CN219245987U - High temperature resistant PA6T copolymer vacuum drying controlling means - Google Patents
High temperature resistant PA6T copolymer vacuum drying controlling means Download PDFInfo
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- CN219245987U CN219245987U CN202222020052.8U CN202222020052U CN219245987U CN 219245987 U CN219245987 U CN 219245987U CN 202222020052 U CN202222020052 U CN 202222020052U CN 219245987 U CN219245987 U CN 219245987U
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Abstract
The utility model discloses a high-temperature-resistant PA6T copolymer vacuum drying control device, which comprises a temperature sensor and a controller, wherein the temperature sensor and the controller are arranged in a vacuum dryer, the temperature sensor is an infrared temperature sensor, detection signals of the infrared temperature sensor are sequentially processed in a rotary notch noise reduction amplifying circuit and a waveform improvement regulating circuit and then are sent to the controller, and the controller is used for regulating the drying temperature of the vacuum dryer; according to the utility model, the infrared temperature sensor is used for detecting the drying temperature in the vacuum dryer, so that the problem of low response speed of the platinum-heat type temperature sensor is effectively solved, and the temperature detection is more real-time and accurate; the rotary notch noise reduction amplifying circuit and the waveform improvement regulating circuit are arranged to condition the infrared temperature detection signal, so that the external high-frequency microwave interference is effectively eliminated, and the vacuum drying control device is ensured to accurately and effectively detect the drying temperature.
Description
Technical Field
The utility model relates to the technical field of reaction kettle control, in particular to a high-temperature-resistant PA6T copolymer vacuum drying control device.
Background
Poly (hexamethylene terephthalamide) (PA 6T) is a semi-aromatic polyamide formed by melt polycondensation of 1, 6-hexamethylene diamine and terephthaloyl chloride, and has relatively high crystallinity and high crystallization speed (up to 75% crystallinity), thus having a higher melting point (310 ℃) and a glass transition temperature of 180 ℃, a high heat distortion temperature, and a long-term use temperature (CUT 5000 hours) of 200 ℃. The PA6T has the characteristics that the PA6T has the technical advantages over other engineering plastics such as PA6, PA66, PPA and polyester in terms of heat resistance, mechanical strength at high temperature, wear resistance and the like, and the material has a short molding cycle and is more economical to process. The PA6T copolymer needs to be subjected to microwave vacuum drying to constant weight in the preparation process, and the drying temperature needs to be strictly controlled during the process to ensure the physical properties of the raw materials, but the temperature control is delayed and deviated due to the fact that a large amount of high-frequency microwave interference exists in a heating environment and the response speed of a platinum-heat type temperature sensor is low, so that the vacuum drying of the raw materials cannot be ensured to reach the optimal state.
The present utility model provides a new solution to this problem.
Disclosure of Invention
In view of the above, in order to overcome the defects in the prior art, the present utility model is directed to a high temperature resistant PA6T copolymer vacuum drying control device.
The technical scheme for solving the problems is as follows: the utility model provides a high temperature resistant PA6T copolymer vacuum drying controlling means, includes temperature sensor and the controller of setting in the vacuum dryer, temperature sensor selects infrared temperature sensor, infrared temperature sensor's detected signal is in proper order through gyration notch noise reduction amplifier circuit and wave form improvement adjusting circuit in handle the back send to in the controller, the controller is used for adjusting the drying temperature of vacuum dryer.
Preferably, the rotary notch noise reduction amplifying circuit includes an inductor L1, one end of the inductor L1 is connected with the signal output end of the infrared temperature sensor, and is grounded through a parallel resistor R1 and a capacitor C1, the other end of the inductor L1 is grounded through a capacitor C2, and is connected with the inverting input end and the non-inverting input end of the operational amplifier U1 through resistors R2 and R3 respectively, the non-inverting input end of the operational amplifier U1 is connected with the non-inverting input end of the operational amplifier U2 and one end of a resistor R5 through a capacitor C3, the inverting input end and the output end of the operational amplifier U2 are connected with the other end of the resistor R5 through a capacitor C4, and the inverting input end of the operational amplifier U1 is connected with the output end of the operational amplifier U1 and the input end of the waveform improvement regulating circuit through a resistor R4.
Preferably, the waveform improving and adjusting circuit includes an operational amplifier U3, an inverting input end of the operational amplifier U3 is connected with one end of an inductor L1 and a sliding end of a varistor RP1 through a capacitor C5, the other end of the inductor L2 is connected with an output end of the operational amplifier U1, the other end of the varistor RP1 is connected with an output end of the operational amplifier U3, an non-inverting input end of the operational amplifier U3 is connected with one end of the capacitor C6 through a resistor R6, the other end of the capacitor C6 is grounded, and an output end of the operational amplifier U3 is connected with the controller and is grounded through one end of a capacitor C7 of a resistor R7, and the other end of the capacitor C7 is grounded.
Preferably, the controller is a PLC control module.
Through the technical scheme, the utility model has the beneficial effects that:
1. according to the utility model, the infrared temperature sensor is used for detecting the drying temperature in the vacuum dryer, so that the problem of low response speed of the platinum-heat type temperature sensor is effectively solved, and the temperature detection is more real-time and accurate;
2. the rotary notch noise reduction amplifying circuit and the waveform improvement regulating circuit are arranged to condition the infrared temperature detection signal, so that the external high-frequency microwave interference is effectively eliminated, and the vacuum drying control device is ensured to accurately and effectively detect the drying temperature.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying fig. 1. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The utility model provides a high temperature resistant PA6T copolymer vacuum drying controlling means, includes temperature sensor and the controller of setting in the vacuum drier, and temperature sensor selects infrared temperature sensor J1 to use, because infrared temperature sensor adopts the infrared radiation thermal effect principle, has transient response's characteristics, consequently can effectively solve the low problem of platinum fever type temperature sensor response speed, makes temperature detection more accurate in real time.
In order to avoid interference of external high-frequency clutter on infrared temperature detection signals, detection signals of an infrared temperature sensor J1 are sequentially processed in a rotary notch noise reduction amplifying circuit and a waveform improvement adjusting circuit and then sent to the controller, and the controller is used for adjusting the drying temperature of the vacuum dryer.
The rotary notch noise reduction amplifying circuit comprises an inductor L1, one end of the inductor L1 is connected with a signal output end of the infrared temperature sensor J1 and is grounded through a resistor R1 connected in parallel with a capacitor C1, the other end of the inductor L1 is grounded through a capacitor C2 and is respectively connected with an inverting input end and an non-inverting input end of the operational amplifier U1 through resistors R2 and R3, the non-inverting input end of the operational amplifier U1 is connected with the non-inverting input end of the operational amplifier U2 and one end of a resistor R5 through a capacitor C3, the inverting input end and the output end of the operational amplifier U2 are connected with the other end of the resistor R5 through a capacitor C4, and the inverting input end of the operational amplifier U1 is connected with the output end of the operational amplifier U1 and the input end of the waveform improvement regulating circuit through a resistor R4.
The waveform improvement regulating circuit comprises an operational amplifier U3, wherein an inverting input end of the operational amplifier U3 is connected with one end of an inductor L1 and a sliding end of a rheostat RP1 through a capacitor C5, the other end of the inductor L2 is connected with an output end of the operational amplifier U1, the other end of the rheostat RP1 is connected with an output end of the operational amplifier U3, an in-phase input end of the operational amplifier U3 is connected with one end of a capacitor C6 through a resistor R6, the other end of the capacitor C6 is grounded, and an output end of the operational amplifier U3 is connected with the controller and is grounded through one end of a capacitor C7 of a resistor R7, and the other end of the capacitor C7 is grounded.
When the utility model is specifically used, the infrared temperature sensor J1 detects the drying temperature in the vacuum dryer and converts the drying temperature into an electric signal to be output, the rotary notch noise reduction amplifying circuit firstly processes infrared temperature detection signals, wherein a low-pass filter network consisting of the capacitors C1, C2, the resistor R1 and the inductor L1 filters external peak noise, clutter interference is primarily reduced, then the noise is sent into the operational amplifier U1 to be amplified, in the operational amplifier process, the operational amplifier U2 forms a gyrator at the non-inverting input end of the operational amplifier U1, and a notch network formed by the resistors R3, R5 and the capacitors C3 and C4 filters microwave interference frequency generated in the working process of the vacuum dryer, so that the detection signal precision is greatly improved.
The waveform improvement regulating circuit further regulates the output signal of the operational amplifier U1, wherein the inductor L2 carries out alternating current inhibition on the output signal of the operational amplifier U1 and then sends the output signal to the operational amplifier U3 for secondary amplification, the capacitor C5 plays a role in signal compensation at the feedback end of the operational amplifier U3, the stability of the output waveform of the detection signal is improved, the resistance value of the rheostat RP1 is regulated to change the amplitude range of the output signal of the operational amplifier U3, thereby ensuring that the output of the infrared temperature detection signal accords with the standard receiving range of the controller, and the capacitors C6 and C7 have the effect of eliminating thermal noise and ensure that the output of the detection signal is more stable and accurate.
When the device is specifically arranged, the controller selects the PLC control module, and the PLC control module carries out internal calculation after carrying out A/D conversion on the infrared temperature detection signal, so that the real-time drying temperature in the vacuum dryer is obtained, the raw material drying temperature is always in the optimal state through adjusting the working heating power of the vacuum dryer, and the raw material drying effect is improved.
In summary, the infrared temperature sensor is adopted to detect the drying temperature in the vacuum dryer, so that the problem of low response speed of the platinum-heat type temperature sensor is effectively solved, and the temperature detection is more real-time and accurate; and a rotary notch noise reduction amplifying circuit and a waveform improvement regulating circuit are arranged to condition the infrared temperature detection signal, so that the external high-frequency microwave interference is effectively eliminated, and the vacuum drying control device is ensured to accurately and effectively detect the drying temperature.
While the utility model has been described in connection with certain embodiments, it is not intended that the utility model be limited thereto; for those skilled in the art to which the present utility model pertains and the related art, on the premise of based on the technical scheme of the present utility model, the expansion, the operation method and the data replacement should all fall within the protection scope of the present utility model.
Claims (2)
1. The utility model provides a high temperature resistant PA6T copolymer vacuum drying controlling means, includes temperature sensor and the controller that sets up in the vacuum dryer, its characterized in that: the temperature sensor is an infrared temperature sensor, detection signals of the infrared temperature sensor are sequentially processed in the rotary notch noise reduction amplifying circuit and the waveform improvement regulating circuit and then are sent to the controller, and the controller is used for regulating the drying temperature of the vacuum dryer;
the rotary notch noise reduction amplifying circuit comprises an inductor L1, one end of the inductor L1 is connected with a signal output end of the infrared temperature sensor and is grounded through a resistor R1 connected in parallel with a capacitor C1, the other end of the inductor L1 is grounded through a capacitor C2 and is respectively connected with an inverting input end and a non-inverting input end of an operational amplifier U1 through resistors R2 and R3, the non-inverting input end of the operational amplifier U1 is connected with the non-inverting input end of the operational amplifier U2 and one end of a resistor R5 through a capacitor C3, the inverting input end and the output end of the operational amplifier U2 are connected with the other end of a resistor R5 through a capacitor C4, and the inverting input end of the operational amplifier U1 is connected with the output end of the operational amplifier U1 and the input end of the waveform improvement regulating circuit through a resistor R4;
the waveform improvement regulating circuit comprises an operational amplifier U3, wherein an inverting input end of the operational amplifier U3 is connected with one end of an inductor L1 and a sliding end of a rheostat RP1 through a capacitor C5, the other end of the inductor L2 is connected with an output end of the operational amplifier U1, the other end of the rheostat RP1 is connected with an output end of the operational amplifier U3, an in-phase input end of the operational amplifier U3 is connected with one end of a capacitor C6 through a resistor R6, the other end of the capacitor C6 is grounded, and an output end of the operational amplifier U3 is connected with the controller and is grounded through one end of a capacitor C7 of a resistor R7, and the other end of the capacitor C7 is grounded.
2. The high temperature resistant PA6T copolymer vacuum drying control apparatus according to claim 1, wherein: the controller is a PLC control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222020052.8U CN219245987U (en) | 2022-08-02 | 2022-08-02 | High temperature resistant PA6T copolymer vacuum drying controlling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222020052.8U CN219245987U (en) | 2022-08-02 | 2022-08-02 | High temperature resistant PA6T copolymer vacuum drying controlling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219245987U true CN219245987U (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222020052.8U Active CN219245987U (en) | 2022-08-02 | 2022-08-02 | High temperature resistant PA6T copolymer vacuum drying controlling means |
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| CN (1) | CN219245987U (en) |
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- 2022-08-02 CN CN202222020052.8U patent/CN219245987U/en active Active
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