Heavy calcium powder sampling system

Abstract

The invention discloses a heavy calcium powder sampling system, and relates to the technical field of sampling, the heavy calcium powder sampling system comprises a sample conveying tank installed in a grinding workshop and a sample collecting tank installed in a detection workshop, and the sample conveying tank and the sample collecting tank are connected through a sample pneumatic conveying pipeline; the sample conveying tank is used for receiving the heavy calcium powder sample output by the dust collector, mixing the heavy calcium powder sample with airflow and outputting the mixture to the sample pneumatic conveying pipeline; and the sample collecting tank is used for receiving a mixture of the heavy calcium powder sample output by the sample pneumatic conveying pipeline and the air flow and separating the heavy calcium powder sample from the air flow. The ground calcium carbonate powder sample conveying device can directly convey a ground calcium carbonate powder sample in a grinding workshop to a detection workshop, does not need to be manually sampled in the grinding workshop on site, and is good in safety and high in working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sampling, and in particular to a heavy calcium powder sampling system. Background Art

[0002] During the production process of heavy calcium carbonate (heavy calcium powder), it is usually necessary to regularly sample and test the heavy calcium powder to obtain information such as the particle size, whiteness and oil absorption value of the heavy calcium powder to ensure the production quality of the heavy calcium powder.

[0003] At present, the sampling of heavy calcium powder mainly relies on manual on-site sampling in the grinding workshop: a sampling valve is set on the dust collector at the rear end of the grinding mill. The sampling personnel first connect the collection bucket to the sampling valve, and then open the sampling valve. The heavy calcium powder will automatically fall into the collection bucket under the action of gravity, and the sampling is completed.

[0004] However, the equipment in the grinding workshop is huge, the pipelines are crisscrossed, and the environment is relatively complex. Manual on-site sampling in the grinding workshop requires working at heights, which is not only unsafe but also inefficient. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a heavy calcium powder sampling system, which can directly transport the heavy calcium powder samples from the grinding workshop to the testing workshop, without the need for manual on-site sampling in the grinding workshop, with good safety and high work efficiency.

[0006] The present invention provides a heavy calcium powder sampling system, the heavy calcium powder sampling system comprises a sample conveying tank installed in a grinding workshop and a sample collecting tank installed in a testing workshop, the sample conveying tank and the sample collecting tank are connected through a sample pneumatic conveying pipeline;

[0007] The sample conveying tank is used to receive the heavy calcium powder sample outputted from the dust collector, and mix the heavy calcium powder sample with the airflow and output it to the sample pneumatic conveying pipeline;

[0008] The sample collection tank is used to receive the mixture of the heavy calcium powder sample and the airflow output by the sample pneumatic conveying pipeline, and separate the heavy calcium powder sample from the airflow.

[0009] Specifically, the upper end of the sample conveying tank is connected to the dust collector through a first electromagnetic two-way valve; the upper part of the sample conveying tank is connected to a plurality of compressed air injection heads, and the compressed air injection heads are used to convey compressed air into the sample conveying tank; the lower end of the sample conveying tank is respectively connected to the powder conveying main pipeline and the sample pneumatic conveying pipeline through a first electromagnetic three-way valve;

[0010] The upper part of the sample collection tank is connected to the sample pneumatic conveying pipeline through a second electromagnetic two-way valve; an air inlet and outlet channel is provided on the top of the sample collection tank, and a filter is provided inside the sample collection tank, one end of the air inlet and outlet channel is connected to the filter, and the other end of the air inlet and outlet channel is connected to a fan through a third electromagnetic two-way valve, and the fan is used to extract the air inside the sample collection tank or to input air into the sample collection tank; the bottom of the sample collection tank is respectively connected to the collection bucket and the powder conveying main pipeline through a second electromagnetic three-way valve, and the second electromagnetic three-way valve is connected to the powder conveying main pipeline through a sample pneumatic recovery pipeline.

[0011] Specifically, the volume range of the sample transport tank is 20-30L; and / or the volume range of the sample collection tank is 50-60L.

[0012] Specifically, the jet trajectories of the plurality of compressed air injection heads intersect at the lower portion of the sample transport tank to form a mixing point, the lower portion of the sample transport tank is a first inverted cone structure, and the mixing point is located at the apex of the first inverted cone structure.

