CN115350907A

CN115350907A - Powder screening plant with prevent blockking up function

Info

Publication number: CN115350907A
Application number: CN202210982471.1A
Authority: CN
Inventors: 陈巨喜; 朱福林; 肖亮; 聂蓉; 钱利洪
Original assignee: Hengyang Kaixin Special Materials Technology Co ltd
Current assignee: Hengyang Kaixin Special Materials Technology Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-11-18
Anticipated expiration: 2042-08-16
Also published as: CN115350907B

Abstract

The invention discloses a powder screening device with an anti-blocking function, which comprises an outer tank body, a collecting hopper, a screening barrel, a vibration motor, a feeding hopper, a feeding pipe, a discharging hopper, a brush disc, a first hydraulic cylinder, a connecting seat, a rotating shaft and a first driving part, wherein the outer tank body is provided with a first end and a second end; when the screening device is used for screening silicon nitride powder, the silicon nitride powder can be prevented from blocking screening holes; specifically, when needs are to cleaing away the downthehole material that blocks up of screening, stop vibrating motor earlier, then first pneumatic cylinder extension, drive brush dish descends in order to stretch into the screening bucket, finally makes brush hair and screening dish butt, then starts first drive part, rotate with the drive brush dish, rotate the brush hair and clear away the downthehole material that blocks up of screening, thereby dredge the screening hole of screening dish, when carrying out powder screening with solving current sieving mechanism, the sieve mesh often can be blocked up by the material problem.

Description

Powder screening plant with prevent blockking up function

Technical Field

The invention relates to the technical field of screening devices, in particular to a powder screening device with an anti-blocking function.

Background

Silicon nitride is an inorganic substance and has a chemical formula of Si3N4; silicon nitride is an important structural ceramic material, has high hardness, self lubricating property and abrasion resistance, and is an atomic crystal; the silicon nitride has stronger oxidation resistance at high temperature and can resist cold and hot impact; heating to above 1000 deg.C in air, cooling rapidly, and heating rapidly without fragmentation. Because of such excellent material properties, silicon nitride ceramics are widely used for manufacturing mechanical components such as bearings, turbine blades, mechanical seal rings, and permanent molds.

Because the silicon nitride powder is not of uniform size, in order to obtain the silicon nitride powder of unified standard, need sieve in silicon nitride powder production process, the silicon nitride powder that will not conform to the standard is sieved out, and current sieving mechanism is when carrying out the powder screening, and the sieve mesh often can be stopped up by the material, can reduce screening efficiency after the screen cloth is stopped up.

Disclosure of Invention

The invention mainly aims to provide a powder screening device with an anti-blocking function, and aims to solve the problem that screen holes are often blocked by materials when the existing screening device is used for screening powder.

The content of the invention comprises:

a powder screening device with an anti-blocking function comprises an outer tank body, a collecting hopper, a screening barrel, a vibrating motor, a feeding hopper, a feeding pipe, a discharging hopper, a brush disc, a first hydraulic cylinder, a connecting seat, a rotating shaft and a first driving part; the collecting hopper is communicated with the lower part of the outer tank body; a feed opening is formed in the bottom of the aggregate bin; the screening barrel is arranged in the outer tank body; the screening barrel comprises a barrel wall arranged in an annular mode and a screening disc arranged at the bottom of the barrel wall; the screening disc is provided with screening holes; the vibration motor is arranged on the outer wall of the barrel wall; the feeding pipe penetrates through the top of the outer tank body; the feed hopper is communicated with the feed pipe; the feed hopper is used for placing materials to be screened, and the materials to be screened enter the screening barrel through the feed pipe; the discharge hopper is arranged on the side wall of the outer tank body in a penetrating way; the discharge hopper is used for receiving the residual materials on the screening disc after the screening is finished; the base of the first hydraulic cylinder is arranged at the inner top of the outer tank body; the telescopic direction of the first hydraulic cylinder is a vertical direction; the central axis of the screening barrel is collinear with the central axis of the outer tank body, and the central axis of the screening barrel is vertically arranged; the connecting seat is connected to the telescopic end of the first hydraulic cylinder; the rotating shaft is rotatably arranged on the connecting seat; the first driving part is used for driving the rotating shaft to rotate; the bottom end of the rotating shaft is connected with the brush disc; the brush disc is positioned above the screening barrel, and bristles are arranged at the bottom of the brush disc; the brush disc is used for extending into the screening barrel so as to dredge the screening holes.

