83results about How to "Good economical applicability" patented technology

The invention aims at providing a treatment scheme of ammonia nitrogen in sucralose production wastewater, and discloses a method for recovering dimethylamine from sucralose production wastewater. The method comprises the following steps: a highly alkaline material is added into wastewater containing 10-30% of dimethylamine hydrochloride and 1-5% of N,N-dimethylformamide, such that an intermediate product with a dimethylamine concentration of 10-30% is obtained; the intermediate product is subjected to rectification purification, such that a dimethylamine solution with a concentration higher than 35% is obtained. The technical scheme provided by the invention has the advantages of low energy consumption, low investment, and reasonable economic benefit. While ammonia nitrogen wastewater is treated, dimethylamine is recovered. The method has high practicality and good economic applicability for enterprises.

The invention discloses a hybrid energy storage optimal configuration method for a grid-connected wind storage power generation system, and the method comprises the steps: carrying out the frequency domain decomposition of historical wind power output power, carrying out the statistics of high and low frequency components of the historical wind power output power, and determining the hybrid energystorage rated power based on a probability distribution function; constructing a wind power plant full-life-cycle hybrid energy storage capacity optimization model taking the minimum annual cost netpresent value and the maximum target output satisfaction rate as targets; extracting wind power output power daily typical scenes based on a clustering algorithm, and counting the time proportion of each typical scene to serve as an input scene of the wind power plant full-life-cycle hybrid energy storage capacity optimization model; and solving by adopting a multi-objective optimization algorithmto obtain an optimal hybrid energy storage capacity configuration scheme of the grid-connected wind storage power generation system. By optimizing the distribution of high-frequency and low-frequencyfluctuation components between hybrid energy storage, the fluctuation stabilizing effect can be effectively improved while the service life of a battery is prolonged.

The invention provides an elastic conductor composite film and a preparation method thereof. According to the elastic conductor composite film, an electrospinnable thermoplastic elastomer and liquid metal are adopted as raw materials, the base film layer of the composite film is obtained through an electrospinning technology, the surface of the base film layer is coated with the liquid metal, andthe obtained composite film is good in stretchability and high in conductivity and has excellent electrical stability while being resistant to stretching; the electrospun fibers of the base membrane layer are of a reticular pore structure so that the composite film also has good vapor permeability and air permeability; the thermoplastic elastomer and the liquid metal for preparing the composite film belong to materials with lower cost so that the production cost of the composite film is reduced, and the economic applicability is good; universal preparation means such as electrospinning and coating are beneficial to large-batch industrial production, the composite film can be physically expanded according to actual application requirements, and compared with an existing conductive material,the elastic conductor composite film is more suitable for the fields of stretchable electronic circuits, flexible batteries, stretchable light source devices, wearable equipment and the like.

The invention relates to a soil cutting device for accurately obtaining non-rhizosphere soils at different distances from rhizosphere. A circular root box soil block tray device, a soil block locating lead screw device, a blade regulating device, an adjustable-speed motor switch and the like are arranged on a bracket, the bottom of a circular tray is connected with a rotating shaft of an adjustable-speed motor, anti-sliding soil block stop sheets are circumferentially uniformly distributed on the edge of the circular tray and fixed by soil block locating bolts; a first hand wheel in the soil block locating lead screw device and the upper end of a first lead screw are welded together; a second hand wheel in the blade regulating device and the upper end of a lead screw are welded together, the lead screw is matched with a thread on an auxiliary blade holding frame, the auxiliary blade holding frame is connected with a blade holding frame through a third lead screw, one end of the third lead screw and a third hand wheel are welded together, a blade is fixed on the blade holding frame; a first lead screw locating block in the soil block locating lead screw device is sleeved on the first lead screw and is connected with a bracket main cross beam bolt; the first lead screw is concentric with the rotating shaft of the adjustable-speed motor, and the blade regulating device is fixed on the lead screw.

