CN102749661B - The installation method of electronic mark in non-excavation type afterloading tube - Google Patents
The installation method of electronic mark in non-excavation type afterloading tube Download PDFInfo
- Publication number
- CN102749661B CN102749661B CN201110101828.2A CN201110101828A CN102749661B CN 102749661 B CN102749661 B CN 102749661B CN 201110101828 A CN201110101828 A CN 201110101828A CN 102749661 B CN102749661 B CN 102749661B
- Authority
- CN
- China
- Prior art keywords
- electronic mark
- pipeline
- mark
- installation
- type
- 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.)
- Expired - Fee Related
Links
Landscapes
- Manipulator (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses the installation method of electronic mark in a kind of non-excavation type afterloading tube, it is characterised in that including: described electronic mark sends into the inside of described pipeline via pipe end, and is installed in the preset place of described inner-walls of duct.The mode installed in the pipe that the application uses has the most a little: first is that horizontal accuracy is high；Because usual external mark is placed in the excavation region at pipeline place in work progress, it is likely that arbitrarily put and not in the vertical direction of pipeline, thus reduce horizontal accuracy；Second is that vertical precision is high, and reason is similar to first, and external mark is likely to be placed the position higher than the many distances of pipeline thus reduces precision.
Description
Technical field
The invention belongs to civilian underground pipe network field, particularly relate to electronics mark in non-excavation type afterloading tube
The installation method known.
Background technology
It is embedded in underground piping for providing various public utilities purposes, including for coal gas, tap water
With the pipeline of sewage, and for phone, electric power and the cable of TV.In order to keep in repair or replace damage
Cable, pipeline etc., the detection to them usually becomes the most necessary.On the contrary, in order to avoid because of
They are damaged it is known that the Position Approximate of these pipelines is the heaviest when excavating or dig by other purpose
Want.Mark in current civilian underground piping is pasted and is the most substantially placed on above pipeline.
There are two kinds for the prior art detecting these shielded pipelines.The first technology requires that this manages
Road have along its length (or) continuous conductor, the most not only have for carrying signal or electric power
Copper conductor, general also have earth-shielded phone, electric power and the camera cable etc. surrounding cable.Available
The second technology in the pipeline (such as coal gas, water main) not having this continuous conductor requires burying
First electron marker is being placed close to the local of pipeline when entering pipeline.
In the first technology, conductor directly or is inductively added test signal (alternating current),
Then conductor play antenna effect and along pipeline length radiation test signal.Then detection device is used
In the existence of detection test signal, this detector also can process signal with determine the lateral of conductor and it
The degree of depth.Cable fault locator the earliest employs single sensor, and it detects near cable time
Single paddy or peak (according to the orientation of sensor).Many devices later employ two or more sensing
Device, thus signal syntheses to indicate with providing conductor distance.Modal sensor is ferrite magnetic
Heart antenna, i.e. inducer.Following special in the second technology, electron marker can be active
(such as, there is battery to provide signal), but the LC resonant circuit made by capacitor and coil
Passive Tag more conventional.One given hard wired marker only has single-frequency (band alleviating distention in middle-JIAO
Heart line), its value determines according to electric capacity and the inductance of circuit.There is the nothing of active antenna and pick-up antenna
Line electricity transceiver is used for detecting Passive Tag.Active antenna exports off and on and is tuned to excite marker
Frequency.If having the marker of applicable frequency near wireless set, then this marker is inhaled
Receive a part of signal and again radiated it.During wireless set output signal, pick-up antenna
Monitor any signal again radiated, if it find that one notes that user, and the commonly provided signal
The instruction of intensity.
In general, the method that detector circuit uses be conductor or marker with detection target and
Different.While it is true, also have a kind of hybrid system, wherein signal is added to be embedded in the conductor of underground, and
The one or more markers being embedded near this conductor it are coupled to by this conductor.Such as, the patent No. is seen
It it is the United States Patent (USP) of 4,119,908,4,767,237 and 4,862,088.In Patent No. 4,866,388
United States Patent (USP) in, also one conductor is coupled with other conductor with marker, thus tests signal
Second conductor can be passed to without being directly connected to.
