96results about How to "Realize automatic stop" patented technology

The invention relates to a welding device, in particular to an automatic petroleum pipeline circular seam welding device. The automatic petroleum pipeline circular seam welding device comprises a pipeline clamping system, a power and control system, a welding gun clamping system and a welding gun. The pipeline clamping system is installed on a petroleum pipeline, the power and control system is installed on the pipeline clamping system, the welding gun clamping system is installed on the power and control system, and the welding gun is installed on the welding gun clamping system. The automatic petroleum pipeline circular seam welding device is directly installed on the petroleum pipeline in need of welding, the welding gun is driven to act through gear transmission so as to complete the circular seam welding process. The automatic petroleum pipeline circular seam welding device has the advantages of being simple and compact in structure, small in size, low in cost and high in automated degree. Welding can be stopped automatically through a contact type travel switch when a half circle is welded, the welding process is divided into two steps and completed through welding of the two half circles, and thus welding quality is improved. Spiral transmission is adopted for the welding gun clamping system to adjust the position of the welding gun, the distance between the welding gun and the petroleum pipeline can be adjusted precisely, and the welding quality of a circular seam is further improved.

The invention discloses an intelligent express package access cabinet, comprising a cabinet body for storing the express packages; a central control system is arranged in the cabinet body; the central control system comprises a storage control module, a bar code scanning module, a verification code transmission module and a package picking up control module; the cabinet body is provided with a package storage port and a package picking up port; the cabinet body is internally provided with a storage compartment movement shelf; a plurality of storage compartments which are in communication with the package storage port are arranged in the storage compartment movement shelf; the storage compartment is provided with a push rod for pushing the stored article out; the outside of the storage compartment movement shelf is provided with a storage article delivering sliding groove; and the bottom of the storage article delivering sliding groove is arranged at the package picking up port. The invention adopts the control system to cooperate with the mechanical transmission system, realizes the storage and picking up of the express packages, has high reliability, high storage utilization rate and high efficiency of picking up, and provides convenience. Furthermore, the invention can solve the problems that the similar product on the market occupies the large area and stores less packages.

The invention discloses an automatic coal dredging device for a raw coal conveying system in a thermal power plant. The automatic coal dredging device comprises a plurality of air jet holes and an air supply system, the air jet holes are formed in the inner wall of a raw coal conveying system device, the air supply system is communicated with the air jet holes through air pipelines, and the operating state of the air supply system is changed by a control system. The automatic coal dredging device is simple in structure, convenient to operate, low in cost, high in economic performance and safe and reliable in operation, less vibration is generated, and normal operation of other devices cannot be affected. By the aid of the automatic coal dredging device, the problem of coal blockage failure due to various reasons is fundamentally and thoroughly solved, and normal coal supply of a coal feeder and normal operation of a subsequent device are ensured.

The invention discloses an intelligent clothes drying machine and method. The intelligent clothes drying machine comprises a main body, a fan, a heating device, a clothes hanger and a humidity detector. The main body is a columnar space defined by a side wall, an upper cover and a base plate. The clothes hanger is arranged in the main body and connected to the center of the upper cover of the main body through a connecting shaft, the inner side wall of the main body is provided with the humidity detector, two symmetric side walls of the main body are provided with two symmetric through holes, the heating device is arranged on the through hole in the inner side of the main body, and the fan is arranged on the through hole in the outer side of the main body. According to the intelligent clothes drying machine, the fan and the heating device are arranged on the side of the main body, and short-circuit conditions caused by water dripping from clothes are effectively avoided by combination with a partition and a flow guide plate. An exhaust fan can accelerate gas flow in the main body, a low-speed motor drives the clothes hanger to rotate, so that the clothes are in all-dimensional contact with hot air moving at a high speed, and drying efficiency is high.

The invention relates to a marine incinerator system, pertaining to the technical fields of incineration, marine automatic control and environment. The invention comprises an incinerator body, a burner, a control box, a fuel storage tank, a dirty oil storage tank, an exhaust fan, an air shutter, a dirty-oil variable delivery pump, a dirty oil circulating pump, a fuel-oil booster pump, a valve, a temperature and pressure sensor and an electric heater. The control system has a simple structure and the production cost is low; the effective incineration of both solid marine wastes and dirty marine oil and mud is ensured, and the solid marine wastes and dirty marine oil and mud can be processed effectively. The incinerator can realize automatic control during the process of operation, the operation is stable and reliable; the waste processing efficiency is high; little hazardous gas is produced during the process of incineration, the environmental pollution is reduced during the process of waste treatment; in addition, the invention can also well resolve the problems of waste stacking and dirty oil and mud placement on ocean-going vessels.

