CN104502444A - Pipeline defect scanning device - Google Patents
Pipeline defect scanning device Download PDFInfo
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- CN104502444A CN104502444A CN201410718200.0A CN201410718200A CN104502444A CN 104502444 A CN104502444 A CN 104502444A CN 201410718200 A CN201410718200 A CN 201410718200A CN 104502444 A CN104502444 A CN 104502444A
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Abstract
The invention discloses a pipeline defect scanning device. The scanning device comprises four flexible shaft driving units, a scanning track adjusting mechanism, a permanent magnetic adsorption mechanism and an adjustable probe mechanism, wherein each flexible driving unit consists of a motor, a flexible shaft, a flexible shaft sleeve, a vehicle wheel group and a coupler; the scanning track adjusting mechanism consists of four vehicle wheel groups and a connecting plate; the permanent magnetic adsorption mechanism consists of two permanent magnet groups with opposite polarities and an armature; the magnetization directions of the magnets are perpendicular to the axis direction of a pipeline; the adjustable probe mechanism is a secondary adjusting mechanism, and a flat probe is used. A peripheral magnetization method is adopted for the device, and the longitudinal defects of the pipelines can be detected; the adjustable flat probe can be adaptive to the scanning of pipelines with multiple specifications; the device is adjustable in scanning track, novel in drive mode, compact in structure, small in size, light in weight, and can be widely applied to the defect scanning of pipelines.
Description
Technical field
The invention belongs to non-destructive detecting device field, be specifically related to a kind of device applying Magnetic Flux Leakage Inspecting principle scanning defect of pipeline.
Background technology
Pipeline has extremely important effect for the normal life of commercial production and people, in feedwater, draining, heat supply, gives gas, long distance delivery oil and natural gas, agricultural irrigation, obtains abundant application in hydraulic engineering and various commercial plant.Pipeline is subject to the impact of temperature, medium, stress and environment in long-term operation, can cause corrosion and material degradation, if effectively do not monitor or keep in repair, cause very large loss by enterprise.The more important thing is, pipe leakage and blast etc. will cause environment pollutes and harm greatly.
Publication number CN 1745985A patent document discloses a kind of heat exchanger heated surface pipe pick-up unit being directed to multi coil road composition.Authorization Notice No. CN 2747088Y patent document discloses a kind of single motor single driving straight wheel type small pipeline robot moving mechanism, is a kind of small diameter pipeline internal robot travel mechanism.Patent document discloses of publication number CN103712066 A is a kind ofly suitable for the outer leakage magnetic detection device of the pipe of industrial pipeline, what adopt is axial magnetized mode, transverse defect can only be detected, and be axial magnetized mode due to what adopt, in order to adapt to the pipe detection of different size, need the arcuate probe changing different size, inconvenient operation.
Summary of the invention
The object of the invention is to the deficiency existed for above-mentioned detection device, a kind of defect of pipeline scanning equipment is provided, this device can testing pipes longitudinal defect, and can adapt to the defect of pipeline scanning of plurality of specifications when changing probe, the scope that conveniently can realize each scanning covers whole pipeline simultaneously.
A kind of defect of pipeline scanning equipment provided by the invention, is characterized in that, this device comprises scanning path governor motion, magnetic sucking mechanism, adjustable probe mechanism and four cover driven by quill shaft unit;
Described scanning path governor motion, for changing the scanning path of defect of pipeline scanning equipment, realizes circumferential scan and spiral scanning; Scanning path governor motion is provided with the web joint for installing four cover driven by quill shaft unit and magnetic sucking mechanism; Described four cover driven by quill shaft unit lay respectively at the surrounding of the web joint upper surface of scanning path governor motion, for driving the motion of whole device;
Described magnetic sucking mechanism is arranged on below the web joint of scanning path governor motion, is provided with the magnet that direction of magnetization is vertical with conduit axis direction; Magnetic sucking mechanism, on the one hand for providing the magnetic field needed for Magnetic Flux Leakage Inspecting, is used for the absorption affinity that generator carries out needed for scanning along pipe surface on the one hand;
Adjustable probe mechanism is connected with magnetic sucking mechanism, utilizes the scanning of flat probe realization to whole defect of pipeline.
