Liquid additive addition system and method

Abstract

The application provides a liquid additive adding system and method, which comprises a heating module, a weighing module and a spraying module; a first circulating module is connected between the heating module and the weighing module, and a second circulating module is connected between the weighing module and the spraying module; the heating module comprises a heating box; the weighing module comprises a weighing frame, a weighing barrel and a plurality of tension sensors, and the weighing barrel is arranged on the weighing frame through the tension sensors; the spraying module comprises a spraying box; the material is transmitted from the heating box to the weighing barrel through the first circulating module, and the material is transmitted from the weighing barrel to the spraying box through the second circulating module. The application has the beneficial effect that the cooperation of the first circulating pipe, the first reversing electromagnetic valve, the second circulating pipe and the second reversing electromagnetic valve on the first circulating module and the second circulating module can realize the precise control of the amount of the material input into the spraying module through the secondary measurement in the weighing process of the weighing module.

Description

Technical Field

[0001] This disclosure relates to the technical field of asphalt mixture mixing equipment, specifically to a liquid additive addition system and method. Background Technology

[0002] In the production of asphalt mixtures, due to differences in aggregate properties and asphalt composition, especially in cases where asphalt pavement milling material is recycled and reused, liquid additives are sometimes added to improve the properties of the mixture, thereby improving or enhancing pavement performance. The amount of additive added affects pavement performance; therefore, precise control of the liquid additive dosage is necessary to achieve the desired pavement performance indicators. Summary of the Invention

[0003] The purpose of this application is to address the above-mentioned problems by providing a liquid additive addition system and method.

[0004] In a first aspect, this application provides a liquid additive addition system, including a heating module, a weighing module, and a spraying module; a first circulation module is connected between the heating module and the weighing module, and a second circulation module is connected between the weighing module and the spraying module; the heating module includes a heating chamber; the weighing module includes a weighing frame, a weighing barrel, and a plurality of symmetrically arranged tension sensors, the weighing barrel being mounted on the weighing frame via each of the tension sensors; the spraying module includes a spraying box; the first circulation module includes a first output pipe, a first input pipe, a first circulation pipe, a first flow pump, and a first reversing solenoid valve, the first flow pump transferring material from the heating chamber to the first output pipe. The material is fed to the input end of the first reversing solenoid valve. The output end of the first reversing solenoid valve is connected to the ends of the first input pipe and the first circulation pipe, respectively. The other end of the first input pipe is inserted into the weighing barrel, and the other end of the first circulation pipe is inserted into the heating box. The second circulation module includes a second output pipe, a second input pipe, a second circulation pipe, a second flow pump, and a second reversing solenoid valve. The second flow pump transmits the material in the weighing barrel to the input end of the second reversing solenoid valve through the second output pipe. The output end of the second reversing solenoid valve is connected to the ends of the second input pipe and the second circulation pipe, respectively. The other end of the second input pipe is inserted into the spray box, and the other end of the second circulation pipe is inserted into the weighing barrel.

[0005] According to the technical solution provided in the embodiments of this application, the bottom of the heating box is provided with a heating element, the heating box is provided with a temperature sensor, and the bottom and top of the heating box are respectively provided with a first liquid level sensor and a second liquid level sensor.

[0006] According to the technical solution provided in the embodiments of this application, it also includes an electrical control module, which includes a PLC controller and a touch screen. The PLC controller is electrically connected to the heating module, the weighing module and the spraying module.

[0007] According to the technical solution provided in the embodiments of this application, a first one-way valve is provided at the end of the first input pipe that extends into the heating box, and a second one-way valve is provided at the end of the second input pipe that extends into the weighing barrel.

[0008] According to the technical solution provided in the embodiments of this application, the first reversing solenoid valve and the second reversing solenoid valve are preferably configured as pneumatic three-way valves.

[0009] According to the technical solution provided in the embodiments of this application, the bottom of the heating box is provided with a first outlet, and the first outlet is provided with a first shut-off valve; the bottom of the weighing barrel is provided with a second outlet, and the second outlet is provided with a second shut-off valve.

[0010] According to the technical solution provided in the embodiments of this application, a third liquid level sensor is provided at the top of the weighing barrel.

[0011] According to the technical solution provided in the embodiments of this application, the top of the spraying box is provided with a spraying pipe with a nozzle, the spraying box is provided with a stirrer, the outside of the spraying box is provided with an air pump and a switch solenoid valve, the output end of the air pump is connected to the input end of the spraying pipe, and a switch solenoid valve is provided between the air pump and the spraying pipe.

