Chimney top anti-icing device

Abstract

The invention relates to the technical field of chimneys, and particularly discloses a chimney top anti-icing device which is used for a smoke outlet formed in the top of a chimney, the chimney top anti-icing device comprises a heat conduction ring and a flow guide ring, and the heat conduction ring is inserted into the smoke outlet of the chimney and attached to the inner wall of the smoke outlet; the flow guide ring sleeves the chimney and is a conical ring, the small-diameter end of the flow guide ring is fixedly connected with the end, located outside the smoke outlet, of the heat conduction ring, and the large-diameter end of the flow guide ring and the peripheral wall of the chimney are arranged at intervals. Water vapor in smoke is condensed into condensate on the flow guide ring, the condensate on the flow guide ring flows towards the large-diameter end of the flow guide ring and finally leaves the large-diameter end of the flow guide ring, the large-diameter end of the flow guide ring and the peripheral wall of the chimney are arranged in a spaced mode, and therefore the condensate leaving the flow guide ring cannot drop on the chimney, and the structure can effectively prevent ice at the top of the chimney from falling off. And the device is simple in structure, high in stability, convenient to maintain and repair and suitable for glass fiber reinforced plastic chimney products.

Description

Technical Field

[0001] The invention relates to the technical field of chimneys, in particular to an anti-icing device at the top of a chimney. Background Art

[0002] During the operation of the wet flue gas desulfurization system, the flue gas discharged from the chimney contains a large amount of water vapor. When the temperature is low in winter, ice forms at the chimney outlet. When the temperature rises, ice falls easily, damaging the equipment at the bottom of the chimney, causing economic losses, affecting production progress, and even posing a threat to the personal safety of inspectors at the bottom of the chimney.

[0003] For chimneys in areas with severe icing, anti-icing devices should be added in the design. The existing practice is to install heating equipment on the top, usually electric heating, water heating, etc. The equipment is bulky and unstable, and difficult to maintain and repair. It is not suitable for fiberglass chimney products. Electric heating has a greater safety hazard to non-metallic products. The water heating system is complex and unstable when it is drained from the ground to the sky.

[0004] Therefore, there is an urgent need for an anti-icing device at the top of the chimney to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-icing device for the top of a chimney to solve the problem that in the related art, electric heating or water heating is used for deicing at the smoke outlet of the chimney, the equipment is bulky and unstable, maintenance and repair are difficult, and it is not suitable for fiberglass chimney products.

[0006] The present invention provides a chimney top anti-icing device, which is used for being arranged at a smoke outlet at the top of the chimney, and comprises:

[0007] A heat-conducting ring, which is inserted into the smoke outlet of the chimney and fits with the inner wall of the smoke outlet;

[0008] A guide ring is sleeved on the chimney, the guide ring is a conical ring, the small diameter end of the guide ring is fixedly connected to one end of the heat conductive ring located outside the smoke outlet, and the large diameter end of the guide ring is spaced apart from the outer peripheral wall of the chimney.

[0009] As a preferred technical solution for the chimney top anti-icing device, the inner wall of the heat conduction ring and the outer wall of the flow guide ring are both provided with a hydrophobic layer.

[0010] As a preferred technical solution for the anti-icing device at the top of the chimney, a sealing caulking material is filled between the heat-conducting ring and the inner wall of the smoke outlet.

[0011] As a preferred technical solution for the anti-icing device at the top of the chimney, the cone angle of the guide ring is a, 10°≤a≤30°.

[0012] As a preferred technical solution of the anti-icing device at the top of the chimney, it also includes a spoiler, which is arranged in the chimney and is used to deflect the flow direction of the smoke at the smoke outlet toward the axial direction close to the chimney.

[0013] As an optimal technical solution for the anti-icing device at the top of the chimney, the spoiler is a conical ring, the large diameter end of the spoiler is fixedly connected to the inner wall of the chimney, and the small diameter end of the spoiler is located between the large diameter end of the spoiler and the heat conductive ring.

[0014] As a preferred technical solution of the chimney top anti-icing device, the guide ring includes an annular body and a plurality of sliding plates, the annular body is provided with a plurality of sinking grooves at intervals around the circumference of the annular body, and the plurality of sliding plates are arranged in the sinking grooves in a one-to-one correspondence;

[0015] It also includes a plurality of driving components, which drive the plurality of sliding plates to move along the depth direction of the trough in a one-to-one manner, so that the sliding plates have a first position and a second position. In the first position, the sliding plates extend out of the trough, and in the second position, the sliding plates retract into the trough, and the sliding plates and the annular body are flush with the side wall away from the chimney.

