Mixing sampling system

Abstract

The invention discloses a mixed sampling system, and relates to the technical field of grain detection, the mixed sampling system comprises a sampling machine, a negative pressure bin, a first conveying pipeline, a mixing mechanism, a second conveying pipeline and a sample separating mechanism, the sampling machine is provided with a sampling pipe used for sampling unprocessed grains; negative pressure is formed in the negative pressure bin, and the negative pressure bin is communicated with the sampling pipe through a first conveying pipeline; the first conveying pipeline is arranged between the negative pressure bin and the sampling machine and is communicated with the sampling pipe and the top of the negative pressure bin; the mixing mechanism is arranged below the negative pressure bin and is communicated with the bottom of the negative pressure bin; the second conveying pipeline is arranged between the negative pressure bin and the mixing mechanism and is communicated with the bottom of the mixing mechanism and the top of the negative pressure bin; the sample separating mechanism is arranged at the bottom of the negative pressure bin and is communicated with the bottom of the negative pressure bin. According to the technical scheme provided by the invention, the problems of inaccurate detection result and low representativeness caused by incapability of mixing grains by an existing sampling system are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain detection, and particularly to a mixed sampling system. Background Art

[0002] In the process of grain sampling and processing, physical and chemical detection of grain samples is a key step to ensure grain quality and safety. As a device for extracting grain samples, the design of the sampling machine directly affects the representativeness of the samples and the accuracy of the detection results. Traditional sampling machines insert a hollow sampling rod into the grain pile, and use a negative pressure pipeline to suck the grain samples into the sampling rod, and then extract and divide the samples for subsequent detection.

[0003] However, the negative pressure pipeline in the existing sampling machine only has the function of sample division, that is, dividing the inhaled raw grain according to a set ratio, and does not have the function of mixing. Since there is a sequence in the extraction of grain samples by the sampling machine, the first inserted grain will enter the lower layer of the sample hopper, and the later inserted grain will be in the upper layer of the sample hopper. Using this sampling method, the grains in the sample hopper cannot be fully mixed, resulting in the samples for direct testing not being representative and the detection results not being accurate enough. Summary of the Invention

[0004] The main object of the present invention is to propose a mixed sampling system, aiming to solve the problem that the existing sampling system cannot mix grains, resulting in inaccurate detection results.

[0005] To achieve the above object, the mixed sampling system proposed by the present invention includes:

[0006] A sampling machine with a sampling tube for sampling raw grain;

[0007] A negative pressure bin, which forms a negative pressure inside and is connected to the sampling tube through a first conveying pipeline;

[0008] The first conveying pipeline is arranged between the negative pressure bin and the sampling machine, and connects the top of the sampling tube and the negative pressure bin;

[0009] A mixing mechanism is arranged below the negative pressure bin and is connected to the bottom of the negative pressure bin;

[0010] The second conveying pipeline is arranged between the negative pressure bin and the mixing mechanism, and connects the bottom of the mixing mechanism and the top of the negative pressure bin; and

[0011] A sample division mechanism is arranged at the bottom of the negative pressure bin and is connected to the bottom of the negative pressure bin.

[0012] In an embodiment, the mixing mechanism includes:

[0013] A mixing tank is internally provided with a first mixing chamber and a second mixing chamber, and the bottom of the first mixing chamber communicates with the second mixing chamber. The mixing tank communicates with the negative pressure bin and the second conveying pipeline; and

[0014] A material leveling assembly is arranged near the inlet of the mixing tank. An independent first material passing channel and a second material passing channel are formed on the material leveling assembly. The first material passing channel communicates with the first mixing chamber, and the second material passing channel communicates with the second mixing chamber, so that the material is dispersed by the material leveling assembly and then enters the second mixing chamber for re-mixing.

[0015] In one embodiment, the mixing mechanism further includes a first guiding cover. The outer diameter of the first guiding cover gradually increases from one end close to the top of the mixing tank to the end far from the top of the mixing tank, and a plurality of the material leveling assemblies are arranged at intervals along the bottom periphery of the first guiding cover.

[0016] In one embodiment, the material leveling assembly includes an inner funnel and an outer funnel. The first material passing channel is formed inside the inner funnel, and the second material passing channel is formed inside the outer funnel. The discharge port of the inner funnel faces the first mixing chamber, and the discharge port of the outer funnel faces the second mixing chamber.

