Control method and control system of automatic heating nozzle for spreading paver

Abstract

The invention discloses a control method and a control system of an automatic heating nozzle for a spreading paver, which are characterized in that the heating state of a nozzle assembly is identified, a temperature signal of the nozzle assembly and a temperature signal of a bonding material are respectively collected, an acceptable first temperature difference N and an acceptable second temperature difference F are set, the collected temperature signals are compared, and the temperature difference is determined according to the comparison result. And adjusting the heating function of the nozzle assembly to open or close according to the heating state of the nozzle assembly and the temperature difference comparison result. According to the invention, the temperature of the nozzle assembly and the temperature of the bonding material can be monitored in real time, and the opening or closing of the heating function of the nozzle assembly can be adjusted in real time, so that the temperature of the nozzle assembly is consistent with the temperature of the bonding material, and the uniformity and accuracy of the spraying of the bonding material are improved.

Description

Technical Field

[0001] The invention relates to the technical field of road construction machinery, and in particular to a control method and a control system for an automatic heating nozzle of a spreading and spreading machine. Background Art

[0002] The spreading paver is a road ultra-thin wearing layer construction equipment, which is mainly used for the maintenance and construction of high-grade highway wearing layers. During the construction process, the uniformity and accuracy of the adhesive material spraying amount play a key role in the construction effect and construction cost. In order to ensure the uniformity and accuracy of the adhesive material spraying during the construction process, the spreading accuracy of the spreading nozzle assembly is required to be high during the working process. However, the adhesive material is usually a temperature-sensitive material. During the spraying process from the spraying pipe to the nozzle assembly during construction, temperature changes can easily lead to demulsification and adhesion of the nozzle assembly, which has a great impact on the spreading accuracy of the nozzle assembly and ultimately affects the construction quality. Summary of the invention

[0003] In order to solve the problem of spraying quality caused by demulsification due to temperature difference when spraying adhesive materials, the present invention proposes an automatic heating nozzle control method and control system for a spreading and paving machine, which controls the automatic opening and closing time of the heating function of the nozzle assembly, realizes the synchronization of the nozzle assembly temperature with the pipeline and tank temperature, and avoids demulsification of the sprayed adhesive material due to temperature difference.

[0004] To achieve the above object, the specific technical solution of the present invention is: a control method for an automatic heating nozzle for a spreading paving machine, comprising the following steps: S1 identifies the nozzle heating status; S2 collects the nozzle component temperature signal and the bonding material temperature signal respectively, and identifies the nozzle component temperature T 喷嘴 and bonding material temperature T 粘结 ; S3 sets a first temperature difference N between the nozzle assembly and the adhesive material and a nozzle assembly difference F; S4 compares the collected temperature of the nozzle assembly with the temperature of the bonding material; S5 selects to turn on or off the nozzle heating according to the comparison result between the nozzle assembly temperature and the bonding material temperature.

[0005] Specifically, in step S1, the nozzle heating state includes a nozzle assembly heating function off state and a nozzle heating state.

[0006] Furthermore, in step S2, collecting the nozzle assembly temperature signal is specifically: During normal temperature collection, the nozzle component temperature T 喷嘴 The average value of the temperature values ​​collected by the nozzle assembly temperature sensor; When the signal of any one or more nozzle assembly temperature sensors is shielded, when calculating the nozzle assembly temperature value corresponding to the nozzle assembly temperature sensor, the temperature value collected by the nozzle assembly temperature sensor no longer participates in the logic calculation; When a nozzle assembly temperature sensor is assigned a value, the signal values ​​of the remaining nozzle assembly temperature sensors participating in the control system operation are all the assigned values, and the temperature values ​​collected and identified by themselves no longer participate in the control and operation.

