3692 results about "Exhaust valve" patented technology

A valve timing control device includes: a unit for calculating a target valve timing for one of an intake valve and an exhaust valve in accordance with an operational state; a unit for detecting an actual valve timing of one of the intake valve and the exhaust valve; an actual valve timing control unit for generating a controlled variable for the VVT based on a difference between the target valve timing and the actual valve timing; a unit for learning a learning value of the controlled variable required for maintenance of the actual valve timing based on an integral correction value; and a unit for detecting a malfunction in a VVT from an amount of a shift in the actual valve timing when learning is not completed yet, and for detecting a malfunction in the VVT from the difference when learning is already completed.

The invention relates to a micro-pressure oxygen cabin self-adaptive pressure control method and system based on iterative optimization, belongs to the technical field of pressure control, and aims at solving the problems that existing micro-pressure oxygen cabin pressure control depends on manual repeated debugging, the efficiency is low, and self-adaptive optimization cannot be achieved. The method comprises the steps that in the pressure stabilizing stage of the micro-pressure oxygen cabin, the pressure in the cabin is monitored in real time, and when the pressure exceeds the upper limit or the lower limit of a preset pressure interval, a pressure stabilizing wave crest section or wave trough section opening degree adjusting algorithm is executed so as to adjust the opening degree of an electric exhaust valve. And after the single oxygen therapy process is finished, executing an iterative optimization step: automatically analyzing the pressure data of the current pressure stabilization stage by the system, and iteratively updating the control parameters for the next oxygen therapy process according to the pressure data. According to the method, self-learning and evolution of control parameters are realized through a closed-loop mechanism of real-time adjustment and redisk optimization, the parameters can be quickly converged to the optimal state within multiple times of operation, the debugging period is shortened, and the stability of pressure control is improved.

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.

A vacuum dryer not requiring a vacuum pump according to an embodiment of the present invention comprises: a drying chamber in which a drying rack is installed, and an exhaust valve communicating with the interior is provided on the outside of the other side; a steam generator located outside the drying chamber, having a water tank, and connected to a steam inlet; and a heat pump interlocked with the inside and outside of the drying chamber and configured by including a condenser provided in a high-temperature area, a first heat exchanger connected to the condenser outside the drying chamber, an evaporator provided in a low-temperature area, a second heat exchanger connected to the evaporator outside the drying chamber, a compressor connecting the first heat exchanger and the second heat exchanger, and an expansion valve connecting the condenser and the evaporator.

The invention discloses laser cladding repairing equipment for an exhaust valve rod of a marine main engine. The laser cladding repairing equipment comprises a rotating mechanism, a cleaning mechanism and a repairing mechanism. The rotating mechanism adopts a plurality of stepping motors to drive friction wheels, self-centering clamping and intermittent rotation of the exhaust valve rod are achieved through a hydraulic cylinder and a plane connecting rod mechanism, it is ensured that positioning is accurate, and the rotating mechanism adapts to workpieces with different diameters. The cleaning mechanism is arranged below the rotating mechanism, a centrifugal fan is used for simultaneously driving a grinding disc to rotate at a high speed to conduct surface grinding, scrap iron is discharged in time through the negative pressure suction function of the centrifugal fan, and cleaning and dust removal are integrated. And the anti-diffusion cover and the anti-diffusion plate are matched to form a local closed area, so that dust dissipation is effectively inhibited. The repairing mechanism adopts a mechanical arm to carry a laser cladding head, the curved surface of the valve rod can be tracked with high precision, and automatic cladding is completed. The equipment integrates automatic clamping, efficient cleaning, synchronous dust removal and intelligent repairing, and the automation level, the surface treatment quality and the operation safety of repairing of the exhaust valve rod are remarkably improved.

The present invention relates to the technical field of exhaust valves, and specifically to a pneumatically controlled exhaust valve. The pneumatically controlled exhaust valve comprises a housing, a connecting hole being formed in one end of the housing, and an exhaust channel being formed in a side wall of the end of the housing distant from the connecting hole. An exhaust pipe is mounted in the exhaust channel, and a sealing bolt is installed at an end of an exhaust pipe channel close to an outer side wall of the housing. An exhaust hole is provided on the sealing bolt, and an end of the exhaust pipe distant from the sealing bolt is connected to a swing rod by means of a first spring, a sealing gasket being mounted at an end of the swing rod close to the exhaust pipe. A floating block is disposed in the housing, and the swing rod and the floating block are non-reliably connected. The present invention mounts an alarm device on the exhaust valve such that, when the exhaust valve leaks or cannot exhaust, the alarm device gives a prompt to a user to remind the user to clean the exhaust valve, thereby solving the problem of the time taken for limescale to affect the exhaust valve being shorter than a prescribed time for regular cleaning, causing water supply difficulties or leakage in heating pipes.

