CN209802425U - Continuous dynamic adjustable metering device - Google Patents
Continuous dynamic adjustable metering device Download PDFInfo
- Publication number
- CN209802425U CN209802425U CN201920770890.2U CN201920770890U CN209802425U CN 209802425 U CN209802425 U CN 209802425U CN 201920770890 U CN201920770890 U CN 201920770890U CN 209802425 U CN209802425 U CN 209802425U
- Authority
- CN
- China
- Prior art keywords
- motor
- metering device
- frequency converter
- adjustable metering
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Flow Control (AREA)
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a continuous dynamic adjustable metering device, which comprises a motor and a control box, wherein the motor is connected with a displacement pump through a coupling, the outlet of the displacement pump is connected with a liquid flowmeter through a conveying pipeline, the control box comprises a frequency converter and a controller, the motor is electrically connected with the frequency converter, and the liquid flowmeter and the frequency converter are respectively and electrically connected with the controller; generally, the utility model discloses make little flow measurement and continuous regulation's precision higher, the metering error that has significantly reduced, the metering effect is better.
Description
Technical Field
The utility model relates to a flow measurement technical field, in particular to adjustable metering device of continuous developments.
Background
In the application of the existing metering pump, two control schemes are generally adopted for achieving the purpose of controlling the flow: firstly, the flow of liquid is adjusted by manually rotating a flow adjusting handle; secondly, flow regulation is realized by regulating the rotating speed of the metering pump through a frequency converter; however, because the metering pump belongs to a displacement pump, the flow rate fluctuates in a sine curve, and the accurate flow rate output by the metering pump cannot be obtained in real time during use, so that the two flow rate adjusting modes have certain blindness, and the use precision of the metering pump is greatly reduced; especially in the fine chemistry industry field and the concrete mixing field, the flow of the measuring pump needs frequent change in the use, and the traditional control mode has long operation reaction time, low flow control precision and large accumulative error, and can not meet the process requirements.
In the patent with the application number of CN201820299571.3, a metering pump, a buffer, a flowmeter, a controller and a frequency converter are adopted to control the flow of the metering pump; although the method adopts the flowmeter to measure the flow value of the metering pump and feed the flow value back to the system, the system calculates and adjusts the frequency converter to control the metered flow rate; it has two major disadvantages: firstly, at the initial stage of starting the metering pump, when the buffer is not filled with enough liquid, the whole pipeline has insufficient pressure to flow out of the metering liquid, and further cannot be atomized at an outlet, at the moment, the pump is metering, but no liquid flows out or the flow rate of the flowing liquid is small, and the metering precision is not mentioned; secondly, in the continuous metering process of small flow, when the pressure of the buffer is insufficient, gas needs to be supplemented through a valve, and the pressure in the buffer is changed in the process of supplementing gas or relieving pressure; in the metering of the small flow of the concrete additive, because the metering error of the additive has great influence on the quality of the concrete, although the buffer can eliminate or slow down the pulsation of the metering pump, the metering error is large because the metering error still has great influence on the metering and continuous adjustment precision of the additive; therefore, to solve the above problems, a continuously dynamically adjustable metering device is needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a measurement accuracy is high, the effectual adjustable metering device of continuous developments of measurement.
In order to achieve the above object, the utility model provides an adjustable metering device of continuous developments, including motor, control box, the motor has the displacement pump through the coupling joint, the displacement pump exit is connected with fluidflowmeter through pipeline, the control box includes converter and controller, the motor is connected with the converter electricity, fluidflowmeter, converter electricity connection director respectively.
The motor adopts a three-phase asynchronous motor.
The displacement pump adopts a stainless steel screw pump.
The liquid flowmeter adopts a flange type electromagnetic flowmeter.
The controller adopts a PLC controller.
The liquid flowmeter is connected with a spraying device through a conveying pipeline and a connector.
The spraying device adopts an atomizing nozzle.
The beneficial effects of the utility model reside in that:
The utility model utilizes the frequency converter to feed back and adjust the rotating speed of the displacement pump, can accurately and continuously control the flow of the displacement pump, quantitatively adjust and measure the displacement pump, realizes high-precision measurement, and solves the problem of low precision of the flow of the unsteady flow in the continuous adding process of the small-flow liquid additive; meanwhile, certain pressurization is realized, so that the requirement of partial liquid atomization is met; in the whole process, the flow required in different time periods is different, the target value can be continuously adjusted according to the requirement, and the whole process forms closed loop feedback, so that the metering precision is improved, the metering error is reduced, and the metering effect is better; generally, the utility model has the advantages of the measurement accuracy is high, the measurement is effectual.
Drawings
Fig. 1 is a schematic structural diagram of the metering device of the present invention.
Fig. 2 is a flow chart of the present invention.
Fig. 3 is a frequency-flow curve according to the present invention.
Fig. 4 is a flow-frequency feedback control regulation curve of the present invention.
In the figure: 1. the device comprises a motor 2, a coupling 3, a stainless steel screw pump 31, a pump inlet 32, a pump outlet 4, a conveying pipeline 5 and a liquid flowmeter.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, a continuously dynamic adjustable metering device comprises a motor 1 and a control box, wherein the motor 1 is connected with a stainless steel screw pump 3 through a coupler 2, the motor 1 provides power required by the stainless steel screw pump 3 during working, the stainless steel screw pump 3 can effectively solve the influence of partial liquid on the corrosion of the metering device, the corrosion resistance of the stainless steel screw pump 3 is enhanced, a pump outlet 32 of the stainless steel screw pump 3 is connected with a liquid flow meter 5 through a conveying pipeline 4, the liquid flow meter 5 is used for measuring the flow at the pump outlet 32 of the stainless steel screw pump 3 and feeding back the measured value to a controller, the control box comprises a frequency converter and a controller, the motor 1 is electrically connected with the frequency converter, the liquid flow meter 5 and the frequency converter are respectively and electrically connected with the controller, and the frequency of the motor 1 is adjusted by the feedback of the frequency, the flow of the stainless steel screw pump 3 is adjusted, so that the continuous flow quantitative adjustment and measurement are accurately controlled, and meanwhile, the stainless steel screw pump 3 has certain pressurization so as to meet the requirement of partial liquid atomization and realize high-precision measurement.
the motor 1 adopts a three-phase asynchronous motor.
The liquid flowmeter 5 adopts a flange type electromagnetic flowmeter, so that the assembly and disassembly are convenient; the controller adopts the PLC controller, is convenient for realize control.
The liquid flowmeter 5 is connected with a spraying device through a pipeline and the outside of the joint, and the spraying device adopts an atomizing nozzle for atomizing additives and the like.
The utility model discloses application method does:
Presetting a given value of a frequency converter, starting the motor 1, the stainless steel screw pump 3 and the frequency converter, and driving the stainless steel screw pump 3 to work by the motor 1; when the stainless steel screw pump 3 works normally, the liquid flowmeter 5 measures the real-time flow of the stainless steel screw pump 3 and feeds the measured value back to the controller through communication; the controller compares the flow value measured by the liquid flowmeter 5 with the set value of the frequency converter, adjusts the frequency converter in real time after comparison and calculation, and adjusts the speed of the stainless steel screw pump 3 by adjusting the frequency converter, thereby completing the adjustment of the instantaneous flow value to make the instantaneous flow value reach the set value of the frequency converter.
As shown in fig. 3 and 4, the instantaneous flow rate of the stainless steel screw pump 3 changes with the instantaneous frequency change of the frequency converter, and the flow rate change changes in a direct proportion relation with the frequency change; when the set flow changes or the real-time flow deviates from the set value, the flow is fed back to the frequency converter through the controller, the frequency converter immediately carries out frequency adjustment to control the real-time flow, so that the flow approaches or reaches the set target value, and the flow quantitative adjustment and metering are accurately and continuously controlled.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A continuous dynamic adjustable metering device is characterized in that: the electric control system comprises a motor and a control box, wherein the motor is connected with a displacement pump through a coupler, a liquid flowmeter is connected to the outlet of the displacement pump through a conveying pipeline, the control box comprises a frequency converter and a controller, the motor is electrically connected with the frequency converter, and the liquid flowmeter and the frequency converter are electrically connected with the controller respectively.
2. A continuously dynamically adjustable metering device as claimed in claim 1 wherein: the motor adopts a three-phase asynchronous motor.
