39results about How to "Reduce the risk of occupational diseases" patented technology

The invention discloses a deslagging agent used for smelting cast iron and a preparation method thereof. The deslagging agent comprises, by weight, 70%-75.2% of silicon dioxide, 12.1%-15.9% of aluminum oxide, 0.5%-1.9% of ferric oxide, 1.2%-3.22% of sodium oxide, 1.9%-3.84% of potassium oxide, 0.9%-1.48% of calcium oxide, 0.47%-1.46% of magnesium oxide, and the balance iron and inevitable impurities. The deslagging agent used for smelting the cast iron mainly comprises SiO2 and Al2O3 and can instantly expand when sharply heated to the temperature of 1100DEG C or over so as to form a viscous active material of a porous structure, so that molten iron, slag in the molten iron, and impurities can adhere together to be gathered; the deslagging agent has a low heat conductivity coefficient so that heat conduction and thermal radiation on the surface of the molten iron can be effectively reduced, and a heat preservation effect is achieved; and the problems, such as corrosive pits, white spotsand wrinkles, which occur frequently during cast iron machining are solved while the defects are overcome.

The invention relates to a method for producing handicraft articles, in particular to a method for manufacturing a tin-embedded die and a tin-embedded technological pattern. The tin-embedded die is made of silica gel. The step for manufacturing the tin-embedded technological pattern comprises the following steps: manufacturing a stone die, engraving the stone die according to layout work, and arranging a liquid casting flow passage; melting passivated tin into a tin liquid; injecting the tin liquid into the stone die, and taking out a pattern after solidification; removing redundant parts of the pattern, and using sand paper to grind the surface of the pattern; manufacturing a master die; manufacturing a silica gel die blank; placing the master die on the surface of the silica gel die blank, and placing the silica gel die blank on a press molding machine for heating and compression molding; taking out the master die from a silica gel die after cooling, and obtaining the silica gel die; melting passivated tin into a tin liquid; and injecting the tin liquid into the silica gel die, taking out the pattern after the tin liquid is solidified, and obtaining the tin-embedded technological pattern after edging. The method has the advantages that due to adoption of the silica gel die, the finely chiseled master die can be preserved and used permanently after compression molding; die turnover for a plurality of times is not required; and the method can meet the requirements of scale and industrialization of the handicraft articles.

The invention discloses an intelligent environment management system based on the Internet of Things. The system comprises a dust concentration detection module, an oxide detection module, an environment parameter detection module, a noise comparative analysis module, an environment parameter storage database, a particle content analysis module, a data pre-screening processing module, a managementcloud server, an intelligent display terminal and a mobile dust suppression mechanism. According to the invention, whether the dust content and the temperature in the factory reach the explosion danger degree under the combined action can be comprehensively analyzed, and a mode of combining software and hardware is adopted; the mobile dust suppression mechanism is controlled to move to the position of the detection sub-region of which the predicted explosion danger coefficient is greater than a set predicted safety explosion danger coefficient threshold value, so the dust suppression operation is realized, and the explosion risk is reduced; whether the working environment meets the personnel office environment requirements or not can be judged through the statistical working environment matching suppression system, the environmental conditions in the personnel working environment can be visually displayed and analyzed, and the detection accuracy is high.

The invention discloses a runner preheating cover and a runner preheating method. The runner preheating cover comprises a shell and a lining structure. When the shell is preheated, the face, close to a runner, of the shell is the first face, and the first face is provided with a cavity. The lining structure is located in the cavity of the shell. The lining structure internally comprises an electric heater used for generating heat for preheating the runner. The electric heater in the lining structure is used for heating the runner, the runner is preheated, the runner can be subjected to heat preservation through the lining structure and the shell, dissipation of excessive heat in the runner heating process is reduced, heat losses in the runner preheating process are reduced, the runner preheating speed can be increased, the runner preheating time is shortened, and resources and cost are saved. In addition, the electric heater is used for heating the runner, usage of open fire is avoided in the heating process, the service life of a heat preservation material is prolonged, the heat preservation material is prevented from being frequently replaced, garbage generation is reduced, and the runner preheating cover saves more energy and is more environment-friendly.

The invention relates to a Chinese herb manually planing device and an application method thereof and belongs to the technical field of Chinese herbal piece slicing equipment. The Chinese herb manually planing device comprises a planing pile, a sliding rack and tension springs, wherein the sliding rack is provided with a pair of guide bars, the end portions of the guide bars are connected througha pressure bar, and each guide bar is provided with a push rod; the left and the right of the upper portion of the planing pile are respectively provided with a bar-shaped hole, and the push rods of the sliding rack are arranged inside the corresponding bar-shaped holes; the tension springs are used for tensioning the push rods so that the pressure bar of the sliding rack can press Chinese herbs arranged on the front surface of the planing pile. According to the Chinese herb manually planing device, an operator manually drives the sliding rack to move forwards and then places the Chinese herbsbetween the sliding rack and the planing pile, and then the sliding rack controlled by the tension spring can press the Chinese herbs onto the planing pile, so that the operator can rapidly and flexibly place Chinese herbs to be clamped, and further the cumbersome operation process in the prior art that Chinese herbs are placed one by one inside a bottomless material box for planing can be simplified.

The invention discloses a method and equipment for a complex copper-lead-zinc sulfide ore grinding process. The method comprises the following steps of feeding a coarse crushed material of a jaw crusher into a linear vibrating screen, feeding an oversize material into a cone crusher for crushing, merging the crushed oversize material into the coarse crushed material to form a closed-circuit system, and feeding an undersize material into a stock bin; and feeding the material in the stock bin into a micro-powder sieve, feeding the oversize material into a high-pressure roller mill for ultrafinecrushing and then returns to the micro-powder sieve for feeding to form a closed-circuit system, and the undersize material is a final crushed product. The jaw crusher, the cone crusher, the high-pressure roller mill, the linear vibrating screen and the micro-powder screen form a "three-section two-closed-circuit" process, so that the ore crushing process is enhanced, the granularity of ore grinding materials is reduced, and a final crushed product P95 can be controlled to be 1-2mm; in the first-stage ore grinding, a tower mill and a hydrocyclone are adopted to form a closed circuit; and ore is treated through the three-section two-closed-circuit "ultrafine crushing" and tower grinding combined ore grinding process, and the fineness of the finally floated material can be controlled to be -0.074 mm and is larger than or equal to 85%.

The invention relates to the technical field of roadway support and discloses a support dismounting vehicle. The vehicle comprises a second vehicle body, a second support, second sliding ways, second nut sliding blocks, second lead screws, second driving devices and a mounting arm, wherein the second support is connected with the second vehicle body in a lifting manner; the second sliding ways are connected with the second support and extend in the length direction of the second vehicle body, the number of the second sliding ways is two, and the two second sliding ways are arranged in the width direction of the second vehicle body at intervals; the second nut sliding blocks are arranged in the second sliding ways, and at least part of the second nut sliding blocks are located on the outer side of the second sliding ways; the second lead screws are arranged in the second sliding ways and are in threaded fit with the second nut sliding blocks; the second driving devices are arranged at one ends of the second sliding ways and are connected with the second lead screws; and the mounting arm is used for dismounting a supporting shed frame from the roadway. The supporting shed frame can be automatically disassembled, so automation and unmanned operation during working face tunneling are realized, and construction efficiency can be improved.

The invention discloses a connector component surface polishing robot for an automobile windscreen wiper system. The connector component surface polishing robot mainly comprises a component surface polishing robot body, a six-axis machine control system, a grinding module, a fine polishing module and a rough polishing module. The grinding module, the rough polishing module and the fine polishing module are arranged on a tabletop of the component surface polishing robot body. The rough polishing module is arranged on the right side of the grinding module. The fine polishing module is arranged on the right side of the rough polishing module. The grinding module is arranged on the left side of the rough polishing module. The fine polishing module and the rough polishing module are provided with six-axis machine systems correspondingly. The six-axis machine control system is arranged in a lower-layer control cabinet of the robot. Annular abrasive belts of the connector component surface polishing robot for the automobile windscreen wiper system are arranged on rolling wheels correspondingly, through driving of drive wheels, a tension device and a motor on a front driven wheel are utilized, the environment of the work field is improved, and unmanned operation and intelligence are achieved.

The invention discloses a tire tube rubber which is prepared from the following raw materials in percentage by weight: 10-30 percent of natural rubber, 30-70 percent of reclaimed rubber, 3-5 percent of a rubber accelerator, 5-8 percent of metallic oxide, 3-6 percent of stearic acid, 1-3 percent of 4010NA1, 1-2 percent of PM1, 0.5-2 percent of tall oil, 1-3 percent of rosin, 1-3 percent of a rubber smell-covering agent and the balance of reinforcing filler. According to the tire tube rubber, damage of carbon black to the respiratory system of an operator is effectively avoided, the risk of suffering from occupational diseases by production personnel is reduced, the odor of rubber is reduced, the ageing resistance, compression resistance and impact resistance of the rubber are greatly improved, the environmental pollution is avoided, the service life of the tire rube is prolonged, and the service safety of the tire tube is improved.

The invention relates to a stamping edging device without the need of manual polishing, which comprises a lower mould, an upper mould, a pressurizing device and a cutter, wherein the upper mould is arranged above the lower mould for a certain distance in an up and down moving mode, and the bottom is provided with a cutter mounting rack; the pressurizing device is arranged on the upper part of the upper mould, and is provided with a controller; and the cutter is vertically arranged at one side of the mounting rack on the upper mould, and a sawtooth-shaped grinding mouth is formed at the lower part of the outer side edge of the cutter. In the stamping edging device without the need of manual polishing provided by the invention, material traps on the surface of a demoulded product are removed by the up and down reciprocating movement of the cutter with the sawtooth-shaped grinding mouth, and deckle edges are polished to be smooth. Because manual polishing is not needed, the number and the labor intensity of operators can be greatly reduced, the production efficiency is high, environment pollution can be reduced, and the risk of suffering from occupational diseases for the operators is reduced.

The invention discloses a large-thermal-field automatic loading device. The large-thermal-field automatic loading device at least comprises a feeding system, a discharging system and an electric control system, wherein the feeding system comprises a feeding table for containing a material basket and a material turning assembly used for turning the feeding table, and the discharging system comprises a collecting hopper and a discharging opening. The invention further discloses a large-thermal-field automatic loading method. The large-thermal-field automatic loading method comprises the following steps that the material basket is conveyed to the feeding table; the feeding table is lifted by a feeding lifting system; a silicon material is poured into the collecting hopper by the material turning assembly; and the silicon material entering the collecting hopper is screened by a vibration screening system and then is fed into a hopper or a crucible through the discharging opening. Accordingto the large-thermal-field automatic loading device and method, the problems of low efficiency and long time consumption of manual feeding in the existing single crystal preparation industry are solved, the silicon material is poured into the collecting hopper by the automatic feeding system, and then undergoes screening to be put into the hopper or the crucible through the discharging opening, the whole feeding process is realized by a machine, an operator is only responsible for operation after the silicon material is conveyed to the feeding table, so that the feeding efficiency is improved, and the enterprise cost and the risk of occupational diseases of workers are reduced.

The invention relates to the field of metal smelting and discloses a novel submerged arc furnace and flue gas sealing device thereof. The flue gas sealing device comprises a rotary liner platform anda smoke hood. The rotary liner platform is arranged in a circular notch of the smoke hood. An upper half ring is arranged on the periphery of the rotary liner platform, and the upper half ring is connected with the rotary liner platform through ring-shaped groove plates of the inner ring of the upper half ring. A lower half ring is arranged on the top of the smoke hood in a circular manner. The upper half ring does not contact with the lower half ring, the ring-shaped groove plates of the outer ring of the upper half ring are arranged in a groove of the lower half ring, a smoke sealing mediumis arranged in the groove, a smoke sealing medium is arranged in the groove, and therefore the upper half ring and the lower half ring can form a mazy sealed structure. By means of the novel submergedarc furnace and the flue gas sealing device thereof, due to the flue gas sealing device, flue gas leakage of the submerged arc furnace can be effectively reduce, the environment is protected, meanwhile, the failure rate of the submerged arc furnace can be reduced by utilizing the flue gas sealing device, the occupational disease danger of workers is lowered, and the running rate of the submergedarc furnace is improved.

The invention relates to the technical field of roadway support and discloses a support mounting vehicle. The vehicle comprises a first vehicle body, first supports, first sliding ways, first nut sliding blocks, first lead screws, first driving devices and a mounting arm, wherein the two first supports are arranged on the two sides of the first vehicle body in the width direction correspondingly; the first sliding ways are connected with the first supports and extend along the length direction of the first vehicle body; the first nut sliding blocks are arranged in the first sliding ways in a sliding mode; the first lead screws are rotatably arranged in the first sliding ways in the length direction of the first sliding ways, and the first lead screws are in threaded fit with the first nut sliding blocks; the first driving devices are arranged at one end of the first sliding ways and connected with the first lead screws, the first driving devices are used for driving the first lead screws to rotate and driving the first nut sliding blocks to slide along the first sliding ways; and the mounting arm is used for supporting the supporting shed frame in a roadway. According to the vehicle, automatic installation of the support shed frame can be realized, automation and unmanned operation during working face tunneling can be realized, and construction efficiency is improved.