Long-distance vacuum feeder and use method thereof

Abstract

The present invention relates to the field of vacuum conveying equipment, and in particular to a long-distance vacuum feeder and a method of using the same. The technical problem to be solved by the present invention is that when the material enters the vacuum hopper, the flow rate is relatively fast, which will continuously impact the interior of the vacuum hopper, causing serious wear of the vacuum hopper, shortening the service life of the vacuum hopper, and easily generating noise. It includes a vacuum hopper, the inner side of the vacuum hopper is fixedly connected to a support plate, the inner side of the support plate is fixedly connected to a plurality of pleated filter elements, a buffer mechanism is provided below the pleated filter element, a backflush mechanism is provided on the outer side of the vacuum hopper, two pipes are fixedly connected to both sides of the vacuum hopper, and a self-closing valve is fixedly connected to the middle of the pipe. The stirring impeller rotates to stir the material in the vacuum hopper to prevent the material from compacting and blocking the discharge port of the vacuum hopper, while eliminating the noise generated by the flow of the material, reducing equipment loss, and extending the service life of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of vacuum conveying equipment, and in particular to a long-distance vacuum feeder and a use method thereof. Background Art

[0002] Vacuum feeder, also known as vacuum conveyor, is a dust-free closed pipeline conveying equipment that uses vacuum suction to convey granular and powdered materials. Its working principle is mainly based on the vacuum negative pressure principle. The air is extracted from the pipeline and container through a vacuum pump to form a certain vacuum degree, and then the negative pressure generated by the vacuum is used to suck the material into the equipment and transport it to the target location through the pipeline.

[0003] Vacuum feeders play an increasingly important role in modern industrial production with their unique working principle and wide range of applications. In the prior art, when materials enter the vacuum hopper, the flow rate is relatively fast, which will continuously impact the interior of the vacuum hopper, causing serious wear of the vacuum hopper, shortening the service life of the vacuum hopper, and easily generating noise. Materials entering the vacuum hopper at high speed are prone to turbulence inside the vacuum hopper, causing material splashing and scattering. Since the material enters the hopper too fast, it is easy to form accumulation or blockage at the discharge port, affecting its subsequent fluidity and reducing production efficiency. Most vacuum feeders have a conveying distance of less than 10 meters, and the maximum production capacity is 5000kg / h. If the conveying distance exceeds 10 meters, the production capacity generally decreases. If the air volume is increased, the service life of the filter element will be greatly shortened while the filter area of ​​the filter element remains unchanged, increasing the operating cost of the equipment. Summary of the invention

[0004] (1) Technical issues to be resolved

[0005] In order to overcome the problem that the material flows at a high speed when entering the vacuum hopper, the present invention will continuously impact the interior of the vacuum hopper, causing serious wear of the vacuum hopper, shortening the service life of the vacuum hopper, and easily generating noise. The material entering the vacuum hopper at a high speed is prone to turbulence inside the vacuum hopper, causing material splashing and scattering. Since the material enters the hopper at too fast a speed, it is easy to form accumulation or blockage at the discharge port, affecting its subsequent fluidity and reducing production efficiency. The conveying distance of most vacuum feeders is within 10 meters, and the production capacity can meet up to 5000kg / h at most. If the conveying distance exceeds 10 meters, the production capacity generally decreases. If the air volume is increased, the service life of the filter element will be greatly shortened while the filter area of ​​the filter element remains unchanged, increasing the disadvantage of the operating cost of the equipment. The technical problem to be solved by the present invention is to provide a long-distance vacuum feeder and a method of use.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a long-distance vacuum feeder, comprising a vacuum hopper, the inner side of the vacuum hopper is fixedly connected to a support plate, the inner side of the support plate is fixedly connected to a plurality of pleated filter elements, a buffer mechanism is arranged below the pleated filter element, a back-blowing mechanism is arranged on the outer side of the vacuum hopper, two pipes are fixedly connected to the two sides of the vacuum hopper, a self-closing valve is fixedly connected to the middle of the pipe, a Roots blower is fixedly connected to the other end of one of the pipes, a pressure relief valve is arranged on one side of the back-blowing mechanism and the Roots blower, and the vacuum hopper is provided with a vacuum pump. A hopper bracket is fixedly connected to the outer side of the lower end of the hopper, and a vibration mechanism is also arranged on the outer side of the lower end of the vacuum hopper. The lower end of the vacuum hopper is fixedly connected to the relevant fan by fixing bolts. The buffer mechanism includes a crankshaft, which is rotatably connected to the vacuum hopper, and a buffer wheel is fixedly connected to the outer side of the crankshaft. Crank arms are rotatably connected to the two ends of the crankshaft, and the lower ends of the two crank arms are rotatably connected to a linkage shaft, and a linkage seat is rotatably connected to the outer side of the linkage shaft. A T-shaped slide groove is provided on the lower surface of the linkage seat, and limiting plates are fixedly connected to the outer side of the linkage shaft and located on both sides of the linkage seat.

[0008] Preferably, the buffer mechanism also includes a torsion shaft, a circular annular groove is provided at the upper end of the torsion shaft, the torsion shaft is slidably connected to the T-shaped groove on the lower surface of the linkage seat, three stirring impellers are fixedly connected to the outer side of the torsion shaft, a circular hole is provided at the lower end of the torsion shaft, a stirring shaft is slidably connected in the circular hole, a return spring is arranged between the stirring shaft and the torsion shaft, three spiral grooves are provided at the upper end of the stirring shaft, two balls are slidably connected in each spiral groove, six hemispherical grooves are provided on the inner side wall of the circular hole at the lower end of the torsion shaft, and the balls are rotatably connected in the hemispherical grooves.

[0009] Preferably, the Roots blower includes an air inlet, which is fixedly connected to the pipeline, the cross-section of the air inlet is T-shaped, an air inlet filter is arranged on the inner side of the air inlet, one end of the air inlet is fixedly connected to an air inlet muffler, the other end of the air inlet is fixedly connected to a box, the lower surface of the box is fixedly connected to an exhaust port, the outer side of the upper end of the exhaust port is fixedly connected to the exhaust muffler, the upper end of the exhaust port is fixedly connected to a rainproof canopy, the lower surface of the box is also fixedly connected to two heightening blocks, and the lower surface of the heightening blocks is fixedly connected to a base plate.

[0010] Preferably, the Roots blower also includes a driving motor, which is fixedly connected to the upper surface of the base plate, and the output end of the driving motor is fixedly connected to a driving pulley, a driven shaft is rotatably connected to one side of the housing, and the end of the driven shaft passing through the housing is fixedly connected to the driven pulley, three power belts are sleeved on the outer sides of the driving pulley and the driven pulley, one end of the housing is fixedly connected to an oil tank, and the end of the driven shaft passing through the housing and extending into the oil tank is fixedly connected to a driven gear, the other side of the housing is rotatably connected to an extrusion shaft, and the end of the extrusion shaft passing through the housing and extending into the oil tank is fixedly connected to an extrusion gear, the driven gear is meshingly connected to the extrusion gear, and the driven shaft is fixedly connected to an extrusion impeller on the outer side of the extrusion shaft and located inside the housing, and the two extrusion impellers are meshingly connected.

[0011] Preferably, the back-blowing mechanism includes two gas cylinder brackets, the other ends of the two gas cylinder brackets are fixedly connected to compressed gas cylinders, one ends of the two gas cylinder brackets are fixedly connected to the outer side of the vacuum hopper, four injection pipes are fixedly connected to the upper surface of the compressed gas cylinder, the other ends of the injection pipes extend into the interior of the vacuum hopper and are fixedly connected to the vacuum hopper, a plurality of injection holes are provided on the lower surface of the injection pipes extending into the vacuum hopper, a solenoid valve is fixedly connected to the middle part of the injection pipe, and an air inlet joint is fixedly connected to the lower surface of the compressed gas cylinder.

[0012] Preferably, the air shut-off fan includes a body, which is fixedly connected to the vacuum hopper by fixing bolts, the inner side of the body is rotatably connected to a toggle shaft, the outer side of the toggle shaft and the inside of the body is fixedly connected to a unloading wheel, the side of the body is fixedly connected to a reduction box, the reduction box is rotatably connected to the toggle shaft, the outer side of the toggle shaft and the inside of the reduction box is fixedly connected to a toggle gear, the side of the reduction box is fixedly connected to a toggle motor, the output end of the toggle motor is fixedly connected to a reduction gear, and the reduction gear is meshingly connected to the toggle gear.

[0013] Preferably, the pressure relief valve includes a connecting pipe, the connecting pipe is fixedly connected to the box body and the compressed gas cylinder, the other end of the connecting pipe is fixedly connected to the outer shell, the upper end of the outer shell is fixedly connected to the pressure gauge, the inner side of the outer shell is slidably connected to a pressure ball, the side of the pressure ball is fixedly connected to a sliding rod, the outer side of the sliding rod is slidably connected to an adjusting column, the adjusting column is connected to the outer shell by threads, an adjusting spring is provided between the adjusting column and the pressure ball, and the lower surface of the outer shell is fixedly connected to a pressure relief port.

[0014] Preferably, the vibration mechanism includes a vibration seat, the vibration seat is fixedly connected to the outer side of the vacuum hopper, the other side of the vibration seat is fixedly connected to a sealed cabin, the middle of the sealed cabin is rotatably connected to a vibration shaft, the outside of the vibration shaft and inside the sealed cabin is fixedly connected to a vibration wheel, the outside of the vibration wheel is provided with a plurality of tooth grooves, the side of the vibration wheel is provided with four circular through holes, and the other side of the sealed cabin is fixedly connected to an air blowing joint and an air outlet joint.

[0015] Preferably, the self-closing valve includes a valve body, which is fixedly connected to the pipes on both sides, a sealing ball is rotatably connected to the inner side of the valve body, a circular through hole is provided on the side of the sealing ball, both ends of the sealing ball are fixedly connected to a closing shaft, the closing shaft is rotatably connected to the valve body, a switch handle is fixedly connected to the outer side of the closing shaft on the upper side, a closing motor is fixedly connected to the lower end of the closing shaft on the lower side, a closing bracket is fixedly connected to the outer side of the closing motor, and the closing bracket is fixedly connected to the valve body.

[0016] Preferably, a method for using a long-distance vacuum feeder is characterized by comprising the following steps:

[0017] S1. Start the Roots blower. When the Roots blower extracts the air in the vacuum hopper through the pipeline, the output end of the drive motor drives the two extrusion impellers to rotate in opposite directions, extracts the air from the air inlet and pushes it to the exhaust port. The pleated filter element filters the air extracted from the vacuum hopper to prevent materials from entering the pipeline and damaging the Roots blower. A negative pressure space is formed in the vacuum hopper, and the vacuum hopper sucks the materials into the vacuum hopper through the pipeline.

[0018] S2, the material enters the vacuum hopper and drives the buffer mechanism to reduce the material flow rate, and stirs the material simultaneously. The material enters the vacuum hopper and impacts the buffer wheel. The buffer wheel rotates to slow down the material flow rate. The buffer wheel rotates and drives the torsion shaft to move upward while following the rotation direction of the spiral chute of the stirring shaft and rotating with the stirring shaft as the center. The torsion shaft rotates with the stirring shaft as the center and drives the stirring impeller to rotate. The stirring impeller rotates to stir the material in the vacuum hopper to prevent the material from compacting and blocking the discharge port of the vacuum hopper.

[0019] S3. After the vacuum feeder finishes sucking the material, the fan is started to discharge the material in the vacuum hopper. The output end of the toggle motor drives the discharge wheel to rotate. The rotation of the discharge wheel toggles the material in the vacuum hopper outward. The fan can discharge the material quantitatively and continuously, making the output of the material more uniform and avoiding the accumulation of materials blocking the discharge port of the vacuum hopper.

[0020] S4, the vibration mechanism drives the vacuum hopper to vibrate, and the compressed air drives the vibration wheel to rotate with the vibration axis as the center. Due to the influence of the center of gravity of the vibration wheel, the vibration wheel drives the vacuum hopper to vibrate during the rotation process, preventing the material from adhering to the inner wall of the vacuum hopper and affecting the material output speed;

[0021] S5. When the self-closing valve is started to close the two pipes, the output end of the closing motor drives the sealing ball to rotate, and the sealing ball rotates to close the pipes on both sides. When the self-closing valve is manually closed, the switch handle rotates to drive the sealing ball to rotate, and the sealing ball rotates to close the pipes on both sides to prevent the material from being blown out of the pipe and affecting the working environment when the back-blowing mechanism cleans the pleated filter element;

[0022] S6. When the pleated filter element needs to be cleaned, the back-blowing mechanism is started to clean the pleated filter element, the solenoid valve connects the closed jet pipe, and the compressed air in the compressed gas cylinder enters the jet pipe and is ejected from the jet hole to blow off the material particles attached to the outside of the pleated filter element, thereby preventing the pleated filter element from being blocked and affecting the material conveying efficiency of the vacuum loader.

[0023] (3) Beneficial effects

[0024] 1. By setting a buffer mechanism, the material enters the vacuum hopper and impacts the buffer wheel. The buffer wheel rotates to slow down the material flow rate. The rotation of the buffer wheel drives the torsion shaft to move upward and follows the rotation direction of the spiral chute of the stirring shaft to rotate with the stirring shaft as the center. The torsion shaft rotates with the stirring shaft as the center to drive the stirring impeller to rotate. The stirring impeller rotates to stir the material in the vacuum hopper to prevent the material from compacting and blocking the vacuum hopper discharge port. At the same time, the noise generated by the flow of materials is eliminated, the equipment loss is reduced, and the service life of the equipment is extended;

[0025] 2. By setting up a Roots blower, the output end of the driving motor drives the two extrusion impellers to rotate in the opposite direction, extracting air from the air inlet and pushing it to the exhaust port. The Roots blower has a more stable gas compression and conveying efficiency, can maintain a stable material flow rate under different pressures, and increases the material conveying distance; by setting up a backflush mechanism, the solenoid valve controls the connection and closure of the jet pipe, and the compressed air is used to blow off the material particles attached to the outside of the pleated filter element to prevent the pleated filter element from being blocked and affecting the material conveying efficiency of the vacuum feeder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a cross-sectional view of a vacuum hopper of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the buffer mechanism of the present invention;

[0029] Figure 4 It is a cross-sectional view of the torsion shaft and linkage seat of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the Roots blower of the present invention;

[0031] Figure 6 It is a cross-sectional view of the box body of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the fan shutoff fan of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the pressure relief valve of the present invention;

[0034] Fig. 9 It is a schematic diagram of the structure of the vibration mechanism of the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the self-closing valve of the present invention.

[0036] The marks in the attached drawings are: 1-vacuum hopper, 2-blower, 201-machine body, 202-discharging wheel, 203-sliding shaft, 204-sliding gear, 205-reduction gear, 206-sliding motor, 207-reduction box, 3-Roots blower, 301-protective cover, 302-bottom plate, 303-drive motor, 304-drive pulley, 305-power belt, 306-driven pulley, 307-increasing block, 308-intake silencer , 309-exhaust silencer, 310-exhaust port, 311-rainproof canopy, 312-intake filter, 313-intake port, 314-driven shaft, 315-extrusion shaft, 316-extrusion impeller, 317-extrusion gear, 318-driven gear, 319-oil tank, 320-box, 4-pipeline, 5-pressure relief valve, 501-connecting pipe, 502-housing, 503-pressure gauge, 504-pressure ball, 505-pressure relief port, 506- Adjusting spring, 507-sliding rod, 508-adjusting column, 6-self-closing valve, 601-valve body, 602-sealing ball, 603-closing shaft, 604-switch handle, 605-closing bracket, 606-closing motor, 7-vibration mechanism, 701-vibration seat, 702-sealed cabin, 703-vibration shaft, 704-vibration wheel, 705-blowing joint, 706-air outlet joint, 8-backblowing mechanism, 801-compressed gas cylinder, 802-jet Tube, 803-solenoid valve, 804-inlet connector, 805-gas cylinder bracket, 9-buffer mechanism, 901-crankshaft, 902-buffer wheel, 903-crank arm, 904-linkage shaft, 905-linkage seat, 906-limiting plate, 907-torsion shaft, 908-stirring impeller, 909-stirring shaft, 910-stirring bracket, 911-reset spring, 912-ball, 10-pleated filter element, 1001-support plate, 11-hopper bracket. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0038] A long distance vacuum feeder, such as Figure 1 , Figure 2As shown, it includes a vacuum hopper 1, the inner diameter of the vacuum hopper 1 is 930 mm, the inner side of the vacuum hopper 1 is fixedly connected to a support plate 1001, the inner side of the support plate 1001 is fixedly connected to 16 pleated filter elements 10, the model of the pleated filter element 10 is φ120×600, by setting the pleated filter element 10, the air extracted from the vacuum hopper 1 is filtered to prevent the material from entering the pipeline 4 to damage the Roots blower 3, and a buffer mechanism 9 is set below the pleated filter element 10. By setting the buffer mechanism 9, the flow rate of the material is reduced to reduce the impact on the equipment Loss, the material is stirred synchronously to prevent the material from compacting and clogging the discharge port of the vacuum hopper 1. A backflush mechanism 8 is arranged on the outside of the vacuum hopper 1. By arranging the backflush mechanism 8, the pleated filter element 10 is prevented from being blocked and affecting the material conveying efficiency of the vacuum feeder. Two pipes 4 are fixedly connected on both sides of the vacuum hopper 1. The pipe 4 located on the upper part of the vacuum hopper 1 is an exhaust pipe, and the pipe 4 located in the middle of the vacuum hopper 1 is a suction pipe. The diameter of the pipe 4 is 108 mm. The middle of the two pipes 4 are fixedly connected with a self-closing valve 6. By arranging the self-closing valve 6, the vacuum feeder 1 is prevented from being blocked and affecting the material conveying efficiency of the vacuum feeder. When the back-blowing mechanism 8 cleans the pleated filter element 10, the material is blown out of the pipe 4 and affects the working environment. The other end of one of the pipes 4 is fixedly connected to a Roots blower 3. The model of the Roots blower 3 is SSR-150V-37KW. By setting the Roots blower 3, a stable material flow rate can be maintained under different pressures, thereby increasing the material conveying distance. A pressure relief valve 5 is provided on one side of the back-blowing mechanism 8 and the Roots blower 3. By setting the pressure relief valve 5, the internal pressure of the back-blowing mechanism 8 and the Roots blower 3 is controlled to prevent the back-blowing mechanism 8 and the Roots blower 3 from Machine 3 is damaged due to excessive internal pressure. A hopper bracket 11 is fixedly connected to the outer side of the lower end of the vacuum hopper 1. By setting the hopper bracket 11, support is provided for the vacuum hopper 1 to ensure the smooth operation of the vacuum feeder. A vibration mechanism 7 is also provided on the outer side of the lower end of the vacuum hopper 1. By setting the vibration mechanism 7, the material is prevented from adhering to the inner wall of the vacuum hopper 1 and affecting the output speed of the material. The lower end of the vacuum hopper 1 is fixedly connected to the relevant fan 2 by fixing bolts. By setting the fan 2 off, the material can be discharged quantitatively and continuously, so that the output of the material is more uniform.

[0039] like Figure 3 , Figure 4As shown, the buffer mechanism 9 includes a crankshaft 901, which is rotatably connected to the vacuum hopper 1, a buffer wheel 902 is fixedly connected to the outer side of the crankshaft 901, crank arms 903 are rotatably connected to both ends of the crankshaft 901, the lower ends of the two crank arms 903 are rotatably connected to a linkage shaft 904, the outer side of the linkage shaft 904 is rotatably connected to a linkage seat 905, and the outer side of the linkage shaft 904 and the two sides of the linkage seat 905 are fixedly connected to a limiting plate 906, the lower surface of the linkage seat 905 is provided with a T-shaped groove, and a torsion shaft 907 is slidably connected in the T-shaped groove, and the upper end of the torsion shaft 907 is opened. A circular annular groove is provided which matches the T-shaped groove on the lower surface of the linkage seat 905. Three stirring impellers 908 are fixedly connected to the outer side of the torsion shaft 907. A circular hole is provided at the lower end of the torsion shaft 907. A stirring shaft 909 is slidably connected in the circular hole. A return spring 911 is provided between the stirring shaft 909 and the torsion shaft 907. Three spiral grooves are provided at the upper end of the stirring shaft 909. Two balls 912 are slidably connected in each spiral groove. Six hemispherical grooves are provided on the inner side wall of the circular hole at the lower end of the torsion shaft 907. The balls 912 are rotatably connected in the hemispherical grooves.

[0040] like Figure 5 , Figure 6 As shown, the Roots blower 3 includes an air inlet 313, which is fixedly connected to the pipeline 4, and the air inlet 313 is T-shaped. An air inlet filter 312 is arranged on the inner side of the air inlet 313, and an air inlet muffler 308 is fixedly connected to the upper end of the T-shaped air inlet 313. The other end of the T-shaped air inlet 313 is fixedly connected to a box body 320, and an exhaust port 310 is fixedly connected to the lower surface of the box body 320. An exhaust muffler 309 is fixedly connected to the outer side of the upper end of the exhaust port 310, and a rainproof canopy 311 is fixedly connected to the upper end of the exhaust port 310. Two heightening blocks 307 are also fixedly connected to the lower surface of the box body 320, and a bottom plate 302 is fixedly connected to the lower surface of the heightening block 307, and a driving motor 303 is also fixedly connected to the upper surface of the bottom plate 302, and a driving pulley 304 is fixedly connected to the output end of the driving motor 303. A driven shaft 314 is rotatably connected to one side of the housing 320, and a driven pulley 306 is fixedly connected to the end of the driven shaft 314 that passes through the housing 320. Three power belts 305 are sleeved on the outer sides of the driving pulley 304 and the driven pulley 306. An oil tank 319 is fixedly connected to one end of the housing 320, and a driven gear 318 is fixedly connected to the end of the driven shaft 314 that passes through the housing 320 and extends into the oil tank 319. An extrusion shaft 315 is rotatably connected to the other side of the housing 320, and an extrusion gear 317 is fixedly connected to the end of the extrusion shaft 315 that passes through the housing 320 and extends into the oil tank 319. The driven gear 318 is meshingly connected to the extrusion gear 317. An extrusion impeller 316 is fixedly connected to the outer sides of the driven shaft 314 and the extrusion shaft 315 and located inside the housing 320, and the two extrusion impellers 316 are meshingly connected.

[0041] like Figure 2 As shown, the back-blowing mechanism 8 includes two gas cylinder brackets 805, one end of the two gas cylinder brackets 805 is fixedly connected to the outer side of the vacuum hopper 1, the other end of the two gas cylinder brackets 805 is fixedly connected to the compressed gas cylinder 801, the upper surface of the compressed gas cylinder 801 is fixedly connected to four injection pipes 802, the other end of the injection pipe 802 extends to the inside of the vacuum hopper 1 and is fixedly connected to the vacuum hopper 1, a plurality of injection holes are provided on the lower surface of the injection pipe 802 extending into the vacuum hopper 1, a solenoid valve 803 is fixedly connected to the middle part of the injection pipe 802, and an air inlet connector 804 is fixedly connected to the lower surface of the compressed gas cylinder 801.

[0042] like Figure 7 As shown, the air shut-off fan 2 includes a body 201, which is fixedly connected to the vacuum hopper 1 by fixing bolts, and the inner side of the body 201 is rotatably connected to a toggle shaft 203, and the outer side of the toggle shaft 203 and the inner side of the body 201 are fixedly connected to a discharge wheel 202, and the capacity of each grid of the discharge wheel 202 is 20L. The side of the body 201 is fixedly connected to a reduction box 207, and the reduction box 207 is rotatably connected to the toggle shaft 203, and the outer side of the toggle shaft 203 and the inner side of the reduction box 207 are fixedly connected to a toggle gear 204, and the side of the reduction box 207 is fixedly connected to a toggle motor 206, and the output end of the toggle motor 206 is fixedly connected to a reduction gear 205, and the reduction gear 205 is meshingly connected to the toggle gear 204.

[0043] like Figure 8 As shown, the pressure relief valve 5 includes a connecting pipe 501, and the box body 320 and the compressed gas cylinder 801 are both provided with the pressure relief valve 5, the connecting pipe 501 is fixedly connected to the box body 320 and the compressed gas cylinder 801, the other end of the connecting pipe 501 is fixedly connected to the outer shell 502, the upper end of the outer shell 502 is fixedly connected to the pressure gauge 503, the inner side of the outer shell 502 is slidably connected to a pressure ball 504, the side of the pressure ball 504 is fixedly connected to a sliding rod 507, the outer side of the sliding rod 507 is slidably connected to an adjusting column 508, the adjusting column 508 is threadedly connected to the outer shell 502, an adjusting spring 506 is provided between the adjusting column 508 and the pressure ball 504, and the lower surface of the outer shell 502 is fixedly connected to a pressure relief port 505.

[0044] like Fig. 9As shown, the vibration mechanism 7 includes a vibration seat 701, which is fixedly connected to the outer side of the vacuum hopper 1, and a sealed cabin 702 is fixedly connected to the other side of the vibration seat 701. The middle part of the sealed cabin 702 is rotatably connected to a vibration shaft 703, and a vibration wheel 704 is fixedly connected to the outer side of the vibration shaft 703 and located inside the sealed cabin 702. The outer side of the vibration wheel 704 is provided with a plurality of tooth grooves, and the side of the vibration wheel 704 is provided with four circular through holes. The four circular through holes provided on the vibration wheel 704 are arranged on one side of the vibration wheel 704. When the vibration wheel 704 rotates, an eccentric effect is generated, thereby vibrating the vacuum hopper 1. The other side of the sealed cabin 702 is fixedly connected to an air blowing joint 705 and an air outlet joint 706. The air blowing joint 705 can be externally connected to an air pump, and the air flow can blow the vibration wheel 704 to rotate.

[0045] like Fig.10 As shown, the self-closing valve 6 includes a valve body 601, which is fixedly connected to the pipes 4 on both sides, a sealing ball 602 is rotatably connected to the inner side of the valve body 601, a circular through hole is opened on the side of the sealing ball 602, both ends of the sealing ball 602 are fixedly connected to a closing shaft 603, the closing shaft 603 is rotatably connected to the valve body 601, the top end of the upper closing shaft 603 is fixedly connected to a switch handle 604, the bottom end of the lower closing shaft 603 is fixedly connected to a closing motor 606, the outer side of the closing motor 606 is fixedly connected to a closing bracket 605, and the closing bracket 605 is fixedly connected to the valve body 601.

[0046] Working principle: When the vacuum feeder is working, the Roots blower 3 is started first, and the Roots blower 3 extracts the air in the vacuum hopper 1 through the pipeline 4. The Roots blower 3 compresses and conveys the gas more stably, and can maintain a stable material flow rate under different pressures. The pleated filter element 10 filters the air extracted from the vacuum hopper 1 to prevent the material from entering the pipeline 4 and damaging the Roots blower 3. A negative pressure space is formed in the vacuum hopper 1, and the vacuum hopper 1 sucks the material into the vacuum hopper 1 through the pipeline 4. The material enters the vacuum hopper 1 and drives the buffer mechanism 9 to reduce the material flow rate, thereby reducing the loss to the equipment. The material is stirred simultaneously to prevent the material from being compacted. Block the discharge port of the vacuum hopper 1. After the vacuum feeder finishes sucking the material, start the fan 2 to discharge the material in the vacuum hopper 1. The vibration mechanism 7 drives the vacuum hopper 1 to vibrate to prevent the material from adhering to the inner wall of the vacuum hopper 1 and affecting the material output speed. After the vacuum feeder has worked for a certain period of time, first start the self-closing valve 6 to close the two pipes 4, and then start the back-blowing mechanism 8 to clean the pleated filter element 10. Set the internal pressure of the back-blowing mechanism 8 and the Roots blower 3 through the pressure relief valve 5. When the internal pressure of the back-blowing mechanism 8 and the Roots blower 3 exceeds the set standard, the pressure is automatically relieved to prevent the back-blowing mechanism 8 and the Roots blower 3 from being damaged due to excessive internal pressure.

[0047] When the Roots blower 3 is started and the air in the vacuum hopper 1 is extracted through the pipeline 4, the driving motor 303 is started, and the output end of the driving motor 303 drives the driving pulley 304 to rotate. Under the action of the power belt 305, the driving pulley 304 rotates and drives the driven pulley 306 to rotate. The driven pulley 306 rotates and drives the driven shaft 314 to rotate. The driven shaft 314 rotates and drives one of the extrusion impellers 316 to rotate. The driven shaft 314 rotates and drives the driven gear 318 to rotate. The driven gear 318 is meshed and connected with the extrusion gear 317. The driven gear 318 rotates and drives the extrusion gear 317 to rotate in the opposite direction. The extrusion gear 317 rotates in the opposite direction and drives the extrusion shaft 315 to rotate in the opposite direction. The reverse rotation of 315 drives another extrusion impeller 316 to rotate in the reverse direction. The two extrusion impellers 316 rotate in the reverse direction to extract air from the air inlet 313 and push it to the exhaust port 310. The air in the vacuum hopper 1 flows into the air inlet 313 through the pipeline 4. The air inlet filter 312 filters the air in the pipeline 4. The air inlet muffler 308 absorbs the noise generated by the air flow at the air inlet 313. The exhaust muffler 309 absorbs the noise generated by the air flow at the exhaust port 310. The rainproof canopy 311 prevents rainwater from entering the exhaust port 310 and corroding the inner wall of the exhaust port 310. The Roots blower 3 compresses and conveys gas with more stable efficiency, can maintain a stable material flow rate under different pressures, and increases the material conveying distance.

[0048] The material enters the vacuum hopper 1 through the long-distance pipeline 4, driving the buffer mechanism 9 to reduce the material flow rate. When the material is stirred synchronously, the material enters the vacuum hopper 1 and impacts the buffer wheel 902. The buffer wheel 902 rotates to slow down the material flow rate. The rotation of the buffer wheel 902 drives the crankshaft 901 to rotate. The rotation of the crankshaft 901 drives the two crank arms 903 to reciprocate up and down. The up and down reciprocating motion of the crank arm 903 drives the linkage shaft 904 to reciprocate up and down. The up and down reciprocating motion of the linkage shaft 904 drives the linkage seat 905 to reciprocate up and down. The up and down reciprocating motion of the linkage seat 905 drives the torsion shaft 907 to reciprocate up and down. 07 moves upward so that the ball 912 slides in the spiral groove outside the stirring shaft 909. Under the action of the ball 912, the torsion shaft 907 moves upward and follows the rotation direction of the spiral groove of the stirring shaft 909 while rotating around the stirring shaft 909 as the center. When the torsion shaft 907 moves downward, the reset spring 911 is compressed. The reset spring 911 contracts and stretches to push the torsion shaft 907 to reciprocate up and down. The torsion shaft 907 rotates around the stirring shaft 909 as the center, driving the stirring impeller 908 to rotate. The stirring impeller 908 rotates to stir the material in the vacuum hopper 1 to prevent the material from compacting and blocking the discharge port of the vacuum hopper 1.

[0049] When the fan 2 is started to discharge the material in the vacuum hopper 1, the toggle motor 206 is started, and the output end of the toggle motor 206 drives the reduction gear 205 to rotate, and the reduction gear 205 is meshed and connected with the toggle gear 204. The rotation of the reduction gear 205 drives the toggle gear 204 to rotate, and the rotation of the toggle gear 204 drives the unloading wheel 202 to rotate. The unloading wheel 202 rotates to push the material in the vacuum hopper 1 outward, and the fan 2 can discharge quantitatively and continuously, so that the output of the material is more uniform, and avoid the accumulation of materials blocking the discharge port of the vacuum hopper 1.

[0050] When the vibration mechanism 7 drives the vacuum hopper 1 to vibrate, compressed air enters the sealed cabin 702 from the blowing joint 705. Under the action of the outer tooth grooves of the vibration wheel 704, the compressed air pushes the vibration wheel 704 to rotate around the vibration axis 703 as the center of the circle, and the compressed air is discharged through the air outlet joint 706. Due to the influence of the center of gravity position of the vibration wheel 704, the vibration wheel 704 drives the vacuum hopper 1 to vibrate during the rotation process, thereby preventing the material from adhering to the inner wall of the vacuum hopper 1 and affecting the material output speed.

[0051] When the self-closing valve 6 is started to close the two pipes 4, the closing motor 606 is started, and the output end of the closing motor 606 drives the closing shaft 603 to rotate, and the closing shaft 603 rotates to drive the sealing ball 602 to rotate, and the sealing ball 602 rotates to close the pipes 4 on both sides. When the self-closing valve 6 is manually closed, the switch handle 604 is turned, and the switch handle 604 rotates to drive the closing shaft 603 to rotate, and the closing shaft 603 rotates to drive the sealing ball 602 to rotate, and the sealing ball 602 rotates to close the pipes 4 on both sides to prevent the material from being blown out of the pipe 4 and affecting the working environment when the back-blowing mechanism 8 cleans the pleated filter element 10.

[0052] When the back-blowing mechanism 8 is started to clean the pleated filter element 10, the solenoid valve 803 is opened, and the solenoid valve 803 connects the closed jet pipe 802. The compressed air in the compressed gas cylinder 801 enters the jet pipe 802 and is ejected from the jet hole to blow off the material particles attached to the outside of the pleated filter element 10, so as to prevent the pleated filter element 10 from being blocked and affecting the material conveying efficiency of the vacuum feeder. After the blowing is completed, the solenoid valve 803 closes the jet pipe 802, and the compressed air enters the compressed gas cylinder 801 through the air inlet joint 804 for accumulation.

[0053] When the internal pressure of the back-blowing mechanism 8 and the Roots blower 3 is set by the pressure relief valve 5, the adjusting column 508 is rotated, and the adjusting column 508 rotates to compress the adjusting spring 506. The adjusting spring 506 pushes the pressure ball 504 to slide to one side, and the pressure ball 504 slides to one side and drives the sliding rod 507 to slide to one side. The pressure gauge 503 displays the real-time pressure in the compressed gas cylinder 801 and the box body 320. When the pressure in the compressed gas cylinder 801 and the box body 320 exceeds the pressure of the spring, the air pushes the pressure ball 504 to slide to the other side, and the pressure ball 504 slides to the other side and drives the sliding rod 507 to slide to the other side. The pressure ball 504 slides to the other side to discharge the compressed air from the pressure relief port 505. The pressure of the adjusting spring 506 is adjusted by rotating the adjusting column 508, and then the internal pressure of the compressed gas cylinder 801 and the box body 320 is controlled to prevent the back-blowing mechanism 8 and the Roots blower 3 from being damaged due to excessive internal pressure.

[0054] A method for using a long-distance vacuum feeder, characterized in that it comprises the following steps:

[0055] S1, start the Roots blower 3, which extracts the air in the vacuum hopper 1 through the pipeline 4. The output end of the driving motor 303 drives the two extrusion impellers 316 to rotate in the opposite direction, extracts the air from the air inlet 313 and pushes it to the exhaust port 310. The pleated filter element 10 filters the air extracted from the vacuum hopper 1 to prevent the material from entering the pipeline 4 and damaging the Roots blower 3. A negative pressure space is formed in the vacuum hopper 1, and the vacuum hopper 1 sucks the material into the vacuum hopper 1 through the pipeline 4.

[0056] S2, the material enters the vacuum hopper 1 and drives the buffer mechanism 9 to reduce the material flow rate, and stirs the material at the same time. The material enters the vacuum hopper 1 and impacts the buffer wheel 902. The buffer wheel 902 rotates to slow down the material flow rate. The buffer wheel 902 rotates and drives the torsion shaft 907 to move upward. At the same time, it follows the rotation direction of the spiral chute of the stirring shaft 909 and rotates with the stirring shaft 909 as the center. The torsion shaft 907 rotates with the stirring shaft 909 as the center and drives the stirring impeller 908 to rotate. The stirring impeller 908 rotates to stir the material in the vacuum hopper 1 to prevent the material from compacting and blocking the discharge port of the vacuum hopper 1.

[0057] S3, after the vacuum feeder finishes sucking the material, the fan 2 is started to discharge the material in the vacuum hopper 1, and the output end of the motor 206 is driven to drive the discharge wheel 202 to rotate, and the discharge wheel 202 rotates to push the material in the vacuum hopper 1 outward, and the fan 2 can discharge the material quantitatively and continuously, so that the output of the material is more uniform, and the material accumulation is prevented from blocking the discharge port of the vacuum hopper 1;

[0058] S4, the vibration mechanism 7 drives the vacuum hopper 1 to vibrate, and the compressed air drives the vibration wheel 704 to rotate with the vibration shaft 703 as the center. Due to the influence of the center of gravity of the vibration wheel 704, the vibration wheel 704 drives the vacuum hopper 1 to vibrate during the rotation process, preventing the material from adhering to the inner wall of the vacuum hopper 1 and affecting the material output speed;

[0059] S5. When the self-closing valve 6 is started to close the two pipes 4, the output end of the closing motor 606 drives the sealing ball 602 to rotate, and the sealing ball 602 rotates to close the pipes 4 on both sides. When the self-closing valve 6 is manually closed, the switch handle 604 rotates to drive the sealing ball 602 to rotate, and the sealing ball 602 rotates to close the pipes 4 on both sides to prevent the material from being blown out of the pipe 4 and affecting the working environment when the back-blowing mechanism 8 cleans the pleated filter element 10;

[0060] S6. When the pleated filter element 10 needs to be cleaned, the back-blowing mechanism 8 is started to clean the pleated filter element 10, and the solenoid valve 803 connects the closed jet pipe 802. The compressed air in the compressed gas cylinder 801 enters the jet pipe 802 and is ejected from the jet hole to blow off the material particles attached to the outside of the pleated filter element 10, so as to prevent the pleated filter element 10 from being blocked and affecting the material conveying efficiency of the vacuum feeder.

[0061] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A long distance vacuum feeder, characterized in that: The invention comprises a vacuum hopper (1), wherein the inner side surface of the vacuum hopper (1) is fixedly connected to a support plate (1001), the inner side of the support plate (1001) is fixedly connected to a plurality of pleated filter elements (10), a buffer mechanism (9) is arranged below the pleated filter element (10), a back-blowing mechanism (8) is arranged outside the vacuum hopper (1), two pipes (4) are fixedly connected to the two sides of the vacuum hopper (1), a self-closing valve (6) is fixedly connected to the middle of the pipe (4), the other end of one of the pipes (4) is fixedly connected to a Roots blower (3), a pressure relief valve (5) is arranged on one side of the back-blowing mechanism (8) and the Roots blower (3), a hopper bracket (11) is fixedly connected to the outer side of the lower end of the vacuum hopper (1), and the vacuum hopper (1) A vibration mechanism (7) is also provided on the outer side of the lower end. The lower end of the vacuum hopper (1) is fixedly connected to the relevant fan (2) by means of fixing bolts. The buffer mechanism (9) comprises a crankshaft (901). The crankshaft (901) is rotatably connected to the vacuum hopper (1). A buffer wheel (902) is fixedly connected to the outer side of the crankshaft (901). Crank arms (903) are rotatably connected to both ends of the crankshaft (901). The lower ends of the two crank arms (903) are rotatably connected to linkage shafts (904). The outer side of the linkage shaft (904) is rotatably connected to a linkage seat (905). A T-shaped slide groove is provided on the lower surface of the linkage seat (905). Limiting plates (906) are fixedly connected to the outer side of the linkage shaft (904) and located on both sides of the linkage seat (905).

2. A long distance vacuum feeder according to claim 1, characterized in that: The buffer mechanism (9) further comprises a torsion shaft (907), the upper end of which is provided with a circular annular groove, the torsion shaft (907) being slidably connected to a T-shaped groove on the lower surface of the linkage seat (905), three stirring impellers (908) being fixedly connected to the outer side of the torsion shaft (907), the lower end of which is provided with a circular hole, the stirring shaft (909) being slidably connected to the circular hole, a return spring (911) being arranged between the stirring shaft (909) and the torsion shaft (907), the upper end of which is provided with three spiral grooves, each of which is slidably connected to two balls (912), the inner side wall of the circular hole at the lower end of the torsion shaft (907) being provided with six hemispherical grooves, the balls (912) being rotatably connected to the hemispherical grooves.

3. A long distance vacuum feeder according to claim 2, characterized in that: The Roots blower (3) comprises an air inlet (313), the air inlet (313) being fixedly connected to the pipe (4), the cross section of the air inlet (313) being T-shaped, an air inlet filter (312) being arranged on the inner side of the air inlet (313), one end of the air inlet (313) being fixedly connected to an air inlet silencer (308), the other end of the air inlet (313) being fixedly connected to a box (320), the lower surface of the box (320) being fixedly connected to an exhaust port (310), the outer side of the upper end of the exhaust port (310) being fixedly connected to an exhaust silencer (309), the upper end of the exhaust port (310) being fixedly connected to a rainproof canopy (311), the lower surface of the box (320) being further fixedly connected to two heightening blocks (307), the lower surface of the heightening blocks (307) being fixedly connected to a bottom plate (302).

4. A long distance vacuum feeder according to claim 3, characterized in that: The Roots blower (3) further comprises a drive motor (303), wherein the drive motor (303) is fixedly connected to the upper surface of the base plate (302), and an output end of the drive motor (303) is fixedly connected to a drive pulley (304). A driven shaft (314) is rotatably connected to one side of the housing (320), and an end of the driven shaft (314) that passes through the housing (320) is fixedly connected to a driven pulley (306). Three power belts (305) are sleeved on the outer sides of the drive pulley (304) and the driven pulley (306). An oil tank (319) is fixedly connected to one end of the housing (320). 14) A driven gear (318) is fixedly connected to the end portion that passes through the housing (320) and extends into the oil tank (319); an extrusion shaft (315) is rotatably connected to the other side of the housing (320); an extrusion gear (317) is fixedly connected to the end portion of the extrusion shaft (315) that passes through the housing (320) and extends into the oil tank (319); the driven gear (318) is meshingly connected to the extrusion gear (317); an extrusion impeller (316) is fixedly connected to the driven shaft (314) on the outside of the extrusion shaft (315) and located inside the housing (320); and the two extrusion impellers (316) are meshingly connected.

5. A long distance vacuum feeder according to claim 4, characterized in that: The back-blowing mechanism (8) comprises two gas cylinder supports (805), one end of the two gas cylinder supports (805) is fixedly connected to the outer side surface of the vacuum hopper (1), the other end of the two gas cylinder supports (805) is fixedly connected to a compressed gas cylinder (801), the upper surface of the compressed gas cylinder (801) is fixedly connected to four jet pipes (802), the other end of the jet pipe (802) extends into the interior of the vacuum hopper (1) and is fixedly connected to the vacuum hopper (1), a plurality of jet holes are formed on the lower surface of the jet pipe (802) extending into the vacuum hopper (1), a solenoid valve (803) is fixedly connected to the middle of the jet pipe (802), and an air inlet joint (804) is fixedly connected to the lower surface of the compressed gas cylinder (801).

6. A long distance vacuum feeder according to claim 5, characterized in that: The air shut-off fan (2) comprises a body (201), the body (201) being fixedly connected to the vacuum hopper (1) via fixing bolts, the inner side of the body (201) being rotatably connected to a toggle shaft (203), the outer side of the toggle shaft (203) and located inside the body (201) being fixedly connected to a discharge wheel (202), the side of the body (201) being fixedly connected to a reduction box (207), the reduction box (207) being rotatably connected to the toggle shaft (203), the outer side of the toggle shaft (203) and located inside the reduction box (207) being fixedly connected to a toggle gear (204), the side of the reduction box (207) being fixedly connected to a toggle motor (206), the output end of the toggle motor (206) being fixedly connected to a reduction gear (205), the reduction gear (205) being meshingly connected to the toggle gear (204).

7. A long distance vacuum feeder according to claim 6, characterized in that: The pressure relief valve (5) comprises a connecting pipe (501), wherein the connecting pipe (501) is fixedly connected to the box body (320) and the compressed gas cylinder (801), the other end of the connecting pipe (501) is fixedly connected to a housing (502), the upper end of the housing (502) is fixedly connected to a pressure gauge (503), the inner side of the housing (502) is slidably connected to a pressure ball (504), the side of the pressure ball (504) is fixedly connected to a sliding rod (507), the outer side of the sliding rod (507) is slidably connected to an adjusting column (508), the adjusting column (508) is connected to the housing (502) by threads, an adjusting spring (506) is provided between the adjusting column (508) and the pressure ball (504), and the lower surface of the housing (502) is fixedly connected to a pressure relief port (505).

8. The long-distance vacuum feeder according to claim 7, characterized in that: The vibration mechanism (7) comprises a vibration seat (701), the vibration seat (701) being fixedly connected to the outer side surface of the vacuum hopper (1), the other side of the vibration seat (701) being fixedly connected to a sealed cabin (702), the middle part of the sealed cabin (702) being rotatably connected to a vibration shaft (703), a vibration wheel (704) being fixedly connected to the outer side of the vibration shaft (703) and located inside the sealed cabin (702), the outer side of the vibration wheel (704) being provided with a plurality of tooth grooves, the side surface of the vibration wheel (704) being provided with four circular through holes, and the other side of the sealed cabin (702) being fixedly connected to an air blowing joint (705) and an air outlet joint (706).

9. The long-distance vacuum feeder according to claim 8, characterized in that: The self-closing valve (6) comprises a valve body (601), wherein the valve body (601) is fixedly connected to the pipes (4) on both sides, a sealing ball (602) is rotatably connected to the inner side of the valve body (601), a circular through hole is provided on the side of the sealing ball (602), a closing shaft (603) is fixedly connected to both ends of the sealing ball (602), the closing shaft (603) is rotatably connected to the valve body (601), a switch handle (604) is fixedly connected to the top end of the upper closing shaft (603), a closing motor (606) is fixedly connected to the bottom end of the lower closing shaft (603), a closing bracket (605) is fixedly connected to the outer side of the closing motor (606), and the closing bracket (605) is fixedly connected to the valve body (601).

10. The method for using a long-distance vacuum feeder according to claim 9, characterized in that: The following steps are involved: S1. Starting the Roots blower (3). When the Roots blower (3) extracts the air in the vacuum hopper (1) through the pipe (4), the output end of the drive motor (303) drives the two extrusion impellers (316) to rotate in opposite directions, extracting the air from the air inlet (313) and pushing the air to the exhaust port (310). The pleated filter element (10) filters the air extracted from the vacuum hopper (1) to prevent the material from entering the pipe (4) and damaging the Roots blower (3). A negative pressure space is formed in the vacuum hopper (1). The vacuum hopper (1) sucks the material into the vacuum hopper (1) through the pipe (4). S2, the material enters the vacuum hopper (1) and drives the buffer mechanism (9) to reduce the material flow rate and simultaneously stir the material. The material enters the vacuum hopper (1) and impacts the buffer wheel (902). The buffer wheel (902) rotates to reduce the material flow rate. The buffer wheel (902) rotates and drives the torsion shaft (907) to move upward while following the rotation direction of the spiral chute of the stirring shaft (909) and rotating with the stirring shaft (909) as the center. The torsion shaft (907) rotates with the stirring shaft (909) as the center and drives the stirring impeller (908) to rotate. The stirring impeller (908) rotates to stir the material in the vacuum hopper (1) to prevent the material from compacting and blocking the discharge port of the vacuum hopper (1). S3, after the vacuum feeder has finished sucking the material, the fan (2) is started to discharge the material in the vacuum hopper (1), and the output end of the shifting motor (206) drives the discharge wheel (202) to rotate, and the discharge wheel (202) rotates to shift the material in the vacuum hopper (1) outward, and the fan (2) can discharge the material quantitatively and continuously, so that the output of the material is more uniform, and avoids the accumulation of materials blocking the discharge port of the vacuum hopper (1); S4, the vibration mechanism (7) drives the vacuum hopper (1) to vibrate, and the compressed air drives the vibration wheel (704) to rotate with the vibration axis (703) as the center of the circle. Due to the influence of the center of gravity position of the vibration wheel (704), the vibration wheel (704) drives the vacuum hopper (1) to vibrate during the rotation process, thereby preventing the material from adhering to the inner wall of the vacuum hopper (1) and affecting the material output speed; S5. When the self-closing valve (6) is started to close the two pipes (4), the output end of the closing motor (606) drives the sealing ball (602) to rotate, and the sealing ball (602) rotates to close the pipes (4) on both sides. When the self-closing valve (6) is manually closed, the switch handle (604) rotates to drive the sealing ball (602) to rotate, and the sealing ball (602) rotates to close the pipes (4) on both sides, thereby preventing materials from being blown out of the pipe (4) and affecting the working environment when the back-blowing mechanism (8) cleans the pleated filter element (10); S6. When the pleated filter element (10) needs to be cleaned, the back-blowing mechanism (8) is started to clean the pleated filter element (10), the solenoid valve (803) connects the closed jet pipe (802), and the compressed air in the compressed gas cylinder (801) enters the jet pipe (802) and is ejected from the jet hole to blow off the material particles attached to the outside of the pleated filter element (10), thereby preventing the pleated filter element (10) from being blocked and affecting the material conveying efficiency of the vacuum feeder.

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