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40results about How to "Increase cracking pressure" patented technology
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Gastric bypass prosthesis
InactiveUS20050256587A1Sufficient diametric rigidityIsolated contactSuture equipmentsIntravenous devicesPylorusProsthesis
A device (10) for treatment of obesity of a patient comprises an annular element (12) having a relatively large outer boundary and a relatively small inner boundary, and an elongated flexible tube (14) extending from the relatively small inner boundary of the annular element to a distal end. The relatively large outer boundary is adapted to be attached to an inner wall of a stomach (100) of a patient, such that the annular element divides the stomach (100) into two chambers, an esophagus-end chamber close to an esophagus of the patient, and a pylorus-end chamber close to a pylorus of the patient. The invention also provides a method for treatment of obesity of a patient which includes inserting an annular element having a relatively large outer boundary and a relatively small inner boundary into a stomach of the patient, and attaching the relatively large outer boundary of the annular element to an inner circumference of the stomach of the patient.
Owner:EGAN THOMAS +1
Gastric bypass prosthesis
InactiveUS7316716B2Limiting the amount of food intake of a patientReduce morbiditySuture equipmentsIntravenous devicesPylorusProsthesis
A device (10) for treatment of obesity of a patient comprises an annular element (12) having a relatively large outer boundary and a relatively small inner boundary, and an elongated flexible tube (14) extending from the relatively small inner boundary of the annular element to a distal end. The relatively large outer boundary is adapted to be attached to an inner wall of a stomach (100) of a patient, such that the annular element divides the stomach (100) into two chambers, an esophagus-end chamber close to an esophagus of the patient, and a pylorus-end chamber close to a pylorus of the patient. The invention also provides a method for treatment of obesity of a patient which includes inserting an annular element having a relatively large outer boundary and a relatively small inner boundary into a stomach of the patient, and attaching the relatively large outer boundary of the annular element to an inner circumference of the stomach of the patient.
Owner:EGAN THOMAS +1
Ventilation method and control of a ventilator based on same
InactiveUS7246618B2Prevents de-recruitmentLower Level RequirementsRespiratorsOperating means/releasing devices for valvesAirway pressuresIntensive care medicine
The invention provides an improved ventilation method and method for controlling a ventilator apparatus in accordance with same. More specifically, the present invention relates to a method of controlling a ventilator apparatus comprising the steps of placing a ventilator in a mode capable of adjusting airway pressure (P) and time (T), monitoring expiratory gas flow, analyzing the expiratory gas flow over time (T) to establish an expiratory gas flow pattern, and setting and / or adjusting a low time (T2) based on the expiratory gas flow pattern. Alternatively, the present invention relates to a method of controlling a ventilator apparatus comprising the steps of placing a ventilator in a mode capable of adjusting airway pressure (P) and time (T), and setting a low airway pressure (P2) of substantially zero cmH2O.
Owner:HABASHI NADER M
Infusion device with active and passive check valves
ActiveUS20070255261A1Avoid flowImprove energy efficiencyMedical devicesPharmaceutical delivery mechanismEngineeringCheck valve
An infusion system in which therapeutic substance from a reservoir is pumped by a bolus pump to an infusion port is disclosed. The therapeutic substance delivered by the bolus pump passes first through a passive check valve located downstream from the pump. The passive check valve opens in response to fluid pressure of the therapeutic substance. After passing through the passive check valve, the therapeutic substance passes through an active check valve located downstream from the passive check if the active check valve is actuated such that it is open. When not activated, the active check valve is closed and fluid flow through the active check valve in the downstream direction is prevented.
Owner:MEDTRONIC INC
Method for Preventing Shield Casing Catching Due to Too Large Frictional Resistance in Earth Pressure Balance Shield Machine
ActiveUS20140079485A1Avoid blocking distractionsConstruct may failElectric/magnetic detection for well-loggingUnderground chambersSignal onEngineering
A method for preventing shield jamming by excessive frictional resistance in earth pressure balance shield which involves real-time monitoring of earth pressure signal for earth pressure on the shield body through sensors on the shield machine. Combined with the known parameters, resistance in the shield machine is calculated. The friction F1 between the shield body and the stratum is calculated by CPU module in PLC according to the earth pressure signals on a real-time basis. Then the friction F1 is determined whether it is less than or equal to the difference between the quotient of dividing total propulsion force Ft by correction coefficient Kxz and total resistance of F2, F3, F4 and F5; if so, it is under normal propulsion; if not, the warning device alarms. Therefore forced shut down due to shield jamming is effectively avoided, the construction risk is reduced and the construction efficiency is improved.
