Deep grain sampler

Abstract

The utility model provides a deep grain sampler, and belongs to the field of grain detection. The deep grain sampler comprises a sectional type hollow cylindrical main body, a rotatable inner pipe, a multi-layer sealing assembly, a sampling pipe, a sampling head and a driving device, the cylindrical main body is composed of three sections of detachable connecting pipes, a sampling port is formed in the lower section of the main body, the inner pipe is vertically arranged in the main body and can rotate along the axis, an opening corresponding to the sampling port is formed in the inner pipe, and when the inner pipe rotates, the opening is aligned with the sampling port to form a channel for grains to enter the inner pipe. The multi-layer sealing assembly is arranged between the inner pipe and the main body, and the sealing performance is ensured. The sampling pipe is located below the inner pipe and connected with the inner pipe, a channel is kept unblocked, and the sampling head is installed at the bottom end of the sampling pipe in a detachable connection mode. The driving device is arranged at the outer top end of the sealing cover, connected with the inner pipe and used for driving the inner pipe to rotate. The device has the advantages of being high in sampling precision, convenient to operate, good in sealing performance and capable of effectively preventing grain samples of different depths from being mixed.

Description

Technical Field

[0001] The present application relates to the technical field of grain detection, and in particular to a deep grain sampler. Background Art

[0002] Grain quality testing and monitoring plays a crucial role in agricultural production, storage, and transportation. To ensure the quality and safety of stored grain, deep samplers are widely used to obtain representative grain samples from large-capacity grain warehouses and grain transport vehicles. Deep sampling technology allows samples to be collected from different depths within the grain pile, analyzing the moisture content, impurity content, and quality grade, helping decision-makers make accurate judgments and formulate treatment plans. Existing deep grain samplers typically rely on manual or mechanical actuation to quickly collect grain samples.

[0003] Most existing deep grain samplers are composed of a hollow sampling tube, and the movement of the inner tube is controlled by an external drive device (such as a handle or a motor) to collect samples. This type of deep grain sampler is usually provided with an opening on the wall of the sampling tube, and the grain enters the tube through these openings. However, this type of device has exposed some problems in actual operation. The opening is uncontrollable during operation, resulting in grain from various depths freely entering the sampling tube through the sampling port when the sampler is inserted into the grain pile. The design of this opening causes grain from different depths to mix together, and the representativeness of the sampling results cannot be guaranteed. In particular, when it is necessary to conduct stratified sampling of grain at different depths, the existing sampler cannot effectively control the opening and closing of the sampling port, resulting in a significant reduction in the accuracy and reliability of the sampling. At the same time, since the opening cannot be closed at the appropriate time, the sealing of the sample is poor during operation, and grain samples may leak or be cross-contaminated in non-target areas.

[0004] A key issue with existing deep-seated grain samplers is the inability to flexibly control the opening and closing of the sampling port. This results in grain from different depths mixing during insertion, impacting the accuracy and representativeness of the sample. The sampling port's opening and closing cannot be adjusted promptly to meet operational needs, leading to the mixing of grain from different depths. Furthermore, insufficient sealing during sampling can easily lead to sample leakage or contamination. Therefore, a sampler with precise control over the opening and closing of the sampling port is urgently needed to improve sampling accuracy and purity. Utility Model Content

[0005] The present application provides a deep grain sampler, which aims to solve the problems of uncontrollable sampling ports and mixing of grains at different depths during the sampling process of existing deep grain samplers.

[0006] The present application provides a deep grain sampler, which comprises a segmented hollow cylindrical body, a rotatable inner tube, a multi-layer sealing assembly, a sampling tube, a sampling head and a driving device;

[0007] The cylindrical body is composed of three sections of mutually detachably connected connecting pipes. A sampling port is opened on the wall of the connecting pipe corresponding to the lower section of the cylindrical body, and a sealing cover is provided on the top of the cylindrical body.

[0008] The inner tube is vertically arranged inside the cylindrical body, extending along the axis of the cylindrical body and rotatable around the axis. The inner tube is provided with an opening corresponding to the sampling port. When the inner tube rotates, the opening is aligned with the sampling port to form a passage allowing food to pass through the sampling port and enter the inner tube;

[0009] The multi-layer sealing assembly is disposed between the inner tube and the cylindrical body to prevent the food sample from entering a non-target area outside the inner tube;

[0010] The sampling tube is coaxially arranged below the inner tube, the top end of the sampling tube is connected to and communicates with the bottom end of the inner tube, and the diameter of the sampling tube is smaller than that of the inner tube;

[0011] The sampling head is arranged at the bottom end of the sampling tube, and the sampling head is detachably connected to the sampling tube;

[0012] The driving device is arranged at the outer top end of the sealing cover, and is connected to the inner tube to drive the inner tube to rotate.

