Abstract: The present disclosure relates to a circuit breaker of a gas-insulated switchgear, and more particularly, to a self-blast circuit breaker of a gas-insulated switchgear, which reuses arc heat. A self-blast circuit breaker having a heat expansion chamber and a puffer chamber includes auxiliary intake valves which introduce a hot gas exhausted through an inside of an actuating rod, into the heat expansion chamber.

Abstract: A check vale for injecting fuel comprises: an integrally formed body provided with a neck-down portion having a diameter smaller than other areas on an outer surface of an upper portion of a fuel flow hole; an integrally formed spindle perpendicularly penetrating the body and provided with a neck-down portion having a diameter smaller than other areas on an outer surface of a lower portion of the fuel flow hole of the body; a spring surrounding an upper end portion of the spindle; a spring seat for fixing the spring surrounding the upper end portion of the spindle and for guiding the spindle to a perpendicular position; a coupling ring coupled to an upper end of the body for fixing the body to a prechamber; and a spacer coupled to a lower end of the body for fixing the lower end of the body that covers an outer edge of the spindle to the prechamber.

Abstract: There is provided a high speed solenoid having enhanced response characteristics. The high speed solenoid includes: a movable shaft linearly movable in an axial direction; a movable coil unit coupled to the movable shaft; and a magnetic field forming unit forming a magnetic field in a direction perpendicular with respect to that of a current flowing in the movable coil unit, wherein when a current is applied to the movable coil unit, the movable coil unit is moved by a magnetic field formed by the magnetic field forming unit to move the movable shaft. According to the high speed solenoid, the weight of a moving part is significantly reduced, and since an electrical time constant is small, a response speed of the solenoid may be enhanced.

Abstract: The magnetic contactor, according to an exemplary embodiment, includes: a moving core including a main core disposed to be movable in a length direction thereof and first and second core plates disposed at both ends of the main core, respectively; a coil provided on the circumference of the main core; a fixed core disposed around the coil to form a magnetic path; and a permanent magnet disposed between the coil and the fixed core, wherein the first core plate is disposed outside the fixed core, the second core plate is disposed inside the fixed core, and the fixed core is provided with at least one protrusion to reduce a gap between the fixed core and the first or second core plate.

Abstract: Disclosed is a filter device. The filter device includes a filter housing including an inflow port through which water flows in and an outflow port through which the water flowed in through the inflow port flows out, a plurality of filter members installed in the filter housing, an inflow unit installed in the filter housing and provided in each of both sides of each of the plurality of filter members for the water flowed in from the inflow port to be supplied to a plurality of openings respectively provided in the both sides of each of the plurality of filter members, and a backwashing unit coupled to both sides of at least one of the plurality of filter members for foreign substances filtered out by the plurality of filter members to be backwashed from the plurality of filter members. The plurality of filter members each has a hollow form to filter the water flowed in from the inflow port.

Abstract: According to an embodiment of the present disclosure, there is provided a preventive diagnostic system for a GIS that includes a plurality of data acquisition systems (DAS's), a central communication unit (CCU), and a local server. The DAS generates an ICD file representing a content of the configuration of the DAS using a logical node designed for the preventive diagnostic system for a GIS and delivers the ICD file to the CCU, and the CCU performs a network connection so as to communicate with the DAS in compliance with IEC 61850 based on a content of the ICD file delivered from the DAS. According to the embodiment of the present disclosure, by applying IEC 61850 to the preventive diagnostic system for a GIS, smooth integration with a substation automation system and an efficient operation can be achieved.

Abstract: Disclosed is a filter device. The filter device includes a filter housing including an inflow port, through which ballast water flows in, and an outflow port through which the ballast water flows out, a plurality of filter members provided in the filter housing to filter out a foreign substance included in the ballast water, and a backwashing unit coupled to at least one of the plurality of filter members to filter out the foreign substance by using a difference internal pressure and atmospheric pressure. The backwashing unit is provided for the ballast water to flow in so that when it is required for the backwashing unit to remove the foreign substance, at least one of the plurality of filter members coupled to the backwashing unit filters out the foreign substance included in the ballast water.

