67results about How to "Suitable for a wide range of applications" patented technology

The invention relates to a high-specific surface area nanometer mesoporous silicon carbide hollow ball and a preparation method thereof. The preparation method comprises dropwisely adding different amounts of silica precursor tetraethoxysilane into water-anhydrous ethanol mixed solutions with different ratios so that the silica precursor tetraethoxysilane is hydrolyzed into silica solid nanospheres with different diameters, dispersing the silica solid nanospheres in distilled water with different volumes, carrying out thermal insulation for a certain time to obtain nanometer mesoporous silicon carbide hollow balls with different diameters are obtained, coating the inner and outer shells of the nanometer mesoporous silicon carbide hollow ball with an organic matter layer so that the organic matter is insert into the shell walls, carrying out carbonization, mixing the reaction product, magnesium powder and a metal salt to obtain a uniform mixture, and carrying out thermal insulation in an inert atmosphere for some hours to obtain nanometer mesoporous silicon carbide hollow balls with uniform structures and adjustable sizes. The preparation method has a low reaction temperature and a low cost. The obtained hollow silicon carbide has the advantages of uniform structure, adjustable sizes, superhigh specific surface area of 648m<2> / g and excellent mesoporous structure.

The invention discloses a method for minitype quick breeding of sympodial bamboos nursery, which uses fasciculate bamboo shoots as minitype stock plant to be planted in a nursery for breeding new bamboos; when the root of stalk of the new budding bamboo grows, the new bamboo and the stock plant are separated and cultured in situ; when the root of the new bamboo grows and the lateral branch draws out, the new bamboo is implanted on seeding bags for culturing into seedlings of complete plantlet. The method provided by the invention is wide in application, simple in operation, low in cost and high in efficiency, and is a new technology with wide market prospect for bamboo plant breeding.

The invention relates to a waterproof roll with plant root impaling resistance and a manufacturing method thereof. The waterproof roll comprises a tyre basic layer, wherein the upper and lower surfaces of the tyre basic layer are provided with modified asphalt chemical root resisting agent waterproof layers; the outer surface of each modified asphalt chemical root resisting agent waterproof layer, which is far away from the tyre basic layer, is provided with an isolating layer; and the modified asphalt chemical root resisting agent waterproof layer is a structure manufactured by carrying out mechanical rabbling and blending on asphalt, a chemical root resisting agent, resin, a filler and an auxiliary agent at the temperature of 195 DEG C. The invention has the following advantages: the mildew-proof performance of the waterproof roll is enhanced, i.e. the waterproof roll does not generate toxin action on plants and effectively prevents the plant root from being impaled at the commissure of the roll; and the manufacturing method of waterproof roll of the invention is favor for realizing the automatized production line operation, and can greatly reduce the production cost under the condition of equal plant root impaling resistance, thereby being suitable for large-scale application.

The invention provides a cam shock wave type double-stage planar steel ball reducer. The cam shock wave type double-stage planar steel ball reducer comprises an input shaft, a lip type sealing ring, aleft end cover, a first-stage center wheel, a first-stage shock wave cam, a first-stage steel ball, a shell, a first thin-wall bearing, a first-stage guide frame, a second-stage center wheel, a second-stage steel ball, a second-stage shock wave cam, a cross roller bearing, a deep groove ball bearing, a sleeve cup, a check ring and a second thin-wall bearing. The first-stage shock wave cam and thesecond-stage shock wave cam are hinged to the corresponding shaft section through the second thin-wall bearing, the right side of the second thin-wall bearing is limited through the check ring, the left end cover is connected to the left end of the first-stage center wheel through screws, the right end of the first-stage center wheel and the shell are fixedly arranged at the left end of the second-stage center wheel through screws, and the cross roller bearing and the right end of the second-stage center wheel are fixedly connected. The cam shock wave type double-stage planar steel ball reducer has the advantages of being simple and compact in structure, high in transmission efficiency, wide in transmission ratio range, large in bearing capacity and the like, can be subjected to parameterization and serialized design and is suitable for wide application.

