7results about How to "Meet durability requirements" patented technology

The ultrahigh-pressure axial-flow type gas pressure regulator comprises a left valve body, a middle valve body, a right valve body and a pressure regulating assembly, the left valve body is provided with a gas inlet channel, a valve clack and a guide sleeve are fixed to the right end of the left valve body in a sealed mode, the valve clack is provided with a vent hole, a pressure regulating gas channel is formed between the guide sleeve and the valve clack, and the middle valve body is connected with the left valve body and the right valve body in a sealed mode in a left-right corresponding mode. The pressure adjusting assembly comprises a piston and a valve cylinder, the piston is in sliding sealing fit with the middle valve body, the valve cylinder is fixed to the middle of the piston in a sealing mode, the left half portion of the valve cylinder is in sliding sealing fit with the guide sleeve, the right half portion of the valve cylinder is in sliding sealing fit with the right valve body, and the space between the piston and the left valve body is an inflation cavity. A space between the piston and the right valve body is a feedback cavity which is communicated with the air outlet channel; the left valve body, the middle valve body, the right valve body, the valve clack, the guide sleeve, the piston and the valve cylinder are all made of austenitic stainless steel. The device has the advantages of simple structure, safety, reliability and high practicability.

The utility model relates to the technical field of greenhouse agricultural drainage ditches, in particular to a novel greenhouse agricultural drainage ditch which comprises a foundation, an agricultural greenhouse is arranged on the foundation, an external drainage ditch and an internal drainage ditch are formed in the foundation, a first soil hardening layer is arranged in the external drainage ditch, and a second soil hardening layer is arranged in the internal drainage ditch. A first waterproof film is arranged in the first soil hardening layer, and a weeding film is arranged above the external drainage ditch. Compared with the prior art, the novel greenhouse agricultural drainage ditch has the advantages that in the aspect of material selection of the ditch, a concrete hardening ditch which is extremely easy to block by sludge and is high in secondary ploughing difficulty and an assembly type ditch which is easy to deform and high in manufacturing cost are abandoned, and the novel greenhouse agricultural drainage ditch not only prevents land deformation and weeds from growing in the ditch, but also has the advantages of being simple in structure and convenient to use. The cost is lower, the durability is higher, the secondary ploughing difficulty is small after the steel structure is abandoned, the damage to the environment is small, the flood resistance of the agricultural greenhouse is effectively improved, and the service life of the steel structure of the agricultural greenhouse is effectively prolonged.

The present application relates to the field of fiber composite material strength detection, and more particularly to a road repair fiber composite material strength intelligent testing system, which is characterized by a feature extraction module for obtaining performance data of the fiber composite material to extract corresponding material mixing features; a suitable analysis module for analyzing the quality suitable representation value of the fiber composite material based on the material mixing features to classify the quality suitable categories of the fiber composite material; a selection and calling module for selecting and calling a quality evaluation module or a material labeling module according to the quality suitable categories; the quality evaluation module for evaluating and analyzing the strength quality of the fiber composite material; and the material labeling module for labeling the fiber composite material and performing secondary stirring and dispersion processing. The system realizes efficient, accurate and automatic detection of the strength of the road repair fiber composite material, significantly improves the detection efficiency and quality determination reliability, and reduces the cost of invalid testing and material waste.

The application provides a hot base zinc-aluminum-magnesium differential thick plating layer control method, and belongs to the technical field of metal material processing; the method comprises plate shape pretreatment on a hot-rolled base plate, the plate shape pretreatment comprises scale breaking treatment and flattening treatment, so that the transverse thickness difference, longitudinal flatness and residual stress of the base plate after the pretreatment are controlled within a specific range; the strip steel after the plate shape pretreatment is subjected to heating reduction and hot dip plating; the strip steel after the hot dip plating is vertically led out of the plating solution and passes through air knives; the blowing pressures of the front air knife and the rear air knife are set to be the same, the spacing between the front air knife and the lower surface of the strip steel and the spacing between the rear air knife and the upper surface of the strip steel are set to be different, and the plating layer thickness difference between the upper surface and the lower surface is controlled by adjusting the spacing difference. The application realizes the differential control of the plating layer thicknesses of the upper surface and the lower surface of the strip steel by combining the plate shape pretreatment before entering the pot with the air knife same-pressure different-spacing regulation, so that the plating solution consumption is saved and the product surface quality is improved.

The invention discloses a bio-based core-shell structure flame retardant and an application thereof in a bio-based plate. According to the invention, a phosphorus-carbon synergistic flame-retardant core-shell structure flame retardant is developed by taking a phosphorus-containing halogen-free flame retardant as a core and carrying out free radical copolymerization reaction on a furfuryl alcohol (FA) derivative containing phosphorus in different oxidation states and bismaleimide (BMI) with a charring function to form a cross-linked flame-retardant macromolecular shell layer. The core-shell flame retardant is proportionally mixed with crushed materials of a biological base material and an adhesive, and the mixture is subjected to hot press molding to obtain the flame-retardant biological base material. The flame retardant provided by the invention not only can endow a biological base material with good flame retardance and mechanical properties, but also can solve the problem of long-term durability of the biological base material.

The present application relates to the field of subgrade soil treatment, and particularly relates to a subgrade in-situ soil high-performance ecological enhancer, a preparation method and a construction method, the enhancer comprising the following raw materials in percentage by mass: sulphoaluminate cement 45-85%; Portland cement 8-25%; quicklime 3-5%; fly ash 0-15%; silica fume 0-8%; slag powder 0-15%; sodium sulfate 3-5%; sodium silicate 0-2%; lithium carbonate 0-0.8%; polymer enhancer 0-1.5%; silicone powder 0-1.5%; sodium lignosulfonate 0.1-0.3%. The enhancer effectively combines the advantages of sulphoaluminate cement and Portland cement, combines other components, has the characteristics of rapid setting and fast early strength development, can regulate soil strength, meets the requirements of compressive strength and durability in engineering construction, shortens the construction period, and meets the demand of 4-6h rapid traffic under the scene of emergency repair.

The application provides a preparation method of nanocellulose-based composite thermal insulation material and application thereof. The method first prepares a GO-NC-Ce hybrid dispersion liquid through ultrasonic-assisted self-assembly; then, a flexible polymer is used as a matrix, carbon nanotubes, pre-dispersed aerogel particles, phase change microcapsules, a phase change energy storage framework and a composite foaming system are added, and a multifunctional composite slurry is prepared through high-speed shearing and vacuum degassing; subsequently, a gradient ice crystal template is formed through a freeze-drying technology by controlling a freezing rate, and a foaming body with a gradient pore structure of a bottom layer, a main body layer and a surface layer is obtained after sublimation of the ice crystal; finally, a surface layer slurry containing sepiolite fibers, nanometer titanium dioxide and a hydrophobic agent is sprayed on the surface of the foaming body and solidified to obtain the composite thermal insulation material. The obtained material has controllable porosity and excellent heat insulation performance, and is suitable for the field of wearable textile thermal insulation.