33results about How to "Effective break" patented technology

The invention discloses a direct-casting type anti-track agent, which is formed by the following components by weight in mixing mode: 20 to 40 parts of regenerative polyolefine plastic, 10 to 20 parts of regenerative polyester plastic, 2 to 10 parts of regenerative wax, 2 to 10 parts of organic powder body with small particle size and 5 to 10 parts of gilsonite. A preparation method of the direct-casting type anti-crack agent and a method for preparing asphalt mixture by adopting the direct-casting type anti-crack agent are further disclosed. Particles of the direct-casting type anti-crack agent can be directly cast in hot aggregate on construction sites to be mixed with the hot aggregate in drying mode, intermittent construction can be conducted, and the direct-casting type anti-track agent lowers or reduces probability of separation of modified asphalt in the cooling, transporting and storing processes, and break through limit and restraint brought by continuous production and construction.

The invention relates to an air-breathing photo-assisted biomass fuel cell. The fuel cell can transform optical energy and biomass energy into electric energy through optical excitation. The fuel cell comprises a light window, a liquid storage chamber, sealing washers, an anode fixed plate, an anode diffusion layer, a membrane electrode, a cathode gas diffusion layer, a cathode collector plate and an end plate. The inner sides of the anode fixed plate and the cathode collector plate are respectively provided with the sealing washers. The membrane electrode is arranged between the two sealing washers. The membrane electrode located at one side of the cathode collector plate is provided with the cathode gas diffusion layer. The membrane electrode located at one side of the anode fixed plate is provided with the anode diffusion layer. The outer side of the cathode collector plate is provided with the end plate. The outer side of the anode fixed plate is provided with the liquid storage chamber. The sealing washer is arranged between the liquid storage chamber and the anode fixed plate. The light window is laid in the hollow part of the middle of the front side of the liquid storage chamber. The light window is used as a light entrance port. A photo anode and a fuel solution are arranged in the liquid storage chamber. The fuel cell provides a cheap and eco-friendly novel approach of conversion of solar energy and biomass energy into electric energy.

The invention discloses thermochemical modified starch, a preparation method and a method for preparing an adhesive by using the thermochemical modified starch and relates to modified starch and adhesives prepared by using the starch. The method is used for solving the technical problems of the existing starch adhesives that the water resistance is not ideal, the transportation cost is high, and the starch modification process is complicated. The thermochemical modified starch is prepared through uniformly spraying an acid solution into the starch, carrying out uniform mixing, then, carrying out heating treatment, carrying out baking, carrying out cooling, and then, carrying out crushing. The method for preparing the adhesive comprises the following steps: adding polyvinyl alcohol into a reactor pot with stirring, heating and cooling devices, adding water, adopting a staged-heating method to dissolve the polyvinyl alcohol with stirring, and then, cooling to room temperature; adding the thermochemical modified starch, carrying out stirring at room temperature, and then, adding polymethylene polyphenyl polyisocyanate, thereby obtaining the adhesive. According to the method, by using the technological characteristic that the starch-based adhesive is prepared by only adding the water to the thermochemical modified starch before use, the problem that the traditional solution type starch main agents are low in transportation efficiency and are prone to layering and mildewing is solved.

The invention relates to the field of steel wire straightening, in particular to a steel wire straightener convenient to maintain. The steel wire straightener comprises a workbench, a left side straightening component and a right side straightening component. A rotating barrel of a hollow structure is arranged between the left side straightening component and the right side straightening component. A cutting-off blanking component is arranged at one side of the left side straightening component. The left side straightening component and the right side straightening component each comprise a locating block, an upper straightening roller and a lower straightening roller. The locating blocks are located at the top of the workbench. Each upper straightening roller and the corresponding lower straightening roller are symmetrically arranged at one side of the corresponding locating block. A first straightening motor is arranged at the bottom of the workbench. The rotating barrel is internally provided with multiple straightening blocks. Each straightening block is provided with a round via groove. The round via grooves are arranged to be coaxial with the rotating barrel. A second straightening motor is arranged at the bottom of the workbench. The steel wire straightener has the beneficial effects of being simple in structure, convenient to maintain at the later stage and the like. Asteel wire can be effectively straightened and fractured for blanking.

The invention relates to a roller pelletizer for sludge ceramsite granulation and belongs to the technical field of pelletizing equipment. In order to solve the problems of low efficiency and high energy consumption at present, the invention provides the roller pelletizer for sludge ceramsite granulation. The roller pelletizer comprises a frame, a driving mechanism, a driving roller and a driven roller, wherein the driving roller is arranged on the frame in a rotatable form through a first rotating shaft; the driven roller is arranged on the frame in the rotatable form through a second rotating shaft; the driving roller and the driven roller are horizontally arranged; a plurality of through holes are formed along the circumferential directions of the roller walls of the driving roller andthe driven roller; the driving mechanism is capable of driving the first rotating shaft to drive the driving roller to rotate; a flywheel is fixed on the second rotating shaft of the driven roller; the flywheel is located on the outer side of the driven roller. The through holes and the flywheel are arranged, so that the overload damage of the power source, such as a motor, in the driving mechanism can be avoided, the energy-saving effect can be achieved, the sludge ceramsite can be prevented from attaching to the through holes, the pelletizing efficiency is increased and the performance of quickly pelletizing can be realized.

The invention belongs to the technical field of grafting devices for seed watermelons, and in particular relates to a grafting device for the seed watermelons. The device comprises a base seat; two vertical plates are fixed on the upper end of the base seat, and the opposite side walls of the two vertical plates are separately and fixedly connected with one transverse plate; the side wall of one end, far away from one corresponding vertical plate, of each transverse plate is provided with one first adjusting mechanism, and one end, far away from one corresponding transverse plate, of each first adjusting mechanism is fixedly connected with one clamping plate; and the upper end cross section of each clamping plate is semicircular, the lower part of each clamping plate is arc-shaped, each clamping plate is provided with one second adjusting mechanism, each second adjusting mechanism is arranged near the upper end of one corresponding clamping plate, and the side wall of one end, close toone transverse plate, of each clamping plate is fixedly connected with one limiting mechanism. The device disclosed by the invention has the advantages that when a grafting method is used for grafting, scions or rootstock can be effectively prevented from being cut, scion seedlings obtained after grafting can be effectively fixed to prevent stems of the scion seedlings from being broken, and a survival rate of the scion seedlings obtained after the grafting of the watermelons can be effectively improved.

The invention relates to the technical field of oil preparation via waste tires and particularly relates to an oil preparation method via waste tire degradation. Clear lime water and a waste tire are mixed so that calcium ions and hydroxyl ions can react with oil effective components and sulfur-containing components in the tire; by controlling the heating rate in a nitrogen protection environment, the bonds S-S and S-C in the waste tire break to remove the sulfur components while retaining the oil components; by controlling the temperature at 400-450 DEG C and pressure at 16-18MPa and 1.1-3h of reaction at constant temperature under constant pressure, the bonds S-S and S-C in the waste tire can break effectively under the effect of a desulfurizing agent, and the requirements on equipment are lowered; and moreover, through 10-20min of constant-pressure treatment at a temperature of 200-270 DEG C, the oil components and metal oxides in the desulfurizing agent react with other impurity components in the waste tire, and the oil recovery rate reaches 63-71%.

A clamp for machine tool processing comprises a bottom plate, two supports and a pair of bases, wherein a fixed cone body is arranged at the upper part of a left support and is connected to the left support through a connecting rod; the connecting rod is parallel to the bottom plate; a tip end of the fixed cone body faces the right side; an adjusting rod is in thread connection with the upper partof the right support, and a flat plate is arranged at the end part of the adjusting rod and is opposite to the fixed cone body; a chute is transversely arranged in the middle part of the upper surface of the bottom plate; the bases are correspondingly connected to the chute through sliding blocks in a sliding manner; an arc-shaped gap is formed in the top part of each base, and the two arc-shapedgaps are spliced to form a semicircle; a fixing plate which is fixed to the bottom plate is arranged at the outer side of each base; adjusting bolts are arranged on the fixing plates, and the end parts of the adjusting bolts are connected to the outer sides of the corresponding bases. The clamp is simple and reasonable in structure, easy to produce and manufacture, ingenious in design, novel in idea, and capable of effectively fastening a workpiece; a milling cutter or a processed object is prevented from breaking and cracking, so that the economic loss is avoided.

