82results about How to "Convenient inspection work" patented technology

The invention discloses a patrol robot system for an overhead high-voltage transmission line. The patrol robot system comprises a robot, the overhead line and a ground base station. The overhead line is supported through a cross bar. The robot comprises a robot body, a battery, a walking device, a single-chip microcomputer, a monitor device and a mobile communication device. The ground base station comprises a ground communication device and a ground monitor device. The ground base station and the robot are connected in a satellite communication mode. A robot platform is arranged on one side of the overhead line. The walking device comprises a walking mechanism and an obstacle avoidance mechanism. The walking device is connected with the single-chip microcomputer. The monitor range of the patrol robot is wider, environmental interference resistance is higher, the better obstacle avoidance mechanism is provided, a rest area is provided for the patrol robot, the service life of the patrol robot is prolonged, an automatic charging device is provided, work loads of workers are reduced, and the work of patrolling high-voltage lines and ultra-high-voltage lines can be completed excellently.

The invention relates to a method for examining and managing a thermodynamic system, which comprises the following main steps: scanning information of an examiner, inquiring records of an examining spot, inquiring an examining route, inquiring an examining position and equipment and recording data. Firstly, the information of a job number or a bar code of a working card of the examiner is scanned by a bar code scanner; secondly, the history records of the examining spot are inquired, if no examining spot is found, a prompting message is given, and if the examining spot is found, parameter details are displayed according to a reverse order mode of examining time; thirdly, the examining route is inquired, and the examined examining position is displayed on a display screen; fourthly, the examining position and the equipment are inquired; and finally, a bar code of the examining position is scanned by the bar code scanner to record the data. The invention has simple principle, safe and reliable operation, high degree of automation and wide application range.

The invention provides a multi-rotor-wing patrolling aircraft and a power transmission line patrolling system. The multi-rotor-wing patrolling aircraft comprises a multi-rotor-wing flight device, a line falling walking device, a patrolling device, a control device and a flight end wireless transmission interface, wherein the multi-rotor-wing flight device comprises a cabin, a plurality of rotor wings and an undercarriage; the line falling walking device comprises a support frame, a guide camera and a moving mechanism; the patrolling device comprises a patrolling camera; the flight end wireless transmission interface is wirelessly connected with a ground command device; the control device receives a command sent by the ground command device, controls the rotor wings to fly and controls the moving mechanism to move along a to-be-mounted conductive ground line. The power transmission line patrolling system comprises the multi-rotor-wing patrolling aircraft and the ground command device, wherein the ground command device particularly comprises an action command device, an image analyzing device, a display and a ground end wireless transmission interface. The power transmission line patrolling system has an accurate power line mounting function; the patrolling view field is widened; the patrolling efficiency is improved; the labor cost for patrolling is lowered.

The invention relates to the technical field of electronics and discloses a DC-DC power supply device, a voltage regulation method and network equipment in order to improve the testability of circuits. In the invention, at least one regulation module and a control module are arranged in the DC-DC power supply device, wherein the control module controls the conduction states of upper and lower switch tubes in a resistor array in the regulation module so as to regulate the offset of an output voltage to control the size of the output voltage. Thus, the synchronous regulation of one or more DC-DC switch power supply modules can be realized without manual box opening and power-interrupting operation and the precision regulation of the output voltages of the DC-DCs switch power supply modules is realized without a large amount of circuit hardware regulation and change, so that the testability of the circuit and operation smoothness of the whole circuit test process are improved effectivelyand the product test and examination work is very convenient. The invention also discloses the power supply method and the network equipment.

