A material air conveying system

Abstract

The utility model provides a kind of material air conveying system, belong to material transport technical field, specific material air conveying system main pipe, branch pipe, air pipe group, main fan and iron removal assembly;The main pipe is L type, its vertical edge top is equipped with inlet, horizontal edge end is equipped with discharge port;The air pipe group is fixedly installed on the outer wall of the horizontal edge of the main pipe, every air pipe group includes upper air pipe and lower air pipe, the axis between the upper air pipe and the lower air pipe and the horizontal edge axis of main pipe has included angle;The main fan is installed at the junction of the vertical edge and the horizontal edge of the main pipe;The branch pipe is fixedly arranged in the main pipe, and located in the horizontal edge section of the main pipe;The iron removal assembly is installed on the branch pipe, for adsorbing and removing iron filings in material;The present material air conveying system can solve the problem of low degree of automation of conveying stability and iron removal function of conventional material air conveying device.

Description

Technical Field

[0001] This utility model belongs to the field of material conveying technology, and specifically relates to a material pneumatic conveying system. Background Technology

[0002] Pneumatic conveying systems, also known as airflow conveying systems, are a type of conveying system that uses airflow as power to transport powders or granular materials within pipelines. Pneumatic conveying systems are complex systems engineering projects; by employing different configurations and equipment combinations, they can integrate multiple production stages, and therefore have been widely used in numerous industries.

[0003] At present, pneumatic conveying systems integrate multiple production processes and, in conjunction with automation systems, adopt fully automatic control, which has greatly reduced the degree of manual intervention. A complete set of automated control technology is also an important component of a complete pneumatic conveying system.

[0004] A study of existing pneumatic conveying equipment on the market revealed the following problems: 1. Single function problem: Traditional pneumatic conveying systems are only responsible for conveying and cannot remove magnetic metal impurities from materials online. They require additional configuration and layout of independent iron removal equipment, resulting in a long production line, large footprint, and high energy consumption.

[0005] 2. Conveying stability and energy consumption issues: Traditional systems with single wind direction or non-segmentable wind force are prone to material deposition, increased pipe wear, or even blockage due to power attenuation during long-distance transportation, and have high energy consumption.

[0006] 3. Low level of automation in the iron removal process: Traditional iron removal devices require manual cleaning of iron filings after shutdown, which affects production efficiency and increases labor costs and labor intensity.

[0007] 4. System reliability issues: During the conveying process, materials may accidentally enter the air supply duct, causing damage to the fan or system blockage, affecting continuous and stable operation. Utility Model Content

[0008] In view of this, this utility model proposes a material pneumatic conveying system that can solve the problems of low conveying stability and low degree of automation in iron removal function of traditional pneumatic conveying equipment.

[0009] This utility model is implemented as follows: This utility model provides a material conveying system, including a main pipe, a secondary pipe, a duct assembly, a main fan, and an iron removal component; The main pipe is L-shaped, with a feed inlet at the top of its vertical side and a discharge outlet at the end of its horizontal side. The duct assembly is fixedly installed on the outer wall of the main pipe's horizontal side. Each duct assembly includes an upper duct and a lower duct, and the axes of the upper duct and the lower duct have an angle with the axis of the main pipe's horizontal side. The main fan is installed at the junction of the vertical and horizontal sides of the main tube; The secondary pipe is inserted and fixedly installed inside the main pipe and is located on the horizontal side section of the main pipe; The iron removal component is installed on the secondary pipe and is used to adsorb and remove iron filings from the material.

[0010] Based on the above technical solution, the material pneumatic conveying system of this utility model can be further improved as follows: Furthermore, the angle between the upper duct and the horizontal direction is °-°, and the angle between the lower duct and the horizontal direction is °-°; the distance between the upper duct and the lower duct is .- times the duct diameter; and duct fans are installed inside both the upper duct and the lower duct.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that by setting the angle between the upper and lower air ducts and the horizontal direction, a suspended airflow is formed in the main duct, ensuring the normal transportation of materials.

[0012] Furthermore, the main fan is controlled independently; all the duct fans in the upper duct are centrally and uniformly controlled, and all the duct fans in the lower duct are centrally and uniformly controlled.

[0013] Furthermore, a protective net is fixedly installed at the connection between the downdraft duct and the main duct.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that by setting up a protective net, materials can be prevented from entering the fan in the lower duct and causing damage to the fan rotation.