[0017] In one embodiment, a pressure regulating pipeline is further arranged on the mixing tank, and the pressure regulating pipeline communicates with the inside of the mixing tank.

[0018] In one embodiment, a guiding chamber is further formed inside the mixing tank. The guiding chamber is located at the inlet of the mixing tank, and the cross-sectional area of the guiding chamber gradually decreases in the direction close to the material leveling assembly.

[0019] In one embodiment, the sample dividing mechanism includes:

[0020] A material dividing tank is communicated with the bottom of the negative pressure bin, and an independent first storage bin and a second storage bin are formed inside;

[0021] A sample grain hopper is arranged below the material dividing tank and communicated with the first storage bin; and a waste hopper is arranged below the material dividing tank and communicated with the second storage bin.

[0022] In one embodiment, the sample dividing mechanism further includes a material dividing assembly. The material dividing assembly is arranged near the inlet of the material dividing tank. The material dividing assembly includes a first sample dividing hopper and a second sample dividing hopper. The discharge port of the first sample dividing hopper faces the first storage bin, and the discharge port of the second sample dividing hopper faces the second storage bin.

[0023] In one embodiment, the sample dividing mechanism further includes a second flow guide cover, the outer diameter of the second flow guide cover gradually increases from one end close to the top of the material dividing tank to the end far from the top of the material dividing tank, and a plurality of first sample dividing hoppers and second sample dividing hoppers are respectively arranged at intervals along the bottom periphery of the second flow guide cover.

[0024] In one embodiment, the hybrid sampling system further includes a negative pressure generating device, which is communicated with the negative pressure bin, so that a negative pressure state is generated in the negative pressure bin to suck the raw grain in the first conveying pipeline into the negative pressure bin.

[0025] In one embodiment, the hybrid sampling system further includes a three-way mechanism for communicating the negative pressure bin, the mixing mechanism and the sample dividing mechanism.

[0026] In one embodiment, the hybrid sampling system further includes a back blowing mechanism, which is communicated with the first conveying pipeline and is arranged close to the negative pressure bin.

[0027] In the technical solution of the present invention, after the raw grain sampled in the sampling pipe is conveyed to the negative pressure bin through the first conveying pipeline, by providing a mixing mechanism communicated with the negative pressure bin, the raw grain in the negative pressure bin enters the mixing mechanism for mixing before entering the sample dividing mechanism, and then the mixed grain is conveyed into the negative pressure bin through the second conveying pipeline and finally reaches the sample dividing mechanism for sample dividing and detection. The negative pressure state in the negative pressure bin can provide power for the conveying of the raw grain, and through the first conveying pipeline, the raw grain can be directly conveyed from the sampling pipe to the negative pressure bin, avoiding the loss of the raw grain during the conveying process. At the same time, the negative pressure environment also helps to prevent the diffusion of dust and particulate matter; then it is mixed through the mixing mechanism, which can be mixed once or multiple times, and finally sampled through the sample dividing mechanism. The whole process has a high degree of automation, improving the sampling efficiency and the accuracy of the sampling and detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0029] Figure 1 Structural schematic diagram of an embodiment of the hybrid sampling system provided by the present invention;

[0030] Figure 2 Structural schematic diagram of the mixing mechanism in another embodiment of the hybrid sampling system provided by the present invention;

[0031] Figure 3 This is a schematic structural diagram of the sample dividing tank in another embodiment of the hybrid sampling system provided by the present invention.

[0032] Explanation of the reference numerals in the drawings:

[0033] 100, hybrid sampling system; 1, sampling machine; 2, negative pressure bin; 3, first conveying pipeline; 4, mixing mechanism; 41, mixing tank; 411, first mixing chamber; 412, second mixing chamber; 413, pressure regulating pipeline; 414, guiding chamber; 42, material leveling assembly; 421, inner funnel; 422, outer funnel; 43, first flow guiding cover; 5, second conveying pipeline; 6, sample dividing mechanism; 61, material dividing tank; 611, first storage bin; 612, second storage bin; 62, sample hopper; 63, waste hopper; 64, material dividing assembly; 641, first sample dividing hopper; 642, second sample dividing hopper; 65, second flow guiding cover; 7, negative pressure generating device; 71, dust collector; 8, three-way mechanism; 9, back blowing mechanism.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if the embodiments of the present invention involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The negative pressure pipeline in the existing sampling machine only has the function of sample division, that is, the raw grain sucked in is divided according to a set ratio, and does not have the function of mixing. Since there is a sequence in the extraction of grain samples by the sampling machine, the grain inserted first will enter the lower layer of the sample hopper, and the grain inserted later will be in the upper layer of the sample hopper. Using this sampling method, the grain in the sample hopper cannot be fully mixed, resulting in the sample for direct testing not being representative and the test results not being accurate enough.

