A smoke curtain guide assembly and a smoke curtain

Abstract

This invention discloses a smoke curtain guide assembly and a smoke curtain, belonging to the technical field of smoke curtains. It includes a heavy-duty guide rail, a rotating cylinder, a guide groove, a spreading spring, several hooks, a gap sealing curtain, and a container. When fully extended, the spreading spring rests against the wall. Therefore, the spreading spring, slidably mounted on the rotating cylinder, causes the upper edge of the gap sealing curtain to rest against the wall, and the spreading spring, slidably mounted on the heavy-duty guide rail, causes the lower edge of the gap sealing curtain to rest against the wall, thereby achieving a seal between the gap sealing curtain and the smoke curtain. This reduces the amount of oil fumes seeping into the dining hall through the gap between the gap sealing curtain and the wall, maintaining clean air in the dining area and improving dining comfort.

Description

Technical Field

[0001] This invention relates to a smoke curtain guide assembly and a smoke curtain, and relates to the field of smoke curtain technology. Background Technology

[0002] Smoke curtains are passive fire protection systems used inside buildings to separate different areas and reduce the risk of fire spread and smoke diffusion. Smoke curtains in restaurants are a special type of building element, commonly used in establishments such as restaurants and bars, to ensure that smoke from a fire or cooking process does not spread throughout the entire restaurant, thereby improving the safety of customers and staff. These smoke curtains may have the following functions and characteristics: when a fire occurs within the building, smoke curtains can prevent the spread of smoke and harmful gases inside the building, providing safe evacuation routes. They are typically constructed from fire-resistant materials and possess a certain degree of fire resistance.

[0003] In restaurants, especially open-plan Chinese restaurants, kitchen fumes can easily spread to the dining area. One common practice is to install a smoke curtain between the kitchen and the dining area to prevent fumes from entering the dining area. However, existing smoke curtains have gaps between them and the walls, created by the thickness of the mounting plate and unavoidable during installation. Fumes can seep into the dining area through these gaps. Although the gap is small, the long hours and large volume of fumes generated in restaurant kitchens mean that a significant amount of fumes still accumulate in the dining area, especially during peak hours. Therefore, improvements to existing smoke curtains are needed to address these technical problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a smoke curtain guide component and a smoke curtain, which solves the technical problem of oil fumes entering the hall of a restaurant through the gap between the smoke curtain and the wall.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solutions.

[0006] A smoke curtain guide assembly and a smoke curtain, comprising a heavy-duty guide rail and a rotating cylinder, characterized in that it further comprises:

[0007] A guide groove is formed on the outer wall of the heavy-duty guide rail and passes through one end of the heavy-duty guide rail; the guide groove is also formed on the arc-shaped outer wall of the rotating cylinder and passes through one end of the rotating cylinder; the ends of the heavy-duty guide rail and the rotating cylinder that are penetrated are located on the same side;

[0008] An elastic expansion member includes an expansion spring and several hooks; one end of the expansion spring is fixedly connected to the closed end of a guide groove, and the other end of the expansion spring freely extends and retracts along the axis of the guide groove; one hook is fixedly connected to the freely extending and retracting end of the expansion spring, and the remaining hooks are sequentially fixedly connected to the expansion spring.

[0009] As a preferred embodiment of the present invention, the guide groove includes a first guide groove portion with a T-shaped structure and a second guide groove portion with a circular shape located below the first guide groove portion. The bottom of the first guide groove portion is connected to the top of the second guide groove portion. The hook includes a T-shaped structure portion and a connecting portion. The T-shaped structure portion is slidably engaged within the first guide groove portion and is fixedly connected to a spreading spring. The connecting portion is located outside the guide groove.

[0010] In a preferred embodiment of the present invention, the natural length of the spreading spring is L, the axial length of the second guide groove is L1, and the distance from the end of the second guide groove to the wall is L2, which must satisfy L = L1 + L2. This not only achieves a seal but also prevents the spreading spring from colliding with the wall, thus eliminating collision noise.

