Grain sampling rod

Abstract

The utility model discloses a grain sampling rod which comprises an outer rod body, a sampling head fixedly connected to the bottom end of the outer rod body and a sampling power connecting body fixedly arranged at the top end of the outer wall of the outer rod body, a top cover is fixedly connected to the top end of the outer rod body, and a positioning driving motor is fixedly installed in the center of the top face of the top cover. A sample separation assembly is coaxially and rotationally arranged in the outer rod body; the sample separating assembly comprises a plurality of sample separating cylinders, every two adjacent sample separating cylinders are fixedly connected through a connecting piece, the top end of the sample separating cylinder at the uppermost end is fixedly connected with an upper rotating shaft, the upper rotating shaft is in transmission connection with the output shaft end of a positioning driving motor, and the bottom end of the sample separating cylinder at the lowermost end is fixedly connected with a lower rotating shaft; an inner material opening is formed in the side wall of each sample separating barrel, and an outer material opening is formed in the outer wall of the outer rod body. Layered asynchronous sampling of grains is realized through the plurality of sample separating cylinders, samples are respectively stored, and each layer is asynchronously discharged, so that layered sampling of the grains is facilitated, and the overall condition of the grains is comprehensively detected.

Description

Technical Field

[0001] This utility model relates to the technical field of sampling machine accessories, specifically a grain sampling rod. Background Technology

[0002] A sampler is a piece of equipment used in the grain industry. It uses a sampling rod to collect grain samples from a grain pile, facilitating subsequent testing of the samples' physicochemical properties. Common types of samplers include cantilever rotating structures, gantry structures, and guide rail structures. Due to the limitations of the vehicle's structure, sampling is mostly performed vertically.

[0003] In existing grain sampling rod structures, multi-point sampling is typically achieved by using two hollow tubes, one inner and one outer. Several openings are made along the length of the outer tube's side wall, and multiple sample collection chambers are set in the inner tube. Each collection chamber has a feed inlet. The feed inlet and the openings are simultaneously connected or staggered by the relative rotation between the inner and outer tubes, enabling the simultaneous collection of multi-layer grain samples. Examples include a sampling rod disclosed in Chinese utility model patent (publication number CN212903997U), a fixed-point stratified sampling device for grain inspection in a grain reserve (publication number CN 217304450U), and a fixed-point sampling device for grain inspection (publication number CN 219161692U).

[0004] While the above technical solution can achieve synchronous sampling at different sampling locations, it has some shortcomings: First, since sampling is performed at all locations simultaneously and all sampling locations are on the same vertical line, the grain in the upper and lower layers may flow downwards during the process of entering the inner tube, resulting in unreliable samples at the sampling points; second, the collection and discharge of samples from each layer are carried out synchronously, requiring the setting of independent channels for different discharge ports to avoid mixing of samples from different layers, making it impossible to achieve asynchronous discharge of each sample separately, which brings inconvenience to subsequent collection and testing. Utility Model Content

[0005] This utility model proposes a grain sampling rod that uses multiple sampling cylinders to achieve asynchronous stratified sampling of grain, separate sample storage, and asynchronous discharge of each layer, facilitating stratified sampling of grain for comprehensive detection of the overall condition of the grain.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A grain sampling rod includes an outer rod body, a sampling head fixedly connected to the bottom end of the outer rod body, and a sampling power connector fixedly disposed on the top end of the outer wall of the outer rod body. A top cover is fixedly connected to the top end of the outer rod body, and a positioning drive motor is fixedly installed at the center of the top surface of the top cover. A sample separation component is coaxially rotatably disposed inside the outer rod body.

[0008] The sampling assembly includes several sampling cylinders, with adjacent sampling cylinders fixedly connected by connectors. The top of the uppermost sampling cylinder is fixedly connected to an upper rotating shaft that is rotatably installed in the bottom surface of the top cover. The upper rotating shaft is connected to the output shaft of the positioning drive motor. The bottom of the lowermost sampling cylinder is fixedly connected to a lower rotating shaft that is installed in the top surface of the sampling head.

[0009] Each sample tube has an inner material port on its side wall, and the outer wall of the outer rod has the same number of outer material ports as the sample tubes. When the positioning drive motor drives the sample assembly to rotate step by step, at most one inner material port and one outer material port will coincide in position.

[0010] Furthermore, the external feed ports are distributed in straight lines at equal intervals along the axial direction of the outer rod, and in circles with equal included angles along the circumferential direction of the outer rod.

[0011] Furthermore, the lowest point of the inner material outlet is located above the lowest point of the corresponding outer material outlet.

