CN104947676A - Offshore grouting leakage preventing structure and method - Google Patents
Offshore grouting leakage preventing structure and method Download PDFInfo
- Publication number
- CN104947676A CN104947676A CN201510374717.7A CN201510374717A CN104947676A CN 104947676 A CN104947676 A CN 104947676A CN 201510374717 A CN201510374717 A CN 201510374717A CN 104947676 A CN104947676 A CN 104947676A
- Authority
- CN
- China
- Prior art keywords
- grouting
- pipe
- outer tube
- seal diaphragm
- seal
- 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.)
- Granted
Links
Abstract
The invention discloses an offshore grouting leakage preventing structure and method. The offshore grouting leakage preventing structure comprises a grouting outer pipe, a grouting inner pipe and a sealing partition plate, wherein one end of the grouting inner pipe stretches into the grouting outer pipe, an annular grouting channel is formed between the outer wall of the grouting inner pipe and the inner wall of the grouting outer pipe, a seal ring used for sealing and blocking the grouting channel is arranged between the grouting inner pipe and the grouting outer pipe, the sealing partition plate is arranged at one side, away from the grouting channel, of the seal ring and provided with at least one vent hole, and a net-shaped grid is arranged in each vent hole. The offshore grouting leakage preventing method includes the following steps that the seal ring is fixed outside the grouting inner pipe; the sealing partition plate is fixed in the grouting outer pipe; after pile sinking of the grouting outer pipe reaches the design elevation, the grouting inner pipe stretches into the grouting outer pipe and grouts mortar into the grouting channel. The offshore grouting leakage preventing structure and method can effectively ensure smooth construction of an offshore wind turbine foundation.
Description
Technical field
The present invention relates to field of ocean engineering, particularly a kind of marine grouting seal structure and marine grouting anti-leaking method.
Background technology
At present, offshore wind farm is because of advantages such as it are clean, safety, development efficiency are high, and in new energy field, development rapidly, and the basic engineering of offshore wind turbine is one of them important content.At present, in the foundation pattern of various blower fan, the foundation pattern such as jacket, under water three and three waterborne is used widely.Wherein, grouting linkage section is key one ring of taking over from the past and setting a new course for the future in whole construction link, is also the stressed key structure formed a connecting link of whole braced structures.Therefore, design and the construction of grouting linkage section are very crucial, and the price of grouting agent is higher in addition, and strictly need control the quality of grouting construction, be especially in the milk hermetically-sealed construction.According to existing grouting seal approach, even if construct in strict accordance with requiring execution, when construction operation in enormous quantities, the situation that grouting hermetically-sealed construction lost efficacy still happens occasionally, so improve the reliability of grouting sealing, being the key factor ensureing offshore wind turbine foundation smooth construction, is also the Reliable guarantee improving offshore construction installation effectiveness.
Summary of the invention
Based on this, the invention reside in the defect overcoming prior art, a kind of sea of good airproof performance grouting seal structure and marine grouting anti-leaking method are provided, can effective guarantee offshore wind turbine foundation smooth construction, be particularly useful for that grouting amount is large, the unmanageable situation of grouting quality.
Its technical scheme is as follows:
A kind of marine grouting seal structure, comprise pipe, seal diaphragm in grouting outer tube, grouting, in described grouting, one end of pipe is stretched in grouting outer tube, in described grouting, the outer wall of pipe and the inwall of grouting outer tube form the grouting channel of ring-type, the sealing ring for grouting channel described in shutoff is provided with between pipe and grouting outer tube in described grouting, described seal diaphragm is arranged on the side of sealing ring away from described grouting channel, described seal diaphragm is provided with at least one air vent, is provided with mesh grille in described air vent.
Wherein in an embodiment, described sealing ring is set on the outer wall of pipe in grouting, and described seal diaphragm is fixed on the inwall of grouting outer tube.
Wherein in an embodiment, described seal diaphragm is welded on the inwall of grouting outer tube.
Wherein in an embodiment, described seal diaphragm is arranged on the position of 100-300mm below grouting inner tube outlet.
Wherein in an embodiment, described air vent is one, and this air vent is positioned at the center of seal diaphragm, and described air vent is circular or square.
Wherein in an embodiment, the maximum size of described mesh grille is less than the maximum size of grouting agent self-healing permission.
Wherein in an embodiment, described sealing ring comprises fixed muffle and plugging hood, and described plugging hood is connected to the port of fixed muffle, and described fixed muffle to be bolted in described grouting on pipe by some.
Wherein in an embodiment, the end of described bolt is also provided with protection pad.
The present invention also provides a kind of marine grouting anti-leaking method, comprises the following steps:
Sealing ring is fixed on outside the interior pipe of grouting;
Seal diaphragm is fixed in grouting outer tube;
After grouting outer tube pile sinking to design altitude;
Pipe in grouting to be stretched in grouting outer tube and to be in the milk in grouting channel.
Described sea grouting anti-leaking method specifically comprises the following steps:
Stretch into the length of grouting outer tube according to pipe in grouting, seal diaphragm is fixed on the position of 100-300mm below grouting inner tube outlet.
Below the advantage of preceding solution or principle are described:
Above-mentioned sea grouting seal structure and marine grouting anti-leaking method, double-layered anti-leakage is realized by sealing ring and seal diaphragm, when being in the milk in grouting channel, sealing ring realizes the first sealing and anti-leakage of grouting agent, if the sealing effectiveness of sealing ring is intact, seal diaphragm will not play sealing function, only have the effect improving grouting outer tube intensity.If the sealing performance of sealing ring because of work progress a variety of causes local or total loss, grouting agent will leak on seal diaphragm, the air vent of seal diaphragm is provided with mesh grille, there is a small amount of grouting agent down can be leaked by mesh grille at first, because grouting agent has certain self-healing capability, these mesh grilles can be blocked by grouting agent at leisure, and seal diaphragm plays leak preventing effect immediately.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sea grouting seal structure described in the embodiment of the present invention;
Fig. 2 is the enlarged diagram at A place in Fig. 1;
Fig. 3 is the structural representation of the seal diaphragm described in the embodiment of the present invention.
Description of reference numerals:
1, be in the milk outer tube, and 2, pipe in grouting, 3, seal diaphragm, 4, sealing ring, 5, bolt, 6, protection pad, 10, grouting channel, 30, air vent, 31, mesh grille, 40, fixed muffle, 41, plugging hood.
Detailed description of the invention
Below embodiments of the invention are described in detail:
As Fig. 1, shown in 3, sea grouting seal structure described in the present embodiment, comprise grouting outer tube 1, pipe 2 in grouting, seal diaphragm 3, in described grouting, one end of pipe 2 is stretched in grouting outer tube 1, in described grouting, the outer wall of pipe 2 and the inwall of grouting outer tube 1 form the grouting channel 10 of ring-type, the sealing ring 4 for grouting channel described in shutoff 10 is provided with between pipe 2 and grouting outer tube 1 in described grouting, described seal diaphragm 3 is arranged on the side of sealing ring 4 away from described grouting channel 10, described seal diaphragm 3 is provided with at least one air vent 30, mesh grille 31 is provided with in described air vent 30.
The present embodiment also provides a kind of marine grouting anti-leaking method, comprises the following steps:
Sealing ring 4 is fixed on outside the interior pipe 2 of grouting;
Seal diaphragm 3 is fixed in grouting outer tube 1;
After grouting outer tube 1 pile sinking to design altitude;
Pipe 2 in grouting to be stretched in grouting outer tube 1 and towards grouting in grouting channel 10.
Above-mentioned sea grouting seal structure and marine grouting anti-leaking method, double-layered anti-leakage is realized by sealing ring 4 and seal diaphragm 3, when being in the milk in grouting channel 10, sealing ring 4 realizes the first sealing and anti-leakage of grouting agent, if the sealing effectiveness of sealing ring 4 is intact, seal diaphragm 3 will not play sealing function, only have the effect improving grouting outer tube 1 intensity.If the sealing performance of sealing ring 4 because of work progress a variety of causes local or total loss, grouting agent will leak on seal diaphragm 3, the air vent 30 of seal diaphragm 3 is provided with mesh grille 31, there is a small amount of grouting agent down can be leaked by mesh grille 31 at first, because grouting agent has certain self-healing capability, these mesh grilles 31 can be blocked by grouting agent at leisure, and seal diaphragm 3 plays leak preventing effect immediately.
As shown in Figure 2, first, by land in processing factory, sealing ring 4 is set on the outer wall of pipe 2 in grouting, and is fixed in described grouting on pipe 2 by some bolts 5, wherein, sealing ring 4 comprises integrated fixed muffle 40 and plugging hood 41, fixed muffle 40 is for being fixed by socket, and plugging hood 41 is connected to the port of fixed muffle 40, for plugging grouting path 10.The end of bolt 5 is also provided with protection pad 6, in order to avoid bolt 5 is damaged in installation process.
As shown in Figure 3, seal diaphragm 3 is also welded on the inwall of grouting outer tube 1 in the processing factory of land, solid and reliable.The position that seal diaphragm 3 welds need be determined according to the length of grouting interior pipe 2 insertion grouting outer tube 1, and preferably, seal diaphragm 3 is arranged on the position of 100-300mm below pipe 2 outlet in grouting, and distance should not be excessive, in order to avoid the grouting agent of consume increases; Also should be not too small, cross the impact that young pathbreaker causes offsetting piling vertical error.
As shown in Figure 1, when be in the milk outer tube 1 pile sinking time, have air and seawater up springs up, the air vent 30 of seal diaphragm 3 now may be used for discharging air and seawater.When after grouting outer tube 1 pile sinking to design altitude, the blower foundation comprising pipe 2 in grouting is inserted in grouting outer tube 1, after blower foundation is in place, starts to carry out grouting construction to it.
If the sealing effectiveness of sealing ring 4 is intact, seal diaphragm 3 will not play sealing function, only have the effect improving grouting outer tube 1 intensity.If the sealing performance of sealing ring 4 because of work progress a variety of causes local or total loss, grouting agent will leak on seal diaphragm 3, the air vent 30 of seal diaphragm 3 is provided with mesh grille 31, there is a small amount of grouting agent down can be leaked by mesh grille 31 at first, because grouting agent has certain self-healing capability, these mesh grilles 31 can be blocked by grouting agent at leisure, and seal diaphragm 3 plays leak preventing effect immediately.
In the present embodiment, described air vent 30 is one, and this air vent 30 is positioned at the center of seal diaphragm 3, and described air vent 30 is circular or square.Understandable, the difformity of the air vent 30 of different number, the different setting position of air vent 30 and air vent 30 all should in protection scope of the present invention.In addition, the maximum size of described mesh grille 31 need be less than the maximum size of grouting agent self-healing permission, prevents grouting agent from mesh grille 31, occurring the situation that can not heal.In other embodiments, multi-layer sealed circle 4 and/or multi-layer sealed dividing plate 3 also can be set, but the cost of sealing ring 4 and seal diaphragm 3 is high, the single sealing ring 4 described in the present embodiment and the economy of single seal diaphragm 3 more excellent.