[0013] As an optional solution of the embodiment of the present application, the multi-layer sealing assembly adopts a sealing ring assembly that can maintain the sealing of the gap between the inner tube and the inner tube during rotation. The multi-layer sealing assembly includes a first sealing ring, a second sealing ring, and a third sealing ring provided on the outer surface of the inner tube;

[0014] The first sealing ring is arranged on the outer surface of the inner tube near the top and forms a tight fit with the inner wall of the cylindrical body;

[0015] The second sealing ring is arranged at the middle position of the outer surface of the inner tube and matches with the groove at the same height position of the inner wall of the cylindrical body;

[0016] The third sealing ring is arranged on the outer surface of the inner tube near the bottom end and forms a tight fit with the inner wall of the cylindrical body.

[0017] As an optional solution of the embodiment of the present application, it also includes a guiding device, which is arranged at the lower position of the inner tube. The guiding device includes a sliding guide rail or a rolling bearing structure, which is used to keep the inner tube stable when the inner tube rotates to prevent deviation and shaking.

[0018] As an optional solution of the embodiment of the present application, when the guide device adopts a sliding guide rail, the guide device includes a group of sliding blocks arranged on the outer wall of the inner tube, the number of the sliding blocks is at least two, and a circle of grooves is provided on the inner wall of the cylindrical body at the same height as the sliding blocks, and a slide rail is provided through the groove to slide with the sliding blocks;

[0019] When the guide device adopts a rolling bearing structure, the guide device includes a rolling bearing fixed on the outer wall of the inner tube, and the rolling bearing is fixedly connected to the inner wall of the cylindrical body.

[0020] As an optional scheme of an embodiment of the present application, the driving device is a handle driving device, and the driving device includes a handle, a mounting shell, a rotating rod and a gear set, the mounting shell is fixedly mounted on the outer top end of the sealing cover, the handle is arranged on the top end of the mounting shell, the rotating rod is rotatably connected to the top end of the mounting shell and one end of the rotating rod extends out of the top end of the mounting shell, the rotating rod extends out of the mounting shell and is connected to one end of the handle, the gear set is installed in the mounting shell, the other end of the rotating rod extends into the mounting shell and is connected to the gear set in the mounting shell, the handle is connected to the gear set in the mounting shell through the rotating rod, the rotating rod is connected to the inner tube through the connected gear set, the top middle part of the inner tube is vertically fixedly connected to a rotating shaft rotatably connected to the sealing cover, the inner tube is connected to the gear set through the rotating shaft, and the inner tube can rotate under the rotation of the handle to open or close the sampling port.

[0021] As an optional solution of the embodiment of the present application, the gear set is a single-stage reduction gear set or a multi-stage reduction gear set that can amplify the rotational torque of the handle.

[0022] As an optional solution of the embodiment of the present application, a limiting device is further included, which is used to limit the rotation angle of the inner tube so as to stop the rotation after the sampling port is aligned with the opening of the inner tube;

[0023] The limit device includes a limit rod and a stopper, the limit rod is fixedly connected to the top end of the inner tube and passes through the sealing cover, the sealing cover is provided with a slide groove for the movement of the limit rod, the slide groove is an arc groove, and when the inner tube rotates, the slide groove adapts to the movement path of the limit rod; the slide groove is configured: when the limit rod moves to one end of the slide groove, the opening of the inner tube is aligned with the sampling port, and when the limit rod moves to the other end of the slide groove, the inner tube completely closes the sampling port; elastically deformable stops are respectively provided on the groove wall of the slide groove near the two ends of the slide groove, and the stops can be deformed when squeezed by the limit rod to allow the stops to pass through, and the two stops and the two ends of the slide groove respectively have limiting spaces that can limit the limit rod.

[0024] As an optional solution of the embodiment of the present application, the first sealing ring, the second sealing ring and the third sealing ring are all polytetrafluoroethylene sealing rings.

[0025] As an optional solution of the embodiment of the present application, the cylindrical body, the inner tube, the sampling tube and the sampling head are all made of food-grade stainless steel.

