Fast conversion device for powder sample adding

Abstract

The invention discloses a powder sample adding and quick changing device. According to the device, powder sample adding is conducted through a conical closed screw of a closed sample adding powder bottle, the rotary electric clamping jaw mechanism clamps and rotates the conical closed screw through an electric clamping jaw assembly so as to accelerate powder falling, the sliding table air cylinder lifting table clamps or replaces the closed sample adding powder bottle through a jaw clamping assembly, and lifting of the conical closed screw is controlled; opening and closing of an outlet of the closed sample adding powder bottle and powder sample adding are further controlled. The conical plug opening designed in the closed sample adding powder bottle can effectively control falling of powder and timely close the powder bottle to stop sample adding, the sealing performance and accuracy in the sample adding process are effectively improved, and therefore the precision and efficiency of powder sample adding are improved; weighing errors and equipment pollution caused by frequent operation and powder leakage or residue are avoided; the device supports full-automatic operation, does not need manual intervention, can directly complete powder sample adding operation in an oxygen-free, water-free or vacuum environment, and is simple and reasonable in overall structure, convenient to operate, stable and reliable.

Description

Technical Field

[0001] This invention relates to a sample dispensing device, to the field of compound synthesis apparatus, and specifically to a powder dispensing rapid conversion device. Background Technology

[0002] In laboratory chemistry processes, traditional powder loading typically relies on chemical engineers repeatedly placing reagent containers on an electronic balance and manually weighing them by pouring or scraping to achieve the target loading amount. This process is highly dependent on the operator's experience and manual stability, which not only easily introduces weighing errors but also easily causes powder scattering during pouring, recovery, and adjustment, leading to workbench and environmental contamination, and consequently causing cross-contamination and experimental consistency issues. Because powder loading occurs frequently in chemical synthesis experiments and each operation is time-consuming, it consumes a significant amount of researchers' time, significantly reducing experimental efficiency and limiting their involvement in higher-value research work such as reaction design and mechanism analysis. Furthermore, for reactions requiring oxygen-free, anhydrous, or even vacuum conditions, manual powder loading often requires frequent opening and closing of the reaction system or transferring containers, resulting in complex and poorly controllable procedures. It is difficult to effectively isolate environmental gases and moisture, and it cannot reliably guarantee the purity of reactants and the repeatability of process conditions, thus increasing the experimental failure rate and hindering the reliable conduct of chemical research and development activities. Summary of the Invention

[0003] In order to solve the problems existing in the background art, the present invention provides a powder sample fast conversion device.

[0004] The technical solution adopted in this invention is: I. A powder dispensing quick-change device, comprising: A powder dispensing bracket is installed in a fixed position and used for the overall installation of a powder dispensing quick-change device.

[0005] A sealed powder dispensing bottle is used to store powder and to dispense powder via a conical sealed screw.

[0006] The rotating electric gripper mechanism is vertically installed on the top side of the powder dispensing holder and directly above the sealed powder bottle. During the powder dispensing process, it uses the electric gripper assembly at its bottom to grip and rotate the conical sealed screw to accelerate the falling of powder from the sealed powder bottle.

[0007] The sliding cylinder lifting platform is installed on the top of the powder dispensing bracket and uses its side claw clamp assembly to hold or replace the sealed powder dispensing bottle. It is used to lift the sealed powder dispensing bottle to control the lifting of the conical sealing screw, thereby controlling the opening and closing of the outlet of the sealed powder dispensing bottle and the powder dispensing.

[0008] The sealed powder dispensing bottle also includes an inverted conical powder bottle body, a powder bottle cap, a switch limiting spring, and a limiting nut. The powder bottle cap is sealed on the top of the powder bottle body. A through hole and a circular boss are provided at the center top of the powder bottle cap. A conical sealing screw is vertically inserted into the central through hole and the circular boss of the powder bottle cap. The top of the conical sealing screw is located above the through hole and is fitted with a limiting nut. The switch limiting spring is fitted onto the conical sealing screw between the limiting nut and the circular boss. A powder bottle outlet is provided at the bottom of the powder bottle body. The bottom of the conical sealing screw is located inside the powder bottle body and directly above the powder bottle outlet. The electric gripper assembly of the rotating electric gripper mechanism grips and rotates the conical sealing screw during powder dispensing. The gripper assembly of the sliding cylinder lifting platform holds the top side of the powder bottle body.

