Fireproof component for cable reserved channel

Abstract

The present invention provides a fireproof component for a cable reserved channel, which is fixed to the entrance of the cable reserved channel in the wall. When not in use, the flip cover of the fireproof component and the wall are on the same plane, which does not affect the aesthetics of the wall. When it is necessary to lay pipelines in the cable reserved channel, after opening the flip cover, the power disk on the main body of the fireproof component is rotated, so that the rotating blades originally covering the installation through-hole move from the center to the surroundings, so that the aperture of the installation through-hole gradually becomes larger. When the size of the installation through-hole can adapt to the size of the cable, the cable can be passed through the installation through-hole and into the cable reserved channel in the wall to complete the cable arrangement. The component can quickly open a channel with a diameter similar to that of the cable that needs to pass through, avoiding the emergency task of temporarily opening a channel when needed on site. The component is equipped with a fire-expanding material. In the event of a fire, the original channel can be blocked by the expansion characteristics of the material to prevent the spread of fire and smoke.

Description

Technical Field

[0001] The present invention relates to the technical field of wall cable channels, in particular to a fireproof component for a reserved cable channel. Background Art

[0002] Reserving cable channels in walls is a common phenomenon in nuclear power plants. That is, a channel for passing cables is reserved in advance inside the wall, and the entrance to the channel is blocked on the outer surface of the wall. When electricity is needed during maintenance or overhaul, the entrance to the channel on the wall is opened, and the cables can be directly passed through the reserved channel, thus avoiding the emergency work of temporarily opening the channel later.

[0003] Currently, nuclear power plants lack a standardized or effective method for sealing the entrances to wall-mounted cable passages. When cables need to be routed, the passages can be quickly opened and adjusted to suit the cable's thickness. When not needed, they can be quickly closed. Furthermore, nuclear power plants require these passages to meet fire safety requirements and, when in use, to leave no visible openings after cables have passed through them, to prevent animals like rats from passing through and causing adverse effects. Summary of the Invention

[0004] The present invention provides a fireproof component for a cable reserved channel, which is fixed to the entrance of the cable reserved channel in the wall. When not in use, the flip cover of the fireproof component and the wall surface are on the same plane, which does not affect the aesthetics of the wall. When it is necessary to lay pipelines in the cable reserved channel, the flip cover is opened and the power disk on the fireproof component body is rotated, so that the rotating blades originally covering the installation through hole move from the center to the surrounding areas, so that the aperture of the installation through hole gradually becomes larger. When the size of the installation through hole can adapt to the size of the cable, the cable can be passed through the installation through hole and enter the cable reserved channel in the wall, thereby completing the cable arrangement.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A fireproof component for a cable reserved channel, comprising: a fixed chassis, comprising a horizontal base and an annular boss, the horizontal base being provided with a mounting through hole, the annular boss being extended outward perpendicularly to the horizontal base along the outer diameter of the mounting through hole, the horizontal base being used to be fixed on a wall, and the annular boss being extended into the cable reserved channel; a fireproof component body being fixed on the outer side of the horizontal base, a plurality of rotating blades being provided at the center of the fireproof component body, the rotating blades covering the mounting through hole, and the aperture of the mounting through hole being gradually increased or decreased from the center by rotating the rotating blades; a flip cover being rotatably connected to the horizontal base via a rotating shaft, and when closed, the flip cover covers the main body of the fireproof component.

[0007] Furthermore, the fireproof component body includes: a gear fixing plate, which is a circular plate with a channel hole in the center, the channel hole is consistent with the aperture of the mounting through hole, and the center of the circle coincides with that of the circle, and a plurality of movable holes are evenly arranged on the plane of the gear fixing plate in the circumferential direction, and the movable holes are long strip-shaped through holes; a plurality of rotating blades are arranged on the inner plane of the gear fixing plate, and the number of the rotating blades is consistent with the number of the movable holes. After the plurality of rotating blades are closely arranged with each other, a circular plane composed of a plurality of fans is covered on the channel hole, and a movable shaft is arranged on the outside of the rotating blade and perpendicular to the rotating blade, and the movable shaft passes through the movable hole and can move along the movable hole, thereby driving the rotating blade to rotate; a rotating gear main plate is provided along the outer circumference of the gear fixing plate, and a plurality of power plates matching the gears of the rotating gear main plate are provided on the outside of the rotating gear main plate.

