553results about How to "Avoid Stuck Situations" patented technology

The invention discloses an automatic IC testing and sorting device. The device comprises a feeding device, a testing device and a sorting and storing device which are arranged on a machine frame; andthe machine frame comprises a first mounting plate and a second mounting plate, wherein the first mounting plate is vertically arranged, and the second mounting plate is connected with the bottom of the first mounting plate and is obliquely arranged. An IC material tube is clamped on the feeding device, IC chips which are not tested in the IC material tube are supplied to the testing device for testing through the feeding device, after the testing is finished, the chips are classified through the sorting and storing device and are stored in a plurality of empty material tubes. According to thedevice, a clamping mechanism with the IC material tube clamped is turned over, so that the IC material tube is changed into a vertical state, and the IC chips in the IC material tube slide out and get to a vertical material channel; the IC chips can be controlled by a blocking and pressing mechanism to be fed to the testing device one by one, testing chucks clamp the IC chips and push the IC chips to a testing PCB for testing, the IC chips are received through a material receiving table after the test is completed and are classified and placed to a first material storing mechanism or a second material storing mechanism, so that the speed of sorting and storing is increased, and the labor cost is saved.

The invention relates to an elevator car door lock device and an elevator. The elevator car door lock device comprises a belt, a door vane base, a first oscillating bar, a second oscillating bar, a horizontal crossbar, a telescopic device and a car door lock hook. The belt is connected with the first oscillating bar, and the first oscillating bar and the second oscillating bar are connected to the door knife base in a rotating mode. One end of the horizontal crossbar is connected with the car door lock hook, and the other end of the horizontal crossbar is provided with a protruding block. The protruding block abuts against one side, far from the first oscillating bar, of the second oscillating bar. The telescopic device comprises an energized magnet, a connection rod, a limit plate, a push plate and a telescopic spring, wherein the telescopic spring is arranged on the connection rod in a sleeving mode. The second oscillating bar is provided with a through hole matched with the connection rod, one end of the connection rod is connected with the limit plate, and the other end of the connection rod penetrates through the through hole and is connected with the push plate. The two ends of the telescopic spring abut against the push plate and the face, opposite to first oscillating bar, of the second oscillating bar respectively. According to the elevator car door lock device, the stroke difference between a landing door and a car door is greatly reduced, synchronicity between the landing door and the car door is improved, the length of an upper sill of the car door is greatly reduced, and an elevator well can be designed to be narrower.

The invention relates to an indoor decoration wall tile laying device. The indoor decoration wall tile laying device includes a moving device, two side plates, a feeding device, laying device bodies and plastering devices. The side plates are front and back symmetrically installed on the middle part of the upper end of the moving device, the feeding device is installed at the upper ends of the side plates by welding, the laying device bodies are laid below the feeding device, and the laying device bodies are installed in the side plates, and the plastering devices are arranged at the left endsof the laying device bodies. According to the indoor decoration wall tile laying device, the problems that the laying process is cumbersome and the manual installation accuracy is low due to the factthat when laying is carried out manually, the rough surface of a wall tile is plastered with cement manually, and then the wall tile is positioned and laid manually; and the laying efficiency of thewall tile is reduced due to the fact that when laying is carried out by an existing indoor wall tile laying device, the wall tile is manually placed on the wall tile laying device for locking and fixing, and then the rough surface of the wall tile is plastered with cement, the plastering of the cement is uneven during laying, wall tile laying produces hollowing, and the process of manual placing of the wall tile is cumbersome can be solved.

The invention discloses a full-automatic coiling machine. The key points of its technical scheme are that it includes a frame, a winding roller and a controller arranged on the frame, and a horizontal bar parallel to the winding roller is arranged on the frame. A slider that can slide on the cross bar is arranged on the upper body, a cutter and a suction cup are arranged on the slider, a conversion device is arranged on the frame, and at least two mounting seats are arranged on the conversion device, each mounting seat is equipped with a The winding roller, through the rotation of the conversion device, can drive the winding roller to move on the frame, and the frame is provided with a support device, which is located at the winding roller for work, and the support device is used to support the winding roller away from One end of the mounting base is provided with a transmission device on the frame, the transmission device is located at the supporting device, and the transmission device is arranged in linkage with the end of the winding roller away from the mounting base. The fully automatic winding machine of the present invention can improve the tape winding efficiency and reduce the labor intensity of workers.

