51results about How to "Block falling" patented technology

This patent belongs to the technical field of mold making, and specifically discloses a sand box for lost foam casting, including a box body. The bottom of the box body is provided with a plurality of suction pipes arranged side by side. For the connecting pipe connected to the adjacent suction pipe, the side wall of the suction pipe is provided with a suction hole, and the outer wall of the suction pipe is provided with an elastic member, and the end of the elastic member is installed with a Block in the air suction hole; the inner wall of the air suction pipe is provided with a flexible part, one end of which is fixed on the inner wall of the air suction pipe, and a steel ball is installed on the other end; the inner wall of the air suction pipe There is also a rotating shaft connected to it in rotation, on which blades and cams for striking steel balls are arranged.

The invention discloses noodle processing equipment, comprising a shell (1), wherein a drive device (2) capable of positively and reversely rotating is arranged inside the shell (1); the shell (1) comprises a housing (11) and a stirring chamber (12); a stirring extruder (3) is arranged inside the stirring chamber (12); a tool bit component (4) which is matched with the stirring extruder (3) to process the extruded paste into noodles is clamped on the stirring chamber (12); the tool bit component (4) comprises an extrusion tube (41) containing the mixed paste; a section of extrusion tube (41) extends into the stirring chamber (12); a feeding hole (41-1) is formed above the extrusion tube (41) extending into the stirring chamber (12); a blanking plate (41-3) is arranged at the edge of the feeding hole (41-1); the bottom edge of the blanking plate (41-3) is fixed on the extrusion tube (41); the length of the blanking plate (41-3) is not smaller than the width (W) of the feeding hole (41-1).

The invention discloses a sand substance wriggling and moving collector used for measuring the number of wriggling and moving sand grains in the sand flow. The sand substance wriggling and moving collector is in a cylindrical shape, the circle center of the surface of a top cover is provided with a sand inlet hole, a dense screen is arranged above the sand inlet hole and welded to the top cover through a brazing wire, the surface of the top cover is covered with a sand substance layer, a sand collecting funnel is arranged on the lower portion inside the top cover, the sand collecting funnel is communicated with the sand inlet hole, the center of the cylinder is provided with a sand collecting barrel, the center of the sand collecting barrel is provided with a sand collecting bottle, the sand collecting bottle is communicated with the sand collecting funnel, and small sand leakage holes are formed in the sand collecting bottle at equal intervals. The top cover of the collector is coated with glue substances, the sand substances in the study area are evenly scattered to the top cover coated with the glue substances, the roughness of the top cover is consistent with the grain size of the sand substances on the surface of drift sand in the study area, the original friction coefficient of the ground and the sand substances is kept, and the accuracy of measuring the wriggling and moving amount under different wind powers can be guaranteed. The sand substance wriggling and moving collector is simple in structure, easy to install, and capable of carrying out sampling easily and being widely applied to studying and monitoring the blown sand physics, the forestry and various sand prevention and desertification control projects.

The invention relates to the field of substations, and discloses an improved substation which comprises a device casing body. The lower end of the device casing body is provided with a detachable mounting plate. Limiting blocks are arranged on the outer surfaces of both sides, which are close to the device casing body, of the outer surface of the upper end of the detachable mounting plate. Side slots corresponding to the limiting blocks are arranged on the outer surfaces of two sides of the device casing body. One side of the outer surface of the device casing body is provided with a clampingstructure. A dehumidification structure is arranged on the inner wall of the device casing body. A dustproof structure is arranged below the outer surface, which is near the clamping structure, of oneside of the device casing body. According to the improved substation, the detachable mounting plate, the limiting blocks and the side slots are arranged, so that the improved substation is easy to disassemble after being installed; by providing the clamping structure, an extracted line can be reinforced; the dehumidification structure is provided, so that the internal dehumidification effect is better; and by providing the dustproof structure, dust at a heat dissipation net is easy to collect and clean.

The invention relates to the technical field of fire extinguishment for buildings, in particular to a pressure relief well. The pressure relief well comprises a main pressure relief well body for forming a pressure relief well cavity; the main pressure relief well body comprises an indoor part arranged in the building indoor space and an outdoor part bulging out of the roof of the building from the indoor part; the indoor part comprises one or more pressure relief ports communicating with the pressure relief well cavity and the building indoor space; the outdoor part comprises an exhaust port communicating with the pressure relief well cavity and the building outdoor space; and a normally-closed smoke discharging fire damper is mounted on each pressure relief port. With the pressure relief well, the outer wall structure of the building can be complete and reliable while gas fire-extinguishment and pressure relief in a protection zone is realized, and the appearance is better. Besides, with the pressure relief well, the indoor temperature control effect by the aid of an air conditioner cannot be affected, temperature control by the aid of the air conditioner is more energy-saving and efficient, the cleanliness of the indoor environment is guaranteed, and the service life of indoor equipment or products can be prolonged.

The invention provides a rack and gear-ring protecting cover structure of a dumping vehicle, which can effectively avoid the damage of iron scraps, iron slag and other chippings to racks and gear rings. The rack and gear-ring protecting cover structure is characterized by comprising a bracket and a protecting plate, wherein the protecting plate is installed at the outer side of an arc-shaped gear ring of a dumping tank seat of the dumping vehicle through the bracket.

The invention discloses a printing bottom plate fixing device and a 3D printing workbench provided therewith. The printing bottom plate fixing device includes a base frame, a lifting platform, a first fastening mechanism and a second fastening mechanism, and the upper surface of the lifting platform is provided with a bottom plate In the installation area, the structure of the first fastening mechanism and the structure of the second fastening mechanism are left-right symmetrical, and the first fastening mechanism includes the first lever assembly, the first stopper, the first hook body, the second stopper and the third stopper block, the first lever assembly includes a first cross bar, a first hinge seat and a first elastic member. When the lifting platform rises upwards, the two hooks will move away from each other and move upwards. The printing base can be placed on the base installation area, and then the lifting platform is lowered, and the two hooks are close to each other and moving downwards, which completes the fixing of the printing base. , on the contrary, you can remove the printing bottom plate; it is simple and convenient to install or remove the printing bottom plate, saving time and effort.