CN212232365U - Intelligent agricultural greenhouse solar power supply system - Google Patents
Intelligent agricultural greenhouse solar power supply system Download PDFInfo
- Publication number
- CN212232365U CN212232365U CN202020610788.9U CN202020610788U CN212232365U CN 212232365 U CN212232365 U CN 212232365U CN 202020610788 U CN202020610788 U CN 202020610788U CN 212232365 U CN212232365 U CN 212232365U
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- China
- Prior art keywords
- rotating rod
- power supply
- photovoltaic
- supply system
- roof truss
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- 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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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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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]
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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
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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- Greenhouses (AREA)
Abstract
The utility model discloses an intelligent agricultural greenhouse solar power supply system, which comprises a rotating mechanism, a rotating rod and a power supply device, wherein the rotating rod is horizontally arranged on a roof truss of a greenhouse; the lighting mechanism comprises a plurality of photovoltaic plates fixed with the two sides of the rotating rod, the planes of the photovoltaic plates are parallel to the axis of the rotating rod, the roof truss is provided with a ventilation port, and the roof truss is covered with a transparent plate except the ventilation port; when the plane of the photovoltaic panel is parallel to the plane of the transparent plate, the photovoltaic panel covers the ventilation opening; when the plane of the photovoltaic panel and the plane of the transparent plate form an included angle, the ventilation port is communicated inside and outside; the light-emitting mechanism comprises a plurality of illuminating lamps arranged on the surface of the rotating rod, and the illuminating lamps are arranged below the transparent plate. Adopt this utility model whole big-arch shelter solar energy power supply system integrated level high, collect daylighting, power consumption, action as an organic whole. The glass house is convenient to directly install on the basis of the existing glass house and greenhouse, and the transformation cost is low.
Description
Technical Field
The utility model relates to an agricultural greenhouse field, concretely relates to intelligent agricultural greenhouse solar energy power supply system.
Background
A frame film-covered structure with excellent heat-insulating performance for agricultural greenhouses is generally made up of steel skeleton and one or more layers of heat-insulating plastic film. Also there is the collocation of green house big-arch shelter and solar photovoltaic board nowadays, but most collocation is the simple stack of green house and photovoltaic board, and the integrated effect is low. The greenhouse structure with the photovoltaic panels generally needs to be newly built in advance, and the initial construction cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide an intelligent agricultural greenhouse solar energy power supply system, whole big-arch shelter solar energy power supply system integrated level is high, collects daylighting, power consumption, action as an organic whole. The glass house is convenient to directly install on the basis of the existing glass house and greenhouse, and the transformation cost is low.
In order to solve the above problem, the utility model provides an intelligent agricultural greenhouse solar energy power supply system, for reaching the above-mentioned purpose, the utility model provides a technical scheme that its technical problem adopted is:
an intelligent agricultural greenhouse solar power supply system, comprising: the rotating mechanism comprises a rotating rod horizontally arranged on a roof truss of the greenhouse, and one end of the rotating rod is provided with a servo motor for driving the rotating rod to rotate around the axis of the rotating rod; the lighting mechanism comprises a plurality of photovoltaic plates fixed with the two sides of the rotating rod, the planes of the photovoltaic plates are parallel to the axis of the rotating rod, the roof truss is provided with a ventilation port, and the roof truss is covered with a transparent plate except the ventilation port; when the plane of the photovoltaic panel is parallel to the plane of the transparent plate, the photovoltaic panel covers the ventilation opening; when the plane of the photovoltaic panel and the plane of the transparent plate form an included angle, the ventilation port is communicated inside and outside; the light-emitting mechanism comprises a plurality of illuminating lamps arranged on the surface of the rotating rod, and the illuminating lamps are arranged below the transparent plate; the rotating rod is internally provided with a hollow cavity, a wire is arranged in the hollow cavity to connect the photovoltaic panel with the illuminating lamp and the servo motor, and the photovoltaic panel transmits electric power to the illuminating lamp and the servo motor.
