195 results about "Oil pollution" patented technology

The invention discloses a hydraulic engineering motor set fault early warning system, and relates to the technical field of hydraulic engineering equipment monitoring, and the hydraulic engineering motor set fault early warning system comprises the following steps: S1, collecting and integrating mechanical state data, including vibration, temperature and oil pollution monitoring; s2, electrical parameter monitoring and complementary analysis are carried out, and mechanical data are associated to identify faults such as short circuit; s3, hydraulic monitoring and cooperative early warning are carried out, pressure flow abnormity is detected, and mechanical and electrical data are linked; s4, multi-source data fusion and fault classification are carried out, and dynamic weight distribution is carried out to improve the diagnosis accuracy; s5, dynamic threshold optimization and cloud decision making are carried out, and the threshold is adjusted according to working conditions to reduce the false alarm rate; s6, closed-loop maintenance and intelligent pushing are carried out, faults are positioned, maintenance suggestions are pushed, and closed-loop verification is carried out; the method has the beneficial effects that accurate fault classification, cross-dimension collaborative early warning and closed-loop maintenance decision making are realized, and the operation reliability and the maintenance efficiency of the unit are remarkably improved.

The invention relates to the technical field of wind driven generator monitoring, in particular to a fan fault early warning and diagnosis method fusing multi-modal time sequence data, which comprises the following steps: respectively acquiring vibration time sequence data, current time sequence data and temperature time sequence data of a fan, and respectively calculating a first feature sequence, a second feature sequence and a third feature sequence; generating a fault early warning signal based on a three-state polarity synchronous counting mechanism; calculating a dispersion statistical value, and executing chronic fault diagnosis; when the fan is in a low-load steady-state working condition, active lubrication state detection and feedback are executed; when the first feature sequence is calculated, synchronously executing adjoint oil product pollution diagnosis; and the environment temperature is judged through the temperature time sequence data, and low-temperature working condition adaptability compensation is executed under the low-temperature working condition. The main purpose of the invention is to solve the problems in the prior art that early fault signs cannot be effectively captured due to information loss during fusion processing of multi-modal data, and real faults and external interference are difficult to distinguish.

The invention discloses an automatic transformer disassembly process, which relates to the technical field of transformer disassembly and comprises the steps of oil drainage, oil standing, weighing, cutting of bolts between an upper cover and a shell, hoisting and cutting separation of the upper cover and a battery cell, cutting separation of the upper cover and an upper frame, battery cell carrying, silicon steel sheet (or silicon steel sheet) extraction, copper winding pulling out, bottom frame output and the like. Automatic disassembly of transformers can be achieved, the whole disassembly process is operated in a closed-loop mode in a container, disassembly work of 72 transformers can be completed in one day, safety accidents can be avoided, the disassembly efficiency is improved, and the problems that in a traditional operation mode, operators are exposed to occupational health risks such as oil contamination leakage and mechanical injury for a long time, and the working efficiency is high are solved. And the operation standardization degree is low due to excessive dependence on artificial experience.

The utility model discloses a gun barrel type machine vision detection mechanism for high oil contamination occasions, which comprises a displacement sliding table, a rotating shaft sleeve is movably arranged on one side of the displacement sliding table, a camera shaft sleeve is inserted into the lower end of the rotating shaft sleeve, and a first sealing ring is mounted at the joint of the camera shaft sleeve and the rotating shaft sleeve. A second sealing ring is mounted at the joint of the light source shaft sleeve and the camera shaft sleeve, a camera is mounted in the camera shaft sleeve, a lens is arranged below the camera, a light source is mounted in the bottom end of the light source shaft sleeve, and a third sealing ring is mounted at the joint of the light source and the light source shaft sleeve. The integrated design of the camera, the lens and the light source is adopted, the rotating shaft sleeve can drive the camera and the light source to rotate together, and the adjusting efficiency of the camera is improved; sealing rings are further arranged at the connecting positions of all the components, oil stains can be effectively prevented from invading the interior of the machine body to corrode the camera, and the service life of the detection mechanism is prolonged.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The invention relates to a titanium alloy seamless tube online degreasing device and method.The device comprises a pre-oil-scraping device (42), an outer wall degreasing device (43) and an inner wall degreasing device (44), the pre-oil-scraping device (42) comprises an outer wall oil wiper (4) and an inner wall oil wiper (5), and pre-degreasing is achieved; the outer wall is degreased through a hot water spraying device (15), a degreasing fluid spraying device (16), a brush cleaning device (17), a magnetic polishing degreasing device (18), an annular water jet cutter (19) and an annular air knife (20) of the outer wall degreasing device (43); and the inner wall degreasing device (44) is used for degreasing the inner walls of the two ends of the titanium tube (2) clamped by the quick-plug connectors (36). The method comprises the following steps: S1, physical pre-scraping; s2, online outer wall degreasing; and S3, online inner wall degreasing. And directly connecting with a rolling mill to realize continuous degreasing. The problems that in the prior art, manual participation is large, production continuity is weak, the degreasing effect is poor, and rolling oil pollutes the production environment due to off-line degreasing are solved.

The invention relates to the technical field of sewage treatment, and discloses a heavy dirty oil treatment method and system based on three-phase separation, and the method comprises the steps: determining to-be-treated heavy dirty oil, sampling the to-be-treated heavy dirty oil to obtain a heavy dirty oil sample, determining a sample treatment score based on a test group, an initial water content, an initial metal content and the heavy dirty oil sample, summarizing the sample processing scores to obtain a plurality of sample processing scores, determining an optimal sample score based on the plurality of sample processing scores, taking a test group corresponding to the optimal sample score as an optimal test group, determining a preprocessed raw material and a three-phase separation mechanism based on the optimal test group, and performing quality detection on the oil-phase substance. And obtaining a quality detection score, determining a corrected separation parameter based on the quality detection score and the basic separation parameter, and determining a final oil-phase substance based on the corrected separation parameter, the three-phase separation mechanism and the oil-phase substance, thereby completing heavy dirty oil treatment. The treatment effect and the treatment quality of the heavy dirty oil treatment process can be improved.

The application discloses a construction method of a cigarette oil fume rapid identification marking system, uses oily fluorescent nano quantum dots as a signal part of a marking system, constructs a marking system capable of simultaneously marking multiple oil points, and after oil fume pollution is found in a production process, can quickly and accurately determine oil leakage and hidden point positions according to the markers on the cigarettes, avoids repeated appearance of the oil fume due to the fact that the problem point position cannot be found, and does not affect the efficacy of the oil product, effectively improves the efficiency and accuracy of cigarette oil pollution identification, and timely finds the oil pollution positions, so that the process consumption is reduced, and the quality of the cigarette product is improved.

The invention discloses an automobile active suspension high-pressure oil pump testing device and a using method thereof. The device comprises a pre-pressing tank, a testing unit and a circulating oil way. The pre-pressing tank is used for storing oil and providing stable pre-pressure; the testing unit is used for mounting and driving a high-pressure oil pump with first and second pump ports; the circulating oil path is connected between the pre-pressing tank and two pump ports of the high-pressure oil pump to form a closed circulating loop, and comprises a loading module and a one-way valve assembly; the one-way valve assembly can automatically guide the flowing direction of oil according to the rotating direction of the high-pressure oil pump, so that any pump opening serves as an oil inlet when rotating forwards and serves as an oil outlet when rotating backwards. According to the design, self-adaptive switching of an oil way is achieved in a pure hydraulic mode, forward and reverse rotation performance testing of the oil pump can be completed without disassembling a pipeline, the problems of pre-pressure fluctuation, oil pollution and low efficiency caused by system opening in a traditional method are effectively solved, and the testing reliability and efficiency are remarkably improved.

