61results about How to "Endanger personal safety" patented technology

The invention discloses a nuclear reactor internal component surface roughness assessment method based on a convolutional neural network. The method comprises the following steps of S1, collecting video data; S2, obtaining image data; S3, dividing the image data into a training data set and a test data set; S4, inputting the training data set into the convolutional neural network for training, obtaining a feature identification model and outputting initial identification features; S5, classifying the initial identification features according to roughness, thereby obtaining roughness levels; S6, inputting the test data set into the feature identification model for test, and outputting secondary identification features; S7, judging whether the secondary identification features are consistentwith the roughness levels or not; and S8, displaying the roughness levels on a human-computer interaction interface. According to the method, the problem that in the prior art, the manpower investment is high and the efficiency is low due to artificial detection and assessment, and the material surface roughness detection and assessment timeliness and continuity requirements cannot be ensured issolved.

The invention relates to a scraper shovel loading control system and method and a scraper. The control system comprises a material pile position detection module (10) used for detecting the position of the scraper relative to a material pile (3), an operation state detection module used for detecting the operation state of an actuating mechanism in the shovel loading operation process of the scraper, and a control part (60) capable of controlling at least one of a big arm (1) and a scraper pan (2) to move so that automatic material shovel loading can be achieved according to feedback signals of the operation state detection module after judging that the scraper pan (2) arrives at the material pile (3) according to feedback signals of the material pile position detection module (10). In theshovel loading control mode, through automatic material shovel loading, the material shovel loading efficiency can be improved, manual operation is simplified, time is saved, movement of the scraperis optimized, operation is stable, and the reliability is high; and especially when the operation environment of the scraper is harsh, life health and personal safety of drivers can be prevented frombeing endangered by dangerous and harmful factors.

The invention provides a magnetofluid polished rod sealer used for oil production in an oil field, comprising a housing; the lower end of the housing is enclosed, the upper end is provided with gram and a gland bush and the gland bush is sheathed on the outside of a polished rod; particularly, a magnetic sleeve gasket is arranged in the housing, the inner ring surface of the magnetic sleeve gasket is provided with a fill area opposite to the polished rod and the fill area is filled with magnetofluid; the upper end and the lower end of the magnetic sleeve gasket are respectively provides with an upper sleeve gasket and a lower sleeve gasket. The invention completely solves the long-standing problems of high power consumption, vulnerableness, 'running', 'emitting', 'dropping' and 'leaking' of oil-gas-water and harm on safety and environment protection of the existing oil producing sealer and the like; the sealer can be widely used for sucker-rod pumping wells in the oil field.

The invention discloses an anti-explosion main junction box for a high-voltage compact motor, comprising a box base and a box cover. The box base is detachably and hermetically connected with a motor body; the box cover is detachably and hermetically connected with the box base; a junction post is arranged in the box base; a pressure release hole is arranged on the lower part of the box base; the box base is provided with a hollow pressing plate inside the pressure release hole; two layers of hollow sealing cushions are arranged between the pressing plate and the box base; a layer of pressure release film is arranged between the two layers of sealing cushions; and the box base is provided with a protection cover having an opening outside the pressure release hole. With simple structure, easy installation manufacture and novel valving design, compared with the traditional junction box, the invention greatly improves the security and has the characteristics of reasonable electric gap, creepage distance and shell intensity, more convenient installation and use, high reliability, convenient use, compact structure and attractive appearance.

The invention relates to the field of bridge construction, in particular to a pre-pressing method for a bridge bracket. The method comprises the following steps of calculating the loading positions and quantity of pre-pressing blocks according to the area of a pre-pressing surface of the bracket, and determining observation points for observing the elastic deformation condition of the bracket during loading; placing the pre-pressing blocks on the pre-pressing surface of the bracket according to a calculation result, symmetrically loading the pre-pressing blocks from the center line of the bracket to the two sides of the bracket, and keeping the loading rate consistent; conducting stage-by-stage loading on the pre-pressing surface of the bracket, after one stage of loading is completed, calculating numerical values of all the observation points, when loading is conducted on the last stage, conducting static pressure observation for 4 h or above, and then calculating the numerical valuesof all the observation points; after two measurement results before and after the last stage of loading are stable, symmetrically unloading the pre-pressing blocks stage by stage, after each stage ofunloading is completed, recording the numerical values of all the observation points, and comparing the numerical values with loading records. Therefore, pre-pressing data of the bracket is acquiredquickly and accurately, the bearing capacity and stability of the structure are detected, and preparation is made for subsequently adjusting the bracket.