[0026] As an optional solution of the embodiment of the present application, the three sections of the connecting tubes of the cylindrical body, the top end of the sampling tube and the bottom end of the inner tube, and the sampling head and the sampling tube are all connected in a threaded manner; the sampling head is a hollow structure, and the top end of the sampling head is connected to the bottom end of the inner tube.

[0027] Compared with the prior art, this application has the following beneficial effects:

[0028] 1. The present application provides a deep-layer grain sampler, which adopts a rotatable inner tube. The inner tube extends along the axis of the cylindrical body and can rotate around the axis. The inner tube is provided with an opening corresponding to the sampling port. When in use, the opening and closing of the sampling port can be precisely controlled by controlling the rotation of the inner tube. When the inner tube is rotated to a specific angle, the opening is aligned with the sampling port and opens, allowing grain to enter the inner tube; when the inner tube is rotated to the closed position, the sampling port is sealed to prevent further entry of grain. In this way, the operator can flexibly control the opening and closing of the inner tube and the sampling port according to sampling needs, avoiding unnecessary mixing of grains at different depths during the insertion process.

[0029] 2. This application also incorporates a multi-layered sealing assembly between the inner tube and the cylindrical body to prevent leakage of grain samples from the inner tube during sampling. This assembly ensures a tight seal during rotation, further preventing external contamination or cross-contamination of grain samples. The sealing assembly effectively ensures pure sample collection, enhancing sample representativeness and detection accuracy.

[0030] 3. The driving device of the present application is installed on the sealing cover and connected to the inner tube to drive the inner tube to rotate. Through the handle or electric driving device, the operator can easily control the rotation angle of the inner tube to achieve precise opening and closing of the sampling port. This design improves the flexibility of operation and enables the operator to open or close the sampling port at the appropriate time according to the sampling requirements, ensuring the controllability and accuracy of the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A three-dimensional schematic diagram of a deep grain sampler provided in one embodiment of the present application;

[0033] Figure 2 A schematic diagram of the internal structure of a deep grain sampler provided in one embodiment of the present application;

[0034] Figure 3 A schematic structural diagram of a driving device provided in one embodiment of the present application.

[0035] Description of reference numerals:

[0036] 10. Cylindrical body; 11. Sampling port; 101. Connecting tube; 20. Inner tube; 201. Opening; 30. Multi-layer sealing assembly; 301. First sealing ring; 302. Second sealing ring; 303. Third sealing ring; 40. Sampling head; 50. Sampling tube; 60. Limiting device; 601. Limiting rod; 602. Stopper; 70. Driving device; 71. Handle; 72. Mounting shell; 73. Rotating rod; 80. Guide device; 90. Sealing cover; 901. Slide groove. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the orientation or position relationship represented by terms such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only used to facilitate the description of this application and simplify the explanation, and does not imply that the device or element must have a specific orientation, structure or operation mode, and therefore should not be regarded as a limitation on this application.

[0039] The terms "first," "second," and so on are used solely to distinguish different technical features and do not indicate the relative importance of such features or a specific number of such features. Therefore, a feature described as "first" or "second" may refer to one or more of such features. In this application, unless otherwise specified, "plurality" generally refers to two or more.

[0040] In the description of this application, it should be noted that, unless expressly specified or otherwise limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integrated connections. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] See also Figure 1-Figure 3 ,in, Figure 1 A three-dimensional schematic diagram of a deep grain sampler provided in one embodiment of the present application; Figure 2 A schematic diagram of the internal structure of a deep grain sampler provided in one embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the driving device provided in one embodiment of the present application. Figure 1-Figure 3 As shown, the embodiment of the present application provides a deep grain sampler, comprising a segmented hollow cylindrical body 10, a rotatable inner tube 20, a multi-layer sealing assembly 30, a sampling tube 50, a sampling head 40 and a driving device 70. The detailed description is as follows:

[0042] The cylindrical body 10 is composed of three sections of mutually detachably connected connecting pipes 101. A sampling port 11 is opened on the wall of the connecting pipe 101 corresponding to the lower section of the cylindrical body 10. A sealing cover 90 is provided at the top of the cylindrical body 10.

[0043] The inner tube 20 is vertically arranged inside the cylindrical main body 10. The inner tube 20 extends along the axial direction of the cylindrical main body 10 and can rotate around the axis. An opening 201 corresponding to the sampling port 11 is provided on the inner tube 20. When the inner tube 20 rotates, the opening 201 can be aligned with the sampling port 11 to form a channel allowing food to pass through the sampling port 11 into the inner tube 20.