[0015] Furthermore, the iron removal assembly includes: Electromagnet, two draw plates, two scrapers, two chip collection troughs, and two electric actuators; The electromagnet is fixedly installed at the center of the lower surface of the secondary tube; The draw plate is slidably installed inside the secondary tube near the bottom surface and above the electromagnet; The scraper is fixedly installed inside the secondary pipe and located above the draw plate. The bottom of the scraper is provided with a brush that fits against the upper surface of the draw plate. The two chip collection slots are respectively located below the draw plate and on both sides of the electromagnet; chip collection boxes are inserted into the chip collection slots; The electric actuator is fixedly installed at the bottom of the chip collection groove, and the output end of the electric actuator is drivenly connected to the end of the draw plate.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are: by setting an electromagnet, iron filings in the material can be adsorbed onto the drawing plate; by setting a brush, the iron filings attached to the drawing plate can be swept into the inside of the chip collection box; by setting an electric push rod, the drawing plate can be moved, and the chip collection groove can be opened to expose the inside chip collection box.

[0017] Furthermore, the electric actuator, chip collection groove, draw plate, and scraper are arranged in a mirror image with the central longitudinal section in the width direction of the secondary tube as the plane of symmetry.

[0018] Furthermore, the scraper is located directly above the chip collection groove, and the vertical projection of the bottom of the scraper brush is biased towards the side of the chip collection groove away from the central axis of the secondary pipe.

[0019] Furthermore, a laser sensor for detecting the thickness of iron filings on the upper surface of the scraper is installed on the side wall of the scraper.

[0020] Furthermore, the iron removal components are configured in multiple groups, arranged at intervals along the length of the secondary pipe; the system is configured to keep the electromagnets of at least two iron removal components energized when performing the cleaning operation of any iron removal component.

[0021] Furthermore, the sidewall at the junction of the vertical and horizontal sides of the main tube extends outward to form an outer edge housing, and the main fan is installed inside the outer edge housing.

[0022] Compared with the prior art, the beneficial effects of the material pneumatic conveying system provided by this utility model are: 1. Highly efficient integrated iron removal: A secondary pipe with an electromagnet is directly embedded in the main conveying pipe, realizing the integration and synchronization of the "conveying" and "magnetic separation iron removal" processes. There is no need to add a separate iron removal device outside the conveying line, saving space and cost and improving process continuity.

[0023] 2. Forming a stable pneumatic conveying layer: By setting up upper and lower air ducts with a specific angle and precisely controlling the wind speed on the same side to be the same, the airflow blown in obliquely from both sides can form a stable "air cushion" or "suspended layer" in the main pipe, effectively supporting the material and reducing the friction, wear and tear between the material and the pipe wall and the risk of pipe blockage.

[0024] 3. Power Configuration and Segmented Control Optimization: The system adopts a combination of a main fan and multiple duct fans, with centralized and independent control of the fans in the upper and lower duct groups. This design allows for precise segmented and zoned adjustment of airflow power, ensuring both initial acceleration and maintaining stable wind speeds over long distances, resulting in greater energy efficiency.

[0025] 4. Automated and uninterrupted iron removal: The iron removal components constitute an automatic cleaning mechanism. Without stopping the system, the adsorbed iron filings are automatically collected into the filings box through the movement of the sliding plate and the scraping of the brush, realizing the automation and continuity of the iron removal operation.

[0026] 5. Intelligent Control and Quality Assurance: By installing laser sensors on the scraper to monitor the thickness of iron filings, the cleaning action can be triggered on demand, such as by timed or thickness-based settings, thus improving the level of intelligence. Simultaneously, a control strategy ensures that at least two electromagnets are operating at all times, guaranteeing that the material remains within the effective magnetic separation range throughout the entire iron removal process, eliminating "magnetic blind spots." Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure; Figure 2 This is a cross-sectional view of the overall structure; Figure 3 This is a structural diagram of the secondary pipe; Figure 4 This is a cross-sectional view of the secondary pipe structure.

[0028] Based on the above figures, the reference numerals and their names in the figures are as follows: 1. Main pipe; 11. Feed inlet; 12. Discharge outlet; 2. Secondary pipe; 21. Electromagnet; 22. Draw plate; 23. Scraper; 24. Electric actuator; 25. Chip collection trough; 251. Chip collection box; 3. Upper air duct; 4. Lower air duct; 5. Main fan; 6. Air duct fan; 7. Protective net. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0030] As shown in the attached figure, this utility model provides a material conveying system that mainly utilizes airflow as power to transport powdery or granular materials from one location to another.

[0031] The material conveying system specifically includes a main pipe 1 and a secondary pipe 2. The main pipe 1 serves as the primary conveying duct of the system, handling material feeding and conveying. The secondary pipe 2 is interspersed within the main pipe 1, acting as a screening structure to adsorb and remove iron filings from the material.

