A new type of pneumatic conveying device

Abstract

The present invention relates to the technical field of pneumatic conveying equipment, and specifically to a novel pneumatic conveying device, comprising: a Roots blower, a material conveying pipeline connected to an air outlet of the Roots blower, a feeding mechanism for uniformly feeding material sequentially arranged along the laying direction of the pipeline, a dredging mechanism for dredging the pipeline when blocked, and a collection bin for collecting materials; the novel pneumatic conveying device of the present invention effectively prevents the material from forming agglomerates and clogging in the lower hopper due to moisture regain by providing a drying mechanism, and at the same time drives the scraper rod to perform synchronous axial reciprocating movement along the side wall of the drying chamber, thereby realizing dynamic scraping and sweeping operation of the transition area between the drying chamber and the material conveying pipeline, effectively suppressing the adhesion and accumulation of materials at the structural connection, thereby avoiding blockage of the conveying channel due to material deposition.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic conveying equipment, and in particular to a novel pneumatic conveying device. Background Art

[0002] A pneumatic conveying device is a device that uses airflow energy to transport granular or powdered materials along the direction of airflow in a closed pipe.

[0003] Patent application number CN202310844922.X discloses a pneumatic conveying equipment, including a discharge barrel, a first material conveying pipeline, a drying bin and a second material conveying pipeline. The present invention belongs to the field of pneumatic conveying technology. The silicone rubber elastomer inside the curved pipe section, after colliding with the material, uses its own elasticity to eject the material, thereby reducing the kinetic energy loss of the material. At the same time, when the curved pipe section is blocked, the pipeline is heated, the inner diameter of the pipeline is expanded, and the flow space of the material is increased. The silicone rubber elastomer expands due to heat, squeezes the material, destroys the stable structure of the accumulated material, and is conducive to pipeline unblocking.

[0004] This patent dries the powder during transportation to ensure that the powder remains dry in the pipeline, preventing the powder from clumping and sticking to the inner wall of the pipeline, causing material blockage. However, this patent heats the pipe wall and dries the powder as it passes through the heating section. The powder exists for a short time and the drying effect is poor.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a novel pneumatic conveying device that can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0008] A novel pneumatic conveying device comprises: a Roots blower, a material conveying pipeline connected to the air outlet of the Roots blower, a feeding mechanism for uniformly feeding material along the laying direction of the pipeline, a dredging mechanism for dredging the pipeline when blocked, and a collection bin for collecting materials;

[0009] The feeding mechanism includes: a lower hopper, a drying chamber connected to the lower hopper, a star-shaped feeding shaft rotatably installed between the drying chamber and the lower hopper, a driving motor that drives the star-shaped feeding shaft to rotate, and an air delivery port fixedly installed in the drying chamber; the drying chamber is connected to the feeding pipeline; and the air delivery port is connected to an external air pump.

[0010] Furthermore, the drying chamber is also provided with a scraping assembly;

[0011] The scraper assembly includes: a scraper slidably mounted on the inside of the drying chamber, a driving disk that drives the scraper to move up and down, and a reset spring that drives the scraper to return to its original position; the driving disk is coaxially fixedly connected to the star-shaped feeding shaft; the driving disk is provided with multiple protrusions; the scraper abuts against the driving disk through an abutment rod.

[0012] Furthermore, a limiting sleeve is provided on the side wall of the drying chamber, and the limiting sleeve radially constrains the abutting rod.

[0013] Furthermore, the dredging mechanism includes: a booster pump, a poking rod, a piston plate, and a dredging chamber; the dredging chamber is fixedly installed at the bend of the material delivery pipeline; the dredging chamber is connected to the material delivery pipeline; the piston plate is slidably installed in the dredging chamber; the poking rod is fixedly installed on the piston plate; an opening matching the poking rod is provided on the dredging chamber; the air outlet of the booster pump is connected to the dredging chamber.

[0014] Furthermore, a sealing gasket is provided on the opening.

[0015] Furthermore, it also includes: a vibration component that drives the poking rod to vibrate;

[0016] The vibration assembly includes: a mounting ring fixedly mounted on the poking rod, a knocking block elastically mounted on the mounting ring, a raised groove opened on the inner wall of the dredging cavity, and the knocking block slidably mounted in the raised groove.

