645results about How to "Control altitude" patented technology

The invention relates to a fracturing fluid for controlling extension of a fracture and a fracturing method. The fracturing fluid is used as sand-carrying fluid. The viscosity of the fracturing fluid is below 10mPa.s. The fluid contains suspended-sand fibers which may be hydrophilic high-strength organic fibers or inorganic fibers, but do not contain cross-linking agent. The suspended-sand fibers in the fracturing fluid form a three-dimensional network structure to suspend a propping agent, and therefore can replace thickening agent to reduce the viscosity of the fracturing fluid. The fracturing method comprises the step of injecting the fracturing fluid carrying the propping agent into a stratum under a condition of low discharge volume so as to effectively control the extension of the fracture. The fracturing fluid and the fracturing method are very suitable for fracture stimulation of a thin bed reservoir and can meet the fracturing requirements of thin bed reservoirs and oil and gas reservoirs with bottom water and inter-stratum oil and gas reservoirs.

The invention discloses a seat cushion adjusting mechanism of an integrated automobile safety seat for children, which comprises a seat cushion height adjusting mechanism and a seat cushion length adjusting mechanism, wherein the seat cushion height adjusting mechanism is installed below the middle seat cushion of the back-row seats, and the middle seat cushion of the back-row seats can be lifted by a driving device and a link mechanism, so that the seat for adults can be changed into a heightened seat for children; and the seat cushion length adjusting mechanism is connected with multiple sections of additional seat cushions which can be connected with or separated from each other at the front side of the seat cushion of the seat, so that the length of the seat cushion can be adjusted according to the body sizes of the children. The invention can realize the stepless adjustment of the seat cushion height based on the height of the children and the multistep adjustment of the seat cushion length, thereby protecting the children from being hurt in the process of automobile collision when being used by matching with the traditional three-point safety belt for adults. Besides, the invention can be adjusted to adapt to adults for use, has the advantages of simple structure, low cost and convenient use, and can realize the intelligent positioning of the children.

The invention discloses a colorful optical filter base plate with fixed spacers and a manufacturing method thereof. The colorful optical filter comprises a transparent substrate, a colorful film layer, a latticed black matrix, a flat layer, a transparent electrode layer and a columnar spacer. Firstly, the well-known colorful optical filter base plate is coated with transparent photosensitive material and then exposed by a mask with preset patterns, after being treated by adopting micro-lithography, the transparent columnar or frustum-shaped spacers are directly formed on the colorful optical filter base plate; the central shafts of the spacers are perpendicular to the surface of the flat layer and corresponding to the intersection of gridlines of the black matrix. Since the spacers are directly formed on the colorful optical filter base plate and the height, distribution and density thereof are all preset and controllable, the liquid crystal thickness (CELL GAP) between LCD base plates can be kept uniform, thus avoiding arranging the spacers within a pixel to affect the porosity of LCD.

The invention discloses a production-increasing method by water-plugging and fracture, comprising the following steps: mixing 5 to 7 proportions of crack shielding agents with 100 proportions of clean water; injecting a mixture a into pressed cracks of a well layer under the temperature of 0 to 45 DEG C; shielding an aperture in a storage layer; mixing 5 to 10 proportions of bottom water oil reservoir plugging agent with 100 proportions of low-viscosity fracturing fluid; injecting the mixture generated in step c into cracks pressed in oil layer or gas layer under the temperature of 0 to 45 DEG C; plugging lower water layer after deposition of the mixture; carrying out sand-adding and fracturing operation on the oil layer or the gas layer at the upper part of the storage layer; closing a well and waiting for condensation then fishing the construction. In the method, the bottom water oil reservoir type or the bottom water gas reservoir type gas well bottom is plugged, the jumping-up of bottom water is prevented, simultaneously the crack height is controlled effectively, the extending-down of the crack is prevented, therefore, the aims of plugging the water layer is achieved and the single-well output of an oil well or a gas well is improved.

