CN215726295U

CN215726295U - Automatic metering device

Info

Publication number: CN215726295U
Application number: CN202122164666.9U
Authority: CN
Inventors: 董延波
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-02-01
Anticipated expiration: 2031-09-08

Abstract

The utility model provides an automatic metering device, when powder, liquid and small granular objects are metered, the traditional weighing mechanism consisting of a sensor and a PLC is abandoned, materials in a stock bin are directly added into a metering tube, and the weight of the materials is calculated according to the density of the materials and the volume of the materials in the metering tube, so that the automatic metering device has the advantages of simple structure and low cost.

Description

Automatic metering device

Technical Field

The utility model belongs to the technical field of automatic metering equipment, and particularly relates to an automatic metering device.

Background

When the existing automatic metering device is used for metering powder, liquid and small granular objects, most of the existing automatic metering devices need a weighing mechanism consisting of a sensor and a PLC (programmable logic controller) for weighing, and the existing automatic metering device has the disadvantages of complex structure, high failure rate and higher cost; moreover, the general service environment of the automatic metering device is rather harsh, and sometimes even need to be used in the environment with large vibration, however, the metering error of the weighing mechanism composed of the sensor and the PLC is large in the vibration environment, which causes certain fluctuation of the product quality.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an automatic metering device with simple structure, low cost and high metering precision.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an automatic metering device, includes feed bin, metering tube and the unloading pipe that from the top down set gradually and communicate each other, is provided with first valve and the second valve of mutual independence between feed bin and the metering tube and between metering tube and the unloading pipe respectively, and first valve and second valve are connected to the PLC system through a actuating mechanism respectively, and the operating condition of first valve of PLC system through the actuating mechanism control that corresponds and second valve.

Further, the metering pipe is of a hollow structure, and the ratio of the maximum length of the cross section of the metering pipe to the height of the metering pipe is not less than 1/3.

Further, the cross-sectional shape of the metering tube includes, but is not limited to, circular, trapezoidal, and square.

Furthermore, the first valve and the second valve are both drawable gate plate structures.

Furthermore, the driving mechanism is a cylinder or a linear traveling mechanism consisting of a motor and a lead screw.

Furthermore, the upper side and the lower side of the first valve and the second valve are both provided with connecting flanges.

Further, the bottom of the storage bin is conical.

Furthermore, a delay module and a timing module are arranged in the PLC system.

Compared with the prior art, the utility model has the beneficial effects that: when powder, liquid and small granular objects are measured, the traditional weighing mechanism consisting of a sensor and a PLC (programmable logic controller) is abandoned, the materials in the bin are directly added into the measuring tube, and the weight of the materials is calculated according to the density of the materials and the volume of the materials in the measuring tube, so that the measuring device has the advantages of simple structure and low cost.

Drawings

FIG. 1 is a schematic diagram of an automatic metering device according to the present invention;

FIG. 2 is a control schematic of the present invention;

the labels in the figure are: 1. feed bin, 2, metering tube, 3, unloading pipe, 4, first valve, 5, second valve, 6, flange.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

The principle of the utility model is as follows: when powder, liquid and small granular objects are measured, the traditional weighing mechanism consisting of a sensor and a PLC is abandoned, the materials in the bin are directly added into the measuring pipe, and the weight of the materials is calculated according to the density of the materials and the volume of the materials in the measuring pipe, so that the utility model has the advantages of simple structure and low costMeterThe volume precision is higher, more is fit for using widely on a large scale.

The scheme of the utility model is as follows: the utility model provides an automatic metering device, as shown in fig. 1 and fig. 2, includes feed bin 1, metering tube 2 and unloading pipe 3 that from the top down set gradually and communicate each other, and wherein, the bottom of feed bin 1 is the toper, and metering tube 2 and unloading pipe 3 are hollow structure, and the bottom of unloading pipe 3 has the feed opening.