The invention provides a high-efficiency catalyst for purifying tail gas of adipic acid device, and a forming technology method of the catalyst. The high-efficiency catalyst is prepared from the following components in percentage by mass: 80-90% of carrier skeletons, 5-20% of active components, and 0.1-5% of promoter, wherein the active components contain divalent metal elements and trivalent metal elements. The concentration of N2O in industrial waste gas can be efficiently reduced. In addition, the catalyst can be directly formed and produced in batches, thus providing effective guarantee for the industrial application of the catalyst.

The invention relates to a method for separating Kudinoside A and Kudinoside D from Ilex kudingcha C.J.Tseng. The method comprises the following steps: using an Ilex kudingcha C.J.Tseng (Ilex kudingcha C.J.Tseng ) medicinal material as a raw material, extracting through an alcohol solution, chloroforming for removing impurities, extracting through n-butyl alcohol, and performing macroporous resin column chromatography and reversed-phase high performance liquid refining separation and recrystallization so as to obtain a high-purity monomeric compound of the Kudinoside A (Kudinoside A) and the Kudinoside D (Kudinoside D). The technical method disclosed by the invention is simple and reliable, raw materials are easy to obtain, the economic cost is low, the purity of the monomeric compound is high, and the method is suitable for large-scale preparation of the kudinoside A and the kudinoside D.

The invention discloses a preparation method and application of a Cu / MOF catalyst in acetylene hydrochlorination reaction. The Cu / MOF catalyst takes a metal organic framework material as a carrier, and the preparation method comprises the following steps: loading a bivalent copper-containing precursor on the carrier by a solution impregnation method, carrying out vacuum drying treatment, and then treating by a glow discharge method to finally obtain the Cu / MOF catalyst. The prepared Cu-MOF catalyst is applied to acetylene hydrochlorination reaction, high conversion rate and high selectivity of acetylene hydrochlorination reaction can be achieved, the stability is high, and the Cu-MOF catalyst has high economic applicability and industrial application value.

The invention provides 600MPa-grade hot rolled TRIP(transformation-induced plasticity)-type double-phase steel and a preparation method thereof. The 600MPa-grade hot rolled TRIP-type double-phase steel comprises retained austenite, martensite and ferrite; a surface layer of the steel comprises 4-6% of the retained austenite, 5-15% of the martensite and the balance of the ferrite containing rod-like carbides; a main body of the steel comprises 2-5% of the retained austenite, 25-40% of the martensite and the balance of the ferrite, wherein no carbide is precipitated from the ferrite. The specified plastic elongation strength of the steel is 333-351MPa, the tensile strength is 602-614MPa, and the elongation after fracture (80mm in gauge length) is 23-25%. The steel can be applied to complex automotive structural parts and chassis parts, and has high economical efficiency and a good application prospect.

The invention belongs to the technical filed of drilling in the field of oil and natural gas, in particular to a half-way rotary well track control tool. The half-way rotary well track control tool ischaracterized in that the half-way rotary well track control tool comprises a shell, a support sleeve, an outer barrel, a mechanical clutch pup joint arranged in the shell, and an electric control pup joint arranged in the outer barrel, the electric control pup joint comprises an electronic module, a direct current motor and a telescopic mechanism, the mechanical clutch pup joint comprises an upper joint, an upper half clutch, a center rod, a lower half clutch, an upper pressing cap, a bearing assembly, a seal combination, a group of piston claw, a reset spring, the bottom of the center rod is connected with the telescopic mechanism in a threaded mode, the lower half clutch is connected with the upper part of the center rod, and the bottom end of the outer barrel is provided with a lowerjoint. According to the half-way rotary well track control tool, use is convenient, the cost is low, reliable and effective well track control can be realized, an upper part pipe column of the half-way rotary well track control tool completely rotates, ranges of friction reduction and drag reduction are large, and at the same time, the well cleaning ability can be improved; and compared with rapidsliding drilling, technical advantages are obvious, and compared with a rotary guide drilling tool, economic applicability is good.

