Solid powder automatic quantitative adding device

Abstract

The application belongs to the technical field of powder processing, and discloses a solid powder automatic quantitative adding device, which comprises a control box, a sample adding mechanism, a weighing base arranged below the sample adding mechanism and a sample adding head replaceably mounted on the sample adding mechanism. In work, the sample adding mechanism drives the sample adding head to add solid powder into a container placed on the weighing base according to the instruction of the control box, and a weighing sensor in the weighing base monitors the weight in real time to realize accurate quantification. The application forms a closed sample adding environment by arranging a wind shield, realizes double damping by using a weighing sensor damping seat and a sample adding mechanism damping seat, effectively isolates environmental airflow and internal and external vibration interference, and realizes full-automatic and high-precision quantitative addition of various powders by replacing the sample adding head with an identification label, thereby improving the efficiency, accuracy and safety of sample adding work.

Description

Technical Field

[0001] This invention belongs to the field of powder processing technology, and specifically relates to an automated quantitative addition device for solid powder. Background Technology

[0002] Weighing solid powders is a core and fundamental step in testing and inspection work such as chemical analysis, drug development, and materials science. This operation is not only crucial to the accuracy of experimental results but also occurs frequently in daily work. However, solid reagents are characterized by their wide variety and diverse physical forms (such as crystalline, amorphous, and fibrous), and they generally suffer from problems such as easy compression, adhesion, adsorption, and moisture absorption, making precise dispensing extremely difficult.

[0003] Traditional manual weighing methods have many drawbacks: the process is cumbersome, time-consuming, and prone to errors, especially when weighing trace amounts of sample, where even slight shaking or breathing by the operator can lead to significant errors. Furthermore, once the target weight is exceeded, the excess powder is usually difficult to recover, resulting in unavoidable waste. For certain toxic, corrosive, or irritating solid powders, manual weighing also poses serious safety hazards to workers.

[0004] Therefore, automating solid powder weighing is an effective way to improve safety, efficiency, cost control, and result accuracy. Currently, most commercially available automated solid powder feeding devices are designed for the manufacturing industry, characterized by large feeding volumes, typically in the gram (g), kilogram (kg), or even ton (t) range, but with correspondingly lower precision, usually in the gram (g) range. This cannot meet the requirements of the testing and inspection field for high-precision sample loading at the milligram (mg) or even microgram (μg) level. Summary of the Invention

[0005] The present invention aims to at least partially solve the aforementioned technical problems. Therefore, the objective of the present invention is to provide an automated quantitative addition device for solid powders.

[0006] The technical solution adopted in this invention is as follows:

[0007] An automated quantitative addition device for solid powder includes: a control box; a sample addition mechanism electrically connected to the control box; a weighing base disposed below the sample addition mechanism; and a sample addition head detachably mounted on the sample addition mechanism for containing solid powder. The sample addition mechanism drives the sample addition head to perform a feeding action, adding solid powder from the sample addition head into a container placed on the weighing base. The weighing base has a built-in weighing sensor for real-time measurement of the weight of the solid powder in the container and feeding the weight data back to the control box to control the sample addition process.

[0008] Furthermore, the sample dispensing mechanism includes: an overall lifting mechanism for driving the entire sample dispensing mechanism to move up and down; a feeding mechanism installed on the overall lifting mechanism for driving the sample dispensing head to perform specific feeding or stopping actions; and a windproof cover connected to the overall lifting mechanism for covering the lower end of the sample dispensing head and the container during sample dispensing to form a relatively sealed sample dispensing environment.

[0009] Furthermore, the overall lifting mechanism includes: a first lifting drive motor; a lifting guide rail; a lifting slide, the feeding mechanism being mounted on the lifting slide, the lifting slide being slidably connected to the lifting guide rail and being driven by the first lifting drive motor to move up and down along the lifting guide rail; and a code reading sensor, disposed on the lifting slide, for reading the sample dispensing head identification label on the sample dispensing head.

[0010] Furthermore, the feeding mechanism includes: a rotary drive motor; a second lifting drive motor; a ball spline pair for transmitting rotary and lifting motion; a clutch connected to the ball spline pair and driven to rotate by the rotary drive motor and to lift by the second lifting drive motor; the clutch engages or disengages with the sample feeding head through lifting, and in the engaged state, it drives the sample feeding head to feed material by rotation.

