185 results about "Closed chamber" patented technology

The present invention discloses a pneumatically controlled, high-pressure, balanced sewage, two-position, three-way reversing ball valve structure, comprising: a valve seat, a valve ball, and a valve ball centering sleeve installed within a valve body; the valve seat having three openings: a left opening and a right opening, located at the left and right ends of the valve seat, respectively, and a center opening located in the center of the valve seat; a port A located on the left side of the valve body, communicating with the center opening of the valve seat; a port B located on the right side of the valve body, communicating with the right opening of the valve seat; a high-pressure water wellhead connector connected to the left end of the valve body, the port of the high-pressure water wellhead connector being port P, forming a chamber C within the high-pressure water wellhead connector; a feedback piston sealing sleeve forming a closed chamber D at the right end of the feedback piston; chambers C and D being connected via a balancing pipe. The valve valve has reliable sealing performance, requires relatively low water cleanliness, and can be used in sewage reversing valves; it also features fast response speed and high flow rate.

The invention relates to the technical field of tempered film production, in particular to an oil coating all-in-one machine for a flat tempered film, which comprises a shell, a transmission mesh belt, a cleaning assembly, a telescopic driving part, a sealing cover and a plugging film, a transmission mesh belt is arranged on the machine shell; a cleaning assembly is arranged on the machine shell. A plurality of telescopic driving pieces are arranged on the machine shell; the telescopic ends of all the telescopic driving pieces are jointly and fixedly connected with a sealing cover. The inner wall of the sealing cover is an inclined surface; a blocking film is arranged at the bottom of the sealing cover. The closed chamber is formed by combining the closed cover, the blocking film and the tempered film, oil mist sprayed out at a high speed is prevented from diffusing all around after making contact with the tempered film and adhering to the surface of other sprayed or unsprayed tempered film, uneven adhesion of the oil mist on the surface of the tempered film is avoided, meanwhile, oil liquid is prevented from adhering to the back face of the tempered film, and the service life of the tempered film is prolonged. The viscosity reduction of the adhesive layer on the back of the tempered film is avoided and the quality of the tempered film is guaranteed.

The utility model provides a building water supply and drainage pipeline leakproofness detection device, which belongs to the technical field of pipeline installation, and comprises a sliding assembly, two groups of sealing assemblies, a detection assembly and an inflation device, the upper end of the sliding assembly is used for being connected with hoisting equipment, and the lower end of the sliding assembly is provided with a slideway; the two sealing assemblies are suitable for blocking openings in the two ends of a to-be-detected pipeline. The upper end of the detection assembly is slidably connected with the slideway, the lower end of the detection assembly is suitable for clinging to the outer wall of the pipeline and forming a closed cavity with the outer wall of the pipeline, the gas pressure in the closed cavity is detected to detect the leakage area of the pipeline, and the gas filling device is provided with a gas filling pipe which penetrates through at least one sealing assembly and is suitable for filling gas into the pipeline. The building water supply and drainage pipeline airtightness detection device provided by the utility model has the technical effects that the airtightness of pipelines at different positions can be detected, pipelines with different lengths can be detected, pipeline leakage areas can be detected, and the detection efficiency is high.

The invention provides a vertical liquid damper which comprises a closed container, buffer liquid, a horizontal partition part and a horizontal energy dissipation part, a base connected with an external structure to be subjected to vibration reduction is arranged at the bottom of the closed container, and the interior of the closed container is divided into at least two independent closed cavities by the horizontal partition part; each closed cavity is filled with the buffer liquid flowing in a collision mode, the horizontal energy dissipation pieces are arranged in the closed cavities, each horizontal energy dissipation piece comprises a middle hollow channel and a peripheral baffle, and the peripheral baffle is provided with a pore structure for the buffer liquid to pass through in the vertical movement process. The device has the advantages of effective dissipation of vertical vibration energy, simple structure and the like.

