Heating function pneumatic conveying pipeline

Abstract

This utility model relates to the field of pipeline technology, specifically a pneumatic conveying pipeline with heating function. It includes an inner pipe, with an outer pipe sleeved around the inner pipe. The gap between the inner and outer pipes is used to convey hot air. Plug rings are inserted into the gaps at both ends of both the outer and inner pipes, and the plug rings are fixed to the surface of a connecting plate. The surface of the connecting plate has bolt holes and multiple through holes, two sets of which are penetrated by the connecting pipe. Nuts are screwed to both ends of the connecting pipe. The beneficial effect is that by sleeved with an outer pipe around the inner pipe and creating a gap between them for conveying hot air, the hot air can directly envelop the inner pipe, providing all-round and uniform heating to the material conveyed inside. This heating method can quickly reduce the moisture content of the material, effectively achieving auxiliary drying and greatly improving the efficiency and quality of material drying. It is especially suitable for conveying materials that are sensitive to humidity or require drying treatment.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, specifically a pneumatic conveying pipeline with heating function. Background Technology

[0002] In industrial production, pneumatic conveying, as a highly efficient and flexible material handling method, is widely used in various industries such as chemical, food, and pharmaceutical. Pneumatic conveying uses the power of gas (usually air) to transport solid particles or powdered materials from one location to another, offering advantages such as long conveying distance, large conveying capacity, and ease of automation control.

[0003] However, in traditional pneumatic conveying processes, for some humidity-sensitive or drying-required materials, the moisture content may increase during transport due to factors such as ambient humidity and the material's inherent characteristics, thus affecting the material's quality and performance. For example, in the food industry, high humidity can cause food to clump and spoil; in the chemical industry, humidity can affect the efficiency of chemical reactions and product quality.

[0004] To address this issue, the industry has attempted to dry materials by wrapping heating devices around the outside of the conveying pipeline. However, this method has many drawbacks, such as complex installation of the heating devices, large space occupation, low heat transfer efficiency, and difficulty in achieving uniform heating, resulting in unsatisfactory drying effects and increasing equipment costs and maintenance difficulties.

[0005] In addition, the sealing performance at the joints of traditional pneumatic conveying pipelines is a problem that urgently needs to be solved. If the pipeline joints are not sealed properly, it will not only lead to hot air leakage and reduce drying efficiency, but may also allow external moisture to enter the pipeline, further affecting the drying effect of the material, and may even cause safety accidents.

[0006] Therefore, developing a pneumatic conveying pipeline with heating function and good sealing performance is of great practical significance. Utility Model Content

[0007] The purpose of this invention is to provide a pneumatic conveying pipeline with heating function to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic conveying pipe with heating function, including an inner pipe, an outer pipe sleeved on the outside of the inner pipe, a gap between the inner and outer pipes for conveying hot air, a plug ring inserted into the gap at both ends of the outer and inner pipes, the plug rings being fixed to the surface of a connecting plate, bolt holes being opened on the surface of the connecting plate, multiple through holes being opened on the surface of the connecting plate, two sets of through holes being penetrated by a connecting pipe, and nuts being screwed to both ends of the connecting pipe.

[0009] Preferably, the lengths of the outer tube and the inner tube are equal, and an air injection pipe and a pressure relief valve are installed on the surface of the outer tube.

[0010] Preferably, the through hole is a "convex"-shaped round hole, the through hole penetrates through the plug ring and the connecting plate, the end of the connecting pipe and the nut are both in the through hole, and external threads are provided on the outer walls at both ends of the connecting pipe, and the external threads are in threaded connection with the screw threads of the nut.

[0011] Preferably, an inner ring groove is formed in the inner ring opening on the side of the connecting plate away from the plug ring, a first sealing ring is fixed inside the inner ring groove, and the thickness of the first sealing ring is greater than the depth of the inner ring groove.

[0012] Preferably, an embedding groove is formed on the side of the connecting plate away from the plug ring, a second sealing ring is fixed inside the embedding groove, and the thickness of the second sealing ring is greater than the depth of the embedding groove.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The heating function pneumatic conveying pipeline proposed by the present utility model slews an outer tube outside the inner tube, and a gap is formed between the two for conveying hot air. The hot air can directly wrap the inner tube and heat the materials conveyed inside the inner tube in an all-round and uniform manner. This heating method can quickly reduce the moisture content of the materials, effectively achieve auxiliary drying, greatly improve the efficiency and quality of material drying, and is especially suitable for the conveying of materials sensitive to humidity or requiring drying treatment.

