RU100239U1 - DEVICE FOR MEASURING WEIGHT IN A CARGO CONTAINER - Google Patents

Abstract

 1. A device for measuring the weight in the hopper, containing installed on the perimeter of the hopper and mounted in its support force measuring sensors connected to the input of the controller, which sequentially polls all load sensors and displays the summed value if the summed value differs from the latter by an amount , exceeding the measurement error, is recorded in the built-in memory along with the measurement time. ! 2. The device according to claim 1, characterized in that the summed current value is transmitted to the central controller. ! 3. The device according to claim 1, characterized in that a removable element is installed coaxially with each load cell, which is replaced when calibrating the sensor with a calibration sensor.

Description

The utility model relates to devices for weighing bulk goods.

Known devices for weighing bulk cargo (RU13258 U1, RU2042118 C1).

The closest in technical essence is RU2119648 C1, containing load cells mounted around the perimeter of the hopper, connected to the input of the controller.

However, the operation of this device is time-consuming and does not provide the required accuracy, since calibration of such sensors requires loading and unloading the container with control weights or control weight of material, which is very difficult.

The proposed device allows for verification procedure in accordance with the requirements of the law on ensuring the uniformity of measurements without stopping the storage of materials.

The objective of the utility model is to simplify the weighing process, verification procedures and increase the accuracy of weighing.

The task is achieved due to the fact that the device for measuring weight in the hopper contains installed on the perimeter of the hopper and mounted in its support force measuring sensors connected to the input of the controller, which alternately polls all load sensors and displays the summed value on a digital indicator in case if the summed value differs from the last one by an amount exceeding the measurement error, the record is made in the internal memory along with the measurement time .

The claimed technical solution is illustrated by drawings, which depict:

Figure 1 General view of the receiving hopper (silo).

In figure 2, the load cell is a removable element / calibration sensor.

In Fig.3, Section 1-1 in Fig.2. Section of the hopper support at the installation site of the removable element.

Figure 4 The scheme of operation of the weighing device.

In the drawings indicated:

Figure 1

1 - hopper with a capacity of 15 ... 50 tons of bulk materials.

2 - support.

3 - metal block body with load cell weight sensor.

4/10 - removable element / calibration sensor.

5 - plate.

6 - screw (jack).

Figure 2

2 - the upper part of the support.

5 - plate.

6 - screw (jack).

7 - the upper part of the metal casing of the block with a load cell.

8 - the lower part of the metal casing of the block with a load cell.

9 - load sensor.

10 - calibration sensor.

11 - a through hole in the plate.

12 - nut.

Figure 3 Section 1-1 in figure 2.

4 - removable element.

5 - plate.

6 - screw (jack).

10 - calibration sensor.

Figure 4 Scheme of movement and weighing of material.

9 - (D1 ... D4) load cell weight sensors.

13 - "QI" digital indicator

14 - "VKS" weight silo controller.

The claimed technical solution allows the operation to verify and calibrate the load sensors, at any time during operation of the load receptor (hopper, silo) without dismantling them.

The principle of operation is based on measuring the weight in the hopper 1 mounted on supports 2 located around the perimeter of the hopper 1, in which load cells 9 (D1, D2, D3, D4) are mounted. A load, for example, cement from a cement truck, is loaded into the hopper and unloaded, for example, for production purposes. The outputs of the sensors 9 (D1, D2, D3, D4) are connected to the inputs of the VKS controller, which contains the sensor polling unit, sequentially polls all the load cells 9 (D1, D2, D3, D4) and the summed value displays a digital indicator if the current the summed value exceeds the last measured by 50 kg, which is set in the comparison unit, the record is made in the built-in memory along with the measurement time. When using the scale controller, the current value can be transmitted to the RS-485 network.

Preparation of the device for operation is as follows.

When installing force sensors, the support is divided into the upper part and the lower part. The upper part of each silo support is connected with studs 6 (FIGS. 1, 2) to the lower part of the support. In the interval between the upper part of the support and the lower one, a block is installed in which a coaxial force measuring sensor 9 (Figs. 1, 2) is placed, which detects the force from the weight of the silo transmitted by the upper part of the support to the lower part of the support, and a removable element 4/10 (Fig. 1), which is replaced during calibration by the calibration sensor 10 (Fig.2). A compressive load simulating pressure from the weight of cement is created by crimping a unit including a force sensor 9 (Fig. 1, 2) and a calibration sensor 10 (Fig. 2). Both elements of the block: the load cell and the calibration sensor are affected by the same compressive load. The readings of the calibration device are compared with the readings of the weighing device and calibration is performed.

A sequential calibration of each load sensor 9 is carried out separately, for which instead of a removable element 4, coaxial to one of the sensors 9, the calibration sensor 10 is temporarily installed and the sensor 9 and the calibration sensor 10 are loaded together with screw jacks 6, and their readings are compared. In the same way, all sensors installed on the hopper are calibrated sequentially

Each sensor 9 is loaded together with a calibration sensor 10, monitoring their readings at points of 1000, 5000, 10000, 25000 and 50,000 kg. Upon reaching a weight of 50,000 kg, the loading is stopped and after 10-15 minutes the device is unloaded, monitoring the readings of sensors 9 and sensors 10 at the same points. The results are recorded in the protocol of materials.

For each measurement result, the absolute error of the weight measurement should be calculated, which should not exceed ± 50 kg in the range up to 25,000 kg and ± 100 kg in the range from 25,000 kg to 50,000 kg.

After that, the device is ready to receive bulk cargo.

The proposed utility model simplifies and improves the accuracy of weighing bulk cargo.

Claims (3)

1. A device for measuring the weight in the hopper, containing installed on the perimeter of the hopper and mounted in its support force measuring sensors connected to the input of the controller, which sequentially polls all load sensors and displays the summed value if the summed value differs from the latter by an amount , exceeding the measurement error, is recorded in the built-in memory along with the measurement time. 2. The device according to claim 1, characterized in that the summed current value is transmitted to the central controller. 3. The device according to claim 1, characterized in that a removable element is installed coaxially with each load cell, which is replaced when calibrating the sensor with a calibration sensor.