CN104806843B - Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method - Google Patents
Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method Download PDFInfo
- Publication number
- CN104806843B CN104806843B CN201510106906.6A CN201510106906A CN104806843B CN 104806843 B CN104806843 B CN 104806843B CN 201510106906 A CN201510106906 A CN 201510106906A CN 104806843 B CN104806843 B CN 104806843B
- Authority
- CN
- China
- Prior art keywords
- steel cylinder
- mortar
- layer
- steel
- steel wire
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to a steel cylinder mesh suspended mortar spray compound lining and a pressure pipe non-excavation repair method to be used for performing non-excavation repair on old pressure pipes and culverts, with the diameters being more than 0.8m, which cannot bear established work pressure. The compound lining is formed by a two-layer structure of a steel cylinder layer and a steel wire mesh reinforcement mortar layer from the outside to the inside. A steel cylinder of the steel cylinder layer is arranged on the inside of an oil pipe inner mortar bottom layer, and the mortar bottom layer is sprayed on the cleaned old pipe inner wall during repair directly. A steel wire mesh is covered by the steel wire mesh reinforcement mortar layer and is welded and anchored in the steel cylinder of the steel cylinder layer, and mortar of certain thickness is sprayed on the surfaces of the steel cylinder and the steel wire mesh to form the steel wire mesh reinforcement mortar layer. The two layers of structures are fixedly connected to form the steel cylinder mesh suspended mortar spray compound lining. By applying the method, non-excavation repair of old pipes can be achieved, and the pipe pressure operation and prolonging of the pipe service life can be achieved without reducing the pipe cross section apparently.
Description
Technical field
The present invention relates to a kind of method of steel cylinder linked network spraying mortar compound lining and pressure pipeline non-excavation rehabilitation, letter
Claim：SC-RCP technologies, specifically a kind of pressure pipeline for set operating pressure, more than diameter 0.8m cannot be undertaken
（Contain）Carry out non-excavation rehabilitation with steel cylinder linked network spraying mortar compound lining and the side of non-excavation rehabilitation is carried out to pressure pipeline
Method.
Background technology
At present, China have substantial amounts of major diameter have pressure conduit pipe, originally water conduit tube, water conservancy culvert, have pressure water pipe, heat
The pipelines such as power, after a long time use, the Frequent Accidents such as seepage, booster, pipeline can not the safe operation under set operating pressure,
Need badly and repaired；These large-diameter pipelines mostly are concrete reinforced pipe and metal tube.Currently for the pressure of this two classes material
Pipeline, relatively feasible non-excavation rehabilitation scheme is：The plastic tube or metal tube of minor diameter, this kind of scheme are inserted in old pipeline
It is maximum the disadvantage is that, the pipeline of new insertion can cause old pipeline flow section significantly to reduce, cause the pipeline excessively stream after repairing
Scarce capacity；And new plastic tube or metal tube is inserted in large-diameter pipeline, difficulty of construction is very big.
The content of the invention
The invention aims to overcome problems of the prior art, and provide a kind of for repairing pressure pipeline
Steel cylinder linked network spraying mortar compound lining, and one kind be provided be combined in steel cylinder linked network spraying mortar under the conditions of no-dig technique
Liner is used for the method for repairing pressure pipeline, using the method for the compound lining and pressure pipeline non-excavation rehabilitation of the present invention, can
On the premise of pipeline flow section is not reduced significantly, the ability of the anti-internal pressure of pipeline is improved, while extending pipeline service life.
To reach above-mentioned purpose, the technical measures that the present invention is adopted are：A kind of pressure pipeline non-excavation rehabilitation is provided
Steel cylinder linked network sprays mortar compound lining, is provided with steel wire reinforced mortar layer, is additionally provided with steel cylinder layer, and described compound lining is from outer
It is made up of steel cylinder layer and steel wire reinforced mortar layer double-layer structure to interior；The steel cylinder of described steel cylinder layer is arranged on to be repaired old
Mortar prime coat inner side, in described steel wire reinforced mortar layer steel wire is enclosed with pipeline, and steel wire is by weld anchor
Gu on the inside of the steel cylinder of steel cylinder layer, then the mortar of requirement thickness is sprayed by design in steel cylinder, steel wire net surface；Described steel cylinder layer
It is consolidated with steel wire reinforced mortar layer double-layer structure and constitutes steel cylinder linked network spraying mortar compound lining for force pipe
Road non-excavation rehabilitation.
A diameter of more than 0.8m of the pressure pipeline of described non-excavation rehabilitation.
The steel wire in steel cylinder and steel wire reinforced mortar layer in described steel cylinder layer should adopt the common of phase same material
Steel or stainless steel, using antirust treatment should be carried out during common iron.
The present invention also provides a kind of using above-mentioned steel cylinder linked network spraying mortar compound lining pressure pipeline non-excavation rehabilitation
Method, carry out thoroughly cleaning to old pipeline inside first, and remove its internal clast, silt and raised hard fulcrum；Again
Implement as follows：
Step sprays mortar (1), using centrifugal spraying device or hand spray mode in the old pipeline inner wall construction for cleaning
Prime coat, makes inner-walls of duct rounding, without raised hard fulcrum；
The internal diameter of the old pipeline that (2), by steel plate step repairs on demand is pre-machined into a section section pipe；
Step (3), after (1) step sprays mortar bottoming formable layer, by pipe send into old pipeline predetermined interior position, support
Open, make outer surface of tube blank together with spraying mortar prime coat and being brought into close contact, will form complete after the pipe welded closed for strutting
One section steel cylinder section；Again each section steel cylinder section is weldingly connected into into the continuous steel cylinder pipeline of a whole piece along pipe lengths, and is pacified
It is attached to position；
Step (4), the steel wire of selected specification welded on request anchor to whole piece steel cylinder inner-walls of duct；
(5), by centrifugal spraying method or hand spray mortar is equably sprayed to steel wire by step by design thickness requirement
Net and steel cylinder inner surface of pipeline, form the steel wire reinforced mortar layer of uniform ground；
(6), to completing steel wire reinforced mortar layer after spraying step carries out maintenance consolidation by related specifications, ultimately forms steel
The steel cylinder linked network spraying mortar compound lining that cylinder layer and steel wire reinforced mortar layer double-layer structure are consolidated, realizes force pipe
The reparation in road.
Heretofore described steel cylinder linked network spraying mortar compound lining be mainly used in cannot undertake set operating pressure,
The pressure pipeline of more than diameter 0.8m（Contain）Such as：Feed pipe, to have pressure water pipe, water conservancy culvert, thermal pipe, Gas Pipe etc. to carry out non-
Trenchless rehabilitation, the present invention is major diameter pressure pipeline（Contain）A kind of practicable non-excavation repairing technique is provided.Steel therein
Cylinder is to be processed into welding fabrication after pipe is strutted in old pipeline using the steel plate of thin-walled with steel wire reinforced mortar compound lining,
And steel wire is anchored in a welding manner steel cylinder inwall, then spray mortar and be completely covered steel cylinder, steel wire and be fixedly arranged at one
A kind of composite lining structure formed after rising.
When steel cylinder linked network spraying mortar composite lining structure in the present invention is designed, hydraulic pressure in all is undertaken by outer layer steel cylinder
Power, steel wire of internal layer net reinforced mortar layer undertakes vacuum pressure and pipe external pressure；Steel wire acts primarily as reinforced mortar and bonds with steel cylinder
Intensity, control mortar cracking, prevent broken grade of inner liner from acting on.
Heretofore described centrifugal spraying method is will at a distance to convey the mortar for coming by the sprayer of high speed rotation
The technology of inner-walls of duct is uniformly thrown under the influence of centrifugal force.
Heretofore described steel pipe base be using design specification, meet pumped (conveying) medium requirement steel plate curling form, steel
The length and width size that plate is intercepted should meet the requirement of line size.