The invention discloses an electrically-operated drop-out fuse and a control method, and relates to the field of circuit devices for power supply or distribution, the electrically-operated drop-out fuse comprises a protective insulator, an intelligent control module, a drop-out assembly, a driving mechanism and a transmission mechanism, the protective insulator is of a longitudinally-penetrating groove structure, the top of the protective insulator is provided with a closed upper cover, and the intelligent control module is connected with the drop-out assembly; two sides of the protective insulator extend downwards to form side walls, the side walls and the insulator form a shield used for shielding the upper static contact and the upper moving contact, a closed cavity is arranged at the rear part of the protective insulator, and a driving mechanism is arranged in the cavity; the intelligent control module is electrically connected with the driving mechanism, the driving mechanism is connected with the transmission mechanism, and the intelligent control module controls the driving mechanism to drive the falling assembly through the transmission mechanism to realize opening or closing; according to the fuse and the control method provided by the invention, remote intelligent switch-on and switch-off can be realized, the operation is safe and reliable, the structure is compact, and the protection performance is excellent.

The invention relates to the technical field of precision assembly, in particular to a novel pneumatic flexible leveling unit which comprises a fixed seat, an elastic membrane, an elastic piece, a positioning block and a floating block. The fixed seat is mounted on the moving mechanism, a groove is formed in the bottom of the fixed seat, and the elastic membrane covers the groove to form a closed cavity; the positioning block is mounted at the bottom of the fixing seat, the floating block is nested in the positioning block, and the bottom end of the floating block extends out of the positioning block to be connected with the suction mechanism. The floating block is connected with the positioning block through an elastic piece, the elastic piece can stretch out and draw back in the vertical direction, and the top end of the floating block is attached to the elastic membrane all the time. The air pressure of the closed cavity is adjusted to be first air pressure, after the suction mechanism abuts against the workpiece, the abutting position of the suction mechanism is supported by the workpiece, the floating block is driven to continuously adjust the posture of the floating block, the inclination angle difference between the suction mechanism and the workpiece is automatically compensated under the double-elastic-force action of deformation of the elastic membrane and stretching of the elastic piece in the process, and finally leveling is achieved. According to the invention, the parallelism is automatically adjusted, the precision is high, and the adaptability is strong.

The invention discloses a production device for preparing carbon nanotubes, the production device comprises a closed chamber, a chain conveyor and a heat preservation chamber, the closed chamber comprises an inlet end, an outlet end and a middle pipeline, the middle pipeline comprises an upper-layer pipeline, and the upper-layer pipeline comprises an inlet section, a reaction furnace and an outlet section. The main production steps for preparing the carbon nanotube are as follows: 1) carbon source gas enters a reaction furnace and becomes high-temperature gas under the action of a heating device; (2) the catalyst falls into a material box located at the inlet end through a feeding device; (3) the material box enters the reaction furnace through the inlet section; 4) stacking carbon nanotubes generated by the carbon source gas under the action of a catalyst in a material box; 5) the material box in the reaction furnace enters the outlet end through the outlet section, 6) the opening of the material box is changed from upward to downward at the position of the chain wheel, and meanwhile, the carbon nano tube in the material box falls into the storage bin through the discharging device.The device has the main advantages of being simple in structure, high in efficiency, low in energy consumption, safe, reliable and easy to maintain.

The invention relates to the technical field of oxidation treatment of powder metallurgy products, and discloses a surface oxidation treatment device for high-airtightness powder metallurgy products, which comprises a pretreatment mechanism, one end of the pretreatment mechanism is fixedly connected with a steam treatment furnace, and a conveying mechanism is mounted between the pretreatment mechanism and the steam treatment furnace; a powder metallurgy product assembly is conveyed on the conveying mechanism; the pretreatment mechanism comprises a first machine body, an outer shell, a ventilation shell, a vacuum assembly and a first steam assembly, the outer shell is connected to the upper side of the first machine body, and the ventilation shell is fixedly connected to the inner side of the outer shell. According to the active pretreatment method, the closed cavity is vacuumized firstly to form negative pressure, then low-temperature steam is injected, and the steam is forcibly and rapidly permeated into all the deep holes of the powder metallurgy product through the pressure difference. The problem of non-uniform permeation caused by obstruction of residual air in pores in traditional direct steam treatment is fundamentally solved.

