6 results about "Toxic environment" patented technology

The invention belongs to the technical field of production, and particularly relates to an automatic coating device for multi-layer unequal-thickness paint. A fixing plate is fixed to a paint inlet pipe, a paint guide pipe is fixed to the back of the fixing plate and connected to a paint outlet pipe, the paint outlet pipe is sleeved with the paint guide pipe, the interior of the paint outlet pipe is sleeved with a rotating rod, the middle of the rotating rod is sleeved with a bearing, the two sides of the rotating rod are fixed through paint seals, and the outermost portion of the paint outlet pipe is sleeved with a rolling brush; the lead screw is connected with the roller fixing frame on the lower portion, the motor B is fixed to the fixing plate and connected with the roller fixing frame through the rotating rod and the rolling disc, and the endoscope and the light source are fixed to the fixing plate. Automatic coating of multiple layers of coatings can be achieved, and the probability that during manual coating operation in a closed space, the corrosion and toxic environment of the coating possibly causes permanent harm to the health of personnel is greatly reduced, and the safety risk of internal operation of a suspended pipeline is greatly reduced.

The application discloses a synthetic method of a non-toxic environment-friendly type composite inoculant and application thereof, and belongs to the technical field of casting materials. According to mass parts, components of the inoculant are as follows: silicon (Si): 35-50 parts; calcium (Ca): 2-5 parts; strontium (Sr): 1-3 parts; zirconium (Zr): 0.5-2 parts; scandium (Sc): 0.3-1.2 parts; ytterbium (Yb): 0.2-0.8 parts; aluminum (Al): 0.8-2.5 parts; and iron (Fe): 1-2 parts. In the application, scandium and ytterbium, two heavy rare earth elements, are cooperatively matched, and are combined with silicon, calcium, strontium, zirconium and other elements to form a multi-element composite system.

The application belongs to the field of spacecraft and provides a propellant filling device, which comprises a containing device provided with a movement cavity, a containing cavity and a limiting cavity which are sequentially communicated, a valve core penetrating through the movement cavity, the containing cavity and the limiting cavity, a main body section of the valve core comprising a blind hole at one end towards the limiting cavity, a plurality of through holes at the middle part, a boss at the other end, an extension section connected with the boss at one end and provided with an end head at the other end, a valve seat movably sleeved on the valve core and movable in the movement cavity, one end of the valve seat towards the limiting cavity and abutting against the boss, the other end of the valve seat sealably matched with the end head, an elastic member fixed at one end of the containing cavity and connected with one end of the valve seat, and the end head and the valve seat sealing the outlet of the movement cavity together when the elastic member is in the stretched state. When filling, only an external force is needed to be applied to the valve seat to make the valve seat and the valve core sealably matched; when the filling is finished, only the external force is needed to be removed to seal the containing device, so that the rapid filling is realized and exposure to the toxic environment is avoided.

The invention discloses a vortex shedding flowmeter convenient to disassemble and assemble, and belongs to the technical field of vortex shedding flowmeters.The vortex shedding flowmeter convenient to disassemble and assemble is technically characterized in that the vortex shedding flowmeter comprises a vortex shedding flowmeter body, moving wheels can descend and make contact with the ground through an arranged supporting and adjusting mechanism, and at the moment, a bottom plate is separated from the ground; an operator can push the vortex shedding flowmeter body to move only with small thrust, the bottom plate controlled by the vortex shedding flowmeter body and the bottom plate controlled by the vortex shedding flowmeter body can correspondingly fall on the ground for stable supporting, and therefore the installation and butt joint process is well optimized, centering limiting and rotation control processing of the vortex shedding flowmeter body are achieved through the arranged disassembly and assembly limiting mechanism, and the assembly and disassembly efficiency is improved. And moreover, automatic butt joint processing of the mounting bolts is correspondingly achieved, deviation caused by manual hand holding is avoided, the mounting time of the mounting bolts is further shortened through the mounting processing mode of synchronous moving and pre-tightening guiding, therefore, the operation risk is further reduced in some dangerous and toxic environments, and the device has the advantages of being convenient to disassemble and assemble and high in disassembling and assembling efficiency.

The invention relates to a non-toxic environment-friendly water-based protective paint and a preparation method thereof, and belongs to the technical field of paints.The paint is prepared from siloxane-bio-based polyester composite emulsion, a cyclodextrin-sodium phytate-ketimine composite cross-linking agent, composite nanometer reinforcing slurry, talcum powder, hydrophilic vapor-phase silicon dioxide, sodium glycinate and deionized water. The siloxane-bio-based polyester composite emulsion is prepared from D4, tetramethylammonium hydroxide, AGE, a trimethylolpropane triglycidyl ether mixed solution, bio-based polyester polyol, an emulsifier and isodecanol polyoxyethylene ether. The cyclodextrin-sodium phytate-ketimine composite cross-linking agent is prepared from beta-cyclodextrin, epoxy chloropropane, sodium phytate, ketimine and the like. The composite nano reinforced slurry is prepared by modifying and dispersing magnesium lithium silicate and nano silicon dioxide through NDZ-201 titanate, KH550, sodium glycolate, sodium polyacrylate and the like. The coating is non-toxic and low in emission, and the adhesive force and the medium infiltration resistance are improved.