Gas-solid two-phase flow material conveying device

Abstract

The gas-solid two-phase flow material conveying device comprises a first conveying module, the first conveying module comprises a feeding pipe, a discharging pipe, a vacuum pipe, a pushing gas pipe, a stock bin, connecting blocks and a stop valve, the feeding pipe, the vacuum pipe and the pushing gas pipe are connected with the inlet end of the stock bin through the connecting blocks, and the discharging pipe is connected with the outlet end of the stock bin; and the stop valves are respectively arranged on the feeding pipe, the discharging pipe, the vacuum pipe and the pushing air pipe. According to the gas-solid two-phase flow material conveying device, the problems that an existing gas-solid two-phase flow material conveying device is prone to blockage, and frequent maintenance is needed when parts are damaged are solved, and continuous conveying of gas-solid two-phase flow materials is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of gas-solid two-phase flow material conveying equipment, and specifically relates to a gas-solid two-phase flow material conveying device applied in industries such as chemical engineering, plastics, food, and powder spraying. Background Art

[0002] A gas-solid two-phase flow material conveying device is a device for conveying materials during gas-solid two-phase flow material conveying.

[0003] Chinese Patent Invention No. 202420507010.3 discloses a gas-solid two-phase flow material conveying device. Its main principle is to utilize the characteristic that the pores of the fluidization tube are smaller than the solid gas-solid two-phase flow materials. By setting the suction / discharge ports of the positive and negative pressure module in the gap between the conveying container and the fluidization tube, the pressure inside the conveying fluidization tube is changed. That is, when negative pressure is required in the fluidization tube, the positive and negative pressure module extracts the air inside the fluidization tube through the fluidization tube. At this time, the gas-solid two-phase flow materials are inhaled into the fluidization tube through the powder inlet. Conversely, the positive and negative pressure module injects air into the fluidization tube through the fluidization tube to pressurize, and the gas-solid two-phase flow materials are conveyed out. The problems with this structure are as follows: the pores of the fluidization tube are very small, resulting in large air flow resistance. Whether negative pressure or positive pressure is applied to the fluidization tube, the execution speed is relatively slow, leading to slow powder suction and powder discharge speeds of the conveying device; since the particle size of the gas-solid two-phase flow materials cannot be kept constant, when conveying ultra-fine gas-solid two-phase flow materials (particle size < 10 μm) and / or materials with relatively high viscosity, the micropores of the fluidization tube are extremely easy to be blocked, and the powder suction efficiency decays by ≥ 10% after 100 hours.

[0004] Chinese Patent Invention No. 201210271564.X, previously applied for by the applicant, discloses a gas-solid two-phase flow material conveying device. Its main principle is to utilize the reciprocating movement of the plunger in the conveying cavity to achieve the switching between positive pressure and negative pressure in the conveying cavity. That is, when the powder suction plunger moves upward, the powder suction pipe switch valve opens the powder suction pipe, and the discharge pipe switch valve closes the discharge pipe. The gas-solid two-phase flow materials are inhaled into the conveying cavity from the powder suction pipe; when the powder suction plunger moves downward, the powder suction pipe switch valve closes the powder suction pipe, and the discharge pipe switch valve opens the discharge pipe. The gas-solid two-phase flow materials are discharged from the conveying cavity through the discharge pipe. The problems with this structure are as follows: the movement friction between the plunger and the sealing ring causes the temperature rise ≥ 30 °C, affecting the state of the gas-solid two-phase flow materials and easily causing damage to the sealing ring. The maintenance period of the sealing ring ≤ 1000 hours; since the gas-solid two-phase flow materials inevitably contain a certain amount of humidity, the adhesion rate of the gas-solid two-phase flow materials on the plunger and the inner wall of the bin ≥ 5%. Summary of the Invention

