84results about How to "Avoid personal accidents" patented technology

The invention relates to a workover device in drill floor type, used in non-manned operation under the oil well, wherein it is formed by driving control room 1, thick support post 2, discharge tube 3, lifter 4, amplitude-variable hydraulic cylinder 5, support post base 6, well-open hydraulic blowout preventer 7, drill floor hydraulic base 8, fixing hydraulic clamp disc 9, back tyre, back driving bridge 10, hydraulic clamper 11 with flexible sliding channel 11, hydraulic gear box 12, high-pressure gear pump 13, hydraulic torque converter 14, front tyre, front driving bridge 15, engine 16, frame and drill floor 17; the front part of frame 17 is arranged with driving control room 1, engine 16, hydraulic torque converter 14, hydraulic gear box 12 and high-pressure gear pump 13, while the back part has fixing hydraulic clamp disc 19, support post base 6, and hydraulic clamper 11; the support post base 6 is mounted with thick support post 2, discharge tube 3 and lifter 4. The invention can automatically set discharge tube and improve the working efficiency.

The invention discloses a power lithium ion battery thermal runaway early warning system. The system comprises a microprocessor and an alarming apparatus, and the system is characterized in that the system further comprises an electric signal monitoring unit, a smog monitoring unit, a temperature monitoring unit, a controller and a human-computer interaction end. One ends of the electric signal monitoring unit, the smog monitoring unit, the temperature monitoring unit are connected to the lithium ion battery respectively, the other ends are connected to the microprocessor, one connecting end of the controller is connected to the microprocessor, and the other end of the controller is connected to the alarming apparatus. The invention further discloses a power lithium ion battery thermal runaway early warning method applicable to the system. The power lithium ion battery thermal runaway early warning system can conduct monitoring on the charge-discharge voltage, electric current, battery temperature and smog in a battery package of the lithium battery, can perform early warning in time according to a monitoring result and notify a user to manage in time, and is applicable to other fields of energy storage equipment, low-speed scooters, passenger cars, business cars and aviation and the like.

The invention relates to an oil field operation device, in particular to an oil field workover treatment machine. The machine body is arranged on a hydraulic load-bearing traveling gear and is interlocked with the hydraulic load-bearing traveling gear. Hydraulic tongs connected with a telescopic bracket on the machine body can be extended out and retracted with the telescopic bracket. A clip seat is positioned below the hydraulic tongs and is arranged on a well head. An elevator which is suspended onto the machine body can reciprocate up and down. A faucet is positioned above the machine body and the clip seat; a pipe throwing device is arranged on the faucet and the machine body; and a clip unlocking device and a clip locking device corresponding to the elevator are arranged on the clip seat and the pipe throwing device respectively. A righting mechanism and a valve mechanism are further arranged on the faucet. A control cabinet is arranged on the machine body; and the clip seat, the hydraulic tongs, the elevator and the pipe throwing device are connected with a control system in the control cabinet respectively. The oil field workover treatment machine can be assembled and disassembled conveniently and rapidly, thereby not only facilitating transportation, but also changing the positions to meet the requirements of different work. Simultaneously the machine can be laid freely at a well field according to the practical conditions.

The present invention relates to a safety protection device for solitary old man or woman based on supply line of life. Said safety protection device includes four digital meters of water meter, electric meter, heating meter and gas meter and data acquisition interface connected with four meters which are mounted in the interior of solitary old man or woman room, and egression sensor, main controller nd communication interface which are mounted on the room door. Besides, said invention also provides the application method of said safety protection device.

A real-time power supply operation personnel risk evaluation and decision making system is characterized by comprising a control center data acquisition and monitoring system, a power supply operation terminal device, a power distribution drawing and source geological information system, a power supply operation personnel risk evaluation module and a power supply operation decision making module which are respectively connected with a data input / output module; the control center data acquisition and monitoring system and the power supply operation terminal device are further respectively connected with a remote control operation locking / unlocking module; the power supply operation personnel risk evaluation module and the power supply operation decision making module are further respectively connected with a power supply operation personnel safety historical database module. The invention further relates to the real-time power supply operation personnel risk evaluation and decision making method adopting the system. By the adoption of the system and the method, the synchronization of the power supply operation personnel risk evaluation and decision making, the power supply operation on-site information and an electric power system state can be realized, and the information transmission is fast and accurate, and can be scientific, elaborate and quantized in future.

