CN102830158B - Bend pipe damage scanning and detecting apparatus based on magnetic memory effect - Google Patents

Bend pipe damage scanning and detecting apparatus based on magnetic memory effect Download PDF

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Publication number
CN102830158B
CN102830158B CN201210313701.1A CN201210313701A CN102830158B CN 102830158 B CN102830158 B CN 102830158B CN 201210313701 A CN201210313701 A CN 201210313701A CN 102830158 B CN102830158 B CN 102830158B
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China
Prior art keywords
bend pipe
magnetic memory
mobile platform
car
travelling frame
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CN201210313701.1A
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Chinese (zh)
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CN102830158A (en
Inventor
孙文勇
张来斌
胡家顺
樊建春
牛蕴
温东
吴祚祥
赵坤鹏
杨光福
孙秉才
李娜
张喜明
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中国石油天然气集团公司
中国石油集团安全环保技术研究院
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Priority to CN201210313701.1A priority Critical patent/CN102830158B/en
Publication of CN102830158A publication Critical patent/CN102830158A/en
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Abstract

The invention discloses a bend pipe damage scanning and detecting apparatus based on magnetic memory effect, which comprises a moving platform assembly, a pipe gripper and a detection dolly, the moving platform assembly comprises a movable platform, a platform support and a driving motor; the pipe gripper enables pin joint with a connecting block of the platform support through a support frame, the pipe gripper comprises an installation seat, a screw capable of telescoping along the vertical direction, a movable rack and a pair of clamping arms, the screw drives the movable rack and drives the clamping arm for opening and closing; the detection dolly comprises a dolly body, a magnetic memory detection sensor, two touch rollers and a swing rod, one end of the swing rod is hinged to the dolly body, the other end penetrates a rotating shaft, a convex loop is provided at the central part of the swing rod, a spring is provided between the convex loop and the bottom of the rotating shaft. According to the invention, the detection is carried out on the external part of the bend pipe, the stress concentration position and the stress concentration degree can be accurately detected, thereby the erosion status of the bend pipe can be determined, the prevention at early stage and diagnosis can be reached, and the generation of great safety accident can be avoided.

Description

A kind of damage of the bend pipe based on Metal magnetic memory scanning detection apparatus

Technical field

The present invention relates to a kind of the cannot-harm-detection device, particularly relate to a kind of bend pipe based on Metal magnetic memory damage scanning detection apparatus, belong to oil gas drilling and production technology field, be mainly used in affecting by the complex working condition such as erosion, stress the detection that stress and damage are carried out in comparatively serious bend pipe position in the high-tension apparatus of ground.

Background technology

In oil gas drilling process, high-tension apparatus due to ground bears to transfer the huge tension and compression effect of stress caused up to the pressure of tens of MPa even up to a hundred, the washing away of high-speed motion solid phase particles, flow-induced corrosion, temperature and pressure surge and roundabout manifold, causes high-pressure pipe member very easily to produce wall thickness reduction, stress corrosion, acid etching and erosion.This phenomenon especially shows the most obvious at bend pipe or reducing region.Under dynamic stress repeatedly and fluid scouring at a high speed, bend pipe position is often very easily brought out fatigue crack, stress corrosion cracking (SCC) or is produced stress corrosion hole, and causes piercing through or breaking of bend pipe, causes high-pressure fluid to leak, causes the generation of great accident.Therefore realize the early detection at bend pipe position, the generation of the accident that prevents an accident is of crucial importance.

At present, have a lot for bend pipe detection method, as outward appearance detection, Ultrasonic Detection, Magnetic testing and acoustic emission testing technology etc.But above-mentioned several detection technique can detect the gross imperfections such as the trommel that the erosion corrosion of bend pipe surfaces externally and internally crackle and inwall causes.In other words, namely just could prediction occurring when rear or generation appear in the defects such as crackle.In addition, above-mentioned several detection method implementation mostly is and manually detects or fixed on-line checkingi, and the detection especially for complex structure parts such as bend pipes adopts the method (as Magnetic testing, Liquid penetrant testing etc.) manually detected more.And magnetic memory detection technology is the new detecting method concentrated based on stress, it effectively can detect the region of stress concentration of bend pipe, macroscopical linear discontinuities of bend pipe inside and outside wall, the high-pressure pipe member common deficiency such as etch pit and wall thickness wearing and tearing are judged accurately, the defect of the microcosmic of bend pipe can be detected again, look-ahead and monitoring are carried out to bend pipe defect germinating region, the effective safe handling ensureing bend pipe position.

