59results about How to "Precise pressure regulation" patented technology

Presently disclosed is a hydraulic pump device and its use thereof, especially in a fluid delivery system. In one embodiment, the fluid delivery system is an inexpensive, single-use device for slow dosing medicament applications. The fluid delivery system may employ a spring-compressed bellows crank or other combination of simple mechanisms operating according to the well-known peristaltic principle to force a volume of ultrapure bio-inert hydraulic fluid through an aperture, thereby expanding one chamber of a two chamber hydraulic cylinder. The second, fluid storage chamber, containing the medicament, is emptied through a conventional orifice in response to the expansion of the pump chamber. The medicament may thence flow through any suitable infusion set into a patient removeably attached thereto.

The invention relates to the field of dividing and cutting machines and discloses a thin film dividing and cutting machine with rolling shafts overturnable. The thin film dividing and cutting machine comprises a PLC control mechanism, an unrolling mechanism, a dividing and cutting mechanism, a rolling mechanism and a discharging mechanism. The PLC control mechanism is connected with the unrolling mechanism, the dividing and cutting mechanism, the rolling mechanism and the discharging mechanism. The unrolling mechanism comprises an unrolling motor, an unrolling transmission mechanism and a material receiving platform. The unrolling transmission mechanism comprises a main traction roller, a traction pressing roller, an unrolling brake, a guide roller and a deviation-rectifying controller. The rolling mechanism comprises a rolling motor, rolling transmission mechanisms, a rolling shaft overturning mechanism and the two or more rolling shafts. The rolling shaft overturning mechanism comprises rolling shaft overturning plates, a rolling shaft supporting plate, overturning plate air cylinders and rolling shaft air cylinders, wherein the overturning plate air cylinders are used for driving the rolling shaft overturning plates to be overturned and located, and the rolling shaft air cylinders are used for locating the rolling shafts. One end of each rolling shaft is connected with the corresponding rolling shaft overturning plate, and the other end of each rolling shaft is connected with the rolling shaft supporting plate. The thin film dividing and cutting machine has the beneficial effects that rolling efficiency is high; rolling is conducted neatly; and time and labor are saved in the discharging process.

The invention discloses an in-situ calibration device for the steady state flow rate of a high-temperature propellant of an attitude control engine and a calibration method. The calibration device comprises a propellant supplying device, a high-low temperature box, a weighing and recycling device, a control system and a measuring system; the propellant supplying device is used for supplying flow rate, pressure and propellant at stable temperature for a calibration system according to the flow rate requirement on a mass flow meter to be calibrated; the high-low temperature box is used for heating the propellant supplying device according to the calibration requirement of the mass flow meter to be calibrated; the weighing and recycling device is used for weighing and recycling the propellant which flows through the mass flow meter within the calibration setting time; the control system is used for controlling and regulating the propellant supplying device, the high-low temperature box and the weighing and recycling device; and the measuring system is used for collecting and treating data. By adopting the device, the influence of medium temperature, density and the like on the measuring result of the mass flow meter can be effectively reduced, and the flow rate measuring accuracy is improved.

The invention relates to a backpressure balanced type liquid high pressure regulation device and belongs to the field of static pressure measurement and calibration. The backpressure balanced type liquid high pressure regulation device comprises a pneumatic hydraulic pump, a control stop valve, a balanced stop valve, a high-pressure pipeline, a pressure sensor, a test port, a ball screw assembly, a worm and gear reducer, a servo motor and a backpressure balanced type regulation device, wherein the backpressure balanced type regulation device comprises a ball screw pair output shaft, a slotted conical end fastening screw, a sealing group A, a guide wearing ring, a bracket, a sealing group B, a slotted flat end fastening screw, an O-shaped ring, an inner hexagonal cylindrical screw, a spring gasket, a sealing group C, a pressure regulating piston cylinder, a bushing, a pressure regulating piston, a supporting ring, a nut, a retainer ring, a limiting screw plug, a top column, a backpressure piston, a baffle ring, a backpressure piston cylinder and a transition cylinder. According to the device, the problem that the high oil pressure has large axial thrust on the piston in the actual high-pressure using process in a variable volume pressure control technology is solved, and the high-pressure pressure is easily and accurately regulated.

