WO2021179646A1

WO2021179646A1 - Double piston type pneumatic conveyor

Info

Publication number: WO2021179646A1
Application number: PCT/CN2020/127411
Authority: WO
Inventors: 马官国; 陈连军; 程卫民; 刘国明; 衣龙晓; 张存慧
Original assignee: 山东科技大学
Priority date: 2020-03-12
Filing date: 2020-11-09
Publication date: 2021-09-16
Also published as: CN111348441A; CN111348441B

Abstract

A double piston type pneumatic conveyor, comprising a rack (1), a rotor mechanism (2), an upper cylinder mechanism (4), a lower cylinder mechanism (3), a piston drive mechanism (6), and a hydraulic mechanism (7). The hydraulic mechanism (7) is arranged on the rear side of a bottom frame; the rotor mechanism (2) is fixed on the front side of the bottom frame; the lower cylinder mechanism (3) is configured above the rotor mechanism (2); the upper cylinder mechanism (4) is configured above the lower cylinder mechanism (3); a hopper (5) is mounted above an upper cylinder (409) of the upper cylinder mechanism (4). The upper cylinder mechanism (4) and the lower cylinder mechanism (3) are arranged in the same direction. The piston drive mechanism (6) simultaneously drives two cylinder mechanisms, so that an upper sealing piston (406) and a lower sealing piston (310) are located at a sealing position alternately. The rotor mechanism (2) continuously jets materials in a material bin in the rotating process of a rotor. The pneumatic conveyor reduces the friction between the materials and the sealing pistons, improves the sealing effect and the jetting distance, and reduces dust in the conveying process, which prolongs the service life.

Description

A double-piston pneumatic conveyor

Technical field

The invention relates to the technical field of pneumatic spraying devices, in particular to a double-piston pneumatic conveyor.

Background technique

Pneumatic conveying equipment is often used in the chemical industry, mines, and coal mines to transport powder, fine particles and other materials in the pipeline under the action of compressed air; in recent years, the pressure relief of coal wall boreholes in coal mines has also Begin to use conveyors, but most of the traditional pneumatic conveying equipment has problems such as fast wear, short conveying distance, and large conveying dust. The sealing of the pneumatic conveyor is mainly realized by the pushing piston, but the sealing is not tight after the pushing piston is rubbed against the material for a long time, so the spray distance is reduced, and there is still a large amount of dust when conveying dust-prone materials. In addition, it is necessary to further simplify the structure of the jet.

Technical solutions

In order to solve the contradiction that the rotor or piston of the traditional jet machine needs to push and seal, it can reduce the friction of the sealing piston, improve the sealing effect, reduce the spraying dust, and extend the service life of the equipment. The present invention provides a dual-piston pneumatic Conveyor. The specific technical scheme is as follows.

A dual-piston pneumatic conveyor includes a frame, a rotor mechanism, an upper cylinder mechanism, a lower cylinder mechanism, a piston drive mechanism, and a hydraulic mechanism. The hydraulic mechanism is arranged on the rear side of a chassis, and the rotor mechanism is fixed at the bottom. The front side of the frame; the rotor mechanism is used for spraying concrete, the hydraulic mechanism is used to achieve hydraulic drive; the lower cylinder mechanism is arranged above the rotor mechanism, the upper cylinder mechanism is arranged above the lower cylinder mechanism, and the hopper is installed The upper cylinder tube of the upper cylinder tube mechanism; the hopper and the upper cylinder tube of the upper cylinder tube mechanism are fixedly connected, the upper cylinder tube is connected to the upper box body, and the bottom of the upper box body is connected with the lower cylinder tube. The box bodies are connected, and the lower box body is arranged above the rotor housing of the rotor mechanism; the piston driving structure is provided with a wheel groove, and the mounting positions of the upper pushing roller and the lower pushing roller are opposite to each other in the wheel groove.

