258 results about "Drainage amount" patented technology

Water contained in cathode effluent from a cathode (1B) of the fuel cell power plant is condensed by a condenser (8) and recovered to a water tank (10). Water in the water tank (10) is supplied from a pump (17) to a humidifier (4) which humidifies hydrogen-rich gas supplied to an anode (1A) via a water passage (9B). When the power plant stops operating, a controller (30) first recovers water in the water passage (9B) to the water tank (10). Also, the freezing probability of the water passage (9B) is determined from the temperature detected by an outside air temperature sensor (31), and a wait time is set according to the freezing probability. By opening a drain valve (15) and draining residual water in the water passage (9B) after the wait time has elapsed, freezing of the water passage (9B) can be prevented with a minimum water drainage amount.

An intelligent cerebrospinal fluid drainage control and recognition warning system mainly comprises a microcomputer system (1), a flow control device (2), an infrared drop number sensor (3), a color recognition sensor (4), a pressure sensor (5), a communication module (6), a human-computer interaction interface (7) and a radio frequency recognition device (13). The intelligent cerebrospinal fluid drainage control and recognition warning system can independently set the discharge speed, the drainage amount per unit time, the drainage time interval and the drainage pressure of cerebrospinal fluid according to individual differences of patients or clinical needs so as to achieve fixed-speed discharge, quantitative discharge, timed discharge and personalized-pressure discharge of the cerebrospinal fluid; meanwhile, in the drainage process, the color recognition sensor (4) can make timely prewarning when the cerebrospinal fluid has a hemoglobin reaction.

The invention relates to a method for determining and building bound water for a crack-pore (hole) type reservoir core. The method sequentially comprises the following steps of: (1) selecting a crack-free reservoir core; (2) preparing formation water and simulated oil; (3) cleaning and emptying the core, saturating the formation water, driving water by dry gas or the simulation oil until the water does not come out, and thus obtaining the saturation degree of the bound water of a basic rock; (4) perforating the core; (5) calculating the saturation degree of the bound water of the crack-pore (hole) type reservoir core; (6) putting the core into a clamp, and quantitatively saturating bound water for the core; (7) heating the clamp under negative pressure until the system temperature is 120 DEG C, so that the water becomes steam and uniformly distributed; and (8) opening an inlet of the clamp, injecting the simulated oil or the dry gas for displacement, recording a water drainage amount,and thus obtaining the actual saturation degree of the bound water of the core. According to the method, the principle is reliable, the operation is easy, and a reliable physical simulation basis is supplied to a seepage experiment of a crack-pore (hole) type reservoir.

The invention relates to a steam liquid separation method for segmented steam liquid phase transformation heat exchanger and the heat exchanger thereof. The method is characterized in comprising: 1) disposing a straight-through collecting box on each of the two ends of at least one group of heat exchange tube, disposing a plurality of liquid leaking steam resisting devices in the two collecting boxes in stagger manner, dividing the two collecting boxes into a plurality of liquid separating spaces connected in sequence, and disposing at least one equivalent main hole and a plurality of equivalent auxiliary holes at the liquid leaking steam resisting device; 2) when less liquid exists in the liquid separating space, the liquid film formed on the main hole and the auxiliary hole top can resist the steam and liquid from entering the liquid separating space of the next collecting box; 3) when more liquid exists in the liquid separating space, the liquid can firstly break the main hole with larger diameter to flow out caused by the pressure, while the auxiliary holes with smaller diameter is sealed by the liquid film formed on the top; 4) when the liquid layer thickness in the liquid separating space increases, the liquid can breaks the liquid films of the auxiliary holes with smaller diameter step by step and flows out from the main hole and the auxiliary holes. The invention effectively solves the problem the drainage amount is limited existing in the current heat exchangers.

