Wide-range material weighing system

Abstract

The utility model discloses a wide-range material weighing system, which is used for weighing powder or / and granules easy to be affected with damp and comprises a material barrel, a feeding port with a sealing cover is arranged at the top of the material barrel, and a first discharging device and a second discharging device are arranged at a discharging port of the material barrel. The measuring range of the first discharger is smaller than that of the second discharger; the lower part of the material barrel is provided with a gas introducing part for introducing dry gas into the material barrel, and the upper part of the material barrel is provided with an exhaust part communicated with the upper part in the material barrel; the position of the dry gas entering the charging basket is lower than the position of the charging basket for discharging the gas; the material weighing system provided by the utility model is suitable for weighing powder or / and granules which are easily affected with damp, and the material weighing system can improve the dryness in the dry material barrel in a manner of introducing dry gas into the material barrel and exhausting the gas, so that the influence of humidity on the powder when the material barrel is empty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of powder weighing, and specifically relates to a wide-range material weighing system. Background Art

[0002] The powdery materials that are prone to moisture absorption can easily absorb moisture in the air and get damp. Therefore, when weighing such powdery materials, they need to be quickly put into a dry bucket and quickly weighed and discharged. Traditional weighing equipment generally includes a bucket, and a feeder with a weighing function is arranged at the discharge port of the bucket. However, during use, the bucket cannot be guaranteed to be completely dry in a general environment. Therefore, after putting the moisture-prone powdery materials into the bucket, there is a situation where the powdery materials absorb moisture in the air inside the bucket and get damp. At the same time, in order to achieve rapid weighing of the feeder, the discharging speed of the feeder is increased, but the disadvantage is that it is difficult to control the accuracy. Content of the Utility Model

[0003] Therefore, in order to solve the above deficiencies, the present utility model provides a weighing system applicable to moisture-prone powdery materials or / and granular materials. By means of introducing dry gas into the bucket and exhausting gas, the dryness inside the dry bucket can be improved, thereby reducing the influence of the humidity inside the bucket on the powdery materials when the bucket is empty.

[0004] Specifically, a wide-range material weighing system is used for weighing moisture-prone powdery materials or / and granular materials. The system includes a bucket, and a feeding port with a sealed cover is opened at the top of the bucket. A first discharger and a second discharger are arranged at the discharge port of the bucket, and the measuring range of the first discharger is smaller than that of the second discharger;

[0005] A gas inlet part for introducing dry gas into the bucket is arranged at the lower part of the bucket, and an exhaust component communicating with the upper part inside the bucket is arranged at the upper part of the bucket;

[0006] The height of the position where the dry gas enters the bucket is lower than the height of the position where the gas is discharged from the bucket.

[0007] Preferably, both the first discharger and the second discharger are screw conveyors.

[0008] Furthermore, the bucket is provided with a bracket, and the first discharger and the second discharger are fixedly installed on the bracket and are located below the discharge port;

[0009] A gravity sensor acting on the bucket is installed on the bracket.

[0010] Furthermore, the exhaust component includes a suction fan. The air inlet of the suction fan is communicated with the upper part inside the bucket through a pipeline, and the air outlet of the suction fan is communicated with an external tail gas treatment device.

[0011] Furthermore, a filter is provided at the air inlet end of the pipeline.

[0012] The utility model has the following advantages:

[0013] The wide-range material weighing system of the utility model is suitable for weighing powders and / or granular materials that are susceptible to moisture. The weighing system can increase the dryness in the dry material barrel by introducing dry gas into the barrel and exhausting the gas, thereby reducing the influence of humidity in the barrel on the powder when it is empty.

[0014] By using two feeders with different measuring ranges, the feeding accuracy can be controlled, the feeding speed can be increased, the contact time between the material and the air during the feeding process (the process of the material entering the material bag from the discharge port of the feeder) can be reduced, and the risk of moisture can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main view of the wide-range material weighing system of the utility model;

[0016] Figure 2 It is a side view schematic diagram of the wide range material weighing system of the utility model;

[0017] Figure 3 It is a bottom view schematic diagram of the wide range material weighing system of the utility model;

[0018] Figure 4 It is a schematic diagram of the main view of the material barrel of the utility model;

[0019] Figure 5 It is a side view schematic diagram of the material barrel of the utility model;

[0020] In the figure: 1. material barrel; 2. bracket; 3. tee; 4. second discharger; 5. first discharger; 6. second bag clamp; 7. first bag clamp; 8. second weighing module; 9. first weighing module; 10. suction fan; 11. gas inlet. DETAILED DESCRIPTION

[0021] The following will be combined with the attached Figures 1 - 5 The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] As described in the background technology, powders that are susceptible to moisture can easily absorb moisture in the air and become damp, so when weighing the powder, it is necessary to quickly put it into a dry barrel, and quickly complete the weighing and feeding. Traditional weighing equipment generally includes a barrel, and a feeder with a weighing function is set at the outlet of the barrel. During use, the barrel cannot be completely dry under normal conditions, so after the powder that is susceptible to moisture is added to the barrel, the powder may absorb moisture in the air in the barrel and become damp; at the same time, in order to achieve rapid weighing of the feeder, the feeding speed of the feeder will be increased, but the disadvantage is that the accuracy is difficult to control.

