A sample dividing device

Abstract

The application discloses a sample separating device, which comprises a hopper, a stirring assembly, a sample separating assembly, a discharge channel, a sample falling channel and a collecting box. The stirring paddle of the stirring assembly is arranged in the hopper to stir and mix the sample. The sample separating assembly is arranged below the hopper outlet. The sample is separated into a sampling part and a redundant part by the sample separating assembly. The redundant part is discharged through the discharge channel. The sampling part is conveyed to the collecting box through the sample falling channel. The sample added into the hopper is automatically stirred and mixed by the stirring assembly, and manual operation is not needed, so that the labor intensity is reduced. After the sample is mixed, the sample is automatically separated by the sample separating assembly, only the sample of the sampling part is collected, and the sample of the redundant part is directly discharged, so that the workload is saved, time and labor are saved, one-time sample separation is adopted, the sample separation efficiency is effectively improved, and time is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material sampling, in particular to a sampling device. BACKGROUND

[0002] The grain sample taken from the grain depot needs to be sampled, that is, after the grain sample is fully mixed, a final sample of a certain weight is taken out. The currently used sampling equipment includes four-iron, horizontal format sampler and Zhongding type sampler.

[0003] When sampling, the sample needs to be fully mixed first. The traditional sampling equipment needs to be operated multiple times to mix the grain sample evenly, which is time-consuming and laborious. In addition, the traditional sampling equipment needs to be manually operated in the sampling process, which has many human intervention factors and is easy to cause the sampled sample to be not representative.

[0004] The four-iron divides the sample into four triangles by drawing two diagonal lines on the sample spread into an equal-thickness square, and takes out two opposite triangles. The remaining sample is spread into an equal-thickness square again, and the above steps are repeated until the remaining two opposite triangles approach the required sample weight. The horizontal format sampler divides the sample into two equal parts through a series of intersecting and opposite sliding channels, and takes out one part to continue the above arrangement until the divided sample approaches the required sample weight. The Zhongding type sampler uniformly divides the sample into two parts through a sampling grid, and repeats the mixing and sampling of the sample taken from one part until the divided sample approaches the required sample weight. The traditional sampling equipment needs to be repeatedly operated multiple times to obtain the required weight sample, which is time-consuming and laborious, and has low efficiency. In addition, the weight of the final sample is estimated by hand, which has a large error with the preset sample weight, and it is difficult to obtain a sample with accurate weight. The excess sample in the sampling process needs to be manually processed, which is time-consuming and laborious. SUMMARY

[0005] The technical problem to be solved by the present application and the technical task proposed are to improve the prior art and provide a sampling device to solve the problems of inconvenient use, multiple repetitive operation steps, time-consuming and laborious, and low sampling efficiency of the current sampling equipment.

[0006] To solve the above technical problems, the technical scheme of the present application is:

[0007] The application discloses a sample separating device, which comprises a hopper, a stirring assembly, a sample separating assembly, a discharge channel, a sample falling channel and a collecting box. The stirring assembly is arranged in the hopper to stir the sample, the sample separating assembly is arranged below the hopper outlet, the sample is separated into a sampling part and a redundant part by the sample separating assembly, the redundant part is discharged through the discharge channel, and the sampling part is conveyed to the collecting box through the sample falling channel. The sample separating device has the advantages that the sample added into the hopper is automatically stirred by the stirring assembly without manual operation, the labor intensity is reduced, the sample is automatically separated by the sample separating assembly after being stirred, only the sampling part of the sample is collected, the redundant sample is directly discharged without manual additional treatment, the workload is saved, time and labor are saved, the sample is fully stirred in the hopper, one-time sample separation is adopted, repetitive mixing and sample separation of the traditional sample separating device is not needed, the sample separating efficiency is effectively improved, and time is saved.

[0008] Further, the rotating shaft of the stirring paddle is along the direction of the hopper outlet, the stirring paddle is a spiral blade, the hopper is a conical hopper, the outer diameter of the spiral blade gradually changes along the rotating shaft, and the outer periphery of the spiral blade is attached to the inner wall of the hopper. The stirring paddle can fully stir the sample to achieve full mixing, avoid dead angles in stirring and mixing, and ensure that the final sample separated has representativeness. The spiral blade rotates forward to stir the sample in the hopper, and reversely rotates to discharge the sample from the hopper outlet. Since the outer periphery of the spiral blade is attached to the inner wall of the hopper, the forward rotation of the spiral blade can ensure that the sample is fully stirred and mixed, and ensure that the sample does not flow out of the hopper outlet during stirring. Only when the sample is fully stirred and mixed, the spiral blade reversely rotates to discharge the sample from the hopper outlet. During the discharging process, the spiral blade and the hopper form a spiral conveying mechanism to orderly push and discharge the sample from the hopper outlet.

