Double casing for long distance pneumatic conveying

Abstract

The application relates to a double-sleeve pipe for long-distance pneumatic conveying, which comprises a material guide pipe, an air guide pipe and a baffle. The material guide pipe is a hollow tubular structure, and two ends thereof are respectively adapted to be connected with a material pouring inlet and a material pouring outlet. The air guide pipe is a hollow tubular structure, is embedded in the inside of the material guide pipe, is fixedly connected with the inner wall of the material guide pipe, and is provided with a plurality of air guide holes on the opposite side connected with the material guide pipe. The air guide holes are arranged in the direction towards the inside of the material guide pipe. The baffle is a plate-shaped structure, is embedded in the inside of the air guide hole, and the plate surface of the baffle is provided with an air outlet hole. The double-pipe nested structure realizes the separation of material conveying and air flow supply, avoids the conveying disorder caused by the direct impact of air flow on the material, and can improve the air flow to help the flow of the material in the inside of the material guide pipe. The double-layer air flow guiding structure of the air guide hole and the air outlet hole can control the direction and rate of the air flow entering the material guide pipe, prevent the local air flow from being too strong or too weak, and effectively reduce the risk of accumulation and blockage of the material in the material guide pipe.

Description

Technical Field

[0001] This application relates to the field of material conveying pipe technology, and in particular to a double-sleeved pipe for long-distance pneumatic conveying. Background Technology

[0002] In long-distance pneumatic conveying, especially for fluids containing large particles, traditional single-pipe conveying structures are prone to material accumulation and blockage due to uneven airflow distribution and air pressure attenuation. Furthermore, the pipe connection stability is poor and the maintenance cost is high, making it difficult to meet the needs of efficient and stable long-distance conveying. Utility Model Content

[0003] To address the problem of inconsistent material conveying in traditional pipelines, this utility model provides a double-sleeve pipe for long-distance pneumatic conveying, comprising: Feed pipe, air pipe and baffle; The feed tube is a hollow tubular structure, with its two ends suitable for connecting to the discharge inlet and discharge outlet, respectively. The air guide tube is a hollow tubular structure, which is embedded inside the material guide tube. The air guide tube is fixedly connected to the inner wall of the material guide tube, and multiple air guide holes are opened on the opposite side of the air guide tube and the material guide tube. The opening direction of the air guide holes is towards the inside of the material guide tube. The baffle is a plate-shaped structure, embedded inside the air guide hole, located in the middle of the air guide hole, and the baffle has an air outlet on its plate surface, which is adjacent to the material guide pipe.

[0004] In one possible implementation, the baffle is tilted toward the air outlet direction of the air duct.

[0005] In one possible implementation, there are multiple air vents arranged in an array.

[0006] One possible implementation also includes: fixing bolts; The feed tube is provided with a plurality of first fixing holes spaced apart along its length; The air guide tube is provided with multiple second fixing holes spaced apart along its length; The fixing bolts pass through the first fixing hole and the second fixing hole in sequence, and the material guide tube is bolted to the air guide tube.

[0007] In one possible implementation, the cross-sectional diameter of the air guide tube is 1 / 4 to 1 / 3 of the cross-sectional diameter of the material guide tube.

[0008] In one possible implementation, multiple air guide holes are spaced apart along the length of the feed tube.

[0009] In one possible implementation, the baffle has a circular cross-section, and the diameter of the baffle is equal to the diameter of the air duct.

[0010] In one possible implementation, the feed tube is provided with connecting flanges at both ends.

[0011] In one possible implementation, multiple inflation devices are provided along the length of the air duct; The output end of the inflation device passes through the material guide tube and the air guide tube to the interior of the air guide tube.

[0012] In one possible implementation, the air duct is made of steel.

[0013] The beneficial effects of the double-tube long-distance pneumatic conveying system in this application embodiment are as follows: The nested double-tube structure separates material conveying from airflow supply, avoiding conveying disturbances caused by direct airflow impact on materials, and can enhance airflow to help the material flow inside the guide tube. The double-layer airflow guiding structure of the air guide hole and the air outlet hole can control the direction and speed of airflow entering the guide tube, prevent local airflow from being too strong or too weak, effectively reduce the risk of material accumulation and blockage in the guide tube, and the baffle not only prevents materials from entering the air guide tube in reverse, but also refines the airflow through the air outlet hole, improves the mixing uniformity of airflow and materials, and thus improves the efficiency of long-distance conveying.

