阅读说明：本技术 一种孔内壁周向缺陷的磁粉检测设备 (magnetic particle testing equipment for circumferential defects of inner wall of hole ) 是由 查达建 陈婷玉 段焕俊 于 2019-09-17 设计创作，主要内容包括：本发明公开了一种孔内壁周向缺陷的磁粉检测设备,包括管体和固定块,所述管体内设置有固定管,且固定管内部安装有内管,同时内管与固定管之间通过喷嘴进行固定,内管的右侧包裹有安装块,且安装块右端内部开设有连接腔,同时连接腔内部固定连接有固定轴承,插管内部安装有工作管,且工作管德右端固定连接有限位块,壳体内部开设有连通管,且连通管的右端与泵体的出口相连通,同时泵体的进口与磁悬液管相连通,并且泵体通过机座固定在壳体内部。该孔内壁周向缺陷的磁粉检测设备,具有励磁线圈中会产生磁场,对磁粉进行磁化,磁化完成后磁粉会在缺陷处聚集,形成磁粉图案,可直观反映孔内壁周向缺陷的特点。(The invention discloses a magnetic powder detection device for circumferential defects of the inner wall of a hole, which comprises a tube body and a fixed block, wherein a fixed tube is arranged in the tube body, an inner tube is arranged in the fixed tube, the inner tube and the fixed tube are fixed through a nozzle, the right side of the inner tube is wrapped with an installation block, a connection cavity is formed in the right end of the installation block, a fixed bearing is fixedly connected in the connection cavity, a working tube is arranged in an insertion tube, a limit block is fixedly connected at the right end of the working tube, a communicating tube is arranged in a shell, the right end of the communicating tube is communicated with an outlet of a pump body, an inlet of the pump body is communicated with a magnetic suspension tube, and. The magnetic particle detection equipment for the circumferential defects of the inner wall of the hole has the characteristics that a magnetic field can be generated in the excitation coil to magnetize magnetic particles, the magnetic particles can be gathered at the defects after the magnetization is finished, a magnetic particle pattern is formed, and the circumferential defects of the inner wall of the hole can be reflected visually.)

1. The utility model provides a magnetic particle testing equipment of downthehole wall circumference defect, includes body (1) and fixed block (18), its characterized in that: the improved pipeline is characterized in that a fixed pipe (3) is arranged in the pipe body (1), an inner pipe (5) is arranged inside the fixed pipe (3), meanwhile, the inner pipe (5) and the fixed pipe (3) are fixed through a nozzle (4), an installation block (6) wraps the right side of the inner pipe (5), a connection cavity (26) is formed inside the right end of the installation block (6), a fixed bearing (8) is fixedly connected inside the connection cavity (26), a working pipe (7) is arranged inside the insertion pipe (9), a limiting block (11) is fixedly connected to the de right end of the working pipe (7), a communication pipe (12) is formed inside the shell (16), the right end of the communication pipe (12) is communicated with an outlet of the pump body (13), meanwhile, an inlet of the pump body (13) is communicated with a magnetic suspension pipe (14), and the pump body (13) is fixed inside the; a handle (17) is arranged on the shell (16);

fixed block (18) and casing (16) fixed connection, and fixed block (18) are inside to be seted up mounting groove (19), and grafting piece (20) internally mounted has the body of rod (22), and the inside right side of grafting piece (20) installs panel (21), and the winding has excitation coil (23) on the left of the body of rod (22) simultaneously.

2. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: fixed pipe (3) set up in inside pipe hole inner wall (2) of body (1), and install eight groups of nozzles (4) on fixed pipe (3), and eight groups of nozzles (4) are evenly set up along the circumference position of fixed pipe (3) simultaneously.

3. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the nozzle (4) is communicated with the working pipe (7) and the communicating pipe (12) through the inner pipe (5), and the nozzle (4) is of a rotary structure.

4. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the inner part of the right end of the mounting block (6) is fixed with the outer ring of the fixed bearing (8), and the working pipe (7) penetrates through the inner ring of the fixed bearing (8) and is arranged inside the inner pipe (5).

5. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the working pipe (7) is inserted in the insertion pipe (9) through the sealing ring (10), the working pipe (7) is of a telescopic structure, and meanwhile the working pipe (7) and the sealing ring (10) are of concentric circle structures.

6. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the pump body (13) is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe (14), and the pump body (13) is electrically connected with the switch button (15).

7. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the circumference position of grafting piece (20) evenly sets up four groups locating piece (25), and the inside circumference position of mounting groove (19) evenly sets up four groups constant head tank (24), and grafting piece (20) are pegged graft in constant head tank (24) through locating piece (25) simultaneously.

8. The magnetic particle testing equipment for circumferential defects of inner walls of holes according to claim 1, characterized in that: the excitation coil (23) is electrically connected with the battery panel (21), the rod body (22) is inserted in the insertion block (20), and the rod body (22) is of a telescopic structure.

Technical Field

The invention relates to the technical field of nondestructive testing of pipelines, in particular to a magnetic powder testing device for circumferential defects of an inner wall of a hole.

Background

The magnetic powder detection technology is used for identifying defects such as cracks, hairlines, air holes, inclusions and folds on the surface and near surface of a ferromagnetic workpiece under the condition of not damaging the detected workpiece, has high detection sensitivity, can directly display the shape and position information of the defects, and has visual detection result and low detection cost; at present, the ultrasonic detection technology is industrially used for detecting the condition of the inner wall of a small pipeline, the ultrasonic penetration capacity is strong, the detection rate and the precision for detecting the crack defects with the wall thickness of more than 4mm and the thickness of more than 0.5mm in a detected piece are high, but the detection rate for the micron-sized crack defects on the surface of the pipe wall is low.

In order to overcome the defects existing in the current market, the technology for improving the magnetic powder detection device is urgently needed.

Disclosure of Invention

The invention solves the technical problem of overcoming the defects that the ultrasonic detection technology is used for detecting the inner wall of a small pipeline in the prior art, the ultrasonic penetration capacity is strong, the detection rate of crack defects larger than 0.5mm in a detection piece with the wall thickness larger than 4mm is high, the precision is high, but the detection rate of micron-sized crack defects on the surface of the pipe wall is low, and provides the magnetic powder detection equipment for the circumferential defects of the inner wall of a hole. The installation block, the magnet exciting coil and the fixed bearing have the advantages that a magnetic field can be generated in the magnet exciting coil, magnetic powder is magnetized, the magnetic powder can be gathered at a defect position after the magnetization is finished, a magnetic powder pattern is formed, and circumferential defects of the inner wall of the hole can be reflected visually.

in order to achieve the purpose, the invention provides the following technical scheme: a magnetic particle testing device for circumferential defects of the inner wall of a hole comprises a tube body and a fixed block, wherein a fixed tube is arranged in the tube body, an inner tube is arranged in the fixed tube, the inner tube and the fixed tube are fixed through a nozzle, an installation block wraps the right side of the inner tube, a connection cavity is formed in the right end of the installation block, a fixed bearing is fixedly connected in the connection cavity, a working tube is arranged in an insertion tube, a limit block is fixedly connected to the right end of the working tube, a communicating tube is formed in the shell, the right end of the communicating tube is communicated with an outlet of a pump body, an inlet of the pump body is communicated with a magnetic suspension tube, and the pump body; the shell is provided with a handle;

Fixed block and casing fixed connection, and the inside mounting groove of having seted up of fixed block, the internal portion of pegging graft installs the body of rod, and the internal portion right side of pegging graft installs the panel, and the winding of body of rod left side has excitation coil simultaneously.

Preferably, the fixed pipe is arranged in the inner wall of the pipe hole in the pipe body, eight groups of nozzles are mounted on the fixed pipe, and the eight groups of nozzles are uniformly arranged along the circumferential position of the fixed pipe.

Preferably, the nozzle is communicated with the communicating pipe through the inner pipe and the working pipe, and the nozzle is of a rotating structure.

Preferably, the inner part of the right end of the mounting block is fixed with an outer ring of the fixed bearing, and the working pipe passes through an inner ring of the fixed bearing and is arranged inside the inner pipe.

Preferably, the working pipe is inserted in the insertion pipe through the sealing ring, the working pipe is of a telescopic structure, and the working pipe and the sealing ring are of a concentric structure.

Preferably, the pump body is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe, and the pump body is electrically connected with the switch button.

Preferably, the circumference position of the plug block evenly sets up four groups of locating pieces, and the inside circumference position of mounting groove evenly sets up four groups of constant head tanks, and the plug block passes through the locating piece simultaneously and pegs graft in the constant head tank.

preferably, the excitation coil is electrically connected with the battery panel, the rod body is inserted into the insertion block, and the rod body is of a telescopic structure; after the magnetic suspension is sprayed on the inner wall of the pipe hole in the circumferential direction, the battery board provides direct current for the magnet exciting coil, a magnetic field can be generated in the magnet exciting coil at the moment, magnetic powder is magnetized, the magnetic powder can be gathered at the defect position after the magnetization is finished, a magnetic powder pattern is formed, and the circumferential defect of the inner wall of the pipe hole can be visually reflected.

Compared with the prior art, the invention has the beneficial effects that:

1. The battery plate provides direct current for the excitation coil, a magnetic field can be generated in the excitation coil at the moment to magnetize magnetic powder, and the magnetic powder can be gathered at the defect after the magnetization is finished to form a magnetic powder pattern which can visually reflect the circumferential defects of the inner wall of the hole;

2. the magnet exciting coil is a precise instrument, and when the magnet exciting coil is idle, the inserting block can be taken out and independently stored, so that the service life of the magnet exciting coil is ensured;

3. The nozzle evenly sets up to eight groups along the circumference position of fixed pipe, guarantees that the nozzle can be with even the spraying of magnetic suspension on the circumference position of tube hole inner wall.

drawings

FIG. 1 is a schematic front view of the structure of the present invention;

3 FIG. 3 2 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 of 3 a 3 structure 3 A 3- 3 A 3 of 3 the 3 present 3 invention 3; 3

FIG. 3 is a schematic view of a structural joint chamber of the present invention;

FIG. 4 is a schematic cross-sectional view of a structural mounting block of the present invention;

FIG. 5 is a schematic view of a positioning block of the present invention.

reference numbers in the figures: 1. a pipe body; 2. the inner wall of the pipe hole; 3. a fixed tube; 4. a nozzle; 5. an inner tube; 6. mounting blocks; 7. a working pipe; 8. fixing the bearing; 9. inserting a tube; 10. a seal ring; 11. a limiting block; 12. a communicating pipe; 13. a pump body; 14. a magnetic suspension tube; 15. a switch button; 16. a housing; 17. a handle; 18. a fixed block; 19. mounting grooves; 20. an insertion block; 21. a battery plate; 22. a rod body; 23. a field coil; 24. positioning a groove; 25. positioning blocks; 26. a connecting cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a magnetic powder detection device for circumferential defects of the inner wall of a hole comprises a tube body 1 and a fixed block 18, wherein a fixed tube 3 is arranged in the tube body 1, an inner tube 5 is arranged inside the fixed tube 3, meanwhile, the inner tube 5 and the fixed tube 3 are fixed through nozzles 4, the fixed tube 3 is arranged in the inner wall 2 of the hole in the tube body 1, eight groups of nozzles 4 are arranged on the fixed tube 3, and meanwhile, the eight groups of nozzles 4 are uniformly arranged along the circumferential position of the fixed tube 3; the nozzle 4 is communicated with the communicating pipe 12 through the inner pipe 5 and the working pipe 7, and the nozzle 4 is of a rotary structure; the right side of the inner pipe 5 is wrapped with the mounting block 6, a connecting cavity 26 is formed in the right end of the mounting block 6, a fixed bearing 8 is fixedly connected in the connecting cavity 26, the inner portion of the right end of the mounting block 6 is fixed with the outer ring of the fixed bearing 8, and the working pipe 7 penetrates through the inner ring of the fixed bearing 8 and is arranged in the inner pipe 5; the working pipe 7 is arranged inside the insertion pipe 9, the right end of the working pipe 7 is fixedly connected with a limiting block 11, the working pipe 7 is inserted inside the insertion pipe 9 through a sealing ring 10, the working pipe 7 is of a telescopic structure, and meanwhile the working pipe 7 and the sealing ring 10 are of concentric circle structures; a communicating pipe 12 is arranged in the shell 16, the right end of the communicating pipe 12 is communicated with the outlet of the pump body 13, the inlet of the pump body 13 is communicated with the magnetic suspension pipe 14, and the pump body 13 is fixed in the shell 16 through a base; a handle 17 is arranged on the shell 16; the pump body 13 is communicated with an external magnetic suspension liquid tank through a magnetic suspension liquid pipe 14, and the pump body 13 is electrically connected with a switch button 15; the fixed block 18 is fixedly connected with the shell 16, an installation groove 19 is formed in the fixed block 18, a rod body 22 is installed in the insertion block 20, a battery panel 21 is installed on the right side in the insertion block 20, and meanwhile the excitation coil 23 is wound on the left side of the rod body 22; four groups of positioning blocks 25 are uniformly arranged at the circumferential position of the insertion block 20, four groups of positioning grooves 24 are uniformly arranged at the circumferential position in the installation groove 19, and the insertion block 20 is inserted in the positioning grooves 24 through the positioning blocks 25; the excitation coil 23 is electrically connected with the battery panel 21, the rod body 22 is inserted in the insertion block 20, and the rod body 22 is of a telescopic structure;

The rod body 22 is inserted into the insertion block 20, the insertion block 20 is inserted into the installation groove 19 through the positioning block 25, the magnet exciting coil 23 is a precision instrument, and when the device is idle, the insertion block 20 can be taken out and independently stored, so that the service life of the magnet exciting coil 23 is ensured;

After the magnetic suspension is sprayed in the inner wall 2 of the pipe hole in the circumferential direction, the battery plate 21 supplies direct current to the exciting coil 23, a magnetic field is generated in the exciting coil 23 at the moment, magnetic powder is magnetized, the magnetic powder is gathered at the defect position after the magnetization is finished, a magnetic powder pattern is formed, and the circumferential defect of the inner wall of the hole can be visually reflected; the pump body 13 is 7V12C85R 37; in the above embodiments, the pump body 13, the switch button 15 and the excitation coil 23 are all common elements used by those skilled in the art, and are well-known in the art, and in the above embodiments, only the pump body 13, the switch button 15 and the excitation coil 23 are used, and the functions and structures thereof are not changed, and the connection relationship of the control circuit thereof is not changed in the present embodiment.

when the magnetic powder detection equipment for circumferential defects of the inner wall of the hole is used, the handle 17 is held by hand, the fixed pipe 3 extends into the inner wall 2 of the hole, the pump body 13 sprays outside magnetic suspension from the nozzle 4 through the communicating pipe 12, the working pipe 7 and the inner pipe 5 by starting the switch button 15 of the pump body 13, the mounting block 6 is rotated at the moment, the mounting block 6 drives the nozzle 4 to rotate under the action of the fixed bearing 8, the magnetic suspension is uniformly sprayed on the circumferential position of the inner wall 2 of the hole, the working pipe 7 is telescopically inserted into the insertion pipe 9, the length of the fixed pipe 3 can be adjusted according to the length of the pipe body 1, after the magnetic suspension is sprayed on the inner wall 2 of the hole, the fixed pipe 3 is drawn out, the rod body 22 is inserted into the inner wall 2 of the hole, the excitation coil 23 generates a magnetic field to magnetize magnetic powder, the magnetic powder can be gathered at the defect after the magnetization is finished, shooting the magnetized defect part through a camera and light source equipment, which is the prior mature technology and is not described again; the whole working process of the magnetic particle testing equipment for the circumferential defects of the inner wall of the hole is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.