[0011] Furthermore, the sample dispensing head includes: a sample dispensing head housing; a sample dispensing head feeding device installed inside the sample dispensing head housing, the upper end of which is designed with a structure that cooperates with the clutch; a solid powder container detachably connected to the upper part of the sample dispensing head housing for holding solid powder; and a sample dispensing head identification label affixed to the outer surface of the sample dispensing head housing for storing information about the sample dispensing head and the solid powder it contains.

[0012] Furthermore, the windproof cover includes: a windproof cover body, which is composed of a right support plate, a front support plate, and a left support plate forming a C-shaped structure; at least one protective door, including a right protective door and a left protective door, which are slidably mounted on the windproof cover body; a protective door drive motor for driving the protective door to open or close; the windproof cover body and the overall lifting mechanism cooperate structurally to form a four-sided enclosed sample loading space when the protective door is closed.

[0013] Furthermore, the weighing base includes: a mounting base plate; a weighing sensor mounting base plate on which the weighing sensor is mounted; a weighing sensor vibration damping seat disposed between the mounting base plate and the weighing sensor mounting base plate to isolate the influence of external vibration on the weighing sensor; and a sample feeding mechanism vibration damping seat disposed on the mounting base plate, wherein the sample feeding mechanism is mounted on the mounting base plate via the sample feeding mechanism vibration damping seat to isolate the influence of vibration generated by the movement of the sample feeding mechanism itself on the weighing sensor.

[0014] Furthermore, the overall lifting mechanism also includes a container detection sensor, which is located at the lower part of the lifting slide to detect the height of the container below during the lifting process, so as to prevent the sample feeding mechanism from colliding with the container.

[0015] Furthermore, the feeding mechanism also includes: a sample feeding head bracket for supporting the sample feeding head; a sample feeding head detection sensor disposed on the sample feeding head bracket for detecting whether the sample feeding head is in place; and a sample feeding head positioning pin disposed on the sample feeding head bracket, which cooperates with the positioning hole on the sample feeding head for accurately positioning the sample feeding head and preventing it from spinning during feeding.

[0016] Furthermore, the lifting and lowering motion of the clutch is used to control its axial engagement and disengagement with the sample feeding device inside the sample feeding head. The rotational motion of the clutch drives the sample feeding device to rotate in the engaged state, thereby opening or closing the flow channel of the powder and realizing the quantitative addition of solid powder.

[0017] The beneficial effects of this invention are as follows:

[0018] With the assistance of an external robot or robotic arm, this device can automatically pick up and place the sample dispensing head and container, realizing various complex sample dispensing modes such as "one-to-one", "one-to-many", "many-to-one", and "many-to-many", reducing the intensity of manual operation and increasing the throughput.

[0019] This device creates a sealed sample addition environment by setting up a windproof cover, effectively preventing the ambient airflow from interfering with the dispersion of trace powders and the weighing process. By setting up multi-stage damping elements, it isolates the influence of external environmental vibration and the vibration of the equipment itself on the weighing sensor, ensuring the stability and accuracy of the weighing data and shortening the stabilization time, thereby achieving high-precision quantitative addition at the mg or even μg level. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an automated quantitative addition device for solid powders.

[0021] Figure 2 This is a schematic diagram of the sample dispensing mechanism.

[0022] Figure 3 This is a structural diagram of the overall lifting mechanism.

[0023] Figure 4 This is a schematic diagram of the feeding mechanism.

[0024] Figure 5 This is a structural diagram of the windproof cover.

[0025] Figure 6This is a structural diagram of the weighing base.

