A solid powder sampler, automatic sampling device, equipment and method

Abstract

The present invention discloses a solid powder sampler, an automatic sampling device, equipment and method. The sampler includes a fine sampling piece and a rough sampling piece. The fine sampling piece has an inner sampling end, the fine sampling piece is provided with an inner sampling hole, and one end of the inner sampling hole is connected to the outside from the inner sampling end. A gas interface is provided on the fine sampling piece, and the gas interface is connected to the inner sampling hole for external ventilation equipment. The rough sampling piece includes an outer carrier and an outer powder moving piece, the outer powder moving piece is provided with an outer sampling hole, the fine sampling piece part extends into the outer sampling hole and is slidably connected thereto, and the inner sampling end is located in the outer sampling hole, and the part of the outer sampling hole that is not slidably connected with the fine sampling piece cooperates with the inner sampling end to form a rough sampling interval. The outer carrier and the outer powder moving piece are detachably connected, and the outer carrier and the fine sampling piece are slidably connected along the axial direction of the outer sampling hole. When using the present invention to obtain a high-precision solid powder amount, firstly, a solid powder amount close to the requirement is obtained by rapid sampling and lofting, and then a high-precision solid powder amount is obtained by precise sampling and lofting.

Description

Technical Field

[0001] The invention belongs to the technical field of weighing solid powder in trace amounts with high precision, and in particular relates to a solid powder sampler, an automatic sampling device, equipment and a method. Background Art

[0002] In the production process of various fields, in order to control product quality, it is necessary to test the product. Often the product is a solid powder. During the testing process, it is necessary to weigh a small amount of solid powder with high precision.

[0003] The characteristics of the product have determined that this kind of sample can only be prepared in the form of solid powder. In solid powder sampling, the first problem that needs to be solved is the sampling and weighing of solid powder. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a solid powder sampler, an automatic sampling device, equipment and method.

[0005] The technical solution of the present invention is:

[0006] A solid powder sampler, comprising:

[0007] A fine sampling piece has an inner sampling end, the fine sampling piece is provided with an inner sampling hole, and one end of the inner sampling hole is connected to the outside from the inner sampling end; a gas interface is provided on the fine sampling piece, the gas interface is connected to the inner sampling hole, and is used to connect to an external ventilation device;

[0008] The coarse sampling component comprises an outer carrier and an outer powder moving component, the outer powder moving component is provided with an outer sampling hole, the fine sampling component partially extends into the outer sampling hole and is slidably connected thereto, and the inner sampling end is located in the outer sampling hole, and the portion of the outer sampling hole that is not slidably connected to the fine sampling component cooperates with the inner sampling end to form a coarse sampling interval; the outer carrier and the outer powder moving component are detachably connected, and the outer carrier and the fine sampling component are slidably connected along the axial direction of the outer sampling hole.

[0009] In a solid powder sampler in a certain embodiment, the fine sampling member includes an inner carrier and an inner powder moving member, the inner sampling end and the inner sampling hole are arranged on the inner powder moving member, and the inner powder moving member is slidably connected to the outer sampling hole;

[0010] The inner powder moving part is detachably connected to the inner carrier, and the inner carrier and the outer carrier are slidably connected along the axial direction of the outer sampling hole;

[0011] The gas interface is arranged on the inner powder moving part or the inner carrier.

[0012] In a solid powder sampler in a certain embodiment, the inner powder moving part comprises an inner powder moving rod and an inner mounting groove, the inner powder moving rod is connected to the outer bottom surface of the inner mounting groove, the inner powder moving rod is provided with the inner sampling hole along the axial direction, and the inner sampling hole is connected to the inside of the inner mounting groove; the inner powder moving rod extends into the outer sampling hole and is slidably connected thereto;

[0013] An inner elastic block is provided on the inner side wall of the inner installation groove, and an inner slot matching the inner elastic block is provided on the inner carrier. The inner elastic block is engaged with the inner slot to achieve a detachable connection between the inner installation groove and the inner carrier.

[0014] In a solid powder sampler in a certain embodiment, an inner carrier hole is provided on the inner carrier, one end of the inner carrier hole is connected to the inner mounting groove, and the other end is provided with the gas interface.

[0015] In a solid powder sampler in a certain embodiment, the external powder moving part comprises an external powder moving rod and an external mounting groove, the external powder moving rod is connected to the outer bottom surface of the external mounting groove, the external powder moving rod is provided with the external sampling hole along the axial direction, and the external sampling hole is connected with the inside of the external mounting groove; the internal mounting groove is provided in the external mounting groove;

[0016] An outer elastic block is provided on the inner side wall of the outer mounting groove, and an outer slot matching the outer elastic block is provided on the outer carrier. The outer elastic block is engaged with the outer slot to realize a detachable connection between the outer carrier and the outer powder moving member.