3. A continuously dynamically adjustable metering device as claimed in claim 1 wherein: the displacement pump adopts a stainless steel screw pump.
4. A continuously dynamically adjustable metering device as claimed in claim 1 wherein: the liquid flowmeter adopts a flange type electromagnetic flowmeter.
5. A continuously dynamically adjustable metering device as claimed in claim 1 wherein: the controller adopts a PLC controller.
6. A continuously dynamically adjustable metering device as claimed in claim 1 wherein: the liquid flowmeter is connected with a spraying device through a conveying pipeline and a connector.
7. A continuously dynamically adjustable metering device as claimed in claim 6 wherein: the spraying device adopts an atomizing nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920770890.2U CN209802425U (en) | 2019-05-27 | 2019-05-27 | Continuous dynamic adjustable metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920770890.2U CN209802425U (en) | 2019-05-27 | 2019-05-27 | Continuous dynamic adjustable metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209802425U true CN209802425U (en) | 2019-12-17 |
Family
ID=68833074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920770890.2U Active CN209802425U (en) | 2019-05-27 | 2019-05-27 | Continuous dynamic adjustable metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209802425U (en) |
-
2019
- 2019-05-27 CN CN201920770890.2U patent/CN209802425U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7967168B2 (en) | Process for controlling a dosing device for liquid or pasty media; dosing device; and industrial robot | |
| CN105594679B (en) | Based on or include the precision and quantity-variation atomizing tester of electrodynamic pump rotational speed regulation | |
| CN103266646A (en) | Variable frequency variable pressure water supply implementation method and variable frequency variable pressure water supply implementation device | |
| CN209802425U (en) | Continuous dynamic adjustable metering device | |
| CN101994906A (en) | Flow stabilizing device | |
| CN201534071U (en) | Full automatic continuous dosing device | |
| CN208138124U (en) | A kind of metering pump control system accurately controlling flow | |
| CN206579010U (en) | One kind is used for the on-line automatic regulating system of silicone adhesive quantity-produced flow | |
| CN110142876A (en) | A kind of accelerator conveying speed-adjusting and control system and scaling method | |
| CN207552450U (en) | A kind of continuous electroplating tin unit is passivated section chemicals dosing plant | |
| CN206573952U (en) | A kind of Generator Stator Cooling water basification automaton | |
| CN213669617U (en) | Automatic metering and conveying device for auxiliary agent of ball mill | |
| CN108955781A (en) | A kind of digital frequency conversion measurement controller of strong corrosive liquid medium flow | |
| CN209646468U (en) | A kind of ternary precursor high-accuracy stable charging device | |
| CN213644735U (en) | Gluing pressure adjusting system | |
| CN113412719A (en) | Fertilizer suction flow measurement and control integrated device and control method thereof | |
| CN106696111A (en) | Flow online automatic regulating system and method for silicone adhesive continuous production | |
| CN210261168U (en) | Potassium permanganate adding device controlled by PLC | |
| CN217782225U (en) | Stabilized soil mixing station constant pressure water supply device | |
| CN202667047U (en) | Double-flowmeter digitization spraying system for robot | |
| CN110202012A (en) | A kind of secondary cold-rolling emulsification direct mixed lubrication system of liquid pipeline | |
| CN202583899U (en) | Liquid-feeding automatic control system and control device | |
| CN201444259U (en) | Flow-rate stabilizing device | |
| CN111974571A (en) | Paint spraying flow control system | |
| CN218308920U (en) | Glue dispensing mechanism and glue laminating equipment comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201125 Address after: 461000 southeast corner of Longxiang Road and Chenzhuang Street intersection in Xuchang City, Henan Province Patentee after: Xuchang Detong vibration mixing technology Co., Ltd Address before: 461000 southeast corner of Longxiang Road and Chenzhuang Street intersection in Xuchang City, Henan Province Patentee before: Xuchang Detong Concrete Industry Technology Research Institute Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 461000 southeast corner of Longxiang Road and Chenzhuang Street intersection in Xuchang City, Henan Province Patentee after: Detong Intelligent Technology Co.,Ltd. Address before: 461000 southeast corner of Longxiang Road and Chenzhuang Street intersection in Xuchang City, Henan Province Patentee before: Xuchang Detong vibration mixing technology Co.,Ltd. |