6results about How to "Avoid prolonged contact" patented technology

The utility model provides a movable SNCR denitration spray gun which comprises a gun barrel and a gun body communicated with the gun barrel, a plurality of fixing frames are arranged on the gun barrel, a sliding hole connected with the gun barrel in a sliding mode is formed in the middle of each fixing frame, a mounting plate is arranged in front of the spraying end of the gun barrel, and the gun body is connected with the gun barrel in a sliding mode. A spray gun hole in sliding connection with the gun barrel is formed in the position, corresponding to the spraying end of the gun barrel, of the mounting plate, a cover plate used for sealing the spray gun hole is hinged to the interior of the spray gun hole, a connecting piece is movably mounted at the end, close to the gun barrel, of the cover plate, and the other end of the connecting piece is movably mounted on the gun barrel. Due to the arrangement of the mounting plate, the cover plate, the spray gun hole and the connecting piece, long-time contact between highly corrosive substances and the gun barrel and the gun body is avoided, damage to the gun barrel and the gun body is reduced, and therefore the replacement frequency of the gun barrel and the gun body is reduced.

The utility model relates to traditional Chinese medicine technical field, concretely for a kind of packing plant for traditional Chinese medicine ration, including case, control component, slicing component, feeding assembly, stirring component, output component, packaging component and transmission component;Stirring component is communicated with output component, slicing component and feeding assembly are oppositely arranged stirring component, and packaging component is located at the one end of output component;Stirring component is used for the medicine stirring of slicing component and feeding assembly to be rationed output through control component and output component;Traditional Chinese medicine processing link can be accurately controlled by control component, ensure accuracy, and the quantitative output of medicinal material is realized by the synergic work of control component and output component, the ingenious connection of slicing component and feeding assembly and stirring component makes that medicinal material can be rapidly, uniformly stirred and mixed, improves the consistency of traditional Chinese medicine component, ensures drug quality, and the freshness and medicinal efficacy of medicinal material are maintained by packaging component after rationing, and it is strong in practicality.

This utility model relates to the field of single crystal furnace maintenance technology, specifically to a single crystal furnace pipe cleaning device, including pipes, a cleaning mechanism, and a driving mechanism. The cleaning mechanism includes a fixed pipe, a first pipe network, and a second pipe network sequentially arranged from the outside to the inside, thereby forming a collection tank, a slag collection tank, and a dust collection tank sequentially from the outside to the inside. The fixed pipe is provided with several scrapers along its circumference, which fit against the inner wall of the pipe. The two ends of the scrapers are closed and connected to a back plate extending radially along the pipe to form a scraper bucket. The end of the scraper bucket away from the pipe has a discharge port that communicates with the collection tank. The driving mechanism includes a hollow tube driven by a hollow shaft motor. One end of the hollow tube is connected to the second pipe network and then to the dust collection tank. The other end passes through the hollow shaft motor and is connected to a transition pipe through a rotary joint. The other end of the transition pipe is connected to a vacuum cleaner through a flexible hose. This utility model can completely absorb the impurities after cleaning, avoiding secondary adhesion or overflow of impurities into the pipe and affecting the working environment, resulting in a cleaner finish.

The utility model relates to the technical field of reactors, in particular to a novel packed bed type reaction system which comprises a buffer solution supply module for supplying a buffer solution, a substrate supply module for supplying a substrate, a packed bed type reactor for filling a catalyst and a mounting bracket for mounting the packed bed type reactor, the plurality of packed bed type reactors are respectively mounted on the mounting bracket in a marshalling manner, a plurality of filling parts for stabilizing the flowing state of reaction liquid to be a laminar state are arranged in the packed bed type reactors, and catalyst layers are fixed on the filling parts. The packed bed reactor can realize supply and mixing of a buffer solution and a substrate, catalytic reaction of a reaction solution, output of a product and the like, is high in automation degree, and is internally provided with the filling part for stabilizing the flowing state of the reaction solution to be a laminar state, so that the contact time of the reaction solution and a catalyst is conveniently adjusted, and the production efficiency is improved. Therefore, the method is suitable for large-scale production and use.

This invention discloses a semi-quantitative RT-LAMP method and kit for viral nucleic acid detection based on dispensed lyophilized microspheres and a multi-channel microfluidic chip. The method includes: designing two independent LAMP primer sets (P1 and P2) for each of the SARS-CoV-2 Omicron strain N gene, Zika virus NS5 gene, H1N1 influenza virus M1 gene, and H3N2 influenza virus NP gene; preparing two independent types of lyophilized microspheres by independently mixing RT-LAMP premix containing Bst DNA polymerase and other components with LAMP primer mixture and a lyophilization protectant; and using an N-channel microfluidic chip to perform serial dilutions and parallel RT-LAMP amplification of the same sample, determining the concentration of viral nucleic acid in the sample by the positive / negative inflection points of each channel. This invention is simple to operate, requires no equipment such as a real-time PCR instrument, and is suitable for rapid virus detection in various scenarios.

This invention discloses a cross-linked polyethylene insulation material for medium-voltage DC cables and its preparation method. By weight, it comprises the following raw materials: 100-110 parts LDPE, 5-8 parts modified filler, 0.4-0.6 parts antioxidant, 0.2-0.3 parts cross-linking aid, and 0.4-0.7 parts initiator. The modified filler, prepared by a specific method, combined with an optimized cross-linking and antioxidant system, significantly improves the overall performance of the insulation material. This modified filler, through the synergistic effect of its deep trap energy levels in the core and the shallow trap energy levels of the outer organic molecules, increases the DC resistivity and breakdown field strength of the material. Simultaneously, the flexible long-chain structure grafted onto the filler surface improves its interfacial compatibility with the polyethylene matrix, giving the material excellent mechanical properties that meet the stringent requirements for long-term safe and stable operation of medium-voltage DC cables.