[0009] The powder bottle body has two through cavities inside. The upper cavity has a gradually decreasing diameter, and the lower cavity is a cylindrical cavity coaxial with the upper cavity. The diameter of the through opening between the two cavities is smaller than the diameter of the lower cavity. The lower part of the conical sealing screw is integrally formed by a coaxial variable cross-section rod with a gradually decreasing diameter, a helical rod, and a conical plug. The conical plug is a perfect circle cone with a bottom diameter slightly larger than the diameter of the through opening. When the powder bottle outlet is open, the conical plug is located directly above the through opening. When the powder bottle outlet is closed, the conical plug completely blocks the through opening.

[0010] The powder bottle cap also has a feeding port for adding powder on the side of the central through hole, and the feeding port is sealed with a rubber feeding port plug.

[0011] The rotating electric gripper mechanism is mounted on the top side of the powder dispensing holder. The electric gripper assembly of the rotating electric gripper mechanism includes a first electric gripper and a second electric gripper mounted on the electric gripper cylinder mounting plate. During the powder dispensing process, the limiting nut of the rotating conical sealing screw is clamped between the first electric gripper and the second electric gripper, and the rotating conical sealing screw rotates around the central axis of the powder bottle body to accelerate the powder from the powder bottle outlet without contact. The rotating electric gripper mechanism is connected to an external power source through an external power interface.

[0012] The first and second electric grippers are respectively fitted with a first rubber gripper sleeve and a second rubber gripper sleeve to increase friction.

[0013] The sliding cylinder lifting platform further includes two claw connecting plates, two claw cylinders, a claw cylinder mounting plate, a connecting plate, a lifting cylinder mounting plate, a lifting cylinder, and a quick-change connecting plate. The quick-change connecting plate is vertically installed on the side of the powder sample feeding bracket away from the rotating electric claw mechanism. The lifting cylinder is installed on the side of the quick-change connecting plate near the rotating electric claw mechanism via the lifting cylinder mounting plate. The claw cylinder mounting plate is installed on the sliding platform of the lifting cylinder via the connecting plate. The two claw cylinders are symmetrically installed in the claw cylinder mounting plate. The claw assembly includes a first claw and a second claw. Both the first claw and the second claw are L-shaped plates and symmetrically arranged at intervals. One section of the first claw and the second claw are respectively installed on the sliding platform of the two claw cylinders via the two claw connecting plates. The other section of the first claw and the second claw forms a circle on the opposite side and is used to clamp the powder bottle body.

[0014] II. A powder dispensing quick-change device dispensing method, comprising: When the powder dispensing quick-change device is used for dispensing, the powder is located inside the upper cavity of the sealed powder bottle. The lifting cylinder of the sliding table controls the claw assembly to descend to the position of the powder bottle body. The two claw cylinders control the claw assembly to clamp the sealed powder bottle. Then, the lifting cylinder controls the claw assembly to rise, so that the limiting nut moves into the electric claw assembly of the rotating electric claw mechanism and is clamped. The lifting cylinder controls the raising and lowering of the powder bottle body, so that the conical stopper of the conical sealing screw opens or closes the powder bottle outlet. When the powder bottle outlet opens and the powder falls, the rotating electric claw mechanism rotates the conical sealing screw, and then the screw rotates to accelerate the falling of the powder.

