Multi-stage screening device for chemical powder processing

Abstract

The invention relates to the technical field of chemical powder screening equipment, and particularly discloses a multistage screening device for chemical powder processing, which comprises a supporting blanking mechanism, a screening mechanism assembly is arranged above the supporting blanking mechanism, a feeding transmission mechanism is arranged above the screening mechanism assembly, and the supporting blanking mechanism comprises a U-shaped plate. A discharging bin is arranged above the inner side of the U-shaped plate, a support is connected to the outer side of the discharging bin, the screening mechanism assembly comprises a plurality of screening mechanisms, each screening mechanism comprises a screen, the outer side of each screen is connected with an annular plate, a second supporting shaft is arranged in the middle of each screen in a penetrating mode and rotationally connected with the screen, and a scraping mechanism is arranged on the outer side of each second supporting shaft. Components in all the mechanisms in the screening device are convenient to disassemble, clean and maintain, the number of the screening mechanisms can be adjusted according to screening requirements of different levels, the using modes of the device are enriched, and the application range of the device is widened.

Description

Technical Field

[0001] The invention relates to the technical field of chemical powder screening equipment, and in particular discloses a multi-stage screening device for chemical powder processing. Background Art

[0002] Meta-toluic acid, abbreviated as MTA, also known as 3-methylbenzoic acid, is a white or yellow crystalline powder, almost insoluble in water, slightly soluble in boiling water, soluble in ethanol and ether. Meta-toluic acid is widely used in organic synthesis, pesticide production, photography, medicine and dyes. In the process of meta-toluic acid processing, in order to distinguish meta-toluic acid of different particle size grades, a multi-stage screening device is usually used to screen the meta-toluic acid.

[0003] The Chinese patent with the patent number CN113634491B discloses a multi-stage screening device for chemical powder materials, including a bottom plate, a screening cylinder, a connecting frame, a shaking component, a connecting component and a screening component; the screening component can not only perform multi-stage vibration screening on the chemical powder materials, but also can timely brush off the chemical powder materials adhering to the inner wall of the screening shell through the cleaning unit, effectively reducing the waste of chemical powder materials and reducing the screening cost. Secondly, the scraping teeth arranged on the cleaning unit can not only stir the chemical powder materials in the screening shell during the screening process, but also can The chemical powder materials in blocks are crushed to prevent them from clogging the sieve holes. At the same time, during the screening process, the shaking components and the connecting components can cooperate with each other to drive the chemical powder materials in the screening shell to shake, thereby effectively improving the screening efficiency of the chemical powder materials. However, it is inconvenient to disassemble, clean and maintain the relevant components of the screening components in the above-mentioned screening device. The above-mentioned screening device has a single number of screening levels, and the number of sieve plates and their connecting components cannot be adjusted according to the requirements of different screening levels of chemical powders. Therefore, in order to solve the above-mentioned problems, the present invention proposes a multi-stage screening device for chemical powder processing. Summary of the invention

[0004] The present invention aims to provide a multi-stage screening device for chemical powder processing. The components in each mechanism in the device are easy to disassemble, clean and maintain. The number of screening mechanisms can be adjusted according to the screening requirements of different levels, thereby enriching the use of the device and improving the scope of application of the device.

[0005] The present invention is achieved through the following technical solutions: A multi-stage screening device for chemical powder processing comprises a supporting and dropping mechanism, a screening mechanism assembly is arranged above the supporting and dropping mechanism, a feeding transmission mechanism is arranged above the screening mechanism assembly, the supporting and dropping mechanism comprises a U-shaped plate, slide grooves are arranged on both sides above the U-shaped plate, a lower material bin is arranged above the inner side of the U-shaped plate, a first supporting plate is arranged inside the lower material bin, a bracket is connected to the outer side of the lower material bin, a second supporting plate is detachably connected to both sides of the bracket, a first telescopic rod is arranged on one side of the bracket, the screening mechanism assembly comprises a plurality of screening mechanisms, the screening mechanism comprises a screen, an annular plate is connected to the outer side of the screen, a discharge port is arranged on the side of the annular plate away from the first telescopic rod, and one end of the discharge port is connected to an outlet A material pipe, a through hole is provided on one side of the discharge pipe, a baffle is provided inside the through hole, one end of the baffle is connected to a second telescopic rod, a second support shaft is provided in the middle of the screen and is rotatably connected to the second support shaft, a scraper mechanism is provided on the outer side of the second support shaft, the scraper mechanism includes a sleeve and a support rod, support rods are connected to both sides of the sleeve, a plurality of vertical rods distributed in a linear array are connected above the support rod, a first scraper is connected below the support rod, a pressure roller is rotatably connected to one end of the support rod away from the sleeve, the feed transmission mechanism includes a top plate, a first connecting shaft is provided in the middle of the top plate and is rotatably connected to the first connecting shaft, a diverter is connected above the first connecting shaft, and a motor is provided on one side of the diverter.

[0006] As a further configuration of the above scheme, multiple supporting legs are connected to both sides of the lower side of the U-shaped plate, which can provide stable support for the device; a counterweight block is connected below the end of the U-shaped plate away from the slide slot, which can prevent the screening device from being stuck in a sheet; sliders are connected to both ends of the lower side of the bracket, and the sliders are slidably connected to the slide slot, which can limit the moving direction of the bracket and its connecting parts; the bracket is detachably connected to the first telescopic rod, and a first support seat is connected to the outer side of the first telescopic rod, and the lower end of the first support seat is connected to the U-shaped plate, which is convenient for the installation and maintenance of the first telescopic rod and provides power for the movement of the bracket and its connecting parts; storage boxes and controllers are respectively provided on both sides of the first support seat, which are convenient for placing accessories in the device and tools required for installing the device, so that workers can take them and control the operation of relevant components in the device.

[0007] As a further arrangement of the above scheme, a discharge pipe is connected to the lower end of the lower material bin to facilitate the discharge of chemical powder screened by the bottom layer of the sieve. Both ends of the first support plate are connected to the inner wall of the lower material bin to facilitate the installation and maintenance of the first support plate. The middle part of the first support plate is rotatably connected to the first support shaft, the upper end of the first support column shaft is connected to a mounting plate, the upper and lower ends of the second support shaft are connected to mounting plates, the lower end of the first connecting shaft is connected to a mounting plate, and the two upper and lower adjacent mounting plates are detachably connected to facilitate the installation and maintenance of the above components. After the above three support shafts are connected, the second support shaft and the first support shaft can be driven to rotate at the same time through the third support shaft, thereby driving the scraping mechanism outside the second support shaft to rotate.

[0008] As a further arrangement of the above scheme, a guide plate is connected to the end of the discharge pipe away from the discharge port, the lower part of the baffle is slidably connected to the discharge pipe, the baffle is detachably connected to the second telescopic rod, the outer side of the second telescopic rod is connected to the second support seat, which is convenient for the installation and maintenance of the above components and helps to control the discharge speed of the discharge port, the outer side of the annular plate is connected to a support ring, both ends of the support ring are detachably connected to the second support plate, the ends of the upper and lower adjacent second support plates close to each other are detachably connected, which helps to install multiple screening mechanisms together in sequence through the connection between the second support plates, and one end of the second support seat is connected to the support ring, which is convenient for the installation and maintenance of the second support seat.

[0009] As a further arrangement of the above scheme, the sleeve is detachably connected to the second support shaft, the support rod is detachably connected to the sleeve, both ends of the pressure roller are rotatably connected to connecting plates, the upper end of the connecting plate is connected to the support rod, and the end of the support rod away from the sleeve is detachably connected to the second scraper, which facilitates the installation and maintenance of the above components, and can drive the screen to vibrate through the rolling of the pressure roller, thereby shaking off the chemical powder in the sieve holes of the screen, which can prevent the chemical powder from sticking to the screen and the annular plate, thereby ensuring the screening efficiency of the device for chemical powder.

