84results about How to "Suitable for field application" patented technology

The invention relates to a fixed burning source emission particulate sampling system, which comprises an off-gas inlet system, a second diluter, a setting house and a sampling system positioned on the lower part of the setting house. It arranges a compressed air system on the first diluter and a sampler outlet with gas flow gauge and a superfluity gas outlet with gas flow adjusting valve on the outlet end; it arranges a dilution air supplying system and a gas flow gauge on the outlet of the second diluter and a plurality of pressure balance holes around the lower part of the setting house.

The invention discloses a compound water soluble fertilizer used for citrus crops, a preparation method and an application method. The compound water soluble fertilizer used for citrus crops is mainly used in plant nutrition field, and comprises the following components: an amino acid raw material, macroelements P and K, secondary elements Mg and Ca, trace elements Fe, Mn, Zn, B, Mo and Cu, a beneficial element Si, an auxiliary agent, a PH conditioning agent and an aqueous solution. The preparation method is characterized in that composite amino acid chelates Mn, Fe, Cu, Mg, Ca and Zn at normal temperature of 15-35 DEG C and prepares the water soluble fertilizer with six metallic elements, the reasonable fertilizing can be carried out at different growth period of the crops, the balance supplement of a plurality of nutrient elements required by citrus crops can be realized, and the output and quality of the citrus crops can be increased.

The invention discloses a directional rock blasting crack propagation method and a directional rock blasting crack propagation device. The directional rock blasting crack propagation device consists of kerf pipes and explosive, wherein each kerf pipe is symmetrically provided with double kerfs along the longitudinal wall. During directional blasting of peripheral blast holes of a roadway or presplit blasting of an open pit slope, the kerf pipes and the explosive are filled in the blast holes to finish directional crack blasting, wherein an included angle of the kerf direction and the presplit blasting outline direction is less than 150 degrees. The energy of the explosive is preferably released along the kerf direction in a centralized way, so that a blasting fracture surface is accurately controlled, the number of blasting cracks in other directions such as a surrounding rock, a slope and the like is greatly reduced, the length for the blasting crack propagation in the direction to be protected is limited, the production efficiency is high, and the construction cost is low; the device has a simple overall structure and is convenient to use, and is particularly suitable for directional controlled blasting of a rock gangway, a tunnel and the slope.

The invention provides a shale compressibility comprehensive evaluation method based on uniaxial strength experiment. The method comprises the steps of (1) taking a shale core sample for executing uniaxial compressive strength test, testing an elasticity parameter, and drawing a stress-strain curve diagram; (2) calculating normalized elasticity modulus and normalized poisson ratio to obtain a brittleness index; (3) obtaining key points on the stress-strain curve, and calculating the shape index of the stress-strain curve; (4) obtaining fracture distribution diagram of the side face of the fixed sample, and calculating a fracture distribution index through box-counting dimension method; (5) measuring spallation fragment mass distribution at different scales through a screen and a balance so as to obtain a block distribution index; and (6) calculating arithmetic mean value of the obtained brittleness index, shape index of the stress-strain curve, fracture distribution index and block distribution index of fragments to get the comprehensive compressibility index. The method provided by the invention is used for evaluating fracture net forming capability of the shale after being compressed, the experiment is simple and easy to carry out, and post treatment is visual and simple, so that the method is suitable for indoor evaluation and oilfield in-site application.

The invention relates to a fault recording data-based power system disturbance occurrence time identification method and belongs to the power system dispatching automation and power grid simulation technical field. The method includes the following steps that: a CUSUM algorithm is adopted to perform mutation data preliminary identification so as to obtain intervals in which signal mutation exists and alarm time points corresponding to each of the intervals; a waveform similarity test threshold value is set according to actual situation or experience, and similarity test is performed on waveform intervals in which continuous mutation exists, if a test result is greater than the threshold value, it can be determined that mutation of different degrees exists in two signal intervals, and identification is needed to be performed, otherwise, a latter mutation alarm signal is a false alarm signal and is deleted; and finally, a BG algorithm is adopted to perform fine identification on the intervals in which data mutation exists, and a mutation point with a most obvious mutation effect before an alarm time point is selected as a disturbance occurrence time point. The method of the invention is advantageous in simple implementation, fast calculation speed and suitability for field application.