[0005] The purpose of the present invention is to provide a gas-solid two-phase flow material conveying device to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas-solid two-phase flow material conveying device includes a first conveying module. The first conveying module includes a feed pipe, a discharge pipe, a vacuum pipe, a pushing air pipe, a silo, a connecting block, and a stop valve. The feed pipe, the vacuum pipe, and the pushing air pipe are respectively connected to the inlet end of the silo through the connecting block, the discharge pipe is connected to the outlet end of the silo, and the stop valves are respectively arranged on the feed pipe, the discharge pipe, the vacuum pipe, and the pushing air pipe, where:

[0008] The vacuum pipe is connected to an external negative pressure source and can be opened and closed through the stop valve, and is used to form a negative pressure state in the silo;

[0009] The feed pipe is connected to an external gas-solid two-phase flow material discharging mechanism and can be opened and closed through the stop valve, and is used to convey materials into the silo after a negative pressure is formed in the silo;

[0010] The pushing air pipe is connected to an external gas source and can be opened and closed through the stop valve, and is used to form a pressurized state in the silo;

[0011] The discharge pipe is connected to an external material interface and can be opened and closed through the stop valve, and is used to output the gas-solid two-phase flow material in the silo;

[0012] The control process includes step A, step B, and step C. After step A is executed, step B is then executed. After step B is executed, step C is then executed. After step C is executed, step A is then executed to form a cyclic control. The content of step A is: the feed pipe, the pushing air pipe, and the discharge pipe are closed, the vacuum pipe is opened, and a negative pressure is formed in the silo; the content of step B is: the vacuum pipe, the pushing air pipe, and the discharge pipe are closed, the feed pipe is opened, and the gas-solid two-phase flow material enters the silo; the content of step C is: the feed pipe and the vacuum pipe are closed, the pushing air pipe and the discharge pipe are opened, and the gas-solid two-phase flow material in the silo is transferred from the discharge pipe to a specified point outside the silo under the action of the pushing air.

[0013] Another control process includes step A and step B. After step A is executed, step B is then executed. After step B is executed, step A is then executed to form a cyclic control. The content of step A is: the pushing air pipe and the discharge pipe are closed, the feed pipe and the vacuum pipe are opened, and a negative pressure is formed in the silo while the gas-solid two-phase flow material enters the silo; the content of step B is: the feed pipe and the vacuum pipe are closed, the pushing air pipe and the discharge pipe are opened, and the gas-solid two-phase flow material in the silo is transferred from the discharge pipe to a specified point outside the silo under the action of the pushing air.

[0014] With the above structure, the silo can quickly form a negative pressure / positive pressure, the powder suction / discharge speed is fast, and there are no problems such as blockage and temperature rise.

[0015] For a further improvement of the present invention, the negative pressure source is a vacuum generator. The vacuum tube is connected to the vacuum port of the vacuum generator. The air inlet of the vacuum generator is connected to a compressed air source, and the air outlet of the vacuum generator is connected to an external vacuum adsorption recovery device. It can form a negative pressure in the silo and can also timely recover the residual trace gas-solid two-phase flow materials in the silo or the vacuum tube, reducing the color-changing cross-contamination rate between various gas-solid two-phase flow materials to ≤1.0%; the escape rate of the gas-solid two-phase flow materials is ≤1.0%.

[0016] For a further improvement of the present invention, the feed pipe, the discharge pipe, the vacuum tube, and the push air pipe are all flexible hoses, and the stop valve is a rubber tube valve, which completes the opening and closing of the valve through a cylinder actuator; compared with hard pipes and other types of valves, this structure basically does not leave gas-solid two-phase flow materials in the pipe body and the valve body, further reducing the color-changing cross-contamination rate between various gas-solid two-phase flow materials.

