188results about How to "No need to clean up" patented technology

The invention discloses a double-roller crusher comprising a pedestal frame, a roller support, a driving roller, and a driven roller. The roller support is arranged on the pedestal frame. The driving roller is arranged on a driving shaft, and the driven roller is arranged on a driven shaft. The driving shaft and the driven shaft are arranged in parallel on the roller support. The crusher is characterized in that a roller space adjusting device is arranged on the driven roller. The crusher has the advantages that the double-roller crusher is easy to adjust and hard to be blocked, and has low failure rate.

The invention discloses inner hexagon stamping equipment of core bodies of valve cores, and belongs to the technical field of mechanical equipment. The stamping equipment comprises a support, the support is provided with an index plate, the index plate is provided with a plurality of assembly stations, and a feeding device, a detecting device, a punching device, a chipping removing device, a discharging device and a re-detecting device are sequentially arranged around the assembly stations in the rotation direction of the index plate. The core bodies are moved to the assembly stations through the feeding device, the index plate rotates, the detecting device detects whether the core bodies exist, then the punching device punches inner hexagons in the core bodies, the chipping removing device removes chippings generated in the inner hexagon stamping process, and finally the core bodies are discharged and collected and return to the feeding position after detected by the re-detecting device. According to the stamping equipment, rotating of the index plate, feeding of the feeding device and operating of the punching device are driven by one drive device, and control is accurate and simple.

The invention discloses a method of preparing plasma aquaculture water, which mainly includes: setting up raw plasma water preparation equipment, preparing raw plasma water and mixing the raw plasma water. The method has the advantages that the plasma aquaculture water prepared by the method is high in oxygen content, dissolved oxygen in the water is maintained more than saturated for a long time, no air pump needs to be used, allowable fishes and shrimps per unit volume are denser, economic benefit is higher, the plasma aquaculture water can be self-clean for a long time and capable of continuously purifying, extra organics in the water can be degraded for a long time to maintain health of the water, no drug needs to be added, the aquaculture water capable of continuously disinfecting has no side effects to waters and fishes, controlling various fish diseases can be realized without adding antibiotics and various drugs, no cleaning of pond sludge is needed, the aquaculture water and the pond sludge are in reaction complementation, and the pond sludge which is modified needs no clearing.

The invention discloses an intermediate-temperature low-cesium fluoroaluminate brazing flux and a preparation method thereof, can be applied to furnace brazing and flame brazing of pure aluminum and an aluminum alloy, and belongs to the field of brazing materials. The brazing flux consists of 32 to 42 mass percent of aluminum fluoride, 28 to 36 mass percent of potassium fluoride, 1 to 20 mass percent of cesium fluoride and 17 to 22 mass percent of one or two of potassium chloride and potassium bromide and can be prepared by a deionized water boiling method or a deionized water smelting method. The melting point of the brazing flux is 490 to 521 DEG C, the content of precious metal salt CsF ranges from 1 percent to 20 percent; a deliquescence phenomenon cannot occur in the air; postwelding brazing flux residues do not corrode joints, the flame adaptability is good, and the brazing flux is suitable for aluminum and aluminum alloy flame brazing and furnace brazing.

The present invention discloses a full-automatic oil separation lifting integrated device, including a debris separation tank, an oil-water separation tank and a sewage lifting tank which are communicated. The debris separation tank is connected with a sewage inlet pipe. The water inlet of the debris separation tank is provided with a mechanical grid which can automatically remove solid debris. The top of the oil-water separation tank is provided with an automatic oil wiper. The automatic oil wiper is communicated with an oil collection barrel. The bottom end of the oil-water separation tank is provided with a mud collection barrel communicated with the oil-water separation tank. The integrated device is compact in structure, saves civil construction, has the functions of efficient oil separation, automatic debris clearing, efficient mud discharging and automatic sewage lifting and discharging, and has the advantages of environmental protection, health, energy conservation, and small space occupation.

