41results about How to "Safe and convenient maintenance" patented technology

The invention discloses a rotary kiln dry distillation powder semi coke dry quenching and afterheat utilizing device and belongs to the field of semi coke processing devices. A high-temperature discharging valve (10) is arranged on the lower end of each discharge tube (11) of the rotary kiln (12), a high temperature resistant scraper conveyer (9) is arranged on the lower end of each high-temperature discharging valve (10), and a plurality of discharge holes (902) are formed at the bottom of the high temperature resistant scraper conveyer (9); the lower end of each discharge hole (902) is respectively and tightly connected with a spiral gate (8), a distributing device (7), a heat exchanger (6), a water cooling jacket (5) and a discharge valve (3); a conveyor (1) is arranged on the lower part of one row of discharge valves (3), and a material level detector (13) is arranged on the distributing device (7) or the heat exchanger (6) on the tail end. By adopting the device, the dry distilled semi coke in the rotary kiln can be dry-quenched and steam can be produced through semi coke sensible heat; the device has the advantages of large processing volume, low manufacture cost, reliability in operation, convenience in overhaul, and the like.

The invention provides a separated type switch socket. The separated type switch socket comprises a wiring bottom box and a panel. The wiring bottom box comprises a wiring base and an installing support installed in the wiring base. The wiring base is of a hollow structure. The inner wall of the hollow structure is provided with at least two inserting grooves. Metal contact bodies are hidden in the inserting grooves respectively and are electrically connected with two base wiring ends respectively. The panel comprises a back base connected with an on / off button or a socket hole. The outer side of the back base is provided with at least two exposed metal protruding bodies. The periphery of the on / off button or the periphery of the socket hole is sleeved with an insulation frame. The metal protruding bodies are inserted into the inserting grooves and electrically connected with the metal contact bodies. According to the separated type switch socket, the switch panel or the socket panel is separated from a power supply circuit, and the switch panel or the socket panel can be replaced and maintained safely and conveniently without any tool.

The invention discloses a high-voltage DC power supply system and a control method of a high-voltage DC power supply system. The high-voltage DC power supply system comprises a photovoltaic high-voltage component string; bypass switches connected with positive and negative electrodes of photovoltaic components or connected with positive and negative electrodes of the photovoltaic component string;a DC output control device comprising a DC circuit breaker that is connected with a positive and / or negative electrode of the photovoltaic high-voltage component string; an inverter station that converts a high-voltage DC into an AC; and a DC power transmission line having one end connected to an output end of the DC circuit breaker and the other end connected to an input end of the inverter station. Through the cooperation of the bypass switches and the DC output control device, the system of the invention solves the technical obstacles that the high-voltage DC side switch of a photovoltaicpower station cannot be opened due to the arc-quenching problem, improves the relay protection measures of the DC photovoltaic power station, and makes an electrical system run more securely and reliably.

The invention discloses a double-drive counterweight high-speed stacking machine, and aims to reduce energy consumption and facilitate mounting and maintenance of a counterweight. The double-drive counterweight high-speed stacking machine comprises a lifting system, the counterweight, a counterweight adjusting device, an upright post, linear guide rails, a sliding block, a lower cross beam, a cargo carrying table, a fork, an active travelling system and a driven travelling system, wherein the lifting system comprises a lifting gear motor, a synchronous belt, synchronous pulleys and a lifting bracket; the synchronous pulleys mesh with the synchronous belt; the linear guide rails are mounted on the two sides of the upright post; the active travelling system comprises a driving wheel box, a gear drive wheel train, travelling wheels and a travelling gear motor; the travelling wheels and the gear drive wheel train are mounted in the driving wheel box; the driven travelling system comprises a driven wheel box and driven wheels; the driven wheels are mounted in the driven wheel box; a lower cross beam hinge lug ring, an upright post mounting plate and a driven wheel box mounting plate are arranged on the lower cross beam; the counterweight adjusting device comprises a hinge pin, a fixed block and an adjusting bolt; the fixed block is mounted on the upright post of the stacking machine; and the hinge pin is connected with the fixed block and the counterweight.

