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65results about How to "Effective pressure control" patented technology
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Method, device and system for chamber pressure control
ActiveCN101727111AEffective pressure controlLow costSemiconductor/solid-state device manufacturingFluid pressure control with auxillary non-electric powerControl systemEngineering
The invention provides a chamber pressure control method, which comprises: step 100, acquiring air delivery target flow required when a chamber is in a target pressure according to a corresponding relationship between the pressure of the chamber and the air delivery flow; and step 200, setting the air delivery target flow as a flow setting value of a mass flow controller, wherein the mass flow controller implements air delivery operation on the chamber based on the flow setting value and controls the pressure of the chamber within the target pressure range. The method for controlling the pressure of the chamber also comprises a step of acquiring the corresponding relationship between the pressure of the chamber and the air delivery flow. In addition, the invention also provides a chamber pressure control device, a chamber pressure control system using the method and the chamber pressure control system using the device. An expensive pressure control valve is replaced by adopting the cheaper mass flow controller and the simple control step, and the cost of the process / equipment is saved while effectively controlling the pressure of the chamber.
Owner:BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
Flowability testing method and device for zirconium base block amorphous alloy melt
ActiveCN103143698ATemperature controlEffective pressure controlDirect flow property measurementAlumina ceramicMedium frequency
The invention relates to a flowability testing method and a device for a zirconium base block amorphous alloy melt. The method mainly comprises the steps that a medium-frequency induction vacuum melting furnace and an alumina ceramic crucible are adopted for alloy melting, the flowability testing device for the block amorphous alloy melt conducts suction casting on the molten block amorphous alloy melt under technological conditions of different temperatures, different pressures and different circular pipe diameters, block amorphous alloy cast rods in different flow lengths are obtained, and the flowability of an alloy can be known through the lengths of the amorphous alloy cast rods. According to the method and the device, the temperature of the block amorphous alloy melt and the pressure in a furnace body can be effectively controlled, the zirconium base block amorphous alloy cast rods in different diameters and different lengths can be subjected to suction casting simultaneously under the same technological condition, and the testing efficiency is high.
Owner:YANSHAN UNIV
Automatic water supplementing steam generating device
ActiveCN104482521AReduce manufacturing costReduce energy consumptionSteam generation heating methodsWater feed controlPotential riskEngineering
The invention discloses an automatic water supplementing steam generating device comprising a water tank assembly, a steam generator, a steam pot, a heating body and an anti-burning device. The water tank assembly is flexibly arranged above a water tank seat, the steam generator is fixedly arranged above the water tank seat, the heating body is arranged under the steam pot, the lower end of the water tank is provided with a water outlet valve, the water outlet valve is communicated with the lower end of the steam pot through a connecting pipe, and the connecting pipe is arranged in the water tank; the end of the connecting pipe connected with the water outlet valve is provided with a water inlet valve, the water inlet valve is mutually matched with the water outlet valve, the upper end of the steam pot is communicated with the inner upper end of the water tank of the water tank assembly through an air pressure balance pipe. By the application of the automatic water supplementing steam generating device, automatic water supplementing is achieved, water pumps are omitted, and cost is effectively decreased; by the arrangement of an automatic decompression device and an anti-dry burning temperature sensor, the performance of safety use is high, the pressure of steam outputting is adjustable and potential risk is eliminated effectively by the arranged anti-burning device.
Owner:伊立浦集团股份有限公司
Construction method of earth pressure balance shield tunneling machine muck pressure maintaining pumping device
The invention discloses a construction method of an earth pressure balance shield tunneling machine muck pressure maintaining pumping device. Before an earth pressure balance shield tunneling machine is tunneled into a stratum which is high in water permeating performance or high in requirement for sedimentation controlling, the soil outlet of the earth pressure balance shield tunneling machine is connected with a pressure maintaining pumping device body, bentonite or foam and others used for preventing gushing is added to a soil bin to carry out muck improvement in the pumping process, the pressure in the soil bin of the earth pressure balance shield tunneling machine can be effectively controlled by controlling the discharge capacity of the pumping device body, gushing or poor sedimentation controlling and other situations are avoided, the earth pressure balance shield tunneling machine can have the functions of an earth pressure shield and a slurry shield and is especially suitable for requirement of composite stratum construction, the requirement of stratum construction with different conditions can be met conveniently and quickly, and therefore the construction difficulty is greatly lowered, the construction cost is greatly reduced, and the construction safety is greatly improved.
Owner:CCCC SECOND HARBOR ENG
Parallel-tube snubbing pulverized coal discharging system for coal-bed gas well
The invention discloses a parallel-tube snubbing pulverized coal discharging system for a coal-bed gas well and belongs to the technical field of coal-bed gas well and oil-gas field development. The system comprises a ground portion and a down hole portion. The ground portion comprises a solid-liquid separation unit (12), a pump truck (1), a parallel-tube self-sealing unit (15), a parallel-tube well head unit (14), an air blower (2) and a coal-bed gas recovery unit (3). The down hole portion comprises a first oil tube (7), a second oil tube (18) and a parallel-tube hydraulic jet pulverized coal flushing unit (8). The ground portion is a control mechanism of the system, and the down hole portion is an execution mechanism of the system. The invention further discloses a parallel-tube snubbing pulverized coal discharging method for the coal-bed gas well, which uses the system. By means of the system, continuous pulverized coal discharging can be achieved, the current well repair efficiency is improved, and the stability of pressure of coal-bed gas in the well and the operation safety can be guaranteed during the operation.
Owner:PETROCHINA CO LTD +2
Tube push bench and recyclable construction method of main machine of tube push bench
ActiveCN111636885AAdaptableEffective control surface pressureUnderground chambersTunnel liningStructural engineeringMachine
The invention discloses a tube push bench and a recyclable construction method of a main machine of the tube push bench. The technical problems that an existing tube push bench cannot perform shield construction on an integrated sinking type pump house in a contact channel and the main machine is difficult to recycle are solved. The tube push bench comprises a shield, a host-driven cutter system is arranged in the shield, and a shield inner sleeve is detachably connected into the shield. The main machine is arranged in the shield inner sleeve, an outer edge tool is arranged at the outer edge of the cutter system, the outer edge tool is circumferentially and fixedly connected with the cutter system and axially downwards and one-way rotatably hinged to the cutter system, a rack is arranged outside the shield, and a pushing system matched with the shield is arranged at the top of the rack. The tube push bench is wide in application range, high in safety and high in construction efficiency.
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Pressure-driven multi-directional liquid conveying device
The invention discloses a pressure-driven multi-directional liquid conveying device. The pressure-driven multi-directional liquid conveying device comprises a body box with a bottom mounting substratemounted at the bottom. According to the device, under the action of a punching device or equipment with pressure from the upper portion, multiple pistons can move inside, piston movement is driven under the action of hydraulic oil, the advantage of avoiding consumption is achieved, and therefore the pressure utilization rate is increased; branch systems can carry out high pressure conveying synchronously, and conveying efficiency is high; the device is provided with a spiral spring compression resisting type maximum liquid pressure effective control mechanism, the inside maximum liquid pressure intensity can be effectively controlled through elastic force of a spiral spring, and therefore the phenomenon that components are damaged due to too large pressure intensity is avoided; and in addition, the device is provided with a spherical structure and size limiting type liquid one-way flow control mechanism, large hydraulic pressure is borne, and meanwhile liquid one-way flow control canbe achieved.
Owner:王晓刚
Elevating platform fire truck and control system of landing leg vertical oil cylinder of elevating platform fire truck
The invention provides an elevating platform fire truck and a control system of a landing leg vertical oil cylinder of the elevating platform fire truck. The elevating platform fire truck can relieve hydraulic vibration and abnormal noise produced in a high-pressure oil flow direction switching process. The control system comprises a control valve provided with an oil inlet and an oil return port, wherein the control valve is communicated with a rod cavity of the landing leg vertical oil cylinder through a first work oil port of the control valve, a second work oil port is communicated with a rodless cavity of the landing leg vertical oil cylinder, the control system further comprises a decompression oil line making the rodless cavity of the landing leg vertical oil cylinder be communicated with an oil box, the decompression oil line is provided with a throttling element and a decompression valve, and the decompression valve has two work positions used for enabling the decompression oil line to be communicated and disconnected. When landing legs need to be taken back, the decompression valve is controlled to be opened firstly, the decompression valve is in a communicated state, part of high-pressure oil in the rodless cavity can be discharged into the oil box through the throttling element, part of deformation of the oil cylinder caused by locking high pressure can be restored, pre-decompression of the oil cylinder is achieved, and the hydraulic vibration and the noise are avoided.
Owner:XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
Press of gun barrel air guide hoop
InactiveCN109352318AQuick assemblyFast clamping speedWork holdersMetal working apparatusEngineeringUltimate tensile strength
The invention discloses a press of a gun barrel air guide hoop, and belongs to the field of gun fixtures. The press comprises a control cabinet, a control panel, a power source, a support base, guiderails, a guide rail base, a power pressing assembly, a gun barrel back positioning assembly, an air guide hoop positioning assembly and a gun barrel front positioning tool; the support base is fixed on the ground; the guide rail base is erected on the support base; the guide rails are fixed on the left and right sides of the guide rail base in parallel; the gun barrel front positioning tool is mounted at the most front end of the guide rail base; and the air guide hoop positioning assembly, the gun barrel back positioning assembly and the power pressing assembly are mounted in the front-back direction of the guide rail base in sequence. The press is high in automation degree, uniform in power use, high in mounting precision and fast in mounting efficiency, prevents damage of gun barrels caused by excessive extrusion, guarantees the manufacturing quality of the gun barrels, saves both time and power, and reduces the labor intensity.
Owner:CHONGQING IND POLYTECHNIC COLLEGE
Thickened oil thermal recovery decompression method and device
ActiveCN103410487AEnsure safetyEffective pressure controlFluid removalSteam pressureHigh-pressure area
A thickened oil thermal recovery decompression method is suitable for thickened oil thermal recovery of mesohigh steam boilers and mesolow steam boilers, and a heat source for thermal recovery can supply steam through a decompression device. A decompression system of the thermal recovery decompression device is composed of a high-pressure area decompression valve and a medium-pressure area secondary decompression valve, and due to the two-stage decompression structure, the thickened oil thermal recovery decompression device is suitable for various work conditions of thickened oil thermal recovery. Mesohigh steam output pipes which are controlled by the valve and parallelly connected are arranged behind the high-pressure steam decompression valve, steam discharging pipelines for enabling steam of the mesohigh steam boilers to pass are arranged on the high-pressure steam decompression valve or the medium-pressure area secondary decompression valve, and the thickened oil thermal recovery decompression device can be steam driven or low-pressure steam driven or hot water driven. The thickened oil thermal recovery decompression device can monitor steam pressure in the steam pipelines at proper time, is convenient to operate, and can ensure safety of steam filling pipelines and steam utilization devices by arranging two check valves on steam inlet portions of the steam pipelines and placing a check valve on a steam discharging port portion.
Owner:JIANGSU WANXING PETROLEUM EQUIP
Integrated air conditioner and high-temperature refrigeration control method
InactiveCN104807112AReduce complaint rateAvoid normal workMechanical apparatusSpace heating and ventilation safety systemsControl systemEngineering
The invention provides an integrated air conditioner and a high-temperature refrigeration control method. The integrated air conditioner comprises an air conditioner main body and an air guiding plate, wherein the air guiding plate is arranged at an air inlet of an indoor heat exchanger of the air conditioner main body and is connected with the air conditioner main body, so that a controller of the air conditioner main body can be used for changing the volume of heat exchange of the air inlet of the indoor heat exchanger through changing the openness of the air guiding plate. According to the technical scheme of the invention, the volume of inlet air of the indoor heat exchanger is controlled through controlling the openness of the air guiding plate so as to control the volume of heat exchange of the indoor heat exchanger, thus, the pressure of a system is effectively controlled, the pressure of a high-pressure side of the system is controlled to be in an allowable pressure range of a compressor, the problems that the system cannot work normally due to the fact that the compressor is shutdown due to too high system heat exchange pressure and the compressor is damaged are avoided, and the user experience is improved.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
Device and method for hydraulically measuring concrete demoulding performance
ActiveCN108680434AEffective pressure controlScientific and reasonable structure designMaterial strength using tensile/compressive forcesUsing mechanical meansPneumatic pressureEquipment use
The invention discloses a device and a method for hydraulically measuring concrete demoulding performance. In an existing way of effectively and completely separating a test specimen from a concrete testing mould manually through an inflating pump, precise control and monitoring of air pressure change cannot be achieved, and equipment used for cooperating with the method is complicated and is highin cost. In the device, a first mounting cover and a second mounting cover are vertically arranged in parallel; a concrete mould is arranged between the first mounting cover and the second mounting cover; the two ends of the concrete mould are detachably connected with the first mounting cover and the second mounting cover; concrete is arranged inside the concrete mould; one end of a middle component runs through the first mounting cover and is communicated with the concrete in the concrete mould; the other end of the middle component is communicated with an oil outlet of a hydraulic pump through a connecting pipe. The device is reasonable in structural design, timely, accurate and effective in measurement result and convenient to operate. The method is convenient to operate and easy to control. The device and the method are used for measuring the concrete demoulding performance.
Owner:HARBIN INST OF TECH
Lubrication system for power end of high-power electrically-driven fracturing sled
InactiveCN112160904AEffective pressure controlStable pressurePositive displacement pump componentsLiquid fuel engine componentsTemperature controlOil can
The invention discloses a lubrication system for a power end of a high-power electrically-driven fracturing sled. The lubrication system mainly consists of an oil tank, an overflow valve, a suction assembly, an electromagnetic valve, a filter, a check valve, a temperature control valve, a safety valve, a heat radiator, a fracturing pump and the like. Multi-path parallel connection on lubricating oil can be carried out, so that a whole working procedure is synchronously completed, and the problems that the structural design of conventional single-machine single-pump is not reasonable as well asmodel selection and assembly of systematical elements are difficult under high-power working conditions can be solved; and by also utilizing overflow and heating, a heating effect under low-temperature working conditions is improved. The lubrication system for the power end disclosed by the invention has the advantages that the pressure, the discharge capacity and the temperature of the lubricating oil under the various working conditions can be effectively controlled, and the self reliability and the lubrication effect are greatly improved.
Owner:中油国家油气钻井装备工程技术研究中心有限公司 +2
One-way valve
InactiveCN103234066AEffective pressure controlCheck valvesEqualizing valvesEngineeringMechanical engineering
The invention discloses a one-way valve which comprises a valve body, a valve core, an adjusting knob and a spring and is characterized in that the valve body is provided with an inlet, an outlet and an unloading port which are communicated with the valve cavity respectively. The valve core is arranged in the valve cavity, the tail portion of the valve core is connected with the spring, the other end of the spring is connected with the adjusting knob, and the adjusting knob is connected with the valve body. The one-way valve is adjustable in opening pressure, has an overflowing effect and effectively controls pipeline pressure.
