CN112314268A - Vegetable greenhouse irrigation equipment - Google Patents
Vegetable greenhouse irrigation equipment Download PDFInfo
- Publication number
- CN112314268A CN112314268A CN202011095198.8A CN202011095198A CN112314268A CN 112314268 A CN112314268 A CN 112314268A CN 202011095198 A CN202011095198 A CN 202011095198A CN 112314268 A CN112314268 A CN 112314268A
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- CN
- China
- Prior art keywords
- water
- cover
- top cover
- fixedly connected
- blade
- 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.)
- Pending
Links
- 230000002262 irrigation Effects 0.000 title claims abstract description 18
- 238000003973 irrigation Methods 0.000 title claims abstract description 18
- 235000013311 vegetables Nutrition 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 131
- 238000005507 spraying Methods 0.000 claims abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 22
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 241000207965 Acanthaceae Species 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/247—Watering arrangements
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Nozzles (AREA)
Abstract
The invention relates to the technical field of irrigation devices, in particular to a vegetable greenhouse irrigation device which comprises a rotary spray head, wherein the rotary spray head comprises a top cover, the top cover is fixedly connected with an installation frame, the opening of the top cover is downward, a horizontally arranged blade water wheel is arranged in the top cover, the top surface of the blade water wheel is coaxial and is rotatably connected with a rotating shaft, the rotating shaft is fixedly connected with the top wall of the top cover, the water outlet direction of a water inlet pipe is arranged along the tangential direction of the top cover, the end part of a blade of the blade water wheel is fixedly connected with a filter screen cover, and one side of; the water spraying cover is characterized in that the opening end of the top cover is detachably connected with a conical cylinder, a plurality of water spraying holes are formed in the circumferential direction of the water spraying cover, a blade plate used for pushing the water spraying cover to rotate through water flow is fixedly connected to the inner circumferential wall of the water spraying cover, and the blade plate is distributed at equal angles. This device can make shower nozzle spun water cleaner, reduces the probability that gravel and sand will spray water hole jam, and it is simple and convenient to maintain simultaneously.
Description
Technical Field
The invention relates to the technical field of irrigation devices, in particular to a vegetable greenhouse irrigation device.
Background
The spray irrigation is an irrigation mode that water with certain pressure is sprayed into the air by means of a water pump and a pipeline system or by utilizing the fall of a natural water source to be dispersed into small water drops or form mist to fall onto plants and the ground.
When in sprinkling irrigation, the water spray holes of the spray head are easily blocked by impurities due to the fact that the water contains some fine impurity particles, and the spray head cannot work normally.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, as the water contains impurity particles, the water spray holes of a spray head are easily blocked by impurities, so that the spray head cannot work normally, and provides the irrigation device for the vegetable greenhouse.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vegetable greenhouse irrigation device comprises a greenhouse body and is characterized in that two inner water pools are fixedly connected to two sides of the upper portion of the interior of the greenhouse body respectively, the inner water pools are connected with a water source, a horizontally arranged mounting frame is mounted between the two inner water pools, power walking devices are arranged between two ends of the mounting frame and the inner water pools, the mounting frame is made to move along the length direction of the greenhouse through the power walking devices, a water pump is fixedly connected to the mounting frame, a plurality of rotary spray heads are mounted at the bottom of the mounting frame in a hanging mode, the water inlet end of the water pump is communicated with the inner water pools, and the water outlet end of the water pump is communicated with the;
the rotary spray head comprises a top cover, the top cover is fixedly connected with an installation frame, the opening of the top cover is downward, a horizontally arranged blade water wheel is arranged in the top cover, the top surface of the blade water wheel is coaxially and rotatably connected with a rotating shaft, the rotating shaft is fixedly connected with the top wall of the top cover, the outer circumference of the top cover is provided with an annular pipe, the annular pipe is communicated with the water outlet end of a water pump, a plurality of water inlet pipes are fixedly connected with the inner circumference of the annular pipe at equal angles, the other ends of the water inlet pipes are fixedly connected with the outer circumferential wall of the top cover, one ends of the water inlet pipes are communicated with the annular pipe, the other ends of the water inlet pipes are communicated with the inner cavity of the top cover, the;
the water spraying device is characterized in that the opening end of the top cover is detachably connected with a conical cylinder, the larger end of the conical cylinder is directed to the top cover, the smaller end of the conical cylinder is connected with a water spraying cover capable of rotating, a plurality of water spraying holes are circumferentially formed in the water spraying cover, the inner circumferential wall of the water spraying cover is fixedly connected with a blade plate used for pushing the water spraying cover to rotate through water flow, and the blade plate is distributed at equal angles.
