52results about How to "Large adjustable range" patented technology

The invention relates to a shale gas development oil-base drilling fluid mud cake cleaning solution and belongs to the technical field of petroleum drilling engineering chemical agents. The shale gas development oil-base drilling fluid mud cake cleaning solution is characterized by comprising the following components in percentage by weight: 10 percent to 30 percent of a cleaning agent, 0 percent to 60 percent of a weighting agent and the balance of water, wherein the cleaning agent consists of nonionic surfactants and mutual solvents; the weight ratio of the nonionic surfactants to the mutual solvents is 1:9 to 9:1; the nonionic surfactants are polyoxyethylene ether, polyoxyethylene aliphatic ester, polypropylene oxide aliphatic ester and the like; the mutual solvents are methyl alcohol, ethanol, isopropanol and the like; the weighting agent is superfine iron ore powder and has density of 4.90 to 5.20 g / cm<3>. The cleaning solution disclosed by the invention has low viscosity, can form turbulence displacement, can effectively clear away oil-base slurry and mud cakes attached on a well wall and change the water wetting condition of the well wall, and has the characteristics that the density adjustable range is wide, the cleaning effect is good, and the shale gas development oil-base drilling fluid mud cake cleaning solution is beneficial to improving well cementing quality.

The invention belongs to the field of agricultural machinery, and particularly relates to an automatic lifting drive axle. The drive axle comprises a transmission device and a lifting device, wherein the transmission device transfers power to wheels of a vehicle, and drives the vehicle to run, and the lifting device controls the ground height of an axle body, so as to continuously control the ground clearance height of the drive axle of the vehicle. The drive axle can adjust a ground clearance according to operating conditions and different crop growth periods, and is large and continuous in adjustable range, and convenient and reliable in adjustment. Furthermore, the drive axle is compact in structure, large in transmission ratio and large in torque; an application range of an agricultural machine is widened; and a use ratio of the agricultural machine is increased.

A semi-active type vehicle seat vibration absorbing device with a magneto-rheological elastomer comprises a lower excitation coil, a working barrel, a magneto-rheological elastomer, an upper excitation coil, a spiral spring, a protection cover, a seal ring, an upper support, a piston rod, a piston, an adjusting shim, a gland nut, an upper excitation core, a lower excitation core, control wires, a controller, a signal wire, a vehicle height sensor, a magnetism isolating bottom plate and a lower support, wherein the excitation coils and the excitation cores which are used as the loading sources of an electromagnetic field are mounted in the working barrel, and the magneto-rheological elastomer is positioned between the upper excitation core and the lower excitation core; the vibrating signal of the vehicle body is transmitted to the controller by the vehicle height sensor; the size of current in the excitation coils can be changed by the controller through the control wires, and magnetic field strengths in the excitation coils and the excitation core are changed as a result, so that the rigidity and the damping of the magneto-rheological elastomer are regulated in real time; the spiral spring can assist the vibration absorbing device in absorbing and reducing vibrating energy. The semi-active type vehicle seat vibration absorbing device with the magneto-rheological elastomer is provided through the joint action of the spiral spring with fixed rigidity and damping and the magneto-rheological elastomer with adjustable rigidity and damping, so that the riding comfort of the vehicle is improved.

The invention provides a reducing valve which comprises a valve body with a fluid passageway, a valve seat dividing the fluid passageway into an inflow passageway body and an outflow passageway body, a valve deck covering the valve body and provided with a guide passageway, a valve rod movably arranged in the guide passageway, a valve clack arranged at the working end of the valve rod and provided with multiple second throttling holes communicated with the outflow passageway body, and a sleeve arranged in the inflow passageway, wherein the second throttling holes are located in the end, close to the outflow passageway body, of a first sealing part, the valve clack is sleeved with the sleeve in a slidable mode and in seal fit with the sleeve. The two end faces of the sleeve are connected with the valve seat and the valve deck respectively in a sealed mode, multiple first throttling holes communicated with the inflow passageway body are formed in the sleeve, and the first throttling holes and the second throttling holes can be communicated with each other when the valve rod moves. By means of the reducing valve, through the first throttling holes and the second throttling holes, double-throttling decompression is achieved for fluid, the adjustable range of output pressure of the reducing valve is widened, and the application range of the reducing valve is widened as well.

