CN110440128B - Dynamic monitoring method and device for inner diameter shrinkage of wound metal liner - Google Patents
Dynamic monitoring method and device for inner diameter shrinkage of wound metal liner Download PDFInfo
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- CN110440128B CN110440128B CN201910694749.3A CN201910694749A CN110440128B CN 110440128 B CN110440128 B CN 110440128B CN 201910694749 A CN201910694749 A CN 201910694749A CN 110440128 B CN110440128 B CN 110440128B
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- metal liner
- eddy current
- current displacement
- shrinkage
- displacement sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
- F17C1/04—Protecting sheathings
- F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2154—Winding
Abstract
The invention relates to a dynamic monitoring method and a dynamic monitoring device for the inner diameter shrinkage of a wound metal liner. The invention measures the change of the inner diameter of the metal liner in real time by an eddy current displacement method, can provide accurate and effective process monitoring data for the research of the process parameters of the metal liner, further realizes the design of improving or optimizing the winding scheme, and can also monitor the product quality in real time in the manufacturing of wound products.
Description
Technical Field
The invention relates to a monitoring method, in particular to a dynamic monitoring method and a dynamic monitoring device for the inner diameter shrinkage of a wound metal liner.
Background
In the technical field of winding process, winding metal liner is a production process widely applied to products such as composite material gas cylinders, composite material pressure-bearing pipe fittings and the like. The fiber material is wound on the surface of the metal inner container (such as steel, aluminum alloy, titanium alloy and the like) by tension, so that the metal inner container is pressed in an initial state, the elastic working interval of the integral structure of the product is increased, and the purpose of increasing the rated working pressure of the product is achieved. However, no method for monitoring the shrinkage of the inner diameter of the metal liner in real time exists in the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a dynamic monitoring method for the shrinkage of the inner diameter of the metal liner, which can obtain real-time deformation data of the diameter of the liner on the premise of not influencing the winding production process, thereby realizing dynamic monitoring of the shrinkage of the inner diameter of the metal liner.
The invention also aims to provide a dynamic monitoring device for the inner diameter shrinkage of the wound metal liner, which is used for dynamically monitoring the inner diameter shrinkage of the wound metal liner from time to time by matching with the method.
The purpose of the invention can be realized by the following technical scheme:
a dynamic monitoring method for the shrinkage of the inner diameter of a wound metal liner comprises the following steps:
the eddy current displacement sensors are fixed on the base through the connecting support, and every two eddy current displacement sensors are distributed around the metal inner container in multiple groups;
before the fiber is wound outside the metal inner container, the distances d between the outer wall of the metal inner container and the two eddy current displacement sensors in each group are detected by the eddy current displacement sensors in the initial state1And d2；
In the winding process, under the action of fiber tension, the metal liner shrinks, the diameter of the metal liner changes, and the eddy current displacement sensors are used for detecting the distances d between the outer wall of the metal liner and the two eddy current displacement sensors in each group in the initial state of the metal liner1' and d2' at this time, the contraction amount of the inner diameter of the wound metal liner (1) is d1’+d2’-d1-d2；
The eddy current displacement sensors are distributed around the metal liner, so that multiple groups of shrinkage data at the same moment can be measured, the average value of the shrinkage data at the moment is taken as the measurement result at the moment, and the dynamic monitoring of the internal diameter shrinkage of the wound metal liner is completed by taking the average value of the multiple groups of shrinkage data at different moments.
Each group of eddy current displacement sensors and the center of the cross section of the metal liner are arranged on the same straight line and are arranged on two sides.
A dynamic monitoring device for the internal diameter shrinkage of a wound metal liner comprises an eddy current displacement sensor, a connecting bracket and a base,
one end of the connecting support is connected to the base, the other end of the connecting support is provided with a fixing support of a circular ring or circular arc structure, a plurality of eddy current displacement sensors are arranged in the fixing support, and the metal inner container to be detected is arranged in an area surrounded by the fixing support.
The eddy current displacement sensors are provided with a plurality of eddy current displacement sensors which are uniformly distributed on the inner side surface of the fixed support, every two eddy current displacement sensors form a detection group, and the two eddy current displacement sensors in the detection group are distributed on two sides of the diameter of the section of the metal liner. This kind of along a plurality of eddy current displacement sensor of hoop distribution on fixed bolster, can avoid the deformation condition that the metal inner bag is different in the winding process, improve real-time measurement accuracy, obtain metal inner bag internal diameter shrinkage through winding real-time supervision with data contrastive analysis to the metal inner bag. The inner diameter shrinkage of the metal liner in winding can be dynamically monitored.
The metal inner bag with the region that the fixed bolster encloses is concentric setting, can guarantee the accuracy of monitoring data like this, makes the distance between two eddy current displacement sensor and the metal inner bag surface keep equal at initial stage, when the size changes when the metal inner bag twines like this, can the accurate measurement change volume of both sides, the result accuracy that obtains like this is higher.