[0008] Preferably, the number of the rotating blades is 4 to 8.

[0009] Furthermore, there are two power disks, which are respectively arranged at two ends of the same diameter of the rotating gear main disk, and the diameter of the power disk is smaller than the diameter of the rotating gear main disk.

[0010] Furthermore, the movable holes are evenly arranged along the diameter direction of the gear fixing plate, and the length is one third to one quarter of the diameter of the gear fixing plate.

[0011] Furthermore, a composite layer is attached to the inner side wall of the annular boss, and the composite layer can expand when heated to block the inner cavity of the annular boss.

[0012] Furthermore, the composite layer includes an expanding fireproof sealant layer, a graphite expanding layer and a protective layer from the outside to the inside, the expanding fireproof sealant layer is coated on the inner wall of the annular boss, the graphite expanding layer is bonded between the expanding fireproof sealant layer and the protective layer, and the protective layer is a polymer fireproof material.

[0013] Furthermore, the protective layer includes 10-20% of pentaerythritol, 30-50% of polyacrylamide, 15-35% of melamine, and 1-5% of pentaerythritol phosphate.

[0014] A method for using a fireproof component for a cable reserved channel comprises the following steps:

[0015] (1) Fix the fireproof assembly to the cable reserved channel entrance on the wall, wherein the horizontal base is fixed to the wall

[0016] On the surface, the annular boss extends into the interior of the cable reserved channel;

[0017] (2) Turn the power disc. The two power discs rotate in opposite directions, driving the gear fixed disc to rotate clockwise, thus

[0018] The rotating blades are moved closer to the center of the channel hole, and several rotating blades are tightly connected to each other to cover the channel hole;

[0019] (3) Put on the flip cover and fix it on the horizontal base with bolts. The outer surface of the flip cover is aligned with the horizontal base.

[0020] The walls are on the same plane;

[0021] (4) When the cable reserved channel is needed, open the flip cover, turn the power disk, and drive the gear fixing disk counterclockwise.

[0022] Rotate so that the rotating blade moves away from the center of the channel hole, and adjust the aperture of the channel hole according to the diameter of the cable.

[0023] Furthermore, when the temperature in the cavity is greater than 80° C., the composite material gradually expands and blocks the inner cavity of the annular boss.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The fireproof component of the present application is used to seal the entrance of the cable reserved channel in the wall. When there is no need to arrange cables in the cable reserved channel in the wall, the flip cover of the fireproof component is covered, which can maintain the integrity of the wall without affecting the appearance of the wall.

[0026] 2. The fireproof component has an ingenious structure and the size of the channel hole can be adjusted. By turning the rotating blades, the component can quickly open a channel with a diameter similar to the cable that needs to pass through without a large gap, avoiding the emergency task of temporarily opening a channel when needed on site.

[0027] 3. The component is equipped with fire-expanding materials. In the event of a fire, the expansion characteristics of the material can block the original channel to prevent the spread of fire and smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a fireproof component for a cable reserved channel of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the fixed chassis of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the gear fixing plate of the present invention;

[0031] Figure 4 This is a schematic structural diagram of the back side of the gear fixing plate of the present invention;

[0032] Figure 5 It is a structural diagram of the front side of the gear fixing plate;

[0033] Figure 6 This is a schematic structural diagram of the fire protection assembly of the present invention when the rotating blades are opened;

[0034] Figure 7 It is a structural schematic diagram of the rotary blade of the present invention;

[0035] Figure 8 It is a schematic diagram of the cross-sectional structure of the circular annular boss of the present invention.

[0036] The following are the descriptions of the reference numerals:

[0037] 1. Fixed chassis; 2. Fireproof component body; 3. Flip cover; 11. Horizontal base; 12. Annular boss; 21. Gear fixing plate; 22. Rotating blades; 23. Rotating gear main plate; 24. Power plate; 110. Mounting through hole; 111. Center groove; 112. Side groove; 113. Flip cover connector; 114. Flip cover fixing cover; 121. Expanding fireproof sealant layer; 122. Graphite expansion layer; 123. Protective layer; 211. Passage hole; 212. Movable hole; 221. Movable shaft; 222. Origin; 223. Short connecting edge; 224. Long connecting edge; 225. Outer edge. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings:

