30results about How to "Increase flow resistance" patented technology

This invention provides a coolant flow channel plate, relating to the technical field of vehicle thermal management. It includes a cover plate fixed to the top of a main board, with the main board and cover plate welded together at their side edges to form an internal flow channel cavity. The cover plate has refrigeration unit inlet / outlet assemblies on its surface. The main board has, from left to right, a heater pump mounting port, a battery pump mounting port, and a motor pump mounting port. The circuits between the heater pump and battery pump mounting ports, and between the heater pump and motor pump mounting ports, within the internal flow channel cavity are each equipped with a first anti-heat-spreading section. The circuit between the motor pump and battery pump mounting ports forms a variable-diameter section, with a second anti-heat-spreading section at its front end. A guide section is provided on the circuit of the battery pump mounting port. This invention solves the problem of lacking anti-heat-spreading structures at the connection points of circuits in different temperature ranges, achieving the technical effects of reducing vehicle weight, reducing vehicle connection piping, reducing heat loss in the thermal management system, and improving thermal management efficiency.

This invention discloses a continuous adsorption-desorption treatment device for organic waste gas, relating to the field of environmental engineering construction technology. It includes: a support, on which multiple alternating treatment modules for treating organic waste gas are mounted; each treatment module includes: a treatment cylinder fixed to the support, an inner cylinder fixed inside the treatment cylinder, a main support mesh and multiple secondary support meshes fixed inside the inner cylinder, the main support mesh being located below all the secondary support meshes, and an activated carbon layer placed on the upper side of both the main and secondary support meshes, with gaps between the secondary support meshes and the activated carbon layer below them; and arc-shaped through holes at positions corresponding to these gaps on the inner cylinder. This invention utilizes the arc-shaped through holes to provide an additional flow path for the desorbed gas, allowing it to directly pass over the already desorbed activated carbon, reducing heat exchange between the desorbed gas and the desorbed activated carbon, thereby reducing heat loss and improving desorption efficiency.

The application relates to the technical field of sealing joints, in particular to a sealing joint for a high-pressure hydrogen gas conveying pipeline, which comprises a male connector seat, a female connector seat and a valve core group, the joint ends of the male connector seat and the female connector seat are respectively provided with lock plates and flange joint plates, the outer periphery of the flange joint plate is provided with wedge locking blocks and screw rods, the opposite surfaces of the lock plate and the flange joint plate are respectively provided with first sealing ring groups and second sealing ring groups, the surface of the lock plate is provided with a sealing gasket, the valve core group comprises a core shaft, a spring, a valve sleeve and a guide head, and a gradually tapered section, a throat section and a gradually expanded section flow channel structure are formed between the valve sleeve and a flow channel. The male connector seat and the female connector seat are quickly locked and connected through the wedge locking blocks, a composite sealing structure is formed through labyrinth sealing and elastic sealing, the static pressure of a joint jointing area is reduced through the Venturi effect, the hydrogen gas leakage driving force is reduced, a multilayer leakage prevention mechanism is formed, and the sealing joint has the advantages of good sealing performance, high connection stability and suitability for high-pressure hydrogen gas conveying working conditions.

The application discloses a novel fuel cell graphite bipolar plate with anti-overflowing glue, wherein the inner and outer sides of the sealing groove structure are provided with first glue overflow grooves parallel to the sealing groove; the inner side of the bipolar plate edge is provided with a second glue overflow groove; the second glue overflow groove surrounds the bipolar plate edge; a third glue overflow groove is arranged between the first glue overflow groove on the outer side of the sealing groove and the second glue overflow groove and close to the bipolar plate edge; a fourth glue overflow groove is arranged between the second glue overflow groove and the bipolar plate edge; one end of the fourth glue overflow groove is communicated with the second glue overflow groove, and the other end is provided with a glue overflow opening; the first glue overflow groove, the third glue overflow groove, the second glue overflow groove and the fourth glue overflow groove form a buffer extension path; when the excess glue passes through the glue overflow grooves, the flow resistance is increased, and the glue discharge speed is significantly slowed down. This avoids the rapid flow of the glue out of the bipolar plate, reduces the pollution of the glue overflow to the production environment and other components, and reduces the production interruption and material waste caused by cleaning the glue overflow.

