A pneumatic conveying device with multi-stage air supplementing capacity
By setting up multi-stage air replenishment components and flat-slit nozzles in the pneumatic conveying device, the problem of blockage caused by pressure attenuation during long-distance conveying is solved, achieving stability and smoothness of the air-powder mixed flow, and ensuring long-distance conveying of powder.
Patent Information
- Application Number
- CN202522573695.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-04
AI Technical Summary
In long-distance, complex pipeline pneumatic conveying processes, the frictional resistance of the pipe wall leads to a decrease in conveying pressure, resulting in a drop in material flow rate and potential problems such as material blockage and pipeline stagnation.
A pneumatic conveying device with multi-stage gas replenishment capability is used. By setting multiple gas replenishment components, connecting pipes of different lengths and solenoid valves, combined with flat slit nozzles and flow guide shells, multi-stage gas replenishment is achieved to ensure the stability and smoothness of the gas-powder mixture.
It effectively improves the stability and smoothness of powder conveying in pipelines, avoids blockage problems caused by insufficient power, and achieves stable long-distance conveying.
Smart Images
Figure CN224942018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic conveying technology, and in particular to a pneumatic conveying device with multi-stage air replenishment capability. Background Technology
[0002] Pneumatic conveying systems are modern conveying equipment that uses airflow to transport powdery, granular, and other bulk materials in pipelines. They are widely used in industries such as chemical, building materials, food, pharmaceutical, and power. Compared with mechanical conveying, they have significant advantages such as closed system design, flexible layout, less environmental pollution, and ease of automation.
[0003] However, regardless of the form of dense phase conveying, a core problem will be faced in the process of conveying over long distances and through complex pipelines: due to the frictional resistance of the pipe wall, the conveying pressure will decrease significantly with the increase of distance, which will lead to a decrease in material flow rate, eventually causing material plugs to stagnate, block the pipeline, and cause conveying failure.
[0004] In order to better address the above problems, promote the development of industry technology, and enhance core competitiveness, this application proposes a new compositional structure that differs from existing technologies. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pneumatic conveying device with multi-stage air replenishment capabilities.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A pneumatic conveying device with multi-stage air replenishment capability includes an air pump, a feed pipe, and a pipeline. The feed pipe and the pipeline are fixed together by a flange. One end of the feed pipe is fixed with a tapered joint, and one end of the tapered joint is connected to and fixed with an air inlet pipe. One end of the air inlet pipe is connected to and fixed with an air guide shell, and the air guide shell is connected to the air outlet of the air pump. Two fixing blocks are fixedly connected to the bottom outer wall of both the feed pipe and the pipeline. Multiple connecting pipes of different lengths are inserted between the multiple fixing blocks, and the connecting pipes are connected and fixed to the air guide shell. Multiple air replenishment components connected to the connecting pipes are provided on the pipeline.
[0007] As a further embodiment of this utility model, the air supply component includes multiple slots arranged in a ring array on the pipe. Each slot is connected to and fixed with a nozzle. The outer wall of the pipe is detachably connected to two flow guide shells by bolts, and the two flow guide shells are detachably connected by bolts. The flow guide shells cover the multiple slots and are connected to the slots. The bottom end of the nozzle passes through the slot and is connected to and fixed with the nozzle. The bottom of the flow guide shell is connected to and fixed with a flow guide pipe, and the flow guide pipe is connected to and fixed with a connecting pipe at the corresponding position at the bottom.
[0008] As a further improvement of this utility model, each of the multiple connecting pipes is fixed with a solenoid valve at one end near the air guide shell.
[0009] As a further embodiment of this utility model, the top of the guide tube is provided with a feed inlet, and the feed inlet is connected to and fixed with a feed tube.
[0010] As a further improvement of this utility model, the nozzle is a flat slit type.
[0011] As a further improvement of this invention, the spray direction of the nozzle is the same as the direction of pneumatic conveying within the pipeline.
[0012] The beneficial effects of this utility model are as follows: 1. By setting up multiple air replenishment components in conjunction with connecting pipes of different lengths and solenoid valves, multi-stage air replenishment is achieved. The corresponding solenoid valve is opened according to the position requirements of the air-powder mixing flow. The gas is sprayed out in the same direction from the flat slit nozzle through the connecting pipe and the guide shell to push the mixing flow, which effectively improves the stability and smoothness of the powder conveying in the pipeline.
[0013] 2. The present invention adopts a flat slit nozzle design, the spray direction of which is consistent with the pneumatic conveying direction in the pipeline. The sprayed gas can further assist the gas-powder mixture to flow forward, thereby enhancing the gas replenishment and propulsion effect.