[0007] Furthermore, in step S3, the first temperature difference N between the nozzle assembly and the adhesive material is the temperature difference between the nozzle assembly temperature and the adhesive material temperature when the nozzle assembly heating function is turned off, that is, N=T 粘接 -T 喷嘴 , N>0, at this time, the temperature of the nozzle assembly is lower than the temperature of the bonding material; The difference F between the nozzle assembly and the bonding material is the temperature difference between the nozzle assembly temperature and the bonding material temperature when the nozzle is heated, that is, F = T 喷嘴 -T 粘接 , F>0, at this time, the temperature of the nozzle assembly is higher than the temperature of the adhesive material.

[0008] Furthermore, in step S5, the control logic for turning on or off the nozzle heating is specifically as follows: When the nozzle heating state is identified as the nozzle component heating function is off, if the nozzle component temperature T 喷嘴 Below the bonding temperature, and T 喷嘴 ≤T 粘接 -N, turn on the nozzle assembly heating function to heat the nozzle assembly; if the nozzle assembly temperature T 喷嘴 ﹥T 粘接 -N, the nozzle assembly heating function is not turned on; When the nozzle heating state is identified as nozzle heating, if the nozzle assembly temperature Tnozzle is higher than the temperature of the adhesive material, and T 喷嘴 ﹥T 粘接 +F turns off the nozzle assembly heating function.

[0009] Specifically, the first temperature difference N is determined according to the stability of the material, and the nozzle assembly difference F is determined according to the material of the nozzle assembly and the power of the heating system.

[0010] Furthermore, the bonding material temperature T 粘接 The specific steps for monitoring and adjustment are as follows: S6 sets the minimum construction temperature of the bonding material to T 下限 ; If S7 detects the bonding material temperature T 粘接 Lower than the minimum construction temperature T 下限 When the temperature is too low, the bonding material is heated up, and a feedback signal is given to send out an alarm message. S8 If the temperature value difference between the nozzle assemblies on a single spraying beam exceeds the set accuracy deviation of the temperature sensor, a feedback signal is sent and an alarm message is issued to check the temperature sensor fault information.

[0011] In order to realize the above-mentioned automatic heating nozzle control method for a spreading and paving machine, the present invention also discloses a control system for an automatic heating nozzle for a spreading and paving machine, comprising a tank body, a conveying pipeline, a tank body temperature sensor, at least one spraying beam body, a nozzle assembly temperature sensor and a control system, wherein the tank body is used to store adhesive material and heat the adhesive material; One end of the conveying pipeline is connected to the tank body, and the other end is connected to the spraying beam body, so as to convey the adhesive material in the tank body to the spraying beam body; The tank temperature sensor is arranged on the tank and connected to the control system for real-time monitoring of the temperature of the bonding material in the tank and the conveying pipeline; The tank body is also provided with a heating component, which is connected to the control system and is used to heat the adhesive material in the tank body; The spraying beam body comprises a spraying beam and a nozzle assembly, and the nozzle assembly is arranged on the spraying beam; The nozzle assembly temperature sensor is arranged at the connection between the spray beam and the nozzle assembly and is connected to the control system for real-time monitoring of the nozzle assembly temperature; The nozzle assembly comprises a spray pipe, a nozzle and a heating assembly. One end of the spray pipe is fixed on the spray beam and the other end is connected to the nozzle. The heating assembly is arranged in the spray pipe and the nozzle and connected to the control system for heating the nozzle assembly.

[0012] Furthermore, there is at least one nozzle assembly, and when the number of nozzle assemblies on a single spraying beam is greater than or equal to 3, at least 3 nozzle assembly temperature sensors are installed on the single spraying beam; When the number of nozzle assemblies on a single spraying beam is less than 3, the number of nozzle assembly temperature sensors is equal to the number of nozzle assemblies; The nozzle assembly temperature sensors are evenly distributed on the spray beam according to the actual position of the nozzle assembly, and are used to measure the temperature values ​​of different point areas of the spray beam.

[0013] An output terminal is also provided, and the output terminal is connected to the control system and is used to set and shield any nozzle assembly temperature sensor signal, or to assign a value to each nozzle assembly temperature sensor.