[0010] As a further arrangement of the above scheme, the sieves and annular plates in two adjacent screening mechanisms are butted against each other at one end, which can prevent chemical powder from falling from the connection between the sieves and the annular plates in the screening mechanism to the outside of the screening mechanism, the upper plane of the lower silo is butted against the lower plane of the sieve, and the lower plane of the top plate is butted against the upper plane of the annular plate, which can prevent chemical powder from falling from the contact point between the annular plate and the top plate to the outside of the annular plate, and third support plates are connected to both sides below the top plate, and the third support plate is detachably connected to the upper end of the second support plate, which is convenient for the top plate and the entire feeding transmission Installation and maintenance of the mechanism: feed pipes are connected to both sides above the top plate, which are convenient for injecting the chemical powder to be screened into the inner side of the top plate and the topmost screening mechanism for screening; a second connecting shaft is connected to the side of the diverter close to the motor, one end of the second connecting shaft is connected to the motor, and an organic base is connected to the outside of the motor, which can provide stable support for the motor, facilitate the installation and maintenance of the motor and its connecting parts, and can reduce the overall height of the motor, the second connecting shaft, the diverter and the first connecting shaft after connection, avoiding conflicts between the motor and the second connecting shaft and the feeding of the original feeding device.

[0011] As a further configuration of the above scheme, the mesh openings of the sieves in the multi-stage screening mechanism decrease in order from top to bottom, which helps to screen the chemical powder step by step.

[0012] The diverter in the multi-stage screening device for chemical powder processing is a right-angle diverter. Before use, the number of screening mechanisms is determined according to the level requirements of screening, and the screening mechanisms are connected in sequence from bottom to top in the order of the sieve holes of the sieve mesh from small to large. The feed transmission mechanism is installed above the uppermost screening mechanism, so that the lower end of the third support plate is connected to the upper end of the second support plate. The controller 5 is used to start the motor 35, so that the motor drives the second support shaft, the first support shaft and the scraper mechanism to rotate, and the chemical powder to be screened is injected into the cavity formed by the top plate and the annular plate in the uppermost screening mechanism through the feed pipe, and is screened step by step from top to bottom and from large to small. Before falling onto the screen, it contacts the rotating vertical rod and is broken up by the vertical rod. The rotating pressure roller can squeeze the screen to make the screen vibrate, thereby accelerating the screening efficiency of the screen. The controller is used to control the extension and retraction of the first telescopic rod to drive the slider to slide back and forth in the slide groove, so that the device shakes, and the screening efficiency of the screening mechanism is further improved.

[0013] The present invention has the following beneficial effects in practical application: The combined design of the slide groove, the slider and the first telescopic rod in the supporting blanking mechanism can drive the slider to slide back and forth in the slide groove through the extension and contraction of the first telescopic rod, thereby driving the bracket, the unloading bin, the screening mechanism and the feeding transmission mechanism to move back and forth, causing the screen to shake and improving the screening efficiency of the screening mechanism. The use of the counterweight block can balance the force of the U-shaped plate and avoid the device from being overweight, so that the device remains stable during the screening of chemical powders. The use of the storage box is convenient for placing the relevant accessories in the device and the tools required to assemble the device for workers to use.

[0014] The combined use of multiple screening mechanisms can flexibly adjust the number of screening mechanisms and the arrangement of screens of various models according to the different screening level requirements of chemical powders, enrich the use of the device, and improve the application scope of the device. The use of multiple vertical rods in the scraper mechanism can preliminarily break up the chemical powder entering the screening mechanism where the vertical rods are located before it falls onto the screen. The design of the pressure roller can squeeze the screen during rotation, causing the screen to vibrate, thereby further improving the screening efficiency of the screen and the screening mechanism.

[0015] The combination of the steering gear, the motor and the two connecting shafts in the feed transmission mechanism can reduce the overall height of the above components after being combined, avoid conflicts between the above components and the installation positions of the original feeding device, and ensure the feeding effect of the feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 is a first perspective schematic diagram of the present invention; Figure 2 is a second perspective schematic diagram of the present invention; Figure 3 It is a side perspective schematic diagram of the present invention; Figure 4 It is a perspective schematic diagram of the supporting blanking mechanism in the present invention; Figure 5 It is a perspective schematic diagram of the combination of the annular plate, the support ring and the discharge pipe in the present invention; Figure 6 It is a perspective schematic diagram of the scraping mechanism in the present invention; Figure 7 It is a perspective schematic diagram of the combination of the first connecting shaft, the steering gear and the second connecting shaft in the present invention.

