阅读说明：本技术 冶金铁合金炉烟气节能除尘装置 (Energy-saving dust removal device for flue gas of metallurgical ferroalloy furnace ) 是由 蓝远平 蓝远文 于 2021-07-19 设计创作，主要内容包括：本发明公开了冶金铁合金炉烟气节能除尘装置,其结构包括除尘箱、节能吸风机、脉冲器、连接管,除尘箱顶端与节能吸风机下表面螺栓固定,节能吸风机内部与脉冲器内部间隙配合,脉冲器整体与除尘箱表面嵌固连接,除尘箱右端与连接管末端法兰连接,除尘箱包括除尘滤袋筒、喷吹管、流通腔、灰斗,除尘滤袋筒上端与喷吹管下表面间隙配合,除尘滤袋筒底部与流通腔顶端活动配合,本发明通过驱动套柱对撞击盘进行带动,从而使角击块在旋转下由内部撞击条不间断的对过滤环内部进行撞击与挤压,使得堵塞在除尘滤袋筒表面孔洞上的灰尘在撞击下脱离,有效的解决了滤袋表面的净化孔洞被其灰尘堵塞,进而造成除尘效果降低,耗能对应增高问题。(The invention discloses an energy-saving dust removal device for flue gas of a metallurgical ferroalloy furnace, which structurally comprises a dust removal box, an energy-saving suction fan, a pulser and a connecting pipe, wherein the top end of the dust removal box is fixed with the lower surface of the energy-saving suction fan through bolts, the interior of the energy-saving suction fan is in clearance fit with the interior of the pulser, the whole pulser is fixedly embedded and connected with the surface of the dust removal box, the right end of the dust removal box is connected with the tail end of the connecting pipe through a flange, the dust removal box comprises a dust removal filter bag barrel, an injection pipe, a circulation cavity and an ash bucket, the upper end of the dust removal filter bag barrel is in clearance fit with the lower surface of the injection pipe, and the bottom of the dust removal filter bag barrel is movably matched with the top end of the circulation cavity. Thereby causing the problems of reduced dust removal effect and correspondingly increased energy consumption.)

1. Energy-conserving dust collector of metallurgical ferroalloy stove flue gas, its structure includes dust removal case (1), energy-conserving suction fan (2), pulser (3), connecting pipe (4), surface bolt fastening under dust removal case (1) top and energy-conserving suction fan (2), inside and pulser (3) inside clearance fit of energy-conserving suction fan (2), pulser (3) are whole to be connected with dust removal case (1) surface is inlayed admittedly, dust removal case (1) right-hand member and connecting pipe (4) end flange joint, its characterized in that:

dust removal case (1) is including a dust removal filter bag section of thick bamboo (11), jetting pipe (12), circulation chamber (13), ash bucket (14), dust removal filter bag section of thick bamboo (11) upper end and jetting pipe (12) lower surface clearance fit, dust removal filter bag section of thick bamboo (11) bottom and circulation chamber (13) top end clearance fit, circulation chamber (13) lower extreme and the whole clearance fit of ash bucket (14), ash bucket (14) upper end and dust removal filter bag section of thick bamboo (11) lower extreme clearance fit.

2. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 1, which is characterized in that: dust removal filter bag section of thick bamboo (11) are including striking dish (111), filter ring (112), drive socle (113), striking dish (111) center and drive socle (113) center clearance fit, drive socle (113) outer end and filter ring (112) inner wall clearance fit, filter ring (112) inner wall and striking dish (111) surface interference fit.

3. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 2, which is characterized in that: striking dish (111) including angle hit piece (a 1), connecting rod (a 2), auxiliary runner (a 3), power dish (a 4), angle hit piece (a 1) center and auxiliary runner (a 3) lower extreme meshing connection, auxiliary runner (a 3) top and connecting rod (a 2) top welded connection, connecting rod (a 2) terminal and power dish (a 4) surface welded connection, power dish (a 4) outer end and angle hit the whole clearance fit of piece (a 1).

4. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 3, characterized in that: the angle beating block (a 1) comprises a carrying groove (a 11), a block body (a 12), an engaging seat (a 13) and an impacting strip (a 14), wherein the carrying groove (a 11) is connected with the impacting strip (a 14) in an integrally clamped mode, the inner side of the impacting strip (a 14) is in integral clearance fit with the engaging seat (a 13), and the engaging seat (a 13) is integrally connected with the center of the block body (a 12) in an embedded mode.

5. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 1, which is characterized in that: ash bucket (14) move way (143), arrange grey valve (144) including scraping slide (141), elasticity stay cord (142), bucket wall, it is connected with elasticity stay cord (142) top embedded solid to wipe slide (141) both ends, elasticity stay cord (142) end and arrange grey valve (144) surface embedded solid to be connected, arrange grey valve (144) whole and bucket wall move the terminal screwed connection of way (143), bucket wall moves the inside and scrapes slide (141) whole sliding fit of way (143).

6. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 5, characterized in that: the scraping sliding seat (141) comprises a scraping block (b 1), a roller (b 2) and a carrier plate table (b 3), the lower end of the scraping block (b 1) is connected with the surface of the carrier plate table (b 3) in a welding mode, the surface of the carrier plate table (b 3) is integrally embedded and fixedly connected with the roller (b 2), and the upper end of the roller (b 2) is in clearance fit with the lower end of the scraping block (b 1).

7. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 6, characterized in that: the wiping sliding seat (141) comprises a wiping shovel plate (b 11), a shaking seat (b 12) and a supporting plate (b 13), the wiping shovel plate (b 11) is integrally hinged with the lower end of the supporting plate (b 13), the upper surface of the supporting plate (b 13) is fixedly embedded in the bottom of the shaking seat (b 12), and the lower end of the shaking seat (b 12) is in integral clearance fit with the wiping shovel plate (b 11).

8. The energy-saving and dust-removing device for the flue gas of the metallurgical ferroalloy furnace according to claim 7, which is characterized in that: wiping shovel board (b 11) including swing bolt (c 1), displacement groove (c 2), the board body (c 3), increase and hinder piece (c 4), wiping shovel board (b 11) whole and board body (c 3) top nested connection, board body (c 3) right side and displacement groove (c 2) inside activity block, board body (c 3) lower surface is connected with increasing the whole embedded solid of piece (c 4), increase and hinder piece (c 4) upper end and the whole clearance fit of swing bolt (c 1).

Technical Field

The invention relates to the field of flue gas energy-saving dust removal, in particular to a flue gas energy-saving dust removal device for a metallurgical ferroalloy furnace.

Background

The metallurgical ferroalloy furnace is a smelting furnace for melting ferroalloy, and a large amount of smoke and dust are generated in the ferroalloy smelting process, so that the dust is purified by a smoke energy-saving dust removal device, the amount of smoke dust discharged by the dust is changed, the pollution solubility to the outside atmosphere is reduced, and the national smoke discharge permission standard is reached;

however, the prior art has the following defects: energy-conserving dust collector of metallurgical ferroalloy stove flue gas at present, owing to connect metallurgical ferroalloy stove to remove dust to inside flue gas for flue gas in the in-process stove of work is along with floating dust adhesion on inside purification filter bag, thereby leads to the purification hole on filter bag surface to be blockked up by its dust, and then causes dust removal effect to reduce, and the power consumption corresponds and increases.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an energy-saving dust removal device for flue gas of a metallurgical ferroalloy furnace, and aims to solve the problems that in the prior art, the flue gas in the furnace is adhered to an internal purification filter bag along with floating dust in the working process due to the fact that the interior flue gas is dedusted by the metallurgical ferroalloy furnace, so that purification holes in the surface of the filter bag are blocked by the dust, the dust removal effect is reduced, and the energy consumption is correspondingly increased.

In order to achieve the purpose, the invention is realized by the following technical scheme: energy-conserving dust collector of metallurgical ferroalloy stove flue gas, its structure includes dust removal case, energy-conserving suction fan, pulser, connecting pipe, dust removal case top and energy-conserving suction fan lower surface bolt fastening, the inside and the inside clearance fit of pulser of energy-conserving suction fan, the pulser is whole to be connected with dust removal case surface is inlayed admittedly, dust removal case right-hand member and the terminal flange joint of connecting pipe, the dust removal case includes a dust removal filter bag section of thick bamboo, jetting pipe, circulation chamber, ash bucket, dust removal filter bag section of thick bamboo upper end and jetting pipe lower surface clearance fit, dust removal filter bag bobbin base portion and circulation chamber top clearance fit, the whole clearance fit of circulation chamber lower extreme and ash bucket, ash bucket upper end and dust removal filter bag section of thick bamboo lower end clearance fit.

