CN115156036A

CN115156036A - Pneumatic vibrating powder sieving mechanism

Info

Publication number: CN115156036A
Application number: CN202210792496.5A
Authority: CN
Inventors: 方正; 方策; 陈朝晖; 宋路; 夏魏; 李晓威; 方芳; 方圆; 方丹
Original assignee: Zhejiang Canaan Technology Ltd
Current assignee: Zhejiang Canaan Technology Ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-10-11
Anticipated expiration: 2042-07-05
Also published as: CN115156036B

Abstract

The invention relates to the technical field of screening machines, and particularly discloses a pneumatic vibration type powder screening device; the screen comprises a conical hopper and a screen assembly, wherein a fixing ring is connected to the conical hopper, a first silica gel pad is arranged on the upper surface of the fixing ring, the screen assembly comprises a screen ring, a second silica gel pad is coated on the outer surface of the screen ring, a cross-shaped screen frame is connected to the screen ring, a screen is arranged on the upper surface of the cross-shaped screen frame, a first pneumatic vibrator is arranged at the center of the lower surface of the cross-shaped screen frame, a second pneumatic vibrator is arranged on the outer surface of the conical hopper, a hopper cover is connected to the upper end of the conical hopper, a feeding device extending into the upper side of the screen is connected to one side of the hopper cover, and a rotary material stirring mechanism acting on the upper surface of the screen is rotatably connected to the hopper cover; the powder screening device provided by the invention improves the material screening efficiency, effectively reduces the noise generated when the screen vibrates, can rapidly dredge the blocked screen under the action of high-pressure air, and has an excellent use effect.

Description

Pneumatic vibrating powder sieving mechanism

Technical Field

The invention relates to the technical field of screening machines, and particularly discloses a pneumatic vibration type powder screening device.

Background

In industrial production, the material generally needs to be subjected to primary crushing or screening, and particularly before powdery or granular materials are processed, the material is generally uniformly dispersed in a hopper so as to avoid the influence of agglomeration on post-treatment. Present material screening processing apparatus sets up for hopper and screen cloth combination to speed needs set up vibrating motor on the screen cloth in order to increase and sieve, but when sieving the processing to powdery material, the vibrating motor that its used adsorbs the dust, causes the potential safety hazard, and increases the noise that material screening speed often can lead to the during operation too big through the vibrating motor who sets up.

In addition, when the existing hopper and screen combined material screening treatment device screens powder, once caking and the like exist in the powder, the blockage of meshes on the screen is easily caused, and the manual shutdown is needed to dredge the screen at the moment, so that the labor intensity is high, the operation is complex, and the screening efficiency of the whole material is seriously influenced. Therefore, aiming at the defects of the existing hopper and screen combined material screening and processing device, the invention provides the pneumatic vibration type powder screening device which can effectively avoid or solve the technical problems.

Disclosure of Invention

The invention aims to provide a pneumatic vibration type powder screening device to solve the problems of the existing hopper and screen combined material screening and processing device in the process of screening and processing powder.

The invention is realized by the following technical scheme:

a pneumatic vibration type powder screening device comprises a conical hopper and a screen assembly, wherein a fixing ring is connected to the inner portion of the upper end of the conical hopper, a first silica gel pad is arranged on the upper surface of the fixing ring, the screen assembly comprises a screen body ring arranged above the first silica gel pad, a second silica gel pad wraps the outer surface of the screen body ring, a cross-shaped screen frame is connected in the screen body ring, a screen is arranged on the upper surface of the cross-shaped screen frame, a first pneumatic vibrator is mounted at the center of the lower surface of the cross-shaped screen frame, and a second pneumatic vibrator is arranged on the outer surface of the conical hopper;

the upper end of toper hopper is connected with the fill cover, one side of fill cover is connected with the loading attachment who stretches into the screen cloth top, rotate in the fill cover and be connected with the rotatory material mechanism of dialling that acts on the screen cloth upper surface.

As the concrete setting of above-mentioned scheme, rotatory kickoff constructs including the pivot, scrapes flitch subassembly and pneumatic drive subassembly, the pivot is rotated and is connected on the bearing of bucket cover centre of a circle department, the upper surface center department of cross screen frame is connected with inserts a section of thick bamboo, the diapire of inserting a section of thick bamboo has the bearing frame through first spring coupling, the lower extreme of pivot is provided with the protruding axle that is connected with the bearing frame, scrape the lower extreme of flitch subassembly radial connection in the pivot, the pneumatic drive subassembly sets up and is used for driving the pivot rotation at the upper surface of bucket cover.

As the specific arrangement of the scheme, the pneumatic driving assembly comprises a compressed air cover and a pneumatic impeller, the compressed air cover is connected to the upper surface of the bucket cover in a sealing mode, the pneumatic impeller is connected to the top end of the rotating shaft, and a compressed air inlet pipe is connected to the side face of the compressed air cover in a tangent mode.

As the further setting of above-mentioned scheme, inlet channel has been seted up along the axis direction in the pivot, and inlet channel's upper end opening setting, the sealed setting of lower extreme, the lower extreme of pivot is connected with a plurality of radial connecting pipes, and the tip and the inlet channel lower extreme of radial connecting pipe are linked together, the lower surface interval of radial connecting pipe is connected with a plurality of air nozzles, it is connected with radial connecting pipe through the connecting strip to scrape the flitch subassembly, be provided with the baffle in the compressed gas cover, the centre of a circle department of baffle is provided with seal bearing, seal bearing is passed on the top of pivot and is stretched into the inner chamber upper end of compressed gas cover, pneumatic impeller fixed connection is in the compressed gas cover inner chamber of baffle below, is located the blow vent has been seted up on the contralateral baffle of compressed gas inlet pipe.

As a specific arrangement of the scheme, the number of the radial connecting pipes connected with the lower end of the rotating shaft is 2-3, and the number of the air nozzles arranged on each radial connecting pipe is 3-5.

As a further arrangement of the scheme, the scraping plate assembly comprises an upper connecting strip and a scraping plate, a telescopic groove is formed in the lower surface of the upper connecting strip, an end strip located in the telescopic groove is connected to the upper end of the scraping plate, and a plurality of second springs are connected between the end strip and the top wall of the telescopic groove.

As a specific arrangement of the above scheme, the first pneumatic vibrator is a piston reciprocating pneumatic vibrator.

As a specific arrangement of the scheme, the second vibrators are turbine pneumatic vibrators, and the number of the second vibrators is two, and the two second vibrators are symmetrically arranged at two ends of the outer surface of the conical hopper.

As a further arrangement of the scheme, the upper surfaces of the two ends of the sieve ring are connected with the gripping parts.

As a further configuration of the above scheme, the feeding device includes a feeding hopper and a feeding barrel, the inner end of the feeding barrel extends into the hopper cover, a discharging pipe is arranged on the lower surface of the inner end of the feeding barrel, the feeding hopper is connected with the upper surface of the outer end of the feeding barrel, a feeding spiral blade is arranged in the feeding barrel, and a feeding motor connected with the feeding spiral blade is arranged on the outer end surface of the feeding barrel.

Has the advantages that:

1) According to the invention, the connection mode between the screen assembly and the hopper is changed into the butt joint between the silica gel pad and the silica gel pad, the piston reciprocating type pneumatic vibrator is arranged on the lower surface of the cross-shaped screen frame, the turbine pneumatic vibrator is arranged on the outer surface of the hopper, the pneumatic vibrator is connected to the cross-shaped screen frame, the vibration effect of the pneumatic vibrator is transmitted to the whole screen, and meanwhile, the turbine pneumatic vibrator can accelerate the blanking speed of screened materials along the inner wall of the hopper, so that the material screening efficiency is improved, and the noise generated when the screen vibrates is effectively reduced. In addition, the pneumatic vibrator is selected to replace the vibration motor, so that potential safety hazards caused by dust adsorption of the vibration motor can be effectively avoided, and the safety of equipment is greatly improved.

2) The pneumatic material stirring device is characterized in that the material stirring device comprises a rotary stirring mechanism, a material stirring mechanism and a pneumatic driving assembly, wherein the rotary stirring mechanism is arranged on the upper surface of the screen, the pneumatic driving assembly is arranged on the rotary stirring mechanism, and the material stirring mechanism is arranged on the upper surface of the screen.