[0009] Further, the sample separating assembly comprises a sample separating plate and a flow separating plate. The sample separating plate is conical with a small top end and a large bottom end. The top end of the sample separating plate is opposite to the hopper outlet. The flow separating plate is arranged on the circumference of the sample separating plate to divide the circumference of the sample separating plate into a plurality of flow channels. One flow channel is used for separating the sampling part, and the other flow channels are used for separating the redundant part. The structure is simple, sample separation is convenient and uniform, the sample flowing out of the hopper outlet is uniformly dispersed along the whole circumference of the conical sample separating plate under the action of the sample separating plate, so that the sample is uniformly dispersed into the flow channels distributed along the circumference of the sample separating plate, and the sampling part can be obtained by collecting the sample flowing out of one part of the flow channels. Since the sample is uniformly dispersed along the whole circumference of the sample separating plate, the sample of the sampling part is representative and can truly reflect the actual condition of the total sample.

[0010] Further, a guide slope is arranged below the sample separation assembly, the lower part of the guide slope is connected to the discharge channel to make the excess part flow to the discharge channel through the guide slope. The sample of the sampling part is only a small part of the total sample, while the sample of the excess part is a large part of the total sample, in other words, the sample of the excess part is large in amount and occupies a large flow channel and a large arc range in the circumferential direction of the sample separation plate. The guide slope is used for large-scale flow guide collection, so that the sample of the excess part can be effectively collected to the discharge channel, and the fullness of the discharge is guaranteed.

[0011] Further, the stirring assembly further comprises a motor for driving the stirring paddle to rotate, the motor is arranged below the sample separation plate, the space is more fully and reasonably utilized, the structure is compact, and the occupied volume is small.

[0012] Further, a valve assembly for opening and closing the outlet of the hopper is further included, the valve assembly comprises a valve plate, a driving shaft and a guide rod, the rotation axis of the stirring paddle is along the outlet direction of the hopper, the rotation axis of the stirring paddle extends to the outlet of the hopper to form the driving shaft, the driving shaft comprises a non-threaded section and a threaded section arranged in sequence along the outlet direction of the hopper, the guide rod is parallel to the driving shaft, the valve plate is slidingly arranged on the guide rod, a matching hole for the driving shaft to pass through is formed in the valve plate, when the threaded section is in the matching hole, the threaded section is screwed with the matching hole, and when the non-threaded section is in the matching hole, the non-threaded section can freely rotate and axially slide relative to the matching hole.

[0013] When the valve plate is in the non-threaded section, the valve plate blocks the outlet of the hopper to achieve a closed state, and when the valve plate is in the threaded section, the valve plate is away from the outlet of the hopper to achieve an open state.

[0014] The valve assembly is used to control the outlet of the hopper, so that the sample can be sent out from the outlet of the hopper after being fully stirred and mixed, and the sample of the sampling part obtained is not representative. The valve assembly adopts a linkage structure, and does not need to be additionally provided with a driving mechanism. The opening and closing of the outlet of the hopper is controlled by the stirring assembly. The driving shaft rotates synchronously with the stirring paddle. The sample in the hopper can be stirred and mixed while the outlet of the hopper is kept in a closed state. After the stirring and mixing treatment is completed, the stirring paddle is reversely rotated to switch the outlet of the hopper to an open state, so that the sample can flow out of the outlet of the hopper to the sample separation assembly for sample separation. The sample that has not been stirred and mixed cannot leak out of the outlet of the hopper to the sample separation assembly for sample separation in advance, and the sample obtained by sample separation is representative and can truly reflect the actual condition of the total sample.

[0015] Further, the stirring paddle rotates forward to keep the valve plate in the non-threaded section, and the stirring paddle stirs and mixes the sample in the hopper.

[0016] The stirring paddle is reversed and stopped to make the valve plate enter and stop at the threaded section, and the hopper outlet is switched to an open state for sample outflow.