The invention discloses a gas drainage method and equipment with alternative drainage, which are applicable to increasing the drainage diameter of a gas drainage drilling hole and improving the total gas drainage amount of the drilling hole. A main drainage pipeline at the front part and the rear part of a gas pump is connected with bypass pipelines in parallel by a front three-way ball valve anda rear three-way ball valve; the main drainage pipeline at the front part of the front three-way ball valve is connected with a high-pressure gas storage tank; the rear part of the high-pressure gas storage tank is connected with a gas filling pipeline controlled by a gas filling control ball valve; the gas filling pipeline is connected onto the main drainage pipeline between the rear three-way ball valve and the gas pump; a gas drainage pipe in the gas drainage drilling hole is connected with the main drainage pipeline to carry out gas drainage; in the operation process of the gas pump, by controlling the states of the front three-way ball valve, the rear three-way ball valve, the gas filling control ball valve and an outlet control ball valve, extracted gas flow and pressed-in gas flow occur alternatively on the gas drainage drilling hole, the cracks of coal bodies around the drilling hole are enlarged continuously under the action of alternative stress and develop gradually towardsthe deep part, so that the total gas drainage amount of the drilling hole is improved. The method and the equipment are simple, the operation is convenient and the cost is low.

The invention provides a drainage system and method for an air conditioner. The drainage system for the air conditioner comprises a water pan, a pressure sensor arranged at the bottom of the water pan, a control mainboard connected with the pressure sensor and a water pump for draining condensate water of the air conditioner. The pressure sensor is used for detecting pressure of water in the water pan, and a pressure value obtained through detection is transmitted to the control mainboard as a pressure feedback signal. The control mainboard outputs a control signal for increasing or decreasing the voltage of the water pump to the water pump according to the pressure value in the pressure feedback signal, so that the rotating speed of the water pump is increased or decreased. According to the scheme, the pressure sensor is arranged at the bottom of the water pan, the voltage of the water pump is adjusted according to the detected different pressure signals, and therefore the rotating speed of the water pump can be controlled to meet the need for the water drainage amount; and the water drawing capacity of the water pump is increased, noise can be lowered, and energy / electric energy can be saved.

The invention discloses a self-adaption encephalic cerebrospinal fluid drainage device which comprises a drainage catheter (1), a connecting catheter (2) and a liquid storage device (3). A drainage controller (6) is arranged on the connecting catheter (2); a pressure sensor (13) is arranged at the front end of the drainage catheter (1) and connected with the drainage controller (6) through a data line (12); the pressure sensor (13) is used for monitoring encephalic pressure and sending monitored pressure information to the drainage controller (6); the drainage controller (6) is used for controlling the drainage speed and drainage amount of liquid in the drainage catheter (1) according to the pressure information sent by the pressure sensor (13). The self-adaption encephalic cerebrospinal fluid drainage device can continuously monitor the encephalic pressure change condition of a patient in real time, the drainage amount can be precisely adjusted dynamically according to the monitoring result, and the drainage amount is precisely measured and controlled through a flowmeter.

The invention discloses a treatment instrument for intracranial pressure monitoring and drainage and replacement of cerebrospinal fluid. The treatment instrument combines the drainage treatment technology of a cerebrospinal fluid waist penetrating pipe with the computer virtual instrument technology. The treatment instrument comprises an outer connecting pipe, a pressure monitoring branch, a drainage loop and a replacement loop, wherein the pressure sensor transfers real-time pressure of the cranial cavity to a control system; and the drainage loop and the replacement loop feed back drainage amount and replacement amount to the control system which controls a drainage device / replacement device to work or stop so as to drain / replace the cerebrospinal fluid. The instrument can be widely applicable to places where the intracranial pressure of a patient needs to be continuously monitored and drainage and replacement needs to be carried out on the cerebrospinal fluid in the neurology department and the neurosurgery department, replaces the current manual drainage and replacement operations carried out according to experience, realizes automation of the sections such as pressure monitoring, drainage and replacement in treatment and can continuously acquire and store real-time data in treatment.

The invention relates to a automatic drainage system for a cable tunnel, which belongs to the field of drainage. The cable tunnel automatic drainage system comprises a cable tunnel (1), a water collecting well (2), a main drainage pipeline (3), a submersible pump A (4), a submersible pump B (5), a high water level probe (9), a low water level probe (10), a zero water level probe (11), and the like. In low water level, the submersible pump A (4) is started to drain water; and in high water level, the submersible pump B (5) is simultaneously started to drain water. The invention has the advantages of high automation degree, timely drainage and large drainage amount and forcefully ensures that the cable in a tunnel is safe.

