185results about How to "Shorten speed" patented technology

The utility model discloses a kind of steel wire rope automatic rope winding machines, by setting torsion releasing device, release the torsion generated in the process of winding rope of steel wire rope, prevent the disorder of rope reel caused by torsion of steel wire rope, tension adjusting device, the tension of steel wire rope in the process of winding operation can be adjusted in real time, so that winding is more regular, by increasing the friction of steel wire rope to slow down its speed, reach the purpose of adjusting tension;And rope reel butt joint device realizes automatic lifting transfer of the winding reel and the storage of steel wire rope by lifting mechanism and transmission mechanism, the degree of automation of the in-place, butt joint and rotating action of steel wire rope reel is high, winding is more efficient;While the rope guiding roller, line pressing mechanism and line arranging mechanism arranged between rope reel butt joint device and tension adjusting device, so that the line arranging and winding action cooperation is more smooth, and line arranging mechanism uses positive and negative screw rod to carry out automatic reversing, can realize the orderly storage of steel wire rope, improve the operation efficiency of steel wire rope storage.

The utility model relates to an anti-ice-falling device for the surface of a cross tie beam of a bridge tower, which comprises a plurality of anti-ice-falling devices arranged on the surface of the cross tie beam, each anti-ice-falling device comprises an anti-ice-falling clamp, a plurality of raised fixing pieces and a plurality of extended connecting pieces, and the anti-ice-falling clamps comprise a first anti-ice-falling clamp and a second anti-ice-falling clamp. The first anti-ice-falling clamp and the second anti-ice-falling clamp are fixedly arranged on the edges of the left side and the right side of the cross tie beam respectively, and the first anti-ice-falling clamp and the second anti-ice-falling clamp are connected into a whole through the extending connecting pieces and the protruding fixing pieces and fixed to the upper surface of the cross tie beam. The limiting baffles arranged at certain intervals prevent solid accumulated ice from sliding on the upper surface of the bridge tower cross tie beam, meanwhile, lateral drainage of the upper surface of the cross tie beam cannot be hindered, the phenomenon that a traditional drainage channel becomes a'water blocking channel 'due to icing is avoided, and the size of a single block of ice accumulated on the upper surface of the cross tie beam is limited within a safety threshold value as much as possible.

One aspect of the present application relates to a driver assistance system for automatic longitudinal guidance of a motor vehicle, wherein the driver assistance system is configured to recognize at least one possible turn of the motor vehicle and to reduce the speed of the motor vehicle in dependence on the at least one recognized turn.

The invention relates to the technical field of reactors, in particular to a kneading-pressing type mixing reactor based on hydraulic drive and a working method, and the kneading-pressing type mixing reactor comprises a mixing cavity section module, a power source module and a microcontroller. Wherein the mixing cavity section module is provided with a flexible inner container used for containing materials, a plurality of independent flexible driving cavities are arranged outside the mixing cavity section module, and the mixing cavity section module comprises at least one annular cavity section and a base cavity section; the power source module conveys or recycles a working medium to each driving cavity through a pipeline system with an independent control valve and drives the driving cavities to expand or contract, so that local extrusion force is applied to the wall surface of the flexible liner from the outer side; the microcontroller controls all the valves to act according to a preset strategy and drives all the cavity sections to act cooperatively, so that the flexible inner container generates non-rotating modeling deformation kneading and pressing actions, three-dimensional mild mixing of materials is achieved, the safety risk of rotating components is fundamentally eliminated, and the problems that high-viscosity materials are poor in mixing uniformity and mixing heat release is difficult to remove rapidly are solved.

This utility model relates to the field of pipeline technology, specifically to a compressor venting and noise reduction pipeline and its noise reduction system. The compressor venting and noise reduction pipeline includes: an exhaust pipeline, a bend downstream of the exhaust pipeline, a branch pipeline downstream of the bend, an output pipeline downstream of the branch pipeline, and a silencer downstream of the output pipeline. The silencer includes a spiral flow guiding device. This utility model reduces the velocity of the medium flow by using the bend, branch pipeline, and silencer, consuming part of the kinetic energy of the medium flow, thereby reducing the noise generated by the medium colliding with the pipe wall during discharge and reducing the safety risks to on-site personnel.