[0014] The connecting plate acts as a flange. When the two sets of pipelines are connected end to end, the two connecting plates are placed close together and locked by bolts passing through the bolt holes. At this time, the two connecting plates clamp the first sealing ring and the second sealing ring on the inner side. Since the thickness of the first sealing ring is greater than the depth of the inner ring groove and the thickness of the second sealing ring is greater than the depth of the embedding groove, this design enables the sealing rings to fit tightly, effectively preventing hot air leakage and external moisture from entering, greatly improving the sealing performance at the pipeline connection, and ensuring the drying effect of the materials and the safe and stable operation of the conveying system.

[0015] By reasonably designing the layout of the through hole and the connecting pipe, it is ensured that after the two sets of pipelines are connected end to end, the remaining through holes are connected, which can meet the connection of the gaps between the inner tubes and the outer tubes of the two sets of pipelines. An air injection pipe is installed on the outer tube of the pipeline at the end, and the hot air conveying pipe is connected to the air injection pipe, and the hot air can be smoothly conveyed in the gaps between each section of the pipeline, ensuring the circulation and uniform distribution of hot air in the entire conveying system and providing a stable heat source for the drying of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model; Figure 2 is a side view of the structure of the present utility model; Figure 3 for Figure 2 Sectional view of the structure at point AA; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 2 Structural cross-section view at point BB; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B.

[0017] In the diagram: Inner pipe 1, outer pipe 2, air injection pipe 3, pressure relief valve 4, plug ring 5, connecting plate 6, bolt hole 7, inner ring groove 8, insert groove 9, sealing ring one 10, sealing ring two 11, through hole 12, connecting pipe 13, nut 14. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this 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 only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Please see Figures 1 to 6 This utility model provides a technical solution: a pneumatic conveying pipeline with heating function, including an inner pipe 1, an outer pipe 2 sleeved on the outside of the inner pipe 1, the gap between the inner pipe 1 and the outer pipe 2 for conveying hot air, the outer pipe 2 and the inner pipe 1 having the same length, an air injection pipe 3 and a pressure relief valve 4 installed on the surface of the outer pipe 2; a plug ring 5 is inserted into the gap at both ends of the outer pipe 2 and the inner pipe 1, the plug ring 5 is fixed to the surface of the connecting plate 6, the surface of the connecting plate 6 has bolt holes 7; an inner ring groove 8 is formed at the inner ring opening on the side of the connecting plate 6 away from the plug ring 5, a sealing ring 10 is fixed inside the inner ring groove 8, the thickness of the sealing ring 10 is greater than the depth of the inner ring groove 8; an embedding groove 9 is formed on the side of the connecting plate 6 away from the plug ring 5, a sealing ring 2 11 is fixed inside the embedding groove 9, the thickness of the sealing ring 2 11 is greater than the depth of the embedding groove 9.

[0020] After inserting the plug ring 5 into the gap between the inner pipe 1 and the outer pipe 2, weld the joint between the connecting plate 6 and the outer pipe 2 together to improve the firmness of the connecting plate 6 installed on one side of the outer pipe 2. The connecting plate 6 is used as a flange. That is, when the two sets of pipes are connected end to end, put the two sets of connecting plates 6 together, pass the bolt through the bolt holes 7 on the surface of the two sets of connecting plates 6 and lock them. At this time, the two sets of connecting plates 6 clamp the two sets of sealing rings 10 and 11 on the inner side, improving the sealing performance after the two sets of pipes are connected.

[0021] The surface of the connecting plate 6 has multiple through holes 12. Two sets of through holes 12 are penetrated by the connecting tube 13. Nuts 14 are screwed to both ends of the connecting tube 13. The through holes 12 are convex-shaped round holes. The through holes 12 penetrate the plug ring 5 and the connecting plate 6. The end of the connecting tube 13 and the nut 14 are both in the through holes 12. Both ends of the connecting tube 13 have external threads on their outer walls. The external threads are connected to the threaded openings of the nut 14. After the plug ring 5 is inserted into the gap between the inner tube 1 and the outer tube 2, the two connecting pipes 13 are passed through the two sets of through holes 12 respectively. Then, the nut 14 is screwed onto the end of the connecting pipe 13 and locked. At this time, the two connecting discs 6 are tightly pressed against the two ends of the outer tube 2, realizing the pre-fixation of the connecting discs 6. Only the connecting pipes 13 are installed inside the two sets of through holes 12 to ensure that after the two pipes are connected end to end, the remaining through holes 12 are connected to satisfy the gap between the inner tube 1 and the outer tube 2 of the two sets of pipes. The air injection pipe 3 is installed on the outer tube 2 of the pipe at the end. The hot air conveying pipe is connected to the air injection pipe 3. When the hot air is conveyed between the inner tube 1 and the outer tube 2, the hot air wraps around the inner tube 1, which is conducive to the auxiliary drying of the material conveyed inside the inner tube 1. The pressure relief valve 4 is used for emergency pressure relief.

