71results about How to "Improve economic efficiency" patented technology

The invention relates to the technical field of data storage, in particular to a dynamic data distribution storage method and system for an RAID (redundant array of independent disks), and the method comprises the following steps: based on the access frequency of data blocks in a disk, recording the access frequency and timestamp of each data block, carrying out heat rating on the data blocks, and determining thresholds of hot data and cold data. According to the method, the dynamic distribution of data storage is effectively optimized by analyzing the access frequency of the data blocks, and the performance and the economic efficiency of a storage system are remarkably improved by migrating the frequently accessed data to the cache disk and migrating the less accessed data to the low-cost storage; according to the method, unnecessary occupation of high-performance storage resources is reduced, the operation cost is also reduced, heat rating is performed on the data blocks, and the storage positions of the data blocks are correspondingly adjusted, so that the data processing speed is higher, meanwhile, the data security is improved, when a hard disk fails, data recovery is faster, and the service continuity is ensured.

The invention relates to the technical field of power grid monitoring, in particular to a power grid abnormal state monitoring and early warning system which comprises a historical reference establishment module, an operation deviation analysis module, an abnormal threshold adjustment module and an abnormal early warning module. According to the invention, through real-time data acquisition and historical data analysis, the monitoring and early warning efficiency of power grid operation is improved, and through collection of power grid operation records, extraction of data of differential time periods, evaluation and analysis of the average load and volatility of the data, and construction of a historical power grid operation reference, the operation trend and potential abnormity can be captured more accurately. The method reduces the uncertainty of judgment depending on experience, can recognize a deviation mode and an adjusted load detection threshold value by comparing current data with a historical reference, enables the abnormal early warning to be more accurate, avoids excessive false alarms and missed alarms, optimizes the evaluation of early warning levels and the implementation of early warning notification, guarantees the safety and stability of a power grid, and improves the safety and reliability of the power grid. And the economic efficiency and the reliability of power grid operation are also improved.

The invention discloses an energy storage capacity configuration method for a wind and light power generation system, and relates to the technical field of energy storage capacity optimization planning, and the method comprises the following steps: obtaining the average wind power and photovoltaic output data of an optimized region, and calculating the target output power of the wind and light power generation system; based on the target output power and the actual output power of the wind and light storage power generation system, calculating the energy storage capacity required to be configured by the wind and light storage power generation system; establishing a minimum cost objective function model of the wind-solar-energy-storage combined power generation system and setting an index constraint condition of output of the wind-solar-energy-storage combined power generation system; and obtaining an optimal energy storage capacity scheme of the wind-solar-energy-storage combined power generation system based on the minimum cost objective function model of the wind-solar-energy-storage combined power generation system and the output index constraint condition of the wind-solar-energy-storage combined power generation system, thereby solving the problem that a traditional energy storage capacity configuration method cannot configure more accurate energy storage capacity to better meet the requirements of the system. And the energy storage capacity optimization planning of the wind and light power generation system is realized.

The invention discloses a system and a method for preparing synthesis gas through methane self-heat-supply thermocatalysis coupled photothermal catalysis cascade reforming, and the method comprises the following steps: methane and oxygen are combusted in a combustion furnace, the generated high-temperature gas enters a first reactor after heat exchange, the temperature in the first reactor is maintained at 700-800 DEG C, the molar ratio of CH4 to CO2 is 1: (0.8-1.2), the temperature in the first reactor is maintained at 700-800 DEG C, and the temperature in the second reactor is maintained at 700-800 DEG C; carrying out a thermocatalytic dry reforming reaction; after the gas reacted in the first reactor is subjected to heat exchange through a second heat exchanger, the gas enters a second reactor, the temperature in the second reactor is maintained at 500-600 DEG C, the molar ratio of CH4 to CO2 is 1: (0.8-1.2), and a photo-thermal catalytic dry reforming reaction is carried out; high-temperature gas obtained after reaction in the second reactor enters a third heat exchanger for heat exchange and then enters a third reactor, the temperature in the third reactor is kept at 300-400 DEG C, the molar ratio of CH4 to H2O is 1: (0.8-1.2), and a second-stage photo-thermal catalytic reaction is carried out.

The invention provides a multi-tower series connection method and device for boron isotope separation, and relates to the technical field of isotope separation. According to the multi-tower series connection method for boron isotope separation, four stages of low-temperature rectifying towers which are sequentially connected in series are adopted to achieve low-temperature rectifying separation of boron isotopes at the specific temperature and pressure, tower bottom materials of the previous stage of rectifying tower serve as feeding raw materials of the next stage of rectifying tower, and materials of all stages of rectifying towers are conveyed through pumps; after rectification of the four-stage rectifying tower, a 10BF3 product with abundance greater than 99% can be extracted from the tower bottom of the ultimate rectifying tower; and condensing the gas-phase material at the top of each stage of rectifying tower into liquid through a condenser, extracting the 11BF3 light component, and mixing and collecting the 11BF3 light component through a collecting tank. The method and the device are operated under the normal pressure condition, the boron isotope product can be continuously produced, the energy consumption is low, the production speed is high, the technological operation is simple, no side reaction exists, the product impurity is few, the purity of the boron isotope separated product can be ensured, the cost is low, and the method and the device have good industry prospects.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a synthesis method of acetic acid 2, 2-difluoroethyl ester, which specifically comprises the following steps: under the catalysis of a reaction catalyst, continuously reacting 2-chloro-1, 1-difluoroethane, alkali metal acetate and a solvent at the reaction temperature of 140-200 DEG C, and carrying out solid-liquid separation and rectification treatment on a crude product after the reaction to obtain the acetic acid 2, 2-difluoroethyl ester. The synthesis method is simple in technological process and easy to operate, the synthesized acetic acid 2, 2-difluoroethyl ester is high in purity, the conversion rate of the reaction raw material alkali metal acetate is high, meanwhile, the solvent, the unreacted alkali metal acetate and the 2-chloro-1, 1-difluoroethane in the synthesis method can be repeatedly used, and the synthesis method is suitable for industrial production. The high conversion rate of the alkali metal acetate and the high selectivity of the acetic acid 2, 2-difluoroethyl ester are not influenced, the recovery cost and the reaction cost are greatly reduced, and large-scale chemical application is facilitated.

The invention relates to a method for quantitatively monitoring the pollution degree of groundwater. The method comprises the steps of near-infrared hyperspectral imaging, construction of a prediction model and fitting of a prediction function. The invention further provides a groundwater analysis system and application of the method. According to the method, a hyperspectral imaging technology is adopted to shoot a mixed sample of organic pollutants and water, key features of a sample image are obtained by combining an image preprocessing technology and a feature extraction technology, the sample features with remarkable performance are used as training data, and a machine learning algorithm is applied to obtain training data; the model can accurately predict the water-oil volume ratio in a sample, and meanwhile, provides spatial distribution of the organic pollutants in the environment, so that an efficient and innovative solution is provided for quantitative analysis of the organic pollutants.

The invention discloses an optimized operation method for a hydrogen refueling station to participate in a day-ahead market and a balance market. The method comprises the following steps: constructing an upper-layer hydrogen refueling station bidding quotation model; a lower-layer day-ahead market clearing model composed of an electric energy market, a standby market and a hydrogen energy market is established; establishing a lower-layer balance market clearing model based on the bidding quotation of each subject and the reserve capacity provided by each subject of the lower-layer day-ahead market clearing model; constructing a lower-layer overall clearing model based on the middle-lower-layer day-ahead market clearing model and the middle-lower-layer balanced market clearing model; converting the lower-layer overall clearing model into a group of constraint conditions by using a KKT condition, adding the constraint conditions into an upper-layer hydrogen refueling station bidding quotation model, and converting the upper-layer model and the lower-layer model into a single-layer model; and respectively linearizing nonlinear terms of the single-layer model through a strong dual theorem and a big-M method so as to convert the nonlinear terms into a mixed integer programming model and directly solve the mixed integer programming model through a solver. According to the invention, the flexible resource regulation potential of the hydrogen refueling station is fully exploited, the flexibility of market transaction is improved, and the income of the hydrogen refueling station is increased.