The invention discloses an adjustable food inspection workbench, which comprises a bottom plate, a supporting leg, a rotating shaft, a motor, a first internal thread sleeve, a first connecting rod, a second connecting rod, a side plate, a double-axis motor, and a threaded rod , the second internally threaded sleeve, the third connecting rod, slide rails, sliders, universal rotating shaft and test tube rack, the present invention is provided with a motor, a rotating shaft, the first internally threaded sleeve, the first connecting rod and the second connecting rod The rod, through the cooperation of the above parts, makes the roller contact or separate from the ground, which is convenient for the movement of the workbench. It is equipped with a double-axis motor, a threaded rod and a third connecting rod. The height of the workbench body can be adjusted through the cooperation of the above parts, which is convenient for different heights. It is equipped with slide rails, sliders and universal rotating shafts, and the support rod is pulled to make the sliders slide along the slide rails, which is convenient for the staff to take and place the test tubes on the test tube rack. The rotating shaft can realize the adjustment of the angle of the test tube rack.

The invention provides a routing inspection air vehicle with multiple rotor wings and an electric transmission line hanging method of the routing inspection air vehicle. The method comprises the steps that when it is judged that wires and ground wires to be hung are located on the upper area of an image shot by a guide video camera of the routing inspection air vehicle with the multiple rotor wings, the rotor wings of the routing inspection air vehicle are controlled to fly upwards; when it is judged that the wires and ground wires to be hung are located on the lower area of the image, the rotor wings are controlled to fly downwards; when it is judged that the wires and ground wires to be hung are located on the area close to the image, the rotor wings are controlled to fly horizontally and get close to the wires and ground wires to be hung; when it is judged that the wires and ground wires to be hung are located on the line falling area of the image, the rotor wings are controlled to stop flying and land. The routing inspection air vehicle with the multiple rotor wings has the accurate power line hanging function, broadens routing inspection view, improves routing inspection efficiency, and lowers the labor cost of routing inspection.

The invention discloses a substation electrical equipment inspection system. The substation electrical equipment inspection system includes an aircraft, a triaxial aerial photography holder, an infrared imaging instrument, a camera and a control unit, wherein the triaxial aerial photography holder is installed on the aircraft, the infrared imaging instrument and the camera are arranged in the triaxial aerial photography holder, the triaxial aerial photography holder is provided with a holder movement control mechanism used for controlling the movement of the triaxial aerial photography holder, and the control unit includes an airborne main control unit and a ground control unit, wherein the airborne main control unit is connected with the holder movement control mechanism, the infrared imaging instrument and the camera respectively, and the airborne main control unit is connected with the ground control unit through a wireless communication device. According to the substation electrical equipment inspection system of the invention, the infrared imaging instrument and the camera are installed on the aircraft; acquisition angle positions of the infrared imaging instrument and the camera are adjusted through the triaxial aerial photography holder; infrared temperature measurement can be performed on substation electric equipment through the infrared imaging instrument; the appearance of the equipment is observed through the camera; and therefore, labor intensity can be greatly reduced, and inspection efficiency and accuracy can be improved.

The invention relates to the technical field of refrigerators, in particular to a refrigerator with a shelf adjustable in height. The refrigerator comprises a door shelf body, guide rails and a door shelf front cover, wherein the guide rails are arranged on a refrigerator door body and vertically extend, and the door shelf front cover is connected with the door shelf body. The refrigerator further comprises connecting blocks, sliding blocks and reset mechanisms. Guide grooves are formed in the lateral portions of the door shelf body. The reset mechanisms and the sliding blocks are arranged in the guide grooves. The sliding blocks can slide along the guide grooves. One ends of the reset mechanisms are connected with the guide grooves in an abutting-against mode, and the other ends of the reset mechanisms are connected with the sliding blocks in an abutting-against mode. Sliding block clamping connection parts connected with the guide rails in a clamped mode are arranged on the sliding blocks. One ends of the connecting blocks are connected with the door shelf front cover in a clamped mode, and the other ends of the connecting blocks are connected with the upper portions of the sliding block clamping connection parts in an abutting-against mode. By means of the refrigerator, the user convenience is improved, the position of the door shelf can be adjusted within the height scope limited by the guide rails on the two sides without taking out the door shelf, and the refrigerator is convenient to operate; in addition, the refrigerator is simple in structure and easy to install and manufacture, and the reliability is guaranteed.

The invention relates to a dendrite corrosion low-power checkout integration method. The method comprises the following steps of: firstly, milling, grinding, polishing a sample so that the checkout surface reaches the mirror smoothness; then, corroding the sample and eroding a corrosion reagent on the checkout surface for 1-2 min; washing, wiping and drying; and scanning and shooting by adopting a low-power detection suspension scanner camera device after the checkout surface is corroded, and then, processing and printing the image. The method provided by the invention can realize dressing detection and solve the defect existing in the suspension sample by adopting the low-power detection suspension scanner camera device. The invention can detect the cast-state structure of low-carbon steel, medium-carbon steel, high-carbon steel, low-alloy steel or alloy steel, steel blanks and large-size steel samples, observe the solidification structure and the defects thereof as well as the evolution conditions of the solidification structure and the defects of a thermally processed sheet and also check the relation between the solidification structure and the defects and has the advantages of accuracy, easy operability, environmental protection, and the like.

The invention discloses a walking method and a walking device for a no-blind zone intelligent inspection robot for a transformer substation. The walking device comprises a transformer substation and an inspection robot. The method comprises the steps as follows: a walking track for the inspection robot is arranged in the transformer substation according to inspection survey points; and the intelligent inspection robot walks along the track according to a set program, records and stores operating states and parameters of equipment in the transformer substation in the walking process, and simultaneously monitors whether the equipment in the transformer substation has an abnormal state or not. The special track is arranged for the inspection robot; and the track mainly is overhead walking, so that occupation of the floor space can be avoided. The track is a three-dimension track, and can be fully arranged according to the equipment in the transformer substation, so that the condition that the robot can monitor each region is ensured; and no dead angle is achieved.

The invention discloses a controlling system and method for a fireproof door of a utility tunnel. The controlling system comprises a fireproof door and a fireproof door controller connected with the fireproof door, and the fireproof door controller is connected with linkage equipment; the fireproof door controller comprises a central controlling processor and a door closing controlling unit, a monitoring unit and a fire-fighting linkage controlling unit, and the door closing controlling unit, the monitoring unit and the fire-fighting linkage controlling unit are connected with the central controlling processor; signals transmitted from the monitoring unit is processed and analyzed by the central controlling processer, and instructions are transmitted to the door closing controlling unit and the fire-fighting linkage controlling unit; a door closer, a monitoring panel, monitoring equipment and a fire sensor are mounted on the fireproof door, and the monitoring panel is connected with the central controlling processor; and the door closing controlling unit is connected with the door closer, and the fireproof door can be opened and closed by controlling the door closer. The controlling system and method for the fireproof door of the utility tunnel can well deal with door opening and closing and can cooperate with other fire-fighting equipment for working.

The invention relates to the exploration and transportation technology of an underground metal mine, in particular to an adhesive tape inclined shaft. In order to solve the problem caused when the adhesive tape inclined shaft is exploited in the metal mine of which the exploitation scale is large and the exploitation depth is high, the invention provides a way of using the adhesive tape inclined shaft to perform exploitation transportation in the underground metal mine under the condition. The adhesive tape inclined shaft is characterized in that: the whole adhesive tape conveyor section consists of the adhesive tape inclined shaft and an adhesive tape conveyor, is generally arranged outside an ore body and consists of an ore protection and transfer short adhesive tape conveyor section, a main adhesive tape conveyor section (one section or a plurality of sections) and an ore discharging point transshipping conveyor section. The conveying amount of the adhesive tape conveyor is large, and the conveying distance of the adhesive tape conveyor is long. A high-layer shaft tower is not required to be arranged on the ground surface; and a driving station is simple in structure, low in investment and short in construction period. A driving, controlling and detecting system is high in automation degree, relatively simple in structure and low in investment. The cost for the inclined shaft is lower than that for a vertical shaft; after being damaged, an adhesive tape can be replaced in sections; and the operation cost is low. The adhesive tape inclined shaft exploitation way has a good economic benefit.