The present application relates to a kind of fuel power device, the center wheel is connected by output shaft in the center through hole of shell, the circumference of center wheel is equipped with several power blocks;Several rotors are equipped on the outer periphery of center wheel, each rotor is matched with the independent space of shell by bearing seat, each rotor is linked with output shaft by transmission mechanism I;Several oblique tooth grooves are equipped on the rotor, power block passes from tooth groove when rotor is tangent with center wheel and runs, the shell corresponding to each rotor, power block and air inlet forms explosion chamber when power block passes from tooth groove, spark plug is provided at air inlet, so that explosion chamber is filled with a certain proportion of air and fuel gas and produces blasting, and power block is pushed;Several exhaust ports are provided on the surface of shell, and exhaust port is staggered with explosion chamber.This power device forms closed chamber by carousel transmission structure, and makes fuel mixture gas blast production power, so as to realize the production of power source.

This invention discloses a method for pre-fabricating porosity defects in nickel-based alloy welds, comprising: S1.1, applying a bottom weld bead structure to the surface of a metal test plate, the bottom weld bead structure comprising N consecutive adjacent weld beads, where N is an integer greater than 1; controlling the welding position of adjacent weld beads to form a gap between each pair of adjacent weld beads; S1.2, applying grease into each of the gaps as a gas source to induce porosity; S1.3, applying a second weld bead structure on the bottom weld bead structure, using the second weld bead structure to completely cover each of the gaps, encapsulating the grease, and forming one or more first closed chambers containing grease. This invention organically combines the porosity generation law of nickel-based welds with welding process control, successfully pre-fabricating porosity defects, and laying the foundation for the study of the porosity generation mechanism of nickel-based welds and subsequent process improvement.

The invention discloses a laser welding device and method based on a transparent plastic material, and the device comprises a pressing jig, a multi-directional moving assembly, a laser welding head, a quartz pressing plate, a feeding and discharging module and a jig carrier plate which are arranged on a workbench, and the jig carrier plate is provided with a heatable welding jig; the welding jig is provided with an elastic cavity with an opening in the upper portion, a plastic product to be welded is placed in the elastic cavity, and the quartz pressing plate is used for pressing the elastic cavity to form a closed cavity and abutting against the plastic product; a monitoring unit is further arranged in the pressing jig and used for detecting the downward pressing force of the quartz pressing plate and the welding collapse value in the welding process. The laser welding device based on the transparent plastic material can effectively solve the problems of insufficient light absorption, insufficient welding strength and long welding time of transparent plastic in the welding process.

The invention discloses an anti-corrosion device for a directly-buried steam pipeline, and relates to the technical field of pipeline corrosion prevention. According to the scheme, the device comprises a connecting mechanism used for being fixed to the outer wall of the steam directly-buried pipeline in a hooping mode; the closed box body is arranged on the connecting mechanism, the closed box body comprises an underground closed pipe located under the ground and an overground maintenance box body located on the ground, and the underground closed pipe is in sealing fit with the outer wall of the steam directly-buried pipeline through a sealing ring to form a closed cavity; the sacrificial anode is arranged in the overground maintenance box body; and the electrode assembly is arranged in the closed cavity and used for being electrically connected with the outer wall of the steam directly-buried pipeline and the sacrificial anode to form a cathode protection loop. By arranging the connecting mechanism composed of the pipe clamping piece with the bottom of the arc-shaped structure and the frame-shaped connecting plate, during installation, only limited excavation needs to be conducted on the two sides of the pipeline, and the earthwork excavation volume and the influence of construction on pipeline operation are greatly reduced.

A kind of inside tube spraying device of noise reducer, including base, vertical plate is welded on base, a pair of fixed ring is welded on the upper end of vertical plate, outer tube cover is welded in fixed ring, the end of outer tube cover is shaped with convex edge, end disc is installed on convex edge by screw, rotating tube is coaxially and rotatably arranged on end disc, a pair of communication pipe is communicated on rotating tube, rotating plate is fixed on the inner side end of rotating tube, outer tube and inner tube are fixed on the other end of rotating plate, a plurality of spray heads are fixed on the inner wall of outer tube and the outer wall of inner tube.The utility model discloses when spraying, a more closed chamber is formed by outer tube cover and the sealing disc connected and fixed thereon, so that, paint can be avoided to splash in the process of spraying, to avoid causing pollution to environment.

The utility model discloses a water quality sampler convenient for sampling, which comprises an inner cylinder and an outer cylinder which are sleeved inside and outside and rotationally connected, the inner cylinder is provided with a closed chamber, partition plates are arranged in the closed chamber from top to bottom at intervals, the partition plates divide the closed chamber into a plurality of water storage cavities, and a water inlet is arranged on the side wall of each water storage cavity; water inlet grooves matched with the water inlets are formed in the outer cylinder and are communicated with the outside; the outer cylinder and the inner cylinder rotate relatively so that the water inlet groove openings can be communicated with the corresponding water inlets, the water inlets can be communicated with the outside, or the water inlet groove openings and the corresponding water inlets can be staggered so that the water inlets can be closed. During water taking, the water taking device goes deep into a preset depth of a water area, the inner cylinder and the outer cylinder are relatively rotated, water bodies with different depths can be guided into the water storage cavities, then the inner cylinder or the outer cylinder is reversely rotated, the water inlets are closed, and then the water taking device is taken out of the water area, so that the water quality of the target depth of the water area can be sampled; the sampling accuracy of target water quality is improved.

The application discloses a supercooling box suitable for a condenser and a horizontal condenser, wherein the cover plate of the supercooling box is horizontally arranged at the top, the arc-shaped plate is extended upwards from the bottom of the arc-shaped plate and is buckled with the upper end cover plate, the outlet is arranged at the middle of the bottom, the notches are arranged at the two ends to form the liquid inlet, the end plate, the cover plate and the arc-shaped plate form a closed chamber, the baffles are distributed and arranged in the closed chamber, the liquid flow forms a serpentine or zigzag flow channel along the baffles in the closed chamber, the two ends of the supercooling box are arranged at a distance from the tube plate at the two ends of the cylinder, and the arc-shaped plate at the bottom of the supercooling box is arranged at a distance from the cylinder and is consistent with the arc of the cylinder. The defects that the existing condenser is easy to accumulate refrigerant and the refrigerant is gathered at the water inlet side are improved.

The invention discloses a rotary explosion-proof pipe cutter which comprises a base and a turntable, the base and the turntable are provided with opposite openings and are sleeved together to form a relatively closed cavity, the base and the turntable are respectively provided with a through hole for a steel pipe to penetrate, the base is provided with a pipeline fixing mechanism, and the outer side wall of the turntable is provided with a stress application rod extending outwards. A tool rest is movably sleeved with a penetrating hole in the rotary disc, a roller blade is installed at the opening end of the inner side of the tool rest, a fastening frame covering the tool rest is further fixed to the outer side wall of the rotary disc, and after the middle threaded section of the push broach screw is in threaded connection with a threaded hole in the fastening frame, the head end of the inner side of the push broach screw penetrates through the vertical part of the tool rest and then is connected with a hexagon nut. The extrusion cutting technology is adopted, no spark is generated in the cutting process, heat production is low, and the risks of fire disasters and explosions caused when the device is used in combustible matter or combustible gas environments are prevented; the blade is located in a closed environment, the risk of mechanical injury to people is avoided, and even if the blade is broken under the extreme working condition, the blade cannot fly to hurt people.

The invention discloses a reinforcing steel bar connecting sleeve, a connecting structure and a construction method, and relates to the technical field of building reinforcing steel bar connection.The reinforcing steel bar connecting sleeve comprises a sleeve body and reinforcing steel bars to be connected, and the sleeve body comprises a sleeve body and a sealing gasket located at the end opening of the sleeve body; a closed cavity is formed in the barrel through the sealing gasket, and a cementing material is arranged in the closed cavity of the barrel; the connecting reinforcing steel bars penetrate through the sealing gasket and penetrate into the cylinder body, the connecting reinforcing steel bars are wrapped by the cementing material, and the cylinder body is connected with the reinforcing steel bars. The invention has the advantages that the cementing material is injected into the sleeve in advance, only the reinforcing steel bar is inserted during installation, the installation is convenient, and the connection is reliable; due to the structure of the sealing gasket, little cementing material leaks out, the connection of the sleeve is visually checked due to the arrangement of the material bolt hole, and compared with an existing grouting sleeve, the connection quality is better guaranteed; the sleeve can be applied to a cast-in-place environment and a prefabrication environment, and the other end of the sleeve is provided with ports in different forms, so that the sleeve can be suitable for various occasions and is convenient to install and efficient in connection.