The steel cylinder linked network spraying mortar compound lining and the method and prior art of pressure pipeline non-excavation rehabilitation of the present invention
Compare and have the advantages that：
1., steel cylinder linked network of the invention spraying mortar compound lining can be used for metal tube, pipe of concrete, fiberglass sand inclusion
All kinds of tubing such as pipe, the pressure pipeline of more than diameter 0.8m carry out structural non-excavation rehabilitation.
2., the method that the present invention sprays mortar compound lining pressure pipeline non-excavation rehabilitation using steel cylinder linked network, repairs pressure
Hydraulic piping it is easy to operate, can be changed according to conditions such as pipe diameter, pressure, buried depth environment, flexible design steel cylinder linked network spray
Buttering composite lining structure and size, it is possible to freely arrange to repair segment length；The steel cylinder linked network spraying mortar of the present invention is answered
The sealing for closing pipeline after liner may insure to repair is intact, can reliable and securely extend pipeline service life.
3., the present invention is a kind of practicable to can be used for the old pressure pipeline of non-excavation rehabilitation major diameter（Contain）Method.
Using the compound lining and pressure pipeline trenchless repairing method of the present invention, can be in the premise for not being reduced significantly pipeline flow section
Under, the anti-internal pressure capability of pipeline is improved, the effect that dilatation runs is realized by the raising of the operating pressure of pipeline, can make after reparation
Pipeline possesses the conveyance capacity more higher than old pipeline.
Description of the drawings
The steel cylinder linked network spraying mortar composite lining structure schematic diagram of Fig. 1 pressure pipeline non-excavation rehabilitations of the present invention.
The steel cylinder linked network spraying mortar compound lining pressure pipeline non-excavation rehabilitation schematic diagram of Fig. 2 present invention.
In above-mentioned figure：1- old pipelines；2- mortar prime coats；3- steel cylinder layers；4- steel wires；5- steel wire reinforced mortar layers；
6- centrifugal spraying devices；7- sprayer frames；8- conveying pipelines.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described with specific embodiment, but the enforcement not limited to this of the present invention.
Embodiment 1：The present invention provides a kind of steel cylinder linked network spraying mortar compound lining of pressure pipeline non-excavation rehabilitation,
Including steel cylinder layer 3 and steel wire reinforced mortar layer 5, its structure is as shown in Figure 1.Described compound lining is from outside to inside by steel cylinder layer
3rd, the double-layer structure of steel wire reinforced mortar layer 5 composition；Described steel cylinder layer 3 is arranged on the inner side of mortar prime coat 2, sand in old pipeline
Slurry prime coat is that the old pipeline inwall for cleaning is painted in repairing used pipeline；Described steel wire reinforced mortar layer 5
In be enclosed with steel wire 4, steel wire is the steel cylinder inner side that steel cylinder layer 3 is anchored at by welding, then on steel cylinder, the surface of steel wire 4
By the mortar of design spraying requirement thickness；Described steel cylinder layer 3 and the double-layer structure of steel wire reinforced mortar layer 5 is consolidated structure
Mortar compound lining is sprayed into steel cylinder linked network.
Described a diameter of more than the 0.8m for carrying out pressure pipeline non-excavation rehabilitation.
The steel wire 4 in the steel cylinder in steel cylinder layer 3 and steel wire reinforced mortar layer 5 described in the present embodiment adopts stainless steel
The steel of material.
Embodiment 2：The present invention provides a kind of steel cylinder linked network spraying mortar compound lining and pressure pipeline non-excavation rehabilitation
Method, first to carrying out thoroughly cleaning inside old pipeline 1 to be repaired, and removes the clast inside old pipeline 1, silt and convex
Play hard fulcrum；Implement as follows again：
Step makes old (1), using centrifugal spraying device 6 in the inner wall construction of old pipeline 1 for cleaning, spraying mortar prime coat 2
The inwall rounding of pipeline 1, without raised hard fulcrum.