[0044] The multi-layer sealing assembly 30 is disposed between the inner tube 20 and the cylindrical body 10 to prevent the food sample from entering a non-target area outside the inner tube 20 .

[0045] The sampling tube 50 is coaxially arranged below the inner tube 20 . The top end of the sampling tube 50 is connected to and communicates with the bottom end of the inner tube 20 . The diameter of the sampling tube 50 is smaller than that of the inner tube 20 .

[0046] The sampling head 40 is disposed at the bottom end of the sampling tube 50 , and the sampling head 40 is detachably connected to the sampling tube 50 .

[0047] The driving device 70 is disposed at the outer top end of the sealing cover 90 . The driving device 70 is connected to the inner tube 20 and is used to drive the inner tube 20 to rotate.

[0048] The deep grain sampler provided in the embodiment of the present application adopts a rotatable inner tube 20. The inner tube 20 extends along the axis of the cylindrical main body 10 and can rotate around the axis. The inner tube 20 is provided with an opening 201 corresponding to the sampling port 11. When in use, the opening and closing of the sampling port 11 can be accurately controlled by controlling the rotation of the inner tube 20. When the inner tube 20 is rotated to a specific angle, the opening 201 is aligned with the sampling port 11 and opened, allowing grain to enter the inner tube 20; and when the inner tube 20 is rotated to the closed position, the sampling port 11 is sealed to prevent further entry of grain. In this way, the operator can flexibly control the opening and closing of the inner tube 20 and the sampling port 11 according to the sampling requirements, avoiding unnecessary mixing of grains at different depths during the insertion process.

[0049] At the same time, the present application also provides a multi-layer sealing assembly 30 between the inner tube 20 and the cylindrical body 10 to prevent the grain sample from leaking out of the inner tube 20 during the sampling process. This assembly ensures the sealing of the inner tube 20 during rotation, further avoiding external contamination or cross-contamination of the grain sample. Through the cooperation of the sealing assembly, it can effectively ensure the pure collection of the sample, improve the representativeness of the sample and the accuracy of the detection.

[0050] In addition, the driving device 70 of the present application is installed on the sealing cover 90 and is connected to the inner tube 20 to drive the inner tube 20 to rotate. Through the handle or electric driving device, the operator can easily control the rotation angle of the inner tube 20 to achieve precise opening and closing of the sampling port 11. This design improves the flexibility of operation, allowing the operator to open or close the sampling port 11 at the appropriate time according to the sampling requirements, thereby ensuring the controllability and accuracy of the sampling process.

[0051] In some embodiments, the multi-layer sealing assembly 30 uses a sealing ring assembly that can maintain the sealing of the gap between the inner tube 20 and the inner tube 20 during rotation. The multi-layer sealing assembly 30 includes a first sealing ring 301, a second sealing ring 302 and a third sealing ring 303 arranged on the outer surface of the inner tube 20.

[0052] Among them, the first sealing ring 301 is arranged on the outer surface of the inner tube 20 near the top, and forms a tight fit with the inner wall of the cylindrical body 10; the second sealing ring 302 is arranged in the middle position of the outer surface of the inner tube 20, and cooperates with the groove at the same height position of the inner wall of the cylindrical body 10; the third sealing ring 303 is arranged on the outer surface of the inner tube 20 near the bottom end, and forms a tight fit with the inner wall of the cylindrical body 10.

[0053] In this embodiment, the design of the multi-layer sealing assembly 30 is further refined. A first sealing ring 301, a second sealing ring 302, and a third sealing ring 303 are respectively provided at the top, middle, and bottom of the inner tube 20. The design innovation of the multi-layer sealing assembly 30 lies in the placement of the sealing rings at different locations on the inner tube 20, creating a multi-layered protection structure. This structure ensures the full sealing of the inner tube 20 during rotation, preventing leakage or cross-contamination of the grain sample. The multi-layered structure of the sealing rings makes the seal more reliable, improving the purity of the sample and the accuracy of the experimental results.

[0054] In some embodiments, the deep grain sampler of the present application further includes a guide device 80, which is arranged at the lower position of the inner tube 20. The guide device 80 includes a sliding guide rail or a rolling bearing structure, which is used to keep the inner tube 20 stable when the inner tube 20 rotates to prevent deviation and shaking.

[0055] The deep grain sampler of this embodiment incorporates a guide device 80, located below the inner tube 20, to maintain stability during rotation and prevent deviation and shaking. This device, which includes a sliding guide or rolling bearing structure, ensures stable operation of the inner tube 20 during rotation, preventing inaccurate sampling caused by deviation. The introduction of this guide device ensures that the inner tube 20 always maintains the correct posture during rotation, ensuring accurate sampling.

[0056] In some embodiments, when the guide device 80 utilizes a sliding guide rail, the guide device 80 includes a set of sliding blocks disposed on the outer wall of the inner tube 20, with at least two sliding blocks. A groove is formed on the inner wall of the cylindrical body 10 at the same height as the sliding blocks, and a sliding rail is disposed within the groove, slidably engaging with the sliding blocks. During use, the sliding blocks and the sliding rails cooperate to precisely control the stability of the inner tube 20.

[0057] When the guide device 80 adopts a rolling bearing structure, the guide device 80 includes a rolling bearing fixed on the outer wall of the inner tube 20, and the rolling bearing is fixedly connected to the inner wall of the cylindrical body 10. The use of the rolling bearing can further improve the rotation efficiency of the inner tube by reducing friction.

[0058] This embodiment further illustrates the guide device 80, with two different specific forms provided. When the guide device 80 utilizes a sliding rail, a design provides for the matching of the sliding block and the rail. When the guide device 80 utilizes a rolling bearing structure, a design provides for a fixed connection between the rolling bearing and the inner wall of the cylindrical body 10. This design allows the guide device 80 to be flexibly adapted to meet diverse application requirements, ensuring that the inner tube remains stable and avoids deviation during rotation.

[0059] The cam 73 is connected to the top of the cam 72 and the cam 74 is connected to the top of the cam 72, and the cam 74 is connected to the top of the cam 72.

[0060] The drive device 70 of the embodiment of the present application adopts a handle drive device, including a handle 71, a mounting shell 72, a rotating rod 73 and a gear set. The rotation of the handle 71 drives the inner tube 20 to rotate. The handle drive device cleverly introduces the gear set. Through the deceleration and amplification function of the gear set, the torque requirement during operation is reduced, so that the operation of the handle 71 can amplify the rotational torque through the gear set, thereby solving the problem of manual operation labor in the prior art. This design allows the operator to easily control the rotation of the inner tube 20 without motor control, improving the convenience and efficiency of operation. This meticulous design significantly improves the operating experience of the device and breaks through the limitations of the prior art.

[0061] In some embodiments, the gear set is a single-stage or multi-stage reduction gear set capable of amplifying the rotational torque of the handle 71 .

[0062] In this embodiment, the gear set adopts a single-stage reduction gear set or a multi-stage reduction gear set, which can further amplify the rotational torque of the handle. This design ensures ease of operation, allowing the operator to easily rotate the inner tube even in the face of significant resistance.

[0063] Existing samplers often use a simple handle drive, ignoring the resistance that may be encountered during operation. The embodiments of the present application cleverly amplify the rotational torque of the handle through a single-stage or multi-stage reduction gear set, solving the problem of laborious manual operation and enabling the operator to easily complete the operation even in the face of significant resistance.

[0064] In some embodiments, the deep grain sampler of the present application further includes a limiting device 60 for limiting the rotation angle of the inner tube 20 to stop the rotation after the sampling port 11 is aligned with the opening 201 of the inner tube 20 .

[0065] Specifically, the limiting device 60 includes a limiting rod 601 and a stopper 602. The limiting rod 601 is fixedly connected to the top end of the inner tube 20 and passes through the sealing cover 90. The sealing cover 90 is provided with a slide 901 for the limiting rod 601 to move. The slide 901 is an arc-shaped groove and when the inner tube 20 rotates, the slide 901 adapts to the movement path of the limiting rod 601; the slide 901 is configured such that when the limiting rod 601 moves to one end of the slide 901, the opening of the inner tube 20 is opened. 201 is aligned with the sampling port 11. When the limiting rod 601 moves to the other end of the chute 901, the inner tube 20 completely closes the sampling port 11. Elastically deformable blocks 602 are respectively provided on the groove wall of the chute 901 near the two ends of the chute 901. The blocks 602 can be deformed when squeezed by the limiting rod 601 to allow the blocks 602 to pass through. The two blocks 602 and the two ends of the chute 901 respectively have limiting spaces that can limit the limiting rod 601.

[0066] In an embodiment of the present application, a limiting device 60 is added to the deep grain sampler, which can be used to accurately control the rotation angle of the inner tube 20 to ensure that the sampling port 11 is accurately aligned with the opening of the inner tube 20. This design allows the inner tube 20 to move only within a set angle range during rotation through the combination of a limiting rod 601, a slide groove 901 and a stopper 602, avoiding exceeding the specified angle. This ensures the accuracy of the opening of the sampling port 11, so that the opening and closing of the sampling port 11 can be flexibly and accurately controlled according to usage requirements, thereby improving the accuracy and controllability of sampling. In addition, the design of the elastic stopper can ensure that the inner tube 20 can be automatically locked when it rotates to the set position, making the entire operation process more stable and reliable.

[0067] In some embodiments, the first sealing ring 301 , the second sealing ring 302 and the third sealing ring 303 are all made of polytetrafluoroethylene sealing rings.

[0068] In this embodiment, the first, second, and third sealing rings 301, 302, and 303 of the multi-layer sealing assembly 30 are all made of polytetrafluoroethylene (PTFE). This material significantly enhances the seal assembly's wear resistance, corrosion resistance, and high-temperature resistance. PTFE sealing rings have an extremely low coefficient of friction, ensuring smooth rotation of the inner tube and a more durable seal, ensuring a good seal even during extended use.

[0069] Compared to traditional rubber seals, PTFE is not only more adaptable to harsher operating environments, but also effectively reduces the degradation of sealing performance caused by friction. This design not only improves the reliability of the device, but also significantly extends its service life.

[0070] In some embodiments, the cylindrical body 10 , the inner tube 20 , the sampling tube 50 , and the sampling head 40 are all made of food-grade stainless steel.

[0071] Existing samplers are often made of ordinary metal or plastic materials. While these materials can meet basic functional requirements, they struggle to balance safety and durability. In this embodiment, the cylindrical body 10, inner tube 20, sampling tube 50, and sampling head 40 are all made of food-grade stainless steel. This design, using food-grade stainless steel as the primary material, ensures the device is highly safe, corrosion-resistant, and easy to clean when in contact with food samples. Compared to other materials, food-grade stainless steel not only avoids contamination caused by chemical reactions but also withstands long-term use in high-humidity, high-acidity, and high-alkalinity environments without corrosion, thereby ensuring sample purity.

[0072] In some embodiments, the three connecting tubes 101 of the cylindrical body 10, the top of the sampling tube 50 and the bottom of the inner tube 20, and the sampling head 40 and the sampling tube 50 are all connected in a threaded manner; the sampling head 40 is a hollow structure, and the top of the sampling head 40 is connected to the bottom of the inner tube 20.

[0073] In this embodiment, all major components are connected by threaded connections, including the three connecting tubes 101 of the cylindrical body 10, the connection between the sampling tube 50 and the inner tube 20, and the connection between the sampling head 40 and the sampling tube 50. This design facilitates disassembly and maintenance of the components, especially during routine cleaning and component replacement. Furthermore, the threaded connections ensure a tight fit between the components, preventing loosening during operation.

[0074] The use process of the deep grain sampler in the embodiment of the present application is as follows:

[0075] During use, the rotation of the inner tube 20 is first controlled by the driving device 70 to ensure that the sampling port 11 is in a closed state. The operator then inserts the sampler of the embodiment of the present application into the grain pile, and the insertion depth is operated according to actual needs. After the sampler is inserted into the grain pile, the rotation of the inner tube 20 is controlled by the driving device 70. The inner tube 20 is vertically arranged inside the cylindrical main body 10, extends along the axial direction of the cylindrical main body 10, and can rotate around the axis. Since an opening 201 corresponding to the sampling port 11 at the lower section of the main body is provided on the outer wall of the inner tube 20, when the operator rotates the handle, the inner tube 20 rotates and aligns the inner tube opening 201 with the sampling port 11. At this time, grain can enter the inner tube 20 through the sampling port 11, and the grain sample is collected through the sampling port 11.

[0076] During the sampling process, a multi-layer sealing assembly 30 ensures a tight seal, preventing leakage of grain samples or cross-contamination with other samples. Disposed between the inner tube 20 and the cylindrical body 10, the multi-layer sealing assembly 30 ensures a full seal during the rotation of the inner tube 20 by providing a first sealing ring 301, a second sealing ring 302, and a third sealing ring 303. This prevents grain from entering the sampler from non-target areas, ensuring sample purity and the accuracy of test results.

[0077] A sampling tube 50 is provided below the inner tube 20. The sampling tube 50 is connected to the inner tube 20. After the grain sample enters the inner tube 20 through the sampling port 11, it will further flow into the sampling tube 50. The diameter of the sampling tube 50 is smaller than the diameter of the inner tube 20, which helps to control the sampling volume. The bottom end of the sampling tube 50 is connected to the sampling head 40, and the sampling head 40 is connected to the sampling tube 50 in a detachable threaded manner. The sampling head 40 is used to collect the final grain sample, and different types of sampling heads 40 can be replaced according to demand to ensure optimal collection for different types of grain.

[0078] The drive unit 70 is located at the outer top of the sealing cover 90 and controls the rotation of the inner tube 20 via a handle or motorized device. The drive unit 70 amplifies the rotational torque of the handle 71 via a gear train, making the rotation of the inner tube 20 easier and more precise. The operator can precisely control the opening and closing of the sampling port 11 through the drive unit 70, ensuring that the grain sample is collected when needed, thereby preventing unnecessary mixing during the sampling process.

[0079] After sampling is complete, the operator rotates the handle 71 again, rotating the inner tube 20 to the closed position. This disengages the sampling port 11 from the inner tube opening 201, preventing further grain from entering the inner tube. The entire device can then be removed from the grain pile, and the operator can remove the sampling head 40 and retrieve the collected grain sample for testing.

[0080] In summary, the deep grain sampler provided in the embodiment of the present application effectively solves the problems of uncontrollable sampling ports and mixed grains at different depths in the prior art by precisely opening and closing the sampling port 11 through the rotation of the inner tube 20, preventing sample leakage through the multi-layer sealing assembly 30, and providing convenient operation through the drive device 70. This design enables accurate sample collection, ensuring sample purity and representativeness.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A deep grain sampler, characterized in that: The sampler comprises a segmented hollow cylindrical body (10), a rotatable inner tube (20), a multi-layer sealing assembly (30), a sampling tube (50), a sampling head (40) and a driving device (70); The cylindrical body (10) is composed of three sections of connecting pipes (101) that are detachably connected to each other. A sampling port (11) is provided on the wall of the connecting pipe (101) corresponding to the lower section of the cylindrical body (10). A sealing cover (90) is provided at the top end of the cylindrical body (10). The inner tube (20) is vertically arranged inside the cylindrical body (10), the inner tube (20) extends along the axis of the cylindrical body (10) and is rotatable around the axis, the inner tube (20) is provided with an opening (201) corresponding to the sampling port (11), and the inner tube (20) can align the opening (201) with the sampling port (11) when rotating to form a passage allowing food to pass through the sampling port (11) and enter the inner tube (20); The multi-layer sealing assembly (30) is disposed between the inner tube (20) and the cylindrical body (10) to prevent the food sample from entering a non-target area outside the inner tube (20); The sampling tube (50) is coaxially arranged below the inner tube (20), the top end of the sampling tube (50) is connected to and communicates with the bottom end of the inner tube (20), and the diameter of the sampling tube (50) is smaller than the diameter of the inner tube (20); The sampling head (40) is arranged at the bottom end of the sampling tube (50), and the sampling head (40) is connected to the sampling tube (50) in a detachable manner; The driving device (70) is arranged at the outer top end of the sealing cover (90), and the driving device (70) is connected to the inner tube (20) and is used to drive the inner tube (20) to rotate.

2. The deep grain sampler according to claim 1, characterized in that: The multi-layer sealing assembly (30) adopts a sealing ring assembly capable of maintaining the sealing performance of the gap between the inner tube (20) and the inner tube (20) during rotation. The multi-layer sealing assembly (30) comprises a first sealing ring (301), a second sealing ring (302) and a third sealing ring (303) arranged on the outer surface of the inner tube (20); The first sealing ring (301) is arranged on the outer surface of the inner tube (20) near the top and forms a tight fit with the inner wall of the cylindrical body (10); The second sealing ring (302) is arranged at a middle position of the outer surface of the inner tube (20) and matches with a groove at the same height position of the inner wall of the cylindrical body (10); The third sealing ring (303) is arranged on the outer surface of the inner tube (20) near the bottom end and forms a tight fit with the inner wall of the cylindrical body (10).

