CN113008948A - Pressure container and defect detection method thereof - Google Patents
Pressure container and defect detection method thereof Download PDFInfo
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- CN113008948A CN113008948A CN202110218364.7A CN202110218364A CN113008948A CN 113008948 A CN113008948 A CN 113008948A CN 202110218364 A CN202110218364 A CN 202110218364A CN 113008948 A CN113008948 A CN 113008948A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
Abstract
The invention discloses a pressure vessel and a defect detection method thereof, and relates to the technical field of pressure vessel detection, wherein the pressure vessel comprises a cylinder body, a connecting pipe channel and a graphene strain sensor, the cylinder body comprises a vessel wall and an inner container, wherein: the inner container is arranged inside the container wall, one end of the connecting pipe channel is communicated with the inner container, the other end of the connecting pipe channel penetrates through the container wall to be communicated with the outside, and the graphene strain sensor is arranged in the container wall. According to the invention, the graphene strain sensor is arranged in the wall of the pressure container, so that real-time detection of the inside and the outside of the pressure container is realized, the damage condition of the pressure container can be reflected rapidly and accurately, and the occurrence of major accidents is avoided.
Description
Technical Field
The invention relates to the technical field of pressure container detection, in particular to a pressure container and a defect detection method thereof.
Background
According to stress evaluation and analysis of the pressure container, the overall rigidity and stability of the pressure container are weakened by the opening position of the main pump connecting pipe, and the stress state of the opening position is often influenced by various loads, so that the main pump connecting pipe is easy to generate a stress concentration phenomenon, and the integral structure is damaged due to local stress. The phenomenon that the pressure container is damaged due to stress concentration often occurs in actual engineering, not only can damage an engineering field, but also seriously harms the life safety of field personnel, and therefore, the detection work of the pressure container is particularly important.
In the prior art, the common nondestructive testing methods for pressure vessels include magnetic particle testing (MT), Penetration Testing (PT), Ultrasonic Testing (UT), Ray Testing (RT), eddy current testing (ET), etc. Wherein: for magnetic particle inspection, although the specific position, size and shape of a defect can be visually judged, the surface condition of a magnetic material object can be detected; for the penetration detection, although the method can be simultaneously suitable for ferromagnetic metal material objects and non-metal material objects, the method can only detect the defects of openings and cracks on the surface of the object to be detected, can not detect the defects in the material of the object to be detected, and the residual detection liquid on the object to be detected is harmful to human bodies; for ultrasonic detection, although the ultrasonic detection device can be suitable for pressure containers with large wall thicknesses, and subsequent cleaning procedures are not needed, the ultrasonic detection device has high operation requirements on detection equipment and needs abundant experience of detection personnel; for ray detection, although the device is suitable for detection of various metal materials, non-metal materials and composite materials, the detection cost is high, radiation generated by rays to a human body is harmful to health, and high-voltage danger exists due to overhigh working voltage of a ray device; for eddy current detection, the device is suitable for equipment detection of various steel, titanium, nickel, aluminum, copper, alloys and other conductive materials, can be in direct contact with an object to be detected or not, does not need a coupling agent or an additive solution and the like to coat the surface of the object to be detected, but is difficult to apply to a test piece with a complex shape and can only detect the defects of the surface and the near surface of the object to be detected, and the defects buried deeply cannot be detected.
In addition to the respective disadvantages of the above-mentioned techniques, there is a common problem that they are all able to perform the inspection only after the pressure vessel has been assembled, but not in real time during the process.
In the prior art, chinese utility model patent with publication number CN205535030U discloses a novel pressure vessel based on graphite alkene in 2016 month 08 and 31, including hollow inner bag and shell, the inner bag is placed inside the shell, and the shell is equipped with the container entry that accesss to the inner bag inside, and graphite alkene layer coats in the surface of shell, though this scheme can protect pressure vessel not corroded to a certain extent, but fails to solve unable detection pressure vessel internal defect among the prior art, can't carry out real-time detection scheduling problem in the use, consequently, urgently needs a pressure vessel and its defect detection method.
Disclosure of Invention
The invention provides a pressure container and a defect detection method thereof, aiming at solving the problems that the internal defects of the pressure container cannot be detected, the real-time detection cannot be carried out in the using process and the like in the prior art.