[0013] Specifically, the upper part of the sample transport tank is connected to the three compressed air injection heads, and the three compressed air injection heads are distributed at equal intervals around the first electromagnetic two-way valve.

[0014] Specifically, a plurality of first pipeline pressurizing devices are arranged on the sample pneumatic conveying pipeline, and a plurality of second pipeline pressurizing devices are arranged on the sample pneumatic recovery pipeline.

[0015] Specifically, the first pipeline pressurizing device includes a first blower and a first pressurizing pipeline connected to the air outlet of the first blower, the first pressurizing pipeline is connected to a first feed branch pipe, the angle between the first feed branch pipe and the first pressurizing pipeline is in the range of 15° to 45°, and the feed end of the first feed branch pipe and the discharge end of the first pressurizing pipeline are both connected to the sample pneumatic conveying pipeline;

[0016] The second pipeline boosting device includes a second blower and a second boosting pipeline connected to the air outlet of the second blower, the second boosting pipeline is connected to a second feed branch, the angle between the second feed branch and the second boosting pipeline is in the range of 15° to 45°, and the feed end of the second feed branch and the discharge end of the second boosting pipeline are both connected to the sample pneumatic recovery pipeline.

[0017] Specifically, a plurality of flow sensors and a plurality of pressure sensors are provided on the sample pneumatic conveying pipeline and the sample pneumatic recovery pipeline.

[0018] Specifically, a plurality of safety valves are provided on the sample pneumatic conveying pipeline and the sample pneumatic recovery pipeline.

[0019] Specifically, the heavy calcium powder sampling system also includes a sampling control terminal installed in the testing workshop, and the sampling control terminal is used to control the entire heavy calcium powder sampling system.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The heavy calcium powder sampling system of the present invention has a sample conveying tank installed in the grinding workshop and a sample collecting tank installed in the testing workshop. The sample conveying tank and the sample collecting tank are connected by a sample pneumatic conveying pipeline. In this way, the heavy calcium powder sample in the grinding workshop can be directly transported to the testing workshop by pneumatic conveying. There is no need for manual on-site sampling in the grinding workshop, which avoids working at heights, has good safety and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a first structural schematic diagram of a heavy calcium powder sampling system in an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the sample transport tank in an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of a sample collection tank in an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of the jet trajectory of the compressed air injection head in an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a first pipeline pressurizing device in an embodiment of the present invention;

[0028] Figure 6 1 is a second structural schematic diagram of the heavy calcium powder sampling system in an embodiment of the present invention.

[0029] In the attached drawings, 10, dust collector; 20, powder conveying main pipeline; 30, collecting barrel; 100, sample conveying tank; 110, first electromagnetic two-way valve; 120, compressed air injection head; 130, first electromagnetic three-way valve; 200, sample collecting tank; 210, second electromagnetic two-way valve; 220, air inlet and outlet channel; 230, filter; 240, third electromagnetic two-way valve; 250, fan; 260, second electromagnetic three-way valve; 300, sample pneumatic conveying pipeline; 310, first pipeline boosting device; 311, first blower; 312, first boosting pipeline; 313, first feed branch pipe; 400, sample pneumatic recovery pipeline. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a heavy calcium powder sampling system. Figure 1 A first structural schematic diagram of a heavy calcium powder sampling system in an embodiment of the present invention is shown, wherein the heavy calcium powder sampling system comprises a sample conveying tank 100 installed in a grinding workshop and a sample collecting tank 200 installed in a testing workshop, wherein the sample conveying tank 100 and the sample collecting tank 200 are connected via a sample pneumatic conveying pipe 300; the sample conveying tank 100 is used to receive the heavy calcium powder sample output by the dust collector 10, and mix the heavy calcium powder sample with an airflow and output it to the sample pneumatic conveying pipe 300; the sample collecting tank 200 is used to receive the mixture of the heavy calcium powder sample and the airflow output by the sample pneumatic conveying pipe 300, and separate the heavy calcium powder sample from the airflow.

[0032] The heavy calcium powder sampling system of the present invention has a sample conveying tank 100 installed in the grinding workshop and a sample collecting tank 200 installed in the testing workshop. The sample conveying tank 100 and the sample collecting tank 200 are connected by a sample pneumatic conveying pipeline 300. In this way, the heavy calcium powder sample in the grinding workshop can be directly transported to the testing workshop by pneumatic conveying. There is no need for manual on-site sampling in the grinding workshop, which avoids high-altitude operations, has good safety and high work efficiency.

