CN114527260A - Slurry monitoring system - Google Patents
Slurry monitoring system Download PDFInfo
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- CN114527260A CN114527260A CN202210079072.4A CN202210079072A CN114527260A CN 114527260 A CN114527260 A CN 114527260A CN 202210079072 A CN202210079072 A CN 202210079072A CN 114527260 A CN114527260 A CN 114527260A
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- 239000002002 slurry Substances 0.000 title claims abstract description 82
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 47
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Fluid Mechanics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a slurry monitoring system, which comprises: the system comprises a storage tank, a weighing sensor and a controller; the weighing sensor is arranged at the bottom of the storage tank and is connected with the controller; the load cell is configured to: acquiring the weight of the current slurry in the storage tank; the controller is configured to: carrying out differential calculation on the current slurry weight to obtain the current output flow of the delivery pump; carrying out differential calculation on the current output flow to obtain the flow change rate; when the flow rate change rate is equal to zero, taking the difference value between the preset target flow rate and the current flow rate as a flow rate difference value; and adjusting the output frequency of the frequency converter according to the flow difference value and the target flow. According to the embodiment of the invention, the weight of the slurry is obtained through the weighing sensor arranged at the bottom of the storage tank, the flow difference value is obtained through calculation by the controller according to the weight of the slurry, and the output frequency of the frequency converter is adjusted according to the flow difference value and the target flow, so that the power consumption of the frequency converter can be effectively reduced while the output flow is stabilized.
Description
Technical Field
The invention relates to the technical field of monitoring, in particular to a slurry monitoring system.
Background
The concrete is one of the most important modern engineering materials, and is an artificial stone material prepared from a cementing material, granular aggregate, water, an additive and an admixture which are added if necessary according to a certain proportion, uniformly stirred, cured and hardened. Because of its advantages of high compressive strength, good durability, wide strength grade range, etc., it is widely used in civil engineering, shipbuilding, mechanical industry, ocean development and geothermal engineering. In the concrete production process, the monitoring of slurry is an essential process. However, the output frequency of the frequency converter cannot be adjusted by the existing slurry monitoring system, so that the power consumption of the output pump is reduced while the stability of the output flow of the slurry is ensured by the existing slurry monitoring system.
Disclosure of Invention
The invention provides a slurry monitoring system, which aims to solve the technical problem that the conventional slurry monitoring system is difficult to reduce the power consumption of an output pump while ensuring the stability of the output flow of slurry.
One embodiment of the present invention provides a slurry monitoring system, comprising:
the system comprises a storage tank, a weighing sensor and a controller;
the weighing sensor is arranged at the bottom of the storage tank and is connected with the controller;
the load cell is configured to:
acquiring the current slurry weight in the storage tank;
the controller is configured to:
carrying out differential calculation on the current slurry weight to obtain the current output flow of the delivery pump;
carrying out differential calculation on the current output flow to obtain a flow change rate;
when the flow rate change rate is equal to zero, taking the difference value between the preset target flow and the current flow as a flow difference value;
and adjusting the output frequency of the frequency converter according to the flow difference value and the target flow.
Further, the differentiating the weight of the slurry and calculating to obtain the output flow of the delivery pump includes:
and dividing the difference value of the current slurry weight and the historical slurry weight by the time difference of the current slurry weight and the historical slurry weight to calculate the current output flow of the output pump.
Further, the differentiating the current output flow to obtain the flow rate of change includes:
and dividing the difference value between the current flow and the historical flow by the time difference between the current flow and the historical flow to calculate the flow change rate.
Further, the adjusting the output frequency of the frequency converter according to the flow difference and the target flow includes:
if the flow difference value is larger than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to increase a preset value;
and if the flow difference value is smaller than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to reduce a preset value.
Further, the controller is further configured to:
and judging whether the output pump is seriously abraded or not according to the output frequency and the current flow.
Further, according to the output frequency and the current flow, judging whether the output pump is seriously abraded or not, including:
and when the output frequency is adjusted to the upper limit value, judging whether the current flow is smaller than a preset threshold value, if so, judging that the output pump is seriously abraded, and generating early warning information.
Further, the controller is further configured to:
and calculating to obtain the density of the slurry according to the weight of the current slurry, the inner radius of the storage tank and the height of the liquid level of the storage tank.
Further, the monitoring system still includes the laser level indicator, the laser level indicator sets up the top of storage jar.
