CN106150479B - Use method of convenient gravity type laser verticality and aperture detector - Google Patents
Use method of convenient gravity type laser verticality and aperture detector Download PDFInfo
- Publication number
- CN106150479B CN106150479B CN201510177878.7A CN201510177878A CN106150479B CN 106150479 B CN106150479 B CN 106150479B CN 201510177878 A CN201510177878 A CN 201510177878A CN 106150479 B CN106150479 B CN 106150479B
- Authority
- CN
- China
- Prior art keywords
- rotating arm
- retaining wall
- verticality
- laser
- frame
- 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
Abstract
The invention relates to the field of construction equipment, in particular to a gravity type laser verticality and aperture detector, which comprises: the top of the support rod can be flatly placed, and the leveling bubble is arranged at the top of the support rod; one end of the rotating arm is hinged to the middle of the supporting rod, when the supporting rod is placed horizontally, the moving plane of the rotation of the rotating arm is a horizontal plane, and an emitting head emitting light in the gravity direction is arranged on the rotating arm; the invention aims to provide a convenient gravity type laser verticality and aperture detector which can conveniently and efficiently detect the verticality and aperture in the pile body pore-forming process of a manual hole digging pile and reduce the operation hidden danger of personnel.
Description
Technical Field
The invention relates to the field of construction equipment, in particular to a gravity type laser verticality and aperture detector.
Background
At present, perpendicularity and aperture detection in the construction process of pile body hole forming of a manual hole digging pile in building engineering is usually carried out by adopting a method of adding a measuring scale by a plumb bob, although the method is simple and effective, due to the obstruction of various pipelines (such as an air compressor pipeline, a water pump hose, an air supply pipeline and the like) and supports (a wall protection concrete inner template and a support thereof) on a construction site, 2~3 people are required for detection each time and are matched with the circulating process of moving obstacles, paying off, plumbing, measuring scale and taking up at the same time, and the detection efficiency is very low; for the verticality detection of manual hole digging piles and the like with small diameters, constructors and quality supervision personnel can easily touch obstacles by the vertical moving hammer line in a mold (hole) in the detection process, and the detection difficulty and the potential safety hazard of personnel operation are increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the convenient gravity type laser verticality and aperture detector which can conveniently and efficiently detect the verticality and aperture in the pile body pore-forming process of the manual hole digging pile and reduce the potential safety hazard of personnel operation.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a convenient gravity type laser straightness, aperture detector that hangs down, it includes:
the top of the support rod can be flatly placed, and the leveling bubble is arranged at the top of the support rod;
and one end of the rotating arm is hinged to the middle part of the supporting rod, when the supporting rod is placed horizontally, the rotating motion plane of the rotating arm is a horizontal plane, and the rotating arm is provided with an emitting head for emitting light to the gravity direction (when the supporting rod is used, the horizontal position of the rotating arm cannot be ensured sometimes, and at the moment, the position of the rotating arm is automatically adjusted, and the emitting head for emitting light to the gravity direction can still avoid the inaccuracy of measurement).
Positioning a cross mark above a hole opening of the manual hole digging pile according to positioning and setting-out of a total station, wherein a supporting rod is flatly placed at the top of the manual hole digging pile, the supporting rod is adjusted to be horizontal through a level bubble, a rotating arm can horizontally rotate after the supporting rod is horizontal, the transmitting head transmits a laser light source to the gravity direction, namely, the laser light source downwards transmits the laser light source, a light mark is projected at the bottom of the manual hole digging pile, the position of the light mark is adjusted to be tightly attached to the edge of the inner wall of the manual hole digging pile, the rotating arm is rotated for 360 degrees to detect, the distance from the center of the manual hole digging pile to the transmitting head is measured, the hole diameter of the manual hole digging pile can be measured, meanwhile, the positions of a cursor and the transmitting head are on the same axis of the gravity direction, the verticality of the side wall and the protecting wall in the hole forming process of the manual hole digging pile can be measured according to the characteristics, and the supervision of the construction process is convenient;
the method does not need to measure the pile in the manual hole digging pile like the excavation of each section of the manual hole digging pile and the construction of the protecting wall in the prior art, can improve the efficiency and reduce the potential safety hazard.
