阅读说明：本技术 一种化肥布袋除尘装置 (Chemical fertilizer sack dust collector ) 是由 王晓春 罗冬贵 蒋振华 王景岱 于 2021-10-28 设计创作，主要内容包括：本发明涉及一种化肥布袋除尘装置,包括壳体,其特征在于,所述的壳体下端开口,壳体内固定有一个隔板,隔板上沿竖直方向均布有多个第一通孔,第一通孔有滑杆,每个滑杆上均有一个环形板,环形板上固定有一个两端开口的圆柱形布袋,布袋一端开口固定在环形板外缘面,另一端开口固定在第一通孔内缘面上,每个环形板的左侧端面上均固定有一个圆形板,当环形板移动至最右侧将布袋拉紧时,圆形板能脱离环形板沿滑杆向左移出布袋,当环形板向左滑动至最左端圆形板能重新与环形板固定；本发明通过电磁铁的换向带动布袋在腔体内左右滑动,与圆形板和刷筒配合,使不用取下布袋便能对堵塞物进行不停机清扫,大大提高布袋过滤效率和清扫效率。(The invention relates to a chemical fertilizer cloth bag dust removal device, which comprises a shell and is characterized in that the lower end of the shell is provided with an opening, a partition plate is fixed in the shell, a plurality of first through holes are uniformly distributed in the partition plate along the vertical direction, each first through hole is provided with a slide rod, each slide rod is provided with an annular plate, a cylindrical cloth bag with openings at two ends is fixed on each annular plate, one end opening of each cloth bag is fixed on the outer edge surface of each annular plate, the other end opening of each cloth bag is fixed on the inner edge surface of each first through hole, a circular plate is fixed on the left end surface of each annular plate, when the annular plates move to the rightmost side to tighten the cloth bags, the circular plates can be separated from the annular plates and move out of the cloth bags along the slide rods to the left, and when the annular plates slide to the rightmost end to the left, the circular plates can be fixed with the annular plates again; the invention drives the cloth bag to slide left and right in the cavity by reversing the electromagnet, and the cloth bag is matched with the circular plate and the brush barrel, so that the blockage can be cleaned without stopping the machine without taking off the cloth bag, and the cloth bag filtering efficiency and the cleaning efficiency are greatly improved.)

1. A chemical fertilizer cloth bag dust removal device comprises a closed shell (1) and is characterized in that the lower end of the shell (1) is open, an air inlet (6) is formed in the left side wall of the shell (1), an air outlet (3) is formed in the right side wall of the shell (1), a partition plate (5) is fixed in the shell (1), an inner cavity of the shell is uniformly divided into a left cavity and a right cavity by the partition plate (5), the left cavity and the right cavity are in a mutually isolated and sealed state, a plurality of first through holes (13) are uniformly distributed in the partition plate (5) along the vertical direction, a sliding rod (14) is coaxially arranged in each first through hole (13), the left end and the right end of each sliding rod (14) are fixed on the shell (1), each sliding rod (14) is provided with a ring-shaped plate (22) capable of sliding left and right, a cylindrical cloth bag (21) with two open ends is fixed on the ring-shaped plate (22), one end of the cloth bag (21) is open and fixed on the outer edge surface of the ring-shaped plate (22), the opening at the other end is fixed on the inner edge surface of the first through hole (13), a circular plate (24) is fixed on the left end surface of each annular plate (22), the circular plate (24) can slide left and right on the sliding rod (14), when the annular plates (22) slide right from the left cavity of the shell (1) on the sliding rod (14), the cloth bag (21) and the circular plate (24) can be driven to move into the right cavity of the shell (1) through the first through hole (13), when the annular plates (22) move rightmost to tension the cloth bag (21), the circular plates (24) can be separated from the annular plates (22) and move out of the cloth bag (21) leftwards along the sliding rod (14), the interior of the cloth bag is cleaned, and when the annular plates (22) slide leftmost to the left end, the circular plates (24) can be fixed with the annular plates (22) again.

2. The cloth bag dust collector for chemical fertilizers, as recited in claim 1, wherein each annular plate (22) is fixed with an annular magnet (23), the inner cavity surfaces of the left and right sides of the casing (1) are fixed with an electromagnet (11), when the cloth bag is blocked, the magnetic performance of the electromagnet (11) is reversed, and the electromagnet (11) always attracts or repels the annular magnet (23).

3. The dust removal device for the fertilizer cloth bag as defined in claim 2, wherein a pressure sensor (7) is fixed in the left cavity of the casing (1), the pressure sensor (7) controls the current direction of the electromagnet (11), and the electromagnet (11) can be magnetically reversed by the pressure sensor (7) when the left cavity of the casing (1) is positively pressurized.

4. The cloth bag dust collector for chemical fertilizers as recited in claim 2, wherein the left side of the annular plate (22) is provided with an upper and a lower grooves (28), the opening of each groove (28) is fixed with a cover plate (29), the axial position of the cover plate (29) is provided with a through hole, one side of the cover plate (29) close to the groove (28) is fixed with an annular cylinder (30), the side wall of the annular cylinder (30) is provided with an upper and a lower round holes, the round holes are internally provided with spheres (31), the inside diameter of the round holes on the annular cylinder (30) is smaller than the diameter of the spheres (31), the outside diameter is larger than the diameter of the spheres (31), so that the spheres (31) can move inwards without separating from the round holes and can separate from the round holes, each groove (28) is internally provided with a metal cylindrical shell-shaped gland (32) with an open left end, the gland (32) is made of magnetic material and can slide left and right in the groove (28), a spring (33) is connected between the gland (32) and the bottom surface of the groove (28), the diameter of the inner edge surface of each gland (32) is larger than that of the outer edge surface of the annular cylinder (30), the corresponding gland (32) can be sleeved on the annular cylinder (30) and the ball body (31) can be compressed by the extension of the spring (33), the gland (32) can be separated from the annular cylinder (30) by the contraction of the spring (33), and the ball body (31) is not compressed;

every circular plate (24) is gone up and is fixed with two bolt (38) respectively with recess (28) position correspondence, and when circular plate (24) and annular plate (22) laminating, bolt (38) can insert in annular section of thick bamboo (30), spherical groove (39) have been seted up respectively to both sides about bolt (38) tip, and when spheroid (31) compressed tightly the round hole bottom at annular section of thick bamboo (20), spheroid (31) can be arranged in spherical groove (39) and make bolt (38) fix in annular section of thick bamboo (30).

5. The dust removal device for the fertilizer cloth bag according to claim 4, wherein the sliding rod (14) is provided with a sinking groove, the annular plate (22) and the circular plate (24) are respectively fixed with a protruding block, and the protruding blocks can be arranged in the sinking grooves of the sliding rod (14), so that the annular plate (22) and the circular plate (24) do not rotate around the axis of the circular plate (24) when sliding left and right on the sliding rod (14), and the plug pin (38) can be accurately inserted into the annular cylinder (30) when the circular plate (24) is attached to the annular plate (22).

6. The cloth bag dust collector for chemical fertilizers as recited in claim 1, wherein a light spring (26) is fixed at the left end of each circular plate (24), and the other end of the light spring (26) is fixed at the left end face of the shell (1).

7. The fertilizer cloth bag dust removal device as claimed in claim 1, wherein a brush cylinder is coaxially and rotatably mounted in the cavities at the two sides of the partition plate (5) on the first through hole (13), the brush cylinder comprises two coaxial circular rings (17) and a plurality of connecting rods (18) which are uniformly distributed on the circumference and connected between the two circular rings (17), brush bristles are arranged on one side of each connecting rod (18) close to the axis of the corresponding circular ring (17), and the outer side surface of the cloth bag (21) after movement can be rotatably cleaned by the brush cylinders in the corresponding side cavities.

8. The dust removal device for the fertilizer cloth bag according to claim 7, wherein a vertically placed support plate (15) is fixed in cavities at the left side and the right side of the partition plate (5), second through holes (16) corresponding to the first through holes (13) one by one are formed in the support plate (15), the left end and the right end of the sliding rod (14) penetrate through the corresponding second through holes (16) and are fixed on the shell (1), one end, far away from the partition plate (5), of the brush cylinder is rotatably installed on the support plate (15) at the corresponding side through a circular ring (17), the cloth bag (21), the annular plate (22) and the circular plate (24) are all located inside the brush cylinder, an annular driven belt wheel (19) is coaxially arranged between the two circular rings (17) on the brush cylinder, the driven belt wheel (19) is fixed on the connecting rod (18), a direct current motor (12) is fixed on the upper surface of the outer side of the shell (1), two driving belt wheels are installed on an output shaft of the direct current motor (12), belts (20) are installed on the two driving belt wheels, the other ends of the belts (20) extend into the shell (1), the two belts (20) are located in the left cavity and the right cavity respectively, the belts (20) are in contact with driven belt wheels (19) on the brush drum corresponding to the sides, and when the motor (12) rotates, the motor (12) enables the brush drum to rotate through driving the belts (20).

9. The fertilizer cloth bag dust removal device as claimed in claim 7, wherein the end of the air outlet (3) in the cavity is fixed with a filter screen (8), the baffle (5) is provided with a rotating rod (9) in a left-right rotating manner, one end of the rotating rod (9) is connected with a belt (20), the belt (20) can drive the rotating rod (9) to rotate, one end of the rotating rod (9) close to the filter screen (8) is fixed with a scraper, and when the rotating rod (9) rotates, the scraper can clean the filter screen (8).

10. The dust removal device for the fertilizer cloth bag according to claim 1, wherein the lower end opening of the casing (1) is a funnel-shaped opening gradually converging from top right to bottom, a baffle (4) is hinged to the opening, the baffle (4) can be rotated to close the lower end opening of the casing (1), and when the baffle (4) closes the lower end opening of the casing (1), the baffle (5) is in contact with the upper end face of the baffle (4).

Technical Field

The invention relates to the field of fertilizer production, in particular to a cloth bag dust removal device for a fertilizer.

Background

Chemical fertilizer is in process of production, need dry, dry mode lets in steam toward the cylinder in, steam weathers the chemical fertilizer, then moisture and chemical fertilizer dust in the gas area chemical fertilizer leave the cylinder, gas after the drying all filters through the sack cleaner at present stage, but because the moisture that contains in the gas is many, the sack cleaner uses after the period, the chemical fertilizer dust can be the caking on the sack, block up the sack, it is more difficult to clear up with the brush, the cleaning efficiency is low, influence dust collection efficiency, simultaneously because the long-time dust removal of sack, the chemical fertilizer dust can enter into inside the sack, it only can clear up to stop the machine and pull down the sack to get into the inside dust of sack, when influencing work, the cleaning process is also very troublesome.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a bag-type dust collector for a chemical fertilizer, which solves the problem that dust on a bag is hard to clean.

The technical scheme for solving is that the dust removing device for the fertilizer cloth bag comprises a closed shell and is characterized in that the lower end of the shell is open, the left side wall of the shell is provided with an air inlet and the right side wall of the shell is provided with an air outlet, a partition plate is fixed in the shell and divides an inner cavity of the shell into a left cavity and a right cavity which are in a mutually isolated and sealed state, a plurality of first through holes are uniformly distributed on the partition plate along the vertical direction, a sliding rod is coaxially arranged in each first through hole, the left end and the right end of the sliding rod are fixed on the shell, each sliding rod is provided with a ring-shaped plate capable of sliding left and right, a cylindrical cloth bag with openings at two ends is fixed on the ring-shaped plate, one end of the cloth bag is fixed on the outer edge surface of the ring-shaped plate, the other end of the cloth bag is fixed on the inner edge surface of the first through hole, and a circular plate is fixed on the left end surface of each ring-shaped plate, the circular plate can slide from left to right on the slide bar, when the annular plate slides from casing left side cavity to right on the slide bar, can drive sack and circular plate and pass first through-hole and remove in the casing right side cavity, when the annular plate removed to the rightmost side with the sack taut, the circular plate can break away from the annular plate and shift out the sack left along the slide bar to clear up the sack is inside, slide left to the leftmost end circular plate when the annular plate can be fixed with the annular plate again.

Each annular plate is fixed with an annular magnet, the inner cavity surfaces of the left side and the right side of the shell are fixed with electromagnets, when the cloth bag is blocked, the magnetic performance of the electromagnets is reversed, and the electromagnets attract or repel the annular magnets all the time.

A pressure sensor is fixed in the cavity on the left side of the shell, the pressure sensor controls the current direction of the electromagnet, and the electromagnet can be switched magnetically through the pressure sensor when the cavity on the left side of the shell is positively pressurized.

The left side surface of the annular plate is provided with an upper groove and a lower groove, the opening part of each groove is fixed with a cover plate, the axis position of the cover plate is provided with a through hole, one side of the cover plate close to the groove is fixed with an annular cylinder, the side wall of the annular cylinder is provided with an upper round hole and a lower round hole, a ball is placed in each round hole, the inside diameter of each round hole on the annular cylinder is smaller than the diameter of the ball, the outside diameter of each round hole on the annular cylinder is larger than the diameter of the ball, the ball can not be separated from the round holes and can be separated from the round holes by moving outwards, each groove is internally provided with a metal cylindrical shell-shaped gland with an opening at the left end, the gland is made of magnetic material and can slide left and right in the groove, a spring is connected between the gland and the bottom surface of the groove, the diameters of the inner edge surfaces of all the glands are larger than the diameter of the outer edge surface of the annular cylinder, the spring can be sleeved on the annular cylinder by the corresponding gland by extending of the spring and can be tightly pressed by the ball, the spring by contracting the spring, the ball is not being compressed;

the round plate is fixed with two bolts corresponding to the groove respectively, when the round plate is attached to the ring plate, the bolts can be inserted into the ring-shaped cylinder, the upper side and the lower side of the end part of each bolt are respectively provided with a spherical groove, and when the ball is pressed at the bottom of the round hole of the ring-shaped cylinder, the ball can be arranged in the spherical grooves and fixed in the ring-shaped cylinder.

The slide bar on seted up the heavy groove, all be fixed with the lug on annular plate and the circular slab, the lug can be arranged in the slide bar heavy groove, does not rotate around self axis when making annular plate and circular slab slide about on the slide bar, when guaranteeing that circular slab and annular slab laminating, the bolt can accurately insert in the annular cylinder.

And when the circular plate is separated from the annular plate, the circular plate can move leftwards under the action of the tensile force of the light spring.

The first through hole on lie in the equal coaxial rotation in the cavity of baffle both sides and install a brush section of thick bamboo, a brush section of thick bamboo includes that two coaxial rings and two rings are connected with a plurality of connecting rods of circumference equipartition between, one side that the connecting rod is close to the ring axis all is equipped with the brush hair, lateral surface homoenergetic after the sack removed is cleared up by the brush section of thick bamboo rotation in the corresponding side cavity.

The cavity of the left side and the cavity of the right side of the clapboard are both fixed with a vertically placed support plate, the support plates are both provided with second through holes which are in one-to-one correspondence with the first through holes, the left end and the right end of the slide bar pass through the corresponding second through holes to be fixed on the shell, one end of the brush cylinder far away from the clapboard is rotatably arranged on the support plate of the corresponding side through a circular ring, the cloth bag, the circular plate and the circular plate are all positioned inside the brush cylinder, an annular driven belt wheel is coaxially arranged between the two circular rings on the brush cylinder, the driven belt wheel is fixed on the connecting rod, a direct current motor is fixed on the upper surface of the outer side of the shell, two driving belt wheels are arranged on the output shaft of the direct current motor, belts are arranged on the two driving belt wheels, the other ends of the belts extend into the shell, the two belts are respectively positioned in the left cavity and the right cavity, the belts are both contacted with the driven belt wheels on the brush cylinder of the corresponding side, when the motor rotates, the motor drives the belt to rotate the brush drum.

The one end that the gas outlet is located the cavity be fixed with the filter screen, a dwang is installed in the rotation about on the baffle, dwang one end is connected with the belt, the dwang can be driven by the belt and rotate, the one end that the dwang is close to the filter screen is fixed with the scraper blade, when the dwang rotates, the scraper blade can clear up the filter screen.

The opening at the lower end of the shell is a funnel-shaped opening which is gradually folded from the upper right to the lower right, a baffle is hinged to the opening position, the opening at the lower end of the shell can be closed by rotating the baffle, and when the opening at the lower end of the shell is closed by the baffle, the baffle is in contact with the upper end face of the baffle.

According to the invention, the cloth bag is driven to slide left and right in the cavity by reversing the electromagnet, the blockage surface is scraped by the circular plate while the blockage is cleaned by turning and folding the cloth bag, and the blockage surface is cleaned by the brush barrel, so that the blockage can be cleaned without stopping the machine without taking off the cloth bag, and the cloth bag filtering efficiency and the cleaning efficiency are greatly improved.

Drawings

Fig. 1 is a front view of the present invention.

FIG. 2 is a front sectional view of the present invention.

Fig. 3 is a partial view a of fig. 2 of the present invention.

Fig. 4 is a partial view B of fig. 3 of the present invention.

Fig. 5 is a state diagram after the electromagnet of the present invention is magnetically switched.

Fig. 6 is a partial view C of fig. 5 of the present invention.

Fig. 7 is a partial view D of fig. 6 of the present invention.

Fig. 8 is a partial view E of fig. 5 of the present invention.

Fig. 9 is a perspective view of a circular plate of the present invention.

FIG. 10 is a perspective view of a brush cartridge of the present invention.

Fig. 11 is a perspective view of the combination of the cover plate and the annular cylinder of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

As shown in the figures 1 to 11, the invention comprises a closed shell 1, and is characterized in that the lower end of the shell 1 is open, the right side wall of the left side wall of the shell 1 is provided with an air inlet 6 and is provided with an air outlet 3, a partition plate 5 is fixed in the shell 1, the inner cavity of the shell is divided into a left cavity and a right cavity by the partition plate 5, the left cavity and the right cavity are in a mutually isolated and sealed state, a plurality of first through holes 13 are uniformly distributed on the partition plate 5 along the vertical direction, a sliding rod 14 is coaxially arranged in each first through hole 13, the left end and the right end of the sliding rod 14 are fixed on the shell 1, each sliding rod 14 is provided with a ring plate 22 capable of sliding left and right, a cylindrical cloth bag 21 with openings at two ends is fixed on the ring plate 22, one end opening of the cloth bag 21 is fixed on the outer edge surface of the ring plate 22, the other end opening is fixed on the inner edge surface of the first through hole 13, a circular plate 24 is fixed on the left end surface of each ring plate 22, the circular plate 24 can slide left and right on the sliding rod 14, when the annular plate 22 slides right on the sliding rod 14 from the left cavity of the shell 1, the cloth bag 21 and the circular plate 24 can be driven to move into the right cavity of the shell 1 through the first through hole 13, when the annular plate 22 moves rightmost to strain the cloth bag 21, the circular plate 24 can be separated from the annular plate 22, move out of the cloth bag 21 leftwards along the sliding rod 14 and clean the inside of the cloth bag, and when the annular plate 22 slides leftmost to the leftmost end, the circular plate 24 can be fixed with the annular plate 22 again.

Each annular plate 22 is fixed with an annular magnet 23, the inner cavity surfaces of the left side and the right side of the shell 1 are fixed with electromagnets 11, when the cloth bag is blocked, the magnetic performance of the electromagnets 11 is reversed, and the electromagnets 11 attract or repel the annular magnets 23 all the time.

The left cavity of the shell 1 is internally fixed with a pressure sensor 7, the pressure sensor 7 controls the current direction of the electromagnet 11, and the electromagnet 11 can be magnetically reversed through the pressure sensor 7 when the left cavity of the shell 1 is positively pressurized.

The left side surface of the annular plate 22 is provided with an upper groove 28 and a lower groove 28, the opening of each groove 28 is fixed with a cover plate 29, the axis position of the cover plate 29 is provided with a through hole, one side of the cover plate 29 close to the groove 28 is fixed with an annular cylinder 30, the side wall of the annular cylinder 30 is provided with an upper round hole and a lower round hole, a sphere 31 is arranged in each round hole, the diameter of the inner side of each round hole on the annular cylinder 30 is smaller than that of the sphere 31, the diameter of the outer side of each round hole is larger than that of the sphere 31, the sphere 31 can not be separated from the round holes by moving inwards, a metal cylindrical shell-shaped gland 32 with an opening at the left end is arranged in each groove 28, the gland 32 is made of magnetic material and can slide left and right in the groove 28, a spring 33 is connected between the bottom surface of the gland 32 and the bottom surface of the groove 28, the diameter of the inner edge surface of all the glands 32 is larger than that of the outer edge surface of the annular cylinder 30, the spring 33 can extend to enable the corresponding gland 32 to be sleeved on the annular cylinder 30, the ball 31 is pressed, the spring 33 contracts to enable the gland 32 to be separated from the annular cylinder 30, and the ball 31 is not pressed;

two bolts 38 are respectively fixed on each circular plate 24 corresponding to the positions of the grooves 28, when the circular plate 24 is attached to the circular plate 22, the bolts 38 can be inserted into the circular cylinder 30, the upper side and the lower side of the end of each bolt 38 are respectively provided with a spherical groove 39, when the sphere 31 is tightly pressed on the bottom of the circular hole of the circular cylinder 20, the sphere 31 can be placed in the spherical groove 39, and the bolts 38 are fixed in the circular cylinder 30.

The slide bar 14 is provided with a sinking groove, the annular plate 22 and the circular plate 24 are both fixed with a protruding block, and the protruding block can be arranged in the sinking groove of the slide bar 14, so that the annular plate 22 and the circular plate 24 do not rotate around the axis of the circular plate when sliding left and right on the slide bar 14, and the bolt 38 can be accurately inserted into the annular cylinder 30 when the circular plate 24 is attached to the annular plate 22.

A light spring 26 is fixed at the left end of each circular plate 24, the other end of the light spring 26 is fixed at the left end surface of the shell 1, and after the circular plate 24 is separated from the annular plate 22, the circular plate 24 can move leftwards under the tension of the light spring 26.

The first through hole 13 is internally provided with a brush barrel which is coaxially and rotatably arranged in the cavities at the two sides of the partition plate 5, the brush barrel comprises two coaxial circular rings 17 and a plurality of connecting rods 18 which are uniformly distributed on the circumference and connected between the two circular rings 17, one side of each connecting rod 18, which is close to the axis of the circular ring 17, is provided with brush bristles, and the outer side surface of the cloth bag 21 after moving can be rotatably cleaned by the brush barrel in the corresponding side cavity.

A vertically placed support plate 15 is fixed in the cavities at the left and right sides of the clapboard 5, second through holes 16 corresponding to the first through holes 13 one by one are arranged on the support plate 15, the left and right ends of a slide rod 14 pass through the corresponding second through holes 16 and are fixed on the shell 1, one end of a brush cylinder far away from the clapboard 5 is rotatably installed on the support plate at the corresponding side through a circular ring 17, a cloth bag 21, a circular plate 22 and a circular plate 24 are all positioned in the brush cylinder, an annular driven belt wheel 19 is coaxially arranged between the two circular rings 17 on the brush cylinder, the driven belt wheel 19 is fixed on a connecting rod 18, a direct current motor 12 is fixed on the upper surface at the outer side of the shell 1, two driving belt wheels are installed on the output shaft of the direct current motor 12, belts 20 are installed on the two driving belt wheels, the other ends of the belts 20 extend into the shell 1, and the two belts 20 are respectively positioned in the left and right cavities, the belt 20 is contacted with the driven belt wheel 19 on the brush drum on the corresponding side, and when the motor 12 rotates, the motor 12 drives the belt 20 to rotate the brush drum.

Gas outlet 3 is located the one end in the cavity and is fixed with filter screen 8, controls to rotate on baffle 5 and installs a dwang 9, dwang 9 one end is connected with belt 20, belt 20 can drive dwang 9 and rotate, dwang 9 is close to the one end of filter screen 8 and is fixed with the scraper blade, when dwang 9 rotates, the scraper blade can clear up filter screen 8.

The opening at the lower end of the shell 1 is a funnel-shaped opening which gradually folds from top right to bottom, the opening position is hinged with a baffle 4, the baffle 4 can be rotated to close the opening at the lower end of the shell 1, and when the baffle 4 closes the opening at the lower end of the shell 1, the partition plate 5 is in contact with the upper end face of the baffle 4.

It is worth mentioning that the inner diameter of the circular plate 24 is equal to the inner diameter of the cloth bag 21.

When the invention is used, the electromagnets 11 and the motor 12 on the left and right sides are electrified, in an initial state, the left electromagnet 11 attracts the annular magnet 23, the right electromagnet 11 repels the annular magnet 23, the annular plate 22 is fixed in the left cavity of the partition plate 5 by magnetic force, the gland 34 can be attracted by the electromagnet 11 due to the magnetic material of the gland 34, the spring 33 is stretched and the ball 31 is compressed, the bolt 38 is compressed in the annular cylinder 30, the circular plate 24 is fixed with the annular plate 22, the light spring 26 is compressed, the motor 12 rotates to drive the belt 20 in the left cavity to rotate, gas to be filtered is introduced from the air inlet 6, the gas is filtered by the cloth bag 21, the belt 20 drives the brush cylinder to rotate, the brush cylinder cleans the outer side surface of the cloth bag 21, the filtered gas enters the right cavity through the outlet of the cloth bag 21 and is discharged out of the shell through the filter screen 8 and the air outlet, the part of the dust in the cloth bag 21 which is brought out by the gas is filtered by the filter screen 8;

when the outer surface of the cloth bag 21 has fertilizer caking and dust is stored in the cloth bag 21, gas in a left cavity cannot be discharged in time, the left cavity of the partition plate 5 is pressurized positively, the pressure sensor 7 controls the input current of the electromagnet 11 to be reversed, at the moment, the left electromagnet 11 repels the annular magnet 23, the right electromagnet 11 attracts the annular magnet 23, the annular magnet 23 drives the cloth bag 21 to move towards the right cavity on the slide rod 14, in the moving process, the cloth bag 21 is gradually folded, the fertilizer caking on the outer side surface of the cloth bag 21 is squeezed off, the annular magnet 23 drives the circular plate 24, the annular plate 22 and the cloth bag 21 to pass through the first through hole 13 on the partition plate 5 and move into the right cavity, when the annular magnet 23 moves to the rightmost side of the slide rod 14, the cloth bag 21 is turned over, at the rotary cloth bag of the right brush can clean the outer side surface of the cloth bag 21, and the dust left on the outer side surface of the cloth bag 21 falls into the right cavity, meanwhile, the gland 32 is attracted by the right electromagnet 11, the spring 33 is compressed, the gland 32 is not pressed on the sphere 31, the left circular plate 24 is pulled leftwards under the action of the left light spring 26 to be separated from the annular plate 22, the inner side surface of the cloth bag 21 after being turned over is cleaned in the process that the left circular plate 24 moves leftwards, and the left circular plate 24 is pulled to the left side of the partition plate 5 by the left light spring 26;

continuously introducing gas to be filtered, introducing the gas from the opening of the cloth bag 21, discharging the gas from the side wall of the cloth bag 21, keeping dust filtered by the cloth bag 21 inside the cloth bag 21, when the cloth bag 21 is seriously blocked, controlling the electromagnet 11 and the motor 12 to reverse again by the pressure sensor 7, driving the annular plate 22 and the cloth bag 21 to slide leftwards to pass through the first through hole 13 by the annular magnet 23, turning the cloth bag 21 over again by folds, shaking off the chemical fertilizer particles blocked on the cloth bag 21 from the cavity on the left side of the partition plate 5, cleaning the outer surface of the cloth bag 21 by the brush barrel on the left side, enabling the chemical fertilizer particles which are not shaken off to fall until the annular plate 22 comes to the leftmost end, inserting the pin 39 on the circular plate 24 into the annular barrel 30 on the annular plate 22 to fix the circular plate 24 and the annular plate 22 together again, and repeating the processes after the cloth bag 21 is blocked again;

dwang 9 is rotatory all the time under belt 20's drive, and the scraper blade of dwang 9 right-hand member cleans filter screen 8 all the time, and the dust that places 5 right side cavities of baffle and drop blocks up filter screen 8, and through long-time use, when 1 lower extreme deposit dust of casing is more, the accessible is opened baffle 4 and is the same discharge of dust in 1 lower part cavity of casing, makes things convenient for follow-up use.

According to the invention, the cavity is positively pressurized after the cloth bag 21 is blocked, the electromagnet 11 is magnetically reversed through the pressure sensor, the cloth bag is driven by the annular block 22 to move left and right, when the cloth bag 21 slides from left to right, dust on the inner side of the cloth bag 21 can fall off from the right cavity, the caked part on the outer side surface of the cloth bag 21 can fall off from the left cavity through the wrinkles of the cloth bag 21 and the scraping of the circular plate 24, when the cloth bag 21 slides from right to left, the caked part on the inner side surface of the cloth bag 21 can be overturned through the wrinkles of the cloth bag 21 and the cloth bag 21, and then cleaned through the brush cylinder and falls off from the left cavity, the input of gas to be filtered is not required to be stopped in the moving process of the cloth bag 21, the cloth bag 21 can be overturned without stopping the machine, and the device can clean the inner side surface and the outer side surface of the cloth bag 21 without the machine halt without disassembling the cloth bag 21;

because the gland 32 is made of magnetic material and is attracted by the magnetic force of the electromagnets 11 at two sides, the ball 31 can be pressed when the gland 32 is positioned in the left cavity by matching the ball 31 on the annular cylinder 30 with the gland 32, so that the annular plate 22 and the circular plate 24 are fixed together, the ball 31 is not pressed by the cover plate 32 when the gland 32 is positioned in the right cavity, and the ball 31 can move upwards, so that the circular plate 24 is separated from the annular plate 22 after receiving the tensile force of the light spring 26.