According to the embodiment of the invention, the weight of the slurry is obtained through the weighing sensor arranged at the bottom of the storage tank, the current output flow of the delivery pump is obtained through differential calculation of the current slurry weight through the controller, the flow change rate is obtained through differential calculation of the current output flow, when the flow change rate is equal to zero, the difference value between the preset target flow and the current flow is used as the flow difference value, the output frequency of the frequency converter is adjusted according to the flow difference value and the target flow, and the power consumption of the frequency converter can be effectively reduced while the output flow is stabilized by adjusting the output power of the frequency converter.
Furthermore, the laser material level meter is arranged at the top of the storage tank, and the height information in the storage tank, including the height information of the storage tank and the slurry height information in the storage tank, can be quickly and conveniently acquired through the laser material level meter, so that the high material level monitoring and the low material level monitoring in the storage tank can be quickly and accurately realized, and an alarm can be timely sent out when the slurry height is lower than a preset lower limit value or higher than a preset upper limit value. The embodiment of the invention also judges whether the output pump is seriously worn or not according to the output frequency and the current flow, thereby being capable of monitoring the wear condition of the output pump in time and giving a warning when the wear is serious, not only effectively prolonging the service life of the equipment, but also ensuring the working efficiency of the equipment.
Drawings
FIG. 1 is a schematic diagram of a slurry monitoring system according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of a slurry monitoring system according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "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.
Referring to fig. 1, an embodiment of the present invention provides a slurry monitoring system, including:
a storage tank 10, a load cell 20, and a controller 30;
the load cell 20 is arranged at the bottom of the storage tank 10, and the load cell 20 is connected with the controller 30;
the load cell 20 is configured to:
acquiring the current slurry weight in the storage tank 10;
in one embodiment, the load cell 20 is disposed at the bottom of the slurry storage tank 10, and the current slurry weight in the storage tank 10 is obtained in real time through the load cell 20 and sent to the controller 30 for processing, and the controller 30 is used for collecting, recording and storing relevant data.
The controller 30 is configured to:
carrying out differential calculation on the current slurry weight to obtain the current output flow of the delivery pump;
a transfer pump is provided between the storage tank 10 and the slurry tank, and during the slurry storage process, the slurry in the slurry tank is transferred to the storage tank 10 by the transfer pump, and the output flow rate of the transfer pump determines the slurry storage speed. According to the embodiment of the invention, the current output flow of the delivery pump can be accurately calculated according to the current slurry weight.
Carrying out differential calculation on the current output flow to obtain the flow change rate;
when the flow rate change rate is equal to zero, taking the difference value between the preset target flow rate and the current flow rate as a flow rate difference value;
in the embodiment of the present invention, when the flow rate tends to be equal to zero, it indicates that the current flow rate is in a stable state, and the difference between the target flow rate and the current flow rate is used as the flow rate difference, i.e., the current flow rate can be adjusted according to the flow rate difference. It will be appreciated that the target flow rate may be set and adjusted as desired, and in particular, may be set and adjusted according to the volume of the storage tank 10, the height of the storage tank 10, and the size of the slurry outlet of the storage tank 10.
And adjusting the output frequency of the frequency converter according to the flow difference value and the target flow.
According to the embodiment of the invention, by adjusting the output frequency of the frequency converter, the power consumption of the frequency converter can be effectively reduced while the output flow is stable.
In one embodiment, differentiating the weight of the slurry and calculating the output flow rate of the transfer pump comprises:
and dividing the difference value of the current slurry weight and the historical slurry weight by the time difference of the current slurry weight and the historical slurry weight to calculate the current output flow of the output pump.
For example, the current output flow is calculated by the formula:
N＝(G-G′)/Δt
wherein, N is the current flow, G is the current slurry weight, G' is the historical slurry weight, and Δ t is the time difference between the current slurry weight and the historical slurry weight.
In one embodiment, differentiating the current output flow rate to obtain the flow rate change comprises:
and dividing the difference value between the current flow and the historical flow by the time difference between the current flow and the historical flow to calculate the flow change rate.
Illustratively, the formula for calculating the rate of change of flow is:
P＝(N-N′)/Δt
wherein, P is the flow rate of change, N is the current flow, N' is the historical flow, and Δ t is the time difference, i.e. the time difference between the current flow and the historical flow.
In one embodiment, adjusting the output frequency of the frequency converter according to the flow difference value and the target flow comprises:
if the flow difference value is larger than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to increase a preset value;
in the embodiment of the present invention, when Δ N > mxa%, the output frequency is increased by 0.1Hz, where Δ N is a flow difference, M is a target flow, and a is a percentage of a control target flow range, it can be understood that the percentage of the control target flow range and a preset value may be set as needed, for example, the percentage may be 30% to 60%, and the preset value may be 0.1Hz to 0.2 Hz.
