104results about How to "Avoid overload damage" patented technology

The invention discloses a full-trailer braking system and a braking method thereof. The full-trailer braking system comprises a braking air supply pipeline, a traveling braking control pipeline, a parking braking control pipeline, an ABS system and a pipeline connecting all parts. The braking air supply pipeline is connected with a braking air supply pipeline of a tractor to provide pressure air for the full-trailer braking system. The traveling braking control pipeline is connected with a traveling braking control pipeline of the tractor to provide control pressure for traveling braking of a full-trailer. The parking braking control pipeline is connected with a parking braking control pipeline of the tractor to provide the control pressure for parking braking of the full-trailer. The full-trailer braking system can be directly operated by a driver in a cab; meanwhile, the full-trailer braking system has the ABS anti-lock function and has a self-adaptive ability to different suspension loads and braking force.

The invention discloses a wheel type conveying line which comprises a rack. Multiple rows of eccentric rotating wheels are arranged on the rack in an equal height manner. The axes of all the eccentricrotating wheels are parallel to one another and are parallel to the horizontal plane. Each eccentric rotating wheel is arranged on an installing frame located on the rack in the manner of rotating around the axis of the eccentric rotating wheel. The eccentric rotating wheels on each row are attached to a driving roller, the driving roller makes contact with the lower semicircle of each eccentricrotating wheel, the driving roller is affected by upward elastic force, and thus the eccentric rotating wheels are attached to the driving roller in a self-adapting manner, or the driving roller makescontact with the upper semicircle of each eccentric rotating wheel, the eccentric rotating wheels are affected by the upward elastic force, and the eccentric rotating wheels are attached to the driving roller in a self-adapting manner. The driving roller rotates under the driving of a first power source, and the eccentric rotating wheels are driven to rotate through friction force. According to the wheel type conveying line, the design of the scheme is elaborate, the eccentric rotating wheels or the driving roller are affected by the upward elastic force, thus the eccentric rotating wheels always keep being attached to the driving roller, after abrasion is caused or when the installing position precision is poor, self-adaptive adjusting is achieved, rotating between the eccentric rotatingwheels and the driving roller is effectively ensured, and the conveying stability is improved.

The invention discloses an overlapping quantity pneumatic measuring device and method of a large-flow electro-hydraulic servo valve. The overlapping quantity pneumatic measuring device is mainly composed of a valve seat pressing air cylinder, a differential pressure type flow meter, a tension pressure sensor, an electric translation table, a valve sleeve push-out air cylinder, a valve sleeve ejector rod, an air distribution seat, an auxiliary ejector rod, a sliding valve assembly, a guide seat, a valve seat pressing rotating air cylinder, a displacement sensor, a displacement sensor horizontalmoving air cylinder, a sliding block guide rail, a valve element clamping air cylinder and the like; According to the method, an overlapping quantity pneumatic comprehensive measuring method of a pressure type measuring gas path and a flow type measuring gas path is mainly adopted. The overlapping quantity pneumatic measuring device has the advantages that under the premise that the overlapping quantity measuring precision and repeated precision requirements of the large-flow electro-hydraulic servo valve are met, the overlapping quantity measurement of large-flow sliding valve pairs with various size specifications can be achieved, the measuring automation degree and the testing efficiency are greatly improved, and the skill requirements of operating workers are reduced.

The invention discloses a material rubbing and squeezing smashing mechanical device which comprises an upper device shell, a middle device shell and a lower device shell. A smashing motor is arranged on the upper portion of the upper device shell and matched with a rotating shaft. An ash damper is arranged in the upper device shell. The rotating shaft is matched with a connector through a telescopic rod which is sleeved with a spring. The end of the connector is connected with a rotating pulverizing disc. One side of the middle device shell is connected with a controller through a connecting frame, and the other side of the middle device shell is connected with a feeding pipeline. A feeding device is arranged at the end of the feeding pipeline and communicates with a feeding hopper. One side of the lower device shell is provided with a material clearing motor and a discharge port, and the material clearing motor is matched with a material clearing shovel through a transmission device. When the material rubbing and squeezing smashing mechanical device is used, materials can be smashed under the combined action of downward pressure and rubbing force, the smashing intensity is high, and the smashing effect is good; and in addition, the material clearing device is arranged, so that material clearing is convenient and rapid, and working efficiency is high.

