Solid particle conveying device and production line

Abstract

The invention relates to the technical field of solid particle conveying, and provides a solid particle conveying device and a production line, the solid particle conveying device comprises a conveying pipeline, one end of the conveying pipeline is connected with a feeding structure, and the other end of the conveying pipeline is connected with a discharging structure; at least two air supply outlets are formed in the side wall of the conveying pipeline and distributed in the length direction of the conveying pipeline at intervals. The number of the air supply branch pipes is matched with that of the air supply outlets, and one ends of the air supply branch pipes communicate with the air supply outlets; the included angle between the axis of the air supply branch pipe and the axis of the conveying pipeline is larger than zero, and the air supply branch pipe inclines towards the feeding structure. The air blower communicates with the end, away from the conveying pipeline, of the air supply branch pipe. The technical problems that in the prior art, a solid particle conveying device adopts a conveying mode that an air blower is arranged at one end of a pipeline to supply air, air force can be gradually attenuated along with increasing of the distance, and the conveying efficiency, cooling efficiency and drying efficiency of solid particles are low can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid particle conveying, and in particular to a solid particle conveying device and a production line. Background Art

[0002] When conveying solid particles, such as granular agricultural products such as grains and beans, and granular chemical products such as plastic particles or hot-melt adhesive particles, the prior art, such as a granular material conveying equipment disclosed in publication number CN118651686B, usually adopts pipeline transportation, wherein a feed structure is arranged at one end of the pipeline, and a discharge structure is arranged at the other end; an air supply port is arranged at one end of the pipeline close to the feed structure; the air supply port is connected to a blower, and the air supply direction of the blower is parallel to the axial direction of the pipeline, which can drive the solid particles to move along the axial direction of the pipeline until they reach the discharge structure, and can also enable the solid particles to exchange heat with the airflow, thereby achieving the effect of cooling and drying the solid particles and preventing the solid particles from sticking to each other during transportation.

[0003] However, during actual use, the inventors found that since the interaction between solid particles and airflow consumes the kinetic energy of the airflow, the intensity of the airflow blown by the blower will gradually decay along the axial direction of the pipeline. On the one hand, the closer the solid particles are to the discharge structure, the slower the movement speed will be, thereby reducing the transportation efficiency; on the other hand, the interaction between the solid particles and the airflow will gradually weaken, resulting in low cooling efficiency or drying efficiency of the solid particles. If a specified cooling or drying effect is to be achieved, the length of the pipeline needs to be further lengthened to extend the interaction time between the solid particles and the airflow, but this will further aggravate the airflow attenuation in the pipeline, thus forming a vicious cycle in which the cooling and drying efficiency will decrease as the pipeline length increases, and an excessively long pipeline will also take up a lot of space, resulting in an increase in the land cost of the factory; therefore, there is an urgent need to develop a new type of solid particle conveying device. Summary of the invention

[0004] The purpose of the present invention is to overcome the technical problem that in the prior art, a solid particle conveying device adopts a conveying mode in which a blower is arranged at one end of a pipeline to supply air, and the wind force gradually decays with increasing distance, resulting in low conveying efficiency, cooling efficiency and drying efficiency of the solid particles, and to provide a solid particle conveying device and a production line.

[0005] In a first aspect, the present invention provides a solid particle conveying device, comprising: A transport pipeline, one end of which is connected to the feed structure, and the other end of which is connected to the discharge structure; at least two air supply ports are arranged on the side wall of the transport pipeline, and the air supply ports are spaced apart along the length direction of the transport pipeline; Air supply branch pipes, the number of which matches the number of air supply outlets, and one end of the air supply branch pipe is connected to the air supply outlet; the angle between the axis of the air supply branch pipe and the axis of the transport pipeline is greater than zero, and the air supply branch pipe is inclined in the direction of the feeding structure; The blower is connected with one end of the air supply branch pipe away from the transport pipeline.

[0006] Compared with the existing technology of only setting an air supply outlet and a blower at one end of the transport pipeline, this solution chooses to set an air supply outlet on the side wall of the transport pipeline and connect the air supply branch pipe and the blower. Since the air supply branch pipe is set at an angle relative to the transport pipeline, the airflow entering the transport pipeline through the air supply branch pipe will move in the direction of the discharge structure, thereby also driving the solid particles to move in the direction of the discharge structure.

