Modular quick-fit ventilation duct

Abstract

The utility model relates to modularization quick -mounting type ventilation pipeline belongs to pipeline connection technical field, including axial flow fan, flexible pipeline, square -round connection pipe, ventilation square tube, connecting flange no.

Description

Technical Field

[0001] This utility model relates to modular quick-installation ventilation ducts and belongs to the field of duct connection technology. Background Technology

[0002] Ventilation ducts are an important component of ventilation and air conditioning systems in industrial and civil buildings, primarily used for air transport and distribution. Currently, ventilation ducts on the market are typically installed with axial flow fans using the traditional flange bolt connection method. This requires inserting each bolt into the flange hole and then tightening the nut for fixation, which is quite laborious. Moreover, disassembly for subsequent maintenance is equally cumbersome, time-consuming, and labor-intensive.

[0003] Meanwhile, the sealing performance of the connection parts of traditional square ventilation ducts is often poor and they lack positioning structures. When two ducts are connected, they are prone to vertical misalignment, which affects the efficiency of duct installation and connection. In addition, the noise at the connection point is relatively large. Utility Model Content

[0004] This utility model provides a modular quick-installation ventilation duct, which solves the problems existing in the above-mentioned background technology.

[0005] This utility model relates to a modular quick-installation ventilation duct, including flexible ducts connected to both ends of an axial flow fan. The flexible ducts at both ends are connected to square-to-round connecting pipes. Multiple ventilation square pipes are connected to the outer ends of the square-to-round connecting pipes. Connecting flange one is fixed to both ends of the flexible ducts. Connecting flange two is provided at both ends of the axial flow fan. Connecting flange three is provided at both ends of the square-to-round connecting pipes and the ventilation square pipes. Multiple connecting studs are evenly fixed to the outer wall of connecting flange one, and locking nuts are provided on the connecting studs. Connecting flange two and connecting flange three near the axial flow fan end of the square-to-round connecting pipe have through holes for the locking nuts to pass through. The through holes are connected to arc-shaped slotted holes that mate with the connecting studs. Connecting inserts extending into their inner holes are provided between adjacent ventilation square pipes and between the ventilation square pipe and the square-to-round connecting pipe. A fixing flange is fixed to the outer middle of the connecting insert. Quick-installation fixing clamps are provided on the outer sides of connecting flange three and the fixing flange.

[0006] As a preferred option, the quick-install fixing clamp includes two U-shaped frame pieces. The inner walls of the frame pieces are provided with clamping grooves to accommodate and clamp the connecting flange and the fixing flange. The connecting ends of the two frame pieces are provided with connecting flanges, and locking bolts are provided on the connecting flanges. The U-shaped frame pieces, together with the clamping grooves, can quickly position and clamp the connecting flange and the fixing flange. Fixing is completed by the locking bolts on the connecting flanges. The operation is convenient and further improves the installation efficiency. At the same time, the clamping structure ensures the tightness of the connection.

[0007] As a preferred embodiment, square elastic sealing gaskets are provided on both sides of the fixed flange, and sealing washers are provided between connecting flange one and connecting flange two, and between connecting flange two and the circular connecting flange three. The sealing washers are located inside the strip-shaped holes. The elastic sealing gaskets and sealing washers can effectively fill the gaps at each connection point, reduce air leakage, and ensure ventilation.

[0008] As a preferred embodiment, the inner holes at both ends of the connecting tube are provided with tapered guide cones. The tapered guide cones can guide the airflow to transition smoothly between the pipe and the connecting tube, reducing airflow impact and disturbance, and lowering wind resistance.

[0009] As a preferred option, the outer sides of both ends of the connecting tube are provided with rounded, smooth transition chamfers to facilitate the insertion of the connecting tube.

[0010] As a preferred embodiment, a limiting hole is provided on the inner side of the connecting flange corresponding to one of the perforations, a limiting pin is provided in the limiting hole, a disc-shaped limiting cap is provided on the inner end of the limiting pin, and the outer end of the limiting pin extends into the perforation.

[0011] As a preferred option, the limiting pin and the through hole are interference fit, with the outer end of the limiting pin inside the through hole. The limiting pin can be inserted into the limiting hole and the through hole after the locking nut on the connecting stud is installed and tightened, to prevent the connecting stud from coming out.

