170 results about "Steel mill" patented technology

The invention relates to the technical field of ceramics, and particularly discloses green special refractory ceramic slurry as well as a preparation method and application thereof. The green special refractory ceramic slurry is prepared from aluminum oxide, methyltrimethoxysilane-phosphoric acid modified polysiloxane, fluorocarbon emulsion, expanded vermiculite powder, silane coupling agent modified feldspar tailing powder, a dispersing agent, an organic silicon defoaming agent, a polyurethane curing agent and deionized water. After being sintered, the green special refractory ceramic slurry provided by the invention has excellent high-temperature stability, corrosion resistance, thermal shock resistance and mechanical strength, and solves the problems of low high-temperature-resistant upper limit and poor corrosion resistance of the traditional slurry, so that the sintered ceramic adapts to severe high-temperature working conditions such as steel plant converter liners and chemical high-temperature reaction kettle inner walls; and long-term protection requirements of industrial equipment are met.

This utility model discloses a baking device for steelmaking plants, including a baking furnace body, a combustion nozzle assembly, and a slag collection trough. The baking furnace body has a feed inlet at the top and a discharge outlet at the bottom. The combustion nozzle assembly is vertically positioned above the interior of the baking furnace body. The slag collection trough is located below the baking furnace body, with an open top connecting to the discharge outlet. The bottom wall of the slag collection trough is inclined, and a spiral slag discharger rotates within it, with its axis parallel to the bottom wall. This utility model adjusts the height of the injection pipe and nozzle by extending and retracting the first cylinder of the combustion nozzle assembly, thus optimizing baking uniformity for materials of different thicknesses. After baking, the slag falls into the slag collection trough through the discharge outlet and slides along the inclined bottom wall towards the spiral slag discharger. The rotating spiral blades, with a variable pitch structure, push the slag towards the outlet, improving slag discharge efficiency.

An electric arc furnace (10) usable for melting a metal charge (M), the electric arc furnace (10) comprising a vessel (11) having at least one peripheral wall (20) with a top opening (21), a side slag discharge opening (22) and a side input opening (43). A selectively openable roof (15) can be placed over the top opening (21) of the vessel (11), the roof (15) having a central portion (30) with one or more through holes (31) through which electrodes (32) for melting the metal charge (M) can be inserted to provide clearance.

The utility model discloses a vertical dust removal pipe with an automatic dust removal function, and relates to the technical field of dust removal devices. The dust removal device comprises a dust removal header pipe, a dust removal branch pipe which is perpendicular to the dust removal header pipe and internally communicated with the dust removal header pipe is arranged below the dust removal header pipe, and a dust removal valve is arranged on the dust removal branch pipe; inclined flow guide pipes are respectively arranged above the dust removal valve and on the two sides of the dust removal branch pipe, the upper ports of the flow guide pipes are connected to the dust removal main pipe, the lower ports of the flow guide pipes are connected to the dust removal branch pipe, and the interiors of the flow guide pipes are communicated with the interiors of the dust removal main pipe and the dust removal branch pipe. The utility model provides the vertical dust removal pipe with the automatic dust removal function, and the vertical dust removal pipe can automatically clean accumulated dust in front of a dust removal valve under the condition of not consuming extra electric energy, so that the problem of dust accumulation in front of the dust removal valve caused by original design errors of a dust removal pipeline of a steel plant is solved.

The invention discloses an ironmaking group production optimization method based on the relation between the iron ore general index and the lump ore premium price, and belongs to the technical field of blast furnace ironmaking in the iron and steel industry. The price comparison relation between the standard fine ore and the Australian lump ore is measured and calculated according to the general index of iron ore and by combining the sintering production process cost of an iron making plant of an iron and steel enterprise and the coal coke price for a blast furnace, reasonable ore use for iron making is guided, and the iron making cost is reduced. Meanwhile, on the basis of the price comparison relation between the fine ore for sintering and the lump ore for the blast furnace under the enterprise production condition, the relation between the market iron ore general index and the lump ore premium price is compared, the purchase plan of the fine ore and the lump ore is quickly decided, iron ore resource changes are responded, and market opportunities are grasped. According to the method, the relation model of the lump ore premium price and the general index is established, the ironmaking raw material structure and the production organization are dynamically optimized, and the problem that cost optimization is difficult to achieve in raw material purchasing and production organization of enterprises is solved.

1. A direct iron ore reduction process, in which an NH3-containing gas feed (24a) is fed to a gas reformer (25) where it is reformed to obtain a hydrogen-containing reducing gas (25a, 25b), at least a portion of which is fed to a direct reduction reactor (1) where iron ore (2) is subjected to direct reduction with the reducing gas (25a, 25b) to obtain directly reduced iron (30), and during reforming of the hydrogen-containing reducing gas (25a), NH3 in the gas feed (24a) is subjected to the dissociation reaction 2NH3 → N2 + 3H2.

The invention discloses a converter smelting determination method and device, electronic equipment and a storage medium, and belongs to the technical field of converter smelting. The method comprises the following steps: matching a first gas content in an evaporative cooler before a converter to be detected is loaded with a first preset gas content standard, and determining a matching result; based on a matching result, determining whether to start blowing of the to-be-detected converter or not; after it is determined that blowing of the to-be-detected converter is started, whether a blowing permission instruction for blowing the to-be-detected converter is generated or not is determined on the basis of the second gas content at the outlet of the electrostatic dust collector before blowing and a second preset gas content standard; and after it is determined that the blowing permission instruction for blowing the converter to be detected is generated, the oxygen lance is controlled to descend in response to the blowing permission instruction, and the blowing process is started based on the preset oxygen lance control parameters corresponding to the oxygen lance. According to the invention, standardization of blowing of converters of different steel plant equipment can be realized. And the production efficiency and the yield of steel are further improved.

The invention discloses a steel plant management statistics intelligent data processing system and method. Comprising a converter original report module, a refining furnace original report module, a refining furnace production report module, a steelmaking production report module and a steelmaking three-shift report module. And each module is respectively provided with functions of data display, query, export and report updating. According to the invention, by integrating the related data in the production process of the steel plant and intensively displaying various types of data in different pages, unified management of the data is realized. Meanwhile, convenient data entry, modification and deletion operation and efficient query and export functions are achieved, the time and labor cost of data management are greatly saved, and the data management efficiency is improved.

The application discloses a steel mill converter management and statistics system and method. The system comprises a production process monitoring module, a converter operation performance module, a production history tracing module, a converter stock material module and a data processing updating module. The production process monitoring module is used for monitoring and filling important data in the converter production process. The converter operation performance module is used for collecting various signal data and manually filling data in the converter production process. The production history tracing module is used for automatically and regularly counting the converter operation performance according to a set statistical method. The converter stock material module is used for setting the identification logic of part signals. The data processing updating module is used for regularly updating the data by combining the signal identification algorithm and the manual field calibration, supporting the query and screening based on the user selection, and providing the data export and backup functions. The application automatically collects, manually fills and automatically counts the related data in the converter production process of the steel mill, greatly saves the time and labor cost of data management, and improves the data management efficiency.

METHODS FOR TREATING WATER WITH ACTIVATED CARBON POWDER TO REDUCE ORGANIC MATTER CONTENT. The present methods described reduce the amount of organic matter in water, including reducing the total amount of organic carbon in the water. The method includes adding activated carbon powder to the water; mixing the activated carbon powder in the water; and separating the activated carbon powder from the water. In addition, a method for reducing the glycol content in water containing glycols, and a method for reducing the glycol content in a wastewater stream in a steel mill containing glycols are described.

The invention relates to the technical field of converter units of steel works, in particular to a converter waste heat recovery circulating system and oxygen lance intelligent collaborative energy-saving system and method. A feed pump motor; a PLC control end; oxygen blowing equipment; the HMI display unit, the transformer and the frequency converter are electrically connected through a high-voltage isolating switch, the other end of the frequency converter is electrically connected with a water feeding pump motor, one end of the frequency converter is electrically connected with the PLC control end, and one end of the PLC control end is connected with the local control box, the HMI display unit and the oxygen blowing equipment. The monitoring picture also displays the running state of the water feed pump, the rotating speed and current of the motor, the power-on feedback and fault of the frequency converter and various state signals, the alarm picture can provide the alarm function for the fault of the water feed pump, the fault of the frequency converter and the like, and a recording curve is designed for key data. Frequency conversion adjustment of a newly-added frequency converter of a water feeding pump in a converter waste heat recovery circulating system is interlocked with oxygen lance operation.

