Suction conveying type pneumatic conveying system and method

Abstract

The invention discloses a suction conveying type pneumatic conveying system and method, and relates to the technical field of material conveying. The suction conveying type pneumatic conveying system comprises a feeding part, a gas-material separation part and a power part; the power part and the feeding part are respectively connected with a middle bin of the gas-material separation part through an exhaust pipe and a material conveying main pipe; the invention further discloses a suction type pneumatic conveying method. The suction type pneumatic conveying method comprises the steps of obtaining the vacuum degree needed by material suction, sucking materials at all point positions, separating gas from the materials and discharging the materials. The problem of dust flying of a traditional single-bin pump type pneumatic conveying process when materials are taken from an open-type stock bin at the starting end of the materials is effectively solved, synchronous continuous operation of material taking and feeding is achieved, stable raw material supply is provided for downstream processes, and the technical blank of environment-friendly material taking in the open-type stock bin in the industry is filled up.

Description

A suction-type pneumatic conveying system and method Technical Field

[0001] This invention relates to the field of material conveying technology, specifically to a system and method for suction-type pneumatic conveying of powdery or granular materials. Background Technology

[0002] According to the book "Conveying Processes and Equipment" (edited by Liao Chuanhua et al., published by China Petrochemical Press), the method of using gas flow within pipes to transport powdery or granular solids is called pneumatic conveying. Among these methods, single-compartment pump pneumatic conveying is increasingly used in process industry production due to its advantages such as a closed system and small footprint. However, this technology has the following technical drawbacks in production applications: it is not suitable for continuous conveying processes because the feeding and blowing of the compartment pump are intermittent operations, meaning that the processes of feeding into the compartment and expelling material from the compartment alternate, making continuous material conveying impossible.

[0003] Not suitable for open silo feeding: Silo-type pneumatic conveying is a pressure-type pneumatic conveying technology, which relies on a stable positive pressure formed by a closed cavity and pipeline system to propel powdery materials. Both feeding and blowing are completed within a closed system. When the material originates in an open silo, grab bucket cranes or other devices are required for material removal, which generates a large amount of dust, causing environmental pollution. Therefore, single-silo pump pneumatic conveying is not suitable for processes where the material originates in an open silo. Summary of the Invention

[0004] To address the problem that existing single-compartment pump-type pneumatic conveying technology is not suitable for continuous conveying and open silo feeding, this invention provides a suction-type pneumatic conveying system and method that enables simultaneous feeding and receiving of powdery materials, continuous material conveying, and direct feeding from open silos without dust dispersion.

[0005] To achieve the above objectives, the present invention provides a suction-type pneumatic conveying system, comprising: a feeding section, an air-material separation section connected to the feeding section via a conveying main pipe, and a power section connected to an intermediate chamber of the air-material separation section via an air extraction pipe; the feeding section is a multi-joint robotic arm equipped with a conveying pipe, the number of sections and length of the robotic arm being selected according to the size of the external material silo; by controlling the movement of the multi-joint robotic arm, the suction port can reach different positions in the material silo for continuous suction; after being sucked in from the suction port of the feeding section, the material travels along the conveying main pipe to the air-material separation section, and after air-material separation, the material enters the equipment for the next process.

[0006] As a further improvement of the present invention, the feeding section includes: a first end arm, a second end arm, a third end arm, a fourth end arm, and a rotary table, which are sequentially hinged; a first hydraulic system hinged between the first end arm and the second end arm, a second hydraulic system hinged between the second end arm and the third end arm, a third hydraulic system hinged between the third end arm and the fourth end arm, and a fourth hydraulic system hinged between the fourth end arm and the rotary table; a first conveying pipe fixed to the first end arm, a second conveying pipe fixed to the second end arm, a third conveying pipe fixed to the third end arm, and a fourth conveying pipe fixed to the fourth end arm; a first hose connecting the first conveying pipe and the second conveying pipe, a second hose connecting the second conveying pipe and the third conveying pipe, a third hose connecting the third conveying pipe and the fourth conveying pipe, and a fourth hose connecting the fourth conveying pipe and the main conveying pipe.