And at present for the electronic mark installation of existing pipeline, still lack the rear dress side of a kind of non-excavation type
Method and technique.The electronic marking system that Minnesota Mining and Manufacturing Company is researched and developed, uses spherical (or dish) electromagnetism
Marker, is placed on above new pipeline when laying new pipeline, uses positioner to detect this marker
To obtain the position of this pipeline.This marker can only be embedded in outside pipeline, and can not be placed in pipeline
Portion, therefore cannot realize no-dig technique and install.
Under the informationalized trend of current pipeline, we are a kind of efficiently easily to both in the urgent need to finding
There is the method that duct size informationization is transformed.
Summary of the invention
For the problem of existing duct size informationization transformation, the present invention provides dress electricity after a kind of non-excavation type
The method of son mark, under the conditions of underground piping position is not clear, it is achieved the electronics mark under the conditions of no-dig technique
Know and install.
The present invention discloses the installation method of electronic mark in a kind of non-excavation type afterloading tube, and its feature exists
In, including:
Described electronic mark sends into the inside of described pipeline via pipe end, and is installed in institute
State the preset place of inner-walls of duct.
Reasonable, described method farther includes:
Step one, pipe robot is entered by described pipe end, and electronic mark to be installed is deposited
Inside described pipe robot；
Step 2, described pipe robot is advanced in described pipeline and positions, when described pipeline
Robot arrives installed position, transferring arm described electronic mark is sent to its described installation arm,
After this electronic mark is positioned at described inner-walls of duct by described installation arm, real by snap ring-type or adhesive type
Fixing of existing electronic mark；
Step 3, it may be judged whether complete to install, if it is not complete, return step 2；
Step 4, once installation, described pipe robot is by backtracking or via another port
Take out.
Reasonable, for the pipeline that bore is less, use snap ring-type electronic mark.
Reasonable it is, it is characterised in that in described step 2, farther include: when described pipeline
When robot arrives installation site, transferring arm electronic mark is sent to it and arm is installed, arm is installed and makes
Electronic mark realizes positioned parallel in inner-walls of duct, discharges snap ring subsequently, is allowed to utilize natural resiliency to open
Power realization fits tightly with inner-walls of duct.
Reasonable, for the pipeline that bore is bigger, use adhesive type electronic mark.
Reasonable, in described step 2, farther include: when described pipe robot is advanced
During to installation site, start brush, clean, the stickup position of described electronic mark of polishing；Then,
Start its electronic mark clamping device, detacher realize stripping and the recovery of Packaging Paper, use pellet type machine
Mechanical arm and rolling device realize the installation of described electronic mark.
The present invention uses pipe robot or alternate manner, via pipe end, is sent by electronic mark
Enter pipe interior, and be installed in pre-position, detectivity on the ground can be realized, can
Differentiate for pipeline location and character thereof.Use electronic mark and the mounting process thereof of present invention proposition,
Only need to provide pipe end, it is not necessary to excavation, without finding out pipeline location in advance, can realize existing
The information reform of pipeline.
Accompanying drawing illustrates:
Below, referring to the drawings, for those skilled in the art, to side of the present invention
In the detailed description of method, the above and other objects, features and advantages of the present invention will be apparent to.
Fig. 1 is the electronic mark scheme of installation of the present invention；
Fig. 2 is the flow chart that existing pipe interior electronic mark is installed；
Fig. 3 is snap ring-type electronic mark sectional view；
Fig. 4 is snap ring-type electronic mark installation robot system schematic diagram；
Fig. 5 is the sectional view that snap ring-type electronic mark installs effect in pipeline；
Fig. 6 is adhesive type pipe robot structural representation；
Fig. 7 (a)～the Packaging Paper stripping process schematic diagram that 7 (d) is adhesive type electronic mark；
Fig. 8 is adhesive type electronic mark Packaging Paper recovery schematic diagram in pipeline.
Detailed description of the invention
See Fig. 1, show in pipeline the schematic diagram of electronic mark after installing.Electronic mark 2 warp
By pipe end 3, pipe robot 5 carry feeding pipeline 1 internal, when pipe robot 5 row
When entering pre-position A or B, carry out the installation of electronic mark 2.Electronic mark 2 installation
After, pipe robot 5 can be taken out by pipe end 3 or another pipe end 4 by backtracking.Figure
The installation procedure figure of electronic mark in the 2 non-excavation type afterloading tubes providing the present invention.Its corresponding step is detailed
Carefully it is described as follows:
S21, pipe robot is entered by pipe end, and electronic mark to be installed leaves pipe machine in
Inside device people；
S22, under operator instruct, pipe robot is advanced in pipeline and positions.This
Time, between pipe robot and operator, realize communication by the most general wired or wireless mode.
Current technology level can be by pipe robot to emission radio wave signal, it is achieved pipeline machine
The location of people, until it reaches electronic mark design and installation position.
For the pipeline that bore is less, can be with the use of snap ring-type electronic mark.When described pipe machine
When device people arrives installation site, transferring arm electronic mark is sent to it and arm is installed, arm is installed and makes electricity
Son is identified in inner-walls of duct and realizes positioned parallel, discharges snap ring subsequently, is allowed to utilize natural resiliency tension force
Realization fits tightly with inner-walls of duct.
For the pipeline that bore is bigger, can be with the use of adhesive type electronic mark.Now, at pipeline
Robot front end sets brush, arranges thereafter rolling device.When pipe robot advances to design attitude,
Start brush, clean, the stickup position of electronic mark of polishing；Meanwhile, start electronic mark clamping device,
Realized stripping and the recovery of Packaging Paper by detacher, realize electronics mark with pellet type mechanical arm and rolling device
The installation known.
S23, the installation of electronic mark, in electronic mark design and installation position, pipe robot is in operation
Under personnel control, electronic mark is taken out, positions and fixes.The installation of snap ring-type electronic mark, main
To be completed by transferring arm and installation arm；The installation of adhesive type electronic mark, then need after cleaning, polishing,
Completed by clamping device, pallet and Packaging Paper detacher.Above-mentioned instruction by operator in pipeline outgoing
Going out, after pipe robot receives instruction by wired or wireless mode, action is filled by the system that is controlled by
Put and send action command, related device specifically complete a series of electronic mark installation action.Pipeline
Robot can by cable or from charged pool by the way of provide electric energy, to support its work in pipeline
Make.
S24, it may be judged whether complete to install, if it is not complete, return step s22, proceeds row
Enter and position, then installing, until completing.
S25, once installation, pipe robot takes out by backtracking or via another port.
The pipe robot used in above process includes: movement device, control system and the mould that communicates
Block.Wherein, the movement device of snap ring-type electronic mark installation pipe robot, including transferring arm and
Installing arm, transferring arm is for realizing electronic mark in the transmission within pipe robot；Installation arm is used for
The location of electronic mark, open snap ring and fix；The action of adhesive type electronic mark installation robot
Device, mainly brush, clamping device, pallet and detacher.Above-mentioned movement device, by controlling system
System sends instruction, it is achieved corresponding actions.Communication module is mainly used in the information between people and pipe robot
Transmission, it is achieved robot localization, the function of action control, can use the side wirelessly or non-wirelessly communicated
Formula is carried out.
The electronic mark used in the application, including snap ring-type and adhesive type, but is not limited to above two
Form.Snap ring-type electronic mark, uses non-metallic elastic material, can control it by band or draw-in groove
Folding, once disengages at band or draw-in groove, then its diameter significantly increases, and relies on the elasticity tension of snap ring
Realize fixing in pipeline.Adhesive type electronic mark, can make card form, pass through pipe machine
Repeatedly rolling of device people's rolling device realizes and the fitting tightly of inner-walls of duct.Inside underground utilities
Bad environments, fluid velocity is big, and corrosivity is strong, and electronic mark itself and installation thereof all should meet durable
Property material enters requirement, as carried out macromolecular material encapsulation.Additionally, the thickness of electronic mark in pipe, it is
Not affect premised on pipeline normally uses.