[0012] Furthermore, the bottom surface of the sample distribution cylinder is an inclined slope, and the lowest end of the bottom surface is connected to the inner material inlet.

[0013] Furthermore, the center of the top surface of the sampling head and the center of the bottom surface of the top cover are provided with bearing mounting grooves, and bearings are respectively embedded in the bearing mounting grooves. The shaft ends of the upper rotating shaft and the lower rotating shaft are respectively sleeved in the bearings on the corresponding sides.

[0014] Furthermore, the top edge of the sampling head is provided with a connecting plate, the outer diameter of the connecting plate matches the outer diameter of the outer rod, the top of the connecting plate is provided with an internal thread section, and the bottom of the outer rod is provided with an external thread section, the external thread section and the internal thread section are threadedly engaged.

[0015] Furthermore, the top of the outer rod is provided with a protective cover located outside the positioning drive motor.

[0016] Furthermore, the connector is a hollow cylindrical structure, with connecting flanges integrally provided at its top and bottom ends.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention features multiple synchronously rotating sample tubes coaxially arranged inside the outer rod. Driven by a positioning motor, the inner inlets of each sample tube are sequentially aligned with the outer inlets of the outer rod. When aligned, the grain can enter the sample tube for storage. After the stepping motor rotates, the inner inlets are located on the inner wall of the outer rod, preventing the grain from being exposed, thus achieving stratified sampling of the grain. Similarly, by sequentially aligning the inner inlets of each sample tube with the outer inlets of the outer rod, the samples stored in each sample tube can be discharged sequentially, facilitating stratified sampling of the grain for comprehensive testing of its overall condition. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0020] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the sampling head;

[0023] Figure 5 This is a three-dimensional structural diagram of the outer rod.

[0024] Figure 6 This is a three-dimensional structural diagram of the sample distribution tube;

[0025] Figure 7 This is a three-dimensional structural diagram of the sample-dividing component;

[0026] Figure 8 This is a schematic diagram showing the relative positions of the inner and outer material inlets.

[0027] In the diagram: 1. Outer rod body; 101. Outer material inlet; 2. Sample distribution cylinder; 201. Inner material inlet; 3. Top cover; 4. Positioning drive motor; 5. Sampling power connection body; 6. Sampling head; 7. Connector; 8. Upper rotating shaft; 9. Lower rotating shaft; 10. Bearing; 11. Protective cover. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] This grain sampling rod is used to insert into the grain to a certain depth. It needs to be used in conjunction with existing grain sampling machines and their control systems, all of which are existing technologies and will not be described in detail here. The following will use six sampling points from top to bottom as an example to explain in detail the specific structure and working principle of this grain sampling rod.

[0032] Please see Figures 1 to 8 A grain sampling rod includes an outer rod body 1, a sampling head 6 fixedly connected to the bottom end of the outer rod body 1, and a sampling power connection body 5 fixedly set on the top end of the outer wall of the outer rod body 1. A top cover 3 is fixedly connected to the top end of the outer rod body 1, and a positioning drive motor 4 is fixedly installed at the center of the top surface of the top cover 3. A sample separation component is coaxially rotatably arranged inside the outer rod body 1.

[0033] Specifically, the outer rod 1 is a hollow round rod, and its specific length can be determined according to the specific depth of sampling. The bottom of the sampling head 6 is inverted conical in shape, which facilitates its smooth insertion into the depth of the grain for deep, targeted sampling. A connecting plate is provided on the top edge of the sampling head 6. The outer diameter of the connecting plate matches the outer diameter of the outer rod 1. The top of the connecting plate has an internal thread section, and the bottom of the outer rod 1 has an external thread section. The external thread section and the internal thread section are threaded together. In this way, the sampling head 6 can be detachably and fixedly connected to the bottom of the outer rod 1, and the outer surface forms a continuous smooth curved surface.

[0034] The sampling assembly includes six sampling cylinders 2. Adjacent sampling cylinders 2 are fixedly connected by connectors 7. The top of the uppermost sampling cylinder 2 is fixedly connected to an upper rotating shaft 8 that is rotatably installed in the bottom surface of the top cover 3. The upper rotating shaft 8 is connected to the output shaft of the positioning drive motor 4. The bottom of the lowermost sampling cylinder 2 is fixedly connected to a lower rotating shaft 9 that is installed in the top surface of the sampling head 6.

[0035] Specifically, the sampling cylinder 2 is a cylindrical shell structure, with its outer diameter matching or slightly smaller than the inner diameter of the outer rod 1. This allows the sampling cylinder 2 to rotate smoothly within the outer rod 1, preventing granular grains from entering the gap between the outer wall of the sampling cylinder 2 and the inner wall of the outer rod 1. The connecting piece 7 is a hollow cylindrical structure with integral connecting flanges at its top and bottom. The top connecting flange is fixedly connected to the bottom surface of the upper sampling cylinder 2 by screws, and the bottom connecting flange is fixedly connected to the top surface of the lower sampling cylinder 2 by screws. The bottom end of the upper rotating shaft 8 is integrally connected with a connecting flange and is fixedly connected to the top surface of the uppermost sampling cylinder 2 by screws. The top end of the lower rotating shaft 9 is integrally connected with a connecting flange and is fixedly connected to the bottom surface of the lowermost sampling cylinder 2 by screws. Thus, the upper rotating shaft 8, the lower rotating shaft 9, the various sampling cylinders 2, and the various connecting pieces 7 are fixedly connected to form an integral cylindrical structure.

[0036] The top center of the sampling head 6 and the bottom center of the top cover 3 are both provided with bearing mounting grooves, and bearings 10 are respectively embedded in the bearing mounting grooves. The shaft ends of the upper rotating shaft 8 and the lower rotating shaft 9 are respectively sleeved in the bearings 10 on the corresponding sides. In this way, the sampling assembly can be coaxially arranged in the outer rod body 1, and the rotation of the sampling assembly in the outer rod body 1 can be smoother. The positioning drive motor 4 is a servo motor, which facilitates the adjustment of the rotation speed of the sampling assembly and the precise control of the step angle. In this embodiment, there are 6 sampling cylinders 2, so the corresponding step angle is 60°. Preferably, the top of the outer rod body 1 is provided with a protective cover 11 located outside the positioning drive motor 4 for the protection of the positioning drive motor 4 during use.

[0037] Each sample tube 2 has an inner material port 201 on its side wall, and the outer wall of the outer rod 1 has the same number of outer material ports 101 as the sample tube 2. When the positioning drive motor 4 drives the sample distribution assembly to rotate step by step, at most one inner material port 201 will coincide with the position of the outer material port 101. Specifically, the outer material ports 101 are distributed in a straight line at equal intervals along the axial direction of the outer rod 1 (the straight line distance between the equal points of two adjacent outer material ports 101 is the layer spacing of each sampling point), and are distributed in a circular shape with equal included angles along the circumferential direction of the outer rod 1 (the included angle of the central angle formed by the projection of two adjacent outer material ports 101 onto the horizontal plane corresponds to the stepping angle of the sample distribution assembly).

[0038] Preferably, the lowest point of the inner material inlet 201 is located above the lowest point of its corresponding outer material inlet 101, allowing the sample stored in the sample separator 2 to flow out smoothly through both the inner material inlet 201 and the outer material inlet 101. More preferably, the inner bottom surface of the sample separator 2 is a sloping surface, with the lowest point of the bottom surface connecting to the inner material inlet 201, making it easier and more complete for the sample to be discharged, avoiding any residue that could affect the subsequent sampling process.

[0039] The specific usage process of this grain sampling rod is as follows:

[0040] Initial stage: System initialization, positioning drive motor 4 drives the sample distribution component to reset. At this time, all the inner material ports 201 do not coincide with any of the outer material ports 101, but are all located to the side of the outer material ports 101 (such as the projection of the inner material port 201 in the horizontal plane is located in the middle of the projection of two adjacent outer material ports 101 in the horizontal plane). Each inner material port 201 is covered by the inner wall of the outer rod 1, and each outer material port 101 is covered by the outer wall of the sample distribution cylinder 2.

[0041] Insertion stage: The sampler drives the grain sampling rod to be vertically inserted into the grain to be sampled to a preset depth. During this process, since both the outer material port 101 and the inner material port 201 are blocked, the grain from the outside will not enter the sampling rod.

[0042] Sampling stage: The positioning drive motor 4 drives the sample distribution component to rotate a certain angle (such as 30°) and then pauses, so that the position of the uppermost inner material port 201 coincides with the position of the uppermost outer material port 101. Then the grain at the uppermost sampling point enters the uppermost sample distribution cylinder 2 through the outer material port 101 and the inner material port 201. The positioning drive motor 4 continues to drive the sampling assembly to rotate by one step angle (60° in this embodiment). Then, the inner material port 201 of the uppermost sampling cylinder 2 separates from the outer material port 101 of the uppermost sampling cylinder and is covered again by the inner wall of the corresponding outer rod body 1. The sample collected at the uppermost layer is temporarily stored in the uppermost sampling cylinder 2. At this time, the inner material port 201 of the second layer reaches the position of the outer material port 101 of the second layer, and the sampling of the second layer is completed by the same process described above. The above process is repeated until the grain sample of the bottom layer is collected in the bottommost sampling cylinder 2. Then, the positioning drive motor 4 continues to drive the sampling assembly to rotate by half a step angle, so that each outer material port 101 and inner material port 201 is in a blocked state again.

[0043] Extraction stage: After the sample collection is completed by the sampler, the grain sampling rod is vertically extracted from the detection position. During this process, since both the outer material port 101 and the inner material port 201 are blocked, the grain inside will not flow out from the sampling rod.

[0044] Discharge stage: Position the sampling rod directly above the sample collection vessel; the positioning drive motor 4 continues to drive the sampling assembly to rotate half a step angle. At this time, the uppermost inner material port 201 coincides with the uppermost outer material port 101 again, and the grain sample stored in the uppermost sampling cylinder 2 automatically flows out and falls into the sample collection vessel; the sampling rod is positioned in the next sample collection vessel, and the positioning drive motor 4 continues to drive the sampling assembly to rotate one step angle, so that the inner material port 201 of the second layer coincides with the outer material port 201 of the second layer again. Then, the grain sample stored in the second layer sampling cylinder 2 automatically flows out and falls into the sample collection vessel; repeat the same process to complete the discharge and collection of all grain samples collected in the sampling cylinder 2.

[0045] This grain sampler is used for stratified sampling. Since the sampling process is carried out layer by layer from top to bottom, and the sampling positions of each layer are projected at a certain distance on the horizontal plane, the grain at the upper sampling position will not interfere with the grain at the lower sampling position, thus ensuring the reliability of the sampling.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A grain sampling rod, comprising an outer rod body (1), a sampling head (6) fixedly connected to the bottom end of the outer rod body (1), and a sampling power connecting body (5) fixedly arranged at the top end of the outer wall of the outer rod body (1), characterized in that: The top end of the outer rod body (1) is fixedly connected with a top cover (3), the top surface center of the top cover (3) is fixedly installed with a positioning driving motor (4), and the inside of the outer rod body (1) is coaxially and rotationally provided with a sample separating assembly. The sample separating assembly comprises a plurality of sample separating cylinders (2), adjacent two sample separating cylinders (2) are fixedly connected through a connecting piece (7), the top end of the uppermost sample separating cylinder (2) is fixedly connected with an upper rotating shaft (8) which is rotationally installed in the bottom surface of the top cover (3), the upper rotating shaft (8) is in transmission connection with the output shaft end of the positioning driving motor (4), and the bottom end of the lowermost sample separating cylinder (2) is fixedly connected with a lower rotating shaft (9) which is installed in the top surface of the sample head (6). An inner material port (201) is formed in the side wall of each sample separating cylinder (2), and the outer wall of the outer rod body (1) is provided with outer material ports (101) in the same number as the sample separating cylinders (2), when the positioning driving motor (4) drives the sample separating assembly to stepwise rotate, at most one inner material port (201) is in position coincidence with one outer material port (101).

2. A grain probe rod according to claim 1, characterized in that: The outer material ports (101) are equidistantly and linearly distributed along the axial direction of the outer rod body (1) and are equi-angle circularly distributed along the circumferential direction of the outer rod body (1).

3. A grain probe rod according to claim 1 or 2, characterised in that: The lowest end of the inner material port (201) is located above the lowest end of the corresponding outer material port (101).

4. A grain probe rod according to claim 3, characterised in that: The inner bottom surface of the sample separating cylinder (2) is an inclined slope, and the lowest end of the bottom surface is in connection with the inner material port (201).

5. The grain probe rod of claim 1, wherein: The top surface center of the sample head (6) and the bottom surface center of the top cover (3) are provided with bearing embedding grooves, and bearings (10) are embedded in the bearing embedding grooves, respectively, and the shaft ends of the upper rotating shaft (8) and the lower rotating shaft (9) are respectively sleeved in the bearings (10) on the corresponding sides.

6. The grain probe rod of claim 1 or 5, wherein: The top surface edge of the sample head (6) is provided with a connecting fence, the outer diameter of the connecting fence matches the outer diameter of the outer rod body (1), the top end of the connecting fence is provided with an inner thread section, the bottom end of the outer rod body (1) is provided with an outer thread section, and the outer thread section is in threaded connection with the inner thread section.

7. The grain probe rod of claim 1 or 5, wherein: The top end of the outer rod body (1) is provided with a protective cover (11) located outside the positioning driving motor (4).

8. The grain probe rod of claim 1, wherein: The connecting piece (7) is in a hollow cylindrical structure, and the top end and the bottom end of the connecting piece (7) are integrally provided with connecting flanges, respectively.

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