[0026] Figure 7 This is a schematic diagram of the sample dispensing head.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Control box; 2-Sample dispensing mechanism; 3-Weighing base; 4-Sample dispensing head;

[0029] 21-Integral lifting mechanism; 22-Feeding mechanism; 23-Wind shield;

[0030] 31-Mounting base plate; 32-Weighing sensor shock absorber seat; 33-Weighing sensor mounting base plate; 34-Weighing sensor; 35-Sample feeding mechanism shock absorber seat;

[0031] 41-Solid powder container; 42-Screw adapter; 43-Sample feeding head device; 44-Sample feeding head identification label; 45-Sample feeding head housing; 46-Lower sealing plug; 47-Sample feeding head fixing bracket;

[0032] 211-First lifting drive motor; 212-Lifting upper limit; 213-Lifting mechanism upright plate; 214-Lifting detection sensor; 215-Lifting lower limit; 216-Lifting mechanism base plate; 217-Upper support plate of protective cover; 218-Upper viewing window of protective cover; 219-Container detection sensor; 2110-Code reading sensor; 2111-Lifting slide; 2112-Lifting guide rail;

[0033] 221-Rotary drive motor; 222-Rotary drive pulley; 223-Rotary synchronous belt; 224-Second lifting drive motor; 225-Ball spline pair; 226-Rotary driven pulley; 227-Rotary origin monitoring sensor; 228-Lifting arm; 229-Clutch; 2210-Sample head bracket; 2211-Sample head detection sensor; 2212-Sample head positioning pin;

[0034] 231-Right support plate of the windproof cover; 232-Right protective door; 233-Observation window of the right protective door; 234-Drive motor of the protective door; 235-Opening and closing support of the protective door; 236-Synchronous belt pressure plate for opening and closing of the protective door; 237-Opening position sensor of the protective door; 238-Opening and closing synchronous belt of the protective door; 239-Closed position sensor of the protective door; 2310-Front support plate of the windproof cover; 2311-Front viewing window of the windproof cover; 2312-Left support plate of the windproof cover; 2313-Left protective door; 2314-Opening and closing guide rail of the protective door; 2315-Observation window of the left protective door. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. The components of the embodiments of the invention described and illustrated herein can generally be arranged and designed in various different configurations.

[0036] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] like Figure 1 As shown, this embodiment of an automated quantitative solid powder addition device mainly includes a control box 1, a sample addition mechanism 2, a weighing base 3, and a sample addition head 4. The control box 1 integrates electrical control components such as a PLC and a driver, responsible for receiving instructions, processing data, and controlling the coordinated actions of various components. Under the instructions of the control box 1, the sample addition mechanism 2 executes a series of complex sample addition actions. The weighing base 3 is used to support the container to be added and accurately measures the weight of the added powder in real time. The sample addition head 4 is a modular unit used to hold specific types of solid powder and can open or close the material channel under the drive of the sample addition mechanism 2. Multiple sample addition heads 4 for different powders are typically configured and replaced as needed by an external robot (not shown).

[0038] The entire workflow is as follows: An external robot places the dispensing head 4, containing the target powder, onto the dispensing mechanism 2, and places an empty container onto the weighing sensor 34 of the weighing base 3. The code reader 2110 on the dispensing mechanism 2 reads the dispensing head identification label 44 on the dispensing head 4 to obtain the powder type and corresponding dispensing parameters. Subsequently, the dispensing mechanism 2 lowers as a whole, bringing the outlet of the dispensing head 4 closer to the container opening. Next, the feeding mechanism 22 drives the dispensing head 4 to begin dispensing. The weighing sensor 34 monitors the weight inside the container in real time and feeds it back to the control box 1. When the weight approaches the target value, the control box 1 controls the feeding mechanism 22 to slow down the dispensing speed for precise addition, stopping dispensing immediately after the target weight is reached. Finally, the dispensing mechanism 2 rises and resets, completing one quantitative dispensing operation.

[0039] Please see Figure 2The sample feeding mechanism 2 includes an overall lifting mechanism 21, a feeding mechanism 22, and a wind shield 23. The overall lifting mechanism 21 is responsible for the macroscopic movement in the vertical direction. Its main function is to drive the feeding mechanism 22 and the sample feeding head 4 closer to the target container. This significantly shortens the falling distance of the powder in the air and effectively prevents powder scattering and waste caused by excessive height or airflow disturbance. The feeding mechanism 22 is the power unit for performing precision feeding. It provides the combined movements such as rotation and lifting required to drive the sample feeding head 4. The wind shield 23 creates a crucial, relatively sealed microenvironment, designed to eliminate the interference of airflow generated by the external environment (such as air conditioning vents and personnel movement) on the weighing process of trace powders. It is an important guarantee for achieving high-precision weighing.