[0015] The beneficial effects of this invention are: Compared to existing unmanned powder dispensing equipment, the powder quick-change dispensing device proposed in this invention achieves automatic and precise dispensing of trace amounts of powder under fully enclosed conditions through the integrated structural design of the sealed powder bottle and dispensing channel. This effectively avoids the risks of contamination, oxidation, and cross-contamination caused by manual dispensing. The specially designed conical stopper in the sealed powder bottle device can effectively control the powder falling and promptly close the powder bottle to stop dispensing, effectively improving the sealing and accuracy of the dispensing process. This improves the precision and efficiency of powder dispensing and avoids weighing errors and equipment contamination caused by frequent operation, powder leakage, or residue. The device can operate stably in anhydrous and oxygen-free environments, significantly improving its applicability to water-sensitive and oxygen-sensitive drug intermediates. By introducing a high-precision weighing module, online feedback and closed-loop control of sample dispensing quality are achieved, with dispensing errors stably controlled within ±0.5 mg, balancing accuracy and repeatability. Simultaneously, the quick-change powder bottle structure improves the efficiency of switching between multiple product types and supports long-term continuous operation, providing a safe, reliable, and uninterrupted unmanned powder dispensing solution for laboratories and automated synthesis platforms. The device supports fully automated operation without manual intervention, and powder dispensing can be performed directly in oxygen-free, anhydrous, or vacuum environments. The overall structure is simple and reasonable, easy to operate, and the system is stable and reliable. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the powder quick-change sample dispensing device of the present invention; Figure 2 This is a structural diagram of the rotary electric gripper mechanism of the present invention; Figure 3 This is a structural diagram of the sealed sample dispensing bottle of the present invention; Figure 4 This is a structural diagram of the slide cylinder lifting platform of the present invention; Figure 5 This is a structural diagram of the powder sample loading support of the present invention; In the diagram: 1a first support, 1b second support, 2 powder dispensing support, 3 powder bottle outlet, 4 conical stopper, 5 powder bottle body, 6 sealed powder dispensing bottle, 7 conical sealing screw, 8 rubber dispensing stopper, 9 dispensing port, 10 powder bottle cap, 11 rotary electric gripper mechanism, 12 switch limit spring, 13 limit nut, 14 powder quick-change connecting plate, 15 slide cylinder lifting platform, 16 electromagnetic dial changing plate, 17 first gripper, 18 second gripper, 19 gripper. Clamping connecting plate 19, claw cylinder 20, claw cylinder mounting plate 21, connecting plate 22, lifting cylinder mounting plate 23, lifting cylinder 24, quick-change connecting plate 25, first rubber claw sleeve 26, second rubber claw sleeve 27, first electric claw clamp 28, second electric claw clamp 29, electric claw cylinder 30, electric claw cylinder mounting plate 31, mounting base plate 35, external power interface 36, first positioning screw hole 37, second positioning screw hole 38, screw 39. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, the powder dispensing quick-change device of the present invention includes a powder dispensing support 2, a sealed powder dispensing bottle 6, a rotary electric gripper mechanism 11, and a sliding cylinder lifting platform 15. The powder dispensing support 2 is installed in a fixed position and is used for the overall installation of the powder dispensing quick-change device. The sealed powder dispensing bottle 6 is used to store powder and to dispense powder through a conical sealing screw 7. The rotary electric gripper mechanism 11 is vertically installed on the top side of the powder dispensing support 2 and located directly above the sealed powder dispensing bottle 6. During the powder dispensing process, it uses the electric gripper assembly at its bottom to grip and rotate the conical sealing screw 7 to accelerate the falling of powder from the sealed powder dispensing bottle 6. The sliding cylinder lifting platform 15 is installed on the top of the powder dispensing support 2 and uses the gripper assembly on its side to hold or replace the sealed powder dispensing bottle 6. It is used to raise and lower the sealed powder dispensing bottle 6 to control the raising and lowering of the conical sealing screw 7, thereby controlling the opening and closing of the outlet of the sealed powder dispensing bottle 6 and the powder dispensing.