[0007] And because the present solution arranges at least two air outlets at intervals along the length direction of the transport pipeline, the airflow starting from the blower can directly reach different positions of the transport pipeline through the corresponding air outlets, especially for the rear section of the transport pipeline (the part close to the discharge structure), the airflow can directly enter the transport pipeline from the air outlet close to the discharge structure without passing through the area in front of the air outlet (close to the side of the feed structure), thereby avoiding the situation where the airflow loses a lot of kinetic energy due to interaction with the solid particles in the front section of the transport pipeline before reaching the rear section of the transport pipeline, resulting in a significant reduction in airflow intensity; that is, the present solution can reduce the momentum loss caused by the interaction between the airflow and the solid particles, thereby ensuring that each position in the transport pipeline has a high average airflow intensity, thereby ensuring the transportation efficiency, cooling efficiency and drying efficiency of the solid particles.

[0008] Preferably, the axis of the air supply branch pipe is staggered with the axis of the transport pipeline, two adjacent air supply branch pipes are located at different positions along the circumference of the transport pipeline, and the air supply direction of each air supply branch pipe is distributed clockwise or counterclockwise along the circumference of the transport pipeline.

[0009] This solution enables the airflow in the transport pipeline to have both a speed along the circumference of the transport pipeline and a speed along the axial direction of the transport pipeline, thereby forming a spiral motion trajectory in the transport pipeline, and then driving the solid particles to move along the spiral trajectory in the transport pipeline; on the one hand, this can make the movement form of the solid particles more complex, so that the solid particles have a greater chance of tumbling, spreading out from each other, etc., which can enhance the interaction between the solid particles and the airflow, thereby improving the cooling efficiency and drying efficiency of the solid particles; on the other hand, it can also increase the actual movement distance of the solid particles in the transport pipeline without changing the length of the transport pipeline, so that the solid particles have more opportunities to interact with the airflow, thereby further improving the cooling efficiency and drying efficiency.

[0010] Preferably, the cross section of the transport pipeline is circular or elliptical.

[0011] This solution is conducive to forming a more stable spiral wind field in the transport pipeline.

[0012] Preferably, the number of blowers is at least two.

[0013] This solution enables at least two blowers to work in coordination, which can reduce the power requirement of a single blower, thereby reducing the difficulty of designing or selecting the blower.

[0014] Preferably, the outlet air temperature of the blower close to the feed structure is T1, and the outlet air temperature of the blower close to the discharge structure is T2, and T1 is greater than T2.

[0015] This solution uses two different air outlet temperatures near the feed structure and near the discharge structure, and the air outlet temperature near the feed structure is higher, while the air outlet temperature near the discharge structure is lower; on the one hand, hot air can be used to quickly dry the solid particles to avoid the solid particles sticking to each other and affecting the transportation efficiency, and then cold air can be used to cool the solid particles; on the other hand, the density difference between hot air and cold air can be used to generate local vortices at the mixing point of hot air and cold air, thereby driving the solid particles to tumble, further enhancing the interaction between the airflow and the solid particles, and thereby improving the cooling efficiency and drying efficiency.

[0016] Preferably, the diameter of the transport pipeline near the feed structure is D1, and the diameter of the transport pipeline near the discharge structure is D2, and D2 is greater than D1.

[0017] This solution makes the portion of the transport pipeline close to the discharge structure have a larger diameter. Then, when the airflow moves from a position close to the feed structure toward the discharge structure, according to Bernoulli's principle, due to the increase in the cross-sectional area of ​​the transport pipeline, the airflow will undergo adiabatic expansion, thereby causing the temperature of the gas to drop, which is beneficial for quickly converting the hot air blown out by the blower into cold air, avoiding its negative impact on the cooling of the solid particles, thereby ensuring the cooling efficiency of the solid particles; and this solution makes the diameter of the portion of the transport pipeline close to the discharge structure larger, which itself can increase the diameter of the spiral motion trajectory of the solid particles, thereby further increasing the movement distance of the solid particles in the transport pipeline, giving them more opportunities to interact with the airflow to obtain sufficient cooling.