As the preferable scheme of the invention, the supporting rod is formed by hinging two sections of rods with equal length, can be opened and closed around a hinging shaft in the middle, can be folded, and is convenient to transport/store.
As the preferred scheme of the invention, the shaft at the hinged position of the rotating arm and the supporting rod is coaxial with the hinged shaft at the middle part of the supporting rod, and the rotating arm can rotate horizontally when the supporting rod level bubble is in the horizontal position through a simple coaxial structure.
As the preferable scheme of the invention, the emitting head is capable of emitting laser, so that the identification degree is stronger and the observation is convenient.
As a preferable aspect of the present invention, the emitter head includes:
a frame;
one end of the laser emitter is hinged to the frame, a universal head weight is arranged on the laser emitter, the laser emitter is enabled to face downwards all the time, and a laser path emitted by the laser emitter is enabled to be in the gravity direction by utilizing the law of universal gravitation;
and the power supply is arranged on the frame, is connected with the laser emitter and supplies power to the laser emitter.
In a preferred embodiment of the present invention, the frame is slidably mounted on the rotary arm, and can lock the relative position between the frame and the rotary arm, so that the detector is suitable for manual dug piles of different sizes.
As the preferable scheme of the invention, the rotating arm is provided with the ruler matched with the transmitting head, the ruler is provided with scales, and the center of the ruler is the zero return position of the transmitting head on the rotating arm, so that the reading is convenient, the structure is simple, and the manufacturing cost is reduced.
In a preferred embodiment of the present invention, the rotating arm is a rectangular tube with a hollow lower opening, the emitting head is installed inside the rectangular tube, the laser can be emitted from the lower opening of the rectangular tube, the material is easily available, elaborate processing is not required, and the manufacturing cost is reduced.
As a preferred scheme of the invention, a locking device is arranged between the transmitting head and the rotating arm, the locking device can be screwed and fix the frame on the rotating arm in a threaded connection mode, the material is easy to obtain, over elaborate processing is not needed, the manufacturing cost is reduced, and the replacement and maintenance are easy.
As a preferred embodiment of the present invention, when the laser emitter rotates around the hinge shaft connected to the frame, the movement plane is parallel to the axial direction of the length direction of the rotating arm (when the support rod is used, the support rod sometimes cannot be kept horizontal, the rotating arm forms an included angle with the horizontal plane, the rotation plane is not horizontal, and then the emitter head which automatically adjusts the position and still emits light in the gravity direction can avoid the inaccuracy of measurement within a certain range).
Compared with the prior art, the invention has the beneficial effects that:
the perpendicularity and the aperture in the pile body pore-forming process of the manual hole digging pile are conveniently and efficiently detected, and the potential safety operation hazards of personnel are reduced.
Drawings
FIG. 1 is a side view of the meter of the present invention.
FIG. 2 is a schematic structural diagram of an emitter head according to the present invention.
The labels in the figure are: the method comprises the following steps of 1-supporting rod, 2-rotating arm, 3-emitting head, 4-power supply, 5-frame, 6-laser emitter, 7-nut, 8-stop block and 9-bolt.
Detailed Description
The present invention will be described in further detail with reference to examples and embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, a portable gravity type laser verticality and aperture detector comprises:
the top of the support rod 1 which can be flatly placed is provided with a level bubble, so that the level of the support rod can be conveniently adjusted;
and one end of the rotating arm 2 is hinged to the middle part of the supporting rod 1, when the supporting rod 1 is horizontally placed, the rotating plane of the rotating arm 2 is a horizontal plane, and the rotating arm 2 is provided with an emitting head 3 emitting light to the gravity direction.
In this embodiment, the support rod 1 is formed by two sections of rods with equal length, and can be opened and closed around a hinge shaft in the middle.
