2947 results about "Pressure balance" patented technology

The invention relates to the technical field of intelligent control, provides a flow regulating valve servo force control method and system based on a force sensor, and aims to solve the technical problems of response delay, weak overshoot suppression capability and poor long-term operation stability. The method comprises the following steps: acquiring a servo driving current data set and a valve displacement track data set of a target regulating valve; performing pressure feature mapping processing on the servo driving current data set to generate a pressure fluctuation feature set corresponding to the driving current waveform data; the pressure fluctuation characteristic set and the valve displacement track data set are input into a preset force control decision model for dynamic matching processing, and a servo control instruction set is generated; executing multi-stage dynamic adjustment operation on a servo driving unit of the target adjusting valve according to the servo control instruction set, and generating real-time pressure balance state data; and iteratively updating the dynamic matching processing parameters of the force control decision model based on the deviation value of the real-time pressure balance state data and the preset pressure reference value.

The invention discloses a deep sea underwater electro-hydraulic actuator (EHA) and a control system thereof. The system provides power through the power source module, balance of system oil pressure and pressure of external seawater is controlled through the pressure compensation module, oil circulation and oil pressure control are conducted through the integrated valve set module, a control instruction of the control module is executed through the execution mechanism module, and the control module conducts cooperative control over the whole system. According to the control system, the unbalanced pressure between the system and the deep sea high-water-pressure environment is compensated through the pressure compensator so as to reduce the influence of the deep sea high-water-pressure environment, meanwhile, the pressure compensator serves as an oil tank to supply oil, miniaturization of the system is achieved, and the reliability of the system during underwater work is improved; according to the deep-sea underwater electro-hydraulic actuator, the mounting positions and internal flow channels of all elements of the integrated valve bank are optimized, the pressure loss of fluid in the flow channels is reduced, and the energy utilization efficiency of the deep-sea underwater electro-hydraulic actuator is improved; the asymmetric hydraulic cylinder can operate in four working conditions of deep sea, and underwater high-precision movement can be completed.

The invention provides a data center energy efficiency optimization method and system. A data acquisition node is arranged at the inlet end of a cooling unit to obtain refrigerant transportation data, the data are input into a path optimization model constructed based on a physical topological structure of the cooling unit, and a dynamic adjustment coefficient set containing heat exchange efficiency, phase change delay and pressure compensation parameters is generated. Meanwhile, the temperature difference generating capacity is converted into a driving parameter set based on the heat source distribution map by obtaining the surface waste heat of the cooling unit. And in combination with the dynamic adjustment coefficient set and the driving parameter set, the temperature gradient compensation amount, the phase change trigger threshold value and the pressure balance interval are determined, joint optimization is carried out, and a refrigerant flow rate control scheme adapting to machine room environment temperature fluctuation is generated. And energy efficiency optimization of the data center machine room environment is realized based on the refrigerant circulation parameters. According to the technical scheme provided by the invention, the energy efficiency optimization effect of the data center is remarkably improved by optimizing the flow speed control of the refrigerant.

The invention discloses an intelligent cooperative switching control system and method for multi-path valve runners, and the method comprises the steps: collecting all-condition operation data of a multi-path valve system, extracting valve switching characteristic parameters, and building a runner mapping relation between paths; a cascade action chain containing time sequence dependence is constructed based on the mapping relation and the switching characteristics, and the action sequence and the trigger condition of each drift diameter are determined; by analyzing the pressure distribution and the flow velocity change in the cascade action chain, predicting the water hammer strength and designing a reverse pressure wave parameter, and generating a water hammer counteracting control instruction; high-low pressure area distribution in the flow field is identified, a flow field complementary cooperation scheme is constructed, and a pressure balance control strategy is generated; analyzing a pressure wave propagation path to determine a superposition elimination point, extracting pressure pulse resonance characteristics and generating time sequence control parameters; and the sequential control parameters are matched with the cascade action chain, synchronous control nodes are determined through delay compensation, and a time-sharing control sequence is generated to achieve intelligent cooperative switching of the multi-drift-diameter valve flow channels.