The method of existing Magnetic memory testing many employings Scanning Detction, this just needs detecting sensor can move along surface of the work with given speed, simultaneously for ensureing the accuracy of testing result, require that the lift-off value of detecting sensor and workpiece keeps constant, this detects for bend pipe exists certain difficulty, easily causes Detection results not accurate enough.

Summary of the invention

The object of this invention is to provide one can to the early diagnosis of bend pipe site tissue damage and prediction, and prevention bend pipe pierces through and breaks, the damage of the bend pipe based on the Metal magnetic memory scanning detection apparatus avoiding serious accident to occur.

For achieving the above object, the present invention proposes a kind of bend pipe based on Metal magnetic memory damage scanning detection apparatus, comprise: mobile platform assembly, comprise mobile platform, platform support and drive motor, described platform support comprises leading screw, the feed screw nut of the movement that matches with described leading screw and be located at the contiguous block at described leading screw two ends; Described mobile platform is by described feed screw nut along described leading screw translation, and described drive motor drives described screw turns; Tube gripper, by the contiguous block pivot joint of bracing frame and described platform support, described tube gripper comprises: mount pad; Run through described mount pad and the screw rod that can longitudinally stretch; The upper end of described screw rod is connected with handwheel, and its bottom connects travelling frame, and the elongated slot that the both sides of a pair clamping limb and described travelling frame are offered is hinged, and described screw rod drives described travelling frame longitudinally move back and forth and drive described clamping limb opening and closing; Detect dolly, be located at the below of described mobile platform assembly, comprise: car body; Be arranged at the Magnetic memory testing sensor of described car body bottom side; Two contact wheels, the both sides being arranged at described car body can rotated by the axletree running through described car body; Fork, its one end is articulated with on described car body, and its other end runs through the turning axle of horizontally set on described mobile platform, is provided with bulge loop at the middle part of described fork, between described bulge loop with the bottom surface of described turning axle, abutted spring.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, described screw rod and sliding sleeve threaded engagement, the longitudinal sliding motion of described sliding sleeve energy through described mount pad, an adjusting bolt to be stretched in described mount pad by the sidewall of described mount pad and can be resisted against on the outer wall of described sliding sleeve; Be provided with flange collar in described sliding sleeve upper end, between described flange collar with the upper surface of described mount pad, abut Compress Spring.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, clamping limb described in two is bending-like and is oppositely arranged, one end of clamping limb described in two is articulated with in the elongated slot of described travelling frame both sides respectively, its other end is provided with locating piece, and the bending part of described two clamping limbs is articulated with the two side ends of described mount pad respectively.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, flexible locating piece assembly is connected with at the subjacent of described travelling frame, described flexible locating piece assembly comprises: longitudinally sliding is arranged in the expansion link of described travelling frame bottom, described expansion link lower end connects locating piece, one caging bolt is stretched in described travelling frame by the sidewall of described travelling frame and also can be resisted against on described expansion link, has abutted Compress Spring in the bottom surface of described travelling frame with between the upper surface of described locating piece.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, the bottom of described screw rod is provided with and convexly connects end, the upper end of described travelling frame is provided with and holds the described convex storage tank connecing end, have cover plate at the described convex end upper press cover that connects, the upper surface bolt of described cover plate and described travelling frame is fixed.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, be provided with two guide rods in the both sides of described leading screw, described guide rod run through described mobile platform and and be provided with bearing between described mobile platform, the two ends of described guide rod connect with the contiguous block at described leading screw two ends respectively.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, outside the contact wheel of described detection dolly, be connected with Bus-Speed Monitoring element.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, outside the front and back side direction of described car body, be convexly equipped with bearing bridge, described bearing bridge is provided with the rolling bearing that can rotate, the axis of described rolling bearing and the axis being parallel of described contact wheel.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, described car body is provided with four forks, the two ends, front side that wherein two forks are articulated with described car body form the first fork group, the rear side two ends that another two forks are articulated with described car body form the second fork group, the first turning axle through horizontally set on described mobile platform that described first fork group is slided, the second turning axle through horizontally set on described mobile platform that described second fork group is slided.