[0017] In a solid powder sampler of a certain embodiment, along the axial direction of the outer sampling hole, the distance between the outer bottom surface of the inner mounting groove and the inner bottom surface of the outer mounting groove is smaller than the distance between the outer carrier and the inner mounting groove;

[0018] The outer bottom surface of the inner installation groove abuts against and pushes the inner bottom of the outer installation groove, so that the outer installation groove is separated from the outer carrier; the outer carrier abuts against and pushes the inner installation groove, so that the inner installation groove is separated from the inner carrier.

[0019] An automatic sampling device for solid powder comprises a driving component and the solid powder sampler as described above, wherein the driving component is respectively connected to the fine sampling component and the external carrier, and is used to respectively drive the fine sampling component and the external carrier to move, so as to realize the fine sampling component sliding in the external sampling hole.

[0020] An automatic sampling device for solid powders, comprising a driving component, a powder transfer head carrier, and the solid powder sampler as described above, wherein the driving component is connected to the outer carrier and the inner carrier respectively, and is used to drive the outer carrier and the inner carrier to move respectively to achieve relative sliding between the two.

[0021] The outer powder moving piece sleeve is arranged outside the inner powder moving piece, and the outer powder moving piece sleeve and the inner powder moving piece form a powder moving head; the powder moving head carrier is provided with a plurality of placement positions, and the placement positions are used to place the unused powder moving heads;

[0022] The outer carrier and the inner carrier constitute a carrier, and the carrier not connected with the powder transfer head is connected with the powder transfer head located on the powder transfer head carrier under the drive of the driving component.

[0023] In a certain embodiment of the automatic sampling device for solid powder, the driving assembly includes an external driving part and an internal driving part, the output end of the external driving part is respectively connected to the fixed end of the internal driving part and the external carrier, and the output end of the internal driving part is connected to the internal carrier.

[0024] An automatic sampling device for solid powder, comprising:

[0025] The automatic sampling device as described above;

[0026] A solid powder loading component, used for loading solid powder to be sampled;

[0027] A weighing assembly, comprising a weighing device and a sample preparation container, wherein the sample preparation container is used to load the solid powder after sampling, and the sample preparation container is placed on the weighing device;

[0028] The moving component is connected to the driving component and is used to drive the sampler to move along a track, and the track passes through the solid powder loading component, the powder transfer head carrier and the sample preparation container.

[0029] In a certain embodiment of the automatic sampling device for solid powder, the solid powder loading assembly includes a solid powder carrier and a powder mixer;

[0030] The solid powder carrier is loaded with at least one solid powder container, and the solid powder container is used to hold the solid powder to be sampled;

[0031] The powder distributor is connected to the solid powder carrier and is used to drive the solid powder carrier to move so that the solid powder in the solid powder carrier is evenly distributed at the bottom of the solid powder carrier.

[0032] The automatic sampling device for solid powder in a certain embodiment further includes a waste container, wherein the waste container is used to store the used powder transfer head.

[0033] The automatic sampling device for solid powder in a certain embodiment further includes a main body bracket, the moving component is fixedly connected to the main body bracket, and the solid powder loading component, the powder transfer head carrier, the waste container and the weighing component are all assembled on the main body bracket.

[0034] A solid powder sampling method, applicable to the solid powder sampler as described above, comprising a rapid sampling and placing step, an unloading and externally removing powder part step and a precise sampling and placing step;

[0035] The fast sampling and setting out step includes a fast sampling step and a fast setting out step located after the fast sampling step;

[0036] The rapid sampling step: the rough sampling interval extends into the solid powder pile to be sampled, and then leaves the solid powder pile to be sampled to obtain part of the solid powder;

[0037] The rapid sampling step: the fine sampling member slides in the outer sampling hole to reduce the volume of the rough sampling interval, and the fine sampling member pushes the solid powder away from the rough sampling interval;

[0038] The step of unloading the externally moved powder pieces: removing the externally moved powder pieces from the external carrier;

[0039] The precise sampling and lofting comprises a precise sampling step and a precise lofting step after the precise sampling step;

[0040] The precise sampling step: the precise sampling member extends into the solid powder pile to be sampled, and obtains part of the solid powder in the inner sampling hole;

[0041] The precise sampling step includes: ventilating the inner sampling hole from the gas interface, and the gas blows the solid powder away from the inner sampling hole.

[0042] An automatic sampling method for solid powder is applicable to the automatic sampling device for solid powder as described above, wherein the solid powder loading component is loaded with solid powder to be sampled, and the automatic sampling method comprises:

[0043] S1: transferring part of the solid powder from the solid powder loading assembly to the sampling container through the rough sampling interval in the sampler, and repeating the transfer process until the weight of the sampling container and the substance therein reaches a first threshold;

[0044] S2: detaching the external powder removal part in the sampler from the external carrier;

[0045] S3: transferring part of the solid powder from the solid powder loading assembly to the sampling container through the inner sampling hole in the sampler, and repeating the transfer process until the weight of the sampling container and the substance therein reaches a second threshold.