A commercial riding mower with a chassis built on a relatively rigid frame and having a number of operating systems such as the power plant, motive system, cutter drive system, and fuel storage and delivery system, each of which is accessible through a swing away panel, or hatch, for easy maintenance and repair without compromising safety of the operator or anyone in close proximity to the mower in operation, or impairing the structural integrity of the mower.

A ceiling fan easy for maintenance includes a motor housing, which is formed with an accommodating space having a motor provided therein. The motor is connected with a blade unit, and a switch box is provided beneath the blade unit and received therein with a driver, which is electrically connected with the motor. By so designing, in case the driver causes trouble and damage and need to be repaired, a maintenance man only need to open the switch box beneath the motor housing and the blade unit to carry out maintenance and dose not need to disassemble the motor housing. Thus, when doing maintenance work at altitude, the maintenance man can keep away from the blade unit of the ceiling fan, thus able to carry out maintenance of the ceiling fan with great safety and convenience.

The invention relates to a catalytic hydrogenation deoxygenation apparatus for a nuclear power station. The apparatus comprises a pedestal, a mixer, a resin deoxygenation tank, a resin trapper and a degassing tank, the mixer, the resin deoxygenation tank, the resin trapper and the degassing tank are respectively fixed on the pedestal, the mixer is connected with a water inlet pipe and a hydrongeation pipe, the water outlet of the mixer is connected with the water inlet of the resin deoxygenation tank, the water outlet of the resin deoxygenation tank is connected with the water inlet of the resin trapper, the bottom of the resin trapper is connected with a water outlet valve and a circulation valve through the water outlet pipe, the water outlet pipe is provided with a dissolved oxygen analyzer, the top of the resin deoxygenation tank and the top of the resin trapper are connected with the degassing tank through exhaust pipes, the top of the degassing tank is provided with a gas outlet, and the wind outlet of a fan is connected with the degassing tank. The catalytic hydrogenation deoxygenation apparatus is integrated on a pedestal, is debugged and then is integrally conveyed to a site, so the apparatus is safe and convenient to install, debug, use and repair.

The invention discloses a novel elevator cab top maintenance safety protection device which structurally comprises a safety operating system, a safety shoe switch, a door fan, a portal sill, a touchpanel connecting rod, a safety touch panel, a door vane, four door pulleys, a door machine guide rail and two auxiliary rods. The two auxiliary rods are horizontally welded at the left end and the right end of the safety operating system, the door machine guide rail is fixedly welded at the top of the front end of the safety operating system and in reinforcement connection with the safety operating system through a bolt, and the four door pulleys are horizontally embedded into the front end of the door machine guide rail. According to the device, when an elevator needs to be maintained by a maintainer, an elevator traction machine stops working by the aid of the switch, the safety operating system stops running, a first lifting rod drives a braking arm, brakes clamp the auxiliary rods, sothat the safety operating system stays on the auxiliary rods, sliding risks of the elevator are prevented, personal safety of an on-site maintainer is protected, maintenance of the maintainer is facilitated, and trouble and labor are saved.

The invention discloses a flue gas backward-flow preventing coal feeding device of a CFB boiler and a flue gas backward-flow preventing method of the device, and belongs to the technical fields of coal feeding devices, and aims at solving the problems of overhaul inconvenience and environment pollution caused by flue gas backward flowing and operation difficulty caused by in-furnace negative pressure suction during the shutdown of the conventional coal feeder. The process of the flue gas backward-flow preventing coal feeding device is as follows: a, when a coal feeder operates normally, a gate valve is opened, an isolating valve is closed, the fire coal passes through a belt, a scraper coal feeder and a Venturi coal falling pipe in sequence and then falls to a material returning leg of a material returning device, and the fire coal and recycle materials at the bottom outlet of a cyclone separator together enter the hearth; b, when the coal feeder is shutdown and overhauled, the gate valve is closed, the isolating valve is opened, sealing air in a sealing air pipe forms a downward inclined jet flow through a dip angle alpha formed between the air outlet of the sealing air pipe and the wall surface of the straight pipe section, above the contraction section, of the Venturi coal falling pipe; c, through the suction force of the Venturi coal falling pipe, the downward inclined jet flow formed by the sealing air is sucked to the material returning leg of the material returning device and the hearth. The flue gas backward-flow preventing coal feeding device is convenient to operate and maintain and low in investment, and can be used for effectively solving the problems of flue gas backward flowing, device corrosion, overhaul and operation difficulty and environment pollution during the shutdown of the coal feeder.

The invention discloses a hydraulic driving modular pump fracturing sled. The hydraulic driving modular pump fracturing sled comprises a power sled and a fracturing pump sled, a main engine and an auxiliary engine are arranged on the power sled, the auxiliary engine is connected with the hydraulic pump of a hydraulic system I in a transmission mode, one oil circuit of the hydraulic system I is connected with the driving motor of a heat sink I, and the other oil circuit of the hydraulic system I is connected with the starting motor of the main engine; a gearbox is arranged on the fracturing pump sled, the main engine is connected with the input end of the gearbox in a transmission mode through a transmission shaft, a plurality of corner boxes in series are connected to the output end of thegearbox in a transmission mode through a universal shaft and a clutch in sequence, the corner boxes are connected with a plurality of hydraulic pump sets in series in a transmission mode, the hydraulic pump sets are connected with modular pumps in a transmission mode, the multiple modular pumps are arranged in parallel on the lower middle portion of the fracturing pump sled, the multiple modularpumps are in connection by means of an integral connecting frame, and integral output blocks are connected to the discharge ends of the modular pumps. The problem is solved that in the prior art, themaintenance cost is high.

The invention belongs to the technical field of anti-corrosive coatings, and particularly relates to an anti-corrosive coating for concrete surface and a preparation method thereof. The anti-corrosive coating for concrete surface is divided into a base coating and a surface coating, wherein the base coating is composed of a first component and a second component, the surface coating is composed of a component A and a component B; the first component and the component B both use epoxy resin as a base material; the second component and the component B are respectively composed of a curing agent and a curing promoter. While in use, the first component and the second component are uniformly mixed according to a proportion to obtain the base coating; and the component A and the component B are uniformly mixed according to proportion to obtain the surface coating. Compared with the prior art, the anti-corrosive coating for concrete surface has features of stable performance, strong adhesion, long service life, good corrosion prevention effect, green environmental protection, good decorative effect and simple production process, and can be used in highway bridges, offshore structures, factory buildings or the like. After the anti-corrosive coating is coated once, the high temperature resistance, the acid and alkaline corrosion resistance, and the service life are greatly improved.

The invention discloses an auxiliary carrying device for office supplies. The auxiliary carrying device comprises a variable-node handle device. A vehicle handle is arranged at the upper end of the variable-node handle device. A protective sleeve is arranged at the lower end of the variable-node handle device. A movable frame is arranged at the lower end of the protective sleeve. A carrying panelis arranged at the lower end of the movable frame. A transverse plate is arranged at the lower end of the carrying panel. The auxiliary carrying device for the office supplies is provided with the variable-node handle device and a walking wheel device. The variable-node handle device can be changed to facilitate carrying operation in a narrow space, and is telescopic and foldable. The auxiliary carrying device is simple in structure, low in cost, simple, convenient and safe. The walking wheel device can make carrying efficient, fast and convenient. Carrying can be conveniently implemented on jolting terrain and during go upstairs and downstairs. The situation that furniture slides off due to bumping in the moving process of the carrying device is prevented. The automation level is improved. The working efficiency is high. The operation is convenient.

The invention provides a bogie replacing device. The bogie replacing device comprises a first bearing part for bearing a bogie, two supporting columns arranged oppositely and a first cross beam erected on the two supporting columns, wherein a vehicle body supporting assembly for supporting a vehicle body is arranged on the first cross beam; and bogie lifting assemblies for lifting and dropping thefirst bearing part are arranged on the supporting columns. The bogie replacing device has the beneficial effects that the bogie replacing device has relatively good integrity and is extremely convenient to install and dismantle by arranging the vehicle body supporting assembly and the bogie lifting assemblies on the first cross beam and the supporting columns; in addition, as parts of the device,which need to be frequently overhauled and maintained, are mainly positioned above the ground, the bogie replacing device is safe and convenient to overhaul and maintain, the influence of undergroundhumid environments on the device can be avoided, and the reliability of the device is improved.

The invention relates to a bagged cement automatic bag-opening and discharging device for a nuclear power station. The bagged cement automatic bag-opening and discharging device for the nuclear power station comprises a sealing box, a conveying mechanism, a controller and a starting button. The bagged cement automatic bag-opening and discharging device for the nuclear power station is characterized by comprising a vertical lifting door, a cement bag recycling door and a cement exit. A cutting knife is fixed on the inner surface of the vertical lifting door, and the vertical lifting door is driven by a dynamic mechanism. An unpowered roller way and a belt conveying machine are respectively arranged inside and outside the vertical lifting door, and a guide rail is arranged on the upper portion of an outer shell. A motor can move on the guide rail through that a steel wire rope drags a bag-grabbing mechanism. A fine dust collecting machine is arranged on the top of the outer shell, signal input ends of the controller are respectively connected with signal output ends of a photoelectric sensor, a limiting switch and the starting button. Output ends of the controller are respectively connected with control ends of the belt conveying machine, the dynamic mechanism and the motor. The bagged cement automatic bag-opening and discharging device for the nuclear power station is simple in structure, low in cost, small in size, reliable in sealing, safe and convenient to use and maintain, and capable of meeting requirements for environmental protection of the nuclear power station.

The invention discloses a cable connection auxiliary apparatus. The cable connection auxiliary apparatus comprises a power-supply-end cable and a power-utilization-end cable which are electrically connected through a cable plug, wherein a cable bearing bracket is arranged at the power-utilization equipment end connected with the power-utilization-end cable; a clamping and fixing apparatus used for fixing the power-supply-end cable is arranged at the outer end of the cable bearing bracket; the cable bearing bracket is equipped with an anti-falling-off transitional auxiliary lifting hook; the power-supply-end cable is provided with an anti-falling-off transitional connection rope connected with the transitional auxiliary lifting hook; and the power-supply-end cable is also provided with a pulling force sensor used for monitoring the state of cable. The cable connection auxiliary apparatus is provided with the clamping and fixing apparatus used for fixing the power-supply-end cable, so that the problem existing in the safe connection of the connecting parts of the cable is solved; meanwhile, for realizing convenient connection and replacement and maintenance of the cable, a transitional connection apparatus consisting of the transitional connection rope and the transitional auxiliary lifting hook is arranged between the connecting parts, so that the connection and the maintenance of the cable becomes safer and more convenient; and in addition, the clamping and fixing apparatus can prevent the cable from being damaged, and fixation requirements of multiple kinds of different cables can be satisfied as well.

The invention relates to a cable plug which is made of a full ceramic or full glass material, formed by combining equal parts of 1 / 2 or 1 / 3 single bodies into a whole, and shaped as a conical sleeve with a T head, wherein the outer diameter R1 of the conical sleeve is slightly smaller than the inner diameter of a protective tube; the inner diameter R2 of the conical sleeve is slightly greater than the diameter of the cable; the outer diameter R3 of the T head is slightly greater than the outer diameter of the protective tube; and a cone angle b is 5-15 degrees. The cable plug can be used for performing fire prevention, preventing fire from spreading after firing, preventing small animals from burrowing into the protective tube to further bite the insulating layer of the cable, and preventing rain erosion and preventing the fixed cable from shaking in the protective tube, a wall body and equipment. The cable plug can be widely applied to parts which are needed to be protected by the protective tube or neccessarily penetrates through the wall body and neccessarily enters into equipment such as a high-voltage switch cabinet, a low-voltage switch cabinet and a control cabinet so as to be plugged in the fields of electric power, communication, televisions and broadcasting.

The invention discloses a mechanical interlocking operation device for a cable branch box, which relates to the technical field of manufacturing of high-voltage electrical equipment. The mechanical interlocking operation device comprises an outer box, a switch cabinet in which a load switch and a load switch operation mechanism are installed, a switch operation shaft arranged on the operation mechanism, a door lock arranged on the outer box, as well as an upper lock rod and a lower lock rod which are connected with the door lock, wherein the operation shaft is movably connected with a switch cabinet mechanical lock arranged in the switch cabinet, and the switch cabinet mechanical lock is movably connected with a mechanical lock key; the mechanical lock key is movably connected with a branch box mechanical lock installed on the outer box; the branch box mechanical lock is connected with the door lock; the upper lock rod and the lower lock rod are connected with a top rod respectively; the upper lock rod and the lower lock rod are further movably connected with a lock clamp arranged on a box body of the outer box. The mechanical interlocking operation device is capable of solving the problems of high production cost, and difficulty in installation and operation, of the cable branch box while meeting five-prevention requirements.

The invention discloses a cable pulling force buffering apparatus for engineering machinery. The cable pulling force buffering apparatus comprises a power-supply cable and a power-utilization cable which are connected through a plug, wherein the power-supply cable is provided with a clamping and fixing apparatus; the clamping and fixing apparatus is in tensioning connection with power-utilization equipment through an elastic connecting line; and the power-utilization cable is connected with power-utilization equipment in a tension-free manner. According to the cable pulling force buffering apparatus provided by the invention, the cable is fixedly connected through the clamping and fixing apparatus; the clamping and fixing apparatus is in tensioning connection with power-utilization equipment through the elastic connecting line to be fixed, so that the problem existing in the safe connection of the cable is solved; meanwhile, for realizing safer and more convenient connection and maintenance of the cable, a cable connecting supporting column is arranged on the power-utilization equipment, and a rotatable and foldable rigid connecting rod is further provided; meanwhile, a pulling force sensor which is arranged along the elastic connecting line can be used for monitoring the connection condition of the cable at any time; the clamping and fixing apparatus provided by the invention adopts a two-piece type clamping bracket with a rotary shaft open-close structure; replaceable elastic clamping and fixing claws are arranged, so that the cable is prevented from being damaged in the clamping and fixing operation; and the fixation requirements of multiple kinds of different cables can be satisfied as well.

The invention discloses a high-efficiency water saving device. The high-efficiency water saving device is technically characterized in that a middle water feeding pipe is provided with a minitype pipeline pump, and a bracket of a weepage pull rod in an elevated water tank is provided with a timing start switch which is corresponding to the minitype pipeline pump; a horizontal pipeline which is connected with a middle water storage tank and the middle water feeding pipe is provided with a liquid level switch, a middle control switch is additionally arranged and is connected in series with the minitype pipeline pump, the timing start switch and the liquid level switch; a middle water drainage pump is additionally arranged and is arranged on a line in parallel, the middle water drainage pump derives the water in the middle water storage tank in time; and the bottom of a water pool or a washbowl is provided with two drainage holes, turn-cover hourglass formed by combining two semicircles together is arranged above the two drainage holes and is used for realizing automotive shunting, the lower part of one drainage hole is connected with a wall row, and the other drainage hole is connected with an inner row. The high-efficiency water saving device provided by the invention has the advantages of low manufacturing cost, high efficiency, water conservation, wide application range, and capability of meeting commonage.

The invention discloses a sealing performance tester for detecting a glass cup. The sealing performance tester comprises a plug; a plug cover is arranged at the lower end of the plug; a vent pipe is arranged at the upper end of the plug cover; water flow sealing devices are arranged at the lower end of the plug cover; an outgoing pressure distributing disc is arranged at the lower ends of the water flow sealing devices; a middle guide pipe is arranged at the lower end of the outgoing pressure distributing disc; and an air flow sealing device is arranged at the lower end of the middle guide pipe. The sealing performance tester for detecting the glass cup of the invention is provided with the air flow sealing device and the water flow sealing devices. The air flow sealing device is simple instructure and easy and convenient to operate, and the problem that an existing sealing performance tester is affected by a sealing performance test result in a common working environment can be solved. The water flow sealing devices enable high efficiency and rapidness; sample mounting grooves are formed in the water flow sealing devices, so that the edges of samples to be tested can be observed.The sealing performance tester for detecting the glass cup has the advantages of direct and effective detection, convenience in observation, simple and convenient operation and convenience, and safety and reliability in crushing, and can assist in greatly improving production efficiency.