Milk expressing device capable of simulating a baby's suckling,Test device for simulating ecological rock mechanical slope protection under rainfall precipitation condition,Interior-mountable pressure relief valve,Large diameter valve high temperature sealing test device,Fuel delivery system with partial pressure relief valve on the drive line of a suction jet pump

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12 results about "Relief valve" patented technology

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A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; pressure might otherwise build up and create a process upset, instrument or equipment failure, or fire. The pressure is relieved by allowing the pressurised fluid to flow from an auxiliary passage out of the system. The relief valve is designed or set to open at a predetermined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits. When the set pressure is exceeded, the relief valve becomes the "path of least resistance" as the valve is forced open and a portion of the fluid is diverted through the auxiliary route. The diverted fluid (liquid, gas or liquid–gas mixture) is usually routed through a piping system known as a flare header or relief header to a central, elevated gas flare where it is usually burned and the resulting combustion gases are released to the atmosphere. As the fluid is diverted, the pressure inside the vessel will stop rising. Once it reaches the valve's reseating pressure, the valve will close. The blowdown is usually stated as a percentage of set pressure and refers to how much the pressure needs to drop before the valve reseats. The blowdown can vary from roughly 2–20%, and some valves have adjustable blowdowns.

Milk expressing device capable of simulating a baby's suckling

InactiveUS20140031744A1Improve efficiencyImprove comfortMilking pumpMedical devicesEngineeringControl circuit

A milk expressing device capable of simulating a baby's suckling includes first and second vacuum sources, a throttle hole, a solenoid relief valve, first and second tubes, a breast shield, and a control circuit board. The first tube connecting the first vacuum source and the breast shield is provided with the throttle hole to communicate with the atmosphere. When the first vacuum source is turned off, negative pressure in the first tube and the breast shield disappears slowly through the throttle hole. The second tube connecting the second vacuum source and the breast shield is provided with the solenoid relief valve to communicate with the atmosphere. When the solenoid relief valve is activated, negative pressure in the second tube and in the breast shield is rapidly removed. The control circuit board controls the first and second vacuum sources and the solenoid relief valve.

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Owner:CHEN CHEAN SHUI

Test device for simulating ecological rock mechanical slope protection under rainfall precipitation condition

InactiveCN101216479ASimple structureAdjustable rainfall intensityFoundation testingEarth material testingFixed bearingSoil science

The invention relates to a device for testing ecological slope protection of ecologic rock and soil mechanics under simulated rainfall condition, which is mainly used for studying scouring (or erosion) characteristics test of rock and soil slope by artificial rainfall and belongs to the field of geotechnical engineering and environmental engineering. The test device comprises an automatic variable slope test rack, a test soil bin and a rainfall simulator with adjustable rain intensity, wherein a rotary support is composed of a guide rail, a crank, a crank brake, an upper shaft and a device for preventing backward sliding; a fixed bearing support is composed of a lower shaft, a bearing seat, a bending guide groove, a capstan and a lower shaft caging device; the rainfall simulator with adjustable rain intensity is disposed on the variable slope test race through a support and includes a rainfall simulator, a pressure sensor, a vibrator, a barometer, a relief valve, etc. The inventive test device has the advantages of simple structure, adjustable rain intensity, uniform rainfall, automatic online collection of air pressure, water pressure and rainfall amount of the rainfall simulator and reduced time and labor force for loading the test soil bin.

Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Interior-mountable pressure relief valve

InactiveUS20090169693A1Avoid pollutionBagsCheck valvesFilter mediaMembrane configuration

An interior-mountable pressure relief valve for packages containing food products such as coffee that normally tend to out-gas. The relief valve of the present invention can be made by thermoforming a pocket of a barrier type of semi-rigid film that has a heat seal membrane on one side. An indent can be made in the bottom of this pocket to receive a filter medium that covers an aperture in the bottom of the pocket. The filter medium can be heat-staked to the pocket. A pressure relief valve known in the art containing a base layer, a pair of rails and a flexible membrane can be placed in the pocket. This valve and pocket assembly can be can be treated with a mesh membrane that is heat sealable to the seal side to prevent disassembly or contamination. The product can then be wound on a level wound spool for shipping to an end user. The end user can take the carrier tape and dispense it into a single piece dose and then heat seal the carrier to the inside wall of the package.

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Owner:PLITEK

Large diameter valve high temperature sealing test device

ActiveCN105758596AMeasurement of fluid loss/gain rateElectric heatingRelief valve

The invention discloses a large diameter valve high temperature sealing test device. A gas storage tank is connected with an air compression station or an air compression pump through a first cut-off valve. A gas outlet end of the gas storage tank is connected with a surge tank in an electric heating room. A pressure test plate is disposed behind the surge tank. A valve under test is installed between the surge tank and the pressure test plate, and the surge tank, the pressure test plate and the valve under test are connected to form a cavity. The upper, lower, left, right, front and rear sides of the interior of the electric heating room are provided with electric heaters respectively. A second cut-off valve and a regulating valve are disposed on a gap pipe, and the second cut-off valve is located at the front of the regulating valve. A first security valve, a first pressure sensor and a first temperature sensor are disposed on the gas storage tank. A second security valve, a second pressure sensor and a second temperature sensor are disposed on the surge tank. A relief valve is disposed on the pressure test plate. The valve under test is connected with a drive device driving the valve under test to open and close. The invention is reasonable in structure, and can improve the working reliability of the valve.

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Owner:JIANGSU SHENTONG VALVE

Fuel delivery system with partial pressure relief valve on the drive line of a suction jet pump

InactiveUS20160138537A1Relieve pressureMachines/enginesLiquid fuel feedersRelief valveInjection pump

A fuel delivery system (1) and a corresponding production method for producing a fuel delivery system (1) are proposed. The fuel delivery system (1) has a fuel filter (3) which purifies a fuel (9) delivered from an accumulator pot (5) to an internal combustion engine (7). Furthermore, the fuel delivery system (1) has a suction jet pump (15) for filling the accumulator pot (5) with fuel (9) from a fuel tank (11). A drive line (17) connects the suction jet pump (15) to the fuel filter (3). In this case, there is provided on the drive line (17) a first pressure valve (19) which opens in the direction of the suction jet pump (15) when a pressure on the fuel filter side exceeds a first threshold value.

Fuel delivery system with partial pressure relief valve on the drive line of a suction jet pump

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Owner:ROBERT BOSCH GMBH

Vehicle noise reducing assembly

ActiveUS20160280155A1Reduce noiseAvoid soundSuperstructure subunitsTrunk structureEngineering

A vehicle noise reducing assembly includes a trunk structure having a floor panel, an interior wall panel and an exterior wall panel. A trunk storage area is defined by the interior wall panel and the floor panel. A trim panel is connected to the interior wall panel within the trunk storage area. A cavity is defined by the floor panel, the exterior wall panel and the trim panel and has a first cavity and a second cavity. A relief valve is disposed in a vent opening in the exterior wall panel. The relief valve extends into the first cavity and has a drafter opening facing inboard. A barrier member is disposed in the second cavity with a barrier surface positioned between the relief valve and the second cavity to prevent sound passing through the drafter opening from entering the second cavity.

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Owner:NISSAN MOTOR CO LTD

Visualized test bench for testing hydraulic valve performance

ActiveCN110259765AFluid-pressure actuator testingRelief valveEngineering

The invention relates to a visualized test bench for testing hydraulic valve performance, relating to the field of hydraulic valve performance testing devices, and aiming at solving the problems that the condition of runner flow field of a valve cannot be effectively known, and the experimental valve pressure flow condition is uncontrollable during the experimental process when the test bench in the prior art is used. The visualized test bench for testing hydraulic valve performance comprises a fuel tank, a hydraulic pump No. 1, a pressure gauge, a speed regulating valve, a pilot-type constant pressure reducing valve, a pressure sensor No. 1, a visualized experimental valve, a pressure sensor No. 2, a pilot type relief valve, a flow sensor, a temperature sensor, an electromagnetic reversing valve, a cooler, a hydraulic pump No. 2 and a heater. The visualized test bench is mainly used for the hydraulic valve performance testing process, and an operator can conveniently observe the condition of the runner flow field when the valve is working.

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Owner:HARBIN INST OF TECH

Sealing structure of reciprocating plunger pump

InactiveUS20190017603A1Reduce loadExtended service lifeEngine sealsPositive displacement pump componentsPlunger pumpRelief valve

A sealing structure of a reciprocating plunger pump comprises a pump seat, a pressure relief valve assembly, a pressure regulating valve assembly, and a plunger rod assembly; the plunger rod assembly includes a plunger rod, a large sealing ring and a small sealing ring; the structure of the large sealing ring is the same as that of the small sealing ring, and the large sealing ring includes a ring-shaped sealing body, an annular recess, and an annular tension spring; the annular tension spring always has an outwardly expanding force on both side walls of the annular recess; the sealing body includes a saw-tooth sealing groove. The sealing structure reduce the load on the pump and improve the service life of the sealing ring.

Sealing structure of reciprocating plunger pump

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Owner:ZHEJIANG RONGPENG AIR TOOLS

Double-oil-inlet type hydraulic integrated valve group and double-oil-pump type hydraulic station for large filter press

PendingCN114412870APressurize fastPressurization simplifiedFluid-pressure actuator testingServomotor componentsFilter pressOil pump

According to the double-oil-inlet type hydraulic pile-up valve group and the double-oil-pump type hydraulic station for the large filter press, the key points of the innovative scheme are that the hydraulic pile-up valve group comprises a hydraulic pile-up valve, an electro-hydraulic directional control valve, a hydraulic control one-way valve and an electromagnetic relief valve; the double-oil-inlet hydraulic pile-up valve is mainly characterized in that an existing single-oil-inlet hydraulic pile-up valve is improved into a double-oil-inlet hydraulic pile-up valve, so that double large electric oil pump sets and the hydraulic pile-up valve can be directly connected through double hydraulic oil pipes, and a three-way connector is omitted; the functions of hydraulic oil reversing, overflow pressure stabilizing and non-return pressure maintaining are achieved. The double-oil-pump type hydraulic station uses the hydraulic pile-up valve group, and solves the problems that a single-oil-inlet type hydraulic pile-up valve needs to be indirectly connected with a double-large electric oil pump group and the hydraulic pile-up valve by means of a three-way joint, the structure is complex, the number of oil pipe joints is large, the failure rate is high, and certain pressure loss exists after hydraulic oil is converged through the three-way joint; an oil inlet hole of the hydraulic pile-up valve is close to an oil tank cover, the installation space is limited, and the three-way connector is difficult to install and detach.

Owner:JINGJIN ENVIRONMENTAL PROTECTION INC

High pressure gas-liquid grinding device

InactiveCN109015392ABreak through the problem that the grinding accuracy is limited by abrasive particlesSmall particle sizeAbrasive machine appurtenancesInlet valveElectric machinery

The invention discloses a high pressure gas-liquid grinding device comprising a horizontal working table, a first motor vertically fixed below the horizontal working table, a high pressure closed cabin arranged at the upper part of the horizontal working table, and a workpiece mounting table arranged in the high pressure closed cabin. A rotating shaft of the first motor penetrates through the horizontal working table vertically upwards, and is fixedly connected to the workpiece mounting table, and the high pressure closed cabin is provided with a one-way inlet valve and a pressure relief valve; and the side of the high pressure closed cabin is further provided with a cabin door. According to the high pressure gas-liquid grinding device, through arrangement of a workpiece in high pressure gas or liquid environment, when the workpiece is driven by the first motor to rotate, the purpose of grinding the surface of the workpiece is achieved through friction between the surface of the workpiece and the high pressure gas or liquid environment; since grinding media are gas molecules or liquid molecules, the particle size of the grinding media is reduced greatly; thus, the problem that thegrinding accuracy of an existing grinding device is limited by abrasive particles is solved, and the grinding accuracy of the workpiece can be improved greatly.

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Owner:CHONGQING CHENSHI CLEANING SERVICE CO LTD

Steering system, azimuthing propulsion system, and method for absorbing heat

InactiveUS20190016431A1Steering ruddersPropulsion power plantsRelief valveSteering system

According to an example aspect of the present invention, there is provided a steering system of an azimuthing propulsion system, the steering system comprising at least one hydraulic motor configured to operate an azimuthing system of a propulsion unit, the propulsion unit being arranged outside a vessel, a fluid cycle from the at least one hydraulic motor via a separate hydraulic overload protection unit and back to the motor, the overload protection unit comprises a pressure relief unit and a heat management unit, and wherein the pressure relief unit comprises a pressure relief valve, and the heat management unit comprises a heat storage, a heat exchanger, or a combination of both, and wherein the fluid cycle comprising the overload protection unit is configured to at least partially absorb heat generated during turning of the propulsion unit.

Steering system, azimuthing propulsion system, and method for absorbing heat

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Owner:ABB OY

12 results about "Relief valve" patented technology

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