[0012] According to the technical solution provided in the embodiments of this application, three tension sensors are preferably provided, and the three tension sensors are symmetrically connected to the weighing barrel.

[0013] Secondly, this application provides a method for adding a liquid additive, comprising the following steps:

[0014] Temperature detection: The temperature sensor is used to detect the temperature of the material in the heating chamber and determine whether the material temperature is greater than or equal to the set minimum temperature value: if yes, proceed to the next step; if no, start PID temperature regulation to further heat the material in the heating chamber.

[0015] First weight check: The weight of the material in the weighing bucket is detected by a tension sensor to determine whether the material weight is less than or equal to the set minimum weight value: if yes, proceed to the next step; if no, repeat the first weight check.

[0016] Start the first flow pump: This allows the material in the heating chamber to be supplied to the weighing barrel;

[0017] Second weight check: The weight of the material in the weighing barrel is detected using a tension sensor to determine whether the material weight is greater than or equal to the set maximum weight value: if yes, proceed to the next step; if no, repeat the second weight check.

[0018] The first reversing solenoid valve switches: it causes the material in the heating box to enter the self-circulation mode, and no more material is input into the weighing bucket. The material circulates in the heating box through the first circulation pipe.

[0019] Stop the first flow pump: This prevents the heating chamber from feeding material into the weighing barrel;

[0020] Determine if there is a spraying signal: If yes, proceed to the next step; if no, continue to determine if there is a spraying signal.

[0021] Start the second flow pump: This allows the material in the weighing tank to be fed into the spray box;

[0022] Third weight check: Check the weight of the material in the weighing barrel and determine whether the decrease in the weight of the material in the weighing barrel is greater than or equal to the set spray value: if yes, proceed to the next step; if no, repeat the third weight check.

[0023] The second reversing solenoid valve switches: when the weight of the material input from the weighing tank into the spray box reaches the set spray value, the second reversing solenoid valve switches and the material in the weighing tank enters the self-circulation mode, and the material circulates through the second circulation pipe.

[0024] Stop the second flow pump: This prevents the weighing tank from feeding material into the spray box.

[0025] The beneficial effects of this invention are as follows: This application provides a liquid additive addition system and method. The material is heated in a heating chamber and then transferred to a weighing tank. After weighing in the weighing tank, the material is transferred to a spraying box for spraying. To accurately control the amount of material sprayed in the spraying box, a weighing module is needed to accurately measure and output the amount of material. Through the coordinated use of the first circulation pipe, the first reversing solenoid valve, the second circulation pipe, and the second reversing solenoid valve on the first and second circulation modules, a subtractive secondary metering can be performed during the weighing process in the weighing module, achieving precise control of the amount of material input to the spraying module. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the system structure according to the first embodiment of this application;

[0027] Figure 2 This is a flowchart of the second embodiment of this application;

[0028] The text labels in the diagram represent: 100, heating box; 110, heating element; 120, temperature sensor; 130, first liquid level sensor; 140, second liquid level sensor; 150, first shut-off valve; 200, weighing tank; 210, weighing frame; 220, tension sensor; 230, second shut-off valve; 240, third liquid level sensor; 300, spraying box; 310, spraying pipe; 320, agitator; 330, nozzle; 410, first output pipe; 411, first check valve; 511, second check valve; 420, first input pipe; 430, first circulation pipe; 440, first flow pump; 450, first reversing solenoid valve; 510, second output pipe; 520, second input pipe; 530, second circulation pipe; 540, second flow pump; 550, second reversing solenoid valve; 610, air pump; 620, switch solenoid valve. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present application will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present application in any way.

[0030] like Figure 1 The diagram shown is a schematic of the first embodiment of this application, including a heating module, a weighing module, and a spraying module; a first circulation module is connected between the heating module and the weighing module, and a second circulation module is connected between the weighing module and the spraying module; the heating module includes a heating box 100; the weighing module includes a weighing frame 210, a weighing barrel 200, and a plurality of symmetrically arranged tension sensors 220, the weighing barrel 200 being mounted on the weighing frame 210 via each of the tension sensors 220; the spraying module includes a spraying box 300.

[0031] In this embodiment, after the material is heated in the heating box 100, it is transferred to the weighing bucket 200 through the first circulation module. After the material is weighed in the weighing bucket 200, it is transferred to the spraying box 300 through the second circulation module for spraying.

[0032] The first circulation module includes a first output pipe 410, a first input pipe 420, a first circulation pipe 430, a first flow pump 440, and a first reversing solenoid valve 450. The first flow pump 440 transfers the material in the heating box 100 to the input end of the first reversing solenoid valve 450 through the first output pipe 410. The output end of the first reversing solenoid valve 450 is connected to the ends of the first input pipe 420 and the first circulation pipe 430, respectively. The other end of the first input pipe 420 is inserted into the weighing barrel 200, and the other end of the first circulation pipe 430 is inserted into the heating box 100.

[0033] The second circulation module includes a second output pipe 510, a second input pipe 520, a second circulation pipe 530, a second flow pump 540, and a second reversing solenoid valve 550. The second flow pump 540 transfers the material in the weighing tank 200 to the input end of the second reversing solenoid valve 550 through the second output pipe 510. The output end of the second reversing solenoid valve 550 is connected to the ends of the second input pipe 520 and the second circulation pipe 530, respectively. The other end of the second input pipe 520 is inserted into the spray box 300, and the other end of the second circulation pipe 530 is inserted into the weighing tank 200.

[0034] Taking the material transfer between the weighing tank 200 and the spray box 300 as an example: When the material does not need to be input from the weighing tank 200 into the spray box 300, the material in the heating box 100 flows sequentially through the second flow pump 540, the second reversing solenoid valve 550, and the second circulation pipe 530, and finally flows back into the weighing tank 200. Therefore, the material circulates within the second circulation module. When the material needs to be input into the spray box 300, the second reversing solenoid valve 550 switches and reverses, allowing the material to flow through the second reversing solenoid valve 550 and then through the second input... The material flows into the spray box 300 through pipe 520. When the material flowing into the spray box 300 reaches the set value, the second reversing solenoid valve 550 reverses again, causing the material in the second output pipe 510 and the second reversing solenoid valve 550 to flow back into the weighing tank 200 through the second circulation pipe 530. This achieves a subtractive secondary weighing of the material output from the weighing tank 200. In other words, the intermediate material in the second circulation module flows back into the weighing tank 200 with the reversal of the second reversing solenoid valve 550, achieving accurate weight of the material output into the spray box 300 and eliminating errors in the weight of the material in the second circulation module. Similarly, by setting the first circulation module, the weight of the material flowing into the weighing tank 200 from the heating box 100 is the net weight of the material, eliminating errors in the weight of the material in the first circulation module and achieving accurate measurement of the material output and spray volume.

[0035] In a preferred embodiment, a heating element 110 is provided at the bottom of the heating chamber 100, a temperature sensor 120 is provided inside the heating chamber 100, and a first liquid level sensor 130 and a second liquid level sensor 140 are respectively provided at the bottom and top of the heating chamber 100. The heating element 110 is used to heat the material inside the heating chamber 100. When the material temperature detected by the temperature sensor 120 inside the heating chamber 100 is consistent with the preset temperature, the heating element 110 stops heating. In this embodiment, the heating element 110 and the temperature sensor 120 are regulated by PID feedback control to accurately control the temperature inside the heating chamber 100.

[0036] In a preferred embodiment, the system further includes an electrical control module, which comprises a PLC controller and a touch screen. The PLC controller is electrically connected to the heating module, weighing module, and spraying module. In this embodiment, the PLC controller serves as the control center for the heating module, weighing module, and spraying module, controlling each pump and valve body, and receiving data from sensors such as temperature sensor 120, liquid level sensor, and tension sensor 220.

[0037] In a preferred embodiment, a first one-way valve 411 is provided at the end of the first input pipe 420 that extends into the heating box 100, and a second one-way valve 511 is provided at the end of the second input pipe 520 that extends into the weighing bucket 200. In this preferred embodiment, one-way valves are provided on the first input pipe 420 and the second input pipe 520 respectively, mainly to prevent the backflow of the sucked-out material. In this embodiment, the sucked-out material flows back through a circulation pipe.

[0038] Preferably, the first reversing solenoid valve 450 and the second reversing solenoid valve 550 are configured as pneumatic three-way valves.

