22 results about "Dropping funnel" patented technology

The utility model relates to a dropping funnel of an infusion apparatus, and belongs to a medical instrument accessory. Comprising a shell with a liquid inlet at the upper part and a liquid outlet at the lower part, the shell consists of an upper shell and a lower shell which are fixedly connected with each other, a bubble filtering membrane for separating an upper cavity and a lower cavity of the lower shell is fixed in the lower shell, the liquid outlet is positioned below the bubble filtering membrane, and an exhaust cap is fixed on the shell above the bubble filtering membrane. According to the utility model, the functions of automatic exhausting, automatic filtering, automatic liquid level keeping, automatic bubble eliminating and automatic liquid stopping can be realized, so that the labor intensity and mental burden of medical personnel are greatly reduced, and the infusion efficiency is improved.

The utility model relates to an improved nitrogen distillate absorption device, which comprises a distillation flask, a splash-proof ball tube, a guide tube, a condensing tube and a conical flask with double connecting balls which are connected in sequence, and a dropping funnel is arranged between the distillation flask and the splash-proof ball tube, and is characterized in that the distillation flask is provided with a temperature control device, the guide tube is U-shaped, and the condensing tube is arranged in the conical flask. The conical flask with the double connecting balls is connected to the lower end of the condenser pipe, and the opening of the conical flask with the double connecting balls is S-shaped. The gas absorption and titration device is simple, clear and accurate, and solves the problems that in the prior art, the heating temperature is too high, the temperature control is unstable, and the heating is not uniform; the gas flow speed is too high, so that the absorption is incomplete; the solution absorbed by the conical flask is easy to splash out, and system errors are easy to generate, so that the test is accurate.

The present application relates to a kind of drop tower automatic assembly machine, including ring rail jig device, the periphery of the ring rail jig device is sequentially provided with puncture device feeding device, nut feeding device, sealing ring feeding device, drop tower feeding device, assembly device, visual detection device, sheath feeding device, finished product unloading device and substandard product unloading device, the ring rail jig device includes jig guide rail, suspension module and rotor, the rotor circulates on the jig guide rail, jig is installed on the rotor, puncture device and drop tower can be placed on the jig.Compared with prior art, the present application realizes the full automation of drop tower assembly component feeding and assembly process, greatly improves the assembly efficiency of drop tower assembly, reduces manual participation, reduces the possibility of drop tower assembly being contaminated during assembly process.

The utility model relates to the technical field of dropping funnels, in particular to an anti-blocking dropping funnel. According to the technical scheme, the device comprises a dropping pipette and a liquid storage funnel, a liquid outlet pipe is fixedly connected to the lower surface of the liquid storage funnel, a funnel pipe is fixedly connected to the tail end of the liquid outlet pipe, the dropping pipette is fixedly connected to the lower surface of the funnel pipe, a fixing pipe is fixedly connected to the upper surface of the liquid storage funnel, and a threaded hole is formed in the upper surface of the fixing pipe. And a lifting screw rod is movably inserted into the threaded hole, a fixed connecting rod is fixedly connected to the end, located in the fixed pipe, of the lifting screw rod, a conical block is fixedly connected to the tail end of the lifting screw rod, and a conical plug is fixedly installed on the lower surface of the conical block and located in the funnel pipe. In the using process of the dropping funnel, the dropping funnel can avoid blocking of dropping liquid, and ensures normal proceeding of dropping liquid reaction.

The utility model discloses a new-old asphalt double-layer composite sample preparation device in a dynamic shear rheological test, which relates to the technical field of asphalt tests and comprises a base, and two moving plates are slidably arranged on the top surface of the middle of the base; a mold buckle is arranged on the movable plate; the movable plates are rotationally connected with the movable plates, when the two movable plates are in a horizontal state, the other ends of the two movable plates are connected, and when the two movable plates are in a vertical state, the positions of the molds on the two movable plates correspond to each other; a support is arranged on the base, and the dropping funnel is arranged on the support. According to the device disclosed by the utility model, when the movable plate is horizontally fixed, the thickness and the flatness of a sample are ensured by controlling the amount of asphalt dripped into the mold; when the movable plate is vertically attached to the movable plate, the movable plate is pushed through the handle, then the mold on the movable plate is driven to horizontally move along the sliding rail on the base, accurate sample overlapping is completed, it is guaranteed that the thickness of a test piece is accurate, the surface of the test piece is smooth and observable, and the device is simpler in structure.

