58results 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 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.

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 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 pressure model establishing method and device and a pressure adjusting method and device, and the pressure model establishing method comprises the steps: obtaining historicaldata of original influence parameters of target equipment, the historical data comprising dependent variable data and N1 pieces of data of the original influence parameters, and N1 being a positive integer greater than one; according to the historical data, recombining the original influence parameters to obtain independent variable data, the independent variable data comprising data of N2 recombined influence parameters, and N2 being a positive integer larger than N1; and constructing a target pressure model according to the independent variable data and the dependent variable data.

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.

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.