An internal cleaning device for a ventilation duct

Abstract

This utility model relates to a ventilation duct internal cleaning device, characterized by comprising an adjusting rod and a connecting rod. The connecting rod is fitted around the outer periphery of the adjusting rod, and the adjusting rod can rotate with the axis of the connecting rod as its rotation center. Both ends of the adjusting rod extend outwards from the connecting rod as a driving end and a connecting end, respectively. An adjusting disc is fixed to the connecting end. The connecting disc is fixed to the side of the connecting rod near the connecting end. The connecting disc has multiple circumferentially evenly distributed connecting grooves extending radially. An installation rod that can slide along the extension direction of the connecting groove is provided within each connecting groove. Brush bristles are provided on the side of the installation rod away from the connecting groove. The brush bristles move radially by rotating the adjusting rod to adapt to ventilation ducts of different inner diameters. This utility model has the following advantages and effects: it can thoroughly clean the inner wall of the ventilation duct.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, and specifically to a ventilation duct internal cleaning device. Background Technology

[0002] Ventilation ducts are pipes used for air circulation, primarily in industrial and civil buildings for ventilation, or in air conditioning systems for transporting air. During use, crystals, dirt, or residues can accumulate on the inner walls of ventilation ducts. This deposition and adhesion of these crystals, dirt, or residues gradually reduces the duct's diameter, necessitating regular cleaning of the ventilation ducts.

[0003] Currently, the main method used in the market is to flush away dirt from the inner walls of ventilation ducts using high-pressure water jets. For example, Chinese patent document CN222587550U discloses a duct cleaning device, including a flushing pipe assembly. The flushing pipe assembly includes a flexible hose, a connecting coil connected to the left side of the flexible hose, and a water outlet pipe connected to the side of the connecting coil. A connecting pipe is threaded onto the outside of the water outlet pipe. A cleaning component is installed on the outside of the flexible hose. The cleaning component includes a snap-fit ​​ring fastened to the outside of the flexible hose, a fastening component connected to the outside of the snap-fit ​​ring, and a steel wire rope inserted inside the fastening component. A cleaning component is located on the left side of the connecting coil.

[0004] In the above technical solution, by attaching a snap ring to the outside of the hose, the steel wire rope passes through the inside of the ring tube, which makes the hose flexible and allows it to move inside the curved pipe. During the movement of the hose, the fan-shaped water flow sprayed from the nozzle can flush the inner wall of the hose, ensuring the cleanliness of the inside of the pipe and improving the convenience of cleaning.

[0005] However, in actual use, it was found that simply rinsing the inner wall of the ventilation duct was not enough to remove all the dirt that would remain, resulting in insufficient cleaning of the duct's inner wall. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a ventilation duct internal cleaning device that can thoroughly clean the inner wall of the ventilation duct.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an internal cleaning device for ventilation ducts, comprising an adjusting rod and a connecting rod. The connecting rod is fitted around the outer periphery of the adjusting rod. The adjusting rod can rotate with the axis of the connecting rod as its rotation center. Both ends of the adjusting rod extend outward from the connecting rod as a driving end and a connecting end, respectively. An adjusting disc is fixed to the connecting end. The connecting rod is fixed with the connecting disc on the side near the connecting end. The connecting disc has multiple connecting grooves evenly distributed circumferentially. The connecting grooves extend radially. An installation rod that can slide along the extension direction of the connecting groove is provided in the connecting groove. The installation rod has bristles on the side away from the connecting groove. The bristles move radially by rotating the adjusting rod to adapt to ventilation ducts with different inner diameters.

[0008] The present invention is further configured such that: the adjusting plate is provided with a through adjusting arc, there are multiple adjusting arcs and they are evenly distributed around the circumference; the connecting plate is provided with a guide port on the side surface facing the adjusting plate that communicates with the connecting groove; the surface of the mounting rod is connected to a transmission rod, the transmission rod extends toward the adjusting arc through the guide port and is coupled with the adjusting arc.