[0046] A method for automatically sampling solid powders, applicable to the automatic sampling device for solid powders as described above, wherein the solid powder loading assembly is loaded with solid powders to be sampled, and the method for automatically sampling solid powders comprises:

[0047] A portion of the solid powder is transferred from the solid powder loading assembly to the sampling container through the coarse sampling interval in the sampler, and the transfer process is repeated until the weight of the sampling container and the material therein reaches a set value.

[0048] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0049] The present invention can obtain a trace amount of solid powder with high precision. Specifically, when the present invention is used, there are two sampling and setting out modes, namely, rapid sampling and setting out and precise sampling and setting out. When the amount of solid powder is required to be highly precise, firstly, a solid powder amount close to the requirement is obtained by rapid sampling and setting out, and then a high-precision solid powder amount is obtained by precise sampling and setting out.

[0050] The operation process of rapid sampling and setting out is as follows: extend one end of the sampler provided with a coarse sampling interval into the solid powder pile to be sampled, and then leave the solid powder pile to be sampled, and some solid powder will be obtained in the coarse sampling interval (the amount of solid powder obtained each time can be adjusted by controlling the depth of the fine sampling piece extending into the outer sampling hole and changing the volume of the coarse sampling interval), and the sampling is completed; the fine sampling piece is further extended and slid into the outer sampling hole to reduce the volume of the coarse sampling interval, so that the fine sampling piece pushes the solid powder away from the coarse sampling interval to complete the setting out process.

[0051] The operation process of precision sampling and layout is as follows: first, the external powder piece needs to be removed from the external carrier, and then the internal sampling end of the precision sampling piece is extended into the solid powder pile to be sampled, and some solid powder will be obtained in the internal sampling hole (the extension degree is controlled to adjust the amount of solid powder obtained by sampling), and the sampling is completed; air is ventilated from the gas interface to the internal sampling hole, and the gas blows the solid powder away from the internal sampling hole to complete the layout process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0053] Figure 1 It is a structural schematic diagram of an automatic sampling device for solid powder of the present invention;

[0054] Figure 2 It is a structural schematic diagram of an internal driving part and a sampler of the present invention;

[0055] Figure 3 A schematic diagram of the rapid sampling step of the present invention;

[0056] Figure 4 A schematic diagram of the rapid lofting step of the present invention;

[0057] Figure 5 A schematic diagram of the precision sampling step of the present invention;

[0058] Figure 6 A schematic diagram of the precision lofting step of the present invention;

[0059] Figure 7 The present invention is a flow chart of an automatic sampling process of solid powder.

[0060] Description of reference numerals:

[0061] 1: Main support; 2: Moving assembly; 3: External drive unit; 4: Internal drive unit; 401: Fixed block; 402: Motor; 403: Movable block; 5: External carrier; 6: Internal carrier; 7: Powder transfer head; 701: Internal powder transfer part; 702: External powder transfer part; 8: Solid powder loading assembly; 801: Solid powder carrier; 802: Solid powder container; 803: Vibrator; 9: Powder transfer head carrier; 10: Waste container; 11: Weighing assembly; 1101: Sample preparation container; 1102: Scale; 12: Solid powder. DETAILED DESCRIPTION

[0062] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0063] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0064] For ease of description, the following specific description will be given in the orientation shown in the accompanying drawings, but it should be noted that this is not a limitation on the direction of the structure and method in the embodiments.

[0065] Example 1

[0066] See also Figures 3 to 6, this embodiment provides a sampler for solid powder, including a fine sampling piece and a coarse sampling piece. The fine sampling piece has an inner sampling end, the fine sampling piece is provided with an inner sampling hole, and one end of the inner sampling hole is connected to the outside from the inner sampling end. A gas interface is provided on the fine sampling piece, and the gas interface is connected to the inner sampling hole for external ventilation equipment. The coarse sampling piece includes an outer carrier 5 and an outer powder moving piece 702, the outer powder moving piece 702 is provided with an outer sampling hole, the fine sampling piece part extends into the outer sampling hole and is slidably connected thereto, and the inner sampling end is located in the outer sampling hole, and the part of the outer sampling hole that is not slidably connected to the fine sampling piece cooperates with the inner sampling end to form a coarse sampling interval. The outer carrier 5 and the outer powder moving piece 702 are detachably connected, and the outer carrier 5 and the fine sampling piece are slidably connected along the axial direction of the outer sampling hole.

[0067] The sampler using solid powder has a rapid sampling and placing function and a precise sampling and placing function, which specifically at least includes a rapid sampling and placing step, an unloading and removing powder piece 702 step and a precise sampling and placing step.

[0068] The rapid sampling and placing step includes a rapid sampling step and a rapid placing step after the rapid sampling step. The rapid sampling step is as follows: the coarse sampling section extends into the pile of solid powder 12 to be sampled, and then leaves the pile of solid powder 12 to be sampled, to obtain part of the solid powder 12 (the amount of solid powder 12 obtained in each sampling can be adjusted by controlling the depth of the fine sampling piece extending into the outer sampling hole and changing the volume of the coarse sampling section). The rapid placing step is as follows: the fine sampling piece slides in the outer sampling hole to reduce the volume of the coarse sampling section, and the fine sampling piece pushes the solid powder 12 away from the coarse sampling section.

[0069] The step of unloading the externally moved powder piece 702 is: removing the externally moved powder piece 702 from the external carrier 5 .

[0070] Precision sampling and setting out includes a precision sampling step and a precision setting out step after the precision sampling step. The precision sampling step is as follows (at this time, the external powder piece 702 has been removed from the external carrier 5): the precision sampling piece extends into the pile of solid powder 12 to be sampled, and obtains part of the solid powder 12 in the inner sampling hole (controlling the extension degree to adjust the amount of solid powder 12 obtained by sampling). The precision setting out step is as follows: ventilate the inner sampling hole from the gas interface, and the gas blows the solid powder 12 away from the inner sampling hole.

[0071] The solid powder sampler provided in this embodiment can obtain a trace amount of solid powder 12 with high precision. Specifically, when using the solid powder sampler to obtain a trace amount of solid powder 12 with high precision, the amount of solid powder 12 close to the requirement can be obtained by rapid sampling and then the amount of solid powder 12 with high precision can be obtained by precise sampling and.

[0072] The structure of this embodiment is now described.

[0073] Trace refers to the unit of milligrams, and the minimum can be a few tenths of a milligram. In order to extract trace solid powder 12, the outer sampling holes and the inner sampling holes in this embodiment can be designed to be small apertures. The solid powder sampler provided in this embodiment can be applied to the weighing fields that require trace amounts of solid powder 12 with high precision, including but not limited to the fields of pharmaceutical production analysis, cement production analysis, and glass fiber production analysis. Solid powder 12 includes but is not limited to flocculent and granular solid powders 12 such as medicines, glass fibers, cement raw materials, and foods. The sampler is inserted into the pile of solid powder 12, and part of the solid powder 12 will enter the sampling interval in the outer sampling hole. When the sampler is lifted, the solid powder 12 particles entering the sampling interval will generate friction between each other, so that the solid powder 12 in the sampling interval forms a whole, and at the same time, the solid powder 12 particles at the edge will generate friction with the inner wall of the outer sampling hole, so that the solid powder 12 remains in the sampling hole.

[0074] The fine sampling part includes an inner carrier 6 and an inner powder moving part 701. The inner sampling end and the inner sampling hole are arranged on the inner powder moving part 701. The inner powder moving part 701 is slidably connected to the outer sampling hole. The inner powder moving part 701 is detachably connected to the inner carrier 6. The inner carrier 6 and the outer carrier 5 are slidably connected along the axial direction of the outer sampling hole.

[0075] The inner powder moving part 701 includes an inner powder moving rod and an inner mounting groove. The inner powder moving rod is connected to the outer bottom surface of the inner mounting groove. The inner powder moving rod is provided with an inner sampling hole along the axial direction, and the inner sampling hole is connected to the inside of the inner mounting groove; wherein, the inner sampling hole can be a small through hole provided along the axis of the inner powder moving rod, which is used to remove trace solid powder 12. The inner powder moving rod extends into the outer sampling hole and is slidably connected thereto. An inner elastic block is provided on the inner side wall of the inner mounting groove, and an inner slot matching the inner elastic block is provided on the inner carrier 6. The inner elastic block is engaged with the inner slot to realize the detachable connection between the inner mounting groove, that is, the inner powder moving part 701 and the inner carrier 6; of course, in other embodiments, the detachable connection between the inner carrier 6 and the inner powder moving part 701 can also be other connection methods.

[0076] The gas interface can be provided on the inner powder moving part 701 or the inner carrier 6. In this embodiment, the gas interface is provided on the inner carrier 6. Specifically, an inner carrier hole can be provided on the inner carrier 6, one end of the inner carrier hole is connected to the inner mounting groove, and the other end is provided with a gas interface.

[0077] The external powder moving part 702 includes an external powder moving rod and an external mounting groove. The external powder moving rod is connected to the outer bottom surface of the external mounting groove. The external powder moving rod is provided with an external sampling hole along the axial direction, and the external sampling hole is connected to the inside of the external mounting groove; the internal mounting groove is arranged in the external mounting groove. An external elastic block is provided on the inner side wall of the external mounting groove, and an external slot matching the external elastic block is provided on the external carrier 5. The external elastic block is engaged with the external slot to realize the detachable connection between the external carrier 5 and the external powder moving part 702. Of course, in other embodiments, the detachable connection between the external carrier 5 and the external powder moving part 702 can also be other connection methods.

[0078] Along the axis direction of the outer sampling hole, the distance between the outer bottom surface of the inner mounting groove and the inner bottom surface of the outer mounting groove (set as the first distance) is smaller than the distance between the outer carrier 5 and the inner mounting groove (set as the second distance). The outer bottom surface of the inner mounting groove abuts against and pushes the inner bottom of the outer mounting groove, which can cause the outer mounting groove to detach from the outer carrier 5, that is, the outer powder piece 702 detaches from the outer carrier 5. The outer carrier 5 abuts against and pushes the inner mounting groove, which can cause the inner mounting groove to detach from the inner carrier 6, that is, the inner powder piece 701 detaches from the inner carrier 6. Among them, since the first distance is smaller than the second distance, when the outer bottom surface of the inner mounting groove abuts against the inner bottom of the outer mounting groove, the outer powder piece 702 has already detached from the outer carrier 5.