The invention discloses a sampling device for urine inspection, mainly including a housing, a receiving device, a cup fetching device, a change-over device, a transmission device, a waste storage box,a cleaning device, a power supply device and a control device; the housing includes a placing chamber and a sampling chamber. The sampling chamber is provided with a sample inlet and a sample outlet;the receiving device is arranged in the sampling chamber. The receiving device can extend from the sample inlet; the change-over device is arranged in the sampling chamber and is under the receivingdevice; the transmission device is penetrated through the placing chamber and the sampling chamber; the waste storage box is movably arranged in the placing chamber; the power supply device is arranged in the placing chamber; the sampling device for the urine inspection is simple in operation, and utilizes an automation device to achieve the task of urine sampling, which avoids patients directly receiving urine and is extremely convenient for inspected personnel to take urine samples.

The invention provides an identification card inspection method on the basis of a mobile terminal and the mobile terminal. The verification method comprises the following steps that: the mobile terminal reads an information record stored in a radio frequency card in an identification card to be inspected by a wireless radio frequency identification mode; after carrying out format conversion on the information record, the mobile terminal sends the information record to a monitoring center, wherein the information record subjected to format conversion accords with a wireless communication protocol for carrying out data interaction between the mobile terminal and the monitoring center; and the mobile terminal receives and displays a historical record of the identification card to be inspected, which is returned by the monitoring center according to the wireless communication protocol and is matched with the information record. According to the inspection method, the inspection of the identification card can be completed by utilizing the mobile terminal convenient to carry and the inspection of the identification card to be inspected can be completed without an additional Internet computer, so the convenience is brought to the inspection work of a staff who inspects the identification card, the workload of the staff who inspects the identification card is reduced and the working efficiency is improved.

The invention relates to a waist-mounted power distribution network patrol system, which comprises a waist belt, a first power distribution network patrol instrument and a second power distribution network patrol instrument. The waist belt is tied to a place such as a waist, the first power distribution network patrol instrument and the second power distribution network patrol instrument are hungon the belt, the operation is convenient, and carrying is convenient. Besides, a partial discharge tester, an infrared tester and a noise tester are integrated on a first shell, functions of partial discharge test, infrared temperature measurement and noise test are achieved, multiple mutually-independent testers do not need to be carried, the battery power and charge problems of each tester do not need to be considered, carrying is convenient, use by a patrol personnel is also facilitated, and the patrol efficiency can be improved. Besides, as a gas concentration sensor chip is adopted and the gas concentration sensor chip is attached to the outer side wall of a second shell, while gas detection can be met, the volume of the second power distribution network patrol instrument can be reduced, and carrying by the worker is facilitated.

The invention relates to a power distribution network inspection instrument. The power distribution network inspection instrument comprises a shell, a partial discharge tester, an infrared tester, a noise tester and a controller; the partial discharge tester, the infrared tester and the noise tester are arranged on the shell; and the controller is used for controlling any one of the partial discharge tester, the infrared tester and the noise tester to work, and receiving test data of the tester. According to the power distribution network inspection instrument in the invention, the partial discharge tester, the infrared tester and the noise tester are arranged in the same shell in a centralized manner; the power distribution network inspection instrument has the functions of partial discharge testing, infrared temperature testing and noise testing; furthermore, when the power distribution network inspection instrument is used, the controller selects the corresponding tester to performtest work; for an inspector, mutually independent multiple testers do not need to be carried; the battery capacity and charging problem of the various testers also do not need to be considered; therefore, the power distribution network inspection instrument is convenient to carry and also convenient to use by an inspector; and the inspection working efficiency can be greatly increased.

A high-stability high-pressure patrol mobile robot device include a robot body, A first connecting plate is fixedly connected above the left and right ends of the robot main body, the upper end of themovable seat is fixedly provided with a walking device, A high-voltage wire is slidably connected to the inner lower end of the traveling device, At that upper end of the middle part of the movable seat and directly below the high-voltage wire, a groove is fixedly arrange, A turbine is fixedly arranged in the groove, One end of the turbine motor is drivingly connected with the turbine through a transmission connection mechanism, and the second connection plate is far away from one end of the second mounting plate and is fixedly provided with a shielding plate directly above the robot main body. The invention relates to the field of electric power system monitoring equipment. A high-stability high-voltage patrol inspection mobile robot device can realize that the robot main body completespatrol inspection on a high-voltage line and an ultra-high-voltage line, and is favorable for improving the efficiency of the mobile patrol inspection.

The invention provides an adjustable climbing robot, and belongs to the field of climbing robots. The adjustable climbing robot comprises a main unit and two movable arms, each movable arm comprises aconnecting arm, an extending arm and a driving component, one ends of the connecting arms are connected to the side parts of the main unit, the other end of each connecting arm is rotatably connectedwith the corresponding extending arm, and each driving component is arranged at one end, away from the corresponding connecting arm, of the corresponding extending arm; each driving assembly comprises a driving motor and a driving wheel, the connecting arms are connected with the extending arms through tension springs, and a locking mechanism is arranged on the main unit and is used for fixing the movable arms to the main unit; two driven wheels are arranged on the inner side surface of the main unit; and the top of the main unit is provided with a camera. The climbing robot can flexibly perform climbing operation on tall trees and smooth telegraph poles, and is provided with the camera, so that the climbing robot can shoot tiny parts at high altitude, and convenience is brought to inspection operation of constructors; and the climbing robot has a flexible movable arm structure, so that the climbing robot can be applied to places such as trees and telegraph poles with different sizes.

The invention discloses an operation method for man-machine collaborative inspection of a power distribution network, relates to the field of inspection of power distribution network equipment, and solves the problems of high time consumption and low efficiency of manual inspection. The method comprises the steps that an unmanned aerial vehicle monitors surrounding environment pictures of an inspection object on an inspection route and sends the pictures to an inspection management platform to judge whether flight of the unmanned aerial vehicle is affected or not, the inspection management platform automatically analyzes and plans an affected area and sends the affected area to a mobile terminal and the unmanned aerial vehicle, and workers hold the mobile terminal to reach the inspection area, inspects the influence area to enter the influence area with the inspection object manually, sets a new area inspection task to the unmanned aerial vehicle, the inspection management platform shares, and the unmanned aerial vehicle performs inspection according to the new area inspection task, executes the step C and then executes the step E. The method is high in practicability, can be applied in a man-machine seamless combination mode, and greatly facilitates the inspection operation of the power distribution network.

The invention discloses an intelligent distribution network equipment inspection automation mobile terminal which comprises a bottom shell, the bottom shell is a concave shell, a driving mechanism isfixedly connected to the edge of the upper end of the bottom shell, a supporting surrounding shell is fixedly connected to the edge of the upper end of the driving mechanism, and a top plate is fixedly connected to the upper end of the supporting surrounding shell. A partition plate is fixedly connected to the middle of the inner side face of the supporting surrounding shell, the lower end of thepartition plate is movably connected with the middle of the upper end of a driving mechanism, a rotary supporting base is movably connected to the right side of the middle of the lower end of the topplate, and a first electric push rod is jointly and movably connected between the left portion of the lower end of the rotary supporting base and the right portion of the upper end of the partition plate. And a box shell is fixedly connected to the upper end of the rotary supporting seat, and a retracting and releasing mechanism is movably connected to the interior of the box shell. According to the mobile terminal for automatic inspection of the intelligent distribution network equipment, the participation degree of manpower in the inspection process is reduced, 24-hour uninterrupted inspection operation can be met, and the detection effect is good.

