2results about How to "Stressful" patented technology

The utility model discloses a safety protection device for coal mine construction, which belongs to the field of coal mine safety protection and comprises two bases which are oppositely arranged, hydraulic supports are fixedly mounted at the front ends and the rear ends of the bases, a group of lifting frames which are oppositely arranged are mounted on the hydraulic supports, and supporting mechanisms which are used for adapting to mine tunnels with different widths and heights are arranged on the lifting frames. The supporting mechanism comprises two arc-shaped frames which are symmetrically arranged. The device has the beneficial effects that the supporting mechanism, the pressure bearing mechanism and the pressure measuring mechanism are arranged, the device can adapt to mine tunnels with different heights and widths for supporting through arrangement of a lifting frame and a connecting shaft, meanwhile, the top of the mine tunnel can be evenly supported in cooperation with a top plate and multiple sets of arc-shaped plates, and the situation that local stress of the mine tunnel and the device is too large is prevented; the overall supporting effect is optimized, the supporting force of the device on the top of the mine tunnel can be measured through the pressure gauge on the first water tank, safety is improved, and the safety protection performance of the coal mine construction device is improved.

The application discloses a kind of on-orbit deployment devices of CubeSat, belong to aerospace technology field.The device includes: main frame assembly, hatch, hatch unlocking mechanism, push plate assembly, lateral compression assembly and hatch compression assembly, the main frame assembly shell is square semi-enclosed body, the hatch is rotatably connected on shell by hatch unfolding locking assembly and can form closed body with shell;The hatch unlocking mechanism is installed in the left frame outside;The push plate assembly is arranged in the shell inside and is connected on the bottom plate, for pushing out CubeSat;The lateral compression assembly is arranged in the shell inside right upper corner guide rail support frame, for lateral compression CubeSat;The hatch compression assembly is fixedly installed in the inside of hatch, for CubeSat in the direction perpendicular to bottom plate is compressed.The device has high reliability, low separation angular velocity, ultra-high vacuum environment unlocking and has satellite lateral compression and the like characteristics.