The invention belongs to the field of medical instruments, and relates to a uterine cavity compression hemostatic balloon catheter and a control system thereof. According to the uterine cavity compression hemostasis balloon catheter, a balloon and a balloon catheter are both provided with imaging rubber strips, so that doctors can quickly track and position the displacement of the catheter in a vagina and a uterine cavity at any time, and the operation is convenient and fast; after the balloon is inflated, the balloon is in an inverted pear shape, and in the balloon inflation process, exuded blood can be smoothly discharged out of the uterine cavity from a catheter drainage cavity and an outer surface of the balloon, so that blood clots are prevented from hindering the balloon to adhere tothe uterine wall, which influences the hemostatic effect. The uterine cavity compression hemostaticballoon catheter control system has the advantages of automatic control, safety monitoring and simple operation, can more intelligently and scientifically control the capacity of the balloon, ensures that the balloon can be tightly attached to the uterine cavity, and has a good hemostatic effect; the uterine cavity compression hemostatic balloon catheter can rapidly and accurately position, track and monitor safety.

An annular mating portion extends from a fastening surface of a fastening nut. The mating portion has an inner diameter set to be substantially equal to an outer diameter of the portion of a piston in which an accommodating groove is formed. In a state in which the mating portion is inserted into the accommodating groove and an inner circumferential surface of the mating portion slides in contact with a circumferential wall of the accommodating groove, the fastening nut is mated with a threaded portion and a lip seal is held between the mating portion and the accommodating groove. This fixes the lip seal to the piston.

The invention relates to a performance testing device for a sealing gasket under a high pressure and low temperature environment. The device comprises a test cavity, a liquid nitrogen refrigeration system, an electric heating temperature control system, a pressure adjustment system, a vacuum system, a data acquisition system and a visual observation system. The device provided by the invention cancontrol the temperature and pressure of a system in a wide range, and can realize the sealing performance test of the sealing gasket in the test pressure of 0 to 5 MPa and a temperature control rangeof -160 DEG C to +80 DEG C.

The invention discloses a sealing performance detection device for a fire-fighting spray head. The sealing performance detection device comprises a support, a screw rod elevator, a piston cylinder, aspraying head positioning plate and air cylinders, wherein the piston cylinder is fixed in the support, a piston is arranged in the piston cylinder, the top of the piston cylinder is provided with a water outlet port which can be in butt joint with a joint of a fire-fighting spray head to be detected, and a water inlet pipe used for injecting water into the piston cylinder is further arranged on the piston cylinder; the screw rod elevator is fixed in the support, and the top end of the lifting screw rod of the screw rod elevator is fixedly connected with the piston; and the fire-fighting sprayhead to be detected is fixed in the spray head positioning plate, a plurality of cylinder bodies of the air cylinders are fixed on the support, and the spray head positioning plate is fixedly connected with push rods of the air cylinders. The sealing performance detection device is small in water consumption, the pressure is adjustable in the detection process, the pressurization speed is high, the detection speed is high, and the efficiency is high.

The invention relates to a pressure-volume delivery system comprising a piston-cylinder unit with a piston acting on both sides (dual-action reciprocating piston), said piston having at least two different active surfaces in corresponding pressure chambers and the pressure chambers being connected to at least one consumer via hydraulic lines. The delivery system also comprises a drive for the piston-cylinder unit. According to the invention, the pressure chambers and / or hydraulic lines are interconnected by means of at least one or more switching valves connected in parallel and having a large flow cross-section (AV) and via a short hydraulic line or lines with low flow resistance.

