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33results about How to "Production cost economy" patented technology

Low-temperature X80HD (High Density) large-deformation pipeline steel with great wall thickness and production method thereof

The invention discloses low-temperature X80HD (High Density) large-deformation pipeline steel with great wall thickness and a production method thereof, belonging to the technical field of medium-thickness plate production and longitudinal submerged arc welded tube production. A steel plate comprises the following chemical components in percentage by mass: not less than 0.04% and not greater than 0.09% of C, not greater than 0.35% of Si, not less than 1.5% and not greater than 1.85% of Mn, not greater than 0.012% of P, not greater than 0.004% of S, not less than 0.02% and not greater than 0.05% of Nb, not less than 0.008% and not greater than 0.025% of Ti, not less than 0.10% and not greater than 0.50% of Ni, not less than 0.10% and not greater than 0.45% of Cr, not less than 0.10% and not greater than 0.30% of Cu, not less than 0.10% and not greater than 0.35% of Mo, not less than 0.020% and not greater than 0.070% of Alt, not greater than 0.0005% of B, not greater than 0.0050% of Ca, and the balance of Fe and inevitable impurities. A preparation method of the steel plate comprises the processes such as converter smelting, external refining, continuous casting, heating, controlled rolling, relaxation phase change control and quick cooling; a texture of the rolled steel plate is ferrite, bainite and a little M / A (Martensite / Austenite), wherein ferrite content is 60%-85%, and bainite and M / A content is 15%-40%. The obtained X80HD large-deformation pipeline steel has high strength and toughness, a high work-hardening index, high uniform ductility, a low yield ratio and good deformation resistance.
Owner:SHOUGANG CORPORATION

Small-range tunnel horizontal plane model tester system for realizing multistage and master control loading

InactiveCN101696913ASolve technical problems such as loading failureSimple assembly principleStructural/machines measurementForce measurement by elastic gauge deformationSteel ballOperability
The invention relates to a small-range tunnel horizontal plane model tester system for realizing multistage and master control loading, comprising a loading inside casing realizing direct applying and load transferring, a reaction frame outline border providing test reaction support and a bolt machinery meshed jacking and high-sensitivity pull pressure sensor measurement cooperating combined loading device, wherein the reaction frame outline border and the loading inside casing are connected by the loading device to form an integral box system; the loading inside casing employs a iterative structure of a wood board and a steel board; steel balls and self-locking screws are distributed on the wood board; a square well-shaped steel tube in the reaction frame outline border is pressed on an organic glass cover board; a bottom loaded plate is arranged on the bottom of the whole system; a bolt and a high-strength nut in the loading device are in cooperative installation; and one end of the bolt is embedded into the high-sensitivity pull pressure sensor. Due to adopting the structure, the invention solves the technical problems that the prior jack can not realize small-range and high-precision side loading and meanwhile improves the problem of loading abrasion of the loading inside casing, thereby increasing the operability and the measurement precision of tests.
Owner:TONGJI UNIV

Zinc catalyst applicable to controllable depolymerization of polyester material and catalytic method thereof

The invention discloses a zinc catalyst applicable to controllable depolymerization of a polyester material and a catalytic method thereof, and belongs to the technical field of polyester depolymerization. The problems that an existing zinc catalyst used for alcoholysis of waste polyester materials needs to synthesize complex ligands, and the number of synthesis steps is increased are solved. Thecatalyst adopted by the invention is a bis(hexaalkyldisilazane)zinc catalyst with a simple structure, and under the participation of an alcohol compound, the polyester material can be depolymerized into small organic molecules under mild conditions through the transesterification reaction catalyzed by the catalyst, so that the reutilization of waste polyester is realized. The zinc catalyst is adopted to catalyze polyester depolymerization, metal zinc is non-toxic, colorless, cheap and easy to obtain and serves as one of the microelements of a human body, biocompatibility is good, and the production process is more environmentally friendly; the catalyst is simple in structure, few in synthesis steps and more economical in production cost. The catalyst has very good universality, and has a very good depolymerization effect on various polyester materials with different structures.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Process for brewing table vinegar

The invention discloses a process for brewing table vinegar. The process comprises the following steps of: 1) moistening raw materials with water; 2) cooking; 3) saccharifying and alcoholizing; 4) performing acetic fermentation; 5) adding salt and fermenting; 6) pouring vinegar; and 7) aging raw vinegar. In the raw vinegar aging process, the poured raw vinegar is filled in a container, and part of the raw vinegar is buried into soil for cellaring and aging by an unique cellar type aging brewing process, and the temperature of upper and lower parts of the container is generated by using the delay property of soil heat condition, so that the raw vinegar in the container can naturally exchange heat, and the aging temperature of the table vinegar is controlled to be in the relatively appropriate range; and the process has the advantages that the esterification temperature is relatively stable, the time for the appropriate esterification temperature is long, and esters substances can be generated in the aging process. The obtained table vinegar product is soft and mellow in acid taste and long in aftertaste, can be used for dipping, food cooling and dressing, and cooking, and is the necessary good item which is eaten with rice or bread and is used for seasoning.
Owner:QIANHE CONDIMENT & FOOD CO LTD

Method for catalytically degrading waste polyester material by using zinc catalyst

The invention discloses a method for catalytically degrading a waste polyester material by using a zinc catalyst, belongs to the technical field of polyester degradation, and aims to solve the problems that an existing polyester waste chemical recovery catalyst is low in catalytic efficiency and low in material universality. According to the method disclosed by the invention, a zinc catalyst with a simple structure is adopted, and various polyester materials are depolymerized into small organic molecules through an ester exchange reaction catalyzed by the zinc catalyst under the participation of an alcohol compound, so that the recycling of the waste polyester is realized; and the method disclosed by the invention has good universality, and has a good depolymerization effect on polyester materials with various different structures.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Seawater corrosion-resistant steel pipe and manufacturing method

The invention discloses a seawater corrosion-resistant steel pipe. The seawater corrosion-resistant steel pipe comprises a ferrite-pearlite mixed matrix and contains 0.13-0.20wt% of C, 0.10-0.35wt% of Si, 0.9-1.5wt% of Mn, 0.05-0.4wt% of Cr, 0.01-0.04wt% of Al, 0.05-0.4wt% of Cu, 0.05-0.3wt% of Ni, 0.06-0.12wt% of V, 0.008-0.02wt% of N and the balance Fe and other unavoidable impurities. The invention discloses a manufacturing method of the seawater corrosion-resistant steel pipe. The manufacturing method comprises the following steps of 1, smelting, 2, casting and then rolling for round pipe blank production, 3, heating and soaking, 4, austenite-phase rolling for steel pipe production, and 5, cooling to a room temperature. The seawater corrosion-resistant steel pipe has excellent seawater corrosion resistance, good processing welding performances and excellent low-temperature toughness.
Owner:BAOSHAN IRON & STEEL CO LTD

Acidic milk powder and preparation method thereof

ActiveCN102106388ASour and deliciousGood brewabilityMilk preparationFruit juiceDry mixing
The invention discloses acidic milk powder and a preparation method thereof. The acidic milk powder comprises milk solids, and further comprises the following components by weight percent: 1.5% to 2.5% of stabilizing agent and 0.4% to 2.5% of acidity regulator. The preparation method comprises the following steps: firstly, concentrating milk to obtain concentrated milk; secondly, mixing the concentrated milk with the stabilizing agent to obtain stable concentrated milk; thirdly, mixing the stable concentrated milk with acidic solution to obtain acidic concentrated milk; and fourthly, spray drying the acidic concentrated milk to obtain the acidic milk powder. The acidic milk powder has a stronger acid taste, is delicious, and has good dissolubility and good mouthfeel; the production technology of the acidic milk powder overcomes the detect of the direct dry mixing technology that products have poor dissolubility and overcomes the technical problem that acidic / juice milk is not suitablefor being concentrated or spray-dried directly, so that protein does not denature during the spray drying process; and since neither stabilizing agent or juice is concentrated, so that the phenomena of coking on the surface of a heater is avoided. The invention has low manufacturing cost and is applicable to large-scale industrial production.
Owner:BRIGHT DAIRY & FOOD

Biphasic stainless steel line pipe with yield strength of 555 MPa or above and manufacturing method thereof

The invention discloses a biphasic stainless steel line pipe with yield strength of 555 MPa or above. The microstructure of the biphasic stainless steel line pipe is martensite and ferrite, and the biphasic stainless steel line pipe comprises the following chemical elements in percentage by mass: 0.03-0.07% of C, 0.1-0.4% of Si, 0.1-0.5% of Mn, 13.5-15.0% of Cr, 0.6-1.5% of Ni, 0.2-1.0% of Mo, 0.002-0.08% of N, and the balance of Fe and inevitable impurity elements, wherein the mass percentage compositions of the elements meets a formula that Cr+1.5Mo+2Ni+16 N is greater than or equal to 16.5, Ni-3(C+N) is greater than or equal to 0.5, and Nb+V+Ti is less than or equal to 0.1. The invention also provides a manufacturing method of the biphasic stainless steel line pipe with yield strength of 555 MPa or above. The line pipe disclosed by the invention is high in intensity and good in corrosion resistance and crack resistance.
Owner:BAOSHAN IRON & STEEL CO LTD

Water gel and ammonium nitrate fuel oil explosive and production method thereof

The invention relates to the technical field of industrial explosive production, and in particular relates to a water gel and ammonium nitrate fuel oil explosive and a production method thereof. The water gel and ammonium nitrate fuel oil explosive with adjustable density, initiation sensitivity, explosive property, free-running property or viscosity is produced from different special ammonium nitrate fuel oil explosives and water gel explosives according to different proportioning requirements, has the characteristics of economical production cost and the like, meets the actual demands of different blasting works, and especially solves the problem of difficult explosive filling in an upward blast hole. The research proves that the water gel and ammonium nitrate fuel oil explosive with the adjustable initiation sensitivity can ensure the safety of explosive filling in the on-site blast hole, provides a material basis and technical support for smooth national economy construction, generates good economic and social benefits, and has very good application and popularization prospects.
Owner:山东圣世达化工有限责任公司

Cement grouting mortar with high permeability and preparation method thereof

The invention relates to a cement grouting mortar with high permeability prepared by components in the following mass ratio: 51-61% of cement; 0.06-0.12% of additive; 3-5% of admixture; 6.5-12.5% of sand and 28-32% of water. Compared with the prior art, the cement grouting mortar with high permeability provided by the invention has advantages of great mobility, high strength, good stability, simple process operations, and low preparation costs and the like, can be widely used in road engineering, constructional engineering, and geotechnical engineering, and in particular, is adapted to grouting-typed bituminous concrete-cement mortar pavement engineering.
Owner:南京荣德信交通科技有限公司

Anisotropic piezoelectric material and preparing method thereof

InactiveCN103964845AIncreased anisotropyHigh polarization direction piezoelectric constantLead zirconate titanateHydrophone
The invention provides an anisotropic piezoelectric material and a preparing method thereof. The composition chemical formula is as follows: [(1-x) (0.7PbZrO3 - 0.3K0.5Bi0.5TiO3) - xPbTiO3] + yPbZnNb2O5, x = 0.25 - 0.30, y = 0.01 - 0.20. The preparing method comprises the following preparing steps: mixing materials by a mass molar in the formula, ball-grinding by a wet method, briquetting after drying and synthesizing; synthesizing blocks after coarse grinding, carrying out secondary wet ball grinding, and pelletizing polyvinyl alcohol after drying; feeding degummed biscuits in an aluminum oxide crucible and sintering into ceramic; carrying out electrode oil bath polarization on the ceramic to obtain the anisotropic piezoelectric material. The material has high anisotropism, the piezoelectric strain coefficient in the polarization direction is larger than the piezoelectric coefficient in the non-polar direction, and the isostatic pressing piezoelectric sensitivity is as high as 40*10<-3> V.m / N and much higher than that of a lead zirconate titanate piezoelectric material. The material ingredients are reasonable and are easy to sinter and polarize, and the material is particularly suitable for manufacturing high-sensitivity and high-resolution hydrophones.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI

Method for catalytically depolymerizing polylactic acid and analogues thereof by magnesium catalytic system

The invention discloses a method for catalytically depolymerizing polylactic acid and analogues thereof by a magnesium catalytic system, which belongs to the technical field of polyester depolymerization. According to the method disclosed by the invention, under the catalysis of a bis (hexamethyldisilazane) magnesium or dibutyl magnesium catalyst, alcoholysis of polylactic acid and analogues thereof is realized in the presence of an alcohol compound to obtain small organic molecules, so that effective utilization of waste polylactic acid and analogues thereof is realized. The green and environment-friendly magnesium catalyst with a simple structure is adopted for catalysis, the process is green and environment-friendly, the reaction can be efficiently carried out under mild conditions, and the catalyst has good universality and has a good depolymerization effect on polylactic acid with various different structures and analogue materials thereof.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Method for preparing enamel arc plate with radius r larger than 3000 mm

The invention discloses a method for preparing an enamel arc plate with the radius r larger than 3000 mm. The method comprises the following steps of plate laser cutting; plate corner bending; plate corner full-welding; welding and grinding; surface treatment; glaze spraying; high-temperature sintering; surface coating; and aluminum honeycomb core pressure welding, and specifically, an arc plate is formed by mold pressing and the pressure welding of a galvanized steel plate is carried out, or, the pressure welding of the aluminum honeycomb core and the galvanized steel plate is carried out sequentially, the arc plate is formed by the mold pressing so as to prepare the enamel arc plate with the radius of greater than 3000 mm, and boxing and warehousing are carried out. According to the method for preparing the enamel arc plate with the radius r larger than the 3000 mm, the manufacturing of different radians can be realized, a product is high in first-passyield, the procedures of ring circle forming, rib welding, manual shaping and the like are eliminated, and the production efficiency is improved.
Owner:ZHEJIANG KAIER NEW MATERIALS

Low temperature large wall thickness x80hd large deformation pipeline steel and its production method

The invention discloses low-temperature X80HD (High Density) large-deformation pipeline steel with great wall thickness and a production method thereof, belonging to the technical field of medium-thickness plate production and longitudinal submerged arc welded tube production. A steel plate comprises the following chemical components in percentage by mass: not less than 0.04% and not greater than 0.09% of C, not greater than 0.35% of Si, not less than 1.5% and not greater than 1.85% of Mn, not greater than 0.012% of P, not greater than 0.004% of S, not less than 0.02% and not greater than 0.05% of Nb, not less than 0.008% and not greater than 0.025% of Ti, not less than 0.10% and not greater than 0.50% of Ni, not less than 0.10% and not greater than 0.45% of Cr, not less than 0.10% and not greater than 0.30% of Cu, not less than 0.10% and not greater than 0.35% of Mo, not less than 0.020% and not greater than 0.070% of Alt, not greater than 0.0005% of B, not greater than 0.0050% of Ca, and the balance of Fe and inevitable impurities. A preparation method of the steel plate comprises the processes such as converter smelting, external refining, continuous casting, heating, controlled rolling, relaxation phase change control and quick cooling; a texture of the rolled steel plate is ferrite, bainite and a little M / A (Martensite / Austenite), wherein ferrite content is 60%-85%, and bainite and M / A content is 15%-40%. The obtained X80HD large-deformation pipeline steel has high strength and toughness, a high work-hardening index, high uniform ductility, a low yield ratio and good deformation resistance.
Owner:SHOUGANG CORPORATION

Acidic milk powder and preparation method thereof

The invention discloses acidic milk powder and a preparation method thereof. The acidic milk powder comprises milk solids, and further comprises the following components by weight percent: 1.5% to 2.5% of stabilizing agent and 0.4% to 2.5% of acidity regulator. The preparation method comprises the following steps: firstly, concentrating milk to obtain concentrated milk; secondly, mixing the concentrated milk with the stabilizing agent to obtain stable concentrated milk; thirdly, mixing the stable concentrated milk with acidic solution to obtain acidic concentrated milk; and fourthly, spray drying the acidic concentrated milk to obtain the acidic milk powder. The acidic milk powder has a stronger acid taste, is delicious, and has good dissolubility and good mouthfeel; the production technology of the acidic milk powder overcomes the detect of the direct dry mixing technology that products have poor dissolubility and overcomes the technical problem that acidic / juice milk is not suitable for being concentrated or spray-dried directly, so that protein does not denature during the spray drying process; and since neither stabilizing agent or juice is concentrated, so that the phenomena of coking on the surface of a heater is avoided. The invention has low manufacturing cost and is applicable to large-scale industrial production.
Owner:BRIGHT DAIRY & FOOD CO LTD

Tibetan medicine composition with function of controlling liver injury, preparation and application

The invention discloses a Tibetan medicine composition, its preparation and application methods. Aiming at the defects of potential hepatotoxicity in some traditional medicinal materials and their preparations in the prior art, the present invention provides a Tibetan medicine composition with the function of preventing and treating liver damage. This product includes 50 parts by weight of myrobalan, 50 parts of saffron, 50 parts of slag taming paste, 100 parts of iron filings made from myrobalan, 50 parts of milk-made cold water stone, 50 parts of Ganqing Qinglan, and 50 parts of woody fragrance. From the perspective of national medicine, this product follows the principle of compatibility of monarch, minister, assistant and envoy, and the compatibility of all prescriptions achieves the effects of promoting qi and blood circulation, calming liver, clearing heat and relieving pain, and has the function of protecting liver and liver. The invention also provides a preparation method of the Tibetan medicine composition and its application in the preparation of products for preventing and treating liver damage. The Tibetan medicine composition of the present invention is prepared by adopting traditional commonly used medicinal materials according to the traditional Tibetan medicine processing method. The original medicine of the medicinal material and the preparation method are safe and reliable, and the types of the original medicine components are few, the production cost is economical, and the preparation method is simple.
Owner:罗追 +1

Elevator suspension rope tension measurement and regulation mechanism

The invention discloses an elevator suspension rope tension measurement and regulation mechanism, which comprises a screw rod with the end part being connected with a suspension rope, and an elastic component, a locking nut, a pressure sensor and a regulation nut sequentially sleeves the screw rod. The elevator suspension rope tension measurement and regulation mechanism also comprises a regulator, wherein the regulator supports the pressure sensor; the regulator is covered on the outer side of the locking nut; the regulator comprises at least one regulation window and at least one regulation hole so as to be convenient to regulate the locking nut. The elevator suspension rope tension measurement and regulation mechanism can conveniently and quickly regulate the locking nut, and can be applicable to locking nuts with different specifications and dimensions.
Owner:SUZHOU BALANCE ELEVATOR TECH CO LTD

Miniature weak charged particle beam detection device

The invention relates to a miniature weak charged particle beam detection device, and the device comprises an electron suppression electrode which is used for suppressing secondary electrons; the beam absorption electrode is used for absorbing the charged particle beam; the signal amplification electrode is used for generating secondary amplified electron flow; the signal absorption electrode is used for detecting and absorbing the total amplified current signal; the electron suppression electrode, the beam absorption electrode, the signal amplification electrode and the signal absorption electrode are sequentially arranged in the head-on charged beam direction, and the working environment of the detection device is a vacuum environment. Compared with the prior art, the method has the advantages of high detection precision, low production cost, easiness in processing and the like.
Owner:FUDAN UNIV

A zinc catalyst for controlled depolymerization using polyester materials and its catalytic method

The invention discloses a zinc catalyst using polyester materials for controllable depolymerization and a catalytic method thereof, belonging to the technical field of polyester depolymerization. The invention solves the problem that complex ligands need to be synthesized for the zinc catalyst used in the alcoholysis of existing waste polyester materials, and the synthesis steps are increased. The catalyst used in the present invention is a bis(hexaalkyldisilazane) zinc catalyst with a simple structure. With the participation of alcohol compounds, the polyester material can be decomposed under mild conditions through the transesterification reaction catalyzed by the catalyst. Polymerization into small organic molecules realizes the reuse of waste polyester. The invention adopts a zinc catalyst to catalyze the depolymerization of the polyester, the metal zinc is non-toxic, colorless, cheap and easy to obtain, and as one of the trace elements of the human body, it has good biocompatibility, and the production process is more green and environmentally friendly; and the catalyst structure is simple and the synthesis steps Less, the production cost is more economical. The catalyst has good universality, and has good depolymerization effects on various polyester materials with different structures.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Method for recovering caprolactone from poly(epsilon-caprolactone) waste

ActiveCN114031600AAchieving targeted recyclingReduce industrial stepsOrganic chemistryPlastic recyclingPolyesterDepolymerization
The invention discloses a method for recovering caprolactone from poly(epsilon-caprolactone) waste, and belongs to the technical field of polyester waste material depolymerization. According to the method, an economical metal catalyst is adopted for catalysis, the poly(epsilon-caprolactone) waste is subjected to depolymerization reaction recovery under the heating and vacuum conditions to obtain the polymeric monomer caprolactone, and directional recovery of the poly(epsilon-caprolactone) waste is achieved. The recycled monomer caprolactone can be directly reutilized, so that the industrial production steps are reduced, the production efficiency is enhanced, the industrial cost is reduced, the sustainable development principle is met, and the environmental pollution is reduced.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Medicinal liquor for treating bone hyperplasia and traumatic injury and preparation and application thereof

The invention discloses medicinal liquor for treating hyperplasia and the traumatic injury. The medicinal liquor is prepared from the following raw materials in medicinal composition: astragalus membranaceus, dendrobe, honeysuckle, chrysanthemum, radix cyathulae, phoenix-tail fern, bock greenbrier rhizome, caulis spatholobi, garden balsam stem, iceberg grass, lycopodium clavatum, safflower, rhodiola rosea, lysimachia sikokiana and white spirit with 55-70 degrees. The medicine is an external formula, has special effects on hand and foot constraint and hand and foot constraint caused by apoplexy sequelae when being used for the traumatic injury, knee joint effusion, synovitis, arthralgia, spinal hyperplasia and caused pain, and has a certain curative effect on skin diseases and vitiligo.
Owner:廖章鼎

Elevator suspension rope tension measurement and adjustment mechanism

The invention discloses a tension measurement and regulation mechanism for a lift suspension rope. The mechanism comprises a screw, an elastic component, a locknut, a pressure sensor and a regulation nut, wherein the end of the screw is connected with the suspension rope, and the elastic component, the locknut, the pressure sensor and the regulation nut are arranged on the screw in a sleeving mode in sequence. The tension measurement and regulation mechanism for the lift suspension rope further comprises a regulator. The pressure sensor is arranged between the regulator and the regulation nut, the regulation nut is provided with a guiding portion, and the guiding portion is located between the screw and the pressure sensor. The tension measurement and regulation mechanism for the lift suspension rope is provided with the regulator and a regulation sleeve which are arranged on the periphery of the locknut in a covering mode, the locknut can be regulated conveniently and quickly, and the mechanism can be suitable for the locknuts with different specifications and sizes. Meanwhile, the special regulation nut is arranged, therefore, not only is output pressure of the pressure sensor more precise, but also the whole structure of the mechanism is simpler, and the production cost is more economical.
Owner:SUZHOU BALANCE ELEVATOR TECH CO LTD

Tension measurement and regulation mechanism for lift suspension rope

The invention discloses a tension measurement and regulation mechanism for a lift suspension rope. The mechanism comprises a screw, an elastic component, a locknut, a pressure sensor and a regulation nut, wherein the end of the screw is connected with the suspension rope, and the elastic component, the locknut, the pressure sensor and the regulation nut are arranged on the screw in a sleeving mode in sequence. The tension measurement and regulation mechanism for the lift suspension rope further comprises a regulator. The pressure sensor is arranged between the regulator and the regulation nut, the regulation nut is provided with a guiding portion, and the guiding portion is located between the screw and the pressure sensor. The tension measurement and regulation mechanism for the lift suspension rope is provided with the regulator and a regulation sleeve which are arranged on the periphery of the locknut in a covering mode, the locknut can be regulated conveniently and quickly, and the mechanism can be suitable for the locknuts with different specifications and sizes. Meanwhile, the special regulation nut is arranged, therefore, not only is output pressure of the pressure sensor more precise, but also the whole structure of the mechanism is simpler, and the production cost is more economical.
Owner:SUZHOU BALANCE ELEVATOR TECH CO LTD

A kind of anisotropic piezoelectric ceramic material and preparation method thereof

The invention provides an anisotropic piezoelectric material and a preparing method thereof. The composition chemical formula is as follows: [(1-x) (0.7PbZrO3 - 0.3K0.5Bi0.5TiO3) - xPbTiO3] + yPbZnNb2O5, x = 0.25 - 0.30, y = 0.01 - 0.20. The preparing method comprises the following preparing steps: mixing materials by a mass molar in the formula, ball-grinding by a wet method, briquetting after drying and synthesizing; synthesizing blocks after coarse grinding, carrying out secondary wet ball grinding, and pelletizing polyvinyl alcohol after drying; feeding degummed biscuits in an aluminum oxide crucible and sintering into ceramic; carrying out electrode oil bath polarization on the ceramic to obtain the anisotropic piezoelectric material. The material has high anisotropism, the piezoelectric strain coefficient in the polarization direction is larger than the piezoelectric coefficient in the non-polar direction, and the isostatic pressing piezoelectric sensitivity is as high as 40*10<-3> V.m / N and much higher than that of a lead zirconate titanate piezoelectric material. The material ingredients are reasonable and are easy to sinter and polarize, and the material is particularly suitable for manufacturing high-sensitivity and high-resolution hydrophones.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI

A laminated anti-evaporation and water-retaining film

The invention discloses a laminated covering film water retention device. The laminated covering film water retention device is characterized in that the surface of a water area is covered with two laminated covering films which are insoluble in water, are provided with a lot of through holes and can move oppositely, and the specific weight of the two laminated covering films is smaller than one. The upper covering film of the two covering films is an overall covering film formed in a composite mode by sandwiching a material gridding small in thermal expansion coefficient into two material films large in thermal expansion coefficient, so that the upper covering film is large in thermal expansion coefficient; the lower covering film is small in thermal expansion coefficient and good in heat-insulating property. A hook and loop fastener mode that small pieces of films are fastened piece by piece to form the large pieces of covering films is adopted for the covering films. After the water area is covered with the covering films, water only evaporates through the parts with the through holes. During the drought at the high temperature, the upper covering film expands with heat so that film holes in the upper covering film can shrink to reduce evaporation amount. When the temperature drops on a rainy day, the film holes in the upper covering film and the lower covering film expand so that rainwater can pass through the film holes smoothly to flow into the water area. The covering film is provided with the countless through holes to ensure gas exchange in the water area. The laminated covering film water retention device is simple in structure, low in cost and capable of effectively reducing the evaporation amount of water to play a role in water retention and protection against drought.
Owner:姜立平

Small-range tunnel horizontal plane model tester system for realizing multistage and master control loading

InactiveCN101696913BSolve technical problems such as loading failureSimple assembly principleStructural/machines measurementForce measurement by elastic gauge deformationSteel ballEngineering
The invention relates to a small-range tunnel horizontal plane model tester system for realizing multistage and master control loading, comprising a loading inside casing realizing direct applying and load transferring, a reaction frame outline border providing test reaction support and a bolt machinery meshed jacking and high-sensitivity pull pressure sensor measurement cooperating combined loading device, wherein the reaction frame outline border and the loading inside casing are connected by the loading device to form an integral box system; the loading inside casing employs an iterative structure of a wood board and a steel board; steel balls and self-locking screws are distributed on the wood board; a square well-shaped steel tube in the reaction frame outline border is pressed on an organic glass cover board; a bottom loaded plate is arranged on the bottom of the whole system; a bolt and a high-strength nut in the loading device are in cooperative installation; and one end of the bolt is embedded into the high-sensitivity pull pressure sensor. Due to adopting the structure, the invention solves the technical problems that the prior jack can not realize small-range and high-precision side loading and meanwhile improves the problem of loading abrasion of the loading inside casing, thereby increasing the operability and the measurement precision of tests.
Owner:TONGJI UNIV

Vehicle drive unit

The invention provides a vehicle running mechanism provided with a tensioned helical spring frame which supports and is arranged between two spring seats and a cushioning device. A piston rod and / or apart of a cushioning device casing pipe is arranged inside the helical springs. At least one spring seat can move in the axial direction through an annular motor consisting of a stator and a rotor and a driver element comprising a transmission gear consisting of a lead screw nut and a lead screw. One end of a lead screw nut and at least one part of the lead screw is arranged in the helical springs in the radial direction; and the other end is radially arranged in the area, into which the annular motor extends in the axial direction.
Owner:THYSSENKRUPP PRESTA AG
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