Abstract:
PURPOSE: A surface treatment apparatus is provided to almost exclude environmental contamination with preventing the generation of dust in a surface treatment and to conveniently utilize the apparatus with a simple structure and a light weight. CONSTITUTION: A surface treatment apparatus comprises a decompressing container, an absorbing seal, a negative pressure generating unit, a spraying unit, and an inertial moving unit. The decompressing container has an opened side facing the structure plate of a steel product. An absorbing seal is mounted at the opened periphery of the side of the decompressing container. The negative pressure generating unit extracts a fluid using a region surrounded by the decompressing container, the absorbing seal, and the structure plate. A cover plate (81) has a portion cut into a U-shaped, and the portion covers the opened portion of the absorbing seal.
Abstract:
PURPOSE: A surface processing device is provided to prevent an environmental contamination by removing foreign substances such as rust or old paint film and by absorbing and collecting the removed foreign substances. CONSTITUTION: A surface processing device comprises four ball joints(A1,A2) mounted on four corners of a supporting member and four ball joints(B1,B2) mounted on the four corners of the supporting member which is far from an object surface(01). The ball joints are individually connected to a link rod(31), and each link rod are arranged in parallel. A plurality of actuators is arranged in order to change the distance of a surface in which the ball joints are arranged. The ball joint supports a nozzle(61) injecting a surface processing material such as fuel ash with a support member.
Abstract:
PURPOSE: A repairing and waterproofing method for a bridge is provided to prevent a repaired material from being separated from a concrete bridge even if the repair material is attached on a wet part of the concrete bridge. CONSTITUTION: A repairing and waterproofing method for a bridge is as follows. The deteriorated part of a bridge deck is removed. A reinforcing agent, containing sodium silicate and acrylate, is spread on the surface of the surface of the bridge deck where the deteriorated part is removed. Ultra rapid hardening polymer concrete is placed on the spread reinforcing agent. A waterproofing agent is spread on the placed ultra rapid hardening polymer concrete. Asphalt concrete is placed on the spread waterproofing agent.
Abstract:
PURPOSE: A bridge bearing system of a bridge is provided to prevent damage to a pier or the bridge bearing system by minimizing the excessive movement of a bearing. CONSTITUTION: A bridge bearing system of a bridge comprises a main body(100), fixing units(120), a spherical bearing(200), an elastic member(300), an upper plate(400), and a main body fixing block(500). A bearing mounting groove(110) is formed on the top surface of the main body. The fixing units are formed in the bottom of the main body and are fixed to the top end of a pier or a coping. The spherical bearing is installed in the bearing mounting groove. The elastic member is installed on the top of the spherical bearing. The upper plate is installed on the top of the elastic member. The main body fixing block is installed in the main body to support the upper plate.
Abstract:
PURPOSE: A bridge bearing system of a railroad bridge and a repairing method of a railroad bridge using the same are provided to stably resist the horizontal shock of a railroad girder using a shock absorbing unit. CONSTITUTION: A bridge bearing system of a railroad bridge comprises a main body(100), fixing units(110), a shock absorbing unit(200), an upper plate(300), a soleplate(400), and side fixing blocks(410). The fixing units are formed in the bottom of the main body and are fixed to the top ends of a pier or a coping. The shock absorbing unit is detachably installed in the top of the main body. The upper plate is detachably installed in the top of the shock absorbing. The soleplate is integrally installed on the top of the upper plate. A railway girder(2) is installed on the top of the soleplate. The side fixing blocks are coupled to both sides of the soleplate to support both sides of the railway girder.
Abstract:
PURPOSE: A method for preparing a silicate-acrylic copolymer is provided to improve properties such as compressive strength, flexural strength, and abrasion resistance of a quick-drying polymer modified concrete. CONSTITUTION: A method for preparing a silicate-acrylic copolymer includes the steps of: heating tetraethoxysilane; mixing, based on 45~55 weight% tetraethoxysilane, 22~28 weight% 2-propenoic acid, 15~24 weight% n-butyl acrylate, 1~10 weight% glycol methacrylate, 0.1~1 weight% dodecylmercaptan, and 0.1~1 weight% azobisisobutyronitrile to prepare a first mixture; cooling the first mixture; mixing 45~55 weight% first mixture, 10~20 weight% tetraethoxysilane, 15~25 weight% n-octyltriethoxysilane, 5~15 weight% siloxane and 1~10 weight% polyoxyethylene to prepare a second mixture; heating the second mixture; cooling the second mixture to room temperature.
Abstract:
본 발명은 샌드 블라스트 비산방지 장치에 관한 것으로, 피가공물에 연마재를 충돌시켜서 연마 가공을 수행하면서 상기 연마재를 회수함과 동시에 상기 연마재가 비산함을 방지할 수 있도록 상기 피가공물의 주연부에 설치되는 샌드 블라스트 비산방지 장치로서, 연마 가공 공간을 형성할 수 있도록 복수의 프레임이 상호 연결되며 상기 피가공물의 표면이 상기 연마 가공 공간의 내부로 노출되도록 일측에 노출면을 구비한 프레임부와; 상기 프레임부의 일측에 구비되어 상기 프레임부의 일측면을 폐쇄시키는 제1플레이트와; 상기 프레임부의 타측에 구비되어 상기 프레임부의 타측면을 폐쇄시키는 제2면 플레이트와; 상기 프레임부와, 상기 제1플레이트 및 상기 제2플레이트 중 어느 하나에 연통되어 상기 연마재를 회수하는 회수관과; 상기 노출면과 상기 제1플레이트 및 제2플레이트를 제외한 상기 프레임부의 둘레면을 감싸도록 상기 프레임부에 부착되어 상기 연마 가공 공간을 형성하는 커버부재를; 포함함으로써, 피가공물의 표면으로부터 연마재 분사구 사이의 거리를 충분히 확보함으로써 연마 효율을 향상시킴과 동시에 피가공물을 연마 가공하면서 연마재가 비산되지 않도록 하여 연마재를 완전하게 회수할 수 있도록 함으로써 작업 환경의 오염을 방지할 수 있다.
Abstract:
The present invention relates to an earthquake resistance reinforcement structure for a crane and, more specifically, to an earthquake resistant reinforcement structure for a crane which is installed between a wheel support plate on which crane wheels are installed and a crane support plate in order to support a crane which is installed in a port and unloads luggage. The earthquake resistance reinforcement structure for a crane comprises: a lower plate which is mounted on the top of the wheel support plate; an upper plate which supports the crane support plate by coming into contact with the bottom of the crane support plate, and is placed on the opposite side of the lower plate; and an attenuation unit which is installed between the lower and upper plates and attenuates tensile force due to the movement of the crane when an earthquake occurs. As a result, an earthquake resistant structure is included in a fixed or mobile crane to which an earthquake resistance design is not applied, and when an earthquake occurs, the kinetic energy of the ground is not transferred to the crane, therefore, the crane can be reinforced in order to prevent secondary damage.