And two sides of the end part of each blade of the blade water wheel are fixedly connected with a filter screen cover.
The small end of the opening of the conical cylinder is integrally formed with a conical extending portion, the small end of the opening of the conical extending portion is rotatably connected with the water spraying cover, an annular collecting plate is fixedly connected to the inner wall of the small end of the opening of the conical extending portion, and a settling tank is formed between the annular collecting plate and the inner wall of the conical extending portion.
The top cap of big-arch shelter body is the herringbone structure, big-arch shelter body outside upper portion is followed its length direction rigid coupling and is had the outer pond that is used for connecing the rainwater, outer pond and interior pond pass through the intercommunicating pore intercommunication, the intercommunicating pore is downthehole to install the filter.
The vegetable greenhouse irrigation device provided by the invention has the beneficial effects that: this device can make shower nozzle spun water cleaner, reduces the probability that gravel and sand will spray water hole jam, and it is simple and convenient to maintain simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is a schematic bottom view of the paddlewheel of the present invention;
FIG. 4 is a schematic perspective view of a paddlewheel according to the present invention;
FIG. 5 is a schematic view of the internal structure of the greenhouse of the present invention
In the figure: the device comprises a blade plate 1, a water spraying cover 2, a water spraying hole 3, a conical cylinder 4, a top cover 5, a water inlet pipe 6, an annular pipe 7, a filter screen cover 8, a blade water wheel 9, a rotating shaft 10, a mounting frame 11, an annular collecting plate 12, a settling tank 13, a conical extending part 14, an outer water tank 15, an inner water tank 16, a rotary spray head 17, a water pump 18 and a power walking device 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, 3 and 5, the vegetable greenhouse irrigation device comprises a greenhouse body and is characterized in that two inner water pools 16 are fixedly connected to two sides of the upper portion of the interior of the greenhouse body respectively, the inner water pools 16 are connected with a water source, a horizontally arranged mounting frame 11 is installed between the two inner water pools 16, power walking devices 19 are arranged between two ends of the mounting frame 11 and the inner water pools 16, the mounting frame 11 is enabled to move along the length direction of the greenhouse through the power walking devices 19, a water pump 18 is fixedly connected to the mounting frame 11, a plurality of rotary spray heads are installed at the bottom of the mounting frame 11 in a hanging mode, the water inlet end of the water pump 18 is communicated with the inner water pools 16, and the water outlet end;
when greenhouse vegetables need sprinkling irrigation, the power walking device 19 drives the mounting frame 11 to move above the vegetables, and then water is sent into the rotary spray head 17 through the water pump 18, wherein the power walking device 19 can drive the rollers to move above the inner water pool by adopting a motor, or drive the gears to move above the racks by adopting the motor.
The rotary spray head 17 comprises a top cover 5, the top cover 5 is fixedly connected with an installation frame 11, the opening of the top cover 5 faces downwards, a horizontally arranged blade water wheel 9 is arranged in the top cover 5, the top surface of the blade water wheel 9 is coaxially and rotatably connected with a rotating shaft 10, the rotating shaft 10 is fixedly connected with the top wall of the top cover 5, the outer circumference of the top cover 5 is provided with an annular pipe 7, the annular pipe 7 is communicated with the water outlet end of the water pump, the inner circumference of the annular pipe 7 is fixedly connected with a plurality of water inlet pipes 6 at equal angles, the other ends of the water inlet pipes 6 are fixedly connected with the outer circumferential wall of the top cover 5, one ends of the water inlet pipes 6 are communicated with the annular pipe 7, the other ends of the water inlet pipes 6 are communicated with the inner cavity of the top cover 5, the water outlet direction of the water;
the 5 open ends of top cap can be dismantled and be connected with a toper section of thick bamboo 4, the great directional top cap 5 of 4 openings of a toper section of thick bamboo, the less one end of 4 openings of a toper section of thick bamboo is connected with can the pivoted spray cap 2, and a plurality of hole for water spraying 3 has been seted up to 2 circumference of spray cap, and the perisporium rigid coupling has and is used for promoting through rivers and spouts 2 pivoted acanthus leaf 1, angular distribution such as acanthus leaf 1 in the spray cap 2.