[0007] As a further improvement of the present invention, the other end of the first conveying pipe is connected to a suction head via a flange; a first motor is fixedly mounted on the suction head, and a third gear is fixedly connected to the output shaft of the first motor; a auger is rotatably mounted on the suction head opposite the position of the first conveying pipe, and a gear is fixedly sleeved on the outside of the auger to mesh with the third gear; the first motor drives the third gear, thereby driving the auger to rotate.

[0008] As a further improvement of the present invention, a rotary table is rotatably mounted on the base of the robotic arm via a rotating shaft. A second motor is fixedly mounted on the rotary table, and a second gear is fixedly connected to the output shaft of the second motor. A first gear that meshes with the second gear and is coaxial with the rotating shaft of the rotary table is fixedly mounted on the base of the robotic arm. The second motor drives the second gear to rotate the rotary table around the rotating shaft, thereby driving the fourth end arm to rotate, thus realizing the rotation of the entire robotic arm. The control box is mounted on the rotary table and electrically connected to the first motor, the second motor, the third motor, and the fourth motor.

[0009] As a further improvement of the present invention, in the feeding section, the front end of the robotic arm is provided with a suction head, and the suction head is equipped with a auger driven by a first motor. The rotation of the auger plays the role of gathering and loosening the material.

[0010] As a further improvement of the present invention, the gas-material separation unit includes: an intermediate silo connected to a conveying main pipe, a bag filter dust collector disposed inside the intermediate silo, and a pulse dust collector disposed on the top of the intermediate silo and cooperating with the bag filter dust collector; the pulse dust collector is connected to an air storage tank through an air pipe to achieve the purpose of separating gas and material; the bottom of the intermediate silo is connected to the upper end of an airlock valve and the lower end is connected to a reversing valve; the airlock valve is connected to a third motor through a transmission chain and is driven by the third motor; by operating the reversing valve, the material can be sent to different process flow equipment.

[0011] As a further improvement of the present invention, the power unit includes: an exhaust pipe connected to the intermediate chamber and a Roots blower connected to the other end of the exhaust pipe; a fourth motor is connected to the Roots blower via a V-belt to drive the Roots blower to run, and an exhaust pipe is connected to the exhaust side of the Roots blower to exhaust the air separated from the gas-material separation section.

[0012] As a further improvement of the present invention, an airlock valve is installed between the intermediate silo and the reversing valve to ensure that the material in the intermediate silo is continuously discharged while preventing the material from being drawn back in the opposite direction, thus achieving the purpose of simultaneous and continuous material suction and discharge.

[0013] As a further improvement of the present invention, in the power unit, an electric contact pressure gauge and a regulating valve are installed on the air extraction pipe, and the electric contact pressure gauge and the regulating valve are electrically connected. When the vacuum value inside the air extraction pipe reaches the upper limit of the electric contact pressure gauge, the electric contact pressure gauge triggers the regulating valve to perform an opening action, and air enters the air extraction pipe through the regulating valve, reducing the vacuum value inside the air extraction pipe and the intermediate chamber. When the vacuum value inside the air extraction pipe drops to the lower limit of the electric contact pressure gauge, the electric contact pressure gauge triggers the regulating valve to perform a closing action, cutting off the air from entering the air extraction pipe, increasing the vacuum value inside the air extraction pipe and the intermediate chamber, and maintaining the vacuum value inside the intermediate chamber within a certain range.

[0014] This invention also provides a suction-type pneumatic conveying method, applied to the aforementioned suction-type pneumatic conveying system, comprising the following steps: S1, obtaining the vacuum degree required for material suction; in this step, by starting the fourth motor, the Roots blower is driven to operate via a V-belt, extracting the air inside the intermediate silo and the conveying main pipe, generating a certain vacuum degree in the air-material separation section and the feeding section, providing power for material suction; S2, suctioning material at each point; in this step, the remote control of the robotic arm controls the extension and retraction of hydraulic cylinders one, two, three, and four to adjust the opening and closing angle of the robotic arm, while simultaneously controlling the operation of the second motor via the remote control to drive the rotary table to rotate horizontally, thereby achieving... The robotic arm's suction port reaches the designated point to pick up materials scattered in various locations. The materials are sucked in from the suction port and drawn along the first, second, third, and fourth conveying pipes and the main conveying pipe into the intermediate chamber of the air-material separation section; S3, air-material separation; In this step, the materials are separated from the air. After the air-material mixture reaches the intermediate chamber, the air is purified by a bag filter dust collector. The purified air is discharged from the exhaust pipe through the exhaust pipe of the Roots blower; the materials fall to the bottom of the intermediate chamber and are collected under their own gravity and the combined action of the pulse dust collector; S4, material discharge; In this step, the materials collected at the bottom of the intermediate chamber are discharged through the airlock valve and discharged through the reversing valve under their own gravity.

