Novel pneumatic conveying device

Abstract

The invention relates to the technical field of pneumatic conveying equipment, in particular to a novel pneumatic conveying device which comprises a Roots blower, a conveying pipeline communicated with an air outlet of the Roots blower, a feeding mechanism for uniformly feeding, a dredging mechanism for dredging the pipeline when the pipeline is blocked, and a collecting bin for collecting materials, according to the novel pneumatic conveying device, by arranging the drying mechanism, the blocking and clogging phenomenon caused by moisture regaining of materials in the discharging hopper is effectively prevented, meanwhile, the scraping rod is driven to do synchronous axial reciprocating displacement along the side wall of the drying cavity, and dynamic scraping and sweeping operation on the transition area of the drying cavity and the conveying pipeline is achieved; and the adhesion and accumulation phenomenon of the materials at the structure connection position is effectively restrained, and therefore conveying channel blockage caused by material deposition is avoided.

Description

Technical Field

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

[0002] A pneumatic conveying device is a device that uses the energy of air flow to convey granular or powdery materials along the air flow direction in a closed pipeline.

[0003] Patent Application No. CN202310844922.X discloses a pneumatic conveying equipment, including a feeding hopper, a first feeding pipeline, a drying chamber and a second feeding pipeline. The present invention belongs to the technical field of pneumatic conveying. The silicone rubber elastomer inside the elbow section, after colliding with the material, uses its own elasticity to eject the material, reducing the kinetic energy loss of the material. At the same time, when the elbow section is blocked, after heating the pipeline, the inner diameter of the pipeline expands, increasing the flow space of the material, and the silicone rubber elastomer expands when heated, squeezing the material and destroying the stable structure of the accumulated material, which is beneficial to pipeline dredging.

[0004] When this patent conveys the powder material, it dries the powder material to ensure that the powder material remains dry in the pipeline, preventing the powder material from caking and sticking to the inner wall of the pipeline, causing material blockage; however, this patent heats through the pipe wall, and when the powder material passes through the heating section, it is dried, and the powder material stays 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 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] To achieve the purpose of the present invention, the following technical solutions are adopted: A novel pneumatic conveying device, including: a Roots blower, a feeding pipeline connected to the air outlet of the Roots blower, a feeding mechanism for uniformly feeding along the pipeline laying direction, a dredging mechanism for dredging the pipeline when blocked, and a collection bin for collecting materials; The feeding mechanism includes: a feeding hopper, a drying chamber connected to the feeding hopper, a star-shaped feeding shaft rotatably installed between the drying chamber and the feeding hopper, a driving motor for driving the star-shaped feeding shaft to rotate, and an air inlet fixed installed in the drying chamber; the drying chamber is connected to the feeding pipeline; the air inlet is connected to an external air pump.

[0008] Further, a scraping component is also provided on the drying chamber; The scraping component includes: a scraper slidably installed inside the drying chamber, a driving disk for driving the scraper to move up and down, and a return spring for driving the scraper to reset; the driving disk is coaxially and fixedly connected to the star feeder shaft; the driving disk is provided with multiple sections of protrusions; the scraper is in contact with the driving disk through a contact rod.

[0009] Furthermore, a limiting sleeve is provided on the side wall of the drying chamber, and the limiting sleeve radially restricts the contact rod.

[0010] Furthermore, the dredging mechanism includes: a booster pump, a material poking rod, a piston plate, and a dredging chamber; the dredging chamber is fixedly installed at the turning of the material conveying pipeline; the dredging chamber is communicated with the material conveying pipeline; the piston plate is slidably installed inside the dredging chamber; the material poking rod is fixedly installed on the piston plate; an opening matching the material poking rod is formed on the dredging chamber; the air outlet of the booster pump is communicated with the dredging chamber.

[0011] Furthermore, a sealing gasket is provided on the opening.

[0012] Furthermore, it further includes: a vibration component for driving the material poking rod to vibrate; The vibration component includes: a mounting ring fixedly installed on the material poking rod, a knocking block elastically installed on the mounting ring, and a raised groove formed on the inner wall of the dredging chamber, and the knocking block is slidably installed inside the raised groove.

[0013] Furthermore, multiple feeding ports are formed on the material poking rod, the inside of the material poking rod is hollow, the material poking rod is communicated with the material taking chamber through a hose, and a switch valve is provided on the hose.

[0014] Furthermore, an air outlet is formed on one side of the dredging chamber; the air outlet is communicated with the material conveying pipeline; a one-way valve is provided at the air outlet.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By providing a drying mechanism, the present invention effectively prevents the phenomenon of agglomeration and blockage of materials in the hopper due to moisture absorption, and at the same time drives the scraping rod to perform synchronous axial reciprocating displacement along the side wall of the drying chamber, realizing the dynamic scraping operation of the transition area between the drying chamber and the material conveying pipeline, effectively inhibiting the adhesion and accumulation of materials at the structural connection, thereby avoiding the blockage of the conveying channel caused by material deposition.

[0016] A novel pneumatic conveying device of the present invention is provided with a dredging mechanism. On the one hand, the pressure increasing pump drives the material pushing rod to eject axially, and the mechanical thrust is used to destroy the static balance structure of the accumulated material at the elbow. Combined with the vibration assistance mechanism, the shearing and peeling efficiency of the highly viscous material is enhanced, so as to effectively dredge the powder in the elbow section. On the other hand, the synchronously started fixed-point sampling module, through the negative pressure coupling effect of the hollow material pushing rod and the material taking cavity, in-situ collects the retained powder at the elbow during the dredging operation. Through laboratory physical and chemical analysis, key parameters such as material humidity and particle size distribution can be accurately identified, providing data support for the optimization of process parameters. Brief Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0018] Figure 1 It is a schematic structural diagram of a novel pneumatic conveying device of the present invention; Figure 2 It is a front view of a novel pneumatic conveying device of the present invention; Figure 3 It is a schematic structural diagram of the feeding mechanism in the present invention; Figure 4 is Figure 3 a schematic structural diagram of part A in; Figure 5 It is a schematic structural diagram of the scraping component of the present invention; Figure 6 It is a schematic structural diagram of the dredging mechanism in the present invention; Figure 7 It is a sectional view of the dredging mechanism in the present invention; Figure 8 It is a schematic structural diagram of the vibration component in the present invention.

[0019] In the figure: 1, Roots blower; 2, material conveying pipeline; 3, feeding mechanism; 4, dredging mechanism; 5, collection bin; 31, feeding hopper; 32, drying chamber; 33, star feeding shaft; 34, driving motor; 35, air outlet; 36, scraping component; 361, scraper; 362, driving disc; 363, return spring; 3631, multi-section protrusion; 364, abutting rod; 365, limiting sleeve; 41, pressure increasing pump; 42, material pushing rod; 43, piston plate; 44, dredging cavity; 451, mounting ring; 452, knocking block; 453, protrusion groove; 421, feeding port; 422, hose; 423, material taking cavity; 424, switching valve; 425, air outlet. Detailed Embodiments

[0020] 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 partial embodiments of the present invention, rather than all embodiments.

[0021] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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.

[0022] like Figures 1 to 8 As shown, a novel pneumatic conveying device of the present invention comprises: a Roots blower 1, a material conveying pipeline 2 connected to an air outlet 425 of the Roots blower 1, a feeding mechanism 3 for evenly feeding material arranged in sequence along the laying direction of the pipeline, a dredging mechanism 4 for dredging the pipeline when blocked, and a collecting bin 5 for collecting materials; 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 installed between the drying chamber 32 and the lower hopper 31, a driving motor 34 driving the star-shaped feeding shaft 33 to rotate, and an air delivery port 35 fixedly installed 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; When it is necessary to convey materials, the drive motor 34 is activated, thereby driving the star-shaped feed shaft 33 to rotate. The rotation of the star-shaped feed shaft 33 enables the materials in the upper hopper to be transferred to the drying chamber 32 in equal amounts. When the materials are in free fall in the drying chamber 32 as the star-shaped feed shaft 33 is moved, the air pump injects hot air into the drying chamber 32 through the preset air delivery port 35. In order to effectively convey the hot air, a heater can be installed on the connecting pipe between the air pump and the air delivery port 35 to ensure that the gas conveyed to the drying chamber 32 is in a hot state.

[0023] After the hot air enters the drying chamber 32, it moves back and forth on the inner wall of the drying chamber 32, forming a disordered but efficient vortex air flow. This vortex air flow not only fully blows the powder material falling into the drying chamber 32, but also conducts drying treatment at the same time. This design effectively prevents the phenomenon of agglomeration and blockage caused by moisture absorption of the material in the hopper 31, especially at the side wall and the turning point of the conveying pipeline 2, and significantly improves the fluidity of the material.

[0024] After the hot air blown into the drying chamber 32 is mixed with the material just dropped into the drying chamber 32, they jointly flow into the conveying pipeline 2 to complete the feeding process. It should be noted 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, a fluid will flow from a high-pressure area to a low-pressure area under the action of a pressure difference. Therefore, in this device, the hot air with a relatively small air pressure in the drying chamber 32 will flow and converge towards the direction with a relatively large air pressure in the conveying pipeline 2, thereby forming an effective material conveying power to ensure that the dried material can be smoothly conveyed through the conveying pipeline 2.

[0025] Since the hot air flow transported to the pipeline system in the drying chamber 32 is a high-temperature hot air flow, while the natural flow or maintenance in the conveying pipeline 2 is a low-temperature cold air flow, in the interface area where the hot air flow and the cold air flow meet, the humidity migration effect caused by the temperature gradient is significantly enhanced. Specifically, the partial pressure of water vapor 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, resulting in a sudden increase in the local humidity in this interaction area. This change in humidity conditions greatly enhances the hygroscopicity of the material, making the material prone to adhesion at this interface and gradually accumulating on the inner wall surface of the connecting part, thereby significantly hindering the smooth feeding process of the material.

[0026] A scraping component 36 is also provided on the drying chamber 32; The scraping component 36 includes: a scraper 361 slidably installed inside the drying chamber 32, a driving disk 362 that drives the scraper 361 to move up and down, and a return spring 363 that drives the scraper 361 to reset; the driving disk 362 is coaxially and fixedly connected to the star feeder shaft 33; multiple sections of protrusions 3631 are provided on the driving disk 362; the scraper 361 is in contact with the driving disk 362 through a contact rod 364; During the operation of the driving motor 34, its power output shaft synchronously drives the star feeder shaft 33 and the driving disk 362 to rotate in coordination (for the specific structural configuration, reference can be made to Figure 5(mechanical schematic diagram as shown). The surface of the drive disk 362 is designed with cam structural features. During rotation, its cam surface forms a periodic contact action with the end of the abutting rod 364, and through the geometric constraint of the cam profile, the rotational motion is converted into the linear reciprocating motion of the abutting rod 364. Based on the principle of mechanical transmission continuity, the scraping rod assembly rigidly connected to the abutting rod 364 performs synchronous axial reciprocating displacement along the side wall of the drying chamber 32, realizing the dynamic scraping operation of the transition area between the drying chamber 32 and the feeding pipeline 2, effectively suppressing the adhesion and accumulation of materials at the structural connection, and thus avoiding the blockage of the conveying channel caused by material deposition.

[0027] To ensure the motion accuracy and stability of the mechanical system, a limiting sleeve 365 is provided on the side wall of the drying chamber 32. The limiting sleeve 365 imposes a radial constraint on the abutting rod 364 to ensure that its motion trajectory meets the design requirements. In the mechanical energy transfer path, the return spring 363 is installed between the abutting rod 364 and the cylinder of the limiting sleeve 365 in an elastically pre-tightened manner, and through the spring energy storage characteristic, it provides continuous contact pressure compensation, so that the end of the abutting rod 364 always maintains effective contact with the cam surface of the drive disk 362, thereby constructing a stable mechanical drive closed loop. Through the synergistic effect of cam drive and elastic pre-tightening, this anti-blocking mechanism realizes the active prevention and dynamic clearance of material adhesion problems.

