CN107143752A - A kind of prestress pipe deformation and spillage detector and its application method - Google Patents
A kind of prestress pipe deformation and spillage detector and its application method Download PDFInfo
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- CN107143752A CN107143752A CN201710562074.8A CN201710562074A CN107143752A CN 107143752 A CN107143752 A CN 107143752A CN 201710562074 A CN201710562074 A CN 201710562074A CN 107143752 A CN107143752 A CN 107143752A
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- Prior art keywords
- spillage
- detector
- cylinder
- prestress pipe
- pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
Abstract
The present invention relates to a kind of deformation of prestress pipe and spillage detector, including the cylinder for inserting prestress pipe, the two ends of the cylinder are provided with the pull element for being used for axially pulling cylinder, and the peripheral part of the cylinder is fixed with sponge of the external diameter more than the internal diameter of prestress pipe.The prestress pipe deforms simple in construction with spillage detector, it is easy to implement, low cost, it can detect that prestress pipe is deformed and whether is spillage, the cleaning of Deformation Repair and pipeline spillage can also be carried out, ensure that prestress pipe is indeformable, clean no-sundries in pipeline, it is ensured that the normal of steel strand wires is penetrated.
Description
Technical field
The present invention relates to a kind of deformation of prestress pipe and spillage detector and its application method, belong to building structure construction
Field.
Background technology
Building post tensioning structure construction needs the pre-buried prestress pipe in concrete structure construction, pre- for wearing
Prestress steel strand, conventional construction method has two kinds, and its concrete construction method and defect are as follows：
1st, steel strand after first pre-buried pipeline.Construction method is：When structure reinforcing bars are installed, by prestress pipe installation simultaneously
After fixation, casting concrete, when concrete strength reaches design requirement, then prestress wire progress prestressing force is worn
Draw construction.Its defect is：Some fine defects of pipeline itself, joint not enough tight, reinforcement installation, electric welding construction, template peace
The processes such as dress easily cause pipe crack, breakage etc., and the trickle crack in part, breakage are difficult to be found, in concreting
Easily occur spillage phenomenon, also, pipe deforming phenomenon also easily occur in concreting, cause from now on that steel strand wires can not
Penetrate pipeline.There is scholar to propose wireless camera being arranged on dolly at present, observation tube chanting of folk tales to the accompaniment of simple percussion instruments is carried out into prestress pipe
Condition, this way is also defective：Prestress pipe inner wall smooth, most of pipelines are forniciform, and dolly is " upper and lower in pipeline
Slope " is extremely difficult, also, at pipe bending, vision blind angle easily occurs, and inner-walls of duct is also also easy to produce reflective phenomenon and influenceed
Monitoring imaging, therefore, it is difficult to accomplish situation in comprehensive monitoring pipeline, even if monitoring pipe deforming and spillage, can not also be managed
Recover and clear up in road.
2nd, steel strand wires are put on before concreting.Construction method is：While prestress pipe is installed, by prestress steel
Twisted wire penetrates pipeline, then casting concrete again, in casting concrete and after the completion of, be often extracted into steel strand wires, examine steel to twist
Can line normally twitch.Its defect is：Some fine defects of pipeline itself, joint not enough tight, reinforcement installation, electric welding are applied
The processes such as work, model sheetinstallat easily cause pipe crack, breakage etc., and the trickle crack in part, breakage are difficult to be found, in coagulation
In pouring spillage phenomenon easily occurs for soil, before cement mortar hardening, spillage phenomenon can not be found by twitching steel strand wires, in cement
After starch, steel strand wires have been difficult to twitch and can not change steel strand wires.Also, pipeline change is also easily caused in concreting
Shape phenomenon, causes steel strand wires not twitch, or causes the defects such as loss of prestress increase.
The content of the invention
In view of the deficiencies in the prior art, the technical problems to be solved by the invention be to provide a kind of prestress pipe deformation with
Spillage detector and its application method, are not only simple in structure, and convenient and efficient.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of prestress pipe deformation is detected with spillage
Device, including for inserting the cylinder of prestress pipe, the two ends of the cylinder are provided with the pull element for being used for axially pulling cylinder,
The peripheral part of the cylinder is fixed with sponge of the external diameter more than the internal diameter of prestress pipe.
It is preferred that, the cylinder includes the cylinder that is mutually spirally connected and round platform cylinder, the sponge be clamped in cylinder with
The linking of round platform cylinder is sewed on, and the taper end of the round platform cylinder is facing forward.
It is preferred that, the front end of the cylinder is coaxially provided with external screw thread, and the rear end of the round platform cylinder is coaxially provided with interior spiral shell
Line.
It is preferred that, the front end of the round platform cylinder is provided with wireless camera and illuminating lamp.
It is preferred that, the pull element includes being connected to the rear-pulling rope of cylinder rear end and is connected to round platform barrel front end
Threading apparatus.
It is preferred that, the threading apparatus includes hard oval head, is connected between the round platform barrel front end and hard oval head
There is poling draught line.
It is preferred that, the sponge is shaped as annular, and the thickness of the sponge is 10mm, external diameter is than prestressing force to be detected
The big 60mm of internal diameter of pipeline, internal diameter is identical with externally threaded diameter.
It is preferred that, the length of the rear-pulling rope and threading apparatus is all higher than prestress pipe length 1m to be detected, the cylinder
The diameter of body is identical with the diameter of round platform cylinder back-end, and than the small 5mm of internal diameter of prestress pipe to be detected, the cylinder
It is equal to the internal diameter of prestress pipe with the overall length L of round platform cylinder.
It is preferred that, prestress pipe deformation, which also includes several with spillage detector, is used for cotton of the colligation on threading apparatus
Cloth.
A kind of prestress pipe deformation and the application method of spillage detector, are carried out according to the following steps：
（1）Sponge is inserted in the external screw thread of cylinder, the internal thread of round platform cylinder is directed at external screw thread, screws and clamps sponge；
（2）In prestressed structure concrete pouring construction, the hard oval head of threading apparatus is inserted from prestress pipe left end,
Through prestress pipe, stretched out from prestress pipe right-hand member, in right-hand member by artificial slow at the uniform velocity pull threading apparatus, in left end by people
Work is by sponge bending and is adjacent to cylinder, is then fed into prestress pipe；
（3）If draw process smoothly, by wireless camera observes pipeline inside no abnormality seen and detector is passed from right-hand member
Afterwards, do not find that sponge surface has cement mortar, then prove prestress pipe it is intact without deformation without spillage；
（4）If draw process has local phenomenon of being obstructed, but detector can still pass through, then the position prestress pipe that proves to be obstructed has gently
Light deformation phenomenon, should adjust construction method, prevent deformation from expanding, and should repeat detection；
（5）If detector, which occurs, in draw process can not twitch phenomenon, illustrate that the prestress pipe deformation of relevant position is serious, utilize
Wireless camera observes pipeline inside information condition, confirms after pipe deforming situation, drawing threading apparatus of putting forth one's strength, will using the head of round platform cylinder
Recover circular in pipe deforming position；If deformation can not recover, after the particular location that deformation should be determined according to the stroke of detector,
The concrete of removal relevant position, is reduced after external pressure, then draws threading apparatus, pipeline is recovered circular；Pass through wireless camera
The recovery situation of pipeline is observed, confirms after normal recover, proceeds subsequent detection, if but finding that pipe deforming is increased in observation
Or fracture etc. abnormal conditions when, pull threading apparatus, and pull rear-pulling rope should be stopped immediately, detector is reversely extracted out pipeline, unload
Except the pipeline that deformation is changed after local concrete；
（6）In draw process, find that pipeline has spillage phenomenon by wireless camera, pull should be suspended, wireless camera is utilized
Head examines the seriousness of spillage, or detector is passed after pipeline, it is found that sponge surface speckles with cement mortar, according to cement mortar
Amount can determine whether the size of spillage amount；If belonging to slight spillage, reciprocally pull threading apparatus, cement in pipeline is wiped using sponge
Slurry, and cement mortar is taken out of outside pipeline, after sponge cleaning is wrung out, repeat to enter prestress pipe pull, utilize the suction of sponge
Cement mortar in aqueous progressively cleaning pipeline；
（7）If belonging to serious spillage, after detector is extracted out, cotton, cotton are fixed in colligation on the anterior threading apparatus of round platform cylinder
