48results about How to "Eliminate production safety hazards" patented technology

The invention provides a roadway surrounding rock separation layer displacement monitor, which comprises a shell, a preventer plate, two sets of separation layer displacement transmission mechanisms, a separation layer displacement sensing unit and an information acquisition processing unit, wherein the separation layer displacement transmission mechanism comprises a displacement bracing wire, a transmission shaft, a driving wheel, a driving band, a take-up reel, a roll-up spring and a lock device; the separation layer displacement sensing unit comprises a support circuit board, a T platform, a grating and a photoelectric coupler; the preventer plate is provided with a leakage hole; and one end of the displacement bracing wire is fixed in the stratum and the other end thereof is clamped inside a T slot of the take-up reel. The monitor of the invention has the beneficial effects of having simple manufacturing technology and structure, convenient operation, improving displacement inspection accuracy, being applied to construction processes of mine exploitation, building, water conservancy, roads and the like, effectively and automatically monitoring surrounding rock mass, roadway roof and floor, dam bodies, side slopes and the like in real time, and timely eliminating potential safety hazard of production; and the monitor of the invention can provide basis for the roadway and the support rock mass design.

The invention relates to a preparing method of a cassava polysaccharide-iron complex. The method includes subjecting cassava starch to oxidative degradation by utilizing hydrogen peroxide to obtain anapplicable oligosaccharide solution; then adding dropwise an iron trichloride solution and a sodium hydroxide solution into the oligosaccharide solution to perform a complexing reaction to obtain a cassava polysaccharide-iron complex synthesis solution; performing filtration to remove water-insoluble impurities to obtain a cassava polysaccharide-iron complex solution; desalting and concentratingthe solution by adopting an ultrafiltration membrane process; and subjecting a product to spray-drying or vacuum evaporation drying, and crushing to obtain a cassava polysaccharide-iron complex product. The hydrogen peroxide is adopted to perform oxidative degradation on the cassava starch so as to replace previous acid-method or enzyme-method degradation processes, and therefore generation of a side product that is glucose in the method is significantly reduced than that in acid methods, a higher yield of applicable oligosaccharide is obtained, and the degradation time is greatly shortened than that of enzyme methods, thus reducing the production cost. Sodium chloride removal utilizing an ethanol or methanol solvent is replaced, thus avoiding use of flammable and combustible substances such as ethanol or methanol and eliminating hidden safety risks. The prepared cassava polysaccharide-iron complex can be used as an iron supplementing agent for livestock and poultry.

The invention discloses a detecting system for rapid sealing of a concentration sensor and a method thereof. The detecting system comprises a prism head shell of the concentration sensor to be detected, a measurement bracket, a camera, an atmospheric pressure cavity, an automatic air feeding pressurizing device, an air cylinder and a main controller; the camera, the air cylinder and the automaticair feeding pressurizing device are all electrically connected with the main controller; the method of the system comprises the step that the main controller performs data analysis and comparison on atest image which is shot and uploaded by the camera and an initial image, and judges whether the sealing of the concentration sensor is qualified or not according to the data analysis and comparisonresult; all test data are recorded automatically; the automation degree is high; the manual cost is reduced; meanwhile, the test time is shortened; the production efficiency is improved; and the production potential safety hazard is reduced.

The invention relates to a method for removing sodium chloride from cassava starch polysaccharide-iron complex liquid. The method comprises the following steps: A, adding cassava starch and water intoa reaction kettle, heating and regulating pH value, adding hydrogen peroxide solution to degrade the cassava starch, so as to obtain oligosaccharide solution with the weight-average molecular weightof 3-27KDa, then adding ferric trichloride solution and alkali, and carrying out complex reaction, so that cassava starch polysaccharide iron liquid is obtained; B, carrying out ultrafiltration on thecassava starch polysaccharide iron liquid obtained in the step A, and intercepting micromolecular cassava starch polysaccharide iron complex with the molecular weight of 2.5-200KDa to remove part ofsodium chloride; C, carrying out nanofiltration on permeate liquid obtained in the step B, and intercepting micromolecular cassava starch polysaccharide iron complex with the molecular weight of 200 Da by virtue of a nanofiltration membrane to remove sodium chloride; and D, mixing interception liquids obtained in the steps B and C, and carrying out spray drying, so that solid cassava starch polysaccharide iron complex is obtained, and nanofiltration permeate liquid can be directly discharged. The method provided by the invention has the advantages that technology is simple, energy conservationand environmental protection are realized, conditions are mild, and continuous production can be easily realized; concentration of sodium chloride in the cassava starch polysaccharide-iron complex liquid can be lowered; and recovery rate of the cassava starch polysaccharide iron complex is higher than 99%; and removal rate of sodium chloride is higher than 98%.

