30results about How to "Guaranteed operating time" patented technology

The invention discloses an endoscopic robot based on lead screw active leg extension and contraction device. The device comprises a robot body, a control mechanism and a leg structure. The robot bodyis provided with a control mechanism, and the control mechanism is provided with a camera and a motor. The output shaft of the motor is fixedly connected with a leg structure, and the control mechanism is electrically connected to a control terminal of the peripheral device. The endoscopic robot based on lead screw active leg extension and contraction device can make the robot well in the premiseof ensuring complexity and operating time through the improvement of the leg structure and the cooperation of the camera and the motor, avoiding obstruction of the structure of the lumen tube and somelesions during the advancement process.

The invention discloses an environmentally-friendly storage-stable polyurethane composition for reaction injection molding and a preparation method thereof. The polyurethane composition is composed of a component A and a component B, wherein the component A comprises 50-90% of polyether polyol, 1-40% of chain extender, 0-10% of pigment, 0-5% of anti-aging agent and 0.01-3% of composite catalyst; the component B comprises 60-95% of diisocyanate and 5-40% of polypropylene oxide glycol; the composite catalyst is composed of an organic bismuth or organic zirconium catalyst and a hindered amine catalyst; and the hindered amine catalyst is prepared by the following steps: mixing 1 part of triethylene diamine with 2 parts of ethylene glycol or diethylene glycol, heating to 70-80 DEG C, stirring and dissolving, adding 15-30wt% of salicylic acid, and stirring and reacting for 1 hour at the temperature of 80 DEG C. The composition is stable in storage and environmentally friendly.

The invention belongs to the technical field of high molecular fine chemical engineering, and discloses a modified epoxy resin seepage-prevention and leak-stopping grouting material and a modified epoxy resin seepage-prevention and leak-stopping method for concrete in an arctic-alpine area. The modified epoxy resin grouting material is prepared from 40 to 60 parts of modified epoxy resin, 25 to 50 parts of active diluting agent, 10 to 20 parts of curing agent and 2 parts of accelerating agent, and is obtained by mixing the modified epoxy resin, the active diluting agent, the curing agent and the accelerating agent at 0 to 5 DEG C. The modified epoxy resin grouting material is lower in viscosity at a low temperature, good in toughness and good in freezing and thawing resisting cycle performance, is not obviously decreased in mechanical performance after undergoing a freezing-and-thawing cycle for above 50 times, is sufficient in operating time, is appropriate in curing time, has the curing time which is approximately 10h to 15h after the mixing, is guaranteed in use effect through the appropriate curing time, and is good in bonding performance. The adopted grouting material has the wet-base-surface bonding strength which is more than 4MPa and the dry-base-surface bonding strength which is more than 3.5MPa; thus, the use requirement of a project in the arctic-alpine area can be met.

The invention discloses addition silica gel capable of being used for a silica gel reprinting model of a slush mold, and a preparation method and an application of the addition silica gel. A phenomenon of non-solidification of the silica gel when the silica gel reprinting model is fabricated on the surface of polyvinyl chloride skin containing heavy metal pollution is avoided. The addition silicagel comprises the following ingredients in parts by weight: 100 parts of mixture of vinyl silicone oil and hydrogen silicone oil, 20-30 parts of vinyl MQ (mono-quad) liquid silicon resin, 12-14 partsof gas phase white carbon black, 5-10 parts of viscosity modifier, 2-3 parts of platinum catalyst and 0.7-0.9 parts of inhibitor. The preparation method comprises the steps of mixing and stirring theingredients at a temperature of 23-25 DEG C, and a speed of 2500r / min for 5min. The invention provides the application of the addition silica gel in fabricating the silica gel reprinting model of theslush mold of an automobile instrument board. The addition silica gel is high in solidification speed and low in cost, and the preparation method is simple.

The invention relates to an anti-sagging lightweight gypsum for ceilings. The raw materials of the light gypsum include the following components in parts by mass: 100 parts of building gypsum, 25-35 parts of vitrified microbeads, and 75-85 parts of water 0.2-0.5 parts of thixotropic agent, 0.2-0.6 parts of adhesive, 0.2-0.5 parts of water-retaining agent, 0.3-0.9 parts of water-reducing agent, and 0.2-0.5 parts of retarder. The present invention adopts the light gypsum prepared by composite methods such as overall particle gradation optimization and the appropriate ratio of external additives, etc., to solve the related problems in the construction process of the thermal insulation on the household floor slabs, and to obtain anti-sagging and high Lightweight gypsum with adhesive strength is very suitable for roof construction, and because it has excellent thermal insulation at the same time, it can greatly reduce the energy consumption of building operation and can be applied in industrial production.

The invention discloses a magnesium phosphate cement road rapid repair material, which is compounded by phosphate-based powder A, magnesium oxide-based powder B and polymer emulsion C in proportion. The invention adopts composite retarding technology to effectively extend the operable time; adopts phosphorus slag powder as a mineral admixture, and can promote the hydration degree of magnesium phosphate cement while retarding; adopts multifunctional composite polymer emulsion to improve the hydration of magnesium phosphate cement The toughness is improved while the water resistance is improved; the obtained improved magnesium phosphate cement can exhibit excellent operability, use performance and stability performance, and the involved preparation method is simple and low in cost, and is suitable for popularization and application.

The invention discloses a method for cultivating microspore plants of non-heading Chinese cabbage, which specifically includes the following steps: (1) selecting flower buds: selecting flower buds with a ratio of petals to anthers of 1:1; (2) cultivating microspore embryos: The flower buds collected in step (1) are disinfected with sodium hypochlorite solution for 10-15 minutes, washed with sterilized water, and rinsed with NLN-13 medium; the rinsed flower buds are fully ground, filtered, and centrifuged to contain 10-30mg / L boron substances NLN‑13 culture medium was diluted, distributed into petri dishes and added with activated carbon, heat shock treatment, 24‑26 °C dark culture for 14‑16 days, to form embryoid bodies; (3) mature embryos germinated into plants: embryoid bodies Shaking culture is carried out, and the mature embryos that have turned green are transferred to solid MS medium for cultivation. After 38-42 days of cultivation, the hardened seedlings can be directly transplanted. Under the condition that the embryo emergence rate can be guaranteed, the method of the invention simplifies the operation steps, greatly reduces the operation time, and improves the plant production efficiency.

The invention relates to processing equipment and a processing technique for poultry feather protein powder, which belongs to the technical field of processing equipment and processing technology for animal derived protein feed, feather powder. The equipment is characterized by comprising a preprocessing system, the preprocessing system is communicated with a hydrolization pressure relief system through a pipeline and a first control valve and also communicated with a vacuum drying system through a pipeline and a second control valve, and both the hydrolization pressure relief system and the vacuum drying system are communicated with a softened water treatment unit. The technique is characterized by including: firstly, dewatering, separating and drying; secondly, relieving hydrolization pressure; thirdly, condensing; fourthly, performing vacuum drying; and fifthly crushing and packaging. The equipment is reasonable in structural design, energy-saving and emission-reducing, environmental harm caused by exhaust emission can be reduced effectively, vacuum drying time is short, drying efficiency is high, using a water cooling tower to timely restore normal operation of the equipment during use guarantees operational time and efficiency of the whole technical flow, and classified emission and treatment for both generated waste water and waste gas are beneficial to environment protection.

The invention relates to a sealant for prefabricated buildings and its preparation and use method. It is composed of two components AB, and the sealant can be obtained by adjusting the proportion of components A and B according to the construction environment temperature and construction technical requirements. Material, the sealing grout mixed with water has the characteristics of early strength, high strength, micro-expansion, and high adhesion, which can meet the construction requirements for material performance or be used as emergency treatment materials for grouting leakage, ensuring the construction quality of prefabricated buildings and greatly improving the quality of prefabricated buildings. Improve construction efficiency.