[0011] In a preferred embodiment of the present invention, the natural length of the spreading spring is L, the axial length of the second guide groove is L1, and the distance from the end of the second guide groove to the wall is L2, which must satisfy L > L1 + L2. When the spring is spread, it will collide with the wall, and this collision sound can be used as a basis for determining whether the gap sealing curtain is fully spread.

[0012] In a preferred embodiment of the present invention, the width of the communication opening formed by the first guide straight groove and the second guide straight groove is smaller than the inner diameter of the second guide straight groove. Since the spring is simultaneously constrained by the second guide straight groove, the sliding process of the elastic spring along the guide straight groove is more stable.

[0013] The present invention also provides a smoke curtain, including a smoke curtain, a rotating cylinder, and a heavy-duty guide rail; and further includes:

[0014] As described in Scheme 1, the smoke curtain guide assembly;

[0015] A gap-sealing curtain, which is soft and can be gathered and unfolded; the side of the smoke-blocking curtain from top to bottom is sealed and fixedly connected to a gap-sealing curtain, and the upper and lower edges of the gap-sealing curtain are fixedly connected to hooks.

[0016] The heavy-duty guide rail has an inner cavity, and the surface of the inner cavity has a through hole that communicates with the outside. A container is fixedly connected inside the inner cavity, and the container's holding cavity is connected to the inner cavity.

[0017] In a preferred embodiment of the present invention, both the inner cavity and the container are cylindrical; an annular groove is coaxially formed along the inner circumferential surface of the inner cavity, and a plurality of ball bearings are fixedly connected along the outer wall of the container.

[0018] When the container is placed inside the inner cavity, the ball bearings roll in contact with the bottom of the annular groove. Because the container filled with lime slurry or limestone granules is quite heavy, when the heavy-duty guide rail swings, the container can rotate on its own to keep the opening facing upwards, preventing the lime slurry or limestone granules from spilling out. At the same time, the container, together with the lime slurry, forms a damping function, which can reduce the swing amplitude of the heavy-duty guide rail.

[0019] As a preferred embodiment of the present invention, the container is open with the opening facing upwards to prevent lime milk or limestone particles from spilling out.

[0020] As a preferred embodiment of the present invention, the container is provided with lime milk or limestone particles, which can degrade oil fumes and adsorb carbon dioxide gas.

[0021] In a preferred embodiment of the present invention, the container contains lime slurry or limestone particles. Smoke enters the inner cavity through the through-hole, where carbon dioxide and sulfur dioxide are absorbed by the lime slurry solution, thereby reducing the toxicity of sulfur dioxide to the human body. While carbon dioxide is non-toxic, reducing its concentration also lowers the risk of suffocation. The container not only blocks smoke but also adsorbs carbon dioxide or sulfur dioxide from the air.

[0022] In a preferred embodiment of the present invention, the gap sealing curtain is part of the smoke-blocking curtain, but the lower edge of the gap sealing curtain is not fixedly connected to the heavy-duty guide rail and the upper edge of the gap sealing curtain is not fixedly connected to the rotating drum. The connection between the gap sealing curtain and the smoke-blocking curtain is more secure, with no gaps at the connection point, resulting in better sealing and greater durability.

[0023] The beneficial effects of this invention are:

[0024] After the expansion spring is fully extended, it presses against the wall. Therefore, the expansion spring, slidably mounted on the rotating drum, causes the upper edge of the gap-sealing curtain to press against the wall, while the expansion spring, slidably mounted on the heavy-duty guide rail, causes the lower edge of the gap-sealing curtain to press against the wall, thus sealing the gap between the wall and the smoke-blocking curtain. This reduces the amount of cooking fumes seeping into the dining hall through the gap between the gap-sealing curtain and the wall, maintaining clean air in the dining area and improving dining comfort. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0027] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0028] Figure 4 for Figure 2 Enlarged structural diagram at point C;

[0029] Figure 5 for Figure 3 Enlarged structural diagram at point D;

[0030] Figure 6 A schematic diagram of a heavy-duty guide rail, guide groove, hook, and expansion spring structure;

[0031] Figure 7 A schematic diagram of the guide groove, hook, and spreading spring structure;

[0032] Figure 8 This is a schematic diagram of the container structure;

[0033] Figure 9 This is a schematic diagram of the connection structure for components such as heavy-duty guide rails, annular slides, containers, and ball bearings.

[0034] In the diagram: 1. Heavy-duty guide rail; 2. Rotary drum; 3. Mounting plate; 4. Smoke curtain; 5. Guide straight groove; 501. First guide straight groove section; 502. Second guide straight groove section; 6. Extension component; 7. Spreading spring; 8. Hook; 801. T-shaped structure section; 802. Connecting part; 9. Tubular motor; 10. Gap sealing curtain; 11. Inner cavity; 12. Through hole; 13. Container; 1301. Opening; 14. Annular slide groove; 15. Connecting sleeve; 16. Ball bearing; 17. Lime slurry. Detailed Implementation

[0035] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0036] In the description of this invention, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "upper", "lower", "upper part", "lower part", "directly above", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are only for the convenience of description.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment provides a smoke curtain guide assembly, including a heavy-duty guide rail 1, a rotating cylinder 2, and mounting plates 3 rotatably mounted at both ends of the rotating cylinder 2. The top of the smoke curtain 4 is fixedly connected to the rotating cylinder 2, and the bottom of the smoke curtain 4 is fixedly connected to the heavy-duty guide rail 1. Existing heavy-duty guide rails 1 have various structures; generally, they are elongated and include two end faces and an outer wall connecting the two end faces. The accompanying drawings of this invention use a cylindrical heavy-duty guide rail 1 as an example for illustration.

[0039] like Figure 2-5 As shown, both the heavy-duty guide rail 1 and the rotating cylinder 2 are provided with guide grooves 5. The guide groove 5 is formed on the outer wall of the heavy-duty guide rail 1 and penetrates one end face of the heavy-duty guide rail 1; the guide groove 5 is formed on the arc-shaped outer wall of the rotating cylinder 2 and penetrates one end face of the rotating cylinder 2; the penetrated end faces of the heavy-duty guide rail 1 and the rotating cylinder 2 are located on the same side. During installation, the penetrated end faces of the heavy-duty guide rail 1 and the rotating cylinder 2 face the wall. The end of the guide groove 5 that penetrates the end of the heavy-duty guide rail 1 or the rotating cylinder 2 is the open end, and the end of the guide groove 5 opposite to the open end is the closed end.

[0040] like Figure 3 and Figure 5 As shown, it needs to be explained that the arc-shaped outer wall surface of the rotating cylinder 2 can be the main body of the arc-shaped outer wall surface or an extension of the arc-shaped outer wall surface. When the cylinder wall of the rotating cylinder 2 is relatively thick, the guide groove 5 can be directly formed on the arc-shaped outer wall surface of the rotating cylinder 2. When the thickness of the cylinder wall of the rotating cylinder 2 does not meet the conditions for forming the guide groove 5, an extension member 6 can be fixedly connected to the outer wall surface of the rotating cylinder 2 to increase the local wall thickness of the rotating cylinder 2. The extension member 6 is an extension plate or an extension block. The extension plate or extension block extends to be aligned with one end of the rotating cylinder 2. The outer surface of the extension member 6 serves as an extension of the arc-shaped outer wall surface of the rotating cylinder 2. The guide groove 5 is formed on the extension plate or extension block, and the guide groove 5 penetrates the end of the extension plate or extension block aligned with the rotating cylinder 2.

[0041] If one side of the smoke curtain faces the wall, only one guide groove 5 can be opened on both the heavy-duty guide rail 1 and the rotating cylinder 2; if both sides of the smoke curtain face the wall, a pair of guide grooves 5 can be opened on both the heavy-duty guide rail 1 and the rotating cylinder 2, with one guide groove 5 passing through one end of the heavy-duty guide rail 1 and the other guide groove 5 passing through the other end of the heavy-duty guide rail 1.

[0042] like Figure 4 and Figure 5 As shown, the elastic support includes a support spring 7 and several hooks 8. The hooks 8 are made of rigid polyester plastic, such as polycarbonate or epoxy resin, to reduce weight.

[0043] like Figure 5-7 As shown, the guide groove 5 includes a first guide groove portion 501 with a T-shaped cross-section, and the hook 8 includes a T-shaped structure portion 801 and a connecting portion 802. The T-shaped structure portion 801 is slidably connected within the first guide groove portion 501, and the wider groove portion of the first guide groove portion 501 is located below its narrower groove portion, thus preventing the hook 8 from detaching from the first guide groove portion 501. The connecting portion 802 protrudes from the guide groove 5 to achieve a fixed connection with the gap sealing curtain 10 in the smoke curtain wall.

[0044] The second guide groove 502 has a circular cross-section and is located below the first guide groove 501. A spreading spring 7 is disposed inside the second guide groove 502, and its outer circular surface fits against the arc-shaped wall surface of the second guide groove 502, thus allowing the second guide groove 502 to guide the spreading spring 7. One end of the spreading spring 7 is fixedly connected to the closed end of the guide groove 5, and the other end of the spreading spring 7 freely extends and retracts along the axis of the guide groove 5.

[0045] The wider section of the first guide straight groove 501 connects to the top of the second guide straight groove 502. The T-shaped structure 801 of the hook 8 passes through the connection between the first guide straight groove 501 and the second guide straight groove 502 and is fixedly connected to the expansion spring 7. One hook 8 must be fixedly connected to the freely extendable end of the expansion spring 7 to ensure that when the expansion spring 7 is extended to the point where its freely extendable end rests against the wall, the outer edge of the gap sealing curtain 10, from high to low, is flush with the wall. The remaining hooks 8 are then fixedly connected to the expansion spring 7 in sequence. Preferably, when the expansion spring 7 is in its natural state, several hooks 8 are fixedly connected to the expansion spring 7 at equal intervals, so that each hook 8 receives the same opening force from the expansion spring 7, resulting in a better opening effect.

[0046] The width of the connecting opening formed by the first guide straight groove 501 and the second guide straight groove 502 is not limited. Since the hook 8 is constrained by the first guide straight groove 501 and will not detach from it, the spreading spring 7 will also not detach from the second guide straight groove 502. Preferably, as follows... Figure 7 As shown, the width of the connection opening formed by the first guide straight groove 501 and the second guide straight groove 502 is smaller than the inner diameter of the second guide straight groove 502. In this case, the spreading spring 7 is simultaneously restricted by the second guide straight groove 502, so the sliding process of the whole consisting of the spreading spring 7 and the hook 8 along the guide straight groove 5 is more stable.

[0047] It should be explained that the disengagement of the spreading spring 7 or the hook 8 described in this embodiment does not include the case where the spreading spring 7 and the hook 8 extend out of the opening end of the guide groove 5 due to the normal opening of the spreading spring 7.

[0048] The natural length of the expansion spring 7 is L, the axial length of the second guide groove 502 is L1, and the distance from the opening of the second guide groove 502 to the wall is L2. L ≥ L1 + L2 must be satisfied, meaning that the expansion spring 7 must be fully extended and press against the wall, thereby ensuring that the expansion spring 7 drives the gap sealing curtain 10 to press against the wall, achieving a seal between the wall and the heavy-duty guide rail 1. When L = L1 + L2, not only is a seal achieved, but the expansion spring 7 will not collide with the wall, thus preventing any collision noise. When L > L1 + L2, the expansion spring 7 will collide with the wall during expansion, and this collision noise can be used as a basis for judging whether the gap sealing curtain 10 is fully expanded.

[0049] Example 2

[0050] like Figure 1 As shown, this embodiment provides a smoke curtain, including a smoke curtain 4, a rotating drum 2, a heavy-duty guide rail 1, a tubular motor 910, and a mounting plate 3. The top of the smoke curtain 4 is fixedly connected to the outer circumferential surface of the rotating drum 2, and the bottom of the smoke curtain 4 is fixedly connected to the heavy-duty guide rail 1. The tubular motor 9 is built into the rotating drum 2 to drive the rotating drum 2 to rotate and realize the rolling and unfolding of the smoke curtain 4. When not in use, the smoke curtain 4 is rolled up on the rotating drum 2; when in use, the smoke curtain 4 is unfolded and hangs down to block the diffusion of smoke. The heavy-duty guide rail 1 is long and narrow, usually made of metal to have a large weight. The heavy-duty guide rail 1 enables the smooth rolling and unfolding of the smoke curtain 4.

[0051] The gap-sealing curtain 10 is made of ceramic fiber or glass fiber and has fire-retardant properties. It is also soft and can be gathered and unfolded. The side of the smoke curtain 4 from top to bottom is sealed and fixedly connected to a gap-sealing curtain 10. The lower edge of the gap-sealing curtain 10 is flush with the smoke curtain 4, and the upper edge of the gap-sealing curtain 10 is also flush with the smoke curtain 4.

[0052] (1) The sealing and fixing connection methods between the gap sealing curtain 10 and the smoke curtain 4 include, but are not limited to, the following two:

[0053] (2) The gap sealing curtain 10 is part of the smoke curtain 4, but the lower edge of the gap sealing curtain 10 is not fixedly connected to the heavy-duty guide rail 1, and the upper edge of the gap sealing curtain 10 is not fixedly connected to the rotating drum 2.

[0054] Secondly, the gap sealing curtain 10 is sealed and fixed to the smoke curtain 4 by bonding with high-temperature resistant adhesive or sewing with high-temperature resistant flame-retardant thread. Both the high-temperature resistant adhesive and the high-temperature resistant flame-retardant thread are readily available materials.

[0055] The first option is preferred. When the gap sealing curtain 10 is part of the smoke curtain 4, the connection between the gap sealing curtain 10 and the smoke curtain 4 is more secure, there are no gaps at the connection, and the sealing effect is better.

[0056] like Figure 4 and Figure 5 As shown, the upper edge of the gap sealing curtain 10 is fixedly connected to the hook 8 slidably connected to the rotating drum 2, and the upper edge of the gap sealing curtain 10 is also fixedly connected to the hook 8 slidably connected to the heavy-duty guide rail 1. When the expansion spring 7 is in its natural state, the free end of the expansion spring 7 rests against the wall. One expansion spring 7 causes the upper edge of the gap sealing curtain 10 to rest against the wall, and the other expansion spring 7 causes the lower edge of the gap sealing curtain 10 to rest against the wall, thereby causing the gap sealing curtain 10 to fully expand to the outside of the gap sealing curtain 10 against the wall, thus sealing the gap between the gap sealing curtain 10 and the wall.

[0057] like Figure 2 As shown, the heavy-duty guide rail 1 has an inner cavity 11; the surface of the heavy-duty guide rail 1 has a through hole 12 connecting the inner cavity 11 to the outside. A container 13 is fixedly connected inside the inner cavity 11. The shape of the container 13 is not limited, but the holding cavity of the container 13 must be connected to the inner cavity 11. The container 13 is used to hold lime milk 17 or limestone particles. Oil fumes enter the inner cavity 11 through the through hole 12, and then enter the holding cavity of the container 13 to come into contact with the lime milk 17 or limestone particles. The alkaline lime milk 17 or limestone particles can decompose the oil fumes, thereby reducing the concentration of oil fumes in the air. At the same time, the lime milk 17 or limestone particles can also absorb carbon dioxide.

[0058] The container 13 can be connected to the inner cavity 11 in the following way: the container 13 is set with an open opening 1301, and the open opening 1301 of the container 13 must face upwards during installation in order to hold lime milk 17 or limestone particles.

[0059] like Figure 2 , Figure 4 and Figure 9 As shown, in some embodiments, both the container 13 and the inner cavity 11 are cylindrical; an annular groove 14 is provided along the inner circumference of the inner cavity 11;

[0060] like Figure 8 As shown, a connecting sleeve 15 is coaxially fixedly fitted onto the container 13. Several balls 16 are arranged circumferentially along the connecting sleeve 15. When the container 13 is placed inside the inner cavity 11, all the balls 16 roll in contact with the bottom of the annular groove 14. Therefore, the container 13 can rotate freely relative to the heavy-duty guide rail 1 around the axis of the inner cavity 11. Furthermore, because the container 13 filled with lime slurry 17 or limestone particles is quite heavy, when the heavy-duty guide rail 1 swings, the container 13 can maintain its opening facing upwards by rotating itself, preventing the lime slurry 17 or limestone particles from spilling out. Simultaneously, the container 13, together with the lime slurry 17, forms a damping function, reducing the swing amplitude of the heavy-duty guide rail 1.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoke screen curtain guide assembly comprising a heavy-duty guide rail (1) and a rotating drum (2), characterized in that, Further comprising: A guide straight slot (5) is opened on the outer wall surface of the heavy guide rail (1) and penetrates one end of the heavy guide rail (1); the guide straight slot (5) is also opened on the arc-shaped outer wall surface of the rotating drum (2) and penetrates one end of the rotating drum (2); the penetrated ends of the heavy guide rail (1) and the rotating drum (2) are located on the same side; An elastic expansion member includes an expansion spring (7) and a plurality of hooks (8); one end of the expansion spring (7) is fixedly connected with the closed end of the guide straight slot (5), and the other end of the expansion spring (7) is freely telescopic along the axial line direction of the guide straight slot (5); one of the hooks (8) is fixedly connected with the freely telescopic end of the expansion spring (7), and the remaining hooks (8) are sequentially fixedly connected with the expansion spring (7); The guide straight slot (5) includes a first guide straight slot part (501) in T-shaped structure and a first guide second straight slot part (502) in circular shape located below the first guide straight slot part (501), and the bottom of the first guide straight slot part (501) is in communication with the top of the first guide second straight slot part (502); the hook (8) includes a T-shaped structure part (801) and a connecting part (802), the T-shaped structure part (801) is slidingly engaged in the first guide straight slot part (501), and the T-shaped structure part (801) is fixedly connected with the expansion spring (7), and the connecting part (802) is located outside the guide straight slot (5); The natural length of the expansion spring (7) is L, the axial length of the first guide second straight slot part (502) is L1, and the distance from the penetration opening of the first guide second straight slot part (502) at the end to the wall is L2, and L≥L1+L2 is required to be satisfied; A gap sealing curtain (10) is soft and can be gathered and unfolded; the side surface of the smoke curtain (4) from top to bottom is sealingly and fixedly connected with a gap sealing curtain (10), and the upper edge and the lower edge of the gap sealing curtain (10) are fixedly connected with the hook (8).

2. A smoke screen curtain guide assembly according to claim 1, wherein, The width of the communication opening formed by the communication between the first guide straight slot part (501) and the first guide second straight slot part (502) is smaller than the inner diameter of the first guide second straight slot part (502).

3. A smoke screen curtain comprising a smoke screen curtain (4), a rotating drum (2) and a heavy rail (1), characterized in that, Further comprising: The smoke blocking vertical wall guide assembly according to any one of claims 1-2; The heavy guide rail (1) is provided with an inner cavity (11), and a through hole (12) in communication with the outside is formed in the surface of the inner cavity (11); a container (13) is fixedly connected in the inner cavity (11), and a containing cavity of the container (13) is in communication with the inner cavity (11).

4. A smoke screen curtain guide assembly according to claim 3, wherein, The container (13) is provided with an open top (1301) and the open top (1301) of the container (13) faces upward.

5. A smoke screen curtain guide assembly according to claim 3, wherein, The container (13) is provided with lime milk (17) or limestone particles.

6. A smoke screen curtain guide assembly according to claim 5, wherein, The inner cavity (11) and the container (13) are both in cylindrical shape; an annular sliding groove (14) is formed in the inner circumferential surface of the inner cavity (11) along the same axis; a plurality of rolling balls (16) are fixedly connected to the outer wall surface of the container (13); when the container (13) is placed in the inner cavity (11), the rolling balls (16) are in rolling contact with the groove bottom of the annular sliding groove (14).

7. A smoke screen curtain guide assembly according to claim 3, wherein, The gap sealing curtain (10) belongs to a part of the smoke curtain (4), but the lower edge of the gap sealing curtain (10) is not fixedly connected with the heavy guide rail (1), and the upper edge of the gap sealing curtain (10) is not fixedly connected with the rotating drum (2).

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