Waterproof structure and method for metal roof repair with photovoltaic clamps

Abstract

The application discloses a waterproof structure and method for repairing a metal roof with a photovoltaic clamp, and relates to the technical field of metal roof waterproofing. The method comprises the following steps: laying a large-area waterproof roll on the metal roof; cutting a notch on the large-area waterproof roll, the notch being capable of accommodating the clamping end of the photovoltaic clamp; covering a sealing waterproof roll on the notch; clamping the photovoltaic clamp on the corresponding plate rib of the notch through the sealing waterproof roll; and sealingly connecting the sealing waterproof roll and the large-area waterproof roll. The method cuts a notch on the large-area waterproof roll laid on the metal roof, covers the notch with a sealing waterproof roll, and then clamps the photovoltaic clamp on the plate rib corresponding to the notch through the sealing waterproof roll, so that the sealing waterproof roll is deformed freely, and finally, the sealing waterproof roll is sealingly connected with the large-area waterproof roll, thereby avoiding damage to the large-area waterproof roll caused by the clamping of the photovoltaic clamp.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metal roof waterproofing, and more particularly relates to a waterproof structure and method for repairing a metal roof with a photovoltaic clamp. BACKGROUND

[0002] Industrial building production workshops have large available roof areas and no high obstructions around the periphery, making them the best places for installing distributed photovoltaics. As major energy consumers, manufacturing enterprises can change their energy structure by installing photovoltaic modules on the roof, use more clean energy, and reduce carbon emissions. At the same time, they can enjoy discounts on peak electricity prices, bringing considerable economic benefits to the enterprise. Most of the industrial plants that have been built use double-layered profiled steel sheets, i.e., metal roofs, as the enclosure of the building. The metal roof is combined with distributed photovoltaics using a clamp, which is fixed to the ribs of the profiled steel sheet. The clamp provides a mounting base for the roof distributed photovoltaics. However, the metal roof is limited by the material of the steel sheet, and the joints of the sheet are connected using rigid snap joints, supplemented by flexible materials as sealing and plugging measures. As the building is put into formal use, the joints are prone to be not tightly sealed, causing roof leakage. In addition, the roof needs to be provided with a daylighting band and a fan opening to meet the building's lighting and ventilation needs. The increase in detail nodes further increases the probability of roof leakage. The service life of roof distributed photovoltaics is generally 25 years. If the roof frequently leaks, the building cannot meet the normal production needs of the enterprise, and the photovoltaic modules need to be repeatedly disassembled and reassembled for roof waterproofing and maintenance, increasing the secondary investment. Moreover, the disassembly and assembly process can easily cause irreparable damage to the modules, greatly shortening the service life of the roof distributed photovoltaic power station.

[0003] The current common method for repairing metal roofs is to use acrylic paint and self-adhesive bitumen waterproofing membranes for local repair. However, due to the material's aging resistance and the limitations of the construction site, it is often a temporary repair measure. Roof maintenance needs to be performed again after 2-3 years. Once photovoltaic modules are installed, there is no construction space on the roof, and the photovoltaic modules need to be removed before the roof can be maintained. Figure 1 As shown in the figure, the metal roof 1 and the photovoltaic connection are usually in the form of a photovoltaic clamp 2. The metal roof 1 is provided with a protruding rib 3, and the two sides of the rib 3 are provided with grooves 4. The upper part of the photovoltaic clamp 2 is provided with a photovoltaic connecting plate 5, and the lower part of the photovoltaic clamp 2 can be clamped in the groove 4 of the rib 3. In this way, the photovoltaic clamp 2 is mechanically connected to the metal roof 1 and snap-fitted to the rib 3 of the profiled steel sheet of the metal roof 1. When performing waterproofing repair on such a metal roof 1, if a large-area waterproofing membrane 6 is laid on the metal roof 1, the large-area waterproofing membrane 6 will be suspended at the groove 4, and when the lower part of the photovoltaic clamp 2 is clamped in the groove 4 of the rib 3, the large-area waterproofing membrane 6 at this position will be subjected to tension and locally deformed, which can easily cause damage to the large-area waterproofing membrane 6 and result in a failure of the waterproofing. SUMMARY

[0004] The present application aims at providing a waterproof structure and method for repairing a metal roof with photovoltaic clamps to solve the above problems.