Compared with prior art, the invention has the advantages that:
1. scanning equipment adopts circumferential magnetization method, can the longitudinal defect of testing pipes, and adopts circumferential magnetization method that flat probe can be used to carry out the scanning of defect, and the pipeline for different size need not change probe, easy to operate.
2. apparatus of the present invention conveniently can change the scanning path of scanning equipment, and the scope that the pitch that can adjust scanning path can realize each scanning covers whole pipeline, so just without the need to increasing the device additionally turned to, to alleviate weight and the volume of whole device.
3. the probe positions of scanning equipment can regulate flexibly, and probe positions can up-down adjustment, therefore scanning equipment can adapt to the defect inspection demand of plurality of specifications.
4. scanning equipment adopts soft axle transmission, and whole apparatus structure is compact.As adopted soft axle transmission between motor and roller, motor can be made to be placed on above web joint directly need not be connected with wheel carrier, when not changing motor position, changing the not motion-affecting transmission in wheel carrier group position, making whole apparatus structure compact.
Accompanying drawing explanation
Fig. 1 is the structural representation of defect of pipeline scanning equipment;
Fig. 2 is driven by quill shaft unit and scanning path adjust structure schematic diagram;
Fig. 3 is wheel group structural representation;
Fig. 4 is magnetic sucking mechanism and adjustable probe schematic diagram;
Fig. 5 a is wheel carrier threaded hole hole system schematic diagram; B is web joint through hole hole system schematic diagram; C, d are wheel carrier and be connected plate hole system relative position schematic diagram;
Fig. 6 is the schematic diagram that the scope of a defect of pipeline scanning equipment scanning can cover whole pipeline.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, the explanation for these embodiments understands the present invention for helping, but does not form limitation of the invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
As shown in Figure 1, the defect of pipeline scanning equipment that example of the present invention provides comprises four cover driven by quill shaft unit 2, scanning path governor motion 3, magnetic sucking mechanism 4 and adjustable probe mechanism 5.
Scanning path governor motion 3 is provided with the web joint for installing four cover driven by quill shaft unit 2 and magnetic sucking mechanism 4, and scanning path governor motion 3, for changing the scanning path of defect of pipeline scanning equipment, realizes circumferential scan and spiral scanning.
Four cover driven by quill shaft unit 2 are positioned at the surrounding of scanning path governor motion 3, for driving the motion of whole device.
Magnetic sucking mechanism 4 is arranged on the below of scanning path governor motion 3, is provided with the magnet that direction of magnetization is vertical with conduit axis direction.Magnetic sucking mechanism 4 one aspect, for providing the magnetic field needed for Magnetic Flux Leakage Inspecting, is used on the one hand the absorption affinity that generator carries out needed for scanning along pipe surface;
Adjustable probe mechanism 5 is installed with magnetic sucking mechanism 4, utilizes flat probe to carry out the scanning of defect.
As shown in Figure 2 and Figure 3; often overlap driven by quill shaft unit by motor 25, first, second shaft coupling 23; 24, flexible axle 22, flexible shaft protecting 21 and motor support plate 26 form; motor 25 is connected with motor support plate 26 by screw; motor support plate 26 is fixed by screws on web joint 31, and motor 25 output shaft is connected with flexible axle 22 through the first shaft coupling 23, and flexible axle 22 is connected by the second shaft coupling 24 with wheel group 32; it is outside that flexible shaft protecting 21 is enclosed within flexible axle 22, plays the effect of protection flexible axle.
Scanning path governor motion 3 is made up of web joint 31 and four wheels 32 of harnessing an animal to a cart, four wheel carriers 321 of harnessing an animal to a cart wheels 32 are fixed by screws in the surrounding of web joint 31, by regulate often harness an animal to a cart perforate system of institute and web joint 31 hole on wheels 32 wheel carrier 321 be between relative position, the angle between the axis of wheel 322 and pipeline 1 axis can be changed, and then change scanning path, circumferential scan and spiral scanning can be realized.
