CN110541526B - A photovoltaic waterproof system for low slope roofing - Google Patents
A photovoltaic waterproof system for low slope roofing Download PDFInfo
- Publication number
- CN110541526B CN110541526B CN201910834374.6A CN201910834374A CN110541526B CN 110541526 B CN110541526 B CN 110541526B CN 201910834374 A CN201910834374 A CN 201910834374A CN 110541526 B CN110541526 B CN 110541526B
- Authority
- CN
- China
- Prior art keywords
- plunger
- umbrella
- umbrella blade
- blade
- sealing strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 241000893568 Diphylleia cymosa Species 0.000 claims abstract description 20
- 238000004078 waterproofing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 31
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 4
- 230000000694 effects Effects 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/20—Supporting structures directly fixed to an immovable object
- H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
- H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
A photovoltaic waterproof system for low slope roofing, including: the support structure is formed by a plurality of sectional materials, and the sectional materials comprise a sectional material body and a clamping hook on the sectional material body; the sealing strip is arranged between the two profile bodies; the sealing strip comprises a plunger and a first umbrella blade, the first umbrella blade is in abutting joint with the two profile bodies, a second umbrella blade with a V-shaped structure is further arranged on the plunger, the edge of the second umbrella blade is in abutting joint with the profile bodies, and a first diversion trench is formed among the plunger, the second umbrella blade and the profile bodies; the guide strip is arranged at the end part of the sealing strip. When rainwater is permeated, as the second umbrella leaf is abutted with the profile bodies, the water permeated into the two profile bodies flows into the guide strips through the guide of the first guide grooves, the first guide grooves formed by the sealing strips are more convenient to implement, and the construction amount of laying the support structure is reduced; the water flowing out of the sealing strip can be gathered together by the guide strip arranged at the end part of the sealing strip, and the water is guided to be discharged out of the roof.
Description
Technical Field
The invention relates to the field of photovoltaic systems, in particular to a photovoltaic waterproof system for a low-gradient roof.
Background
With the technological change, the photovoltaic system can be directly used as a building material to serve as a roof, so that the overall cost can be reduced. However, the problem to be solved is how to make the photovoltaic module really become a part of building materials, so as to meet the requirement of building waterproof performance.
Chinese patent document No. CN201811211834.1 discloses a transverse waterproof structure for a photovoltaic waterproof system, comprising: two profiles arranged oppositely, wherein the profiles are used for supporting the laminated piece of the photovoltaic waterproof system; waterproof adhesive tape, joint has waterproof adhesive tape on every section bar, and waterproof adhesive tape includes: a rubber strip body with a U-shaped section; the waterproof piece, the cross-section of waterproof piece is "protruding" font, and waterproof piece includes: waterproof sealing portion and set up in the waterproof joint portion of waterproof sealing portion both sides, waterproof joint portion is used for sec-income adhesive tape body's U-shaped inslot portion rather than joint, and waterproof sealing portion is used for sealing between two sections of relative setting.
Among the above-mentioned technical scheme, horizontal waterproof between subassembly and the subassembly, waterproof adhesive tape and waterproof piece interact, and the system plane of effective guarantee integral erection under the realization waterproof function prerequisite is pleasing to the eye, but in the in-service use, especially in low slope roofing implementation, because the slope of roofing is lower, rainwater etc. drainage on the roofing is slower, can produce ponding on the roofing, waterproof adhesive tape can take place the seepage in ponding soaking, leads to the roofing to leak, and prior art exists the improvement.
Disclosure of Invention
In order to solve the technical problems, the invention provides a photovoltaic waterproof system for a low-gradient roof, and a diversion trench for water accumulation outflow is formed between a sealing strip and a profile body, so that water leakage caused by leakage of the roof is avoided.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a photovoltaic waterproof system for low slope roofing, including:
The support structure is formed by a plurality of section bar frameworks, the section bar comprises a section bar body and a clamping hook arranged on the section bar body, and the clamping hook is used for fixing the laminated sheet;
The sealing strips are arranged between two parallel and adjacent profile bodies; the sealing strip comprises a plunger and a first umbrella blade positioned at the end part of the plunger, wherein the first umbrella blade is in abutting joint with two parallel and adjacent profile bodies, one side of the plunger, which is far away from the first umbrella blade, is provided with a second umbrella blade with a V-shaped structure, and the edge of the second umbrella blade is in abutting joint with the profile bodies and forms a first diversion trench among the plunger, the second umbrella blade and the profile bodies;
The guide strip is arranged at the end part of the sealing strip.
