Continuous and automatic calcium hydroxide sampling device and sampling method thereof

Abstract

The invention discloses a calcium hydroxide continuous automatic sampling device and a sampling method thereof, and relates to the technical field of automatic control, the device comprises an automatic sampling system, an automatic control system and a calcium hydroxide automatic collection system; the automatic sampling system comprises a three-way pipeline and a pneumatic angle seat valve; the three-way pipeline comprises a feeding hole, a warehousing hole and a sampling hole; the pneumatic angle seat valve is used for opening and closing the sampling port; the automatic control system comprises a pressure sensing subsystem and a time control subsystem and is used for controlling the state of the pneumatic angle seat valve; the state comprises an opening state and a closing state; the automatic calcium hydroxide collecting system comprises a tray, an asynchronous motor and a plurality of receiving funnels; the material receiving funnel is arranged on the tray and is used for collecting calcium hydroxide discharged from the sampling opening; the asynchronous motor is used for rotating the tray. According to the invention, continuous and automatic sampling of calcium hydroxide can be realized, and the sampling efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the field of automatic control technology, and in particular to a continuous automatic calcium hydroxide sampling device and a sampling method thereof. Background Art

[0002] Desulfurization is a critical step in the production process of aluminum electrolytic plants. By removing sulfides, the SO2 content in exhaust gas is reduced, minimizing environmental pollution. Generally, aluminum electrolytic plants use calcium hydroxide to remove sulfides generated during production, resulting in a high demand for calcium hydroxide. However, bulk procurement from a single calcium hydroxide manufacturer is extremely difficult, with multiple suppliers and varying quality.

[0003] Currently, the primary method for calcium hydroxide quality inspection is manual sampling, which lacks representativeness and presents quality risks. Furthermore, a two-person sampling team must frequently travel between three electrolysis and 12 purification workshops, sometimes working in shifts. This results in low efficiency and high material costs. Summary of the Invention

[0004] The purpose of this application is to provide a continuous automatic sampling device for calcium hydroxide and a sampling method thereof, which can realize continuous automatic sampling of calcium hydroxide and improve sampling efficiency and accuracy.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a continuous automatic sampling device for calcium hydroxide, comprising: an automatic sampling system, an automatic control system, and an automatic calcium hydroxide collection system;

[0007] The automatic sampling system includes a three-way pipe and a pneumatic angle seat valve; the three-way pipe includes a feed port, a warehouse port and a sampling port; the pneumatic angle seat valve is used to open and close the sampling port;

[0008] The automatic control system includes a pressure sensing subsystem and a time control subsystem, which are used to control the state of the pneumatic angle seat valve; the state includes an open state and a closed state;

[0009] The automatic calcium hydroxide collection system includes a tray, an asynchronous motor and a plurality of receiving funnels; the receiving funnels are placed on the tray to collect the calcium hydroxide discharged from the sampling port; and the asynchronous motor is used to rotate the tray.

[0010] Optionally, the pressure sensing subsystem is used to sense the wind pressure in the three-way pipe, and when the wind pressure in the three-way pipe reaches a preset wind pressure, sends an opening state instruction to the pneumatic angle seat valve.

[0011] Optionally, the preset wind pressure ranges from 0.2 to 0.4 MPa.

[0012] Optionally, the time control subsystem is used to send a closing state instruction to the pneumatic angle seat valve after the pneumatic angle seat valve is in the open state for a first set time.

[0013] Optionally, the time control subsystem is used to send an open state instruction to the pneumatic angle seat valve after sending a close state instruction to the pneumatic angle seat valve for a second set time.

[0014] Optionally, the asynchronous motor is a three-phase asynchronous motor.

[0015] Optionally, a quality management system is also included;

[0016] The quality management system is used to establish a calcium hydroxide sampling plan for the manufacturer that transports calcium hydroxide on the same day; the calcium hydroxide sampling plan includes the unloading manufacturer, the license plate of the unloading truck and the unloading weight.

[0017] Optionally, it also includes: an automatic vehicle identification system;

[0018] The automatic vehicle identification system is used to identify the license plate number of the unloading vehicle and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system.

[0019] Optionally, each receiving funnel is used to sample calcium hydroxide from one manufacturer.

[0020] In a second aspect, the present application provides a method for continuous automatic sampling of calcium hydroxide, comprising:

[0021] S1: Identify the license plate number of the unloading vehicle through the vehicle automatic identification system, and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system to confirm whether the unloading vehicle belongs to the manufacturer planned to unload on that day;

[0022] S2: If the manufacturer is scheduled to unload on the same day, the automatic sampling system will be started according to the calcium hydroxide sampling plan in the quality management system, and calcium hydroxide will be introduced through the feed port of the three-way pipe;

[0023] S3: The pressure sensing subsystem senses the wind pressure in the three-way pipe. When the wind pressure in the three-way pipe reaches the preset wind pressure, an opening state instruction is sent to the pneumatic angle seat valve.