The conditions such as step specification, embedded condition, design pressure (2), according to old pipeline 1, the steel cylinder that design undertakes internal pressure is thick
The thickness of the steel wire reinforced mortar layer 5 of external pressure and vacuum pressure is spent and undertaken, steel plate is selected with steel wire material and screed
Thickness；The internal diameter of the old pipeline that the steel plate for choosing is repaired on demand is pre-machined into a section section pipe.
Step (3), spraying mortar prime coat 2 be molded after, by pipe send into old pipeline predetermined interior position, strut, make
Outer surface of tube blank will form complete one together with being brought into close contact with spraying mortar prime coat 2 after the pipe welded closed for strutting
Section steel cylinder section；Again each section steel cylinder section is weldingly connected into into the continuous steel cylinder pipeline of a whole piece along pipe lengths, and is installed to
Position, forms steel cylinder layer 3.
Step (4), the steel wire 4 of selected specification welded on request anchor to whole piece steel cylinder inner-walls of duct.
(5), in pipeline step is erected at centrifugal spraying device 6 in sprayer frame 7, and the mortar of distant place passes through conveying pipeline 8
In being transported to centrifugal spraying device 6, open centrifugal spraying device 6 and switch, by the centrifugal spraying device of high speed rotation by mortar in centrifugation
Uniform spray in the presence of power is thrown to inner-walls of duct；As shown in Figure 2；Mortar is equably sprayed to steel by the thickness requirement of design
Silk screen and steel cylinder pipe surface, form the steel wire reinforced mortar layer 5 of uniform ground.
(6), to completing the steel wire reinforced mortar layer 5 after spraying step carries out maintenance consolidation by related specifications, ultimately forms
The steel cylinder linked network spraying mortar compound lining that steel cylinder layer 3 and the double-layer structure of steel wire reinforced mortar layer 5 are consolidated, completes pressure
The reparation of hydraulic piping.
The method of the steel cylinder linked network spraying mortar compound lining and pressure pipeline non-excavation rehabilitation of the present invention, repairs force pipe
Road it is easy to operate, sealing is intact after pipeline rehabilitation, can on the premise of pipeline flow section is not reduced significantly, improve pipeline
Anti- internal pressure capability, is allowed to, with higher conveyance capacity, reliably extend pipeline service life.
Claims (4)
1. a kind of steel cylinder linked network spraying mortar compound lining of pressure pipeline non-excavation rehabilitation, is provided with steel wire reinforced mortar
Layer, it is characterised in that：Steel cylinder layer is additionally provided with, described compound lining is from outside to inside by steel cylinder layer and steel wire reinforced mortar layer two
Rotating fields are constituted；The steel cylinder of described steel cylinder layer is arranged on mortar prime coat inner side, described steel wire in old pipeline to be repaired
Steel wire is enclosed with net reinforced mortar layer, steel wire is the steel cylinder inner side that steel cylinder layer is anchored at by welding, then in steel cylinder, steel
Silk screen surface is sprayed the mortar of requirement thickness by design；Described steel cylinder layer and steel wire reinforced mortar layer double-layer structure is fixedly arranged at
Together form steel cylinder linked network spraying mortar compound lining is used for pressure pipeline non-excavation rehabilitation.
2. the steel cylinder linked network of pressure pipeline non-excavation rehabilitation according to claim 1 sprays mortar compound lining, and it is special
Levy and be：A diameter of more than 0.8m of the pressure pipeline of described non-excavation rehabilitation.
3. the steel cylinder linked network of pressure pipeline non-excavation rehabilitation according to claim 1 sprays mortar compound lining, and it is special
Levy and be：The steel wire in steel cylinder and steel wire reinforced mortar layer in described steel cylinder layer should adopt the ordinary steel of phase same material
Material or stainless steel, using antirust treatment should be carried out during common iron.
4. the steel cylinder linked network described in a kind of employing claim 1 sprays the side of mortar compound lining pressure pipeline non-excavation rehabilitation
Method, carries out first thoroughly cleaning to old pipeline inside, and removes its internal clast and raised hard fulcrum；Characterized in that,
Implement as follows again：
Step sprays mortar bottoming (1), using centrifugal spraying device or hand spray mode in the old pipeline inner wall construction for cleaning
Layer, makes inner-walls of duct rounding, without raised hard fulcrum；
The internal diameter of the old pipeline that (2), by steel plate step repairs on demand is pre-machined into a section section pipe；
Step (3), after (1) step sprays mortar bottoming formable layer, by pipe send into old pipeline predetermined interior position, strut, make
Outer surface of tube blank will form a complete section together with being brought into close contact with spraying mortar prime coat after the pipe welded closed for strutting
Steel cylinder section；Again each section steel cylinder section is weldingly connected into into the continuous steel cylinder pipeline of a whole piece along pipe lengths, and is installed in place；
Step (4), the steel wire of selected specification welded on request anchor to whole piece steel cylinder inner-walls of duct；
Step (5), by centrifugal spraying method or hand spray by mortar by design thickness requirement equably spray to steel wire and
Steel cylinder inner surface of pipeline, forms the steel wire reinforced mortar layer of uniform ground；
(6), to completing steel wire reinforced mortar layer after spraying step carries out maintenance consolidation by related specifications, ultimately forms steel cylinder layer
Mortar compound lining is sprayed with the steel cylinder linked network that steel wire reinforced mortar layer double-layer structure is consolidated, pressure pipeline is realized
Repair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106906.6A CN104806843B (en) | 2015-03-12 | 2015-03-12 | Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106906.6A CN104806843B (en) | 2015-03-12 | 2015-03-12 | Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104806843A CN104806843A (en) | 2015-07-29 |
| CN104806843B true CN104806843B (en) | 2017-05-03 |
Family
ID=53691927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106906.6A Active CN104806843B (en) | 2015-03-12 | 2015-03-12 | Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104806843B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799691A (en) * | 2017-05-02 | 2018-11-13 | 湖南前鑫管业有限公司 | Pipeline maintenance device |
| CN109237198A (en) * | 2018-11-12 | 2019-01-18 | 上海辉拓市政工程有限公司 | A kind of urban underground water drainage pipe road profession restorative procedure |
| CN111804551A (en) * | 2020-06-29 | 2020-10-23 | 新兴铸管股份有限公司 | Method for processing cement lining of cast iron pipe |
| CN112895111A (en) * | 2021-01-14 | 2021-06-04 | 衡水瑟林科技有限公司 | Pipeline in-situ repairing method |
| CN112922384A (en) * | 2021-02-01 | 2021-06-08 | 上海予通管道工程技术有限公司 | Mortar spraying repair construction method |
| CN113074290A (en) * | 2021-03-18 | 2021-07-06 | 东莞市广渠建筑工程有限公司 | Non-excavation repairing system and repairing method for steel cylinder hanging net spraying mortar composite lining pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1288284A (en) * | 1969-11-27 | 1972-09-06 | ||
| CN1388335A (en) * | 2002-06-28 | 2003-01-01 | 侯贤忠 | Repairing method and repairing pipe structure for partially dug old pipeline with stainless lining |
| CN1563777A (en) * | 2004-04-15 | 2005-01-12 | 大庆油田建设集团 | Non-digging and integral repairing method for underground pipeline |
| CN1755184A (en) * | 2004-09-29 | 2006-04-05 | 孙跃平 | Excavation-free integral restoration method of underground conduit and inspection well |
| CN201242014Y (en) * | 2008-08-21 | 2009-05-20 | 濮阳市中拓管道清洗修复工程有限公司 | Large caliber inner lining restoring composite pipeline |
| CN101509589A (en) * | 2009-03-31 | 2009-08-19 | 崔同悦 | Non-digging pipe repairing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100525159B1 (en) * | 2002-09-06 | 2005-11-02 | 미나미건설 주식회사 | Method for repairing a non-excavation drainpipe capable being facilitate sewage stream |