[0032] The main pipe 1 is L-shaped, with the vertical opening serving as the feed inlet 11, used to pour the materials to be conveyed and screened into the main pipe 1. The horizontal side serves as the main conveying channel, and the horizontal opening serves as the discharge outlet 12. Multiple air duct assemblies are fixedly installed on its outer wall, and the air duct assembly consists of an upper air duct 3 and a lower air duct 4.

[0033] The openings of both the upper air duct 3 and the lower air duct 4 form a certain angle with the horizontal edge of the main pipe 1, ensuring that the air entering the horizontal edge of the main pipe 1 is at an angle. The angle between the upper air duct 3 and the horizontal direction is between 20° and 35°, and the angle between the lower air duct 4 and the horizontal direction is between 15° and 30°. In this embodiment, the angle between the upper air duct 3 and the horizontal edge of the main pipe 1 is 25°, and the angle between the lower air duct 4 and the horizontal edge of the main pipe 1 is 20°. The distance between the upper air duct 3 and the lower air duct 4 is 0.5-1 times the pipe diameter, with the lower air duct 4 being closer to the discharge port 12 than the upper air duct 3.

[0034] A main fan 5 is fixedly installed at the junction of the vertical and horizontal sides of the main pipe 1; duct fans 6 are fixedly installed inside both the upper duct 3 and the lower duct 4. The main fan 5 provides the basic power for material conveying, while the duct fans 6 provide the core power for subsequent material movement. The main fan 5 is controlled individually, while the duct fans 6 located on the same side of the main pipe 1 are controlled uniformly. That is, all duct fans 6 in the upper duct 3 and all duct fans 6 in the lower duct 4 are centrally controlled. This ensures that the wind speed blowing from the upper duct 3 and the lower duct 4 towards the horizontal side of the main pipe 1 is the same on one side, and a stable pneumatic conveying layer is formed by utilizing the included angle.

[0035] A protective net 7 is also fixedly installed at the connection between the downdraft duct 4 and the main duct 1. Due to the gravity of the material and the airflow blown out of the updraft duct 3, the material will not enter the updraft duct 3 in most cases. To prevent the material from falling into the downdraft duct 4, the protective net 7 is used to block it, providing the corresponding airflow while preventing the material from falling in.

[0036] The secondary pipe 2 is also fixedly equipped with an iron removal assembly for removing iron filings and impurities mixed in with the material. The iron removal assembly mainly includes an electromagnet 21, a pull plate 22, a scraper 23, and a chip collection trough 25. There is one electromagnet 21, which is fixedly mounted on the center of the lower surface of the secondary pipe 2. There are two pull plates 22, both slidably mounted inside the secondary pipe 2 near the bottom surface. There are also two scrapers 23, both inserted and fixedly mounted inside the secondary pipe 2, located above the pull plates 22. The lower part of the scrapers 23 has a brush structure, with the bottom end of the brush attached to the upper surface of the pull plates 22. There are two chip collection troughs 25, respectively located on both sides of the electromagnet. A chip collection box 251 is inserted and installed inside the chip collection trough 25. The upper opening of the chip collection trough 25 communicates with the interior of the secondary pipe 2, so the interior of the chip collection box 251 is also connected to the interior of the secondary pipe 2. The chip collection box 251 can then be used to collect the iron filings attracted by the electromagnet 21. Two electric actuators 24 are also fixedly installed on the lower surface of the chip collection groove 25. The output end of the electric actuator 24 is in contact with the end of the draw plate 22, and the draw plate 22 is driven to move back and forth in the secondary tube 2 by the electric actuator 24.

[0037] Specifically, the electric actuator 24, chip collection groove 25, pull plate 22, and scraper 23 are all mirror images of the central section of the secondary tube 2 perpendicular to its length direction.

[0038] Optionally, to avoid the main fan 5 affecting the material conveying, an outer edge housing is provided on the side wall of the vertical side where the vertical and horizontal sides of the main pipe 1 meet, and the main fan 5 is installed inside the outer edge housing.

[0039] Optionally, the scraper 23 is located directly above the chip collection groove 25 and is biased toward the side wall of the chip collection groove 25 away from the central axis of the secondary pipe 2.

[0040] Optionally, scraper 23 is located directly above the center of chip collection groove 25.

[0041] Optionally, a laser sensor for detecting the thickness of iron filings on the upper surface of the scraper 22 is also provided on the side wall of the scraper 23, and the transmitter and receiver of the laser sensor are respectively installed on the inner side of the two scrapers 23.

[0042] The principle of this utility model is as follows: Start the main fan 5 and the duct fan 6, and add material from the feed inlet 11 of the main pipe 1. Under the action of the main fan 5 and the duct fan 6, the material moves along the horizontal side of the main pipe 1 towards the discharge outlet 2.