Diameter after cloth compresses through appropriate dynamics should be identical with prestress pipe internal diameter, and cotton and detector are penetrated into pipe with threading apparatus
Road, is found accurately behind spillage position using wireless camera, and cotton is moved to spillage position by pull rear-pulling rope, to block spillage mouthful,
When concrete initial set, cotton and detector are extracted out pipeline, after the cement mortar of cleaning sponge and cotton contamination, then by detector
Pipeline is reciprocated into and out, the cement mortar of residual is progressively wiped using sponge and cotton；If finding the serious spillage phenomenon of multiple spot in detection,
The detail location for utilizing wireless camera to judge spillage point one by one is then needed, and colligation fixes many on the relevant position of threading apparatus
Individual cotton, then threading apparatus is penetrated into pipeline, pull detector to appropriate position, it is ensured that each cotton can cover each spillage
Point, equally when concrete initial set, then extracts out after detector, cleaning sponge and each cotton cement mortar, reciprocates into and out pipeline, progressively
Wipe the cement mortar of residual；
（8）After prestressed structure concreting through detect pipeline without deformation without spillage, or after spillage cleaning or Deformation Repair
Afterwards, before concrete initial set, detection should be repeated, verify again pipeline without deformation without spillage, or find new spillage or
Deformation should continue to clear up or repair.
Compared with prior art, the invention has the advantages that：The prestress pipe is deformed and spillage detector
Simple in construction, it is easy to implement, low cost can detect that prestress pipe is deformed and whether is spillage, can also carry out Deformation Repair
With the cleaning of pipeline spillage, it is ensured that prestress pipe is indeformable, clean no-sundries in pipeline, it is ensured that the normal of steel strand wires is penetrated.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the exploded perspective view of the embodiment of the present invention.
Fig. 2 is the structural representation of sponge in the embodiment of the present invention.
Fig. 3 is the use state schematic diagram one of the embodiment of the present invention.
Fig. 4 is the use state schematic diagram two of the embodiment of the present invention.
Embodiment
For the features described above and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed
Carefully it is described as follows.
As shown in Fig. 1 ~ 4, a kind of prestress pipe deformation and spillage detector, including for inserting prestress pipe 1
Cylinder, the two ends of the cylinder are provided with the pull element for being used for axially pulling cylinder, and the peripheral part of the cylinder is fixed with external diameter
More than the sponge 2 of the internal diameter of prestress pipe, sponge should be from deflection is big, resilience is good, friction resistant performance high, be difficult to rub
Product that is broken, being not likely to produce sponge bits.
In embodiments of the present invention, the cylinder includes the cylinder 3 being mutually spirally connected and round platform cylinder 4, the sponge holder
Tightly sewed in cylinder with being connected for round platform cylinder, forward, cylinder and round platform cylinder are hollow to the taper end of the round platform cylinder
Construction, can make of metal materials such as aluminium alloys.
In embodiments of the present invention, the front end of the cylinder is coaxially provided with external screw thread 5, and the rear end of the round platform cylinder is same
Axle is provided with internal thread 6.
In embodiments of the present invention, the front end of the round platform cylinder is provided with wireless camera 7 and illuminating lamp 8, and illuminating lamp should
From charged pool, with brightness is high, small volume the characteristics of, illuminating lamp and wireless camera should be fixedly secured in round platform cylinder head position
Put.
In embodiments of the present invention, the pull element includes being connected to the rear-pulling rope 9 of cylinder rear end and is connected to circle
The threading apparatus 10 of platform barrel front end, rear-pulling rope can use good bending property and the high materials of tensile strength such as nylon rope, seizing wire
Make, threading apparatus can select the poling draught line used during electrician's threading in pipe, and termination is hard oval head, can fast be passed through
Various pipes.
In embodiments of the present invention, the threading apparatus includes hard oval head 11, and the round platform barrel front end and hard are ellipse
Poling draught line 12 is connected between round end.
In embodiments of the present invention, the sponge is shaped as annular, and the thickness of the sponge is 10mm, external diameter ratio is treated
The big 60mm of internal diameter of prestress pipe is detected, internal diameter is identical with externally threaded diameter.
