CN210850912U - Novel low-speed powder blendor - Google Patents
Novel low-speed powder blendor Download PDFInfo
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- CN210850912U CN210850912U CN201921498358.6U CN201921498358U CN210850912U CN 210850912 U CN210850912 U CN 210850912U CN 201921498358 U CN201921498358 U CN 201921498358U CN 210850912 U CN210850912 U CN 210850912U
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Abstract
The utility model discloses a novel low-speed powder blendor, including powder unloading subassembly, the reinforced subassembly of modifier, temperature monitoring subassembly and blending bunker, the temperature monitoring subassembly is including setting up the temperature sensor at the top in the blending bunker, and temperature sensor's output signal is sent into in the controller after handling through the signal amplification circuit, filter circuit and the fortune that connect gradually, the utility model discloses an infrared temperature sensor measures powder surface temperature to effectively improve the degree of accuracy that temperature detected after handling through the temperature monitoring subassembly, make the control effect of controller more accurate effective, and install whole seal good, can effectively prevent the pollution of raise dust, degree of automation is high, has fine practical value.
Description
Technical Field
The utility model relates to a powder mixing apparatus technical field especially relates to a novel low-speed powder blendor.
Background
The plastic products are often required to be blended and modified in the production process, namely two or more than two different polymer powders are mixed, necessary various modifiers can be added into the powder in the mixing process to modify the powder, and the temperature of the powder is controlled at the same time, so that the performance of the powder is improved. In the prior art, a thermocouple or a thermistor type temperature sensor is usually adopted to detect the temperature of the mixed powder, a detection signal is sent to a PLC, and the PLC controls the adding time and the discharging time of the modifier. Because the temperature sensor is arranged at the top of the mixing bin, the temperature of the powder can be indirectly determined only by measuring the temperature of the top space of the bin, and the modifier also has certain corrosivity, so that dirt is formed on the binding post, even a thermal resistor is short-circuited, the deviation between a temperature detection value and an actual value is large, and the PLC automatic control effect is greatly reduced.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a novel low-speed powder mixer.
The technical scheme for solving the problem is as follows: a novel low-speed powder mixer comprises a powder blanking assembly, a modifier feeding assembly, a temperature monitoring assembly and a mixing bin, wherein the powder blanking assembly comprises a powder bin, the powder bin is connected with a first feeding hole of the mixing bin through a conveying device, and a discharging hole of the powder bin is provided with a blanking control valve; the modifier feeding assembly comprises a charging barrel filled with a modifier, the charging barrel is connected with a second feeding hole of the mixing bin, and a discharging hole of the charging barrel is provided with an electromagnetic nozzle; the temperature monitoring assembly comprises a temperature sensor arranged at the top in the mixing bin, an output signal of the temperature sensor is processed by a signal amplification circuit, a filter circuit and an operational amplifier compensation circuit which are sequentially connected and then sent into a controller, and the controller is used for controlling the work of the blanking control valve and the work of the electromagnetic spray head.
Preferably, the signal amplifying circuit includes operational amplifiers AR1 and AR2, an inverting input terminal of the operational amplifier AR1 is connected to one ends of the resistors R1 and C1 through a resistor R2, the other end of the resistor R1 is connected to the pin 1 of the temperature sensor, a non-inverting input terminal of the operational amplifier AR1 is connected to the other end of the capacitor C1 and the pin 2 of the temperature sensor and is grounded through a resistor R4, the inverting input terminal of the operational amplifier AR1 is further connected to an output terminal thereof through a resistor R3, an output terminal of the operational amplifier AR1 is connected to an inverting input terminal of the operational amplifier AR2 through a resistor R5, the non-inverting input terminal of the operational amplifier AR1 is connected to one ends of the resistors R6, R7 and the capacitor C2, the other ends of the resistors R7 and the capacitor C2 are grounded, and the other end of the resistor R7 is.
