Abrasive powder granularity on-line monitoring and automatic sampling device

Abstract

The invention discloses an automatic sampling device for on-line monitoring of ground powder granularity, and relates to the field of carbon material powder preparation and testing, the automatic sampling device comprises a motor, a sampling tube, a screw rod and a first hoop; one end of the sampling tube is fixedly connected to the motor; the screw rod is located in the sampling tube, and one end of the screw rod is also fixedly connected to the motor; the sampling tube is connected with the motor connecting part; one end, close to the first hoop, of the sampling pipe is fixedly connected; the other end of the through pipe is connected with one end of the Venturi pipe; the other end of the Venturi tube is connected with one end of the three-way tube; the other two ends of the Venturi tube are respectively connected with a compressed air tube and a material tube; the compressed air generates negative pressure through the Venturi tube, so that material sampling is facilitated, the sampling efficiency is improved, and the sampled material is ensured to meet the concentration required by sample testing; the device adopts the motor as a power source, and the sampling tube and the screw are driven to rotate through the motor, so that the sampling accuracy and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the field of carbon material powder preparation and testing, and in particular to an automatic sampling device for online monitoring of grinding particle size. Background Art

[0002] Grinding mill is a commonly used equipment for the preparation of carbon materials. Grinding mill is used in the production of common carbon materials such as isostatic graphite, graphite electrode, and carbon anode for aluminum. Grinding mills are usually used to produce isostatic graphite. There are vertical mills, Raymond mills, and airflow mills. Grinding is the process of processing granular raw materials into powder. It is usually the first step in the production of carbon materials. The grinding particle size is one of the key factors in the production formula of carbon materials. It will have an important impact on the performance indicators of the final product. Therefore, in the actual grinding production, controlling the particle size of the powder is of great significance to the processing and production of carbon materials. Usually, the powder is tested. The material particle size method is to take samples manually and send them to the laboratory for particle size detection. This method has obvious lag, so the online dry method has high efficiency and high sensitivity, making it widely favored by carbon manufacturers; and the sampling position of the dry online test particle size analyzer is usually inserted into the air duct in front of the dust collector for sampling, but the sampling at the air duct is greatly affected by factors such as negative pressure and material, and the fluctuation is large; the powder particle size collected by the cyclone dust collector and the bag dust collector is quite different, so the invention of a device to take samples on the spiral after the dust collector can ensure the uniformity and representativeness of the sampling. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an automatic sampling device for online monitoring of grinding particle size.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] The present application provides an automatic sampling device for online monitoring of grinding particle size, comprising a motor, a sampling tube, a screw, and a first clamp; one end of the sampling tube is fixedly connected to the motor; the screw is located inside the sampling tube, and one end of the screw is also fixedly connected to the motor; the connection part between the sampling tube and the motor is connected by a rubber gasket and a first clamp; one end of the sampling tube close to the first clamp is fixedly connected with a rubber gasket and a second clamp; one end of a through pipe is fixedly connected to the middle of the first clamp and the second clamp; the other end of the through pipe is connected to one end of a Venturi tube through the rubber gasket and the third clamp; the other end of the Venturi tube is connected to one end of a three-way pipe through the rubber gasket and the fourth clamp; the other two ends of the Venturi tube are connected to a compressed air pipe and a material pipe through a rubber gasket, a fifth clamp and a sixth clamp, respectively.

[0006] Furthermore, a row of sampling ports is provided on the outer wall of the sampling tube at one end away from the motor.

[0007] Furthermore, one end of the material pipe away from the three-way pipe is connected to a dry particle size testing instrument.

[0008] Furthermore, the other end of the compressed air pipe is connected to an air compressor.

[0009] Furthermore, the second clamp is fixedly connected to the outer wall of the dust collector discharge port.

[0010] Furthermore, one end of the sampling tube away from the second clamp is located in the dry particle size testing instrument.