The invention relates to the technical field of aero-engine starter systems, and discloses an axial displacement control type overrun clutch which comprises a clutch body, a damper and an output shaft, the clutch body comprises a deep groove ball bearing, an input shaft, a diaphragm spring set, a spline shaft, a fixing pin, a conversion lining, a ball bearing, a driving gear, a lock washer and a locking nut; the damper comprises a retainer, a damping block and a spring, the output shaft is supported on the starter shell through a deep groove ball bearing, the input end of the output shaft is provided with end teeth, and when the driving gear stretches out and is meshed with the end teeth, the transmission function is achieved. The output end of the output shaft is of an internal spline structure and serves as a torque output connector. By means of the torque-displacement conversion characteristic of the left-hand thread pair, accurate meshing and physical isolation disengaging of the input shaft and the output shaft are achieved. A three-stage transmission control structure is adopted and comprises a torque-displacement conversion module, a damping control module and a spiral meshing module, and the technical defects that a traditional inclined strut type clutch is polluted in lubricating oil, low in torque transmission efficiency and the like are overcome.

The invention relates to the technical field of data processing, and discloses a self-adaptive pressure compensation method and system for an underwater propeller. The method comprises the following steps: establishing a quantitative relation between pressure difference and diaphragm deformation in a ground calibration stage, calculating a reference damping ratio, providing an accurate reference for judging oil degradation, collecting pressure difference deviation data in an operation cycle, and adaptively tracking oil viscosity time-varying drift through an iterative learning law; the defect that traditional fixed parameter control cannot adapt to working condition changes is overcome, active prediction adjustment is achieved in combination with a fractional order control algorithm and a feedforward compensation mechanism, the transient pressure difference peak value is reduced, and the full-life-cycle high-precision compensation capacity is kept through continuous learning and reference updating. By integrating conductivity monitoring and a filter screen self-cleaning mechanism, the problems of an oil pollution detection blind area and an unreasonable maintenance period are solved, and the long-term stability and the intelligent level of a compensation system are improved.

The present application relates to the technical field of environmental monitoring of oil pollution area, and particularly relates to a multi-channel parallel acquisition interwell three-dimensional resistivity monitoring system and method for oil storage area. The power supply, the host, the multi-channel parallel acquisition device and the four-pole AM-BN acquisition device are sequentially connected. The multi-channel parallel acquisition device comprises a multi-channel electrode conversion box, a plurality of potential channel sockets are arranged in the multi-channel electrode conversion box, the number of the potential channel sockets is the same as the number of probes, twenty-four potential channels are arranged in each potential channel socket, a relay and a current channel switch are arranged in each channel, one end of the relay is connected with a corresponding electrode on the resistivity probe, and the other end of the relay is connected with an acquisition module. The system has high acquisition efficiency, can better realize real-time monitoring of leakage, has high monitoring precision, can accurately identify small leakage in the oil storage area, and realizes remote in-situ monitoring of oil pollution area leakage.

The invention belongs to the technical field of sewage treatment, particularly relates to a sewage discharge treatment device for nitrogen generation equipment, and provides the following scheme aiming at the problems of large pressure fluctuation, incomplete separation, difficulty in oil stain treatment, low automation, poor linkage and the like in the prior art: the sewage discharge treatment device comprises a treatment equipment body; the supporting frame is arranged in the treatment equipment body; the water inlet pressure stabilizing mechanism is arranged on the left side of the treatment equipment body and is used for balancing pressure fluctuation of sewage discharged by the nitrogen making equipment; through collaborative innovation design of multiple devices such as water inlet pressure stabilization, multi-stage separation, ultrasonic demulsification, linkage cleaning and fine filtration, the core problems of incomplete separation, difficulty in oil stain treatment, low automation and the like of a sewage disposal device of existing nitrogen making equipment are effectively solved, high efficiency, automation and standard reaching of sewage treatment are realized, and the sewage disposal efficiency is improved. A reliable pollution discharge treatment scheme is provided for environment-friendly operation of nitrogen making equipment, and remarkable environment-friendly benefits and practical value are achieved.

The invention relates to a biprism spectrograph for water body detection, relates to the technical field of spectrograph design and analysis, and solves the technical problems of insufficient real-time performance, poor long-term stability, limited index coverage and insufficient anti-interference capability of a spectral analysis technology in the prior art. The biprism spectrometer comprises a light source, a slit, a spherical reflector, a biprism assembly, a turn-back mirror, an imaging mirror, a linear array detector and a data acquisition, processing and control device which are sequentially arranged in the light path direction, the light source is connected with the slit through an optical fiber. The biprism spectrometer for water body detection is suitable for scenes such as lake and reservoir algae bloom early warning, estuary and industrial / municipal discharge port supervision, disinfection tank by-product and residual chlorine fingerprint tracking, drinking water plant online protection and the like, and can be expanded to tasks such as oil stain identification, dissolved organic matter characterization and on-site rapid fingerprint comparison.

The invention provides a circuit breaker split-phase pressing signal abnormity detection method. Three-phase original pressing signals of the circuit breaker are respectively acquired through the three-phase signal acquisition channel, and the filtering intensity is dynamically adjusted according to environmental noise through adaptive noise reduction filtering processing, so that the reliability of signal acquisition is improved. The frequency of split-phase pressing actions is counted based on a monitoring time window, dynamic alarm parameters including an alarm time window and a dynamic alarm threshold value are combined, an alarm signal is determined, the dynamic alarm threshold value is adaptively generated through historical pressing parameters and environmental parameters and adapts to different working condition changes, the problems of false alarm and missing alarm of a fixed threshold value are avoided, and the alarm efficiency is improved. And the alarm accuracy and timeliness are improved. According to the method, frequency characteristic parameters are extracted according to the number of times of split-phase pressing actions, fault types such as valve leakage, oil pollution or mechanical wear are automatically identified by analyzing the stability and trend change of frequency characteristics, and accurate support is provided for operation and maintenance decision, so that the fault positioning efficiency and the equipment operation and maintenance intelligent level are comprehensively improved.

The application is a method and system for improving the long-term service safety of solidified petroleum contaminated soil, which performs gradient in-situ treatment according to the distance of petroleum pollution source in the actual pollution scene, determines the position of the petroleum pollution source leakage point, and constructs a pollution concentration gradient distribution model based on the radial distance with the position of the leakage point as the center. The soil of the contaminated site is adjusted to the optimal water content, the soil of different contaminated areas is put into a mixer, different amounts of solidification materials are added according to the pollution grade, and the solidification materials include CaO, FA, NFA and graphene oxide. The petroleum contaminated soil with added solidification materials is compacted and maintained in-situ. In addition, an automatic and intelligent dynamic treatment method is adopted during construction to reduce the physical damage of petroleum pollutants to construction personnel and realize the precise treatment of different pollution level areas, so as to realize the comprehensive effect of harmless long-term performance and mechanical property structure long-term performance of the solidified petroleum contaminated soil.

The invention discloses a method for constructing a biostimulation technical index system of a petroleum polluted site. The method comprises the following steps: constructing a structural framework of the biostimulation technical index system; setting the first-level index as a biological stimulation technology influence factor; setting the secondary indexes to comprise pollutants, microorganisms, required substances and environment; setting the third-level indexes as a plurality of condition indexes and pollutant concentrations; collecting an underground water soil sample of a target area, and carrying out an indoor test based on a microcosm test technology according to site conditions of the target area; drawing a relation curve graph of each condition index and the pollutant concentration; respectively analyzing the incidence relation between each condition index and the pollutant concentration, and determining a key factor influencing biological stimulation and a key microbiological index capable of indicating a biological stimulation process; according to the method, the main control factors in the biological stimulation means can be accurately determined, so that a good biological stimulation scheme can be obtained.

The utility model relates to an auxiliary defoaming and degassing device for oil pollution degree detection, the auxiliary defoaming and degassing device comprises a pressure tank, an inflator pump, a sucking pump, a purification bottle and a conduit, the pressure tank is provided with an inflation port and a suction port, the inflator pump is connected with the inflation port, the sucking pump is connected with the suction port, and the conduit is inserted into the pressure tank; an inflation valve is mounted at the inflation inlet; the extraction opening is provided with an extraction valve; a valve is mounted on the guide pipe; the guide pipe is connected with a sample feeding pipe of an oil pollution degree detector; the auxiliary defoaming and degassing device further comprises a purification bottle; the purification bottle is provided with an opening; the purification bottle is placed in the pressure tank, oil liquid to be detected is injected into the purification bottle, and the guide pipe extends into the purification bottle from an opening of the purification bottle to the bottom of the purification bottle.

The utility model relates to lubricating oil fine filter equipment technical field especially based on lubricating oil pollution degree's gear box on -line fine filter equipment, including filter jar, the top of filter jar is provided with the jar cover, the top edge department of jar cover is provided with the pressure gauge, the top middle department of jar cover is provided with the manual pressure discharge mouth, the inside installation of filter jar has the filter core, the left upper side of filter jar is provided with first connecting pipeline, the outer end of first connecting pipeline is provided with the gear box, the bottom of filter jar is provided with the oil pollution monitor, the downside of filter jar front is provided with the oil pump, is provided with second connecting pipeline between the oil pump and gear box, the right lower side of filter jar is provided with the oil drain pipe, installs solenoid valve on the oil drain pipe, sum up the design to be from, thereby can effectively improve the gear oil cleanliness under the condition of not influencing main oil way lubrication, realizes oil high -efficient recycling, finally reaches the purpose that prolongs equipment life.

The invention relates to the technical field of building construction, in particular to a sliding rail type slip form construction device and a construction method.The sliding rail type slip form construction device comprises a double-guide-rail lifting system and a formwork system which are arranged on the inner side and the outer side of a concrete cylinder wall, the formwork system comprises a steel formwork, first supporting I-shaped steel, an operation platform and a hanging bracket, and the steel formwork is tightly attached to the concrete cylinder wall; the double-guide-rail lifting system comprises a guide rail, a control table and a first lifting machine, the guide rail is arranged in the vertical direction, the bottom of the guide rail is fixed to the concrete cylinder wall, and the two side walls of the guide rail are in a rack shape. The second gear is fixed to the guide shaft and meshed with the first gear, the two third gears are fixed to the guide shaft and meshed with the two racks on the same guide rail respectively, and the control table is electrically connected with the motor. The sliding formwork construction method has the technical effects that oil contamination caused by sliding formwork construction can be solved, and structural safety is improved.

The invention belongs to the technical field of lubricating oil pollution monitoring and analysis, and particularly relates to a lubricating oil pollution state analysis method based on measurement data probability distribution. Comprising the steps of determining lubricating oil pollution factor indexes and a lubricating oil pollution grade set based on corresponding equipment lubricating oil pollution factors and pollution grades; establishing a membership degree matrix of the lubricating oil pollution elements to the lubricating oil pollution state; establishing a fuel oil pollution state change model under each pollution factor through single-factor lubricating oil pollution state monitoring data; a numerical calculation method is adopted to obtain time-varying data of pollution states caused by changes of different lubricating oil elements, and a weight vector is constructed; performing grouping training on an optimization model based on a machine learning method; and substituting a measured value into the model to determine a prediction result. According to the method, more complete data fitting analysis can be carried out based on less original data, and the effective lubricating oil fault analysis method on the basis of lower source data is improved.

The invention discloses a modularized split type intelligent water surface monitoring and processing system and method. Comprising a mobile monitoring unit, a control center and a processing unit, the mobile monitoring unit is used for carrying out hydrological monitoring on a predetermined water area in real time and transmitting the monitoring combination back to the control center; the mobile processing unit is used for receiving the control signal to maintain a predetermined water area; and the control center is used for outputting a control signal according to a monitoring result of the mobile monitoring unit to control the appointed processing unit to go to a preset water area for processing. According to the invention, through the split and modular design of the sensor and the processing equipment, configuration as required and flexible assembly are realized. The same set of system infrastructure can be quickly adapted to multiple scenes such as lake blue-green algae emergency treatment, channel oil stain cleaning, park garbage salvage, wetland water quality dynamic monitoring, drowning personnel rescue and the like by replacing different sensors and processing modules, and the application range of the system is greatly expanded.

The invention provides an efficient hydraulic motor which comprises an oil cylinder, a connector, a crankshaft, a first bearing, a reverser, a connecting rod, a piston, a second bearing, a sliding block, a cam, an oil inlet pipeline, a first high-pressure oil pipeline, a second high-pressure oil pipeline and an oil return module. Wherein a crankshaft is mounted in the oil cylinder through a first bearing and a second bearing, and a connector is arranged at the extending end of the crankshaft; the oil cylinder is provided with an oil inlet pipeline, a first high-pressure oil pipeline, a second high-pressure oil pipeline and an oil return module. The oil cylinder is provided with a connecting rod and a piston, and the sliding block is connected with the reverser and is in contact connection with the outer edge of the cam through a closed structure. The cam is connected with the crankshaft. The efficient hydraulic motor has the advantages of being simple in structure, convenient to use, easy to maintain and low in cost. The motor is small in size and weight and relatively high in power density, solves the problems that a traditional motor is complex in structure, large in noise, poor in low-speed stability and the like, is relatively low in sensitivity to oil pollution, and is more suitable for being used in related industrial scenes.

The utility model relates to the technical field of winch maintenance lifting platforms, in particular to a winch maintenance lifting platform which comprises a base support and a platform body, one end of a lead screw is fixedly provided with a second bevel gear meshed with a first bevel gear, the lead screw is provided with a transmission block connected with the platform body, and the top of the platform body is provided with a guardrail. A lifting structure is arranged on the platform body, one end of the guardrail is provided with an access door, a plurality of moving wheels are installed at the bottom of the base support, a plurality of sliding blocks are installed on the platform body, and sliding rails connected with the sliding blocks are fixedly installed on the two sides of the base support. The mode that a scaffold, a simple elevator or universal lifting equipment is manually built during traditional winch maintenance is changed, the stability can be greatly improved, and the structure has the advantage that the situation of misoperation caused by personnel fatigue when tools and parts are manually carried in a narrow space, aloft work or a dust / greasy dirt environment is avoided.

The application belongs to the field of lubricating oil state monitoring and analysis, and particularly relates to a lubricating oil pollution state prediction method. The method comprises the following steps: obtaining original index data through a lubricating oil state monitoring system, pre-processing the original index data based on time matching or conversion, arranging according to a time sequence, and extracting original characteristic data; creating a projection matrix based on a principal component analysis method; performing projection dimension reduction based on a kernel matrix and the projection matrix to obtain final lubricating oil pollution data samples; establishing a fusion prediction model, establishing a data set, and performing training and optimization until the model prediction accuracy meets the requirements; and using the trained fusion prediction model to predict the lubricating oil pollution state. The application can better retain and fuse a long short-term memory network of time sequence characteristics, so that the prediction result of the model can better fuse hidden characteristics in the whole life cycle of the lubricating oil pollution state, and a better accurate and stable prediction analysis result is obtained.

The application discloses a start-stop control method and a power generation system, and relates to the technical field of carbon dioxide power generation. The method comprises the following steps: implementing an interlock protection control strategy of a power generation system; executing a start-up process of the power generation system; and executing a shutdown process of the power generation system. The power generation system comprises a dry gas seal system, a lubricating oil system, a compressor, a turbine, a generator set, an electro-hydraulic linkage quick closing valve, a detection device and a control system. The dry gas seal system comprises an isolation gas pipeline, a sealing gas pipeline, an isolation gas control valve and a sealing gas control valve. The lubricating oil system comprises a main pump, an auxiliary pump, an emergency pump and an oil pump electric heater. The start-stop control method and the power generation system provided by the application can effectively prevent lubricating oil from entering the dry gas seal system, avoid irreversible damage of the dry gas seal system caused by oil pollution, significantly improve the safety and reliability of the system under high-pressure and high-temperature working conditions, and reduce the probability of unit failure shutdown.

The invention discloses a rainwater pool greasy dirt intercepting device, and relates to the technical field of sewage treatment equipment, the rainwater pool greasy dirt intercepting device comprises a support frame, a collecting tank and an oil guide plate, the support frame is connected with a rainwater pool, the collecting tank is detachably connected with the support frame, the oil guide plate is connected with the support frame, and the oil guide plate is provided with an oil guide surface; the oil guide face obliquely extends into the collecting groove in the water flow direction of the rainwater pool and is provided with an anti-sticking coating so that oil dirt in the rainwater pool can enter the collecting groove along the oil guide face. According to the technical scheme, the oil guide plate with the inclined oil guide surface and the anti-sticking coating is matched with the collecting tank, so that oil stains can be automatically gathered into the collecting tank along the oil guide surface, real-time interception and centralized collection of the oil stains in the rainwater pool are realized, oil stain diffusion and water body pollution are reduced from the source, the subsequent treatment cost and potential safety hazards are reduced, and the service life of the rainwater pool is prolonged. Meanwhile, the device is simple in structure, convenient to install and capable of effectively improving the oil stain cleaning efficiency and reducing the manual labor intensity.

The invention provides brassinobacter sp. As well as a screening method and application thereof, and belongs to the technical field of petroleum pollution microbial remediation. The preservation number of the Caulobacter sp.WS1 provided by the invention is CGMCC No.29936, the Caulobacter enriches the resources of microbial strains, the crude oil degradation efficiency of the strain is 40.9%, the degradation rate of short-chain alkane C10-C17 is as high as 90.5%, the degradation rate of long-chain alkane C18-C30 is as high as 84.9%, and the Caulobacter sp.WS1 has extremely high application potential in the field of petroleum pollution remediation.

The utility model relates to the technical field of smoke prevention and exhaust devices, and discloses a smoke prevention and exhaust device for fire engineering, which comprises an exhaust pipe, a fixed cover is fixedly mounted at the top of the exhaust pipe, a shell is arranged in the fixed cover, and a fixed block is fixedly mounted at the top of the shell. Dust in smoke can be effectively blocked through the filter screens installed at the two ends of the shell, so that the draught fan is prevented from being damaged, the control block is pushed towards the left side of the movable groove, the control block can drive the fixing block to enable the shell to move towards the left side, then the limiting block is pulled up, the shell can be directly separated from the fixing cover, and the fan is prevented from being damaged. After the shell is moved out of the fixed cover, a second spring can push a stop block, and a clamping block moves outwards, so that the connecting cover and the filter screen at the two ends of the shell can be directly taken out from the shell, and the filter screen can be quickly disassembled and is convenient to clean and maintain; the problem that the bolts are difficult to disassemble and assemble after the filter screen is fixed by conventional bolts due to dust and greasy dirt erosion is avoided.

The utility model relates to the technical field of ventilation caps, and discloses a special ventilation cap for a speed reducer, which comprises a hollow cylinder, a first connecting column is fixedly connected to the left side of the bottom of the hollow cylinder, a sealing ring is fixedly connected to the bottom of the outer wall of the first connecting column, and a threaded groove is formed in the inner wall of the first connecting column. The left end of the bottom of the inner side of the hollow cylinder is fixedly connected with an anti-backflow pipe, the right side of the top of the hollow cylinder is fixedly connected with a second connecting column, the top of the second connecting column is rotationally connected with a cap, a plurality of air holes are formed in the periphery of the bottom of the cap at equal intervals, and a supporting mechanism is arranged on the outer wall of the hollow cylinder. According to the anti-backflow device, the sealing ring is tightly attached to the installation portion and is in threaded connection with the connector of the speed reducer in cooperation with the threaded groove, the anti-backflow pipe controls gas to flow in and out when pressure changes, impurities and oil are prevented from flowing back, and leakage of the oil in the speed reducer is effectively prevented, oil pollution is avoided, and the internal pressure is balanced.