3) The scraper is driven to rotate by high-pressure gas, and simultaneously, high-pressure air pressure can enter the radial connecting pipe along the gas inlet channel and then is sprayed out from the gas nozzles on the radial connecting pipe, and the sprayed high-pressure gas acts on the surface of the screen to flush down materials blocked on the screen, so that the dredging effect on the screen blockage is greatly improved, the scraper and the gas inlet channel synchronously rotate, and the dredging effect of the high-pressure gas is wide; the whole device has novel structural design, strong linkage and excellent use effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the internal plan structure of the present invention;

FIG. 3 is a schematic perspective view of a conical hopper and screen assembly according to the present invention;

FIG. 4 is a schematic perspective exploded view of the screen assembly of the present invention;

FIG. 5 is a schematic perspective view of a conical hopper according to the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 2 at A according to the present invention;

FIG. 8 is a schematic perspective view of a bucket cover, a rotary kick-out mechanism, and a loading device according to the present invention;

FIG. 9 is a schematic perspective view of the rotary kick-out mechanism of the present invention;

fig. 10 is an exploded perspective view of the scraper assembly of the present invention.

Wherein:

1-a conical hopper, 101-a fixed ring, 102-a first silica gel pad;

2-screen assembly, 201-screen ring, 202-cross screen frame, 203-screen, 204-grasping part;

3-a first pneumatic vibrator, 4-a second pneumatic vibrator and 5-a bucket cover;

6-feeding device, 601-feeding hopper, 602-feeding barrel, 603-discharging pipe, 604-feeding spiral blade, 605-feeding motor;

7-rotary material stirring mechanism, 701-rotating shaft, 7011-air inlet channel, 702-scraping plate assembly, 7021-upper connecting bar, 7022-scraping plate, 7023-telescopic groove, 7024-end bar, 7025-second spring, 703-pneumatic driving assembly, 7031-compressed air hood, 7032-pneumatic impeller, 7033-compressed air inlet pipe, 7034-partition plate, 7035-sealing bearing, 704-protruding shaft, 705-inserting cylinder, 7051-first spring, 706-bearing seat, 707-radial connecting pipe and 708-air nozzle.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 10, in conjunction with the embodiments.

Example 1

Embodiment 1 discloses a pneumatic vibrating powder sieving mechanism, refer to fig. 2, fig. 3, fig. 4 and fig. 5, this powder sieving mechanism's main part includes toper hopper 1 and screen assembly 2, the setting is narrow about the width on this toper hopper 1 to the welding has solid fixed ring 101 on the upper end open-ended inner wall of toper hopper 1, be provided with first silica gel pad 102 on solid fixed ring 101's upper surface simultaneously, be equipped with ring groove on this solid fixed ring 101 during specific setting, set up in inserting the draw-in groove with first silica gel pad 102, and first silica gel pad 102 upper end is the hemisphere shape.

This screen cloth assembly 2 has the second silica gel pad including setting up the screen frame ring 201 in first silica gel pad 102 top, and the surface cladding of screen frame ring 201 has moreover, through the butt effect between silica gel pad and the silica gel pad noise when can also effectively solving the vibration when guaranteeing the vibration effect. A cross-shaped screen frame 202 is connected to the screen body ring 201, and a screen 203 is provided on the upper surface of the cross-shaped screen frame 202. A first pneumatic vibrator 3 is mounted at the center of the lower surface of the cross-shaped screen frame 202, and the first pneumatic vibrator 3 is a piston reciprocating type pneumatic vibrator. The second pneumatic vibrator 4 is arranged on the outer surface of the conical hopper 1, the turbine pneumatic vibrator 4 is selected as the second vibrator 4, and the two second vibrators 4 are symmetrically arranged at two ends of the outer surface of the conical hopper 1 respectively.

In addition, in order to facilitate quick removal of the screen 203 from the upper surface of the cross frame 202, in this embodiment 1, grip portions 204 are connected to both upper surfaces of the screen body ring 201. When the screen 203 needs to be replaced or repaired, the screen 203 can be directly taken out by holding the grip portion 204 with hands.

Example 2

Embodiment 2 discloses powder sieving mechanism of quick mediation of pneumatic vibrating, refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, this powder sieving mechanism's main part includes toper hopper 1 and screen assembly 2, the setting of narrow width under this toper hopper 1, and the welding has solid fixed ring 101 on the upper end open-ended inner wall of toper hopper 1, the upper surface at solid fixed ring 101 is provided with first silica gel pad 102 simultaneously, be equipped with annular clamping groove on this solid fixed ring 101 during concrete setting, set up in inserting the draw-in groove with first silica gel pad 102, and first silica gel pad 102 upper end is the hemisphere shape.

This screen cloth assembly 2 has the second silica gel pad including setting up the screen frame ring 201 in first silica gel pad 102 top, in addition at the surface cladding of screen frame ring 201, through the butt effect between silica gel pad and the silica gel pad noise when guaranteeing vibration effect can also effectively solve the vibration. A cross-shaped screen frame 202 is connected to the screen body ring 201, and a screen 203 is provided on the upper surface of the cross-shaped screen frame 202. A first pneumatic vibrator 3 is mounted at the center of the lower surface of the cross-shaped screen frame 202, and the first pneumatic vibrator 3 is a piston reciprocating type pneumatic vibrator. The outer surface of the conical hopper 1 is provided with two second pneumatic vibrators 4, the second pneumatic vibrators 4 are turbine pneumatic vibrators, and the two second vibrators 4 are symmetrically arranged at two ends of the outer surface of the conical hopper 1 respectively. In order to facilitate quick removal of the screen 203 from the upper surface of the cross frame 202, grip portions 204 are connected to both end upper surfaces of the screen ring 201. When the screen 203 needs to be replaced or repaired, the screen 203 can be directly taken out by holding the grip portion 204 with hands.

In embodiment 2, a hopper cover 5 is further connected to the upper end of the conical hopper 1, and a feeding device 6 extending above the screen 203 is connected to one side of the hopper cover 5. When the feeding device 6 is specifically arranged, the feeding device comprises a feeding hopper 601 and a feeding barrel 602, the inner end of the feeding barrel 602 extends into the hopper cover 5, a discharging pipe 603 is arranged on the lower surface of the inner end of the feeding barrel 602, then the feeding hopper 601 is connected with the upper surface of the outer end of the feeding barrel 602, a feeding spiral blade 604 is arranged in the feeding barrel 602, and a feeding motor 605 connected with the feeding spiral blade 604 is arranged on the outer end surface of the feeding barrel 602. The feeding screw blade 604 is driven to rotate in the feeding barrel 602 by the action of the feeding motor 605, and then the powdery material is conveyed along the feeding barrel 602 by the action of the feeding screw blade 604, and finally discharged from the discharging pipe 603 and falls on the upper surface of the screen 203 for subsequent screening.

Referring to fig. 2, 6, 7 and 8, the present embodiment 2 further has a rotary kick-off mechanism 7 rotatably connected to the hopper cover 5 to act on the upper surface of the screen 203. The rotary kick-out mechanism 7 includes a rotating shaft 701, a scraper assembly 702, and a pneumatic driving assembly 703. The rotating shaft 701 is rotatably connected to a bearing at the center of the circle of the hopper cover 5, the center of the upper surface of the cross-shaped screen frame 202 is connected with an inserting cylinder 705, the bottom wall of the inserting cylinder 705 is connected with a first spring 7051, the upper end of the first spring 7051 is connected with a bearing seat 706 positioned in the inserting cylinder 705, and then the lower end of the rotating shaft 701 is provided with a protruding shaft 704 connected with the bearing seat 706. The scraper plate assembly 702 is radially coupled to the lower end of the rotating shaft 701.

When the pneumatic driving assembly 703 is specifically arranged, the pneumatic driving assembly 703 comprises a compressed air cover 7031 which is hermetically connected to the upper surface of the bucket cover 5 and a pneumatic impeller 7032 which is connected to the top end of the rotating shaft 701, and a compressed air inlet pipe 7033 is connected to the side surface of the compressed air cover 7031, so that the compressed air inlet pipe 7033 and the compressed air cover 7031 are tangentially arranged.

Referring to fig. 10, the scraping plate assembly 702 includes an upper connecting bar 7021 and a scraping plate 7022, a telescopic groove 7023 is formed on the lower surface of the upper connecting bar 7021, an end bar 7024 located in the telescopic groove 7023 is connected to the upper end of the scraping plate 7022, and a plurality of second springs 7025 are connected between the end bar 7024 and the top wall of the telescopic groove 7023.

The rotatory kickoff 7 that sets up in this embodiment 2 starts when the sieve mesh on screen cloth 203 blocks up, through advancing the pipe 7033 to compressed gas and letting in high-pressure gas, then high-pressure gas makes pivot 701 rotatory on being used in pneumatic impeller 7032, and the rotatory in-process of pivot 701 drives scraper bar subassembly 702 and also rotates pasting the upper surface of screen cloth 203, scraper bar 7022 is the powder homogeneous stand of caking at the upper surface of screen cloth 203 this moment, and certain crushing effect has, thereby make caking powder hopper can pass through screen cloth 203, prevent that the material from piling up and leading to screen cloth 203 to block up, certain mediation effect has.

Example 3

Embodiment 3 discloses powder sieving mechanism of pneumatic vibrating pulse gas mediation, refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, this powder sieving mechanism's main part includes toper hopper 1 and screen assembly 2, narrow setting about this toper hopper 1 is wide, and the welding has solid fixed ring 101 on the upper end open-ended inner wall of toper hopper 1, the upper surface at solid fixed ring 101 is provided with first silica gel pad 102 simultaneously, be equipped with ring groove on this solid fixed ring 101 during concrete setting, set up in inserting the draw-in groove with first silica gel pad 102, and first silica gel pad 102 upper end is the hemisphere shape.

This screen cloth assembly 2 has the second silica gel pad including setting up the screen frame ring 201 in first silica gel pad 102 top, and the surface cladding of screen frame ring 201 has moreover, through the butt effect between silica gel pad and the silica gel pad noise when can also effectively solving the vibration when guaranteeing the vibration effect. A cross-shaped screen frame 202 is connected to the screen body ring 201, and a screen 203 is provided on the upper surface of the cross-shaped screen frame 202. A first pneumatic vibrator 3 is mounted at the center of the lower surface of the cross-shaped screen frame 202, and the first pneumatic vibrator 3 is a piston reciprocating type pneumatic vibrator. The outer surface of the conical hopper 1 is provided with two second pneumatic vibrators 4, the second pneumatic vibrators 4 are turbine pneumatic vibrators, and the two second vibrators 4 are symmetrically arranged at two ends of the outer surface of the conical hopper 1 respectively. In order to facilitate quick removal of the screen 203 from the upper surface of the cross frame 202, grip portions 204 are connected to both end upper surfaces of the screen ring 201. When the screen 203 needs to be replaced or repaired, the screen 203 can be directly taken out by holding the grip portion 204 with hands.

In embodiment 3, a hopper cover 5 is further connected to the upper end of the conical hopper 1, and a feeding device 6 extending above the screen 203 is connected to one side of the hopper cover 5. When the feeding device 6 is specifically arranged, the feeding device comprises a feeding hopper 601 and a feeding barrel 602, the inner end of the feeding barrel 602 extends into the hopper cover 5, a discharging pipe 603 is arranged on the lower surface of the inner end of the feeding barrel 602, then the feeding hopper 601 is connected with the upper surface of the outer end of the feeding barrel 602, a feeding spiral blade 604 is arranged in the feeding barrel 602, and a feeding motor 605 connected with the feeding spiral blade 604 is arranged on the outer end surface of the feeding barrel 602. The feeding screw blade 604 is driven to rotate in the feeding barrel 602 by the action of the feeding motor 605, and then the powdery material is conveyed along the feeding barrel 602 by the action of the feeding screw blade 604, and finally discharged from the discharging pipe 603 and falls on the upper surface of the screen 203 for subsequent screening.

Referring to fig. 2, 6, 7 and 8, the present embodiment 3 also has a rotary kick-off mechanism 7 that acts on the upper surface of the mesh 203 rotatably attached to the hopper cover 5. The rotary kick-out mechanism 7 includes a rotating shaft 701, a scraper assembly 702, and a pneumatic driving assembly 703. The rotating shaft 701 is rotatably connected to a bearing at the center of the circle of the hopper cover 5, the center of the upper surface of the cross-shaped screen frame 202 is connected with an inserting cylinder 705, the bottom wall of the inserting cylinder 705 is connected with a first spring 7051, the upper end of the first spring 7051 is connected with a bearing seat 706 positioned in the inserting cylinder 705, and then the lower end of the rotating shaft 701 is provided with a protruding shaft 704 connected with the bearing seat 706. The scraper plate assembly 702 is radially coupled to the lower end of the rotating shaft 701.