The invention discloses a control device for a food waste processor and a control method of the control device. The control device comprises a food waste processor body, wherein the food waste processor body is of a hollow structure; a PLC (Programmable Logic Controller) is arranged on one end of the food waste processor body, and comprises a timer, a display device, control keys and a control chip; the timer, the display device and the control keys are all electrically connected with the control chip; a feed hopper is arranged on one side of the PLC, and extends into the food waste processor body; an infrared detector is arranged in one end, close to the food waste processor body, of the feed hopper; a sliding cover plate is arranged on the bottom part of the feed hopper. According to the control device for the food waste processor and the control method of the control device, disclosed by the invention, a pressure pump and a clean shower are controlled through the control chip so as to clean a smashing tool set, so that the service time of the tool set is prolonged, the control chip reminds a user of replacing a cleaning box through a pressure sensor, the automation degree of the whole device is improved, and the requirements of modern intelligent household electrical appliances are met.

The invention discloses a touch type intelligent cabinet control system which comprises a cabinet box body, a tray base, a dragging assembly, a control circuit board, lifting rails, a static touch strip, gravity sensors, traction steel wires and an ultraviolet sterilizing lamp. The cabinet box body is provided with a dragging box, a cabinet, a lifting cabinet and a cabinet panel with a touch display screen. The dragging assembly comprises a dragging motor, a descending stop assembly and steel wire locking parts. A control circuit board is arranged in a dragging chamber. A pulley and the gravity sensor are connected to a steel wire rope through threads. A top plate of the cabinet is provided with an ascending halt assembly. The steel wire clamping parts is welded and fixed to the traction steel wire. The steel wire clamping parts are fixedly connected with the tray base through the traction steel wires. The lifting rails are arranged on the side face of the cabinet and are in sliding clamping connection with the lifting cabinet. The touch type intelligent cabinet control system can freely stop and start through touch, the intelligence degree is high, use is convenient, safety is high, special and automatic stop is achieved, sanitary sterilization can be intelligently set, and old people and children can operate the cabinet conveniently.

The invention discloses an automatic detection system for a following driving signal lamp. The automatic detection system comprises a following car, a car networking system and a signal lamp system. The following car comprises a control device, a locating device, a wireless signal transmitting device, a braking system and a starting system. The locating device, a signal receiving device, the braking system and the starting system are respectively connected to the control device. The wireless signal transmitting device of the following car is connected with the car networking system through a wireless network. The signal lamp system is connected with the car networking system through a network. The automatic detection system has the advantages that the state of a signal lamp on an intersection can be automatically detected, the car stops automatically when a red light is lighted, the order of traffic is guaranteed, and the traffic safety is guaranteed.

The invention discloses an automatic strip winding machine. The automatic strip winding machine comprises a machine base, and a first pressing roller, a feeding device and a winding device arranged onthe machine base, wherein the first pressing roller is used for pressing a strip sent to the feeding device, and the feeding device defines strip feeding width and flattens the strip; the winding device comprises a driving device, a swing rod speed regulating mechanism, an expansion and contraction receiving roller and a second pressing roller; and the driving device drives the expansion and contraction receiving roller to rotate, the pressing end of the second pressing roller is in contact with the expansion and contraction receiving roller, and the second pressing roller is connected with the driving device through the swing rod speed regulating mechanism. With the increase of the overall diameter of the expansion and contraction receiving roller after the winding of the strip, the second pressing roller moves towards the side far away from the expansion and contraction receiving roller so as to drive the swing rod speed regulating mechanism to move, the driving speed of the drivingdevice is controlled through the movement of the swing rod speed regulating mechanism, then the automatic regulation of the winding speed and the automatic stop after the winding are realized, the automation degree is high, the structure is simple, each component is low in cost, and the automatic strip winding machine is suitable for popularization.