The invention relates to the technical field of shield pumps, and discloses a gap self-compensation axial force balance shield pump based on heterogeneous material thermal matching, which comprises a pump body, a pump cover assembly and a motor shell assembly which are enclosed to form a closed cavity for mounting a rotor part; the rotor component comprises an impeller, the impeller is arranged in an inner cavity of the pump body, a rear cover plate of the impeller is provided with an annular rear opening ring extending in the axial direction, the motor shell assembly comprises a motor shell, the end, facing the pump body, of the motor shell is provided with an annular opening ring, the annular opening ring and the annular rear opening ring are oppositely arranged in the radial direction, and a rear opening ring radial gap is formed between the annular opening ring and the annular rear opening ring. The impeller is made of a first polymer-based composite material, the motor shell is made of a second polymer-based composite material, and the thermal expansion coefficient of the first polymer-based composite material is larger than that of the second polymer-based composite material. According to the invention, the situation that the main thrust bearing liquid film bears too high load at high temperature can be avoided, and a dynamic and self-adaptive axial force compensation system is formed.

The utility model relates to the technical field of sealing equipment, and aims to provide a sliding sealing door for totally sealing negative-pressure dust removal equipment of a car dumper, which comprises a sliding rail and a steel rail which are arranged on the upper side and the lower side of a doorway of a car inlet end and a car outlet end of a sealed chamber, and a movable door is arranged between the sliding rail and the steel rail. The middle of the inner side face of the movable door is connected with a support through a shifting fork assembly arranged on the movable door, the support is located above the sliding rail, the top of the shifting fork assembly is connected with an oil cylinder, and the tail end of the oil cylinder is installed on the sliding rail and the outer wall of the closed chamber through a base. According to the utility model, the shifting fork assembly is driven by the hydraulic cylinder and is matched with a dynamic matching structure of the pin shaft and the strip-shaped hole, so that the opening and closing actions of the movable door are ensured to be completely synchronous with the car leaning and pressing operations of the car dumper, and the system coordination is improved; and a three-dimensional constraint system is formed by combining limiting and guiding of the backstop and the connecting rod assembly, so that the door body is effectively prevented from derailing, and the fault occurrence rate is reduced.

A downhole solids separator having: a plurality of solids separation modules, a production tube disposed therein, one or more limited entry ports in the production tube, placed in each of the modules, an intake port in the lower half of each module opening into a wellbore annulus, the intake port below the limited entry port of the module, a closed chamber for collecting solids, isolated from the well bore, the closed chamber below modules, a solids conveying conduit from at least one module, opening into the closed chamber, an opening restricted to less than the size of the production tube in the conduit near the bottom of the module, an opening in the production tube in the closed chamber, where the production tube opening and conduit opening are configured to effect a drop fluid velocity into production tube to a level insufficient to carry solids into the production tube.

The utility model discloses a quick-changing device for a guider of an electric spark small hole machine, which comprises a guide sleeve seat, a closed cavity is arranged in the guide sleeve seat, the upper end of the closed cavity is open, the bottom of the guide sleeve seat is coaxially provided with an inserting hole along the vertical direction, and the lower end of the closed cavity is communicated with the upper end of the inserting hole; the guide device further comprises a guide positioning piece and a guide device sleeve. The guide positioning piece is inserted into the closed cavity from top to bottom, the upper end of the guide positioning piece is hermetically assembled with the open end of the closed cavity, and the lower end of the guide positioning piece is inserted into the insertion hole for coaxial positioning; rapid positioning of the guider sleeve can be achieved through matching of the alignment groove and the guider sleeve, and meanwhile rapid fixing operation in the positioning process can be achieved through matching of the piston, the limiter and the guider sleeve. According to the utility model, through the cooperation of the piston and the plurality of bosses, when the guider sleeve is disassembled, the guider sleeve can be loosened and pushed away from the guide positioning piece.

The utility model relates to the technical field of pipe gallery protection equipment, in particular to pipe gallery electric power fireproof protection equipment which comprises a power cable, a fan and a heat exchange assembly, a lower bin shell is arranged at the bottom of the power cable, an upper bin shell is arranged above the lower bin shell, and a lower sealing edge and an upper sealing edge are arranged on the two sides of the lower bin shell and the two sides of the upper bin shell respectively. A heat exchange assembly is arranged on one side of the lower bin shell and one side of the upper bin shell, and a fan is arranged on one side of the heat exchange assembly. The lower bin shell, the upper bin shell, the lower sealing edge and the upper sealing edge are arranged on the outer side of the power cable to form the closed cavity, the carbon dioxide gas is filled to isolate oxygen, the power cable is prevented from catching fire due to high temperature or other factors, meanwhile, the fan is arranged to drive the carbon dioxide gas to circularly flow in the closed cavity and the heat exchange assembly, and the heat exchange efficiency is improved. The heat generated by the power cable is taken away, the carbon dioxide gas is cooled to guarantee the heat dissipation capability, and the power cable is further prevented from being on fire at high temperature.

This application provides a device and method for measuring the amount of electrolyte adsorbed on an electrode. The device includes a housing, a storage tank, a weighing component, a driving component, and a data acquisition controller. The housing has a closed chamber, in which the storage tank, weighing component, and driving component are all located. The weighing component includes at least one weighing device, each weighing device including a suspension rod, a suspension damping device, and a weight sensor. The suspension end of the suspension rod is located above the storage tank, and the suspension rod is connected to the weight sensor through the suspension damping device. The driving component is used to drive the storage tank or the weighing component to move up and down. The data acquisition controller is connected to the weight sensor and is used to collect and process the data measured by the weight sensor. This application can measure the mass of electrolyte adsorbed on the electrode in real time and is simple to operate.

The utility model discloses a preservative film wrapping machine capable of removing bubbles, and relates to the field of wrapping machines, the preservative film wrapping machine comprises a mounting rack, the inner wall of the mounting rack is fixedly connected with a positioning rod, the outer wall of the positioning rod is fixedly connected with an air extracting pump, one side of the air extracting pump is provided with an air pipe, one end of the air pipe is provided with an air extracting head, and the other end of the air pipe is provided with an air outlet. And a fixing frame is mounted on the outer wall of the air exhaust head. The fixing frame is arranged to clamp and fix the air exhaust head, when the device is used, the arrangement of the fixing frame and the air exhaust head facilitates air exhaust of the inner space wrapped by the preservative film, air bubbles can be conveniently removed, the usability of the device is improved, the connecting frame is arranged to move the limiting frame, and when the device is used, the air exhaust head is clamped and fixed through the connecting frame. And by arranging a connecting frame and a limiting frame, the preservative film can be conveniently extruded and fixed, the preservative film is prevented from moving, meanwhile, a sealed cavity is formed by the limited preservative film, air exhaust and bubble removal are facilitated, and the usability of the device is improved.

The invention discloses a sand wind early warning device, a self-calibration method and an early warning method. The sand wind early warning device comprises a collection unit, a counterweight unit, a gravity response mechanism, a trigger switch and an alarm actuator. The collecting unit is exposed outside to receive sand wind, the counterweight unit is arranged in the closed cavity and internally provided with a reference counterweight, the counterweight unit and the closed cavity are in suspension connection through the balance rod, the trigger switch responds to a displacement signal of the second end of the balance rod, and the alarm actuator is electrically connected with the trigger switch. The collecting unit can directly receive external wind and sand, the weight of the collecting unit is increased along with wind and sand accumulation, the second end is driven to move through the lever effect of the balance rod, the switch is triggered to act, the alarm actuator is driven, and real-time monitoring and alarm of the wind and sand accumulation state are achieved. The problems that the severity of wind and sand floating in the equipment terminal box cannot be visually reflected and an alarm cannot be given in the prior art are solved.

The invention provides a gas leakage detection device for surface soil. The gas leakage detection device for surface soil comprises a cylinder, a gas sensing assembly and a diaphragm, one end of the cylinder is open, the other end of the cylinder is closed, the diaphragm is connected with the cylinder and transversely arranged in an inner cavity of the cylinder so as to divide the inner cavity of the cylinder into a closed chamber and an open chamber, the closed chamber is used for forming negative pressure, and the open chamber is used for forming negative pressure. The open cavity is provided with a gas sensing assembly, and the open end of the cylinder is used for being inserted into soil. According to the gas leakage detection device for the surface soil, the open end of the cylinder is inserted into the surface soil, so that gas in the soil can enter the open cavity, and after negative pressure is formed in the closed cavity, the diaphragm transmits the negative pressure to the open cavity, so that the gas in the soil is sucked in and retained in the open cavity; and then components are detected by the gas sensing assembly, so that whether gas leakage occurs or not is judged.

The invention discloses a portable fire scene residue classifying and sorting device and method for fire investigation, the portable fire scene residue classifying and sorting device comprises a base located at the bottom, an outer barrel arranged on the base and a discharging bin installed at the top of the outer barrel, a closed containing cavity is formed in the outer barrel, and a controllable magnetic tower is arranged in the closed containing cavity; the magnetic tower is used for providing alternating magnetic fields with different intensities; when fire scene residues in the discharging bin freely fall into the closed containing cavity through a discharging opening in the discharging bin, the fire scene residues of different types transversely move under the action of the alternating magnetic field to be classified and sorted. The magnetic tower comprises a rotating tower body and a plurality of permanent magnet sets, the rotating tower body is provided with a plurality of magnetic roller sections in the height direction, and the permanent magnet sets are correspondingly arranged on the peripheral wall of the outer side of each magnetic roller section. And the projections of the cross section outlines of the plurality of magnetic roller sections on the horizontal plane are gradually reduced from top to bottom. The device has the advantages of being good in sorting effect and high in practicability.

The utility model discloses waste shredding and baking equipment which comprises a closed chamber, a shredding machine is arranged on the left side of the closed chamber, a connecting pipe is arranged at the upper end of the closed chamber, a sleeve and an air outlet hole are arranged at the upper end and the lower end of the connecting pipe respectively, two supporting columns are arranged in the closed chamber and connected with a rolling shaft respectively, and the rolling shaft is connected with a motor. A roller is arranged between the two rolling shafts, an upper cover plate and a lower cover plate are arranged at the upper end and the lower end of the roller respectively, two symmetrical inclined blocks are arranged on the lower portion in the roller, a plurality of small holes are formed in the side wall of the roller, and the problem that oil and water cannot be effectively treated from oil-containing waste at the head and the tail of the rolling mill can be well solved.

The invention relates to a novel fuel power device which is characterized in that a central through hole of a shell is connected with a central wheel through an output shaft, and a plurality of power blocks are arranged on the circumference of the central wheel; a plurality of rotors are arranged on the periphery of the center wheel, each rotor is matched with the independent space of the shell through a bearing seat, and each rotor is linked with the output shaft through a transmission mechanism I; a plurality of inclined tooth grooves are formed in the rotor, and when the rotor and the center wheel run in a tangent mode, the power blocks pass through the tooth grooves; a plurality of air inlets are formed in the back face of the shell, when the power blocks pass through the tooth grooves, each rotor, each power block and the shell corresponding to the corresponding air inlet form an explosion cavity, spark plugs are arranged at the air inlets, the explosion cavities are filled with air and fuel gas in a certain proportion, explosion is generated, and the power blocks are pushed; a plurality of exhaust ports are formed in the surface of the shell, and the exhaust ports and the explosion cavities are arranged in a staggered mode. According to the power device, a closed cavity is formed through a rotary disc transmission structure, fuel mixed gas is exploded to produce power, and therefore production of a power source is achieved.

The application belongs to the field of water pumps, and particularly relates to a water pump, which comprises a pump body with a cavity, an impeller body installed in the cavity of the pump body, the impeller body comprising an upper circular sheet, a lower circular sheet and a plurality of single circular-arc blades, the plurality of single circular-arc blades being arranged in a circular array and located between the upper circular sheet and the lower circular sheet, the lower circular sheet being provided with a mounting hole, an impeller seat comprising a base and a plurality of three-dimensional twisted blades arranged in a circular array on the base, the base being in butt joint with the mounting hole, the plurality of three-dimensional twisted blades corresponding to the plurality of single circular-arc blades one by one, the single circular-arc blades and the three-dimensional twisted blades having different curvatures, the corresponding single circular-arc blades and three-dimensional twisted blades jointly forming impeller blades, and the plurality of impeller blades and the inner wall of the cavity jointly enclosing a plurality of closed chambers for pumping. The application can simplify the impeller processing procedure and reduce the processing cost.