[0015] The beneficial effects of this invention are as follows: This invention forms a stable negative pressure environment with a certain degree of vacuum within the system, and uses negative pressure to transport powdery materials. This effectively solves the problem of dust flying in the traditional single-compartment pump pneumatic conveying process when the material is taken from an open silo at the starting end. It also realizes the synchronous and continuous operation of material taking and feeding, providing a stable supply of raw materials for downstream processes and filling the technical gap in environmentally friendly material taking in open silos in the industry. Attached Figure Description

[0016] Figure 1 is a general schematic diagram of Embodiment 1 of the present invention; Figure 2 is a schematic diagram of the feeding section of Embodiment 1; Figure 3 is a partial enlarged view of point A in Figure 2; Figure 4 is a schematic diagram of the gas-material separation section of Embodiment 1; Figure 5 is a schematic diagram of the power section of Embodiment 1; Figure 6 is a process flow diagram of Embodiment 2 of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Feeding section, 2. Gas-material separation section, 3. Power unit, 101. Suction inlet, 102. Screw, 103. Third gear, 104. Suction head, 105. First motor, 106. First conveying pipe, 107. First end arm, 108. No. 1 hydraulic system, 109. First hose, 110. Second end arm, 111. Second conveying pipe, 112. Second hose, 113. No. 2 hydraulic system, 114. Third conveying pipe, 115. Third end arm, 116. Third hose, 117. No. 3 hydraulic system, 118. Main conveying pipe, 119. Fourth conveying pipe, 120. Fourth end arm 121. Fourth hose, 122. Control box, 123. No. 4 hydraulic system, 124. Rotary table, 125. First gear, 126. Base, 127. Second motor, 128. Second gear, 201. Air tank, 202. Air pipe, 203. Pulse dust collector, 204. Bag dust collector, 205. Intermediate silo, 206. Airlock valve, 207. Reversing valve, 208. Third motor, 301. Fourth motor, 302. Roots blower, 303. Exhaust pipe, 304. Silencer, 305. Electrical contact pressure gauge, 306. Regulating valve, 307. Exhaust pipe, 308. V-belt. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 In this example, referring to Figures 1-5, a suction-type pneumatic conveying system of the present invention includes: a feeding unit 1, a pneumatic-material separation unit 2 connected to the feeding unit 1 via a conveying main pipe 118, and a power unit 3 connected to the intermediate chamber 205 of the pneumatic-material separation unit 2 via an exhaust pipe 303; the feeding unit 1 is a multi-joint robotic arm equipped with a conveying pipe. The number of sections and the length of the robotic arm are selected according to the size of the external material chamber. By controlling the movement of the multi-joint robotic arm, the suction port 101 can reach different positions in the material chamber for continuous suction. After being sucked in from the suction port 101 of the feeding unit 1, the material reaches the pneumatic-material separation unit 2 along the conveying main pipe 118. After pneumatic-material separation, the material enters the equipment for the next process.

