321results about How to "Precise pressure control" patented technology

The invention relates to an active hydraulic suspension shock absorber which comprises an inner pipe, an outer pipe, a guider assembly, a piston, a piston rod, a suspension seat, a first electromagnetic valve assembly, a second electromagnetic valve assembly and an energy accumulator. Meanwhile, the first electromagnetic valve assembly, the second electromagnetic valve assembly and the energy accumulator are integrated in one part, the production efficiency is improved, the production and machining technology is simplified, the shock absorber can provide the best suspension performance under various driving conditions through the integrated electromagnetic valve assemblies and an optimized hydraulic control strategy, and the service life of the shock absorber is prolonged. And the dual requirements of modern automobiles on comfort and controllability are met.

The invention discloses a CTC cell detection method based on a micro-fluidic chip, and belongs to the technical field of cell treatment. In order to solve the problems of high false positive and false negative rates, time consumption and low efficiency caused by difficulty in accurately distinguishing CTC from other cell types, the invention can efficiently and specifically capture CTC cells, reduce the possibility of false positive and false negative and improve the detection accuracy by constructing a specific capture chamber and filling specific antibodies and immunomagnetic beads. The multi-channel design allows a plurality of samples to be processed at the same time, the detection efficiency is improved, the micro-fluidic chip technology integrates a plurality of steps on one platform, automation and standardization of operation are achieved, personal errors are reduced, the stability and repeatability of detection are improved, the uniformity and stability of the detection process are ensured, and the detection efficiency is improved. The fluorescence imaging technology clearly displays CTC and obtains key parameters such as quantity, form and fluorescence intensity of CTC, thereby providing powerful support for cancer diagnosis and research.

The utility model discloses a tensile test device for detecting the toughness and the tensity of a film, and belongs to the field of film detection devices. A tensile test device for detecting toughness and tensity of a film comprises a base, an I-shaped frame, a mounting frame and scale marks are sequentially fixed to the upper side of the base, and a bidirectional driving mechanism is fixed to one end of the mounting frame; according to the utility model, through the cooperation of the bidirectional driving mechanism, the clamping assembly, the reciprocating driving assembly, the pressing roller and the scale marks, the comprehensive detection of the toughness of different parts of the film is realized, the bidirectional driving mechanism can control the opening degree of the film, and the reciprocating driving assembly enables the pressing roller to carry out pressing detection at different positions of the upper surface of the film; in addition, due to the arrangement of the scale marks, a detection part can be accurately positioned conveniently, the tension and pressure sensor is combined to monitor the stress condition of the thin film, the toughness and the tension degree of the thin film can be detected, and diversity of the detection process is achieved.

According to the energy storage coupling heat pump steam generation method and system, the mode that the heat pump device and the energy storage device cooperatively operate is adopted, and efficient and economical steam supply is achieved. The method comprises the steps that high-temperature water is prepared and stored in the off-peak electricity period through the heat pump device, and the high-temperature water is further heated through the energy storage device to generate superheated steam for a user to use. The energy storage device comprises a plurality of energy storage modules, and a heat exchange pipeline of the energy storage device can be switched between a parallel connection mode and a series connection mode through switching, so that deep heat release and flexible regulation and control are achieved. According to the method, the energy storage capacity and heat release power of the energy storage module are dynamically adjusted, enthalpy increment distribution of the heat pump and the energy storage device is optimized in combination with load prediction, and diversified steam requirements are met. And meanwhile, preheating or dynamic supplement is conducted on the energy storage module through the heat pump device, waste heat recovery is achieved, and the energy efficiency is improved. According to the method, the operation cost is remarkably reduced, the capacity of the system for adapting to load fluctuation is enhanced, and the method is suitable for industrial steam use scenes and has the advantages of being efficient, stable and flexible.

The invention discloses a rapid development method and system for a high-performance nodular cast iron material based on electronic metallurgy, and relates to the technical field of electronic metallurgy, and the rapid development method comprises the steps that a high-performance nodular cast iron raw material is smelted through multi-stage electron beams, and uniform molten metal is obtained; monitoring the chemical components and temperature change of the molten metal in real time, and dynamically adjusting the addition of the spheroidizing agent; the pouring speed and pressure of the molten metal subjected to spheroidizing treatment are intelligently controlled, and casting pouring is conducted; the internal stress change of the casting is monitored in real time through an embedded stress sensor, and the casting cooling process is adjusted; the cooled casting is subjected to surface treatment, heat treatment and machining; component detection and performance testing are conducted on the casting obtained after treatment and machining are completed; through the multi-stage electron beam melting technology, accurate control over the temperature and chemical components of the molten metal is achieved, and the uniformity and stability of the molten metal are ensured.

