CN210884261U - Novel powder vacuum feeding machine - Google Patents
Novel powder vacuum feeding machine Download PDFInfo
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- CN210884261U CN210884261U CN201921499328.7U CN201921499328U CN210884261U CN 210884261 U CN210884261 U CN 210884261U CN 201921499328 U CN201921499328 U CN 201921499328U CN 210884261 U CN210884261 U CN 210884261U
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Abstract
The utility model discloses a novel powder vacuum feeder, which comprises a frame, wherein the top of the frame is provided with a weighing device, the top of the weighing device is provided with a storage tank, the storage tank is connected with a feeding assembly, a discharging assembly and a vacuumizing assembly, the weighing device comprises a weighing sensor and a controller, a filter circuit, an amplifying and adjusting circuit and a signal stabilizing circuit which are sequentially connected are arranged between the weighing sensor and the controller, the weight of powder in the storage tank is detected in real time by the weighing sensor, and real-time weighing detection signals are sent into the filter circuit for LC filtering, thereby effectively improving the accuracy of the output of the weighing detection signals, the utility model discloses a circuit has simple and ingenious design, the amplifying and adjusting circuit is designed to enhance the filtered signals, thereby effectively eliminating the influence of a mechanical vibration symmetrical weighing sensor generated in the working process due to a vacuum pump and a vibration exciter, and improving the dynamic accuracy and stability of weighing, the powder blanking amount is ensured to be accurate, and the production control precision is improved.
Description
Technical Field
The utility model relates to a vacuum feeding equipment technical field especially relates to a novel powder vacuum feeding machine.
Background
The powder vacuum feeding machine is a relatively advanced powder conveying mode, the vacuum feeding machine adopts pneumatic conveying, the whole conveying process is carried in a closed process, and dust overflow cannot be caused. The existing powder vacuum feeding machine adopts a vacuum pump to vacuumize a storage tank during working, so that a certain pressure difference exists between a feeding device and the storage tank, and powder in the feeding device enters the storage tank through a feeding pipeline. Meanwhile, the weight of the powder in the storage tank is detected in real time by adopting a weighing sensor, when the set weight is reached, the vacuum pump stops working, then the blanking is started, the vibration exciter is started in the blanking process, and the powder is uniformly and continuously discharged under the vibration action of the vibration exciter. Because the mechanical vibration that vacuum pump and vibration exciter produced can influence the dynamic precision and the stability that weigh and detect in the course of the work, make the weighing detection value that the controller received have the deviation with the actual value, will appear the phenomenon that powder material loading is too much or too little in actual production process like this, influence the production quality.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention provides a novel vacuum powder feeding machine.
The technical scheme for solving the problem is as follows: the utility model provides a novel powder vacuum feeding machine, includes the frame, and the frame top sets up weighing device, and the weighing device top sets up the storage tank, and the storage tank is connected with material loading subassembly, unloading subassembly and evacuation subassembly, weighing device includes weighing sensor and controller, be provided with the filter circuit, the adjusting circuit that amplifies and the signal stabilization circuit that connect gradually between weighing sensor and the controller.
Preferably, the filter circuit comprises an inductor L1, one end of the inductor L1 is connected with one end of a resistor R1 and a signal output end of the load cell, the other end of the inductor L1 is connected with the other end of a resistor R1 and one ends of capacitors C1 and C2, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is connected with a signal input end of the amplification and adjustment circuit.
Preferably, the amplification regulating circuit comprises an operational amplifier U1, the non-inverting terminal of the operational amplifier U1 is connected to the other terminal of a capacitor C2, the inverting terminal of the operational amplifier U1 is grounded through a resistor R2, the output terminal of the operational amplifier U1 is connected to the inverting terminal of the operational amplifier U2 through a capacitor C3, the non-inverting terminal of the operational amplifier U2 is connected to one terminals of resistors R4 and R5, the other terminal of the resistor R4 is grounded, the other terminal of the resistor R5 is connected to the output terminal of the operational amplifier U2, and the output terminal of the operational amplifier U2 is further connected to the inverting input terminal of the operational amplifier U1 through a resistor R3 and a capacitor C4 which are connected in parallel.
