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公开(公告)号：US20230052897A1
公开(公告)日：2023-02-16
申请号：US16497653
申请日：2019-09-20
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Song Yop HAN , Jeong Woo LEE , Kwang Ho LEE
IPC: G01R31/52 , G01R19/165
Abstract: The present invention relates to resistive leakage current in a surge arrester that measures not voltage but leakage current alone in the surge arrester to obtain a resistive leakage current included in the leakage current so as to compensate for shortcomings in conventional metal-oxide surge arresters. The present invention performs a reference point detecting step (S20) to select a reference point by performing pattern analysis based on a characteristic pattern shown in a total leakage current (IT) when an applied voltage is 0V, a resistive leakage current calculating step (S30) to calculate a resistive leakage current by Fourier series-expanding the total leakage current (IT) starting at the reference point, and reference point verifying/correcting steps (S40 and S41) to correct the reference point until a characteristic pattern of the resistive leakage current (IR) according to non-linear resistance characteristics of the surge arrester (1) is shown so that the resistive leakage current (IR) is recalculated, and the present invention determines that the resistive leakage current (IR) calculated based on the completely corrected reference point is the resistive leakage current of the surge arrester (1).
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公开(公告)号：US20220220970A1
公开(公告)日：2022-07-14
申请号：US17302075
申请日：2021-04-22
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Sang Hyun OH
IPC: F04D29/24
Abstract: A variable impeller for a pump is proposed. The variable impeller includes a hub to which a shaft is mounted, a plurality of vanes radially arranged around the hub outward from the hub, and extension wings tightly locked to the plurality of vanes and extending length of each of the vanes. The length of the vane is adjusted in response to the pumping head that is changed by a flow rate of fluid, the pump is operated within a high efficiency section, an expensive impeller rotation speed control device is not required, and energy is reduced by reducing power consumption of the pump. In addition, during the work of changing the pumping head, the replacement of the extension wings may be quickly completed while only a part of a pump housing is opened to expose only the impeller without separating the entire assembly of the impeller from the pump.
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公开(公告)号：US20190242791A1
公开(公告)日：2019-08-08
申请号：US16331639
申请日：2017-09-29
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Kwang Myung KO , Ki Chul JANG , Kwan Ju YANG , Seung Jae LEE
CPC classification number: G01N1/10 , G01N1/14 , G01N33/18 , G01N33/1826 , G01N2001/1445
Abstract: The present invention relates to a press-type water sampling device, and to a press-type water sampling device comprising: a water sampling bottle having opened upper and lower parts; and a bumper support, which has a top cap and a bottom cap for blocking the opened upper and lower parts of the water sampling bottle, is formed into a frame having a shape that encompasses the water sampling bottle, and enables the water sampling bottle to be vertically moveable. The present invention enables the water sampling bottle to be separated from the bumper support so as to prevent breakage and water leakage of the water sampling bottle and facilitate cleaning of the water sampling bottle, smoothly collects water at the upper and lower parts of the water sampling bottle since the water sampling bottle is formed at predetermined gaps from the top cap and the bottom cap at the center portion of the bumper support, and can improve accuracy and reliability of a sample water analysis since the water sampling device is formed in an integrated sliding structure, in which the top cap fixed to the bumper support moves down by a messenger moving down when the water sampling device reaches a water depth of a target location and the water sampling bottle is sealed by the top cap and the bottom cap.
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公开(公告)号：US20170328828A1
公开(公告)日：2017-11-16
申请号：US15533927
申请日：2015-12-07
Inventor： Seong Ho GOH , Hee Seok JEON , Byoung Jig KIM , Sung Su KIM , Min Su KIM
IPC: G01N17/02 , C23F13/12 , C23F13/10 , G01R19/165 , C23F13/22
CPC classification number: G01N17/02 , C23F13/10 , C23F13/12 , C23F13/22 , C23F2213/32 , G01R19/165
Abstract: The present invention relates to an electric anticorrosive potential measurement electrode unit for measuring an anticorrosive potential of an anticorrosive object (30) buried underground, and comprises: a first electrode unit (10) buried underground near the anticorrosive object (30); and a second electrode unit (20) buried so as to be separated by a distance (D) from the first electrode unit (10) and measuring a comparative potential relative to the first electrode unit (10).
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公开(公告)号：US09650721B2
公开(公告)日：2017-05-16
申请号：US14362577
申请日：2012-11-28
Applicant: TECHWIN CO., LTD. , KOREA WATER RESOURCES CORPORATION
Inventor： Boong Ik Jung , Jung Sik Kim , Hyun Su Shin , Sang Seek Bae , Kyong Lee , Young Jae Lee
CPC classification number: C25B9/10 , C02F1/4674 , C02F1/4693 , C02F2201/46115 , C25B1/26 , C25B15/08
Abstract: The present invention relates to a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products, which is a chlorine disinfection device for on-site generation and produces sodium hypochlorite solution by electrolyzing sodium chloride aqueous solution on site, thereby requiring no additional liquefied chlorine storage equipment or disaster prevention equipment and securing flexibility of installation and operation while not being regulated by a high-pressure gas safety control act.The highly efficient sodium hypochlorite generation apparatus of the present invention capable of decreasing disinfection by-products comprises: a diaphragm electrolytic bath comprising an anode room into which a sodium chloride aqueous solution flows, a cathode room into which water flows, and a cation exchange membrane for dividing the anode room and the cathode room; an anode water storage tank for storing chlorine gas and anode water generated by the electrolysis of the anode room; a cathode water storage tank for storing sodium hydroxide generated by the electrolysis of the cathode room and discharging hydrogen gas; and a gas/liquid contact portion in which the chlorine gas supplied from the anode water storage tank reacts with the sodium hydroxide generated at the cathode water storage tank to produce sodium hypochlorite, wherein the sodium hypochlorite generation apparatus further comprises a water-splitting electrodialysis tank for producing hydrochloric acid and sodium hydroxide using a sodium chloride aqueous solution and water to supply the same as anode water and cathode water, respectively.The present invention can provide a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products which can minimize the generation of chlorate ions (ClO3−), by-products, by increasing the chlorine generation efficiency of an anode and adjusting a material balance in case of gas/liquid contact. In addition, since it is possible to provide chemicals generated using salt only to a diaphragm sodium hypochlorite generation apparatus, a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products with excellent safety and economic efficiency can be provided without using expensive chemicals that are difficult to handle.
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Patent Agency Ranking
公开(公告)号：US09645284B2
公开(公告)日：2017-05-09
申请号：US14356003
申请日：2012-11-12
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Ik Sang Shin , Dong Seon Kim , Kyung Woo Lee
CPC classification number: G01W1/14
Abstract: Disclosed is a precipitation gauge including a precipitation receiving member having a water collecting part provided in a shape of a funnel at a lower portion of a cylindrical body and a drain tube, a photodetector installed on an inner sidewall of the cylindrical body to detect snow collected in the precipitation receiving member, heating parts installed on a bottom surface of the water collecting part and a wall of the drain tube to receive a snow signal detected by the photodetector for operation of the heating parts, a rotatable fluid supply unit coupled on a connection tube coupled with the drain tube of the precipitation receiving member perpendicularly to the drain tube, and a flow rate measuring unit provided in a discharge tube coupled with the connection tube provided at a lower portion of the rotatable fluid supply unit to measure a flow rate.
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7.发明申请公开(公告)号：US20160051940A1
公开(公告)日：2016-02-25
申请号：US14783299
申请日：2014-03-31
Applicant: KOREA WATER RESOURCES CORPORATION , IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY , INDUSTRY- ACADEMIC COOPERATION FOUNDATION OF KYUNGNAM UNIVERSITY
Inventor： Ho Bum PARK , Hyo Won KIM , Hee Dae LEE , Sang-Seek BAE , Seung Hyun KIM , Geung Jeon HAN , Sang Cheol LEE
CPC classification number: B01D69/148 , B01D61/025 , B01D67/0006 , B01D69/125 , B01D71/021 , B01D71/56 , B01D71/60 , B01D2323/40 , B82Y30/00 , C01B2202/34 , C01B2202/36 , C02F1/441 , C02F2103/08 , C02F2305/08 , Y02A20/131
Abstract: Provided is a separation membrane for seawater desalination and a method for manufacturing the same, and more particularly, a separation membrane for seawater desalination with excellent water permeability and salt rejection and a method for manufacturing the same. If the separation membrane for seawater desalination and the method for manufacturing the same according to the present disclosure are applied, it is possible to provide a separation membrane for seawater desalination with excellent water permeability and salt rejection. Therefore, it is possible to provide a separation membrane for seawater desalination with improved performance in comparison to an existing separation membrane for seawater desalination. As a result, water resources may be widely utilized.
Abstract translation: 本发明提供一种用于海水淡化的分离膜及其制造方法，更具体地，涉及具有优异的透水性和耐盐析性的海水淡化用隔膜及其制造方法。 如果应用根据本公开的海水淡化用分离膜及其制造方法，则可以提供具有优异的透水性和耐盐析性的用于海水淡化的分离膜。 因此，与用于海水淡化的现有分离膜相比，可以提供用于海水淡化的分离膜，其性能提高。 因此，水资源可能得到广泛的利用。
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公开(公告)号：US20140290353A1
公开(公告)日：2014-10-02
申请号：US14356003
申请日：2012-11-12
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Ik Sang Shin , Dong Seon Kim , Kyung Woo Lee
IPC: G01W1/14
CPC classification number: G01W1/14
Abstract: Disclosed is a precipitation gauge including a precipitation receiving member having a water collecting part provided in a shape of a funnel at a lower portion of a cylindrical body and a drain tube, a photodetector installed on an inner sidewall of the cylindrical body to detect snow collected in the precipitation receiving member, heating parts installed on a bottom surface of the water collecting part and a wall of the drain tube to receive a snow signal detected by the photodetector for operation of the heating parts, a rotatable fluid supply unit coupled on a connection tube coupled with the drain tube of the precipitation receiving member perpendicularly to the drain tube, and a flow rate measuring unit provided in a discharge tube coupled with the connection tube provided at a lower portion of the rotatable fluid supply unit to measure a flow rate.
Abstract translation: 公开了一种沉淀量计，其包括沉淀物接收构件，该沉淀物接收构件具有在筒体的下部设置为漏斗状的集水部和排水管，安装在圆筒体的内侧壁上的光电检测器，用于检测积雪 在沉淀物接收构件中，安装在集水部的底面上的加热部和排水管的壁接收由光检测器检测到的用于加热部的运转的雪信号，可旋转的流体供给单元， 管与垂直于排水管的沉淀物接收构件的排水管联接，以及流量测量单元，设置在与设置在可旋转流体供应单元的下部处的连接管联接的排放管中，以测量流量。
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公开(公告)号：US11726144B2
公开(公告)日：2023-08-15
申请号：US16497653
申请日：2019-09-20
Applicant: KOREA WATER RESOURCES CORPORATION
Inventor： Song Yop Han , Jeong Woo Lee , Kwang Ho Lee
IPC: G01R31/52 , G01R19/165 , H02H9/04
CPC classification number: G01R31/52 , G01R19/16571 , H02H9/04
Abstract: The present invention performs a reference point detecting step (S20) to select a reference point by performing pattern analysis based on a characteristic pattern shown in a total leakage current (IT) when an applied voltage is 0V, a resistive leakage current calculating step (S30) to calculate a resistive leakage current by Fourier series-expanding the total leakage current (IT) starting at the reference point, and reference point verifying/correcting steps (S40 and S41) to correct the reference point until a characteristic pattern of the resistive leakage current (IR) according to non-linear resistance characteristics of the surge arrester (1) is shown so that the resistive leakage current (IR) is recalculated, and the present invention determines that the resistive leakage current (IR) calculated based on the completely corrected reference point is the resistive leakage current of the surge arrester (1).
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10.发明申请公开(公告)号：US20140311897A1
公开(公告)日：2014-10-23
申请号：US14362577
申请日：2012-11-28
Applicant: TECHWIN CO., LTD. , KOREA WATER RESOURCES CORPORATION
Inventor： Boong Ik Jung , Jung Sik Kim , Hyun Su Shin , Sang Seek Bae , Kyung Lee , Young Jae Lee
CPC classification number: C25B9/10 , C02F1/4674 , C02F1/4693 , C02F2201/46115 , C25B1/26 , C25B15/08
Abstract: The present invention relates to a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products, which is a chlorine disinfection device for on-site generation and produces sodium hypochlorite solution by electrolyzing sodium chloride aqueous solution on site, thereby requiring no additional liquefied chlorine storage equipment or disaster prevention equipment and securing flexibility of installation and operation while not being regulated by a high-pressure gas safety control act.The highly efficient sodium hypochlorite generation apparatus of the present invention capable of decreasing disinfection by-products comprises: a diaphragm electrolytic bath comprising an anode room into which a sodium chloride aqueous solution flows, a cathode room into which water flows, and a cation exchange membrane for dividing the anode room and the cathode room; an anode water storage tank for storing chlorine gas and anode water generated by the electrolysis of the anode room; a cathode water storage tank for storing sodium hydroxide generated by the electrolysis of the cathode room and discharging hydrogen gas; and a gas/liquid contact portion in which the chlorine gas supplied from the anode water storage tank reacts with the sodium hydroxide generated at the cathode water storage tank to produce sodium hypochlorite, wherein the sodium hypochlorite generation apparatus further comprises a water-splitting electrodialysis tank for producing hydrochloric acid and sodium hydroxide using a sodium chloride aqueous solution and water to supply the same as anode water and cathode water, respectively.The present invention can provide a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products which can minimize the generation of chlorate ions (ClO3−), by-products, by increasing the chlorine generation efficiency of an anode and adjusting a material balance in case of gas/liquid contact. In addition, since it is possible to provide chemicals generated using salt only to a diaphragm sodium hypochlorite generation apparatus, a highly efficient sodium hypochlorite generation apparatus capable of decreasing disinfection by-products with excellent safety and economic efficiency can be provided without using expensive chemicals that are difficult to handle.
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