[0033] Figure 2 The schematic diagram of the structure of the sample delivery tank in the embodiment of the present invention is shown in conjunction with Figure 1The upper end of the sample delivery tank 100 is connected to the dust collector 10 through a first electromagnetic two-way valve 110; the upper part of the sample delivery tank 100 is connected to a plurality of compressed air injection heads 120, and the compressed air injection heads 120 are used to deliver compressed air into the sample delivery tank 100; the lower end of the sample delivery tank 100 is respectively connected to the powder delivery main pipeline 20 and the sample pneumatic delivery pipeline 300 through a first electromagnetic three-way valve 130. The sample delivery tank 100 can achieve different functions and effects through the cooperation of the first electromagnetic two-way valve 110, the first electromagnetic three-way valve 130 and the compressed air injection head 120.

[0034] For example, the first electromagnetic two-way valve 110 is closed, the first electromagnetic three-way valve 130 is opened to connect the sample delivery tank 100 and the powder delivery main pipeline 20, and the compressed air injection head 120 is turned on to quickly blow clean the sample delivery tank 100 with the help of compressed air.

[0035] For example, close the first electromagnetic three-way valve 130, close the compressed air injection head 120, open the first electromagnetic two-way valve 110, and the heavy calcium powder in the dust collector 10 will automatically fall into the sample conveying tank 100 under the action of gravity. The collection amount of the heavy calcium powder sample can be controlled by controlling the opening time of the first electromagnetic two-way valve 110. In addition, a tubular screw conveyor is generally arranged horizontally at the lower part of the dust collector 10, which is used to centrally output the heavy calcium powder collected by the dust collector 10 to the powder conveying main pipeline 20; a sampling interface is provided on the lower side of the tubular screw conveyor of the dust collector 10, and the first electromagnetic two-way valve 110 is connected to the sampling interface, so that the speed at which the heavy calcium powder sample falls into the sample conveying tank 100 can be increased by the power of the tubular screw conveyor, which is conducive to improving the sampling efficiency.

[0036] For example, when it is necessary to mix the heavy calcium powder sample with the airflow and output it to the sample pneumatic conveying pipeline 300: first, keep the first electromagnetic two-way valve 110 and the first electromagnetic three-way valve 130 closed, open the compressed air injection head 120, and pressurize the internal pressure of the sample conveying tank 100 to 10kPa; then, open the first electromagnetic three-way valve 130 to connect the sample conveying tank 100 and the sample pneumatic conveying pipeline 300, so that the heavy calcium powder sample is mixed with the airflow and output it to the sample pneumatic conveying pipeline 300. Moreover, when the sample pneumatic conveying pipeline 300 conveys the heavy calcium powder sample, keep the first electromagnetic three-way valve 130 open to connect the sample conveying tank 100 and the sample pneumatic conveying pipeline 300, and the compressed air injection head 120 continues to inject compressed air into the sample conveying tank 100, so that the internal pressure of the sample conveying tank 100 is maintained above 5kPa.

[0037] Figure 3 The schematic diagram of the structure of the sample collection tank in the embodiment of the present invention is shown ( Figure 3 Partial cutaway to reveal the internal filter), please refer to Figure 1 The upper part of the sample collection tank 200 is connected to the sample pneumatic conveying pipeline 300 through a second electromagnetic two-way valve 210; an air inlet and outlet channel 220 is provided at the top of the sample collection tank 200, and a filter 230 is provided inside the sample collection tank 200, one end of the air inlet and outlet channel 220 is connected to the filter 230, and the other end of the air inlet and outlet channel 220 is connected to a fan 250 through a third electromagnetic two-way valve 240, and the fan 250 is used to extract the air inside the sample collection tank 200 or to input air into the sample collection tank 200; the bottom of the sample collection tank 200 is respectively connected to the collection bucket 30 and the powder conveying main pipeline 20 through a second electromagnetic three-way valve 260, and the second electromagnetic three-way valve 260 is connected to the powder conveying main pipeline 20 through a sample pneumatic recovery pipeline 400. The sample collection tank 200 can also achieve different functions and effects through the cooperation of the second electromagnetic two-way valve 210 , the third electromagnetic two-way valve 240 , the air inlet and outlet channel 220 , the filter 230 , the fan 250 and the second electromagnetic three-way valve 260 .

