Spiral duct convenient to disassemble

Abstract

The utility model relates to the technical field of spiral air pipes, in particular to a spiral air pipe convenient to disassemble, which comprises a plurality of spiral air pipe bodies, a connecting pipe is arranged between every two adjacent spiral air pipe bodies, and two symmetrically distributed connecting mechanisms are arranged on the outer wall of each connecting pipe. A filter screen is arranged in the connecting pipe through a clamping mechanism, the connecting mechanism comprises a first limiting ring fixedly connected to the outer wall of the connecting pipe, the outer wall of the first limiting ring is rotationally connected with a rotating ring, and the outer wall of the rotating ring is rotationally connected with a plurality of connecting rods distributed circumferentially; through cooperation of a first limiting ring, a rotating ring, a connecting rod, a sliding block, a first rotating block, a second rotating block and a threaded rod, the multiple sliding blocks can be driven to synchronously slide inwards or outwards, so that a spiral air pipe body abuts against the interior of a connecting pipe, mounting and dismounting are convenient, through cooperation of a rotating shaft, a pull rope, a clamping rod, a spring and a clamping hole, the clamping rod can be clamped into the clamping hole to fix a filter screen, and the practicability is high. The filter screen is convenient to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the field of spiral duct technology, and specifically discloses a spiral duct that is easy to disassemble. Background Technology

[0002] In the HVAC industry, spiral ducts are mainly used to connect two locations, enabling air circulation between them and serving a ventilation function. They are the most widely used HVAC pipes on the market.

[0003] Chinese patent CN210832454U discloses a detachable spiral duct, comprising multiple interconnected spiral duct bodies. A tapered tube is provided between two adjacent spiral duct bodies. The tapered tube and the spiral duct body are detachably connected by a connector. An exhaust port for discharging heated air is provided on each spiral duct body. The connector includes a clamping plate. A first ring block is fixedly attached to the periphery of each opposite end of the spiral duct body and the tapered tube. Two first ring blocks abut against each other, and the clamping plate grips the outer periphery of the two first ring blocks. This invention facilitates the disassembly of the spiral duct body and the tapered tube for cleaning of the inner wall of the spiral duct body.

[0004] The aforementioned document discloses a type of spiral duct that is easy to disassemble. The two spiral ducts and the connector are connected by clamps and bolts, which makes installation and disassembly inconvenient. Furthermore, the second ring block on the outer wall of the filter screen is fixed inside the spiral duct by bolts, which is also inconvenient to disassemble. Therefore, a spiral duct that is easy to disassemble is needed to solve this problem. Utility Model Content

[0005] This utility model proposes a spiral duct that is easy to disassemble. The spiral duct body can be fixed inside the connecting pipe by rotating the threaded rod, making installation and disassembly convenient. In addition, the filter screen is snapped into the connecting pipe through a snap-fit ​​mechanism, which facilitates the installation and disassembly of the filter screen.

[0006] This utility model is implemented as follows: a spiral duct that is easy to disassemble includes multiple spiral duct bodies, and a connecting pipe is provided between two adjacent spiral duct bodies. The outer wall of the connecting pipe is provided with two symmetrically distributed connecting mechanisms, and the inside of the connecting pipe is provided with a filter screen through a snap-fit ​​mechanism.

[0007] The connecting mechanism includes a first limiting ring fixedly connected to the outer wall of the connecting pipe. A rotating ring is rotatably connected to the outer wall of the first limiting ring. A plurality of circumferentially distributed connecting rods are rotatably connected to the outer wall of the rotating ring. The other ends of the plurality of connecting rods are movably connected to sliders through hinge seats. The plurality of sliders are slidably connected to the inner wall of the connecting pipe. Both ends of the outer wall of the spiral duct body are provided with slots.

[0008] As a preferred embodiment of the present invention for easy disassembly of a spiral duct, the connecting mechanism further includes a first rotating block rotatably connected to the outer wall of the first limiting ring via a coupling shaft and a second rotating block rotatably connected to the outer wall of the rotating ring via a coupling shaft. The first rotating block has a threaded rod rotatably connected inside, and the threaded rod is threadedly connected to the second rotating block.

[0009] As a preferred embodiment of the present invention for an easily disassembled spiral duct, the snap-fit ​​mechanism includes a fixed frame, the filter screen is fixedly connected to the outer wall of the fixed frame, two symmetrically distributed sliding grooves are opened inside the fixed frame, a locking rod is slidably connected inside each of the two sliding grooves, a spring is provided inside each of the two sliding grooves, a fixed ring is fixedly connected to the middle of the filter screen, a rotating shaft is rotatably connected through the inside of the fixed ring, two pull ropes are fixedly connected to the outer wall of the rotating shaft, and the other ends of the two pull ropes extend into the inside of the two sliding grooves and are fixedly connected to the locking rods.

[0010] As a preferred embodiment of the present invention for a spiral duct that is easy to disassemble, the snap-fit ​​mechanism further includes a second limiting ring fixedly connected to the inner wall of the connecting pipe, and the outer wall of the second limiting ring has two snap holes corresponding to the snap rod.

[0011] As a preferred embodiment of the present invention for a spiral duct that is easy to disassemble, the end of the slider near the slot is set as an inclined surface, and the longitudinal section of the slot is an inclined surface.

[0012] As a preferred embodiment of this utility model of a spiral duct that is easy to disassemble, a third limiting ring is fixedly connected to the inner wall of the second limiting ring.

[0013] As a preferred embodiment of this utility model of an easily disassembled spiral duct, the pull rope is made of steel wire.

[0014] The beneficial effects of this utility model are:

[0015] 1. Through the cooperation of the first limiting ring, rotating ring, connecting rod, slider, first rotating block, second rotating block and threaded rod, multiple sliders can be driven to slide inward or outward synchronously, thereby pressing the spiral duct body against the inside of the connecting pipe, which is convenient for installation and disassembly;

[0016] 2. The filter screen can be fixed by engaging the rotating shaft, pull rope, clamping rod, spring, and clamping hole, making it easy to install and remove the filter screen. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is an overall structural diagram of a spiral duct that is easy to disassemble according to the present invention;

[0019] Figure 2 This is a front sectional view of a spiral duct that is easy to disassemble according to this utility model;

[0020] Figure 3 This is a structural diagram of the filter screen of this utility model;

[0021] Figure 4 This is a structural diagram of the connecting pipe of this utility model;

[0022] Figure 5 This utility model Figure 2 Enlarged view of point A in the middle.

[0023] The markings in the diagram are: 1. Connecting pipe; 2. Spiral duct body; 3. First limiting ring; 4. Rotating ring; 5. Connecting rod; 6. Sliding block; 7. Slot; 8. First rotating block; 9. Second rotating block; 10. Threaded rod; 11. Second limiting ring; 12. Third limiting ring; 13. Fixing frame; 14. Filter screen; 15. Rotating shaft; 16. Pull rope; 17. Locking rod; 18. Slide groove; 19. Spring; 20. Locking hole. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0025] Please see Figure 1-5 A detachable spiral duct includes multiple spiral duct bodies 2, with a connecting pipe 1 between each two adjacent spiral duct bodies 2. The outer wall of the connecting pipe 1 is provided with two symmetrically distributed connecting mechanisms, and the inside of the connecting pipe 1 is provided with a filter screen 14 through a snap-fit ​​mechanism.

[0026] The connecting mechanism includes a first limiting ring 3 fixedly connected to the outer wall of the connecting pipe 1. A rotating ring 4 is rotatably connected to the outer wall of the first limiting ring 3. A plurality of circumferentially distributed connecting rods 5 are rotatably connected to the outer wall of the rotating ring 4. The other end of each of the plurality of connecting rods 5 is movably connected to a slider 6 through a hinge seat. The plurality of sliders 6 are slidably connected to the inner wall of the connecting pipe 1. A slot 7 is provided at both ends of the outer wall of the spiral duct body 2.

[0027] In this embodiment: During installation, the connecting pipe 1 is fitted over the outside of the spiral duct body 2, and the spiral duct body 2 is pressed against the outer wall of the second limiting ring 11. The rotating ring 4 is rotated, and the rotating ring 4 drives multiple sliders 6 to slide inward synchronously through the connecting rod 5, thereby pressing the sliders 6 against the outer wall of the slot 7. Since both the sliders 6 and the slot 7 are set as inclined surfaces, the spiral duct body 2 moves towards the connecting pipe 1 under the pressure of the multiple sliders 6, thereby pressing the spiral duct body 2 against the outer wall of the second limiting ring 11, thus completing the fixation of the spiral duct body 2. During disassembly, the rotating ring 4 is rotated in the opposite direction, and the rotating ring 4 drives multiple sliders 6 to slide outward synchronously through the connecting rod 5, disengaging from the slot 7, so that the spiral duct body 2 can be removed. Installation and disassembly are convenient.

[0028] As a technical optimization of this utility model, the connecting mechanism further includes a first rotating block 8 rotatably connected to the outer wall of the first limiting ring 3 via a coupling shaft and a second rotating block 9 rotatably connected to the outer wall of the rotating ring 4 via a coupling shaft. The first rotating block 8 is rotatably connected to a threaded rod 10, and the threaded rod 10 is threadedly connected to the second rotating block 9.

[0029] In this embodiment: rotating the threaded rod 10 causes the second rotating block 9 to move along the threaded rod 10. The second rotating block 9 further causes the rotating ring 4 to rotate, thereby causing the slider 6 to move inward or outward, which facilitates the disassembly or installation of the spiral duct body 2.

[0030] As a technical optimization of this utility model, the locking mechanism includes a fixed frame 13, the filter screen 14 is fixedly connected to the outer wall of the fixed frame 13, the fixed frame 13 has two symmetrically distributed sliding grooves 18 inside, the two sliding grooves 18 are slidably connected to the inside of each sliding groove 18, the two sliding grooves 18 are each provided with a spring 19, the middle of the filter screen 14 is fixedly connected to a fixed ring, the inside of the fixed ring is rotatably connected to a rotating shaft 15, the outer wall of the rotating shaft 15 is fixedly connected to two pull ropes 16, the other ends of the two pull ropes 16 extend into the inside of the two sliding grooves 18 respectively and are fixedly connected to the pull rods 17.

[0031] In this embodiment: Rotating the shaft 15, the pull rope 16 is wound around the shaft 15, which in turn drives the locking rod 17 to slide inward along the slide groove 18 and compresses the spring 19, placing the fixing frame 13 into the connecting tube 1 and aligning the locking rod 17 with the locking hole 20. The shaft 15 is then released, and the locking rod 17 slides outward under the elastic force of the spring 19, locking into the locking hole 20, thus fixing the fixing frame 13 and the filter screen 14. This makes installation and disassembly convenient.

[0032] As a technical optimization of this utility model, the locking mechanism further includes a second limiting ring 11 fixedly connected to the inner wall of the connecting pipe 1, and the outer wall of the second limiting ring 11 has two locking holes 20 corresponding to the locking rod 17.

[0033] In this embodiment: the clip 17 is inserted into the clip hole 20 to facilitate fixing the filter screen 14.

[0034] As a technical optimization of this utility model, the end of the slider 6 near the slot 7 is set as an inclined surface, and the longitudinal section of the slot 7 is an inclined surface.

[0035] In this embodiment: by setting the opposite sides of the slider 6 and the slot 7 as inclined surfaces, it is easy for the spiral duct body 2 to abut against the outer wall of the second limiting ring 11.

[0036] As a technical optimization of this utility model, a third limiting ring 12 is fixedly connected to the inner wall of the second limiting ring 11.

[0037] In this embodiment: by setting a third limiting ring 12, it is convenient to limit the position of the fixed frame 13.

[0038] As a technical optimization of this utility model, the pull rope 16 is made of steel wire.

[0039] In this embodiment, by setting the pull rope 16 as a steel wire, the strength and service life of the pull rope 16 can be increased.