[0017] The valve assembly and the stirring assembly are integrated, and both share a driving mechanism, which can reduce cost, improve structural compactness, reduce space occupation, and continuously rotate the stirring paddle to fully stir and mix the sample, keep the hopper outlet closed during stirring, and reverse the stirring paddle to open the hopper outlet for sample discharge after sufficient stirring and mixing.

[0018] Further, the movable baffle mechanism is switched between the first attitude and the second attitude, the sample part is transported to the collection box through the feeding channel when the movable baffle mechanism is in the first attitude, and the movable baffle mechanism guides the sample part to be transported to the discharge channel for discharge when the movable baffle mechanism is in the second attitude. After the required weight of the sample is collected in the collection box, the movable baffle mechanism is actuated to switch the attitude, so that the sample part originally leading to the collection box is guided to the discharge channel for direct discharge, thereby saving the workload and time and labor.

[0019] Further, the weight sensor is further included, and the weight sensor carries the collection box to weigh the weight of the sample in the collection box. The weight sensor is used to weigh the weight of the sample collected in the collection box in real time and accurately, so that the sample part can be continuously fed into the collection box when the weight of the sample reaches the required preset amount, thereby effectively improving the sample collection accuracy.

[0020] Further, the cylindrical shell is further included, and the hopper, the stirring assembly, the sample separation assembly, the discharge channel, the feeding channel and the collection box are arranged in the shell. The bottom of the shell is provided with a base, and the base is provided with traveling wheels. The structure is simple, compact, mobile, and convenient to use.

[0021] Further, the base is movably connected with a stake part, and the stake part is switched between a storage position and a deployment position. The stake part is used to be inserted into the sample pile to fix the sample separation device on the sample pile when the stake part is in the deployment position. The stake part can be used to fix the sample separation device directly on the sample pile, and the stake part is inserted into the sample pile to fix the sample separation device. When the stake part is not used, the stake part is switched to the storage position, and no additional space is occupied, and the normal use and movement of the sample separation device are not affected.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] The sample dividing device utilizes the stirring assembly to automatically stir and mix the sample added into the hopper, and one-time sample dividing is adopted, without repeated mixing and sample dividing as in traditional sample dividing equipment, so that the sample dividing efficiency is effectively improved, and time is saved;

[0024] The sample of the required weight can be accurately obtained, the excess sample is directly discharged, manual additional treatment of the excess sample is not needed, workload is saved, time and labor are saved;

[0025] The sample dividing device is good in mobility and can be conveniently fixed to the sample pile, the excess sample is directly returned to the sample pile, and use is more convenient and time-saving. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the sample dividing device;

[0027] Figure 2 It is a structure schematic view of the stirring paddle and the hopper;

[0028] Figure 3 It is a structure schematic view of the sample dividing assembly;

[0029] Figure 4 It is a structure schematic view of the discharge channel and the material falling channel;

[0030] Figure 5 It is a structure schematic view of the movable baffle mechanism;

[0031] Figure 6 It is a structure schematic view of the sample dividing device base;

[0032] Figure 7 It is a whole structure schematic view of the second embodiment of the sample dividing device;

[0033] Figure 8 It is a structure schematic view of the valve assembly.

[0034] In the drawings:

[0035] The hopper 1, the stirring assembly 2, the stirring paddle 21, the motor 22, the sample dividing assembly 3, the sample dividing plate 31, the flow dividing plate 32, the flow guiding slope 33, the discharge channel 4, the material falling channel 5, the collection box 6, the movable baffle mechanism 7, the baffle 71, the stepping motor 72, the weight sensor 8, the shell 9, the base 10, the walking wheel 11, the stake insertion part 12, the valve plate 23, the driving shaft 24, the guide rod 25, the non-threaded section 241 and the threaded section 242. DETAILED DESCRIPTION

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] The present invention discloses a sample separation device that automatically mixes and separates samples without the need for repetitive steps, effectively improving the separation efficiency, accurately obtaining the required sample weight, eliminating errors caused by manual estimation, automatically discharging excess samples, and eliminating the need for manual handling of excess samples, thus saving time and effort.

[0038] Example 1

[0039] like Figures 1 to 6 As shown, a sampling device mainly includes a hopper 1, a stirring assembly 2, a sampling assembly 3, a discharge channel 4, a discharge channel 5, and a collection box 6. The stirring paddle 21 of the stirring assembly 2 is placed in the hopper 1 to stir and mix the sample. The sampling assembly 3 is set below the outlet of the hopper 1. The sample is divided into a sampling part and an excess part by the sampling assembly 3. The excess part is discharged directly through the discharge channel 4, and the sampling part is transported to the collection box 6 through the discharge channel 5. The collection box 6 is supported by a weight sensor 8, which weighs the sample in the collection box 6 in real time. When the weight of the sample in the collection box 6 accurately reaches the required preset value, the feeding of the sampling part of the sample into the collection box 6 is stopped. The excess sampling part of the sample is guided to the discharge channel 4 and discharged directly. No additional manual processing is required, saving workload, time and effort.

