48results about How to "Protect production security" patented technology

The invention discloses an early warning method of coal mining subsidence. The method is characterized in that the growth height of a water flowing fracture zone is judged according to the ultimate roof breaking interval of a key stratum and soft rock and the growth condition of the height, which grows along with the increasing of working face advancing distance, of a free space on the lower portion of the key stratum and soft rock, the possibility of the coal mining subsidence is evaluated by the height of the water flowing fracture zone, the height of the water flowing fracture zone continuously grows along with the increasing of the working face advancing distance, and an early warning is given out when the height of the water flowing fracture zone approaches a critical height, and coal mining subsidence will occur if the working face distance further increases, or else a coal mine is safe. The early warning method of coal mining subsidence has the advantages that underground water is prevented from fast seeping into a goaf area or deep rock along mining cracks, underground water level lowering is prevented, downhole water burst or mine flooding is prevented, precious coal resources can be produced to the maximum extent, and coal mining safety is guaranteed effectively.

The invention provides dustless self discharging type dough mixing equipment for bread making. The dustless self discharging type dough mixing equipment comprises a dough mixing box, a charging box and a water adding box, wherein the charging box is arranged on one side of the dough mixing box; the water adding box is arranged on the other side of the dough mixing box; brackets are respectively welded to the bottom of the dough mixing box, the bottom of the charging box and the bottom of the water adding box; a funnel is welded to the bottom of the charging box; a sucking pipe is welded to thebottom of the funnel; a wind opening and a water pipe are welded to the top of the water adding box; the water pipe is arranged on one side of the wind opening; a communicating machine is mounted onone side of the water adding box; a volume mark is carved on the communicating machine; a temperature sensor is mounted at the top of the water adding box through bolts; a bidirectional motor and a centrifugal fan are mounted at the top of the dough mixing box through bolts; the centrifugal fan is arranged on one side of the bidirectional motor; and the wind pipe is welded to one side of the centrifugal fan. The dustless self discharging type dough mixing equipment for bread making disclosed by the invention is reasonable in design, and is suitable for dustless automatic dough mixing during bread making.

The invention discloses a spodoptera frugiperda insecticide as well as a preparation method and application thereof. The insecticide comprises at least one microbial agent and at least one synergist,wherein the microbial agent consists of bacillus subtilis and a nutritional agent required by the bacillus subtilis; the synergist comprises at least one plant saponin extract. The preparation methodof the insecticide comprises the steps: mixing and fermenting the microbial agent, the nutritional agent and water, and mixing the obtained fermentation liquor with the synergist according to a certain proportion. In practical application, the insecticide can be sprayed to crops, including foliage spraying, ground spraying, flood irrigation and the like. The method has a good prevention and control effect on field pests (especially spodoptera frugiperda), is free of pesticide addition, does not enable crops to generate drug resistance, and has great significance in preventing and controlling spodoptera frugiperda and protecting grain production safety in China.

The invention discloses an automated monitoring system of a coal mine based on a cloud platform. The automated monitoring system comprises a cloud platform server and multiple intelligent acquisitionterminals which scatter around the area of the coal mine. The intelligent acquisition terminals comprise power supply modules, central processors, gas monitoring sensor groups, image acquisition modules, equipment self-check modules, communication modules, alarm modules, oxygen production modules and bluetooth positioning modules. The cloud platform server is in communication connection with the intelligent acquisition terminals. The cloud platform server comprises a data storage module, a data analysis module and a danger prediction module, all of which are orderly connected. The gas monitoring sensor groups, the image acquisition modules, the equipment self-check modules, the communication modules, the alarm modules, the oxygen production modules and the bluetooth positioning modules areall connected with the central processors. The power supply modules are used for providing electric energy. The automated monitoring system of the coal mine based on the cloud platform is conducive to enhancing intelligent level of monitoring of the coal mine.

The invention discloses a method for killing quarantine pests in wool processing leftovers through biological fermentation. The method comprises the steps of (1) preparing complex microbial inoculants, (2) pre-processing the wool processing leftovers, (3) forming a pile body, (4) performing preliminary fermentation and (5) performing high-temperature batch fermentation. Auxiliary materials and high-temperature complex microbial inoculants are added into the leftovers and wastes to perform compost fermentation by means of a biological fermentation method, the heat-producing bacterium effect in the complex microbial inoculants enable the pile body temperature to rise and drop intermittently, and a compost is converted into an organic fertilizer to be reused on the premise that pathogenic microorganism and weed seeds in introduced wool processing leftovers are ensured to be killed or removed. On the one hand, agricultural production safety in our country is ensured, and land resources and environment are protected; and on the other hand, the cost input and energy consumption of manufacturing enterprises are reduced, the using amount of chemical fertilizers used in crop growth is decreased, and organic agriculture development and resource recycling are promoted.

