297results about How to "Strong maneuverability" patented technology

The invention discloses a method for recycling a metal oxide from a waste flue gas denitration catalyst, comprising the following steps of: crushing the waste flue gas denitration catalyst to carry out pre-roasting pretreatment at high temperature; adding Na2CO3 into the waste flue gas denitration catalyst according to the proportion, mixing, pulverizing and roasting at high temperature to obtain a sintering block; crushing the sintering block and putting the crushed sintering block into hot water, and stirring and lixiviating to obtain titanate; adding sulphuric acid into the titanate, filtering, water-washing and roasting to obtain TiO2; adding the sulphuric acid into the lixiviated filtering liquid to regulate a pH value to 8.0-9.0; adding excessive NH4Cl for vanadium precipitation; decomposing NH4VO3 obtained from filtering at high temperature to prepare a V2O5 product; adding hydrochloric acid into the filtering liquid subjected to the vanadium precipitation to regulate a pH value to 4.5-5.0; adding CaCl2 for molybdenum and tungsten precipitation; treating the CaM0O4 and CaWO4, obtained from filtering, with the hydrochloric acid and roasting to obtain MoO3 and WO3. The method of the invention has the advantages of simple process and apparatus, high recycling efficiency, good product technical data, large treatment capacity and the like.

The invention provides a method for realizing fast and automatic modeling of a transformer substation IEC 61850 by adopting XML information recombination, which is applied to IED modeling of space layers in a digital transformer substation and a traditional transformer substation by adopting IEC 61850 communication. The method comprises the following steps of: recombining the IED information by adopting XML, and providing an IED information standardization interface; editing and setting the standardized XML files; loading an embedded minimum model which accords to the IEC61850 standard; appointing an sAddr information format in advance, automatically adding sAddr information and leading out an ICD model file; analyzing the led-out ICD model file by the IED, and automatically extracting the sAddr information, and automatically mapping model leafage nodes to a real-time database according to the sAddr information; and enabling the information of the real-time database to normally communicate with station control layer equipment by the IED through adopting an IEC61850 protocol. The model collocation can be set by engineering personnel according to actual engineering. Therefore, the invention greatly shortens the time for generating the IEC61850 model, improves the efficiency of production and regulation and is convenient for 61850 engineered actualization and generalization.

The invention discloses a loach fish fry artificial propagation method. The loach fish fry artificial propagation method comprises the following steps: parent fish rearing and selecting; artificial induction; fertilization process; and fertilized egg hatching process. The loach fish fry artificial propagation method can excellently improve induction rate, fertilization rate and hatching rate, and especially improves post-natal survival rate of the parent fish. The loach fish fry artificial propagation method can achieve loach fish fry industrialized production, provides offspring seeds for large-scale farming, and acquires excellent economic efficiency, by using the loach fish fry artificial propagation method the post-natal survival rate of the parent fish is 90.87 percents, increasing by 40.87 percents; the induction rate is 91 percents, increasing by 11 percents; the fertilization rate is 96.67 percents, increasing by 1.67 percents; and the hatching rate is 91.07 percents, increasing by 11.07 percents.

The invention discloses a method for cultivating asparaguses in North China. The method comprises the following steps: selecting soil conditions and seeds, growing seedlings, sowing, field planting, managing after field planting and controlling pests. Compared with the prior art, the method of the invention systematically provides a complete set of technological measures for cultivating asparaguses in a modeled manner, has strong operability and is convenient to use. The cultivating effect is stable and reliable, and the quality of the asparaguses is guaranteed, because the method is based on the related agricultural climate conditions and the characteristics of growth and development of the asparagus plant.

The invention relates to a construction method of a bearing frame of a corridor structure. The construction method is realized by adopting a platform-type structural steel combination force bearing platform, and erecting full scaffolds on the platform for supporting a template. According to the construction method disclosed by the invention, corbels which are arranged on a shear wall and columns in design and are specially used as structural steel holding points are utilized for erecting full load bearing frames. A platform-type template bearing system is provided with four layers of frame bodies in total, is formed by combining a template supporting load bearing system built at the first two layers and an operation and protection platform built at the next two layers, and is a novel innovative template supporting load bearing system with strong operability, higher safety and shorter construction period.