By adopting the technical scheme, the clamping hooks arranged on the profile bodies can fix the lamination sheets on the roof, the first umbrella blades arranged between two adjacent profile bodies can prevent rainwater from penetrating into the supporting structure, and due to the fact that low-gradient roof rainwater flows slowly, accumulated water can exist on the roof, when rainwater penetrates into the sealing strip, the second umbrella blades are abutted with the profile bodies to form first diversion grooves between the plunger, the second umbrella blades and the profile bodies, water penetrating into the two profile bodies flows into the diversion strips through the guidance of the first diversion grooves, the first diversion grooves play a role of the diversion strips arranged between the two adjacent profile bodies, the first diversion grooves formed by the sealing strip are more convenient to implement, and the construction quantity of the supporting structure is reduced; the water flowing out of the sealing strip can be gathered together by the guide strip arranged at the end part of the sealing strip, and the water is guided to be discharged out of the roof.
The invention is further provided with: the profile body is further extended with a first flash which is reversely arranged on one side of the clamping hook, the first flash is of an L-shaped structure and comprises a horizontal plane and a vertical plane which reversely extend towards one side of the clamping hook, the first umbrella leaf is covered on the horizontal plane, and the edge of the second umbrella leaf is abutted to the vertical plane.
Through adopting above-mentioned technical scheme, first overlap has reduced the interval between two section bar bodies, reduces the width of sealing strip, improves the sealed effect of sealing strip.
The invention is further provided with: the plunger is kept away from the one end of first umbrella leaf is provided with the third umbrella leaf, the edge butt of vertical face in the third umbrella leaf, the third umbrella leaf vertical face the second umbrella leaf reaches form the second guiding gutter between the plunger.
Through adopting above-mentioned technical scheme, second umbrella leaf and section bar body butt still have water to take place the seepage along the section bar body, and the edge and the third umbrella leaf butt of vertical face make along in the water of section bar body surface seepage gets into the second guiding gutter, prevent that the water of seepage from passing bearing structure and leading to the roofing to leak.
The invention is further provided with: the plunger is provided with a central channel which is arranged along the length direction of the plunger, and the plunger is provided with a through hole which is communicated with the first diversion trench and/or the second diversion trench.
Through adopting above-mentioned technical scheme, increase the flow of first guiding gutter, second guiding gutter, improve the water guiding effect of sealing strip.
The invention is further provided with: the central channel comprises the following components which are sequentially and independently arranged from bottom to top: the first umbrella blade is provided with a diversion hole connected with the first channel; the second channel is communicated with the first diversion trench; and the third channel is communicated with the second diversion trench.
Through adopting above-mentioned technical scheme, the first passageway, second passageway, the third passageway that independently set up can guide rivers flow direction water conservancy diversion strip respectively, avoid water to gather in the second guiding gutter, prevent that excessive and the emergence seepage of moisture in the second guiding gutter from taking place.
The invention is further provided with: the profile body is provided with second flashes, the second flashes are parallel to the first flashes and are oppositely arranged on two sides of the profile body, the second flashes are provided with fixing blocks for connecting two adjacent second flashes, and the fixing blocks are fixedly connected with the two adjacent second flashes respectively.
Through adopting above-mentioned technical scheme, the section bar body passes through the fixed block to be fixed, makes things convenient for the section bar body fixed when laying bearing structure, and the fixed block on the second flies the edge can guarantee the interval between two section bar bodies, avoids taking place the roofing because the interval is too big between two section bar bodies to leak.
The invention is further provided with: and anti-slip grooves are formed in the second flash at intervals along the cross section direction of the profile body, and anti-slip protrusions are arranged on the fixing blocks corresponding to the anti-slip grooves.
Through adopting above-mentioned technical scheme, the interval between two section bar bodies can be injectd through inlay card cooperation with the anti-skidding groove on the second flies to the anti-skidding arch on the fixed block, makes things convenient for bearing structure's laying and makes things convenient for later stage dismantlement maintenance.
The invention is further provided with: the guide strips are arranged on the fixed blocks.
By adopting the technical scheme, the fixing of the guide strips is facilitated, and the construction work of the photovoltaic waterproof system is simplified.
The invention is further provided with: the guide strip comprises a horizontal guide groove paved in the horizontal direction and a longitudinal guide groove paved in an inclined mode, U-shaped hooks are arranged at two ends of the horizontal guide groove, and the hooks are clamped in the horizontal guide groove.
Through adopting above-mentioned technical scheme, the crotch of U font can guarantee on the one hand that the hydroenergy in the horizontal guiding gutter gathers in vertical guiding gutter, and on the other hand can block vertical guiding gutter, makes the guide strip on the bearing structure whole compacter.
In summary, the invention has the following technical effects:
1. The sealing strip not only can seal the gap between the two profile bodies, but also can guide water leakage so as to dredge and replace plugs and improve the waterproof effect of the photovoltaic waterproof system;
2. The second umbrella blade and the third umbrella blade of the sealing strip can effectively guide the permeated water flow into the water guide groove, so that rainwater is prevented from permeating into the roof; meanwhile, the umbrella-shaped sealing strip is easier to plug into the gap, but is not easy to pull out, so that the sealing strip can be ensured not to generate abnormal displacement and the like in the use process;
3. The central channel can increase the guiding flow of the sealing strip, and can still keep the guiding effect when the seepage water flows more;
4. The first channel, the second channel and the third channel which are mutually independent can ensure that the seepage water smoothly flows in the sealing strip, and water accumulation in the sealing strip is avoided;
5. The U-shaped hook can ensure that water in the transverse water guide groove can be converged in the longitudinal water guide groove on one hand, and can clamp the longitudinal water guide groove on the other hand, so that the whole water guide strip on the supporting structure is more compact.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of the overall structure of a photovoltaic waterproofing system;
fig. 2 is a schematic cross-sectional view of a photovoltaic waterproofing system;
Fig. 3 is a schematic end-face structure of the profile body;
FIG. 4 is a schematic view of the overall structure of the sealing strip;
FIG. 5 is a schematic cross-sectional view of a seal strip;
fig. 6 is a schematic diagram of the overall structure of the guide strip.
In the figure: 1. a support structure; 11. a profile body; 12. a hook; 13. a first flash; 14. a second flash; 2. a sealing strip; 21. a plunger; 22. a first umbrella leaf; 23. a second umbrella leaf; 24. a third umbrella leaf; 25. a central passage; 3. a flow guiding strip; 31. a transverse water guide groove; 311. a hook; 32. a longitudinal water guide groove; 4. a first diversion trench; 5. a second diversion trench; 6. a fixed block; 7. a deflector aperture; 8. and a through hole.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a photovoltaic waterproof system for a low-gradient roof includes: the support structure is formed by a plurality of section structures, and the section comprises a section body and a clamping hook arranged on the section body, wherein the clamping hook is used for fixing a lamination sheet in the photovoltaic system; the profile body is also extended with a first flash which is reversely arranged at one side of the clamping hook, and the first flash is in an L-shaped structure and comprises a horizontal plane and a vertical plane which are reversely extended towards one side of the clamping hook.
The sealing strip is arranged between two parallel and adjacent profile bodies; the sealing strip comprises a plunger and a first umbrella blade positioned at the end part of the plunger, the first umbrella blade is in abutting joint with two parallel and adjacent profile bodies, the first umbrella blade covers on a horizontal plane, one side of the plunger, which is far away from the first umbrella blade, is provided with a second umbrella blade with a V-shaped structure, the edge of the second umbrella blade is in abutting joint with a vertical surface, and a first diversion trench is formed among the plunger, the second umbrella blade and the profile bodies; the plunger is provided with the third umbrella leaf far away from the one end of first umbrella leaf, and the edge butt of vertical face forms the second guiding gutter in third umbrella leaf, vertical face, second umbrella leaf and plunger between.
