53results about How to "Avoid production safety accidents" patented technology

The invention discloses a molten steel vacuum refining system based on a mechanical pump group. The system comprises a vacuum tank, a deduster, a roots pump group and a pre-screw pump, wherein the roots pump group comprises a main roots pump, a first middle roots pump and a second middle roots pump; the deduster is also directly connected with the pre-screw pump through a pipeline; the bottom of the vacuum tank is connected with an argon system; the system also comprises a controller; the first middle roots pump, the second middle roots pump and the pre-screw pump are all electrically connected with the controller; the main roots pump is electrically connected with the controller through a frequency converter; a liquid level sensor is arranged at the upper part of the inner wall of a refining furnace of the vacuum tank; the liquid level sensor is electrically connected with the controller; a vacuum degree measuring device is mounted on a pipeline between the deduster and the main roots pump; and the vacuum degree measuring device is connected with the controller. The system disclosed by the invention can perform automatic control to realize stable liquid surface of the molten liquid in the refining furnace of the vacuum tank to prevent steel overflow, thereby avoiding production safety accident.

The invention relates to a nitrogen/chlorine (argon/chlorine) mixing and proportioning system and an operation method thereof, aiming to overcome the defect that the manual nitrogen/chlorine (argon/chlorine) mixing and proportioning process in the prior art is completed by manual operation rather than automatic operation and is low in proportioning precision and high in operation risk. The nitrogen/chlorine (argon/chlorine) mixing and proportioning system comprises nitrogen (argon) gas running equipment, chlorine gas running equipment, a nitrogen and chlorine (argon and chlorine) mixer, a mixed gas storage tank and a PLC (programmable logic controller) control cabinet, wherein tail ends of the nitrogen (argon) gas running equipment and the chlorine gas running equipment are connected with the nitrogen and chlorine (argon and chlorine) mixer together, the nitrogen and chlorine (argon and chlorine) mixer is further connected with the mixed gas storage tank for a feeding point, a pressure sensor is arranged on the mixed gas storage tank, the PLC control cabinet is connected with all the equipment, and intelligent management and operation is realized by an internal control and management system. The nitrogen/chlorine (argon/chlorine) mixing and proportioning system and the operation method thereof have the advantages that automatic proportioning operation can be realized, operators can keep away from dangerous sources, the proportioning precision is increased, the service life of the equipment is prolonged, the service pressure of the system is stabilized, and leakage caused by long-term overhigh pressure load for the end equipment is avoided.

The invention discloses an oilfield injection-production parameter optimization and adjustment method based on fault stability evaluation. The method includes the following steps that 1, a fault pressure-bearing limit is predicted; 2, the current balance formation pressure is calculated; 3, the original formation pressure is calculated; 4, the current balance formation pressure is compared with the fault pressure-bearing limit, if the current balance formation pressure is smaller than the fault pressure-bearing limit, a fault is stable, production pressure can be increased properly, and oil well productivity is increased; if the current balance formation pressure is larger than the fault pressure-bearing limit, the fault is in an unstable state, and injection-production parameter adjustment is required to be conducted in fault blocks on the two sides of the fault respectively according to the injection-production parameter optimization and adjustment method in the fault blocks. Based on prediction about the critical pressure required for fault stability maintenance, an oilfield water injection parameter optimization and adjustment method is improved, and the situation that fault activation caused by abnormally high formation pressure gives rise to production safety accidents is avoided.

An anti-static membrane based on graphene is prepared from, by mass, 100 parts of base material, 1.5-6 parts of 1,6-diisocyanatohexane, 1-2 parts of N-dimethylethanolamine, 1-10 parts of nano graphene particle, 1-3 parts of dispersing agent and 0.5-3 parts of waterproof agent. The base material is one of polyurethane resin, thermoplastic polyurethane elastomer, polyether sulfone resin and polytetrafluoroethylene. Due to excellent anti-static performance of the anti-static membrane based on graphene, the membrane can be widely applied to textile fabrics, meets the wearing requirements of people for dryness and comfort, and has the strong efficient anti-static, heat-storage, thermal, antibacterial, anti-acarid and anti-radiation effects.

The invention discloses a regeneration technology for acid copper chloride etching waste liquid. The regeneration technology includes the steps of carrying out replacement and filtering, washing filter residues, preparing regeneration mixed liquid, and carrying out oxidation to form regeneration etching sub-liquid. According to the regeneration technology, toxic chlorine is not used, ingredients in the acid etching waste liquid can be sufficiently recycled, and a large amount of redundant chemical waste liquid is not generated. The invention further provides a recycling technology for the acid copper chloride etching waste liquid. The recycling technology includes the steps of replacement, filtering, filter residue washing and oxidation recycling. According to the recycling technology, toxic chlorine is not used, and a recycled solution with ferric trichloride as a main ingredient can serve as a wastewater treatment raw material to be recycled; and recycled copper can be directly reused.

