1077 results about "Liquid pressure" patented technology

The invention relates to the technical field of energy storage management, in particular to a high-energy-density liquid cooling energy storage system based on thermal management optimization, which comprises a thermal response calculation module, a thermal risk area identification module, a cooling resource allocation module, a thermal decoupling state judgment module and a charging and discharging power limiting module. According to the method, the inlet temperature, the outlet temperature and the cooling liquid flow speed of the high-energy-density energy storage equipment are obtained, the unit thermal load conversion rate is calculated, the unit thermal response deviation degree is determined, the thermal risk area higher than the standard limit is clearly recognized in the energy storage equipment, the corresponding liquid cooling channel is accurately selected, and the cooling liquid pulse flow frequency is optimized; the pertinence and timeliness of the cooling liquid in actual use are effectively improved, the local overheating hidden danger is avoided, the lag response is marked in time by monitoring the cooling liquid pressure difference and the temperature rise change in real time, the decoupling state between the cooling liquid and the thermal load is judged, the charge and discharge power dynamic reduction measure is implemented, and the trend of abnormal and continuous accumulation of the local thermal load is restrained.

The invention discloses a high-precision concrete liquid penetration test integrated system and a use method. The system comprises a closed liquid containing box, a self-absorption turbine, a tank body, an upstream high-precision flow meter, a downstream high-precision flow meter, a data acquisition port set, a downstream data acquisition port set, a liquid pressure detector, a digital display differential pressure sensor, a concrete permeation device and a multi-channel recorder. The system can comprehensively collect the flow velocity, the surface pressure and the up-down pressure difference before and after the liquid flows through the concrete test piece, and synchronously display real-time data to computer software. Synchronous data acquisition ensures the accuracy of test data under different boundary conditions, and the system provided by the invention can accurately measure the permeability of concrete test pieces with different shapes and different fracture states under different pressures on the premise of not influencing the structural integrity of the test pieces.

The invention relates to the technical field of casting equipment, and discloses energy-saving furnace roller automatic cooling mold opening casting equipment which comprises an upper mold, a lower mold, an upper locking assembly, a lower locking assembly and a jacking assembly. After casting is completed, cooling liquid is continuously input into the water inlet, the outlet of the lower die cooling cavity is blocked by the sealing column, the cooling liquid is gradually accumulated in the closed lower die cooling cavity, the liquid pressure is gradually increased in a stable and controllable trend, and along with continuous increase of the pressure, the sealing plate is subjected to thrust from bottom to top, so that the sealing effect is improved. When the sealing column moves to the limiting plate, the sealing column is pushed to move upwards, in the process, the liquid pressure is not instantly exploded but is gradually increased, damage of impact force to the mold is effectively avoided, after the sealing column moves to the limiting plate, the rising pressure can push the upper mold to stably rise, and automatic mold opening is achieved. According to the mode that the liquid pressure gradually rises to complete mold opening, an additional power device is not needed, the maintenance difficulty is lowered, and meanwhile a large amount of energy consumption is saved.

The invention discloses a methanol direct injection injector, comprising: an injector body and a solenoid valve component, an orifice plate, a control valve seat and a needle valve component which are installed below the injector body through a tight cap of the injector body; wherein the solenoid valve component is located above the orifice plate, the orifice plate is located above the control valve seat, and the control valve seat is located above the needle valve component; a first and a second straight hole are arranged on the orifice plate, an inclined hole, a third straight hole and two small holes are arranged on the control valve seat, a needle valve component control chamber is arranged on the upper part of the needle valve component, the lower end of the first straight hole is communicated with the lower end of the second straight hole on the orifice plate and the upper ends of the inclined hole, the third straight hole and the two small holes on the control valve seat, and the lower ends of the inclined hole, the third straight hole and the two small holes on the control valve seat are communicated with the needle valve component control chamber; the opening and closing of the second straight hole on the orifice plate is controlled by turning on and off the power of the solenoid valve component, and then the methanol liquid pressure in the control chamber of the needle valve component is controlled to realize the start of the needle valve component injection.

