2results about How to "Prevent sudden fall" patented technology

The utility model relates to a hoisting machinery field, proposed single -beam electric hoist anti -falling safety protection special device, including single -beam, the bottom of single -beam is provided with the welding seat, the top of single -beam is provided with safety protection device, safety protection device includes the car driving wheel, the side of car driving wheel is located in the side of single -beam, the side of single -beam is provided with the car driven wheel, the bottom of single -beam is provided with the suspension axle, the side of single -beam is provided with electric hoist, the top of single -beam is provided with the frame, the side of frame is fixedly connected U shape sling, one end of U shape sling is provided with the protection rope, the end away from U shape sling of protection rope is located in the side of electric hoist, the side of frame is fixedly connected with the shell, through above -mentioned technical scheme, solved the problem that single -beam electric hoist anti -falling safety protection special device in related art cannot prevent electric hoist falling.

The utility model discloses bottle valve airtightness testing machine belongs to gas cylinder bottle valve airtightness test technical field, including box and water tank assembly, water tank assembly is located the inside of box, the right side of box top is provided with right side cover door, both sides of right side cover door rear side all are provided with hinge, both sides of right side cover door rear side all are through the hinge with the movable joint of box, the bottom of right side cover door is provided with auxiliary support structure, the inside of box is provided with the pressurizing mechanism for water tank assembly pressurization, through setting up box, water tank assembly, right side cover door, hinge, auxiliary support structure and pressurizing mechanism, have solved the existing gas cylinder bottle valve testing machine only to valve carries out 1.2 nominal pressure under the external airtightness test, does not carry out 0.05MPa's low pressure external airtightness test, gas cylinder bottle valve testing machine does not carry out internal airtightness test to valve and the problem that gas cylinder bottle valve testing machine does not have gas source pressurizing device and leads to external gas source test pressure deficiency.