Automatic solid powder sample adding instrument matched with electronic balance

Abstract

The invention provides an automatic solid powder sample adding instrument matched with an electronic balance. The automatic solid powder sample adding instrument comprises a bracket bottom plate; a lifting mechanism, a driving assembly, a powder barrel and a control system, the lifting mechanism is arranged on the support bottom plate, a cross beam is arranged on the lifting mechanism, and the lifting mechanism can drive the cross beam to ascend and descend; the driving assembly is arranged on the cross beam and can move up and down along with the cross beam; the driving assembly is detachably connected with the powder barrel and can drive the powder barrel to discharge; the control system is a multi-stage variable speed control system, the control system is electrically connected with the lifting mechanism to control the lifting mechanism to ascend and descend, and the control system is connected with the driving assembly to control discharging of the powder barrel. According to the automatic solid powder sample adding instrument, nondestructive installation and automatic use of the balance can be achieved, the sample adding efficiency and the sample adding precision can be considered at the same time through a multi-stage speed change control system, and therefore the structure can complete the weighing task from the sub-milligram level to the gram level.

Description

Technical Field

[0001] The present invention relates to the field of solid sample addition, and more specifically, to an automated solid powder sample addition instrument adapted to an electronic balance. Background Art

[0002] In the fields of drug research and development, high-throughput screening, analysis and identification, materials science, and catalyst research, etc., there are usually requirements for micro liquid and solid sample addition. High-precision liquid and powder quantitative sample addition instruments are used to automatically and accurately dispense trace amounts of liquid and powder solid raw materials in experiments. Such technologies can improve the accuracy and repeatability of sample addition, save experimental time and costs, and reduce the risks of human error and contamination.

[0003] However, from a technical perspective, generally, liquids have fluidity and uniformity, and can be precisely transferred through methods such as positive displacement, air displacement, capillary action, ultrasonic fragmentation, etc., and there are already many mature liquid handling workstations and instruments. While solid powders usually have different forms and properties, and generally have no fluidity and uniformity, so it is more difficult to achieve solid transfer, especially micro-precise transfer. In the prior art, micro-precise transfer of solids cannot be achieved.

[0004] Moreover, in the prior art, it is impossible to clearly understand the name information, usage times, usage amount, remaining amount, etc. of the drugs in the medicine barrel, which brings trouble to the use. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems in the related technologies to some extent. For this reason, the present invention provides an automated solid powder sample addition instrument adapted to an electronic balance, including:

[0006] A support base plate;

[0007] A lifting mechanism, the lifting mechanism is arranged on the support base plate, a cross beam is arranged on the lifting mechanism, and the lifting mechanism can drive the cross beam to rise and fall;

[0008] A driving component, the driving component is arranged on the cross beam and can move up and down with the cross beam;

[0009] A powder barrel, the driving component is detachably connected to the powder barrel and can drive the powder barrel to discharge materials; and

[0010] A control system, the control system is a multi-stage variable speed control system, the control system is electrically connected to the lifting mechanism to control the lifting mechanism to rise and fall, and the control system is connected to the driving component to control the powder barrel to discharge materials.

[0011] The automated solid powder sampler adapted to the electronic balance in this embodiment adopts a horizontally placed support structure and a lifting design, can communicate with the universal external data interface of the balance, can achieve non-destructive installation and automated use form of the balance, is an innovation for the first time in terms of structural form, and has a wider application range; moreover, the control system adopts a multi-stage variable speed control system, which can take into account both the sampling efficiency and the sampling accuracy, so that this structure can complete the weighing tasks from sub-milligram level to gram level.

[0012] Optionally, the powder bucket includes a bucket body, a cover body, a pushing rod and a first gear;

[0013] The cover body is covered on the bucket body, the pushing rod is arranged in the bucket body, the first gear is arranged on the cover body and is connected to the upper end of the pushing rod, and the driving component is in transmission connection with the first gear;

[0014] The lower end of the pushing rod has a threaded structure, and the threaded structure is at least located at the discharge port of the bucket body.

[0015] Optionally, a stirring frame is arranged on the pushing rod; the lower end of the bucket body has an extension part, the extension part has a discharge channel leading to the discharge port of the bucket body, the threaded structure is at least located in the discharge channel, and the diameter of the threaded structure is equal to the inner diameter of the discharge channel.

