CN116498014A - A roof sandwich panel and its processing and installation method - Google Patents

Abstract

The invention relates to a roof sandwich panel and a processing and installing method thereof, comprising an upper panel, a filling layer and a lower panel, wherein the male edge of the lower panel is provided with a locking nail platform, the locking nail platform is firmly connected with purlines, the locking nail platform is fixed with the upper panel through a local fastener and a prefabricated fastener to form a firm body, a supporting leg is arranged on the connecting platform to ensure that a screw is firm, the female edge of the lower panel is matched with the male edge, the lower panel of the female edge extends to the lower side of the male edge to be pressed by the male edge, the prefabricated fastener wraps the male edge of the upper panel, the female edge of the upper panel also wraps the prefabricated fastener of the local locking nail platform while the male edge is buckled, the prefabricated fastener is a firm transition body for connecting the upper panel and the lower panel, the thermal bridge of the upper panel and the lower panel can be reduced to the greatest extent, the heat preservation effect is ensured, the locking nail platform is a closed tubular section, the locking nail on the platform is firmly locked with the sandwich panel, a pre-hole is arranged on the closed tubular section, and polyurethane edge sealing material can flow into the closed tubular section to improve the strength of the sandwich panel, and the installation strength of the sandwich panel is improved.

Description

A roof sandwich panel and its processing and installation method

technical field

The invention relates to a sandwich panel, in particular to a roof sandwich panel and a processing and installation method thereof.

Background technique

Corrugated sandwich panels are used for building roofs, which require waterproofing, fire resistance, and heat preservation. Due to the popularization and application of new energy photovoltaic roofs, photovoltaic panels must be installed on corrugated sandwich panels, and higher requirements are put forward for the flexural strength and wind load of sandwich panels. Requirements, the products on the existing market also have a nail platform on the lower side of the board, and the nail platform is filled with polyurethane foam, but the nail platform is an open-loop structure. After the nail platform is pressed by screws, the nail platform is under the nail platform. The soft polyurethane foam has no rigid support body, and the support strength is weak, so the screws cannot be locked to the limit, and the screws will flatten the locking nail platform, resulting in loose screws, which greatly reduces the wind resistance of the sandwich panel; In the prior art, the wave crest in the middle of the sandwich panel is not fixed by nails, which will cause the middle corrugated and steel structure purlins to be completely suspended, and have no wind load resistance. Based on the above problems, it is necessary to design a roof sandwich with strong wind resistance plate.

Contents of the invention

Aiming at the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a roof sandwich panel and its processing and installation method, so as to solve one or more problems in the prior art.

To achieve the above object, the technical scheme of the present invention is as follows:

A roof sandwich panel, the two ends of the sandwich panel are respectively a male side and a female side, and the roof sandwich panel includes an upper board, a filling layer and a lower board arranged in sequence, and the male side of the lower board is formed into a locking nail platform , the locking nail platform extends outward beyond the male side of the upper plate, and the locking nail platform is a closed tubular profile surrounded by the plane of the lower plate, the locking nail surface, the supporting feet and the male and female mating surfaces, and the locking nail platform passes through The lower end of the fastener is fixedly connected to the purlin, and the locking nail platform is also connected to the public side of the upper plate through the fastener and the prefabricated fastener, that is, the upper plate, the lower plate and the purlin are connected by the fastener and the prefabricated fastener to form a As a whole, the female side of the lower plate is formed into a supporting platform, and the supporting platform extends to the underside of the locking nail platform of another roof sandwich panel, and the supporting platform is pressed onto the purlin through the locking nail platform, and the upper plate The female edge of the roof sandwich panel is connected to the prefabricated fastener connected to the nail platform of another roof sandwich panel. The filling layer includes a fire-resistant insulation layer in the middle of the upper panel and the lower panel and polyurethane foam edge sealing layers on both sides, and A number of pre-holes are provided on the nail surface or supporting feet of the nail platform to allow liquid polyurethane to enter the nail platform to close the tubular profile.

As a further improvement of the above technical solution:

The supporting feet are vertically supported to the lower plate.

The lower end of the supporting foot can be bent to form a horizontal supporting foot.

