WO2023246013A1

WO2023246013A1 - Method and device for determining pumpability of material, and pumping control method and device

Info

Publication number: WO2023246013A1
Application number: PCT/CN2022/139062
Authority: WO
Inventors: 谭明; 黄建兵; 聂一彪; 尹君; 王泽龙
Original assignee: 中联重科股份有限公司
Priority date: 2022-06-20
Filing date: 2022-12-14
Publication date: 2023-12-28
Also published as: CN115013277A; CN115013277B

Abstract

A method and device for determining the pumpability of a material, and a pumping control method and device. The method for determining the pumpability of a material comprises: collecting pumping pressure data in a pumping treatment window period during material pumping; determining, according to the collected pumping pressure data, a pumpability judgment parameter corresponding to the pumping treatment window period; and determining the pumpability of the material according to the pumpability judgment parameter corresponding to the pumping treatment window period and a preset pumpability judgment parameter threshold of the pumping treatment window period. Therefore, the pumpability of the material is automatically determined.

Description

Methods and devices for determining the pumpability of materials and pumping control methods and devices

Cross-references to related applications

This application claims the rights and interests of Chinese patent application 202210701325.7 submitted on June 20, 2022. The content of this application is incorporated into this article by reference.

Technical field

The present invention relates to the field of engineering machinery, and specifically to a method and device for determining the pumpability of materials and a pumping control method and device.

Background technique

Concrete pumpability is understood as "the ability of concrete to pass through a pipeline under the action of pumping pressure." Under a certain pressure, the farther or higher the concrete can be transported, the lower the probability of pipe blockage. Pipe blockage during the pumping process will cause construction companies to lose concrete, scrap pipelines, delay construction, delay work, and other major economic losses. At present, most of the pumpability testing methods in the industry are to collect concrete samples and judge based on various experiments such as slump experiments, expansion and slump cylinder retention time, and rely on experience to judge whether it can be done. For smooth pumping. During the on-site concrete pumping process, the operator operates the pump truck from a distance. When the concrete cannot be pumped, the operator can only judge the situation through the failure of the end hose to discharge material or through his own experience, such as listening to the sound of the engine. The concrete is not pumpable.

Contents of the invention

The object of the present invention is to provide a method and device for determining the pumpability of materials and a pumping control method and device, which can solve or at least partially solve the above problems.

In order to achieve the above object, one aspect of an embodiment of the present invention provides a method for determining the pumpability of a material. The method includes: collecting pumping pressure data within a pumping processing window period when pumping the material, wherein , the pumping processing window period includes at least one pumping and pushing process, and the pumping equipment for pumping the material is currently in the pumping process; according to the collected pumping pressure data, it is determined that the pumping processing window period corresponds to The pumpability judgment parameter; and determining the pumpability of the material according to the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period.

Optionally, the pumping processing window period includes multiple pumping and pushing processes, and the pumpability judgment parameter corresponding to the pumping processing window period is a pumping pressure trend parameter, wherein the pump The pumping pressure trend parameter reflects the trend of pumping pressure changes within the pumping processing window period.

Optionally, determining the pumpability of the material according to the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period includes: during the pumping When the pumpability judgment parameter corresponding to the processing window period is less than or equal to the pumpability judgment parameter threshold of the preset pumping processing window period, it is determined that the pumpability of the material is not bad; and/or in the When the pumpability judgment parameter corresponding to the pumping processing window period is greater than the pumpability judgment parameter threshold of the preset pumping processing window period, it is determined that the pumpability of the material is poor.

Optionally, the pumping processing window period includes multiple pumping and pushing processes, and the method further includes: counting the number of materials in a single pumping and pushing process within the pumping processing window period and determining the material The number of pumping and pushing processes corresponding to poor pumpability; and based on the counted number and the preset number threshold, the materials that are judged to be not poor in pumpability are classified as having good pumpability Or the pumpability is average.

Optionally, distinguishing the materials that are judged to have good pumpability or good pumpability based on the counted number and the preset number threshold generally includes: when the counted number is less than or If it is equal to the preset number threshold, it is determined that the material is pumpable; and/or if the counted number is greater than the preset number threshold, it is determined that the material is pumpable. Average sex.

Optionally, counting the number of pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period includes: Any of the pumping and pushing processes within the pumping processing window period: determining the pumpability judgment parameters corresponding to the pumping and pushing process; and based on the pumpability judgment corresponding to the pumping and pushing process Parameters and preset pumpability judgment parameter thresholds in the pumping and pushing process to determine whether the pumpability of the material in the pumping and pushing process is poor; and if the pumpability of the material is judged to be poor The number of the pumping and pushing processes is counted to obtain the number.

Optionally, the pumpability judgment parameter corresponding to the pumping and pushing process is a pumping pressure stability parameter, wherein the pumping pressure stability parameter corresponding to the pumping and pushing process reflects the The discrete degree of pumping pressure during the pumping and pushing process.

Optionally, the pumping pressure stability parameter is a fluctuation coefficient. For a pumping and pushing process, the fluctuation coefficient is the pressure standard deviation of the pumping and pushing process and the pump pressure of the pumping and pushing process. Send the ratio of the average pressure.

Optionally, the pumping pressure trend parameter is a linear slope. Determining the linear slope according to the collected pumping pressure data includes: determining a pump for each pumping and pushing process within the pumping processing window period. The average value of the pumping pressure is determined; and based on the determined average value of the pumping pressure, a straight line fitting method is used to determine the slope of the straight line.

Optionally, the method further includes: determining a pumpability judgment parameter corresponding to the pumping process, wherein the pumping device is currently in the pumping process; and based on the pumpability judgment parameter corresponding to the pumping process and the preset pumpability judgment parameter threshold value during the pumping process to determine the pumpability of the material.

Optionally, the pumpability judgment parameter corresponding to the pumping process is a pumping pressure judgment parameter.

Optionally, determining the pumping pressure evaluation parameters includes: determining the pumping pressure average value and pressure curve characteristics within the pumping processing window period before the pump stopping stage and the pump stopping time corresponding to the pump stopping stage, wherein, The pump stop stage is a stage in which the pumping equipment does not pump the material before the pump start process; and the pump start pressure is determined based on the determined average pumping pressure, pressure curve characteristics and pump stop time. Judgment parameters.

Optionally, determining the pumpability of the material based on the pumpability judgment parameter corresponding to the pumping process and the preset pumpability judgment parameter threshold of the pumping process includes: determining the pumpability of the material corresponding to the pumping process. When the judgment parameter is less than or equal to the preset pumpability judgment parameter threshold in the pumping process, it is judged that the pumpability of the material is not bad; and/or the pumpability judgment parameter corresponding to the pumping process is greater than When the pumpability judgment parameter threshold is preset during the pumping process, the material is judged to have poor pumpability.

Optionally, the method also includes: based on the pumping pressure average value within the pumping processing window period before the pump shutdown stage and the pumping pressure average threshold value within the preset pumping processing window period, the pump will be determined as having poor pumpability. The materials with poor pumpability are classified into good pumpability or average pumpability, wherein the pump stopping stage is a stage when the pumping equipment does not pump the material before the pumping process.

Optionally, the materials that are judged to have good pumpability are distinguished based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure threshold within the preset pumping processing window period. Good pumpability or pumpability generally includes: the average pumping pressure within the pumping processing window period before the pump shutdown stage is less than or equal to the threshold of the average pumping pressure within the preset pumping processing window period. below, it is determined that the material has good pumpability; and/or the average pumping pressure within the pumping processing window period before the pump shutdown stage is greater than the average pumping pressure threshold within the preset pumping processing window period. In this case, the pumpability of the material is judged to be average.

In addition, another aspect of the embodiment of the present invention provides a pumping control method. The pumping control method includes: determining the pumpability of the material according to the above-mentioned method for determining the pumpability of the material; and When the pumping equipment of the material is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is adopted to control the pumping equipment, wherein , the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment, reducing the displacement current of the main pump of the pumping equipment, and increasing the constant pressure pump of the pumping equipment. displacement current; and/or when the pumping equipment is currently in the pumping process and the pumpability of the material is judged to be poor or average, use at least one of the pumping process improvement measures to improve the pumping process. The pumping equipment is controlled, wherein the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment and reducing the displacement current of the main pump of the pumping equipment.

Optionally, when the pumpability of the material is determined to be poor and improvement measures fail to improve the pumpability of the material, the pumping control method further includes: taking early warning measures.

