Industrial fan exhaust duct

Abstract

The utility model relates to the technical field of exhaust duct, concretely to an industrial fan exhaust duct, including the bellows, the both ends of bellows all are established with thread groove, the both ends of bellows all are threadedly connected with the butt joint pipe, the one end of butt joint pipe is provided with the screw tooth, the screw tooth with thread groove forms the thread connection, the circumferential outer wall of butt joint pipe is provided with universal adjusting assembly, the one end of butt joint pipe away from bellows is fixedly connected with the flange disc. In the utility model, the high frequency vibration produced in the operation of fan can be effectively absorbed through the elastic deformation of bellows, the vibration amplitude and noise of pipeline system are reduced, the synergies of bellows and universal adjusting assembly can compensate the axial, transverse and angular thermal displacement of pipeline caused by high temperature flue gas and other medium, prevent the deformation and rupture of pipeline, and the back -to -back linkage structure of universal adjusting assembly can adapt to the multi -angle installation demand in the complex layout of exhaust duct, reduce the stress concentration of installation.

Description

Technical Field

[0001] This utility model relates to the field of exhaust duct technology, specifically an industrial fan exhaust duct. Background Technology

[0002] In industrial fan exhaust systems, exhaust ducts must withstand high-frequency vibrations generated by fan operation and temperature fluctuations caused by the transported medium (such as high-temperature flue gas) over a long period of time.

[0003] Traditional industrial fan exhaust ducts mostly employ rigid connection structures. Their core drawback lies in the lack of an effective multi-dimensional compensation mechanism when the ducts experience axial, lateral, and angular displacement due to vibration or thermal expansion and contraction. This easily leads to loosening, deformation, or even breakage at duct connections, resulting in reduced air leakage efficiency and safety hazards. While some existing ducts incorporate simple compensation structures, their singular linkage mechanism cannot simultaneously handle complex displacement conditions, becoming a key issue restricting the stability of the exhaust system. Therefore, a new type of industrial fan exhaust duct is urgently needed to solve these problems. Utility Model Content

[0004] In view of the shortcomings of the prior art mentioned in the background, the present invention provides an industrial fan exhaust duct.

[0005] This utility model overcomes the above technical problems by adopting the following technical solution:

[0006] An industrial fan exhaust duct includes a corrugated pipe with threaded grooves at both ends. Both ends of the corrugated pipe are threaded to a connecting pipe. One end of the connecting pipe is provided with a thread, which forms a threaded connection with the threaded groove. A universal adjustment component is provided on the outer circumference of the connecting pipe.

[0007] Preferably, a flange is fixedly connected to the end of the connecting pipe away from the bellows, and the outer circumferential wall of the flange has assembly holes that are evenly spaced and distributed in a circle.

[0008] Preferably, the universal adjustment assembly includes a fixed plate fixedly connected to the outer circumferential wall of the connecting pipe. There are two sets of fixed plates, with the two fixed plates located at both ends of the bellows. A rotating assembly is provided on one side of the fixed plate. There are four sets of rotating assemblies, with each of the four sets of rotating assemblies rotatably connected to a first movable plate and a second movable plate in pairs.

[0009] Preferably, the rotating assembly includes a rotating seat and a rotating shaft, the rotating shaft being rotatably connected to the rotating seat, and the rotating seat being fixedly connected to one side of the outer wall of the fixed plate.

[0010] Preferably, either the first movable plate or the second movable plate is fixedly connected to the rotating shaft, and the rotating shaft passes through the middle of the first movable plate or the second movable plate respectively.

[0011] Preferably, the first movable plate and the second movable plate are arranged in a U-shape on the outer wall of the corrugated pipe.

[0012] Preferably, both ends of the first movable plate are provided with slots, and both ends of the second movable plate are fixedly connected with protrusions. The second movable plate is engaged and fixed with the first movable plate by engaging the protrusions in the slots.

[0013] By adopting the above structure, this utility model has the following advantages compared with the prior art: the elastic deformation of the corrugated pipe can effectively absorb the high-frequency vibration generated by the operation of the fan, reducing the vibration amplitude and noise of the pipeline system. At the same time, the synergistic effect of the corrugated pipe and the universal adjustment component can compensate for the axial, lateral and angular thermal displacement of the pipeline caused by high-temperature flue gas and other media, preventing the pipeline from deforming and breaking. The U-shaped linkage structure of the universal adjustment component can adapt to the multi-angle installation requirements in the complex layout of the exhaust duct, reducing the concentration of installation stress. Finally, the double sealing design of the threaded connection and the flange, combined with the stable support of the movable plate, can effectively prevent air leakage caused by displacement or vibration. The detachable threaded connection facilitates on-site installation and maintenance. The overall structural design reduces stress concentration and fatigue wear, extends the service life of the exhaust duct under high vibration and large temperature difference conditions, and improves the operational stability and reliability of the industrial fan exhaust system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a front structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram showing the disassembled universal adjustment component of this utility model.

[0017] Figure 4 This is a schematic diagram of the overall semi-sectional structure of this utility model.

[0018] In the diagram: 1. Connecting pipe; 2. Flange; 3. Fixing plate; 4. Bellows; 5. Rotating assembly; 501. Rotating seat; 502. Rotating shaft; 6. First movable plate; 7. Second movable plate; 8. Protrusion; 9. Slot; 10. Assembly hole; 11. Threaded groove; 12. Thread. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 In this embodiment of the utility model, an industrial fan exhaust duct includes a corrugated pipe 4, both ends of which are provided with threaded grooves 11. Both ends of the corrugated pipe 4 are threadedly connected to a connecting pipe 1. One end of the connecting pipe 1 is provided with a thread 12, which forms a threaded connection with the threaded groove 11. A universal adjustment component is provided on the outer circumference of the connecting pipe 1. Through the convenience of the threaded connection, the elastic compensation of the corrugated pipe 4, and the multi-directional adaptability of the universal adjustment component, the installation efficiency, compensation accuracy, and structural stability of the expansion joint are significantly improved. It can be widely used in working conditions that require dealing with complex pipeline displacement, reducing the failure risk of the pipeline system and extending its service life.

[0021] Furthermore, a flange 2 is fixedly connected to the end of the connecting pipe 1 away from the bellows 4. The outer circumference of the flange 2 is provided with equidistant circularly distributed assembly holes 10, which can be fixedly connected to the pipeline through the flange 2 and the assembly holes 10 to ensure a stable connection between the expansion joint and the pipeline.

[0022] Furthermore, the universal adjustment assembly includes a fixed plate 3 fixedly connected to the outer circumference of the connecting pipe 1. There are two sets of fixed plates 3, with the two fixed plates 3 located at both ends of the bellows 4. A rotating assembly 5 is provided on one side of the fixed plate 3. There are four sets of rotating assemblies 5, with the four sets of rotating assemblies 5 rotatably connected to the first movable plate 6 and the second movable plate 7 in pairs.

[0023] Furthermore, the rotating assembly 5 includes a rotating seat 501 and a rotating shaft 502. The rotating shaft 502 is rotatably connected to the rotating seat 501, and the rotating seat 501 is fixedly connected to one side of the outer wall of the fixed plate 3.

[0024] Furthermore, the first movable plate 6 or the second movable plate 7 is fixedly connected to the rotating shaft 502. The rotating shaft 502 passes through the middle of the first movable plate 6 or the second movable plate 7 respectively. Since the fixed plate 3 is fixed to the outer wall of the connecting pipe 1, the rotating seat 501 of the rotating assembly 5 cooperates with the rotating shaft 502, so that the first movable plate 6 and the second movable plate 7 can rotate around the rotating shaft 502, which facilitates the displacement change of the subsequent pipeline.

