15results about How to "Not destroyed" patented technology

The utility model discloses a quick connection type water film lubricating device, and belongs to the technical field of colloid conveying. Comprising a threaded connection part, a water inlet part and a quick connector connection part. One end of the outer wall of the threaded connecting part is in a step shape, one end of the inner wall of the quick connector connecting part is in a boss shape, the step-shaped end of the threaded connecting part is connected with the boss-shaped end of the inner wall of the quick connector connecting part, and an annular gap is formed at the joint. The water inlet component is connected to the joint of the threaded connecting component and the quick connector connecting component in a sleeving mode and provided with a water inlet hole, and the water inlet hole is communicated with the annular gap. The threaded connecting part is communicated with the quick connector connecting part; the formed water film can isolate the explosive from being in contact with the pipe wall, the conveying resistance is reduced, and the purpose of reducing the conveying pressure is achieved.

The invention discloses a wind-resistant advertising lamp board, which relates to the technical field of advertising lamp boards, and comprises an advertising mounting part, the lamp board comprises a lampshade and a sealing plate mounted at the opening of the lampshade, a plurality of lamp boards are arranged at the edge position between a top tray and a bottom tray in an annular structure to form an annular structure showing stand, and the sealing plate is rotatably arranged on the opposite side walls of the top tray and the bottom tray. The other end of the pull rod is hinged to the position, close to the edge, of the side wall of the sealing plate of the lamp board. A hollow limiting seat capable of being adjusted in a lifting mode is further arranged in the hollow sleeve, can limit the positions of the pull rods when located on the upper end faces of the pull rods, and can be separated from the upper end faces of the pull rods when adjusted upwards. When strong wind is blown in extreme weather, the hollow limiting seat rises to be separated from the pull rod, and after the lampshade is transversely blown by the strong wind, the sealing plate rotates between the top disc and the bottom disc, so that an exhaust gap is formed between every two adjacent lamp boards, the wind receiving surface of the surface wall of each lamp board is reduced, and the advertising board is effectively protected from being damaged.

The present invention relates to the technical field of diaphragm gas meters, and provides an explosion-proof card diaphragm gas meter to ensure that the gas meter is always in a safe gas pressure state, seal the suddenly appearing abnormal high pressure in front of the gas meter, and prevent the gas meter from bursting. The gas meter comprises a meter case consisting of an upper shell, a lower shell and a locking step, a counter box is installed through the front wall of the meter case, a counter, a power module and a wireless radio frequency transmitter I are built in the counter box, a gas inlet and a gas outlet are arranged at the upper end of the meter case, an explosion-proof device is installed on the gas inlet, a card display meter is arranged at the upper end of the explosion-proof device, two meter boxes are arranged at the lower part of the inner cavity of the meter case, and a membrane is arranged vertically in the inner cavity of the meter box; the present invention is particularly suitable for the safe explosion-proof of IC card diaphragm gas meters, and has a high commercial prospect.

The utility model discloses a protective tool for a powder spraying combined support, which comprises a bottom plate, two side plates are arranged on the bottom plate, a plurality of round holes are arranged on the bottom plate, and mounting holes are arranged on the side plates. A gap is reserved between the protection tool and the support, the radius of the formed round hole is aligned with the circle center of the round hole of the support, and the radius of the formed round hole is smaller than that of the round hole of the support. The tool is matched with a to-be-protected support structure, it is guaranteed that a powder layer in the hole diameter of the support connecting position is not damaged, when the tool is arranged on the protective support, a gap is reserved in the middle, the support is not abraded, the round hole corresponding to the hole in the support connecting position is formed, the hole diameter of the round hole is smaller than that of the round hole in the support, and the hole in the support connecting position is effectively protected.

A refractory material and its preparation method and application, belonging to the technical field of refractory materials, the refractory material uses plate-shaped corundum modified coarse aggregate, plate-shaped corundum fine aggregate, modified artificial graphite, antioxidant, anti-corrosion agent and adhesive as raw materials. Among them, the plate-shaped corundum coarse aggregate is modified by combining coal gangue purification powder and nano-grade carbon black, which has a smaller porosity, increased volume density and strength. The delayed petroleum coke powder is modified by using plate-shaped corundum powder and phenolic resin powder, and the modified artificial graphite is sintered to prepare the modified artificial graphite, which has a certain improvement in compressive strength, thermal shock resistance, creep rate, etc., and the graphite component is not exposed on the surface of the slide. The modified plate-shaped corundum coarse aggregate and the modified artificial graphite are used in combination, which can greatly improve the strength, good thermal shock stability, and low creep rate; each time the hole is expanded, the diameter is small, the erosion resistance and erosion resistance are good, the carbon content entering the molten steel is very low, and it will not greatly affect the carbon content of low-carbon molten steel, and can be used for the pouring of low-carbon molten steel.