The invention relates to a hydraulic automatic leveling system and a hydraulic automatic leveling method for a seabed drilling machine. The leveling system comprises support plates, large arms, chains, hydraulic cylinder legs, a base and a hydraulic system, wherein the base supports the drilling machine, and is connected with the hydraulic cylinder legs; the large arms are connected with the hydraulic cylinder legs, the base and the support plates; and the support plates are in contact with a seabed surface. The leveling method comprises the following steps of: selecting mutually vertical axes X and Y on the base, arranging double-axis tilt sensors along the axis X or Y, measuring inclination angles in two coordinate axis directions by using the double-axis tilt sensors, performing amplification, filtration and isolation by using a signal conditioning module, transmitting conditioned signals to data acquisition equipment and a computer, performing digital-to-analogue conversion and amplification after the signals pass through a signal analysis module, and outputting three paths of current to drive the motions of valve elements of three proportional reversing valves, control the flow of the system and drive the three hydraulic cylinder legs to ascend by y1, y2 and y3 to realize leveling. The system and the method are applied to kinds of offshore drilling equipment, and are highin leveling speed and accuracy.

The invention discloses an automatic library book returning robot and a book returning system thereof, and belongs to the technical field of robots. The automatic library book returning robot comprises a moving assembly capable of driving the robot to move as a whole. A book loading assembly is arranged at one end of the moving assembly, a lifting assembly is arranged above the moving assembly, a book putting-in-rack assembly is installed on the lifting assembly, and the lifting assembly can drive the book putting-in-rack assembly to move vertically. The book putting-in-rack assembly comprises a lifting table, a book bottom plate and a first book pushing plate capable of sliding vertically on the book bottom plate are arranged on the lifting table, a book pushing device is arranged on the first book pushing plate, a book dividing device is further arranged on one side of the lifting table and can move along the side edge of the lifting table, and a code scanner is further installed on the book dividing device. The book returning robot is reasonable in structural design, easy to operate, capable of automatically rerunning books without manual intervention, high in efficiency and capable of reducing labor cost, emancipating productivity and reducing the operating cost of a library.

The invention discloses a fin field effect transistor (FinFET) and a manufacturing method thereof. The manufacturing method of the FinFET includes the following steps that: a first semiconductor layer is formed on a semiconductor substrate; a second semiconductor layer is formed on the first semiconductor layer; a top protection layer is formed on the second semiconductor layer; the second semiconductor layer is patterned, such that a semiconductor fin can be formed; a sidewall protection layer is formed on a side surface of the semiconductor fin; the first semiconductor layer is doped, such that a doped punch-through-stopper layer can be formed; the top protection layer and the sidewall protection layer are removed; a gate stack that spans the semiconductor fin is formed, and the gate stack includes a gate dielectric and a gate conductor, and the gate conductor and the semiconductor fin are separated from each other by the gate dielectric; a gate sidewall surrounding the gate conductor is formed; and a source region and a drain region are formed in portions of the semiconductor fin which are located at two sides of the gate stack. The semiconductor fin is separated from the semiconductor substrate through the doped punch-through-stopper layer, and therefore, the height of the semiconductor fin can be controlled with easiness, and a leakage current path which is located between the source region and the drain region and passes through the semiconductor substrate can be disconnected.

The invention relates to low pressure casting technology, especially relates to a suspending pressing device of low pressure casting machine. The method is: a. affirms the initial value; confirms the pressure P correspondent to the height h0 of suspending level; b. storing: the P is stored in programmable logic controller as the base value; c. sets the compensating value: works out the pressure compensating coefficient delta H between the two times of pours, then works out the pressure compensating quantity delta P, and memorizes the value; d. carries on unloading control: after unloading, the pressure in pot is equal to sum of the initial P and the nth compensating quantity delta P. the invention can reduces cost, and upgrades the producing efficiency.

The invention provides a combined type ocean power generation device. The combined type ocean power generation device comprises a base and a main body, wherein the main body is fixedly connected with the base; an upper cavity is arranged in the upper end of the main body; a lower cavity is arranged in the lower end of the main body; a sealing plate is arranged at the upper end of the upper cavity and rotationally connected with a rotary shaft; the rotary shaft is horizontally arranged, one end of the rotary shaft is fixedly connected with vanes, and the rotary shaft is connected with an input shaft of a generator through a speed reducer; a generator II is arranged in the upper cavity, a transmission structure capable of driving an input shaft of the generator II to rotate when the rotary shaft rotates is arranged between the input shaft of the generator II and the rotary shaft; a through hole is horizontally formed in the lateral wall of the lower end of the lower cavity, and a generator III is arranged in the through hole; a swinging generator is arranged at the outer end of the through hole; a ventilation hole is formed in the lateral wall of the main body and fixedly connected with a valve capable of controlling the ventilation hole to open and close; a plurality of base protecting devices are further arranged on the base. According to the combined type ocean power generation device, scouring of ocean currents to the base can be reduced, and wind energy and tidal energy are fully used for power generation.