[0016] As a preferred technical solution of the chimney top anti-icing device, the annular body is provided with a plurality of sliding holes, and the plurality of sliding holes are arranged one by one on the bottom wall of the sink and the sliding plate opposite to each other;

[0017] The driving assembly comprises a driving member and a driving rod. One end of the driving rod passes through the sliding hole and is fixedly connected to the sliding plate. The driving member drives the driving rod to slide along the axis of the sliding hole.

[0018] As an optimal technical solution for the anti-icing device at the top of the chimney, the driving member includes a wedge block, a first elastic member, a second elastic member and a pull rope, the wedge block is arranged between the annular body and the chimney and slides with the chimney along the axial direction of the chimney, the surface of the wedge block opposite to the annular body is arranged as a driving inclined surface, and the driving inclined surface is inclined toward the axis close to the chimney from the top of the chimney to the bottom of the chimney, the other end of the driving rod abuts against the driving inclined surface, one end of the first elastic member is fixedly connected to the other end of the driving rod, and the other end abuts against the annular body, the second elastic member is arranged between the top of the chimney and the wedge block, and the two ends of the elastic member are respectively fixedly connected to the top of the chimney and the wedge block, one end of the pull rope is fixedly connected to the wedge block, and the other end of the pull rope extends to the bottom of the chimney.

[0019] As a preferred technical solution for the anti-icing device at the top of the chimney, the driving member also includes a motor and a winding wheel, the other end of the pull rope is wound around the winding wheel, and the motor is arranged at the bottom end of the chimney and drives the winding wheel to rotate.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides an anti-icing device for the top of a chimney. The anti-icing device for the top of a chimney is used for a smoke outlet arranged at the top of the chimney, and comprises a heat-conducting ring and a flow-conducting ring. The heat-conducting ring is inserted into the smoke outlet of the chimney and fits with the inner wall of the smoke outlet. The flow-conducting ring is sleeved on the chimney. The flow-conducting ring is a conical ring. The small-diameter end of the flow-conducting ring is fixedly connected to one end of the heat-conducting ring located outside the smoke outlet, and the large-diameter end of the flow-conducting ring is spaced apart from the outer peripheral wall of the chimney. The flue gas continuously emerges from the chimney from the smoke outlet along the chimney. At this time, the water vapor in the flue gas continuously condenses into condensate on the guide ring. The condensate on the guide ring flows to the large diameter end of the guide ring under the action of gravity, and finally leaves the large diameter end of the guide ring. Since the guide ring is a conical ring, the large diameter end of the guide ring is spaced apart from the outer peripheral wall of the chimney, so the condensate leaving the guide ring will not drip on the chimney, but directly drip on the ground. At the same time, the heat conduction ring is arranged in the smoke outlet. The heat conduction ring can absorb the heat in the flue gas, and then lead the heat to the guide ring, thereby effectively improving the ice on the surface of the guide ring. In summary, the structure can effectively prevent ice on the top of the chimney, and has a simple structure, strong stability, and convenient maintenance and overhaul, and can be applied to FRP chimney products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the chimney top anti-icing device in an embodiment of the present invention (the sliding plate is located in the first position);

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 Schematic diagram of the structure of the chimney top anti-icing device in an embodiment of the present invention (the sliding plate is located in the second position);

[0025] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0026] In the figure:

[0027] 100. Chimney;

[0028] 1. Thermal conductive ring;

[0029] 2. guide ring; 21. annular body; 211. sink; 212. sliding hole; 22. sliding plate;

[0030] 3. Spoiler;

[0031] 4. Driving assembly; 41. Driving member; 411. Wedge block; 4111. Driving inclined plane; 412. First elastic member; 413. Second elastic member; 414. Pull rope; 415. Motor; 42. Driving rod; 421. Rod body; 422. Pulley. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] like Figure 1 to Figure 4 As shown, this embodiment provides an anti-icing device for the top of a chimney, which is used to be arranged at the smoke outlet on the top of the chimney 100, and includes a heat conductive ring 1 and a flow guide ring 2. The heat conductive ring 1 is inserted into the smoke outlet of the chimney 100 and fits with the inner wall of the smoke outlet; the flow guide ring 2 is sleeved on the chimney 100, and the flow guide ring 2 is a conical ring. The small diameter end of the guide ring 2 is fixedly connected to the end of the heat conductive ring 1 located outside the smoke outlet, and the large diameter end of the guide ring 2 is spaced apart from the outer peripheral wall of the chimney 100. The flue gas continuously emerges from the smoke outlet of the chimney 100 along the chimney 100. At this time, the water vapor in the flue gas continuously condenses into condensate on the guide ring 2. The condensate on the guide ring 2 flows to the large diameter end of the guide ring 2 under the action of gravity, and finally leaves the large diameter end of the guide ring 2. Since the guide ring 2 is a conical ring, the large diameter end of the guide ring 2 is spaced from the outer peripheral wall of the chimney 100, so the condensate leaving the guide ring 2 will not drip on the chimney 100, but directly drip on the ground. At the same time, the heat conductive ring 1 is arranged in the smoke outlet. The heat conductive ring 1 can absorb the heat in the flue gas, and then the heat is caused to the guide ring 2, thereby effectively improving the ice on the surface of the guide ring 2. In summary, the structure can effectively prevent ice on the top of the chimney 100, and has a simple structure, strong stability, convenient maintenance and repair, and can be applied to the glass fiber reinforced plastic chimney 100 product. Specifically, the heat conductive ring 1 and the guide ring 2 are both made of metal.

[0037] Optionally, the inner wall of the heat conductive ring 1 and the outer wall of the guide ring 2 are both provided with a hydrophobic layer. In the present embodiment, this arrangement can reduce the ice hanging rate of the inner wall of the heat conductive ring 1 and the outer wall of the guide ring 2, and then the condensed water can be quickly inverted to the heat conductive plate or the guide ring 2. Specifically, the hydrophobic layer can be formed by applying a hydrophobic coating to the inner wall of the heat conductive ring 1 and the outer wall of the guide ring 2. In other embodiments, a high temperature resistant hydrophobic film layer can also be attached to the inner wall of the heat conductive ring 1 and the outer wall of the guide ring 2.

[0038] Optionally, a sealing caulking material is filled between the heat conductive ring 1 and the inner wall of the smoke outlet. In this embodiment, if there is a gap between the heat conductive ring 1 and the inner wall of the smoke outlet, the smoke will enter the gap between the heat conductive ring 1 and the inner wall of the smoke outlet, and then emerge from the gap between the guide ring 2 and the outer wall of the chimney 100. In this process, water vapor in the smoke will condense into condensate on the outer wall of the chimney 100. If the external ambient temperature is too low, the condensate will freeze on the outer wall of the chimney 100. To avoid this phenomenon, a sealing caulking material is filled in the gap between the heat conductive ring 1 and the inner wall of the smoke outlet to prevent the smoke in the chimney 100 from entering the gap between the heat conductive ring 1 and the inner wall of the smoke outlet.

[0039] Optionally, the cone angle of the guide ring 2 is a, 10°≤a≤30°. In this embodiment, if the cone angle a is too large, the chimney 100 needs to have greater rigidity. For the FRP chimney 100, if the cone angle a is too large, it is easy to cause damage to the top of the FRP chimney 100. If the cone angle a is too small, the condensate on the guide ring 2 is easy to fall on the chimney 100, resulting in the failure of the guide ring 2 to prevent the top of the chimney 100 from icing. Therefore, the value of a is between 10° and 30°. Preferably, the value of a is 20°.

[0040] Optionally, the chimney top anti-icing device further includes a spoiler 3, which is disposed in the chimney 100 and is used to deflect the flow direction of the smoke at the smoke outlet toward the axial direction close to the chimney 100. In this embodiment, the main function of the spoiler 3 is to change the flow direction of the smoke, reduce the contact between the smoke and the inner wall of the chimney 100 at the smoke outlet, and discharge the smoke directly from the smoke outlet, thereby preventing the steam in the smoke from condensing into liquid on the wall surface of the smoke outlet of the chimney 100.

[0041] As for the specific structure of the spoiler 3, optionally, the spoiler 3 is a conical ring, the large diameter end of the spoiler 3 is fixedly connected to the inner wall of the chimney 100, and the small diameter end of the spoiler 3 is located between the large diameter end of the spoiler 3 and the heat conductive ring 1. In this embodiment, the spoiler 3 with a conical ring structure can gather the smoke, thereby deflecting the smoke toward the axial direction of the chimney 100, so as to reduce the contact amount between the smoke and the smoke outlet of the chimney 100.

