• 한국전산유체공학회:학술대회논문집
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• 2008.03b
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• pp.502-505
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• 2008

Due to continuous difficulty of human power supply, it is necessary to develop an equipment which is good to saving cost and time at a construction site. A quick pipe coupling method is the kind of mechanical joint system using split-sleeve and sealing-pad at pipe groove without welding. In hence, it provides restrained pipe joint which is simple, safe, and dependable without environmental pollutions. It is more useful scheme than the other ones. The purpose of this study is to find out the main design factors and the optimum shape of split-sleeve. The stress analyses were carried out under various shapes of pipe groove configuration, materials and internal pressures with a commercial software, ANSYS workbench which uses FEM(finite element method). Results are graphically depicted with various parameters.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.13 no.1
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• pp.76-80
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• 2004

Cushion sleeves are used in pneumatic cylinders to avoid impact force arising at the end stroke part between moving piston and cylinder cover. In this study low kinds of cushion sleeves are designed, manufactured and attached to the pneumatic cylinder to be experimented. The effects of cushion sleeves on cushion characteristics are investigated. e results are as follows; the pressure variation of cushion room with orifices are inspected to be smaller than that of cushion room without orifices. So sleeves with orifices are expected as protecting from impact and vibration of pneumatic cylinder. The object of this study is to provide data on the charactristics of pneumatic cushion sleeve in case of being used in industry.

• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.2
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• pp.190-195
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• 2003

We developed a loading sleeve for Automobile, which has the PCS and IMT-2000 frequency bands. The electric characteristics of the designed sleeve monopole has SWR<1.311 and 3.0dBi in average gain for that frequency bands. In this study, the designed sleeve monopole was installed at a roof and trunk lid of vehicle. The characteristics of designed sleeve monopole was investigated by measuring SWR, input impedance and radiation pattern. The experimental results show that the efficiency of the sleeve monopole is superior th that of domestic and foreign commercial PCS antenna.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.06a
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• pp.104-105
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• 2008

According to previous report, aged sleeves of old transmission line showed several defaulted installation patterns, which is biased or corrosive-fractured of steel sleeve installed cases. The latter case occupied almost 25 percent of investigated aged sleeves. These defects can cause serious accidents such as rapid increasing of sag or falling out of overhead conductor from sleeves. This paper studies thermal properties and tension for ACSR conductor in case of fractured steel sleeve model. The detailed results were presented in the text.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.13-14
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• 2013

Mechanical splices has been applied in nuclear power plant according to ASME(American Society of Mechanical Engineering) and ACI(American Concrete Institute) Code requirements. In particular sleeve with ferrous filler metal splices and cold roll formed parallel threaded splices have been used in domestic nuclear power plants. The objective of this study is to find out the constructability of the mechanical splices which had been used in Korea nuclear job site and to review the technical trends in the near future.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.609-612
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• 2009

VHF helical antenna with sleeve is vary effective for reduce hand effect, but usually helical antenna has a small bandwidth. It is not sufficient for receive and transmission of signals. The paper deals with the application of these helical antenna. And we propose the design of frequency switching circuit for using helical antenna with sleeve.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.163-164
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• 2019

Curtain wall is constructed in various forms and designs by forming the exterior walls of a building, and refers to non-bearing walls that divide the exterior and interior spaces of a building. Curtain walls require not only wind pressure, but also waterproof, insulation, insulation, and durability, as well as the effects of recent frequent earthquakes. Studies on the sleeve used to connect the vertical member mullions in the process of high-rise curtain walls are insufficient. In this study, sleeves connecting curtain wall mullions were developed to absorb external displacement, and the purpose of this study was to evaluate economic feasibility through comparison with existing construction methods.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.327-328
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• 2023

In this paper, the effect of change of sleeve type on fireproofing performance of through-penetration firestop system on metallic pipes was analyzed. As a result, if the material of the sleeve is high in thermal conductivity and thick, a large amount of heat is transferred to the top of the support structure.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.152-152
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• 2003

• Proceedings of the KWS Conference
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• 2000.04a
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• pp.290-291
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• 2000