CN210969415U - Energy-saving cement feed metering device - Google Patents
Energy-saving cement feed metering device Download PDFInfo
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- CN210969415U CN210969415U CN201921381285.2U CN201921381285U CN210969415U CN 210969415 U CN210969415 U CN 210969415U CN 201921381285 U CN201921381285 U CN 201921381285U CN 210969415 U CN210969415 U CN 210969415U
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Abstract
The utility model discloses an energy-saving cement feed metering device, including feeding machine and conveying mechanism, the feed opening of feeding machine sets up the unloading control valve, conveying mechanism chooses weighing screw conveyer for use, weighing screw conveyer includes weighing sensor, weighing sensor's signal output part connects metering signal processing module's input, metering signal processing module is including the filter circuit who connects gradually, adjustable amplifier circuit and feedback output circuit, the unloading speed of unloading control valve is controlled according to received metering signal size to the controller, make the feeding volume of weighing screw conveyer in the unit interval be in dynamic balance all the time, the feed is even, whole process automation degree is high, control effect is accurate reliable, make the material obtain abundant rational utilization, improve the production quality of energy-saving cement.
Description
Technical Field
The utility model relates to a feed measurement technical field especially relates to an energy-saving cement feed metering device.
Background
China is a large country for producing and consuming cement, and the yield of the cement is the first place of the world stably in recent years. The environmental impact of the cement industry is mainly dust and exhaust pollution, so clean production of cement is an important development direction in the cement production process. Many energy-saving cements appear in the existing market, can effectively improve the utilization efficiency of resources and energy, reduce or avoid the pollutant to produce, reduce greenhouse gas's emission, however in the cement production process, the buggy ash measurement adopts feeding machine and band conveyer mechanism's combination to carry out the feed measurement usually, and the buggy ash often arouses the phenomenon that the unloading is not unobstructed or the material that sticks together greatly to unload because of the powder adhesion at the unloading in-process, cause the buggy ash feed inhomogeneous in the unit interval, not only influence the production quality of cement, but also lead to the material can not make full use of rationally, cause the production waste.
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 an energy-saving cement feeding metering device.
The technical scheme for solving the problem is as follows: the utility model provides an energy-saving cement feed metering device, includes feeder and conveying mechanism, the feed opening of feeder sets up the unloading control valve, conveying mechanism is weighing screw conveyer, weighing screw conveyer includes weighing sensor, weighing sensor's signal output part connects metering signal processing module, metering signal processing module is including the filter circuit, adjustable amplifier circuit and the feedback output circuit that connect gradually, metering signal processing module's output connection director's metering signal input part, the output of controller is connected the control end of unloading control valve.
Furthermore, the filter circuit comprises resistors R1 and R2 and capacitors C1 and C2, one end of the resistor R1 is connected with one ends of the resistor R2 and the capacitor C1 and a signal output end of the weighing sensor, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected with one end of the capacitor C2, and the other ends of the capacitors C1 and C2 are grounded in parallel.
Further, the adjustable amplifying circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of a capacitor C2 through a resistor R3, an inverting input terminal of the operational amplifier AR1 is connected with one end of a resistor R4 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R4 is grounded, an output terminal of the operational amplifier AR1 is connected with pins 2 and 3 of an adjustable resistor RP1 and a gate of a MOS transistor Q1, a drain of the MOS transistor Q1 is connected with a +12V power supply, a source of the MOS transistor Q1 is connected with one ends of the resistor R6 and the capacitor C3 through a resistor R5, and the other ends of the resistor R6 and the capacitor C3 are grounded.
Further, the feedback output circuit comprises an operational amplifier AR2, wherein a non-inverting input terminal of the operational amplifier AR2 is connected to one ends of capacitors C3 and C4 and one end of a resistor R7, an inverting input terminal of the operational amplifier AR2 is grounded through a resistor R8, and an output terminal of the operational amplifier AR2 is connected to the other ends of the resistor R7 and the capacitor C4 and a metering signal input terminal of the controller and is grounded through a zener diode DZ 1.