[0042] When the weather is too cold, the condensate condensed on the guide ring 2 freezes during the flow process, and then forms a thin frozen layer on the guide ring 2. If the frozen layer is not cleaned in time, the frozen layer will gradually thicken, which is not conducive to the subsequent diversion of the guide ring 2 and will also affect the stable operation of the ground equipment. To solve this problem, optionally, the guide ring 2 includes an annular body 21 and a plurality of sliding plates 22, the annular body 21 is provided with a plurality of grooves 211 at circumferential intervals around the annular body 21, and the plurality of sliding plates 22 are arranged one by one in the grooves 211; the chimney top anti-icing device also includes a plurality of driving components 4, the plurality of driving components 4 drive the plurality of sliding plates 22 to move along the depth direction of the grooves 211 one by one, so that the sliding plates 22 have a first position and a second position, in the first position, the sliding plates 22 extend out of the grooves 211, in the second position, the sliding plates 22 retract into the grooves 211, and make the sliding plates 22 and the annular body 21 flush with the side wall away from the chimney 100. In this embodiment, when the frozen layer is only a thin layer, the driving component 4 drives the sliding plate 22 to switch between the first position and the second position, so that the frozen layer on the surface of the guide ring 2 can be pushed down. Since the frozen layer is thinner at this time, when the frozen layer falls, its harm to the equipment under the chimney 100 is also reduced.

[0043] As for the specific structure of the driving assembly 4, the annular body 21 is optionally provided with a plurality of sliding holes 212, and the plurality of sliding holes 212 are arranged one by one on the bottom wall of the sink 211 opposite to the sliding plate 22; the driving assembly 4 includes a driving member and a driving rod 42, one end of the driving rod 42 passes through the sliding hole 212 and is fixedly connected to the sliding plate 22, and the driving member drives the driving rod 42 to slide along the axis of the sliding hole 212. In this embodiment, the driving member drives the driving rod 42 to slide in the sliding hole 212, so that the driving rod 42 can drive the sliding plate 22 to switch between the first position and the second position. Specifically, the circumference of the driving rod 42 is perpendicular to the sliding plate 22.

[0044] As for the specific structure of the driving member, the driving member may optionally include a wedge block 411, a first elastic member 412, a second elastic member 413 and a pull rope 414. The wedge block 411 is disposed between the annular body 21 and the chimney 100 and is slidably matched with the chimney 100 along the axial direction of the chimney 100. The surface of the wedge block 411 opposite to the annular body 21 is configured as a driving inclined surface 4111. From the top of the chimney 100 to the bottom of the chimney 100, the driving inclined surface 4111 is moved toward the chimney 100. 0 is tilted, the other end of the driving rod 42 abuts against the driving inclined surface 4111, one end of the first elastic member 412 is fixedly connected to the other end of the driving rod 42, and the other end abuts against the annular body 21, the second elastic member 413 is arranged between the top of the chimney 100 and the wedge block 411, and the two ends of the elastic member are respectively fixedly connected to the top of the chimney 100 and the wedge block 411, one end of the pull rope 414 is fixedly connected to the wedge block 411, and the other end of the pull rope 414 extends to the bottom end of the chimney 100. In this embodiment, the driving inclined surface 4111 of the wedge block 411 is inclined toward the axis of the chimney 100 from the top of the chimney 100 to the bottom of the chimney 100, and when a force is applied to the wedge block 411 to slide toward the bottom of the chimney 100, the wedge block 411 will drive the driving rod 42 to move away from the chimney 100, and the driving rod 42 will switch the sliding plate 22 from the second position to the first position. When the force applied to the wedge block 411 to slide toward the bottom of the chimney 100 is removed, the second elastic member 413 drives the wedge block 411 to move toward the top of the chimney 100, and at this time, the first elastic member 412 drives the driving rod 42 to move toward the chimney 100, and the sliding plate 22 is switched from the first position to the second position. Specifically, the first elastic member 412 is a compression spring, which is sleeved on the driving rod 42. The other end of the driving rod 42 is provided with an abutting convex ring, one end of the compression spring abuts against the abutting convex ring, and the other end abuts against the annular body 21. The second elastic member 413 is a tension spring. Specifically, the wedge block 411 is pulled toward the bottom end of the chimney 100 by the pull rope 414.

[0045] Optionally, the driving rod 42 includes a rod body 421 and a pulley 422, one end of the rod body 421 is fixedly connected to the sliding plate 22, and the other end is provided with a pulley 422, and the pulley 422 slides on the driving inclined surface 4111. This arrangement can reduce the friction force when the driving rod 42 and the wedge block 411 move relative to each other.

[0046] Optionally, the driving member further includes a motor 415 and a winding wheel, the other end of the pull rope 414 is wound around the winding wheel, and the motor 415 is disposed at the bottom end of the chimney 100 and drives the winding wheel to rotate. In this embodiment, the motor 415 drives the winding wheel to rotate in the forward direction, thereby causing the pull rope 414 to be wound around the winding wheel to achieve a force acting on the wedge block 411 near the bottom end of the chimney 100. The motor 415 drives the winding wheel to rotate in the reverse direction, thereby causing the pull rope 414 to be disengaged from the winding wheel to remove the force acting on the wedge block 411 near the bottom end of the chimney 100. Specifically, the motor 415 periodically drives the winding wheel to rotate forward and reverse.