The invention provides an electric overflow valve and a pressure control method thereof.The electric overflow valve comprises a valve body assembly, an energy accumulator and a pressure regulating assembly, a valve cavity allowing a valve element to reciprocate is formed in the valve body assembly, a liquid inlet and a liquid return opening are formed in the valve cavity, and the valve element divides the valve cavity into a first cavity and a second cavity; the valve core reciprocates to realize different opening degrees; an energy storage cavity is formed in the energy accumulator, the pressure adjusting assembly comprises a driving device, a control part and a pressure adjusting part, the driving device is connected with the pressure adjusting part, at least one part of the pressure adjusting part is in threaded connection with the valve body assembly, one end of the pressure adjusting part communicates with the first cavity and is used for changing the pressure in the first cavity, and the control part is in signal connection with the driving device. The control device can control the driving device to move so as to maintain the pressure in the first cavity within a preset range; therefore, the pressure signal is used as an input signal to control the driving device to drive the pressure regulating part to rotate, accurate pressure control is achieved, and remote programmed pressure regulation of the overflow valve is completed.

The invention discloses an automotive liquid ammonia supply system which comprises a liquid ammonia storage tank, a liquid outlet and a gas outlet are formed in the liquid ammonia storage tank, the liquid outlet is connected with one end of a filling pipeline and one end of a liquid outlet pipeline, a stop valve and an electromagnetic valve are connected to the liquid outlet pipeline in series, the other end of the liquid outlet pipeline is connected with a first medium inlet of a water bath type vaporizer, and a second medium inlet of the water bath type vaporizer is connected with a second medium inlet of the water bath type vaporizer. A first medium outlet of the water bath type vaporizer is connected with an inlet of the buffer tank, an outlet of the buffer tank is used for providing ammonia gas, one end of the gas return pipeline is connected with the gas outlet, a pressure gauge, a stop valve and a safety valve are connected to the gas return pipeline in series, and a second medium inlet and a second medium outlet of the water bath type vaporizer are used for being connected with an engine cooling liquid outlet and an engine cooling liquid inlet respectively. And a saturation pressurization pipeline is further arranged, an electromagnetic valve and a heat exchange pipe located in the liquid ammonia storage tank are connected to the saturation pressurization pipeline in series, and two ports of the saturation pressurization pipeline are used for being connected with an engine cooling liquid inlet and an engine cooling liquid outlet respectively. The liquid ammonia gas supply system for the vehicle can stably supply gas to the vehicle.

The invention discloses a vehicle and a solid-state battery system thereof, and relates to the technical field of solid-state batteries. The solid-state battery system comprises at least one solid-state battery module, a pressure adjusting module and a gas providing module, and the solid-state battery module comprises a plurality of solid-state batteries, a battery management module, a pressure sensing module and a pressure control module which are sequentially arranged and electrically connected. The battery management module is used for respectively controlling the working states of the pressure adjusting module and the pressure control module according to the pressure information between the solid-state batteries sensed by the pressure sensing module, so that the pressure between the solid-state batteries is within a preset pressure range, and the stability of the working performance of the solid-state battery module is ensured. Meanwhile, the vehicle comprises the temperature adjusting module, the temperature adjusting module comprises the air compressor, and the air compressor is reused as the gas providing module, so that the structure of the solid-state battery module is simplified, and the structure of the solid-state battery system is simplified.

The invention relates to the technical field of metal processing, and discloses a hot press molding process for metal product manufacturing, which comprises the following procedures: S1, raw material preparation, S2, mold design and manufacturing, S3, preheating treatment, S4, hot press molding, S5, cooling and demolding, S6, post-treatment and S7, packaging and storage.The process can improve the product quality, and the product quality is improved through strict raw material preparation; according to the die, impurities are removed, the size precision is ensured, a foundation is laid for high-quality products, the shape and size precision of the products is ensured, the consistency and reliability of the products are improved, the hot-press forming process is optimized, the temperature, pressure and time are accurately controlled, a die cavity is fully filled with metal materials, internal defects of the products are reduced, and the product quality is improved. The mechanical property of the product is improved, meanwhile, the production efficiency is improved, the hot press forming difficulty is reduced through the reasonable preheating treatment and the segmented pressurizing and heating mode, and the forming speed is increased.

The invention relates to the technical field of leather processing, in particular to a leather forming processing device for automotive trim. The device comprises a pretreatment device and a mold device, the rear side of the mold device is connected and provided with a trimming device, the front side of the mold device is connected and provided with a heating device, and the mold device is internally provided and connected with a cooling device. The pretreatment device is used for improving the quality and the processing efficiency of leather, improving the consistency of products and effectively shortening the production cycle, the mold device is used for forming the leather, ensuring the size accuracy and effectively improving the consistency of the products, and the heating device is used for softening the leather, facilitating subsequent processing, improving the process effect and effectively improving the quality of the products. The cooling device is used for rapidly cooling leather, stabilizing the size and effectively improving the product precision, the trimming device is used for finely adjusting the leather and improving the finished product quality, and the safety monitoring device is used for guaranteeing the safety of the machining process and effectively improving the operation safety.

The invention discloses a pressure control method, device, equipment and medium for semi-combination points of double clutches. The method comprises the following steps: acquiring a first pressure of a historical round in a self-learning process of a semi-combination point of the double clutch; when the system main oil pressure is set to the maximum value, the pressure of the double clutch is adjusted with the first pressure as the target; with the second pressure as the target, the pressure of the double clutches is adjusted, and the target current when the double clutches are maintained at the second pressure is obtained; with the first pressure as a target, the pressure of the double clutches is adjusted, and the initial current when the double clutches are maintained at the first pressure is obtained; the double clutches are adjusted to reach the target current from the initial current, and real-time pressure change data of the double clutches in the adjusting process are obtained; according to the real-time pressure change data of the double clutches, the maximum pressure slope is determined; according to the maximum pressure slope, whether the first pressure of the half-combination point of the double clutches is adjusted or not is detected. According to the embodiment of the invention, the accuracy of self-learning of the half-joint points of the double clutches can be improved.

The invention relates to the technical field of medical instruments, and particularly discloses a pressure self-adaptive adjusting method and treatment device.The pressure self-adaptive adjusting method comprises the following steps that an air compressor is started to inflate an air storage tank, and the first actual pressure in the air storage tank is detected in real time; comparing whether the pressure difference between the first actual pressure and the target pressure reaches a first pressure threshold value or not; if the first pressure threshold value is reached, calculating a first time required for reducing the pressure in the air storage tank to a second pressure when the treatment handle works; and if the first time is larger than a set time threshold value, operation of the air compressor is stopped, and if the first time is smaller than the set time threshold value, operation of the air compressor is kept. Therefore, the pressure in the air storage tank is accurately controlled, the start and stop of the air compressor are accurately controlled under the condition that the air supply pressure and the air supply amount meet reasonable intervals, and the noise of the treatment equipment and the standby electric quantity loss are reduced.

The invention discloses an interference bushing press-in method which comprises the following steps: S1, designing and manufacturing a bushing press-in device matched with a to-be-mounted metal part in shape and structural characteristics; s2, the lining device is placed in liquid nitrogen to be frozen for 20-30 minutes, so that the magnitude of interference generated by low-temperature shrinkage of the lining device is reduced, and follow-up assembly is facilitated; s3, a to-be-mounted metal part is fixed to the stable platform, the frozen lining device is connected with the to-be-mounted metal part, and a bolt of the lining device penetrates through the to-be-mounted metal part; s4, press-in operation is conducted through the lining device, so that the shoulder lining of the metal part to be installed is attached to a gasket of the lining device, and the nut is screwed down; and S5, after press-in is completed, the lining device is removed, visual detection is conducted on the shoulder lining, and whether deflection exists or not is determined. Through the designed press-in tool, the pressure applied to the bushing can be accurately controlled, the problem that the bushing deflects due to uneven hammering force is solved, and therefore the accuracy and reliability of installation are improved.

The invention discloses a vacuum system for precisely controlling the gas density of a nano-dose detector, and belongs to the field of ionizing radiation nano-dose measurement. The system comprises a vacuum pump set unit, a vacuum degree detection unit and a logic control unit. According to the requirements of the nano dose detector for the vacuum degree and the gas concentration, the working air pressure is within 1 Torr and the air pressure control precision reaches 0.01 Torr through cooperation of a pump set in a vacuum system and PLC logic control and data monitoring. The system can provide gas for generating ionizing radiation and a low-vacuum environment for the nano-dose detector, and ensures that a measurement signal of the nano-dose detector is accurate and stable. The ionization degree of the nano dose detector depends on the vacuum degree in the cavity, and the vacuum degree of the cavity depends on the concentration of gas in the sensitive volume. The method has the advantages of high precision, high accuracy, high reliability and the like. According to the invention, the vacuum environment of the nano-dose detector is constant, the sensitive gas is single, and the precise measurement of the nano-dose detector can be supported.

The invention discloses a flow meter detection device based on a volumetric method, and belongs to the technical field of meter detection. The measuring mechanism comprises an oil inlet pipe, a flow meter body, an inflow pipe, measuring tanks, an overflow mechanism, an outer sleeve, a piston disc, an extending sleeve, a follow-up rod, a pressing block, a lateral sleeve, a transverse rod and a fixing mechanism, one end of the oil inlet pipe is connected to the oil tank, the other end of the oil inlet pipe is connected to the inflow pipe, the inflow pipe is connected to the side walls of the two measuring tanks, and the overflow mechanism is connected to the outer sleeve. The flow meter body is installed on an oil inlet pipe, the overflow mechanism is installed on an oil tank, the outer sleeve is coaxially installed on a measuring tank, the influence of gas pressure is avoided through the design of an air inlet hole, convenient manual control is provided through the combination of a follow-up rod and a pressing block, and the multi-stage positioning function is achieved through the cooperation of a lateral sleeve and a transverse rod. By means of the multi-structural design, the measurement accuracy and repeatability of flow measurement are remarkably improved.

The invention relates to the technical field of industrial manufacturing, and discloses an efficient cooling and shaping system for core rod production and processing, comprising: a core rod cooling path design module for designing a multi-channel cooling path inside a core rod and an external spray cooling path; the temperature sensing and monitoring module is used for collecting temperature data inside and on the surface of the core rod in real time; the intelligent control module is used for dynamically generating cooling parameters based on the target temperature and the current temperature of the core rod; and the cooling execution and feedback module is used for adjusting the flow rate of the cooling liquid, the spraying pressure and the spraying direction according to the cooling parameters generated by the intelligent control module. By optimizing an internal cooling path and an external spray cooling design of the core rod, efficient and uniform cooling is realized so as to shorten the shaping time; the precise temperature control and partition cooling technology is combined, thermal stress and deformation are effectively reduced, and the machining precision is improved; and meanwhile, the operation cost is reduced through dynamic energy consumption optimization and cooling liquid circulation, and the green and energy-saving targets are achieved.

The invention discloses an automatic water replenishing system and method for a clean water tank, relates to the technical field of water level control, and aims to solve the problem that the water replenishing of the clean water tank needs manual operation and valve control and water supply pressure control, the automatic water replenishing system comprises the clean water tank and a water supply pipeline, and further comprises a collection module arranged in the clean water tank and the water supply pipeline, detecting the liquid level of a clean water tank and pipe network pressure; the control module is electrically connected with the regulating valve at the front end of the clean water tank and controls the opening degree of the regulating valve according to the liquid level of the clean water tank and the pipe network pressure; the detection module detects whether the detection acquisition module fails or not and detects the liquid level state of the clean water tank and the pressure state of a pipe network; the interaction module interacts with the control module, sets system working parameters and displays information acquired by the acquisition module and the detection module; according to the automatic water supplementing system for the clean water tank of the water plant, the opening degree of the valve is controlled through differential pressure change PID adjustment, accurate pressure and liquid level control and monitoring can be achieved, when water used by a user changes, the valve can be automatically adjusted to guarantee the pressure of a pipe network, automatic water supplementing of the clean water tank is achieved, manual adjustment is not needed, and the labor cost is saved.