As shown in Figure 3, wheel group 32 is made up of wheel carrier 321, wheel 322 and axletree 324.Wheel 322 and axletree 324 are arranged on wheel carrier 321 by deep groove ball bearing 323.Motor 25 rotates through flexible axle 22 and the second shaft coupling 24 direct drive of wheel 322.
By changing the relative position of wheel group 32 and web joint 31, conveniently can change the scanning path of scanning equipment, the pitch of adjustment scanning path is not more than the length of group of magnets on conduit axis direction, and the scanning scope that can realize each scanning covers whole pipeline.This mode, without the need to increasing the extra device controlling wheel group 32 and turn to, alleviates weight and the volume of whole device.
As shown in Figure 4, magnetic sucking mechanism 4 to be connected with web joint 31 by bolt and to be positioned at the below of web joint 31, it specifically comprises armature 41 and two permanent magnet groups 42,42 ', two permanent magnet groups 42,42 ' the both sides being fixed by screws in armature 41, armature 41 is connected by bolt 61, nut 63 and thrust ball bearing 62 with web joint 31.The polarity of two permanent magnet groups 42,42 ' is contrary, and the direction of magnetization of magnet is vertical with conduit axis direction, and rotating nut 63 up-down adjustment can be passed through in the position of armature 41, and thrust ball bearing 62 can make adjustment lighter; Adopt circumferential magnetization method, can the longitudinal defect of testing pipes.The pitch of adjustment scanning path is not more than the length of group of magnets on conduit axis direction,
Adjustable sonde configuration 5 is connected with the armature 41 in magnetic sucking mechanism 4 by screw, and is positioned at two permanent magnet groups 42, between 42 '.Adjustable sonde configuration 5 specifically comprises probe web joint 51, probe socket 52, spring 53 and flat probe 54.Probe web joint 51 has mounting hole, is connected by screw 64 with armature 52, probe web joint 51 is connected by screw with probe socket 52, and on flat probe 54, plane surrounding has circular hole, and circular hole, built with spring 53, is connected with probe socket 52 by spring 53.Flat probe 54 has waist type groove in two sides, be connected with probe socket 52 by holding screw.By the position of the position-adjustable flat probe 54 of set screw 64 and nut 63, and then the scanning of different size pipeline can be adapted to.Use flat probe to carry out the scanning of defect, the pipeline for different size need not change probe, easy to operate.
The present invention can change probe positions by changing the nut connecting armature 41 and web joint 31, and the use of thrust ball bearing 62 makes this adjustment lighter; Probe positions can also be changed by the position changing the screw connecting probe web joint 51 and armature 41.
As shown in Figure 5, a display be the threaded hole hole system schematic diagram that wheel carrier 321 is opened, b display be through hole hole system schematic diagram on web joint 31 relevant position corresponding with the threaded hole that a figure shows.C display be threaded hole 1,5,9 on wheel carrier 321 respectively with through hole on web joint 31 1 ', 5 ', 9 ' dead in line.Now the scanning path of this scanning equipment is circumferential scan.After the axis in wheel group 32 threadingly hole 9 rotates a certain angle, the hole system position view of wheel group 32 and web joint 31, the threaded hole 3,7,9 now on wheel carrier respectively with through hole on web joint 3 ', 7 ', 9 ' dead in line.Now the scanning path of this scanning equipment is spiral scanning.
According to the scanning path control method shown in accompanying drawing 5, the scanning scope that can realize single scanning covers whole pipeline, and control method is simple, does not need extra governor motion, simultaneously the invariant position of motor 25 in adjustment process.
As shown in Figure 6, magnetic box 42 is L along conduit axis direction length, line t be center probe scanning equipment in spiral scanning time scanning path, S is the pitch of this scanning path, as shown in Figure 6, when S is not more than L, then the scanning scope of this defect scanning equipment scanning can cover whole pipeline.