The invention belongs to the field of organic fine synthesis, and relates to a method for preparing a biphenyl derivative by using a microchannel continuous flow reactor. The method comprises the steps: adopting the microchannel continuous flow reactor, feeding a grignard reagent, halogenated benzene, a solvent and a catalyst in a slurry feeding mode, and performing a reaction at 50-200 DEG C anda pressure of 0.1-2.0 MPa so as to obtain the biphenyl derivative. The preparation process of the biphenyl derivative has the characteristic of continuous feeding, the reaction space is a channel witha depth of 100 [mu]m-10 mm, and the reaction temperature and pressure can be set flexibly when the reaction is compared with conventional batch reactions, the reaction time is shortened from severalhours to several tens of seconds, a high reaction yield, few side reactions and a good mass transfer effect are achieved, and the safety problem brought by fierce heat release of reactions and other problems are solved; and the method can be applied to large-scale production of biphenyl derivatives, and provides a green economical and environment-friendly industrial preparation route for the compounds.

The invention provides a multi-stage throttling labyrinth pressure reducing valve which comprises a spring cover, a shell and a lower end cover. An adjusting nut is arranged at the upper end of the spring cover, an adjusting spring is arranged between the adjusting nut and a valve element, a return spring is arranged between the valve element and the lower end cover, the valve element is located in a sliding sleeve, the sliding sleeve is fixed in the shell, the shell forms a high-pressure cavity of an inlet and an outlet, a transition cavity is formed in the valve element, the shell and the sliding sleeve form a low-pressure cavity I, the lower end cover and the valve element form a low-pressure cavity II, the sliding sleeve and the valve element are correspondingly provided with upper throttling ports which communicate with the low-pressure cavity I and the transition cavity, the sliding sleeve and the valve element are correspondingly provided with middle throttling ports which communicate with the high-pressure cavity and the transition cavity, and the valve element is provided with a lower throttling port which communicates with the low-pressure cavity II and the transition cavity. The multi-stage throttling labyrinth pressure reducing valve has the advantages that pressure regulation is smooth and accurate, the anti-interference capability of the valve is improved, the structure is simple, maintenance is convenient, the service life is long, the cavitation risk of primary throttling high pressure difference is reduced, medium pressure feedback is more sensitive, and precision is higher.

The invention discloses an intelligent remote pressure regulating control system, and relates to the technical field of natural gas transmission and distribution control systems. The intelligent remote pressure regulating control system comprises three parts including a PLC control cabinet, a control terminal cabinet and field equipment, the PLC control cabinet outputs a control command to the control terminal cabinet based on intelligent voltage regulation control logics according to parameters collected by the field equipment, and the purpose of automatic pressure regulating is achieved. According to the control terminal cabinet of the intelligent remote pressure regulating control system, a gas storage tank provides gas storage pressure buffering for the pressure regulating system, feeds back gas storage pressure and provides control equipment and parameters such as a gas storage pressure increasing electromagnetic valve, a gas storage pressure reducing electromagnetic valve, a pressure increasing flow control valve and a pressure reducing flow control valve. The intelligent remote pressure regulating control system is stable in operation, the gas storage tank is used for providing air storage pressure buffering, pressure regulating control is facilitated, and the pressure regulating control system is more stable.

The invention belongs to the technical field of manufacturing of whitewashing equipment and relates to a multi-purpose electro-hydraulic spraying device. A main structure comprises a motor, a base, a filling port, a filling control valve, a lifting handle, video receiving equipment, a fixed support, a conveying switch, a micro-camera, a spraying head, a bend, a straight steel pipe, a pressure regulating device, a connector connecting part, a conveying hose, a conveying pipe, a box body connector, wheels, a box body, a pressure regulating unit and a boosting rod. The motor is in drive connection with the pressure regulating unit through the cylindrical boosting rod, the motor drives the boosting rod to move left and right to drive the pressure regulating unit to move, the camera is fixedly arranged above the spraying head to record the position and spraying information of the spraying head, and the video receiving equipment is used for checking real-time position information, transmitted by the micro-camera, of the spraying head. The multi-purpose electro-hydraulic spraying device is simple in main structure, ingenious in design concept, flexible and convenient to use, good in spraying effect, high in efficiency, high in practicality, good in application environment and wide in market prospect.

