Folding type portable ventilation pipeline

Abstract

The utility model discloses a folding type portable ventilating duct which is applied to the field of ventilating ducts and comprises a telescopic air pipe, one end of the telescopic air pipe is communicated with a pipe head, the inner wall of the pipe head is in bolted connection with a supporting frame, the inner wall of the pipe head is rotationally sleeved with a screw rod, and a telescopic rod is arranged on the inner wall of the screw rod in a penetrating mode. When air exhaust is stopped, air pressure in the telescopic air pipe disappears, the blocking plate and the supporting frame are pressed tightly under the action of the first spring, and the telescopic pipe is blocked, the purpose of a backflow prevention function can be achieved, external air and dust are prevented from flowing back into a room, and practicability is improved. The transmission block moves to enable the clamping block to be separated from the clamping groove under the action of the third spring, the telescopic air pipe is separated from the output end of the exhaust fan, the purpose of being convenient to assemble and disassemble with the exhaust fan can be achieved, the workload is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation ducts, and in particular to a foldable portable ventilation duct. Background Technology

[0002] A search of Chinese patents revealed publication number CN221034498U, which discloses an adjustable-length ventilation duct, belonging to the field of ventilation duct technology. The duct includes a main body, a first adjusting pipe on one side, and a second adjusting pipe on the other side. Flanges are located on the sides of both the first and second adjusting pipes away from the main body. A drive box is housed inside the main body, and locking blocks are fixedly connected to both ends of the main body. This invention solves the problem of limited use due to the simple structure and inconvenient length adjustment of existing ventilation ducts. By incorporating movable first and second adjusting pipes, the length of both ends of the ventilation duct can be adjusted to the desired length, making it flexible and convenient to use, compared to existing single, fixed ventilation ducts.

[0003] Existing ventilation ducts lack backflow prevention. Generally, ventilation ducts direct the air exhausted by the fan to the desired location. However, when not in use, if the outside wind is strong, air can flow back into the duct, and dust and debris from the outside can easily enter the room through the duct, affecting the performance. They are also inconvenient to install and remove from the exhaust fan. Generally, ducts and exhaust fans are connected and installed using flanges or other structures. During installation, tools are needed to remove and install bolts, which is cumbersome, increases workload, improves work efficiency, and is inconvenient to use. To solve the above problems, we propose a foldable portable ventilation duct. Utility Model Content

[0004] The purpose of this invention is to provide a foldable portable ventilation duct, which has the advantages of anti-backflow function and easy installation and disassembly with exhaust fans.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a foldable portable ventilation duct, including a telescopic duct, one end of which is connected to a pipe head, a support frame is bolted to the inner wall of the pipe head, a screw is rotatably sleeved on the inner wall of the pipe head, a telescopic rod is provided through the inner wall of the screw, a blocking plate is bolted to the bottom of the telescopic rod, an adjusting plate is threadedly connected to the surface of the screw, a first spring is provided between the adjusting plate and the blocking plate, and the first spring is sleeved on the surface of the screw and the telescopic rod.

[0006] By adopting the above technical solution, when the exhaust stops, the air pressure in the telescopic duct disappears, and the blocking plate is pressed against the support frame under the action of the first spring, thus blocking the telescopic duct. This achieves the purpose of preventing backflow, avoiding the return of external wind and dust to the room, and improving practicality.

[0007] The present invention is further configured such that: the other end of the telescopic duct is connected to a connector, the inner wall of the connector is slidably sleeved with an exhaust fan output end, a limit ring is fixedly sleeved on the surface of the connector, a slide cylinder is slidably sleeved on the surface of the connector, a second spring is provided between the slide cylinder and the limit ring, a transmission block is bolted to the inner wall of the slide cylinder, a snap-fit ​​block is slidably connected to the surface of the transmission block, a third spring is provided between the surface of the snap-fit ​​block and the connector, and a snap-fit ​​groove is opened on the surface of the exhaust fan output end, and the snap-fit ​​groove snaps with the snap-fit ​​connector.

[0008] By adopting the above technical solution, the transmission block is moved by moving the sliding cylinder. The movement of the transmission block causes the locking block to disengage from the locking groove under the action of the third spring, thus separating the telescopic air duct from the exhaust fan output end. This method can facilitate the installation and disassembly of the exhaust fan, reduce workload, and improve work efficiency.

[0009] The present invention is further configured such that a rotating head is bolted to the top of the screw.

[0010] By adopting the above technical solution, a rotating head is provided to facilitate the rotation of the screw and make adjustment convenient.

[0011] The present invention is further configured such that: a slider is bolted to the surface of the adjusting plate, and a groove is slidably connected to the surface of the slider, the groove being formed on the inner wall of the tube head.

