11results about How to "Reduce dead volume" patented technology

A water injection system for an internal combustion engine includes at least one distributor device having at least one tubular distributor pipe and at least one disc-shaped connecting element, and at least one injection valve, wherein the injection valve has an annular electromagnetic coil acting on an armature that can move up and down, and the armature is connected to the valve element. A hollow cylindrical core is constructed on the injection valve, and the core is surrounded by the electromagnetic coil at least in sections. An inlet pipe is constructed on the injection valve, and water from the distributor device can be supplied to the injection valve via the inlet pipe. The inlet pipe of the injection valve is inserted into the cup-shaped connecting element of the distributor device and is thus connected to the distributor device. It is proposed that the distributor device includes at least one body, which extends from the distributor device into the inlet pipe of the injection valve in the interior of the cup-shaped connecting element, and the inlet pipe is penetrated by a flow channel in the axial direction, and the flow channel defines an inlet opening for supplying water from the distributor device to the injection valve.

The present invention relates to an integral high-pressure and ultra-large flow hydraulic distributing valve, comprising a valve body, wherein a stepped groove is provided in the valve body, which is located at the same hole center and has a decreasing aperture from top to bottom, the bottom of the stepped groove is connected to the liquid inlet through hole, and the suction valve seat, suction valve core, extrusion valve seat, extrusion valve core and extrusion valve stopper that contact and cooperate with each other are arranged in sequence upward along the bottom of the stepped groove, and the extrusion valve stopper is connected to the liquid discharge through hole. The present invention has a compact and reasonable structure and is easy to operate. By adopting a flat valve structure, the lower part of the suction valve core has a parabolic structure, which is conducive to reducing valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure, which solves the problem of the valve core rotating when impacted by high-speed uneven fluid; the extrusion valve seat is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core and enhancing the operating stability of the distributing valve.

The present invention provides a low-temperature full-volume tank with a low-liquid-level material extraction device, comprising an inner tank, an outer tank, an operating platform and a material extraction device capable of extracting low-liquid-level materials; the material extraction device comprises a material circulation tank and a cryogenic pump installed on the operating platform, a first venturi mixer installed at the bottom of the inner tank and corresponding connecting pipelines; the low-temperature medium in the material circulation tank can enter the first venturi mixer through the cryogenic pump and the introduction pipeline, so that the low-temperature medium in the inner tank can enter the first venturi mixer through the suction hole of the first venturi mixer under the action of pressure difference, and enter the material circulation tank through the outlet pipeline after mixing. The present invention can extract the low-liquid-level low-temperature medium in the pump column of the low-temperature full-volume tank that cannot be extracted by the submersible pump, reduce the ineffective volume of the low-temperature full-volume tank, and improve the volume utilization rate of the full-volume tank; the low-liquid-level material extraction device can also be used as a backup extraction facility other than the pump column.

The invention provides a high-pressure durability test method for a hydraulic fluid module. The high-pressure durability test method comprises the following steps: acquiring target test pressure and target pulse frequency of the hydraulic fluid module; calculating a minimum fluid volume required by a test element based on this; a metal cylinder and an optional metal ball are filled in an inner cavity of the test element, and the actual effective fluid volume of the test element is adjusted to meet the minimum volume requirement; connecting a test system, injecting and heating a test medium, and then applying a pulse pressure waveform conforming to a target parameter to carry out a durability test; and finally, judging the durability of the test element by monitoring whether the test element leaks or not. By actively and accurately adjusting the effective fluid volume of the test element, effective formation and stable transmission of the high-pressure pulse waveform are ensured, and the reliability and accuracy of the fatigue life test of the hydraulic element under the high-pressure working condition are remarkably improved.

The invention discloses a medicine inspection sample preparation method and device, and belongs to the technical field of medicine inspection. According to the method, through the key steps of gradient alkalifying pH linkage control, gradient elution, temperature programming drying quality monitoring, pre-enrichment and the like, accurate treatment of a test solution is realized; the core lies in that a capillary microfluidic analysis chip with a multi-layer composite structure is adopted, the channel size matching and connection design is optimized, and the sample treatment efficiency and purity are improved. The corresponding device integrates an intelligent control system, a pH monitoring module, a laser particle size monitoring module and the like, and full-process automatic control is achieved. The defects that in the prior art, operation is tedious, the automation degree is low, sample loss is large, and a micro-fluidic chip is large in dead volume are overcome, the prepared sample is high in purity and accurate in concentration, the method is suitable for various types of samples to be tested, the accuracy and efficiency of drug inspection can be remarkably improved, and the method has important industrial application value.

The utility model relates to a pressure swing adsorption tower system capable of improving product gas CO purity, which comprises an adsorption tower, a tower top pipeline assembly and a tower bottom pipeline assembly, a tower top airflow distributor and a drainage cylinder are arranged at the top of the adsorption tower, the drainage cylinder is in a circular truncated cone shape, the top of the drainage cylinder is connected with the tower top airflow distributor, and the bottom of the drainage cylinder is connected with the inner wall of the adsorption tower. Airflow passing through the tower top flows through the drainage cylinder, so that the volume of the tower top for accommodating gas is reduced; the top of the adsorption tower is connected with a tower top pipeline assembly, and the tower top pipeline assembly sequentially comprises a pre-adsorption gas outlet pipe, a pressure-equalizing gas outlet pipe, a pressure-equalizing gas inlet pipe, an adsorption tail gas outlet pipe and a replacement gas outlet pipe from inside to outside, so that replacement gas discharged from the adsorption tower can pass through the tower top pipeline assembly and then is discharged from the replacement gas outlet pipe; residual light component gas in the tower top pipeline assembly is taken away as much as possible; the bottom of the adsorption tower is connected with a tower bottom pipeline assembly; the tower bottom pipeline assembly sequentially comprises a vacuumizing gas outlet pipe, a reverse gas outlet pipe, a replacement gas inlet pipe, a raw material gas inlet pipe and a pre-adsorption gas inlet pipe from inside to outside.

The invention discloses a stirring device, and belongs to the technical field of stirring equipment. The device comprises a tank body, a fixed annular gear, a movable annular gear, a power mechanism for driving the movable annular gear, two circular gears symmetrically arranged between the two annular gears, and a rotating shaft connected with the circular gears, wherein the fixed annular gear and the movable annular gear are coaxially arranged and spaced by a certain distance; the cam groups are fixed on the rotating shaft; and the stirring ring is positioned in the tank body. Each stirring ring is connected with the corresponding cam set through a connecting rod, and the cams drive the stirring rings to reciprocate in the longitudinal direction when rotating. The plurality of stirring rings not only perform circumferential stirring together, but also independently move in the longitudinal direction, so that the relative distance between the stirring rings is dynamically changed, and the materials are fully disturbed and mixed. Through layered stirring and longitudinal dynamic movement, the material mixing effect is remarkably improved.

The utility model relates to a kind of phenolic wastewater treatment catalytic / filter coupling device, it relates to a kind of phenolic wastewater treatment device.The utility model is to solve the technical problems that the existing catalytic oxidation-membrane separation coupling process exists unit long, catalyst loss and membrane pollution.The utility model first couples sludge biochar catalytic oxidation and microfiltration membrane in same device, with integrated design significantly shorten process, reduce dead volume and energy consumption;Through the three-stage gradient interception structure of hierarchical aperture metal screen-PP cotton-microfiltration membrane, form the particle size barrier from bottom to top, synergistically inhibit the loss of sludge biochar and membrane pollution, so that sludge biochar maintains high activity in continuous operation, to ensure water quality while extending the stable operation period of system, provide new technical paradigm for the economic and efficient advanced treatment of phenol-containing wastewater.

The present invention proposes a method for transporting supercritical CO 2 The reciprocating pump of the medium, in which the front chamber section is filled with the front filling assembly, the rear chamber section is filled with the plunger, and the lower chamber section and the upper chamber section are filled with the liquid inlet valve assembly and the liquid discharge valve assembly respectively. This layout makes it possible to provide supercritical CO 2 The volume of the medium entering is small, and when the plunger moves forward, the invalid volume is only the safety gap reserved between the plunger operating chamber, the rear chamber section and the plunger, so that the invalid volume of the present invention is small and the pump efficiency is improved; the upper end of the inlet valve core and the lower end of the discharge valve core of the present invention are located in the plunger operating chamber when the plunger moves backward, and when the plunger moves forward, the upper end of the inlet valve core and the lower end of the discharge valve core are retracted into the inlet valve seat and the discharge valve seat respectively, thereby filling the invalid volume in the inlet valve seat and the discharge valve seat, so that the invalid volume of the present invention is further reduced and the pump efficiency is further improved.

The utility model discloses a domestic drinking water tank which comprises a tank body, a water inlet assembly and a control assembly. One end of the water inlet assembly extends into the box body and is used for supplying water into the box body, and the other end of the water inlet assembly is connected with a municipal pipe network; one end of the water inlet assembly is connected to the control assembly; one end of the control assembly is arranged in the box body; one side of the bottom end of the box body sinks and is provided with a water absorption pit, and the water absorption pit is communicated with a user water using end; a plurality of partition plates are arranged in the box body, and a cavity is formed between any two adjacent partition plates. The water tank has the advantages that water flow in the cavity can advance in a pushing mode by arranging the partition plate, it is guaranteed that water entering the water tank firstly can be used by a user in advance, the storage time of the water in the water tank is shortened to the maximum extent, and in addition, when the size of the tank body reaches a certain degree, the partition plate can play a structural supporting role on the tank body at the same time. The water absorption pit can reduce the invalid volume of the bottom of the water tank, thereby reducing the dead water area at the bottom.

This application relates to a sunken stockpile structure for expanding stockpile capacity. This application is applicable to the field of material storage and transportation technology. The technical problem to be solved by this application is: to provide a sunken stockpile structure for expanding stockpile capacity. The technical solution adopted in this application is: a sunken stockpile structure for expanding stockpile capacity, comprising: a sunken stockpile site; at least one feeding conveyor belt located above the sunken stockpile site, with its lower part fixed to the sunken stockpile site by supports; at least one underground channel located below the sunken stockpile site, with at least one unloading port above each underground channel; a discharge conveyor belt disposed within the underground channel; a sealing cover covering the sunken stockpile site; and several mist cannons evenly distributed within the sunken stockpile site.