131results about How to "Reduced impact strength" patented technology

The invention provides salt-spray-resistant steel, a preparation method and application of the salt-spray-resistant steel. The salt-spray-resistant steel sequentially comprises an alloy matrix, a permeable layer and an anti-corrosion coating from inside to outside. The alloy matrix comprises an Fe element; the permeable layer comprises Fe, N and O elements; the anticorrosive coating covers at least the surface of the permeable layer. The steel has the characteristics of high strength and salt spray resistance, the binding force of the coating and a matrix is good, the thickness of the anti-corrosion coating is greatly reduced under the condition that the anti-corrosion requirement of the CX grade is met, the machinable performance of a workpiece is effectively improved, and the adverse effects that the workpiece meshing force is poor, and the surface is not uniform due to the thick coating are avoided.

The invention belongs to the technical field of ferrous metallurgy steelmaking, and particularly relates to a system and method for preventing surface recarburization of a continuous casting high-pulling-speed casting blank and a steel plate. Comprising an amplitude difference control module, a liquid slag layer adjusting module and a casting powder adding module. The amplitude difference control module is used for controlling the liquid level fluctuation amplitude difference of the crystallizer to be within a preset value; the liquid slag layer adjusting module is used for adjusting the thickness of a liquid slag layer in the casting powder to reach a set value; the covering slag adding module is used for adding covering slag to the edge of the crystallizer. According to the method, the liquid level fluctuation amplitude difference of the crystallizer and the thickness of the liquid slag layer are controlled within a certain range, meanwhile, the slag adding mode of the casting powder in the production process is reasonably adjusted, and therefore the problem that molten steel makes contact with a carbon-rich layer on the top of the liquid slag layer is effectively solved, and the production cost is reduced on the premise that continuous casting high-pulling-speed production is not affected. And recarburization on the surface layer of the casting blank can be prevented.

The invention relates to the technical field of shipbuilding, and discloses a marine methanol fuel storage tank with a liquid sloshing inhibiting function, which comprises a support frame, a fuel storage tank body is arranged at the top of the support frame, an observation window is arranged at the top of the fuel storage tank body, and a discharge port is formed in one side of the fuel storage tank body. A climbing ladder is arranged on one side of the fuel storage tank body, an arch-shaped plate is arranged at the bottom of the inner wall of the fuel storage tank body and is of an arch-shaped structure, multiple sets of circulation holes are formed in the surface of the arch-shaped plate, and a buffering assembly is arranged at the top of the arch-shaped plate. A hedging assembly is arranged on the inner wall of the fuel storage tank body. The buffer assembly is used for reducing the oscillation degree of liquid in the fuel storage tank body; the hedging assembly is used for counteracting the shaking amplitude of liquid in the fuel storage tank body. Compared with the prior art, the shaking strength of part of methanol liquid can be actively counteracted, and the collision strength of the methanol liquid to the inner wall of the fuel storage tank body is effectively reduced.

The invention discloses a filter material corona charged particle bed and a filtering method thereof. The electric particle bed comprises a particle bed shell, an air distribution device and a filtering layer filled with filter material particles, wherein the air distribution device and the filtering layer are sequentially arranged in the particle bed shell from bottom to top; the particle bed shell is provided with an air inlet located above the filter layer and an air outlet located below the air distribution device, a corona discharge electrode is horizontally buried in the filter layer, a grounding electrode is horizontally placed above the filter layer and below the air inlet, the corona discharge electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply, and the grounding electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply. The grounding electrode is connected with the grounding end of the high-voltage pulse switching power supply and a ground wire; a gap corona charge region is formed in a space between the corona discharge electrode and the grounding electrode; the electrostatic enhanced dust collector has the advantages that the charged filter material particles are utilized to generate strong electrostatic attraction on dust with charges opposite to the polarity of the charged filter material particles, the electrostatic enhanced filtering effect is improved, and the filtering efficiency is remarkably improved.

The utility model belongs to a bridge expansion device, and particularly relates to a low-noise reinforced cantilever expansion device. Comprising a main body structure and a water stop structure, the main body structure comprises a first cantilever plate and a second cantilever plate which are oppositely anchored in concrete structures on the two sides of the expansion joint and matched in shape at the adjacent positions, and the water stop structure is arranged in the expansion joint; and the adjoining part of the first cantilever plate and the second cantilever plate adopts a broken line shape and / or a curve in the same plane. The utility model effectively solves the problems in the prior art that the edge beam profile steel is difficult to bend and form, and the forming size is difficult to control. The device has the advantages of simple and reliable structure, easiness in molding and manufacturing, low production cost, low failure rate, long service life and the like.

The invention discloses a drainage and temperature neutralization control system of an underground gas storage. The structure comprises a lining layer and a sealing layer, wherein an outer ring drainage pipe network and an inner ring drainage pipe network are respectively arranged in the lining layer; inlet ends of the outer-ring drainage pipe and the inner-ring drainage pipe are communicated with a first main water pipe, outlet ends of the outer-ring drainage pipe and the inner-ring drainage pipe are communicated with a second main water pipe, and an inlet end of the first main water pipe is communicated with a first valve and a third valve communicated with the atmosphere; a reservoir with a heat preservation effect is arranged in the factory access tunnel, and a first water pump used for being communicated with the inlet end of the first valve is arranged in water of the reservoir; the outlet end of the second main water pipe is communicated with a second water pump, the outlet end of the second water pump is communicated with a second valve and a fourth valve, the outlet end of the fourth valve is arranged in the reservoir water, and the outlet end of the second valve extends to the ground. The anti-seepage drainage requirement of the underground chamber is met, and meanwhile the temperature change amplitude of the reinforced concrete lining and the sealing layer in the operation period is controlled.

The invention relates to the technical field of polymer synthesis and processing, in particular to a propylene / alpha-olefin copolymer as well as a preparation method and application thereof, and aims to solve the problems that the melting temperature of the propylene / alpha-olefin copolymer is relatively high, the melting range is relatively narrow, the toughness and the strength of a heat-sealing material cannot be effectively balanced and the like in the prior art. The invention relates to a propylene / alpha-olefin copolymer, the melting peak temperature of the propylene / alpha-olefin copolymer is 40-90 DEG C, the melting range width is 40-80 DEG C, and the melting peak number n (peak) and dH (100) of the propylene / alpha-olefin copolymer meet the following conditions: 6 < = n (peak) < = 20, and dH (100) = 0.

The utility model provides a lifting operation platform, which relates to the technical field of lifting operation platforms and comprises an adjustable fixing mechanism, one side of the outer wall of the adjustable fixing mechanism is fixedly connected with a lifting buffer mechanism, and the adjustable fixing mechanism comprises a lifting platform. According to the utility model, under the action of the adjustable fixing mechanism, the limiting baffle plate is movably connected with the fixing plate by utilizing the connecting shaft through the mutual matching of the limiting stop lever and the limiting baffle plate, and a plurality of adjusting holes are formed in one side of the outer wall of the fixing plate; the fixing mechanism can be adjusted according to the specification of each type of motorcycle or electric vehicle, the device can be suitable for most types of vehicles on the market, the production operation range of the whole device is expanded, the safety of workers during working is further improved through the stable fixing state, time and labor are saved in the adjusting mode, and the production efficiency is improved. And the production operation efficiency is improved.

The utility model discloses a planing-free head-dismounting type same-floor drainage and water collection structure, and relates to the technical field of buildings. A fixing base is installed at the bottom of the self-reinforcing water collecting barrel, a connector is integrally connected to the upper end of the self-reinforcing water collecting barrel, an upper water collecting plate is installed at the upper end of the connector, a sealed one-way valve is detachably connected into an inner hole of the upper water collecting plate, and a plurality of water inlet pipe bodies are connected to the outer side wall of the connector. An inclined water outlet pipe is connected to the outer upper side wall of the self-reinforcing water collecting barrel; the sealing type one-way valve is sealed with the inner side wall of the connector and the upper water collecting plate through the sealing rings, the phenomenon of water leakage is not prone to occurring, and the sealing type one-way valve is detachable and convenient to disassemble and maintain when blockage occurs; one-way water inflow is achieved through the one-way valve, and the phenomenon of water return caused by pipeline blockage is avoided; the water outlet pipe is arranged in an inclined mode, buffering is achieved in the water outlet process, noise is reduced, meanwhile, impact on the pipeline is reduced, and the service life is prolonged.

The utility model provides an electronic cigarette support with a limiting structure, which relates to the technical field of electronic cigarette supports and comprises a fixing base, a clamping block is slidably connected to the surface of the fixing base, a screw is in threaded connection between the clamping block and the fixing base, a fixing block is fixedly mounted on the surface of the screw, and the limiting structure is arranged on the fixing block. According to the air conditioner blade support, by arranging the fixing base, the clamping block, the screw rod, the fixing block, the limiting block, the rotating handle, an anti-slip strip and the containing frame structure, when the support is used, the support needs to be fixed to an air conditioner blade, when the support is fixed, the rotating handle needs to be held tightly with the hand, then the screw rod is rotated, the screw rod drives the clamping block to move downwards, and then the air conditioner blade is placed on the support. When the clamping block and the fixing base completely press the air conditioner ventilation blade, the support can be fixed to the air conditioner ventilation opening, the friction force among the fixing base, the clamping block and the air conditioner ventilation blade can be increased through the anti-slip strips, and the situation that an automobile bumps in the running process, and consequently the electronic cigarette support falls off is further prevented.

The utility model discloses an anti-bending circuit mainboard. The anti-bending circuit mainboard comprises a circuit board; the outer wall of the plug pin is fixedly connected with the outer wall of the circuit board; the utility model relates to the technical field of protection, when the external force is too large and the shell of the external equipment is bent, the bottom end of the connecting rod is fixed in the shell, the protective assembly is used for protecting the external impact, and the bottom of the protective assembly is fixedly connected with the outer wall of the circuit board. The bending resistance of the connecting part of the connecting plate and the connecting frame is smaller than that of the pin, the connecting part of the connecting plate and the connecting frame is broken after reaching the bending limit, and the circuit board is inserted into the external equipment only through the pin at the moment, so that compared with the traditional direct fixation, the circuit board is fixed more conveniently. According to the utility model, the external bending force can be transferred to the connecting frame, so that the connecting frame firstly bears the external force, and the circuit mainboard can be effectively prevented from being bent and broken.

This application discloses a rapid quenching device for flanges, relating to the technical field of metal heat treatment equipment. It includes: a fixed housing, partitions, guide plates, a buffer assembly, and a conveying assembly. The fixed housing is fixedly installed on the ground and has a liquid injection chamber inside. Liquid inlets and outlets are located on the periphery of the fixed housing. Four sets of partitions are vertically fixed within the liquid injection chamber, each set parallel to the periphery of the fixed housing. The upper end of the guide plate is fixedly connected to the upper end of the fixed housing, and the lower end of the guide plate is fixedly connected to the upper end of the partitions. Each guide plate and partition corresponds to a partition. Liquid passage holes are provided on both the guide plate and the partitions. The buffer assembly is rotatably mounted on the partitions, buffering flanges that slide off the partitions. The conveying assembly is fixedly installed in the liquid injection chamber and conveys the quenched flanges out of the liquid injection chamber. This application effectively reduces the problem of flange quenching devices being unsuitable for quenching a large number of flanges.

The utility model discloses a high-energy pipeline anti-throwing part, and relates to the technical field of high-energy pipeline protection devices. A plurality of steel wires are rotated and crossed based on a preset angle to form a U-shaped steel cable with the cross section being a spiral strand steel wire rope, the steel cable type U-shaped anti-throwing piece with high tensile strength and rigidity is obtained, and a buffering energy absorption layer is arranged on the periphery of the steel cable type U-shaped anti-throwing piece, so that when the high-energy pipeline anti-throwing piece is thrown and impacted by a high-energy pipeline, the high-energy pipeline is prevented from being thrown. According to the high-energy pipeline anti-throwing piece, the buffering energy absorption layer is used for absorbing throwing energy of the high-energy pipeline, the steel cable type U-shaped anti-throwing piece is prevented from being directly impacted, the impact strength borne by the steel cable type U-shaped anti-throwing piece is reduced, the tensile strength of the high-energy pipeline anti-throwing piece is improved, and therefore the protection effect on the high-energy pipeline is improved.

The utility model discloses a tray for a three-dimensional warehouse, and relates to the technical field of trays, the tray comprises a tray carrier main body, the tray carrier main body comprises a U-shaped framework formed by welding a plurality of square tubes, the bottom of the U-shaped framework is provided with a fork tooth channel, a steel skin layer is laid in a concave cavity of the U-shaped framework, and the fork tooth channel is provided with a fork tooth groove; and the surface of the skin layer is subjected to plastic spraying treatment. The structure is simple, abrasion of the U-shaped framework can be reduced in the using process, and the service life of the U-shaped framework can be prolonged by replacing the skin layer.

This invention provides a rotor lamination, a rotor structure, and a permanent magnet motor. The rotor lamination has: multiple magnetic slots, which are sequentially spaced along the circumference of the rotor lamination; multiple recesses, all located on the edge of the rotor lamination and sequentially spaced along the circumference of the rotor lamination, wherein at least a portion of any recess is located between two adjacent magnetic slots along the circumference of the rotor lamination; and multiple grooves, each corresponding to one of the recesses, wherein any groove is located at the bottom of its corresponding recess and is recessed towards the interior of the rotor lamination. The rotor structure of this invention solves the technical problem of easy breakage of the magnetic isolation bridge between adjacent magnetic poles in related technologies.

This application relates to the field of automotive technology, and more particularly to a method, apparatus, device, and storage medium for adjusting a model. The method includes: obtaining a first collision simulation result based on a whole-vehicle collision model of a vehicle; the first collision simulation result includes at least the impact force of a first barrier and a protective beam in the vertical direction and a first acceleration of the non-deformed position of the protective beam in the vertical direction; determining the equivalent mass that generates the impact force based on the impact force and the first acceleration; controlling a second barrier included in the simplified collision model to impact the protective beam included in the simplified collision model with the impact force based on a simplified collision model of the vehicle and the equivalent mass, thereby obtaining a second collision simulation result; determining a first distance based on the first collision simulation result; determining a second distance based on the second collision simulation result; and adjusting the simplified collision model based on the difference between the first distance and the second distance.

The present invention discloses a fan assembly with a noise reduction function, comprising a fan housing, a fan arranged in the fan housing, and an air duct having an air inlet and an air outlet and connected to the fan housing; at least two layers of silencing substrates are arranged in the air duct, which are spaced from each other and extend along the wind direction in the air duct, and the silencing substrate has a plurality of groups of silencing units continuously arranged along its extension direction, and a control mechanism is provided to control the protrusion degree of at least part of the silencing units relative to the silencing substrate, so that the silencing substrate is in a silencing state, and a plurality of groups of silencing units constitute a waveform structure that offsets noise sound waves. The present invention also discloses an integrated stove having the fan assembly, and a noise reduction control method based on the fan assembly. The beneficial effect of the present invention is that the waveform structure formed by the silencing substrate offsets the noise waveform, thereby achieving the effect of noise regulation.

This invention relates to the field of polymer materials technology, specifically to a permanent antistatic ABS composite material based on polyethylene polyamine-aminated carbon nanotubes, its preparation method, and its application. The method includes: Step 1, basicizing carbon nanotubes; Step 2, mixing carboxylated carbon nanotubes, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine, adding N,N-dimethylformamide solvent, and then adding polyethylene polyamine to obtain polyethylene polyamine-aminated carbon nanotubes; Step 3, grafting the polyethylene polyamine-aminated carbon nanotubes with a styrene-maleic anhydride copolymer to obtain styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes; Step 4, melting the styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes with ABS to obtain a permanently antistatic ABS composite material. This preparation method uses polyethylene polyamine to aminate carbon nanotubes, improving the antistatic effect and mechanical properties of the ABS composite material.

The utility model discloses a shell and tube condenser and an air conditioning system. The shell and tube condenser comprises a shell, an air inlet pipe and a plate, a heat exchange tube bundle is arranged in the shell, and at least one end, in the first direction, of the heat exchange tube bundle is connected with the shell; an end opening of one end of the air inlet pipe faces the side face of the heat exchange pipe bundle, and the air inlet pipe is used for filling a gas refrigerant into the shell so as to exchange heat with the heat exchange pipe bundle; the plate is arranged between an opening in one end of the air inlet pipe and the side face of the heat exchange tube bundle, the plate and the opening in the end of one end of the air inlet pipe are spaced, the plate is provided with a plurality of open holes, and the open holes are communicated with the side, facing the air inlet pipe, of the plate and the side, facing the heat exchange tube bundle, of the plate. At least one side edge in the circumferential direction of the plate is separated from the shell to form an opening area. The gas refrigerant is more uniformly distributed in the shell and tube condenser, and the heat exchange area of the heat exchange tube bundle can be more fully utilized.

The invention relates to the technical field of crown block anti-collision, in particular to a crown block anti-collision device which comprises a crown block body in sliding connection with tracks on the two sides. The control motors are symmetrically arranged on the inner side of the crown block body, and the outer sides of the output ends of the control motors are fixedly connected with traveling wheels abutting against the rails; a detector; the damping protection units are symmetrically arranged and are connected with the crown block body; the brake units are symmetrically arranged on the outer side of the crown block body, fixedly connected with the crown block body and arranged opposite to the track; wherein the shock absorption protection unit comprises an automatic control assembly, a mounting insertion assembly and a buffering energy absorption assembly, by arranging the shock absorption protection unit, parking of the crown block body can be completed in time during collision, impact force generated during collision can be effectively absorbed, damage to the crown block body caused by collision is avoided, and the service life of the crown block body is prolonged. And the buffering and energy-absorbing assembly can be automatically and quickly disassembled and assembled, so that the equipment is convenient to repair and maintain.

The utility model discloses an automatic folding driving platform of a cotton picker, which comprises a main frame, a lateral platform and a lateral guardrail, the lateral guardrail and the main frame are respectively and rotatably connected with two opposite sides of the lateral platform, the main frame is provided with a linear driving device which forms an included angle with the lateral platform, and the main frame is rotatably provided with a first connecting rod. Second connecting rods rotationally connected with the first connecting rods are fixedly arranged on the lateral guardrails, and the linear driving devices are rotationally connected with the main machine frame and the lateral platforms so that the linear driving devices can drive the lateral platforms to rotate relative to the main machine frame when linearly stretching out and drawing back. And the lateral platform drives the first connecting rod and the second connecting rod to rotate so as to realize synchronous folding or unfolding of the lateral platform and the lateral guardrail. The utility model has the advantages that the folding efficiency of the driving platform of the cotton picker is high, the transition time of the cotton picker is short, and the cotton picking efficiency can be improved.

The utility model relates to the technical field of crash barriers, in particular to an intelligent robot crash barrier which comprises an intelligent robot body, side grooves are formed in the periphery of the intelligent robot body, and two symmetrical longitudinal force unloading assemblies are installed in the side grooves. Extrusion assemblies slidably mounted in the side grooves are arranged on one sides of the two longitudinal force unloading assemblies correspondingly, two buffer assemblies are fixed between the two extrusion assemblies, and two positioning blocks slidably connected with the buffer assemblies in a sleeving mode are fixed to the inner walls of the tops and the bottoms of the side grooves correspondingly; the extrusion assembly comprises a vertical shaft fixed in the side groove, and two symmetrical damping cone blocks are arranged on the vertical shaft in a sleeving mode. According to the intelligent robot, part of transverse collision force can be subjected to vertical force unloading buffering work, the collision strength of the intelligent robot body in the horizontal direction is reduced, and the rebound effect is reduced.

The utility model relates to the technical field of pavement maintenance, in particular to an old municipal road milling device which comprises a movable frame, a lifting type milling mechanism is connected to the movable frame, a fixed plate is fixedly connected to the upper end of the interior of the movable frame, a baffle is rotatably connected to the bottom end of the fixed plate, and a spring is fixedly connected to the upper end of the baffle. One end of the spring is fixedly connected to the movable frame. Splashing particles collide with the elastic cushion, the elastic cushion reduces the collision strength between the particles and the baffle, the elastic cushion extrudes the baffle after being collided, the baffle extrudes the spring, the spring shrinks after being pressed, the baffle can rotate after the spring shrinks, and therefore the collision strength between the baffle and the particles is reduced; the baffle plate is used for blocking splashed particles, so that the particles generated by milling of the lifting type milling mechanism are prevented from being splashed out, and personnel injury is avoided.

The invention discloses a wind vibration resistant and fatigue resistant overhead insulated conductor, and relates to the technical field of insulated conductors, a plurality of anti-puncture metal sheets are laid on the inner side of an outer circle setting insulating sleeve at equal intervals, semicircular pressing belts are bonded to the inner sides of the anti-puncture metal sheets, and a plurality of weight reduction fixed supporting cavities are formed in the inner sides of the semicircular pressing belts at equal intervals; a plurality of biconvex elastic pieces are installed on the inner side of the weight reduction fixed supporting cavity at equal intervals, an external fixed internal resistance cooling fin is bonded to one end of the inner side of the semicircular press-fit belt, a plug-in card embedding groove is formed in one end of the external fixed internal resistance cooling fin, and a plug-in card embedding strip is installed at one end of the external fixed internal resistance cooling fin. According to the invention, through internal multi-position and all-directional energy absorption and buffering, the swing amplitude of the overhead insulated wire is slowed down, and the situation that a fixed joint of the overhead insulated wire is greatly damaged by friction due to large-amplitude swing and traction is avoided, so that the service life of the overhead insulated wire is prolonged, and the service life of the overhead insulated wire is prolonged. And the stability of overhead insulated wire installation and overhead support is ensured.

The present invention relates to the technical field of building structure construction, and in particular to a building structure that can increase the net height of a building and facilitate the installation of pipelines, wherein a plurality of main beams are fixedly arranged on the top of the support columns, the support columns are used to support the main beams, and secondary beams are fixedly arranged between the main beams; the top of the main beam protrudes upward from the upper surface of the structural plate to form an upper inverted beam of the main beam, and the upper inverted beam of the main beam is provided with an upper main cut-off channel for the pipelines on the plate to pass through; and a lower cut-off channel for the pipelines under the plate to pass through is provided below the structural plate. The beneficial effects of the present invention are as follows: by making the top of the main beam protrude from the upper surface of the structural plate, even if the height of the main beam under the structural plate is the same as that of the secondary beam, the strength and supporting force of the main beam can still be guaranteed; by setting the upper main cut-off channel, the pipelines on the plate can pass through easily, and by setting the lower cut-off channel, the pipelines under the plate can pass through easily, and the drainage of the upper surface of the structural plate can be facilitated.

The utility model relates to the technical field of flour processing equipment, in particular to a bag pusher for flour processing, which comprises a placing frame, a conveying device arranged on the right side of the placing frame, two baffles rotatably mounted on the right side surface of the placing frame, a buffer mechanism arranged on the right side of the placing frame, and a bag pushing mechanism arranged in the placing frame. The buffering mechanism comprises a buffering part, a connecting part and an adjusting part, the buffering mechanism is used for ensuring that the flour bag is not broken during dumping, and the bag pushing mechanism is used for pushing down the flour bag. When a flour bag is dumped to the conveying device, the flour bag firstly makes contact with a buffer plate, the buffer plate moves downwards under pressure and drives a hinge block to move, the hinge block drives a connecting rod to move, the connecting rod drives a connecting sleeve to move downwards, the connecting sleeve extrudes a spring, and the spring buffers the connecting sleeve; and therefore, the buffer plate buffers the flour bags, the collision strength between the flour bags and the conveying device is reduced, and it is guaranteed that the flour bags are not prone to breakage.

The invention discloses a protective cover, and relates to the technical field of automobile batteries, the protective cover comprises a main body, the main body is used for being arranged at a battery power supply interface, the main body is provided with a first side and a second side in a first horizontal direction, the second side is provided with an accommodating groove, the accommodating groove is used for accommodating the battery power supply interface, and the main body is provided with a second side. And the size of the main body in the vertical direction is gradually reduced from the second side to the first side. By arranging the protective cover main body, the direct power interface of the battery is prevented from being directly impacted, the power interface is protected in the protective cover main body, the damage to the power interface during the impact is reduced, and meanwhile, the height of the protective cover in the vertical direction is gradually reduced from the second side to the first side so as to guide the impact direction to deviate; therefore, after the protective cover main body is impacted, the impact strength released by the protective cover main body towards the battery is weakened, and the damage to the battery is reduced.

The application discloses a high-pressure structure fire-resistant breathing valve, which comprises a valve body, an exhalation channel and an inhalation channel are arranged in the valve body respectively, the exhalation channel and the inhalation channel are arranged independently, the exhalation channel and the inhalation channel are respectively provided with opening and closing valve assemblies, and the exhalation channel and the inhalation channel are respectively provided with an exhalation fire-resistant core and an inhalation fire-resistant core on the atmospheric side. The independent channel and the gradient fire-resistant structure design improve the adaptability of the breathing valve to high-pressure working conditions, reduce the influence of the fire-resistant structure blockage on the inhalation channel, and have the characteristics of reasonable structure, high safety and convenient maintenance.

The present invention discloses a vehicle-mounted hyperspectral imaging device, including a base, a telescopic member, a rotational drive mechanism and a hyperspectral imager, wherein the base is used to be installed on a luggage rack crossbar, the bottom end of the telescopic member is connected to the base and can rotate relative to the base in a vertical direction, the top end of the telescopic member is installed with a rotational drive mechanism, the hyperspectral imager is installed on the rotational drive mechanism, and the buffer mechanism includes a primary buffer component and a secondary buffer component, the primary buffer component and the secondary buffer component are used to buffer the telescopic rod in turn when the telescopic member is lowered from a vertical state to a horizontal state, and the secondary buffer component is also used to play a buffering role between the base and the telescopic member when the telescopic member is placed horizontally. In the present invention, multi-point measurement can be conveniently performed in the field, the measurement efficiency can be improved, and the problem that the hyperspectral imager is easily damaged due to bumps when applied to a car is overcome.

The present invention discloses a high-speed lightweight impeller and rotor, belonging to the technical field of impeller machinery. It includes a first split body and a second split body, the first split body includes a first hub, a first wheel disc and a first blade, the second split body includes a second hub, a second wheel disc and a second blade, the first wheel disc and the second wheel disc have a top end face and a bottom end face along the axial direction respectively, the radius of the top end face is smaller than the bottom end face, the top end face of the first wheel disc is consistent with the outer diameter of the bottom end face of the second wheel disc, and the first blade at the top end face of the first wheel disc is correspondingly connected with the second blade at the bottom end face of the second wheel disc. The present invention has the advantages of improving the stress concentration of the impeller, satisfying the rotor dynamics, and realizing its high-speed operation in a high-temperature environment.