Automatic periodic sampling system for bulk aluminum oxide

Abstract

The utility model provides an automatic periodic sampling system for aluminum oxide in bulk, which comprises a silo for storing aluminum oxide powder, a discharge pipe arranged at the bottom of the silo, and two branch material pipes arranged below the discharge pipe, namely a discharge branch pipe and a sampling branch pipe; a discharge valve is arranged between the discharge pipe and the inlet of the discharge branch pipe; a sampling valve is arranged between the outlet of the sampling branch pipe and the inlet of the discharging branch pipe; and the emptying valve and the sampling valve are electrically connected with the controller respectively. According to the utility model, the sampling branch pipe is arranged on the discharge pipe, and the sampling valve which can be controlled to be opened and closed by the controller is arranged on the sampling branch pipe, so that the purpose of automatic sampling is realized, and the labor intensity of workers is reduced; and meanwhile, the problems of low working efficiency, dust damage to workers and the like caused by manual sampling are avoided.

Description

Technical Field

[0001] This invention relates to the field of alumina sampling technology, specifically to an automatic periodic sampling system for bulk alumina. Background Technology

[0002] Alumina, the raw material for electrolytic aluminum plants, is an important industrial raw material. Testing its quality and performance is crucial for ensuring product quality, improving production efficiency, and guaranteeing safety. Therefore, periodic sampling and screening of alumina samples are essential during the production of aluminum-related products.

[0003] Currently, bulk alumina sampling is still done manually. However, this method not only reduces the efficiency of daily work but also poses a significant risk of dust-related injuries due to the large amount of dust generated during manual sampling. With the increasing use of various instruments in industrial automation, developing a system capable of automatically sampling bulk alumina is therefore essential. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide an automatic periodic sampling system for bulk alumina.

[0005] An automatic periodic sampling system for bulk alumina includes: a silo for storing alumina powder, a discharge pipe at the bottom of the silo, and two branch pipes below the discharge pipe, namely a discharge branch pipe and a sampling branch pipe.

[0006] A discharge valve is provided between the inlet of the discharge pipe and the inlet of the discharge branch pipe;

[0007] A sampling valve is installed between the outlet of the sampling branch pipe and the inlet of the discharge branch pipe;

[0008] The discharge valve and sampling valve are electrically connected to the controller.

[0009] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, a flow switch for determining the sample flow rate is provided on the sampling branch pipe, and the flow switch is electrically connected to the controller.

[0010] Furthermore, in the aforementioned automated periodic sampling system for bulk alumina, the material flow switch includes:

[0011] A connecting rod is movably and sealingly connected to the wall of the sampling branch tube. A detection spoon is fixed to one end of the connecting rod, and a connecting block is fixed to the other end. The detection spoon is inside the sampling branch tube, and the connecting block is outside the sampling branch tube.

[0012] The housing, wherein the connecting block is disposed above the housing;

[0013] A spring, one end of which is fixed to the bottom of the connecting block, and the other end of which passes through the housing and has a movable contact fixed at its end;

[0014] An upper stationary contact and a lower stationary contact are fixed at the top and bottom of the housing, respectively. Under the tension of the spring, the moving contact can contact the upper stationary contact or disconnect from the lower stationary contact to trigger a material flow signal and transmit it to the controller.

[0015] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, the angle between the connecting rod and the horizontal plane is: 0° ≤ angle ≤ 75°.

[0016] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, the upper stationary contact has two upper contacts; the stationary contact has two lower contacts.

[0017] The moving contact has an H-shaped structure, with two contacts at the upper part that match the position of the upper contact, and two contacts at the lower part that match the position of the lower contact.

[0018] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, a spring sleeve is fitted around the outside of the spring, and the spring sleeve penetrates and is fixed to the upper shell wall of the housing.

[0019] Furthermore, in the above-mentioned automatic periodic sampling system for bulk alumina, a feed pipe is provided below the silo, and a feed valve is provided on the feed pipe; a blower is provided at the inlet of the feed pipe; and a sensor capable of sensing transport vehicles is provided at the outlet of the discharge branch pipe.

[0020] The sensors capable of sensing transport vehicles, the feed valve, and the blower are all electrically connected to the controller.

[0021] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, a conveying device for conveying alumina samples is provided below the outlet of the sampling branch pipe.

[0022] Furthermore, in the above-described automatic periodic sampling system for bulk alumina, the lower part of the silo is a conical structure, and an electric vibrator is installed on the outside of the side wall of the conical structure of the silo. The electric vibrator is electrically connected to the controller.