[0017] For a further improvement of the present invention, the connecting block includes a silo upper cover, a docking block, a connecting plate, a first sealing ring, a second sealing ring, and a riser pipe. The connecting plate is provided with a plug hole, and the outer cylinder of the silo is inserted into the plug hole. The bottom of the silo upper cover is provided with a push air ring groove, and a cone is arranged at the central position of the push air ring groove. A vacuum hole penetrating the silo upper cover is opened at the central position of the cone, and a pressurizing hole penetrating the silo upper cover is opened outside the vacuum hole. The pressurizing hole is located inside the push air ring groove and outside the cone. The top of the docking block is provided with a round table, and a first circular groove is opened at the bottom of the docking block. A feed hole is opened on the side wall of the docking block. A transfer hole penetrating the first circular groove is opened at the central position of the round table. The riser pipe is arranged in the transfer hole and is connected to the vacuum tube. The feed hole is connected to the transfer hole. The feed port of the silo is fixedly arranged in the first circular groove and is sealed by the second sealing ring. The cone is inserted into the transfer hole of the round table, and the round table is fixedly arranged in the push air ring groove and is sealed by the first sealing ring; the feed pipe is connected to the feed port, the vacuum tube is connected to the vacuum hole, and the push air pipe is connected to the pressurizing hole; with the above structure, when the silo needs to form a negative pressure state, the silo is directly connected to the negative pressure pipe, and the negative pressure is generated quickly. When a positive pressure state is required, the high-pressure gas in the push air pipe first enters the push air ring groove and enters the transfer hole through the gap between the cone and the round table and then enters the silo, with more uniform pressurization. At the same time, it can carry away some of the residual gas-solid two-phase flow materials on the pipe wall, improving the transportation uniformity of the gas-solid two-phase flow materials and reducing the cross-contamination rate of the gas-solid two-phase flow materials.

[0018] The present invention is further improved, the gas-solid two-phase flow material conveying device also includes a second conveying module, the second conveying module has the same structure as the first conveying module, and is symmetrically arranged with the first conveying module, the second conveying module and the first conveying module adopt an intermittent collaborative working mode, and the two operate alternately to achieve the function of continuously conveying materials, that is, the first conveying module outputs gas-solid two-phase flow materials (for 1 to 10 seconds), and the second conveying module simultaneously vacuums and absorbs materials (for 1 to 10 seconds), and when the first conveying module has 0.5 to 2 seconds left to discharge powder, the second conveying module is triggered to start discharging in advance, and the two modules output simultaneously for 0.5 to 2 seconds, the first conveying module switches to suction, and the second conveying module outputs independently until the next cycle; the first conveying module and the second conveying module are switched without interval to ensure the continuity of gas-solid two-phase flow material transportation.

[0019] The present invention is further improved to include a locking cap, through which the connection between the silo and the discharge pipe is achieved.

[0020] The present invention is further improved, and the gas-solid two-phase flow material conveying device also includes a plurality of conveying modules, and the plurality of conveying modules are arranged in parallel.

[0021] If only a single conveying module of the present invention is used, it is suitable for occasions of intermittent gas-solid two-phase flow material conveying.

[0022] The present invention is further improved, the inner cylinder material of the silo includes but is not limited to one-piece injection molding of non-microporous PTFE (polytetrafluoroethylene) or POM (polyoxymethylene) plastic, or PTFE coating on the surface of the metal inner cylinder, the inner wall friction coefficient is ≤1.0, and the gas-solid two-phase flow material adhesion rate is ≤1.0%.

[0023] The present invention is further improved to include a pressure sensor: real-time monitoring of the inventory of gas-solid two-phase flow materials in the silo; a photoelectric sensor: dynamic regulation of the discharge superposition period (0.5-2 seconds); a humidity sensor: detection of the humidity at the inlet of the suction pipe, and an alarm and shutdown when the limit (>15%) is exceeded.

[0024] Compared with the prior art, the present invention solves the following technical problems: 1. Blockage, color change pollution and inefficiency problems, and combined with self-lubricating surface treatment, achieves gas-solid two-phase flow material adhesion rate ≤1.0% and zero blockage risk. 2. Completely eliminate mechanical friction loss, compatible with high-humidity gas-solid two-phase flow materials, make the gas-solid two-phase flow material escape rate ≤1.0%, and reduce damage to the essence of the material. At the same time, in the electrostatic powder spraying industry, it provides efficient and environmentally friendly solutions.