The invention provides a multimeter capable of preventing wrong gear selection. The multimeter comprises probes (10), a measurement module (11), a dial (12), a multi-gear button (13), a gear determination module (14), a voice module (15), a loud speaker (16), a master control one-chip microcomputer (17), a controlled switch (18) and a confirmation button (19). The gear determination module (14) that is connected with the multi-gear button (13) is used to determine a gear that is selected by the multi-gear button (13). The voice module (15) generates a voice signal that is used for prompting the selected gear according to a determination result of the gear determination module (14); and the voice signal is played by the loud speaker (16). After confirmation, the master control one-chip microcomputer (17) controls opening and closing of the controlled switch (18), so that the probes (10) and the measurement module (11) are connected to realize parameter measurement. According to the invention, beneficial effects are as follows: prompting and user confirmation processes are provided and thus it can be avoided that a user selects a wrong gear, so that overload damage caused by wrong gear selection by the multimeter can be effectively prevented.

The invention relates to an adjustable wind power generation device, namely a vertical axis wind wheel connecting rod combination variable pitch wind power generation device. The vertical axis wind wheel connecting rod combination variable pitch wind power generation device includes a lower support plate, an upper support plate which are sleeved on the central shaft of the wind wheel, and a wind wheel blade plate which arranged between the upper support plate and the lower support plate. A power generation rotor is fixedly connected with the lower supporting plate, and the stator is fixed on the central shaft of the wind wheel. A blade plate support shaft is arranged between the upper support plate and the lower support plate, and the wind wheel blade plate is arranged on the blade plate support shaft and rotates around the blade plate support shaft. A variable pitch system capable of adjusting the working position of the wind wheel blade plate is arranged on the central shaft of the wind wheel. The vertical axis wind wheel connecting rod combination variable pitch wind power generation device can effectively lower the rotating speed of the wind wheel, reduced the wind energy conversion rate of the vertical axis wind wheel, and achieves the overload protection for a permanent magnet generator.

The invention discloses a low-temperature idle running heating control system and a method of a wind generating set. The system comprises a control system, an electric pump and a heating system. When the oil temperature of a gear box is below a certain value, a gear box lubricating system enters a low-temperature starting state, then the control system controls a propeller to change the pitch to a certain angle, gear box idle rotation is maintained so as to mix lubricating oil, the oil temperature of the gear box rises uniformly, and the control system does not start the heating system until the rotating speed of a high speed shaft is maintained at a set value. After the oil temperature of the gear box reaches the minimum machine starting oil temperature, the control system pre-starts the electric pump to a low-speed state, and monitors a load current of the electric pump; when the load current of the electric pump can not meet the starting condition of the gear box lubricating system, the wind generating set carries out idle rotation continuously and the gear box is kept heated. According to the system and the method, safe operation of the low-temperature starting process of the wind generating set can be guaranteed, the starting process on the low-temperature condition is accelerated, the labor intensity of workers is lowered, and the generated energy of the wind generating set is increased.

The invention discloses a system and a method for controlling a climb form platform. The climb form platform control system comprises a central processing machine, an intelligent sub control machine and sensors. The sensor is installed on each elevator site of the climb form platform and is connected with the intelligent sub control machine of the elevator site; the intelligent sub control machine is connected separately with the elevator device on the corresponding elevator site and the central processing machine. The inventive control method comprises performing promotion of the climb form platform and operation intelligent control via the climb form platform control system, preventing the damage of elevator overload on the elevator site and improving the safety and mechanism automatic level of promoting the climb form platform.

The invention discloses a fork lowering device and a fork descent method of electric forklift. Real-time height of fork in the process of descending can be checked by using a height measurement module. Height value of a fork can be read by using a digital CPU. The digital CPU can also work out speed and accelerate speed of the fork, when the fork is moving. A servo motor and a stepper motor can be driven to move by a pulsing signal which is sent after being processed by the digital CPU. The digital CPU can further control opening size of an oil return port which is on a controlling valve. The digital CPU can make opening size of an oil return port which is on a valve of a hoist cylinder be changed in correspondence with falling head of the fork, and make descent speed of the fork be changed from fast to slow, which belongs to infinite speed mode. The digital CPU can ensure that the speed of the fork can be as fast as possible when the fork is needed to move fast and vice versa. The digital CPU can ensure that fast speed, stability and safety can all be achieved in the process of descending and that impact on a portal frame and overload damage of internal module in a door frame descending device, which are caused by fast speed in the process of descending, can be avoided. A pressure pickup can check load gravity of the fork. The digital CPU can further optimize falling accelerated speed of the fork.