[0040] Specifically, the sampling device is equipped with a movable baffle mechanism 7, which switches between a first posture and a second posture. When the movable baffle mechanism 7 is in the first posture, the sampling portion is transported to the collection box 6 through the discharge channel 5. When the movable baffle mechanism 7 is in the second posture, it guides the sampling portion to be discharged through the discharge channel 4. When the weight of the sample in the collection box 6 has not yet reached the required preset value, the movable baffle mechanism 7 remains in the first posture, and the sample from the sampling portion will be transported to the collection box 6 through the discharge channel 5. The weight of the sample in the collection box 6 continues to increase until the weight sensor 8 detects that the weight of the sample in the collection box 6 has precisely reached the required preset value. Then, the movable baffle mechanism 7 switches to the second posture, and the excess sample from the sampling portion will no longer enter the collection box 6. The excess sample from the sampling portion is guided by the movable baffle mechanism 7 to be directly discharged through the discharge channel 4. No additional manual processing of the excess sample from the sampling portion is required, saving manpower, time and effort.

[0041] The sample splitting device described in the embodiment utilizes the stirring assembly 2 to automatically stir and mix the sample added into the hopper 1, and after the sample is stirred and mixed, it is discharged from the outlet of the hopper 1, and the sample is automatically split by the sample splitting assembly, the excess sample is directly discharged, only the sampling part of the sample is collected, and the weight of the sample in the collection box 6 is weighed in real time by the weight sensor 8, when the sampling amount reaches the required preset value, the movable baffle mechanism 7 switches state, and the excess sampling part of the sample is guided by the movable baffle mechanism 7 to the discharge channel 4 and directly discharged. The sample splitting device described in the embodiment first fully stirs and mixes the sample, and then performs one-time sample splitting, without the need for repeated mixing and sample splitting, effectively improving the sample splitting efficiency.

[0042] The sample splitting device described in the embodiment further comprises a cylindrical housing 9, and the hopper 1, the stirring assembly 2, the sample splitting assembly 3, the discharge channel 4, the material falling channel 5 and the collection box 6 are arranged in the housing 9, which improves the overall equipment integrity. The housing 9 serves as a load-bearing member for carrying various components, ensuring the relative position of the components stable for reliable sample splitting. The hopper 1, the sample splitting assembly 3 and the collection box 6 are arranged in the housing 9 from top to bottom, and the discharge channel 4 and the material falling channel 5 are located between the sample splitting assembly 3 and the collection box 6. The discharge channel 4 is in communication with the discharge outlet formed on the wall surface of the housing 9, so that the excess part is directly discharged. The bottom of the housing 9 is provided with a base 10, and the weight sensor 8 is arranged on the base. A collection box shroud is arranged on the inner wall of the housing 9 to form a cavity for accommodating the collection box 6. The material falling channel 5 is in communication with the cavity, and the collection box 6 is plug-in arranged in the cavity. After the required sample is collected in the collection box 6, the collection box 6 can be pulled out for sample detection. When sample splitting and collection are required, the collection box 6 can be inserted into the cavity. The base 10 is further provided with a walking wheel 11, which is a universal wheel, improving the mobility of the sample splitting device, and making it easy to move the sample splitting device, improving the convenience of use.

[0043] In the embodiment, the hopper 1 is a conical hopper with a large top and a small bottom, the rotating shaft of the stirring paddle 21 is along the outlet direction of the hopper 1, the stirring paddle 21 is a spiral blade, and the outer diameter of the spiral blade gradually changes along the rotating shaft of the spiral blade. Specifically, the outer diameter of the spiral blade gradually decreases from top to bottom along the rotating shaft of the spiral blade. From the side, the spiral blade as a whole is conical. In order to fully mix and stir the sample added to the hopper 1, the outer periphery of the spiral blade is attached to the inner wall of the hopper 1, thereby avoiding the existence of dead angles that cannot be stirred by the spiral blade, improving the fullness of mixing and stirring, and the stirring paddle 21 and the hopper 1 form a structure similar to a screw conveyor. The spiral blade rotates forward (the forward rotation is not specifically limited to clockwise rotation or counterclockwise rotation, mainly to indicate that the spiral blade has different functions when rotating forward and reversing) to mix and stir the sample in the hopper 1. At this time, the spiral blade has an upward turning effect on the sample, and the sample cannot be discharged from the outlet of the hopper 1 at this time. When the sample is fully mixed and stirred, the rotating direction of the spiral blade is switched to reverse rotation, so that the spiral blade has a downward pushing effect on the sample, so that the sample is orderly discharged from the outlet of the hopper 1.

[0044] The sample separation assembly 3 specifically used in the embodiment includes a sample separation plate 31 and a flow separation plate 32. The sample separation plate 31 is conical with a small top and a large bottom. The top end of the sample separation plate 31 is opposite the outlet of the hopper 1, that is, the top of the conical sample separation plate 31 is opposite the outlet of the hopper 1. Therefore, the sample discharged from the outlet of the hopper 1 is uniformly dispersed and falls along the entire circumference of the conical sample separation plate 31 under the action of the conical sample separation plate 31. The conical sample separation plate 31 uniformly disperses the sample. A plurality of flow separation plates 32 are arranged at intervals in the circumferential direction of the sample separation plate 31 to separate the circumferential direction of the sample separation plate 31 into a plurality of flow channels. One part of the flow channels is used to separate the sampling part of the sample, and the other part of the flow channels is used to separate the excess part of the sample. After the sample is uniformly dispersed under the action of the sample separation plate 31, the sample uniformly enters the circumferentially distributed flow channels. The sample passing through one part of the flow channels is selected as the sampling part to achieve one-time sampling. Since the sample in the hopper 1 has been fully mixed and stirred, and the sample is uniformly dispersed under the action of the sample separation plate 31, the sampling part obtained by intercepting the sample in only part of the flow channels is representative and can truly reflect the actual condition of the total sample. There is no need to repeatedly mix and separate samples as in the prior art, and the sampling efficiency is effectively improved.

[0045] The stirring assembly 2 further comprises a motor 22 for driving the stirring paddle 21 to rotate, in order to improve the structural compactness, the motor 22 is arranged below and inside the sample dividing plate 31, that is, the motor 22 is arranged in the conical inner cavity of the sample dividing plate 31, a support plate is arranged in the conical inner cavity of the sample dividing plate 31, and the motor 22 is fixedly installed on the support plate, and the output shaft of the motor 22 penetrates out of the top end of the conical sample dividing plate 31 to be connected with the stirring paddle 21, so that the space is more fully utilized and the overall volume of the sample dividing device is reduced.

[0046] The sample of the sampling part is only a small part of the total sample, and the sample of the excess part is a large part of the total sample, in other words, the amount of the sample of the excess part is large, and the flow channel for diverting the excess part of the sample has a wide distribution range, in order to sufficiently collect the excess part of the sample, a flow guide slope 33 is arranged below the sample dividing assembly 3, the lower part of the flow guide slope 33 is connected with the discharge channel 4 to collect the excess part through the flow guide slope 33 and discharge it to the discharge channel 4, specifically, the flow guide slope 33 comprises an inclined plate arranged on the inner wall of the shell 9 and inclined downward, the discharge channel 4 has a U-shaped groove structure, and the inclined plate is arranged at the two side walls of the U-shaped groove and also arranged at the end side of the U-shaped groove, the flow guide slope 33 has a structure that the upper part has a large diameter and the lower part has a narrow diameter, so that the sample of the excess part can be fully and smoothly collected to the discharge channel 4 for discharge.

[0047] In the embodiment, the material falling channel 5 is a vertical pipeline, the discharge channel 4 is an inclined downward channel, the wall surface of the material falling channel 5 is open and communicated to the discharge channel 4, and a movable baffle mechanism 7 is arranged at the wall surface opening of the material falling channel 5, the movable baffle mechanism 7 specifically comprises a baffle 71 and a stepping motor 72, the baffle 71 is rotationally arranged at the wall surface opening of the material falling channel 5, and the stepping motor 72 drives the baffle 71 to rotate to switch between a first posture and a second posture, when the baffle 71 is in the first posture, the material falling channel 5 is in a conductive state, and the sample of the sampling part can smoothly enter the collection box 6 from the material falling channel 5, while when the baffle 71 is in the second posture, the baffle 71 cuts off and closes the material falling channel 5, and the excess sample of the sampling part is blocked by the baffle 71 and guided to the discharge channel 4 for discharge, so as to ensure that after the sample with the required preset weight is accurately obtained, the excess sample of the sampling part will not enter the collection box 6, the movable baffle mechanism 7 automatically switches the state to automatically discharge the excess sample of the sampling part from the discharge channel 4, without the need for manual additional treatment, saving manpower and improving the use convenience.

[0048] In the embodiment, the base 10 is also movably connected with a pile inserting part 12, which is switched between a storage position and a deployment position. When the pile inserting part 12 is in the deployment position, it is used to be inserted into the sample pile to fix the sample dividing device on the sample pile, so that the sample dividing device can be conveniently used on the sample pile, the flexibility and applicability of the sample dividing device are improved, and the sample dividing device can be used in complex environment instead of only being used on flat ground. The pile inserting part 12 is directly inserted into the sample pile to stably fix the sample dividing device, which is convenient and fast to use and can guarantee the stability of the device during the whole sample dividing process, so that the condition of the device falling down does not occur, the safety and reliability of use are guaranteed. Specifically, the pile inserting part 12 is rotationally connected with the base 10 and is switched between the downward protruding deployment position and the storage position close to the bottom surface of the base 10 by rotating. The pile inserting part 12 is arranged at intervals along the circumference of the base 10, so as to improve the stability of the pile inserting part 12 inserted into the sample pile. The pile inserting part 12 is in a plate shape, and the lower end thereof is in a sharp angle shape, so as to be conveniently and easily inserted into the sample pile.

[0049] Embodiment Two

[0050] In the embodiment one, the helical blade close to the inner wall of the hopper 1 is used to avoid the sample from leaking out of the outlet of the hopper during the stirring and mixing process. However, the effect of this structure is limited. It is difficult for the helical blade to completely close the outlet of the hopper by rotating in the positive direction, and part of the sample may still leak out of the outlet of the hopper before being stirred and mixed, which affects the representativeness of the sample of the obtained sampling part and makes it difficult to truly reflect the actual condition of the total sample.

[0051] The embodiment Figure 7 and Figure 8As shown, the sample dividing device is further provided with a valve assembly for opening and closing the outlet of the hopper 1. The valve assembly is used to fully close the outlet of the hopper 1 to ensure that the sample does not leak out of the outlet of the hopper 1 before being stirred evenly, thereby effectively ensuring that the obtained sample of the sampling part is representative and can truly reflect the actual condition of the total sample. Specifically, the valve assembly includes a valve plate 23, a driving shaft 24 and a guide rod 25. The rotation axis of the stirring paddle 21 is along the outlet direction of the hopper 1. The rotation axis of the stirring paddle 21 extends to the outlet of the hopper 1 to form the driving shaft 24. The driving shaft 24 includes a non-threaded section 241 and a threaded section 242 arranged in sequence along the outlet direction of the hopper 1. Specifically, the outlet of the hopper 1 is vertically downward, so that the rotation axis of the stirring paddle 21 is along the vertical direction. The guide rod 25 is parallel to the driving shaft 24. The valve plate 23 is slidingly arranged on the guide rod 25. A matching hole is formed in the valve plate 23 for the driving shaft 24 to pass through. When the threaded section 242 is in the matching hole, the threaded section 242 is screwed with the matching hole for transmission. When the non-threaded section 241 is in the matching hole, the non-threaded section 241 can freely rotate and axially slide relative to the matching hole. In other words, the diameter of the matching hole is greater than the outer diameter of the non-threaded section 241, and the matching hole does not transmit with the non-threaded section 241. When the valve plate 23 is in the non-threaded section 241, the valve plate 23 blocks the outlet of the hopper 1 to achieve a closed state. When the valve plate 23 is in the threaded section 242, the valve plate 23 is away from the outlet of the hopper 1 to achieve an open state.

[0052] In this embodiment, the valve assembly and the stirring assembly are integrated together, and share a driving mechanism, i.e., share a motor. The motor is used to drive the stirring paddle 21 to rotate to stir the sample in the hopper 1, and is also used to drive the driving shaft 24 to rotate to drive the valve plate 23 to move along the axial direction of the driving shaft 24, thereby achieving the opening and closing of the outlet of the hopper. The guide rod 25 guides the valve plate 23 to move along the axial direction of the driving shaft 24 accurately. The guide rod 25 can be specifically arranged in parallel and spaced apart, including three, four or the like. In this embodiment, the guide rod 25 is distributed in the circumferential direction of the driving shaft 24. The guide rod 25 can be fixedly arranged on the outer wall of the hopper 1 or on the sample dividing plate 31 to ensure that the valve plate 23 can be stably guided.

[0053] When the motor drives the stirring paddle 21 to rotate forward, the pushing direction of the threaded segment 242 to the valve plate 23 is toward the side where the non-threaded segment 241 is located. The rotation of the driving shaft 24 makes the valve plate 23 move along the axial direction of the driving shaft 24 to approach the non-threaded segment 241 until the valve plate 23 moves to the boundary between the threaded segment 242 and the non-threaded segment 241, and finally the valve plate 23 is completely separated from the threaded segment 242 and enters the non-threaded segment 241. The non-threaded segment 241 and the matching hole do not transmit power, so the valve plate 23 remains in the current position in the non-threaded segment 241. Under the action of gravity, the valve plate 23 falls to the position where it is in contact with the threaded segment 242, but the threaded segment 242 always pushes the valve plate 23 to the non-threaded segment 241, so the valve plate 23 remains in the non-threaded segment 241. At this time, the valve plate 23 blocks the outlet of the hopper 1 to achieve the closed state. The valve plate 23 does not hinder the rotation of the non-threaded segment 241, that is, it does not hinder the rotation of the stirring paddle 21. The motor continues to drive the stirring paddle 21 to rotate forward, and the valve plate 23 remains in the current position, that is, the outlet of the hopper 1 remains in the closed state. Therefore, the stirring paddle 21 continues to rotate forward to stir and mix the sample in the hopper 1. The spiral blade produces an upward turning effect on the sample to achieve the purpose of continuously stirring and mixing the sample evenly.

[0054] After the sample is stirred and mixed evenly, the motor drives the stirring paddle 21 to rotate reversely. The pushing direction of the threaded segment 242 to the valve plate 23 becomes reverse, that is, toward the side away from the non-threaded segment 241. Under the action of gravity, the valve plate 23 falls to the position where it is in contact with the threaded segment 242. The matching hole of the valve plate 23 is re-screwed with the threaded segment 242. At this time, the pushing direction of the threaded segment 242 to the valve plate 23 is downward, so that the valve plate 23 moves downward along the threaded segment 242 to move away from the outlet of the hopper 1 to achieve the open state. After the stirring paddle 21 reversely rotates and stops, the valve plate 23 enters and stops in the threaded segment 242. The motor cannot drive the stirring paddle 21 to continuously rotate reversely, otherwise the valve plate 23 will continuously move downward along the threaded segment 242 and fall out of the threaded segment 242, or the matching hole and the threaded segment 242 will be damaged due to slipping. Therefore, the motor drives the stirring paddle 21 to reversely rotate for a predetermined number of turns and then stops, so that the outlet of the hopper 1 is fully opened.

[0055] In the embodiment, the motor for driving the stirring paddle 21 to rotate can still be arranged inside below the sample dividing plate 31, the driving shaft 24 passes through the top of the sample dividing plate 31 to be in transmission connection with the motor, the stirring paddle 21 can adopt a spiral blade, or can adopt a paddle of other structure; in order to guarantee the uniformity of sample division, the valve plate 23 is conical with the top small and the bottom large, the cooperation hole is arranged at the top end of the cone, when the outlet of the hopper 1 is in the open state, the sample flowing out from the outlet of the hopper 1 first contacts the valve plate 23, the conical valve plate 23 plays a role of uniformly dispersing and falling the sample along the whole circumference, then the sample further uniformly disperses and falls along the whole circumference under the action of the sample dividing plate 31, which is favorable for the sample of the sampling part to be representative, and can truly reflect the actual condition of the total sample.