[0018] Preferably, a temperature sensor is provided inside the transport pipeline, and the temperature sensor is used to detect the temperature of the air in the transport pipeline.

[0019] This solution can help workers monitor the air flow temperature in the transport pipeline in real time to avoid the situation where the temperature is too high and the solid particles melt.

[0020] Preferably, the transport pipeline is divided into at least two sections along its length direction, and each section includes at least one air supply port.

[0021] This solution divides the transport pipeline into multiple smaller segments with air outlets, which can reduce the difficulty of manufacturing the transport pipeline and is beneficial to achieving standardization of the transport pipeline segments. For example, each segment has the same shape, and the air supply branch pipe is arranged clockwise or counterclockwise only by rotating different segments to different positions during assembly.

[0022] This solution can also facilitate staff to assemble different numbers of segments according to actual conditions to meet different transportation needs.

[0023] Preferably, a filter is provided at the air outlet.

[0024] This solution can prevent solid particles from being blown into the air supply branch pipe.

[0025] In a second aspect, the present invention provides a solid particle production line, comprising a solid particle conveying device of the present invention.

[0026] The solid particle production line of the present scheme adopts the solid particle conveying device of the present invention to transport solid particles, which can ensure that each position in the transport pipeline has a high average airflow intensity, thereby ensuring the transportation efficiency, cooling efficiency and drying efficiency of the solid particles, without the need to increase the length of the transport pipeline to ensure the cooling effect and drying effect. Therefore, the present scheme can also reduce the land occupation of the transport pipeline and the factory land cost.

[0027] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a solid particle conveying device, in which at least two air supply ports are arranged at intervals on the side wall of a transport pipeline and connected to corresponding air supply branches and a blower, which can reduce the momentum loss caused by the interaction between the airflow and the solid particles, thereby ensuring that each position in the transport pipeline has a high average airflow intensity, thereby ensuring the transport efficiency, cooling efficiency and drying efficiency of the solid particles.

[0028] 2. The present invention provides a solid particle production line. By adopting the solid particle conveying device of the present invention to transport solid particles, it can ensure that each position in the transport pipeline has a high average airflow intensity, thereby ensuring the transportation efficiency, cooling efficiency and drying efficiency of the solid particles, without the need to increase the length of the transport pipeline to ensure the cooling effect and drying effect. Therefore, this solution can also reduce the land occupation of the transport pipeline and the factory land cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of a solid particle conveying device of Example 1; Figure 2 is a side cross-sectional structural schematic diagram of a solid particle conveying device of Example 1; Figure 3 is a partial three-dimensional structural schematic diagram of a transport pipeline of a solid particle transport device in Example 1; Figure 4 is a partial three-dimensional structural schematic diagram of a segment of a solid particle conveying device in Example 1; Figure 5 is a partial side cross-sectional structural schematic diagram of a transport pipeline of a solid particle transport device of Example 1; Figure 6 is from Figure 5 A-direction structural schematic diagram of the transport pipeline obtained in the direction indicated by the arrow A; Figure 7 is a schematic diagram of the three-dimensional structure of a solid particle conveying device of Example 2; Figure 8 is a schematic diagram of a partial three-dimensional structure of a transport pipeline of a solid particle transport device of Example 2; Fig. 9 A schematic diagram of a partial side cross-sectional structure of a transport pipeline of a solid particle conveying device of Example 2; Icons: 1-transport pipeline; 11-segment; 12-air outlet; 13-transition section; 2-feeding structure; 3-discharging structure; 4-air supply branch pipe; 5-blower; 6-filter. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0031] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0033] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0034] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0035] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0036] Example 1 like Figures 1 to 6 As shown, a solid particle conveying device comprises a transport pipeline 1, an air supply branch pipe 4 and a blower 5; one end of the transport pipeline 1 is connected to a feed structure 2, and the other end of the transport pipeline 1 is connected to a discharge structure 3; the side wall of the transport pipeline 1 is provided with at least two air supply ports 12, and the air supply ports 12 are spaced apart along the length direction of the transport pipeline 1; each air supply port 12 is connected to an air supply branch pipe 4, and the angle between the axis of the air supply branch pipe 4 and the axis of the transport pipeline 1 is greater than zero, and the air supply branch pipe 4 is inclined toward the direction where the feed structure 2 is located, so that the air supply direction of each air supply branch pipe 4 is obliquely toward the discharge structure 3; the blower 5 is connected to the end of the air supply branch pipe 4 away from the transport pipeline 1.

[0037] In the above embodiment, the solid particles include but are not limited to grain particles, bean particles, plastic particles, hot melt adhesive particles, and mineral particles.

[0038] In the above embodiment, the cross-sectional shape of the transport pipe 1 and the air supply branch pipe 4 can be any shape, including but not limited to circular, elliptical, polygonal, and square; and the transport pipe 1 and the air supply branch pipe 4 can be either straight pipes or curved.

[0039] In the above embodiment, the feed structure 2 includes but is not limited to a feed port, a feed slope, and a feed funnel; the discharge structure 3 includes but is not limited to a discharge port, a discharge slope, and a discharge funnel; and the blower 5 can directly adopt an existing product.

[0040] In an optional embodiment, the axis of the air supply branch pipe 4 is staggered from the axis of the transport pipeline 1, that is, the air supply direction of the air supply branch pipe 4 does not point to the axis of the transport pipeline 1, or the axis of the air supply branch pipe 4 is not in the same plane as the axis of the transport pipeline 1; and two adjacent air supply branch pipes 4 are located at different positions along the circumference of the transport pipeline 1, so that the air supply direction of each air supply branch pipe 4 is distributed in a clockwise or counterclockwise direction along the circumference of the transport pipeline 1. For example Figure 6 As shown, there are four air supply branch pipes 4 evenly spaced along the circumference of the transport pipeline 1, the angle between two adjacent air supply branch pipes 4 is 90°, and each air supply branch pipe 4 supplies air into the transport pipeline 1 in a clockwise direction, thereby forming a clockwise spiral wind field in the transport pipeline 1.

[0041] In an optional embodiment, if Figure 3 to Figure 4 As shown, the cross section of the transport pipeline 1 is circular or elliptical.

[0042] In an optional embodiment, each air supply branch pipe 4 can be connected to an independent blower 5 respectively, or a single blower 5 can be connected to two or more air supply branch pipes 4.

[0043] In an optional embodiment, the number of the blowers 5 is at least two.

[0044] In an optional embodiment, the outlet air temperature of the blower 5 near the feeding structure 2 is T1, and the outlet air temperature of the blower 5 near the discharging structure 3 is T2, and T1 is greater than T2. ​​The implementation includes but is not limited to: using a blower 5 with adjustable outlet air temperature; setting a temperature regulating structure, such as a heating coil or a cooling coil, at the outlet of the blower 5 or in the air supply branch pipe 4.

[0045] In an optional embodiment, a temperature sensor is provided inside the transport pipeline 1, and the temperature sensor is used to detect the temperature of the air in the transport pipeline 1. The temperature sensor can be provided in the air supply branch pipe 4 to reduce interference of solid particles on the measurement.

[0046] In an optional embodiment, the transport pipeline 1 is divided into at least two sections 11 along its length, and each section 11 includes at least one air supply port 12. Figure 3 to Figure 4 As shown, each segment 11 can include only one air outlet 12, thereby reducing the manufacturing difficulty of a single segment 11 and achieving standardization of the segments 11. Subsequently, it is only necessary to select a corresponding number of segments 11 for assembly according to the number of air outlets 12 required, and stagger the angles of two adjacent segments 11, so as to realize the production of the transport pipeline 1 without producing the transport pipeline 1 as an integral special-shaped part.

[0047] In an optional embodiment, the connection method between two adjacent segments 11 of the transport pipeline 1 includes, but is not limited to, welding, flange connection, threaded connection, and mortise and tenon connection.

[0048] In an optional embodiment, a filter screen 6 is provided at the air supply port 12, and the minimum pore size of the filter screen 6 is smaller than the diameter of the solid particles.

[0049] In an optional embodiment, the air supply openings 12 are distributed on the side elevations and / or top surfaces of the transport pipeline 1, that is, the air supply openings 12 avoid the bottom surface of the transport pipeline 1, thereby preventing solid particles from falling into the air supply branch pipe 4 under the action of gravity; for example Figure 6 As shown, the four air supply ports 12 are respectively distributed at the upper left, lower left, upper right, and lower right of the transport pipeline 1 .