The invention discloses an assembly tooling for a hose throttle. The assembly tooling comprises an air tube, a distribution box, an air source, wires, a movable sliding block, a guide rail, a control switch, a guide rod, a positioning groove, a first air cylinder, a second air cylinder, a time solenoid valve and a tooling table frame capable of holding the parts. The solenoid valve is connected with and controls actions of the first air cylinder and the second air cylinder, the guide rod is fixed with the movable sliding block, the guide rod aligns to the positioning groove and performs guiding, the first air cylinder is connected with the movable sliding block, the movable sliding block is mounted on the guide rail and can move along the guide rail, and the second air cylinder is perpendicular to the first air cylinder. By means of the assembly tooling, the production efficiency is high, the product quality can be guaranteed, and potential production safety hazards can be eliminated.

The invention discloses a construction method for constitutive expression engineering bacteria of dextranase and a preparation method for enzyme. The construction method for the constitutive expression engineering bacteria comprises the following steps of: (1) inserting an obtained gene in a multi cloning site of an expression vector pGAPZalphaA to construct a recombinant plasmid pGAPZalphaA-dex;and (2) linearly transforming the recombinant plasmid to Pichia pastoris KM71H, and screening positive clone bacteria. The engineering bacteria are used in a preparation method for the dextranase. Bythe invention, the gene of the dextranase is effectively expressed in the Pichia pastoris successfully, a cheap carbon source is taken as a raw material, flammable and explosive methanol is not needed in the fermentation process, potential production safety hazards are eliminated, a fermentation process for the dextranase is enlarged, and the cost is reduced to the greatest extent.

The invention relates to a method for preparing cassava polysaccharide iron. The method is to oxidize and degrade cassava starch with hydrogen oxide to obtain an applicable oligosaccharide solution, and then add ferric chloride and sodium hydroxide solution dropwise to perform a complex reaction to obtain cassava polysaccharide. The iron synthesis solution is then filtered to remove water-insoluble impurities to obtain cassava polysaccharide iron solution, which is then desalinated and concentrated by ultrafiltration membrane technology, spray dried or vacuum evaporated, dried and crushed, and finally cassava polysaccharide iron products are obtained. The present invention uses hydrogen peroxide to oxidize and degrade cassava starch to replace the previous acid or enzymatic degradation process, which not only can significantly reduce the generation of by-product glucose than the acid method, obtain a higher yield of applicable oligosaccharides, and is more efficient than the enzymatic method. The degradation time is greatly shortened, thereby reducing production costs; it also replaces the previous ethanol or methanol solvent method to remove sodium chloride, avoids the use of flammable and explosive materials such as ethanol or methanol, and eliminates hidden dangers in production safety. The cassava polysaccharide iron prepared by the invention can be used as an iron supplement for poultry and livestock.

The invention discloses an automatic dyeing machine for injection molding lenses, which comprises a frame, a transmission mechanism, a grasping mechanism, a lifting mechanism, a cleaning mechanism, a water cutting mechanism, a dyeing mechanism, a lens fixture and a programmable controller; a first cleaning area is formed in the frame , the water cutting area, the dyeing area and the second cleaning area; the lens fixture is set in the first cleaning area and the water cutting area through the cooperation of the transmission mechanism and the lifting mechanism, and is also set in the water cutting area and the water cutting area through the cooperation of the grabbing mechanism and the lifting mechanism. The dyeing area and the second cleaning area; the water cutting mechanism keeps the lens fixture in a static state during water cutting. During the water cutting process, the lens is still, and the water is cut by the water flow rising first and then falling to make the water cutting more thorough; the dyeing mechanism can cooperate with The dyeing car is assembled with the main dyeing tank and the dyeing auxiliary tank, so as to move the rack to replace the dyeing solution. The invention can realize the automation of the lens dyeing process, improve the dyeing efficiency of the lens, and improve the quality of the dyed lens.

The invention discloses a motor thermoplasticizing apparatus with a characteristic of less waste. The motor thermoplasticizing apparatus comprises a rack (1), wherein a support plate (2) is arranged on the middle portion of the rack (1), a set of independent concave molds (4) are arranged on the support plate (2), injection molding ports (4) are arranged on the concave molds (4) and are connected to an injection molding pipeline (5), the upper portion of the rack (1) is provided with a hydraulic rod (6), the hydraulic rod (6) is connected to a second support plate (7), the second support plate (7) is provided with convex molds (8), a cooling pipeline (9) and a heating pipe (10) are arranged inside the injection molding pipeline (5), the hydraulic rod (6) is connected to a controller (12), and the controller (12) is connected to a temperature sensor (13). According to the present invention, the motor thermoplasticizing apparatus has characteristics of production efficiency increasing, production waste reducing, labor intensity reducing, production cost reducing, product quality improving, real-time inside-injection mold pipeline temperature adjusting, and production safety hidden danger eliminating.

The invention discloses a full automatic multi-map puncher system used for book page die punching. The system comprises a delivery platform, a punching platform, an automatic pushing device and an automatic page turning device, the punching platform and the automatic page turning device are arranged on the same side of the delivery platform, placing grooves which are used for placing books are reserved between the punching platform and the delivery platform and between the automatic page turning device and the delivery platform, and the automatic pushing device is arranged on the delivery platform. By means of the system, multi-map books can be embedded in the placing grooves to be delivered on the delivery platform through the automatic pushing device to the punching platform, page turning of the multi-map books can be achieved through the automatic page turning device in the delivery process, fully automatic production line die punching production of the multi-map books can be achieved, the labor intensity of operators is greatly reduced to save a large amount of labor force, production safety potential hazards are eliminated, the production speed is accelerated, and the die punching production efficiency of the multi-map books is greatly improved.

The invention relates to a plate-like part and a manufacturing method thereof. The plate-like part comprises a plate-like part body and reinforcing parts arranged inside the plate-like part body, and the outer surface of each reinforcing part is wrapped with a layer of medium. The manufacturing method includes the following steps that the outer surface of each reinforcing part is wrapped with the layer of medium; each reinforcing part is placed in a mold, and a first auxiliary structure and a second auxiliary structure are arranged at the two ends of each reinforcing part correspondingly and protrude out of the two end faces of the reinforcing part by a preset length in the axial direction of the reinforcing part; injection molding operation is carried out through the mold, so that the reinforcing parts are arranged inside the formed plate-like part body; and after injection molding, the auxiliary structures are removed. The plate-like part has the advantages of being good in pressure bearing effect, small in thickness and safe in production due to the adoption of the mode that the reinforcing parts are wrapped with the media in advance, the production cost is lowered, and the problem that a plate-like part obtained through existing production techniques is prone to shrinkage cracks is solved.

The invention relates to the technical field of escalators, in particular to a structure for connecting the upper and lower parts of an escalator with a truss through bolts. The structure is providedwith an upper escalator reinforcing plate, a lower escalator reinforcing plate, driving plates of the truss and columns; the rear ends of the reinforcing plates are connected to the truss through angled members, and the reinforcing plate, the truss and the angled members are connected by hexagon bolts and hexagon nuts; the columns are connected to the front ends of the reinforcing plates through support members. The structure has the advantages of reducing welding procedures, eliminating potential safety hazards during production, improving the working environment, reducing the deformation caused by welding and improving the product precision. Exhaust welding slag is reduced, the overall appearance of a product is more attractive, paint repair is not needed after installation is completed,and the chromatic aberration is reduced; welding slag residues are prevented from remaining on the truss and a baseplate, and thus the overall appearance of the product is more attractive.

The invention provides a process for synthesizing 4-Nitrobenzyl chloroformate, which comprises reacting trichloromethyl chloroformate or bis(trichloromethyl)carbonate with p-nitrobenzyl alcohol at -40-20 deg C under the action of acid-binding agent, finally carrying out post-treatment to obtain the outcome yield.

The invention discloses a jacquard automatic edge separation screen cloth, and belongs to the technical field of textile. The jacquard automatic edge separation screen cloth comprises a screen cloth body, the screen cloth body is integrally woven by jacquard warp knitting equipment and at least comprises at least two edge separation cloth, each edge separation cloth comprises a ground comb layer, a jacquard layer and edge sealing common layers, and at least one pair of edge sealing common layers are adjacently and longitudinally distributed on one side of the edge separation cloth. Under the condition that complete separation is not needed, the adjacent edge sealing common layers are connected in a staggered mode through a single yarn; under the condition that the length of the screen cloth needs to be shortened, at least one pair of edge sealing common layers which are formed by connecting single yarns in a staggered mode can be transversely arranged on the edge dividing cloth and are transversely distributed on the edge dividing cloth; and when the screen cloth needs to have a certain thickness during design, a wool high layer can be arranged on the edge dividing cloth.

A method for preparing 2-[(cyanomethyl)thio]acetyl chloride, taking 2-[(cyanomethyl)thio]acetic acid potassium salt and bis(trichloro methyl)carbonate as stock, putting them into organic dissolvent for reaction under the effect of catalyst for 8-16 hours, the temperature is -5~60 DEG C, separating and purifying to get the product.The consumption of chlorizating agent in said chemosynthesis method reduces greatly for the use of bis(trichloro methyl)carbonate, which can reduces the production cost and eliminates the potential safety hazard from the preparing source, and considerably decreases the yield of three wastes and increases the yield of products and promotes the quality as well; the dissolvent can be recovered which decreases pollution and production cost.

Belonging to the technical field of tobacco additives, the invention discloses a purification method of an antioxidant rosmarinic acid for tobacco. The purification method is carried out according to the steps of: (1) performing primary purification: first passing a rosmarinic acid-containing extraction solution A through a 30nm inorganic membrane, then passing it through an organic spiral-wound membrane with molecular weight cut-off of 3000, thus obtaining the filtrate B; (2) making sample loading preparation: subjecting the filtrate B to reverse osmosis membrane concentration to obtain a concentrated sample C; (3) conducting fine purification: carrying out chromatographic separation on the concentrated sample C by a gel column and collecting rosmarinic acid fraction; and (4) further concentrating and purifying the collected rosmarinic acid fraction by a pressure reduction distillation method and a recrystallization method in the prior art so as to make the rosmarinic acid content reach 80%-95%. The method provided in the invention is simple, safe, pollution-free, and is easy to implement.