The invention discloses a proof-of-work calculating method and system, electronic equipment, a program and a medium. The method comprises that a proof-of-work parameter is updated according to a preset period, the updated proof-of-work parameter is published, so that a mining machine calculates the proof-of-work on the basis of the updated proof-of-work parameter; and after that a proof-of-work result reported by the mining machine is received, whether the mining machine reporting the proof-of-work result completes the proof-of-work is confirmed according to whether the proof-of-work result iscompleted on the basis of the published proof-of-work parameter. Thus, a dead locking condition, namely, the condition that there is no participant that can complete the proof-of work, can be avoided.

The invention relates to a photovoltaic charger control device which comprises a photovoltaic voltage sampling unit, an output current sampling unit, an output voltage sampling unit, an MPPT unit, a first voltage controller, a voltage stabilizing control given unit, a second voltage controller, an amplitude limiting control unit, a current controller and a PWM generator. A photovoltaic charger control method comprises the steps that an MPPT control ring, a voltage stabilizing control ring, two voltage inner rings and a current control outer ring are adopted, the MPPT control ring output minimum value and the voltage stabilizing control ring output minimum value are selected as the given Iref of the current control outer ring, the output current value Ibuck of a photovoltaic charger is used as the feedback of the current control outer ring, the current control outer ring outputs the driving duty ratio to the PWM generator, and the PWM generator generates PWM driving signals to drive a switch tube of a main circuit of the photovoltaic charger to work. According to the photovoltaic charger control device and method, it is ensured that the photovoltaic voltage is always on the right side of a polar plate P-V curve, no output current jumping occurs, and it is ensured that photovoltaic energy is used more efficiently.

The invention relates to the technical field of lifts, in particular to a lift door lock device. The lift door lock device comprises a left fastening rod, a right fastening rod, a car door lock assembly, a storey door lock assembly and a base. The base is connected with a car door. The left fastening rod, the right fastening rod and the car door lock assembly are all rotationally connected with the base. The left fastening rod and the right fastening rod are opposite. The storey door lock assembly is installed on a storey door and comprises a rolling wheel assembly. When the car door and the storey door are located on the same horizontal plane, the rolling wheel assembly is located between the left fastening rod and the right fastening rod, and the storey door lock assembly and the car door lock assembly are sequentially unlocked in the process that the right fastening rod is driven by a belt to move from the first position to the second position. According to the lift door lock device, the opening manner of a lift door is that the storey door lock and the car door lock are sequentially unlocked, and finally the car door lock and the storey door lock are opened in linkage; and in this way, the situation that the car door lock gets stuck when the car door is opened is avoided, the operation reliability of a lift is improved, and the attractiveness of the lift is improved. The invention further provides the lift.

The invention discloses a unit braking cylinder with a hand braking device. The unit braking cylinder comprises an integral diaphragm, a piston assembly, a cylinder assembly, a cylinder cover assembly, a sealing pad, a sealing ring, a supporting ring, a lubricating sleeve, a relieving spring, a hand braking lever, push iron, a dustproof sleeve, an automatic brake lining gap one-way adjusting device and a manual brake lining gap adjusting device. The push iron is fixedly connected with a piston rod. The hand braking lever is in pin joint with a hand braking seat fixedly connected to a cylinder cover. The bidirectional function of force during hand braking is achieved, the clamping stagnation phenomenon can be avoided, a double-nut conical surface clutch structure is adopted for the automatic brake lining gap one-way adjusting device, the structure is simple, the accessory universality is good, a protruding structure is adopted for a cylinder body, the cylinder body is integrally formed in a spinning mode, the airtightness of the cylinder body can be ensured, middle-arranged type installation of the unit braking cylinder can also be achieved, and the unit braking cylinder is complete in function, compact in structure and capable of meeting the requirement for fast truck loading.

The invention discloses a broken stratum TBM jamming risk early warning method based on a torque-to-push ratio, and the method comprises the following steps of S1, collecting the surrounding rock state data through exposing a shield surrounding rock geological sketch; S2, acquiring the TBM tunneling parameter data through a TBM data acquisition system; S3, establishing a corresponding relation between the torque-to-push ratio and the surrounding rock state; S4, acquiring the tunneling state data through a TBM tunneling report recorded by a main driver; S5, establishing a jamming risk evaluation standard based on the torque-to-push ratio; and S6, through the TBM real-time tunneling parameters, according to the judgment standard, judging the TBM jamming risk, and carrying out the real-time early warning. According to the present invention, the tunnel surrounding rock state, the tunneling state of the TBM and the possible jamming risk of TBM tunneling can be effectively mastered in time,so that the constructors can master the information at all aspects in time and take the TBM jamming prevention measures in time, the jamming risk of the TBM can be effectively reduced, and the construction efficiency of the TBM is improved.

The invention discloses an automatic ice maker and a refrigerator with the automatic ice maker. The automatic ice maker comprises an ice maker body, an ice making plate unit, a driving device, an ice probing pole and an ice storage box, wherein the ice making plate unit can be inserted in and pulled out from a cylindrical frame part of the ice maker body; the ice making plate unit comprises an ice making plate frame, an end cover and an ice making plate; the driving unit is installed on the ice maker body and is provided with a first driving shaft and a second driving shaft; the ice probing pole is arranged on the ice maker body; the ice making plate can be driven to rotate around the horizontal axis by the first driving shaft so as to drive the ice making plate to rotate in the ice making plate frame; the ice probing pole can be driven by the second driving shaft to rotate for a predetermined angle around the vertical axis in the horizontal plane so as to probe ice in the ice storagebox. According to the ice maker disclosed by the embodiment of the invention, as the ice probing pole can rotate in the horizontal direction for probing ice, thus the influence of ice accumulation shape can be overcame and the ice storage condition in the ice storage box can be accurately detected.

The invention relates to the technical field of pipe production and machining, in particular to an automatic pipe feeding and steel distribution device. The device comprises a supporting rod, a conveying structure, a lubricating structure, a material distribution structure, a buffering structure and a feeding structure; through the arrangement of the material distribution structure, pipes laid flat on the conveying structure can be singly extracted, so that the situation that the no pipe is distributed or multiple pipes are distributed during material distribution can be avoided, the one-by-one distribution efficiency of the pipes is improved, the effect of improving the production rhythm is achieved, and the buffering structure is further arranged on the material distribution structure, so that the pipes rolling down from the material distribution structure can be fully buffered, impact damage caused by direct rolling down of the pipes can be avoided, the pipes are protected, the pipes roll into the feeding structure, the pipes can be vertically conveyed through the feeding structure, it is guaranteed that a spraying production line is a pipe one-by-one spraying production line, and the pipes uniformly arranged on an arrangement bed are conveyed one by one, so that the spraying efficiency and quality can be greatly improved.

The invention relates to a corrugated board manufacture process. A bottom plate, side plates, a conveying device, a gluing device, a laminating device and a drying device are arranged to cooperatively complete manufacturing of a corrugated board. By means of the corrugated board manufacture process, the problem that when core paper and surface paper are pasted manually, glue needs to be smeared on the surface paper manually, and after the glue is smeared, the core paper is pasted on the surface paper, and accordingly, the manual corrugated paperboard manufacture process is tedious and low in efficiency and the problem that when existing corrugated board manufacture equipment is used for manufacturing corrugated boards, glue is generally directly smeared on the surface of the surface paper, the core paper is directly pasted on the surface of the surface paper through the existing corrugated board manufacture equipment after glue smearing is completed, and in the core paper pasting process, the existing equipment is likely to cause deformation of the distance between the core paper, and accordingly, the heights of the manufactured corrugated paperboards are different, and the manufacturing of the corrugated boards is unqualified can be solved.