[0020] Further, referring to Figures 2-3, the feeding section 1 includes: a first end arm 107, a second end arm 110, a third end arm 115, a fourth end arm 120, and a rotary table 124, which are sequentially hinged; a first hydraulic system 108 hinged between the first end arm 107 and the second end arm 110; a second hydraulic system 113 hinged between the second end arm 110 and the third end arm 115; a third hydraulic system 117 hinged between the third end arm 115 and the fourth end arm 120; and a fourth hydraulic system 123 hinged between the fourth end arm 120 and the rotary table 124; a first conveying pipe 106 fixed to the first end arm 107; and a second conveying pipe 104 fixed to the second end arm 110. Two feed pipes 111, a third feed pipe 114 fixed to the third end arm 115, and a fourth feed pipe 119 fixed to the fourth end arm 120; a first hose 109 connecting the first feed pipe 106 and the second feed pipe 111, a second hose 112 connecting the second feed pipe 111 and the third feed pipe 114, a third hose 116 connecting the third feed pipe 114 and the fourth feed pipe 119, and a fourth hose 121 connecting the fourth feed pipe 119 and the feed main pipe 118; preferably, the first feed pipe 106, the second feed pipe 111, the third feed pipe 114, and the fourth feed pipe 119 are respectively fixed to the corresponding end arms by pipe clamps.

[0021] Preferably, in the feeding section 1, each conveying pipe and the main conveying pipe 118 is a metal pipe with ceramic lining on the inner wall, which enhances the wear resistance of each conveying pipe and extends its service life.

[0022] In the above setup, each conveying pipe is combined with a hydraulic device through an end arm to form a multi-joint robotic arm. The number of sections and length of the robotic arm are selected according to the size of the material bin. By controlling the movement of the multi-joint robotic arm, the suction port 101 can reach different positions in the material bin for continuous material suction.

[0023] In the above setup, the opening and closing angle of the corresponding end arm can be adjusted by controlling the corresponding hydraulic pressure, thereby controlling the position of the actuator at the end of the first end arm to pick up materials from different points.

[0024] In the above setup, by installing various flexible hoses, the angle between each conveying pipe can be adjusted while maintaining a tight seal at each connection point to prevent air leakage.

[0025] Furthermore, the other end of the first conveying pipe 106 is connected to a suction head 104 via a flange; a first motor 105 is fixedly mounted on the suction head 104, and a third gear 103 is fixedly connected to the output shaft of the first motor 105; a auger 102 is rotatably mounted on the suction head 104 opposite to the position of the first conveying pipe 106, and a gear is fixedly sleeved on the outside of the auger 102 to mesh with the third gear 103; the first motor 105 drives the third gear 103, thereby driving the auger 102 to rotate.

[0026] Furthermore, the rotary table 124 is rotatably mounted on the robotic arm base 126 via a rotating shaft. A second motor 127 is fixedly mounted on the rotary table 124, and a second gear 128 is fixedly connected to the output shaft of the second motor 127. A first gear 125, which meshes with the second gear 128 and is coaxial with the rotating shaft of the rotary table 124, is fixedly mounted on the robotic arm base 126. The second motor 127 drives the second gear 128 to rotate the rotary table 124 around the rotating shaft, thereby driving the fourth end arm 120 to rotate, thus realizing the rotation of the entire robotic arm. The control box 122 is mounted on the rotary table 124 and electrically connected to the first motor 105, the second motor 127, the third motor 208, and the fourth motor 301.

[0027] Furthermore, in the feeding section 1, the front end of the robotic arm is provided with a suction head 104, and a auger 102 driven by a first motor 105 is installed on the suction head 104. The rotation of the auger 102 plays the role of gathering and loosening the material.

[0028] Preferably, in the feeding section 1, a grid is provided at the suction port 101 to prevent ore or debris from being sucked into the conveying pipe and causing blockage.

[0029] Furthermore, referring to Figure 4, the gas-material separation unit 2 includes: an intermediate silo 205 connected to a conveying main pipe 118, a bag filter 204 disposed inside the intermediate silo 205, and a pulse dust collector 203 disposed on the top of the intermediate silo 205 and cooperating with the bag filter 204; the pulse dust collector 203 is connected to the gas storage tank 201 through an air pipe 202 to achieve the purpose of separating gas and material; the bottom of the intermediate silo 205 is connected to the upper end of the airlock valve 206, and the lower end is connected to the reversing valve 207. The airlock valve 206 is connected to the third motor 208 through a transmission chain and is driven by the third motor 208. By operating the reversing valve 207, the material can be sent to different process flow equipment.