The invention discloses a pneumatic-biological signal feedback cooperative control method based on an anti-gravity rehabilitation treadmill, and the method comprises the steps: synchronously collecting sEMG, IMU and plantar pressure signals, and completing the time-space registration through clock synchronization, time warping and extended Kalman filtering; muscle activation degree, pressure center offset and joint angular velocity are extracted to construct multidimensional features, and gait phase switching is predicted through LSTM-CNN; the TS fuzzy system generates a preliminary control instruction according to expert rules, and Q-learning takes pressure balance and motion smoothing as reward functions to optimize the weight reduction proportion and the treadmill speed online; a waist annular air cavity is driven to be inflated to form a pressure supporting field so as to lift a pelvis and guide a lower limb gait mechanical mode, so that the muscle activation degree, the joint angular motion trail and the pressure center migration characteristic are dynamically influenced, a servo motor tracks phase nodes in a feedforward-feedback mode, and risk early warning and training parameter self-adaptive closed-loop rehabilitation are achieved.

The seabed imaging sonar comprises a receiving transduction module, the receiving transduction module comprises a receiving plate, an annular sealing block, a socket and a front cover, a first mounting opening is formed in the middle of the front cover, the annular sealing block is arranged at the edge of the first mounting opening, and the receiving plate is arranged at the first mounting opening; the annular sealing block is at least partially attached to the inner side face and the side edge of the receiving plate. The socket is arranged on the inner side face of the receiving plate and located in the middle of the annular sealing block. The shell is internally provided with a pressure balance cavity, the pressure balance cavity is filled with a compressible fluid medium, the side wall of the shell is provided with a second installation opening, the front cover is installed at the second installation opening, and the socket is located in the pressure balance cavity; and the piston assembly comprises a piston cylinder and a piston, the piston is movably arranged in the piston cylinder, and one end of the piston cylinder communicates with the pressure balance cavity so as to allow the compressible fluid medium to enter the piston cylinder.

The invention relates to the technical field of lithium ion battery safety, and discloses a lithium ion battery thermal runaway multi-cascade emergency response prevention system. The system comprises a thermal signal monitoring module, a thermal diffusion prediction module, an emergency suppression module, a pressure balance module and a multi-mode linkage module. The thermal signal monitoring module obtains multi-dimensional temperature data, identifies abnormity and generates a thermal runaway early warning signal; the thermal diffusion prediction module combines the early warning signal and the battery module structure parameters to calculate the thermal propagation path and rate and generate a prediction result; the emergency suppression module matches a suppression medium according to a prediction result, and calculates a dose putting strategy to form a suppression scheme; the pressure balance module obtains pressure data, analyzes the change rate and distribution, adjusts a pressure release valve strategy in combination with a suppression scheme, and generates a pressure regulation and control instruction; and the multi-mode linkage module integrates data and a scheme, and generates a system-level emergency response instruction based on a pressure regulation and control instruction to realize thermal runaway multi-level joint prevention.

The invention relates to the technical field of pipeline detection, in particular to a buried oil and gas pipeline excavation defect detection device which comprises a fixed part, the fixed part comprises two fixed supporting rings, and movable detection parts are arranged on the two sides of the fixed supporting rings; the moving detection part comprises a plurality of moving rings, the moving rings are internally provided with grooves and fixedly connected with annular air bags, clamping assemblies slidably connected with the side walls of the moving rings are arranged below the annular air bags, moving wheels are arranged at the bottoms of the clamping assemblies, and pneumatic assemblies used for pneumatically propelling the moving rings to move are further arranged in the moving rings; the sides, close to the fixed supporting ring, of the movable rings are fixedly connected with detection assemblies, and the sides, away from the fixed supporting ring, of the movable rings are fixedly connected with cleaning assemblies. By designing the control system with the air pressure balance module, the buckling threshold value adjusting module and the ultrasonic detection module, flexible adaptation and high-precision detection of pipelines with different pipe diameters are achieved, and the detection efficiency and accuracy are improved.

The invention relates to the technical field of intelligent agriculture and precise irrigation, in particular to an intelligent control system for agricultural irrigation. Comprising a water-saving valve module, a sensing layer module, a control layer module, an execution layer module and a data and application layer module, and the water-saving valve module is used for achieving microsecond level flow regulation and control through piezoelectric ceramic driving and energy recovery and integrating a self-maintenance function. According to the invention, the LSTM network and the Duelling DQN algorithm are utilized to accurately discriminate the soil type and formulate an extreme weather coping scheme, dynamic optimization of an irrigation strategy is realized based on low-power-consumption edge calculation and an intelligent control algorithm, the adaptability and decision accuracy of the system are greatly improved, multiple advanced technologies are integrated, and the system is suitable for large-scale popularization and application. Comprising a magneto-rheological buffer, a TSN valve controller, an SMA emergency pressure release valve and a variable frequency water pump driver, pressure balance of a pipe network, high-precision synchronization of valves and safe treatment of sudden failures are ensured, and the stability and flexibility of an irrigation system are comprehensively improved.

Active suspension actuator systems including an actuator with a compression volume and an extension volume are described. In some embodiments, the system includes one or more flow control devices in fluid communication with the compression volume and / or the extension volume of the actuator. In some instances, a flow control device may include a pressure balanced blow-off valve (PBOV). In some embodiments, the system includes a high capacity bidirectional base valve. In some embodiments, two or more flow control devices cooperate to, for example, damp low amplitude oscillations in the extension and / or compression volumes, and to allow the build-up of pump generated differential pressures while discharging rapid road induced differential pressure spikes between the extension and compression volumes.

The invention provides an air tightness detection device of a pressure balance type plug valve, and relates to the technical field of valve air tightness detection. An air tightness detection device of a pressure balance type plug valve comprises a water pool, an adjusting mechanism, two clamping mechanisms and an end sealing mechanism, the end sealing mechanism comprises two groups of positioning assemblies and two groups of sealing assemblies, and the positioning assemblies and the sealing assemblies are communicated and used for enabling the sealing assemblies to generate axial displacement. The sealing assembly is coaxially arranged in multiple layers, the structures of all the layers of the sealing assembly are the same, the sealing assembly is used for being inserted into an inlet and an outlet of a plug valve to be detected, and by means of the multi-layer design of the sealing assembly and the design that the positioning assembly enables each layer of the sealing assembly to generate independent axial displacement, the plug valve to be detected can be detected. The sealing assembly is adapted to plug valves to be detected with different calibers; the sealing assembly has the action of expansion under the action of air source pressure, so that the part inserted into the plug valve to be detected is in sealed connection with the plug valve, and the sealing performance is ensured.

The invention discloses an oil gas dust removal and purification system capable of intelligently sensing and adjusting air volume and pressure balance. The oil gas dust removal and purification system comprises an intelligent monitoring and control module based on a system architecture, an air volume optimization and dust removal processing module and a pressure management and safe discharge module, and the intelligent monitoring and control module comprises an environmental data acquisition module and an intelligent decision and execution module; the air volume optimization and dust removal treatment module comprises an air volume intelligent adjusting module and an efficient dust removal and filtering module. Compared with the prior art, the system has the advantages that the air volume and the pressure are intelligently adjusted; efficient dust removal and purification are realized; and the safety performance is improved.

The invention relates to a hydrogen environment slow tensile testing machine and a control method thereof, and relates to the technical field of material performance testing. A lifting cross beam, a pressure balancing device and a clamp of the hydrogen environment slow tensile testing machine are sequentially arranged from top to bottom, a sample is installed on the clamp, the sample and the clamp are arranged in a test kettle together, an air inlet and an air outlet are formed in the test kettle, the test kettle is filled with hydrogen through the air inlet and the air outlet, and therefore the sample is subjected to a tensile test in the hydrogen environment. According to the hydrogen environment slow tensile testing machine and the control method thereof, the accuracy of a tensile test of a material in a hydrogen environment can be improved, the operation is simple, and the structural safety is high.

The invention discloses a coating assembly suitable for a straight pipe pressure balance type expansion joint, and belongs to the technical field of expansion joints. The coating assemblies comprise the two working corrugated pipe coating assemblies and the balance corrugated pipe coating assembly, the working corrugated pipe coating assemblies are arranged on the outer ring of the first working corrugated pipe and the outer ring of the second working corrugated pipe, and the balance corrugated pipe coating assembly is arranged on the outer ring of the balance corrugated pipe. The coating assembly provided by the invention is composed of a plurality of groups of equally-divided circumferences, each group of equally-divided circumferences can be spliced and fixed to form a circumference shape, the coating assembly can be directly arranged on outer rings of a working corrugated pipe and a balance corrugated pipe in an existing structure, and on-site coating and repairing of the expansion joint are carried out in a mode that equipment is not stopped; economic losses caused by shutdown can be effectively reduced, the small wrapping corrugated pipe and the large wrapping corrugated pipe with the waveform parameters meeting the pressure balance requirement can be selected at the same time, and it is guaranteed that the wrapped expansion joint can meet the original performance requirement.

The invention provides an auxiliary welding device for building steel pipes, and relates to the technical field of building construction. Clamping seats are arranged at the two ends of the welding base respectively, one clamping seat is fixedly connected with the welding base, the lower end of the other clamping seat is in sliding tangency with the top of the welding base, two directional guide rods are perpendicularly arranged on the sliding clamping seat towards the fixed clamping seat, and the tail ends of the directional guide rods penetrate through the fixed clamping seat. The fixed clamping base and the sliding clamping base which are arranged at the two ends of the welding base are combined with the elastic reset mechanism (the directional guide rod, the alignment spring and the plug), and flexible compensation and pressure balance of steel pipe butt joint are achieved.

The invention relates to the technical field of hydrogen production, in particular to an electrolyte flow accurate regulation and control system and method based on a variable-frequency circulating pump. Comprising a frequency conversion circulating pump set with a dual-redundancy structure, and a main pump and a standby pump of the frequency conversion circulating pump set adopt coaxial linkage design and form a bidirectional pressure balance loop with an electrolyte circulating pipeline; the multi-parameter fusion detection module is integrated with a high-frequency sampling flowmeter, an anion concentration sensor with a temperature compensation function and a three-channel pressure transmitter, and signals of all the sensors are subjected to time synchronization processing to generate a joint detection data packet; the dynamic compensation controller is internally provided with an anion migration characteristic database and an electrolyte rheology model, and generates a control instruction with an advanced compensation function according to the real-time anion concentration variable quantity; the multi-physical-field parameter change of the electrolyte can be sensed in real time, the control instruction is dynamically corrected, and the anti-interference capability is high.

The invention provides a gate valve pressure balance control method and device, electronic equipment and a storage medium, and relates to the technical field of gate valve pressure control. The method comprises the steps of monitoring a gate valve control signal and a pressure difference between two sides of a gate valve; calculating a gate valve control signal change rate according to the gate valve control signal, and setting a control signal amplitude threshold value and a change rate threshold value; according to the gate valve control signal change rate, the control signal amplitude threshold value and the change rate threshold value, the gate valve switching action is predicted; based on the predicted gate valve switching action, according to the pressure difference of the two sides of the gate valve, the number of balance channels needing to be opened when the pressure balance is achieved on the two sides of the gate valve is judged; the controller is controlled in advance to open the corresponding number of balance channels to balance the pressure on the two sides of the gate valve. According to the gate valve pressure balance control method, the problem that in the prior art, the response speed is insufficient in the aspect of gate valve pressure balance control is solved, and the effects of remarkably improving the pressure balance response speed and effectively restraining hydraulic impact and vibration are achieved.

The invention provides a blood pressure measurement system and method based on multi-airbag cooperative control and oscillatory wave analysis, and relates to the technical field of medical instruments. Comprising an integrated cuff cover body, an inflator pump, an electromagnetic valve, a pressure balancing device and a microprocessor, a first air bag, a second air bag and a third air bag are arranged in the integrated cuff cover body, firstly, an inflation pump is started, the multiple air bags are synchronously inflated to preset initial pressure, then a first air bag electromagnetic valve and a third air bag electromagnetic valve are closed, a pressure balance device dynamically adjusts a miniature deflation valve, and the pressure in the first air bag and the pressure in the third air bag are kept constant; the inflator pump continues to inflate until the pressure in the second airbag is higher than the systolic pressure level; the measuring method specifically comprises a multi-air-bag pressure measuring mode and a double-air-bag pressure measuring mode. The multi-air-bag pressure measuring mode is that three air bags are used for measuring pressure at the same time, and the double-air-bag pressure measuring mode is that only the second air bag and the third air bag are pressurized, so that blood pressure measurement is achieved.

Provided are a control method for an electronic expansion valve (300), a heat pump system, and a storage medium. The method comprises: upon receipt of a shutdown instruction of a heat pump system, measuring a pressure value related to operation of an electronic expansion valve (300) in the heat pump system; and controlling the opening degree of the electronic expansion valve (300) on the basis of the pressure value, so that the heat pump system reaches a pressure balance state.

The invention discloses a reinforcing method for long-term automatic grouting repair of fractured rock mass.The reinforcing method comprises the steps that a pressure sensor is arranged at the tail end of a grouting opening, and data of the pressure sensor are obtained through an intelligent control system; when the intelligent control system monitors that pressure difference is generated due to pressure unbalance caused by surrounding rock fracture development, the intelligent control system sets grouting parameters and starts a grouting program; in the grouting process, pressure balance between equipment and surrounding rock is maintained through a pressure adjusting module, and it is ensured that grout is stably conveyed within the set pressure range all the time in the conveying process after a grouting program is started; grouting pressure and flow are controlled in the grouting process; in the grouting process, the bacterial liquid and the cementing liquid are input in a separated conveying and on-site gathering mode; and accumulated liquid in the pipeline is rapidly removed after grouting is finished. By adopting the method, cracks can be continuously monitored and periodically repaired, and the manual intervention requirement is reduced. The modular design is convenient for maintenance and replacement of equipment, and the maintenance cost is reduced.

The invention provides a liquid cooling CDU system with an intelligent pressure balance tank, and relates to the technical field of electronic equipment heat dissipation, and the system comprises a main circulation loop, the intelligent pressure balance tank, a liquid supplementing loop, a control system and a monitoring module. The intelligent pressure balance tank is provided with a liquid level sensor set, an exhaust valve installed on the non-top portion and a mechanical pressure release valve. The installation height of the exhaust valve is preset so that a buffer air layer can be reserved. The control system responds to signals of the liquid level sensor and controls opening and closing of the liquid supplementing loop and the exhaust valve. Through the design of a buffer air layer and a non-top valve group of the intelligent pressure balance tank, automatic liquid supplementing and graded pressure protection logic are combined, the problems of manual liquid supplementing lag, large pressure fluctuation, high safety risk and the like of a traditional liquid cooling CDU system are solved, and the liquid cooling CDU system is suitable for efficient heat dissipation of a data center and high-power electronic equipment.

The invention discloses an in-kettle environment pressure stabilizing structure applied to an anhydrous hydrogen fluoride arsenic removal process, relates to the technical field of arsenic removal processes, and provides an improvement process about a rubber isolation pad and a lower supporting table on the basis of an oxidation reaction process in the anhydrous hydrogen fluoride arsenic removal process and on the basis of not changing the reaction process. The basic content is as follows: the reaction volume in the reaction cavity is changed by utilizing the elastic deformation of the rubber isolation pad and the supporting effect of the lower supporting table, so that the effect of preliminarily adjusting the environmental pressure in the reaction cavity is achieved; a combined or independent regulation and control process is carried out mainly aiming at a low-pressure state and an overpressure state, a pressure difference and pressure balance transfer principle is further utilized, and the environment pressure stabilizing effect in a container is achieved through the simplest and effective structure.

The invention relates to the technical field of intelligent control of heavy equipment, in particular to a hydraulic synchronous intelligent control system for segmented turnover of an overweight steel structure, and discloses the hydraulic synchronous intelligent control system for segmented turnover of the overweight steel structure. According to the system, full-field strain data of a structure surface is acquired by deploying a flexible grid sensor array, and a deformation gradient topological graph is constructed to identify an instability risk area. And a dynamic fluid network model of the hydraulic system is established, fluid-solid coupling simulation is carried out in combination with deformation characteristics, and pressure pulsation transmission paths under different control instructions are predicted. And the system dynamically optimizes a data sampling strategy and network model parameters according to a prediction path, generates a hydraulic cylinder coordination action instruction subjected to pressure balance verification, and finally drives an execution mechanism to complete turnover operation. According to the scheme, full-field real-time sensing of structural deformation and dynamic coupling prediction control of hydraulic fluid are achieved, and the safety and control precision of the overweight component in the turnover process are improved.

The invention relates to the technical field of medical instruments, and discloses an anesthetic waste gas purification device which comprises a confluence shell and a water collection tank, a support is arranged on the inner side of the water collection tank, and a water collection cavity is formed between the support and the water collection tank; the bottom of the confluence shell is connected with an air outlet pipe through a guide part; an activated carbon filter plate capable of floating up and down in the axial direction is mounted on the inner side of the guide part; a condensation cover is installed on the top of the confluence shell and comprises a top cover, an air inlet pipe is installed on the top cover, a bottom plate is connected to the lower portion of the top cover, and a refrigeration module is installed below the bottom plate. Waste anesthetic gas penetrates through the purification device from top to bottom to be purified, condensate formed in the condensation cover converges to the water collection tank under the action of gravity and airflow blowing, and collection is convenient; the activated carbon filter plate can float in the axial direction, pressure balance can be achieved through automatic downward movement when the up-down pressure difference is large, and the risk that the pore structure of the activated carbon filter plate is damaged is reduced.

The invention relates to an atmosphere environment test chamber. The atmosphere environment test chamber comprises a chamber body, a pull rod, a clamp and a pressure balance assembly; the cabin body comprises a main body and a main box cover, the main box cover is connected with the main body to define a test cavity, the test cavity is used for being full of a gas medium, and the main box cover is provided with an operation hole communicated with the test cavity; one end of the pull rod is connected to the stretching piece, the other end of the pull rod penetrates through the operation hole and extends into the test cavity, and the pull rod is driven by the stretching piece to move along the extension direction of the operation hole relative to the cabin body; the clamp is contained in the test cavity and comprises a first connecting piece and a second connecting piece, the first connecting piece is connected to the main body, the second connecting piece is connected to the pull rod, and the first connecting piece and the second connecting piece are used for connecting two ends of a sample; the pressure balance assembly is connected to the pull rod and is used for applying acting force to the pull rod, so that the acting force applied to the pull rod by the stretching piece in the extension direction of the operation hole is the same as the acting force applied to the sample by the pull rod.

The invention discloses a polyurethane foaming material with a gradient density skin-core structure and a preparation method thereof, and the preparation method comprises the following steps: step 1, injecting a mixed polyurethane foaming raw material into a preheated foaming mold, and closing the mold; step 2, synchronously starting a mold rapid cooling system and an air pressure balance system for foaming and curing when the reaction raw materials are injected; and step 3, taking out the product after curing, standing at room temperature, and curing to obtain the polyurethane foam material. The surface temperature of the mold is suddenly reduced through quenching temperature control so as to form a compact skin layer, and an in-mold pressure curve is controlled by using an air pressure balance program so as to accurately regulate and control foaming of a core layer. The prepared material has a continuous gradient density structure, the skin layer density is high, the core layer density is low, a transition interface with strong binding force is arranged between the skin layer and the core layer, and the extreme performance combination of'hard outside and soft inside 'is successfully realized.

The invention discloses a cover body structure and a drinking water container with the cover body structure, the cover body structure comprises a cup cover and a straw structure, the cup cover can seal a cup body, and the cup cover comprises a cover body and a handle; a mounting channel penetrating through the upper portion and the lower portion of the cover body is arranged on the cover body, the straw structure penetrates through the cover body through the mounting channel, a pressure relief device is arranged in the cup cover and comprises an air guide channel, an air valve structure and a switch structure, the air guide channel is communicated with the bottom of the cover body and the interior of the cover body or the top of the cover body, and the switch structure comprises an acting part and an operating part. During use, the pressing surface is operated to drive the acting part to drive the air valve structure to conduct the air guide channel, so that the cavity is communicated with the interior of the cup cover or the upper portion of the cup cover, air pressure balance is formed, and a user can complete suction and drinking through one-hand operation, drink after pressing and seal after loosening the hand.

Systems and methods for releasing one or more non-gaseous remediating components into a packaged beverage upon opening of the packaged beverage are provided herein. For example, a cartridge includes a cap that is releasably secured to a top end of a cylindrical body. The cylindrical body may include an inner chamber and an outer chamber. The outer chamber may fill with dissolved gas when the outer chamber reaches a pressure equilibrium with the packaged beverage. The cap may include a pinhole orifice configured to restrict fluid flow between the outer chamber and an environment external to the cartridge such that when the packaged beverage is opened, the pinhole orifice restricts the gas within the outer chamber from flowing to the external environment, thereby causing the cap to decouple from the top end of the cylindrical body and release the remediating components housed in the inner chamber into the packaged beverage.

The invention discloses a double-push-plate type nitrogen protection resistance furnace and an atmosphere circulation purification control assembly, relates to the technical field of resistance furnaces, and aims at solving the problems that when cavities of the double-push-plate type nitrogen protection resistance furnace are communicated, temperatures interfere with one another, and the temperature of a furnace chamber is influenced by supplementing a protective atmosphere. The furnace body assembly is formed by connecting a plurality of independent cavities in series, the adjacent cavities are provided with openable isolation doors, and each cavity is provided with a nitrogen inlet / outlet, a temperature and pressure sensor and a heating assembly; the inert gas circulation structure achieves circulation supply and purification of protective gas, the gas supply amount of a single cavity can be adjusted, the atmosphere temperature and pressure cooperative control system integrates a parameter collection module, a temperature and pressure reference setting module, a temperature recovery compensation module, a pressure balance adjustment module and a closed-loop control module, and a gas purity monitoring module is additionally arranged. And a temperature and pressure cooperative control closed loop is formed through secondary feedback control, so that accurate regulation and control of the temperature and pressure of each cavity, recycling and reusing of waste heat of protective gas and dynamic maintenance of purity are realized.

The invention discloses a secondary water supply tail end pressure balance edge computing AI intelligent gateway, and relates to the technical field of secondary water supply. The secondary water supply tail end pressure balance edge calculation AI intelligent gateway comprises a data acquisition and transmission module, an edge calculation and intelligent analysis module and a control instruction generation and execution module, and the secondary water supply tail end pressure balance edge calculation AI intelligent gateway disclosed by the invention brings significant improvement in multiple aspects for a secondary water supply system; in the aspect of pressure balance performance, the terminal pressure can be accurately monitored and dynamically regulated in real time by means of advanced edge computing power and an intelligent algorithm, pressure change can be effectively predicted and measures can be taken in advance by continuously analyzing a large amount of pressure data and a water consumption trend, and the fluctuation range of the terminal pressure is strictly controlled within an extremely small range. And the pressure can be stabilized within + / -0.01 MPa of a set pressure value, so that users on all floors can enjoy stable and sufficient water pressure at any time, and inconvenience in water use caused by pressure fluctuation is eliminated.