[0040] Please see Figure 3 This is the detailed structure of the overall lifting mechanism 21. Its movement is driven by the first lifting drive motor 211, which, through a transmission mechanism (such as a lead screw or synchronous belt, not shown in detail), causes the lifting slide 2111 to move smoothly up and down along the lifting guide rail 2112. The feeding mechanism 22 is fixed on this lifting slide 2111. To ensure safety and prevent accidents, physical limits are set at both ends of the mechanism, namely the upper lifting limit 212 and the lower lifting limit 215, to prevent the slide from detaching from the guide rail in case of a control system malfunction. The lifting mechanism upright plate 213 and the lifting mechanism base plate 216 constitute a sturdy mounting base, forming a stable support structure with the windproof cover 23.

[0041] To create a closed top, a protective cover upper support plate 217 and a protective cover upper viewing window 218 are installed. These, together with the windproof cover 23, isolate the sample application area from the environment above. The transparent protective cover upper viewing window 218 allows operators to observe the sample application process from above.

[0042] The overall lifting mechanism 21 is also equipped with two sensors. The first is a container detection sensor 219, a non-contact sensor (such as a laser rangefinder or photoelectric sensor) installed at the front end of the mechanism's descent path to detect the height of the container below in real time. This design aims to prevent the descending mechanism (especially the viewing window 218 on the protective cover) from directly pressing on the container due to misalignment, incorrect model, or abnormal height. Such pressure would be transmitted to the high-precision weighing sensor 34, potentially causing it to exceed its weighing range and resulting in irreversible damage. The second sensor is a barcode or QR code scanner 2110, typically a barcode or QR code scanner, used to automatically read the sample head identification label 44 on the sample head 4, thereby invoking a preset, optimized sample dispensing program for that specific powder (considering its density, flowability, etc.). This is crucial for achieving fully automated dispensing of multiple powders.

[0043] Please see Figure 4The feeding mechanism 22 achieves compound motion through two motors. The rotary drive motor 221 transmits rotational motion to the spline shaft of the ball spline pair 225 via the rotating drive pulley 222, the rotating synchronous belt 223, and the rotating driven pulley 226. Simultaneously, the second lifting drive motor 224 drives the spline sleeve of the ball spline pair 225 to perform a small range of vertical lifting and lowering via the lifting arm 228. The clutch 229 is mounted on the ball spline pair 225, allowing it to both rotate with the spline shaft and rise and fall with the spline sleeve. This design cleverly achieves the decoupling and compounding of two functions: the lifting motion of the clutch 229 is used for axial engagement or disengagement with the feeding device 43 inside the feeding head 4; while in the engaged state, the rotational motion of the clutch 229 drives the feeding head 4 to discharge material. The rotation origin monitoring sensor 227 is used to calibrate the zero position of the clutch 229's rotation, achieving precise angle control.

[0044] The sample dispensing head 4 is placed on the sample dispensing head bracket 2210. The bracket is equipped with a sample dispensing head detection sensor 2211 (such as a photoelectric or proximity switch) to confirm whether the sample dispensing head 4 is correctly placed. The sample dispensing head positioning pin 2212 on the bracket cooperates with the positioning hole on the sample dispensing head 4, which not only ensures the uniqueness and accuracy of the installation position of the sample dispensing head 4, but also provides reverse torque support to prevent the sample dispensing head 4 from spinning as a whole when driven by the rotation of the clutch 229.