-
2015
- 2015-03-12 CN CN201510106906.6A patent/CN104806843B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1288284A (en) * | 1969-11-27 | 1972-09-06 | ||
| CN1388335A (en) * | 2002-06-28 | 2003-01-01 | 侯贤忠 | Repairing method and repairing pipe structure for partially dug old pipeline with stainless lining |
| CN1563777A (en) * | 2004-04-15 | 2005-01-12 | 大庆油田建设集团 | Non-digging and integral repairing method for underground pipeline |
| CN1755184A (en) * | 2004-09-29 | 2006-04-05 | 孙跃平 | Excavation-free integral restoration method of underground conduit and inspection well |
| CN201242014Y (en) * | 2008-08-21 | 2009-05-20 | 濮阳市中拓管道清洗修复工程有限公司 | Large caliber inner lining restoring composite pipeline |
| CN101509589A (en) * | 2009-03-31 | 2009-08-19 | 崔同悦 | Non-digging pipe repairing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104806843A (en) | 2015-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104806843B (en) | Steel cylinder mesh suspended mortar spray compound lining and pressure pipe non-excavation repair method | |
| CN103542226B (en) | A kind of method of repairing large-diameter concrete water supply line | |
| CN101205999B (en) | Renovation reinforcement, reinforced and/or crack arrest technique for pipe | |
| CN104652415B (en) | High-polymer membrane bag grouting method is repaired in underground piping sedimentation | |
| CN106032867B (en) | The method and its pipeline of pipeline non-excavation rehabilitation reinforcement are carried out with light cured fiber enhancing composite material | |
| CN102691851A (en) | Method for reinforcing pipeline by adopting fibrous composite fabric | |
| CN105240644A (en) | Pipeline crack repairing device and method | |
| CN103437417B (en) | Part repair structure for steel lining of drainage pipeline | |
| CN201795223U (en) | Internal repair expansion device for pipeline cracking | |
| Tehrani et al. | Evaluation of filling the valleys of corrugated metal pipes by trenchless spray applied pipe linings | |
| US20190210063A1 (en) | Centrifugal Casting Concrete Pipe Method | |
| CN101619798B (en) | Direct-embedded heating pipeline insulating layer non-evacuation process, slurry matching and equipment thereof | |
| CN102252147B (en) | Method for repairing crack of pipeline | |
| CN206768829U (en) | A kind of outer grouting and reinforcing servicing unit of calvert below dam pipe | |
| CN108679359A (en) | A kind of restorative procedure of underground piping inner wall corrosion | |
| CN104421569A (en) | Pipeline overturn lining repair method | |
| CN114526398A (en) | Construction method for repairing drainage pipeline by newly added lining pipe | |
| Xin | Application of Trenchless Pipeline Rehabilitation Technology | |
| CN103195167B (en) | Method for lifting concrete in ultrahigh reducing steel pipe column | |
| CN206478322U (en) | Pipeline and its component | |
| CN201242014Y (en) | Large caliber inner lining restoring composite pipeline | |
| CN204343428U (en) | A kind of drainage inspection well sealing joint syndeton | |
| CN203498985U (en) | Local repair structure for steel lining of exhaust pipeline | |
| CN207454962U (en) | Pipeline and the conduit assembly with the pipeline | |
| CN211059522U (en) | Double-layer PE pipe for jacking pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 430079 Hubei Province, East Lake New Technology Development Zone, Optics Valley Venture Street, building 12, North building, room 901, room 4 Applicant after: Wuhan Zhong Da trenchless Research Institute Co., Ltd. Address before: 430079 Hubei Province, East Lake New Technology Development Zone, Optics Valley Venture Street, building 12, North building, room 901, room 4 Applicant before: Wuhan Zhongdi Guantong Trenchless Technology Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210204 Address after: 363600 Jinshan Industrial Zone, Magong village, Jinshan Town, Zhangzhou City, Fujian Province Patentee after: Zhangzhou Anyue New Material Technology Co.,Ltd. Address before: 430079 room 901, unit 4, north, building 12, Guanggu Chuangye street, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: Wuhan Zhongdi University Trenchless Research Institute Co.,Ltd. |
|
| TR01 | Transfer of patent right |