98results about How to "Precise volume control" patented technology

The invention provides an integrated droplet microfluidic chip structure. All functional modules of droplet generation, amplification and detection are integrated on the same microfluidic chip to achieve the whole enclosed process from the droplet generation to fluorescence detection. The invention also relates to an integrated droplet microfluidic chip structure preparation method and a microfluidic chip assembly. The structure is compatible with the positive pressure or negative pressure drive mode, the pressure response time is short, the rapid droplet generation can be achieved, and the sample preparation time is greatly reduced. Droplet generation oil is not required to be filled in advance, the operation is simple, and popularization and application in the technical field of digitalPCR are facilitated.

The invention discloses a multi-phase honeycomb ceramic and steel composite material and a preparation method thereof. The composite material uses steel as matrix and multi-phase honeycomb ceramic as enhanced phase, and adopts a casting method to composite the matrix and the enhanced phase into one; when manufacturing, firstly, surface pretreatment is carried out on ZrO2-Al2O3 multi-phase honeycomb ceramic; secondly, ZrO2-Al2O3 multi-phase honeycomb ceramic is fixed in a sand mould; and finally, smelted steel metal liquid is cast into a casting mould, and the multi-phase honeycomb ceramic and steel composite material are obtained after cooling and solidification molding. The composite material has low cost, good abrasive resistance and toughness, is mainly used for crushing materials in the fields of metallurgy, building materials, mines, refractory materials and electric power and the like and grinding wear-resistant parts of equipment.

A kind of integrated cold head is used to the coaxial vas freezer and the cold head is made of the high heat conductivity material and at the bottom along the outside around there is a flanged edge used to weld with the shell of storage cold equipment and in the middle of it opens a round hole and around of the round hole opens radial gap uniformly and the depth of gap is the same with the depth of round hole and there is coaxial opening a ring conduit used to the vas of freezer for inserting. The vas adapts with the inserted ring conduit tightly and the cold head adapts with the shell of storage cold equipment tightly and the flanged edge of cold head welds with the shell of storage cold equipment. So the outside of the ring conduit is the storage cold equipment's cold end gas uniform equipment and the inside of the ring conduit is the vas's cold end gas vane. And the gas in the storage equipment and the vas is conducted by the gap of the bottom of integrated cold head. The maxim merit of it is that: the heat exchange area is large and the affection of guiding flow is well and the points of welding are little and it can deliver the quantity of refrigeration of the vas freezer to the outside face of cold head effectively so it improves performance of the coaxial vas freezer largely.

The invention relates to a medical instrument, and especially relates to a multifunctional full-automatic cell and solution treating instrument. The instrument comprises an ultrafilter, a liquid storage container, a peristaltic pump, an electromagnetic valve mixer and a temperature controller, wherein special components in a cell suspension or solution are displaced by a method of instillation combined with ultrafiltration and dialysis, or the cell suspension or solution is diluted and concentrated to desired final volume through accurate control. The multifunctional full-automatic cell and solution treating instrument effectively overcomes the shortages of the existing related treatment methods in the aspects of causing damage of cells, possibly causing cell pollution, taking long time, and low efficiency and the like; and the multifunctional full-automatic cell and solution treating instrument is capable of adding or removing a low-temperature protector quickly and steadily without pollution, and also capable of controlling the volumes and the temperatures of the cell suspension and the solution quite accurately and reducing various cell damages possibly caused in the treatment process. The multifunctional full-automatic cell and solution treating instrument has the advantages of small volume, simple structure, little time consumed and high controllability, and is convenient to operate.

The invention belongs to the technical field of sample sampling and discloses an automatic quantitative sampling device which is applied to the technical field of radioactive sample sampling. The device mainly comprises a conductive liquid level control system and a sampling system, wherein the sampling system comprises a vacuum pump, a buffer bottle and a graduated vessel; the vacuum pump is connected with the buffer bottle and the graduated vessel in sequence so as to pump the sampling system into negative pressure. The graduated vessel is internally provided with two electrodes. A target solution is pumped into the graduated vessel under the action of negative pressure. When the liquid level in the graduated vessel reaches the high electrode, the two electrodes are powered on, and a signal controller can control corresponding solenoid valves to be turned on or turned off after receiving signals. The automatic quantitative sampling device has the advantages of being simple in structure, high in quantitative accuracy and capable of continuously and automatically transferring and sampling a sample solution.