Preferably, the rotor mechanism includes a rotor housing, a rotor, a conical distributor, an air inlet, a discharge port, a housing leg, and a drive mechanism. The drive mechanism includes a drive motor, a gear box and a motor seat. The rotor housing is supported by the housing. The legs are fixed above the gearbox, the rotor is in the rotor housing and connected to the output shaft of the gearbox, and the conical distributor is arranged above the rotor; a sealing seat is also provided between the rotor housing and the output shaft of the gearbox , The inside of the sealing seat is provided with a 0-shaped sealing ring, the bottom of the rotor housing is equipped with a discharge port, and the upper part of the rotor housing on the same side as the discharge port is also provided with an air inlet; the input end of the gearbox is fixedly installed On the motor seat, the output shaft of the motor and the input shaft of the gearbox are connected by a spline.

It is also preferable that the rotor has a ring shape, a plurality of partitions are evenly arranged along the radius of the rotor, a plurality of material cavities are formed between the partitions, and an opening is provided on the lower side of the material cavity; an air inlet device is installed at the air inlet, and the air inlet The device extends into the rotor shell, and the air outlet of the air inlet device has the same shape as the trough on the rotor.

It is also preferred that the upper cylinder barrel mechanism includes an upper pushing rod, an upper box body, an upper cylinder barrel, an upper sealing piston, an upper pushing piston, a material stopper, and an exhaust device, and the upper box body and the lower cylinder barrel pass through a mounting flange. Fixed connection, the upper cylinder is connected with the upper box body, and the end of the upper box body is provided with an exhaust device; the front end of the upper pushing rod is coaxially installed with a pusher piston, and the front end of the upper pusher piston is provided with an upper connecting shaft coaxially , The front end of the upper connecting shaft is fixedly provided with an upper sealing piston, and the front end of the upper sealing piston is fixed with an exhaust rod along the axis; a plurality of baffles are also coaxially arranged on the upper connecting shaft, and the upper pushing rod end is also provided There are push rollers.

It is also preferred that the exhaust device includes an exhaust flange, an exhaust pipe, and an exhaust seat, the exhaust flange is fixed at the end of the upper box body, and the exhaust pipe is in communication with the upper box body; the exhaust pipe Passing through the exhaust flange and the exhaust seat, the exhaust piston is arranged in the exhaust pipe; the exhaust pipe is provided with a plurality of inner exhaust holes, and the exhaust seat is provided with outer exhaust holes.

It is also preferred that the lower cylinder mechanism includes a lower pushing rod, a lower box, a lower cylinder, a lower sealing piston, a lower pushing piston, a sealing seat, a collecting box and an exhaust device, and the lower opening of the lower box It is fixedly connected with the rotor shell, the lower box body is equipped with a sealing seat on one side, and a lower cylinder and a collecting box are installed on the other side in sequence; the front end of the lower push rod is coaxially installed with a lower sealing piston, and the front end of the lower sealing piston A lower connecting shaft is coaxially arranged, the front end of the lower connecting shaft informs the setting of a lower pushing piston, and the end of the lower pushing rod is also provided with a lower pushing roller.

It is also preferred that the piston drive mechanism includes a groove frame, a groove wheel and a groove wheel motor, the groove wheel frame is fixed on the same side of the upper cylinder mechanism and the lower cylinder mechanism, and the groove wheel motor is installed on the groove wheel frame , The output shaft of the sheave motor is connected with the sheave wheel, and the upper push roller and the lower push roller are fixed in the through groove along the groove.

It is also preferred that the through grooves on the sheave wheel are arranged symmetrically, and the through grooves include an upper parallel section, a lower parallel section and an inclined section. Set, the inclined section connects the upper parallel section and the lower parallel section.

It is further preferred that when the double-piston pneumatic conveyor is working, the sheave motor drives the sheave to rotate, the upper push rod drives the upper sealing piston to seal the position between the upper cylinder and the upper box, and the material in the hopper falls into the upper At the same time, the lower pushing rod drives the lower pushing piston to push the material in the lower cylinder to the lower box; the wheel groove continues to rotate, and the upper pushing rod drives the upper pushing piston to push the material in the upper cylinder to the upper box and drop Into the lower cylinder, the exhaust piston of the exhaust device opens to complete the exhaust. At this time, the lower push rod drives the sealing piston to seal the position between the lower cylinder and the lower box; the material falls from the lower box into the rotor shell and passes through the cone. The material of the shape divider falls into the material cavity of the rotor and rotates with the rotor mechanism. The material in the material cavity is continuously sprayed and transported through the discharge port.

Beneficial effect

The beneficial effects of a double-piston pneumatic conveyor provided by the present invention include:

(1) The conveyor is driven by a piston drive mechanism, which simplifies the structure of the equipment. In addition, the assembly structure of the rotor mechanism, the upper cylinder mechanism, the lower cylinder mechanism and the hydraulic mechanism is compact. The piston drive mechanism makes the upper cylinder mechanism and The lower cylinder barrel mechanism cooperates with each other to realize the sealing during the feeding process, reduce dust generation, and increase the spray distance.

(2) The pushing piston and the sealing piston of the conveyor are separated, which shortens the contact distance between the piston and the cylinder and the material, thereby reducing the sealing of the piston and prolonging the service life of the piston; the material stopper ensures the orderly feeding of the hopper , Avoiding the material in the hopper from directly entering the lower cylinder; by setting the collecting box to form a sealed space, and the collecting box can also collect the less material entrained by the lower pushing piston.

(3) When the pneumatic conveyor is working, one of the sealing pistons is always in a sealed state, thereby ensuring the overall sealing of the equipment, preventing dust from escaping, ensuring the sealing performance and increasing the conveying distance; the cone distributor distributes the falling materials to the rotor In each material cavity, the continuity of concrete conveying and shotcrete is realized, and the shotcrete pulse is reduced.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a double-piston pneumatic conveyor;

Figure 2 is a schematic diagram of part of the double-piston pneumatic conveyor;

Figure 3 is a partial internal schematic diagram of a dual-piston pneumatic conveyor;

Figure 4 is a schematic diagram of the rotor mechanism;

Figure 5 is a schematic diagram of the rotor housing structure;

Figure 6 is a schematic diagram of the structure of the air intake device;

Figure 7 is a schematic view of the structure of the rotor;

Figure 8 is a partial structural diagram of the lower cylinder mechanism;

Figure 9 is a schematic sectional view of the structure of the lower cylinder tube;

Figure 10 is a partial structural diagram of the upper cylinder mechanism;

Figure 11 is a schematic cross-sectional view of the upper cylinder mechanism;

Figure 12 is a schematic sectional view of the exhaust device;

Figure 13 is a schematic diagram of the exhaust pipe structure;

Figure 14 is a schematic diagram of a piston driving mechanism;

Figure 15 is a schematic diagram of the structure of a sheave;

In the picture: 1-frame, 2-rotor mechanism, 3-lower cylinder mechanism, 4-upper cylinder mechanism, 5-hopper, 6-piston drive mechanism, 7-hydraulic mechanism;

201-gear box, 202-motor seat, 203-drive motor, 204-housing leg, 205-cone distributor, 206-air inlet, 207-rotor, 208-rotor housing, 209-seal seat, 210 -Discharge port, 211-air inlet mounting seat, 212-mounting plate, 213-air outlet, 214-material cavity;

301-lower pushing roller, 302-lower roller mounting seat, 303-linear bearing, 304-sealing seat, 305-lower box, 306-lower cylinder, 307-collecting box, 308-lower pushing piston, 309-lower connecting shaft, 310-lower sealing piston, 311-lower push rod;

401-upper push roller, 402-upper roller mount, 403-upper push rod, 404-upper push piston, 405-upper connecting shaft, 406-upper seal piston, 407-exhaust rod, 408-gauge Piece, 409-upper cylinder, 410-upper box, 411-exhaust device;

411-1 exhaust flange, 411-2 exhaust seat, 411-3 exhaust pipe, 411-4 exhaust piston; 411-5 inner exhaust hole; 411-6 outer exhaust hole;

601-slot wheel frame, 602-slot wheel, 603-slot wheel motor.

Embodiments of the present invention

As shown in Figures 1 to 15, the specific implementation of a dual-piston pneumatic conveyor provided by the present invention is as follows.

A dual-piston pneumatic conveyor includes a frame 1, a rotor mechanism 2, an upper cylinder mechanism 4, a lower cylinder mechanism 3, a piston driving mechanism 6 and a hydraulic mechanism 7. The frame 1 is used to carry the pneumatic conveyor structure and assist the pneumatic conveyor to travel. The cylinder mechanism arranged in parallel up and down is used to control the material supply rotor mechanism 2, especially the sealing design of the upper and lower cylinder mechanisms in the working process. It has a good seal and improves the service life of the equipment; the rotor mechanism 2 is used to evenly distribute materials and realize the continuous conveying of concrete, reducing pulses, and the hydraulic mechanism 7 provides power for each working part of the equipment. The conveyor can be used in the chemical industry, mines and coal mines to transport powder, fine particles and other materials in the pipeline under the action of compressed air.

The hydraulic mechanism 7 is used to achieve hydraulic drive. The hydraulic mechanism 7 is arranged on the rear side of the frame and supplies liquid through components such as an oil tank and an oil pump motor. The oil tank and the oil pump motor are respectively installed on the left and right sides of the rear end of the chassis. The rotor mechanism 2 is used for spraying concrete. The rotor mechanism is fixed on the front side of the chassis and sprays materials from below the front of the conveyor. The lower cylinder mechanism 3 is arranged above the rotor mechanism, the upper cylinder mechanism 4 is arranged above the lower cylinder mechanism, and the hopper is installed above the upper cylinder of the upper cylinder mechanism. The hopper 5 is fixedly connected to the upper cylinder of the upper cylinder mechanism 4, which can be flanged or welded. The upper cylinder 409 is connected to the upper box 410, and the bottom of the upper box 410 is connected to the lower cylinder 306. The lower cylinder The cylinder 306 is connected to the lower case 305, which is arranged above the rotor housing 208 of the rotor mechanism and communicates with it. The piston driving structure is provided with a wheel groove 602, and the mounting positions of the upper pushing roller 401 and the lower pushing roller 301 are opposite to each other in the wheel groove, so as to ensure that the upper pushing roller and the lower pushing roller extend in opposite directions. The frame 1 includes a bottom frame and walking wheels. The walking wheels are set at the bottom of the bottom frame. One walking wheel can be set at the four corners of the bottom frame. The bottom frame can be made of steel welding. The walking wheels can be selected according to the use environment. Walking wheel structure.

The rotor mechanism 2 includes a rotor housing 208, a rotor 207, a tapered distributor 205, an air inlet 206, a discharge port 210, a housing leg 204, and a drive mechanism. The drive mechanism includes a drive motor 203, a gear box 201, and a motor seat 202. The rotor housing 208 is fixed above the gear box through the housing legs, the rotor 207 is in the rotor housing 208 and is connected to the output shaft of the gear box 201, and the conical distributor 205 is arranged above the rotor. A sealing seat is also provided between the rotor housing 208 and the output shaft of the gearbox 201, a 0-shaped sealing ring is arranged inside the sealing seat 304, and a discharge port is installed at the bottom of the rotor housing 208, which is on the same side as the discharge port 210. An air inlet is also provided above the rotor shell. The input end of the gear box 201 is fixedly mounted on the motor base 202, and the motor output shaft and the gear box input shaft are connected by splines. The rotor 207 is in the shape of a ring as a whole, and a plurality of partitions are evenly arranged along the ring. The partitions are arranged along the radius of the rotor. A plurality of material cavities 214 are formed between the partitions. The lower side of the material cavity 214 is open. The mounting hole and the output shaft of the gearbox are matched for installation. The mounting hole may be oblate, and the output shaft of the gearbox 201 may also be oblate. In addition, the rotor housing 208 has a cylindrical shape as a whole, with a fixing plate provided on the lower side, and a sealing hole and a discharge hole are provided on the fixed plate; an air inlet mounting seat is provided on the side surface of the rotor housing 208, and the air inlet mounting seat is used for The air inlet device is fixedly installed. The air inlet device includes a mounting plate 212 and an air outlet 213. The mounting plate and the air inlet mounting seat are installed in cooperation with each other. The air outlet 213 of the air inlet device partially extends into the rotor housing, and the shape of the air outlet is The rotor material cavity 214 has the same contour shape, which facilitates spraying and feeding.