[0014] Beneficial effects of the present invention: 1. By real-time monitoring of the working status of the nozzle assembly and the temperature difference between the nozzle assembly temperature and the bonding material temperature, the opening and closing time of the nozzle assembly heating function is controlled so that the temperature of the nozzle assembly is synchronized with the temperature of the bonding material, which can avoid demulsification of the sprayed bonding material due to temperature difference and improve the uniformity and accuracy of the bonding material spraying; 2. Real-time monitoring of the temperature of the spraying material during working state, and automatic adjustment of the spraying material temperature to be consistent with the preset working temperature to ensure the normal spraying work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application 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. The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. For those skilled in the art, other drawings can be obtained based on the drawings without paying creative work.

[0016] Figure 1 This is an overall flow chart of the control method of the automatic heating nozzle for the spreading and paving machine of the present invention; Figure 2 Running a logic diagram for an embodiment of the present invention; Figure 3 This is a flow chart of temperature control of bonding materials in an embodiment of the present invention; Figure 4 Schematic diagram of the control system structure of an embodiment of the present invention.

[0017] Among them: 1. tank body; 11. tank body temperature sensor; 2. delivery pipeline; 3. spraying beam body; 31. spraying beam; 32. nozzle assembly; 321. spraying pipeline; 322. nozzle; 33. nozzle assembly temperature sensor; 4. control system; 5. output end. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0019] Reference Figure 1 As shown, an embodiment of the present invention discloses a control method for an automatic heating nozzle for a spreading and spreading machine, comprising the following steps: S1 identifies the nozzle heating status; S2 collects the temperature signal of the nozzle assembly and the temperature signal of the bonding material respectively, and identifies the temperature of the nozzle assembly Tnozzle and the temperature of the bonding material Tbond; S3 sets a first temperature difference N between the nozzle assembly and the adhesive material and a nozzle assembly difference F; S4 compares the collected temperature of the nozzle assembly with the temperature of the bonding material; S5 selects to turn on or off the nozzle heating according to the comparison result between the nozzle assembly temperature and the bonding material temperature.

[0020] Among them, in step S1, the nozzle assembly heating state includes the nozzle assembly heating function off state and the nozzle assembly heating state. Before identifying the nozzle temperature and the bonding material temperature, it is first necessary to identify whether the nozzle assembly heating function is in the on state or the off state.

[0021] In step S2, the temperature signal of the nozzle assembly is collected as follows: During normal temperature collection, the nozzle component temperature T 喷嘴 The average value of the temperature values ​​collected by the nozzle assembly temperature sensor; When the signal of any one or more nozzle assembly temperature sensors is shielded, when calculating the nozzle assembly temperature value corresponding to the nozzle assembly temperature sensor, the temperature value collected by the nozzle assembly temperature sensor no longer participates in the logic calculation; When a nozzle assembly temperature sensor is assigned a value, the signal values ​​of the remaining nozzle assembly temperature sensors participating in the control system operation are all the assigned values, and the temperature values ​​collected and identified by themselves no longer participate in the control and operation.

[0022] In step S3, when the nozzle assembly heating function is turned off, an acceptable first temperature difference N is set according to the stability of the adhesive material. When the nozzle assembly temperature is lower than the adhesive material temperature and the temperature difference is within T 粘接 -N range is acceptable, that is, the first temperature difference N between the nozzle assembly and the adhesive material is the temperature difference between the adhesive material temperature and the nozzle assembly temperature, N = T 粘接 -T 喷嘴 , N>0; When the nozzle is heated, an acceptable second temperature difference F is set according to the nozzle component material and the heating system power. The nozzle component temperature is higher than the bonding material temperature, and the temperature difference is within T 喷嘴 -F range is acceptable, that is, the second temperature difference F between the nozzle assembly and the bonding material is the temperature difference between the nozzle assembly temperature and the bonding material temperature, F = T 喷嘴 -T 粘接 , F﹥0.