The invention discloses a video transmitting and processing method and an apparatus. The method comprises the following steps: receiving at least one video frame; according to the video frame sending sequence length and in reference to the discrepancy in the sequence length as well as a precious packet loss ratio, calculating the packet loss ratio of this time; and based on the packet loss ratio this time, determining if the received video frame(s) is / are about to be abandoned or not. According to the technical schemes provided by the invention, it is possible to adjust the packet loss ratio of video frame(s) so as to accurately determine if the video frame(s) is / are abandoned or not. As a result, improper abandonment of video frame(s) caused by only one packet loss ration can be preventable; the problem of abandoning a section of continuous video frames in concentration happening in weak internet connection can also be well addressed. As a result, the abandonment of video frames becomes more reasonable, providing a smooth playing effect even in a poor internet connection condition and avoiding unclear and stuck video pictures.

The invention discloses a novel fresh air integrated machine. The novel fresh air integrated machine comprises a lower barrel body and an upper barrel body which are connected through a connecting mechanism, wherein an outdoor air inlet is formed in the lower barrel body; an indoor air inlet and a fresh air outlet are formed in the upper barrel body; a heating device is an electric heating pipe; asecond valve motor is arranged at one side of the heating device; an air blower is mounted in the upper barrel body, and the bottom part of the air blower comprises an air blower mounting groove anda filtering net; a barrel cover is arranged on the upper barrel body and is positioned at the bottom part of the air blower; an air detecting mechanism is arranged in the barrel cover; a movable doormechanism is mounted at one side of the upper barrel body. According to the novel fresh air integrated machine, the inlet can be intelligently controlled to open and close based on the concentration of carbon dioxide or particles, and independent outdoor air feeding or indoor air feeding can be achieved, or hybrid air feeding can also be achieved; the air outlet volume is conveniently adjusted; the upper barrel body comprises three housings and four outer supports. The novel fresh air integrated machine is simple in structure, convenient to assemble and disassemble, and convenient to maintain.

The invention relates to an elevator car door lock device and an elevator. The elevator car door lock device comprises a belt, a door vane base, a first oscillating bar, a second oscillating bar, a horizontal crossbar, a telescopic device and a car door lock hook. The belt is connected with the first oscillating bar, and the first oscillating bar and the second oscillating bar are connected to the door knife base in a rotating mode. One end of the horizontal crossbar is connected with the car door lock hook, and the other end of the horizontal crossbar is provided with a protruding block. The protruding block abuts against one side, far from the first oscillating bar, of the second oscillating bar. The telescopic device comprises an energized magnet, a connection rod, a limit plate, a push plate and a telescopic spring, wherein the telescopic spring is arranged on the connection rod in a sleeving mode. The second oscillating bar is provided with a through hole matched with the connection rod, one end of the connection rod is connected with the limit plate, and the other end of the connection rod penetrates through the through hole and is connected with the push plate. The two ends of the telescopic spring abut against the push plate and the face, opposite to first oscillating bar, of the second oscillating bar respectively. According to the elevator car door lock device, the stroke difference between a landing door and a car door is greatly reduced, synchronicity between the landing door and the car door is improved, the length of an upper sill of the car door is greatly reduced, and an elevator well can be designed to be narrower.

The invention discloses a method for planting cherry trees with high disease resistance. According to the method, a probiotic stock solution is fermented, so that the activity of probiotics is greatlyimproved, rich nutrients are provided for cherry trees, the cherry trees are full of spirit, and the resistance of the cherry trees is improved; meanwhile, pathogenic bacteria breeding in soil can beeffectively inhibited, trunk nodulation and insects are prevented and controlled, and the disease resistance of trunks can be effectively improved; by reasonably configuring the components and proportions of the cherry tree planting soil, the disease resistance of the cherry trees is effectively improved; planting equipment can plant the cherry trees while digging pits, so that the planting efficiency is greatly improved, and it is guaranteed that saplings can be planted in the centers of the pit digging positions during planting; and meanwhile, through the design of two adjustable conveyingbelts, the circumstance that the saplings are jammed in a descending process in conveying pipes is effectively avoided in a planting process.

The invention relates to mobile phone rear cover glass visual inspection equipment which is provided with a working platform, a feeding station, a carrying station, a detection station and a material distribution station are arranged on the working platform, a feeding assembly is arranged on the feeding station, a carrying assembly is arranged on the carrying station, a detection assembly is arranged on the detection station, and a material distribution assembly is arranged on the material distribution station. A rotary table is arranged on the working platform, the detection assembly comprises a side shooting assembly and an end face shooting assembly, the side shooting assembly comprises a shooting camera and an irradiation light source, the end face shooting assembly comprises a surface scanning camera and a surface scanning light source, and each shooting camera detects each side of the mobile phone rear cover glass through cooperation with the corresponding irradiation light source. The surface scanning camera is matched with the surface scanning light source to detect the large surface of the mobile phone rear cover glass, and the detected mobile phone rear cover glass is classified through the material distribution assembly. The equipment can efficiently and automatically achieve feeding, detecting and screening of mobile phone rear cover glass, and is efficient and practical.

The embodiment of the invention discloses an information processing method and device for a block chain network, and node equipment, and the method comprises the steps: if target consensus verification information for the consensus verification of a second block is received in a process that the target consensus node carries out the consensus verification of a first block, determining whether thetarget consensus verification information satisfies a cache condition according to the block attribute information of the second block; if the target consensus verification information meets the caching condition, storing the target consensus verification information into an information caching pool corresponding to the target consensus node; and after the consensus verification of the first blockis completed, performing consensus verification on the second block based on the target consensus verification information in the information cache pool. By adopting the embodiment of the invention,the reliability of the blockchain network can be improved.

The invention discloses a smart protection and control system and method for a universal joint and a gearbox of a rotary cultivator. The system includes an angle sensor, a controller, a limit switch, an arrangement button, a lifting handle, a solenoid valve and a lifting arm oil cylinder, wherein the angle sensor is mounted on a rotation central shaft of a lifting arm of a rotary cutter of the rotary cultivator. The controller is mounted on the machine body of the rotary cultivator. The limit switch is mounted at a gear handle position of the rotary cutter of the rotary cultivator or at a clutch position of the rotary cutter. The arrangement button is mounted on an operation board of the rotary cultivator. The angle sensor, the limit switch, the arrangement button and the solenoid valve are connected with the controller. The the lifting handle is connected with the solenoid valve. The the lifting arm oil cylinder is connected to the lifting arm of the rotary cutter of the rotary cultivator via a connecting lever. The invention also provides a smart protection and control method for the universal joint and the gearbox of the rotary cultivator. According the invention, the system and the method guarantee that during tillage of the rotary cultivator, the value of the included angle of two shafts connected to the universal joint does not exceed the allowable maximum value, so that the universal joint and the gearbox are protected.

The invention discloses an automatic cleaning device used for an instrument panel of an automobile. The automatic cleaning device comprises a cleaning box, a micro motor is fixedly connected to one side of the bottom of the inner wall of the cleaning box through a connecting block, and a first belt pulley is arranged on the outer surface of an output shaft of the micro motor in a sleeving mode; a transmission box is fixedly connected to one side of the top of the cleaning box, supporting frames are fixedly connected to the two sides of the bottom of the inner wall of the transmission box, and a crankshaft is rotatably connected between the two supporting frames through a bearing; and one end of the crankshaft penetrates through the supporting frames and extends to one sides of the supporting frames. The invention relates to the technical field of automobile instrument equipment. According to the automatic cleaning device used for the instrument panel of the automobile, the cleaning effect is enhanced greatly, the fact that the instrument panel can be cleaned automatically only through controlling of a switch by operating of a driver is realized, occurrence of traffic accidents caused by manual wiping the instrument panel by people is well avoided, and rapid and efficient cleaning for the instrument panel is realized.

The invention relates to the technical field of vehicle-mounted military radars, in particular to a vehicle-mounted external illuminating radar antenna framework folding and unfolding mechanism. The adapted size range of the antenna aperture is relatively wide and antenna bearing rods are not limited in length and number; a traction mechanism realizes motion transmission among the antenna bearing rods, so that a driving mechanism only needs to be arranged on one bearing rod and the space is saved while the driving mechanism is simplified; a locking mechanism is simple to operate, and the bearing rods can be locked by one-step operation, so that large amounts of time and manpower costs are saved; in the locking mechanism, a taper pin is in conical fit with a taper pin seat, so that compared with a cylindrical surface, the situation of jamming caused by coaxiality can be avoided; a supporting arm is mounted on a main supporting frame; a driving apparatus is arranged on the edge of the supporting arm and connected with the antenna bearing rods; the traction mechanism is connected with the antenna bearing rods; and a guide apparatus and the locking mechanism are located between the supporting arm and the antenna bearing rods.

The invention discloses a morning check device. A fingerprint recognition module is added, and fingerprint information of parents related to children is input in advance and stored in a fingerprint data base, so that identities of the parents can be recognized easily when the children are sent to and picked up from school, and troublesomeness and potential safety hazards in manual confirmation of identity information of the parents who send and pick up the children; a face recognition module is added, and face information of the children or the parents of the children is input in advance and stored in a face information database, so that compared with a card reading module and the fingerprint recognition module, the face recognition module can reduce workload and unsafety in children sending and pickup work, and diversification, optionality and simplification of identity recognition are realized; a design mode that an antenna unit and a mainboard circuit are separated is adopted, so that electromagnetic interference to an antenna due to the mainboard circuit is reduced, and card reading distance is increased; a design mode that a button is parallelly connected with a capacitor is adopted, so that electric level decreasing speed can be slowed down, and pause of a main control chip of the morning check device is avoided; the morning check device has an anti-shake function, so that more sensitivity in button reading action is realized.

The invention discloses a millstone type natural graphite fine grinding and screening device. The millstone type natural graphite fine grinding and screening device comprises a base, a grinding box, agrinding box screen net, a second drive motor and a material collecting box. A grinding cavity is internally provided with a fixed millstone. A main shaft is fixedly provided with a movable grindinghead, and the movable grinding head is located below the fixed millstone. The left inner wall and the right inner wall of the grinding box are obliquely provided with a first clamping groove and a second clamping groove correspondingly. The screen net is installed between the first clamping groove and the second clamping groove in a sliding manner. The movable grinding head rotates to grind graphite particles, compared with an existing grinding manner, the grinding effect of the movable grinding head is better, and the fine degrees of ground particles are higher; and by means of horizontal movement of a horizontally moving block, the screen net is indirectly driven to slide between the first clamping groove and the second clamping groove, the screening speed of the ground graphite particles is greatly increased, meanwhile, the screen net is obliquely arranged, the flowing rate of the graphite particles on the screen net is further increased, the situation that holes are blocked by thegraphite particles is effectively avoided, and the screen net cleaning frequency is reduced.

The invention belongs to the technical field of vending machines, particularly relates to an automatic bag discharging device of a vending machine, and provides the following scheme aiming at the problems that goods cannot be received by a bag discharging device in the patent, the goods damaged when falling down in the bag discharging process, and meanwhile, the goods cannot be supplemented in time after being sold. The automatic bag discharging device comprises a vending machine body, servo motors are fixed to the inner walls of the two sides of the vending machine body through screws, the output shafts of the servo motors are connected with lead screws through couplers, the outer walls of the lead screws are sleeved with sliding plates, and lifting plates are arranged on the outer wallsof the sliding plates. According to the present invention, a buffer spring and a foam pad can achieve a good buffer effect, goods can be prevented from being broken, the sales quality of the goods isimproved; a piston rod of an electric telescopic rod is controlled to extend, and a push plate can push the goods into a goods discharging barrel from a goods discharging barrel, so that the automaticgoods supplementation is achieved, operation is convenient, maintenance is convenient, and the use requirements of people are met.

The invention relates to a device for laying decorative wall tiles for indoor decoration, which includes a moving device, two side plates, a feeding device, a laying device and a plastering device. The welding method is equipped with a feeding device, a laying device is installed under the feeding device, the laying device is installed inside the side plate, and a plastering device is installed at the left end of the laying device. The present invention provides a device for laying decorative wall tiles for interior decoration, which can solve the problem of manual laying, first manually smearing cement on the rough surface of the wall tiles, and then manually positioning and laying the wall tiles. When laying an indoor wall tile laying device, first manually place the wall tiles on the wall tile laying device to lock and fix them, and then apply cement to the rough surface of the wall tiles. Due to the uneven application of cement during laying, the wall tiles are laid unevenly. Hollow, and the process of manually placing wall tiles is cumbersome, thereby reducing the efficiency of wall tile laying and other issues.

The invention relates to a full-automatic metal plate punching and shearing production line and a using method thereof. The full-automatic metal plate punching and shearing production line comprises adischarging frame, a leveling machine, a punching machine and a material trolley; the discharging frame is arranged on one side of the leveling machine, the punching machine is arranged on the otherside of the leveling machine, and corresponding guardrails are arranged on the two sides between the punching machine and the leveling machine; the material trolley is arranged outside the dischargingend of the punching machine; the punching machine comprises a machine body, a rack, a gantry material pulling device, a workbench, a striking device and a plate shearing device, wherein the rack is arranged on the upper portion and the two sides of the machine body; the workbench is arranged on the side, close to the guardrails, of the upper portion of the gantry material pulling device; and thestriking device is correspondingly arranged on the upper portion of the workbench, the striking device is fixed to the rack at the upper portion of the machine body, and a plate shearing device is arranged on the inner side of the outer end part of the rack and close to the material trolley. According to the full-automatic metal plate punching and shearing production line and the using method thereof, automatic machining is achieved, the production efficiency is effectively improved, the cost is reduced, manpower is reduced, the consistency of machined metal plates is good, and the yield is effectively increased.

The invention discloses a raw material crushing and screening device for new material preparation. The device comprises a base, a processing box, fodder choppers, a first drive motor, a screening device and an electromagnet, wherein the inner walls of the two sides of the interior of the processing box are separately and fixedly provided with a sliding rail by means of screws; the fodder choppersare installed on the sliding rails in a sliding way; a sliding rod B is installed at the right side of the processing box in a sliding way; a limiting block B is fixedly installed at the right end ofthe sliding rod B; a center shaft of a sliding rod A and a center shaft of the sliding rod B are positioned on the same horizontal line; the screening device is fixedly installed between the sliding rod A and the sliding rod B. A raw material on a screen plate is crushed by indirectly driving the fodder choppers to move up and down, so that the crushing effect is greatly improved. Furthermore, rawmaterials with different particle sizes are screened under the premise of not replacing the screen plate, so that the versatility of the screen plate is improved; the screen plate does not need to bereplaced, so that the working efficiency is increased.

A desilting, blowing and sand sucking device for construction of a bridge foundation steel cofferdam comprises a cover body, a sand flushing device and a sand sucking device, wherein the sand flushing device and the sand sucking device are arranged inside the cover body; the sand flushing device gathers mud gravel; the sand sucking device sucks and discharges the mid gravel out of the cover. The desilting, blowing and sand sucking device for construction of the bridge foundation steel cofferdam has the advantages of being high in efficiency, good in applicability, simple in structure, good in operability, economical efficiency and application prospect, and the like.