Preferably, the signal stabilizing circuit comprises an operational amplifier U3 and a MOS transistor Q1, the in-phase end of the operational amplifier U3 is connected with the drain of the MOS transistor Q1 and one end of a resistor R6 through a resistor R7, the other end of the resistor R6 is connected with the output end of the operational amplifier U2, the output end of the operational amplifier U3 is connected with the gate of the MOS transistor Q1, the in-phase end of the operational amplifier U3 is further grounded through a voltage stabilizing tube DZ1, the inverting end of the operational amplifier U3 is connected with one end of resistors R8 and R9, the other end of the resistor R9 is grounded, the other end of the resistor R8 is connected with the source of the MOS transistor Q1 and is connected with the weighing signal detecting end of the controller through a capacitor C5, and a diode VD1 is connected between the source and the drain of the MOS.
Preferably, the feeding assembly is provided with at least 2 groups, and comprises a screw feeder, and a feeding pipeline is arranged between the screw feeder and the storage tank.
Preferably, the vacuumizing assembly comprises a vacuum pump, the vacuum pump is connected with the storage tank through an air exhaust pipeline, and a filter is further arranged on the air exhaust pipeline.
Preferably, the unloading subassembly includes down the hopper, the feed inlet of hopper is connected down the discharge gate of storage tank, be provided with the vibration exciter on the lateral wall of hopper down, the discharge gate of hopper sets up the unloading control valve down.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model has simple and ingenious circuit design, can effectively eliminate the influence of the mechanical vibration symmetrical load sensor generated in the working process due to the vacuum pump and the vibration exciter, improves the dynamic precision and stability of weighing detection, ensures the accurate blanking amount of powder, and improves the production control precision;
2. the weighing sensor is adopted to detect the weight of the powder in the material storage tank in real time, real-time weighing detection signals are sent to the filter circuit to be subjected to LC filtering, clutter signals of other frequencies are filtered by using the LC filtering principle, and the output accuracy of the weighing detection signals is effectively improved;
3. the design amplifies the signal enhancement after the regulating circuit is filtered, wherein fortune puts ware U1, U2 and adopts the series connection form to carry out the secondary amplification to the signal after the filtering to improve signal strength fast, adopt the effect that the resistance-capacitance feedback played signal compensation effectively at the amplification in-process simultaneously, guarantee the continuous stable output of detection signal of weighing, avoid the signal interruption or the undulant influence that cause because of the vibration well, guarantee the accuracy of controller control.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the weighing apparatus of the present invention.
In the figure: 1-feeding assembly, 2-material storage tank, 3-frame, 4-blanking hopper, 5-weighing device, 6-blanking control valve, 7-vibration exciter, 8-air exhaust pipeline, 9-filter and 10-vacuum pump.
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, a novel powder vacuum feeder comprises a frame 3, wherein a weighing device 5 is arranged at the top of the frame 3, a storage tank 2 is arranged at the top of the weighing device 5, and the storage tank 2 is connected with a feeding assembly 1, a discharging assembly and a vacuumizing assembly. Wherein, the material loading subassembly 1 sets up 2 groups at least, including the screw rod feeder, sets up feeding pipeline between screw rod feeder and the storage tank 2 to the realization is to the synchronous transportation of different powders, prevents to pollute each other between the different powders. The vacuumizing assembly comprises a vacuum pump 10, the vacuum pump 10 is connected with the storage tank 2 through an air exhaust pipeline 8, and a filter 9 is further arranged on the air exhaust pipeline 8 to prevent powder from invading the vacuum pump 10. The unloading subassembly includes hopper 4 down, and the discharge gate of storage tank 2 is connected to the feed inlet of hopper 4 down, is provided with vibration exciter 7 on the lateral wall of hopper 4 down, and hopper 4 can make the powder evenly discharge under the vibration of vibration exciter 7, guarantees that the unloading is unobstructed, and the discharge gate of hopper 4 down sets up unloading control valve 6 for control unloading volume. The weighing device 5 comprises a weighing sensor and a controller, and a filter circuit, an amplification regulating circuit and a signal stabilizing circuit which are sequentially connected are arranged between the weighing sensor and the controller for preventing the influence of vibration and weighing detection.
