CN2205556Y

CN2205556Y - Shaft neck and pipe crack detector

Info

Publication number: CN2205556Y
Application number: CN 93237392
Authority: CN
Inventors: 曾德文
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-03
Filing date: 1993-08-03
Publication date: 1995-08-16
Anticipated expiration: 2003-08-03

Abstract

A trolley which can move, can rise and can fall is provided with three pairs of U-shaped magnetic yoke probes and a longitudinal and radial movement device. The position of each magnetic yoke probe can be adjusted in three-dimensional space, which can be suitable for different needs of a workpiece, such as, thickness, length and height. The magnetic yoke probe is provided with flexible material, which can avoid the phenomenon that the workpiece is scratched. Three pairs of U-shaped magnetic yokes form a three-phase plane rotation magnetic field. The flaw of the workpiece can be integrally detected from various directions in a range of 90 DEG. The work efficiency and the reliability for flaw detection can be enhanced. Simultaneously the labor intensity of operators can be decreased. The utility model is an ideal late-model product for replacing a horseshoe magnetic yoke flaw detector with the prior art.

Description

Shaft neck and pipe crack detector

The utility model provides a kind of detecting instrument, especially relates to the nondestructive detecting instrument that is used to detect axle journal, pipeline-like workpiece safety.

The right axle journal of train wheel reaches the mechanically axle journal place of relevant parts, usually be considered as area of stress concentration, be easy to generate fatigue crack, workpiece is through quenching, after the grinding finishing, and drop into and use when keeping in repair again, generally to carry out carrying out flaw detection, in the prior art, all use the water chestnut magnetic head to detect, during detection magnetic head is detected a flaw respectively on every section mutually perpendicular two directions the flaw detection of this class part, so inspection speed is slower, because the water chestnut magnetic head directly contacts with axle journal when detecting, and will scratch axle journal inevitably, and the water chestnut magnetic head can only be to the axle journal local magnetized, cause the omission phenomenon easily, when using the flaw detection of water chestnut magnetic head simultaneously is with manpower defectoscope to be carried detecting, and therefore, labor strength is big, for this reason, the Ministry of Railways bans use of this kind water chestnut defectoscope.

The purpose of this utility model is to provide a kind of defectoscope, directly contacts the phenomenon of easy scuffing axle journal when changing the work of former water chestnut magnetic head with workpiece, and the problem that can only be easy to generate omission to the workpiece local magnetized, alleviates labor intensity of operating personnel.

The utility model is to realize like this, it comprises yoke, described yoke, on a yoke crossbeam, be provided with the U type yoke more than at least two pairs of longitudinal moving device, longitudinal adjustment apparatus makes between every pair of U-shaped yoke apart from regulating as required, the end face on U type yoke support arm top is provided with one deck soft material, U-shaped yoke support arm lower end is connected on the U-shaped yoke base with bolt, the two ends of U type yoke base are provided with fixed mount, the fixed mount both sides are provided with the radiai adjustment device, make two U type yoke support arms can make radiai adjustment, the energising back realizes that magnetic head and the automatic magnetic of measured workpiece close, the outage back automatically separately, the yoke crossbeam is installed in removable and has in the casing on plane on the dolly of jacking gear U type yoke together with several, this dolly finish when flaw detection with the U-shaped yoke near by the flaw detection workpiece, and satisfy workpiece upset when detecting, the needs of displacement.

Every pair of U-shaped yoke support arm top described in the utility model all curves inwardly, and the end face on U-shaped yoke support arm top is circular-arc, is provided with one deck soft material on arc surface.

U-shaped yoke described in the utility model is provided with the radiai adjustment device, it is characterized in that respectively being provided with a bearing support in the fixed mount both sides of U-shaped yoke base, be respectively equipped with adjusting bolt and two extension spring holes on bearing support top, the both sides on U-shaped yoke support arm top respectively are provided with two extension springs, extension spring hook one end colludes in set extension spring hole, U-shaped yoke support arm top, the other end colludes respectively in set extension spring hole, bearing support top, size according to measured workpiece, handle and regulate bolt, make U-shaped yoke two support arms near the measured workpiece surface, the energising back realizes that automatic magnetic closes, and the outage rear magnetic yoke separates automatically with measured workpiece.

Longitudinal moving device described in the utility model, it is characterized in that two ends respectively are provided with two bearings in the casing on the dolly upper frame, the two ends of two axles are separately fixed in the bearing hole, set hole, fixed mount bottom is assigned on this axle, push hard or draw fixed mount, fixed mount drives the U-shaped yoke, according to the needs of measured workpiece, adjusts several to the fore-and-aft distance between the U-shaped yoke.