Fig. 3-Fig. 5 is snap ring-type electronic mark and installation diagram thereof.Fig. 3 is snap ring-type electronic mark 2
Sectional view.The main body of this snap ring-type electronic mark 2 is resilient nonmetallic material, its physical characteristic and pipe
Road material behavior is similar, and the induction installation of snap ring-type electronic mark 2 is inside elastomeric material.Installing
Before, snap ring-type electronic mark 2 is in impaction state, by being fixed on snap ring termination 5, the bundle of 6
Band is connected at 7,8, and now, the external diameter of snap ring-type electronic mark 2 is slightly less than internal diameter of the pipeline,
Leaving space is operated, it is simple to realize the location of electronic installation for pipe robot；Once band is from 7,8
Place disconnects, then snap ring opens, and utilizes its outside elasticity tension to realize and the fitting tightly of inner-walls of duct.
Fig. 4 is snap ring-type electronic mark installation robot system schematic diagram.Control unit 9 is by operating
Personnel remotely control, and after arriving design attitude, i.e. mechanical arm 10 are sent action command, machinery
Arm 10 (right side in figure) motion forward, releases pipe robot warehouse by snap ring-type electronic mark 11；
Subsequently, arm 12 is installed and regulates the position of snap ring-type electronic mark, be allowed to parallel with inner-walls of duct；
The connection between band 7,8 is cut off on electronic mark subsequently by the mechanical hand installed on arm 12, will card
Ring type electronic mark 11 is released in pipe interior.
Fig. 5 is the sectional view of effect after snap ring-type electronic mark is installed in pipeline, relies on snap ring electronics
Identify 2 outside elasticity tensions to realize and the fitting tightly of pipeline 1 inwall.
Fig. 6-Fig. 8 gives the schematic diagram that adhesive type electronic mark realizes process in more detail.Fig. 6 is viscous
Mounted pipe robot structural representation (can see internal each several part when cutting open at numbering 24 from figure
Situation), its work process is as follows:
1. after pipe robot arrives at design attitude, start brush 14, during advancing, do left and right
Motion, to clean veneer.
2., during Overlaying process, pipe robot travels forward, after cleanup action completes, and electricity
Son mark storehouse 15 i.e. runs to clean post-facing position.
3. mechanical arm 16 moves upward, and is pushed to by electronic mark above electronic mark storehouse 15, release
Going out one piece of electronic mark, electronic mark corner clamped by mark holder action folder 17.
4. detacher 18 travels forward, to electronic mark front position after under press, with its underpart glue
Property face bonds with electronic mark upper surface Packaging Paper 28；Detacher 18 is carried so that it is at the beginning of returning on subsequently
Beginning position, Packaging Paper gradually disengages with electronic mark in the process.
5., below detacher 18 initial position, it is provided with Packaging Paper recovery bin 19.Detacher 18
After reset, mechanical arm is pressed for 20 times, promotes Packaging Paper to move downward, and it is clamping at mechanical arm 20
And between fixing post 21, detacher rearward movement subsequently, make the viscous of Packaging Paper 28 and detacher 18
Property emaciated face from；Packaging Paper 28 falls into recovery bin 19；Subsequently, detacher 18, mechanical arm 20 reset,
Wait next step action.
6., after Packaging Paper 28 is peeled off, mark pallet 22 is inserted the lower section of electronic mark to be pasted, holds up
Electronic mark moves upward, until it reaches pipeline top.
7. rolling device 23 makees front-rear reciprocation movement, repeatedly rolls electronic mark lower surface, is allowed to and manages
Road inwall fits tightly.Subsequently, mark pallet 22 and rolling device 23 reset.
8. pipe robot continues on, and to next electronic mark installation site, completes electronic mark
After installment work, take out through backtracking or by another port.
Fig. 7 (a)～the Packaging Paper stripping process that 7 (d) is adhesive type electronic mark.Fig. 7 (a)
For the original state of adhesive type electronic mark, it is coated with one layer at electronic mark 26 and Packaging Paper 28 and glues
Mixture 27；Fig. 7 (b) is the state after detacher 18 runs to electronic mark edge, in-position
After, detacher is pressed for 18 times, bonds with Packaging Paper upper surface；Fig. 7 (c) is that detacher 18 is to far-end
After, Packaging Paper 28 and electronic mark 26 close on the state of disengaging；Fig. 7 (d) is after Packaging Paper is peeled off,
The state of electronic mark.
Fig. 8 is the recovery schematic diagram of electronic mark Packaging Paper.After detacher 18 resets, mechanical arm 20
Under press, promote Packaging Paper to move downward, and it is clamping between mechanical arm 20 and fixing post 21,
Detacher rearward movement subsequently, makes Packaging Paper 28 depart from the adhesive faces of detacher 18；Packaging Paper 28
Fall into recovery bin 19, it is achieved the recovery of Packaging Paper；Detacher 18 and mechanical arm 20 reset, under wait
One step action.
Pipe robot of the present invention, it is possible to achieve snap ring-type and the pipe of adhesive type electronic mark
Install in road.Electronic mark in the pipe used, its appearance forrns can be annular or card-type but not
Be limited to this type of form, it by pasting, the mode such as squeezed be fixed on existing pipe interior.The present invention carries
The employing pipe robot gone out carries out existing pipeline electronic mark and installs, it is not necessary to excavation and ground location,
Difficult survey, being accurately positioned of indeterminacy pipeline can be realized.
Just with current pipeline external application/put mark in terms of location, the side installed in the pipe that the application uses
Formula has the most a little: first is that horizontal accuracy is high；Because usual external mark is put in work progress
In the excavation region at pipeline place, it is likely that arbitrarily put and not in the vertical direction of pipeline, thus
Reduce horizontal accuracy；Second is that vertical precision is high, and reason is similar to first, and external mark very may be used
Can be placed higher than the many squares of pipeline from position thus reduce precision.
The description to preferred embodiment provided above, so that any technical staff in this area can
Use or utilize the present invention.It is aobvious to the various amendments of these embodiments to those skilled in the art
And be clear to, total principle described here can be applied to other embodiments and do not use creativeness.
Thus, the present invention is not limited to embodiment depicted herein, and should be disclosed herein former according to meeting
Reason and the widest range of new feature.
Claims (5)
1. the installation method of electronic mark in a non-excavation type afterloading tube, it is characterised in that including:
Step one, pipe robot is entered by the port of a pipeline, and electronic mark to be installed leaves in
Inside described pipe robot；
Step 2, described pipe robot is advanced in described pipeline and positions, when described pipeline
Robot arrives installed position, transferring arm described electronic mark is sent to it and installs arm, described
After this electronic mark is positioned at described inner-walls of duct by installation arm, realize electricity by snap ring-type or adhesive type
Fixing of son mark；
Step 3, it may be judged whether complete to install, if it is not complete, return step 2；
Step 4, once installation, described pipe robot is by backtracking or via described pipeline
Another port take out.
The installation method of electronic mark in non-excavation type afterloading tube the most according to claim 1,
It is characterized in that, for the pipeline that bore is less, use snap ring-type electronic mark.
The installation method of electronic mark in non-excavation type afterloading tube the most according to claim 2,
It is characterized in that, in described step 2, farther including:
When described pipe robot arrives installation site, transferring arm electronic mark is sent to it and pacifies
Dress arm, installs arm and makes electronic mark realize positioned parallel in inner-walls of duct, discharge snap ring subsequently, be allowed to
Natural resiliency tension force is utilized to realize and the fitting tightly of inner-walls of duct.
The installation method of electronic mark in non-excavation type afterloading tube the most according to claim 1,
It is characterized in that, for the pipeline that bore is bigger, use adhesive type electronic mark.
