PP air pipe expansion joint

Abstract

The utility model relates to the technical field of air pipe equipment, and discloses a PP air pipe expansion joint which comprises an air pipe body, a crank is arranged at the front end of the air pipe body, a rotating shaft is fixedly connected to the rear end of the crank, the outer wall of the rotating shaft is rotationally connected to the inner wall of the air pipe body, and the rotating shaft is connected with an expansion pipe through an expansion assembly. The inner wall of the telescopic pipe is fixedly connected with a filter screen, the top end of the telescopic pipe is fixedly connected with a side box, the inner wall of the side box is rotatably connected with a rotating disc, the front end of the rotating disc is fixedly connected with a control column, the control column is connected with cleaning brushes on the front side and the rear side through a cleaning assembly, and a collecting box is installed at the bottom end of the telescopic pipe. According to the air pipe, the motor drives the rotating disc to rotate, the cleaning brush cleans the filter screen, the filter screen is prevented from being blocked due to excessive dust, the overall length of the air pipe can be adjusted, the length of the telescopic joint is allowed to be adjusted during installation, and the requirement for the intervals of different pipe sections is met.

Description

Technical Field

[0001] This utility model relates to the field of duct equipment technology, and in particular to a PP duct expansion joint. Background Technology

[0002] PP pipes are non-toxic, hygienic, heat-resistant, and recyclable, making them widely used in waste gas treatment systems and ventilation systems. For example, PP ducts are commonly used in chemical plants, electronics factories, and paint spraying plants to transport and purify industrial waste gases. They are also used for ventilation in enclosed spaces such as shopping malls, office buildings, and hotels.

[0003] A search revealed CN220727396U, a type of anti-clogging PP duct with a telescopic adjustment mechanism, relating to the field of anti-clogging PP duct technology. It includes a fixing component, a filter component, and a support clamping component. The fixing component includes a telescopic tube with a mounting base on one side. A pad is mounted on the outer wall of the mounting base, and an air pump is placed on the upper surface of the pad. A bend is provided inside the telescopic duct. The support component includes multiple support frames, one side of which is covered with a waterproof soft cloth and an air pump. A connecting pipe is installed on one side of the air pump, with one end connected to the bend. A nozzle is located on one side of the bend. The air pump pushes the air inside the telescopic duct, preventing impurities and dust from causing blockages.

[0004] Based on the aforementioned patent, the dust on the internal filter screen of the air duct and flue, which is mentioned in the background technology, becomes difficult to clean after long-term use, leading to blockage of the air duct. In response to this technical problem, this application proposes a PP air duct expansion joint. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of large amounts of dust adhering to the filter screen, which is difficult to clean and leads to duct blockage. The invention proposes a PP duct expansion joint, which uses a motor to drive a turntable to rotate, allowing a cleaning brush to clean the filter screen, preventing excessive dust from clogging it. It also allows for adjustment of the overall length of the duct, enabling the expansion joint to be adjusted during installation to meet different duct spacing requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PP duct expansion joint, comprising a duct body, a crank handle at the front end of the duct body, a rotating shaft fixedly connected to the rear end of the crank handle, the outer wall of the rotating shaft rotatably connected to the inner wall of the duct body, the rotating shaft being connected to an expansion tube via an expansion assembly, a filter screen fixedly connected to the inner wall of the expansion tube, a side box fixedly connected to the top end of the expansion tube, a turntable rotatably connected to the inner wall of the side box, a control column fixedly connected to the front end of the turntable, the control column being connected to front and rear cleaning brushes via a cleaning assembly, and a collection box installed at the bottom end of the expansion tube.

[0007] Furthermore, the telescopic assembly includes a first gear fixedly connected to the rear end of the rotating shaft, a first toothed plate meshing with the outer wall of the first gear, the outer wall of the first toothed plate slidably connected to the inner wall of the air duct body, and the top end of the first toothed plate fixedly connected to the bottom end of the telescopic tube.

[0008] Furthermore, a screw is threadedly connected to the inner wall of the bottom end of the duct body, and a second toothed plate is rotatably connected to the top end of the screw. The outer wall of the second toothed plate is slidably connected to the inner wall of the duct body, and the second toothed plate meshes with the first gear.

[0009] Furthermore, the cleaning assembly includes a movable plate sleeved on the outer wall of the control column, a movable rod fixedly connected to the bottom end of the movable plate, and the outer wall of the movable rod slidably connected to the inner wall of the telescopic tube.