[0028] 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 turning of the feeding pipeline 2; the dredging chamber 44 is communicated with the feeding 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 provided on the dredging chamber 44; the air outlet 425 of the booster pump 41 is communicated with the dredging chamber 44.

[0029] A sealing gasket is provided on the opening to ensure that when materials are transported in the pipeline, the materials will not enter the dredging chamber 44 through the opening on the conveying chamber.

[0030] When the powder material becomes blocked at the turning part of the feeding pipeline 2, the operator manually starts the booster pump 41 device. After the booster pump 41 starts running, it conveys a gas medium with a certain pressure into the connected dredging chamber 44. As the gas continues to be input, the air pressure in the dredging chamber 44 gradually increases. Under the action of the pressure difference, the piston plate 43 is pushed to move along the established direction towards the side of the feeding pipeline 2.

[0031] A material poking rod 42 is fixedly installed on the piston plate 43. When the piston plate 43 moves, the material poking rod 42 is accurately inserted into the interior of the material conveying pipe 2 through a preset opening. The insertion action of the material poking rod 42 can exert an external force on the materials accumulated at the elbow of the material conveying pipe 2, effectively destroying the stable structure formed by the material accumulation, and thus achieving the purpose of dredging the material conveying pipe 2 and eliminating the blockage condition.

[0032] It further includes: a vibration assembly for driving the material poking rod 42 to vibrate; The vibration assembly includes: a mounting ring 451 fixedly installed on the material poking rod 42, a knocking block 452 elastically installed on the mounting ring 451, and a convex groove 453 formed on the inner wall of the dredging cavity 44. The knocking block 452 is slidably installed in the convex groove 453; During the process of the booster pump 41 driving the material poking rod 42 to axially move along the dredging cavity 44, the knocking block 452 provided on the material poking rod 42 moves regularly along the undulating track of the preset wave groove on the inner wall of the dredging cavity 44, continuously hitting the inner wall of the dredging cavity 44. This impact action causes the dredging cavity 44 to generate mechanical vibration, and the vibration energy is effectively transmitted to the elbow part of the material conveying pipe 2 through the structure coupling effect. The internal stable structure of the accumulated materials is destroyed through the energy dissipation effect of the vibration wave, and at the same time, the shearing and peeling efficiency of the material poking rod 42 on the sticky materials is enhanced.

[0033] Multiple feeding ports 421 are formed on the material poking rod 42. The interior of the material poking rod 42 is hollow. The material poking rod 42 is communicated with a material taking cavity 423 through a hose 422, and a switching valve 424 is provided on the hose 422; When the powder materials are blocked in the turning area of the material conveying pipe 2, the booster pump 41 is started to push the material poking rod 42 to move along the dredging cavity 44. At this time, the switching valve 424 on the hose 422 is synchronously opened. During the process of the material poking rod 42 performing the dredging operation to loosen the materials at the elbow, the positive pressure environment maintained in the material conveying pipe 2 presses some of the loose powder materials into the interior of the hollow material poking rod 42 through the feeding ports 421, and then transports them to the material taking cavity 423 through the hose 422 to complete the fixed-point sampling.

[0034] The staff can analyze the physical and chemical properties of the sampled powder materials to accurately diagnose the cause of the blockage: if the test results show that the moisture content of the powder materials exceeds the process standard, the drying process parameters are optimized accordingly to reduce the material humidity; if the blockage still occurs under the condition of normal moisture content, the system dredging ability is improved by adjusting the output pressure parameters of the booster pump 41.

[0035] Based on the above structure, when the powder material gets congested in the pipeline turning area, on the one hand, the pressure boosting pump 41 drives the material poking rod 42 to axially eject, using mechanical thrust to break the static equilibrium structure of the accumulated material at the elbow, and combining with the vibration assistance mechanism to enhance the shearing and peeling efficiency of highly viscous materials, so as to effectively dredge the powder material in the elbow section; on the other hand, the synchronously started fixed-point sampling module, through the negative pressure coupling effect of the hollow material poking rod 42 and the material taking cavity 423, in-situ collects the stagnant powder material at the elbow during the dredging operation. Through laboratory physical and chemical analysis, key parameters such as material humidity and particle size distribution can be accurately identified, providing data support for the optimization of process parameters.

[0036] It should be added here that a plurality of feeding ports 421 are arranged along the material poking rod 42, so that when poking into the elbow, the powder materials at different positions can be sucked, making the detection more comprehensive; at the same time, when the vibration assembly vibrates the elbow, the vibration will also be transmitted to the material poking rod 42. On the one hand, the vibration of the material poking rod 42 can better break the stable structure of the accumulated material, and on the other hand, the vibration of the powder material entering the material poking rod 42 can make it better sucked into the material taking cavity 423 to prevent blockage at the feeding port 421.

[0037] An air outlet 425 is opened on one side of the dredging cavity 44; the air outlet 425 is communicated with the conveying pipeline 2; a one-way valve is provided at the air outlet 425; When the material poking rod 42 moves to the end of this stroke along the dredging cavity 44, the piston plate 43 moves to the upper end of the air outlet 425, and the air in the dredging cavity 44 is filled into the conveying pipeline 2 through the air outlet 425, increasing the conveying air pressure, so as to drive the powder material to continue to be conveyed from the elbow, and accelerating the dredging efficiency of the powder material.

[0038] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0039] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A new type of pneumatic conveying device, characterized in that, Comprising: A Roots blower, a feeding pipeline connected to the air outlet of the Roots blower, a feeding mechanism for uniformly feeding along the laying direction of the pipeline, a dredging mechanism for dredging the pipeline when it is blocked, and a collecting bin for collecting materials; The feeding mechanism includes: a feeding hopper, a drying chamber connected to the feeding hopper, a star-shaped feeding shaft rotatably installed between the drying chamber and the feeding hopper, a driving motor for driving the star-shaped feeding shaft to rotate, and an air inlet fixedly installed in the drying chamber; the drying chamber is connected to the feeding pipeline; the air inlet is connected to an external air pump.

2. The novel pneumatic conveying device according to claim 1, characterized in that, A scraping component is further provided on the drying chamber; The scraping component includes: a scraper slidably installed inside the drying chamber, a driving disk for driving the scraper to move up and down, and a return spring for driving the scraper to reset; the driving disk is fixedly connected coaxially with the star-shaped feeding shaft; multiple sections of protrusions are provided on the driving disk; the scraper is in contact with the driving disk through a contact rod.

3. A novel pneumatic conveying device according to claim 2, characterized in that, A limiting sleeve is provided on the side wall of the drying chamber, and the limiting sleeve radially restricts the contact rod.

4. A novel pneumatic conveying device according to claim 1, characterized in that, 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 turning of the feeding pipeline; the dredging chamber is connected to the feeding 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.

5. A novel pneumatic conveying device according to claim 4, characterized in that, A sealing gasket is provided on the opening.

6. A novel pneumatic conveying device according to claim 4, characterized in that, It further includes: A vibration component for driving the poking rod to vibrate; The vibration component includes: a mounting ring fixedly installed on the poking rod, a knocking block elastically installed on the mounting ring, and a protruding groove provided on the inner wall of the dredging chamber, and the knocking block is slidably installed in the protruding groove.

7. A novel pneumatic conveying device according to claim 6, characterized in that, Multiple feeding ports are provided on the poking rod, the inside of the poking rod is hollow, the poking rod is connected to a material taking chamber through a hose, and a switching valve is provided on the hose.

8. A novel pneumatic conveying device according to claim 7, characterized in that, An air outlet is provided on one side of the dredging chamber; the air outlet is connected to the feeding pipeline; a one-way valve is provided at the air outlet.

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