The invention discloses a grouting-stop plug for an anchor rope. A silica gel plate is clamped between two PVC (polyvinyl chloride) plates with higher hardness, a bolt is used for fixing the two PVC plates with the silica gel plate to make a disk-shaped plug body, round reservation holes for an injection pipe, an exhaust pipe and a steel strand to penetrate are symmetrically arranged in the disk-shaped plug body, and the disk-shaped plug body is arranged and fixed on an anchor rope; the PVC plate is provided with a PVC plate anchor rope steel strand reservation hole, a PVC plate injection pipe reservation hole and a PVC plate exhaust pipe reservation hole are arranged in the PVC plate; the silica gel plate is provided with a silica gel plate anchor rope steel strand reservation hole, a silica gel plate injection pipe reservation hole and a silica gel plate exhaust pipe reservation hole; and the silica gel plate injection pipe reservation hole and the silica gel plate exhaust pipe reservation hole are smaller than the outer diameters of the anchor rope steel strand, the injection pipe and the exhaust pipe. The grouting-stop plug for an anchor rope has a simple structure, strong applicability, low manufacturing cost and good grouting stop effect, is convenient to use, can ensure the grouting pressure, can meet the requirement of hole sealing of anchor ropes with different apertures, different grouting pressure and different structural forms, and has a good hole sealing effect and good economic applicability.

The invention relates to a hydraulic swing cylinder driving joint based robot hydraulic mechanical arm. The robot hydraulic mechanical arm includes a small joint arm and a big joint arm; the small joint arm and the big joint arm are connected through a joint arm connection rod; each of driving joints of the small joint arm and the big joint arm includes two hydraulic swing cylinders, wherein output shaft ends of the two hydraulic swing cylinders are mutually perpendicular; the hydraulic swing cylinders are arranged in a support; the output shaft ends of the hydraulic swing cylinders in the support are connected to gears; and the gears are engaged with potentiometer gears at the tails of the potentiometers. The robot hydraulic mechanical arm is simple in structure, is convenient in modular production, and can be applied and promoted to industry; a driving section is driven by the hydraulic swing cylinders, a large output torque can be acquired, and the bearing capability is further improved; and meanwhile, the rigidity is better than that of motor-driven mechanical arms, the production cost is low, the difficulty of manufacture is small, better economy can be acquired, and the practicality is high.

The invention discloses a two-dimensional visual grouting experiment box and a use method, and aims to accurately grasp the diffusion rule and the flowing property of filling slurry between broken roofs or caving gangues and facilitate people to research the filling performance, the grouting effect and other contents of the filling slurry. The two-dimensional visual grouting experiment box mainly comprises a transparent acrylic plate, fixed channel steel, screws and the like. Six transparent acrylic plates are fastened into a box body through components such as a groove structure, fixing channel steel and screws, a grouting hole is drilled in the center of a front plate of the box body, and concentric circles are drawn with the grouting hole as the center and used for observing the diffusion radius, path and effect of filling slurry. The two-dimensional visual grouting experiment box is convenient to operate, simple and easy to implement and small in size, a large amount of cost is saved, blindness and uncertainty risks of on-site grouting and filling are reduced, and scientific research and verification can be facilitated.

The invention discloses a dual-polarized filtering patch antenna with high selective gain. The dual-polarized filtering patch antenna comprises a metal reflection floor, a first dielectric substrate,a second dielectric substrate, a first metal column, a second metal column, a first metal feed sheet and a second metal feed sheet which are sequentially arranged from bottom to top, a preset distanceis kept between the metal reflection floor and the first dielectric substrate, a preset distance is kept between the first dielectric substrate and the second dielectric substrate, an air layer is formed, two input through holes are formed in the metal reflection floor, the metal feed pieces are connected with the input through holes through metal columns respectively, and the metal columns and the input through holes form input ports. The first dielectric substrate is provided with a first rectangular patch, the first rectangular patch is provided with four slot lines which extend from fourcorners of the first rectangular patch to the center and are not intersected with each other, the second dielectric substrate is provided with a second rectangular patch, and the center of the secondrectangular patch is provided with a cross-shaped slot line; the dual-polarized filtering patch antenna has impedance matching characteristics, and the rectangular patch is applied to introduce a radiation zero point, so that the dual-polarization structure is reserved, and the filtering performance is realized.