The invention discloses a solar-energy electric power overhauling ladder and belongs to the field of electric power overhauling equipment. The solar-energy electric power overhauling ladder comprises grab rods (1), foot rests (2), a control cabinet (3), a solar cell panel (4), a hinge joint seat I (5), an electric telescopic rod I (6), a connecting plate (7), hinge joint seats II (8), two electric telescopic rods II (9), two embracing hoops (10), a top plate (12) and LED lamps (13). The solar cell panel (4) is arranged on the control cabinet (3), and storage batteries are arranged in the control cabinet (3). Two ends of the electric telescopic rod I (6) are connected with the connecting plate (7) and the foot rests (2), the top plate (12) and the hinge joint seats II (8) are arranged on the connecting plate (7), the two embracing hoops (10) are hinged to the hinge joint seats II (8), and two ends of the two electric telescopic rods II (9) are hinged to the side faces of the top plate (12) and the embracing hoops (10). The solar-energy electric power overhauling ladder can be prevented from sideslipping and sliding down when leaning against a telegraph pole, and is capable of lighting, simple and convenient to operate and capable of ensuring safety.

The invention relates to an automatic change-over switch for two power sources. The automatic change-over switch comprises a control circuit board, a main breaker, an auxiliary breaker and a busbar device into which an A-phase copper bar, a B-phase copper bar, a C-phase copper bar and an N-phase copper bar are inserted in a connecting mode, wherein the busbar device is fixed inside an installation base. Two adjusters at the switching-on positions and a motor are fixed on a motor bracket, a driving rotary table to which an instrument part is connected in a riveting mode is clamped to a rotating shaft of the motor, two sliding arm guiding blocks are inserted to two pairs of inserting grooves of the sliding arm guiding blocks respectively, four sliding block sliding guiding rods are placed on two sliding block brackets respectively, and each sliding block bracket is provided with a sliding block in a buckling mode, wherein guiding columns are fixed on the sliding blocks. Sliding arms are placed on the two sliding arm guiding blocks and the two sliding blocks, the instrument part is arranged in rectangular holes of the sliding arms, the two guiding columns are arranged inside V-shaped strip holes of sliding arm faces, a mechanical switching-on indicator is fixed on the faces of the sliding arms, and a controller cover, a breaker cover and an installation bottom plate are fixed on the front face and the bottom face of the installation base respectively, wherein the controller cover is provided with an isolation electric lock. The automatic change-over switch has the advantages of being compact in overall structure, high in protection level, reliable and low in cost.

The present invention discloses a stacking overhead crane and ground conveyer interlocking protecting method. Said method includes the following steps: using detection switch to detect stacking overhead crane position over the ground coveyer which is controlled by program controller PLC system, transferring the action signal of detection switch to the program controller PLC system of working station to which said ground conveyer is belonged, according to said signal said program controller PLC system can lock said ground conveyer to stop its operation. All the í‹lockingíŒ and í‹releasingíŒ operations can be automatically implemented by PLC system.

The invention discloses an annular kiln with a movable flat top. The annular kiln with the movable flat top comprises a kiln body, a kiln crown and kiln walls arranged on the two sides. Compared with the prior art, the annular kiln with the movable flat top is characterized in that the kiln crown is the movable flat top, wherein the movable flat top is formed by detachably connecting a plurality of steel structural frames which are in lap joint with one another; each steel structural frame is provided with idler wheels, wherein the idler wheels are matched with tracks arranged at the upper ends of the kiln walls; the lower end face of the movable kiln crown is provided with an insulating layer; a hot gas recycling pipeline is arranged on the kiln crown. The annular kiln with the movable flat top has the advantages of saving money, and being convenient to place, high in degree of mechanization, capable of lowering labor intensity for workers and improving work efficiency, good in heat preservation effect when green bricks are fired, high in rate of finished products, rapid in cooling speed, easy to cool for brick taking, convenient to maintain, and particularly suitable for overall transformation of an existing old kiln.