[0010] Furthermore, the inner wall of the movable rod is rotatably connected to a connecting shaft, and the inner walls of the cleaning brushes on both the front and rear sides are fixedly connected to the outer wall of the connecting shaft.

[0011] Furthermore, a second gear is fixedly connected to both the front and rear sides of the connecting shaft, and a third toothed plate is meshed with the outer wall of each of the second gears. The outer wall of the third toothed plate is fixedly connected to the inner wall of the telescopic tube.

[0012] Furthermore, a motor is fixedly connected to the left end of the side box, and the left end of the turntable is fixedly connected to the motor drive end.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, a filter screen is installed on the inner wall of the telescopic tube to filter dust. The motor drives the turntable to rotate, which in turn drives the connecting shaft to move up and down. During the movement of the connecting shaft, the second gear rotates on the third tooth plate, thereby cleaning the filter screen with a cleaning brush and preventing excessive dust from clogging the filter screen.

[0015] 2. In this utility model, the crank handle drives the rotating shaft to rotate, thereby causing the first gear to drive the first toothed plate to move outward, and the first toothed plate to drive the telescopic pipe to move outward, thereby adjusting the overall length of the duct. This allows the telescopic joint to be adjusted in length during installation to adapt to different pipe section spacing requirements. Attached Figure Description

[0016] Figure 1 This is a perspective view of a PP duct expansion joint proposed in this utility model;

[0017] Figure 2 This utility model provides a cross-sectional view of the main body of a PP duct expansion joint.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a side box sectional view of a PP duct expansion joint proposed in this utility model;

[0020] Figure 5 This is a cross-sectional view of the expansion joint of a PP duct according to the present invention.

[0021] Figure 6 for Figure 5 Enlarged diagram of point B in the middle.

[0022] Legend:

[0023] 1. Main body of the duct; 2. Telescopic tube; 3. Handle; 4. Rotating shaft; 5. First gear; 6. First toothed plate; 7. Screw; 8. Second toothed plate; 9. Side box; 10. Motor; 11. Turntable; 12. Control column; 13. Moving plate; 14. Moving rod; 15. Connecting shaft; 16. Cleaning brush; 17. Second gear; 18. Third toothed plate; 19. Filter screen; 20. Collection box. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1-3This utility model provides an embodiment of a PP duct expansion joint, comprising a duct body 1, a crank handle 3 at the front end of the duct body 1, a rotating shaft 4 fixedly connected to the rear end of the crank handle 3, the outer wall of the rotating shaft 4 being rotatably connected to the inner wall of the duct body 1, a first gear 5 fixedly connected to the rear end of the rotating shaft 4, a first toothed plate 6 meshing with the outer wall of the first gear 5, the outer wall of the first toothed plate 6 being slidably connected to the inner wall of the duct body 1, the top end of the first toothed plate 6 being fixedly connected to the bottom end of the expansion tube 2, a screw 7 threadedly connected to the inner wall of the bottom end of the duct body 1, a second toothed plate 8 rotatably connected to the top end of the screw 7, and a knob fixed to the bottom end of the screw 7 for easy rotation of the screw 7. The screw 7 drives the second toothed plate 8 to move upward, so that the second toothed plate 8 meshes with the first gear 5, thereby fixing the first gear 5 and preventing it from rotating, thus fixing the expansion tube 2. The outer wall of the second toothed plate 8 is slidably connected to the inner wall of the duct body 1, and the second toothed plate 8 meshes with the first gear 5.

[0026] Reference Figures 4-6 A filter screen 19 is fixedly connected to the inner wall of the telescopic tube 2. A side box 9 is fixedly connected to the top of the telescopic tube 2. A turntable 11 is rotatably connected to the inner wall of the side box 9. A control column 12 is fixedly connected to the front end of the turntable 11. A movable plate 13 is sleeved on the outer wall of the control column 12. A movable groove is opened on the inner wall of the movable plate 13. When the control column 12 rotates with the turntable 11, it will slide and rotate in the movable groove, causing the movable plate 13 to move up and down. A movable rod 14 is fixedly connected to the bottom end of the movable plate 13. The outer wall of the movable rod 14 is slidably connected to the inner wall of the telescopic tube 2. A connecting shaft 15 is rotatably connected to the inner wall of the movable rod 14. The inner wall of the side cleaning brush 16 is fixedly connected to the outer wall of the connecting shaft 15. The front and rear sides of the connecting shaft 15 are fixedly connected to the second gear 17. The outer wall of the second gear 17 is meshed with the third tooth plate 18. The outer wall of the third tooth plate 18 is fixedly connected to the inner wall of the telescopic tube 2. The bottom end of the telescopic tube 2 is equipped with a collection box 20. The inner wall of the bottom end of the telescopic tube 2 is provided with a slot. Dust falls into the collection box 20 at the bottom end through the slot. The dust can be cleaned by pulling out the box inside the collection box 20. The left end of the side box 9 is fixedly connected to the motor 10. The left end of the turntable 11 is fixedly connected to the drive end of the motor 10.

[0027] Working principle: When adjusting the length of the duct body 1, turn the crank handle 3. The crank handle 3 drives the rotating shaft 4 to rotate, which in turn drives the first gear 5 to rotate, thereby driving the first toothed plate 6 to rotate. The first toothed plate 6 then drives the telescopic tube 2 to move outward, thus changing the length of the duct body 1. When the telescopic tube 2 is used for long-term air intake, the internal filter screen 19 may accumulate a lot of dust, causing the filter screen 19 to become clogged. At this time, the motor 10 can be started. The motor 10 drives the turntable 11 to rotate, which in turn drives the control column 12 to rotate with the turntable 11, thereby driving the moving plate 13 to move up and down. The moving plate 13 drives the moving rod 14 to move up and down, which in turn drives the connecting shaft 15 to move up and down, causing the cleaning brush 16 to move on the surface of the filter screen 19. While the connecting shaft 15 is moving, it will cause the second gear 17 to move on the third toothed plate 18, causing the second gear 17 to rotate. The second gear 17 drives the connecting shaft 15 to rotate, causing the cleaning brush 16 to move and rotate at the same time. The dust that is cleaned will fall into the collection box 20 below.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PP duct expansion joint, characterized in that, The system includes a duct body (1), a crank handle (3) at the front end of the duct body (1), a rotating shaft (4) fixedly connected to the rear end of the crank handle (3), the outer wall of the rotating shaft (4) being rotatably connected to the inner wall of the duct body (1), the rotating shaft (4) being connected to the telescopic pipe (2) through a telescopic assembly, a filter screen (19) being fixedly connected to the inner wall of the telescopic pipe (2), a side box (9) being fixedly connected to the top end of the telescopic pipe (2), a turntable (11) being rotatably connected to the inner wall of the side box (9), a control column (12) being fixedly connected to the front end of the turntable (11), the control column (12) being connected to the front and rear cleaning brushes (16) through a cleaning assembly, and a collection box (20) being installed at the bottom end of the telescopic pipe (2).

2. The PP duct expansion joint according to claim 1, characterized in that: The telescopic assembly includes a first gear (5) fixedly connected to the rear end of the rotating shaft (4), a first toothed plate (6) meshing with the outer wall of the first gear (5), the outer wall of the first toothed plate (6) slidingly connected to the inner wall of the air duct body (1), and the top end of the first toothed plate (6) fixedly connected to the bottom end of the telescopic pipe (2).

3. A PP duct expansion joint according to claim 2, characterized in that: The bottom inner wall of the duct body (1) is threaded with a screw (7), and the top of the screw (7) is rotatably connected with a second toothed plate (8). The outer wall of the second toothed plate (8) is slidably connected to the inner wall of the duct body (1), and the second toothed plate (8) meshes with the first gear (5).

4. The PP duct expansion joint according to claim 1, characterized in that: The cleaning assembly includes a movable plate (13) sleeved on the outer wall of the control column (12), and a movable rod (14) is fixedly connected to the bottom end of the movable plate (13). The outer wall of the movable rod (14) is slidably connected to the inner wall of the telescopic tube (2).

5. A PP duct expansion joint according to claim 4, characterized in that: The inner wall of the movable rod (14) is rotatably connected to the connecting shaft (15), and the inner walls of the cleaning brushes (16) on both the front and rear sides are fixedly connected to the outer wall of the connecting shaft (15).

6. A PP duct expansion joint according to claim 5, characterized in that: The connecting shaft (15) is fixedly connected to the front and rear sides with a second gear (17), and the outer wall of the second gear (17) is meshed with a third tooth plate (18), and the outer wall of the third tooth plate (18) is fixedly connected to the inner wall of the telescopic tube (2).

7. A PP duct expansion joint according to claim 1, characterized in that: The left end of the side box (9) is fixedly connected to a motor (10), and the left end of the turntable (11) is fixedly connected to the drive end of the motor (10).

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