[0014] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0016] Figure 1 A cross-sectional schematic diagram of a double-sleeve pipe for long-distance pneumatic conveying according to an embodiment of this application is shown; Figure 2 A partial cross-sectional schematic diagram of a double-sleeve pneumatic conveying system according to an embodiment of this application is shown; Figure 3 This is a side view of a double-tube pneumatic conveying system according to an embodiment of this application. Detailed Implementation

[0017] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0018] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0021] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0022] like Figures 1-3 As shown, the long-distance pneumatic conveying double-tube system of this application embodiment includes: a material guide tube 1, an air guide tube, and a baffle 6. The material guide tube 1 is a hollow tubular structure, with both ends suitable for connecting to the material inlet and the material outlet, respectively. The air guide tube 2 is a hollow tubular structure, embedded inside the material guide tube 1. The air guide tube 2 is fixedly connected to the inner wall of the material guide tube 1, and multiple air guide holes 21 are opened on the opposite side of the connection between the air guide tube 2 and the material guide tube 1. The opening direction of the air guide holes 21 is towards the inside of the material guide tube 1. The baffle 6 is a plate-shaped structure, embedded inside the air guide holes 21, located in the middle of the air guide holes 21, and an air outlet 61 is opened on the plate surface of the baffle 6, which is adjacent to the material guide tube 1.

[0023] In this specific embodiment, the nested double-tube structure separates material conveying from airflow supply, avoiding conveying disturbances caused by direct airflow impacting the material. It also enhances airflow to facilitate material flow within the guide tube 1. The double-layer airflow guiding structure of the air guide hole 21 and the air outlet 61 controls the direction and speed of airflow entering the guide tube 1, preventing excessively strong or weak local airflow and effectively reducing the risk of material accumulation and blockage within the guide tube 1. The baffle 6 prevents material from entering the air guide tube 2 in reverse and refines the airflow through the air outlet 61, improving the uniformity of airflow and material mixing, thereby enhancing long-distance conveying efficiency.

[0024] Specifically, the feed pipe 1 is a hollow tubular structure, with its two ends adapted to connect to an external discharge inlet and outlet, forming the main channel for material conveying. The air pipe 2 is also a hollow tubular structure, integrally embedded within the internal cavity of the feed pipe 1. The outer wall of the air pipe 2 is fixedly connected to the inner wall of the feed pipe 1 by welding or pre-installed connectors. On the opposite side of the connection between the air pipe 2 and the inner wall of the feed pipe 1, i.e., on the side of the air pipe 2 away from the inner wall of the feed pipe 1, the air pipe 2 is evenly coated with a mixture of air and water. Multiple air guide holes 21 are provided, and the opening direction of all air guide holes 21 is towards the internal cavity of the guide tube 1 to ensure that the airflow can enter the guide tube 1 from the air guide tube 2. The baffle 6 is a flat plate structure, and a baffle 6 is embedded inside each air guide hole 21. The baffle 6 is located in the axial middle position of the air guide hole 21. Multiple air outlet holes 61 are provided on the plate surface of the baffle 6. The air outlet holes 61 are located close to the inner wall of the guide tube 1, that is, the air outlet holes 61 face the material channel inside the guide tube 1.

[0025] In one specific embodiment, the baffle 6 is inclined, tilted toward the air outlet direction of the air guide tube 2.

[0026] In this specific embodiment, the tilting direction of the multiple baffles 6 is consistent with the airflow direction, which can reduce the resistance of the airflow when passing through the baffles 6, reduce air pressure loss, and ensure the air pressure stability of long-distance transportation. Furthermore, the slope of the tilted baffles 6 can guide the material to move along the airflow direction, preventing material accumulation on the surface of the baffles 6, and simultaneously assisting the airflow in propelling the material forward, further reducing the probability of blockage. Specifically, the baffles 6 are installed at an angle, with their tilting direction consistent with the airflow direction in the air guide pipe 2. The specific tilting angle can be adjusted according to the particle size of the conveyed material, and the tilting plane of the baffles 6 forms a preset angle with the axis of the air guide hole 21.

[0027] In one specific embodiment, there are multiple air outlets 61 arranged in an array. The array arrangement allows the airflow to diffuse evenly across the cross-section of the guide pipe 1 after passing through the air outlets 61, avoiding material deviation caused by localized airflow concentration and ensuring that the material is evenly distributed radially within the guide pipe 1. Furthermore, the simultaneous airflow from multiple air outlets 61 increases the contact area between the airflow and the material, improving the efficiency of the airflow in driving the material, which is particularly suitable for high-flow-rate material conveying scenarios.

[0028] In one specific embodiment, the system further includes: fixing bolts 4; the material guide pipe 1 has multiple first fixing holes spaced apart along its length; the air guide pipe 2 has multiple second fixing holes spaced apart along its length; the fixing bolts 4 pass through the first fixing holes and the second fixing holes in sequence, and the material guide pipe 1 and the air guide pipe 2 are bolted together. Bolting is more flexible than welding. If the air guide pipe 2 is damaged later, the bolts can be directly removed to replace the air guide pipe 2, eliminating the need to replace the entire double sleeve, significantly reducing maintenance costs and replacement cycles. The spaced fixing holes along the length ensure the connection stability of the material guide pipe 1 and the air guide pipe 2 throughout their entire length, preventing relative displacement due to vibration during conveying and ensuring structural reliability.

