CN111765936A - High-precision liquid metering device and metering method thereof - Google Patents
High-precision liquid metering device and metering method thereof Download PDFInfo
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- CN111765936A CN111765936A CN202010655315.5A CN202010655315A CN111765936A CN 111765936 A CN111765936 A CN 111765936A CN 202010655315 A CN202010655315 A CN 202010655315A CN 111765936 A CN111765936 A CN 111765936A
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- China
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- liquid material
- connecting pipe
- flowmeter
- metering device
- variable frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
Abstract
The invention relates to the technical field of liquid material metering, in particular to a high-precision liquid material metering device which comprises a variable frequency pump and a support frame, wherein the outlet end of the variable frequency pump is connected with one end of a connecting pipe, the other end of the connecting pipe is connected with the upper end of a weighing hopper, a flowmeter is arranged on the connecting pipe, the support frame is in an inverted U shape, a weighing sensor is fixedly arranged at the lower end of a cross rod of the support frame, the lower end of the weighing sensor is connected with the upper end of the weighing hopper, a first valve is also arranged on the connecting pipe, the first valve is positioned between the flowmeter and the weighing hopper, the weight of liquid materials flowing in unit time is weighed through digital display curve comparison and feedback of the flowmeter and secondary decrement, the influence of performance parameters of the variable frequency pump can be completely avoided, the process of manually intervening and adjusting the rotating speed of a motor is, the liquid material precision is guaranteed.
Description
Technical Field
The invention relates to the technical field of liquid material metering, in particular to a high-precision liquid material metering device and a metering method thereof.
Background
In the prior art, only the liquid material continuous measurement with frequency conversion and speed regulation is adopted, and the principle of the scheme is as follows: the flow of the pump is changed by the change of the rotating speed of the motor according to the set parameters of the liquid value in the system, and the rotating speed of the motor can be adjusted in real time through the frequency converter, so that the flow of the pump is adjusted in real time through adjusting the parameters of the frequency converter, and the continuous metering value of the liquid required by equipment is achieved.
The disadvantages of this solution are: (1) in generalDuring conversion, the flow value of the motor in a 50HZ conversion state, such as YQ40-16-4, is obtained according to the fixed flow of the pump, and the flow is 40m3H, lift 16m and power 4 kw; in actual operation, however, due to the influence of a pump manufacturer, the actual flow and the use efficiency are deviated, so that the actual liquid weighing value is also deviated; (2) in the actual weighing process, the yield can be adjusted under the influence of other materials at the front section and the yield demand of customers, for example, an 800G stabilized soil mixing station has the theoretical production capacity of 800t/h, the water content of a finished product is 5 percent, and the required water content is 40t/h, but in the actual production process, when aggregate caking is encountered or the yield of the required finished product is reduced (for example, 500t/h), in the adjustment process, liquid material adjustment and aggregate and powder cannot be in real-time linkage adjustment, 5S-10S neutral can occur, the finished product has flaws, and the intervention solution is needed when paving at the rear end.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-precision liquid material metering device and a metering method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high accuracy liquid material metering device, includes inverter pump and support frame, the exit end of inverter pump is connected with the one end of connecting pipe, the other end of connecting pipe is connected with the upper end of weighing hopper, install the flowmeter on the connecting pipe, the support frame is the style of calligraphy of falling U, and the lower extreme fixed mounting of support frame horizontal pole has weighing sensor, weighing sensor's lower extreme is connected with the upper end of weighing hopper, still install first valve on the connecting pipe, first valve is located between flowmeter and the weighing hopper, be provided with the discharge gate on the lateral wall of weighing hopper, the second valve is installed to the lower extreme of weighing hopper.
Preferably, the connecting pipe is further provided with two rubber flexible joints corresponding to each other, and the rubber flexible joints are positioned on two sides of the flowmeter.
Preferably, the flowmeter further comprises two support rods, the two support rods are located on two sides of the flowmeter and fixedly connected with the outer wall of the connecting pipe, and the two support rods are located between the rubber flexible connectors.
Preferably, the bracing piece includes dead lever and movable rod, and dead lever and movable rod pass through screw fixed connection, and semicircular first recess has been seted up to the upper end of dead lever, and corresponding second recess has been seted up to the lower extreme of movable rod, and first recess and second recess cooperate and form a round hole, all splice on the inner wall of first recess and second recess and have the rubber layer.
Preferably, the rubber layer is in contact with the outer wall of the connecting pipe, and the inner diameter of a ring formed by the rubber layer is larger than the outer diameter of the connecting pipe.
Preferably, the flowmeter is a vortex shedding flowmeter.
Preferably, still include the singlechip, singlechip respectively with inverter pump, flowmeter and weighing sensor electric connection.
Preferably, the high-precision liquid material metering method comprises the following steps:
s1, extracting the liquid material through a variable frequency pump, digitally displaying the quantity of the liquid material in real time through a flowmeter, feeding back the throughput of the liquid material, and calculating the weight of the liquid material flowing through the weighing hopper in unit time through a weighing sensor;
and S2, adjusting the frequency converter according to the measured values of the flow meter and the weighing sensor, and controlling the rotating speed and the flow rate of the variable frequency pump, thereby realizing real-time accurate metering of the liquid material.
Preferably, the load cell is metered by a double decrement metering method.
The invention has the beneficial effects that:
1. the digital display curve of the flowmeter is compared and fed back, and the weight of the liquid material flowing in unit time is weighed by secondary decrement, so that the influence of performance parameters of the variable frequency pump can be completely avoided, the process of manually adjusting the rotating speed of the motor is reduced, the system is changed into automatic input and real-time rotating speed adjustment, and the precision of the liquid material is ensured.
2. When the output of the equipment meets abnormal conditions and the output is reduced, the accurate liquid material metering system can feed back and automatically adjust the supply quantity of the liquid material in real time, so that the metering requirement is met, and qualified finished products are produced.
Drawings
FIG. 1 is a schematic structural diagram of a high-precision liquid metering device according to the present invention;
FIG. 2 is a schematic perspective view of a high-precision liquid metering device according to the present invention;
fig. 3 is a schematic structural diagram of a support rod of a high-precision liquid metering device according to the present invention.
In the figure: the device comprises a variable frequency pump 1, a connecting pipe 2, a rubber flexible joint 3, a flow meter 4, a supporting rod 5, a first valve 6, a supporting frame 7, a weighing sensor 8, a weighing hopper 9, a discharge port 10, a second valve 11, a fixed rod 51, a movable rod 52 and a rubber layer 53.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a high accuracy liquid material metering device, includes inverter pump 1 and support frame 7, the exit end of inverter pump 1 is connected with the one end of connecting pipe 2, the other end of connecting pipe 2 is connected with the upper end of weighing hopper 9, install flowmeter 4 on connecting pipe 2, support frame 7 is the style of calligraphy of falling U, and the lower extreme fixed mounting of support frame 7 horizontal pole has weighing sensor 8, weighing sensor 8's lower extreme is connected with the upper end of weighing hopper 9, still install first valve 6 on connecting pipe 2, first valve 6 is located between flowmeter 4 and the weighing hopper 9, be provided with discharge gate 10 on the lateral wall of weighing hopper 9, second valve 11 is installed to the lower extreme of weighing hopper 9.
Further, the connecting pipe 2 is also provided with two rubber flexible joints 3 corresponding to each other, and the rubber flexible joints 3 are positioned on two sides of the flowmeter 4.
Further, the flowmeter also comprises two support rods 5, the two support rods 5 are positioned at two sides of the flowmeter 4, the support rods 5 are fixedly connected with the outer wall of the connecting pipe 2, and the support rods 5 are positioned between the rubber flexible joints 3.
Further, the support rod 5 comprises a fixed rod 51 and a movable rod 52, the fixed rod 51 and the movable rod 52 are fixedly connected through screws, a first semicircular groove is formed in the upper end of the fixed rod 51, a second corresponding groove is formed in the lower end of the movable rod 52, the first groove and the second groove are matched to form a round hole, and a rubber layer 53 is glued to the inner walls of the first groove and the second groove.
Further, the outer wall of rubber layer 53 and connecting pipe 2 contacts, and the internal diameter of the ring that rubber layer 53 formed is greater than the external diameter of connecting pipe 2, plays certain bradyseism effect through 5 connecting pipes of bracing piece 2, can improve the accuracy of flowmeter 4 reading to a certain extent.
Further, the flowmeter 4 is a vortex shedding flowmeter.
Further, still include the singlechip, the singlechip respectively with inverter pump 1, flowmeter 4 and weighing sensor 8 electric connection.
Further, a high-precision liquid material metering method comprises the following steps:
s1, extracting the liquid material through the variable frequency pump 1, digitally displaying the quantity of the liquid material in real time through the flowmeter 4 and feeding back the throughput of the liquid material, and calculating the weight of the liquid material flowing through the weighing hopper in unit time through the weighing sensor 8;
and S2, adjusting the frequency converter according to the measured values of the flow meter 4 and the weighing sensor 8, and controlling the rotating speed and the flow of the variable frequency pump 1, thereby realizing real-time accurate metering of the liquid material.
Further, the weighing sensor 8 measures the weight by a secondary decrement measuring method.
In the embodiment, digital display curve pair comparison and feedback of the flowmeter are carried out, and the weight of the liquid material flowing in unit time is weighed by secondary decrement, so that the influence of performance parameters of the variable frequency pump can be completely avoided, the process of manually adjusting the rotating speed of the motor by intervention is reduced, the system is changed into automatic input and real-time rotating speed adjustment, and the precision of the liquid material is ensured.
When the output of the equipment meets abnormal conditions and the output is reduced, the accurate liquid material metering system can feed back and automatically adjust the supply quantity of the liquid material in real time, so that the metering requirement is met, and qualified finished products are produced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A high-precision liquid material metering device comprises a variable frequency pump (1) and a supporting frame (7), it is characterized in that the outlet end of the variable frequency pump (1) is connected with one end of a connecting pipe (2), the other end of the connecting pipe (2) is connected with the upper end of the weighing hopper (9), a flowmeter (4) is arranged on the connecting pipe (2), the support frame (7) is inverted U-shaped, the lower end of the cross rod of the support frame (7) is fixedly provided with a weighing sensor (8), the lower end of the weighing sensor (8) is connected with the upper end of the weighing hopper (9), a first valve (6) is also arranged on the connecting pipe (2), the first valve (6) is positioned between the flowmeter (4) and the weighing hopper (9), a discharge hole (10) is formed in the side wall of the weighing hopper (9), and a second valve (11) is installed at the lower end of the weighing hopper (9).
2. A high precision liquid material metering device according to claim 1, characterized in that the connecting pipe (2) is further provided with two corresponding rubber flexible joints (3), and the rubber flexible joints (3) are positioned at two sides of the flowmeter (4).
3. A high-precision liquid material metering device according to claim 2, characterized by further comprising two support rods (5), wherein the support rods (5) are located on two sides of the flow meter (4), the support rods (5) are fixedly connected with the outer wall of the connecting pipe (2), and the support rods (5) are located between the rubber flexible joints (3).
4. The high-precision liquid metering device of claim 3, wherein the supporting rod (5) comprises a fixed rod (51) and a movable rod (52), the fixed rod (51) and the movable rod (52) are fixedly connected through screws, a semicircular first groove is formed in the upper end of the fixed rod (51), a corresponding second groove is formed in the lower end of the movable rod (52), the first groove and the second groove are matched to form a circular hole, and rubber layers (53) are glued to the inner walls of the first groove and the second groove.
5. A high accuracy liquid material metering device according to claim 4, characterized in that the rubber layer (53) is in contact with the outer wall of the connecting pipe (2), and the inner diameter of the ring formed by the rubber layer (53) is larger than the outer diameter of the connecting pipe (2).
6. A high accuracy liquid material metering device according to claim 1, characterized in that the flow meter (4) is a vortex shedding flow meter.
7. The high-precision liquid metering device of claim 1, further comprising a single chip microcomputer, wherein the single chip microcomputer is electrically connected with the variable frequency pump (1), the flowmeter (4) and the weighing sensor (8) respectively.
8. A high-precision liquid material metering method according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, extracting the liquid material through the variable frequency pump (1), digitally displaying the quantity of the liquid material in real time through the flowmeter (4) and feeding back the throughput of the liquid material, and calculating the weight of the liquid material flowing through the weighing hopper in unit time through the weighing sensor (8);
and S2, adjusting the frequency converter according to the measured values of the flow meter (4) and the weighing sensor (8), and controlling the rotating speed and the flow rate of the variable frequency pump (1), thereby realizing real-time accurate metering of the liquid material.
9. A high-precision liquid material metering method as claimed in claim 8, characterized in that the weighing sensor (8) meters by means of double decrement metering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655315.5A CN111765936A (en) | 2020-07-09 | 2020-07-09 | High-precision liquid metering device and metering method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655315.5A CN111765936A (en) | 2020-07-09 | 2020-07-09 | High-precision liquid metering device and metering method thereof |
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| CN202010655315.5A Pending CN111765936A (en) | 2020-07-09 | 2020-07-09 | High-precision liquid metering device and metering method thereof |
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Citations (11)
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| CN2229073Y (en) * | 1995-03-09 | 1996-06-12 | 山东鲁北化工总厂 | Flow regulator |
| JP2000162013A (en) * | 1998-11-25 | 2000-06-16 | Yazaki Corp | Flow rate detector |
| CN1643348A (en) * | 2002-04-10 | 2005-07-20 | Vega格里沙贝两合公司 | Level measurement device having electronics and antenna in one housing |
| CN103273582A (en) * | 2013-05-15 | 2013-09-04 | 青岛海洋鲨科技有限公司 | High-precision automatic weight loss type static material mixing system and method |
| CN203364893U (en) * | 2013-08-05 | 2013-12-25 | 长兴煤山新型炉料有限公司 | Powder measuring device |
| JP2014006249A (en) * | 2012-05-31 | 2014-01-16 | Jfe Advantech Co Ltd | Solid flow rate measuring device |
| CN204415766U (en) * | 2014-12-31 | 2015-06-24 | 大连金马衡器有限公司 | High Precision Automatic Weighing system |
| CN106370242A (en) * | 2016-09-09 | 2017-02-01 | 上海曼孚机电控制工程有限公司 | Flow-dividing dynamic flow balance for spraying bulk materials |
| CN208937164U (en) * | 2018-12-14 | 2019-06-04 | 达森(天津)材料科技有限公司 | A kind of accurate measuring device for input and output material |
| CN110455524A (en) * | 2019-08-07 | 2019-11-15 | 中国北方发动机研究所(天津) | A kind of monomer pump control valve flow testing device |
| CN209894230U (en) * | 2019-07-05 | 2020-01-03 | 广州论衡控制设备有限公司 | Intelligent accurate metering device |
-
2020
- 2020-07-09 CN CN202010655315.5A patent/CN111765936A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229073Y (en) * | 1995-03-09 | 1996-06-12 | 山东鲁北化工总厂 | Flow regulator |
| JP2000162013A (en) * | 1998-11-25 | 2000-06-16 | Yazaki Corp | Flow rate detector |
| CN1643348A (en) * | 2002-04-10 | 2005-07-20 | Vega格里沙贝两合公司 | Level measurement device having electronics and antenna in one housing |
| JP2014006249A (en) * | 2012-05-31 | 2014-01-16 | Jfe Advantech Co Ltd | Solid flow rate measuring device |
| CN103273582A (en) * | 2013-05-15 | 2013-09-04 | 青岛海洋鲨科技有限公司 | High-precision automatic weight loss type static material mixing system and method |
| CN203364893U (en) * | 2013-08-05 | 2013-12-25 | 长兴煤山新型炉料有限公司 | Powder measuring device |
| CN204415766U (en) * | 2014-12-31 | 2015-06-24 | 大连金马衡器有限公司 | High Precision Automatic Weighing system |
| CN106370242A (en) * | 2016-09-09 | 2017-02-01 | 上海曼孚机电控制工程有限公司 | Flow-dividing dynamic flow balance for spraying bulk materials |
| CN208937164U (en) * | 2018-12-14 | 2019-06-04 | 达森(天津)材料科技有限公司 | A kind of accurate measuring device for input and output material |
| CN209894230U (en) * | 2019-07-05 | 2020-01-03 | 广州论衡控制设备有限公司 | Intelligent accurate metering device |
| CN110455524A (en) * | 2019-08-07 | 2019-11-15 | 中国北方发动机研究所(天津) | A kind of monomer pump control valve flow testing device |
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