The guide strip is arranged at the end part of the sealing strip.
The photovoltaic waterproof system prevents rainwater from directly flowing into the supporting structure through the first umbrella leaf, and guides water flow penetrating into the supporting structure through the sealing strip with the first diversion trench and the second diversion trench, so that the water flow is prevented from further penetrating into the roof, and the waterproof effect of the low-gradient roof is greatly improved.
In order to further improve the flow guiding effect of the sealing strip, the plunger is provided with a central channel which is arranged along the length direction of the plunger, and the plunger is provided with a through hole which is communicated with the first flow guiding groove and/or the second flow guiding groove. In order to avoid rainwater to accumulate in the second guiding gutter, the central passage is including the independent setting in proper order from bottom to top: the first passage is provided with a diversion hole connected with the first passage; the second channel is communicated with the first diversion trench; and the third channel is communicated with the second diversion trench.
In order to facilitate the fixing of the section bar body, the section bar body is provided with second flash edges which are parallel to the first flash edges and are oppositely arranged at two sides of the section bar body, the second flash edges are provided with fixing blocks for connecting two adjacent second flash edges, the fixing blocks are respectively fixedly connected with the two adjacent second flash edges, and the guide strips are arranged on the fixing blocks.
In order to facilitate the fixation of the fixing block and the second flash, anti-slip grooves are formed in the second flash at intervals along the cross section direction of the profile body, and anti-slip protrusions are arranged on the fixing block corresponding to the anti-slip grooves.
In this scheme, the water conservancy diversion strip is including the horizontal guiding gutter that the horizontal direction was laid and the vertical guiding gutter that the slope was laid, and the both ends of horizontal guiding gutter are provided with the crotch of U font, crotch joint in horizontal guiding gutter.
It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (6)
1. A photovoltaic waterproof system for low slope roofing, characterized by including:
The support structure is formed by a plurality of section bar frameworks, the section bar comprises a section bar body and a clamping hook arranged on the section bar body, and the clamping hook is used for fixing the laminated sheet;
The sealing strips are arranged between two parallel and adjacent profile bodies; the sealing strip comprises a plunger and a first umbrella blade positioned at the end part of the plunger, wherein the first umbrella blade is in abutting joint with two parallel and adjacent profile bodies, one side of the plunger, which is far away from the first umbrella blade, is provided with a second umbrella blade with a V-shaped structure, and the edge of the second umbrella blade is in abutting joint with the profile bodies and forms a first diversion trench among the plunger, the second umbrella blade and the profile bodies;
the guide strip is arranged at the end part of the sealing strip;
The profile body is also extended with a first flash which is reversely arranged at one side of the clamping hook, the first flash is of an L-shaped structure and comprises a horizontal plane and a vertical surface which reversely extend towards one side of the clamping hook, the first umbrella leaf is covered on the horizontal plane, and the edge of the second umbrella leaf is abutted with the vertical surface;
a third umbrella blade is arranged at one end of the plunger, which is far away from the first umbrella blade, the edge of the vertical surface is abutted against the third umbrella blade, and a second diversion trench is formed among the third umbrella blade, the vertical surface, the second umbrella blade and the plunger;
The profile body is provided with second flashes, the second flashes are parallel to the first flashes and are oppositely arranged on two sides of the profile body, the second flashes are provided with fixing blocks for connecting two adjacent second flashes, and the fixing blocks are fixedly connected with the two adjacent second flashes respectively.
2. The photovoltaic waterproof system for the low-gradient roof according to claim 1, wherein the plunger is provided with a central channel which is opened along the length direction of the plunger, and the plunger is provided with a through hole which is communicated with the first diversion trench and/or the second diversion trench.
3. The photovoltaic waterproof system for low-grade roofs according to claim 2, wherein the central channel comprises the following components: the first umbrella blade is provided with a diversion hole connected with the first channel; the second channel is communicated with the first diversion trench; and the third channel is communicated with the second diversion trench.
4. The photovoltaic waterproof system for the low-gradient roof according to claim 1, wherein anti-slip grooves are formed in the second flash at intervals along the cross section direction of the profile body, and anti-slip protrusions are arranged on the fixing blocks corresponding to the anti-slip grooves.
5. A photovoltaic waterproofing system for low grade roofing according to claim 1 wherein the deflector strips are disposed on the fixed blocks.
6. The photovoltaic waterproof system for the low-gradient roof according to claim 5, wherein the guide strip comprises a horizontal guide groove paved in a horizontal direction and a longitudinal guide groove paved in an inclined mode, two ends of the horizontal guide groove are provided with U-shaped hooks, and the hooks are clamped in the horizontal guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834374.6A CN110541526B (en) | 2019-09-04 | 2019-09-04 | A photovoltaic waterproof system for low slope roofing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834374.6A CN110541526B (en) | 2019-09-04 | 2019-09-04 | A photovoltaic waterproof system for low slope roofing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110541526A CN110541526A (en) | 2019-12-06 |
| CN110541526B true CN110541526B (en) | 2024-04-19 |
Family
ID=68712507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910834374.6A Active CN110541526B (en) | 2019-09-04 | 2019-09-04 | A photovoltaic waterproof system for low slope roofing |
Country Status (1)
| Country | Link |
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| CN (1) | CN110541526B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064900B (en) * | 2020-08-31 | 2021-08-31 | 华清八度光电集团有限公司 | Building roof for solar photovoltaic power generation convenient to sealed drainage |
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|---|---|---|---|---|
| EP2117051A2 (en) * | 2008-05-05 | 2009-11-11 | Dieter Röttger | Rear-ventilated device for fixing photovoltaic modules to the roof construction |
| CN108560839A (en) * | 2018-06-04 | 2018-09-21 | 浙江宝利特新能源股份有限公司 | A kind of integrated photovoltaic system of roof building |
| CN109274322A (en) * | 2018-10-17 | 2019-01-25 | 浙江宝利特新能源股份有限公司 | A kind of lateral waterproof construction for photovoltaic waterproof system |
| CN109972796A (en) * | 2019-03-18 | 2019-07-05 | 浙江宝利特新能源股份有限公司 | It is a kind of to use the low gradient roofing water repellent component of industry and commerce |
| CN209179335U (en) * | 2018-10-17 | 2019-07-30 | 浙江宝利特新能源股份有限公司 | One kind being used for photovoltaic waterproof system profile |
| CN211286316U (en) * | 2019-09-04 | 2020-08-18 | 浙江宝利特新能源股份有限公司 | Photovoltaic waterproof system for low-gradient roof |
-
2019
- 2019-09-04 CN CN201910834374.6A patent/CN110541526B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2117051A2 (en) * | 2008-05-05 | 2009-11-11 | Dieter Röttger | Rear-ventilated device for fixing photovoltaic modules to the roof construction |
| CN108560839A (en) * | 2018-06-04 | 2018-09-21 | 浙江宝利特新能源股份有限公司 | A kind of integrated photovoltaic system of roof building |
| CN109274322A (en) * | 2018-10-17 | 2019-01-25 | 浙江宝利特新能源股份有限公司 | A kind of lateral waterproof construction for photovoltaic waterproof system |
| CN209179335U (en) * | 2018-10-17 | 2019-07-30 | 浙江宝利特新能源股份有限公司 | One kind being used for photovoltaic waterproof system profile |
| CN109972796A (en) * | 2019-03-18 | 2019-07-05 | 浙江宝利特新能源股份有限公司 | It is a kind of to use the low gradient roofing water repellent component of industry and commerce |
| CN211286316U (en) * | 2019-09-04 | 2020-08-18 | 浙江宝利特新能源股份有限公司 | Photovoltaic waterproof system for low-gradient roof |
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| Publication number | Publication date |
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| CN110541526A (en) | 2019-12-06 |
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