[0009] The present invention is further configured such that: the mounting rod is provided with a threaded groove, and the transmission rod is provided with an external thread at the end away from the adjustment arc, which forms a threaded engagement with the threaded groove.

[0010] The present invention is further configured such that: a locking mechanism is provided on the side of the connecting rod near the driving end, the locking mechanism is used to lock the adjusting rod, and a handle is fixed to the end of the driving end.

[0011] The present invention is further configured such that: the locking mechanism includes a base sleeve and a locking sleeve; the base sleeve is fitted and fixed to the outer periphery of the connecting rod; the end of the base sleeve is provided with teeth, which are multiple and evenly distributed circumferentially; the surface of the teeth is provided with guide sidewalls; the locking sleeve is fitted to the outer periphery of the base sleeve and can form a threaded engagement with the base sleeve; one inner wall of the locking sleeve is provided with a compression sidewall; the compression sidewall is gradually contacted by the rotation of the locking sleeve, pushing the teeth to retract inward.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] By setting up multiple mounting rods arranged in a circular pattern, with brush bristles connected to one end of each rod, after the inner wall of the ventilation duct is rinsed by a high-pressure water jet, the brush bristles abut against the inner wall of the ventilation duct, and the adjusting rod is pulled back and forth axially to scrub the inner wall of the ventilation duct. This ensures that the inner wall of the ventilation duct is thoroughly cleaned, preventing dirt residue. Therefore, it effectively solves the technical problem of insufficient cleaning of the inside of ventilation ducts in existing technologies. Furthermore, the brush bristles can move radially by rotating the adjusting rod to adapt to ventilation ducts with different inner diameters, thereby expanding the scope of application. 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 schematic diagram of the exploded structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the locking mechanism in this utility model;

[0017] Figure 4 This is a schematic diagram of the specific structure of the connecting disc in this utility model. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] like Figures 1 to 4As shown, this utility model discloses an internal cleaning device for ventilation ducts, including an adjusting rod 1 and a connecting rod 2. The connecting rod 2 is fitted around the outer periphery of the adjusting rod 1, and the two are coaxially arranged. The adjusting rod 1 can rotate with the axis of the connecting rod 2 as the rotation center. Both ends of the adjusting rod 1 extend to the outside of the connecting rod 2, one end being a driving end 101 and the other end being a connecting end 102. A handle 7 is fixed to the end of the driving end 101 for easy manual rotation of the adjusting rod 1. An adjusting plate 3 is fixed to the connecting end 102. A connecting plate 4 is fixed to the side of the connecting rod 2 near the connecting end 102. The connecting plate 4 has multiple connecting grooves 41 evenly distributed circumferentially. The connecting grooves 41 extend radially, and an installation rod 5 that can slide along the extension direction of the connecting groove 41 is provided in the connecting groove 41. The installation rod 5 has bristles 6 on the side away from the connecting groove 41. The bristles 6 move radially by rotating the adjusting rod 1 to adapt to ventilation ducts with different inner diameters. During cleaning, by pressing the brush bristles 6 against the inner wall of the ventilation duct, the adjusting rod 1 can be pulled back and forth along the axis to scrub the inner wall of the ventilation duct. This ensures that the inner wall of the ventilation duct is thoroughly cleaned and prevents dirt residue.

[0021] In this embodiment, the structure allowing the brush bristles 6 to move radially is as follows: The adjusting disc 3 has multiple evenly distributed circumferential adjusting arcs 31, each arc-shaped through groove whose curvature matches the rotation stroke of the adjusting rod 1. The connecting disc 4 has a guide opening 42 on its surface facing the adjusting disc 3, communicating with the connecting groove 41. A transmission rod 9 is connected to the surface of the mounting rod 5, extending through the guide opening 42 towards the adjusting arcs 31 and coupling with them. When the adjusting rod 1 is rotated, the adjusting disc 3 rotates accordingly, causing the transmission rod 9 to slide along the arc-shaped path of the adjusting arc 31, pushing the mounting rod 5 radially within the connecting groove 41, thereby adjusting the extension length of the brush bristles 6 to adapt to ventilation ducts of different inner diameters.

[0022] In addition, the mounting rod 5 is provided with a threaded groove, and the transmission rod 9 is provided with an external thread that forms a threaded engagement with the threaded groove at the end away from the adjustment arc 31. In this way, by screwing the transmission rod 9 in or out, a detachable connection between the transmission rod 9 and the mounting rod 5 can be achieved, which facilitates the overall assembly.

[0023] In this embodiment, a locking mechanism is further provided on the side of the connecting rod 2 near the drive end 101. The locking mechanism includes a base sleeve 81 and a locking sleeve 82. The base sleeve 81 is fixed to the outer periphery of the connecting rod 2, and its end is provided with a plurality of teeth 811 with guide sidewalls 811-1, each tooth 811 being evenly distributed along the circumference. The locking sleeve 82 is connected to the base sleeve 81 by threads, and its inner wall is provided with a pressing sidewall 821. When the locking sleeve 82 is tightened, the pressing sidewall 821 presses against the guide sidewalls 811-1 of the teeth 811, causing the teeth 811 to retract inward and clamp the adjusting rod 1, thereby fixing the position of the adjusting rod 1 and preventing it from loosening during cleaning. During operation, the adjusting rod 1 is rotated by the handle 7, and the transmission rod 9 drives the mounting rod 5 to move until the brush bristles 6 contact the inner wall of the pipe. After that, the locking sleeve 82 is tightened to lock the position. Then, the adjusting rod 1 is manually pulled back and forth along the axial direction to clean the inner wall of the ventilation duct.

[0024] 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 ventilation duct internal cleaning device, characterized in that, The device includes an adjusting rod and a connecting rod. The connecting rod is fitted around the outer periphery of the adjusting rod and can rotate around the axis of the connecting rod. Both ends of the adjusting rod extend outward from the connecting rod as a driving end and a connecting end, respectively. An adjusting disc is fixed to the connecting end. The connecting disc is fixed to the side of the connecting rod near the connecting end. The connecting disc has multiple connecting grooves evenly distributed around its circumference and extends radially. An installation rod that can slide along the extension direction of the connecting groove is provided in the connecting groove. The installation rod has bristles on the side away from the connecting groove. The bristles move radially by rotating the adjusting rod to adapt to ventilation ducts with different inner diameters.

2. The ventilation duct internal cleaning device according to claim 1, characterized in that, The adjusting plate has a through adjusting arc, and there are multiple adjusting arcs evenly distributed around the circumference. The connecting plate has a guide port on the side facing the adjusting plate that communicates with the connecting groove. The mounting rod is connected to a transmission rod, which extends toward the adjusting arc through the guide port and couples with the adjusting arc.

3. The ventilation duct internal cleaning device according to claim 2, characterized in that, The mounting rod is provided with a threaded groove, and the transmission rod at the end away from the adjustment arc is provided with an external thread that forms a threaded fit with the threaded groove.

4. The ventilation duct internal cleaning device according to claim 1, characterized in that, The connecting rod is provided with a locking mechanism on the side near the drive end, which is used to lock the adjusting rod. A handle is fixed to the end of the drive end.

5. The ventilation duct internal cleaning device according to claim 4, characterized in that, The locking mechanism includes a base sleeve and a locking sleeve. The base sleeve is fitted and fixed to the outer periphery of the connecting rod. The end of the base sleeve is provided with teeth, which are multiple and evenly distributed around the circumference. The surface of the teeth is provided with guide sidewalls. The locking sleeve is fitted to the outer periphery of the base sleeve and can form a threaded engagement with the base sleeve. One inner wall of the locking sleeve is provided with a compression sidewall. The compression sidewall is gradually contacted by the rotation of the locking sleeve, pushing the teeth to retract inward.

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