A chemical raw material powder weighing system

Abstract

The present invention relates to the field of chemical metering, and in particular to a chemical raw material powder weighing system. Aiming at the problem that the chemical raw material powder weighing device in the prior art is inconvenient to handle dust and cannot handle agglomerated raw materials in time, the following scheme is proposed, which includes a material storage part and a weighing part, the material storage part includes a mounting frame and a storage tank installed on the top of the mounting frame, the weighing part includes a screening mechanism, a dust suction mechanism, a discharge mechanism and a weighing mechanism; the discharge mechanism includes a bottom plate, a mounting plate rotatably connected to the top surface of the bottom plate through a support shaft, two material support assemblies installed on the mounting plate, and a steering assembly installed on the bottom plate for driving the mounting plate to rotate, the material support assembly is used to place a material barrel, and the positions of the two material support assemblies are exchanged, so as to facilitate the loading and unloading of the material barrel. The present invention can crush the agglomerated part of the raw material in time, and can also effectively avoid the flying of dust during the weighing process, and also makes the loading and unloading of the raw materials after weighing more labor-saving.

Description

Technical Field

[0001] The invention relates to the field of chemical metering, and in particular to a chemical raw material powder weighing system. Background Art

[0002] In the chemical reaction process, the larger the contact area, the faster the reaction speed. Therefore, powdered chemical raw materials are common in chemical production. Before use, the powder needs to be accurately weighed to determine its weight before the next step of production can be carried out.

[0003] The weighing device in the prior art usually places a container for holding powder on the weighing device, and then adds powder to the container to complete the weighing. However, since powdered chemical raw materials are very likely to have dust floating during the weighing process, directly pouring the materials for weighing can easily lead to the loss of raw materials and affect the air quality in the working environment. Moreover, the raw materials may also agglomerate due to moisture during the transportation process. The weighing device in the prior art cannot crush the agglomerated raw materials in time during the weighing process. For this reason, this scheme proposes a chemical raw material powder weighing system. Summary of the invention

[0004] The invention provides a chemical raw material powder weighing system, which solves the problems in the prior art that the chemical raw material powder weighing device is inconvenient to handle dust and cannot handle agglomerated raw materials in time.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A chemical raw material powder weighing system comprises a material storage part and a weighing part, wherein the material storage part comprises a mounting frame and a storage tank mounted on the top of the mounting frame, and the weighing part comprises a material screening mechanism, a dust collecting mechanism, a material discharging mechanism and a weighing mechanism;

[0007] The material discharging mechanism comprises a bottom plate, a mounting plate rotatably connected to the top surface of the bottom plate through a support shaft, two material supporting assemblies mounted on the mounting plate, and a steering assembly mounted on the bottom plate for driving the mounting plate to rotate;

[0008] The weighing mechanism comprises a placement plate mounted on the bottom plate via a first telescopic member and an electronic scale mounted on the top surface of the placement plate;

[0009] The screening mechanism comprises a processing tank installed on the top of the base plate, a crushing assembly installed in the processing tank, a discharge pipe installed at the bottom of the processing tank and a sealing cover installed at the bottom of the discharge pipe, a feed pipe connected to the storage tank is installed on the top of the processing tank, the crushing assembly comprises a rotating shaft rotatably connected to the center of the top of the processing tank, a pressure roller rotatably connected to the outer periphery of the rotating shaft, a screen rotatably sleeved on the outer periphery of the rotating shaft and a linkage member installed on the processing tank and used to drive the screen to reciprocate, the outer ring of the screen is rotatably connected to the inner ring of the processing tank, the pressure roller is located on the top surface of the screen and cooperates with it, the bottom of the rotating shaft extends into the discharge pipe and is fixedly connected with an auger, the outer periphery of the auger is fixed with a scraper that fits the inner wall of the sealing cover, an air suction hole is opened on the sealing cover, a filter is installed in the air suction hole, and the linkage is drivingly connected with the rotating shaft;

[0010] The dust suction mechanism comprises an air suction component installed on the outer periphery of the processing tank and an air suction pipe used for connecting the air suction component with the air suction hole.

[0011] Through the above technical solution, not only can the agglomerated parts in the raw materials be crushed in time, but also the problem of dust flying during the weighing process can be effectively avoided, and the loading and unloading of the raw materials after weighing can be made more labor-saving.

[0012] As a further improvement of the above scheme, the processing tank is a cylindrical structure, and the inner ring of the processing tank is provided with a tooth groove coaxially arranged therewith, and one end of the pressure roller is fixed with a fixed gear coaxially arranged therewith, and the fixed gear is located in the tooth groove and meshed therewith.

[0013] Through the above technical solution, the pressure roller can be driven to rotate while following the revolution of the rotating shaft.

[0014] As a further improvement of the above scheme, a gear ring coaxially arranged therewith is fixed to the bottom surface of the screen, and the linkage member includes a connecting shaft rotatably connected to the inner wall of the processing tank, a transmission gear fixed to one end of the connecting shaft, and a transmission member installed on the processing tank for driving the connecting shaft to rotate reciprocally, and the transmission gear is located at the bottom of the gear ring and meshes with it.

[0015] Through the above technical solution, after starting the reciprocating rotation of the connecting shaft, the outside of the screen can be driven to reciprocate, thereby achieving the purpose of screening materials.

[0016] As a further improvement of the above scheme, the other end of the connecting shaft extends to the outside of the processing tank and is fixed with a linkage gear. The transmission member includes a transmission shaft rotatably connected to the top of the processing tank, a crankshaft rotatably connected to the outer periphery of the processing tank, a connecting sleeve movably sleeved on the outer periphery of the connecting rod journal of the crankshaft, a connecting rod fixed on the outer periphery of the connecting sleeve, a linkage rack hinged at the other end of the connecting rod, and a limiter installed on the outer periphery of the linkage rack. One end of the transmission shaft is transmission-connected to the rotating shaft, the linkage rack is meshed with the linkage gear, and a main shaft of the crankshaft is connected to the other end of the transmission shaft through a first belt transmission.

[0017] Through the above technical solution, the transmission shaft can be mobilized to rotate while the rotating shaft rotates, and then the crankshaft is driven to rotate by the rotation of the transmission shaft, and finally the purpose of driving the connecting shaft to rotate reciprocally is achieved.

[0018] As a further improvement of the above solution, the limiting member includes a limiting sleeve movably mounted on the outer periphery of the linkage rack and a fixing rod fixed between the outer periphery of the limiting sleeve and the outer periphery of the processing tank.

[0019] Through the above technical solution, the stability of the meshing between the linkage rack and the linkage gear can be maintained.

[0020] As a further improvement of the above scheme, the air intake assembly includes a shell installed on the outer periphery of the processing tank, a fixed shaft rotatably connected to the shell, and an exhaust fan fixed to one end of the fixed shaft, and the other end of the fixed shaft extends outside the shell and is connected to the other main shaft of the crankshaft through a second belt drive.

[0021] Through the above technical solution, the fixed shaft can be driven to rotate while the crankshaft rotates, thereby driving the exhaust fan to rotate.

[0022] As a further improvement of the above solution, a concave hole for accommodating the weighing mechanism is provided on the top surface of the bottom plate, and the concave hole is located directly below the sealing plate. The number of the first telescopic members is set to 2-3 groups.

[0023] The above technical solution can prevent the weighing mechanism from being exposed when not in use.

[0024] As a further improvement of the above scheme, the two support assemblies are respectively installed on both sides of the mounting plate, and the support assemblies include two support plates fixed on the side edges of the mounting plate, a fixed plate fixed between the two support plates, and a positioning plate fixed on the outer wall of the fixed plate on the side away from the mounting plate. The spacing between the two support plates is greater than the diameter of the placement plate. A fixing column is installed at the bottom of the support plate, and a ball bearing that abuts against the top surface of the base plate is installed at the bottom of the fixing column.

[0025] Through the above technical solution, the support plate is supported by the fixed column, and the distance between the two support plates is greater than the diameter of the placement plate, which makes it easier for the placement plate to pass through the gap between the two support plates.

[0026] As a further improvement of the above solution, a plurality of mounting grooves are provided on the top surface of the support plate, and rollers are installed in the mounting grooves.

[0027] Through the above technical solution, the resistance of the material bucket when it moves on the supporting plate can be reduced.