[0039] The present invention proposes a mixed sampling system.

[0040] Please refer to Figure 1 , in an embodiment of the present invention, the mixed sampling system 100 includes:

[0041] A sampling machine 1 having a sampling tube for sampling raw grain;

[0042] A negative pressure bin 2 with negative pressure formed inside and connected to the sampling tube through a first conveying pipeline 3;

[0043] The first conveying pipeline 3 is arranged between the negative pressure bin 2 and the sampling machine 1 and connects the top of the sampling tube and the negative pressure bin 2;

[0044] A mixing mechanism 4 is arranged below the negative pressure bin 2 and is connected to the bottom of the negative pressure bin 2;

[0045] The second conveying pipeline 5 is arranged between the negative pressure bin 2 and the mixing mechanism 4 and connects the bottom of the mixing mechanism 4 and the top of the negative pressure bin 2; and

[0046] A sample dividing mechanism 6 is arranged at the bottom of the negative pressure bin 2 and is connected to the bottom of the negative pressure bin 2.

[0047] In the technical solution of the present invention, after the first conveying pipeline 3 conveys the raw grain sampled from the sampling tube to the negative pressure bin 2, by setting a mixing mechanism 4 communicated with the negative pressure bin 2, the raw grain in the negative pressure bin 2 enters the mixing mechanism 4 for mixing before entering the sample dividing mechanism 6, and then the mixed grain is conveyed into the negative pressure bin 2 by the second conveying pipeline 5, and finally reaches the sample dividing mechanism 6 for sample dividing and detection. The negative pressure state in the negative pressure bin 2 can provide power for the conveying of the raw grain, and through the first conveying pipeline 3, the raw grain can be directly conveyed from the sampling tube to the negative pressure bin 2, avoiding the loss of the raw grain during the conveying process. At the same time, the negative pressure environment also helps to prevent the diffusion of dust and particulate matter; then it is mixed through the mixing mechanism 4, which can be mixed once or multiple times, and finally the sample is divided through the sample dividing mechanism 6. The whole process has a high degree of automation, improving the sampling efficiency and the accuracy of the sampling and detection results.

[0048] Specifically, the mixing mechanism 4 can be a rotating container with stirring blades for mixing the raw grain. For example, it can be a cylindrical or conical container with multiple stirring blades inside, and the rotation of the stirring blades is driven by a motor to achieve one or multiple mixings of the raw grain. The second conveying pipeline 5 can be a pipeline connecting the mixing mechanism 4 and the negative pressure bin 2 for conveying the mixed raw grain back to the negative pressure bin 2; the first conveying pipeline 3 can be a pipeline connecting the sampling tube and the negative pressure bin 2 for conveying the raw grain from the sampling tube to the negative pressure bin 2. There are no specific limitations on the set length and diameter of the first conveying pipeline 3 and the second conveying pipeline 5. The sample dividing mechanism 6 can be a sampler with multiple outlets for dividing the mixed raw grain into multiple samples. For example, it can be a funnel-shaped structure with multiple outlets, and different proportions of sample division can be achieved by adjusting the size and number of the outlets. The negative pressure bin 2 can be a closed container, and a negative pressure environment is formed inside through an air extraction system. For example, it can be a stainless steel container, with an interface for connecting the first conveying pipeline 3 at the top and interfaces for connecting the second conveying pipeline 5 and the sample dividing mechanism 6 at the bottom.

[0049] In an embodiment of the present invention, please refer to Figure 2 , the mixing mechanism 4 includes:

[0050] A mixing tank 41, which is internally provided with a first mixing chamber 411 and a second mixing chamber 412, and the bottom of the first mixing chamber 411 is communicated with the second mixing chamber 412. The mixing tank 41 is communicated with the negative pressure bin 2 and the second conveying pipeline 5; and

[0051] A material leveling component 42, which is arranged near the inlet of the mixing tank 41. An independent first material passing channel and a second material passing channel are formed on the material leveling component 42. The first material passing channel is communicated with the first mixing chamber 411, and the second material passing channel is communicated with the second mixing chamber 412, so that the material is dispersed through the material leveling component 42 and then enters the first mixing chamber 411 and the second mixing chamber 412.