The invention relates to a hysteresis loop measuring method of a current transformer. The hysteresis loop measuring method includes steps of (1) boosting and reducing voltage of a secondary coil of the current transformer slowly by working-frequency voltage before measuring hysteresis loop, so as to demagnetize the iron core of the current transformer to ensure it in the zero-flux state; (2) testing excitation characteristics of the current transformer by 0.5 Hz low-frequency voltage source, and integrating voltage and time in real time so as to obtain a magnetic flux curve of the iron core of the current transformer; (3) measuring the magnetic flux curve of the current transformer under the 0.5 Hz voltage and drawing the hysteresis loop, and reading remanence coefficient of the current transformer on the hysteresis loop, so as to obtain accurate and reliable measuring results of the remanence coefficient. The hysteresis loop measuring method is an effective method for measuring hysteresis loop of the current transformer and is accurate, reliable and convenient to operate, accurate and reliable data can be quickly acquired, and the required instruments are small and portable and very applicable to the field.

The present invention discloses a welded member fatigue stress and strain real-time non-contact type monitoring method. According to the method, the welded member welding seam and a certain surrounding area are subjected to grid division with a certain interval, each grid intersection point is adopted as an infinitesimal body as the stress and strain analysis unit, the feature information of the pixel points of all infinitesimal bodies in the area to be measured during the fatigue load acting process are extracted through a machine vision monitoring system when the fatigue load acts on the member, the collected member image is subjected to pixel point matching, the relation between the stress and strain change law and the image feature is established so as to obtain the feature change of the infinitesimal body during the fatigue load acting process, and finally the strain value and stress distribution law and the stress strain evolution law during the fatigue process are obtained. The method of the present invention is used for solving the monitoring problem of the stress and strain status distribution and evolution law of the welded member in the steel structure under the fatigue load acting.

The invention discloses a kit and a detection method for determining the copper ion concentration in a water environment. The kit comprises a B1 solution, a color comparison tube, a glass graduated pipette, a copper standard color scale solution, and a copper standard color scale or copper standard color comparison card. The kit is advantage in simple preparation method, low cost, good B1 solution stability, high extraction rate, low detection time, no requirement on other experimental equipment and professional and technical personnel, easy implementation, convenient carrying, and suitability for on-site detection of visual colorimetry. Main reagents in the kit are provided in forms of working fluids, and are packaged independently. The reagents are easy to preserve, and are suitable for on-site applications. According to the detection method, a reaction is fast. Under room temperature, only 7-10 minutes are needed from sample treatment to detection result acquiring. All organic phases of the method are not soluble in water, such that waste liquids can be separated and recovered after detection, and can be processed and reused. Therefore, no secondary pollution is caused, and requirements of modern detection technologies are satisfied.

The invention provides an experiment method for evaluating the shale fracturing crack mesh forming capability. The method comprises the following steps that: (a) a section of sleeve ring is intercepted from an oil field standard sleeve, and a shale core is selected and is processed into a cylinder test piece; (b) the shale core is placed into the sleeve ring, and an annular space formed by the shale core and the sleeve ring is filled with cement slurry; a hole is drilled in the center part of the shale core after the cement is hardened; and soundless breaking agent slurry is added into the drill hole; (c) the fractal dimension of the crack structure surface trace length distribution, the surface density and the crack number are used for carrying out quantitative characterization on the crack form of the pressed shale core surface, and the size and the number of breaking fragments are evaluated; and (d) a cement ring is dismounted, the crack number inside the pressed shale core, the bulk density and the size and the number of the fragments are obtained. The experiment method integrally reflects the brittleness of the shale and the natural crack system (and deposition stratification) characteristics, and is used for judging the crack mesh forming capability of the pressed shale; visualized effects and reliability are realized; in addition, the operation is simple; and the experiment method is suitable to be applied in an oil field site.

The invention relates to the oil-gas geological field, in particular to the analysis on rock core for well drilling and prospection. First, a rock core sample is crushed and placed into a test cylinder, soaked by some de-ionized water, the concentration of Cl ion in the leaching liquid is determined, then the water saturation of the rock core is calculated by a formula. The invention is easy to operate, rapid to analyze, can meet the requirement for rapid analysis on water saturation at the drilling and prospecting site, and is of important meaning for in-situ rapid identifying and evaluating oil-gas layer, improving the compliance in explanation of oil-gas water layer. The invention is for prospecting oil and gas fields.