The invention relates to an anti-theft distribution box for lithium battery processing detection. The anti-theft distribution box comprises a distribution main cabin, a horizontal substrate and an adsorptive groove; an auxiliary handle is fixed at the top end of the distribution main cabin, and a radiating fan is fixed at the upper end of the inner side of the distribution main cabin; the upper end of the radiating fan is connected with a temperature sensor, and a voltmeter is fixed below the radiating fan; the horizontal substrate is arranged at the bottom of the voltmeter, and sliding railsare fixed at the left end and the right end of the horizontal substrate; and the adsorptive groove is arranged at the bottom end of the inner side of the distribution main cabin, and a roller is fixedat the bottom of the outer side of the distribution main cabin. The anti-theft distribution box for the lithium battery processing detection disclosed by the invention has the advantages as follows:through the arrangement of the transverse plate, the opened vertical plate and an anti-theft lock, the right end of a transverse plate is penetrated by an opened vertical plate, a connecting hole is formed at the front end of the opened vertical plate, the anti-theft lock can enable the device to possess the anti-theft function by penetrating the connecting hole, and the condition that the normaloperation of the whole circuit is influenced since the voltmeter is stolen is avoided.

The invention belongs to the technical field of glass curtain walls and particularly discloses a device for cleaning a glass curtain wall. The device comprises a base and a cleaning mechanism, the cleaning mechanism comprises a reciprocating lead screw and a motor with an output shaft, the bottom end of the reciprocating lead screw is rotationally connected with the top end of the base, the motoris fixed to the top end of the base, the reciprocating lead screw is in transmission connection with the output shaft of the motor through a belt, a first sliding block is in threaded connection withthe reciprocating lead screw, a brush plate is arranged on the first sliding block, and bristles are arranged on the brush plate. According to the invention, the first sliding block on the reciprocating lead screw drives the bristles on the brush plate to continuously brush a glass curtain wall, compared with a manual glass curtain wall cleaning mode, the device has the advantages that the glass curtain wall cleaning speed is higher, more time is saved, and consumed manual labor is little.

A special integrated cable for welding machine features that wear-resisting sleeve, rubber sleeve, high-voltage heat-shrinkable pipe and connecting protection unit are installed at both ends of the cable, and the wear-resisting sleeve is provided with a plurality of sleeves respectively wrapped on the outside of control wire, conductor wire and trachea. The abrasion-resistant sleeve and the protective sleeve are wound and connected through an insulating adhesive tape; Rubber sheath is covered with insulating tape; The outer sleeve of the rubber sleeve is provided with a high-pressure heat shrinkable pipe; The connection protection unit comprises an abrasion-resistant joint and a limit spring, wherein one end of the abrasion-resistant joint is fitted and sleeved on the exterior of the high-voltage heat shrinkage pipe, and the other end is embedded with a limit spring for limiting the bending degree of the integral cable. The integrated cable not only realizes the three-wire-in-one function of the traditional welding machine cable, Moreover, the connector of cable, wire feeder and welding machine can be disassembled quickly, which prevents the cable connector from rubbing against thewire feeder and welding machine, and prevents the signal interruption and even gas leakage caused by excessive bending of cable, thus realizing the advantages of convenient, quick and automatic operation of integrated cable, and high safety performance.