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Disposable pump, a dispensing system comprising a pump and a method for dispensing liquid
ActiveUS20100320226A1RobustnessEasy to useOpening closed containersBottle/container closureEngineeringMechanical engineering
A disposable pump for a liquid dispensing system including a compressible container, includes—a housing forming a chamber and a dispensing opening wherein the pressure in the chamber may be varied for pumping liquid from the container to the chamber, and from the chamber to the dispensing opening, and a regulator fixedly arranged in the chamber for regulating a flow of liquid between the container and the chamber and between the chamber and the dispensing opening, the regulator including an outer valve for regulating the flow between the chamber and the dispensing opening. The pump may assume a closed position, in which a volume of liquid is drawn from the container to the chamber by a negative pressure created in the chamber, and a dispensing position, in which a volume of liquid is drawn from the chamber to the dispensing opening. The outer valve is displaceable between a symmetrical position corresponding to the closed position, where the outer valve is in sealing contact with the housing, and a tilted position corresponding to the dispensing position, where the outer valve is movable to and from sealing contact with the housing dependent on the pressure in the chamber, and the displacement of the outer valve from the symmetrical position to the tilted position requiring external force being applied to the pump and transferred to the regulator independent of the pressure variations in the chamber.
Owner:ESSITY HYGIENE & HEALTH AB
Device and method for detecting subsea valve in laboratory
InactiveCN101788370ACheck tightnessIncrease cracking pressureDetection of fluid at leakage pointEngineeringLaboratory facility
The invention discloses a device and a method for detecting a subsea valve in a laboratory. The device for detecting the subsea valve is connected with the subsea valve, and comprises an air source, an air source switch, an air source triplet, a three-position four-way manual valve, a water groove, a pressure reducing valve, a two-way manual valve, an air inlet pipeline, an air outlet pipeline, a bottom valve pressure test tool and a pressure test cover; a flange plate at the bending end of the subsea valve is connected with the bottom valve pressure test tool by a sealing pad, the centre of the bottom valve pressure test tool is connected with a first pressure inlet, a flange plate at the cylinder end of the subsea valve is connected with the pressure test cover by a bolt and the sealing pad, and the pressure test cover is connected with a second pressure inlet. The device can detect the tightness of the cylinder of the subsea valve, the tightness and the reverse tightness of the structure of the subsea valve, and has advantages of simple structure, convenient operation, easy observation, reasonable arrangement and convenient maintenance. The pressure reducing valve in the gas circuit can automatically adjust pressure in an air path, prevent the excessive opening pressure of the subsea valve and reduce the impact to the subsea valve.
Owner:BEIJING SANXING AUTOMOBILE
Disposable pump with suck-back mechanism
ActiveUS20100327019A1RobustnessEasy to useHolders and dispensersPortable flexible containersEngineeringValve opening
A disposable pump for a liquid dispensing system having a compressible container, includes a chamber in which the pressure may be varied for pumping liquid from the container to the chamber, and further from the chamber to a dispensing opening, the chamber enclosing an inner valve for regulating a flow of liquid between the container and the chamber, and an outer valve for regulating a flow of liquid between the chamber and the dispensing opening. The pump may assume a closed position, in which a volume of liquid is drawn from the container to the chamber by a negative pressure created in the chamber, and a dispensing position, in which a volume of liquid is drawn from the chamber to the dispensing opening. The inner valve is a one-way valve, which opens for a flow of liquid in the dispensing direction at an inner valve opening pressure acting in the dispensing direction, and closes for any pressure acting in an opposite direction. The outer valve is a two-way valve, which opens for a flow of liquid in the dispensing or opposite direction.
Owner:ESSITY HYGIENE & HEALTH AB
Fuel vapor treating apparatus
ActiveUS20130269532A1Reduce total pressure lossImprove sealingIsotope separationFuel supplyDiaphragm valveLiquid fuel
A fuel vapor treating apparatus includes a fuel tank having an inlet pipe and being configured to preserve liquid fuel therein, an adsorbent canister filled with an adsorbent capable of adsorbing fuel vapor, a fuel vapor path connecting the fuel tank to the adsorbent canister, a diaphragm valve having a back pressure chamber and being configured to open and close the fuel vapor path, a circulation path connecting the fuel tank to the inlet pipe for circulating fuel vapor from the fuel tank to the inlet pipe during refueling and being configured to be blocked when, the fuel tank is filled up, and a negative pressure generator connected to the circulation path and the back pressure chamber and configured to generate negative pressure by using a stream of the fuel vapor in the circulation path in order to cause the negative pressure to act on the back pressure chamber of the diaphragm valve.
Owner:AISAN IND CO LTD
Fuel vapor treating apparatus
ActiveUS8888901B2Reduce total pressure lossEase of refueling can be improvedNon-fuel substance addition to fuelLarge containersSorbentLiquid fuel
A fuel vapor treating apparatus includes a fuel tank having an inlet pipe and being configured to preserve liquid fuel therein, an adsorbent canister filled with an adsorbent capable of adsorbing fuel vapor, a fuel vapor path connecting the fuel tank to the adsorbent canister, a diaphragm valve having a back pressure chamber and being configured to open and close the fuel vapor path, a circulation path connecting the fuel tank to the inlet pipe for circulating fuel vapor from the fuel tank to the inlet pipe during refueling and being configured to be blocked when the fuel tank is filled up, and a negative pressure generator connected to the circulation path and the back pressure chamber and configured to generate negative pressure by using a stream of the fuel vapor in the circulation path in order to cause the negative pressure to act on the back pressure chamber of the diaphragm valve.
Owner:AISAN IND CO LTD
Disposable pump, a dispensing system comprising a pump and a method for dispensing liquid
ActiveUS8695856B2Easy to openIncrease cracking pressureHolders and dispensersPortable flexible containersEngineeringMechanical engineering
A disposable pump for a liquid dispensing system includes a compressible container and a housing forming a chamber and a dispensing opening wherein the pressure in the chamber may be varied for pumping liquid from the container to the chamber, and from the chamber to the dispensing opening. A regulator is fixedly arranged in the chamber for regulating a flow of liquid between the container and the chamber and between the chamber and the dispensing opening. The regulator includes an outer valve for regulating the flow between the chamber and the dispensing opening. The outer valve is displaceable between a symmetrical position corresponding to a closed position, where the outer valve is in sealing contact with the housing, and a tilted position corresponding to a dispensing position.
Owner:ESSITY HYGIENE & HEALTH AB
Method for operating an internal combustion engine
InactiveUS7497206B2High strengthIncrease cracking pressureElectrical controlFuel injection apparatusExternal combustion engineInternal combustion engine
Owner:ROBERT BOSCH GMBH
Quaternary system rotation rope coring device for balancing wave heave
The invention provides a quaternary system rotation rope coring device for balancing wave heave, which relates to the technical field of drilling. The quaternary system rotation rope coring device includes an outer pipe assembly, an inner pipe assembly arranged in the outer pipe assembly and a seat ring arranged on the inner wall of the outer pipe assembly. The inner pipe assembly includes a hanging mechanism, a wave heave balancing mechanism, an adjustment single action mechanism and a rock core pipe, which are successively connected from top to bottom; the wave heave balancing mechanism includes an alarm plug short connection piece, a hydraulic cylinder and a stopper, a piston assembly, a hollow piston rod and a water division joint, wherein the alarm plug short connection piece, the hydraulic cylinder and the stopper are successively connected from top to bottom, and the piston assembly, the hollow piston rod and the water division joint are successively connected from top to bottom; when the piston assembly reaches an upper extreme position, the water division joint contacts the stopper, and a plug body stretches into a slide valve water inlet channel; and when the piston assembly reaches a lower extreme position, the piston assembly contacts the stopper. The quaternary system rotation rope coring device can be applied to a drilling coring process, when the outer pipe assembly heaves with a ship, a tool bit tightly compresses a hole bottom all the time, and the situation that the rock core pipe heaves with the outer pipe assembly can be effectively avoided.
Owner:中石化石油工程技术服务有限公司 +1
Infusion device with active and passive check valves
ActiveUS8323267B2Avoid flowImprove energy efficiencyPharmaceutical delivery mechanismMedical devicesEngineeringCheck valve
An infusion system in which therapeutic substance from a reservoir is pumped by a bolus pump to an infusion port is disclosed. The therapeutic substance delivered by the bolus pump passes first through a passive check valve located downstream from the pump. The passive check valve opens in response to fluid pressure of the therapeutic substance. After passing through the passive check valve, the therapeutic substance passes through an active check valve located downstream from the passive check if the active check valve is actuated such that it is open. When not activated, the active check valve is closed and fluid flow through the active check valve in the downstream direction is prevented.
Owner:MEDTRONIC INC
Relay valve and electronic parking brake system based on same
PendingCN106882174AWork reliablyIncrease cracking pressureBraking action transmissionApplication and release valvesPistonAutomotive engineering
The invention discloses a relay valve and an electronic paring brake system based on the same. The relay valve comprises a shell, a control piston, a valve body, a valve return spring and a plate valve. A control port is arranged at the upper portion of the shell. An exhaust port is formed in the lower portion of the shell. An air inlet is formed in one side of the shell, an air outlet is formed in the other side of the shell, the shell comprises a control air source acting air cavity and a brake working air cavity, the control air source acting air cavity is communicated with the control port, the upper end of the valve body controls connection and disconnection of the air outlet and the exhaust port, the lower end of the valve controls connection and disconnection of the air inlet and the air outlet, the lower part of the piston is controlled to tightly abut against a piston return spring, and the lower portion of the valve abuts against the valve return spring; when the piston is controlled to be at the uppermost end, the air outlet and the exhaust port are communicated; when the piston return spring is pressed and moved downwards, the air outlet and the air inlet are communicated. The relay valve is simple in structure, reliable in working and low in cost, and the electronic parking brake system is safe and reliable.
Owner:NANJING UNIV OF SCI & TECH
Electromagnetic coil structure for electromagnetic valve
ActiveCN113611478AReduce volumeGreat suctionOperating means/releasing devices for valvesTransformers/inductances casingsEngineeringMechanical engineering
The invention provides an electromagnetic coil structure for an electromagnetic valve. The electromagnetic coil structure comprises a coil winding and an integrated coil framework, wherein a winding part is arranged on the coil framework, an insulating layer is sprayed on an inner wall of the winding part, the coil winding is wound on the winding part, the insulating layer is used for keeping the coil winding and the coil framework insulated; a magnetic conductive shell is installed on the outer side of the coil winding, a leading-out wire is arranged on the outer side of the magnetic conductive shell, and the leading-out wire penetrates through the magnetic conductive shell to be electrically connected with the coil winding. According to the electromagnetic coil structure for the electromagnetic valve, defects that an existing electromagnetic coil is complex in structure, large in size, unstable in magnetic field force and weak in electromagnetic force are overcome.
Owner:YUYAO SANLIXIN SOLENOID VALVE CO LTD
Liquid-controlled non-return valve
InactiveCN101435445AWide applicabilitySmall pressure dropServomotor componentsEngineeringScrew thread
The invention discloses a hydraulic control one way valve and relates to a hydraulic control valve. The hydraulic control one way valve is characterized in that the middle of the hydraulic control one way valve is provided with a main hole; the underside is provided with an oil inlet hole A and an oil outlet hole B; free flow can be formed between the hole A and the hole B; and a hydraulic control port X and an oil drain port Y are also arranged on a valve body. Two sides of the valve body are closed by an end cover and a valve cover; and pressure oil between the end cover and the valve body and between the valve cover and the valve body is kept unleaked outside through a sealing ring and a retaining ring. The inside of the valve body is manufactured with two main flow passage holes by a foundry method in order that the hole A and the hole B are communicated with the main hole respectively. The hydraulic control one way valve has the advantages that the hydraulic control one way valve is optimized and is added with opening pressure in order that the valve has wider application; a right end cover adopts screw thread connection so as to simplify a structure; the structure can increase the oil control cubage and greatly increase oil through amount; and the pre-opening function of the valve can effectively reduce impact vibration and improve the smoothness of motion so as to increase the service life of the valve.
Owner:SHANGHAI LIXIN HYDRAULIC
Method for preventing shield casing jamming due to too large frictional resistance in earth pressure balance shield machine
ActiveUS9016983B2Avoid blocking distractionsIncrease pressureArtificial islandsUnderground chambersSignal onEngineering
A method for preventing shield jamming by excessive frictional resistance in earth pressure balance shield which involves real-time monitoring of earth pressure signal for earth pressure on the shield body through sensors on the shield machine. Combined with the known parameters, resistance in the shield machine is calculated. The friction F1 between the shield body and the stratum is calculated by CPU module in PLC according to the earth pressure signals on a real-time basis. Then the friction F1 is determined whether it is less than or equal to the difference between the quotient of dividing total propulsion force Ft by correction coefficient Kxz and total resistance of F2, F3, F4 and F5; if so, it is under normal propulsion; if not, the warning device alarms.
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
System for hydrogen charging
ActiveUS8714183B2Uniform chargeIncrease resistanceVessel mounting detailsVessel geometry/arrangement/sizeHeat fluxEngineering
A system for hydrogen charging has an orifice provided as a flow restrictor between a hydrogen charging port and a hydrogen tank having a larger heat flux value. No orifice is provided on the side of a hydrogen tank having a smaller heat flux value. The orifice has a function of increasing the channel resistance. With the above, it is possible to initially have the hydrogen tank having a smaller heat flux value in the fully charged state, and thereafter the hydrogen tank having a larger heat flux value in the fully charged state. Alternatively, a check valve having a cracking pressure ΔP2 can be provided as a flow restrictor on the side of the hydrogen tank having larger heat flux, and a check valve having a cracking pressure ΔP1 can be provided as a flow restrictor on the side of the hydrogen tank having smaller heat flux, wherein ΔP2>ΔP1.
Owner:TOYOTA JIDOSHA KK
Hydraulic type brake apparatus
InactiveUS6871494B2Increase braking powerDegree of reductionBraking element arrangementsFluid couplingsHydraulic circuitEngineering
The present invention relates to a hydraulic type brake system which includes a unit for adjusting a back pressure in a turn driving hydraulic circuit mounted in a construction heavy equipment such as an excavator, etc., and in particular to a hydraulic type brake apparatus which is used together with a relief valve installed various actuator driving hydraulic circuits for adjusting a back pressure in a lower flow side of a relief valve for thereby adjusting an opening pressure of a relief valve. There is provided a back pressure adjusting unit adapted to adjust an opening pressure of the relief valve by adjusting a back pressure of the hydraulic circuit in a lower flow portion of the relief valve based on a co-operation with the actuator.
Owner:VOLVO CONSTR EQUIP
Variable pressure adjustable rock mass fracture permeability testing device
InactiveCN108444889AAvoid windingReduce the number of pipesPermeability/surface area analysisWater sourceDevice form
The invention belongs to the technical field of measuring of the permeability of a rock mass, and discloses a variable pressure adjustable rock mass fracture permeability testing device. The variablepressure adjustable rock mass fracture permeability testing device comprises plugging devices, a converter, a communicating pipe, a drilling machine, a drill pipe and a control operation platform. Theconverter is in threaded connection to the tail part of the front plugging device and internally comprises an inner ring, a spring and a cross-shaped screw sleeve, the compression degree of the spring is changed by regulating the cross-shaped screw sleeve, and the starting pressure of the inner ring is further controlled; the front plugging device and the tail plugging device form a water injection cavity with a drilling hole after being expanded, and the external high pressure water enters the water injection cavity through the converter to detect the fracture permeability of the drilling hole. The testing device simplifies the external operation system and the operation step, the number of pipelines in the drilling hole is reduced to one, the problem of wire winding of the drill pipe isavoided, the stability of the measurement process is improved, the plugging process and the measuring process respectively work at the respective pressures by using a same water source, and the variable pressure of the converter is adjusted to adapt to different working environments and the starting pressure requirements.
Owner:DALIAN UNIV OF TECH
Drilling single-circuit pressure water control system based on detection of water-conducting fracture zone in overlying rock
InactiveCN108643898BAvoid windingReduce the number of pipesBorehole/well accessoriesWater sourceWater storage tank
The invention belongs to the technical field of rock mass mining fracture permeability determination, and discloses a borehole single loop pressurized-water control system based on overlying strata diversion fissure zone detection. The borehole single loop pressurized-water control system comprises a plugging test system, a propelling system and a supply control system. The plugging test system comprises a plugging device, a communicating pipe and a transverter, and a water injecting cavity is formed by the plugging device and a drill hole. The transverter is located on the tail portions of afront portion plugging device and a middle portion plugging device, and is internally provided with an inner ring, a spring, a cross wire sleeve, a water storage tank and a water diversion hole, the inner ring is provided with a water passing hole and communicates with the water storage tank, a externally-connected water source is transported to the water-injection cavity through the water diversion hole, and the permeability of the borehole fracture is detected. The borehole single loop pressurized-water control system based on the overlying strata diversion fissure zone detection can use thesame water source to realize the plugging and observation process under the respective pressure, pipes in a borehole is reduced to one, the problem of the drill pipe winding is avoided, the stabilityof the observation process is improved, the observation water pressure can be adjusted according to the need, the measurement process of propelling multiple stages at one time can be realized at thesame time, and the observation efficiency is improved.
Owner:DALIAN UNIV OF TECH
Oil stopping electromagnetic valve
PendingCN107339490AEffective control switchControl switchOperating means/releasing devices for valvesLift valveDriving currentElectric current flow
The invention relates to an electromagnetic valve, in particular an oil stopping electromagnetic valve, and belongs to the technical field of electromagnetic valves. The electromagnetic valve comprises a block, a shell, a sealing seat, an armature, a coil component, a sheath, a cover plate, a spring and an iron core, wherein oil holes in the sealing seat are connected with an oil inlet channel and an oil outlet channel respectively, the lower end of the armature is connected with a gland, and the lower end of the gland is in contact with the oil holes of the sealing seat; the inner back part of the armature is provided with the spring, the upper end of the spring is provided with the iron core, and the upper and lower ends of the spring are in compressed contact with the iron core and the armature. The electromagnetic valve has a simple, compact and reasonable structure, can effectively control the switch of an oil circuit, and has a good sealing performance and a small current; the iron core is matched with the armature through conical surfaces, which increases the opening pressure and can reduce the required drive current.
Owner:WUXI WEIFU HIGH TECH CO LTD
Fuel-injection valve for internal combustion engines
InactiveUS20030164404A1Increase fuel pressureReduce pollutant emissionsFuel injection apparatusMachines/enginesCombustion chamberEngineering
A fuel injection valve with a valve member (10), which cooperates with a valve seat (16) to control injection openings (20). The valve member (10) is guided, in a portion remote from the combustion chamber, in a bore (7) and is surrounded by a pressure chamber (12), which can be filled with fuel at high pressure. The valve member (10) is urged by a spring (27) disposed in a spring chamber (25) and having a closing force in the direction of the valve seat (16), and in an appropriate opening pressure in the pressure chamber (12), as a result of the hydraulic pressure on a pressure shoulder (11), embodied on the valve member (10), the valve member lifts from the valve seat (10) and thus opens the injection openings; the injection of the fuel is effected separately in a main injection and a subsequent postinjection. The pressure chamber (12) and the spring chamber (25) communicate via a throttle connection, so that the pressure in the otherwise closed-off spring chamber (25) rises during the main injection and via the additional hydraulic force on the valve member (10) raises the opening pressure of the postinjection; the pressure in the spring chamber (25) has reached the initial value again by the onset of the next injection cycle (FIG. 1).
Owner:ROBERT BOSCH GMBH
Split type oil spray nozzle of diesel engine
InactiveCN104153927AEasy to maintainReduce work inertiaFuel injection apparatusMachines/enginesSpray nozzleNeedle valve
The invention provides a split type oil spray nozzle of a diesel engine, and relates to the field of diesel engine components. The split type oil spray nozzle of the diesel engine comprises a valve body and a needle valve arranged in the valve body and is characterized in that the valve body comprises a transition body and an oil nozzle, the center at the right end of the transition body is provided with a clamping groove, and one end of the oil nozzle is arranged in the clamping groove in the right end of the transition body in a clamped mode. The split type oil spray nozzle of the diesel engine is convenient to maintain, work inertia of the oil spray nozzle is reduced, motion impact force is reduced, the spray opening pressure is increased, diesel fuel atomization is made to be fine and even, burning is conducted evenly in an air cylinder, emission is lowered, the fuel efficiency is improved, and the use efficiency of a product is improved.
Owner:YANGZHOU HONGTU MACHINERY MFG
A hydraulic excavator stick regeneration device and hydraulic excavator
ActiveCN108104183BReduce consumptionIncrease cracking pressureMechanical machines/dredgersHydraulic cylinderExcavator
The invention discloses a hydraulic excavator and a bucket rod regenerating device thereof. A rod cavity and a rodless cavity of a hydraulic cylinder are connected with a multi-way valve; the rod cavity passes through the multi-way valve to further connect with a regeneration relief valve and a regeneration check valve; on and off of the regeneration relief valve determine capacity of hydraulic oil returning from the rod cavity to an oil tank, and the regeneration check valve is opened to provide regeneration hydraulic oil for the rodless cavity after hydraulic oil pressure reaches an openingset pressure; an oil inlet of a plunger pump is positioned in the oil tank, hydraulic oil is pumped from the oil tank to be outputted to the multi-way valve, and the multi-way valve and the regeneration check valve jointly provide appropriate hydraulic oil for the rodless cavity. In bucket rod recovery, a load drives a bucket rod piston rod to fall down, then the rod cavity outputs hydraulic oil to the multi-way valve, and the hydraulic oil passing through the multi-way valve is distributed to the rodless cavity and the oil tank through the regeneration check valve and the regeneration reliefvalve jointly. Emptying of the rodless cavity of the hydraulic cylinder can be prevented, hydraulic oil regeneration is realized, and integral fuel consumption of the excavator is reduced.
Owner:WEICHAI POWER CO LTD +1
Liquid-controlled non-return valve
Owner:SHANGHAI LIXIN HYDRAULIC
An electromagnetic coil structure for an electromagnetic valve
ActiveCN113611478BReduce volumeGreat suctionOperating means/releasing devices for valvesTransformers/inductances casingsSolenoid valveWire wrap
The invention provides an electromagnetic coil structure for an electromagnetic valve, which includes a coil winding and an integrated coil frame. The coil frame is provided with a winding part, and an insulating layer is sprayed on the inner wall of the winding part. The coil winding is wound on the winding portion, and the insulating layer is used to keep the coil winding insulated from the coil frame; a magnetically permeable housing is installed on the outside of the coil winding, and the magnetically permeable housing A lead-out wire is provided on the outer side of the coil, and the lead-out wire is electrically connected to the coil winding through the magnetically permeable housing. The electromagnetic coil structure used in the electromagnetic valve provided by the invention overcomes the defects of complex structure, large volume, unstable magnetic field force and weak electromagnetic force of the existing electromagnetic coil.
Owner:YUYAO SANLIXIN SOLENOID VALVE CO LTD
Variable pressure adjustable rock mass fracture permeability testing device
InactiveCN108444889BAvoid windingReduce the number of pipesPermeability/surface area analysisConvertersWater source
The invention belongs to the technical field of measuring of the permeability of a rock mass, and discloses a variable pressure adjustable rock mass fracture permeability testing device. The variablepressure adjustable rock mass fracture permeability testing device comprises plugging devices, a converter, a communicating pipe, a drilling machine, a drill pipe and a control operation platform. Theconverter is in threaded connection to the tail part of the front plugging device and internally comprises an inner ring, a spring and a cross-shaped screw sleeve, the compression degree of the spring is changed by regulating the cross-shaped screw sleeve, and the starting pressure of the inner ring is further controlled; the front plugging device and the tail plugging device form a water injection cavity with a drilling hole after being expanded, and the external high pressure water enters the water injection cavity through the converter to detect the fracture permeability of the drilling hole. The testing device simplifies the external operation system and the operation step, the number of pipelines in the drilling hole is reduced to one, the problem of wire winding of the drill pipe isavoided, the stability of the measurement process is improved, the plugging process and the measuring process respectively work at the respective pressures by using a same water source, and the variable pressure of the converter is adjusted to adapt to different working environments and the starting pressure requirements.
Owner:DALIAN UNIV OF TECH
A piezoelectric micropump
ActiveCN110966167BImprove output performanceSimple structurePositive displacement pump componentsFlexible member pumpsSuction forceMicropump
The invention protects a piezoelectric micropump, which includes a piezoelectric vibrator, a magnetic composite microvalve and a pump body. The magnetic composite microvalve includes a magnetic composite diaphragm and a support beam. The magnetic composite diaphragm consists of a polymer material layer on the surface, The flexible material layer of the bottom layer and the magnetic material layer of the middle layer are compounded, and the magnetic composite microvalve is respectively supported by the support beam and located above the pump inlet and the pump outlet of the pump body; magnetic suction is set on the pump inlet and the pump outlet. The inlet and outlet are closed by the suction force of the magnetic suction ring and the magnetic composite microvalve. The invention adopts a multi-layer magnetic composite microvalve, which can improve the airtightness of the micropump, prevent reverse leakage and increase the output pressure of the micropump.
Owner:CHONGQING UNIV
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