In embodiments of the present invention, the rear-pulling rope and the length of threading apparatus are all higher than prestress pipe length to be detected
1m, the diameter of the cylinder is identical with the diameter of round platform cylinder back-end, and the internal diameter than prestress pipe to be detected is small
The overall length L of 5mm, the cylinder and round platform cylinder is equal to the internal diameter of prestress pipe, and rear-pulling rope and threading apparatus length all should be big
In prestress pipe length to be detected, the rope that can increase of rear-pulling rope curtailment connects spreading, threading apparatus curtailment
A threading apparatus can be connect again and connects spreading.
In embodiments of the present invention, prestress pipe deformation is also being worn with spillage detector including several for colligation
Cotton 13 on line device.
A kind of prestress pipe deformation and the application method of spillage detector, are carried out according to the following steps：
（1）Sponge is inserted in the external screw thread of cylinder, the internal thread of round platform cylinder is directed at external screw thread, screws and clamps sponge；
（2）In prestressed structure concrete pouring construction, the hard oval head of threading apparatus is inserted from prestress pipe left end,
Through prestress pipe, stretched out from prestress pipe right-hand member, in right-hand member by artificial slow at the uniform velocity pull threading apparatus, in left end by people
Work is by sponge bending and is adjacent to cylinder, is then fed into prestress pipe；
（3）If draw process smoothly, by wireless camera observes pipeline inside no abnormality seen and detector is passed from right-hand member
Afterwards, do not find that sponge surface has cement mortar, then prove prestress pipe it is intact without deformation without spillage；
（4）If draw process has local phenomenon of being obstructed, but detector can still pass through, then the position prestress pipe that proves to be obstructed has gently
Light deformation phenomenon, should adjust construction method, prevent deformation from expanding, and should repeat detection；
（5）If detector, which occurs, in draw process can not twitch phenomenon, illustrate that the prestress pipe deformation of relevant position is serious, utilize
Wireless camera observes pipeline inside information condition, confirms after pipe deforming situation, drawing threading apparatus of putting forth one's strength, will using the head of round platform cylinder
Recover circular in pipe deforming position；If deformation can not recover, after the particular location that deformation should be determined according to the stroke of detector,
The concrete of removal relevant position, is reduced after external pressure, then draws threading apparatus, pipeline is recovered circular；Pass through wireless camera
The recovery situation of pipeline is observed, confirms after normal recover, proceeds subsequent detection, if but finding that pipe deforming is increased in observation
Or fracture etc. abnormal conditions when, pull threading apparatus, and pull rear-pulling rope should be stopped immediately, detector is reversely extracted out pipeline, unload
Except the pipeline that deformation is changed after local concrete；
（6）In draw process, find that pipeline has spillage phenomenon by wireless camera, pull should be suspended, wireless camera is utilized
Head examines the seriousness of spillage, or detector is passed after pipeline, it is found that sponge surface speckles with cement mortar, according to cement mortar
Amount can determine whether the size of spillage amount；If belonging to slight spillage, reciprocally pull threading apparatus, cement in pipeline is wiped using sponge
Slurry, and cement mortar is taken out of outside pipeline, after sponge cleaning is wrung out, repeat to enter prestress pipe pull, utilize the suction of sponge
Cement mortar in aqueous progressively cleaning pipeline；
（7）If belonging to serious spillage, after detector is extracted out, colligation is fixed on round platform cylinder front portion 200mm threading apparatus
The long cottons of 200mm, the diameter after cotton compresses through appropriate dynamics should be identical with prestress pipe internal diameter, with threading apparatus by cotton and
Detector penetrates pipeline, is found accurately using wireless camera behind spillage position, and cotton is moved to spillage position by pull rear-pulling rope,
To block spillage mouthful, when concrete initial set out, cotton and detector are extracted to the cement mortar of pipeline, cleaning sponge and cotton contamination
Afterwards, then by detector pipeline is reciprocated into and out, the cement mortar of residual is progressively wiped using sponge and cotton；If finding multiple spot in detection
Serious spillage phenomenon, then need to judge the detail location of spillage point one by one using wireless camera, and in the corresponding positions of threading apparatus
Put colligation and fix multiple cottons, then threading apparatus is penetrated into pipeline, pull detector to appropriate position, it is ensured that each equal energy of cotton
Each spillage point is covered, equally when concrete initial set, then is extracted out after detector, cleaning sponge and each cotton cement mortar, back and forth
Inlet and outlet piping, progressively wipes the cement mortar of residual；
（8）After prestressed structure concreting through detect pipeline without deformation without spillage, or after spillage cleaning or Deformation Repair
Afterwards, before concrete initial set, detection should be repeated, verify again pipeline without deformation without spillage, or find new spillage or
Deformation should continue to clear up or repair.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that other are each under the enlightenment of the present invention
Prestress pipe deformation and spillage detector and its application method of the form of kind.It is all according to scope of the present invention patent done it is equal
Deng change and modification, it should all belong to the covering scope of the present invention.
Claims (10)
1. a kind of prestress pipe deformation and spillage detector, it is characterised in that：Including the cylinder for inserting prestress pipe,
The two ends of the cylinder are provided with the pull element for being used for axially pulling cylinder, and the peripheral part of the cylinder is fixed with external diameter more than pre-
The sponge of the internal diameter of stress pipeline.
2. prestress pipe deformation according to claim 1 and spillage detector, it is characterised in that：The cylinder includes phase
The cylinder being mutually spirally connected and round platform cylinder, the sponge are clamped in cylinder and sewed on being connected for round platform cylinder, the frustum cone cylinder
The taper end of body is facing forward.
3. prestress pipe deformation according to claim 2 and spillage detector, it is characterised in that：Before the cylinder
End is coaxially provided with external screw thread, and the rear end of the round platform cylinder is coaxially provided with internal thread.
4. prestress pipe deformation according to claim 2 and spillage detector, it is characterised in that：The round platform cylinder
Front end is provided with wireless camera and illuminating lamp.
5. prestress pipe deformation according to claim 2 and spillage detector, it is characterised in that：The pull element bag
Include the threading apparatus for being connected to the rear-pulling rope of cylinder rear end Yu being connected to round platform barrel front end.
6. prestress pipe deformation according to claim 5 and spillage detector, it is characterised in that：The threading apparatus includes
Hard oval head, poling draught line is connected between the round platform barrel front end and hard oval head.
7. prestress pipe deformation according to claim 3 and spillage detector, it is characterised in that：The shape of the sponge
For annular, the thickness of the sponge is 10mm, and external diameter is than the big 60mm of internal diameter of prestress pipe to be detected, internal diameter and external screw thread
Diameter it is identical.
8. prestress pipe deformation according to claim 5 and spillage detector, it is characterised in that：The rear-pulling rope is with wearing
The length of line device is all higher than prestress pipe length 1m to be detected, the diameter of the cylinder and the diameter phase of round platform cylinder back-end
Together, and it is equal to prestressed pipe than the small 5mm of internal diameter of prestress pipe to be detected, the overall length L of the cylinder and round platform cylinder
The internal diameter in road.
9. prestress pipe deformation according to claim 1 and spillage detector, it is characterised in that：The prestress pipe becomes
Shape, which also includes several with spillage detector, is used for cotton of the colligation on threading apparatus.