[0025] The gas-solid two-phase flow material conveying device proposed in the present invention solves the problems of easy clogging and component damage requiring regular maintenance in existing gas-solid two-phase flow material conveying devices, and realizes continuous conveying of gas-solid two-phase flow materials. Brief Description of the Drawings

[0026] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a gas-solid two-phase flow material conveying device proposed by the present invention.

[0028] Figure 2 is Figure 1 the front structural schematic diagram of

[0029] Figure 3 is Figure 2 the right-side structural schematic diagram of

[0030] Figure 4 is Figure 3 the sectional structural schematic diagram of A-A in

[0031] Figure 5 is Figure 3 the sectional structural schematic diagram of B-B in

[0032] Figure 6 is Figure 1 the structural schematic diagram after removing some components.

[0033] Figure 7 is Figure 6 the front structural schematic diagram of

[0034] Figure 8 is Figure 7 the sectional structural schematic diagram of C-C in

[0035] Figure 9 is Figure 7 the sectional structural schematic diagram of D-D in

[0036] Figure 10 It is the exploded structural schematic diagram of the connecting block.

[0037] Figure 11 is Figure 10 the structural schematic diagram of the silo upper cover and the docking block in Detailed Embodiments

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] See Figure 1 - 11, a gas-solid two-phase flow material conveying device, including a first conveying module. The first conveying module includes a feed pipe 1, a discharge pipe 2, a vacuum pipe 3, a pushing air pipe 4, a silo 5, a connecting block 6, and a stop valve 7. The feed pipe 1, the vacuum pipe 3, and the pushing air pipe 4 are respectively connected to the inlet end of the silo 5 through the connecting block 6. The discharge pipe 2 is connected to the outlet end of the silo 5. The stop valve 7 is respectively arranged on the feed pipe 1, the discharge pipe 2, the vacuum pipe 3, and the pushing air pipe 4. Among them:

[0040] The vacuum pipe 3 is connected to an external negative pressure source and can be opened and closed through the stop valve 7, and is used to form a negative pressure state in the silo 5;

[0041] The feed pipe 1 is connected to an external gas-solid two-phase flow material discharging mechanism and can be opened and closed through the stop valve 7, and is used to convey materials to the silo 5 after a negative pressure is formed in the silo 5;

[0042] The pushing air pipe 4 is connected to an external gas source and can be opened and closed through the stop valve 7, and is used to form a pressurized state in the silo 5; the discharge pipe 2 is connected to an external material interface and can be opened and closed through the stop valve 7, and is used to output the gas-solid two-phase flow material in the silo 5;

[0043] The control process includes step A, step B, and step C. After step A is executed, step B is then executed. After step B is executed, step C is then executed. After step C is executed, step A is then executed to form a cyclic control. The content of step A is: the feed pipe 1, the pushing air pipe 4, and the discharge pipe 2 are closed, the vacuum pipe 3 is opened, and a negative pressure is formed in the silo 5; the content of step B is: the vacuum pipe 3, the pushing air pipe 4, and the discharge pipe 2 are closed, the feed pipe 1 is opened, and the gas-solid two-phase flow material enters the silo 5; the content of step C is: the feed pipe 1 and the vacuum pipe 3 are closed, the pushing air pipe 4 and the discharge pipe 2 are opened, and the gas-solid two-phase flow material in the silo 5 is transferred from the discharge pipe 2 to a specified point outside the silo 5 under the action of the pushing air.

[0044] Another control process includes step A and step B. After step A is executed, step B is then executed. After step B is executed, step A is then executed to form a cyclic control. The content of step A is: the pushing air pipe 4 and the discharge pipe 2 are closed, the feed pipe 1 and the vacuum pipe 3 are opened, and a negative pressure is formed in the silo 5 while the gas-solid two-phase flow material enters the silo 5; the content of step B is: the feed pipe 1 and the vacuum pipe 3 are closed, the pushing air pipe 4 and the discharge pipe 2 are opened, and the gas-solid two-phase flow material in the silo 5 is transferred from the discharge pipe 2 to a specified point outside the silo 5 under the action of the pushing air.

[0045] With the above structure, the silo 5 can quickly form a negative pressure / positive pressure, and the powder suction / discharge speed is fast. There are basically no problems such as blockage and temperature rise.

[0046] The present invention is further improved. The negative pressure source is a vacuum generator 8. The vacuum tube 3 is connected to the vacuum port 81 of the vacuum generator 8. The air inlet 82 of the vacuum generator 8 is connected to a compressed air source. The air outlet 83 of the vacuum generator 8 is connected to a gas-solid two-phase flow material recovery device, which can not only form a negative pressure in the silo 5, but also timely recover the residual gas-solid two-phase flow materials in the silo 5 or the vacuum tube 3, reducing the cross-color cross-contamination rate between multiple gas-solid two-phase flow materials to ≤1.0%; the gas-solid two-phase flow material dispersion rate ≤1.0%.

[0047] The present invention is further improved. The feed pipe 1, the discharge pipe 2, the vacuum tube 3, and the push air pipe 4 are all flexible hoses. The stop valve 7 is a rubber tube valve, and its opening and closing are completed by a cylinder actuator. Compared with hard pipes and valves inside the pipes, this structure basically does not leave residual gas-solid two-phase flow materials in the pipe body and the valve body, further reducing the cross-color cross-contamination rate between multiple gas-solid two-phase flow materials.

[0048] The present invention is further improved. The connecting block 6 includes a silo upper cover 61, a docking block 62, a connecting plate 63, a first sealing ring 64, a second sealing ring 65, and a riser pipe 66. An insertion hole is opened on the connecting plate 63, and the outer cylinder of the silo 5 is inserted into the insertion hole. A push air ring groove 611 is opened at the bottom of the silo upper cover 61. A frustum 612 is provided at the central position of the push air ring groove 611. A vacuum hole 613 passing through the silo upper cover 61 is opened at the central position of the frustum 612. A pressurizing hole 614 passing through the silo upper cover 61 is opened outside the vacuum hole 613. The pressurizing hole 614 is located inside the push air ring groove 611 and outside the frustum 612. A round table 621 is provided at the top of the docking block 62. A first circular groove 622 is opened at the bottom of the docking block 62. A feed hole 623 is opened on the side wall of the docking block 62. A transfer hole 624 passing through the first circular groove 622 is opened at the central position of the round table 621. The riser pipe 66 is arranged in the transfer hole 624 and is connected to the vacuum tube 3. The feed hole 623 is connected to the transfer hole 624. The feed port of the silo 5 is fixedly arranged in the first circular groove 622 and is sealed by the second sealing ring 65. The frustum 612 is inserted into the transfer hole 624 of the round table 621. The round table 621 is fixedly arranged in the push air ring groove 611 and is sealed by the first sealing ring 64. The feed pipe is connected to the feed port, the vacuum tube 3 is connected to the vacuum hole 613, and the push air pipe 4 is connected to the pressurizing hole 614. With the above structure, when the silo 5 needs to form a negative pressure state, the silo 5 is directly connected to the negative pressure pipe, and the negative pressure is generated quickly. When a positive pressure state is required, the high-pressure gas in the push air pipe 4 first enters the push air ring groove 611 and enters the transfer hole 624 and then enters the silo 5 through the gap between the frustum 612 and the round table 621. The pressurization is more uniform. At the same time, it can take away some of the residual gas-solid two-phase flow materials on the pipe wall, improve the uniformity of gas-solid two-phase flow material transportation, and reduce the cross-contamination rate of gas-solid two-phase flow materials.

[0049] The present invention is further improved and further includes a locking cap, through which the connection between the discharge pipe and the external material interface is realized.

[0050] The present invention is further improved. The gas-solid two-phase flow material conveying device further includes a second conveying module. The second conveying module has the same structure as the first conveying module and is arranged symmetrically with the first conveying module. The second conveying module and the first conveying module adopt an intermittent collaborative working mode, and the two operate alternately to achieve the function of continuous material conveying, that is, the first conveying module outputs gas-solid two-phase flow material (for 3 seconds), and the second conveying module synchronously evacuates and sucks powder (for 3 seconds). When there is 0.5 - 2.0 seconds left for the first conveying module to discharge powder, the second conveying module is triggered to start discharging powder in advance, and the two modules output simultaneously for 0.5 - 2.0 seconds. Then the first conveying module switches to powder sucking, and the second conveying module independently outputs until the next cycle; realizing seamless switching of the work of the first conveying module and the second conveying module to ensure continuous gas-solid two-phase flow material conveying.

[0051] The present invention is further improved. The gas-solid two-phase flow material conveying device further includes a plurality of conveying modules, and the plurality of conveying modules are arranged in parallel.

[0052] The inner cylinder of the silo 5 of the present invention includes, but is not limited to, being integrally injection molded with PTFE (polytetrafluoroethylene) or POM (polyoxymethylene) plastic, or a metal inner cylinder with a PTFE coating on the surface, and the inner wall friction coefficient ≤ 1.0, realizing that the adhesion rate of gas-solid two-phase flow material ≤ 1.0%.

[0053] The present invention is further improved and further includes a pressure sensor (not shown in the figure) for real-time monitoring of the gas-solid two-phase flow material inventory in the inner cylinder of the silo 5; a photoelectric sensor (not shown in the figure): dynamically regulating the duration of the powder discharging superposition period (0.5 - 2.0 seconds); a humidity sensor (not shown in the figure): detecting the humidity at the inlet of the powder sucking pipe and alarming and stopping the machine when the limit is exceeded (> 15%).

[0054] Compared with the prior art, the present invention solves the following technical problems: 1. The problems of blockage, color change pollution and inefficiency, and combined with self-lubricating surface treatment, realizing that the adhesion rate of gas-solid two-phase flow material ≤ 1.0% and zero blockage risk. 2. Completely eliminating mechanical friction loss, being compatible with high-humidity gas-solid two-phase flow materials, making the dispersion rate of gas-solid two-phase flow materials ≤ 1.0%, reducing the damage to the nature of the materials. At the same time, in the electrostatic powder spraying industry, providing an efficient and environmentally friendly solution.

[0055] A gas-solid two-phase flow material conveying device proposed by the present invention solves the problems of easy blockage and frequent maintenance required for component damage in the existing gas-solid two-phase flow material conveying device, and realizes continuous conveying of gas-solid two-phase flow materials.

[0056] It should be noted that fasteners such as bolts and screws, joints for connecting pipes, conventional seals, etc., cylinders of globe valves, pinch valves, etc. involved in this patent belong to conventional components, and conventional carriers such as frames, etc. For the sake of clear and concise description of the patent content, no special description will be given in this text.

[0057] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-solid two-phase flow material conveying device, comprising a first conveying module, characterized in that: The first conveying module includes a feed pipe, a discharge pipe, a vacuum pipe, a push air pipe, a silo, a connecting block, and a stop valve. The feed pipe, the vacuum pipe, and the push air pipe are respectively connected to the inlet end of the silo through the connecting block. The discharge pipe is connected to the outlet end of the silo. The stop valves are respectively arranged on the feed pipe, the discharge pipe, the vacuum pipe, and the push air pipe. Among them: The vacuum pipe is connected to an external negative pressure source and can be opened and closed through the stop valve, and is used to form a negative pressure state in the silo; The feed pipe is connected to an external discharging mechanism and can be opened and closed through the stop valve, and is used to convey materials to the silo after a negative pressure is formed in the silo; The push air pipe is connected to an external air source and can be opened and closed through the stop valve, and is used to form a pressurized state in the silo; The discharge pipe is connected to an external material interface and can be opened and closed through the stop valve, and is used to output the gas-solid two-phase flow material in the silo.