[0052] Specifically, the material leveling component 42 can be a funnel-shaped structure with multiple dispersion plates. These dispersion plates can be a series of parallel baffles used to disperse the material flow. After being dispersed by the dispersion plates, the material enters the first material passing channel and the second material passing channel respectively, and then enters the corresponding mixing chambers. After the material in the first mixing chamber 411 reaches the bottom, it will converge into the second mixing chamber 412 to complete the final mixing and form the mixed grain. The dispersion plates can also be set at different angles and shapes to adapt to different material characteristics and mixing requirements. The setting of the material leveling component 42 effectively disperses the material before it enters the mixing chamber, reduces the accumulation and uneven distribution of the material during the mixing process, and optimizes the material flow path. The mixing tank 41 can be a cylindrical container, and its interior is divided into two independent mixing chambers by a partition. By setting the independent first mixing chamber 411 and second mixing chamber 412, as well as the corresponding first material passing channel and second material passing channel, the material is dispersed by the material leveling component 42 before entering the mixing chamber, which helps to improve the mixing uniformity and ensure the consistency of the quality of the mixed material.

[0053] In an embodiment of the present invention, please refer to Figure 2 , the mixing mechanism 4 further includes a first guide cover 43. The outer diameter of the first guide cover 43 gradually increases from one end close to the top of the mixing tank 41 to the end far from the top of the mixing tank 41, and a plurality of material leveling components 42 are arranged at intervals along the bottom periphery of the first guide cover 43. Since the first guide cover 43 has a conical or truncated conical structure with an outer diameter gradually increasing, the raw materials are evenly dispersed from the vertex of the first guide cover 43 located at the center of the inlet of the mixing tank 41 to the surroundings and then fall into the multiple material leveling components 42 below. It is equivalent to being preliminarily pre-dispersed on the surface of the first guide cover 43 first, and then evenly falling on the circumference at the bottom of the first guide cover 43. Subsequently, the material is further mixed and dispersed by the material leveling component 42. Finally, the material entering the first mixing chamber 411 enters the second mixing chamber 412 to complete the final mixing, improving the mixing uniformity.

[0054] In an embodiment of the present invention, please refer to Figure 2, the material leveling component 42 includes an inner funnel 421 and an outer funnel 422. A first material passing channel is formed inside the inner funnel 421, and a second material passing channel is formed inside the outer funnel 422. Moreover, the discharge port of the inner funnel 421 faces the first mixing chamber 411, and the discharge port of the outer funnel 422 faces the second mixing chamber 412. Multiple inner funnels 421 and multiple outer funnels 422 can be provided below the first diversion cover 43. The multiple inner funnels 421 and multiple outer funnels 422 are evenly spaced. That is to say, the materials reaching the bottom of the first diversion cover 43 will evenly fall into the multiple inner and outer funnels 422, forming multiple different flow paths. Then, the materials in the inner funnel 421 enter the first mixing chamber 411, and the materials in the outer funnel 422 enter the second mixing chamber 412. Finally, the materials in the first mixing chamber 411 converge into the second mixing chamber 412 to form mixed grains. When the mixed grains are sucked out of the mixing tank 41, the mixed grains at the central position of the mixing tank 41 flow out first, making the mixing more uniform. At this time, a complete sample mixing is completed.

[0055] In an embodiment of the present invention, please refer to Figure 2 , a pressure regulating pipeline 413 is further provided on the mixing tank 41, and the pressure regulating pipeline 413 is communicated with the inside of the mixing tank 41. The pressure regulating pipeline 413 can include a pressure regulating valve and a connecting pipeline. For example, it can be a stainless steel pipeline with a manual or automatic pressure regulating valve. The pressure regulating pipeline 413 is communicated with the inside of the mixing tank 41 to adjust and control the pressure inside the mixing tank 41, ensuring that the mixing process is carried out under suitable pressure conditions.