[0047] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A chimney top anti-icing device, used for being arranged at a smoke outlet at the top of a chimney (100), characterized in that: include: A heat-conducting ring (1), the heat-conducting ring (1) being inserted into the smoke outlet of the chimney (100) and being in contact with the inner wall of the smoke outlet; A guide ring (2), the guide ring (2) being sleeved on the chimney (100), the guide ring (2) being a conical ring, the small diameter end of the guide ring (2) being fixedly connected to an end of the heat conductive ring (1) located outside the smoke outlet, and the large diameter end of the guide ring (2) being spaced apart from the outer peripheral wall of the chimney (100).

2. The chimney top anti-icing device according to claim 1, characterized in that: The inner wall of the heat-conducting ring (1) and the outer wall of the flow-conducting ring (2) are both provided with a hydrophobic layer.

3. The chimney top anti-icing device according to claim 1, characterized in that: A sealing material is filled between the heat-conducting ring (1) and the inner wall of the smoke outlet.

4. The chimney top anti-icing device according to claim 1, characterized in that: The cone angle of the guide ring (2) is a, 10°≤a≤30°.

5. The chimney top anti-icing device according to claim 1, characterized in that: It also comprises a spoiler (3), wherein the spoiler (3) is arranged in the chimney (100), and the spoiler (3) is used to deflect the flow direction of the smoke at the smoke outlet toward an axial direction close to the chimney (100).

6. The chimney top anti-icing device according to claim 5, characterized in that: The spoiler (3) is a conical ring, the large diameter end of the spoiler (3) is fixedly connected to the inner wall of the chimney (100), and the small diameter end of the spoiler (3) is located between the large diameter end of the spoiler (3) and the heat conductive ring (1).

7. The chimney top anti-icing device according to claim 1, characterized in that: The guide ring (2) comprises an annular body (21) and a plurality of sliding plates (22); the annular body (21) is provided with a plurality of sink grooves (211) at intervals around the circumference of the annular body (21); and the plurality of sliding plates (22) are arranged in the sink grooves (211) in a one-to-one correspondence; The invention also comprises a plurality of driving components (4), wherein the plurality of driving components (4) drive the plurality of sliding plates (22) to move along the depth direction of the trough (211) in a one-to-one manner, so that the sliding plates (22) have a first position and a second position. In the first position, the sliding plates (22) extend out of the trough (211), and in the second position, the sliding plates (22) retract into the trough (211), and the sliding plates (22) and the annular body (21) are flush with the side wall of the chimney (100).

8. The chimney top anti-icing device according to claim 7, characterized in that: The annular body (21) is provided with a plurality of sliding holes (212), and the plurality of sliding holes (212) are arranged one by one in correspondence on the bottom wall of the sink (211) opposite to the sliding plate (22); The driving assembly (4) comprises a driving member and a driving rod (42), one end of the driving rod (42) passes through the sliding hole (212) and is fixedly connected to the sliding plate (22), and the driving member drives the driving rod (42) to slide along the axis of the sliding hole (212).

9. The chimney top anti-icing device according to claim 8, characterized in that: The driving member comprises a wedge block (411), a first elastic member (412), a second elastic member (413) and a pull rope (414); the wedge block (411) is arranged between the annular body (21) and the chimney (100) and is slidably matched with the chimney (100) along the axial direction of the chimney (100); the surface of the wedge block (411) opposite to the annular body (21) is arranged as a driving inclined surface (4111); from the top end of the chimney (100) to the bottom end of the chimney (100), the driving inclined surface (4111) is inclined toward the axis of the chimney (100); The other end of the driving rod (42) is in contact with the driving inclined surface (4111), one end of the first elastic member (412) is fixedly connected to the other end of the driving rod (42), and the other end is in contact with the annular body (21), the second elastic member (413) is arranged between the top end of the chimney (100) and the wedge block (411), and the two ends of the elastic member are respectively fixedly connected to the top end of the chimney (100) and the wedge block (411), one end of the pull rope (414) is fixedly connected to the wedge block (411), and the other end of the pull rope (414) extends to the bottom end of the chimney (100).

10. The chimney top anti-icing device according to claim 9, characterized in that: The driving member further comprises a motor (415) and a winding wheel, the other end of the pull rope (414) is wound around the winding wheel, and the motor (415) is arranged at the bottom end of the chimney (100) and drives the winding wheel to rotate.

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