2. The pneumatic-solid two-phase flow material conveying device according to claim 1, characterized in that: The connecting block includes a silo upper cover, a docking block, a connecting plate, a first sealing ring, and a second sealing ring. An insertion hole is opened on the connecting plate, and the outer cylinder of the silo is inserted into the insertion hole. A push air ring groove is opened at the bottom of the silo upper cover. A cone is arranged at the central position of the push air ring groove. A vacuum hole penetrating the silo upper cover is opened at the central position of the cone. A pressurizing hole penetrating the silo upper cover is opened outside the vacuum hole. The pressurizing hole is located inside the push air ring groove and outside the cone. A round table is arranged at the top of the docking block. A first circular groove is opened at the bottom of the docking block. A feed hole is opened on the side wall of the docking block. A transfer hole penetrating the first circular groove is opened at the central position of the round table. The feed hole is communicated with the transfer hole. The feed port of the silo is fixedly arranged in the first circular groove and sealed through the second sealing ring. The cone is inserted into the transfer hole of the round table. The round table is fixedly arranged in the push air ring groove and sealed through the first sealing ring; the feed pipe is communicated with the feed port, the vacuum pipe is communicated with the vacuum hole, and the push air pipe is communicated with the pressurizing hole.

3. The pneumatic-solid two-phase flow material conveying device according to claim 1, wherein: The gas-solid two-phase flow material conveying device further includes a second conveying module. The second conveying module has the same structure as the first conveying module and is arranged symmetrically with the first conveying module. The second conveying module and the first conveying module adopt an intermittent cooperative working mode, and the two operate alternately to achieve the function of continuously conveying materials.

4. A gas-solid two-phase flow material conveying device according to claim 1, characterized in that: The gas-solid two-phase flow material conveying device further includes a plurality of conveying modules, and the plurality of conveying modules are arranged in parallel.

5. A gas-solid two-phase flow material conveying device according to claim 1, characterized in that: The control process includes step A, step B, and step C. After step A is executed, step B is then executed. After step B is executed, step C is then executed. After step C is executed, step A is then executed to form a cyclic control. The content of step A is: the feed pipe, the push air pipe, and the discharge pipe are closed, the vacuum pipe is opened, and a negative pressure is formed in the silo; the content of step B is: the vacuum pipe, the push air pipe, and the discharge pipe are closed, the feed pipe is opened, and the gas-solid two-phase flow material enters the silo; the content of step C is: the feed pipe and the vacuum pipe are closed, the push air pipe and the discharge pipe are opened, and the gas-solid two-phase flow material in the silo is transferred from the discharge pipe to a specified point outside the silo under the action of the push air.

6. A gas-solid two-phase flow material conveying device according to claim 1, characterized in that: The control flow includes step A and step B. After step A is executed, step B is then executed. After step B is executed, step A is then executed, forming a loop control. The content of step A is: Push the air pipe and the discharge pipe to close, open the feed pipe and the vacuum pipe. While a negative pressure is formed in the silo, the gas-solid two-phase flow material enters the silo. The content of step B is: Close the feed pipe and the vacuum pipe, open the push air pipe and the discharge pipe. The gas-solid two-phase flow material in the silo is transferred to a designated point outside the silo under the action of the push air.

7. A gas-solid two-phase flow material conveying device according to claim 1, characterized in that: The negative pressure source is a vacuum generator. The vacuum pipe is connected to the vacuum port of the vacuum generator. The air inlet of the vacuum generator is connected to a compressed air source, and the air outlet of the vacuum generator is connected to a gas-solid two-phase flow material recovery device.

8. A gas-solid two-phase flow material conveying device according to claim 1, characterized in that: The feed pipe, the discharge pipe, the vacuum pipe, and the push air pipe are all flexible hoses. The stop valve is a hose valve, and its opening and closing are completed by a cylinder actuator.

9. The pneumatic solid two-phase flow material conveying device according to claim 1, wherein: It also includes a locking cap, and the connection between the silo and the discharge pipe is achieved through the locking cap.

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