The invention discloses a dust collector with the function of being automatically turned off when toppling over or being filled with water. The dust collector comprises a negative pressure toggle device (1), a floating bowl (2), a switch (3), a machine head (4) and a dust collection drum (5). A device composed of the negative pressure toggle device, the floating bowl and the switch is arranged in the machine head of the dust collector, the floating bowl is arranged below an air inlet of a fan inside a filter support, the negative pressure toggle device and the switch are arranged at the upper left portion of the machine head, a bypass air flue is arranged inside the machine head, one end of the bypass air flue is communicated with the negative pressure toggle device, and the other end of the bypass air flue is communicated with the air inlet of the fan. When the dust collection drum is nearly filled with sewage, the floating bowl floats along with the water level to the portion near the air inlet, negative pressure airflow lifts the floating bowl to seal the air inlet, negative pressure jerking motion is generated inside the bypass air flue, the negative pressure jerking motion airflow opens a circuit in the mode that the negative pressure toggle device triggers the switch, and a motor is stopped; when the dust collector topples over, the toppled floating bowl seals the air inlet under the action of the negative pressure airflow, in the same way, the circuit is opened, and the motor is stopped. According to the technical scheme, the dust collector can be used for collecting dust and can also be used for removing muddy water, and is multifunctional and wide in application range.

The invention belongs to the field of a tool rest for a numerically-controlled machine tool, and in particular relates to a single-servo power tool rest. In the invention, a tool disk and a power tool are driven by the same servo motor, and the power switchover problem of the tool rest is solved by a sliding gear clutch, wherein, the servo motor is connected with a power input shaft through a moment limiter, the tool disk is transposed through secondary gear transmission, and the power tool is driven by tertiary gear transmission; and the working conditions of the clutch, a triple fluted discand the power tool are controlled by a hydraulic system. Compared with the common servo power tool rest, the single-servo power tool rest has the advantages of low cost, light weight, small volume and the like, and adds an overload protection function.

The invention relates to an inner closed type radial flux magnetic transmission mechanism for an underwater direct-driven propeller. According to the inner closed type radial flux magnetic transmission mechanism for the underwater direct-driven propeller provided by the invention, the opening end of the inner circumference surface of an outer rotor iron core (1) is equipped with multiple dovetail slots II (12) along a radial direction; the multiple dovetail slots II (12) are evenly distributed along the inner circumference surface of the outer rotor iron core (1); a piece of outer rotor magnetic steel (2) is matched and fixed in each dovetail slot II (12); an inner rotor end plate (10) is annularly sleeved on the prime motor rotation shaft (9) of the propeller and is fixedly connected with the outer end of an inner rotor magnet yoke (5); an outer rotor end plate (8) is fixedly connected with the outer end of the outer rotor iron core (1); the opening end of an isolation sleeve (3) is equipped with a connection flange plate (16); and the connection flange plate (16) of the isolation sleeve (3) and a propeller end plate (7) are in sealed connection. The mechanism provided by the invention is applied in the underwater direct-driven propeller.

The invention provides a protective circuit of a power amplifier tube, a method of the power amplifier tube and the power amplifier tube. The protective circuit of the power amplifier tube comprises the power amplifier tube, an input end of the power amplifier tube is connected with an input end of a radio-frequency signal, a drain electrode or a collector of the power amplifier tube is connected with a first power supply (VDD) end, and an grid electrode or a base of the power amplifier tube is connected with a second power supply (VGC) end. The protective circuit of the power amplifier tube further comprises a transient current detector and a controller, wherein the transient current detector is located between the drain electrode or the collector of the power amplifier tube and a direct current power supply end and is used for detecting in real-time the current when the power amplifier tube works, and the controller is connected with the transient current detector and is used for cutting off the radio-frequency signal which is input into the power amplifier tube or controlling the cutting-off of the power amplifier tube when the current detected by the transient current detector is larger than a preset limit value. The protective circuit of the power amplifier tube, the method of the power amplifier tube and the power amplifier tube can avoid injury caused by overload of the power amplifier tube.