The weighing sensor detects the weight of the powder in the storage tank 2 in real time and sends a detection signal into the filter circuit for processing. As shown in fig. 2, the filter circuit includes an inductor L1, one end of the inductor L1 is connected to one end of a resistor R1 and a signal output end of the load cell, the other end of the inductor L1 is connected to the other end of a resistor R1 and one ends of capacitors C1 and C2, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is connected to a signal input end of the amplification and adjustment circuit. The output signal of the weighing sensor is sent into an LC filter formed by an inductor L1 and a capacitor C1, clutter signals of other frequencies are filtered by utilizing the LC filtering principle, and the accuracy of the output of the weighing detection signal is effectively improved.
The output signal of the retransmission sensor is usually in millivolt level, signal amplification processing is needed, and an amplification regulating circuit is designed to enhance the filtered signal. The amplifying and adjusting circuit comprises an operational amplifier U1, the in-phase end of the operational amplifier U1 is connected with the other end of a capacitor C2, the inverting end of the operational amplifier U1 is grounded through a resistor R2, the output end of the operational amplifier U1 is connected with the inverting end of the operational amplifier U2 through a capacitor C3, the in-phase end of the operational amplifier U2 is connected with one end of a resistor R4 and one end of a resistor R5, the other end of the resistor R4 is grounded, the other end of the resistor R5 is connected with the output end of an operational amplifier U2, and the output end of the operational amplifier U2 is connected with the inverting input end of the operational amplifier U1 through a resistor R3 and a capacitor C4. The LC filtered signal is coupled by a capacitor C2 and then sent to an operational amplifier U1 for amplification, and the output signal of the operational amplifier U1 is sent to U2 for secondary amplification, so that the signal intensity is rapidly improved. In the amplification process, the vibration of the weighing detection signal caused by vibration is amplified, and in order to avoid the influence of signal interruption or fluctuation on the control accuracy, resistance-capacitance feedback is formed in the operation and amplification process by adopting the resistor R3 and the capacitor C4, so that the signal compensation effect is effectively realized, and the continuous and stable output of the weighing detection signal is ensured.
An output signal of the operational amplifier U2 is sent into a signal stabilizing circuit for voltage stabilization output, the signal stabilizing circuit comprises an operational amplifier U3 and a MOS tube Q1, the in-phase end of the operational amplifier U3 is connected with the drain of the MOS tube Q1 and one end of a resistor R6 through a resistor R7, the other end of the resistor R6 is connected with the output end of the operational amplifier U2, the output end of the operational amplifier U3 is connected with the grid of the MOS tube Q1, the in-phase end of the operational amplifier U3 is also grounded through a voltage stabilizing tube DZ1, the inverting end of the operational amplifier U3 is connected with one ends of resistors R8 and R9, the other end of the resistor R9 is grounded, the other end of the resistor R8 is connected with the source of the MOS tube Q1 and is connected with the weighing signal detection end of the controller through a capacitor C5, and a diode VD1 is connected between the. The output signal of the operational amplifier U2 is subjected to resistance shunt, one part of the output signal is sent to the drain electrode of the MOS tube Q1, the other part of the output signal is sent to the operational amplifier U3 after the amplitude of the output signal is stabilized by a voltage regulator DZ1, the operational amplifier U3 is used for isolating and outputting the shunt signal by utilizing the principle of a voltage follower and is used as the grid voltage of the MOS tube Q1, the resistor R8 and the resistor R9 form a voltage dividing resistor, and the voltage of the homophase end of the operational amplifier U3 is stable, and the voltage of the two ends of the resistor R9 is stable according to the input voltage characteristic of the operational amplifier, so the source output voltage of the MOS tube Q1 has good stability, and finally the stable weighing detection signal is sent to the controller after being.
The utility model discloses when specifically using, adopt the powder weight in the weighing sensor real-time detection storage tank 2, and send the real-time detection signal of weighing into filter circuit and carry out the LC filtering, utilize the clutter signal of other frequencies of LC filtering principle filtering, effectively improve the accuracy of the detection signal output of weighing, then send into and amplify the signal of regulating circuit after to the filtering and strengthen, wherein fortune puts ware U1, U2 adopts the series connection form to carry out the secondary to the signal after the filtering and enlargies, thereby improve signal strength fast, adopt the effect that the resistance-capacitance feedback played signal compensation effectively simultaneously in the amplification process, guarantee the continuous stable output of detection signal of weighing, avoid the signal interruption or the undulant influence because of the vibration causes well, guarantee the accuracy of controller control. And finally, the signal is stable by a signal stabilizing circuit and a weight detection signal is sent to the controller. When the weighing detection value received by the controller reaches the set weight value of the system, the controller controls the vacuum pump 10 to stop working, and then controls the blanking control valve 6 to start blanking.