The utility model belongs to the technical field of chemical production, and discloses temperature-controllable concentrated sulfuric acid diluting equipment which comprises a double-layer glass kettle (4), a glass kettle cover (11), a bracket (2) and a high-low temperature all-in-one machine (6), and the double-layer glass kettle (4) is supported in the middle of the bracket (2). According to the technical scheme, the constant-pressure dropping funnel is used for controlling the dropping rate of the concentrated sulfuric acid, the temperature-controllable high-low temperature all-in-one machine is used as a cooling source for cooling the concentrated sulfuric acid in the diluting process, and the speed regulating box is used for controlling the rotating speed of the stirring motor, so that heat in the diluting process of the concentrated sulfuric acid can be instantly transmitted and transferred; the temperature in the dilution process can be controlled to be below 5 DEG C, the dilution condition of concentrated sulfuric acid when an organic solvent serves as a diluent is met, and the safety in the dilution process is remarkably improved.

The utility model belongs to the technical field of constructional engineering, and discloses a silicon-hydrogen content testing device which comprises a magnetic stirrer, a reaction mechanism is arranged at the top end of the magnetic stirrer, and the reaction mechanism is attached to the top end of the magnetic stirrer; the reaction mechanism comprises a pear-shaped flask, a magnetic stirrer in the magnetic stirrer is located at the bottom end of the inner wall of the pear-shaped flask, the top end of the pear-shaped flask is communicated with a constant-pressure dropping funnel, the tail ends of the silicone tubes are communicated with a gas sampling measuring tube, and the tail ends of the other group of silicone tubes are communicated with a leveling bottle. According to the utility model, gas is released through the reaction of an object to be measured and alkali liquor, water is pressed into the gas measuring pipe, the volume of the released gas can be measured through the liquid level difference of two times, and the content of silicon and hydrogen in the object to be measured can be calculated. Therefore, the detection data can be more intuitively recorded, the accuracy of the data in the detection process is guaranteed, and the chemical reaction is more sufficient in the chemical reaction process.

This invention discloses a bidirectional coupled pressure-driven injection-production development method, relating to the field of oil production technology. The method includes the following steps: Step 1, selecting a suitable development well area for coordinated injection and production; Step 2, determining the optimal injection volume and injection rate for water well pressure-driven injection; Step 3, determining the optimal injection volume and huff-and-puff design for high-pressure expansion in production wells; Step 4, implementing coordinated injection and production, establishing an effective balanced displacement relationship. This bidirectional coupled pressure-driven injection-production development method, on the one hand, implements slug-type pressure-driven water injection at the injection end to achieve the goals of increased injection, displacement, and wave expansion; simultaneously, on the other hand, it synchronously and synergistically implements high-pressure expansion huff-and-puff with active water at the production end to achieve synergistic expansion, energy replenishment, increased permeability, and improved oil washing efficiency and seepage capacity, preventing water channeling in the pressure drop funnel, and avoiding the surge of pressure-driven injected water along the principal stress direction and the direction of historical displacement strength, as well as fracture channeling.

The utility model discloses a dropping funnel storage rack for a laboratory. Comprising a base, a vertical plate, a fixing plate, a sliding fixing plate and a clamping groove. And the piston bayonet for placing the constant-pressure dropping funnel piston is arranged on the fixed plate, so that the piston is separated from the pipe wall of the dropping funnel, and the piston is prevented from being adhered to the pipe wall due to long-time placement. Due to the fact that the sizes of the dropping funnels are different, the sliding fixing plate can slide up and down, and the dropping funnels of different sizes for laboratories can be placed.

The application provides a defoaming drop funnel assembling device, which comprises a mechanism for assembling a drop funnel body of a defoaming drop funnel and a two-way pipe, and a workbench, wherein the driving mechanism can drive the rotating plate to rotate, the fixed plate is above the rotating plate and is static relative to the workbench, a plurality of storage fixtures are arranged on the rotating plate in a circumferential direction, a drop funnel cover loading station, a shunt umbrella assembling station, a drop funnel body and drop funnel cover assembling station and a finished product transfer and unloading station are sequentially assembled on the upper surface of the workbench along the circumferential direction of the rotating plate, and a claw type glue coating station is assembled on the fixed plate and is arranged in correspondence with the drop funnel cover loading station. The defoaming drop funnel assembling device can quickly and efficiently assemble the drop funnel body, the two-way pipe, the drop funnel cover and the shunt umbrella, and the assembled product has stable structure and high durability.

The invention provides an experimental device and method for simulating an inclined drilling water pumping experiment, and relates to the field of hydrogeology, and the experimental device comprises a sand box part, a water tank part, a pressure measuring pipe part and a water pumping well part. The sand box part simulates an aquifer, and simulation of stratigraphic space distribution in an actual situation is realized by controlling the size and combination relation of filler particles in an experiment; the water tank part adjusts water levels at two ends of the sand box and controls the flowing state of underground water in the sand box by adjusting the relative height of the water tanks on two sides; the piezometric tube part measures the water head pressure at different positions of the aquifer in the sand box and depicts the flow field of the sand box in the water pumping experiment; according to the pumping well part, a water pump and a filter pipe form drill holes with different inclination angles according to different experimental purposes. The experiment device can be used for obtaining the water level change rate in the water-bearing layer and the scale of the falling funnel when the water pumping experiment is carried out by drilling holes with different inclination angles, and can monitor the disturbance condition of the flow field in the experiment in real time.

The application discloses a kind of composite seed metering device, comprising: shell, with installation space, installation space top is equipped with inlet, installation space side is equipped with installation opening, installation space two opposite side walls are equipped with the rotating hole of alignment, shell bottom is equipped with with installation space communication's drop funnel;Movable cover, movable installation in the side of shell corresponding installation opening, with cover installation opening's installation state and open installation opening's open state;Shaft core component, detachable installation in shell and can be rotated along rotating hole activity, including roll core;Limiting structure, connect to shell, for the limiting of movable cover in installation state.The setting of the present application movable cover makes that shaft core component can be quickly disassembled and replaced through installation opening, without overall replacement seed metering device, greatly reduce the time and labor intensity of replacement operation, also can quickly replace roll core and realize the seeding operation of different crops.

A tobacco product oscillation extraction device relates to the technical field of tobacco product pretreatment and comprises an oscillator body and a clamping device used in cooperation with the oscillator body. The clamping device comprises a pair of fixing seats fixed on two sides of the oscillation table, a plurality of horizontal guide rail groups are arranged between the pair of fixing seats in a crossing mode, and each horizontal guide rail group is composed of a pair of parallel horizontal guide rails. The horizontal guide rail set further comprises a plurality of clamping rods, the two ends of each clamping rod are connected with a pair of parallel horizontal guide rails in a sliding mode respectively, and the clamping rods can slide in the length direction of the horizontal guide rails. And a sponge sleeve is sleeved outside the clamping rod. During use, every two clamping rods can clamp a container from the two sides of the container, and the sponge sleeve deforms under pressure and can adapt to containers of various sizes. Meanwhile, a plurality of horizontal guide rails are matched for use, and a plurality of clamping points in the height direction can be provided for the container, so that the clamping device is adaptive to containers in various shapes such as test tubes, conical flasks and dropping funnels, and the clamping device has better universality.

The invention discloses a floating valve liquid-stopping infusion apparatus easy to exhaust, which comprises an infusion pipeline, one end of the infusion pipeline is provided with a bottle stopper puncture outfit, the infusion pipeline is sequentially provided with a drip chamber, a flow regulator and a liquid medicine filter along the infusion direction, the drip chamber is internally provided with a liquid-stopping floating valve, and the liquid-stopping floating valve is provided with a hollow shell. The bottom of the shell is provided with a liquid stopping diaphragm for sealing a liquid outlet of the drip chamber, the liquid outlet of the drip chamber is provided with a liquid stopping base matched with the liquid stopping diaphragm, and the center of the liquid stopping base is provided with a liquid passing channel communicated with the liquid outlet of the drip chamber; and a breathable water-blocking assembly matched with the liquid-stopping floating valve is arranged on the dripping bucket. The hollow shell is arranged, so that the buoyancy is large enough; by arranging the breathable water-blocking assembly, gas in the drip chamber can be discharged easily, the height of the floating valve can be controlled, and clinical use is facilitated.

The invention provides a preparation method of a low-cost cyclotriphosphazene flame retardant, which comprises the following steps: weighing aniline, dissolving in ethylene glycol dimethyl ether in a beaker A, and weighing triethylamine in a beaker B; weighing phosphonitrilic chloride trimer, and dissolving phosphonitrilic chloride trimer in ethylene glycol dimethyl ether in a beaker C; pouring the solution in the beaker C into a three-necked flask, introducing condensate water, installing a dropping funnel on one neck, sealing the other neck with a glass plug, setting the water bath temperature to be 50-65 DEG C, and starting to heat; the solutions in the beakers A and B are poured into a dropping funnel, dropping is started when the temperature reaches 50-65 DEG C, timing is conducted, heating and stirring are stopped after the reaction is completed, and a reaction device is closed; after the three-necked flask is cooled to the room temperature, a reaction system in the three-necked flask is subjected to reduced-pressure suction filtration, filtrate obtained after suction filtration is dried, impurities are removed, then drying is conducted again, the cyclotriphosphazene flame retardant is obtained, the cyclotriphosphazene flame retardant has good expansion performance and flame retardant performance, and experimental data are provided for further improving the flame retardant performance of a green expansion type flame retardant.

The present invention relates to a method for rapidly synthesizing 1,3-diaminothiourea by a one-pot method. A thermometer, a dropping funnel and a piston with a conduit are equipped on a four-necked flask. A certain amount of ammonia water with a mass fraction of 10%, hydrogen peroxide solution with a mass fraction of 5% and mercaptoethanol are added to the four-necked flask. Carbon disulfide is added to the dropping funnel. The four-necked flask is placed in an ultrasonic reactor, and the ultrasonic frequency is set to 60-65 kHz, the power is 400 W, and the heating temperature is 40 °C. When the temperature of the materials in the flask reaches 40 °C, carbon disulfide is started to be dropped, and at the same time, ultrasonic-assisted reaction is started. After the reaction is completed, it is naturally cooled to room temperature, and the product is filtered to obtain the crude product of 1,3-diaminothiourea. The finished product of 1,3-diaminothiourea is obtained after purification and drying. The present invention uses ultrasonic radiation-assisted reaction and can rapidly and efficiently synthesize 1,3-diaminothiourea by a one-pot method, solving the defects of long synthesis time, high reaction temperature, harsh conditions and low yield in the prior art.

This utility model relates to the field of dripping device technology, specifically to a large-volume constant-rate dripping device. The device includes a dripping funnel, a connecting tube, and a storage tank. The dripping funnel comprises a funnel body and a dripping tube connected to the bottom of the funnel body. The top of the funnel body has an inlet, and the bottom side has a replenishment port. A stopper is provided on the inlet. The replenishment port is connected to an outlet on the lower side of the storage tank via the connecting tube. The storage tank is located above the replenishment port, and the vertical distance H between the bottom of the storage tank and the replenishment port is 1. A knob is provided on the dripping tube. Using this large-volume constant-rate dripping device, in practical applications, it can overcome the shortcomings of current dripping funnels, such as uneven dripping rate and low capacity, thereby improving the uniformity of chemical reactions, ensuring the controllability of the reaction, and enhancing the repeatability, accuracy, and efficiency of experiments.

The utility model belongs to the technical field of conical drip chambers, and particularly relates to a conical drip chamber which comprises a conical drip bottle, a drip chamber upper cover fixedly installed at the top of the conical drip bottle, a flow dividing disc fixedly installed at the bottom of the drip chamber upper cover and located in the conical drip bottle, an air inlet box fixedly installed on the flow dividing disc, and an air inlet seat arranged in the air inlet box. An air inlet pipe fixed to the drip chamber upper cover is fixedly installed in the air inlet seat, an air inlet hole is formed in the air inlet seat and located below the air inlet pipe, and an air filtering film is fixedly installed in the air inlet seat and located at the bottom of the air inlet hole. The round rod is installed in the air inlet pipe in a sliding mode, the top end of the round rod penetrates through the top of the air inlet pipe and the upper cover of the drip chamber and is fixedly provided with an air inlet valve, air can enter an inner cavity of the conical drip bottle by pressing the air inlet valve, impurities in the air can be prevented from entering the conical drip bottle, the liquid inlet amount can be accurately controlled, and the liquid inlet amount can be accurately controlled. Meanwhile, liquid uniform mixing is completed to a certain extent.