[0022] The method of using this pneumatic conveying pipeline with heating function is as follows: Insert the plug ring 5 into the gap between the inner tube 1 and the outer tube 2, ensuring that the plug ring 5 is accurately positioned. Multiple "U"-shaped through holes 12 are formed on the surface of the connecting plate 6, and the through holes 12 penetrate the plug ring 5 and the connecting plate 6. Pass two connecting pipes 13 through the two sets of through holes 12 respectively; both ends of the connecting pipes 13 have external threads. Fit the nuts 14 onto the ends of the connecting pipes 13 and screw them in, so that the two connecting plates 6 are tightly pressed against both ends of the outer tube 2, achieving pre-fixation of the connecting plate 6 installation. Weld the joint between the connecting plate 6 and the outer tube 2 together to enhance the firmness of the connecting plate 6 installed on one side of the outer tube 2. When it is necessary to connect the two sets of pipes end to end, place the connecting plates 6 of the two sets of pipes together, ensuring that the bolt holes 7 of the two sets of connecting plates 6 are aligned. Pass the bolts through the aligned bolt holes 7 on the surfaces of the two sets of connecting plates 6, and then tighten the bolts with nuts. During the locking process, the two sets of connecting discs 6 clamp the two sets of sealing rings 10 and 11 on the inner side. Sealing ring 10 is fixed inside the inner ring groove 8, and its thickness is greater than the depth of the inner ring groove 8. Sealing ring 11 is fixed inside the embedding groove 9, and its thickness is greater than the depth of the embedding groove 9, thereby improving the sealing performance after the two sets of pipes are connected. This ensures that the remaining through holes 12 are connected after the two sets of pipes are connected, allowing for the connection of the gap between the inner pipe 1 and the outer pipe 2. An injection pipe 3 is installed on the outer pipe 2 at the end of the pipe. A hot gas delivery pipe is connected to the injection pipe 3, allowing hot gas to enter and be delivered through the gap between the inner pipe 1 and the outer pipe 2. At this time, the hot gas surrounds the inner pipe 1, which can assist in drying the material conveyed inside the inner pipe 1. When the pressure inside the pipe is too high, an emergency pressure relief valve 4 can be used to ensure the safe operation of the pipeline.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heated functional pneumatic conveying pipe comprising an inner pipe (1), characterised in that: An outer tube (2) is sleeved outside the inner tube (1). The gap between the inner tube (1) and the outer tube (2) is used for conveying hot air. Plug rings (5) are inserted into the gaps at both ends between the outer tube (2) and the inner tube (1). The plug rings (5) are fixed on the surface of the connecting plate (6). Bolt holes (7) are formed on the surface of the connecting plate (6). A plurality of through holes (12) are formed on the surface of the connecting plate (6). Two groups of through holes (12) are penetrated by a connecting pipe (13). Nuts (14) are screwed at both ends of the connecting pipe (13).

2. A heated functional pneumatic conveying pipe according to claim 1, characterized in that: The tube bodies of the outer tube (2) and the inner tube (1) are of equal length. An air injection pipe (3) and a pressure relief valve (4) are installed on the surface of the outer tube (2).

3. A heated functional pneumatic conveying duct according to claim 2, wherein: The through hole (12) is a "convex"-shaped round hole. The through hole (12) penetrates through the plug ring (5) and the connecting plate (6). The ends of the connecting pipe (13) and the nuts (14) are both located in the through hole (l2). External threads are provided on the outer walls at both ends of the connecting pipe (13). The external threads are in mating connection with the screw threads of the nuts (14).

4. A heated functional pneumatic conveying duct according to claim 1, characterized in that: An inner ring groove (8) is formed at the inner ring opening on the side of the connecting plate (6) away from the plug ring (5). A first sealing ring (10) is fixed inside the inner ring groove (8). The thickness of the first sealing ring (10) is greater than the depth of the inner ring groove (8).

5. A heated functional pneumatic conveying duct according to claim 1, characterized in that: A mounting groove (9) is formed on the side of the connecting plate (6) away from the plug ring (5). A second sealing ring (11) is fixed inside the mounting groove (9). The thickness of the second sealing ring (11) is greater than the depth of the mounting groove (9).

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