Bin two-way guide pipe with buffer structure

Abstract

This invention provides a bidirectional flow guide pipe for silos with a buffer structure, belonging to the technical field of grain storage equipment. The bidirectional flow guide pipe includes a silo body and a flow guide pipe. The flow guide pipe is installed inside the silo body. Rectangular discharge ports are spaced vertically on the flow guide pipe. Annular ventilation pipes are spaced vertically on the outer circumference of the flow guide pipe, and these annular ventilation pipes are staggered with the rectangular discharge ports. Air outlet holes are provided on the outer circumference of the annular ventilation pipes. A group of ventilation holes is spaced vertically inside the flow guide pipe, corresponding to and communicating with the annular ventilation pipes. Through the staggered arrangement of the flow guide blocks and buffer blocks, a periodic variable cross-section flow channel of "contraction-expansion" is formed, increasing the tortuosity of the material's falling path, effectively slowing down the material's falling speed, and avoiding grain damage caused by high-speed impact.

Description

Technical Field

[0001] This invention belongs to the technical field of grain storage equipment, specifically relating to a bidirectional flow guide pipe for silos with a buffer structure. Background Technology

[0002] Grain silos are important storage facilities used for storing bulk grains (such as wheat, corn, rice, and soybeans). During the grain loading process, due to the significant height difference between the grain falling from the top of the silo and the surface, grain particles collide violently with the surface, silo walls, and each other, leading to increased grain breakage and the generation of large amounts of dust. This dust accumulates in the dome area at the top of the silo, and when the concentration reaches the explosive limit (typically 30-50 g / m³), it can cause significant dust buildup. 3 When exposed to open flames or static sparks, dust explosions can easily occur, causing serious casualties and property damage. Furthermore, high-speed falls and collisions can cause grains to naturally separate according to particle size and density, resulting in uneven grain quality within the warehouse and creating difficulties for subsequent processing and quality management.

[0003] Existing diversion pipes only have simple diversion functions. Dust removal and arch breaking are independent systems, which result in high equipment investment, large space occupation, and the inability to achieve coordinated operation of exhaust dust removal and air supply arch breaking in a single device. Summary of the Invention

[0004] The purpose of this invention is to provide a bidirectional flow guide pipe for silos with a buffer structure, which aims to solve the problems of high breakage rate, dust accumulation, severe arching, and single function in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bidirectional guide pipe for a silo with a buffer structure, comprising: a silo body and a guide pipe, the guide pipe being installed inside the silo body, the guide pipe having rectangular discharge ports spaced vertically at intervals, annular ventilation pipes spaced vertically at intervals on the outer circumference of the guide pipe, the annular ventilation pipes and the rectangular discharge ports being staggered vertically, air outlet holes being opened on the outer circumference of the annular ventilation pipes, and a group of ventilation holes spaced vertically at intervals inside the guide pipe, the group of ventilation holes corresponding to the annular ventilation pipes, and the group of ventilation holes communicating with the interior of the annular ventilation pipes; The silo body is equipped with a two-way airflow control device, which is connected to the annular ventilation pipe. When the material is discharged, the two-way airflow control device absorbs the dust inside the silo body and the guide pipe through the air outlet and ventilation hole group on the annular ventilation pipe. When the material is unloaded, the two-way airflow control device introduces gas into the silo body and the guide pipe through the air outlet and ventilation hole group on the annular ventilation pipe, thereby preventing the material from arching.

[0006] As a bidirectional guide pipe for silos with a buffer structure according to the present invention, preferably, a central pipe is installed inside the guide pipe, and the central pipe extends in the vertical direction inside the guide pipe. The guide pipe is equipped with a feeding buffer device at intervals on the upper and lower sides to slow down the speed of material feeding.

[0007] As a silo bidirectional guide pipe with a buffer structure according to the present invention, preferably, the feeding buffer device includes guide blocks arranged at intervals on the central pipe, and the guide blocks are frustum-shaped structures that are narrow at the top and wide at the bottom; The guide tube is equipped with buffer blocks spaced vertically inside. The buffer blocks are funnel-shaped structures that are wider at the top and narrower at the bottom, and the buffer blocks and guide blocks are arranged alternately.

[0008] As a bidirectional guide pipe for silos with a buffer structure according to the present invention, preferably, there is a gap between the guide block and the inner wall of the guide pipe, and a gap between the buffer block and the central pipe.