The invention belongs to the technical field of metallurgical slag resource utilization, and particularly relates to a nickel smelting slag recycling process. Comprising the following steps: mixing and drying stainless steel pickling sludge, Bayer process red mud and coke powder to prepare iron-containing coke powder; setting a slag pot position and a spray gun position; when the molten nickel smelting slag falls down, iron-containing coke powder is sprayed out at a constant speed through argon by using a spray gun, the molten nickel smelting slag is blown away, and then a reduction reaction is carried out; a fluxing agent is added into the reduced molten nickel smelting slag, then vacuumizing is conducted, magnesium is reduced and evaporated, magnesium steam is collected and cooled, and elementary substance magnesium and magnesium-removed molten nickel smelting slag are obtained; coke powder and metal carbide powder are added into the magnesium-removed molten nickel smelting slag, cooling is conducted after reaction, reaction materials are taken to be crushed, ground and magnetically separated, Fe-Ni-Cr enriched alloy is obtained and used for a steel plant, remaining materials are used as aggregate in a cement plant, the production process is simple, the recovery process is short, energy consumption of equipment can be greatly reduced, and the metal recovery rate is increased.

The utility model belongs to the technical field of filter pressing, and particularly relates to a steel mill sewage treatment diaphragm filter press which comprises a filter press body, the left side of the filter press body is communicated with the first liquid inlet pipe; the filtering mechanism is located on the left side of the first liquid inlet pipe, and the filtering mechanism is used for filtering oil dirt; the installation mechanism is located at the top of the filtering mechanism, the installation mechanism is used for facilitating workers to quickly maintain a filtering plate, the filtering mechanism comprises a filtering box, a second liquid inlet pipe, an oil stain filtering plate, a sealing plate and an installation plate, and the left side of the first liquid inlet pipe is communicated with the filtering box. According to the filter press provided by the invention, oil dirt can be filtered and is prevented from blocking filter cloth to influence normal operation of the filter press, and the oil dirt filter plate can be quickly detached through matched use of the mounting mechanism, so that the oil dirt filter plate is convenient to replace and maintain.

The utility model relates to a replacing system for a crane beam in a limited space of a steel plant. The replacing system comprises a converter platform and a replacing device, the replacing device is located on the converter platform and can move on the converter platform, the new crane beam is placed on the converter platform, and the replacing device is used for dismantling the old crane beam and installing the new crane beam; by arranging the replacing device, the converter platform does not need to be reinforced, the construction period is shortened, the construction cost is saved, and the crane beam is convenient to install and replace; meanwhile, the rapid recovery capacity of the production line is guaranteed, the construction period is guaranteed, and potential safety hazards caused by the complex environment are avoided.

The invention discloses a steel mill sludge solid waste resource utilization method, which comprises the following steps: collecting converter primary dedusting ash and converter secondary dedusting ash, arranging a cofferdam in a material yard by using the converter secondary dedusting ash, pouring sludge into the cofferdam, adding the converter secondary dedusting ash in the sludge pouring process for mixing, and pouring the sludge into the cofferdam. Obtaining a waste tail mud semi-finished product; and adding primary fly ash of the converter into the semi-finished product of the waste tail mud, and mixing and stirring to obtain a finished product of the waste tail mud. The method has the beneficial effects that in a cold rolling plant and a power plant, the primary dust removal system and the secondary dust removal system are common equipment, so that raw materials can be directly obtained from the original equipment, a new production line does not need to be established, new equipment does not need to be purchased for processing, and the production cost is saved; the method does not need high energy consumption caused by drying in a traditional process, the treatment process is simple and effective, and the advantages of being simple in process, low in energy consumption and low in equipment investment are achieved.

The negative pressure dust collection device for sintering workshops in steel plants provided by this invention includes a filtration and purification system and a vacuum pump unit connected to the filtration and purification system. The filtration and purification system includes a support frame, a first processing chamber, and a second processing chamber. The first processing chamber is mounted on the support frame and contains a filtration unit. The second processing chamber is mounted on the support frame and connected to the first processing chamber, and contains a purification unit. The filtration and purification units can effectively remove dust from the flue gas discharged from the sintering workshop, effectively remove dust cakes adhering to the filter cartridges, reduce filter material wear, improve energy utilization, thereby reducing compressed air consumption, which is beneficial for reducing production costs and extending the service life of the dust collection equipment.

