A multi-section active sampler

Abstract

The utility model discloses a kind of multi-section active sampler, including feed pipe and several groups of active sampling mechanism, and several groups of first hole and second hole are set on the side wall of feed pipe;Each group of active sampling mechanism includes guide tube and is used for sampling the sampling tube of material in feed pipe, guide tube is connected feed pipe and corresponds first hole, sampling tube is moved in guide tube and corresponds a group of first hole and second hole for sampling tube to pass through.The utility model solves the technical problem of how to improve the sampling accuracy of active sampler in the prior art.

Description

Technical Field

[0001] This utility model relates to the sampling mechanism of a metrological testing device, and in particular to a multi-section active sampler. Background Technology

[0002] Currently, both internationally and domestically, the corn seed production and sales industry uses a seed count-based sales method. Taking corn seeds as an example, this method requires ensuring that each package contains the correct number of seeds to guarantee the number of corn plants planted per unit area. It also requires that each package have a consistent weight to satisfy farmers' habits regarding weight. Therefore, the corn seed production industry now uses a thousand-kernel weight substitution method to convert the weight into the target weight for packaging.

[0003] The key to the thousand-grain weight substitution method lies in the accuracy of sampling, which can be divided into two different methods: gravity-flow passive sampling and active sampling. For details on gravity-flow passive samplers, please refer to [link to relevant documentation]. Figure 1 Material (such as corn kernels) falls freely and flows out of the sampling tube. For active samplers, see existing patent document (CN203443801U), where a cylinder drives the sampling tube to cross-section and collect corn kernels.

[0004] As is well known, the kernels of corn vary in shape and size at the head, middle, and tail of the cob. In kernel kinematics, the speed and state of movement of different kernel sizes differ; larger kernels move faster and usually float on the surface, while smaller kernels move slower and usually sink to the bottom. Gravity-fed samplers allow corn kernels to flow freely, resulting in samples that are not representative at all, and the measured thousand-kernel weight is also inaccurate. Without screening and grading, the packaging error for 4400 kernels / bag often reaches 200-300 kernels / bag or more.

[0005] The active sampler is an active single-section sampler. Compared with the gravity-flow passive sampler, this sampler has significantly improved sampling accuracy. In a 4400-particle / bag packaging, the measured error is generally 80-100 particles / bag. Although the accuracy of the single-section active sampler is improved compared to the passive sampler, the sampling cross-sectional area is too small. The ratio of the sampling cross-sectional area to the feed tube cross-sectional area is about 30-40%, which affects the accuracy of the thousand-particle weight due to insufficient sample surface area. The generality of the sample is greatly limited, thus affecting the sampling accuracy.

[0006] Therefore, improving the sampling accuracy of active samplers has become a technical problem that needs to be solved. Utility Model Content

[0007] The purpose of this invention is to provide a multi-section active sampler, which solves the technical problem of how to improve the sampling accuracy of active samplers in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a multi-section active sampler, characterized in that: the multi-section active sampler includes a feed pipe and several sets of active sampling mechanisms, and several sets of first holes and second holes are opened on the side wall of the feed pipe;

[0009] Each active sampling mechanism includes a guide tube and a sampling tube for sampling the material in the feed tube. The guide tube is connected to the feed tube and corresponds to the first hole. The sampling tube moves inside the guide tube and corresponds to a first hole and a second hole through which the sampling tube passes.

[0010] Furthermore, the sampling tubes of several groups of active sampling mechanisms are located at different heights on the feed pipe;

[0011] And / or several sampling tubes of several groups of active sampling mechanisms have different tilt angles.

[0012] Furthermore, the multi-section active sampler includes three sets of active sampling mechanisms and three sets of first and second holes. The center line connecting the first and second holes of each set is projected onto the horizontal plane. The three projections divide the horizontal projection of the feed tube into six parts.

[0013] Furthermore, in each group of first and second holes, the height of the first hole is higher than the height of the second hole;

[0014] The sampling tube is tilted at an angle of 45° to 60°.

[0015] Furthermore, the area of ​​the feed pipe used for sampling by the active sampling mechanism is called the sampling section, and the cross-section of the feed pipe in the sampling section is square;

[0016] The first and second holes are respectively located on opposite side walls of the feed pipe in the sampling section.

[0017] Furthermore, several groups of active sampling mechanisms are set up in parallel.