[0045] Please see Figure 5 The windproof cover 23 comprises a right support plate 231, a front support plate 2310, and a left support plate 2312, forming a C-shaped main structure. Its back is connected to the lifting mechanism upright plate 213, thus creating a four-sided enclosed chamber. To facilitate the loading and unloading of containers by an external robot, the windproof cover is equipped with an automatically opening and closing right protective door 232 and a left protective door 2313. These two doors are slidably connected to the main body via protective door opening and closing guide rails 2314. The protective door drive motor 234 drives the protective doors to open or close synchronously to both sides via a protective door opening and closing timing belt 238. The protective door opening and closing timing belt pressure plate 236 fixes the door body to the timing belt 238, while the protective door opening and closing support 235 provides support. To ensure the reliability of the automated process, a protective door opening position sensor 237 and a protective door closing position sensor 239 are installed to detect the door status. The weighing and sampling procedures can only be started after the sensor detects that the door is completely closed; similarly, the door will only be opened after sampling is completed to ensure absolute environmental stability during the most critical sampling stage. For easy observation, transparent observation windows are installed on both the protective door and the front support plate, namely the right protective door observation window 233, the left protective door observation window 2315, and the windproof cover front viewing window 2311.

[0046] Please see Figure 6The entire device is fixed to the workbench via a mounting base 31, and its core feature is dual vibration damping. First, a high-precision load cell 34 is fixed to an independent load cell mounting base 33, which is flexibly connected to the main mounting base 31 via a load cell vibration damping seat 32. This damping seat 32 (such as a rubber damping block) effectively absorbs and isolates external environmental vibrations transmitted from the workbench (such as the operation of nearby equipment or personnel movement). Second, the source of vibration, the sample feeding mechanism 2, is mounted on the mounting base 31 via another independent sample feeding mechanism vibration damping seat 35. The function of this damping seat 35 is to absorb the internal vibrations generated by the various motors of the sample feeding mechanism 2 (such as the first lifting drive motor 211, the rotary drive motor 221, and the second lifting drive motor 224) during start-up, shutdown, and operation, preventing these vibrations from being transmitted to the sensitive load cell 34 through the base plate. This dual vibration damping design ensures that the load cell 34 operates in a stable environment from both internal and external perspectives, which is the foundation for achieving high-precision weighing and shortening the reading stabilization time.

[0047] Please see Figure 7 The sample dispensing head 4 mainly consists of a sample dispensing head housing 45 forming the main frame. Its upper part is connected to a replaceable solid powder container 41 (usually a standard reagent bottle) via a screw adapter 42. The screw adapter 42 is designed to be compatible with reagent bottles of different thread specifications. The sample dispensing head feeding device 43 is installed inside the housing, and its internal structure may include a screw conveyor or vibratory feeder. Its upper end is designed with an interface that can engage with the clutch 229 on the feeding mechanism 22. The lower sealing head 46 is a self-sealing design; when there is no external force (i.e., the clutch is disengaged), it can automatically seal the outlet by gravity or elasticity to prevent powder leakage during standby or handling. A sample dispensing head identification label 44 is attached to the housing, recording the powder ID, batch number, safety information, etc., for automated identification and traceability. The sample dispensing head fixing bracket 47 is the interface between the sample dispensing head and the sample dispensing mechanism bracket; its positioning hole engages with the sample dispensing head positioning pin 2212 to prevent self-rotation.

[0048] An automated quantitative addition device for solid powders is constructed through mechanical structure design, closed-loop control with multi-sensor fusion, and a dual damping system. It not only solves the various drawbacks of traditional manual weighing but also significantly improves automation, addition accuracy, stability, and safety, effectively meeting the needs of modern laboratories for high-efficiency, high-precision sample preparation.

[0049] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. An automated quantitative addition device for solid powder, characterized in that, include: Control box (1); The sample dispensing mechanism (2) is electrically connected to the control box (1); Weighing base (3) is located below the sample feeding mechanism (2); The sample dispensing head (4) is detachably mounted on the sample dispensing mechanism (2) and is used to hold solid powder; The sample feeding mechanism (2) is used to drive the sample feeding head (4) to perform a feeding action, adding solid powder from the sample feeding head (4) into a container placed on the weighing base (3); the weighing base (3) has a built-in weighing sensor (34) for measuring the weight of the solid powder in the container in real time and feeding back the weight data to the control box (1) to control the sample feeding process.

2. The automated quantitative addition device for solid powder according to claim 1, characterized in that, The sample dispensing mechanism (2) includes: The overall lifting mechanism (21) is used to drive the entire sample feeding mechanism (2) to perform lifting and lowering movements; The feeding mechanism (22) is installed on the overall lifting mechanism (21) and is used to drive the sample feeding head (4) to perform specific feeding or cutting-off actions; A windproof cover (23) is connected to the overall lifting mechanism (21) and is used to cover the lower end of the sample feeding head (4) and the container when the sample is added.

3. The automated quantitative addition device for solid powder according to claim 2, characterized in that, The overall lifting mechanism (21) includes: First lifting drive motor (211); Lifting guide rail (2112); The lifting slide (2111) is mounted on the lifting slide (2111), and the feeding mechanism (22) is slidably connected to the lifting guide rail (2112). The lifting slide (2111) is driven by the first lifting drive motor (211) to move up and down along the lifting guide rail (2112). A code reading sensor (2110) is installed on the lifting slide (2111) and is used to read the sample head identification label (44) on the sample head (4).

4. The automated quantitative addition device for solid powder according to claim 2, characterized in that, The feeding mechanism (22) includes: Rotary drive motor (221); Second lifting drive motor (224); The ball spline pair (225) is used to transmit rotary and lifting motion; The clutch (229) is connected to the ball spline pair (225) and is driven to rotate by the rotary drive motor (221) and to rise and fall by the second lifting drive motor (224); The clutch (229) engages or disengages with the sample feeding head (4) by lifting and lowering. In the engaged state, the sample feeding head (4) is driven to feed material by rotation.

5. The automated quantitative addition device for solid powder according to claim 1, characterized in that, The sample dispensing head (4) includes: Sample dispensing head housing (45); The sample feeding head device (43) is installed inside the sample feeding head housing (45), and its upper end is designed with a structure that cooperates with the clutch (229); A solid powder container (41) is detachably connected to the upper part of the sample dispensing head housing (45) for holding solid powder; A label (44) for the sample dispensing head is affixed to the outer surface of the sample dispensing head housing (45).

6. The automated quantitative addition device for solid powder according to claim 2, characterized in that, The windproof cover (23) includes: The main body of the windproof cover is composed of a C-shaped structure consisting of the right support plate (231), the front support plate (2310), and the left support plate (2312). At least one protective door, including a right protective door (232) and a left protective door (2313), the protective door being slidably mounted on the windproof cover body; A protective door drive motor (234) is used to drive the protective door to open or close. The windproof cover body and the overall lifting mechanism (21) work together to form a four-sided enclosed sample loading space when the protective door is closed.

7. The automated quantitative addition device for solid powder according to claim 1, characterized in that, The weighing base (3) includes: Install base plate (31); A load cell mounting base plate (33) is provided on which the load cell (34) is mounted; The load cell shock absorber (32) is disposed between the mounting base plate (31) and the load cell mounting base plate (33) to isolate the load cell from the influence of external vibration. The sample feeding mechanism damping seat (35) is set on the mounting base plate (31). The sample feeding mechanism (2) is mounted on the mounting base plate (31) through the sample feeding mechanism damping seat (35) to isolate the influence of the vibration generated by the movement of the sample feeding mechanism (2) on the weighing sensor.

8. The automated quantitative addition device for solid powder according to claim 3, characterized in that, The overall lifting mechanism (21) also includes a container detection sensor (219), which is located at the lower part of the lifting slide (2111) and is used to detect the height of the container below during the lifting process to prevent the sample feeding mechanism (2) from colliding with the container.

9. The automated quantitative addition device for solid powder according to claim 4, characterized in that, The feeding mechanism (22) further includes: A sample dispensing head bracket (2210) is used to support the sample dispensing head (4); A sample dispensing head detection sensor (2211) is installed on the sample dispensing head bracket (2210) to detect whether the sample dispensing head (4) is in place; The sample feeding head positioning pin (2212) is set on the sample feeding head bracket (2210) and cooperates with the positioning hole on the sample feeding head (4) to accurately position the sample feeding head and prevent it from spinning during feeding.

10. The automated quantitative addition device for solid powder according to claim 4, characterized in that, The lifting and lowering motion of the clutch (229) is used to control its axial engagement and disengagement with the feeding device (43) inside the feeding head (4). The rotational motion of the clutch (229) drives the feeding device (43) to rotate in the engaged state, thereby opening or closing the flow channel of the powder and realizing the quantitative addition of solid powder.

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