198results about How to "No leaks" patented technology

The utility model belongs to the technical field of flue gas treatment and environmental protection, and particularly relates to a temperature control heat recovery type flue gas CO removal device which is characterized by comprising a flue gas standby heater, a flue gas pretreatment unit, a catalytic reaction unit, a solid waste recovery unit and a heat recovery temperature control system. A diffused gas induced draft fan is used as a power source, and smoke flows along the device from bottom to top and then is discharged to a chimney; the catalytic reaction unit comprises an upper bed layer and a lower bed layer, a first heat recovery layer is arranged behind the first catalytic bed layer, a second heat recovery layer is arranged behind the second catalytic bed layer, and each catalytic bed layer is filled with a plurality of layers of honeycomb type catalysts. The device has the beneficial effects that multi-layer catalysis, intelligent temperature control and no pollutant generation and leakage are realized, the configuration number and form of the catalytic beds can be flexibly adjusted according to the CO content in the flue gas, meanwhile, the reaction heat in the flue gas is further recycled, and finally, the cooperative treatment of pollution reduction and carbon removal is realized.

The invention relates to an electro-hydraulic actuator for a roll-on-roll-off ship springboard, which comprises a motor driving mechanism, a bidirectional hydraulic pump and a hydraulic cylinder, a position sensor in the hydraulic cylinder is mounted on an oil cylinder to send a signal to a piston rod, control the oil cylinder to stretch out and retract, and feed back a signal to control the stroke. A bidirectional oil inlet and an oil outlet of the bidirectional hydraulic pump are respectively connected with a piston and a piston rod of the oil cylinder; the closed oil tank comprises an oil filling port and a liquid level discharging port, is installed on the valve block and is kept on the same axis with the coupler and the motor. A motor in the motor driving mechanism directly controls and drives the bidirectional hydraulic pump to rotate forwards and backwards through an external power source, and therefore steering switching of oil supply and oil suction of the bidirectional hydraulic pump is achieved. The electro-hydraulic actuator adopts electrical-mechanical-hydraulic conversion. Compared with an existing actuator control scheme, the control efficiency is high, control is accurate, stretching and retracting can be achieved only through positive and negative rotation of a motor without valve control, and automatic control and upper computer online automatic operation can also be conducted.

The invention relates to a system and method for preventing a thick matter filter from being blocked during tar residue separation, the system comprises the thick matter filter arranged between a tar residue pre-separator and a tar squeezing pump, and further comprises an inlet flushing pipeline, an outlet flushing pipeline, a bottom back flushing pipeline, a first pressure sensor, a second pressure sensor and a control system; a hot ammonia water outlet of the inlet flushing pipeline is connected with an inlet tar pipeline, a hot ammonia water outlet of the outlet flushing pipeline is connected with an outlet tar pipeline, a first pressure sensor is arranged on the inlet tar pipeline, and a second pressure sensor is arranged on the outlet tar pipeline; and a hot ammonia water outlet of the bottom backwashing pipeline is connected with an emptying pipeline. By adopting various measures, the thick matter filter is effectively prevented from being blocked, and the device has the advantages of being easy to operate, high in automation degree, high in working reliability and the like, and has wide application prospects and market requirements.

The invention relates to multi-energy-field coupling chemical mechanical polishing equipment and method for a large-volume-aperture-ratio thin-wall semi-closed complex-structure part. Comprising a rack, a main shaft system, a polishing barrel, a multi-field triggering device and a numerical control system, the main shaft system is connected with a clamp used for clamping a to-be-polished piece, the main shaft system is used for adjusting the spatial position of a main shaft, so that the to-be-polished piece enters the polishing barrel and is immersed in polishing liquid, and the polishing barrel is used for containing chemical mechanical polishing liquid and magnetic grinding materials; the multi-field triggering device comprises at least one of an ultrasonic generator, a magnetic field generating device and a light source, and before machining, a preset amount of chemical mechanical polishing liquid and magnetic grinding materials are added into an inlet of the to-be-polished part, and the sealing state is kept in the polishing process. According to the method, chemical dissolution removal is taken as a main part, removal of an oxidation film and a passivation film by tiny abrasive particles under the action of fluid pressure is taken as an auxiliary part, the surface of a part is free of scratches, and the possibility that cracks and fatigue sources are generated by cyclic stress is eliminated.

The utility model provides a Roots vacuum pump sealing structure, which relates to the technical field of vacuum pumps and comprises a mounting pump body, an auxiliary exhaust component mounted in the mounting pump body, and pressure adjusting components mounted at the left end and the right end of the auxiliary exhaust component. Under the cooperation of the auxiliary exhaust assembly and the pressure adjusting assembly, when the exhaust valve plate is damaged and the air tightness detector detects that the exhaust air tightness is reduced, secondary exhaust adjustment is effectively formed through the structure, so that the whole device accurately controls and monitors the exhaust pressure of the vacuum pump, the air tightness is improved, and the service life of the vacuum pump is prolonged. And then the airtightness detector is in close contact with the surfaces of the exhaust communicating pipe plate and the two-way exhaust groove frame through the detection end, the airtightness of the exhaust system can be monitored in real time, it is ensured that no leakage exists, then the top of the exhaust communicating pipe plate communicates with a communicating exhaust pipe, and exhaust gas is guided to a designated exhaust point.

The invention relates to a liquid-gas mixed type rail vibration reduction fastener which comprises a rail bearing plate, a frame base, a vulcanized rubber structure, a bottom plate, an elastic unit and oil, the middle part of the rail bearing plate is sunken downwards to form a rail bearing groove, the rail bearing plate is sleeved with the frame base, and an open cavity is integrally defined through the vulcanized rubber structure. And the open cavity is filled with an elastic unit and oil and is hermetically connected with the bottom plate. According to the liquid-gas mixed type rail vibration reduction fastener, the installation requirement of a low-height rail is met, the vibration reduction effect is improved through the gas compression characteristic and the oil viscosity in a fluid medium, the rigidity and damping can be flexibly adjusted, and the running safety of a train is guaranteed through the vertical limiting design and the transverse anti-overturning design.

This utility model relates to the field of material pressing equipment technology and discloses a user-friendly material pressing machine, including a frame, a material barrel fixed on one side of the frame, a pressure plate inside the material barrel, and several first and second sealing rings installed on the outer side of the pressure plate through grooves. The first and second sealing rings are used to seal the gap between the material barrel and the pressure plate. A connecting plate is fixed on the top of the material barrel, and two cover plates are hinged to the top of the connecting plate. A hydraulic cylinder is provided on the top of the cover plate. The push rod of the hydraulic cylinder moves downward, thereby driving the pressure plate to move downward inside the material barrel to apply uniform pressure to the material, so that the material is effectively squeezed. Several first and second sealing rings are installed on the outer side of the pressure plate through grooves. The multiple sealing rings form a reliable high-pressure sealing barrier to ensure that the medium does not leak under high pressure, ensuring the sealing safety of the equipment in high-pressure, high-viscosity, and high-frequency operation scenarios, and enabling the equipment to operate stably under various complex and harsh working conditions.

The present invention belongs to the technical field of preparation of heat storage composite materials, and specifically relates to a self-repairing heat storage composite material and a preparation method thereof. The method of the present invention is to add an oil phase to an aqueous phase, mix them evenly, add a cross-linking agent, and gel the emulsion, that is, to prepare the heat storage composite material; the oil phase is a phase change material; the aqueous phase is a mixture of a water-soluble polymer and water; the volume ratio of the oil phase to the aqueous phase is about 0.4-1:1. The cross-linked structure of the self-repairing heat storage composite material described in the present invention is reversible, can self-repair damaged areas under external force damage, can be reused, the heat storage performance of the material does not change significantly, and the mechanical properties are excellent, which is better than most current heat storage composite materials.

The utility model relates to agricultural plant protection technical field discloses melon bacterial angular spot agent atomization precision pesticide application and mist drop recovery device, including collecting groove, the outside fixed connection of collecting groove has support frame, the top fixed connection of support frame has supply pipe, the inside fixed connection of support frame has the vine column, the outside fixed connection of supply pipe has atomization mechanism, the outside fixed connection of collecting groove has water pipe, the inside slide connection of collecting groove has quick -release locking mechanism, the atomization mechanism includes the connector, the outside fixed connection of upper half ring has pressure lock assembly. In the utility model, the setting of sealing rubber sheet and sealing rubber makes the device sealing effect better with pressure increase and ensures that there is no leakage in the use process, and the opening and closing design of upper half ring and lower half ring makes the replacement operation of atomization spray pipe more convenient, and adapts to the use demand under different scenes.

The utility model relates to the technical field of oil well liquid drainage, in particular to a negative pressure liquid drainage device. Comprising an upper connector, a sealing conical surface is formed in the upper connector, the lower end of the upper connector is fixedly and hermetically connected with an outer cylinder, the lower end of the outer cylinder is fixedly and hermetically connected with a lower connector, a piston blind plate is arranged in the lower connector, connected with the lower connector through a shear pin and in sealed contact with the upper connector, and a screen pipe is fixedly and hermetically connected in the lower end of the piston blind plate. The lower end of the screen pipe extends to the position below the lower connector and is blocked. The screen pipe and the piston blind plate are automatically released through fracture of the shear pin, external power or manual intervention is not needed, instant communication of a shaft and an oil pipe column is achieved, and the liquid drainage starting time is remarkably shortened.

This utility model relates to the field of non-ferrous metal casting technology, and in particular to an aluminum alloy casting crystallizer. It solves the problems of existing technologies that lack an externally interconnected and independently adjustable dual-channel water inlet structure, resulting in reliance on two independent water sources for dual-supply systems, low system integration, complex piping, and inconvenient maintenance. An aluminum alloy casting crystallizer includes an aluminum alloy casting crystallizer body and two water inlet pipes located on the top of one side of the aluminum alloy casting crystallizer body. A water supply pipe is located on one side of the aluminum alloy casting crystallizer body, with a top pipe and a bottom pipe at one end. The bottom pipe is connected to the bottom of the top pipe via a connecting pipe. This utility model achieves dual-channel water supply from a single water source through the interconnected top and bottom pipes, improving integration. The on / off state can be controlled by adjusting a screw, allowing for independent opening and closing of the channels, facilitating maintenance and ensuring continuous production.

The invention discloses a carbon foam / paraffin composite phase-change material for thermal management of a lithium ion battery and a preparation method and application of the carbon foam / paraffin composite phase-change material. Low-cost commercial melamine foam is used as a template to prepare carbon foam, and the carbon foam and paraffin are compounded through a vacuum impregnation process to obtain the carbon foam / paraffin composite phase-change material; wherein the carbon foam is prepared by heating and carbonizing melamine foam in a stepped manner under the protection of nitrogen, and the compounding of the paraffin and the carbon foam is realized by adopting vacuum impregnation. The problems that a traditional pure paraffin phase-change material is low in heat conductivity and prone to deformation and leakage, and a metal-based composite phase-change material is high in cost, large in density and prone to corrosion are solved, the prepared foamy carbon / paraffin composite phase-change material is low in density and cost, the heat conductivity is remarkably improved compared with that of pure paraffin, and the thermal stability is excellent within the working temperature range of a lithium ion battery. When the lithium ion battery is applied to thermal management of the lithium ion battery, the lithium ion battery can be maintained for a long time in a phase change temperature range, and an economical and efficient solution is provided for thermal management of batteries of electric vehicles and energy storage equipment.

The invention belongs to the technical field of underground structure construction, and discloses a sealing film structure which comprises a bag body and two sealing assemblies. The bag body comprises a middle expansion part and closed end parts arranged at the two ends of the middle expansion part, and the middle expansion part is provided with an opening used for feeding. The two sealing assemblies are arranged at the sealing ends of the two ends of the middle expansion part respectively, each sealing assembly comprises at least one pressing part and at least one sewing thread, the pressing parts and the sewing threads are arranged at intervals in the length direction of the bag body, and the pressing parts in each sealing assembly are located between the sewing threads and the middle expansion part; the pressing component comprises a plurality of pressing pieces, the pressing pieces are arranged at the closed end in the width direction of the bag body at intervals and press the closed end, and the sewing thread is sewn to the closed end in the width direction of the bag body. Through cooperative use of the pressing part and the sewing thread, it is guaranteed that the closed end is free of leakage during grouting, and the pressure bearing capacity is high.

The utility model relates to the technical field of piston rods, and discloses a spiral piston rod structure which comprises a piston rod and a piston installed on the piston rod, external threads are arranged on the outer side of one end of the piston rod, the other end of the piston rod is of a smooth structure, internal threads are arranged at one end of the inner side wall of the piston, and the other end of the inner side wall of the piston makes contact with the smooth face of the piston rod. A groove is formed in the outer side of one end of the piston, through holes are formed in the two sides of the inner side wall of the groove, a sealing ring is inserted into the groove, a cavity is formed in the sealing ring, the two sides of the inner side wall of the cavity are communicated with pipelines, and a diaphragm is fixedly connected into the cavity in the radial direction of the sealing ring. According to the utility model, hydraulic oil in the cylinder body enters the cavity, so that the sealing ring expands towards the side wall of the cylinder body to extrude the inner side wall of the cylinder body, and the leakage of the hydraulic oil from the outer side of the sealing ring is reduced; the hydraulic oil in the cavity enables the sealing ring to expand towards the side wall of the cylinder body, and a gap between the sealing ring and the cylinder body is eliminated.

The present invention discloses a secondary aluminum ash treatment and resource production process and equipment, and relates to the field of solid waste treatment technology, wherein the equipment includes a first reactor and a second reactor connected to each other, the first reactor and the second reactor are both connected to a reagent tank and a spray tower, the first reactor is connected to a gas storage tank through a first spray tower, the second reactor is connected to a chimney through a second spray tower, the first spray tower is connected to a liquid storage tank through a delivery pump, and the second reactor is connected to a crusher through a closed conveyor belt or a tunnel dryer. The present invention can solve the technical problems of the secondary aluminum ash treatment method in the prior art being simple and extensive, water-consuming and inefficient, high in energy consumption, waste gas and waste residue generated, and unable to be recycled, and has the advantages of being able to achieve harmless aluminum ash, adapting to different types of aluminum ash, and having higher process added value.

The application discloses a novel pressure air cylinder structure and belongs to the technical field of railway vehicle equipment, comprising an air cylinder body, a maintenance hole is formed in the end of the air cylinder body, a threaded flange seat is welded at the maintenance hole, and the maintenance hole is sealed by a set of bolts and a flange plate; a sealing gasket is arranged between the flange plate and the flange seat, and an elastic washer is arranged between the bolt and the flange plate; the detachable flange sealing structure is arranged at the end of the air cylinder, a maintenance channel convenient for construction and maintenance is formed, high-performance protective coating spraying can be implemented on the inside of the air cylinder, the corrosion resistance is improved, the internal corrosion problem of the air cylinder is effectively solved, and the service life and operation safety and reliability of the product are remarkably improved.

The invention discloses a preparation method of a composite phase change fiber, the composite phase change fiber and application of the composite phase change fiber, and the preparation method comprises the following steps: (1) adding octadecane microcapsules into an aqueous solution containing sodium alginate, and stirring I to obtain a solution I; (2) adding graphene nanosheets into the solution I obtained in the step (1), stirring II to obtain a spinning solution, and standing; and (3) putting the standing spinning solution obtained in the step (2) into a wet spinning device for wet spinning, and drying to obtain the composite phase change fiber, wherein in the wet spinning device, an outlet at the tail end of a spinning head is arranged in a coagulating bath. The process condition requirement is low, and the prepared phase change fiber is linear, has the characteristics of no leakage, high heat storage density, no toxicity, good flexibility, excellent light absorption performance and the like, can adjust the enthalpy value, and has a great prospect in the field of human body heat management.

A bag type water pressure test device is characterized in that an inner bag and an outer bag are sequentially arranged from inside to outside along a drill hole, a gap is reserved between the inner bag and the outer bag, fixed sealing joints are mounted at two ends of the inner bag and the outer bag, and the sealing joint, close to the outer side of the drill hole, of the outer bag is connected with a high-pressure water inlet pipe and a section of steel pipe; the other end of the high-pressure water inlet pipe is connected with the pump body; one end of the steel pipe is connected with the first liquid injection pipe, the other end of the steel pipe is connected with the pump body through the high-pressure hose, and the other ends of the first liquid injection pipe and the second liquid injection pipe penetrate through the outer bag and extend into the inner bag; first liquid outlets are uniformly distributed in the first liquid injection pipe between the inner and outer side bags, second liquid outlets are formed in the first liquid injection pipe in the inner and outer side bags, and third liquid outlets are formed in the second liquid injection pipe in the inner side bag; and water swelling materials are filled in the inner and outer side bags. Through the arrangement of the inner bag and the outer bag and the communication of the high-pressure water pipe, efficient hole sealing can be achieved.

The invention relates to a dry-type variable-lead double-screw vacuum pump which comprises a main screw, an auxiliary screw, a double-row angular contact ball bearing and a vacuum breaking silencing assembly. And a mechanical sealing ring I and a mechanical sealing ring II are respectively arranged on a front shaft and a rear shaft of the main screw rod. The completely-sealed screw end face molded line is a completely-sealed screw end face molded line of brand new design, it is ensured that a pump body is free of leakage in the operation process, the working efficiency is improved, the service life is prolonged, the sealing performance is enhanced through a unique sealing structure, the maintenance cost is greatly reduced, and the service life of the pump body is prolonged. According to the optimized design of the end face profile of the screw, through a precise machining process, higher machining precision and matching degree are achieved, it is ensured that the stable sealing effect can still be kept under the conditions of high rotating speed and high load, and friction loss and energy consumption are reduced to the maximum extent.

The utility model relates to the field of electronic cigarette discloses an air switch air channel structure of preventing condensate, including zinc alloy shell, PCB assembly, air adjusting device, POD oil storehouse base and data line storage mechanism, data line storage mechanism includes fixed box, the fixed box in top end fixed setting has micro motor, the micro motor output fixedly covers and sets up one no. In the utility model, the data line does not need to be carried additionally, the problem that traditional data line is lost or forgotten can be effectively avoided, after charging, the micro motor can be started to wind the data line neatly back to the outer end of the first binding roller.

The utility model relates to the technical field of latex powder conveying, and discloses a latex powder conveying device which comprises a movable base, a conveying pipe and an auger, the left end of the conveying pipe is fixedly connected with a motor, the top end of the left end of the conveying pipe is fixedly connected with a discharging hopper, and the middle of the conveying pipe is fixedly connected with a lantern ring. Auxiliary rods are fixedly connected to the front side and the rear side of the lantern ring correspondingly, a rack rod is rotatably connected to the bottom end of the lantern ring, a sleeve frame is slidably connected to the outer portions of the auxiliary rods, a protective shell is fixedly connected to the top end of the sleeve frame, a rocker is rotatably connected to the middle of the protective shell, and a driving gear is fixedly connected to the middle of the outer portion of the rocker. And the middle part of the protective shell is rotationally connected with a connecting shaft. According to the device, the height of the device can be easily adjusted in a labor-saving mode, and meanwhile the device has the functions of effectively buffering vibration and protecting the device in the operation process.

The application belongs to the technical field of ship wind power boosting, and relates to a rotating cylinder wind sail deicing system based on a fluid rotary joint and a control method. The system uses the waste heat generated by the cylinder sleeve water of a ship main engine or a waste gas boiler as a heat source, and through a closed circulation loop, fluid medium is introduced into a high-speed rotating rotating cylinder internal spiral pipe or a sandwich flow channel through a multi-channel fluid rotary joint, so that the cylinder wall surface is uniformly heated. The system adopts a coaxial rotary joint structure of "inner pipe inflow and outer pipe backflow", cooperates with a balanced end face seal and an O-shaped ring to ensure leak-free transmission, and integrates environmental temperature and humidity, infrared cylinder wall temperature and vibration sensors, and switches the ice prevention, deicing and shutdown blowing modes intelligently by a PLC. The application discards high-energy-consumption electric heating slip rings, realizes zero additional power consumption, intrinsic safety and high-reliability ice prevention and deicing, significantly improves the ship energy efficiency index, and is suitable for cold region navigation scenes such as oil tankers and polar ships.

The invention discloses a high-stability liquid pumping device for contact lens care solution production, and relates to the technical field of care solution pumping, the high-stability liquid pumping device comprises a plurality of transportation assemblies, each transportation assembly is provided with a liquid discharging assembly, one liquid discharging assembly is provided with a pumping assembly, and each transportation assembly comprises two symmetrically arranged supporting brackets. According to the high-stability liquid pumping device for contact lens care solution production, through the pressure relief assembly, a motor in the pressure relief assembly drives a hollow column to synchronously rotate, an open groove is used for continuously conveying care solution, the conveying efficiency is guaranteed, meanwhile, instantaneous impact force generated by an infusion pump is counteracted, efficient pressure relief is achieved, and the production efficiency is improved. The position of the adjusting plate is adjusted through magnetic repulsive force of the electromagnetic block and the permanent magnet block, the effective liquid containing space of the open groove can be flexibly changed, the liquid feeding speed requirements of containers with different capacities are met, filling sputtering of a small-capacity container is avoided, the filling efficiency of a large-capacity container is guaranteed, and the production loss of the care solution is remarkably reduced.

The utility model relates to the technical field of proportional control valves, in particular to a multipurpose proportional control valve. The oil return valve comprises a valve block, an ascending module and a descending module are installed on the valve block, and the valve block is provided with a pressure oil channel used for oil feeding, a first oil return channel used for oil returning and a second oil return channel used for oil returning. The rising module comprises an electromagnetic rising proportional valve and a pressure compensation valve which are integrally installed, one end of the rising proportional valve is connected to a pressure oil channel, the other end of the rising proportional valve is connected to an execution channel used for being connected with an oil cylinder, and the rear portion of the rising proportional valve is connected with a one-way valve module; the descending module comprises an electromagnetic descending proportional valve, the outlet end of the descending proportional valve is connected to the second oil return channel, and the descending proportional valve is further provided with an overflow valve module in parallel. The ascending module, the descending module, the overflow valve module and the one-way valve module are combined, the structure is compact, and the whole machine can be conveniently arranged under the condition that the space of a walking machine is limited.

The present invention discloses a filtering device for separating impurities from liquid, comprising a box body, wherein a first support plate and a second support plate are fixedly disposed up and down in the box body, wherein an intermittently rotating support column is penetrated on the second support plate, wherein a mounting block is fixedly disposed on the upper end of the support column, wherein two shafts capable of being reset are rotatably connected to the mounting block, wherein a supporting ring is fixedly disposed at the opposite ends of the two shafts, wherein the reflux pipe and the sewage pipe are respectively disposed opposite to two filter cartridges, wherein a first piston cylinder is mounted on the first support plate, and the end of the first piston cylinder is fixedly sealed by a sealing plate. The present invention sets two filter cartridges for alternating use, wherein the filter membrane in the other filter cartridge can be backwashed while filtering the liquid, thereby avoiding the disadvantage that the filter membrane can only be cleaned by closing the filter mechanism in the prior art, thereby reducing the efficiency of liquid filtration and increasing the workload of the staff.

The utility model discloses an air chamber cooling device for an air quality monitoring system sensor. The air chamber cooling device comprises a heat insulation part, a heat dissipation mechanism, an electronic refrigeration mechanism, a controller, a temperature detection mechanism and an air chamber, the heat insulation part is arranged on the air chamber and used for guaranteeing the temperature difference inside and outside the air chamber. The cold end of the electronic refrigeration mechanism is connected with the outer wall of the air chamber, and the hot end of the electronic refrigeration mechanism is connected with the heat dissipation mechanism; the temperature detection mechanism is arranged on the air chamber and is used for measuring the temperature of the air chamber and transmitting temperature information to the controller; the corresponding ends of the controller are electrically connected with the corresponding ends of the temperature detection mechanism, the heat dissipation mechanism and the electronic refrigeration mechanism. According to the device for reducing the temperature of the air chamber in the high-temperature environment in an electronic refrigeration mode, the device is provided with the temperature sensor and the controller, the temperature of the air chamber can be detected, and starting or stopping of electronic refrigeration can be determined according to the set temperature.

This utility model discloses a boiler flue gas dust removal and desulfurization device, belonging to the field of flue gas purification technology. It includes a desulfurization and dust removal tower, a mounting base hood movably installed at the bottom of the tower, a desulfurization module located inside the tower, and a dust removal module mounted on the mounting base hood. The tower has an exhaust port at its upper end. The dust removal module on the mounting base hood performs graded filtration and removal, significantly improving the overall dust removal effect. The boiler flue gas after dust removal forms a counter-current with the downward-falling absorbent liquid, greatly increasing the contact area and contact time between the absorbent liquid and the flue gas, thus significantly improving the desulfurization effect. The desulfurization and dust removal tower and the mounting base hood are movably connected, with sealing components to ensure no leakage of flue gas and residual liquid, and to facilitate quick separation for replacing the suction strip or cleaning the dust removal screen, improving maintenance efficiency.

The application discloses an aero-engine test stand injection system and a regulating method, relates to the technical field of aero-engine test stands, and solves the problem that the test stand injection system is difficult to adapt to the change of exhaust characteristics and test working conditions of different types of engines. The first-stage injection pipe, the second-stage injection pipe and the third-stage injection pipe are sequentially and slidably arranged on the slide rail, and the distance between the first-stage injection pipe, the second-stage injection pipe and the third-stage injection pipe is adjusted by the distance adjusting device; the inlet end of the first-stage injection pipe is detachably provided with a replaceable flow guide cover, the replaceable flow guide cover is provided with a flow guide block, and the flow guide block is provided with a nozzle; and the inlet end of the second-stage injection pipe and the third-stage injection pipe is provided with a flow guide cover. The application is designed in cooperation with the modular replaceable flow guide cover and the multi-stage dynamic adjustable injection pipe, and realizes the self-adaptive matching of the injection system to different engine exhaust flow, temperature and pressure.

The application provides a packer, which comprises a packer body, an expansion cone sleeved on the packer body and internally connected with the packer body through a first sealing element, an expansion sleeve connected on a tapered part of the expansion cone, the expansion sleeve being provided with a second sealing structure for sealingly connecting an outer sleeve in operation, a support sleeve having one end connected with and supporting one end of the expansion sleeve and the other end connected with the packer body in a direction away from the expansion cone, and a locking ring fixedly connected with the support sleeve and locking the support sleeve on the packer body. The packer is resistant to high temperature and high pressure, has good adaptability to the sleeve, and has good anti-suction and energy storage and tightening effects.

This invention discloses a sterilizer, relating to the field of environmental treatment, comprising a main fan, a return air duct, a first outlet air duct, a vaporization chamber, and a second outlet air duct. The air inlet of the main fan is connected to the end opening of the return air duct, and the air outlet of the main fan is connected to the beginning opening of the first outlet air duct. The end opening of the first outlet air duct is connected to the air inlet of the vaporization chamber, and the air outlet of the vaporization chamber is connected to the beginning opening of the second outlet air duct. The vaporization chamber is equipped with a dual-fluid atomizing nozzle and a heater, and also includes a disinfectant storage tank, a metering pump, and an air pump. The inlet of the metering pump is connected to the disinfectant storage tank, the outlet of the metering pump is connected to the supply port of the dual-fluid atomizing nozzle, and the air outlet of the air pump is connected to the supply port of the dual-fluid atomizing nozzle. It achieves sterilization of the entire internal cavity without blind spots or dead angles, achieving a kill rate of up to 99.9999% for target microorganisms. It has a compact structure and strong versatility, and can be used for sterilization of closed equipment as well as room sterilization, meeting the relevant requirements of biosafety laboratories.