33results about How to "There is no hidden danger" patented technology

The invention discloses modified boron-phenolic resin and a preparation method and application thereof. The modified boron-phenolic resin is prepared from, by weight, 65-70 parts of boron-phenolic resin and 50-200 parts of silicate ester and 0.5-2 parts of titanate. The preparation method comprises the steps that silicate ester or titanate are dropwise added into the boron-phenolic resin, and the mixture is mixed to be uniform and reacted at the room temperature for 2-5 h. The modified boron-phenolic resin is still transparent and uniform after being placed at the room temperature for 3 months, no solid matter such as boric acid is separated out, the quality retention rate is also remarkably improved, and the modified boron-phenolic resin can improved product heat stability and fire resistance when used in fire resistance composite materials, functional coatings, an epoxy resin curing agent, a rubber modifying agent and the like. The preparation method is simple, no catalyst is adopted, and the problem that hidden dangers are caused when a catalyst is not thoroughly removed is avoided.

The invention relates to a cleaning method of simple substance copper scales, belonging to the field of chemical cleaning of boilers in fuel electric plants. The method comprises the following steps: (1) primary copper removal; (2) primary acid cleaning; (3) secondary copper removal; (4) secondary acid cleaning; and (5) tertiary cleaning, wherein the reagent raw materials used in the steps are metered in percentage by mass. The invention thoroughly solves the problem of simple substance copper scale removal. By using the method, the scale removal rate is up to more than 99%; and the inventionensures the safety in production, and does not have hidden danger.

The invention discloses a hollow shaft machining method. A bar is machined into a hollow shaft, an annular step is arranged on the outer circle of the hollow shaft, a center through hole is formed in the hollow shaft, and a plurality of vertical through pin holes are formed in the outer circle of the hollow shaft. The hollow shaft machining method comprises following steps: the bar is machined, and the bar is machined into a semi-finished product with the step and the center through hole; the semi-finished product is stably treated so as to release machining stress; the stably-treated semi-finished product is subject to semifinishing; a drill mold for drilling the hollow shaft is adopted to fixedly clamp and drill the semi-finished product subject to semifinishing, and a semifinishing product with the step, the center through hole and multiple small holes is formed; the semifinishing product is subject to nitrogen treatment, and the semifinishing finished product subject to nitrogen treatment is subject to finishing, and the hollow shaft is formed. The hollow shaft machining method is low in machining cost, high in yield and short in machining period.

The invention relates to the technical field of sharing locks and especially relates to a sharing lock system. The sharing lock system comprises a power supply, an electromagnetic lock, an MCU (Microprogrammed Control Unit) control module, a communication module, a remote server, an RFID inductor and a power adapter; the MCU control module is used for controlling the electromagnetic lock to unlock/lock; the MCU control module is connected with the remote server through the communication module so as to transmit signals; the MCU control module is in communicating connection with the RFID inductor through RS485 so as to induce the related products; the power supply is used for respectively supplying power to the electromagnetic lock, the MCU control module and the communication module through the power adapter. The sharing lock system is based on network, is intelligent anytime and anywhere, has an encrypted identity ID, is capable of realizing automatic identification, can more safely perform data interaction/communication and management and has a simple structure, low cost, convenience in operation, long service life, use safety, no hidden danger and capability of meeting market requirements.

The invention relates to an oral fast-dissolving film of a xanthophylls-loaded albumin nanoparticle and a preparation method thereof. The preparation method comprises the following steps: preparing the xanthophylls-loaded albumin nanoparticle from xanthophyll by using an anti-solvent precipitation method and then preparing the oral fast-dissolving film of the xanthophylls-loaded albumin nanoparticle by using a solvent casting method. The film prepared in the invention has an intact surface, no bubble, a uniform color and consistent thickness; drug distribution is uniform; and compared with a xanthophyll bulk drug and an oral fast-dissolving film prepared from the xanthophyll bulk drug, the oral fast-dissolving film prepared in the invention is substantially increased in in-vitro release and in-vivo absorption speeds and degrees and obviously improved in bioavailability.

