101results about How to "Avoid Secondary Hazards" patented technology

The invention relates to a device and method of battery pack balance and protection. The device comprises a main system control unit, an upper computer unit, a programmable high voltage charging unit,a low voltage constant voltage charging unit, a lower computer, a cell detection unit, a hardware protection circuit, a cell unit, a relay and the like. The main system control unit is in charge of receiving an external operation, displaying the current state, controlling the working state of the upper computer unit, receiving information returned by the upper computer unit and conducting corresponding disposal according to the returned information; after receiving control of the main system control unit, the upper computer unit automatically detects other units and uploads detection and processing results to the main system control unit; under cooperative control of the unit, it is ensured that the charging and discharging circulation frequencies and the depths of all cells are generallyconsistent, safety accidents caused in the charging and discharging process of the battery pack are avoided, so that the reliability of the battery pack is improved by a large margin, and the circulation life of the battery pack is prolonged by a large margin.

The invention discloses a lithium ion battery flame-retardant and explosion-proof device and method for an electric automobile. The lithium ion battery flame-retardant and explosion-proof device comprises a signal acquiring module, a signal processing module and a control terminal part, wherein the signal acquiring module comprises temperature sensors and position sensors which are distributed in different functional regions in a battery box; the signal processing module is used for receiving acquired signals transmitted by the temperature sensors and the position sensors, and transmitting a control signal to a control terminal according to processing results of the acquired signals; the control terminal comprises a physical cooling module, an overcurrent and short-circuit working condition management module and a battery collision/extrusion management module; the physical cooling module comprises fans and a fan power supply system, wherein the fans are arranged in different functional regions in the battery box; the overcurrent and short-circuit working condition management module comprises a battery box safety circuit starting module and two redundant direct-current contactors arranged on a main loop in the battery box; and the battery collision/extrusion management module comprises a module for controlling the direct-current contactors to be switched off, a compressed dry ice air bag and an ejection system of the compressed dry ice air bag.

The invention relates to the field of charging and changing, and particularly relates to an isolation system for a charging and changing station battery pack, a charging and changing station and an isolation method, so as to solve the problems that the existing battery pack thermal runaway fire control method is low in positioning precision and poor in fire extinguishing effects. The charging andchanging station comprises a battery rack, and multiple battery packs are stored on the battery rack. The isolation system comprises an acquisition subsystem, a battery transporting subsystem and a control subsystem, wherein the acquisition subsystem is at least used for acquiring the thermal runaway information of the battery pack; the battery transporting subsystem is used for transporting a thermal runaway battery pack to an isolation position; and the control subsystem is connected with the acquisition subsystem and the battery transporting subsystem respectively for controlling the battery transporting subsystem to transport the thermal runaway battery pack to an isolation position when the battery pack is in a thermal runaway state. Through the above arrangement mode, a battery packwith thermal runaway can be accurately positioned and the battery pack with thermal runaway is transported to the isolated position, the positioning precision of the isolation system is improved, andsecondary hazards can be effectively avoided.

The invention discloses a pier protection device for a bridge in a debris flow channel. Aiming at the defects that an existing product is unfavorable in long-term use and high in maintenance and replacing cost, the pier protection device is of a semi-enclosing structure enclosing a pier and is fixed in a channel through vertical columns; the front end of the pier protection device serves as a water-coming tip with the included angle being theta, and the tail ends of two water-coming tip bevels of the water-coming tip extend backwards in the channel direction to form side bars; and the pier protection device is of a fence structure with transverse fence bars. The invention further provides a design method of the pier protection device. The design method is used for scientific design of important parameters such as the interval D of the fence bars, the height H of the protection device, the width B of the protection device, and the length L of the side bars. According to a product of thepier protection device, the movement state of debris flow can be changed only in a very small area at a pier, the pier protection device overall has the functions of protection of trapping coarse sand and discharging fine sand and homeopathic dredging, and secondary hazards are prevented; the product is concise in structure, convenient to mount, low in production and maintenance cost and capableof being used for a long term; and the matched design method is scientific and reasonable.

The invention discloses a preparation method for a halogen-free flame-retardant rubber composite. The method comprises the following steps: A, forming Al(OH)3 nanoparticles; B, drying the Al(OH)3 nanoparticles obtained in the step A in an air dry oven, wherein a mixture of the Al(OH)3 nanoparticles and the solution of a silane coupling agent is pre-dried at a temperature of 150 DEG C for 50 min so as to realize said drying; C, adding the Al(OH)3 nanoparticles obtained in the step B into ethylene propylene diene monomer (EPDM) rubber which has undergone plastication/banburying, further adding rubber oil, a promoter and a vulcanizing agent, carrying out repeated mixing on a roller until a uniform mixture is obtained, and carrying out thin-passing and slice-making so as to obtain an EPDM rubber compound; and D, putting the mixed EPDM flame-retardant rubber into a mould, carrying out primary sulfuration after cold pressing and mould filling, and then putting the rubber in the air dry oven on glass cloth for secondary sulfuration so as to obtain a finished product of the halogen-free flame-retardant rubber composite. According to the invention, flame retardation of the EPDM rubber is substantially improved.

The invention provides a flame-retardant butadiene-styrene rubber formula which comprises the following raw materials in weight part: 70-80 parts of butadiene-styrene rubber, 15-20 parts of antimony trioxide, 25-30 parts of chlorinated paraffin, 10-15 parts of white carbon black, 3-5 parts of a vulcanizing agent, 15-18 parts of calcium carbonate, 5-8 parts of an anti-aging agent and 15-30 parts of dibutyl phthalate, wherein the anti-aging agent in the flame retarded butadiene-styrene rubber formula is 1,4-benzenediamine N,N'-mixed phenyl and tolyl derivs. The rubber produced through the formula provided by the invention has a good flame-retardant effect, and cannot produce poisonous gas in case of fire, and avoids secondary damage, so that life safety of people is ensured.

The invention discloses a mix proportion optimization method of a low-freezing point asphalt mixture, and belongs to the technical field of the road engineering material. The problem that the existinglow-freezing point asphalt mixture is insufficient in durability and conflict in deicing effect and the durability is solved. The optimization method comprises the following steps: one, preparing rawmaterials; two, determining the optimal asphalt content: a, preparing a Marshall sample; b, measuring a physical index of the low-freezing point asphalt mixture; c, measuring a mechanics index of thelow-freezing point asphalt mixture; d, measuring a complex shear modulus coefficient deltaG* of an asphalt cement; and e, drawing a relational graph of the asphalt content and various indexes to determine the optimal asphalt content; and three, synthesizing the low-freezing point asphalt mixture by using the determined optimal asphalt content, and performing verification assessment through a pavement performance test. Besides the conventional asphalt mixture physical mechanic indexes, the invention further provides a new index so as to control the durability of the mixture, and the problem that the existing low-freezing point asphalt mixture is insufficient in durability and conflict in deicing effect and the durability is solved.

The invention discloses a soil remediation device capable of removing omethoate components in farmland soil. The device comprises an original soil hopper, a blast sorting machine, a vibrating screening machine, a magnetic screening machine, a grinding machine, a three-stage microbe spraying and degrading reactor, an adjusting type spray tower, an electric heating blast dryer and a remedied soil storage silo. The device has the advantages that by creatively utilizing microbial degradation reaction of bacillus cereus, with participation of transphosphorylase, C-P bonds in the main components, O,O-dimethyl-S-[2-(methylamino)-2-oxo-ethyl] thiophosphate molecules, in omethoate, are broken and the main components are gradually degraded into harmless simple compounds, such as CO2, N2 and H2O, in a temperature range of 35-38 DEG C; the soil purified through microbial degradation can be repeatedly applied to agricultural production; meanwhile, no toxic chemical substances are used or generated in a method, thus basically putting an end to secondary harm to the environment in the soil remediation process.

The invention discloses a chromium-polluted soil total-chromium ex-situ treatment method. The chromium-polluted soil total-chromium ex-situ treatment method comprises that Cr(VI), Cr(III) and Cr(III) complex are subjected to staged leaching by two extracting agents, and concretely comprises carrying out leaching on high-water solubility Cr(VI) and hydrous Cr(III) by a first-grade leaching unit adopting a sodium hydroxide-EDTA-2Na mixed solution as the extracting agent, carrying out leaching on Cr(III) and its complex by a second-grade leaching unit adopting a citric acid-sulfuric acid mixed solution as the extracting agent, adding a proper amount of a conditioning agent into the leached soil, carrying out full stirring, carrying out backfilling, treating the leached supernatants obtained by the leaching units, and feeding the leached supernatants back to the corresponding leaching units. The chromium-polluted soil total-chromium ex-situ treatment method can remove Cr(VI) pollutants in a polluted place, guarantee total chromium content level reaching the standard and realize thorough treatment on Cr pollution in the place and has no secondary pollution hidden trouble.

The invention discloses a collision-preventing slide bar for stairway escape, which comprises a stairway and a top plate at the top of the stairway, a row of connecting supports are arranged on the top plate, the connecting supports are connected with slide bars which can go up and down along with the stairway, the two ends of each two slide bars are connected with each other through a connector, the slide bars and the connectors comprise corresponding slide chambers and slide ways, the slide ways are arranged on the slide bars and the connectors and are communicated with the slide chambers, a collision-preventing sliding device which can slide in the slide chamber is arranged in each slide chamber, the end of each collision-preventing sliding device is connected with a pull rod which passes through the corresponding slide way, and each pull rod is connected with a hanging rope with a seat board. The collision-preventing slide bar for stairway escape can prevent the occurrence of the problem of forward and backward collision in the process of sliding, thus further ensuring personal safety and further increasing the escape rate in hazards such as fire.

The invention provides a special workboat for water bottom sludge sucking, and relates to the technical field of water environment treatment. The technical problem that in water environment treatment in the prior art, water bottom sludge needs to be thoroughly removed, and then water body pollution can be removed is solved. The special workboat for water bottom sludge sucking comprises a workboat body and a sludge sucking device. The sludge sucking device comprises a depth position adjusting device and a sucking device body. The sucking device body comprises a sludge suction port, and sludge is sucked through the sludge suction port. The sucking device body is connected with the workboat body through the depth position adjusting device. The depth position adjusting device can drive the sucking device body to ascend; and the sucking device body is allowed to extend the sludge suction port to the position of a semi-sedimentation deposit layer above a water bottom sludge surface layer under the action of the weight so as to suck sludge located on the semi-sedimentation deposit layer. The special workboat is used for removing water body pollution.

The invention discloses a cold chain coolant that is characterized by being prepared from, by mass, 5%-10% of metal chloride, 1%-4% of ammonium chloride, 1%-3% of alcohol, 0.1%-0.3% of active silicon,2%-5% of borax, 0.3%-1% of docusate sodium, 5%-10% of amino-terminated polyethylene glycol amidated pectic acid, 2%-4% of aleuritic acid group organic salt and the balance water, wherein the aleuritic acid group organic salt is prepared by carrying out ion exchange reaction on aleuritic acid and choline. The invention further discloses a preparation method of the cold chain coolant. The cold chain coolant disclosed by the invention has the advantages of large latent heat, small supercooling degree, good heat transfer, good cold chain effect, small toxicity and pollution, high cold chain efficiency and long cold storage time.

A cold chain coolant comprises, by weight, 2.5-7.5% of sodium chloride, 2.5-5% of sodium carboxymethyl cellulose, 2.5-7.5% of high fructose corn syrup, 0.1-3% of sodium alginate, 0.1-2% of sodium stearate, 2.5-5% of dietary fiber, and the balance of water. All the materials used herein are food-grade materials, the finished cold chain coolant is also of food grade, has the advantages of zero toxicity, harm and pollution, and is widely applicable to cold chain logistics, low temperature preservation, intelligent cold stations, clinical treatment and other fields, and secondary damage to foods or drugs during storage and transportation due to the cold chain coolant is avoided.

The invention relates to a cold storage agent which comprises the following materials by weight part: 5-15% of sodium chloride, 5-10% of sodium carboxymethylcellulose, 2.5-5% of dietary fiber and the balance of water. The adopted preparing raw materials are all food-grade raw materials, so that the end product of the cold storage agent provided by the invention is also at food-grade and has the advantages of being non-toxic, harmless and pollution-free; the cold storage agent can be widely applied to the fields of cold-chain logistics, low temperature preservation, intelligent cold-making station, clinical medical, and the like; the secondary harm of the cold storage agent to the food or medicine in the storage and transporting processes can be avoided.

A cool storage agent with low phase-transition temperature comprises components in percentage by mass as follows: 15%-25% of sodium chloride, 10%-15% of sodium carboxymethylcellulose, 0-5% of dietary cellulose, 0-15% of high fructose corn syrup and the balance of water. Due to the fact that the adopted preparation raw materials are food-grade, the cool storage agent with the low phase-transition temperature has the advantages of being non-toxic, harmless and pollution-free, can be widely applied to the fields of cold-chain logistics, low-temperature preservation, intelligent cooling stations, clinical care and the like, and the cool storage agent is prevented from causing secondary hazards on food or drugs in storage and transportation processes.

The invention relates to butadiene styrene rubber. The butadiene styrene rubber comprises the following raw materials in parts by weight: 70 to 80 parts of butadiene styrene rubber, 10 to 20 parts of natural rubber, 3 to 6 parts of polyoxypropylene glycerol ether, 25 to 30 parts of chlorinated paraffin, 10 to 15 parts of white carbon black, 3 to 5 parts of a promoting agent, 5 to 15 parts of an ethylene-propylene polymer, 3 to 5 parts of a vulcanizing agent, 15 to 18 parts of calcium carbonate, 5 to 8 parts of an anti-aging agent and 3 to 5 parts of a plasticizer. The butadiene styrene rubber is good in flame-retardant effect, no toxic gas is produced when in fire, the secondary harm is avoided, and the life security of people is not influenced.

The invention discloses a low-friction low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof, and relates to the technical field of cable materials. Raw materials of the cable material comprise: matrix resin, a flame-retardant filler, a hydrophobic surfactant, a compatilizer, a slipping agent and an antioxidant; wherein the matrix resin comprises an ethylene-vinyl acetate copolymer and a propylene-ethylene copolymer; the flame-retardant filler comprises aluminum hydroxide and magnesium hydroxide; and the slipping agent comprises oleamide and siliconemaster batch. The cable material has excellent low-temperature flexibility. The preparation method comprises the following steps of: heating the ethylene-vinyl acetate copolymer to a molten state, and spraying a hydrophobic surfactant aqueous solution while stirring to obtain a first mixture; adding the flame-retardant filler, the slipping agent, the compatilizer and the antioxidant into the first mixture, and mixing the substances uniformly to obtain a second mixture, and performing high-pressure banburying; subjecting the first mixture, the second mixture and the propylene-ethylene copolymer to mixing granulation so as to obtain a final product. The prepared product is uniform and stable in quality.

The invention discloses a pretreatment method for quickly reducing the concentration of hexavalent chromium in wastewater, comprising the following steps: a. ₂ :AlCl ₃ ·6H ₂ O molar ratio is that the ratio of 3: 1 is mixed with medicament; B joins medicament in the waste water that contains hexavalent chromium, and the quality of added medicament is 1~5 times of the required stoichiometric amount of generating chromic acid type ettringite, then Add NaOH, adjust the pH value of the wastewater to 11.7-13.1, control the temperature of the wastewater to 5-40°C, and react under stirring conditions for 0.5-24 hours to obtain a suspension; c. Suction filter the suspension obtained in step b, A filtrate and a chromium-containing sediment are obtained. The present invention will Ca(OH) ₂ and AlCl ₃ ·6H ₂ The agent formulated with O can form chromate-type ettringite with hexavalent chromium in wastewater in a short period of time, stabilize hexavalent chromium ions in its molecular structure and precipitate them out, and quickly reduce the concentration of hexavalent chromium in wastewater Concentration, realize the pretreatment process of wastewater containing hexavalent chromium, and reduce the pressure for the subsequent wastewater treatment to meet the standard.

A food-grade cold storage agent is prepared from components in percentage by mass as follows: 5%-15% of sodium chloride, 5%-10% of sodium carboxymethylcellulose, 2.5%-7.5% of high-fructose syrup and the balance of water. Adopted raw materials are all food-grade raw materials, so that the food-grade cold storage agent has the advantages of no toxicity, no harm and no pollution, can be widely applied to the field of cold-chain logistics, low-temperature fresh keeping, intelligent cold stations, clinical care and the like, and secondary harm of the cold storage agent to food or medicines in the storage and transportation processes is avoided.