[0024] S4: When the opening time of the pneumatic angle seat valve reaches the first set time set by the time control subsystem, a closing state instruction is sent to the pneumatic angle seat valve through the time control subsystem;

[0025] S5: When the closing time of the pneumatic angle seat valve reaches the second set time set by the time control subsystem, steps S3-S4 are repeated to perform the next sampling.

[0026] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0027] The present application provides a continuous automatic sampling device for calcium hydroxide and a sampling method thereof. First, the automatic sampling system precisely controls the sampling process by combining a three-way pipe and a pneumatic angle seat valve. The design of the three-way pipe allows calcium hydroxide to enter the pipe through the feed port without affecting the normal production process. When sampling is required, the pneumatic angle seat valve is opened to guide the calcium hydroxide to the sampling port. The rapid response and precise control of the pneumatic angle seat valve ensure timely opening and closing of the sampling port, thereby achieving continuous and accurate sampling. Second, the automatic control system further optimizes the sampling process through the synergy of the pressure sensing subsystem and the time control subsystem. The pressure sensing subsystem can monitor pressure changes in the pipe in real time, ensuring that sampling is carried out at the appropriate time, avoiding sampling errors caused by pressure fluctuations. The time control subsystem precisely controls the opening and closing time of the pneumatic angle seat valve according to a preset sampling cycle, ensuring the continuity and stability of sampling. Finally, the automatic calcium hydroxide collection system realizes the automatic collection and classification of samples through the combination of a tray, an asynchronous motor, and a receiving funnel. The receiving funnel is placed on the tray and can accurately receive the calcium hydroxide sample discharged from the sampling port. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of an automatic sampling of calcium hydroxide provided in one embodiment of the present application;

[0030] Figure 2 This is a schematic diagram of the overall appearance and structure of the automatic calcium hydroxide sampling device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] Example 1

[0034] like Figure 1 As shown, a calcium hydroxide continuous automatic sampling device includes: an automatic sampling system, an automatic control system and a calcium hydroxide automatic collection system;

[0035] The automatic sampling system includes a three-way pipe and a pneumatic angle seat valve; the three-way pipe includes a feed port, a warehouse port and a sampling port; the pneumatic angle seat valve is used to open and close the sampling port;

[0036] The automatic control system includes a pressure sensing subsystem and a time control subsystem, which are used to control the state of the pneumatic angle seat valve; the state includes an open state and a closed state;

[0037] The automatic calcium hydroxide collection system includes a tray, an asynchronous motor and a plurality of receiving funnels; the receiving funnels are placed on the tray to collect the calcium hydroxide discharged from the sampling port; and the asynchronous motor is used to rotate the tray.

[0038] In some embodiments, the apparatus further comprises a quality management system;

[0039] The quality management system is used to establish a calcium hydroxide sampling plan for the manufacturer that transports calcium hydroxide on the same day; the calcium hydroxide sampling plan includes the unloading manufacturer, the license plate of the unloading truck and the unloading weight.

[0040] In some embodiments, the apparatus further comprises an automatic vehicle identification system;

[0041] The automatic vehicle identification system is used to identify the license plate number of the unloading vehicle and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system.

[0042] The automatic sampling system is a calcium hydroxide automatic sampling system. During unloading, the unloading vehicle is pressurized, allowing the calcium hydroxide to flow into the production system under a wind pressure of 0.2-0.4 MPa. When the pressure sensing subsystem in the automatic control system senses that the wind pressure in the three-way pipe reaches a preset wind pressure, it sends an open state command to the pneumatic angle seat valve, allowing the material to flow into the receiving funnel in the automatic sampling system. The preset wind pressure range is 0.2-0.4 MPa.

[0043] The time control subsystem is configured to send a closing instruction to the pneumatic angle seat valve after the valve has been in the open state for a first set time. The time control subsystem is configured to send an opening instruction to the pneumatic angle seat valve after the valve has been in the closed state for a second set time. A PLC (Programmable Logic Controller) is provided within the time control subsystem to shut down the automatic sampling system at an appropriate time.

[0044] For example, after a pneumatic angle seat valve has been open for two minutes, the time control subsystem sends a closing command to the valve. Two minutes after the valve has been closed, the time control subsystem sends an opening command to the valve. Sampling at set intervals ensures uniformity and representativeness, improving sampling quality. Furthermore, each receiving hopper corresponds to a specific manufacturer's calcium hydroxide, enabling categorized sampling of calcium hydroxide from different manufacturers and facilitating subsequent quality analysis and traceability.