[0028] As a further improvement of the above solution, the steering assembly includes a second telescopic member installed on the top surface of the base plate, a steering rack fixed at the output end of the second telescopic member, and a steering gear sleeved on the outer periphery of the support shaft and meshing with the steering rack.

[0029] Through the above technical solution, the extension and retraction of the second telescopic member can be utilized to drive the support shaft to rotate, thereby completing the position exchange between the two supporting components.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. Through the cooperation among the material storage part, the screening mechanism and the dust collecting mechanism, the agglomerated part of the divided material can be crushed before the powder falls into the material holding barrel, and the floating dust can be adsorbed on the surface of the filter screen by means of suction during the process of the powder falling into the material holding barrel, and then scraped off in a centralized manner, thereby effectively avoiding the dust flying after the sealing cover is opened, thereby reducing the loss of raw materials and the air pollution to the working environment.

[0032] 2. Through the cooperation between the weighing mechanism and the discharging mechanism, the empty material barrel can be conveniently sent to the bottom of the screening mechanism and placed above the weighing mechanism. Then, the weighing mechanism can lift the material barrel to weigh the raw materials in the material barrel. The material barrel filled with raw materials can also be swapped with the empty material barrel, which saves time and effort and helps to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the schematic diagram of the weighing unit;

[0034] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0035] Figure 3 for Figure 1 Structural diagram of the middle screening mechanism;

[0036] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0037] Figure 5 It is a cross-sectional view of the filter screen, tooth groove, gear ring, slide groove and slider;

[0038] Figure 6A cross-sectional view of the processing tank, the discharge pipe and the sealing cover;

[0039] Figure 7 It is a structural schematic diagram of the unloading mechanism;

[0040] Figure 8 It is a schematic diagram of the bottom structure of the unloading mechanism;

[0041] Fig. 9 It is a schematic diagram of the structure of the present invention.

[0042] Description of main symbols:

[0043] 1. Bottom plate; 2. Processing tank; 3. Feed pipe; 4. Transmission shaft; 5. Shell; 6. Suction pipe; 7. Discharge pipe; 8. Material bucket; 9. Mounting plate; 10. Positioning plate; 11. Fixed plate; 12. Support plate; 13. Linkage gear; 14. Connecting shaft; 15. Crankshaft; 16. Connecting rod; 17. Fixed shaft; 18. Connecting sleeve; 19. Limit sleeve; 20. Linkage rack; 21. Sealing cover; 22. Screen; 23. Tooth groove; 24. Press roller; 25. Fixed gear; 26. Exhaust fan; 27. Slide; 28. Slider; 29. ​​Ring gear; 30. Rotating shaft; 31. Transmission gear; 32. Scraper; 33. Suction hole; 34. Auger; 35. Placement plate; 36. Concave hole; 37. First telescopic member; 38. Roller; 39. Electronic scale; 40. Fixed column; 41. Steering rack; 42. Steering gear; 43. Second telescopic member; 44. Support shaft; 45. Mounting frame; 46. Storage tank. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0045] Example 1

[0046] Please combine Figure 1 - Fig. 9 A chemical raw material powder weighing system of this embodiment includes a material storage part and a weighing part. The material storage part includes a mounting frame 45 and a storage tank 46 installed on the top of the mounting frame 45. The storage tank 46 is used to store chemical raw materials and discharge them when used. The weighing part includes a screening mechanism, a dust suction mechanism, a discharge mechanism and a weighing mechanism.

[0047] The material discharge mechanism includes a base plate 1, a mounting plate 9 rotatably connected to the top surface of the base plate 1 through a support shaft 44, two material support assemblies mounted on the mounting plate 9, and a steering assembly mounted on the base plate 1 for driving the mounting plate 9 to rotate. The two material support assemblies are respectively mounted on both sides of the mounting plate 9, and the material support assembly includes two support plates 12 fixed on the side edges of the mounting plate 9, a fixed plate 11 fixed between the two support plates 12, and a positioning plate 10 fixed on the outer wall of the fixed plate 11 away from the mounting plate 9. A fixing column 40 is installed at the bottom of the support plate 12, and a ball bearing abutting against the top surface of the base plate 1 is installed at the bottom of the fixing column 40. When weighing, place the material bucket 8 on the top of the two support plates 12 of a material support assembly, and make one side of the material bucket 8 abut against the positioning plate 10.

[0048] The steering assembly includes a second telescopic member 43 installed on the top surface of the base plate 1, a steering rack 41 fixed at the output end of the second telescopic member 43, and a steering gear 42 sleeved on the outer periphery of the support shaft 44 and meshing with the steering rack 41. The tops of the two material supporting assemblies can be used to place the material bucket 8. The mounting plate 9 is driven to rotate by the steering mechanism to swap the positions of the two material supporting assemblies, and then the positions of the two material buckets 8 can be swapped.

[0049] The weighing mechanism includes a placement plate 35 installed on the base plate 1 through a first telescopic member 37 and an electronic scale 39 installed on the top surface of the placement plate 35. The top surface of the base plate 1 is provided with a recessed hole 36 for accommodating the weighing mechanism. The recessed hole 36 is located directly below the sealing cover 21. The number of first telescopic members 37 is set to 2-3 groups. The distance between the two support plates 12 is greater than the diameter of the placement plate 35. After the material barrel 8 is rotated to the top of the electronic scale 39, the first telescopic member 37 is extended to lift the electronic scale 39 until the electronic scale 39 lifts the material barrel 8 and breaks contact with the support plate 12, so that the electronic scale 39 can be used to measure the weight of the raw materials in the material barrel 8.

[0050] The screening mechanism includes a processing tank 2 mounted on the top of the bottom plate 1, a crushing assembly mounted in the processing tank 2, a discharge pipe 7 mounted at the bottom of the processing tank 2, and a sealing cover 21 mounted at the bottom of the discharge pipe 7. A feed pipe 3 connected to the storage tank 46 is mounted on the top of the processing tank 2. The crushing assembly includes a rotating shaft 30 rotatably connected to the center of the top of the processing tank 2, a pressure roller 24 rotatably connected to the outer periphery of the rotating shaft 30, a screen 22 rotatably sleeved on the outer periphery of the rotating shaft 30, and a screen 22 mounted on the processing tank 2 and used for The linkage part drives the screen 22 to rotate reciprocatingly, and the outer ring of the screen 22 is rotatably connected to the inner ring of the processing tank 2. The pressure roller 24 is located on the top surface of the screen 22 and cooperates with it. A motor for driving the rotating shaft 30 to rotate is installed on the top of the processing tank 2. The raw materials fall into the processing tank 2 from the discharge pipe 7. After the rotating shaft 30 rotates, the pressure roller 24 will crush the divided materials falling on the top surface of the screen 22, thereby crushing the agglomerated divided materials, and the crushed divided materials fall under the screen and are discharged from the discharge pipe 7.

[0051] The inner circle of the processing tank 2 is provided with a slide groove 27 coaxially arranged therewith, and the outer periphery of the screen 22 is sleeved with a slider 28 coaxially arranged therewith. The outer circle of the slider 28 extends into the slide groove 27 and slides therewith, so that the screen 22 can rotate inside the processing tank 2 with the axis as the rotation center.

[0052] The linkage is connected to the rotating shaft 30 for transmission, and a gear ring 29 coaxially arranged therewith is fixed to the bottom surface of the screen 22. The linkage includes a connecting shaft 14 rotatably connected to the inner wall of the processing tank 2, a transmission gear 31 fixed to one end of the connecting shaft 14, and a transmission member installed on the processing tank 2 for driving the connecting shaft 14 to rotate reciprocally. The transmission gear 31 is located at the bottom of the gear ring 29 and meshes with it. After reciprocating rotation, the connecting shaft 14 will drive the gear ring 29 to rotate reciprocally through the transmission gear 31, thereby driving the screen 22 to rotate reciprocally, so that the powder falling on the screen 22 can fall faster, thereby achieving the purpose of screening.

[0053] The other end of the connecting shaft 14 extends to the outside of the processing tank 2 and is fixed with a linkage gear 13. The transmission parts include a transmission shaft 4 rotatably connected to the top of the processing tank 2, a crankshaft 15 rotatably connected to the outer periphery of the processing tank 2, a connecting sleeve 18 movably sleeved on the outer periphery of the connecting rod journal of the crankshaft, a connecting rod 16 fixed on the outer periphery of the connecting sleeve 18, a linkage rack 20 hinged at the other end of the connecting rod 16, and a limiter installed on the outer periphery of the linkage rack 20. A driven bevel gear is fixed to one end of the transmission shaft 4, and an active bevel gear meshing with the driven bevel gear is sleeved on the outer periphery of the rotating shaft 30. The linkage rack 20 meshes with the linkage gear 13. A main shaft of the crankshaft 15 is connected to the other end of the transmission shaft 4 through a first belt transmission. After the rotating shaft 30 rotates, the transmission shaft 4 is mobilized to rotate, and the transmission shaft 4 then drives the crankshaft 15 to rotate through the first belt. After the crankshaft 15 rotates, it can drive the linkage rack 20 to move up and down reciprocatingly, thereby achieving the purpose of driving the linkage gear 13 to rotate reciprocatingly.

[0054] The limiting member includes a limiting sleeve 19 which is movablely sleeved on the periphery of the linkage rack 20 and a fixing rod fixed between the periphery of the limiting sleeve 19 and the periphery of the processing tank 2. Under the restriction of the limiting sleeve 19, the linkage rack 20 can always mesh with the linkage gear 13.

[0055] The bottom of the rotating shaft 30 extends into the discharge pipe 7 and is fixedly connected to an auger 34. A scraper 32 is fixed to the outer periphery of the auger 34 and is in contact with the inner wall of the sealing cover 21. An air suction hole 33 is provided on the sealing cover 21, and a filter screen is installed in the air suction hole 33. When the rotating shaft 30 rotates, the auger 34 is driven to rotate synchronously, which can not only prevent the discharge pipe 7 from being blocked, but also cut off the raw materials in the discharge pipe 7 to prevent the raw materials from continuing to be discharged from the discharge pipe 7 when the weight of the raw materials in the material barrel 8 reaches the standard. Moreover, the scraper 32 can scrape off the raw materials attached to the inner wall of the sealing cover 21 and the filter screen after rotating with the auger 34.

[0056] The dust suction mechanism includes an air suction component installed on the periphery of the processing tank 2 and an air suction pipe 6 for connecting the air suction component with the air suction hole 33. The air suction component includes an outer shell 5 installed on the periphery of the processing tank 2, a fixed shaft 17 rotatably connected in the outer shell 5, and an exhaust fan 26 fixed at one end of the fixed shaft 17. The other end of the fixed shaft 17 extends to the outside of the outer shell 5 and is connected to the other main shaft of the crankshaft 15 through a second belt drive. When the crankshaft 15 rotates, the fixed shaft 17 is driven to rotate through the second belt, thereby driving the exhaust fan 26 to rotate. After the exhaust fan 26 rotates, suction is generated, so that the dust on the inside of the sealing cover 21 can be adsorbed on the filter surface, thereby avoiding dust flying after the sealing cover 21 is opened.

[0057] In this embodiment, the first telescopic member 37 and the second telescopic member 43 are a hydraulic cylinder or an electric telescopic rod.

[0058] The implementation principle of this embodiment is as follows: when weighing, the material bucket 8 is placed on the top of the support plate 12 of the support assembly, and one side of the material bucket 8 is abutted against the positioning plate 10, and then the second telescopic member 43 is started to extend, and the steering rack 41 drives the steering gear 42 to rotate 90 degrees and then stop, so that the empty material bucket 8 is rotated to just below the sealing cover 21, and then the first telescopic member 37 is started to extend, so as to gradually lift the electronic scale 39 until the electronic scale 39 contacts the bottom of the material bucket 8, and then the material bucket 8 can be gradually lifted to make it out of contact with the top surface of the support plate 12, until the top of the material bucket 8 contacts the sealing cover 21, and then the extension of the first telescopic member 37 is stopped, and then the electronic scale 39 is reset to zero, and then the raw materials in the storage tank 46 can be discharged into the processing tank 2, and the motor is also started to drive the rotating shaft 30 to rotate;

[0059] After the rotating shaft 30 rotates, the pressing roller 24 is driven to rotate synchronously with it, so as to crush the material falling on the top surface of the screen 22, so as to crush the agglomerated material, and the crushed material falls into the discharge pipe 7. When the rotating shaft 30 rotates, the auger 34 is also driven to rotate synchronously, so that the screened material can be discharged from the discharge pipe 7 and finally fall into the material storage barrel 8.