[0023] Based on the above problems, the utility model provides a wide-range material weighing system, which is used for weighing powders and / or granular materials that are susceptible to moisture, such as Figures 1 - 3 As shown, the system includes a barrel 1, a feeding port with a sealed cover is opened on the top of the barrel 1, a first discharger 5 and a second discharger 4 are installed at the discharge port of the barrel 1 through a tee 3, and the measuring range of the first discharger 5 is smaller than the measuring range of the second discharger 4;

[0024] The lower part of the barrel is provided with a gas inlet 11 for introducing dry gas into the barrel, and the upper part of the barrel is provided with an exhaust component connected to the upper part of the barrel;

[0025] The height of the position where the drying gas enters the barrel is lower than the height of the position where the gas is discharged from the barrel.

[0026] The above-mentioned technical features can realize fast feeding over a wide range and reduce the risk of moisture in the powder. When in use, firstly, dry air is introduced into the bottom of the barrel, and at the same time, the exhaust component is opened, and the flow of dry air in the barrel is used to remove the moist air in the barrel and improve the dryness in the barrel. Then, the powder is put into the barrel through the feeding port, and the sealing cover is closed after the feeding is completed. During the weighing process, the material enters the first discharging device and the second discharging device from the material barrel, and enters the packaging bag after being measured by the first discharging device and / or the second discharging device. Since the measuring range of the first discharging device is smaller than that of the second discharging device, a wide range and fast unloading can be realized. During weighing, the second discharging device with a large range and the first discharging device with a small range discharge materials quickly at the same time. When the precision control value is reached, the discharging speed of the second discharging device with a large range is reduced or even stopped, and the first discharging device with a small range is used to control the final residue, thereby realizing a wide range and fast weighing.

[0027] In order to improve the discharging accuracy of the discharging device, in one embodiment, the first discharging device and the second discharging device are both screw conveyors, in order to achieve a measuring range of 100g-50Kg for the entire weighing system, wherein the effective measuring range of the first discharging device with a small measuring range is 20g-2000g, and the effective measuring range of the second discharging device with a large measuring range is 1kg-80kg.

[0028] In order to ensure the stability of the entire system and the input amount of materials in the metering bucket, in one embodiment, the bucket is provided with a bracket 2, and the first discharge device and the second discharge device are fixedly installed on the bracket and are located below the discharge port;

[0029] A gravity sensor acting on the bucket is installed on the bracket.

[0030] Among the above technical features, the stability of the entire system can be improved through the bracket, and the metering of the materials in the material bucket can be realized by installing the gravity sensor.

[0031] In order to better exhaust the air in the bucket, in one embodiment, the exhaust component includes a suction fan. The air inlet of the suction fan is connected to the upper part inside the bucket through a pipeline, and the air outlet of the suction fan is connected to an external tail gas treatment device. Through the action of the suction fan, the air in the bucket is exhausted. By cooperating the suction fan with the input of dry air, the flow of dry air is formed in the bucket, thereby reducing the humidity in the bucket. In order to prevent the objects in the bucket from entering the suction fan, in one embodiment, a filter element is provided at the air inlet end of the pipeline.

[0032] In order to better weigh the materials discharged from the first discharge device and the second discharge device into the packaging bag, a first weighing module 9 and a second weighing module 8 acting on the packaging bag are respectively installed below the first discharge device and the second discharge device. In order to better install the packaging bag at the discharge port of the first discharge device or the second discharge device, a first bag clamping device 7 and a second bag clamping device 6 are respectively installed at the discharge ports of the first discharge device and the second discharge device. The first bag clamping device and the second bag clamping device adopt existing equipment.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wide-range material weighing system, characterized in that: It includes a feed hopper. A feeding opening with a sealed cover is provided at the top of the feed hopper. A first discharger and a second discharger are arranged at the discharge opening of the feed hopper, and the measuring range of the first discharger is less than that of the second discharger. A gas inlet part for introducing dry gas into the feed hopper is provided at the lower part of the feed hopper, and an exhaust component communicating with the upper part inside the feed hopper is provided at the upper part of the feed hopper. The height of the position where the dry gas enters the feed hopper is lower than the height of the position where the gas is discharged from the feed hopper.

2. The wide-range material weighing system according to claim 1, wherein: Both the first discharger and the second discharger are screw conveyors.

3. The wide-range material weighing system according to claim 1, wherein: The feed hopper is provided with a bracket. The first discharger and the second discharger are fixedly installed on the bracket and are below the discharge opening. A gravity sensor acting on the feed hopper is installed on the bracket.

4. The wide-range material weighing system according to claim 1, wherein: The exhaust component includes a suction fan. The air inlet of the suction fan is communicated with the upper part inside the feed hopper through a pipeline, and the air outlet of the suction fan is communicated with an external tail gas treatment device.

5. The wide-range material weighing system according to claim 4, characterized in that: A filter element is provided at the air inlet end of the pipeline.

6. The wide-range material weighing system according to any one of claims 1-5, characterized in that: The material is a moisture-sensitive powder or / and granular material.

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