[0043] When material carrying iron filings passes through the secondary pipe 2, it is attracted to the upper surface of the scraper plate 22 by the electromagnet 21 at the bottom of the secondary pipe 2. After a certain period of time, or when the laser sensor signal on the scraper plate 23 changes, the electric push rod 24 is activated, driving the scraper plate 23 to move. At this time, the electromagnet 21 is turned off, the speed of the main fan 5 and the duct fan 6 decreases, and the iron filings attached to the scraper plate 22 are blocked by the brush below the scraper plate 23 and fall into the chip collection box 251 for collection. After a period of time, the chip collection box 251 is replaced.

[0044] During the process of de-energizing electromagnet 21 and scraper 23 cleaning iron filings on plate 22, ensure that at least two electromagnets 21 remain energized throughout the entire equipment to ensure that the magnetic separation process of the material is carried out throughout the entire process.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A material pneumatic conveying system, characterized in that, include: Main pipe (1), secondary pipe (2), duct assembly, main fan (5), and iron removal components; The main tube (1) is L-shaped, with a feed inlet (11) at the top of its vertical side and a discharge outlet (12) at the end of its horizontal side. The duct assembly is fixedly installed on the outer wall of the horizontal side of the main pipe (1). Each duct assembly includes an upper duct (3) and a lower duct (4). The axes of the upper duct (3) and the lower duct (4) have an angle with the axis of the horizontal side of the main pipe (1). The main fan (5) is installed at the junction of the vertical and horizontal sides of the main tube (1); The secondary pipe (2) is inserted and fixed inside the main pipe (1) and is located on the horizontal side of the main pipe (1); The iron removal component is installed on the secondary pipe (2) and is used to adsorb and remove iron filings from the material.

2. The material pneumatic conveying system according to claim 1, characterized in that, The angle between the upper air duct (3) and the horizontal direction is 20°-35°, and the angle between the lower air duct (4) and the horizontal direction is 15°-30°; the distance between the upper air duct (3) and the lower air duct (4) is 0.5-1 times the pipe diameter; both the upper air duct (3) and the lower air duct (4) are equipped with air duct fans (6).

3. The material pneumatic conveying system according to claim 2, characterized in that, The main fan (5) is independently controlled; all the duct fans (6) in the upper air duct (3) are centrally and uniformly controlled; and all the duct fans (6) in the lower air duct (4) are centrally and uniformly controlled.

4. The material pneumatic conveying system according to claim 1, characterized in that, A protective net (7) is fixedly installed at the connection between the downdraft duct (4) and the main duct (1).

5. A material pneumatic conveying system according to claim 1, characterized in that, The iron removal assembly includes: Electromagnet (21), two draw plates (22), two scrapers (23), two chip collection grooves (25), and two electric actuators (24); The electromagnet (21) is fixedly installed at the center of the lower surface of the secondary tube (2); The draw plate (22) is slidably installed inside the secondary tube (2) near the bottom surface and above the electromagnet (21); The scraper (23) is fixedly installed inside the sub-tube (2) and located above the draw plate (22). The bottom of the scraper (23) is provided with a brush that fits against the upper surface of the draw plate (22). The two chip collection slots (25) are respectively located below the draw plate (22) and on both sides of the electromagnet (21); a chip collection box (251) is inserted into the chip collection slot (25); The electric actuator (24) is fixedly installed at the bottom of the chip collection groove (25), and the output end of the electric actuator (24) is driven to be connected to the end of the draw plate (22).

6. A material pneumatic conveying system according to claim 5, characterized in that, The electric actuator (24), chip collection groove (25), pull plate (22) and scraper (23) are mirror images of the central longitudinal section of the secondary tube (2) in the width direction.

7. A material pneumatic conveying system according to claim 5, characterized in that, The scraper (23) is located directly above the chip collection groove (25), and the projection of the bottom of the brush of the scraper (23) in the vertical direction is biased toward the side of the chip collection groove (25) away from the central axis of the secondary pipe (2).

8. A material pneumatic conveying system according to claim 5 or 7, characterized in that, A laser sensor for detecting the thickness of iron filings on the upper surface of the scraper (22) is installed on the side wall of the scraper (23).

9. A material pneumatic conveying system according to claim 5, characterized in that, The iron removal components are configured in multiple groups and arranged at intervals along the length of the secondary pipe (2); the system is configured to keep the electromagnets (21) of at least two iron removal components in an energized working state when performing the cleaning operation of any iron removal component.

10. A material pneumatic conveying system according to claim 1, characterized in that, The sidewall at the junction of the vertical and horizontal sides of the main tube (1) extends outward to form an outer edge housing, and the main fan (5) is installed inside the outer edge housing.

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