The invention provides a density relay automatic verification system and method, a medium, a product and a host. The verification system comprises a computer host, a number identification module, a positioning module, an intelligent verification control module, a vacuum pumping module and an inflation and deflation module. Scanning a bar code of each to-be-verified density relay to identify a corresponding instrument number, and respectively creating a verification report of each to-be-verified density relay; in response to the verification starting signal, the intelligent verification control module controls the vacuum pumping module to perform vacuum degree verification on each to-be-verified density relay, and controls the inflation and deflation module to perform action point verification and pointer indicating value verification on each to-be-verified density relay; and according to the vacuum degree verification image data, the action point verification image data and the pointer indicating value verification image data returned from the intelligent verification control module, a verification report of each to-be-verified density relay is generated and output, and automation of the whole verification process is realized.

The invention belongs to the technical field of fine chemical synthesis, and discloses a continuous micro-channel chloroethylene carbonate synthesis method, which comprises: 1, introducing a gas-state reactant into a first pipe through a gas inlet, and introducing a liquid-state reactant into the first pipe through a liquid inlet; 2, the gaseous reactant pushes the liquid reactant to enter the reaction tube of the reactor from the first tube, and a reaction is carried out under the condition that the ultraviolet lamp tube emits ultraviolet light and irradiates the reaction tube, and a gas-liquid mixture containing a target product is obtained; and 3, enabling the gas-liquid mixture to flow through a gas-liquid confluence inlet and a gas-liquid confluence outlet of a confluence device, and finally introducing the gas-liquid mixture into a gas-liquid separator for gas-liquid separation to obtain a target product. The method is simple to operate, safe and efficient, an amplification effect does not exist, and the prepared chloroethylene carbonate product is stable in quality, relatively high in yield and easy for industrial large-scale continuous production.

The invention belongs to the technical field of polyolefin, olefin products and olefin cascade polymerization reaction, and particularly relates to a cascade polymerization preparation method of branched polyethylene without inert media, the branched polyethylene and application. The invention provides a preparation method of cascade polymerization branched polyethylene without existence of an inert medium, which comprises the following steps: under the catalysis of an oligomerization-copolymerization cascade catalytic system, ethylene is oligomerized to generate even-carbon olefin, and ethylene and even-carbon olefin are copolymerized to prepare branched polyethylene, the even-number carbon olefins comprise C4 or above even-number carbon olefins; the oligomerization-copolymerization cascade catalytic system comprises an oligomerization catalyst and a copolymerization catalyst. According to the method disclosed by the embodiment of the invention, an inert medium does not need to be used, the concentration of the comonomer even-carbon olefin is high, the improvement of the insertion rate of the even-carbon olefin is facilitated, a part of oligomerization products can be simultaneously produced in the process of preparing the branched polyethylene, and the operation efficiency of a device is improved.

The embodiment of the invention relates to the technical field of corrosion resistance of test materials, in particular to a supercritical CO2 corrosion test system and a test method thereof. The supercritical CO2 corrosion test system comprises a sample loading device, a pressure regulating valve and an auxiliary pressure regulating part. The sample loading device is provided with a sample chamber for arranging a sample, and the sample chamber is also used for receiving the supercritical CO2 fluid, so that the sample in the sample chamber is subjected to a corrosion test under the supercritical CO2 atmosphere. The pressure regulating valve is arranged at the downstream of the sample chamber along the flowing direction of the supercritical CO2 fluid and is used for regulating the pressure of the sample chamber, so that a sample in the sample chamber is tested under a first preset pressure. The auxiliary pressure adjusting piece is used for increasing the pressure at the outlet of the pressure adjusting valve. By arranging the auxiliary pressure regulating part, the pressure difference between the inlet and the outlet of the pressure regulating valve is reduced, and the pressure of the sample chamber can be accurately regulated by the pressure regulating valve.

The invention relates to the technical field of silicon carbide single crystal growth, in particular to n-type 4H silicon carbide single crystal growth equipment and a growth method thereof.The growth equipment comprises an equipment frame platform, an operation platform, a power system, a control system, an elevator assembly and a vacuum cavity assembly; the operating platform, the power system and the control system are all arranged on one side of the equipment frame platform, the vacuum cavity assembly is arranged on the equipment frame platform, the elevator assembly corresponding to the vacuum cavity assembly is arranged on the equipment frame platform, and the power system and the control system are both electrically connected with the vacuum cavity assembly. The vacuum furnace further comprises a gas circuit panel assembly, a circulating cooling water supply system, a vacuum detection device and a temperature field lifting and rotating assembly. The vacuum cavity assembly comprises a vacuum chamber, a vacuum furnace cover, a low vacuum pumping device, a high vacuum pumping device, an infrared thermometer and a deflation valve. The wafer size of the silicon carbide single crystal material can be continuously increased, and the defect density is reduced.

The utility model provides a hydraulic tailstock buffer mechanism which comprises a tailstock, a centre assembly, a buffer spring, a rear end cover and a draw-in bolt, a centre sleeve is arranged on the upper portion of the tailstock, the centre assembly comprises a centre, an outer sleeve, an inner sleeve, a first bearing and a second bearing, the outer sleeve is inserted in the centre sleeve and can axially move in the centre sleeve, and the buffer spring is arranged in the centre sleeve. The inner sleeve is rotatably supported in the outer sleeve through the first bearing and the second bearing, and the rear end of the tip is inserted in the inner sleeve; a rear end cover is arranged at the rear end of the center sleeve in a sealing mode, and the multiple buffer springs are elastically supported between the rear end of the center assembly and the rear end cover. The tension bolt penetrates through the rear end cover from back to front, is connected with the center assembly and can synchronously and axially move along with the center assembly. According to the hydraulic tailstock buffering mechanism, when a workpiece is clamped, clamping force can be buffered, and the requirements of different clamping forces can be met by adjusting the buffering spring; and the requirement of workpiece rotation can be met.

The utility model relates to the technical field of ceramic material testing, in particular to a novel mechanical property testing device for ceramic materials, which comprises a fixing frame, a hydraulic cylinder and a base, the base is arranged at the lower end of the fixing frame, the upper end of the base is fixedly connected with a test board through a support column, and a pressure sensor is arranged in the test board. The upper end of the pressure sensor is connected with a plurality of telescopic detection rods. Through the device, the pressure sensor in the test board can accurately measure the pressure change generated when the ceramic material is stressed, the telescopic detection rods are used for detecting the deformation condition of the material, and the plurality of telescopic detection rods enable the device to simultaneously monitor a plurality of point locations of mechanical properties, so that the test accuracy and efficiency are improved. Through arrangement of a first laser distance measuring sensor and a second laser distance measuring sensor, the device can monitor the bending deformation state of the ceramic wafer in real time after the hydraulic plate is pressed down, so that the pressure applied to the material is accurately controlled, and the accuracy of evaluating the mechanical property of the material is improved.

The invention discloses a high-temperature alloy part surface polishing system, and relates to the technical field of part polishing. A plurality of grinding sand backflow channels which are arranged in a circular array mode are arranged between the grinding sand storage barrel and the backflow collection chamber, and automatic circulation flowing of grinding sand is achieved. Therefore, waste of the polishing sand is avoided, and the utilization rate of the polishing sand is increased. By means of the sand discharging opening and the rotating effect of the grinding sand driving impeller, grinding sand can continuously circulate between the storage barrel and the backflow collecting chamber, the continuous grinding effect of the grinding sand on parts is effectively guaranteed, and therefore the grinding efficiency and the grinding quality are improved. Through coordinated work of the driving motor, the planetary gear supporting disc, the planetary gearbox, the multiple pressurizing pipes and other assemblies, precise control over the internal pressure of the pressurizing pipes is achieved. The rotating speed and the internal pressure of the pressurizing pipe can be adjusted according to different outline structures and materials of parts, and it is ensured that the extrusion force of the telescopic rod on the parts is appropriate.