[0011] The beneficial effects of the present invention are:

[0012] 1) Because there is a screw inside the sampling tube, both are fixedly connected to the motor. The rotation of the screw helps to advance and sample the material, thereby improving the accuracy and efficiency of sampling; because the end of the material tube away from the three-way pipe is directly connected to the dry particle size tester, the material after sampling is quickly and uninterruptedly transmitted, avoiding contamination and errors caused by material transfer.

[0013] 2) Because the other end of the compressed air pipe is connected to an air compressor, a stable air source is provided for the air compressor, ensuring the normal operation of pneumatic components such as the Venturi tube. The stable compressed air supply can enhance the negative pressure effect of the Venturi tube, thereby improving the sampling efficiency and ensuring the smooth progress of the sampling process.

[0014] 3) Because the installation position of the whole sampling device is at the discharge port of the screw conveyor or the dust collector, the sample can be fully mixed in the spiral or the dust collector spiral, so compared with the sampling test in the mill air duct, the test sample obtained by this device at the discharge port has better uniformity and representativeness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A stereoscopic diagram of an automatic sampling device for online monitoring of grinding particle size;

[0016] In the figure, 1-motor, 2-sampling tube, 3-screw, 4-feed port, 5-through pipe, 6-Venturi tube, 7-tee pipe, 8-compressed air pipe, 9-material pipe, 10-first clamp, 11-second clamp, 12-third clamp, 13-fourth clamp, 14-fifth clamp, 15-sixth clamp, 16-bolt. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , the present invention provides a technical solution:

[0019] An automatic sampling device for online monitoring of grinding particle size, characterized in that it comprises a motor 1, a sampling tube 2, a screw 3, and a first clamp 10; one end of the sampling tube 2 is fixedly connected to the motor 1; the screw 3 is located inside the sampling tube 2, and one end of the screw 3 is also fixedly connected to the motor 1; the connection between the sampling tube 2 and the motor 1 is connected to the first clamp 10 by a rubber gasket; one end of the sampling tube 2 close to the first clamp 10 is fixedly connected to a rubber gasket and a second clamp 11; one end of a through pipe 5 is fixedly connected to the middle of the first clamp 10 and the second clamp 11; the other end of the through pipe 5 is connected to one end of a venturi tube 6 through the rubber gasket and the third clamp 12; the other end of the venturi tube 6 is connected to one end of a three-way pipe 7 through the rubber gasket and the fourth clamp 13; the other two ends of the venturi tube 6 are connected to a compressed air pipe 8 and a material pipe 9 through a rubber gasket and a fifth clamp 14 and a sixth clamp 15 respectively. Among them, the device uses a motor 1 as a power source, and the motor 1 drives the rotation of the sampling tube 2 and the screw 3, making the sampling process faster and continuous, greatly improving the sampling efficiency, and realizing the automation and continuity of the sampling process. The sampling tube 2 is provided with a screw 3 inside, and both are fixedly connected to the motor. The rotation of the screw 3 helps to advance and sample the material, and improves the accuracy and efficiency of sampling. The connection between the sampling tube 2 and the motor 1, the venturi tube 6, the three-way tube 7 and other components adopts a clamp and a rubber gasket to ensure the sealing and stability of the connection, effectively prevent material leakage, and improve the sealing performance of the device. As a pneumatic component, the venturi tube 6 uses the throttling effect of the fluid to generate negative pressure to stably absorb the material, reduce the error in the sampling process, and ensure the accuracy of the sampling. The three-way tube 7 is used to connect the compressed air pipe 8, the material pipe 9 and the venturi tube 6 to realize the separation and transmission of the gas-solid two-phase flow. The automated sampling process reduces manual operation, reduces the labor intensity of operators, and improves work efficiency. Through the online monitoring automatic sampling device, the grinding particle size can be monitored in real time, and the production process can be adjusted in time according to the monitoring results to ensure the stability of product quality.

