CN206891619U - Magnetic stress sensor and its shielding shell mechanism - Google Patents
Magnetic stress sensor and its shielding shell mechanism Download PDFInfo
- Publication number
- CN206891619U CN206891619U CN201720721315.4U CN201720721315U CN206891619U CN 206891619 U CN206891619 U CN 206891619U CN 201720721315 U CN201720721315 U CN 201720721315U CN 206891619 U CN206891619 U CN 206891619U
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- plug
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- sleeve
- shielding shell
- stress sensor
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Abstract
The utility model discloses a kind of shielding shell of magnetic stress sensor, it is made up of electrical pure iron, including sleeve and the plug for being symmetrically mounted on sleeve both ends, plug is at least embedded in sleeve inner in its one end, interconnected the first cavity and the second cavity are provided with inside plug, first cavity, the center line of second cavity and plug overlaps, first cavity and the second cavity respectively with plug ft connection, the diameter of first cavity is more than the diameter of the second cavity, make to form limited step on plug inwall, the wherein depth of the first cavity and plug length ratio is between 0.1 0.9, the ratio between the radius of first cavity and the external diameter of plug are between 0.25 2.5.The magnetic stress sensor with above-mentioned shielding shell is also disclosed in the utility model.The utility model can effectively shield extraneous strong electromagnetic, reduce sensor measuring coil leakage magnetic field, ensure measurement accuracy.
Description
Technical field
It the utility model is related to magnetic stress testing equipment field, more particularly to a kind of detect what is be twisted by steel wire strand
The internal stress measurement apparatus and its shell mechanism of the ferromagnetic material such as cable wire or reinforcing bar, rod iron.
Background technology
The magnetic stress sensor that magnetoelasticity principle based on ferromagnetic material makes, formed using measured steel component
Sensor, when the stress that it bears changes, the magnetic conductivity of the steel component changes simultaneously, by measuring the magnetic conductance
The variable quantity of rate, determine the stress intensity in steel component.
During magnetic stress sensor carries out accurately monitoring and follow-up operation maintenance for the stretching process of steel component
Long term monitoring, it is a kind of measurement apparatus for having high-precision requirement, but it is affected by the ambient in practical engineering application, one
Aspect is the electromagnetic interference caused by lead between tested component, spacing electromagnetic radiation and sensor and instrument, on the other hand,
The ferromagnetic environment in scene is easy to the leakage magnetic field for causing sensor measuring coil, reduces measurement accuracy.
Utility model content
In order to solve the above problems, the purpose of this utility model, which is to provide one kind, can effectively shield extraneous strong electromagnetic and do
Disturb, reduce the magnetic stress sensor and its shielding shell mechanism of sensor measuring coil leakage magnetic field.
In order to realize above-mentioned purpose, the utility model employs following technical scheme：
The shielding shell of magnetic stress sensor, is made up of electrical pure iron, including sleeve and is symmetrically mounted on sleeve both ends
Plug, plug are at least embedded in sleeve inner in its one end, interconnected the first cavity and the second cavity, institute are provided with inside plug
The center line for stating the first cavity, the second cavity and plug overlaps, the first cavity and the second cavity respectively with plug ft connection, first
The diameter of cavity is more than the diameter of the second cavity, makes to form limited step on plug inwall, wherein the depth of the first cavity is with blocking up
Head length ratio is between 0.1-0.9, and the ratio between the radius of the first cavity and the external diameter of plug are between 0.25-2.5.Said structure
Shielding shell, the electromagnetic interference of surrounding environment is difficult to be penetrated into sensor internal, while reduces the magnetic of sensor measuring coil
Let out outside the venue, ensure the measurement accuracy of magnetic stress sensor.
Preferably, plug is cylindrical, the external diameter of plug is matched with the internal diameter at sleeve both ends, and plug is matched somebody with somebody with sleeve interference
Close, sleeve both ends be internally formed step to plug fill in depth carry out it is spacing.The structure of plug and sleeve is simple, connection knot
Structure is convenient.
Preferably, plug, towards one end of sleeve, the joint angle of its bottom surface and lateral surface is chamfering.It is easy to plug to fill in
Sleeve ends.
Magnetic stress sensor, including as described in the interior coil rack set outward, measuring coil and any one as described above
The shielding shell of magnetic stress sensor, coil rack are arranged to be set on the tubular structure of steel component periphery to be measured,
Measuring coil is wrapped in the periphery of coil rack, and coil rack lateral wall is provided with the limit for being used for limiting measuring coil winding position
Bit slice, coil rack and the measuring coil being wrapped on coil rack are located at the inside of shielding shell, the both ends of coil rack
Stretch into the first cavity of plug and spacing by the limited step on plug inwall.Directly coil rack is positioned at by plug
Sleeve inner, it is simple in construction, and can effectively prevent the electromagnetic interference of surrounding environment or the magnetic field of coil from leaking, ensure measurement essence
Degree.
From the foregoing, it will be observed that there is the utility model the electromagnetic interference of surrounding environment to be difficult to be penetrated into sensor internal, subtract simultaneously
The magnetic field of few sensor measuring coil is leaked, and ensures the beneficial effect of the measurement accuracy of magnetic stress sensor.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model magnetic stress sensor.
Fig. 2 is the structural representation of shell plug in the utility model.
Wherein：1st, coil rack, 11, banking stop, 2, measuring coil, 3, sleeve, 31, step, 4, plug, 41, first is empty
Chamber, the 42, second cavity, 43, limited step, 5, steel component to be measured.
Embodiment
The preferred embodiment of this patent is described in further detail below in conjunction with the accompanying drawings.
Magnetic stress sensor as shown in Figure 1, include coil rack 1, measuring coil 2 and shielding shell outward by interior.
Coil rack 1 is arranged to be set on the tubular structure of the periphery of steel component 5 to be measured, and measuring coil 2 is wound
In the periphery of coil rack 1, the lateral wall of coil rack 1 is provided with the banking stop 11 for being used for limiting measuring coil winding position, line
Ring framework 1 and the measuring coil 2 being wrapped on coil rack 1 are located at the inside of shielding shell.
Shielding shell includes a sleeve 3 and is separately positioned on the both ends of sleeve 3 with two plugs 4, two plugs 4, blocks up
First 4 at least inside its one end insertion sleeve 3.In the present embodiment, plug 4 is in the form of a column, external diameter and the both ends of sleeve 3 of plug 4
Internal diameter is matched, and plug 4 is interference fitted with sleeve 3, and the sidewall thickness at the both ends of sleeve 3 is less than the sidewall thickness in sleeve stage casing, makes set
Cylinder both ends be internally formed step 31 to plug fill in depth carry out it is spacing.Cylinder, plug direction are filled in for the ease of plug
The joint angle of one end of sleeve, its bottom surface and lateral surface is chamfering.
As shown in Fig. 2 the inside of plug 4 is provided with interconnected the first cavity 41 and the second cavity 42, first cavity
41st, the center line of the second cavity 42 and plug 4 overlaps, the first cavity 41 and the second cavity 42 respectively with the ft connection of plug 3, first
The diameter of cavity 41 is more than the diameter of the second cavity 42, makes to form limited step 43, the diameter of the first cavity 41 on plug inwall
Matched more than the external diameter of coil rack 1 or the diameter of the first cavity 41 with the external diameter of coil rack 1, enable the end of coil rack 1
Stretch into the first cavity 41.The diameter of second cavity 42 is more than external diameter of the internal diameter less than coil rack 1 of coil rack 1, passes through
Limited step 43 is spacing to coil rack 1, coil rack 1 is positioned inside sleeve 3, easy for installation, shields the knot of shell
Structure is simple.Also, the second cavity can insert for steel component to be measured.
The ratio between depth L1 and plug length L of wherein the first cavity are between 0.1-0.9, and the radius R1 of the first cavity is with blocking up
The ratio between external diameter R2 of head is between 0.25-2.5.
The magnetic stress sensor of said structure, the sleeve 3 and plug 4 for forming shielding shell are made by electrical pure iron, week
The electromagnetic interference in collarette border is difficult to be penetrated into sensor internal, while the magnetic field for reducing sensor measuring coil is leaked, and ensures magnetic
The measurement accuracy of strain gauge.
Claims (4)
1. the shielding shell of magnetic stress sensor, it is characterised in that it is made up of ferromagnetic material, including sleeve（3）Be symmetrically installed
Plug at sleeve both ends（4）, plug is at least in its one end insertion sleeve inner, plug（4）Inside is provided with the to be interconnected
One cavity（41）With the second cavity（42）, first cavity（41）, the second cavity（42）And plug（4）Center line overlap, the
One cavity（41）With the second cavity（42）Respectively with plug（4）Ft connection, the diameter of the first cavity are more than the straight of the second cavity
Footpath, make to form limited step on plug inwall（43）, wherein the depth of the first cavity（L1）With plug length（L）The ratio between in 0.1-
Between 0.9, the radius of the first cavity（R1）With the external diameter of plug（R2）The ratio between 0.25-2.5.
2. the shielding shell of magnetic stress sensor according to claim 1, it is characterised in that plug（4）It is cylindrical, block up
The external diameter and sleeve of head（3）The internal diameter matching at both ends, plug（4）With sleeve（3）Interference fit, sleeve both ends are internally formed platform
Rank（31）To plug fill in depth carry out it is spacing.
3. the shielding shell of magnetic stress sensor according to claim 1, it is characterised in that plug（4）Towards sleeve
The joint angle of one end, its bottom surface and lateral surface is chamfering.
4. magnetic stress sensor, it is characterised in that including by the interior coil rack set outward（1）, measuring coil（2）With such as power
Profit requires the shielding shell of the magnetic stress sensor any one of 1- claims 3, coil rack（1）It is arranged to wear
In steel component to be measured（5）The tubular structure of periphery, measuring coil（2）It is wrapped in coil rack（1）Periphery, coil bone
Frame lateral wall is provided with the banking stop for being used for limiting measuring coil winding position（11）, coil rack（1）And it is wrapped in coil bone
Measuring coil on frame（2）Positioned at the inside of shielding shell, coil rack（1）Both ends stretch into the first cavity of plug（41）
In and by the limited step on plug inwall（43）It is spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721315.4U CN206891619U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding shell mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721315.4U CN206891619U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding shell mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206891619U true CN206891619U (en) | 2018-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720721315.4U Active CN206891619U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding shell mechanism |
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| CN (1) | CN206891619U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
-
2017
- 2017-06-20 CN CN201720721315.4U patent/CN206891619U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
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