44results about How to "Reduce the rate of descent" patented technology

The invention discloses a subsection well completion system of a bottom water reservoir horizontal well, in particular to a special well completion system for a horizontal well, belonging to the field of petroleum drilling well completion. The invention aims to provide a well completion system for reducing the pressure drop rate, stabling oil, controlling water, preventing sand, blocking water, improving the oil extraction rate and reducing the well completion expense. A release joint at the root end of the horizontal well is connected with a first section of novel flow-controlling sieve tube; a novel flow-controlling sieve tube section and a casing section are alternated; a packer is arranged between the novel flow-controlling sieve tube section and the casing section; a safe joint is arranged behind a first sieve tube of the novel flow-controlling sieve tube section; a plug is arranged at the tail end of a well completion tubular column; and spring centralizers keep away from the packer and are arranged on the whole well completion tubular column at equal interval. The key part is the novel flow-controlling sieve tube. The technical scheme has the essential points that subsection well completion is implemented on the bottom water-oil reservoir according to the oil reservoir characteristics and a borehole track. The invention has the characteristics of reducing pressure, stabilizing oil, controlling water, preventing sand, improving the recovery ratio and having high economic performance and is applicable for well completion of the bottom water reservoir horizontal well.

The preparation process of active lactic acid bacteria beverage includes the following steps: mixing whole milk powder, water in 8-9 times water of the whole milk powder, sugar in 7 wt% of milk powder plus water, and trehalose in 1 wt% through stirring to obtain material milk; homogenizing at 20-30MPa, heating at 90-95deg.C while stirring to sterilize for 30-60 min, cooling to below 37deg.c, adding lactic acid bacteria seed while stirring, sterile filling and sealing; fermentation at 42-45deg.c for 3-12 hr or at 35-38deg.c for 60-120 hr; and cold storing at 4deg.c to obtain the active lactic acid bacteria beverage, which has high lactic acid bacteria stability and no acidifying in the preservation period.

The invention provides steel fiber and high-performance synthetic fiber mixed toughened RPC (reactive powder concrete) and a preparation method, belonging to the technical field of concrete. The toughened RPC is characterized in that raw materials include Portland cement, superfine cement, admixtures, additives, steel fibers, coarse polypropylene fibers, fine polyvinyl alcohol fibers and water; the water-binder ratio is 0.18-0.21; the Portland cement and the superfine cement respectively account for 17-20% and 8-9% of total concrete by mass; the steel fibers, the coarse polypropylene fibers and the fine polyvinyl alcohol fibers respectively account for 1-3%, 1.2-1.7% and 0.3-0.6% of the whole concrete by volume. The preparation method comprises the steps of pouring sand and powder into a stirrer to be stirred uniformly, then adding the additives and water, mixing the fibers and stirring the materials when the stirred materials are changed to colloids from granules, pouring after the fibers are dispersed uniformly, and carrying out vibratory compaction or vibration molding and curing. The toughened RPC and the preparation method have the beneficial effects that the mechanical toughness of the RPC can be improved, and the economical efficiency and wide applicability of the material can be improved.

The invention discloses a method for producing cellulase by trichoderma reesei fermentation. The method is characterized in that in a trichoderma reesei fermentation culture stage, a mixture of an induction carbon source and a nitrogen source is fed in a fed-batch manner, and preferably, the fed-batch feeding time is 24-26h after fermentation. The induction carbon source is obtained by mixing a biomass material enzymolysis product and a sophorose inducer according to a ratio of (3-5): (7-9), and the nitrogen source is a mixture of corn steep liquor and ammonium sulfate. The method has the advantages that the adding amount of phosphate in a trichoderma reesei fermentation culture medium is optimized, and production of the cellulase by the trichoderma reesei through permentation is performedwith low culture medium cost; the optimal nitrogen source feeding ratio is selected, so that the nitrogen source cost is saved; and the carbon-nitrogen ratio in the feeding process is strictly controlled, so that the trichoderma reesei can synthesize the cellulase at high yield.

The invention relates to a PVDF ultrafiltration membrane modified with a visible light photocatalyst and a preparation method and application thereof. The ultrafiltration membrane is a PVDF ultrafiltration membrane modified by a CdS / g-C3N4 / rGO nano photocatalyst. In the ultrafiltration membrane, PVDF is used as a matrix, the CdS / g-C3N4 / rGO nano photocatalyst is used as an active component, and theactive component is uniformly distributed in the matrix. The ultrafiltration membrane is prepared from the following components by weight: 17 to 19 parts of polyvinylidene fluoride, 2.5 to 3.5 partsof polyvinylpyrrolidone, 77 to 79 parts of N,N-dimethylacetamide, and 0.3 to 1.3 parts of the CdS / g-C3N4 / rGO nano photocatalyst. The modified PVDF ultrafiltration membrane is applied to resisting membrane organic pollutants or resisting bacteria. Compared with the prior art, the modified membrane provided by the invention is high in hydrophilicity and good in photocatalytic activity, membrane poreblocking caused by organic pollutants can be effectively reduced under visible light irradiation, the good killing effect is provided for Gram-negative bacteria represented by Escherichia coli and Gram-positive bacteria represented by Staphylococcus aureus, the formation of biological film on the membrane surface can be significantly inhibited, and the good synchronous anti-pollution and antibacterial effects are provided.

The invention relates to a construction and installation mechanism and method for a fire-fighting vertical pipe in a floor. The mechanism comprises a vehicle body, a movable base arranged on the vehicle body, a fixed column fixed to the movable base and vertically arranged, a clamping frame fixed to the fixed column and used for clamping a firefighting vertical pipe, a pushing handrail fixed to the vehicle body and a pushing handle fixed to the fixed column, wherein the movable base comprises a pushing base slidably installed on the top of the vehicle body and a lifting base slidably installedon the pushing base, the fixed column is connected with the lifting base, and the bottom face of the lifting base is in sliding fit with the upper surface of the vehicle body; a lifting groove is formed in the upper surface of the vehicle body, and a slowing device used for slowing down the descending speed of the lifting base is arranged in the lifting groove. The floor plate has the effect of preventing the floor plate from being damaged due to installation of the fire-fighting vertical pipe.

The present invention discloses a feather scalding machine convenient for classification scalding of domestic poultry. The feather scalding machine comprises a support frame and an outer cylinder. Theoutside of the outer cylinder is covered with an insulation layer; three support legs are fixed on the outer circumference of the outer cylinder; the three support legs are distributed around the outer cylinder in an annular array distribution; the ends of the three support legs far away from the outer cylinder are all connected with the support frame; the support frame is located under the outercylinder; besides, the support frame is provided with a motor, a water purifying box and a high-pressure water pump; the water purifying box is located between the motor and high-pressure water pump;besides, the motor and high-pressure water pump are both electrically connected to an external power source; the water purifying box is connected with the outer cylinder via a pipeline; and besides,a filter net is arranged inside the outer cylinder. Two inner cylinders are arranged; one of the inner cylinders is connected with the motor; the other inner cylinder is in a movable structure; besides, the two inner cylinders are both in mesh structures; the second inner cylinder is used for placing the domestic poultry; and the first inner cylinder is responsible for driving the rotation of thesecond inner cylinder, thereby achieving the uniform scalding of the domestic poultry.

The invention discloses a preservation method for processing sweet cherry by salicylic acid. The method comprises the following steps: soaking sweet cherry fruits with uniform size and without mechanical injury in an aqueous solution of salicylic acid, taking out the sweet cherry fruits, and airing; and putting the aired sweet cherry fruits into an open PVC (polyvinyl chloride) film bag, storing at 4 DEG C and with relative humidity of 78% for 6h, binding the bag, and storing at 4 DEG C. The analysis on the change of some sensory quality of fruits during storage after picking and on the change of catalase activity, peroxidase activity, phenylalnine ammonialyase and other related enzymatic activity proves that through the treatment with salicylic acid, the water loss rate and the total soluble solid decrease rate of sweet cherry in the storage process can be effectively lowered, the rotting rate of sweet cherry is lowered, the high commercial value and edible value of sweet cherry can be kept for a long time, the capability of resisting outside threat, especially threat of microorganism infection, of sweet cherry is enhanced, the preservation effect is obviously superior to that of a control group, and the storage performance of sweet cherry is improved. The method is a safe, effective and simple preservation method of sweet cherry.

The invention provides a storing and preserving method for waxberries, and belongs to the technical field of agricultural product storage. The storing and preserving method includes storing the waxberries in a low temperature environment through a space electric field, further includes the following steps: 1) screening the waxberries, uniform in size and shape and free of pests and diseases, afterpicking; 2) soaking the waxberries in a regulator containing phytosterol and geranylgeraniol; 3) storing and preserving the waxberries in a refrigerator preset with the space electric field and a temperature. The storing and preserving method for the waxberries has the advantages that the consumption of nutrients in fruits can be reduced, damage of endogenous enzymes in the fruits to textures ofthe waxberries can be relieved, redox reactions of the fruits themselves can be inhibited, the freezing point of the waxberries is reduced to alleviate chilling injury symptoms of the waxberries, theaccumulation of secondary metabolite anthocyanin, carotene and flavonoid compounds is promoted, and accordingly, the waxberries have long storage period and high nutritional value.

The invention discloses a system for collecting and treating silt in front of a dam, which comprises a silt collecting system at the bottom of a dam, a device for filtering and collecting floating sand and garbage in water, lifting equipment and equipment for reprocessing the silt. The system can deal with the sedimentation in front of the dam in time. After reaching a certain sedimentation depth, the sediment can be allowed to enter the collection device in time, so that the height of the sedimentation will not increase further, effectively reducing the rate of decline in the storage capacity of the reservoir. The floating sand can also be collected and processed to reduce the amount of sediment deposition, and the cleaned-up sediment and garbage can be pre-screened to achieve the purpose of reuse. According to the two different distributions of sediment, the sediment in the water body in front of the dam is treated separately, and the floating sand is treated by guiding the silt at the bottom of the dam to a specific collection location and imitating the process of whale predation, so as to clean up the front of the dam in time The purpose of silting is more efficient and timely.

The invention discloses a Chinese herbal compound for treating idiopathic pulmonary fibrosis as well as a preparation method and application thereof. The Chinese herbal compound is 'wheat flavor lungnourishing soup', which is prepared from twelve traditional Chinese medicine raw materials such as schisandra chinensis, codonopsis pilosula, radix ophiopogonis, fructus perillae, roasted ephedra herb, aster, pericarpium citri reticulatae, ginger processed pinellia, asarum, roasted radix scutellariae, angelica sinensis and roasted licorice roots. A clinical experiment shows that clinical symptomsof an idiopathic pulmonary fibrosis patient, particularly a patient suffering from deficiency of both vital energy and yin, can be obviously improved, the living quality is improved, and the exercisetolerance is enhanced; the Chinese herbal compound is high in safety, and can reduce the lowering rate of the lung functions to a certain extent.

The invention relates to the related technical field of manufacturing machinery, and discloses a transfer device for charcoal processing. The transfer device comprises a box body, a material storage cavity is formed in the inner wall of the box body, a feeding frame communicating with the material storage cavity is fixedly installed on one side of the surface of the box body, a discharging baffle connected through a hinge is arranged at the bottom of one side of the box body, carrying wheels are fixedly installed at the bottoms of the two sides of the box body correspondingly, a pushing handle is fixedly installed at the top of one side of the box body, material conveying frames located in the material storage cavity are fixedly installed on the front side and the rear side of the inner wall of the box body, the material conveying frames are located below the feeding frame, and a diffusion plate is fixedly installed at the top of the inner wall of the box body. The material conveying frames are arranged in the box body, meanwhile, the diffusion plate is arranged at the top of the box body, and therefore when charcoal is input from the material conveying frames, the descending speed of the charcoal is reduced through suction force of the diffusion plate, meanwhile, dust on the surface of the charcoal is sucked out, and finally the purposes of reducing the falling impact speed and conducting efficient cleaning are achieved.

The invention discloses a goods fixing frame. An inner pipe is inserted into an outer pipe, and can reciprocate relative to the outer pipe; a row of concave parts are formed on the wall of the inner pipe along the length direction; the outer pipe is fixed with a base which is pivoted with a grip and a ratchet wheel; the grip swings relative to the base to drive the ratchet wheel to rotate, so that a plurality of teeth enclosing the ratchet wheel are clamped into the corresponding concave parts to drive the inner pipe to move outwards; and the base is provided with a stopper having a stopping effect on the rotating ratchet wheel. The stopper is arranged to have the stopping effect on the rotating ratchet wheel, the descending rate of the inner pipe is reduced, and accidents are avoided to ensure the using safety.

The invention relates to a CdS / MIL-101 (Cr) photocatalyst modified PVDF ultrafiltration membrane, a preparation method and applications thereof. According to the invention, in the ultrafiltration membrane, PVDF is used as a matrix, a CdS / MIL-101 (Cr) photocatalyst is used as an active component, and the active component is uniformly distributed in the matrix; the modified PVDF ultrafiltration membrane is prepared from the following components by weight: 17-19 parts of polyvinylidene fluoride, 2.5-3.5 parts of polyvinylpyrrolidone, 76-80 parts of N,N-dimethylacetamide and 0.5-1.5 parts of a CdS / MIL-101 (Cr) photocatalyst; the modified PVDF ultrafiltration membrane is applied to membrane-resistant organic pollutants or resisting bacteria; and compared with the membrane in the prior art, themodified membrane provided by the invention is high in hydrophilicity and good in photocatalytic activity, can effectively reduce the membrane pore blocking caused by organic pollutants under visiblelight irradiation, has good killing effects on Gram-negative bacteria represented by Escherichia coli and Gram-positive bacteria represented by Staphylococcus aureus, can significantly inhibit the formation of membrane surface biological membranes, and further has good synchronous anti-pollution and antibacterial effects.

The invention relates to the technical field of pharmaceutical production equipment, in particular to a grinding and polishing machine for a medicine capsule. The grinding and polishing machine for the medicine capsule comprises a machine body, a feeding mechanism and a waste collecting mechanism, wherein the feeding mechanism is under the machine body, and the waste collecting mechanism is underthe machine body. A grinding and polishing device is arranged in the machine body. The grinding and polishing device comprises a rotating shaft, a coarse throwing bucket and a fine throwing bucket, wherein the coarse throwing bucket is fixedly connected with the rotating shaft, and the fine throwing bucket is arranged on the lower portion of the coarse throwing bucket. A spiral material returningblade is arranged in the coarse throwing bucket. A first bushing is arranged in the outer surface of the fine throwing bucket, and the first bushing is a spiral shape. The inner surface of the fine throwing bucket is provided with a second bushing, and the second bushing and the first bushing are in an opposite spiral shape. The upper portion of the machine body is provided with a first driving motor which is used to drive the rotating shaft to rotate. According to the graded polishing toward the capsule, the polishing effect of the capsule is improved. The rotating shaft is arranged into a hollow structure, the air flow inside the rotating shaft improves the air selection of the capsule only with a shell, and the effect of air selection and polishing is good.

The invention relates to an electronic atomization device control method, device and system and an electronic atomization device, in the process of providing working voltage for an atomizer of the electronic atomization device, an output voltage sampling value of a pulse booster circuit can be obtained in real time, and analysis is conducted in combination with preset battery cell voltage. If the output voltage sampling value is between the preset battery cell voltage and the preset voltage threshold value, performing pulse boost regulation and control on the pulse boost circuit by adopting a first regulation and control mode; and if the output voltage sampling value is greater than the preset voltage threshold value, performing pulse boosting regulation and control on the pulse boosting circuit by adopting a second regulation and control mode so as to slow down the reduction rate of the output power output to the atomizer by the pulse boosting circuit. When the voltage of the battery cell of the electronic atomization device is insufficient, the electric quantity loss of the battery cell can be effectively reduced in a feedback regulation mode, so that the decline rate of the output power is slowed down, and the situation that the difference between the working states of the front and back electronic atomization devices is large due to large output power change is avoided.

The invention discloses a fresh keeping method of russula lepida with kojic acid. The method comprises the following steps of selecting russula lepida which is free from diseases and insect pests, free from mechanical damage, uniform in color and consistent in maturity, putting the selected russula lepida in a kojic acid solution, performing soaking for 8-14min, taking out the soaked russula lepida, performing draining to remove excessive moisture, and performing natural airing. Compared with the prior art, the method disclosed by the invention has the advantages that soaking treatment with kojic acid is performed, so that the moisture dissipation of the russula lepida during a storage period can be delayed, occurrence of brown stains can be reduced, the descent rate of the content of amino acids in the russula lepida can be retarded, and the storage time of the russula lepida can be prolonged; besides, 0.1-0.3% of leucine is added to the kojic acid solution, so that the bacteriostasiseffect of the kojic acid solution can be further strengthened, and the occurrence of the brown stains can be effectively reduced; and kojic acid sources are rich, the fresh keeping method of russulalepida disclosed by the invention is low in cost and easy to operate, and has wide application prospects.

The invention relates to the technical field of feeding mechanisms, in particular to a feeding device used for rice storage and capable of screening out impurities in rice. The feeding device comprises a device main body, wherein the device main body comprises a feeding machine, a first fixing plate is fixedly connected to the inner wall of the feeding machine, a feeding port is fixedly connected to the top end of the feeding machine, a discharging port is fixedly connected to the bottom end of the left side of the feeding machine, a flow guide block is fixedly connected to the inner wall of the right end of the feeding machine, a screening mechanism is arranged in the feeding machine and comprises a second fixing plate, the second fixing plate is fixedly connected to front end of the feeding machine, and a motor is fixedly connected to the top end of the second fixing plate. According to the feeding device, rice can be well screened, meanwhile, a quantitative blanking mechanism and a quantitative discharging mechanism are further arranged, one power source is shared, certain resource input is saved, the practicability and economic benefits of the device are greatly improved, meanwhile, the whole process of the device is formed, and the device can automatically complete cyclic screening.

The invention discloses a high-precision wear resistant steel ball efficient screening device. The device comprises a base plate, a fixed plate, a material box, a fixed frame and a baffle plate, and is characterized in that the base plate is arranged on a bracket; a stand plate is arranged on the base plate; the fixed plate is arranged at the top end of the stand plate; the material box is arranged on the base plate; connecting screw rods are arranged on two opposite sides of the fixed frame; a positioning screw rod is vertically arranged at the top of the fixed frame; a screening groove is formed in the fixed frame; a discharge cavity is formed in the bottom of the fixed frame; the connecting screw rods penetrate through a limiting groove; and the baffle plate is fixed on the positioningscrew rod through a connecting bolt. A spring is arranged on the positioning screw rod between the fixed frame and the baffle plate; and through the spring, the buffer performance of the baffle plateon the positioning screw rod of a fixed block is improved, and the position of the baffle plate on the positioning screw rod can be adjusted, so that the distance between the fixed frame and the baffle plate is adjusted, the application range of the screening device is widened, and the cost of producing multiple sets of screening devices is reduced.

The invention discloses a heat slow-release element with a layered structure, and application of the heat slow-release element in a thermal battery, and belongs to the technical field of thermal batteries. The layered structure heat slow-release element disclosed by the invention is sequentially provided with an oxidant layer, a lithium-permeable thin layer and a reducing agent layer, the lithium-permeable thin layer is constructed by adopting an ion-electron conductor, and the transmission speed of lithium in the lithium-permeable thin layer is controlled, so that the reaction speed between the oxidant and the reducing agent in the heat slow-release element is controlled, the heat release rate of the heat slow-release element is further controlled, and the internal temperature of the thermal battery is accurately controlled, so that when the heat slow-release element with the layered structure is applied to the thermal battery product, the performance of the battery is obviously improved, and the thermal battery has a wide application prospect.

The invention relates to a polyvinylidene fluoride mixed matrix membrane with photocatalytic performance as well as preparation and an application thereof. A preparation method comprises the followingsteps: preparing a membrane casting solution from polyvinylidene fluoride, and blade-coating the membrane casting solution on a substrate; and putting the substrate with the membrane casting solutioninto a gel bath in which SnO2-Cu2O is dispersed, and realizing adhesion of SnO2-Cu2O on the surface of the matrix membrane through a delayed phase conversion process to obtain the polyvinylidene fluoride mixed matrix membrane. Compared with the prior art, the PVDF ultrafiltration membrane adhered with the SnO2-Cu2O photocatalyst prepared by the invention has higher hydrophilicity and remarkable photocatalytic performance compared with the traditional PVDF ultrafiltration membrane; Cu2O and SnO2 are combined to form a heterojunction structure, the photo-corrosion phenomenon of SnO2 is avoidedwhile the photo-response performance of Cu2O and SnO2 is improved, the electron transmission rate of Cu2O is increased due to addition of Cu2O, the visible light response capacity of SnO2-Cu2O is effectively promoted, the good anti-pollution effect is achieved under visible light irradiation, the membrane pollution phenomenon can be effectively reduced, and the reduction rate of the membrane fluxis reduced.

The invention discloses a subsection well completion system of a bottom water reservoir horizontal well, in particular to a special well completion system for a horizontal well, belonging to the field of petroleum drilling well completion. The invention aims to provide a well completion system for reducing the pressure drop rate, stabling oil, controlling water, preventing sand, blocking water, improving the oil extraction rate and reducing the well completion expense. A release joint at the root end of the horizontal well is connected with a first section of novel flow-controlling sieve tube; a novel flow-controlling sieve tube section and a casing section are alternated; a packer is arranged between the novel flow-controlling sieve tube section and the casing section; a safe joint is arranged behind a first sieve tube of the novel flow-controlling sieve tube section; a plug is arranged at the tail end of a well completion tubular column; and spring centralizers keep away from the packer and are arranged on the whole well completion tubular column at equal interval. The key part is the novel flow-controlling sieve tube. The technical scheme has the essential points that subsection well completion is implemented on the bottom water-oil reservoir according to the oil reservoir characteristics and a borehole track. The invention has the characteristics of reducing pressure, stabilizing oil, controlling water, preventing sand, improving the recovery ratio and having high economic performance and is applicable for well completion of the bottom water reservoir horizontal well.

The invention specifically provides a remediation technological device for micro-polluted underground water. The remediation technological device comprises a cylindrical shell, a plasma oxidation device, a photocatalyst, an ultraviolet lamp and a quartz glass protection cover. A spraying gun of the plasma oxidation device is used for transmitting plasmas sprayed by the spraying gun to a plasma cylindrical container through a pipeline; the plasma storage cylindrical container is arranged in an inner cavity of a cylindrical shell in a sleeving manner; a space is formed between an inner side wallof the cylindrical shell and an outer side wall of the plasma storage cylindrical container; a columnar cavity formed by the inner side wall of the plasma storage cylindrical container is a repairinggroove body for treating the micro-polluted underground water. The photocatalyst is arranged in the space between the outer side wall of the plasma storage cylindrical container and the inner side wall of the cylinder. The ultraviolet lamp sleeves a central shaft of the plasma storage cylindrical container. According to the device provided by the invention, the surface of the photocatalyst can beactivated through the plasmas, so that the lowering speed of the activity of the photocatalyst is greatly reduced. Therefore, the number of times of replacing the photocatalyst can be reduced and theworking time is saved.

The invention relates to the technical field of pharmaceutical production equipment, in particular to a grinding and polishing machine for a medicine capsule. The grinding and polishing machine for the medicine capsule comprises a machine body, a feeding mechanism and a waste collecting mechanism, wherein the feeding mechanism is under the machine body, and the waste collecting mechanism is underthe machine body. A grinding and polishing device is arranged in the machine body. The grinding and polishing device comprises a rotating shaft, a coarse throwing bucket and a fine throwing bucket, wherein the coarse throwing bucket is fixedly connected with the rotating shaft, and the fine throwing bucket is arranged on the lower portion of the coarse throwing bucket. A spiral material returningblade is arranged in the coarse throwing bucket. A first bushing is arranged in the outer surface of the fine throwing bucket, and the first bushing is a spiral shape. The inner surface of the fine throwing bucket is provided with a second bushing, and the second bushing and the first bushing are in an opposite spiral shape. The upper portion of the machine body is provided with a first driving motor which is used to drive the rotating shaft to rotate. According to the graded polishing toward the capsule, the polishing effect of the capsule is improved. The rotating shaft is arranged into a hollow structure, the air flow inside the rotating shaft improves the air selection of the capsule only with a shell, and the effect of air selection and polishing is good.

The invention discloses feed suitable for free-range laying hens in the technical field of feed production. The feed comprises the following raw materials in percentage by weight: 62-67% of corn, 18-24% of soybean meal, 0-6% of bran, 4-8% of stone powder and 3-7% of a premix, wherein the sum of the weight percentages of the raw materials is 100%. An eggshell powder is added in the feed. The pecking effect is affected due to different sizes of shell powder, bone meal and the like, and other fine powdery calcium feed are not suitable for supplementary feeding, so that the calcium feeding effectof the free-range laying hens is poor when the free-range laying hens eat the feed, and the problem can be effectively solved by additionally adding 4% of the eggshell powder in the premix. The addedeggshell powder is sufficient in the content of inorganic salts, the content of calcium carbonate is about 95%, the total content of magnesium carbonate and calcium phosphate is about 4%, and the balance is a small amount of organic substances, so that the calcium content in the feed is supplemented, the feed is easily absorbed by the free-range laying hens, the growth and development of the free-range laying hens are promoted, and the egg yield is improved.

The invention relates to the technical field of interlocking protection, in particular to an interlocking protection method for a high-pressure steam pipe network. The method comprises the following steps that a residual workload of a running boiler is increased according to a trip signal of the boiler; and when gas pressure / flow in the high-pressure steam pipe network reaches a preset pressure value / flow value, preset time is delayed to trigger interlocking, and user equipment is gradually stopped according to a preset stopping priority. According to the scheme of method, after tripping of the boiler, the residual workload of the running boiler is increased, a descending speed of the material pressure / flow in the high-pressure steam pipe network is reduced, interlocking is delayed to be triggered after the gas pressure / flow in the high-pressure steam pipe network is lower than the preset value, then the user equipment is stopped step by step according to a preset sequence, the situation that high-pressure steam is interrupted or unbalanced when the boiler stops in an unplanned mode is prevented, and great load reduction or large-area shutdown of the user equipment is avoided.

The invention relates to a PVDF ultrafiltration membrane modified by a visible light photocatalyst and its preparation method and application. The ultrafiltration membrane is CdS / g-C 3 N 4 / rGO nano photocatalyst modified PVDF ultrafiltration membrane, in the ultrafiltration membrane, PVDF is used as the matrix, CdS / g‑C 3 N 4 / rGO nano photocatalyst is used as the active component, and the active component is evenly distributed in the matrix; the ultrafiltration membrane is prepared from components including the following parts by weight: 17-19 parts of polyvinylidene fluoride, 2.5-3.5 parts of polyvinylpyrrolidone Parts, N,N-Dimethylacetamide 77-79 parts, CdS / g-C 3 N 4 / rGO nano photocatalyst 0.3-1.3 parts; modified PVDF ultrafiltration membrane is used in anti-membrane organic pollutants or antibacterial. Compared with the prior art, the modified membrane provided by the invention has high hydrophilicity and good photocatalytic activity, and can effectively reduce membrane pore blockage caused by organic pollutants under visible light irradiation, and is resistant to Gram bacteria represented by Escherichia coli Negative bacteria and Gram-positive bacteria represented by Staphylococcus aureus have a good killing effect, can significantly inhibit the formation of biofilm on the membrane surface, and have good simultaneous anti-pollution and antibacterial effects.

The invention discloses a passive-assisted flexible bionic tension-compression body ankle-foot joint prosthesis based on changes in air pressure, which includes an ankle joint and a foot; the foot includes a foot support lower bottom plate, a foot support upper top plate, a foot Foot support front assembly, foot support rear assembly, foot upper bearing plate, foot front air cavity, foot rear extrusion air cavity, foot force middle component front air cavity, foot force middle component Rear air cavity. In the bionic design of the flexible prosthesis of the present invention, the method of applying the working principle of the tension and compression body of the human skeleton to the design of the prosthesis is more in line with the natural characteristics of the human body, can effectively improve the natural gait of the human body, and provides a new method for the design of flexible prostheses today. Feasible ideas and methods to help the development of future prosthetics design.

The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to a high-catapult-assisted take-off intelligent unmanned aerial vehicle which comprises a flight mechanism, a protection mechanism, a balance mechanism and an injection mechanism. The protection mechanism comprises a storage box installed on the flight mechanism and used for storage, a first spring connected into the storage box and an installation frame connected with the other end of the first spring. In the invention, through the protection mechanism, an air bag can be opened after emergency landing of the flight mechanism, and the flight mechanism is wrapped by the air bag, so that the damage caused by collision of the flight mechanism to the bottom surface can be effectively reduced, and meanwhile, the air bag segmented structure is utilized, so that air inflation can be performed step by step, and the air bag and the flight mechanism are prevented from being clamped due to non-uniform air intake; the air bag can gradually and stably wrap the flight mechanism, the safety is higher, storage is convenient, normal use of the flight mechanism is not affected, the structural design is novel and reasonable, and application and popularization are convenient.

The invention relates to the technical field of lifting devices, in particular to a powerful sling for an emergency elevator. The powerful sling for the emergency elevator comprises a sling body and further comprises a mounting frame, a clamping mechanism and a buffering mechanism, and a through hole is formed in the mounting frame; the clamping mechanism is erected on the mounting frame; and the buffering mechanism is connected with the clamping mechanism. According to the powerful sling for the emergency elevator, a speed measuring device is used for monitoring the movement speed of the sling, when the speed exceeds the standard, the clamping mechanism is started, a round roller is clamped through a pressing claw, the friction force borne by the round roller is increased, and therefore the round roller is prevented from rotating rapidly, and the movement speed of the round roller is reduced; while the clamping mechanism clamps the round roller, the buffering mechanism can be driven to clamp the sling, and the sling is rubbed through anti-slip strips arranged on arc-shaped clamps, so that the descending speed of the sling under the action of the gravity of the elevator is reduced.