[0038] For example, close the second electromagnetic two-way valve 210, open the third electromagnetic two-way valve 240, open the second electromagnetic three-way valve 260 to connect the sample collection tank 200 and the powder conveying main pipeline 20, and turn on the fan 250 to input air into the sample collection tank 200 (air volume 5-10m 3 / h), the sample collection tank 200 can be cleaned by means of flowing air; at the same time, the filter 230 can also be purified, the dust on the outer surface of the filter 230 can be blown off, and the filtering performance of the filter 230 can be restored.

[0039] For example, the second electromagnetic two-way valve 210 is opened, the third electromagnetic two-way valve 240 is opened, the second electromagnetic three-way valve 260 is closed, and the fan 250 is turned on to extract the air inside the sample collection tank 200 (air volume 10-15m 3 / h); after the mixture of the heavy calcium powder sample and the air flow enters the sample collection tank 200, the air will be drawn out by the fan 250 through the filter 230, and the heavy calcium powder sample will be intercepted by the filter 230 and remain in the sample collection tank 200.

[0040] For example, close the second electromagnetic two-way valve 210, open the third electromagnetic two-way valve 240, open the second electromagnetic three-way valve 260 to connect the sample collection tank 200 and the collection bucket 30, and turn on the fan 250 to input air into the sample collection tank 200 (air volume 0.5-1.8m 3 / h), the heavy calcium powder sample is discharged from the sample collection tank 200 and falls into the collection bucket 30.

[0041] In addition, in order to improve the representativeness of the obtained heavy calcium powder sample, the heavy calcium powder sample initially delivered to the sample collection tank 200 can be directly discarded without separating the heavy calcium powder sample from the airflow: open the second electromagnetic two-way valve 210, open the third electromagnetic two-way valve 240, open the second electromagnetic three-way valve 260 to connect the sample collection tank 200 and the powder delivery main pipeline 20, turn on the fan 250 to input air into the sample collection tank 200 (air volume 2-4m 3 / h), so that the heavy calcium powder sample initially delivered to the sample collection tank 200 is mixed with the airflow and output to the powder delivery main pipeline 20, and the discarded heavy calcium powder sample is recovered by the powder main pipeline, which is conducive to reducing waste.

[0042] In some specific embodiments, the volume range of the sample transport tank 100 is 20 to 30 L. If the volume of the sample transport tank 100 is less than 20 L, it is not conducive to suspending the heavy calcium powder sample, resulting in poor pneumatic conveying effect of the heavy calcium powder sample; if the volume of the sample transport tank 100 is greater than 30 L, it occupies a large space and will also increase operating costs.

[0043] In some specific embodiments, the volume range of the sample collection tank 200 is 50 to 60 L. If the volume of the sample collection tank 200 is less than 50 L, it is difficult to install a filter 230 with a large enough surface area, which affects the efficiency of gas-solid separation; if the volume of the sample collection tank 200 is greater than 60 L, it occupies a large space, wasting precious space in the testing workshop.

[0044] Figure 4 The schematic diagram of the jet trajectory of the compressed air injection head in the embodiment of the present invention is shown, and the jet trajectories of the compressed air injection heads 120 intersect at the lower part of the sample delivery tank 100 to form a mixing point. The lower part of the sample delivery tank 100 is a first inverted cone-shaped structure, and the mixing point is located at the vertex of the first inverted cone-shaped structure. In this way, strong mixing and disturbance can be formed at the vertex of the first inverted cone-shaped structure, which can fully impact the heavy calcium powder sample, suspend the heavy calcium powder sample, and facilitate the pneumatic delivery of the heavy calcium powder sample; at the same time, this is also conducive to improving the efficiency of the heavy calcium powder sample out of the tank.

[0045] For details, please refer to Figure 2 The upper part of the sample transport tank 100 is connected to three compressed air injection heads 120, and the three compressed air injection heads 120 are evenly distributed around the first electromagnetic two-way valve 110. This can ensure that the airflow is more evenly distributed in the sample transport tank 100, avoiding excessive or weak airflow in local areas, thereby improving the suspension and transportation efficiency of the heavy calcium powder sample.