The invention provides a thermal power plant industrial cooling water system and a start and close control method thereof. The system comprises an industrial water pool, a first industrial cooling water pump, a second industrial cooling water pump, a third industrial cooling water pump, a first condensate pump cooler, a second condensate pump cooler, a third condensate pump cooler, a sealing oil vacuum pump cooler, an air compressor cooler, a first water feed pump booster pump cooler, a second water feed pump booster pump cooler, a first start furnace water feed pump cooler, a second start furnace water feed pump cooler, a furnace water circulation pump cooler, a water replenishing electric door, a water replenishing regulating valve, a recirculation regulating valve, a water supply main pipe electric door, a water supply main pipe exhausting electric door and a back water main pipe electric door. According to the thermal power plant industrial cooling water system and the start and close control method thereof, in the condition that the industrial cooling water system is fully closed, the industrial cooling water system is automatically started; in the condition that the industrial cooling water system operates, the industrial cooling water system is automatically closed; and human judgment is taken into account, and leapfrog operation of the programmed logic of the industrial cooling water system is achieved.

The invention relates to a device for automatically tightening nuts of a connecting box. A first locating plate, a second locating plate and a motor are vertically fixed to a base. The first locating plate and the second locating plate are provided with two sets of first notches and second notches. A cable shaft for allowing a cable to be placed on is erected between each set of first notch and second notch, and the cable shaft can rotate relative to the first notch and the second notch. A cable shaft gear is arranged on the external diameter of each cable shaft in the circumferential direction. An output shaft of the motor penetrates through the first locating plate and is connected with the cable shaft gears through transmission gears. The transmission gears comprise the a first gear and the second gear, and the first gear and the second gear are axially arranged side by side. The first gear is connected with the output shaft of the motor, and the second gear is meshed with the cable shaft gears. One side of the first gear is provided with more than one ball screw. The second gear is provided with a concave pit. The ball screw can slide into the concave pit or retract out of the concave pit. The device special for automatically tightening the nuts of the connecting box improves the installation efficiency and reduces the defective rate.

The invention discloses a winding system of a textile machine. The system comprises a body structure part and a control module. A bottom plate is located at the lowermost end. A servo motor is installed at the left end of the bottom plate and connected with a coupler. Fixing frames are vertically distributed on the bottom plate. Rolling bearings are installed at the upper ends of the fixing frames. A coiling block is installed at the upper ends of the fixing frames and parallel to the bottom plate. A distance sensor is installed at the lower end of the coiling block. The distance sensor is fixed through a supporting frame. A microprocessor and an execution element are distributed in a controller. A metal lead is used for connecting the distance sensor and the microprocessor. The microprocessor is connected with the execution element. The diameter of the coiling block is monitored by additionally arranging the distance sensor, the coiling block can automatically stop by additionally arranging the microprocessor and the execution element, and finally the equipment power is provided by additionally arranging the servo motor.

The invention provides a closed-type cooling system for a fuel gas thermal power plant, and a starting / stopping control method for the closed-type cooling system. The method comprises the steps: the starting of a closed-water type utility system, the selecting of units, the starting of operation, and the stopping of the system. The method needs to judge whether the pressure of a demineralized water mother tube is greater than 0.2MPa or not, whether a closed-type circulating water pump is pre-selected or not and whether a 2GT+1ST closed-type cooling water system or a 1GT+1ST closed-type cooling water system is pre-selected or not before the step of the starting of the closed-water type utility system. If the pressure of the demineralized water mother tube is greater than 0.2MPa, the closed-type circulating water pump is pre-selected and the 2GT+1ST closed-type cooling water system or the 1GT+1ST closed-type cooling water system is pre-selected, the step of the starting of the closed-water type utility system is carried out. According to the invention, the method can achieve the automatic starting of the closed-type cooling water systems during the complete stopping or partial starting of the closed-type cooling water systems, and does not affect an original operation state during the partial starting. The method achieves the automatic stopping of the closed-type cooling water systems in an operation state.

A full-automatic frequency conversion energy-saving escalator relates to the technical field of escalators and comprises infrared sensors arranged at the entrance position and the exit position of an escalator. The infrared sensors are used for detecting whether people are nearby. When passengers pass through or approach the infrared sensors, micro heat of human bodies is received by the sensors, and the infrared sensors send signals to report to a system. The infrared sensors are connected with a variable frequency governor through a control circuit. The control circuit receives the states of the infrared sensors and indicates the variable frequency governor to work. The variable frequency governor is used for adjusting the rotation speed of the escalator, starting the escalator and controlling the escalator to operate stably. When nobody passes, the system is converted into climbing operation through delaying automatically so as to achieve the purpose of saving energy. When the passengers exist, the escalator is subjected to frequency control to reach rated speed. When all the passengers leave the escalator, the escalator enters a low speed operation state to wait for the passengers automatically. Energy is saved, and mechanical abrasion is reduced.

The invention provides a fuel gas thermal power plant gland seal and vacuum system and a start-stop control method thereof. The fuel gas thermal power plant shaft seal and vacuum system comprises a vacuum system and a gland seal system; the vacuum system comprises a first vacuum pump system, a second vacuum pump system and a third vacuum pump system; each vacuum pump system comprises a steam separator, a water ring vacuum pump, a plate heat exchanger, a vacuum pumping pipeline, a water replenishing pipeline, a heat exchanging pipeline, a vacuum pump inlet pneumatic door, a vacuum pump water replenishing electromagnetic valve, a vacuum pump water replenishing bypass hand valve, a vacuum pump water replenishing main gate, a vacuum pump filter screen inlet hand gate, a vacuum pump inlet filter screen and a vacuum pump filter screen outlet hand gate. By means of the fuel gas thermal power plant gland seal and vacuum system and the start-stop control method thereof, the automatic start of the plant gland seal and vacuum system can be achieved, and the automatic stop of the plant gland seal and vacuum system is achieved in an operation state; under the state that the fuel gas thermal plant gland seal and vacuum system is partially started, the automatic start of the gland seal and vacuum system is achieved, and an original operation state is not interfered.

The invention provides a heat-engine plant boiler air and flue system and a start-stop control method thereof. The system comprises a first air pre-heater, a second air pre-heater, a first air feeder, a second air feeder, a first induced draft fan, a second induced draft fan, an air feeder outlet mother tube interconnection valve and a plurality of pipes. The air feeders are connected with the air pre-heaters through the pipes, inlets of the air feeders are provided with inlet guide blades, and outlets of the air feeders are provided with outlet electric doors; the air pre-heaters are connected with a boiler hearth through two passages of pipes, one of the pipes is provided with an air pre-heater outlet electric door, and the other pipe is provided with an air pre-heater inlet electric door; the induced draft fans are arranged on the pipes through which the air pre-heaters are connected to a smoke tower, the two ends of the induced draft fans are provided with inlet electric doors and outlet electric doors correspondingly, and inlets of the induced draft fans are furthermore provided with induced draft fans inlet guide blades; and an outlet motor tube of the first induced draft fan communicates with an outlet motor tube of the second induced draft fan through the air feeder outlet mother tube interconnection valve.

The invention discloses an automatic working platform vertical-lifting device and a control method thereof. The automatic working platform vertical-lifting device comprises an interaction display unit, a controller, a boom state monitoring unit and an executing mechanism, wherein the interaction display unit is used for inputting ascending or descending distance parameters of a working platform and transmitting the distance parameters to the controller, and is capable of displaying boom states in real time; the boom state monitoring unit is used for monitoring length and angle information of a boom and transmitting the length and angle information to the controller; and the controller automatically starts ascending or descending action according to the distance parameters and controls the executing mechanism to drive a boom structure to complete the corresponding action through a hydraulic executing element. Amplitude errors and the amplitude error changing rate are calculated in real time, extensible valve current is obtained by inquiring a fuzzy control rule table, it is guaranteed that the amplitude change in the lifting process is as small as possible, and control precision is improved; and the boom is controlled to vertically ascend and descend through a method that an amplitude change valve current value is kept constant and an extensible valve current value is adjusted, the control quantity is reduced, and rescue work efficiency is improved.

The embodiment of the invention discloses a voice acquisition automatic stop method and device, terminal equipment and a storage medium. The method comprises the steps of displaying a text corpus, wherein the text corpus is used for voice testing; receiving a starting instruction, wherein the starting instruction is used for triggering acquisition to obtain audio data for voice testing; extractingfrequency characteristics of the acquired audio data; and when the frequency characteristics meet a preset characteristic model or the collected audio data reach the corresponding duration of the text corpus, stopping collecting the audio data. A testee or a worker participating in evaluation do not need to manually control the voice acquisition process after the test is started, the interactiveoperation of the user in the voice test process based on the machine test is simplified, especially in the test process controlled by the testee, the testee can concentrate on voice expression according to the text corpus, and does not need to distract the energy to carry out various interrupt control or end control in the test process.

The invention provides a thermal power plant electric feed water pump and a start-stop control method thereof. The system comprises an electric pump feed water system and an electric pump lubricating system. The electric pump feed water system comprises a deaerator, an electric pump, an electric pump inlet filter screen, an electric pump inlet electric door, an electric pump outlet check door, an electric pump outlet electric door, an electric pump exhaust electric door, an electric pump recycling regulating valve and an electric pump recycling electric door. The electric pump comprises an electric pump front pump body, an electric pump motor, an electric pump main pump body and a gearbox, wherein the electric pump motor is used for driving the electric pump front pump body and the electric pump main pump body to work. The electric pump inlet filter screen comprises an electric pump front pump inlet filter screen body and an electric pump main pump body inlet filter screen body. The electric pump lubricating system comprises an electric pump lubricating oil tank, a first electric pump lubricating oil pump body, a second electric pump lubricating oil pump body, an electric pump lubricating oil heater, a first smoke exhaust fan, a second smoke exhaust fan, a first electric pump lubricating oil supply filter screen, a second electric pump lubricating oil supply filter screen, a first electric pump lubricating oil cooler and a second electric pump lubricating oil cooler.

The invention provides a gas thermal power plant one-dragging-one set condensate system and a start and stop method thereof. The gas thermal power plant one-dragging-one set condensate system comprises a condensate booster pump recirculating main path, a condensate booster pump recirculating bypass, a first condensate booster pump branch, a second condensate booster pump branch, a first condensate pump branch, a second condensate pump branch, a condensate recirculating main path, a condensate recirculating bypass, a condensate booster pump recirculating pipeline, a condensate recirculating pipeline, a first condensate booster pump, a second condensate booster pump, a first condensate pump, a second condensate pump, a condenser, a sealing heater and a deironing filter. According to the gas thermal power plant two-dragging-one set condensate system, automatic start of the condensate system can be achieved under the full-stop state, automatic stop of the condensate system can be achieved under the running state, automatic start of the condensate system can be achieved under the state of partial start, and the original running state cannot be disturbed.

Provided are a reinforcement cage manufacturing device and method. The reinforcement cage manufacturing device comprises a frame and a power supply motor arranged on the frame. A rotary barrel is arranged on the frame, and a wire feeding mechanism and a movable frame which match the rotary barrel are arranged on the frame. The rotary barrel is rotatably arranged on the movable frame, a sliding groove matching the movable frame is arranged on the frame, and the lower portion of the movable frame is arranged in the sliding groove in a sliding mode. The wire feeding structure comprises two rotary wheels and a straightening wheel, the rotary wheels and the straightening wheel are arranged in a T shape, and the rotary wheels and the straightening wheel are driven by a discharge motor to rotate. When a reinforcement cage is manufactured, reinforcing steel bars and the rotary barrel are fixed, and whether the reinforcing steel bars are straightened through the straightening wheel or not is selected according to the condition of the reinforcing steel bars. Then, a power source is started, and the rotary barrel transversely moves while rotating. The reinforcing steel bars are wound on the rotary barrel, and the reinforcement cage is formed. The device is compact in structure and very convenient to use, and the wound reinforcement cage is good in coaxiality, and meets the processing and manufacturing standard of national construction reinforcing steel bars. By means of the adopted method and parameters in method, the running efficiency of the device can be improved, and electric energy can be saved. Meanwhile, the wound reinforcement cage is compact, and the satisfaction degree of clients is improved.

The invention discloses a walnut crushing device which comprises an assembly box and a conveying box arranged on the left side of the assembly box. An assembly chamber is formed in the assembly box, acrushing box is fixedly arranged on the upper wall of the assembly chamber, a separating box is fixedly arranged on the lower wall of the assembly chamber, a motor is fixedly arranged on the upper right of the assembly chamber, a transmission shaft is in power connection with the left end of the motor, a crushing cavity is formed in the crushing box, a base cavity is formed in the right side of the bottom wall of the crushing cavity in a communicated manner, the left end of the transmission shaft extends into the crushing cavity and is connected with a swing rocker mechanism, the swing rockermechanism comprises a frame fixedly arranged on the bottom wall of the crushing cavity, a driving rocker fixedly connected with the transmission shaft is arranged on the front side of the frame, a first driven rocker is rotatably connected at the other end of the driving rocker, a second driven rocker is rotatably connected at the corner of the first driven rocker, and the other end of the seconddriven rocker is rotatably connected onto the frame.