The invention discloses a drainage system and method. The drainage system comprises a water pump set which is provided with at least two water pumps, a control mechanism for controlling the water pumpset to run, and at least one water level sensor which is used for detecting the water level information, and the water pumps in the water pump set and the water level sensors are all connected with the control mechanism; the water level sensor is used for detecting the water level information and sending the detected water level information to the control mechanism; the control mechanism is usedfor indicating the water pumps in the water pump set to conduct drainage when the water level information satisfies a preset condition. By means of the drainage system and method, when water bursts, water permeation or water gushing accidents break out in a mine, the water pump set in the drainage system can be timely started to conduct drainage, and the occurrence of safety accidents is prevented; meanwhile, through the arrangement of the at least two water pumps, when the drainage amount is not large, the two water pumps take turns to work, the starting frequency of the water pumps is reduced, the running time of the water pumps is shortened, and the equipment fault rate is lowered.

The invention provides a method of using high-pressure water injection to prevent and treat gas coal dust, and relates to a method of using coal seam water injection to prevent and treat the gas coal dust. The method comprises the steps of constructing a bedding drainage borehole, inserting a drainage tube into the borehole, sealing a hole sealing section of the borehole, and beginning to conduct drainage of the gas in the coal seam; regarding a second borehole as a water injection hole, dismantling a second drainage pipeline and a second orifice plate flowmeter which are connected to the second drainage tube, and inserting an expansion hole packer into the second drainage tube; connecting the expansion hole packer with a high-pressure valve, a water injection flowmeter, a high-pressure water injection pump and an underground water supply pipe sequentially through a high-pressure rubber hose; utilizing the high-pressure water injection pump to inject water into a second borehole implement coal seam; turning off the high-pressure valve. According to the method, injection-drainage boreholes are utilized to alternately arrange and implement the coal seam water injection, the gas drainage amount of adjacent drainage boreholes can be increased, the gas gushing amount during digging is reduced, the water content of the coal seam is increased, the dust concentration during digging is reduced, the working environment of working staff is improved, and mine gas coal dust disasters are effectively prevented and treated.

The invention discloses a control method for detecting drainage of a washing machine and the washing machine, and belongs to the technical field of washing. The control method includes the steps of starting timekeeping from the moment of drainage and recording the initial water level; performing water level detection once every preset time; comparing the current water level with the previous waterlevel; if the water level change value is smaller than a constant K, giving an alarm. The washing machine is controlled by the control method. By performing detection once every preset time, the detection frequency is increased, breakdown can be found in time, and long-time waiting is avoided; if the comparison between the current water level and the previous water level indicates that the waterlevel changes, it is shown that drainage is being preformed; the set constant K is used for detecting whether the drainage amount is normal or not so as to prevent blockage of a drainage pipe.

The invention relates to an advance pre-grouting construction method for an underwater tunnel in case of a fault zone. As for the advance pre-grouting construction method for the underwater tunnel in case of the fault zone, the structure is simple, construction is convenient, cost is low, and construction safety can be ensured. According to the technical scheme, the construction method has the following steps that a, tunnel face advance geological forecast is carried out on the tunnel face of the underwater tunnel; b, advance drilling and core taking are carried out, and the water drainage structure of the tunnel face of the underwater tunnel and the location of a fault ahead are judged accordingly; c, advance pre-grouting parameters are determined according to the geological conditions, detected in the steps a and b, of surrounding rock in front of the tunnel face of the underwater tunnel; and d, advance drilling construction for advance pre-grouting is carried out through a drilling and grouting integrated machine, grouting for water shutoff is carried out through a conventional grouting device after drilling construction is completed, at this moment, the drilling and grouting integrated machine is moved to the next hole position, and when water is drained and the drainage amount of water is larger than 50L / s in the drilling process of the drilling and grouting integrated machine, the drilling and grouting integrated machine is adopted for grouting to stop water.

The invention discloses an interception and drainage pressure-reduction anti-floating system which comprises a waterproof curtain arranged around an underground structure. A plurality of water collecting pits are formed below a bottom plate of the underground structure. Immersible pumps and water level induction switches are arranged in the water collecting pits. Well holes are formed in the bottoms of the water collecting pits. Pressure-reduction well pipes are arranged in the well holes. Anti-filtration layers are arranged around the pressure-reduction well pipes. The tops of the pressure-reduction well pipes are higher than openings of the well holes. The anti-filtration layers are located in the water collecting pits. The pressure-reduction well pipes are mainly formed by axially and vertically stacking a plurality of non-fine concrete well rings. The non-fine concrete well rings comprise upper annular ring beams, lower annular ring beams, stand columns and non-fine concrete wedge-shaped blocks. By means of cooperative work of the system, buoyant force on the bottom plate can be effectively reduced, the drainage amount can be controlled, the surrounding is protected against surface subsidence caused by the too large drainage amount, the number of uplift piles and the number of uplift anchor rods are greatly decreased, non-fine concrete blocks can be conveniently dismounted and replaced, and it is guaranteed that a pressure-reduction well has enough durability.

The invention provides a method for cleaning and producing dioscorea zingiberensis saponin with microbial technology adopted, and belongs to the field of bioengineering. The method solves the problems that in the existing dioscorea zingiberensis industry, wastewater and waste residues are large in drainage amount, and dioscorea zingiberensis starch is not utilized effectively. The method includes the following steps: releasing dioscorea zingiberensis saponin with microorganism adopted firstly, obtaining fermentation liquor containing the dioscorea zingiberensis saponin and the starch; and then processing the starch in the fermentation liquor with a two-enzyme method adopted and obtaining hydrolyzed sugar, and further releasing the dioscorea zingiberensis saponin; conducting solid-liquid separation on dioscorea zingiberensis mash; gathering the hydrolyzed sugar and the dioscorea zingiberensis saponin with microfiltration and nanofiltration membrane separation adopted in sequence, or obtaining intracellular products and dioscorea zingiberensis saponin through specific microbial fermentation separation, and obtaining the dioscorea zingiberensis saponin by hydrolysis of glycosidase and a small amount acid and extraction of a small amount of organic solvent on concentrated dioscorea zingiberensis saponin solution. According to the method, the yield coefficient of the dioscorea zingiberensis saponin is high (90-95%), wastewater quantity is little in the process of production, degree of contamination is low, microbial treatment is low in cost and short in use time, the dioscorea zingiberensis starch is recycled fully, and the method has a great industrial application promotion value in the dioscorea zingiberensis industry.

The invention discloses a water inlet valve and a toilet flushing system with the same. The water inlet valve comprises a valve body; the valve body is provided with a water inlet cavity, a first water outlet cavity and a second water outlet cavity, the first water outlet cavity is communicated with the water inlet cavity through a first valve opening, and the second water outlet cavity is communicated with the water inlet cavity through a second valve opening; the valve body is internally provided with a first switch assembly and a second switch assembly, and the first switch assembly is usedfor opening or closing the first valve opening so as to open or close a flow path between the water inlet cavity and the first water outlet cavity; the second switch assembly is used for opening or closing the second valve opening so as to open or close a flow path between the water inlet cavity and the second water outlet cavity. According to the structure of the water inlet valve, a waterway ofthe toilet flushing system can be smoothly switched, the switching points are consistent, and the situation that the drainage amount of a toilet is significantly different every time is prevented.

The invention relates to the field of kitchen appliances, in particular to a method and device for detecting abnormity of a drainage pipeline. The method for detecting the abnormity of the drainage pipeline comprises the steps of controlling a first preset time when water is drained from a dish washing machine, and detecting the first drainage amount within the first preset time; according to thefirst preset time and the first preset drainage amount, determining the drainage speed; according to the first drainage amount, and / or according to the drainage speed and the theoretical drainage speed of the drainage pipeline, determining the blockage state of the drainage pipeline. The method and device can accurately detect whether the drainage pipeline is blocked or not in time, and thereforethe phenomenon that sewage cannot be drained smoothly when the drainage pipeline is blocked is avoided.

The invention discloses an intelligent plunger type water drainage and gas collection device which comprises a tube body. A control device, a valve device and a rubber sealing sleeve are arranged in the tube body. The control device comprises a pressure sensor, a control circuit board and a battery pack which are electrically connected in sequence from top to bottom. The pressure sensor is arranged below the inner wall of a pressure led-in opening. The valve device comprises a screw motor and an on-off sealing assembly from top to bottom, wherein the screw motor is provided with a motor on-off sliding block, and an on-off sealing connector is arranged on the upper portion of the on-off sealing assembly. A gas-liquid channel penetrating through the sealing assembly up and down is formed in the sealing assembly, a first gas-liquid opening is formed between the on-off sealing connector and the screw motor, and a second gas-liquid opening is formed in the lower portion of the tube body. The rubber sealing sleeve is arranged below the first gas-liquid opening and is arranged on the outer side face of the tube body in a sleeving mode. The intelligent plunger type water drainage and gas collection device is high in degree of automation, the working state can be monitored at any time, the water drainage amount can be adjusted according to the self pressure of a downhole, the well bore structure and equipment do not need to be changed, the applied well condition range is wide, and the device can be adapted to the change of a gas well flexibly.

The invention discloses a posterior cranial distraction and drainage device used in the neurosurgery department. The posterior cranial distraction and drainage device comprises a base, wherein a waste fluid collecting box, a supporting rod, a cleaning liquid storage box and a power supply are respectively arranged at the top end of the base, the supporting rod is distributed in the middle of the top end of the base, the waste fluid collecting box, the cleaning liquid storage box and the power supply are all distributed on the side face of the supporting rod, the waste fluid collecting box and the cleaning liquid storage box are arranged in a bilateral symmetry mode, the power supply is distributed on the front side of the waste fluid collecting box and the cleaning liquid storage box, and a mounting support is arranged at the top end of the supporting rod. The posterior cranial distraction and drainage device ensures that the cleaning liquid temperature is always in a normal temperature state through a temperature sensor and a heater, provides a comfortable treating environment for a patient, makes the drainage process easy to control through a flow control valve, ensures that the drainage amount is always in a normal range, relieves the pain of the patient in operation and brings convenience to medical workers in work.

The invention discloses a novel sand mixing skid and a control system of the novel sand mixing skid. The novel sand mixing skid is composed of a liquid inlet portion, a sand inlet portion, a mixing portion, a liquid drainage portion and the like. The liquid inlet amount, the liquid outlet amount and the sand inlet amount can be calculated through the detected liquid drainage amount and the set sand ratio. The liquid inlet amount and the sand inlet amount are controlled according to the height of the liquid level of a mixing tank (128). Execution elements serve as a four-piece hydraulic motor for a hydraulic system. The four-piece hydraulic motor drives a liquid suction pump (115), a liquid drainage pump (113), a sand supply device (117) and a stirring device (119). Electro-hydraulic proportional valves and electromagnetic valves serve as control elements. Work is completed through control over the sequence of the electromagnetic valves and openings of proportional valves. The novel sand mixing skid has the advantages of being low in cost, high in work efficiency and good in sand mixing effect.

The invention discloses a floor drain which comprises an upper cover and an outer frame surrounding the outer side of the upper cover. A certain amount of running water gaps are arranged above the upper cover, and a floor drain body is arranged below the upper cover. A middle layer board is further arranged in the outer wall of the floor drain body, and the upper cover is connected with the middle layer board through a connection pillar. A clamping position provided with a concave portion extends upwards from the edge of the middle layer board, and a water seal can be formed by the clamping position and the downwards-protruding portion of the outer frame. A containing cavity for containing accumulated water is formed by the middle layer board, and a supporting pillar extends downwards from the bottom of the inner side of the middle layer board. A drainage hole is further formed in the middle layer board, the clamping position with a concave portion is arranged outside the drainage hole, and a water seal can be formed by the clamping position and the protruding portion of the bottom end of a drainage valve. Portions, opposite in position, of the middle layer board and the upper cover are provided with two sets of magnets respectively, wherein the magnets are opposite in magnetic pole. The magnet located below is provided with a guiding pillar, and a containing pillar is arranged on the outer side of the guiding pillar. The floor drain can be automatically opened according to the drainage amount, and the good water sealing and leakage preventing effects are achieved.

The invention provides an oil and gas field production capacity prediction method and device. The method comprises the steps of acquiring a water flooding characteristic curve of an oil and gas field from oil field production data; determining a function relation between stage oil production and liquid production of the oil and gas field according to the water flooding characteristic curve; generating an oil and gas field production capacity prediction result according to the production capacity data in the oil field production data and the function relation between stage oil production and liquid production of the oil and gas field. Since the water flooding characteristic curve of the water flooding oil field is used for predicting the oil and gas field production capacity, in combination with production indexes in an oil filed plan, the liquid drainage amount and the water production amount needed from completion of the oil production index can be calculated, the oil and water production under a certain liquid production plan can also be calculated, the effect of considering the influence of production fluctuation in a prediction model is realized and higher-accuracy production fitting is realized.

The invention relates to a self-adaptive cofferdam lake gradual collapse coupling prediction model which is characterized by comprising the following steps: fitting a cofferdam lake water level-reservoir capacity curve to obtain the total water volume W0 of a reservoir area before dam collapse; deciding a breach width bm and a breach depth hm; calculating a dam break maximum flow of the dam site section to obtain the reservoir capacity Wm corresponding to the break depth hm; calculating the average volume sand content percentage p; calculating the maximum water depth ratio [beta]m of the dam break position; calculating an expansion duration tau; calculating a real-time dam break flow process q(t), and calculating a drainage amount W(tau); checking whether the product is in an acceptable range; calculating duration T after the dam break flood peak; deducing a post-peak flow process; calculating the residual water quantity W(T) in front of the dam; checking whether the product is in an acceptable range; and integrating the obtained pre-peak and post-peak flow processes q(t). According to the method, the possible maximum flood peak flow can be obtained, the dam break flood process can be deduced together, the dam break flood flow process can be quickly obtained, and a reference is provided for front-line emergency rescue treatment.

The invention provides a negative-pressure drainage device for cardiovascular medicine, and relates to the technical field of medical apparatuses and instruments. The negative-pressure drainage device for the cardiovascular medicine comprises a negative-pressure drainage instrument and a solution storage device, wherein a negative-pressure generating device is arranged on the side wall of the negative-pressure drainage instrument and comprises a pressing handle, a spring piece, a connecting rod and a piston; the piston moves in a piston cavity; the right end of the piston cavity is communicated with the negative-pressure drainage instrument through a first one-way valve; the left end of the piston cavity is a handle moving cavity and a boss is formed at the connecting part; the spring piece is arranged between the boss and the pressing handle; a negative-pressure sensor is arranged in the negative-pressure drainage instrument; the lower end of the negative-pressure drainage instrument is connected with a pipe head through a drainage pipe; a flow sensor is arranged on the drainage pipe; a display is arranged on the surface of the negative-pressure drainage instrument; the solution storage bottle is connected with a connecting end cover through a thread in a sealed way; the upper end of the negative-pressure drainage instrument is connected with a connecting end cover; the connecting end cover is connected with a negative-pressure source; and a solenoid valve is arranged on the negative-pressure pipe. According to the invention, the negative-pressure source can be communicated through negative pressure starting to provide continuous negative pressure, the negative pressure value and drainage amount can be automatically regulated and convenience in use is realized.

The invention discloses a heat supply pipeline heat preservation characteristic and hydrophobic monitoring and diagnosing system based on the Internet of Things, belongs to the crossing field of industrial Internet of Things and a centralized heat supply system, is mainly used for online monitoring, state overhaul and predictive maintenance of the centralized heat supply system, and can realize monitoring and analysis of the heat supply pipeline heat preservation characteristic and drainage amount. According to the equipment state and the analysis and diagnosis result, the aging degree of theheat preservation layer is judged, the hydrophobic water amount is calculated, and maintenance projects and condensate drainage work are actively arranged; and in combination with equipment state evaluation and reliability evaluation, the state of the equipment is judged, the future development trend of the equipment state is predicted, and personnel are assisted in making a scientific and reasonable overhaul and maintenance plan. According to the invention, more real evaluation and practice feasibility can be provided for intelligent, intelligent and safe operation of the heat supply system,more accurate maintenance suggestions are provided for on-site construction personnel, and a set of complete online monitoring, state maintenance and predictive maintenance strategy of the heat supplysystem is realized.

The invention belongs to an aerial oil drainage technology, and relates to an aerial emergency oil drainage control system and an aerial emergency oil drainage control method for an airplane. The control system comprises an aerial emergency oil drainage control board, a controller, a power distribution device and a controlled object. The control method comprises the following steps that: a manual mode and an automatic mode are switched and automatic oil drainage amount is preset by an oil drainage mode selection knob, and automatic control is invalid in the manual mode; oil drainage starting control method and principle are the same in the two modes, namely a control relay is locked to be switched on by a self-locking circuit when an oil drainage starting switch is turned on, and oil drainage is started; and oil drainage is stopped by an oil drainage stopping switch in the manual mode, and is automatically cut off by the controller according to the preset oil drainage amount in the automatic mode, and automatic oil drainage also can be overridden and interrupted by the oil drainage stopping switch. The aerial emergency oil drainage control system and the aerial emergency oil drainage control method are convenient, quick and reliable, the operating load of a unit is reduced, and system control reliability and the safety of the airplane are improved.

The invention discloses a middle-section water flow supercharging device for water pumps. The middle-section water flow supercharging device for the water pumps comprises a main hollow shell, and a main water inlet pipeline hole is formed in one side of the interior of the main hollow shell. According to the middle-section water flow supercharging device for the water pumps, two water suction pipelines can be connected, the combined effect like the two water pumps is realized through a main water pump and a motor, a water pumping mechanism driven by the motor can control water drainage pressure, accordingly, the water drainage amount in a drainage pipeline is maximized on the premise that the service life of the drainage pipeline is not affected, and the practicability is high; in addition, the supercharging device is provided with a drive component central transfer rotary mechanism, thereby achieving the torque transfer effect; and besides, the supercharging device is provided with amaximum torque control mechanism, through cooperation of the maximum torque control mechanism and the drive component central transfer rotary mechanism, when pressure caused by driving exceeds the maximum torque, the motor stops driving a turbine to pump water, so that the water drainage pressure does not exceeds the certain value, the characteristic of controllable output pressure is achieved, and the adaptability is high.

A hydraulic power steering apparatus assists in steering of a vehicle with a hydraulic cylinder. The hydraulic power steering apparatus includes a flow control valve, a steering torque sensor, a steering angle sensor, a vehicle speed sensor, and an ECU. The flow control valve changes the supply / drainage amount of hydraulic fluid for the hydraulic cylinder. The ECU sets a supply / drainage mode for supplying / draining the hydraulic fluid with respect to the hydraulic cylinder based on detection results from the aforementioned sensors and controls the flow control valve in accordance with the supply / drainage mode of the hydraulic fluid.

The invention discloses a heating working condition thermal performance calculation method of an extraction steam heating unit. The method solves the problem that an existing calculation method has certain limitations in applicable objects and working conditions. The number of regulation stages of a high-pressure cylinder of the extraction steam heating unit is defined to be eight, a heat consumption guarantee working condition (THA) heat balance diagram of the extraction steam heating unit is obtained, and the state of steam on the intersection position of the first stage and the first stage is determined; the state of steam on the intersection position of the first stage and the second stage is determined, and the state of steam on the intersection position of the third stage and the fourth stage and the state of steam on the intersection position of the fourth stage and the fifth stage are obtained; after steam-water flow distribution and stage of a whole machine are obtained, and the given main steam amount, heating extraction steam amount, steam-water loss rate, steam exhaust pressure, pollutant discharge rate, heat supply network heater drainage amount and thermal performance of a temperature lower unit can be calculated. By building a universal mathematic model, thermal performance of the unit under different heating working conditions can be calculated, and universality is high.