39results about How to "Avoid compromising safety" patented technology

The invention relates to a shield construction method for a shallow buried section under a lake, and belongs to the field of shield tunnel construction, the method comprises the following steps of: after determining the position of a cofferdam to be constructed above the shallow buried section under the lake, putting a sand bag into the lake in a mode of sliding along a slope from the shore to theinside of the lake, and folding to form the cofferdam; draining the lake water in the folded cofferdam and laying a sand bag cushion layer on the bottom of the lake water; then carrying out stirringpile reinforcement on the soft stratum below the sand bag cushion layer; removing the sand bag cushion layer and digging out the surface soil layer above the soft stratum after the implementation of the stirring pile reinforcement; then throwing thick stones or block stones into the cofferdam and vibrating and pressing while the stones are filled, and using the cofferdam as a grouting platform; and then grouting and reinforcing the soft stratum, wherein, after the grouting and reinforcing strength reaches the requirement, the shield passes through the shallow buried section at the bottom of the lake, and after the shield passes through the lake, the sand bag cofferdam is removed, and the remains in the lake are removed. According to the invention, the soft stratum of the shallow buried section under the lake is reinforced and filled in time, so that excessive lake bottom settlement is avoided, and accidents such as burst or large-area collapse and the like are prevented from affectingengineering safety and environmental safety.

The invention discloses a movable rollover-type mixer truck, and belongs to the field of building devices. The movable rollover-type mixer truck comprises a chassis, and a stirring cylinder, a stirring cylinder driving mechanism, a driving control unit, a hydraulic unit and a power device which are arranged on the chassis. The stirring cylinder is located at the front portion of the chassis. The driving control unit is located behind the stirring cylinder. A material shovel capable of rising, falling and rolling over is hinged to the front end of the chassis. A rotating mechanism is arranged on the chassis. A support with the front side high and the rear side low is connected to the upper portion of the rotating mechanism. The stirring cylinder and the stirring cylinder driving mechanism are both arranged on the support. The stirring cylinder driving mechanism drives the stirring cylinder to rotate. The front portion of the machine frame is hinged to the rotating mechanism. The rear portion of the machine frame is connected with the rotating mechanism through a first hydraulic jack. While ensuring the normal rotation of the stirring cylinder, the first hydraulic jack jacks up the rear end of the stirring cylinder for rapid discharge, the rotating mechanism adjusts the discharge position of the stirring cylinder at all angles, and the material shovel can convey various types of materials into the stirring cylinder to be mixed with concrete on site.

The invention discloses a high-efficient energy-saving gas-liquid separator, which comprises a gas-liquid separation tank, a gas-liquid separator body is arranged in the gas-liquid separation tank, the gas-liquid separator body divides an internal space of the gas-liquid separation tank into a gas collection chamber and a liquid collection chamber, a liquid inlet pipe is arranged on the gas-liquidseparation tank, an exhaust pipe is arranged on the top of the gas-liquid separation tank, a drain pipe is arranged on the bottom of the gas-liquid separation tank , a projecting metal strip is mounted on the internal wall of the gas-liquid separator body, a horizontally arranged agitating rod is arranged in the gas-liquid separator body, clamping plates are welded on the agitating rod, moreover,agitating blades are connected to the clamping plates through bolts, a liquid collection plate is arranged in the liquid collection chamber, the liquid collection plate divides the liquid collectionchamber into an upper liquid collection chamber and a lower liquid discharge chamber, an inverted U-shaped pipe is arranged in the liquid collection chamber, one end of the inverted U-shaped pipe is arranged over the liquid collection plate, and the other end runs through the liquid collection plate and extends into the liquid discharge chamber. According to the high-efficient energy-saving gas-liquid separator provided by the invention, as gas-liquid separation is carried out, the whole high-efficient energy-saving gas-liquid separator can quickly separate gas and liquid, and has the advantages of good separation effect and resource saving.