[0017] Furthermore, the poking rod is provided with multiple sections of feed ports, the inside of the poking rod is hollow, the poking rod is connected to the material taking cavity through a hose, and the hose is provided with a switch valve.

[0018] Furthermore, an air outlet is provided on one side of the dredging cavity; the air outlet is communicated with the material conveying pipeline; and a one-way valve is provided at the air outlet.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A new type of pneumatic conveying device of the present invention effectively prevents the material from forming lumps and clogging due to moisture regain in the lower hopper by setting a drying mechanism, and at the same time drives the scraper rod to perform synchronous axial reciprocating movement along the side wall of the drying chamber, thereby realizing dynamic scraping and sweeping operations in the transition area between the drying chamber and the material conveying pipeline, effectively suppressing the adhesion and accumulation of materials at the structural connection, thereby avoiding blockage of the conveying channel due to material deposition.

[0021] A novel pneumatic conveying device of the present invention is provided with a dredging mechanism. On the one hand, a booster pump drives the poking rod to be ejected axially, and mechanical thrust is used to destroy the static equilibrium structure of the material accumulated at the bend. Combined with the vibration auxiliary mechanism, the shearing and stripping efficiency of high-viscosity materials is enhanced to achieve effective dredging of powder materials in the bend section. On the other hand, the synchronously started fixed-point sampling module collects the powder materials retained at the bend in situ during the dredging operation through the negative pressure coupling effect of the hollow poking rod and the material collection cavity. Through laboratory physical and chemical analysis, key parameters such as material moisture and particle size distribution can be accurately identified, providing data support for process parameter optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0023] Figure 1 This is a structural schematic diagram of a novel pneumatic conveying device of the present invention;

[0024] Figure 2 This is a front view of a novel pneumatic conveying device of the present invention;

[0025] Figure 3 It is a structural diagram of the feeding mechanism in the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the structure of part A;

[0027] Figure 5 It is a structural schematic diagram of the scraper assembly of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the dredging mechanism in the present invention;

[0029] Figure 7 It is a cross-sectional view of the dredging mechanism in the present invention;

[0030] Figure 8 It is a structural schematic diagram of the vibration component in the present invention.

[0031] In the figure: 1. Roots blower; 2. Feeding pipeline; 3. Feeding mechanism; 4. Dredging mechanism; 5. Collecting bin; 31. Lower hopper; 32. Drying chamber; 33. Star-shaped feeding shaft; 34. Driving motor; 35. Air outlet; 36. Scraper assembly; 361. Scraper; 362. Driving disc; 363. Return spring; 3631. Multi-section protrusion; 364. Abutting rod; 365. Limiting sleeve; 41. Booster pump; 42. Poking rod; 43. Piston plate; 44. Dredging chamber; 451. Mounting ring; 452. Knocking block; 453. Protruding groove; 421. Feed inlet; 422. Hose; 423. Material extraction chamber; 424. Switch valve; 425. Air outlet. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0033] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] like Figures 1 to 8 As shown, the present invention provides a novel pneumatic conveying device, comprising: a Roots blower 1, a material conveying pipe 2 connected to an air outlet 425 of the Roots blower 1, a feeding mechanism 3 provided sequentially along the laying direction of the pipe to uniformly feed the material, a dredging mechanism 4 for dredging the pipe when blocked, and a collection bin 5 for collecting the material;

[0035] The feeding mechanism 3 includes: a lower hopper 31, a drying chamber 32 connected to the lower hopper 31, a star-shaped feeding shaft 33 rotatably mounted between the drying chamber 32 and the lower hopper 31, a driving motor 34 for driving the star-shaped feeding shaft 33, and an air delivery port 35 fixedly mounted in the drying chamber 32; the drying chamber 32 is connected to the material delivery pipeline 2, and the air delivery port 35 is connected to an external air pump;

[0036] When material needs to be conveyed, the drive motor 34 activates, rotating the star-shaped feed shaft 33. The rotation of the star-shaped feed shaft 33 ensures that material within the upper hopper is delivered uniformly to the drying chamber 32. As the material freely falls within the drying chamber 32 due to the rotation of the star-shaped feed shaft 33, an air pump injects hot air into the drying chamber 32 through a pre-set air inlet 35. To ensure efficient hot air delivery, a heater can be installed in the connecting pipe between the air pump and the air inlet 35 to ensure that the air delivered to the drying chamber 32 is hot.

[0037] After entering the drying chamber 32, the hot air zigzags back and forth along the inner walls of the drying chamber 32, forming a disordered yet highly efficient vortex airflow. This vortex airflow not only disperses the powdered material that has fallen into the drying chamber 32 but also dries it simultaneously. This design effectively prevents the material from clumping and clogging within the lower hopper 31 due to moisture resorption, particularly along the sidewalls and bends of the conveying pipe 2, significantly improving material fluidity.

[0038] The hot air blown into the drying chamber 32 mixes with the material that has just fallen into the drying chamber 32 and then flows together into the feed pipe 2 to complete the unloading process. It is worth noting that the pressure of the hot air blown into the drying chamber 32 by the air pump is much lower than that of the Roots blower 1. According to Bernoulli's principle, fluids flow from high-pressure areas to low-pressure areas due to pressure differences. Therefore, in this device, the hot air with lower pressure in the drying chamber 32 will flow and converge in the direction of relatively higher pressure in the feed pipe 2, thereby forming an effective material conveying force and ensuring that the dried material can be smoothly transported through the feed pipe 2.

[0039] Given that the air delivered to the pipeline system in the drying chamber 32 is a high-temperature hot air flow, while the air naturally circulates or is maintained in the feed pipe 2 as a low-temperature cold air flow, the humidity migration effect caused by the temperature gradient is significantly enhanced in the interface area where the hot air flow and the cold air flow meet. Specifically, the water vapor partial pressure carried by the high-temperature hot air flow is higher than that in the low-temperature cold air flow area. At the interface where the two air flows meet, water vapor will spontaneously diffuse from the high-temperature and high-humidity area to the low-temperature and low-humidity area and condense, causing a sudden increase in the local humidity in the interactive area. This change in humidity conditions greatly increases the hygroscopicity of the material, making it easy for the material to adhere at the intersection interface and gradually accumulate on the inner wall surface of the connection part, thereby significantly hindering the smooth unloading process of the material.

[0040] The drying chamber 32 is further provided with a scraper assembly 36;

[0041] The scraper assembly 36 includes: a scraper 361 slidably mounted inside the drying chamber 32, a drive disc 362 that drives the scraper 361 to move up and down, and a return spring 363 that drives the scraper 361 to return to its original position; the drive disc 362 is coaxially fixedly connected to the star-shaped feed shaft 33; the drive disc 362 is provided with multiple protrusions 3631; the scraper 361 abuts against the drive disc 362 via an abutment rod 364;

[0042] During the operation of the drive motor 34, its power output shaft synchronously drives the star-shaped feed shaft 33 and the drive disc 362 to rotate in coordination (for specific structural configuration, please refer to Figure 5 (See the mechanical schematic diagram shown). The surface of the drive disc 362 is designed with cam structural features. During rotation, its cam surface forms periodic contact with the end of the abutment rod 364. The geometric constraints of the cam profile convert the rotational motion into linear reciprocating motion of the abutment rod 364. Based on the principle of mechanical transmission continuity, the scraper rod assembly rigidly connected to the abutment rod 364 performs synchronous axial reciprocating movement along the sidewall of the drying chamber 32, achieving dynamic scraping and sweeping of the transition area between the drying chamber 32 and the conveying pipeline 2. This effectively prevents material adhesion and accumulation at the structural interface, thereby preventing blockage of the conveying channel due to material deposition.

[0043] To ensure the mechanical system's motion accuracy and stability, a limiting sleeve 365 is installed on the sidewall of the drying chamber 32. This sleeve 365 radially constrains the abutment rod 364, ensuring its motion trajectory meets design requirements. In the mechanical energy transmission path, a return spring 363 is installed between the abutment rod 364 and the limiting sleeve 365 in an elastically preloaded manner. This spring's energy storage characteristics provide continuous contact pressure compensation, ensuring that the end of the abutment rod 364 maintains effective contact with the cam surface of the drive disc 362, thereby establishing a stable mechanical drive closed loop. This anti-blocking mechanism, through the synergistic effect of cam transmission and elastic preload, achieves proactive prevention and dynamic removal of material adhesion issues.