[0016] Optionally, the end of the threaded structure is semicircular, and the discharge port of the bucket body is rectangular; a feeding port is communicated with the side part of the bucket body.

[0017] Optionally, the end of the threaded structure is a plurality of sector blocks circumferentially spaced apart, the threaded structure includes a plurality of threads, the discharge port of the bucket body includes a plurality of sector openings circumferentially spaced apart, and the plurality of sector blocks correspond to the plurality of sector openings one by one.

[0018] Optionally, the powder bucket further includes a first bearing and a second bearing, the first bearing is arranged on the cover body, the first gear is matched with the first bearing, the second bearing is arranged on the bucket body, and the pushing rod is matched with the second bearing; a plurality of sensing components are arranged on the first gear, and the plurality of sensing components are arranged in a circumferential array on the first gear. A photoelectric switch is arranged on one side of the first gear, and the photoelectric switch can detect the rotation angle of the first gear by sensing the sensing components, and the photoelectric switch is electrically connected to the control system.

[0019] Optionally, the driving component includes a support plate, a first motor and a second gear;

[0020] The support plate is disposed on the cross beam, the first motor is disposed on the support plate, the second gear is disposed on the output shaft of the first motor, and the second gear meshes with the first gear;

[0021] The support plate is provided with a groove with a first magnet built therein, the barrel body is provided with a second magnet, the first magnet and the second magnet attract each other, and the barrel body is adapted to the groove.

[0022] Optionally, the driving assembly further includes a second motor, a rotating rod and a baffle. The control system is electrically connected to the second motor. The second motor is disposed on the support plate. The control system is electrically connected to the second motor. The rotating rod is connected to the output shaft of the second motor. The rotating rod is connected to the baffle. The baffle can close or open the discharge port of the barrel body under the drive of the second motor. A pressure-sensitive component and an automatic laser device are disposed on the baffle. The automatic laser device is used to locate the center of the powder barrel. The control system is electrically connected to the pressure-sensitive component. The first motor and / or the second motor is a closed-loop drive motor.

[0023] Optionally, a magnetic code or an electronic tag is disposed on the powder barrel, and an identifier capable of reading the magnetic code or the electronic tag is disposed on the driving assembly. The identifier identifies the name information, the number of uses, the used amount and the remaining amount of the drug in the powder barrel by reading the magnetic code or the electronic tag. The identifier is a radio frequency identifier or a bar code identifier.

[0024] Optionally, the lifting mechanism includes a third motor, a first pulley, a second pulley, a synchronous belt, a coupling, a connecting block and a vertical shaft;

[0025] The third motor is a brake-equipped stepper motor. The third motor is disposed on the support plate of the bracket. The output shaft of the third motor is connected to the coupling. The coupling is connected to the first pulley. The first pulley and the second pulley are connected by the synchronous belt. The connecting block is disposed on the synchronous belt. The vertical shaft is fixed to the connecting block. The cross beam is connected to the top end of the vertical shaft.

[0026] Optionally, a support plate is disposed on the support plate of the bracket, and the control system is disposed on the support plate;

[0027] The automated solid powder sampling instrument adapted to the electronic balance further includes a radar device for measuring the height of the powder barrel;

[0028] The multi-stage speed control system calculates n node quantities from the set value to the target value, thereby obtaining n + 1 intervals. By reading the response value of the balance in real time and determining the interval it is in, and using the interval where the real-time response value is located as the judgment criterion, the rotation speed of the drive component is controlled to decrease step by step; within each interval, the powder output speed is monitored at a preset time interval, and the rotation speed is adjusted adaptively.

[0029] Optionally, the automated solid powder sampler adapted to the electronic balance further includes a wireless control module, and the wireless control module communicates wirelessly with the control system to control the control system through the wireless control module. The wireless communication methods include Bluetooth communication and Wi-Fi communication.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the invention. Brief Description of the Drawings

[0031] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0032] Figure 1 is a schematic diagram of an automated solid powder sampler adapted to an electronic balance and the balance in an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of an automated solid powder sampler adapted to an electronic balance in an embodiment of the present invention;

[0034] Figure 3 is a front view of an automated solid powder sampler adapted to an electronic balance in an embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of a drive component and a powder bucket in an embodiment of the present invention;

[0036] Figure 5 is a schematic diagram of a powder bucket in an embodiment of the present invention;

[0037] Figure 6 is a cross-sectional view of a powder bucket in an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram of a barrel body in an embodiment of the present invention;

[0039] Figure 8 is a bottom view of a barrel body in an embodiment of the present invention;

[0040] Figure 9 is a bottom view of a powder bucket in an embodiment of the present invention;

[0041] Figure 10 It is a partial schematic view of a pusher rod in an embodiment of the present invention;

[0042] Figure 11 It is a partial schematic view of a pusher rod in another embodiment of the present invention.

[0043] Reference numerals:

[0044] 1 - Balance;

[0045] 10 - Bracket base plate; 11 - Support plate;

[0046] 20 - Lifting mechanism; 21 - Third motor; 22 - First pulley; 23 - Second pulley; 24 - Synchronous belt; 25 - Coupling; 26 - Connecting block; 27 - Vertical shaft; 201 - Cross beam;

[0047] 30 - Driving assembly; 31 - Support plate; 32 - First motor; 33 - Second gear; 34 - Second motor; 35 - Rotating rod; 36 - Baffle;

[0048] 40 - Powder bucket; 41 - Bucket body; 411 - Extension part; 412 - Feeding port; 42 - Cover body; 43 - Pusher rod; 431 - Thread structure; 432 - Stirring frame; 44 - First gear; 45 - First bearing; 46 - Second bearing;

[0049] 50 - Control system. Detailed implementation manners

[0050] The technical solutions of the present invention will be further described in detail below in combination with specific embodiments. It should be understood that the following embodiments are only used to illustrate and explain the present invention exemplarily, and should not be construed as limiting the protection scope of the present invention. All technologies implemented based on the above content of the present invention are covered within the scope of protection intended by the present invention.

[0051] This embodiment provides an automated solid powder sampling instrument adapted to an electronic balance, which can be used in cooperation with an existing electronic balance 1 through a general data interface.

[0052] Refer to Figures 1 - 3The automated solid powder dispenser adapted to the electronic balance comprises: a support base plate 10, a lifting mechanism 20, a driving assembly 30, a powder barrel 40 and a control system 50. The lifting mechanism 20 is arranged on the support base plate 10, and a crossbeam 201 is arranged on the lifting mechanism 20, and the lifting mechanism 20 can drive the crossbeam 201 to rise and fall; the driving assembly 30 is arranged on the crossbeam 201 and can move up and down with the crossbeam 201; the driving assembly 30 is detachably connected to the powder barrel 40 and can drive the powder barrel 40 to discharge materials; the control system 50 is a multi-stage speed control system, the control system 50 is electrically connected to the lifting mechanism 20 to control the lifting and lowering of the lifting mechanism 20, and the control system 50 is connected to the driving assembly 30 to control the discharge of the powder barrel 40.

[0053] The automatic solid powder loading instrument adapted to the electronic balance of the above embodiment controls the lifting mechanism 20 through the control system 50, so that the lifting mechanism 20 drives the crossbeam 201 to rise and fall to the specified position, and then drives the powder barrel 40 to discharge the material through the driving component 30, thereby realizing automatic loading of the powder barrel 40, and the control system 50 is a multi-stage variable speed control system, which first controls the solid powder to be discharged quickly during loading, and when it approaches the preset weight, slows down the loading speed, thereby improving the loading accuracy. The use of a multi-stage variable speed control system can take into account both loading efficiency and loading accuracy, so that the loading instrument can complete weighing tasks from sub-milligram level to gram level.

[0054] The control system 50 adopts an adaptive multi-stage speed change method to calculate multiple (if n) node quantities from the target value according to the set quantity, thereby obtaining n+1 intervals, and reading the response value of the balance 1 in real time and judging the interval it is in. The interval where the real-time response value is located is used as the judgment standard to control the speed to be reduced step by step. In each interval, the powder output speed is monitored at a preset time interval, and the speed is adaptively adjusted to make the powder output speed close to the average rate, thereby ensuring the feeding efficiency of powders of different densities, so that both the feeding efficiency and the feeding accuracy can be taken into account at the same time, so that powders of different densities can reach the same set feeding rate.

[0055] In some embodiments, the automated solid powder sampler adapted to the electronic balance further includes a wireless control module, which wirelessly communicates with the control system 50 to control the control system 50 through the wireless control module, and the wireless communication method includes Bluetooth communication and wifi communication. The wireless control module can coordinate the control system 50 to remotely control the instrument at an appropriate distance, and the use of the wireless control module can greatly facilitate the operator to perform micro-weighing and multiple weighing in the glove box.

[0056] In some embodiments, see Figure 5 and Figure 6, the powder bucket 40 includes a bucket body 41, a cover body 42, a pushing rod 43, and a first gear 44; the cover body 42 is covered on the bucket body 41, the pushing rod 43 is arranged inside the bucket body 41, the first gear 44 is arranged on the cover body 42 and is connected to the upper end of the pushing rod 43; the lower end of the pushing rod 43 has a threaded structure 431, and the threaded structure 431 is at least located at the discharge port of the bucket body 41. The driving assembly 30 is in transmission connection with the first gear 44 to drive the first gear 44 to rotate, and the first gear 44 drives the pushing rod 43 to rotate. Since the lower end of the pushing rod 43 has a threaded structure 431, therefore, as the pushing rod 43 rotates, the powder will be pushed out of the discharge port. By designing the shape, pitch, number of threads of the thread of the threaded structure 431 and controlling the rotation speed, etc., the precise dispensing requirements of solid powder from sub-milligram level to gram level can be achieved.

[0057] In some embodiments, a stirring frame 432 is arranged on the pushing rod 43; the stirring frame 432 rotates with the pushing rod 43 and can loosen the powder in the bucket body 41. The lower end of the bucket body 41 has an extension part 411, and the extension part 411 has a discharge channel leading to the discharge port of the bucket body 41, and the threaded structure 431 is at least located in the discharge channel.

[0058] Furthermore, the diameter of the threaded structure 431 is equal to the inner diameter of the discharge channel, so that the powder can only be conveyed downward through the threaded structure 431, improving the accuracy of powder dispensing.

[0059] In some embodiments, a plurality of sensing components are arranged on the first gear 44, and the plurality of sensing components are distributed in a circumferential array on the first gear 44. A photoelectric switch is arranged on one side of the first gear 44. The photoelectric switch can detect the rotation angle of the first gear 44 by sensing the sensing components, and the photoelectric switch is electrically connected to the control system 50. By arranging the sensing components and the photoelectric switch, the rotation angle of the first gear 44 can be accurately judged, so as to more precisely control the powder output.

[0060] In some embodiments, refer to Figure 10 , the end of the threaded structure 431 is semicircular, refer to Figure 9 , the discharge port of the bucket body 41 is rectangular, and the cooperation between the threaded structure 431 with a semicircular end and the rectangular discharge port can realize the continuous discharge normal opening form during the sample addition process.

[0061] In some embodiments, refer to Figure 11 , the end of the threaded structure 431 is a plurality of sector blocks distributed at circumferential intervals, refer to Figure 8 , the discharge port of the bucket body 41 includes a plurality of sector openings distributed at circumferential intervals, and the plurality of sector blocks correspond to the plurality of sector openings one by one. The threaded structure 431 includes a plurality of threads; by arranging a plurality of threads, the powder can flow along the plurality of threads to avoid material accumulation.

[0062] In some embodiments, referring to Figure 7 , a feeding port 412 is connected to the side of the barrel body 41, so that solid powder can be added into the barrel body 41 through the feeding port 412.

[0063] In some embodiments, referring to Figure 6 , the powder barrel 40 further includes a first bearing 45 and a second bearing 46. The first bearing 45 is arranged on the cover body 42, the first gear 44 is matched with the first bearing 45, the second bearing 46 is arranged on the barrel body 41, and the pushing rod 43 is matched with the second bearing 46. By arranging the first bearing 45 and the second bearing 46, the rotation stability of the pushing rod 43 is improved, thereby improving the accuracy of powder distribution.

[0064] In some embodiments, referring to Figure 4 , the driving assembly 30 includes a support plate 31, a first motor 32 and a second gear 33; the support plate 31 is arranged on the cross beam 201 and can move synchronously with the cross beam 201, the first motor 32 is arranged on the support plate 31, the second gear 33 is arranged on the output shaft of the first motor 32, and the second gear 33 meshes with the first gear 44; thus, the second gear 33 is driven to rotate by the first motor 32, the first gear 44 is driven to rotate by the second gear 33, and the pushing rod 43 is driven to rotate by the first gear 44.

[0065] Furthermore, the support plate 31 is provided with a groove with a built-in first magnet, and a second magnet is arranged on the barrel body 41. The first magnet and the second magnet attract each other, and the barrel body 41 is adapted to the groove; thus, the quick connection between the powder barrel 40 and the driving assembly 30 is realized. Among them, the first motor 32 is a closed-loop driving motor, so that the rotation angle can be accurately controlled, and the accuracy of powder distribution is improved.

[0066] In some embodiments, the driving assembly 30 further includes a second motor 34, a rotating rod 35 and a baffle 36. The second motor 34 is arranged on the support plate 31, the control system 50 is electrically connected to the second motor 34, the rotating rod 35 is connected to the output shaft of the second motor 34, the rotating rod 35 is connected to the baffle 36, and the baffle 36 can close or open the discharge port of the barrel body 41 under the drive of the second motor 34; the control system 50 is electrically connected to the second motor 34, so as to control the second motor 34 to drive the rotating rod 35 and the baffle 36 to rotate, so as to close or open the discharge port of the barrel body 41 when necessary. The baffle 36 can effectively prevent accidental material discharge.

[0067] Among them, the second motor 34 is a closed-loop driving motor, so that the rotation angle can be controlled more accurately, so as to accurately close the discharge port of the barrel body 41.

[0068] Preferably, a pressure-sensitive component is provided on the baffle 36, and the control system 50 is electrically connected to the pressure-sensitive component; the pressure-sensitive component can prevent the powder barrel 40 from dropping too low, thereby damaging the scale 1. Specifically, when the pressure-sensitive component contacts the scale 1, a pressure signal is transmitted to the control system 50, and the control system 50 controls the third motor 21 to rotate in the opposite direction to move the powder barrel 40 upward, thereby avoiding damage to the scale 1.

[0069] Preferably, the baffle 36 is provided with an automatic laser device, which is used to locate the center of the powder barrel 40. The automatic laser device is electrically connected to the control system 50. When the baffle 36 closes the discharge port of the barrel body 41, the laser center of the automatic laser device coincides with the discharge port center of the barrel body 41, and the center of the sample bottle on the balance is located by the automatic laser device. When the baffle 36 opens the discharge port of the barrel body 41, the automatic laser device is automatically closed.

[0070] Furthermore, a magnetic code or an electronic tag is provided on the powder barrel 40, and an identifier capable of reading the magnetic code or the electronic tag is provided on the driving assembly 30, and the identifier identifies the name information, the number of times used, the used amount, and the remaining amount of the medicine in the powder barrel 40 by reading the magnetic code or the electronic tag. The identifier may be a radio frequency identifier or a barcode identifier.

[0071] In some embodiments, the lifting mechanism 20 includes a third motor 21, a first pulley 22, a second pulley 23, a synchronous belt 24, a coupling 25, a connecting block 26 and a vertical shaft 27; the third motor 21 is a stepping motor with a brake, and the third motor 21 is arranged on the bracket base plate 10, and the output shaft of the third motor 21 is connected to the coupling 25, and the coupling 25 is connected to the first pulley 22, and the first pulley 22 and the second pulley 23 are connected through the synchronous belt 24, and a connecting block 26 is arranged on the synchronous belt 24, and the vertical shaft 27 is fixed to the connecting block 26, and the crossbeam 201 is connected to the top of the vertical shaft 27.

[0072] Specifically, the control system 50 controls the third motor 21 to rotate, the third motor 21 drives the first pulley 22 to rotate, the first pulley 22 drives the second pulley 23 to rotate through the synchronous belt 24, the connecting block 26 moves up and down synchronously with the synchronous belt 24, the connecting block 26 drives the vertical shaft 27 to move up and down, and the vertical shaft 27 drives the crossbeam 201 to move up and down.

[0073] In some embodiments, a support plate 11 is disposed on the support bottom plate 10, and the control system 50 is disposed on the support plate 11. The automatic solid powder loading instrument adapted to the electronic balance further includes a radar device, which is used to measure the height of the powder barrel 40.

[0074] In summary, the automated solid powder sampler adapted to the electronic balance in this embodiment adopts a horizontally placed bracket structure and a lifting design. It can communicate through the common RS232 external data interface of the balance, enabling non-destructive installation and automated use of the balance. This is an innovative design in terms of structural form and has a wider application range. The use of a stirring rack and a threaded structure to push the powder can effectively solve the problem of material blockage. At the same time, the combination of a rectangular discharge port and the end of a semi-circular threaded structure realizes a continuously discharging normal opening form during the feeding process, achieving more precise discharge control than the reported micro solid feeding structures. The control method is only a rotation mode, eliminating the up and down movement, thus avoiding the problem of no powder discharge or out-of-control powder discharge caused by the failure of the elastic structure performance. The use of an automatic laser device and a radar device can effectively locate the discharge center and the height of the powder bucket. The pressure-sensitive component serves as a second layer of protection to prevent damage to the balance due to the too low height of the discharge component; at the same time, the automatic baffle can effectively prevent accidental powder discharge. In addition, a multi-stage variable speed control system can take into account both the sampling efficiency and the sampling accuracy, enabling this structure to complete weighing tasks from sub-milligram level to gram level. By setting magnetic encoding on the powder bucket, the identification of the name information, usage times, used amount, and remaining amount of the drug in the powder bucket can be realized, thus improving the convenience of use.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0076] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0077] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0079] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated solid powder sampler adapted to an electronic balance, characterized in that Comprising: A support base plate (10); A lifting mechanism (20), the lifting mechanism (20) is arranged on the support base plate (10), a cross beam (201) is arranged on the lifting mechanism (20), and the lifting mechanism (20) can drive the cross beam (201) to lift; A driving assembly (30), the driving assembly (30) is arranged on the cross beam (201) and can move up and down with the cross beam (201); A powder bucket (40), the driving assembly (30) is detachably connected to the powder bucket (40) and can drive the powder bucket (40) to discharge materials; And A control system (50), the control system (50) is a multi-stage speed control system, the control system (50) is electrically connected to the lifting mechanism (20) to control the lifting of the lifting mechanism (20), and the control system (50) is connected to the driving assembly (30) to control the discharging of the powder bucket (40).

2. The automated solid powder sampling instrument adapted to an electronic balance according to claim 1, characterized in that The powder bucket (40) includes a bucket body (41), a cover body (42), a pushing rod (43) and a first gear (44); The cover body (42) covers the bucket body (41), the pushing rod (43) is arranged in the bucket body (41), the first gear (44) is arranged on the cover body (42) and is connected to the upper end of the pushing rod (43), and the driving assembly (30) is in transmission connection with the first gear (44); The lower end of the pushing rod (43) has a threaded structure (431), and the threaded structure (431) is at least located at the discharge port of the bucket body (41).

3. The automated solid powder sampling instrument adapted to an electronic balance according to claim 2, wherein, A stirring frame (432) is arranged on the pushing rod (43); the lower end of the bucket body (41) has an extension part (411), the extension part (411) has a discharge channel leading to the discharge port of the bucket body (41), the threaded structure (431) is at least located in the discharge channel, and the diameter of the threaded structure (431) is equal to the inner diameter of the discharge channel.

4. The automated solid powder sampler adapted to an electronic balance according to claim 3, characterized in that, The end of the threaded structure (431) is semi-circular, and the discharge port of the bucket body (41) is rectangular; a feeding port (412) is communicated with the side part of the bucket body (41).

5. The automated solid powder sampling instrument adapted to an electronic balance according to claim 3, characterized in that, The end of the threaded structure (431) is a plurality of sector blocks circumferentially spaced apart, the threaded structure (431) includes a plurality of threads, the discharge port of the bucket body (41) includes a plurality of sector openings circumferentially spaced apart, and the plurality of sector blocks correspond to the plurality of sector openings one by one.