The invention discloses a high-power steering engine fixing frame. The high-power steering engine fixing frame comprises a bearing frame and a clamp unit, wherein the bearing frame comprises a bearing plate and a plurality of supports which are arranged at intervals; the bearing plate is connected the upper ends of the plurality of supports; the clamp unit is mounted on the bearing frame; the clamp unit comprises a fixing seat, a first clamping block, a second clamping block and a third clamping block; the first clamping block and the second clamping block are mounted on two sides of the fixing seat respectively; the third clamping block is mounted above the first clamping block and the second clamping block; and the first clamping block, the second clamping block and the third clamping block are matched with one another to form a containing cavity for containing a steering engine. By adopting the high-power steering engine fixing frame, the technical problems that the safety of debugging personnel is possibly endangered or a common fixing frame is possibly damaged when people debug the large-size steering engine under a load condition, and great potential safety hazards exist are solved.

A bearing capacity analysis method for a pre-drilled pile sinking foundation in a dam area comprises the following steps: (1) layering a site stratum according to stratum formation causes, times, lithology and engineering characteristics of a construction site; (2) determining precast pile parameter values of different stratums; 3) setting a test pile area A and a test pile area B, arranging a plurality of test piles and anchor piles in the test pile areas, and estimating the compressive ultimate bearing capacity of all single piles to obtain an estimated value; 4) performing construction andstatic load test analysis to obtain a bearing capacity measured value of each single pile; 5) comparing the estimated value of each single pile with the measured value, and carrying out bearing capacity abnormity reason analysis on the single pile with large deviation between the measured value of the bearing capacity and the estimated value; (6) providing a calculation method which can consider the influence of the hole diameter and the hole depth of the pre-drilled hole and accurately estimate the single-pile bearing capacity; (7) providing a pile foundation bearing capacity model considering the stress diffusion theory to calculate a short pile estimated value, and (8) evaluating the pile foundation bearing capacity by adjusting the hole depth and the hole diameter of the pre-drilled hole.

The invention relates to a sealed type sampling device which belongs to the technical field of medium sampling facilities. The sealed type sampling device comprises a sampling bottle, wherein one end of the sampling bottle is provided with a first pipeline adapter in a matching way, the other end of the sampling bottle is provided with a second pipeline adapter in a matching way, and the first pipeline adapter and the second pipeline adapter are both communicated with a bottle cavity of the sampling bottle. The sealed type sampling device is characterized in that the side part of the height direction of the sampling bottle is provided with a burst prevention joint in an extension way, the burst prevention joint is communicated with the bottle cavity, and a burst prevention mechanism is connected on the burst prevention joint. According to the technical scheme, the sampling bottle is connected to a pipeline by a first pipeline connection port and a second pipeline connection port quickly for carrying out sampling; after the sampling, when the pressure in the sampling bottle is increased, due to the protection of the burst prevention mechanism arranged on the burst prevention joint and the pressure relief of the burst prevention mechanism, the burst of the sampling bottle can be avoided and the safety influence caused by the diffusion of harmful gas can be eradicated.

The invention relates to a high-voltage cable porcelain bushing terminal explosion protection device externally sleeving a porcelain bushing terminal. The high-voltage cable porcelain bushing terminal explosion protection device is characterized in that the protection device is of a cage structure and comprises an upper flange, a lower flange, a plurality of protection components and a middle supporting plate, the upper flange and the lower flange are connected with two ends of the porcelain bushing terminal respectively, the protection components are arranged between the upper flange and the lower flange in an evenly spaced manner and surround the porcelain bushing terminal, and the middle supporting plate is fixed onto the protection components. Compared with the prior art, the protection device has fine impact resistance and is convenient to disassemble and assemble, and splashing ceramic fragments generated after explosion of the porcelain bushing terminal cannot affect safety of surrounding people and near high-voltage equipment.