[0040] The working principle and usage process of this utility model are as follows: When installing the spiral duct body 2, the connecting pipe 1 is sleeved on the outside of the spiral duct body 2, and the spiral duct body 2 is pressed against the outer wall of the second limiting ring 11. The threaded rod 10 is rotated, which in turn drives the second rotating block 9 to move along the threaded rod 10. The second rotating block 9 further drives the rotating ring 4 to rotate. The rotating ring 4 drives multiple sliders 6 to slide inward synchronously through the connecting rod 5, so that the sliders 6 are pressed against the outer wall of the slot 7. Since both the sliders 6 and the slot 7 are set as inclined surfaces, the spiral duct body 2 moves towards the connecting pipe 1 under the pressure of multiple sliders 6, so that the spiral duct body 2 is pressed against the outer wall of the second limiting ring 11, thus completing the fixation of the spiral duct body 2. When disassembling, the rotating ring 4 is rotated in the opposite direction, so that the rotating ring 4 drives multiple sliders 6 to slide outward synchronously through the connecting rod 5, and disengages from the slot 7, so that the spiral duct body 2 can be removed. The installation and disassembly are convenient.

[0041] When installing the filter screen 14, rotate the shaft 15 to wind the pull rope 16 around the shaft 15, which in turn drives the locking rod 17 to slide inward along the slide groove 18 and compresses the spring 19. Place the fixing frame 13 into the connecting tube 1 and align the locking rod 17 with the locking hole 20. Release the shaft 15, and the locking rod 17 will slide outward under the elastic force of the spring 19 and lock into the locking hole 20, thus fixing the fixing frame 13 and the filter screen 14. When removing the filter screen 14, rotate the shaft 15 in the same way to make the locking rod 17 disengage from the locking hole 20 and remove the filter screen 14. Installation and removal are convenient.

[0042] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", 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 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 this utility model.

[0043] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A disassembleable spiral duct, comprising multiple spiral duct bodies (2), characterized in that: A connecting pipe (1) is provided between two adjacent spiral duct bodies (2). The outer wall of the connecting pipe (1) is provided with two symmetrically distributed connecting mechanisms. The inside of the connecting pipe (1) is provided with a filter screen (14) through a snap-fit ​​mechanism. The connecting mechanism includes a first limiting ring (3) fixedly connected to the outer wall of the connecting pipe (1). The outer wall of the first limiting ring (3) is rotatably connected to a rotating ring (4). The outer wall of the rotating ring (4) is rotatably connected to a plurality of circumferentially distributed connecting rods (5). The other end of each of the plurality of connecting rods (5) is movably connected to a slider (6) through a hinge seat. The plurality of sliders (6) are slidably connected to the inner wall of the connecting pipe (1). The two ends of the outer wall of the spiral duct body (2) are provided with slots (7).

2. The easily disassembled spiral duct according to claim 1, characterized in that: The connecting mechanism further includes a first rotating block (8) rotatably connected to the outer wall of the first limiting ring (3) via a coupling shaft and a second rotating block (9) rotatably connected to the outer wall of the rotating ring (4) via a coupling shaft. The first rotating block (8) is rotatably connected to a threaded rod (10), and the threaded rod (10) is threadedly connected to the second rotating block (9).

3. The easily disassembled spiral duct according to claim 1, characterized in that: The snap-fit ​​mechanism includes a fixed frame (13), the filter screen (14) is fixedly connected to the outer wall of the fixed frame (13), the fixed frame (13) has two symmetrically distributed sliding grooves (18) inside, the two sliding grooves (18) are slidably connected to the inside of each sliding groove (18), the two sliding grooves (18) are each provided with a spring (19), the middle of the filter screen (14) is fixedly connected to a fixed ring, the inside of the fixed ring is rotatably connected to a rotating shaft (15), the outer wall of the rotating shaft (15) is fixedly connected to two pull ropes (16), the other ends of the two pull ropes (16) extend into the inside of the two sliding grooves (18) and are fixedly connected to the pull rods (17).

4. The easily disassembled spiral duct according to claim 3, characterized in that: The snap-fit ​​mechanism also includes a second limiting ring (11) fixedly connected to the inner wall of the connecting tube (1), and the outer wall of the second limiting ring (11) has two snap holes (20) corresponding to the snap rod (17).

5. The easily disassembled spiral duct according to claim 1, characterized in that: The end of the slider (6) near the slot (7) is set as an inclined surface, and the longitudinal section of the slot (7) is an inclined surface.

6. The easily disassembled spiral duct according to claim 4, characterized in that: The inner wall of the second limiting ring (11) is fixedly connected to a third limiting ring (12).

7. A spiral duct that is easy to disassemble according to claim 3, characterized in that: The pull rope (16) is made of steel wire.

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