The invention discloses a replaceable sputtering-resistant vacuum cavity for an electric thruster ignition test and an assembly method. The replaceable sputtering-resistant vacuum cavity comprises a vacuum cavity body, sputtering-resistant protection plates, channel steels and a water inlet and outlet pipeline; n sputtering-resistant protection plates are circumferentially and uniformly distributed and spliced to form a structure with an n-sided cross section, the sputtering-resistant protection plates are fixedly connected with the inner wall of the vacuum cavity through channel steel, and the inner wall of the vacuum cavity is a cambered surface. Grooves are machined in the end faces, facing the vacuum cavity, of the steel channels. A cavity formed by closing the grooves and the inner wall of the vacuum cavity is used as a cold water pipeline; the vacuum cavity is provided with a through hole on a wall surface, one end of the water inlet and outlet pipeline is communicated with the cold water flow channel through the through hole in the wall surface of the vacuum cavity, and the other end of the water inlet and outlet pipeline is connected with an external cold water circulationsystem. The replaceable sputtering-resistant heat dissipation device has the advantages of being simple in structure, low in manufacturing cost, low in reliability risk, easy to maintain and the like.

The invention discloses a control method for preventing oil throwing during starting of a multi-connected air conditioning unit. The control method comprises specific steps as follows: a, the front end of an upper U-shaped pipe (1) is connected with an outlet of an oil separator (2); the rear end of the upper U-shaped pipe (1) is connected with the front end of a lower U-shaped pipe (3); the rear end of the lower U-shaped pipe (3) is connected with the lower end of a lengthened vertical pipe (4); the upper end of the lengthened vertical pipe (4) is connected with a first valve port of a four-way reversing valve (5); the bottom of the lower U-shaped pipe (3) and an inlet of a compressor (7) are communicated through an oil return pipeline (6) provided with an electromagnetic valve (8) and capillary pipes; b, the compressor (7) is started, and the electromagnetic valve (8) of the oil return pipeline (6) is opened after the compressor (7) operates for a period of time. According to the method, the operation cost is low, and the hidden danger of liquid impact on the compressor (7) is avoided.

The invention provides an aging accelerating method for solid-state brewed vinegar, and belongs to the technical field of production of brewed seasonings. The aging accelerating method comprises the following steps: adding amino acid and glucose into mature vinegar fermented grains fermented at normal temperature to prepare charged fermented grains, then carrying out heat-preservation thermal reaction by adopting a two-step method, naturally cooling and carrying out cold condensation to slowly condense essence components in the fermented grains, and directionally preparing to obtain aged vinegar fermented grains meeting the style requirement of mature vinegar. The aging accelerating method provided by the invention is simple and practical in technical process; compared with traditional flame vinegar baking in alpine regions, the aging accelerating method provided by the invention is standard, environment-friendly and sanitary in technical process, simple, convenient and feasible in implementation process, coherent and smooth, low in consumption and high in efficiency; and a product meets the specific sensory characteristics of the mature vinegar, namely rich fragrance, sourness, softness and long lasting.

The invention relates to the technical field of gas engines, in particular to an air inlet assembly of a gas engine. The adopted technical scheme is as follows: the air inlet assembly of the gas engine comprises a throttle valve; the throttle valve comprises a vent hole and a valve plate; the valve plate is provided with a rotating shaft; two rotating shaft holes are formed in the side wall of thevent hole; the two ends of the rotating shaft are inserted into the rotating shaft holes respectively; a mechanical sealing device is arranged at the outer end of the rotating shaft hole; a first airinlet is formed in the hole wall of the rotating shaft hole of the throttle valve; the first air inlet is located in the inner side of the mechanical sealing device; and the first air inlet is used for being connected with a compressed air source. High-pressure compressed air is used for conducting air sealing on the rotating shaft hole, air sealing is added on the basis of mechanical sealing ofthe throttle valve, potential safety hazards caused by leakage of mixed air can be avoided, and the throttle valve has the advantages of being good in sealing performance and high in safety.

The invention provides an auxiliary installation device for a train bottle cable box of a special-shaped train model of a commuter train. According to the auxiliary installation device, wire arrangement operation is more comfortable, faster and safer. The auxiliary installation device comprises a pre-arranging and overturning mechanism, a cable box transferring mechanism and a cable box supporting mechanism which are sequentially used in cooperation. The pre-arranging and overturning mechanism comprises a base. Multiple first wheels are installed below the base. An overturning drive mechanism is installed at the middle portion of the base. An overturning balance mechanism is arranged at each of the two ends of the base. The overturning drive mechanism comprises a transmission case, a handle, a first gear and a second gear. The transmission case is installed on the base. The handle is installed on the transmission case. A power output shaft of the transmission case is in circumferential limiting fit with the first gear, and the first gear is engaged with the second gear. The cable box supporting mechanism comprises a supporting base. Four wheel frames are installed at the lower end of the supporting base. Second wheels are installed on the wheel frames. Multiple supporting sleepers are connected to the supporting base through stand columns, and the supporting sleepers are fixedly connected through sleeper connecting bars.