In this embodiment, the axis of the hinged position of the rotating arm 2 and the supporting rod 1 is coaxial with the hinged axis in the middle of the supporting rod 1.
In this embodiment, the emitting head 3 is an emitting head 3 capable of emitting laser.
As shown in fig. 2, in the present embodiment, the emitter 3 includes:
a frame 5 (a transparent acrylic plate, which is convenient for observing the internal structure of the frame 5 and is convenient for installation and maintenance);
one end of the laser emitter 6 is hinged on the frame 5, and a heavy object is arranged on the laser emitter 6 to ensure that the laser emitter 6 is always downward;
and a power supply 4 (a 3.7v 950mAh lithium ion battery) attached to the frame 5 and connected to the laser emitter 6.
In this embodiment, the frame 5 is slidably mounted on the rotating arm 2, and can lock the relative position with the rotating arm 2.
In this embodiment, a ruler (stainless steel long ruler) matched with the transmitting head 3 is arranged on the rotating arm 2, the ruler is provided with scales, and the center of the ruler is the zero return position of the transmitting head 3 on the rotating arm 2.
In this embodiment, the rotating arm 2 is a hollow rectangular aluminum alloy tube (1300 × 46 × 25 × 1mm, with a 15mm slot in the middle of the width of 25mm along the rectangular tube), the emitting head 3 is installed inside the rectangular tube, and the laser can be emitted from the opening below the rectangular tube.
In this embodiment, be provided with the locking device between emission head 3 and the swinging boom 2, through threaded connection's mode, can screw and handle frame 5 is fixed in on the swinging boom 2, frame 5 inside is fixed with nut 7, and the bolt 9 supporting with it is provided with dog 8 from the outside screw in nut 7 of swinging boom 2 between bolt 9 cap and the swinging boom 2, and the bolt 9 of screwing can compress tightly dog 8, fixes the relative position of frame 5 and swinging boom 2 through its and the frictional force between the swinging boom 2, fixes emission head 3 promptly.
In this embodiment, when the laser transmitter 6 rotates around the hinge shaft connected to the frame 5, the movement plane is parallel to the longitudinal axial direction of the rotating arm 2.
The use process comprises the following steps:
A. firstly, after the construction of a first section of retaining wall of a manual hole digging pile is completed, positioning and paying off by using a total station, and making a central positioning cross line paint mark of the hole pile on the top above a hole opening of the retaining wall;
B. unfolding the support rod 1 into a straight shape, aligning two ends of the support rod with the paint marks at the centers of the hole piles at the upper parts of the pre-made first-section retaining wall hole openings, and leveling and centering the leveling bubble;
C. turning on a power supply of the transmitting head 3, accurately corresponding the measured aperture to the position of the scale shown by the rotating arm 2, and performing 360-degree rotation detection;
D. keeping the detector horizontal and vertical, rotating the rotating arm 2 for 360 degrees before excavating the second section of retaining wall earthwork, and indicating the marked line of the inner diameter to be excavated by a laser light source at the bottom of the hole;
E. after the earthwork excavation of the second section of the retaining wall is finished, binding retaining wall reinforcing steel bars and beginning to erect a retaining wall template, similarly erecting a detector checking retaining wall template on the upper part of the first section of the retaining wall, and performing the concrete pouring of the retaining wall in the next procedure after reinforcing the inner and outer apertures and the verticality of the formed template;
F. after the second section of retaining wall concrete is poured and the retaining wall template is removed, a detector is erected on the upper portion of the first section of retaining wall to check the clearance and the verticality of the inner diameter of the formed retaining wall concrete, and the early concrete with local deformation is subjected to timely chiseling treatment.
G. And the subsequent dado construction sequentially adopts the procedures to check the verticality and the radius.
Through detecting 1568 manual hole digging piles with the pile diameters of 900mm, 1000mm, 1100mm and 1200mm and the pile length of 3-31 meters, the detector disclosed by the invention can improve the detection efficiency by 80% and can reach a standard allowable value for the verticality accuracy.