The invention discloses a 3D printing method of composite parts based on a three-cylinder former. The method includes the steps of designing a part model with 3D software; based on the 3D model, marking parts of different materials, applying same marks to parts of same material, and applying different marks to parts of different materials; slicing and layering the 3D model; pre-storing required powder material in each powder cylinder of a 3D printer, controlling a system of the 3D printer according to outlines of slices of the 3D model, controlling two feed cylinders to feed the powder to a forming cylinder, and laser-melting and sintering the powder to finish one layer; controlling to descend the forming cylinder by one layer thickness, repeating the step of powder spreading, stacking layer by layer, and completing 3D printing of composite once directly. The method has the advantages that part structures are lightened and structure attributes and function attributes are combined by making full use of excellent performances of metal materials and nonmetal materials.

The invention provides a cold-patch asphalt modified liquid and a production method thereof. The cold-patch asphalt modified liquid comprises the following components by weight: 5-8% of one or a mixture of butadiene styrene rubber (BSR) and styrene-butadiene-styrene (SBS), 3-5% of naphthenic oil, 3-5% of glycerol, 3-5% of dibutyl ester, 0-3% of an anti-stripping agent and the balance of heavy diesel oil. The production method of the asphalt modified liquid comprises the following steps: (1) screening an asphalt modifying agent through an oscillating screen with sieve pores of 0.6cm, and clearing away caking; (2) adding the asphalt modifying agent and the heavy diesel oil into a stirrer in proportion for stirring for 3-4 hours until the asphalt modifying agent is completely and uniformly dispersed in the diesel oil and turned into a light brown paste; and (3) adding the naphthenic oil, the glycerol, the dibutyl ester and the anti-stripping agent in proportion, together stirring the added components for 30-40 minutes, and then storing for later use. The cold-patch asphalt modified liquid has the advantages of long storage period, good operability, simple production process, abundant material resource, environment friendly production, convenience in use, and the like.

The invention discloses a flame tube head assembly brazing method and belongs to the technical field of aero-engine part manufacturing. In a brazing method of a traditional flame tube head assembly, an assembly substrate at a positioning welding point is oxidized due to the fact that a tube front section and a splash pan are positioned through argon arc welding, so that during brazing, brazing filter metal cannot moisten the substrate at the positioning welding point, the brazing seam is not continuous, and a design requirement of a continuous brazing seam cannot be achieved, and after brazing, a cold air hole is blocked by the brazing filter metal, the brazed rate between a sleeve and a swirler cannot achieve a design requirement of more than 80%. The flame tube head assembly brazing method has the advantages that the assembly substrate at the positioning welding point is avoided from being oxidized due to positioning through energy storage spot welding, enabling the paste brazing filter metal to moisten the substrate at the positioning welding point and guaranteeing the continuous brazing seam design requirement; enabling a to-be-welded position on the internal side of the sleeve to satisfy the brazed rate requirement and avoiding the brazing filter metal blocking the cold air hole during the brazing process due to the fact that check soldering flux pains inside the cold air hole; the operability is strong and production costs are obviously reduced.

The efficient biochemical fulvic acid preparing process is to utilize, enrich and culture humic acid producing bacteria and auxiliary bacteria existing in nature to form specific fulvic acid producing bacteria. The fermented material includes crop stalks, saw dust and other agricultural and forest waste and some inorganic nutrient components as well as fulvic acid producing bacteria, and through controlling nutrients compounding ratio, water content, temperature, humidity and other technological parameters, fulvic acid is produced through directional fermentation. The present invention has the advantages of short fermentation period, low cost, high fulvic acid content, high product quality and easy control of the production process. The fermented product contains great amount of fulvic acid, amino acid, nucleic acid and other matters, and may be used widely in plantation, stockbreeding, aquiculture, industrial fermentation, medicine, pesticide and other industry.

The invention relates to a metal defect detection method of a laser-electromagnetic ultrasonic nondestructive testing system. The method adopts the laser-electromagnetic ultrasonic testing system composed of a pulsed laser, a linear focusing unit, a transverse wave electromagnetic ultrasonic sensor, a three-dimensional mechanical stepping device, a signal amplification filtering system, a digital oscilloscope and a computer. The system is utilized to excite a Gaussian laser pulse, which is then delivered to the surface of a metal material through an optical focusing system, and at the same time surface waves as well as transverse waves are excited. The transverse wave electromagnetic ultrasonic sensor is used for receiving, and on the basis, positioning detection of the surface and near surface defects can be performed. The method makes use of the transverse wave electromagnetic ultrasonic sensor to receive diffraction transverse waves generated when the transverse waves encounter an internal defect, and when the sensor is position right above a metal material internal defect, the received diffraction transverse wave signal has the strongest amplitude, so that the horizontal position of the defect can be determined, and the vertical position of the defect can be determined by the defect echo time. The method can realize detection of metal material surface, near surface and internal defects at the same time.