[0045] Specifically, the automatic control system is linked to the quality management system, vehicle identification system, and pneumatic angle seat valve. The automatic sampling device is activated and stopped using signals from air pressure and a set sampling time. When a vehicle begins unloading, the vehicle identification system transmits a signal to the automatic control system, preparing to activate the automatic sampling device. When the air pressure reaches the set value, the pneumatic angle seat valve activates and begins automatic, intermittent sampling, ultimately stopping after a specified time. Once sampling is complete, the automatic control system automatically transmits sampling information, including the vehicle license plate number, manufacturer, weight, and sample status, to the quality management system.

[0046] In some embodiments, the automatic calcium hydroxide collection system includes a receiving funnel and an asynchronous motor. The sample collected by the automatic sampling device falls into a designated fan-shaped collector on the sampling tray under the action of the three-phase asynchronous motor. After each sampling of the same manufacturer is completed, the tray rotates 45 degrees under the action of the asynchronous motor and rotates to the next designated collector, realizing automatic sampling and orderly collection of calcium hydroxide. At this point, the entire sampling process is successfully completed, and the system immediately enters standby mode, ready for the arrival of the next vehicle.

[0047] Furthermore, in some embodiments, Figure 2As shown, a calcium hydroxide continuous automatic sampling device is also provided with a manual sampling interface, which is used by the operator to perform manual sampling through the manual sampling interface in special circumstances, such as when the automatic sampling system fails or the sampling process needs to be verified.

[0048] Example 2

[0049] This embodiment provides a sampling method based on the calcium hydroxide continuous automatic sampling device, comprising:

[0050] S1: Identify the license plate number of the unloading vehicle through the vehicle automatic identification system, and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system to confirm whether the unloading vehicle belongs to the manufacturer planned to unload on that day;

[0051] S2: If the manufacturer is scheduled to unload on the same day, the automatic sampling system will be started according to the calcium hydroxide sampling plan in the quality management system, and calcium hydroxide will be introduced through the feed port of the three-way pipe;

[0052] S3: The pressure sensing subsystem senses the wind pressure in the three-way pipe. When the wind pressure in the three-way pipe reaches the preset wind pressure, an opening state instruction is sent to the pneumatic angle seat valve.

[0053] S4: When the opening time of the pneumatic angle seat valve reaches the first set time set by the time control subsystem, a closing state instruction is sent to the pneumatic angle seat valve through the time control subsystem;

[0054] S5: When the closing time of the pneumatic angle seat valve reaches the second set time set by the time control subsystem, steps S3-S4 are repeated to perform the next sampling.

[0055] Specifically, such as Figure 2 As shown, the continuous automatic sampling method of calcium hydroxide mainly includes the following steps:

[0056] When a vehicle enters the unloading area, the automatic vehicle identification system detects key sampling information, such as the make and weight of the unloading vehicle, and compares it with the sampling plan in the quality management system. When the vehicle information matches the sampling plan, it is transmitted to the software automatic control system.

[0057] During the unloading process, calcium hydroxide flows into the transport vehicle's air duct under a wind pressure of 0.2-0.4 MPa and enters the silo through the silo pipe. When the pressure reaches the threshold set by the automatic control system, the pneumatic angle seat valve automatically opens, allowing the calcium hydroxide material to flow into the automatic sampling device.

[0058] The automatic control system is linked to the vehicle identification system and the pneumatic angle seat valve. Once the vehicle begins unloading and the air pressure reaches the set value, the automatic control system activates the pneumatic angle seat valve to begin sampling. After sampling continues for a preset time, the automatic control system closes the pneumatic angle seat valve, halting sampling.

[0059] After sampling is complete, the calcium hydroxide sample is collected in an automatic collection device. This device includes a receiving funnel and an asynchronous motor, which drives the sample into a designated fan-shaped collector on the sampling tray. Once the manufacturer's transport vehicle has finished sampling, the tray rotates 45 degrees under the control of the asynchronous motor and collects the next sample into the next designated collector.

[0060] At the same time, the automatic control system automatically transmits sampling information such as license plate number, manufacturer, weight, sample status, etc. to the quality management system for subsequent analysis and recording.

[0061] The entire process realizes continuous automatic sampling of calcium hydroxide, improving sampling efficiency and accuracy.

[0062] In summary, this application has the following technical effects:

[0063] (1) Automatic license plate recognition and sampling plan comparison: When a vehicle arrives and enters the unloading workshop, the system can quickly and accurately identify the license plate number and compare it with the sampling plan in the quality management system. This innovation greatly improves work efficiency and accuracy, and avoids errors and delays caused by human operation.

[0064] (2) Automated control system and air pressure drive: The system receives air pressure signals and automatically opens the pneumatic angle seat valve when the air pressure reaches the preset standard, allowing the material to flow into the automatic collection device. This innovation realizes the automated control of the process, reduces manual intervention, and improves safety and stability.