The invention discloses an anti-falling rat-proof plate. The anti-falling rat-proof plate comprises a rat blocking portion, a mounting portion and a monitoring portion, wherein the mounting portion isprovided with the rat blocking portion, the rat blocking portion is provided with a first rat blocking plate and a second rat blocking plate nested with the first rat blocking plate, safety pin fixing parts I are installed at the upper end and the lower end of one side of the first rat blocking plate, a safety pin shaft is connected between each safety pin fixing part I and each safety pin fixingpart II, a proximity switch is arranged on a door frame, and a proximity switch stop block is arranged on one side, close to the first rat blocking plate, of the door frame, and at the position opposite to the proximity switch; and the proximity switch is electrically connected with an alarm buzzer and a warning lamp. According to the anti-falling rat-proof plate, the second rat blocking plate which is connected in a nested mode is adjusted according to the width of the door frames of different power distribution rooms to adapt to different widths, and is fixed; and the breaking stress-adjustable safety pin shafts are arranged at the corresponding positions to be used as safety devices, so that a person is prevented from injuring due to falling; and the proximity switch is arranged and installed for position detection so as to prevent small animals from entering.

The invention provides a method for preparing a biomass retarder from agricultural wastes, and application of the biomass retarder. The method comprises the following steps: 1) performing high-energy ball milling on the agricultural wastes to obtain agricultural waste powder; 2) carrying out directional wet degradation on the agricultural wastes obtained in the step 1) through a metal-loaded solid acid catalyst; and 3) carrying out solid-liquid separation on the wet decomposition product to obtain the liquid biomass retarder, and recovering the catalyst at the same time. The biomass retarder prepared by the invention is good in water solubility, green, degradable, excellent in performance and low in cost, the whole production process is low in energy consumption and small in pollution, and the biomass retarder can be used as a cement retarder in cement admixtures. The invention provides a feasible technical path for high-value utilization of agricultural wastes and application of the agricultural wastes in the field of construction industry.

The invention relates to an elastic buffer tool fixture which comprises a base, a base plate arranged on the base, and a left clamping claw and a right clamping claw arranged on the base. Fixed support plates are arranged on the outer sides of the left clamping claw and the right clamping claw; adjusting bolts are in threaded connection onto the fixed support plates; the end parts of the adjustingbolts are connected with the outer sides of the corresponding clamping claws; springs are arranged on the adjusting bolts; sliding blocks are arranged on the bottom parts of the left clamping claw and the right clamping claw; a sliding chute is formed in a contact part of the base plate and each sliding block; and the left clamping claw and the right clamping claw are slidably connected with thebase plate through the sliding blocks and the sliding chutes. The elastic buffer tool fixture provided by the invention is simple and reasonable in structure, easy to produce and manufacture, ingenious in design, novel in conception, and capable of effectively fastening workpieces, and cannot cause the breakage of a milling cutter or an object to be processed, so that the economic loss is avoided.

The invention discloses a method for preparing monophenolic chemicals by loading ruthenium on metal organic framework material derivatives to catalyze lignin depolymerization. The method uses lignin as a raw material and small organic molecule alcohol as a reaction medium, and realizes the selective transformation of lignin by adjusting the metal ruthenium loading of the catalyst and the conditions of the catalytic system, while suppressing the formation of coke as a by-product. When the loading amount of ruthenium is 0.5wt.%~5wt.%, H 2 Under the conditions of pressure of 1-5MPa, reaction time of 230-290°C, and reaction time of 2-12 hours, the conversion rate of lignin can reach up to 80.20%, and the yield of monophenolic products can reach up to 14.45wt.%. The lowest yield is only 0.8wt.%, the highest yield of 4-ethylphenol reaches 5.56wt.%, and the highest selectivity can reach 41.72%. After the catalyst of the present invention is repeated 10 times, there is no obvious decrease in activity.

The invention discloses a furniture surface paint remover which is prepared from the following components in parts by weight: 42-45 parts of 3,4-hexanedione, 25-30 parts of bromoacetaldehyde ethylene acetal, 12-15 parts of polyethylene glycol dimetyl ether, 19-23 parts of di(isooctyl) phosphate, 12-14 parts of diphosphonic acid, 20-25 parts of propylene glycol phenyl ether, 22-24 parts of tetrachloroethylene, 8-10 parts of sodium dodecyl benzene sulfonate, 2-4 parts of ammonium bisulfate and 8-10 parts of deionized water. The furniture surface paint remover is environment-friendly, does not harm the health of an operator, is significant in effect, and has an excellent paint removal effect on multiple paints on the furniture surface; according to the paint remover, paint removal is carried out in a brushing form, the operation is simple, the paint removal time is short and the re-painting effect on the furniture surface from which the paint is removed is significant.

The invention discloses a convenient and fast type hardware tool clamp. The hardware tool clamp comprises a bottom plate, a pair of sliding plates and two adjusting bolts; the left side edge and theright side edge of the bottom plate are provided with supporting plates correspondingly, the two supporting plates are arranged in parallel, the front side edge and the rear side edge of the bottom plate are provided with sliding grooves correspondingly, and the two sliding grooves are arranged in parallel; the bottoms of the pair of sliding plates are connected with the sliding grooves in a sliding mode through sliding blocks correspondingly, threaded holes are formed in the two supporting plates correspondingly, the two adjusting bolts are in threaded connection with the corresponding threaded holes correspondingly, and the ends of the two adjusting bolts are connected to the outer sides of the corresponding sliding plates correspondingly; and semicircular notches are formed in the innersides of the two sliding plates correspondingly, semi-arc clamping pieces are arranged in the semicircular notches, and the two semi-arc clamping pieces are oppositely arranged. According to the hardware tool clamp, the structure is simple and reasonable, producing and manufacturing are easy, the design is ingenious, the conception is novel, a workpiece can be effectively fastened, a milling cutter or a machined article can not be fractured, and economic loss is avoided.

The invention discloses a method for preparing an aviation oil precursor by catalytic depolymerization of alkali lignin in an ethanol-water solvent through cooperation of a Pd / C catalyst and an alkali catalyst. The method comprises the following steps: taking alkali lignin as a raw material, adding an ethanol-water two-phase solvent into the raw material as a reaction solvent, respectively adding the Pd / C catalyst and a NaOH catalyst for depolymerization reaction, and after the reaction is finished, obtaining the aviation oil precursor. According to the method, alkali lignin is efficiently depolymerized through a reaction system of Pd / C, the NaOH catalyst and the ethanol-water two-phase solvent to prepare the aviation oil precursor, wherein the NaOH homogeneous alkali catalyst overcomes the problem that the yield of monocyclic aromatic compounds is low due to mutual competition of hydrodeoxygenation and hydrogenolysis bond breaking of a carbon-based metal catalyst; and the Pd / C catalyst has the hydrogenation activity Pd metal center, such that the heavy polymerization aggravation problem when the NaOH is adopted as the catalyst can be inhibited; the selectivity and the yield of the alkali lignin converted into the monocyclic aromatic compound can be improved by using the reaction system, the product complexity can be reduced, and the efficient depolymerization of the alkali lignin can be achieved to prepare the monocyclic aromatic compound.

The invention relates to a high-power diesel oil additive and a production process thereof, wherein the high-power diesel oil additive is composed of the following raw material components in parts by weight: 25-30 parts of methanol, 6-10 parts of TBHP, 7-12 parts of PEA, 4-8 parts of PIBA, 1-6 parts of PPG-6-decyltetradeceth-30, 2-5 parts of glycerin fatty acid ester, and 10-15 parts of diesel oil. The high-power diesel oil additive has a few of steps, has the advantages of simple process, low cost and safe products, effectively fractures a C chain in a diesel oil structure, increases the cetane number to 46-48%, increases the combustion rate to 40%-45%, thereby improving the motive power, reducing the occurrence of carbon deposition, saving more energy and oil, prolonging the service life, reducing the emissions of harmful substances, and reducing environmental pollution.

The invention provides a tool positioning device with simple structure, increased processing precision and work efficiency. A hollow cylindrical ring sleeve (8A1-8A3) comprises a hole (8a) engaged with the tool in a center part along the axle direction (O) and is clamped on the head between the tool and the tool. An upper end surface (8Au) along the axle direction on the ring sleeve (8A1-8A3) forms the surface vertical to the axle (O). In addition, the ring sleeve (8A1-8A3) comprises an inclined surface (8Ad) amplifying from the lower end to the upper end along the axle direction. Thus the inclined surface may form a conical surface with an included angle between the inclined surface and the axle being 5-85 degree and also may form a curved surface with an included angle between the tangent of the outer edge intersecting to the hole (8a) and the axle (O) being 5-85 degree.

The invention discloses a treatment method for improving the safety of a liquid light hydrocarbon storing tank. Special surface treatment is conducted on the inner surface of the tank, and a surface treatment method specifically comprises the following steps: (1) polishing treatment, (2) shot blasting treatment, (3) oil removing and cleaning treatment, (4) paint coating treatment, (5) irradiationtreatment and (6) heat-preservation treatment. According to the treatment method for improving the safety of the liquid light hydrocarbon collecting tank, the using stability and safety of the collecting tank are improved effectively.

The invention provides rose flower hydrosol as well as an extraction method and application thereof. The method comprises the following steps: (1) carrying out protein removal: carrying out protein removal treatment on rose flower powder; (2) extracting: adding an extraction solvent into a protein-removed rose flower sample and adding a mixture into a reaction kettle; extracting to obtain the roseflower hydrosol. The extraction method provided by the invention has a simple technology; high-pressure hydrothermal extraction, protein removal and de-coloring treatment are combined, so that the content of water-soluble polysaccharides in the rose flower hydrosol and the transparency of the rose flower hydrosol are remarkably improved.

The invention provides an indexable cutter blade for turning, which belongs to the technical field of a machining cutter, and solves the problems that the existing turning cutter blade is limited in control capacity for cuttings and the machined product is low in precision. The indexable cutter blade for turning comprises a cutter blade main body with an upper surface, a lower surface and side surfaces, wherein a cutting edge part is respectively formed between the two adjacent side surfaces and the upper surface, each cutting edge part is provided with a cutting edge angle, two sides of each cutting edge angle are respectively provided with a finishing edge, a cuttings accommodating groove is formed between two finishing edges, two sides of the cuttings accommodating groove are provided with cuttings breaking tables which are symmetric to each other, and the cuttings breaking tables are protruded upwards along the cutter blade main body and connected with the finishing edges. The indexable cutter blade has the advantages of higher cutting efficiency, good cuttings breaking effect and the like.

The invention relates to a luminescent material and a production method thereof. Part of calcium oxide is replaced with alkali metal oxide, a glass network is effectively enabled to be broken, calciumfluoride crystallization is promoted, and the luminescent property of a product material is improved; by means of control for reasonable reaction conditions and parameters in a preparation process, the luminescent material has good luminescent property and physical performance, the service life is prolonged, furthermore, the preparation process is simple and convenient, special reaction atmosphere is not needed, a reaction can be performed in conventional air atmosphere, and besides, the process is simple, easy to operate and suitable for industrial production.

The invention relates to the technical field of oil preparation via waste tires and particularly relates to an oil preparation method via waste tire degradation. Clear lime water and a waste tire are mixed so that calcium ions and hydroxyl ions can react with oil effective components and sulfur-containing components in the tire; by controlling the heating rate in a nitrogen protection environment, the bonds S-S and S-C in the waste tire break to remove the sulfur components while retaining the oil components; by controlling the temperature at 400-450 DEG C and pressure at 16-18MPa and 1.1-3h of reaction at constant temperature under constant pressure, the bonds S-S and S-C in the waste tire can break effectively under the effect of a desulfurizing agent, and the requirements on equipment are lowered; and moreover, through 10-20min of constant-pressure treatment at a temperature of 200-270 DEG C, the oil components and metal oxides in the desulfurizing agent react with other impurity components in the waste tire, and the oil recovery rate reaches 63-71%.

The invention discloses a direct-casting type anti-track agent, which is formed by the following components by weight in mixing mode: 20 to 40 parts of regenerative polyolefine plastic, 10 to 20 parts of regenerative polyester plastic, 2 to 10 parts of regenerative wax, 2 to 10 parts of organic powder body with small particle size and 5 to 10 parts of gilsonite. A preparation method of the direct-casting type anti-crack agent and a method for preparing asphalt mixture by adopting the direct-casting type anti-crack agent are further disclosed. Particles of the direct-casting type anti-crack agent can be directly cast in hot aggregate on construction sites to be mixed with the hot aggregate in drying mode, intermittent construction can be conducted, and the direct-casting type anti-track agent lowers or reduces probability of separation of modified asphalt in the cooling, transporting and storing processes, and break through limit and restraint brought by continuous production and construction.

The invention belongs to the technical field of grafting devices for seed watermelons, and in particular relates to a grafting device for the seed watermelons. The device comprises a base seat; two vertical plates are fixed on the upper end of the base seat, and the opposite side walls of the two vertical plates are separately and fixedly connected with one transverse plate; the side wall of one end, far away from one corresponding vertical plate, of each transverse plate is provided with one first adjusting mechanism, and one end, far away from one corresponding transverse plate, of each first adjusting mechanism is fixedly connected with one clamping plate; and the upper end cross section of each clamping plate is semicircular, the lower part of each clamping plate is arc-shaped, each clamping plate is provided with one second adjusting mechanism, each second adjusting mechanism is arranged near the upper end of one corresponding clamping plate, and the side wall of one end, close toone transverse plate, of each clamping plate is fixedly connected with one limiting mechanism. The device disclosed by the invention has the advantages that when a grafting method is used for grafting, scions or rootstock can be effectively prevented from being cut, scion seedlings obtained after grafting can be effectively fixed to prevent stems of the scion seedlings from being broken, and a survival rate of the scion seedlings obtained after the grafting of the watermelons can be effectively improved.

The invention discloses thermochemical modified starch, a preparation method and a method for preparing an adhesive by using the thermochemical modified starch and relates to modified starch and adhesives prepared by using the starch. The method is used for solving the technical problems of the existing starch adhesives that the water resistance is not ideal, the transportation cost is high, and the starch modification process is complicated. The thermochemical modified starch is prepared through uniformly spraying an acid solution into the starch, carrying out uniform mixing, then, carrying out heating treatment, carrying out baking, carrying out cooling, and then, carrying out crushing. The method for preparing the adhesive comprises the following steps: adding polyvinyl alcohol into a reactor pot with stirring, heating and cooling devices, adding water, adopting a staged-heating method to dissolve the polyvinyl alcohol with stirring, and then, cooling to room temperature; adding the thermochemical modified starch, carrying out stirring at room temperature, and then, adding polymethylene polyphenyl polyisocyanate, thereby obtaining the adhesive. According to the method, by using the technological characteristic that the starch-based adhesive is prepared by only adding the water to the thermochemical modified starch before use, the problem that the traditional solution type starch main agents are low in transportation efficiency and are prone to layering and mildewing is solved.

A compressing device for detection comprises a bottom plate and a plurality of sliding plates, wherein transverse chutes are correspondingly formed in the left side, the right side, the front side andthe rear side of the bottom plate; the plurality of sliding plates are arranged on the transverse chutes in the front side and the rear side; one sliding plate is arranged on each of the transverse chutes in the left side and the right side; the sliding plates are of double-layer structures including upper layer sliding plates and lower layer sliding plates; the lower layer sliding plates are provided with hollow chutes; the upper layer sliding plates are in sliding connection with the chutes through sliding blocks; adjusting bolts are arranged in the chutes; sliding moving blocks are arranged at the bottom parts of the lower layer sliding plates and are in sliding connection with the corresponding transverse chutes. The device is simple and reasonable in structure, easy to produce and manufacture, ingenious in design, novel in idea, and capable of effectively fastening a workpiece; a milling cutter or a processed object is prevented from breaking and cracking, so that the economic loss is avoided.

The invention discloses a needle breakage prevention device of a standard solution preparation instrument. The needle breakage prevention device comprises a base, a fixing plate, a slider, a pipettingneedle, a position detection device and flexible positioning devices, wherein a slideway for the slider to slide up and down is arranged between the fixing plate and the base, the slider is mounted in the slideway, the pipetting needle is fixed at the lower part of the slider, and the flexible positioning devices are used for applying a lateral contact force to the slider so as to allow the position of the slider in the slideway to be fixed. Each flexible positioning device comprises a positioning ball, a positioning spring and a positioning groove which is formed in the side portion of the slider and matched with the positioning ball, wherein a transverse sliding hole is formed in the fixing plate, the positioning ball is installed in the transverse sliding hole in a free sliding mode, one end of the positioning spring makes contact with the positioning ball, the other end of the positioning spring is fixed in the transverse sliding hole, and the positioning ball keeps pre-tighteningforce and is clamped in the positioning groove through the elastic force of the positioning spring. According to the invention, the deviation condition of the pipetting needle can be detected in time, the abnormal operation of the pipetting needle can be fed back in time, and the pipetting needle is effectively prevented from being broken due to abnormity.