244results about How to "Cause safety hazard" patented technology

The invention discloses a tensile reinforcement concrete spray body supporting method for a deep soft roadway. The method includes preliminarily spraying a first layer of concrete on a surrounding rock of the roadway after blasting and punching a hole to mount a primary supporting anchor rod; hanging two layers of reinforcement screens on a head of the reserved primary supporting anchor rod; secondarily spraying concrete on the roadway after the screens are hung on the roadway, punching a hole to mount a secondary supporting anchor rod after secondary concrete spraying, and leading the secondary supporting anchor rod and the primary supporting anchor rod to be in quincunx staggered arrangement; and finally spraying concrete for the third time to cover an exposed portion of the secondary supporting anchor rod. On the basis of sufficiently researching and analyzing breakage forms and mechanisms of the roadway with the broken surrounding rock, tensile reinforcement concrete spray body supporting technology is provided. Repeated practices in fields prove that the technology effectively increases supporting strength of the roadway, and the difficulty about supporting of the deep soft roadway is resolved.

The invention discloses an evaluation pre-warning system for regional power grid voltage reactive power control. The evaluation pre-warning system comprises a CIM (communication information model) analysis module, an E (E format) file analysis module, an AVC (automatic voltage control) running record data synchronization module, a database, an inquiry display module, a reactive power voltage safety analysis module, a district analysis module, an AVC operation analysis module and an AVC instruction correctness analysis module. Power grid topological data, power grid running data and AVC running data are stored in the database of the system, reactive power voltage safety analysis, district analysis, AVC equipment operation condition analysis and AVC instruction correctness verification are executed by reading the data in the database, and results are stored into the database of the system; finally inquiry displaying is implemented, so that AVC systems, part of which are to be put into operation and part of which are put into operation, can be comprehensively detected, analyzed, counted and pre-warned, so that the potential safety hazard caused by the operation of the AVC systems to a power grid can be avoided, and an active promotion effect on scheduling of the power grid can be achieved.

The present invention relates to the field of mechanical property testing of concrete, and discloses a method for testing bond strength of the concrete and coal, rock or concrete, the method comprises the steps of in situ drilling of a specimen to be bonded, production and conservation of the specimen to be bonded, anchoring of the specimen, mounting of the specimen, opposite-pulling, reading and calculation of the bond strength; the present invention also discloses an experiment member for testing the bond strength of the concrete and the coal, rock or concrete, the experiment member comprises two bonding cylinders and two pulling rods, one ends of the bonding cylinders are provided with threaded holes, one ends of the pulling rods are provided with external threads, the bonding cylinders and the pulling rods are threaded in connection, and the bonding cylinders respectively sleeve both ends of the specimen to be tested. The experiment method and the experiment member can simply and quickly directly measure the bond strength of the concrete and a spray object.

The invention discloses a punching device for paperboard, belongs to the technical field of paper punching devices and aims to solve the problem that waste chips generated when the paperboard is punched in an existing way cannot be completely separated from the paperboard. The punching device comprises a workbench, wherein a plurality of receding holes penetrate through the workbench, and a plurality of punching needles are arranged above the workbench; a reinforcing rib is arranged at the lower end of any punching needle; a sleeve is arranged in any receding hole; spiral guide grooves matchedwith the reinforcing ribs are formed in the inner wall of the sleeves in the height direction; the upper ends of the sleeves extend out of the receding holes to be connected with a plurality of blades; a storage groove is formed in the middle of each receding hole; positioning blocks are symmetrically connected to the outer wall of the sleeves; positioning columns are arranged on two sides of anypositioning block, and the positioning columns are sleeved with torsion springs; one end of each torsion spring is connected with the corresponding positioning block, and the other end of each torsion spring is connected with the inner wall of the corresponding storage groove; and a plurality of chip removal grooves penetrate through the periphery of any receding hole.