The supporting feet are located on the outer side of the upper plate, and the pre-holes are opened on the supporting feet of the locking nail platform.

The supporting feet are located within the common side of the upper plate, and the pre-holes are respectively opened on the supporting feet of the locking nail platform and the locking nail surface.

The pre-holes are opened through the supporting feet of the locking nail platform and the locking nail surface.

Several protruding reinforcing ribs are also formed on the upper plate, and the roof sandwich panel passes through the reinforcing ribs, the refractory insulation layer and the lower plate to connect purlins through fasteners, and shoulders are arranged on both sides of the reinforcing ribs, so that The above-mentioned reinforcing convex ribs are buckled and connected to the caps through the convex shoulders on both sides.

Expansion notches are provided on both sides of the cap in conjunction with the shoulders of the reinforcing ribs, and a sealing strip is provided between both sides of the cap and the reinforcing ribs.

A method for processing and installing a roof sandwich panel, comprising the following steps:

1) Unwinding: The plates for processing the upper plate and the lower plate are respectively uncoiled through the uncoiler;

2) Lower plate punching: pre-punching pre-holes on the corresponding position of the lower plate by means of roller punching or plane punching;

3) Forming: the upper plate is formed by a forming machine, and several reinforcing ribs are formed in the middle of the upper plate; the lower plate is formed into a locking nail platform and a supporting platform at both ends by a forming machine;

4) Filling layer filling: Spray adhesive on the lower side of the upper plate and the upper side of the lower plate, and glue and fill the refractory insulation material between the upper plate and the lower plate, and inject polyurethane material into the positions on both sides of the refractory insulation material , the initial state of the polyurethane foam material is liquid, and the liquid polyurethane foam material will enter the closed tubular profile of the locking nail platform through the pre-hole;

5) The roof sandwich panel is formed; after the filling layer is filled, it enters the crawler machine, and the product is pressed in the track machine, so that the refractory insulation material is formed into a fire-resistant insulation layer, and at the same time, the product is heated in the crawler machine to foam the polyurethane foam material to form polyurethane foam The edge banding layer seals the male and female sides of the roof sandwich panel. At the same time, the polyurethane foam material will also fill the inside of the closed tubular profile of the locking nail platform, and finally cut it into a roof sandwich panel of suitable size according to the length requirement;

6) Roof sandwich panel installation: Connect the prefabricated fasteners to the locking nail platform through fasteners, and the prefabricated fasteners are hooked to the public side of the upper plate, that is, the locking nail platform of the lower plate is connected to the upper plate through the prefabricated fasteners. The public side of the board is connected, and the lower end of the fastener also fixes the lower board to the purlin, and then the female side of another roof sandwich board is inserted into the male side of the connected roof sandwich board, so that the other roof sandwich board is lowered. The support platform formed on the mother side of the slab extends to the underside of the locking nail platform of the connected roof sandwich panel, and the support platform of the unconnected roof sandwich panel is pressed against the purlin through the locking nail platform of the connected roof sandwich panel, that is The unconnected roof sandwich panels can be pressed on the purlins through the connected roof sandwich panels, while the female sides of the unconnected roof sandwich panels are connected to the prefabricated fasteners of the connected roof sandwich panels, that is, the adjacent The connection between the male side and the female side of two roof sandwich panels, and then connect the public side of the unconnected roof sandwich panels to the purlins through fasteners and prefabricated fasteners, so that the roof sandwich panels can be connected together in turn, and with The purlins of the roof are fixedly connected.

As a further improvement of the above technical solution:

In step 6) when the roof sandwich panel is installed, all the roof sandwich panels can be further connected to the purlins of the roof through the reinforcement ribs of the upper panel, the fire-resistant insulation filling layer and the lower panel, and finally the cap is fastened to the The rib is reinforced, and the upper end of the rib is connected with the fastener and sealed together.

Compared with the prior art, the beneficial technical effects of the present invention are as follows:

1) The locking nail platform of the lower plate of the roof sandwich panel is a closed tubular profile surrounded by the lower plate plane, the locking nail surface and the supporting feet. Since the locking nail platform has supporting feet, it can provide a strong supporting force for the locking nail surface, tight The fasteners will not flatten the locking nail platform, and the locking nails are firmly connected, and the fastening will connect the upper plate, lower plate and purlins into a firm whole, which can improve the overall wind resistance of the roof sandwich panel and make the roof The installation of the sandwich panel is more reliable, and the locking nail platform has a pre-hole, which is convenient for liquid polyurethane foam to be filled into the closed tubular profile of the locking nail platform, and improves the strength of the common side of the lower panel of the sandwich panel;

2) The lower end of the supporting foot can be bent to form a horizontal supporting foot, which increases the supporting area of the supporting foot and further improves the supporting strength of the supporting foot;

3) The locking nail platform can have pre-holes on both the supporting feet and the locking nail surface to increase the area of the pre-holes. The hole can be connected through to form an L-shaped hole to further increase the area of the pre-hole;

4) Several protruding reinforcing ribs are also formed on the upper plate, which can improve the support strength and wind resistance of the roof sandwich panel, so that the roof sandwich panel meets the installation requirements of photovoltaic products, and the roof sandwich panel passes through the reinforcing ribs through screws, The insulation filling layer and the lower plate are connected to the roof purlins to ensure reliable connection of the roof sandwich panels, increase the wind resistance load, and further improve the wind resistance bearing capacity of the roof. In addition, the connection caps on the ribs are strengthened to cover the screws to prevent water leakage at the screws. Corrosion of steel plate;

5) The inner sides of the cap are provided with expansion notches at the positions of the protruding shoulders. The expansion notches ensure that the cap stably catches the protruding shoulders on both sides of the reinforcing ribs, and a sealing strip is provided between both sides of the cap and the reinforcing ribs, further Ensure the tightness and prevent rainwater from leaking from the screws at the reinforcing ribs to cause corrosion of the steel plate.

Description of drawings

Fig. 1 shows a cross-sectional view of the roof sandwich panel of Embodiment 1.

Fig. 2 shows a schematic diagram of the connection of two adjacent roof sandwich panels in the first embodiment.

Fig. 3 shows the front view of the lower panel of the roof sandwich panel of the first embodiment.

Fig. 4 shows a sectional view of A-A in Fig. 3 .

Fig. 5 shows a schematic diagram of the connection of two adjacent roof sandwich panels in the second embodiment.

Fig. 6 shows the front view of the lower panel of the roof sandwich panel in the second embodiment.

Fig. 7 shows a cross-sectional view of B-B in Fig. 6 .

Fig. 8 shows a schematic diagram of the connection of two adjacent roof sandwich panels in the third embodiment.

Fig. 9 shows a schematic structural view of the lower panel of the roof sandwich panel in the third embodiment.

Fig. 10 shows a schematic diagram of the connection of two adjacent roof sandwich panels in Embodiment 4.

Fig. 11 shows a schematic structural view of the lower panel of the roof sandwich panel in Embodiment 4.

Fig. 12 shows a schematic diagram of the processing flow of the roof sandwich panels of the first to fourth embodiments.

Marked in the attached drawings:

1. Upper plate; 11. Reinforced rib; 111. Protruding shoulder; 2. Lower plate; 21. Locking nail platform; 211. Lower plate plane; 212. Locking nail surface; 213. Supporting feet; 214. Pre-hole; 215 , supporting feet; 216, male and female mating surfaces; 22, supporting platform; 3, prefabricated fasteners; 4, fire-resistant insulation layer; 5, polyurethane foam edge sealing layer;

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the device proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and all use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In order to make the objects, features and advantages of the present invention more comprehensible, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Conditions, so it has no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size shall fall within the scope of the present invention without affecting the effect and purpose of the present invention. within the scope covered by the disclosed technical content.

Embodiment one

As shown in Figures 1 to 4, in the roof sandwich panel of this embodiment, the two ends of the sandwich panel are respectively a male side and a female side, and the roof sandwich panel includes an upper board 1, a filling layer and a lower board 2 arranged in sequence, and the lower board 2. The male side is formed into a locking nail platform 21. The locking nail platform 21 extends outward beyond the male side of the upper plate 1. The locking nail platform 21 is composed of the lower plate plane 211, the locking nail surface 212, the vertical support feet 213 and the male and female mating The closed tubular profile surrounded by the surface 216, the supporting foot 213 is located on the outer side of the upper plate 1, the locking nail platform 21 is fixedly connected to the purlin through the lower end of the screw, and the locking nail platform 21 is also connected to the upper plate through the screw and the prefabricated fastener 3 The public side of 1, that is, the upper plate 1, the lower plate 2 and the purlins are connected into a whole through screws and prefabricated fasteners 3, and the female side of the lower plate 2 is formed into a support platform 22, which extends to another roof sandwich panel The lower side of the locking nail platform 21, and the supporting platform 22 is pressed onto the purlin through the locking nail platform 21, and the female side of the upper plate 1 is connected with the prefabricated fastener 3 connected to the locking nail platform 21 of another roof sandwich panel, filling The layer includes a fire-resistant insulation layer 4 in the middle of the upper plate 1 and the lower plate 2 and polyurethane foam edge sealing layers 5 on both sides, and the supporting feet 213 of the locking nail platform 21 are provided with a number of holes that allow liquid polyurethane to enter the locking nail platform 21. Pre-hole 214 of the tubular profile.

Several protruding reinforcing ribs 11 are also formed on the upper plate 1, which can improve the strength of the roof sandwich panel. The roof sandwich panel passes through the reinforcing ribs 11, the refractory insulation layer 4 and the lower plate 2 to connect the purlins through screws, and the reinforcing ribs 11 are two The shoulder 111 is arranged on the side, and the shoulder 111 on both sides of the reinforcing rib 11 is buckled to connect the cap 6. The two sides of the cap 6 cooperate with the shoulder 111 of the reinforcing rib 11 to set the expansion notch 61, and the two sides of the cap 6 are connected to the shoulder 111 of the rib 11. A sealing strip is arranged between the reinforcing ribs 11 to improve the sealing performance.

Embodiment two

As shown in Figures 5 to 7, the difference between the roof sandwich panel of this embodiment and Embodiment 1 is that the lower end of the support foot 213 can be bent to form a horizontal support foot 215, and the support area can be increased by the support foot 215 , the supporting strength of the supporting feet 213 can be further improved.

Embodiment three

As shown in Fig. 8 and Fig. 9, the difference between the roof sandwich panel of this embodiment and the first embodiment is that the supporting feet 213 are located within 1 common side of the upper plate, and the pre-holes 214 are respectively opened on the supporting feet of the locking nail platform 21. 213 and the locking nail surface 212, the area of the pre-hole 214 on the locking nail platform 21 is increased, which can improve the efficiency of the closed tubular profile filled with the liquid polyurethane foam material into the locking nail platform 21;

Embodiment four

As shown in Figure 10 and Figure 11, the difference between the roof sandwich panel of this embodiment and the third embodiment is that the lower end of the supporting foot 213 can be bent to form a horizontal supporting foot 215, and the pre-hole 214 is opened in the The "L" through-holes on the supporting feet 213 of the nailing platform 21 and the nailing surface 212 further increase the area of the pre-hole 214, which can further improve the efficiency of filling the closed tubular profile of the nailing platform 21 with liquid polyurethane foam ;

As shown in Figure 12, the roof sandwich panel processing method of Embodiments 1 to 4 comprises the following steps:

1) Unwinding: the plates processed on the upper plate 1 and the lower plate 2 are respectively uncoiled through the uncoiler;

2) Lower plate punching: pre-punching the pre-hole 214 at the corresponding position of the lower plate 2 by means of roller punching or plane punching;

3) Forming: the upper plate 1 is formed by a forming machine, and several reinforcing ribs 11 are formed in the middle of the upper plate 1; the lower plate 2 is formed into a locking nail platform 21 and a supporting platform 22 at both ends by a forming machine;

4) Filling layer filling: Spray adhesive on the lower side of the upper plate 1 and the upper side of the lower plate 2, and glue and fill the refractory insulation material between the upper plate 1 and the lower plate 2, and inject polyurethane material into the refractory thermal insulation material At the positions on both sides, the initial state of the polyurethane foam material is liquid, and the liquid polyurethane foam will enter the closed tubular profile of the locking nail platform 21 through the pre-hole 214;

5) The roof sandwich panel is formed; after the filling layer is filled, it enters the crawler machine, and the product is pressed in the crawler machine, so that the refractory insulation material is formed into a refractory insulation layer 4, and at the same time, the product is heated in the crawler machine to foam the polyurethane foam material to form polyurethane The foam edge layer 5 seals the male and female sides of the roof sandwich panel, and the polyurethane foam material will also fill the inside of the closed tubular profile of the locking nail platform 21, and finally cut it into a roof sandwich panel of suitable size according to the length requirement;

6) Roof sandwich panel installation: connect the prefabricated fastener 3 to the locking nail platform 21 through fasteners, and hook the prefabricated fastener 3 to the public side of the upper board 1, that is, connect the lower board 2 through the prefabricated fastener 3 The locking nail platform 21 is connected to the male side of the upper panel 1, and the lower end of the fastener also fixes the lower panel 2 to the purlin, and then inserts the female side of another roof sandwich panel into the male side of the connected roof sandwich panel On, make the support platform 22 that forms on another piece of roof sandwich panel lower panel 2 female sides stretch to the locking nail platform 21 underside of the roof sandwich panel that has been connected, unconnected by the locking nail platform 21 of the connected roof sandwich panel The supporting platform 22 of the roof sandwich panel is pressed on the purlin, so that the unconnected roof sandwich panel can be pressed on the purlin by the connected roof sandwich panel, and the female side of the unconnected roof sandwich panel 1 is connected to the connected roof sandwich panel simultaneously. On the prefabricated fastener 3 of the connected roof sandwich panel, the connection between the male side and the female side of two adjacent roof sandwich panels is completed, and then the male side of the unconnected roof sandwich panel is connected through the fastener and the prefabricated fastener 3 To the purlins, the roof sandwich panels can be connected together in turn and fixedly connected to the purlins of the roof.

In step 6) when the roof sandwich panel is installed, all the roof sandwich panels can be further connected to the purlins of the roof through the reinforcement rib 11 of the upper panel 1, the fire-resistant insulation layer 4 and the lower panel 2, and finally the cap 6 is fastened to the reinforcing rib 11, and the upper end of the reinforcing rib 11 is connected with the fastener and sealed together.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be regarded as within the scope described in this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a roof sandwich panel, the two ends of the sandwich panel are respectively a public side and a female side, and the roof sandwich panel includes an upper board, a filling layer and a lower board arranged successively, it is characterized in that: the male side of the lower board The side is formed into a locking nail platform, and the locking nail platform extends outward beyond the male side of the upper plate, and the locking nail platform is a closed tubular profile surrounded by the lower plate plane, the locking nail surface, the supporting feet and the male and female mating surfaces, The locking nail platform is fixedly connected to the purlin through the lower end of the fastener, and the locking nail platform is also connected to the public side of the upper plate through the fastener and the prefabricated fastener, that is, the upper plate, The lower plate and the purlins are connected as a whole, and the female side of the lower plate is formed into a supporting platform, and the supporting platform extends to the underside of the locking nail platform of another roof sandwich panel, and the supporting platform is pressed to the purlins through the locking nail platform Above, the female side of the upper panel is connected to the prefabricated fasteners connected to the locking nail platform of another roof sandwich panel, and the filling layer includes a fire-resistant insulation layer in the middle of the upper panel and the lower panel and polyurethane on both sides. Foam edge-sealing layer, and several pre-holes that allow liquid polyurethane to enter the nail-locking platform to close the tubular profile are provided on the nail-locking surface or supporting feet of the nail-locking platform, and several protruding reinforcing ribs are formed on the upper plate, so The roof sandwich panel passes through the reinforcing rib, the refractory insulation layer and the lower plate to connect the purlin through the fastener, and the reinforcing rib is connected with a cap. 2. The roof sandwich panel as claimed in claim 1, characterized in that: the support feet are vertically supported to the lower panel. 3. The roof sandwich panel according to claim 2, characterized in that: the lower ends of the supporting feet can be bent to form horizontal supporting feet. 4 . The roof sandwich panel according to claim 2 , wherein the supporting feet are located on the outer side of the upper panel, and the pre-holes are opened on the supporting feet of the locking nail platform. 5 . The roof sandwich panel according to claim 2 , wherein the supporting feet are located within the common side of the upper plate, and the pre-holes are respectively set on the supporting feet of the locking nail platform and the locking nail surface. 6 . 6. The roof sandwich panel according to claim 5, characterized in that: said pre-holes are opened on the supporting feet of the locking nail platform and the locking nail surface. 7. The roof sandwich panel according to claim 1, characterized in that: shoulders are provided on both sides of the reinforcing rib, and the reinforcing rib is connected to the cap through the shoulders on both sides. 8. The roof sandwich panel as claimed in claim 7, characterized in that: expansion notches are arranged on both sides of the cap in conjunction with the shoulders of the reinforcing ribs, and a seal is provided between both sides of the cap and the reinforcing ribs. strip. 9. A method for processing and installing a roof sandwich panel, comprising the following steps: 1) Unwinding: The plates for processing the upper plate and the lower plate are respectively uncoiled through the uncoiler; 2) Lower plate punching: pre-punching pre-holes on the corresponding position of the lower plate by means of roller punching or plane punching; 3) Forming: the upper plate is formed by a forming machine, and several reinforcing ribs are formed in the middle of the upper plate; the lower plate is formed into a locking nail platform and a supporting platform at both ends by a forming machine; 4) Filling layer filling: Spray adhesive on the lower side of the upper plate and the upper side of the lower plate, and glue and fill the refractory insulation material between the upper plate and the lower plate, and inject polyurethane material into the positions on both sides of the refractory insulation material , the initial state of the polyurethane foam material is liquid, and the liquid polyurethane foam material will enter the closed tubular profile of the locking nail platform through the pre-hole; 5) The roof sandwich panel is formed; after the filling layer is filled, it enters the crawler machine, and the product is pressed in the track machine, so that the refractory insulation material is formed into a fire-resistant insulation layer, and at the same time, the product is heated in the crawler machine to foam the polyurethane foam material to form polyurethane foam The edge banding layer seals the male and female sides of the roof sandwich panel. At the same time, the polyurethane foam material will also fill the inside of the closed tubular profile of the locking nail platform, and finally cut it into a roof sandwich panel of suitable size according to the length requirement; 6) Roof sandwich panel installation: Connect the prefabricated fasteners to the locking nail platform through fasteners, and the prefabricated fasteners are hooked to the public side of the upper plate, that is, the locking nail platform of the lower plate is connected to the upper plate through the prefabricated fasteners. The public side of the board is connected, and the lower end of the fastener also fixes the lower board to the purlin, and then the female side of another roof sandwich board is inserted into the male side of the connected roof sandwich board, so that the other roof sandwich board is lowered. The support platform formed on the mother side of the slab extends to the underside of the locking nail platform of the connected roof sandwich panel, and the support platform of the unconnected roof sandwich panel is pressed against the purlin through the locking nail platform of the connected roof sandwich panel, that is The unconnected roof sandwich panels can be pressed on the purlins through the connected roof sandwich panels, while the female sides of the unconnected roof sandwich panels are connected to the prefabricated fasteners of the connected roof sandwich panels, that is, the adjacent The connection between the male side and the female side of two roof sandwich panels, and then connect the public side of the unconnected roof sandwich panels to the purlins through fasteners and prefabricated fasteners, so that the roof sandwich panels can be connected together in turn, and with The purlins of the roof are fixedly connected. 10. roof sandwich panel processing installation method as claimed in claim 9, is characterized in that: when step 6) roof sandwich panel is installed, can also pass through the reinforcing rib of upper plate, fire-resistant insulation layer and lower plate by fastener All the roof sandwich panels are further connected to the purlins of the roof, and finally the caps are fastened to the reinforcing ribs, and the upper ends of the reinforcing ribs are connected with the fasteners to seal together.