[0044] The dredging mechanism 4 includes: a booster pump 41, a poking rod 42, a piston plate 43, and a dredging chamber 44; the dredging chamber 44 is fixedly installed at the bend of the material delivery pipeline 2; the dredging chamber 44 is communicated with the material delivery pipeline 2; the piston plate 43 is slidably installed in the dredging chamber 44; the poking rod 42 is fixedly installed on the piston plate 43; an opening matching the poking rod 42 is opened on the dredging chamber 44; the air outlet 425 of the booster pump 41 is communicated with the dredging chamber 44.

[0045] A sealing gasket is provided on the opening to ensure that when the material is transported in the pipeline, the material will not enter the dredging cavity 44 through the opening on the transport cavity.

[0046] When powder material becomes clogged at a bend in the feed pipe 2, the operator manually activates the booster pump 41. Once activated, the booster pump 41 delivers a pressurized gaseous medium into the connected dredging chamber 44. As the gas continues to flow, the pressure within the dredging chamber 44 gradually increases. This pressure differential pushes the piston plate 43 in a predetermined direction toward the feed pipe 2.

[0047] A poke rod 42 is fixedly mounted on the piston plate 43. When the piston plate 43 moves, the poke rod 42 is precisely inserted into the feed pipe 2 through the pre-set opening. The insertion of the poke rod 42 applies external force to the material accumulated at the bend of the feed pipe 2, effectively destroying the stable structure formed by the material accumulation, thereby achieving the purpose of clearing the feed pipe 2 and eliminating the blockage.

[0048] Also included: a vibration assembly for driving the poking rod 42 to vibrate;

[0049] The vibration assembly includes: a mounting ring 451 fixedly mounted on the poking rod 42, a knocking block 452 elastically mounted on the mounting ring 451, and a protruding groove 453 formed on the inner wall of the dredging cavity 44, wherein the knocking block 452 is slidably mounted in the protruding groove 453;

[0050] As the booster pump 41 drives the prying rod 42 to move axially along the dredging chamber 44, the striking block 452 mounted on the prying rod 42 moves regularly along the undulating path of the pre-set wave grooves on the inner wall of the dredging chamber 44, continuously striking the inner wall of the dredging chamber 44. This impact induces mechanical vibration in the dredging chamber 44, and this vibration energy is effectively transmitted to the bend of the conveying pipe 2 through the structural coupling effect. The energy dissipation of the vibration wave destroys the internal stable structure of the accumulated material, while enhancing the shearing and exfoliation efficiency of the prying rod 42 on sticky materials.

[0051] The poking rod 42 is provided with multiple sections of feed ports 421, and the inside of the poking rod 42 is hollow. The poking rod 42 is connected to the material taking cavity 423 through a hose 422, and the hose 422 is provided with a switch valve 424;

[0052] When powder material becomes clogged at the bend of the feed pipe 2, the booster pump 41 starts to push the prying rod 42 along the dredging cavity 44, and at this time, the on-off valve 424 on the hose 422 is opened. As the prying rod 42 performs the dredging operation to loosen the material at the bend, the positive pressure environment maintained in the feed pipe 2 pressurizes some of the loose powder material into the hollow prying rod 42 through the feed inlet 421, and then transports it to the material collection cavity 423 through the hose 422 to complete the fixed-point sampling.

[0053] Staff can analyze the physical and chemical properties of the sampled powder to accurately diagnose the cause of the blockage: if the test results show that the moisture content of the powder exceeds the process standard, the drying process parameters will be optimized to reduce the moisture content of the material; if blockage still occurs under normal moisture content conditions, the system's unblocking capacity will be improved by adjusting the output pressure parameters of the booster pump 41.

[0054] Based on the above structure, when powder is congested in the bend area of the pipeline, on the one hand, the booster pump 41 drives the poking rod 42 to be pushed out axially, and the mechanical thrust is used to destroy the static equilibrium structure of the accumulated material at the bend. Combined with the vibration auxiliary mechanism, the shearing and stripping efficiency of high-viscosity materials is enhanced to achieve effective dredging of the powder in the bend section; on the other hand, the synchronously started fixed-point sampling module uses the negative pressure coupling effect of the hollow poking rod 42 and the material collection cavity 423 to collect the powder retained at the bend in situ during the dredging operation. Through laboratory physical and chemical analysis, key parameters such as material moisture and particle size distribution can be accurately identified, providing data support for process parameter optimization.

[0055] It should be added here that the feed ports 421 are arranged in plurality along the poking rod 42, so that when poking into the bend, powder materials at different positions can be sucked in, and the detection is more comprehensive; at the same time, when the vibration component vibrates the bend, its vibration will also be transmitted to the poking rod 42, so that on the one hand, the vibration of the poking rod 42 can better destroy the stable structure of the accumulated materials, and on the other hand, the vibration of the powder entering the poking rod 42 can make it better sucked into the material taking cavity 423 to prevent it from being blocked at the feed port 421.

[0056] An air outlet 425 is provided on one side of the dredging cavity 44; the air outlet 425 is connected to the material delivery pipeline 2; a one-way valve is provided at the air outlet 425;

[0057] When the poking rod 42 moves along the dredging chamber 44 to the end of the stroke, the piston plate 43 moves to the upper end of the air outlet 425, and the air in the dredging chamber 44 is filled into the feeding pipe 2 through the air outlet 425, increasing the conveying air pressure, thereby driving the powder to continue to be conveyed from the elbow, thereby accelerating the dredging efficiency of the powder.

[0058] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0059] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A new type of pneumatic conveying device, characterized in that: include: Roots blower, a material delivery pipeline connected to the air outlet of the Roots blower, a feeding mechanism for evenly feeding material along the laying direction of the pipeline, a dredging mechanism for clearing the pipeline when blocked, and a collection bin for collecting materials; The feeding mechanism includes: a lower hopper, a drying chamber connected to the lower hopper, a star-shaped feeding shaft rotatably installed between the drying chamber and the lower hopper, a driving motor that drives the star-shaped feeding shaft to rotate, and an air delivery port fixedly installed in the drying chamber; the drying chamber is connected to the feeding pipeline; and the air delivery port is connected to an external air pump. The dredging mechanism includes: a booster pump, a poking rod, a piston plate, and a dredging chamber; the dredging chamber is fixedly installed at the bend of the material delivery pipeline; the dredging chamber is communicated with the material delivery pipeline; the piston plate is slidably installed in the dredging chamber; the poking rod is fixedly installed on the piston plate; the dredging chamber is provided with an opening matching the poking rod; the air outlet of the booster pump is communicated with the dredging chamber; A vibration component that drives the poking rod to vibrate; The vibration assembly includes: a mounting ring fixedly mounted on the poking rod, a knocking block elastically mounted on the mounting ring, a raised groove opened on the inner wall of the dredging cavity, and the knocking block slidably mounted in the raised groove.

2. A novel pneumatic conveying device as claimed in claim 1, characterized in that: The drying chamber is also provided with a scraping assembly; The scraper assembly includes: a scraper slidably mounted on the inside of the drying chamber, a driving disk that drives the scraper to move up and down, and a reset spring that drives the scraper to reset; the driving disk is coaxially fixedly connected to the star-shaped feeding shaft; the driving disk is provided with multiple protrusions; the scraper abuts against the driving disk through an abutment rod.

3. A novel pneumatic conveying device as claimed in claim 2, characterized in that: The side wall of the drying chamber is provided with a limiting sleeve, which radially constrains the abutting rod.

4. A novel pneumatic conveying device as claimed in claim 3, characterized in that: A sealing gasket is provided on the opening.

5. A novel pneumatic conveying device as claimed in claim 1, characterized in that: The poking rod is provided with multiple sections of feeding ports, the inside of the poking rod is hollow, the poking rod is connected with the material taking cavity through a hose, and the hose is provided with a switch valve.

6. A novel pneumatic conveying device as claimed in claim 5, characterized in that: An air outlet is provided on one side of the dredging cavity; the air outlet is communicated with the material conveying pipeline; and a one-way valve is provided at the air outlet.

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