Accordingly, another aspect of the embodiment of the present invention provides a device for determining the pumpability of a material. The device includes: a collection module for collecting the pumping within the pumping processing window when pumping the material. Pressure data, wherein the pumping processing window period includes at least one pumping and pushing process, and the pumping equipment for pumping the material is currently in the pumping process; the pumpability judgment parameter determination module of the pumping process is used to determine the parameters according to The collected pumping pressure data is used to determine the pumpability judgment parameters corresponding to the pumping processing window period; and a pumpability determination module during the pumping process is used to determine the pumpability judgment parameters corresponding to the pumping processing window period. The pumpability judgment parameter and the preset pumping processing window period pumpability judgment parameter threshold are used to determine the pumpability of the material.

Optionally, the pumping process pumpability determination module determines the pumpability judgment parameter of the material according to the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period. Pumpability includes: determining the pumpability of the material when the pumpability judgment parameter corresponding to the pumping processing window period is less than or equal to the pumpability judgment parameter threshold value of the preset pumping processing window period. The pumpability is not bad; and/or when the pumpability judgment parameter corresponding to the pumping processing window period is greater than the pumpability judgment parameter threshold value of the preset pumping processing window period, the material is judged to be Poor pumpability.

Optionally, the pumping processing window period includes multiple pumping and pushing processes, and the device further includes: a counting module for counting a single pumping and pushing process within the pumping processing window period. The number of the pumping and pushing processes corresponding to the poor pumpability of the material is determined in the material process; the pumpability determination module of the pumping process is also used to: based on the counted number and the preset number threshold , the materials judged to have good pumpability are classified into good pumpability or average pumpability.

Optionally, the pumpability determination module during the pumping process differentiates the materials that are judged to have good pumpability into good pumpability or average pumpability based on the counted number and the preset number threshold. This includes: determining that the material has good pumpability when the counted number is less than or equal to the preset number threshold; and/or determining that the material has good pumpability when the counted number is greater than the preset number threshold. In this case, the pumpability of the material is judged to be average.

Optionally, the number counting module counts the number of the pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period, including: : For any of the pumping and pushing processes within the pumping processing window period: determining the pumpability judgment parameters corresponding to the pumping and pushing process; and according to the corresponding pumping and pushing processes. The pumpability judgment parameter and the preset pumpability judgment parameter threshold of the pumping and pushing process are used to determine whether the pumpability of the material is poor during the pumping and pushing process; and the pumpability of the material is determined. The number of pumping and pushing processes that are judged to be poor is counted to obtain the number.

Optionally, the device further includes: a pumpability judgment parameter determination module for the pumping process, used to determine the pumpability judgment parameters corresponding to the pumping process, wherein the pumping equipment is currently in the pumping process; and The pumpability determination module of the pumping process is used to determine the pumpability of the material based on the pumpability judgment parameters corresponding to the pumping process and the preset pumpability judgment parameter threshold of the pumping process.

Optionally, the pumpability judgment parameter determination module in the pumping process determines the pumping pressure evaluation parameters including: determining the pumping pressure average value and pressure curve characteristics within the pumping processing window period before the pump shutdown stage and the pressure curve characteristics. The pump stop time corresponding to the pump stop stage, where the pump stop stage is the stage when the pumping equipment does not pump the material before the pump starting process; and based on the determined pumping pressure average value and pressure curve characteristics and pump stop time to determine the pump starting pressure evaluation parameters.

Optionally, the pumpability determination module of the pumping process determines the pumpability of the material based on the pumpability judgment parameter corresponding to the pumping process and the preset pumpability judgment parameter threshold of the pumping process, including: When the pumpability judgment parameter corresponding to the pumping process is less than or equal to the preset pumpability judgment parameter threshold of the pumping process, it is determined that the pumpability of the material is not poor; and/or in the case of the pumping process When the pumpability judgment parameter corresponding to the pumping process is greater than the preset pumpability judgment parameter threshold value of the pumping process, it is determined that the pumpability of the material is poor.

Optionally, the pumpability determination module during the pumping process is also configured to: based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the threshold value of the pumping pressure average value within the preset pumping processing window period. , the materials that are judged to have good pumpability are classified into good pumpability or average pumpability, wherein the pump stop stage is when the pumping equipment does not pump the pump before the pumping process. The stage of the material.

Optionally, the pumpability determination module during the pumping process will be determined as based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure threshold within the preset pumping processing window period. The classification of materials with good pumpability into good pumpability or pumpability generally includes: the average pumping pressure within the pumping processing window period before the pump shutdown stage is less than or equal to the preset pumping processing window If the average pumping pressure threshold within the period is reached, it is determined that the material has good pumpability; and/or the average pumping pressure within the pumping processing window period before the pumping stop stage is greater than the preset pumping processing If the average pumping pressure threshold within the window period is reached, the pumpability of the material is judged to be average.

Correspondingly, another aspect of the embodiment of the present invention also provides a pumping control device, which includes: the above-mentioned device for determining the pumpability of materials; and a control module for: during pumping When the pumping equipment of the material is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is adopted to control the pumping equipment, Wherein, the set of measures to improve the pumping process includes: increasing the rotation speed of the main pump of the pumping equipment, reducing the displacement current of the main pump of the pumping equipment, and increasing the constant pressure of the pumping equipment. The displacement current of the pump; and/or when the pumping equipment is currently in the pumping process and the pumpability of the material is judged to be poor or average, use at least one of the pumping process improvement measures to The pumping equipment is controlled, wherein the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment and reducing the displacement current of the main pump of the pumping equipment.

Optionally, the pumping control device further includes: an early warning module, configured to take early warning measures when the pumpability of the material is determined to be poor and the improvement measures fail to improve the pumpability of the material. .

In addition, another aspect of the embodiment of the present invention also provides a construction machine, which includes the above-mentioned device for determining the pumpability of materials or the above-mentioned pumping control device.

In addition, another aspect of the embodiment of the present invention also provides a machine-readable storage medium, the machine-readable storage medium stores instructions, the instructions are used to cause the machine to execute the above-mentioned method for determining the pumpability of a material. or the pumping control method described above.

Through the above technical solution, the pumping pressure data is collected to determine the pumpability judgment parameters corresponding to the pumping processing window period and the pumpability judgment parameters corresponding to the pumping processing window period and the pumpability judgment parameters corresponding to the preset pumping processing window period. The threshold value determines the pumpability of the material. In this way, the pumpability of the material is automatically determined. In addition, compared with manually determining the pumpability of materials based on experience, automatically determining the pumpability of materials does not require manual participation and is more accurate, making it more practical. In addition, simply collecting pumping pressure data can determine the pumpability of materials, which is simple to operate and highly practical.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of the drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the following specific embodiments, but do not constitute a limitation of the present invention. In the attached picture:

Figure 1 is a flow chart of a method for determining the pumpability of materials provided by an embodiment of the present invention;

Figure 2 is a logical schematic diagram of a method for determining the pumpability of materials provided by another embodiment of the present invention;

Figure 3 is a logical schematic diagram of a method for determining the pumpability of materials provided by another embodiment of the present invention;

Figure 4 is a logical schematic diagram of an automatic control strategy provided by another embodiment of the present invention;

Figure 5 is a logical schematic diagram of an automatic control strategy provided by another embodiment of the present invention;

Figure 6 is a logical schematic diagram of an automatic control strategy provided by another embodiment of the present invention;

Figure 7 is a structural block diagram of an early warning system provided by another embodiment of the present invention; and

Figure 8 is a structural block diagram of a device for determining the pumpability of materials provided by another embodiment of the present invention.

Explanation of reference signs

1 Mixer truck early warning unit 2 Concrete transportation equipment communication unit

3 Pumping equipment detection unit 4 Pumping equipment control calculation unit

5 Pumping equipment communication unit 6 Concrete station communication unit

7 Concrete station early warning unit 8 Pumping equipment early warning unit

9. Acquisition module. 10. Pumpability judgment parameter determination module in the pumping process.

11Pumpability determination module for pumping process

Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

One aspect of embodiments of the present invention provides a method for determining the pumpability of a material.

Figure 1 is a flow chart of a method for determining the pumpability of materials provided by an embodiment of the present invention. As shown in Figure 1, the method includes the following contents.

