89results about How to "Solve the failure rate" patented technology

The invention discloses an uninterrupted power supply system, which comprises a main power supply, a bypass power supply, at least two power modules, at least one battery pack, a monitoring module, a manual maintenance switch, an output switch, wherein the power modules are connected in parallel and connected to a load through the output switch; the bypass power supply is connected to the load through the manual maintenance switch. The invention reduces consumption and cost of the system, and reduces failure rate of the system.

The invention relates to a centralized operation and maintenance platform for sewage treatment of the Internet of Things. The centralized operation and maintenance platform comprises a data center and a plurality of field sewage treatment monitoring equipment; the data center comprises a remote server and a PC and a short message alarm gateway which are respectively electrically connected with the remote server; the short message alarm gateway is wirelessly connected with a plurality of intelligent mobile devices; any one field sewage treatment monitoring equipment comprises a field industrial personal computer, a camera, a programmable logic controller PLC, a GPRS / 3G data acquisition terminal and a GPRS / 3G video gateway; the GPRS / 3G video gateway is wirelessly connected with the remote server and used for transmitting a sewage treatment field image acquired by the camera to the remote server; and the GPRS / 3G data acquisition terminal is electrically connected with the field industrial personal computer and the programmable logic controller PLC, and wirelessly connected with the remote server and used for forwarding working condition data of sewage treatment equipment transmitted by the field industrial personal computer or the programmable logic controller PLC to the remote server. Through the technical scheme of the invention, the real-time intelligent monitoring of the sewage treatment can be realized.

The invention relates to a magnetic suspension falling body cabin system and a free falling body type absolute gravimeter of the falling body cabin system. The falling body cabin system comprises a vacuum chamber and a falling body cabin arranged in the vacuum chamber, wherein the falling body cabin comprises a top tray, a bottom tray, a guide rail, a support rail, a bracket system and a falling body mass block; the guide rail and the support rail are arranged between the top tray and the bottom tray; at least one end of the guide rail is provided with a driving electromagnetic valve, and the bottom of the falling body bay is provided with a sensor; a sliding sleeve is sheathed on the guide rail, the driving electromagnetic valve is arranged in the sliding sleeve, and the bracket system is installed on the guide rail in a sliding mode through the sliding sleeve; the bottom wall of the top tray is provided with a guide locating slot in the movement direction of the bracket system, and the upper part of the guide locating slot is provided with an electromagnetic collet; the falling body mass block is separably arranged on the bracket system; the top of the falling body mass block is provided with a guide bar which can extends into the guide locating slot; and the falling body mass block is provided with a corner cube. The magnetic force in the electrified electromagnetic valve is used as the driving force of the bracket system, and the magnitude of current is controlled to control the movement of the bracket system. Thus, the invention has the advantages of high precision and low failure rate.

A submersible electrohydraulic control gate valve for mining is provided with a pull weight board which is connected with a gate valve lead screw and an electrohydraulic control system, wherein the electrohydraulic control system comprises an anti-explosion submersible electrical machine which is connected with the gate valve lead screw by an airbag type hydraulic actuator; the pull weight board is connected with the gate valve lead screw by a lead screw connecting rod through corresponding thread, a lock nut locks the pull weight board and the lead screw connecting rod, the lead screw lock nut limits the position of the lead screw connecting rod in the connection of the lead screw and the lead screw connecting rod; and the gate valve is connected with a gate valve wedge plate by the gatevalve lead screw through a T-shaped groove. In the invention, complicated mechanical drive structures are not used, the explosion-proof electric machine is used as a power source, the hydraulic control system is used to drive an oil cylinder and the problems that manual and electric gate valves have bad reliability and high failure rate because the lead screw is used for rotating can be solved, the normal operation of a drainage system can be ensured. The submersible electrohydraulic control gate valve has high reliability and can carry out underwater operation for a long time.