[0060] When the rotating shaft 30 rotates, the crankshaft 15 is also driven to rotate. After the crankshaft 15 rotates, the linkage rack 20 is driven to move up and down through the connecting rod 16. The linkage rack 20 then drives the linkage gear 13 to rotate back and forth, thereby causing the transmission gear 31 to rotate back and forth. After the transmission gear 31 rotates back and forth, the gear ring 29 is driven to rotate back and forth, thereby driving the screen 22 to rotate back and forth, so that the powder falling on the screen 22 can fall off faster.

[0061] At the same time, the rotation of the crankshaft 15 will also drive the fixed shaft 17 to rotate, thereby driving the exhaust fan 26 to rotate and generate suction, so that the dust on the inside of the sealing cover 21 can be adsorbed on the surface of the filter screen, thereby avoiding dust flying after opening the sealing cover 21, and the scraper 32 rotates simultaneously with the auger 34, so that the raw materials attached to the inner wall of the sealing cover 21 and the filter screen can be scraped off and fall into the inside of the material barrel 8. When a material barrel 8 is filled, the first telescopic member 37 is started to retract until the material barrel 8 falls back to the top of the support plate 12, and the second telescopic member 43 is started to retract after the top of the electronic scale 39 also completely enters the recessed hole 36, thereby driving the mounting plate 9 to rotate 90 degrees in the opposite direction, so that the empty material barrel 8 can be replaced with the material barrel 8 full of raw materials, and then weighing and measuring can be performed again.

[0062] Example 2

[0063] Combination Figure 1 and Figure 7 - Fig. 9 Based on Example 1, this embodiment is further improved in that: a plurality of mounting grooves are opened on the top surface of the support plate 12, and rollers 38 are installed in the mounting grooves. The top of the roller 38 is higher than the top surface of the support plate 12, thereby reducing the friction between the material bucket 8 and the support plate 12, making it easier for it to slide on the support plate 12.

[0064] The implementation principle of this embodiment is: place the material barrel 8 on the top surface of the support plate 12. When moving the material barrel 8, it only needs to be pushed to slide on the top surface of the support plate 12, which can save more effort and facilitate the loading and unloading of the material barrel 8.

[0065] Example 3

[0066] Combination Figure 3 , Figure 5 and Figure 6 The present embodiment is further improved on the basis of the embodiments 1-2 in that: the processing tank 2 is a cylindrical structure, and the inner ring of the processing tank 2 is provided with a tooth groove 23 coaxially arranged therewith, and a tooth hole is provided at the top of the tooth groove 23, and a fixed gear 25 coaxially arranged therewith is fixed at one end of the pressure roller 24, and the fixed gear 25 is located in the tooth groove 23 and meshes with the tooth hole at the top thereof.

[0067] The implementation principle of this embodiment is: when the pressure roller 24 rotates following the rotating shaft 30, the fixed gear 25 also revolves around the rotating shaft 30 following the pressure roller 24, but at the same time, under the action of the tooth groove 23, the fixed gear 25 also rotates while revolving, thereby driving the pressure roller 24 to rotate while revolving, so as to better crush the material on the top surface of the screen 22.

[0068] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A chemical raw material powder weighing system, comprising a material storage unit and a weighing unit, characterized in that: The material storage part includes a mounting frame and a storage tank mounted on the top of the mounting frame, and the weighing part includes a material screening mechanism, a dust suction mechanism, a material discharge mechanism and a weighing mechanism; The material discharging mechanism comprises a bottom plate, a mounting plate rotatably connected to the top surface of the bottom plate through a support shaft, two material supporting assemblies mounted on the mounting plate, and a steering assembly mounted on the bottom plate for driving the mounting plate to rotate; The weighing mechanism comprises a placement plate mounted on the bottom plate via a first telescopic member and an electronic scale mounted on the top surface of the placement plate; The screening mechanism comprises a processing tank installed on the top of the base plate, a crushing assembly installed in the processing tank, a discharge pipe installed at the bottom of the processing tank and a sealing cover installed at the bottom of the discharge pipe, a feed pipe connected to the storage tank is installed on the top of the processing tank, the crushing assembly comprises a rotating shaft rotatably connected to the center of the top of the processing tank, a pressure roller rotatably connected to the outer periphery of the rotating shaft, a screen rotatably sleeved on the outer periphery of the rotating shaft and a linkage member installed on the processing tank and used to drive the screen to reciprocate, the outer ring of the screen is rotatably connected to the inner ring of the processing tank, the pressure roller is located on the top surface of the screen and cooperates with it, the bottom of the rotating shaft extends into the discharge pipe and is fixedly connected with an auger, the outer periphery of the auger is fixed with a scraper that fits the inner wall of the sealing cover, an air suction hole is opened on the sealing cover, a filter is installed in the air suction hole, and the linkage is drivingly connected with the rotating shaft; The dust suction mechanism includes an air suction component installed on the outer periphery of the processing tank and an air suction pipe for connecting the air suction component with the air suction hole; The bottom surface of the screen is fixed with a gear ring coaxially arranged therewith, and the linkage member includes a connecting shaft rotatably connected to the inner wall of the processing tank, a transmission gear fixed to one end of the connecting shaft, and a transmission member installed on the processing tank for driving the connecting shaft to reciprocate, and the transmission gear is located at the bottom of the gear ring and meshes with it; The other end of the connecting shaft extends to the outside of the processing tank and is fixed with a linkage gear. The transmission member includes a transmission shaft rotatably connected to the top of the processing tank, a crankshaft rotatably connected to the outer periphery of the processing tank, a connecting sleeve movably sleeved on the outer periphery of the connecting rod journal of the crankshaft, a connecting rod fixed on the outer periphery of the connecting sleeve, a linkage rack hinged at the other end of the connecting rod, and a limiter installed on the outer periphery of the linkage rack. One end of the transmission shaft is transmission-connected to the rotating shaft, the linkage rack is meshed with the linkage gear, and a main shaft of the crankshaft is connected to the other end of the transmission shaft through a first belt transmission. The suction assembly includes an outer shell installed on the outer periphery of the processing tank, a fixed shaft rotatably connected to the outer shell, and an exhaust fan fixed to one end of the fixed shaft. The other end of the fixed shaft extends outside the outer shell and is connected to the other main shaft of the crankshaft through a second belt drive. When the crankshaft rotates, the fixed shaft is driven to rotate through the second belt, thereby driving the exhaust fan to rotate. Suction is generated when the exhaust fan rotates.

2. A chemical raw material powder weighing system according to claim 1, characterized in that: The processing tank is a cylindrical structure, and the inner ring of the processing tank is provided with a tooth groove coaxially arranged therewith, and one end of the pressure roller is fixed with a fixed gear coaxially arranged therewith, and the fixed gear is located in the tooth groove and meshed therewith.

3. A chemical raw material powder weighing system according to claim 1, characterized in that: The limiting member comprises a limiting sleeve movably sleeved on the outer periphery of the linkage rack and a fixing rod fixed between the outer periphery of the limiting sleeve and the outer periphery of the processing tank.

4. A chemical raw material powder weighing system according to claim 1, characterized in that: The top surface of the bottom plate is provided with a concave hole for accommodating the weighing mechanism, and the concave hole is located directly below the sealing plate. The number of the first telescopic members is set to 2-3 groups.

5. A chemical raw material powder weighing system according to claim 1, characterized in that: The two support assemblies are respectively installed on both sides of the mounting plate, and the support assemblies include two support plates fixed on the side edges of the mounting plate, a fixing plate fixed between the two support plates, and a positioning plate fixed on the outer wall of the fixing plate on the side away from the mounting plate. The spacing between the two support plates is greater than the diameter of the placement plate. A fixing column is installed at the bottom of the support plate, and a ball bearing that abuts against the top surface of the bottom plate is installed at the bottom of the fixing column.

6. A chemical raw material powder weighing system according to claim 5, characterized in that: The top surface of the support plate is provided with a plurality of installation grooves, and rollers are installed in the installation grooves.

7. A chemical raw material powder weighing system according to claim 1, characterized in that: The steering assembly comprises a second telescopic member mounted on the top surface of the bottom plate, a steering rack fixed at the output end of the second telescopic member, and a steering gear sleeved on the outer periphery of the support shaft and meshed with the steering rack.

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