[0079] The solid powder sampler provided in this embodiment has a compact structure of the inner powder moving piece 701 and the outer powder moving piece 702, which can realize single high-precision sampling. The structure of the inner powder moving piece 701 and the outer powder moving piece 702 realizes the combination of rapid sampling and precise sampling.

[0080] Example 2

[0081] See also Figures 1 to 6 This embodiment provides an automatic sampling device for solid powder, including a driving component, a powder transfer head carrier 9, and the solid powder sampler in Example 1.

[0082] The driving assembly is connected to the outer carrier 5 and the inner carrier 6 respectively, and is used to drive the outer carrier 5 and the inner carrier 6 to move and realize relative sliding between the two. Specifically, the driving assembly may include an outer driving part 3 and an inner driving part 4, wherein the output end of the outer driving part 3 is connected to the fixed end of the inner driving part 4 and the outer carrier 5 respectively, and the output end of the inner driving part 4 is connected to the inner carrier 6. More specifically, in this embodiment, Figure 2 The inner driving part 4 includes a fixed block 401, a motor 402 and a movable block 403. The motor 402 is fixedly connected to the fixed block 401. The output end of the motor 402 is connected to a screw rod. The movable rod is connected to the screw rod through a threaded sleeve. The screw rod and the movable block 403 are similar to a lead screw nut, so that the motor 402 drives the movable block 403 to move through the screw rod; the inner carrier 6 is connected to the movable block 403 and driven by the inner driving part 4. The outer carrier 5 is connected to the fixed block 401 and moves with the inner driving part 4.

[0083] The outer powder moving piece 702 is sleeved outside the inner powder moving piece 701, and the outer powder moving piece 702 sleeve and the inner powder moving piece 701 form a powder moving head 7. The powder moving head carrier 9 is provided with a plurality of placement positions for placing unused powder moving heads 7. A plurality of spare powder moving heads 7 can be placed on the powder moving head carrier 9.

[0084] The outer carrier 5 and the inner carrier 6 form a carrier, and the carrier without the powder transfer head 7 connected thereto is connected to the powder transfer head 7 located on the powder transfer head carrier 9 under the drive of the driving assembly. The specific loading method of the carrier (without the powder transfer head 7) and the powder transfer head 7 (on the powder transfer head carrier 9) can be: align the carrier with the powder transfer head 7, and the outer drive part 3 drives the inner drive part 4 and the sampler to move downward, so that the outer carrier 5 contacts the outer powder transfer part 702 (specifically the outer mounting groove), and continues to move downward, so that the outer carrier 5 and the outer powder transfer part 702 are automatically loaded, and the loading at this place includes but is not limited to buckle fastening, interference fit and other methods. After the loading of the outer powder transfer part 702 is completed, the inner drive part drives the inner carrier 6 to move downward, so that the inner carrier 6 contacts the inner powder transfer part 701 (specifically the inner mounting groove), and continues to move downward, so that the inner carrier 6 and the inner powder transfer part 701 are loaded, and the loading at this place includes but is not limited to buckle fastening, interference fit and other methods.

[0085] Example 3

[0086] In the preparation of solid powder 12, manual sampling and weighing are currently used. Because the weighing amount is small and the precision is high, and there are many types of solid powder 12, the labor intensity of personnel is greatly increased, and some solid powder 12 may be harmful to the human body.

[0087] There is a solid powder dispenser on the market, but its application is to distribute different amounts of the same solid powder, and it cannot achieve the weighing of different amounts of multiple solid powders 12. There is also a vibration method for stepwise sampling and weighing, but this method cannot complete the sampling of flocculent solid powders 12 with poor fluidity.

[0088] This embodiment provides an automatic sampling device and method for solid powder, which can be applicable to the sampling and weighing of solid powder 12, the sampling amount is small and the accuracy is high, and the number of solid powder 12 samples is large, and at the same time can solve the problem of cross contamination.

[0089] See also Figures 1 to 7 The automatic sampling device for solid powder provided in this embodiment includes a main frame 1, a solid powder loading component 8, a weighing component 11, a moving component 2, a waste container 10, and the automatic sampling device for solid powder in Example 2.