As above based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, wherein, described first turning axle is provided with limit base, and described limit base is fixedly connected with described mobile platform, described first fork group slip through described limit base; Or be provided with limit base on described second turning axle, described limit base is fixedly connected with described mobile platform, described second fork group slide through described limit base.

Compared with prior art, the present invention has following characteristics and advantage:

1, the present invention detects bend pipe according to Magnetic memory testing principle, can realize the early stage judge to bend pipe damage, adopts the form of spring backup, fully can ensure Magnetic memory testing sensor and bend pipe close contact, avoid Lift-off effect on the impact of measurement result.

2, the present invention adopts the form of rectilinear scanning, and by encoder feedback control step motor, the uniform speed scanning realizing detecting the relative bend pipe of dolly detects, and reduces the non-constant impact on measurement result of measuring speed, reduces the difficulty of signal post analysis process.

3, the present invention adopts tube gripper to fix mobile platform assembly in elbow curvature plane, can carry out Scanning Detction to the most obvious curved outside of bend pipe damage.Meanwhile, this tube gripper is convenient to operation, can reduce and detect setup time.

Accompanying drawing explanation

Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.

Structural representation when Fig. 1 is bend pipe of the present invention damage scanning detection apparatus use;

Fig. 2 is the perspective view of tube gripper of the present invention;

Fig. 3 is that the master of tube gripper of the present invention looks cross-sectional view;

Fig. 4 is mobile platform assembly of the present invention and detection dolly unitized construction schematic diagram;

Fig. 5 is the main TV structure schematic diagram of detection dolly of the present invention;

Fig. 6 be detection dolly of the present invention look up structural representation.

Description of reference numerals:

10-tests bend pipe;

1-mobile platform assembly; 101-mobile platform; 102-platform support; 103-drive motor; 104-leading screw; 105-contiguous block; 106-turning axle; 107-guide rod; 108-bearing; 111-first turning axle; 112-second turning axle; 113-limit base;

2-tube gripper; 201-mount pad; 202-screw rod; 203-moves about frame; 204-clamping limb; 205-handwheel; 206-sliding sleeve; 207-adjusting bolt; 208-flange collar; 209-Compress Spring; 210-elongated slot; 211-locating piece; 212-expansion link; 213-locating piece; 214-caging bolt; 215-Compress Spring; 216-is convex connects end; 217-storage tank; 218-cover plate;

3-detects dolly; 301-car body; 302-contact wheel; 303-Magnetic memory testing sensor; 304-fork; 305-bulge loop; 306-spring; 307-scrambler; 308-bearing bridge; 309-rolling bearing; 311-first fork group; 312-second fork group;

4-bracing frame.

Embodiment

By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.

Please refer to Fig. 1 to Fig. 6, be respectively structural representation when bend pipe of the present invention damage scanning detection apparatus uses; Perspective view and the master of tube gripper look cross-sectional view; Mobile platform assembly of the present invention and detection dolly unitized construction schematic diagram; And the main TV structure schematic diagram of detection dolly of the present invention and look up structural representation.As shown in the figure, the damage of the bend pipe based on the Metal magnetic memory scanning detection apparatus that the present invention proposes, comprises mobile platform assembly 1, tube gripper 2 and detects dolly 3, wherein:

As shown in Figure 1, mobile platform assembly 1 comprises mobile platform 101, platform support 102 and drive motor 103, platform support 102 comprises leading screw 104, the feed screw nut (not shown) of the movement that matches with leading screw 104 and be located at the contiguous block 105 at leading screw 104 two ends.Leading screw 104 matches with feed screw nut formation screw pair, and drive motor 103 is connected with leading screw 104, rotates to drive leading screw 104.By the rectilinear motion that feed screw nut adjutant drive motor 103 convert rotational motion is mobile platform 101.Mobile platform 1 can be slidably arranged on leading screw 104 by feed screw nut, makes mobile platform 1 can along leading screw 104 translation.