The course of work of this contrive equipment is as follows: first it correctly assembled according to the position of each ingredient of device and annexation before detection, secondly the helix angle of suitable scanning path is determined according to detection demand, and then change the relative position of web joint and wheel carrier and be screwed, then this device is placed on pipeline, adjustment magnetizing assembly and probe are to correct position, and the stray field signal that the defect below flat probe is formed will be detected by flat probe.This device of power drives is provided to move to motor, along with the movement of whole device, the stray field signal that defect below flat probe scanning path is formed will be detected by flat probe, by analyzing the signal received in flat probe scanning process, defect of pipeline situation can be obtained, and then complete the scanning of defect of pipeline.It must be noted that, this scanning equipment is not merely applicable to the defect scanning of pipeline, and for the defect scanning of in-service cable and horizontal tank, this device is applicable equally.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the content disclosed in this embodiment and accompanying drawing.The equivalence completed under not departing from spirit disclosed in this invention so every or amendment, all fall into the scope of protection of the invention.
Claims (7)
1. a defect of pipeline scanning equipment, is characterized in that, this device comprises scanning path governor motion (3), magnetic sucking mechanism (4), adjustable probe mechanism (5) and four covers driven by quill shaft unit (2);
Described scanning path governor motion (3), for changing the scanning path of defect of pipeline scanning equipment, realizes circumferential scan and spiral scanning; Scanning path governor motion (3) is provided with the web joint (31) for installing four cover driven by quill shaft unit (2) and magnetic sucking mechanism (4); Described four covers driven by quill shaft unit (2) lay respectively at the surrounding of the web joint (31) of scanning path governor motion (3), for driving the motion of whole device;
Described magnetic sucking mechanism (4) is arranged on web joint (31) below of scanning path governor motion (3), is provided with the magnet that direction of magnetization is vertical with conduit axis direction; Magnetic sucking mechanism (4), on the one hand for providing the magnetic field needed for Magnetic Flux Leakage Inspecting, is used for the absorption affinity that generator carries out needed for scanning along pipe surface on the one hand;
Adjustable probe mechanism (5) is connected with magnetic sucking mechanism (4), utilizes the scanning of flat probe realization to whole defect of pipeline.
2. defect of pipeline scanning equipment according to claim 1, it is characterized in that, described driven by quill shaft unit is by motor (25), first, second shaft coupling (23, 24), flexible axle (22), flexible shaft protecting (21) and motor support plate (26) composition, motor (25) is connected with motor support plate (26), motor support plate (26) is fixed on web joint (31), motor (25) output shaft is connected with flexible axle (22) through the first shaft coupling (23), flexible axle (22) is connected by the second shaft coupling (24) with wheel group (32), it is outside that flexible shaft protecting (21) is enclosed within flexible axle (22), play the effect of protection flexible axle.
3. defect of pipeline scanning equipment according to claim 1, it is characterized in that, described scanning path governor motion (3) is made up of described web joint (31) and four wheels (32) of harnessing an animal to a cart, four wheel carriers (321) of harnessing an animal to a cart wheels (32) are fixed on the surrounding of web joint (31), by changing wheel group (32) and the relative position of web joint (31), the scanning path of scanning equipment conveniently can be changed.
4. the defect of pipeline scanning equipment according to claim (3), it is characterized in that, wheel group (32) is by wheel carrier (321), wheel (322) and axletree (324) composition, wheel (322) and axletree (324) are arranged on wheel carrier (321) by deep groove ball bearing (323), motor (25) rotates through flexible axle (22) and the second shaft coupling (24) direct drive of wheel (322), wheel carrier (321) to have hole upper with web joint (31) be the hole of mating is, by regulating its relative position, the angle between the axis of wheel (322) and pipeline (1) axis can be changed, and then change scanning path, realize circumferential scan and spiral scanning.
5. according to described defect of pipeline scanning equipment arbitrary in Claims 1-4, it is characterized in that, magnetic sucking mechanism (4) comprises armature (41) and two permanent magnet groups (42, 42 '), two permanent magnet groups (42, 42 ') both sides of armature (41) are fixed on, armature (41) and web joint (31) are by bolt (61), nut (63) is connected with thrust ball bearing (62), two permanent magnet groups (42, 42 ') polarity is contrary, the position of armature (41) is by rotating nut (63) up-down adjustment, thrust ball bearing (62) makes adjustment lighter, the direction of magnetization of magnet is vertical with conduit axis direction, adopt circumferential magnetization mode with the longitudinal defect of testing pipes, the pitch of adjustment scanning path is less than or equal to the length of group of magnets on conduit axis direction, covers whole pipeline with the scanning scope realizing each scanning.
6. according to described defect of pipeline scanning equipment arbitrary in Claims 1-4, it is characterized in that, adjustable sonde configuration (5) is connected with the armature (41) in magnetic sucking mechanism (4), and be positioned between two permanent magnet groups (42,42 ').
7. according to described defect of pipeline scanning equipment arbitrary in Claims 1-4, it is characterized in that, adjustable sonde configuration (5) comprises probe web joint (51), probe socket (52), spring (53) and flat probe (54), probe web joint (51) has the mounting hole of the armature (52) for connecting, probe web joint (51) is connected with probe socket (52), the upper plane surrounding of flat probe (54) has circular hole, circular hole, built with spring (53), is connected with probe socket (52) by spring (53); Flat probe (54) has waist type groove in two sides, be connected with probe socket (52) by holding screw; By the position of set screw (64) and nut (63) to regulate the position of flat probe (54), and then adapt to the scanning of different size pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718200.0A CN104502444B (en) | 2014-12-01 | 2014-12-01 | A kind of defect of pipeline scanning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718200.0A CN104502444B (en) | 2014-12-01 | 2014-12-01 | A kind of defect of pipeline scanning equipment |
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| CN104502444A true CN104502444A (en) | 2015-04-08 |
| CN104502444B CN104502444B (en) | 2017-12-29 |
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| CN201410718200.0A Expired - Fee Related CN104502444B (en) | 2014-12-01 | 2014-12-01 | A kind of defect of pipeline scanning equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105546359A (en) * | 2016-01-20 | 2016-05-04 | 合肥中大检测技术有限公司 | Convenient online constant magnetic detection device for pressure-bearing industrial pipeline |
| CN109100418A (en) * | 2018-08-21 | 2018-12-28 | 华中科技大学 | Nonferromagnetic pipeline Pulsed eddy current testing scanning equipment |
| CN109580785A (en) * | 2017-09-29 | 2019-04-05 | 上海金艺检测技术有限公司 | Scanning tooling and method for turbine blade root defect |
| CN110295544A (en) * | 2019-07-29 | 2019-10-01 | 武汉冠油科技有限公司 | A kind of rotation detecting bridge cable outer cross section shape is creeped detector |
| CN111766293A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气集团有限公司 | Multi-specification continuous pipe defect detection device |
| WO2020258895A1 (en) * | 2019-06-28 | 2020-12-30 | 苏州大学 | Magnetic flux leakage detection probe with high sensitivity |
| CN113588775A (en) * | 2020-04-30 | 2021-11-02 | 新疆金风科技股份有限公司 | Detection device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546359A (en) * | 2016-01-20 | 2016-05-04 | 合肥中大检测技术有限公司 | Convenient online constant magnetic detection device for pressure-bearing industrial pipeline |
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| CN109580785A (en) * | 2017-09-29 | 2019-04-05 | 上海金艺检测技术有限公司 | Scanning tooling and method for turbine blade root defect |
| CN109100418A (en) * | 2018-08-21 | 2018-12-28 | 华中科技大学 | Nonferromagnetic pipeline Pulsed eddy current testing scanning equipment |
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| CN111766293A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气集团有限公司 | Multi-specification continuous pipe defect detection device |
| WO2020258895A1 (en) * | 2019-06-28 | 2020-12-30 | 苏州大学 | Magnetic flux leakage detection probe with high sensitivity |
| CN110295544A (en) * | 2019-07-29 | 2019-10-01 | 武汉冠油科技有限公司 | A kind of rotation detecting bridge cable outer cross section shape is creeped detector |
| CN110295544B (en) * | 2019-07-29 | 2024-02-06 | 武汉冠油科技有限公司 | Rotary crawling detector for detecting external cross section shape of bridge inhaul cable |
| CN113588775A (en) * | 2020-04-30 | 2021-11-02 | 新疆金风科技股份有限公司 | Detection device |
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