[0020] A row of injection ports 4 are provided on the outer wall of the sampling tube 2 away from the motor 1. The injection ports 4 can realize multi-point sampling to increase the representativeness of the sampling and reduce the error caused by single-point sampling. Multi-point sampling can more comprehensively reflect the particle size distribution of the material at different positions, thereby improving the accuracy of the particle size test.

[0021] The end of the material pipe 9 away from the three-way pipe 7 is connected to the dry particle size tester. The end of the material pipe 9 away from the three-way pipe 7 is directly connected to the dry particle size tester, which realizes the rapid and uninterrupted transmission of the material after sampling, avoiding the pollution and error caused by the material transfer. This configuration enables the dry particle size tester to receive and process the sampled material in real time, realize the real-time monitoring of the particle size distribution, and help to adjust the production process in time.

[0022] The other end of the compressed air pipe 8 is connected to an air compressor. The other end of the compressed air pipe 8 is connected to an air compressor, which provides a stable air source for the air compressor, ensuring the normal operation of pneumatic components such as the venturi tube 6 and the stable compressed air supply can enhance the negative pressure effect of the venturi tube 6, thereby improving the sampling efficiency and ensuring the smooth progress of the sampling process.

[0023] The second clamp 11 is fixedly connected to the outer wall of the dust collector discharge port. The second clamp 11 is fixedly connected to the outer wall of the dust collector discharge port, ensuring the sealing between the sampling tube 2 and the dust collector, preventing leakage and contamination of materials during the sampling process. This connection method also improves the safety of the equipment and avoids safety accidents that may be caused by material leakage.

[0024] The end of the sampling tube 2 away from the second clamp 11 is located in the dry particle size test instrument. The end of the sampling tube 2 away from the second clamp 11 is located in the dry particle size test instrument, so that the sampled material can directly and accurately enter the test instrument, reducing the error caused by material transfer and processing. This design realizes the integration of sampling and testing, simplifies the operation process, and improves work efficiency.

[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "setting", "installation", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. An automatic sampling device for online monitoring of grinding particle size, characterized in that: The invention comprises a motor (1), a sampling tube (2), a screw (3), and a first clamp (10); one end of the sampling tube (2) is fixedly connected to the motor (1); the screw (3) is located inside the sampling tube (2), and one end of the screw (3) is also fixedly connected to the motor (1); the connection portion between the sampling tube (2) and the motor (1) is connected to the first clamp (10) by a rubber gasket; the end of the sampling tube (2) close to the first clamp (10) is fixedly connected to the rubber gasket and the second clamp (10); 1); one end of a through pipe (5) is fixedly connected to the middle of the first clamp (10) and the second clamp (11); the other end of the through pipe (5) is connected to one end of a venturi tube (6) through the rubber gasket and the third clamp (12); the other end of the venturi tube (6) is connected to one end of a three-way pipe through the rubber gasket and the fourth clamp (13); the other two ends of the venturi tube (6) are connected to a compressed air pipe (8) and a material pipe (9) through rubber gaskets and the fifth clamp (14) and the sixth clamp (15).

2. The automatic sampling device for online monitoring of grinding particle size according to claim 1 is characterized in that: A row of sampling ports (4) is provided on the outer wall of the sampling tube (2) at one end away from the motor (1).

3. The automatic sampling device for online monitoring of grinding particle size according to claim 1 is characterized in that: One end of the material pipe (9) away from the three-way pipe (7) is connected to a dry particle size testing instrument.

4. The automatic sampling device for online monitoring of grinding particle size according to claim 1 is characterized in that: The other end of the compressed air pipe (8) is connected to an air compressor.

5. The automatic sampling device for online monitoring of grinding particle size according to claim 1 is characterized in that: The second clamp (11) is fixedly connected to the outer wall of the dust collector discharge port.

6. The automatic sampling device for online monitoring of grinding particle size according to claim 1 is characterized in that: One end of the sampling tube (2) away from the second clamp (11) is located in the dry particle size testing instrument.

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