[0065] (3) PLC precisely controls sampling and sample delivery: The PLC (Programmable Logic Controller) precisely controls the movement of the sampling tray and shuts down the automatic sampling device in a timely manner according to the sampling time signal. At the same time, it drives the three-phase asynchronous motor to accurately deliver the sample to the designated fan-shaped collector in the sampling tray, ensuring the accuracy and efficiency of sample collection.

[0066] (4) Automatic tray rotation and orderly sample collection: After each sampling, the tray automatically rotates 45° driven by an asynchronous motor and locates to the next designated collector, realizing the automatic and orderly collection of calcium hydroxide. This not only improves work efficiency but also ensures the integrity and traceability of the samples.

[0067] (5) In order to solve the problem of low sampling accuracy, low efficiency and potential safety hazards in the manual sampling method of calcium hydroxide used in desulfurization and purification in the electrolytic aluminum industry, we broke through the old model and innovated, and independently developed a continuous automatic sampling system for calcium hydroxide, which realized automatic and continuous sampling, classified storage and reduced manual labor.

[0068] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A calcium hydroxide continuous automatic sampling device, characterized in that, include: Automatic sampling system, automatic control system and automatic calcium hydroxide collection system; The automatic sampling system includes a three-way pipe and a pneumatic angle seat valve; the three-way pipe includes a feed port, a warehouse port and a sampling port; the pneumatic angle seat valve is used to open and close the sampling port; The automatic control system includes a pressure sensing subsystem and a time control subsystem, which are used to control the state of the pneumatic angle seat valve; the state includes an open state and a closed state; The automatic calcium hydroxide collection system includes a tray, an asynchronous motor and a plurality of receiving funnels; the receiving funnels are placed on the tray to collect the calcium hydroxide discharged from the sampling port; and the asynchronous motor is used to rotate the tray.

2. A calcium hydroxide continuous automatic sampling device according to claim 1, characterized in that, The pressure sensing subsystem is used to sense the wind pressure in the three-way pipe, and when the wind pressure in the three-way pipe reaches a preset wind pressure, it sends an opening state instruction to the pneumatic angle seat valve.

3. A calcium hydroxide continuous automatic sampling device according to claim 2, characterized in that, The preset wind pressure ranges from 0.2 to 0.4 MPa.

4. A calcium hydroxide continuous automatic sampling device according to claim 1, characterized in that, The time control subsystem is used to send a closing state instruction to the pneumatic angle seat valve after the pneumatic angle seat valve is in the open state for a first set time.

5. A calcium hydroxide continuous automatic sampling device according to claim 4, characterized in that, The time control subsystem is used to send an open state instruction to the pneumatic angle seat valve after sending a close state instruction to the pneumatic angle seat valve for a second set time.

6. A calcium hydroxide continuous automatic sampling device according to claim 1, characterized in that, The asynchronous motor is a three-phase asynchronous motor.

7. A calcium hydroxide continuous automatic sampling device according to claim 1, characterized in that, It also includes quality management systems; The quality management system is used to establish a calcium hydroxide sampling plan for the manufacturer that transports calcium hydroxide on the same day; the calcium hydroxide sampling plan includes the unloading manufacturer, the license plate of the unloading truck and the unloading weight.

8. A calcium hydroxide continuous automatic sampling device according to claim 7, characterized in that, Also includes: Automatic Vehicle Identification System; The automatic vehicle identification system is used to identify the license plate number of the unloading vehicle and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system.

9. A calcium hydroxide continuous automatic sampling device according to claim 8, characterized in that, Each receiving funnel is used to sample calcium hydroxide from one manufacturer.

10. A sampling method based on a calcium hydroxide continuous automatic sampling device according to any one of claims 1 to 9, characterized in that, include: S1: Identify the license plate number of the unloading vehicle through the vehicle automatic identification system, and compare the identified license plate number with the calcium hydroxide sampling plan in the quality management system to confirm whether the unloading vehicle belongs to the manufacturer planned to unload on that day; S2: If the manufacturer is scheduled to unload on the same day, the automatic sampling system will be started according to the calcium hydroxide sampling plan in the quality management system, and calcium hydroxide will be introduced through the feed port of the three-way pipe; S3: The pressure sensing subsystem senses the wind pressure in the three-way pipe. When the wind pressure in the three-way pipe reaches the preset wind pressure, an opening state instruction is sent to the pneumatic angle seat valve. S4: When the opening time of the pneumatic angle seat valve reaches the first set time set by the time control subsystem, a closing state instruction is sent to the pneumatic angle seat valve through the time control subsystem; S5: When the closing time of the pneumatic angle seat valve reaches the second set time set by the time control subsystem, steps S3-S4 are repeated to perform the next sampling.

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