[0012] This utility model has the following beneficial effects: The flexible duct, axial flow fan, and square-to-round connecting pipe all adopt a structure of connecting studs with through holes and slotted holes. During installation, the lock nut can be pre-screwed into the connecting stud, then the lock nut is passed through the through hole, and the flexible duct is rotated to rotate the connecting stud into the slotted hole. Finally, the lock nut is tightened, which can quickly complete the installation and is also convenient and quick to disassemble. In addition, the connection between the ventilation square duct and the square-to-round connecting pipe is positioned and installed by the connecting insert, which prevents misalignment at the connection when the quick-install fixing clamp is fixed. Furthermore, the setting of the connecting insert can improve the noise reduction effect at the connection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 for Figure 1 Partial structural diagram; Figure 3 for Figure 1 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the side structure of connecting flange two; Figure 5 This is a schematic diagram of the side structure of the frame component; In the diagram: 1. Axial flow fan; 2. Limit cap; 3. Connecting stud; 4. Connecting flange one; 5. Connecting flange two; 6. Flexible duct; 7. Elastic sealing gasket; 8. Square to round connecting pipe; 9. Ventilation square duct; 10. Connecting flange; 11. Frame; 12. Connecting insert; 13. Fixing flange; 14. Connecting flange three; 15. Perforation; 16. Strip hole; 17. Clamping groove. Detailed Implementation

[0014] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0015] Example 1, as Figures 1 to 5 As shown, this utility model is a modular quick-installation ventilation duct, including flexible pipes 6 connected to both ends of an axial flow fan 1. The flexible pipes 6 at both ends are connected to square-to-round connecting pipes 8. Multiple sections of ventilation square pipes 9 are connected to the outer ends of the square-to-round connecting pipes 8. Connecting flanges 1-4 are fixed to both ends of the flexible pipes 6. Connecting flanges 2-5 are provided at both ends of the axial flow fan 1. Connecting flanges 3-14 are provided at both ends of the square-to-round connecting pipes 8 and the ventilation square pipes 9. Multiple connecting studs 3 are evenly fixed to the outer wall of the connecting flanges 1-4. The connecting studs 3... A locking nut is provided. The connecting flange 2 5 and the square to round connecting pipe 8 are provided with a through hole 15 on the connecting flange 3 14 near the axial flow fan 1. The through hole 15 is connected to an arc-shaped strip hole 16 that mates with the connecting stud 3. Connecting tubes 12 that extend into their inner holes are provided between adjacent ventilation square pipes 9 and between ventilation square pipes 9 and square to round connecting pipe 8. A fixing flange 13 is fixed on the outer side of the middle of the connecting tube 12. Quick-install fixing clamps are provided on the outer side of the connecting flange 3 14 and the fixing flange 13.

[0016] During installation, the axial flow fan 1 is installed in a fixed position using a lifting device. Then, the locking nut is inserted into the connecting stud 3 on the ground below. The square-to-round connecting pipes 8 on both sides are then lifted and fixed in the installation position. The flexible pipe 6 is placed between the square-to-round connecting pipe 8 and the axial flow fan 1. The locking nuts on the connecting studs 3 at both ends are then passed through the corresponding through holes 15 and rotated so that the connecting studs 3 enter the strip holes 16. The locking nuts are then tightened. One end of the connecting tube 12 is then inserted into the square end of the square-to-round connecting pipe 8. The corresponding ventilation square tube 9 is then inserted, positioning and connecting the ventilation square tubes 9 and the square-to-round connecting pipe 8 on both sides. Finally, the connection is quickly fixed using quick-release fixing clamps.

[0017] In Example 2, based on Example 1, the quick-install fixing clamp includes two U-shaped frame pieces 11. The inner wall of each frame piece 11 has a clamping groove 17 to accommodate the clamping connecting flange 3 14 and the fixing flange 13. The connecting end of the two frame pieces 11 has a connecting flange 10, on which a locking bolt is provided. After the connecting tube 12 is inserted into place, the fixing flange 13 contacts the square connecting flange 3 14 on both sides. Then, the clamping groove 17 of the U-shaped frame piece 11 is clamped onto the outside of the connecting flange 3 14 and the fixing flange 13, and then locked in place using the locking bolt.

[0018] Both sides of the fixed flange 13 are provided with square elastic sealing gaskets 7. Sealing gaskets are provided between connecting flange 1 4 and connecting flange 2 5, and between connecting flange 2 5 and the circular connecting flange 3 14. The sealing gaskets are located inside the strip hole 16. Before the connecting tube 12 is inserted, the elastic sealing gaskets 7 are now put on the outside of both sides of the connecting tube 12.

[0019] The inner holes at both ends of the connecting tube 12 are provided with tapered guide cone surfaces. The connecting flange 14 of the square-to-round connecting tube 8, which is near the axial flow fan 1, is round, and the other end is square.

[0020] The outer sides of both ends of the connecting cannula 12 are provided with smooth, rounded chamfers.

[0021] One of the connecting flanges 4 corresponding to the through hole 15 has a limiting hole on its inner side, and a limiting pin is provided in the limiting hole. The inner end of the limiting pin has a disc-shaped limiting cap 2, and the outer end of the limiting pin extends into the through hole 15. When the locking nut on the connecting stud 3 is tightened, the limiting pin can be inserted into the limiting hole, and then the rear part of the limiting pin is inserted into the through hole 15, with the head not protruding.

[0022] The limiting pin and the through hole 15 are interference fit, and the outer end of the limiting pin is inside the through hole 15.

[0023] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0024] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., 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 and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A modular quick-installation ventilation duct, comprising flexible ducts (6) connected to both ends of an axial flow fan (1), with square-to-round connecting pipes (8) connected to both ends of the flexible ducts (6), and multiple ventilation square pipes (9) connected to the outer ends of the square-to-round connecting pipes (8), with connecting flanges (4) fixed at both ends of the flexible ducts (6), connecting flanges (5) provided at both ends of the axial flow fan (1), and connecting flanges (14) provided at both ends of the square-to-round connecting pipes (8) and the ventilation square pipes (9), characterized in that: Multiple connecting studs (3) are evenly fixed on the outer wall of connecting flange one (4). Locking nuts are provided on the connecting studs (3). Connecting flange two (5) and connecting flange three (14) near the axial flow fan (1) are provided with through holes (15) for the locking nuts to pass through. Through holes (15) are connected with arc-shaped strip holes (16) that match the connecting studs (3). Connecting inserts (12) are provided between adjacent ventilation square pipes (9) and between ventilation square pipes (9) and square-to-round connecting pipes (8) and extend into their inner holes. A fixing flange (13) is fixed on the middle outer side of the connecting insert (12). Quick-install fixing clamps are provided on the outer side of connecting flange three (14) and fixing flange (13).

2. The modular quick-installation ventilation duct according to claim 1, characterized in that: The quick-installation fixing clamp includes two U-shaped frame pieces (11). The inner wall of the frame piece (11) is provided with a clamping groove (17) to accommodate the clamping connection flange (14) and the fixing flange (13). The connecting end of the two frame pieces (11) is provided with a connecting flange (10), and the connecting flange (10) is provided with a locking bolt.

3. The modular quick-installation ventilation duct according to claim 2, characterized in that: Square elastic sealing gaskets (7) are provided on both sides of the fixed flange (13). Sealing gaskets are provided between connecting flange one (4) and connecting flange two (5), and between connecting flange two (5) and circular connecting flange three (14). The sealing gaskets are located inside the strip hole (16).

4. The modular quick-installation ventilation duct according to claim 1, characterized in that: The inner holes at both ends of the connecting tube (12) are provided with tapered guide cone surfaces.

5. The modular quick-installation ventilation duct according to claim 4, characterized in that: The outer sides of both ends of the connecting cannula (12) are provided with smooth transition chamfers in the shape of arcs.

6. The modular quick-installation ventilation duct according to claim 1, characterized in that: One of the perforations (15) has a limiting hole on the inner side of the connecting flange (4), a limiting pin is provided in the limiting hole, a disc-shaped limiting cap (2) is provided at the inner end of the limiting pin, and the outer end of the limiting pin extends into the perforation (15).

7. The modular quick-installation ventilation duct according to claim 6, characterized in that: The limiting pin and the through hole (15) are interference fit, and the outer end of the limiting pin is inside the through hole (15).

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