Further, the controller adopts a P L C control system.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model adopts the weighing screw conveyer to convey the material in the feeder, the weighing sensor in the weighing screw conveyer detects the weight of the material on the weighing screw conveyer in real time and sends the detection signal into the metering signal processing module for processing, the controller controls the blanking speed of the blanking control valve according to the received metering signal, so that the feeding amount of the weighing screw conveyer in unit time is always in dynamic balance, and the feeding is uniform;
2. the filter circuit carries out filtering processing on output signals of the symmetrical retransmission sensor by utilizing a pi-type RC filtering principle, so that high-frequency clutter interference caused by the fact that large materials impact the weighing spiral conveyor is effectively eliminated, and the stability of signal detection is improved;
3. in order to adapt to the adjustment quantity in the production process, an adjustable amplifying circuit is designed to process the output signal of the filter circuit, and finally, the feedback output circuit utilizes the in-phase closed-loop feedback adjustment principle, so that the continuous stability of the control process is effectively ensured, the system deviation is eliminated, and the control accuracy of the controller is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a control schematic diagram of the present invention.
Fig. 3 is a schematic circuit diagram of the weighing sensor and the metering signal processing module of the present invention.
Wherein: 1-feeding machine, 2-blanking control valve and 3-weighing screw conveyer.
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 3. 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 the figures 1 and 2, the energy-saving cement feeding metering device comprises a feeder 1 and a conveying mechanism, a feeding port of the feeder 1 is provided with a feeding control valve 2, the conveying mechanism selects a weighing screw conveyor 3, the weighing screw conveyor 3 comprises a weighing sensor J1, a signal output end of the weighing sensor J1 is connected with an input end of a metering signal processing module, the metering signal processing module comprises a filter circuit, an adjustable amplifying circuit and a feedback output circuit which are sequentially connected, an output end of the metering signal processing module is connected with a metering signal input end of a controller, and an output end of the controller is connected with a control end of the feeding control valve 2.
The weighing sensor J1 detects the weight of the material on the weighing screw conveyor 3 in real time and converts the weight of the material into an electric signal which is in direct proportion to the weight of the material to be output. In order to avoid interference caused by the fact that materials impact the weighing screw conveyor 3 and the weighing sensor J1 in the blanking process, output signals of the weighing sensor J1 of the filter circuit are used for processing. As shown in fig. 3, the filter circuit includes resistors R1 and R2 and capacitors C1 and C2, one end of the resistor R1 is connected to one end of the resistor R2 and one end of the capacitor C1, and a signal output end of the load cell J1, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to one end of the capacitor C2, and the other ends of the capacitors C1 and C2 are grounded in parallel. The capacitors C1, C2 and the resistor R2 form pi-type RC filter to filter the output signal of the symmetrical retransmission sensor J1, so that the high-frequency clutter interference caused by the impact of large materials on the weighing spiral conveyor 3 can be effectively eliminated, and the stability of signal detection is improved.
In the production process of the energy-saving cement, the feeding amount of the pulverized coal ash in unit time is often adjusted due to the improvement of the production process, and in order to adapt to the adjustment amount in the production process, an adjustable amplifying circuit is designed to process an output signal of a filter circuit. The adjustable amplifying circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with one end of a capacitor C2 through a resistor R3, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R4 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R4 is grounded, the output end of the operational amplifier AR1 is connected with pins 2 and 3 of an adjustable resistor RP1 and the grid electrode of an MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with a +12V power supply, the source electrode of the MOS tube Q1 is connected with one ends of a resistor R6 and a capacitor C3 through a resistor R5, and the other ends of the resistor R6 and the capacitor C.
The op amp AR1 first amplifies the output signal of the filter circuit rapidly using the in-phase scaling principle. According to the operational amplification principle, the resistance value of the rheostat RP1 is adjusted to change the amplification coefficient of the operational amplifier AR1, when the feeding amount of the coal dust in unit time needs to be adjusted, for example, when the feeding amount of the coal dust needs to be increased, the resistance value of the rheostat RP1 needs to be reduced, so that the output signal of the operational amplifier AR1 is reduced when the resistance value of the rheostat RP1 of the material with the same weight is reduced, the controller controls the blanking speed of the blanking control valve 2 to be increased when the metering signal is reduced, the purpose of increasing the feeding amount of the coal dust is achieved, the specific adjustment value of the rheostat RP1 is calculated according to actual production requirements, and detailed description is omitted. In addition, the output signal of the operational amplifier AR1 is sent to the MOS transistor Q1 for further amplification, so as to improve the signal waveform, and the output signal of the MOS transistor Q1 is sent to the feedback output circuit after being filtered by the resistor voltage division and the capacitor C3.
The feedback output circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with one ends of capacitors C3 and C4 and one end of a resistor R7, the inverting input end of the operational amplifier AR2 is grounded through a resistor R8, and the output end of the operational amplifier AR2 is connected with the other ends of the resistor R7 and the capacitor C4 and the metering signal input end of the controller and is grounded through a voltage stabilizing diode DZ 1. The capacitor C4 and the resistor R7 form forward closed loop compensation at the feedback end of the operational amplifier AR2, so that the continuous stability of the control process is ensured, the system deviation is eliminated, and the control accuracy of the controller is effectively improved.
To sum up, the utility model discloses a weighing screw conveyer 3 comes to carry the material in the feeding machine 1, and weighing sensor J1 real-time detection in the weighing screw conveyer 3 weighs the material weight on the screw conveyer 3 to send detected signal into and handle in the measurement signal processing module. The filter circuit utilizes the pi-type RC filter principle to filter the output signal of the weighing sensor J1, so that the high-frequency clutter interference caused by the impact of large materials on the weighing spiral conveyor 3 is effectively eliminated, and the stability of signal detection is improved. In order to adapt to the adjustment quantity in the production process, an adjustable amplifying circuit is designed to process the output signal of the filter circuit, and finally, the feedback output circuit utilizes the in-phase closed-loop feedback adjustment principle, so that the continuous stability of the control process is effectively ensured, the system deviation is eliminated, and the control accuracy of the controller is effectively improved. When the feeding of the pulverized coal ash is not uniform in unit time, the controller controls the feeding speed of the feeding control valve 2 according to the received measuring signal, so that the feeding amount of the weighing screw conveyor 3 in unit time is always in dynamic balance, and the feeding is uniform. The whole process has high automation degree and accurate and reliable control effect, so that the materials are fully and reasonably utilized, and the production quality of the energy-saving cement is improved.
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 (5)
1. The utility model provides an energy-saving cement feed metering device, includes feeder and conveying mechanism, its characterized in that: the feed opening of feeding machine sets up the unloading control valve, conveying mechanism is weighing screw conveyer, weighing screw conveyer includes weighing sensor, weighing sensor's signal output part connects the metering signal processing module, the metering signal processing module is including the filter circuit, adjustable amplifier circuit and the feedback output circuit who connect gradually, the metering signal input of metering signal processing module's output connection controller, the output of controller is connected the control end of unloading control valve.
2. An energy-saving cement feed metering device as in claim 1, characterized in that: the filter circuit comprises resistors R1 and R2 and capacitors C1 and C2, one end of the resistor R1 is connected with one ends of the resistor R2 and the capacitor C1 and a signal output end of the weighing sensor, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected with one end of the capacitor C2, and the other ends of the capacitors C1 and C2 are grounded in parallel.
3. An energy-saving cement feed metering device as in claim 2, characterized in that: the adjustable amplifying circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with one end of a capacitor C2 through a resistor R3, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R4 and a pin 1 of an adjustable resistor RP1, the other end of the resistor R4 is grounded, the output end of the operational amplifier AR1 is connected with pins 2 and 3 of an adjustable resistor RP1 and the grid electrode of an MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with a +12V power supply, the source electrode of the MOS tube Q1 is connected with one ends of a resistor R6 and a capacitor C3 through a resistor R5, and the other ends of the resistor R6 and the capacitor C596.
4. An energy-saving cement feed metering device as in claim 3, characterized in that: the feedback output circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with one ends of capacitors C3 and C4 and one end of a resistor R7, the inverting input end of the operational amplifier AR2 is grounded through a resistor R8, and the output end of the operational amplifier AR2 is connected with the other ends of the resistor R7 and the capacitor C4 and the metering signal input end of the controller and is grounded through a voltage stabilizing diode DZ 1.
5. An energy-saving cement feeding metering device as claimed in any one of claims 1-4, wherein the controller adopts a P L C control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381285.2U CN210969415U (en) | 2019-08-23 | 2019-08-23 | Energy-saving cement feed metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381285.2U CN210969415U (en) | 2019-08-23 | 2019-08-23 | Energy-saving cement feed metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210969415U true CN210969415U (en) | 2020-07-10 |
Family
ID=71459028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921381285.2U Expired - Fee Related CN210969415U (en) | 2019-08-23 | 2019-08-23 | Energy-saving cement feed metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210969415U (en) |
-
2019
- 2019-08-23 CN CN201921381285.2U patent/CN210969415U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |