13results about How to "Little flow fluctuation" patented technology

The invention discloses a natural gas station intelligent distribution method based on the Internet of Things, and relates to the technical field of natural gas station distribution design. Flow, pressure and valve state data are obtained in real time through an Internet of Things sensor, and a weighted average method and Kalman filtering are used for data fusion and optimization; meanwhile, the relative position relation between the flow meter and the adjusting valve is judged in real time, branch configuration changes are dynamically recognized, self-adaptive branch matching logic is triggered, and therefore control logic is adjusted; meanwhile, the opening degree of the valve is controlled through PID, self-adaptive dead zone compensation is conducted in combination with historical operation data of the valve and the current state, valve response delay is eliminated, the adjusting precision is improved, and flow fluctuation is reduced; in addition, in the feedback adjusting stage, the adjusting result is continuously monitored, the actual flow and the pressure value are compared with the target value, the opening degree of the valve is dynamically adjusted through real-time error calculation, and the output is kept consistent with the target.

The invention relates to the technical field of gears, in particular to a five-section type spiral gear for hydraulic equipment, which comprises a gear, the single tooth profile of the gear sequentially comprises an arc AB, a transition curve BC, an involute CC ', a transition curve B' C 'and an arc A' B 'from the tooth top to the tooth root, and the slope of the transition curve BC is monotonically decreased; each of the transition curve BC and the transition curve B 'C' comprises one of a Bayes curve, a high-order spline interpolation curve and an elliptic curve. Through the arrangement of the arcs AB and the arcs A 'B', the oil trapping problem can be effectively solved, and no extra influence is caused on gear meshing; through the arrangement of a transition curve BC and a transition curve B 'C', the tooth shape design of the gear can be flexibly adjusted according to actual use requirements; the performance of low vibration and low noise is achieved; and meanwhile, the situation that hydraulic equipment collides with one another can be avoided, and the use efficiency of the gear is effectively improved.

The application discloses an intelligent monitoring infusion pump, and particularly relates to the technical field of infusion pumps, which comprises a connecting cylinder, a flow guide monitoring assembly is arranged on the connecting cylinder, the flow guide monitoring assembly comprises a gathering ring embedded in the connecting cylinder, a center block is arranged in the middle of the gathering ring, a baffle is arranged at the bottom of the center block, and a storage cavity is formed between the center block and the baffle. The application can realize manual fine adjustment of the flow of the liquid medicine, rapidly block the air path when the liquid level is abnormal or emergency liquid stopping is needed, realize automatic emergency adjustment of pressure and flow, solve the problem that the prior art can only detect pressure but cannot quickly adjust, meanwhile, the storage cavity formed by the center block and the baffle can temporarily store the liquid medicine, so that the bubbles rise and escape under the action of buoyancy, the bubbles are prevented from entering the blood vessels of a patient along with the liquid medicine, and the defect that bubbles are difficult to eliminate in the prior art is solved.

The invention relates to a needling instrument cleaning system of an analyzer. The needling instrument cleaning system comprises a liquid supply assembly, a booster pump, a multi-way valve and a plurality of flow dividing assemblies. The liquid supply assembly is used for supplying cleaning liquid; the booster pump is communicated with the liquid supply assembly; the multi-way valve is provided with a liquid inlet end and a plurality of liquid outlet ends, the liquid inlet end communicates with a liquid supply assembly through the booster pump, and the booster pump can pressurize and convey the cleaning liquid to the multi-way valve; each flow dividing assembly comprises a needle and a flow dividing block, each flow dividing block is provided with an inlet and a flow dividing opening, the inlets can be communicated with the liquid outlet end and correspond to the liquid outlet end in a one-to-one mode, and the needles are communicated with the flow dividing openings; when the inner wall of the needle of one flow dividing assembly needs to be cleaned, one liquid outlet end of the multi-way valve is opened and communicates with an inlet of the flow dividing block corresponding to the flow dividing assembly, and the other liquid outlet ends of the multi-way valve are closed.

The invention discloses a micro-nano metal structure electrofluid and electrochemical composite 3D printing method and device.The printing method comprises the steps that a non-metal micro-nozzle injected with metal ion-nanoparticle mixed liquid serves as a printing tool, and a microwire electrode connected with the positive electrode of a voltage source is inserted into the metal ion-nanoparticle mixed liquid in the non-metal micro-nozzle in a suspended mode; connecting the substrate with the negative electrode of the voltage source; the voltage source applies an electric field between the microwire electrode and the base material, and the metal ion-nanoparticle mixed liquid is sprayed out in the form of ionic liquid drops wrapping metal particles under the action of traction force of the electric field and flies to the surface to be deposited of the base material at a high speed in the direction of an electric field line; under the synergistic effect of impact self-sintering of the metal nanoparticles and oxidation-reduction precipitation of the metal ions, layered forming of the metal micro-nano structure is achieved; layer-by-layer accumulation printing of the micro-nano scale complex three-dimensional metal structure is achieved by controlling the printing distance, and high-precision, high-strength, post-treatment-free, efficient and low-cost preparation of the multi-material array structure can be achieved.

This invention proposes a liquid supply device and a substrate cleaning method. The liquid supply device includes a nozzle, the liquid inlet of which can adopt a tangential liquid inlet to promote gas-liquid separation using centrifugal force; a plate-shaped separation section or a cylindrical separation section can be provided above the liquid outlet of the nozzle to suppress the discharge of air bubbles from the liquid outlet; the nozzle can have an upper and lower chamber structure, with exhaust ports in both chambers to achieve secondary exhaust; both chambers can also be equipped with liquid inlets to allow the processing liquid to be mixed twice, which reduces the amount and rate of gas generation compared to single mixing; it also includes a control unit and a liquid level sensor. The control unit adjusts the opening of the regulating valve on the exhaust line of the nozzle based on the liquid level detection signal obtained by the liquid level sensor, so as to maintain a stable liquid level in the nozzle, which helps to reduce the flow fluctuation when the nozzle supplies liquid to the substrate and improves the uniformity and reliability of liquid treatment.

The utility model belongs to tobacco processing technical field discloses a kind of material uniform conveying device, material uniform conveying device includes conveying belt, support frame, first movable seat, material uniform main part and driving part, first movable seat is located on support frame, and the height position of first movable seat is adjustable along vertical direction relative to support frame;Material uniform main part is located above conveying belt, material uniform main part includes roller and the multiple material uniform plates that are intervalled along the circumferential direction of roller, roller rotation is located on first movable seat, and the length direction of material uniform plate extends and is arranged along the rotation direction of roller;Driving part is located on support frame.The utility model provides material uniform conveying device, driving part drives roller rotation and drives material uniform plate to push and scrape on conveying belt Cut tobacco, it is favorable to the distribution of Cut tobacco on conveying belt even, in turn, it is favorable to reduce the flow fluctuation of Cut tobacco before conveying, it is favorable to improve the quality of Cut tobacco.

This utility model discloses a valve sleeve integrated hot nozzle, relating to the field of hot runner technology. It includes a hot nozzle body with a hot runner channel inside. The hot runner channel has a main flow channel, a primary flow channel, and secondary flow channels connected sequentially. The main flow channel is arranged along the central axis of the hot nozzle body. Multiple secondary flow channels are arranged in a ring around the central axis of the hot nozzle body. Multiple primary flow channels are arranged, each corresponding to one of the secondary flow channels, and flow obliquely or branching from the main flow channel to guide and divert molten plastic in the main flow channel to the secondary flow channels. Each secondary flow channel is equipped with a valve control assembly, which includes a valve needle and a valve sleeve. The valve needle is movably inserted into the valve sleeve, and the opening and closing of the discharge hole at the bottom of the secondary flow channel is controlled by the axial sliding of the valve needle relative to the valve sleeve. This helps to reduce the dimensional tolerances of multi-cavity injection molded parts.

The utility model provides a value-added urea production device. The value-added urea production device comprises a molten urea evaporation system, a three-way switching valve, a static mixer and a granulation device which are connected in sequence, the static mixer is connected with an additive adding device; the additive adding device comprises an additive barrel, a suction pump, a distribution tank, a filter and a head tank which are connected in sequence; the distribution tank is connected with a compressed air inlet pipeline and an exhaust pipeline, and is also connected with a desalted water adding device. According to the utility model, the additive injection point is positioned in the static mixer behind the three-way switching valve, so that the additive and the molten urea are mixed and then immediately enter the granulating device, and cannot be returned to a molten urea system under abnormal working conditions, and the corrosion aggravation of equipment caused by the fact that chloride ions enter an evaporation system and a front system is avoided; and meanwhile, product switching is more efficient, additives are fully utilized, transition products are reduced, and the production cost is reduced.

This utility model discloses a thin-film evaporation system, comprising a first reaction vessel, a second reaction vessel, a thin-film evaporation mechanism, a temporary storage vessel, and a Roots pump. The thin-film evaporation mechanism consists of a thin-film evaporator, a heavy component buffer tank, and a light component buffer assembly. The system adopts a bidirectional material circulation design: the feed liquid in the first reaction vessel is processed by the thin-film evaporator, and the light components enter the second reaction vessel via the light component buffer assembly and the temporary storage vessel; the heavy components enter the second reaction vessel via the heavy component buffer tank and the temporary storage vessel. The feed liquid in the second reaction vessel can also be processed by the thin-film evaporator, with the light and heavy components passing through the light component buffer assembly and the heavy component buffer tank respectively, and finally flowing back to the first reaction vessel via the temporary storage vessel. This design effectively reduces system flow fluctuations and improves evaporation efficiency through the buffering effect of the temporary storage vessel.

The present invention discloses a preparation method for iron phosphate powder by microporous filtration and concentration and a preparation device thereof. The preparation method includes: putting raw materials into a reactor to react for nucleation, a mother liquor generated after raw materials reaction entering the filter concentrator, and controlling and starting a stirring shaft for driving an upper stirring blade and a lower stirring blade to rotate for grinding and scaling; when a mother solution level exceeds an upper liquid inlet end of lower microporous filtration tube groups, controlling and starting a filtrate valve of a filtrate tube of the lower microporous filtration tube groups, and when the mother solution level exceeds the upper liquid inlet end of upper microporous filtration tube groups, controlling and starting a filtrate valve of a filtrate tube of the upper microporous filtration tube groups. The present invention has small instantaneous flow fluctuation, has the characteristic of good accuracy of a reaction system, and integrates a filtration system and an intermediate tank to effectively reduce the volume and shorten the reaction process.

The utility model relates to be used for powder transmission multistage transmission device, including the storage tank for storing powder, with the storage tank connection first grade screw conveyer, its contained spiral blade one adopts variable diameter structure, from the feed end to the discharge end blade diameter gradually reduces, and the first grade screw conveyer with horizontal plane inclination angle theta <=15 DEG, the drive motor of first grade screw conveyer one passes through frequency changer control rotating speed, with the second grade metering conveyer of first grade screw conveyer connection, the second grade metering conveyer's body has at least installed three weighing sensors, controller, weighing sensor and controller electric connection, the controller passes through communication module with frequency changer two -way communication, through the utility model can constant blade and the clearance between casing avoid material stagnation, ensure the continuity of conveying, automatic regulation first grade conveyer rotating speed, make material flow fluctuation be smaller, satisfy high -precision metering demand.

The utility model discloses a pump head of a peristaltic pump, which belongs to the technical field of peristaltic pumps and comprises a fixed seat, a rotating component is arranged on the front side of the fixed seat, a driving component is arranged behind the fixed seat and connected with the rotating component, an upper pressing block is arranged on one side of the rotating component, and a lower pressing block is arranged on the other side of the rotating component. One side of the upper pressing block is connected with the fixing base, an elastic assembly is arranged above the other side of the upper pressing block, a hose is arranged between the upper pressing block and the rotating assembly, and a fixing assembly is arranged on the side, away from the upper pressing block, of the rotating assembly. The pump head of the peristaltic pump is not affected by tolerance and is high in coaxiality.