The invention provides a self-adaptive welding method for a bracket special for a freeze-drying barrel, and belongs to the field of laser welding. The self-adaptive welding method for the support special for the freeze-drying barrel comprises the steps of assembling the self-adaptive welding system for the support of the freeze-drying barrel, calculating the variable quantity of a welding gap, setting the range of the welding gap, selecting the diameter of a welding wire, installing a workpiece, adjusting the gap and starting welding. The non-uniform gap interface self-adaptive welding system comprises a rotating assembly, a pressing assembly, a workbench, a multi-axis moving device, a laser filler wire welding system, a visual inspection system and a control system. The size of a welding connector gap between a freeze-drying barrel and a support is detected in real time through a visual detection sensor, the moving speed of a multi-axis moving device is adjusted in real time, and a laser welding gun of a laser wire filling welding system is driven to achieve the welding speed self-adaptive welding process, so that wire filling and heat input at different positions of a welding connector are matched with the size of the gap, and the welding speed self-adaptive welding effect is achieved. A stable and reliable welding seam is obtained through one-time welding of a non-uniform gap connector.

The invention provides a method for assisting and strengthening a chemical reaction of a flow battery based on local ultrasound, which comprises the following steps of: (1) arranging ultrasonic transducers on bipolar plates of a positive half battery and a negative half battery of the flow battery, the arrangement position of the ultrasonic transducer on the bipolar plate and the size of the ultrasonic transducer enable the action area of ultrasound applied by the ultrasonic transducer to cover the flow dead zone in the porous electrode; (2) connecting a signal generator with an ultrasonic transducer through a power amplifier; and (3) in the operation process of the flow battery, starting the signal generator and the power amplifier to apply ultrasound to the flow battery through the ultrasonic transducer, and improving the flow velocity and the flow uniformity of the electrolyte in the porous electrode by utilizing the ultrasound so as to strengthen the chemical reaction of the flow battery. According to the method, the flow uniformity of the electrolyte in the porous electrode can be effectively improved, the flexible regulation and control of the flow field in the porous electrode of the flow battery are realized, and the ultrasonic power consumption of the regulation and control of the flow field in the electrode is reduced.

The invention discloses a transmission tower modular foundation with multi-dimensional energy dissipation function and an energy dissipation method thereof, which relates to the technical field of transmission line foundation, including: a base plate, a step module and a column; the step module includes a vibration reduction module, and the vibration reduction module includes an energy dissipation top layer, an energy dissipation middle layer and an energy dissipation lower layer; in the energy dissipation top layer, the vibration of the elastic rope is stimulated by the collision of the ball and the rotation of the turntable, and the reciprocating motion of the elastic rope is driven by the elastic rope retracting device to dissipate energy; in the energy dissipation middle layer, the vibration of the elastic rope drives the annular rack to move linearly, thereby driving the rotation of the blade through the spiral pair and cutting the viscous damping liquid to dissipate energy; in the energy dissipation lower layer, the sliding of the slider drives the movement of the mass block in the shear thickening liquid and drives the vibration of the elastic rope to dissipate energy. While ensuring that the transmission tower foundation is easy to transport and install, the earthquake resistance and wind vibration resistance of the transmission tower foundation are improved, the transmission tower line is assisted to dissipate wind vibration energy, and the damage to the transmission tower caused by vibration is reduced.

The invention discloses a grading utilization device for residual energy of a coal gasification device. The grading utilization device comprises a residual pressure energy recycling unit, a spiral residual heat recycling unit, a positive pressure flash evaporation residual heat power generation unit, a negative pressure flash evaporation residual heat power generation unit, a gasification ash water recycling unit and an organic medium power generation unit, the invention further discloses a method for graded utilization of the coal gasification complementary energy through the device. According to the device, the residual pressure energy and spiral residual heat recycling unit and the positive pressure flash evaporation and negative pressure flash evaporation residual heat power generation unit are arranged to convert residual heat energy and residual pressure energy carried by coal gasification product high-temperature crude synthesis gas and high-pressure black water into heat energy and electric energy respectively, so that the residual heat energy and the residual pressure energy are recycled; meanwhile, a waste heat power generation set replaces a heat exchanger to recover waste heat energy, a residual pressure energy recoverer replaces a pressure reducing valve to recover residual pressure energy, and the power capacity increasing cost of the whole gasification device and the heat exchange circulating water consumption of the device are effectively reduced; the method improves the energy utilization efficiency and is suitable for the field of coal gasification.