10. a kind of prestress pipe deformation and the application method of spillage detector, it is characterised in that using such as claim 1-9
Described any prestress pipe deformation and spillage detector, and carry out according to the following steps：
（1）Sponge is inserted in the external screw thread of cylinder, the internal thread of round platform cylinder is directed at external screw thread, screws and clamps sponge；
（2）In prestressed structure concrete pouring construction, the hard oval head of threading apparatus is inserted from prestress pipe left end,
Through prestress pipe, stretched out from prestress pipe right-hand member, in right-hand member by artificial slow at the uniform velocity pull threading apparatus, in left end by people
Work is by sponge bending and is adjacent to cylinder, is then fed into prestress pipe；
（3）If draw process smoothly, by wireless camera observes pipeline inside no abnormality seen and detector is passed from right-hand member
Afterwards, do not find that sponge surface has cement mortar, then prove prestress pipe it is intact without deformation without spillage；
（4）If draw process has local phenomenon of being obstructed, but detector can still pass through, then the position prestress pipe that proves to be obstructed has gently
Light deformation phenomenon, should adjust construction method, prevent deformation from expanding, and should repeat detection；
（5）If detector, which occurs, in draw process can not twitch phenomenon, illustrate that the prestress pipe deformation of relevant position is serious, utilize
Wireless camera observes pipeline inside information condition, confirms after pipe deforming situation, drawing threading apparatus of putting forth one's strength, will using the head of round platform cylinder
Recover circular in pipe deforming position；If deformation can not recover, after the particular location that deformation should be determined according to the stroke of detector,
The concrete of removal relevant position, is reduced after external pressure, then draws threading apparatus, pipeline is recovered circular；Pass through wireless camera
The recovery situation of pipeline is observed, confirms after normal recover, proceeds subsequent detection, if but finding that pipe deforming is increased in observation
Or fracture etc. abnormal conditions when, pull threading apparatus, and pull rear-pulling rope should be stopped immediately, detector is reversely extracted out pipeline, unload
Except the pipeline that deformation is changed after local concrete；
（6）In draw process, find that pipeline has spillage phenomenon by wireless camera, pull should be suspended, wireless camera is utilized
Head examines the seriousness of spillage, or detector is passed after pipeline, it is found that sponge surface speckles with cement mortar, according to cement mortar
Amount can determine whether the size of spillage amount；If belonging to slight spillage, reciprocally pull threading apparatus, cement in pipeline is wiped using sponge
Slurry, and cement mortar is taken out of outside pipeline, after sponge cleaning is wrung out, repeat to enter prestress pipe pull, utilize the suction of sponge
Cement mortar in aqueous progressively cleaning pipeline；
（7）If belonging to serious spillage, after detector is extracted out, cotton, cotton are fixed in colligation on the anterior threading apparatus of round platform cylinder
Diameter after cloth compresses through appropriate dynamics should be identical with prestress pipe internal diameter, and cotton and detector are penetrated into pipe with threading apparatus
Road, is found accurately behind spillage position using wireless camera, and cotton is moved to spillage position by pull rear-pulling rope, to block spillage mouthful,
When concrete initial set, cotton and detector are extracted out pipeline, after the cement mortar of cleaning sponge and cotton contamination, then by detector
Pipeline is reciprocated into and out, the cement mortar of residual is progressively wiped using sponge and cotton；If finding the serious spillage phenomenon of multiple spot in detection,
The detail location for utilizing wireless camera to judge spillage point one by one is then needed, and colligation fixes many on the relevant position of threading apparatus
Individual cotton, then threading apparatus is penetrated into pipeline, pull detector to appropriate position, it is ensured that each cotton can cover each spillage
Point, equally when concrete initial set, then extracts out after detector, cleaning sponge and each cotton cement mortar, reciprocates into and out pipeline, progressively
Wipe the cement mortar of residual；
（8）After prestressed structure concreting through detect pipeline without deformation without spillage, or after spillage cleaning or Deformation Repair
Afterwards, before concrete initial set, detection should be repeated, verify again pipeline without deformation without spillage, or find new spillage or
Deformation should continue to clear up or repair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710562074.8A CN107143752B (en) | 2017-07-11 | 2017-07-11 | A kind of deformation of prestress pipe and spillage detector and its application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710562074.8A CN107143752B (en) | 2017-07-11 | 2017-07-11 | A kind of deformation of prestress pipe and spillage detector and its application method |
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| Publication Number | Publication Date |
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| CN107143752A true CN107143752A (en) | 2017-09-08 |
| CN107143752B CN107143752B (en) | 2019-06-21 |
Family
ID=59776547
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108049573A (en) * | 2017-12-11 | 2018-05-18 | 中交公局海威工程建设有限公司 | Prestress pipe deforms prospecting apparatus and its application method |
| CN113669638A (en) * | 2021-08-06 | 2021-11-19 | 西安石油大学 | Petroleum pipeline leakage monitoring device |
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| KR20040082709A (en) * | 2003-03-20 | 2004-09-30 | 심석래 | Rock Anchor |
| CN101435269B (en) * | 2008-12-22 | 2010-09-01 | 中铁二局股份有限公司 | Prestress pipe anti-blocking method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107143752B (en) | 2019-06-21 |
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