A method for restoring and recultivating the vegetation of Aneurolepidium Chinese on the soda-type saline-alkaline land includes choosing the seedlings of Aneurolepidium chinese, plough by 5-15 cm in depth, flood irrigation, leveling, making ridges or beds, transplanting by a certain density, and irrigation.

The invention discloses a karst area soil nutrient reserve sampling and calculating method. The method comprises the steps that: (1) a dry land is selected at a karst area; (2) the sample land is divided into small samples, and soil augers are firmly drilled into soil in every network; (3) a soil profile stratified sample is dug from every land sample according to soil average thickness, and soil unit weights are determined by using cutting rings; (4) the soil samples are naturally air-dried in a shade, and are filtered; plant roots in soil samples in the cutting rings are removed, washed by using clear water, and bake-dried to constant weight; and the plant roots are weighed, such that root biomasses are obtained; (5) according to a soil organic carbon content and soil unit weight relationship scatter-plot established according to ecosystem soil profile data, organic carbon contents are determined, and soil unit weights are calculated; (6) soil nutrient densities are calculated according to soil volumes; and (7) according to soil nutrient densities of the samples of the ecosystem, unit-area soil nutrient reserve is obtained. The method is simple, easy, convenient, time-saving and labor-saving, and has high operability. With the method, karst area soil nutrient reserve data can be accurately obtained.

The invention belongs to the technical field of geological exploration, and specifically relates to a method for identifying and locating a deep favorable ore-forming space of a granite-type uranium mine. The invention aims to provide a method for identifying and locating a deep favorable ore-forming space of a granite-type uranium mine so as to provide a basis for the delimitation of a uranium ore-forming favorable section of the granite-type uranium mine in allusion to the deficiencies of the prior art. The technical scheme of the invention comprises the steps of 1, deducing the deep uraniummineralization scale according to a geological method, and identifying a deep favorable ore-forming space; 2, deducing deep extension of known fault structures and buried fault structures by using anaudio magnetotelluric and high-precision magnetic measurement geophysical method, and detecting a deep favorable ore-forming space; 3, detecting deep uranium mineralization information by using a partial content geochemical exploration method and a soil thermoluminescence method, and providing identification information of the deep favorable ore-forming space; and 4, realizing identification andlocation for the deep favorable ore-forming space according to the identification in the step 1 for a deep ore-forming mark of the typical ore deposit by combining three-dimensional anatomy of the deep favorable ore-forming space and adopting location for the deep ore-forming environment according to audio magnetotelluric sounding and high-precision magnetic measurement in the step 2 and deep ore-forming information detected according to partial content geochemical exploration and soil thermoluminescence in the step 3.

The present invention provides a method, system and equipment for evaluating the needs of elderly care, wherein the method includes: S1, obtaining the evaluation results of various second-level indicators; S2, obtaining the corresponding first-level index evaluation results according to the evaluation results of the second-level indicators The first-level indicators include "cognitive function", "emotion", "mental behavioral problems", "audio-audio and communication", "basic activities of daily living", "instrumental activities of daily living", "health status" and "Social living environment"; S3, according to the evaluation results of the first-level indicators, obtain the elderly care service demand items and the elderly care level. The invention provides a method, system and equipment for assessing the needs of elderly care, the assessment items are simple and easy to understand, and the operability is strong, which objectively and clearly reflects the needs of elderly care services, and is useful for guiding the service quality of elderly care service institutions. The improvement has important theoretical and practical significance.

The present invention relates to the field of material science, and aims to provide a preparation method for a grapheme-molybdenum disulfide-polyaniline ternary composite electrode material. The method comprises the steps of dispersing graphene in deionized water, then dispersing molybdenum trioxide and potassium thiocyanate in deionized water, uniformly mixing up the above material, subjecting an obtained mixture to hydrothermal reaction, washing and drying an obtained precipitate to obtain substrate powders, placing substrate powders in dilute acid for ultrasonic dispersion, adding aniline monomer and an oxidizing agent, stirring uniformly, reacting at the room temperature, filtering, washing, and drying to obtain the ternary composite electrode material. The preparation method is simple in process and strong in operability. The temperature of the synthesis condition is wider in range, and the requirement on the substrate material is lower. Therefore, the preparation method is more suitable for industrial production. In the preparation field of super capacitor electrode materials, the preparation method has a wider application prospect. Based on the preparation method, electrode materials of uniform morphology and good electrochemical performance can be prepared. Meanwhile, a high electrical double-layer capacitor and a pseudo capacitor can be obtained simultaneously. As a result, the cycle performance is more excellent.