[0023] Beneficial effects:

[0024] The automatic periodic sampling system for bulk alumina provided by this utility model achieves automatic sampling by setting a sampling branch pipe on the discharge pipe and a sampling valve on the sampling branch pipe that can be controlled by a controller to open and close, thereby reducing the labor intensity of workers; at the same time, it avoids the problems of low work efficiency and dust harm to workers caused by manual sampling. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the automatic periodic sampling system for bulk alumina of this utility model.

[0026] Figure 2 A schematic diagram of the material flow switch structure provided by this utility model;

[0027] Figure label:

[0028] 1-Silo, 2-Controller, 3-Blower; 4-Infeed Valve; 5-Electric Vibrator; 6-Discharge Valve, 7-Discharge Pipe; 71-Discharge Branch Pipe; 72-Sampling Branch Pipe; 8-Material Flow Switch; 9-Sampling Valve, 10-Conveying Device;

[0029] 801-Detection spoon; 802-Connecting rod; 803-Connecting block; 804-Spring; 805-Upper stationary contact; 8501-Upper contact; 806-Moving contact; 807-Lower stationary contact; 808-Spring sleeve; 809-Housing. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Currently, manual sampling of bulk alumina (alumina powder) reduces the efficiency of daily work and increases the labor intensity for workers. Furthermore, the manual sampling process generates significant dust, posing a high risk of dust-related injuries. Therefore, this invention provides a system capable of automatic periodic sampling. Figure 1 This is a schematic diagram of the automatic periodic sampling system for bulk alumina of this utility model. Figure 1As shown, the system includes: a silo 1 for storing alumina powder; a discharge pipe 7 is provided at the bottom of the silo 1; two branch pipes are provided below the discharge pipe 7, namely a discharge branch pipe 71 and a sampling branch pipe 72; a discharge valve 6 is provided between the inlet of the discharge pipe 7 and the inlet of the discharge branch pipe 71; and a sampling valve 9 is provided between the outlet of the sampling branch pipe 72 and the inlet of the discharge branch pipe 71; the discharge valve 6 and the sampling valve 9 are electrically connected to the controller 2.

[0032] Specifically, controller 2 controls the opening and closing of discharge valve 6 and sampling valve 9. When both discharge valve 6 and sampling valve 9 are open, the alumina powder in silo 1 falls into discharge branch pipe 71 and sampling branch pipe 72 respectively after passing through discharge pipe 7. The alumina powder falling into discharge branch pipe 71 is transported to the destination by a transport vehicle, while the alumina powder falling into sampling branch pipe 72 is used as a sample for testing to monitor the quality of the alumina powder transported this time.

[0033] The system provided by this utility model achieves automatic sampling by setting a sampling branch pipe 72 on the discharge pipe 7 and a sampling valve 9 on the sampling branch pipe 72 that can be controlled to open and close by the controller 2, thereby reducing the labor intensity of workers; at the same time, it avoids problems such as low work efficiency and dust damage to workers caused by manual sampling.

[0034] Furthermore, this utility model provides a flow switch 8 on the sampling branch pipe 72 for determining the sample flow rate, and the flow switch 8 is electrically connected to the controller 2.

[0035] Specifically, the flow switch 8 is used to determine the sample flow rate. It can output three flow signals: a no-flow signal (alumina powder does not touch the flow switch), a small-flow signal (only a small portion of alumina powder falls onto the flow switch), and a large-flow signal. The controller 2 determines the opening time of the sampling valve 9 based on these three flow signals to ensure that the quality of the collected alumina powder sample is sufficient for testing or other purposes.

[0036] The system provided by this utility model, by setting a material flow switch 8 on the sampling branch pipe 72, enables the system to determine the opening time of the sampling valve 9 according to the material flow rate of the sample, thereby enabling more precise control of the sampling amount of alumina powder sample.

[0037] Furthermore, Figure 2 This is a schematic diagram of the material flow switch structure provided by this utility model, as shown below. Figure 2As shown, the material flow switch 8 includes: a connecting rod 802, which is movably and sealingly connected to the wall of the sampling branch pipe 72. One end of the connecting rod 802 is fixed with a detection spoon 801, and the other end is fixed with a connecting block 803. The detection spoon 801 is inside the sampling branch pipe 72, and the connecting block 803 is outside the sampling branch pipe 72. A housing 809 is provided above the housing 809. A spring 804 is provided, with one end fixedly connected to the bottom of the housing 809 and the other end passing through the housing 809 and having a moving contact 806 fixed at its end. An upper stationary contact 805 and a lower stationary contact 807 are fixed at the top and bottom of the housing 809, respectively. Under the tension of the spring 804, the moving contact 806 can contact the upper stationary contact 805 or disconnect from the lower stationary contact 807 to trigger a material flow signal and transmit it to the controller 2.