The utility model belongs to the field of medical apparatus and instruments, disclose nutrient agent heat preservation temporary storage box, including heat preservation box, the heat preservation box is filled with heat preservation liquid in, fixed frame is fixedly connected in the heat preservation box, the middle of fixed frame is open -worked structure, be provided with a plurality of sleeve holes on the fixed frame, the fixed frame and the inner wall of heat preservation box are together and enclose into a closed cavity, and heat preservation liquid is filled in the closed cavity, heating pipe, heating pipe is located in the closed cavity, and is fixedly connected with the inner wall of heat preservation box, heat preservation sleeve pipe, heat preservation sleeve pipe is inserted in the sleeve hole, the inner wall and the outer wall of heat preservation sleeve pipe are set up and have sealed cavity, the sealed cavity is filled with heat preservation liquid, nutrient agent bottle, nutrient agent bottle is inserted in heat preservation sleeve pipe. Can the good heat preservation effect to the nutrient agent in nutrient agent bottle.

This utility model relates to a casting system for a molding line, including a main gating cavity, a horizontal gating cavity, a vertical gating cavity, a connecting gating cavity, a riser cavity, and a filter. The vertical gating cavity has a pouring cup cavity at its upper part. One end of the connecting gating cavity is connected to the lower part of the vertical gating cavity, and the other end is connected to one end of the main gating cavity. One end of the horizontal gating cavity is connected to the other end of the main gating cavity and is vertically arranged. The other end of the horizontal gating cavity is connected to one side of the riser cavity, and the other side of the riser cavity is connected to the casting product. The connecting gating cavity has a chamber for accommodating the filter. The two side walls of the chamber along the extension direction of the main gating cavity extend upwards at an angle away from the vertical gating cavity from their respective bottoms to their tops. In the system provided by this utility model, the force of the molten iron flow causes the filter to adhere tightly to the bottom and side walls of the chamber, ensuring the purity of the molten iron. Simultaneously, the turbulent molten iron becomes laminar flow after passing through the filter, and its velocity is reduced, minimizing slag porosity defects.

The utility model provides a sewage membrane filter device with automatic backwash function relates to sewage treatment equipment technical field, and this device includes filter jar body, the membrane filter subassembly of being immersed in jar body, and water inlet pipeline, water outlet pipeline and sludge discharge pipeline. Its core improvement is integrated with a set of intelligent automatic backwash system, and this system is constituted by backwash water supply pipeline, gas water collaborative flushing unit, parameter detection unit and intelligent control unit. The gas water collaborative flushing unit includes the micropore aerator of being established in the membrane subassembly below jar body bottom, is used for generating tiny air bubble to carry out physical scrubbing to membrane surface, backwash water supply pipeline is connected water outlet pipe, can pump into membrane subassembly water production side with water production reversely. Control unit is based on sensor signal such as transmembrane pressure difference, and the automatic switching and collaborative operation of intelligent control gas washing, water backwash and sludge discharge process, thereby realize efficient, energy -conserving, full -automatic membrane pollution cleaning, significantly prolong the life of membrane and reduce operation maintenance cost.

This invention relates to the field of felt fabric technology, and more particularly to a felt fabric winding device with anti-static function. The felt fabric winding device includes a processing box. One side of the processing box is rotatably connected to two symmetrically distributed electrostatic rollers, which are used to eliminate static electricity carried by the felt fabric. The other side of the processing box is equipped with a winding device for winding the felt fabric. One end of each electrostatic roller is fixedly connected to a meshing first gear. A servo motor, fixed to one of the electrostatic rollers on one side via a coupling, is mounted on the side wall of the processing box via a bracket. This invention achieves rightward conveying of the felt fabric by having the upper and lower electrostatic rollers rotate in opposite directions. Simultaneously, the electrostatic rollers eliminate static electricity carried by the felt fabric, preventing the accumulation of dust due to static electricity, which can lead to a large amount of dust adhering to the felt fabric and being inhaled during subsequent use, thus harming health.

The utility model discloses a kind of viscous damping wall devices for bridge, belong to damping equipment technical field, comprising: movable member is movably inserted in damping wall, damping cavity is provided in the damping wall, damping liquid is provided in the damping cavity, the movable member sliding connection with damping cavity can be with damping liquid and shear motion occurs, the movable member includes the fixed connection of fixed part with bridge superstructure, the fixed part bottom end sliding connection has the plugboard connecting piece that can be along bridge transverse sliding, plugboard connecting piece is fixedly connected with plugboard, the plugboard sliding connection is in damping cavity.The utility model is converted into heat energy dissipation by the internal friction effect between fluid molecules, and the mechanical vibration energy of structure is continuously converted into heat energy dissipation, to effectively reduce the dynamic response of structure.

This invention relates to the field of valve technology, specifically disclosing an intelligent gas flow regulating valve that integrates leaked gas collection and monitoring. The valve body includes a valve shell and a valve core. A valve stem is located at the upper end of the valve core, and a support cylinder is located at the top of the valve shell. The valve stem has a cavity inside, and a magnetic rack is movably mounted on the side wall of the valve stem. A motor is located on the outer wall of the support cylinder, and the output end of the motor is connected to a gear meshing with the magnetic rack. A magnetic plate with the same polarity as the magnetic rack is movably mounted inside the cavity. The cavity also has a telescopic chamber, and a pressure sensor is located on the side wall of the telescopic chamber. Increasing the volume of the telescopic chamber controls the magnetic plate to move away from the magnetic rack, causing the magnetic rack to disengage from the drive gear. Consequently, the valve core falls, blocking the gas path between the inlet and outlet. This invention can not only monitor gas leaks in pipelines but also collect leaked gas and use it to block the gas supply to the household gas pipeline, preventing leaked gas from escaping into the surrounding environment and causing fire safety accidents.

This utility model discloses a nanoimprinting machine, including an imprinting template mounting stage and a substrate mounting base. Multiple sets of suction cups (secondary) for adsorbing and fixing the substrate are mounted on the upper center of the substrate mounting base. The imprinting template mounting stage is positioned above the substrate mounting base. Above the positions where the suction cups (secondary) are positioned to fix the substrate, multiple sets of suction cups (tertiary) for adsorbing and fixing the imprinting template are provided, with the adsorption ends of the suction cups (tertiary) forming the adsorption end face of the imprinting template. Each set of suction cups (tertiary) is connected to a suction cup mounting plate. The suction cup mounting plate is also connected to multiple sets of laser sensors for detecting the tilt of the adsorption end face of the imprinting template relative to the substrate surface. A suction cup fixing component is located at the upper end of the suction cup mounting plate, and multiple voice coil motors are located at the upper end of the suction cup fixing component for adjusting the tilt of the adsorption end face of the imprinting template. This utility model solves the leveling problem during the imprinting process, avoids damage to the template, substrate, and imprinting head, improves the performance of the nanoimprinting machine, and achieves better nanoimprinting results.

The invention relates to the technical field of semiconductors, and discloses a method for stripping a substrate wafer, which comprises the following steps of: forming a first metal layer on the surface of a gallium nitride layer opposite to the substrate wafer, and forming a second metal layer on the surface of a support wafer; correspondingly contacting and bonding the first metal layer and the second metal layer together to form a bonded wafer; performing a first heating process; a laser scanning process is carried out on the surface of one side of the substrate wafer of the bonded wafer along a laser scanning path from the edge to the center by adopting a laser, so that the substrate wafer is separated from the gallium nitride layer; the temperature of the bonded wafer is gradually reduced from the edge to the center in the process; a laser scanning path on the surface of the substrate wafer is a spiral line from the edge to the center; and along a laser scanning path, from the edge to the center, the laser energy density, the laser scanning linear speed and the decomposition rate of the gallium nitride layer are gradually reduced, and the distances between adjacent light spots are the same. According to the invention, the yield of the gallium nitride layer after the laser lift-off process can be improved, and the fracture risk of the substrate wafer is reduced.