The invention discloses an alkaline liquid absorption tower with a filling backwashing device. The alkaline liquid absorption tower comprises an absorption tower, an alkaline liquid storage tank, a circulating pump and a backwashing circulating system, wherein the absorption tower is internally provided with a filling layer; a tail gas inlet is formed in a side wall of a tower body located below the filling layer; the absorption tower is provided with a tail gas outlet at the top and an alkaline liquid outlet at the bottom; the alkaline liquid storage tank is arranged below the absorption tower and is connected with the alkaline liquid outlet; an outlet formed in the bottom of the alkaline liquid storage tank is connected with an inlet end of the circulating pump; the backwashing circulating system comprises an alkaline liquid inlet pipeline, a backwashing pipeline and a backwashing device. The device disclosed by the invention has the advantages of relatively small investment and simple structure; the problem that inorganic salt in filling is crystallized in the absorption tower can be solved relatively well, the absorption effect of the absorption tower is improved and the pollution, caused by tail gas, on the environment is avoided.

The invention relates to the technical field of cloth winding, in particular to a cloth winding device with an automatic winding structure for the textile industry. The device comprises a winding device body, wherein the winding device body comprises a shell, a control panel is fixedly mounted on the right side wall of the shell, a support is fixedly connected to the front side of the shell, a cloth roller is movably connected to the interior of the shell, a sliding groove is formed in the front side wall of the inner side of the shell, a fixing structure is installed in the winding device body and comprises an outer cylinder, the outer cylinder is fixedly connected to the side wall of the shell, a telescopic rod is movably installed in the outer cylinder, and the top end of the telescopic rod is movably connected with a rotating rod. According to the winding device, a cloth head can be stably fixed to a cloth winding drum, when the cloth winding drum rotates, the cloth head can be automatically wound around the cloth winding drum, the preparation work time is saved, winding is tighter, and the practicability of the device is improved.

The invention discloses a coil reshaping and pin shearing machine. A reshaping mechanism, a pin shearing mechanism and a waste material groove are included; the reshaping mechanism comprises a clamp assembly used for clamping pins of a coil, and a reshaping assembly arranged above the clamp assembly liftably; the reshaping assembly comprises a lower positioning plate and an upper positioning plateused for jointly clamping the coil; the upper positioning plate is provided with a first groove matched with the coil in shape; the lower positioning plate is provided with first passing holes for the pins of the coil to pass through; the pin shearing mechanism comprises a first positioning assembly and a scissor assembly; the first positioning assembly comprises a supporting plate and a pressingplate arranged above the supporting plate liftably; the supporting plate is provided with second passing holes for the pins of the coil to pass through; the scissor assembly is arranged below the second passing holes; and the waste material groove is arranged below the scissor assembly. The consistency of the product shape after coil reshaping and pin shearing is improved, the production efficiency is further improved, and production safety accidents are avoided.

The invention provides a control method and device suitable for the foamed slag furnace condition in iron bath smelting reduction. The method includes the following steps that firstly, according to the changes of the secondary combustion rate of coal gas, the calorific value of coal gas, the semi-coke content of smoke, the thermal load of a water cooled wall, the carbon content of molten iron, thecarbon powder content of slag, the slag density and the slag component index in iron bath smelting reduction production, whether foamed slag is generated or not is judged; secondly, if the foamed slag is generated, on the basis of existing production parameters, by increasing the ratio of the coal injection amount to the ore injection amount, the quaternary alkalinity of the slag is controlled to0.7-1.10, and the normal production of the furnace condition is recovered; and if the foamed slag is not generated, the production continues according to the existing production parameters. By meansof the method, accurate judgment of the foamed slag is achieved, rapid recovery of the normal production is achieved by controlling the production parameters, and the production efficiency is improved. By means of the method, the judgment basis and the recovery method of the the foamed slag furnace condition in iron bath smelting reduction are quantified, and the current blank of the production technology in the field is filled.

An electric power safety production hidden danger pre-control method based on a knowledge graph comprises the steps that a related electric power production safety hidden danger knowledge sample set is extracted through a natural language preprocessing technology, and information is preprocessed through a feature extraction algorithm; constructing a power production safety knowledge model based on the knowledge graph; the generated accident potential safety hazard and safety information record relation knowledge base is stored in an Elasticsearch database; and training the continuously input processed power production safety information candidate set through a deep learning technology, obtaining a knowledge reasoning network chain by using a trained model, putting the obtained training result set into a power production safety record knowledge base for matching one by one, and performing knowledge reasoning analysis to obtain an analysis result. According to the invention, the efficiency of potential safety hazard information management can be improved, pre-control and prevention of potential hazard events are realized, personal safety in the production operation process is ensured, and production safety accidents are avoided.