[0014] 3. In this utility model, a guide shell covers multiple slots on the pipeline and connects with the nozzles, so that the gas is evenly distributed to each nozzle through the guide shell and sprayed out, ensuring uniform gas replenishment and improving the stability of powder conveying.
[0015] 4. An initial high-pressure gas is provided by an air pump to mix with the powder to form an air-powder mixture flow. Combined with multi-stage air replenishment to continuously supplement power, the powder can be stably transported over long distances, avoiding blockage problems caused by insufficient power during the transportation process. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of a pneumatic conveying device with multi-stage air replenishment capability proposed in this utility model. Figure 2 This is a cross-sectional view of the guide pipe structure of a pneumatic conveying device with multi-stage air replenishment capability proposed in this utility model. Figure 3 This is a cross-sectional view of the guide shell structure of a pneumatic conveying device with multi-stage air replenishment capability proposed in this utility model.
[0017] In the diagram: 1. Flange; 2. Flow guide shell; 3. Pipe; 4. Feed pipe; 5. Air inlet pipe; 6. Air guide shell; 7. Air pump; 8. Solenoid valve; 9. Feed pipe; 10. Fixing block; 11. Connecting pipe; 12. Flow guide pipe; 13. Conical joint; 14. Nozzle; 15. Groove. Detailed Implementation
[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.
[0019] Reference Figures 1-3 A pneumatic conveying device with multi-stage air replenishment capability includes an air pump 7, a guide pipe 9, and a pipe 3. The guide pipe 9 and the pipe 3 are fixed together by a flange 1. The top of the guide pipe 9 is provided with a feed inlet, which is connected to a feed pipe 4. The feed pipe 4 is connected to an external feeding device, so that the powder in the feeding device enters the guide pipe 9 through the feed pipe 4. The air-powder mixture is finally output from the outlet end of the pipe 3, completing the initial conveying process of the powder. like Figure 2 As shown, a tapered connector 13 is fixed to one end of the feed pipe 9, an air inlet pipe 5 is fixed to one end of the tapered connector 13, an air guide shell 6 is fixed to one end of the air inlet pipe 5, and the air guide shell 6 is connected to the air outlet of the air pump 7. The air pump 7 causes high-pressure gas to enter the feed pipe 9 through the air guide shell 6 and the air inlet pipe 5 in sequence. The high-pressure gas entering the feed pipe 9 mixes with the powder to form an air-powder mixed flow. As the gas continues to flow in, the air-powder mixed flow gains power in the feed pipe 9 and continues to flow along the pipe 3. The bottom outer walls of the feed pipe 9 and the pipe 3 are both fixed with two fixing blocks 10 by bolts. Multiple connecting pipes 11 of different lengths are inserted between the multiple fixing blocks 10, and one end of each of the multiple connecting pipes 11 is connected and fixed to the air guide shell 6. A solenoid valve 8 is fixed to one end of each of the multiple connecting pipes 11 near the air guide shell 6. The pipeline 3 is equipped with multiple air supply components that are connected to the connecting pipe 11. The air supply components include multiple slots 15, which are arranged in a ring array on the pipeline 3. Each slot 15 is connected to and fixed with a flat slit nozzle 14, which is a one-way valve structure. The outer wall of the pipe 3 is detachably connected to two flow guide shells 2 by bolts, and the two flow guide shells 2 are detachably connected by bolts. The joint of the two flow guide shells 2 and the connection between the flow guide shells 2 and the pipe 3 are sealed by rubber gaskets. The guide shell 2 covers and connects to multiple slots 15. The bottom end of the nozzle 14 passes through the slot 15, and the flat nozzle of the nozzle 14 is located inside the pipe 3. Its spray direction is consistent with the pneumatic conveying direction inside the pipe 3. The airflow diffusion angle is between 15° and 30°, which can effectively reduce eddy current loss and improve air replenishment efficiency. The bottom of the flow guide shell 2 is connected to and fixed with a flow guide pipe 12, and the flow guide pipe 12 is connected to and fixed with the connecting pipe 11 at the corresponding position at the bottom; After the solenoid valve 8 is activated, the gas enters the guide shell 2 through the connecting pipe 11, and then exits from the flat slit nozzle 14 through the slot 15 on the guide shell 2. Since the spray direction of the nozzle 14 is the same as the direction of pneumatic conveying in the pipeline 3, the sprayed gas further promotes the gas-powder mixture to flow forward in the pipeline 3, realizing multi-stage gas replenishment and improving the stability and smoothness of the powder conveying in the pipeline 3.
[0020] In this scheme, multiple pressure sensors, such as J400K series and J120K series, can also be installed in the pipeline 3, and the multiple pressure sensors are electrically connected to multiple solenoid valves 8 one by one. A PLC controller is connected between the air pump 7, the solenoid valve 8, and the air pressure sensor. The PLC controller uses a PID control algorithm to adjust the opening of the solenoid valve in real time based on the feedback from the air pressure sensor. When the pressure is detected to be lower than the set threshold, the controller responds within 50ms and starts the corresponding solenoid valve to ensure timely air replenishment. During the flow of gas and powder in pipeline 3, when the gas-powder mixture passes through each gas replenishment component, if the pressure sensor detects insufficient pressure, the PLC controller can open the corresponding solenoid valve 8 to replenish gas as needed.
[0021] The air pump 7 is fixed to the external support frame via a connecting assembly. The connecting assembly includes a connecting plate, on which the air pump 7 is fixed. The connecting plate has multiple symmetrically distributed connecting holes, which facilitates the use of fixing bolts to connect and fix the connecting plate to the support frame.
[0022] Working principle: When it is necessary to convey powder, Connect the feed pipe 4 to the external feeding equipment so that the powder in the feeding equipment enters the guide pipe 9 through the feed pipe 4; Start the air pump 7. The air pump 7 causes high-pressure gas to enter the feed pipe 9 through the air guide shell 6 and the air inlet pipe 5 in sequence. The high-pressure gas entering the feed pipe 9 mixes with the powder entering from the feed pipe 4 to form an air-powder mixed flow. As gas is continuously introduced, the gas-powder mixture gains power in the feed pipe 9 and continues to flow along the pipe 3. During the flow, since the pipe 3 is equipped with multiple air replenishment components, when the gas-powder mixture passes through the position of each air replenishment component, the corresponding solenoid valve 8 is opened as needed.
[0023] After the solenoid valve 8 is activated, the gas enters the guide shell 2 through the connecting pipe 11, and then exits from the flat slit nozzle 14 through the slot 15 on the guide shell 2. Since the spray direction of the nozzle 14 is the same as the direction of pneumatic conveying in the pipeline 3, the sprayed gas further promotes the gas-powder mixture to flow forward in the pipeline 3, realizing multi-stage gas replenishment and improving the stability and smoothness of the powder conveying in the pipeline 3.
[0024] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A pneumatic conveying device with multi-stage air replenishment capability, comprising an air pump (7), a feed pipe (9), and a pipeline (3), wherein the feed pipe (9) and the pipeline (3) are fixed together by a flange (1), characterized in that, One end of the feed pipe (9) is fixed with a conical connector (13), one end of the conical connector (13) is connected to a fixed air inlet pipe (5), one end of the air inlet pipe (5) is connected to a fixed air guide shell (6), and the air guide shell (6) is connected to the air outlet of the air pump (7). The bottom outer wall of the feed pipe (9) and the pipe (3) are both fixedly connected with two fixing blocks (10). Multiple connecting pipes (11) of different lengths are inserted between multiple fixing blocks (10), and the connecting pipes (11) are connected to the air guide shell (6). Multiple air replenishment components connected to the connecting pipes (11) are provided on the pipe (3).
2. The pneumatic conveying device with multi-stage air replenishment capability according to claim 1, characterized in that, The air supply component includes multiple slots (15), which are arranged in a ring array on the pipe (3). Each slot (15) is connected to a nozzle (14). The outer wall of the pipe (3) is detachably connected to two guide shells (2) by bolts, and the two guide shells (2) are detachably connected by bolts. The guide shells (2) cover the multiple slots (15) and are connected to the slots (15). The bottom end of the nozzle (14) passes through the slot (15) and is connected to the nozzle (14). The bottom of the guide shell (2) is connected to a guide pipe (12), and the guide pipe (12) is connected to the connecting pipe (11) at the corresponding position at the bottom.
3. The pneumatic conveying device with multi-stage air replenishment capability according to claim 1, characterized in that, Each of the multiple connecting pipes (11) has a solenoid valve (8) fixed at one end near the air guide shell (6).
4. A pneumatic conveying device with multi-stage air replenishment capability according to claim 1, characterized in that, The top of the feed pipe (9) is provided with a feed inlet, and the feed inlet is connected to a feed pipe (4).
5. A pneumatic conveying device with multi-stage air replenishment capability according to claim 2, characterized in that, The nozzle (14) is a flat slit type.
6. A pneumatic conveying device with multi-stage air replenishment capability according to claim 5, characterized in that, The spray direction of the nozzle (14) is the same as the direction of pneumatic conveying in the pipe (3).