The invention discloses a device capable of automatically adjusting the rigidity of a flexible blade of a wind turbine. The device aims at mainly solving the technical problems of easy fatigue and damage and the like in the existing flexible blade. The device is charachterized in that the two ends of an extension spring (8) and a compression spring (9) are respectively connected with a front-end fixed block (5) and a moving inertial block (4) embedded in a linear guide rail (10); one end of each steel wire rope (6) is connected with the inertial block (4); the steel wire rope (6) bypasses a fixed pulley (3) fixed on a supporting block (2), and then penetrates through the front-end fixed block (5) to be connected with a tail-end fixed block (7); two steel wire ropes (6) are symmetrically distributed at the two sides of the inertial block (4). The device disclosed by the invention has the advantages that the structure is simple, the manufacture and the maintenance are convenient, the rigidity of the flexible blade of the wind turbine can be automatically adjusted along with the change of wind speed. In addition, the device has the advantage of expanding the wind-speed range for operation of the wind turbine, and is mainly used for the field of blades of wind-power generation equipment.

The invention relates to a roller pelletizer for sludge ceramsite granulation and belongs to the technical field of pelletizing equipment. In order to solve the problems of low efficiency and high energy consumption at present, the invention provides the roller pelletizer for sludge ceramsite granulation. The roller pelletizer comprises a frame, a driving mechanism, a driving roller and a driven roller, wherein the driving roller is arranged on the frame in a rotatable form through a first rotating shaft; the driven roller is arranged on the frame in the rotatable form through a second rotating shaft; the driving roller and the driven roller are horizontally arranged; a plurality of through holes are formed along the circumferential directions of the roller walls of the driving roller andthe driven roller; the driving mechanism is capable of driving the first rotating shaft to drive the driving roller to rotate; a flywheel is fixed on the second rotating shaft of the driven roller; the flywheel is located on the outer side of the driven roller. The through holes and the flywheel are arranged, so that the overload damage of the power source, such as a motor, in the driving mechanism can be avoided, the energy-saving effect can be achieved, the sludge ceramsite can be prevented from attaching to the through holes, the pelletizing efficiency is increased and the performance of quickly pelletizing can be realized.

The invention provides a table-typed tool, comprising a base (1), a workbench (2), a machine arm (3) and a working head (4). At least a group of slight adjusting transmission mechanism and locking device are arranged between the base (1) and the workbench (2) or between the machine arm (3) and the workbench (2); furthermore, the slight adjusting transmission mechanism is driven to rotate by a slight adjusting motor (5); each group of slight adjusting transmission mechanism and locking device comprise a motor protection device (9, 10, 11); when the locking device is in locking state, the motor protection device (9, 10, 11) can avoid the overloading of the slight adjusting motor (5).

The invention discloses a diverting and converging system based on multi-directional sorting wheels. The diverting and converging system comprises a main conveying line, wherein the main conveying line is connected with a friction driving type sorting wheel conveying line in a matched mode, the output end of the sorting wheel conveying line is connected with a first branch conveying line and a second branch conveying line which are parallel, and in a converging state, axes of the sorting wheels in the sorting wheel conveying line are parallel to driving rollers in the sorting wheel conveying line, wherein the driving rollers drive the sorting wheels to rotate through friction; and in a diverting state, the axes of the sorting wheels in the sorting wheel conveying line keep included angleswith the driving rollers, and the conveying direction of the sorting wheel conveying line can be switched between facing the first branch conveying line and facing the second branch conveying line. According to the scheme, the characteristic that the sorting wheels of the sorting wheel conveying line can freely turn is fully utilized, so that diverting or converging operation is realized, objectsare not damaged in the diverting process, the movement of the objects is not hindered in the converging process, and the combination of the high safety and the high efficiency are effectively realized.

The invention discloses an active thrust balance type shafting longitudinal vibration reduction device. The active thrust balance type shafting longitudinal vibration reduction device comprises a shell, a thrust block mounted in the shell, a longitudinal vibration reduction structure opposite to the thrust block, a hydraulic pipeline configured with the vibration reduction structure, a hydraulic machine and a thrust detection control module, wherein the shell is mounted on a thrust shaft in a sleeving manner, and the shell and the thrust shaft are configured in a sealed manner. The thrust block and the thrust shaft are connected in an abutting manner. The longitudinal vibration reduction structure comprises a piston cylinder, a piston rod, a vibration reduction element and a piston cylinder end cover. One end of the piston rod stretches out of the piston cylinder and is connected with the thrust block in an abutting manner, and the other end of the piston rod is arranged in the pistoncylinder. One end of the vibration reduction element is connected with the piston rod in an abutting manner, and the other end of the vibration reduction element is connected with the piston cylinderend cover in an abutting manner. By means of the device, counter equivalent static thrust is provided in a cabin, static thrust brought by a propeller and deepwater pressure to shafting is compensated, the vibration reduction element only transmits and attenuates pulsation exciting force of the proper, and longitudinal vibration control over a propeller shaft system is expanded to large amplitudeand low frequency.

The invention relates to a film disc coupler with an overload protection function. The film disc coupler can be applied to power transmission devices in aero-engines and marine engines. The film disccoupler comprises symmetrically-distributed connecting shafts (1), an integrated knuckle bearing (2), a flange plate (3), a switching section (5), a connecting bolt (6), an interval shaft (7), an adjusting mat (8), an inner shaft (9), a gland nut (10), a locking sheet (11), a protection outer cover (12), a bearing ring (13), a clamp set (14), a self-locking nut (15), an outer installing shaft (16), a connecting screw (17) and a locking sheet (18). On the basis that the common working condition of the film disc coupler is met, a bearing supporting structure is designed, a certain axial force load can be borne, a protection structure is designed for torque overload and deflection angle compensation overload conditions during work of the film disc coupler, the overload protection function isachieved, and the film disc overload damage can be effectively avoided.

The invention provides a forklift fork arm with a weighing function. The forklift fork arm comprises two strip-shaped inserting teeth, two fixed columns, a connecting cross beam, two strip-shaped bearing plates and a data collection box. A power module, a controller, an A / D collection module and a wireless transmitting module are arranged in the data collection box. By means of the forklift fork arm, the strip-shaped bearing plates are firstly in contact with the lower portion of a cargo support, pressure sensors collect pressure data, the pressure data are collected by the A / D collection module and provided for the controller, the controller calculates the cargo overall weight according to the collected data, and the cargo overall weight is compared with a set weight threshold value; andif the weight is larger than the set weight threshold value, alarm information and weighing data are transmitted through the wireless transmitting module, and therefore overload damage of the forkliftfork arm is effectively avoided.

The invention relates to the automobile spare tire external support field, particularly to a spare tire protection and lifting fixing device. The spare tire protection and lifting fixing device comprises a mounting support assembly, a transmission mechanism assembly, a pallet assembly and a steel wire rope. The mounting support assembly comprises a large support, a small support and a transmission pipe, wherein the large support and the small support are fixedly connected to an automobile body and fixedly connected through the transmission pipe; the transmission mechanism assembly is fixedly mounted on the large support, a main shaft in the transmission mechanism assembly is drivingly connected with a transmission disk which is connected with an inner gear disk through gear transmission, and the outside of the inner gear disk is provided with a wire slot; and one end of the steel wire rope is connected with the pallet assembly, the other end of the steel wire rope penetrates through the transmission pipe and is connected with the wire slot of the inner gear disk in a winding mode, and the disk piece of the inner gear disk is provided with lightening holes. According to the spare tire protection and lifting fixing device, the transmission mechanism is reasonable, the weight of moving parts can be lightened through the lightening holes, and labor-saving operation and smooth and stable transmission are achieved.

The invention discloses a dynamoelectric linear actuator with a sealing and lubricating, shock-absorbing and overload protection structure. The dynamoelectric linear actuator comprises a motor, a sliding sleeve, a screw rod and a threaded sleeve matched with the screw rod; a rubber buffer cushion is arranged between the sliding sleeve and the end plane of the threaded sleeve; and an electric cylinder also comprises a corrugated extension tube, a pull pressure sensor and a controller. According to the dynamoelectric linear actuator, the screw rod is sealed through the corrugated extension tube, so that the problem that the screw rod is rusted and damaged due to the contact between steam and the screw rod can be avoided; by setting the rubber buffer cushion between the sliding sleeve and the threaded sleeve, the axial impact force on a thread pair of a screw rod mechanism can be buffered so as to avoid the damage of the thread pair caused by the axial impact force; and by setting the pull pressure sensor in the end part of the sliding sleeve, when the pull pressure sensor detects that the load of the electric cylinder is increased to the ultimate load, the controller controls the motor to stop working so as to perform the overload protection on the electric cylinder to avoid the overload damage of the electric cylinder and to prolong the service life of the electric cylinder.

The invention discloses a self-resetting viscous damper based on a combined spring. The damper comprises a viscous damping energy dissipation device, a spring resetting device and a force transmission device, the viscous damping energy dissipation device is in linkage with the spring resetting device through the force transmission device, and the force transmission device comprises an outer force transmission component and an inner force transmission component. The outer force transmission component comprises a barrel, the viscous damping energy dissipation device and the spring resetting device are both installed in the barrel, the inner force transmission component is a guide rod, the guide rod is arranged in the axial direction of the barrel, and a piston in the viscous damping energy dissipation device is fixedly connected to the guide rod. The spring resetting device comprises a resetting spring piece and two bearing plates arranged at the two axial ends of the resetting spring piece respectively, and the resetting spring piece and the bearing plates are connected to the periphery of the guide rod in a sleeving mode and can slide relative to the guide rod. The damper is excellent and controllable in self-resetting capability, can stably consume energy under high and low frequency excitation, has an overload protection characteristic, is symmetrical in tension and compression performance, is convenient to assemble, and is easy to disassemble and maintain.

The invention relates to a current limiting power amplification driving circuit for power line carrier communication, which is used for realizing power amplification of a power line carrier sending signal and is coupled to a power line. The current limiting power amplification driving circuit is characterized by comprising a current limiting block input circuit, a first-stage bias amplifying circuit, a second-stage current limiting amplifying circuit, a third-stage power driving circuit, a feedback circuit and a power line carrier signal coupling circuit. The current limiting block input circuit in the circuit realizes current limiting protection over the power amplifier current input stage; the base voltage lower limit of a triode Q4 in the third-stage power driving circuit is improved by the second-stage current limiting amplifying circuit, and the maximum base current of the triode Q4 is limited, so that the power amplifier circuit is prevented from entering a working dead zone where the Q4 is connected all the time; the second-stage current limiting amplifying circuit has a current limiting effect on the third-stage power driving circuit, so that the triode therein is prevented from being damaged due to overload; and the circuit is suitable for a variable carrier load impedance condition in an actual application field.

The invention discloses a weighing-free AI intelligent identification truck overload estimation method, device and system. The method comprises the steps: firstly, obtaining the average deformation coefficients of rear wheel truck tires of the same type of vehicles under different load capacities, and carrying out fitting to obtain a statistical data linear regression function model that the corresponding average deformation coefficients of the tires change along with the change of the load capacities; determining a truck load upper limit value and a multiple load value according to the trucktype, and substituting the truck load upper limit value and the multiple load value into the function model to obtain a corresponding truck overload tire deformation coefficient value and a multiple overload deformation coefficient value; and when the vehicle to be detected passes through the video detection point, calculating the average deformation coefficient of the rear wheel truck tire according to the deformation horizon length of the rear wheel tire and the radius of the truck tire, comparing the average deformation coefficient with a correlation numerical value, and judging whether thevehicle is an overload or multiple overload suspected vehicle. The invention aims to solve the problems of low cost, no lane guidance, no-dead-corner deploying and controlling intelligent monitoringoverload of various levels of highway networks, especially severe overload vehicles, in the aspects of technicality and economy.

The invention discloses a wall repainting device for indoor decoration. The wall repainting device for indoor decoration comprises a main storage shell; a bottom mounting base plate is arranged on theside surface of the main storage shell; and the main storage shell and the bottom mounting base plate adopt an integrated structure. Pressure is applied to liquid painting coating by air pressure with controllability, so that the liquid coating is ejected from a high-pressure ejecting gun, the ejected mist-shaped whitewash can cover the wall surface rapidly, the labor intensity is reduced and thewhitewash efficiency is improved; furthermore, the device is provided with a control mechanism for preventing the air pressure intensity from being too high, so that the non-uniform ejecting phenomenon caused by too high injected air pressure can be effectively avoided; in addition, the device is provided with a control mechanism for preventing overload of an electromotor and can effectively prevent the phenomenon that the electromotor is overloaded and damaged caused by too high air pressure; and the device is provided with a middle clamping and inlaying mechanism, can realize butt joint effect and can guarantee that air leakage of a butt joint part is avoided, so that injection of raw materials and cleaning of the internal parts of parts are realized and the practicability is high.