A pressure regulator for controlling the flow of gas from a high pressure source to a low pressure device includes a body having a high pressure inlet defining a seat. An adjusting collar has a centrally located bore. The collar engages the body at any predefined radial orientation. The collar has a thread and is securable to the body at the selected radial orientation. The regulator also has a threaded bonnet to engage the collar. A locking ring engages the body and secures the adjusting collar to the body. A piston has a central bore and is disposed within a piston chamber that defines a gap between the piston and a wall. The piston is movable between an open condition and a closed condition. A spring moves the piston to the open condition. A pin valve is disposed in the central longitudinal bore in the piston.

The invention belongs to the technical field of carton binding, and provides a carton stapler with paper board clamping positions being changeable. The carton stapler comprises a rack, an upper conveying mechanism, a lower conveying mechanism and a paper stapling device. The upper conveying mechanism comprises a first connecting plate and first conveying belts. The first connecting plate is arranged on the rack in a transverse sliding manner. The number of the first conveying belts is two, the two first conveying belts are arranged on the two sides of the first connecting plate correspondingly, and the first conveying belts are used for conveying paper boards in the longitudinal direction. The lower conveying mechanism comprises a second connecting plate and second conveying belts. The second connecting plate is arranged on the rack in a transverse sliding manner. The number of the second conveying belts is two, the two second conveying belts are arranged on the two sides of the secondconnecting plate correspondingly, and the second conveying belts are used for conveying the paper boards in the longitudinal direction. The paper stapling device is arranged on the rack and is used for stapling the paper boards. By means of the technical scheme, the problem that carton staplers are not suitable for binding of paper boards small in transverse size in the prior art is solved.

The invention provides a viscous liquid cavitation inception pressure measuring device, which can be used for observing cavitation inception pressure of a viscous liquid at different temperatures. The measuring device comprises: a visual liquid storage unit used for storing a to-be-measured viscous liquid and having transparent and visible property; a pressure control unit used for controlling the pressure in the visual liquid storage unit, so that the viscous liquid in the visual liquid storage unit generates a cavitation phenomenon; a temperature control unit used for regulating and controlling the temperature of the viscous liquid in the visual liquid storage unit; a sensing unit used for monitoring the pressure, the air content and the temperature of the viscous liquid in the visual liquid storage unit; and an observation unit used for observing and recording whether the viscous liquid in the visual liquid storage unit is cavitated and the cavitation process.

The invention discloses low shear single well mixed liquid injection allocation equipment. The low shear single well mixed liquid injection allocation equipment comprises a liquid injection pipeline and a pressure adjusting polymer injection device, the liquid injection pipeline is provided with a high pressure ball valve and a pressure transmitter, and the low shear single well mixed liquid injection allocation equipment further comprises a flow measuring and controlling assembly, a check valve, a mixed liquid inlet and a mixer which are sequentially arranged; the pressure adjusting polymer injection device comprises at least two change-over valves, at least one spiral pipeline arranged between two adjacent change-over valves and a washing device, and the washing device comprises a washing water inlet pipe and washing water outlet pipe which correspondingly communicate with the two change-over valves along the front end and the rear end of a flow body; and the pressure transmitter andthe flow measuring and controlling assembly are correspondingly connected with a control system. According to the low shear single well mixed liquid injection allocation equipment, pressure adjustment is commonly completed through the flow measuring and controlling assembly and the pressure adjusting polymer injection device, and adjusting is more accurate; viscosity reducing in a controllable range is guaranteed through the pressure adjusting polymer injection device; the double-procedure operation is arranged in the pressure adjusting polymer injection device, clear water is adopted to washonline, and the service life is prolonged; and the low shear single well mixed liquid injection allocation equipment is easy to mount, and adjustment is flexible.