And if the flow difference value is smaller than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to reduce the preset value.
In the embodiment of the present invention, when Δ N is less than mxa%, the output frequency is reduced by 0.1Hz, where Δ N is a flow difference, M is a target flow, and a is a percentage of a control target flow range, it can be understood that the percentage of the control target flow range and a preset value may be set as required, for example, the percentage may be 30% to 60%, and the preset value may be 0.1Hz to 0.2 Hz.
In one embodiment, the controller 30 is further configured to:
and judging whether the output pump is seriously abraded or not according to the output frequency and the current flow.
Optionally, judging whether the output pump is seriously worn or not according to the output frequency and the current flow rate, including:
and when the output frequency is adjusted to the upper limit value, judging whether the current flow is smaller than a preset threshold value, if so, judging that the output pump is seriously worn, and generating early warning information.
In the embodiment of the present invention, the output frequency cannot be further adjusted after being adjusted to a certain value, that is, it is determined that the output frequency has been adjusted to the upper limit value, and when the current flow rate is smaller than the preset value, for example, if the current flow rate is smaller than 1t/min, it is determined that the wear of the output pump is serious, the controller 30 generates a wear warning message of the output pump, and sends the wear warning message to a relevant person for warning.
Optionally, the embodiment of the present invention may further determine the wear condition of the output pump by adjusting the current flow, specifically, adjust the current flow to the target flow, and if the output frequency of the output pump is greater than the preset frequency value, determine that the wear of the output pump is serious.
In one embodiment, the controller 30 is further configured to:
and calculating to obtain the slurry density according to the current slurry weight, the inner radius of the storage tank 10 and the liquid level height of the storage tank 10.
Illustratively, the calculation formula for the slurry density is:
ρ＝G/((L0-L)πr^2)
where ρ is the slurry density, G is the current slurry weight in the storage tank 10, and L0Is the distance from the laser level indicator to the bottom of the tank, L is the distance from the laser level indicator to the liquid level in the tank, pi is the circumferential ratio, and r is the inner radius of the storage tank 10. According to the embodiment of the invention, the slurry density can be accurately calculated according to the current slurry weight and the information of the storage tank 10, so that the adjustment of the pulping process can be guided according to the slurry density, and the slurry density meets the requirement.
In the embodiment of the invention, the laser level indicator is arranged at the top of the storage tank 10, the arrangement position of the laser level indicator avoids the position of the stirring blade, and the height information of the storage tank 10, such as the height, the liquid level height and the like, can be accurately obtained through the laser level indicator.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the weight of slurry is obtained through the weighing sensor 20 arranged at the bottom of the storage tank 10, the current output flow of the delivery pump is obtained through differential calculation of the current slurry weight through the controller 30, the flow change rate is obtained through differential calculation of the current output flow, when the flow change rate is equal to zero, the difference value between the preset target flow and the current flow is used as the flow difference value, the output frequency of the frequency converter is adjusted according to the flow difference value and the target flow, and the power consumption of the frequency converter can be effectively reduced while the output flow is stabilized by adjusting the output power of the frequency converter.
Further, in the embodiment of the invention, the laser material level meter is arranged at the top of the storage tank 10, and the height information in the storage tank 10, including the height information of the storage tank 10 and the slurry height information in the storage tank 10, can be quickly and conveniently acquired through the laser material level meter, so that the monitoring of the high material level and the monitoring of the low material level in the storage tank 10 can be quickly and accurately realized, and an alarm can be timely sent out when the slurry height is lower than a preset lower limit value or higher than a preset upper limit value. The embodiment of the invention also judges whether the output pump is seriously worn or not according to the output frequency and the current flow, thereby being capable of monitoring the wear condition of the output pump in time and giving a warning when the wear is serious, not only effectively prolonging the service life of the equipment, but also ensuring the working efficiency of the equipment.
The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.
Claims (8)
1. A slurry monitoring system, comprising:
the system comprises a storage tank, a weighing sensor and a controller;
the weighing sensor is arranged at the bottom of the storage tank and is connected with the controller;
the load cell is configured to:
acquiring the current weight of slurry in the storage tank;
the controller is configured to:
carrying out differential calculation on the current slurry weight to obtain the current output flow of the delivery pump;
carrying out differential calculation on the current output flow to obtain a flow change rate;
when the flow rate change rate is equal to zero, taking the difference value between the preset target flow rate and the current flow rate as a flow rate difference value;
and adjusting the output frequency of the frequency converter according to the flow difference value and the target flow.
