A steel plate roof inspection opening sealing system and installation method thereof

Abstract

The present invention discloses a steel plate roof inspection opening sealing system and an installation method thereof, wherein the system comprises an inspection opening body and an inspection opening cover plate, wherein the inspection opening cover plate can be fixed on the top of the inspection opening body in an openable and closable manner, wherein the steel bottom plate edge plate on the inspection opening body is located inside the circumferential structure surrounded by the vertical column keels of the inspection opening keel, and the steel plate sealing plate is located outside the above-mentioned circumferential structure, and the first insulation layer is filled in the vertical space of the inspection opening keel; the aluminum alloy opening fan profile on the inspection opening cover plate is located below the aluminum single plate, and its periphery is fixedly connected to the heat-insulating rubber belt, the aluminum alloy opening frame profile is fixed above the top cross-bracing keel, and the two ends of the hinge opening are fixedly connected to the aluminum alloy opening fan profile and the aluminum alloy opening frame profile respectively, and the second insulation layer is arranged in the gap formed by the two aluminum single plates arranged above and below. The present invention strengthens the weak parts of the inspection opening to ensure its airtightness and waterproofness, and on the other hand, reduces the energy loss of the building system and reduces the later operation and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of building facilities, and in particular to a steel plate roof inspection opening sealing system and an installation method thereof. Background Art

[0002] To ensure adequate wind resistance, public buildings now increasingly use steel as the primary material for their metal roof panels. Compared to the previously common aluminum-magnesium-manganese roof panels, steel roofs offer superior wind resistance. Public building roofs often incorporate various functional systems: snow protection systems, roof fall protection systems, roof gutter heating systems, photovoltaic panels, and more. These systems are frequently used throughout the building's lifespan, subjecting them to varying degrees of damage. When these systems become damaged, maintenance personnel must access the roof for repairs. This requires openings (commonly known as access hatches) in the roof. Access to the roof through these hatches is accomplished by climbing ladders from within the building. Holes in metal roofs can create risks such as water and air leaks, localized insulation loss, and cold bridges. Therefore, ensuring the airtightness of these access hatches is crucial.

[0003] Currently, aluminum-magnesium-manganese roofs are quite popular, and there is a set of formed aluminum-magnesium-manganese roof inspection opening system, but this system is not suitable for steel plate roofs. The edges and roof panels of the aluminum-magnesium-manganese roof inspection opening system are connected together by welding to achieve the effect of sealing and waterproofing. However, the nature of the material of steel plate roofs determines that the previous welding system cannot be applied to steel plate roof panels, because the thickness of steel plate roof panels is generally about 0.8mm. If the steel plate roof is welded, it will cause the steel plate to deform at the welding point, affecting the roof effect, and even weld the steel plate through, causing water leakage hazards. Therefore, steel plate roofs require another form of roof inspection opening system to ensure the airtightness, waterproofness and thermal insulation continuity of its openings. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a steel plate roof inspection port sealing system and an installation method thereof, which strengthens the sealing treatment in multiple key processes of the inspection port, and "integrates" the steel plate roof panel and the inspection port system well together, achieving the required effects and functions of the roof inspection port, ensuring the airtightness at the inspection port, preventing water leakage at the roof inspection port, and maintaining the continuity of the roof insulation layer there.

[0005] The present invention adopts the following technical solutions:

[0006] A steel plate roof inspection opening sealing system, comprising an inspection opening body and an inspection opening cover plate, wherein the inspection opening body is sealed and fixed to the main roof structure, the inspection opening cover plate can be fixed above the inspection opening body in an openable and closable manner, and an opening handle is provided at the lower end of the inspection opening cover plate; the inspection opening body comprises an inspection opening keel, a steel bottom plate edge plate, a steel plate sealing plate and a first thermal insulation layer, the steel bottom plate edge plate is located on the inner side of a circumferential structure surrounded by vertical column keels of the inspection opening keel, the steel plate sealing plate is located on the outer side of the circumferential structure surrounded by the vertical column keels, and the first thermal insulation layer is filled in the vertical space formed by the vertical column keels of the inspection opening keel, the steel bottom plate edge plate and the steel plate sealing plate;

[0007] The inspection port cover includes two aluminum panels, an aluminum alloy opening fan profile, an aluminum alloy opening frame profile, an insulating rubber belt, a second insulation layer and a hinge. The insulating rubber belt is arranged below the edge of the inspection port cover. The aluminum alloy opening fan profile is located below the aluminum panel, and its periphery is fixedly connected to the insulating rubber belt. The aluminum alloy opening frame profile is located below the aluminum alloy opening fan profile and fixed above the top cross-bracing keel of the inspection port keel. The hinge is located at one end of the aluminum alloy opening fan profile, and the two ends of the hinge opening are respectively fixedly connected to the aluminum alloy opening fan profile and the aluminum alloy opening frame profile. The second insulation layer is arranged in the gap formed by the two upper and lower aluminum panels, and the two ends of the two aluminum panels are fixedly connected by the aluminum alloy opening fan profile and fasteners.