The invention discloses a negative oxygen ion air exchanger with screen dust removal. The air exchanger comprises a stand, a machine box and a circuit control system, wherein the machine box is hung in the stand through a hanging rod; two or three inclined screens are fixed in the machine box; an eccentric shaft which transversely penetrates the machine box is arranged in the waist middle of the machine box; through rotation of the eccentric shaft, the machine box is synchronously vibrated; a belt wheel is arranged at one end of the eccentric shaft; a motor is fixed above the stand; and the eccentric shaft is synchronously rotated through operation of the motor. The negative oxygen ion air exchanger disclosed by the invention is wide in application range and high in dust removal efficiency; and after dust is removed through the two or three screens, fog-like water vapor is sprayed on the space of the last screen, and negative ions generated from friction and vibration are combined with the water vapor to form negative oxygen ions which are air vitamins and can make users feel comfortable to breathe, thereby achieving the purposes of preserving health and prolonging life.

A device for temperature-controlled aerobic-anaerobic coupled biological hydrogen production comprises a fermentation tank which is installed on a base, wherein the base is provided with a universal wheel which can rotate for 36 degrees and a wheel lock; one side of a fermentation tank body is provided with a feed port, and the other side of the fermentation tank body is provided with a discharge port; the inner part of the fermentation tank is a double-reaction area structure which consists of an aerobic pretreatment chamber and a fermentation hydrogen production chamber, and valves which can be opened from one direction are respectively arranged in the middles of the aerobic pretreatment chamber and the fermentation hydrogen production chamber; a baffle is installed at the inner wall of the fermentation tank; the fermentation tank body is of a double-layer structure, namely two independent interlayers wrapping the aerobic pretreatment chamber and the fermentation hydrogen production chamber; heat transfer liquid is filled in interlayers; the two interlayers are respectively provided with a liquid inlet valve and a liquid discharge valve, and connected by pipelines to form a temperature control layer; and a nanophase ceramic membrane roller penetrates through the center of the tank body, and the gas outlet of the nanophase ceramic membrane roller is connected with a gas collection device. The invention further discloses a method for biological hydrogen production utilizing the device.

The invention relates to an automatic magnetic check valve, which comprises a cover body, an upper magnet, a valve body, a shaft seat, a valve, a lower magnet and a sealing ring, wherein the shaft seat is arranged on one side of the bottom of the valve body; the valve is hinged on the shaft seat; the upper magnet is arranged on the valve body; the lower magnet is arranged on the valve; the sealing ring is arranged between the valve and the valve body; and the upper magnet and the lower magnet are in a Z-plane asymmetric structure. When asymmetric magnets attract each other, an Fx component force not equal to zero is generated, the consistency of the repeated opening / closing action of the valve is greatly improved under the action of the Fx, and the valve is closed to be accurately attracted and sealed; the valve body has a high flow structure, so that an effective area of fluid flowing through the valve body is greatly improved; the valve body is hardly wound with hair and cotton and is cleaning-free; the valve can realize 90-degree opening in a circular pipeline, the drainage is not hindered and the flow velocity is high; and the overflow of sewage is prevented, polluted air, insects and cockroaches are prevented. The check valve is conveniently arranged at a sewage pipeline to replace the conventional water return bend, is suitable for sewage drainage, and is also suitable for other fluid pipelines with one-way flow requirement.

The invention relates to a quenching machine comprising a stand, a cylinder, an upper pressure plate, a lower pressure plate, sinks, a water pump and a water circulation system. The cylinder is vertically fixed at the top of the stand; a cylinder piston rod penetrates through an upper arm of the stand and is fixedly connected with the upper pressure plate at one end part; the lower pressure plate is fixed on a stand worktable and superimposed on the upper pressure plate in a vertical direction; the working surfaces of the upper pressure plate and the lower pressure plate are opposite; and the sinks are arranged at the backs of the upper pressure plate and the lower pressure plate and connected with the water circulation system which is provided with the water pump to ensure the circulating flow of cooling liquid in the water circulation system.

The present invention provides a swinging compressor of junk compression equipment, which comprises a compression box. The two sides inside the compression box are respectively provided with a hydraulic cylinder; the inside of the compression box is also provided with two push-head swing arms which can rotate and swing up and down and a push head; the two push-head swing arms are respectively arranged on the two sides inside the compression box; the rear end of the push-head swing arm is articulated with a push head hinged base on the body of the compression box; the front ends of the push head and the two push-head swing arms are fixedly connected with each other; the upper ends of the two hydraulic cylinders are articulated with the upper support seat on the body of the compression box and the lower ends thereof can be the movable ends respectively articulated with the middle part of the two push-head swing arms; the front part inside the compression box is fixed with a rail arc plate; a gap is arranged between the bottom part of the push head and the rail arc plate. The present invention has simple structure, extremely low noise and no interior cleaning, and can ensure the collection and transport of junk under the state of high-compression dehydration, which is a junk compressor with energy saving and environmental protection. The swinging compressor of the present invention can be widely used as a junk collecting device in urban roads, resident sub-districts, industrial zones, villages and towns.

The invention discloses a device for measuring the volume of a warhead to solve the technical problems that measuring errors are large and cleaning is difficult when a liquid medium measurement method and a solid medium measurement method are adopted. The device comprises a constant volume cylinder block, a piston, a sealing ring, pressure meters, air guide pipes, a sealing plate, a pressing plate, a fixing base, a movable mounting frame and the like. The constant volume cylinder block, the piston, the sealing ring and the pressure meters are arranged on the movable mounting frame. A powder charging port of the warhead is sealed through the sealing plate, the pressing plate and the fixing base. The air guide pipes are arranged between the constant volume cylinder block and the pressure meters and between the constant volume cylinder block and the pressing plate. The device is mainly used for precise measurement of the volume of a powder chamber of the warhead.

The invention discloses a portable high-precision masonry mortar-laying device. The portable high-precision masonry slurry-laying device comprises a mortar cylinder, wheel-type rolling mechanisms are distributed at the bottom of the mortar cylinder, each wheel-type rolling mechanism is provided with a correcting mechanism and an autogiration stirring mechanism, and a discharging port is formed in the bottom of the rear side of the mortar cylinder and provided with an adjusting mechanism. The invention further discloses a working method of the portable high-precision masonry mortar-laying device. The working method comprises the following steps that a scale mark is verified and adjusted; the discharging port is completely blocked by an adjusting baffle; a mortar material is added into the mortar cylinder and sufficiently stirred; arc strips are adjusted and fixed, and therefore the arc strips are attached to masonry side faces; the adjusting baffle is slid to a designated scale mark; and the device is moved by manual work at a constant speed. According to the portable high-precision masonry mortar-laying device and the working method thereof, the structural design is simple, maneuverability is high, the construction difficulty is small, the construction period is effectively shortened, manpower and material resource cost is saved, and the masonry quality of a building is ensured.

The invention discloses a laser cutting equipment convenient to clean. The laser cutting equipment comprises a base, a three-coordinate walking part, a laser head and a bearing part, the laser head is arranged on the three-coordinate walking part, the three-coordinate walking part is arranged on the base and used for driving the laser head to move on the X axis, the Y axis and the Z axis, and the three-coordinate walking part comprises a walking frame and a moving rack. According to the laser cutting equipment with a rolling wheel replacing a plate supporting plate, when the laser head moves to the position below the rolling wheel, the rolling wheel can be automatically moved away, therefor, slag cannot be attached to the rolling wheel, cleaning of the rolling wheel is avoided, the cutting equipment is convenient to clean, meanwhile, the rolling wheel is automatically moved away, a cut plate can conveniently fall off, laser equipment failures caused by the fact that the plate do not fall off and is clamped on the supporting plate are avoided, the service life of laser cutting equipment is prolonged, the working efficiency of the equipment is improved, the maintenance cost is reduced, and the enterprise burden is relieved.

The invention discloses an overflow preventing method and a food processor. The overflow preventing method comprises the steps that food in the food processor is processed with a cutter set or an electric heater; a capacitor is formed by a metal sheet on a signal PCB and food in a cup body, the capacity of the capacitor changes due to the volume change of the food in the cup body, the capacitor is charged and discharged and generates charge moving signals on the signal PCB, and the signal PCB transmits the charge moving signals to a control circuit board; the control circuit board receives the charge moving signals and judges the volume of the food in the cup body through the charge moving signals; if the volume of the food in the cup body exceeds a preset value, the control circuit board sends signals to control the working power of the electric heater or the cutter set. In the overflow preventing method, the control circuit board judges the volume of the food in the cup body through the charge moving signals on the signal PCB, response is sensitive, and judging is accurate; the metal sheet is arranged in the cup body, is not in direct contact with air or the food, and thus is free of cleaning and reasonable in structure.

In an optical connector, end faces (11a) of a pair of ferrules (11) that hold multiple optical fibers (15) are positioned with two guide pins (14) and butted against each other to connect the optical fibers in the pair of ferrules. The optical connector is provided with an urging member for pushing the end faces (11a) against each other. The end faces (11a) are ground at an angle. The gap between the guide pins (14) and guide holes (12), which open at the end faces (11a) and into which the guide pins (14) are fitted, is larger than 0.004 mm and smaller than or equal to 0.008 mm. Powder caused by the friction generated when the guide pins (14) are inserted and fitted into the guide holes (12) is greatly reduced. Connection loss does not increase even when frequent connection and disconnection are performed, and cleaning the connector becomes unnecessary.

The invention relates to an anti-clogging aerator which comprises an upper bubble rectifying device, a middle bubble cutting device, a lower bubble cutting device and an air intake component, wherein the upper bubble rectifying device comprises a cowling, a rectifying plate and a funneled cowling transitional connection casing; the middle bubble cutting device comprises a middle casing, a middle cutting plate and a middle funneled transitional connection casing; the lower bubble cutting device comprises a lower casing and a lower cutting plate; the air intake component comprises an air inlet pipe, a cover body and a baffle plate. According to the invention, gas is smashed into bubbles through cutting holes in the gas and liquid mixing process, after being cut at each stage, the bubbles become smaller in size and are increased in number, meanwhile, the gas flow rate is lowered so as to enlarge the service area of the bubbles. Blowdown holes are formed in the lower casing and the lower part of the cover body, the cutting holes are formed in the cutting plates and are not blocked easily or required to be cleaned, and the use is not influenced even the cutting plates scale slightly. The anti-clogging aerator is simple in structure and convenient to operate; procedures for cleaning the aerator frequently are reduced, and the production efficiency is improved.

The invention discloses a quick hot melt glue gun. The quick hot melt glue gun comprises a gun body; and a glue rod, a hot melt device and a power supply module are arranged in the gun body. The quick hot melt glue gun is characterized in that the hot melt device includes at least one PTC ceramic heating piece, a negative pole connecting piece and an electric conduction heating head; a hot melt cavity is formed in the electric conduction heating head; the PTC ceramic heating piece is arranged out of the hot melt cavity, and the inner side of the PTC ceramic heating piece is tightly bonded on the electric conduction heating head; the PTC ceramic heating piece is electrically connected with a negative pole input end of the power supply module through the negative pole connecting piece; the electric conduction heating head is electrically connected with a positive pole input end of the power supply module; a leakage preventing rubber sleeve is arranged at the back end of the electric conduction heating head; a connecting concave cavity is formed in the back end of the electric conduction heating head; a connecting convex ring is arranged at the front end of the leakage preventing rubber sleeve, and extends into the connecting concave cavity; and a first conical through hole is formed in the front end of the leakage preventing rubber sleeve. The quick hot melt glue gun has the advantages of more direct heating effect and higher heating efficiency; and the glue rod can be smoothly extruded out in reuse, so that the use is convenient and fast.

The invention discloses a household garbage crushing, screening and drying integrated machine. The household garbage crushing, screening and drying integrated machine comprises a tooled roll extrusioncrusher (1), a roller type separating screen (2) and a sealing outer sleeve (3). The household garbage crushing, screening and drying integrated machine is characterized in that the roller type separating screen (2) is provided with a feeding port (2-1); a porous type circular body (2-4) is arranged on the outer wall of the roller type separating screen (2), the roller type separating screen (2)is internally provided with a material guiding plate (2-5), a sealing connector (2-3) is arranged at one end of the outer wall of the roller type separating screen (2), and the roller type separatingscreen (2) is connected with the feeding port (2-1) through the sealing connector (2-3); and the outer portion of the roller type separating screen (2) is provided with the sealing outer sleeve (3), and the outer portion of the sealing outer sleeve (3) is provided with a sliding track (3-1). The household garbage crushing, screening and drying integrated machine is small in equipment size, occupied area and infrastructure investment; the equipment energy consumption is low, and the work efficiency is high; and the fault rate is small, noncombustibles do not adhere to sieves, sieve hole blockage is avoided, and cleaning is avoided.