The application discloses a high-fidelity single-sample DOM particle-fluorescent component synchronous characterization system and method, and belongs to the field of water environment monitoring.The system comprises a gradient ultrafiltration enrichment unit, an intelligent FlFFF separation unit, a time sequence-particle size linkage collection unit, a multi-parameter collaborative correction EEM detection unit and a multi-dimensional data fusion analysis module, and realizes synchronous characterization through the steps of gradient ultrafiltration enrichment, intelligent separation, differential collection, collaborative correction detection and multi-dimensional analysis.The application has the advantages of high fidelity and high precision through the technical improvements of double-stage ultrafiltration pressure control and concentration self-adaptive flow field regulation, is suitable for various water environment samples, can output a DOM biological activity score, and provides support for ecological function research.

The invention provides a method for protecting a tunnel in a cavern, which belongs to the technical field of tunnel construction and comprises the following steps of: arranging an arch frame on the outer periphery of the tunnel in the cavern, and hanging a baffle net on the outer side of the arch frame; an outer formwork is arranged on the outer side of the blocking net around the outside of the arch frame, an inner formwork is arranged on the inner side of the arch frame, and a concrete spraying space is formed between the outer formwork and the inner formwork; concrete spraying construction is conducted on the concrete spraying space, so that the concrete forms a dense layer between the arch frame and the outer formwork, and the sprayed and rebounded concrete forms a loose layer between the arch frame and the inner formwork; and the dense layer, the blocking net, the arch frame and the unconsolidated layer serve as protective layers of the tunnel in the cavern, and the tunnel in the cavern is protected through the protective layers. The problems that in the prior art, the tunnel in the dissolving cavity mostly adopts a rigid structure protection mode, the phenomena of lining concrete cracking, waterproof plate tearing and the like are prone to occurring when the tunnel bears falling stone impact, and consequently the service life of the tunnel is shortened or water leakage occurs can be solved.

The application relates to the technical field of steel wires, and discloses a corrosion-resistant galvanized steel wire and a preparation method thereof. The corrosion-resistant galvanized steel wire is obtained by galvanizing a steel wire body through plating aid, and the steel wire body is composed of the following components in percentage by weight: C 0.15%-0.20%, Mn 0.28%-0.45%, Mo 0.15%-0.20%, Cu 0.12%-0.25%, W 0.05%-0.10%, Al 0.08%-0.12%, Ti 0.004%-0.016%, Sn 0.004%-0.015%, B 0.005%-0.01%, Y 0.005%-0.008%, S<=0.005%, P<=0.005%, and the balance is iron and inevitable impurities. Through the technical scheme, the problem that the tensile strength of the steel wire body in the galvanized steel wire needs to be improved in the related art is solved.

This invention relates to a pretreated reinforced recycled aggregate concrete and its preparation method, comprising the following raw materials: 320-360 parts cement; 20-40 parts fly ash; 80-120 parts mineral powder; 585-670 parts manufactured sand; 1050-1200 parts recycled coarse aggregate; 156-172 parts water; and 11-12.3 parts admixtures. After pretreatment, the concrete prepared from the recycled coarse aggregate exhibits significantly improved performance compared to the untreated recycled coarse aggregate. The synergistic effect of multiple pretreatment methods significantly improves the water absorption, crushing index, and apparent density of the raw coarse aggregate. Pretreatment of the recycled coarse aggregate provides enhanced conditions for internal hydration in the recycled concrete and simultaneously improves the surface roughness of the recycled coarse aggregate, thus enhancing the workability and increasing the strength of the concrete.

The invention provides a pond aquaculture water quality on-line monitoring buoy, and belongs to the technical field of water quality monitoring equipment, the lower part of a floating platform is connected with a driving screw rod, the lower part of the floating platform is provided with a filtering protective net, and the driving screw rod extends into the filtering protective net; a mounting platform is movably connected to the driving screw rod; the mounting platform can be driven by the driving screw rod to reciprocate in the filtering protective net; an integration box is arranged at the bottom of the filtering protection net and comprises an upper shell fixedly connected with the filtering protection net and a rotatable lower shell, and the driving lead screw can drive the lower shell to rotate; the outer portion of the lower shell is connected with a connecting rod, and the end of the connecting rod is connected with cleaning wings located on the outer side of the filtering protective net. According to the invention, parameter indexes of water layers with different depths can be collected, and the sensor can be prevented from being damaged by organisms cultured in water or flowing sand and stones; impurities in water can be prevented from being wound on the filtering protective net to influence parameter accuracy, and aquatic plants or microorganisms are prevented from parasitizing on the filtering protective net to influence overall parameter index accuracy of the pond.

The invention relates to the technical field of protection, in particular to a volcanic ash corrosion resistant thermal barrier coating and a preparation method and application thereof. The preparation method of the thermal barrier coating resistant to volcanic ash corrosion comprises the following steps that S1, rare earth oxide and tantalum pentoxide are subjected to ball milling and mixing, and a mixture is obtained; s2, drying the mixture, sieving, and pressing to obtain a green body; and S3, the blank is calcined and then cooled, and the volcanic ash corrosion resistant thermal barrier coating is prepared. The volcanic ash corrosion resistant thermal barrier coating powder prepared through the method is high in purity, high in density and excellent in volcanic ash type CMAS corrosion resistant effect, and can work for a long time in high-temperature and complex chemical environment scenes such as engines and turbines without being damaged.

The invention discloses a construction method for a water inlet and outlet gate shaft of a water delivery tunnel of a pumped storage power station. The construction method comprises the steps that firstly, a water inlet and outlet connection section is excavated and supported; secondly, a gate vertical shaft is excavated, and a gate vertical shaft supporting structure is constructed; the construction process of the gate vertical shaft excavation and gate vertical shaft supporting structure comprises the steps that 201, a top vertical shaft section is excavated, and a top vertical shaft section support is constructed; 201, a top vertical shaft section is excavated, and a top vertical shaft section support is constructed; 203, a bottom connector section is excavated, and a bottom connector section support is constructed. The surrounding rock structure on the periphery of the bottom connector section which is not excavated can be sealed and supported in time, so that the surrounding rock structure on the periphery of the bottom connector section is not damaged, surrounding rock supporting stability is guaranteed, excavation forming of the bottom connector section can be guaranteed, the quality control difficulty of anchor cable supporting is reduced, and the construction efficiency is improved. And the construction efficiency of the middle transition section support and the bottom interface section support is improved.

The utility model discloses a large-diameter heavy-load cable packaging tray lifting appliance, which relates to the technical field of lifting appliances and comprises two ejector pin heads and a lifting structure. The two ejector pin heads are movably connected with the two ends of the shaft sleeve in an inserted mode respectively, clamping rings are fixedly arranged on the back-to-back sides of the two ejector pin heads and located on the outer sides of the two ends of the shaft sleeve respectively, and fillets are arranged on the inner walls of the back-to-back ends of the two ejector pin heads respectively. The hoisting structure comprises a hoisting beam, two first hoisting ropes and a second hoisting rope, the second hoisting rope movably penetrates through the two ejector pins, the two ends of the second hoisting rope are installed on the two first hoisting ropes respectively, and the upper ends of the two first hoisting ropes are installed on the hoisting beam; according to the lifting appliance, the two ejector pin heads are combined with the lifting structure for use, so that the packaging disc is prevented from deflecting in the lifting process, the uniform stress of a lifting hook of the lifting appliance is ensured, the bending stress of two side plates of the packaging disc in the lifting process is reduced, and the effect of protecting the cable packaging disc and a cable product is achieved.

The utility model discloses a stamping die for producing an aluminum foil meal box. The problem that the meal box is prone to damage and deformation during unloading is effectively solved. Comprising a lower die and an upper die which are matched with each other, a plurality of die cavities are formed in the lower die, a plurality of male dies are correspondingly arranged on the upper die, top plates are arranged at the bottoms of the die cavities in a telescopic mode, the top plates are connected with a connecting plate located in the lower die, and the connecting plate is controlled by a first hydraulic cylinder to ascend and descend. An outlet communicating with the cavity is formed in the male die, and a stop lever matched with the outlet is arranged in the male die in a telescopic mode. The die is simple and ingenious in structure and convenient to use, mechanisms for discharging are arranged in the lower die and the upper die at the same time, the lower die and the upper die are matched with each other, a formed aluminum foil meal box is separated from a die cavity, the meal box is protected against damage, demolding is smoothly completed, and machining efficiency is improved.

This invention provides a power amplifier with improved bias following performance. An ADC converts the measured analog voltage into digital data, which is then fed into a DSP. The DSP acquires the signal and performs model matching with a pre-established power amplifier stage bias model to detect overload trends and whether the power amplifier is about to exceed the bias linearity range. This determines whether to adjust the power amplifier bias. If a strong overload trend (short circuit) is detected, the final stage of the power amplifier is shut down promptly. For stages exceeding the bias lead region (Class A region), a certain degree of overfit compensation is applied, ensuring the power amplifier stage remains in the high linearity region while reducing fixed bias current and power consumption, thus protecting the equipment. This invention solves the problem of large dispersion and poor bias following performance in traditional power amplifiers using analog bias. It employs a high-speed sampling and signal processing loop to improve bias following performance while effectively protecting the circuit from damage.