To sum up, the utility model discloses circuit design is simple ingenious, can effectively eliminate because of the influence of the mechanical vibration symmetrical weight sensor that vacuum pump 10 and vibration exciter 7 produced in the course of the work, improves the dynamic precision and the stability that weigh the detection, guarantees that the powder unloading volume is accurate, improves production control precision.
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 (7)
1. The utility model provides a novel powder vacuum feeding machine, includes the frame, and the frame top sets up weighing device, and the weighing device top sets up the storage tank, and the storage tank is connected with material loading subassembly, unloading subassembly and evacuation subassembly, its characterized in that: the weighing device comprises a weighing sensor and a controller, wherein a filter circuit, an amplification regulating circuit and a signal stabilizing circuit which are connected in sequence are arranged between the weighing sensor and the controller.
2. The novel powder vacuum feeder according to claim 1, characterized in that: the filter circuit comprises an inductor L1, one end of an inductor L1 is connected with one end of a resistor R1 and a signal output end of the weighing sensor, the other end of the inductor L1 is connected with the other end of a resistor R1 and one ends of capacitors C1 and C2, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is connected with a signal input end of the amplification regulating circuit.
3. The novel powder vacuum feeder according to claim 2, characterized in that: the amplifying and adjusting circuit comprises an operational amplifier U1, wherein the in-phase end of an operational amplifier U1 is connected with the other end of a capacitor C2, the reverse-phase end of the operational amplifier U1 is grounded through a resistor R2, the output end of the operational amplifier U1 is connected with the reverse-phase end of an operational amplifier U2 through a capacitor C3, the in-phase end of the operational amplifier U2 is connected with one ends of resistors R4 and R5, the other end of the resistor R4 is grounded, the other end of the resistor R5 is connected with the output end of an operational amplifier U2, and the output end of the operational amplifier U2 is connected with the reverse-phase input end of the operational amplifier U1 through a resistor R3 and a capacitor C4.
4. The novel powder vacuum feeder according to claim 3, characterized in that: the signal stabilizing circuit comprises an operational amplifier U3 and an MOS tube Q1, wherein the in-phase end of the operational amplifier U3 is connected with the drain of the MOS tube Q1 and one end of a resistor R6 through a resistor R7, the other end of the resistor R6 is connected with the output end of the operational amplifier U2, the output end of the operational amplifier U3 is connected with the grid of the MOS tube Q1, the in-phase end of the operational amplifier U3 is grounded through a voltage stabilizing tube DZ1, the inverting end of the operational amplifier U3 is connected with one end of resistors R8 and R9, the other end of the resistor R9 is grounded, the other end of the resistor R8 is connected with the source of the MOS tube Q1 and is connected with the weighing signal detecting end of the controller through a capacitor C5, and a diode VD1 is connected between the source and the drain of the.
5. The novel powder vacuum feeder according to claim 1, characterized in that: the feeding assembly is at least provided with 2 groups and comprises a screw feeder, and a feeding pipeline is arranged between the screw feeder and the storage tank.
6. The novel powder vacuum feeder according to claim 1, characterized in that: the vacuumizing assembly comprises a vacuum pump, the vacuum pump is connected with the storage tank through an air exhaust pipeline, and a filter is further arranged on the air exhaust pipeline.
7. The novel powder vacuum feeder according to claim 1, characterized in that: the feeding assembly comprises a feeding hopper, a feeding hole of the feeding hopper is connected with a discharging hole of the storage tank, a vibration exciter is arranged on the side wall of the feeding hopper, and a discharging hole of the feeding hopper is provided with a feeding control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499328.7U CN210884261U (en) | 2019-09-10 | 2019-09-10 | Novel powder vacuum feeding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499328.7U CN210884261U (en) | 2019-09-10 | 2019-09-10 | Novel powder vacuum feeding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210884261U true CN210884261U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921499328.7U Active CN210884261U (en) | 2019-09-10 | 2019-09-10 | Novel powder vacuum feeding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210884261U (en) |
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2019
- 2019-09-10 CN CN201921499328.7U patent/CN210884261U/en active Active
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