[0030] Furthermore, referring to Figure 5, the power unit 3 includes: an exhaust pipe 303 connected to the intermediate chamber 205, and a Roots blower 302 connected to the other end of the exhaust pipe 303; a fourth motor 301 is connected to the Roots blower 302 via a V-belt 308 to drive the Roots blower 302 to run, and an exhaust pipe 307 is connected to the exhaust side of the Roots blower 302 to exhaust the air separated by the air-material separation unit 2.

[0031] Furthermore, in the gas-material separation unit 2, in order to prevent the material from being drawn back to the intermediate chamber 205 from the next process of the reversing valve 207, an airlock valve 206 is installed between the intermediate chamber 205 and the reversing valve 207. This ensures that the material in the intermediate chamber 205 is continuously discharged, while also preventing the material from being drawn back, thus achieving the purpose of simultaneous and continuous material suction and discharge.

[0032] Preferably, in the power unit 3, in order to avoid noise pollution when the Roots blower 302 discharges air from the exhaust pipe 307, a silencer 304 is installed at the end of the exhaust pipe 307.

[0033] Furthermore, in the power unit 3, an electric contact pressure gauge 305 and a regulating valve 306 are installed on the air extraction pipe 303, and the electric contact pressure gauge 305 and the regulating valve 306 are electrically connected. When the vacuum value inside the air extraction pipe 303 reaches the upper limit of the electric contact pressure gauge 305, the electric contact pressure gauge 305 triggers the regulating valve 306 to perform an opening action, and air enters the air extraction pipe 303 through the regulating valve 306, reducing the vacuum value inside the air extraction pipe 303 and the intermediate chamber 205. When the vacuum value inside the air extraction pipe 303 drops to the lower limit of the electric contact pressure gauge 305, the electric contact pressure gauge 305 triggers the regulating valve 306 to perform a closing action, cutting off the air from entering the air extraction pipe 303, increasing the vacuum value inside the air extraction pipe 303 and the intermediate chamber 205, and maintaining the vacuum value inside the intermediate chamber 205 within a certain range.

[0034] Example 2 (Referring to Figure 6) also provides a suction-type pneumatic conveying method applied to the above-mentioned suction-type pneumatic conveying system, including the following steps: S1, obtaining the vacuum degree required for material suction; in this step, by starting the fourth motor 301, the Roots blower 302 is driven to operate through the V-belt 308, extracting the air inside the intermediate chamber 205 and the conveying main pipe 118, generating a certain vacuum degree in the air-material separation section 2 and the feeding section 1, providing power for material suction; S2, suctioning material at each point; in this step, the remote control of the robotic arm controls the extension and retraction of the first hydraulic 108, the second hydraulic 113, the third hydraulic 117, and the fourth hydraulic 123 to adjust the opening and closing angle of the robotic arm, and at the same time controls the operation of the second motor 127 through the remote control to drive the rotary table 124 to rotate horizontally, thereby realizing the suction of the robotic arm. Inlet 101 reaches the designated point and picks up materials scattered in various places. The materials are sucked in from the suction port 101 and drawn into the intermediate chamber 205 of the air-material separation section 2 along the first conveying pipe 106, the second conveying pipe 111, the third conveying pipe 114, the fourth conveying pipe 119, and the main conveying pipe 118; S3, air-material separation; In this step, the materials are separated from the air. After the air-material mixture reaches the intermediate chamber 205, the air is purified by the bag dust collector 204. The purified air is discharged from the exhaust pipe 303 through the exhaust pipe 307 of the Roots blower 302; The materials fall to the bottom of the intermediate chamber 205 and are collected under the combined action of their own gravity and the pulse dust collector 203; S4, material discharge; In this step, the materials collected at the bottom of the intermediate chamber 205 are discharged through the airlock valve 206 and discharged through the reversing valve 207 under the action of their own gravity.

[0035] Preferably, in the material discharge step, the outlet of the reversing valve 207 can be connected to different process flows. The reversing valve 207 can be switched according to process needs to discharge materials to different subsequent processes to meet different actual production needs.

[0036] Preferably, the scope of application of the process includes, but is not limited to, the process flow of the present invention; other similar pneumatic conveying processes and methods are also applicable.