[0018] In the figure: 1, supporting and dropping mechanism; 2, screening mechanism; 3, feeding transmission mechanism; 4, storage box; 5, controller; 11, U-shaped plate; 111, slideway; 112, counterweight block; 12, supporting leg; 13, unloading bin; 131, discharge pipe; 14, first supporting plate; 15, first supporting shaft; 16, mounting plate; 17, bracket; 171, slider; 18, second supporting plate; 19, first telescopic rod; 191, first supporting seat; 21, screen; 22, annular plate; 221, discharge port; 23, discharge pipe; 2 31. through hole; 232. guide plate; 233. baffle; 24. second telescopic rod; 241. second support seat; 25. support ring; 26. second support shaft; 27. scraper mechanism; 271. sleeve; 272. support rod; 273. first scraper; 274. vertical rod; 275. connecting plate; 276. pressure roller; 277. second scraper; 31. top plate; 311. third support plate; 32. first connecting shaft; 33. steering gear; 34. second connecting shaft; 35. motor; 351. machine base; 36. feed pipe. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 7 , and describes the application in detail with reference to embodiments.

[0021] The embodiment discloses a multi-stage screening device for chemical powder processing, comprising a supporting and dropping mechanism 1, a screening mechanism 2 component is arranged above the supporting and dropping mechanism 1, a feeding transmission mechanism 3 is arranged above the screening mechanism 2 component, the supporting and dropping mechanism 1 comprises a U-shaped plate 11, both sides of the upper part of the U-shaped plate 11 are provided with slide grooves 111, a lower material bin 13 is arranged above the inner side of the U-shaped plate 11, a first supporting plate 14 is arranged inside the lower material bin 13, a bracket 17 is connected to the outer side of the lower material bin 13, both sides of the bracket 17 are detachably connected with a second supporting plate 18, a first telescopic rod 19 is arranged on one side of the bracket 17, the screening mechanism 2 component comprises a plurality of screening mechanisms 2, the screening mechanism 2 comprises a screen 21, an annular plate 22 is connected to the outer side of the screen 21, a discharge port 221 is arranged on the side of the annular plate 22 away from the first telescopic rod 19, one end of the discharge port 221 is connected to a discharge pipe 23, and the discharge pipe 2 A through hole 231 is provided on one side of the screen 21, a baffle 233 is provided inside the through hole 231, one end of the baffle 233 is connected to the second telescopic rod 24, a second support shaft 26 is provided in the middle of the screen 21 and is rotatably connected to the second support shaft 26, a scraper mechanism 27 is provided on the outer side of the second support shaft 26, and the scraper mechanism 27 includes a sleeve 271 and a support rod 272, both sides of the sleeve 271 are connected to the support rod 272, and the support rod 272 is provided with a plurality of support rods 271, and the support rod 272 is provided with a plurality of support rods 272. A plurality of vertical rods 274 distributed in a linear array are connected to the top, a first scraper 273 is connected to the bottom of the support rod 272, a pressure roller 276 is rotatably connected to the end of the support rod 272 away from the sleeve 271, the feed transmission mechanism 3 includes a top plate 31, a first connecting shaft 32 is penetrated through the middle of the top plate 31 and is rotatably connected to the first connecting shaft 32, a diverter 33 is connected to the top of the first connecting shaft 32, and a motor 35 is provided on one side of the diverter 33.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, multiple supporting legs 12 are connected to both sides of the lower part of the U-shaped plate 11, which can provide stable support for the device; a counterweight block 112 is connected below the end of the U-shaped plate 11 away from the slide slot 111, which can prevent the screening device from being stuck in the film; sliders 171 are connected to both ends of the lower part of the bracket 17, and the slider 171 is slidably connected to the slide slot 111, which can limit the moving direction of the bracket 17 and its connecting parts; the bracket 17 is detachably connected to the first telescopic rod 19, and a first supporting seat 191 is connected to the outer side of the first telescopic rod 19, and the lower end of the first supporting seat 191 is connected to the U-shaped plate 11, which is convenient for the installation and maintenance of the first telescopic rod 19 and provides power for the movement of the bracket 17 and its connecting parts; storage boxes 4 and controllers 5 are respectively provided on both sides of the first supporting seat 191, which are convenient for placing accessories in the device and tools required for installing the device, so that workers can take them and control the operation of related components in the device.

[0023] like Figure 3 and Figure 4 As shown, the lower end of the lower material bin 13 is connected with a discharge pipe 131, which is convenient for discharging the chemical powder screened by the bottom layer of the screen 21. Both ends of the first support plate 14 are connected to the inner wall of the lower material bin 13, which is convenient for the installation and maintenance of the first support plate 14. The middle part of the first support plate 14 is rotatably connected with the first support shaft 15, the upper end of the first support column shaft is connected with a mounting plate 16, the upper and lower ends of the second support shaft 26 are connected with mounting plates 16, and the lower end of the first connecting shaft 32 is connected with a mounting plate 16. The two adjacent mounting plates 16 are detachably connected, which is convenient for the installation and maintenance of the above components. After the above three support shafts are connected, the second support shaft 26 and the first support shaft 15 can be driven to rotate through the third support shaft at the same time, thereby driving the scraper mechanism 27 on the outside of the second support shaft 26 to rotate.

[0024] like Figure 1 , Figure 3 and Figure 5 As shown, the end of the discharge pipe 23 away from the discharge port 221 is connected to a guide plate 232, and the lower part of the baffle 233 is slidably connected to the discharge pipe 23, and the baffle 233 is detachably connected to the second telescopic rod 24, and the outer side of the second telescopic rod 24 is connected to a second support seat 241, which is convenient for the installation and maintenance of the above-mentioned components and helps to control the discharge speed of the discharge port 221, and the outer side of the annular plate 22 is connected to a support ring 25, and both ends of the support ring 25 are detachably connected to the second support plate 18, and the ends of the two adjacent second support plates 18 above and below are detachably connected to each other, which helps to install multiple screening mechanisms 2 together in sequence through the connection between the second support plates 18 and the second support plates 18, and one end of the second support seat 241 is connected to the support ring 25, which is convenient for the installation and maintenance of the second support seat 241.

[0025] like Figure 3 and Figure 6 As shown, the sleeve 271 is detachably connected to the second support shaft 26, the support rod 272 is detachably connected to the sleeve 271, both ends of the pressure roller 276 are rotatably connected with connecting plates 275, the upper end of the connecting plate 275 is connected to the support rod 272, and the end of the support rod 272 away from the sleeve 271 is detachably connected with a second scraper 277, which is convenient for the installation and maintenance of the above-mentioned components, and can drive the screen 21 to vibrate through the rolling of the pressure roller 276, thereby shaking off the chemical powder in the sieve holes of the screen 21, and can prevent the chemical powder from sticking to the screen 21 and the annular plate 22, thereby ensuring the screening efficiency of the device for chemical powder.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the sieves 21 and the annular plates 22 in two adjacent screening mechanisms 2 are in contact with each other at one end, which can prevent chemical powder from falling from the connection between the sieves 21 and the annular plates 22 in the screening mechanism 2 to the outside of the screening mechanism 2. The upper plane of the lower bin 13 is in contact with the lower plane of the sieve 21, and the lower plane of the top plate 31 is in contact with the upper plane of the annular plate 22, which can prevent chemical powder from falling from the contact point between the annular plate 22 and the top plate 31 to the outside of the annular plate 22. The third support plates 311 are connected to both sides of the bottom of the top plate 31, and the third support plates 311 are detachably connected to the upper end of the second support plate 18, which is convenient for the installation of the top plate 31 and the entire feeding transmission mechanism 3. and maintenance, feed pipes 36 are connected to both sides above the top plate 31, which are convenient for injecting the chemical powder to be screened into the inner side of the top plate 31 and the topmost screening mechanism 2 for screening, and a second connecting shaft 34 is connected to the side of the diverter 33 close to the motor 35, one end of the second connecting shaft 34 is connected to the motor 35, and an organic base 351 is connected to the outer side of the motor 35, which can provide stable support for the motor 35, facilitate the installation and maintenance of the motor 35 and its connecting parts, and can reduce the overall height of the motor 35, the second connecting shaft 34, the diverter 33 and the first connecting shaft 32 after being connected, so as to avoid conflicts between the motor 35, the second connecting shaft 34 and other components and the feeding of the original feeding device.

[0027] like Figure 3 As shown, the mesh openings of the screen 21 in the multi-stage screening mechanism 2 decrease in order from top to bottom, which helps to screen the chemical powder step by step.

[0028] The multi-stage screening device for chemical powder processing disclosed in this embodiment determines the number of screening mechanisms 2 according to the level requirements of screening before use, connects the screening mechanisms 2 in order from small to large in the order of the mesh holes of the screen mesh 21 from bottom to top, connects the mounting plate 16 at the lower end of the second support shaft 26 in the screening mechanism 2 with the smallest mesh hole to the mounting plate 16 at the upper end of the first support shaft 15, connects the lower ends of the second support plates 18 on both sides of the support ring 25 in the screening mechanism 2 with the smallest mesh hole to the upper ends of the second support plates 18 at both ends of the bracket 17, and connects the upper plane of the lower silo 13 to the upper surface of the lower silo 13. The lower plane of the screen 21 in the screening mechanism 2 with the smallest screen hole is abutted, and the remaining screening mechanisms 2 are installed in order from the smallest screen hole to the largest screen hole above the screening mechanism 2 with the smallest screen hole, so that the upper planes of the annular plates 22 in two adjacent screening mechanisms 2 are abutted against the lower plane of the screen 21, and the feeding transmission mechanism 3 is installed above the uppermost screening mechanism 2, so that the lower end of the third support plate 311 is connected to the upper end of the second support plate 18, the feeding end of the original feeding device is connected to the feeding pipe 36, and the original material receiving device is connected to the guide plate 232 and the discharge pipe 131 in turn.

[0029] The controller 5 is used to start the motor 35, so that the motor 35 drives the second support shaft 26, the first support shaft 15 and the scraper mechanism 27 to rotate through the second connecting shaft 34, the steering gear 33, the first connecting shaft 32 and the second supporting shaft 26, and the feeding device is used to inject the chemical powder to be screened into the cavity formed by the top plate 31 and the annular plate 22 in the uppermost screening mechanism 2 through the feeding pipe 36, and screen it step by step from top to bottom and from large to small. Before falling onto the screen 21, it contacts the rotating vertical rod 274 and is broken up by the vertical rod 274. The rotating pressure roller 276 can squeeze the screen 21 to make the screen 21 vibrate, thereby accelerating the screening efficiency of the screen 21, and the first scraper 273 and the second scraper 277 can The controller 5 is used to control the extension and retraction of the first telescopic rod 19, which can drive the slider 171 to slide back and forth in the slide groove 111, thereby driving the supporting blanking mechanism 1, the screening mechanism 2 and the feeding transmission mechanism 3 to move back and forth, so that the device shakes, and further improves the screening efficiency of the screening mechanism 2. The controller 5 is used to control the extension and retraction of each second telescopic rod 24, so as to control the depth of the baffle 233 inserted into the through hole 231, thereby controlling the speed of the chemical powder on the screen 21 to be discharged from the discharge port 221, so that the chemical powders of different particle size levels after screening are discharged into the receiving device through the corresponding guide plate 232 and the discharge pipe 131.

[0030] The present invention discloses a storage box 4, a controller 5, a U-shaped plate 11, a chute 111, a counterweight 112, a support leg 12, a lower bin 13, a discharge pipe 131, a first support plate 14, a first support shaft 15, a mounting plate 16, a bracket 17, a slider 171, a first telescopic rod 19, a first support seat 191, a screen 21, an annular plate 22, a discharge pipe 23, a guide plate 232, a baffle 233, a second telescopic rod 24, The second support seat 241, the second support shaft 26, the sleeve 271, the support rod 272, the first scraper 273, the vertical rod 274, the pressure roller 276, the second scraper 277, the top plate 31, the first connecting shaft 32, the diverter 33, the second connecting shaft 34, the motor 35, the base 351 and the feed pipe 36 and other components are all universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage screening device for chemical powder processing, comprising a supporting and dropping mechanism, characterized in that: A screening mechanism assembly is arranged above the supporting blanking mechanism, a feeding transmission mechanism is arranged above the screening mechanism assembly, the supporting blanking mechanism comprises a U-shaped plate, slide grooves are arranged on both sides above the U-shaped plate, a lower material bin is arranged above the inner side of the U-shaped plate, a first supporting plate is arranged inside the lower material bin, a bracket is connected to the outer side of the lower material bin, a second supporting plate is detachably connected to both sides of the bracket, a first telescopic rod is arranged on one side of the bracket, the screening mechanism assembly comprises a plurality of screening mechanisms, the screening mechanism comprises a screen, an annular plate is connected to the outer side of the screen, a discharge port is arranged on the side of the annular plate away from the first telescopic rod, a discharge pipe is connected to one end of the discharge port, and a discharge pipe is arranged on one side. A through hole, wherein a baffle is provided inside the through hole, one end of the baffle is connected to a second telescopic rod, a second support shaft is provided in the middle of the screen and is rotatably connected to the second support shaft, a scraper mechanism is provided on the outer side of the second support shaft, the scraper mechanism includes a sleeve and a support rod, support rods are connected to both sides of the sleeve, a plurality of vertical rods distributed in a linear array are connected above the support rod, a first scraper is connected below the support rod, a pressure roller is rotatably connected to one end of the support rod away from the sleeve, the feed transmission mechanism includes a top plate, a first connecting shaft is provided in the middle of the top plate and is rotatably connected to the first connecting shaft, a diverter is connected above the first connecting shaft, and a motor is provided on one side of the diverter.

2. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: A plurality of supporting legs are connected to both sides of the lower part of the U-shaped plate, a counterweight is connected to the lower part of the end of the U-shaped plate away from the slide slot, sliders are connected to both ends of the lower part of the bracket, the sliders are slidably connected to the slide slot, the bracket is detachably connected to the first telescopic rod, a first supporting seat is connected to the outer side of the first telescopic rod, the lower end of the first supporting seat is connected to the U-shaped plate, and storage boxes and controllers are respectively provided on both sides of the first supporting seat.

3. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: The lower end of the lower material bin is connected to a discharge pipe, both ends of the first support plate are connected to the inner wall of the lower material bin, the middle part of the first support plate is rotatably connected to a first support shaft, the upper end of the first support column shaft is connected to a mounting plate, the upper and lower ends of the second support shaft are connected to mounting plates, the lower end of the first connecting shaft is connected to a mounting plate, and the two upper and lower adjacent mounting plates are detachably connected.

4. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: The end of the discharge pipe away from the discharge port is connected to a guide plate, the lower part of the baffle is slidably connected to the discharge pipe, the baffle is detachably connected to the second telescopic rod, the outer side of the second telescopic rod is connected to a second support seat, the outer side of the annular plate is connected to a support ring, both ends of the support ring are detachably connected to the second support plates, the ends of the two upper and lower adjacent second support plates close to each other are detachably connected, and one end of the second support seat is connected to the support ring.

5. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: The sleeve is detachably connected to the second support shaft, the support rod is detachably connected to the sleeve, both ends of the pressure roller are rotatably connected to connecting plates, the upper end of the connecting plate is connected to the support rod, and the end of the support rod away from the sleeve is detachably connected to the second scraper.

6. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: The screens and annular plates in two adjacent screening mechanisms are butted against one end close to each other, the upper plane of the lower hopper is butted against the lower plane of the screen, the lower plane of the top plate is butted against the upper plane of the annular plate, the third support plates are connected to the third support plates on both sides below the top plate, the third support plates are detachably connected to the upper end of the second support plates, the feed pipes are connected to the feed pipes on both sides above the top plate, the second connecting shaft is connected to the side of the diverter close to the motor, one end of the second connecting shaft is connected to the motor, and the outer side of the motor is connected to the base.

7. A multi-stage screening device for chemical powder processing according to claim 1, characterized in that: The mesh openings of the screens in the multi-stage screening mechanism decrease in order from top to bottom.

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