8results about How to "Clear fast" patented technology

The invention belongs to the field of gene engineering and biological treatment, and provides a hypoxia specific gene expression cassette, gram-negative bacteria containing the expression cassette and application of the gram-negative bacteria in preparation of tumor drugs. According to the invention, the forward hypoxia promoter and the reverse hyperxia promoter are reasonably designed, and appropriate survival essential genes are matched, so that the hypoxia specific gene expression cassette which is more efficient and safer is obtained. Gram-negative bacteria modified by the hypoxia specific gene expression cassette designed by the invention are low in overall mutation rate, and in a mouse in-vivo tumor model, more bacteria are distributed in tumors and the clearing speed in normal organs is higher.

The invention provides a direct-current line fault ride-through method applied to a converter valve with an active energy discharge function and a related device, and the method comprises the steps: starting a direct-current fault ride-through strategy in response to a direct-current line fault signal; after the first direct-current fault ride-through strategy is started, energy release branches of the corresponding bridge arms are controlled to be switched according to the overall level of the capacitor voltage of the sub-modules in the bridge arms; after the second direct current fault ride-through strategy is started, a direct current bias is superposed on the reference value of the direct current controller; and waiting for a set time after the DC fault is cleared, and exiting the DC fault ride-through strategy. According to the invention, the switching of the energy release resistor is controlled according to the capacitor voltage level of the sub-module in the bridge arm, the overvoltage of the sub-module is accurately suppressed, the excessive difference of the action frequency of the energy release branch is avoided, and the uniform distribution of the released energy is ensured; meanwhile, a direct current bias is superposed on a reference value of a direct current controller at the initial stage of inputting a direct current fault ride-through strategy, so that direct current can quickly control zero crossing, and direct current fault clearing is accelerated.

The utility model relates to the technical field of industrial part production and manufacturing, and discloses a forming punching machine for industrial part manufacturing, which comprises a supporting seat and an arranged rotating table, a lower die holder is additionally arranged in the center of the top of the rotating table, and the rotating table is rotatably connected with the supporting seat; hot-air blowers are installed on the two sides of the liquid collecting concave plate, the tops of the hot-air blowers communicate with flow dividing guide pipes, air spraying heads communicate with the air outlet ends of the flow dividing guide pipes, and the air spraying heads are located on the two sides of the top of the liquid collecting concave plate; and rotating shafts are additionally arranged in the centers of the two sides of the rotating table, and the rotating shafts are coaxially connected with the first driving motor. According to the forming punching machine for industrial part manufacturing, the rotating table and the lower die base are driven to rotate through the first driving motor and the rotating shaft, residual water drops in the lower die base are dropped into the liquid collecting concave plate, the air heater sucks external air for heating, the external air is sprayed into the lower die base through the flow dividing guide pipe and the air spraying head, and therefore water in the lower die base is cleaned.

The present invention discloses a device for removing oxide scale during the stamping process of the bridge shell, comprising a frame, a stamping platform, a bridge shell stamping die, an oxide scale blowing device, and an oxide scale absorbing device. The stamping platform and the bridge shell stamping die are arranged on the frame, and the oxide scale blowing device and the oxide scale absorbing device are respectively arranged on both sides of the stamping platform. A mold cavity is arranged in the bridge shell stamping die, and an oxide scale removing hole penetrating the stamping platform and the bridge shell stamping die is arranged at the bottom of the mold cavity. A cleaning hole blocking device and an oxide scale removing component are arranged on the frame under the stamping platform. The device for removing oxide scale during the stamping process of the bridge shell of the present invention is simple and practical, has high stability, has high efficiency in removing oxide scale of the bridge shell during the stamping process, has fast speed, is thorough in removing, has good removing effect, and is easy to use.

This invention relates to the field of chemical storage technology, specifically to a leak-proof hazardous chemical storage device. It includes a tank body with an upper plate and a lower plate concentrically fixed at its upper and lower ends, respectively. Multiple elastic plates are evenly distributed around the outer circumference of the tank body between the upper and lower plates. Each elastic plate has a fixing plate fixed to both ends in the circumferential direction. A sealed cavity is formed between the elastic plates, the tank body, the upper plate, and the lower plate. A protrusion is formed in the center of each elastic plate protruding outwards from the tank body. Swing frames are respectively installed on both sides of the protrusion, and pressure rollers are rotatably mounted on the swing frames, pressing against the elastic plates. This invention uses sensors installed within the sealed cavity to monitor leakage signals in real time, achieving rapid response; a motor-driven pressure roller compresses the elastic plates, making them adhere tightly to the leak point in the tank body to form a physical barrier; combined with the arc-shaped design of the fixing strips, it ensures a seamless seal, effectively blocking the leakage path of chemicals.

The utility model discloses rapid drying equipment for residual moisture of a gas tank, which belongs to the technical field of gas tank drying equipment and comprises a drying box body, a plurality of groups of placing grooves are uniformly arranged on the drying box body, gas tanks are placed in the placing grooves, heating pipes are arranged outside the gas tanks, the heating pipes are arranged to be disc-shaped, and the heating pipes are arranged in the placing grooves. A plurality of groups of gas tanks are sequentially placed in the placing grooves, the valves are opened, the electric heating pipes are used for heating and drying, water in the gas tanks is heated and evaporated to form water vapor to escape, and the water is removed; all parts of each gas tank are heated evenly, evaporation of water in the gas tanks is accelerated, and the drying efficiency is improved.

The invention relates to the technical field of radiopharmaceuticals and medical imaging, in particular to an STING-targeted precursor compound, a nuclide marker, a preparation method and application of the STING-targeted precursor compound, a nuclide marker, a pharmaceutical composition and application of the pharmaceutical composition. The STING targeting precursor compound, the pharmaceutically acceptable form of the STING targeting precursor compound, the nuclide marker of the STING targeting precursor compound and the pharmaceutically acceptable form of the STING targeting precursor compound have excellent in-vivo biological performance, can have high specific uptake in tumors or inflammations with high expression of interferon stimulating factors STING, has a high target-to-non-target ratio, and can be used for preparing the target-to-non-target tumor marker of the STING targeting precursor compound and the nuclide marker of the STING targeting precursor compound and the pharmaceutically acceptable form of the STING targeting precursor compound and the nuclide marker of the STING targeting precursor compound. And the non-specific background is low, and unnecessary radioactive injury can be reduced by lower non-target visceral organ uptake, so that the medication safety is high.