
the second zeroing submodule is used for zeroing the weight change value of the unit time interval if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is smaller than a fourth change set value;
the monitoring submodule is used for continuously monitoring the weight change value of the steel ladle if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is larger than or equal to the fourth change set value;
and the casting completion judging submodule is used for judging that the casting is completed at the current time point and recording the current steel ladle weight value n when the weight change value of each unit time interval in the continuous time period is smaller than the fifth change set value.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the description of the method part.
The principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A temperature-drift-free steel ladle scale weighing device is characterized by comprising: a ladle scale and a PLC;
the signal output end of the ladle scale is connected with the signal input end of the PLC;
the ladle scale is used for measuring the real-time weight of the ladle on line and transmitting the real-time weight of the ladle to the PLC;
and the PLC is used for determining the weight of the unloaded steel ladle without temperature drift, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of casting liquid contained in the steel ladle before casting according to the real-time weight of the steel ladle.
2. The non-temperature-drift ladle scale weighing device according to claim 1, further comprising: an AD module and a wireless module;
the signal output end of the ladle scale is connected with the signal input end of the AD module, and the signal output end of the AD module is connected with the PLC through a wireless module;
the AD module is used for converting the weight analog signal measured by the ladle scale into a weight digital signal and transmitting the weight digital signal to the PLC through the wireless module.
3. The non-temperature-drift ladle scale weighing device according to claim 1 or 2, wherein the ladle scale comprises: a weight sensor and a temperature sensor;
the signal output end of the weight sensor and the signal output end of the temperature sensor are both connected with the signal input end of the PLC;
the weight sensor is used for measuring the real-time weight of the steel ladle on line and transmitting the real-time weight of the steel ladle to the PLC;
the temperature sensor is used for measuring the real-time temperature of the steel ladle on line and transmitting the real-time temperature of the steel ladle to the PLC.
4. The ladle scale weighing device without temperature drift of claim 1 or 2, further comprising: a display screen;
the signal output end of the PLC is connected with a display screen, and the display screen is used for displaying the weight of the unloaded steel ladle, the weight of the steel ladle before casting, the weight of the steel ladle after casting and the weight of the casting liquid contained in the steel ladle before casting when no temperature drift exists.
5. A weighing method of a steel ladle scale without temperature drift is characterized by comprising the following steps:
continuously monitoring the weight value output after the unloaded steel ladle is placed on a steel ladle scale, and if the weight change value of a unit time interval in a continuous time period is smaller than a first change set value, judging that the steel ladle is in a weight stabilization stage;
carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle;
placing a steel ladle containing casting liquid on a steel ladle scale, and recording a steel ladle weight value a at first time;
tracking the weight of a steel ladle containing casting liquid in the casting process by weight points, and recording the weight value n of the steel ladle when the casting is finished;
recording the weight value m of the steel ladle after casting is finished and the steel ladle is lifted away;
and determining the weight of the ladle after the completion of casting as n-m and the weight of the casting liquid contained in the ladle before casting as a- (n-m).
6. The method for weighing the steel ladle scale without temperature drift according to claim 5, wherein the zero point tracking of the weight of the unloaded steel ladle is performed to obtain the weight of the unloaded steel ladle, and the method specifically comprises the following steps:
judging whether the current weight change value is larger than a second change set value or not, and obtaining a judgment result;
if the judgment result shows no, the current weight change value is returned to zero;
and if the judgment result shows that the weight value is smaller than the third change set value, taking the weight value measured by the ladle scale as the weight of the unloaded ladle.
7. The method for weighing the ladle scale without temperature drift according to claim 5, wherein the method for tracking the weight of the ladle containing the casting liquid in the casting process by weight points and recording the weight value n of the ladle after the casting is finished comprises the following steps:
if the weight change rate is greater than or equal to the rate threshold value, not recording the current weight value;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is less than the fourth change set value, the weight change value of the unit time interval is reduced to zero;
if the weight change rate is less than the rate threshold value and the weight change value of the unit time interval is greater than or equal to the fourth change set value, continuously monitoring the weight change value of the steel ladle;
and when the weight change value of each unit time interval in the continuous time period is smaller than the fifth change set value, judging that the casting is finished at the current time point, and recording the current steel ladle weight value n.
8. A temperature-drift-free ladle scale weighing system is characterized by comprising:
the stable stage judging module is used for continuously monitoring the weight value output after the unloaded steel ladle is placed on the steel ladle scale, and judging the steel ladle to be in a weight stable stage if the weight change value of a unit time interval in a continuous time period is less than a first change set value;
the zero tracking module is used for carrying out zero tracking on the weight of the unloaded ladle to obtain the weight of the unloaded ladle;
the recording module is used for placing a steel ladle containing casting liquid on the steel ladle scale and recording the weight value a of the steel ladle at the first time;
the weight point tracking module is used for tracking the weight point of the steel ladle containing the casting liquid in the casting process and recording the weight value n of the steel ladle when the casting is finished;
the steel ladle lifting weight recording module is used for recording the weight value m of the steel ladle after casting is finished;
and the casting liquid weight determining module is used for determining that the weight of the ladle after the casting is finished is n-m, and the weight of the casting liquid contained in the ladle before the casting is a- (n-m).
9. The temperature-drift-free ladle scale weighing system according to claim 8, wherein the zero point tracking module specifically comprises:
the judging submodule is used for judging whether the current weight change value is larger than a second change set value or not to obtain a judgment result;
the first zeroing submodule is used for zeroing the current weight change value if the judgment result shows that the current weight change value is not zero;
and the empty ladle weight determining submodule is used for taking the weight value measured by the ladle scale as the weight of the empty ladle when the weight change value of each unit time interval in the continuous time period is smaller than a third change set value if the judgment result shows that the weight value is the empty ladle weight.
10. The ladle scale weighing system without temperature drift of claim 8, wherein the weight point tracking module specifically comprises:
the speed comparison submodule is used for not recording the current weight value if the weight change speed is greater than or equal to a speed threshold;
the second zeroing submodule is used for zeroing the weight change value of the unit time interval if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is smaller than a fourth change set value;
the monitoring submodule is used for continuously monitoring the weight change value of the steel ladle if the weight change rate is smaller than the rate threshold value and the weight change value of the unit time interval is larger than or equal to the fourth change set value;
and the casting completion judging submodule is used for judging that the casting is completed at the current time point and recording the current steel ladle weight value n when the weight change value of each unit time interval in the continuous time period is smaller than the fifth change set value.
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| GB2211395.5A GB2616928B (en) | 2022-03-24 | 2022-08-04 | Steel Ladle Scale Weighting Device, Weighing Method and System Without Drift |
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| Publication number | Publication date |
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| GB2616928B (en) | 2024-03-20 |
| CN114659599B (en) | 2024-03-26 |
| GB2616928A (en) | 2023-09-27 |
| GB202211395D0 (en) | 2022-09-21 |
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