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173results about How to "Increase height difference" patented technology

Sand and stone separator

InactiveCN111589686AAccelerate the effectGood dispersionSievingScreeningCement pasteSupport plane
The invention relates to a sand and stone separator. The sand and stone separator comprises a shell, a roller rotationally connected to the shell and provided with an opening in one end, a first driving assembly for driving the roller to rotate and a sealing plate fixedly connected to the shell and rotationally connected to the end, provided with the opening, of the roller, the sealing plate is provided with a feeding hopper and a stone discharging hopper located below the feeding hopper, first screening holes for only allowing sand to pass through are formed in the side wall of the roller, spiral material pushing blades are arranged on the inner side wall of the roller, the shell is provided with a flow guide groove located below the roller, a sand dewatering mechanism located below the flow guide groove and a paste water collecting groove located below the sand dewatering mechanism, the sand dewatering mechanism comprises supporting frames located on the two sides of the paste watercollecting groove correspondingly, sliding pieces connected to the supporting frames in a sliding mode in the horizontal direction, screening grooves formed in the sliding pieces and second driving assemblies for driving the sliding pieces to move back and forth, and second screening holes for only allowing cement paste water to pass through are formed in the screening grooves. The sand and stoneseparator has the effect of increasing the separation rate of the sand, the stone and the cement paste water.
Owner:杭州金鼎实业有限公司

U-shaped anti-clogging sewer pipe

The invention discloses a U-shaped anti-clogging sewer pipe. The U-shaped anti-clogging sewer pipe comprises a U-shaped pipe, wherein water inlet pipes and a water outlet pipe are connected to two ends of the U-shaped pipe through connectors; the water inlet pipes are of inverted Y-shaped structures, and the number of the water inlet pipes is two; one water inlet pipe is directly connected with the U-shaped pipe, and the other water inlet pipe is fixedly connected with the water inlet pipe; a permeating hole is etched in the bottom of the inclined water inlet pipe; an elbow is arranged on the permeating hole; a back flushing water tank is connected to the tail end of the elbow; a water outlet is formed in the side face of the bottom of the back flushing water tank; a floating rod type piston is arranged inside the back flushing water tank; switching of the water outlet is controlled by the floating rod type piston; besides, the water outlet is connected with the bottom of the U-shaped pipe through an inclined pipe. For the whole device, back flushing on the bottom of the U-shaped pipe is performed by adopting a full-automatic matching structure, thereby preventing U-shaped pipe clogging due to sundry stacking, and improving the sewage discharging capacity; the U-shaped anti-clogging sewer pipe is particularly suitable for a small-caliber U-shaped pipe and sewer pipes with small single-pass water flow.
Owner:WUHU HUIYU TRADING CO LTD

Concrete vibrating leveling device

The invention relates to a concrete vibrating leveling device which comprises a spliced rail. A sliding plate is arranged on the spliced rail, the lower end face of the sliding plate is provided with at least two rollers correspondingly clamped to the spliced rail, the upper end face of the sliding plate is fixedly provided with a positioning lifting frame, the positioning lifting frame comprises a guide rod and a lead screw, the upper end of the guide rod and the upper end of the lead screw are each fixedly provided with an upper end cap, the upper end caps are fixedly provided with a first motor, a shaft of the first motor is connected with the lead screw, the guide rod is provided with a left sliding sleeve, the lead screw is provided with a right sliding sleeve, a cam box is arranged in front of the left sliding sleeve and the right sliding sleeve, a second motor is fixed to the cam box, a shaft of the second motor is connected with transverse rods transversely arranged in the cam box, the transverse rods correspond to through holes and are each sleeved with an ejector rod cam, and vibration bars are arranged in the through holes in a penetrating mode. According to the device, concrete is tamped through the vibration bars by means of the ejector rod cams fixed to the transverse rods, tamping efficiency of the vibration bars is improved, and the aim that vibration and tamping of the vibration bars are carried out at the same is achieved.
Owner:NANJING DENGYU MACHINERY EQUIP MFG CO LTD

Fabrication method for printed circuit board with golden finger coated with gold on four surfaces

InactiveCN105704946AImprove height differenceImprove bite erosion normal linesPrinted element electric connection formationEtchingPrinted circuit board
The invention discloses a fabrication method for a printed circuit board with a golden finger coated with gold on four surfaces. The fabrication method comprises the following steps of 1) fabricating a primary outer-layer circuit pattern, and fabricating all circuit patterns containing golden finger lines; 2) carrying out first etching after pattern electroplating; 3) carrying out first solder welding, and partially windowing the golden finger lines; 4) fabricating a secondary outer-layer circuit pattern, covering a dry film except a golden finger region, and electroplating nickel and gold on the golden finger region; 5) carrying out third outer-layer circuit pattern after the dry film is removed; and 6) carrying out second etching, removing the covered film and then carrying out second solder welding. With the adoption of the two-time solder welding process, the height difference existing between a copper surface and a substrate is improved, the problems of nickel permeation caused by unfirm dry film coverage after the fabrication of the primary outer-layer circuit pattern and the secondary outer-layer circuit pattern and copper leakage of the golden finger caused by medicine liquid hidden under the dry film to affect the performance of the circuit board are solved, and the problem that a normal circuit is corroded due to excessive medicine liquid etched during lead etching is further improved.
Owner:SHENZHEN SUNTAK MULTILAYER PCB
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