This invention provides an anti-condensation control method, device, and air conditioner, comprising: when a first duration is greater than a first preset duration, entering anti-condensation logic to obtain the indoor temperature; when the difference between the indoor temperature and the preset temperature is less than or equal to the preset difference, entering coil control logic to retrieve the historical coil temperature; adjusting the compressor output frequency according to a frequency compensation value to slow down the rate of coil temperature decrease; the first duration is the duration during which the first indoor humidity is greater than the first preset humidity; the frequency compensation value is determined based on the historical coil temperature change. This invention uses indoor humidity as the criterion, calculates the frequency compensation value based on the coil temperature change, and adjusts the air conditioner compressor frequency according to the frequency compensation value, thereby reducing the rate of temperature decrease of the air conditioner coil and slowing down the temperature decrease at the air conditioner guide plate, thus reducing the formation of condensation at the air conditioner guide plate and improving the user experience.

The present application relates to the field of heart rate monitoring, and particularly relates to a method and device for monitoring heart rate during exercise based on a smart watch. The method comprises the following steps: obtaining geographical position information of a user based on a smart watch, identifying a user exercise scene, and generating an exercise scene type; collecting original heart rate detection parameters, performing time series heart rate feature analysis, and constructing a heart rate feature set; performing deep exercise mode recognition on the exercise scene type and the heart rate feature set, and obtaining a user exercise mode; performing global heart rate situation awareness on the heart rate feature set, and constructing a global heart rate situation map; and performing comprehensive risk assessment and self-adaptive early warning decision-making on the global heart rate situation map according to the user exercise mode. The present application realizes self-adaptive analysis of a user heart rate state, and improves user exercise safety assessment efficiency and accuracy.

The utility model discloses an atomizer, an atomization assembly and an electronic atomization device.The atomization assembly comprises a liquid storage device and an atomization body, the liquid storage device comprises a first shell, and a first storage cavity is formed in the first shell; the atomization main body comprises an atomization core, a liquid storage body made of a porous material, a liquid guide body made of a porous material and a second shell connected with the first shell, an atomization channel and a second storage cavity are formed in the second shell, a liquid guide channel is formed between the second storage cavity and the first storage cavity, and the atomization core is installed in the atomization channel; the liquid storage body is installed in the second storage cavity, the liquid storage body is used for adsorbing atomized liquid in the second storage cavity and transmitting the atomized liquid to the atomization core, the liquid guide body makes contact with the liquid storage body, at least part of the liquid guide body is located in the liquid guide channel, and a gap exists between the liquid guide body and the inner wall of the liquid guide channel to form an air return channel; the air return channel communicates with the first storage cavity and the second storage cavity. The atomization assembly has the advantage of being low in liquid leakage risk.

The application discloses an energy-saving LED display screen with a reverse common cathode and a driving method thereof, and belongs to the technical field of LED display. The application aims at the problem that the single voltage power supply of the traditional common anode LED display screen leads to high power consumption and serious heat generation of the first display content LED, and adopts a reverse common cathode structure of dynamic anode voltage switching + cathode time-sharing gating: the ICND2018 row driving IC provides switchable double voltages for the common anode of the LED, outputs 2.6~2.8V low voltage when the first display content is displayed, and outputs 3.6~3.8V standard voltage when the second display content and the third display content are displayed; three pieces of ICND1065L16 channel constant current sink column driving IC are matched to independently control the three-color cathodes of the first display content, the second display content and the third display content, and precise power supply of color separation is realized. Under the premise of being fully compatible with the existing SMDTOP three-in-one common anode lamp beads, the first display content LED loop voltage difference is reduced from 1.8V to 0.8V, and the power consumption of the single first display content lamp is reduced by about 55%.

The utility model discloses a kind of storage basket and cabinet with self-stopping limiting mechanism, storage basket includes: basket, supporting mechanism and self-stopping limiting mechanism;Self-stopping limiting mechanism includes: installation shell, limiting ring and arc block, installation shell has installation cavity, arc block and limiting ring arc block are installed in installation shell, and the arc surface of arc block is in abutment with limiting ring, limiting ring is driven and moves by arc block;Self-stopping limiting mechanism is installed at the bottom of basket, supporting mechanism is provided with T-shaped block matched with self-stopping limiting mechanism, and the side recess of T-shaped block forms limiting clamping groove;Limiting ring is driven by basket and adapted to be in abutment with T-shaped block.The utility model is driven by setting self-stopping limiting mechanism, self-stopping limiting mechanism cooperates with T-shaped block, after rotating to specified position, it can reduce speed even stationary at specified angle, reduce the risk that storage basket is installed in corner position, cabinet door and basket collision after user closes cabinet door.

This utility model discloses a vibrating screen for nicotinamide production, comprising a support frame, four fixed seats (first type) fixed to the support frame, springs fixed to the fixed seats (first type), and fixed seats (second type) fixed to the springs. A vibrating screen body is fixed between the four fixed seats (second type). A dual-shaft motor is fixed to the lower side of the vibrating screen body. Eccentric wheels are fixed to the output shafts of the dual-shaft motors. Fixed columns are fixed to the output shafts of the dual-shaft motors. Connecting shells are fixed to the fixed columns. Sealing covers are fixed to the connecting shells. Connecting pipes are embedded within the fixed columns and communicate with the connecting shells. Through its control structure, this utility model allows the device to dynamically adjust the amplitude of the vibrating screen body according to screening requirements. When a water pump is started to inject water into the connecting shells, the centrifugal force of the connecting shells increases, causing the dual-shaft motors to drive the vibrating screen to produce a larger amplitude, suitable for processing materials that are difficult to screen. Conversely, pumping water reduces the amplitude, suitable for fine screening.

The utility model relates to an anti-falling mechanism and a fastener tightening device. The anti-falling mechanism comprises a base and a connecting rod which is arranged on the base in a penetrating mode, and one end of the connecting rod is used for being connected with a driving piece. The first sleeve sleeves the other end of the connecting rod; a first mounting groove communicated with an inner cavity of the first sleeve is formed in the side, facing the base, of the first sleeve, and an opening of the first mounting groove faces the base; the second sleeve is slidably arranged in an inner cavity of the first sleeve; the side, facing the base, of the second sleeve is connected to the other end of the connecting rod, and a containing groove is formed in the side, back to the base, of the second sleeve; and the elastic piece is arranged on the connecting rod in a sleeving mode, the elastic piece is provided with a first end and a second end which are opposite, the first end is contained in the first installation groove, and the second end abuts against the side, facing the first sleeve, of the base. According to the anti-falling mechanism provided by the invention, the speed during exiting is controlled, and the risk that the fastener falls off due to rapid exiting is avoided; and meanwhile, the structure is simple, and the manufacturing cost is low.

The anti-falling device is provided with an anti-falling assembly capable of winding a safety rope and preventing falling, a guide piece is arranged on the outer edge of the anti-falling assembly, a guide hole is formed in the outer edge wall of the guide piece, and a retarding column which deviates from the guide hole and abuts against the safety rope is arranged in the guide piece. The retarding column and the guide hole cooperate to form a deceleration area in the guide piece, and the deceleration area can increase the friction force between the retarding column and the safety rope so as to reduce the passing speed of the safety rope. The problem that in the prior art, due to the fact that the rope winding speed of an anti-falling device is too high, using of operators is affected is solved.

The invention provides a continuous feeding device and method for square bars. The device comprises two roller driving units which are symmetrically arranged on the two sides of a square bar feeding path. Each roller driving unit comprises a box body, a worm rotatably arranged in the box body, at least two worm gears meshed with the worm, rollers coaxially and fixedly connected with the worm gears, and a driving mechanism; the rollers are configured in a manner that the working surfaces of the rollers can accommodate and press the side surfaces of the square bar, and a feeding cavity for clamping the square bar is formed between the corresponding rollers of the two roller driving units; the driving mechanism is connected to the worm and used for driving the worm to rotate. According to the square bar feeding device, a structure that a plurality of worm wheels on the same side are driven by a single worm at the same time is adopted for feeding square bars, stable conveying of the square bars can be achieved, and the problems that the square bars are prone to deflection or torsion in the feeding process, and the feeding precision and stability are difficult to guarantee are solved.

The utility model provides a negative pressure conveying anti-blocking device, which relates to the technical field of material conveying, and specifically comprises a fixing groove arranged on the inner side wall of a pipeline piece, a through groove arranged on the side wall of the pipeline piece, an air inlet end, a feeding end and a discharging end arranged on the pipeline piece, a first sieve plate provided with an interlayer, a plurality of first sieve holes uniformly arranged on the first sieve plate, and a second sieve plate provided with a plurality of second sieve holes uniformly arranged on the interlayer, one end of the first sieve plate penetrates through the through groove to be arranged in the fixing groove, a cover plate is arranged at the other end of the first sieve plate, a first through hole is formed in the cover plate, the cover plate covers the through groove, the cover plate is fixed to the pipeline piece, a plurality of second sieve holes and a plurality of third sieve holes are alternately and evenly formed in the second sieve plate, and the second sieve plate is slidably arranged in the interlayer; a moving rod is arranged at the end, close to the cover plate, of the second screening plate and penetrates through the first through hole to be arranged on the cover plate. The problems that when gas in a pipeline flows in the pipeline, material accumulation is caused by airflow short circuit or the local airflow speed is too high, and then the material conveying efficiency is reduced are solved.

The straw carbonization, granulation and fertilizer preparation integrated equipment comprises a carbonization machine body and a smashing cylinder, the smashing cylinder is arranged above the carbonization machine body, the top of the smashing cylinder is communicated with a drying box, a feeding port is formed in the top end of the drying box, two heating rollers are rotationally connected into the drying box, and the two heating rollers are arranged in the drying box. Two hollow rotating cylinders are rotationally connected into the drying box, air outlet holes are formed in the peripheries of the hollow rotating cylinders, the two ends of each hollow rotating cylinder penetrate through and extend out of the crushing cylinder, one end of each hollow rotating cylinder is connected with a rotating connector, a fixed supporting plate is installed on one side of the drying box, and an air heater is installed on the fixed supporting plate; the air outlet end of the air heater is communicated with a [-shaped air conveying pipe, the two ends of the [-shaped air conveying pipe are communicated with air supply pipes, and one end of each air supply pipe is connected with a rotary connector. The straw drying device has the beneficial effects that the descending speed of straw is low, the straw can be fully heated and dried, the straw drying effect is improved, the carbonization effect is improved, and the fertilizer making effect is improved.

The invention relates to the technical field of medical instruments, in particular to a shoulder arthroscopy lateral position abduction traction frame which comprises a main frame, a traction rod and a traction rope, a sliding rail is vertically and fixedly installed on the main frame, a lifting block is vertically and slidably installed on the sliding rail, one end of the traction rope is fixedly connected with the lifting block through a traction assembly, and the other end of the traction assembly is fixedly connected with the traction rod. A water tank is fixedly installed on the main frame, a water outlet pipe is installed at the bottom end of the water tank, a water inlet pipe is installed at the upper end of the weight box, the water outlet pipe and the water inlet pipe are communicated through a connecting water pipe, and a water level window is formed in the side face of the weight box. And water level scales are arranged on the water level window. A medical worker can control the traction force on the arm by controlling the water level in the weight box, the situation that the traction force is too large or too small, and consequently the operation progress is affected is prevented, it is guaranteed that the operation effect is better, and the disease of a patient is thoroughly solved.

The application relates to the technical field of high polymer materials, and discloses a nylon material and a preparation method and application thereof. The nylon material comprises the following preparation raw materials in percentage by mass: 70-85% of nylon resin, 8-15% of nitrogen-based flame retardant, 2-8% of phosphorus-based flame retardant and 1-8% of synergistic flame retardant. The nylon material provided by the application adds the phosphorus-based flame retardant and the synergistic flame retardant in a traditional nitrogen-based flame retardant system, so that the ignition temperature of the material is increased, the dropping speed and the dropping ignition probability are reduced, and the flame retardant performance of the material is improved. The ignition temperature of the material can reach 745 DEG C, the DSC crystallization temperature can reach 187 DEG C, the demolding effect is good, the dropping speed is slow, the dropping ignition probability is low, the performance requirements of a battery assembly product on the material can be met, and the nylon material can be used in the preparation of electronic connectors, battery compartments, low-voltage switches, housings or terminal blocks of power distribution systems of electronic and electrical equipment.

The application discloses an air conditioner wind shielding structure, which comprises a wind shielding component and a driving component. The wind shielding component is arranged corresponding to an air outlet of the air conditioner. The wind shielding component comprises a plurality of wind shielding pieces arranged coaxially, and the wind shielding pieces are rotationally connected with each other. The driving component comprises a driving source and a rotating shaft. The wind shielding pieces are rotationally arranged on the rotating shaft. The driving source drives each wind shielding piece to rotate, so that the wind shielding pieces can coincide with or separate from each other. The angle of each wind shielding piece can be adjusted to adjust the wind speed and direction during air supply, different air supply requirements can be met, the comfort of air supply is improved, and the air conditioner is suitable for household and vehicle air conditioners.

The invention belongs to the technical field of automobile active suspension damping systems, and particularly relates to a mute stiffness valve and a control method thereof. The stiffness valve is switched from an open state to a closed state, and the plunger at least comprises a first stroke section, a second stroke section and a third stroke section; in the first stroke section, first direction current is input into the voice coil motor structure, so that the plunger is in an acceleration state; in the second stroke section, current input to the voice coil motor structure is stopped and / or second-direction current opposite to the first-direction current is input, so that the plunger is in a deceleration state; and in the third stroke section, the current in the first direction is input into the voice coil motor, so that the sealing element between the plunger and the air vent is compressed and seals the air vent. By controlling the current input into the voice coil motor structure, control over the moving direction and speed of the plunger is achieved, on the premise of quick response, the impact force generated when the plunger makes contact with the sealing support is remarkably reduced, and noise generated by impact is restrained.

The utility model relates to a concrete loading and discharging structure, and belongs to the technical field of concrete production, the concrete loading and discharging structure comprises a stirring table, a concrete stirring machine arranged at the upper end of the stirring table and a discharging pipe arranged at the lower end of the concrete stirring machine, a loading plate is arranged at the lower end of the stirring table, and a first hydraulic push rod is arranged on the loading plate; a hopper-shaped receiving hopper located below the discharging pipe is arranged at the push rod position of the first hydraulic push rod, the lower end of the receiving hopper is communicated with a discharging inner pipe, a supporting pipe is arranged in the discharging inner pipe, the upper end of the supporting pipe is communicated with a plugging head which is in a circular truncated cone shape and concentric with the discharging pipe, and a gap exists between the plugging head and the receiving hopper. According to the concrete loading and discharging structure, the discharging height is adjusted and reduced, concrete splashing caused by the too high discharging height is avoided, meanwhile, the speed of discharging concrete into the receiving hopper of the tank car is reduced, and splashing and overflowing caused by the too high concrete discharging speed are avoided.