Waterproof structure based on building photovoltaic integrated system

Abstract

The invention relates to the field of photovoltaic technology, in particular to a waterproof structure based on a building photovoltaic integrated system, which comprises photovoltaic modules, a photovoltaic connecting mechanism used for connecting the photovoltaic modules and a support frame used for supporting the photovoltaic connecting mechanism, and is characterized in that the photovoltaic connecting mechanism comprises an upper pressing plate, a lower pressing plate and a connecting piece connected between the two pressing plates; two independent inserting grooves are defined by the two side walls of the connecting piece, the upper pressing plate and the lower pressing plate respectively, the photovoltaic assemblies are connected into the inserting grooves, sealant is arranged at the joints between the photovoltaic assemblies and the inserting grooves, a drainage through groove is formed in the inner bottom face of one inserting groove in the axial direction of the photovoltaic connecting mechanism, and a water outlet is formed in the drainage through groove. By implementing the scheme, the daily waterproof function is achieved, and the effect of continuous waterproof can be achieved when the daily waterproof function is abnormal.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaics, and in particular to a waterproof structure based on a building photovoltaic integrated system. Background Art

[0002] Building-integrated photovoltaics (BIPV) integrates photovoltaic modules into buildings, combining the advantages of architectural aesthetics and green energy to achieve the goal of integrating photovoltaic power generation with building functions. By combining photovoltaic power generation technology with building materials, design, and construction, BIPV systems achieve efficient integration of architecture and energy, achieving the goals of energy conservation, emission reduction, and green development. Therefore, BIPV systems are widely used in distributed photovoltaic projects.

[0003] In the practical application of BIPV systems, waterproofing has always been a key issue requiring special attention. It is crucial for ensuring the long-term stable operation of distributed photovoltaic systems and is directly related to the safety and service life of buildings. Improper waterproofing measures can not only damage photovoltaic modules but also cause flooding and damage to the interior of the building, resulting in serious economic losses and safety hazards.

[0004] Water leaks primarily occur at the joints between PV panels and connecting components. Since PV panels are installed at an angle, this is particularly prevalent at the connections between the horizontal connecting components and the PV panels. If there are gaps or other connection problems between the horizontal connecting components and the PV panels as water flows downward, this can directly lead to water leaks within the building. Therefore, waterproofing between the horizontal connecting components and the PV panels is particularly important. Summary of the Invention

[0005] The present invention aims to provide a waterproof structure based on a building photovoltaic integrated system, so as to achieve daily waterproof function and maintain a continuous waterproof effect when the daily waterproof function is abnormal.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a waterproof structure based on a building photovoltaic integrated system, comprising photovoltaic modules, a photovoltaic connection mechanism for connecting the photovoltaic modules and a support frame for supporting the photovoltaic connection mechanism, the photovoltaic connection mechanism comprising an upper pressure plate, a lower pressure plate and a connector connected between the two pressure plates, the two side walls of the connector respectively enclose two independent slots with the upper pressure plate and the lower pressure plate, the photovoltaic modules are connected in the slots, and sealant is provided at the joint between the two, the inner bottom surface of one of the slots is provided with a drainage groove along the axial direction of the photovoltaic connection mechanism, and a water outlet is provided on the drainage groove.

[0007] Preferably, as an improvement, the upper pressing plate is detachably connected to the connecting piece.

[0008] Preferably, as an improvement, a groove is provided on the upper end surface of the connecting piece along its axial direction, and a sliding groove and a card groove are respectively provided on the side surfaces of the groove, and the card groove is located below the sliding groove, and a sliding block is provided on the lower surface of the upper pressure plate, and a card protrusion for engaging with the card groove is provided on the side surface of the sliding block.

[0009] Preferably, as an improvement, the distance between the clamping protrusion and the upper pressing plate is consistent with the distance between the clamping groove and the upper surface of the connecting piece.

[0010] Preferably, as an improvement, the outer contour of the clamping protrusion is arc-shaped, and the position of the connecting piece between the clamping groove and the sliding groove is a chamfered structure.

[0011] Preferably, as an improvement, a positioning groove is provided on the upper surface of the connecting member, a positioning block corresponding to the positioning groove is provided on the lower surface of the upper pressing plate, and the upper pressing plate and the connecting member are connected by screws.