The invention discloses a ladder with a sliding hoop. The ladder is characterized in that a guide rail, a fixed hoop and a sliding hoop are arranged at the upper end of the ladder, wherein the fixed hoop is fixedly connected with the right part of the guide rail; a slide block of the sliding hoop is slidingly matched with the left part of the guide rail; and one side of the ladder is provided with a sliding locking device which is connected with the sliding hoop. The fixed hoop and the sliding hoop are symmetrical clips which surround a pole; one end of the fixed hoop is fixedly connected with the right part of the guide rail through a piece of connection steel channel; and the slide block of the sliding hoop is a slide sleeve. The ladder with the sliding hoop, disclosed by the invention, is simple in structure and practical; the sliding hoop moves towards the pole to be matched with the fixed hoop; and the ladder and the pole are firmly fixed so that an operator can smoothly climb the pole for work, the number of constructors can be reduced, and human injuries are avoided.

The invention discloses an environment-friendly water-based insect aerosol and a preparation method of the environment-friendly water-based insect aerosol, wherein DME serves as propellant for filling. The prepared environment-friendly water-based insect aerosol is composed of quasi pyrethrin-class insecticidal active compounds, water, the propellant and the like, and an aerosol tank is filled with the quasi pyrethrin-class insecticidal active compounds, the water, the propellant and the like. The insecticidal active compounds are the compound of quasi pyrethrin-class insecticides, and the mass ratio of the insecticidal active compounds is 0.33-0.60%; the aerosol further comprises, by mass, 1-4% of surface active agents, 0.01-0.12% of corrosion inhibition anti-corrosion agents, 0.1-0.28% of penetrating agents, 6-18% of solubilizing agents, a proper number of complexing agents, a proper number of wetting agents, a proper number of defoaming agents, excipient and 0.01-0.026% of essences, wherein the excipient is purified water or deionized water, and the sum of the mass percents of the raw materials and the auxiliary materials is 100%. The liquid contained in the environment-friendly water-based insect aerosol is homogeneous and transparent. The retention period is more than four years. Mosquitoes, flies, cockroaches, ants, white ants, mites, lice, bugs, ticks, fleas and the like are killed in an environment-friendly mode, and the repelling function and the function of the long lasting period are achieved. The aerosol is an efficient and high-cost-performance product. The aerosol does not exist in domestic and foreign markets.

A heat-shrinkable tube dry expander includes a feed device, a heating device, an expanding die and a draughting mechanism that are arranged from up to down. The heating device includes a far infrared heater; the far infrared heater is provided with an inner heating cavity. The dry expander has a high heating efficiency and drives stably; the axial shrinking rate of the manufactured products is little; besides, the dry expander is environment-friendly, saves energies, has no pollution, protects the health of operating personnel and saves a great amount of water. The invention also provides a dry expander set which is formed by multiple dry expanders; can reduce the quantities of the operating personnel to the best, reduces the human cost and improves the production efficiency. An operating platform is arranged between every two dry expenders, thus being convenient for operation and maintenance as well as being capable of improving the personal safety of the operating and maintaining personnel.

The invention relates to a current transformer operation lead suspension device comprising a base (2) and a movable support, the movable support comprises a first vertical rod (11), a second vertical rod (12) and a third vertical rod (13), the other side of the top end of the first vertical rod (11) and the other side of the top end of the second vertical rod (12) are provided with fixing bolts (3) used for fixation after the height of the movable support is adjusted, the bottom end of the first vertical rod (11) is in threaded connection with a preset fixing hole of the base (2), the side faces of the top ends of the first vertical rod (11), the second vertical rod (12) and the third vertical rod (13) are provided with line holes (4), a secondary line (6) can penetrate through the line holes (4), the top face of the third vertical rod (13) is provided with a hook (51), one side of the hook (51) is provided with an opening, the other side of the hook (51) is provided with two clamping pieces (52), and the clamping piece (52) located at the upper portion is provided with a clamping bolt (53) for fixing the secondary line (6).