[0018] Furthermore, the end of the guide tube furthest from the feed tube is connected to the first drive mechanism, and the movable end of the first drive mechanism is connected to the sampling tube.

[0019] Furthermore, a sampling gate for controlling the opening and closing of the second hole is provided on the outer side of the side wall of the feed pipe where the second hole is located;

[0020] The outer side of the sidewall of the feeding pipe is also connected to a second drive mechanism for driving the sampling gate to flip and realize the opening and closing of the second hole.

[0021] Furthermore, the sampling gate is connected to a rotating shaft, which is sleeved on a fixed block, and the fixed block is connected to the outer side of the side wall of the feeding pipe; one end of the rotating shaft is connected to the first connecting rod, the first connecting rod and the first connecting head are hinged, and the first connecting head is connected to the movable end of the second drive mechanism;

[0022] Both the first and second drive mechanisms are cylinders.

[0023] Furthermore, the multi-section active sampler includes a collection hopper, which corresponds to the second hole;

[0024] The and / or multi-section active sampler includes a dust cover that covers the openings of the second hole, the sampling gate, and the collection hopper, and a rotating shaft that passes through the dust cover and is connected to the first connecting rod.

[0025] In view of the above technical features, the present invention has the following beneficial effects:

[0026] 1. The present invention provides a multi-section active sampler that expands the sampling cross-sectional area through several sampling tubes of several sets of active sampling mechanisms. The larger the sampling surface, the greater the universality of the sample and the higher the reliability (accuracy). Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a self-flowing passive sampler in the prior art.

[0028] Figure 2 This is a schematic diagram of the structure of a multi-section active sampler in Embodiment 1. Figure 1 .

[0029] Figure 3 This is a schematic diagram of the structure of a multi-section active sampler in Embodiment 1. Figure 2 .

[0030] Figure 4 This is a schematic diagram of the structure of a multi-section active sampler in Embodiment 1. Figure 2 .

[0031] Figure 5 This is a schematic diagram of the structure of a multi-section active sampler in Embodiment 1. Figure 2 .

[0032] Figure 6 This is a perspective view of a multi-section active sampler in Embodiment 2.

[0033] Figure 7 This is a top view of a multi-section active sampler in Embodiment 2.

[0034] Figure 8 This is a side view of a multi-section active sampler in Embodiment 2.

[0035] Figure 9 This is a front view of a multi-section active sampler in Embodiment 2.

[0036] Figure 10This is a perspective view (front view angle) of a multi-section active sampler in Embodiment 2. In the figure: 1, feed pipe; 11, first hole; 12, second hole; 13, sampling section; 14, first sidewall; 15, second sidewall; 16, third sidewall;

[0037] 2. Active sampling mechanism; 21. Guide tube; 22. Sampling tube; 23. First drive mechanism;

[0038] 3. Second drive mechanism; 31. First connector; 32. First connecting rod; 33. Rotating shaft; 34. Fixing block; 35. Sampling gate;

[0039] 4. Material collection hopper;

[0040] 5. Dust cover. Detailed Implementation

[0041] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0042] See Figures 2 to 5 Specific Embodiment 1: This embodiment 1 provides a multi-section active sampler, including a feed pipe 1 and several sets of active sampling mechanisms 2. Several sets of first holes 11 and second holes 12 are formed on the side wall of the feed pipe 1. Each set of active sampling mechanisms 2 includes a guide pipe 21 and a sampling pipe 22 for sampling the material inside the feed pipe 1. The guide pipe 21 connects to the feed pipe 1 and corresponds to the first hole 11. The sampling pipe 22 moves within the guide pipe 21 and corresponds to a set of first holes 11 and second holes 12 through which the sampling pipe 22 passes. At this time, the inclination angle of the sampling pipe 22 is the same as the inclination angle of the guide pipe 21. In each set of first holes 11 and second holes 12, the height of the first hole 11 is higher than the height of the second hole 12, and the inclination angle of the sampling pipe 22 corresponds to the angle connecting the centers of the first hole 11 and the second hole 12. The inclination angle of the sampling pipe 22 is 45° to 60° to ensure that the material inside the sampling pipe 22 can automatically flow out, facilitating subsequent falling into the collection hopper 4.

[0043] This embodiment 1 provides a multi-section active sampler, which uses several sets of active sampling mechanisms 2 to sample simultaneously. Through several sampling tubes 22 of several sets of active sampling mechanisms 2, the sampling cross-sectional area is expanded. The larger the sampling surface, the greater the universality of the sample and the higher the reliability (accuracy).

[0044] The sampling section 13 of the feed pipe 1 has a circular cross-section. Several sampling tubes 22 of several sets of active sampling mechanisms 2 are positioned at different heights on the feed pipe 1; the inclination angles of the sampling tubes 22 of several sets of active sampling mechanisms 2 are also different. By employing several sets of active sampling mechanisms 2 to perform sampling simultaneously, and through the sampling tubes 22 of several sets of active sampling mechanisms 2, the sampling cross-sectional area is expanded. A larger sampling area results in greater sample generality and higher reliability (accuracy). The number and angle of the active sampling mechanisms 2 can be adjusted according to actual conditions.

[0045] The multi-section active sampler includes three sets of active sampling mechanisms 2 and three sets of first holes 11 and second holes 12. The center line connecting the first holes 11 and the second holes 12 of each set is a projection on the horizontal plane. The three projections divide the projection of the horizontal plane of the feed pipe 1 into six parts.

[0046] After adopting three sets of active sampling mechanisms 2 for cross-sectional active sampling, the sampling area and position are expanded by 3 times. Compared with the two single sampling tube 22 modes in the prior art, the multi-section active sampler in this embodiment 2 uses multiple sampling tubes 22 to sample from multiple angles, avoiding dead angles, greatly improving the representativeness of the sample, and the sampling accuracy will be greatly improved.

[0047] For example, if the feed tube has a diameter of φ15cm and the sampling tube has an inner diameter of φ5cm, the cross-sectional area of ​​the feed tube is 15cm * 15cm * 3.14 = 706.5 cm².

[0048] The cross-sectional area of ​​the three sampling tubes (minus the overlapping circle) is 5 cm * 32 cm * 3 - 3.14 * 7.5 cm * 7.5 cm / 4 * 2 = 631.6875 cm²

[0049] The ratio of the total cross-sectional area of ​​the sampling tubes to the cross-sectional area of ​​the supply tubes is 632 cm² / 706 cm² = 0.895, which is approximately 90%.

[0050] The multi-section active sampler in this embodiment 1 has the following effect:

[0051] 1. Increased cross-sectional area ratio

[0052] In existing technologies, when sampling with a single tube, the cross-section of a single sampling tube only covers 30-40% of the cross-section of the feeding tube. After changing to three or more tubes, the total cross-sectional area of ​​the sampling tubes increases to 90% or higher, expanding the coverage area by 3 to 4 times, reducing sampling blind spots, and making the samples more representative.

[0053] 2. In this embodiment 1, the sampling frequency of several groups of active sampling mechanisms 2 is basically consistent with that of the single tube sampler in the prior art, still sampling once every 60-120 seconds (which may vary depending on the packaging specifications), ensuring that the sampling amount per unit time is stable, but the coverage area of ​​a single sampling is increased, reducing random errors.

[0054] 3. Improved accuracy

[0055] In existing technologies, uneven particle distribution during single-tube sampling can lead to localized concentration deviations. Simultaneous multi-tube sampling can balance concentration differences at different locations, improving representativeness. Due to the increased coverage area, the accuracy error of multi-channel samplers can be controlled within ±1% (compared to approximately ±3% for traditional single-tube sampling).

[0056] 4. Data Validation

[0057] In the existing technology, the accuracy of single-tube sampling is ±80-100 particles / bag (approximately ±1.8%-2.3%) when sampling 4400 particles / bag.

[0058] Assuming the total sampling amount remains unchanged, the sampling error of the multi-section active sampler in this embodiment 1 can be reduced to within ±44 seeds / bag (±1%), which is more accurate and meets the requirements of the seed industry standard.

[0059] As can be seen from the above, when the three sampling tubes 22 sample simultaneously, the ratio of the total cross-sectional area to the total cross-sectional area of ​​the feed tube 1 reaches approximately 90%. The ratio of the sampling cross-sectional area to the cross-sectional area of ​​the feed tube 1 is significantly increased, resulting in greater sample representativeness and higher reliability (accuracy). The thousand-particle weight sampling method provides the best representativeness and higher thousand-particle weight accuracy.

[0060] The end of the guide tube 21 away from the feed tube 1 is connected to the first drive mechanism 23, and the movable end of the first drive mechanism 23 is connected to the sampling tube 22. The sampling tube 22 in the guide tube 21 moves back and forth automatically to achieve automatic sampling.

[0061] A sampling gate 35 for controlling the opening and closing of the second hole 12 is provided on the outer side of the side wall of the feed pipe 1 where the second hole 12 is located;

[0062] The outer side of the side wall of the feeding pipe 1 is also connected to a second drive mechanism 3 for driving the sampling gate 35 to flip and realize the opening and closing of the second hole 12. The second drive mechanism 3 is set on the third side wall 16.

[0063] The sampling gate 35 is connected to the rotating shaft 33, which is sleeved on the fixed block 34. The fixed block 34 is connected to the outer side of the side wall of the feeding pipe 1. One end of the rotating shaft 33 is connected to the first connecting rod 32. The first connecting rod 32 and the first connecting head 31 are hinged. The first connecting head 31 is connected to the movable end of the second drive mechanism 3. The second drive mechanism 3 drives the first connecting head 31 to move back and forth. The first connecting head 31 drives one end (e.g., the bottom end) of the first connecting rod 32 to move back and forth. The other end of the first connecting rod 32 drives the rotating shaft 33 to rotate. The rotating shaft 33 drives the sampling gate 35 to flip, thereby realizing the opening and closing control of the sampling gate 35 on the second hole 12. When the sampling gate 35 flips and leaves the second hole 12, the second hole 12 is in an open state, which allows the sampling tube 22 to pass through the second hole 12 and be placed above the collection hopper 4. The material in the sampling tube 22 automatically flows out and falls into the collection hopper 4. When the sampling gate 35 flips and sticks to the second hole 12, the second hole 12 is in a closed state, which prevents the material in the feeding pipe 1 from leaking out of the feeding pipe 1.

[0064] Both the first drive mechanism 23 and the second drive mechanism 3 are cylinders, but are not limited to cylinders.

[0065] The multi-section active sampler includes a collection hopper 4, which corresponds to the second hole 12 and is used to collect the material falling from the sampling tube 22 that passes through the second hole 12.

[0066] The multi-section active sampler includes a dust cover 5, which covers the openings of the second hole 12, the sampling door 35, and the collection hopper 4. A rotating shaft 33 passes through the dust cover 5 and connects to a first connecting rod 32. The dust cover 5 prevents impurities, dust, and fine particles in the material from spreading into the air. For example, one dust cover 5 covers a corresponding second hole 12, a corresponding sampling door 35, and a corresponding collection hopper 4, and the corresponding rotating shaft 33 passes through the corresponding dust cover 5 and connects to the corresponding first connecting rod 32. Each collection hopper 4 is connected to the collection hopper of a counting machine, facilitating the entry of the sample into the counting machine for subsequent counting operations.

[0067] All sampling tubes, whether three or more, fall under the purpose of this patent to increase the sampling area. Any modifications related to the principles of this patent will be considered infringements.

[0068] See Figures 6 to 10Specific embodiment 2 provides a multi-section active sampler. The difference between embodiment 2 and embodiment 1 is that the active sampler includes a feed pipe 1 and several sets of active sampling mechanisms 2. The area of ​​the feed pipe 1 used for sampling by the active sampling mechanisms 2 is a sampling section 13. The feed pipe 1 of the sampling section 13 has a square cross-section. A first hole 11 and a second hole 12 are respectively located on opposite sidewalls of the feed pipe 1 of the sampling section 13. For example, the first hole 11 is located on the first sidewall 14, and the second hole 12 is located on the second sidewall 15. The several sets of active sampling mechanisms 2 are arranged in parallel. For example, in embodiment 1, there are three sets of active sampling mechanisms 2. This square sampling section 13 design makes the feed pipe 1 virtually jam-free, with fast feeding speed. Compared to the existing circular sampling section, the square sampling section 13 in embodiment 1 covers a larger sampling range, with very small sampling dead angles, further expanding the sampling cross-sectional area. The larger the sampling surface, the greater the sample universality and the higher the reliability (accuracy).

[0069] In this embodiment 1, the inner diameter of the sampler tube is φ5.4cm, and the cross-section of the sampling section 13 of the feed tube 1 is square with an area of ​​29.6cm*29.6cm=876.16cm². The sum of the cross-sectional areas of the three sampler tubes is 5.4cm*29.6cm*3=479.52cm². The ratio of the sum of the cross-sectional areas of the three sampling tubes 22 to the cross-sectional area of ​​the sampling section 13 of the feed tube 1 is 479.52 / 876.16≈54.73%. Compared with the active sampler with a single sampling tube 22 in the prior art (CN203443801U), the ratio of the sampling cross-sectional area to the cross-sectional area of ​​the feed tube 1 is greatly improved, the sample universality is greater, and the reliability (accuracy) is higher.

[0070] In this embodiment 2, one collecting hopper 4 can be used to correspond to three second holes 12, and a dust cover 5 can be used to cover the three second holes 12, three sampling doors 35, and the opening of the collecting hopper 4. The rotating shaft 33 passes through the dust cover 5 and is connected to the first connecting rod 32. The dust cover 5 prevents impurities, dust, and fine particles in the material from spreading into the air.

[0071] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A multi-section active sampler, characterized in that: The multi-section active sampler includes a feed pipe (1) and several sets of active sampling mechanisms (2). Several sets of first holes (11) and second holes (12) are opened on the side wall of the feed pipe (1). Each active sampling mechanism (2) includes a guide tube (21) and a sampling tube (22) for sampling the material in the feed tube (1). The guide tube (21) is connected to the feed tube (1) and corresponds to the first hole (11). The sampling tube (22) is sleeved in the guide tube (21) and moves and corresponds to a first hole (11) and a second hole (12) through which the sampling tube (22) passes.

2. The multi-section active sampler according to claim 1, characterized in that: The sampling tubes (22) of several groups of active sampling mechanisms (2) are located at different heights on the feed pipe (1); And / or several sampling tubes (22) of several groups of active sampling mechanisms (2) have different tilt angles.

3. The multi-section active sampler according to claim 2, characterized in that: The multi-section active sampler includes three sets of active sampling mechanisms (2) and three sets of first holes (11) and second holes (12). The center line connecting the first hole (11) and the second hole (12) of each set is a projection on the horizontal plane. The three projections divide the projection of the feed pipe (1) on the horizontal plane into six parts.

4. The multi-section active sampler according to claim 3, characterized in that: In each group of first hole (11) and second hole (12), the height of the first hole (11) is higher than the height of the second hole (12); The sampling tube (22) is tilted at an angle of 45° to 60°.

5. The multi-section active sampler according to claim 1, characterized in that: The feed pipe (1) is used for sampling in the area of ​​the active sampling mechanism (2), which is the sampling section (13). The feed pipe (1) of the sampling section (13) has a square cross-section. The first hole (11) and the second hole (12) are respectively set on the opposite side wall of the feed pipe (1) of the sampling section (13).

6. The multi-section active sampler according to claim 5, characterized in that: Several groups of active sampling mechanisms (2) are set up in parallel.

7. A multi-section active sampler according to any one of claims 1 to 6, characterized in that: The guide tube (21) is connected to the first drive mechanism (23) at one end away from the feed tube (1), and the movable end of the first drive mechanism (23) is connected to the sampling tube (22).

8. The multi-section active sampler according to claim 7, characterized in that: The outer side of the side wall of the feed pipe (1) where the second hole (12) is located is provided with a sampling gate (35) for controlling the opening and closing of the second hole (12). The outer side of the side wall of the feed pipe (1) is also connected to a second drive mechanism (3) for driving the sampling gate (35) to flip and realize the opening and closing of the second hole (12).

9. The multi-section active sampler according to claim 8, characterized in that: The sampling gate (35) is connected to the rotating shaft (33), the rotating shaft (33) is sleeved on the fixed block (34), and the fixed block (34) is connected to the outer side of the side wall of the feeding pipe (1); one end of the rotating shaft (33) is connected to the first connecting rod (32), the first connecting rod (32) and the first connecting head (31) are hinged, and the first connecting head (31) is connected to the movable end of the second drive mechanism (3); Both the first drive mechanism (23) and the second drive mechanism (3) are cylinders.

10. The multi-section active sampler according to claim 9, characterized in that: The multi-section active sampler includes a collection hopper (4), which corresponds to the second hole (12); The and / or multi-section active sampler includes a dust cover (5) that covers the openings of the second hole (12), the sampling door (35) and the collection hopper (4), and a rotating shaft (33) that passes through the dust cover (5) and is connected to the first connecting rod (32).

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