The primary objective of the present invention is to solve the above technical problems, and the technical solution of the present invention is as follows:
the pressure vessel comprises a cylinder body and a connecting pipe channel, wherein the connecting pipe channel is arranged on the side wall of the cylinder body, the cylinder body is used for containing liquid or gas, and the connecting pipe channel is used for allowing liquid or gas to enter and exit.
As an improvement of the invention, the cylinder comprises a wall, an inner container and a graphene strain sensor, wherein the inner container is arranged inside the wall, and the graphene strain sensor is embedded in the wall.
As an improvement of the present invention, the wall of the container comprises an outer wall and an inner wall, and the graphene strain sensor comprises a resistance strain gauge and a graphene sheet, wherein: the graphene sheet is embedded between the outer wall and the inner wall, and the resistance strain gauge is attached to the graphene sheet.
As an improvement of the invention, the surface of the outer wall is uniformly coated with a graphene coating.
As a refinement of the invention, the thickness of the outer wall is the same as the thickness of the inner wall.
As a refinement of the present invention, the graphene sheet has a thickness of 0.4 mm to 0.6 mm.
As an improvement of the invention, the graphene sheet is formed by stacking a plurality of graphene films, and each graphene film is of a crisscross net structure.
As the improvement of the invention, the bottom of the cylinder body is also provided with two support legs; the two support legs are symmetrically arranged about the center of the bottom of the barrel.
As a modification of the invention, the connecting pipe channel is L-shaped.
A pressure vessel defect detection method comprises the following steps:
s1, stacking the multilayer graphene films into graphene sheets;
s2, embedding the graphene sheet between the outer wall and the inner wall of the pressure container;
s3, attaching the resistance strain gauge to the graphene sheet, wherein when the outer wall or the inner wall of the pressure container is damaged, the graphene sheet is stretched, and the resistance strain gauge generates a detection signal;
s4, setting a signal collector to collect the detection signal generated by the resistance strain gauge;
and S5, setting a processor for processing the detection signals collected by the signal collector.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the invention, the graphene strain sensor is arranged in the wall of the pressure container, so that real-time detection of the inside and the outside of the pressure container is realized, the damage condition of the pressure container can be reflected rapidly and accurately, and the occurrence of major accidents is avoided.
Drawings
FIG. 1 is a schematic view of a pressure vessel according to the present invention;
FIG. 2 is an enlarged view of the point A in FIG. 1;
FIG. 3 is a diagram of the steps of the method of the present invention;
wherein the reference numbers in the figures represent respectively: 1-cylinder body; 2, connecting a pipe channel; 11 to the wall of the vessel; 12-inner container; 13-support legs; 111-outer wall; 112-inner wall; 113-graphene sheets.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1, a pressure vessel includes a cylinder 1, a connecting pipe channel 2, and a graphene strain sensor, where the cylinder 1 includes a vessel wall 11 and an inner container 12, where: the inner container 12 is arranged inside the container wall 11, one end of the connecting pipe channel 2 is communicated with the inner container 12, the other end of the connecting pipe channel 2 penetrates through the container wall 11 to be communicated with the outside, and the graphene strain sensor is arranged in the container wall 11.
In the technical scheme, the graphene strain sensor is arranged in the wall 11 of the pressure container, so that the real-time detection of the inside and the outside of the pressure container is realized, the damage condition of the pressure container can be reflected rapidly and accurately, and the occurrence of major accidents is avoided.
As shown in fig. 2, preferably, the wall 11 includes an outer wall 111 and an inner wall 112, and the graphene strain sensor includes a resistance strain gauge and a graphene sheet 113, wherein: the graphene sheet 113 is embedded between the outer wall 111 and the inner wall 112, and the resistance strain gauge is attached to the graphene sheet 113.
In the technical scheme, when the pressure container is forged and formed, namely the graphene sheet 113 is embedded between the outer wall 111 and the inner wall 112, and the graphene sheet 113 is ensured to be tightly attached to the outer wall 111 and the inner wall 112, so that the graphene sheet can meet the use requirement in a high-temperature and high-pressure environment; when the outer wall 111 or the inner wall 112 of the pressure container is damaged, if cracks occur, the graphene sheet 113 will generate strain, so that the resistance value of the resistance strain gauge attached to the graphene sheet will also generate strain, a voltage is added to the input end of the resistance strain gauge, the change of the voltage is used as a detection signal, and the damage of the outer wall 111 or the inner wall 112 of the pressure container can be rapidly known through collecting and processing the detection signal.
Preferably, the surface of the outer wall 111 is uniformly coated with a graphene coating.
In the technical scheme, the graphene coating has good thermal stability, chemical stability and corrosion resistance, and can ensure that the surface of the outer wall 111 of the pressure container can be prevented from being corroded and static electricity after being coated, so that the pressure container is prevented from being damaged from the outer side.
Preferably, the thickness of the outer wall 111 is the same as the thickness of the inner wall 112.
In the above technical solution, the graphene sheet 113 is embedded at 1/2 of the wall thickness of the wall 11, so as to achieve the purpose of simultaneously detecting the outer wall 111 and the inner wall 112.
Preferably, the graphene sheet 113 has a thickness of 0.4 mm to 0.6 mm.
In the above technical solution, the thickness of the graphene sheet 113 of this embodiment is 0.5 mm, so that the outer wall 111 and the inner wall 112 are more easily attached in the forging process, thereby avoiding excessive increase in cost.
Preferably, the graphene sheet 113 is formed by stacking a plurality of graphene films, each graphene film having a crisscross network structure.
In the technical scheme, the net structure improves the tensile strength and the elastic modulus of the graphene film, so that the service life of the graphene sheet 113 is prolonged.
Preferably, the top and the bottom of the cylinder 1 are both provided with an arc shape protruding outwards.
In the technical scheme, the square top and the square bottom are easy to deform, and the manufacturing cost is higher.
Preferably, the bottom of the cylinder 1 is further provided with two support legs 13; the two legs 13 are arranged symmetrically about the center of the bottom of the barrel 1.
In the technical scheme, the support legs 13 which are symmetrically arranged can enhance the balance of the pressure container and prevent accidents caused by the side turning of the pressure container.
Preferably, the nozzle channel 2 is L-shaped.
In the technical scheme, the L-shaped connecting pipe channel is convenient to be connected with the main pump.
In summary, the detection process of the pressure vessel is as follows: when the pressure container is forged and formed, namely a graphene strain sensor is arranged between the outer wall 111 and the inner wall 112; when the pressure vessel is used, if the pressure vessel is damaged and has defects such as cracks, the graphene strain sensor can timely send out detection signals, and the damage condition of the outer wall 111 or the inner wall 112 of the pressure vessel can be rapidly known by collecting and processing the detection signals.
Example 2
As shown in fig. 3, a method for detecting defects of a pressure vessel includes the following steps:
s1, stacking the multilayer graphene films into graphene sheets 113;
s2, embedding the graphene sheet 113 between the outer wall 111 and the inner wall 112 of the pressure container;
s3, attaching the resistance strain gauge to the graphene sheet 113, wherein when the outer wall 111 or the inner wall 112 of the pressure container is damaged, the graphene sheet 113 is stretched, and the resistance strain gauge generates a detection signal;
s4, setting a signal collector to collect the detection signal generated by the resistance strain gauge;
and S5, setting a processor for processing the detection signals collected by the signal collector.
In the technical scheme, the graphene sheet 113 and the resistance strain gauge jointly form the graphene strain sensor, when the outer wall 111 or the inner wall 112 of the pressure container is damaged, a detection signal can be generated, and by acquiring and processing the detection signal, a detector can rapidly acquire the damaged alarm information of the pressure container and timely inform workers on the site, so that the life safety of the workers on the site is guaranteed.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A pressure vessel, comprising a cylinder (1), a connecting pipe channel (2), and a graphene strain sensor, wherein the cylinder (1) comprises a vessel wall (11) and an inner container (12), and wherein: the inner container (12) is arranged inside the container wall (11), one end of the connecting pipe channel (2) is communicated with the inner container (12), the other end of the connecting pipe channel (2) penetrates through the container wall (11) to be communicated with the outside, and the graphene strain sensor is arranged in the container wall (11).
2. A pressure vessel according to claim 1, wherein the wall (11) comprises an outer wall (111), an inner wall (112), and the graphene strain sensor comprises a resistive strain gauge, graphene sheets (113), wherein: the graphene sheet (113) is embedded between the outer wall (111) and the inner wall (112), and the resistance strain gauge is attached to the graphene sheet (113).
3. A pressure vessel according to claim 2, characterized in that the surface of the outer wall (111) is evenly coated with graphene.
4. A pressure vessel according to claim 2, characterized in that the thickness of the outer wall (111) is the same as the thickness of the inner wall (112).
5. A pressure vessel according to claim 2, wherein the graphene sheets (113) have a thickness of 0.4 mm to 0.6 mm.
6. A pressure vessel according to claim 3, wherein the graphene sheets (113) are formed by stacking a plurality of graphene films, each graphene film having a criss-cross network structure.
7. A pressure vessel according to claim 1, characterized in that the top and bottom of the vessel body (1) are provided in an outwardly convex arc shape.
8. A pressure vessel according to claim 1, characterized in that the bottom of the cylinder (1) is further provided with two legs (13); the two support legs (13) are symmetrically arranged relative to the center of the bottom of the barrel body (1).
9. A pressure vessel according to claim 1, characterized in that the nozzle channel (2) is L-shaped.
10. A method for detecting defects of a pressure container is characterized by comprising the following steps:
s1, stacking the multilayer graphene films into graphene sheets (113);
s2, embedding the graphene sheet (113) between the outer wall (111) and the inner wall (112) of the pressure container;
s3, attaching the resistance strain gauge to the graphene sheet (113), wherein when the outer wall (111) or the inner wall (112) of the pressure container is damaged, the graphene sheet (113) is stretched, and the resistance strain gauge generates a detection signal;
s4, setting a signal collector to collect the detection signal generated by the resistance strain gauge;
and S5, setting a processor for processing the detection signals collected by the signal collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110218364.7A CN113008948A (en) | 2021-02-26 | 2021-02-26 | Pressure container and defect detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110218364.7A CN113008948A (en) | 2021-02-26 | 2021-02-26 | Pressure container and defect detection method thereof |
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| CN113008948A true CN113008948A (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686924A (en) * | 2021-08-24 | 2021-11-23 | 北京化工大学 | Composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process |
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| CN203672817U (en) * | 2013-12-27 | 2014-06-25 | 中国神华能源股份有限公司 | Evaporator |
| CN205535030U (en) * | 2016-03-24 | 2016-08-31 | 深圳市烯世传奇科技有限公司 | Novel pressure vessel based on graphite alkene |
| CN107521136A (en) * | 2017-08-08 | 2017-12-29 | 华东理工大学 | Filament-Winding Vessel and its manufacturing process with on-line monitoring function |
| CN111237456A (en) * | 2020-01-08 | 2020-06-05 | 沈阳斯林达安科新技术有限公司 | Intelligent composite material pressure container relating to micro-nano sensor and manufacturing method thereof |
| CN111238361A (en) * | 2020-03-13 | 2020-06-05 | 北京石墨烯技术研究院有限公司 | Graphene temperature strain sensor |
| WO2020215161A1 (en) * | 2019-04-26 | 2020-10-29 | Shawcor Ltd. | Method and apparatus for pipeline monitoring |
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2021
- 2021-02-26 CN CN202110218364.7A patent/CN113008948A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334322A (en) * | 2008-08-06 | 2008-12-31 | 中国原子能科学研究院 | Method for measuring temperature, stress-strain and vibration of high-temperature double-layer pipeline |
| CN102192859A (en) * | 2011-04-02 | 2011-09-21 | 常州大学 | Pressure container corrosion fatigue testing device with closed-loop control |
| CN203672817U (en) * | 2013-12-27 | 2014-06-25 | 中国神华能源股份有限公司 | Evaporator |
| CN205535030U (en) * | 2016-03-24 | 2016-08-31 | 深圳市烯世传奇科技有限公司 | Novel pressure vessel based on graphite alkene |
| CN107521136A (en) * | 2017-08-08 | 2017-12-29 | 华东理工大学 | Filament-Winding Vessel and its manufacturing process with on-line monitoring function |
| WO2020215161A1 (en) * | 2019-04-26 | 2020-10-29 | Shawcor Ltd. | Method and apparatus for pipeline monitoring |
| CN111237456A (en) * | 2020-01-08 | 2020-06-05 | 沈阳斯林达安科新技术有限公司 | Intelligent composite material pressure container relating to micro-nano sensor and manufacturing method thereof |
| CN111238361A (en) * | 2020-03-13 | 2020-06-05 | 北京石墨烯技术研究院有限公司 | Graphene temperature strain sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686924A (en) * | 2021-08-24 | 2021-11-23 | 北京化工大学 | Composite material high-pressure hydrogen storage bottle liner peeling failure diagnosis and early warning process |
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