[0038] Specifically, after the connecting rod 802 passes through the wall of the sampling branch pipe 72, one end of it is fixedly connected to the detection spoon 801, and the other end is fixedly connected to the connecting block 803. The sealing connection between the connecting rod 802 and the sampling branch pipe 72 can be achieved by opening an opening in the wall of the sampling branch pipe 72 that is adapted to the outer edge size of the connecting rod 802, sealingly connecting a rubber sleeve to the edge of the opening, and sealingly connecting the other end of the rubber sleeve to the connecting rod 802, thereby achieving a sealed and movable connection between the connecting rod 802 and the sampling branch pipe 72.

[0039] In the initial state, the moving contact 806 is in contact with the lower stationary contact 807 (the two can be brought together by magnetic attraction). At this time, the lower stationary contact 807 triggers a material flow signal and transmits it to the controller 2, so that the controller knows that no sample has fallen in the current state. When a small amount of alumina powder falls, the alumina powder falls into the detection spoon 801. Due to its gravity, the connecting rod 802 begins to tilt, and the connecting block 803 moves upward, thereby driving the spring 804 to stretch. The stretching of the spring 804, in turn, drives the moving contact 806 to move upward, thus bringing the lower stationary contact 807 and the moving contact 806 into contact. 6. Separation (at this time, not in contact with the upper stationary contact 805). At this time, the lower stationary contact 807 will trigger a separation signal to the controller 2 so that the controller knows that a small amount of sample has fallen in the current state. When a large flow of alumina powder falls, the detection spoon 801 will move further down due to gravity, thereby driving the moving contact 806 to move further up and contact the upper stationary contact 805. At this time, the upper stationary contact 805 will trigger a contact signal and transmit it to the controller 2 so that the controller knows that a large flow of sample has fallen in the current state. Thus, the controller 2 can determine the opening time of the sampling valve 9 according to the size of the alumina powder flow.

[0040] It should be noted that sensors are provided on the upper stationary contact 805 and the lower stationary contact 807 respectively to sense their contact status (contact or separation) with the moving contact 806. These sensors can transmit the sensed material flow signal to the controller 2.

[0041] The system provided by this utility model, by setting the upper stationary contact 805, the moving contact 806, and the lower stationary contact 807 inside the housing 809, makes the acquisition of the material flow signal unaffected by external factors, thereby improving the contact sensitivity of the material flow switch and also increasing the service life of the material flow switch.

[0042] Furthermore, the angle between the connecting rod 802 and the horizontal plane is: 0°≤angle≤75°.

[0043] The system provided by this utility model allows the connecting rod 802 to be in a horizontal or inclined state. However, when in an inclined state, the end connecting to the detection spoon is tilted upwards, and the angle of inclination should not be too large, preferably not exceeding 75°. This is because if the angle is too high, the detection spoon will not be able to collect the detection sample well, thus preventing the connecting rod 802 from tilting effectively and in a timely manner.

[0044] Furthermore, such as Figure 2 As shown, the upper stationary contact 805 has two upper contacts 8501; the stationary contact 807 has two lower contacts 8071; the moving contact 806 has an H-shaped structure, with two contacts on the upper part of the moving contact 806 that match the positions of the upper contacts 8501; and two contacts on the lower part of the moving contact 806 that match the positions of the lower contacts 8071. Sensors capable of sensing whether the moving contact 806 is in contact with each of the two upper contacts 8501 and the two lower contacts 8071 are respectively provided, and these sensors are electrically connected to the controller 2.

[0045] Furthermore, the present invention provides a spring sleeve 808 on the outside of the spring 804, and the spring sleeve 808 penetrates and is fixed to the upper shell wall of the housing 809.

[0046] The system provided by this utility model can protect the tension of the spring 804 from external influences by sleeved with a spring sleeve 808 on the outside of the spring 804, thereby improving the sensitivity of the entire device.

[0047] Furthermore, a feed pipe is installed below the silo 1, and a feed valve 4 is installed on the feed pipe; a blower 3 is installed at the inlet of the feed pipe; and a sensor capable of detecting transport vehicles is installed at the outlet of the discharge branch pipe 71. The sensor capable of detecting transport vehicles, the feed valve 4, and the blower 3 are all electrically connected to the controller 2.