The invention provides a constant-density biomass gasifier which comprises a gasifier body, a movable gasifier cover and a self-rotating nozzle, a material pressing mechanism is arranged on the movable gasifier cover and comprises a driving device and a material pressing disc, and the material pressing disc is used for providing downward constant pressure for biomass fuel in the gasifier body under the driving of the driving device; therefore, through the material pressing mechanism arranged on the movable furnace cover, a continuous pressure from top to bottom or an intermittent impact striking effect is exerted on the biomass fuel in the material storage area in the furnace, so that a fuel layer stably descends, the compactness of the material layer is improved, and the bridging phenomenon of the material layer is eliminated; meanwhile, by means of the self-rotating nozzle, a gasifying agent evenly enters the reaction area from the center direction, an oxidation layer and a reduction layer are stable and balanced, and the burn-through phenomenon is eliminated; besides, except for filling the biomass raw materials and discharging the biochar, other operation processes are easy to realize automatic control, so that the operation cost is greatly reduced, and the economic applicability is better.

The invention discloses a deep treatment process for coal-to-liquids wastewater, and the process flow is as follows: water discharge after coal-to-liquids wastewater is subjected to biochemical treatment and passes through a regulating unit, a filtering unit, a deep oxidation unit, a product pond, and water discharging is carried out. According to the process, organic matters and biological metabolic products which are difficult to be biodegraded in biochemical discharged water of coal-to-liquids wastewater can be quickly oxidized, and chromophoric groups can be destroyed, thereby improving the biodegradability of wastewater, and improving the stability and reliability of up-to-standard release and reclaimed water reuse; and the deep treatment process disclosed by the invention is less in investment, low in running cost, small in land-occupied area and short in treatment cycle, has a remarkable decolorization effect on wastewater, and does not cause secondary pollution, therefore, the process has good spreading and application prospects.

The invention provides a circling type inlet air pre-filtering device. The circling type inlet air pre-filtering device comprises an air inlet pipe. The air inlet pipe is formed by integrally connecting a transverse air inlet pipe body, a vertical air inlet pipe body and the installation end of an air filter. A plurality of baffles are arranged in the vertical air inlet pipe body at certain intervals in a mutually staggered manner in the vertical direction, so that a circling type air inlet channel is formed in the vertical air inlet pipe. A dust collecting disk is arranged on the outer wall of the vertical air inlet pipe body, and the dust collecting disk communicates with the bottoms of the baffles in the vertical air inlet pipe bodies. According to the circling type inlet air pre-filtering device, the circling type air inlet and dust removing idea is introduced to an external air inlet pipe path of the air filter, the pre-filtering effect is enhanced, the filtering load of the air filter is reduced, the maintenance period of a filter element of the air filter is prolonged, the filter element maintenance labor intensity of a driver is lowered, and the circling type inlet air pre-filtering device has relatively good economic applicability.

The invention discloses a multilayer functional gradient vertical shaft wall structure. The shaft wall structure comprises a plurality of coaxial concrete functional layers, wherein the using functions of the functional layers of the whole shaft wall structure are changed in a gradient mode from outside to inside, a functional gradient shaft wall can be composed of an anti-seepage layer, a water pressure resisting layer, an anti-corrosion layer, a fire resisting layer and other functional layers, the water pressure resisting layer is composed of multiple coaxial and equal-thickness structurallayers with the elasticity modulus changed in a gradient mode in the radial direction, the elasticity modulus of the structural layers of the water pressure resisting layer is gradually reduced from outside to inside, the structural layers of the water pressure resisting layer can be in direct contact connection or connected through connecting pieces, and the functional layers are in direct contact connection. The water pressure resisting layer of the functional gradient shaft wall enables stress in the shaft wall to be redistributed by changing the elasticity modulus, the strength of concreteon the outer side of the shaft wall is fully utilized, and the bearing capacity of the shaft wall is fully exerted. The functional layers such as the anti-seepage layer, the water pressure resistinglayer, the anti-corrosion layer and the fire resisting layer of the functional gradient shaft wall are combined for use, the using performance of the shaft wall under the complex geological conditionis improved, and the application range is widened.

The invention discloses an activecarbon catalystloaded with copper-containing high-entropy alloy for acetylene hydrochlorination reaction as well as a preparation method and application of the active carbon catalyst. The catalyst comprises an activated carbon carrier and a metal component loaded on the carrier, the metal component is composed of a Cu element, a metal element A and a metal element B, the metal element A represents one or two precious metal elements of Au, Ag, Pd, Pt and Ru, the metal element B is selected from two or three metal elements of Fe, Mn, Zn, K, Ca, Sn, Ni, Co, Cr, Al and In, the number of the metal elements A and B is four, and the metal element B represents one or two precious metal elements of Au, Ag, Pd, Pt and Ru. The loading capacity of the copper element is 10-30 wt%, the loading capacity of each of the A metal elements is 0.01-0.05%, and the loading capacity of each of the B metal elements is 10-30 wt%. According to the preparation method of the catalyst, a traditional impregnation method and an electromagnetic field stirring technology are combined, and the prepared catalyst shows super-long stability and super-high activity in a reaction for preparing vinyl chloride through acetylene hydrochlorination.

The invention discloses an anti-static ceramic tile with a nano-structure on the surface, and a preparation method thereof. The method comprises the following steps: S1, preparing a weak acid with certain solubility according to the requirements of a microstructure on the surface of the ceramic tile; S2, uniformly spraying the weak acid on the surface of the ground and polished ceramic tile by adopting high-pressure atomization equipment, and carrying out surface microstructure modification; S3, cleaning and blow-drying the surface of the modified ceramic tile; S4, preparing an aqueous nano silicon dioxide solution doped with silver particles; S5, coating the surface of the modified ceramic tile with the aqueous nano silicon dioxide solution doped with silver particles in a coating mannerto form a film layer, and baking the film layer; and S6, after baking is finished, cooling to the anti-static ceramic tile. The method has the characteristics of being low in production technical difficulty, easy to implement and high in cost performance.

The invention discloses a circular knitting machine density regulating device with an inductive alarm mechanism, which comprises a driving mechanism, a transmission mechanism, a dynamic density triangular mechanism and a piston mechanism, wherein the driving mechanism, the transmission mechanism, the dynamic density triangular mechanism and the piston mechanism are all mounted on a triangular base; the driving mechanism drives the dynamic density triangular mechanism to move through the transmission mechanism; the driving mechanism comprises a density motor, a density motor frame and a driving cam; and the inductive alarm mechanism is mounted on the density motor frame and comprises a sensor hexagon nut, a sensor nut, a sensor pin and a sensor. When a pneumatic piston does not push the dynamic density triangular base to a perfect position, the sensor pin is separated from the front end face of the dynamic density triangular base, at the moment, the sensor connected between the sensor hexagon nut and the sensor nut is used for the inductive alarm.

The invention relates to the technical field of ventilation auxiliary windows, in particular to a solar-type ventilation auxiliary window. The solar-type ventilation auxiliary window comprises a flexible window screen, a window frame, heating net-shaped structures and louver blades. Heating net-shaped structure connecting shafts are arranged at the upper ends and the lower ends of the heating net-shaped structures correspondingly, and penetrating holes are formed in the two sides of the heating net-shaped structures in a protruding mode correspondingly. First connecting silks of the flexible window screen penetrate through silk penetrating pieces a of the flexible window screen to be connected with the two louver blades, and second connecting silks of the flexible window screen are connected with the window frame through silk penetrating pieces b of the flexible window screen and fixed to the penetrating holes in the heating net-shaped structures. A wire box is mounted at one end of areel, and a wire outlet is formed in the other end of the reel. A solar cell panel is electrically connected with heating pieces. According to the solar-type ventilation auxiliary window, solar heating can be utilized, safety and environmental friendliness are achieved, solar energy is utilized for providing electric energy for operation of a stepper motor, the purpose of noise reduction can be achieved, the sound insulation effect is good, and economic applicability is good.