[0046] In some specific embodiments, a plurality of first pipeline boosting devices 310 are provided on the sample pneumatic conveying pipeline 300, and a plurality of second pipeline boosting devices are provided on the sample pneumatic recovery pipeline 400. During the pneumatic conveying process, the heavy calcium powder sample needs to be transported over a long distance through a pipeline, but due to factors such as pipeline friction and elbow loss, the heavy calcium powder sample will encounter resistance during the transportation process, resulting in a decrease in pressure, which affects the pneumatic conveying distance; by providing a pipeline boosting device in the pipeline, the pressure of the pipeline can be increased to ensure that the heavy calcium powder sample can overcome these resistances and smoothly pass through the pipeline to the destination.

[0047] Specifically, a first pipeline booster 310 is provided every 100 meters on the sample pneumatic conveying pipeline 300, and a second pipeline booster is provided every 100 meters on the sample pneumatic recovery pipeline 400. This can ensure smooth conveyance of the heavy calcium powder sample and reduce the risk of blockage.

[0048] Figure 5 A schematic structural diagram of the first pipeline boosting device in an embodiment of the present invention is shown, wherein the first pipeline boosting device 310 comprises a first blower 311, and a first boosting pipeline 312 connected to the air outlet of the first blower 311, the first boosting pipeline 312 is connected to a first feed branch pipe 313, a first angle α is formed between the first feed branch pipe 313 and the first boosting pipeline 312, and the angle range of the first angle α is 15° to 45°, and the feed end of the first feed branch pipe 313 and the discharge end of the first boosting pipeline 312 are both connected to the sample pneumatic conveying pipeline 300. The first feed branch pipe 313 and the first boosting pipe 312 are connected in series in the sample pneumatic conveying pipe 300. The heavy calcium powder sample in the sample pneumatic conveying pipe 300 is input into the first boosting pipe 312 from the first feed branch pipe 313. The first feed branch pipe 313 and the first boosting pipe 312 form an angle of 15° to 45°, which is beneficial to reduce the power loss in the conveying process of the heavy calcium powder sample. The first blower 311 can boost the power of the heavy calcium powder sample in the first boosting pipe 312 by blowing air, so that the heavy calcium powder sample obtains sufficient power and can continue to move smoothly in the sample pneumatic conveying pipe 300.

[0049] The air outlet of the first blower 311 is provided with a first check valve, which can prevent the heavy calcium powder sample in the first boosting pipeline 312 from flowing back into the first blower 311 .

[0050] Specifically, the structure of the second pipeline boosting device is the same as that of the first pipeline boosting device. The second pipeline boosting device includes a second blower and a second boosting pipeline connected to the air outlet of the second blower. The second boosting pipeline is connected to a second feed branch pipe. A second angle is formed between the second feed branch pipe and the second boosting pipeline. The angle range of the second angle is 15° to 45°. The feed end of the second feed branch pipe and the discharge end of the second boosting pipeline are both connected to the sample pneumatic recovery pipeline 400. The second feed branch and the second boosting pipe are connected in series in the sample pneumatic recovery pipe 400. The heavy calcium powder sample in the sample pneumatic recovery pipe 400 is input into the second boosting pipe from the second feed branch. The second feed branch and the second boosting pipe also form an angle of 15° to 45°, which is beneficial to reduce the power loss in the transportation process of the heavy calcium powder sample. The second blower can boost the power of the heavy calcium powder sample in the second boosting pipe by blowing air, so that the heavy calcium powder sample obtains sufficient power and can continue to move smoothly in the sample pneumatic recovery pipe 400.

[0051] Among them, the air outlet of the second blower is provided with a second check valve, which can prevent the heavy calcium powder sample in the second boosting pipeline from flowing back into the second blower.

[0052] In general, the structures of the first pipeline boosting device 310 and the second pipeline boosting device are relatively simple, and can be flexibly installed at any position on the corresponding pipeline. They are also easy to maintain, thus reducing the operating cost.

[0053] In some specific embodiments, the sample pneumatic conveying pipeline 300 and the sample pneumatic recovery pipeline 400 are both provided with a plurality of flow sensors and a plurality of pressure sensors to facilitate the detection of the flow state of the heavy calcium powder sample.

[0054] Specifically, on the sample pneumatic conveying pipeline 300 and the sample pneumatic recovery pipeline 400, a flow sensor is arranged every 50 meters, and a pressure sensor is arranged every 50 meters, so as to effectively monitor the operation status of the pipeline.

