A fire shield and a fire protection device

Abstract

The application relates to the technical field of fireproof equipment, and discloses a fireproof cover and a fireproof device, wherein the fireproof cover comprises a cover body, a window cover, an intumescent fireproof coating layer and a first heat insulation layer; the cover body comprises a main body part and a reinforcing part, the main body part is provided with a containing cavity, the reinforcing part is connected to the outer wall of the main body part, and the cover body is provided with a window; one end of the window cover is movably connected with the cover body; the intumescent fireproof coating layer is connected to the reinforcing part and located between the reinforcing part and the window cover; the inner wall of the main body part and the inner wall of the window cover are both connected with the first heat insulation layer; the fireproof cover provided by the application can improve the strength of the window position of the fireproof cover and the sealing performance between the cover body and the window cover through the reinforcing part and the intumescent fireproof coating layer, so that the fireproof cover can block the high-temperature smoke gas of fire through the window position, and the reliability of the fireproof cover is improved.

Description

Technical Field

[0001] This invention relates to the field of fire protection equipment technology, and in particular to a fireproof cover and fireproof device. Background Technology

[0002] Fireproof covers are enclosures made of various fire-resistant materials, which can isolate fire sources and protect internal items from the effects of fire. Existing fireproof covers have windows with openable or closable covers for routine inspection and maintenance of equipment inside the fireproof cover and emergency operations in case of an emergency. However, the location of the windows in the fireproof cover may become a weak point in a fire, easily developing cracks that allow high-temperature smoke to enter the fireproof cover, thus causing the fireproof cover to fail and reducing its reliability. Summary of the Invention

[0003] In order to at least solve one of the technical problems existing in the prior art, the present invention provides a fireproof cover and a fireproof device having the fireproof cover, wherein the fireproof cover can prevent high-temperature smoke from entering the interior of the fireproof cover through the window position, thereby improving the reliability of the fireproof cover.

[0004] To achieve the above objectives, the present invention provides a fireproof cover, comprising a cover body, a window cover, an intumescent fire-retardant coating layer, and a first heat insulation layer; the cover body includes a main body and a reinforcing part, the main body having an accommodating cavity, the reinforcing part being connected to the outer wall of the main body, and the cover body having a window that passes sequentially through the reinforcing part and the main body along a first direction; one end of the window cover is movably connected to the cover body and is capable of opening or closing the window; the intumescent fire-retardant coating layer is connected to the side wall of the reinforcing part away from the window and is located between the reinforcing part and the window cover; the inner wall of the main body and the inner wall of the window cover are both connected to the first heat insulation layer.

[0005] In some embodiments, the end of the window cover facing the window is recessed in a direction away from the window, the recess having a first bottom wall and a first side wall connected to the first bottom wall, the projection of the first bottom wall at least covering the window along the first direction, and the intumescent fire-retardant coating layer being disposed between the reinforcing part and the first side wall.

[0006] In some embodiments, the cover further includes an extension having a first end and a second end opposite to each other. The first end is connected to the end of the reinforcing portion away from the main body, and the second end extends away from the window. A receiving groove is formed between the main body, the reinforcing portion, and the extension. The intumescent fire-retardant coating layer is disposed in the receiving groove, and a first gap is formed between the second end and the first sidewall. The intumescent fire-retardant coating layer has the following states: a first state, in which a second gap is formed between the intumescent fire-retardant coating layer and the first sidewall; and a second state, in which the end of the intumescent fire-retardant coating layer away from the reinforcing portion contacts the first sidewall.

[0007] In some embodiments, the thickness of the intumescent fire-retardant coating layer in the first state is a, and the length of the second interval is b, satisfying: a≤b≤2a, from the first end to the second end.

[0008] In some embodiments, the wall surface of the reinforcing part located within the receiving groove is the bottom surface of the receiving groove, and the intumescent fire-retardant coating layer covers the bottom surface of the groove.

[0009] In some embodiments, along the first direction, the length of the reinforcing portion is L1, the thickness of the extension portion is H, and the length of the first sidewall is L2, satisfying: 0.5L1+0.5H<L2<L1+H.

[0010] In some embodiments, the first heat insulation layer includes a nano-aerogel felt layer and an aluminum foil layer. The number of nano-aerogel felt layers is multiple, and the multiple nano-aerogel felt layers are stacked sequentially along the thickness direction of the first heat insulation layer. The aluminum foil layer is provided between two adjacent nano-aerogel felt layers.

[0011] In some embodiments, the thickness of the nano-aerogel felt layer is W1, and the thickness of the aluminum foil layer is W2, satisfying: 4mm≤W1≤50mm; 0.08mm≤W2≤0.2mm.

[0012] In some embodiments, the main body includes a housing and a base plate, one end of the housing is open to form an opening, the base plate covers the opening and is connected to the housing to form the receiving cavity; the inner wall of the housing is connected to the first heat insulation layer, and the inner wall of the base plate is connected to the first heat insulation layer.

[0013] In some embodiments, the valve actuator includes an electric actuator and a drive shaft, one end of which is connected to the electric actuator and the other end to the valve, and includes a fireproof cover as described in any of the above embodiments, and also includes a fireproof sleeve; the accommodating cavity is used to accommodate the electric actuator, and the cover has a first through hole communicating with the accommodating cavity, the first through hole being used for the drive shaft to pass through; the fireproof sleeve is sleeved on the drive shaft.

[0014] Compared with the prior art, the fireproof cover provided by the present invention has the following advantages: (1) By setting the reinforcing part on the outer wall of the main body and opening the window sequentially on the reinforcing part and the main body, the strength of the fireproof cover at the window location can be improved, and the possibility of cracks at the window location in a fire can be reduced. By setting the intumescent fireproof coating layer between the reinforcing part and the window cover, when a fire occurs, the intumescent fireproof coating layer can expand upon contact with fire and fill the gap between the reinforcing part and the window cover and the cracks that may be caused by fire at the window location. Furthermore, by applying the intumescent fire-retardant coating to the outer wall of the reinforcing part, the thickness of the fireproof cover in the thickness direction of the reinforcing part can be increased, thereby improving the strength of the fireproof cover at the window position and further reducing the possibility of cracks forming at the window position during a fire. Therefore, the fireproof cover provided by the present invention, through the reinforcing part and the intumescent fire-retardant coating layer, can not only improve the strength of the fireproof cover at the window position, but also improve the sealing between the cover body and the window cover, thereby achieving the purpose of blocking high-temperature smoke from the fire through the window position and improving the reliability of the fireproof cover.

[0015] (2) By setting the heat insulation layer on the inner wall of the main body and the inner wall of the window cover, the heat insulation layer can not only insulate heat to prevent external heat from entering the cavity, but also provide a certain support for the main body and the window cover to strengthen the strength of the main body and the window cover.

[0016] Compared with the prior art, the fire protection device provided by this invention has the following advantages: In the event of a fire, the fireproof cover can block high-temperature smoke and heat from entering the accommodating cavity to protect the electric actuator from fire, and the fireproof sleeve can protect the transmission shaft from air intake fire, thus preventing the high temperature of the fire from being conducted to the electric actuator through the transmission shaft. Therefore, the fire protection device provided by this invention can provide comprehensive protection for the electric actuator through the fireproof cover and the fireproof sleeve, ensuring that the temperature of the electric actuator remains below its own safe temperature even in a fire, thereby ensuring that the electric actuator can work normally even in a fire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fireproof cover in the locked state according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the second structure of a fireproof cover in the unlocked state according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of a fireproof cover provided in an embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of point A;

[0021] Figure 5 This is a schematic diagram showing the dimensional relationship of a fireproof cover provided in an embodiment of the present invention;

[0022] Figure 6 yes Figure 3 A schematic diagram of removing the intumescent fire-retardant coating layer at point A;

[0023] Figure 7 This is a structural schematic diagram of a fire prevention device provided in an embodiment of the present invention;

[0024] Figure 8 This is an exploded view of a fire prevention device provided in an embodiment of the present invention;

[0025] Figure 9 This is a structural diagram of the base plate provided in an embodiment of the present invention;

[0026] Figure 10 This is a cross-sectional view of the fireproof sleeve provided in an embodiment of the present invention.

[0027] In the picture, 100 is a fireproof cover.

[0028] 1. Cover; 11. Main body; 12. Reinforcing part; 13. Extension part; 14. Window; 15. Receiving groove; 16. Receiving cavity; 111. Shell; 112. Base plate; 131. First end; 132. Second end; 1121. First through hole; 1122. Second through hole;

[0029] 2. Window cover; 21. Recess; 211. First bottom wall; 212. First side wall; 213. First partition; 214. Second partition; 215. Third partition;

[0030] 3. Intumescent fire-retardant coating layer;

[0031] 4. First insulation layer; 41. Nano-aerogel felt layer; 42. Aluminum foil layer;

[0032] 5. First latch;

[0033] 6. Second latch;

[0034] 200. Fireproof sleeve; 201. Cylinder body; 202. Second insulation layer;

[0035] 300. Valve actuator; 301. Electric actuator; 302. Drive shaft; 303. Handwheel;

[0036] 304. Instruments; 305. Flanges;

[0037] 400. Valves;

[0038] 500, Pipeline;

[0039] 600, bracket;

[0040] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0041] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 invention 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 invention.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] like Figure 1-6 As shown, a preferred embodiment of the fireproof cover of the present invention includes a cover body 1, a window cover 2, an intumescent fireproof coating layer 3, and a first heat insulation layer 4. The cover body 1 includes a main body 11 and a reinforcing part 12. The main body 11 has an accommodating cavity 16. The reinforcing part 12 is connected to the outer wall of the main body 11. The cover body 1 has a window 14 that passes through the reinforcing part 12 and the main body 11 in sequence along a first direction X. One end of the window cover 2 is movably connected to the cover body 1 and can open or close the window 14. The intumescent fireproof coating layer 3 is connected to the side wall of the reinforcing part 12 away from the window 14 and is located between the reinforcing part 12 and the window cover 2. The inner wall of the main body 11 and the inner wall of the window cover 2 are both connected with the first heat insulation layer 4.

[0047] Based on this technical solution, by providing a reinforcing part 12 on the outer wall of the main body 11 and sequentially opening the window 14 between the reinforcing part 12 and the main body 11, the strength of the fireproof cover 100 at the location of the window 14 can be improved, reducing the possibility of cracks forming at the location of the window 14 during a fire. By providing an intumescent fire-retardant coating layer 3 between the reinforcing part 12 and the window cover 2, in the event of a fire, the intumescent fire-retardant coating layer 3 can expand upon contact with fire and fill the gap between the reinforcing part 12 and the window cover 2, as well as any cracks that may form at the location of the window 14 due to the fire. Furthermore, by providing an intumescent fire-retardant coating layer 3... The thickness of the fireproof cover 100 in the thickness direction of the reinforcing part 12 can be increased on the outer wall of the reinforcing part 12, thereby increasing the strength of the fireproof cover 100 at the window 14 position and further reducing the possibility of cracks forming at the window 14 position in a fire. Therefore, the fireproof cover 100 provided by the present invention, through the reinforcing part 12 and the intumescent fireproof coating layer 3, can not only increase the strength of the fireproof cover 100 at the window 14 position, but also improve the sealing between the cover body 1 and the window cover 2, thereby achieving the purpose of blocking high-temperature smoke from the fire through the window 14 position and improving the reliability of the fireproof cover 100.

[0048] In this embodiment, the cover 1 is made of stainless steel. Stainless steel has good strength and can provide a certain degree of explosion protection, so that the fireproof cover 100 can be used in some installation locations with explosion protection requirements.

[0049] In this embodiment, one end of the window cover 2 is hinged to the cover body 1 via a hinge.

[0050] In other embodiments, the window cover can also be connected to the cover 1 by any movable connection method such as sliding connection or pivot connection, which is not limited here.

[0051] It also includes a first latch 5 and a second latch 6. The first latch 5 is connected to the cover 1, and the second latch is connected to the window cover 2. The first latch 5 can be locked or unlocked with the second latch 6.

[0052] The first direction X, the second direction Y, and the third direction Z intersect each other.

[0053] In this embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other and correspond to the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.

[0054] The end of the window cover 2 facing the window 14 is recessed in a direction away from the window 14 and has a groove 21. The groove 21 has a first bottom wall 211 and a first side wall 212 connected to the first bottom wall 211. Along the first direction X, the projection of the first bottom wall 211 at least covers the window 14. The intumescent fireproof coating layer 3 is disposed between the reinforcing part 12 and the first side wall 212.

[0055] In this embodiment, the end of the first sidewall 212 away from the second latch 6 is hinged to the main body 11 via a hinge.

[0056] A groove 21 is provided in the window cover 2, which can be used to cover the window 14 with the first bottom wall 211 to close the window 14. At the same time, the intumescent fire retardant coating layer 3 is placed between the first side wall 212 and the reinforcing part 12, which also allows the intumescent fire retardant coating to have a gap with the first side wall 212 before it is exposed to fire. This ensures that the intumescent fire retardant coating layer 3 will not interfere with the window cover 2 before a fire occurs, and thus the intumescent fire retardant coating layer 3 will not affect the opening and closing of the window cover 2. This makes it easy for operators to quickly open or close the window 14 to perform routine inspection and maintenance of the valve actuator 300 in the accommodating cavity.

[0057] The enclosure 1 also includes an extension 13, which has a first end 131 and a second end 132. The first end 131 is connected to the end of the reinforcing part 12 away from the main body 11, and the second end 132 extends away from the window 14. A receiving groove 15 is formed between the main body 11, the reinforcing part 12, and the extension 13. An intumescent fire-retardant coating layer 3 is disposed in the receiving groove 15. A first gap 213 is formed between the second end 132 and the first sidewall 212. The intumescent fire-retardant coating layer 3 has the following characteristics:

[0058] In the first state, there is a second gap 214 between the intumescent fire-retardant coating layer 3 and the first sidewall 212; in the second state, the end of the intumescent fire-retardant coating layer 3 away from the reinforcing part 12 is in contact with the first sidewall 212.

[0059] By placing the intumescent fire-retardant coating layer 3 inside the receiving groove 15, the receiving groove 15 can limit the intumescent fire-retardant coating layer 3, so that the intumescent fire-retardant coating layer 3 can expand upon contact with fire and abut against the first side wall 212 when a fire occurs, thereby filling the gap between the cover 1 and the window cover 2, improving the sealing performance of the cover 1 and the window cover 2 in the event of a fire, preventing the high temperature of the fire from being transmitted into the receiving cavity, and improving the reliability of the fireproof cover 100.

[0060] By using the first interval 213, interference between the extension 13 and the first side wall 212 can be avoided, which facilitates the opening and closing of the window cover 2. By using the second interval 214, interference between the intumescent fire-retardant coating layer 3 and the window cover 2 can be avoided before a fire occurs, which also facilitates the opening and closing of the window cover 2. Therefore, the first interval 213 and the second interval 214 make it easy for operators to quickly open or close the window 14 to perform routine inspection and maintenance of the valve actuator 300 in the accommodating cavity.

[0061] It is understandable that the intumescent fire-retardant coating layer 3 can change from the first state to the second state when exposed to fire. That is, the first state of the intumescent fire-retardant coating layer 3 refers to the initial state of the intumescent fire-retardant coating before it is exposed to fire, and the second state of the intumescent fire-retardant coating layer 3 refers to the expanded state of the intumescent fire-retardant coating layer 3 after it is exposed to fire.

[0062] From the first end 131 to the second end 132, the thickness of the intumescent fire-retardant coating layer 3 in the first state is a, and the length of the second interval 214 is b, satisfying: a≤b≤2a.

[0063] Before exposure to fire, intumescent fire-retardant coatings have a dense structure and good thermal conductivity. However, after exposure to fire, they foam and become fluffy, drastically reducing their thermal conductivity. For example, the thermal conductivity of intumescent fire-retardant coatings for steel structures before exposure to fire is λ1≥2W / m·K, while after foaming and expanding upon exposure to fire, the thermal conductivity is λ2≤0.05W / m·K. Therefore, using a≤b ensures that the intumescent fire-retardant coating layer 3 has sufficient expansion space, thus ensuring a low thermal conductivity in the second state. This improves the heat insulation performance at window 14 of the fireproof cover 100, thereby enhancing the fire resistance of the fireproof cover 100 at window 14. Since existing intumescent fire-retardant coatings expand to more than three times their own thickness upon exposure to fire, i.e., the thickness of the intumescent fire-retardant coating layer 3 in the second state is d, then d>5a. At the same time, the use of intumescent fire-retardant coating layer 3, which is in the second state, ensures that the second gap 214 is filled with b≤2a. This ensures that in the event of a fire, the intumescent fire-retardant coating layer 3 can completely fill the gap between the window cover 2 and the cover 1, preventing the possibility of high temperature fire entering the interior of the fireproof cover 100 through the gap of the window 14. This achieves the purpose of preventing high temperature fire from being transmitted to the accommodating cavity and improving the reliability of the fireproof cover 100.

[0064] Preferably, an intumescent fire-retardant coating layer 3 that expands to more than ten times its own thickness when exposed to fire can be selected. That is, if the thickness of the intumescent fire-retardant coating layer 3 in the second state is d, then d > 10a.

[0065] It is understood that the expansion thickness d of the intumescent fire-retardant coating layer mentioned in this invention refers to the thickness that the intumescent fire-retardant coating layer can reach after it expands freely without being restricted by external objects when it is exposed to fire. That is, the expansion thickness d is not the thickness of the intumescent fire-retardant coating layer after it expands when it is exposed to fire and is restricted by the first sidewall 212.

[0066] In this embodiment, the intumescent fire-retardant coating layer 3 is an intumescent fire-retardant coating layer for steel structures.

[0067] Preferably, 5mm ≤ a ≤ 10mm.

[0068] Because the intumescent fire-retardant coating layer 3 has a dense structure and good thermal conductivity before being exposed to fire, the intumescent fire-retardant coating layer 3 with a thickness of 5mm≤a≤10mm can not only fill the second gap 214 when a fire occurs, but also increase the heat insulation performance of the fireproof cover 100 near the window 14.

[0069] In this embodiment, a = 8 mm.

[0070] In other implementations, a can be any value that satisfies 5mm≤a≤10mm, such as a=5mm, a=6mm, a=7mm, a=9mm, a=10mm, etc.

[0071] The length of the second interval 214 in the direction from the first end 131 to the second end 132 is f, which satisfies 1mm≤f≤5mm.

[0072] The wall surface of the reinforcing part 12 located within the receiving groove 15 is the bottom surface of the receiving groove 15, and the intumescent fire-retardant coating layer 3 covers the bottom surface of the groove. By covering the bottom surface of the groove with the intumescent fire-retardant coating layer 3, the projection of the intumescent fire-retardant coating layer 3 in the direction from the first end 131 to the second end 132 has the maximum area, thereby further ensuring that the intumescent fire-retardant coating layer 3 can fill all the gaps between the window cover 2 and the cover 1 in the event of a fire, and further eliminating the possibility of high temperature fire entering the interior of the fireproof cover 100 through the gaps in the window 14.

[0073] Along the first direction X, the length of the reinforcing part 12 is L1, the thickness of the extension part 13 is H, and the length of the first sidewall 212 is L2, satisfying: 0.5L1 + 0.5H < L2 < L1 + H. By using L2 < L1 + H, a third gap 215 can be formed between the first sidewall 212 and the main body part 11. The third gap 215 can provide a clearance for the window cover 2 during the opening and closing movement of the window cover 2, so as to facilitate the opening and closing of the window cover 2. Simultaneously, by using 0.5L1+0.5H<L2, the length of the first sidewall 212 exceeds half the length of the reinforcing part 12. This ensures that the projection of the first sidewall 212 in the direction from the first end 131 to the second end 132 coincides with at least half the projection of the reinforcing part 12. This allows for a sufficiently large overlapping area between the cover 1 and the window cover 2 to allow the intumescent fire-retardant coating layer 3 to foam and expand during a fire. This results in the intumescent fire-retardant coating layer 3 having a low thermal conductivity in its second state, thereby improving the heat insulation performance at the window 14 of the fireproof cover 100. This enhances the fire resistance of the fireproof cover 100 at the window 14 and further eliminates the possibility of high-temperature fire entering the interior of the fireproof cover 100 through the gaps in the window 14, thus improving the reliability of the fireproof cover 100.

[0074] Preferably, 10mm≤L1≤20mm, 1mm≤H≤3mm.

[0075] The first heat insulation layer 4 includes a nano-aerogel felt layer 41 and an aluminum foil layer 42. The nano-aerogel felt layer 41 is multi-layered, and the multiple nano-aerogel felt layers 41 are stacked sequentially along the thickness direction of the first heat insulation layer 4. An aluminum foil layer 42 is provided between two adjacent nano-aerogel felt layers 41. Although the nano-aerogel felt layer 41 can give the first heat insulation layer 4 good heat insulation performance, hot air can still flow through the gaps in the nano-aerogel felt layer 41 because it has a cotton-like loose structure. The present invention, by dividing the nano-aerogel felt layer 41 into multiple layers and providing an aluminum foil layer 42 between two adjacent nano-aerogel felt layers 41, can isolate the flow of hot air, thereby further improving the heat insulation performance of the first heat insulation layer 4.

[0076] In this embodiment, the number of nano-aerogel felt layers 41 is three, and the number of aluminum foil layers 42 is two.

[0077] In some other embodiments, the number of nano-aerogel felt layers 41 is any number, such as two, four, or five; preferably, the number of nano-aerogel felt layers 41 is greater than or equal to three.

[0078] The thickness of the nano-aerogel felt layer 41 is W1, and the thickness of the aluminum foil layer 42 is W2, satisfying the following conditions: 4mm≤W1≤50mm; 0.08mm≤W2≤0.2mm.

[0079] In this embodiment, the thickness of the nano-aerogel felt layer 41 is W1 = 20 mm and W2 = 0.1 mm.

[0080] In other embodiments, W1 can be any value satisfying 4mm≤W1≤50mm, such as W1=4mm, W1=5mm, W1=6mm, W1=7mm, W1=8mm, W1=9mm, W1=10mm, W1=16mm, W1=30mm, W1=40mm, W1=50mm, etc., and is not limited here.

[0081] In other embodiments, W2 can be any value that satisfies 0.08mm≤W2≤0.2mm, such as W2=0.08mm, W2=0.1mm, W2=0.12mm, W2=0.15mm, W2=0.18mm, W2=0.2mm, etc., and is not limited here.

[0082] The main body 11 includes a housing 111 and a base plate 112. One end of the housing 111 is open to form an opening, and the base plate 112 covers the opening and is connected to the housing 111 to form a receiving cavity 16. A first heat insulation layer 4 is connected to the inner wall of the housing 111, and a first heat insulation layer 4 is also connected to the inner wall of the base plate 112. By using the housing 111 and the base plate 112 to form the receiving cavity 16, it is convenient to install the fireproof cover 100 onto the equipment and to house the mechanisms on the equipment that need protection within the receiving cavity.

[0083] See Figures 7-10 The present invention also provides a fireproof device for protecting a valve actuator 300. The valve actuator 300 includes an electric actuator 301 and a drive shaft 302. One end of the drive shaft 302 is connected to the electric actuator 301 and the other end is connected to the valve 400. The fireproof cover includes any of the above-mentioned components and also includes a fireproof sleeve 200. The accommodating cavity is used to accommodate the electric actuator 301. The cover 1 has a first through hole 1121 communicating with the accommodating cavity. The first through hole 1121 is used for the drive shaft 302 to pass through. The fireproof sleeve 200 is sleeved on the drive shaft 302. In the event of a fire, the fireproof cover 100 prevents external smoke and heat from entering the accommodating cavity 16, thus providing fire protection for the electric actuator 301 and keeping its temperature below its own safe temperature. The fireproof sleeve 200 provides fire protection for the drive shaft 302 in the event of a fire, preventing the high temperature of the fire from being conducted to the electric actuator 301 through the drive shaft 302. This further ensures that the temperature of the electric actuator 301 remains below its own safe temperature, thereby ensuring that the electric actuator can operate normally even in the event of a fire.

[0084] The base plate 112 is also provided with a second through hole 1122 that communicates with the accommodating cavity. The second through hole 1122 is used for the cable to pass through.

[0085] In this embodiment, both the first through hole 1121 and the second through hole 1122 are formed on the base plate 112. After the electric actuator 301 is housed in the receiving cavity 16, fireproof putty can be applied to the base plate 112 to seal the first through hole 1121 and the second through hole 1122, thereby preventing high-temperature smoke and heat from entering the receiving cavity 16 through the first through hole 1121 and the second through hole 1122, thus protecting the electric actuator 301.

[0086] Valve 400 is installed on pipe 500.

[0087] The fire protection device also includes a bracket 600, with the pipe 500 and the base plate 112 connected to its two ends respectively. The bracket 600 allows the fireproof cover 100 to adapt to different installation environments. For example, when the valve actuator 300 is not capable of supporting the weight of the fireproof cover 100, the bracket 600 can be used to support the fireproof cover 100.

[0088] The valve actuator 300 also includes a handwheel 303, an instrument 304, and a flange 305. The handwheel 303 is connected to the electric actuator 301, the instrument 304 is connected to the electric actuator 301, and the flange 305 is sleeved on the drive shaft 302.

[0089] In this embodiment, the position of the first window 14 is opposite to the position of the handwheel 303. The operator can open the window 14 through the window cover 2 to complete the daily inspection and maintenance of the handwheel 303 and the emergency operation in case of emergency.

[0090] The fireproof sleeve 200 includes a cylinder 201 and a second heat insulation layer 202. The cylinder 201 has a channel 203 that extends axially through the cylinder 201 and allows the drive shaft 302 to pass through. The second heat insulation layer 202 is connected to the inner wall of the channel 203 and is used to wrap the drive shaft 302.

[0091] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A fireproof cover, characterized in that, include: The cover includes a main body and a reinforcing part. The main body has an accommodating cavity, and the reinforcing part is connected to the outer wall of the main body. The cover has a window that passes through the reinforcing part and the main body in sequence along a first direction. A window cover, one end of which is movably connected to the cover and can be opened or closed; An intumescent fire-retardant coating layer is attached to the side wall of the reinforcing part away from the window and is located between the reinforcing part and the window cover; The first heat insulation layer is connected to both the inner wall of the main body and the inner wall of the window cover; The end of the window cover facing the window is recessed in a direction away from the window. The groove has a first bottom wall and a first side wall connected to the first bottom wall. Along the first direction, the projection of the first bottom wall at least covers the window. The intumescent fireproof coating layer is disposed between the reinforcing part and the first side wall. The cover also includes an extension having a first end and a second end opposite to each other. The first end is connected to the end of the reinforcing part away from the main body, and the second end extends away from the window. A receiving groove is formed between the main body, the reinforcing part and the extension. The intumescent fireproof coating layer is disposed in the receiving groove. A first gap is formed between the second end and the first sidewall. The intumescent fire-retardant coating layer has the following characteristics: In the first state, there is a second gap between the intumescent fire-retardant coating layer and the first sidewall; In the second state, the end of the intumescent fire-retardant coating layer away from the reinforcing part contacts the first sidewall.

2. The fireproof cover according to claim 1, characterized in that, From the first end to the second end, the thickness of the intumescent fire-retardant coating layer in the first state is a, and the length of the second interval is b, satisfying: a≤b≤2a.

3. The fireproof cover according to claim 1, characterized in that, The wall surface of the reinforcing part located inside the receiving groove is the bottom surface of the receiving groove, and the intumescent fireproof coating layer covers the bottom surface of the groove.

4. The fireproof cover according to claim 1, characterized in that, Along the first direction, the length of the reinforcing part is L1, the thickness of the extension part is H, and the length of the first sidewall is L2, satisfying: 0.5L1+0.5H<L2<L1+H.

5. The fireproof cover according to claim 1, characterized in that, The first heat insulation layer includes a nano-aerogel felt layer and an aluminum foil layer. The number of nano-aerogel felt layers is multiple, and the multiple nano-aerogel felt layers are stacked sequentially along the thickness direction of the first heat insulation layer. The aluminum foil layer is provided between two adjacent nano-aerogel felt layers.

6. The fireproof cover according to claim 5, characterized in that, The thickness of the nano-aerogel felt layer is W1, and the thickness of the aluminum foil layer is W2, satisfying the following conditions: 4mm≤W1≤50mm; 0.08mm≤W2≤0.2mm.

7. The fireproof cover according to any one of claims 1-6, characterized in that, The main body includes a shell and a bottom plate. One end of the shell is open to form an opening. The bottom plate covers the opening and is connected to the shell to form the accommodating cavity. The inner wall of the shell is connected to the first heat insulation layer, and the inner wall of the bottom plate is connected to the first heat insulation layer.

8. A fireproof device for protecting a valve actuator, the valve actuator comprising an electric actuator and a drive shaft, one end of the drive shaft being connected to the electric actuator and the other end being connected to a valve, characterized in that, The fireproof cover according to any one of claims 1-7 further includes a fireproof sleeve; the accommodating cavity is used to accommodate the electric actuator, the cover body has a first through hole communicating with the accommodating cavity, the first through hole is used for the transmission shaft to pass through; the fireproof sleeve is sleeved on the transmission shaft.

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