[0005] To achieve the above object, the present application provides a waterproof structure for repairing a metal roof with photovoltaic clamps, wherein the metal roof is provided with protruding plate ribs, and the plate ribs are provided with grooves on both sides, and the lower part of the photovoltaic clamp can be clamped in the groove of the plate rib, and the structure comprises:

[0006] a large-area waterproof roll laid on the metal roof;

[0007] a notch opened on the large-area waterproof roll, which can accommodate the clamping end of the photovoltaic clamp to pass through, and the position of the notch corresponds to the position of the plate rib;

[0008] a sealing waterproof roll covered on the upper side of the notch and sealedly connected with the large-area waterproof roll;

[0009] the photovoltaic clamp is clamped on the plate rib through the sealing waterproof roll.

[0010] The present application also provides a waterproof method for repairing a metal roof with photovoltaic clamps to obtain the above waterproof structure for repairing a metal roof with photovoltaic clamps, and the method comprises:

[0011] laying a large-area waterproof roll on the metal roof;

[0012] cutting a notch on the large-area waterproof roll, which can accommodate the clamping end of the photovoltaic clamp to pass through;

[0013] covering a sealing waterproof roll at the notch;

[0014] clamping a photovoltaic clamp on the plate rib corresponding to the notch through the sealing waterproof roll;

[0015] sealingly connecting the sealing waterproof roll with the large-area waterproof roll.

[0016] Optionally, before laying the large-area waterproof roll on the metal roof, the method further comprises:

[0017] Cleaning the upper surface of the metal roof.

[0018] Optionally, the cleaning the upper surface of the metal roof comprises:

[0019] Removing water, debris and foreign matter on the upper surface of the metal roof.

[0020] Removing rust on the metal roof.

[0021] Optionally, the laying the large-area waterproofing membrane on the metal roof comprises:

[0022] Performing a line laying;

[0023] Pre-laying the large-area waterproofing membrane to ensure that the long edge lap position of the large-area waterproofing membrane is on the planar portion between the adjacent plate ribs of the metal roof;

[0024] The pre-laid large-area waterproofing membrane is left for a set period of time.

[0025] Optionally, the laying the large-area waterproofing membrane on the metal roof further comprises:

[0026] Applying glue on the pre-laid large-area waterproofing membrane and the upper surface of the metal roof;

[0027] Bonding the large-area waterproofing membrane to the upper surface of the metal roof.

[0028] Optionally, the notch is cut on the large-area waterproofing membrane according to the clamping position of the photovoltaic clamp.

[0029] Optionally, it further comprises obtaining the sealing waterproofing membrane by cutting, the sealing waterproofing membrane being capable of completely covering the notch and forming a sealing lap edge on the outer periphery of the notch.

[0030] Optionally, the sealing lap edge of the sealing waterproofing membrane is welded to the large-area waterproofing membrane.

[0031] Optionally, the large-area waterproofing membrane is a thermoplastic polyolefin (TPO) waterproofing membrane, the sealing waterproofing membrane is a thermoplastic polyolefin (TPO) waterproofing membrane, and when the sealing waterproofing membrane covers the upper side of the notch, the non-woven fabric surface of the sealing waterproofing membrane faces upward.

[0032] The present application provides a waterproof structure and method for repairing a metal roof with a photovoltaic clamp, which has the beneficial effect that the structure and method cut a notch on a large-area waterproofing membrane laid on a metal roof, then cover the notch with a sealing waterproofing membrane, and then clamp the photovoltaic clamp on the plate rib corresponding to the notch through the sealing waterproofing membrane, so that the sealing waterproofing membrane deforms freely first, and finally the sealing waterproofing membrane and the large-area waterproofing membrane are sealed and connected, avoiding damage to the large-area waterproofing membrane caused by clamping of the photovoltaic clamp.

[0033] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures.

[0035] Figure 1 A schematic view of a prior art metal roof repair structure with photovoltaic clamps is shown.

[0036] Figures 2 to 5 Successively shown are schematic structural state views of four steps of a waterproofing method for a metal roof repair with photovoltaic clamps according to one embodiment of the present application.

[0037] Figure 6 A partial structural schematic view of a plate rib and a photovoltaic clamp is shown.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 1, metal roof; 2, photovoltaic clamp; 3, plate rib; 4, groove; 5, photovoltaic connecting plate; 6, large-area waterproofing membrane; 7, notch; 8, sealing waterproofing membrane. DETAILED DESCRIPTION

[0040] Preferred embodiments of the present application will be described in greater detail below. While the preferred embodiments of the present application are described below, it is to be understood that the present application can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.

[0041] As shown in the drawings, Figure 1 The metal roof 1 and the photovoltaic connection are usually in the form of a photovoltaic clamp 2, the metal roof 1 is provided with a plate rib 3 in the form of a protrusion, the plate rib 3 is provided with a groove 4 on both sides, the upper part of the photovoltaic clamp 2 is provided with a photovoltaic connecting plate 5, and the lower part of the photovoltaic clamp 2 can be clamped in the groove 4 of the plate rib 3; in this way, the photovoltaic clamp 2 is mechanically connected with the metal roof 1 and engages the plate rib 3 of the profiled steel sheet of the metal roof 1. When performing waterproofing repair of such a metal roof 1, if a large-area waterproofing membrane 6 is laid on the metal roof 1, the large-area waterproofing membrane 6 will be suspended at the groove 4, and when the lower part of the photovoltaic clamp 2 is clamped in the groove 4 of the plate rib 3, the large-area waterproofing membrane 6 at this position will be subjected to tension and locally deformed, which is likely to cause damage to the large-area waterproofing membrane 6 and result in waterproofing failure.

[0042] To solve the above technical problems, as shown in Figures 2 to 5 The application provides a waterproof structure for repairing a metal roof with a photovoltaic clamp, the metal roof 1 is provided with a protruding plate rib 3, both sides of the plate rib 3 are provided with a groove 4, the lower part of the photovoltaic clamp 2 can be clamped in the groove 4 of the plate rib 3, and the structure comprises:

[0043] A large-area waterproof coiled material 6 is laid on the metal roof 1.

[0044] A gap 7 is formed in the large-area waterproof coiled material 6, the gap 7 can accommodate the clamping end of the photovoltaic clamp 2 to pass through, and the position of the gap 7 corresponds to the position of the plate rib 3.

[0045] A sealing waterproof coiled material 8 covers the upper side of the gap 7 and is sealingly connected with the large-area waterproof coiled material 6.

[0046] The photovoltaic clamp 2 is clamped on the plate rib 3 through the sealing waterproof coiled material 8.

[0047] Specifically, the large-area waterproof coiled material 6 laid on the metal roof 1 is provided with the gap 7, the gap 7 is covered by the sealing waterproof coiled material 8 to ensure the sealing performance, the photovoltaic clamp 2 is clamped on the plate rib 3 through the sealing waterproof coiled material 8, the deformation of the coiled material caused by the photovoltaic clamp 2 is borne by the sealing waterproof coiled material 8, and the sealing connection between the sealing waterproof coiled material 8 and the large-area waterproof coiled material 6 is performed after the photovoltaic clamp 2 is clamped, so that the damage of the large-area waterproof coiled material 6 caused by the clamping of the photovoltaic clamp 2 can be avoided.

