CN210346952U

CN210346952U - Sliding probe

Info

Publication number: CN210346952U
Application number: CN201921131124.8U
Authority: CN
Inventors: 张建华; 程亚宇; 赵贺祥; 孙永忠; 李建忠
Original assignee: Siter Intelligent Testing Suzhou Co ltd
Current assignee: Siter Intelligent Testing Suzhou Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-17
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a sliding probe, wherein the multi-stage probe is an iron part and comprises a fixed block, and an excitation upright post and an induction upright post which are positioned on the fixed block; the fixed block is cylindrical structure, the excitation stand is located fixed block central point puts the department, response stand quantity is a plurality of and follows fixed block circumference interval distribution, response stand bottom through the subassembly that slides with the fixed block is connected, the response stand can be followed the fixed block radially removes, the excitation stand with all be equipped with the coil on the response stand. The utility model discloses a subassembly that slides is connected fixed block and response stand, makes the response stand radially remove along the fixed block, and the removal of a plurality of response stands can change the detection range of probe to realized detecting the not unidimensional article, need not to change different probes and detect the not unidimensional measured object, improved detection efficiency greatly.

Description

Sliding probe

Technical Field

The utility model belongs to the technical field of magnetism stress detection, especially, relate to a slippage type probe.

Background

In the fields of machinery manufacturing, petrochemical industry, aerospace, building engineering, railways, water conservancy and power and the like, the stress state and microstructure of a material are main factors influencing the service life of the material. Nondestructive testing of the residual stress and certain mechanical properties of a structure is of great economic and practical importance. The magnetic measurement method is to evaluate the internal stress according to the change of magnetism of the ferromagnetic material after being stressed.

Traditional probe is in the use, generally need change according to the size of testee, and different sizes's testee need adopt the probe of different specifications, so the magnetism surveys the stress appearance before using, often need change the probe, needs to spend plenty of time in the change process, leads to detection efficiency low.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a sliding probe, need not to change the probe and also can detect it to not unidimensional article, need not to spend the change time, improves detection efficiency.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a sliding type probe is characterized in that the multi-stage probe is an iron piece and comprises a fixed block, and an excitation upright column and an induction upright column which are positioned on the fixed block; the fixed block is cylindrical structure, the excitation stand is located fixed block central point puts the department, response stand quantity is a plurality of and follows fixed block circumference interval distribution, response stand bottom through the subassembly that slides with the fixed block is connected, the response stand can be followed the fixed block radially removes, the excitation stand with all be equipped with the coil on the response stand.

In a preferred embodiment of the present invention, the fixed block is provided with a sliding groove in a radial direction, and the sliding component includes a sliding block and a circular protrusion located on two sides of the sliding block.

In a preferred embodiment of the present invention, the inner sides of the sliding groove are both provided with a flexible board, the flexible board is provided with a circular groove, and the circular protrusion cooperates with the circular groove.

In a preferred embodiment of the present invention, the number of the sliding grooves is equal to the number of the sensing posts, and the number of the circular grooves is a plurality of and is distributed along the length direction of the flexible board at equal intervals.

In a preferred embodiment of the present invention, the coil is wound around the excitation post and the induction post surface respectively.

In a preferred embodiment of the present invention, the excitation post position is an excitation pole, and the induction post position is an induction pole.

The utility model provides a defect that exists among the background art, the utility model discloses possess following beneficial effect:

the utility model discloses a subassembly that slides is connected fixed block and response stand, makes the response stand radially remove along the fixed block, and the removal of a plurality of response stands can change the detection range of probe to realized detecting the not unidimensional article, need not to change different probes and detect the not unidimensional measured object, improved detection efficiency greatly.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic overall structure diagram of the preferred embodiment of the present invention;

fig. 2 is a partial structural schematic diagram of the preferred embodiment of the present invention;

in the figure: 1. a fixed block; 11. a chute; 2. exciting the upright post; 3. sensing the upright post; 4. a slipping component; 41. a slider; 42. a circular protrusion; 5. a flexible board; 51. a circular groove; 6. and a coil.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and illustrate, by way of illustration only, the basic structure of the invention, and which therefore show only the constituents relevant to the invention.

As shown in fig. 1 and 2, a sliding probe, a multi-stage probe is an iron part, and the multi-stage probe includes a fixed block 1, and an excitation column 2 and an induction column 3 located on the fixed block 1; the fixed block 1 is a cylindrical structure body, the excitation upright post 2 is positioned at the central position of the fixed block 1, the induction upright posts 3 are distributed at intervals along the circumferential direction of the fixed block 1, the bottom of the induction upright post 3 is connected with the fixed block 1 through the sliding component 4, the induction upright post 3 can move along the radial direction of the fixed block 1, and the excitation upright post 2 and the induction upright post 3 are both provided with coils 6. in the use process, the position of the induction upright post 3 is firstly adjusted according to the size of a measured object, the induction upright post 3 is adjusted to slide along the length direction of the sliding chute 11 through the sliding block 41, in the sliding process, the circular bulges 42 positioned at both sides of the sliding block 41 are matched with the circular grooves 51 at both sides inside the sliding chute 11, when the sliding block 41 moves, the circular bulges 42 can sequentially enter the circular grooves 51 to realize the positioning of the induction upright post 3, because the circular grooves 51 are positioned, and circular protrusion 42 adopts the stereoplasm material piece, so sliding block 41 is at the motion in-process, and flexible sheet 5 can take place deformation, makes circular protrusion 42's removal can not receive the influence to adjust a plurality of response stands 3 to suitable position.

After 3 position control of response stand are accomplished, coil 6 on 2 is switched on to the stand that excites, because 2 position departments of stand that excites are the excitation pole, so the electric current passes through behind coil 6, arouses and produces the magnetic field, and 3 position departments of response stand are the induction pole, because the probe is the ironware, so behind 2 position departments of stand that excites produce the magnetic field, 3 position departments of response stand produce the magnetic field synchronously, the circular telegram back, the magnetic survey stress appearance can draw current signal, wherein the current value is as follows with the corresponding relation of stress: (I)₂-I₁)＝α(σ₁-σ₂)………………………………………(1)

σ₁-maximum principal stress, Mpa;

σ₂-minimum principal stress, Mpa;

I₁-the maximum principal stress direction current output value, mA;

I₂-minimum principal stress direction current output value, mA;

α -sensitivity factor, mA/Mpa (determined by calibration tests, the instrument gives a reference value for a general structural steel.)

When the main stress direction is unknown, the main stress direction angle and the main stress difference can be determined by using a formula

θ＝f₁(I₀,I₄₅,I₉₀)………………………………………(2)

(σ₁-σ₂)＝f₂(I₀,I₄₅,I₉₀)…………………………………(3)

In the formula, theta is the included angle between the direction of the maximum main stress and the X axis;

I₀、I₄₅、I₉₀-measuring current values (mA) in three directions of 0 °, 45 ° and 90 °.

Knowing the principal stress difference and principal direction angle of each point, the stress component of any point P can be calculated by using the shear stress difference method.

Further, the fixed block 1 is provided with a sliding groove 11 in the radial direction, and the sliding assembly 4 comprises a sliding block 41 and circular protrusions 42 located on two sides of the sliding block 41.

Specifically, the flexible plates 5 are arranged on two sides of the inside of the sliding chute 11, the flexible plates 5 are provided with circular grooves 51, and the circular protrusions 42 are matched with the circular grooves 51.

Specifically, the number of the sliding grooves 11 is the same as that of the induction columns 3, and the number of the circular grooves 51 is a plurality of grooves distributed at equal intervals along the length direction of the flexible board 5.

Further, the coil 6 is respectively wound on the surfaces of the excitation upright post 2 and the induction upright post 3.

Specifically, the excitation column 2 is an excitation pole, and the induction column 3 is an induction pole.

To sum up, the utility model discloses a subassembly 4 that slides is connected fixed block 1 and response stand 3, makes response stand 3 can radially move along fixed block 1, and the removal of a plurality of response stands 3 can change the detection range of probe to realized detecting the not unidimensional article, need not to change different probes and detect the not unidimensional measured object, improved detection efficiency greatly.

In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A sliding type probe is characterized in that the sliding type probe is an iron piece and comprises a fixed block, and an excitation upright post and an induction upright post which are positioned on the fixed block; the fixed block is cylindrical structure, the excitation stand is located fixed block central point puts the department, response stand quantity is a plurality of and follows fixed block circumference interval distribution, response stand bottom through the subassembly that slides with the fixed block is connected, the response stand can be followed the fixed block radially removes, the excitation stand with all be equipped with the coil on the response stand.

2. Sliding probe according to claim 1, wherein the fixed block is provided with sliding grooves in the radial direction, and the sliding assembly comprises a sliding block and circular protrusions located on both sides of the sliding block.

3. Sliding probe according to claim 2, wherein flexible plates are provided on both sides of the inside of the chute, and circular grooves are provided on the flexible plates, and the circular protrusions are engaged with the circular grooves.

4. A sliding probe according to claim 3 wherein said number of sliding grooves is the same as said number of sensing studs, and said number of circular grooves is a plurality of grooves equally spaced along the length of said flexible plate.

5. Sliding probe according to claim 1, wherein the coils are wound around the surface of the excitation and induction posts, respectively.

6. A sliding probe according to claim 1 wherein said excitation post locations are excitation poles and said induction post locations are induction poles.