This invention provides a method for determining the oil level of a compressor and an air conditioning system. The compressor has an oil sump, and a throttling element and a liquid temperature sensor are sequentially installed at the outlet of the oil sump. The liquid temperature sensor is used to measure the temperature Tk of the fluid flowing out of the oil sump after being throttled by the throttling element. The method includes: acquiring the compressor's high-pressure Ph, low-pressure Ps, discharge temperature Tp, and fluid temperature Tk; determining the compression ratio Px based on the high-pressure Ph and low-pressure Ps; calculating the predicted oil temperature Tkcal of the compressor based on the compression ratio Px, discharge temperature Tp, and low-pressure Ps; calculating the difference ΔT between the predicted oil temperature Tkcal and the fluid temperature Tk, and comparing the difference ΔT with preset dynamic parameters; and determining whether the compressor's oil level is qualified based on the comparison result of the difference ΔT and the dynamic parameters. The control method of this application is simple, convenient, reduces manual intervention, and has high accuracy.

The application discloses a zinc-bromine single liquid flow battery and belongs to the technical field of liquid flow battery energy storage, wherein the zinc-bromine single liquid flow battery is a single battery or a battery pack formed by connecting two or more single batteries in series, and the single battery mainly comprises a negative electrode frame, a negative carbon felt electrode arranged in a through hole in the middle of the negative electrode frame, a diaphragm, a positive carbon felt electrode arranged in a through hole in the middle of a positive electrode frame and the positive electrode frame which are sequentially stacked. The application reduces the flow radius of the electrolyte inlet flow channel, the inlet distribution flow channel, the outlet flow channel and the outlet distribution flow channel of the positive electrode frame, increases the flow resistance of the positive electrode frame, and solves the problems of low coulomb efficiency and short cycle life of the zinc-bromine single liquid flow battery caused by the expansion of the positive bromine during the operation of the zinc-bromine single liquid flow battery.

The present application relates to a kind of sintering machine composite side sealing device, the present application is provided with two sealing structures in the side of sintering machine, respectively contact type equidistant slide sealing assembly and telescopic spring support plate contact sealing assembly.Equidistant slide sealing assembly of contact type relies on the mutual cooperation between upper and lower slide structure, forms close horizontal surface contact and circuitous labyrinth structure, can change the flow direction of wind, increase the flow resistance of wind.Telescopic spring support plate contact sealing assembly mainly relies on spring compression to make sealing plate and L type plate surface close contact, in the sintering process, L type plate is moving, in order to reduce the friction of contact surface, a self-lubricating system is designed, so that the contact surface is in lubricated state, can reduce wear, prolong the service life of device.Therefore, the whole side sealing device has higher practical value.

This application relates to a heat exchanger and a thermal management system. The heat exchanger includes a flow guide plate with first flow guide grooves. Adjacent first flow guide grooves form multiple flow splitting gaps. The first flow guide groove is formed by either a straight groove segment or a curved groove segment alone, or by alternating arrangements of both. The straight groove segment includes multiple staggered channels connected sequentially along its own centerline, with adjacent staggered channels arranged in a direction perpendicular to the centerline of the straight groove segment. The flow guide plate also has multiple second flow guide grooves and flow guide protrusions. The flow guide protrusions divide the area of ​​the cold flow channel layer between the first and second flow guide grooves into multiple flow guide channels. The flow area of ​​the flow guide channels, the flow area of ​​the first flow guide groove, and the flow area of ​​the second flow guide groove are all equal. The heat exchanger and thermal management system provided by this application solve the problem of thermal stress concentration in the heat exchanger caused by inconsistent heat exchange effects at different locations in the cold flow channel layer.