Compared with the prior art, the invention measures the real-time changed inner diameter shrinkage of the wound metal liner by an eddy current multipoint distance measurement method; on the premise of not influencing the winding process, the deformation condition of the metal inner container in winding is monitored in real time, so that help is provided for the research and determination of process parameters; the production quality of the product can also be monitored in real time during the manufacture of the wound product. The method has the characteristics of simple and easy equipment, simple operation and measurement, high measurement accuracy and the like.
Drawings
FIG. 1 is a schematic structural view of an inner diameter shrinkage dynamic monitoring device of a wound metal liner;
FIG. 2 is a schematic distribution diagram of eddy current displacement sensors on the outer side of a metal liner;
FIG. 3(a) is a schematic view of the measurement before the winding process begins;
fig. 3(b) is a schematic view of measurement after the winding process is started.
In the figure, 1-a metal inner container, 2-a base, 3-a connecting support, 4-an eddy current displacement sensor and 5-a fixed support.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Examples
The structure of the dynamic monitoring device for the inner diameter shrinkage of the wound metal liner is shown in figure 1, and the device comprises a base 2, a connecting support 3, an eddy current displacement sensor 4 and a fixing support 5. The bottom of connecting bracket 3 that uses is connected on base 2, and the top is equipped with fixed bolster 5 that is ring or circular-arc structure, and fixed bolster 5 that uses in this embodiment is circular-arc structure, conveniently puts into the metal inner bag 1 that detects like this and conveniently with its regulation. Two eddy current displacement sensors 4 are arranged in the fixed support 5 and are uniformly distributed on the inner side surface of the fixed support 5. The metal liner 1 to be detected is arranged in the area enclosed by the fixed support 5. In order to obtain better detection precision, the metal inner container 1 and the fixed support 5 are concentrically arranged in an area enclosed by the metal inner container.
Every two eddy current displacement sensors 4 used form a detection group and are distributed on two sides of the diameter of the section of the metal liner 1, as shown in fig. 2, the accuracy of monitoring data can be guaranteed, the distance between the two eddy current displacement sensors and the outer surface of the metal liner is kept equal in the initial stage, the variable quantity of the two sides can be accurately measured when the size of the metal liner is changed during winding, and the accuracy of the obtained result is high.
When the device is used for dynamically monitoring the internal diameter shrinkage of the wound metal liner, the following steps are adopted:
1. according to the mode, the eddy current displacement sensors 4 are fixed on the base 2 through the connecting support 3, and a plurality of groups of eddy current displacement sensors 4 are distributed around the metal liner 1 in every two groups;
2. before the winding process is started, the distances between the outer wall of the metal liner and the 1# and 2# eddy current displacement sensors are measured (as shown in fig. 3 (a)), and the distances are measured to be d respectively1And d2。
3. During the winding process, inUnder the action of fiber tension, the metal liner shrinks, the diameter of the metal liner changes (as shown in fig. 3 (b)), and the 1# and 2# eddy current displacement sensors can accurately measure the distances d between the sensor and the outer wall of the metal liner at any moment1' and d2' the contraction amount of the inner diameter of the wound metal liner corresponding to the moment is d1’+d2’-d1-d2。
4. The eddy current displacement sensors 4 are distributed around the metal liner, so that a plurality of groups of shrinkage data at the same moment can be measured, the average value of the shrinkage data at the moment is taken as the measurement result at the moment and the average value of the shrinkage data at different moments, and the dynamic monitoring of the internal diameter shrinkage of the wound metal liner is completed.
The linear measuring range of the eddy current sensor 4 is selected to be 2mm, the precision is +/-0.01 mm, and the measured data before winding is d1＝30+0.45mm、d2Data d measured after a period of winding time, 30+0.26mm1’＝30+0.52mm、d2The bore shrinkage at this time was found to be, by calculation, 30+0.44 mm: 0.25 mm.
In the description of the present invention, it is to be understood that the terms "bottom end," "top end," "inner surface," "two sides," and the like, refer to an orientation or positional relationship merely for convenience in describing the present invention and to simplify description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. A dynamic monitoring method for the shrinkage of the inner diameter of a wound metal liner is characterized by comprising the following steps:
the eddy current displacement sensors (4) are fixed on the base (2) through the connecting support (3), and every two eddy current displacement sensors (4) are distributed around the metal liner (1) in multiple groups;
before the metal inner container (1) is wound with fibers, the distances between the outer wall and the two eddy current displacement sensors (4) in each group are respectively equal to that between the outer wall and the two eddy current displacement sensors (4) in the initial state of the metal inner container detected by the eddy current displacement sensors (4)d 1Andd 2；
in the winding process, under the action of fiber tension, the metal liner (1) shrinks, the diameter of the metal liner (1) changes, and the eddy current displacement sensors (4) are used for detecting the distances between the outer wall of the metal liner in the initial state and the two eddy current displacement sensors (4) in each groupd 1' andd 2', the inner diameter shrinkage of the wound metal liner (1) isd 1’+ d 2’- d 1- d 2；
The eddy current displacement sensors (4) are distributed around the metal liner, so that a plurality of groups of shrinkage data at the same moment can be measured, the average value of the shrinkage data is taken as the measurement result at the moment and the average value of the shrinkage data at different moments, and the dynamic monitoring of the shrinkage of the inner diameter of the wound metal liner is completed.