The invention provides an escape protection device, system and method and a wind generating set. The escape protection device is used for the wind generating set and can be connected with a suspensionpart installed on the wind generating set through a sling. The escape protection device comprises a bearing main body, a sling connecting part and a magnetic adsorption part; the bearing main body isprovided with a back plate and a supporting structure, and the supporting structure is arranged on the back plate and defines a supporting space together with the back plate so as to support escape people and objects; the sling connecting part is arranged on the bearing main body so that the bearing main body can be connected to the sling through the sling connecting part; and the magnetic adsorption part is arranged on the side, away from the supporting space, of the bearing main body so that the bearing main body can be attracted to a tower barrel of the wind generating set through the magnetic adsorption part. According to the device, system and method and the wind generating set, the problem that the escape person is prone to swing or even collide the tower barrel due to influence ofthe wind power in the process of landing on the floor from a cabin of the wind generating set can be solved, and then the one or multiple of the purposes of ensuring the personal safety of the escapepersonnel, prolonging the service life of the escape device and improving the reliability of the escape device can be achieved.

The invention discloses a cantilever type bar storage frame, belongs to the technical field of storage frames and aims at solving the technical problems that in the prior art, when round and tubular sectional materials are stored, limiting and fixing cannot be achieved, material slipping is likely to be caused, potential safety hazards are caused, the structure cannot be dismounted or mounted according to actual usage, and waste of plant work space is likely to be caused. According to the adopted technical scheme, a plurality of stand columns are arranged on a base, a plurality of clamping grooves are symmetrically formed in the two sides of each stand column, and a cantilever support is fixedly arranged in each clamping groove; each cantilever support is provided with a limiting stop block, wherein a groove I matched with the limiting stop block is formed in the center position of the top of the cantilever support, and the bottom of the limiting stop block is arranged in the groove I; a through hole I is formed in the outer side center position of the bottom of each limiting stop block, through holes II coaxially matched with the through hole I are symmetrically formed in the outer side face of each cantilever support, and each limiting stop block and the corresponding cantilever support are fixedly connected in the manner that a bolt penetrates the corresponding through hole I and the corresponding through holes II.

An integrated safe storage device for flammable and volatile chemical reagents comprises an outer shell and a magnetic fixation magnet. An inner shell is arranged in the outer shell, thermal insulation cotton is arranged between the outer shell and the inner shell, and the tops of the outer shell and the inner shell are arranged to be open. A cover plate is connected to the top of the inner shellin a threaded manner, a screwing rod is vertically fixed to the middle of the cover plate in a penetrating and inserted manner, the transverse section of the screwing rod is rectangular, the top and the bottom of the screwing rod penetrate out of the cover plate, and round rods are symmetrically arranged at the top of the screwing rod with the vertical center line of the screwing rod as a symmetric line. The integrated safe storage device is controlled by a controller, when it is needed to inject the chemical reagents into an upper cavity and a lower cavity, a first electromagnetic valve makesa first round tube communicate with a second round tube, the chemical reagents are injected into the upper cavity and the lower cavity through the first round tube, and a cooling mechanism can continuously cool the chemical reagents in the upper cavity and the lower cavity cyclically to prevent volatilization. The integrated safe storage device can only be normally opened through the magnetic fixation magnet, and it is effectively prevented that the illegal use by irrelevant personnel endangers the personal safety of other people.

The invention discloses a battery box, comprising a battery box body, wherein the surface of the battery box body is provided with an air guide groove, and a dust net is installed on the inner wall ofthe battery box body opposite to the air guide groove; An inclined drainage groove is arranged below the dust-proof net at the bottom of the inner side of the battery box body, one end of the drainage groove is communicated with an inlet water pipe, one end of the inlet water pipe far away from the drainage groove is inserted into the water storage chamber, and a water outlet is arranged below the front side of the battery box body. An insulating frame plate is arranged in the middle of the battery box body, insulating support rods are arranged at the intervals between the two sides of the insulating frame plate and the battery box body, a battery slot frame is arranged on the inner side of the insulating frame plate, and a plurality of damping springs are arranged between the insulatingframe plate and the battery slot frame. The battery box has the advantages of good heat dissipation performance, no water inflow and humidity, good shock absorption performance, and the battery is noteasy to shake.

The invention discloses a stone grinding processing device. The stone grinding processing device comprises a grinding bin, a support, a partition plate, a guide rail, a grinding disc, a workbench, a draught fan and a dirt discharging pool. The grinding bin is arranged in a sealed manner. The support is arranged above the grinding bin. Hydraulic rods are arranged on the two sides above the support and connected with hydraulic cylinders. The hydraulic cylinders are located on the outer side of the top of the grinding disc and connected with corresponding hydraulic systems and hydraulic stations. The partition plate is arranged below the support in a sealed manner and provided with the guide rail. A rotating shaft penetrates through the guide rail. A motor is arranged at the bottom of the support and is in drive connection with the rotating shaft, and the grinding disc is arranged at the bottom end of the rotating shaft. An installing end face is arranged on the top of the grinding disc and is in a disc shape, a conical groove is formed below the installing end face, an installing hole is formed in the center position of the installing end face, and a key groove is formed in the installing hole. According to the stone grinding processing device, blockage cannot be caused, the grinding effect is good, adjusting is convenient, the dust removing effect is good, the work efficiency is high, and the production cost is low.

The invention provides a bus shelter and assemblies and relates to the technical field of public facilities. The bus shelter comprises a shelter body, an air conditioner, a blind road, an anti-theft warning device and a power supply device, wherein the shelter body is of a closed structure, and an emergency door for people to come in and go out of the shelter body is arranged on a side wall of theshelter body; one side of the shelter body close to a lane is provided with an anti-collision column; the air conditioner, the anti-theft warning device and the blind road are arranged inside the shelter body, and both the air conditioner and the anti-theft warning device are electrically connected with the power supply device; the anti-theft warning device comprises a controller, a key and an alarm; the controller is separately connected with the key and the alarm; and when the key is pressed, the controller controls the alarm to be started. By arranging the air conditioner, the internal temperature of the shelter body can be adjusted, thereby providing a comfortable waiting environment for passengers in the shelter body, preventing the shelter body from being influenced by the ambient environment, and reducing the condition of sunstroke or frostbite of the passengers waiting for buses for a long time.

The invention relates to the technical field of electricity meters, in particular to an electric meter with an electric leakage prompting function, which comprises an electric meter body, a down lamp, a connecting wire and an electric leakage sensor, and is characterized in that a display panel is embedded in the front surface of the electric meter body, upper fixing plates are welded on two sides of the electric meter body, and lower fixing plates are mounted below the upper fixing plates; the down lamp is arranged below the display panel, and the down lamp is connected with the electric meter body through embedding. According to the electric meter, through the arrangement of the electric leakage sensor, the down lamp and the control chip, when an electric leakage phenomenon occurs in the electrifying process, after the electric leakage sensor detects the occurrence of the electric leakage phenomenon, the electric leakage sensor can feed back a signal to the control chip, then the control chip enables the down lamp to emit light after being powered on through the power distribution module, the electric meter prompts the electric leakage phenomenon in time by means of the light, and the situation that the electric leakage phenomenon endangers the personal safety of a human body is effectively avoided.

The invention discloses a CNN (convolutional neural network)-based method for monitoring internal component surface of a nuclear pile. The method comprises the following steps: S1, acquiring video data of the internal component surface of the nuclear pile; S2, obtaining image data; S3, dividing the image data into a training dataset and a testing dataset; S4, inputting the training dataset into aCNN for training to obtain a feature recognition model and output primary recognition features; S5, classifying the primary recognition features according to known corrosion features to obtain a corrosion type; S6, inputting the testing dataset into the feature recognition model for testing to output secondary recognition features; S7, judging whether the secondary recognition features accord withthe corrosion type; S8, displaying the corrosion type on a human-computer interaction interface of a monitoring and early warning module. The method solves the problems that labor input is large andefficiency is low due to manual monitoring and requirements for timeliness and continuity of material surface corrosion monitoring cannot be met in the prior art.

The invention relates to a material conveying and material dividing device of a belt conveyor. The material conveying and material dividing device comprises a rack and guide wheels arranged on the rack; a conveying belt is arranged on the guide wheels; a fixed pulley is arranged above the rack; a material divider is arranged in the conveying belt; one end, in the shape of an isosceles triangle, of the material divider faces the input direction of the conveying belt, and the rectangular end of the material divider faces the output direction of the conveying belt; two rectangular side edges of the material divider are respectively connected with one end of a link arm; a counterweight box and a lug are arranged on the link arms; one end of a steel wire rope is connected with the lug, and the other end of the steel wire rope passes through the fixed pulley to be connected with a pedal; the pedal is fixedly arranged on the rack. According to the material conveying and material dividing device disclosed by the invention, the phenomenon that the conveying belt is damaged due to the fact that the conveying belt is blocked by impurities is avoided; when the conveying belt is blocked by impurities, the impurities can also be easily taken out, so equipment is fast to recover and safe, and has no factors of endangering personal safety of personnel; meanwhile, the workload and the labor strength of the personnel are greatly reduced; the material dividing effect of the material conveying and material dividing device is ideal; lime can be fully buried for protection to prevent dust from being raised, so that the sintering production environment is improved.

The invention discloses a natural gas pipeline sampling valve. The valve comprises a baffle, a connecting frame, a sampler and a purification box, the purification box is located at the lower end of the baffle and fixedly connected with the baffle, the connecting frame is located on the inner surface of the baffle and fixedly connected with the baffle, the sampler is located in the baffle and comprises a first sampling pipe, a second sampling pipe, a first piston and a second piston, the first piston is located in the first sampling pipe, the second piston is located in the second sampling pipe, the lower ends of the first piston and the second piston are fixedly connected with rubber plates, and the outer circular surfaces of the rubber plates are closely attached to the inner wall of the first sampling pipe. The valve has the advantages that the natural gas sampling accuracy of the sampler is guaranteed, the natural gas sampling efficiency is further guaranteed, the risk of external influence during sampling is reduced, the sampling stability of detection personnel is guaranteed, and the accuracy of a detection result is guaranteed.

The invention relates to the technical field of auxiliary production equipment for the water supply department, in particular to a hot air curtain assisted evaporation system, comprising a hot air curtain unit, a temperature control system, a neutralizing device and a chlorination system; the neutralizing device is provided with a chlorine probe and a control system, an air outlet of the hot air curtain machine is provided with a master pipeline provided with a plurality of auxiliary pipeline groups, the auxiliary pipelines are as many as chlorine cylinders arranged in the chlorination system, each auxiliary pipeline is arranged on one side of the corresponding chlorine cylinder, each auxiliary pipeline is provided with an exhaust port facing a bottle body of the chlorine bottle; the temperature control system and a control system of a neutralizing device are electrically connected to a hot air fan. The ambient temperature of a chlorination system is detected via the temperature control system, working condition of the hot air curtain machine is controlled in real time, sufficient temperature compensation is provided for gasifying liquid chlorine, and normal running of the chlorination system is ensured.

The invention provides a driving behavior evaluation information display method, device and system, and the method comprises the steps: displaying a virtual scene where a current vehicle is located onan interface, and displaying the virtual vehicle in the virtual scene; acquiring driving parameters of the vehicle in real time; obtaining evaluation information according to the driving parameters;and displaying the evaluation information on a virtual vehicle on an interface. The method is convenient for a driver to more intuitively know the driving condition according to the evaluation information on the interface and guide the driver to drive safely.

The invention discloses a jaw breaker for concrete production. The jaw breaker for concrete production comprises a machine frame. A first edge plate is fixedly connected with the side wall of the machine frame, a conical channel is formed between the first edge plate and a second edge plate, and a fixed jaw plate is fixedly connected with the side wall of the first edge plate. A flywheel is connected with the side wall of the machine frame in a rotating mode, and an output shaft of the flywheel penetrates through the outer wall of the machine frame and is connected with the second edge plate in a rotating mode. According to the jaw breaker for concrete production, a detachable movable jaw is adopted, and therefore a new jaw plate can be conveniently replaced when the movable jaw is worn; due to the fact that an adjusting mechanism is arranged, the included angle between the fixed jaw plate and the movable jaw can be reduced according to the usage requirement, the requirement that the included angle between the fixed jaw plate and the movable jaw is smaller than the double friction angles can be met, and the material return phenomenon is eliminated; and due to the fact that a hooking claw is arranged, the hooking claw can turn over materials in the conical channel, the materials can be more easily broken, and the hooking claw can also avoid the phenomenon that the materials flyout of a feeding inlet to endanger the personal safety of an operator.

The invention relates to the technical field of chemical wastewater, in particular to a harmless treatment system and method for chemical wastewater. The harmless treatment system for the chemical wastewater comprises a bottom rack, a supporting frame, a filtering mechanism, a communicating pipe and a secondary treatment mechanism. According to the invention, a rotating rocker is matched with a fixed pulley through a traction rope to drive a collecting plate, so that filtered sundries can be upwards pulled and lifted, and a worker does not need to enter the device to clean the sundries. In a stimulation treatment mechanism, rotating blades are used for cleaning the chemical wastewater again through the mutual cooperation of a cleaning net and a disinfectant. In cleaning branch chains, a cleaning rack drives a brush to clean sundries on a filter screen through mutual cooperation of a tensioning spring rod and a cleaning plate, and the situation that the sundries block the filter screen and affect the filtering efficiency of the chemical wastewater is avoided.

The invention relates to the technical field of electromagnetic lock control, particularly provides an electromagnetic lock unlocking circuit and clothes processing equipment, and aims to solve the technical problem of how to unlock an electromagnetic lock locked on a door body in the clothes processing equipment under the condition that the clothes processing equipment or a power grid connected with the clothes processing equipment breaks down. In order to achieve the purpose, the unlocking circuit is provided with a switching power supply, a switch control circuit and a charging and discharging circuit, and when a control power supply of the electromagnetic lock is powered off, the switching power supply outputs electric energy to the electromagnetic lock control circuit through the switch control circuit, so that the electromagnetic lock control circuit unlocks the electromagnetic lock after being powered on; therefore, automatic unlocking of the electromagnetic lock is realized when the control power supply is switched off and the electromagnetic lock is in a locked state. Meanwhile, the switch control circuit can transmit the electric energy output by the switch power supply to the electromagnetic lock control circuit under the discharge control of the charge and discharge circuit, and the delay time for unlocking the electromagnetic lock is adjusted by adjusting the discharge time of the charge and discharge circuit.

The invention discloses a shield tunnel pipeline support connecting device and an anti-falling device in an earthquake high-intensity area. The connecting device comprises a shield segment; and reserved bolt hole embedded parts are arranged at the positions, corresponding to pipeline supports, of the shield segment. The anti-falling device is arranged on the shield segment and additionally provided with an embedded plate; the embedded plate is arranged in the middles of the reserved bolt hole embedded parts and standby bolt hole embedded parts; a hanging ring is arranged at the top of the embedded plate; and a closed connecting rope is arranged on the hanging ring in a penetrating mode. The invention further discloses the shield tunnel pipeline support anti-falling device in the earthquake high-intensity area. Due to the structural design, prefabricated members can be accurately positioned during production in a factory, so that the situation that a shield segment structure is damaged by a post-driven anchor bolt is avoided, the situation that individual embedded parts are not replaced after being damaged by earthquake force is avoided, the situation that the support falls off after being damaged by the earthquake force and the personal safety of evacuating passenger flow is endangered is avoided, and no extra tunnel space is occupied.

The invention discloses a stereoscopic bicycle garage detecting system and belongs to the technical field of bicycle garages. The stereoscopic bicycle garage detecting system comprises a garage, a garage entering groove is formed in the bottom end of the garage, and a CPU and a distance sensor are mounted inside the garage. The surface of the garage is slidably connected with a garage door, and trigger switches are mounted on the surface of the garage door. A card swiping machine is mounted on one side of the garage door and electrically connected with the CPU, and an ultra-high sensor is mounted on the other side of the garage door and electrically connected with the CPU. A card taking machine is mounted at the bottom end of the card swiping machine and electrically connected with the CPU, and an alarm lamp is mounted at the bottom end of the card taking machine. A human body sensor is mounted at the bottom end of the alarm lamp, the trigger switches are symmetrically mounted on the two sides of the garage door, and a pressure sensor is mounted inside the garage entering groove. The stereoscopic bicycle garage detecting system is reasonable, stable and reliable, the information ofa bicycle entering the garage can be detected, and it is guaranteed that the bicycle can stably and reliably enter the garage.

The invention discloses an insulating winding device for a steel cable and a manufacturing process of a winding drum assembly. The insulating winding device for the steel cable comprises a driving shaft, a chamber, a spline pair flange, the steel cable, the winding drum assembly, a guide nut, an adjusting ring, a nut supporting barrel, a shaft end cover, a bearing, a plug, an elastic roller assembly, a bearing gland, screws and a shaft seal. The winding drum assembly comprises a winding drum body, an isolating ring, an isolating sleeve, a winding sleeve, a press plate, a flat head screw, a cylindrical head screw, a flat washer and a T-shaped sleeve. Insulating materials are reasonably used, ingenious structure combination is adopted, and equipment achieves an insulating effect while guaranteeing mechanical performance. The insulating winding device for the steel cable and the manufacturing process of the winding drum assembly can be applied to universal hoisting equipment, can also be applied to winding equipment with special requirements, and are particularly suitable for hoisting equipment required by precise experiments in laboratories, so that the situation that micro electricity generated due to magnetic induction and friction gathers at the tip end of a hook connected with the steel cable and affects the performance index of a hoisted object is prevented. The device is simple in structure and good in insulating performance.

The invention discloses an auxiliary training tester, and relates to the technical field of training testers. The training tester includes a waterproof shell and sealing cover plates, a detection circuit board is embedded in the waterproof shell, the detection circuit board and the waterproof shell are welded and fixed, the sealing cover plates are arranged at the left and right ends of the waterproof shell respectively, the waterproof shell is movably connected with the sealing cover plates, ports at four corners of the detection circuit board are fixedly provided with positioning blocks through welding, and the connection portion of the detection circuit board and the waterproof shell is fixedly provided with first springs through welding. The auxiliary training tester has the advantagesthat by setting a Mblock main board, when a student is connected with the device through a hook and loop fastener, through the connection of the Mblock main board and an ultrasonic sensor, the devicecan detect the distance between the human body and an instrument through the ultrasonic sensor to replace a teacher to test the students' action specifications, and when the human body is far from ornear the instrument, the device gives an alarm.

The invention provides an escape protection device, system and method and a wind generating set. The escape protection device is used for the wind generating set and can be connected with a suspensionpart installed on the wind generating set through a sling. The escape protection device comprises a bearing main body, a sling connecting part and a magnetic adsorption part; the bearing main body isprovided with a back plate and a supporting structure, and the supporting structure is arranged on the back plate and defines a supporting space together with the back plate so as to support escape people and objects; the sling connecting part is arranged on the bearing main body so that the bearing main body can be connected to the sling through the sling connecting part; and the magnetic adsorption part is arranged on the side, away from the supporting space, of the bearing main body so that the bearing main body can be attracted to a tower barrel of the wind generating set through the magnetic adsorption part. According to the device, system and method and the wind generating set, the problem that the escape person is prone to swing or even collide the tower barrel due to influence ofthe wind power in the process of landing on the floor from a cabin of the wind generating set can be solved, and then the one or multiple of the purposes of ensuring the personal safety of the escapepersonnel, prolonging the service life of the escape device and improving the reliability of the escape device can be achieved.

The invention discloses a construction method for preventing drilling and hole spraying in the drilling construction process of an extremely soft coal seam. The construction method comprises the following steps that a plurality of parameters such as peak strength, tensile strength, ground stress and the like of a coal body are measured, and a critical drilling diameter for preventing a hole spraying instability phenomenon of a drilled hole is calculated by utilizing a derived formula; after a first-level drill hole is constructed according to the calculated critical drilling diameter, a curing material is injected into the constructed drill hole, and loose coal around the drill hole is solidified; and after consolidation material is solidified, a second-level drill hole (namely a gas extraction drill hole) is constructed in a consolidated area, and construction of one gas extraction drill hole is completed; meanwhile, the diffusion radius of the curing material can also be calculated, so that the phenomenon of instability phenomenon under the action of gas pressure and the ground stress caused by insufficient thickness of the consolidated area of the curing material can be prevented, and the curing material can be saved; grouting pressure is obtained through simulation of a simulation software, and the situation that personal safety of constructors is endangered due to the fact that the grouting pressure is too large is avoided.