33results about How to "Eliminate major security risks" patented technology

The invention provides a mandatory continuous feeder for a bulk material of mixed grease and glue. The mandatory continuous feeder comprises a radially communicated feeding container and a reducer driven by a motor. A feeding screw shaft (15) connected with a rotary shaft of the reducer is vertically connected with an anti-bridging agitating blade (5) fixedly and extends into a feed inlet (16) of a spiral forming machine (9) vertically. A spiral feeding and spinning feeder (6) consisting of upper, middle and lower layers of spiral feeding and spinning blades in different structures is arranged on the circumference of a rod body at a cone-shaped end of the feeding screw shaft. According to a middle layer screw blade (19) provided with a radial opened diffluent trough (21), one the one hand, materials are in a screw feeding state, and on the other hand, part of materials returns upward through the opening of the blade diffluent trough so as to exhaust and divide the materials. The lower layer screw blade feeds the materials to the feed inlet of a screw press continuously. The mandatory continuous feeder for the bulk material of mixed grease and glue provided by the invention is safe, feeds materials to the screw press stably, does not clot and block, and feeds uniformly. The quality stability in the forming process of a mixed grease blasting explosive is improved.

The embodiment of the invention relates to a communication interface and a communication device and method of a direct-current control system and a stability control device, which are applied to a high-voltage direct-current power transmission system, and the high-voltage direct-current power transmission system comprises two pole controllers of a converter station pole 1 and a converter station pole 2, the stability control device and a direct-current station controller. The communication device of the direct current control system and the stability control device comprises a first communication unit, a second communication unit and a control unit. By adding the second communication unit, the control unit controls the second communication unit to operate when abnormal locking signals cannot be sent to the stability control device after a pole control dual system of the high-voltage direct-current power transmission system is shut down, so that the direct-current station controller transmits pole control abnormal locking information to the stability control device, and the stability control device can correctly and reliably act on an outlet; safe and stable operation of a power grid is guaranteed, the technical problem that abnormal locking signals cannot be sent to a stability control device after two pole controllers in an existing high-voltage direct-current power transmission project are shut down is solved, and major potential safety hazards possibly caused by refusal of the stability control device are eliminated.

The invention relates to the technical field of municipal engineering devices, and provides a municipal anti-theft manhole cover. The manhole cover comprises a cover body, wherein the cover body is arranged on a base; drain holes, which are used for conducting drainage, are arranged in the cover body; a locking mechanism, by which the cover body is locked on the base, is arranged on the cover body; an opening component, which is used for opening the locking mechanism, is arranged at the bottom of the cover body; and the opening component is arranged between the cover body and the base. The cover body can be stably fixed to the base under a locking effect of the locking mechanism, so that a problem that the manhole cover can be stolen easily can be solved, and serious injuries on pedestrians and vehicles due to the absence of the manhole cover can be effectively prevented.

The invention discloses a coke oven heating system, which is characterized in that limit switches are respectively arranged at motion limit positions at two ends of a piston rod of each hydraulic oilcylinder; piston rod flanges are arranged at two ends of the piston rod; when the piston rod flange moves to a limit position, the piston rod flange triggers the corresponding limit switch; and the limit switch obtains the information of the actual state of the piston motion of the hydraulic oil cylinder and sends the information to a control unit of the coke oven heating system. The invention further discloses an exchange heating control method of the heating system. According to the invention, hydraulic faults are analyzed and diagnosed by optimizing safety linkage and adding the oil path pressure detection device, so that the major potential safety hazard of the heating system when the hydraulic system fails in the prior art is eliminated, the hydraulic faults of the gas heating systemcan be identified in time, and safe shutdown is completed. Therefore, the safety performance of the coke oven heating system is effectively improved.

The invention discloses double-sided continuous polishing production equipment for a saw chain guide plate. The double-sided continuous polishing production equipment comprises an automatic feeding machine, an A-side polishing machine, an automatic turnover machine, a B-side polishing machine and a cleaning machine, wherein the automatic feeding machine conveys the saw chain guide plate to the A-side polishing machine; the A-side polishing machine polishes an A side of the saw chain guide plate; the automatic turnover machine turns over and conveys the saw chain guide plate to the B-side polishing machine; the B-side polishing machine polishes the B side of the saw chain guide plate; the cleaning machine cleans the saw chain guide plate; and the A-side polishing machine and the B-side polishing machine adopts water grinding type polishing. The double-sided continuous polishing production equipment can realize automatic feeding and automatic turnover, so that continuous A-side polishing, B-side polishing and washing can be accomplished through the saw chain guide plate, and thus, efficiency is improved.

The invention relates to a wet process desulphurization dust removal device, which comprises a comprehensive tower, a heat exchanger mounted at the top end of the comprehensive tower, a reverse spraypipe connected with the heat exchanger and the comprehensive tower and arranged in a communicating manner, a rapid solid-liquid separator matched with the comprehensive tower for use, an air cooling calandria matched with the rapid solid-liquid separator for use, and a cooling tower matched with the air cooling calandria for use. According to the invention, the device is reasonable in structure and good in using effect, integrates flue gas purification, desulfurization, dust removal, water control and smoke abatement, and achieves high-efficiency desulfurization and dust removal, the emissionindex of the device can completely meet and exceed the ultra-clean emission requirement implemented at present, water resources used for smoke control can be recovered so as to recycle the water resource, the huge condition of flue gas desulfurization and dust removal equipment is changed, the occupied area is small, the equipment capital investment is reduced, energy-saving operation can be achieved, the cost is saved, and popularization is worth.

The invention discloses a method for caving a large goaf of an underground mine and eliminating the goaf. The method comprises the following steps: dividing 2-6 operation areas or explosion areas in a goaf surrounding rock (3) on the periphery of the goaf (1); 3-6 deep hole drilling chambers (9) are arranged in the goaf surrounding rock (3) in each operation area or explosion area, and the deep hole drilling chambers (9) of all layers are communicated through chamber connection wells (10); the method comprises the following steps: arranging a roadway project, namely a connection gate way (6), a connection inclined shaft (7) or a connection raise, between an existing project and a deep hole drilling chamber (9); a caving horizontal deep hole (12) is formed in the deep hole drilling chamber (9) on the middle-lower layer, and a horizontal and upward fan-shaped cutting weakening deep hole (13) is formed in the deep hole drilling chamber (9) on the upper layer. According to the method, the underground engineering amount, the explosive amount of deep hole blasting and the harm caused by air shock waves brought by large-area caving of the goaf are reduced, the construction cost is reduced, and potential safety hazards existing in the large goaf are eliminated.

The invention relates to the technical field of smelting, in particular to a method for preventing a tuyere sleeve of a blast furnace from sinking. The method comprises the following steps of increasing the alkali discharge rate of an iron notch: specifically controlling the quaternary alkalinity of slag to be 0.95-0.98 times; increasing the contact area between a tuyere small sleeve and a tuyeremiddle sleeve; and adding fixing supports at the tuyere position: specifically arranging two supporting frames on the outer side of a tuyere large sleeve, and fixedly connecting the two supporting frames with a furnace shell around the tuyere; fixedly connecting a connecting frame between the two supporting frames, and extending to the position below the tuyere small sleeve; and fixedly installingan arc-shaped bracket on the connecting frame, and supporting the arc-shaped bracket below the tuyere small sleeve. The method provided by the invention is low in cost and simple and effective in operation, and potential safety hazards caused by sinking of the tuyere small sleeve are avoided.

The invention relates to a method for heating pyridine salt B3 to prompt a chlorination reaction. The method is characterized in that: an electric heater and a chlorination reaction kettle are connected through a pipeline to form a closed loop; a pipeline connecting the chlorination reaction kettle to the electric heater is connected to an emptying groove through a branch pipeline; the method comprises the following steps: (1) taking dichloromethane as a solvent and sufficiently dissolving a 3-methoxy-2-methyl-4-pyridone dry product in an amination work section, so as to obtain a solution; dropwise adding phosphorus oxychloride into the solution; (2) injecting heat-conducting oil into a heat-conducting oil heating system, and keeping oil pressure at 0.2-0.4 MPa and oil temperature at 90 DEG C in order to ensure that an oil path passes the chlorination reaction kettle smoothly; heating the chlorination reaction kettle to 80-85 DEG C and refluxing and carrying out heat insulation to react for 8 hours; and (3) recycling excessive dichloromethane in a temperature raising and heat insulation process, and conveying a generated product into a decompression and recycling working section. The method provided by the invention has the advantages that the heat-conducting oil is stable in property and can effectively avoid sudden explosion accidents; a complete reaction can be ensured and the reaction yield is maximized; and the energy loss rate is low, scale is not formed after equipment is used for a long period and the heat exchange efficiency is higher.

The invention discloses a high-efficient dedusting device for a garment production workshop. The device comprises a base, wherein support rods are fixedly connected to the top part of the base; a support plate is fixedly connected to one opposite sides of the two support rods; shaft rods are rotatably connected into the support plate; first gears are fixedly connected to the top ends of the shaftrods; connecting blocks are fixedly connected to the top part of the support plate; fixing pipes are fixedly connected to one opposite sides of each two connecting blocks; rotary pipes are rotatably connected to the top ends of the fixing pipes; second gears are fixedly connected to the surfaces of the rotary pipes. The device relates to the technical field of garment production. According to thehigh-efficient dedusting device for the garment production workshop, the problem that a large number of fiber dust can be produced during a garment production process is solved, the human health is prevented from being harmed, a certain of big potential safety hazard is eliminated, the dedusting efficiency is greatly improved, enterprise production is facilitated, and the enterprise profit is increased.

The invention discloses a structural arrangement suitable for caving treatment of a large goaf of an underground mine. Two to six operation areas or explosion areas are divided in a goaf surrounding rock (3) on the periphery of the goaf (1); 3-6 deep hole drilling chambers (9) are arranged in the goaf surrounding rock (3) in each operation area or explosion area, and the deep hole drilling chambers (9) of all layers are communicated through chamber connection wells (10); the method comprises the following steps: arranging a roadway project, namely a connection gate way (6), a connection inclined shaft (7) or a connection raise, between an existing project and a deep hole drilling chamber (9); a caving horizontal deep hole (12) is formed in the deep hole drilling chamber (9) on the middle-lower layer, and a horizontal and upward fan-shaped cutting weakening deep hole (13) is formed in the deep hole drilling chamber (9) on the upper layer. According to the method, the underground engineering amount, the explosive amount of deep hole blasting and the harm caused by air shock waves brought by large-area caving of the goaf are reduced, the construction cost is reduced, and potential safety hazards existing in the large goaf are eliminated.

The invention discloses a water supply and drainage pipe head connecting mold, which is used for filling, flattening and butting water supply and drainage pipe heads, and comprises an injection mold detachably connected to the end part of the water supply and drainage pipe head. When the injection mold is connected to the end of the water supply and drainage pipe head, the injection mold is used for injection molding filling and leveling, so that the end of the water supply and drainage pipe head is filled and leveled, and the connector is obtained. And the butt welding mold is arranged on the injection mold, the side wall of the butt welding mold is connected with the side wall of the injection mold, and the butt welding mold is used for conducting butt joint connection on the drainage pipe heads subjected to injection molding through the injection mold. The device is simple in overall structure, convenient to disassemble and suitable for connection of various water supply and drainage pipes of buried water pipes, and has a remarkable practical effect. The invention further discloses a use method of the water supply and drainage pipe head connecting mold, a product based on the water supply and drainage pipe head connecting mold and a preparation method of the product based on the water supply and drainage pipe head connecting mold.