The invention relates to the technical field of plastic production, in particular to a control method of a PVC (polyvinyl chloride) full-automatic mixing line centralized feeding system, which comprises the following steps: acquiring each sub-domain and a melt plasticizing value of each sub-domain at each acquisition moment; the ideal melt plasticizing value of each sub-domain and the simulated melt plasticizing value of each sub-domain at the next acquisition moment are obtained respectively; obtaining the fitness of each parameter vector; in the process of obtaining the optimal parameter vector at the current collection moment, the convergence factor during each iteration passes through the convergence factor during the adjacent iteration and the closeness degree of the fitness of all parameter vectors during the adjacent iteration, and the difference of the parameter vectors between each iteration and the adjacent iteration is combined to obtain the optimal parameter vector at the current collection moment. Comparing the simulated temperature at the next acquisition moment with the preset ideal temperature for updating; and controlling the pressure of the die head of the extruder based on the obtained optimal parameter vector. The invention aims to improve the control precision of the pressure of the extruder die head.

The invention belongs to the technical field of blast furnace ironmaking in the ferrous metallurgy industry, and relates to a pulverized coal bunker pressure control method and device of a blast furnace coal injection system. By establishing an injection tank pressure relief control model and a pulverized coal bunker pressure control model, the pulverized coal bunker pressure is adjusted through the two models in the injection tank pressure relief execution period; the pressure of the pulverized coal bunker is accurately controlled to be in a micro-negative pressure state. The system has the advantages that the pressure of the pulverized coal bunker is accurately controlled, stable production of the system can be guaranteed, independent production of the coal pulverizing system and the injection system can be achieved, meanwhile, the automatic control level of the system is greatly improved, the workload of operators is reduced, and remarkable technical and economic benefits are achieved.

The invention belongs to the technical field of oil and gas exploitation, and specifically provides an experimental device suitable for metal pipe column material corrosion, comprising N 2 Gas source, fluid replenishment unit, CO 2 Gas circuit unit, mixing device, high temperature and high pressure corrosion experimental device unit and supercritical fluid chromatography analysis unit, outlet of liquid replenishment unit and CO 2 The outlet of the gas circuit unit is connected to the inlet of the mixing device, and the outlet of the mixing device is connected to N 2 The outlet of the gas source is connected to the inlet of the high temperature and high pressure corrosion experimental device unit, and the supercritical fluid chromatography analysis unit is connected to the high temperature and high pressure corrosion experimental device unit, which solves the problem of studying supercritical CO in the prior art. 2 When the fluid affects the corrosion of the metal pipe string, the phase change problem is not involved, and the corrosion problem of the pipe string in the actual production conditions cannot be truly and accurately evaluated. The present invention can more truly and accurately evaluate the safety performance of the pipe string in the actual production conditions, and can also be used for in-depth research on the corrosion mechanism and the evaluation of supporting anti-corrosion measures.

The invention discloses similar test block forming equipment for a roadway similar simulation experiment and a manufacturing method. The similar test block forming equipment comprises a lower forming die, and an upper pressurizing die for pressurizing and forming a similar material in the lower die at a constant pressure is arranged above the lower forming die; and the pressurizing upper die is connected with a pressurizing control device for setting a critical pressure value during pressurizing according to mechanical parameters of the standard test block and setting a critical position to control the pressurizing upper die to move and pressurize. According to the forming equipment, similar materials are pressed and formed into required similar test blocks through the pressurizing upper die capable of providing constant pressure, so that the large mechanical property difference of the similar test blocks caused by inconsistent manual tamping mode and tamping force in the similar test block manufacturing process is avoided; therefore, the reliability and the accuracy of the experimental result of the similar simulation experiment are improved.

The invention discloses an electrolytic manganese crushed manganese recycling process and a system thereof, and aims to recycle crushed manganese in an efficient and environment-friendly manner. The process comprises the following steps: mixing crushed manganese, scrap iron and a desulfurizing agent, adding into a direct-current electric arc furnace, smelting by utilizing direct current, and realizing desulfurization and uniform components by controlling electrode voltage and current intensity. In the smelting process, sampling analysis is conducted regularly, smelting parameters are adjusted according to results, and product quality is ensured. And after smelting is finished, cooling is conducted by controlling the flow speed and temperature of cooling water, and cracks or other defects are avoided. The system comprises a mixing device, a direct-current electric arc furnace, a tapping device and a cooling system, the direct-current electric arc furnace is a four-electrode cycle automatic reversing direct-current electric arc furnace and is provided with a water cooling system and an electrode sealing guide device, and the stability and safety of the smelting process are ensured. In addition, the system further comprises a collecting tank used for recycling dust, and environmental pollution is effectively reduced.