[0056] The above is only the preferred embodiment of the present application, it should be pointed out that the above preferred embodiment should not be regarded as the limitation of the present application, the protection scope of the present application should be limited by the scope defined by the claims. For the ordinary skilled in the art, several improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A sample splitting device, characterized by, The device comprises a hopper (1), a stirring assembly (2), a sample separating assembly (3), a discharge channel (4), a sample dropping channel (5) and a collecting box (6), the stirring assembly (2) is provided with a stirring paddle (21) in the hopper (1) to stir and mix the sample, the sample separating assembly (3) is arranged below the outlet of the hopper (1), the sample is separated into a sampling part and a surplus part by the sample separating assembly (3), the surplus part is discharged through the discharge channel (4), and the sampling part is transported to the collecting box (6) through the sample dropping channel (5); The device further comprises a valve assembly for opening and closing the outlet of the hopper (1), the valve assembly comprises a valve plate (23), a driving shaft (24) and a guide rod (25), the rotation axis of the stirring paddle (21) is along the outlet direction of the hopper (1), the rotation axis of the stirring paddle (21) extends to the outlet of the hopper (1) to form the driving shaft (24), the driving shaft (24) comprises a non-threaded section (241) and a threaded section (242) arranged in sequence along the outlet direction of the hopper (1), the guide rod (25) is parallel to the driving shaft (24), the valve plate (23) is slidingly arranged on the guide rod (25), the valve plate (23) is provided with a matching hole for the driving shaft (24) to pass through, when the threaded section (242) is in the matching hole, the threaded section (242) is screwed with the matching hole, and when the non-threaded section (241) is in the matching hole, the non-threaded section (241) can freely rotate and axially slide relative to the matching hole; When the valve plate (23) is in the non-threaded section (241), the valve plate (23) blocks the outlet of the hopper (1) to achieve a closed state, and when the valve plate (23) is in the threaded section (242), the valve plate (23) is away from the outlet of the hopper (1) to achieve an open state; The stirring paddle (21) rotates forward to keep the valve plate (23) in the non-threaded section (241), and the stirring paddle (21) stirs and mixes the sample in the hopper (1); After the stirring paddle (21) rotates reversely and stops, the valve plate (23) enters and stops in the threaded section (242), and the outlet of the hopper (1) switches to the open state to discharge the sample.

2. The sample dividing device according to claim 1, wherein The rotation axis of the stirring paddle (21) is along the outlet direction of the hopper (1), the stirring paddle (21) is a spiral blade, the hopper (1) is a conical hopper, the outer diameter of the spiral blade gradually changes along the rotation axis, and the outer periphery of the spiral blade is attached to the inner wall of the hopper (1).

3. The sample dividing device according to claim 1, wherein The sample separating assembly (3) comprises a sample separating plate (31) and a flow separating plate (32), the sample separating plate (31) is conical with a small top and a large bottom, the top end of the sample separating plate (31) is opposite to the outlet of the hopper (1), and a plurality of flow separating plates (32) are arranged on the circumference of the sample separating plate (31) to divide the circumference of the sample separating plate (31) into a plurality of flow channels, one part of the flow channels is used for separating the sampling part, and the other part of the flow channels is used for separating the surplus part.

4. The sample dividing device according to claim 3, wherein A flow guide slope (33) is arranged below the sample dividing assembly (3), and the lower part of the flow guide slope (33) is connected with the discharge channel (4) to make the excess part flow through the flow guide slope (33) and be discharged to the discharge channel (4).

5. The sample dividing device according to claim 3, wherein The stirring assembly (2) further comprises a motor (22) for driving the stirring paddle (21) to rotate, and the motor (22) is arranged below the inside of the sample dividing plate (31).

6. The sample dividing device according to any one of claims 1 to 5, characterized by The movable baffle mechanism (7) is further arranged, and the movable baffle mechanism (7) is switched between a first posture and a second posture; when the movable baffle mechanism (7) is in the first posture, the sample part is conveyed to the collection box (6) through the material falling channel (5); when the movable baffle mechanism (7) is in the second posture, the movable baffle mechanism (7) guides the sample part to be conveyed to the discharge channel (4) to be discharged.

7. The sample dividing device according to any one of claims 1 to 5, wherein The weight sensor (8) is further arranged, and the weight sensor (8) carries the collection box (6) to weigh the weight of the sample in the collection box (6).

8. The sample dividing device according to any one of claims 1 to 5, characterized by The cylindrical shell (9) is further arranged, and the hopper (1), the stirring assembly (2), the sample dividing assembly (3), the discharge channel (4), the material falling channel (5) and the collection box (6) are arranged in the shell (9), the bottom of the shell (9) is provided with the base (10), the base (10) is provided with the walking wheel (11), the base (10) is movably connected with the stake inserting part (12), the stake inserting part (12) is switched between a storage position and a deployment position, and the stake inserting part (12) is used for inserting into the sample pile to fix the sample dividing device on the sample pile when the stake inserting part (12) is in the deployment position.

Images