In step S10, the pumping pressure data within the pumping processing window period is collected when pumping materials, where the pumping processing window period refers to the interval containing a preset number of pumping and pushing processes used for calculation processing. The delivery processing window period includes at least one pumping and pushing process, and the pumping equipment for pumping materials is currently in the pumping process. In addition, it should be noted that during the pumping process, at least one pumping and pushing process included in the pumping processing window period is the pumping and pushing process before the current pumping and pushing process and the last one in the pumping processing window period. The pump push process is adjacent to the current pump push process in the pump process. For example, the pumping processing window includes three pumping and pushing processes. If the current pumping and pushing process is the 6th pumping and pushing process, the pumping and pushing processes included in the pumping processing window period are the 3rd to 5th pumping and pushing processes; within the pumping processing window period The last pumping and pushing process is the fifth pumping and pushing process, which is adjacent to the current pumping and pushing process. If the current pumping and pushing process is the 7th pumping and pushing process, the pumping and pushing processes included in the pumping processing window period are the 4th to 6th pumping and pushing processes; within the pumping processing window period The last pumping and pushing process is the 6th pumping and pushing process, which is adjacent to the current pumping and pushing process. Optionally, a pressure sensor can be used to capture the pumping pressure data. In addition, the material can be any material that can be pumped by the pumping equipment. For example, the material can be a viscous material that can be pumped. Alternatively, the material can be concrete. It should be noted that the pumping and pushing process here refers to the process in which a single pumping cylinder piston pushes material from the starting point to the end point when the pumping equipment is working; the pumping processing window period includes at least one pumping and pushing process, which refers to The piston of the pumping cylinder completes at least one pushing process from the starting point to the end point. Similarly, the piston of the pumping cylinder completes at least one pushing process. Similarly, the piston of the pumping cylinder completes multiple pushing processes. The starting point and end point of the pumping and pushing process can be obtained through the power signal of the electromagnetic reversing valve that controls the action of the pumping cylinder. The starting point and end point of the pumping and pushing process can also be obtained through the displacement sensor signal used to detect the displacement of the pumping cylinder piston; the proximity switch can also be set at the starting point and end point of the piston movement to obtain the in-position signal of the proximity switch.

In step S11, the pumpability judgment parameters corresponding to the pumping processing window period are determined based on the collected pumping pressure data. Among them, the pumpability judgment parameter corresponding to the pumping processing window period can be any parameter based on which the pumpability of the material can be judged. For example, when the pumping processing window period includes multiple pumping and pushing processes, the pumpability judgment parameters corresponding to the pumping processing window period can be parameters that reflect the changing trend of the pumping pressure within the pumping processing window period; when pumping When the processing window period only includes one pumping and pushing process, the pumpability judgment parameter corresponding to the pumping processing window period can be a parameter that reflects the discrete degree of the pumping pressure within the pumping processing window period. Optionally, the parameter that reflects the changing trend of the pumping pressure can be the slope of the straight line obtained by fitting the pumping pressure data; the parameter that reflects the discrete degree of the pumping pressure can be the fluctuation coefficient, and the fluctuation coefficient corresponding to the pumping processing window period It may be the ratio of the standard deviation of the pressure within the pumping process window period to the average pumping pressure within the pumping process window period.

In step S12, the pumpability of the material is determined based on the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period. Specifically, the pumpability judgment parameter corresponding to the pumping processing window period can be compared with the preset pumpability judgment parameter threshold value of the pumping processing window period, and the pumpability judgment parameter corresponding to the pumping processing window period is compared with the preset pumpability judgment parameter threshold. Set the size relationship between the pumpability judgment parameter thresholds during the pumping processing window period to determine the pumpability of the material. In addition, the preset pumpability judgment parameter threshold during the window period of the pumping and pushing process can be set based on experience.

Optionally, in the embodiment of the present invention, the pumping processing window period includes multiple pumping and pushing processes, and the pumpability judgment parameter corresponding to the pumping processing window period may be a pumping pressure trend parameter, where the pumping pressure The trend parameter reflects the trend of pumping pressure changes within the pumping processing window period. For example, the pumping pressure trend parameter can be the slope of a straight line, or it can be a parameter calculated by the exponential smoothing method, etc. The pumping pressure trend parameter can be any parameter that can reflect the changing trend of the pumping pressure. Optionally, when the pumping pressure trend parameter is a straight line slope, all methods that can calculate the straight line slope based on the collected pumping pressure data can be applied to the embodiment of the present invention. Specifically, the slope of the straight line can be calculated as follows. For example, no matter how many pumping and pushing processes are included in the pumping processing window period, a straight line can be fitted to all the collected pumping pressure data to obtain the straight line slope. Alternatively, the collected pumping pressure data can be differentiated based on the pumping and pushing process, and a straight line can be fitted to the differentiated pumping pressure data to obtain a straight line slope. Specifically, distinguishing the collected pumping pressure data based on the pumping and pushing process can be to calculate the pumping pressure average value within a pumping and pushing process, and use the pumps in each pumping and pushing process to calculate the average pumping pressure. The slope of the straight line is obtained by straight-line fitting based on the average value of the sending pressure. Or to distinguish the collected pumping pressure data based on the pumping and pushing process, you can select the maximum value of the pumping pressure or the intermediate value of the pumping pressure in any pumping and pushing process, and use each pumping and pushing process to distinguish the collected pumping pressure data. Perform straight line fitting based on the maximum value of the pumping pressure or the intermediate value of the pumping pressure to obtain the straight line slope.

Optionally, in the embodiment of the present invention, determining the pumpability of the material based on the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold of the pumping processing window period includes: during the pumping processing When the pumpability judgment parameter corresponding to the window period is less than or equal to the preset pumpability judgment parameter threshold during the pumping processing window period, it is determined that the pumpability of the material is not bad; and/or the pumpability judgment parameter corresponding to the pumping processing window period is not bad; When the pumpability judgment parameter is greater than the preset pumpability judgment parameter threshold during the pumping processing window period, the material is judged to have poor pumpability. Among them, the pumpability of the material refers to the ability of the material to pass through the pipeline of the pumping equipment under the action of pumping pressure. Poor pumpability refers to poor fluidity of the material. The discharge at the end of the pipeline of the pumping equipment is intermittent and very little material can flow out; good pumpability means the opposite situation to poor pumpability. .

Optionally, in the embodiment of the present invention, further distinction can be made if the pumpability is not bad. Specifically, the pumping processing window period includes multiple pumping and pushing processes, and the method also includes: counting the pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period. The number of materials; and based on the counted number and the preset number threshold, materials that are judged to have good pumpability are classified into good pumpability or average pumpability. That is, in a single pumping and pushing process, the pumpability of the material is judged, and the number of pumping and pushing processes in which the pumpability of the material is judged to be poor is counted. According to the counted number and The preset number threshold further differentiates materials with good pumpability into good pumpability or average pumpability. Specifically, the counted number is compared with the preset number threshold, and materials with poor pumpability are further distinguished based on the size relationship between the two. In addition, the preset number threshold is related to the number of pumping and pushing processes included in the pumping processing window period, and can be set according to the number of pumping and pushing processes included in the pumping processing window period, for example, preset The number threshold may be the value obtained by multiplying the number of pumping and pushing processes included in the pumping processing window period by 40% or 50%. In addition, the pumpability of the material generally refers to the normal flow of the material in the pipeline, the flow in half the pipe or the flow in 1/3 of the inner diameter of the pipe, and the continuous discharge of material at the end of the pipe; the good pumpability of the material refers to the flow of the material in the pipeline. Smooth, full pipe flow, continuous discharge at the end of the pipe.

Optionally, in the embodiment of the present invention, distinguishing the materials that are judged to have good pumpability according to the counted number and the preset number threshold as having good pumpability or good pumpability may generally include: When the counted number is less than or equal to the preset number threshold, the pumpability of the material is judged to be good; and/or when the counted number is greater than the preset number threshold, the pumpability of the material is judged to be average. .

Optionally, in the embodiment of the present invention, counting the number of pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period may include the following content. For any pumping and pushing process within the pumping processing window period, determine whether the pumpability of the material in this pumping and pushing process is poor. Specifically, the pumpability of the material can be determined during a pumping and pushing process according to the following content. Determine the pumpability judgment parameters corresponding to the pumping and pushing process. Among them, the pumpability judgment parameter corresponding to the pumping and pushing process can be a parameter that reflects the changing trend of the pumping pressure during the pumping and pushing process, or it can also be a parameter that reflects the discrete degree of the pumping pressure during the pumping and pushing process. . Among them, the parameter that reflects the changing trend of the pumping pressure can be the slope of the straight line obtained by fitting the pumping pressure data; the parameter that reflects the discrete degree of the pumping pressure can be the fluctuation coefficient, and the fluctuation coefficient corresponding to the pumping and pushing process can be The ratio of the standard deviation of the pressure during the pumping and pushing process to the average value of the pumping pressure during the pumping and pushing process. According to the pumpability judgment parameter corresponding to the pumping and pushing process and the preset pumpability judgment parameter threshold of the pumping and pushing process, it is determined whether the pumpability of the material in the pumping and pushing process is poor. Among them, the preset pumpability judgment parameter threshold in the pumping and pushing process can be set based on experience. Count the number of pumping and pushing processes in which the pumpability of the material is judged to be poor to obtain the number.