The invention discloses a method for burying a drainage-seepage body of a reverse filtering pipe in a tailing dam. The method comprises the steps that buried water guide pipes are implanted to a tailing dam body from top to bottom; water collecting pipe grooves are formed in the tailing dam body parallel to a fill dam in an excavating mode and water collecting pipes are buried in the water collecting pipe grooves in a sectionalized mode; drainage-seepage pipe grooves are excavated along the natural gradient of a dry beach of a tailing pond and water seepage pipes are placed inside the drainage-seepage pipe grooves; the water seepage pipes are connected with the water collecting pipes and the water guide pipes are connected with the water collecting pipes. According to the method, the burying mode of the reverse drainage-seepage body in the dam is adopted, the height of a pre-seepage line of tailings is effectively controlled, the seepage line is prevented from rising, the stability of the dam body is guaranteed, the maintenance cost is lowered, and a large amount of later treatment cost is saved for enterprises. Meanwhile, the drainage-seepage structure is reasonable, the technology is simple, construction is convenient, the construction period is short, the cost is low, the drainage-seepage effect is good, and therefore the potential safety hazards that the tailing dam is in danger, collapses, breaks and the like are eliminated.

Provided are a transistor formation method and a CMOS formation method. The transistor formation method comprises: providing a semiconductor substrate which is formed with a gate dielectric layer, a gate electrode layer and a hard mask layer on the surface in sequence, wherein the two sides of the gate dielectric layer, the gate electrode layer and the hard mask layer are formed with first side walls and pseudo side walls in sequence; forming stress liner layers in the semiconductor substrate which is closely next to the two sides of the pseudo side walls; removing the pseudo side walls after the stress liner layers are formed and then forming second side walls on the outside surfaces of the first side walls; performing ion implantation on the stress liner layers after the second side walls are formed and then forming self-aligned silicide layers in the stress liner layers, wherein the surfaces of the self-aligned silicide layers are flush with the surfaces of the stress liner layers; and removing the hard mask layer after the self-aligned silicide layers are formed. With the transistor formation method, mobility of carriers in channel region is enhanced and performance of the transistor is improved.

The invention relates to a cutting off device, in particular to a fast cutting off device for hardware parts. The invention solves the technical problem of providing a cutting device for a covering steel plate for production of a circuit board, which is light and handy, fast in cutting off and good in cutting off effect. In order to solve the technical problem above, the invention provides such a fast cutting off device for hardware parts, which comprises a bottom plate, first guide rods, first guide covers, a moving rod, a lifting device, a top plate, a moving device, a lifting rod, a mounting rod, a second motor, a blade, first supports, and the like; the first guide rods are symmetrically welded on the left side and the right side of the top of the bottom plate, the top plate is welded on the top ends of the two first guide rods, the middle of the bottom of the top plate is provided with the lifting device, and the bottom of the lifting device is connected to the lifting rod. By controlling the lifting device to move up and down, the blade is controlled in an optimal position, such that the cutting off effect is better, and by driving the blade to move left and right through the moving device, the cutting off is more thorough.

The invention discloses a multi-pylon multi-span lifting cable crane. The crane comprises M pylons, N lifting spans connected to the M pylons sequentially, bearing cables, an overhead crane and lifting appliance assembly, traction systems, lifting systems and anchorage systems, wherein each pylon comprises a cable tower and a main tower arranged at the top of the cable tower, and a cable saddle structure for supporting the corresponding bearing cable is arranged at the top of the main tower; two ends of single bearing cable are used for being connected with the anchorage systems located on both banks; one lifting span is formed between every two adjacent pylons, and at least two lifting spans are connected to form a multi-pylon multi-span structure; the traction systems are used for pulling the single overhead crane and lifting appliance assembly to move between the adjacent lifting spans, and the lifting systems are used for lifting materials through the overhead crane and lifting appliance assembly; N and M are both natural numbers, M is larger than or equal to 3, and N is equal to the difference between M and 1. Therefore, multiple lifting spans are formed by arranging multiple pylons, and compared with the conventional double-pylon single-span lifting cable crane, the height of each pylon is reduced substantially and controlled effectively.

An efficient wall drilling machine comprises a base, a first cylinder is arranged on the base, and a piston rod of the first air cylinder is fixedly connected to the lower side of a rotating device; fixing frames are arranged on the two sides of the rotating device, and a telescopic scale rod is fixedly connected between each fixing frame and the base; the upper end of the rotating device is connected with a fixing base, and a sliding groove is formed in the horizontal direction of the fixing base; a drilling device is slidably connected with the interior of the sliding groove, and a damping device is connected to the vertical direction of the fixing base; the damping device is connected with a second cylinder, and a piston rod of the second cylinder is connected with the drilling device;a hollow connecting pipe is fixedly connected to the upper end of the fixing base, and a scale rod is inserted into the front end of the connecting pipe; the scale rod is fixed into the connecting pipe through a locking bolt, and a vacuum suction cup is arranged at the front end of the scale rod. The drilling machine is reasonable in design, the working efficiency can be effectively improved, thedrilling positioning precision and quality are improved, and the flexibility and the safety are achieved.

The invention provides a non-core layer package substrate and a manufacturing method thereof. The non-core layer package substrate comprises a substrate body and a plurality of electrical contact lugs, wherein the substrate body is composed of an auxiliary dielectric layer, a lining circuit and a layer-adding structure; the auxiliary dielectric layer is provided with a first surface and a second surface which are opposite to each other; the lining circuit is arranged on the second surface; the layer-adding structure is arranged on the second surface and the lining circuit; each electrical contact lug is composed of a metal post and a solder layer; the metal post is provided with a first end and a second end which are opposite to each other; the solder layer is arranged on the first end; the second end of the metal post is arranged in the auxiliary dielectric layer and electrically connected with the lining circuit; and the first end of the metal post and the solder layer protrude on the first surface of the auxiliary dielectric layer, thus obtaining electrical contact lugs with superfine pitch and even height. By forming small-bore open pores which pass through the auxiliary dielectric layer and a first barrier layer, the non-core layer package substrate can effectively control the average value and allowance of volume and height of the electrical contact lugs formed in open pores, thereby obtaining the lugs with superfine pitch.

The invention relates to a surface mounted device (SMD) type light emitting diode (LED) device for an outdoor display screen, which comprises at least one LED chip, a lower substrate for loading the LED chips, an upper substrate combined with the lower substrate and packaging colloid arranged on the upper substrate, wherein the upper substrate is provided with steps; and the packaging colloid comprises a packaging matrix covering the steps and an optical lens arranged on the packaging matrix. In the SMD type LED device, the stepped upper substrate is combined with the packaging matrix with a certain height to reduce the size of the packaging colloid and optical loss, improve the light extraction efficiency and simplify the structure; moreover, light distribution with a wide viewing angle can be provided and the defects of a through-hole LED and a Top LED can be made up by arranging a stepped structure on the upper substrate and coving the packing colloid with a lens structure. Besides, the invention also provides a display module using the SMD type LED device for the outdoor display screen.

The invention discloses a fertilizing, sowing and weeding device of a tillage machine. The fertilizing, sowing and weeding device comprises a rotary cultivator, a stand, a fertilizer applicator, a seeder, a transmission gear set, a transmission shaft, a bearing sleeve, a power wheel, a connecting rod, a movable rod, a spring, a fixed piece, a medicine liquid tank, a water pump, a water pipe, a spray head and a ridge-former, wherein the stand is fixedly connected on the rotary cultivator by screws; a metal ring is welded at one end of the connecting rod and sleeves on the bearing sleeve, and the powder wheel is arranged at the other end of the connecting rod; the power wheel is connected with the transmission shaft by a chain; the fixed piece is welded in the middle of the stand, and a circular hole is formed in the middle of the fixed piece; the lower end of the movable rod is connected with the connecting rod by a pin shaft, and the upper end of the movable rod passes through the circular hole of the fixed piece; the spring sleeves on the movable rod, and the upper end and lower end of the spring respectively lean against the fixed piece and the connecting rod. The fertilizing, sowing and weeding device has the advantages of being simple in structure, high in practicality, and the like.

The invention discloses a method for testing laser metal direct forming based on self-healing mechanism, which is to carry out laser single-path metal forming tests under the conditions of different powder defocusing amounts respectively by adopting the same basic process parameter so as to obtain a variation law of the section thickness of single-path metal forming under the conditions of different powder defocusing amounts. The self-healing mechanism existing under the condition of powder negative defocusing by analyzing the law, can automatically eliminate a phenomenon of a rough forming surface caused by unstable process in a forming process along with performance of forming, thereby ensuring stable performance of the forming process. By applying the self-healing effect generated by powder negative defocusing, high-quality deposition forming of a complicated thin-walled component can be realized under an open-loop control system.

The invention discloses a grinding machine of special pipes. A grinding trolley comprises a frame, a second drive device driving the frame to move on a guide rail, a grinding belt, a grinding wheel, a wheel carrier, a grinding spindle and a third drive device driving the grinding spindle to rotate. The grinding spindle is disposed on the frame. The wheel carrier is rotatably disposed on the grinding spindle. The grinding wheel is disposed on the wheel carrier. A driving wheel is disposed on the grinding spindle. The grinding belt wraps the grinding wheel and the driving wheel. The wheel carrier is coned with a fourth drive device which drives the wheel carrier to rotate up and down around the grinding spindle. One side of the grinding wheel is provided with a sensor which detects surface height of a special pipe. The sensor and the fourth drive device are connected with a PLC (programmable logic controller). The grinding machine of special pipes has the advantages the grinding wheel can rotate up and down around the grinding spindle, the height of an operating part of the grinding belt can be adjusted, and the height of the operating part of the grinding belt can change with the surface height of the special shape accordingly.

The invention discloses a fertilizing and pesticide spraying device for vegetable planting. The device comprises a base, a stirring motor is mounted in the base, a limit mounting groove is mounted atthe upper end of the base, a water tank is mounted in the limit mounting groove, an revolving shaft is mounted in the water tank, the lower end of the revolving shaft penetrates through the bottom ofthe water tank and the limit mounting groove to be rotationally connected with an output shaft of the stirring motor, a tank cover is mounted at the top end of the water tank, a waterproof tank is mounted on one side of the limit mounting groove, a water pump is mounted at the upper end of the waterproof tank, a rotating platform is mounted on one side of the water pump, a rotating motor is mounted in the waterproof tank, an output shaft of the rotating motor penetrates through the top of the waterproof tank to be rotationally connected with the rotating platform, a telescopic rod is mounted on the rotating platform, and a sprayer is mounted at the upper end of the telescopic rod. The seeder solves the problems of high labor intensity, inconvenience in operation, uneven spraying and low spraying efficiency of existing spraying devices.

The invention relates to a bridge settlement support, which comprises a product support, further comprises an upper settlement compression device which is located on the bottom portion of the product support, the device comprises an upper settlement body and a lower bottom basin, the upper settlement body comprises a top plate, an inner support plate and a middle carrier plate, the top plate is located at the lever direction, the middle carrier plate is fixed on the lower portion of the top plate and is parallel to the top plate through the inner support plate, the middle carrier plate is equipped with a plurality of rheological channels, the inner support plate comprises a ring plate and a baffle which is fixed in the ring plate to form a plurality of cavities, and the upper portion of the ring plate is equipped with a plurality of vent holes. The lower bottom basin comprises a bottom plate and an outer support plate which is fixed on the upper portion of the bottom plate, an overflow orifice is arranged between the bottom plate and the outer support plate, the outer support plate is a ring cylinder which is tightly sleeved on the outer side of the inner support plate, an electric heating disk is laid on the bottom plate, and a compression body is filled between the electric heating disk and the middle carrier plate. The bridge settlement support has the beneficial effects that the disease of bumping at bridge-head is effectively eliminated through that the self settlement drives the floor elevation reduce.

The invention relates to a two dimension electro-optical switch array device based on a microfluidic technology, adopting a structure of an air storage layer plus a waveguide layer plus a fluid storage layer, wherein, the waveguide layer comprises a flat basement (7), a waveguide structure (8) which is arranged in a matrix form is arranged on the basement, a fluid cavity (9) is arranged at a waveguide cross node, the edge of the basement is provided with an air-fluid connecting channel (10),and an electronic control optical switch unit array (11) is arranged at the fluid cavity (9) at the waveguide cross node; the air storage layer is a sealing container (1) which stores the air, the edge of the container is provided with an air pressure adjusting control hole (4), an air-fluid connecting open hole (5) at the bottom part penetrates the waveguide layer and is communicated with the fluid storage layer, an electrode open hole (6) which is consistent with the waveguide cross node is arranged on the container, thereby being convenient to show an optical switch control unit electrode (18); the fluid storage layer is a container which is open ended at the upper end and stores the fluid, the fluid storage layer is sealed through combining the waveguide layer, the microcontainer inner surface tension is changed through an electro wetting effect to adjust the height of a liquid column, thereby realizing total reflection and total transmission of a light beam and further realizing the opening and closing actions of the light.

The invention provides a continuous casting device and a continuous casting method, which are capable of stably conducting continuous casting of magnesium alloys. The continuous casting device comprises a holding furnace used for holding molten metal of magnesium or magnesium alloys; a leaking groove used for internally storing up the molten metal supplied from the holding furnace and supplying the stored molten metal continuously to a casting mould used for continuous casting; a molten metal supplying pipe arranged between the holding furnace and the leaking groove and used for supplying the molten metal to the leaking groove; a heating device used for heating the leaking groove; the casting mould used for continuous casting, which is connected with the leaking groove; and a drawing device used for drawing the castings delivered from the casting mould used for continuous casting by a conveying roller.

The invention discloses an intelligent spraying machine capable of adjusting a spraying range. The intelligent spraying machine comprises a machine base, a dust absorbing cover, a first air-drying device and a second troweling roller, wherein the upper end of the machine base is equipped with a stirring box; a measuring barrel is arranged on the stirring box; an electric motor is arranged on the inner bottom of the stirring box; a chain transmission device is connected to a stirring rod; upper and lower ends of a connecting tube are correspondingly equipped with a first material conveying tubeand a second material conveying tube; the dust absorbing cover is arranged at the outer side of a spray gun; both a first dust absorbing tube and a second dust absorbing tube are connected to an aspirated engine; the left side of the aspirated engine is connected to a dust collecting box; and the second air-drying device is arranged on the bottom of the machine base. According to the intelligentspraying machine capable of adjusting the spraying range disclosed by the invention, a protective cover and the spray gun are in threaded connection, so that the spray gun can be dismounted by rotating the protective cover; and protective covers of different models and sizes can be replaced according to dimension requirements of different product spraying positions, so that the problem that the spraying range is not easily controlled can be avoided through the protective cover.

The invention discloses an indoor test device for measuring permeability coefficient of tunnel lining and soil pore pressure response under fluctuating water level. The indoor test device comprises ameasurement module for stable and fluctuating water level and a measurement module for permeability coefficient of lining. The measurement module for stable and fluctuating water level comprises a Mariotte flash and a micro-lifting platform. The Mariotte flash is connected to the upper end of a soil column bucket via a hose. The interior of the soil column bucket is provided with water body, soilsample, a filter paper, a porous filter plate, and gravel from top to bottom to simulate the occurrence environment of the underwater shield tunnel. The side wall of the soil column bucket is providedwith a plurality of pressure measuring holes. The pressure measuring holes are connected to pressure measuring tubes through hoses to measure the water pressure of the water body before and after flowing through the soil sample and outside the lining. The outlet below the soil column bucket is connected to the constant water level bucket through a conversion joint to form a measurement module forpermeability coefficient of lining. The measurement module realize that the measurement of the vertical permeability coefficient of the soil sample, and the equivalent permeability coefficient of conversion joint with different pore sizes relative to soil sample. The indoor test device has the advantages of simple operation, various functions, high test precision, and small measurement error.

The invention relates to an efficient mixing device and especially relates to the efficient mixing device for a water-based cleaning agent for an electronic product. The technical problem to be solved by the invention is to provide the high-efficiency, thorough-mixing, time-saving and labor-saving efficient mixing device for the water-based cleaning agent for the electronic product. The device comprises a base plate, a right frame, a top plate, a lifting device, a stirring device, a mounting frame, a first slide rail, a first slide block, a stirring frame, a discharging pipe and an electric control valve, wherein the right frame is welded on the right side of the top of the base plate; the top plate is welded at the top end of the right frame; the lifting device is arranged on the left side of the bottom of the top plate; the stirring device is arranged at the bottom of the lifting device; a moving device is arranged in the middle of the left side of the right frame. According to the invention, the height of the stirring device is controlled by the lifting device, so that the worker can more conveniently add the water-based cleaning agent material. The stirring device and the moving device cooperate with each other.

The invention discloses an auxiliary teaching device for teaching. The auxiliary teaching device comprises a storage box and a concave base. A fixed mounting board, a writing board and a projection display screen are arranged inside the storage box; and a support bottom plate is fixedly connected to the lower end surface of the fixed mounting board. Guide rods are connected to the support bottom plate in a sliding manner by L-shaped connecting plates; the L-shaped connecting plates are fixedly connected with elastic pulling ropes; the elastic pulling ropes wind and connect upper guide wheels and lower guide wheels in a rolling manner successively; the elastic pulling ropes arranged symmetrically left and right wind a winding wheel III and a winding wheel I respectively and fixedly; a rotating shaft III and a rotating shaft I are fixedly installed at the winding wheel III and the winding wheel I respectively and fixedly; and the rotating shaft III and the rotating shaft I are connectedwith a driving shaft in a meshing driving manner by gear wheels and the driving shaft is fixedly connected with the output terminal of a driving motor. The lower end of the storage box is installed inan upper circular opening of the concave base; and universal wheels are fixedly installed under the lower end surface of the concave base. The auxiliary teaching device has advantages of great convenience of movement and fixation, high stability and good anti-knock performance; and the efficiency of existing-teaching-mode teaching and learning of the students and teachers is improved.

The invention provides a sand wind two-phase flow experiment device for buildings and building wind sand experiments. The sand wind two-phase flow experiment device comprises a direct-flow type atmospheric boundary layer wind tunnel (1), a sand grain recovery tank (8), a wind sand flow funnel tank (9) and a wind sand flow sand-supply bed surface (16). The direct-flow type atmospheric boundary layer wind tunnel (1) is composed of a fan section (2), a stabilizing section (3), a honeycomb and damping net (4), a contraction section (5), an experimental section (6) and a diffusion section (7). The sand grain recovery tank (8) is installed on the outlet ground adjacent to the direct-flow type atmospheric boundary layer wind tunnel (1). The wind sand flow funnel tank (9) is installed at the wind tunnel outer top of the front end of the experimental section (6). The wind sand flow sand-supply bed surface (16) is formed by splicing a plurality of sand supply grooves with the same size into one, and installed in the experimental section (6). The wind sand flow funnel tank (9) and the wind sand flow sand-supply bed surface (16) are adjusted, and therefore the two-phase flow boundary condition of wind sand obtained by blowing falling sand and bed surface sand through wind can be suitable for the buildings and the building wind sand experiments.

The invention discloses a reservoir bank water level change and slope angle variable landslide model test device and method under an earthquake and rainfall coupling effect, and belongs to the field of slope engineering landslide disaster tests. The device comprises a model box, a rainfall system, an electric lifting system and a deformation monitoring system. The model box comprises a bottom plate, front, back, left and right side plates and an internal permeable plate. The rainfall system comprises a water storage tank, a water pump, a water supply main pipe, an electronic control main valve, a flowmeter, a nozzle, a rainfall system bracket and a jack. The electric lifting system comprises a servo motor, a bearing and a belt. The deformation monitoring system comprises a three-dimensional laser scanner. The method comprises: jacking the rainfall system support to a proper height, filling the model box with soil, then lifting the model box to a designated angle, simulating the rainfall working condition, starting the vibration table, and monitoring slope deformation through the three-dimensional laser scanner in the testing process. Simulation of various rainfall working conditions is achieved, the landslide model is adjusted at any angle, and landslide tests with different inclination angles are achieved.