Preferably, the filter circuit comprises a capacitor C3 and an inductor L1, one end of the capacitor C3 and one end of the inductor L1 are connected with the output end of the operational amplifier AR2 through a resistor R8, and the other end of the capacitor C3 and the other end of the inductor L1 are grounded.
Preferably, the operational amplifier compensation circuit includes an operational amplifier AR3, an inverting input terminal of the operational amplifier AR3 is connected to one ends of capacitors C3, C4 and a resistor R9, a non-inverting input terminal of the operational amplifier AR3 is grounded, an output terminal of the operational amplifier AR3 is connected to the other end of the capacitor C4 and one end of the resistor R10, and the other ends of the resistors R9 and R10 are connected to an input terminal of the controller and are grounded through a capacitor C5.
Preferably, a bag-type dust collector is arranged at the top of the powder bin.
Preferably, the conveying device is a weighing screw conveyor.
Preferably, a stirrer is arranged in the mixing bin, and a feed opening is formed in the bottom of the mixing bin.
Preferably, the temperature sensor is an infrared temperature sensor.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model adopts the infrared temperature sensor to measure the surface temperature of the powder, and effectively improves the accuracy of temperature detection after the temperature monitoring component is processed, so that the control effect of the controller is more accurate and effective, the whole tightness of the device is good, the powder dust pollution can be effectively prevented, the automation degree is high, and the device has good practical value;
2. the filter circuit adopts an LC filter principle to carry out frequency-selective filtering on the output signal of the operational amplifier AR1, so that the accuracy of temperature detection is greatly improved, and then the operational amplifier compensation circuit carries out harmonic interference elimination on the output signal of the filter circuit, so that the stability of the temperature detection signal is greatly improved;
3. the conveying device adopts the weighing screw conveyor, so that the low-speed stable conveying can be met, and the accuracy of the feeding quantity can be ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the temperature monitoring assembly of the present invention.
In the figure: 1-a powder bin, 2-a charging bucket, 3-a mixing bin, 4-a bag-type dust remover, 5-a weighing screw conveyer, 6-a discharging control valve, 7-an electromagnetic spray head, 8-a temperature monitoring component, 9-a stirrer and 10-a discharging port.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in figure 1, the novel low-speed powder mixer comprises a powder blanking assembly, a modifier feeding assembly, a temperature monitoring assembly 8 and a mixing bin 3. The powder unloading subassembly includes powder storehouse 1, and powder storehouse 1 passes through conveyor and connects the first feed inlet of blending bunker 3, and the discharge gate of powder storehouse 1 is provided with unloading control valve 6. The modifier feeding assembly comprises a charging bucket 2 filled with a modifier, the charging bucket 2 is connected with a second feeding hole of the mixing bin 3, and a discharging hole of the charging bucket 2 is provided with an electromagnetic nozzle 7. When specifically setting up, the top of powder storehouse 1 sets up sack cleaner 4, prevents that the powder from splashing and causing the pollution. The conveying device adopts the weighing screw conveyor 5, so that the low-speed stable conveying can be met, and the accuracy of the feeding amount can be ensured. A stirrer 9 is arranged in the mixing bin 3, and a feed opening 10 is arranged at the bottom.
Temperature monitoring subassembly 8 is including setting up the temperature sensor at the internal top of blending bunker 3, and in order to guarantee the degree of accuracy that the temperature detected, infrared temperature sensor J1 is chooseed for use to temperature sensor, forms the reflection through transmission infrared light to powder surface to acquire powder surface temperature value. The output signal of the temperature sensor is processed by a signal amplifying circuit, a filter circuit and an operational amplifier compensation circuit which are connected in sequence and then sent into a controller, and the controller is used for controlling the work of a blanking control valve 6 and an electromagnetic spray head 7.
As shown in fig. 2, first, two output signals of the infrared temperature sensor J1 are sent to the signal amplification circuit for amplification, so as to improve the signal strength. The signal amplifying circuit comprises operational amplifiers AR1 and AR2, wherein the inverting input end of an operational amplifier AR1 is connected with one ends of a resistor R1 and a capacitor C1 through a resistor R2, the other end of the resistor R1 is connected with a pin 1 of a temperature sensor, the non-inverting input end of an operational amplifier AR1 is connected with the other end of a capacitor C1 and a pin 2 of the temperature sensor and is grounded through a resistor R4, the inverting input end of the operational amplifier AR1 is also connected with the output end of the operational amplifier AR 3684, the output end of the operational amplifier AR1 is connected with the inverting input end of an operational amplifier AR2 through a resistor R5, the non-inverting input end of the operational amplifier AR1 is connected with one ends of resistors R6 and R7 and a capacitor C2, the other ends of the resistor R7 and the capacitor C2 are grounded, and the other end. Wherein, the operational amplifier AR1 utilizes the differential amplification principle to amplify two way signals of infrared temperature sensor J1, effectively avoids external noise signal interference, improves the amplification accuracy of temperature detect signal. Then, the output signal of the operational amplifier AR1 is sent to the operational amplifier AR2 for secondary amplification, and the resistor R7 and the capacitor C2 form an RC filter in the amplification feedback process of the operational amplifier AR2, so that stable output of the temperature detection signal is ensured.
Since the output signal of the infrared temperature sensor J1 has a fixed frequency, in order to avoid the noise frequency signal interfering with the temperature detection signal, the output signal of the operational amplifier AR2 is further filtered by using a filter circuit. The filter circuit comprises a capacitor C3 and an inductor L1, one end of the capacitor C3 and one end of the inductor L1 are connected with the output end of the operational amplifier AR2 through a resistor R8, and the other end of the capacitor C3 and the other end of the inductor L1 are grounded. The capacitor C3 and the inductor L1 form an LC filter to perform frequency-selective filtering on the output signal of the operational amplifier AR1, that is, only the frequency of the output signal of the infrared temperature sensor J1 is allowed to pass, so that the accuracy of temperature detection is greatly improved.
Because the LC filter can generate resonance to influence the stability of signal output, the output signal of the filter circuit is stabilized by adopting the operational amplifier compensation circuit. The operational amplifier compensation circuit comprises an operational amplifier AR3, wherein the inverting input end of the operational amplifier AR3 is connected with one end of capacitors C3, C4 and a resistor R9, the non-inverting input end of the operational amplifier AR3 is grounded, the output end of the operational amplifier AR3 is connected with the other end of the capacitor C4 and one end of the resistor R10, and the other ends of the resistors R9 and R10 are connected with the input end of a controller and are grounded through a capacitor C5. The capacitor C4 plays a role in signal compensation, and the resistor R9 plays a role in signal attenuation compensation, so that the stability of the output signal of the operational amplifier AR3 is improved.
The utility model discloses when specifically using, controller control unloading control valve 6 is opened and is made the powder get into screw conveyer 5 of weighing, and screw conveyer 5 of weighing adds the powder of fixed quantity in to blending bunker 3 according to setting for the addition, then 9 beginning work of controller control mixer. In the process, the infrared temperature sensor J1 detects the temperature of the powder in real time, the detection signal is processed by the temperature monitoring assembly 8, the accuracy of temperature detection is improved, and the controller calculates the actual temperature value according to the received temperature detection signal potential value. When the temperature of the powder reaches a first set value, the controller controls the electromagnetic nozzle 7 to add corresponding modifier according to the quantity of the powder, and the powder is fully mixed by the stirrer 9; when the temperature of the powder reaches a second set value, the controller controls the stirrer 9 to stop working, and the powder mixing is completed. The specific parameters of the first set value and the second set value are set according to the actual production process requirements, and the control process of the controller is mature prior art, and is not detailed herein.
To sum up, the utility model discloses an infrared temperature sensor J1 measures powder surface temperature to effectively improve the degree of accuracy that the temperature detected after handling through temperature monitoring subassembly 8, make the control effect of controller more accurate effective, and install whole seal good, can effectively prevent the powder raise dust pollution, degree of automation is high, has fine practical value.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (8)
1. The utility model provides a novel low-speed powder blendor, includes powder unloading subassembly, the reinforced subassembly of modifier, temperature monitoring subassembly and blending bunker, its characterized in that: the powder blanking assembly comprises a powder bin, the powder bin is connected with a first feeding hole of the mixing bin through a conveying device, and a discharging hole of the powder bin is provided with a blanking control valve; the modifier feeding assembly comprises a charging barrel filled with a modifier, the charging barrel is connected with a second feeding hole of the mixing bin, and a discharging hole of the charging barrel is provided with an electromagnetic nozzle; the temperature monitoring assembly comprises a temperature sensor arranged at the top in the mixing bin, an output signal of the temperature sensor is processed by a signal amplification circuit, a filter circuit and an operational amplifier compensation circuit which are sequentially connected and then sent into a controller, and the controller is used for controlling the work of the blanking control valve and the work of the electromagnetic spray head.
2. The novel low-speed powder mixer as claimed in claim 1, wherein: the signal amplifying circuit comprises operational amplifiers AR1 and AR2, wherein the inverting input end of an operational amplifier AR1 is connected with one ends of a resistor R1 and a capacitor C1 through a resistor R2, the other end of the resistor R1 is connected with a pin 1 of a temperature sensor, the non-inverting input end of the operational amplifier AR1 is connected with the other end of a capacitor C1 and a pin 2 of the temperature sensor and is grounded through a resistor R4, the inverting input end of the operational amplifier AR1 is also connected with the output end of the operational amplifier AR 3684, the output end of the operational amplifier AR1 is connected with the inverting input end of an operational amplifier AR2 through a resistor R5, the non-inverting input end of the operational amplifier AR1 is connected with one ends of resistors R6 and R7 and a capacitor C2, the other ends of the resistor R7 and the capacitor C2 are grounded, and the other end of the resistor R.
3. The novel low-speed powder mixer as claimed in claim 2, wherein: the filter circuit comprises a capacitor C3 and an inductor L1, one end of the capacitor C3 and one end of the inductor L1 are connected with the output end of the operational amplifier AR2 through a resistor R8, and the other end of the capacitor C3 and the other end of the inductor L1 are grounded.
4. The novel low-speed powder mixer as claimed in claim 3, characterized in that: the operational amplifier compensation circuit comprises an operational amplifier AR3, wherein an inverting input end of the operational amplifier AR3 is connected with one ends of capacitors C3, C4 and a resistor R9, a non-inverting input end of the operational amplifier AR3 is grounded, an output end of the operational amplifier AR3 is connected with the other end of the capacitor C4 and one end of the resistor R10, and the other ends of the resistors R9 and R10 are connected with an input end of a controller and are grounded through a capacitor C5.
5. The novel low-speed powder mixer as claimed in claim 1, wherein: and a bag-type dust collector is arranged at the top of the powder bin.
6. The novel low-speed powder mixer as claimed in claim 1, wherein: the conveying device is a weighing screw conveyor.
7. The novel low-speed powder mixer as claimed in claim 1, wherein: a stirrer is arranged in the mixing bin, and a feed opening is formed in the bottom of the mixing bin.
8. The novel low-speed powder mixer as claimed in claim 1, wherein: the temperature sensor is an infrared temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921498358.6U CN210850912U (en) | 2019-09-10 | 2019-09-10 | Novel low-speed powder blendor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921498358.6U CN210850912U (en) | 2019-09-10 | 2019-09-10 | Novel low-speed powder blendor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210850912U true CN210850912U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921498358.6U Active CN210850912U (en) | 2019-09-10 | 2019-09-10 | Novel low-speed powder blendor |
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| Country | Link |
|---|---|
| CN (1) | CN210850912U (en) |
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2019
- 2019-09-10 CN CN201921498358.6U patent/CN210850912U/en active Active
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