The upper cylinder mechanism 4 includes an upper push rod 403, an upper box body 410, an upper cylinder tube 409, an upper sealing piston 406, an upper pushing piston 404, a stopper 408 and an exhaust device 411. The upper box body and the lower cylinder tube pass The mounting flange is fixedly connected, the upper cylinder barrel is connected with the upper box body, and the end of the upper box body is provided with an exhaust device. The front end of the upper push rod is coaxially installed with a pusher piston, the front end of the upper pusher piston is coaxially provided with an upper connecting shaft, the front end of the upper connecting shaft is fixedly equipped with an upper sealing piston, and the front end of the upper sealing piston is fixed with an exhaust rod along the axis; The material piston fits in the upper cylinder barrel and slides along the inner wall of the upper cylinder barrel. The sealing position of the upper seal piston is at the junction position between the upper cylinder barrel and the upper box body. When the upper seal piston is opened, it enters the upper box body. Contact to avoid contact wear. A plurality of material stoppers are arranged coaxially on the upper connecting shaft, and an upper push roller is also arranged at the end of the upper push rod, and the material stoppers can place materials directly into the upper box body from the hopper. The exhaust device 411 includes an exhaust flange 411-1, an exhaust pipe 411-3 and an exhaust seat 411-2. The exhaust flange 411-1 is fixed at the end of the upper box, and the exhaust pipe is connected to the upper box. . The exhaust pipe passes through the exhaust flange and the exhaust seat, and the exhaust piston 411-4 is arranged in the exhaust pipe. The exhaust pipe is provided with a plurality of inner exhaust holes 411-5, and the exhaust seat is provided with outer exhaust holes. The exhaust rod is connected with the exhaust piston. When exhausting, the exhaust rod pushes the exhaust piston, and the exhaust piston moves. After the gas enters the exhaust pipe from the upper box, it enters the exhaust pipe through the inner exhaust hole on the exhaust pipe. The air seat is finally discharged through the outer exhaust hole 411-6 of the exhaust seat.

The lower cylinder mechanism 3 includes a lower pushing rod 311, a lower box 305, a lower cylinder 306, a lower sealing piston 310, a lower pushing piston 308, a sealing seat 304 and a collecting box 307. The lower opening of the lower box body is fixedly connected with the rotor shell, which can be connected by a flange. A sealing seat is installed on one side of the lower box body. The lower push rod passes through the sealing seat and moves along the axis. For linear bearings, the lower cylinder tube and the collecting box are installed in sequence on the other side. The front end of the lower push rod is coaxially installed with a lower sealing piston, the front end of the lower sealing piston is coaxially provided with a lower connecting shaft, the front end of the lower connecting shaft is notified to set a lower pusher piston, and the end of the lower push rod is also provided with a lower push roller, which pushes down. The roller is mounted on the lower roller mounting seat, the lower pushing roller is provided with a roller, and the axis direction of the roller and the axis of the lower pushing rod are perpendicular to each other. The sealing position of the lower sealing piston is at the junction of the lower box body and the lower cylinder tube. When the lower sealing piston is opened, it enters the lower box body, so the lower sealing piston rarely comes into contact with the material, avoiding contact wear.