The invention relates to a method for early warning of the development state of road internal voids, an electronic device and a storage medium, and belongs to the technical field of road internal monitoring. In order to solve the problem of timely and accurate early warning of road internal voids, the invention includes using a three-dimensional ground penetrating radar to collect road internal images, annotating the collected images, obtaining a data set for road internal void identification, constructing a road internal void identification model, constructing a loss function between a basic model, an auxiliary model, a first reinforcement model and a second reinforcement model for road internal void identification, and constructing an overall loss function; using the data set for road internal void identification to train the basic model, the auxiliary model, the first reinforcement model and the second reinforcement model for road internal void identification, and obtaining a trained basic model for road internal void identification as a road internal void intelligent identification model; constructing a digital twin model based on the road internal void intelligent identification model; and establishing a method for early warning of the development state of road internal voids.

The application discloses a kind of online detection steel billet shape and accurate cutting device and method, belong to steel billet production process technical field.The present application includes steel billet cutting machine, computer control system, laser range finder and steel billet weighing equipment, laser range finder is equipped with two, respectively is set in the two sides of steel billet to be cut, and two laser range finders are all installed in cooling protection equipment, for the shape of real-time online detection steel billet to be cut;The steel billet weighing equipment is used to weigh after cutting steel billet;Steel billet cutting machine, laser range finder and steel billet weighing equipment are all connected with computer control system.The technical scheme of the present application can be online real-time to judge whether steel billet is deformed, then timely cut off the steel billet that appears problem, greatly improve the quality of steel billet, simultaneously can also be online continuously corrected the real density of steel billet, realize accurate cutting steel billet's function, greatly improve the economic efficiency of enterprise.

The invention provides a modular intubation bridge plug which comprises an intubation assembly, a bridge plug assembly and a functional module assembly, and the intubation assembly comprises an intubation and an intubation releasing injection device connected to the lower portion of the intubation; the bridge plug assembly is movably arranged on the periphery of the insertion pipe assembly in a sleeving mode, and the lower portion of the bridge plug assembly is detachably connected with the functional module assembly. The functional module assembly comprises any one of a squeezing device, a sealing layer screwed plug and a hanging lower connector, and when the bridge plug assembly is connected with the squeezing device, high-pressure plugging agent squeezing construction is achieved; when the bridge plug assembly is connected with the sealing layer screwed plug, bridge plug sealing layer construction is achieved; when the bridge plug assembly is connected with the suspension lower connector, suspension clamping and sealing construction is achieved. According to the intubation bridge plug provided by the invention, a plurality of different purposes such as reservoir plugging, tail pipe hanging, clamping and sealing can be realized at the same time.

The present invention provides a fluororesin sheet coating device, which is used to automatically coat the fluororesin sheet with a liquid to produce chemical etching to modify its surface, and includes a conveying wheel that carries the fluororesin sheet in a rotating manner, and a coating machine arranged below the conveying wheel, the coating machine has a platform corresponding to the conveying wheel, and at least one slit channel that runs through the coating machine, wherein a micro gap is maintained between the platform and the corresponding conveying wheel to provide the liquid to flow in from the outlet of the slit channel to fill it; thereby, the fluororesin sheet is driven by the rotation of the conveying wheel to pass through and contact the liquid to produce capillary action and be attached. The present invention is simple and easy to implement, and can be fully introduced into automated production operations to improve economic efficiency.