[0037] Demonstration of the working process of this invention: The fourth motor 301 and the third motor 208 are started sequentially on the control box 122. After the vacuum value of the pressure gauge 305 on the air extraction pipe 303 reaches the process requirements, the hydraulic oil pump of the robotic arm, the second motor 127, and the first motor 105 are started sequentially. The position of the suction port 101 is adjusted by operating the robotic arm remote control to suck up materials from different points. After the materials reach the intermediate chamber 205 along each conveying pipe, the air and material are separated in the intermediate chamber 205. The collected materials are discharged through the airlock valve 206 and fall into the designated next process through the reversing valve 207.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suction-type pneumatic conveying system, characterized in that, include: The conveying assembly includes a feeding section (1) and a gas-material separation section (2) connected to the feeding section (1) via a conveying pipe (118). The feeding section (1) is a multi-joint robotic arm equipped with a conveying pipe. The power assembly includes a power unit (3) connected to the intermediate chamber (205) of the gas-material separation section (2) via an air extraction pipe (303). By controlling the movement of the multi-joint robotic arm, the suction port (101) can reach different positions in the material silo for continuous suction. After being sucked in from the suction port (101) of the feeding section (1), the material reaches the gas-material separation section (2) along the conveying pipe (118). After gas-material separation, the material enters the equipment for the next process.

2. The suction-type pneumatic conveying system according to claim 1, characterized in that: The feeding section (1) includes a first end arm (107), a second end arm (110), a third end arm (115), a fourth end arm (120), and a rotary table (124) that are hinged in sequence; a first hydraulic system (108) hinged between the first end arm (107) and the second end arm (110), a second hydraulic system (113) hinged between the second end arm (110) and the third end arm (115), a third hydraulic system (117) hinged between the third end arm (115) and the fourth end arm (120), and a fourth hydraulic system (123) hinged between the fourth end arm (120) and the rotary table (124); and a first hydraulic system fixed to the first end arm (107). A conveying pipe (106), a second conveying pipe (111) fixed on the second end arm (110), a third conveying pipe (114) fixed on the third end arm (115), and a fourth conveying pipe (119) fixed on the fourth end arm (120); a first hose (109) connecting the first conveying pipe (106) and the second conveying pipe (111), a second hose (112) connecting the second conveying pipe (111) and the third conveying pipe (114), a third hose (116) connecting the third conveying pipe (114) and the fourth conveying pipe (119), and a fourth hose (121) connecting the fourth conveying pipe (119) and the main conveying pipe (118).

3. The suction-type pneumatic conveying system according to claim 2, characterized in that: The other end of the first feed pipe (106) is connected to a suction head (104) via a flange; a first motor (105) is fixedly installed on the suction head (104), and a third gear (103) is fixedly connected to the output shaft of the first motor (105); a auger (102) is rotatably installed on the suction head (104) opposite to the position of the first feed pipe (106), and a gear is fixedly sleeved on the outside of the auger (102) to mesh with the third gear (103); the first motor (105) drives the third gear (103) and thus drives the auger (102) to rotate.

4. The suction-type pneumatic conveying system according to claim 3, characterized in that: A rotary table (124) is rotatably mounted on a robotic arm base (126) via a rotating shaft. A second motor (127) is fixedly mounted on the rotary table (124). A second gear (128) is fixedly connected to the output shaft of the second motor (127). A first gear (125) is fixedly mounted on the robotic arm base (126) and meshes with the second gear (128) and is coaxial with the rotating shaft of the rotary table (124). The second motor (127) drives the second gear (128) to drive the rotary table (124) to rotate around the rotating shaft, thereby driving the fourth end arm (120) to rotate, thus realizing the rotation of the entire robotic arm. A control box (122) is mounted on the rotary table (124) and electrically connected to the first motor (105), the second motor (127), the third motor (208), and the fourth motor (301).

5. The suction-type pneumatic conveying system according to claim 4, characterized in that: In the feeding section (1), the front end of the robotic arm is provided with a suction head (104), and a auger (102) driven by a first motor (105) is installed on the suction head (104). The rotation of the auger (102) plays the role of gathering and loosening the material.

6. The suction-type pneumatic conveying system according to claim 5, characterized in that: The gas-material separation unit (2) includes: an intermediate silo (205) connected to a conveying main pipe (118), a bag dust collector (204) installed inside the intermediate silo (205), and a pulse dust collector (203) installed on the top of the intermediate silo (205) and cooperating with the bag dust collector (204); the pulse dust collector (203) is connected to the gas storage tank (201) through an air pipe (202) to achieve the purpose of separating gas and material; the bottom of the intermediate silo (205) is connected to the upper end of the airlock valve (206) and the lower end is connected to the reversing valve (207). The airlock valve (206) is connected to the third motor (208) through a transmission chain and is driven by the third motor (208). By operating the reversing valve (207), the material can be sent to different process flow equipment.

7. The suction-type pneumatic conveying system according to claim 6, characterized in that: The power unit (3) includes: an exhaust pipe (303) connected to the intermediate chamber (205) and a Roots blower (302) connected to the other end of the exhaust pipe (303); a fourth motor (301) is connected to the Roots blower (302) via a V-belt (308) to drive the Roots blower (302) to run, and an exhaust pipe (307) is connected to the exhaust side of the Roots blower (302) to exhaust the air separated by the gas-material separation unit (2).

8. The suction-type pneumatic conveying system according to claim 7, characterized in that: An airlock valve (206) is installed between the intermediate silo (205) and the reversing valve (207) to ensure that the material in the intermediate silo (205) is continuously discharged and that the material is not drawn back in the opposite direction, so as to achieve the purpose of simultaneous and continuous material suction and discharge.

9. A suction-type pneumatic conveying system according to claim 8, characterized in that: In the power unit (3), an electric contact pressure gauge (305) and a regulating valve (306) are installed on the air extraction pipe (303), and the electric contact pressure gauge (305) and the regulating valve (306) are electrically connected. When the vacuum value inside the air extraction pipe (303) reaches the upper limit of the electric contact pressure gauge (305), the electric contact pressure gauge (305) triggers the regulating valve (306) to perform an opening action, and air enters the air extraction pipe (303) through the regulating valve (306), reducing the vacuum value inside the air extraction pipe (303) and the intermediate chamber (205). When the vacuum value inside the air extraction pipe (303) drops to the lower limit of the electric contact pressure gauge (305), the electric contact pressure gauge (305) triggers the regulating valve (306) to perform a closing action, cutting off the air from entering the air extraction pipe (303), increasing the vacuum value inside the air extraction pipe (303) and the intermediate chamber (205), and keeping the vacuum value inside the intermediate chamber (205) within a certain range.

10. A method for suction-type pneumatic conveying, applicable to any one of the suction-type pneumatic conveying systems according to claims 1-9, comprising the following steps: S1. Obtain the vacuum required for material suction; In this step, by starting the fourth motor (301), the Roots blower (302) is driven to run through the V-belt (308), and the air inside the intermediate chamber (205) and the conveying main pipe (118) is extracted, and a certain vacuum is generated in the air-material separation section (2) and the feeding section (1), which provides power for material suction; S2. Suction of materials at each point; In this step, the remote control of the robotic arm is used to control the extension and retraction of the first hydraulic system (108), the second hydraulic system (113), the third hydraulic system (117), and the fourth hydraulic system (123) to adjust the opening and closing angle of the robotic arm. At the same time, the remote control is used to control the second motor (127) to run, driving the rotary table (124) to rotate horizontally, thereby realizing the suction of the robotic arm. The inlet (101) reaches the designated point and picks up the materials scattered in various places. The materials are sucked in from the inlet (101) and sucked into the intermediate chamber (205) of the air-material separation section (2) along the first conveying pipe (106), the second conveying pipe (111), the third conveying pipe (114), the fourth conveying pipe (119), and the main conveying pipe (118); S3, air-material separation; In this step, the materials are separated from the air. After the air-material mixture reaches the intermediate chamber (205), the air is purified by the bag dust collector (204). The purified air is discharged from the exhaust pipe (303) through the exhaust pipe (307) of the Roots blower (302); The materials fall to the bottom of the intermediate chamber (205) and are collected under the combined action of their own gravity and the pulse dust removal device (203). S4. Material discharge: In this step, the material collected at the bottom of the intermediate silo (205) is discharged through the airlock valve (206) and discharged through the reversing valve (207) under its own gravity.

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