The beneficial effect of adopting above-mentioned technical scheme is: the whole greenhouse solar power supply system is high in integration level, the photovoltaic panel, the illuminating lamp, the rotating rod and the servo motor are integrated, and the solar power supply system integrates lighting, power utilization and action. The glass house is convenient to directly install on the basis of the existing glass house and greenhouse, and has low transformation cost and low workload. The rotating rod can rotate around the axis of the rotating rod within a certain angle range, and all planes of the photovoltaic panels are perpendicular to the illumination direction as much as possible, so that the maximum photoelectric effect is obtained. Simultaneously the photovoltaic board also can play the effect of transom, and the photovoltaic board still plays the effect of transom that can open and shut. The servo motor provides power for the rotation of the rotating rod at a certain angle. The photovoltaic board absorbs excessive solar energy daytime, is used for the illumination evening, promotes photosynthesis. The electric power of the illuminating lamp and the servo motor is provided by the photovoltaic panel, an external power supply is not needed, and the independence is good. All wires are also wired in the hollow pipe, so that the integration level and the cleanliness are further improved, and the environmental tolerance is improved.
As a further improvement of the utility model, the lighting lamps are arranged along the rotating rod at equal intervals.
The beneficial effect of adopting above-mentioned technical scheme is: the lighting lamps arranged at equal intervals enable the brightness to be uniform as much as possible.
As a further improvement, the illuminating lamp is an LED lamp emitting red light or blue light.
The beneficial effect of adopting above-mentioned technical scheme is: the photosynthetic effect of red and blue light is high, and the power consumption of the LED is relatively small.
As the utility model discloses a further improvement again, the space plane coincidence in place of the photovoltaic board of bull stick both sides, the photovoltaic board quantity of bull stick both sides equals.
The beneficial effect of adopting above-mentioned technical scheme is: the photovoltaic panel is arranged along two sides of the rotating rod, so that the integral mass center is basically on the rotating rod, and the rotating force required by the rotating rod is small. The rotating rod is not easy to be pressed by the weight of the photovoltaic panel to be twisted and deformed.
As a further improvement, the axis of the rotating rod is unidirectional, and the photovoltaic panels are alternately arranged at intervals along the two sides of the rotating rod.
The beneficial effect of adopting above-mentioned technical scheme is: the photovoltaic board of arranging in turn makes every photovoltaic board periphery all possess the transparent plate, compares the photovoltaic board that the single file was closely arranged, and the photovoltaic board of interval arrangement in turn reduces the inside shading effect of big-arch shelter under the prerequisite that does not reduce photoelectric conversion area like this. So that the illumination of crops in the greenhouse is more uniform.
As the utility model discloses a further improvement again, the photovoltaic board possesses the bracing piece in the one side towards big-arch shelter inside, and the bracing piece extension orbit on every photovoltaic board is the V font, and it is one-way along the axis of bull stick, and the bracing piece on the photovoltaic board links to each other with the bracing piece of the adjacent photovoltaic board of opposite side, wholly constitutes the continuous bracing piece group of zigzag.
The beneficial effect of adopting above-mentioned technical scheme is: the supporting rod plays a supporting role on the photovoltaic panel, and the structural strength of the rotating rod, the supporting rod and the photovoltaic panel are integrated is improved.
As the utility model discloses a further improvement again, the bearing is passed through at the bull stick both ends and the assembly of roof truss, and the servo motor outer wall is integrative fixed with the roof truss.
The beneficial effect of adopting above-mentioned technical scheme is: the resistance that needs overcome when reducing the bull stick rotation, strengthen servo motor's stability simultaneously.
As the utility model discloses a further improvement again, the shared space of roof truss is the horizontally triangular prism form, still possesses the cuboid frame that covers by the transparent plate under the roof truss, supplies to hold crops in the cuboid frame, and the shared space of cuboid frame is the cuboid form, is equipped with the transparent film that can open and shut between roof truss and the cuboid frame.
The beneficial effect of adopting above-mentioned technical scheme is: the transparent film can be opened and closed like a curtain, and is horizontal when being pulled open. When ventilation is needed, the transparent film is pulled and folded to one side, so that the space in the whole greenhouse frame is through. When not needing ventilative, the transparent film is straightened, separates the upper and lower space in the big-arch shelter for the inside airtight space of cuboid frame that crops are in guarantees the heat preservation effect of big-arch shelter, and the rotation of bull stick this moment mainly plays the angle modulation effect of photovoltaic board, does not relate to ventilative.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of one embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of an embodiment of the present invention at A;
FIG. 3 is a perspective view of an embodiment of the present invention;
FIG. 4 is a perspective view of an embodiment of the present invention;
fig. 5 is a perspective view of an embodiment of the present invention.
1-greenhouse frame; 101-a cuboid frame; 102-roof trusses; 2-a photovoltaic panel; 3-a servo motor; 4-rotating the rod; 5-lighting lamp; 6-supporting rods; 7-a transparent plate; 8-ventilating port; 9-transparent film.
Detailed Description
The following detailed description is made in conjunction with specific embodiments of the present invention:
in order to reach the utility model discloses a purpose, an intelligent green house solar energy power supply system, include: the rotating mechanism comprises a rotating rod 4 horizontally arranged on a roof truss 102 of the greenhouse, and one end of the rotating rod 4 is provided with a servo motor 3 for driving the rotating rod 4 to rotate around the axis of the rotating rod 4; the lighting mechanism comprises a plurality of photovoltaic panels 2 fixed with two sides of the rotating rod 4, the planes of the photovoltaic panels 2 are parallel to the axis of the rotating rod 4, the roof truss 102 is provided with a ventilation opening 8, and the roof truss 102 is covered with a transparent plate 7 except the ventilation opening 8; when the plane of the photovoltaic panel 2 is parallel to the plane of the transparent plate 7, the photovoltaic panel 2 covers the ventilation opening 8; when the plane of the photovoltaic panel 2 and the plane of the transparent plate 7 form an included angle, the ventilation port 8 is communicated inside and outside; the light-emitting mechanism comprises a plurality of illuminating lamps 5 arranged on the surface of the rotating rod 4, and the illuminating lamps 5 are arranged below the transparent plate 7; the rotating rod 4 is internally provided with a hollow cavity, a wire is arranged in the hollow cavity to connect the photovoltaic panel 2 with the illuminating lamp 5 and the servo motor 3, and the photovoltaic panel 2 transmits power to the illuminating lamp 5 and the servo motor 3.
The beneficial effect of adopting above-mentioned technical scheme is: the whole greenhouse solar power supply system is high in integration level, the photovoltaic panel, the illuminating lamp, the rotating rod and the servo motor are integrated, and the solar power supply system integrates lighting, power utilization and action. The glass house is convenient to directly install on the basis of the existing glass house and greenhouse, and has low transformation cost and low workload. The rotating rod can rotate around the axis of the rotating rod within a certain angle range, and all planes of the photovoltaic panels are perpendicular to the illumination direction as much as possible, so that the maximum photoelectric effect is obtained. Simultaneously the photovoltaic board also can play the effect of transom, and the photovoltaic board still plays the effect of transom that can open and shut. The servo motor provides power for the rotation of the rotating rod at a certain angle. The photovoltaic board absorbs excessive solar energy daytime, is used for the illumination evening, promotes photosynthesis. The electric power of the illuminating lamp and the servo motor is provided by the photovoltaic panel, an external power supply is not needed, and the independence is good. All wires are also wired in the hollow pipe, so that the integration level and the cleanliness are further improved, and the environmental tolerance is improved.
In other embodiments of the present invention, the illuminating lamps 5 are arranged at equal intervals along the rotating rod 4.
The beneficial effect of adopting above-mentioned technical scheme is: the lighting lamps arranged at equal intervals enable the brightness to be uniform as much as possible.
In other embodiments of the present invention, the illumination lamp 5 is an LED lamp emitting red light or blue light.
The beneficial effect of adopting above-mentioned technical scheme is: the photosynthetic effect of red and blue light is high, and the power consumption of the LED is relatively small.
The utility model discloses an in other embodiments, the space plane coincidence in photovoltaic board 2 place of 4 both sides of bull stick, the photovoltaic board 2 quantity of 4 both sides of bull stick equals.
The beneficial effect of adopting above-mentioned technical scheme is: the photovoltaic panel is arranged along two sides of the rotating rod, so that the integral mass center is basically on the rotating rod, and the rotating force required by the rotating rod is small. The rotating rod is not easy to be pressed by the weight of the photovoltaic panel to be twisted and deformed.
In other embodiments of the present invention, the axis along the rotating rod 4 is unidirectional, and the photovoltaic panels 2 are alternately arranged along the two sides of the rotating rod 4.
The beneficial effect of adopting above-mentioned technical scheme is: the photovoltaic board of arranging in turn makes every photovoltaic board periphery all possess the transparent plate, compares the photovoltaic board that the single file was closely arranged, and the photovoltaic board of interval arrangement in turn reduces the inside shading effect of big-arch shelter under the prerequisite that does not reduce photoelectric conversion area like this. So that the illumination of crops in the greenhouse is more uniform.
The utility model discloses an in other embodiments, photovoltaic board 2 possesses bracing piece 6 in the one side towards the big-arch shelter inside, and the bracing piece 6 extension orbit on every photovoltaic board 2 is the V font, and it is one-way along the axis of bull stick 4, and bracing piece 6 on the photovoltaic board 2 links to each other with the bracing piece 6 of the adjacent photovoltaic board 2 of opposite side, wholly constitutes the continuous bracing piece group of zigzag.
The beneficial effect of adopting above-mentioned technical scheme is: the supporting rod plays a supporting role on the photovoltaic panel, and the structural strength of the rotating rod, the supporting rod and the photovoltaic panel are integrated is improved.
In other embodiments of the present invention, the two ends of the rotating rod 4 are assembled with the roof truss 102 through bearings, and the outer wall of the servo motor 3 is integrally fixed with the roof truss 102.
The beneficial effect of adopting above-mentioned technical scheme is: the resistance that needs overcome when reducing the bull stick rotation, strengthen servo motor's stability simultaneously.
In other embodiments of the present invention, the space occupied by the roof truss 102 is a horizontal triangular prism, the roof truss 102 further has a rectangular parallelepiped frame 101 covered by the transparent plate 7, crops are accommodated in the rectangular parallelepiped frame 101, the space occupied by the rectangular parallelepiped frame 101 is a rectangular parallelepiped, and the transparent film 9 which can be opened and closed is provided between the roof truss 102 and the rectangular parallelepiped frame 101.
The roof truss and the cuboid frame form an integral greenhouse frame 1.
The beneficial effect of adopting above-mentioned technical scheme is: the transparent film can be opened and closed like a curtain, and is horizontal when being pulled open. When ventilation is needed, the transparent film is pulled and folded to one side, so that the space in the whole greenhouse frame is through. When not needing ventilative, the transparent film is straightened, separates the upper and lower space in the big-arch shelter for the inside airtight space of cuboid frame that crops are in guarantees the heat preservation effect of big-arch shelter, and the rotation of bull stick this moment mainly plays the angle modulation effect of photovoltaic board, does not relate to ventilative.
In fig. 1, the transparent plate 7 and the transparent film 9 are hidden for convenience of representation of the respective structures. What is covered by the layer with broken lines in fig. 3 and 5 is represented by the transparent plate 7. What is covered by the layer of dashed lines in fig. 4 is represented by the transparent film 9. Fig. 1 and 2 show the support bar 6 on the back side of the photovoltaic panel 2 by means of dashed lines.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. The utility model provides an intelligent agriculture big-arch shelter solar energy power supply system which characterized in that includes:
the rotating mechanism comprises a rotating rod horizontally arranged on a roof truss of the greenhouse, and one end of the rotating rod is provided with a servo motor for driving the rotating rod to rotate around the axis of the rotating rod;
the lighting mechanism comprises a plurality of photovoltaic plates fixed with two sides of the rotating rod, the planes of the photovoltaic plates are parallel to the axis of the rotating rod, the roof truss is provided with a ventilation port, and the roof truss is covered with a transparent plate except the ventilation port; when the plane of the photovoltaic panel is parallel to the plane of the transparent plate, the photovoltaic panel covers the ventilation opening; when the plane of the photovoltaic panel and the plane of the transparent plate form an included angle, the ventilation port is communicated inside and outside;
the light-emitting mechanism comprises a plurality of illuminating lamps arranged on the surface of the rotating rod, and the illuminating lamps are arranged below the transparent plate;
the interior of the rotating rod is provided with a hollow cavity, a wire is arranged in the hollow cavity and connected with the photovoltaic panel, the illuminating lamp and the servo motor, and the photovoltaic panel transmits power to the illuminating lamp and the servo motor.
2. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the lighting lamps are arranged at equal intervals along the rotating rod.
3. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the illuminating lamp is an LED lamp emitting red light or blue light.
4. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the space planes of the photovoltaic panels on the two sides of the rotating rod are overlapped, and the number of the photovoltaic panels on the two sides of the rotating rod is equal.
5. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the photovoltaic panels are alternately arranged at intervals along two sides of the rotating rod in a single direction along the axis of the rotating rod.
6. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the photovoltaic board possesses the bracing piece in the one side towards big-arch shelter inside, and the bracing piece extension orbit on every photovoltaic board is the V font, and is one-way along the axis of bull stick, bracing piece on the photovoltaic board links to each other with the bracing piece of the adjacent photovoltaic board of opposite side, wholly constitutes the continuous bracing piece group of zigzag.
7. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the two ends of the rotating rod are assembled with the roof truss through bearings, and the outer wall of the servo motor is integrally fixed with the roof truss.
8. The intelligent agricultural greenhouse solar power supply system of claim 1, wherein: the shared space of roof truss is the horizontally triangular prism form, still possess the cuboid frame that covers by the transparent plate under the roof truss, supply to hold crops in the cuboid frame, the shared space of cuboid frame is the cuboid form, be equipped with the transparent film that can open and shut between roof truss and the cuboid frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610788.9U CN212232365U (en) | 2020-04-22 | 2020-04-22 | Intelligent agricultural greenhouse solar power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020610788.9U CN212232365U (en) | 2020-04-22 | 2020-04-22 | Intelligent agricultural greenhouse solar power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212232365U true CN212232365U (en) | 2020-12-29 |
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ID=74003608
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020610788.9U Expired - Fee Related CN212232365U (en) | 2020-04-22 | 2020-04-22 | Intelligent agricultural greenhouse solar power supply system |
Country Status (1)
| Country | Link |
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| CN (1) | CN212232365U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113228997A (en) * | 2021-06-16 | 2021-08-10 | 安徽昂科丰光电科技有限公司 | Adjustable greenhouse for crops |
| CN114953141A (en) * | 2022-06-06 | 2022-08-30 | 中交二航局第四工程有限公司安徽混凝土装配化构件分公司 | Segment box girder winter construction is with heating heat preservation device |
-
2020
- 2020-04-22 CN CN202020610788.9U patent/CN212232365U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113228997A (en) * | 2021-06-16 | 2021-08-10 | 安徽昂科丰光电科技有限公司 | Adjustable greenhouse for crops |
| CN113228997B (en) * | 2021-06-16 | 2023-04-07 | 安徽昂科丰光电科技有限公司 | Adjustable greenhouse for crops |
| CN114953141A (en) * | 2022-06-06 | 2022-08-30 | 中交二航局第四工程有限公司安徽混凝土装配化构件分公司 | Segment box girder winter construction is with heating heat preservation device |
| CN114953141B (en) * | 2022-06-06 | 2024-06-11 | 中交二航局第四工程有限公司安徽混凝土装配化构件分公司 | Heating and heat preservation device for winter construction of segmental box girder |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201229 Termination date: 20210422 |