The invention discloses a high-efficiency mosquito eradication method and system. The high-efficiency mosquito eradication method comprises the following steps of: S1, collecting wing vibration sounds of female mosquitoes; S2, capturing a frequency band of the sounds and copying the frequency band; S3, arranging and playing the copied sounds to attract male mosquitoes; and S4, concentratedly eradicating the attracted male mosquitoes by using a mosquito eradication device. According to the invention, the sounds of the female mosquitoes are collected and then captured, copied and played to attract the male mosquitoes through utilizing the characteristics of opposite attracts and good hearing of the male mosquitoes, a large amount of male mosquitoes are concentratedly eradicated by the mosquito eradiation device, so that the progenitive speed of the female mosquitoes is reduced, and therefore the mosquito eradication progress is greatly accelerated.

The invention discloses a self-expanding mold for a reverse extruder. The reverse extruder comprises an extrusion cylinder and a die shaft, the self-expanding mold comprises an expanding ring which isapproximately cylindrical, has elasticity and comprises a first connecting part which is located at a first end of the expanding ring and used for being connected to a mold shaft, a sealing part which is located at an opposite second end of the expanding ring and has the outer diameter being slightly larger than that of the first connecting part, and a deformation part located between the first connecting part and the sealing part, a supporting ring which is arranged on an inner side of the expansion ring in a manner of being coaxial with the expansion ring, has a step shape matched with theshape of an inner surface of the expansion ring, and comprises a second connecting part, a conical end part used for being in close contact with a conical flaring of the expansion ring sealing part, and a middle step part, and a mold mounted on an inner side of the conical end part of the supporting ring. The invention further provides an assembling method of the self-expanding mold for the reverse extruder. The die can effectively prevent residual metal from being generated on the inner wall of the extrusion cylinder during metal extrusion.

The invention relates to the field of soil remediation, in particular to a crushing and repairing device for heavy metal soil. The device comprises a motor, a transmission shaft, an upper elastic grinding assembly, a lower elastic grinding assembly, a screening and filtering assembly and a sliding column. The upper elastic grinding assembly comprises an upper fixing outer ring, a plurality of upper elastic strips and an upper fixing inner ring, and the upper fixing outer ring is fixedly installed; the upper ends of the upper elastic strips are connected with the upper fixing outer ring, the lower ends are connected with the upper fixing inner ring, and the spiral direction of the projection in the horizontal plane from inside to outside is opposite to the rotating direction of the transmission shaft; the lower elastic grinding assembly comprises a lower fixing outer ring, a plurality of lower elastic strips and a lower fixing inner ring, and the lower fixing outer ring is rotatably arranged; the inner end of the sliding column is connected with the upper fixing inner ring, and the outer end is vertically slidably mounted on the lower fixing outer ring; the upper ends of the lower elastic strips are connected with the lower fixing outer ring, the lower ends are connected with the lower fixing inner ring, and the lower elastic strips and the upper elastic strips are opposite in rotation direction; stirring blocks are arranged in spaces defined by the upper elastic strips and the lower elastic strips; and the screening and filtering assembly is used for receiving and filtering the crushed soil.

The invention relates to the technical field of ship manufacturing, in particular to a ship which is integrally formed and a manufacturing method of the ship. A rotational moulding plastic ship comprises a ship body, and the ship body is a plastic ship which is made of plastic materials and is integrally formed through a rotational moulding technology. The plastic materials comprise polyolefin high polymer materials, PA nylon high polymer materials, HIPS high polymer materials, ABS high polymer materials, PMMA high polymer materials and PC high polymer materials. The ship body made of the plastic materials has the advantages of being good in strength, high in anti-impacting capacity, free of pollution, recyclable and the like.

The invention belongs to the field of doors and windows, and particularly relates to a ventilating window of a temperature-controlled bathroom. The ventilating window comprises a window body, a ventilating channel penetrating inside and outside is arranged on the window body, the ventilating channel, the outer side of which is high and the inner side of which is low is obliquely arranged, a powercavity and a transmission cavity are formed in the window body, the power cavity and the transmission cavity are separately located in the upper and lower sides of the ventilating channel, a slide block is slidably connected to the interior of the power cavity, the upper end of the slide block is fixedly connected to the side wall of the power cavity through a memory spring, the lower end of the slide block is fixedly connected to an active partition plate, the driving partition plate penetrates the ventilating channel and stretches into the transmission cavity, a storage groove is formed in the upper side of the ventilating channel, a driven partition plate is slidably and hermetically connected to the interior of the storage groove, a transmission mechanism is arranged in the transmission cavity, the driving partition plate and the driven partition plate are in transmission connection through the transmission mechanism, and a first vent hole and a second vent hole are separately formed in the driving partition plate and the driven partition plate. When the ventilating window is relatively high, the window is opened automatically to ventilate without being controlled manually, sothat the ventilating window is simple and convenient.

The invention provides multi-stage rice screening equipment. The multi-stage rice screening equipment comprises a power transmission device and a material screening device that are connected with eachother; the power transmission device comprises a main body rack as well as an eccentric slewing mechanism and a connecting bracket that are rotationally arranged on the main body rack; the multi-stage rice screening equipment is also provided with a motor and a gearbox; the material screening device comprises a vibrating bin, a separating screen and a rice discharging pipe; the separating screenis movably installed in the vibrating bin; and the eccentric slewing mechanism is driven to rotate by a power system so that the vibrating bin rotates to classify and screen the rice. The multi-stagerice screening equipment provided by the invention is simple in structure, convenient to use and stable in running; the multi-stage rice screening equipment provided by the invention is combined witha screening method to separate five grades of rice including intact rice, first-grade large broken rice, second-grade broken rice, intermediate-grade broken rice and small broken rice through continuous screening of different screening holes of four layers of separating sieves; the grading specification is standard; moreover, relatively light dust impurities in the rice are collected in a graded screening process; and thus a good dust removal effect is achieved, and the screening efficiency and quality are high.

The invention provides a compressor cylinder cover manufacturing and machining process. A work plate, two electric sliding blocks, an air conveying type movable plate, two clearing devices, two connecting rods, two sweeping devices, four extruding plates and four positioning blocks cooperate to complete work. According to the compressor cylinder cover manufacturing and machining process, the problems that when a cylinder cover is cleared, due to the fact that the upper end face of the compressor cylinder cover is uneven, many clearances exist, and the dead corners of the clearances are hard toclear through brushes; and when the brushes are used for sweeping, the positions of part of chips are just moved along with the positions of the brushes, the chips are not swept out and are still left in the clearances, the manual sweeping efficiency is low, the removal rate of the chips is not high, and the sweeping mode can hardly adapt to clearing in large-scale production are solved.

The invention discloses an iron-based flux-cored wire and a preparation method thereof. The flux core comprises the following components in percentage by mass: 2.5%-5% of silicon iron, 5%-7% of manganese powder, 0.8%-2% of chromium powder, 5%-15% of nickel powder, 0.5%-1.2% of molybdenum powder and the balance of iron powder. The iron-based flux-cored wire can reduce brittleness and martensite structure specific gravity of a heat-affected zone of a steel welding joint, can increase welding seam toughness storage, is used for 31Si2MnCrMoVE steel welding, and avoids welding cold cracks. The iron-based flux-cored wire has good welding processing property, and is free of a slag inclusion problem in a welding process; and a welding seam surface is smooth and flat, is not required to clear after being welded, and is high in deposition rate; and in comparison with a solid-cored welding wire, the production efficiency is improved by 1.2-1.5 times. The preparation method for the iron-based flux-cored wire is simple, convenient to operate, and suitable for batched production.

The invention provides a composite no-clean dust removal device, and belongs to the technical field of environmental protection equipment. The dust removal device comprises a tubular dust removal housing and a rotating shaft rotationally connected to the dust removal housing; a main air inlet pipe, a main air outlet pipe, an auxiliary air inlet pipe and an auxiliary air outlet pipe are connected to the side wall of the dust removal housing; the main air inlet pipe, the main air outlet pipe, the auxiliary air inlet pipe and the auxiliary air outlet pipe are circumferentially and uniformly arranged on the outer side of the dust removal housing; the main air inlet pipe and the main air outlet pipe are located on the same straight line, and the auxiliary air inlet pipe is communicated with themiddle of the main air inlet pipe through a bypass pipe; the air outlet end of the auxiliary air outlet pipe is connected with a filter bag; an arc-shaped filter screen with a first notch is fixedlyarranged on the rotating shaft, the arc-shaped angle of the filter screen ranges from 240 degrees to 340 degrees, and two arc-shaped baffles are arranged on the outer side of the filter screen; and the rotating shaft is connected with a driving mechanism capable of driving the rotating shaft to rotate. The device has the advantages of no need of cleaning the filter screen and the like.

The invention discloses a self-pressure-reducing type dissolved gas releaser for sewage treatment. The self-pressure-reducing type dissolved gas releaser comprises an introducing chamber and an outer barrel and is characterized in that the introducing chamber is arranged around the periphery of the bottom of the outer barrel, a hollow structure is formed by the introducing chamber and the bottom of the outer barrel, and a plurality of flow guide holes communicated with the bottom of the outer barrel are formed in the introducing chamber; a gas dissolved water introducing opening is formed in one side of the introducing chamber, a rotational flow head is mounted at the bottom of the outer barrel, a plurality of flow guide blades are evenly arranged at the bottom of the rotational flow head, space allowing the gas dissolved water to flow is arranged between the rotational flow head and the flow guide holes, and a gas dissolved water outlet is formed by the upper portion of the rotational flow head and an open part of the outer barrel. The self-pressure-reducing type dissolved gas releaser is simple in structure, released gas is fine, dense, even and stable, micro bubbles and suspended solids in water are attached well, floating is easy, and the releaser is not prone to be blocked and does not need to be cleaned during work.

The invention belongs to the technical field of industrial emulsion explosives, and particularly provides a rejected explosive product treatment device. Aiming at solving the problem of low treatmentefficiency of a rejected explosive product treatment device in the current market due to the fact that the emulsion explosives are block-shaped or flake-like and are directly placed in a stirrer for stirring and heating, the following scheme is proposed: the rejected explosive product treatment device comprises a smashing box, wherein a feeding hopper is fixedly connected with the upper surface ofthe smashing box, baffle plates are symmetrically and fixedly connected with the lower surface of the smashing box, a first rotating shaft is rotationally connected into the smashing box, a first smashing roller is fixedly connected with the outer wall of the first rotating shaft, and a hydraulic cylinder is fixedly connected with the inner wall of one side of the smashing box. According to the rejected explosive product treatment device, rejected products can be smashed and made to enter a stirring box to be sufficiently mixed, and the treatment efficiency of the rejected products can be improved.

The invention discloses a sealing test device for rocket engine valve production, and the device comprises a moving mechanism, a fixing mechanism, a storage mechanism and a control mechanism, and is characterized in that the fixing mechanism is mounted on the moving mechanism, the storage mechanism is mounted above the moving mechanism, and the control mechanism is fixed above the storage mechanism; the device also comprises a pressurization mechanism which is used for increasing the air pressure in the third fixed shell, a positioning mechanism and a detection mechanism; the pressurization mechanism is installed above the control mechanism, the positioning mechanism is arranged on one side of the control mechanism, and the detection mechanism is arranged on the side, away from the controlmechanism, of the positioning mechanism. By arranging the pressurizing mechanism, the air pressure in the third fixing shell is increased through the air inlet assembly, the sealing performance of the valve is judged by observing the height of the plastic ball, the inspection process is simple and convenient, and cleaning is not needed.