[0009] As a silo bidirectional airflow guide pipe with a buffer structure according to the present invention, preferably, the bidirectional airflow control device includes a connecting channel installed between two adjacent annular ventilation pipes, the connecting channel being used to connect the two adjacent annular ventilation pipes. An air supply pipe is installed on the topmost annular ventilation pipe. The air supply pipe extends out of the top of the silo body and is connected to a U-shaped ventilation pipe. One end of the U-shaped ventilation pipe is connected to a dust removal fan, and the other end of the U-shaped ventilation pipe is connected to an arch-breaking fan. A three-way valve is installed inside the air supply pipe.

[0010] As a bidirectional guide pipe for a silo with a buffer structure according to the present invention, preferably, an inclined feeding channel is installed inside the silo body, an inlet is opened at the top of the silo body, one end of the feeding channel corresponds to the inlet, and the other end of the feeding channel is connected to the inside of the guide pipe.

[0011] As a bidirectional guide pipe for silos with a buffer structure according to the present invention, preferably, the feeding channel is a rectangular channel structure.

[0012] As a silo bidirectional flow guide pipe with a buffer structure according to the present invention, preferably, the ventilation hole group is a ring array of vent holes arranged inside the flow guide pipe, and the vent holes are connected to the inside of the ring ventilation pipe.

[0013] As a silo bidirectional guide pipe with a buffer structure according to the present invention, preferably, the vent hole and the air outlet hole are both inverted conical circular hole structures.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This type of bidirectional flow pipe for silos with a buffer structure forms a periodic variable cross-section flow channel of "contraction-expansion" through the staggered arrangement of flow guide blocks and buffer blocks. This increases the tortuosity of the material falling path, effectively slows down the falling speed of the material, and avoids grain damage caused by high-speed impact.

[0015] 2. This type of silo bidirectional guide pipe with buffer structure connects the dust removal fan and the arch breaking fan through a U-shaped ventilation pipe, realizing the rapid switching between the two modes of exhaust dust removal and air supply arch breaking. The same set of annular ventilation pipe system takes into account both functions, reducing production costs.

[0016] 3. In the case of a silo bidirectional guide pipe with a buffer structure, in the air supply mode, high-pressure gas enters the inside of the guide pipe through the vent and enters the grain layer between the silo body and the guide pipe through the air outlet, forming a directional airflow that penetrates, breaks up the arching, and promotes flow. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of a specific embodiment of the present invention; Figure 2 This is a side view of a specific embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the internal cross-sectional structure of the silo body in a specific embodiment of the present invention; Figure 6 This is a front view of the guide tube in a specific embodiment of the present invention.

[0018] In the diagram: 1. Silo body; 2. Guide pipe; 21. Rectangular discharge port; 22. Annular ventilation pipe; 23. Air outlet; 3. Ventilation hole group; 31. Air vent; 10. Central pipe; 11. Guide block; 12. Buffer block; 13. Feeding channel; 231. Connecting channel; 24. Air supply pipe; 25. U-shaped ventilation pipe. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-6 The present invention provides the following technical solution: a silo bidirectional guide pipe with a buffer structure, including a silo body 1 and a guide pipe 2 vertically installed inside the silo body 1. The guide pipe 2 is mainly used to guide the material from the top of the silo to the bottom outlet to reduce the lateral pressure of the material on the silo wall.

[0021] On the wall of the guide pipe 2, multiple rectangular discharge ports 21 are spaced apart along the vertical direction. These rectangular discharge ports 21 allow the material in the guide pipe 2 to flow into the annular space between the guide pipe 2 and the silo body 1, realizing multi-point discharge and further balancing the pressure inside the silo.

[0022] On the outer circumferential surface of the guide pipe 2, multiple annular ventilation pipes 22 are also arranged at vertical intervals. These annular ventilation pipes 22 and rectangular discharge ports 21 are arranged vertically in a staggered manner, that is, at least one rectangular discharge port 21 is arranged between two adjacent annular ventilation pipes 22. This layout can avoid mutual interference. Multiple air outlets 23 are opened on the outer circumferential surface of each annular ventilation pipe 22. Correspondingly, on the pipe wall of the guide pipe 2, at the position corresponding to each annular ventilation pipe 22, a ventilation hole group 3 is provided. The ventilation hole group 3 is a ring array of vents 31 arranged inside the guide pipe 2, and these vents 31 connect the internal space of the guide pipe 2 with the internal space of the annular ventilation pipes 22.