6. The automated solid powder sampler adapted to an electronic balance according to any one of claims 2-5, characterized in that, The powder bucket (40) further includes a first bearing (45) and a second bearing (46), the first bearing (45) is arranged on the cover body (42), the first gear (44) is matched with the first bearing (45), the second bearing (46) is arranged on the bucket body (41), and the pushing rod (43) is matched with the second bearing (46); A plurality of induction components are arranged on the first gear (44), and the plurality of induction components are arranged in a circumferential array on the first gear (44). A photoelectric switch is arranged on one side of the first gear (44). The photoelectric switch can detect the rotation angle of the first gear (44) by sensing the induction components, and the photoelectric switch is electrically connected to the control system (50).

7. The automated solid powder sampler adapted to an electronic balance according to claim 2, characterized in that, The drive assembly (30) includes a support plate (31), a first motor (32) and a second gear (33); The support plate (31) is arranged on the cross beam (201), the first motor (32) is arranged on the support plate (31), the second gear (33) is arranged on the output shaft of the first motor (32), and the second gear (33) meshes with the first gear (44); The support plate (31) is provided with a groove with a first magnet built in, and a second magnet is arranged on the barrel body (41). The first magnet and the second magnet attract each other, and the barrel body (41) is adapted to the groove.

8. The automated solid powder sampling instrument adapted to an electronic balance according to claim 7, wherein, The drive assembly (30) further includes a second motor (34), a rotating rod (35) and a baffle (36). The control system (50) is electrically connected to the second motor (34). The second motor (34) is arranged on the support plate (31). The control system (50) is electrically connected to the second motor (34). The rotating rod (35) is connected to the output shaft of the second motor (34), and the rotating rod (35) is connected to the baffle (36). The baffle (36) can close or open the discharge port of the barrel body (41) under the drive of the second motor (34); A pressure-sensitive component and an automatic laser device are arranged on the baffle (36). Both the pressure-sensitive component and the automatic laser device are electrically connected to the control system (50). The automatic laser device is used to locate the center of the powder barrel (40), and the control system (50) is electrically connected to the pressure-sensitive component; The first motor (32) and / or the second motor (34) is a closed-loop drive motor; A magnetic code or an electronic tag is arranged on the powder barrel (40), and an identifier capable of reading the magnetic code or the electronic tag is arranged on the drive assembly (30). The identifier identifies the name information, the number of uses, the used amount and the remaining amount of the drug in the powder barrel (40) by reading the magnetic code or the electronic tag. The identifier is a radio frequency identifier or a barcode identifier.

9. The automated solid powder sampler adapted to an electronic balance according to claim 1, characterized in that The lifting mechanism (20) includes a third motor (21), a first pulley (22), a second pulley (23), a synchronous belt (24), a coupling (25), a connecting block (26) and a vertical shaft (27); The third motor (21) is a brake-equipped stepper motor. The third motor (21) is arranged on the support base plate (10). The output shaft of the third motor (21) is connected to the coupling (25). The coupling (25) is connected to the first pulley (22). The first pulley (22) and the second pulley (23) are drivingly connected by the timing belt (24). The connecting block (26) is arranged on the timing belt (24). The vertical shaft (27) is fixed to the connecting block (26). The cross beam (201) is connected to the top of the vertical shaft (27).

10. The automated solid powder sampler adapted to an electronic balance according to claim 2, characterized in that A support plate (11) is arranged on the support base plate (10). The control system (50) is arranged on the support plate (11). The automatic solid powder sampling instrument adapted to the electronic balance further includes a radar device. The radar device is used to measure the height of the powder bucket (40). The multi-stage speed control system calculates n node quantities from the set quantity to the target value, thereby obtaining n + 1 intervals. By real-time reading the response value of the balance and judging the interval where it is located, and taking the interval where the real-time response value is located as the judgment criterion, the rotation speed of the driving component (30) is controlled to gradually decrease; within each interval, the powder discharging speed is monitored at a preset time interval, and the rotation speed of the pushing rod (43) is adaptively adjusted. The automatic solid powder sampling instrument adapted to the electronic balance further includes a wireless control module. The wireless control module communicates with the control system (50) wirelessly to control the control system (50) through the wireless control module. The wireless communication methods include Bluetooth communication and wifi communication.

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