Powder chemical medicine metering device

Abstract

The invention relates to the field of metering devices, in particular to a powdery chemical medicine metering device which mainly comprises an electronic balance and a glass cover arranged at the top of the electronic balance, a side door is slidably connected to one side of the glass cover, a discharging assembly used for adding medicine is arranged on the glass cover, and a medicine storage tank used for containing the medicine is arranged at the upper end of the discharging assembly; an opening and closing triggering mechanism drives a baffle to move upwards, a bottom port of a medicine storage tank is opened, medicine flows into a material receiving groove, then the baffle is reset through the elasticity of a first elastic piece, the bottom port of the medicine storage tank is closed, a rotating handle is rotated to drive a ball to rotate, and the material receiving groove is in butt joint with a first discharging pipe through the effect of a positioning assembly; the medicine falls onto the weighing paper through the discharging pipe, the medicine adding process is completed, if medicine needs to be added again, the operation can be repeated, and compared with a traditional medicine spoon medicine adding mode, the medicine adding device is more convenient to operate, and the working efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of metering devices, specifically to a metering device for powdered chemicals. Background Technology

[0002] In chemical production or experiments, accurate material metering is crucial for ensuring product quality, reaction efficiency, and safety. This is especially true when handling powders and granules, where precise dosage control is often required based on specific formulations or reaction requirements. However, existing metering devices largely rely on manual operation, often necessitating repeated additions and removals to achieve the target dosage. This method is not only cumbersome and time-consuming but also prone to human error, impacting metering accuracy and production efficiency. Furthermore, manual intervention can lead to material loss or waste, further reducing production efficiency and resource utilization. Simultaneously, many chemicals and industrial chemicals possess toxicity or corrosiveness, posing a potential threat to operator health; prolonged exposure may cause occupational diseases or acute poisoning. Particularly during the handling of powders and granules, extremely fine dust can be inhaled, causing respiratory illnesses, and at high concentrations, may even lead to fires and explosions. Therefore, reliance on manual metering not only carries operational risks but also poses safety hazards to operators.

[0003] Currently, electronic balances are commonly used for accurate weighing of powdered chemicals. The specific procedure is relatively complex. First, the operator opens the door on the right side of the electronic balance and carefully places the weighing paper or weighing pan on the balance, ensuring that both the weighing pan and the weighing paper are clean and flat. Next, a tare operation is performed, which uses the balance's tare function to eliminate the weight of the weighing paper, ensuring that only the mass of the chemical being tested is measured.

[0004] After peeling, staff use a medicine spoon to take an appropriate amount of the medicine to be weighed from the storage container. At this point, to ensure that the medicine is added smoothly and accurately onto the weighing paper, staff usually gently tap the handle of the medicine spoon or lightly tap the spoon with the fingers of another hand to allow the medicine to fall gradually. This avoids inaccurate or uneven weighing due to the accumulation of medicine particles or static electricity. This process requires patience and skill to ensure that the amount of medicine is accurate until the balance shows the required weight of medicine.

[0005] Once the medicine has been added to the required weight, the staff will close the door on the right side of the balance and wait for the balance to stabilize. After stabilization, the staff will record the weighing value on the display screen to ensure the accuracy and completeness of the weighing data. Finally, the staff will open the door on the right side of the balance and carefully remove the weighed medicine.

[0006] However, the steps for adding medicine in this traditional weighing process are quite cumbersome, especially when using a medicine spoon. Because the operation is delicate and requires multiple adjustments and tapping, the weighing efficiency is often low. Furthermore, improper operation can easily lead to errors and affect the accuracy of the weighing. Summary of the Invention

[0007] In view of this, the purpose of this invention is to provide a powdered chemical metering device to solve the technical problem of the cumbersome drug addition steps in the current drug weighing process.

[0008] To achieve the above objectives, the present invention provides a powdered chemical metering device, comprising an electronic balance and a glass cover disposed on top of the electronic balance, wherein a side door is slidably connected to one side of the glass cover, and a feeding assembly for adding the chemical is provided on the glass cover, and a storage tank for placing the chemical is provided at the upper end of the feeding assembly. The feeding assembly includes a housing, with a sphere rotatably connected inside the housing. The upper and lower ends of the housing are open, and a first discharge pipe is connected to the lower opening. A receiving groove is provided on the outer side of the sphere, and two sets of receiving grooves are symmetrically provided. A rotating handle is provided on one side of the sphere, and the rotating handle is rotatably connected to the housing and extends to the outer side of the housing. The top of the medicine storage tank is threaded with a cover. The lower half of the medicine storage tank is a cone shape that is wider at the top and narrower at the bottom, and the bottom is open. A telescopic rod is provided inside the lower half of the tank. A first elastic element is sleeved on the outside of the telescopic rod. A baffle is connected to the telescopic end of the telescopic rod, and the baffle is adapted to the lower opening of the medicine storage tank. The sphere is equipped with an opening and closing trigger mechanism inside for driving the baffle to move upward.

[0009] Preferably, the sphere has a sliding cavity inside, and the opening and closing triggering mechanism includes a sliding rod slidably connected inside the sliding cavity, with two sets of sliding rods symmetrically arranged. A top rod slides through the inside of the rotating handle, with one end of the top rod extending into the sliding cavity. The lower end of the sliding rod is sloped, and one end of the sliding rod extends into the receiving groove. A second elastic element is provided on one side of the sliding rod, with one end of the second elastic element connected to the inside of the sliding cavity.

[0010] Preferably, the inside of the rotating handle is symmetrically provided with limiting grooves, and the outside of the top rod is symmetrically provided with limiting blocks, the limiting blocks being slidably connected to the inside of the limiting grooves.

[0011] Preferably, the upper end of the shell is provided with a fixing component for fixing the medicine storage tank.

[0012] Preferably, the lower outer side of the medicine storage tank is provided with symmetrical fitting blocks, and a groove is provided on one side of the fitting block; The fixing component includes a conical frame located on the top of the housing. The conical frame has symmetrically arranged matching grooves inside, which are adapted to the matching blocks. The outer side of the conical frame is slidably connected to a post, and two sets of posts are symmetrically arranged. One end of the post extends into the interior of the matching groove, and the end of the post is sloped. The other end of the post is provided with a circular plate. A fifth elastic element is sleeved on the outer side of the post. The two ends of the fifth elastic element are respectively connected to the circular plate and the conical frame.

[0013] Preferably, one side of the housing is provided with a positioning component for positioning the rotation angle of the sphere.

[0014] Preferably, the positioning component includes a fixing ring disposed on one side of the housing and a connecting ring disposed on the outer side of the ball. The fixing ring has symmetrically opened positioning holes inside, and the connecting ring has symmetrically opened inner cavities on the outer side. A ball is slidably connected inside the inner cavity, and a fourth elastic element is disposed inside the inner cavity. One end of the fourth elastic element is connected to the ball, and the ball is adapted to the positioning hole.

[0015] Preferably, the upper end of the glass cover is provided with a through hole, the outer side of the first discharge pipe is fixedly provided with an installation ring, the lower end of the installation ring is provided with a suction cup, and multiple sets of suction cups are provided at equal intervals along its circumference.

[0016] Preferably, a second discharge pipe is slidably connected to the outer side of the first discharge pipe, and a telescopic drive assembly for driving the second discharge pipe to move downward is provided on the outer side of the housing.

[0017] Preferably, the medicine storage tank is provided with a handle on the outside, and the telescopic drive assembly includes a fixing plate fixedly disposed on the outside of the housing. An L-shaped rod is slidably provided through the fixing plate. The lateral end of the L-shaped rod is connected to the second discharge pipe. The top of the L-shaped rod abuts against the handle. A fixing block is provided on one side of the L-shaped rod. A third elastic element is provided between the fixing block and the fixing plate.

[0018] The beneficial effects of this invention are: This invention uses an opening and closing trigger mechanism to drive the baffle to move upward, opening the bottom port of the medicine storage tank and allowing the medicine to flow into the receiving trough. Then, the elastic force of the first elastic element causes the baffle to reset, closing the bottom port of the medicine storage tank. Next, rotating the handle drives the ball to rotate, and the positioning component connects the receiving trough to the first discharge pipe. The medicine falls through the discharge pipe onto the weighing paper, completing the medicine addition process. If medicine needs to be added again, the above operation can be repeated. Compared with the traditional medicine spoon method, this invention is more convenient to operate and effectively improves work efficiency. In addition, the combination of the fixing component and the medicine storage tank facilitates the replacement of medicine storage tanks containing different medicines. Furthermore, during the process of connecting the medicine storage tank to the shell, the handle, in conjunction with the telescopic drive component, reduces the gap between the second discharge pipe and the weighing paper, preventing deviation when the medicine falls and further ensuring weighing accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 This is a schematic diagram of the shell structure of the present invention; Figure 4 This is a schematic diagram of the structure of the first and second discharge pipes of the present invention; Figure 5 This is a schematic diagram of the sphere and rotating handle structure of the present invention; Figure 6 This is a cross-sectional view of the medicine storage tank of the present invention; Figure 7 for Figure 5 Exploded view; Figure 8 This is a cross-sectional view of the rotating handle of the present invention; Figure 9 This is a schematic diagram of the telescopic drive component structure of the present invention; Figure 10 for Figure 9 Exploded view; Figure 11 for Figure 8 Enlarged view of point A in the middle; Figure 12 for Figure 10 Enlarged view at point B in the middle; Figure 13 This is a schematic diagram of the fixed component structure of the present invention; The numbers on the map are: 1. Electronic balance; 11. Glass cover; 111. Side door; 112. Through hole; 2. Feeding assembly; 21. Housing; 22. Ball; 221. Receiving groove; 222. Rotating handle; 2221. Limiting groove; 223. Sliding cavity; 23. First discharge pipe; 231. Mounting ring; 232. Suction cup; 24. Second discharge pipe; 25. Opening and closing triggering mechanism; 251. Top rod; 2511. Limiting block; 252. Sliding rod; 253. Second elastic element; 26. Positioning assembly; 261. Fixing ring; 26 2. Positioning hole; 263. Connecting ring; 264. Inner cavity; 265. Ball bearing; 266. Fourth elastic element; 3. Medicine storage container; 31. Cover; 32. Telescopic rod; 33. First elastic element; 34. Baffle; 35. Fitting block; 351. Groove; 36. Handle; 4. Fixing assembly; 41. Conical frame; 42. Fitting groove; 43. Insert post; 44. Round plate; 45. Fifth elastic element; 5. Telescopic drive assembly; 51. Fixing plate; 52. L-shaped rod; 521. Fixing block; 522. Third elastic element. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] This invention proposes a metering device for powdered chemicals, such as... Figures 1 to 10 As shown, it includes an electronic balance 1 and a glass cover 11 located on top of the electronic balance 1. A side door 111 is slidably connected to one side of the glass cover 11. A feeding assembly 2 for adding medicine is provided on the glass cover 11. A medicine storage tank 3 for placing medicine is provided at the upper end of the feeding assembly 2. The feeding assembly 2 includes a housing 21, with a ball 22 rotatably connected inside the housing 21. The upper and lower ends of the housing 21 are open, and a first discharge pipe 23 is connected to the lower end opening. A receiving groove 221 is provided on the outer side of the ball 22, and two sets of receiving grooves 221 are symmetrically provided. A rotating handle 222 is provided on one side of the ball 22, and the rotating handle 222 is rotatably connected to the housing 21 and extends to the outside of the housing 21. The top of the medicine storage tank 3 is threaded with a cover 31. The lower half of the medicine storage tank 3 is a cone shape that is wider at the top and narrower at the bottom, and the bottom is open. A telescopic rod 32 is provided inside the lower half. A first elastic element 33 is sleeved on the outside of the telescopic rod 32. A baffle 34 is connected to the telescopic end of the telescopic rod 32. The baffle 34 is adapted to the lower opening of the medicine storage tank 3. The inside of the sphere 22 is provided with an opening and closing trigger mechanism 25 for driving the baffle 34 to move upward.

[0024] In this example, when weighing powdered chemicals, the top cover 31 of the storage tank 3 is first unscrewed, the medicine is placed inside the storage tank 3, and then the cover 31 is tightened back onto the storage tank 3. Then, the side door 111 on one side of the glass cover 11 is opened, and the weighing paper is placed on the electronic balance 1. The side door 111 is then closed. At this time, the opening / closing trigger mechanism 25 drives the baffle 34 to move upward. Since the lower half of the storage tank 3 is a cone shape that is wider at the top and narrower at the bottom, when the baffle 34 moves upward, the bottom port of the storage tank 3 is opened, and the medicine inside the storage tank 3 falls into a set of receiving troughs 221 at the upper end of the sphere 22. When the baffle 34 moves upward, the telescopic rod 32 contracts and the first elastic element 33 deforms. Then, the elastic force of the first elastic element 33 causes the lower baffle 34 to reset, closing the bottom port of the storage tank 3. After closing, by rotating the handle 222, the ball 22 is rotated 180 degrees, allowing the receiving trough 221, which already contains medicine, to rotate to align with the first discharge pipe 23. At this time, the medicine inside the receiving trough 221 falls through the first discharge pipe 23 onto the weighing paper on the electronic balance 1, completing one medicine addition process. When medicine needs to be added again, the baffle 34 is moved upward by the opening and closing trigger mechanism 25, allowing the medicine inside the medicine storage tank 3 to fall into the receiving trough 221. The ball 22 is rotated 180 degrees again by rotating the handle 222, allowing the medicine inside the receiving trough 221 to fall through the first discharge pipe 23 onto the weighing paper again. The above operation can be repeated according to the actual weighing mass. Compared with the current method of adding medicine using a medicine spoon, this is more convenient and can effectively improve work efficiency.

[0025] As one example, such as Figure 6 As shown, further details are as follows: The ball 22 has a sliding cavity 223 inside. The opening and closing triggering mechanism 25 includes a sliding rod 252 that is slidably connected inside the sliding cavity 223. Two sets of sliding rods 252 are symmetrically arranged. A top rod 251 slides through the inside of the rotating handle 222. One end of the top rod 251 extends into the inside of the sliding cavity 223. The lower end of the sliding rod 252 is sloping. One end of the sliding rod 252 extends into the receiving groove 221. A second elastic element 253 is provided on one side of the sliding rod 252. One end of the second elastic element 253 is connected to the inside of the sliding cavity 223.

[0026] In this embodiment, when it is necessary to open the bottom port of the medicine storage tank 3 so that the medicine inside can fall into the receiving trough 221, the operator manually squeezes the top rod 251 to move it into the sliding cavity 223. Since the contact end between the sliding rod 252 and the top rod 251 is sloped, when the top rod 251 squeezes the sliding rod 252, the sliding rod 252 slides along the inside of the sliding cavity 223, causing one end of the sliding rod 252 to extend into the receiving trough 221 and push the baffle 34 to move upward. During the movement of the sliding rod 252, the second elastic element 253 deforms. Therefore, when the operator no longer applies external force to the top rod 251, the sliding rod 252 is reset by the elastic force of the second elastic element 253, and the top rod 251 is reset. Combined with the elastic force of the first elastic element 33 on the baffle 34, the baffle 34 closes the bottom port of the medicine storage tank 3 again, preventing the medicine from falling out of the bottom port of the medicine storage tank 3 when the handle 222 is turned, and further avoiding medicine waste.

[0027] As one example, such as Figure 6 As shown, further details are as follows: The inside of the rotating handle 222 is symmetrically provided with a limiting groove 2221, and the outside of the push rod 251 is symmetrically provided with a limiting block 2511, which is slidably connected to the inside of the limiting groove 2221.

[0028] In this embodiment, when the push rod 251 moves, the limiting block 2511 moves along the inside of the limiting groove 2221. The connection between the limiting block 2511 and the limiting groove 2221 prevents the push rod 251 from moving too far and causing it to disengage from the rotating handle 222.

[0029] As one example, such as Figure 6 and Figure 13 As shown, further details are as follows: The upper end of the shell 21 is provided with a fixing component 4 for fixing the medicine storage tank 3; A fitting block 35 is symmetrically provided on the outer side of the lower end of the medicine storage tank 3, and a groove 351 is provided on one side of the fitting block 35; The fixing component 4 includes a conical frame 41 located on the top of the housing 21. The interior of the conical frame 41 is symmetrically provided with mating grooves 42 that are adapted to the mating block 35. The outer side of the conical frame 41 is slidably connected with a post 43, and two sets of posts 43 are symmetrically provided. One end of the post 43 extends into the interior of the mating groove 42, and the end of the post 43 is sloped. The other end of the post 43 is provided with a circular plate 44. A fifth elastic member 45 is sleeved on the outer side of the post 43. The two ends of the fifth elastic member 45 are respectively connected to the circular plate 44 and the conical frame 41.

[0030] In this embodiment, when connecting the medicine storage tank 3 to the shell 21, the fitting block 35 on the outer side of the lower end of the medicine storage tank 3 is aligned with the fitting groove 42 of the conical frame 41 and inserted. Since the end of the insertion post 43 is sloped, the insertion post 43 will be squeezed when the fitting block 35 is inserted into the fitting groove 42, causing the insertion post 43 to move the circular plate 44 and deform the fifth elastic element 45. When the fitting block 35 is inside the fitting groove 42, the circular plate 44 drives the insertion post 43 to insert into the groove 351 on the outer side of the fitting block 35 under the elastic force of the fifth elastic element 45, thus fixing the medicine storage tank 3 and enabling a stable connection between the medicine storage tank 3 and the shell 21. When it is necessary to change different chemicals for weighing, it is only necessary to pull the circular plate 44 outward to separate the insertion post 43 from the groove 351 and lift the medicine storage tank 3 upward to replace the medicine storage tank 3 containing different chemicals, which can improve work efficiency.

[0031] As one example, such as Figures 8 to 12 As shown, further details are as follows: A positioning component 26 for positioning the rotation angle of the ball 22 is provided on one side of the housing 21; The positioning component 26 includes a fixing ring 261 located on one side of the housing 21 and a connecting ring 263 located on the outside of the ball 22. The fixing ring 261 has symmetrically opened positioning holes 262 inside, and the connecting ring 263 has symmetrically opened inner cavities 264 on the outside. A ball 265 is slidably connected inside the inner cavity 264. A fourth elastic element 266 is provided inside the inner cavity 264. One end of the fourth elastic element 266 is connected to the ball 265, and the ball 265 is adapted to the positioning hole 262.

[0032] In this embodiment, when the ball 22 is rotated by the rotating handle 222, the connecting ring 263 rotates inside the fixed ring 261, and the ball 265 is squeezed by the inner wall of the fixed ring 261, so that the fourth elastic element 266 is squeezed. When the ball 22 rotates 180 degrees, the ball 265 can be placed inside the positioning hole 262 under the elastic force of the fourth elastic element 266. At this time, the two sets of receiving grooves 221 on the ball 22 correspond to the top and bottom ports of the housing 21 respectively. The ball 265 and the positioning hole 262 can provide a certain damping feeling to prevent the receiving groove 221 from shifting when receiving medicine or letting the medicine fall into the first discharge pipe 23.

[0033] As one example, such as Figure 2 and Figure 4 As shown, further details are as follows: The upper end of the glass cover 11 is provided with a through hole 112, and the outer side of the first discharge pipe 23 is fixedly provided with an installation ring 231. The lower end of the installation ring 231 is provided with a suction cup 232, and multiple sets of suction cups 232 are provided at equal intervals along its circumference.

[0034] In this embodiment, the top through hole 112 of the glass cover 11 is used for the first discharge pipe 23 to pass through, so that the first discharge pipe 23 can be placed inside the glass cover 11. With the setting of multiple sets of suction cups 232, the first discharge pipe 23 and the housing 21 can be stably installed on the glass cover 11, further ensuring the stability during operation.

[0035] As one example, such as Figure 4 , Figure 6 and Figure 9 As shown, further details are as follows: The outer side of the first discharge pipe 23 is slidably connected to the second discharge pipe 24, and the outer side of the housing 21 is provided with a telescopic drive assembly 5 for driving the second discharge pipe 24 to move downward. The medicine storage tank 3 has a handle 36 on its outer side. The telescopic drive assembly 5 includes a fixing plate 51 fixedly installed on the outer side of the housing 21. An L-shaped rod 52 is slidably installed on the fixing plate 51. The lateral end of the L-shaped rod 52 is connected to the second discharge pipe 24. The top of the L-shaped rod 52 abuts against the handle 36. A fixing block 521 is provided on one side of the L-shaped rod 52. A third elastic member 522 is provided between the fixing block 521 and the fixing plate 51.

[0036] In this embodiment, during the installation of the medicine storage tank 3 onto the housing 21, as the medicine storage tank 3 moves downward along the inside of the conical frame 41, the handle 36 on one side of the medicine storage tank 3 presses down the L-shaped rod 52, causing the L-shaped rod 52 to drive the second discharge pipe 24 downward, reducing the distance between it and the weighing paper. This allows the medicine to reach the weighing paper through the inside of the first discharge pipe 23 and the second discharge pipe 24, preventing the medicine from deviating when falling due to an excessive distance between the first discharge pipe 23 and the weighing paper, further avoiding waste of medicine. When the L-shaped rod 52 moves downward, it drives the fixing block 521 downward, causing the third elastic element 522 to deform. When the medicine storage tank 3 separates from the housing 21, the handle 36 separates from the top of the L-shaped rod 52, and the second discharge pipe 24 is reset under the elastic force of the third elastic element 522, reducing the overall space occupied, which is convenient for subsequent disassembly and other operations.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0038] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A metering device for powdered chemicals, comprising an electronic balance (1) and a glass cover (11) disposed on top of the electronic balance (1), wherein a side door (111) is slidably connected to one side of the glass cover (11), characterized in that, The glass cover (11) is provided with a feeding assembly (2) for adding medicines, and the upper end of the feeding assembly (2) is provided with a medicine storage tank (3) for placing medicines. The feeding assembly (2) includes a housing (21), and a ball (22) is rotatably connected inside the housing (21). The upper and lower ends of the housing (21) are open, and a first discharge pipe (23) is connected to the lower end opening. A receiving groove (221) is provided on the outer side of the ball (22), and two sets of receiving grooves (221) are symmetrically provided. A rotating handle (222) is provided on one side of the ball (22), and the rotating handle (222) is rotatably connected to the housing (21) and extends to the outside of the housing (21). The top of the medicine storage tank (3) is threaded with a cover (31). The lower half of the medicine storage tank (3) is a cone shape that is wider at the top and narrower at the bottom, and the bottom is open. A telescopic rod (32) is provided inside the lower half. A first elastic element (33) is sleeved on the outside of the telescopic rod (32). A baffle (34) is connected to the telescopic end of the telescopic rod (32). The baffle (34) is adapted to the lower opening of the medicine storage tank (3). The sphere (22) is provided with an opening and closing triggering mechanism (25) for driving the baffle (34) to move upward.

2. The powdered chemical metering device according to claim 1, characterized in that, The sphere (22) has a sliding cavity (223) inside. The opening and closing triggering mechanism (25) includes a sliding rod (252) slidably connected inside the sliding cavity (223). Two sets of sliding rods (252) are symmetrically arranged. A top rod (251) slides through the inside of the rotating handle (222). One end of the top rod (251) extends into the sliding cavity (223). The lower end of the sliding rod (252) is sloped. One end of the sliding rod (252) extends into the receiving groove (221). A second elastic element (253) is provided on one side of the sliding rod (252). One end of the second elastic element (253) is connected to the inside of the sliding cavity (223).

3. The powdered chemical metering device according to claim 2, characterized in that, The rotating handle (222) has symmetrically provided limiting grooves (2221) inside, and the top rod (251) has symmetrically provided limiting blocks (2511) on the outside. The limiting blocks (2511) are slidably connected to the inside of the limiting grooves (2221).

4. The powdered chemical metering device according to claim 1, characterized in that, The upper end of the shell (21) is provided with a fixing component (4) for fixing the medicine storage tank (3).

5. A powdered chemical metering device according to claim 4, characterized in that, The lower outer side of the medicine storage tank (3) is symmetrically provided with a fitting block (35), and a groove (351) is provided on one side of the fitting block (35). The fixing component (4) includes a conical frame (41) located on the top of the housing (21). The conical frame (41) has symmetrically provided fitting grooves (42) that are adapted to the fitting block (35). The outer side of the conical frame (41) is slidably connected to a post (43), and two sets of posts (43) are symmetrically provided. One end of the post (43) extends into the interior of the fitting groove (42), and the end of the post (43) is sloped. The other end of the post (43) is provided with a circular plate (44). A fifth elastic element (45) is sleeved on the outer side of the post (43). The two ends of the fifth elastic element (45) are respectively connected to the circular plate (44) and the conical frame (41).

6. A powdered chemical metering device according to claim 1, characterized in that, A positioning component (26) for positioning the rotation angle of the sphere (22) is provided on one side of the housing (21).

7. A powdered chemical metering device according to claim 6, characterized in that, The positioning component (26) includes a fixing ring (261) on one side of the housing (21) and a connecting ring (263) on the outside of the sphere (22). The fixing ring (261) has symmetrically opened positioning holes (262) inside. The connecting ring (263) has symmetrically opened inner cavities (264) on the outside. A ball (265) is slidably connected inside the inner cavity (264). A fourth elastic element (266) is provided inside the inner cavity (264). One end of the fourth elastic element (266) is connected to the ball (265). The ball (265) is adapted to the positioning hole (262).

8. A powdered chemical metering device according to claim 1, characterized in that, The upper end of the glass cover (11) is provided with a through hole (112), and the outer side of the first discharge pipe (23) is fixedly provided with an installation ring (231). The lower end of the installation ring (231) is provided with a suction cup (232), and multiple sets of suction cups (232) are provided at equal intervals along its circumference.

9. A powdered chemical metering device according to claim 8, characterized in that, The outer side of the first discharge pipe (23) is slidably connected to the second discharge pipe (24), and the outer side of the housing (21) is provided with a telescopic drive assembly (5) for driving the second discharge pipe (24) to move downward.

10. A powdered chemical metering device according to claim 9, characterized in that, The medicine storage tank (3) is provided with a handle (36) on the outside. The telescopic drive assembly (5) includes a fixing plate (51) fixedly disposed on the outside of the housing (21). An L-shaped rod (52) is slidably disposed on the fixing plate (51). The lateral end of the L-shaped rod (52) is connected to the second discharge pipe (24). The top of the L-shaped rod (52) abuts against the handle (36). A fixing block (521) is provided on one side of the L-shaped rod (52). A third elastic element (522) is provided between the fixing block (521) and the fixing plate (51).

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