[0029] In one specific embodiment, the cross-sectional diameter of the air guide pipe 2 is 1 / 4 to 1 / 3 of the cross-sectional diameter of the material guide pipe 1. This 1 / 4 to 1 / 3 diameter ratio represents the optimal balance. If the air guide pipe 2 is too thick, it will occupy too much space in the material guide pipe 1, reducing the material conveying capacity. If it is too thin, the airflow pressure inside the air guide pipe 2 will be insufficient, making it impossible to propel the material over long distances. This ratio can adapt to the conveying needs of most granular materials, ensuring that the airflow can provide sufficient thrust without affecting the normal flow of the material.

[0030] In one specific embodiment, multiple air guide holes 21 are spaced apart along the length of the feed pipe 1. The spaced air guide holes 21 along the length direction allow airflow to be supplied evenly throughout the entire length of the feed pipe 1, avoiding the problem of air pressure attenuation in the middle section caused by supplying air only at both ends, and ensuring that the material can be propelled by a stable airflow throughout the entire process of long-distance transportation.

[0031] In one specific embodiment, the baffle 6 has a circular cross-section, and the cross-sectional diameter of the baffle 6 is equal to the cross-sectional diameter of the air duct 2.

[0032] In one specific embodiment, the feed pipe 1 is provided with connecting flanges 3 at both ends. The flanges 3 are easy to connect and disassemble, which facilitates the installation, maintenance and replacement of the double sleeve.

[0033] In one specific embodiment, multiple inflation devices 5 are provided along the length of the air guide pipe 2. The output end of the inflation device 5 passes through the material guide pipe 1 and the air guide pipe 2, reaching the interior of the air guide pipe 2. The multiple inflation devices 5 can replenish air in sections along the length of the air guide pipe 2, effectively solving the problem of airflow pressure attenuation during long-distance transportation, ensuring sufficient air pressure throughout the air guide pipe 2. The inflation devices 5 directly supply air to the interior of the air guide pipe 2, resulting in high air replenishment efficiency. Furthermore, by adjusting the output pressure of the inflation devices 5, they can be adapted to materials of different densities and particle sizes, expanding the applicability of the equipment.

[0034] In one specific embodiment, the air guide pipe 2 is made of steel. Steel has high strength and good impact resistance, and can withstand the high-pressure airflow and slight impacts from materials inside the air guide pipe 2, preventing deformation or breakage of the air guide pipe 2, extending the service life of the equipment. In addition, the corrosion resistance of steel can adapt to the conveying environment of humid or corrosive materials, avoiding airflow leakage or pipe damage caused by material corrosion, and reducing the probability of equipment failure.

[0035] In one specific embodiment, blocking plates 8 are provided at both ends of the air duct 2.

[0036] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A double-sleeve pipe for long-distance pneumatic conveying, characterized in that, include: Feed pipe, air pipe and baffle; The feed tube is a hollow tubular structure, with its two ends suitable for connecting to the discharge inlet and discharge outlet, respectively. The air guide tube is a hollow tubular structure, which is embedded inside the material guide tube. The air guide tube is fixedly connected to the inner wall of the material guide tube, and multiple air guide holes are opened on the opposite side of the air guide tube and the material guide tube. The opening direction of the air guide holes is towards the inside of the material guide tube. The baffle is a plate-shaped structure, embedded inside the air guide hole, located in the middle of the air guide hole, and the baffle has an air outlet on its plate surface, which is adjacent to the material guide pipe.

2. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The baffle is inclined, tilted towards the air outlet direction of the air guide pipe.

3. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The air outlets are multiple and arranged in an array.

4. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, Also includes: Fixing bolts; The feed tube is provided with a plurality of first fixing holes spaced apart along its length; The air guide tube is provided with multiple second fixing holes spaced apart along its length; The fixing bolts pass through the first fixing hole and the second fixing hole in sequence, and the material guide tube is bolted to the air guide tube.

5. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The cross-sectional diameter of the air guide tube is 1 / 4 to 1 / 3 of the cross-sectional diameter of the material guide tube.

6. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, Multiple air guide holes are spaced apart along the length of the feed tube.

7. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The baffle has a circular cross-section, and the diameter of the baffle is equal to the diameter of the air duct.

8. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The feed tube is equipped with connecting flanges at both ends.

9. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, Multiple inflation devices are provided along the length of the air duct; The output end of the inflation device passes through the material guide tube and the air guide tube to the interior of the air guide tube.

10. The double-sleeve pipe for long-distance pneumatic conveying according to claim 1, characterized in that, The air duct is made of steel.

Images