CN2479503Y - Steel pipe rotary alternating magnetic field demagnetizing device - Google Patents
Steel pipe rotary alternating magnetic field demagnetizing device Download PDFInfo
- Publication number
- CN2479503Y CN2479503Y CN 01245614 CN01245614U CN2479503Y CN 2479503 Y CN2479503 Y CN 2479503Y CN 01245614 CN01245614 CN 01245614 CN 01245614 U CN01245614 U CN 01245614U CN 2479503 Y CN2479503 Y CN 2479503Y
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- steel pipe
- yoke
- rotary body
- magnetic field
- mainframe
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Abstract
The utility model relates to a magnetic clearing treatment after the magnetism fault localization used for a ferromagnetism steel pipe, belonging to the steel pipe fault localization art. The steel pipe rotary alternating magnet field degaussing device comprises a main rack 3, a rotary motor 2 equipped on the rack, a rotary body 6 positioned inside the main rack and a magnet yoke 5 equipped on the rotary body, wherein the magnet yoke is wound with a magnetic coil, the coil is connected to a slip-ring 8, a metallic brush 7 equipped on the main rack is contacted with the slip-ring, the rotary motor drives the rotation of a rotary body, and one side of the main rack is equipped with a three-roll centering device 1. The demagnetization device can be suitable for steel pipes with external diameters of different sizes and wall thicknesses, and the rotary alternating magnet field inside the steel pipe is uniform, and the demagnetization effect is increased.
Description
The utility model relates to the clear magnetic treatment after a kind of magnetic flaw detection that is used for ferromagnetic steel pipe, belongs to the steel tube flaw detection field.
Steel pipe all will magnetize steel pipe when carrying out eddy current test and magnetic powder inspection, and these flaw detections belong to magnetic flaw detection.Often have remanent magnetism through the steel pipe after the magnetic flaw detection, make troubles for follow-up processing and use.The general AC and DC feed-through coil demagnetization method that adopts of existing steel pipe demagnetization, it is that the steel pipe that will have magnetic produces induced field when passing hot-wire coil, induced field is offset the remanent magnetism in the steel pipe, reaches the purpose of magnetic clearly.Because this method is to produce an axial alternating magnetic field in steel pipe, remanent magnetism in the steel pipe is adopted oppositely demagnetization, difficulty is accomplished suitable control in the magnetization current adjusting of control alternating magnetic field intensity, and steel pipe for all size external diameter and wall thickness, demagnetization effectiveness is also bad, through the residual more or less remanent magnetism of steel pipe after the demagnetization processing, cause forming magnetic pole and demonstrating magnetic at the two ends of steel pipe.Chinese patent application 00108100.4 discloses " a kind of demagnetizer for rotary magnetic field of ferromagnetic steel pipe ", this application is made up of degaussion coil and power supply, degaussion coil is made up of skeleton, winding, shell, three groups of windings are arranged and are wound on the skeleton, skeleton places shell, and the employing three-phase alternating current is a coil power supply.This device produces rotating magnetic field to steel pipe processings of demagnetizing by hot-wire coil, but to diameter of steel tube size and offset to the influence of rotating magnetic field less than consideration, may cause demagnetization effectiveness not good enough.
The purpose of this utility model is to provide a kind of steel pipe rotational alternating magnetic field demagnetizer.This device can be regulated yoke length according to the need diameter of steel tube that demagnetizes, reach demagnetization effectiveness preferably so that cooperate with the steel pipe of different-diameter, and three-roller centring device stabilized steel tube hub position is housed, makes that steel pipe each point induced field is more even, improve demagnetization effectiveness.
The utility model is achieved in that
A kind of steel pipe rotational alternating magnetic field demagnetizer, comprise mainframe, be contained in the electric rotating machine on the frame, place the rotary body in the mainframe, yoke is housed on the rotary body, is wound with magnetizing coil on the yoke, coil is received slip ring, the brush that is contained on the mainframe contacts with slip ring, and electric rotating machine driven rotary body rotates.
In the demagnetizer of above-mentioned steel pipe rotational alternating magnetic field, described yoke is a pair of or two pairs, yoke is contained on the guide bracket by screw, guide bracket is contained on the rotary body by screw, guide bracket body bottom centre has and debugs the joint bolt in the duct, regulates the bolt other end and is installed on the bearing that is positioned at a rotating body, at the rotary body back scale is housed, yoke one side is equipped with pointer, adjusts and regulates bolt scalable yoke extension elongation.
In the demagnetizer of above-mentioned steel pipe rotational alternating magnetic field, described mainframe one side is equipped with three-roller centring device, and this device is made up of cylinder, three rollers centering wheel, and cylinder promotes three rollers centering wheel steel pipe is placed between three centering wheels.
Principle of work of the present utility model is to adopt one group or two groups of yokes to be installed on the rotary body that is driven by electric rotating machine, produces rotational alternating magnetic field to the steel pipe processing of demagnetizing.When yoke when steel pipe rotates, the transversal section of steel pipe will produce induced field, this moment, steel shaft marched forward, corresponding steel pipe each point magnetic field intensity gradually reduces, and the remanent magnetism in the steel pipe is also reduced gradually, finishes the demagnetization to steel pipe remanence.Be wound with magnetizing coil on the yoke, the magnetization current scalable in the magnetizing coil, the length of yoke is scalable also, and the different yokes of interchangeable, so this demagnetizer is applicable to the steel pipe of different size external diameter and wall thickness.In order to make the rotational alternating magnetic field in the steel pipe even, improve demagnetization effectiveness, in demagnetizer mainframe one side three-roller centring device is housed, make the air gap of steel pipe and yoke reach the optimum position.
Fig. 1 is the utility model steel pipe rotational alternating magnetic field demagnetizer structural representation, and Fig. 2 is the front elevation of demagnetizer, and Fig. 3 is the three-roller centring device structural representation, and Fig. 4 is a yoke adjustment structure synoptic diagram.
Provide embodiment of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 2, Fig. 4, demagnetizer is contactlessly steel pipe 11 to be magnetized by pair of magnetic yoke 5.Demagnetizer comprises mainframe 3, be contained in the electric rotating machine 2 on the frame 3, place the rotary body 6 in the mainframe 3, yoke 5 is housed on the rotary body 6, rotary body 6 is driven by electric rotating machine 2 and rotates, and is wound with magnetizing coil on the yoke 5, and yoke 5 also can adopt permanent magnet, magnetizing coil is received slip ring 8, is contained in brush 7 on the mainframe 3 and contacts with slip ring 8 power supply is imported in the magnetizing coil.Yoke 5 is contained on the guide bracket 15 by screw, guide bracket 15 is contained on the rotary body 6 by screw 16, guide bracket 15 body bottom centre have and debug joint bolt 18 in the duct, regulating bolt 18 other ends is installed on the bearing 17 that is positioned at rotary body 6, the dust cover 14 that prevents that dust from falling is housed on the guide bracket 15, at rotary body 6 backs scale 12 is housed, yoke 5 one sides are equipped with pointer 13, adjust and regulate bolt 8 scalable yokes, 5 extension elongations (pair of magnetic yoke 5 spacings), form best demagnetization effectiveness so that yoke 5 cooperates with the steel pipe 11 of different-diameter.
Referring to Fig. 3, in demagnetizer mainframe 3 one sides three-roller centring device 1 is housed, this device 1 is made up of cylinder 9, three rollers centering wheel 10, and cylinder 9 promotes three rollers centering wheel 10 steel pipe 11 is placed between three centering wheels 10.Three-roller centring device 1 is contained on the steel plate to be formed Yishanmen and is contained in mainframe 3 one sides, and steel pipe 11 passes demagnetizer mainframe 3 processing of demagnetizing through three-roller centring devices 1.
The demagnetizer use is preceding installs yoke 5 according to steel pipe 11 diameters earlier, and opens mainframe side door 4 and regulate yokes 5 spacings, after adjustment finishes demagnetizer is moved into steel pipe 11 and checks the line and the processing of demagnetizing.
The utility model has carried out the demagnetization after the EDDY CURRENT to tens0000 tons of steel pipes and has handled through using at Baosteel steel pipe branch office oil well pipe flaw detection line the sixth of the twelve Earthly Branches, and the end finds have steel pipe remanence to exceed standard, and has obtained satisfied effect.
Claims (3)
1. steel pipe rotational alternating magnetic field demagnetizer, it is characterized in that this demagnetizer comprises mainframe, be contained in the electric rotating machine on the frame, place the rotary body in the mainframe, yoke is housed on the rotary body, is wound with magnetizing coil on the yoke, coil is received slip ring, the brush that is contained on the mainframe contacts with slip ring, and electric rotating machine driven rotary body rotates.
2. steel pipe rotational alternating according to claim 1 magnetic field demagnetizer, it is characterized in that yoke is a pair of or two pairs, yoke is contained on the guide bracket by screw, guide bracket is contained on the rotary body by screw, guide bracket body bottom centre has and debugs the joint bolt in the duct, regulates the bolt other end and is installed on the bearing that is positioned at a rotating body, at the rotary body back scale is housed, yoke one side is equipped with pointer, adjusts and regulates bolt scalable yoke extension elongation.
3. steel pipe rotational alternating according to claim 1 and 2 magnetic field demagnetizer is characterized in that in mainframe one side three-roller centring device being housed, and this device is taken turns and formed by cylinder, the centering of three rollers, and cylinder promotes three rollers centering wheel and places three centering wheels middle steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245614 CN2479503Y (en) | 2001-05-29 | 2001-05-29 | Steel pipe rotary alternating magnetic field demagnetizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245614 CN2479503Y (en) | 2001-05-29 | 2001-05-29 | Steel pipe rotary alternating magnetic field demagnetizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2479503Y true CN2479503Y (en) | 2002-02-27 |
Family
ID=33656840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01245614 Expired - Fee Related CN2479503Y (en) | 2001-05-29 | 2001-05-29 | Steel pipe rotary alternating magnetic field demagnetizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2479503Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091646A (en) * | 2012-10-31 | 2013-05-08 | 吴江市宏达探伤器材有限公司 | Rotating magnetic field probe |
| CN111403139A (en) * | 2020-04-02 | 2020-07-10 | 武汉船用机械有限责任公司 | Ring cylinder type steel part demagnetizer |
-
2001
- 2001-05-29 CN CN 01245614 patent/CN2479503Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091646A (en) * | 2012-10-31 | 2013-05-08 | 吴江市宏达探伤器材有限公司 | Rotating magnetic field probe |
| CN103091646B (en) * | 2012-10-31 | 2015-09-30 | 吴江市宏达探伤器材有限公司 | Rotating magnetic field is popped one's head in |
| CN111403139A (en) * | 2020-04-02 | 2020-07-10 | 武汉船用机械有限责任公司 | Ring cylinder type steel part demagnetizer |
| CN111403139B (en) * | 2020-04-02 | 2022-06-10 | 武汉船用机械有限责任公司 | Ring cylinder type steel part demagnetizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020227 |