[0039] Figure 1 The present invention is a schematic diagram of the overall structure of a fireproof component for a cable reserved channel, including a fixed chassis 1, through which the fireproof component is fixed to the entrance of the cable reserved channel in the wall. The fixed chassis includes a horizontal base 11 and an annular boss 12. The horizontal base is installed on the wall surface, and can be embedded in the wall surface or installed outside the wall surface. A mounting hole 110 is provided on the horizontal base, through which the cable is extended from outside the wall into the wall surface. Starting from the outer diameter of the mounting hole, the annular boss is formed after extending outward perpendicularly to the horizontal base. The annular boss is used to extend into the cable reserved channel. Preferably, the outer wall of the annular boss fits the inner wall of the cable reserved channel, and the aperture of the mounting hole is substantially the same as the cross-sectional size of the cable reserved channel in the wall. Alternatively, the aperture of the mounting hole is smaller than the cross-sectional size of the cable reserved channel. Furthermore, the horizontal base and the annular boss can be integrally formed, or can be welded or fixed with bolts.

[0040] A fireproof assembly body 2 is mounted on the outer surface of the horizontal base and is embedded in the horizontal base. The fireproof assembly body comprises: a gear fixing plate 21, a passage hole 211 being provided at the center thereof, the passage hole having the same diameter as the mounting through hole and completely coinciding with the mounting through hole; a plurality of movable holes 212 being evenly arranged in the circumferential direction on the plane of the gear fixing plate, the movable holes being elongated through holes;

[0041] A plurality of rotating blades 22 are arranged on the inner plane of the gear fixing plate. The number of rotating blades is consistent with the number of the movable holes. After the plurality of rotating blades are closely arranged with each other, a circular plane composed of several sectors is covered on the channel hole. A movable shaft 221 is arranged on the outside of the rotating blade and perpendicular to the rotating blade. The movable shaft passes through the movable hole and can move along the movable hole, thereby driving the rotating blade to rotate; when the rotating blades are close to each other and in a closed state, the rotating blades cover the mounting through hole. By moving the rotating blades, the aperture of the mounting through hole is gradually increased or decreased from the center.

[0042] A rotating gear main plate 23 is fixed along the outer circumference of the gear fixing plate. Several power plates 24 matching the gears of the rotating gear main plate are arranged on the outside of the rotating gear main plate. The power plate can be one, or preferably two, which are respectively arranged at the two ends of the same diameter of the rotating gear main plate. The diameter of the power plate is smaller than the diameter of the rotating gear main plate. When needed, the power plate is rotated to drive the rotating gear main plate to rotate.

[0043] One end of the horizontal base is connected to a flip cover 3 via a rotating shaft. When the flip cover is opened, the fireproof component body is exposed, and the diameter of the mounting hole is adjusted to pass the cable through the mounting hole. When not in use, the flip cover is closed so that the flip cover and the wall are on the same level, keeping the wall intact and beautiful.

[0044] The following is a further detailed description of each device within the present invention.

[0045] Figure 2 This is a schematic diagram of the fixed chassis structure. The horizontal base of the fixed chassis is a disc-shaped structure with grooves. The central groove 111 is used to accommodate the gear fixing plate, and the side grooves 112 connected to the central groove are used to accommodate the power plate. The through hole in the center of the horizontal base is the mounting hole. A flip cover connector 113 is located on the outside of the horizontal base, and a pin rotatably connects the flip cover to the horizontal base. A flip cover fixing 114 is located at the other end of the horizontal base. When the flip cover is closed, the screws on the inside of the flip cover pass through the through holes in the fixing, and then a nut is used to secure the flip cover to the horizontal base.

[0046] Figure 3This is a schematic diagram of the structure of a gear fixing plate. The center of the gear fixing plate is a passage hole 211. Several elongated movable holes 212 are evenly distributed across the plane of the gear fixing plate. The movable shaft of the rotating blade can reciprocate within these movable holes. The width of the movable holes matches the movable shaft, and the length corresponds to the movable shaft's motion trajectory. Therefore, the movable holes are as long as possible on the gear fixing plate to ensure a larger area of the passage holes is exposed when the rotating blade is fully opened. To ensure that the movable shaft of the rotating blade can move within the movable holes as the gear fixing plate rotates, the movable holes are evenly spaced along the diameter of the gear fixing plate. That is, the starting and ending points of the movable holes are on the same diameter of the gear fixing plate. A circle of bosses is provided on the outside of the gear fixing plate. A rotating gear main plate is located along the outer circumference of the bosses. This rotating gear main plate facilitates the use of external force to drive the gear fixing plate to rotate.

[0047] Figure 4 This is a structural diagram of the rotating blades installed on the back of the gear fixing plate. The rotating blades are composed of an origin, a short connecting side, a long connecting side and an outer edge. The short connecting side and the long connecting side are two rays starting from the origin. The length of the long connecting side is greater than the short connecting side. The outer edge is used to connect the arc or straight line formed by the end points of the short connecting side and the long connecting side. When the channel hole is closed by the rotating blades, the origins of several rotating blades move closer to the center of the channel hole, and the short connecting sides and long connecting sides of two adjacent rotating blades overlap in sequence. In this embodiment, there are 6 rotating blades. After closing, the rotating blades cover the channel hole. Figure 5 As shown in the diagram, when the rotating blades are in the closed state, the structure on the front of the gear fixed plate, from the front, the six rotating blades form a circle composed of six sectors, covering the channel hole. The number of rotating blades is preferably 4 to 8.

[0048] Figure 6 This is a structural diagram of the rotating blades of the fire protection component when they are opened. Open the flip cover to expose the main body of the fire protection component. The origin of the rotating blades moves away from the channel hole, and a polygonal through hole is exposed in the channel hole. For example, if it is composed of 6 rotating blades, the channel hole is a regular hexagon. When there are more blades, the channel hole is closer to a circle and can better match the shape of the cable. However, the more blades there are, the smaller the aperture of the channel hole will be. After testing, 6 blades are the most suitable, which can make the channel hole as large as possible. At the same time, after the cable passes through the channel hole, the gap between the cable and the channel hole is smaller, which prevents foreign objects (such as mice, etc.) from entering the reserved cable channel during use, causing hidden dangers.

[0049] Furthermore, a composite layer is bonded to the inner side wall of the annular boss, and the composite layer can expand when heated to block the internal cavity of the annular boss. The composite layer includes, from the outside to the inside, an expanding fireproof sealant layer 121, a graphite expanding layer 122 and a protective layer 123. The expanding fireproof sealant layer is coated on the inner side wall of the annular boss, and the graphite expanding layer is bonded between the expanding fireproof sealant layer and the protective layer. The protective layer is a polymer fireproof material.

[0050] When heated, the air and water molecules within the graphite expansion layer expand, forming a lightweight, loose material that expands by more than 100 times. While this large expansion ratio provides excellent thermal insulation, it also lacks mechanical strength and easily disintegrates under flames. Therefore, a protective layer is applied to the outside of the graphite expansion layer. This protective layer, composed of a polymer chemical composition, offers excellent strength, but its expansion coefficient is lower than that of the graphite expansion layer. The combination of these two layers provides excellent fire protection. The protective layer comprises 10-20% polypentaerythritol, 30-50% polyacrylamide, 15-35% melamine, and 1-5% pentaerythritol phosphate. The polypentaerythritol forms a three-dimensional structure for the protective layer, providing a skeletal support and making it non-flammable. At high temperatures, polyacrylamide acts as a dehydration catalyst, dehydrating the polymer compounds in the protective layer to form a non-flammable three-dimensional carbide structure. This reduces the production of flammable tar, aldehydes, and other toxic gases from thermal decomposition. Furthermore, at high temperatures, it absorbs heat and releases non-flammable gases such as nitrogen and water. Melamine foams at high temperatures, increasing the volume of the protective layer and decomposing non-flammable gases, thereby inhibiting combustion.

[0051] Example 2

[0052] A method for using a fireproof component for a cable reserved channel comprises the following steps:

[0053] Fix the fireproof assembly to the cable reserved channel entrance on the wall, wherein the horizontal base is fixed on the wall.

[0054] The annular boss extends into the interior of the cable reserved channel; when it is not in use, the power disk is rotated with a wrench or other tool, and the two power disks rotate in opposite directions, driving the gear fixing disk to rotate clockwise, so that the rotating blades move closer to the center of the channel hole. After several rotating blades are tightly connected to each other, the channel hole is covered, and a flip cover is put on, and the flip cover is fixed to the horizontal base with bolts and nuts.

[0055] To use the cable channel, open the flip cover and rotate the power disc, which drives the gear fixing disc counterclockwise, moving the rotating blades away from the center of the channel hole. Adjust the channel hole diameter according to the cable diameter and pass the cable through the hole. Fireproof components are installed at the entrance and exit of the cable channel to facilitate cable routing within the wall.

[0056] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A fireproof component for a cable reserved channel, characterized in that: include: The fixed chassis includes a horizontal base and a circular boss. The horizontal base is provided with a mounting through-hole. The circular boss is extended outward perpendicularly to the horizontal base along the outer diameter of the mounting through-hole. The horizontal base is used to be fixed on the wall, and the circular boss is extended into the cable reserved channel. The fireproof assembly body is fixed to the outer surface of the horizontal base. A plurality of rotating blades are provided at the center of the fireproof assembly body. The rotating blades cover the mounting through-holes. By rotating the rotating blades, the aperture of the mounting through-holes is gradually increased or decreased from the center. A flip cover is rotatably connected to the horizontal base via a rotating shaft, and when closed, the flip cover covers the main body of the fireproof assembly; A composite layer is attached to the inner side wall of the annular boss, and the composite layer can expand when heated to block the inner cavity of the annular boss; The composite layer includes, from the outside to the inside, an intumescent fireproof sealant layer, a graphite intumescent layer and a protective layer, wherein the intumescent fireproof sealant layer is coated on the inner side wall of the annular boss, the graphite intumescent layer is bonded between the intumescent fireproof sealant layer and the protective layer, and the protective layer is a polymer fireproof material; The protective layer comprises 10-20% of pentaerythritol, 30-50% of polyacrylamide, 15-35% of melamine, and 1-5% of pentaerythritol phosphate; When the graphite expansion layer is heated, the air and water molecules in the cavity will expand, thereby forming a lightweight loose material, which expands more than 100 times. The graphite expansion layer has a large expansion multiple; a protective layer is attached to the outside of the graphite expansion layer, and the protective layer is a polymer chemical composition; When the temperature in the cavity is greater than 80°C, the composite material gradually expands and seals the internal cavity of the annular boss with a gear fixing disk. The gear fixing disk is a circular disk with a passage hole in the center. The passage hole has the same diameter as the mounting through hole and their centers coincide with each other. A plurality of movable holes are evenly arranged in the circumferential direction on the plane of the gear fixing disk. The movable holes are elongated through holes. A plurality of rotating blades are provided on the inner plane of the gear fixing plate, wherein the number of the rotating blades is consistent with the number of the movable holes. When the rotating blades are closely arranged, a circular plane composed of a plurality of sectors is formed to cover the channel hole. A movable shaft is provided on the outer side of the rotating blades and perpendicular to the rotating blades. The movable shaft passes through the movable hole and can move along the movable hole, thereby driving the rotating blades to rotate; A rotating gear main plate is provided along the outer circumference of the gear fixing plate, and a plurality of power plates matching the gears of the rotating gear main plate are provided on the outer side of the rotating gear main plate; there are two power plates, which are respectively provided at both ends of the same diameter of the rotating gear main plate, and the diameter of the power plates is smaller than the diameter of the rotating gear main plate, and the two power plates rotate in opposite directions; The movable holes are evenly arranged along the diameter direction of the gear fixing plate, and the length thereof is one third to one quarter of the diameter of the gear fixing plate.

2. A fireproof assembly for a cable reserved channel according to claim 1, characterized in that: The number of the rotating blades is 4 to 8.

3. A method for using a fireproof assembly for a cable reserved channel, comprising the fireproof assembly according to any one of claims 1 to 2, characterized in that: The following steps are involved: (1) Fixing the fireproof assembly to the entrance of the cable reserved channel on the wall, wherein the horizontal base is fixed on the wall and the annular boss extends into the interior of the cable reserved channel; (2) Rotate the power discs. The two power discs rotate in opposite directions, driving the gear fixed disc to rotate clockwise, so that the rotating blades move closer to the center of the channel hole. After several rotating blades are tightly connected, they cover the channel hole. (3) Put on the flip cover and fix the flip cover to the horizontal base with bolts, so that the outer surface of the flip cover is on the same plane as the wall; (4) When the cable reserved channel is needed, open the flip cover, turn the power disk, and drive the gear fixed disk to rotate counterclockwise, so that the rotating blade moves away from the center of the channel hole, and adjust the aperture of the channel hole according to the diameter of the cable.

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