The invention relates to the technical field of inspection devices, and discloses a power transmission line patrol device and a control system thereof. The power transmission line patrol device comprises an inspection device body and a mounting plate, two supporting rods are symmetrically and fixedly connected to the side wall of the mounting plate, and mounting blocks are fixedly connected to the ends, away from the mounting plate, of the two supporting rods; a mounting groove is formed in one side of the mounting block, a transmission mechanism is arranged in the mounting groove, a transmission shaft is rotationally connected to one side of the mounting block through a first rolling bearing, a supporting arm is fixedly connected to one end of the transmission shaft, a roller is fixedly connected to one end of the supporting arm, and a swing arm motor is fixedly connected to the other side of the mounting plate. According to the power transmission line patrol device and the control system thereof, the climbing performance and the obstacle crossing performance of an inspection robot can be effectively improved, the posture and the position of the robot can be positioned, meanwhile, obstacles can be recognized, and the working efficiency of robot inspection is improved.

The invention discloses a weld joint metallographic corrosion method. The method comprises the following steps of: S1, grinding a detected surface of a metallographic sample; S2, corroding the detected surface by adopting a nitric acid alcohol solution; S3, after scratches on the detected surface disappear visually and the contour of a welding seam is visible, stopping corrosion; S4, washing the detected surface with water; S5, corroding the detected surface by adopting an ammonium persulfate aqueous solution; S6, after a second welding bead, a second fusion line and a second heat affected zone outline of the detected surface are visible, stopping corrosion; S7, washing the detected surface with water; and S8, blow-drying the detected surface. According to the weld joint metallographic corrosion method, the weld bead, the fusion line and the heat affected zone in the weld seam can be clearer and distinguishable, a back stain phenomenon affecting weld seam defect display is effectively avoided, inspection work of welding quality is facilitated, the efficiency of weld seam macroscopic metallographic inspection work can be improved, and the technical problem to be solved urgently is solved.

The invention provides a ring main unit active inspection system and method, the system comprises a ring main unit, a main station and a terminal device, a signal acquisition module is connected witha wireless communication module, and the signal acquisition module is used for transmitting state information acquired by the signal acquisition module to a processing module of the main station through the wireless communication module; the processing module is connected with the signal sending module through the encryption module, and is used for processing and verifying the received state data,encrypting the data after the verification is passed, and sending the encrypted data to terminal equipment through the signal sending module; and the terminal device is used for decrypting the processed encrypted data after receiving the processed encrypted data, sending a power-off instruction to the ring main unit according to the decrypted data, sending an instruction for verification after setting time to determine that the ring main unit quits operation, and outputting an overhaul task list. Maintenance personnel carry out active maintenance on the corresponding ring main unit through the maintenance task list. Automatic operation is achieved, inspection work is greatly facilitated, the work efficiency is improved, and the labor intensity is reduced.

The invention discloses a multifunctional polling robot which comprises a supporting plate, wherein universal wheels are fixedly mounted at four corners of the bottom end of the supporting plate, respectively, a square barrel is fixed to the side end of the top surface of the supporting plate, a plurality of cameras are fixedly mounted on two sides of the square barrel respectively, a storage battery is fixedly mounted at the center of one side of the square barrel, a motor is fixedly mounted at the center of the other side of the square barrel, an output shaft of the motor penetrates through the outer wall of the square barrel and extends into the square barrel to be provided with a gear fixedly, and racks are engaged to two sides of the gear. The robot has three using modes by adjusting the four rollers flexibly, so that it is not only convenient to monitor a line of cable groove all around, but also monitor a special line in a floated manner. Meanwhile, the robot can walk on the bottom surface of the cable like a conventional ground robot. The practicality of the robot is improved effectively by the above three characteristics, and therefore, convenience is bright to polling work in the cable groove.

The invention discloses a tower climbing chassis platform of an inspection operation robot and an adjusting method of the tower climbing chassis platform. The platform comprises a chassis main frame, a plurality of front driving mechanisms, a plurality of rear driving mechanisms, a mounting plate, a load-bearing operation base table, a counterweight rotating mechanism and a gravity center adjusting mechanism. The chassis main frame is used for being arranged on a tower frame in a sleeving mode, the front driving mechanisms are located at the front end of the chassis main frame, the rear driving mechanisms are located at the rear end of the chassis main frame, the mounting plate is rotationally connected with the rear end of the chassis main frame through the balance weight rotating mechanism, the load-bearing operation base table is located on the mounting plate, and the gravity center adjusting mechanism is located on the mounting plate and is used for adjusting gravity centers of components on the mounting plate. The front driving mechanisms and the rear driving mechanisms comprise driving wheels and driving parts, and the driving wheels make contact with the tower frame and are driven by the driving parts to rotate so that the chassis main frame can walk up and down on the tower frame. The tower climbing chassis platform has the advantages of simple and compact structure, safe and reliable walking and the like.

The invention discloses an automatic routing inspection system for chemical engineering equipment. The automatic routing inspection system comprises a routing inspection instrument and an electronic label of equipment, wherein the routing inspection instrument communicates with a server of a management center through a wireless network and comprises a display screen and a key; the output end of the key is connected with a controller; the output end of the controller is connected with the display screen; the input end of the controller is connected with a reader for reading information of the electronic label and an acquirer for acquiring data; the controller communicates with a camera, a communication module and a memory respectively through an SPI (single program initiation) general line protocol. The system disclosed by the invention can better guarantees the safety of chemical engineering production and improve the specification of the routing inspection work and the scientific management level and is favorable for promotion of effective execution of routing inspection.

The invention discloses an oil level monitoring and oil recharging device for a gear box of a cooling tower, belongs to the field of common large cooling tower equipment, and specifically relates to an oil level monitoring and oil recharging device of a cooling fan gear box for a large counter flow cooling tower. The oil level monitoring and oil recharging device is characterized in that the oil level monitoring and oil recharging device is mounted in an inspection channel at the top of the cooling tower and comprises an oil pipe (9), an oil cup (7) and a fixing bracket (8), wherein the oil cup (7) and the oil pipe (9) are mounted through the fixing bracket (8); and one end of the oil pipe (9) is communicated with an oil outlet of the oil cup (7), while the other end of the oil pipe (9) is communicated with an oil drain hole (403) of the gear box (4) of the cooling tower. The principle that liquid levels of two communicated appliances are equal is ingeniously utilized, a maintenance worker can judge the height of the liquid level of an operating oil level in the gear box by observing the liquid level of the oil level in the oil cup and can safely and conveniently lubricate and maintain the gear box, the gear box is not required to halt no matter whether monitoring or oil recharging is performed, the normal operation of the device is not influenced, and the production efficiency and the production schedule are not influenced.

The invention relates to an inspection system used for a power convertor station. The inspection system comprises a vehicle body with a first cavity and a shell; the vehicle body is provided with a first electromagnetic shielding layer and a first shielding door used for workers to access the first cavity; the first electromagnetic shielding layer is used for electromagnetic shielding of the first cavity; the shell is installed in the power converter station; the shell comprises a second cavity; the shell is provided with a second electromagnetic shielding layer and a second shielding door used for the workers to access the second cavity; the second electromagnetic shielding layer is used for electromagnetic shielding of the second cavity; and the shell is connected with a shielding part used for shielding the vehicle body. As the first electromagnetic shielding layer is used for electromagnetic shielding of the first cavity and the second electromagnetic shielding layer is used for electromagnetic shielding of the second cavity, the workers do not need to wear thick and heavy shielding clothes in the first cavity or the second cavity and can carry out inspection work conveniently; and the health of the workers is also protected.