The invention relates to a switch reluctance machine system for new energy internet. The switch reluctance machine system for new energy internet comprises a bidirectional DC / DC converter and an inversion unit, wherein the bidirectional DC / DC converter is connected between a DC bus and a storage battery pack, the inversion unit is connected between the DC bus and an AC load, an input end of a bidirectional DC inverter is connected with the DC bus, an output end of the bidirectional DC inverter is connected with the storage battery pack, the inversion unit comprises a front-stage DC / DC boost conversion circuit and a post-stage DC / AC inversion circuit, an input end of the front-stage DC / DC boost conversion circuit is connected with the DC bus, and an output end of the front-stage DC / DC boostconversion circuit is connected with the AC load via the DC / AC inverter. The switch reluctance machine system for new energy internet can be used for a DC load and the AC load, energy is stored by astorage battery when electric quantity is sufficient, the energy is provided by the storage battery when the electric quantity is insufficient, and energy flowing in the system is achieved.

In order to provide a treatment scheme for ammonia nitrogen in sucralose production wastewater, the inventors disclosed a method for recovering dimethylamine from sucralose production wastewater, including the steps of: salt and 1-5% N, N-dimethylformamide is added into the waste water of strong alkaline substances to obtain an intermediate product with a dimethylamine concentration of 10-30%; Dimethylamine solution. The technical scheme of the invention has low energy consumption, less investment, and can generate economic benefits. The dimethylamine is recovered while the ammonia nitrogen wastewater is being treated, and has strong practicability and good economic applicability for enterprises.

The invention provides a UGT enzyme activity detection method not used for disease diagnosis and treatment and application of the UGT enzyme activity detection method in screening and evaluating a UGT enzyme regulating agent. According to the detection method, radix ophiopogonis isoflavone A is used as a substrate, and the conversion rate of the radix ophiopogonis isoflavone A or the generation rate of a 7-O-glucuronic acid product of the radix ophiopogonis isoflavone A is quantitatively detected through a liquid-phase ultraviolet method or a liquid-phase mass spectrometry method so as to detect the activity of UGT enzyme. The method disclosed by the invention has the characteristics of high sensitivity, strong stability, good repeatability, simplicity, easiness in operation and the like; the method is used for screening and evaluating various reported UGT enzyme regulators, has extremely high accuracy and has a very good application prospect.

The invention discloses a solid filling gob-side entry retaining process system and a construction method in order to achieve direct entry retaining in the solid filling process. The solid filling gob-side entry retaining process system comprises a set of waste rock blocking and grouting equipment such as a set of self-made telescopic high-strength waste rock blocking plate, a filling material stirrer, a high-pressure grouting machine and a grouting pipeline system and cooperation of the waste rock blocking and grouting equipment in space and time. The gob-side entry retaining process system mainly comprises the steps of fixing the self-made waste rock blocking plate, conducting direct high-pressure grouting entry retaining and the like. The specific construction method comprises the stepsof waste rock blocking plate supporting, grouting material stirring, grouting pipeline inserting, high-pressure pumping operation and roadside body forming. According to the process method, the problems that a waste rock bag and other traditional supporting modes are complex in process and poor in effect can be solved, equipment, cost and workloads of independent filling entry retaining operationcan be reduced, goaf filling operation and entry retaining operation do not interfere with each other, that a goaf filling body and a roadside filling body are tightly connected can be kept, synergistically integrated and supported together, and the effect of achieving two purposes of filling and entry retaining is achieved.

The invention relates to the field of oil solvents, in particular to novel anti-rust oil and a preparation method of the novel anti-rust oil. In allusion to the problems that existing anti-rust oil is poor in anti-rust performance and film-forming stability during use, poor in corrosion inhibition, high in viscosity and poor in film-forming quality, the invention proposes the following scheme: the novel anti-rust oil comprises the following raw materials in parts by weight: 70-85 parts of base oil, 8-14 parts of a composite corrosion inhibitor, 5-7 parts of an alkaline solution, 2-5 parts of paraffin, 20-35 parts of a diluent, 20-35 parts of butyl cellulose, 1-3 parts of a film-forming agent and 1-2 parts of an antioxidant. The alkaline solution is doped to improve the anti-rust performance; the composite corrosion inhibitor is doped to improve the corrosion inhibition strength so as to enhance the anti-rust effect; the paraffin is doped to enhance the film-forming stability when the anti-rust oil is used; and by doping the diluent, the anti-rust oil has the characteristic of low viscosity and is easy to coat, the consumption of the anti-rust oil is reduced, and by cooperatively doping the butyl cellulose, the anti-rust oil is good in coverage and uniform in film formation.

The invention discloses a coal mine underground grouting drill rod and a using method in order to reduce the disturbance to broken rock and gangue in the process of pulling out a drill rod in the grouting and filling work of a drill rod first and a grouting pipe later, effectively solve the problem of hole blockage, facilitate underground grouting operation, and reduce grouting and filling procedures. The drill rod is mainly composed of a drill rod body, a one-way opening and closing device, a rotary connector, a protective cover, a drill bit and other members. The rotary connector is connected with the one-way opening and closing device and the drill rod body so that the one-way opening and closing device can be opened and closed; a small spring is arranged in the rotary connector so that the one-way opening and closing device can be always in a closed state in a natural state and a drilling process; and meanwhile the protective cover guarantees a movable space for rotary opening and closing of the one-way opening and closing device. The coal mine underground grouting drill rod is simple in structure and convenient to operate, drilling and grouting filling can be carried out while drilling is carried out in a broken top plate or caving the gangue, the tedious working procedures of two-time operation of arranging the drill rod and a grouting pipe are reduced, the hole blocking problem is effectively solved, and underground grouting operation is facilitated.

The invention discloses a preparation method for a doped-element-free black oxide film of a titanium surface. The surface of a titanium part is subjected to sand blasting treatment so that the roughness Ra of the surface can be greater than or equal to 0.4 microns, then degreasing and acid pickling are conducted, and the titanium part subjected to acid pickling is arranged in an anodic electrolyteand used as an anode for direct current anodizing treatment; the anodic electrolyte comprises organic acid and inorganic salt; the direct current anodizing treatment adopts a gradient gradual pressure rise mode; and after treatment is completed, a black sample is obtained, that is, the doped-element-free black oxide film is formed on the surface of the titanium part surface. Through the preparation method, other elements except a matric are not introduced to the surface of the titanium part, and the surface is good in stability, high in color fastness and good in biocompatibility.

The invention relates to a welding operation, in particular to a welding baffle and more in particular to an easily-dismountable welding composite baffle. The easily-dismountable welding composite baffle comprises a steel plate, wherein a groove gap is formed in the middle of the steel plate; two sink holes are formed in each of the two sides of the groove gap; strong magnets are embedded into the sink holes; 8-10 air outlets are uniformly distributed in the bottom surface of the groove gap; and fire clay is applying to the groove gap and dried. According to the easily-dismountable welding composite baffle, a welding arc strike and blowout plate is replaced, the welding efficiency is improved, and the material is saved.

The invention discloses greenhouse temperature and humidity adjusting equipment based on melon, fruit and vegetable planting. The equipment comprises a greenhouse, an air inlet pipe and an air outletpipe are inserted into the greenhouse, the air inlet pipe and the air outlet pipe are located at the two ends of the greenhouse respectively, an atomization device is arranged at the side, close to the air inlet pipe, of the greenhouse, and the output end of the atomization device is connected with a connecting pipe; the connecting pipe is fixedly connected to the air inlet pipe, the atomizing device is connected with a water supply pipe, a mounting frame is arranged at the side, close to the air outlet pipe, of the greenhouse, a circulating fan is fixedly mounted on the mounting frame, the air inlet pipe and the air outlet pipe are both connected to the circulating fan, and the circulating fan is connected with refrigerating and heating devices; and the refrigerating and heating devices are fixedly mounted on the mounting frame. The temperature and humidity in the greenhouse can be adjusted by blowing air into the greenhouse through the circulating fan, and the equipment is simple instructure, convenient to operate, lower in manufacturing and using cost, well in economic applicability and suitable for application and popularization.