As shown in Figure 2,3, tube gripper 2 is by contiguous block 105 pivot joint of bracing frame 4 with platform support 102, and in the present embodiment, two tube gripper 2 symmetries are articulated on the bracing frame 4 of platform support 102 both sides, play the effect of clamping test bend pipe 10.This tube gripper 2 comprises: mount pad 201, screw rod 202, travelling frame 203, a pair clamping limb 204, what screw rod 202 can longitudinally stretch runs through mount pad 201, the upper end of screw rod 202 is connected with handwheel 205, its bottom connects travelling frame 203, by artificial turn handwheel 205, screw rod 202 is longitudinally stretched relative to mount pad 201, thus drive travelling frame 203 longitudinally elevating movement.At this as shown in Figure 2,3, in an optional embodiment of the present invention, sliding sleeve 206 is set with at screw rod 202 outer wall, sliding sleeve 206 and screw rod 202 threaded engagement, sliding sleeve 206 can longitudinal sliding motion through mount pad 201, adjusting bolt 207 to be stretched in mount pad 201 by the sidewall of mount pad 201 by the threaded hole on mount pad 201 and can be resisted against on the outer wall of sliding sleeve 206, plays the effect of locating sliding sleeve 206.Be provided with flange collar 208 in 206 sliding sleeve upper ends, between flange collar 208 and the upper surface of mount pad 202, abut Compress Spring 209.When adjusting bolt 207 departs from sliding sleeve 206, under the resilient force of Compress Spring 209, realize sliding sleeve 206, screw rod 202 and travelling frame 203 together on propose movement.Certainly, as another optional embodiment of the present invention, screw rod 202 and mount pad 201 also can adopt threaded engagement, make longitudinally to be stretched relative to mount pad 201 by turn handwheel 205 drive screw 202, thus drive travelling frame 203 longitudinally elevating movement.The concrete fit structure of the present invention to screw rod 202 and mount pad 201 is not restricted, as long as can realize the flexible of screw rod 202, drives travelling frame 203 longitudinally elevating movement.On the elongated slot 210 that the both sides that a pair clamping limb 204 is articulated with travelling frame 203 are respectively offered, when travelling frame 203 longitudinally lifting moving time, travelling frame 203 drives clamping limb 204 opening and closing, realizes the function of holding test bend pipe 10 tightly.

As shown in Figure 4,5, 6, detect the below that mobile platform assembly 1 is located at by dolly 3, moved along the outer wall of test bend pipe 10 by the mobile detection dolly 3 that drives of mobile platform.This detection dolly 3 comprises car body 301, two contact wheel 302, Magnetic memory testing sensor 303 and fork 304, wherein: the both sides being arranged at car body 301 that two contact wheels 302 can be rotated by the axletree running through car body 301, the outline of contact wheel 302 contacts with the outer wall of test bend pipe 10.Magnetic memory testing sensor 303 is arranged at car body 301 bottom side (as shown in Figure 6), carries out lossless decomposition based on Metal magnetic memory to bend pipe.One end of fork 304 is articulated with on car body 301, its other end runs through the turning axle 106 of horizontally set on mobile platform 101, turning axle 106 is connected on mobile platform 101, can rotate by relative movement platform 101, by fork 304, mobile platform 101 and car body 301 are linked together, be provided with bulge loop 305 at the middle part of fork 304, between bulge loop 305 and the bottom surface of turning axle 106, abut spring 306.Like this, when detecting the outer wall of dolly 3 along test bend pipe 10 and walking, under the effect of the elastic force of spring 306, fork 304 applies pressure to detection dolly 3, the outline of two contact wheels 302 is made to be adjacent to the outer wall of test bend pipe 10 all the time, ensure that contact wheel contacts all the time with bend pipe, reach the object ensureing that lift-off value is constant.Detect dolly 3 simultaneously and also apply reacting force to fork 304, make fork 304 regulate flexible with the movement locus of detection dolly 3, swing around turning axle 106 simultaneously, realize the function that the outer wall walking of test bend pipe 10 is close to by detection dolly 3.