The invention discloses an external mechanical water seal adjusting device for a gas collecting pipe in type of single carbonization chamber adjustment. The device comprises a bridge pipe, a mechanical water seal valve outer cover, a funnel cup, a groove-shaped pipe, a piston assembly and a piston driving assembly. The external mechanical water seal adjusting device is an executive device which isautomatically adjusted by a single carbonization chamber pressure adjusting system; in different stages required by the process, the piston assembly acts to different positions to control the water level of ammonia water in the funnel cup, so that the purpose of accurately adjusting the pressure of the carbonization chamber is achieved. In the coke oven production, in different production processes, the mechanical device is adjusted in real time according to the change of the pressure value given by the process, so that the smoke dust unorganized emission pollution in the coke oven productionprocess can be reduced, and the energy-saving and environment-friendly requirements are met. Moreover, on the premise of ensuring the coke quality, the recovery rate of coal gas and chemical productsis improved. Due to the fact that the external mechanical water seal adjusting device is installed outside the gas collecting pipe, installation and later maintenance are convenient.

The invention, which relates to the technical field of sensor calibration, discloses a mounting device for pressure sensor calibration. The mounting device comprises a bottom plate. Supporting columnsare arranged at left and right ends of the upper surface of the bottom plate; a top plate is arranged at the tops of the supporting columns; cylinders are arranged at left and right ends of the lowersurface of the top plate; and a lifting plate is fixedly connected to piston rods of the cylinders. The middle part of the lifting plate is in sliding connection with middle parts of first guiding rods; the lower ends of the first guiding rods are fixedly connected with a fixing plate; and the middle of the upper surface of the fixing plate is in rotation connection with a lower end of a lead screw. A second connecting base is arranged in the middle of the lower surface of the fixing plate; the lower end of the second connecting base is connected with the upper end of a force measuring ring;the lower end of the force measuring ring is connected with a first connecting base; and the lower end of the first connecting base is fixedly connected with a pressing plate. According to the invention, the mounting device has advantages of simple structure and light weight and can move with a vehicle; calibration work can be directly carried out on a construction site conveniently; the convenience is improved; and the mounting device is suitable for application and popularization.

The invention discloses a hydraulic system capable of guaranteeing simultaneous working of a fire-fighting cannon and large-flow fire-fighting water guns. The hydraulic system comprises a water inlet(3), a fire-fighting pump (1) connected with the water inlet (3) through a pipe, and a first branch and a second branch which are connected with the fire-fighting pump (1), wherein the first branch isconnected with the fire-fighting cannon (10); the second branch is connected with a metering valve (5); the metering valve (5) is connected with a third branch and a fourth branch; the third branch is connected with a self-balancing pressure relief valve (6); the fourth branch is divided into a fifth branch and a sixth branch; the fifth branch is connected with a first fire-fighting water gun (11); the sixth branch is connected with a second fire-fighting water gun (12); the self-balancing pressure relief valve (6) is connected with a gas pressurizing pump (2). The hydraulic system provided by the invention is reasonable in structural design, high in integration performance and convenient to use, can achieve two output pressures by one fire-fighting pump, can guarantee the simultaneous working of the fire-fighting cannon and the large-flow fire-fighting water guns, and is strong in practicality.

The invention discloses a mechanical stimulation set and self-adaptation capsule casing device for treating sarcopenia. The mechanical stimulation set achieves the technical purpose that pressure is precisely applied to muscle tissue for vibration to treat sarcopenia. According to the adopted technical scheme, the mechanical stimulation set for treating sarcopenia comprises a vibrating device, a deformable trigger plate, an air source system and an air bag, the vibrating device can drive the deformable trigger plate to reciprocate to generate vibration stimulation to skin; the air source system can inject exhaust gas to the air bag, the air bag directly or indirectly applies pressure to muscle tissue, mechanical stimulation for vibrating and applying pressure to the muscle tissue is performed, micro-circulation of lower limb muscle tissue is improved, and the purpose of treating sarcopenia is achieved. The self-adaptation capsule casing device for treating sarcopenia comprises a leg sleeve, the leg sleeve is of a dual-layer structure, a cavity is formed between the inner layer and the outer layer, the mechanical stimulation set for treating sarcopenia is arranged inside the cavity,and the deformable trigger plate is attached to the inner layer of the leg sleeve.

The invention relates to an experimental device and experimental method for vibration deformation of an oblique bending gas well production tubular column. The experimental device comprises a piston air compressor, a control valve, a pressure gauge, a guide tube, an adapter, an inner tube, a fixing plate, an outer tube, an outer tube fixture, telescopic support rods, sliding wheels, a sliding slot, pressure sensors, a cable, a computer and a fixing bracket, wherein the fixing bracket is composed of the telescopic supports, the sliding wheels and the sliding slot, and arc-shaped bending tube required to be simulated by the experiment can be adjusted through changing the length of the telescopic support rods and the position between two sliding wheels. The piston air compressor generates a high-pressure gas, the high-pressure gas flows through the inner tube to cause vibration, the same pressure as the gas collected in the actual condition is adjusted through the combination of the control valve and the pressure gauge, and then data of the pressure sensors when the air pressure passes through the inner tube and enables the inner tube to deform is collected on the computer. The experimental device has the advantages that the device is safe and reliable, the operation is simple, the measurement data is accurate, and the gas production working state of the bending tubular column inthe high-pressure gas well is highly reproduced.

The invention discloses no-pressure storage bottle conveying equipment, which comprises a rack, a conveying belt arranged on the rack, and a variable frequency motor for driving the conveying belt, wherein the rack is also provided with a lubrication device; the lubrication device comprises a lubrication plate, a lubrication component arranged on the lubrication plate, and a conveying pipe connected with the lubrication plate; a storage cavity for containing lubricant is arranged in the lubricating plate; one end of the conveying pipe is connected with the storage cavity, and the other end isexternally connected with a lubricant storage tank through an oil pump; the lubrication component comprises a plurality of balls arranged along the width direction of the conveying belt; parts of eachball extend into the storage cavity; and the plurality of balls are abutted against the conveying belt. Since the oil feeding of the conveying belt adopts a mode that the balls are dipped into oil and are coated, the oil feeding evenness of the conveying belt is favorably guaranteed.

An ink cartridge, comprising a shell and a covering part, forms a hollow receiving part when connected together, and in the receiving part, an ink absorber made of laminated fiber materials is installed. On the covering part, there are provided ribs protruding into the accommodating part. The ribs include ribs in a first direction disposed obliquely to the fiber lamination surface of the ink absorber, and ribs in a second direction perpendicularly intersecting the ribs in the first direction. An atmosphere communication port is formed at a position surrounded by the ribs in the first direction and the ribs in the second direction, and a communication port guide extending into the accommodating portion is provided around the atmosphere communication port. The height of the rib is greater than that of the communication port guide. The ribs press against the ink absorber and do not become buried therein. By adopting the rib with such a structure, the ink use efficiency in the ink tank can be improved, the ink can be prevented from leaking to the outside, and the rib can also be prevented from breaking.

The invention discloses a remote ignition device. The remote ignition device comprises an oil tank, a gear oil pump, an ignition gun, a control box, a torch and a 220 V external power source for supplying power to the control box. The gear oil pump and the ignition gun are both connected with the control box, and therefore remote ignition of the torch can be achieved through the control box. The remote ignition device further comprises a pressure adjusting assembly, and therefore the pressure of an oil outlet of the gear oil pump can be precisely adjusted through the pressure adjusting assembly; and in addition, the remote ignition device further comprises a flame detector, thus, the flame condition of the torch can be acquired in time through the flame detector, and the control box can conveniently control the remote ignition device to carry out ignition operation.

In a method for optimizing the pressure setting accuracy, a hydraulic pressure is built up according to a pressure requirement of a hydraulic pump, and overflow control is performed using an analog-controlling hydraulic valve and a known control characteristic curve of the analog-controlling hydraulic valve, which overflow control counteracts a pressure build-up produced by the hydraulic pump that exceeds the pressure requirement. In addition to the known control characteristic curve of the analog-controlling hydraulic valve, at least one additional valve characteristic is taken into account for the overflow control.