[0048] Further, the gap 7 can accommodate the clamping end of the photovoltaic clamp 2 to pass through, the opening size of the gap 7 is greater than the contour size of the clamping end of the photovoltaic clamp 2, and when the clamping end of the photovoltaic clamp 2 clamps the sealing waterproof coiled material 8, the large-area waterproof coiled material 6 around the gap 7 cannot be clamped.

[0049] Optionally, the cross section of the plate rib 3 is an isosceles triangle protruding to one side of the metal roof 1, and the two waists of the isosceles triangle are provided with the grooves 4 recessed to the sides close to each other.

[0050] Specifically, the metal roof 1 is a metal plate, and the plate rib 3 is formed by bending the metal roof 1, and the cross section shape is as shown in Figure 6 The setting of the groove 4 facilitates the clamping of the lower end of the photovoltaic clamp 2.

[0051] Optionally, the photovoltaic clamp 2 comprises a first clamping part and a second clamping part, the upper ends of the first clamping part and the second clamping part are movably connected, the middle parts of the first clamping part and the second clamping part are connected through a clamping bolt, and the lower ends of the first clamping part and the second clamping part are in a Z-shaped cross section and are symmetrically arranged.

[0052] Specifically, the structure of the photovoltaic clamp is as shown in Figure 6As shown, during the clamping process, the lower ends of the first clamping part and the second clamping part form a clamping gap on the side that is close to each other, and the lower ends of the first clamping part and the second clamping part form a part that protrudes towards the side that is close to each other and forms a clamping end, which can be clamped in the groove 4.

[0053] The present invention also provides a waterproofing method for repairing metal roofs with photovoltaic clamps, for obtaining the above-mentioned waterproofing structure for repairing metal roofs with photovoltaic clamps, the method comprising:

[0054] Lay a large-area waterproof membrane 6 on the metal roof 1;

[0055] Cut a notch 7 in the large waterproof membrane 6, the notch 7 being able to accommodate the photovoltaic clamp 2 passing through;

[0056] Cover the gap 7 with sealing waterproof membrane 8;

[0057] The photovoltaic clamp 2 is held in place on the plate rib 3 corresponding to the notch 7 through the sealing waterproof membrane 8;

[0058] Seal the sealing waterproof membrane 8 to the large-area waterproof membrane 6.

[0059] Specifically, such as Figure 2 As shown, first lay a large-area waterproof membrane 6 on the metal roof 1; then, as... Figure 2 As shown, cut a notch 7 on the large waterproof membrane 6; then, as... Figure 4 As shown, cover the gap 7 with sealing waterproof membrane 8; then, as... Figure 5 As shown, the photovoltaic clamp 2 is held in place on the rib 3 corresponding to the notch 7 through the sealing waterproof membrane 8; finally, the sealing waterproof membrane 8 is sealed and connected to the main waterproof membrane 6. This method involves cutting a notch 7 in the main waterproof membrane 6 laid on the metal roof 1, covering the notch 7 with the sealing waterproof membrane 8, then holding the photovoltaic clamp 2 in place on the rib 3 corresponding to the notch 7 through the sealing waterproof membrane 8, allowing the sealing waterproof membrane 8 to deform freely first, and finally sealing and connecting the sealing waterproof membrane 8 to the main waterproof membrane 6, thus avoiding damage to the main waterproof membrane 6 caused by the clamping of the photovoltaic clamp 2.

[0060] Optionally, before laying the large-area waterproof membrane 6 on the metal roof 1, the following steps are also included:

[0061] Clean the upper surface of metal roof 1.

[0062] Specifically, to ensure the bonding effect between the large-area waterproof membrane 6 and the upper surface of the metal roof 1, the upper surface of the metal roof 1 is cleaned in advance.

[0063] Optionally, cleaning the upper surface of the metal roof 1 includes:

[0064] Remove the water, debris and foreign matter on the upper surface of the metal roof 1;

[0065] Remove the rust on the metal roof 1.

[0066] Specifically, the debris can be soil, paint chips and the like on the upper surface of the metal roof 1, and the foreign matter includes plastic bags, fallen leaves, dry branches and the like. After the water, debris and foreign matter on the upper surface of the metal roof 1 are cleaned, the rusted part of the metal roof 1 can be derusted by using a polishing type rust removal device, thereby improving the bonding effect of the large-area waterproofing membrane 6 and the metal roof 1.

[0067] Optionally, the laying of the large-area waterproofing membrane 6 on the metal roof 1 comprises:

[0068] Perform the line laying;

[0069] Pre-lay the large-area waterproofing membrane 6 to ensure that the long edge lap position of the large-area waterproofing membrane 6 is on the planar portion between the adjacent plate ribs 3 of the metal roof 1;

[0070] The pre-laid large-area waterproofing membrane 6 is placed for a set period of time.

[0071] Specifically, first, the line laying is performed. During construction, the pre-laying of the large-area waterproofing membrane 6 is performed first. The naturally loose membrane is arranged on the steel plate of the metal roof 1 according to the contour, is flat and straight, is not twisted, has a lap width of 80 mm, and is appropriately cut to ensure that the long edge lap position is on the planar portion between the adjacent plate ribs 3 of the metal roof 1, which is beneficial to the wrapping and lapping effect. When the large-area waterproofing membrane 6 is laid, the long edge direction of the membrane is parallel to the long edge direction of the steel plate of the metal roof 1, and the long edge lapping direction of the membrane should be according to the local annual maximum frequency wind direction. After the large-area waterproofing membrane 6 is pre-laid and unfolded, it should be placed for 15-30 minutes to fully release the internal stress of the membrane and avoid wrinkles during welding.

[0072] Optionally, the laying of the large-area waterproofing membrane 6 on the metal roof 1 further comprises:

[0073] Glue is applied to the upper surface of the pre-laid large-area waterproofing membrane 6 and the metal roof 1;

[0074] The large-area waterproofing membrane 6 is bonded to the upper surface of the metal roof 1.

[0075] Specifically, the pre-laid large-area waterproofing membrane 6 that passes the size inspection and is cut to size is fully bonded to the metal roof 1.

[0076] Optionally, a notch 7 is cut in the large-area waterproofing membrane 6 according to the clamping position of the photovoltaic clamp 2.

[0077] Specifically, the clamping position of the photovoltaic clamp 2 can be determined with reference to its original clamping position or according to the top view installation position diagram provided by the photovoltaic installation manufacturer. The installation position of the photovoltaic clamp 2 is used to cut a notch 7 on the large-area waterproofing membrane 6. The cut waterproofing membrane is removed to expose the metal roof 1.

[0078] Optionally, the sealing waterproofing membrane 8 is obtained by cutting. The sealing waterproofing membrane 8 can completely cover the notch 7 and form a sealing lap edge around the notch 7.

[0079] Specifically, the sealing waterproofing membrane 8 is obtained by cutting according to the size of the notch 7. The sealing waterproofing membrane 8 is larger than the notch 7 and can completely cover the notch 7 and reserve a sealing lap edge for subsequent connection of the sealing waterproofing membrane 8 and the large-area waterproofing membrane 6.

[0080] Optionally, the sealing lap edge of the sealing waterproofing membrane 8 is welded to the large-area waterproofing membrane 6.

[0081] Specifically, the sealing lap edge of the sealing waterproofing membrane 8 is sealed and connected to the large-area waterproofing membrane 6 by hot melt welding to achieve a waterproof effect.

[0082] Optionally, the large-area waterproofing membrane 6 is a thermoplastic polyolefin TPO waterproofing membrane, and the sealing waterproofing membrane 8 is a thermoplastic polyolefin TPO waterproofing membrane. When the sealing waterproofing membrane 8 covers the upper side of the notch 7, the non-woven fabric side of the sealing waterproofing membrane 8 faces upward.

[0083] Specifically, the entire repair and modification is performed using the thermoplastic polyolefin TPO waterproofing membrane specially used for metal roof 1 repair. The membrane has good softness and is light and thin, so that the large-area waterproofing membrane 6 can be completely attached to the plate shape of the plate rib 3 of the metal roof 1 to ensure that the large-area waterproofing membrane 6 has a high full adhesion rate with the metal roof 1. The sealing waterproofing membrane 8 has a non-woven fabric side facing outward. The sealing waterproofing membrane 8 is covered on the upper side of the notch 7 before the photovoltaic clamp 2 is installed. The sealing waterproofing membrane 8 is not constrained because it is only placed on the notch 7 and has not been connected to the large-area waterproofing membrane 6. When the photovoltaic clamp 2 extrudes the sealing waterproofing membrane 8, the sealing waterproofing membrane 8 can deform and attach to the plate rib 3 of the metal roof 1 along with the photovoltaic clamp 2. Thus, the sealing waterproofing membrane 8 can resist deformation relying on its own physical properties, and the phenomenon of membrane damage in a long-term clamping environment is avoided. In addition, the non-woven fabric side of the sealing waterproofing membrane 8 can increase the friction between the photovoltaic clamp 2 and the sealing waterproofing membrane 8 to avoid the phenomenon of slipping and loosening of the photovoltaic clamp 2.

[0084] In summary, when the waterproof method for repairing the metal roof 1 with the photovoltaic clamp 2 is implemented, the construction steps include:

[0085] 1. Base treatment: Because the original metal roof 1 has been used for a long time, there are a lot of water, debris, and foreign matter, rust, so before laying the coil material, the modified bitumen waterproof coil material or waterproof coating used for local repair of the metal roof 1 is removed, and the rust removal treatment is carried out, and the profiled steel plate of the metal roof 1 is ensured to have reliable connection with the main structure, the connection between the plates is smooth and continuous, and the damaged places need to be repaired.

[0086] 2. Pre-paving large-area waterproof coil 6: first, perform the line laying, and first pre-pave the large-area waterproof coil 6 during construction, arrange the naturally loose coil according to the contour on the steel plate of the metal roof 1, smooth and straight, do not twist, the lap width is 80mm, and appropriate cutting is carried out to ensure that the long side lap position is on the planar portion between the adjacent plate ribs 3 on the metal roof 1, which is beneficial to the wrapping and lapping effect.

[0087] When laying the large-area waterproof coil 6, the long side direction of the coil is parallel to the long side direction of the steel plate of the metal roof 1, and the long side lap direction of the coil should be according to the local annual maximum frequency wind direction.

[0088] After the large-area waterproof coil 6 is pre-paved and spread, it should be placed for 15-30 minutes to fully release the internal stress of the coil and avoid wrinkles during welding.

[0089] 3. Paste large-area waterproof coil 6: use small manual scraping equipment to evenly scrape the coil adhesive on the surface of the large-area waterproof coil 6 and the profiled steel plate of the metal roof 1 according to the dosage, do not allow the phenomenon of missed coating and adhesive accumulation, when the adhesive is semi-dry and not sticky, the adhesive surface of the large-area waterproof coil 6 is bonded to the upper surface of the metal roof 1, and the coil is pressed with a roller. The lap area of the coil is not coated with a base adhesive.

[0090] 4. Large-area waterproof coil 6 lap: the long side of the large-area waterproof coil 6 uses a lap joint, and the lap length is 80mm; the short side uses a butt joint, and the upper part is covered with a homogeneous coil.

[0091] 5. Hot air welding: the photovoltaic clamp 2 is clamped on the plate rib 3 corresponding to the notch 7 through the sealing waterproof coil 8, then the sealing waterproof coil 8 and the large-area waterproof coil 6 are welded, a handheld hot air welding gun is used for hot air welding, and a special hook needle is used to detect the welding quality.

[0092] 6. Detail node processing: coil closing, TPO waterproof coil closing is fixed with professional closing strips and closing screws, and general sealant is used for sealing.

[0093] Having described various embodiments of the application, it is to be understood that the above description is meant to be illustrative only, and that many modifications and variations of the embodiments are possible without departing from the scope and spirit of the described embodiments. Many modifications and variations of the described embodiments are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the described embodiments can be practiced otherwise than as specifically described.

Claims

1. A waterproof structure for repair of a metal roof provided with protruding panel ribs, both sides of the panel ribs being provided with grooves, a lower portion of a photovoltaic clip being capable of being clamped in the grooves of the panel ribs, characterized in that, The structure comprises: ​ a large-area waterproofing membrane laid on the metal roof; a notch cut in the large-area waterproofing membrane, the notch being capable of accommodating the clamping end of the photovoltaic clamp to pass through, the notch being positioned corresponding to the position of the panel rib; a sealing waterproofing membrane covering the upper side of the notch and being sealed and connected with the large-area waterproofing membrane after the photovoltaic clamp is clamped; the photovoltaic clamp being clamped on the panel rib through the sealing waterproofing membrane.

2. A waterproofing method for a metal roof repair with photovoltaic clamps for obtaining a waterproof structure for a metal roof repair with photovoltaic clamps according to claim 1, characterized in that, The method comprises: laying a large-area waterproofing membrane on the metal roof; cutting a notch in the large-area waterproofing membrane, the notch being capable of accommodating the clamping end of the photovoltaic clamp to pass through; covering a sealing waterproofing membrane at the notch; clamping a photovoltaic clamp on the panel rib corresponding to the notch through the sealing waterproofing membrane; sealing and connecting the sealing waterproofing membrane with the large-area waterproofing membrane.

3. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 2, wherein, Before laying a large-area waterproofing membrane on the metal roof, it further comprises: cleaning the upper surface of the metal roof.

4. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 3, wherein, The cleaning of the upper surface of the metal roof comprises: removing water, debris and foreign matter on the upper surface of the metal roof; removing rust on the metal roof.

5. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 2, wherein, The laying of the large-area waterproofing membrane on the metal roof comprises: performing a line setting; pre-laying the large-area waterproofing membrane to ensure that the long-side overlapping position of the large-area waterproofing membrane is on the planar portion between the adjacent panel ribs of the metal roof; allowing the pre-laid large-area waterproofing membrane to stand for a set period of time.

6. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 5, wherein, The laying of the large-area waterproofing membrane on the metal roof further comprises: applying glue on the pre-laid large-area waterproofing membrane and the upper surface of the metal roof; adhering the large-area waterproofing membrane to the upper surface of the metal roof.

7. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 2, wherein, The notch is cut in the large-area waterproofing membrane according to the clamping position of the photovoltaic clamp.

8. The method of waterproofing a repair of a metal roof with a photovoltaic clip according to claim 2, wherein, It further comprises obtaining a sealing waterproofing membrane by cutting, the sealing waterproofing membrane being capable of completely covering the notch and forming a sealing overlapping edge around the notch.

9. The method of waterproofing a repair of a metal roof with a photovoltaic clip as defined in claim 8, wherein, The sealing overlapping edge of the sealing waterproofing membrane is welded with the large-area waterproofing membrane.

10. The method of waterproofing a repair of a metal roof with a photovoltaic clip of claim 2, wherein, The large-area waterproofing membrane is a thermoplastic polyolefin (TPO) waterproofing membrane, the sealing waterproofing membrane is a thermoplastic polyolefin (TPO) waterproofing membrane, and when the sealing waterproofing membrane covers the upper side of the notch, the non-woven fabric surface of the sealing waterproofing membrane faces upward.

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