The invention relates to a rock core water-bearing analysis method, in particular to an analysis of drilling well exploration rock core, belonging to oil gas geological technical field. The method comprises that breaking a rock core sample to be arranged into a test barrel, adding deionized water into the test barrel to submerge the rock core sample, sealing the test barrel, immerging the sample at normal temperature, using a test machine to find the mineralization rate K of the immerge liquid. The invention uses conductivity detect technique, to simplify the analysis process via rock core water-bearing saturation analysis processes and calculation equation, to quickly obtain the water-bearing saturation via little devices, while the chemical agent has reduced consumption, non toxicity, non damage on operation, non special protection demand, and non environment pollution. And the invention has quick analysis, with only one device, simple calculation, non special demand on operation and worker, and the application for rock core water-bearing quick analysis at drilling site.

The invention provides an ion mobility spectrometer and a carrier gas flow control method thereof. The ion mobility spectrometer comprises a migration tube used for completing ion migration, an ionization source used for generating reagent ions, a sample introduction device used for conveying a sample gas into the migration tube, a molecular sieve used for drying and purifying a carrier gas, and a flow control unit, a temperature control unit, a humidity sensing unit and a processor unit, which are used for measuring and controlling temperature, humidity and the carrier gas flow. According to the ion mobility spectrometer provided by the invention, a humidification bottle and a flow valve are arranged to adjust and control the humidity of the carrier gas in the migration tube, and humidity sensors are arranged at a gas outlet of the migration tube and an outlet end of the molecular sieve to compare a humidity difference detected by the two and judge whether the molecular sieve is ineffective or not; an expert assistance PID control method is used for controlling the carrier gas flow, in order to improve the control precision and stability of the carrier gas flow; and the ion mobility spectrometer provided by the invention adopts an embedded design, thereby being convenient to use, strong in flexibility and suitable for onsite application.

The invention discloses a dust offline sampling system in a closed loop type high-pressure natural gas pipeline, and the dust offline sampling system comprises a sampling subsystem, a dust collecting subsystem, a metering regulating subsystem and a booster power subsystem which are sequentially connected in series through pipelines, wherein the output end of the booster power subsystem is communicated with one port of a return pipeline; the other port of the return pipeline stretches into a high-pressure natural gas pipeline; the sampling subsystem at least comprises a tubular sampling mouth; the dust collecting subsystem at least comprises a dust collector; a control valve group is arranged on a pipeline which connecting the sampling subsystem and the dust collector; the metering regulating subsystem at least comprises a flow transmitter and a flow regulating valve; and the booster power subsystem at least comprises a booster pump so that natural gas samples return to the natural gas pipeline through the return pipeline. By the adoption of the dust offline sampling system, the zero discharge during the process of dust sampling detection in the natural gas pipeline can be realized, and safe and reliable dusting sampling detection process can be ensured; therefore, the dust offline sampling system has the advantage of reducing the environmental pollution.

The invention discloses a civil solid fuel combustion atmospheric pollutant emission field detection device which is characterized by comprising a flue gas inlet part, a dilution air part, a dilutionmixing part and a sampling part. The civil solid fuel combustion atmospheric pollutant emission field detection device can measure the emission concentration of civil solid fuel combustion particles and gases such as CO2, CO, SO2 and NOx, and can accurately determine an emission factor thereof. In addition, the civil solid fuel combustion atmospheric pollutant emission field detection device has the advantages of compact structure, simplified system and the like, and is suitable for field application.

The invention belongs to the field of biotechnology, and relates to a loop-mediated isothermal amplification (LAMP) assay kit of Coxsackie A16 (Cox A16) and Enterovirus 71 (EV 71) which are main pathogens of hand, foot and mouth disease, and an establishment method and an application of the assay kit. The assay kit comprises four LAMP primers and LAMP reaction liquid for detecting Coxsackie A16, and four LAMP primers and LAMP reaction liquid for detecting Enterovirus 71. Tests prove that the assay kit has the advantages of good specificity and sensitivity, rapid amplification rapid, high efficiency and simple identification. A detection system provided by the invention can rapidly, conveniently, efficiently, high specifically and high sensitively detect Coxsackie A16 and Enterovirus 71 without complex apparatuses thus can satisfy well clinical detection requirements of hand, foot and mouth disease, and is suitable for a large-scale promotion and an application.

The invention provides a movable analysis system of reducing sulfides in the atmosphere. The movable analysis system of reducing sulfides in the atmosphere is utilized for on-site monitoring of hydrogen sulfide, carbonyl sulfide and methyl mercaptan in the atmosphere. The movable analysis system of reducing sulfides in the atmosphere mainly comprises an electric refrigerator, a quartz-lining silcosteel and a portable gas chromatograph. The electric refrigerator is a refrigeration source. A temperature is controlled in a range of -150 to -180 DEG C so that the enrichment of oxygen or nitrogen is avoided. The movable analysis system of reducing sulfides in the atmosphere is characterized in that at a low temperature, hydrogen sulfide, carbonyl sulfide and methyl mercaptan in about 1L of a gas sample are enriched in the quartz-lining silcosteel; the quartz-lining silcosteel is connected to the portable gas chromatograph by an eight-way valve; a normal-temperature resolution process is carried out; and a concentrated component obtained by enrichment is fed into the portable gas chromatograph and is subjected to analysis and determination. Compared with the prior art, the movable analysis system of reducing sulfides in the atmosphere has the advantages of simple operation, fast analysis rate and high accuracy.

The invention relates to the technical field of non-destructive detection of power transmission lines, in particular to a non-destructive detection method for detecting the crimping quality of a compression type tension-resistant wire clamp by utilizing an ultrasonic phased array. The non-destructive detection method comprises the following specific implementation steps: selecting a crimping planeafter the completion of tension-resistant wire clamp crimping as a detection surface; setting workpiece parameters of a detected tension-resistant wire clamp joint and adjusting an ultrasonic phasedarray instrument; putting a probe on the crimping plane, adjusting an instrument gain value and the display scope by adopting a phased array longitudinal wave detection method, so that a fan scanningimage is clear, and an internal structure of a crimping joint is presented in the form of the image; obtaining and preserving the clear image, and analyzing and judging the crimping situations. The non-destructive detection method provided by the invention has the benefits that the online detection can be performed, and the detection quality accuracy is high, so that the working efficiency is significantly improved, and the safe operation of a power grid is guaranteed; the ultrasonic phased array can directly reflect the crimping quality of the tension-resistant wire clamp through the visual image without moving the probe, and detection results are displayed in the form of the image, so that clear and visual effects are realized; the non-destructive detection method is simple and suitablefor field application.

The invention discloses a method of measuring sodium chloride content in phosphate by spectrophotometry, which solves the problem that chloride ion in phosphate added in utility boiler can not be controlled effectively so that steam and water quality is deteriorated. It is provided with convenient operation, easy operation and accurately measuring sodium chloride content in phosphate quickly so on. The method is that 0.2% of mixed solution of mercury thiocyanate and methyl alcohol is added in standard solution of chloride ion to generate mercuric chloride and release SCN-; then 0.15mol / L-2.5mol / L of mixed solution of mercury thiocyanate and perchloric acid is added to generate stable jacinth complex compound, of which absorbency A deducting blank absorbency A0, namely A-A0 and the chloride ion content has the smooth curve relation; on the curve linear relation chloride ion content is fetched in the range of 0-1000CI- mu g / L to build the equation of the absorbency (A-A0) and the chloride ion content C, namely (A-A0)=a+bC; after certain tri-sodium phosphate solution is fetched to measure absorbency blank absorbency is deducted; the standard curve is calculated or checked to obtain chloride ion content; then sodium chloride content in phosphate is obtained.

The invention discloses a method for measuring the thickness of the RTV coating of an insulator, comprising the following steps: S1, bombarding the RTV coating with set pulse laser, and recording the number of bombardment times (x) of laser when the RTV coating is broken through; and S2, calculating the thickness f(x) of the RTV coating according to the formula f(x)=a*x+b, wherein the parameters a and b are determined through the following experiment steps: bombarding the RTV coating with set pulse laser, recording the thickness of the broken-through RTV coating and the corresponding number of bombardment times of laser, and fitting the curve f(x)=a*x+b to obtain the parameters a and b. No matter how long the RTV coating of the insulator operates, the thickness of the RTV coating can be obtained by measuring the number of bombardment times of laser after checking. The method is suitable for field application.

The invention relates to the modification to transfer the measured value by the three-dimensional vision. If it is the vidicon or the binocular system, the drone plane can be moved arbitrarily. It can measure the space coordinates of the three characteristic points which are not in the same line arbitrarily for the drone plane in every position to resolve the conversion relation between the drone planes coordinates and the theodolite coordinates, so it can get a series of the space three-dimensional coordinates of the index point. The invention has the small difficulty and low cost comparing to the solid drone; It has the high precision comparing to the movable plane drone; the process is simple and has little workload comparing to the setting characteristic points, so it is proper to be used in the locale.

The invention provides a method for determining reasonable liquid production capacity of different well groups in an offshore oilfield. The method for determining reasonable liquid production capacity of different well groups in the offshore oilfield comprises the followings steps: step 1, analyzing differences of different well groups and building a typical well group geologic model; step 2, according to the built typical well group geologic model, researching influence rules of all single factors on reasonable production pressure difference and reasonable liquid capacity; step 3, quantitatively sorting influence degrees of all single factors, and determining main factors influencing the reasonable production pressure difference and reasonable liquid capacity; and step 4, comprehensively considering all main factors, orthogonally designing multiple schemes for optimal computation, and drawing a reasonable production pressure difference and reasonable liquid capacity consulting board chart. The method for determining reasonable liquid production capacity of different well groups in the offshore oilfield has the advantages that the problem that oil well reasonable production pressure difference and reasonable liquid capacity of different oil wells in the sea is difficultly determined under the influence of multiple factors is solved, so that the purpose of greatly increasing the recovery ratio of the offshore oilfield is realized.

The invention relates to a preparation method of a colloidal gold reagent and a rapid detection method for a fusion tag. The colloidal gold reagent belongs to a detection reagent of a FLAG fusion tag in the field of biologic research. A double- antibody sandwich method immunoassay principle is adopted in the method, and a Flag monoclonal antibody and a Flag polyclonal antibody which are purified are respectively used as a colloidal gold combined antibody and an envelope antibody, thus the gene engineering expression protein adopting FLAG as the fusion tag is rapidly detected.

The present invention provides an elastic flow channel regulating particles which are a substance of the general formula (I), wherein Gt is triglyceride, and n is from 1 to 6. The invention also provides a preparation method of the elastic flow channel regulating particles. The method comprises the steps of: (1) heating sulfur until the sulfur is completely melt into a liquid to obtain liquid sulfur; (2) fully mixing the liquid sulfur with vegetable crude or oil foot, and then heating the mixture and performing a reaction to obtain solid sulfur rubber particles; and (3) granulating and sortingthe solid sulfur rubber particles to obtain the elastic flow channel regulating particles.

The invention provides a viscosity reducing corrosion inhibitor for viscous oil mining, gathering and transportation. The viscosity reducing corrosion inhibitor comprises the following components in percent by weight: 5 to 8.5 percent of weak polar polymer, 0.5 to 1.5 percent of alkylaryl sulfonate, 1 to 2 percent of imidazoline derivate, and 88 to 93.5 percent of an organic solvent, wherein the sum of the weight of all the components of the viscosity reducing corrosion inhibitor is 100 percent. The invention further provides a preparation method of the viscosity reducing corrosion inhibitor.The method comprises the following steps: adding the weak polar polymer, alkylaryl sulfonate, imidazoline derivate and organic solvent into a reaction kettle, and uniformly stirring to ensure that allthe components are sufficiently mixed; then performing cooling, so as to obtain the viscosity reducing corrosion inhibitor. The viscosity reducing corrosion inhibitor has the efficacy of reducing viscosity and inhibiting corrosion, can obviously reduce the viscosity of viscous oil and slows down pipeline corrosion.

A wellhead detection unit for drilling tool joint screw thread stress conditions belongs to the field of nondestructive testing, and comprises a drilling tool joint screw thread detection device, a linear guide rail, a drilling tool joint outer-diameter centering mechanism, a bearing trolley, a power source and an instrument control box; the drilling tool joint outer-diameter centering mechanism comprises a positioning rod flange base, a centering shaft and a centering clamp, and the positioning rod flange base is fixed on a supporting plate, the centering clamp is fixed onto the centering shaft through a screw, the centering shaft is inserted into a stroke hole of the positioning rod flange base; the drilling tool joint screw thread wellhead detection device comprises a rib plate, a conversion block, a main shaft, a copper sleeve, a positioning pin shaft, a rotating ring, a bearing screw, a flange linear bearing, a through-wall sealing joint, a steel ring cover plate, an umbrella rod disk, an umbrella rod, a steel ring, a swing rod, a sensor seal box and a sealing joint; the wellhead detection unit for drilling tool joint screw thread stress conditions is stable in the structure, high in structural strength, abrasion resistant, fast in detection speed, high in detection precision, and capable of realizing fast and accurate screw thread detection of large scale joints.

The invention provides a method for improving the tensile strength of a full-tailing cemented filling body by utilizing rice straws, and belongs to the field of metal mine underground filling. The parameters of the added rice straws in the method for improving the tensile strength of the filling body are as follows: the length of the rice straws is 6-15mm, and the mixing amount accounts for 0.02-0.08% of the solid mass. According to the method, the tensile strength of the filling body is researched, the rice straws are selected as the material for improving the mechanical property of the filling body, a series of tensile strength tests are conducted, finally the method capable of effectively improving the tensile strength of the filling body is obtained, and the increasing rate of the tensile strength compared with that of a common filling body is calculated. According to the method, the tensile strength of the filling body prepared by adding rice straws with different lengths and mixing amounts is far higher than that of a common filling body without rice straws.

A method for diagnosing activity of activated sludge ratio electronic transmission system includes utilizing test tube to determine dry weight of sludge, using iodinenitryl tetraazole as electronic receptor and using methanol as excctant to extract out INTF in microbiological cell under ambient temperature.

The invention discloses an electrochemical bio-sensing system. The bio-sensing system comprises an electrochemical detector integrated in a cell phone; an electrochemical analysis module running in the cell phone; a bio-sensing chip; and an adapter used for connecting the electrochemical detector and the bio-sensing chip. The electrochemical detector and the cell phone are integrated in the electrochemical bio-sensing system, and the electrochemical bio-sensing system has the advantages of small volume, convenient operation and easy carrying. The electrochemical analysis module is integrated in the cell phone, and influence and interference of extraneous environment during an electrochemical detection process can be avoided. The system has all functions of the cell phone, the electrochemical bio-sensing detection can be conveniently and rapidly realized, the system is compatible with other functions and applications of the cell phone, and real-time processing, analysis, diversified transmission and network sharing for the data can be realized.

The invention belongs to the technical field of biomass charcoal fertilizers, in particular relates to a biomass charcoal-based nitrogenous fertilizer and further discloses a preparation method of thebiomass charcoal-based nitrogenous fertilizer. The biomass charcoal-based nitrogenous fertilizer is prepared by mixing biomass charcoal as a carrier with a nitrogenous fertilizer, with the combination of high pressure steam and biomass charcoal with properties of super adsorption and loosened and porous surfaces, nitrogenous fertilizer powder can be well combined with the biomass charcoal, the wrapping property of the fertilizer can be improved through an adhesive and packing, and thus a good granular shape with appropriate hardness can be formed. On one hand, decomposition and valorization of the nitrogenous fertilizer can be retarded, the purpose of gradually releasing nitrogen can be achieved, and by slowly releasing nitrogenous fertilizer components such as urea, the fertilizer effectis prolonged, and fertility loss is reduced; meanwhile, plant root system development and in-vivo nitrogen metabolism can be promoted, nitrogen absorption can be promoted, and the nitrogenous fertilizer utilization rate is increased; and in addition, transportation and storage of the fertilizer can be facilitated, and the fertilizer is applicable to field application.

The invention discloses an unhooking device. The unhooking device comprises a hook main body, a clamping tongue and a restraining buckle, wherein the clamping tongue is rotatably assembled at the lower part of the hook main body; the restraining buckle is rotatably assembled in the middle of the hook main body; the unhooking device has a closed state and an open state; when the unhooking device isat the closed state, a whole body of the hook main body and the clamping tongue is of a hook shape; the restraining buckle is used for limiting the clamping tongue and a sealed ring is formed by therestraining buckle and the hook main body; when the unhooking device is at the open state, the clamping tongue is separated from the restraining buckle. The invention further discloses a hoisting hanger with the unhooking device and a construction method for lowering a steel reinforcement cage by the hoisting hanger. The unhooking device disclosed by the invention is simple in structure and convenient to use; the unhooking device is matched with a steel wire rope to replace a hanging steel bar to lower the steel reinforcement cage, so that the construction cost is reduced and time is saved.