2. The dynamic monitoring method for the shrinkage of the inner diameter of the wound metal liner according to claim 1, wherein each group of eddy current displacement sensors (4) and the center of the cross section of the metal liner (1) are arranged on the same straight line and on two sides.
3. A dynamic monitoring device for the shrinkage of the inner diameter of a wound metal liner is characterized by comprising an eddy current displacement sensor (4), a connecting bracket (3) and a base (2),
one end of the connecting support (3) is connected to the base (2), the other end of the connecting support is provided with a fixing support (5) of a circular ring or circular arc structure, a plurality of eddy current displacement sensors (4) are arranged in the fixing support (5), and the metal liner (1) to be detected is arranged in an area surrounded by the fixing support (5).
4. The dynamic monitoring device for the internal diameter shrinkage of the wound metal liner as claimed in claim 3, wherein the eddy current displacement sensors (4) are provided in a plurality of numbers, and are uniformly distributed on the inner side surface of the fixed support (5).
5. The dynamic monitoring device for the shrinkage of the inner diameter of the wound metal liner as claimed in claim 4, wherein every two eddy current displacement sensors (4) form a detection group.
6. The dynamic monitoring device for the internal diameter shrinkage of the wound metal liner according to claim 5, wherein the two eddy current displacement sensors (4) in the detection group are distributed on two sides of the section diameter of the metal liner (1).
7. The dynamic monitoring device for the internal diameter shrinkage of the wound metal liner as claimed in claim 3, wherein the region enclosed by the metal liner (1) and the fixed support (5) is concentrically arranged.
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| CN201910694749.3A CN110440128B (en) | 2019-07-30 | 2019-07-30 | Dynamic monitoring method and device for inner diameter shrinkage of wound metal liner |
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| CN201910694749.3A CN110440128B (en) | 2019-07-30 | 2019-07-30 | Dynamic monitoring method and device for inner diameter shrinkage of wound metal liner |
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| CN110440128B true CN110440128B (en) | 2021-04-27 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6069399A (en) * | 1983-09-24 | 1985-04-20 | Akihiro Takiguchi | Interior inspector for cryogenic liquidized gas tank |
| CN101329160A (en) * | 2008-07-31 | 2008-12-24 | 上海汽车集团股份有限公司 | Method for testing sealing ring motion state in rotary sealing device |
| CN101559572A (en) * | 2009-05-19 | 2009-10-21 | 武汉华中数控股份有限公司 | Method and device for automatic alignment and on-line real-time detection in grinding of ball valve |
| CN102501137A (en) * | 2011-11-03 | 2012-06-20 | 西安交通大学 | Online monitoring device for radial rotation accuracy of main shaft |
| CN103528494A (en) * | 2013-10-17 | 2014-01-22 | 集美大学 | Device for measuring creep deformation of eddy current |
| CN203785620U (en) * | 2014-01-27 | 2014-08-20 | 哈尔滨电机厂有限责任公司 | Bidirectional thrust bearing oil film thickness measuring device |
| CN105651510A (en) * | 2015-12-28 | 2016-06-08 | 哈尔滨工业大学 | Method for measuring axial vibration of high-speed lightweight disk gear |
-
2019
- 2019-07-30 CN CN201910694749.3A patent/CN110440128B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6069399A (en) * | 1983-09-24 | 1985-04-20 | Akihiro Takiguchi | Interior inspector for cryogenic liquidized gas tank |
| CN101329160A (en) * | 2008-07-31 | 2008-12-24 | 上海汽车集团股份有限公司 | Method for testing sealing ring motion state in rotary sealing device |
| CN101559572A (en) * | 2009-05-19 | 2009-10-21 | 武汉华中数控股份有限公司 | Method and device for automatic alignment and on-line real-time detection in grinding of ball valve |
| CN102501137A (en) * | 2011-11-03 | 2012-06-20 | 西安交通大学 | Online monitoring device for radial rotation accuracy of main shaft |
| CN103528494A (en) * | 2013-10-17 | 2014-01-22 | 集美大学 | Device for measuring creep deformation of eddy current |
| CN203785620U (en) * | 2014-01-27 | 2014-08-20 | 哈尔滨电机厂有限责任公司 | Bidirectional thrust bearing oil film thickness measuring device |
| CN105651510A (en) * | 2015-12-28 | 2016-06-08 | 哈尔滨工业大学 | Method for measuring axial vibration of high-speed lightweight disk gear |
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| CN110440128A (en) | 2019-11-12 |
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