Claims (5)
1. The use method of the convenient gravity type laser verticality and aperture detector is characterized in that the convenient gravity type laser verticality and aperture detector comprises the following steps: the top of the support rod can be flatly placed, and the leveling bubble is arranged at the top of the support rod; one end of the rotating arm is hinged to the middle of the supporting rod, when the supporting rod is horizontally placed, the rotating plane of the rotating arm is a horizontal plane, and an emitting head for emitting laser towards the gravity direction is arranged on the rotating arm; the transmitting head comprises a frame, a laser transmitter and a power supply, one end of the laser transmitter is hinged to the frame, a universal head weight is arranged on the laser transmitter to enable the laser transmitter to face downwards all the time, and the power supply is arranged on the frame and connected with the laser transmitter; the supporting rod is formed by hinging two sections of rods with equal length and can be opened and closed around a hinging shaft in the middle, and the shaft at the hinging position of the rotating arm and the supporting rod is coaxial with the hinging shaft in the middle of the supporting rod; a ruler matched with the emission head is arranged on the rotating arm, scales are arranged on the ruler, and the center of the ruler is the return-to-zero position of the emission head on the rotating arm;
the using method comprises the following steps:
A. firstly, after the construction of a first section of retaining wall of a manual hole digging pile is completed, positioning and paying off by using a total station, and making a central positioning cross line paint mark of the hole pile on the top above a hole opening of the retaining wall;
B. unfolding the support rod into a straight shape, aligning two ends of the support rod with a pre-made hole pile center paint mark at the upper part of the hole of the first section of the retaining wall, and leveling and centering the leveling bubble;
C. turning on a power supply of the transmitting head, accurately corresponding the measured aperture to the position of the scale shown by the rotating arm, and performing 360-degree rotation detection;
D. keeping the detector horizontal and vertical, rotating the detector for 360 degrees by using a rotating arm before excavating the earthwork of the second protective wall, and indicating the marked line of the inner diameter to be excavated by using a laser light source at the bottom of the hole;
E. after the earthwork excavation of the second section of the retaining wall is finished, binding retaining wall reinforcing steel bars and beginning to erect a retaining wall template, similarly erecting a detector checking retaining wall template on the upper part of the first section of the retaining wall, and performing the concrete pouring of the retaining wall in the next procedure after reinforcing the inner and outer apertures and the verticality of the formed template;
F. after the second section of retaining wall concrete is poured and the retaining wall template is removed, erecting a detector on the upper part of the first section of retaining wall to check the clearance and the verticality of the inner diameter of the formed retaining wall concrete, and performing timely chiseling treatment on the early concrete with local deformation;
G. and the subsequent dado construction sequentially adopts the procedures to check the verticality and the radius.
2. The method of using a portable gravity laser verticality and aperture detector according to claim 1, wherein the frame is slidably mounted on the rotating arm and is capable of locking the relative position of the frame to the rotating arm.
3. The use method of the portable gravity type laser verticality and aperture detector according to claim 2 is characterized in that the rotating arm is a hollow rectangular tube with a lower opening, the transmitting head is installed inside the rectangular tube, and the laser can be emitted from the lower opening of the rectangular tube.
4. The use method of the portable gravity type laser verticality and aperture detector as claimed in claim 2, wherein a locking device is arranged between the transmitting head and the rotating arm, and the frame can be screwed and fixed on the rotating arm in a threaded connection manner.
5. The method for using the portable gravity laser verticality and aperture detector according to claim 1, wherein the movement plane of the laser transmitter is parallel to the axial direction of the length direction of the rotating arm when the laser transmitter rotates around the hinge shaft connected with the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177878.7A CN106150479B (en) | 2015-04-15 | 2015-04-15 | Use method of convenient gravity type laser verticality and aperture detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177878.7A CN106150479B (en) | 2015-04-15 | 2015-04-15 | Use method of convenient gravity type laser verticality and aperture detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150479A CN106150479A (en) | 2016-11-23 |
| CN106150479B true CN106150479B (en) | 2023-01-31 |
Family
ID=58057710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510177878.7A Active CN106150479B (en) | 2015-04-15 | 2015-04-15 | Use method of convenient gravity type laser verticality and aperture detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106150479B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871882B (en) * | 2017-04-07 | 2023-07-25 | 中国建筑土木建设有限公司 | Hole digging pile verticality and flatness laser guiding device and construction method thereof |
| CN110424951A (en) * | 2019-07-04 | 2019-11-08 | 中国建筑第八工程局有限公司 | The measuring tool and its application method of pile foundation hole perpendicularity |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB193126A (en) * | 1921-11-15 | 1923-02-15 | Ramon Gonzales | Improvements in and relating to apparatus for ascertaining the contour of the inner surface of boilers or the like |
| CN201007651Y (en) * | 2006-09-22 | 2008-01-16 | 上海光中测绘仪器有限公司 | Vertical axis device for bidirectional laser vertical collimator |
| CN201666778U (en) * | 2010-03-26 | 2010-12-08 | 中国第一冶金建设有限责任公司 | Diameter and verticality detecting device of pile foundation hole |
| US7921573B1 (en) * | 2009-03-23 | 2011-04-12 | Ric-Man Construction, Inc. | Monitoring verticality of a sinking caisson |
| CN202622054U (en) * | 2011-12-19 | 2012-12-26 | 中国一冶集团有限公司 | Vertically upward type positioning drilling device for laser positioning of drill hole with controllable depth |
| CN103603653A (en) * | 2013-11-25 | 2014-02-26 | 国家电网公司 | Method and device for measuring inclination of drilled hole |
| CN103775064A (en) * | 2014-01-10 | 2014-05-07 | 国家电网公司 | Device for detecting quality of hole formed in hole-digging cast-in-place pile |
| CN203685167U (en) * | 2013-11-25 | 2014-07-02 | 国家电网公司 | Device for measuring drilling hole inclination degree |
| CN203702139U (en) * | 2014-01-10 | 2014-07-09 | 国家电网公司 | Hole digging cast-in-place pile pore-forming quality detection device |
| CN204571971U (en) * | 2015-04-15 | 2015-08-19 | 中铁二局股份有限公司 | A kind of convenient gravity laser vertical degree, diameter detecting instrument |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4429917A1 (en) * | 1994-08-23 | 1996-02-29 | Keller Grundbau Gmbh | Determination of the diameter or wall thickness of support or wall elements |
| US6412235B1 (en) * | 2000-09-08 | 2002-07-02 | Joseph T. Pylant | Removable screw-type, in-ground anchor device |
| JP3883119B2 (en) * | 2002-11-22 | 2007-02-21 | 積水ハウス株式会社 | Vertical check device for steel pipe piles |
| CN2773623Y (en) * | 2005-01-31 | 2006-04-19 | 罗建辉 | Instrument for inspecting column template verticality |
| CN201254738Y (en) * | 2008-07-18 | 2009-06-10 | 蒋成峰 | Drilling filling pile squareness detecting instrument |
| CN103015431B (en) * | 2012-12-04 | 2014-09-10 | 北京建材地质工程公司 | Foundation pit supporting method for manual dig-hole cement-soil steel pile |
-
2015
- 2015-04-15 CN CN201510177878.7A patent/CN106150479B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB193126A (en) * | 1921-11-15 | 1923-02-15 | Ramon Gonzales | Improvements in and relating to apparatus for ascertaining the contour of the inner surface of boilers or the like |
| CN201007651Y (en) * | 2006-09-22 | 2008-01-16 | 上海光中测绘仪器有限公司 | Vertical axis device for bidirectional laser vertical collimator |