[0023] refer to Figure 2 As shown, in step S5, the control logic for turning on or off the nozzle heating is specifically as follows: When the nozzle heating state is identified as the nozzle component heating function is off, if the nozzle component temperature T 喷嘴 Below the bonding temperature, and T 喷嘴 ≤T 粘接 -N, turn on the nozzle assembly heating function to heat the nozzle assembly; if the nozzle assembly temperature T 喷嘴 ﹥T 粘接 -N, the nozzle assembly heating function is not turned on; When the nozzle heating state is identified as nozzle heating, if the nozzle assembly temperature Tnozzle is higher than the temperature of the adhesive material, and T 喷嘴 ﹥T 粘接 +F turns off the nozzle assembly heating function.

[0024] Reference Figure 3 As shown in the figure, in addition to the temperature regulation of the nozzle assembly, in order to stabilize the temperature of the adhesive material, the adhesive material temperature T is also set 粘接 The specific steps for monitoring and adjustment are as follows: S6 sets the minimum construction temperature of the bonding material to T 下限 ; If S7 identifies that the temperature of the adhesive material Tbonding is lower than the minimum construction temperature T 下限 When the temperature is too low, the bonding material is heated up, and a feedback signal is given to send out an alarm message. S8 If the temperature value difference between the nozzle assemblies on a single spraying beam exceeds the set accuracy deviation of the temperature sensor, a feedback signal is sent and an alarm message is issued to check the temperature sensor fault information.

[0025] refer to Figure 4 As shown, in order to realize the automatic heating nozzle control method for a spreading and paving machine of the above embodiment, the present invention also discloses an embodiment of a control system for an automatic heating nozzle for a spreading and paving machine, comprising a tank body 1, a conveying pipeline 2, a tank body temperature sensor 11, at least one spraying beam body 3, a nozzle assembly temperature sensor 33 and a control system 4, wherein the tank body 1 is used to store and heat the adhesive material, the conveying pipeline 2 is connected to the tank body 1 at one end and to the spraying beam body 3 at the other end, the tank body temperature sensor 11 is arranged on the tank body 1 and connected to the control system 4, and a heating assembly is also arranged in the tank body 1 and connected to the control system 4, for heating the adhesive material in the tank body 1; The spray beam body 3 includes a spray beam 31 and a nozzle assembly 32, and the nozzle assembly 32 is arranged on the spray beam 31; The nozzle assembly temperature sensor 33 is disposed at the connection between the spray beam 31 and the nozzle assembly 32 and is connected to the control system 4; The nozzle assembly 32 includes a spray pipe 321 , a nozzle 322 and a heating assembly. One end of the spray pipe 321 is fixed on the spray beam 31 , and the other end is connected to the nozzle 322 . The heating assembly is arranged in the spray pipe 321 and the nozzle 322 and connected to the control system 4 .

[0026] In the specific operation process, multiple nozzle assemblies 32 can be provided, but at least one nozzle assembly 32 is required. When the number of nozzle assemblies 32 on a single spraying beam 31 is greater than or equal to 3, at least 3 nozzle assembly temperature sensors 33 are installed on the single spraying beam 31; When the number of nozzle assemblies 32 on a single spraying beam 31 is less than 3, the number of nozzle assembly temperature sensors 33 is equal to the number of nozzle assemblies 32; The nozzle assembly temperature sensors 33 are evenly distributed on the spray beam 31 according to the actual position of the nozzle assembly 32 , and are used to measure the temperature values ​​of different point areas of the spray beam 31 .

[0027] An output terminal 5 connected to the control system is provided, and the signals of each nozzle assembly sensor 33 can be manually set to be shielded. When a nozzle assembly sensor 33 is shielded, when the control system 4 calculates the temperature value of the nozzle assembly 32 of the spray beam 31, the temperature value collected by the nozzle assembly temperature sensor 33 no longer participates in the logical calculation.