The invention discloses a student exercise guidance system. The system comprises a registration / login module, an exercise record module, a physical fitness evaluation module and an exercise guidance scheme module, wherein the exercise record module calculates an exercise amount of a student according to an exercise target set by a student user and an input daily physical activity, determines an exercise standard reaching condition and feeds back to the student user; the physical fitness evaluation module grades and evaluates a physical fitness index of the student, and carries out an index superior and inferior situation diagnosis so as to generate different versions of physical fitness evaluation reports; the exercise guidance scheme module selects an exercise guidance scheme in a targeted mode from an exercise guidance scheme database according to a health file of the student and the index superior and inferior situation in each physical fitness evaluation report and displays on a terminal as a text, video or picture form. In the exercise guidance system, through making a scientific exercise guidance scheme, the student is effectively guided to carry out scientific exercises so as to enhance physical fitness.

The invention relates to a deciduous wood P-RC APMP (pre-conditioning refiner chemical pretreatment alkaline peroxide mechanical pulp) pulping process using magnesium alkali, and provides a pulping process of the deciduous wood P-RC APMP; and the pulping process takes magnesium oxide as an alkali source and is economically feasible. According to the method, the magnesium oxide with higher purity (more than 85%) is adopted, a suspending liquid is prepared in a dissolution tank with mechanical circulation and stirring, and is added in a proper position (a slurry-spraying pipe) of a P-RC APMP pulping process pipeline, a suitable pH (potential of hydrogen) value environment is provided, and finally, fine-performance high yield pulp fibre is prepared.

The invention relates to an accurate pre-distribution method of railway multi-type catenary hanging strings. The contact suspension has a plurality of types, the concentrated load distribution is nonuniform, the hanging string pre-distribution accuracy is directly influenced by complex line conditions, the pre-distribution methods are not uniform for hanging string pre-distribution programs of different suspension types, the operation is complex, and the field test period is long. The accurate pre-distribution method comprises the steps of standardizing the pre-distribution processes of catenary hanging strings of a plurality of types; acquiring design line-related data, design line vertical curve factor data, and hanging string pre-distribution measuring data; and inputting the design line-related data, inputting the design line vertical curve factor data for pre-distribution supplementation calculation, inputting the hanging string pre-distribution measuring data, establishing different calculation models according to different catenary working condition types, establishing a global stiffness matrix and a load matrix, forming a multidimensional linear equation set through combination, and solving to acquire an initial hanging string pre-distribution calculation result. According to the accurate pre-distribution method, the operability is high, the method integration level is high, the calculation speed is high, and the method is applicable to pre-distribution of rigid and flexible whole hanging strings.

The invention provides a zinc oxide micro-nano array and a preparation method thereof. The method includes steps that firstly, water solution containing Zn(NO3)26H2O and (CH2)6N4 is prepared; secondly, a substrate is prepared, metal zinc is arranged on the surface of a silicon wafer by means of thermal evaporation while oxygen is fed, a zinc oxide film is formed by means of reaction, or a zinc oxide film is formed by means of evaporation by a magnetic sputtering method, after the substrate is cooled, photoresist is sprayed on the film, local electron beam lithography is carried out on the photoresist, and a channel array is obtained; and thirdly, the substrate prepared in the second step is soaked in precursor solution prepared in the first step for 1 hour to 12 hours, and then is taken out and dried by nitrogen after being cleaned, and a zinc oxide array is formed. By controlling reaction conditions, controllable regulation of the diameter of a single zinc oxide line on a zinc oxide nano harness aggregate can be realized.

The invention relates to a method for repairing soil contaminated by the heavy metal cadmium and specifically to a method for applying paddy rice with high accumulation of cadmium in repairing soil contaminated by the heavy metal cadmium. The method comprises the following steps: 1, planting paddy rice seedlings in soil contaminated by cadmium; 2, managing the seedlings as managing a conventional big field; 3, harvesting the whole plant of the paddy rice; 4, burning and ashing the harvested paddy rice; and 5, extracting the heavy metal from an ashing product of the paddy rice. According to the invention, since the paddy rice with high accumulation of cadmium has accumulation characteristic to cadmium, the paddy rice is planted in soil contaminated by cadmium to absorb and accumulate cadmium and to transfer most cadmium to the aboveground part of the paddy rice, thereby achieving the purpose of repairing soil.

The invention discloses a construction method of a shock-isolation rubber support. The construction method comprises the following steps: 1) binding a lower buttress with a steel bar; 2) arranging a positioning steel plate; 3) arranging a sleeve and an anchor bar; 4) pouring concrete below a shock-isolation layer floor; 5) erecting a side formwork for the lower buttress and pouring concrete; 6) arranging the shock-isolation rubber support; 7) retesting the shock-isolation rubber support; 8) erecting a side formwork for an upper buttress; 9) binding the upper buttress with a steel bar; and 10) pouring concrete on the upper buttress, particularly, pouring concrete on the upper buttress, a beam, the plate, the side formworks and the steel bars simultaneously after the upper buttress, the beam, the plate, the side formworks and the steel bars passing examination. The construction method has the beneficial effects of being simple and feasible, and strong in operability; during the construction of arranging the shock-isolation rubber support, the bottom of the shock-isolation rubber support is easy to achieve complete compactness, and the project quality is enhanced; the construction progress is accelerated, and the construction capability of a construction unit is improved, thereby bringing good economic benefit for enterprises.

The invention discloses a KJAVA application program management system for embedded equipment, which is characterized in that the system comprises a database service module, a KJAVA application program management module and a network transmission module which are connected in turn; the database service module is used for interacting with a database on the embedded equipment and reading data out from the database or writing data into the database; the KJAVA application program management module is used for managing KJAVA application programs; and the network transmission module is used for communicating with a network server.

The invention discloses a microwave photon mirror image rejection down conversion device and method; the method relates to the microwave technical field and the optical communication technical field; the device comprises a laser diode (LD), a dual-parallel Mach-Zehnder Modulator (DPMZM), a wavelength division multiplexer (WDM), a photoelectric detector (PD) and a quadrature coupler (Hybrid). The method uses the DPMZM to modulate a radio frequency (RF) signal and a local oscillator (LO) signal; the main modulator bias angle is set to be 45 degrees; the method uses the WDM to separate up and down optical margin belts, and an intermediate frequency (IF) signal inhibiting a mirror image frequency component can be obtained through photoelectric detection and Hybrid coupling. The microwave photon mirror image rejection down conversion device is simple in structure, wide in work frequency band width, and high in mirror image rejection ratio.

The invention discloses an electrolytic solution used for molybdenum gate screen electrolytic polishing and a preparation method thereof, and application thereof to the molybdenum gate screen electrolytic polishing process. The electrolytic solution consists of the following raw materials: 400 to 450 ml of phosphoric acid, 150 to 200 ml of sulfuric acid, 40 to 60 g of nickel sulfate and 150 to 200 ml of water. Experiment researches show that each ingredient of the electrolytic solution has scientific and reasonable proportion, and can be perfectly used for the electrolytic polishing process of molybdenum gate screens and the like. The molybdenum gate screen electrolytic polishing method of the invention has the advantages of strong operability and good electrolytic polishing effect, and can perfectly remove the burr on the surface of the molybdenum gate screens particularly under the preferable process parameter conditions such as the electrolytic voltage, the time, the temperature and the like, so the quality of the molybdenum gate screens can be improved, the striking rate is obviously reduced after the molybdenum gate screens are assembled to traveling wave tubes, and the performance of the traveling wave tubes is improved.

The invention belongs to material preparation technical field, in particular to a method for preparing composite Li-ion battery cathode by an electrodeposition technology. The method comprises the following steps of: preparing and scraping polymer casting solution on the surface of clutch gold; conducting humidification treatment on the polymer casting solution by a humidifier or conducting phase inversion in non-solvent until phase inversion occurs in the polymer casting solution and micro porous membrane is formed; making use of the electrodeposition technology to allow tin or tutania to deposit on the surface of the clutch gold; conducting thermal treatment on the clutch gold with the protection of idle gas to obtain a Li-ion battery composite cathode electrode tab. The composite materials prepared with the method can satisfy the application of Li-ion battery cathode, is strong in operability, low in cost, convenient for electrode preparation, high in specific capacity and long in cycling life.

The invention provides a method for preparing a nano-silver-based dual-curing dental antibacterial adhesive. The method comprises the following specific steps: (1) preparing monodisperse spherical nano SiO2 particles by using a Stober method; (2) generating nano silver particles with small particle sizes on the surfaces of the nano SiO2 particles by utilizing a reduction reaction of an ammonia silver nitrate solution, namely preparing a nanoscale silver-loaded inorganic antibacterial agent; (3) performing proper surface modification on the previous silver-loaded inorganic antibacterial agent; and (4) preparing the optical and thermal dual-curing dental adhesive, and adding the inorganic antibacterial agent. The dental adhesive prepared by the invention has the multiple advantages of simple and feasible preparation process, product system stability, high operability, excellent antibacterial performance, durability and the like and has high clinical application potential.

The invention relates to a sweet potato drought tolerance identification method, and in particular relates to an indoor auxiliary sweet potato drought tolerance identification method, belonging to the technical field of sweet potato drought tolerance identification. The method comprises the following steps: by selecting a test tube seedling stem section which is subjected to subculture for more than or just 50 days as an explant, cutting a single section, inoculating the explant into a high-permeation identification culture medium, performing inoculation treatment for 30 days, subsequently surveying the relative root growth number coefficients of different varieties, and judging the drought tolerance grade of the varieties according to the relative root growth number coefficients of different varieties, wherein the drought tolerance of the variety of which the relative root growth number coefficient is greater than or equal to 1.0 is high, the drought tolerance of the variety of which the relative root growth number coefficient is greater than 0.5 and less than 1.0 is medium, and the drought tolerance of the variety of which the relative root growth number coefficient is smaller than or equal to 0.5 is relatively poor. The method is simple to operate, is flexible and convenient and applicable to screening on a great number of materials, can relieve the workload of field drought tolerance identification and can improve the working efficiency.

The invention relates to an acetic acid atosiban, and a method for detecting content of preparation of acetic acid atosiban and relevant substances. The detection method is an efficient liquid-phase chromatography method, which comprises the following chromatography conditions that a chromatographic column takes octadecylsilane chemically bonded silica (C18) as filling agent; 0.05mol/L phosphate buffer solution is taken as mobile phase A and acetonitrile as mobile phase B to carry out gradient elution; a detection wavelength ranges from 205 to 225nm; the flow speed ranges between 0.8 and 1.2ml/min and the concentration of a prepared sample ensures that each milliliter of the sample contains 0.1 to 15mg of polypeptide; and the sample size is controlled between 5 and 200mu l. The efficient liquid-phase chromatography method can accurately detect a sample and the content of impurities of the sample at the same time and realizes complete sample separation during analysis and ideal reproducibility of analysis result, thereby providing a simple and reliable method for quality control and analysis during production process.

The present invention discloses a processing technology of high moisture shredded squids. The processing technology comprises the following steps: (1) raw material pretreating; (2) fishy smell removing; (3) curing; (4) seasoning and penetrating; (5) squid slice arranging and drying; (6) fragrance improving; (7) rolling and shredding; and (8) weighing and packaging. The processing technology of the high moisture shredded squids is optimized and improved, especially the steps of the fishy smell removing and fragrance improving are increased, and the steps of the curing and seasoning and penetrating are optimized. At the same time, the recipes of fishy smell liquid, seasoning materials and fragrance improving liquid are provided or improved. The whole technology is simple in steps, and the processing technology requires no special equipment and is strong in operation and high in efficiency. The obtained products are excellent in appearance, flavor, texture and taste.

The invention discloses an adjustable straightening device for fruit tree planting in agriculture and forestry. The adjustable straightening device comprises a first fixing semi-ring plate, a second fixing semi-ring plate, a screw rod, a first tree clamping plate and a second tree clamping plate, wherein the first fixing semi-ring plate is connected with the second fixing semi-ring plate to form an annular structure; the upper side surface of the first fixing semi-ring plate and the upper side surface of the second fixing semi-ring plate are separately provided with a sliding groove; the sliding groove in the first fixing semi-ring plate communicates with the sliding groove in the second fixing semi-ring plate; the first fixing semi-ring plate and the second fixing semi-ring plate are separately connected with inner threaded pipes in a symmetrical manner; and one end of each inner threaded pipe is separately hinged to the first fixing semi-ring plate or the second fixing semi-ring plate. By adopting the adjustable straightening device, straightening heights can be adjusted freely according to inclining positions of fruit trees; besides, straightening directions and straightening angles can be adjusted flexibly; compared with a current binding-type straightening device, the adjustable straightening device has the advantages that the adjustable straightening device is more flexible, higher in operability and easy to dismantle, and can be adjusted freely along with growth of the fruit trees.