| US7921573B1 (en) * | 2009-03-23 | 2011-04-12 | Ric-Man Construction, Inc. | Monitoring verticality of a sinking caisson |
| CN201666778U (en) * | 2010-03-26 | 2010-12-08 | 中国第一冶金建设有限责任公司 | Diameter and verticality detecting device of pile foundation hole |
| CN202622054U (en) * | 2011-12-19 | 2012-12-26 | 中国一冶集团有限公司 | Vertically upward type positioning drilling device for laser positioning of drill hole with controllable depth |
| CN103603653A (en) * | 2013-11-25 | 2014-02-26 | 国家电网公司 | Method and device for measuring inclination of drilled hole |
| CN203685167U (en) * | 2013-11-25 | 2014-07-02 | 国家电网公司 | Device for measuring drilling hole inclination degree |
| CN103775064A (en) * | 2014-01-10 | 2014-05-07 | 国家电网公司 | Device for detecting quality of hole formed in hole-digging cast-in-place pile |
| CN203702139U (en) * | 2014-01-10 | 2014-07-09 | 国家电网公司 | Hole digging cast-in-place pile pore-forming quality detection device |
| CN204571971U (en) * | 2015-04-15 | 2015-08-19 | 中铁二局股份有限公司 | A kind of convenient gravity laser vertical degree, diameter detecting instrument |
Non-Patent Citations (3)
| Title |
|---|
| 大直径钻孔灌注桩检测综述;吴成元等;《工程勘察》;20061231(第7期);第65-71页 * |
| 竖井施工垂直度标高激光测控仪的研制;姜晨光等;《仪器仪表学报》;20060630;第27卷(第6期);第1442-1443页 * |
| 超高层住宅群塔选型布置设计与安拆运维管理综合技术;彭志强等;《施工技术》;20141231;第43卷(第21期);第105-109页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150479A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105783759B (en) | A kind of roadway surrounding rock overall deformation monitoring device and method | |
| CN212747771U (en) | Underground drainage pipeline inner bottom elevation measuring device | |
| CN203464889U (en) | Special-purpose building template verticality detection ruler | |
| CN105547089A (en) | Underground pipeline detection system | |
| CN106150479B (en) | Use method of convenient gravity type laser verticality and aperture detector | |
| CN207636084U (en) | High-rise verticality adjusts detection device | |
| CN204571971U (en) | A kind of convenient gravity laser vertical degree, diameter detecting instrument | |
| CN207335629U (en) | Ground displacement monitoring device | |
| CN215524629U (en) | Measuring device for building engineering management | |
| CN216448887U (en) | Simple remote plumb bob device for perpendicularity test | |
| CN207335640U (en) | It is a kind of to exempt from the device measured to well room space of going into the well | |
| CN202372171U (en) | Portable straightness gauge | |
| CN205422692U (en) | Portable drilling angular instrument | |
| CN106052507B (en) | Pipe gallery gut line generally investigates survey tool and method | |
| CN210741472U (en) | Multifunctional level detector | |
| CN211651588U (en) | Automatic rotating device for high formwork settlement monitoring laser point cloud based on unmanned aerial vehicle | |
| CN212320586U (en) | Equipment for measuring vertical degree of upright post | |
| CN107860317B (en) | Method for detecting displacement or vibration amplitude of structure based on displacement of laser spot | |
| CN210460637U (en) | A but, rotation of shaft orientation is accurate appearance support that hangs down | |
| CN204963746U (en) | Scaffold detection ruler | |
| CN101762719B (en) | Portable laser indicator used in galleries | |
| CN205691768U (en) | A kind of laser range finder adaptive box | |
| CN205537646U (en) | Measuring prism device that can transversely use | |
| CN210768731U (en) | High-precision measuring device for mine underground shaft and roadway | |
| CN211373593U (en) | Measure hang down straightness's instrument of wall post template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Applicant after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Applicant before: CHINA RAILWAY NO.2 BUREAU ENGINEERING Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190125 Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Applicant after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Applicant after: CHINA RAILWAY ERJU CONSTRUCTION CO.,LTD. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Applicant before: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |