CN214838451U - Drainage flood fighting valve - Google Patents
Drainage flood fighting valve Download PDFInfo
- Publication number
- CN214838451U CN214838451U CN202120472956.7U CN202120472956U CN214838451U CN 214838451 U CN214838451 U CN 214838451U CN 202120472956 U CN202120472956 U CN 202120472956U CN 214838451 U CN214838451 U CN 214838451U
- Authority
- CN
- China
- Prior art keywords
- valve
- flood
- shaped flange
- drainage
- valve body
- 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.)
- Active
Links
Images
Landscapes
- Check Valves (AREA)
Abstract
The utility model discloses a drainage flood fighting valve has valve body bobbin spare, include: the valve body pipe barrel part is of a structure fixed with the movable hinge component by welding, the movable hinge component and the valve part are of a structure fixed by welding, and an integral complete product is manufactured; the complete product is suitable for underground pipe network main branch pipes or main pipeline water outlets for rainwater drainage on municipal roads in a certain urban area, and when flood occurs, the acting force of hydraulic potential pressure difference naturally generated inside and outside the 'valve' or the gravity of the self weight of the valve part in the no-rain period automatically opens or closes the W-shaped flange on the valve part to achieve the purposes of drainage and flood resistance.
Description
Technical Field
The utility model relates to a flood drainage and resistance valve, especially, be applicable to in the town area after certain planning, meet with the actual attack of torrential rain or especially big torrential rain, lead to the waterlogging into the calamity, utilize and lead to the rivers and lakes sea, border around the embankment of river basin, scientific planning builds thousand years water conservancy underground piping network engineering, the potential energy (promptly hydroenergy pressure differential) that the application natural phenomenon produced comes the automatic valve of opening and closing, on the underground pipe network of municipal administration road surface rainwater drainage is total or the total pipeline delivery port of branch, install this utility model a flood drainage and resistance valve, come to absorb and excrete the rainwater in the flood, become "the city sees the sea" the device of the automatic flood drainage and resistance valve of waterlogging of "sponge city" to see the sea ".
Background
Valves in widespread use today, such as: the conventional valves of gate valves, butterfly valves, ball valves, etc., have the following disadvantages: in the embodiment, the opening and the closing are operated by manual operation; the device is easy to freeze and damage in winter and open air, has complex mechanism and inconvenient installation and maintenance or is easy to damage; high cost, etc.
For another example, the intelligent electric valves widely used at present have the following disadvantages: in the embodiment, the intelligent controller is required to be used for carrying out electric operation and manual maintenance management when the intelligent controller is started and closed; installation and maintenance are inconvenient or easily damaged; investment costs are also high, etc.
At present, China still always encounters actual rainstorm or extra heavy rainstorm in many world regions year by year, and a few regions or an urban flood discharge system cannot react timely or is out of control, so that urban and rural waterlogging is caused, the 'waterfall' scene of sea and lake in urban areas is caused, house water inflow in residential areas and engine damage caused by vehicle submergence are caused, and civil aviation, high-speed rail, subway, highway and the like are greatly influenced.
Disclosure of Invention
The utility model aims at overcoming the not enough of existence among the prior art, providing a drainage flood fighting valve, for solving above-mentioned technical problem, the technical scheme of adoption is, has valve body bobbin part, include: the valve body pipe barrel part is of a structure fixed with the movable hinge component by welding, the movable hinge component and the valve part are of a structure fixed by welding, and an integral complete product is manufactured; the movable hinge member has a long shaft string rod, and the long shaft string rod is formed by connecting two-leaf right movable plates and three-leaf left movable plates in series on the long shaft string rod at intervals through a middle bushing, and then welding and fixing the two ends of the tip of the long shaft string rod and the two outer side surfaces of the three-leaf left movable plates to manufacture an integrated product of the piece 2.
The utility model aims at overcoming the defects in the prior art, providing a flood drainage and flood fighting valve, and in order to solve the technical problems, the technical proposal adopted is that the valve body pipe barrel part is provided with a pipeline, the pipeline and an M-shaped flange adopt a welded and fixed structure, the pipeline adopts a welded and fixed structure respectively through an external pressure load reinforcing ring plate, an external pressure load reinforcing rib plate A and an external pressure load reinforcing rib plate B, and a complete set product of an integrated piece 1 is manufactured; moreover, the joint of the M-shaped flange on the valve body pipe barrel part and the three-leaf left movable plate on the movable hinge component adopts a structural form of welding and fixing; and the external pressure load reinforcing rib plates A and B are respectively uniformly distributed on the outer circumference of the pipeline.
