30results about How to "Easy to promote in industry" patented technology

A centrifugal pump comprises an impeller installed on the driving shaft. On one side of the impeller disk are disposed main vanes and on the other side of the disk are disposed secondary vanes. There is a preset distance from the starting point of the vane to the hub to form a traffic island area around the hub. A runner formed between vanes is in communication with the traffic island area with the traffic island area with spilling throughholes. The pump body has a chamber for holding vanes and the chamber has a curved channel with a water discharging tube. A liquid intake with an opening and closing mechanism is disposed in the centre of the pump head corresponding to the impeller.

The invention discloses a packing bag binding machine. The packing bag binding machine comprises a rubber band screening device, a rubber band expanding device and a packing bag conveying device; therubber band screening device comprises a vibration disc; the vibration disc comprises a hopper and a feeding rail; the feeding rail is spirally ascended, and is provided with a feeding port; a screening rail is fixed at the external of the feeding rail; the rubber band expanding device is arranged at the tail end of the screening rail for expanding rubber bands screened by the rubber band screening device; and the packing bag conveying device comprises a conveying belt mechanism or a manipulator, and is used for conveying packing bags to openings of the rubber bands expanded by the rubber bandexpanding device or clamping the packing bags by the manipulator to feed to the openings of the rubber bands expanded by the rubber band expanding device. The packing bag binding machine has the beneficial effects of automatic operation, labor liberation, no limitation from the skill proficiency degree of operators, high expansibility, simple structure and low cost.

The invention discloses a card application downloading method, a card application downloading system and a card application downloading device. The method comprises the following steps of setting an application hidden file and an application example hidden file in a card, wherein the application hidden file is used for storing application data received in a card application downloading process, and the application example hidden file is used for storing downloaded application example data; setting not less than 2 states in the card application downloading process; and judging whether power is cut off or not between the states, and if the power is cut off, clearing the application hidden file or the application example hidden file. According to the technical scheme, influence on the use of the card after the power is cut off in card application downloading and installation processes can be avoided, the utilization rate of a space in the card can be increased, and the card application downloading and installation performance can be improved.

The invention discloses a projection screen, a manufacturing method of the projection screen, and a method for controlling light rays by means of the projection screen. The projection screen comprises a back film arranged on the bottom surface, the upper surface of the back film is covered with a plurality of convex mirrors used for reflecting the light rays, a gap is reserved between side faces of every two adjacent convex mirrors, and light isolation boards used for shielding the light rays are arranged in the gaps and extend outwards in the direction perpendicular to the back film to a light-pervious film. The manufacturing method of the projection screen includes the steps that the back film, the light isolation boards and the convex mirrors are pressed by means of a roller and then are fixedly connected after being pressed. The method for controlling the light rays by means of the projection screen includes the following steps that (a) the light isolation boards are used for isolating ambient light emitted from the periphery of the projection screen, and (b) incoming projection light is reflected to the projection screen by means of the convex mirrors. The projection screen, the manufacturing method of the projection screen and the method for controlling the light rays by means of the projection screen have the advantages that the projection screen which can be used when the intensity of the ambient light is high is not limited by environment conditions; cost is low, resources are saved and industrial popularization is easy to achieve.

This invention relates to a rock drying device including a drying box and a hot air device feeding hot air to the drying box via a high-temperature insulation feeding pipeline, in which, the drying box is composed of a box with heat-preservation layer and a drawer set of column layers in the box with gaps between the drawer set and the box for gas flow passing through and gaps are remained among layers of the drawers for gas flow passing through, a hot air inlet is set at the middle of the bottom of the drawers, the hot air device is set in a frame formed by a fan driven by a blowout motor connected with a heater meeting the preset heating temperature, said heater is connected with the box by the high temperature pipeline and the box, an intake pipeline is connected with the fan.