[0012] Preferably, as an improvement, the support frame includes a horizontal beam, a longitudinal beam and a support column connected in sequence from top to bottom, the interior of the support column is a hollow structure, and a drainage pipe leading to the building drainage system is provided in the support column.

[0013] Preferably, as an improvement, the width of the drainage groove is 1 cm-1.5 cm, and the depth is 0.8 cm-1.5 cm.

[0014] Preferably, as an improvement, the upper surface of the upper pressing plate is a wedge surface, and the wedge surface forms a triangular structure with the lower surface of the upper pressing plate.

[0015] The advantages of this solution are:

[0016] 1. Multiple waterproofing effects: including daily waterproofing and post-production waterproofing. For daily waterproofing, this solution achieves daily waterproofing by combining two pressure plates and connectors to form slots for pressing and tightly fitting the photovoltaic modules, reducing the gap between the modules and the modules. Sealant is then applied to the joints between the modules and the two pressure plates to achieve this. Furthermore, to achieve even better daily waterproofing, the upper surface of the upper pressure plate is designed as a wedge surface. This wedge surface forms a triangular structure with the lower surface of the upper pressure plate, facilitating the smooth and rapid transition of rainwater and clean water from the photovoltaic modules to the upper pressure plate and continuing downward, avoiding prolonged sedimentation there.

[0017] Post-stage waterproofing refers to the long-term prevention of internal building leaks if the building's waterproofing fails during long-term use (e.g., sealant failure or hardening of the adhesive, resulting in local cracking). Specifically, if sealant failure causes cracks to form between the PV modules and the upper platen, rainwater will flow through the cracks along the contact surface into the drainage troughs, where it will be collected and discharged to the outside of the building through the outlet.

[0018] 2. Through the ingenious design of the photovoltaic connection mechanism, it can not only ensure the tightness of the connection between it and the photovoltaic module to achieve a better waterproof effect, but also reduce the difficulty of installing the photovoltaic module and improve the installation efficiency. At the same time, it can effectively avoid the problem of scratching the photovoltaic module during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0020] Figure 2 A cross-sectional view of a photovoltaic module installed in a photovoltaic connection mechanism.

[0021] Figure 3 for Figure 2 A partial enlarged view of middle A.

[0022] Figure 4 Schematic diagram of the structure of the photovoltaic connection mechanism.

[0023] Figure 5 This is a diagram of the state where the upper pressure plate and the connecting piece are connected by screws.

[0024] Figure 6 This is another state diagram in which the upper pressure plate and the connecting piece are connected by screws.

[0025] The figure marks in the drawings of the specification include: photovoltaic component 1, upper pressure plate 2, sliding block 21, locking protrusion 22, lower pressure plate 3, connecting part 4, groove 41, locking slot 42, slide 43, slot 5, drainage groove 6, branch water outlet 7, drainage pipe 8, cross beam 9, longitudinal beam 10, support column 11, screw 12. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The embodiment is basically as shown in the attached Figures 1-6As shown: A waterproof structure based on a building photovoltaic integrated system includes a photovoltaic module 1, a photovoltaic connection mechanism for connecting each photovoltaic module 1, and a support frame for supporting the photovoltaic connection mechanism. The photovoltaic connection mechanism includes an upper pressure plate 2, a lower pressure plate 3, and a connector 4 connected between the two pressure plates. The left and right side walls of the connector 4 are respectively surrounded by the upper pressure plate 2 and the lower pressure plate 3 to form two independent slots 5. The end of the photovoltaic module 1 is inserted into the slot 5. The joint between the photovoltaic module 1 and the pressure plate is coated with a sealant (silicone glue is used in this embodiment) to achieve a waterproof effect. The upper pressure plate 2 has a structure that is thick in the middle and thin on both sides. The upper surface on the left side is a wedge surface structure. The wedge surface and the lower surface of the upper pressure plate form a triangular structure. This is conducive to the smooth transition of rainwater and clean water from the photovoltaic module 1 to the upper pressure plate 2 and continue to flow downward, while preventing dust, impurities, etc. from being deposited there and affecting the power generation efficiency.

[0028] A drainage groove 6 is provided on the inner bottom surface of a slot 5 located on the left side along the axial direction of the lower pressure plate 3. Because the drainage groove 6 plays its final waterproof role when there is a problem with the connection between the photovoltaic connection mechanism and the photovoltaic module 1 during long-term use, and the connection problems between the photovoltaic connection mechanism and the photovoltaic module 1 are mostly local and small-point connections. Therefore, the amount of water leakage is relatively small. Therefore, the width of the drainage groove 6 is 1cm-1.5cm and the depth is 0.8cm-1.5cm. A water outlet is provided on the drainage groove 6, and the water outlet can be set on the end face of the lower pressure plate 3 to discharge water directly through the end face of the lower pressure plate 3. In order to prevent insects, leaves, etc. from entering the drainage groove 6 and causing blockage, a protective net is provided at the water outlet.

[0029] In addition, if Figure 1 As shown, multiple branch water outlets 7 can also be provided along the length direction of the lower pressure plate 3. Each branch water outlet 7 is connected to the support frame, and the water is discharged into the drainage system within the building through the support frame. Specifically, the support frame includes a crossbeam 9, a longitudinal beam 10, and a support column 11 connected in sequence from top to bottom (this is the prior art). The interior of the support column 11 is a hollow structure, and a drainage pipe 8 is provided inside the support column 11. One end of the drainage pipe 8 is connected to the branch water outlet 7 through a joint, and the other end is connected to the drainage system within the channel building, thereby uniformly discharging the water.

[0030] During actual installation, the photovoltaic connection mechanism is mainly used to connect the upper and lower photovoltaic modules 1. Therefore, the photovoltaic connection mechanism is horizontally installed on the support frame, and a slot 5 with a drainage groove 6 is provided facing the photovoltaic module 1 above. During long-term use, if there is a problem with the connection between the photovoltaic connection mechanism and the photovoltaic module 1, resulting in water leakage, such as the sealant failing to adhere due to long-term exposure to the sun or the colloid hardening and local cracking, when it rains heavily, rainwater will enter the drainage groove 6 along the contact surface of the two from the cracks, be collected, and be discharged into the drainage system in the building through the branch outlet 7. In this way, on the one hand, if there is a leak between the lower pressure plate 3 and the photovoltaic module 1, rainwater is prevented from dripping directly from the lower pressure plate 3 into the room. On the other hand, if there is no problem with the connection between the lower pressure plate 3 and the photovoltaic module 1, at this time, rainwater will be deposited between the photovoltaic connection mechanism and the photovoltaic module 1 for a long time, which will accelerate the aging of the photovoltaic module 1.

[0031] During the installation process, in order to ensure the tightness of the connection between the two pressure plates and the photovoltaic module 1 to achieve a better waterproof effect, the distance between the two pressure plates is almost the same as the thickness of the photovoltaic module 1. Therefore, it is difficult to install the photovoltaic module 1 and it is easy to scratch the photovoltaic module 1. Therefore, to address this problem, this solution has made the following design for the photovoltaic connection mechanism:

[0032] One structure is: Figure 2-Figure 4 As shown, the upper end surface of the connector 4 is provided with a groove 41 extending axially therethrough. Two slide grooves 43 and two clamping grooves 42 are provided on either side of the groove 41. The clamping grooves 42 are located below the slide grooves 43. A sliding block 21 is fixedly mounted on the lower surface of the upper pressure plate 2. Both left and right sides of the sliding block 21 are provided with a latching protrusion 22 for engaging with the clamping grooves 42. The spacing between the latching protrusion 22 and the upper pressure plate 2 is consistent with the spacing between the clamping grooves 42 and the upper surface of the connector 4. Thus, when the clamping grooves 42 and the latching protrusion 22 engage, the lower surface of the upper pressure plate 2 and the upper surface of the connector 4 fully conform to each other, supporting each other. The outer contour of the latching protrusion 22 is arc-shaped, and the portion of the connector 4 between the clamping grooves 42 and the slide grooves 43 is rounded. This structural design allows the latching protrusion 22 to slide to its end point in the slide grooves 43 and then, by tapping the upper pressure plate 2, smoothly retract into the latching grooves 42. In order to facilitate the fast sliding of the locking protrusion 22 in the sliding groove 43 and improve construction efficiency, the size of the sliding groove 43 is larger than the size of the locking protrusion 22.

[0033] During actual installation, after installing the lower pressing plates 3 and connectors 4 of each row on the support frame, each photovoltaic module 1 is installed in the corresponding slot 5. After all photovoltaic modules 1 are laid out, the latching protrusion 22 of the upper pressing plate 2 is pushed along the chute 43 of the connector 4 from the end to the other end. Since the chute 43 is located above the latching protrusion 22, when the latching protrusion 22 slides in the chute 43, the upper pressing plate 2 will not contact the photovoltaic module 1, and thus will not cause scratches or wear to it. After the upper pressing plate 2 slides to the specified position, the latching protrusion 22 is moved from the chute 43 to the latching slot 42 by knocking on the upper pressing plate 2, thereby achieving a fixed connection between the upper pressing plate 2 and the connector 4, and tightly fixing the photovoltaic module 1 between the two pressing plates.

[0034] Another structure is: Figure 5 、 Figure 6 As shown, a positioning groove is provided on the upper surface of the connecting member 4, and a positioning block corresponding to the positioning groove is provided on the lower surface of the upper pressing plate 2. The thickness of the positioning block does not exceed the depth of the positioning groove. The upper pressing plate 2 and the connecting member 4 are connected by bolts or screws 12. During actual installation, after the upper pressing plate 2 is initially positioned with the positioning block, the positioning groove and the connecting member 4, the two are fastened together by bolts.

[0035] Compared with the first structure, the second structure is simpler, but the installation is more troublesome and takes longer, and requires connecting a large number of bolts or screws 12. The first structure only requires two steps: sliding the upper pressure plate 2 to the specified position and then knocking the upper pressure plate 2 to complete.

[0036] In addition, depending on the site environment or actual conditions, such as in areas with seasonal strong winds, the two structures can be combined, that is, on the basis of the first structure, several screws 12 can be installed on the upper pressure plate 2 and the connecting member 4 to improve the stability between the two.

[0037] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A waterproof structure based on a building photovoltaic integrated system, characterized by: It includes photovoltaic modules, photovoltaic connection mechanisms for connecting the photovoltaic modules and a support frame for supporting the photovoltaic connection mechanisms. The photovoltaic connection mechanisms include an upper pressure plate, a lower pressure plate and a connector connected between the two pressure plates. The two side walls of the connector respectively form two independent slots with the upper pressure plate and the lower pressure plate. The photovoltaic modules are connected in the slots, and sealant is provided at the joints between the two. A drainage groove is provided on the inner bottom surface of one of the slots along the axial direction of the photovoltaic connection mechanism, and a water outlet is provided on the drainage groove.

2. The waterproof structure based on the building photovoltaic integrated system according to claim 1, characterized in that: The upper pressing plate is detachably connected to the connecting piece.

3. The waterproof structure based on the building photovoltaic integrated system according to claim 2, characterized in that: The upper end surface of the connecting piece is provided with a groove running through it along its axial direction, and the sides of the groove are respectively provided with a sliding groove and a clamping groove, and the clamping groove is located below the sliding groove. The lower surface of the upper pressure plate is provided with a sliding block, and the side of the sliding block is provided with a clamping protrusion for engaging with the clamping groove.

4. The waterproof structure based on the building photovoltaic integrated system according to claim 3, characterized in that: The distance between the clamping protrusion and the upper pressing plate is consistent with the distance between the clamping groove and the upper surface of the connecting piece.

5. The waterproof structure based on building photovoltaic integrated system according to claim 4, characterized in that: The outer contour of the clamping protrusion is arc-shaped, and the position of the connecting piece between the clamping groove and the sliding groove is a chamfered structure.

6. The waterproof structure based on building photovoltaic integrated system according to claim 2, characterized in that: A positioning groove is provided on the upper surface of the connecting piece, and a positioning block corresponding to the positioning groove is provided on the lower surface of the upper pressing plate. The upper pressing plate and the connecting piece are connected by screws.

7. A waterproof structure based on a building photovoltaic integrated system according to claim 5 or 6, characterized in that: The support frame includes a horizontal beam, a longitudinal beam and a support column connected in sequence from top to bottom. The interior of the support column is a hollow structure, and a drainage pipe leading to the building drainage system is provided in the support column.

8. The waterproof structure based on building photovoltaic integrated system according to claim 7, characterized in that: The width of the drainage groove is 1 cm-1.5 cm, and the depth is 0.8 cm-1.5 cm.

9. The waterproof structure based on building photovoltaic integrated system according to claim 8, characterized in that: The upper surface of the upper pressing plate is a wedge surface, and the wedge surface and the lower surface of the upper pressing plate form a triangular structure.

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