Owner:SUZHOU CUIZHI NEW TECH DEV
Negative pressure drainage system capable of achieving self-circulation
ActiveCN104815358APromote healingShorten treatment timeMedical devicesIntravenous devicesPeristaltic pumpEngineering
The invention discloses a negative pressure drainage system capable of achieving a self-circulation; the negative pressure drainage system can generate a continuous liquid shearing force in the position of a wound surface, so as to accelerate the union of the wound surface. The negative pressure drainage system comprises a medical dressing, a waste liquid bottle, a vacuum pump, an A liquid conduit, an A air conduit, a B liquid conduit, a peristaltic pump, a C liquid conduit, an infusion bottle, an E liquid conduit, an a control valve, a B control valve and an F control valve, wherein the medical dressing, the B liquid conduit, the peristaltic pump, the C liquid conduit and the infusion bottle are sequentially connected. The medical dressing, the A fluid conduit, the waste liquid bottle, the A air conduit and the vacuum pump are sequentially connected. The E liquid conduit is connected between the C liquid conduit and the A liquid conduit. The A control valve is installed on the A liquid conduit; and the connection point between the E liquid conduit and the A liquid conduit is located between the A control valve and the medical dressing. The B control valve is installed on the C liquid conduit; and the connection point between the E liquid conduit and the C liquid conduit is located between the B control valve and the peristaltic pump. The F control valve is installed on the E liquid conduit.
Owner:广州健福医疗科技有限公司
Fuel oil nozzle cyclone air flow test bench and test method thereof
PendingCN107560837AEffective control of precisionControl precisionMachine part testingEngine testingFuel oilEngineering
The invention belongs to the technical test field of an aerospace engine fuel oil injection system and especially relates to a fuel oil nozzle cyclone air flow test bench. The test bench comprises anexternal air source mechanism, a working chamber and an exhaust chamber, which are communicated in sequence through air pipes. The air pipe between the external air source mechanism and the working chamber is provided with a stop valve, an oil and gas separator, a regulating valve, a float flowmeter, a first-stage pressure fine-tuning assembly and a first pressure meter. The air pipe between the working chamber and the exhaust chamber is provided with a second-stage pressure fine-tuning assembly. The working chamber is provided with a second pressure meter. The first-stage pressure fine-tuningassembly comprises a first-stage regulating valve and a first-stage high-precision fine-tuning regulating valve, which are arranged in parallel. The second-stage pressure fine-tuning assembly comprises a second-stage regulating valve and a second-stage high-precision fine-tuning regulating valve, which are arranged in parallel. The invention also relates to a method for carrying out test throughthe test bench above.
Owner:TIANJIN CHENGLI AVIATION TECH CO LTD
Control method and device for rice milling chamber feeding and discharging
ActiveCN106311381AImprove work efficiencySafe and reliable workGrain treatmentsControl engineeringAgricultural engineering
The invention discloses a control method and device for rice milling chamber feeding and discharging. The control method includes the steps of (a) early-stage preparation, (b) traction rod position adjustment, (c) rice milling chamber feeding and discharging pre-commissioning, (d) rice milling chamber allocation adjustment, (e) rice milling chamber feeding and discharging regulation and control, and (f) hydraulic device working pressure adjustment. The device comprises a rice milling chamber and control mechanisms. A rice feeding movement valve is arranged at one end of the rice milling chamber, and a rice discharging movement valve is arranged at the other end of the rice milling chamber. Each control mechanism comprises a workbench, a hydraulic device and a traction mechanism. Each hydraulic device is provided with a pushing rod. Each traction mechanism comprises a traction base and a traction rod. The pushing rods are connected with the corresponding traction bases. By means of the control method and device, a feeding inlet meeting the size requirement of rice species and a discharging outlet meeting the size requirement of the rice species are started according to the categories of specific rice species, so that the sizes of the inlet and the outlet are effectively controlled, time and labor are saved, rice losses are reduced, and the head rice rate is increased. The control effect of the device is good, moreover, the control process can be completed only through two persons, and cost is reduced.