In the present invention, as shown in Figure 2,3, two clamping limbs 204 are bending-like and are oppositely arranged, and one end of two clamping limbs 204 is articulated with in the elongated slot 210 of travelling frame 203 both sides respectively, makes two clamping limbs 204 have certain rotation surplus; Its other end is provided with locating piece 211, for clamping test bend pipe 10.The bending part of two clamping limbs 204 is articulated with the two side ends of mount pad 201 respectively, two clamping limbs 204 is rotated around the articulated position of two clamping limb 204 bending parts under the effect of travelling frame 203 elevating movement, thus realizes the opening and closing function of two clamping limbs 204.

Further, as shown in Figure 3, in order to make tube gripper more solid and reliable clamp test bend pipe 10, flexible locating piece assembly is connected with at the subjacent of travelling frame 203, this flexible locating piece assembly comprises: expansion link 212, locating piece 213, caging bolt 214 and Compress Spring 215, wherein: expansion link 212 longitudinally slides and is arranged in the bottom of travelling frame 203, expansion link 212 lower end connects locating piece 213, caging bolt 214 threaded hole passed through on travelling frame 203 is stretched into by the sidewall of the frame 203 that moves about and also can be resisted against on expansion link 212 in travelling frame 203, play the effect of location expansion link 212.Between the bottom surface and the upper surface of locating piece 213 of travelling frame 203, abut Compress Spring 215, be pressed on test bend pipe 10 to promote locating piece 213.Moved by the longitudinal extension of expansion link 212, drive locating piece 213 to move up and down, locating piece 211 acting in conjunction of locating piece 213 and two clamping limb 204 lower ends is clamped and tests bend pipe 10, improve the firm reliability of clamping.

Further, as shown in Figure 3, in order to ensure that screw rod 202 and travelling frame 203 are easy to connect and firm, the bottom of screw rod 202 is provided with and convexly connects end 216, the upper end of travelling frame 203 is provided with and holds the convex storage tank 217 connecing end 216, has cover plate 218 at convex end 216 upper press cover that connects, and cover plate 218 is fixed with the upper surface bolt of travelling frame 203, thus the convex end 216 that connects is fixed in storage tank 217, realize the connection of screw rod 202 and travelling frame 203.Certainly, screw rod 202 and travelling frame 203 also can adopt other known connected modes, as long as ensure that screw rod 202 and travelling frame 203 have enough strength of joint, the present invention is not restricted this.

In the present invention, as shown in Fig. 1,4, two guide rods 107 are provided with in the both sides of leading screw 104, guide rod 107 run through mobile platform 101 and and be provided with bearing 108 between mobile platform 101, the two ends of guide rod 107 connect with the contiguous block 105 at leading screw 104 two ends respectively, mobile platform 101 is slided along guide rod 107, and guide rod 107 plays the effect of guiding.

As shown in Figure 4,5, 6, outside the contact wheel 302 detecting dolly 3, Bus-Speed Monitoring element is connected with, i.e. scrambler 307.Scrambler 307 is connected with contact wheel 302, can obtain and detect dolly actual speed, and then feedback regulation drive motor 103 rotating speed, realizes detecting dolly 3 along bend pipe uniform speed scanning.

As shown in Figure 4,5, 6, outside the front and back side direction of car body 301, be convexly equipped with bearing bridge 308, bearing bridge 308 is provided with the rolling bearing 309 that can rotate, the axis of rolling bearing 309 and the axis being parallel of contact wheel 302.Like this, under the effect of the spring 306 on fork 304, car body 301 with bend pipe angle around axletree swing, make the outer wall having a rolling bearing 309 engaged test bend pipe 10 in two rolling bearings 309 of both sides before and after car body 301 at least, this ensures that there and detect dolly 3 in the process of motion, two contact wheels 302 and rolling bearing 309 and test bend pipe 10 outer wall three point contact, thus improve the stability detecting dolly 3 and run, make the lift-off value between Magnetic memory testing sensor 303 and test bend pipe 10 constant.

As shown in Figure 4, car body 301 is provided with four forks 304, the two ends, front side that wherein two forks 304 are articulated with car body 301 form the first fork group 311, the rear side two ends that another two forks 304 are articulated with car body 301 form the second fork group 312, the second turning axle 112 of 101 horizontally sets on mobile platform slided through the first turning axle 111, second fork group 312 of horizontally set on mobile platform 101 that first fork group 311 is slided.In detection dolly 3 walking process, the first fork group 311 and the second fork group 312 adjust the operation angle detecting dolly 3 by telescopic moving on the first turning axle 111 and the second turning axle 112, complete and detect the walking of dolly 3 on bend pipe.

As shown in Figure 4, as of the present invention one preferred embodiment, first turning axle 111 is provided with limit base 113, limit base 113 is fixedly connected with mobile platform 101, first fork group 311 slide through limit base 113, limit base 113 lower plane compresses the first turning axle 111, to limit the rotation of the first turning axle 111.Certainly, also can be provided with limit base 113 on the second turning axle 112, limit base 113 is fixedly connected with mobile platform 101, second fork group 312 slide through limit base 113, to limit the rotation of the second turning axle 112.During detection, limit base 113 can be utilized to limit one of two turning axles, make fork on this turning axle all the time perpendicular to mobile platform 101, and can only move along the direction perpendicular to mobile platform 101, make to detect dolly 3 steady along moving in bent pipe, and be convenient to the speed controlling detection dolly 3.

The present invention can be used for concentrating etc. the microdefect at high-tension apparatus bend pipe position, ground and stress detecting.Its concrete using method is as follows: first, connects tube gripper 2 and mobile platform assembly 1 by bracing frame 4, and regulates the handwheel 205 of tube gripper 2 and the position of locating piece 211,213 according to bend pipe diameter dimension.Then, tube gripper 2 is fixed on the straight tube position at bend pipe two ends, now under the effect of Compress Spring 209, two clamping limb 204 armfuls of tube gripper 2 is at bend pipe two ends, the position of adjustment clamping limb 204 ensures that mobile platform 101 is in elbow curvature plane, and suitable control hand wheel 205 is to guarantee that tube gripper 2 is installed firmly.In addition, also need to ensure that detecting dolly 3 fits tightly with tube wall, and then avoid lift-off effect on the impact of testing result.Finally, by scrambler 307 FEEDBACK CONTROL drive motor 103, detection dolly 3 is at the uniform velocity moved outside bend pipe, and obtain relevant magnetic memory detecting signal.By carrying out the degree situation that analyzing and processing show that outside bend pipe, region of stress concentration and stress are concentrated to signal, and then early diagnosis and the object of prediction of bend pipe damage is realized by the analysis of counter stress situation, to what avoid serious accident, there is larger engineering and practical application meaning.

For the detailed explanation of the respective embodiments described above, its object is only to make an explanation to the present invention, so that the present invention can be understood better, but, it is limitation of the present invention that these descriptions can not become with any explanation, particularly, each feature described in various embodiments also can combination in any mutually, thus form other embodiments, except there being clearly contrary description, these features should be understood to can be applied in any one embodiment, and are also not only confined to described embodiment.

Claims (10)

1., based on a bend pipe damage scanning detection apparatus for Metal magnetic memory, it is characterized in that, described device comprises:
Mobile platform assembly, comprises mobile platform, platform support and drive motor, and described platform support comprises leading screw, the feed screw nut of the movement that matches with described leading screw and be located at the contiguous block at described leading screw two ends; Described mobile platform is by described feed screw nut along described leading screw translation, and described drive motor drives described screw turns;
Tube gripper, by the contiguous block pivot joint of bracing frame and described platform support, described tube gripper comprises: mount pad; Run through described mount pad and the screw rod that can longitudinally stretch; The upper end of described screw rod is connected with handwheel, and its bottom connects travelling frame, and the elongated slot that the both sides of a pair clamping limb and described travelling frame are offered is hinged, and described screw rod drives described travelling frame longitudinally move back and forth and drive described clamping limb opening and closing;
Detect dolly, be located at the below of described mobile platform assembly, comprise: car body; Be arranged at the Magnetic memory testing sensor of described car body bottom side; Two contact wheels, the both sides being arranged at described car body can rotated by the axletree running through described car body; Fork, its one end is articulated with on described car body, and its other end runs through the turning axle of horizontally set on described mobile platform, is provided with bulge loop at the middle part of described fork, between described bulge loop with the bottom surface of described turning axle, abutted spring.
2. as claimed in claim 1 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, described screw rod and sliding sleeve threaded engagement, the longitudinal sliding motion of described sliding sleeve energy through described mount pad, an adjusting bolt to be stretched in described mount pad by the sidewall of described mount pad and can be resisted against on the outer wall of described sliding sleeve; Be provided with flange collar in described sliding sleeve upper end, between described flange collar with the upper surface of described mount pad, abut Compress Spring.
3. as claimed in claim 1 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, clamping limb described in two is bending-like and is oppositely arranged, one end of clamping limb described in two is articulated with in the elongated slot of described travelling frame both sides respectively, its other end is provided with locating piece, and the bending part of described two clamping limbs is articulated with the two side ends of described mount pad respectively.
4. the damage of the bend pipe based on the Metal magnetic memory scanning detection apparatus as described in claim 1 or 2 or 3, it is characterized in that, flexible locating piece assembly is connected with at the subjacent of described travelling frame, described flexible locating piece assembly comprises: longitudinally sliding is arranged in the expansion link of described travelling frame bottom, described expansion link lower end connects locating piece, one caging bolt is stretched in described travelling frame by the sidewall of described travelling frame and also can be resisted against on described expansion link, has abutted Compress Spring in the bottom surface of described travelling frame with between the upper surface of described locating piece.
5. as claimed in claim 1 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, the bottom of described screw rod is provided with and convexly connects end, the upper end of described travelling frame is provided with and holds the described convex storage tank connecing end, have cover plate at the described convex end upper press cover that connects, the upper surface bolt of described cover plate and described travelling frame is fixed.
6. as claimed in claim 1 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, two guide rods are provided with in the both sides of described leading screw, described guide rod run through described mobile platform and and be provided with bearing between described mobile platform, the two ends of described guide rod connect with the contiguous block at described leading screw two ends respectively.
7. the damage of the bend pipe based on the Metal magnetic memory scanning detection apparatus as described in claim 1 or 2 or 3, is characterized in that, outside the contact wheel of described detection dolly, be connected with Bus-Speed Monitoring element.
8. as claimed in claim 1 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, bearing bridge is convexly equipped with outside the front and back side direction of described car body, described bearing bridge is provided with the rolling bearing that can rotate, the axis of described rolling bearing and the axis being parallel of described contact wheel.
9. the damage of the bend pipe based on the Metal magnetic memory scanning detection apparatus as described in claim 1 or 8, it is characterized in that, described car body is provided with four forks, the two ends, front side that wherein two forks are articulated with described car body form the first fork group, the rear side two ends that another two forks are articulated with described car body form the second fork group, the first turning axle through horizontally set on described mobile platform that described first fork group is slided, the second turning axle through horizontally set on described mobile platform that described second fork group is slided.
10. as claimed in claim 9 based on the bend pipe damage scanning detection apparatus of Metal magnetic memory, it is characterized in that, described first turning axle is provided with limit base, and described limit base is fixedly connected with described mobile platform, described first fork group slide through described limit base; Or be provided with limit base on described second turning axle, described limit base is fixedly connected with described mobile platform, described second fork group slide through described limit base.
CN201210313701.1A 2012-08-29 2012-08-29 Bend pipe damage scanning and detecting apparatus based on magnetic memory effect CN102830158B (en)

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CN108845032A (en) * 2018-05-28 2018-11-20 菏泽市产品检验检测研究院 A kind of boiler water-wall tube hydrogen damage ultrasonic detection method
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