CN219808595U - Novel steel construction roofing structure - Google Patents
Novel steel construction roofing structure Download PDFInfo
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- CN219808595U CN219808595U CN202320178675.XU CN202320178675U CN219808595U CN 219808595 U CN219808595 U CN 219808595U CN 202320178675 U CN202320178675 U CN 202320178675U CN 219808595 U CN219808595 U CN 219808595U
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- heat preservation
- heat
- roof
- waterproof
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims description 5
- 238000004321 preservation Methods 0.000 claims abstract description 57
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 123
- 238000009413 insulation Methods 0.000 claims description 39
- 229920000742 Cotton Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- -1 aluminum-magnesium-manganese Chemical compound 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000149 penetrating effect Effects 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229920002397 thermoplastic olefin Polymers 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010421 standard material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
The utility model discloses a novel steel structure roof structure, which belongs to the technical field of steel structure roof structures and is used for improving the waterproof, heat-preserving, heat-insulating, noise-reducing and wind-uncovering-resistant performances of the roof structure; the adjacent top plates are fixed through the wind-resistant clamps and are used for improving the wind uncovering resistance of the whole outer plate of the roof, the infrared heat-insulating reflecting film reflects heat generated on the top plates, and the heat-insulating performance of the roof is improved; two heat-insulating layers are arranged, and a gas-insulating layer, a waterproof breathable layer and a waterproof layer are respectively arranged on the heat-insulating layers and used for improving the heat preservation, noise reduction and waterproof effects of the roof.
Description
Technical Field
The utility model belongs to the technical field of roofs, and is used for improving the water resistance, heat preservation, heat insulation, noise reduction and wind uncovering resistance of a steel structure roof structure, in particular to a novel steel structure roof structure.
Background
The metal roof is in a roof form by adopting a metal plate as a roof material and combining a structural layer and a waterproof layer, the metal plate has a plurality of types, such as a galvanized sheet, an aluminized zinc sheet, an aluminum alloy sheet, an aluminum magnesium alloy sheet, a titanium alloy sheet, a copper plate, a stainless steel sheet and the like, the surface of the plate can be subjected to baking finish treatment, mainly PE/PE, SMP/PE, HDP\PE, PVDF\PE, and the like, the baking finish can strengthen the service life of the plate, and the service life is respectively 5-8 years, 10-15 years, 15-20 years and more than 20-25 years.
The existing factory building roof structure has the patent number (CN 208009770U), and the technical scheme comprises a main purline, a secondary purline perpendicular to the main purline, and a top plate fixed above the secondary purline, wherein the top plate comprises a supporting layer fixed on the secondary purline; the steam barrier layer is arranged on one side of the supporting layer, far away from the secondary purline; an insulation layer is arranged on one side of the steam barrier layer away from the supporting layer; a waterproof layer is arranged on one side of the heat preservation layer far away from the steam barrier layer; the heat insulation effect of the roof of the factory building can be improved, so that the working environment in the factory building is improved; in the practical use process, the roof structure of the factory building has the following defects: the supporting layer is arranged below the heat insulation layer, can only bear the pressure provided by a roof, cannot resist the tensile force caused by wind, and has the problem of poor wind uncovering resistance; the connection between the top plates is fixed through bolts, screw holes are formed in the top plates for bolt fixation, so that the structure of the top plates is damaged to a certain extent, water seepage is easy, and the overall service life of the roof is influenced; because the structure lacks a heat insulation reflecting device, the temperature on the top plate is focused for a long time, so that the problem of poor heat insulation performance exists; because the insulating layer on this structure has only set up one deck, thermal insulation performance is poor, and the noise reduction effect is not enough moreover.
In summary, the product provides a novel steel structure roof structure, solves the problems in the background art, and is used for improving the performances of water resistance, heat preservation, heat insulation, noise reduction and wind uncovering resistance of the roof structure.
Disclosure of Invention
The utility model aims to provide a novel steel structure roof structure to solve the problem of poor heat insulation, heat preservation, noise reduction and wind uncovering resistance effects in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a novel steel construction roofing structure, its characterized in that, including setting up many purlins on the girder steel, the steel wire net has been laid on the purlin, be provided with first heat preservation on the steel wire net, be provided with the supporting layer on the first heat preservation, be provided with the second heat preservation on the supporting layer, be provided with the thermal-insulated reflectance coating of infrared on the second heat preservation, be provided with the roof on the thermal-insulated reflectance coating of infrared, the roof that adjacent set up is through anti-wind clamp connection.
The upper surface and the lower surface of the first heat preservation layer are respectively provided with an air isolation layer and a waterproof and breathable layer, and the upper surface and the lower surface of the second heat preservation layer are respectively provided with a protection layer and an additional waterproof layer; the second heat preservation layer is internally provided with an additional purline, and the supporting layer is fixed with the purline and the additional purline through self-tapping nails.
An additional waterproof layer is further arranged between the infrared heat insulation reflecting film and the second heat preservation layer.
The additional purlines are provided with brackets, the upper ends of the brackets extend into the space between the adjacent top plates, and the wind-resistant clamps fix the top plates on the brackets.
The wind-resistant clamp comprises two oppositely arranged connecting plates, the upper ends of the two connecting plates are fixed through bolts, and the lower ends of the two connecting plates clamp the top plates and the brackets which are adjacently arranged.
The additional purlines are galvanized few parts, and rock wool is filled in the galvanized few parts.
The first heat preservation layer and the second heat preservation layer are respectively a heat-insulating glass fiber cotton felt and a hard rock cotton sound insulation noise reduction plate, wherein the heat-insulating glass fiber cotton felt is used for heat preservation, and the hard rock cotton sound insulation noise reduction plate is used for heat preservation and noise reduction.
The supporting layer adopts hot dip galvanized profiled sheet, hot dip galvanized profiled sheet upper and lower recess respectively with additional purlin and purlin fixed connection.
The air-isolating layer and the waterproof breathable layer are respectively an aluminum foil and a waterproof breathable film, and the additional waterproof layer is a waterproof coiled material.
The top plate is an aluminum-magnesium-manganese profiling metal plate, and a space is reserved between the infrared heat insulation reflecting film and the aluminum-magnesium-manganese profiling metal plate.
The purlines are galvanized rectangular pipes.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, the steel beams are provided with the purlines, the steel wire meshes are paved on the purlines, the first heat insulation layer, the supporting layer, the second heat insulation layer, the additional waterproof layer, the infrared heat insulation reflecting film and the top plate are sequentially arranged on the steel wire meshes, the adjacently arranged top plates are connected through the wind-resistant clamps, the supporting layer is positioned between the first heat insulation layer and the second heat insulation layer, and the tensile force of wind load is resisted while the pressure of the roof is born, so that the wind uncovering resistance of the roof is improved; the adjacent top plates are fixed through the wind-resistant clamp, so that the threaded holes are prevented from being formed in the top plates, rainwater is prevented from penetrating into the roof from the threaded holes, and the overall service life of the roof is prolonged; the infrared heat-insulating reflective film reflects heat on the top plate, so that the heat-insulating performance of the roof is improved; the two heat-insulating layers are arranged, and the air-insulating layer, the waterproof breathable layer and the additional waterproof layer are respectively arranged on the heat-insulating layers and are used for improving the heat preservation, heat insulation, noise reduction and waterproof effects of the roof.
Drawings
FIG. 1 is a schematic view of a roof construction of the present utility model;
FIG. 2 is a schematic view of the longitudinal structure of the roof of the present utility model;
FIG. 3 is a schematic view of the transverse structure of the roof of the present utility model;
FIG. 4 is a schematic view of the top plate and the bracket according to the present utility model;
FIG. 5 is a schematic view of a wind clip according to the present utility model;
FIG. 6 is a table of the calculation of the k value of the thermal conductivity of the roof according to the utility model.
In the figure, the purlin 1, the top plate 2, the second heat preservation layer 3, the waterproof and breathable layer 4, the first heat preservation layer 5, the steel wire mesh 6, the infrared heat insulation reflecting film 7, the bracket 8, the wind-resistant clamp 9 and the supporting layer 10 are arranged.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1, the novel steel structure roof structure comprises a plurality of purlines 1 arranged on steel beams, wherein steel wire nets 6 are paved on the purlines 1, a first heat preservation layer 5 is arranged on the steel wire nets 6, a support layer 10 is arranged on the first heat preservation layer 5, a second heat preservation layer 3 is arranged on the support layer 10, an infrared heat insulation reflecting film 7 is arranged on the second heat preservation layer 3, a top plate 2 is arranged on the infrared heat insulation reflecting film 7, and adjacently arranged top plates 2 are connected through wind-resistant clamps 9; the roof structure is arranged on the roof, and the supporting layer 10 is arranged between the first heat preservation layer 3 and the second heat preservation layer 5, so that the tensile force of wind load is resisted while the roof pressure is born, and the wind uncovering resistance of the roof is improved; the adjacent top plates 2 are fixed through the wind-resistant clamps 9, so that threaded holes are prevented from being formed in the top plates 2, rainwater is prevented from penetrating into the roof from the threaded holes, and the overall service life of the roof is prolonged; the infrared heat insulation reflecting film 7 reflects heat generated on the top plate 2, so that the heat insulation performance of the roof is improved; two heat-insulating layers are arranged, and an air-insulating layer, a waterproof and breathable layer 4 and an additional waterproof layer are respectively arranged on the heat-insulating layers and used for improving the heat preservation, heat insulation, noise reduction and waterproof effects of the roof.
As shown in fig. 2, 3, 4 and 5, in this embodiment, the top plate 2 is an aluminum-magnesium-manganese profiled metal plate, the thickness is 0.90, the model is YX65-430, and the top plate is dark gray; the thickness of the infrared heat insulation reflecting film 7 is 0.30, and the infrared heat insulation reflecting film is made of PET base material; the waterproof coiled material adopts TPO waterproof coiled material support, the thickness is 1.20, the standard material, the Thermoplastic Polyolefin (TPO) is not exposed, overlap joint width is 120; the second heat-insulating layer 3 adopts a hard rock wool sound-insulating and noise-reducing plate with the thickness of 50 and the density of 120kg; the thickness of the non-woven fabric of the protective layer of the second heat preservation layer is 0.60mm; the supporting layer 10 is a hot dip galvanized profiled sheet, the model is YX35-750, the thickness is 0.80, and the double-sided galvanization amount is not less than 275g/m < 2 >; the first heat preservation layer 5 adopts a heat insulation glass fiber cotton felt with the thickness of 100 and the density of 16kg; the thickness of the vapor barrier layer is 0.30 polypropylene film material, the water vapor transmission rate is less than 10g/m2.24h or 0.10 thick composite aluminum foil, the water vapor transmission rate is less than 25g/m2.24h, and the lap joint width is not less than 100; the steel wire mesh 6 adopts a phi 1.0 stainless steel wire mesh; the purline 1 adopts a galvanized rectangular pipe; in actual installation, the novel steel structure roof structure in the embodiment is arranged at a certain angle, and the angle is 5 degrees; the steel beam is arranged on an original building steel structure, purlines 1 are arranged along the length direction of the steel beam, the purlines 1 are connected with a steel beam mechanism, steel wire nets 6 are paved on the purlines 1 and are connected with the mechanism, first heat preservation layers 5 are paved on the steel wire nets 6, air isolation layers and waterproof breathable layers are respectively arranged on the upper surface and the lower surface of the first heat preservation layers 5, wherein the air isolation layers are in contact with the steel wire nets 6 and used for preventing indoor steam from penetrating into the first heat preservation layers 5; the high-temperature radiant heat shining in summer causes the moisture in the heat preservation layer to be vaporized and expand in volume, which can cause the waterproof coiled material layer arranged on the heat preservation layer to bulge, the external temperature in winter is reduced to below 0 ℃, and the moisture retained in the heat preservation layer can be condensed water to enter the room, so that the use function is affected; the waterproof breathable layer is positioned on the first heat preservation layer 5 and is used for penetrating water vapor in the first heat preservation layer 5 and preventing condensed water from entering the first heat preservation layer 5; the first heat preservation layer 5 is provided with a support layer 10, the lower groove of the support layer 10 is fixed with the purline 1 through self-tapping nails, and non-woven fabrics are paved on the support layer 10, and the non-woven fabrics are a new generation of environment-friendly materials, and have the advantages of good strength, ventilation, environment friendliness, flexibility, no toxicity or smell, low price and the like; the support layer 10 is provided with a second heat preservation layer 3, an additional purline is arranged in the second heat preservation layer 3, an upper groove of the support layer 10 is fixed with the additional purline through self-tapping nails, the support layer 10 is used for bearing the pressure of a roof and simultaneously resisting the tensile force caused by wind load, so that the wind uncovering resistance of the roof is improved, the additional purline adopts a galvanized sheet piece, and glass fiber cotton felt is filled in the galvanized sheet piece; the support 8 is arranged on the additional purline, the protective layer, namely the non-woven fabric, is arranged on the lower surface of the second heat preservation layer 3, the additional waterproof layer is arranged on the upper surface of the second heat preservation layer 3, the lower end of the support 8 is connected with the additional purline mechanism, the additional purline is used for fixing the additional waterproof layer and the top plate 2 which are arranged on the second heat preservation layer 3, and a distance of 2cm is reserved between the infrared heat insulation reflecting film 7 and the top plate 2 and used for reflecting heat on the top plate 2; the roof is formed by splicing a plurality of infrared heat-insulating reflecting films 7 and a roof 2, the upper ends of the brackets 8 are positioned in gaps between the adjacent infrared heat-insulating reflecting films 7 and the adjacent roof 2, the wind-resistant clamps 9 are arranged on the roof 2, the wind-resistant clamps 9 are used for fixing the adjacent roof 2 on the brackets 8, the wind-resistant clamps 9 comprise two oppositely arranged connecting plates, the upper ends of the two connecting plates are fixed through bolts, the lower ends of the two connecting plates clamp the adjacent roof 2 and the brackets 8, namely one connecting plate is positioned on one of the roof 2, the other connecting plate is positioned on the other roof 2 which is adjacently arranged, because the upper ends of the two connecting plates are fixed through bolts, the upper ends of the brackets 8 extend into the gaps between the adjacent roof 2 to provide supporting force for the roof, when the two connecting plates are fixed through the bolts, the two adjacent roof 2 are also fixed on the brackets 8 at the same time, threaded holes are prevented from being formed in the roof 2, rainwater is prevented from penetrating into the roof from the threaded holes, and the whole service life of the roof structure is prolonged.
As shown in fig. 6, according to the utility model, a plurality of purlines 1 are arranged on a steel beam, a steel wire mesh 6 is paved on the purlines 1, a first heat insulation layer 5, a supporting layer 10, a second heat insulation layer 3, an additional waterproof layer, an infrared heat insulation reflecting film 7 and a top plate 2 are sequentially arranged on the steel wire mesh 6, the adjacently arranged top plates 2 are connected through an anti-wind clamp 9, the supporting layer 10 is arranged between the first heat insulation layer 5 and the second heat insulation layer 3, and the tensile force of wind load is resisted while the pressure of a roof is born, so that the anti-wind uncovering performance of the roof is improved; the adjacent top plates 2 are fixed through the wind-resistant clamps 9, so that threaded holes are prevented from being formed in the top plates 2, rainwater is prevented from penetrating into the roof from the threaded holes, and the overall service life of the roof is prolonged; the infrared heat-insulating reflective film 7 reflects heat on the top plate 2, so that the heat-insulating performance of the roof is improved; two heat-insulating layers are arranged, and an air-insulating layer, a waterproof and breathable layer 4 and an additional waterproof layer are respectively arranged on the heat-insulating layers and used for improving the heat preservation, heat insulation, noise reduction and waterproof effects of the roof.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (10)
1. The utility model provides a novel steel construction roofing structure, its characterized in that, including setting up many purlins on the girder steel, its characterized in that, the purlin upper berth is equipped with the wire net, be provided with first heat preservation on the wire net, be provided with the supporting layer on the first heat preservation, be provided with the second heat preservation on the supporting layer, be provided with the thermal-insulated reflective film of infrared on the second heat preservation, be provided with the roof on the thermal-insulated reflective film of infrared, the roof that the adjacent set up is connected through the anti-wind clamp.
2. The novel steel structure roof structure of claim 1, wherein: the upper and lower surfaces of the first heat preservation layer are respectively provided with a vapor barrier layer and a waterproof and vapor permeable layer, and the upper and lower surfaces of the second heat preservation layer are respectively provided with a protective layer and an additional waterproof layer; the second heat preservation layer is internally provided with an additional purline, and the supporting layer is fixed with the purline and the additional purline through self-tapping nails.
3. The novel steel structure roof structure of claim 1, wherein: an additional waterproof layer is further arranged between the infrared heat insulation reflecting film and the second heat preservation layer.
4. The novel steel structure roof structure of claim 2, wherein: the additional purlines are provided with brackets, the upper ends of the brackets extend into the space between the adjacent top plates, and the wind-resistant clamps fix the top plates on the brackets.
5. A novel steel structure roofing structure according to claim 3, characterized in that: the wind-resistant clamp comprises two oppositely arranged connecting plates, the upper ends of the two connecting plates are fixed through bolts, and the lower ends of the two connecting plates clamp the top plates and the brackets which are adjacently arranged.
6. The novel steel structure roof structure of claim 2, wherein: the additional purlines are galvanized few parts, and rock wool is filled in the galvanized few parts.
7. The novel steel structure roof structure of claim 1, wherein: the first heat preservation layer and the second heat preservation layer are respectively a heat-insulating glass fiber cotton felt and a hard rock cotton sound insulation noise reduction plate, wherein the heat-insulating glass fiber cotton felt is used for heat preservation, and the hard rock cotton sound insulation noise reduction plate is used for heat preservation and noise reduction.
8. The novel steel structure roof structure of claim 2, wherein: the supporting layer adopts hot dip galvanized profiled sheet, hot dip galvanized profiled sheet upper and lower recess respectively with additional purlin and purlin fixed connection.
9. The novel steel structure roof structure of claim 2, wherein: the waterproof and vapor-permeable layers are respectively aluminum foil and waterproof and vapor-permeable film, and the additional waterproof layer is a waterproof coiled material.
10. The novel steel structure roof structure of claim 1, wherein: the top plate is an aluminum-magnesium-manganese profiling metal plate, and a space is reserved between the infrared heat insulation reflecting film and the aluminum-magnesium-manganese profiling metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320178675.XU CN219808595U (en) | 2023-02-10 | 2023-02-10 | Novel steel construction roofing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320178675.XU CN219808595U (en) | 2023-02-10 | 2023-02-10 | Novel steel construction roofing structure |
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| Publication Number | Publication Date |
|---|---|
| CN219808595U true CN219808595U (en) | 2023-10-10 |
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ID=88214489
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320178675.XU Active CN219808595U (en) | 2023-02-10 | 2023-02-10 | Novel steel construction roofing structure |
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| Country | Link |
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| CN (1) | CN219808595U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118110311A (en) * | 2024-01-22 | 2024-05-31 | 沈阳腾越建筑工程有限公司 | Energy-saving and environmentally friendly heat-insulating roof structure and construction method |
-
2023
- 2023-02-10 CN CN202320178675.XU patent/CN219808595U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118110311A (en) * | 2024-01-22 | 2024-05-31 | 沈阳腾越建筑工程有限公司 | Energy-saving and environmentally friendly heat-insulating roof structure and construction method |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240401 Address after: 710000, No.508 Xiying Road, Qujiang New District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Xiying Cultural Tourism Development Co.,Ltd. Country or region after: China Address before: Room 807, Fangxing Building, No. 35, Beiguanzheng Street, Lianhu District, Xi'an City, Shaanxi Province, 710000 Patentee before: SHAANXI HUABANG CONSTRUCTION ENGINEERING Co.,Ltd. Country or region before: China |