[0028] The output end 5 can also assign a value to each nozzle assembly temperature sensor 33 through the control system 4. When a nozzle assembly temperature sensor 33 is assigned a value, the signal values ​​of the remaining nozzle assembly temperature sensors participating in the operation of the control system 4 are all the assigned values, and the temperature values ​​collected and identified by themselves no longer participate in the control and operation.

[0029] The specific operation process of this embodiment is as follows: The tank temperature sensor collects the temperature of the tank and the bonding material in the conveying pipeline, and the nozzle assembly temperature sensor collects the temperature of the nozzle assembly, and at the same time identifies the state of the nozzle assembly heating function, and transmits the monitored temperature signal and state signal to the control system; If the nozzle assembly heating function is turned off, when the nozzle assembly temperature is detected to be lower than the bonding material temperature, and T 喷嘴 ≤T 粘接 -N, turn on the nozzle assembly heating function to heat the nozzle assembly, heat the nozzle assembly, and make the temperature of the nozzle assembly consistent with the temperature of the adhesive material; when the nozzle assembly temperature T 喷嘴 ﹥T 粘接 -N, the nozzle assembly heating function is not turned on; If the nozzle assembly is in the heating state, when the nozzle assembly temperature is higher than the temperature of the bonding material, and T 喷嘴 ﹥T 粘接+F, turn off the nozzle assembly heating function, stop heating the nozzle assembly, and lower the temperature of the nozzle assembly to the same level as the bonding material.

[0030] When it is detected that the temperature of the adhesive material is lower than the set lower limit of the working temperature, the heating component in the tank body 1 is started to heat the adhesive material so that the temperature of the adhesive material reaches the optimal working temperature.

[0031] Although the preferred implementation cases of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention spirit and claims, which all fall within the scope of protection of the present invention.

Claims

1. A control method for an automatic heating nozzle for a spreading paving machine, characterized in that: The following steps are involved: S1 identifies the nozzle heating status; S2 collects the nozzle component temperature signal and the bonding material temperature signal respectively, and identifies the nozzle component temperature T 喷嘴 and bonding material temperature T 粘结 ; S3 sets a first temperature difference N between the nozzle assembly and the adhesive material and a nozzle assembly difference F; S4 compares the collected temperature of the nozzle assembly with the temperature of the bonding material; S5 selects to turn on or off the nozzle heating according to the comparison result between the nozzle assembly temperature and the bonding material temperature.

2. The control method of the automatic heating nozzle for a spreading and paving machine according to claim 1, characterized in that: In the step S1, the nozzle heating state includes a nozzle assembly heating function off state and a nozzle heating state.

3. The control method for the automatic heating nozzle for a spreading and paving machine according to claim 2, characterized in that: In step S2, collecting the temperature signal of the nozzle assembly is specifically as follows: During normal temperature collection, the nozzle component temperature T 喷嘴 The average value of the temperature values ​​collected by the nozzle assembly temperature sensor; When the signal of any one or more nozzle assembly temperature sensors is shielded, when calculating the nozzle assembly temperature value corresponding to the nozzle assembly temperature sensor, the temperature value collected by the nozzle assembly temperature sensor no longer participates in the logic calculation; When a nozzle assembly temperature sensor is assigned a value, the signal values ​​of the remaining nozzle assembly temperature sensors participating in the control system operation are all the assigned values, and the temperature values ​​collected and identified by themselves no longer participate in the control and operation.

4. The control method of the automatic heating nozzle for a spreading and paving machine according to claim 3 is characterized in that: In step S3, the first temperature difference N between the nozzle assembly and the adhesive material is the temperature difference between the nozzle assembly temperature and the adhesive material temperature when the nozzle assembly heating function is turned off, that is, N=T 粘接 -T 喷嘴 , N>0, at this time, the temperature of the nozzle assembly is lower than the temperature of the bonding material; The difference F between the nozzle assembly and the bonding material is the temperature difference between the nozzle assembly temperature and the bonding material temperature when the nozzle is heated, that is, F = T 喷嘴 -T 粘接 , F>0, at this time, the temperature of the nozzle assembly is higher than the temperature of the adhesive material.