The invention provides a device and a method for playing sound, in particular relates to a device for playing sound, which comprises a sound detecting module, a conversion module, a control module and an output module, wherein the sound detecting module is used for acquiring sound related to background environment so as to generate a background sound signal; the conversion module is coupled with the sound detecting module and is used for converting the background sound signal into a background sound source value; the control module is coupled with the conversion module and is used for adjusting the volume of a sound source signal according to a preset mode and the background sound source value so as to generate an output signal; and the output module is coupled with the control module and is used for playing the output signal. The device and the method for playing sound can automatically adjust the volume according to the background environment, thereby improving the convenience of users.

The invention relates to the manufacturing technology of a microelectronic mechanical system and provides a manufacturing method for a size-controllable wafer level glass micro-cavity. The invention adopts the following technical scheme: the manufacturing method for the size-controllable wafer level glass micro-cavity comprises the following steps: etching on a silicon wafer to form a micro groove array; adding a sodium carbonate solution and a calcium chloride solution successively into the micro silicon groove, and steaming to finally obtain calcium carbonate; bonding a glass wafer with the silicon wafer under the vacuum condition or a certain pressure to seal the micro silicon groove; heating the bonded glass wafer and silicon wafer to be above the glass softening point temperature, thermally insulating, after glass corresponding to a sealed cavity body is formed by a positive pressure generated by gas discharged from the calcium carbonate in the micro groove, cooling to the normal temperature, and annealing; and removing the silicon wafer to obtain a wafer level spherical glass micro-cavity array. According to the manufacturing method, the content of the calcium carbonate can be accurately controlled, the glass micro-cavity with the size of ten submicrons and even submicron or the like can be manufactured, and an ultra-clean chamber is not influenced.

The invention discloses an information processing method and electronic equipment, and aims at solving the technical problem that in the prior art, the control on the sound volume is not precise enough. The method is applied into the electronic equipment, and comprises the following steps that when a first operation instruction is received, whether a first audio frequency parameter of the electronic equipment meets a preset condition or not is judged, and a first judging result is obtained, wherein the first operation instruction is an operation instruction used for regulating the first audio frequency parameter; when the first judging result shows that the first audio frequency parameter meets the preset condition, the first operation instruction is converted into a second operation instruction, wherein the second operation instruction is used for regulating the second audio frequency parameter of the electronic equipment. Different modes can be adopted on the basis of different application environments for controlling the sound volume of the electronic equipment, so the technical effect of more precisely controlling the sound volume is achieved.

The invention discloses a cubage segmentation-typed liquid-injection and a sealing method for a silicon-based micro-heat pipe. By twice precise cubage segmentation to an enclosed space consisting of the silicon-based micro-heat pipe and an injector, little working liquid is taken out of the working liquid and the air in the sealing space; furthermore, two fine metal pipes used for connecting the liquid injection holes are sealed so as to retain the liquid in the micro-heat pipe, thus precisely controlling the charge liquid proportion of the micro-heat pipe. As the whole process is carried out in an enclosed small space, the liquid is isolated from the environmental air during the whole operation process, thus ensuring the working efficiency of the micro-heat pipe. The method avoids the step of vacuuming, and only requires two injectors and a heating device for the operation; the usage amount of the silicone sealant and the working liquid is small; the control method is simple, requiring only the heating temperature and the calibration of the injector to be adjusted; and the sealing is safe.

The invention discloses an oil bath type coal temperature programming experiment device based on a dynamic oxygen environment. The experiment device comprises a dynamic gas distribution system, a coaltemperature programming system, an automatic quantitative gas sample collecting system and a gas sample data analyzing system, wherein the dynamic gas distribution system is provided with a high-pressure oxygen cylinder and a high-pressure nitrogen cylinder; the coal temperature programming system comprises a preheating copper tube, silicone oil, a stirrer, a heating ring, a coal sample tank, a thermocouple, a multi-point temperature recorder and a temperature controller; the automatic quantitative gas sample collecting system is provided with a purifying pipe, an automatic quantitative sampler and a time delayer; the gas sample data analyzing system is provided with a G2800T gas chromatograph, a G3800F gas chromatograph, a methane converter and a data processing computer. The oil bath type coal temperature programming experiment device has a reasonable design and convenience in operation, can provide temperature programming environments with different oxygen concentrations for coal samples and can make all parts of the coal samples be evenly heated; thus, experiment precision and data result accuracy are improved, an operation process is simplified, and experiment time is shortened.

The invention relates to a thyroid puncture device, and belongs to the technical field of medical tool structures. The thyroid puncture device comprises an injector; a needle body in which a needle core is mounted is connected to the front of the injector; an one-way valve is arranged at an inlet of the injector; a pushing handle is arranged in the injector; a negative pressure pipe equipped with a piston is fixedly mounted at one side of the injector, and while a fluid storing bottle is mounted at the other side of the injector. According to the thyroid puncture device, the negative pressure pipe is arranged and can generate sufficient negative pressure to absorb cyst fluid, and the absorbed cyst fluid is enough for diagnosis; the liquid storing bottle is arranged, so that cyst fluid can be extracted at a plurality of times; the cyst fluid can be smoothly extracted in case of thick fluid or solid nodule mass; in addition, scales in the fluid storing bottle are able to accurately control the volume of the fluid extracted, which greatly facilitates the diagnosis and treatment of diseases.

The invention discloses a medical examination sampling device. The medical examination sampling device comprises a bottle rack, a bottle body, a bottle plug, a sampler, a vacuumizing apparatus, a light shield, an intelligent reading device and a bottom cup, wherein a bottle cap is arranged at the upper end of the bottle body; the sampler and the vacuumizing apparatus penetrate through the bottle plug and go deep into the interior of the bottle body; the bottle body is put on the bottle rack; the light shield is arranged outside the bottle rack; the intelligent reading device is arranged at the middle of the upper part of the bottle body; the bottom cup is arranged at the lower part of the bottle rack; the sampler is used for adsorbing sampling liquid by rotating a sampling stem, and the volume of the sampling liquid is accurately controlled by finely adjusting the stem; a lens arranged on the outer layer of a graduated tube can be used for amplifying and displaying scales, and the lens is convenient and accurate to use. The medical examination sampling device is simple in structure and convenient in operation, and the vacuumizing apparatus is free of cleaning, so that the residual of virus or infectious microbe is avoided, and the quality of a check sample is guaranteed; the scales are arranged on the bottle body, and direct quantification can be realized during the liquid adsorption process, so that the sampling accuracy is improved, and the medical examination sampling device has higher popularization and application values.

The invention discloses a polarization chamber system based on a hyperpolarization gas and a use method thereof. The polarization chamber system comprises three parts, wherein a first part is used for conveying alkali metal steam and a second part is used for mixing the alkali metal steam with 3He and N2 gases conveyed by a third part in a polarization chamber, polarizing in the manner of heating by a heating furnace in a magnetic field and lastly, conveying the highly polarized 3He gas into a storage bag through a capillary glass tube and a spiral filtering pipe. The system provided by the invention can overcome the defect that the traditional polarization chamber only can be used for one time; the polarization chamber system is reusable; the repeated filling of 3He and N2 gases can be realized, once alkali metal filling can be tested repeatedly and the volume of the gas filled into the polarization chamber can be accurately controlled by the intelligent control on the opening / closing of a gas flow meter and a solenoid valve, so that the gas waste is greatly reduced and the operation steps are simplified.

Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.

The invention relates to an energy-saving electric control valve and an electric control fuel system. The energy-saving electric control valve comprises a shell, a driving source, a guide rod, a firstvalve element, a second valve element and a compressible component. The electric control fuel system comprises a fuel tank, a liquid level sensor, a pressure sensor, a carbon tank and a controller. The liquid level sensor, the pressure sensor and the energy-saving electric control valve are all in electric signal connection with the controller. A first connecting port in the energy-saving electric control valve is connected with an exhaust port in the fuel tank, a second connecting port is connected with an air inlet in the carbon tank, a third connecting port is connected with an atmosphericpipeline, and a fourth connecting port is connected with an exhaust port in the carbon tank. According to the energy-saving electric control valve and the electric control fuel system, with the energy-saving electric control valve, communication between the fuel tank and the carbon tank is cut off, it is avoided that oil vapor enters the carbon tank and causes overlarge load of the carbon tank, and less environmental pollution is caused; and the opening degree of a channel can be controlled by controlling the moving distance of a driving source, and the volume is accurately controlled in theprocess of filling and supplementing fuel oil.

The invention relates to a vulcanization molding method for a rubber sole. The method is characterized by including the following steps of: (1). conducting quantitative ejection, firstly calculating the volume amount of rubber consumed for making a sole product, leading the volume amount of rubber material into an ejection machine in advance to conduct ejection molding, thus obtaining a blank with a precise volume amount and a temperature reaching a first molding temperature; (2) placing a hot blank, taking out the high temperature state blank and quickly putting into a shoe mould; (3) carrying out molding in the mould, closing the shoe mould and performing heating and pressurizing, molding the blank into a first sole according to the mould cavity shape, meanwhile raising the first molding temperature to a second molding temperature during heating of the blank so as to achieve vulcanization molding of the rubber sole; and (4) taking out the finished product.

The invention discloses hot rolled steel for rims, with tensile strength of 560-590MPa and a preparation method thereof, belonging to the technical field of rolled steel. The hot rolled steel and the preparation method have the technical effects that a process of subsection cooling after hot rolling is adopted, the sizes and volume fractions of ferrite, bainite and martensite in the structure are accurately controlled, the tensile strength of the steel is improved via bainite and martensite phases in the structure and the residual stress of a steel strip is reduced and the elongation of the steel is improved by controlling the sizes and volume fractions of ferrite grains and adopting multistage air cooling; the hot rolled steel for rims has tensile strength of 560-590MPa, elongation (A5) of 34-36% and thickness specification of 6.0-7.0mm and is suitable for manufacturing rims of heavy duty automobiles.

The invention discloses electric mixing equipment, and relates to the technical field of fracturing construction equipment. The electric mixing equipment comprises a mixing tank, a discharging structure, a suction structure, a powder tank, an electric control chamber, a stirrer, a spiral conveyor, a high-energy mixing structure and a diffuser, wherein the diffuser is arranged on the mixing tank; asuction opening and a discharging opening are respectively formed in the left end and the right end of the mixing tank; the discharging structure is arranged at one side of the mixing tank; the suction structure is arranged at the other side of the mixing tank; the suction structure communicates with the suction opening of the mixing tank through the diffuser; the discharging structure and the suction structure are respectively and electrically connected with the electric control chamber; the high-energy mixing structure is arranged on the suction structure; the lower part of the powder tankcommunicates with the high-energy mixing structure through the spiral conveyor; and the stirrer is arranged inside the mixing tank. The electric mixing equipment has the advantages that the quality ofthe mixing liquid is greatly improved, and the fast proceeding of the mixing operation is effectively ensured.

The present invention discloses a device that can suspend objects in intense magnetic field with large grade and is used for suspending fluid or solid state diamagnetic material and for making the diamagnetic material be sealed in an environment that is sealed and can be heated or cooled and whose temperature is controllable and is observable at any time so as to realize processing of the diamagnetic material in the states of zero gravity no-container and suspension, the present invention comprises a suspension cavity 5, a sample feeding controller 8, a temperature controller 6 and a video pick-up device 2, etc. The suspension cavity is a sealed cavity and can prevent outside environment from polluting the suspension material and prevent the volatilization of fluid sample. Besides, the suspension of the solid diamagnetic sample that is arranged in the suspension cavity can be realized through changing the position of the suspension cavity 5 in the magnet test cavity; the sample feeding controller 8 can realize precisely control the suspension of the fluid diamagnetic sample; the temperature controller 6 can realize heating or cooling of the sample and precision control of the processing temperature of the sample; the video pick-up collector 2 can realize real-time observation and recording of the process of the sample processing.

The invention relates to the field of animal husbandry, in particular to an efficient disinfectant preparation device for animal husbandry, which comprises a shell, a mixing box is arranged on the inner side of the shell, a supporting mechanism is arranged between the mixing box and the shell, a discharging mechanism is arranged on the upper side of the mixing box, and a water injection mechanismis arranged on the left side of the discharging mechanism. The motor can drive the outer rod to rotate through the inner rod, the outer rod drives the stirring rod to rotate so that deionized water and a medicament can be fully mixed, the inner rod can drive the outer rod to rotate at the same time, the outer rod drives the cam to rotate so as to push the movable plate to rotate, and the mixing box moves up and down repeatedly under the action of the movable plate and the first spring. By arranging the water injection mechanism, the volume of the deionized water can be accurately controlled, and by arranging the discharging mechanism, the discharging amount of the medicament can be accurately controlled, so that the concentration accuracy of the finally prepared disinfectant is high.

The invention relates to a portable pesticide residue detection device and method, which are used for solving the problem that the existing pesticide monitoring device is not easy to carry. The portable pesticide residue detection device of the present invention comprises: a base provided with a rotating table and a sample placing part; the fixed seat is mounted on the rotating table and can horizontally rotate relative to the rotating table; the plurality of detection assemblies are detachably mounted on the fixed seat and synchronously rotate along with the fixed seat; the detection assembly is provided with a liquid storage cavity for storing a reagent for detecting pesticide residues; the detection assembly is provided with a liquid outlet communicated with the liquid storage cavity, the detection assembly rotates for a circle along with the fixed seat, and the liquid outlet passes through the upper part of the sample placing part at least once, so that the reagent can drop to a sample placed in the sample placing part.

The invention provides a detection and absorption device for SF6. SF6 enters a closed tank of a mineral oil content measuring unit and filtered by a filter membrane, and a product is discharged into an SF6 acidic material absorption unit; a motor controls an injector to inject a CCl4 solution into the closed tank, CCl4 mist spray is formed by a first atomizer, mineral oil in the filter membrane is eluted, an eluent is discharged into a detection tank, elution is stopped when content change of the mineral oil in the eluent tends to be stable, and a liquid in the detection tank is subjected to volume fixing with the CCl4 solution; after the volume fixing is finished, detection work is completed with an infrared light source and an infrared detector; for SF6 discharged from the closed tank, SF6 acidic materials make sufficient contact with an NaOH solution and are absorbed completely by aid of an NaOH solution circulating module and a gas circulating module assisted by a second atomizer and a gas spray nozzle. The detection and absorption device can measure the content of the mineral oil in SF6 accurately and sufficiently absorb the acidic materials in SF6 and is excellent in working performance.

The invention provides a hydrogel-based digital PCR chip, and an application method thereof. The hydrogel-based digital PCR chip comprises a micro hydrogel array, a polymethyl methacrylate cover plate, a double faced adhesive tape interface layer, and a glass substrate; the micro hydrogel array contains 2300 to 46000 micro gel units; the volume of each freeze-dried micro gel unit ranges from 0.2 to 5 nano-liters. According to the application method, when a nucleic acid sample solution flows through the micro hydrogel array, the nucleic acid sample solution is absorbed, dispersed, and retainedin each of the micro gel units, and sealing oil is introduced into the system for complete isolation of the reaction system. The hydrogel-based digital PCR chip is novel in design, is convenient to prepare, is low in cost, is high in biocompatibility, is convenient in operation, and is wide in suitable range.

The invention belongs to the technical field of electrowetting display, and provides an electrowetting printing ink filling method, filling device and filling apparatus. The filing method includes the steps of: S1. preparing a filling device having array type microneedles and a lower substrate having pixel grids; S2. filing an inner cavities of the microneedles with printing ink; S3. moving the filing device or lower substrate, and aligning the microneedles with the pixel grids; and S4. pressurizing the inner cavities of the microneedles to enable ink droplets to be formed at needle tips till the ink droplets drip from the microneedles into the pixel grids or the ink droplets are in contact with the lower substrate and adsorbed into the pixel grids. The filling device has an accommodating cavity and a microneedle array. The filing apparatus includes a filing device, a filling device travel mechanism, a workbench, a workbench travel mechanism and a distance measuring positioning module. The method adopts the filling device having the large-area microneedle array, can accurately control the volume of fluid in the microneedles, and realizes positioning of an ink layer and quantitative filling through rapid alignment simulated printing.

The invention discloses a hot rolled spoke steel with the yield ratio of 0.45-0.49 and tensile strength of 630-670 MPa and a manufacturing method thereof, and belongs to the technical field of steel rolling. A sectional type cooling process conducted after hot rolling is adopted, the sizes and volume fractions of ferrite and a martensite island are accurately controlled, and a hot rolled dual-phase steel belt with the yield ratio of 0.45-0.49 and tensile strength of 630-670 MPa is provided. The thickness of the steel belt is 2.5-4.0 mm, the percentage elongation of the steel belt is 26-29%, and the steel belt is applicable to the manufacturing of a stamped spoke.

The invention provides an automatic volume adjusting system and method of a mobile phone, and relates to the field of mobile phone communication. The automatic volume adjusting system comprises a sound reception module, a sound identification module and a sound adjustment module. The sound reception module receives audio information in the external environment. The sound identification module identifies the intensity of the audio information. The sound adjustment module adjusts the volume, including media volume and call volume, of the mobile phone according to the intensity of the audio information. When the mobile phone is in a non-calling state, the sound adjustment module adjusts the media volume according to the intensity of the audio information in the external environment; and whenthe mobile phone is in a calling state, the sound adjustment module adjusts the call volume according to the intensity of the audio information in the external environment. The automatic volume adjusting system can adjust the volume automatically according to the audio information in the external environment, and user experience is improved.

The invention discloses a high-flux array type 3D liquid drop printing method. In order to solve the problems that when suspension liquid drops are prepared in a point-by-point printing manner, the printing rate is low, and time consumed by production is long, array type spray heads are adopted, and the printing rate of liquid drops can be effectively improved by increasing the number of array capillary needle heads; in the printing process, micro vibration is applied to the array type spray heads, the shearing effect between liquid drops and a hydrogel matrix can be actively regulated and controlled, the hydrogel matrix is kept not damaged, the array liquid drops are synchronously and uniformly extruded out, and high-flux stable printing of the suspension liquid drops is achieved; and by combining the arrangement spacing of array through holes of the spray heads and pattern design, the sizes and spatial positions of the liquid drops can be accurately controlled, optimal arrangement of the liquid drops is realized, the oil / water phase proportion is improved, and a three-dimensional model with a specific shape is prepared according to actual requirements. The method is simple and easy to implement, can be used for batch production, and has wide application prospects in the fields of foods, medicines, cosmetics and the like.

The invention discloses a micro-area electrochemical analysis device and method for electrochemical migration of an electronic product, and is used for analyzing the occurrence trend of a corrosion electrochemical reaction according to micro-area potential distribution on the surface of a circuit board. The device comprises an electrochemical migration generation device, a closed environment simulation container, a pollution gas presetting system, an air circulation system, a waste gas absorption treatment device and a digital display control panel. The pollution gas presetting device, the environment simulation container air circulation system and the waste gas absorption and treatment device are connected with the environment simulation container through pipelines. According to the invention, the influence of pollution gas, environment temperature and humidity and the like on the electrochemical corrosion process of circuit boards, electronic equipment parts and the like in an actual service environment can be effectively simulated, and real-time in-situ micro-area electrochemical analysis is carried out on the corrosion behavior of the circuit boards, the electronic equipment parts and the like.

The invention relates to a method and a system for detecting radium content in liquid based on automatic control, which are characterized in that a liquid sample is pretreated to obtain an evaporated and concentrated liquid sample, the evaporated and concentrated liquid sample is transferred to a diffuser in a radon gas collecting unit, radon gas collection is performed in a scintillation chamber, and the radon gas is collected in a liquid sample collecting unit; the collected radon gas reacts with a coating substance on the inner wall of the scintillation chamber and generates an optical signal; the detection unit converts the received optical signal into an electric signal and calculates the radium content data in the liquid according to the electric signal; according to the method for detecting the content of the radium in the liquid based on automatic control, separation of precipitation and dissolution is achieved through a magnetic heating rotating table, cross interference is avoided, a radon gas collecting unit and a radon gas detecting unit are combined into a whole, radon gas can be directly measured after being collected, and other operation is not needed. The automation degree of the system is high, and harm of radioactive substances to operators is greatly reduced.

The invention discloses a gun head with a super-oleophobic inner wall, a super-oleophobic outer wall and an oleophylic muzzle platform. The manufacturing method of the gun head comprises the followingsteps of: placing the gun head of a pipette on combustion flame of an atomized silane solution to be combusted to form a silicon dioxide layer; performing soaking in a fluorine-containing silane coupling agent solution to form a fluorine-containing silane layer; and coating the muzzle platform with an ethanol solution containing clay and nano silicon dioxide to form a lipophilic nano silicon dioxide coating. The invention further discloses a pipette comprising the gun head, one end of the gun head is connected with a pipette tube, and the inner cavity of the pipette tube comprises a thin cavity and a thick cavity; an elastic piece is arranged in the thick cavity, a pressing piece is arranged at one end of the elastic piece, a plunger piece is connected to the end, close to the gun head, of the pressing piece, and limiting adjusters used for limiting the pressing piece at different positions are arranged on the gun barrel. The pipette prepared by adopting the preparation method disclosed by the invention can realize rapid measurement of liquid and does not cause liquid residue.