[0090] The moving assembly 2 is fixedly connected to the main support 1, and the solid powder loading assembly 8, the powder transfer head carrier 9, the waste container 10 and the weighing assembly 11 are all assembled on the main support 1. The solid powder loading assembly 8 is used to load the solid powder 12 to be sampled. The weighing assembly 11 includes a weighing device 1102 and a sample preparation container 1101. The sample preparation container 1101 is used to load the solid powder 12 after sampling, and the sample preparation container 1101 is placed on the weighing device 1102; wherein the weighing device 1102 can be an electronic balance, and the sample preparation container 1101 includes but is not limited to a volumetric flask, a flask, a conical flask and other containers for sample preparation. The waste container 10 is used to store the used powder transfer head 7. The moving assembly 2 is connected to the driving assembly, and is used to drive the sampler to move along the track, and the track passes through the solid powder loading assembly 8, the powder transfer head carrier 9, the waste container 10 and the sample preparation container 1101.

[0091] The solid powder loading assembly 8 includes a solid powder carrier 801 and a powder distributor. The solid powder carrier 801 is loaded with at least one solid powder container 802, and the solid powder container 802 is used to hold the solid powder 12 to be sampled. The powder distributor is connected to the solid powder carrier 801 and is used to drive the solid powder carrier 801 to move (vibrate, move, rotate, etc.), so that the solid powder 12 in the solid powder carrier 801 is evenly distributed at the bottom of the solid powder carrier 801. In this embodiment, the powder distributor can use a vibrator 803, and the vibrator 803 is used to vibrate the solid powder container 802, so as to achieve a uniform distribution of the solid powder 12 in the solid powder container 802.

[0092] Corresponding to the automatic sampling device for solid powder, this embodiment provides an automatic sampling method for solid powder, including:

[0093] S1: transferring part of the solid powder 12 from the solid powder loading assembly 8 to the sample preparation container 1101 through the coarse sampling interval in the sampler, and repeating the transfer process until the weight of the sample preparation container 1101 and the substance therein reaches a first threshold value (the first threshold value is close to the required amount of solid powder 12, which can be set according to specific circumstances);

[0094] S2: detach the external powder piece 702 in the sampler from the external carrier 5;

[0095] S3: Transfer part of the solid powder 12 from the solid powder loading assembly 8 to the sampling container 1101 through the internal sampling hole in the sampler, and repeat the transfer process until the weight of the sampling container 1101 and the material therein reaches a second threshold value (the second threshold value is the final required amount of solid powder 12, and there is an allowable error range in actual circumstances).

[0096] Step S1 may specifically include: moving the sampler to the top of the solid powder container 802 by the moving component 2; for the first sampling, the inner driving part 4 drives the inner carrier 6 (and drives the inner powder moving part 701) to move upward, so that the rough sampling interval obtains a certain known volume, and the outer driving part 3 drives the inner driving part 4 and the sampler to move downward together, so that the outer powder moving head 7 is inserted into the solid powder container 802, and then moves upward, the rough sampling interval will be filled with solid powder 12, realizing a rapid sampling process; then, the moving component 2 drives the automatic sampling device to the top of the sampling container 1101, and the inner carrier 6 pushes the solid powder 12 downward into the sampling container 1101, realizing a rapid sampling process; through the first sampling amount and the known volume of the rough sampling interval during the first sampling, the relationship between the sampling amount and the volume can be calculated, and the volume of the rough sampling interval can be changed by moving the inner powder moving head 7 up and down, so as to change the subsequent sampling amount at will. Sampling is performed multiple times until the sampling is close to the weighing end point (that is, the weight of the sample preparation container 1101 and the material therein reaches the first threshold).

[0097] Step S2 may specifically include: moving the sampler to above the waste container 10 by moving the component 2; the internal driving part 4 drives the inner carrier 6 (and at the same time drives the inner powder piece 701 together) to move downward, the inner powder piece 701 contacts the outer powder piece 702, and the inner carrier 6 continues to move downward, that is, the inner powder piece 701 continues to move downward, pushing the outer powder piece 702 to separate from the outer carrier 5, thereby realizing automatic unloading of the outer powder piece 702.

[0098] Step S3 may specifically include: moving the sampler to above the solid powder container 802 by moving the component 2; the external drive unit 3 drives the internal drive unit 4 and the sampler to move downward together, so that the internal powder moving part 701 is inserted into the solid powder container 802, and then moves upward, there will be a trace amount of solid powder 12 in the internal sampling hole of the internal powder moving part 701, thereby realizing a precise sampling process; then, the mobile component 2 drives the automatic sampling device to above the sampling container 1101, and through the gas interface on the moving inner rod, the gas passes through the inner carrier hole, and then passes through the inside of the inner mounting groove to the inner sampling hole, and blows the trace solid powder 12 into the sampling container 1101, thereby realizing a precise sampling process of the solid powder 12.

[0099] After step S3, step S4 may be performed, and step S4 is to detach the inner powder moving part 701 in the sampler from the inner carrier 6. Step S4 may specifically include: by moving the assembly 2, the sampler is moved above the waste container 10; the inner driving part 4 drives the inner carrier 6 (and drives the inner powder moving part 701 together) to move upward, the inner powder moving part 701 contacts the outer carrier 5, and the inner carrier 6 continues to move upward, that is, drives the inner powder moving part 701 to continue to move upward, and separates the inner powder moving part 701 from the inner carrier 6, thereby realizing automatic unloading of the inner powder moving part 701.