[0019] like Figure 3 As shown, the sealed powder bottle 6 also includes an inverted conical powder bottle body 5, a powder bottle cap 10, a switch limiting spring 12, and a limiting nut 13. The powder bottle cap 10 seals the top of the powder bottle body 5. A through hole is opened at the center top of the powder bottle cap 10, and a circular boss is provided. A conical sealing screw 7 is vertically inserted into the center through hole and the circular boss of the powder bottle cap 10. The top of the conical sealing screw 7 is located above the through hole and is fitted with the limiting nut 13. The switch limiting spring 12 is fitted into the limiting nut 13 and the circular boss. The conical sealed screw 7 is located between the platforms; the bottom end of the powder bottle body 5 is opened with a powder bottle outlet 3, and the bottom end of the conical sealed screw 7 is located inside the powder bottle body 5 and directly above the powder bottle outlet 3; the electric gripper assembly of the rotating electric gripper mechanism 11 grips and rotates the conical sealed screw 7 during the powder sample addition process; the gripper assembly of the sliding cylinder lifting platform 15 holds the top side of the powder bottle body 5, the upper part of the powder bottle body 5 is cylindrical and the lower part is conical, and the gripper assembly holds the upper cylindrical circumference of the powder bottle body 5.

[0020] Through detailed dimensional calculations and design of the overall dimensions of the sealed powder dispensing bottle 6, the sealed powder dispensing bottle 6 can provide a sealing effect superior to that of a laboratory platform, providing an anhydrous and oxygen-free environment for the powder. The designed conical sealing screw 7, together with the rotating electric gripper mechanism 11 and the sliding cylinder lifting platform 15, can effectively control the powder dispensing and closing of the powder bottle body 5 in real time.

[0021] The interior of the powder bottle body 5 consists of two interconnected cavities. The upper cavity has a gradually decreasing diameter, while the lower cavity is a cylindrical cavity coaxial with the upper cavity. The diameter of the opening between the two cavities is smaller than that of the lower cavity. In practice, the upper cavity of the powder bottle body 5 is composed of a cylinder and an inverted cone, while the lower cavity is cylindrical. The lower part of the conical sealing screw 7 is integrally formed by a coaxial variable cross-section rod with a gradually decreasing diameter, a helical rod, and a conical stopper 4. The conical stopper 4 is a perfect circular cone with a bottom diameter slightly larger than that of the opening. When the powder bottle outlet 3 is open, the conical stopper 4 is located directly above the opening. When the powder bottle outlet 3 is closed, the conical stopper 4 completely blocks the opening.

[0022] The powder bottle cap 10 has a feeding port 9 for adding powder on the side of the central through hole. Each feeding port 9 is sealed with a rubber feeding port plug 8. In practice, two feeding ports 9 are symmetrically located on both sides of the central through hole above the powder bottle cap 10. The overall design can efficiently fill the sealed powder bottle 6 and provide a sealed environment. The rubber feeding port plug 8 provides an anhydrous and oxygen-free sealed environment for the powder, which greatly reduces working time and reduces the contamination rate of the raw material powder compared to manual operation. Through detailed dimensional calculations and design of the overall dimensions of the sealed powder bottle 6, the entire sealed powder bottle 6 can provide a sealing effect superior to that of a laboratory platform, providing an anhydrous and oxygen-free environment for the powder. The designed conical sealing screw 7, together with the rotating electric gripper mechanism 11 and the sliding cylinder lifting platform 15, can effectively control the powder dispensing and closing of the powder bottle body 5 in real time.

[0023] like Figure 2 As shown, the body of the rotary electric gripper mechanism 11 is mounted on the top side of the powder dispensing holder 2. The electric gripper assembly of the rotary electric gripper mechanism 11 includes a first electric gripper 28 and a second electric gripper 29 mounted via an electric gripper cylinder mounting plate 31. During powder dispensing, the limiting nut 13 of the rotating conical sealing screw 7 clamps between the first electric gripper 28 and the second electric gripper 29, rotating the rotating conical sealing screw 7 around the central axis of the powder bottle body 5 to accelerate the powder from the powder bottle outlet 3 without contact. The rotary electric gripper mechanism 11 is connected to an external power source via an external power interface 36. Two electric gripper cylinders 30 are also installed in the electric gripper cylinder mounting plate 31 to control the opening and closing of the first electric gripper 28 and the second electric gripper 29, respectively. The body of the rotary electric gripper mechanism 11 is assembled with screws 39. The model of the rotary electric gripper mechanism 11 is RGIC-35-12-OS. The first electric claw clamp 28 and the second electric claw clamp 29 are respectively fitted with a first rubber claw clamp sleeve 26 and a second rubber claw clamp sleeve 27 to increase friction, thereby enhancing the tightening effect of the limit nut 13.

[0024] The rotating electric gripper mechanism 11 clamps and limits the nut 13, which is fastened to the top of the conical sealing screw 7. This clamping mechanism 11 is used to secure the sealed powder dispensing bottle 6. The subsequent rotation of the conical sealing screw 7 controls the powder dispensing process of the entire system. The powder is located inside the cavity of the bottle body 5. The conical sealing screw 7 penetrates the bottle body 5 and, through its own thread, carries the powder out of the bottle body 5. The conical stopper 4 at the tail of the conical sealing screw 7 dispenses the powder. The closure of the opening is controlled by the lifting cylinder 23 of the sliding cylinder lifting platform 15, which controls the vertical movement of the powder bottle body 5. Since the rotating electric gripper mechanism 11 is already fixed in position, the lifting process is controlled by the extension and retraction of the switch limit spring 12, which controls the lifting of the powder bottle body 5. The internal conical sealing screw 7 does not move up and down, which determines whether the outlet below the conical stopper 4 is open or closed. This operation process realizes real-time control of the start and end of powder addition, reducing the situation of residual powder contaminating the work surface due to reaction delay.

[0025] like Figure 4 As shown, the sliding cylinder lifting platform 15 also includes two gripper connecting plates 19, two gripper cylinders 20, a gripper cylinder mounting plate 21, a connecting plate 22, a lifting cylinder mounting plate 23, a lifting cylinder 24, and a quick-change connecting plate 25. The quick-change connecting plate 25 is vertically installed on the side of the powder sample feeding holder 2 away from the rotating electric gripper mechanism 11. The lifting cylinder 24 is installed on the side of the quick-change connecting plate 25 near the rotating electric gripper mechanism 11 via the lifting cylinder mounting plate 23. The gripper cylinder mounting plate 21 is installed via the connecting plate 22. On the slide of the lifting cylinder 24, two claw cylinders 20 are symmetrically installed in the claw cylinder mounting plate 21. The claw assembly includes a first claw 17 and a second claw 18. Both the first claw 17 and the second claw 18 are L-shaped plates and are arranged symmetrically at intervals. One section of the first claw 17 and the second claw 18 are respectively installed on the slide of the two claw cylinders 20 through two claw connecting plates 19. The other section of the first claw 17 and the second claw 18 forms a circle on the opposite side and is used to clamp the body of the powder bottle 5.

[0026] like Figure 5As shown, the powder dispensing support 2 includes a first support 1a, a second support 1b, a powder quick-change connecting plate 14, and a mounting base plate 35. The mounting base plate 35 is installed at a fixed position. The first support 1a and the second support 1b are symmetrically installed on the mounting base plate 35. The powder quick-change connecting plate 14 is horizontally and detachably installed on the top surface of the first support 1a and the second support 1b. The top surface of the first support 1a and the second support 1b are respectively provided with a second positioning screw hole 38 and a first positioning screw hole 37. The powder quick-change connecting plate 14 is fastened by a limit pin and the second positioning screw hole 38 and the first positioning screw hole 37 to ensure that the operating table always maintains the same fixed state. The quick-change connecting plate 25 is vertically installed on the bottom surface of the powder quick-change connecting plate 14 away from the rotating electric gripper mechanism 11. The quick-change mounting plate 25 is connected to the powder quick-change connecting plate 14 above it. The rotating electric gripper mechanism 11 is installed on the side of the powder quick-change connecting plate 14 by screws to ensure that the rotating electric gripper mechanism 11 can grasp a new sealed powder dispensing bottle 6 at a fixed point. The electromagnetic etching disk 16 is mounted on top of the powder quick-change connecting plate 14.

[0027] The sliding cylinder lifting platform 15 also includes an electromagnetic etching plate 16, which is installed on the top of the powder quick-change connecting plate 14 of the powder sample feeding bracket 2. The electromagnetic etching plate 16 is an external connecting component of the entire device. The lifting module outside the device can use power to magnetically grip the powder quick-change connecting plate 14 and the sliding cylinder lifting platform 15, so that the whole device can be moved to a specific powder bottle placement area to replace and pick up a new sealed sample feeding powder bottle 6, or to perform sample feeding operations at other points, providing a fastening interface for other external equipment to move the entire device.

[0028] The powder dispensing quick-change device of the present invention provides the following specific dispensing method: When the powder dispensing quick-change device dispenses powder, the powder is located inside the upper cavity of the sealed powder bottle 6. The lifting cylinder 24 of the sliding cylinder lifting platform 15 controls the jaw assembly to descend to the position of the powder bottle 5. Two jaw cylinders 20 control the jaw assembly to grip the sealed powder bottle 6. Then, the lifting cylinder 24 controls the jaw assembly to rise, causing the limit nut 13 to move into the electric jaw assembly of the rotating electric jaw mechanism 11 and be clamped. The lifting cylinder 24 controls the raising and lowering of the powder bottle 5, causing the conical sealing screw 7... The conical stopper 4 opens or closes the powder bottle outlet 3. Since the rotating electric gripper mechanism 11 is already fixed in position, the lifting and lowering process is controlled by the extension and retraction of the switch limit spring 12 to control the lifting and lowering of the powder bottle body 5. The internal conical sealing screw 7 remains stationary, which determines whether the outlet below the conical stopper 4 is open or closed, realizing the instant start and end of powder addition and reducing the situation of residual powder contaminating the work surface due to reaction delay. When the powder bottle outlet 3 is open and powder is falling, the rotating electric gripper mechanism 11 rotates the conical sealing screw 7, and then the screw rod rotates to accelerate the powder falling.

[0029] The embodiments described above are merely some preferred embodiments of the present invention, and are not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A quick-change device for powder dispensing, characterized in that, include: Powder sample holder (2) is installed in a fixed position and used for the overall installation of the powder sample quick-change device; A sealed powder bottle (6) is used to store powder and to add powder via a conical sealed screw (7); The rotating electric gripper mechanism (11) is vertically installed on the top side of the powder dispensing bracket (2) and directly above the sealed powder dispensing bottle (6). During the powder dispensing process, it uses the electric gripper assembly at its bottom to grip and rotate the conical sealed screw (7) to accelerate the powder falling from the sealed powder dispensing bottle (6). The sliding cylinder lifting platform (15) is installed on the top of the powder dispensing bracket (2) and clamps or replaces the sealed powder dispensing bottle (6) through the claw clamp assembly on its side. It is used to lift the sealed powder dispensing bottle (6) to control the lifting of the conical sealing screw (7), thereby controlling the opening and closing of the outlet of the sealed powder dispensing bottle (6) and the powder dispensing.

2. The powder dispensing quick-change device according to claim 1, characterized in that: The sealed sample powder bottle (6) also includes an inverted conical powder bottle body (5), a powder bottle cap (10), a switch limiting spring (12), and a limiting nut (13). The powder bottle cap (10) seals the top of the powder bottle body (5). The center top of the powder bottle cap (10) has a through hole and a circular boss. The conical sealing screw (7) is vertically inserted into the center through hole and the circular boss of the powder bottle cap (10). The top of the conical sealing screw (7) is located above the through hole and is fitted with a limiting nut (13). The switch limiting spring (12) is fitted on the conical sealing screw (7) between the limiting nut (13) and the circular boss. The bottom end of the powder bottle body (5) has a powder bottle outlet (3). The bottom end of the conical sealing screw (7) is located inside the powder bottle body (5) and directly above the powder bottle outlet (3). The electric gripper assembly of the rotating electric gripper mechanism (11) grips and rotates the conical sealed screw (7) during the powder feeding process; the gripper assembly of the slide cylinder lifting platform (15) grips the top side of the powder bottle body (5).

3. The powder dispensing quick-change device according to claim 2, characterized in that: The interior of the powder bottle body (5) consists of two through cavities. The upper cavity is a cavity with a gradually decreasing diameter, and the lower cavity is a cylindrical cavity coaxial with the upper cavity. The diameter of the through opening between the two cavities is smaller than the diameter of the lower cavity. The lower rod of the conical sealing screw (7) is integrally formed by a coaxial variable cross-section rod with a gradually decreasing diameter, a spiral rod, and a conical plug (4). The conical plug (4) is a perfect circular cone and its bottom diameter is larger than the diameter of the through opening. When the powder bottle outlet (3) is open, the conical plug (4) is located directly above the through opening. When the powder bottle outlet (3) is closed, the conical plug (4) completely blocks the through opening.

4. The powder dispensing quick-change device according to claim 2, characterized in that: The powder bottle cap (10) is provided with a feeding port (9) for adding powder on the side of the central through hole. Each feeding port (9) is sealed with a rubber feeding port plug (8).

5. The powder dispensing quick-change device according to claim 2, characterized in that: The body of the rotary electric gripper mechanism (11) is installed on the top side of the powder dispensing bracket (2). The electric gripper assembly of the rotary electric gripper mechanism (11) includes a first electric gripper (28) and a second electric gripper (29). During the powder dispensing process, the limiting nut (13) of the rotary conical sealing screw (7) is clamped between the first electric gripper (28) and the second electric gripper (29). The rotary conical sealing screw (7) rotates around the central axis of the powder bottle body (5) to accelerate the powder from the powder bottle outlet (3) to fall without contact. The rotary electric gripper mechanism (11) is connected to an external power source through an external power interface (36).

6. The powder dispensing quick-change device according to claim 5, characterized in that: The first electric gripper (28) and the second electric gripper (29) are respectively fitted with a first rubber gripper sleeve (26) and a second rubber gripper sleeve (27) for increasing friction.

7. The powder dispensing quick-change device according to claim 2, characterized in that: The slide cylinder lifting platform (15) further includes two gripper connecting plates (19), two gripper cylinders (20), a gripper cylinder mounting plate (21), a connecting plate (22), a lifting cylinder mounting plate (23), a lifting cylinder (24), and a quick-change connecting plate (25). The quick-change connecting plate (25) is vertically installed on the side of the powder sample feeding bracket (2) away from the rotating electric gripper mechanism (11). The lifting cylinder (24) is installed on the side of the quick-change connecting plate (25) close to the rotating electric gripper mechanism (11) via the lifting cylinder mounting plate (23). The gripper cylinder mounting plate (21) is connected to the quick-change connecting plate (25) via the connecting plate (22). 2) Installed on the slide of the lifting cylinder (24), two claw cylinders (20) are symmetrically installed in the claw cylinder mounting plate (21). The claw assembly includes a first claw (17) and a second claw (18). The first claw (17) and the second claw (18) are both L-shaped plates and are arranged symmetrically at intervals. One section of the first claw (17) and the second claw (18) are respectively installed on the slide of the two claw cylinders (20) through two claw connecting plates (19). The other section of the first claw (17) and the second claw (18) are arranged in a circle on the opposite side and are used to clamp the body of the powder bottle (5).

8. The sample dispensing method of the powder dispensing quick-change device according to any one of claims 1-7, characterized in that, include: When the powder is added, the powder is located in the upper cavity of the powder bottle body (5) of the sealed powder bottle (6). The lifting cylinder (24) of the sliding cylinder lifting platform (15) controls the claw assembly to descend to the position of the powder bottle body (5). The two claw cylinders (20) control the claw assembly to clamp the sealed powder bottle (6). Then, the lifting cylinder (24) controls the claw assembly to rise, so that the limiting nut (13) moves into the electric claw assembly of the rotating electric claw mechanism (11) and is clamped. The lifting cylinder (24) controls the lifting of the powder bottle body (5), so that the conical stop (4) of the conical sealing screw (7) opens or closes the powder bottle outlet (3). When the powder bottle outlet (3) opens and the powder falls, the conical sealing screw (7) is rotated by the rotating electric claw mechanism (11), and then the screw is rotated to accelerate the powder falling.

Images