[0039] In a preferred embodiment, the heating chamber 100 has a first outlet at its bottom, and a first shut-off valve 150 is provided on the first outlet. In this embodiment, when the first shut-off valve 150 is opened, the material is discharged from the heating chamber 100 through the first outlet.

[0040] In a preferred embodiment, the weighing drum 200 has a second outlet at its bottom, and a second shut-off valve 230 is provided on the second outlet. In this embodiment, when the second shut-off valve 230 is opened, the material is discharged from the weighing drum 200 through the second outlet.

[0041] In a preferred embodiment, a third liquid level sensor 240 is provided at the top of the weighing tank 200. In this embodiment, the third liquid level sensor 240 is used to monitor the volume of material inside the weighing tank 200.

[0042] In a preferred embodiment, the spraying box 300 has a spray pipe 310 with nozzles 330 at its top, and a stirrer 320 is installed inside the spraying box 300. The material is sprayed out from the nozzles 330 of the spray pipe 310 and stirred by the stirrer 320 within the spraying box 300. In this preferred embodiment, the nozzles 330 are air atomizing nozzles, achieving uniform spraying and helping to reduce stirring time.

[0043] In this preferred embodiment, an air pump 610 and a solenoid valve 620 are provided outside the spray box 300. The output end of the air pump 610 is connected to the input end of the spray pipe 310, and the solenoid valve 620 is provided between the air pump 610 and the spray pipe 310.

[0044] In a preferred embodiment, three tension sensors 220 are preferably provided, and the three tension sensors 220 are symmetrically connected to the weighing bucket 200.

[0045] like Figure 2 The diagram shown is a flowchart of a second embodiment of this application. This embodiment describes a method for adding liquid additives using the first embodiment, and includes the following steps:

[0046] Temperature detection: The temperature of the material inside the heating chamber is detected by a temperature sensor. When the material temperature is greater than or equal to the set minimum temperature value, the next step is executed. If it is less than the set minimum temperature value, PID temperature regulation is started to further heat the material inside the heating chamber.

[0047] First weight check: The weight of the material in the weighing bucket is detected by a tension sensor to determine whether the material weight is less than or equal to the set minimum weight value: if yes, proceed to the next step; if no, repeat the first weight check.

[0048] Start the first flow pump: This allows the material in the heating chamber to be supplied to the weighing barrel;

[0049] Second weight check: The weight of the material in the weighing barrel is detected using a tension sensor to determine whether the material weight is greater than or equal to the set maximum weight value: if yes, proceed to the next step; if no, repeat the second weight check.

[0050] The first reversing solenoid valve switches: it causes the material in the heating box to enter the self-circulation mode, and no more material is input into the weighing bucket. The material circulates in the heating box through the first circulation pipe.

[0051] Stop the first flow pump: This prevents the heating chamber from feeding material into the weighing barrel;

[0052] Determine if there is a spraying signal: If yes, proceed to the next step; if no, continue to determine if there is a spraying signal.

[0053] Start the second flow pump: This allows the material in the weighing tank to be fed into the spray box;

[0054] Third weight check: Check the weight of the material in the weighing barrel and determine whether the decrease in the weight of the material in the weighing barrel is greater than or equal to the set spray value: if yes, proceed to the next step; if no, repeat the third weight check.

[0055] The second reversing solenoid valve switches: when the weight of the material input from the weighing tank into the spray box reaches the set spray value, the second reversing solenoid valve switches and the material in the weighing tank enters the self-circulation mode, and the material circulates through the second circulation pipe.

[0056] Stop the second flow pump: This prevents the weighing tank from feeding material into the spray box.