A simple structure electric oil pump with an one-way air valve is provided, which includes a control box and an electromagnetic exhaust valve. The control box is provided with a connecting pipe and a control board. One end of the connecting pipe is connected to an oil extraction pipe, and the other end is connected to an oil outlet pipe. The control box is equipped with an intake port and an intake duct. The electromagnetic exhaust valve is equipped with an exhaust tube and an intake tube. The exhaust tube is installed inside the intake port. When the stop button is pressed, the electromagnetic force disappears, and the exhaust tube and the intake tube are in a ventilated status, allowing the connecting pipe to be connected to the outside for exhaust, and external air is discharged into the connecting pipe to destroy the siphon effect of the pipeline.

The invention provides a pressure control system of an MOCVD (Metal Organic Chemical Vapor Deposition) reaction cavity and MOCVD epitaxial equipment, and the system comprises a cavity in which a reaction cavity is defined; the exhaust pipeline is communicated with the reaction cavity; the first pressure gauge is fixed on the cavity body, and the first pressure gauge is used for detecting the gas pressure in the reaction cavity; the exhaust valve is configured to control the exhaust flow through the opening degree of the valve; the vacuum pump is used for extracting gas in the reaction cavity; the mass flow controller is configured to be capable of detecting and controlling the flow of gas flowing into the reaction cavity; and the controller is configured to control the valve opening degree of the exhaust valve and / or control the gas inlet flow of the mass flow controller according to the gas pressure detected by the first pressure meter. According to the pressure control system of the MOCVD reaction chamber, the first pressure meter, the exhaust valve and the mass flow controller are arranged on the chamber body, and the gas pressure can be adjusted in real time, so that the product quality can be effectively improved.

The invention discloses a bearing lubricating oil chamber structure for a double suction pump, relates to the field of pumps, and abandons the situation that a traditional exhaust valve releases oil mist pressure, blades rotate to form a right high-pressure area when a customized bearing rotates, the bottom end of the customized bearing is locally immersed in oil, oil is uniformly carried during rotation and heat is increased, and air in a lubricating chamber is injected into an oil can through the pressure difference of the two sides of the blades; compared with a traditional mode, the lubricating device has the advantages that the uniformity is higher, repeated friction and atomization of the oil can be avoided, the oil enters the oil can along with airflow along with continuous adding of the oil in the lubricating chamber and rising of the liquid level, and the lubricating effect is better. And the oil is cooled and circulated in the return pipe after being filtered by the kettle cover, so that the oil can be continuously and circularly filtered, the reliability of the oil is ensured, the cooled oil can lubricate the bearing and take away heat, long-time high-speed use is met, the oil loss is small, the operation environment of the bearing is stable, and the overall maintenance period is greatly prolonged.

The invention provides an electric pressure cooker. The electric pressure cooker comprises a cooker body and a cooker cover detachably arranged on the top of the cooker body. An air cavity is formed in the cooker cover, and an exhaust valve communicated with the cooker body is mounted in the air cavity; a first air hole for exhausting air is formed in the top of the air cavity; a second air hole and a third air hole are formed in the bottom of the air cavity; the pot body is provided with a second air channel and a third air channel, the air outlet end of the second air channel is located in the middle of the pot body, and the air outlet end of the third air channel is located at the bottom of the pot body; an air exchange mechanism and an air release mechanism are mounted at the air cavity; the ventilation mechanism changes the unblocking and blocking states of the air holes through adjustment, and only outward exhaust is achieved; the gas release mechanism can open the gas release valve through adjustment, so that high-pressure gas in the pot body is discharged; the exhaust direction of high-pressure air leakage can be adjusted and changed, different use environments are met, and the applicability is improved.