Be provided with mutually independent first valve 4 and second valve 5 between feed bin 1 and the measuring pipe 2 and between measuring pipe 2 and the unloading pipe 3 respectively, the upper and lower both sides of first valve 4 and second valve 5 both all are provided with flange 6, and is concrete, and the upper and lower both sides of first valve 4 are connected to feed bin 1 and measuring pipe 2 through flange 6 respectively, and the upper and lower both sides of second valve 5 are connected to measuring pipe 2 and unloading pipe 3 through flange 6 respectively. The first valve 4 and the second valve 5 are respectively connected to the PLC system through a driving mechanism, and the PLC system controls the working states of the first valve 4 and the second valve 5 through the corresponding driving mechanisms.

As a preferred embodiment of the present invention, the first valve 4 and the second valve 5 are both drawable gate structures, and the driving mechanism can respectively drive the first valve 4 and the second valve 5 to move along the horizontal direction, so as to control the connection and the disconnection between the storage bin 1 and the metering pipe 2 and between the metering pipe 2 and the discharging pipe 3, respectively. Furthermore, the driving mechanism is a cylinder or a linear traveling mechanism consisting of a motor and a lead screw.

When the volume of the material in the metering pipe 2 is obtained, the method is usually estimated according to the blanking time, namely the time for opening the first valve 4, and if the time for completely filling the metering pipe 2 is 10s, the blanking time is 5s, the volume of the material in the metering pipe can be estimated to be 1/2 of the total volume of the metering pipe, so that in order to avoid the influence of inconsistent blanking speed on estimation, the metering pipe 2 is designed to be of a thick and short structure, and therefore the error can be reduced to the minimum. Specifically, the ratio of the maximum length of the cross section of the metering tube to the height of the metering tube is not less than 1/3.

The PLC system is internally provided with a delay module and a timing module, and the opening time of the first valve and the opening time of the second valve are controlled through the delay module and the timing module, so that automatic metering and discharging are realized.

When the utility model is used for the first time, the use steps are as follows:

a. Firstly, calibrating the time required for completely filling the metering pipe 2 and the volume of the metering pipe, and inputting the data and the density of the material to be metered into a PLC system;

b. The PLC system reversely deduces the time t1 of single blanking according to the weight of the single required material;

c. The PLC system opens first valve 4 through corresponding actuating mechanism, and the material falls into in the measuring pipe 2 along the toper structure of feed bin 1 bottom, and simultaneously, the timing module begins work, and after the unloading, first valve 4 was closed, and second valve 5 is opened after the certain time (t 2) of delay, and the material falls down along unloading pipe 3, realizes the ejection of compact.

Certainly, the PLC system of the present invention may be externally connected with an HMI touch screen, and the time t1 for blanking is reversely deduced by inputting the weight of the required material on the HMI touch screen, so that the PLC system opens the first valve 4 and the second valve 5 through the corresponding driving mechanism to work, and blanking is performed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic metering device, characterized in that: the automatic feeding device comprises a storage bin, a metering pipe and a discharging pipe which are sequentially arranged from top to bottom and are mutually communicated, wherein a first valve and a second valve which are mutually independent are respectively arranged between the storage bin and the metering pipe and between the metering pipe and the discharging pipe, the first valve and the second valve are respectively connected to a PLC system through a driving mechanism, and the PLC system controls the working state of the first valve and the second valve through corresponding driving mechanisms.

2. An automatic metering device according to claim 1, characterized in that: the metering pipe is of a hollow structure, and the ratio of the maximum length of the cross section of the metering pipe to the height of the metering pipe is not less than 1/3.

3. An automatic metering device according to claim 2, characterized in that: the cross-sectional shape of the metering tube includes, but is not limited to, circular, trapezoidal, and square.

4. An automatic metering device according to claim 1, characterized in that: the first valve and the second valve are both drawable gate plate structures.

5. An automatic metering device according to claim 4, characterized in that: the driving mechanism is a cylinder or a linear traveling mechanism consisting of a motor and a lead screw.

6. An automatic metering device according to claim 1, characterized in that: and the upper side and the lower side of the first valve and the second valve are both provided with connecting flanges.

7. An automatic metering device according to claim 1, characterized in that: the bottom of the storage bin is conical.

8. An automatic metering device according to claim 1, characterized in that: and a delay module and a timing module are arranged in the PLC system.