The utility model aims at overcoming the defects in the prior art and providing a flood drainage and fighting valve, which adopts the technical proposal that the valve component is provided with a W-shaped flange plate, the W-shaped flange plate and the joint of an external pressure load reinforcing channel steel and an external pressure load reinforcing rib plate adopt the welded and fixed structure respectively, and the integral product of the integral piece 3 is manufactured; moreover, the joint of the W-shaped flange on the valve component and the two-leaf right movable plate on the movable hinge component adopts a structural form of welding and fixing; and the W-shaped flange on the valve component and the geometric arc line at the contact surface of the M-shaped flange on the valve body pipe barrel component have the structure form of good fit.
The utility model aims at overcoming the not enough of existence among the prior art, providing a drainage flood fighting valve, for solving above-mentioned technical problem, the technical scheme of adoption is, include: when the nominal diameter DN of the pipeline B series is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange on the valve body pipe barrel part and the inner side surface of the right movable plate with two blades on the movable hinge component is respectively selected to be the structure form with S being more than or equal to 2-4 mm.
The utility model aims at overcoming the not enough of existence among the prior art, providing a drainage flood fighting valve, for solving above-mentioned technical problem, the technical scheme of adoption is, include: the complete product is suitable for underground pipe network main branch pipes or main pipeline water outlets for rainwater drainage on municipal roads in a certain urban area, and when flood occurs, the acting force of hydraulic potential pressure difference naturally generated inside and outside the 'valve' or the gravity of the self weight of the valve part in the no-rain period automatically opens or closes the W-shaped flange on the valve part to achieve the purposes of drainage and flood resistance.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a front view of a kit according to an embodiment of the present invention.
Fig. 2 is a top view of a kit according to an embodiment of the invention.
Fig. 3 is a right side view of a kit according to an embodiment of the invention.
Fig. 4 is a left side view of a kit according to an embodiment of the invention.
Fig. 5 is a sectional view a-a of fig. 1 and a '-a' of fig. 2, according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view B-B of fig. 1 in accordance with an embodiment of the present invention.
Fig. 7 is a partial enlarged view of the D-D cross-sectional view of fig. 3 according to an embodiment of the present invention.
Fig. 8 is a partial enlarged view of K in fig. 9 according to an embodiment of the present invention.
Fig. 9 is a cross-sectional view of the embodiment of the invention shown in fig. 3 with the variation of C-C closed.
Fig. 10 is a cross-sectional view of the embodiment of the present invention when the variation of C-C of fig. 3 is opened.
Fig. 11 is a complete set of products of the present invention, which is installed at the water outlet of the underground pipe network main branch or main pipe for draining rainwater on the municipal road surface in a certain urban area, when the water level in the underground pipe network main branch or main pipe outlet in the area is slightly higher than the water level of the riverbed of the great river, the lake or the main road, the change state diagram of the C-C section of fig. 3 is realized.
Fig. 12 is a schematic diagram of a state of change of C-C section of fig. 3, which is a complete set of products of the present invention, installed at the water outlet of the underground pipe network main branch or main pipe for draining rainwater on the municipal road surface in a certain urban area, when the water level in the underground pipe network main branch or main pipe outlet in the area is far lower than the water level in the riverbed of the great river, the lake or the main road.
Fig. 13 is a schematic diagram of a state of change of C-C section of fig. 3, which is a complete set of products of the present invention, installed at the water outlet of the underground pipe network main branch or main pipe for draining rainwater on municipal roads in a certain urban area, when the water level in the outlet of the underground pipe network main branch or main pipe in the area is far higher than the water level in the riverbed of a river, a lake or a main road.
Fig. 14 is the utility model discloses the complete set product of embodiment, installs in the underground pipe network main branch or the main pipeline water outlet department of municipal road surface rainwater drainage in certain town area, and the water level in the underground pipe network main branch or the main pipeline water outlet in the region does: in the rainless period, when the water level of the riverbed of the great river, the lake or the main road is lower than the outlet of the pipeline, the schematic diagram of the changing state of the C-C section of the figure 3 is realized.
In fig. 3: 2-1, long shaft string rod; 2-2. a lining; 2-3, a two-leaf right movable plate; 3-1. a W-shaped flange plate; 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.
In fig. 5: 1-3, externally pressing a load reinforcing ring plate; 1-4, externally pressing a load reinforcing rib plate A; and 1-5, externally pressing the load reinforcing rib plate B.
In fig. 6: 1-2. an M-shaped flange; 1-4, externally pressing a load reinforcing rib plate A; 1-5, externally pressing a load reinforcing rib plate B; 2-1, long shaft string rod; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; a W-shaped flange plate.
In fig. 7: 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.
In fig. 8: 1-1. a pipeline; 1-2. an M-shaped flange; 2-1, long shaft string rod; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; 3-1. a W-shaped flange plate; and 3-2, reinforcing the channel steel by external pressure load.
In fig. 9: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.
In fig. 10: 1-1. a pipeline; 1-2. an M-shaped flange; 1-3, externally pressing a load reinforcing ring plate; 1-4, externally pressing a load reinforcing rib plate A; 1-5, externally pressing a load reinforcing rib plate B; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; 3-1. a W-shaped flange plate; 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.
In fig. 11: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.
In fig. 12: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.
In fig. 13: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.
In fig. 14: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.
Detailed Description
As shown in fig. 1, 3, 9 and 10, the flood drainage and fighting valve of the present embodiment has a valve body tube part 1, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the movable hinge member 2 has a long shaft string rod 2-1, and the long shaft string rod 2-1 is formed by connecting a two-leaf right movable plate 2-3 and a three-leaf left movable plate 2-4 in series on the long shaft string rod 2-1 through a middle bushing 2-2 at intervals, and then welding and fixing the two ends of the tip of the long shaft string rod 2-1 and the two outer side surfaces of the three-leaf left movable plate 2-4 to manufacture an integrated product of the piece 2.
As shown in fig. 1, 5, 6, 9 and 10, the flood drainage and flood fighting valve of the present embodiment comprises a valve body and a pipe barrel part 1, wherein the valve body and the pipe barrel part 1 is provided with a pipe 1-1, the pipe 1-1 and an M-shaped flange 1-2 are welded and fixed, the pipe 1-1 is welded and fixed with an external pressure load reinforcing ring plate 1-3 and an external pressure load reinforcing rib plate a 1-4, and an external pressure load reinforcing rib plate b 1-5, respectively, to manufacture a complete product of an integrated piece 1; moreover, the joint of the M-shaped flange 1-2 on the valve body pipe barrel part 1 and the three-leaf left movable plate 2-4 on the movable hinge component 2 adopts a structural form of welding and fixing; and the external pressure load reinforcing rib plates A, B1-4 and B1-5 are respectively uniformly distributed on the outer circumference of the pipeline 1-1.
As shown in fig. 1, fig. 3, fig. 8, fig. 9 and fig. 10, the flood drainage and flood fighting valve according to the present embodiment includes a valve member 3 having a W-shaped flange 3-1, where the W-shaped flange 3-1, an external pressure load reinforcing channel 3-2 and an external pressure load reinforcing rib plate 3-3 are respectively welded and fixed at their joint portions, and a kit product of the integrated member 3 is manufactured; moreover, the joint of the W-shaped flange 3-1 on the valve component 3 and the two-leaf right movable plate 2-3 on the movable hinge component 2 adopts a welding and fixing structural form; and the W-shaped flange 3-1 on the valve component 3 and the geometric arc line at the contact surface of the M-shaped flange 1-2 on the valve body pipe barrel component 1 have the structure form of good fitting.
As shown in fig. 8, fig. 9 and fig. 10, the flood drainage and fighting valve according to this embodiment includes when the nominal diameter DN of the pipe 1-1B series is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange 1-2 on the valve body pipe barrel part 1 and the inner side surface of the two-leaf right movable plate 2-3 on the movable hinge component 2 is respectively selected to be not less than 2-4 mm.