Optionally, in the embodiment of the present invention, the pumpability judgment parameter corresponding to the pumping and pushing process is the pumping pressure stability parameter, wherein the pumping pressure stability parameter corresponding to a pumping and pushing process reflects the stability of the pump. The discrete degree of pumping pressure during the feeding process. Taking the material as concrete as an example, we will explain why the pumping pressure stability parameter is used to determine the pumpability of the material. Through the analysis of concrete pumping data, it was found that the pressure curves of the pumping hydraulic system of easy-to-pump concrete and difficult-to-pump concrete are specifically reflected in the inconsistent degree of data fluctuations in the pressure stable period of the pumping process. In the pumping and pushing stage, the more stable the pumping pressure data is, the better the concrete material condition is, which is easier to pump and less prone to pipe blockage; in the pumping and pushing stage, the greater the fluctuation in the pumping pressure data is, the worse the concrete material condition is, and the concrete is difficult to When pumping, the probability of pipe blockage is high. The stability of data can be measured by any quantity that can characterize the degree of dispersion, such as standard deviation, variance, etc. Specifically, within a single pumping and pushing process, the degree of discreteness of the pumping pressure can be reflected by the fluctuation coefficient of the pumping pressure. The larger the fluctuation coefficient, the greater the fluctuation and the greater the degree of dispersion; the smaller the fluctuation coefficient, the greater the degree of dispersion. The smaller the fluctuation, the smaller the dispersion. In a single pumping and pushing process, the fluctuation coefficient C _v = the standard deviation SD of the pumping pressure in a single pumping and pushing process/the average pumping pressure Mean in a single pumping and pushing process.

Optionally, in the embodiment of the present invention, the pumping pressure stability parameter is a fluctuation coefficient. For a pumping and pushing process, the fluctuation coefficient is the pressure standard deviation of the pumping and pushing process and the pressure of the pumping and pushing process. Ratio of average pumping pressure.

Optionally, in the embodiment of the present invention, the pumping pressure trend parameter may be a straight line slope, and determining the straight line slope based on the collected pumping pressure data may include the following content. Determine the average pumping pressure of each pumping and pushing process within the pumping processing window period; based on the determined average pumping pressure, use the straight line fitting method to determine the slope of the straight line. For example, the least squares method can be used to determine the slope of a straight line. Specifically, the slope of the straight line can be calculated according to the following formula.

Among them, b represents the slope of the straight line, n represents the number of pumping and pushing processes included in the pumping processing window period, i represents the sequence number of the pumping and pushing process within the pumping processing window period, and _xi represents the i-th pumping process. The moment when the pushing process ends, _yi represents the average pumping pressure of the i-th pumping and pushing process,

Represents the average value of the end time of n pumping and pushing processes,

Represents the average value of the average pumping pressure of n pumping and pushing processes. For example, the pumping processing window period includes 10 pumping and pushing processes, and the previous 10 pumping and pushing processes before the current pumping and pushing process may constitute a processing window. Calculate the average pumping pressure of each pumping and pushing process within the 10 pumping and pushing processes, and use the least squares method to determine the straight line slope b.

Figure 2 is a logical schematic diagram of a method for determining the pumpability of materials provided by another embodiment of the present invention. In this embodiment, the pumping equipment is currently in the process of pumping, and the material is concrete; during the process of concrete pumping, the pumpability of concrete is comprehensively determined through the characteristics of the pressure curve (fluctuation coefficient) and the pressure change trend. . In addition, the pumping processing window period includes 10 pumping and pushing processes. The current pumping and pushing process and the previous 10 pumping and pushing processes form a processing window. The fluctuation coefficient of a single pumping and pushing process is calculated in real time, and Count the number of pumping and pushing processes in which the concrete pumpability is judged to be poor during the pumping processing window period.

As shown in Figure 2, in this embodiment, the method includes the following contents. Collect pumping pressure data for each pumping and pushing process during the pumping processing window. Calculate the fluctuation coefficient of the pumping pressure during each pumping process during the pumping processing window period. Specifically, within a single pumping and pushing process, the fluctuation coefficient C _v = the standard deviation SD of the pumping pressure in a single pumping and pushing process/the average value of the pumping pressure in a single pumping and pushing process Mean. For any pumping and pushing process, the pumpability of the concrete in the pumping and pushing process is judged according to the fluctuation coefficient and the threshold corresponding to the fluctuation coefficient. Among them, when the fluctuation coefficient is greater than the threshold value corresponding to the fluctuation coefficient, the pumpability of the concrete is poor; when the fluctuation coefficient is less than or equal to the threshold value corresponding to the fluctuation coefficient, the pumpability of the concrete is not bad. Count the number w of pumping and pushing processes in which concrete pumpability is judged to be poor. Determine the slope b of the straight line corresponding to the pumping processing window period. Determine whether the number w is greater than the preset number threshold w ₀ . When the number w is less than or equal to the preset number threshold w ₀ , the concrete is judged to be pumpable. When the number w is greater than the preset number threshold w ₀ , determine whether the straight line slope b is greater than the threshold b ₀ corresponding to the straight line slope. When the straight line slope b is greater than the threshold b ₀ corresponding to the straight line slope, the pumpability of the concrete is judged to be poor; when the straight line slope b is less than or equal to the threshold b ₀ corresponding to the straight line slope, the pumpability of the concrete is judged to be average.

Optionally, in the embodiment of the present invention, when the pumping equipment is currently in the pumping process, the method for determining the pumpability of the material may also include the following content. Determine the pumpability judgment parameters corresponding to the pumping process. Among them, the pumpability judgment parameter corresponding to the pumping process can be any parameter that can judge the pumpability of the material during the pumping process. For example, the pumpability judgment parameter corresponding to the pumping process may be a pumping pressure evaluation parameter based on which the magnitude of the pumping pressure in the pumping process can be judged. Based on the pumping pressure evaluation parameter, whether an excessive amount occurs in the pumping process can be judged. Pressure to judge. The pumpability of the material is determined based on the pumpability judgment parameters corresponding to the pumping process and the preset pumpability judgment parameter threshold during the pumping process. Among them, when the pumpability judgment parameter corresponding to the pumping process is less than or equal to the preset pumpability judgment parameter threshold of the pumping process, it is determined that the pumpability of the material is not bad; and/or the pumpability corresponding to the pumping process is When the pumpability judgment parameter is greater than the preset pumpability judgment parameter threshold during pumping, the material is judged to have poor pumpability.

Optionally, in the embodiment of the present invention, the pump pressure evaluation parameters may be determined according to the following content. Determine the average pumping pressure and pressure curve characteristics within the pumping processing window period before the pump stop stage and the pump stop time corresponding to the pump stop stage. The pump stop stage is the stage when the pumping equipment does not pump materials before the pump start process. . Additionally, the pumping process window may include at least one pumping push process. It should be noted that during the pump starting process, the pumping processing window period before the pump stopping stage refers to the pumping processing window period adjacent to the pump stopping stage and before the pump stopping stage, that is, the pumping processing window. The pumping and pushing processes included in the period are the pumping and pushing processes before the pumping stop stage and the last pumping and pushing process is adjacent to the pumping and stopping stage. Furthermore, the pressure curve characteristic may be a parameter related to the fluctuation coefficient or a pumping pressure standard deviation or a pumping pressure variance or the like. Among them, when the pumping processing window period includes one pumping and pushing process, the pressure curve characteristic is the fluctuation coefficient; when the pumping processing window period includes multiple pumping and pushing processes, the pressure curve characteristic is a single pump The average value of the fluctuation coefficient corresponding to the pushing process. In addition, within a single pumping and pushing process, the fluctuation coefficient is the ratio of the standard deviation of the pumping pressure within a single pumping and pushing process to the average value of the pumping pressure within the single pumping and pushing process. When the pumping processing window period includes multiple pumping and pushing processes, the fluctuation coefficient corresponding to each pumping and pushing process is first determined, and then the average value of all the determined fluctuation coefficients is calculated to determine the single pumping process. The average value of the fluctuation coefficient corresponding to the pushing process. In addition, the pump stop time corresponding to the pump stop stage can be determined by determining the time during which the engine speed is in the idle state. Based on the determined average pumping pressure, pressure curve characteristics and pump stop time, the pump starting pressure evaluation parameters are determined. Optionally, in the embodiment of the present invention, the starting pump pressure evaluation parameter can be determined based on the pumping pressure average value, pressure curve characteristics, and the mapping relationship between the pump stop time and the pump starting pressure evaluation parameter. The mapping relationship can mainly establish the stop pump pressure evaluation parameter. The functional relationship between the average pumping pressure before the pump, pressure curve characteristics, pump stop time, and pump starting pressure evaluation parameters. For example, the mapping relationship can be h (P, C _Z , T) = θ ₁ P + θ ₂ C _Z + θ ₃ T, h is the pump pressure evaluation parameter, and P is the pumping processing window period before the pump shutdown stage. The average pumping pressure, C _Z is the pressure curve characteristics during the pumping processing window period before the pump stop stage, T is the pump stop time corresponding to the pump stop stage, θ ₁ , θ ₂ , θ ₃ are the coefficients of each variable respectively. Among them, θ ₁ , θ ₂ , θ ₃ can calculate the loss function through the least square method, such as the mean square error function L (θ ₁ , θ ₂ , θ ₃ ); then use an optimization algorithm (such as the gradient descent method) to solve the loss The optimal solution of function L (θ ₁ , θ ₂ , θ ₃ ), thereby obtaining θ ₁ , θ ₂ , θ ₃ . In addition, the loss function can also be different loss functions such as average absolute error function, average deviation error function, cross entropy loss function, multi-class SVN loss function, etc.; the optimization algorithm can also be gradient descent method, Newton method, quasi-Newton method, Conjugate gradient method, etc. In addition, the mapping relationship can also be h(P, C _Z , T) = θ ₁ T + θ ₂ P ² + θ ₃ (C _Z ) ³ . In addition, mapping relationships can be established based on neural network models. For example, based on historical data, the pump overpressure area that has occurred is determined from a large amount of material pumping working condition data; based on the pumping pressure average and pressure curve characteristics during the pumping processing window before the pump shutdown stage, the pump shutdown Obtain the data set for the pump stop time and pump pressure evaluation parameters corresponding to the stages; divide the data set into a training set and a test set; train and test the neural network model through the training set and test set respectively, and determine the mapping relationship h(P , C _Z , T).

Optionally, in the embodiment of the present invention, materials that are judged to have good pumpability can be further differentiated into good pumpability or average pumpability. Specifically, the method for determining the pumpability of materials also includes the following content. According to the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure threshold value within the preset pumping processing window period, materials that are judged to have good pumpability are classified as having good pumpability. Or the pumpability is average, and the pump stop stage is the stage when the pumping equipment does not pump materials before the pumping process. Optionally, materials judged to be not poor in pumpability can be distinguished according to the following content. When the average pumping pressure within the pumping processing window period before the pump shutdown stage is less than or equal to the threshold value of the average pumping pressure within the preset pumping processing window period, the pumpability of the material is determined to be good; and/or When the average pumping pressure within the pumping processing window period before the pump shutdown stage is greater than the threshold of the average pumping pressure within the preset pumping processing window period, the pumpability of the material is determined to be average.

Figure 3 is a logical schematic diagram of a method for determining the pumpability of materials provided by another embodiment of the present invention. In this embodiment, the pumping equipment is currently in the process of pumping, the material is concrete, and the pumping processing window period includes 10 pumping and pushing processes. If the concrete pumping pressure is high before the pump is stopped or the concrete material condition is poor, and if the pump is stopped for too long without reverse pumping, jogging, etc., overpressure and pipe blockage may occur next time the pump is started. In this embodiment, the average pressure before the pump is stopped and the pump stop time are obtained, and the phenomenon of overpressure when the pump is started is predicted through the mapping relationship, thereby evaluating the pumpability of the concrete.

As shown in Figure 3, the method includes the following contents. Determine the average pumping pressure and pressure curve characteristics within the pumping processing window period before the pump shutdown stage and the corresponding pump shutdown time during the pump shutdown stage. Determine whether the average pumping pressure within the pumping processing window period before the pump shutdown stage is greater than the preset average pumping pressure threshold within the pumping processing window period. If the average pumping pressure is not greater than the threshold of the average pumping pressure within the preset pumping processing window period, the concrete is judged to be pumpable. If the average pumping pressure is greater than the threshold of the average pumping pressure within the preset pumping processing window period, determine the starting pump pressure evaluation parameter according to the mapping relationship, and continue to determine whether the starting pump pressure evaluation parameter h (P, C _Z , T) It is greater than the preset pump starting pressure evaluation parameter threshold θ ₀ to determine whether overpressure occurs during the current pump starting process. Among them, h(P, C _Z , T) > θ ₀ is judged to be overpressure, and h (P, C _Z , T) ≤ _{θ 0} is judged to be no overpressure. If overpressure occurs, the pumpability of the concrete is judged to be poor; if overpressure does not occur, the pumpability of the concrete is average. In addition, θ ₀ is the judgment threshold, which can be determined by the distribution of actual test situations.

In addition, another aspect of embodiments of the present invention provides a pumping control method. The pumping control method includes: determining the pumpability of the material according to the method for determining the pumpability of the material described in the above embodiment; and when the pumping equipment for pumping the material is in the pumping process and the pumpability of the material When the performance is judged to be poor or average, use at least one of the pumping process improvement measures to control the pumping equipment. The pumping process improvement measures include: increasing the rotation speed of the main pump of the pumping equipment, Reduce the displacement current of the main pump of the pumping equipment and increase the displacement current of the constant pressure pump of the pumping equipment; and/or when the pumping equipment is in the pumping process and the pumpability of the material is judged to be poor or average. In the case of , use at least one of the set of pumping process improvement measures to control the pumping equipment, where the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment and reducing the main pump speed of the pumping equipment. Pump displacement current. When the pumpability of the material is poor or average, automatic control strategies can also be used to improve the pumpability of the material. Among them, increase the speed of the main pump of the pumping equipment. For pumping equipment that uses the engine as power to drive the main pump, you can increase the engine speed and increase the chassis engine power to ensure sufficient power; reduce the main pump speed. The pump displacement current can reduce the pumping speed; increasing the constant pressure pump displacement current can increase the swing speed and force of the swing cylinder. In addition, when the pumpability of the material is poor or normal, increase the speed of the main pump of the pumping equipment and/or reduce the displacement current of the main pump and/or increase the displacement current of the constant pressure pump. The degree may vary, specifically the degree corresponding to poor pumpability may be greater than the degree corresponding to general pumpability. In addition, the main pump is used to drive the main cylinder to move back and forth to provide oil to the pumping cylinder; the constant pressure pump is used to drive the swing cylinder to move back and forth to provide oil to the distribution system.

Taking the material as concrete and the pumping equipment as a pump truck as an example, the following is an exemplary introduction to the automatic control strategy based on Figures 4 and 5. In this embodiment, the pump truck is in the process of pumping. As shown in Figure 4, for concrete with poor or average pumpability, the control unit improves the pumpability of concrete based on the constant pressure pump displacement current, main pump displacement current and chassis engine speed. Specifically, the pumpability of concrete is improved by increasing the displacement current of the constant pressure pump, reducing the displacement current of the main pump, and increasing the engine speed. As shown in Figure 5, when the concrete pumpability is good, the engine speed, the displacement current of the main pump and the displacement current of the constant pressure pump do not change. Specifically, the engine speed is controlled to the speed corresponding to the current speed gear, the displacement current of the main pump is controlled to the displacement current corresponding to the current gear, and the displacement current of the constant pressure pump is controlled to the factory default setting of the constant pressure pump. displacement current. When the concrete pumpability is average, adjust the engine speed to the sum of the speed corresponding to the current speed gear and the increment Δ1, where Δ1 can be set based on experience. Specifically, Δ1 can be 100rpm-200rpm; The displacement current of the main pump is adjusted as the product of the displacement current corresponding to the current gear of the displacement current and the current coefficient α, where α is the speed corresponding to the current speed gear of the engine/(the speed and increment corresponding to the current speed gear (sum of Δ1); adjust the displacement current of the constant pressure pump to the sum of the displacement current of the constant pressure pump factory default setting and the increment Δ2. Among them, the increment Δ2 can be determined according to specific circumstances. For example, the increment Δ2 can be determined based on the change in the average value of the pumping pressure during the pumping and pushing process. Specifically, in the case where the pumping processing window period includes multiple pumping and pushing processes, Δ2 changes according to the change of the average pumping pressure of the pumping and pushing processes, for example, according to the last pump in the pumping processing window period. The increment is determined by the increase in the average value of the pumping pressure during the feeding and pushing process compared to the average value of the remaining pumping pressure data within the pumping processing window period except for the pumping pressure data in the last pumping and pushing process. Δ2. For example, the average pumping pressure of the last pumping pass in the pumping processing window is compared to the remaining pumping pressure data in the pumping processing window excluding the pumping pressure data of the last pumping pass. The increase in the average value is 3MPa, the constant pressure pump pressure increases by 3MPa, and the constant pressure pump pressure change is linearly converted into an increment Δ2. When the concrete pumpability is poor, adjust the engine speed to the maximum engine speed; adjust the displacement current of the main pump to the product of the displacement current corresponding to the current gear of the displacement current and the current coefficient α, where, α is the speed corresponding to the current speed gear of the engine/the maximum speed of the engine; adjust the displacement current of the constant pressure pump to the sum of the displacement current set by the factory default setting of the constant pressure pump and the increment Δ2. Among them, the setting of increment Δ2 can be set with reference to the above content.

Taking the material as concrete and the pumping equipment as a pump truck as an example, the automatic control strategy is introduced as an example based on Figure 6. In this embodiment, the pump truck is in the process of starting the pump. As shown in Figure 6, when the concrete pumpability is good, the control strategy remains unchanged, that is, the engine speed and the displacement current of the main pump do not change. When the pumpability of concrete is not good, determine whether to reverse the pump or jog the master cylinder during the pump shutdown period before the current pumping process. If the concrete pumping pressure is high before the pump is stopped or the concrete material condition is poor, and if the pump is stopped for too long without reverse pumping, jogging, etc., overpressure and pipe blockage may occur next time the pump is started. That is, when the pumpability of the concrete is not good, it is judged whether an overpressure phenomenon occurs during the current pumping process, or whether the pumpability of the concrete is poor. Specifically, you can refer to the method described in the above embodiment. Determine whether overpressure occurs during the current pumping process or whether the pumpability of concrete is poor. When reverse pumping or jogging of the master cylinder is performed during the pump shutdown period, there will be no overpressure during the current pumping process, and the pumpability of the concrete is judged to be average, then the engine speed will be adjusted to the speed corresponding to the current speed gear. The sum of increments Δ1, where Δ1 can be set based on experience, specifically, Δ1 can be 100rpm-200rpm; adjust the displacement current of the main pump to the displacement current corresponding to the current gear of the displacement current and the current coefficient α Product, where α is the speed corresponding to the current engine speed gear/(the sum of the speed corresponding to the current speed gear and the increment Δ1). When the reverse pump or inching of the main cylinder is not performed during the pump shutdown period, overpressure will occur during the current pumping process, and the pumpability of the concrete is judged to be poor. The engine speed is adjusted to the maximum speed of the pump truck, and the main pump is The displacement current is adjusted to the displacement current corresponding to the minimum displacement current gear.

Optionally, in the embodiment of the present invention, when the pumpability of the material is determined to be poor and the improvement measures fail to improve the pumpability of the material, the pumping control method further includes: taking early warning measures. For materials with poor pumpability, automatic control strategies are adopted to improve the pumpability of the materials. If the pumpability performance of the material cannot be improved through automatic control strategies, early warning measures will be taken to remind personnel related to the material and require manual intervention. Specifically, the early warning reminds the machine operator to perform different operations to reduce the probability of pipe blockage; the early warning reminds the discharging personnel that the materials in the mixer truck may segregate, stop discharging and accelerate the mixing drum to mix the materials; remind the material production personnel to The ratio is improved.

Figure 7 is a structural block diagram of an early warning system provided by another embodiment of the present invention. Wherein, in this embodiment, the material is concrete. As shown in Figure 7, the early warning system includes a pumping equipment detection unit 3, a pumping equipment control calculation unit 4, a communication unit and an early warning unit. Among them, the communication unit includes a pumping equipment communication unit 5, a concrete transportation equipment communication unit 2, and a concrete station communication unit 6; the early warning unit is an early warning device, including a pumping equipment early warning unit 8, a mixer truck early warning unit 1, and a concrete station early warning unit 7. ; Pumping equipment detection unit 3 can detect oil pump/engine speed, pumping pressure and other equipment status; Pumping equipment control calculation unit 4 is an industrial computer or its control device with strong computing power and input and output, which can collect the data of each pump Send the pumping pressure data during the pushing process, and calculate the characteristics of the pumping pressure curve in each pumping and pushing process (such as calculating the fluctuation coefficient described in the embodiment of the present invention) or the pumping pressure trend parameters (such as the slope of the straight line) ) and so on; the communication unit is responsible for communication between the early warning unit and the pumping equipment control calculation unit 4. The communication unit can be a GPS module and its monitoring server, a wireless communication module, a wired communication module, etc. The early warning unit 8 of the pumping equipment can be reminders such as lights on the remote control, changing text on the remote controller, vibrations of the remote controller, or voices issued by the remote control; the early warning unit 1 of the mixer truck can be reminders such as lights and voices at the hopper of the pump truck, or Lighting, voice and other reminders at the mixer truck discharge place; the concrete station early warning unit 7 can schedule indoor lighting, voice and other reminders.

The early warning system can remind operators to take different preventive measures for different operations to reduce the probability of pipe blockage, thereby providing effective early warning for pipe blockage and pipe explosion. For example, if the early warning unit 8 of the pump truck equipment is used to alert the operator to perform different pumping operations to reduce the probability of pipe blockage; if the mixer truck early warning unit 1 is used to alert the discharger, the material in the mixer truck may segregate, stop discharging and Accelerate the mixing drum to mix the concrete; for example, the early warning unit 7 of the concrete station can alert the concrete production personnel to improve the proportion of concrete.

In view of the shortcomings of existing concrete pumpability detection methods and pump pipe plugging early warning systems, embodiments of the present invention provide a concrete pumpability determination method and early warning system, which belong to the field of concrete work performance detection and mainly include pump pumping. The pumpability of concrete is judged during the process and pumping process. The technical solution provided by the embodiment of the present invention mainly includes a quantitative pumpability index during the concrete pumping process and a method for determining the pumpability of concrete. Specifically, the working parameters of the concrete pumping system are obtained, and the pumpability evaluation index is calculated through the work of the pumping system; based on the pumpability judgment during the pumping process, the working parameters of the pumping system, pumping stop time, pumpability evaluation index and concrete are established. The mapping relationship between pumpability is used to evaluate the pumpability of concrete through the mapping relationship; for the pumpability judgment during the pumping process, combined with the pumpability evaluation index, the individual pumping and pushing process in the pumping processing window period is judged in real time. The pumpability of concrete is evaluated based on the number of times when the pumpability of concrete is judged to be poor and the slope of the straight line corresponding to the pumping processing window period. Based on the relationship between the number of times and the threshold value of the times and the relationship between the slope of the straight line and the threshold corresponding to the slope of the straight line. In addition, in the embodiment of the present invention, for concrete with poor or average pumpability evaluated during the pumping process and the pumping process, different automatic control strategies can be used to improve the pumpability of concrete. For concrete with poor pumpability, if the pumpability of the concrete cannot be improved through automatic control strategies, early warning will remind the concrete personnel and require manual intervention. For example, early warning will remind the operator to perform different operations to reduce the probability of pipe blockage; early warning Remind the discharging personnel that the material in the mixer truck may segregate, stop discharging and accelerate the mixing drum to mix the concrete; the early warning reminds the concrete production personnel to improve the proportion of concrete.

At present, most of the pumpability testing methods in the industry are to collect concrete samples and judge based on various experiments such as slump experiments, expansion and slump cylinder retention time, and rely on experience to judge whether it can be done. For smooth pumping. The technical solution provided by the embodiment of the present invention aims at the shortcomings of the existing concrete pumpability detection methods and provides a concrete pumpability determination method and early warning system, which does not require manual on-site collection of concrete samples, and the detection process is highly real-time; combined with For the pumpability of concrete, an automatic control strategy is adopted to carry out anti-clogging pumping control; combined with the pumpability of concrete, appropriate early warnings are provided to concrete stakeholders through the early warning system to remind the concrete's pumpability from the concrete production, transportation and delivery links. Improve pump performance and reduce the occurrence of pipe blockage, which can more effectively reduce the pipe blockage rate during pumping.

Accordingly, another aspect of embodiments of the present invention provides an apparatus for determining the pumpability of a material.

Figure 8 is a device for determining the pumpability of materials provided by another embodiment of the present invention. As shown in Figure 8, the device includes an acquisition module 9, a pumping process pumpability judgment parameter determination module 10 and a pumping process pumpability determination module 11. Among them, the acquisition module 9 is used to collect the pumping pressure data within the pumping processing window period when pumping materials, wherein the pumping processing window period includes at least one pumping and pushing process, and the pumping equipment for pumping materials is currently in the pumping state. pumping process; the pumping process pumpability judgment parameter determination module 10 is used to determine the pumpability judgment parameters corresponding to the pumping processing window period based on the collected pumping pressure data; the pumping process pumpability determination module 11 is used to determine The pumpability of the material is determined based on the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period.

Optionally, in the embodiment of the present invention, the pumping processing window period includes multiple pumping and pushing processes, and the pumpability judgment parameter corresponding to the pumping processing window period is the pumping pressure trend parameter, where, the pumping pressure trend The parameters reflect the trend of pumping pressure changes within the pumping processing window period.

Optionally, in the embodiment of the present invention, the pumpability determination module of the pumping process determines the material according to the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold of the pumping processing window period. The pumpability includes: determining that the pumpability of the material is not bad when the pumpability judgment parameter corresponding to the pumping processing window period is less than or equal to the preset pumpability judgment parameter threshold value during the pumping processing window period; and/ Or when the pumpability judgment parameter corresponding to the pumping processing window period is greater than the preset pumpability judgment parameter threshold value during the pumping processing window period, the pumpability of the material is determined to be poor.

Optionally, in the embodiment of the present invention, the pumping processing window period includes multiple pumping and pushing processes, and the device further includes: a counting module for counting a single pumping and pushing process within the pumping processing window period. The number of pumping and pushing processes corresponding to the poor pumpability of the material is determined within the process; the pumpability determination module of the pumping process is also used: based on the counted number and the preset number threshold, it will be determined to be pumpable Materials with good pumpability are classified into good pumpability or average pumpability.

Optionally, in the embodiment of the present invention, the pumpability determination module of the pumping process distinguishes the materials that are judged to have good pumpability or have good pumpability based on the counted number and the preset number threshold. Pumpability generally includes: when the counted number is less than or equal to the preset number threshold, determining that the material has good pumpability; and/or when the counted number is greater than the preset number threshold, It is judged that the pumpability of the material is average.

Optionally, in the embodiment of the present invention, the number counting module counts the number of pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period, including: for pumping Any pumping and pushing process within the delivery processing window period: determine the pumpability judgment parameters corresponding to the pumping and pushing process; and based on the pumpability judgment parameters corresponding to the pumping and pushing process and the preset pumping and pushing process The pumpability judgment parameter threshold of the material process is used to determine whether the pumpability of the material in the pumping and pushing process is poor; and the number of pumping and pushing processes in which the pumpability of the material is judged to be poor is counted to obtain number.

Optionally, in the embodiment of the present invention, the pumpability judgment parameter corresponding to the pumping and pushing process is the pumping pressure stability parameter, wherein the pumping pressure stability parameter corresponding to a pumping and pushing process reflects the stability of the pump. The discrete degree of pumping pressure during the feeding process.

Optionally, in the embodiment of the present invention, the pumping pressure trend parameter is a linear slope. Determining the linear slope according to the collected pumping pressure data includes: determining the pumping rate of each pumping and pushing process within the pumping processing window period. The average pressure; and based on the determined average pumping pressure, use the straight line fitting method to determine the slope of the straight line.

Optionally, in the embodiment of the present invention, the device further includes: a pumpability judgment parameter determination module for the pumping process, used to determine the pumpability judgment parameters corresponding to the pumping process, wherein the pumping equipment is currently in the pumping process. process; and a pumpability determination module in the pumping process, used to determine the pumpability of the material based on the pumpability judgment parameters corresponding to the pumping process and the preset pumpability judgment parameter threshold in the pumping process.

Optionally, in the embodiment of the present invention, the pumpability judgment parameter corresponding to the pumping process is the pumping pressure judgment parameter.

Optionally, in the embodiment of the present invention, the pumpability judgment parameter determination module in the pumping process determines the pumping pressure judgment parameters including: determining the pumping pressure average value and pressure curve characteristics within the pumping processing window period before the pump shutdown stage. And the pump stop time corresponding to the pump stop stage, where the pump stop stage is the stage when the pumping equipment does not pump materials before the pumping process; and based on the determined average pumping pressure, pressure curve characteristics and pump stop time, determine Pump starting pressure evaluation parameter.

Optionally, in the embodiment of the present invention, the pumpability determination module of the pumping process determines the pumpability of the material based on the pumpability judgment parameters corresponding to the pumping process and the preset pumpability judgment parameter threshold of the pumping process, including: When the pumpability judgment parameter corresponding to the pumping process is less than or equal to the preset pumpability judgment parameter threshold of the pumping process, it is determined that the pumpability of the material is not bad; and/or the pumpability corresponding to the pumping process is When the judgment parameter is greater than the preset pumpability judgment parameter threshold during the pumping process, the material is judged to have poor pumpability.

Optionally, in the embodiment of the present invention, the pumpability determination module during the pumping process is also used to: based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the pump pressure during the preset pumping processing window period The average pumping pressure threshold is used to classify materials that are judged to have good pumpability into good pumpability or average pumpability. Among them, the pump stop stage is the stage when the pumping equipment does not pump materials before the pumping process.

Optionally, in the embodiment of the present invention, the pumpability determination module during the pumping process is based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure within the preset pumping processing window period. The threshold value distinguishes materials that are judged to have good pumpability as good pumpability or pumpability generally includes: the average pumping pressure within the pumping process window period before the pump stop stage is less than or equal to the preset pumping process When the average pumping pressure threshold within the window period is reached, the material is judged to be pumpable; and/or the average pumping pressure within the pumping process window period before the pump shutdown stage is greater than the preset pumping process window period. When the average pumping pressure threshold is reached, the pumpability of the material is judged to be average.

The specific working principles and benefits of the device for determining the pumpability of materials provided by the embodiments of the present invention are similar to the specific working principles and benefits of the method for determining the pumpability of materials provided by the embodiments of the present invention, and will not be discussed here. Again.

In addition, another aspect of the embodiment of the present invention also provides a pumping control device, which includes: the device for determining the pumpability of materials as described in the above embodiment; and a control module for : When the pumping equipment for pumping materials is currently in the pumping process and the pumpability of the material is judged to be poor or average, use at least one of the pumping process improvement measures to control the pumping equipment, where, The set of measures to improve the pumping process include: increasing the rotational speed of the main pump of the pumping equipment, reducing the displacement current of the main pump of the pumping equipment, and increasing the displacement current of the constant pressure pump of the pumping equipment; and/or in When the pumping equipment is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measure sets is used to control the pumping equipment, where the pumping process improvement measure set Including: increasing the speed of the main pump of the pumping equipment and reducing the displacement current of the main pump of the pumping equipment.

Optionally, in the embodiment of the present invention, the pumping control device further includes: an early warning module, configured to: when the pumpability of the material is determined to be poor and the improvement measures fail to improve the pumpability of the material, Take early warning measures.

The specific working principles and benefits of the pumping control device provided by the embodiments of the present invention are similar to the specific working principles and benefits of the pumping control method provided by the embodiments of the present invention, and will not be described again here.

In addition, another aspect of the embodiment of the present invention also provides a construction machine, which includes the device for determining the pumpability of materials as described in the above embodiment or the pumping control device as described in the above embodiment. .

In addition, another aspect of the embodiments of the present invention also provides a machine-readable storage medium. The machine-readable storage medium stores instructions. The instructions are used to cause the machine to execute the method for determining materials described in the above embodiments. The pumpability method or the pumping control method described in the above embodiments.

The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner as long as there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, any combination of various embodiments of the present invention can also be carried out. As long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims

A method for determining the pumpability of materials, characterized in that the method includes:

Collect pumping pressure data within the pumping processing window period when pumping the material, wherein the pumping processing window period includes at least one pumping and pushing process, and the pumping equipment that pumps the material is currently in the pumping process. process;

Determine the pumpability judgment parameters corresponding to the pumping processing window period based on the collected pumping pressure data; and

The pumpability of the material is determined according to the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period.
The method according to claim 1, characterized in that the pumping processing window period includes a plurality of the pumping and pushing processes, and the pumpability judgment parameter corresponding to the pumping processing window period is pumping A pressure trend parameter, wherein the pumping pressure trend parameter reflects the trend of pumping pressure changes within the pumping processing window period.
The method according to claim 1, characterized in that the pumpability judgment parameter of the pumping process window period and the preset pumpability judgment parameter threshold value of the pumping process window period are used to determine the pumpability of the material. Pump properties include:

When the pumpability judgment parameter corresponding to the pumping processing window period is less than or equal to the pumpability judgment parameter threshold of the preset pumping processing window period, it is determined that the pumpability of the material is not poor; and / or

When the pumpability judgment parameter corresponding to the pumping processing window period is greater than the pumpability judgment parameter threshold value of the preset pumping processing window period, it is determined that the pumpability of the material is poor.
The method according to claim 3, characterized in that the pumping processing window period includes multiple pumping and pushing processes, and the method further includes:

Count the number of the pumping and pushing processes corresponding to the poor pumpability of the material in a single pumping and pushing process within the pumping processing window period; and

According to the counted number and the preset number threshold, the materials judged to have good pumpability are classified into good pumpability or average pumpability.
The method according to claim 4, characterized in that, according to the counted number and the preset number threshold, distinguishing the materials that are judged to have good pumpability as good pumpability or pumpability generally includes :

When the counted number is less than or equal to the preset number threshold, it is determined that the material has good pumpability; and/or

When the counted number is greater than the preset number threshold, it is determined that the pumpability of the material is average.
The method according to claim 4, characterized in that, within the pumping processing window period, the number of pumping materials corresponding to the poor pumpability of the material is determined during the single pumping and pushing process. The number of processes includes:

For any of the pumping and pushing processes within the pumping processing window period:

Determine the pumpability judgment parameters corresponding to the pumping and pushing process; and

According to the pumpability judgment parameter corresponding to the pumping and pushing process and the preset pumpability judgment parameter threshold of the pumping and pushing process, it is determined whether the pumpability of the material in the pumping and pushing process is poor. ;as well as

The number of pumping and pushing processes in which the pumpability of the material is judged to be poor is counted to obtain the number.
The method according to claim 6, characterized in that the pumpability judgment parameter corresponding to the pumping and pushing process is a pumping pressure stability parameter, wherein all the pumpability judgment parameters corresponding to the pumping and pushing process are The above-mentioned pumping pressure stability parameter reflects the degree of discreteness of the pumping pressure during the pumping and pushing process.
The method according to claim 7, characterized in that:

The pumping pressure stability parameter is the fluctuation coefficient,

For a pumping and pushing process, the fluctuation coefficient is the ratio of the pressure standard deviation of the pumping and pushing process to the average pumping pressure of the pumping and pushing process.
The method according to claim 2, wherein the pumping pressure trend parameter is a linear slope, and determining the linear slope according to the collected pumping pressure data includes:

Determining an average pumping pressure for each of the pumping and pushing processes within the pumping processing window period; and

Based on the determined average pumping pressure, a straight line fitting method is used to determine the slope of the straight line.
The method according to any one of claims 1-9, characterized in that the method further includes:

Determine the pumpability judgment parameters corresponding to the pumping process, wherein the pumping equipment is currently in the pumping process; and

The pumpability of the material is determined according to the pumpability judgment parameter corresponding to the pumping process and the preset pumpability judgment parameter threshold value of the pumping process.
The method according to claim 10, characterized in that the pumpability judgment parameter corresponding to the pumping process is a pumping pressure judgment parameter.
The method according to claim 11, characterized in that determining the pump pressure evaluation parameter includes:

Determine the pumping pressure average value and pressure curve characteristics within the pumping processing window period before the pump stop stage and the pump stop time corresponding to the pump stop stage, wherein the pump stop stage is the pump before the pump start process. stage where the delivery equipment is not pumping the material; and

Based on the determined pumping pressure average value, pressure curve characteristics and pump stop time, the pump starting pressure evaluation parameters are determined.
The method according to claim 10, characterized in that determining the pumpability of the material based on the pumpability judgment parameter corresponding to the pumping process and the preset pumpability judgment parameter threshold of the pumping process includes:

When the pumpability judgment parameter corresponding to the pumping process is less than or equal to the preset pumpability judgment parameter threshold of the pumping process, it is determined that the pumpability of the material is not poor; and/or

When the pumpability judgment parameter corresponding to the pumping process is greater than the preset pumpability judgment parameter threshold of the pumping process, it is determined that the pumpability of the material is poor.
The method of claim 13, further comprising:

According to the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure threshold value within the preset pumping processing window period, the materials that are judged to have good pumpability are classified as pumpable The pumpability is good or the pumpability is average, wherein the pumping stop stage is the stage when the pumping equipment does not pump the material before the pumping process.
The method according to claim 14, characterized in that it will be determined as acceptable based on the average pumping pressure within the pumping processing window period before the pump shutdown stage and the average pumping pressure threshold within the preset pumping processing window period. The materials with good pumpability are classified as having good pumpability or pumpability generally includes:

When the average pumping pressure within the pumping processing window period before the pump stop stage is less than or equal to the threshold of the average pumping pressure within the preset pumping processing window period, it is determined that the pumpability of the material is good; and / or

When the average pumping pressure within the pumping processing window period before the pump stop stage is greater than the threshold value of the average pumping pressure within the preset pumping processing window period, the pumpability of the material is determined to be average.
A pumping control method, characterized in that the pumping control method includes:

Determining the pumpability of a material according to the method of any one of claims 1-15; and

When the pumping equipment that pumps the material is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is adopted to improve the pumping equipment. Control is performed, wherein the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment, reducing the displacement current of the main pump of the pumping equipment, and increasing the the displacement current of the constant pressure pump; and/or

When the pumping equipment is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is used to control the pumping equipment, wherein , the set of measures to improve the pumping process includes: increasing the rotation speed of the main pump of the pumping equipment and reducing the displacement current of the main pump of the pumping equipment.
The pumping control method according to claim 16, characterized in that, when the pumpability of the material is determined to be poor and the improvement measures fail to improve the pumpability of the material, the pumping control Methods also include:

Take early warning measures.
A device for determining the pumpability of materials, characterized in that the device includes:

The collection module is used to collect the pumping pressure data within the pumping processing window period when pumping the material, wherein the pumping processing window period includes at least one pumping and pushing process, and the pumping process of the material is The device is currently in the pumping process;

A pumpability judgment parameter determination module during the pumping process, used to determine the pumpability judgment parameters corresponding to the pumping processing window period based on the collected pumping pressure data; and

The pumpability determination module of the pumping process is used to determine the pumpability of the material based on the pumpability judgment parameter corresponding to the pumping processing window period and the preset pumpability judgment parameter threshold value of the pumping processing window period. sex.
The device according to claim 18, wherein the pumping processing window period includes a plurality of the pumping and pushing processes, and the pumpability judgment parameter corresponding to the pumping processing window period is pumping A pressure trend parameter, wherein the pumping pressure trend parameter reflects the trend of pumping pressure changes within the pumping processing window period.
The device according to claim 18, wherein the pumping process pumpability determination module determines the pumpability based on the pumpability judgment parameter corresponding to the pumping processing window period and the pumpability of the preset pumping processing window period. The parameter thresholds for determining the pumpability of the material include:

When the pumpability judgment parameter corresponding to the pumping processing window period is less than or equal to the pumpability judgment parameter threshold of the preset pumping processing window period, it is determined that the pumpability of the material is not poor; and / or

When the pumpability judgment parameter corresponding to the pumping processing window period is greater than the pumpability judgment parameter threshold value of the preset pumping processing window period, it is determined that the pumpability of the material is poor.
A pumping control device, characterized in that the pumping control device includes:

The device of any one of claims 18-20; and

Control module for:

When the pumping equipment that pumps the material is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is adopted to improve the pumping equipment. Control is performed, wherein the pumping process improvement measure set includes: increasing the rotation speed of the main pump of the pumping equipment, reducing the displacement current of the main pump of the pumping equipment, and increasing the the displacement current of the constant pressure pump; and/or

When the pumping equipment is currently in the pumping process and the pumpability of the material is judged to be poor or average, at least one of the pumping process improvement measures is used to control the pumping equipment, wherein , the set of measures to improve the pumping process includes: increasing the rotation speed of the main pump of the pumping equipment and reducing the displacement current of the main pump of the pumping equipment.
The pumping control device according to claim 21, characterized in that the pumping control device further includes:

An early warning module is used to take early warning measures when the pumpability of the material is judged to be poor and improvement measures fail to improve the pumpability of the material.
A kind of engineering machinery, which is characterized in that the engineering machinery includes:

The device according to any one of claims 18-20; or

The pumping control device according to claim 21 or 22.
A machine-readable storage medium, characterized in that instructions are stored on the machine-readable storage medium, and the instructions are used to cause the machine to execute the method described in any one of claims 1-15 or 16 or 17. The pumping control method described above.