The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller
Deep rock mass theory has not yet been completely established, which leads to a lack of theoretical guidance for deep resource development and poor continuity among engineering activities. The foundation of deep rock mechanics theory is to achieve the deep in situ rock fidelity coring (including the...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8873628 |
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| _version_ | 1832554985058992128 |
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| author | Guikang Liu Mingzhong Gao Zhiwen Yang Ling Chen Maoquan Fu Heping Xie |
| author_facet | Guikang Liu Mingzhong Gao Zhiwen Yang Ling Chen Maoquan Fu Heping Xie |
| author_sort | Guikang Liu |
| collection | DOAJ |
| description | Deep rock mass theory has not yet been completely established, which leads to a lack of theoretical guidance for deep resource development and poor continuity among engineering activities. The foundation of deep rock mechanics theory is to achieve the deep in situ rock fidelity coring (including the retaining of the pore pressure and temperature). To realize this, pressure-retaining coring technology is required. A self-triggered pressure-retaining controller based on magnetic control is proposed in this paper. The pressure-retaining controller realizes pressure-retaining coring in any direction by triggering the closure of the valve cover by a magnetic force, forming a magnetic seal. Fifteen combined magnetic circuit design schemes are proposed. The magnetic flux density norm distribution and magnetic force evolution law of different schemes are then quantitatively analyzed by the finite element method. The results show that a complex magnetization combination can weaken the nonlinear negative correlation between the magnetic force and distance. The optimal design of the valve seat magnetic circuit is Scheme 9, with the valve seat consisting of four shape identical tile magnets. Among the schemes, for Scheme 9, the magnetic flux density norm of the valve cover is the most concentrated. The maximum magnetic flux density norm is in the middle, and the magnetic force at 35 mm from the valve cover to the valve seat is 2.915 N. Scheme 9 satisfies the minimum condition of the mechanical model and verifies the feasibility of magnetic field triggering. This research can be used to gain a better understanding of deep Earth properties and provides technology for the improved design of deep in situ pressure-retaining coring devices. |
| format | Article |
| id | doaj-art-156a76640f96415083d1d6315bdd578e |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-156a76640f96415083d1d6315bdd578e2025-02-03T05:49:53ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88736288873628The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger ControllerGuikang Liu0Mingzhong Gao1Zhiwen Yang2Ling Chen3Maoquan Fu4Heping Xie5State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaTechnology Center, Datong Coal Mine Group Corporation Limited, Datong 037003, ChinaSchool of Mechanical Engineering, Sichuan University, Chengdu 610065, ChinaTechnology Center, Datong Coal Mine Group Corporation Limited, Datong 037003, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, ChinaDeep rock mass theory has not yet been completely established, which leads to a lack of theoretical guidance for deep resource development and poor continuity among engineering activities. The foundation of deep rock mechanics theory is to achieve the deep in situ rock fidelity coring (including the retaining of the pore pressure and temperature). To realize this, pressure-retaining coring technology is required. A self-triggered pressure-retaining controller based on magnetic control is proposed in this paper. The pressure-retaining controller realizes pressure-retaining coring in any direction by triggering the closure of the valve cover by a magnetic force, forming a magnetic seal. Fifteen combined magnetic circuit design schemes are proposed. The magnetic flux density norm distribution and magnetic force evolution law of different schemes are then quantitatively analyzed by the finite element method. The results show that a complex magnetization combination can weaken the nonlinear negative correlation between the magnetic force and distance. The optimal design of the valve seat magnetic circuit is Scheme 9, with the valve seat consisting of four shape identical tile magnets. Among the schemes, for Scheme 9, the magnetic flux density norm of the valve cover is the most concentrated. The maximum magnetic flux density norm is in the middle, and the magnetic force at 35 mm from the valve cover to the valve seat is 2.915 N. Scheme 9 satisfies the minimum condition of the mechanical model and verifies the feasibility of magnetic field triggering. This research can be used to gain a better understanding of deep Earth properties and provides technology for the improved design of deep in situ pressure-retaining coring devices.http://dx.doi.org/10.1155/2020/8873628 |
| spellingShingle | Guikang Liu Mingzhong Gao Zhiwen Yang Ling Chen Maoquan Fu Heping Xie The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller Advances in Civil Engineering |
| title | The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller |
| title_full | The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller |
| title_fullStr | The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller |
| title_full_unstemmed | The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller |
| title_short | The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller |
| title_sort | innovative design of deep in situ pressure retained coring based on magnetic field trigger controller |
| url | http://dx.doi.org/10.1155/2020/8873628 |
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