Preferably, the brush disc is horizontally arranged, and the brush disc and the rotating shaft share a central axis; the rotating shaft and the screening barrel share a central axis; the outer diameter of the brush disc is smaller than the inner diameter of the screening barrel, and the difference between the outer diameter of the brush disc and the inner diameter of the screening barrel is smaller than a preset value; the first hydraulic cylinder and the rotating shaft share a central axis; the telescopic end of the first hydraulic cylinder is connected to the connecting seat through a connecting frame; the rotating shaft of the rotating shaft and the brush disc share a central axis.

Preferably, the first driving part comprises a first motor, a first gear and a second gear; the rotating shaft is rotatably arranged in the connecting seat in a penetrating way through a tapered roller bearing; the rotating shaft is coaxially sleeved with the first gear; the first motor is arranged on the connecting seat; the second gear is coaxially connected with the output shaft of the first motor; the first gear and the second gear are meshed; the number of teeth of the first gear is larger than that of the second gear, and the outer diameter of the first gear is larger than that of the second gear.

Preferably, the device also comprises a support ring, a first connecting rod, a second hydraulic cylinder and a sealing assembly; a discharge hole is formed in one side, close to the discharge hopper, of the barrel wall; the sealing component is used for sealing or opening the discharge hole; one side of the discharge hopper, which is positioned on the outer tank body, is positioned below the discharge port; the bottom of the screening barrel is elastically connected to the support ring; the first connecting rod and the second connecting rod are respectively connected to two sides of the support ring, and are symmetrical about the central axis of the support ring; the first connecting rod is hinged to the inner side wall of the outer tank body; the rotating shaft of the support ring is a horizontal shaft and is perpendicular to the first connecting rod; the base of the second hydraulic cylinder is hinged to the inner side wall of the outer tank body; the telescopic end of the second hydraulic cylinder is hinged to the second connecting rod; the rotating shaft of the second hydraulic cylinder relative to the outer tank body is parallel to the rotating shaft of the support ring relative to the outer tank body; the base of the second hydraulic cylinder is lower than the support ring.

Preferably, the device further comprises a first spring; the first connecting rod and the second connecting rod share a central axis; the support ring is parallel to the screening disc, and the support ring and the screening disc share a central axis; the number of the first springs is multiple; the first springs are uniformly arranged between the support ring and the bottom of the screening disc in an annular mode; one end of the first spring is connected to the bottom of the screening disc; the other end of the first spring is connected to the support ring.

Preferably, the device further comprises a positioning block; the positioning block is arranged on the inner side wall of the outer tank body; the positioning block is used for being abutted against the second connecting rod; when the positioning block is abutted to the second connecting rod, the support ring is in a horizontal state.

Preferably, the closing assembly comprises a closing plate, a first connecting arm, a second spring, an attraction block and a first electromagnet; the sealing plate is an arc-shaped plate; a first sliding chute and a second sliding chute which are parallel to each other are arranged on the two sides of the discharge hole of the barrel wall, and the extending direction of the first sliding chute is parallel to the central axis of the screening disc; one side of the closing plate is slidably embedded into the first sliding groove, and the other side of the closing plate is slidably embedded into the second sliding groove, so that the closing plate is in sliding fit contact with the outer wall of the barrel wall; the first connecting arm and the second connecting arm are both connected to the outer wall of the barrel wall, and the first connecting arm is positioned above the second connecting arm; the first connecting arm is positioned on one side of the closing plate, which is far away from the barrel wall; the second connecting arm is positioned on one side of the closing plate, which is far away from the barrel wall; the side of the closing plate, which is far away from the barrel wall, is provided with the suction block; the suction block is positioned between the first connecting arm and the second connecting arm; one end of the second spring is connected to the suction block, and the other end of the second spring is connected to the second connecting arm; the second spring is in a stretching state, so that the closing plate has a downward sliding tendency, and the closing plate closes the discharge hole; the first electromagnet is arranged on one side, facing the attraction block, of the first connecting arm; the first electromagnet is used for attracting the attraction block so as to enable the closing plate to open the discharge hole.

Preferably, the closure assembly further comprises a first link, a second link, a third link and a fourth link; the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are all connected to the outer wall of the barrel wall; the first, second, third, and fourth links are parallel to one another; the first and third links are located on one side of the closure panel; the second connecting rod and the fourth connecting rod are positioned on the other side of the closing plate; two ends of the first connecting arm are respectively connected to the first connecting rod and the second connecting rod; two ends of the second connecting arm are respectively connected to the third connecting rod and the fourth connecting rod; a limiting strip is arranged on one side of the closing plate, which is far away from the suction block; the limiting strip is parallel to the upper edge of the barrel wall; the limiting strip is used for being abutted to the upper edge of the barrel wall, and when the limiting strip is abutted to the upper edge of the barrel wall, the sealing plate seals the discharge hole.

