CN210187098U - Material conveying device - Google Patents

Abstract

The utility model discloses a material conveying device, which comprises a pump; the weighing unit is used for detecting the reduction amount of the mass of the material; a container disposed on the weighing unit for containing a material; one end of the pipeline extends into the material in the container, and the other end of the pipeline is communicated with the pump; and the speed regulating unit is used for regulating the rotating speed of the pump. The utility model has the advantages of the transport precision is high, response time is short.

Description

Material conveying device

Technical Field

The utility model relates to a fluid conveying especially relates to material conveying device.

Background

For the chemical reaction between liquid and liquid, two or more materials are generally mixed according to a certain proportion and react under certain conditions such as pressure and temperature. The proportion of the materials is generally controlled by a pump or a flow meter, and the pump generally adopts a peristaltic pump, a plunger pump, a gear pump or other pumps capable of metering; the flow meters generally comprise orifice plate flow meters, laminar flow mass flow meters, turbine flow meters, vortex flow meters, electromagnetic flow meters, rotor flow meters, ultrasonic flow meters, elliptic gear flow meters and the like, when the flow rate is large, the flow meters can meet the control requirement of the flow rate, but when the flow rate is low to a certain degree, the requirement is difficult to meet; in recent years, new ways have been developed for high-precision stable delivery, particularly small-flow delivery, including improving the precision of pumps, small-volume flow meters, and the like, but from the viewpoint of cost performance, the higher the precision of pumps, the higher the cost; small volume flowmeters are expensive to obtain with a small volume flow on the one hand and susceptible to material properties such as particulate matter, crystallization, corrosivity, etc. on the other hand, and are therefore not ideal ways to solve this problem.

The problem that the pump line to the pump use ages, blocks up and lead to, realizes through the parameter of adjusting the pump to the peristaltic pump as an example, when the pump line of pump is ageing, because extrusion shrinkage can descend, lead to the pump head once to the pump line extrusion, actual flow can be less than the flow of new pump line, the accessible accelerates the rotational speed of pump to realize, but in order to realize improving the threely speed that reaches the settlement of pump, needs a plurality of conditions: a. a current speed; b. the required rotational speed; the required rotation speed is generally related to material properties including viscosity, density, etc. When a pump or a pipeline is blocked, the pressure is possibly increased and the flow rate is reduced due to the fact that the sectional area is reduced; in order to obtain the corresponding flow, the same method is adopted, except that the larger the blockage degree is, the larger the pressure is, and the pressure resistance of the pipeline and the like is limited, so when the blockage is not serious, the flow rate can be realized by increasing the rotating speed of the pump, but when the blockage degree is certain, if the rotating speed is continuously increased, dangerous situations such as pipe explosion and the like can be caused, particularly materials with corrosiveness and reactivity are needed, and even the situation is that the rotating speed is not only needed to be known, but also an acceptable rotating speed range is needed to be known.

Because the influence of blockage and aging on the flow rate has certain randomness, the traditional solution to the problem is generally solved through pressure detection and flow calibration, but two problems exist: 1) the flow rate is changed in real time, and the traditional method has hysteresis; 2) even if the blockage is known, no better method is available except for maintenance; 3) potential safety hazards exist. The present method provides a solution to the above problems.

In addition, in a chemical reaction, a process is generally needed from starting up a pump to obtaining a stable flow rate, and in the stage, because the proportion of materials is not according to the designed flow rate, the by-products of the reaction are more, the abundance of the composition is inconsistent, and the product quality is abnormal, so that the part is required to be removed, which is called 'pinching head'; for research laboratories or pilot plants, the "pinching" causes a lot of waste, due to the large number of such cases, especially when the material costs are very high.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies existing in the prior art, the utility model provides a material conveying device with high conveying precision and short response time.

The utility model discloses a utility model purpose can realize through following technical scheme:

a material delivery device comprising a pump; the material conveying device further comprises:

the weighing unit is used for detecting the reduction amount of the mass of the material;

a container disposed on the weighing unit for containing a material;

one end of the pipeline extends into the material in the container, and the other end of the pipeline is communicated with the pump;

and the speed regulating unit is used for regulating the rotating speed of the pump.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the problems of pump pipe aging, pipeline or pump blockage and the like can be self-adapted, high-precision stable continuous conveying of the pump is obtained, and the flow speed deviation is less than 0.1%;

2. the mass flow is not influenced by the material properties;

3. the response time is short, and the time for reaching the flow stability is only 15 percent of that in the prior art;

4. the pump can be suitable for various pump types, such as peristaltic pumps, plunger pumps, gear pumps and the like;

5. according to different conveying precision, mass measuring devices with different precision can be equipped;

6. and data sharing is realized, and the control of a single pump is further optimized.

Drawings

The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only intended to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. In the figure:

fig. 1 is a schematic structural diagram of a material conveying device according to an embodiment of the present invention.

Detailed Description

Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or substitutions from these embodiments that will be within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.

Example 1:

fig. 1 schematically shows a schematic structural diagram of a material conveying device according to an embodiment of the present invention, and as shown in fig. 1, the material conveying device includes:

the weighing unit is used for detecting the reduction amount of the mass of the material, such as electronic scales with different precisions;

a container disposed on the weighing unit for containing a material;

one end of the pipeline extends into the material in the container, and the other end of the pipeline is communicated with the pump;

the speed regulating unit is used for regulating the rotating speed of the pump; the speed regulating unit is the prior art in the field, and the specific structure and the working mode are not described in detail herein.

In order to store the preset flow-rotation speed correspondence relationship, the material conveying device further comprises:

a memory;

a display for displaying information within the memory; the rotating speed corresponding to the flow requirement of the material to be conveyed is obtained by calling the storage information of the same type as the material to be conveyed, so that the rotating speed of the pump is directly adjusted to the rotating speed, and the response time is shortened.

Example 2:

use of a pump according to embodiment 1 of the invention in a peristaltic pump.

In the application example, the pump adopts a peristaltic pump; the corresponding relation between different flow rates and rotating speeds of different materials is stored in the memory;

during the operation of the pump, if the property of the material to be conveyed corresponds to the information stored in the memory, the information in the memory is directly called, so that the rotating speed corresponding to the flow requirement of the material to be conveyed is obtained; otherwise, the combination of the electronic scale and the container is used for adjusting the rotating speed of the pump, so that the flow meeting the flow requirement is obtained; the method specifically comprises the following steps:

the container containing the material to be conveyed is arranged on an electronic scale, and the flow rate is obtained by reducing the indicated number delta A of the electronic scale and the working time t of the pump

The speed regulating unit is used for regulating the rotating speed of the pump to ensure that the flow rate

The flow requirement is met.

The above embodiments are only given by way of example to the case of using a peristaltic pump, but other types of pumps, such as a plunger pump or a gear pump, are also possible, and the specific embodiment is the same as the above embodiments.

Claims (4)

1. A material delivery device comprising a pump; the material conveying device further comprises:

the weighing unit is used for detecting the reduction amount of the mass of the material;

a container disposed on the weighing unit for containing a material;

one end of the pipeline extends into the material in the container, and the other end of the pipeline is communicated with the pump;

and the speed regulating unit is used for regulating the rotating speed of the pump.

2. The material transfer device of claim 1, wherein: the material conveying device further comprises:

a memory;

a display for displaying information within the memory.

3. The material transfer device of claim 1, wherein: the weighing unit is an electronic scale.

4. The material transfer device of claim 1, wherein: the pump is a peristaltic pump, a plunger pump or a gear pump.

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