[0055] In some specific embodiments, a plurality of safety valves are provided on the sample pneumatic conveying pipeline 300 and the sample pneumatic recovery pipeline 400. The safety valves are used to automatically release excessive pipeline pressure to avoid excessive pressure in the pipeline and ensure the operational safety of the heavy calcium powder sampling system.

[0056] Specifically, a safety valve is provided every 100 meters on the sample pneumatic conveying pipeline 300 and the sample pneumatic recovery pipeline 400, which can effectively ensure the operational safety of the pipelines.

[0057] In some specific embodiments, the heavy calcium powder sampling system further includes a sampling control terminal installed in the testing workshop, and the sampling control terminal is used to control the entire heavy calcium powder sampling system.

[0058] Specifically, the first solenoid two-way valve 110, the compressed air injection head 120, the first solenoid three-way valve 130, the second solenoid two-way valve 210, the third solenoid two-way valve 240, the fan 250, the second solenoid three-way valve 260, the first pipeline booster device 310, the second pipeline booster device, the flow sensor and the pressure sensor are all connected to the sampling control terminal, which is convenient for the staff of the testing workshop to control the heavy calcium powder sampling system.

[0059] Furthermore, the sampling control terminal has a programmable logic controller (PLC) and a human-machine interface (HMI). The PLC can realize the automation of the sampling steps, and the HMI can monitor the status of the heavy calcium powder sampling system, adjust parameters, view historical records, etc., which is conducive to realizing intelligent sampling and high sampling efficiency.

[0060] Figure 6 A second structural schematic diagram of the heavy calcium powder sampling system in an embodiment of the present invention is shown, and a plurality of sample conveying tanks 100 may be provided, and each sample conveying tank 100 is connected to a different dust collector, for receiving the heavy calcium powder sample output by the corresponding dust collector; the plurality of sample conveying tanks 100 are connected to the powder conveying main pipeline 20 and the sample pneumatic conveying pipeline 300 through corresponding electromagnetic three-way valves, and the plurality of sample conveying tanks 100 form a parallel structure, that is, the plurality of sample conveying tanks 100 can share a sample collection tank 200, which can simplify the sampling system and improve the sampling efficiency; the plurality of sample conveying tanks 100 are controlled by the sampling control terminal, and any sample conveying tank 100 can be connected to the sample pneumatic conveying pipeline 300 individually, or any sample conveying tank 100 can be connected to the powder conveying main pipeline 20 individually, which is highly convenient.

[0061] The heavy calcium powder sampling system of the present invention has a sample conveying tank 100 installed in the grinding workshop and a sample collecting tank 200 installed in the testing workshop. The sample conveying tank 100 and the sample collecting tank 200 are connected by a sample pneumatic conveying pipeline 300. In this way, the heavy calcium powder sample in the grinding workshop can be directly transported to the testing workshop by pneumatic conveying. There is no need for manual on-site sampling in the grinding workshop, which avoids high-altitude operations, has good safety and high work efficiency.

[0062] Moreover, the sample transport tank 100 cooperates with the first electromagnetic two-way valve 110, the first electromagnetic three-way valve 130 and the compressed air injection head 120, and the sample collection tank 200 cooperates with the second electromagnetic two-way valve 210, the third electromagnetic two-way valve 240, the air inlet and outlet channel 220, the filter 230, the fan 250 and the second electromagnetic three-way valve 260, so as to realize different functions and effects, which is beneficial to reduce the contamination of the heavy calcium powder sample, ensure the purity of the heavy calcium powder sample, and also help to improve the representativeness of the obtained heavy calcium powder sample, and can also reduce the waste of heavy calcium powder samples and reduce dust.

[0063] In addition, the heavy calcium powder sampling system can control the first electromagnetic two-way valve 110, the second electromagnetic two-way valve 210, the third electromagnetic two-way valve 240, the first electromagnetic three-way valve 130, the second electromagnetic three-way valve 260, the compressed air injection head 120, the fan 250, the first pipeline booster device 310 and the second pipeline booster device through the sampling control terminal. The sampling control terminal has a programmable logic controller (PLC) and a human-machine interface (HMI), which is conducive to realizing intelligent sampling and high sampling efficiency.

[0064] In addition, a plurality of sample transport tanks 100 may be provided, and the plurality of sample transport tanks 100 may share one sample collection tank 200 , which can simplify the sampling system and improve the sampling efficiency.