The invention belongs to the technical field of oil drilling and discloses self-sealing sampling oil drilling equipment which comprises a rotary drilling rig, a drill bit is mounted at the lower end of a drill rod of the rotary drilling rig, a functional box and a sampling box are mounted on the outer side surface of the upper end of the drill bit in an embedded manner, and mounting holes are formed in the outer side surfaces of the functional box and the sampling box. The functional box and the sampling box are fixedly mounted through mounting holes and bolts, pressure sampling mechanisms are arranged on the surfaces of the functional box and the sampling box, and collection of samples at different depths is triggered by utilizing liquid pressure when liquid is drilled. According to the oil drilling equipment with the self-sealing type sampling function, collection of samples at different depths is automatically triggered by utilizing liquid pressure when liquid is drilled, a pressure triggering mechanism of triggering time is changed by changing spring rigidity, and the samples can be accurately obtained at different target depths; depth errors caused by manual operation or repeated start and stop of drilling equipment are effectively avoided.

Provided is an endoscopic surgery system with automatic hydraulic monitoring function, comprising a control system, a cart kit and an endoscope accessory. Then control system includes a processor, a touch display, a perfusion pump, a negative pressure pump, etc. The cart kit includes a cart, a perfusion tube and an extraction tube. The endoscope accessory includes a pressure measuring guide sheath, a hydraulic sensor and an electron microscope. When the endoscope is employed for observation, the invention can control the perfusion and monitoring of the liquid in endoscope instrument, as well as the cavity liquid pressure in organs, allowing for precise control of the intracavity pressure during operation. The real-time monitoring module measures the liquid pressure in the organ in real time and sends data to the control system, calculates a state of the intracavity pressure based on real-time data obtained from the hydraulic sensor using intelligent PID control.

The invention discloses a gas lift reverse circulation drilling starting pressure and circulation gas supply pressure calculation method. The method comprises the following steps that S1, hydrostatic pressure of the bottom of an inner pipe of a double-wall drill rod is calculated; s2, calculating the friction loss pressure of compressed air of an outer annulus of the double-wall drill rod; s3, calculating the friction loss pressure of the compressed air flowing through the earth surface gas transmission channel; s4, calculating the local pressure loss of the compressed air passing through the orifice in the gas-liquid mixer from the outer pipe of the double-wall drill rod; s5, calculating the liquid phase flow friction pressure loss of the inner pipe of the double-wall drill pipe; s6, calculating the liquid-phase flow friction pressure loss of the deslagging pipeline; s7, calculating the three-phase flow pressure drop of the inner pipe of the double-wall drill pipe; and S8, the starting pressure and the circulating air supply pressure are calculated. According to the method for calculating the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling, the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling can be accurately and conveniently calculated by accurately calculating the pressure of each part of the gas lift reverse circulation drilling process, and a theoretical basis is provided for stable and efficient operation of a circulating system.

The invention discloses a testing machine for testing the sealing performance of a sealing pair of a control valve, which comprises a closed box body, a rotary driving mechanism, a rotary lifting assembly, a lower sample replacement block, a telescopic cylinder, an upper sample replacement block, a liquid pressure supply system, a gas pressure supply system, a leakage detection system and a data acquisition and control system, and is characterized in that the rotary driving mechanism is mounted in the closed box body; the rotary lifting assembly is located in the closed box and is in transmission connection with the rotary driving mechanism. The lower sample replacement block is mounted at the top of the rotary lifting assembly; the telescopic cylinder is installed in the closed box body, and a telescopic rod of the telescopic cylinder is fixedly connected with the rotary lifting assembly. The upper sample replacement block is mounted at the top of the closed box body and corresponds to the lower sample replacement block in position; the liquid pressure supply system is connected and communicated with the sealed cavity of the upper sample replacement block; and the gas pressure supply system is aligned with a sealing interface formed between the upper sample replacement block and the lower sample replacement block. The method can improve the applicability, quantify the sealing leakage rate of the valve, and comprehensively evaluate the sealing performance of the control valve.

The invention relates to a BOG (Boil Off Gas) circulating treatment method for a marine ship and land liquid cargo film tank filling process, which comprises the following steps of: carrying out primary cooling on the top temperature in a second film tank, and then further cooling the second film tank; then the supercooled liquid goods are sprayed on a second film tank, the second film tank is communicated with the first film tank to achieve gas-liquid pressure balance, and then the filling process is conducted, specifically, the liquid goods in the first film tank are conveyed into the second film tank through a liquid goods pump and a liquid phase connecting hose. Compared with the prior art, the problem that storage of compressed low-temperature liquefied gas such as LNG is affected due to the fact that the temperature of a land liquid cargo thin film tank (or a ship thin film tank) is increased due to the fact that the land liquid cargo thin film tank (or the ship thin film tank) is exposed to the sun and BOG generated by liquid cargo such as LNG is increased can be effectively solved.

A sensing device includes a body having a first chamber, a second chamber, and a liquid path which are filled with a liquid, the liquid path communicates with the second chamber, a pressure difference detection chip installed in the first chamber, and a pressure detection chip installed in the first chamber. The pressure difference detection chip seals an opening of the liquid path disposed on a bottom surface of the first chamber. The pressure difference detection chip detects a liquid pressure difference between the first chamber and the second chamber. The pressure detection chip detects a liquid pressure in the first chamber.

The utility model belongs to the technical field of drive axle assembly, and particularly relates to horizontal C-shaped press-fitting equipment and a press-fitting system for a forklift drive axle. The press-fitting device comprises two press-fitting mechanisms symmetrically arranged on the two sides of a line body rail and a connecting rod used for fixedly connecting the two press-fitting mechanisms. The press-fitting mechanism comprises a rack, an L-shaped press-fitting support installed on the rack in a sliding mode through a horizontal moving sliding table, a gas-liquid pressure cylinder with the fixed end fixedly installed on the L-shaped press-fitting support and a pressure head assembly installed on the L-shaped press-fitting support in a sliding mode through a first sliding assembly. At the initial position, the distances between the corresponding L-shaped press-fitting supports on the two sides of the line body rail and the corresponding drive axle press-fitting positions to be press-fitted in the X-axis direction are different. The two press-fitting mechanisms symmetrically arranged on the machine frame are adopted to form a horizontal C-shaped structure, press-fitting force only acts on the axes, where half-shaft oil seals and oil seal check rings are installed, of the two ends of the drive axle, other parts are not stressed, the service life of press-fitting equipment is guaranteed, and high operation efficiency is achieved.

A liquid cartridge has an outer body composed of at least two wall components and which surrounds a pressure chamber for receiving pressurized gas and pressurized liquid. The liquid cartridge has an outlet opening which penetrates one of the wall components. The liquid cartridge has an outlet valve component held movably or fastened on an inner side of the pressure chamber on at least one wall component, and which, in a closed state, prevents liquid from leaving the pressure chamber through the outlet opening. The outlet valve component can be transferred to an open state by application of force from the outside. For separation of gas and liquid in the pressure chamber, the pressure chamber includes a displaceable or deformable partition wall, which divides the pressure chamber into a gas chamber and a liquid chamber.

A brake system for a vehicle include first brake devices respectively provided in two vehicle wheels of a vehicle and configured to perform a braking operation by transmitted liquid pressure, second brake devices respectively provided in the other two vehicle wheels of the vehicle and configured to perform a braking operation by an embedded second electromechanical actuator, a reservoir, a master cylinder including a master chamber, and a master piston provided in the master chamber, a hydraulic actuator configured to generate the liquid pressure by an electrical signal outputted in response to a displacement amount of the brake pedal, a hydraulic circuit configured to control the liquid pressure to be transmitted to the first brake device, and an electronic control unit configured to control the first electromechanical actuator, the hydraulic actuator, and the hydraulic circuit so that the first brake device and the second brake device generate braking forces.

The invention discloses an extracorporeal circulation system and a control method thereof, and relates to the technical field of medical instruments. The extracorporeal circulation system comprises a membrane oxygenator, a microembolus filter, a rolling pump, a first pressure detector and a second pressure detector; a liquid inlet of the membrane oxygenator is communicated with the arterial cannula; the microembolus filter is circularly communicated with the membrane oxygenator, and the liquid outlet end of the microembolus filter is communicated with the venous cannula; the rolling pump is circularly communicated with the membrane oxygenator; the first pressure detector is communicated with the rolling pump and is used for detecting the outlet liquid pressure of the rolling pump and generating a first pressure signal; the second pressure detector is communicated with the microplug filter and is used for detecting the inlet liquid pressure of the microplug filter and generating a second pressure signal; the structure of the extracorporeal circulation system and the control method of the extracorporeal circulation system are improved, the accuracy and timeliness of medical staff for judging the oxygenation effect of the membrane type oxygenator are improved, the membrane type oxygenator can be replaced in time, a large number of complications can be avoided, and the death rate of patients is reduced.

The utility model relates to the technical field of liquid pressure control, and discloses a positive and negative pressure device for plant in-vitro culture, which comprises a gear pump, a liquid storage tank, a bubble remover, an electric control pressure regulating part, a liquid stirring part and a plant fixing part, and the electric control pressure regulating part comprises a first water flow regulating electromagnetic valve, a second water flow regulating electromagnetic valve and a hydraulic pressure gauge. The plant fixing part is provided with a flow guide pipe connecting pipe, a connecting pipe, a metal cable tie A and a metal cable tie B; according to the positive and negative pressure device for plant in-vitro culture, a nutrient solution is stirred through the liquid stirring part, the nutrient solution is conveyed through the gear pump, the water pressure in the flow guide pipe is controlled and adjusted through the electric control pressure adjusting part, and bubbles in the nutrient solution are filtered through the bubble remover. Therefore, the problems that an existing plant in-vitro culture device cannot culture plants with a nutrient solution under the same water pressure in the plants, the survival time of the plants is short, and leaves are prone to withering are solved.

An active control safety overflow valve is provided with a driving assembly and a pressure sensor, a servo motor is arranged in the driving assembly, and the pressure sensor is used for collecting the pressure of liquid in the overflow valve and controlling the servo motor to act; the servo motor acts to drive the overflow valve to act, and the overflow valve is actively controlled to be opened or closed; the safety overflow valve has the advantages of being accurate in pressure control, capable of achieving self-recovery and high in response speed, the defects of an existing safety overflow valve for shale oil exploitation fracturing are overcome, and the safety and continuity of shale oil exploitation fracturing production are guaranteed.

The invention relates to the technical field of hydrometallurgy production systems, in particular to a solvent regeneration control system for separating zirconium and hafnium through MIBK method centrifugal extraction, which comprises a control module used on a solvent regeneration neutralization reactor, and the control module comprises a heat exchange module; the heat exchange module comprises a heat exchange unit; the heat exchange unit comprises a cooling liquid flow adjusting unit, a cooling liquid temperature detecting unit and a cooling liquid pressure detecting unit. And the heat exchange module is used for controlling the flow of the cooling liquid, the pressure of the cooling liquid and the temperature of the cooling liquid of the heat exchange unit so as to adjust the temperature of the mixed phase in the neutralization reactor. The control system can monitor the flow, temperature and pressure of cooling liquid in real time, accurately control opening, closing and temperature adjustment of the heat exchange unit, quickly respond to temperature change of a mixed phase in the neutralization reactor, remove reaction heat in time, effectively avoid the problem of extraction system emulsification caused by high-temperature decomposition and polymerization of thiocyanic acid in the solvent regeneration process, and improve the extraction efficiency. The solvent regeneration efficiency and quality are ensured.

The utility model relates to the technical field of regulating valves, and discloses a self-operated high-pressure-difference regulating valve which comprises a pipeline assembly and a buffer assembly installed in the pipeline assembly, the pipeline assembly is fixedly installed on the two sides of a valve assembly, a transmission assembly is fixedly installed on the valve assembly, a feedback assembly is fixedly installed on the transmission assembly, and when equipment operates, the buffer assembly is fixedly installed on the pipeline assembly. Water flow passes through the water pipe and flows into the valve assembly, in the process, the liquid baffle is driven by high pressure to rotate and deviate inwards along the rotating rod, meanwhile, the liquid baffle is driven to rebound to the original position under the rebound effect of the rebound spring, part abrasion caused by a water hammer is avoided, meanwhile, liquid pressure is conducted to an inner cavity of the piston cylinder through the communicating pipe, and the valve element and the valve rod are driven to be pressed downwards; in the downward pressing process, the through hole in the communicating position of the through groove and the valve element is gradually reduced, and therefore flowing hydraulic pressure is adjusted more smoothly and stably.

The invention relates to the technical field of methyl alcohol fuel injection system injectors, in particular to a high-pressure-difference methyl alcohol injector for a ship engine, which comprises a gland, an electromagnetic valve assembly, a shell, an ejector rod, a spring, a range limiting disc, a valve body, a valve core bushing, an orifice plate and a valve seat. According to the methanol injector, the fuel inlet is laterally arranged, and the overall flow direction of fuel is side-in and bottom-out, so that the leakage phenomenon possibly caused by insufficient coaxiality of external pipe joints in a conventional fuel jacking installation mode is avoided, and the sealing of an engine cannot be influenced even under severe working conditions such as continuous vibration; according to the methanol injector, methanol supply pressure (hydraulic pressure) is used for assisting in opening of the valve element of the methanol injector, compared with an injector with a conventional direct-drive electromagnetic valve opening valve element, the structure can achieve opening of the methanol injector only through smaller electromagnetic force and lower power consumption, and higher methanol injection pressure can be achieved after the spring and the supply pressure are accurately matched; and more efficient atomization can be realized.

The invention provides a maintenance safety early warning system suitable for a cold regenerator. The maintenance safety early warning system comprises a sensing device, an alarm device and a controller. The sensing device is used for collecting working condition parameters of a target area of the cold regeneration machine, the sensing device comprises a plurality of sensors, the sensors at least comprise a vibration sensor, a hydraulic sensor and a displacement sensor, the vibration sensor is used for detecting the vibration frequency, the vibration amplitude and the vibration speed of a machine body of the cold regeneration machine, and the hydraulic sensor is used for detecting the working condition parameters of the target area. The hydraulic sensor is used for detecting liquid pressure of a hydraulic system of the cold regenerator, and the displacement sensor is used for detecting displacement of a piston rod of at least one supporting leg oil cylinder; the controller is electrically connected with the sensing device, the controller is electrically connected with the alarm device, and the controller is used for controlling the alarm device to be turned on or turned off according to at least one of detection signals of the multiple sensors. According to the scheme, the problem that in the prior art, personnel safety is harmed due to the fact that pressure relief of the supporting legs of the cold regenerator cannot be early warned in time is solved.

The invention relates to the technical field of cutting machines, and discloses an automobile part machining cutting machine which comprises a cutting angle change type control mechanism and a thread type cutting position adjusting mechanism. The movable disc is fixedly installed on the inner rotating ball body, the vertical movable frame is fixedly installed on the top of the movable disc, the horizontal threaded rod can drive the vertical movable frame to move directionally during rotation, and the limiting sliding rod can prevent the movable disc from angle change relative to the horizontal threaded rod. According to the cutting machine for machining the automobile parts, by means of the multi-space-angle rotation capacity of an inner rotating ball body in a hollow ring body, a rotating disc cutter can generate a larger-range cutting angle relative to the parts, so that the applicability of the cutting machine in the cutting angle is improved, in addition, the device achieves the cutting angle locking function through liquid pressure, and the cutting efficiency is improved. And a stable work control function is realized.

To keep control accuracy even when continuously used for a long period of time.SOLUTION: A control device 100 includes: a liquid pressure transmission tube 108 that transmits pressure via liquid to a piston 902 that drives a joint portion 901 of a work device (robot 900); pressure application means (pump 110) that applies the pressure to the liquid; a pressure gauge 104 that measures a pressure value of the liquid; a flow meter 103 that measures a flow rate value of the liquid; a tube deformation correction unit 106 that calculates a flow rate fluctuation value of the liquid according to the pressure value of the liquid using a tube deformation parameter prepared in advance and corrects the flow rate value of the liquid; a joint angle estimation unit 105 that estimates a joint angle from the corrected flow rate value, and a parameter calibration unit (tube deformation parameter calibration unit 120) that calculates a current tube deformation amount from a measurement value of the flow rate value before start of pressure application and a measurement value of the flow rate value after the end of the pressure application and calibrates the tube deformation parameter.SELECTED DRAWING: Figure 1

The utility model discloses a testing machine for testing the sealing performance of a sealing pair of a control valve, which comprises a closed box body, a rotary driving mechanism, a rotary lifting assembly, a lower sample replacement block, a telescopic cylinder, an upper sample replacement block, a liquid pressure supply system and a gas pressure supply system, and the rotary driving mechanism is arranged in the closed box body; the rotary lifting assembly is located in the closed box and is in transmission connection with the rotary driving mechanism. The lower sample replacement block is mounted at the top of the rotary lifting assembly; the telescopic cylinder is mounted in the closed box body and is connected with the rotary lifting assembly; the upper sample replacement block is mounted at the top of the closed box body and corresponds to the lower sample replacement block; the liquid pressure supply system is connected and communicated with the sealed cavity of the upper sample replacement block; the gas pressure supply system is aligned with a sealing interface formed between the upper sample replacement block and the lower sample replacement block; and the leakage detection system is electrically connected with the data acquisition and control system. The device can improve the applicability, quantify the sealing leakage rate of the valve, and comprehensively evaluate the sealing performance of the control valve.

The invention relates to an air compression energy storage method and system based on liquid pressure control, which can improve the energy storage capacity of compressed air energy storage under the condition that the volume of an underground cavity is not increased by means of the action of liquid for pressure control in the underground cavity. The technical problems that in the prior art, the energy storage capacity can only be improved by increasing the size of the underground gas storage cavity, and site selection is difficult and cost is high when the size of the underground gas storage cavity is increased are solved. Moreover, the liquid is injected into the underground cavity, so that the pressure of the underground cavity is kept stable in the energy storage and release processes, on one hand, the energy storage capacity is improved, and on the other hand, the influence of pressure circulation fluctuation on the integrity of the underground cavity is reduced.

The invention discloses a thermocline heat storage device for liquid heat storage, relates to the field of heat storage devices, and solves the problems that when an existing thermocline heat storage device for liquid heat storage is used, it is difficult to guarantee internal liquid circulation and thermocline position temperature stability in multiple modes, and the heat storage conveying efficiency is affected. Comprising a base, a conveying mechanism and a control mechanism, a heat storage tank is fixedly connected to the base, the control mechanism comprises a control frame and a control panel, and an upper through hole and a lower through hole are formed in the control frame. The control frame is driven to ascend and descend synchronously after the upper through hole and the lower through hole are blocked, the purpose of actively sucking liquid into the heat storage tank is achieved, meanwhile, the liquid can be directly conveyed into the heat storage tank through liquid pressure, the positions of the control frame and the control panel are adjusted in the conveying process, and the conveying efficiency is improved. Liquid separation is achieved, and liquid conveying is not affected.

The invention relates to the technical field of vehicle-mounted visual perception, in particular to a camera active anti-shake cooling system based on a magnetorheological fluid medium and a control method. The heat dissipation system comprises a camera module, at least three independent pipelines which are arranged around the camera module and are hollow inside, a hydraulic driving unit, at least one electromagnetic coil which is arranged on the outer wall of the independent pipeline and is used for generating a controllable magnetic field, and a controller, the controller is used for cooperatively controlling the liquid pressure in the pipeline and the magnetic field intensity acting on the magnetorheological fluid according to the vehicle state information and / or the posture information of the camera module so as to achieve active anti-shake and heat dissipation of the camera module. The pressure of the cooling liquid in the pipeline is adjusted to support the camera and change the electromagnetic force between the magnetic fluid and the coil by changing the magnetic field intensity, and lens shaking is reduced in cooperation with a vehicle body active shock absorption system.

The invention relates to the field of water pump production and machining equipment, in particular to accurate press-fitting equipment for a water pump bearing. The water pump bearing accurate press-fitting equipment with the automatic material taking function is provided. Accurate press-fitting equipment for water pump bearings comprises a base, and the top of the base is connected with a first fixing frame; a rodless air cylinder is further included and installed between the first fixing frame and the second fixing frame, a gas-liquid pressure cylinder is installed on a cylinder barrel of the rodless air cylinder, a first elastic telescopic rod is connected to a telescopic part of the gas-liquid pressure cylinder, a connecting frame is connected to the bottom of the first elastic telescopic rod, and a grabbing assembly is arranged at the bottom of the connecting frame. The telescopic part of the gas-liquid pressure cylinder is connected with a first pressing frame and provided with a separation assembly. The bearing main body is automatically grabbed through the grabbing assembly, time and labor are saved, when the bearing main body is pressed by the first pressing frame, an inner ring of the bearing main body is prevented from being stressed through the separating assembly, bearing damage is avoided, and the pressing effect is improved.

The invention discloses a quality inspection and early warning system for impregnated paper production, and relates to the field of quality inspection and early warning for impregnated paper production, and the method comprises the steps: directly measuring the real liquid pressure intensity of a paper immersion area through an impregnation parameter collection module, and generating a dynamic pressure intensity deviation in combination with the theoretical pressure intensity calculated by a dynamic pressure intensity calibration module; the valve opening reference value is matched based on the dynamic pressure deviation, the solvent flow is corrected in real time in combination with the liquid level change rate, and the precipitation risk is evaluated by analyzing the concentration reduction amplitude after solvent supplementation and the duration required by solution stabilization; when the risk reaches an activation condition, triggering an anti-precipitation instruction, according to the anti-precipitation instruction, linking a stirrer to stir in a production intermittent period, and injecting a solute to ensure that the concentration reaches the standard; and recording the water level adjusting time length, the concentration compensation time length and the instruction response time length, triggering graded alarm when time is out, and outputting an interrupt reset instruction to a corresponding adjusting module. And the quality control level in the impregnated paper production process is improved.

The invention discloses a concentric double-pipe continuous negative pressure sand washing device and process. The device comprises a pump truck and a sand washing pipe column structure. The pump truck is used for providing sand washing liquid pressure and displacement for the sand washing pipe column structure; the sand washing pipe column structure comprises a concentric double pipe column, a process pipe, a negative pressure injection pump and a sand washing nozzle. A process pipe; wherein an annular liquid return channel is formed between the outer-layer oil pipe of the concentric double-pipe column and the inner-layer oil pipe of the concentric double-pipe column; a negative-pressure injection pump and a sand washing nozzle are mounted at the bottom of the inner-layer oil pipe; the sand washing fluid shunting channel is divided into two channels; one part of sand washing fluid enters the well bottom through the self-sealing well mouth and the inner-layer oil pipe in sequence, and the sand washing fluid makes contact with the sand surface of the well bottom through the sand washing nozzle; and the other part of the sand washing fluid generates negative pressure through the negative pressure injection pump to discharge the formation produced fluid and mixed fluid of the sand washing fluid and shaft sand grains out of the ground through the annular fluid return channel and the process pipe, and through the concentric double-pipe structure and the negative pressure injection pump, internal circulation of the sand washing fluid and continuous negative pressure sand washing are achieved.

The embodiment of the invention provides an immersed liquid-cooled battery pack, which comprises a battery box shell, the battery box shell comprises a liquid-cooled bottom plate, a top plate, a side plate and a partition plate, a closed space is defined by the liquid-cooled bottom plate and the top plate, and the partition plate divides the closed space into a medium oil area and a functional dry area, the medium oil area is used for filling an immersion medium; the battery module is positioned in the medium oil area and is arranged on the liquid cooling bottom plate; the cooling pipe assembly is arranged on the side, away from the liquid cooling bottom plate, of the battery module, and the cooling pipe assembly and the liquid cooling bottom plate are both used for being filled with a cooling medium. And the immersion medium is sealed in the battery pack and is static, so that the leakage problem caused by the flowing of the immersion medium in a pipeline and the problems of local flowing dead zone, turbulence and inconsistent liquid pressure caused by the flowing of the medium are avoided, the heat dissipation area is increased, and the heat exchange capability of the battery is enhanced.