3. The deep grain sampler according to claim 1 or 2, characterized in that: The invention also includes a guide device (80), which is arranged at a lower position of the inner tube (20). The guide device (80) includes a sliding guide rail or a rolling bearing structure, which is used to keep the inner tube (20) stable when the inner tube (20) rotates to prevent deviation and shaking.

4. The deep grain sampler according to claim 3, characterized in that: When the guide device (80) adopts a sliding guide rail, the guide device (80) includes a group of sliding blocks arranged on the outer wall of the inner tube (20), the number of the sliding blocks is at least 2, and a circle of grooves is provided on the inner wall of the cylindrical body (10) at the same height as the sliding blocks, and a slide rail is provided through the groove to slide with the sliding blocks; When the guide device (80) adopts a rolling bearing structure, the guide device (80) includes a rolling bearing fixed on the outer wall of the inner tube (20), and the rolling bearing is fixedly connected to the inner wall of the cylindrical body (10).

5. The deep grain sampler according to claim 1, characterized in that: The driving device (70) is a handle driving device, and the driving device (70) includes a handle (71), a mounting shell (72), a rotating rod (73) and a gear set. The mounting shell (72) is fixedly mounted on the outer top end of the sealing cover (90), and the handle (71) is arranged on the top end of the mounting shell (72). The rotating rod (73) is rotatably connected to the top end of the mounting shell (72) and one end of the rotating rod (73) extends out of the top end of the mounting shell (72). One end of the rotating rod (73) extending out of the mounting shell (72) is connected to one end of the handle (71). The gear set is installed in the mounting shell (72). The other end of (73) extends into the mounting shell (72) and is connected to the gear set in the mounting shell (72). The handle (71) is connected to the gear set in the mounting shell (72) through the rotating rod (73). The rotating rod (73) is connected to the inner tube (20) through the connected gear set. A rotating shaft that is rotatably connected to the sealing cover (90) is fixedly connected vertically upward at the middle of the top end of the inner tube (20). The inner tube (20) is connected to the gear set through the rotating shaft. The inner tube (20) can rotate under the rotation of the handle (71) to open or close the sampling port (11).

6. The deep grain sampler according to claim 5, characterized in that: The gear set is a single-stage reduction gear set or a multi-stage reduction gear set capable of amplifying the rotational torque of the handle (71).

7. The deep grain sampler according to claim 1, 5 or 6, characterized in that: It also includes a limiting device (60) for limiting the rotation angle of the inner tube (20) so as to stop the rotation after the sampling port (11) is aligned with the opening (201) of the inner tube (20); The limiting device (60) includes a limiting rod (601) and a stopper (602), wherein the limiting rod (601) is fixedly connected to the top end of the inner tube (20) and passes through the sealing cover (90), and the sealing cover (90) is provided with a sliding groove (901) for the limiting rod (601) to move, and the sliding groove (901) is an arc-shaped groove and when the inner tube (20) rotates, the sliding groove (901) is adapted to the moving path of the limiting rod (601); the sliding groove (901) is configured such that when the limiting rod (601) moves to one end of the sliding groove (901), the inner tube (20) The opening (201) is aligned with the sampling port (11), and when the limiting rod (601) moves to the other end of the chute (901), the inner tube (20) completely closes the sampling port (11); elastically deformable blocks (602) are respectively provided on the groove wall of the chute (901) near the two ends of the chute (901), and the blocks (602) can be deformed when squeezed by the limiting rod (601) to allow the blocks (602) to pass through, and the two blocks (602) and the two ends of the chute (901) respectively have limiting spaces that can limit the limiting rod (601).

8. The deep grain sampler according to claim 2, characterized in that: The first sealing ring (301), the second sealing ring (302) and the third sealing ring (303) are all polytetrafluoroethylene sealing rings.

9. The deep grain sampler according to claim 1, characterized in that: The cylindrical body (10), the inner tube (20), the sampling tube (50) and the sampling head (40) are all made of food-grade stainless steel.

10. The deep grain sampler according to claim 1 or 9, characterized in that: The three sections of the connecting tube (101) of the cylindrical body (10), the top end of the sampling tube (50) and the bottom end of the inner tube (20), and the sampling head (40) and the sampling tube (50) are all connected in a threaded manner; the sampling head (40) is a hollow structure, and the top end of the sampling head (40) is connected to the bottom end of the inner tube (20).

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