[0023] Please see Figure 3-6 Both the vent 31 and the air outlet 23 are designed as inverted conical circular holes, that is, the outer opening is smaller than the inner opening or the outer opening is larger than the inner opening, in order to facilitate the guidance of airflow and prevent material blockage.

[0024] A bidirectional airflow control device is installed on the top of the silo body 1. This device is connected to each annular ventilation pipe 22 and is used to control the intake or exhaust of airflow. The bidirectional airflow control device includes a connecting channel 231, an air supply pipe 24, and a U-shaped ventilation pipe 25. The connecting channel 231 is used to connect adjacent annular ventilation pipes 22, so that all annular ventilation pipes 22 form a connected air path system.

[0025] The uppermost annular ventilation duct 22 is connected to an air supply pipe 24, which extends upwards through the top of the silo body 1. The top of the air supply pipe 24 is connected to a U-shaped ventilation duct 25. The two branches of the U-shaped ventilation duct 25 are connected to a dust removal fan and an arch-breaking fan, respectively.

[0026] Please see Figure 1-3 The key feature is that a three-way valve (not shown in the figure) is installed inside the air supply pipe 24. The three ports of this three-way valve are respectively connected to the air supply pipe 24, the dust removal fan pipe, and the arch-breaking fan pipe. By controlling the operation of the three-way valve, the connection state between the air supply pipe 24 and the dust removal fan or the arch-breaking fan can be precisely switched. The three-way valve is existing technology and will not be described in detail here.

[0027] The dust removal fan is a medium-pressure centrifugal fan with a rated air volume of 2000-5000 m³ / h. 3 / h, rated pressure 1500-2500Pa, used to generate negative pressure during the feeding stage, absorb dust inside the guide pipe 2 through the vent 31, and absorb dust in the annular space between the silo body 1 and the guide pipe 2 through the air outlet 23.

[0028] Please see Figure 1-6 The arch-breaking blower uses a high-pressure blower with a rated air volume of 500-2000 m³ / h. 3 / h, rated pressure 3000-8000Pa, used to generate positive pressure during the unloading stage. High-pressure gas is introduced into the guide pipe 2 through the vent 31 and into the grain layer through the air outlet 23 to form local fluidization and break the arching.

[0029] A central tube 10 is vertically installed at the center of the inner part of the guide tube 2. Multiple guide blocks 11, each with a truncated cone shape (narrower at the top and wider at the bottom), are fixedly arranged at intervals on the central tube 10. Multiple buffer blocks 12, each with a funnel shape (wider at the top and narrower at the bottom), are fixedly arranged at intervals on the inner wall of the guide tube 2. Furthermore, the guide blocks 11 and buffer blocks 12 are arranged in a staggered vertical arrangement.

[0030] A feed inlet is located at the top of the silo body 1, and an inclined feeding channel 13 is installed inside the silo body 1. One end of the feeding channel 13 connects to the feed inlet, and the other end extends into the interior of the guide pipe 2. In this way, the material entering from the feed inlet is guided by the feeding channel 13 and falls directly into the central area of ​​the guide pipe 2, avoiding direct impact of the material on the silo wall and dust generation. The feeding channel 13 has a rectangular channel structure to increase its structural stability and guiding effect.

[0031] Please see Figure 1-6Working principle: During the process of conveying materials into the silo or the natural fall of materials, a large amount of dust is generated. At this time, the air supply pipe 24 is connected to the dust removal fan by switching the three-way valve. The dust removal fan is started, and a negative pressure is formed inside the annular ventilation pipe 22 through the U-shaped ventilation pipe 25, the air supply pipe 24, and the connecting channel 231. This negative pressure absorbs dust in the space between the guide pipe 2 and the silo body 1 through the air outlet 23 on the annular ventilation pipe 22; at the same time, the negative pressure also absorbs dust inside the guide pipe 2 through the vent 31 on the guide pipe 2. The dust is finally sucked into the dust removal fan for treatment by the airflow, achieving efficient dust removal.

[0032] When material flow becomes obstructed or arching occurs during silo unloading, the three-way valve switches the connection between the air supply pipe 24 and the arch-breaking blower. The arch-breaking blower is then activated. The positive pressure airflow generated by the blower flows through the U-shaped ventilation pipe 25, the air supply pipe 24, and the connecting channel 231, entering each annular ventilation pipe 22. Part of the airflow blows directly onto the material near the inner wall of the silo body 1 through the air outlet 23; another part blows onto the material inside the guide pipe 2 through the vent 31. This airflow breaks down the adhesion and friction between material particles, restoring the material to a flowing state, thus effectively breaking the arching and ensuring smooth unloading. The precise switching of the three-way valve allows for rapid response to changes in operating conditions and avoids interference between the two functions.