[0012] By adopting the above technical solution, the adjustment plate is prevented from shifting and stability is improved by setting sliders and grooves.

[0013] The present invention is further configured such that a first sealing gasket is provided between the blocking plate and the support frame.

[0014] By adopting the above technical solution, a first sealing gasket is set to prevent air leakage.

[0015] The present invention is further configured such that: the bottom of the tube head is bolted with a mounting foot.

[0016] By adopting the above technical solution, the installation feet facilitate the fixing of the pipe head.

[0017] The present invention is further provided that the surface of the slide tube is provided with anti-slip texture.

[0018] By adopting the above technical solution, anti-slip texture is set to prevent hand slippage and facilitate operation.

[0019] The present invention is further provided with a second sealing gasket between the exhaust fan output end and the connector.

[0020] By adopting the above technical solution, a second sealing gasket is set to prevent air leakage and ensure sealing performance.

[0021] In summary, this utility model has the following beneficial effects:

[0022] 1. This utility model achieves the purpose of preventing backflow by blocking the telescopic duct when the air pressure in the duct disappears when the exhaust stops, and the blocking plate is pressed against the support frame under the action of the first spring. This prevents external wind and dust from flowing back into the room and improves practicality.

[0023] 2. This utility model uses a movable slide cylinder to move the transmission block. The movement of the transmission block causes the locking block to disengage from the locking groove under the action of the third spring, thus separating the telescopic air duct from the exhaust fan output end. This method facilitates the installation and disassembly of the exhaust fan, reduces workload, and improves work efficiency. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0026] Figure 3 This is a utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0027] Figure 4 This is a utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0028] Reference numerals in the attached drawings: 1. Telescopic duct; 2. Duct head; 3. Support frame; 4. Screw; 5. Telescopic rod; 6. Blocking plate; 7. Adjusting plate; 8. First spring; 9. Connector; 10. Exhaust fan output end; 11. Limiting ring; 12. Slide cylinder; 13. Second spring; 14. Transmission block; 15. Snap-fit ​​block; 16. Third spring; 17. Snap-fit ​​groove; 18. Rotating head; 19. Slider; 20. Slide groove; 21. First sealing gasket; 22. Mounting foot; 23. Anti-slip texture; 24. Second sealing gasket. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1:

[0031] refer to Figure 1 , Figure 2 and Figure 3A foldable portable ventilation duct includes a telescopic duct 1, one end of which is connected to a pipe head 2. A support frame 3 is bolted to the inner wall of the pipe head 2. A screw 4 is rotatably sleeved on the inner wall of the pipe head 2. A telescopic rod 5 is passed through the inner wall of the screw 4. A blocking plate 6 is bolted to the bottom of the telescopic rod 5. An adjusting plate 7 is threadedly connected to the surface of the screw 4. A first spring 8 is provided between the adjusting plate 7 and the blocking plate 6, and the first spring 8 is sleeved on the surface of the screw 4 and the telescopic rod 5. When the exhaust stops, the air pressure in the telescopic duct 1 disappears, and the blocking plate 6 is pressed tightly against the support frame 3 under the action of the first spring 8. The way the telescopic duct is blocked can achieve the purpose of preventing backflow, avoiding the return of external wind and dust to the room, and improving practicality.

[0032] refer to Figure 3 A rotating head 18 is bolted to the top of the screw 4. By setting the rotating head 18, the screw 4 can be rotated easily and adjusted conveniently.

[0033] refer to Figure 3 A slider 19 is bolted to the surface of the adjusting plate 7, and a groove 20 is slidably connected to the surface of the slider 19. The groove 20 is opened on the inner wall of the tube head 2. By setting the slider 19 and the groove 20, the adjusting plate 7 is prevented from shifting and the stability is improved.

[0034] refer to Figure 3 A first sealing gasket 21 is provided between the blocking plate 6 and the support frame 3 to prevent air leakage.

[0035] refer to Figure 1 and Figure 2 The bottom of the pipe head 2 is bolted with a mounting foot 22, which facilitates the fixing of the pipe head 2.

[0036] Example 2:

[0037] refer to Figure 1 , Figure 2 and Figure 4 The other end of the telescopic duct 1 is connected to a connector 9. The inner wall of the connector 9 is slidably fitted with an exhaust fan output end 10. A limit ring 11 is fixedly fitted on the surface of the connector 9. A slide cylinder 12 is slidably fitted on the surface of the connector 9. A second spring 13 is provided between the slide cylinder 12 and the limit ring 11. A transmission block 14 is bolted to the inner wall of the slide cylinder 12. A snap-fit ​​block 15 is slidably connected to the surface of the transmission block 14. A third spring 16 is provided between the surface of the snap-fit ​​block 15 and the connector 9. A snap-fit ​​groove 17 is opened on the surface of the exhaust fan output end 10, and the snap-fit ​​groove 17 snaps with the snap-fit ​​connector. By moving the slide cylinder 12, the transmission block 14 is moved. The movement of the transmission block 14 causes the snap-fit ​​block 15 to disengage from the snap-fit ​​groove 17 under the action of the third spring 16. This method of separating the telescopic duct 1 from the exhaust fan output end 10 can facilitate the installation and disassembly of the exhaust fan, reduce workload, and improve work efficiency.

[0038] refer to Figure 4 The surface of the slide cylinder 12 is provided with anti-slip texture 23. By setting the anti-slip texture 23, the hand slips and the operation is facilitated.

[0039] refer to Figure 4 A second sealing gasket 24 is provided between the exhaust fan output end 10 and the connector 9. By providing the second sealing gasket 24, air leakage is prevented and the airtightness is ensured.

[0040] Brief description of usage: When ventilation is stopped, the exhaust fan stops working, causing the air pressure inside the telescopic duct 1 to disappear. With the air pressure gone, the blocking plate 6, under the action of the first spring 8, presses against the support frame 3, sealing the telescopic duct 1. During use, the exhaust fan operates, increasing the air pressure on the inner wall of the telescopic duct 1. This air pressure pushes the blocking plate 6, causing it to detach from the support frame 3, allowing normal ventilation. Rotating the rotating head 18 causes the screw 4 to move the adjusting plate 7. The movement of the adjusting plate 7 changes the elasticity of the first spring 8, allowing adjustment of the exhaust pressure as needed, thus achieving the purpose of preventing backflow. The sliding cylinder 12 moves... The transmission block 14 is moved, and the movement of the transmission block 14 causes the locking block 15 to disengage from the locking groove 17 under the action of the third spring 16, separating the telescopic air duct 1 from the exhaust fan output end 10, thus completing the disassembly. During installation, the connector 9 on the telescopic air duct 1 is connected to the exhaust fan output end 10, and the slide cylinder 12 is released. Under the action of the second spring 13, the slide cylinder 12 drives the transmission block 14 to reset, and the reset of the transmission block 14 causes the locking block 15 to engage with the locking groove 17, fixing it and completing the installation, thereby achieving the purpose of easy disassembly and assembly. The telescopic air duct 1 in this case is an existing air duct. This type of air duct can be folded and can be adjusted in 360 degrees.

[0041] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A foldable portable ventilation duct, comprising a telescopic duct (1), characterized in that, One end of the telescopic duct (1) is connected to a pipe head (2). A support frame (3) is bolted to the inner wall of the pipe head (2). A screw (4) is rotatably sleeved on the inner wall of the pipe head (2). A telescopic rod (5) is provided through the inner wall of the screw (4). A blocking plate (6) is bolted to the bottom of the telescopic rod (5). An adjusting plate (7) is threadedly connected to the surface of the screw (4). A first spring (8) is provided between the adjusting plate (7) and the blocking plate (6), and the first spring (8) is sleeved on the surface of the screw (4) and the telescopic rod (5).

2. The foldable portable ventilation duct according to claim 1, characterized in that, The other end of the telescopic duct (1) is connected to a connector (9). The inner wall of the connector (9) is slidably fitted with an exhaust fan output end (10). A limit ring (11) is fixedly fitted on the surface of the connector (9). A slide cylinder (12) is slidably fitted on the surface of the connector (9). A second spring (13) is provided between the slide cylinder (12) and the limit ring (11). A transmission block (14) is bolted to the inner wall of the slide cylinder (12). A snap-fit ​​block (15) is slidably connected to the surface of the transmission block (14). A third spring (16) is provided between the surface of the snap-fit ​​block (15) and the connector (9). A snap-fit ​​groove (17) is opened on the surface of the exhaust fan output end (10), and the snap-fit ​​groove (17) snaps into the snap-fit ​​connector.

3. A foldable portable ventilation duct according to claim 1, characterized in that, A rotating head (18) is bolted to the top of the screw (4).

4. A foldable portable ventilation duct according to claim 1, characterized in that, The surface of the adjusting plate (7) is bolted with a slider (19), and the surface of the slider (19) is slidably connected with a groove (20), which is opened on the inner wall of the tube head (2).

5. A foldable portable ventilation duct according to claim 1, characterized in that, A first sealing gasket (21) is provided between the blocking plate (6) and the support frame (3).

6. A foldable portable ventilation duct according to claim 1, characterized in that, The bottom of the pipe head (2) is bolted with a mounting foot (22).

7. A foldable portable ventilation duct according to claim 2, characterized in that, The surface of the slide (12) is provided with anti-slip texture (23).

8. A foldable portable ventilation duct according to claim 2, characterized in that, A second sealing gasket (24) is provided between the exhaust fan output end (10) and the connector (9).

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