Described in the utility model removable and the dolly of jacking gear arranged, it is characterized in that, underframe is connected by four pillar supportings, four pillars are divided into two groups all from the middle part drilling, the back prop mider hole that intersects is connected the two ends of a major axis, on the left side of two groups of pillars, following two-end-point is separately fixed at, on the underframe, on the right side of pillar, following two-end-point is connected to, on in the set guide groove of underframe, the two ends of lower guide rod, the top guide bar mid point is provided with nut, one end of screw rod is connected on the nut, the other end is by a upper frame and a perpendicular mid point of screw rod, and be connected with crank at its external part, on the underframe before and after both sides be provided with two pair rollers.

The utility model compared with prior art, owing to be provided with vertically, radially, three regulating devices up and down, make it can adapt to length, the axle journal that thickness is different or the needs of pipe detection, designed elevation and subsidence regulating device can also satisfy the needs of measured workpiece upset, make it very convenient, and alleviated labor intensity of operating personnel, on the energising circuit, utilize phase place poor naturally step-down in three-phase mains to export for safe voltage, supply with several magnetic probes, produce three phase rotating field magnetic quilt flaw detection workpiece, make by rotating magnetic field intensity unanimity on the flaw detection workpiece, and comprehensive scanning, fundamentally overcome the omission phenomenon, improved the reliability of work efficiency and flaw detection simultaneously effectively.The utility model is provided with soft material on its probe, make between magnetic probe and the axle journal and remain certain clearance, has overcome the yoke probe scratches phenomenon with directly being contacted by the workpiece of detecting a flaw generation.

Fig. 1 is the structural drawing of axle journal, pipeline inspection instrument;

Fig. 2 is axle journal, pipeline inspection instrument elevating mechanism structural drawing.

Below in conjunction with accompanying drawing most preferred embodiment of the present utility model is elaborated.

Fig. 1 shows this axle journal, the inner structure of pipeline inspection instrument, on plane on the dolly of lifting structure, be provided with casing 16, the medium position vertical direction of casing 16 is provided with yoke crossbeam 10, be provided with micromatic setting below the yoke crossbeam 10, be provided with two axles 13 in the both sides of yoke crossbeam 10, the two supports of axle 13 is in bearing 12 holes that are fixed on tank ends, yoke crossbeam 10 is provided with three pairs of U-shaped yokes, U-shaped yoke support arm 5 is provided with coil 7, U-shaped yoke support arm 5 tops all curve inwardly, and the curved shape of its end face, on arcwall face, be bonded with rubber soft material 6, U-shaped yoke support arm 5 lower ends are connected on the U-shaped yoke base 9 with bolt 8, the two ends of U-shaped yoke base 9 are provided with fixed mount 11, fixed mount 11 usefulness iron sheets are made, its top clamps the two ends of U-shaped yoke base 9, the hole at middle part, lower end is assigned on the axle 13, according to the shaft shoulder of measured workpiece distance with hand push or draw fixed mount 11, fixed mount 11 will drive the U-shaped yoke in length travel on 10 on the yoke crossbeam, realize vertically regulating, for reducing the gap between U-shaped yoke base 9 and yoke crossbeam 10 surface of contact, below yoke crossbeam 10, be provided with cushion block 14, below the cushion block 14 and be positioned at casing and be provided with bolt 15, tighten or looser a bolt 15, cushion block 14 drives the following middle part that plane on the yoke crossbeams 10 is adjacent to U-shaped yoke base 9.Fixed mount 11 both sides respectively are provided with the radiai adjustment device, promptly respectively be provided with a bearing support 2 in the both sides of the fixed mount 11 of U-shaped yoke base 9, be respectively equipped with adjusting bolt 1 and two extension spring holes on the top of bearing support 2, the both sides of two U-shaped yoke support arms 5 respectively are provided with two extension springs 3, two extension spring 3 hooks one ends collude in set extension spring hole, U-shaped yoke support arm 5 tops, the other end colludes respectively in set extension spring hole, bearing support 2 tops, size according to the measured workpiece diameter, handle and regulate bolt, make U-shaped yoke support arm 5 near the measured workpiece surface, after 7 energisings of yoke coil, U-shaped yoke support arm 5 realizes that with measured workpiece automatic magnetic closes, and outage back U-shaped yoke support arm 5 separates automatically with measured workpiece.

Fig. 2 shows this axle journal, the pipeline inspection liter, the structure of displacement mechanism is fallen, upper frame 17 is connected by 20 supportings of four pillars with underframe 21, four pillars 20 are divided into two groups all from the middle part drilling, the back prop 20 that intersects is connected the two ends of a major axis 19 by mider hole, the left side of two groups of pillars 20 two-end-point up and down is separately fixed at, underframe 17, on 21, on the right side of pillar 20, following two-end-point is connected to, underframe 17, on on 21 in the set guide groove 21,

lower guide rod

25,27 two ends, top guide bar 25 middle parts are provided with nut, one end of screw rod 23 is connected on the nut, the mid point that the other end hangs down mutually by upper frame 17 and screw rod, and at its external part connection crank, the both sides, front and back are provided with two pair rollers 22 on the underframe 21.Because the U-shaped yoke is installed on this little car, can shift suitable place onto according to need of work, shake crank 18, driving screw rod 23 rotates, screw rod 23 rotates makes nut 24 drive top guide bar 25, lower guide rod 27 drives pillar 20 and moves along guide groove 26, distance between upper frame 17, the underframe 21 is increased or dwindle, even the plane raises or reduces on the dolly upper frame 17.

Claims

1, a kind of axle journal, the pipeline inspection instrument, it comprises yoke, it is characterized in that on a yoke crossbeam (10), being provided with the U-shaped yoke more than at least two pairs of longitudinal moving device, longitudinal moving device makes between every pair of U-shaped yoke apart from regulating as required, the end face on U-shaped yoke support arm (5) top is provided with one deck soft material (6), U-shaped yoke support arm (5) lower end is connected on the U-shaped yoke base (9) with bolt (8), the two ends of U-shaped yoke base (9) are provided with fixed mount (11), fixed mount 11 both sides are provided with the radiai adjustment device, make U-shaped yoke support arm (5) can make radiai adjustment, the energising back realizes that magnetic head and the automatic magnetic of measured workpiece close, the outage back automatically separately, yoke crossbeam (10) is installed in removable and has in the casing on plane on the dolly of jacking gear the U-shaped yoke together with several, this dolly finish when flaw detection with the U-shaped yoke near by the flaw detection surface of the work, and satisfy workpiece upset when detecting, the needs of displacement.

2, axle journal according to claim 1, pipeline inspection instrument is characterized in that every pair of U-shaped yoke support arm (5) top all curves inwardly, and the end face on U-shaped yoke support arm (5) top is circular-arc, are provided with one deck soft material (6) on arc surface.

3, axle journal according to claim 1, the radiai adjustment device of pipeline inspection instrument, it is characterized in that: fixed mount (11) both sides at U-shaped yoke base (9) respectively are provided with a bearing support (2), be respectively equipped with adjusting bolt (1) and two extension spring holes on bearing support (2) top, the both sides on U-shaped yoke support arm (5) top respectively are provided with two extension springs (3), extension spring (3) hook one end colludes in set extension spring hole, U-shaped yoke support arm (5) top, the other end colludes respectively in set extension spring hole, bearing support (2) top, size according to detected diameter of work, handle and regulate bolt (1), make the surface of U-shaped yoke support arm (5) near measured workpiece, magnetic head is realized and is closed by the automatic magnetic of workpiece that the outage back automatically separately in the energising back.

4, the longitudinal moving device of axle journal according to claim 1, pipeline inspection instrument, it is characterized in that two ends respectively are provided with two bearings (12) in the casing (16) on dolly upper frame (17), the two ends of two axles (13) are separately fixed in bearing (12) hole, set hole, fixed mount (11) bottom is assigned on this axle, push hard or draw fixed mount (11), fixed mount (11) drives the U-shaped yoke, according to the needs of measured workpiece, adjusts several to the distance between the U-shaped yoke.

5, axle journal according to claim 1, pipeline inspection instrument the removable and dolly of jacking gear is arranged, it is characterized in that: upper frame (17), underframe (21) is connected by four pillars (20) supporting, four pillars (20) are divided into two groups all from the middle part drilling, back prop (20) mider hole that intersects is connected the two ends of a major axis (19), on the left side of two groups of pillars (20), following two-end-point is separately fixed at, underframe (17), (21) on, on the right side of pillar (20), following two-end-point is connected to, underframe (17), (21) on the set guide groove (26) on, lower guide rod (25), (27) two ends, top guide bar (25) mid point is provided with nut (24), one end of screw rod (23) is connected on the nut (24), the other end by upper frame (17) with a perpendicular mid point of screw rod (23), and be connected with crank (18) at its external part, both sides were provided with two pair rollers (22) before and after underframe (21) was gone up, whole dolly is bearing on four rollers (22), promotes the displacement that vehicle frame is realized dolly.