The invention relates to a pond culture water quality monitoring system and a pond culture water quality monitoring method, in particular to a pond culture water multi-parameter acquisition system and a pond culture water multi-parameter acquisition method. The pond culture water multi-parameter acquisition system comprises a water quality data acquisition node and an on-site wireless communication network, wherein the on-site wireless communication network is based on Institute of Electrical and Electronics Engineers (IEEE)802.15.4 communication protocol; the network node of the on-site wireless communication network comprises a personal area network (PAN) coordinator, a full-function device (FFD) and a reduced-function device (RFD); the on-site wireless communication network is constructed into star topology and peer-to-peer network topology; and the data acquisition node comprises a water quality sensor and a wireless network transceiver, and after receiving sensor data, transmits water quality data to a wireless network periodically. In the invention, water quality data can be acquired in a large-scale culture fish pond in real time for regulating the quality of the water in the culture pond and automatically controlling on-site equipment.

The invention provides a driving device and a driving mechanism of a guide plate of a moving double-box electric lifting appliance of a container; the driving device comprises a planet speed reducing motor and a gear transmission mechanism driven by the planet speed reducing motor; the gear transmission mechanism comprises a power output gear, a clutch and a power output gear shaft; the power output gear is connected with the power output gear shaft by the clutch; the power output gear shaft is further used for connecting a guide plate; when the load subjected by the power output gear shaft exceeds a preset torque, the clutch enables the power output gear and the power output gear shaft to slide relative to each other; when the load subjected by the power output gear shaft is lower than the preset torque, a moment is transmitted between the power output gear and the power output gear shaft by the clutch.

The invention provides a hermetic feeder for a vertical mill. The feeder comprises a mill feed belt, a blanking pipe, a blanking straight pipe, a horizontal insertion plate and a negative pressure meter, wherein the blanking pipe is arranged below the mill feed belt; the blanking straight pipe is connected below the blanking pipe; the horizontal insertion plate is arranged in the middle section of the blanking straight pipe; the length of the horizontal insertion plate stretching into the blanking straight pipe can be adjusted by an actuating mechanism, so that a blanking space is formed by agap between the horizontal insertion plate and the blanking straight pipe and is used for materials to pass through; and the negative pressure meter is arranged above the blanking pipe, is connected with an automatic control system and a central controller, and is provided with an upper limit value and a lower limit value, so that negative pressure starts dropping from a normal value when the blanking straight pipe is blocked, the automatic control system makes the actuating mechanism start acting to open the horizontal insertion plate when the negative pressure reaches the lower limit value,the negative pressure rises due to automatic dredging of material scouring, the automatic control system makes the actuating mechanism close the horizontal insertion plate when the negative pressure reaches the upper limit value, and the negative pressure is restored to the normal value.

The invention discloses a bar continuous rolling production line, relates to the field of bar rolling devices, and provides the bar continuous rolling production line which is suitable for producing fine-grained reinforcing steel bars through the bar segmenting method. The bar continuous rolling production line comprises a rough and intermediate rolling unit, an intermediate and finish rolling temperature control and cooling system, a finish rolling unit and an after-rolling processing unit. The finish rolling unit comprises a horizontal rolling machine, a vertical rolling machine, a pre-cut process rolling machine, a segmenting process rolling machine, an ellipse process rolling machine, a circle process rolling machine, a finish rolling temperature control and cooling system, a before-forming process rolling machine and a product finishing process rolling machine. The bar continuous rolling production line can be applied to the bar continuous rolling production line design and can be used for improving an existing rolling machine as well.

The invention discloses Bluetooth-based online banking safety equipment and a data communication method thereof. The online banking safety equipment comprises an encryption module, wherein the encryption module is in wireless communication connection with external equipment via a Bluetooth module. On the basis of the equipment, the invention also discloses a data communication method for the Bluetooth-based online banking safety equipment. The data communication method comprises the following step of carrying out data exchange between the online banking safety equipment and the external equipment in a Bluetooth communication mode. According to the method disclosed by the invention, the defects that a data connection line is frequently plugged and unplugged due to the traditional USB (universal serial bus) interface and data communication mode, and the traditional USB mode is not suitable for mobile equipment are avoided, and the invention has the advantages of wide application range and convenience in use.

The invention relates to coal-charging and coke-discharging flue dust collecting and purifying device of a coke oven. A coal-charging flue dust collecting device at the machine side is used for collecting and delivering flue gas dissipated at an oven door when coal is charged, and a flue dust collecting and processing vehicle arranged on the oven top is in butt joint with a special coal-charging flue gas transmitting belt trolley to deliver flue dust dissipated at air discharging holes on the oven top; flue dust dissipated during discharging coke is collected and delivered through a coke side belt sealing air pipe arranged at the outer side of a track of a coke quenching car at the coke-discharging side of the coke oven; the flue gas dissipated at the oven door is delivered to the coke side belt sealing air pipe through a pipeline, the flue dust dissipated at the air discharging holes on the oven top is delivered into the coke side belt sealing air pipe through a gas guiding pipe, and the flue gas and the flue dust are together delivered into a ground dust removing station through a pipeline of an output port of the coke side belt sealing air pipe for purification. The device has the advantages of favorable flue dust gathering effect, high degree of the automation and convenient operation and can continuously, safely and stably run.

The invention relates to a wide dump truck, which comprises a driving cab (1), a truck frame (2), a power assembly (3), a transmission system (4), a steering system (5), brake systems (6), a front suspension (7), a back suspension (8), a lifting system (9), a carriage (10) and electrical systems (11), wherein the driving cab (1) is arranged at the upper side of the front part of the truck frame (2), the power assembly (3) is arranged in the inner side of the truck frame (2), the transmission system (4) is arranged in the inner side of the truck frame (2), the steering system (5) is arranged at the inner side and the outer side of the truck frame (2), the brake systems (6) are arranged in the inner and outer sides of the truck frame (2), the front suspension (7) is arranged at the lower side of the front part of the truck frame (2), the back suspension is arranged at the lower side of the middle back part of the truck frame (10), the lifting system (9) is arranged at the upper side of the truck frame, and is connected with the carriage (10), the carriage (10) is arranged at the upper side of the truck frame (2), and the electrical systems (11) are arranged in the inner and outer sides of the truck frame (2). The wide dump truck has the advantages that the defects of the previous wide dump truck are overcome, and a new design platform is provided for the development of large-tonnage wide trucks.

The invention belongs to a valve, in particular to a flow separation, pressure adjustment and speed adjustment reversing integrated valve. The integrated valve comprises a valve body, an oil inlet andoverflow valve arranged on the valve body, and a pilot pressure adjusting, throttling switching and speed adjusting unit; the valve body is provided with an oil return port, a throttling oil outlet and an oil outlet; an overflow back pressure cavity, an oil outlet cavity, an oil inlet cavity, a throttling oil outlet cavity and a liquid control cavity, axially penetrating through a main hole, arearranged in the valve body at intervals; the throttling oil outlet cavity communicates with the throttling oil outlet; the oil outlet cavity communicates with the oil outlet; the oil outlet cavity communicates with the liquid control cavity by a liquid control hole way; an overflow main valve sleeve is inserted in the main hole to form dynamic seal fit, the outer end thereof is assembled with an outer end stop port of the main hole, and the inner end thereof is provided with a throttling port; and in a non-working state, the overflow main valve sleeve separates the oil inlet cavity from the oil outlet cavity. The integrated valve effectively solves the technical difficulties of high energy consumption, high working medium temperature rise and the like in the prior art, and has the advantages of capability of respectively driving multiple execution elements with different working pressures and flows, lower grade requirement on system modules, capability of realizing speed adjustment andthe like.

The present invention discloses method of combining wind power and hydropower for generating, and features that wind power and hydropower are combined through the following steps: utilizing wind power with water lifting device to lift water to high place; making water flow down to drive hydropower generator to generate electricity; and repeated the foregoing steps. The present invention is superior to available wind power generation, which has high cost, high fault rate and contamination on power network, and may be used alone or as the supplement of hydropower generation.

The invention discloses an excitation input voltage dynamic adjustment method for an aerial three-level variable-frequency alternator, and belongs to the technical field of digital voltage adjustment.According to the technical scheme, a three-phase PWM controllable rectifying circuit is adopted for adjusting excitation input voltage, and during adjustment, a method for changing a voltage reference valve in real time according to rotation speed is created. When the excitation input voltage dynamic adjustment method is applied to the aerial three-level variable-frequency alternator, the excitation input voltage can be dynamically adjusted according to the current rotation speed. Especially under high rotation speed, by adopting the technical method for lowering the excitation input voltage,the requirements of a power pipe for switching characteristics are reduced. In a digital voltage adjustment technique of the aerial three-level variable-frequency alternator, the excitation input voltage is dynamically adjusted, and the overshoot phenomenon of unloaded transient voltage can be effectively alleviated when a motor runs at full rotation speed.

The invention discloses a preparation method of a multi-chip parallel illumination module. The method comprises following steps of (1), preparing N-electrode bonding pads; (2), preparing P-electrode bonding pads; (3), evaporating electrode metal, thus forming a whole module P electrode, chip unit P electrodes and N electrodes; (4), cutting to an N-type GaN layer; (5), testing photoelectric parameters; screening chip units with bad parameters; (6) filling up cutting slots; (7), removing the metal on the surfaces of the chip units; and preparing leads on the whole module P electrode and N electrode, thus obtaining the multi-chip parallel illumination module. According to the method provided by the invention, the packaging difficulty is greatly reduced; the evenness of the chips is consistent; the stability of the packaged chips is improved; the P electrode bonding pads and the N electrode bonding pads on the surfaces of the chip units are removed, therefore, the light shielding area resulting from the connection wires on the bonding pads is reduced; the light-emitting strength of the chips is improved; moreover, in the preparation process, the chip units are tested in advance; the chip particles with bad parameters are eliminated; and the method has actual applicability and operability.

The invention provides a novel multifunctional tea packaging machine which comprises a framework. The framework comprises a workbench, a packaging chamber, an inner film chamber, a vacuum pumping chamber, a control chamber and an equipment chamber. A feeding device, a weighing device, a guide device, a tea filler, an inner film opening two-side sealing device, an inner bag transferring mechanism,an inner bag guide discharge mechanism, an outer bag clamping and opening mechanism, an outer bag loading auxiliary supporting device and a switching device are arranged in the packaging chamber. An inner film feeding device is arranged in the inner film chamber, a vacuum pumping device and an outer bag sealing mechanism are arranged in the vacuum pumping chamber, an air compression system and a vacuum pump are arranged in the equipment chamber, a PLC is arranged in the control chamber, the feeding device, the weighing device, the guide device and the inner film opening two-side sealing deviceare sequentially arranged from top to bottom, and the inner film opening two-side sealing device, the inner bag transferring mechanism, the inner bag guide discharge mechanism and the outer bag clamping and opening mechanism are sequentially arranged from left to right.

At present, self-service equipment business handling machines of business halls of various industries are low in intelligent degree, manual assistance is set beside self-service equipment as remedialmeasures for most business halls; but the labor cost is high, the business time is fixed, and the multi-aspect requirements of users cannot be met. Therefore, the invention provides an auxiliary interaction method and device for self-service equipment. A human body induction module is used for detecting a user; a voice collecting and processing unit, ta voice recognition processing engine and a semantic analysis processing engine are used for analyzing and processing the voice of the user to provide answers to consulting questions, process demonstration instructions of business processes or remote guidance of the seat terminal personnel for the user. According to the method, multiple interaction ways are used for assisting the main screen of the self-service equipment, basic functions of the main screen are expanded, artificial intelligence upgrading of the main screen of the self-service equipment is completed through the expanded functions, the labor cost is reduced, and the user experience is improved.

The invention discloses a variable-stroke separate high-speed hydraulic rammer compactor, which comprises a compacting frame, a compacting foot, a compacting hammer, a hydraulic cylinder, a hydraulic control circuit and an electric control circuit, wherein the top of the compacting hammer is provided with a cavity; a set of cam type locking and releasing mechanism is arranged in the cavity; the cam type locking and releasing mechanism comprises a pair of eccentric cams, two torsional springs and two camshaft shifting forks; the bottom of a hydraulic cylinder piston rod is provided with a connector; the outer rotary surfaces of the cams are provided with a circle of circular-arc grooves, so that a channel is formed between the cams; the channel is aligned with the vertical direction of theconnector; the compacting frame is provided with two shifting fork carrier rods along the vertical direction; and the two fork shifting carrier rods are aligned with the triggering ends of the two camshaft shifting forks in the vertical direction. A hydraulic driving system in the invention is easy to control, the hydraulic system and the entire structure of the rammer compactor are greatly simplified, the overall cost is greatly lowered, and the reliability and the stability of the rammer compactor are improved.

The invention provides a scrubber base for containing a scrubber. The scrubber comprises a mainframe, a drive mechanism, a cleaning mechanism and a balance steering mechanism; the drive mechanism comprises a edge wheel set, the cleaning mechanism comprises a water tank, a rolling brush and a scraping strip, and the balance steering mechanism comprises a universal wheel set; the scrubber base comprises a base body and a boss protruding out of the top face of the base body; the invention further provides a scrubber set. By arranging the boss on the base body, the mainframe is ejected by the boss, springs in the balance steering mechanism and the drive mechanism can be naturally stretched to rest, the surface of the rolling brush and the edge of the scraping strip can obtain the space to be recovered to the original state, and therefore the technical problems that due to the fact that the scrubber is not correctly stored, the springs inside the balance steering mechanism and the drive mechanism are fatigue and lose efficacy, the surface of the rolling brush and the edge of the scraping strip deform, the cleaning effect of the scrubber is poor, the fault rate is increased, and the service life is shortened are effectively solved.

The invention discloses an intelligent underground parking system of shared bicycles, and belongs to the field of municipal public facilities. The intelligent underground parking system mainly comprises an intelligent control device, an overground parking and picking-up garage, eight parking devices and a power supply device; an underground parking space is formed below the overground parking andpicking-up garage, a rail shaped like the Chinese character 'mi' is laid taking the overground parking and picking-up garage as the center, and the eight parking devices are distributed on the rail; hydraulic lifting rods are arranged on the upper parts of the parking devices, electric rotating devices are fixed to the hydraulic lifting rods in a welded mode, parking discs are arranged on the upper parts of the electric rotating devices, and parking grooves are fixed into the parking discs; and parking piles are located in the centers of the parking devices, grooves are formed in the side faces of the parking piles, and locking wheel devices and sensing devices are arranged in the grooves. According to the intelligent underground parking system, the problems that people are inconvenient due to random parking of the shared bicycles and ground resource occupation, and fixed parking places of the shared bicycles are difficult to find are solved; and the problems that the shared bicycles are exposed to the sun and rain for a long time, consequently the failure rate is excessively high, and supervision is difficult are solved for shared cycling enterprises.

The invention discloses a fully automatic multifunctional intelligent terminal and a method thereof for processing express delivery, belonging to the technical field of intelligent terminals of Internet of things, wherein the adopted cabinet is an all-metal fully enclosed cabinet, which is connected to the Internet by a Wi-Fi module; the obtained express delivery information is transmitted to a cloud computer through a programmable PLC controller; the cloud computer analyzes according to the current storage positions of the terminal that it owns for comprehensive arrangement to find the storage positions that best match the uploaded information, and returns a command through the Internet to the PLC; and the PLC controller initiates the control function for each device of the terminal according to the command request to automatically take and put express deliveries at precise positions. Under the control of the system computer, the putting and taking of express deliveries are automatically completed during the whole process, which realizes the automation of the putting and taking of express deliveries in a real sense. Because the whole cabinet is designed with metal-enclosed built-in shelves, the problem of low storage, high failure rate and easy damage caused by ''one-door-one-box'' is fundamentally solved.

The invention discloses a login request verification method and device, a storage medium and electronic equipment, and belongs to the field of cloud services. The method comprises the following steps: receiving a login request from a secure shell protocol (SSH) client, wherein the login request is used for requesting to log in a target business service; searching a matched target pod instance in multiple pod instances according to the login request, wherein the target pod instance comprises two containers which respectively correspond to an SSH login agent and the target business service; and verifying the login request by adopting the target pod instance. According to the method and the device, the performance limitation of a single point of failure and single proxy service is avoided, each business service is an independent SSH login proxy, isolation among multiple users can be realized, better security is provided, the technical problems of high login security and failure rate caused by centralized deployment of the SSH login proxy in related technologies are solved, and the stability and the security of the SSH login proxy are improved.

The invention relates to a sealing flashboard door, in particular to a sealing flashboard door for biomass feeding, and solves the problems of poor sealing effect, unsmooth opening and closing, jamming and blockage of an existing flashboard door. The sealing flashboard door for biomass feeding comprises a valve body front end, a valve body rear end, a feed port and a discharge port, wherein the valve body front end and the valve body rear end are both positioned at the front end and the rear end inside a valve body, the feed port is fixedly installed between the front end of the valve body andthe rear end of the valve body and located on the upper portion of the valve body, and the discharge port is located on the lower portion of the valve body. The sealing flashboard door for biomass feeding also comprises a plugboard assembly and a locking assembly, the plugboard assembly is in sliding connection with the bottom of the front end of the valve body and the bottom of the rear end of the valve body, and the locking mechanism is connected with the plugboard assembly. The sealing flashboard door can effectively solve the problems of unsmooth opening and closing, jamming, blocking, high failure rate and the like after frequent opening and closing.

The invention belongs to the technical field of sewing machines and particularly relates to a direct-drive roller sewing machine. The direct-drive roller sewing machine comprises a spindle mechanism, a needle rod swing mechanism, an upper feeding mechanism and a lower feeding mechanism, wherein the spindle mechanism is driven by a spindle motor, the needle rod swing mechanism is driven by a needle rod swing motor, the upper feeding mechanism is driven by an upper feeding motor, the lower feeding mechanism is driven by a lower feeding motor, and the spindle motor, the needle rod swing motor, the upper feeding motor and the lower feeding motor are controlled by a controlled to move or are mutually coordinated to move. The direct-drive roller sewing machine has the advantages that the needle swing mechanism, the upper feeding mechanism and the lower feeding mechanism changes an original pure mechanical transmission mechanism into a motor direct-drive mechanism, the defect that the pure mechanical transmission mechanism is complex ins structure, many in parts, complex in assembling and high in fault rate is overcome, the direct-drive roller sewing machine is compact in structure, assembling work efficiency is increased, and machine work efficiency is increased.

The invention relates to a combined wind power speed increaser, belonging to a part in a wind power generating unit. At present, the wind power speed increaser with high reliability and convenient maintenance does not exist. The speed increaser comprises an air cooling device, an oil supply filter device and a temperature control device. The speed increaser is characterized by also comprising a primary speed increase unit and at least two secondary speed increase units, wherein the air cooling device and the oil supply filter device are both arranged on the primary speed increase unit; the temperature control device is arranged on the secondary speed increase unit; the primary speed increase unit comprises a principle shaft, gear shafts and a big gear ring with a double helical tooth; theprinciple shaft is arranged on the big gear ring; the number of the gear shafts is the same with that of the secondary speed increase unit; the gear shafts are engaged with the big gear ring respectively; the secondary speed increase unit comprises a transmission shaft, a transmission gear set and an output shaft; the transmission shaft and the output shaft are both arranged on the transmission gear set; and the transmission shaft is connected with the corresponding gear shaft. The combined wind power speed increaser has reasonable structure design, high reliability, easy disassembly and assembly and easy maintenance.

The invention discloses a control method applied to closed-loop speed regulation of an FFU (fan filter unit) alternating-current fan. The control method includes (1), reading stored preset working parameter values of the FFU alternating-current fan by a controller of the FFU alternating-current fan; (2), reading and processing real-time data information of working voltage, current, temperature and rotating speed of the alternating fan by the controller of the FFU alternating-current fan; (3), comparing data information of the step (1) and the step (2), if difference between actual working parameters and preset working parameters of the FFU alternating-fan is within an allowable error range, keeping SPWM (sine pulse width modulation) speed regulation control signals unchanged, and if not, correspondingly regulating cycles and phase-shifting angle parameters of the SPWM control signals to regulate output rotating speeds of the FFU alternating-current fan and wind-speed output values of an FFU. By the control method, the problems such as low control accuracy, high failure rate, low system efficiency of the FFU alternating-current fan in the prior art can be solved.

The invention belongs to a field of insulation fault diagnosis methods and specifically relates to an insulation fault diagnosis method for a cable system. The invention solves problems of long insulation fault detection time and high fault rate existing in cable system testing for a long term and provides the effective and practical method for insulation fault diagnosis of large scale cable systems. Production quality of the cable system is verified fully and the method provided by the invention has great application and promotion value. The method includes obtaining a resistance value RS through testing; testing a first pair of core points and obtaining a result about whether insulation of the first pair of core points is qualified or not; switching to the next pair of core points until insulation fault diagnosis of all the core points of the cable system is implemented and finishing the testing.

The invention discloses a high / low-pressure air circuit system for a test bed. The high / low-pressure air circuit system comprises an air inlet, a three-piece component and a high / low-pressure switching air circuit, wherein an input end of the three-piece component is connected to the air inlet; a stop valve is arranged between an output end of the three-piece component and an input end of the high / low-pressure switching air circuit; an input end of the stop valve is connected with the output end of the three-piece component; an output end of the stop valve is connected to the high / low-pressure switching air circuit; the high / low-pressure switching air circuit comprises a trunk air circuit, a high-pressure branch and a low-pressure branch; one end of each of the high-pressure branch and the low-pressure branch is connected to the trunk air circuit; the other ends of the high-pressure branch and the low-pressure branch are respectively connected to an air control port of a double-station five-way dual-air control slide valve. The high / low-pressure air circuit system has the advantages of rapid high / low-pressure switching, compact structure, few valves, low failure rate, convenience in use, high safety and the like, wherein the air circuit switching is not interfered.

The invention provides a high-reliability speed measuring type double-way speed measuring structure of a motor, and aims at solving the problems of low reliability and high fault rate of the speed measuring devices of the existing motors. The high-reliability speed measuring type double-way speed measuring structure of the motor comprises a speed measuring gear, a mounting cover, a speed sensor and a speed measuring coder; the speed measuring gear is fixed on a motor rotating shaft, and an axis of the speed measuring gear outwards extends to be equipped with a speed measuring shaft; the mounting cover is mounted on a motor end cover; the speed measuring sensor and the speed measuring coder are both mounted and fixed on the sidewall of the mounting cover; the speed measuring sensor is used for detecting the rotating number of the speed measuring gear as well as the rotating speed of the speed measuring shaft. According to the high-reliability speed measuring type double-way speed measuring structure of the motor, the double-way speed measuring is adopted, so that the working reliability of a system can be greatly improved, and the maintaining time and the maintaining cost can be greatly reduced; the unique design structure reduces the motor space, lowers down the cost and achieves the double-way speed measuring function.

The invention relates to the technical field of hydraulic belt winding devices for a belt conveyor, in particular to a novel belt clamping mechanism for the belt conveyor. The novel belt clamping mechanism is mainly and technically characterized in that hinge bases and fixed beams are arranged on a rack; belt clamping arms are arranged on the hinge bases; a rubber conveyor belt of the belt conveyor runs between each belt clamping arm and the corresponding fixed beam. Cams of the belt clamping arms change the distance between a belt clamping transverse beam and the corresponding fixed beam to clamp and release the conveying belt by swinging handles of the belt clamping arms. According to the invention, the problems that due to the fact that a belt clamping mechanism of a traditional hydraulic belt winding device clamps and releases the rubber conveyor belt through stretching out and drawing back of a hydraulic oil cylinder, a structure is complex, the response is low, the failure rate is high, and use and maintenance are cumbersome are solved. The novel belt clamping mechanism has the advantages of being simple in structure, low in manufacturing cost and easy to use and operate.