5. The control method of the automatic heating nozzle for a spreading and paving machine according to claim 4, characterized in that: In step S5, the control logic for turning on or off the nozzle heating is specifically as follows: When the nozzle heating state is identified as the nozzle component heating function is off, if the nozzle component temperature T 喷嘴 Below the bonding temperature, and T 喷嘴 ≤T 粘接 -N, turn on the nozzle assembly heating function to heat the nozzle assembly; if the nozzle assembly temperature T 喷嘴 ﹥T 粘接 -N, the nozzle assembly heating function is not turned on; When the nozzle heating state is identified as nozzle heating, if the nozzle component temperature T 喷嘴 Higher than the bonding material temperature, and T 喷嘴 ﹥T 粘接 +F turns off the nozzle assembly heating function.

6. The control method of the automatic heating nozzle for a spreading and paving machine according to claim 5, characterized in that: The first temperature difference N is determined according to the stability of the material, and the nozzle assembly difference F is determined according to the material of the nozzle assembly and the power of the heating system.

7. The control method for the automatic heating nozzle for a spreading and paving machine according to any one of claims 1 to 6, characterized in that: Also includes the bonding material temperature T 粘接 The specific steps for monitoring and adjustment are as follows: S6 sets the minimum construction temperature of the bonding material to T 下限 ; If S7 detects the bonding material temperature T 粘接 Lower than the minimum construction temperature T 下限 When the temperature is too low, the bonding material is heated up, and a feedback signal is given to the user. S8 If the temperature value difference between the nozzle assemblies on a single spraying beam exceeds the set accuracy deviation of the temperature sensor, a feedback signal is sent and an alarm message is issued to check the temperature sensor fault information.

8. A control system for an automatic heating nozzle for a spreading and paving machine, used to implement the automatic heating nozzle control method for a spreading and paving machine according to any one of claims 1 to 7, characterized in that: It includes a tank body, a conveying pipeline, a tank body temperature sensor, at least one spray beam body, a nozzle assembly temperature sensor and a control system, wherein the tank body is used to store the bonding material and heat the bonding material; One end of the conveying pipeline is connected to the tank body, and the other end is connected to the spraying beam body, so as to convey the adhesive material in the tank body to the spraying beam body; The tank temperature sensor is arranged on the tank and connected to the control system for real-time monitoring of the temperature of the bonding material in the tank and the conveying pipeline; The tank body is also provided with a heating component, which is connected to the control system and is used to heat the adhesive material in the tank body; The spraying beam body comprises a spraying beam and a nozzle assembly, and the nozzle assembly is arranged on the spraying beam; The nozzle assembly temperature sensor is arranged at the connection between the spray beam and the nozzle assembly and is connected to the control system for real-time monitoring of the nozzle assembly temperature; The nozzle assembly comprises a spray pipe, a nozzle and a heating assembly. One end of the spray pipe is fixed on the spray beam and the other end is connected to the nozzle. The heating assembly is arranged in the spray pipe and the nozzle and connected to the control system for heating the nozzle assembly.

9. The automatic heating nozzle control system for a spreading and paving machine according to claim 8, characterized in that: There is at least one nozzle assembly, and when the number of nozzle assemblies on a single spraying beam is greater than or equal to 3, at least 3 nozzle assembly temperature sensors are installed on the single spraying beam; When the number of nozzle assemblies on a single spraying beam is less than 3, the number of nozzle assembly temperature sensors is equal to the number of nozzle assemblies; The nozzle assembly temperature sensors are evenly distributed on the spray beam according to the actual position of the nozzle assembly, and are used to measure the temperature values ​​of different point areas of the spray beam.

10. The automatic heating nozzle control system for a spreading and paving machine according to claim 9, characterized in that: It also includes an output end, which is connected to the control system and is used to set and shield any nozzle assembly temperature sensor signal, or to assign a value to each nozzle assembly temperature sensor.

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