124results about How to "Stable opening and closing" patented technology

The invention relates to an electromagnetic permanent composite driving switch and an impact mechanism, comprising a permanent-magnet moving body, an electromagnetic coil, a sleeve, an upper magnetic conductive cover, a lower magnetic conductive cover, an upper force output bar and a lower force output bar, wherein the permanent-magnet moving body is arranged in a space formed by the upper magnetic conductive cover, the lower magnetic conductive cover and the sleeve which are fixedly connected, the permanent-magnet moving body is also arranged inside the electromagnetic coil, the spacing between the upper magnetic conductive cover and the lower magnetic conductive cover is more than the length of the permanent-magnet moving body, the upper and the lower ends of the permanent-magnet moving body are respectively and fixedly connected with the upper force output bar and the lower force output bar, the upper force output bar and the lower force output bar respectively penetrate through through holes in the middle of the upper magnetic conductive cover and the lower magnetic conductive cover, the permanent-magnet moving body is a single permanent magnet and a permanent ferromagnetic composite body, and the permanent ferromagnetic composite body is formed by a permanent magnet and a ferromagnet which are fixedly connected. The invention has the advantages that the overall structure is simple, the instantaneous suction without partial vibration can be formed, the opening and the closing are stable, the opening and closing actions are quick and accurate without fluctuation, and the power failure stability retention at the opening or the closing position can be realized.

The invention discloses an umbrella type wind energy conversion device and an umbrella type wind energy conversion system. The device comprises a rail rope, and a lower control box, a lower baffle block and an upper baffle block which are fixedly connected to the rail rope sequentially from top to bottom, wherein the lower control box is connected with a sliding barrel through at least one umbrella control rope; a plurality of work application umbrellas are connected between an umbrella edge and the sliding barrel; the upper control box is in engagement transmission with a chain; when the lower control box reaches an operation lower limit position relative to the ground, a first prompting signal is transmitted to make the lower control box retract the umbrella control rope, so that the work application umbrellas are unfolded under the action of wind power; and when the lower control box reaches an operation upper limit position relative to the ground, a second prompting signal is transmitted to make the lower control box release the umbrella control rope, and the upper control box moves downwards along the chain to drive the tops of the work application umbrellas to move downwardsso as to fold the work application umbrellas. By the device and the system, the work application umbrellas can be more stably unfolded and folded in the air, the phenomenon of twisting caused by redundant rope tools during unfolding and folding of the work application umbrellas can be effectively prevented, and high-power wind energy can be stably converted.

The invention discloses a system for calibrating the leak rates of vacuum leak holes of different leak indication gases. The system comprises a helium mass spectrum leak detector, a standard container, an argon source, a vacuum leak hole to be calibrated, a leak indication gas source, a constant volume chamber, a vortex molecular pump and a turbine mechanical pump; the vortex molecular pump and the turbine mechanical pump are connected with the constant volume chamber and the standard container by pipelines in sequence; one end of the vacuum leak hole to be calibrated is connected with the leak indication gas source by a pipeline, the other end is connected between the standard container and the constant volume chamber, and the helium mass spectrum leak detector and the argon source are respectively connected to the connecting pipeline. Besides, the system can obtain a conversion relation between leak rates when different leak indication gas media are quickly measured using the helium mass spectrum leak detector, via the magnitude of the leak rate of the leak hole measured by a constant volume method and in combination with the leak rates, measured by the helium mass spectrum leak detector, of vacuum leak holes of different leak indication gas media. The system is reasonable in design, simple in structure and convenient to operate, and can be used for calibrating the leak rates of vacuum leak holes of different leak indication gases.

The invention discloses a passive-trigger-type space debris capturing device. The passive-trigger-type space debris capturing device comprises two capturing storage bins, a trigger system and a base, wherein the trigger system and the base are connected between the two capturing storage bins, and the trigger system and the base are connected. The capturing storage bins comprise storage bin bodies and storage bin connecting rod assemblies connected with the storage bin bodies; and storage bin openings are formed in the storage bin bodies, the storage bin connecting rod assemblies are connected with the base, and the trigger system comprises a motor, a lead screw driving system, a sliding-block-type opening and closing system and a spring trigger. The passive-trigger-type space debris capturing device has the beneficial effects that the space debris capturing device belongs to a passive cleaning method, space debris can be effectively acquired through an integral enveloped-type structure of the two capturing storage bins, and the debris is acquired passively by arranging the trigger system; and because the debris is cleaned mainly depending on natural factors of the outside world, the consumed energy is extremely little, and the cost is reduced.

Provided is an airbag type umbrella-shaped wind energy conversion device and system. The device comprises a piston rod connected to a track rope in a sleeved mode, a piston and a piston cylinder and is regulated and controlled through cooperation between an upper control box and a sliding cylinder type lower control box; a plurality of middle umbrellas are connected between an upper airbag type work doing umbrella and a lower airbag type work doing umbrella in series through a traction rope; according to the main function of air bags in the work doing umbrellas, the inflated air bags distributed on umbrella covers are matched with the piston rod, the piston and the piston cylinder to form a basic frame structure so that the work doing umbrellas can be actively and regularly open, the work doing umbrellas, an umbrella control rope, thin ropes, an upper control rope, a lower control rope and the traction rope are combined to form a special-shaped cage-shaped framework structure so that the whole work doing umbrella can form a multi-umbrella-cover wind-receiving work doing body, the airbag type wind energy conversion devices are connected in series, and large-scale high-power conversion of wind energy can be achieved more easily. When the air bag type work doing umbrellas descend, gas in the air bags is stored in a closed space formed by the piston rod, the piston and the piston cylinder, and therefore the air bag type work doing umbrellas can be regularly folded.

The invention discloses a planetary hidden type hinge structure. The planetary hidden type hinge structure comprises a fixed frame, wherein the front side surface of the fixed frame is fixedly equipped with a side cover plate which is fixedly equipped through a plurality of screws which are distributed at equal distance; a rotary support frame is mounted between the upper surface of the fixed frame and the side cover plate; a gear shaft which is matched with the rotary support frame is mounted on the rotary support frame; a friction plate is fixedly arranged outside the gear shaft in a sleeving mode; a tightening nut is arranged between the friction plate and the side cover plate; a plurality of gaskets are arranged between the friction plate and the tightening nut; and a plurality of elastic sheets are further arranged between every two gaskets. The working principle of a planetary inside engaged gear is utilized, so that the support frame can perform circular motion; and moreover, twisting force is increased through the elastic sheets and an oil storage friction plate in a rotary process, so that the support frame can be stably opened and closed at any angle, and therefore, certain pause effect is achieved.

The present invention belongs to the field of mechanical technology, and is especially skylight structure in the panoramic glass on the top of automobile and aims at providing automobile with both excellent lighting effect and good ventilating effect. The skylight structure in panoramic glass fixed to the metal ceiling of the automobile includes skylight opening in the panoramic glass, and skylight with skylight body fixed to the metal ceiling by means of fixture. The skylight structure results in excellent lighting effect and good ventilating effect of the automobile and has high use stability.

The invention discloses a sliding door device, which comprises a door column and a transmission cavity formed in the door column. The door column is internally provided with an opening groove at the lower end of the transmission cavity and opposite storage grooves located at the left and right ends of the opening groove, first transmission shafts extending up and down are rotatably connected to the inner walls of the top ends of the storage grooves in a fit mode, threaded sleeves are fixedly connected to the first transmission shafts, and connected with threaded rods in a threaded fit mode, rolling brushes are fixedly connected to the lower ends of the threaded rods, a first belt pulley located in the transmission cavity is arranged at the position, at the left end, of the first transmission shaft, and a second belt pulley located in the transmission cavity is arranged at the position, at the right end, of the first transmission shaft. According to the sliding door device, the structure is simple, production is convenient, a door frame is internally provided with the storage grooves, and thus the space is utilized to a maximum extent.

The invention relates to a component of a roller washing machine door, in particular to the component of to the roller washing machine door for stably operating. Therefore, the component of the roller washing machine door of the invention comprises a front face supporting rack provided with a handle part at one side, an antiskid component installed on the handle part; a rear supporting rack combined at the rear part of the front face supporting rack; and a fixed handle cover part covering the periphery of the antiskid part and inserted between the front supporting rack and the rear supporting rack. The invention is provided with the antiskid component on the handle, and a user can stably operate and close and open the door. More particularly, during the washing process, even if the water is existent on the hand of the user, the door also can be opened and closed stably due to the hand contacting with the antiskid component.

The invention discloses a hydraulic boosting valve which comprises a valve body, a valve core and a valve rod, wherein the valve body is provided with a containing cavity, the valve core is slidably arranged in the valve body, the valve rod is rotatably arranged on the valve body, the valve body is arranged below the valve rod and is respectively provided with a water inlet channel and a water outlet channel which are communicated, and the valve core is positioned between the water inlet channel and the water outlet channel. The hydraulic boosting valve has two operating states, the first operating state refers to an off state while the second operating state refers to an on state, and the hydraulic boosting valve has a third operating state referring to a pressure reducing and pressure stabilizing state. At the third operating state, a first channel, a second channel and a third channel are communicated with one another by the aid of the three-way valve core, and the valve rod rotates to enable the three-way valve core to rotate so that the water inlet areas of the first channel and the second channel are adjusted, and then the hydraulic boosting valve is positioned at the third operating state, namely, the pressure reducing and pressure stabilizing state. The hydraulic boosting valve is simple in structure, reasonable in design, light, rapid and stable in on and off and stable in pressure reduction and pressure stabilization.

The present invention discloses an umbrella ladder combination high-altitude solar power generation system which comprises a track rope with a certain angle on the ground and a plurality of solar power generation groups fixed on the track rope. Each of the solar power generation groups comprises a sliding cylinder, a lower stopper, an upper stopper and a lifting umbrella which are fixedly connected to the track rope in order from bottom to top. A plurality of thin ropes are connected between the umbrella edge of the lifting umbrella and the sliding cylinder, and the top center of the lifting umbrella sleeves the track rope. The surface of the lifting umbrella is provided with a layer of solar film which is connected to a solar energy storage device. According to the system, the solar film is arranged on the surface of the lifting umbrella and the solar film is lifting to a high altitude through the track rope to carry out solar energy collection and power generation, the influence of weather and other factors is avoided, the whole power generation system is arranged in the high altitude, the ground space is not occupied basically and the illumination is strong, the energy conversion rate is higher, and the high-altitude wind energy acquisition also can be carried out. The cooperation of an upper control box and a lower control box are used to control the opening and closing of the lifting umbrellas, and the system is convenient to withdraw and transfer.

The invention provides a resin production system, comprising a polymerization reaction kettle, a vertical condenser, a horizontal condenser and a buffer recovery tank, wherein the polymerization reaction kettle is provided with a feeding hole and a gas outlet hole; the gas outlet hole is communicated with a tube pass entrance of the vertical condenser, a tube pass exit of the vertical condenser iscommunicated with a tube pass entrance of the horizontal condenser, a tube pass exit of the horizontal condenser is communicated with an inlet of the buffer recovery tank, and an outlet of the bufferrecovery tank is communicated with the gas outlet hole. The resin production system is provided with the vertical condenser and the horizontal condenser which are cooperatively used, thus guaranteeing the condensation effect of ethyl acetate gas; the buffer recovery tank is arranged, and the whole system is enabled to form a closed loop, so that the system is not limited by the high temperature vaporization of ethyl acetate, the cooling time is shortened, the system power consumption and energy consumption are reduced, the machine abrasion is reduced, and the production cost is further lowered; furthermore, part of the uncondensed ethyl acetate gas is recovered by means of the buffer recovery tank and is not discharged into the atmosphere, so that the pressure for environmental protectionis reduced.

The invention discloses an ejection system and an operation method thereof. The ejection system comprises an upper fixing plate, a front die plate fixed below the upper fixing plate, a front die core fixed in the front die plate, a lower fixing plate, square iron fixed to the lower fixing plate, a rear die plate fixed to the square iron and a rear die core fixed in the rear die plate. An ejector groove is formed in the lower fixing plate, the square iron, the rear die plate and the rear die core in a penetrating manner. An ejector is arranged in the ejector groove. An insert used for carrying a to-be-ejected product is arranged at the top end of the ejector. In addition, a first ejection pin device and a second ejection pin device are sequentially arranged in the square iron and around the ejector from bottom to top. The first ejection pin device and the second ejection pin device are connected through a mechanical opening and closing device. In the square iron, the width of the upper end portion is smaller relative to the width of the lower end portion, the width of the first ejection pin device is smaller than the width of the upper end portion of the square iron, and the width of the second ejection pin device is larger than the width of the upper end portion of the square iron and smaller than the width of the lower end portion of the square iron.

The invention discloses a drawing die used for manufacturing an axial lock housing. The drawing die used for manufacturing the axial lock housing is high in stability during a production process and higher in rate of finished products. The drawing die used for manufacturing the axial lock housing comprises a die shank (1), an upper die plate (2), an upper die base plate (3), an upper fixed plate (4), a first elastomer (5), a stripper plate (6), a lower die plate (9), a lower die base plate (10), a lower fixed plate (11), a moving die sleeve (7), a lower die (8) and a moving die (12), wherein the upper fixed plate (4) is provided with a male die (14); the male die (14) and a first hole (13) are in clearance fit, so that the lower part of the male die (14) can extend outside the first hole (13) and enters a molding hole (5) during a die assembly process; the molding hole (5) is in the clearance fit with the moving die (12); the lower end of the moving die (12) is located a third hole (17) arranged on the lower fixed plate (11) and used for axially limiting the moving die (12); the lower end of the moving die (12) is abutted with one end of an ejector rod (18) in the third hole (17); a support plate (19) is arranged below the other end of the ejector rod (18); and a second elastomer (20) is arranged between the support plate (19) and the ejector rod (18).

The invention discloses an artificial heart valve. The artificial heart valve comprises a stent, valve leaflets, a suture membrane, suture lines and a clamping piece. The stent comprises an outer stent and an inner stent. The outer stent is spherical so as to be attached to and connected with the atrium in a supporting mode. The inner stent is cylindrical and is arranged inside the outer stent. The valve leaflets are arranged in the inner stent and used for replacing an original heart valve. The suture membrane is attached to the outer stent and the inner stent. Suture holes are formed in theinner stent. The valve leaflets penetrate through the suture holes and are sutured with the clamping piece through the suture lines. According to the artificial heart valve, a valve device can be fixed in the heart more stably and is not easy to shift; meanwhile, the valve is better matched with the physiological structure of the heart, so that perivalvular leakage is reduced; and damage of the valve to the ventricle and the subvalvular structure is reduced, the outer stent plays a role in protecting the inner stent and the valve leaflets, and the influence of compression of the inner stent and the valve leaflets by heart primary tissue on valve leaflet movement can be reduced. The service life of the artificial heart valve is prolonged.

The invention provides a powder tank truck manhole cover opening and closing control system. The powder tank truck manhole cover opening and closing control system comprises a powder tank truck uppercover, a manhole groove and a manhole cover plate; the manhole groove is formed in the powder tank truck upper cover; the manhole cover plate is connected to the top of the manhole groove in a slidingmode, wherein the manhole cover plate is connected to the inner side of the powder tank truck upper cover in a sliding mode; a similar horizontal pushing type driving mechanism used for driving the manhole cover plate is further formed in the powder tank truck upper cover; and a positioning mechanism used for positioning the manhole cover plate is further arranged in the powder tank truck upper cover. According to the powder tank truck manhole cover opening and closing control system, by arranging an air cylinder, a second touch switch, a first touch switch, a main control switch and a driving air cylinder, the air cylinder can be remotely controlled to extend and retract through the main control switch, and then the manhole cover plate is driven to move, so that opening and closing of the manhole groove are achieved; and therefore, automatic control is achieved, and time and labor are saved; and when the manhole groove is closed, the main control switch controls the air cylinder to drive the manhole cover plate to be closed, and the second touch switch touches a transmission block.

The invention relates to the field of medical treatment, in particular to a medical waste classification and recovery device for a cardiovascular department. The closing of the device can be completedthrough a closed frame combination body to prevent waste in the device from being exposed. The medical waste can be crushed through an extruding and crushing combination body, and the crushing effectof the extruding and crushing combination body can be adjusted. The transportation of the medical waste can be realized through an inner end transportation combination body. The medical waste can beclassified through a separation combination body. The medical waste classification and recovery device comprises the closed frame combination body, the extruding and crushing combination body, a buffering combination body, the inner end transportation combination body, an auxiliary fixing frame and the separation combination body. When a pushing device is pushed by elastic force of a diving springand slides to the middle end of a middle end sliding column, the pushing device automatically slides to the upper end of the middle end sliding column under the action of the component of acting force of an elastic force of the driving spring in the vertical direction, and meanwhile, a closing plate is more stably opened and closed under the action of the component of acting force of an elastic force of the driving spring in the vertical direction.

The invention provides a refrigerator door opening and closing control method based on angle and angular velocity, computer readable storage media and a refrigerator. The method comprises the steps that angle and angular velocity data of a refrigerator door are detected in real time, the opening and closing state of the refrigerator door is judged by analyzing the angle and the angular velocity, amotor is controlled to operate according to the opening and closing state of the refrigerator door, and therefore the speed of the refrigerator door is controlled. According to the refrigerator dooropening and closing control method based on the angle and the angular velocity, the computer readable storage media and the refrigerator, the angle and the angular velocity are judged, and the motor is intervened in the closing process of the refrigerator door, so that the secondary spring opening of the refrigerator door and the toppling of objects in the refrigerator caused by excessive force are avoided, and the refrigerator door are ensured to be stably closed.

The invention discloses an electromagnetic valve for realizing pressure adjusting through mechanical force transmission. The electromagnetic valve for realizing pressure adjusting through mechanical force transmission comprises a pressure adjusting device. The pressure adjusting device comprises a pressure adjusting cylinder body, a high pressure gas exhaust plug, a low pressure gas inlet plug, anelastic supporting piece, a low pressure gas inlet cap, a high pressure gas exhaust cap and a middle push-and-pull connecting rod. The high pressure gas exhaust cap, the low pressure gas inlet plug and the elastic supporting piece are accommodated in a hollow cylinder body of the pressure adjusting cylinder body; the high pressure gas exhaust plug and the low pressure gas inlet plug are correspondingly arranged at the two ends of the elastic supporting piece; a low pressure gas inlet is formed in the high pressure gas exhaust plug; the low pressure gas inlet cap covers the low pressure gas inlet; a high pressure gas exhaust hole is formed in the low pressure gas inlet plug; the high pressure gas exhaust cap covers the high pressure gas exhaust hole; and the low pressure gas inlet cap andthe high pressure gas exhaust cap are connected with each other through the middle push-and-pull connecting rod. According to the electromagnetic valve for realizing pressure adjusting through mechanical force transmission, by arranging the pressure adjusting device, the pressure of a valve body can be automatically adjusted to realize balance of inside and outside pressures.

The invention discloses a hydraulic-drive movable bridge. The hydraulic-drive movable bridge comprises a bridge steel body, a riverway, mounting bases, supports, oil cylinders, support columns, buzzermounting racks, mounting grooves, travel switches, hydraulic transmission systems and well slots and is characterized in that the mounting grooves are symmetrically formed in two sides of the riverway, one mounting base is mounted on one side, away from the riverway of each mounting groove, one support is mounted on the upper surface of each mounting base through bolts, each support is rotatablyconnected with the corresponding end of the bridge steel body, one oil cylinder is rotatably mounted at the bottom of each mounting groove, and the top end of each oil cylinder is rotatably connectedwith the bridge steel body. The hydraulic-drive movable bridge has the advantages that the opening and closing the movable bridge are controlled through the hydraulic ejector pins of the hydraulic transmission systems, the opening and closing can be completed stably, and vibration and noise are reduced to improve the environment of a park; the hydraulic transmission control adopts oil return oil filters and high-pressure filters, hydraulic oil returning oil tanks can be kept clean, hydraulic component abrasion is reduced, and hydraulic system faults are prevented.

The invention discloses a horizontal injection press which comprises a working table, an injection molding mechanism, a fixed pressing plate, a movable pressing plate, a formwork plate, a horizontal driving mechanism, a guide rail and a plurality of guide columns; the movable pressing plate and the formwork plate slide in the extending direction of the guide columns, and the horizontal driving mechanism comprises a sliding table, a first transmission belt, a second transmission belt, a first connecting rod, a second connecting rod, a first main shaft nut, a second main shaft nut, a first driven belt wheel, a bearing plate, at least one driving motor, a driving sliding wheel, a first main shaft with an external thread and a second main shaft with an external thread; and the bearing plate and the driving motor are fixedly arranged on the working table, and the sliding table is arranged on the guide rail in a horizontally-sliding manner. The horizontal injection press is simple in structure and low in cost, the die opening and closing accuracy is high, multiple dies can be subject to injection molding through one-time injection molding operation, the injection molding efficiency is high, and the injection molding quality is good.

The invention discloses a multifunctional cabinet door hinge. The multifunctional cabinet door hinge comprises a door hinge groove-type pulling rod, a door hinge groove-type connection rod, a door hinge base, a frame hinge groove-type pulling rod, a frame hinge groove-type connection rod, a frame hinge base and a groove-type adjustment support, wherein one end of each of the door hinge groove-type pulling rod and the frame hinge groove-type pulling rod is a straight arm, and the other end is an arc-shaped bent arm; one end of each of the door hinge groove-type connection rod and the frame hinge groove-type connection rod is a straight arm, and the other end is a bent arm; the arc-shaped bent arm end of the door hinge groove-type connection rod is movably connected onto the door hinge base through a pin shaft, and the straight arm end of the door hinge groove-type connection rod is movably connected onto the bent arm end of the frame hinge groove-type connection rod through a pin shaft; the straight arm end of the door hinge groove-type connection rod is connected onto the door hinge base through a pin shaft, and the bent arm end of the door hinge groove-type connection rod is connected onto the straight arm end of the frame hinge groove-type pulling rod through a pin shaft; the groove-type adjustment support is fixed on the frame hinge base through a fastening screw; and an adjustment screw for adjusting assembly angles is further arranged between the groove-type adjustment support and the frame hinge base.

The invention relates to the technical field of packaging beverage conveying equipment, in particular to a craft beer filling and capping machine. The machine comprises a workbench, wherein the workbench is provided with a filling mechanism and a cap screwing mechanism, the workbench is provided with a conveying mechanism for conveying empty wine bottles to the filling mechanism and conveying thewine bottles finishing filling to the cap screwing mechanism, the filling mechanism comprises a mounting frame rotated relative to the workbench, a plurality of long tube filling valves are fixed on the mounting frame in the circumferential direction, a rotating table used for bearing the beer bottles is rotatably arranged below the mounting frame, a guide plate mechanism, a bottle feeding shifting wheel and a bottle discharging shifting wheel are arranged between the conveying mechanism and the rotating table, wherein the bottle feeding shifting wheel is used for guiding the beer bottles fromthe conveying mechanism to the rotating table, the bottle discharging shifting wheel is used for exporting the beer bottles from the rotating table to the conveying mechanism, the bottle feeding shifting wheel and the bottle discharging shifting wheel are in a chain gear structure, and the side faces, facing the bottle feeding shifting wheel and the bottle discharging shifting wheel, of the guideplate mechanism are in arc shapes. According to the machine, the liquid level is changed from bottom to top until filling is finished, and the filling process is stable.

The invention relates to the technical field of elevator car doors, and discloses an intelligent elevator car door control device. The control device comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with an elevator car frame, the upper surface of the bottom plate is fixedly connected with a damping device, and the rear side of the elevator car frame isfixedly connected with the front surface of an elevator car body. According to the intelligent elevator car door control device, a motor drives a first connecting shaft to rotate, the first connectingshaft drives a first vertical bevel gear to rotate, a first transverse bevel gear drives the second connecting shaft to rotate, the second connecting shaft drives a second transverse bevel gear to rotate, and a second vertical bevel gear drives a transverse shaft to rotate, so that the transverse shaft drives a pinion to rotate, the transverse shaft drives a large gear to rotate, a first rack drives a curved plate to move left and right under limiting of a transverse rod, then the curved plate drives connecting legs to move, the connecting legs drive the elevator car doors to move left and right, and the two car doors can be opened and closed more stably.

The invention discloses an automatic mute sliding wooden door. The automatic mute sliding wooden door comprises a wooden door body (1), the upper side and the lower side of the wooden door body (1) are symmetrically provided with moving mechanisms (2), and each moving mechanism (2) comprises a guiding rail (4) arranged on the two sides of the wooden door body (1); a T-shaped connecting rod (3) isarranged between the wooden door body (1) and the guiding rail (4), one side of the T-shaped connecting rod (3) is fixed to the wooden door body (1), the other side of the T-shaped connecting rod (3)is provided with a mute wheel (5), and the surface of the mute wheel (5) is attached to the guiding rail (4); and the lower part of the wooden door body (1) is provided with a sliding block (6), the sliding block (6) is internally provided with a nut (8), a lead screw (7) is arranged in the nut (8) in a penetrating mode, the lead screw (7) meshes with the nut (8), and the end part of the lead screw (7) is provided with a motor (9). The automatic mute sliding wooden door has the advantages of being convenient to open and close and capable of reducing noise.

The invention discloses a fluidity detection device for concrete powder, which relates to the field of concrete detection. The fluidity detection device comprises a base, a plurality of measuring instruments are arranged on the base at intervals, a rack is arranged on the base, and a stirring box located right above the measuring instruments is arranged on the rack; the lower end of the stirring box is open, and a switch mechanism for controlling the stirring box to be opened and closed is arranged on the rack; a feeding box located above the stirring box is arranged on the rack, a partition plate is vertically arranged in the feeding box, and the feeding box is divided into a powder box and a water tank through the partition plate; a feeding pipe and a water inlet pipe which are communicated with the stirring box are arranged on the powder box and the water tank; and a feeding switch part and a water inlet switch part for controlling the opening and closing of the powder box and the water tank are arranged on the rack. Compared with the prior art, the device has the following advantages and effects that by arranging the high-automation detection device, automatic batching and simultaneous batching of different powder materials are achieved, automatic detection and simultaneous detection of the different powder materials are achieved at the same time, the batching and detectionefficiency of the powder materials is improved, and the effect of efficient detection is achieved.

The invention discloses a stably opening and closing non-return hydraulic valve which comprises an oil inlet pipe and a main oil pipe. A pressure stabilizing column is arranged at the top of the oil inlet pipe, the oil inlet pipe is communicated with the pressure stabilizing column and welded with the main oil pipe, and a pressure stabilizing oil outlet is formed in the side face of the pressure stabilizing column and communicated with the pressure stabilizing column. When hydraulic oil passes the stably opening and closing non-return hydraulic valve and when the pressure of the hydraulic oilentering the valve from the oil inlet pipe is insufficient, the hydraulic oil cannot enter the main oil pipe through an extrusion spring seat, the hydraulic oil can be stopped from returning by increasing hydraulic oil and extruding a ball at the moment, a rubber washer is arranged at an inlet, the hydraulic oil can be stabilized, oil leakage is prevented, pressure is stabilized and adjusted whenthe oil is discharged from the pressure stabilizing oil outlet of the pressure stabilizing column, and a first spring and a second spring are stressed to stably open and close the valve, so that the hydraulic oil is fed and discharged.