Stepless speed regulation control system for aggregate heating roller

Abstract

The invention discloses an aggregate heating roller stepless speed regulation control system, relates to the technical field of aggregate heating equipment, and solves the technical problems that in the prior art, an aggregate heating roller is difficult to cooperate for speed regulation control, the roller vibrates violently in the operation process, the equipment loss is large, and the quality of a hot mix asphalt finished product is low. The equipment regulation and control module is used for acquiring operation environment information and aggregate flow of the heating roller for comprehensive analysis, and calculating to obtain a rotation reference value of the heating roller; the rotation speed threshold value Wt of the heating roller is determined in an auxiliary mode according to the rotation reference value, so that the aggregate is fully heated, and the aggregate heating efficiency is improved; meanwhile, the vibration evaluation module is used for comparing an actual vibration characteristic value with a vibration reference value according to a mapping relation table between the rotating speed and the vibration characteristic value, and an overload reference index is obtained through calculation; and if the vibration is violent, the control center adjusts the rotation speed of the heating roller to a lower one-level speed level so as to ensure the normal operation of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of aggregate heating equipment, in particular to an aggregate heating roller stepless speed regulation control system. Background Art

[0002] Aggregate heating regeneration technology is a technology for recycling waste asphalt mixture. The mixture is proportioned according to demand, heated and dried by a drying drum, and then mixed with new asphalt mixture for use. Traditional hot asphalt mixture drying is to design the feed end of the drying drum into a combustion chamber, connect the burner to the combustion chamber, and use heat radiation to heat and dry the asphalt mixture;

[0003] However, the existing aggregate heating drum uses a simple material tumbling mixing method. Since adding asphalt pavement reclaimed material requires more heat energy and fusion time, the aggregate heating drum is difficult to coordinate with for speed control, which usually results in low quality of hot mix asphalt finished products. As the amount of material in the drum increases, the drum vibrates violently during operation, which causes greater equipment loss and high operating energy consumption. Based on the above shortcomings, the present invention proposes an aggregate heating drum stepless speed control system. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes an aggregate heating drum stepless speed regulation control system.

[0005] To achieve the above-mentioned object, the first aspect of the present invention provides an aggregate heating drum stepless speed regulation control system, comprising a feeding mechanism, an equipment monitoring module, a control center, a database, an equipment control module, a deep learning module and a vibration evaluation module;

[0006] The feeding mechanism is used to feed the aggregate into the interior of the heating drum, and a feed flow meter is installed on the feeding mechanism, and the feed flow meter is used to monitor the flow of the aggregate fed into the interior of the heating drum;

[0007] The equipment monitoring module is used to monitor the operating environment information of the heating drum in real time and upload the operating environment information to the control center; the operating environment information includes the temperature information, air pressure information and vibration information in the heating drum; the vibration information includes the vibration amplitude and vibration frequency;

[0008] The equipment control module is connected to the control center and is used to obtain the operating environment information of the heating drum and the aggregate flow rate for comprehensive analysis, and calculate the rotation reference value WB of the heating drum;

[0009] The control center is used to adjust the rotation speed of the heating roller to Wt according to the rotation speed threshold value Wt;

[0010] The deep learning module is used to obtain multiple sample rotation speeds of the heating drum and sample vibration characteristic values ​​corresponding to each sample rotation speed, and obtain a mapping relationship table between the rotation speed and the vibration characteristic value based on the AI ​​deep learning recognition algorithm; the vibration characteristic value is obtained based on the product of the vibration amplitude and the vibration frequency;

[0011] The vibration evaluation module is used to obtain the vibration characteristic value corresponding to the rotation speed threshold Wt according to the mapping relationship table between the rotation speed and the vibration characteristic value, and mark it as the vibration reference value; compare the actual vibration characteristic value with the vibration reference value, and calculate the overload reference index KW;

[0012] If the overload reference index KW is greater than a preset reference threshold, it is determined that the heating drum is vibrating violently and operating abnormally, and a vibration abnormality signal is generated; the control center is used to adjust the rotation speed of the heating drum to a lower speed level after receiving the vibration abnormality signal.