The invention belongs to the technical field of transformers, and discloses an explosion-proof sealed oil-immersed transformer which comprises an oil-immersed transformer body, a mounting frame is fixedly mounted at the top of the oil-immersed transformer body, an oil conservator is fixedly mounted on the mounting frame, the bottom of the oil conservator communicates with an explosion-proof oil pipe, and the explosion-proof oil pipe communicates with an oil storage tank. The explosion-proof oil pipe penetrates through and extends into the oil-immersed transformer main body, an oil pump is arranged on the explosion-proof oil pipe, an automatic pressure relief mechanism is arranged on the oil-immersed transformer main body, and the automatic pressure relief mechanism comprises a pressure relief valve cylinder. According to the scheme, through a spring-sealing plug linkage structure in the automatic pressure relief mechanism, when the internal pressure exceeds a threshold value, a sealing plug is pressed to move upwards, a pressure relief hole communicates with a pressure relief cavity, high-pressure gas is directionally exhausted through a one-way exhaust valve, and shell burst is avoided; after the pressure recovers, the reset spring automatically resets the sealing plug, the sealing performance is maintained, external impurities are prevented from invading, manual intervention is not needed, and repeated and reliable pressure relief is achieved.

The utility model discloses a concrete powder storage tank which comprises a tank body, a mixing and drying assembly is installed on the top wall of the tank body, a material lifting assembly is installed on the top of the inner wall of the tank body, and the material lifting assembly is fixedly connected with the mixing and drying assembly. According to the concrete powder storage tank, powder is fed into the tank body from the feeding pipe to be stored, the driving motor drives the rotating shaft to rotate on the supporting plate, the control module controls the electric heating pipe to heat the interior of the tank body, and the exhaust valve is opened, so that moisture existing in the powder in the tank body is exhausted from the exhaust pipe; according to the stirring and scattering device for the powder, when the powder stored in the tank body is stirred and scattered and the interior of the tank body is heated, under the mutual cooperation of the stirring and scattering device and the heating device, moisture in the tank body can be discharged and cannot be continuously gathered in the tank body, the drying degree of the stored powder can be improved, and the storage effect of the powder in the tank body can be kept.

The invention provides a shield tunnel ground surface settlement stress detection device and a pavement settlement treatment method, and relates to the technical field of shield tunnel construction. The detection device comprises a vertically arranged pipe body, the lower end of the pipe body is connected with a hollow elastic bag body, the upper end of the pipe body is connected with a water inlet pipe and an exhaust pipe, the water inlet pipe is provided with a pressure gauge and a water inlet valve, and the exhaust pipe is provided with an exhaust valve. According to the pavement settlement treatment method, an existing ground surface settlement detection mode is changed, measurement of the ground surface settlement amount is changed into measurement of the soil layer internal stress change amount, and a reliable basis is provided for pavement settlement treatment. According to the method, a ground surface settlement area and a soil layer stress reduction area can be quantitatively delineated according to the reduction amount of the water pressure of each elastic bag body, and then targeted grouting is performed, so that the soil layer stress is recovered to a stable and balanced state before tunnel excavation, and the problems of settlement and collapse of a paved pavement after a subway is opened are fundamentally solved.

The invention discloses a dual-fuel engine combustion control method based on hydrogen-ammonia energy ratio and gas distribution overlap angle regulation and control, which comprises the following steps: 1) fuel ratio control: acquiring current operation state parameters of an engine, determining a target AER according to preset mapping, regulating ammonia gas supply quantity and hydrogen supply quantity to enable the actual AER to reach the target AER, and controlling the fuel ratio; the AER is adaptively set according to engine load and combustion stability conditions; 2) valve timing control: adjusting the opening time of an intake valve or the closing time of an exhaust valve through a variable valve timing mechanism so as to change a valve timing overlap angle VOA, wherein the VOA is set to be a negative value, a small overlap angle or a positive overlap angle according to the working condition of an engine; (3) injection time sequence optimization is conducted, specifically, the injection time of ammonia gas and the in-cylinder direct injection time of hydrogen are controlled respectively, and coordinated optimization of a fuel injection strategy and valve timing is achieved; and 4) closed-loop steady-state control: monitoring a combustion state and an emission index in real time, comparing the combustion state and the emission index with a threshold value to serve as a feedback signal, and correcting the target AER and VOA settings in time. According to the dual-fuel engine combustion control method based on regulation and control of the hydrogen-ammonia energy ratio and the gas distribution overlapping angle, the energy ratio of hydrogen fuel and ammonia fuel and the overlapping opening angle of an intake valve and an exhaust valve are dynamically adjusted under different working conditions, so that the combustion reaction rate and temperature are coordinated, and the stable and efficient combustion process is achieved; and harmful emissions of NOx, unburned ammonia and the like are obviously reduced.

The invention belongs to the technical field of exhaust valves, and particularly relates to a composite exhaust valve with an integrated buffering and filtering assembly, which comprises a shell, a supporting block is fixedly arranged at one end of the shell, an air inlet head is fixedly arranged on the supporting block, a cavity is formed in the supporting block, a concave groove is formed in the cavity, and a sealing strip is arranged at the top of the concave groove. Cylinders are connected to the bottom of the concave groove in an array mode, a connecting rod is fixedly arranged at the bottom of the concave groove, a bottom plate is fixedly connected to the bottom end of the connecting rod, and a buffering mechanism is arranged in the cavity. According to the composite exhaust valve with the integrated buffering and filtering assembly, by arranging the filter cylinder and the baffle, efficient buffering and filtering treatment can be conducted on conveyed air pressure, stable operation of pneumatic equipment is guaranteed, the conveyed air pressure enters the cavity after being filtered through the filter cylinder, impurities such as particles in an air source can be effectively intercepted, and the effective circulation section of compressed air can be changed by adjusting the angle of the baffle; the narrower the circulation space is, the slower the airflow speed is, throttling buffering is achieved, and the working stability of the exhaust valve is guaranteed.

The invention relates to a vertical water-cooling self-priming pump, and belongs to the technical field of fluid conveying. Comprising an upper liquid storage cylinder and a lower liquid storage cylinder which are fixedly connected, a water inlet pipe is arranged on the rear side of the lower liquid storage cylinder, a discharge pipe is arranged on the front side of the lower liquid storage cylinder, a water outlet pipe is arranged on the front side of the upper liquid storage cylinder, and an exhaust valve is arranged at the top of the upper liquid storage cylinder; a water-cooled motor is fixedly arranged in the upper liquid storage cylinder, a multi-stage water pump is arranged in the lower liquid storage cylinder and connected with the water-cooled motor through a coupling assembly, and a supporting assembly is arranged between the water-cooled motor and the inner wall of the upper liquid storage cylinder; an overflow protection assembly is arranged at one end, away from the lower liquid storage cylinder, of the water inlet pipe; the problems that an existing self-priming pump is unstable in installation of a special-shaped motor, high in requirement for the environment of a cooling system, low in lift, unstable in long-time operation and liquid overflows when the self-priming pump is closed are solved.

The water passing ball device comprises a starting pipeline with a ball receiving chamber, a water ejecting ball is arranged in the ball receiving chamber, the starting pipeline is connected with an installation pipeline, the installation pipeline forms a ball serving chamber, the installation pipeline is detachably connected with the long conveying pipeline, and the long conveying pipeline is connected with the water ejecting ball. The starting pipeline is connected with an external pipeline used for conveying media to the starting pipeline, the media in the external pipeline can abut against the water jacking ball so that the water jacking ball can overcome the elastic force of the installation pipeline and the elastic force of the long-distance conveying pipeline to move along the long-distance conveying pipeline, air in the long-distance conveying pipeline can be exhausted, the water jacking ball can be filled in the serving ball, the water inlet is connected, and the exhaust valve is opened. According to the invention, a discharge port is not arranged at a high point along the way of the long-distance pipeline, the cost is reduced, and the hidden danger of leakage in the future pipeline operation process is reduced. The water inlet control valve is opened, the ball is pressed to the ball receiving chamber at the tail end of the pipeline by using the pressure of water, and a hydrostatic test is carried out on the pipeline through the pressurizing pump.

The invention discloses a long-distance pressure water conveying pipeline retention air mass discharging method which comprises the following steps: S1, in the water filling process of a long-distance pressure horizontal water conveying pipeline, detecting whether retention air mass exists in the pipeline or not through a flow-pressure difference correlation analysis method; s2, when the retained air mass exists in the horizontal water conveying pipeline, geometric parameters of the retained air mass in the horizontal pipeline are obtained based on an ultrasonic imaging inversion technology, and a dimensionless number n is calculated according to the geometric parameters; s3, when n is larger than 0.8, according to the critical Friedel number, the gravitational acceleration and the diameter of the water conveying pipeline, the starting flow speed of the retention air mass is calculated; s4, when n is smaller than or equal to 0.8, multiple stresses of the retained air mass in the horizontal water conveying pipeline are calculated according to the geometric parameters, and the starting flow speed of the retained air mass is calculated through the multiple stresses; and S5, a water conveying power mechanism of the water conveying pipeline is controlled to adjust the flow of the water conveying pipeline till the average flow speed of the water conveying pipeline is larger than the starting flow speed, and the retained air mass is conveyed to a downstream exhaust valve of the water conveying pipeline to be discharged.

The invention discloses a swash plate type automobile air conditioner compressor, and relates to the technical field of swash plate type compressors, the swash plate type automobile air conditioner compressor comprises a shell, circulating air bins communicated with a compressed air pipe are arranged on the surfaces of the two sides of the shell, and an air outlet pipe and an air inlet pipe are arranged on the upper surfaces of the circulating air bins; a diversion valve used for switching communication paths of the compressed air pipe, the air outlet pipe and the air inlet pipe is arranged in the circulation air bin, an additional mechanism is further arranged on the upper surface of the circulation air bin and comprises an air entraining assembly and a detection assembly, and the air entraining assembly comprises an air outlet additional pipe and an air inlet additional pipe. The air outlet additional pipe is fixedly installed on the upper surface of the air outlet pipe, the detection assembly comprises a center fixing plate, and the center fixing plate is fixedly installed in the center of the interior of the air inlet additional pipe. In the scheme, the additional mechanism is arranged, the air entraining assembly and the detection assembly work cooperatively, the air inlet and outlet speed is effectively balanced, and impact abrasion of an exhaust valve plate is relieved; and the sealing performance and the exhaust efficiency are guaranteed.

The utility model discloses a biological sample low-temperature preservation device. A freezing storage set and a rotating assembly are placed in a low-temperature storage cavity; the bottom of the lifting part is arranged at the top, located in the transition area, of the heat preservation tank body, a lifting assembly is arranged at the top of the lifting part, and a lifting part of the lifting assembly can sequentially penetrate through the heat preservation taking and placing part and the transition part and extend into the heat preservation part; the first liquid level sensor, the liquid inlet pipeline, the first temperature sensor and the second liquid level sensor are all located in the heat preservation tank body, the first liquid level sensor and the liquid inlet pipeline are both close to the lower surface of the rotating disc, the first temperature sensor is located on the peripheral wall face of the rotating disc, and the second liquid level sensor is located on the inner top of the heat preservation tank body. The liquid inlet valve is communicated with the liquid supplementing valve, the liquid supplementing valve is communicated with the liquid inlet pipeline, the exhaust valve is communicated between the liquid supplementing valve and the liquid inlet valve, and the exhaust valve is communicated with the vertical channel; the second temperature sensor is located in the cylinder. When the cryopreservation box is taken and placed, the cryopreservation box is in a low-temperature area of-80 DEG C to-170 DEG C, so that the biological sample is always in a protection state.

Control system (5) for intake (1) and exhaust (2) valves of an internal combustion engine system, configured to control the valves (1, 2) to pass between a first configuration in which they do not cooperate in contact in a respective seat (4) of the engine system and a second configuration in which they cooperate in contact with said seat (5), and comprising a control system with cams (6) configured to control the opening and closing of the valves (1, 2) to allow the production of a driving torque by the engine system and to selectively control the opening and closing of at least one of the exhaust valves (2) to allow the production of a braking torque by said engine system.

The invention provides a radiotherapy abdominal pressure plate device capable of monitoring abdominal external pressure in real time, and the device comprises a thermoplastic film which is provided with a fastener; the abdominal pressure plate body is fixedly connected to one side of the thermoplastic body film; the pressurizing air bags are distributed on the abdominal pressure plate in an array mode, air inlet valves are arranged on air inlet pipelines of the pressurizing air bags, exhaust valves are arranged on exhaust pipelines of the pressurizing air bags, and air pressure sensors are arranged in the pressurizing air bags; a thin film pressure sensor; the control module is used for judging whether the patient is in an inspiration phase or an expiration phase in real time according to numerical values detected by the multiple thin film pressure sensors, and controlling the air inlet valves or the exhaust valves on the corresponding pressurizing air bags to be opened so as to adjust radiotherapy pressure; and judging the pressure difference according to the detection values of the air pressure sensors on the two adjacent pressurizing air bags and carrying out cooperative compensation. By means of detection of the thin film pressure sensor and the air pressure sensor, the breathing phase is dynamically recognized, pressure is actively released in the inspiration phase, pressure is compensated in the expiration phase, and the displacement error of the target area can be controlled to be smaller than or equal to 2 mm.

The invention discloses an exhaust valve self-adaptive noise reduction method based on environmental noise recognition, and belongs to the technical field of exhaust valve data noise reduction. The problem that noise reduction parameters of an exhaust valve cannot be automatically generated according to the actual environment noise condition at present, and then signals cannot be effectively processed is solved. The method comprises the following steps: acquiring a noisy exhaust valve audio signal, preprocessing and standardizing the signal, then sending the signal into a deep learning model for identification to obtain an environment category of a valve audio, and acquiring a binary mask corresponding to a prior environment category according to the environment category; performing short-time Fourier transform on the preprocessed audio to obtain a frequency amplitude spectrum Yn (f) and a phase phi n (f) of a signal; and performing point-by-point multiplication operation on the Yn (f) and a binary mask Mv (f) corresponding to an environment category to obtain a signal, and performing inverse STFT based on the phase phi n (f) to recover a time domain signal # imgabs0 # to synthesize a continuous waveform through an overlap-add method.

The utility model discloses a battery box body, a battery pack and a new energy automobile. Belongs to the technical field of vehicles and comprises a beam body, the beam body defines an exhaust channel, a first exhaust hole and a second exhaust hole are formed in the two sides of the beam body in the width direction of the beam body respectively, and the first exhaust hole and the second exhaust hole are staggered in the height direction of the beam body. The exhaust valve of the battery cell on one side of the beam body is communicated with the exhaust channel through the first exhaust hole, the exhaust valve of the battery cell on the other side of the beam body is communicated with the exhaust channel through the second exhaust hole, and when thermal runaway happens to the battery cell on one side of the beam body, high-temperature and high-pressure gas generated by the battery cell can be exhausted into the exhaust channel. The staggered first exhaust holes and the second exhaust holes can prevent gas exhausted into the exhaust channels from being directly exhausted to the battery cells on the other side of the beam body, the risk that the battery cells on the other side of the beam body are heated can be reduced, and therefore the safety risk can be reduced.

The invention discloses an efficient thermodynamic system based on a wide pressurization module and an operation method of the efficient thermodynamic system. The efficient thermodynamic system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and a generator. A pressurizing cylinder of the wide-width pressurizing module and the high-pressure cylinder are coaxially arranged; one end of a main steam pipeline mother pipe of the main steam pipeline is connected with the boiler, and the other end is connected in parallel with first and second steam inlet branches; a first steam inlet regulating valve and a second steam inlet regulating valve are respectively arranged on the first steam inlet branch and the second steam inlet branch; the pressure cylinder is connected with the second steam inlet branch and the water supply wide-range heat booster through a first steam exhaust pipeline and a first steam extraction pipeline; a first steam exhaust valve and a first steam extraction valve are respectively arranged on the first steam exhaust pipeline and the first steam extraction pipeline; one end of the first steam exhaust pipeline is connected with a steam exhaust port of the pressure cylinder, the other end of the first steam exhaust pipeline is connected to the second steam inlet branch, and a third steam inlet adjusting valve is arranged on the second steam inlet branch between the first steam exhaust pipeline and the first steam inlet branch. The system can efficiently operate under high load, the construction cost is low, and the operation flexibility is improved.

A cushion airbag device is provided in a lower part of a seat cushion in a vehicle seat, and includes a cushion airbag inflated in a vertical direction by being supplied with gas from a pressure accumulation tank, a control valve provided in a first pipe communicating the cushion airbag and the pressure accumulation tank and adjusting an internal pressure of the cushion airbag, an exhaust valve provided in a first pipe between the control valve and the cushion airbag and exhausting gas from the inside of the cushion airbag, and a switching valve provided in a second pipe communicating the cushion airbag and the pressure accumulation tank and opened at the time of collision of the vehicle.

The utility model discloses an exhaust valve and a battery cover plate assembly, the exhaust valve comprises an inner valve body, a movable piece, an outer valve body and a limiting piece, the inner valve body is provided with a first opening and a second opening, and the first opening is used for being communicated with an exhaust hole of gas production equipment; the movable part is movably arranged at the second opening, partially covers the upper end face of the inner valve body and is in clearance fit with the inner valve body to form an exhaust channel. The inner valve body is sleeved with the outer valve body, and an exhaust port of the outer valve body communicates with the exhaust channel. A sealing piece and a limiting piece are arranged at the first opening of the inner valve body; the movable part and the limiting part have a first state of contact fit at the first position, and the limiting part and the sealing part are in pressing fit to enable the exhaust port to be in a sealed state; in a second state of contact fit at the second position, the limiting piece and the sealing piece are in clearance fit to enable the exhaust hole and the exhaust channel to be in a communicated state; the first position is away from the vent relative to the second position. The exhaust valve can realize automatic exhaust of gas, and ensures that liquid is not discharged during exhaust.

The utility model discloses liquid cooling cabinet type dummy load equipment which comprises a cabinet body, a heating tank is arranged in the cabinet body, a liquid inlet pipeline is arranged on one side of the cabinet body and communicated with the bottom of the heating tank, a liquid outlet pipeline is arranged on the other side of the cabinet body and communicated with the top of the heating tank, and the heating tank is provided with a plurality of electric heating rods transversely inserted into the heating tank. The liquid inlet pipeline is provided with a first pressure sensor, a first regulating valve, a first temperature sensor and a filter, the liquid outlet pipeline is provided with a second pressure sensor, a second regulating valve and a second temperature sensor, a blow-off valve is arranged at the bottom of the heating tank, and an exhaust valve is arranged at the top of the heating tank. Through the combined design of the plurality of electric heating rods, the heating value can be adjusted as required, the number of the electric heating rods inserted into the heating tank can be controlled, and the adjustment of the heating value at different powers of 0-120kW can be realized, so that the heating value of a high-power cabinet load and the rapid change of the load can be simulated, and the cooling simulation test of the server cabinet can be realized.

The invention relates to the technical field of low-temperature propellant filling, in particular to a liquid oxygen propellant filling system and a pre-cooling pump starting method thereof, and provides the liquid oxygen propellant filling system which cancels a filling bypass, reduces the bypass leakage risk, enables the whole filling system to be more simplified, and improves the filling efficiency. The invention further provides a pre-cooling pump starting method of the liquid oxygen propellant filling system. The pre-cooling pump starting method comprises the following steps that the pipeline is pre-cooled, the filling valve at the liquid oxygen storage tank end is opened, the filling valve at the rocket liquid oxygen storage tank end is closed, the exhaust valve is opened, liquid oxygen flows through the pipeline, and the pipeline is pre-cooled. Pre-cooling the storage tank, namely pre-cooling the storage tank after the pipeline is pre-cooled; starting the pump for pre-cooling, starting the liquid oxygen filling pump at low frequency, and gradually increasing the frequency of the liquid oxygen filling pump. Storage tank filling is carried out through the high-position pump and the low-position pump, liquid oxygen does not need to be extruded into the storage tank through bypass pressure increasing, the precooling flow process does not need to be interrupted, procedure conversion of liquid oxygen precooling and large-flow filling is not needed, the operation difficulty is reduced, and the filling time is shortened.

The utility model provides a preparation subpackaging device which comprises a main pipeline, branch pipelines, a driving pump and an exhaust pipe, the near end of the main pipeline is communicated with a stock solution bag, a plurality of branch pipelines are communicated with the main pipeline, one of the branch pipelines is communicated with the far end of the main pipeline, each branch pipeline is independently provided with a subpackaging valve and a subpackaging container, and the driving pump is communicated with the exhaust pipe. The driving pump is arranged on the main pipeline between the branch pipeline and the stock solution bag, the exhaust pipe is arranged on the main pipeline between the driving pump and the stock solution bag, a main valve is arranged on the main pipeline between the exhaust pipe and the stock solution bag, and an exhaust valve is arranged on the exhaust pipe. According to the preparation split charging device, only one exhaust pipe is arranged, contact with outside air is reduced, the risk that microorganisms pollute a pipeline is reduced, the split charging amount is controlled through the weighing sensor, the split charging uniformity and accuracy can be ensured, high-speed split charging is achieved, residual preparations in the pipeline can be emptied to be recycled, and the production efficiency is improved. And waste is reduced.