[0057] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the method and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of this application to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A liquid additive addition system, characterized in that, It includes a heating module, a weighing module, and a spraying module; a first circulation module is connected between the heating module and the weighing module, and a second circulation module is connected between the weighing module and the spraying module; The heating module includes a heating box; the weighing module includes a weighing frame, a weighing barrel, and multiple symmetrically arranged tension sensors, with the weighing barrel mounted on the weighing frame via each of the tension sensors; the spraying module includes a spraying box. The first circulation module includes a first output pipe, a first input pipe, a first circulation pipe, a first flow pump, and a first reversing solenoid valve. The first flow pump transmits the material in the heating box to the input end of the first reversing solenoid valve through the first output pipe. The output end of the first reversing solenoid valve is connected to the ends of the first input pipe and the first circulation pipe, respectively. The other end of the first input pipe is inserted into the weighing barrel, and the other end of the first circulation pipe is inserted into the heating box. The second circulation module includes a second output pipe, a second input pipe, a second circulation pipe, a second flow pump, and a second reversing solenoid valve. The second flow pump transfers the material in the weighing barrel to the input end of the second reversing solenoid valve through the second output pipe. The output end of the second reversing solenoid valve is connected to the ends of the second input pipe and the second circulation pipe, respectively. The other end of the second input pipe is inserted into the spray box, and the other end of the second circulation pipe is inserted into the weighing barrel. When the weight of the material input from the weighing barrel into the spraying box reaches the set spraying value, the second reversing solenoid valve switches and the material in the weighing barrel enters the self-circulation mode, and the material circulates through the second circulation pipe. Three tension sensors are provided, and the three tension sensors are symmetrically connected to the weighing barrel; By using the first circulation pipe, the first reversing solenoid valve, the second circulation pipe, and the second reversing solenoid valve on the first circulation module and the second circulation module in combination, a subtractive secondary metering can be performed during the weighing process of the weighing module to achieve precise control of the amount of material input to the spraying module. The method for adding liquid additives includes the following steps: Temperature detection: The temperature sensor is used to detect the temperature of the material in the heating chamber and determine whether the material temperature is greater than or equal to the set minimum temperature value: if yes, proceed to the next step; if no, start PID temperature regulation to further heat the material in the heating chamber. First weight check: The weight of the material in the weighing bucket is detected by a tension sensor to determine whether the material weight is less than or equal to the set minimum weight value: if yes, proceed to the next step; if no, repeat the first weight check. Start the first flow pump: This allows the material in the heating chamber to be supplied to the weighing barrel; Second weight check: The weight of the material in the weighing barrel is detected using a tension sensor to determine whether the material weight is greater than or equal to the set maximum weight value: if yes, proceed to the next step; if no, repeat the second weight check. The first reversing solenoid valve switches: it causes the material in the heating box to enter the self-circulation mode, and no more material is input into the weighing bucket. The material circulates in the heating box through the first circulation pipe. Stop the first flow pump: This prevents the heating chamber from feeding material into the weighing barrel; Determine if there is a spraying signal: If yes, proceed to the next step; if no, continue to determine if there is a spraying signal. Start the second flow pump: This allows the material in the weighing tank to be fed into the spray box; Third weight check: Check the weight of the material in the weighing barrel and determine whether the decrease in the weight of the material in the weighing barrel is greater than or equal to the set spray value: if yes, proceed to the next step; if no, repeat the third weight check. The second reversing solenoid valve switches: when the weight of the material input from the weighing tank into the spray box reaches the set spray value, the second reversing solenoid valve switches and the material in the weighing tank enters the self-circulation mode, and the material circulates through the second circulation pipe. Stop the second flow pump: This prevents the weighing tank from feeding material into the spray box.

2. The liquid additive addition system according to claim 1, characterized in that, The heating chamber is equipped with a heating element at the bottom and a temperature sensor inside. A first liquid level sensor and a second liquid level sensor are respectively installed at the bottom and top of the heating chamber.

3. The liquid additive addition system according to claim 2, characterized in that, It also includes an electrical control module, which includes a PLC controller and a touch screen. The PLC controller is electrically connected to the heating module, the weighing module, and the spraying module.

4. The liquid additive addition system according to claim 1, characterized in that, The end of the first input pipe that extends into the heating box is equipped with a first check valve, and the end of the second input pipe that extends into the weighing barrel is equipped with a second check valve.

5. The liquid additive addition system according to claim 1, characterized in that, The first and second reversing solenoid valves are configured as pneumatic three-way valves.

6. The liquid additive addition system according to claim 1, characterized in that, The heating box has a first outlet at its bottom, and a first shut-off valve is provided at the first outlet; the weighing barrel has a second outlet at its bottom, and a second shut-off valve is provided at the second outlet.

7. The liquid additive addition system according to claim 1, characterized in that, A third liquid level sensor is installed at the top of the weighing tank.

8. The liquid additive addition system according to claim 1, characterized in that, The spraying box is equipped with a spraying pipe with nozzles at the top, and a stirrer is installed inside the spraying box. An air pump and a solenoid valve are installed outside the spraying box. The output end of the air pump is connected to the input end of the spraying pipe, and a solenoid valve is installed between the air pump and the spraying pipe.

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