The invention discloses a hoisting and transporting device for an aluminum plate coil, and relates to the field of aluminum plate production. The hoisting and transporting device for the aluminum plate coil comprises a hanging plate, a supporting shaft, clamping arms symmetrically arranged, straight rods and a limiting and connecting mechanism, wherein the top end of one of the clamping arms is provided with a matching groove, the top end of the other clamping arm of the clamping arms is provided with a matching block, the supporting shaft is rotatably connected with the side wall of the matching groove and the matching block, first penetrating holes are formed in the positions, close to the lower parts, of the clamping arms, and the inner side faces of the clamping arms are arc-shaped surfaces; and the straight rod is matched with the first penetrating holes. After the aluminum plate coil is located in the space formed by the inner side faces of the clamping arms, the straight rods pass through the first penetrating holes, at least one ends of the straight rods are reserved outside the first penetrating holes, the end parts of the reserved straight rods are located on the same sides of the clamping arms, then the end parts of the straight rods are fixedly connected with the limiting and connecting mechanism, and the aluminum plate coil is limited in the space formed by the inner side surfaces of the clamping arms, so that even shaking is generated in the hoisting and transporting process, the aluminum plate coil falls into the space formed by the inner side surfaces of theclamping arms, and the occurrence of production safety accidents is avoided.

The invention belongs to the technical field of sewing machine accessories and especially provides a novel sewing table structure. The novel sewing table structure comprises a base plate, a back base plate connected to the rear of the base plate, a handpiece mounting hole arranged on the base plate and the back base plate, two slide ways arranged on the base plate of the left and right sides of the handpiece mounting hole. The slide ways extend to the back base plate. Each of the slide ways is provided with two slide plates reciprocating along the slide way. Each adjacent end of the two slide plates is provided with a mounting base. The two slide plates are connected to a moving crossbar by the mounting bases. By use of the novel sewing table structure, the number of seams is greatly reduced and pressure frames or form boards can be unhinderedly operated. The novel sewing table structure is easy in assembly and debugging and has few assembly parts, bringing great convenience for the subsequent maintenance users. By use of the novel sewing table structure, labor-hour is saved.

The invention discloses an ore conveying belt device of a plate-type ore feeder, which is suitable for the modification of OK plate-type ore feeders and ABC annular plate-type ore feeders, and aims to reduce ore adhesion on an ore conveying belt and prolong the service life of the ore conveying belt device of the ore feeder. The device comprises combined trough plates, arc sealing plates and tank chains, wherein a left group and a right group of tank chains are provided; a plurality of combined trough plates are connected in series along the length direction of the tank chains so as to form the ore conveying belt; the combined trough plates comprise ore stopping plates, trough plates, connecting plates, supporting plates, vertical rib plates and transverse rib plates; the trough plates are fixed on the tank chains by bolts; the front ends of the trough plates are provided with the arc sealing plates; the ore stopping plates are arranged on the two sides of each trough plate along the length direction; the sides of the back ends of the ore stopping plates are trapezoids; the bottoms of the back ends of the ore stopping plates are arcs; the dimensions of the arcs correspond to that of the arcs of the sealing plates; a lapped structure is formed between a front group of ore stopping plates and a back group of ore stopping plates; the vertical rib plates and the transverse rib plates are arranged between the trough plates and the connecting plates; the connecting plates are connected with the supporting plates by bolts; and the supporting plates are supported on upper carrier rollers.

The invention belongs to the technical field of production workshop AGV logistics, and discloses a detection channel and a passing method; the detection channel comprises a channel body, a laser sensing device and a sound-light alarm device, wherein two ends of the channel body are respectively provided with a first outlet and a second outlet for allowing passing objects to enter or leave; the laser sensing device comprises a plurality of laser sensor groups which are uniformly arranged above the channel body in the width direction of the channel body, and the laser sensing device is used for detecting the width of a passing object; the sound-light alarm device is in communication connection with the laser sensing device, and when the width of the passing objects passing in the opposite directions is larger than the width of the channel body, the sound-light alarm device sends out an alarm signal. The detection channel can be used for a plurality of passing objects to pass together, the existing building layout of a production workshop is not changed, the transformation period is short, the cost is low, and the space utilization rate of the production workshop is high; furthermore, the passing method is applied to the detection channel, and the collision of passing objects passing in opposite directions is avoided, so that the passing efficiency is improved, and production safety accidents are prevented.