The invention discloses a noise reduction structure and a range hood comprising the noise reduction structure, the noise reduction structure is arranged in a case of a fan system, the noise reduction structure is arranged at a volute tongue of a volute of the fan system, the noise reduction structure is provided with a noise reduction cavity in a penetrating mode in the axial direction of the volute, and the noise reduction cavity is communicated with the volute tongue of the volute. The noise reduction cavity communicates with the first air inlet area and the second air inlet area of the volute, and the cross section area of a cavity of the noise reduction cavity accounts for 20%-35% of the cross section area of the noise reduction structure. The noise reduction structure is arranged at the volute tongue, so that the operation noise of the fan system is reduced. By arranging the noise reduction cavity, the first air inlet area and the second air inlet area are communicated through the noise reduction cavity, the flowing resistance of airflow is improved, the adverse effect of the noise reduction structure on the flowing state in the case is weakened, and the inner wall of the noise reduction cavity can also be used for absorbing noise; in this way, the noise reduction effect is improved, and the aerodynamic performance of the fan system is guaranteed by increasing the sound absorption area of the noise reduction structure.

The anti-recoil device comprises a shell, a first braking cavity, a second counter-recoil cavity and a third counter-recoil cavity, the shell is installed at the top of a gun barrel, the first braking cavity is formed in the middle of the shell, and the second counter-recoil cavity and the third counter-recoil cavity which are located on the left side and the right side of the first braking cavity respectively are formed in the shell. Traveling pistons are arranged on the inner sides of the second counter-recoil cavity and the third counter-recoil cavity; a pull rod piston is arranged on the inner side of the first braking cavity, a first recoil valve and a first counter-recoil valve are arranged between the first braking cavity and the second counter-recoil cavity, a second recoil valve and a second counter-recoil valve are arranged between the first braking cavity and the third counter-recoil cavity, and inclined partition plates are arranged on the inner side of the second counter-recoil cavity and the inner side of the third counter-recoil cavity. The anti-recoil device of the artillery is arranged at the top of the artillery barrel, so that the torsion of the artillery carriage during recoil and counter-recoil of the artillery is reduced, the deviation degree of an aiming line is reduced, and the continuous shooting of the artillery is facilitated.

The present application relates to the technical field of marine fishery, and particularly relates to a marine ranch. The marine ranch is configured with a fishery platform with one end fixed to the seabed and the other end above the sea level to resist wind and waves and improve the overall current resistance of the marine ranch. The fishery platform encloses a hollow ranch, and a track is arranged in the hollow ranch to divide the hollow ranch into a plurality of breeding areas. The current in the hollow ranch enclosed by the fishery platform is stable, and a HDPE net cage with low cost, good flexibility and corrosion resistance is used as a breeding cage for breeding operation to control the breeding cost. The part of the fishery platform above the sea level can resist the impact of the current, so that the breeding cage is not directly impacted by the wind and waves, and deformation or damage of the breeding cage is avoided, so that the overall marine ranch has improved resistance to waves and current, and is suitable for popularization and use.

This invention belongs to the field of radial turbines, specifically relating to a leakage prevention structure and a radial turbine. One leakage prevention structure includes a first inlet pipe, a first outlet pipe, and a second outlet pipe; the outlet of the first inlet pipe is connected to the inlet of the first outlet pipe and the inlet of the second outlet pipe, respectively; the leakage prevention structure is installed at the tip of the moving blade, allowing pressure-side fluid to enter the first inlet pipe, fluid ejected from the first outlet pipe to act within the gap, and fluid ejected from the second outlet pipe to act on the suction side. The leakage prevention structure of this invention can introduce pressure-side fluid into the gap and suction side, thereby reducing blade load; on the other hand, the fluid flowing into the gap significantly increases the leakage flow resistance, reducing the leakage flow rate; the fluid flowing into the suction side impacts the leakage vortex, weakening the leakage vortex intensity and further reducing the leakage flow rate; thus, it has the effect of weakening the leakage vortex intensity, reducing losses, and improving turbine efficiency.

The utility model relates to the technical field of engineering geology drilling, and discloses an engineering geology drilling plugging device which comprises a sleeve, an inner pipe is slidably connected into the sleeve, a first piston rod is fixedly connected to the bottom end of the inner pipe, a first piston is connected to the bottom end of the first piston rod, and a first cylinder is connected to the outer surface of the first piston in a sleeved mode. The bottom end of the first barrel is in threaded connection with a bent pipe, one end of the bent pipe is fixedly connected with a first rubber sleeve, the outer surface of the sleeve is in threaded connection with a barrel connector, and one end of the barrel connector is fixedly connected with a second barrel. The rubber sleeve is hydraulically driven to expand to be attached to the inner wall of a drill hole, an upper sealing area and a lower sealing area are formed, leakage stopping agents can be effectively prevented from overflowing from a gap between the sleeve and the hole wall, material waste is reduced, and leakage stopping efficiency is improved; and through the matching design of the spring pre-tightening force and the pumping pressure, it is ensured that the sealing and discharging processes are accurately started after the device reaches the preset pressure, and the situation that the leaking stoppage effect is affected due to too early or too late action is avoided.

The application belongs to the technical field of building air conditioners, and discloses a fan rear single-air-duct double-refrigeration-system fusion host computer, which comprises a shell, at least two groups of refrigerant circulation systems and an exhaust cavity; the two groups of refrigerant circulation systems share an outer heat exchanger negative pressure cavity; the outer heat exchanger negative pressure cavity is composed of an outer heat exchanger, part of the shell and a back plate; a plurality of exhaust outlets of the outer heat exchanger negative pressure cavity are arranged on the back plate, and a fan is arranged at the exhaust outlet; the exhaust outlet is communicated with the exhaust cavity; and an air outlet of the exhaust cavity is arranged on the same side of an air inlet of the shell. The application constructs an outer heat exchanger assembly air path of a low-resistance through equipment platform outer facade louver; innovates an outer heat exchanger assembly structure, and improves the energy density of the fusion host computer body. After heat exchange, the air is constrained and induced by the guide plate piece group in the lateral exhaust section, and is laterally and rapidly ejected to the outer space of the fusion host computer, so that the exhaust airflow is prevented from flowing back to the host computer equipment platform.

The application relates to the technical field of turbine blade trailing edge cooling, and relates to a wave-shaped flow guide structure applied to a turbine blade trailing edge and a turbine blade. The turbine blade trailing edge is provided with a cooling channel. The wave-shaped flow guide structure comprises a plurality of rows of spoiler columns and a plurality of flow guide plates. The spoiler columns are arranged in the cooling channel and arranged along the flow direction and the span direction, and the spoiler columns in the adjacent two rows are alternately arranged. The flow guide plates are arranged in the cooling channel and extend in a wave shape along the span direction. The wave-shaped extension path of the flow guide plates alternately passes through the regions between the adjacent rows of spoiler columns in sequence. The application can regulate and control the span-wise distribution of the flow in the wedge-shaped channel, on the one hand, strengthens the heat exchange effect in the wedge-shaped channel, and on the other hand, improves the uniformity of the span-wise distribution of the cooling air.

This invention provides a high-temperature resistant superhydrophobic micro / nanostructure coating and its preparation method. The coating is constructed on a substrate surface and includes an adhesive underlayer and a functional surface layer located on the surface of the adhesive underlayer. The adhesive underlayer contains phenyl silicone resin, and the functional surface layer contains superhydrophobic particles, phenyl silicone resin, and carbon fiber shear tubes. The carbon fiber shear tubes form a micron-scale framework structure, and the superhydrophobic particles form a nano-scale rough structure; together, they constitute a hierarchical micro / nanostructure. This invention forms an inorganic-organic hybrid high-temperature resistant superhydrophobic micro / nanostructure coating by synergistically constructing superhydrophobic particles, phenyl silicone resin, and carbon fiber shear tubes on the substrate surface. The superhydrophobic particles provide a high-temperature resistant hydrophobic base, the phenyl silicone resin provides a high-temperature resistant bonding effect, and the carbon fiber shear tubes provide structural reinforcement. Therefore, the resulting coating possesses both good thermal stability and structural stability, and can mitigate performance degradation under high temperatures.

This invention discloses an S-DPG shield-type temperature- and salt-resistant biodegradable pre-formed granular gel temporary plugging agent, its preparation method, and its application, belonging to the technical field of temporary plugging and diversion for acid fracturing and control of fractured formation leakage in oil and gas fields. The temporary plugging agent is composed of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, N-hydroxyethylacrylamide, polyethylene glycol diacrylate, 2-amino-2-methyl-1-propanol, persulfate initiator, and water, and is prepared through aqueous solution free radical polymerization, drying, pulverization, and sieving. Under high temperature and high salt conditions, the temporary plugging agent can absorb water and expand to form a fracture plug. Under the action of acid, hot water, or oxidants, it can gradually degrade and restore core permeability, thus meeting the requirements of stable plugging during the plugging stage and low-damage recovery during the degradation and flowback stage. This material is suitable for temporary plugging and diversion and fracture leakage control in deep, high-temperature, and high-salt fractured oil and gas reservoirs, and has good prospects for field application.

The utility model relates to mould anti -overflow technology field discloses the injection molding mould anti -overflow mechanism of electric vehicle storage tail box casing, including the flow adjusting bin, the inside fixed water stop disc of static of flow adjusting bin, the one end surface rotatory mounting of water stop disc has movable water stop disc, the side surface mounting of flow adjusting bin is used for the self reset drive assembly of drive movable water stop disc rotation. The injection molding mould anti -overflow mechanism of electric vehicle storage tail box casing, through the mechanism can real -time perception mould local high temperature area, and automatically adjust fast this area cooling water flow, rapidly take away the heat accumulation, effectively reduce the mould temperature of this area, this directly improved the viscosity of contact high temperature area melt, make its flow resistance increase, thereby greatly weakened the ability of melt seepage into the parting surface gap, fundamentally suppressed the tendency of overflow because of temperature is too high.

The invention provides a heat exchange device of a mixed TPMS structure and a construction method of the heat exchange device, relates to the field of heat energy engineering and new energy automobiles, and solves the problems that an existing TPMS heat exchanger adopts a fixed topology, heat exchange and flowing properties are difficult to collaboratively optimize under the same porosity and appearance, the energy efficiency is limited, and the service life is prolonged. And adaptive thermal management requirements under variable working conditions cannot be met. The method comprises the steps that two different TPMSD structures are selected, a basic topological unit of the mixed heat exchange core is constructed, and implicit functions corresponding to the two TPMS structures are extracted; according to the target heat exchange performance requirement, the weighting coefficients of the two TPMS structures are determined; based on the weighting coefficient and the implicit functions of the two TPMS structures, constructing a composite implicit function representing the variable coefficient mixed TPMS structure; and constructing a three-dimensional geometric model of the hybrid heat exchanger core based on the composite implicit function. The method and the device are used in the construction process of the mixed TPMS structure.

The utility model provides a horizontal well cementation sand prevention structure which comprises an oil well and a casing pipe which are arranged in the horizontal direction, the casing pipe is arranged in the oil well in a sleeved mode, a cement sheath is filled in an annular space between the oil well and the casing pipe, a galling face is arranged on the upper surface of the casing pipe, and smooth faces are arranged on the lower surface and the two sides of the casing pipe. The well cementation sand prevention structure of the horizontal well has the advantages that even filling is easier during cement pouring, and a large cavity is not prone to being formed.

This utility model discloses a high-efficiency waste heat recovery device for waste incineration, including an incinerator. The furnace wall of the incinerator has a cavity, and a spiral heat exchange tube is installed inside the cavity. An installation pipe is fixedly inserted into the top of the incinerator. The inner cavity of the installation pipe is equipped with a filter assembly for filtering fly ash in the high-temperature flue gas generated by the incinerator. A cap is threaded to the outer circumference of the top of the installation pipe. A connecting hose is inserted into one side of the top of the cap. The end of the connecting hose is sleeved on the input end of the spiral heat exchange tube. By setting up the filter assembly and installing a filter cylinder inside the installation pipe, the fly ash can be initially intercepted before the high-temperature flue gas enters the conveying pipe, preventing fly ash from directly adhering to the inner wall of the pipe. This prevents the inner diameter of the conveying pipe from shrinking and clogging from the source, and reduces the frequency of shutdown for ash cleaning.

The utility model provides a kind of MEMS heat dissipation device, including MEMS sound and heat dissipation chip, microchannel radiator of being attached to MEMS sound and heat dissipation chip, the size of gas passage of microchannel radiator is micrometer level, and the heat dissipation surface of microchannel radiator is used to attach in the surface of heat source.The utility model also provides corresponding mobile device.The utility model utilizes the high back pressure, low power consumption and miniaturization characteristics of MEMS heat dissipation chip, solves the problem that performance reduction and user experience difference caused by high-performance component heating under the extremely limited environment of space, power consumption and noise of mobile device;And the utility model integrates heat dissipation function and acoustic function in single MEMS device, to realize the multiplexing of device function and the further optimization of equipment space.

The utility model discloses a hydraulic oil cylinder guide sleeve buffering mechanism which comprises a cylinder body, a guide sleeve is fixedly installed on the inner wall of the upper end of the cylinder body, a piston rod is movably connected to the inner wall of the guide sleeve in an attached mode, and a movable piston is fixedly installed on the outer curved surface of the lower end of the piston rod. The front sides of the upper and lower ends of the cylinder body are fixedly communicated with an upper oil port and a lower oil port in a penetrating manner; an annular oil groove is formed in the middle of the lower end of the guide sleeve, upper buffer grooves are formed in the two sides of the lower end of the guide sleeve, upper communicating openings are formed in the inner sides of the upper ends of the upper buffer grooves, upper adjusting openings are formed in the outer sides of the upper ends of the upper buffer grooves, and upper adjusting pipes fixedly communicate with the outer sides of the upper adjusting openings. The inner wall of the upper adjusting pipe is in threaded connection with an upper adjusting bolt, and the outer curved surface of the outer side of the upper adjusting bolt is in threaded connection with an upper adjusting nut used for locking and fastening the upper adjusting bolt. When the piston rod stretches out and draws back to the end point for buffering, the buffering resistance can be adjusted conveniently.

The invention discloses an automatic pouring system and an automatic pouring process for propellants. The automatic pouring system comprises an automatic quantitative pouring system (2), a vacuum cylinder (1), a truss manipulator (7), a mold (9), a truss manipulator clamp (16) and a ground rail conveying line (3), the automatic quantitative pouring system (2) comprises a first-stage chemical pouring system and a second-stage chemical pouring system, the first-stage chemical pouring system comprises a first-stage pouring hopper (2-4) and a first servo rubber tube valve (2-12), and the second-stage chemical pouring system comprises a second-stage pouring hopper (2-7) and a second servo rubber tube valve (2-16); the ground rail conveying line (3) is used for conveying the mold (9) and the vacuum cylinder (1), and the truss mechanical arm clamp (16) can be matched with the truss mechanical arm (7) to load the mold (9) into the vacuum cylinder (1) and take the mold (9) away from the vacuum cylinder (1). According to the automatic quantitative pouring device, the safety of the product pouring process is improved, the pouring quality of the product is guaranteed, the production efficiency is improved, and the safety risk is effectively eliminated by adopting the automatic quantitative pouring mode of the first-stage hopper and the second-stage hopper.

The utility model discloses a windproof warm-keeping chemical fiber fabric, which relates to the technical field of fabrics, and is characterized in that the windproof warm-keeping chemical fiber fabric comprises a base layer, a plurality of spoiler strips I and a plurality of spoiler strips II are fixedly connected to the end surface of one side of the base layer, and the horizontal sections of the spoiler strips I and the spoiler strips II are arch-shaped. The multiple first turbulent flow strips and the multiple second turbulent flow strips are linearly arrayed in the warp direction of the base layer to form multiple turbulent flow sets, the opening direction of the first turbulent flow strips in each turbulent flow set is opposite to the opening direction of the second turbulent flow strips in each turbulent flow set, heat preservation strips are arranged between the adjacent turbulent flow sets, and a windproof layer is arranged on the end face of the other side of the base layer. The nylon fiber and the polyester profiled fiber with the hollow circle center section are arranged in the fabric, the overall heat retention property of the fabric is improved by utilizing the characteristics of fluffiness and heat retention of the material, and the arrangement of the windproof layer ensures that the base layer has a good windproof effect.

This application discloses a door body and a storage device, belonging to the field of refrigeration technology. The door body includes: a door shell; a door liner, spaced apart from the door shell along a first direction; and a handle trim strip connected between the door shell and the door liner, forming a handle groove for operation, and including a first sub-trimmed strip and a second sub-trimmed strip connected to each other. The first sub-trimmed strip is connected to the door shell, and the second sub-trimmed strip is connected to the door liner. The first sub-trimmed strip includes a first overlapping plate extending along a second direction, and the second sub-trimmed strip includes a second overlapping plate extending along the second direction. The first overlapping plate and the second overlapping plate overlap along a third direction. Through the above-mentioned split handle trim strip design, combined with the overlapping cooperation of the first overlapping plate and the second overlapping plate, the bending force caused by the internal and external temperature difference is effectively dispersed and offset, significantly improving the bending resistance of the door body, greatly reducing the risk of bending deformation of the door body, and enhancing the sealing between the door body and the door frame.

The invention relates to the technical field of heat exchangers, in particular to a coaxial double-channel heat exchange sleeve which is characterized in that two outer pipes are mounted in a mutually overlaid manner, each outer pipe is composed of a plurality of bent sections with two inclined sides and a horizontal section in the middle, the whole outer pipe is arranged in a spiral winding rising state, and connectors are arranged at the upper ends and the lower ends of the two outer pipes respectively; the interiors of the two outer pipes are coaxially connected with inner pipes along the paths of the outer pipes correspondingly. The middle of the inner pipe of each horizontal section is connected with a spiral channel, the middle of each spiral channel is separated through a supporting ring block, each horizontal section and the corresponding supporting ring block are each connected with a medium guiding component, and the medium guiding components guide media in the gap between the outer pipe and the inner pipe in a spiral advancing mode. The contact area of heat exchange is increased by matching with the contact with the spiral channel; according to the invention, through a double helix and self-adaptive adjustment composite means, flow and a thermal boundary layer are destroyed, so that medium distribution and heat exchange are more uniform, and the overall heat exchange coefficient and efficiency are improved.

The utility model discloses a composite shockproof damper combining spring, hydraulic pressure and eddy current. The composite shockproof damper comprises a connecting rod assembly, a damping wall assembly, a rotating support and a shell. The connecting rod assembly comprises a magnetic body, a spring and a connecting piece, the damping wall assembly is of a multi-layer composite structure and forms a closed cavity, and the cavity is filled with a viscous damping medium; a channel structure for guiding the viscous medium to flow is arranged in the magnetic body, and the spring has the rigidity nonlinear change characteristic; the rotating support is provided with a rotating mechanism, and the outer side of the damping wall assembly is wrapped with the shell. The damping wall assembly comprises a conductive layer and a heat dissipation layer, eddy current damping is generated through relative movement of the magnetic body and the conductive layer, and the heat dissipation layer is thermally coupled with the conductive layer. According to the utility model, elastic restoring force is provided during small-amplitude vibration, so that the small-amplitude vibration of a bridge is effectively inhibited; under the large-amplitude earthquake working condition, the spring enters a plastic stage, and energy is absorbed through plastic hysteretic deformation; and the damper can keep efficient energy consumption under different earthquake intensities.

The invention relates to the technical field of ceramic product forming, and discloses a 3D printing head feeding device for manufacturing ceramic products, the 3D printing head feeding device comprises a printer, the top of the printer is fixedly connected with a slurry cylinder, the upper portion of the printer is slidably connected with a spray head, and a hose is fixedly connected between the slurry cylinder and the spray head; a center rod is fixedly connected to the interior of the slurry cylinder; the slurry barrel comprises a feeding barrel, a first separation barrel, a cutting barrel, a second separation barrel and a rotating barrel, the first separation barrel and the second separation barrel are both fixedly connected to the top of the printer, and the cutting barrel is fixedly connected between the first separation barrel and the second separation barrel. According to the 3D printing head feeding device for manufacturing the ceramic products, the problems that in the prior art, slurry particles are agglomerated, so that the fluidity of slurry in the charging barrel becomes poor, the extrusion pressure of the slurry is unstable, the extrusion speed of the slurry is uneven, and the printing continuity and stability of the ceramic products are affected can be effectively solved.