[0065] The above is a detailed introduction to a heavy calcium powder sampling system provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in the field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A heavy calcium powder sampling system, characterized in that: The heavy calcium powder sampling system comprises a sample delivery tank installed in a grinding workshop and a sample collection tank installed in a testing workshop, wherein the sample delivery tank and the sample collection tank are connected via a sample pneumatic delivery pipeline; The sample conveying tank is used to receive the heavy calcium powder sample outputted from the dust collector, and mix the heavy calcium powder sample with the airflow and output it to the sample pneumatic conveying pipeline; The sample collection tank is used to receive the mixture of the heavy calcium powder sample and the airflow output by the sample pneumatic conveying pipeline, and separate the heavy calcium powder sample from the airflow.

2. The heavy calcium powder sampling system according to claim 1, characterized in that: The upper end of the sample conveying tank is connected to the dust collector through a first electromagnetic two-way valve; a plurality of compressed air injection heads are connected to the upper part of the sample conveying tank, and the compressed air injection heads are used to convey compressed air into the sample conveying tank; the lower end of the sample conveying tank is respectively connected to the powder conveying main pipeline and the sample pneumatic conveying pipeline through a first electromagnetic three-way valve; The upper part of the sample collection tank is connected to the sample pneumatic conveying pipeline through a second electromagnetic two-way valve; an air inlet and outlet channel is provided on the top of the sample collection tank, and a filter is provided inside the sample collection tank, one end of the air inlet and outlet channel is connected to the filter, and the other end of the air inlet and outlet channel is connected to a fan through a third electromagnetic two-way valve, and the fan is used to extract the air inside the sample collection tank or to input air into the sample collection tank; the bottom of the sample collection tank is respectively connected to the collection bucket and the powder conveying main pipeline through a second electromagnetic three-way valve, and the second electromagnetic three-way valve is connected to the powder conveying main pipeline through a sample pneumatic recovery pipeline.

3. The heavy calcium powder sampling system according to claim 2, characterized in that: The volume range of the sample transport tank is 20-30L; and / or the volume range of the sample collection tank is 50-60L.

4. The heavy calcium powder sampling system according to claim 2, characterized in that: The jet trajectories of the several compressed air injection heads intersect at the lower part of the sample transport tank to form a mixing point. The lower part of the sample transport tank is a first inverted cone structure. The mixing point is located at the apex of the first inverted cone structure.

5. The heavy calcium powder sampling system according to claim 2, characterized in that: The upper part of the sample transport tank is connected to three compressed air injection heads, and the three compressed air injection heads are distributed at equal intervals around the first electromagnetic two-way valve.

6. The heavy calcium powder sampling system according to claim 2, characterized in that: The sample pneumatic conveying pipeline is provided with a plurality of first pipeline pressurizing devices, and the sample pneumatic recovery pipeline is provided with a plurality of second pipeline pressurizing devices.

7. The heavy calcium powder sampling system according to claim 6, characterized in that: The first pipeline pressurizing device comprises a first blower and a first pressurizing pipeline connected to the air outlet of the first blower, the first pressurizing pipeline is connected to a first feed branch pipe, the angle between the first feed branch pipe and the first pressurizing pipeline is in the range of 15° to 45°, and the feed end of the first feed branch pipe and the discharge end of the first pressurizing pipeline are both connected to the sample pneumatic conveying pipeline; The second pipeline boosting device includes a second blower and a second boosting pipeline connected to the air outlet of the second blower, the second boosting pipeline is connected to a second feed branch, the angle between the second feed branch and the second boosting pipeline is in the range of 15° to 45°, and the feed end of the second feed branch and the discharge end of the second boosting pipeline are both connected to the sample pneumatic recovery pipeline.

8. The heavy calcium powder sampling system according to claim 2, characterized in that: The sample pneumatic conveying pipeline and the sample pneumatic recovery pipeline are both provided with a plurality of flow sensors and a plurality of pressure sensors.

9. The heavy calcium powder sampling system according to claim 2, characterized in that: A plurality of safety valves are arranged on the sample pneumatic conveying pipeline and the sample pneumatic recovery pipeline.

10. The heavy calcium powder sampling system according to claim 1, characterized in that: The heavy calcium powder sampling system also includes a sampling control terminal installed in the testing workshop, and the sampling control terminal is used to control the entire heavy calcium powder sampling system.

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