The invention discloses a specific primer pair for identifying tangerine fruit flies and citrus fruit flies and an application thereof. The invention designs a specific primer pair for identifying thetangerine fruit flies and the citrus fruit flies, and develops a molecular identification technology based on conventional PCR. Experiments prove that the molecular identification technology based onthe conventional PCR can achieve the species identification of the tangerine fruit flies and the citrus fruit flies, and has the advantages of strong specificity, high sensitivity, low cost, simple operation and short time consumption. The primer pair not only solves the problem of identifying the species of non-adult fruit flies and residues of the adult fruit flies, but also provides a practical technology and a theoretical basis for monitoring the epidemic situation of the tangerine fruit flies and citrus fruit flies, distributing and invading of the tangerine fruit flies and the citrus fruit flies in main production areas of China, and subsequent plant quarantine and field management. The primer pair is of great significance to effectively prevent further invasion and diffusion of thetangerine fruit flies and citrus fruit flies, protect agricultural production and ecological security, and promote the development of economic and trade in China.

A polyolefine particle with electromagnetic shielding function for plastics is prepared from polyolefine plastics (60-84 wt.%), high-B tourmalinite ore powder (5-15), inorganic filler (5-10), disperser (0.5-1) and aluminium powder (5-15). Said tourmalinite ore powder is the silicate containing B, Al, Si, Mg, Mn, Zn and Ti. The resultant plastics has high effect to shield electromagnetic wave.

The invention discloses a PCR detection method for quickly detecting large coptotermes formosunus, which comprises conventional PCR detection and real-time fluorescence PCR detection. The PCR detection method comprises the following steps: preparing a DNA template for a sample to be detected, designing a specific primer and/or a probe, establishing a PCR reaction system for PCR amplification, andobserving, recording and photographing on a gel imaging system. With the advantage of high speed, stability, reliability and sensitivity, the PCR detection method for quickly detecting large coptotermes formosunus is applied to the detection of different-grade samples of large coptotermes formosunus, and lays a foundation for China's coptotermes formosunus class in molecular classification and therapid identification of sibling species. The result of study can be directly applied to the quarantine identification of large coptotermes formosunus in inward and outward plant quarantine, and has important significance to the production safety protection of agriculture and forestry, biological balance maintenance, public health safety insurance in China.

The invention discloses a device for cold pressing cutting of a tank container in a hot chamber and further provides a method for cold pressing cutting of the tank container in the hot chamber. The device comprises a base, an upper pressing disc, a lower tray, positioning idler wheels, a cutterhead and a motor. The upper pressing disc comprises a fixed end, an elongation arm and a rotating disc end; the fixed end is fixed to the base; the elongated arm extends towards the lower tray and fixes the rotating disc end to the position over the lower tray; the bottom face of the rotating disc end isfixedly connected with a rotating disc through a rotating shaft; and the other end of the lower tray is rotatably fixed to the base. The positioning idler wheels and the cutterhead are oppositely arranged on the two sides of the lower tray; the positioning idler wheels are a pair of rotatable cylinders which are mutually parallelly arranged in the base; and the cutterhead is rotatably fixedly connected with a cutterhead box, and the cutterhead box is connected with the motor. The device and method for cold pressing cutting are safe, reliable and stable, manual remote operation is effectivelyreplaced, and the labor intensity of personnel is lowered.

The invention provides a method for detecting dendroctonus pseudotsugae. The aim of identifying dendroctonus pseudotsugae can be achieved by combining specific primers (HS-F and HS-R) and a probe (HS-P) which are screened by a test in a Taq-Man real-time fluorescent quantitative PCR (Polymerase Chain Reaction) method. The detection method is suitable for quarantine identification of dendroctonus in different states, the defects of a conventional morphological identification method are overcome, and compared with a DNA bar code identification technology applied in the prior art, the primers and the MGB probe are high in specificity and sensitivity, simple in experimental operation and short in consumed time; the identification result is visual and can be obtained by observing an amplification curve; and the research not only can meet the original rapid customs clearance requirement of entry and exit, improve the detection rate, but also can effectively prevent invasion and diffusion of dangerous dendroctonus, and has important significance on protection of agriculture and forestry production and ecological safety in China.

The invention discloses a marine port safety unmanned aerial vehicle detection system. The system comprises an undercarriage arranged at a marine port, a display screen, an alarm, an unmanned aerial vehicle and an upper computer; the unmanned aerial vehicle is in signal connection with the upper computer; the unmanned aerial vehicle comprises an LTE communication module, a UWB positioning module Band a detection unit; the upper computer comprises a central processing module, a state analysis module, an early warning module, a safety evaluation module, a UWB positioning module A and a signal transceiver. The unmanned aerial vehicle is arranged to detect the environment of a marine port, detected data signals are sent to the upper computer through the LTE communication module, the state analysis module in the upper computer analyzes the current state of the marine port, and analyzed data signals are sent to a safety evaluation module; the safety evaluation module evaluates the safety level of the current marine port environment state, gives an alarm to workers in advance, prevents mechanical equipment from being damaged, and protects the personal and production safety.

The invention provides an oil and gas production intelligent monitoring system and method based on NB-IoT and relates to the oil and gas monitoring technology field. By using the system and the method, data acquired by various digital instruments are transmitted to a cloud server through an advanced NB-IoT wireless communication module at regular intervals by a controller in an oil and gas production field; and a transmission protocol type adopts CoAP, definition and deployment of profile and encoding and decoding plug-ins are completed by the cloud server in advance, the data transmitted by the NB-IoT wireless communication module are analyzed and stored, a client program of an upper computer captures the data from cloud, and oil and gas well attribute data monitoring values are displayedto a user. When the monitored data is abnormal and reaches an alarm value, a manager can send a work stopping instruction to a main controller at an upper computer end, takes the cloud as a relay, and stops working of a generator through controlling the relay so that work of a well site kowtow machine is stopped, and low power consumption and high stability in an oil and gas production monitoringprocess are achieved.

The invention discloses a vacuum reflow soldering positive and negative pressure combined welding process, and relates to the technical field of vacuum reflow soldering. The process comprises the following steps that debugging preparation is carried out on vacuum cabin equipment; vacuumizing is carried out in a normal temperature state until the pressure in a vacuum cabin is smaller than or equal to a preset pressure value of 0.05-100PA of negative pressure; the vacuum cabin is filled with a reducing agent into in a normal temperature state until the positive pressure is 1000-500000PA; heating is carried out to reach 160-180 DEG C; then heating is carried out to reach the melting point of welding flux of 217 DEG C; then heating is carried out to reach 245-260 DEG C, and the constant temperature is kept for 1-30 seconds; vacuumizing is carried out for 20-30 seconds, and the vacuum degree in the vacuum cabin is maintained at the negative pressure ranging from 0.01 PA to 100 PA; cooling is carried out; the internal pressure of the vacuum cabin reaches normal pressure; and when it is detected that the preset cooling temperature is reached, a weldment is taken out. According to the process, firstly, under the action of positive pressure, bubbles in the welding flux are removed, then when vacuumizing is carried out to reach the negative pressure, the bubbles in the welding flux are removed again, the discharging time of the bubbles is greatly shortened in a positive pressure and negative pressure combined mode, and therefore the voidage of the welding flux is far lower than the voidage in a traditional process.

The invention discloses a variable-speed tail hook machining equipment with automatic sand blasting and ash removing functions and relates to the technical field of special-shaped component machining and detection. The variable-speed tail hook machining equipment specifically comprises a workbench, a controllable variable-direction sand blasting mechanism, a reset intermittent feeding mechanism, a rotary telescopic mechanism and a tenon-and-mortise clamping mechanism. A control end is arranged on one side of the workbench. According to the variable-speed tail hook machining equipment with the automatic sand blasting and dust removing functions, a rotary telescopic mechanism is arranged, a power source is connected with a grooving rack through a transmission crank to form a transmission structure, and a sliding base on one side of the output end of the grooving rack is driven to be located in a rail to do transverse reciprocating motion; and ,meanwhile, a rotating shaft with a gear at the middle end is connected with a rack through shaft sleeves penetrating through two sides of the top end of a sliding seat, and the rack is driven by a sliding sleeve at the surface end of a guide rod to drive the tenon-and-mortise clamping mechanism at the output end of the rotating shaft to rotate, so that full contact between a sand blasting material and each end face of a tail hook component is realized in the rotary telescopic movement process of the mechanism, and the effect of uniform sand blasting is achieved.