The invention provides a double-ring sealing oil system and a starting and stopping control method thereof. The system comprises an air side sealing ring, an air side oil storage box, a first air side alternating-current sealing oil pump, a second air side alternating-current sealing oil pump, an air side oil supply mother tube electric door, an air side alternating-current sealing oil pump recycling pressure stabilizing valve, a direct-current sealing oil pump, a main oil hydrogen differential pressure regulating valve, a standby oil hydrogen differential pressure regulating valve, a first smoke exhaust fan, a second smoke exhaust fan, a first air side cooler, a second air side cooler, a first air side oil supply filter screen, a second air side oil supply filter screen, a main oil hydrogen differential pressure regulating valve bypass electric door, an air side direct-current sealing oil pump recycling pressure stabilizing valve, a hydrogen side sealing ring, a hydrogen side oil storage tank, an oil supply regulating valve, an oil drainage regulating valve, a first hydrogen side alternating-current sealing oil pump, a second hydrogen side alternating-current sealing oil pump, a hydrogen side alternating-current sealing oil pump recycling pressure stabilizing valve, a hydrogen side oil supply mother tube electric door, a first hydrogen side cooler, a second hydrogen side cooler, a first hydrogen side oil supply filter screen, a second hydrogen side oil supply filter screen and an air hydrogen side balance valve.

The invention discloses an escalator rider falling recognition system based on computer vision and relates to the technical field of intelligent recognition. The system comprises an escalator area, amonitoring module, an analysis module, a transmission module, an alarm module, a computer terminal module, a manual polling module, an instruction module and a control module, wherein an output end ofthe escalator area and an input end of a network connecting unit are connected electrically; an output end of the monitoring module is electrically connected to an input end of the analysis module; an output end of the analysis module is electrically connected to an input end of the transmission module; and an output end of the transmission module is electrically connected to an input end of thealarm module. When the automatic escalator area is stopped, the computer terminal module can realize signal transmission of the manual polling module, so that rapid dispatching of workers can be realized; an overall rescue speed is increased; and rapid rescue of injured and sick people can be realized.

The invention provides a condenser rubber ball cleaning system for a gas-fired thermal power plant and a start and stop control method of the condenser rubber ball cleaning system. The start and stop control method is applied to the condenser rubber ball cleaning system for the gas-fired thermal power plant. The condenser rubber ball cleaning system for the gas-fired thermal power plant comprises a rubber ball pump, a ball collection room, a ball recovery net, a rubber ball pump inlet valve, a rubber ball pump outlet valve, a condenser, a condenser circulating water inflow electric valve, a condenser circulating water return electric valve, a condenser circulating water return pipeline and a condenser circulating water inflow pipeline. By adoption of the condenser rubber ball cleaning system and the start and stop control method thereof, the condenser rubber ball cleaning system can be automatically started in a full-stop state and can also be automatically stopped in a running state.

A locking device for maintenance of a ship chamber of a ship lift mainly comprises an upper guide frame system, and the upper guide frame system is installed on an upper locking block and makes contact with the side face of a nut column. The upper locking block is assembled on the upper side wall of the rotating center rod and forms a closed oil cavity with the rotating center rod; the lower locking block is assembled on the lower side wall of the rotating center rod and forms a closed oil cavity with the rotating center rod; a transmission shaft is fixed to the lower end of the rotating center rod, and a lower guide frame system is installed on the outer side wall of the transmission shaft, makes contact with the side face of the nut column and is driven by a ship chamber transmission system to rotate. The bottom end of the transmission shaft is rotationally connected with the hinge supporting shaft. The other end of the hinge supporting shaft is connected with a ship chamber structure; the rotary adaptation mechanism is installed at the top end of the rotary center rod and connected with the hydraulic system. The locking device for overhauling the ship chamber of the ship lift and the method of the locking device have the advantages of being good in safety and reliability, exquisite in structure, easy to operate, convenient to install and the like.

The invention provides a generator single-ring sealing oil system for a thermal power plant and an on-off control method of the generator single-ring sealing oil system. The generator single-ring sealing oil system comprises a generator sealing ring, an oil return expansion slot, an intermediate oil tank, an intermediate oil tank level control valve, an air extraction slot, a vacuum oil tank, a sealing oil vacuum pump, a first main sealing oil pump, a second main sealing oil pump, an AC sealing oil pump recycling voltage stabilizing valve, a vacuum oil tank level control valve, a sealing oil recycling pump, a first oil supply filter screen, a second oil supply filter screen, an oil supply adjusting valve, an oil supply adjusting valve bypass electrically-operated gate, a first smoke exhaust fan, a second smoke exhaust fan, a separator, a sealing oil vacuum cooler and a plurality of pipelines. The generator single-ring sealing oil system for the thermal power plant can be automatically started up in the full-stop state and automatically stopped in the running state.

The invention discloses a self-adjusting type steel bar winding device. The device comprises a supporting frame, wherein a mounting plate is fixedly mounted on the top face of the supporting frame, a mounting cylinder is fixedly mounted at one end of the top face of the mounting plate, limiting springs are welded to the two ends of the interior of the mounting cylinder, moving rods are welded to the top ends of the limiting springs, a mounting frame is mounted on the top faces of the moving rods through screws, a moving electric push rod is fixedly mounted at one end of the middle of the mounting frame, a driving motor is fixedly mounted at one end of the moving electric push rod, a rotating shaft is fixedly connected to an output shaft of the driving motor, and a driving cylinder is fixedly connected to the outer side of the middle of the rotating shaft in a sleeving mode. Compared with the prior art, the device has the beneficial effects that a weight during winding can be measured, the purpose of automatic stopping during winding can be achieved, no manual control is needed, then human accidents are reduced, errors between the weights of steel bar coils are reduced, and therefore follow-up workers can conveniently carry the steel bar coils.

The invention discloses a concrete preparation process. The process comprises the following steps of S1, feeding, specifically, respectively pouring different raw materials for preparing concrete into corresponding hoppers; S2, weighing, specifically, enabling the raw materials poured into the different hoppers to be weighed and quantified; S3, feeding, specifically, pouring the raw materials weighed in the step S2 into a stirring bin through the hoppers; and S4, stirring the raw materials in the stirring bin to prepare the concrete. A concrete preparation device comprises the hoppers, bases, weighing elastic pieces and the stirring bin. The hoppers are correspondingly located above the bases, the hoppers are in sliding connection with the bases in the vertical direction, and the weighing elastic pieces are located between the hoppers and the bases so as to drive the hoppers to move in the direction away from the bases; and the stirring bin is located below the bases, and the bases can drive the hoppers to turn over in a reciprocating manner in the vertical plane. By adopting the concrete preparation process disclosed by the invention, the preparation quality of the concrete can be improved.

The invention provides a heat-engine plant boiler start steam water system and a start-stop control method thereof. The system comprises a water feeding adjustment valve, a coal economizer, a water-cooling wall, a mixed collection box, a steam water separator, an overheater, a water storage tank, a boiler water circulating pump, a boiler water circulating pump outlet adjustment valve, a drainage collection box, two drainage pumps and a plurality of pipes. The coal economizer is connected with the water-cooling wall, and the water-cooling wall penetrates through the mixed collection box to be connected with the steam water separator; and the water feeding adjustment valve is arranged between a boiler water feeding pump and the coal economizer. The overheater is connected with a steam outlet in the upper portion of the separator; and the water storage tank is connected with a water outlet in the lower portion of the separator. The two ends of the boiler water circulating pump are provided with an inlet electric door and an outlet electric door correspondingly, and a recycling electric door is arranged between a water outlet of the boiler water circulating pump and the water storage tank. The boiler water circulating pump outlet adjustment valve is arranged between the outlet electric door and the coal economizer. A water discharging electric door and a water discharging adjustment valve are arranged between the water storage tank and the drainage collection box. The two drainage pumps are connected in parallel and are arranged at a drainage opening of the drainage collection box, inlets are all provided with filter screens, and outlets are provided with the outlet adjustment valve.