The invention provides a virtual reality device based on a controllable liquid crystal lens, and relates to the technical field of three-dimensional display. The virtual reality device comprises a display screen and a controllable liquid crystal lens, wherein the controllable liquid crystal lens is arranged on the display screen; the controllable liquid crystal lens comprises a plurality of electrodes; the electrodes are annularly arranged in the controllable liquid crystal lens. As the concentric and annular electrodes are taken as control electrodes, and the electrodes are respectively powered, the focus can be adjusted at any time, the adjustment range is relatively large, and relatively clear display images can be provided. The invention further provides an adjusting method of the virtual reality device. By adopting the adjusting method, the virtual reality device can be applicable to people with different eye sights, and the demands of users of different eye sights can be met.

The invention discloses a high-pressure oil-control variable damping absorber. The variable damping absorber mainly comprises a piston rod provided with a center hole and an end circular cavity, a piston fixedly connected with the piston rod by a valve core, and a slider movably connected on the outer surface of the valve core. The upper end face inside the slider is limited by the piston rod, the lower part of a slider spring bears against the upper end face of a limiting base of a flow valve, the upper part of the slider spring bears against the lower end face of the upper part of the slider; when the limiting base of the flow valve is exist, the second radial hole of the valve core is closed only until the slider is moved to the lower dead center, and the reliability of a flow valve block is higher at this moment; when the limiting base of the flow valve is not exist, the second radial hole of the valve core and the flow valve block are closed at the same moment, the damping adjustment range is larger; the variable damping absorber is capable of achieving the adjustable damping by using the external high-pressure oil-way, has the advantages of large adjustable range and simple structure, and has the variable damping characteristics by slightly improving on the basis of current passive absorber. Compared with the current damping adjustable absorber, the cost is lower.

The invention discloses a miniaturized S waveband micro-strip ferrite circulator, belonging to the field of a ferrite device in a microwave technology. The circulator comprises a metal ground layer, a gyromagnetic ferrite substrate, a center junction, three large Y-shaped arms and three small Y-shaped arms. The three large Y-shaped arms and the three small Y-shaped arms are sequentially separated at intervals, and the three large Y-shaped arms and the three small Y-shaped arms respectively take a circle center of the center junction as a symmetric center to be distributed on the upper surface of the gyromagnetic ferrite substrate in a manner of forming included angles of 120 degrees among the three large Y-shaped arms and the three small Y-shaped arms. Each large Y-shaped arm is composed of two sections of micro-strip branches with different resistances and the micro-strip branch which is far away from the center junction can be connected with an external port to carry out fed. Each small Y-shaped arm is composed of a plurality of strips in parallel and the quantity of the strips can be adjusted. According to the invention, a novel double-Y junction structure is utilized for designing so that structure disadvantages and design disadvantages of the existing micro-strip ferrite circulator are broken through, the resistance matching is improved and the frequency property is easy to adjust; and the miniaturized S waveband micro-strip ferrite circulator has the advantages of compact structure, reduced whole size and improved integration level, thereby meeting miniaturized requirements of the micro-strip circulator.

The invention relates to a preparation method of an environmental protection coating of a SiCf / SiC composite material guider blade. The preparation method comprises the following steps: preheating a SiCf / SiC composite material guider blade matrix, and performing PS-PVD (Plasma Spraying-Physical Vapor Deposition) to prepare a Si adhesive layer, a mullite transitional layer, a Yb2SiO5 environmental barrier layer and a La2Zr2O7 heat resistant layer in sequence, wherein the environmental protection coating can be applied to a gas environment at 1,400 to 1,700 DEG C. Preparation of the Si adhesive layer, the mullite transitional layer, the Yb2SiO5 environmental barrier layer and the La2Zr2O7 heat resistant layer of the environmental protection coating is completed on the same equipment; the temperature of the matrix is effectively controlled through heating of a PS-PVD spraying gun, so as to prevent amorphous reaction in a deposition process of the mullite transitional layer; the added heat resistant layer enables the environmental protection coating to adapt to the gas environment at 1,400 to 1,700 DEG C; therefore, the preparation method is applicable to preparation of the environmental protection coating of a high-performance guider blade. The preparation method has the advantages that the preparation process is simple, easy to operate, high in stability, wide in applicable temperature range and wide in application range.

The invention relates to the technical fields of electronic components and semiconductors, in particular to a high-resistance value metal oxide film resistor and a manufacture method thereof. The high-resistance value metal oxide film resistor comprises a ceramic matrix, a skin membrane, iron caps and a lead, wherein the skin membrane is formed on the ceramic matrix; the iron caps are positioned in both ends of the ceramic matrix; the skin membrane comprises an inner-layer skin membrane and an outer-layer skin membrane; the inner-layer skin membrane is formed by a target material through vacuum direct current sputtering; and the outer-layer skin membrane is formed by a target material through an ion power supply and radio-frequency sputtering. In the invention, a unique double-layer membrane structure resistor body is manufactured, and the outer-layer skin membrane is a layer of dense metal oxide film actually, has favorable protecting effect on the inner-layer skin membrane and prevents the inner-layer skin membrane from being further oxidized; meanwhile, a parallel connection relation is formed between the inner-layer skin membrane and the outer-layer skin membrane so that a resistance value of the resistor obtains a larger adjustable range; and accordingly, the metal oxide film resistor manufactured by the invention has the advantages of stable performance and high precision, and the resistance value can beyond 100Kohm and is as high as 3.9 megohm.

The invention discloses an antenna device and an electronic device, which are used for solving the problem of limitation on the expansion effect of an antenna working frequency band by an adjustable capacitor in the prior art. The antenna device comprises an antenna, a frequency regulator and a control module, wherein the frequency regulator comprises a resonant module, a first end of the resonant module is connected with a signal transmission port of the antenna, the resonant module comprises an inductor and an adjustable capacitor, the inductor and the adjustable capacitor are connected in a first connection mode so as to expand the regulation range of the antenna working frequency band by the adjustable capacitor, and the control module is connected with the resonant module and used for regulating a capacitance value of the adjustable capacitor based on the target working frequency of the antenna so that the working frequency band of the antenna covers the target working frequency.

The invention discloses a quick-positioning two-component acrylate structural adhesive and a preparation method and a use method thereof. The adhesive comprises a component A and a component B, an acrylate structural adhesive and an epoxy structural adhesive are organically combined together by adopting a blending mode, and thiol curing agents, epoxy resin and epoxy latent curing agents are addedinto different components, so that the thiol curing agents, the epoxy resin and the epoxy latent curing agents are mutually promoted to react. When the component A and the component B are used after being mixed according to the volume ratio of 10:1, the storage is stable at normal temperature, and the operation time is longer; the thiol curing agent of the component A and the epoxy resin of the component B can be initiated to react by low-temperature heating to achieve the quick-positioning effect, and the generated heat is used for initiate the acrylic acid system reaction to form an interpenetration network structure, and the acrylate structural adhesive and the epoxy structural adhesive are organically combined, the adjustable range of raw materials is large, and the structural adhesivewith excellent comprehensive performance is obtained through blending modification.

The invention relates to a drive control circuit which comprises an input power module connected with an input end, a PWM control module connected with the input power module, a perfusion circuit module connected with the output end of the PWM control module, a voltage fluctuation detection module connected with the input power module through an inductor L1 and a constant current source module connected with the voltage fluctuation detection module through a diode D4, wherein the constant current source module is connected with a load. Compared with the prior art, the drive control circuit has the advantages that an electrolysis capacitor is not included in the circuit, the circuit is simple in structure and can be conveniently integrated and miniaturized, and the service life of a power supply is long; the input power module has a reverse-connection-proof function, when the power supply is reversely connected, the circuit does not work, and safety and reliability of the circuit are effectively improved; output wide voltages and currents are adjustable, the adjustable interval is large, use flexibility is high, the application range is wide, and popularization is easy to achieve; the voltage fluctuation detection module can meet requirements for multiple functions and variety.