When the pneumatic driving assembly 703 is specifically arranged, the pneumatic driving assembly 703 comprises a compressed gas cover 7031 which is hermetically connected to the upper surface of the bucket cover 5 and a pneumatic impeller 7032 which is connected to the top end of the rotating shaft 701, a compressed gas inlet pipe 7033 is connected to the side surface of the compressed gas cover 7031, and the compressed gas inlet pipe 7033 and the compressed gas cover 7031 are arranged in a tangential manner.

The rotatory material mechanism 7 of dialling that sets up in this embodiment 3 starts when the sieve mesh on screen cloth 203 blocks up, through advancing the pipe 7033 to compressed gas and letting in high-pressure gas, then high-pressure gas makes pivot 701 rotatory on being used in pneumatic impeller 7032, and the rotatory in-process of pivot 701 drives scraper bar subassembly 702 and also rotates pasting the upper surface of screen cloth 203, scraper bar 7022 is the powder homogeneous stand of caking at the upper surface of screen cloth 203 this moment, and have certain crushing effect, thereby make the caking powder can pass through screen cloth 203, prevent that the material from piling up and lead to screen cloth 203 to block up.

Referring to fig. 6, 8 and 9, in this embodiment 3, an air inlet passage 7011 is further formed in the rotating shaft 701 along the central axis direction, and the upper end of the air inlet passage 7011 is open and the lower end is sealed. A plurality of radial connecting pipes 707 are connected to the lower end of the rotating shaft 701, generally, two or three radial connecting pipes 707 are provided, and the end of each radial connecting pipe 707 is communicated with the lower end of the air inlet passage 7011, and then a plurality of air nozzles 708 are connected to the lower surface of each radial connecting pipe 707 at intervals, generally, between 3 and 5 air nozzles 708 are provided on each radial connecting pipe 707. The scraper plate assembly 702 is then connected to the radial connecting tube 707 by connecting strips 708.

Meanwhile, in this embodiment 3, a partition 7034 is further disposed in the compressed air hood 7031, a sealing bearing 7035 is disposed at a center of the partition 7034, and a top end of the rotating shaft 701 extends into an upper end of an inner cavity of the compressed air hood 7031 through the sealing bearing 7035. Then, the pneumatic impeller 7032 is fixedly connected in the inner cavity of the compressed gas cover 7031 below the partition 7034, and a vent is formed on the partition 7034 on the opposite side of the compressed gas inlet pipe 7033.

The rotary kick-out mechanism 7 designed in this embodiment 3 is further configured based on embodiment 2, when the compressed gas acts on the pneumatic impeller 7032 to rotate the rotating shaft 701, the compressed gas enters the upper end of the inner cavity of the compressed gas shield 7031 from the vent holes on the partition 7034, then enters the radial connecting pipes 707 along the gas inlet passages 7011, and finally is ejected from the gas nozzles 708. Therefore, in the rotating process of the whole scraper 7022, high-pressure gas is continuously sprayed from the gas nozzles 708 to the screen mesh 203, so that the blocked screen holes are broken, an effective dredging effect is realized, and the using effect of the whole device is greatly improved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pneumatic vibrating powder sieving mechanism, includes toper hopper (1) and screen cloth assembly (2), its characterized in that, the upper end internal connection of toper hopper (1) has solid fixed ring (101), the upper surface of solid fixed ring (101) is provided with first silica gel pad (102), screen cloth assembly (2) is including setting up screen frame ring (201) above first silica gel pad (102), and the surface cladding of screen frame ring (201) has the second silica gel pad, be connected with cross bank of screens (202) in screen frame ring (201), the upper surface of cross bank of screens (202) is provided with screen cloth (203), the lower surface center department of cross bank of screens (202) installs first pneumatic vibrator (3), the surface of toper hopper (1) is provided with second pneumatic vibrator (4);

the upper end of toper hopper (1) is connected with bucket cover (5), one side of bucket cover (5) is connected with loading attachment (6) that stretch into screen cloth (203) top, swivelling joint has rotatory kickoff mechanism (7) that act on screen cloth (203) upper surface in bucket cover (5).

2. The pneumatic vibrating powder screening device of claim 1, wherein the rotary material stirring mechanism (7) comprises a rotating shaft (701), a scraper component (702) and a pneumatic driving component (703), the rotating shaft (701) is rotatably connected to a bearing at the center of the hopper cover (5), an inserting cylinder (705) is connected to the center of the upper surface of the cross-shaped screen frame (202), a bearing seat (706) is connected to the bottom wall of the inserting cylinder (705) through a first spring (7051), a protruding shaft (704) connected with the bearing seat (706) is arranged at the lower end of the rotating shaft (701), the scraper component (702) is radially connected to the lower end of the rotating shaft (701), and the pneumatic driving component (703) is arranged on the upper surface of the hopper cover (5) and used for driving the rotating shaft (701) to rotate.

3. The pneumatic vibrating powder screening device according to claim 2, wherein the pneumatic driving assembly (703) comprises a compressed gas hood (7031) hermetically connected to the upper surface of the hopper hood (5) and a pneumatic impeller (7032) connected to the top end of the rotating shaft (701), and a compressed gas inlet pipe (7033) is tangentially connected to the side surface of the compressed gas hood (7031).

4. The pneumatic vibration type powder screening device according to claim 3, wherein an air inlet passage (7011) is formed in the rotating shaft (701) along the central axis direction, an upper end opening of the air inlet passage (7011) is formed, a lower end of the air inlet passage is sealed, the lower end of the rotating shaft (701) is connected with a plurality of radial connecting pipes (707), the end portions of the radial connecting pipes (707) are communicated with the lower end of the air inlet passage (7011), a plurality of air nozzles (708) are connected to the lower surface of the radial connecting pipes (707) at intervals, the scraper plate assembly (702) is connected with the radial connecting pipes (707) through connecting bars (708), a partition plate (7034) is arranged in the compressed air hood (7031), a sealing bearing (7035) is arranged at the center of the circle of the partition plate (7034), the top end of the rotating shaft (701) penetrates through the sealing bearing (7035) and extends into the upper end of the inner cavity of the compressed air hood (7031), the pneumatic impeller (7032) is fixedly connected in the inner cavity of the compressed air hood (7031) below the partition plate (7034), and an air vent hole is formed in the opposite side of the partition plate (7034) of the compressed air inlet pipe (7033).

5. A pneumatic vibrating powder lot screening apparatus according to claim 4, wherein the number of radial connecting pipes (707) connected to the lower end of said shaft (701) is 2 to 3, and the number of air nozzles (708) provided in each radial connecting pipe (707) is 3 to 5.

6. A pneumatic vibrating powder screening device according to any one of claims 2 to 5, wherein said scraper assembly (702) comprises an upper connecting bar (7021) and a scraper (7022), a telescopic groove (7023) is formed in the lower surface of said upper connecting bar (7021), an end bar (7024) positioned in the telescopic groove (7023) is connected to the upper end of said scraper (7022), and a plurality of second springs (7025) are connected between said end bar (7024) and the top wall of said telescopic groove (7023).

7. A pneumatic vibrating powder sifting apparatus according to claim 1, wherein said first pneumatic vibrator (3) is a piston reciprocating pneumatic vibrator.

8. A pneumatic vibrating powder sifting apparatus according to claim 1, wherein said second vibrator (4) is a turbine pneumatic vibrator, and two of said second vibrators (4) are provided and symmetrically installed at both ends of the outer surface of the conical hopper (1).

9. A pneumatically vibrating powder sifting device according to claim 1, wherein gripping portions (204) are attached to the upper surface of both ends of said sifter ring (201).

10. The pneumatic vibration type powder screening device of claim 1, wherein the feeding device (6) comprises a feeding hopper (601) and a feeding barrel (602), the inner end of the feeding barrel (602) extends into the hopper cover (5), a discharging pipe (603) is arranged on the lower surface of the inner end of the feeding barrel (602), the feeding hopper (601) is connected with the upper surface of the outer end of the feeding barrel (602), a feeding screw blade (604) is arranged in the feeding barrel (602), and a feeding motor (605) connected with the feeding screw blade (604) is arranged on the outer end surface of the feeding barrel (602).