The utility model discloses a rotary evaporator which at least comprises a gas-guide tube with a first end and a second end, a condenser communicated with the first end of the gas-guide tube, a dropping funnel communicated with the bottom of the condenser, an evaporation bottle communicated with the second end of the gas-guide tube, a first switch valve and a second switch valve, the plurality of nozzles are sequentially arranged in the dropping funnel in the height direction; the rotating piece is rotationally installed on the peripheral side of the second end of the air guide pipe in a threaded mode, the blocking assembly is arranged at the second end of the air guide pipe, and the blocking assembly ascends at the second end of the air guide pipe along with the rotating piece to open the second end of the air guide pipe. The second end of the gas-guide tube is blocked along with the descending of the rotating piece at the second end of the gas-guide tube; according to the utility model, the problem that the evaporation bottle needs to be vacuumized for the second time due to the fact that the vacuum environment in the evaporation bottle is damaged when the rotary evaporator is subjected to segmented sampling can be solved.

The utility model relates to the technical field of food determination test, and in particular to a device for determining the amount of carbon dioxide gas generated. A first bottle mouth is provided on the top of a gas generating flask, and a second bottle mouth which is inclined is provided on the front side thereof. A first rubber plug is movably provided in the first bottle mouth, and a second rubber plug is movably provided in the second bottle mouth. A dropping funnel is provided on one side of a condenser. Automatic stirring can be achieved through a heat-collecting magnetic stirrer, so that the convenience of use is improved, and the temperature can be kept constant, so that the determination accuracy is improved. By passing the liquid outlet end of the dropping funnel and the air inlet end of the condenser through the first rubber plug, an installation connection with the gas generating flask is formed, so that frequent disassembly and separation are not required, so that the structural stability and sealing degree are improved, leakage is prevented, and the test reliability is improved. Water and a sample are added to the gas generating flask from the second bottle mouth, and the second bottle mouth is sealed by the second rubber plug, so that the effect of rapid feeding can be achieved, and the determination accuracy is improved.

The application relates to an assembling device of a drip cup automatic assembling machine, which comprises a puncture device clamping mechanism, a drip cup rotating assembly and a drip cup glue adding mechanism, the drip cup rotating assembly comprises a drip cup rotating motor and a drip cup rotating cylinder, drip cup rotating clamps are installed on the piston rods on the two sides of the drip cup rotating cylinder, the drip cup rotating cylinder drives the two drip cup rotating clamps to clamp the drip cup, and the drip cup rotating motor drives the drip cup rotating cylinder and the drip cup to rotate. Compared with the prior art, the application realizes automatic glue adding of the drip cup and automatic installation between the puncture device and the drip cup, greatly improves the assembling speed and production efficiency, and reduces the possibility of pollution of the drip cup assembly; the drip cup is rotated and glued at the same time, glue is fully and uniformly coated on the puncture device end of the drip cup, glue accumulation and overflow are prevented, pollution of the drip cup is avoided, and firm installation between the drip cup and the puncture device is ensured.

The present application relates to the technical field of hydraulic fracturing method, and is an alternating pulse injection method for promoting proppant grouping, which comprises uniformly stirring A agent with proppant and injecting into the formation, and B agent is a slow-release promoter which is injected into the formation together with fracturing fluid in the preflush and mid-top fluid stage. The alternating pulse injection method for promoting proppant grouping can improve single well production by 20% to 90%, eliminates the loss of flow conductivity caused by residue blockage and proppant embedding, thereby reducing the pressure drop funnel effect near the wellbore and improving the fracturing reconstruction effect; and a centimeter-level high-flow channel is established, which greatly improves the flowback rate and flowback speed and reduces the risk of sand plugging during construction.