The invention discloses a submerged arc welding power supply alternating and direct current square wave controller and belongs to a power supply controller for submerged arc welding. The submerged arc welding power supply alternating and direct current square wave controller comprises a main control module, an IGBT (Insulated Gate Bipolar Transistor) driving module and an inverter module; the main control module is accessed to the IGBT driving module and a power input terminal of the controller; the IGBT driving module is accessed to the inverter module; the inverter module is accessed to a power output terminal of the controller and mainly comprises a full-bridge inverter circuit which is formed by a plurality of IGBTs which are in parallel connection with each other. According to the submerged arc welding power supply alternating and direct current square wave controller, voltage and current pulse width modulation control is performed on the IGBTs which are arranged in the inverter circuit and the frequency of a welded square wave and the positive and negative balance ratio of an output electrode are adjusted through the independent main control module and accordingly the adjustable range of the positive and negative balance ratio of the controller is wide and the control on the output current and voltage is accurate; various types of fault detection can be performed on an input power supply of the controller through the main control module; the controller can be matched with the existing direct current submerged arc welding power supply so as to achieve submerged arc welding functions of alternating and direct current function selection and square wave frequency control.

The invention discloses a rotatable computer supporting stand capable of conveniently adapting to different postures of a human body. The rotatable computer supporting stand comprises a fixing block,bearings, a pull rope and a bolt, wherein a fastening stud is fixedly mounted on the bottom surface of the left end of the fixing block, the fixing block is fixedly mounted on the left surface of a bottom plate, first clamping grooves are formed in the outer surface of the top end of the bottom plate, the first clamping grooves are mutually connected with first clamping blocks, the first clampingblocks are fixedly mounted on the inner wall of a circular plate, the circular plate is mounted on the outer side of the top end of the bottom plate, the center of the bottom plate is mutually connected with the bottom end of a supporting shaft through the bearings, the supporting shaft penetrates through the circular plate and a supporting plate, and a connecting shaft is mounted on the outer side of the top end of the supporting shaft. According to the rotatable computer supporting stand capable of conveniently adapting to the different postures of the human body, the extension length of a display screen mounted on a mounting plate can be adjusted through the sliding operation of a connecting sleeve on a fixing shaft, the adjustable range of the rotatable computer supporting stand is increased, and the rotatable computer supporting stand is capable of conveniently adapting to the different postures of the human body.

The invention discloses a method for adjusting the rigidity of an axle box positioning node with sectioning jackets and the axle box positioning node. The axle box positioning node is arranged into the structure that rubber layers are arranged on the outer side of a mandrel, the sectioning jackets are arranged on the outer sides of the rubber layers and an integral jacket is arranged on the outersides of the sectioning jackets, wherein the sectioning jackets are divided into a plurality of circular sleeves with same specifications in pairs, and comprises a main body I positioned on the outerside and a main body II positioned on the inner side, the main body I is an internally hollow cylinder, the main body II is an internally hollow cylinder with concave inclined surfaces at two ends, and the outer side of the main body II is connected with the inner side of the main body I to form an integral body; and different rigidity values of the axle box positioning node in all directions areadjusted by adjusting the value of each parameter of the sectioning jackets so as to meet different rigidity requirements of different types of vehicles on the axle box positioning node in all directions. The sectioning jackets are arranged into a plurality of combined blocks, so that the inner side faces of the cylinders of the sectioning jackets can be lower than the outer side faces at two H-shaped ends of the mandrel, and the adjustable range of the rigidity of the axle box positioning node is preferably enlarged.

The invention discloses a DC voltage-boosting chopper circuit comprising a voltage-boosting inductor, a freewheeling diode, an output capacitor, an MOS switch tube, a first resistor, a second resistor, a third resistor, a voltage-boosting controller and a digital-to-analog converter. The grid electrode of the MOS switch tube is connected with the grid electrode driving signal output end of the voltage-boosting controller. The first resistor and the second resistor are connected in series between the negative end of the freewheeling diode and ground. The digital-to-analog converter is used for outputting corresponding analog voltage according to the inputted digital signal. The third resistor is connected between the analog voltage output end of the digital-to-analog converter and a connecting point of the first resistor and the second resistor. The voltage-boosting controller comprises a comparator. One input end of the comparator is connected with reference voltage, and the other input end is connected with the connecting point of the first resistor and the second resistor. The voltage-boosting controller controls output of a grid electrode driving signal according to output of the comparator. According to the DC voltage-boosting chopper circuit, range of output voltage can be continuously adjusted via software.

The invention discloses an automatic guided vehicle drive suspension device suspended below a vehicle frame; the automatic guided vehicle drive suspension device comprises a drive wheel set and a mount plate; the drive wheel set is fixed below the mount plate; two side edges of the mount plate are respectively fixedly provided with a side guard plate; the lower side angle of the side guard plate is hinged to the vehicle frame; a pressure regulator is transversely fixed on the mount plate, and can adjust the pressure applied to the vehicle frame. The invention also discloses an automatic guided vehicle having the drive suspension device; the pressure of the drive wheel set can be adjusted, thus effectively utilizing the vehicle frame chassis space.

The invention discloses a multifunctional-supercritical particle preparation system. The multifunctional-supercritical particle preparation system integrates a fluid extraction technology, an anti-solvent particle preparation technology, a solution rapid-expansion particle preparation technology, a fluid-enhanced solution diffusion technology, a fluid-assisted microencapsulation technology or theabove functions. The multifunctional-supercritical particle preparation system can meet the preparations of substance extraction, organic micron / nano material preparation and inorganic micron / nano material preparation. The multifunctional-supercritical particle preparation system disclosed by the invention has the advantages of simpleness in operation, wide adjustment range of equipment experimentparameters, strong stability and high production efficiency and the like, has large application potential in the fields of research, preparation and application of materials and has an extremely wideindustrial prospect.

The invention relates to an Ni-SSZ-13 catalyst, a preparation method and application thereof, and mainly solves the technical problems that the preparation cost of an SSZ-13 material in the prior art is expensive, the supported nickel metal diffusion is nonuniform and a methanol-to-olefin catalyst is low in stability and low in catalytic activity. The Ni-SSZ-13 catalyst is prepared from the following components in parts by weight: (1) 0.1 to 20 parts of Ni or an oxide thereof; and (2) 80 to 99.9 parts of an SSZ-13 molecular sieve. The Ni-SSZ-13 catalyst preferably solves the problem, and can be used in industrial production of hydrogenation, hydrocarbon pyrolysis and methanol-to-olefin.

The invention provides an air conditioner system and a control method thereof. The air conditioner system comprises a bottom shell and an impeller. The bottom shell comprises a bottom shell body and avolute tongue. An air outlet is formed between the volute tongue and the bottom shell body. The impeller is arranged in the bottom shell, and the distance between the impeller and the volute tongue can be adjusted. According to the air conditioner system, the distance between the axial flow impeller and the volute tongue in an air way of an air conditioner indoor unit is adjusted, and the adjustable range between a silent mode and a powerful mode of the air conditioner is effectively enlarged on the basis of adjusting a current motor rotating speed.

The invention discloses a multifunctional head massager. A first air bag is mounted in a first massage box and is connected to an air pump; a first massage head is movably mounted in the first massagebox, one end of the first massage head leans against the first air bag while the other end partially extends out of the first massage box, a first reset elastic piece is connected to the first massage head in a sleeving manner, and the first massage box is hinged to a spacing adjustment mechanism; a second air bag is mounted in a second massage box and is connected to the air bag, a second massage head is movably mounted in the second massage box, one end of the second massage head leans against the second air bag while the other end partially extends out of the second massage box, a second reset elastic piece is connected to the second massage head in a sleeving manner, and the second massage box is hinged to the spacing adjustment mechanism. The multifunctional head massager disclosed by the invention can massage shoulders and neck, and also can massage the temples, and the distance between the two massage heads is relatively large in adjustable range.

The invention discloses an ink supply device for an offset press and an ink supply control method. The ink supply device comprises an ink foundation roller and digital ink foundations. The ink foundation roller is driven by an ink foundation roller motor; the digital ink foundations are mounted above the ink foundation roller and are arranged along the axial direction of the ink foundation roller,and each of the digital ink foundations corresponds to eight ink regions on a breadth surface; each of the digital ink foundations comprises an ink supply pump, eight electromagnetic reversing valves, eight ink-spraying heads and a controller; the ink supply pump is driven by an ink pump motor and is provided with an ink inlet hole and eight ink outlet holes; the ink inlet holes of the eight electromagnetic reversing valves are connected to the eight ink outlet holes of the ink supply pump in a one to one correspondence manner; each of the electromagnetic reversing valves is driven by a pneumatic switch, separately; the eight ink-spraying heads are connected to the ink outlet holes of the eight electromagnetic reversing valves in a one to one correspondence manner and are close to the surface of the ink foundation roller; and the controller is in signal connection to the eight electromagnetic reversing valves. The ink supply device and the ink supply control method disclosed by the invention can achieve precise zone control of ink amounts of color cells of a printer.

The invention relates to a method for producing synthesis gas with carbon powder and natural gas / methane as raw materials. The method comprises the steps that carbon powder, natural gas / methane and gasifying agents are subjected to co-gasification reaction at the temperature of 1200-1500 DEG C and the pressure of 1.0-10.0 MPa, the resultant of reaction is subjected to chilling and heat exchange through a cooling system, solid ash is drained to the outside, the synthesis gas product is subjected to ash removal and cooling processing through a Venturi scrubber and a wet ash removal tower, high-concentration synthesis gas is obtained, the volume content of CO+H2 in the synthesis gas is 85.0-95.0%, the content of H2 is 43.0-68.0%, and carbon black water drained from a reaction furnace and the bottom of the wet ash removal tower is drained to a black water treatment workshop section to be treated. The method is wide in range of raw materials, large in production capacity, clean, environmentally friendly, and suitable for multi-line production of industrial large-scale raw material gas preparation.

The invention provides a Venturi mixer with a porous annular cavity. The Venturi mixer comprises a shell 1, a nozzle 2 and an annular cavity 3, wherein the nozzle 2 is arranged inside the shell; the annular cavity 3 is formed outside the shell; the annular cavity 3 is communicated with the interior of the shell 1 through multiple communication holes 7 in the shell 1. The invention further providesapplication of the Venturi mixer with the porous annular cavity in cyanohydrin synthesis. The Venturi mixer has the advantages that due to addition of the annular cavity in the Venturi mixer, mixingsituations of a main fluid and an introduced fluid near a central line are improved, a boundary layer of a mixed fluid is damaged, speed distribution of a fluid cross section is improved, problems ofnon-uniform mixing and low mixing efficiency caused by high main fluid velocities or large introduced fluid flows can be avoided, and in addition, the Venturi mixer is applicable to flow proportioningof introduced fluids and main fluids of a large range, and in addition has a very good mixing effect.

The invention discloses a chuck mechanism convenient to adjust. The chuck mechanism comprises clamping modules; a chuck cover, wherein the top face of the chuck cover is provided with a plurality of sliding grooves, the side face of the chuck cover is provided with an adjusting groove, and sliding bases of the clamping modules are installed on the sliding grooves in a sliding mode; a chuck centershaft assembly which comprises a chassis base and a center shaft, and the chassis base is fixedly connected with the chuck cover; an ejection rod which penetrates through the chuck center shaft assembly and the chuck cover and is used for ejecting cup bodies clamped on the clamping modules; and a chuck faceplate which is arranged in the chuck cover, can rotate along the axis of the ejection rod and is used for adjusting the positions of the clamping modules. During work, the walls of the cup bodies are stressed to fall into the space between a pressing block assembly and a supporting claw andare clamped.

The invention discloses an electric cooking device, a control circuit of the electric cooking device and a cooking method of the electric cooking device. The control circuit of the electric cooking device comprises N+1 coil disc modules, a power module, N switch modules, N+1 power switch drive modules and a controller; the first end of each switch module is connected with the power module, the second end of the ith switch module is connected with the ith coil disc module, the third end of the ith switch module is connected with the (i+1)th coil disc module, and i is equal to 1,2,3,...,N; the controller comprises N+1 power switch drive ends and N switch control ends; each power switch drive end is correspondingly connected with the corresponding power switch drive module, and each switch control end is connected with the fourth end of the corresponding switch module; and according to the control circuit, through control over the number and the combined type of working coils, the heating power of the electric cooking device is adjusted, the electric cooking device can work at a lower power, and the adjustable range of the heating power of the electric cooking device is wide.

The invention discloses a ventilation device suitable for a complex environment and used for removing dust. The ventilation device comprises a shell, a wind inlet device, a moving device and a gas outlet device, wherein a fixedly connected bearing is arranged on the left side of the interior of the shell, and is rotationally connected with the lower end of a rotating rod, a bush is fixedly connected to the upper end of the output shaft of a motor, a hinged steering plate is arranged at the upper end of the rotating rod and on the outer side of the shell, the fixedly connected wind inlet deviceis placed at the upper end of the steering plate, a fixedly connected corrugated pipe is arranged on the rear side of the wind inlet device, a fixedly connected wind inlet pipe is arranged at the right end of the corrugated pipe, the top of a dust concentration box is connected below the wind inlet pipe, and the moving device is arranged at bottom of shell. According to the invention, with the ventilation device, dust in air can be removed, and is wetted by water, and fresh air is discharged; and the ventilation device can move in complex terrains, so the problem that the existing device canonly ventilate a certain position is solved.

The invention discloses a treatment method for loess stratum road and bridge foundations. The treatment method for the loess stratum road and bridge foundations is characterized in that pile point positions are determined and the identification is completed; various construction parameters are determined through a pile forming test; mixture is subjected to weighing and stirring according to the matching ratio; a drilling machine is subjected to vertical correction according to the construction parameters; the construction parameters are measured in the drilling process; the mixture is backfilled in a drill hole in layered manner and is tightly and firmly knocked by a heavy hammer; a transverse drainage slope is arranged on the top surface of a closed bearing layer; and finally, quality detection is carried out to ensure that design requirements are met. According to the treatment method, a pile body is strong in durability, the rigidity of the pile body can be adjusted to be large, thedeformation of the pile body can be well coordinated with the deformation of foundation soil, the soil body surrounding the pile body and the pile is extruded tightly and is firm, the pile body mixture is not contracted after being coagulated and hardened, and the pile body can well adapt to common deformation and bearing upper load of the soil body; the pile top sealing bearing layer is in closecontact with the lower soil layer, the upper load is uniformly distributed, an effective and stable composite foundation bearing structure is formed, the better strength is achieved, the effective and stable composite foundation bearing structure can be synchronously deformed along with the foundation soil layer, and water flow infiltration is effectively prevented.

The invention provides a detachable variable-technological-parameter shearing die which comprises an upper die and a lower die. The upper die is provided with an upper cover plate, an upper die base,an upper clamping plate and a stripper plate in sequence from top to bottom, the upper cover plate and the upper die base are installed together through an upper cushion block, the lower surface of the upper cover plate is provided with a plurality of springs, the springs sequentially penetrate through the upper die base and the upper clamping plate to abut against the upper surface of the stripper plate, the lower surface of the upper die base is provided with a replaceable punch knife block which penetrates through a first groove in the middle of the upper clamping plate, and the upper clamping plate and the stripper plate are movably connected through a first isoheight sleeve. The lower die is provided with a lower die plate, a lower die base and a lower cushion block in sequence from top to bottom, the lower die plate is provided with a lower die plate groove, a replaceable lower die knife edge inlet is placed in the lower die plate groove, and the lower die plate groove is locatedin the advancing direction of the punch knife block. The detachable variable-technological-parameter shearing die is simple in overall structure, small in assembling size, low in manufacturing cost and wide in shear sample application range.

The invention discloses a household foldable and vibratory urinary calculus removing bed. The urinary calculus removing bed comprises brackets and a bed body, wherein the bed body is arranged on the brackets, and the bed body can perform pitching and rollover rotation on the brackets; the brackets adopt a foldable structure, the first bracket and the second bracket on the same side can be folded to reduce the size of the urinary calculus removing bed, thereby saving space and providing convenience for a family to use the urinary calculus removing bed; the bed body is provided with a vibrator,and the vibrator is used for performing vibratory urinary calculus removing on the human body. The household foldable and vibratory urinary calculus removing bed has the advantages that the structureis simple, the use is convenient, the size is small, the pitching angle is large, the urinary calculus removing effect is good, the cost is low, and the urinary calculus removing bed also can serve asa massage health care instrument.