The invention is further improved, the dust removal filter bag barrel comprises an impact disc, a filter ring and a driving sleeve column, the center of the impact disc is movably matched with the center of the driving sleeve column, the outer end of the driving sleeve column is in clearance fit with the inner wall of the filter ring, the inner wall of the filter ring is in interference fit with the surface of the impact disc, and the impact disc is distributed at the center of the driving sleeve column and is driven to rotate through the center of the driving sleeve column.

The invention is further improved, the impact disc comprises an angle impact block, a connecting rod, an auxiliary rotating wheel and a power disc, the center of the angle impact block is meshed with the lower end of the auxiliary rotating wheel, the top end of the auxiliary rotating wheel is welded with the top of the connecting rod, the tail end of the connecting rod is welded with the surface of the power disc, the outer end of the power disc is in clearance fit with the angle impact block integrally, the angle impact block is provided with three blocks, the angle impact block is integrally triangular and distributed at the lower end of the auxiliary rotating wheel, and the angle impact block is indirectly driven to rotate through the connecting rod.

The invention is further improved, the angle impact block comprises a carrying groove, a block body, an engagement seat and impact strips, the inside of the carrying groove is integrally clamped and connected with the impact strips, the inner sides of the impact strips are integrally in clearance fit with the engagement seat, the whole engagement seat is fixedly embedded and connected with the center of the block body, the impact strips are provided with three groups, each group is divided into two groups, and the whole impact strips are movably clamped and connected inside the carrying groove.

The invention is further improved, the ash bucket comprises a wiping slide seat, an elastic pull rope, a bucket wall moving channel and an ash discharge valve, wherein two ends of the wiping slide seat are fixedly connected with the top end of the elastic pull rope in an embedded mode, the tail end of the elastic pull rope is fixedly connected with the surface of the ash discharge valve in an embedded mode, the whole ash discharge valve is spirally connected with the tail end of the bucket wall moving channel, the inside of the bucket wall moving channel is in sliding fit with the wiping slide seat integrally, the wiping slide seat is distributed inside the bucket wall moving channel, two ends of the wiping slide seat are fixedly connected with the elastic pull rope of the bucket wall moving channel in an embedded mode, and the ash discharge valve is triggered by pulling of the elastic pull rope.

The invention is further improved, the scraping slide seat comprises a scraping block, a roller and a support plate table, the lower end of the scraping block is connected with the surface of the support plate table in a welding mode, the surface of the support plate table is integrally embedded and connected with the roller, the upper end of the roller is in clearance fit with the lower end of the scraping block, the roller is distributed on the surface of the support plate table and is embedded and connected with the surface of the support plate table, and the upper end of the roller is in clearance fit with the scraping block.

The invention is further improved, the wiping slide seat comprises a wiping shovel plate, a shaking seat and a support plate, the whole wiping shovel plate is hinged with the lower end of the support plate, the upper surface of the support plate is fixedly embedded with the bottom of the shaking seat, the lower end of the shaking seat is in clearance fit with the whole wiping shovel plate, the shaking seat is provided with three groups, the three groups of the shaking seat are evenly distributed on the upper surface of the support plate and fixedly embedded with the upper surface of the support plate, and the lower end of the shaking seat is in clearance fit with the support plate.

The cleaning shovel plate is further improved, the cleaning shovel plate comprises a swing bolt, a displacement groove, a plate body and resistance increasing blocks, the whole cleaning shovel plate is connected with the top of the plate body in an embedded mode, the right side of the plate body is movably clamped with the inside of the displacement groove, the lower surface of the plate body is integrally and fixedly connected with the resistance increasing blocks, the upper ends of the resistance increasing blocks are in clearance fit with the whole swing bolt, the number of the resistance increasing blocks is four, the resistance increasing blocks are evenly distributed on the lower surface of the plate body and fixedly connected with the lower surface of the plate body, and the upper ends of the resistance increasing blocks are in clearance fit with the swing bolt.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects;

1. according to the invention, the impact disc is driven by the driving sleeve column, so that the angle impact block is continuously impacted and extruded by the internal impact strip under rotation to separate dust blocked on the holes on the surface of the dust removal filter bag cylinder under impact, and the problems of reduced dust removal effect and correspondingly increased energy consumption caused by the fact that the purification holes on the surface of the filter bag are blocked by the dust are effectively solved.

2. According to the invention, through the expansion of the dust discharge valve, the elastic pull rope is driven to pull the scraping slide seat, so that the scraping block scrapes the inner surface of the bucket wall moving channel under the pulling action, and the shovel plate scrapes dust attached to the surface of the inner wall under the pressurization of the shaking seat and the resistance increasing action of the resistance increasing block in the process, so that the dust attached to the inner part of the ash bucket is effectively cleaned, and the internal dust is ensured to be discharged completely.

Drawings

FIG. 1 is a schematic structural view of the energy-saving and dust-removing device for flue gas of a metallurgical ferroalloy furnace of the invention.

FIG. 2 is a schematic view of the internal structure of the dust box of the present invention.

FIG. 3 is a schematic top view of the dust-removing filter bag cartridge of the present invention.

Fig. 4 is a schematic view of the internal structure of the impact disk of the present invention.

Fig. 5 is a schematic view of the internal structure of the angle striking block of the present invention.

FIG. 6 is a schematic view showing the internal structure of the ash bucket of the present invention.

FIG. 7 is a schematic view of the internal structure of the wiper carriage according to the present invention.

Fig. 8 is a schematic view of the internal structure of the scraping block of the present invention.

Fig. 9 is a schematic view of the internal structure of the wiping blade of the present invention.

In the figure: a dust removal box-1, an energy-saving suction fan-2, a pulser-3, a connecting pipe-4, a dust removal filter bag barrel-11, a blowing pipe-12, a circulating cavity-13, an ash bucket-14, an impact disc-111, a filter ring-112, a driving sleeve column-113, an angle impact block-a 1, a connecting rod-a 2, an auxiliary rotating wheel-a 3, a power disc-a 4, a carrying groove-a 11, a block body-a 12, an engagement seat-a 13, an impact strip-a 14, a scraping sliding seat-141, an elastic pull rope-142, a bucket wall moving channel-143, an ash discharge valve-144, a scraping block-b 1, a roller-b 2, a carrying plate table-b 3, a scraping shovel plate-b 11, a shaking seat-b 12, a supporting plate-b 13, a swinging bolt-c 1, a moving groove-c 2, a plate body-c 3, Resistance increasing block-c 4.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

The invention is further described below with reference to the accompanying drawings:

example 1

As shown in figures 1 to 5:

its structure includes dust removal case 1, energy-conserving suction fan 2, pulser 3, connecting pipe 4, 1 top of dust removal case and 2 lower surface bolt fastenings of energy-conserving suction fan, 2 inside and 3 inside clearance fit of pulser of energy-conserving suction fan, 3 whole and dust removal case 1 surfaces of pulser are inlayed solid and are connected, 1 right-hand member of dust removal case and 4 terminal flange connections of connecting pipe, dust removal case 1 is including dust removal filter bag section of thick bamboo 11, jetting pipe 12, circulation chamber 13, ash bucket 14, 11 upper ends of dust removal filter bag section of thick bamboo and 12 lower surface clearance fits of jetting pipe, 11 bottoms of dust removal filter bag section of thick bamboo and 13 top clearance fits in circulation chamber, 13 lower extremes in circulation chamber and 14 whole clearance fits in ash bucket, 14 upper ends of ash bucket and 11 lower extreme clearance fits in dust removal filter bag section of thick bamboo.

The dedusting filter bag cylinder 11 comprises an impact disc 111, a filter ring 112 and a drive sleeve column 113, the center of the impact disc 111 is movably matched with the center of the drive sleeve column 113, the outer end of the drive sleeve column 113 is in clearance fit with the inner wall of the filter ring 112, the inner wall of the filter ring 112 is in interference fit with the surface of the impact disc 111, the impact disc 111 is distributed at the center of the drive sleeve column 113 and is driven to rotate by the center of the drive sleeve column 113, and the filter ring 112 is favorable for separating, dedusting and purifying flue gas generated by a metallurgical ferroalloy furnace of the filter ring and accompanying dust in the flue gas, so that the flue gas emission standard is reached.

Wherein, striking dish 111 includes that the angle hits piece a1, connecting rod a2, assists runner a3, power disc a4, piece a1 center and the meshing of assisting runner a3 lower extreme are connected to the angle hit, assist runner a3 top and connecting rod a2 top welded connection, connecting rod a2 is terminal to be connected with power disc a4 surface welded connection, power disc a4 outer end and the whole clearance fit of angle hit piece a1, angle hit piece a1 is equipped with three, wholly is the triangle-shaped, distributes at auxiliary runner a3 lower extreme, and it is rotatory to drive indirectly through connecting rod a2, and wherein angle hits piece a1 and is favorable to realizing striking vibrations to the dust of adhesion on the filter bag ring inner wall to can shake off the dust for blocking up on filtering hole, avoid the dust jam to cause the dust removal effect to reduce.

The corner impact block a1 comprises a carrier groove a11, a block body a12, an engagement seat a13 and an impact strip a14, wherein the carrier groove a11 is integrally clamped and connected with the impact strip a14, the inner side of the impact strip a14 is in integral clearance fit with the engagement seat a13, the engagement seat a13 is integrally and fixedly connected with the center of the block body a12, the impact strips a14 are three groups, each group is two, and the carrier groove a11 is integrally and movably clamped, wherein the carrier groove a11 is beneficial to the uninterrupted impact on the inner wall of the filter bag, so that the probability that dust blocks the dust removal purification holes is reduced, the dust removal effect is effectively improved, and the energy consumption of equipment is reduced.

The specific working principle is as follows:

the invention connects with the smoke outlet of the metallurgical ferroalloy furnace through the connecting pipe 4 on the right side of the dust removing box 1, the smoke is sucked upwards through the matching energy-saving suction fan 2, the pulser 3 is matched with the blowing pipe 12 to blow large-particle dust downwards in the process, so that the large-particle dust enters the dust hopper 14 through the circulation cavity 13, the small-particle dust and the smoke enter the dust removing filter bag barrel 11 to carry out deep dust removal under the assistance of the internal filter ring 112, the internal driving sleeve column 113 drives the rotary striking disk 111 to rotate, so that the power disk a4 drives the welded connecting rod a2, the auxiliary rotary wheel a3 indirectly drives the angle striking block a1 fixed by the lower end meshing seat a13 to rotate, the irregular striking strip a14 clamped in the carrying groove a11 on the surface of the block a12 in the rotating process impacts and extrudes the inner wall of the filter ring 112, the dust blocked on the filter hole shakes and falls off, the striking disk 111 is driven by the driving sleeve column 113, therefore, the angle impact block a1 is rotated to impact and extrude the inside of the filter ring 112 continuously through the internal impact strip a14, so that dust blocked on the holes on the surface of the dust removal filter bag barrel 11 is separated under impact, and the problems that the purification holes on the surface of the filter bag are blocked by the dust, the dust removal effect is reduced, and the energy consumption is correspondingly increased are solved.

Example 2:

as shown in fig. 6 to 9:

the ash bucket 14 includes a scraping slide seat 141, an elastic pulling rope 142, a bucket wall moving channel 143, and an ash discharge valve 144, two ends of the scraping slide seat 141 are fixedly connected to the top end of the elastic pulling rope 142, the end of the elastic pulling rope 142 is fixedly connected to the surface of the ash discharge valve 144, the ash discharge valve 144 is integrally connected to the end of the bucket wall moving channel 143 in a screw manner, the bucket wall moving channel 143 is internally matched with the scraping slide seat 141 in a sliding manner, the scraping slide seat 141 is distributed inside the bucket wall moving channel 143, two ends of the scraping slide seat are fixedly connected to the elastic pulling rope 142, and the ash discharge valve 144 is triggered by pulling the elastic pulling rope 142, wherein the ash discharge valve 144 is beneficial to triggering the internal elastic pulling rope 142 when the discharged dust is spread, so as to drive the scraping slide seat 141 to scrape the sticky dust on the inner wall of the bucket wall moving channel 143.

The wiping slide seat 141 comprises a wiping block b1, a roller b2 and a carrier plate table b3, the lower end of the wiping block b1 is connected with the surface of the carrier plate table b3 in a welding mode, the surface of the carrier plate table b3 is integrally embedded and connected with the roller b2 in a fixed mode, the upper end of the roller b2 is in clearance fit with the lower end of the wiping block b1, the rollers b2 are distributed on the surface of the carrier plate table b3 and are embedded and connected with the surface of the carrier plate table b3, and the upper end of the roller b1 is in clearance fit with the wiping block b 3556, wherein the wiping block b1 is beneficial to displacement under the assistance of a connecting rod and the roller b2, and further removes dust attached to the inner wall of the wiping block b 1.

The scraping slide seat 141 comprises a scraping shovel plate b11, a shaking seat b12 and a support plate b13, the whole scraping shovel plate b11 is hinged to the lower end of the support plate b13, the upper surface of the support plate b13 is fixedly embedded to the bottom of the shaking seat b12, the lower end of the shaking seat b12 is in clearance fit with the whole scraping shovel plate b11, three groups of shaking seats b12 are arranged and evenly distributed on the upper surface of the support plate b13 and fixedly embedded to the upper surface of the support plate b13, and the lower end of the shaking seat b12 is in clearance fit with the support plate b13, so that the shaking seat b12 can shake in the shifting process, the inertia force of the scraping shovel plate b11 is improved, the force of the shovel plate for removing attached dust is increased, and the cleanness inside of the ash hopper is ensured.

The wiping shovel plate b11 comprises a swing bolt c1, a displacement groove c2, a plate body c3 and a resistance increasing block c4, the wiping shovel plate b11 is integrally connected with the top of the plate body c3 in a nested manner, the right side of the plate body c3 is movably clamped with the inside of the displacement groove c2, the lower surface of the plate body c3 is integrally fixedly connected with the resistance increasing block c4 in an embedded manner, the upper end of the resistance increasing block c4 is in integral clearance fit with the swing bolt c1, the resistance increasing blocks c4 are provided with four resistance increasing blocks, the four resistance increasing blocks are evenly distributed on the lower surface of the plate body c3 and are fixedly connected with the lower surface of the plate body c3 in an embedded manner, the upper ends of the resistance increasing blocks c4 are in clearance fit with the swing bolt c1, the friction increasing block c4 is favorable for increasing the friction force, so that the inner wall of the ash bucket can be attached to the inner wall of the ash bucket, and the shoveling effect is cleaner.

The specific working principle is as follows:

the invention triggers the internal elastic pull rope 142 in the process of opening the ash discharge valve 114 at the bottom of the ash bucket 14, so as to drive the scraping slide carriage 141 to move downwards, so that the roller b2 drives the scraping block b1 and the carrier plate table b3 to scrape on the outer surface of the bucket wall moving channel 143, the shaking seat b12 at the upper end of the support plate b13 is indirectly driven by the displacement to shake in the scraping process, the lower end of the support plate b11 is wiped to form downward pressure, so that the wiping blade b11 is more attached to the inner wall of the bucket wall moving channel 143, meanwhile, the swinging bolt c1 drives the plate body c3 to enter the moving channel c2 to be clamped, the surface resistance increasing block c4 is matched with the wiping plate b11 to scrape on the inner wall surface of the bucket wall moving channel 143, and further removes the dust attached to the surface of the bucket wall moving channel 143, through the unfolding of the ash discharge valve 144, the elastic pull the scraping pull rope 142 to make the scraping slide carriage b1 wipe the inner surface of the bucket wall moving channel 143 under the pulling, in the process, the shovel plate b11 scrapes dust attached to the surface of the inner wall under the pressurization of the shaking seat b12 and the resistance increasing of the resistance increasing block c4, so that sticky dust attached to the inside of the dust hopper 14 is effectively cleaned, and the inside dust is ensured to be discharged completely.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein; any reference sign in a claim should not be construed as limiting the claim concerned.