Preferably, the bottom of the feed hopper is communicated with a vertical pipe; the feed pipe comprises a first pipe and a second pipe which are communicated with each other; the first pipe is rotatably arranged at the top of the outer tank body in a penetrating manner through a tapered roller bearing; the central axis of the first pipe is vertically arranged; the second pipe is communicated with the bottom of the first pipe; the second pipe is obliquely arranged relative to the first pipe; the vertical pipe is embedded in the first pipe and is vertically arranged; the vertical pipe and the first pipe share a central axis; the outer wall of the vertical pipe is in sliding fit contact with the inner wall of the first pipe; a supporting rod for fixing the feed hopper is arranged between the feed hopper and the top of the outer tank body; the screening device also comprises a second driving component for driving the first pipe to rotate.

Preferably, the second driving part comprises a first pulley, a second motor, a second pulley and a belt; the first belt pulley is coaxially sleeved on the first pipe; the first belt pulley is positioned above the outer tank body; the second motor is arranged at the top of the outer tank body; the second belt pulley is coaxially connected to an output shaft of the second motor; the belt tensioning sleeve is arranged on the first belt pulley and the second belt pulley; the diameter of the second pulley is smaller than the diameter of the first pulley.

The invention has the beneficial effects that:

when the powder screening device with the anti-blocking function provided by the invention is used for screening silicon nitride powder, the silicon nitride powder can be prevented from blocking screening holes; specifically, when needs are to cleaing away the downthehole material that blocks up of screening, stop vibrating motor earlier, then first pneumatic cylinder extension, drive brush dish descends in order to stretch into the screening bucket, finally makes brush hair and screening dish butt, then starts first drive part, rotate with the drive brush dish, rotate the brush hair and clear away the downthehole material that blocks up of screening, thereby dredge the screening hole of screening dish, when carrying out powder screening with solving current sieving mechanism, the sieve mesh often can be blocked up by the material problem.

Description of the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of a powder sieving device with an anti-clogging function according to the present invention;

FIG. 2 is an enlarged view of detail A in FIG. 1;

FIG. 3 is an enlarged view of detail B in FIG. 1;

FIG. 4 is a schematic structural diagram of a closure assembly of an embodiment of the powder sieving device with anti-clogging function according to the present invention;

FIG. 5 is a schematic structural view of another state of a closure assembly of an embodiment of the powder sieving device with anti-clogging function according to the present invention;

FIG. 6 is a schematic structural diagram of a knocking component of an embodiment of the powder sieving device with the anti-clogging function provided by the invention.

In the figure, 110, an outer tank; 120. the top of the outer tank body; 130. screening the barrel; 140. a tub wall; 150. a collection hopper; 160. a feeding port; 170. a discharge hopper; 180. a closing plate; 190. a vibration motor; 210. knocking the cover; 220. a support ring; 230. a first spring; 240. a first connecting rod; 250. a second connecting rod; 260. positioning blocks; 270. a second hydraulic cylinder; 280. brushing a disc; 290. brushing; 310. a feed hopper; 320. a first tube; 330. a second tube; 340. screening a disc; 350. a first chute; 360. a second chute; 370. a first connecting arm; 380. a second connecting arm; 390. a first link; 410. a second link; 420. a third link; 430. a fourth link; 440. a first electromagnet; 450. a suction block; 460. a second spring; 470. a limiting strip; 480. a discharge port; 490. a first hydraulic cylinder; 510. a connecting frame; 520. a connecting seat; 530. a rotating shaft; 540. a first motor; 550. a first gear; 560. a second gear; 570. a second electromagnet; 580. a tapping rod; 590. a first baffle plate; 610. a second baffle; 620. a third spring; 630. a connecting plate; 640. sieving holes; 650. a belt; 660. a second motor; 670. a first pulley; 680. a second pulley; 690. a standpipe.

Detailed Description

The invention provides a powder screening device with an anti-blocking function.

Referring to fig. 1 to 6, the present invention provides a powder screening device with an anti-jamming function, which includes an outer tank 110, a collecting hopper 150, a screening barrel 130, a vibration motor 190, a feeding hopper 310, a feeding pipe, a discharging hopper 170, a brush plate 280, a first hydraulic cylinder 490, a connecting seat 520, a rotating shaft 530 and a first driving part; the collecting hopper 150 is communicated with the lower part of the outer tank 110; a feed opening 160 is formed in the bottom of the aggregate bin 150, and the screened materials are discharged through the feed opening 160; the sieving barrel 130 is disposed in the outer tank 110; the screening barrel 130 comprises a barrel wall 140 arranged in a ring shape, and a screening disc 340 arranged at the bottom of the barrel wall 140; the screening plate 340 is provided with screening holes 640; the vibration motor 190 is disposed on the outer wall of the tub wall 140; the feeding pipe is arranged at the top of the outer tank body 110 in a penetrating way; the feed hopper 310 is communicated with a feed pipe; the feed hopper 310 is used for placing the material to be sieved, which enters the sieving barrel 130 through the feed pipe; the discharge hopper 170 is arranged on the side wall of the outer tank 110 in a penetrating way; the discharge hopper 170 is used for receiving the remaining material on the screening plate 340 after the screening is completed.

The base of the first hydraulic cylinder 490 is arranged at the inner top of the outer tank 110; the telescopic direction of the first hydraulic cylinder 490 is the vertical direction; the central axis of the sieving barrel 130 is collinear with the central axis of the outer tank 110, and the central axis of the sieving barrel 130 is arranged vertically; the connecting base 520 is connected to the telescopic end of the first hydraulic cylinder 490; the rotating shaft 530 is rotatably disposed on the connecting seat 520; the first driving part is used for driving the rotating shaft 530 to rotate; the bottom end of the rotating shaft 530 is connected with a brush disc 280; the brush plate 280 is positioned above the sieving barrel 130, and bristles 290 are arranged at the bottom of the brush plate 280; the brush plate 280 is adapted to extend into the sieving barrel 130 to unclog the sieving holes 640.

When the powder screening device with the anti-blocking function provided by the invention is used for screening silicon nitride powder, the silicon nitride powder can be prevented from blocking the screening holes 640; specifically, when the material that blocks up in the sieve hole 640 needs to be cleared away, stop vibrating motor 190 earlier, then first pneumatic cylinder 490 extension, drive brush dish 280 descends in order to stretch into sieve bucket 130, finally make brush 290 and sieve dish 340 butt, then start first drive component, rotate brush dish 280, rotate brush 290 and clear away the material that blocks up in the sieve hole 640, thereby dredge sieve hole 640 of sieve dish 340, when solving current sieving mechanism and carrying out powder screening, the sieve mesh often can be stopped up by the material problem.

Further, as shown in fig. 1, the brush plate 280 is horizontally disposed, and the brush plate 280 and the rotation shaft 530 share a central axis; the rotating shaft 530 and the sieving barrel 130 share a central axis; the outer diameter of the brush plate 280 is smaller than the inner diameter of the sieving barrel 130, and the difference between the outer diameter of the brush plate 280 and the inner diameter of the sieving barrel 130 is smaller than a preset value (for example, 2 mm), so that the brush 290 can cover more sieving plates 340 while the brush plate 280 can be embedded in the sieving barrel 130; the first hydraulic cylinder 490 and the rotating shaft 530 share a central axis; the telescopic end of the first hydraulic cylinder 490 is connected to the connecting seat 520 through the connecting frame 510; the rotational axis of the shaft 530 and the brush plate 280 are coaxial.

Meanwhile, the first driving part includes a first motor 540, a first gear 550 and a second gear 560; the rotating shaft 530 is rotatably arranged through the connecting seat 520 through a tapered roller bearing; the rotating shaft 530 is coaxially sleeved with a first gear 550; the first motor 540 is disposed on the connecting seat 520; the second gear 560 is coaxially connected to the output shaft of the first motor 540; the first gear 550 and the second gear 560 are engaged; the number of teeth of the first gear 550 is greater than the second number of teeth, and the outer diameter of the first gear 550 is greater than the outer diameter of the second gear 560. Through the technical scheme, the structure and the function of the first driving part are perfected, namely the first motor 540 drives the rotating shaft 530 to rotate, so that the brush disc 280 is driven to rotate.

In addition, as shown in fig. 1, 4 and 5, the powder sieving device with anti-blocking function further includes a support ring 220, a first connecting rod 240, a second connecting rod 250, a second hydraulic cylinder 270 and a closing assembly; a discharge port 480 is formed in one side of the barrel wall 140 close to the discharge hopper 170, and the discharge port 480 is used for discharging residual materials on the screening disc 340 after screening is completed; the closing component is used for closing or opening the discharge hole 480; one side of the discharge hopper 170 located at the outer tank 110 is located below the discharge port 480.

The bottom of the sieving barrel 130 is elastically connected to the support ring 220; the first connecting rod 240 and the second connecting rod 250 are respectively connected to two sides of the support ring 220, and the first connecting rod 240 and the second connecting rod 250 are symmetrical about the central axis of the support ring 220; the first connecting rod 240 is hinged to the inner side wall of the outer tank 110; the rotating shaft of the support ring 220 is a horizontal shaft, and the rotating shaft of the support ring 220 is perpendicular to the first connecting rod 240; the base of the second hydraulic cylinder 270 is hinged to the inner side wall of the outer tank 110; the telescopic end of the second hydraulic cylinder 270 is hinged to the second connecting rod 250; the rotation axis of the second hydraulic cylinder 270 relative to the outer tank 110 is parallel to the rotation axis of the support ring 220 relative to the outer tank 110; the base of the second hydraulic cylinder 270 is lower than the support ring 220.

Through the technical scheme, when finishing a screening, when needing to discharge the residual material on the screening disc 340, the accessible second hydraulic cylinder 270 drives the support ring 220 to rotate, thereby making the screening bucket 130 incline, i.e. the second connecting rod 250 is higher than the first connecting rod 240, thereby being convenient for the residual material in the screening bucket 130 to be discharged from the discharge port 480 under the effect of dead weight, thereby dropping out the hopper 170, and then discharging to the outside through the discharge hopper 170.

Meanwhile, the powder screening device with the anti-blocking function further comprises a first spring 230; the first connecting rod 240 and the second connecting rod 250 share a central axis; the support ring 220 is parallel to the sieving disc 340, and the support ring 220 and the sieving disc 340 share a central axis; the number of the first springs 230 is plural; the plurality of first springs 230 are uniformly arranged between the supporting ring 220 and the bottom of the sieving disc 340 in an annular shape; one end of the first spring 230 is connected to the bottom of the sifting tray 340; the other end of the first spring 230 is connected to the support ring 220. By providing the plurality of first springs 230, the sieving barrel 130 can be more conveniently vibrated by the driving of the vibration motor 190 to sieve the materials.

In addition, as shown in fig. 1, the powder sieving device with the anti-blocking function further includes a positioning block 260; the positioning block 260 is disposed on the inner sidewall of the outer tank 110; the positioning block 260 is used for abutting against the second connecting rod 250; when the positioning block 260 abuts against the second connecting rod 250, the support ring 220 is in a horizontal state.

Through setting up locating piece 260, make locating piece 260 support second connecting rod 250 to support ring 220, the normal work of guarantee screening bucket 130.

Meanwhile, as shown in fig. 1, 4 and 5, the closing assembly includes a closing plate 180, a first connecting arm 370, a second connecting arm 380, a second spring 460, a suction block 450 and a first electromagnet 440; the closing plate 180 is an arc-shaped plate; a first chute 350 and a second chute 360 which are parallel to each other are arranged on the two sides of the discharge port 480 of the barrel wall 140, and the extending direction of the first chute 350 is parallel to the central axis of the screening disc 340; one side of the closing plate 180 is slidably inserted into the first sliding groove 350, and the other side of the closing plate 180 is slidably inserted into the second sliding groove 360, so that the closing plate 180 is in sliding fit with and contacts the outer wall of the barrel wall 140; the first connecting arm 370 and the second connecting arm 380 are both connected to the outer wall of the tub wall 140, the first connecting arm 370 is located above the second connecting arm 380; the first connecting arm 370 is located on a side of the closure plate 180 facing away from the tub wall 140; the second attachment arm 380 is located on a side of the closure plate 180 facing away from the tub wall 140.

The closing plate 180 is provided with a suction block 450 at a side facing away from the tub wall 140; the engaging block 450 is located between the first connecting arm 370 and the second connecting arm 380; one end of the second spring 460 is connected to the suction block 450, and the other end of the second spring 460 is connected to the second connecting arm 380; the second spring 460 is in a stretching state, so that the closing plate 180 has a downward sliding tendency, so that the closing plate 180 closes the discharge hole 480; the first electromagnet 440 is disposed at a side of the first connection arm 370 facing the engaging block 450; the first electromagnet 440 is used for attracting the attraction block 450, so that the closing plate 180 opens the discharge hole 480.

A limit strip 470 is arranged on one side of the closing plate 180, which is far away from the suction block 450; the spacing bar 470 is parallel to the upper edge of the tub wall 140; the position limiting strip 470 is used for abutting against the upper edge of the barrel wall 140, and when the position limiting strip 470 abuts against the upper edge of the barrel wall 140, the closing plate 180 closes the discharge port 480.

Under normal conditions, the first electromagnet 440 is de-energized, and under the pulling action of the second spring 460, the limit strip 470 abuts against the upper edge of the barrel wall 140, so that the closing plate 180 closes the discharge port 480 (shown in fig. 4); when the remaining material on the sieving plate 340 needs to be discharged, the first electromagnet 440 electrically attracts the attraction block 450, so as to drive the closing plate 180 to ascend, thereby exposing the discharge port 480, i.e., the closing plate 180 opens the discharge port 480 (shown in fig. 5).

In addition, the closure assembly further includes a first link 390, a second link 410, a third link 420, and a fourth link 430; the first link 390, the second link 410, the third link 420 and the fourth link 430 are connected to the outer wall of the tub wall 140; the first link 390, the second link 410, the third link 420, and the fourth link 430 are parallel to each other; the first link 390 and the third link 420 are located on one side of the closure plate 180; the second link 410 and the fourth link 430 are located on the other side of the closing plate 180; both ends of the first link arm 370 are connected to the first link 390 and the second link 410, respectively; both ends of the second link arm 380 are connected to the third link 420 and the fourth link 430, respectively; by means of the arrangement, the structure and the function of the sealing assembly are perfected.

Meanwhile, as shown in fig. 1 and 3, a vertical pipe 690 is connected to the bottom of the feeding hopper 310; the feed pipe includes a first pipe 320 and a second pipe 330 communicating with each other; the first pipe 320 is rotatably arranged on the top of the outer tank 110 through a tapered roller bearing; the central axis of the first pipe 320 is arranged vertically; the second pipe 330 communicates with the bottom of the first pipe 320; the second pipe 330 is disposed to be inclined with respect to the first pipe 320, and the bottom of the second pipe 330 is positioned between the sieving tub 130 and the brush plate 280; the vertical pipe 690 is embedded in the first pipe 320, and the vertical pipe 690 is vertically arranged; the standpipe 690 and the first tube 320 share a common central axis; the outer wall of the standpipe 690 is in sliding, fitting contact with the inner wall of the first tube 320; a support rod (not shown) for fixing the feed hopper 310 is provided between the feed hopper 310 and the top of the outer tank 110; the screening device further comprises a second drive member for driving the first tube 320 in rotation.

By the arrangement, the feed pipe can be prevented from interfering the normal work of the brush disc 280, when the feed is needed, the first hydraulic cylinder 490 drives the brush disc 280 to ascend to the highest position, then the second driving part drives the first pipe 320 to rotate, and further drives the second pipe 330 to rotate, so that the bottom of the second pipe 330 is finally positioned between the sieving barrel 130 and the brush disc 280, and the outlet of the second pipe 330 faces the sieving barrel 130; the material may then be fed into the feed hopper 310, through the feed hopper 310, the first tube 320, and the second tube 330, and finally into the sizing barrel 130.

When the sieving holes 640 of the sieving plate 340 need to be dredged, the second driving part drives the first pipe 320 to rotate again, and then drives the second pipe 330 to rotate, so that the bottom of the second pipe 330 is no longer located between the sieving barrel 130 and the brush plate 280, and thus the brush plate 280 can normally descend and extend into the sieving barrel 130.

Specifically, the second driving part includes a first pulley 650, a second motor 660, a second pulley 650 and a belt 650; the first belt 650 is coaxially sleeved on the first pipe 320; the first belt 650 is positioned above the outer tank 110; the second motor 660 is arranged at the top of the outer tank 110; the second belt 650 is coaxially connected to the output shaft of the second motor 660; the belt 650 is tightly sleeved on the first belt 650 wheel and the second belt 650 wheel; the diameter of the second pulley 650 is smaller than the diameter of the first pulley 650. Through the technical scheme, the structure and the function of the second driving part are perfected.

In addition, as shown in fig. 1 and fig. 6, the powder screening with the anti-clogging function also comprises a knocking component; the knocking assembly comprises a knocking cover 210, a third spring 620, a connecting plate 630, a knocking rod 580, a first baffle 590, a second baffle 610 and a second electromagnet 570; the knocking cover 210 covers the outer wall of the barrel wall 140; the connecting plate 630 is arranged in the knocking cover 210; the connecting plate 630 is vertically arranged; the knocking rod 580 axially slides through the connecting plate 630; the tapping rod 580 is horizontally disposed; one end of the knocking rod 580 is vertically connected with a first baffle 590; the knocking rod 580 is coaxially sleeved with a second baffle 610; the first baffle 590 is parallel to the second baffle 610, and the first baffle 590 is parallel to the connection plate 630; the first baffle 590 and the second baffle 610 are located at both sides of the connection plate 630, and the first baffle 590 is located at a side of the connection plate 630 facing away from the tub wall 140; the knocking rod 580 is sleeved with the third spring 620; one end of the third spring 620 is connected to the connection plate 630; the other end of the third spring 620 is connected to the second stopper 610; the third spring 620 is in a compressed state, so that the knocking rod 580 abuts against the outer wall of the barrel wall 140; the second electromagnet 570 is arranged on the inner side wall of the knocking cover 210 far away from the barrel wall 140; the second electromagnet 570 is used for attracting the first baffle 590; when the second electromagnet 570 attracts the first blocking plate 590, the tapping rod 580 is separated from the tub wall 140.

By arranging the knocking component, firstly, when the screening barrel 130 vibrates for screening work, the barrel wall 140 can be knocked intermittently to prevent materials from blocking the screening holes 640; secondly, when the remaining materials on the screening tray 340 need to be discharged, the barrel wall 140 can be knocked intermittently, so that the remaining materials in the screening barrel 130 can be discharged from the discharge port 480, and the falling materials are discharged out of the hopper 170 and then discharged to the outside through the hopper 170. The specific working principle is as follows: the second electromagnet 570 is intermittently started and stopped, the second electromagnet 570 attracts the first baffle 590 in a reciprocating mode, and the knocking rod 580 is made to knock the outer wall of the barrel wall 140 in a reciprocating mode under the action of the third spring 620.

Claims

1. A powder screening device with an anti-blocking function is characterized by comprising an outer tank body, a collecting hopper, a screening barrel, a vibration motor, a feeding hopper, a feeding pipe, a discharging hopper, a brush disc, a first hydraulic cylinder, a connecting seat, a rotating shaft and a first driving part; the collecting hopper is communicated with the lower part of the outer tank body; the bottom of the aggregate bin is provided with a feed opening; the screening barrel is arranged in the outer tank body; the screening barrel comprises a barrel wall arranged in an annular mode and a screening disc arranged at the bottom of the barrel wall; the screening disc is provided with screening holes; the vibration motor is arranged on the outer wall of the barrel wall; the feeding pipe penetrates through the top of the outer tank body; the feed hopper is communicated with the feed pipe; the feed hopper is used for placing materials to be screened, and the materials to be screened enter the screening barrel through the feed pipe; the discharge hopper is arranged on the side wall of the outer tank body in a penetrating way; the discharge hopper is used for receiving the residual materials on the screening disc after the screening is finished; the base of the first hydraulic cylinder is arranged at the inner top of the outer tank body; the telescopic direction of the first hydraulic cylinder is a vertical direction; the central axis of the screening barrel is collinear with the central axis of the outer tank body, and the central axis of the screening barrel is vertically arranged; the connecting seat is connected to the telescopic end of the first hydraulic cylinder; the rotating shaft is rotatably arranged on the connecting seat; the first driving part is used for driving the rotating shaft to rotate; the bottom end of the rotating shaft is connected with the brush disc; the brush disc is positioned above the screening barrel, and bristles are arranged at the bottom of the brush disc; the brush disc is used for extending into the screening barrel so as to dredge the screening holes.

2. The powder screening device with the anti-blocking function according to claim 1, wherein the brush disc is horizontally arranged, and the brush disc and the rotating shaft share a central axis; the rotating shaft and the screening barrel share a central axis; the outer diameter of the brush disc is smaller than the inner diameter of the screening barrel, and the difference value between the outer diameter of the brush disc and the inner diameter of the screening barrel is smaller than a preset value; the first hydraulic cylinder and the rotating shaft share a central axis; the telescopic end of the first hydraulic cylinder is connected to the connecting seat through a connecting frame; the rotating shaft of the rotating shaft and the brush disc share a central axis.

3. The powder screening device with anti-clogging function according to claim 1, wherein the first driving member includes a first motor, a first gear and a second gear; the rotating shaft is rotatably arranged in the connecting seat in a penetrating way through a tapered roller bearing; the rotating shaft is coaxially sleeved with the first gear; the first motor is arranged on the connecting seat; the second gear is coaxially connected with the output shaft of the first motor; the first gear and the second gear are meshed; the number of teeth of the first gear is larger than that of the second gear, and the outer diameter of the first gear is larger than that of the second gear.

4. The powder screening device with the anti-clogging function according to claim 1, further comprising a support ring, a first connecting rod, a second hydraulic cylinder and a sealing assembly; a discharge hole is formed in one side, close to the discharge hopper, of the barrel wall; the sealing component is used for sealing or opening the discharge hole; one side of the discharge hopper, which is positioned on the outer tank body, is positioned below the discharge port; the bottom of the screening barrel is elastically connected to the support ring; the first connecting rod and the second connecting rod are respectively connected to two sides of the support ring, and are symmetrical about the central axis of the support ring; the first connecting rod is hinged to the inner side wall of the outer tank body; the rotating shaft of the support ring is a horizontal shaft, and is perpendicular to the first connecting rod; the base of the second hydraulic cylinder is hinged to the inner side wall of the outer tank body; the telescopic end of the second hydraulic cylinder is hinged to the second connecting rod; the rotating shaft of the second hydraulic cylinder relative to the outer tank body is parallel to the rotating shaft of the support ring relative to the outer tank body; the base of the second hydraulic cylinder is lower than the support ring.

5. The powder screening device with anti-clogging function according to claim 4, further comprising a first spring; the first connecting rod and the second connecting rod share a central axis; the support ring is parallel to the screening disc, and the support ring and the screening disc share a central axis; the number of the first springs is multiple; the first springs are uniformly arranged between the support ring and the bottom of the screening disc in an annular mode; one end of the first spring is connected to the bottom of the screening disc; the other end of the first spring is connected to the support ring.

6. The powder screening device with the anti-clogging function according to claim 4, further comprising a positioning block; the positioning block is arranged on the inner side wall of the outer tank body; the positioning block is used for being abutted against the second connecting rod; when the positioning block is abutted to the second connecting rod, the support ring is in a horizontal state.

7. The powder screening device with the anti-clogging function according to claim 4, wherein the closing assembly comprises a closing plate, a first connecting arm, a second spring, an attraction block and a first electromagnet; the closing plate is an arc-shaped plate; a first sliding groove and a second sliding groove which are parallel to each other are formed in the two sides of the discharge hole of the barrel wall, and the extending direction of the first sliding groove is parallel to the central axis of the screening disc; one side of the closing plate is slidably embedded into the first sliding groove, and the other side of the closing plate is slidably embedded into the second sliding groove, so that the closing plate is in sliding fit contact with the outer wall of the barrel wall; the first connecting arm and the second connecting arm are both connected to the outer wall of the barrel wall, and the first connecting arm is positioned above the second connecting arm; the first connecting arm is located on a side of the closure plate facing away from the tub wall; the second connecting arm is positioned on one side of the closing plate, which is far away from the barrel wall; the side, away from the barrel wall, of the closing plate is provided with the suction block; the suction block is positioned between the first connecting arm and the second connecting arm; one end of the second spring is connected to the suction block, and the other end of the second spring is connected to the second connecting arm; the second spring is in a stretching state, so that the closing plate has a downward sliding tendency, and the closing plate closes the discharge hole; the first electromagnet is arranged on one side, facing the attraction block, of the first connecting arm; the first electromagnet is used for attracting the attraction block so as to enable the closing plate to open the discharge hole.

8. The powder screening device with anti-clogging function of claim 7, wherein the closure assembly further comprises a first link, a second link, a third link and a fourth link; the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are all connected to the outer wall of the barrel wall; the first, second, third, and fourth links are parallel to one another; the first and third links are located on one side of the closure panel; the second connecting rod and the fourth connecting rod are positioned on the other side of the closing plate; two ends of the first connecting arm are respectively connected to the first connecting rod and the second connecting rod; two ends of the second connecting arm are respectively connected to the third connecting rod and the fourth connecting rod; a limiting strip is arranged on one side of the closing plate, which is far away from the suction block; the limiting strip is parallel to the upper edge of the barrel wall; the limiting strip is used for being abutted to the upper edge of the barrel wall, and when the limiting strip is abutted to the upper edge of the barrel wall, the sealing plate seals the discharge hole.

9. The powder screening device with the anti-clogging function according to claim 1, wherein a vertical pipe is arranged at the bottom of the feed hopper in a communication manner; the feed pipe comprises a first pipe and a second pipe which are communicated with each other; the first pipe is rotatably arranged at the top of the outer tank body in a penetrating manner through a tapered roller bearing; the central axis of the first pipe is vertically arranged; the second pipe is communicated with the bottom of the first pipe; the second pipe is obliquely arranged relative to the first pipe; the vertical pipe is embedded in the first pipe and is vertically arranged; the vertical pipe and the first pipe share a central axis; the outer wall of the vertical pipe is in sliding fit contact with the inner wall of the first pipe; a supporting rod for fixing the feed hopper is arranged between the feed hopper and the top of the outer tank body; the screening device also comprises a second driving component for driving the first pipe to rotate.

10. The powder screening device with anti-clogging function according to claim 9, wherein said second driving member comprises a first pulley, a second motor, a second pulley and a belt; the first belt pulley is coaxially sleeved on the first pipe; the first belt pulley is positioned above the outer tank body; the second motor is arranged at the top of the outer tank body; the second belt pulley is coaxially connected to an output shaft of the second motor; the belt tensioning sleeve is arranged on the first belt pulley and the second belt pulley; the diameter of the second belt pulley is smaller than the diameter of the first belt pulley.