The piston drive mechanism includes a groove frame 601, a groove wheel 602 and a groove wheel motor 603. The groove wheel frame 601 is fixed on the same side of the upper cylinder mechanism 4 and the lower cylinder mechanism 3, and the groove wheel motor 603 is installed on the groove wheel machine. On the frame 601, the output shaft of the sheave motor is connected with the sheave wheel, the upper push roller and the lower push roller are fixed in the through groove along the groove, and the upper push roller 401 and the lower push roller 401 and the lower push roller along with the rotation of the wheel groove 602 The rollers 301 telescopically move in the axial direction, respectively. The through grooves on the lower sheave are arranged symmetrically. The through grooves include an upper parallel section, a lower parallel section and an inclined section. The upper parallel section and the lower parallel section are respectively arranged at both ends of the groove axis and parallel to the circumference of the groove wheel. The inclined section connects the upper parallel section and the lower parallel section. When the upper push roller or the lower push roller are in the upper parallel section and the lower parallel section respectively, the upper sealing piston is in the sealing position, and the lower sealing piston is opened. When the upper push roller is in the upper parallel section, the upper push rod does not move , When the upper push roller enters the inclined section, the upper push rod moves along its own axis.

When the double-piston pneumatic conveyor is working, the sheave motor drives the sheave to rotate, and the upper push rod drives the upper sealing piston to seal the position between the upper cylinder and the upper box. The material in the hopper falls into the upper cylinder and moves down at the same time. The pushing rod drives the lower pushing piston to push the material in the lower cylinder to the lower box; the wheel groove continues to rotate, and the upper pushing rod drives the upper pushing piston to push the material from the upper cylinder to the upper box and fall into the lower cylinder. The exhaust piston of the exhaust device is opened to complete the exhaust. At this time, the lower push rod drives the sealing piston to seal the position between the lower cylinder and the lower box; the material falls from the lower box into the rotor shell, and the material falls through the cone divider. The material cavity of the rotor rotates with the rotor mechanism, and the material in the material cavity is continuously sprayed and transported through the discharge port.

Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention shall also belong to the present invention. The scope of protection of the invention.

Claims

A dual-piston pneumatic conveyor, which is characterized in that it comprises a frame, a rotor mechanism, an upper cylinder mechanism, a lower cylinder mechanism, a piston drive mechanism, and a hydraulic mechanism. The hydraulic mechanism is arranged on the rear side of the base frame. The mechanism is fixed on the front side of the underframe; the rotor mechanism is used for spraying concrete, and the hydraulic mechanism is used for hydraulic drive; the lower cylinder mechanism is arranged above the rotor mechanism, and the upper cylinder mechanism is arranged above the lower cylinder mechanism , The hopper is installed above the upper cylinder of the upper cylinder mechanism; the hopper and the upper cylinder of the upper cylinder mechanism are fixedly connected, the upper cylinder communicates with the upper box, and the lower part of the upper box is connected with the lower cylinder, and the lower The cylinder barrel is connected with the lower box body, the lower box body is arranged above the rotor shell of the rotor mechanism; the piston driving structure is provided with a wheel groove, and the mounting positions of the upper pushing roller and the lower pushing roller are opposite to each other in the wheel groove.
The dual-piston pneumatic conveyor according to claim 1, wherein the rotor mechanism includes a rotor housing, a rotor, a conical distributor, an air inlet, a material outlet, a housing leg, and a driving mechanism The drive mechanism includes a drive motor, a gear box and a motor seat. The rotor housing is fixed above the gear box through the housing legs. The rotor is in the rotor housing and connected to the output shaft of the gear box. The cone distributor is arranged above the rotor. A sealing seat is also provided between the rotor housing and the output shaft of the gearbox, a 0-shaped sealing ring is arranged inside the sealing seat, a discharge port is installed at the bottom of the rotor housing, and the rotor housing on the same side as the discharge port An air inlet is also arranged on the upper side; the input end of the gear box is fixedly installed on the motor seat, and the motor output shaft and the gear box input shaft are connected by a spline.
The dual-piston pneumatic conveyor according to claim 2, wherein the rotor has a ring shape, a plurality of partitions are evenly arranged along the radius of the rotor, and a plurality of material cavities are formed between the partitions. An opening is provided on the lower side; an air inlet device is installed at the air inlet, and the air inlet device extends into the rotor shell, and the air outlet of the air inlet device has the same shape as the trough on the rotor.
The dual-piston pneumatic conveyor according to claim 1, wherein the upper cylinder mechanism includes an upper pushing rod, an upper box, an upper cylinder, an upper sealing piston, an upper pushing piston, and a stopper. The upper box and the lower cylinder are fixedly connected by a mounting flange, the upper cylinder and the upper box are connected, and the end of the upper box is provided with an exhaust device; the front end of the upper push rod is installed coaxially There is a pushing piston, the front end of the upper pushing piston is coaxially provided with an upper connecting shaft, the front end of the upper connecting shaft is fixedly equipped with an upper sealing piston, and the front end of the upper sealing piston is fixed with an exhaust rod along the axis; the upper connecting shaft is also coaxial A plurality of baffles are arranged, and an upper pushing roller is also arranged at the end of the upper pushing rod.
The dual-piston pneumatic conveyor according to claim 4, wherein the exhaust device includes an exhaust flange, an exhaust pipe, and an exhaust seat, and the exhaust flange is fixed on the upper box. At the end, the exhaust pipe communicates with the upper box; the exhaust pipe passes through the exhaust flange and the exhaust seat, and the exhaust piston is arranged in the exhaust pipe; the exhaust pipe is provided with a plurality of inner exhausts The exhaust seat is provided with an outer exhaust hole.
The dual-piston pneumatic conveyor according to claim 4, wherein the lower cylinder mechanism includes a lower pushing rod, a lower box, a lower cylinder, a lower sealing piston, a lower pushing piston, and a sealing seat. With the collecting box, the lower opening of the lower box body is fixedly connected with the rotor shell, and a sealing seat is installed on one side of the lower box body, and a lower cylinder tube and a collecting box are installed on the other side in turn; the lower push rod A lower sealing piston is coaxially installed at the front end, a lower connecting shaft is arranged coaxially at the front end of the lower sealing piston, a lower pushing piston is provided at the front end of the lower connecting shaft, and a lower pushing roller is also arranged at the end of the lower pushing rod.
The dual-piston pneumatic conveyor according to claim 6, wherein the piston driving mechanism includes a groove frame, a groove wheel and a groove wheel motor, and the groove wheel frame is fixed on the upper cylinder mechanism and the lower cylinder. On the same side of the cylinder mechanism, the sheave motor is installed on the sheave frame, the output shaft of the sheave motor is connected with the sheave, and the upper and lower push rollers are fixed in the through grooves along the groove.
The dual-piston pneumatic conveyor according to claim 7, wherein the through grooves on the sheave wheel are arranged symmetrically, and the through grooves include an upper parallel section, a lower parallel section and an inclined section, and an upper parallel section and a lower The parallel sections are respectively arranged at both ends of the wheel groove in the axial direction and along the circumference of the groove wheel, and the inclined section is connected with the upper parallel section and the lower parallel section.
The double-piston pneumatic conveyor according to claim 7, wherein when the double-piston pneumatic conveyor is working, the sheave motor drives the sheave to rotate, and the upper push rod drives the upper sealing piston to seal the upper cylinder and At the position between the upper box, the material in the hopper falls into the upper cylinder, and at the same time, the lower pushing rod drives the lower pushing piston to push the material in the lower cylinder to the lower box; the wheel groove continues to rotate, and the upper push rod drives the upper The pushing piston pushes the material of the upper cylinder to the upper box and falls into the lower cylinder. The exhaust piston of the exhaust device opens to complete the exhaust. At this time, the lower pushing rod drives the sealing piston to seal the position between the lower cylinder and the lower box. The material falls into the rotor shell from the lower box, and the material falls into the material cavity of the rotor through the conical distributor, and rotates with the rotor mechanism, and the material in the material cavity is continuously sprayed and transported through the discharge port.