The invention discloses a service-state austenitic stainless steel metallographic corrosive agent and a metallographic structure display method. The corrosive agent comprises the following raw materials: 1 g of copper sulfate, 1 g of sodium pyrosulfite, 1.5 g of sodium dodecyl benzene sulfonate, 1.5 g of hexamethylenetetramine, 8-12 ml of concentrated hydrochloric acid and 35-40 ml of deionized water. The corrosive agent disclosed by the invention has a good adaptation effect on austenite structures with different service degrees, so that the corrosion time and the eroded structure condition are easier to master, and the conditions of excessive corrosion and over-light corrosion are not easy to occur. Meanwhile, the grain boundary, the intragranular phase and the grain boundary precipitated phase, especially the sigma phase can be clearly displayed, and detection personnel can conveniently obtain key information such as the grain size level and the structure aging level. The corrosive disclosed by the invention is simple and cheap to prepare, the used proportioned raw materials are relatively high in safety degree, if the corrosive is carelessly adhered to the skin in an erosion process, the corrosive can be immediately cleaned by water or alcohol, the use risk is small, and the corrosive basically does not cause damage to the skin.

The catalytic reaction module comprises a supporting frame, a plurality of supporting plates are arranged on the supporting frame, and the supporting plates are arranged on the supporting frame; a reaction box is arranged on each supporting frame in a sliding manner, and a locking assembly matched with the reaction box is further arranged on each supporting plate; the reaction module further comprises an air inlet pipe and an exhaust pipe, one end of the air inlet pipe is communicated with an external air source, and the other end of the air inlet pipe is connected with the inlet end of each reaction box in parallel; one end of the exhaust pipe is connected with the hydrogen storage device, and the other end is connected in parallel with the outlet end of each reactor; a hydrogen sensor and a flow sensor are also arranged at the outlet end of each reaction box and are electrically connected with the controller respectively; independent packaging of the catalyst is achieved through the modularized reaction box, the catalyst can be replaced by replacing the whole reaction box, the reaction box can be filled with the catalyst again, reutilization is achieved, and the replacement efficiency of the catalyst is effectively improved.

The utility model relates to the technical field of greenhouse planting, in particular to a greenhouse heat preservation quilt winding device. Comprising a greenhouse body, a box body is fixedly connected to the top of the greenhouse body, a motor is fixedly connected into the box body, an output shaft of the motor penetrates through the front wall of the box body and is fixedly connected with a driving gear, two driven gears meshed with the driving gear are arranged below the driving gear, and rotating shafts rotationally connected with the box body are fixedly connected to the rear sides of the driven gears; the outer side of the rotating shaft is fixedly sleeved with a fixed roller located in the box body, and a heat preservation quilt is wound around the outer side of the fixed roller. In order to solve the problems in the prior art, the utility model provides the greenhouse heat preservation quilt winding device which is time-saving, labor-saving, low in labor intensity and high in efficiency in the paving and winding processes; meanwhile, solar energy resources are utilized, and electric energy is saved.

The invention relates to the technical field of engineering spoil geotextile laying, in particular to mountain pile type engineering spoil geotextile laying and pressing equipment which is composed of a caterpillar band moving mechanism, a geotextile laying mechanism and a geotextile pressing mechanism, the caterpillar band moving mechanism is provided with the geotextile laying mechanism and the geotextile pressing mechanism, and the geotextile laying mechanism and the geotextile pressing mechanism are arranged on the caterpillar band moving mechanism. A geotechnical cloth pressing mechanism is arranged at the front end of the geotechnical cloth laying mechanism, the crawler belt moving mechanism comprises two sets of fixing supports, a first fixing shaft, a second fixing shaft and a third fixing shaft are fixedly installed between the two sets of fixing supports, and the third fixing shaft is arranged above the first fixing shaft and the second fixing shaft. According to the equipment, automatic machinery is adopted for laying, geotechnical cloth moves up and down on small mountain pile type engineering spoil through the crawler walking mechanism, the labor intensity of workers is greatly reduced, and the laying efficiency is improved.

The present application relates to the field of geotechnical engineering foundation treatment, in order to improve the calculation efficiency of pile spacing, provide a kind of gravel pile spacing calculation method, system, device, storage medium and product, by obtaining correction coefficient, pile diameter, soil thickness before processing, soil thickness after processing;Based on not considering vibration subsidence and considering the treatment volume of soil body of enlarged pile diameter, and the treatment volume of soil body when considering vibration subsidence and the pile diameter is unchanged, the two are equivalent, calculate the gravel pile spacing, without obtaining soil porosity ratio through experiment, the soil thickness before and after processing is obtained conveniently, so as to simplify the calculation process;It can quickly calculate the pile spacing before preliminary design, significantly save working time;Improve economic efficiency, reduce the cost of early exploration.

The invention relates to the technical field of magnesium-based alloy manufacturing data processing, provides a magnesium-based alloy quality rating and recommending method, and aims to solve the problem of inaccurate quality rating caused by raw material component fluctuation and test condition difference in the existing magnesium-based alloy manufacturing process. The method comprises the following steps: constructing a preprocessing data set and performing feature extraction and integration by obtaining magnesium-based alloy preparation historical tasks, raw material components, performance test, test conditions, test equipment information and operator skill level data; and training and establishing a quality rating model by using a neural network model, and identifying the influence of raw material components and test conditions on the alloy quality. And through simulation and optimization, preparation parameters matched with the real-time magnesium-based alloy quality grade are obtained and serve as recommended parameters. According to the method, the accuracy of magnesium-based alloy quality rating is improved, and a magnesium-based alloy recommendation method is provided.

The utility model provides an external electric valve motor temperature reducing device, including the fin, the inside of fin is equipped with semiconductor radiator, and semiconductor radiator is contacted with the outer surface of electric valve motor, the end surface of fin is fixed with the batten, and the fan is installed on the batten, and the air direction of fan is towards the fin, the utility model provides an external electric valve motor temperature reducing device can cool down motor, guarantees normal operation.

The present application relates to remote sensing technology and ecological environment restoration evaluation technical field, especially in kind of based on multi-source remote sensing data's mine ecological restoration project achievement evaluation method.The method includes the following steps: to collect mine restoration area carries out multi-source remote sensing data cooperation collection and pretreatment, obtains the noise reduction data set;The multi-dimensional cooperative sensing processing is carried out to the noise reduction data set, and the multi-dimensional cooperative sensing data set is obtained;The soil spectrum feature separation extraction is carried out to the multi-dimensional cooperative sensing data set, and the soil spectrum feature data are obtained;The ground temperature distribution map is calculated according to the soil spectrum feature data;The surface soil moisture content inversion is carried out according to the soil spectrum feature data and the ground temperature distribution map, and the surface moisture content distribution map is obtained;The deep soil moisture content estimation is carried out according to the surface moisture content distribution map, and the soil moisture profile data are obtained.The present application improves the restoration input benefit by quantitative inversion of soil physical parameters and dynamic analysis of rainfall response process.

The present invention discloses an electric milking device, including a mounting frame and a first milking mechanism mounted on the mounting frame, a second milking mechanism and a driving mechanism for driving the first milking mechanism to move, the first milking mechanism including two milking claws both mounted on both sides of the upper end of the mounting frame by rotating a shaft, a milking baffle is fixedly mounted on one end of the two milking claws close to the shaft, and a pressing plate is arranged on the inner side of one end of the two milking claws away from the shaft, and a tension spring is connected between the two milking baffles; the driving mechanism includes a driving motor fixedly mounted on the mounting frame, a transmission shaft is fixedly mounted on the output shaft end of the driving motor, a first cam is fixedly mounted on the transmission shaft, and the first cam conflicts with the inner wall of the milking baffle, and the present invention also provides an electric milking method. The present invention realizes the automatic collection of milk samples, reduces the labor intensity of operators, improves the detection efficiency, and thus indirectly improves the economic benefits of the farm.