[0100] Before step S1 , step S0 may be performed, which includes: moving the sampler to above the powder transfer head carrier 9 by moving the assembly 2 , and then loading the carrier (without the powder transfer head 7 ) and the powder transfer head 7 (on the powder transfer head carrier 9 ).

[0101] In the automatic sampling device for solid powder provided in this embodiment, a control program can be set to realize automatic sampling and weighing of solid powder 12 in this embodiment. Specifically, the control program realizes: after each rapid sampling and placing, the weighing device 1102 detects whether the weight of the sample preparation container 1101 and the material therein is close to the preset value (i.e., whether it reaches the first threshold value). If it is not close to the preset value, the rapid sampling and placing continues. If it is close to the preset value, it is changed to precise sampling and placing. After each precise sampling and placing, the weighing module detects whether it reaches the preset value (i.e., whether it reaches the second threshold value). If it does not reach the preset value, the precise sampling and placing continues. If it reaches the preset value, the automatic sampling and weighing of solid powder 12 is completed.

[0102] When the sampling accuracy of the solid powder 12 is not required to be high, only the rapid sampling and placing step can be performed, and the precise sampling and placing step can be abandoned. At this time, the automatic sampling method of the solid powder 12 is: a part of the solid powder 12 is transferred from the solid powder loading component 8 to the sample preparation container 1101 through the rough sampling interval in the sampler, and the transfer process is repeated until the weight of the sample preparation container 1101 and the material therein reaches the set value.

[0103] The automatic sampling device and method for solid powder provided in this embodiment have at least the following advantages:

[0104] ① The powder transfer head 7 has a miniaturized structure, which enables single high-precision sampling;

[0105] ② The powder transfer head 7 is automatically controlled to achieve adjustable sampling volume;

[0106] ③ The powder transfer head 7 is designed with an inner powder transfer part 701 and an outer powder transfer part 702 to achieve a combination of rapid sampling and precision sampling;

[0107] ④ The powder transfer head 7 can automatically load and unload, so as to realize the sampling of various solid powder 12 samples and avoid cross contamination;

[0108] ⑤ The automatic sampling equipment can realize automation, and can automatically sample and lay out;

[0109] ⑥ The weighing device 1102 can adopt a high-precision electronic balance to achieve high-precision weighing.

[0110] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A solid powder sampler, characterized in that: include: A fine sampling piece has an inner sampling end, the fine sampling piece is provided with an inner sampling hole, and one end of the inner sampling hole is connected to the outside from the inner sampling end; a gas interface is provided on the fine sampling piece, the gas interface is connected to the inner sampling hole, and is used to connect to an external ventilation device; A coarse sampling member comprises an outer carrier and an outer powder removal member, wherein the outer powder removal member is provided with an outer sampling hole, the fine sampling member partially extends into the outer sampling hole and is slidably connected thereto, and the inner sampling end is located in the outer sampling hole, and the portion of the outer sampling hole that is not slidably connected to the fine sampling member cooperates with the inner sampling end to form a coarse sampling interval; the outer carrier and the outer powder removal member are detachably connected, and the outer carrier and the fine sampling member are slidably connected along the axial direction of the outer sampling hole; Wherein, the fine sampling part comprises an inner carrier and an inner powder moving part, the inner sampling end and the inner sampling hole are arranged on the inner powder moving part, and the inner powder moving part is slidably connected with the outer sampling hole; the inner powder moving part is detachably connected with the inner carrier, and the inner carrier and the outer carrier are slidably connected along the axial direction of the outer sampling hole; the gas interface is arranged on the inner powder moving part or the inner carrier; The inner powder moving part includes an inner powder moving rod and an inner mounting groove, the inner powder moving rod is connected to the outer bottom surface of the inner mounting groove, the inner powder moving rod is axially provided with the inner sampling hole, and the inner sampling hole is connected with the inside of the inner mounting groove; the inner powder moving rod extends into the outer sampling hole and is slidably connected thereto; an inner elastic clamping block is provided on the inner side wall of the inner mounting groove, and an inner clamping groove matching the inner elastic clamping block is provided on the inner carrier, the inner elastic clamping block is clamped with the inner clamping groove to realize the detachable connection between the inner mounting groove and the inner carrier.

2. The solid powder sampler according to claim 1, characterized in that: The inner carrier is provided with an inner carrier hole, one end of the inner carrier hole is communicated with the inner mounting groove, and the other end of the inner carrier hole is provided with the gas interface.

3. The solid powder sampler according to claim 1, characterized in that: The outer powder moving member comprises an outer powder moving rod and an outer mounting groove, the outer powder moving rod is connected to the outer bottom surface of the outer mounting groove, the outer powder moving rod is provided with the outer sampling hole along the axial direction, and the outer sampling hole is connected with the inner part of the outer mounting groove; the inner mounting groove is arranged in the outer mounting groove; An outer elastic block is provided on the inner side wall of the outer mounting groove, and an outer slot matching the outer elastic block is provided on the outer carrier. The outer elastic block is engaged with the outer slot to realize a detachable connection between the outer carrier and the outer powder moving member.

