3results about How to "Control aperture size" patented technology

The utility model provides a chemical fertilizer screening device with adjustable meshes, which comprises a closed frame, a plurality of groups of mutually perpendicular support strips are arranged in the frame, meshes are formed among the support strips, four spacing pieces are arranged around the inner edge of each mesh, the support strips are hollow, and the spacing pieces are arranged in the frame. The side faces of the supporting strips are provided with open grooves penetrating out of the supporting strips, the spacing pieces are rotationally arranged in the supporting strips, transmission assemblies are further arranged in the supporting strips, and the spacing pieces are matched with the transmission assemblies to conduct sector displacement in the open grooves so as to adjust the hole diameters of the meshes. The control assembly controls movement of the spacing pieces through the transmission assembly, through the mechanisms, the screening device capable of adjusting the size of the meshes is achieved, the labor cost is saved, and the screening efficiency of the chemical fertilizer is improved.

This invention discloses a feed cooling and grading sieve, relating to the field of feed cooling and grading technology. It includes a central cylinder and a sieve cylinder, the sieve cylinder rotating relative to the central cylinder, the central cylinder and the sieve cylinder being coaxially arranged, forming an annular cavity between them; an isolation ring and a spiral ring, the isolation ring being fixedly connected to the central cylinder, the spiral ring being disposed on the inner wall of the sieve cylinder and rotating with the sieve cylinder, the isolation ring dividing the annular cavity into multiple zones; a connecting component for connecting or closing adjacent zones; a venting ring and a conveying pipe, an air compressor delivering high-pressure cold air through the conveying pipe to the venting ring, the venting ring being connected to the annular cavity. The beneficial effects of this invention are that the annular cavity allows for cooling and grading of materials within it, resulting in a more compact space for the materials. The zoned material arrangement prevents hot materials entering the sieve cylinder from sharing the same temperature environment with cold materials exiting the sieve cylinder, avoiding airflow turbulence and ensuring that the materials are cooled strictly according to a temperature gradient.

This utility model discloses a fluorinated pipe umbrella-shaped rotating flange flaring device, belonging to the field of pipe flaring devices. The device includes an umbrella-shaped control mechanism, an umbrella-shaped flaring head component, an umbrella-shaped rotating mechanism, and a control cabinet. The umbrella-shaped control mechanism and the umbrella-shaped rotating mechanism are connected to the control cabinet via wiring harnesses. The umbrella-shaped control mechanism controls the opening and closing of the umbrella-shaped flaring head component, and the umbrella-shaped rotating mechanism drives the umbrella-shaped flaring head component to rotate. This utility model, through the design of the umbrella-shaped control mechanism, umbrella-shaped flaring head component, and umbrella-shaped rotating mechanism, solves the problem that existing pipe flaring devices cause thinning or cracking of the fluorinated pipe wall due to compression, leading to decreased sealing performance and increased leakage risk. It improves the finished product performance of fluorinated pipe flaring without compromising the performance of the outer wall of the fluorinated pipe.