The utility model relates to the field of ultra-narrow steel coils, and discloses a steel coil frame for transporting ultra-narrow steel coils, which comprises an ultra-narrow steel coil body, a bottom plate is arranged at the bottom of the ultra-narrow steel coil body, a triangular peak body is fixedly connected to the top of the bottom plate, an N-shaped beam is fixedly connected to the top of the bottom plate, and the N-shaped beam is fixedly connected to the bottom of the ultra-narrow steel coil body. A triangular sleeper is arranged on the surface of the N-shaped beam, a guide assembly is arranged on the surface of the triangular peak body, the N-shaped beam is arranged on the outer wall of the triangular peak body in a sleeving mode, the guide assembly comprises a mounting groove, a supporting rod is fixedly connected to the inner wall of the mounting groove, and a guide roller is rotationally connected to the outer wall of the supporting rod; the mounting grooves are formed in the outer walls of the sides, close to the ultra-narrow steel coil body, of the triangular peak bodies. According to the semi-trailer, through the arrangement of the bottom plate, the triangular peak bodies, the N-shaped beams and other structures, vertical loading operation of ultra-narrow steel coils can be achieved on the premise of not depending on special machines and tools when the semi-trailer transports ultra-narrow steel coil products of a steel mill.

The invention discloses a solid welding wire, a composite stepping plate and manufacturing methods of the solid welding wire and the composite stepping plate, and belongs to the technical field of composite stepping plates. The composite stepping plate is composed of a base body and a wear-resisting face, the wear-resisting face is made of a solid welding wire containing nanometer rare earth oxide particles, the solid welding wire is composited on a base body material in a surfacing mode, and therefore a composite structure combining hardness and softness is formed. The composite stepping plate manufactured through the manufacturing method is excellent in abrasion resistance, corrosion resistance, impact resistance and fatigue resistance, not only can overcome the severe working conditions of mutual extrusion, friction and environmental corrosion between workpieces when the strip steel is subjected to rolling force in the rolling process, but also can meet the increasing production requirements of steel mills.

The utility model relates to the technical field of fans, in particular to a sintering fan for a steel mill, which comprises a main body, a sleeve is arranged on the main body, a first fixing ring is arranged on the inner side of the sleeve, a filter screen is arranged on the first fixing ring, and a fixing assembly is arranged between the first fixing ring and the sleeve. In the working process, the sleeve component, the dust removal bag component and the filter screen component are matched with one another, so that air exhausted by the main body is filtered in a multi-layer mode, the filtering effect on the exhausted air is achieved, and pollution to the surrounding environment is avoided; and through mutual cooperation of the buckle component and the second fixing ring component, the dust removal bag can be conveniently and rapidly mounted and dismounted, and through mutual cooperation of the sliding block component, the first fixing ring and the driving rod component, the position of the filter screen is limited, and the filter screen is prevented from moving in the working process.

The invention discloses a method for improving steel ladle state evaluation accuracy, and belongs to the field of steelmaking refining. According to the method, firstly, a temperature thermocouple is installed in a steel ladle refractory material to monitor temperature changes on line, then the concept of a steel ladle thermal state coefficient is proposed, and the thermal state is quantitatively evaluated according to the proportion of the accumulated steel containing time within 1500 minutes (the coefficient x is equal to the ratio of the accumulated steel containing time to 1500); and finally, the temperature drop of the molten steel is accurately calculated through a regression equation delta T = 27.9 x-59.4 x + 24. Actual measurement shows that according to the method, the temperature prediction variance is reduced to 1.7 from 4.6 of a traditional identification method, and the average deviation is optimized to-0.05 DEG C. The method has the advantages that state quantitative evaluation is achieved, data regression analysis is supported, the continuous casting temperature control precision is improved, and steel mill crossing popularization feasibility is achieved. The method provides key technical support for intelligent steelmaking.

The disclosure discloses a method of operating an electric arc furnace, the method comprising capturing, from at least one facility of a steel mill, a heated metallurgical gas comprising water and carbon monoxide; conducting, by a reactor supply line, said metallurgical gas to a reactor; transforming, by a treatment of said metallurgical gas within said reactor, the carbon monoxide and water into hydrogen and carbon dioxide according to a water-gas shift reaction; and subsequently separating said hydrogen by a separation device. The method is characterized in that it further comprises providing an iron-bearing material, which comprises iron mainly in the form of iron oxide, to the electric arc furnace; at least partially melting the iron-bearing material to obtain a molten bath; conducting, by a furnace supply line, said hydrogen to the electric arc furnace, which is arranged downstream of the furnace supply line; and injecting, by a plurality of hydrogen injection devices, said hydrogen into said electric arc furnace, such that said hydrogen reacts as a reducing agent for reducing iron oxide in the molten bath during a smelting operation of the electric arc furnace.

The invention discloses a honeycomb type coating catalyst for purifying waste gas CO as well as a preparation method and application of the honeycomb type coating catalyst, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: adding ammonia water into a mixed salt solution of cobalt, cerium, titanium, aluminum, lanthanum and bismuth, carrying out coprecipitation, washing, drying and roasting to obtain Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite oxide powder, adding the Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite oxide powder, a water-soluble palladium compound and a bonding component into deionized water, carrying out ball milling to obtain slurry, repeatedly immersing a ceramic honeycomb in the slurry, taking out the ceramic honeycomb, drying and roasting to obtain the Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite ceramic honeycomb. The honeycomb type coating catalyst for CO purification is obtained. The honeycomb type coating catalyst has the advantages of high coating loading capacity, high strength, difficulty in falling off, capability of effectively resisting adverse effects of NH3, NO, H2O and SO2 in waste gas and maintaining extremely high catalytic efficiency for a long time, is particularly suitable for a waste gas treatment program of a steel mill, and has relatively high industrial application value.

The application provides a solid oxide electrolytic cell system for hydrogen production by utilizing steel plant waste heat, and belongs to the technical field of hydrogen production, and solves the problems of low utilization rate of steel plant waste heat and large energy loss in the prior art. The system comprises an air blower, an electric three-way ball valve, a first heat exchanger, a three-way valve, a solid oxide electrolytic cell stack, a waste heat boiler, a steam turbine generator and an AC / DC converter. A branch of the first heat exchanger is connected with high-temperature gas or solid generated by the steel plant, and an output end of the branch is sequentially connected with electrodes of the solid oxide electrolytic cell stack through the waste heat boiler, the steam turbine generator and the AC / DC converter. An input end of the electric three-way ball valve is connected with the air blower, an output end one of the electric three-way ball valve is connected with an input end one of the three-way valve through a branch two of the first heat exchanger, and an output end two of the electric three-way ball valve is directly connected with an input end two of the three-way valve. An output end of the three-way valve is connected with an air side inlet of the solid oxide electrolytic cell stack. The steel plant waste heat is utilized to provide preheated air and power supply for the electrolytic cell stack.

The invention belongs to the technical field of coupler repairing, and particularly discloses a steel plant converter coupler repairing device which comprises a workbench and bearings, a mounting plate is fixedly connected to the workbench, the outer ring of one bearing is fixedly connected with the mounting plate, a rotating cylinder is fixedly connected to the inner ring of the bearing, threads are arranged on the inner wall of the rotating cylinder, and a rotating handle is fixedly connected to one end of the rotating cylinder. A screw rod is in threaded connection with the interior of the rotary drum, the other end of the screw rod is fixedly connected with the inner ring of the other bearing, a connecting plate is fixedly connected to the outer ring of the other bearing, short rods are hinged to the two ends of the connecting plate, clamping fixing rods are hinged to the other ends of the short rods, a second mounting plate is hinged to the clamping fixing rods, and the second mounting plate is fixedly connected with the workbench. The clamping and fixing rods are synchronously opened and closed by driving the lead screws, so that the arc-shaped plates automatically adapt to and clamp couplings with different diameters, the couplings are fixed, and the problem that in the prior art, a universal fixing device for repairing the couplings cannot adapt to the couplings with different specifications, and consequently the repairing work efficiency is low is solved.

The invention discloses a normal-temperature curing self-cleaning ash-resistant oil-stain-resistant high-light-transmittance super-hydrophobic nano coating and a preparation method thereof. The method comprises the following steps: mixing a nano silicon dioxide dispersion, a nano tin oxide quantum dot dispersion, an acid catalyst and a solvent to obtain a first mixed solution; dropwise adding a mixture containing siloxane dimer, fluorosilane and a solvent into the first mixed solution, and continuing to react after dropwise adding to obtain a primary material; the primary material is subjected to aging treatment. The hydrophobic angle of the coating is larger than 120 degrees, the light transmittance increment is larger than 2%, the resistivity is 108-109, the coating has excellent stain resistance, antistatic performance, dust resistance and corrosion resistance, the efficiency of an original power station is improved by 40% or above, and the coating has a good application prospect. The continuous and efficient power generation capacity of a distributed photovoltaic power station under high-corrosion and high-dust environment conditions such as a steel plant, a cement plant and an aluminum plant is effectively achieved, and the method has a good application prospect.

The invention relates to a method for capturing acidic pollutants from flue gas by recycling steel slag generated in a steelmaking process of a steel plant as an adsorbent. The acidic pollutants comprise HCl, HF, SOx and / or NOx. In order to improve the efficiency of capturing nitrogen oxides, the steel slag contains crystalline calcium silicate and a calcium magnesium silicate phase. Furthermore, the method for producing the adsorbent should comprise the steps of: producing a particulate steel slag material from the steel slag, the particulate steel slag material having a first particle size distribution having a D50 mesh size value of less than 70 m and a first specific surface area; and increasing the first specific surface area of the particulate steel slag material to a second specific surface area higher than 5 m2 / g by carbonating the particulate steel slag material with a gas comprising carbon dioxide. The flue gas is then contacted with at least a portion of the carbonated granular steel slag material as the adsorbent to trap the acidic contaminants in the carbonated granular steel slag material.

The invention discloses a steel mill gas generator set operation system and method based on an energy storage system. Comprising a fuel mother pipe, an efficient generator set, a gas generator set and a heat storage system with a combustion function. The fuel mother pipe provides fuel for the efficient generator set, the gas generator set and the heat storage system with the combustion function through pipelines. And the control system controls the fuel mother pipe to provide a preset amount of fuel to the efficient generator set, the gas generator set and the heat storage system with the combustion function within a preset time according to a preset program. According to the invention, the energy storage system acts on the low-efficiency unit, the distribution of coal gas among the generator sets in different time periods is adjusted by utilizing the characteristic that the energy storage system can realize the decoupling operation of the generator and the boiler, and the power generation capacities of different units are all concentrated in the high-electricity-price time period to be exerted on the premise that the total coal gas supply quantity is not changed, so that the outsourcing electric quantity in the high-electricity-price time period is reduced; and the electricity purchasing cost of a steel mill can be greatly reduced while the self-generating rate is improved.

The invention discloses a method for predicting the residual life of a crystallizer in a continuous casting machine of a steel plant and a related device, and relates to the field of artificial intelligence. And the service life evaluation of the crystallizer is changed from human experience to automatic prediction. Specifically, firstly, fusion data of time sequence parameters and static parameters in continuous historical time periods are collected; and then, inputting the data into a steel plate thickness reduction prediction model, and accurately extrapolating the predicted copper plate thickness reduction in the future time period by using the model. And finally, determining the service life of the crystallizer based on the steel plate thickness of the crystallizer at the current time and the predicted steel plate thickness reduction. Therefore, clear maintenance and replacement opportunity suggestions can be given based on the service life of the crystallizer, cost waste caused by too early replacement is avoided, major safety accidents such as steel breakout caused by too late use are eradicated, and optimal balance between cost and safety is achieved.

The utility model relates to the technical field of anti-falling buckles, and provides a steel plant material anti-falling buckle which comprises a U-shaped connecting block and two long blocks, rotating rods are movably embedded in the two long blocks, the outer surfaces of the two rotating rods are movably sleeved with V-shaped balance weight rods, the outer surfaces of the two V-shaped balance weight rods are fixedly connected with balance weight blocks, and the balance weight blocks are fixedly connected with the U-shaped connecting block. The bottoms of the outer surfaces of the two long blocks are both fixedly connected with hook bodies, the tops of the outer surfaces of the two hook bodies are both fixedly connected with check blocks, and the two V-shaped balance weight rods are both located on the outer surfaces of the two check blocks. Then the V-shaped balance weight rod rotates around the rotating rod as the circle center, at the moment, after materials are hung in the hook body, one end of the V-shaped balance weight rod is always attached to the surface of the check block under the action of no external force through the gravity of the balance weight block, and goods hung by the hook body cannot easily fall off from the inside of the hook body.

This invention relates to the field of water sampling equipment technology, specifically disclosing a water body sampling device for testing wastewater in a steel plant. The device includes a sampling tube with a gripping ring fixedly connected to its top outer surface. When the drive rod rotates, it synchronously drives the mating disc at its bottom to rotate, causing the misaligned groove on the mating disc to intermittently connect with the water delivery tank on the chassis. The drive disc is constantly in an upward-moving state, thus intermittently increasing the negative pressure inside the sampling tube when extracting wastewater. This further enhances the negative pressure, allowing wastewater to enter the sampling tube faster when the water delivery tank is opened, significantly reducing the risk of blockage in the water delivery tank on the chassis. The enhanced negative pressure also absorbs common clumps of impurities accumulated at the bottom of the water delivery tank, improving the accuracy of subsequent testing and preventing a large amount of impurities from being filtered out and affecting the test data.