Referring to fig. 1, 3, 4 and 5, water delivered by a water pump enters an annular pipe 7 and then tangentially enters a top cover 5 through a plurality of water inlet pipes 6, tangentially entering water flow forms rotational flow in the top cover 5, the rotational flow water carries a moving blade water wheel 9 to rotate, the end part of a blade of the blade water wheel 9 is fixedly connected with a filter screen cover 8, and in the process that the rotational flow water carries the moving blade water wheel 9 to rotate, under the action of centrifugal force, particle impurities in water are collected in the filter screen cover 8, rotational flow water enters the water spraying cover 2 and impacts the blade plate 1, so that the water spraying cover 2 rotates around the conical cylinder 4, water flow is sprayed out from the water spraying holes 3 of the water spraying cover 2 in a rotating mode, the probability of blockage of the water spraying holes 3 is effectively reduced, the conical cylinder 4 is detached after being used for a period of time, then can reuse the inside impurity clean-up who collects of 9 tip screen cloth covers of blade water wheels 8, maintain simple and conveniently.
In another embodiment, referring to fig. 2, a tapered extension portion 14 is integrally formed at a smaller opening end of the tapered cylinder 4, the smaller opening end of the tapered extension portion 14 is rotatably connected with the water spraying cover 2, an annular collecting plate 12 is fixedly connected to an inner wall of the smaller opening end of the tapered extension portion 14, a settling tank 13 is formed between the annular collecting plate 12 and the inner wall of the tapered extension portion 14, when whirling water passes through the tapered cylinder 4 and the tapered extension portion 14, sand and stones cling to the inner walls of the tapered cylinder 4 and the tapered extension portion 14 under the action of centrifugal force, and finally sand and stone sediment is collected in the settling tank 13 under the action of gravity and liquid flow direction, so that the sprayed water is cleaner, the probability of blockage of the water spraying hole is further reduced, after the use for a period of time, the tapered cylinder 4 is detached, and the filter screen cover 8 and.
Refer to fig. 5, the top cap of big-arch shelter body is the herringbone structure, big-arch shelter body outside upper portion has the outer pond 15 that is used for connecing the rainwater along its length direction rigid coupling, outer pond 15 passes through the intercommunicating pore intercommunication with interior pond 16, the downthehole filter of installing of intercommunicating pore, when raining, collect the rainwater through outer pond 15, the rainwater passes through the intercommunicating pore and enters interior pond 16, the confession is spouted and is irritated the use, avoid the rainwater to lead to from interior pond 16 outflow too much, make the height that highly is higher than outer pond 15 apical margin at 16 apical margin in interior pond, when the rainwater is too much, directly flow from outer pond 15 apical margin.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any technical solutions, concepts and designs obtained by equivalent substitutions or changes of the technical solutions and the inventive concepts of the present invention by those skilled in the art within the technical scope of the present invention shall be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a vegetable greenhouse irrigation equipment, includes the big-arch shelter body, its characterized in that, each rigid coupling in inside upper portion both sides of big-arch shelter body has an interior pond (16), interior pond (16) are connected with the water source, two install between interior pond (16) mounting bracket (11) that the level set up, be equipped with power running gear (19) between mounting bracket (11) both ends and interior pond (16), make mounting bracket (11) move along big-arch shelter length direction through power running gear (19), the last rigid coupling of mounting bracket (11) has water pump (18), a plurality of rotatory nozzle (17) are installed in mounting bracket (11) bottom suspension, water pump (18) water inlet end and interior pond (16) intercommunication, water pump (18) water outlet end communicates with rotatory nozzle respectively;
the rotary spray head comprises a top cover (5), the top cover (5) is fixedly connected with a mounting frame (11), the opening of the top cover (5) is downward, a blade water wheel (9) horizontally arranged is arranged in the top cover (5), the top surface of the blade water wheel (9) is coaxial and rotatably connected with a rotating shaft (10), the rotating shaft (10) is fixedly connected with the top wall of the top cover (5), an annular pipe (7) is arranged on the outer circumference of the top cover (5), the annular pipe (7) is communicated with the water outlet end of a water pump, a plurality of water inlet pipes (6) are fixedly connected with the inner circumference of the annular pipe (7) at equal angles, the other ends of the water inlet pipes (6) are fixedly connected with the outer circumference wall of the top cover (5), one end of each water inlet pipe (6) is communicated with the annular pipe (7), the other ends of the water inlet pipes (6) are communicated with the, the end part of each blade of the blade water wheel (9) is fixedly connected with a filter screen cover (8), and one side of the filter screen cover (8) close to the rotating shaft (10) is open;
the utility model discloses a water spraying device, including top cap (5), a conical section of thick bamboo (4), a plurality of hole for water spraying (3), a plurality of hole for water spraying (2), a plurality of hole for water spraying (5), a plurality of hole for water spraying (2) have been seted up to the less one end of conical section of thick bamboo (4) opening, the less one end of conical section of thick bamboo (4) opening is connected with can pivoted water spraying cover (2), water spraying cover (2) interior perisporium rigid coupling has and is used for promoting water spraying cover (2) pivoted acanthus (1) through rivers, the equiangular distribution of acanthus (1).
2. A vegetable greenhouse irrigation apparatus as claimed in claim 1, wherein two sides of the blade end of the blade water wheel (9) are fixedly connected with a strainer cover (8).
3. A vegetable greenhouse irrigation apparatus as claimed in claim 1, wherein the smaller opening end of the tapered cylinder (4) is integrally formed with a tapered extension portion (14), the smaller opening end of the tapered extension portion (14) is rotatably connected with the water spray cover (2), an annular collecting plate (12) is fixedly connected to the inner wall of the smaller opening end of the tapered extension portion (14), and a settling tank (13) is formed between the annular collecting plate (12) and the inner wall of the tapered extension portion (14).
4. A vegetable greenhouse irrigation apparatus as claimed in claim 1, wherein the roof of the greenhouse body is a herringbone structure, the upper part of the exterior of the greenhouse body is fixedly connected with an outer water pool (15) for receiving rainwater along the length direction, the outer water pool (15) is communicated with the inner water pool (16) through communication holes, and filter plates are installed in the communication holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011095198.8A CN112314268A (en) | 2020-10-14 | 2020-10-14 | Vegetable greenhouse irrigation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011095198.8A CN112314268A (en) | 2020-10-14 | 2020-10-14 | Vegetable greenhouse irrigation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112314268A true CN112314268A (en) | 2021-02-05 |
Family
ID=74314888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011095198.8A Pending CN112314268A (en) | 2020-10-14 | 2020-10-14 | Vegetable greenhouse irrigation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112314268A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201627785U (en) * | 2009-12-31 | 2010-11-10 | 广东联塑科技实业有限公司 | Current rotator for lifting-type buried sprinkler head driving device |
| CN204034899U (en) * | 2014-06-12 | 2014-12-24 | 上海华维节水灌溉有限公司 | The anti-stifled insect protected rotary nozzle of a kind of high evenness |
| CN104549811A (en) * | 2015-02-09 | 2015-04-29 | 刘燕 | Self-rotating type anti-blockage farmland water conservancy irrigation nozzle |
| CN107694778A (en) * | 2017-11-01 | 2018-02-16 | 费先艳 | The self-rotating nozzle irrigated for greening lawn |
| CN207700277U (en) * | 2017-12-12 | 2018-08-07 | 黄佑 | A kind of water pipeline exclusion device |
| CN108713426A (en) * | 2018-05-28 | 2018-10-30 | 安徽国川环境技术有限公司 | A kind of greenhouse irrigation system irrigation rig |
| CN110082873A (en) * | 2019-04-29 | 2019-08-02 | 宁波天韵通信设备有限公司 | Optical cable closes fine case |
-
2020
- 2020-10-14 CN CN202011095198.8A patent/CN112314268A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201627785U (en) * | 2009-12-31 | 2010-11-10 | 广东联塑科技实业有限公司 | Current rotator for lifting-type buried sprinkler head driving device |
| CN204034899U (en) * | 2014-06-12 | 2014-12-24 | 上海华维节水灌溉有限公司 | The anti-stifled insect protected rotary nozzle of a kind of high evenness |
| CN104549811A (en) * | 2015-02-09 | 2015-04-29 | 刘燕 | Self-rotating type anti-blockage farmland water conservancy irrigation nozzle |
| CN107694778A (en) * | 2017-11-01 | 2018-02-16 | 费先艳 | The self-rotating nozzle irrigated for greening lawn |
| CN207700277U (en) * | 2017-12-12 | 2018-08-07 | 黄佑 | A kind of water pipeline exclusion device |
| CN108713426A (en) * | 2018-05-28 | 2018-10-30 | 安徽国川环境技术有限公司 | A kind of greenhouse irrigation system irrigation rig |
| CN110082873A (en) * | 2019-04-29 | 2019-08-02 | 宁波天韵通信设备有限公司 | Optical cable closes fine case |
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Application publication date: 20210205 |