Valve assembly

A valve assembly comprising:

• a valve housing inserted into, after removing a portion of an exhaust line of a vacuum chamber, the removed portion of the exhaust line in such a manner as to be open in a direction communicating with the exhaust line and to have a predetermined inner space in a direction perpendicular to the direction communicating with the exhaust line;
• a valve movable horizontally inside the valve housing in such a manner as to allow the valve housing to communicate with the exhaust line or to be blocked from the exhaust line;
• a valve driving part disposed on one side of the valve housing in such a manner as to be connected to the valve so as to horizontally move the valve in a direction perpendicular to the exhaust line;
• and
• valve movement guide parts disposed inside the valve housing so as to guide a moving path of the valve,
• wherein the valve housing comprises
• a housing body for providing a horizontal movement space of the valve, and
• a pair of openings open in the direction communicating with the exhaust line in a state of being coupled to the exhaust line,
• wherein the valve comprises
• an upper blade adapted to allow an upper side opening of the pair of openings to communicate with the exhaust line or to block from the exhaust line,
• a lower blade located under the upper blade in parallel with the upper blade and adapted to allow a lower side opening of the pair of openings to communicate with the exhaust line or to block from the exhaust line,
• a blade connecting member disposed between the upper blade and the lower blade to connect the upper blade and the lower blade with each other so that a distance between the upper blade and the lower blade is freely varied, and
• a plurality of protrusions protruding from the sides of the upper blade and the lower blade in such a manner as to be slidably coupled to the valve movement guide parts,
• wherein the valve driving part comprises
• a blade connector located inside the valve housing in such a manner as to be coupled to the upper blade and the lower blade, respectively,
• a power supplier located at the outside of the valve housing to supply power for horizontally moving the blade connector, and
• a connection shaft adapted to connect the power supplier with the blade connector, and
• wherein the blade connector comprises
• a connection block having a pair of long holes formed spaced apart from each other by a given distance in the same direction as the horizontal moving direction,
• a pair of sliding blocks slidably mounted on the long holes, and
• a pair of connection pins whose one end is rotatably coupled to the corresponding sliding block and whose other end is rotatably coupled to the inner surface of the upper blade or the lower blade.