The present invention discloses a device for the coordinated granulation of sintering dust ash and molten steel slag, comprising a tundish, the side wall of which is connected to a combined long flow nozzle; the combined long flow nozzle is connected to a closed granulation bin, and a supersonic wind quenching nozzle is arranged below the combined long flow nozzle; a powder storage box is arranged at the upper left of the closed granulation bin, and a telescopic rotating powder spray gun is arranged at the outlet of the powder storage box; the right side of the closed granulation bin is connected to an exhaust dust removal fan, and a slag particle collection device is arranged at the lower part of the inner cavity of the closed granulation bin; an air inlet is arranged on the left side wall of the closed granulation bin, and a slag outlet is arranged at the lower part of the right side wall of the closed granulation bin. The method for using the device comprises the steps of opening the air inlet and the exhaust dust removal fan, opening the combined long flow nozzle and the supersonic wind quenching nozzle, opening the telescopic rotating powder spray gun, and discharging slag. The present invention realizes the coordinated treatment of two solid wastes, dust ash and steel slag, and improves the comprehensive economic efficiency of the waste heat recovery system. The method is simple and convenient.

The invention provides a carbon dioxide hydrogenation catalyst as well as a preparation method and an application method thereof. The catalyst comprises nickel or ruthenium combined with copper-zinc oxide-aluminum oxide, and based on the total mass of the carbon dioxide hydrogenation catalyst, the mass percent of copper is 53-59%, the mass percent of zinc oxide is 23-30%, the mass percent of aluminum oxide is 11-17%, and the mass percent of nickel or ruthenium is 1-20%. The catalyst provided by the invention can resist ammonia poisoning and realize high carbon dioxide hydrogenation activity.

The utility model relates to the technical field of building construction, in particular to a safety warning board for construction site management, which comprises a device base, a circular column is fixed on one side of the device base, an insertion rod is movably inserted in the circular column, a spring is arranged on the surface of the insertion rod, a movable column is movably inserted at the top end of the device base, and a movable rod is arranged on the top end of the movable column. A preformed hole is formed in the surface of the moving column; a connecting block is fixed to the top end of the moving column, fixing plates are fixed to the front side and the rear side of the connecting block, a transparent plate is fixed to one side of each fixing plate, and a warning board is movably inserted between the transparent plate and the fixing plate. Through cooperative use of the transparent plate, the movable plate, the fixed plate, the first magnet and the second magnet, the warning board can be replaced and taken out, and slogans can be replaced in time according to specific conditions of a construction site and different construction stages.

This utility model provides a thermostat with inlet and outlet water pipes, including an upper body. The upper body is provided with a water channel and an electrical circuit. The water channel includes a lower inlet pipe, a horizontal inlet pipe, a horizontal return pipe, and an upper inlet pipe. The lower inlet pipe is connected to the horizontal inlet pipe, and the upper inlet pipe is connected to the horizontal return pipe. The advantages of this utility model are: it integrates the center outlet pipe and the side outlet pipe into an F-shape, so that the center outlet and side outlet functions can be realized without disassembling the thermostat's iron bracket during the assembly and use of the whole machine. The structure is simple, the installation is convenient and easy, saving labor and time, and significantly improving economic efficiency.

The utility model belongs to the technical field of sewage treatment application, and particularly discloses a spiral conveying and squeezing all-in-one machine which is composed of a driving motor, a conveying section and a squeezing section, and the conveying section comprises a transverse conveying shell, a plurality of vertical supporting parts, a feeding port and a shaftless spiral; the squeezing section comprises a squeezing shell, a water collecting tank, a slag outlet, a water outlet, a punching net plate and a spiral with a shaft; wherein the length size of the transverse conveying shell is larger than that of the squeezing shell, the length size of the shaftless spiral is larger than that of the shaft spiral, and the connecting face of the transverse conveying shell and the squeezing shell is of a detachable structure. The utility model has the beneficial effects that the integrated structural design is adopted, and the installation and the construction are convenient through a horizontal installation mode; solids in a pump station, a catch basin and the like can be quickly conveyed and squeezed, so that the economic cost and the efficiency of sewage treatment are improved; and the fixed pressing plate, the elastic brush seat and the brush can be used for cleaning solids on the perforated mesh plate, so that blockage is prevented.