CN204925045U - Flexible array detection probe unit of vertical guided wave of pipeline supersound - Google Patents
Flexible array detection probe unit of vertical guided wave of pipeline supersound Download PDFInfo
- Publication number
- CN204925045U CN204925045U CN201520536248.XU CN201520536248U CN204925045U CN 204925045 U CN204925045 U CN 204925045U CN 201520536248 U CN201520536248 U CN 201520536248U CN 204925045 U CN204925045 U CN 204925045U
- Authority
- CN
- China
- Prior art keywords
- probe
- plate
- main body
- screw
- detection probe
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model relates to a nondestructive testing technique field, concretely relates to flexible array detection probe unit of vertical guided wave of pipeline supersound. Include a plurality of probe unit, be used for to fix into the probe unit ring array's chain unit and be used for the fastener of probe end laminating on the pipeline that awaits measuring with the probe unit. The utility model discloses a probe unit compact structure, mechanical coupling are effectual, the utility model discloses a device has the characteristics of fast loading and unloading, modularization and flexibility, can realize the regulation of anchor clamps length, probe array element specification, the multinomial parameter of the array element quantity and the probe angle of incidence.
Description
Technical field
The utility model relates to technical field of nondestructive testing, is specifically related to a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device.
Background technology
Pipeline, as a kind of fluid working substance transfer unit of high efficient and reliable, obtains applying more and more widely in fields such as modern petrochemical, generating, transports.Up-to-date " countries in the world record yearbook " statistics shows, within 2013, the operating oil gas transport line in the whole world has reached 3,560,000 kilometers, Chinese Petroliferous transport line length, also more than 13.4 ten thousand kilometers, carries the crude oil of 70% and the natural gas transportation task of 99%.
At present a lot of pipeline faces the typical damage puzzlements such as burn into wearing and tearing, causes that pipe wall is thinning, physical strength declines, and causes pipe leakage even explosion accident.China on Dec 12 Shanxi god's head Second Power Plant generation main steam line bursting accident in 2006, causes 2 people's death, 2 people is severely injured and equipment component is badly damaged.Within 2013, the yellow pipe laying in east, China Petrochemical Industry on November 22 Qingdao there occurs special significant explosion accident, pipe leakage crude oil enters municipal drainage closed conduit, in the closed conduit of stroke confined space, oil gas gathers and meets spark and blast, and causes that 62 people are dead, 136 people are injured, direct economic loss 7.5 hundred million yuan.In order to reduce the generation even avoiding this type of accident, the safety detection of pipeline is even more important.
At present, conventional pipeline non-destructive testing method mainly comprises ray detection, conventional ultrasound detection, Magnetic testing, Liquid penetrant testing and eddy current detection etc., but these detection methods come with some shortcomings and restrictive condition.Detection efficiency aspect, conventional ultrasound detects and eddy current detection belongs to pointwise detection mode, and length consuming time, efficiency are low; Restrictive condition aspect, conventional ultrasound detects the detection being mainly good at tube wall internal injury, Magnetic testing, Liquid penetrant testing and eddy current detection are then more prone to the detection of tube wall surface damage, and ray detection and Liquid penetrant testing two kinds of methods also exist operating safety.
Ultrasonic guided wave detecting method in tested pipeline, motivates the wavelength ultrasonic stress wave suitable with pipe thickness by detection probe, ultrasonic stress wave with close that inner and outer boundary occurs repeatedly to launch, transmission and refraction, and intercouple formation further can along the supersonic guide-wave of the long propagation of tube wall.The method is specially adapted to the efficient fast mass safety assessment of tubular structure, can in buried, immersion liquid, do not get rid of working medium, do not remove the complex detection environment such as clad under pipeline grown to the Non-Destructive Testing of distance total wall thickness, have that detecting distance is far away, total wall thickness detects, detection sensitivity is high, information integrity is high, detect the good remarkable advantage of adaptability.
