Testing apparatus for off-load and on-load unhooking simulation of the release device of a closed lifeboat

A testing apparatus for off-load and on-load unhooking simulation of the release device of a closed lifeboat comprising two main mechanisms, each said main mechanism provided with a housing, said housing having one end disposed with a hook base, said hook base bored with a hook hole, said housing formed with a sliding groove in an interior, said housing having two sidewalls oppositely provided with a plurality of displacement indicating holes, said main mechanism having two sides respectively formed with a first notch and a second notch, said housing having one wall bored with a through hole, said first notch and said second notch at two sides of said main mechanism having their upper portions and lower portions respectively formed with a fixed base (a D fixed base, a C fixed base, a B fixed base, an A fixed base), said D fixed base, said C fixed base, said B fixed base and said A fixed base respectively bored with a cross insert groove, said D fixed base having a wall bored with a fixing insert hole communicating with said cross insert groove of said D fixed base, said fixing insert hole having a fixing piece set therein, said C fixed base having two mutually perpendicular walls respectively disposed with a pin hole communicating with said cross insert groove, said C fixed base having one of two mutually perpendicular pin holes inserted therein with a secondary lifting anchor pin, said A fixed base having two mutually perpendicular walls respectively bored with a pin hole communicating with said cross insert groove of said A fixed base, said A fixed base having one of two mutually perpendicular pin holes inserted therein with a primary lifting anchor pin;

• two hydraulic jacks respectively installed in said housings of said two mechanisms, each said hydraulic jack having a plunger set thereon with a sliding carriage, said sliding carriage positioned in said sliding groove of said housing, said sliding carriage having an upper edge provided with a mark, said mark corresponding with said displacement indicating hole on a wall of said housing, said sliding carriage pivotally installed with a wheel in an interior, said hydraulic jack having an oil pipe connector extending out of said through hole of said housing, said hydraulic jack secured in said housing by a jack-fixing seat;
• two suspension ring bases respectively connected with said main mechanisms by a chain, each said suspension ring base pivotally provided thereon with a wheel, said suspension ring base formed with a hook hole, said chain having one end set to be a fixed end, said fixed end of said chain secured in said cross insert groove of said D fixed base by a fixing member of said main mechanism, said chain passing around said wheel in said suspension ring base and orderly inserted through said cross insert groove of said C fixed base in said main mechanism and through said first notch of said main mechanism, said chain continuously inserted through said cross groove of said B fixed base and passing around said wheel in said sliding carriage and then inserted through said cross groove of said A fixed base, said chain having another end extending out of said second notch at another said of said main mechanism, said another end of said chain provided with a hoop;
• a pressure distribution module disposed with two hydraulic oil pipes, said two hydraulic oil pipes respectively connected with said oil pipe connectors of said hydraulic jacks in said main mechanisms, said pressure distribution module having one side provided with a transfer valve;
• a manual hydraulic pump connected with said pressure distribution module, and
• an air pressure buffer connected with said transfer valve at one side of said pressure distribution module.