The invention discloses an overlapping quantity pneumatic measuring device and method of a large-flow electro-hydraulic servo valve. The overlapping quantity pneumatic measuring device is mainly composed of a valve seat pressing air cylinder, a differential pressure type flow meter, a tension pressure sensor, an electric translation table, a valve sleeve push-out air cylinder, a valve sleeve ejector rod, an air distribution seat, an auxiliary ejector rod, a sliding valve assembly, a guide seat, a valve seat pressing rotating air cylinder, a displacement sensor, a displacement sensor horizontalmoving air cylinder, a sliding block guide rail, a valve element clamping air cylinder and the like; According to the method, an overlapping quantity pneumatic comprehensive measuring method of a pressure type measuring gas path and a flow type measuring gas path is mainly adopted. The overlapping quantity pneumatic measuring device has the advantages that under the premise that the overlapping quantity measuring precision and repeated precision requirements of the large-flow electro-hydraulic servo valve are met, the overlapping quantity measurement of large-flow sliding valve pairs with various size specifications can be achieved, the measuring automation degree and the testing efficiency are greatly improved, and the skill requirements of operating workers are reduced.

The invention discloses white smoke removal equipment for flue gas from an exhaust chimney of a chemical plant. The white smoke removal equipment structurally comprises a suction fan, a flue gas treatment device, a flue gas white smoke removal machine body, a flue gas inlet, a drain outlet and supporting legs, wherein the suction fan is mounted at the inner top of the flue gas white smoke removalmachine body; and the flue gas treatment device connected with the flue gas white smoke removal machine body is arranged below the suction fan. Compared with the prior art, the invention has the following beneficial effects: water and particles can be quickly separated, so cyclic utilization of water and collection of particles are facilitated; a shaking head moves up and down, so up-and-down shaking of filter screen is realized, and thus, the filter screen can be effectively prevented from being blocked, timely drainage of water is realized, flowing of water is prevented, and particles can slide down from high potential to low potential and are discharged from the drain outlet; and by additionally arranging a flue gas uniform-dispersing plate, flue gas can uniformly ascend and diffuse, the phenomenon that a water uniform-spraying device is blocked due to accumulation of the flue gas at one position is avoided, particles can uniformly fall onto the high-strength filter screen, the phenomenon that the filter screen is overloaded and damaged due to concentrated falling of the particles fall onto a certain position of the filter screen is avoided, and the filter screen is further prevented from being blocked.

A high-pressure filtering station solves the problems that replacement of a filter element or maintenance of a control valve is difficult under a main body in a filter cartridge or the control valve of a traditional high-pressure filtering station and that high-pressure liquid is fully filled with a combined surface and jets outwards if the sealing between the control valve and the main body is failed. The high-pressure filtering station is characterized in that the filter cartridge is arranged above the main body; the control valve is arranged on the lateral surface of the main body; a liquid inlet trench though hole, a liquid outlet trench through hole, a sewage discharging trench through hole, an annular unloading groove and a linear unloading groove are formed in a valve body of the control valve by processing; a liquid inlet hole, a liquid outlet hole, a sewage discharging hole, a control valve liquid inlet trench through hole, a control valve liquid outlet trench through hole and a control valve sewage discharging trench through hole are formed in the main body by processing; and spare parts arranged in the valve body of the control valve can temporarily form an integrally-inserted valve core. The high-pressure filtering station has the beneficial effects that the replacement of the filter element or the maintenance of the control valve is easily realized; the phenomenon that a large amount of liquid is sprayed due to the fact that a sealing element is damaged is avoided; the liquid passes through a large channel; the flowing resistance of fluid is reduced; and the problem that the liquid in a main liquid supply pipeline flows outwards due to the fact that a work surface stops pumping is solved.

The invention discloses a train dead-hooking treatment system and method. The train comprises a plurality of heavy train sets. The train dead-hooking treatment system comprises a train dead-hooking alarming device and a control device, wherein the train dead-hooking alarming device is used for sending signals which express a dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets; the control device is connected with the train dead-hooking alarming device, and is used for receiving the signals which express the dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets, and controlling a positioning car to stop in the condition that the signals which express the dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets are received; and the positioning car is used for drawing and positioning the heavy train sets. With the adoption of the dead-hooking treatment system and the train dead-hooking treatment method, not only can the defects in the prior art of components damaged by overloading and train off-the-road and turnover phenomena be avoided, but also the huge impact brought about by scram of each component in a high-speed operation state can be avoided, the security of equipment can be ensured, and the fault treatment efficiency further can be improved.