The important component part of ultrasonic pipeline inspection equipment during pipe ultrasonic guided wave probe fixing device, the pipeline probe fixing device being usually used in Ultrasonic Detection is mainly divided into probe flexible fixing device and rigid fixation means, two kinds of devices are all by ensureing by the mode of external force to pop one's head in and the good contact of tube wall, thus the mechanical couplings performance of guarantee ultrasonic probe and tested pipeline.
Chinese patent CN2624208Y " pipe ultrasonic Guided waves dedicated probe and stationary installation thereof " discloses a kind of piezoelectric probe, this probe can be used for the piezoelectric ceramics replacing being pasted onto on pipeline, and manufacture and design at pipe surface static probe, make the mechanical hook-up that it can be easy for installation and removal.This stationary installation is at the probe set collar of diametric(al) with two attachable extending areas and annular casing shape, one of them probe set collar is provided with groove in a circumferential direction, be used for preventing pipe ultrasonic Guided waves dedicated probe, place each the rear portion detecting dedicated probe groove, have threaded hole to be used for installing and to execute stressed conventional compacting part to detection dedicated probe.But this probe and stationary installation can not adjust quantity and the installation site of probe, cannot select guided wave modal according to conduit types, and set of device also can only be applicable to the pipe detection of same diameter, and in the task that pipelines detects, cost is too high.
Summary of the invention
The purpose of this utility model is to solve current pipeline non-destructive testing Problems existing described above, provides a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device.
In order to reach above-mentioned utility model object, the utility model by the following technical solutions:
A kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device, comprise several contact units, for contact unit is fixed into annular array chain unit and for the end of probe of contact unit being fitted in the securing member in pipe under test.
As preferably, contact unit comprises mounting base, base, probe, pressing plate and finger plate; Mounting base comprises the flank of base plate and base plate both sides, and base plate is provided with probe hole, and flank offers foramen alare respectively; The top of pressing plate is provided with center pillar, is arranged with floating spring outside center pillar; The main body of finger plate is provided with fixed orifice, and both sides are provided with two wing plates; The bottom of probe is arranged on base through probe hole, and the top of probe and the bottom of pressing plate are connected, and the termination of center pillar is limited in the space pressing plate and finger plate through fixed orifice and by floating spring, two wing plates of finger plate embed in foramen alare respectively.
As preferably, the outside of flank is provided with a pointer, and the end of pointer and wing plate is connected, and the lateral wall of flank is provided with index dial.Pointer for showing probe incident angle, in conjunction with index dial for grasping the incident parameters of probe.
As preferably, the bottom of base is arc-shaped.
The bottom of arc-shaped fully can be combined with pipe under test, is convenient to probe and contacts with pipe under test better.
As preferably, the side bottom that described mounting base is positioned at probe hole is provided with a fixed head.
This fixed head is used for being fixed contact unit.
As preferably, described fixed head is provided with scroll wheel.
Scroll wheel can against the surface scrolls of pipe under test, is convenient to the movement of contact unit.
As preferably, described chain unit comprises opening chain and the tight locking button for being locked by opening chain, and described tight locking button comprises buckle, straight pin, tensioning plate and clamping screw; Buckle one end is connected with one end of opening chain, and the other end in main body is provided with a pair transverse holes; The main body of straight pin is provided with screw and in the transverse holes interted on buckle; One end downward bending of tensioning plate main body circularizes hook shape and the other end of opening chain is carried out snapping, the other end upwards bending of main body; Clamping screw, through one end of tensioning plate upwards bending, is connected with the screw on straight pin.
Because tight locking button can in any chain buckle locking of opening chain, the fixture length using opening chain and tight locking button to form in the present invention can arbitrarily be adjusted, to adapt to the pipe detection of different-diameter, simultaneously, multiple chain holes of opening chain all can be used as the mounting points of probe array element (contact unit), according to actual service condition adjustment probe array element specification, array element quantity and installation site, flexibility design can be realized.