The invention discloses an intelligent solid hazardous waste feeding system. The intelligent solid hazardous waste feeding system comprises an incinerator body; the upper end of the interior of the incinerator body is fixedly connected with a partition plate; a connection hole is formed in the inner surface of the partition plate; a mounting sliding chute is formed in the upper surface of the partition plate; a circular weighing instrument is fixedly installed on the inner bottom face of the mounting sliding chute; a feeding base is slidably connected to the inner surface of the mounting sliding chute; a taper-shaped charge bin is arranged at the upper end of the interior of the feeding base; a sealed feed hole is formed in the inner bottom face of the taper-shaped charge bin; the lower surface of the sealed feed hole is fixedly connected with a feed pipe; the outer surface of the feed pipe is slidably connected to the lower end of the interior of the incinerator body through the connection hole; and the lower surface of the feeding base is fixedly installed on the two sides of the upper surface of the circular weighing instrument through supporting blocks. By means of the intelligent solid hazardous waste feeding system, using convenience and stability can be greatly improved, and efficient and safe incineration is ensured.

The invention provides a catalytic oil-free gas supply device and a catalytic oil-free compression system.The catalytic oil-free gas supply device comprises a catalytic purifier, a catalytic gas inlet pipe and a catalytic exhaust pipe are arranged on the catalytic purifier, and an oil content detection device and a buffer device are arranged on the catalytic exhaust pipe; the catalytic gas inlet pipe is used for guiding compressed gas into the catalytic purifier, the catalytic purifier is used for catalytically decomposing oil impurities in the compressed gas, and the catalytic gas exhaust pipe is used for guiding the compressed gas in the catalytic purifier into the buffer equipment; the oil content detection equipment is used for detecting the oil content of the compressed gas before the compressed gas enters the buffer equipment, the buffer equipment is used for buffering the compressed gas and discharging the compressed gas, and the detection rate of the oil content detection equipment is not greater than the rate of the compressed gas passing through the buffer equipment. When the catalytic oil-free gas supply device is used for supplying gas, the oil content of the compressed gas to be input into the gas consumption equipment of a user can be detected in real time or in advance, and the gas consumption quality of the user is guaranteed.

The invention discloses automatic filling equipment for sun screen. The automatic filling equipment comprises a rack. A machine body is arranged on the inner side of the rack, filling heads are arranged at the lower end of the inner side of the machine body, a conveying belt is arranged at the lower end of the inner side of the rack, sliding grooves are formed in the front face of the machine body, springs are fixed to one ends of the inner sides of the sliding grooves, sliding blocks are fixed to the other ends of the springs, and connecting rods are rotationally mounted on the inner sides ofthe sliding blocks. Through the arrangement of the sliding grooves, the connecting rods, cleaning grooves, the springs, the sliding blocks, sponge bodies and rotary barrels, the situation that the cleaning effect of the inner sides of the lower ends and the outer surfaces of the filling heads is not good, bacterium breeding is easily caused, and the safety of the product is affected is conveniently avoided, and through the arrangement of limiting plates, mounting blocks, adjusting screws and sliding plates, the situation that when the width of a to-be-filled shell body is small, the to-be-filled shell body easily topples over towards the two sides of the conveying belt, and therefore the conveying effect is poor is conveniently avoided.

The invention relates to an anti-theft window with clothes drying and escape functions. The anti-theft window comprises hanging brackets, winding devices, a clothes hanger part, connecting ropes, slowdescending devices, lifting ropes, a window body, a wall outer vertical face and an anti-theft window body. The anti-theft effect is achieved, the escape function is further achieved, and when fire accidents occur, the guarantee is provided for the life safety of indoor personnel.

The invention relates to medical nursing equipment, in particular to a multifunctional infusion support. The multifunctional infusion support comprises a base, universal wheels are arranged on the bottom face of the base, a nut is arranged on the side wall of the base, and a telescopic landing leg is arranged inside the nut. The telescopic landing leg is a screw telescopic landing leg, a level isarranged on the upper top face of the base, a storage battery and a controller are mounted in the base, a communication module is arranged on the base, a strut is arranged in the center of the upper surface of the base, a small fan and an electric heating handbag are arranged on the side wall of the strut, a mirror is arranged on the side wall of the strut, a first-aid button is mounted on the side wall of the strut, a cross rod is arranged at the top end of the strut, an LED lamp is arranged below the cross rod, a recording plate and a fixing clamp are arranged on the side wall of the strut,a net bag is arranged at the bottom end of the cross rod, a weighing sensor is arranged at the bottom of the net bag, and a camera is arranged on the side wall of the top end of the strut. Nurses canconveniently come around to replace liquid medicine and check the situation, and the multifunctional infusion support is simple in structure, convenient to use and beneficial to popularization.