[0013] Furthermore, the specific analysis steps of the equipment control module are:

[0014] Obtain the operating environment information of the heating drum, mark the temperature information and air pressure information in the heating drum as WA and WY respectively; mark the pressure information of the inner wall of the heating drum as WF; mark the aggregate flow rate as WL;

[0015] The rotation reference value WB of the heating roller is calculated using the formula WB = (WF × b1 + WL × b2) / (WA × b3 + WY × b4), where b1, b2, b3, and b4 are all preset coefficient factors;

[0016] The rotation speed threshold of the heating roller is determined based on the rotation reference value WB, specifically:

[0017] A mapping relationship table between the rotation reference value range and the rotation speed threshold is pre-stored in the database; based on the mapping relationship table, the rotation speed threshold corresponding to the rotation reference value WB is determined and marked as Wt.

[0018] Furthermore, the inner wall of the heating drum is provided with a differential pressure transmitter, which is used to monitor the pressure of the inner wall of the heating drum in real time; when the pressure of the inner wall of the heating drum exceeds a preset pressure threshold, the control center controls the feeding mechanism to stop running.

[0019] Furthermore, the specific working steps of the vibration assessment module are as follows:

[0020] According to the vibration information of the heating roller obtained in real time, the actual vibration characteristic value is calculated;

[0021] The actual vibration characteristic value is compared with the vibration reference value to obtain the vibration overload value Zt; if Zt is less than 0, then Zt=0; within a preset time period, the vibration overload value Zt is integrated with respect to time to obtain the overload reference index KW.

[0022] Furthermore, the feeding mechanism is used to control the corresponding aggregate flow rate not to exceed a preset flow threshold.

[0023] Furthermore, the equipment monitoring module includes an air pressure sensor, a temperature sensor and a vibration sensor. The air pressure sensor is used to monitor the air pressure information in the heating drum in real time, the temperature sensor is used to monitor the temperature information of the aggregate in the heating drum in real time; and the vibration sensor is used to monitor the vibration information of the heating drum in real time.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The equipment control module in the present invention is used to obtain the operating environment information of the heating drum and the aggregate flow rate for comprehensive analysis, and calculate the rotation reference value WB of the heating drum; according to the rotation reference value WB, the rotation speed threshold of the heating drum is assisted to be determined as Wt; the control center is used to adjust the rotation speed of the heating drum to Wt according to the rotation speed threshold Wt; so that the aggregate is fully heated and the aggregate heating efficiency is improved;

[0026] 2. The vibration evaluation module in the present invention is used to compare the actual vibration characteristic value with the vibration reference value according to the mapping relationship table between the rotation speed and the vibration characteristic value, and calculate the overload reference index KW; if the overload reference index KW is greater than the preset reference threshold, it is determined that the heating roller is vibrating violently and operating abnormally at this time, and a vibration abnormality signal is generated; the control center is used to adjust the rotation speed of the heating roller to a lower speed level after receiving the vibration abnormality signal to ensure the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 The present invention is a system block diagram of an aggregate heating drum stepless speed regulation control system. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1 , the first aspect of the present invention provides an aggregate heating drum stepless speed control system, including a feeding mechanism, a differential pressure transmitter, an equipment monitoring module, a control center, an equipment control module, a database, a deep learning module and a vibration evaluation module;

[0031] The feeding mechanism is used to feed the aggregate into the interior of the heating drum. A feed flow meter is installed on the feeding mechanism. The feed flow meter is used to monitor the flow of the aggregate fed into the interior of the heating drum.

[0032] In this embodiment, the aggregate refers to asphalt mixture, and the feeding mechanism is used to control the corresponding aggregate flow rate not to exceed the preset flow rate threshold, so that the aggregate can enter the heating drum at an appropriate speed, avoid excessive aggregate feeding speed and excessive accumulation on the inner wall of the heating drum, and ensure the normal operation of the equipment;

[0033] The inner wall of the heating drum is provided with a differential pressure transmitter, which is used to monitor the pressure of the inner wall of the heating drum in real time; when the pressure of the inner wall of the heating drum exceeds the preset pressure threshold, the control center controls the feeding mechanism to stop running, to prevent excessive aggregate in the heating drum, which aggravates the adhesion of aggregate on the drum wall;

[0034] The equipment monitoring module is used to monitor the operating environment information of the heating drum in real time and upload the operating environment information to the control center; the operating environment information includes the temperature information, air pressure information and vibration information inside the heating drum; the vibration information includes the vibration amplitude and vibration frequency;

[0035] In this embodiment, the equipment monitoring module includes an air pressure sensor, a temperature sensor and a vibration sensor, wherein the air pressure sensor is used to monitor the air pressure information in the heating drum in real time, the temperature sensor is used to monitor the temperature information of the aggregate in the heating drum in real time; the vibration sensor is used to monitor the vibration information of the heating drum in real time;

[0036] The equipment control module is connected to the control center to obtain the operating environment information of the heating drum and the aggregate flow rate for comprehensive analysis, and to assist in determining the rotation speed of the heating drum; the specific analysis steps are:

[0037] Obtain the operating environment information of the heating drum, mark the temperature information and air pressure information in the heating drum as WA and WY respectively; mark the pressure information of the inner wall of the heating drum as WF; mark the aggregate flow rate as WL;

[0038] The rotation reference value WB of the heating roller is calculated using the formula WB = (WF × b1 + WL × b2) / (WA × b3 + WY × b4), where b1, b2, b3, and b4 are all preset coefficient factors; b1 takes the value (0, 0.2], b2 takes the value (0.1, 0.4], b3 takes the value (0.3, 0.35], and b4 takes the value (0, 0.1];

[0039] For example: b1 is 0.2, b2 is 0.4, b3 is 0.35, and b4 is 0.1; the temperature inside the heating drum is 170°C, the air pressure is 3 bar, i.e. 3 atmospheres; the pressure on the inner wall of the heating drum is 2 KPa, and the aggregate flow rate is 10 m 3 / min;

[0040] Then the rotation reference value of the heating roller WB=0.0736 is calculated by using the formula WB=(2×0.2+10×0.4) / (170×0.35+3×0.1)=0.0736;

[0041] The rotation speed threshold of the heating roller is determined based on the rotation reference value WB, specifically:

[0042] A mapping relationship table between the rotation reference value range and the rotation speed threshold is pre-stored in the database; the larger the rotation reference value, the larger the corresponding rotation speed threshold;

[0043] Based on the mapping relationship table, a rotation speed threshold corresponding to the rotation reference value WB is determined and marked as Wt; the control center is used to adjust the rotation speed of the heating drum to Wt according to the rotation speed threshold Wt, so that the aggregate is fully heated and the heating efficiency of the aggregate is improved;

[0044] A further technical solution is that: the deep learning module is used to obtain multiple sample rotation speeds of the heating drum and sample vibration characteristic values ​​corresponding to each sample rotation speed, and obtain a mapping relationship table between the rotation speed and the vibration characteristic value of the heating drum based on the AI ​​deep learning recognition algorithm;

[0045] In this embodiment, the vibration characteristic value is obtained based on the product of the vibration amplitude and the vibration frequency;

[0046] The vibration evaluation module is used to obtain the vibration characteristic value corresponding to the rotation speed threshold Wt according to the mapping relationship table between the rotation speed and the vibration characteristic value of the heating drum, and mark it as the vibration reference value;

[0047] According to the vibration information of the heating roller obtained in real time, the actual vibration characteristic value is calculated;

[0048] Compare the actual vibration characteristic value with the vibration reference value to obtain the vibration overload value Zt; if Zt is less than 0, set Zt=0;

[0049] In a preset time period, the vibration overload value Zt is integrated with time to obtain an overload reference index KW; the overload reference index KW is compared with a preset reference threshold value;

[0050] If the overload reference index KW is greater than the preset reference threshold, it is determined that the heating drum is vibrating violently and operating abnormally, and a vibration abnormality signal is generated; the vibration evaluation module is used to transmit the vibration abnormality signal to the control center, and the control center is used to adjust the rotation speed of the heating drum to a lower speed level after receiving the vibration abnormality signal to ensure the normal operation of the equipment.

[0051] Part of the data in the above formula is calculated by removing the dimension and taking its numerical value. The formula is a formula closest to the actual situation obtained by software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are set by technical personnel in this field according to actual conditions or obtained through simulation of a large amount of data.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An aggregate heating drum stepless speed control system, characterized in that: It includes feeding mechanism, equipment monitoring module, database, equipment control module, deep learning module and vibration assessment module; The feeding mechanism is used to feed the aggregate into the interior of the heating drum, and a feed flow meter is installed on the feeding mechanism, and the feed flow meter is used to monitor the flow of the aggregate fed into the interior of the heating drum; The equipment monitoring module is used to monitor the operating environment information of the heating drum in real time and upload the operating environment information to the control center; the operating environment information includes the temperature information, air pressure information and vibration information in the heating drum; the vibration information includes the vibration amplitude and vibration frequency; The equipment control module is connected to the control center and is used to obtain the operating environment information of the heating drum and the aggregate flow rate for comprehensive analysis, and calculate the rotation reference value WB of the heating drum; The control center is used to adjust the rotation speed of the heating roller to Wt according to the rotation speed threshold value Wt; The deep learning module is used to obtain multiple sample rotation speeds of the heating drum and sample vibration characteristic values ​​corresponding to each sample rotation speed, and obtain a mapping relationship table between the rotation speed and the vibration characteristic value based on the AI ​​deep learning recognition algorithm; the vibration characteristic value is obtained based on the product of the vibration amplitude and the vibration frequency; The vibration evaluation module is used to obtain the vibration characteristic value corresponding to the rotation speed threshold Wt according to the mapping relationship table between the rotation speed and the vibration characteristic value, and mark it as the vibration reference value; compare the actual vibration characteristic value with the vibration reference value, and calculate the overload reference index KW; If the overload reference index KW is greater than a preset reference threshold, it is determined that the heating drum is vibrating violently and operating abnormally, and a vibration abnormality signal is generated; the control center is used to adjust the rotation speed of the heating drum to a lower speed level after receiving the vibration abnormality signal.

2. The stepless speed control system for aggregate heating drum according to claim 1 is characterized in that: The specific analysis steps of the equipment control module are: Obtain the operating environment information of the heating drum, mark the temperature information and air pressure information in the heating drum as WA and WY respectively; mark the pressure information of the inner wall of the heating drum as WF; mark the aggregate flow rate as WL; The rotation reference value WB of the heating roller is calculated using the formula WB = (WF × b1 + WL × b2) / (WA × b3 + WY × b4), where b1, b2, b3, and b4 are all preset coefficient factors; The rotation speed threshold of the heating roller is determined based on the rotation reference value WB, specifically: A mapping relationship table between the rotation reference value range and the rotation speed threshold is pre-stored in the database; based on the mapping relationship table, the rotation speed threshold corresponding to the rotation reference value WB is determined and marked as Wt.

3. The stepless speed control system for aggregate heating drum according to claim 2 is characterized in that: The inner wall of the heating drum is provided with a differential pressure transmitter, which is used to monitor the pressure of the inner wall of the heating drum in real time; when the pressure of the inner wall of the heating drum exceeds a preset pressure threshold, the control center controls the feeding mechanism to stop running.

4. The stepless speed control system for aggregate heating drum according to claim 1 is characterized in that: The specific working steps of the vibration assessment module are as follows: According to the vibration information of the heating roller obtained in real time, the actual vibration characteristic value is calculated; The actual vibration characteristic value is compared with the vibration reference value to obtain the vibration overload value Zt; if Zt is less than 0, then Zt=0; within a preset time period, the vibration overload value Zt is integrated with respect to time to obtain the overload reference index KW.

5. The stepless speed control system for aggregate heating drum according to claim 1 is characterized in that: The feeding mechanism is used to control the corresponding aggregate flow rate not to exceed a preset flow threshold.

6. The stepless speed control system for aggregate heating drum according to claim 1 is characterized in that: The equipment monitoring module includes an air pressure sensor, a temperature sensor and a vibration sensor. The air pressure sensor is used to monitor the air pressure information in the heating drum in real time. The temperature sensor is used to monitor the temperature information of the aggregate in the heating drum in real time. The vibration sensor is used to monitor the vibration information of the heating drum in real time.

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