[0008] The inspection opening keel is made of steel square tubes, including circumferentially arranged bottom cross-bracing keels, vertical column keels and circumferentially arranged top cross-bracing keels. The bottom cross-bracing keels form a "well" grid structure, and both ends of each bottom cross-bracing keel are fixed in the main roof structure; the vertical column keels are square and fixedly arranged above the bottom cross-bracing keels, and the top cross-bracing keels are fixed above the vertical column keels.

[0009] The top elevations of the plurality of vertical column keels are consistent, and the heights of the vertical column keels are such that the roof flashing height at the water-facing surface of the system is greater than or equal to 250 mm.

[0010] The steel base plate edge plate is an "L"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel and its top bent outward and fixed to the side of the top cross-bracing keel; the steel plate sealing plate is a "Z"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel and its top fixed to the bottom of the roof base plate of the main roof structure.

[0011] A TPO waterproof layer is provided on the upper edge of the main roof structure. The TPO waterproof layer is turned up along the inspection port keel near the inspection port body to the side wall of the top cross-bracing keel and is fixed and sealed with the side wall of the top cross-bracing keel.

[0012] The TPO waterproof layer consists of two layers, namely a roof-turned TPO layer and an additional TPO layer. The roof-turned TPO layer is turned up along the inspection port keel to the side wall of the top cross-bracing keel near the inspection port body. The additional TPO layer is arranged on the outside of the roof-turned TPO layer. The additional TPO layer is turned up along the inspection port keel to the top of the roof-turned TPO layer and is tightly sealed against the side wall of the top cross-bracing keel to ensure that the additional TPO layer completely covers the roof-turned TPO layer.

[0013] A composite angle steel brace for supporting the steel plate roof panel is provided on the outer wall of the inspection port body above the main roof structure, and the composite angle steel brace is arranged along the circumference of the inspection port body; a first steel plate edge plate is fixed between the composite angle steel brace and the steel plate roof panel, and sealant is used to seal the overlapping ends of the steel plate roof panel and the first steel plate edge plate, and one end of the first steel plate edge plate away from the steel plate roof panel is turned upward along the outer wall of the inspection port body below the top cross brace keel; a second steel plate edge plate is fixed on the side of the top cross brace keel, and the lower end of the second steel plate edge plate is connected to the upper end of the first steel plate edge plate in a mutually interlocking state.

[0014] The composite angle steel supports at both ends of the inspection port body along the water flow direction are respectively provided with eaves inner sealing plates, the eaves inner sealing plates are fixed to the ribs of the steel roof panel, and the connection between the steel roof panel and the eaves inner sealing plates is sealed with sealant.

[0015] The first steel plate edge plate is fixed between the composite angle steel support and the eaves inner sealing plate. One end of the first steel plate edge plate is turned upward along the outer wall of the inspection port body to form a water guide groove between the inspection port body and the eaves inner sealing plate.

[0016] The outer side of the first steel plate trimming plate is provided with a waterproof coating, which is a double-layer structure and extends all around to the ribs of the steel plate roof panel. It is flipped up and fixed to the upper side of the first steel plate trimming plate at the facade of the inspection port body.

[0017] A method for installing a steel plate roof inspection opening sealing system comprises the following steps:

[0018] S1. Installation of the inspection port:

[0019] S1-1. Install bottom horizontal bracing keels at the inspection opening, rooted on the main roof structure to form a "well" grid; install vertical column keels on top of the bottom horizontal bracing keels. The vertical column keels are arranged in a square shape with an inner clearance of 800mm-1200mm, and a circle of top horizontal bracing keels is placed on top of the vertical column keels;

[0020] S1-2. Install L30*3mm composite angle steel supports on the outside of the vertical column keel to support the steel roof panel. The composite angle steel supports are arranged along the circumference of the inspection port body.

[0021] S1-3. Install the steel bottom plate trimming plate on the inside of the vertical column keel. The steel bottom plate trimming plate is L-shaped, with the upper end fixed to the side of the top cross-bracing keel and the lower end fixed to the side of the bottom cross-bracing keel with self-tapping screws. Fix the lower side of the steel plate closure plate on the outside of the vertical column keel to the side of the bottom cross-bracing keel and the upper side to the bottom of the roof base plate with rivets.

[0022] S1-4. Fill the vertical space formed by the vertical column keel, steel bottom plate edge plate and steel plate cover with the first insulation layer, and lay the double insulation layer with staggered joints;

[0023] S2. TPO waterproof layer installation:

[0024] Fold the roof TPO layer up along the inspection port keel near the inspection port body to the side wall of the top cross-bracing keel, and fix and seal it with the side wall of the top cross-bracing keel. Then make an additional TPO layer, completely cover the roof TPO layer on its lower inner side, and place the additional TPO layer close to the side of the inspection port keel, and seal it with silicone weather-resistant sealant.

[0025] S3. Installation of steel plate edge trim:

[0026] Place the first steel plate edge trimming plate on top of the composite angle steel support, fix the first steel plate edge trimming plate to the full-length angle steel by rivets, and locate it below the steel plate roof panel. Cut the steel plate roof panel to the corresponding flow width. Connect the edge of the steel plate roof panel and the first steel plate edge trimming plate by rivets. The longitudinal spacing of the rivets is 100mm. Apply two layers of silicone weatherproof sealant between the steel plate roof panel and the first steel plate edge trimming plate. The two layers of sealant are respectively located at the two overlapping ends of the plates. After the rivets are fixed on the edge trimming plate, seal the nail heads with glue. Then fix the second steel plate edge trimming plate on the side of the horizontal bracing keel at the top of the inspection port. The second steel plate edge trimming plate and the first steel plate edge trimming plate are in a mutually interlocking state.

[0027] S4. Waterproof coating installation:

[0028] Two layers of waterproof coating are applied on the outside of the first steel plate edge plate, which are extended to the ribs of the steel plate roof panel and turned up and fixed to the upper side of the first steel plate edge plate at the facade of the inspection opening body;

[0029] S5. Installation of inspection cover:

[0030] First, fix the aluminum alloy opening frame profile above the top cross-bracing keel, place the aluminum alloy opening fan profile above the aluminum alloy opening frame profile, and install a hinge at one end so that the two ends of the hinge opening are fixedly connected to the aluminum alloy opening frame profile and the aluminum alloy opening fan profile respectively. Then install the upper and lower aluminum panels, connect the upper and lower aluminum panels with the aluminum alloy opening fan profile and fasteners, seal them with insulating rubber belts on all sides, form a 100mm cavity in the middle, fill it with the second insulation layer of rock wool, and form a finished inspection port cover. Finally, fix the inspection port cover in an openable and closable manner above the inspection port body, and provide an opening handle at the lower end of the inspection port cover, and install an electric push rod.

[0031] The technical solution of the present invention has the following advantages:

[0032] A. The weather-resistant sealant between the steel roof panel and the steel trimming plate and the waterproof coating above the trimming plate of the present invention solve the previous sealing problem between two materials of the same material, and the construction process of the waterproof coating is much simpler than the previous aluminum-magnesium-manganese welding construction process, which can not only ensure the airtightness and waterproofness between the two plates, but also simplify the construction process. In addition, the inspection port cover adopts a thermally insulated aluminum profile to solve the cold bridge problem at the cover plate of previous projects, reduce the hidden danger of water leakage, and the setting of the electric push rod is conducive to the opening and closing of the cover plate. The formed steel roof panel has plate ribs, and the inner sealing plate of the eaves is fixed to the inner side of the rib of the steel roof panel by sealant and rivets. The two are well combined, and the outer area of ​​the roof panel is reinforced with a waterproof coating (two coatings and one cloth) to ensure the sealing effect here.

[0033] B. This invention effectively integrates the steel roof panel with the access opening system by enhancing sealing at multiple key steps in the access opening process. This achieves the desired function and functionality of the roof access opening, ensuring airtightness at the access opening, preventing water leakage, and maintaining the continuity of the roof insulation layer. Furthermore, the above steps are relatively simple to construct, facilitating construction. When all of the above functions are achieved, energy consumption for the entire roof, and even the building, can be reduced, significantly reducing building operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1A top view of the steel plate roof inspection opening sealing system of the present invention;

[0036] Figure 2 This is a transverse cross-sectional view of the roof inspection opening sealing system of the present invention;

[0037] Figure 3 This is a longitudinal cross-sectional view of the roof inspection opening sealing system of the present invention;

[0038] Figure 4 This is a diagram showing the connection between the roof steel plate edge plate and the steel plate roof panel in the present invention;

[0039] Figure 5 This is a partial large-scale drawing (transverse section) of the steel plate roof around the inspection opening in the present invention;

[0040] Figure 6 This is a partial large-scale drawing (longitudinal section) of the steel plate roof around the inspection opening in the present invention;

[0041] Figure 7 This is a schematic diagram of the inner sealing plate structure of the eaves in the present invention.

[0042] The following are marked in the figure:

[0043] 1- Inspection port body, 11- Inspection port keel, 111- Bottom cross bracing keel, 112- Vertical column keel, 113- Top cross bracing keel, 12- Steel bottom plate edge plate, 13- Steel plate cover plate, 14- First insulation layer;

[0044] 2-inspection cover, 21-aluminum veneer, 22-aluminum alloy opening fan profile, 23-aluminum alloy opening frame profile, 24-insulating rubber belt, 25-second insulation layer, 26-hinge;

[0045] 3-Open the handle;

[0046] 4-TPO waterproof layer, 41-roof TPO layer, 42-additional TPO layer;

[0047] 5-Compound angle steel support; 6-First steel plate edge plate; 7-Second steel plate edge plate; 8-Eaves inner sealing plate; 9-Water guide gutter; 10-Waterproof coating; 20-Steel plate roof panel; 30-Roof base plate; 40-Stainless steel rivets; 50-Self-tapping screws; 60-Weatherproof sealant; 70-Electric push rod. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] like Figure 1-Figure 2As shown, the present invention provides a steel plate roof inspection port sealing system, including an inspection port body 1 and an inspection port cover plate 2. The inspection port body 1 is sealed and fixed on the main structure of the roof. The inspection port cover plate 2 can be opened and closed and fixed above the inspection port body 1, and an opening handle 3 is provided at the lower end of the inspection port cover plate 2. The inspection port body 1 includes an inspection port keel 11, a steel bottom plate edge plate 12, a steel plate sealing plate 13 and a first thermal insulation layer 14. The steel bottom plate edge plate 12 is located on the inner side of the circumferential structure surrounded by the vertical column keels 112 of the inspection port keel 11, and the steel plate sealing plate 13 is located on the outer side of the circumferential structure surrounded by the vertical column keels 112. The first thermal insulation layer 14 fills the vertical space formed by the vertical column keels 112 of the inspection port keel 11, the steel bottom plate edge plate 12 and the steel plate sealing plate 13. The inspection port cover 2 includes two aluminum panels 21, an aluminum alloy opening fan profile 22, an aluminum alloy opening frame profile 23, an insulating rubber belt 24, a second insulation layer 25 and a hinge 26. The insulating rubber belt 24 is arranged below the edge of the inspection port cover 2. The aluminum alloy opening fan profile 22 is located below the aluminum panel 21, and its periphery is fixedly connected to the insulating rubber belt 24. The aluminum alloy opening frame profile 23 is located below the aluminum alloy opening fan profile 22 and is fixed above the top cross-bracing keel 113 of the inspection port keel 11 to support the upper inspection port cover 2. The hinge 26 is located at one end of the aluminum alloy opening fan profile 22. The two open ends of the hinge 26 are respectively fixedly connected to the aluminum alloy opening fan profile 22 and the aluminum alloy opening frame profile 23 to realize the opening and closing function of the inspection port cover 2. The second insulation layer 25 is arranged in the gap formed by the two upper and lower aluminum panels 21, and the two ends of the two aluminum panels 21 are fixedly connected by the aluminum alloy opening fan profile 22 and fasteners.

[0052] Furthermore, the inspection opening keel 11 is made of steel square tubes, including a circumferentially arranged bottom cross-bracing keel 111, a vertical column keel 112, and a circumferentially arranged top cross-bracing keel 113. The bottom cross-bracing keel 111 forms a "well" grid structure, and both ends of each bottom cross-bracing keel 111 are fixed in the main roof structure; the vertical column keels 112 are fixedly arranged in a square above the bottom cross-bracing keel 111, and the top cross-bracing keel 113 is fixed above the vertical column keel 112. The top elevations of the four vertical column keels 112 are consistent, and the height of the vertical column keels 112 ensures that the roof flashing height at the water-facing surface of the system is greater than or equal to 250 mm. The steel bottom plate edge plate 12 is an "L"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel 111 and its top bent outward and fixed to the side of the top cross-bracing keel 113. The steel plate sealing plate 13 is a "Z"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel 111 and its top fixed to the bottom of the roof bottom plate 30 of the roof main structure.

[0053] A TPO waterproof layer 4 is provided on the upper edge of the main roof structure. The TPO waterproof layer 4 consists of two layers, namely a roof-upturned TPO layer 41 and an additional TPO layer 42. The roof-upturned TPO layer 41 is turned up along the inspection port keel 11 to the side wall of the top cross-bracing keel 113 near the inspection port body 1. The additional TPO layer 42 is arranged on the outside of the roof-upturned TPO layer 41. The additional TPO layer 42 is turned up along the inspection port keel 11 to above the roof-upturned TPO layer 41 and is tightly sealed against the side wall of the top cross-bracing keel 113 to ensure that the additional TPO layer 42 completely covers the roof-upturned TPO layer 41.

[0054] like Figure 2-Figure 4 As shown, a composite steel angle brace 5 for supporting the steel roof panel 20 is provided on the outer wall of the inspection port body 1 located above the main roof structure. The composite steel angle brace 5 is an L30*3mm angle steel and is arranged circumferentially along the inspection port body 1. A first steel trimming plate 6 is fixed between the composite steel angle brace 5 and the steel roof panel 20, and a sealant is used to seal the overlapping ends of the steel roof panel 20 and the first steel trimming plate 6. One end of the first steel trimming plate 6, which is away from the steel roof panel 20, is located below the top cross brace 113 that is turned upward along the outer wall of the inspection port body 1. A second steel trimming plate 7 is fixed to the side of the top cross brace 113, and the lower end of the second steel trimming plate 7 is connected to the upper end of the first steel trimming plate 6 in a mutually interlocking state.

[0055] like Figure 5-Figure 7 As shown, the composite angle steel supports 5 at both ends of the inspection port body 1 along the water flow direction are respectively provided with eaves inner sealing plates 8, which are fixed to the ribs of the steel roof panel 20, and the connection between the steel roof panel 20 and the eaves inner sealing plates 8 is sealed with sealant.

[0056] In addition, a first steel plate trimming panel 6 is fixed between the composite angle steel support 5 and the eaves inner sealing plate 8. One end of the first steel plate trimming panel 6 is turned upward along the outer wall of the inspection port body 1, forming a water guide trough 9 between the inspection port body 1 and the eaves inner sealing plate 8. The outer side of the first steel plate trimming panel 6 is provided with a waterproof coating 10. The waterproof coating 10 has a double-layer structure and extends all around to the ribs of the steel plate roof panel 20. The waterproof coating 10 is turned upward and fixed to the upper side of the first steel plate trimming panel 6 at the vertical surface of the inspection port body 1.

[0057] The present invention also provides a method for installing a steel plate roof inspection opening sealing system, comprising the following steps:

[0058] S1. Installation of the inspection port:

[0059] S1-1. The installation of the inspection port keel 11 is installed together with the roof purlin. The roof C-shaped purlin is disconnected at the inspection port. The inspection port keel 11 adopts steel square tube. First, install the bottom cross bracing keel 111 at the inspection port, root it on the main roof structure, and spot weld it on the side of the main roof structure according to the point positioning to form a "well" grid. After confirmation, the keel is fully welded; install the vertical column keel 112 on the upper part of the bottom cross bracing keel 111. The vertical column keel 112 is arranged in a square shape, and the inner clearance is 800mm-12 00mm, to ensure that people can pass through this inspection port normally; according to relevant specifications, the roof flashing height at the water-facing side needs to be greater than or equal to 250mm, so the height of the column is reversely deduced from the flashing height of the roof inspection port; the surface of the inspection port column needs to be level with the ground (not perpendicular to the curvature of the roof) to ensure that the angle of people after coming out of the inspection port is in a normal walking state; then make a circle of top cross-bracing keel 113 on the top of the vertical column keel 112, and after confirming that it is correct, perform full welding, grinding, painting and other works on the keel.

[0060] S1-2. Install an L30*3mm composite angle steel support 5 on the outside of the vertical column keel 112 to support the steel roof panel 20. The purpose is to support the steel roof panel 20 and the first steel plate edge plate 6. A section of angle steel of the same length is cantilevered on both sides of the vertical column keel 112, and then a full-length angle steel is welded to the side of the end of the cantilevered angle steel to ensure sufficient support for the first steel plate edge plate 6 above this point.

[0061] S1-3. Install the steel bottom plate edge plate 12 on the inner side of the vertical column keel 112. The steel bottom plate edge plate 12 is "L"-shaped, with the upper end fixed to the side of the top cross-bracing keel 113, and the lower end fixed to the side of the bottom cross-bracing keel 111 through self-tapping screws 50; fix the lower side of the steel plate sealing plate 13 on the outer side of the vertical column keel 112 to the side of the bottom cross-bracing keel 111, and fix the upper side to the bottom of the roof bottom plate 30 through rivets, so as to support the first insulation layer 14.

[0062] S1-4. Fill the vertical space formed by the vertical column keel 112, the steel bottom plate edge plate 12 and the steel plate sealing plate 13 with the first insulation layer 14 of rock wool. The double-layer insulation rock wool is laid with staggered joints. When laying, it is required to completely cover and fit tightly. There should be no gaps between the cotton wool and there should be no gaps at the interface of two adjacent cotton boards to prevent the occurrence of cold bridges.

[0063] S2. TPO waterproof layer installation:

[0064] The roof-turned TPO layer 41 is turned up along the inspection port keel 11 to the side wall of the top cross-bracing keel 113 near the inspection port body 1, and is fixed and sealed with the side wall of the top cross-bracing keel 113. Then, an additional TPO layer 42 is made, and the roof-turned TPO layer 41 is covered underneath. The two layers of TPO are connected by hot air welding. The welding joint is located near the corner of the plane-turned position. The upper part of the additional TPO layer 42 exceeds the roof-turned TPO layer 41, ensuring that the additional TPO layer 42 completely covers the roof-turned TPO layer 41. Then, the upper part of the additional TPO layer 42 is pressed against one side of the inspection port keel 11 and sealed with silicone weather-resistant sealant 60 to enhance the waterproof effect of the roof inspection port. By means of additional waterproof layers and sealants, the waterproof continuity of the roof opening is ensured, as well as the sealing effect at this node.

[0065] S3. Installation of steel plate edge trim:

[0066] Place the first steel plate edge trimming plate 6 above the composite angle steel support 5, fix the first steel plate edge trimming plate 6 on the full-length angle steel by rivets, and locate it below the steel plate roof panel 20, cut the steel plate roof panel 20 to the corresponding water flow width, connect the edge of the steel plate roof panel 20 and the first steel plate edge trimming plate 6 by rivets, and the longitudinal spacing of the rivets is 100mm. Apply two layers of silicone weatherproof sealant 60 between the steel plate roof panel 20 and the first steel plate edge trimming plate 6, and the two layers of sealant are respectively located at the two overlapping ends of the plates, and after the edge trimming plate is fixed with rivets, apply glue and seal at the nail head position to ensure a real waterproof seal; then fix the second steel plate edge trimming plate 7 on the side of the horizontal bracing keel 113 at the top of the inspection port, and the second steel plate edge trimming plate 7 and the first steel plate edge trimming plate 6 are in a mutually interlocking state to prevent water from splashing and avoid water leakage here.

[0067] S4. Waterproof coating installation:

[0068] After the steel plate trim is installed, it is sealed with Kaide waterproof paint. Two layers of Kaide waterproof paint, namely waterproof coating 10, are applied on the outside of the first steel plate trim 6. The specific process of Kaide waterproof paint is - two coatings and one cloth flexible waterproofing: the first layer [bottom layer]: BESS base layer paint (bonding layer, not included in the number of process layers); the second layer [middle layer]: woven polyester cloth (reinforcement layer); the third layer [middle layer]: BESS base layer paint (wetting layer); the fourth layer [surface layer]: Top surface paint (insulation layer). This system is called BESS waterproof system. It has excellent adhesion and weather resistance of various materials, and is extremely environmentally friendly. No fire source is required during construction, which is clean and safe. The product fire protection level reaches Class A. Kaide waterproof paint extends all around to the steel plate roof panel 20 plate ribs, and is flipped up and fixed to the upper side of the first steel plate trim 6 at the vertical surface of the inspection port body 1 to ensure waterproof continuity.

[0069] S5. Installation of inspection cover:

[0070] First, fix the aluminum alloy opening frame profile 23 above the top cross bracing keel 113, place the aluminum alloy opening fan profile 22 above the aluminum alloy opening frame profile 23, and install a hinge 26 at one end thereof, so that the two ends of the hinge 26 are fixedly connected to the aluminum alloy opening frame profile 23 and the aluminum alloy opening fan profile 22 respectively, and then install the upper and lower aluminum veneers 21, connect the upper and lower aluminum veneers 21 through the aluminum alloy opening fan profile 22 and fasteners, and pass the heat insulation rubber belt 2 around them. 4 is sealed, forming a 100mm cavity in the middle, which is filled with the second insulation layer 25 of rock wool to maintain the continuity of the roof insulation, forming the finished inspection port cover 2. Finally, the inspection port cover 2 is fixed on the top of the inspection port body 1 in an openable and closable manner, and an opening handle 3 is provided at the lower end of the inspection port cover 2. An electric push rod 70 is installed to ensure normal opening and closing. When the inspection port cover 2 is covered with heavy objects such as snow, it is difficult to open it manually. The use of the electric push rod 70 can ensure that the inspection port cover 2 can be opened smoothly. When the inspection port cover 2 is closed, the profiles are sealed with an insulating rubber strip 24 to ensure airtightness. In addition, the inspection port cover 2 uses a thermally insulated aluminum profile to prevent the occurrence of cold bridges.

[0071] The present invention uses weather-resistant sealant between the steel roof panel and the steel trimming plate and waterproof coating above the trimming plate, which solves the previous sealing problem between two materials of the same material. Moreover, the construction process of the waterproof coating is much simpler than the previous aluminum-magnesium-manganese welding construction process. It can not only ensure the airtightness and waterproofness between the two plates, but also simplify the construction process. In addition, the inspection port cover adopts a thermally broken aluminum profile, which solves the cold bridge problem at the cover plate of previous projects and reduces the potential for water leakage. The setting of the electric push rod is conducive to the opening and closing of the cover plate. The formed steel roof panel has plate ribs, and the inner sealing plate of the eaves is fixed to the inner side of the rib of the steel roof panel by sealant and rivets. The two are well combined, and the outer area of ​​the roof panel is reinforced with a waterproof coating (two coatings and one cloth) to ensure the sealing effect here.

[0072] The present invention effectively integrates the steel roof panel with the access opening system by enhancing sealing performance at multiple key steps of the access opening, achieving the desired function and functionality of the roof access opening. This ensures airtightness at the access opening, prevents water leakage, and maintains the continuity of the roof insulation layer. Furthermore, the above steps are relatively simple to construct, facilitating construction. When all of the above functions are met, energy consumption for the entire roof, and even the building, can be reduced, reducing the cost of building operation and maintenance to a certain extent.

[0073] Any matters not described in the present invention are applicable to the prior art.

[0074] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A steel plate roof inspection opening sealing system, comprising an inspection opening body (1) and an inspection opening cover plate (2), wherein the inspection opening body (1) is sealed and fixed on the main structure of the roof, and the inspection opening cover plate (2) is fixed above the inspection opening body (1) in an openable and closable manner, and an opening handle (3) is provided at the lower end of the inspection opening cover plate (2), characterized in that: The inspection port body (1) includes an inspection port keel (11), a steel bottom plate edge plate (12), a steel plate sealing plate (13) and a first thermal insulation layer (14), wherein the steel bottom plate edge plate (12) is located on the inner side of a circumferential structure surrounded by the vertical column keels (112) of the inspection port keel (11), and the steel plate sealing plate (13) is located on the outer side of the circumferential structure surrounded by the vertical column keels (112), and the first thermal insulation layer (14) is filled in a vertical space formed by the vertical column keels (112) of the inspection port keel (11), the steel bottom plate edge plate (12) and the steel plate sealing plate (13); The inspection port cover (2) comprises two aluminum veneers (21), an aluminum alloy opening fan profile (22), an aluminum alloy opening frame profile (23), a heat-insulating rubber belt (24), a second heat-insulating layer (25) and a hinge (26); the heat-insulating rubber belt (24) is arranged below the edge of the inspection port cover (2); the aluminum alloy opening fan profile (22) is located below the aluminum veneer (21), and its periphery is fixedly connected to the heat-insulating rubber belt (24); the aluminum alloy opening frame profile (23) is located between the aluminum alloy opening fan profile (22) and the heat-insulating rubber belt (24); The hinge (26) is located at one end of the aluminum alloy opening fan profile (22), and the two opened ends of the hinge (26) are respectively fixedly connected to the aluminum alloy opening fan profile (22) and the aluminum alloy opening frame profile (23). The second insulation layer (25) is arranged in a gap formed by two upper and lower aluminum veneers (21), and the two aluminum veneers (21) are fixedly connected by the aluminum alloy opening fan profile (22) and fasteners. A composite angle steel support (5) for supporting a steel plate roof panel (20) is provided on the outer wall of the inspection opening body (1) located above the main roof structure, and the composite angle steel support (5) is arranged along the circumference of the inspection opening body (1); a first steel plate edge plate (6) is fixedly provided between the composite angle steel support (5) and the steel plate roof panel (20); The outer side of the first steel plate edge trimming plate (6) is provided with a waterproof coating (10), and the waterproof coating (10) is a double-layer structure, which extends to the plate ribs of the steel plate roof panel (20) on all sides, and is turned up and fixed to the upper side of the first steel plate edge trimming plate (6) at the vertical surface of the inspection port body (1).

2. The steel plate roof inspection opening sealing system according to claim 1, characterized in that: The inspection opening keel (11) is made of a steel square tube and comprises a circumferentially arranged bottom cross-bracing keel (111), a vertical column keel (112) and a circumferentially arranged top cross-bracing keel (113). The bottom cross-bracing keel (111) forms a "well" grid structure, and both ends of each bottom cross-bracing keel (111) are fixed in the main roof structure; the vertical column keels (112) are fixedly arranged in a square shape above the bottom cross-bracing keel (111), and the top cross-bracing keel (113) is fixed above the vertical column keels (112).

3. The steel plate roof inspection opening sealing system according to claim 2, characterized in that: The top elevations of the plurality of vertical column keels (112) are consistent, and the height of the vertical column keels (112) is such that the roof flashing height at the water-facing surface of the system is greater than or equal to 250 mm.

4. The steel plate roof inspection opening sealing system according to claim 2, characterized in that: The steel bottom plate edge plate (12) is an "L"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel (111), and its top bent outward and fixed to the side of the top cross-bracing keel (113); the steel plate sealing plate (13) is a "Z"-shaped structure, with its bottom fixed to the side of the bottom cross-bracing keel (111), and its top fixed to the bottom of the roof bottom plate (30) of the roof main structure.

5. The steel plate roof inspection opening sealing system according to claim 4, characterized in that: A TPO waterproof layer (4) is provided on the upper edge of the main roof structure. The TPO waterproof layer (4) is folded up along the inspection port keel (11) near the inspection port body (1) to the side wall of the top cross-bracing keel (113), and is fixed and sealed with the side wall of the top cross-bracing keel (113).

6. The steel plate roof inspection opening sealing system according to claim 5, characterized in that: The TPO waterproof layer (4) is composed of two layers, namely, a roof-upturned TPO layer (41) and an additional TPO layer (42). The roof-upturned TPO layer (41) is turned up along the inspection opening keel (11) to the side wall of the top cross-bracing keel (113) near the inspection opening body (1). The additional TPO layer (42) is arranged on the outside of the roof-upturned TPO layer (41). The additional TPO layer (42) is turned up along the inspection opening keel (11) to the top of the roof-upturned TPO layer (41) and is tightly sealed against the side wall of the top cross-bracing keel (113), ensuring that the additional TPO layer (42) completely covers the roof-upturned TPO layer (41).

7. The steel plate roof inspection opening sealing system according to claim 2, characterized in that: Sealant is used to seal the overlapping ends of the steel plate roof panel (20) and the first steel plate edge plate (6), and one end of the first steel plate edge plate (6) away from the steel plate roof panel (20) is turned upward along the outer wall of the inspection port body (1) to below the top cross-bracing keel (113); a second steel plate edge plate (7) is fixed to the side of the top cross-bracing keel (113), and the lower end of the second steel plate edge plate (7) is connected to the upper end of the first steel plate edge plate (6) in a mutually interlocking state.

8. The steel plate roof inspection opening sealing system according to claim 7, characterized in that: The composite angle steel supports (5) at both ends of the inspection port body (1) along the water flow direction are respectively provided with eaves inner sealing plates (8), the eaves inner sealing plates (8) are fixed to the plate ribs of the steel plate roof panel (20), and the connection between the steel plate roof panel (20) and the eaves inner sealing plates (8) is sealed with sealant.

9. The steel plate roof inspection opening sealing system according to claim 8, characterized in that: The first steel plate edge plate (6) is fixedly provided between the composite angle steel support (5) and the eaves inner sealing plate (8), and one end of the first steel plate edge plate (6) is turned upward along the outer wall of the inspection port body (1), forming a water guide groove (9) between the inspection port body (1) and the eaves inner sealing plate (8).

10. A method for installing a steel plate roof inspection opening sealing system, characterized in that: The following steps are involved: S1. Installation of the inspection port: S1-1, install the bottom cross bracing keel (111) at the inspection port, rooted on the main structure of the roof to form a "well" grid; install the vertical column keel (112) on the top of the bottom cross bracing keel (111), the vertical column keel (112) is arranged in a square, and the inner clearance is 800mm-1200mm, and make a circle of top cross bracing keel (113) on the top of the vertical column keel (112); S1-2, installing an L30*3mm composite angle steel support (5) supporting the steel plate roof panel (20) on the outside of the vertical column keel (112), and the composite angle steel support (5) is arranged along the circumference of the inspection port body (1); S1-3, install the steel bottom plate edge plate (12) on the inner side of the vertical column keel (112), the steel bottom plate edge plate (12) is "L" shaped, the upper end is fixed to the side of the top cross bracing keel (113), and the lower end is fixed to the side of the bottom cross bracing keel (111) through self-tapping screws (50); fix the lower side of the steel plate sealing plate (13) located on the outer side of the vertical column keel (112) to the side of the bottom cross bracing keel (111), and fix the upper side to the bottom of the roof bottom plate (30) through rivets; S1-4, filling the vertical space formed by the vertical column keel (112), the steel bottom plate edge plate (12) and the steel plate cover plate (13) with a first insulation layer (14), and laying the double insulation layer in a staggered manner; S2. TPO waterproof layer installation: The roof TPO layer (41) is turned up along the inspection port keel (11) near the inspection port body (1) to the side wall of the top cross-bracing keel (113), and is fixed and sealed with the side wall of the top cross-bracing keel (113). Then, an additional TPO layer (42) is made, and the roof TPO layer (41) is completely covered on its lower inner side. The upper side of the additional TPO layer (42) is closely attached to one side of the inspection port keel (11), and is sealed with a silicone weatherproof sealant (60); S3. Installation of steel plate edge trim: The first steel plate edge trimming plate (6) is placed above the composite angle steel support (5), and the first steel plate edge trimming plate (6) is fixed to the full-length angle steel by rivets, and is located below the steel plate roof panel (20), and the steel plate roof panel (20) is cut to a corresponding flow width, and the edge of the steel plate roof panel (20) and the first steel plate edge trimming plate (6) are connected by rivets, and the longitudinal spacing of the rivets is 100 mm. Two layers of silicone weatherproof sealant (60) are applied between the steel plate roof panel (20) and the first steel plate edge trimming plate (6), and the two layers of sealant are respectively located at the two overlapping ends of the plates, and after the rivets are fixed on the edge trimming plate, the glue is applied to the nail head position for sealing; then the second steel plate edge trimming plate (7) is fixed on the side of the cross bracing keel (113) at the top of the inspection port, and the second steel plate edge trimming plate (7) and the first steel plate edge trimming plate (6) are in a mutually engaged state; S4. Waterproof coating installation: Two layers of waterproof coating (10) are applied on the outside of the first steel plate edge plate (6), which are extended to the ribs of the steel plate roof panel (20) on all sides and are turned up and fixed to the upper side of the first steel plate edge plate (6) at the vertical surface of the inspection port body (1); S5. Installation of inspection cover: First, the aluminum alloy opening frame profile (23) is fixed above the top cross-bracing keel (113), the aluminum alloy opening fan profile (22) is placed above the aluminum alloy opening frame profile (23), and a hinge (26) is installed at one end thereof so that the two ends of the hinge (26) are fixedly connected to the aluminum alloy opening frame profile (23) and the aluminum alloy opening fan profile (22) respectively. Then, the upper and lower aluminum single plates (21) are installed, and the upper and lower aluminum single plates (21) are connected together by the aluminum alloy opening fan profile (22) and fasteners. The four sides are sealed by a heat-insulating rubber belt (24), and a 100mm cavity is formed in the middle. The second insulation layer (25) of rock wool is filled to form a finished inspection port cover (2). Finally, the inspection port cover (2) is fixed on the inspection port body (1) in an openable and closable manner, and an opening handle (3) is provided at the lower end of the inspection port cover (2). An electric push rod (70) is installed.

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