For offshore construction, if leakproof is improper, not only wastes expensive high-strength fill material, also can affect expense of dispatching and the duration of workboat machine equipment, the present invention is that marine grouting provides dual safety guarantee, and its beneficial effect brought is remarkable.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this manual is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a marine grouting seal structure, it is characterized in that, comprise pipe, seal diaphragm in grouting outer tube, grouting, in described grouting, one end of pipe is stretched in grouting outer tube, in described grouting, the outer wall of pipe and the inwall of grouting outer tube form the grouting channel of ring-type, the sealing ring for grouting channel described in shutoff is provided with between pipe and grouting outer tube in described grouting, described seal diaphragm is arranged on the side of sealing ring away from described grouting channel, described seal diaphragm is provided with at least one air vent, is provided with mesh grille in described air vent.
2. grouting seal structure in sea according to claim 1, it is characterized in that, described sealing ring is set on the outer wall of pipe in grouting, and described seal diaphragm is fixed on the inwall of grouting outer tube.
3. grouting seal structure in sea according to claim 2, it is characterized in that, described seal diaphragm is welded on the inwall of grouting outer tube.
4. grouting seal structure in sea according to claim 2, it is characterized in that, described seal diaphragm is arranged on the position of 100-300mm below grouting inner tube outlet.
5. grouting seal structure in sea according to claim 1, it is characterized in that, described air vent is one, and this air vent is positioned at the center of seal diaphragm, and described air vent is circular or square.
6. grouting seal structure in sea according to claim 1, it is characterized in that, the maximum size of described mesh grille is less than the maximum size of grouting agent self-healing permission.
7. the sea grouting seal structure according to any one of claim 1-6, it is characterized in that, described sealing ring comprises fixed muffle and plugging hood, and described plugging hood is connected to the port of fixed muffle, and described fixed muffle to be bolted in described grouting on pipe by some.
8. grouting seal structure in sea according to claim 7, it is characterized in that, the end of described bolt is also provided with protection pad.
9. a marine grouting anti-leaking method, is characterized in that, comprise the following steps:
Sealing ring is fixed on outside the interior pipe of grouting;
Seal diaphragm is fixed in grouting outer tube;
After grouting outer tube pile sinking to design altitude;
Pipe in grouting to be stretched in grouting outer tube and to be in the milk in grouting channel.
10. grouting anti-leaking method in sea according to claim 9, is characterized in that, specifically comprise the following steps:
Stretch into the length of grouting outer tube according to pipe in grouting, seal diaphragm is fixed on the position of 100-300mm below grouting inner tube outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374717.7A CN104947676B (en) | 2015-06-29 | 2015-06-29 | Offshore grouting leakage preventing structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374717.7A CN104947676B (en) | 2015-06-29 | 2015-06-29 | Offshore grouting leakage preventing structure and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104947676A true CN104947676A (en) | 2015-09-30 |
| CN104947676B CN104947676B (en) | 2017-03-22 |
Family
ID=54162694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510374717.7A Active CN104947676B (en) | 2015-06-29 | 2015-06-29 | Offshore grouting leakage preventing structure and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104947676B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604084A (en) * | 2016-03-02 | 2016-05-25 | 福建省水利水电勘测设计研究院 | Underwater high-pressure grouting connecting structure for offshore wind turbine foundation steel pipe pile and transition section and installation process of underwater high-pressure grouting connecting structure |
| CN107268665A (en) * | 2017-07-27 | 2017-10-20 | 浙江华蕴海洋工程技术服务有限公司 | The sealing device and encapsulating method of marine fan jacket foundation |
| CN108708686A (en) * | 2018-08-21 | 2018-10-26 | 天津熙盛科技发展有限公司 | A kind of passive type has the underwater packer of diminution gap function |
| CN108930282A (en) * | 2018-08-01 | 2018-12-04 | 中国能源建设集团广东省电力设计研究院有限公司 | More connection structures, the construction method of offshore support structure and offshore support structure |
| CN111560936A (en) * | 2020-07-13 | 2020-08-21 | 东营金联建筑工程有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
| JP2020172818A (en) * | 2019-04-12 | 2020-10-22 | 五洋建設株式会社 | Method for repairing steel pipe pile |
| CN111910672A (en) * | 2020-07-27 | 2020-11-10 | 浙江大学 | Device and method for monitoring grouting sleeve of offshore wind turbine and guaranteeing operation safety |
| CN113356214A (en) * | 2021-06-04 | 2021-09-07 | 中交第三航务工程局有限公司江苏分公司 | Grouting bottom sealing method for offshore wind turbine jacket foundation structure |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4804018A (en) * | 1987-10-30 | 1989-02-14 | Mcdermott International, Inc. | Grouted closure assembly |
| CN102373711A (en) * | 2010-08-20 | 2012-03-14 | 希尔格福特系统和设备股份有限公司 | Base structure for off-shore wind turbines and method for building the same |
| JP2012077533A (en) * | 2010-10-04 | 2012-04-19 | Shimizu Corp | Filling concrete leakage prevention structure |
| CN103233481A (en) * | 2013-04-17 | 2013-08-07 | 广东明阳风电产业集团有限公司 | Jacket support structure capable of being connected through grouting |
| CN103437372A (en) * | 2013-08-13 | 2013-12-11 | 广东明阳风电产业集团有限公司 | Connecting structure for jacket foundation and underwater pile foundation of offshore wind turbine and grouting method |
| WO2014090361A1 (en) * | 2012-12-14 | 2014-06-19 | Repower Systems Se | Method for anchoring a foundation structure, and foundation structure |
| CN103967036A (en) * | 2014-05-07 | 2014-08-06 | 中国水电顾问集团华东勘测设计研究院有限公司 | Pile and sleeve grouting connecting structure for offshore wind power generation and construction method thereof |
| CN104532848A (en) * | 2014-12-29 | 2015-04-22 | 广州华申建设工程管理有限公司 | Underwater dry grouting component for offshore wind power and implementation method thereof |
| CN104594317A (en) * | 2015-01-13 | 2015-05-06 | 江苏金风科技有限公司 | Working platform, single pile foundation, offshore working platform and installing method of offshore working platform |
| CN204780931U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Marine grout leak protection structure |
-
2015
- 2015-06-29 CN CN201510374717.7A patent/CN104947676B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4804018A (en) * | 1987-10-30 | 1989-02-14 | Mcdermott International, Inc. | Grouted closure assembly |
| CN102373711A (en) * | 2010-08-20 | 2012-03-14 | 希尔格福特系统和设备股份有限公司 | Base structure for off-shore wind turbines and method for building the same |
| JP2012077533A (en) * | 2010-10-04 | 2012-04-19 | Shimizu Corp | Filling concrete leakage prevention structure |
| WO2014090361A1 (en) * | 2012-12-14 | 2014-06-19 | Repower Systems Se | Method for anchoring a foundation structure, and foundation structure |
| CN103233481A (en) * | 2013-04-17 | 2013-08-07 | 广东明阳风电产业集团有限公司 | Jacket support structure capable of being connected through grouting |
| CN103437372A (en) * | 2013-08-13 | 2013-12-11 | 广东明阳风电产业集团有限公司 | Connecting structure for jacket foundation and underwater pile foundation of offshore wind turbine and grouting method |
| CN103967036A (en) * | 2014-05-07 | 2014-08-06 | 中国水电顾问集团华东勘测设计研究院有限公司 | Pile and sleeve grouting connecting structure for offshore wind power generation and construction method thereof |
| CN104532848A (en) * | 2014-12-29 | 2015-04-22 | 广州华申建设工程管理有限公司 | Underwater dry grouting component for offshore wind power and implementation method thereof |
| CN104594317A (en) * | 2015-01-13 | 2015-05-06 | 江苏金风科技有限公司 | Working platform, single pile foundation, offshore working platform and installing method of offshore working platform |
| CN204780931U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Marine grout leak protection structure |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604084A (en) * | 2016-03-02 | 2016-05-25 | 福建省水利水电勘测设计研究院 | Underwater high-pressure grouting connecting structure for offshore wind turbine foundation steel pipe pile and transition section and installation process of underwater high-pressure grouting connecting structure |
| CN107268665A (en) * | 2017-07-27 | 2017-10-20 | 浙江华蕴海洋工程技术服务有限公司 | The sealing device and encapsulating method of marine fan jacket foundation |
| CN108930282A (en) * | 2018-08-01 | 2018-12-04 | 中国能源建设集团广东省电力设计研究院有限公司 | More connection structures, the construction method of offshore support structure and offshore support structure |
| CN108708686A (en) * | 2018-08-21 | 2018-10-26 | 天津熙盛科技发展有限公司 | A kind of passive type has the underwater packer of diminution gap function |
| JP2020172818A (en) * | 2019-04-12 | 2020-10-22 | 五洋建設株式会社 | Method for repairing steel pipe pile |
| CN111560936A (en) * | 2020-07-13 | 2020-08-21 | 东营金联建筑工程有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
| CN111560936B (en) * | 2020-07-13 | 2020-09-25 | 东营金联建筑工程有限公司 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
| CN111910672A (en) * | 2020-07-27 | 2020-11-10 | 浙江大学 | Device and method for monitoring grouting sleeve of offshore wind turbine and guaranteeing operation safety |
| CN113356214A (en) * | 2021-06-04 | 2021-09-07 | 中交第三航务工程局有限公司江苏分公司 | Grouting bottom sealing method for offshore wind turbine jacket foundation structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104947676B (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104947676A (en) | Offshore grouting leakage preventing structure and method | |
| CN204780931U (en) | Marine grout leak protection structure | |
| CN104912029B (en) | Assembling type mobile anti-flood wall | |
| CN202970602U (en) | Plugging structure of high-rise building deep foundation pit large water volume tube well | |
| US10731624B2 (en) | Tidal power generation and storage system and method of constructing a reservoir for such a system | |
| CN107873597A (en) | A kind of HDPE gravity type wind wave-resisting net casing systems of remote controlled lifting | |
| WO2022252585A1 (en) | High-standing grid-format offshore wind power foundation anti-scouring system and method | |
| CN206053970U (en) | A kind of portal water sealing structure for shield jacking construction | |
| CN201576899U (en) | Integral-type underground high-voltage power transformation equipment | |
| CN103898997A (en) | Automatic regulating device with water stopping and water draining functions and regulating method thereof | |
| CN205894519U (en) | Structure of waterproof parapet of roofing stainless steel and open drain combination | |
| CN204592840U (en) | Reverse bucket type steam drain valve | |
| CN103821116B (en) | A kind of power station tonifying Qi water-tight device | |
| CN209722910U (en) | A kind of device of temporary plugging diversion tunnel barrel gate pit shaft | |
| CN109371930B (en) | Bulb-shaped dirt blocking structure of sewer pipeline | |
| CN101737894A (en) | Ventilating system of ultra-deep topdown construction method construction operation environment | |
| CN218116994U (en) | Ventilation pipe outgoing-free roof structure | |
| CN101771244B (en) | Integral-type underground high-voltage transformation equipment | |
| CN101476335A (en) | Energy-saving emission-reduction environment-friendly sanitary waterproof airtight and fire resistant well loop, well cover and its implementing method | |
| CN206323248U (en) | Cold water inlet flange leakage hydrogen device for plugging is determined at the top of a kind of generator | |
| CN104775398A (en) | Box tube type basic siphon corridor water taking structure and application thereof | |
| CN106329810B (en) | Cold water inlet flange leakage hydrogen device for plugging and its blocking method are determined at the top of a kind of generator | |
| CN109853495A (en) | A kind of method and device of temporary plugging diversion tunnel barrel gate pit shaft | |
| CN202925517U (en) | Immediate processing device of high-flow water leakage hole in concrete | |
| CN213208259U (en) | Waterproof sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |