CN205317214U - Pipeline gesture is magnetism shielding structure for check out test set - Google Patents
Pipeline gesture is magnetism shielding structure for check out test set Download PDFInfo
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- CN205317214U CN205317214U CN201620039173.9U CN201620039173U CN205317214U CN 205317214 U CN205317214 U CN 205317214U CN 201620039173 U CN201620039173 U CN 201620039173U CN 205317214 U CN205317214 U CN 205317214U
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- radome
- shielding structure
- detection device
- depressed part
- pipeline
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- 230000005389 magnetism Effects 0.000 title abstract 6
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims abstract description 25
- 238000012216 screening Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 29
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 235000019994 cava Nutrition 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model discloses a pipeline gesture is magnetism shielding structure for check out test set belongs to petrochemical and natural gas line detecting system structure field. The utility model provides a pipeline gesture is magnetism shielding structure for check out test set, including cylindric shield cover and overlap joint in screening cover on the shield cover, the middle part undercut of screening cover forms the depressed part, is located the depressed part periphery the part of screening cover is the installation department, the installation department be used for with the shield cover is connected. The utility model provides an inside sensitive apparatus of pipeline gesture is magnetism shielding structure for check out test set guard screen structure can normally be worked under weak magnetic field environment, and simultaneously, the screening cover includes installation department and depressed part, and the installation department is thick load -carrying members, guarantees magnetism shielding structure's stability, and the depressed part caves in in the installation department, has alleviateed magnetism shielding structure's weight.
Description
Technical field
This utility model relates to petrochemical industry and natural gas line detection system structure field, is specifically related to a kind of pipeline posture detection device magnet shielding structure.
Background technology
In petrochemical industry and Gas Industry, due to factors such as long corrosion, wear and stress, ferromagnetism pipe-line can gradually form the various defect such as mechanical crackle and corrosion failure. Owing to most pipelines are all buried at the bottom of ground or under seabed, maintenance cost is very high, therefore the pipeline posture detection device of widely used high-precision automatic carries out defect inspection and is accurately positioned in the industry, and guidance technology personnel arrangement rapid-maintenance reduces cost to greatest extent.
Pipeline posture detection device generally all adopts the inertia device such as gyro, gravity sensor to carry out posture position detection, obtains accurate defect of pipeline positional information by resolving. Optical inertial device is widely used due to its high performance-price ratio, but its shortcoming is that magnetic field is more sensitive, particularly when pipeline posture detection device runs on the ground end, depths, seabed, is subject to the impact of extraneous relatively high-intensity magnetic field, and product may directly lose efficacy. Accordingly, it would be desirable to pipeline posture detection device is carried out Magnetic Shield designs, the magnetic-sensitive elements within pipeline posture detection device provides good electromagnetic compatible environment. It addition, in magnet shielding structure design process, the thickness of magnet shielding structure is a key parameter, directly determine magnetic shield usefulness, simultaneously as the density of the material of magnet shielding structure employing is greatly generally relatively larger, the weight of system is bigger.
Utility model content
The purpose of this utility model is in that to propose a kind of magnet shielding structure suitable in pipeline posture detection device, has lighter weight while effectively shielding low frequency (frequency is less than 100Hz) low-intensity magnetic field.
For reaching this purpose, this utility model by the following technical solutions:
A kind of pipeline posture detection device magnet shielding structure, including cylindric radome and the screening cover being overlapped on described radome, the middle part concave downward of described screening cover forms depressed part, the part being positioned at the described screening cover of described depressed part periphery is installation portion, and installation portion is for being connected with described radome.
As the preferred technical scheme of one, the thickness of described radome is SE,
Wherein, H0、H1The respectively magnetic field intensity of certain point, the internal diameter of a, b respectively radome and external diameter in magnetic field, shielding front and back, μ r is the relative permeability of the material that radome adopts.
As the preferred technical scheme of one, the thickness of described depressed part is be more than or equal to the thickness SE of described radome.
As the preferred technical scheme of one, the position beyond the center of circle of described depressed part offers through hole, described through hole is provided with annular and holds chamber.
As the preferred technical scheme of one, described through hole is in the centre position of the radius of described depressed part or the region between centre position and the edge of described depressed part of the radius of described depressed part.
As the preferred technical scheme of one, the periphery of described installation portion circumferentially offers the first installing hole, the upper end of described radome is correspondingly arranged on the second installing hole, is connected on described radome by described screening cover through described first installing hole and described second installing hole by screw.
As the preferred technical scheme of one, described installation portion being circumferentially evenly arranged with at least four the first installing hole, the upper end of described radome is correspondingly arranged at least four the second installing hole.
As the preferred technical scheme of one, being provided with installing rack in described radome, described radome is divided into upper cavity volume and lower cavity volume by described installing rack, and described upper cavity volume is used for pipe laying posture detection device.
It is made up of fe-ni-based soft magnetic alloy material as the preferred technical scheme of one, described radome and at least one in described screening cover.
The beneficial effects of the utility model are as follows:
The Sensitive Apparatus of pipeline posture detection device magnet shielding structure guard shield inside configuration that this utility model provides can normal operation under low-intensity magnetic field environment; simultaneously; screening cover includes installation portion and depressed part; installation portion is thicker load-carrying members; ensure the stability of magnet shielding structure; depressed part is depressed in installation portion, alleviates the weight of magnet shielding structure.
Accompanying drawing explanation
Fig. 1 is the assembled state structural representation of the pipeline posture detection device magnet shielding structure that embodiment of the present utility model provides;
Fig. 2 is the decomposition texture schematic diagram of the pipeline posture detection device magnet shielding structure that embodiment of the present utility model provides;
Fig. 3 is endless cylindrical cavity model.
In figure, 1, screening cover; 11, depressed part; 12, installation portion; 2, radome; 3, annular holds chamber; 4, installing rack.
Detailed description of the invention
The technical solution of the utility model is further illustrated below in conjunction with accompanying drawing and by detailed description of the invention.
Embodiment:
Embodiment of the present utility model provides a kind of pipeline posture detection device magnet shielding structure, as shown in Figure 1, it includes cylindric radome 2 and the screening cover 1 being overlapped on radome 2, the middle part concave downward of screening cover 1 forms depressed part 11, the part being positioned at the screening cover 1 of depressed part 11 periphery is installation portion 12, installation portion 12 is for being connected with radome 2, and radome 2 and screening cover 1 are made by fe-ni-based soft magnetic alloy material.In order to improve the shield effectiveness of shielding construction, screening cover 1 and radome 2 adopt bridging type to design, and ensure that overlapping the slot between the two is as far as possible little by process means.
The Sensitive Apparatus of pipeline posture detection device magnet shielding structure guard shield inside configuration that the present embodiment provides can normal operation under low-intensity magnetic field environment; simultaneously; screening cover 1 includes installation portion 12 and depressed part 11; installation portion 12 is thicker load-carrying members; ensure the stability of magnet shielding structure; depressed part 11 is depressed in installation portion 12, alleviates the weight of magnet shielding structure.
Radome 2 is uniform thickness thin-wall construction, plays main shielding action, in magnet shielding structure design process, the thickness of radome 2 is a key parameter, directly determine magnetic shield usefulness, and owing to fe-ni-based soft magnetic alloy density is big, the weight of system is bigger. According to electromagnetic theory, as shown in Figure 3, based on endless cylindrical cavity model, the shielding properties of cylindrical shield structure is analyzed, according to formula (1), the shield effectiveness of shielding construction is estimated, can reversely calculate the thickness of radome 2 when given shield effectiveness.
In formula (1), H0、H1The respectively magnetic field intensity of certain point, the internal diameter of a, b respectively radome 2 and external diameter in magnetic field, shielding front and back, μ r is the relative permeability of the material that radome 2 adopts. But, above formula is based on desirable endless cylindrical cavity model inference and obtains, therefore, in practical engineering application process, it should also be taken into account that the perforate of shielding construction, the lap gap impact on shielding properties, shield effectiveness and radome 2 thickness parameter are suitably revised. Adopt the radome 2 of above-mentioned thickness; can effectively shield low frequency (frequency is less than 100Hz) low-intensity magnetic field; decay 20～60dB by the magnetic field intensity outside shielding construction; the Sensitive Apparatus of guard shield inside configuration can normal operation under low-intensity magnetic field environment; while ensureing the shield effectiveness of shielding construction, reduce the weight of shielding construction as far as possible.
In order to alleviate the weight of magnet shielding structure while ensureing Magnetic Shielding Effectiveness, it is possible to arrange the thickness of depressed part 11 with reference to the thickness of radome 2, make the thickness thickness SE be more than or equal to radome 2 of depressed part 11.
Screening cover 1 and radome 2 to reduce perforate as much as possible, both ensureing, forms complete magnetic conductor continuously, reduce electromagnetic wave and be penetrated into the leakage rate within shielding construction by perforate and gap. But, when inevitably needing to arrange perforate, such as, pipeline posture detection device requires over adapter and is attached with outside device, through hole is offered in position beyond the center of circle of above-mentioned depressed part 11, being provided with annular on through hole and hold chamber 3, annular is held chamber 3 and is used for holding above-mentioned adapter. Preferably, through hole, in the centre position of the radius of depressed part 11 or the region between centre position and the edge of depressed part 11 of the radius of depressed part 11, is penetrated into the leakage rate within shielding construction reducing electromagnetic wave.
The periphery of above-mentioned installation portion 12 circumferentially offers the first installing hole, and the upper end of radome 2 is correspondingly arranged on the second installing hole, is connected on radome 2 by screening cover 1 through the first installing hole and the second installing hole by screw. The quantity of the first installing hole and the second installing hole and arrangement can be configured according to specific needs, screening cover 1 can be met be stably connected with radome 2, preferably, the first installing hole, the second installing hole is made to be uniformly distributed circumferentially respectively on installation portion 12, radome 2.Such as, installation portion 12 being circumferentially evenly arranged with at least four the first installing hole, the upper end of radome 2 is correspondingly arranged at least four the second installing hole.
Being provided with installing rack 4 in above-mentioned radome 2, radome 2 is divided into upper cavity volume and lower cavity volume by installing rack 4, and upper cavity volume is used for pipe laying posture detection device, and lower cavity volume may be used for placing some other electric elements etc.
Know-why of the present utility model is described above in association with specific embodiment. These describe and are intended merely to explanation principle of the present utility model, and can not be construed to the restriction to this utility model protection domain by any way. Based on explanation herein, those skilled in the art need not pay performing creative labour can associate other detailed description of the invention of the present utility model, and these modes fall within protection domain of the present utility model.
Claims (9)
1. a pipeline posture detection device magnet shielding structure, it is characterized in that, including cylindric radome (2) and the screening cover (1) that is overlapped on described radome (2), the middle part concave downward of described screening cover (1) forms depressed part (11), the part being positioned at the described screening cover (1) of described depressed part (11) periphery is installation portion (12), and installation portion (12) is for being connected with described radome (2).
2. pipeline posture detection device magnet shielding structure according to claim 1, it is characterised in that the thickness of described radome (2) is SE,
Formula 1,
Wherein, H0、H1The respectively magnetic field intensity of certain point, the internal diameter of a, b respectively radome (2) and external diameter in magnetic field, shielding front and back, μ r is the relative permeability of the material that radome (2) adopts.
3. pipeline posture detection device magnet shielding structure according to claim 2, it is characterised in that the thickness of described depressed part (11) is be more than or equal to the thickness SE of described radome (2).
4. according to the arbitrary described pipeline posture detection device magnet shielding structure of claims 1 to 3, it is characterized in that, position beyond the center of circle of described depressed part (11) offers through hole, described through hole is provided with annular and holds chamber (3).
5. pipeline posture detection device magnet shielding structure according to claim 4, it is characterized in that, described through hole be positioned at the radius of described depressed part (11) centre position or be positioned at described depressed part (11) radius centre position and the edge of described depressed part (11) between region.
6. according to the arbitrary described pipeline posture detection device magnet shielding structure of claims 1 to 3, it is characterized in that, the periphery of described installation portion (12) circumferentially offers the first installing hole, the upper end of described radome (2) is correspondingly arranged on the second installing hole, is connected on described radome (2) by described screening cover (1) through described first installing hole and described second installing hole by screw.
7. pipeline posture detection device magnet shielding structure according to claim 6, it is characterized in that, circumferentially being evenly arranged with at least four the first installing hole on described installation portion (12), the upper end of described radome (2) is correspondingly arranged at least four the second installing hole.
8. according to the arbitrary described pipeline posture detection device magnet shielding structure of claims 1 to 3, it is characterized in that, described radome (2) is provided with installing rack (4), described radome (2) is divided into upper cavity volume and lower cavity volume by described installing rack (4), and described upper cavity volume is used for pipe laying posture detection device.
9. according to the arbitrary described pipeline posture detection device magnet shielding structure of claims 1 to 3, it is characterised in that described radome (2) and at least one in described screening cover (1) are made up of fe-ni-based soft magnetic alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620039173.9U CN205317214U (en) | 2016-01-15 | 2016-01-15 | Pipeline gesture is magnetism shielding structure for check out test set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620039173.9U CN205317214U (en) | 2016-01-15 | 2016-01-15 | Pipeline gesture is magnetism shielding structure for check out test set |
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| CN205317214U true CN205317214U (en) | 2016-06-15 |
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| CN201620039173.9U Expired - Fee Related CN205317214U (en) | 2016-01-15 | 2016-01-15 | Pipeline gesture is magnetism shielding structure for check out test set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117015224A (en) * | 2023-09-28 | 2023-11-07 | 国网江苏省电力有限公司营销服务中心 | Electromagnetic shielding device and system for keeping superconducting state of Josephson junction |
-
2016
- 2016-01-15 CN CN201620039173.9U patent/CN205317214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117015224A (en) * | 2023-09-28 | 2023-11-07 | 国网江苏省电力有限公司营销服务中心 | Electromagnetic shielding device and system for keeping superconducting state of Josephson junction |
| CN117015224B (en) * | 2023-09-28 | 2024-02-20 | 国网江苏省电力有限公司营销服务中心 | Electromagnetic shielding device and system for keeping superconducting state of Josephson junction |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20170115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |