51results about How to "Meet the actual needs of the site" patented technology

The invention discloses a fire evacuation system and an evacuation method. The fire evacuation system comprises a fire evacuation acoustic-optical indicating system, an acoustic-optical power supply system, a fire parameter detection system, a control system and a fire alarm system; the fire evacuation acoustic-optical indicating system, the acoustic-optical power supply system and the control system and electrically connected mutually; the acoustic-optical power supply system continuously supplies power for a lamp assembly in the fire evacuation system; the control system controls the acoustic-optical power supply system to supply power for a voice prompt device in the fire evacuation acoustic-optical indicating system through a second power supply circuit and controls the luminance of the lamp assembly and acoustic-optical contents of the fire evacuation acoustic-optical indicating system through the control circuit; the fire parameter detection system and the control system are electrically connected to the fire alarm system through data transmission lines respectively. The fire evacuation system can provide different evacuation guidance for users at different floors according to point locations of fires and fire conditions of fire scenes and avoids the users from running to error channels or taking error actions and accordingly gets into danger.

The invention discloses a coal gas remote meter reading system, which comprises a GSM main module and a collection flow meter instrument module EK, a collection flow meter instrument module CORUS, a PLC module and an isolated power supply module which are connected with the GSM main module, wherein the GSM main module encrypts based on a KEELOQ algorithm while performing GPRS/CDMA transmission, an instrument terminal needs to study with a host so as to communicate with the host, and in the studying process, the instrument terminal sends a serial number and an encryption key EN_KEY to the host, and the host generates a random number. The coal gas remote meter reading system has the advantages of adopting GPRS/CDMA to effectively perform remote transmission and using an encryption technique to successfully solve the problem of incomplete data packets in the process of the GPRS/CDMA transmission. Besides, the mode of power supply adopts power supply modules of an explosion-proof power supply and an intrinsically safe power supply module to flexibly satisfy on-site actual needs.

The invention discloses a method and a system for carrying out field calibration on the transient characteristics of a direct-current voltage measuring device. The method comprises the following steps: acquiring a transient waveform when a system has a fault, storing the transient waveform in a main control unit, performing digital-to-analog conversion on the transient waveform through a signal processing unit, and sending an analog signal subjected to filtering processing to a power amplification unit; amplifying the analog signal through the power amplification unit, and selecting a corresponding output port; collecting an output analog signal of the power amplification unit through a high-precision collection device, comparing the waveform of the analog signal with a transient waveformstored in the main control unit, and closing an output port of the power amplification unit when a comparison result conforms to a waveform error allowable range; and connecting an output port of thepower amplification unit to a direct-current voltage measuring device to be measured to form a loop, and connecting the high-precision acquisition device to a secondary terminal of the direct-currentvoltage measuring device to obtain a secondary output waveform of the direct-current voltage measuring device to be measured.

The invention discloses a track circuit transmission characteristic quantitative evaluation method based on variational mode decomposition. According to the method, locomotive signals or track circuitinduction signals of a dynamic inspection vehicle are collected, transmission characteristics of a track circuit are obtained by using processing methods such as variational mode decomposition and the like, and then the transmission characteristics of the track circuit of each track section of the line are scored by an adaptive scoring function, so that visual quantitative evaluation of the transmission characteristics of the track circuit is completed. The method is good in applicability, and can meet the requirements for evaluating the transmission characteristic performance of the track circuit at present.

The invention discloses a heat and humidity exchange simulation testing system for a non-coal solid mine deep mining excavation tunnel. A simulated tunnel is a rectangular grotto obtained through being scaled down according to a field practical blind excavation tunnel, the upper side, the lower side, the left side, the right side and one end of the rectangular grotto are sealed, a tunnel heat source simulation device consists of an electric heating film (5) and a heating control device (10), an in-tunnel humidity environment simulation device is formed by connecting a humidifier pipe (6) with a humidifier (11), an in-tunnel fresh air quality simulation device is formed by sequentially connecting a fan (12), a humidifier (11'), an electric heater (14) and a fresh air pipe (16), and a tunnel temperature reduction refrigeration simulation device consists of a refrigeration machine set (1), an air cooler (4) and a cold air pipe (15). The heat and humidity exchange simulation testing system has the advantages that the field real heat and humidity exchange environment is provided for researching heat and humidity exchange of air in the blind tunnel, the field simulation verification in a laboratory is realized on theoretical calculation results, and good practical significance popularization and application values are realized for solving the heat damage problem of the existing deep well mining.

The invention discloses a ship cabin coating method. The method includes the steps that the total spraying amount and maximum spraying planning time of spraying oil paint and diluent needed by a cabinare confirmed; the minimum spraying amount required in unit time is acquired according to the total spraying amount and the maximum spraying planning time; the specifications of spray guns are selected, the number of the spray guns which operate at the same time is set, and the prediction spraying amount of all the set spray guns in unit time is calculated, so that the prediction spraying amountis larger than the minimum spraying amount; the minimum ventilation rate in unit time is worked out according to the prediction spraying amount, diluent type and organic solvent poisoning prevention planning value; the draught fan type is selected, the number of draught fans is set, and the prediction ventilation rate of the set draught fans in unit time is made to be larger than the minimum ventilation rate; and spraying is conducted after the draught fans are arranged. The ship cabin coating method has the beneficial effect that a ventilation rate calculation method which is more suitable for the field actual needs is formulated before spraying in accordance with the actual spraying portions, spraying paint and actual spray gun number.

The invention discloses a repairing device for surface abrasion of a large wheel fixing table base. The repairing device comprises a welding robot, a structural part supporting platform, a heating device arranged on the structural part supporting platform, a mechanical arm base and a mechanical arm lifting adjusting device; the mechanical arm lifting adjusting device is movably arranged on the mechanical arm base and can lift for adjustment on the mechanical arm base; and a base of the welding robot is arranged on the mechanical arm lifting adjusting device. A repairing process based on the repairing device for the surface abrasion of the large wheel fixing table base is further disclosed. The repairing process is implemented, through welding verification, welding repair of the abrasion of the large wheel fixing table base can be rapidly implemented, the purchase cost is reduced, the long-time procedure shutdown loss is reduced, and a guarantee is provided for reasonably grouping and producing various domestic and overseas wheels.

The invention discloses a large-scale heat-resistant steel heating furnace door manual gas welding repair device. A furnace door is of a cuboid hollow structure and comprises a furnace door front panel and a furnace door rear panel. A plurality of fixed rods are uniformly arranged inside the furnace door front panel and the furnace door rear panel. The large-scale heat-resistant steel heating furnace door manual gas welding repair device further comprises a rectangular fixed bottom steel plate, a pressure test water inlet pipe and a pressure test water outlet pipe. A plurality of sets of vertical H-steel supporting frames are arranged on the fixed bottom steel plate in bilateral symmetry. A transverse H-steel supporting frame with the height less than the vertical H-steel supporting framesis arranged between each set of the vertical H-steel supporting frames. The pressure test water inlet pipe and the pressure test water outlet pipe are arranged on the two sides of the interior of thefurnace door correspondingly. The pipe heads of one ends of the pressure test water inlet pipe and the pressure test water outlet pipe face upwards. The large-scale heat-resistant steel heating furnace door manual gas welding repair device is safe and easy to operate, stable in welding quality, low in investment cost and high in working efficiency, meets the actual demands on site, greatly reduces the maintenance cost, reduces shutdown loss during the process of heating an annular furnace and provides a guarantee for reasonable assembly production of various specifications of wheels and ringparts and heating steel ingots.

The invention discloses a closed-loop control system early failure detection and diagnosis method, and the method comprises the following steps: S0, building an on-site real closed-loop control systemaccording to actual needs; S1, based on a data assimilation technology and a mathematical mechanism model of equipment, building a virtual closed-loop control system; S2, based on the real closed-loop control system and the virtual closed-loop control system, analyzing to obtain residual error of the real closed-loop control system relative to the virtual closed-loop control system; S3, accordingto the obtained residual error, identifying failure type in the real closed-loop control system. With the method and the system provided by the invention, technical problems of low accuracy of smallfailure diagnosis and difficulty in diagnosis in the prior art are solved, and the small failure in the closed-loop control system can be identified quickly and accurately.

The invention relates to an extra-thick coal seam gob-side coal roadway digging time design method based on a double-index weight method. The method comprises the following steps: 1) determining gob-side roadway digging time T1 by taking basic roof subsidence as an index, 2) determining reasonable digging time T2 by taking roadway surrounding rock deformation rate as a time index; and 3) determining reasonable gob-side roadway digging time T. The basic roof subsidence and the overlying strata movement stabilization time are obtained on the basis of fully considering the difference of coal androck mass so that the field reality is better met and the result is more accurate; the roadway surrounding rock deformation rate is introduced as an additional index to form a double-index system of gob-side coal roadway digging time; 70% of the maximum basic roof subsidence value and the surrounding rock deformation rate (4mm/day) are proposed as evaluation indexes of the roadway digging time andthe weight ratio of the two is determined according to specific geological conditions, the gob-side roadway digging time is comprehensively obtained, the gob-side roadway surrounding rock safety andstability are guaranteed, the extra-thick coal seam gob-side roadway digging time is shortened and normal replacement of digging is guaranteed.

The invention relates to a dual-index method for quantitatively judging gob-side entry driving time of an extra-thick coal seam. The dual-index method comprises the following steps: (1) determining gob-side entry driving time T1 by taking main roof subsidence as an index; (2) determining reasonable driving time T2 by taking entry surrounding rock fracture development depth as a time index; (3) determining the reasonable gob-side entry driving time T. The dual-index method obtains the main roof subsidence and overburden rock movement stability time on the basis of fully considering the difference between coal and a rock mass, and is more consistent with actual conditions on site and more accurate in result. The dual-index method introduces the entry surrounding rock fracture development depth as the additional index, so that a dual-index system for the gob-side entry driving time is formed. The dual-index method takes 70% of a maximum main roof subsidence value and 80% of a maximum fracture depth as evaluation indexes of the entry driving time, and determines the weight proportion of the maximum main roof subsidence value and the maximum fracture depth according to specific geological conditions so as to comprehensively obtain the gob-side entry driving time, thereby ensuring the safety and stability of surrounding rocks of a gob-side entry, reducing the gob-side entry driving time of the extra-thick coal seam, and guaranteeing normal replacement of mining and driving.

The invention discloses a welding auxiliary device and welding process for fractures of a mandrel baffle plate of a flat uncoiling machine. The device comprises a front end fixed support and a rear inclined end fixed support. The upper portion of the front end fixed support is in a circular arc shape. The rear inclined end fixed support comprises a body supporting steel frame, side wing supporting steel frames are fixedly arranged on the two sides of the body supporting steel frame correspondingly, and a supporting steel plate is rotationally arranged on the upper portion of the body supporting steel frame. The process for welding and repairing the fractured part of the mandrel baffle plate of the flat uncoiling machine by using the welding auxiliary device is further disclosed. The fractured part and the local chipping part of the mandrel baffle plate of the flat uncoiling machine are subjected to surfacing repair by using a multifunctional micro-arc additive manufacturing machine and welding repair by manual argon arc welding, the maintenance time is saved, the maintenance cost is reduced, the shutdown loss is reduced, and a guarantee is provided for reasonable production combination.

The invention discloses a bottom shell and welding seam assembly tool structure for an electromagnetic chuck for hoisting and transporting wheel steel ingots and a repair process for the bottom shelland welding seam assembly tool structure. The tool structure comprises a circular bottom shell and an upper cover panel welded on the bottom shell, and further comprsies a welding gun, wherein a jointof the circular bottom shell and the upper cover panel defines a welding seam; a plurality of upper fixing devices are uniformly arranged on the upper surface of the upper cover panel; each upper fixing device is connected to a hoisting ring through a connecting chain; a plurality of hook head clamps are uniformly arranged along the periphery on the bottom shell and the upper cover panel; each hook head clamp comprises a hook head clamp body in the shape of U with an opening facing leftwards, the upper part and the lower part of the hook head clamp body are separately a hook head upper clamping plate and a hook head lower clamping plate, and a distance between the hook head upper clamping plate and the hook head lower clamping plate is equal to sum of height of the bottom shell and heightof the upper cover panel; a wire hole is formed in the hook head upper clamping plate; and a full-thread bolt which is adaptive to the wire hole is arranged in the wire hole. The bottom shell and welding seam assembly tool structure disclosed by the invention can perform online welding repair for fracture of the bottom shell on the electromagnetic chuck, saves maintenance time, reduces maintenance cost, reduces breakdown loss, and provides guarantee for reasonable assembly and production.

The invention discloses a converter backing ring body lug fixing assembly welding structure. The welding structure comprises a converter backing ring body and three pairs of lugs evenly arranged along the circumference of the upper surface of the converter backing ring body, each pair of lugs comprises a first lug and a second lug, and shaft holes are formed in the centers of the first lugs and the centers of the second lugs; and the shaft holes corresponding to each pair of lugs are connected through a full-thread fixed connecting rod. The welding structure mainly aims at solving the problems that in the prior art, secondary machining or repairing of a pin shaft hole is prone to occurring in a traditional method that lifting lugs are arranged on a backing ring in a paired welding mode, and a backing welding method is time-consuming and prone to damaging the body structure condition during back gouging. By means of the welding structure, converter backing ring body lug fixing assembly welding can be rapidly completed, the quality is ensured, the effect is improved, and a guarantee is provided for follow-up accurate assembling.

The invention discloses a stud embedding device on a roller of a mine high-pressure roller mill and a repair welding process thereof. The high-pressure roller mill comprises a left side rack and a right side rack, wherein an extrusion roller is arranged on the left side rack and the right side rack through an universal coupling, a plurality of studs are evenly arranged on the outer side of the extrusion roller, a left side sleeper and a right side sleeper are arranged at the bottoms of the left side rack and the right side rack respectively, a stud embedding and drilling device is arranged atthe top of the left rack, a heating device is arranged on the right rack, and the stud embedding device further comprises a welding gun. The stud embedding device and the repair welding process thereof have the advantages of being safe, easy to operate, stable in welding quality, low in investment cost, high in working efficiency and capable of meeting actual field requirements, greatly reducing maintenance cost, reducing shutdown loss, reducing labor intensity of workers and providing guarantee for reasonable production assembly, and meanwhile, the stud embedding device on the roller of the mine high-pressure roller mill and the repair welding process provide scientific reference basis for online repair of other mine large workpieces.