The installation method of electronic mark in non-excavation type afterloading tube the most according to claim 3,
It is characterized in that, in described step 2, farther include:
When described pipe robot advances to installation site, start brush, clean, polish described
The stickup position of electronic mark；Then, start its electronic mark clamping device, detacher realize encapsulation
The stripping of paper and recovery, realize the installation of described electronic mark with pellet type mechanical arm and rolling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110101828.2A CN102749661B (en) | 2011-04-22 | 2011-04-22 | The installation method of electronic mark in non-excavation type afterloading tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110101828.2A CN102749661B (en) | 2011-04-22 | 2011-04-22 | The installation method of electronic mark in non-excavation type afterloading tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102749661A CN102749661A (en) | 2012-10-24 |
| CN102749661B true CN102749661B (en) | 2016-11-09 |
Family
ID=47030002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110101828.2A Expired - Fee Related CN102749661B (en) | 2011-04-22 | 2011-04-22 | The installation method of electronic mark in non-excavation type afterloading tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102749661B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119908A (en) * | 1975-11-28 | 1978-10-10 | A. P. C. Industries, Inc. | Method for locating buried markers which are disposed along the path of an underground conductor |
| US4860088A (en) * | 1986-10-11 | 1989-08-22 | Microelectronics And Computer Technology Corporation | Electrical interconnect tape |
| US4866388A (en) * | 1988-05-11 | 1989-09-12 | Minnesota Mining And Manufacturing Company | System and method with passive resonant circuit markers for locating buried electrical conductors |
| CN2570597Y (en) * | 2002-09-10 | 2003-09-03 | 章以露 | Combustion gas storage cylinder automatic monitoring aerating apparatus |
| CN200990169Y (en) * | 2006-12-22 | 2007-12-12 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Electronic mark warning belt for buried pipeline |
-
2011
- 2011-04-22 CN CN201110101828.2A patent/CN102749661B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119908A (en) * | 1975-11-28 | 1978-10-10 | A. P. C. Industries, Inc. | Method for locating buried markers which are disposed along the path of an underground conductor |
| US4860088A (en) * | 1986-10-11 | 1989-08-22 | Microelectronics And Computer Technology Corporation | Electrical interconnect tape |
| US4866388A (en) * | 1988-05-11 | 1989-09-12 | Minnesota Mining And Manufacturing Company | System and method with passive resonant circuit markers for locating buried electrical conductors |
| CN2570597Y (en) * | 2002-09-10 | 2003-09-03 | 章以露 | Combustion gas storage cylinder automatic monitoring aerating apparatus |
| CN200990169Y (en) * | 2006-12-22 | 2007-12-12 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Electronic mark warning belt for buried pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102749661A (en) | 2012-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207799086U (en) | Base station based on differential position and automatic working system | |
| US9809125B2 (en) | Apparatus for transmitting wireless power for electric car | |
| US7969295B2 (en) | Device, system and method for the location and identification of as-built plants of pipes, conduits, cables or hidden objects | |
| EP3058393B1 (en) | Electronic marker devices and systems | |
| EP2831640B1 (en) | Buried service detection | |
| CN107508390A (en) | A kind of crusing robot wireless charging system and method | |
| JP2001099946A (en) | Buried position detecting method of object and its device | |
| CN208158162U (en) | A kind of mobile wireless charging equipment | |
| CN102749661B (en) | The installation method of electronic mark in non-excavation type afterloading tube | |
| CN104242384A (en) | Long-distance wireless charging system and method based on solar energy | |
| CN104218636A (en) | Positioning method and positioning system for wireless charging | |
| CN208695797U (en) | A kind of ultrasonic dredger of pipeline fixed point | |
| CN104914857A (en) | Intelligent boundary column | |
| CN105785474A (en) | Underground mineral detector | |
| KR101689735B1 (en) | Collective System of Integrated Information for Underground Distributed Line with Pad Transformer and Pad Switch | |
| CN211905724U (en) | Based on thing networking pipeline detection monitoring device | |
| JPH0743459A (en) | Apparatus for detecting underground embedded material | |
| CN201259524Y (en) | High voltage open circuit positioning device | |
| GB2449650A (en) | RFID marker | |
| CN206258134U (en) | A kind of buried cable panoramic view data collecting device | |
| CN105807337A (en) | Underground mineral detector with information capable of being stored | |
| EP1758221B1 (en) | Flush junction box including antenna | |
| CN212364609U (en) | Underground metal pipeline positioning device | |
| CN206710535U (en) | A kind of cable detection system | |
| CN103672417B (en) | A kind of bushing type underground installation wireless transmission automatic early-warning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20200422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |