CN216024690U - Viscous liquid proportioning device - Google Patents

Abstract

The utility model discloses a viscous liquid proportioning device which comprises: two or more groups of viscous liquids are respectively stored in different sealable containers; the gas flowmeter is connected with the pipeline at one end of the closed container; an injection pipeline of a constant-pressure air source is arranged at the input end of the air flow meter; an output pipeline of viscous liquid is connected with the other end of the closed container, and an output pump is connected with the output pipeline; the output pump end is connected with the mixer through a pipeline; the air flow meter and the output pump are electrically connected to the computing unit. The whole system realizes high-accuracy indirect measurement and output proportioning control, and has simple structure, low cost and high accuracy; and non-contact metering and proportioning control of viscous liquid in a closed environment can be realized.

Description

Viscous liquid proportioning device

Technical Field

The utility model relates to the technical field of viscous liquid flow measurement, in particular to a viscous liquid proportioning device.

Background

In the industry of flexible packaging composite equipment, with the attention of environmental protection awareness and food safety, solvent-free composite machines are widely advocated; the solvent-free adhesive is an important adhesive, and the solvent-free adhesive is a viscous substance, and the two separated materials are connected together by virtue of the viscosity property of the solvent-free adhesive and are in a viscous liquid state at normal temperature; usually, in actual use, it is used in a predetermined ratio by dividing it into A/B components.

Generally, equipment manufacturers need to fill all components without solvent into a glue dispensing barrel, and pump out viscous liquids of raw materials respectively through pumps and mix the viscous liquids according to a preset proportion, so that how to accurately match the viscous liquids of all the components becomes an industrial problem. The conventional proportioning method is to directly measure the flow of each component by a flowmeter to carry out proportioning, but the measurement difficulty is high due to the viscosity of a solvent-free adhesive, the measurement accuracy is limited, and the risk of pipe blockage is accompanied; and the difficulty is higher when the proportion needs to be controlled and the dosage of each component needs to be accurate.

Therefore, there is a need for a measuring system and method for measuring viscous liquids with high accuracy and a system for providing accurate proportioning by the measuring system.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a flow measuring system and a flow measuring method for viscous liquid and a proportioning system thereof, which can eliminate the unsolved defects in the prior art.

Therefore, it is an object of the present invention to provide a proportioning device for a multi-component viscous liquid, which is low in cost and high in accuracy.

These and other objects will be apparent to those skilled in the art from the following description and the accompanying drawings.

To achieve the above object, the present invention provides: a viscous liquid proportioning device comprises two or more groups of sealable containers for containing viscous liquid, wherein each container is provided with an opening, a constant pressure device for keeping the air pressure in the container constant and an airflow meter for measuring the airflow entering the container are connected to the openings, an outlet end of the container is connected with an output pump, and an output end of the output pump is connected with a mixer for mixing the two or more groups of viscous liquid; the output pump and the gas flowmeter are also respectively connected with a computing unit.

The whole structure is simple, the device realizes indirect measurement of the flow of the viscous liquid, and the whole system has simple structure, low cost and high accuracy; and non-contact metering and proportioning control of viscous liquid in a closed environment can be realized.

The proportion control method of the viscosity proportion device comprises the steps of respectively injecting certain volumes of viscosity liquid into a container, and then sealing the container; the gas forms a constant pressure gas source through a constant pressure device and is injected into the container, so that the gas is filled in the residual space in the container, after the gas in the steps is completely filled in the residual space and keeps constant pressure, the calculation unit starts and records the gas flow at the moment as an initial value, two or more groups of viscous liquid mass ratio are preset in the calculation unit, the output pump is started and works according to the preset mass ratio, during the working period of the output pump, the volume of the viscous liquid in the barrel is reduced, the internal residual space is increased, and the constant pressure gas source is supplemented in real time through the flow meter; the calculating unit collects data of the gas flow meter and calculates the flow volume entering the container through the working time, then the mass reduction quality of the viscous liquid in each container is respectively determined through the functional relation between the mass and the volume, and the calculating unit is used for carrying out proportion check on the mass reduction quality of two or more groups of viscous liquids; then feeding back the working parameters of the output pump controlled by the computing unit to complete the ratio control of the multi-component viscous liquid; wherein the gas comprises an inert gas immiscible with the viscous liquid.

The proportioning control method carries out automatic proportioning through the calculation unit, proofreads are carried out through the detected proportioning, and the accurate proportioning is achieved through the proofreading, so that the accuracy of the proportioning is ensured; and the viscous liquid is indirectly measured through the gas, so that a novel detection method is provided for the measurement of the viscous liquid.

Further, the container is a constant temperature glue barrel. The constant temperature setting ensures the constancy of the temperature in the barrel, avoids the change of the whole liquid and gas pressure caused by the temperature, and improves the accuracy of the gas flow calculation.

Further, the pump is a gear pump. The setting of gear pump for output is more stable.

Further, the output pump is communicated with the container through an output pipeline.

The utility model has the beneficial effects that: two or more groups of viscous liquids are respectively stored in different sealable containers; the gas flowmeter is connected with the pipeline at one end of the closed container; an injection pipeline of a constant-pressure air source is arranged at the input end of the air flow meter; an output pipeline of viscous liquid is connected with the other end of the closed container, and an output pump is connected with the output pipeline; the output pump end is connected with the mixer through a pipeline; the air flow meter and the output pump are electrically connected to the computing unit. The whole system realizes high-accuracy indirect measurement and output proportioning control, and has simple structure, low cost and high accuracy; and non-contact metering and proportioning control of viscous liquid in a closed environment can be realized.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a diagram of a viscous liquid proportioning device according to an embodiment of the utility model.

In the figure, a container 1, an air flow meter 2, a constant pressure device 3, an output pump 4, a mixer 5, a calculation unit 6, an output pipe 7, and a standard pipe 8.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

As shown in fig. 1, the present invention provides a viscous liquid proportioning device, comprising two or more sets of sealable containers 1 for containing viscous liquids, each of the containers 1 having an opening, the openings being connected to a constant pressure device 3 for maintaining a constant air pressure in the container 1 and an air flow meter 2 for measuring a flow rate of air entering the container 1, wherein the air flow meter 2 is mounted on a standard pipe 8, the pipe being communicated with the constant pressure device 3, such that air is input into the standard pipe 8 through the constant pressure device 3, and then is input into the container 1 through the air flow meter 2, an output pump 4 is connected to an outlet end of the container 1 through an output pipe 7, and an output end of the output pump 4 is connected to a mixer 5 for mixing two or more sets of viscous liquids; the output pump 4 and the gas flowmeter 2 are also respectively connected with a calculating unit 6, and two or more groups of viscous liquid proportioning presets and proportioning control are realized through the calculating unit 6. Wherein the container 1 is a constant temperature glue barrel. The constant temperature setting ensures the constant temperature in the barrel, avoids the change of the whole liquid and gas pressure caused by the temperature, and improves the accuracy of the calculation of the gas flow meter 2. The output pump 4 is a gear pump. The setting of gear pump can be better ration, can produce stable pressure differential, and is more convenient to liquid mixture ratio two components and more than two components.

The whole structure is simple, the device realizes indirect measurement of the flow of the viscous liquid, and the whole system has simple structure, low cost and high accuracy; the non-contact metering and proportioning control of viscous liquid in a closed environment is realized, and the bonding problem caused by the adoption of a conventional flow measuring instrument is avoided.

The proportioning control method of the viscosity proportioning device comprises the following steps:

s1, respectively injecting a certain volume of viscous liquid into the container 1, and then sealing the container 1; the gas forms a constant pressure gas source through the constant pressure device 3 and is injected into the container 1, so that the gas fills the residual space in the container 1; specifically be, open container 1 to make container 1 keep the uniform temperature, inject the stickness liquid of the same temperature and constantly keep the invariant of bucket internal temperature into container 1, stickness liquid pours into the back of accomplishing, closes container 1 and makes container 1 airtight, carries out foretell gas injection operation afterwards, in the gas injection operation process, needs make in the container 1 residual space all inject into gas.

S2, after the gas in step S1 completely fills the remaining space and maintains a constant pressure, the computing unit 6 starts and records the gas flowmeter 2 as an initial value at this time, and two or more sets of mass ratios of the viscous liquids are preset in the computing unit 6, wherein a specific example of the gas completely filling the remaining space is as follows: through setting up a check valve for continuous check valve evacuation to the outside detects inside exhaust gas, has just realized that this gas has filled completely the residual space after inside does not have other gas. The mass proportion in each container 1 is preset in the calculation unit 6 by self-definition through other means such as a control panel and the like;

s3, starting the output pump 4, enabling the output pump 4 to work according to a preset mass ratio, wherein the preset mass ratio is controlled by the rotating speed of the output pump 4, during the working period of the output pump 4, the volume of viscous liquid in the barrel is reduced, the internal residual space is increased, and a constant pressure air source is supplemented in real time through a flowmeter; the calculating unit 6 collects the data of the gas flow meter 2 and calculates the flow volume entering the container 1 through the working time, then determines the mass reduced by the viscous liquid in the working time of each container 1 through the functional relation between the mass and the volume,

s4, performing proportion check on the reduced quality of two or more groups of viscous liquids through the calculating unit 6; then the working parameters of the output pump 4 are controlled through the calculating unit 6 to complete the ratio control of the multi-component viscous liquid;

wherein the gas comprises an inert gas immiscible with the viscous liquid. The setting of inert gas ensures the accuracy of the proportioning.

The working principle is as follows: the gas source enters the gas flowmeter 2 through the constant pressure device 3 and the pipeline, and finally enters the container 1 which can be closed; during the working period of the output pump 4, the volume of the viscous liquid in the barrel is reduced, the internal space is increased, and a constant pressure air source is supplemented in real time through the flowmeter; acquiring the flow volume of the gas flowmeter 2 through the calculating unit 6, and determining the reduced mass of the single viscous liquid through a correlation function relation; the mass of two or more groups of viscous liquids is compared in proportion by the calculating unit 6; and then the working parameters of the output pump 4 are controlled by the computing unit 6 to complete the ratio control of the multi-component viscous liquid.

Through above this kind of mode, turn into the flow proportion that the gas that airtight container 1 was interior with the quality ratio of stickness liquid got into for the ratio is more accurate, and flow measurement simple structure, the measurement accuracy height of single set of stickness liquid in whole proportioning system, with low costs, and then make whole proportioning system ratio more accurate. It should be noted that the constant pressure device 3 keeps the pressure constant at 1-1.2 standard atmospheric pressures, and ensures that the volume of gas injection is the same as the volume of viscous liquid pumped out, V liquid out is V gas in, so as to obtain the volume of liquid pumped out within a certain time, and further obtain the flow rate of the viscous liquid to be measured through a calculation function relation of the liquid flow rate.

In the following, a specific example is provided, in a standard state, the raw material quality of each component is selected according to the predetermined mixed binder amount and the blending ratio, and the operation is performed by the above-mentioned ratio control device and ratio control method; then, a mixing proportion and the density rho of liquid in each container 1 are preset in a self-defined mode through a calculating unit 6, and after the mixing proportion is set, the rotating speed of each gear pump is constant; then the gas flow Q measured by the gas flowmeter after the initialization becomes the S section V flow velocity, where the S section is the cross-sectional area of the inner diameter of the standard pipeline 8, and the V flow velocity is the flow velocity of the injected gas, then the volume of the gas entering the container 1 within the working time t becomes the V inlet becomes the Q inlet, and since the container 1 is a closed space and is in a standard state, the V outlet becomes the V inlet; because the density rho of the viscous liquid is known before proportioning, the mass of the viscous liquid pumped out within a certain time can be obtained by discharging the liquid with M ═ rho V; therefore, the calculation unit 6 can obtain an actual proportion through the data collected by the air flow machine and the preset density rho, the actual proportion is compared with the preset mixing proportion, if the comparison deviation is within the allowable deviation range, the calculation unit 6 does not perform feedback adjustment, and if the proportion exceeds the deviation range, the bronze drum calculation unit 6 is required to perform feedback adjustment to adjust the parameters (rotating speed) of the gear pump, so that the aim of controlling the proportion is fulfilled.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (4)

1. A viscous liquid proportioning device is characterized by comprising two or more groups of sealable containers for containing viscous liquid, wherein each container is provided with an opening, a constant pressure device for keeping the air pressure in the container constant and an air flow meter for measuring the flow of gas entering the container are connected to the openings, an outlet end of the container is connected with an output pump, and an output end of the output pump is connected with a mixer for mixing the two or more groups of viscous liquid; the output pump and the gas flowmeter are also respectively connected with a computing unit.

2. A viscous liquid proportioning device of claim 1, wherein the container is a thermostatic glue barrel.

3. A viscous liquid proportioning device according to claim 1, wherein the output pump is a gear pump.

4. A viscous liquid proportioning device according to claim 1, wherein the output pump is in communication with the container via an output conduit.

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