[0048] Specifically, when the sensor detects a transport vehicle approaching below the discharge branch pipe 71, the controller 2 controls the blower 3 and the feed valve 4 to open, and the blower 3 discharges alumina powder into the silo 1. When the alumina powder stored in the silo 1 reaches the preset requirement, the discharge valve 6 is opened to start discharging. At the same time as discharging, a portion of the alumina powder falls into the transport vehicle through the discharge branch pipe 71, and a portion of the alumina powder is used as a test sample and is output through the sampling branch pipe 72 and finally falls onto the conveying device 10 for testing personnel to collect and use for testing.

[0049] The system provided by this utility model, by setting a sensor below the discharge branch pipe 71, allows the controller to determine whether to open or close the discharge valve 6 based on the presence or absence of a vehicle, thus avoiding the misconception of discharging material when there is no transport vehicle.

[0050] The conveying device 10 can be a conveyor belt or a screw conveyor mechanism. This application does not limit this, as long as it can effectively collect the test sample flowing out of the sampling branch pipe 72.

[0051] Furthermore, the lower part of the silo 1 is a conical structure, and an electric vibrator 5 is installed on the outside of the side wall of the conical structure of the silo 1. The electric vibrator 5 is electrically connected to the controller 2.

[0052] Specifically, the electric vibrator 5 is used to prevent alumina powder from scaling and clogging inside the conical silo 1.

[0053] The system provided by this utility model, by setting an electric vibrator 5 below the silo 1, avoids the alumina powder from scaling and clogging the discharge pipe, thereby improving both discharge efficiency and sampling efficiency.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automated periodic sampling system for bulk alumina, comprising: A silo (1) for storing alumina powder is provided with a discharge pipe (7) at the bottom of the silo (1). The characteristic feature is that two branch pipes are opened below the discharge pipe (7), namely a discharge branch pipe (71) and a sampling branch pipe (72). A discharge valve (6) is provided between the inlet of the discharge pipe (7) and the inlet of the discharge branch pipe (71). A sampling valve (9) is provided between the outlet of the sampling branch pipe (72) and the inlet of the discharge branch pipe (71). The discharge valve (6) and sampling valve (9) are electrically connected to the controller (2); A flow switch (8) for determining the sample flow rate is provided on the sampling branch pipe (72), and the flow switch (8) is electrically connected to the controller (2); The material flow switch (8) includes: A connecting rod (802) is movably and sealingly connected to the wall of the sampling branch pipe (72). One end of the connecting rod (802) is fixed with a detection spoon (801), and the other end is fixed with a connecting block (803). The detection spoon (801) is inside the sampling branch pipe (72), and the connecting block (803) is outside the sampling branch pipe (72). The housing (809) has the connecting block (803) disposed above it; A spring (804) has one end fixed to the bottom of the connecting block (803), and the other end passes through the housing (809) and has a movable contact (806) fixed at its end. An upper stationary contact (805) and a lower stationary contact (807) are fixed at the top and bottom of the housing (809), respectively. Under the tension of the spring (804), the moving contact (806) can contact the upper stationary contact (805) or disconnect from the lower stationary contact (807) to trigger a material flow signal and transmit it to the controller (2). The upper stationary contact (805) is provided with two upper contacts (8501); the stationary contact (807) is provided with two lower contacts (8071). The moving contact (806) has an H-shaped structure. Two contacts matching the position of the upper contact (8501) are provided on the upper part of the moving contact (806); and two contacts matching the position of the lower contact (8071) are provided on the lower part of the moving contact (806). A spring sleeve (808) is fitted around the outside of the spring (804), and the spring sleeve (808) passes through and is fixed to the upper shell wall of the housing (809).

2. The automatic periodic sampling system for bulk alumina according to claim 1, characterized in that, The angle between the connecting rod (802) and the horizontal plane is: 0°≤angle≤75°.

3. The automatic periodic sampling system for bulk alumina according to any one of claims 1-2, characterized in that, A feed pipe is provided below the silo (1), and a feed valve (4) is provided on the feed pipe; a blower (3) is provided at the inlet of the feed pipe; and a sensor capable of sensing transport vehicles is provided at the outlet of the discharge branch pipe (71). The sensor capable of sensing the transport vehicle, the feed valve (4), and the blower (3) are all electrically connected to the controller (2).

4. The automatic periodic sampling system for bulk alumina according to claim 1, characterized in that, Below the outlet of the sampling branch pipe (72), a conveying device for conveying alumina samples is provided.

5. The automatic periodic sampling system for bulk alumina according to claim 1, characterized in that, The silo (1) has a conical structure at the bottom. An electric vibrator (5) is installed on the outside of the side wall of the conical structure of the silo (1). The electric vibrator (5) is electrically connected to the controller (2).

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