The invention discloses a rail transit construction period safety risk management and control device which comprises a foundation pit and a subway pipeline embedded in the foundation pit; a base is embedded in the bottom of the subway pipeline; a protection cavity is formed in the inner wall of the subway pipeline; a first annular plate and a second annular plate are arranged in the protection cavity; mounting cavities are formed in the left side and the right side of the base; a same flow guide assembly is arranged in the first annular plate and the two mounting cavities; and a same drying assembly is arranged in the second annular plate and the two mounting cavities. According to the rail transit construction period safety risk management and control device, through mutual cooperation of a management and control mechanism, the flow guide assembly and the drying assembly, permeated water can be subjected to recycling treatment and double drying treatment, so that water is prevented from permeating into the subway pipeline, double early warning reminding can be carried out, constructors in the pipeline can carry out prevention and emergency treatment in time, and therefore, risk management and control in a track construction process are completed.

The invention relates to a clothes hanger with an escaping function. The clothes hanger comprises a hanging frame, a wire take-up device, a clothes hanger component, a connecting rope, a slow descending device, a lifting rope, a window, a wall body outer vertical surface. The clothes hanger can be used for airing clothes and has the escaping function.

The invention relates to the technical field of water conservancy projects, and discloses a water conservancy project desilting device safe to use. The water conservancy project desilting device safeto use comprises a floating plate, wherein the floating plate is of a rectangular structure, a top groove is formed in the top surface of the floating plate and is a rectangular groove, a silt storagebasket is movably clamped in the top groove and is of a rectangular hollow structure, the top surface of the silt storage basket is open, and the silt storage basket is used for storing silt sucked out of a water channel. According to the water conservancy project desilting device safe to use, when the silt storage basket needs to be replaced, pull plates are pulled, the pull plates drive clamping columns connected to the pull plates to move towards the exterior of the floating plate, the pull plates are in linkage with fixing inner columns connected to the pull plates to move towards the exterior of the floating plate, limiting plates limit the moving position of the fixing inner columns, at the moment, tension springs are in a stretched state, and after the clamping columns leave the interiors of clamping grooves, a worker can take out the silt storage basket from the interior of the top groove, so that the effect of independently taking out and replacing the silt storage basket isachieved, and the working efficiency is improved.

The invention relates to the technical field of airborne evaporation cycle refrigeration, in particular to an automatic condensate water discharging device of an onboard evaporator. The device comprises an evaporator shell, an evaporation draught fan, a ventilation pipe, a water drainage pipe and a valve body; a three-way structure is formed in an inner cavity of the valve body; and a valve plateis rotatably arranged in the inner cavity of the valve body. When the evaporation draught fan forms air exhaust negative pressure, the valve plate seals the lower end of the ventilation pipe and the lower end of the water drainage pipe; and when the evaporation draught fan does not work, the valve plate is in a free rotating state. By the adoption of the automatic condensate water discharging device of the onboard evaporator, electric energy is not consumed, the installation space on a machine is not increased, condensed water of the machine-mounted evaporator can be automatically discharged,the situation that condensed water is smoothly discharged out of the evaporator in a negative pressure environment is guaranteed, the influence of the negative pressure in the evaporator on condensedwater discharging is reduced, and the functional performance of the evaporator is improved; and meanwhile, the condensate water is prevented from entering a cabin due to unsmooth discharge to influence the safety of other equipment on an aircraft, and the comfort of passengers in the cabin is improved.

The invention discloses a wind-driven bird repelling device, and relates to the technical field of wind power driving. The wind-driven bird repelling device comprises a hexagonal base, wherein a positioning column is movably connected to the middle position of the top of the hexagonal base, a reinforcing seat plate is fixedly connected to the position, corresponding to the hexagonal base, of the outer surface of the positioning column, and a sound wave mechanism is fixedly connected to the end, away from the hexagonal base, of the positioning column; the outer surface of the end, away from the positioning column, of the sound wave mechanism is movably connected with a rotating ring, the outer surface of the rotating ring is movably connected with a wind-driven spherical cover, the bottom of the rotating ring is movably connected with the sound wave mechanism, the bottom of the outer surface of the wind-driven spherical cover is movably connected with the sound wave mechanism, and the bottom of the sound wave mechanism is movably connected with the reinforcing seat plate. The wind-driven bird repelling device is triggered through magnetic force, intermittent self-control is facilitated, adaptability of birds to sound waves is reduced, the dispersing effect of the birds is improved, meanwhile, the surface of the device is smooth, point effect cannot be generated, and self-protection capacity is enhanced.

The invention discloses a fault detection method and system for a complex process considering a dynamic relationship in advance. The method comprises the steps of obtaining and preprocessing normal measurement data and normal quality data in the complex industrial process during normal operation; establishing a dynamic orthogonal signal correction model according to the preprocessed normal measurement data and normal quality data; establishing an improved partial least square model according to the dynamic orthogonal signal correction model and the preprocessed normal measurement data and normal quality data; acquiring and preprocessing real-time measurement data and real-time quality data in the complex industrial process in operation; obtaining expected real-time measurement data according to the dynamic orthogonal signal correction model and the preprocessed real-time measurement data; based on an improved partial least squares model, expected real-time measurement data and preprocessed real-time quality data, detecting quality-related faults in the running complex industrial process. The reliability and safety of a complex system are improved, and major accidents are reduced.

The invention relates to an excitation loss protection admittance characteristic setting method for a nuclear power plant generator. The method is characterized in that admittance characteristic and low voltage of static stability limit are solved by using a power equation set of a turbine generator, and then the constant value of excitation loss protection of the turbine generator is solved; the method specifically comprises the following steps: 1) solving the terminal measuring admittance YG of the turbine generator; 2) setting terminal low voltage latching excitation loss protection on the turbine generator, and solving the terminal low voltage of the turbine generator; and 3) determining the constant value of excitation loss protection of the turbine generator, wherein when the turbine generator has an excitation loss fault, the terminal low voltage latching excitation loss protection is set for selective protection, namely the low voltage latching value of excitation loss protection is set to be U(los, m), the excitation loss protection is latched when the terminal inter-phase voltage is lower than U(los, m), and the excitation loss protection is opened when the terminal inter-phase voltage is greater than or equal to U(los, m). The method has the characteristic of high calculation precision and good social benefits.

The invention relates to the technical field of mechanical automation, and discloses a high-lock bolt screwing actuator and an assembly robot. The high-locking bolt screwing actuator comprises an actuator body, a nut tightening mechanism and an automatic feeding assembly. The nut tightening mechanism is arranged on the actuator body in a penetrating mode, the nut tightening mechanism can contain a nut and can drive the nut to rotate, the nut is connected to a bolt in a threaded mode, a lantern ring on the nut is twisted off, the automatic feeding assembly can convey the nut into the nut tightening mechanism, and the twisted-off lantern ring can be recycled. According to the high-lock bolt screwing actuator, when a high-locking bolt is screwed, automatic nut feeding and lantern ring recycling can be achieved. The assembly robot comprises the high-lock bolt screwing actuator, a robot body, a force sensing assembly and a visual assembly, and the assembly robot can be used for precisely screwing the high-lock bolt, automatically feeding and recycling the broken lantern ring.

Disclosed is an elevator landing sill. The elevator landing sill is mainly characterized by comprising a base plate, a right dragging block, reinforcing ribs, clamping hooks, an ash leaking groove, a cylindrical hole, a left lower dragging block, an antiskid groove and kidney-shaped holes. The base plate is of a U-shaped structural style. The right dragging block is perpendicularly connected with the upper end of the right side wall of the base plate, and is of an L-shaped structural style. The left lower dragging block is perpendicularly connected with the upper end of the left side wall of the base plate. The antiskid groove is formed in the top surface of the left lower dragging block. The ash leaking groove is formed between the base plate and the left lower dragging block. The clamping hooks are arranged at the bottom of the ash leaking groove. The reinforcing ribs are arranged on the portion, close to the middle, of the outer wall on the left side of the base plate. The kidney-shaped holes are formed in the bottom surface of the base plate. The cylindrical hole is formed in the left lower dragging block.

The invention provides an overpressure preventing device for a pump box of an air separation plant. The overpressure preventing device for the pump box of the air separation plant mainly comprises a cylinder, a flange, a blank flange, a seal ring, bolts, a connection piece, a waterproof cylinder and a waterproof cover plate. One end of the cylinder is connected with the flange in a welded manner.The flange is connected with the blank flange through the bolts. The large end of the bolt is in spot welding with the flange. The blank flange can move in the vertical direction along the bolt. The nitrile butadiene rubber seal ring is arranged between the flange and the blank flange in a padding manner and guarantees that the pump box is sealed in the normal state. The waterproof cover plate isadditionally arranged outside the blank flange. The waterproof cover plate is welded to the waterproof cylinder. The waterproof cover plate, the waterproof cylinder and the connection piece constitutea waterproof assembly. The waterproof assembly is connected with the flange in a welded manner through the connection piece, and therefore it can be guaranteed that rainwater cannot enter the pump box. The overpressure preventing device for the pump box of the air separation plant has the advantages of being simple in structure, safe, reliable, reasonable, efficient, high in practicability and the like, the overpressure preventing device is suitable for small-sized isolating boxes achieving heat preservation with pearlite, such as the pump box, a valve box and a collection box, and the situation that seal gas in the isolating boxes is at overpressure, so that safety accidents are caused can be effectively prevented.

The invention discloses a motorcycle lamp with brightness adjustment control and a control system, which are used for solving the problems that the existing motorcycle lamp control system cannot judge and analyze the brightness of the motorcycle lamp according to a driving route and cannot reasonably adjust the brightness, so that the motorcycle lamp is easy to be too bright, and the driving safety of an opposite driving vehicle is influenced. Comprising a motorcycle lamp body and a control end installed on the motorcycle lamp body. The control end is used for controlling the brightness of a motorcycle lamp in the motorcycle lamp body; the control end comprises a route unit, an acquisition unit, a processor, a communication unit and a brightness adjusting unit; the route unit is used for inputting a driving route and sending the driving route to the processor; the brightness of the motorcycle lamp is adjusted according to the illumination intensity of the position where the motorcycle lamp is located and whether there is a vehicle on the running route, so that the motorcycle lamp is reasonably controlled to illuminate, and meanwhile, the situation that the safety of the opposite running vehicle is affected by too high brightness is avoided.

The invention discloses an intelligent fitness and monitoring device which comprises a main body, a bottom plate, a fresh air system, an air detection system, a cleaning system, health protection devices and a controller, wherein the main body is partitioned into multiple compartments; vertically arranged ventilating pipelines are respectively arranged at four corners of the compartments; the fresh air system comprises multiple independently operating extension sets; the cleaning system is provided with atomization and spraying devices and ultraviolet lamps; the health protection devices are arranged in the ventilating pipelines; traditional Chinese medicine compositions are arranged in the health protection devices; and the controller is wirelessly connected to the fresh air system, the air detection system and the cleaning system. The intelligent fitness and monitoring device can respectively manage all the compartments, so as to guarantee the air quality in each compartment and ensure that an exerciser can get an effective workout in a healthy environment; and meanwhile, by the arrangement of the special health protection devices, a physical therapy effect can be achieved via smell emitted by the traditional Chinese medicine compositions when the exerciser does exercises, thus refreshing the brain, relieving the fatigue and enhancing the immunity of a human body.

The invention relates to the technical field of onboard evaporative cycle refrigeration, in particular to an automatic discharge device for condensed water of an onboard evaporator. Including evaporator shell, evaporating fan, ventilation pipe, drain pipe and valve body; the inner cavity of the valve forms a three-way structure, and a valve plate is rotatably installed in the inner cavity of the valve; when the evaporating fan forms a suction negative pressure, the The valve plate closes the lower end of the ventilation pipe and the lower end of the drain pipe; when the evaporation fan is not working, the valve plate is in a state of free rotation. The device of the present invention does not consume electric energy, does not increase the installation space on the machine, and can realize the automatic discharge of condensed water from the on-board evaporator, ensuring that the condensed water can be discharged smoothly from the evaporator in a negative pressure environment, and reducing the impact of negative pressure in the evaporator on condensation. The impact caused by water discharge can improve the functional performance of the evaporator, and at the same time prevent the condensed water from entering the cabin due to poor drainage and affect the safety of other equipment on board, and increase the comfort of the cabin crew.

The invention relates to an excitation loss protection admittance characteristic setting method for a nuclear power plant generator. The method is characterized in that admittance characteristic and low voltage of static stability limit are solved by using a power equation set of a turbine generator, and then the constant value of excitation loss protection of the turbine generator is solved; the method specifically comprises the following steps: 1) solving the terminal measuring admittance YG of the turbine generator; 2) setting terminal low voltage latching excitation loss protection on the turbine generator, and solving the terminal low voltage of the turbine generator; and 3) determining the constant value of excitation loss protection of the turbine generator, wherein when the turbine generator has an excitation loss fault, the terminal low voltage latching excitation loss protection is set for selective protection, namely the low voltage latching value of excitation loss protection is set to be U(los, m), the excitation loss protection is latched when the terminal inter-phase voltage is lower than U(los, m), and the excitation loss protection is opened when the terminal inter-phase voltage is greater than or equal to U(los, m). The method has the characteristic of high calculation precision and good social benefits.

The invention provides a method for monitoring safe operation of a catalytic oil-free compression system, which comprises the following steps of: catalytically decomposing oil impurities in compressed gas by using a catalytic purifier, and respectively arranging first oil content detection equipment and second oil content detection equipment at the gas inlet end and the gas outlet end of the catalytic purifier to detect the oil content of the compressed gas, the oil content of the compressed gas purified by the catalytic purifier is firstly detected by the second oil content detection equipment, then the compressed gas is buffered and decelerated by the buffer equipment, and the buffer time of the compressed gas in the buffer equipment is longer than the detection time of the second oil content detection equipment; detection results of the first oil content detection equipment and the second oil content detection equipment and a difference value between the detection results are displayed on the display screen. According to the method, a user can master the working states of the compressor and the catalytic purifier in real time, whether the compressor leaks oil or not and whether a catalyst in the catalytic purifier faces the overload risk or not are judged, the gas quality of the user is guaranteed, and the safety of the whole machine is protected.

The invention discloses an automatic fuel gas flow control system for a wire-drawing and filling-sealing machine. The automatic fuel gas flow control system comprises a control component and a flow proportional control valve component, wherein an input end of the flow proportional control valve component is communicated with a combustion-supporting gas source and a fuel gas source respectively; an output end of the flow proportional control valve component is connected with a combustion nozzle component; a control end of the flow proportional control valve component is connected with the control component and used for receiving a control signal of the control component to regulate a mixing proportion and / or the flow of the fuel gas. The automatic fuel gas flow control system has the advantages of being capable of increasing the automatic level, improving a control effect and the like.

The invention provides a method for monitoring safe operation of a catalytic oil-free compression system, which comprises the following steps of: catalytically decomposing oil impurities in compressed gas by using a catalytic purifier, detecting the oil content of the compressed gas by using first oil content detection equipment before the compressed gas enters the catalytic purifier, buffering and decelerating the compressed gas by using buffering equipment, and displaying a detection result on a display screen; when the oil content of the compressed gas does not exceed the standard, the compressed gas flows into the catalytic purifier; when it is displayed that the oil content of the compressed gas exceeds the standard, gas supply to the catalytic purifier is cut off; the structure of the buffer equipment is determined according to the detection time of the first oil content detection equipment, and it is ensured that the buffer time of the compressed gas in the buffer equipment is longer than the detection time of the first oil content detection equipment. According to the method for monitoring the safe operation of the catalytic oil-free compression system, the compressed gas with the oil content exceeding the standard can be prevented from entering the catalytic purifier, the catalytic purification equipment is protected, and the safe operation of the whole machine is guaranteed.