A polymerizer polishing device comprises a comprehensive base frame, an upper polymerizer wall polishing machine, a lower polymerizer wall polishing machine and a polymerizer outer controller. The comprehensive base frame comprises a shaft-base-type end cover and a double-shaft-base frame body. The upper polymerizer wall polishing machine is arranged between the shaft-base-type end cover and the double-shaft-base frame body. The lower polymerizer wall polishing machine is arranged at the bottom of the double-shaft-base frame body. The upper polymerizer wall polishing machine and the lower polymerizer wall polishing machine both comprise double-rotating-wheel polishing machine frames and multi-action polishing machines. The polymerizer outer controller is provided with a video displayer, an operation and control handle and a centralized-control wire cable. The situation in a polymerizer is observed through the video displayer, and the upper polymerizer wall polishing machine and the lower polymerizer wall polishing machine are controlled to polish the inner wall of the polymerizer through the operation and control handle. Even if high-temperature chemical gas or various poisonous and harmful chemical gases exist in the polymerizer, polishing work can be carried out timely, and the accident that a maintaining worker is poisoned or injured can be avoided. Accordingly, the polymerizer polishing device is reasonable in structure, easy to operate and control and capable of improving production efficiency and preventing human injury.

The invention discloses a robot end executor suitable for conveying compact-space bagged materials. The robot end executor comprises a frame body assembly, a swinging assembly, grabbing assemblies anda servo assembly; the frame body assembly is used for supporting the swinging assembly, the grabbing assemblies and the servo assembly; the servo assembly and the swinging assembly drive the grabbingassemblies to carry out grabbing and putting actions; the frame body assembly comprises an upper fixing plate and a distance sensor; the servo assembly comprises a servo motor and a connecting shaft;the swinging set comprises a supporting plate, air cylinders, a rack, a winding arm shaft and a clutch gear; and each grabbing assembly comprises swing rods, a connecting rod, a connecting rod grabbing tooth, vertical plate grabbing teeth and a grabbing tooth transmission shaft. The robot end executor has the advantages that the problems that the labor is intensive, the space is small, the equipment adaptability is poor, the occupied space is large, the structure is complex, the efficiency is low and the like in the fields of bagged material producing, conveying, stacking and the like can besolved, and automation in the bagged material conveying process can be realized; the production efficiency can be improved, and the production cost can be lowered; and the whole process is safe, reliable, fast and efficient, and the robot end executor can be widely popularized in the industries with narrow carrying space and heavy work.

The invention discloses a switch cabinet safety warning method and device and a storage medium. The method comprises the steps: obtaining the live parameters of a switch cabinet in real time during the operation of the switch cabinet, determining whether the working state of a circuit breaker is abnormal or not according to the live parameters, and determining whether there is a person entering alive interval by mistake or not; when the working state of the circuit breaker is abnormal, a fault signal is sent to operation and maintenance personnel to repair the circuit breaker; and when the person enters the electrified interval by mistake, an alarm signal is sent out to remind the person entering by mistake. Operation and maintenance personnel can be reminded to repair the circuit breakerin time when the circuit breaker breaks down, whether the personnel enter the electrified interval by mistake or not can be determined according to the electrified parameters of the switch cabinet, the personnel entering the electrified interval by mistake can be reminded to quit the electrified interval in time, and personal accidents are avoided.

The invention discloses a substation remote operation warning system comprising a personnel entering and leaving induction device and a remote operation prompt device which are in communication connection with each other. The personnel entering and leaving induction device is used for monitoring the personnel entering and leaving condition of a substation switch room and sending the information to the remote operation prompt device. The remote operation prompt device is used for sending the number information of personnel in the substation switch room to a display terminal of a control center. The remote operation prompt device is equipped with a personnel evacuation alarm module. If there is someone in the substation switch room, the control center sends personnel evacuation information to the remote operation prompt device before controlling controlled equipment, and the personnel evacuation alarm module notifies the field staff to evacuate the controlled equipment. The situation in which personal injury may be caused as there are still workers near the controlled equipment when the equipment is remotely operated is avoided.

The invention provides a carbon-fiber double-conductor grounding heating cable. The carbon-fiber double-conductor grounding heating cable comprises a main wire and heating wires. The heating wires are connected with the main wire. The heating wires are connected in parallel. The main wire comprises a live wire body, a first null wire body and a first grounding wire body. Each heating wire comprises a second null wire body, a second grounding wire body and an electric heating wire body. The carbon-fiber double-conductor grounding heating cable has the advantages of being safe to use and good in electrical property.

The invention discloses a ground lead and belongs to the technical field of ground leads. The ground lead comprises an extension-type insulating rod, a duck-billed impact line clamp, a ground soft copper wire and a ground clamp, wherein the ground soft copper wire penetrates through an inner hole of the extension-type insulating rod, the left end of the ground soft copper wire is connected with the duck-billed impact line clamp, the right end of the ground soft copper wire is connected with the ground clamp, the duck-billed impact line clamp is hinged to the left end of the extension-type insulating rod through a connecting piece, and provided with a locking mechanism, and the bent section of the left end of the ground soft copper wire extends out of the inner hole in the left end of the extension-type insulating rod and is connected with the duck-billed impact line clamp. By adjusting the angle between the duck-billed impact line clamp and the extension-type insulating rod, an operator stands on a pole to hang a ground lead to an overhead vertical wire conveniently, the risk that the body leans badly when the operator hangs the ground lead is eliminated, safety can be guaranteed, human injuries are avoided, and labor efficiency is improved.

The invention discloses a flexible and efficient unstacking robot system for a bagged material. The flexible and efficient unstacking robot system for the bagged material comprises a robot base, a robot, a feeding box, a bag-breaking saw blade, a terminal actuator, two pallet positioning blocks and a waste bag collecting box, the robot is mounted on the robot base, the terminal actuator is mountedat the terminal of the mechanical arm of the robot, each pallet positioning block is in an L shape, and the two pallet positioning blocks are used in pairs and mounted in a left-right symmetry and used for positioning a pallet of storing the material. The flexible and efficient unstacking robot system has the beneficial effects that the problems of low equipment adaptability and compatibility andefficiency in labor-intensive fields such as unstacking, transporting, bag breaking and waste bag managing of the bagged material needing to be broken can be overcome, self adapting of the bagged material needing to be broken and the automation of unstacking, bag breaking and waste bag recovering processes are achieved, and the flexible and efficient unstacking robot system can be directly used for self adapting, unstacking, bag breaking, waste bag recovering of the bagged material needing to be broken in a production line and not limited by the shape, quantity and arraying manner of the bag.

The invention discloses a packaging machine suitable for inner and outer separation of packaging bags. The packaging machine comprises a bag warehouse unit and a main machine unit, wherein the bag warehouse unit comprises a distribution box, a bag warehouse frame and a bag taking mechanism, the main machine unit comprises a main upper frame, an auxiliary upper frame and a chassis, a carrying trolley is further arranged on the chassis, and a hopper mechanism, a bag stroking mechanism, a bag tying mechanism and a bag compacting mechanism are sequentially arranged at the position, above the carrying trolley, on the main upper frame from front to back; and the packaging machine further comprises a bag feeding mechanism and an edge folding and bag sewing mechanism. The packaging machine has thebeneficial effects that through the arrangement of the bag feeding mechanism, the bag stroking mechanism, the bag tying mechanism and the bag compacting mechanism, automatic bag feeding, tying, edgefolding and sewing of the inner and outer separated packaging bags are achieved, automation of the inner and outer separated packaging bag process is achieved, whole-process automation and automatic fault handling can be achieved, the labor condition is improved, personal accidents are avoided, the production efficiency is improved, the production cost is reduced, the whole process is safe, reliable, quick and efficient, and the packaging machine can be widely popularized and used.

The invention discloses a thermal runaway early warning system for a lithium ion battery of a new energy automobile. The system comprises: an electric signal monitoring unit used for monitoring an electric signal, a temperature monitoring unit used for monitoring a temperature signal, a microprocessor used for sampling and collecting the electric signal and the temperature signal, judging the state of the lithium ion battery and sending out a corresponding control instruction, a controller which is used for receiving the control instruction; and the alarm which is used for giving an alarm. The invention further provides a new energy automobile lithium ion battery thermal runaway early warning method. The thermal runaway early warning system has the beneficial effects that the charging and discharging electric signals and the battery temperature of the lithium ion battery can be monitored, the thermal runaway phenomenon of the lithium battery under different conditions can be judged and identified, early warning can be carried out in time according to the monitoring result, a user can be notified to process in time, and the thermal runaway early warning system is suitable for various new energy automobiles.

The invention discloses a live-line region LED alarm device, and belongs to the technical field of power safety protection. A solved technical problem is to provide the live-line region LED alarm device which can give a sound-light alarm protect when a maintenance worker gets close to a dangerous point. An employed technical scheme is that the device comprises a box body and a sound-light alarm circuit board disposed in the box body; the sound-light alarm circuit board is provided with a power circuit board, an induction processing circuit board, an LED alarm display circuit board, a voice alarm circuit board, and a power input terminal A1; a front panel of the box body is provided with an LED display screen and a loudspeaker; a side panel of the box body is provided with a power input connector, a USB data reading-writing connector, and a power switch; the LED display screen, the loudspeaker, the power input connector, the USB data reading-writing connector and the power switch are respectively connected with the sound-light alarm circuit board; and the device is suitable for the power field.

The invention discloses a submerged arc furnace adjusting and control method. The functional relationship existing between the heat distribution coefficient C and furnace burden specific resistance Rmaterial ratio is as follow: C=a*R material ratio<2>+b*R material ratio, wherein a<0, and when C=0.5, R material ratio=-b / 2a, and a submerged arc furnace is adjusted and controlled with the functionalrelationship. The submerged arc furnace is adjusted and controlled through the method, the zone where the furnace burden specific resistance is located is judged through the furnace condition of thesubmerged arc furnace, then an operator is guided to adjust the furnace burden specific resistance according to production requirements, and the furnace burden specific resistance is fast and accurately adjusted to a furnace burden fusion zone or a high-temperature reduction zone to achieve stable production. The yield of the submerged arc furnace adjusted and controlled through the method is greatly increased, power consumption is reduced obviously, and human injuries and equipment accidents are avoided.

The invention discloses a changing device for molds for a building block forming machine. In the changing device, fixed shaft seats (7) are fixed on the upper part of a palletizing machine (1) through a connecting base (6), a rotating vertical shaft (8) is sleeved in a pressure bearing (10) arranged in the fixed shaft seats (7), the upper part of the rotating vertical shaft (8) is sleeved with a rotating shaft housing (9), the inner end of a hoisting arm (11) is arranged between the upper and lower fixed shaft seats (7), the outer end of the hoisting arm (11) is connected with the rotating shaft housing (9) through a diagonal draw bar (12), and an outer end hoisting pulley (13) is connected with a pulley hook (15) through a steel rope (14). In normal time, the hoisting arm (11) is rotated and tightly attached to the plane of the palletizing machine (1), but is rotated to a position in front of a building block forming machine (3) when a mold (M) is to be changed, so that the pulley hook (15) can first hook the mold (M) and drive the hoisting arm (11) to rotate on the rotating main shaft (8) to remove the mold (M) from a main machine, and then hook a new mold (M) and drive the hoisting arm (11) to rotate on the rotating main shaft (8) to place the new mold (M) on a specific position of the building block forming machine (3). The changing device has the advantages of quick change, high working efficiency and high safety.

The invention discloses a remote maintaining device for a reaction kettle. The remote maintaining device for the reaction kettle comprises a telescopic kettle wall support frame, a rotary maintaining arm and a remote controller, wherein the telescopic kettle wall support frame comprises an upper opening-closing kettle support frame and a lower opening-closing kettle support frame; the upper opening-closing kettle support frame and the lower opening-closing kettle support frame are arranged symmetrically up and down; a telescopic spring, a telescopic cable and a hydraulic support pillar are arranged between the upper opening-closing kettle support frame and the lower opening-closing kettle support frame; the rotary maintaining arm comprises a rotary base and an amplitude changing rocker arm; a rocker arm motor is arranged on the rotary base; the amplitude changing rocker arm is provided with a maintenance lighting lamp, a pick-up lens and a sleeve type tool base. Through the remote maintaining device for the reaction kettle, the telescopic kettle wall support frame and the rotary maintaining arm are controlled through the remote controller; the remote maintaining device for the reaction kettle can replace maintenance workers to enter a vertical kettle body for checking and maintaining devices; even high temperatures or various virulent and harmful chemical gases exist in the vertical kettle body, the remote maintaining device for the reaction kettle also can maintain and repair in time; meanwhile, accidents that the maintenance workers are poisoned or injured are avoided. Consequently, the remote maintaining device for the reaction kettle is reasonable in structure, easy to control and capable of improving the production efficiency and avoiding the worker injuries.

The invention discloses a hoisting and recovering system and a hoisting and recovering method for an underwater robot. The system comprises a shell, a locking cover is installed at the top end of the shell, a fixing ring is installed below the locking cover, and the fixing ring, the shell and the locking cover form an open type recycling device; a buoyancy ball is installed between the shell and the fixing ring, the upper end of the buoyancy ball is connected with a pull rod, and the pull rod penetrates through the locking cover. The lower end of the buoyancy ball is connected with one end of a connecting rod, the connecting rod penetrates by the locking cover to be connected with a locking block, the locking block is installed in the shell through a pin, and a connecting device of the underwater robot is placed in the shell. According to the invention, lifting and recovery of various types and levels of underwater equipment are realized, so that the purposes of high interchangeability and standardization are realized, and the manufacturing and maintenance cost is reduced.

A method for preventing mistaken entrance into a charged interval in an electric power engineering operation can timely remind and stop an operator mistakenly entering a barrier and prevent the mistaken entrance into the charged interval (a charged tower) to result in personal accidents. The method comprises the steps that a detector is temporarily arranged in a space required to monitor human body entrance in a prohibition barrier according to a field situation; an alarm is carried by a working principal or left in a master control room; the detector is started; once someone enters the space monitoring the human body entrance, the detector induces to confirm that a human body enters; after the detector confirms that someone enters, a wireless signal transmitter is automatically triggered to transmit a wireless alarm signal; the alarm automatically triggers acousto-optic alarm and prompts the number of the detector giving the alarm; and the working principal or a person in the master control room obtains the number of the detector giving the alarm after finding the alarm given by the alarm, immediately goes to a position where a person mistakenly enters the prohibition barrier according to the number of the detector giving the alarm, and orders the mistakenly entering person to leave the prohibition barrier.

The invention discloses an environment-friendly water-based household insect aerosol prepared by charging dimethyl ether (DME) as a propellant and a preparation method thereof. The prepared environment-friendly water-based household insect aerosol is formed by raw insecticides and the like, water and the propellant filled in an aerosol tank, wherein the raw insecticides are compounds of botanical insecticides and pyrethroid insecticides and the mass ratio is 0.3-0.61%. The insect aerosol also comprises 1-3% of surfactant, 0.01-0.10% of corrosion inhibitor, 0.1-0.22% of penetrant, 6-16% of solubilizer, a proper amount of complexing agent, wetting agent and antifoaming agent, an excipient and less than 0.026% of essence, wherein the excipient is purified water or deionized water; the total mass percent of the raw and auxiliary materials is 100%. Homogenous phase transparent liquid is formed by the content liquid of the environment-friendly water-based household insect aerosol. The product is used for killing mosquitoes, flies, cockroaches, ants, termites, mites, lice, bugs, ticks, fleas and the like in an environment-friendly manner, has the multifunction (MIK) characteristics of repelling and long duration, has high efficiency and high cost performance and is not yet available on the domestic and foreign markets.

The invention discloses a device for detecting fracture and electric leakage of a power transmission cable, and the device comprises a work box which is internally provided with a work cavity, the work cavity is internally provided with two work box grooves which are in bilateral symmetry, and the two work box grooves are internally in sliding connection with an electric wire passing through the work cavity. According to the invention, whether the power transmission cable is insulated, aged and leaks electricity due to long-term repair loss or not is repeatedly checked through the checking device, and whether the power transmission cable is tightened or not or whether the power transmission cable is not tightened and is in a broken state or not is detected through the detection device; andthe reminding device gives out light to remind pedestrians and constructors when the checking device detects that the power transmission cable leaks electricity or the detection device detects that the cable is not tightened and is in a broken state, so that unnecessary personal accidents are avoided.