4. An automatic sampling device for solid powder, characterized in that: A sampler for solid powder comprising a driving component and the solid powder sampler as claimed in any one of claims 1 to 2, wherein the driving component is respectively connected to the fine sampling component and the external carrier, and is used to respectively drive the fine sampling component and the external carrier to move, so as to enable the fine sampling component to slide in the external sampling hole.

5. An automatic sampling device for solid powder, characterized in that: A solid powder sampler comprising a driving component, a powder transfer head carrier, and the solid powder sampler according to claim 3, wherein the driving component is connected to the outer carrier and the inner carrier respectively, and is used to drive the outer carrier and the inner carrier to move respectively to achieve relative sliding between the two; The outer powder moving piece sleeve is arranged outside the inner powder moving piece, and the outer powder moving piece sleeve and the inner powder moving piece form a powder moving head; the powder moving head carrier is provided with a plurality of placement positions, and the placement positions are used to place the unused powder moving heads; The outer carrier and the inner carrier constitute a carrier, and the carrier not connected with the powder transfer head is connected with the powder transfer head located on the powder transfer head carrier under the drive of the driving component.

6. The automatic sampling device for solid powder according to claim 5, characterized in that: The driving assembly includes an external driving part and an internal driving part. The output end of the external driving part is respectively connected to the fixed end of the internal driving part and the external carrier, and the output end of the internal driving part is connected to the internal carrier.

7. An automatic sampling device for solid powder, characterized in that: include: The automatic sampling device according to claim 5 or 6; A solid powder loading component, used for loading solid powder to be sampled; A weighing assembly, comprising a weighing device and a sample preparation container, wherein the sample preparation container is used to load the solid powder after sampling, and the sample preparation container is placed on the weighing device; The moving component is connected to the driving component and is used to drive the sampler to move along a track, and the track passes through the solid powder loading component, the powder transfer head carrier and the sample preparation container.

8. The automatic sampling device for solid powder according to claim 7, characterized in that: The solid powder loading assembly includes a solid powder carrier and a powder mixer; The solid powder carrier is loaded with at least one solid powder container, and the solid powder container is used to hold the solid powder to be sampled; The powder distributor is connected to the solid powder carrier and is used to drive the solid powder carrier to move so that the solid powder in the solid powder carrier is evenly distributed at the bottom of the solid powder carrier.

9. The automatic sampling device for solid powder according to claim 7, characterized in that: Also included is a waste container, which is used to store the used powder transfer head.

10. The automatic sampling device for solid powder according to claim 9, characterized in that: It also includes a main body bracket, the moving component is fixedly connected to the main body bracket, and the solid powder loading component, the powder transfer head carrier, the waste container and the weighing component are all assembled on the main body bracket.

11. A method for sampling solid powder, characterized in that: A sampler suitable for solid powder as claimed in claim 1, comprising a rapid sampling and setting out step, an unloading and externally moving powder step and a precise sampling and setting out step; The fast sampling and setting out step includes a fast sampling step and a fast setting out step located after the fast sampling step; The rapid sampling step: the rough sampling interval extends into the solid powder pile to be sampled, and then leaves the solid powder pile to be sampled to obtain part of the solid powder; The rapid sampling step: the fine sampling member slides in the outer sampling hole to reduce the volume of the rough sampling interval, and the fine sampling member pushes the solid powder away from the rough sampling interval; The step of unloading the externally moved powder pieces: removing the externally moved powder pieces from the external carrier; The precise sampling and lofting comprises a precise sampling step and a precise lofting step after the precise sampling step; The precise sampling step: the precise sampling member extends into the solid powder pile to be sampled, and obtains part of the solid powder in the inner sampling hole; The precise sampling step includes: ventilating the inner sampling hole from the gas interface, and the gas blows the solid powder away from the inner sampling hole.

12. A method for automatic sampling of solid powder, characterized in that: The automatic sampling device for solid powder according to claim 7, wherein the solid powder loading assembly is loaded with solid powder to be sampled, and the automatic sampling method comprises: S1: transferring part of the solid powder from the solid powder loading assembly to the sampling container through the rough sampling interval in the sampler, and repeating the transfer process until the weight of the sampling container and the substance therein reaches a first threshold; S2: detaching the external powder removal part in the sampler from the external carrier; S3: transferring part of the solid powder from the solid powder loading assembly to the sampling container through the inner sampling hole in the sampler, and repeating the transfer process until the weight of the sampling container and the substance therein reaches a second threshold.

13. A method for automatic sampling of solid powder, characterized in that: The automatic sampling device for solid powder according to claim 7, wherein the solid powder loading assembly is loaded with solid powder to be sampled, and the automatic sampling method comprises: A portion of the solid powder is transferred from the solid powder loading assembly to the sampling container through the coarse sampling interval in the sampler, and the transfer process is repeated until the weight of the sampling container and the material therein reaches a set value.

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