[0056] In an embodiment of the present invention, please refer to Figure 2 , a guiding cavity 414 is further formed inside the mixing tank 41. The guiding cavity 414 is located at the entrance of the mixing tank 41, and the cross-sectional area of the guiding cavity 414 gradually decreases in the direction close to the material leveling component 42. The guiding cavity 414 can be designed as a truncated cone structure and is located at the entrance of the mixing tank 41. The gradually decreasing cross-sectional area of the guiding cavity 414 helps to concentrate the material flow, reducing the splashing and scattering of materials during the mixing process. Moreover, the cross-sectional area of the guiding cavity 414 gradually decreases in the direction close to the material leveling component 42, which helps to guide the materials to the material leveling component 42 and gradually accelerate during the flowing process, improving the mixing efficiency.

[0057] In an embodiment of the present invention, please refer to Figure 1 , the sample dividing mechanism 6 includes:

[0058] A sample dividing tank 61, which is communicated with the bottom of the negative pressure bin 2 and has an independent first storage bin 611 and second storage bin 612 formed inside;

[0059] A sample grain hopper, which is arranged below the sample dividing tank 61 and is communicated with the first storage bin 611; and

[0060] The waste hopper 63 is provided below the material distribution tank 61 and is communicated with the second storage bin 612.

[0061] Specifically, the material distribution tank 61 can be designed as a container with a partition plate. The partition plate divides the interior of the tank into two independent storage bins, enabling the sample grains and waste to be stored and processed separately, effectively preventing the mixing between the sample grains and waste, and ensuring the purity of the samples. The sample grain hopper can be a funnel-shaped structure located below the material distribution tank 61, communicated with the first storage bin 611, and collecting the sample grains from the first storage bin 611. The setting of the sample grain hopper facilitates the inspection and analysis of the samples. The waste hopper 63 can be a funnel-shaped structure located below the material distribution tank 61, communicated with the second storage bin 612, and collecting the waste conveyed from the second storage bin 612. The setting of the waste hopper 63 helps to centrally process the waste, reduce manual input, and lower the workload.

[0062] In an embodiment of the present invention, please refer to Figure 3 , the sample distribution mechanism 6 further includes a material distribution component 64. The material distribution component 64 is arranged near the inlet of the material distribution tank 61. The material distribution component 64 includes a first sample distribution hopper 641 and a second sample distribution hopper 642. The discharge port of the first sample distribution hopper 641 faces the first storage bin 611, and the discharge port of the second sample distribution hopper 642 faces the second storage bin 612. The material distribution component 64 can be a frame, and two funnel-shaped sample distribution hoppers are installed on the frame. The setting ratio of the first sample distribution hopper 641 and the second sample distribution hopper 642 is allocated according to requirements, so as to adjust the sample distribution ratio. Moreover, the materials in the first sample distribution hopper 641 and the second sample distribution hopper 642 respectively enter the first storage bin 611 and the second storage bin 612, and then enter the sample hopper 62 and the waste hopper 63 respectively.

[0063] In an embodiment of the present invention, please refer to Figure 3 , the sample distribution mechanism 6 further includes a second flow guide cover 65. The outer diameter of the second flow guide cover 65 gradually increases from one end close to the top of the material distribution tank 61 to the end far from the top of the material distribution tank 61, and a plurality of first sample distribution hoppers 641 and second sample distribution hoppers 642 are respectively arranged at intervals along the bottom periphery of the second flow guide cover 65. Since the second flow guide cover 65 is in a conical or frustum-shaped structure with a gradually increasing outer diameter, the raw materials are evenly dispersed from the vertex of the second flow guide cover 65 located at the center of the inlet of the material distribution tank 61 to the surrounding areas and then fall into the plurality of sample distribution hoppers below. It is equivalent to first performing preliminary pre-dispersion on the surface of the second flow guide cover 65 and then evenly falling onto the circumference at the bottom of the second flow guide cover 65, and then the plurality of sample distribution hoppers further complete the separation of the plurality of sample grains and waste grains.

[0064] In an embodiment of the present invention, please refer to Figure 1, the hybrid sampling system 100 further includes a negative pressure generating device 7. The negative pressure generating device 7 is connected to the negative pressure bin 2, so that a negative pressure state is generated in the negative pressure bin 2 to suck the raw grain in the first conveying pipeline 3 into the negative pressure bin 2. The negative pressure generating device 7 can be a vacuum pump or a blower, which is used to generate negative pressure in the negative pressure bin 2. For example, it can be a centrifugal blower, and its power and rotation speed can be adjusted according to needs to generate the required negative pressure. The negative pressure generating device 7 is connected to the negative pressure bin 2. By generating negative pressure, the raw grain in the first conveying pipeline 3 and the mixed grain in the second conveying pipeline 5 are sucked into the negative pressure bin 2. Optionally, a dust collector 71 can also be provided in the sampling system. The negative pressure generating device 7 is connected to the negative pressure bin 2 through the dust collector 71, so that the air flow sucked from the negative pressure bin 2 first passes through the dust collector 71 to filter dust impurities and then enters the negative pressure generating device 7 to ensure the purity of the air flow inside the negative pressure generating device 7.

[0065] In an embodiment of the present invention, please refer to Figure 1 , the hybrid sampling system 100 further includes a three-way mechanism 8. The three-way mechanism 8 is used to connect the negative pressure bin 2, the mixing mechanism 4 and the sample dividing mechanism 6. The three-way mechanism 8 can be a control valve with three pipe interfaces, which is used to control the material flow direction. For example, it can be a three-way valve made of stainless steel, and each interface is equipped with a sealing ring to ensure the sealing performance. The three paths of the three-way mechanism 8 are respectively used to connect the negative pressure bin 2, the mixing mechanism 4 and the sample dividing mechanism 6. By rotating or switching the valve body, the flow direction of the material flowing out of the negative pressure bin 2 is controlled. The three-way mechanism 8 includes a first path connected to the three-way mechanism 8 and a second path connected to the sample dividing mechanism 6. When the raw grain needs to be mixed, the first path is opened, and the raw grain enters the mixing mechanism 4; when the raw grain needs to be divided, the second path is opened, and the raw grain enters the sample dividing mechanism 6.

[0066] In an embodiment of the present invention, please refer to Figure 1 , the hybrid sampling system 100 further includes a backwashing mechanism 9. The backwashing mechanism 9 is connected to the first conveying pipeline 3 and is arranged close to the negative pressure bin 2. Since the distance between the sampling machine 1 and the negative pressure bin 2 is relatively far, the first conveying pipeline 3 has the longest line and the most bends. During the sampling process, due to the fact that the grain contains more impurities, such as straws and rice straws, it is easy to cause blockage. Therefore, a backwashing component is provided in the first conveying pipeline 3. The backwashing component includes an external air source (such as a compressed air tank) and a third valve (such as a solenoid valve). During the sampling process, if the first conveying pipeline 3 is blocked, at this time, the first valve is closed, the third valve is opened, and the external air source is connected to the first conveying pipeline 3. The high-pressure gas provided by the external air source blows in the opposite direction into the first conveying pipeline 3 to conduct dredging.

[0067] Optionally, as an optimization solution, some of the solutions in the above embodiments can also be combined according to actual needs to form a new implementation solution. During the specific implementation process, according to actual needs, a first valve can also be provided on the first conveying pipeline 3, a second valve can be provided on the second conveying pipeline 5, and a third valve can be set in the backflush assembly. When the sampler 1 performs the sampling work, the first valve is opened, the second valve and the third valve are both closed, and the three-way mechanism 8 is in a closed state, so that the negative pressure bin 2 is connected to the sampler 1 through the first conveying pipeline 3. At the same time, the negative pressure generating device 7 starts to operate, generating a large amount of negative pressure to suck the grain into the negative pressure bin 2. After sampling is completed, the first valve and the third valve are closed, and the first passage in the three-way mechanism 8 is opened, and the raw grain enters the mixing mechanism 4 to form mixed grain. At this time, the pressure regulating pipeline 413 automatically closes to prevent dust from overflowing. Subsequently, the three-way mechanism 8 is closed, the second valve is opened, and the negative pressure bin 2 is connected to the mixing mechanism 4 through the second conveying pipeline 5, and the mixed grain enters the negative pressure bin 2, and the raw grain completes one mixing. During this process, the pressure regulating pipeline 413 is opened to automatically balance the pressure in the mixing mechanism 4. Optionally, the number of mixing times can be set manually. After mixing is completed, the negative pressure generating device 7 is closed, and the second passage of the three-way mechanism 8 is opened, and the raw grain enters the sample splitting mechanism 6 from the negative pressure bin 2 to complete the sample splitting of the sample grain and the waste grain in proportion. This solution can not only realize the functions of the sampler 1 for sucking grain and sample splitting, but also integrate the function of mixing the sample grain, making the inhaled raw grain fully mixed, making the obtained sample more representative, and the sampling detection result more accurate.

[0068] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the technical concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A hybrid sampling system, characterized in that: The hybrid sampling system comprises: A sampling machine, having a sampling tube for sampling raw grains; A negative pressure chamber, in which negative pressure is formed and which is connected to the sampling tube through a first delivery pipeline; A first conveying pipeline is provided between the negative pressure chamber and the sampling machine, and is connected with the sampling tube and the top of the negative pressure chamber; A mixing mechanism is disposed below the negative pressure chamber and communicated with the bottom of the negative pressure chamber; a second delivery pipeline, disposed between the negative pressure chamber and the mixing mechanism, and communicating with the bottom of the mixing mechanism and the top of the negative pressure chamber; and The sample sorting mechanism is arranged at the bottom of the negative pressure chamber and is communicated with the bottom of the negative pressure chamber.

2. The hybrid sampling system according to claim 1, characterized in that: The mixing mechanism comprises: a mixing tank, wherein a first mixing chamber and a second mixing chamber are provided inside, and the bottom of the first mixing chamber is communicated with the second mixing chamber, and the mixing tank is connected with the negative pressure chamber and the second delivery pipeline; and A material mixing assembly is arranged near the inlet of the mixing tank, and is provided with an independent first material passage and a second material passage. The first material passage is connected to the first mixing chamber, and the second material passage is connected to the second mixing chamber, so that the material can be dispersed by the material mixing assembly and then enter the second mixing chamber for remixing.

3. The hybrid sampling system according to claim 2, characterized in that: The mixing mechanism also includes a first flow guide cover, the outer diameter of which gradually increases from one end close to the top of the mixing tank to one end away from the top of the mixing tank, and a plurality of material leveling assemblies are arranged at intervals along the bottom periphery of the first flow guide cover.

4. The hybrid sampling system according to claim 3, characterized in that: The material mixing assembly includes an inner funnel and an outer funnel. The first material passage is formed in the inner funnel, the second material passage is formed in the outer funnel, and the discharge port of the inner funnel faces the first mixing chamber, while the discharge port of the outer funnel faces the second mixing chamber.

5. The hybrid sampling system according to claim 2, characterized in that: The mixing tank is also provided with a pressure regulating pipeline, and the pressure regulating pipeline is connected to the interior of the mixing tank; and / or, A guide cavity is also formed inside the mixing tank. The guide cavity is located at the inlet of the mixing tank, and the cross-sectional area of ​​the guide cavity gradually decreases in the direction approaching the material sparging assembly.

6. The hybrid sampling system according to claim 1, characterized in that: The sample separation mechanism comprises: A material distribution tank is connected to the bottom of the negative pressure bin, and forms an independent first storage bin and a second storage bin inside. A sample grain hopper is disposed below the material distribution tank and is connected to the first material storage bin; and The waste hopper is arranged below the material distribution tank and is communicated with the second material storage bin.

7. The hybrid sampling system according to claim 6, characterized in that: The sampling mechanism also includes a sampling assembly, which is arranged near the inlet of the sampling tank. The sampling assembly includes a first sampling hopper and a second sampling hopper. The discharge port of the first sampling hopper faces the first storage bin, and the discharge port of the second sampling hopper faces the second storage bin.

8. The hybrid sampling system according to claim 7, characterized in that: The sampling mechanism also includes a second flow guide cover, the outer diameter of which gradually increases from one end close to the top of the material separation tank to the end far from the top of the material separation tank, and the first sample dividing hopper and the second sample dividing hopper are both provided with multiple intervals along the bottom periphery of the second flow guide cover.

9. The hybrid sampling system according to claim 1, characterized in that: The mixed sampling system also includes a negative pressure generating device, which is connected to the negative pressure bin, so that a negative pressure state is generated in the negative pressure bin to suck the raw grain in the first conveying pipeline into the negative pressure bin.

10. The hybrid sampling system according to any one of claims 1 to 9, characterized in that: The mixed sampling system further comprises a three-way mechanism, which is used to connect the negative pressure chamber, the mixing mechanism and the sampling mechanism; and / or, The mixed sampling system also includes a backflush mechanism, which is connected to the first conveying pipeline and is arranged close to the negative pressure chamber.

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