As shown in figures 3, 9 and 10, the flood drainage and flood control valve of the embodiment comprises the complete product, and when a water conservancy network project is scientifically planned and built for thousands of years in a certain urban and rural area on the comprehensive plan, and flood drainage and flood control are realized when the actual attack of stormy rain and snow or extra-large stormy rain and snow is encountered and causes flood accumulation and disasters, the valve automatically opens or closes the valve member 3 to achieve the flood drainage and flood control purpose of the W-shaped flange plate 3-1 by utilizing the acting force of the pressure difference of the hydraulic power naturally generated inside and outside the valve member when flood drainage is performed or the gravity of the valve member 3 is free of the gravity of the valve member 3 during the no-rain period, and the acting force of the pressure difference of the hydraulic power naturally generated on the main trunk line bank of a lake (such as Zhejiang Min river, Wen Chi river, Wen river, Changjiang river, Zhujiang river basin, yellow river basin, Huajiang river basin, Hai river basin and the Hai river basin) and the like, the main trunk bank border of a main road bank of a glan lake (such as … …), and the underground pipe network main branch pipe network or the water outlet of the municipal road surface for draining the municipal road surface in the urban area can be suitable for drainage and can be drained when flood drainage and the valve member 3 can be automatically opened or the gravity of the W-shaped flange plate 3-1 for the flood control valve member 3-1 during the flood control valve member during flood control valve during flood control A kind of valve device which saves worry and energy.
As shown in fig. 1, 3 and 9, 10 and 11, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel part 1 having a valve body, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipeline for draining rainwater on municipal roads in a certain urban area, and is used for realizing the schematic diagram of the changing state of the C-C section of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipeline in the area is slightly higher than the water level of a riverbed of a river, a lake or a main road.
As shown in fig. 1, 3 and 9, 10 and 12, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel 1 having a valve body, and including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipe for draining rainwater on municipal roads in a certain urban area, and is used for realizing the schematic diagram of the changing state of the C-C section of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipe in the area is far lower than the water level of a riverbed of a great river, a lake or a main road.
As shown in fig. 1, 3 and 9, 10 and 13, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel part 1 having a valve body, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipeline for draining rainwater on municipal roads in a certain urban area, and is used for realizing the C-C section view change state schematic diagram of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipeline in the area is far higher than the water level of a riverbed of a great river, a lake or a main road.
As shown in fig. 1, 3 and 9, 10 and 14, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel 1 having a valve body, and including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; this complete set product is applicable to the underground pipe network total branch pipe or the total pipeline delivery port department of municipal road surface rainwater drainage in a certain town area, and the water level in the underground pipe network total branch pipe or the total pipeline delivery port is in the region: in the rainless period, when the water level of the riverbed of the great river, the lake or the main road is lower than the outlet of the pipeline, the schematic diagram of the changing state of the C-C section of the figure 3 is realized.
Further, as shown in fig. 8 and 9, the flood drainage and fighting valve of the present embodiment includes the following B-series specification and size table (one).
Claims (5)
1. A flood drainage and flood fighting valve having a valve body cartridge part (1), characterized by comprising: the valve body pipe barrel part (1) is in a structure fixed with the movable hinge component (2) in a welding way, the movable hinge component (2) is in a structure fixed with the valve part (3) in a welding way, and a complete set product forming a whole is manufactured; the movable hinge component (2) is provided with a long shaft tandem rod (2-1), the long shaft tandem rod (2-1) is formed by respectively connecting a two-leaf right movable plate (2-3) and a three-leaf left movable plate (2-4) on the long shaft tandem rod (2-1) in series at intervals through a middle bushing (2-2), and then welding and fixing the two ends of the tail end of the long shaft tandem rod (2-1) and the two outer side surfaces of the three-leaf left movable plate (2-4) to manufacture a complete product of the integral piece (2).
2. A flood drainage and fighting valve according to claim 1, characterized in that said valve body tube member (1), having a conduit (1-1), comprises: the pipeline (1-1) and the M-shaped flange (1-2) are fixedly welded, and the pipeline (1-1) is fixedly welded with an external pressure load reinforcing ring plate (1-3), an external pressure load reinforcing rib plate A (1-4) and an external pressure load reinforcing rib plate B (1-5) respectively, so that a complete product of the integrated part 1 is manufactured; moreover, the joint of the M-shaped flange (1-2) on the valve body pipe barrel part (1) and a three-leaf left movable plate (2-4) on the movable hinge component (2) adopts a welding and fixing structural form; and the external pressure load reinforcing rib plates A (1-4) and B (1-5) are respectively uniformly distributed on the outer circumference of the pipeline (1-1).