As preferably, the hole pins that the short strip that described securing member comprises the long band of two ends bending pore-forming, both sides are provided with baffle plate, fastening bolt, main body are provided with the screw pin of screw, main body is provided with through hole, screw pin and hole pins lay respectively in the hole of long band two ends bending pore-forming, the two ends that short strip is placed in the long band being bent into annular form indentation, there, and fastening bolt is connected with screw pin through hole pins.
As preferably, be connected bottom described mounting base by resilient key with opening chain, described resilient key comprises the flanged (FLGD) pin in termination, and pin is provided with counterbore away from the main body of termination, is provided with limit spring and steel ball in counterbore, and steel ball is positioned at the top of limit spring.
Resilient key is equipped with the steel ball that can press down in diametric(al), ensure that the rapidity of handling and installs fixing reliability.Contact unit adopts modular design, is convenient to dismounting and replacing.
The mounting hole of multiple resilient key is provided with bottom mounting base.Suitable pin-and-hole can be selected, strong adaptability according to actual service condition.
Compared with prior art, beneficial effect is the utility model:
1 contact unit compact conformation of the present utility model, mechanical coupling effects are good;
2 devices of the present utility model are provided with a set of fast fixture, can realize quick despatch, easy disassembly, have higher detection efficiency;
3 devices of the present utility model are provided with one section of opening chain, the part in opening chain can be selected as the live part of installation contact unit according to actual conditions, thus can measure the pipeline of different tube diameters, have the feature of flexibility design;
4 devices of the present utility model have the feature of modular design, and contact unit, chain unit and fastener element can be arranged in pairs or groups according to service condition;
5 devices of the present utility model have the feature of flexibility design, can realize the quick adjustment of probe array element specification, array element quantity and probe incident angle multiple parameters;
6 devices of the present utility model are provided with angle index, clearly can show the incident angle of probe.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present utility model;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is linear transducer array schematic diagram of the present utility model;
Fig. 4 is the structural representation of contact unit of the present utility model;
Fig. 5 is the structural representation of chain unit of the present utility model;
Fig. 6 is the structural representation of resilient key of the present utility model.
In figure: 100 contact units, 200 chain units, 300 securing members, 400 pipe under test;
110 mounting bases, 120 bases, 130 probes, 140 pressing plates, 150 finger plates, 160 resilient keys;
111 base plates, 112 flanks, 113 probe holes, 114 foramen alares, 115 index dials, 116 fixed heads, 117 scroll wheels;
141 center pillars, 142 floating springs;
151 fixed orifices, 152 wing plates, 153 pointers;
161 pins, 162 counterbores, 163 limit spring, 164 steel balls;
210 opening chains, 220 tight locking buttons;
221 buckles, 222 straight pins, 223 tensioning plates, 224 clamping screws, 225 transverse holes;
311 long band, 312, short strip, 313 fastening bolts, 314 screw pins, 315 hole pins.
Embodiment
Below by specific embodiment, explanation is further described to the technical solution of the utility model.
If without specified otherwise, the raw material adopted in embodiment of the present utility model is the conventional raw material in this area, and the method adopted in embodiment, is the conventional method of this area.
Embodiment:
A kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device, as shown in Figure 1, Figure 2 and Figure 3, be that the ultrasonic longitudinal wave guide of the pipe under test 400 of Φ 128mm detects to external diameter, the securing member 300 comprise 6 contact units 100, being fitted in the end of probe of contact unit 100 in pipe under test 400 for the chain unit 200 and being used for contact unit 100 being fixed into annular array;
As shown in Figure 2, Figure 3 and Figure 4, contact unit 100 comprises mounting base 110, base 120, probe 130, pressing plate 140 and finger plate 150; As shown in Figure 4, mounting base 110 comprises the flank 112 of base plate 111 and base plate 111 both sides, and base plate 111 is provided with probe hole 113, and flank 112 offers foramen alare 114 respectively; The top of pressing plate 140 is provided with center pillar 141, is arranged with floating spring 142 outside center pillar 141; The main body of finger plate 150 is provided with fixed orifice 151, and both sides are provided with two wing plates 152; The bottom of probe 130 is arranged on base 120 through probe hole 113, the probe top of 130 and the bottom of pressing plate 140 are connected, the termination of center pillar 141 is through fixed orifice 151 and be limited in the space pressing plate 140 and finger plate 150 by floating spring 142, and two wing plates 152 of finger plate 150 embed in foramen alare 114 respectively.The outside of flank 112 is provided with a pointer 153, and pointer 153 is connected with the end of wing plate 152, and the lateral wall of flank 112 is provided with index dial 115.The bottom of base 120 is arc-shaped, contacts so that coordinate with pipe under test 400.
The side bottom that mounting base 110 is positioned at probe hole 113 is provided with a fixed head 116, and fixed head 116 is provided with scroll wheel 117.
As shown in Figure 2 and Figure 5, described chain unit 200 comprises opening chain 210 and the tight locking button 220 for being locked by opening chain 210, and described tight locking button 220 comprises buckle 221, straight pin 222, tensioning plate 223 and clamping screw 224; Buckle 221 one end is connected with one end of opening chain 210, and the other end in main body is provided with a pair transverse holes 225; The main body of straight pin 222 is provided with screw and in the transverse holes 225 interted on buckle 221; One end downward bending of tensioning plate 223 main body circularizes hook shape and the other end of opening chain 210 is carried out snapping, the other end upwards bending of main body; Clamping screw 224, through one end of tensioning plate 223 upwards bending, is connected with the screw on straight pin 222.
The hole pins 315 that the short strip 312 that securing member 300 comprises the long band 311 of two ends bending pore-forming, both sides are provided with baffle plate, fastening bolt 313, main body are provided with the screw pin 314 of screw, main body is provided with through hole, screw pin 314 and hole pins 315 lay respectively in the hole of long band 311 two ends bending pore-forming, the two ends that short strip 312 is placed in the long band 311 being bent into annular form indentation, there, and fastening bolt 313 is connected with screw pin 314 through hole pins 315.
Be connected with opening chain 210 by resilient key 160 bottom mounting base 110, as shown in Figure 6, described resilient key 160 comprises the flanged (FLGD) pin 161 in termination, pin 161 is provided with counterbore 162 away from the main body of termination, be provided with limit spring 163 and steel ball 164 in counterbore 162, steel ball 164 is positioned at the top of limit spring 163.
According to material and the dimensional parameters of pipeline to be detected, optimum detection mode can be obtained, detect the parameters such as frequency, incident angle, array elements number, detecting distance number by theoretical analysis.In the present embodiment, tubular outer diameter to be detected is 128mm, and linear transducer array quantity is 6.Opening chain and fast fixture is used to be arranged on pipeline outer circumference surface to be detected by 6 contact units, fast fixture is buckled in position suitable on chain, make it just can hold pipeline to be detected tightly, contact unit uses resilient key to be installed on opening chain, and the contact unit other end uses securing member to hold tightly.Select suitable probe mount according to incident angle, detect according to the optimal parameter obtained in theoretical analysis after installation.
After detection completes, loosening fasteners, extracts resilient key, takes off contact unit successively, unclamps fast lock and links closely, and takes off opening chain, can complete a pipe detection.
In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.
Claims (6)
1. a Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device, it is characterized in that, comprise several contact units (100), for contact unit (100) is fixed into annular array chain unit (200) and for the end of probe of contact unit (100) being fitted in the securing member (300) in pipe under test (400).