[0050] Example 2 like Figures 7 to 9 As shown, based on Example 1, the diameter of the transport pipeline 1 near the feed structure 2 is D1, and the diameter of the transport pipeline 1 near the discharge structure 3 is D2, and D2 is greater than D1.

[0051] In the above embodiment, the specific manner in which the diameters of the two ends of the transport pipeline 1 change includes, but is not limited to, a gradual change in the diameter of the transport pipeline 1 along its length, a step-wise change in the diameter of the transport pipeline 1 along its length; for example Fig. 9 In the embodiment, the transport pipeline 1 includes two sections 11 with different diameters, the section 11 with a larger diameter is close to the discharge structure 3, and the section 11 with a smaller diameter is close to the feed structure 2, and the outlet air temperature of the blower 5 connected to the section 11 with a larger diameter is lower than the outlet air temperature of the blower 5 connected to the section 11 with a smaller diameter, thereby forming a situation in which hot air flows in the section 11 with a smaller diameter, which can quickly dry the solid particles, and cold air flows in the section 11 with a smaller diameter, which can quickly cool the solid particles; and once the hot air passes through the transition section 13, the hot air will undergo adiabatic expansion and quickly turn into cold air, which will not drag down the cooling efficiency of the solid particles.

[0052] In the above embodiment, a conical transition section 13 is further provided between the two segments 11 with different diameters to ensure a smooth transition between two adjacent segments 11 with different diameters and prevent the airflow from being obstructed at the point where the diameter suddenly changes.

[0053] Example 3 A solid particle production line comprises any one of the solid particle conveying devices in embodiments 1 to 2.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid particle conveying device, characterized in that: include: A transport pipeline (1), one end of the transport pipeline (1) being connected to a feed structure (2), and the other end of the transport pipeline (1) being connected to a discharge structure (3); at least two air supply ports (12) are provided on a side wall of the transport pipeline (1), and the air supply ports (12) are spaced apart along the length direction of the transport pipeline (1); an air supply branch pipe (4), the number of the air supply branch pipes (4) matching the number of the air supply ports (12), one end of the air supply branch pipe (4) being connected to the air supply port (12); an angle between an axis of the air supply branch pipe (4) and an axis of the transport pipeline (1) being greater than zero, and the air supply branch pipe (4) being inclined in the direction of the feed structure (2); A blower (5), the blower (5) being connected to an end of the air supply branch pipe (4) away from the transport pipeline (1).

2. A solid particle conveying device according to claim 1, characterized in that: The axis of the air supply branch pipe (4) is staggered from the axis of the transport pipeline (1); two adjacent air supply branch pipes (4) are located at different positions along the circumference of the transport pipeline (1); and the air supply direction of each air supply branch pipe (4) is distributed in a clockwise or counterclockwise direction along the circumference of the transport pipeline (1).

3. A solid particle conveying device according to claim 2, characterized in that: The cross section of the transport pipeline (1) is circular or elliptical.

4. A solid particle conveying device according to claim 1, characterized in that: The number of the blowers (5) is at least two.

5. A solid particle conveying device according to claim 4, characterized in that: The air outlet temperature of the blower (5) close to the feed structure (2) is T1, and the air outlet temperature of the blower (5) close to the discharge structure (3) is T2, and T1 is greater than T2.

6. A solid particle conveying device according to claim 5, characterized in that: The diameter of the transport pipeline (1) near the feed structure (2) is D1, and the diameter of the transport pipeline (1) near the discharge structure (3) is D2, and D2 is greater than D1.

7. A solid particle conveying device according to any one of claims 1 to 6, characterized in that: A temperature sensor is arranged inside the transport pipeline (1), and the temperature sensor is used to detect the temperature of the air in the transport pipeline (1).

8. A solid particle conveying device according to any one of claims 1 to 6, characterized in that: The transport pipeline (1) is divided into at least two sections (11) along its length direction, and each section (11) comprises at least one air supply port (12).

9. A solid particle conveying device according to any one of claims 1 to 6, characterized in that: A filter screen (6) is provided at the air supply port (12).

10. A solid particle production line, characterized in that: The invention comprises a solid particle conveying device as claimed in any one of claims 1 to 9.

Images