[0033] When the material falls from the top of the guide pipe 2, it first lands on the upper funnel-shaped buffer block 12, where it is buffered and its flow direction is changed, dispersing in all directions. The dispersed material then lands on the lower frustum-shaped guide block 11, where it is again buffered and guided to the center. This process repeats, with the material falling in an "S" shaped path between the guide block 11 and the buffer block 12, greatly increasing the length and resistance of the falling path and significantly reducing the speed of the material when it reaches the bottom, thus effectively protecting the integrity of the grain particles. To ensure the normal falling of the material, a gap is left between the outer edge of the guide block 11 and the inner wall of the guide pipe 2, and a gap is also left between the inner edge of the buffer block 12 and the outer wall of the central pipe 10.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A silo bi-directional draft tube with a buffer structure, comprising: The silo body and the guide pipe, wherein the guide pipe is installed inside the silo body, are characterized in that... The guide pipe has rectangular discharge ports spaced at intervals at the top and bottom. The outer circumference of the guide pipe has annular ventilation pipes spaced at intervals at the top and bottom. The annular ventilation pipes and rectangular discharge ports are staggered at the top and bottom. The outer circumference of the annular ventilation pipes has air outlet holes. The inside of the guide pipes has ventilation hole groups spaced at intervals at the top and bottom. The ventilation hole groups correspond to the annular ventilation pipes and are connected to the inside of the annular ventilation pipes. The silo body is equipped with a two-way airflow control device, which is connected to the annular ventilation pipe. When the material is discharged, the two-way airflow control device absorbs the dust inside the silo body and the guide pipe through the air outlet and ventilation hole group on the annular ventilation pipe. When the material is unloaded, the two-way airflow control device introduces gas into the silo body and the guide pipe through the air outlet and ventilation hole group on the annular ventilation pipe, thereby preventing the material from arching.

2. The silo bidirectional flow guide pipe with buffer structure according to claim 1, characterized in that: A central tube is installed inside the guide tube, and the central tube extends vertically inside the guide tube. The guide pipe is equipped with a feeding buffer device at intervals on the upper and lower sides to slow down the speed of material feeding.

3. The silo bidirectional flow guide pipe with buffer structure according to claim 2, characterized in that: The feeding buffer device includes guide blocks that are spaced apart on the central tube, and the guide blocks are frustum-shaped structures that are narrower at the top and wider at the bottom. The guide tube is equipped with buffer blocks spaced vertically inside. The buffer blocks are funnel-shaped structures that are wider at the top and narrower at the bottom, and the buffer blocks and guide blocks are arranged alternately.

4. The silo bidirectional flow guide pipe with buffer structure according to claim 3, characterized in that: A gap is left between the flow guide block and the inner wall of the flow guide tube, and a gap is left between the buffer block and the central tube.

5. The silo two-way flow guide pipe with buffer structure according to claim 1, characterized in that: The bidirectional airflow control device includes a connecting channel installed between two adjacent annular ventilation pipes, the connecting channel being used to connect the two adjacent annular ventilation pipes. An air supply pipe is installed on the topmost annular ventilation pipe. The air supply pipe extends out of the top of the silo body and is connected to a U-shaped ventilation pipe. One end of the U-shaped ventilation pipe is connected to a dust removal fan, and the other end of the U-shaped ventilation pipe is connected to an arch-breaking fan. A three-way valve is installed inside the air supply pipe.

6. The silo two-way flow guide pipe with buffer structure according to claim 1, characterized in that: The silo body is equipped with an inclined feeding channel inside, and the top of the silo body is provided with a feeding port. One end of the feeding channel corresponds to the feeding port, and the other end of the feeding channel is connected to the inside of the guide pipe.

7. A silo bi-directional draft tube with a buffer structure according to claim 6, characterized in that: The feeding channel has a rectangular channel structure.

8. The silo two-way flow guide pipe with buffer structure according to claim 1, characterized in that: The ventilation hole group is a ring array of air holes arranged inside the guide pipe, and the air holes are connected to the inside of the ring ventilation pipe.

9. A bidirectional flow guide pipe for a silo with a buffer structure according to claim 8, characterized in that: Both the vent and the air outlet are inverted conical circular holes.

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