82results about How to "Control the falling speed" patented technology

The invention discloses an overhead escape device of a light rail. The device comprises an outer shell and an inner shell positioned in the outer shell, wherein an escape rope is arranged in the inner shell and two ends of the escape rope run through the same side of the outer shell and inner shell; a retarding mechanism is arranged in the inner shell and mainly comprises a round static friction block and two round kinetic friction blocks; the two movable friction blocks are symmetrically positioned on two sides of a centre line of the static friction block; the escape rope sequentially winds over one movable friction block, the static friction block and the other movable friction block; and the centre of the static friction block deviates for a certain distance from the connection line of the centres of the two movable friction blocks so that the escape rope forms a certain wrap angle with the kinetic friction blocks. The device has the advantages of low cost, convenient use, simple structure, reliable performance and convenient maintenance. The required time for the whole landing process is short and the device can be repeatedly and uninterruptedly used so that many people can conveniently and quickly escape.

The invention discloses a culture method of rice anther calluses. The culture method comprises a step of disinfecting a rice ear, and removing tops of glumes; a step of suspending the rice ear, with the rice stalk upward and the rice ear downward, in a receiving flask containing nutrient solution to perform oscillation processing; a step of transferring the receiving flask after the oscillation processing is finished and performing induction culture in the absence of light to obtain the rice anther calluses. A formula of the nutrient solution is that an SK3 basic medium contains 2.5-3 g/L of proline, 0.4-0.6 g/L of glutamic acid, 1.8-2.5 mg/L of 2-4D and 1.8-2.5 mg/L of NAA. The culture method provided by the invention has advantages of anther collection convenience, high collection efficiency, and high inductivity and reduced pollution risk of the calluses.

The invention discloses an energy-saving and environment-friendly screw extruder, relates to an extruder and aims to solve the technical problems that the extruder in the prior art is easy to block materials and waste the materials. The energy-saving and environment-friendly screw extruder is characterized by comprising an extruder body and a hopper arranged on the extruder body; at least two receiving plates are rotatably arranged in the hopper, the receiving plates are located at the lower part of a material inlet of the hopper, material conveying spaces for conveying the materials are keptbetween the receiving plates and the inner side wall of the hopper, the adjacent receiving plates are arranged in an up-down mode, the adjacent material conveying spaces are arranged in a staggered mode, and a power assembly is arranged on the hopper; when the materials need to be fed in, the materials are poured into the hopper and fall on the receiving plates, the power assembly drives the receiving plates to rotate, therefore, the speed of feeding the materials into the extruder body is controlled, and the materials may get into the extruder body smoothly; and thus, materials are reduced, which are all piled up at the hopper bottom, causing remaining materials; and extravagant materials are reduced, and the energy-saving and environment-friendly screw extruder is energy-saving and environment-friendly.

The invention discloses a coconut shell carbonization material activation furnace. The coconut shell carbonization material activation furnace comprises a combustion chamber and a furnace body, wherein the furnace body comprises a furnace wall, a hearth and a cooling section, the combustion chamber and the hearth are communicated through a first gas pipeline, a carbonization section, an additional carbonization section and an activation section which are communicated with one another are arranged in the hearth, the carbonization section is communicated with a material feeding hole, a plurality of material channels are arranged in the carbonization section, a plurality of first filter screens are arranged in each material channel, the additional carbonization section is arranged at the lower part of the carbonization section, a plurality of second filter screens are arranged in the additional carbonization section, the activation section is arranged below the additional carbonization section, a wave-shaped plate body is arranged at the bottom of the activation section, a plurality of small holes are formed in the plate body, the cooling section is communicated with the activation section, and a material outlet is formed in the cooling section. The coconut shell carbonization material activation furnace is concise in structure, economical and practical, compared with the traditional activation furnace, the coconut shell carbonization material activation furnace has the activation rate increased by 20%, and besides, the quality of a coconut shell activated carbon finished product is high, and the surface of the coconut shell activated carbon finished product is not cracked.

The invention discloses an anti-separation device for a dry-mixed mortar bin. The anti-separation device for the dry-mixed mortar bin is composed of a plurality of sleeves, a lifting device and a connecting module, wherein the sleeves are arranged in the bin, the lifting device is arranged outside the bin, and the connecting module is located between the sleeves and the lifting device. Each sleeve is in the shape of a circular truncated cone, wherein the upper portion and the lower portion of the sleeve are open, and the area of the lower opening is larger than that of the upper opening. The sleeves are connected in a sleeved mode, connected through the connecting module and vertically hung in the bin. The connecting module is composed of steel wire ropes which are fixed to the outer circumference of the bottommost sleeve and fixed pulleys at the top of the bin and soft connecting ropes which are fixed to the inner circumferences of the sleeves and the inner wall of the top of the bin. The lifting device is arranged on the top surface of the bin and comprises a motor. A plurality of take-up and pay-off rollers are connected with the motor through couplings and spaced form the motor by a certain distance. One fixed pulley is correspondingly arranged in the position a certain distance away from each take-up and pay-off roller in the vertical direction. The fixed pulleys are evenly arranged along the circle center of the top surface of the bin, so that the effect that the connecting device and the sleeve are balanced is guaranteed. The anti-separation device for the dry-mixed mortar bin is exquisite in design, low in cost and outstanding in effect and has extremely high commercial promotional value.

The invention discloses an experimental device and method for measuring a liquid viscosity coefficient through a U-shaped tube. The experimental device is composed of the U-shaped tube, a thin filament, a pulley block, a driving small ball, a driven small ball and experimental liquid. By analyzing the linkage movement of the two small balls connected to the two ends of the thin filament on the two sides of the U-shaped tube, and the liquid viscosity coefficient is obtained under the condition that the liquid density is not precisely measured and buoyancy is not calculated. According to the experimental method, by means of the stress of the small balls in the balanced state and the Stokes formula, the relation between the liquid viscosity coefficient and the terminal velocity of the small balls is acquired. The experimental method further includes the step that by changing the liquid level height, measuring the terminal velocity of the small balls and changing the average density of the driven small ball, the Reynolds number of the viscosity coefficient is corrected. The experimental device and method are clear in principle, equipment is simple, operation is fast, the falling speed of the driving small ball is effectively controlled by arranging the driven small ball, and the experimental device and method are suitable for measuring the liquid viscosity coefficient of small-viscosity liquid and are also suitable for physical experiment teaching.

The invention discloses a soil remediation device capable of accurately regulating blanking efficiency. A slide is arranged at the bottom of a table body, and a first bearing is arranged on the slide;a first bearing seat is fixedly connected with a linear conveying device; the lower end of the linear conveying device is connected with a supporting piece; a storage silo is arranged on the table body, and a stirring shaft is arranged in the storage silo; a plurality of blades are evenly distributed on the stirring shaft; a dosing hopper is connected to the storage silo, and a discharge port isformed below the storage silo; a transfer frame is placed under the dosing hopper, and the upper and lower parts of the transfer frame is open; an elastic sheet is laid in the transfer frame, one endof the elastic sheet is fixed, the other end of the elastic sheet is connected to a rotating shaft, and the rotating shaft is driven by a variable frequency motor; and a partition plate, a baffle, anda partition plate are laid from top to bottom in the dosing hopper, first through holes are formed in the partition plates, the baffle is driven by a motor to rotate, and second through holes are formed in the baffle. According to the soil remediation device capable of accurately regulating the blanking efficiency, the problems that soil remediation equipment occupies a large amount of space andis difficult to transfer in the prior art are solved, and the purposes of reducing the space occupied by storage and facilitating the movement are achieved.

The invention belongs to the technical field of industrial and agricultural production tools, and particularly relates to a smooth particle material rolling drying device. The smooth particle materialrolling drying device comprises a bottom plate, first supporting legs, second supporting legs, a first rotating roller, a second rotating roller, a conveying belt, a supporting frame, a heat supply plate, a first hopper, a mounting frame, a connecting plate, a first motor, a discharging roller, a second motor and a material returning mechanism. According to the smooth particle material rolling drying device, by the obliquely-arranged conveying belt, when materials fall onto the conveying belt, the materials roll and move downwards under the action of the gravity of the materials; and throughrotation of the first motor, the conveying belt drives the materials to have an upward trend under the action of friction force; when the materials fall down, the materials are turned over under the combined action of the gravity of the materials and friction force provided by the conveying belt; and by adjusting the rotating speed of the first motor, the upward moving speed of the materials driven by the conveying belt is balanced with the downward rolling speed of the materials under the action of self weight, the materials stay on the conveying belt for a long time, and a heat supply platecan dry the materials more evenly.

The invention discloses a drip irrigation device for field planting of pear trees. The drip irrigation device comprises device support frames, water storage tanks and a capillary net plate; the capillary mesh plate is of an annular structure; a plurality of permeation holes are formed in the surface of the capillary mesh plate; the capillary net plate is divided into a left half ring and a right half ring along a middle axis; an end side of the left half ring and an end side of the right half ring are respectively provided with water inlets; each water inlet is respectively sleeved with a rubber hose; the other end of each rubber hose is connected to the bottom end of one water storage tank; each water storage tank is fixedly arranged on one device support frame; the opening at the upper end opening of each water storage is provided with a collecting funnel; and the bottom end of each collecting funnel is provided with a one-way valve. Through the device provided by the invention, moisture evaporation is reduced, and moisture absorption of root systems of pear trees is facilitated, so that the utilization of rainwater is facilitated, water resources are saved, and the irrigation effect is obvious.

The invention discloses a uniform coal feeding device of a chain furnace. The uniform coal feeding device comprises a coal hopper, wherein the upper end surface of the coal hopper is open, a strip-shaped slag outlet is formed in the lower end of the right side surface of the coal hopper, and a control switch is arranged on the front side surface of the coal hopper. The uniform coal feeding deviceof the chain furnace is simple in structure, the separation of the large coal briquettes and the pulverized coal is realized through the separating plates, the large coal briquettes are horizontally led out to the chain through the material guide plate, the coal foam flows out of the upper side of the large coal briquette through the powder outlet, and finally falls into a gap of a large coal briquette, the coal foam is easy to fully combust, so that the combustion of the coal briquettes is accelerated, and the conversion rate of the heat energy is improved; the shifting piece can poke a mixture of the large coal briquette and the coal foam on the separating plate, so that the coal foam can fall down from the strip-shaped through hole of the separating plate, and the separation of the pulverized coal can be accelerated; the falling speed of the large coal briquette can be controlled by the coal dividing plate, the coal foam can be prevented from tracking and slipping, so that the separation efficiency is improved, and finally, the large coal briquettes and the pulverized coal are mixed.

The invention discloses a magnetic track brake application control system and method. The control system comprises a brake microcomputer unit, a brake power supply, a magnetic track brake control unit, a brake pipe and a magnetic track brake; the magnetic track brake comprises an air cylinder and a pole shoe; a piston rod of the air cylinder is fixedly connected with the pole shoe; and the controlsystem further comprises a normally-closed analog electric pneumatic valve. The magnetic track brake control unit is provided with a first current linear amplification unit and a second current linear amplification unit; the brake power supply is electrically connected with the control end of the analog electric pneumatic valve through the first current linear amplification unit; the brake pipe is connected with the air inlet end of the air cylinder through the analog electric pneumatic valve; and the brake power supply is electrically connected with a magnet exciting coil in the pole shoe through the second current linear amplification unit. When magnetic rail braking is applied, the air pressure of the air supply pipeline of the air cylinder is controlled to be linearly increased so asto control the falling speed of the pole shoe, meanwhile, linear current is output to the magnet exciting coil, it is guaranteed that a vehicle cannot generate large impact when magnetic rail brakingis switched on, and the riding comfort of passengers is improved.

The invention belongs to the field of feed production equipment, and specifically discloses a stirring device. The stirring device comprises a dry material cylinder, a material separating plate, a mixing cylinder, a nozzle for spraying liquid material, a stirrer, a motor, a driven bevel gear, a driving bevel gear, and a cam; the dry material cylinder is in a hopper shape, the lower end of the dry material cylinder is communicated with the mixing cylinder; the material separating plate is provided with a plurality of through holes, and is arranged in the lower end of the dry material cylinder; the lower end of the mixing cylinder is in a hopper shape and is provided with a material outlet; the stirrer and the output shaft of the motor are connected coaxially; the nozzle, stirrer, and motor are all arranged in the mixing cylinder; the driving bevel gear and the stirrer are connected through a same shaft; and the cam and the driven bevel gear form coaxial connection through a shaft rod. The stirring device solves the problem that the mixing device for mixing dry materials and liquid feed is easily stuck or obstructed during the application process. Compared with the prior art, the provided stirring device has the advantages that the provided stirring device cannot be stuck during the mixing process of dry material and liquid feed, the work procedure is fluent, and the work efficiency is high.

The invention relates to a sand sieving device, in particular to a multifunctional sand sieving device. The multifunctional sand sieving device comprises a machine box mechanism, a sand primary sieving mechanism, a sand secondary sieving mechanism, a sweeping device, a multifunctional secondary sieving sand discharging hopper mechanism, a supporting frame, a waste material discharging hopper and aprimary sieving sand discharging hopper. According to the multifunctional sand sieving device, sand can be subjected to primary sieving, the primarily sieved sand can be subjected to secondary sieving sequentially, and the sand of different thicknesses can be sieved out to meet use requirements; and the sand of different thicknesses can be correspondingly swept and collected, the sand can be transported, the falling speed of the sand from the discharging hoppers can be controlled, and the sand can be cleaned. The machine box mechanism is connected with the sand primary sieving mechanism, themachine box mechanism is connected with the sand secondary sieving mechanism, the sand primary sieving mechanism is connected with the sand secondary sieving mechanism, the left end of the machine boxmechanism is connected with the waste material discharging hopper, and the right end of the machine box mechanism is connected with the primary sieving sand discharging hopper.

The invention belongs to the technical field of building construction, and discloses sandstone screening equipment for building construction. According to the technical key points, the sandstone screening equipment for the building construction comprises a box body, a first filter plate is rotatably mounted on the left wall in the box body, a vertical groove is formed in the right wall in the box body, and a slide block fixedly connected with the right side wall of the first filter plate is slidably mounted in the vertical groove; a motor is fixedly installed on the right side wall of the box body, an output shaft of the motor extends into the box body and is fixedly provided with a cam tightly attached to the right bottom wall of the first filter plate, a first discharging opening is formed in the side wall of the box body on the left side of the first filter plate, and a smashing box communicating with the box body through the first discharging opening is fixedly installed on the left side wall of the box body; and an arc-shaped mashing plate is fixedly installed in the smashing box, a vibrating column is slidably installed in the smashing box above the mashing plate, the top end of the vibrating column is connected with a vibrating component, a hole cleaning component is installed between the front inner wall and the rear inner wall of the box body below the first filter plate, and the right bottom of the first filter plate is upwards connected with a lifting component.

The invention provides a modular grain counting machine, and relates to the field of packaging equipment. The modular grain counting machine comprises a plurality of grain counting mechanisms, whereineach grain counting mechanism comprises a grain counting machine body and an electric appliance control box; each grain counting machine body comprises a feeding hopper, a material vibrating disc, adischarging hopper, a servo vibration mechanical module and a discharging opening; the upper part of each electric appliance control box is slidably connected with the corresponding grain counting machine body; each servo vibration mechanical module is arranged on the corresponding grain counting machine body; each material vibrating disc is fixedly arranged above the corresponding servo vibrationmechanical module; an electric telescopic rod is arranged on the right side of the bottom of each material vibrating disc; and each discharging opening is formed in the corresponding material vibrating disc. The modular grain counting machine can be separately combined with other equipment of a production line, the multiple grain counting mechanisms can also be freely combined and used on site according to requirements of users, when the modular grain counting machine needs to be maintained, another modular grain counting machine can be used for replacing the modular grain counting machine and then is maintained, thus, normal production is not affected, when the yield is high, the multiple modules can be freely combined, production requirements are met, and the production efficiency is improved.

The invention relates to the field of preparation of disposable hygienic products, in particular to an accurate macromolecule adding device which comprises a storage hopper and a blowing pipe barrel communicating with the storage hopper, the blowing pipe barrel comprises a blowing pipe, a feeding pipe and a compressed air pipe, the blowing pipe is horizontally arranged, the outlet end of the blowing pipe is connected with a plurality of discharging pipes which are horizontally arranged in parallel, the free ends of the discharging pipes are gradually reduced to form discharging ports, the discharging pipes incline downwards to enable the discharging ports to be arranged in a high-low staggered mode, and the feeding pipe is arranged at the inlet end of the blowing pipe and communicates with the storage hopper. The included angle between the feeding pipe and the blowing pipe is 110-160 degrees, and the compressed air pipe is arranged at the inlet end of the blowing pipe and is coaxial with the blowing pipe. The device is reasonable in structure, high polymer materials can be effectively and uniformly mixed with cotton pulp/wood pulp before a core body is formed, and the yield of disposable hygienic products is increased.

The invention provides jet-type disinfection and dust removal equipment for garbage treatment. The jet-type disinfection and dust removal equipment comprises a main shell, a dust storage box and a gasjet cylinder; the bottom of the outer side of the main shell is also fixedly connected with the dust storage box, and the top of the dust storage box is fixedly and symmetrically provided with four vent holes in total; and the inner side of the dust storage box is also fixedly provided with a guide plate. The invention provides the jet-type disinfection and dust removal equipment for garbage treatment, an outer turnplate continuously rotates during treatment to enable through holes in the outer turnplate to be continuously superposed and staggered with through holes in a lower supporting plate and an upper supporting plate due to the arrangement of a shielding screen, garbage can fall off from the through holes when the through holes are superposed, at the moment, wind blown from an air nozzle can drive dust on the surface of the garbage to penetrate through the shielding screen to enter the inner side of the dust storage box, the wind can turn to flow downwards after being in contactwith the guide plate, most of dust can fall into water at the bottom of the dust storage box, and the rest air can be blown outwards through the vent holes, so that collection of the dust is more convenient, and the garbage cannot be blown outwards.

The invention discloses an automatic gasification and dosing device for a fumigation storehouse. The device comprises a dosing device body, the dosing device body is of a rectangular cylinder structure inside which a placement slot is formed, a material storage tank is arranged at the top of the dosing device body, the material storage tank penetrates through the outer wall of the dosing device body, a feeding pipe is fixedly connected with the bottom of the material storage tank, the feeding pipe is of a circular cylinder structure of which the inside is hollow, the bottom of the feeding pipeis provided with a ball, the ball matches with a sliding rail arranged on the outer wall of a material conveying roller, the material conveying roller is of an I-shaped circular cylinder hollow structure, the bottom surface of the feeding pipe is of a curved surface structure, the curved surface matches with the surface of the material conveying roller, the inner portion of the dosing device bodyis provided with the material conveying roller, and the material conveying roller matches with the feeding pipe to effectively control the falling speed of materials and avoid the inadequate fumigation caused by putting into medicines together, which cannot achieve the desired effects of pest control.