2. The slurry monitoring system of claim 1, wherein said differentiating the weight of said slurry to calculate the output flow rate of the transfer pump comprises:
and dividing the difference value of the current slurry weight and the historical slurry weight by the time difference of the current slurry weight and the historical slurry weight to calculate the current output flow of the output pump.
3. The slurry monitoring system of claim 1, wherein said differentiating said current output flow rate to obtain a flow rate change comprises:
and dividing the difference value between the current flow and the historical flow by the time difference between the current flow and the historical flow to calculate the flow change rate.
4. The slurry monitoring system of claim 1, wherein said adjusting an output frequency of a frequency converter based on said flow rate difference and said target flow rate comprises:
if the flow difference value is larger than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to increase a preset value;
and if the flow difference value is smaller than the product of the target flow and the percentage of the control target flow range, controlling the output frequency to reduce a preset value.
5. The slurry monitoring system of claim 1, wherein the controller is further configured to:
and judging whether the output pump is seriously abraded or not according to the output frequency and the current flow.
6. The slurry monitoring system of claim 5, wherein determining whether the output pump is heavily worn based on the output frequency and the current flow rate comprises:
and when the output frequency is adjusted to the upper limit value, judging whether the current flow is smaller than a preset threshold value, if so, judging that the output pump is seriously abraded, and generating early warning information.
7. The slurry monitoring system of claim 1, wherein the controller is further configured to:
and calculating to obtain the density of the slurry according to the weight of the current slurry, the inner radius of the storage tank and the height of the liquid level of the storage tank.
8. The slurry monitoring system of claim 1, further comprising a laser level gauge disposed at the top of the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079072.4A CN114527260A (en) | 2022-01-24 | 2022-01-24 | Slurry monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210079072.4A CN114527260A (en) | 2022-01-24 | 2022-01-24 | Slurry monitoring system |
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| CN114527260A true CN114527260A (en) | 2022-05-24 |
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| CN202210079072.4A Pending CN114527260A (en) | 2022-01-24 | 2022-01-24 | Slurry monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115824320A (en) * | 2023-02-13 | 2023-03-21 | 中国铁路济南局集团有限公司 | Flow calculation method and measuring and calculating device based on frequency conversion of frequency converter |
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| CN103154676A (en) * | 2010-09-08 | 2013-06-12 | 丰田自动车株式会社 | Flow quantity detecting device |
| CN108319214A (en) * | 2018-02-08 | 2018-07-24 | 无锡东谷工程科技有限公司 | A kind of control method of Weightlessness balance, apparatus and system |
| CN112651384A (en) * | 2021-01-15 | 2021-04-13 | 芜湖美的厨卫电器制造有限公司 | Method, device, storage medium and processor for zero-cold-water gas water heater |
| CN112859586A (en) * | 2021-01-12 | 2021-05-28 | 东北大学 | Diaphragm pump system safe operation guaranteeing method based on fuzzy PID control |
| CN113813873A (en) * | 2021-09-18 | 2021-12-21 | 东莞信易电热机械有限公司 | Dosing device, control method, dosing system and storage medium |
-
2022
- 2022-01-24 CN CN202210079072.4A patent/CN114527260A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154676A (en) * | 2010-09-08 | 2013-06-12 | 丰田自动车株式会社 | Flow quantity detecting device |
| CN108319214A (en) * | 2018-02-08 | 2018-07-24 | 无锡东谷工程科技有限公司 | A kind of control method of Weightlessness balance, apparatus and system |
| CN112859586A (en) * | 2021-01-12 | 2021-05-28 | 东北大学 | Diaphragm pump system safe operation guaranteeing method based on fuzzy PID control |
| CN112651384A (en) * | 2021-01-15 | 2021-04-13 | 芜湖美的厨卫电器制造有限公司 | Method, device, storage medium and processor for zero-cold-water gas water heater |
| CN113813873A (en) * | 2021-09-18 | 2021-12-21 | 东莞信易电热机械有限公司 | Dosing device, control method, dosing system and storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115824320A (en) * | 2023-02-13 | 2023-03-21 | 中国铁路济南局集团有限公司 | Flow calculation method and measuring and calculating device based on frequency conversion of frequency converter |
| CN115824320B (en) * | 2023-02-13 | 2023-05-23 | 中国铁路济南局集团有限公司 | Flow calculation method and device based on frequency conversion of frequency converter |
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