The invention discloses a two-stage sine hammer-shaped pin roller movable tooth reduction gear which mainly comprises an input shaft, a first-stage wave generator inner ring, a first-stage wave generator outer ring, a first shell, first-stage hammer-shaped pin roller movable teeth, a second shell, second-stage hammer-shaped pin roller movable teeth, a third shell, a second-stage movable tooth frame, a second-stage wave generator outer ring, a first-stage movable tooth frame, a frame seal ring and the like. The reduction gear has the advantages of a pin roller movable tooth reduction gear and the advantages of a steel ball movable tooth reduction gear, and a wave generator and a central wheel in transmission with the pin roller movable teeth and the movable tooth frame in transmission withsteel ball movable teeth are ingeniously combined together through the hammer-shaped pin roller movable teeth; by means of five composite integrated type specially-made crossed roller bearings, the whole reduction gear has the smaller draw ratio, lighter weight and lower machining and manufacturing difficulty and meanwhile has the higher structural rigidity, higher bearing capacity and higher transmission efficiency; and the reduction gear can be designed in a parameterization and serialization mode, can be applied to various fields and helps the rapid rising of intelligent manufacturing, 5G communication and other industries.

A single image self ¿C calibration method of relative parameter for structural light 3D system confirms all solutions of normalized relative translation positions [ TxTyTz]T as well as obtains unique correct solution and its rotary matrix R by obtaining a scene image to pick up calibration data ( Xc.Yc ) and ( Xp.Yp ) , to set up calibration data matrix A and to obtain three unknown coefficients of form solution e through reprojection method of structural light visual system with known internal parameters of video camera or projector and with five unset parameters to describe component relative relation .

The invention discloses a preparation method and an application of a graphene film composite activated aluminum oxide adsorbent adsorbing heavy metal ions and organic matter from waste water. The preparation method comprises the following steps: 1) taking activated aluminum oxide as a substrate, adding activated aluminum oxide into a polyvinyl alcohol organic solution to allow the surface of activated aluminum oxide to be rich in hydroxyl, putting in an oven at 20-50 DEG C for drying, obtaining the pretreated substrate for later use; 2) immersing the pretreated substrate in an alcohol solution containing a silane coupling agent with a volume concentration of 0.1-10%, taking out the substrate for drying, adding the substrate into an organic solution containing 0.1%-10 wt% of graphene, performing reaction for 1-10h at 50-100 DEG C, and obtaining the graphene film composite activated aluminum oxide adsorbent. Activated aluminum oxide is combined with the graphene; uncontrollability of a nanomaterial during subsequent treatment is avoided; a nano technology is creatively applied to the treatment of the heavy metal waste water, and the organic waste water that is high in toxicity, low in concentration and difficult to degrade; and adsorption rates are all above 97%.

The invention discloses a loading strip-structure silicon / PLZT hybrid waveguide-based Mach-Zehnder electro-optical modulator. The silicon / PLZT hybrid waveguide-based Mach-Zehnder electro-optical modulator comprises a waveguide, an MMI-based Mach-Zehnder interference structure and a coplanar waveguide electrode structure, wherein the waveguide comprises a silicon core layer, a ferroelectric thin film lower coating layer and a silicon dioxide upper coating layer, and the coplanar waveguide electrode structure is designed in order to achieve high-speed electro-optical modulation. The modulator sequentially comprises a coplanar waveguide electrode, the silicon dioxide upper coating layer, a silicon waveguide layer, a PLZT lower coating layer and an NST substrate from top to bottom, wherein thecoplanar electrode can be used for loading a radio frequency signal and loading the radio frequency signal to an optical wave to achieve electro-optical modulation. By the silicon / PLZT hybrid waveguide-based Mach-Zehnder electro-optical modulator, high modulation depth, low transmission loss and high modulation bandwidth can be achieved, and the silicon / PLZT hybrid waveguide-based Mach-Zehnder electro-optical modulator can be applied to an integrated high-speed microwave optical network.

The invention belongs to the field of a flow battery, and discloses a low-cost negative electrode electrolyte and a preparation method therefor. The low-cost flow battery negative electrode electrolyte is a negative electrode electrolyte based on a potassium hydroxide solution of small organic molecule 1, 8-dihydroxy anthraquinone (DHAQ). The preparation method for the low-cost flow battery negative electrode electrolyte comprises following steps of preparing 1M of KOH solution, adding an electrolyte raw material 1, 8-dihydroxy anthraquinone or derivative thereof or a mixture into the 1M KOH solution, dissolving and mixing uniformly, and performing constant volume by the 1M KOH solution to obtain the low-cost flow battery negative electrode electrolyte. The flow battery has the advantages of simple structure, low material cost, high energy density and high power density, and the like; and compared with an all-vanadium redox flow battery, the cost of the low-cost flow battery is reduced by 40%, so that the low-cost flow battery is quite suitable for being used as large-scale electric energy storage equipment for regulating peak and filling valley for a power grid.

The invention discloses an integrated type LED floodlight lamp, which comprises a shell, end covers, a light-transmitting panel, an LED light source, an LED power supply, a driving control circuit, a reflection device and an installation support, wherein the shell is arranged on the installation support; the end covers are clamped at both ends of the shell, the light-transmitting panel is clamped at the upper end of the shell, and the shell, the end covers and the light-transmitting panel form a seal space through combination; the LED light source is fixedly arranged on the inner wall of the shell; the LED power supply and the driving control circuit are arranged on the inner walls of the end covers or outside the lamp; the reflection device is arranged at the position opposite to the light source on the inner wall of the shell; and the LED power supply and the driving control circuit are electrically connected with the LED light source and have no thermal contact with the LED light source. The integrated type LED floodlight lamp has the advantages of no glare, uniform light distribution, high-efficiency heat-dissipating effect, low energy consumption, long service life, small attenuation of light energy, low production cost and simple machining.

The invention discloses a pipeline leakage detection device. The pipeline leakage detection device comprises a protection cover and a pipeline assembly, the pipeline assembly is located in the protection cover, the protection cover is provided with an opening, the opening and the pipeline assembly form a sealing space, a through hole is formed in the protective cover, a vacuum tube penetrates through the through hole, a first clamping piece is arranged at the end, located in the sealing space, of the vacuum tube, a second clamping piece is arranged at the end, located outside the sealing space, of the vacuum tube, the first clamping piece and the second clamping piece are used for clamping the protective cover and enabling the through hole to be in a sealed state, a detection opening is formed in the end, extending out of the sealing space, of the vacuum tube, a detection element is arranged in the detection opening, and a control valve is arranged at the end, opposite to the detectionopening and the through hole, of the vacuum tube. Once leakage occurs, leaked material enters the vacuum tube due to the fact that the sealing space is in a negative pressure state, leakage can be detected according to the detection element, so that whether the pipeline assembly leaks or not can be detected.

The invention discloses a fire-fighting area passability analysis system based on stereoscopic vision. The firefighting area passability analysis system comprises an input module, a depth estimation module and a passability analysis module, the depth estimation module comprises a twin network layer with shared weight, a pyramid stereo matching network, a projection transformation layer and a three-dimensional inverse projection layer; the twin network layer and the pyramid stereo matching network receive the binocular image transmitted by the input module, and pixel-level features for stereo matching and advanced features for target detection are extracted; the projection transformation layer is used for constructing a plane scanning body; the three-dimensional inverse projection layer isused for converting the plane scanning body into a 3D geometry through a derivable image torsion operation, and constructing three-dimensional geometrical characteristics of a world coordinate system;and a passability analysis module which is constructed based on a 3D convolutional network and is used for performing passability analysis on the three-dimensional geometry. According to the invention, the scene depth can be jointly generated, the passability analysis is carried out on the 4 * 4 * 10 m< 3 > space of the fire-fighting area, and the smoothness of a fire-fighting life passage is ensured along with the patrol of the intelligent miniature fire-fighting vehicle-mounted binocular vision system.

The embodiment of the invention discloses a mapping method and device based on an image group. The method comprises the following steps: acquiring multiple groups of road images when a vehicle travelsfor multiple times in the same position area and a positioning pose corresponding to each road image; performing data association among the semantic features in each group of road images to obtain associated semantic features belonging to the same road sign among each group of road images, and determining a first position of the associated semantic features in a world coordinate system; determining a reprojection error between the associated semantic feature and the corresponding semantic feature in each road image according to the first position and the positioning pose corresponding to eachroad image, determining a projection error sum value between the reprojection errors, and determining a second position of the associated semantic feature in the world coordinate system according tothe projection error sum value; and adding the associated semantic feature and the second position to the map. By applying the scheme provided by the embodiment of the invention, the accuracy of the constructed map information can be improved.

The invention discloses a spring damping shock absorber. The spring damping shock absorber includes an upper seat, a lower seat, damping springs located between the upper seat and the lower seat, anda piston damping device; the piston damping device is arranged in the damping springs; the central axis of the damping springs is in coincidence with the central axis of the piston damping device; thepiston damping device includes a piston rod fixed on the lower surface of the upper seat and a piston barrel fixed on the upper surface of the lower seat; a piston barrel cover is installed on the upper end of the piston barrel; the lower end of the piston rod is provided with a piston head stretching into the piston barrel; and the space located under the piston head in the piston barrel is a cavity. Through the double arrangement of spiral springs and the piston damping device, the problem of small damping of traditional single metal spiral springs can be overcome; and under the dual function of the piston damping device and the damping springs, the damping effect of the spring damping shock absorber can be better, and the spring damping shock absorber is simple in structure and suitable for application with wider scopes.

The invention discloses a giant-dielectric-constant low-loss CCTO-based ceramic material preparation method. The method includes steps: dissolving a precursor material into a solvent to obtain precursor sol; standing the precursor sol, and drying to obtain dry gel; grinding the dry gel into fine powder, drying and grinding to obtain a CCTO-based ceramic material precursor; adding the CCTO-based ceramic material precursor into a copper crucible, performing laser irradiation, and removing the solvent to obtain CCTO-based ceramic powder; subjecting the CCTO-based ceramic powder to compaction forming and laser sintering to obtain a giant-dielectric-constant low-loss CCTO-based ceramic material. Compared with the prior art, the method has advantages that the dielectric constant of the ceramic material prepared according to the method reaches 104 or above, and the preparation method is low in cost, quick, efficient and suitable for extensive application of CCTO giant-dielectric-constant materials to high-density storage devices.

The invention discloses a ferrule quality detection device. The device comprises a bottom plate, a material channel and a roller way; the material channel and the roller way are arranged on one side of the bottom plate, the roller way is arranged on one side of the material channel, and the material channel and the roller way are arranged on the same horizontal plane in a collinear mode; a material channel connecting piece is arranged on one side of the material channel, a clamping plate fixing connecting seat is fixedly arranged on the other side of the material channel, a ferrule outer angleclamping plate is arranged in the clamping plate fixing connecting seat, the two ends of the ferrule outer angle clamping plate penetrate through the clamping plate fixing connecting seats, and the two ends of the ferrule outer angle clamping plate extend to one side of the outer wall of the clamping plate fixing connecting seat and the material channel respectively; and a measuring head up-downmoving air cylinder is arranged at the top of one end of the material channel, and a measuring head fixing rod is fixedly arranged at the bottom end of the measuring head up-down moving air cylinder.According to the ferrule quality detection device, the quality of the ferrule is detected in a mechanical detection manner, the detection efficiency and the detection quality of the ferrule are improved, and the device is simple in structure, convenient to operate, safe to use and suitable for wide-range application.

The invention provides a high-conductivity soft aluminum monofilament with good heat resistance and a preparation method thereof. The soft aluminum monofilament is prepared from industrial pure aluminum with the purity of more than or equal to 99.7%, Al-B intermediate alloy and Al-RE intermediate alloy, and the Al-B intermediate alloy and the Al-RE intermediate alloy are prepared from the following components of, in percentage by mass, less than or equal to 0.02% of B, 0.1%-0.3% of RE, less than or equal to 0.07% of Si, less than or equal to 0.2% of Fe, 0.012% of (V + Ti + Cr + Mn) and the balance Al and inevitable impurities; and Re is one or two of La or Ce. According to the soft aluminum monofilament, the heat resistance of the soft aluminum monofilament is greatly improved on the basisof improving the electric conductivity of the soft aluminum monofilament, so that the soft aluminum monofilament more meets the requirement of power grid construction.

The invention relates to an automatic clamp spring mounting device which comprises a rack, a displacement device arranged on the rack in a displaceable mode, a bearing sleeve mounted on the displacement device, an outer sleeve connected to an axial sleeve in a rise-fall and sleeving mode, a transition cylinder detachably connected to the end, penetrating out of the outer sleeve, of the axial sleeve, a conical part arranged at the end, away from the axial sleeve, of the transition cylinder, a material containing table located below the axial sleeve, an axial hole which is formed in the material containing table and can communicate with a clamp spring clamp opening, a separating device used for disassembling and assembling the transition cylinder and the axial sleeve, and an assembling station used for installing a workpiece to be assembled. When the axial sleeve gets close to the material containing table, the transition cylinder can penetrate through the clamp spring clamp opening and is arranged in the axial hole, the transition cylinder is separated from the axial sleeve, the axial sleeve moves to the assembling station, and the axial sleeve is connected to the outer side of the workpiece to be assembled in a sleeving mode. The automatic clamp spring mounting device has the effect of improving the full-type applicability of clamp spring automatic mounting.

The invention relates to a non-contact milk freshness detection system and a detection method thereof, belongs to the technical field of milk freshness detection, and aims at providing a hardware structure of the non-contact milk freshness detection system and improving a detection method thereof. The system comprises a microprocessor for data collecting and processing, the microprocessor is connected with an external information interaction device including a keyboard and a display screen concretely, a peripheral circuit of the microprocessor is connected with a clock control chip and a temperature sensor, the signal output end of the microprocessor is connected with a data storage module and a data communication module, the data communication module includes a GPRS wireless communicationmodule concretely, the GPRS wireless communication module establishes connection with a host computer via the wireless network, and the display screen for displaying freshness data of milk is arranged outside the host computer; and software for training collection data is arranged in the host computer. Thus, the milk freshness is detected.

The invention discloses a pay-off rack device which can be conveniently dismounted and mounted for usage and is used for a cable. The pay-off rack device comprises an underframe. The underframe is arranged on the ground. A horizon sensor is arranged on the underframe. A base device is arranged under the underframe. A movable support device is arranged on the upper portion of the underframe. A hydraulic oil tank device is arranged on the underframe. A controller is arranged at one end of the underframe. The signal receiving end of the controller is electrically connected with the horizon sensor. The power supply output end of the controller is electrically connected with a supporting hydraulic electromagnetic valve, a telescopic hydraulic electromagnetic valve, the hydraulic oil tank deviceand a hydraulic fixing device. The pay-off rack device has the beneficial effects of being simple in structure and high in practicability.

The invention discloses a pipeline leakage detection device. The pipeline leakage detection device comprises a protection cover and a pipeline assembly, the pipeline assembly is located in the protection cover, the protection cover is provided with an opening, the opening and the pipeline assembly form a sealing space, a through hole is formed in the protective cover, a vacuum tube penetrates through the through hole, a first clamping piece is arranged at the end, located in the sealing space, of the vacuum tube, a second clamping piece is arranged at the end, located outside the sealing space, of the vacuum tube, the first clamping piece and the second clamping piece are used for clamping the protective cover and enabling the through hole to be in a sealed state, a detection opening is formed in the end, extending out of the sealing space, of the vacuum tube, a detection element is arranged in the detection opening, and a control valve is arranged at the end, opposite to the detectionopening and the through hole, of the vacuum tube. Once leakage occurs, leaked material enters the vacuum tube due to the fact that the sealing space is in a negative pressure state, leakage can be detected according to the detection element, so that whether the pipeline assembly leaks or not can be detected.

The invention discloses a small double-stage hammer-shaped pin roller oscillating tooth speed reducer. The small double-stage hammer-shaped pin roller oscillating tooth speed reducer mainly comprisesa first shell body, an input shaft, a primary shock diffuser inner ring, a primary shock diffuser outer ring, primary hammer-shaped pin roller oscillating teeth, a second shell body, a primary oscillating tooth frame, secondary hammer-shaped pin roller oscillating teeth, a secondary shock diffuser outer ring, a secondary shock diffuser inner ring, a third shell body, a secondary oscillating toothframe, a primary center wheel, a secondary center wheel and the like. The device draws the beneficial effects of a pin roller oscillating tooth speed reducer and a steel ball oscillating tooth speed reducer, five composite integrated specially-made crossed roller bearings are adopted, and the whole machine has a smaller length-diameter ratio, a lower weight and a lower machining and manufacturingdifficulty, and meanwhile has higher structural rigidity, higher bearing capacity and higher transmission efficiency. The speed reducer can be subjected to parameterization, miniaturization and serialization design, can be applied to multiple fields, and can assist rapid rise of the industries such as intelligent manufacturing and 5G communication.

The invention relates to a stove which comprises a stove body. A thermal insulation net is arranged around the outer side of the stove body, and a countertop with the hollow middle is arranged at the top of the stove body. A heating utensil can be placed on the countertop. An electric energy converter is arranged one side of the stove body and converts heat energy generated in the stove body into electric energy which is stored in a battery module arranged at the bottom, and a USB interface is arranged on the electric energy converter. A row of solar panels are arranged at the top of the electric energy converter and used for converting collected solar energy into electric energy which is stored in the battery module. The stove provides a novel route for outdoor power supply and meets market requirements.

The invention belongs to the technical field of heat exchangers and particularly relates to a composite tube plate for a heat exchanger and the heat exchanger containing the same. The composite tube plate for the heat exchanger sequentially comprises a metal pore plate, a polytetrafluoroethylene tube plate and a metal reinforcing plate. The metal pore plate, the polytetrafluoroethylene tube plateand the metal reinforcing plate are fixed to form an integral structure through connecting pieces. Sealing components are arranged between the metal pore plate and the polytetrafluoroethylene tube plate as well as between the polytetrafluoroethylene tube plate and the metal reinforcing plate. The outer surface of the metal pore plate and / or the outer surface of the metal reinforcing plate are / is coated with a corrosion-resistant material. By means of the composite tube plate for the heat exchanger and the heat exchanger containing the same, integral mechanical strength of the polytetrafluoroethylene tube plate is greatly enhanced; the requirement that the deformation quantity of the polytetrafluoroethylene tube plate is within an acceptable range even under the working conditions of the high pressure and temperature can be met; the problem that the heat exchanger is destroyed due to deformation of the polytetrafluoroethylene tube plate is avoided; and use safety of the heat exchanger is guaranteed.

The invention relates to a waterproof roll with plant root impaling resistance and a manufacturing method thereof. The waterproof roll comprises a tyre basic layer, wherein the upper and lower surfaces of the tyre basic layer are provided with modified asphalt chemical root resisting agent waterproof layers; the outer surface of each modified asphalt chemical root resisting agent waterproof layer, which is far away from the tyre basic layer, is provided with an isolating layer; and the modified asphalt chemical root resisting agent waterproof layer is a structure manufactured by carrying out mechanical rabbling and blending on asphalt, a chemical root resisting agent, resin, a filler and an auxiliary agent at the temperature of 195 DEG C. The invention has the following advantages: the mildew-proof performance of the waterproof roll is enhanced, i.e. the waterproof roll does not generate toxin action on plants and effectively prevents the plant root from being impaled at the commissure of the roll; and the manufacturing method of waterproof roll of the invention is favor for realizing the automatized production line operation, and can greatly reduce the production cost under the condition of equal plant root impaling resistance, thereby being suitable for large-scale application.

The invention provides a preparation method for a copper calcium titanate based ceramic material. The preparation method comprises the following steps: uniformly mixing base materials or a mixture ofthe base materials and a doping material, and carrying out high-energy ball milling so as to obtain a ball-milled material; and adding a binder into the ball-milled material, carrying out granulationand compaction, and carrying out sintering or laser irradiation so as to obtain the copper calcium titanate based ceramic material; wherein the base materials comprise copper oxide, calcium oxide, titanium dioxide and copper powder. The preparation method provided by the invention has the following advantages: laser sintering of a medium material is highly-efficient and energy-saving; a giant-dielectric material CCTO based ceramic material with fine particles and good compactness is finally obtained; meanwhile, the preparation method for a capacitor has low cost, is rapid and highly-efficient,and is applicable to wide-range application of a CCTO giant-dielectric material in high-density memory devices.

The invention provides a method for easily synthesizing chromium oxides. The method includes the specific steps that CrO3 is weighed and calcined in air, the temperature fluctuates from 260-264 DEG Cto 277-280 DEG C back and forth, one fluctuation period lasts when the temperature rises to 277-280 DEG C from 260-264 DEG C and then returns to 260-264 DEG C, the time used for one fluctuation periodis 0.5-3 min, calcination is carried out for 48 hours or longer, and the pure-phase Cr3O8 is obtained. Compared with the prior art, no special synthesis environments such as high temperature and highpressure and pure oxygen are needed, the pure-phase Cr3O8 or Cr8O21 can be synthesized in the air, and the method is simple and easy to carry out and suitable for being applied on a large area.

The invention provides a plasticizer which is composed of the following components in parts by weight: 50-70 parts of diethylene glycol phenyl acetate, 10-15 parts of ethylene glycol, 10-15 parts of epoxidized soybean oil or palm oil, and 5-7 parts of glycerol. The invention further provides a preparation method of the plasticizer. The plasticizer disclosed by the invention has the advantages of low cost, environment friendliness, safety and good chemical stability; furthermore, the preparation method is simple and is suitable for wide-range application.