[0025] Furthermore, the first movable plate 6 and the second movable plate 7 are arranged in a U-shape on the outer wall of the corrugated pipe 4. Both ends of the first movable plate 6 are provided with slots 9, and both ends of the second movable plate 7 are fixedly connected with protrusions 8. The second movable plate 7 is engaged with the first movable plate 6 by engaging in the slots 9 through the protrusions 8. The U-shape arrangement and engagement with the slots 9 through the protrusions 8 form a flexible and stable linkage structure, which can adapt to the displacement changes of the pipeline in multiple directions (such as axial, lateral, and angular directions). Through the rotation and engagement adjustment of the movable plates, the displacement of the pipeline is converted into multi-angle deformation of the expansion joint, thereby effectively compensating for the complex displacement of the pipeline and avoiding damage to the pipeline due to excessive displacement.

[0026] Working principle: When the industrial fan exhaust duct is working, the two ends of the corrugated pipe 4 are connected to the threaded pipe 1 1 by the threaded groove 11. This detachable structure facilitates on-site installation and maintenance. At the same time, the elastic material of the corrugated pipe 4 can absorb the high-frequency vibration generated by the fan operation and the axial thermal displacement caused by the high-temperature flue gas, reducing the stress concentration of the pipeline system.

[0027] Meanwhile, the end of the connecting pipe 1 furthest from the bellows 4 is fixedly connected to the fan outlet or main pipeline through the flange 2 and the assembly hole 10, and a high airtightness connection is achieved with the help of the sealing gasket. In the universal adjustment assembly, the fixing plate 3 is fixed to the outer wall of the connecting pipe 1. The rotating seat 501 of the rotating assembly 5 cooperates with the rotating shaft 502 to allow the first movable plate 6 and the second movable plate 7 to rotate around the axis. The two are distributed in a U-shape and are engaged with the protrusion 8 and the slot 9 to form a flexible and stable linkage structure. It can adapt to the lateral displacement of the exhaust duct caused by fan vibration, the angular thermal deformation caused by high temperature medium, and the installation angle deviation in complex layout. Through the rotation and engagement adjustment of the movable plate, the displacement of the pipeline is converted into the multi-angle deformation of the bellows, thereby compensating for vibration and thermal displacement and avoiding deformation and cracking of the pipeline due to stress concentration. At the same time, the double sealing design of the threaded connection and the flange combined with the support of the movable plate can effectively prevent air leakage and improve the operational stability and service life of the exhaust system.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. An industrial fan exhaust duct, comprising a corrugated pipe (4), characterized in that, Both ends of the corrugated pipe (4) are provided with threaded grooves (11), and both ends of the corrugated pipe (4) are threadedly connected to connecting pipes (1). One end of the connecting pipe (1) is provided with threads (12), and the threads (12) and the threaded grooves (11) form a threaded connection. A universal adjustment assembly is provided on the outer circumference of the connecting pipe (1). The universal adjustment assembly includes a fixing plate (3) fixedly connected to the outer circumference of the connecting pipe (1). There are two sets of fixing plates (3), and the two fixing plates (3) are located at both ends of the corrugated pipe (4). A rotating assembly (5) is provided on one side of the fixing plate (3). The number of rotating components (5) is four sets. The four sets of rotating components (5) are rotatably connected to the first movable plate (6) and the second movable plate (7) in pairs. The rotating component (5) includes a rotating seat (501) and a rotating shaft (502). The rotating shaft (502) is rotatably connected to the rotating seat (501). The rotating seat (501) is fixedly connected to the outer wall of one side of the fixed plate (3). The first movable plate (6) or the second movable plate (7) is fixedly connected to the rotating shaft (502). The rotating shaft (502) passes through the middle of the first movable plate (6) or the second movable plate (7).

2. The industrial fan exhaust duct according to claim 1, characterized in that, The end of the connecting pipe (1) away from the bellows (4) is fixedly connected to a flange (2), and the outer circumferential wall of the flange (2) is provided with equidistant circularly distributed assembly holes (10).

3. An industrial fan exhaust duct according to claim 2, characterized in that, The first movable plate (6) and the second movable plate (7) are arranged in a U-shape on the outer wall of the corrugated pipe (4).

4. An industrial fan exhaust duct according to claim 3, characterized in that, Both ends of the first movable plate (6) are provided with slots (9), and both ends of the second movable plate (7) are fixedly connected with protrusions (8). The second movable plate (7) is engaged with the first movable plate (6) by the protrusions (8) in the slots (9).

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