Abstract: The present invention relates to: an ion exchange membrane containing, in a channel, an inorganic particle, substituted with an organic compound including SO4? group; and a method for manufacturing the ion exchange membrane. The ion exchange membrane according to the present invention can provide excellent physical properties while also maintaining ion conductivity.

Abstract: Disclosed are a backwashing fluid discharge apparatus and a filter unit. The backwashing fluid discharge apparatus includes a plurality of drainage members installed so as to be located within a filter member in order to discharge backwash fluid moved to an inside of the filter member, and the drainage members have different diameters so as to form a plurality of inlet holes for introduction of the backwash fluid, and the drainage members have different lengths such that the inlet holes are located at different heights.

Abstract: Provided is a guide frame support device for a pipe welding device, the guide frame support device, which supports a guide frame provided on an outer circumferential surface of a pipe to be welded, including: a hinge bar connected to an inner circumferential surface of the guide frame; a pair of support bars which rotates around the hinge bar at a predetermined angle; hinge links, one side of each of which is hinge-connected to both ends of the hinge bar and the other side of each of which is connected to both ends of the pair of support bars; and a torsion spring provided between the pair of support bars and for providing elastic force to enable the support bars to rotate around the hinge bar at a predetermined angle.

Abstract: A drilling system includes a derrick installed on a platform of a stationary floating structure. An activity forms a borehole in a sea-bed, and carries out installation of a casing pipe assembly and a BOP assembly in the formed borehole. A BOP trolley forms the BOP assembly together with the activity, and moves while supporting the formed BOP assembly thereon. A slot is formed on a work stand of a moon pool for underwater storage of the BOP assembly so as to extend parallel with the direction of movement of the BOP trolley, and suppresses shaking of risers when the BOP assembly positioned underwater is moved by the BOP trolley and the BOP assembly is moved to an underwater storage position.

Abstract: An electronically controlled fuel injection valve can control the time to inject fuel and the amount of fuel to be injected in response to a control signal independently from the operating condition of an engine unlike a traditional mechanical fuel injection valve. The electronically controlled fuel injection valve employs a control method for fuel injection that increases the force of lifting up a cutoff needle of an injection controller by delivering high-pressure fuel to a lower pressure chamber via a control needle, thereby rapidly controlling fuel injection, has a simple structure making it easy to assemble, replace and precisely machine parts, and has a simple flow path structure which facilitates fabrication.

Abstract: Disclosed herein is a fuel injection valve for an internal combustion engine. The fuel injection valve includes a valve body (10), a nozzle (20), a valve plate (30), a main needle spindle (40), a main needle (50), a main needle spring (60), a spring plate (70), a pilot needle spring (80), a pilot needle spindle (90) and a pilot needle (100). In the present invention, both the main needle and the pilot needle are opened or only the pilot needle is opened by compressed high-pressure fuel oil or compressed air, thereby enabling main injection and pilot injection to be separately performed by the single fuel-injection valve. Furthermore, because opening of the main needle valve can be controlled by compressed air for ignition or control of an engine, only the pilot injection may be conducted even without using a separate compression apparatus or the like.

Abstract: Disclosed herein is a precombustion chamber structure for a gas engine. The precombustion chamber structure is configured to facilitate disassembly of a precombustion chamber tip, thus making maintenance, repair or inspection of the precombustion chamber easy. For this, the precombustion chamber structure includes: a body (110) having a main body (111), a water jacket (112) and a precombustion chamber tip (113); and a spark plug (120) for igniting fuel gas injected into the precombustion chamber (114) formed in the body (110). The precombustion chamber structure ignites fuel gas and supplies the ignited fuel gas into a main combustion chamber. A tool insert groove (1131) is formed in the junction between the precombustion chamber tip and the water jacket. The tool insert groove (1131) allows a tool for disassembly to be inserted into a space between the precombustion chamber tip and the water jacket.

Abstract: The present invention relates to a metal filter for purifying the exhaust gas from a ship, and a preparation method thereof. The purpose of the present invention is to provide: a metal filter for purifying the exhaust gas from a ship, capable of reducing nitrogen oxide by 85% or more at 250-300° C.; and a preparation method thereof. The metal filter for removing nitrogen oxide contained in the exhaust gas from a ship of the present invention comprises an integrated catalyst, wherein a metal substrate comprising irregularities is coated with a low temperature active catalyst in which vanadium (V), tungsten (W) and alumina sol are supported in a Ti-pillared clay (Ti-PILC) powdered support.

Abstract: Disclosed herein is a centrifugal casting machine, including: a rotating plate rotating by means of a motor; a cylindrical sleeve installed on the rotating plate and having an internal diameter corresponding to an external diameter of silicon steel plates constituting a core in the sleeve; an upper mold internally installed on the sleeve to define a first molding space into which a molten metal is introduced to mold an end ring; a lower mold internally installed on the sleeve to define a second molding space into which a molten metal is introduced to mold an end ring; a dummy shaft fitted in the center of the core and coupled to the lower mold; a cap coupled to an upper end of the dummy shaft to press the core; and a hydraulic ram coupled to the lower mold to move the lower mold up and down and coupled to the rotating plate to rotate therewith.

Abstract: Disclosed is a apparatus for generating a needle insertion path for an interventional robot, which provides a needle insertion path for intervention by inserting a needle. The apparatus includes a patient-side optical tool located on a patient for showing a position of an intervention target part among parts of the patient, a robot-side optical tool located on an interventional robot for showing a position of the interventional robot, and a needle path calculator configured to track positions of the patient-side optical tool and the robot-side optical tool to perform spatial registration on a local coordinate system of the patient-side optical tool based on the position of the patient-side optical tool with respect to a robot base coordinate system based on the position of the robot-side optical tool, and calculate a needle insertion path with respect to robot base coordinate system, based on a result of the spatial registration.

Abstract: A ship comprises: a hull; an engine for propelling the hull; a harmful substance reducing device for reducing harmful substances included in exhaust gas discharged from the engine; and a preheating device for the harmful substance reducing device, preliminarily heating the harmful substance reducing device when the hull is located at an emission control area (ECA) preliminary entry point close to an ECA in which the emission of the harmful substances is restricted. The ship comprises: the hull; the engine for propelling the hull; the harmful substance reducing device for reducing the harmful substances included in the exhaust gas discharged from the engine; and an engine output control device for controlling the output of the engine to be lowered so as to reduce the amount of the exhaust gas discharged from the engine when the hull is located in the ECA or at the ECA preliminary entry point.

Abstract: A cargo tank for an extremely low temperature substance carrier according to the present invention arranges a first cargo tank wall having a primary corrugated panel to prevent cracks caused by contraction and easily absorb impact caused by liquefied gas sloshing to prevent defects occurring in the cargo tank, forms auxiliary corrugation on each of the first, second and third cargo tank walls to prevent defects caused by contraction and more easily absorb impact caused by liquefied gas sloshing, and selectively applies the first to third cargo tank walls having different structures to respective parts of the cargo tank where different sloshing phenomena occur to improve reliability of the cargo tank.

Abstract: Disclosed is an electronic contactor including: a lower body; a magnetic force generator disposed within the lower body and magnetized by electric power transferred from outside to perform suctioning operation; a crossbar coupled to an upper portion of the magnetic force generator and provided with a movable contact to be lifted or lowered; a pair of separable upper bodies each being provided at one side thereof with a stationary contact and an auxiliary stationary contact and respectively coupled to upper opposite ends of the lower body such that the movable contact and auxiliary movable contacts are placed therein, facing ends of the upper bodies being coupled to each other inside the upper bodies so as to face each other; and a cover coupling upper ends of the upper bodies such that an upper end of the crossbar and the movable contact are exposed.