Owner:麦稻智慧粮食有限公司
A recyclable construction method for a pipe jacking machine and its main engine
ActiveCN111636885BAdaptableEffective control surface pressureUnderground chambersTunnel liningStructural engineeringMachine
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Large-diameter ultra-deep high-pressure jet grouting construction method
The invention discloses a large-diameter ultra-deep high-pressure jet grouting construction method. The construction method is characterized by comprising the following steps: adopting a hole guidingdrilling machine to guide a hole at a point to be grouted; after hole formation, lowering a drilling tool of a rotary jet machine to the bottom of the hole, wherein the lower end of the drilling toolis provided with a water cutting section and a spraying section, and the water cutting section is located on the upper portion of the spraying section; operating the rotary jet machine, lifting the drilling tool by rotating and enabling the water cutting section to spray high pressure water flow to the outside to cut a soil body surrounding the drilling tool into slurry, and the spraying section sprays cement slurry to the outside to form a rotary jet grouting pile around the drilling tool. The method has the advantages that the water cutting section is arranged to dilute the surrounding slurry, a reversing section is synchronously arranged, and a special slurry discharge pipe is utilized to conduct centralized slurry discharge. While slurry discharge is conducted efficiently, the internalpressure is effectively controlled, the grouting and pile formation quality is ensured, and the effect on the surrounding environment is small.
Owner:上海勇创环境岩土工程有限公司 +1
Cooking device
PendingCN113384135ASuitable for dischargeEffective pressure controlSteam cooking vesselsRoasters/grillsEngineeringControl valves
Owner:GREE ELECTRIC APPLIANCES INC
Control valve integrated with functions of pressure reducing, pressure maintaining and separating and application thereof
ActiveCN103982664AWith decompressionWith holding pressureOperating means/releasing devices for valvesEqualizing valvesEngineeringControl valves
Owner:上海成峰流体设备有限公司
Diaphragm safety valve cellular zinc air battery
InactiveCN106848493AQuick opening and closingStop rushing outFuel and primary cellsVent arrangementsRefluxBiochemical engineering
The invention discloses a diaphragm safety valve cellular zinc air battery which comprises a battery reaction tank, an air electrode outgoing line and a zinc electrode outgoing line, and is characterized in that the battery reaction tank is formed by performing permutation and combination on tubular reaction tank cells, wherein an upper liquid collection tank and a lower liquid collection tank which are mutually communicated with the tubular reaction tank cells are respectively arranged at the upper and lower ends of the tubular reaction tank cells; a liquid storage tank is arranged at the lower end of the lower liquid collection tank; a drain pipe is arranged at the tank bottom of the lower liquid collection tank; an electrically controlled drain valve is arranged at the orifice of the drain pipe; an electrolytic reflux pump liquid inlet is formed in one side of the bottom end of the liquid storage tank; a reflux pump liquid outlet is formed in one side of the upper liquid collection tank; a zinc electrode assembly and a battery cover plate are made into a whole; and a double-diaphragm safety valve is arranged on the battery cover plate. According to the zinc air battery disclosed by the invention, due to the unique air electrode and zinc electrode structure, the battery capacity is high, the zinc electrode is conveniently and rapidly replaced, the battery can be rapidly turned on or off, and the battery is safe to use, so that the zinc air battery can meet the requirement on vehicle power.
Owner:陈学琴
Downhole fracturing method
ActiveCN105986802AIncreased complexityEffective pressure controlFluid removalHydrocarbonEnvironmental geology
The invention provides a downhole fracturing method. The downhole fracturing method comprises the steps that a downhole sand-oil blender is put into a fractured interval through an oil tube to form an oil tube channel; propping agents are injected into the fractured interval through the oil tube channel, and quick water is injected into the fractured interval through an oil jacket annulus channel; and the displacement of high-sand-ratio sand-carrying fluid injected into the fractured interval through the oil tube channel and displacement of quick water injected into the fractured interval through the oil jacket annulus channel are controlled periodically, so that a propping agent bridge is formed in a crack of the fractured interval within a first preset time of one cycle, the propping agent bridge is released within a second preset time of one cycle, and one cycle is the sum of the first preset time and the second preset time. The pressure inside the crack is effectively controlled by periodically controlling the concentration of sand in the crack, the complexity of the crack is improved, the contact area of a hydrocarbon reservoir and the crack is increased, and then the yield is increased under the condition of not polluting the stratum.
Owner:PETROCHINA CO LTD
Honeycomb transport ship
ActiveCN110065589AImprove bending resistanceLarge section modulusHull interior subdivisionHull bulkheadsHoneycombHoneycomb like
The invention discloses a honeycomb transport ship. The honeycomb transport ship comprises a cargo hold area, the cargo hold area is internally provided with six cargo holds with the same cross-section shapes, the six cargo holds are circumferentially distributed and adjacent to each other in pairs, and the adjacent cargo holds are divided by main bulkheads; a water ballast tank is arranged between each cargo hold and the outer wall of the cargo hold area; auxiliary bulkheads for dividing inner cavities of the cargo holds into honeycomb shapes are arranged in the cargo holds, the auxiliary bulkheads divide the inner parts of the cargo holds into a plurality of cargo holes, the cargo holes extend longitudinally along the ship, and the cross sections of all the cargo holes are shaped like regular hexagons with the same size; the adjacent cargo holes are divided by the auxiliary bulkheads; the inner end parts of the six cargo holds form a pipe tunnel area in a sounding mode; and the crosssection of the cargo hold area is composed of the six cargo holds, the six water ballast tanks and the pipe lane area. According to the honeycomb transport ship, the structure is exquisite, and materials are saved; and the bulkhead plate structure has good self-bending resistance, large section modulus, and high longitudinal strength.
Owner:SHANGHAI MERCHANT SHIP DESIGN & RES INST
Integrated air conditioner and high temperature refrigeration control method
InactiveCN104807112BReduce complaint rateAvoid normal workMechanical apparatusSpace heating and ventilation safety systemsAir volumeControl system
Owner:GD MIDEA AIR CONDITIONING EQUIP CO LTD +1
A sensor capable of reducing errors and its measuring method
ActiveCN103076132BHigh measurement accuracyIncrease convective resistanceFluid pressure measurement by electric/magnetic elementsMeasurement precisionHeating power
The invention discloses a sensor capable of reducing error and a measuring method thereof. The sensor comprises a first base plate, a second base plate, a third base plate, a heating resistor, a through hole, a membrane of the first base plate, a cavity of the first base plate, a membrane of the second base plate and a cavity of the second base plate. The measuring method comprises the following steps: heating the cavity of the first base plate by electrifying the heating resistor, wherein the air in the cavity of the first base plate thermally expands to pressurize the membrane of the second base plate; reducing the heating power of the heating resistor; and measuring the pressure on the membrane of the second base plate. Through the above steps, the membrane on the second base plate can be maintained on an unloading line of a mechanical anhysteretic carve, so that the problem that the position of the membrane is uncertain can be avoided, the error caused by mechanical anhysteretic offset is suppressed, and the measurement precision of the pressure sensor is improved.
Owner:NANJING GAOHUA TECH
Pen pressure stimulation test device
PendingCN108398632ASet freeConvenient and effective testingElectronic circuit testingEngineeringStimulation tests
The invention discloses a pen pressure stimulation test device, which includes a bracket; a pen pressure module, which can be installed on the bracket and can move along the vertical direction to approach or leave the below moving platform, and the pen pressure module is configured to an accommodated test pen and specified pressure is produced by a pen point of the accommodated test pen on papersto be tested which are placed on the moving platform; the moving platform is installed on the bracket, the papers to be tested are placed and fixed on the moving platform, and the moving platform is configured to moving along the X direction and the Y direction of a horizontal plane under the driving of a motor; the motor is configured to driving the moving platform to move along the X direction and the Y direction of the horizontal plane; a control unit, which is configured to controlling operation of the motor to drive the moving platform to move along the X direction and the Y direction ofthe horizontal plane.
Owner:CHINA ELECTRONICS STANDARDIZATION INST +1
Hollow square-shaped adhesive pressing fixture
InactiveCN110205039AGuarantee stabilityEnsure accuracy andAdhesive processesEngineeringUltimate tensile strength
The invention discloses a hollow square-shaped adhesive pressing fixture. The fixture comprises a base, the base is provided with a support column, one end of the support column is fixedly connected with a support assembly, the support assembly is provided with an air cylinder and sliding support assemblies which are symmetrically distributed, a start switch controls the expansion and retraction of a movable member of the air cylinder, and the movable member of the air cylinder penetrates through a first through hole to be fixedly connected with a first connecting block; the lower portion of the first connecting block is fixedly connected with a pressing assembly, the pressing assembly comprises a pressing support plate, a pressing connecting plate is arranged under the pressing support plate, and a pressing plate is arranged under the pressing connecting plate. Through the contact extrusion between the pressing plate and hollow square-shaped adhesive tape, the stability and pressing precision of the bonding and pressing operation of the square-shaped adhesive tape are ensured, the subjective dependence on a worker is reduced, effective control over the pressing force is realized,and the demand for mass production can be met; the labor intensity of the worker is reduced, the work efficiency is improved, the product assembly yield is increased, and the economic loss of customerends and assembly plants is reduced.
Owner:博讯光电科技(合肥)有限公司
A device and method for hydraulically measuring the demoulding performance of concrete
ActiveCN108680434BEffective pressure controlScientific and reasonable structure designMaterial strength using tensile/compressive forcesUsing mechanical meansHydraulic pumpStructural engineering
A device and method for hydraulically measuring the release performance of concrete. Currently, the test block is effectively and completely separated from the concrete test mold by using an air pump manually, which cannot realize precise control and monitoring of air pressure changes. In addition, the equipment used in conjunction with the method is complicated and expensive. In the present invention, the first installation cover and the second installation cover are arranged vertically side by side, the concrete mold is arranged between the first installation cover and the second installation cover, and the two ends of the concrete mold are respectively connected to the first installation cover and the second installation cover. The cover is detachably connected, concrete is set in the concrete mold, one end of the middle piece is connected with the concrete in the concrete mold through the first installation cover, and the other end of the middle piece is connected with the oil outlet of the hydraulic pump through the connecting pipe. The invention has reasonable structural design, timely, accurate and effective measurement effect and convenient operation. The method in the present invention is convenient to operate and easy to control. The invention is used for measuring the release performance of concrete.
Owner:HARBIN INST OF TECH
Supercritical water oxidation industrial salt elimination method and system
PendingCN114262042AStable reaction pressureGuarantee continuous and stable operationDispersed particle filtrationWater contaminantsProcess engineeringEnvironmental engineering
The invention discloses a supercritical water oxidation industrial salt elimination method, which adopts double lock hoppers or multiple lock hoppers to charge and release pressure so as to realize a safe, stable and long-period continuous salt elimination method, and at present, a salt solution back pressure valve method is adopted to eliminate salt, and the salt elimination is discontinuous salt elimination. Compared with the prior art, the problems of pressure fluctuation, repeated pressurization and pressure relief and the like of the reactor possibly caused by back pressure valve salt discharge are solved; meanwhile, the problems that due to the fact that the salt solution back pressure valve is seriously abraded and blocked due to pressure relief and frequent replacement of the back pressure valve, model selection and stable operation of the back pressure valve are difficult all the time, stable operation of the device is directly affected, and particularly frequent replacement is difficult to achieve when radioactive materials are treated are solved.
Owner:湖南汉华京电清洁能源科技有限公司
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