The invention provides an impeller rotating speed measuring method for a wind generating set. The impeller rotating speed measuring method includes the following steps that A, equal-frequency-domain pulse signals are generated in the impeller rotating process of the wind generating set; B, the equal-frequency-domain pulse signals generated in the step A in one rotating speed cycle are collected, the collected equal-frequency-domain pulse signals are subjected to filtering treatment, nose pulses with the frequency domain widths not meeting requirements are filtered out, effective equal-frequency pulse signals are reserved, and the number of the effective equal-frequency pulse signals is calculated; and C, the impeller rotating speed value of the wind generating set is calculated according to the number of the effective equal-frequency-domain pulse signals, obtained in one rotating speed cycle, in the step B. The invention further provides an impeller rotating speed measuring system for the wind generating set, the impeller rotating speed measuring system comprises a pulse generation device, a pulse collecting device, a pulse counting device, a frequency conversion device and a rotating speed conversion device, all of which are sequentially connected. By means of the impeller rotating speed measuring method and system for the wind generating set, the measuring precision is high, stability is good, and the defects of stall and biased rotating speeds during existing impeller rotating speed measuring are overcome.

The invention discloses a routine inspection device and method for rigid cage guides. The routine inspection device comprises a moving component, a transmission component, a driving component, a guiding component and an outer shell, wherein the moving component, the transmission component, the driving component, the guiding component and the outer shell are arranged on a main body base plate. The driving component comprises an inclinometer and a pressure sensor, wherein the inclinometer and the pressure sensor are connected with a single chip microcomputer; the single chip microcomputer is connected with a driver; the driver is connected with brushless direct-current motors; and an output shaft of each brushless direct-current motor is provided with an optical-electricity encoder connected with the driver. The moving component comprises driving output shafts and driven output shafts; wheel flanges on the driving output shafts and wheel flanges on the driven output shafts are connected with wheel hubs; permanent magnets are arranged in the wheel hubs; and a rubber surface layer is arranged outside each wheel hub. The transmission component comprises worms, worm wheels, synchronous belt pulleys and synchronous belts, wherein each worm is connected with the output shaft of the corresponding brushless direct-current motor; each worm wheel is arranged on the corresponding driving output shaft and engaged with the corresponding worm; the synchronous belt pulleys are arranged on the driving output shafts and the driven output shafts; and the synchronous belts are wound on the synchronous belt pulleys. The guiding component comprises guiding wheels. By means of the routine inspection device and method for the rigid cage guides, rigid cage guide inspection speed is increased, and production efficiency of a coal mine enterprise is improved indirectly.

The invention discloses an obstacle removing device of a transmission line, includes an upper mounting plate, a lower mounting plate, a first guide seat, a second guide seat, an upper pneumatic lever,a lower pneumatic lever, a drive wheel mounting lever, a drive wheel, a belt, a first motor, an outer tube, an inner tube, a first spring, a driven wheel, an L-shaped lever, a sweeping wheel, a second spring, a first hydraulic cylinder, a second hydraulic cylinder, a barrier clearing roller, a collecting device and a viewing device; The utility model has the advantages of reasonable and simple structure, low production cost and convenient installation, and can effectively carry out barrier-clearing treatment on the transmission line by setting the barrier-clearing roller and the cleaning wheel, and has high cleaning efficiency, thereby solving the difficult problems in the background technology; and the utility model has the advantages of simple structure, low production cost and convenient installation. The invention is provided with a collecting device, which can collect the sundries on the cleaned transmission line to prevent the sundries from falling down and cause the hidden danger to the personnel. The invention also provides a viewing device, which can remotely view the working process, and the camera angle on the viewing device can be arbitrarily adjusted.

The invention relates to a fire rescue hexrcopter for an aerial electric power line. The fire rescue hexrcopter for the aerial electric power line comprises an unmanned aerial vehicle body, supporting posts, a connecting disc, a delta parallel mechanism and a fire extinguishing device. The number of the supporting posts is four, the supporting posts are located at four vertices of the fire extinguishing device correspondingly, the bottom ends of the supporting posts are connected with the fire extinguishing device, and the top ends of the supporting posts are connected with the connecting disc. The delta parallel mechanism is located between the connecting disc and the unmanned aerial vehicle body, the lower end of the delta parallel mechanism is connected with the upper end face of the connecting disc, and the upper end of the delta parallel mechanism is connected with the unmanned aerial vehicle body. The fire rescue hexrcopter for the aerial electric power line can be used for carrying out high-altitude fire protection and fire extinguishing operation when the aerial electric power line is on fire, and is high in automation degree, steady and flexible in flying during fire extinguishing, wide in fire extinguishing spraying range, high in fire extinguishing efficiency and high in safety, and the problem that the dangerousness of manual fire protection and fire extinguishing for the aerial electric power line is high is solved.

The invention relates to an information prompting method and device. The method comprises the internal temperature of an intelligent socket is obtained; the internal temperature of the intelligent socket is compared with a preset temperature threshold, and whether power of power utilization equipment connected to the intelligent socket is beyond an acceptable power range of the intelligent socket is determined according to a comparison result; if yes, alarming information against too high power of the power utilization equipment is generated; and the alarming information is pushed to a mobile terminal bound to the intelligent socket. The information prompting method and device can be used to avoid hidden safety hazards caused by too high power of the power utilization equipment as well as prevent the intelligent socket from shortening of the service life due to too high power of the power utilization equipment.

The invention discloses an unmanned aerial vehicle pneumatic launching device, which comprises a base, a launching trolley, a launching tube, and an air storage tank. The launch trolley is connected, the front end of the launch tube is provided with a locking mechanism, and the rear end is provided with a pressure sensor; the rear end of the base is provided with a controller, and the controller is connected with the pressure sensor, locking mechanism and solenoid valve; the launch trolley passes through The pulley is installed in the chute on the base; the front end of the upper surface of the base is provided with a buffer device; the front end of the base is higher than the rear end, and a tripod with a lifting rod is arranged at the front end of the base. The launch angle of the UAV is adjusted by the tripod, the control system controls the air storage tank to inflate the launch tube, and the launch car advances along the base to drive the UAV to launch, and the buffer device blocks the launch car and stops it. The invention improves the safety and reliability of launch.

The invention discloses a wall surface painting device adapting to different wall surfaces. The wall surface painting device adapting to the different wall surfaces includes a box body. A long plate is fixedly connected between two sides of the inner wall of the box body, two sides of the top of the long plate are fixedly connected with support plates, and one sides of the support plates are connected with rotary rods in a rotating mode. One ends the rotary rods penetrate through the support plates and the box body in sequence and extends to one side of the box body. The bottom of the inner wall of the box body is fixedly connected with a painting box, and the bottom of the inner wall of the painting box is fixedly connected with a material suction pump. A discharge port of the material suction pump communicates with a first discharge pipe. The invention relates to the technical field of painting. The wall surface painting device adapting to the different wall surfaces can paint automatically through the rolling of a rolling brush, and can spray and paint at the same time, the situation that the painting is caked rapidly in extreme weather can be effectively avoided, the quality ofthe wall surface painting is improved, the speed of the painting can be greatly improved by using double rolling wheels, the work efficiency is improved, the labor time of painting is reduced, and the painting efficiency is improved.

The invention discloses a self-reinforced anti-seepage outer wall, and belongs to the field of buildings. The self-reinforced anti-seepage outer wall comprises two waterproof layers and a concrete layer fixedly poured between the two waterproof layers. After self-solidification balls embedded in the concrete layer are used for a long time, the waterproofness of the outer wall is reduced, and at the moment, the outer wall is gradually degraded; when water seepage occurs, water vapor gradually enters a hollow through rod to gradually dissolve water-soluble columns, so that the limiting effect ofthe water-soluble columns on an elastic film is gradually weakened, at the moment, the elastic film is extruded and broken under the extrusion effect of water in a water storage self-expansion layer,and the remaining water-soluble columns are added and dissolved; and meanwhile, after the water-soluble columns are dissolved, the two ends of the hollow through rod are through, so that water makescontact with lime powder and solidifies the lime powder, the effect of fixed-point strength compensation of the water seepage position is achieved, the overall strength of the outer wall is effectively improved, large potential safety hazards caused by water seepage of the outer wall are not prone to happening, and safety is improved.

The invention relates to a high-performance current transformer intelligent analyzer, which is applied to a saturation characteristic test for a transient state current transformer, direct tests for a sleeve current transformer and a current transformer in GIS and all parameter tests for all conventional transformers, and belongs to the technical field of current transformer test instruments. During voltage current characteristic tests for the transient state current transformer and a conventional high saturation characteristic transformer, because only the output frequency needs to be changed during the tests, the intelligent analyzer can perform the test on the transient state current transformer of which the saturation voltage is 15,000 kilovolts when the maximum amplitude value is 120 volts, and change the blank that at present no domestic equipment performs test on a transient sate winding; besides, the instrument output test voltage is low, which cannot cause potential safety hazards to the equipment and the personal safety; and because a booster transformer (generally, the weight of a transformer is tens of kilograms) for boosting is not needed, the weight of equipment to be tested is greatly reduced.