3. A flood drainage and fighting valve according to claim 1, characterized in that said valve member (3), having a W-shaped flange (3-1), comprises: the joint parts of the W-shaped flange plate (3-1) and the external pressure load reinforcing channel steel (3-2) and the external pressure load reinforcing rib plate C (3-3) are respectively welded and fixed, and a complete product of the integrated piece 3 is manufactured; moreover, the joint of the W-shaped flange (3-1) on the valve component (3) and the two-leaf right movable plate (2-3) on the movable hinge component (2) adopts a structural form of welding and fixing; and the W-shaped flange (3-1) on the valve component (3) and the geometric arc line at the contact surface of the M-shaped flange (1-2) on the valve body pipe barrel component (1) have the structure form of good fit.
4. A flood drainage and fighting valve according to claim 2, characterized in that when the nominal diameter DN of said series B of pipes (1-1) is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange (1-2) on the valve body pipe barrel part (1) and the inner side surface of the two-leaf right movable plate (2-3) on the movable hinge component (2) is respectively selected to be the structure form that S is more than or equal to 2-4 mm.
5. A flood drainage and fighting valve as claimed in claim 1, wherein said kit is adapted to: on the water outlet of a general branch pipe or a general pipeline of an underground pipe network for rainwater drainage of municipal roads in a certain urban area, the W-shaped flange (3-1) on the valve part (3) is automatically opened or closed to fulfill the aims of drainage and flood fighting by acting force of hydraulic potential energy pressure difference naturally generated inside and outside the valve during flood or gravity of the self weight of the valve part (3) during a no-rain period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120472956.7U CN214838451U (en) | 2021-02-28 | 2021-02-28 | Drainage flood fighting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120472956.7U CN214838451U (en) | 2021-02-28 | 2021-02-28 | Drainage flood fighting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214838451U true CN214838451U (en) | 2021-11-23 |
Family
ID=78884693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120472956.7U Active CN214838451U (en) | 2021-02-28 | 2021-02-28 | Drainage flood fighting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214838451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815099A (en) * | 2021-02-28 | 2021-05-18 | 潘泉方 | Drainage flood fighting valve |
-
2021
- 2021-02-28 CN CN202120472956.7U patent/CN214838451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815099A (en) * | 2021-02-28 | 2021-05-18 | 潘泉方 | Drainage flood fighting valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532796B (en) | The rubber dam of a kind of wear-resistant steel plate of self-control type band | |
| CN2905896Y (en) | Float box type automatic gate | |
| CN106836439B (en) | Emergency self-opening device | |
| CN214838451U (en) | Drainage flood fighting valve | |
| CN204343257U (en) | The rubber dam of the wear-resistant steel plate of a kind of autocontrol band | |
| CN206418566U (en) | A kind of discharge structure of automatic utilization sewage conduct assisted drainage | |
| CN105220612A (en) | A kind of bridge rain water collecting system | |
| CN104018569B (en) | Prevent the draining four-way manhole of opposite jet flow | |
| CN212958756U (en) | Intelligent water drainage pressure reducing device for water-rich tunnel | |
| CN210086460U (en) | Hydraulic rotating weir gate, diversion well provided with weir gate and control system of diversion well | |
| CN207633479U (en) | A kind of urban underground water drainage pipe current-limiting mechanism | |
| CN213926618U (en) | A prevent flowing backward sewage vatch basin structure for coastal area | |
| CN214423534U (en) | Intelligent sewage intercepting well of overturning weir | |
| CN210013303U (en) | Connecting structure for new and old sewage pipelines | |
| CN201411670Y (en) | Sensing type self-energy-dissipating pressureless water drainage system for earth-rockfill dams | |
| CN203866950U (en) | Drainage four-way inspection well for preventing water flow opposite flowing | |
| CN109208693B (en) | Water taking and draining device for high-dam reservoir engineering | |
| CN201891107U (en) | One-way water flowing hydraulic intercepting facility capable of controlling highest water level of downstream | |
| CN112815099A (en) | Drainage flood fighting valve | |
| CN207109987U (en) | A kind of hondo formula closure works system | |
| CN204829116U (en) | Drip irrigation preventing stifled joint that soil amelioration used under saline and alkaline plastic film | |
| CN205935171U (en) | Slab formula rainwater detention pond | |
| CN210917653U (en) | Automatic drainage rainwater inspection well structure applied to coastal area | |
| CN213508273U (en) | Novel ecological portable retaining dam | |
| CN211523436U (en) | Combined type vatch basin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |