202results about How to "Simple and scientific structure" patented technology

The invention discloses a box packing machine with an upward opening cover, which comprises a box suction forming mechanism, a box conveying mechanism, a feeding mechanism, an inner bolt pressing mechanism and a bolt inserting mechanism. The feeding mechanism is arranged above the box conveying mechanism, the inner bolt pressing mechanism and the bolt inserting mechanism are respectively mounted on the box conveying mechanism with a box conveying rail consisting of baffle plates, the box suction forming mechanism is mounted at an end of the box conveying mechanism, and the bolt inserting mechanism is provided with a box covering block. The box packing machine is characterized in that a device for gapping a bolt surface of a box body and the packaged is arranged on the box conveying mechanism. By the aid of the structure, a bolt on a packaging box can be effectively, rapidly and smoothly inserted into the box body and cannot be folded due to collision with the packaged, working efficiency is high, and the working speed and the box packing effect of the box packing machine are effectively improved.

The service life of a traditional LED (light-emitting diode) lamp can be directly affected by heat dissipation effect of chips, and accordingly a larger aluminum alloy cooling fin is arranged on the top of the LED lamp so as to reduce the temperature by air circulation. When the power of the LED lamp becomes larger, the size of the aluminum alloy cooling fin increases to dissipate the heat by air circulation. According to this arrangement, the heat dissipation effect is affected in harsh and hot climate and the cost of the larger aluminum alloy cooling fin is high. By means of utilizing diverse physical phenomena and reverse thinking, the channelized LED lamp is capable of gathering the heat in narrow channels so as to enable the heat produced rapidly to cause temperature difference and air circulation. Due to setting temperature limitation, the wind can be blown out frequently and heat dissipation effect is consistent in high-temperature regions and hot weather. The channelized LED lamp is simple and scientific in structure and the aim of natural ventilation can be achieved by the gas flue effect without the huge cooling fin. Accordingly, a large number of aluminum alloy materials can be saved, the low-cost, low-carbon, energy-saving and environment-protection effect of the channelized LED lamp can be achieved and the country and the people can benefit from the channelized LED lamp.

The invention relates to an article contour recognition device and method. An infrared light curtain machine for contour recognition comprises a door frame, a reflection light curtain and a transmission light curtain, wherein the transmission light curtain comprises a transmitter and a receiver; the reflection light curtain is transversely mounted above the door frame; the transmitter of the transmission light curtain is mounted on one side of the vertical direction of the door frame, and the receiver of the transmission light curtain is mounted on the other side; and the output signals of the reflection light curtain, the transmitter of the transmission light curtain and the receiver of the transmission light curtain are connected into a decoder. In the article contour recognition system and method, the output signals of the reflection light curtain of the infrared light curtain machine and the transmitter and receiver of the transmission light curtain are connected into the decoder; the decoder transfers the treated real-time data to an industrial control machine through a serial port; the industrial control machine establishes three-dimensional coordinates through a software treatment system; and the height direction of an article is regarded as a Z axis, the width direction of the article is regarded as a Y axis, and the moving direction of the article is regarded as an X axis so as to realize three-dimensional contour recognition and intelligent measurement of the size of the article passing through the door frame of the light curtain machine at a constant speed.

The invention discloses an automatic terminal riveting mechanism, which comprises a pedestal, and a terminal conveying mechanism and a terminal pressing mechanism which are respectively arranged on the pedestal, wherein the terminal pressing mechanism is positioned in the output direction of the terminal conveying mechanism; a pressing die driving assembly is arranged on the lower side of the pedestal; the terminal conveying mechanism can convey terminals to the terminal pressing mechanism according to certain frequency; and the pressing die driving assembly controls the terminal pressing mechanism to press the terminals through a connecting mechanism, and the terminals can be continuously pressed by continuous circulation. Because the terminal conveying mechanism and the terminal pressing mechanism are arranged on the same pedestal and collocated correspondingly, the conveying precision of the terminals is improved; the pressing die driving assembly is arranged on the lower side of the pedestal, so the automatic terminal riveting mechanism is simple and scientific in structure, low in cost and very convenient to maintain and eliminate faults; and because the gravity center of the whole automatic terminal riveting mechanism is on the lower part, the stability, the safety and the terminal pressing precision of the terminal riveting mechanism are improved.

The invention relates to a novel vortex-preventing cone for water feeding of a water pump, belonging to the technical field of hydraulic engineering. The vortex-preventing cone is arranged under a suction flared pipe nozzle of the water pump, the tip of the vortex-preventing cone is just opposite to the center of the suction flared pipe nozzle of the water pump, vortex-preventing teeth are arranged on the conical surface of the vortex-preventing cone, and the plane area of the vortex-preventing cone is more than the area of the suction flared pipe nozzle of the water pump. The uneven vortex-preventing teeth are arranged on the conical surface of the vortex-preventing cone, and the section shape of a rack of the vortex-preventing teeth is rectangular or triangular or trapezoidal. A cone axial line of a flat cone and a pipe core line of a suction flared pipe of the water pump are arranged on the same straight line. The invention has the advantages of simple and scientific structure and reasonable design; the primary basis of a vortex strip is destroyed from the starting point of the vortex strip, circular quantity of water flow in a water inlet region can not accumulate, and the condition of generating high-intensity vortexes is deprived, the water flow in the water inlet region is smooth, the pressure fluctuation is reduced, and the pump vibration is avoided. The invention is suitable for inlets of various water pumps, ensures no vortex or corresponding hydraulic vibration, reduces hydraulic loss and improves properties of pumps.

The invention relates to VDMOS and IGBT power device with composite grid and self-isolated grid-source. Wherein, it sets a thermal-oxidized SiO2 grid between source and multicrystal Si grid, and adds a Si3N4 layer to form a composite grid together with last grid to increase grid yield. Compared with prior art, this invention increase can fast shield grid window and generate only -very-thin oxidation layer to simplify manufacture technology, and needs low cost.

The invention discloses a frame of cultivation hedgerows for a fruit tree rain shelter green house, a bracket of which is of a 'V' shape and composed of a column, a beam and skew girders. The angle between the skew girders is 110 to 120 degrees; a line connecting the peak of the column and the two ends of the beam is a circular arc, which is stretched between the corresponding brackets. Among the six lines, the three lines corresponding with the column peak and two ends of the beam form a fixed frame for laying the rain shelter green house, while the three lines between the peaks of an inverse triangle formed by the corresponding bracket beam and skew girders form a fixed frame for fruit branch location. The invention has the advantages of simple and scientific structure, sound construction, low cost and durable in use; the fruit trees can form high stems and growing planes for V-shaped inclined branches, thus overcoming the problems of irregular branch growing and forming no single plane owing to lack of location frames, bad Photosynthesis and inconsistence of fruiting positions, which is favorable for fruit branch location, convenient for pruning and drug spraying and can reduce the frequency of diseases and insect pests, reduce the utilization quantity of pesticide, prevent from fruit cracking and is good for improving the fruit quality.

The invention discloses an automatic coupling device from an optical fiber laser device to a single mode optical fiber. An input end of a first optical fiber collimator is connected with an output end of the optical fiber laser device; a collimating laser beam is output to a telescope system composed of a first convex lens and a second convex lens fixed to a one-dimensional piezoelectric ceramic translation table, and the collimating laser beam is coupled to the single mode optical fiber through a second optical fiber collimator arranged on a two-dimensional piezoelectric ceramic translation table; the collimating laser beam is divided into two paths through a single mode optical fiber coupler, wherein one path is converted into an electric signal through a photoelectric detector, the electric signal enters into a controller, the controller sends a control signal according to a value of the photoelectric signal to control a driver to drive a one-dimensional piezoelectric ceramic and a two-dimensional piezoelectric ceramic so as to form a closed-loop control system, and the other path is output for use. The automatic coupling device has the advantages of high structural coupling efficiency, self-adaptive temperature, external-environment-change such as vibration and the like resistance, reliable running, low fault rate and the like. The automatic coupling device is widely applied to the fields of precise light spectrum, quantum optics and others using the optical fiber laser device.

The invention discloses a heat-dissipation LED stress lamp cap with high efficiency and large power, comprising an independent general lamp body consisting of a lamp body shell, an electric apparatus chamber cover, a light transmission shielding plate, an LED light source component, an optical management device, an LED driving control circuit, a lamp body upper cover, a head cover, an installation cover and a sealing ring; the lamp body shell, the lamp body upper cover and the light transmission shielding plate enclose a sealed chamber; the LED light source component is arranged in the chamber and is closely attached to the lower surface of the upper cover of the lamp body; the external side of the upper cover of the lamp body is provided with a plurality of heat dissipation ribs which are used for increasing the whole heat dissipation area of the lamp cap; the optical management device is arranged at the LED light source component; simultaneously, the lamp body shell and the electric apparatus chamber cover plate enclose another sealed chamber; the chamber body is internally provided with the LED driving control circuit. The LED street lamp cap has the advantages of scientific, reasonable and simple structure, easy production and manufacture, low cost, convenient installation and assembly, good heat dissipation effect, high luminescence efficiency and long service life.

The invention relates to the technology of beneficiation machinery, in particular to a hyperfine high-gradient magnetic separator which is suitable for deironization and extraction of non-metal minerals and beneficiation of weak magnetic minerals. The hyperfine high-gradient magnetic separator comprises a main body equipment part and a rectifying control cabinet part, and the main body equipment part comprises a main body support, a magnet yoke, a magnet exciting coil and a magnetic medium box, wherein the magnet yoke is arranged on the upper part of the main body support; the magnet exciting coil is arranged around the magnet yoke; the magnetic medium box is arranged at a gap of the centre of the inner side of the magnet yoke, and the upper part of the magnetic medium box is connected with a vibration mechanism; pipe systems for enabling ore pulps to flow in and flow out and washing water to flow in and flow out are arranged at the two sides of the exterior of the magnet yoke; the pipe systems comprise various pneumatic valves, electromagnetic valves and ball valves; the pipe systems are connected with the magnetic medium box; and the rectifying control cabinet part comprises an excitation magnet and an breakage magnet, as well as a control system, wherein the excitation magnet and the breakage magnet are used for controlling the magnet exciting coil, and the control system is used for controlling actions and resetting of each valve in the pipe system, and controlling error alarming and resetting. The invention is the most ideal non-metal deironization equipment which has the advantages of strong mine-feeding granularity, concentration and grade fluctuation adaptability, reliable work and convenient operation and maintenance.

The invention provides a novel 90-degree variable-curvature bent pipe, belonging to the technical field of fluid engineering. The central arc line of the bent pipe is a variable-curvature arc line with a gradually increased curvature or a quarter elliptic type line, each cross section perpendicular to the central arc line is a circular cross section, the circular cross section is a circular surface the diameter (D) of which is equal to that of an inlet orifice and an outlet orifice of the bent pipe, two side of the inner wall of the bent pipe are symmetrically provided with ribs, the thickness of the ribs is 0.005D, the height is 0.05D, the molded lines of the ribs and the central line of the bent pipe are arranged in the same curved surface, and the distance from the two ends of the ribs to the inlet and outlet orifices are respectively the length of the diameter (D) of 0.33-0.36 orifices. The novel 90-degree variable-curvature bent pipe provided by the invention has a scientific and simple structure and reasonable design, can restrain dean vortex, reduce the resistance loss by 4-8% caused by the dean vortex and improve the hydraulic efficiency of the whole pipeline or mechanical equipment system.

The invention relates to the technical field of planting tools, in particular to a multifunctional quantitative sowing device, comprising a fixed plate, a roller is provided at the left end of the fixed plate, and a connecting beam is fixedly connected to the right end of the fixed plate, and the top of the fixed plate is sequentially arranged from left to right A seed storage box, a fertilizer box and a water tank are provided, and a quantitative seeding device is provided at the outlet of the storage box, and a ditching plowshare is fixed on the left side of the storage box at the bottom of the fixed plate, and a plowshare is fixed at the bottom of the fertilizer box. A screw is provided on the pipe, and the screw is rotatably connected to the discharge pipe, and a reverse plowshare is connected to the bottom end of the fixed plate on the right side of the discharge pipe, and a soil pressing device is provided on the right side of the reverse plowshare. There is an opening at the connection between the right end of the plate and the connecting beam, and a shunt pipe is fixed on the top of the fixed plate on the left side of the opening, and a plurality of nozzles are fixedly connected to the bottom of the shunt pipe. This device can realize ditching, sowing, fertilization, and soil filling. , watering, the whole sowing process is completed at one time, it can be sown in a large area, the planting benefits are good, and it is worth promoting.

The invention relates to a three-way thermostatic adjustable mixing valve. A cold water inlet is arranged on a valve body, a cold and hot water mixed outlet which is opposite to the cold water inlet is arranged on the valve body, a hot water inlet is arranged on the valve body perpendicular to the cold water inlet, a temperature-adjusting hand wheel device corresponding to the hot water inlet is screwed on the valve body, a temperature-adjusting nut which is screwed with the valve body is mounted in the temperature-adjusting hand wheel device, a locating nut of a limiting push rod is mounted in the temperature-adjusting nut, a cold water valve seat with a water through hole is screwed in a valve chamber at the front of the locating nut in the valve body, a temperature-sensitive element is mounted between a hot water valve seat and a cold water valve seat in the valve body, a cone hot water valve clack is arranged at one end of the temperature-sensitive element contacting with hot water, wherein the outside of the temperature-sensitive element is sleeved with a return spring, a cone cold water valve clack is arranged at one end contacting with cold water, a push rod with the diameter smaller than that of the water through hole on the cold water seat is mounted at one end of the temperature-sensitive element, and the push rod penetrates through the cone cold water valve clack.

The invention provides a water extractor for an umbrella. A water extraction bucket is arranged in a shell of the water extractor, and a screw shaft rod is arranged on the middle part of the water extraction bucket, wherein a screw sleeve sleeves the screw shaft rod, and is provided with a pedal on one side of the shell through a rocker which is provided with a resetting tension spring; a drain pipe with a water storage box is arranged in a side corner of an inner tank body sleeving the water extraction bucket. When the water extractor is used, a used umbrella with water can be placed in the water extraction bucket, the pedal is treaded to extract the water in a spinning way through the water extraction bucket, and the extracted water can flow into the water storage box for unified treatment; the water extractor can be placed in an office or a home for later use.

The invention discloses a water-saving valve core of a faucet valve water economizer; the water-saving valve core can be used for linearly adjusting and cutting off, is most water-saving when being used for saving water and is largest in flow than any valve when being used for taking water. The water-saving valve core of the faucet valve water economizer is formed by a movable upper shunting piece and a movable lower shunting piece; the shunting pieces can be sleeved with and connected with selectable accessories in a matching mode; the selectable accessories can be a throttling sprayer or normal energy-saving members or special parts such as a bubbler. The water-saving valve core is simple in structure, scientific, reasonable, easy to manufacture, convenient to mount and use and multifunctional, and can be connected with multiple faucet valves and accessories in the matching mode. The water-saving valve core can be matched with a shell to mark, adjust, lock and control the flow and prevents improper water using, the preset functions and water outlet mode of the water-saving valve core can be limited to prevent a user from randomly changing the functions and purposes of the faucet valve, the water waste phenomenon is reduced, water is greatly saved, and the water-saving valve core is multifunctional and good in adaptivity and can be in a house and fields such as industry, agriculture and public occasions.

The invention relates to the technical field of circuit equipment, particularly an electronic circuit board mounting and fixing apparatus. The electronic circuit board mounting and fixing apparatus comprises a left fixed board, a right fixed board and a circuit board; a fixed base groove is formed in the top end side edge of the left fixed board; a fixed base is arranged in the fixed base groove;the center of the right end of the fixed base is fixedly connected with a sliding rod; the right end of the sliding rod passes through the left fixed board to be fixedly connected with the right fixedboard; a horizontal first sliding groove is formed in the top end side edge of the right fixed board; a rubber base is arranged at the bottom end of the first sliding groove; the right end of the sliding rod is fixedly connected with a piston head and glidingly connected with the first sliding groove; the left side, on the outer side of the sliding rod, of the piston head is sleeved with a compression spring; the other side of the top end of the left fixed board is fixedly connected with a hook; the other side of the top end of the right fixed board is rotationally connected with a rotary shaft; and the right end of the rotary shaft is fixedly connected with a spanner. The electronic circuit board mounting and fixing apparatus has the advantages of simple mounting and fixing, conveniencein detachment, and wide market demand and is worthy of popularization.

The invention discloses a household cockroach trapping tool, which comprises a cylinder body, a funnel cover and a bottom cover; Plastic film bag; the inside of the bottom cover is provided with a cavity for containing syrup and a connecting pipe leading the syrup to the funnel cover; the inside of the funnel cover has a cavity structure that can hold washing powder, and the lower part of the funnel cover is provided with a connecting cavity and Cylinder material valve. Its advantages are: scientific and simple structure, compact structure, easy manufacture, reduced volume, and convenient use; the combination of bait and funnel mouth can achieve the effect that cockroaches can only go out from the entrance, and then utilize the habit of living in groups, inside the cylinder There are more and more cockroaches gathered, and bait is used to poison the cockroaches, so as to achieve the purpose of gathering and destroying them, effectively preventing the resurrection of cockroaches, and also preventing the spread of cockroach corpses everywhere, avoiding pollution of the environment. The transparent plastic film bag can be reused, energy saving and environmental protection.

The invention provides a grenade launcher ammunition feed mechanism. The main body of the ammunition feed mechanism is a cartridge receiver, an ammunition bin provided with a pushing spring at the front end is connected with the front end of the cartridge receiver, a launching pipe can slide front and back under the ammunition bin, a sliding seat is mounted in the cartridge receiver and can slide up and down in the cartridge receiver, one side of the sliding seat is connected with a lever moving mechanism, a downward-pulling touch rod is arranged at the front end of a lever, a upward-pushing oblique support rod is arranged at the rear end of the lever, and an idler wheel on the rear upper portion of the launching pipe is located between the downward-pulling touch rod and the upward-pushing oblique support rod. Multiple grenades can be mounted in the ammunition bin in one time, due to the fact that the launching pipe is in the front-back sliding structure, the idler wheel can drive the lever to pull the sliding seat to pull the grenades downwards by pushing the launching pipe forwards, and then the grenades enter an ammunition chamber behind the launching pipe; and due to the fact that the multiple grenades are arranged in the ammunition bin in one time, after each time of percussion, the launching pipe is pushed forwards again, the next grenade is enabled to enter the ammunition chamber, and therefore automatic ammunition feed of the grenades is achieved.

The invention relates to a solar battery device, and discloses an air-cooled double-sided power generation solar battery assembly. The air-cooled double-sided power generation solar battery assembly comprises an assembly shell and battery panels, wherein one side of the assembly shell is provided with a plurality of battery panels which are fixedly arranged, the other opposite side is provided with a plurality of reflecting plates; and the assembly shell is provided with an air inlet and an air outlet. The reflecting plates are used for reflecting sunlight, the light is reflected to the reverse sides of the battery panels, two sides of the battery panels are enabled to receive illumination simultaneously, and the photoelectric conversion efficiency is improved. In addition, the assembly shell is provided with the air inlet and the air outlet, thereby being applied to ventilation and heat dissipation of the battery panels, and preventing the temperature of the battery panels from being too high to result in reduction of the battery efficiency.

The invention relates to a steel ball size automatic sorting device and belongs to the technical field of device equipment. The steel ball size automatic sorting device comprises a guiding rod, a bottom framework, an inclined framework, a feeding support and a flat laying material box. In the using process of the steel ball size automatic sorting device, to-be-sorted steel balls are placed into afeeding bin, and the steel balls enter the flat laying material box under gravity driving; a flat laying roller is used for laying the to-be-sorted steel balls into one layer and rolling forwards thesteel balls; a large steel ball preventing mechanism is used for filtering out and separating large-diameter steel balls; the steel balls small in diameter fall off from the position between a steel ball movable guide rail and a steel ball fixed guide rail and enter a small steel ball receiving bin; and a steel ball preventing plate can be used for controlling the speed of the steel balls enteringa discharging port and qualified in sorting. The steel ball size automatic sorting device is simple and scientific in structure, capable of performing sorting on the steel balls according to the size, relieving the labor intensity of workers and improving the steel ball sorting efficiency and suitable for using and popularizing.

The invention discloses a powder metallurgy sintering furnace having high practicability. The powder metallurgy sintering furnace includes a furnace body; a bottom seat is fixed on the bottom of the furnace body; a door is movably hinged to one side of the furnace body; an observation window is arranged on the door; heating tubes which are evenly distributed are arranged on a top wall of an inner cavity of the furnace body; sintering holders are distributed at equal intervals and are arranged in inner walls of the furnace body; sintering frames are arranged on the sintering holders; sintering nets are arranged inside the sintering frames; an exhaust pipe and a cooling liquid tank are arranged on the top of the furnace body; and a cleaner is arranged on the exhaust pipe. The powder metallurgy sintering furnace can sinter lots of metal powder once, can improve the sintering efficiency, is excellent in warming effect, can avoid energy loss in a sintering process, and can save resources; the cleaner arranged on the exhaust pipe can effectively clean smoke generated in sintering, and pollution to environment due to direct emission of unprocessed smoke can be avoided.

The invention relates to a solar battery device, and discloses a double-sided power generation solar battery assembly with a polygonal structure. The double-sided power generation solar battery assembly with the polygonal structure comprises an assembly frame, a glass plate and battery pieces arranged on the glass plate, wherein the battery pieces are arranged at the inner side of the glass plate, the height of the battery piece is less than the length of the glass plate, a light source irradiates the obverse side of the battery piece from the glass plate, and the obverse side of the battery piece faces to a reflecting plate; and the battery piece is a double-sided battery piece, two ends of the reflecting plate are connected with the glass plate, and a side tangential surface of the reflecting plate is enabled to be of a polygonal structure. According to the invention, two sides of a monocrystalline silicon plate are enabled to receive illumination through the reasonably designed solar battery assembly structure, thereby improving the utilization efficiency of light energy and the power generation efficiency of monocrystalline silicon batteries. Compared with solar battery pieces with the same generating capacity in the prior art, the double-sided power generation solar battery assembly with the polygonal structure is more compact in size, simple and scientific in structure and high in photoelectric conversion efficiency.

Disclosed is a ball float type liquidometer with moving indicator, comprising a ball float chamber and a ferromagnetic spherical ball float provided therein, a moving indicator outside the ball float chamber, a calibrated scale and a moving indicator guide rail, wherein the moving indicator comprises a magnetic steel member, a frame and a rolling system which is horizontally fixed and sheathed in the frame; the rolling system comprises rolling wheels provided with radial grooves along a circumferential surface, rolling bearings and shafts; the magnetic steel member is located between the ball float chamber and the frame and is fixed outside one side face close to the ball float chamber on the frame, and a magnetic pole of the magnetic steel member is directly oriented towards the ball float.

The invention relates to a safe device for relieving constipation. The device comprises a frame composed of a fixed mount plate with a shaft load hole and a mount hole thereon, a pulling arm with a shaft load hole, an assembly hole and a fixed mount hole thereon, a bent support rod with an assembly hole thereon, and an intermediate connecting arm positioned between the pulling arm and the support rod; and a tension member composed of a tension ring assembly and a handle. The tension ring assembly comprises a joint mount seat, a tension spring, a transition joint ring, a cord belt and a hoisting ring. The fixed mount plate is fixedly arranged on the wall behind the toilet and is connected with the pulling arm in a shaft-mounted manner. The tension ring assembly and the handle are selectively arranged on one side below or above the front end of the pulling arm according to the actual demand. By holding the hoisting ring by both hands or holding the handle by both hands, the user can pull or stretch the body upwards to unfold the abdomen, and then hold his breath and exert a force downwards to evacuate the blocked stools. The device facilitates the evacuation in the constipated patients with safety and relaxation, prevents various accidents from happening, and has good practicability and market prospect.

The invention discloses an H-shaped steel worm and worm gear linkage clamping device and belongs to the field of machine manufacturing tools. The clamping device is composed of fixed clamping roll shafts and a movable clamping roll shaft mechanism. The movable clamping roll shaft mechanism is composed of power drive devices, linkage clamping roll shafts and sliding rails. The linkage clamping roll shafts are formed by integrally connecting roll shaft bodies with a connecting rod. All the roll shaft bodies of the linkage clamping roll shafts are connected with the sliding rails in a one-to-one correspondence and sliding fit mode and are opposite to the fixed clamping roll shafts and arranged on the other side of a roll bed rack. Telescopic arm ends of the two drive devices are symmetrically and perpendicularly connected with the connecting rod of the linkage clamping roll shafts. The linkage clamping roll shafts are driven by the two drive devices to slide along the sliding rails relative to the fixed clamping roll shafts to clamp H-shaped steel on the roll bed rack. According to the clamping device, single-side power drive is adopted to drive the linkage clamping roll shafts to move synchronously so as to achieve linkage clamping of H-shaped steel members, the clamping accuracy and machining quality of the H-shaped steel members at corresponding working positions are guaranteed, and production efficiency is effectively improved.

The invention provides a virtual experiment system and an implement method thereof. The method includes: determining experiment contents and collecting experiment data; compiling the state views and state tables of an experiment process according to the experiment data, and compiling the state transfer tables among the state views according to the state tables; saving the experiment data, the state views and the state transfer tables; compiling and displaying the operation interface of the experiment process; when a user inputs information through the operation interface, searching for the corresponding state views according to the information input by the user and the saved state transfer tables, and displaying the searched state views. By the method, the virtual experiment system can be built successfully.

The invention relates to a device for picking up and putting away a book at a high place. The device comprises a supporting rod, a book-pick-up mechanism, a book-put-away mechanism, a pull wire and ahandle, wherein the book-pick-up mechanism and the book-put-away mechanism are located on the supporting rod, the pull wire is used for controlling motions of picking up and putting away the book, andthe handle controls the pull wire to be tensioned or loosened. The book-pick-up mechanism comprises a book drawing assembly and a book clamping assembly, wherein the book drawing assembly is used fordrawing the book out of a bookshelf, and the book clamping assembly is located below the book drawing assembly and is used for clamping the book drawn out by the book drawing assembly. The book-put-away mechanism comprises a book placing box and a book pushing assembly which is located in the book placing box and is used for pushing the book out of the book placing box. The book placing box, thebook drawing assembly and the book clamping assembly are arranged from top to bottom in sequence. By means of the device for picking up and putting away the book at the high place, the dual purposes of picking up and putting away the book can be achieved simply through one handle and one supporting rod, and the device is small in size, convenient to operate, high in practicability and particularlyapplicable to libraries.

The invention discloses a rotary replaceable dental floss stick, which comprises a handle, a dental floss holder, dental floss and other parts. The handle has a base handle, a rotating handle and a rotating shaft, and the base handle and the rotating handle are connected through the rotating shaft and can rotate relatively. The dental floss holder has a fixed bracket and a rotating bracket, the fixed bracket is fixed on the base handle, and the rotating bracket is fixed on the rotating handle. There are fixers at the ends of the fixed bracket and the rotating bracket, and there may also be a cutter for cutting dental floss. The fixer can adopt Y-shaped clamping seams, the structure is simple and reliable, and it is easy to use and clean. The dental floss can be conveniently fixed on the holder, and can also be easily removed. The cutter can safely and conveniently cut off the remaining part of the dental floss. The rotary replaceable dental floss stick has the characteristics of being able to clean the crevices and sides of the teeth, comfortable and easy to use, simple and scientific in structure, easy to clean, hygienic and safe, multi-functional, antibacterial and antibacterial, and the like.

The invention discloses a pear picking tool, comprising a pear picking tool including a cylinder and a support rod; the cylinder body of the cylinder is a cylindrical grid structure, the top is a grid-like spherical structure, the bottom is a hollow structure, There is an oval fruit inlet at the top, and the bottom area of ​​the cylinder is the bagging part; the outside of the bagging part is covered with a mesh bag, and a tightening rope is worn in the ring of the mesh bag; a threaded rod is connected to the back of the cylinder to support the fruit. The rod is set on the threaded rod; the support rod is composed of a telescopic rod and an aluminum alloy tube; the upper part of the fruit inlet has a fruit picking part with an inverted V-shaped structure, and the edge of the V-shaped side of the fruit picking part is a sharp edge; the aluminum alloy tube has a Colorful bubble generating components. Its advantages are: scientific and simple structure, compact structure, easy manufacture, reduced volume, and convenient use; it is very convenient to carry and store by using a support rod; you can pick fruits by standing under the tree without climbing up the tree, and avoid falling from the tree Risk, people who dare not climb the tree can stand under the tree and use it to pick the fruit without breaking the fruit.

The invention relates to a walking small electric hoister suitable for transferring materials between reverse building method floors. The electric hoister comprises front and back column frames containing bottom interconnecting beams, upper cross beams, left and right bracing stand columns and left and right side and middle assembly nodes, a bottom bracket module containing a counter-force bracketsystem, an anti-tilting truss containing upper and lower frame rods, bracing rods and vertical rods, a crane cross beam consisting of a material extracting section and a suspension section, a counter-force anti-tilting mechanism containing a bracket, disc buckles and upper and lower support legs, and a walking lifting mechanism containing an electric hoister, pulleys and lifting hooks. A hoistermain body is fixedly limited between a floor and a ceiling near a soil taking port with a bottom bracket module as a ground support and with four upper top support plates as top supports; materials can smoothly walk on guide rails as needed, and are quickly, efficiently and safely transferred from top to bottom or from bottom to top; and the electric hoister is simple, reasonable and practical instructure, and solves the difficulty of shortage of proper material hoisting machinery in traditional reverse building method construction.