2. a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device according to claim 1, it is characterized in that, contact unit (100) comprises mounting base (110), base (120), probe (130), pressing plate (140) and finger plate (150);
Mounting base (110) comprises the flank (112) of base plate (111) and base plate (111) both sides, and base plate (111) is provided with probe hole (113), flank (112) offers respectively foramen alare (114);
The top of pressing plate (140) is provided with center pillar (141), is arranged with floating spring (142) outside center pillar (141);
The main body of finger plate (150) is provided with fixed orifice (151), and both sides are provided with two wing plates (152);
The bottom of probe (130) is arranged on base (120) through probe hole (113), the probe top of (130) and the bottom of pressing plate (140) are connected, the termination of center pillar (141) is through fixed orifice (151) and be limited in the space pressing plate (140) and finger plate (150) by floating spring (142), and two wing plates (152) of finger plate (150) embed in foramen alare (114) respectively.
3. a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device according to claim 1, it is characterized in that, the outside of flank (112) is provided with a pointer (153), pointer (153) is connected with the end of wing plate (152), and the lateral wall of flank (112) is provided with index dial (115).
4. a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device according to claim 1, it is characterized in that, described chain unit (200) comprises opening chain (210) and the tight locking button (220) for being locked by opening chain (210), and described tight locking button (220) comprises buckle (221), straight pin (222), tensioning plate (223) and clamping screw (224); Buckle (221) one end is connected with one end of opening chain (210), and the other end in main body is provided with a pair transverse holes (225); The main body of straight pin (222) is provided with screw and in the transverse holes (225) interted on buckle (221); One end downward bending of tensioning plate (223) main body circularizes hook shape and the other end of opening chain (210) is carried out snapping, the other end upwards bending of main body;
Clamping screw (224), through one end of tensioning plate (223) upwards bending, is connected with the screw on straight pin (222).
5. a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device according to claim 1, it is characterized in that, described securing member (300) comprises the long band (311) of two ends bending pore-forming, both sides are provided with the short strip (312) of baffle plate, fastening bolt (313), main body is provided with the screw pin (314) of screw, main body is provided with the hole pins (315) of through hole, screw pin (314) and hole pins (315) lay respectively in the hole of long band (311) two ends bending pore-forming, the two ends that short strip (312) is placed in the long band (311) being bent into annular form indentation, there, fastening bolt (313) is connected with screw pin (314) through hole pins (315).
6. a kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device according to claim 2, it is characterized in that, described mounting base (110) bottom is connected with opening chain (210) by resilient key (160), described resilient key (160) comprises the flanged (FLGD) pin in termination (161), pin (161) is provided with counterbore (162) away from the main body of termination, be provided with limit spring (163) and steel ball (164) in counterbore (162), steel ball (164) is positioned at the top of limit spring (163).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520536248.XU CN204925045U (en) | 2015-07-22 | 2015-07-22 | Flexible array detection probe unit of vertical guided wave of pipeline supersound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520536248.XU CN204925045U (en) | 2015-07-22 | 2015-07-22 | Flexible array detection probe unit of vertical guided wave of pipeline supersound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204925045U true CN204925045U (en) | 2015-12-30 |
Family
ID=54974159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520536248.XU Withdrawn - After Issue CN204925045U (en) | 2015-07-22 | 2015-07-22 | Flexible array detection probe unit of vertical guided wave of pipeline supersound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204925045U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021709A (en) * | 2015-07-22 | 2015-11-04 | 杭州电子科技大学 | Pipeline ultrasonic longitudinal guided wave flexible array detection probe apparatus |
| CN107490626A (en) * | 2017-06-19 | 2017-12-19 | 西安交通大学 | Array-type ultrasonic probe combined system, combined method and its detection method |
| CN107676636A (en) * | 2017-11-09 | 2018-02-09 | 内蒙古科技大学 | A kind of pipeline leakage testing sensor fastening device and fixing means |
| CN110095526A (en) * | 2019-06-06 | 2019-08-06 | 天津特米斯科技有限公司 | A kind of transient electromagnetic method probe apparatus |
-
2015
- 2015-07-22 CN CN201520536248.XU patent/CN204925045U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021709A (en) * | 2015-07-22 | 2015-11-04 | 杭州电子科技大学 | Pipeline ultrasonic longitudinal guided wave flexible array detection probe apparatus |
| CN105021709B (en) * | 2015-07-22 | 2017-10-27 | 杭州电子科技大学 | A kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device |
| CN107490626A (en) * | 2017-06-19 | 2017-12-19 | 西安交通大学 | Array-type ultrasonic probe combined system, combined method and its detection method |
| CN107490626B (en) * | 2017-06-19 | 2023-04-11 | 西安交通大学 | Array type ultrasonic probe combination system, combination method and detection method thereof |
| CN107676636A (en) * | 2017-11-09 | 2018-02-09 | 内蒙古科技大学 | A kind of pipeline leakage testing sensor fastening device and fixing means |
| CN107676636B (en) * | 2017-11-09 | 2019-05-10 | 内蒙古科技大学 | A kind of pipeline leakage testing sensor fixing means |
| CN110095526A (en) * | 2019-06-06 | 2019-08-06 | 天津特米斯科技有限公司 | A kind of transient electromagnetic method probe apparatus |
| CN110095526B (en) * | 2019-06-06 | 2024-04-02 | 天津特米斯科技有限公司 | Transient electromagnetic method probe device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105021709B (en) | A kind of Pipes Using Ultrasonic Longitudinal Guided-Wave flexible array detection probe device | |
| CN204925045U (en) | Flexible array detection probe unit of vertical guided wave of pipeline supersound | |
| CN101424663B (en) | Gas pipeline crack electromagnetical ultrasonic oblique wave guide detecting method | |
| US7240574B2 (en) | Sensors carrier for in-tube inspection scraper | |
| CN101762633B (en) | Method for rapidly detecting pipeline body defects | |
| CN1111738C (en) | Non-destructive evaluaion of pipes and tubes using magnetostrictive sensors | |
| US8091427B2 (en) | Nondestructive inspection apparatus and nondestructive inspection method using guided wave | |
| JP2019513217A (en) | Detection and monitoring of changes in metal structures using multimode acoustic signals | |
| CN103247358A (en) | High-energy pipeline local leakage monitoring test bed for nuclear power station | |
| CN111157624B (en) | Method for diagnosing damage state of inner bore of pipeline | |
| CN106768283A (en) | A kind of pipe ultrasonic guided wave on-line measuring device and detection method based on long range waveguide | |
| CN100390531C (en) | Gas pipeline leakage detecting and positioning method and system based on microwave technology | |
| CN204115684U (en) | A kind of elbow residual wall thickness pick-up unit | |
| CN107327713A (en) | The ultrasound damage device and method of a kind of water supply line | |
| CN206112523U (en) | Rigidity anchor clamps suitable for multiple pipe diameter supersound guided wave detects | |
| KR200446596Y1 (en) | The Acoustic Emission Signal Acquisition Assembly for Leak Detection of Closure Plug in Heavy Water Reactor | |
| CN108918285B (en) | Pipe section crushing device and test method thereof | |
| CN112228169B (en) | Split surface assembling method for high-pressure outer cylinder of nuclear turbine | |
| CN115076619A (en) | Gas pipeline ball valve internal leakage detection system based on acoustic emission technology | |
| KR100768390B1 (en) | Heat exchanger tube inspection device using guided ultrasonic wave | |
| CN207018827U (en) | A kind of ultrasound damage device of water supply line | |
| CN216955825U (en) | Elbow type nondestructive testing device | |
| CN215866491U (en) | Flexible detection device suitable for austenitic stainless steel pipe oxide deposit | |
| CN204758538U (en) | Supersound guided wave sensor suitable for power station pipeline safety monitoring | |
| CN216955824U (en) | Straight-through type nondestructive testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20171027 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20171027 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |