105results about How to "Improve flow" patented technology

The invention relates to an engineering bacterium of high-yield ornamental blue as well as a construction method and application of the engineering bacterium, and belongs to the technical field of natural dye synthesis by a biological method. The engineering bacterium capable of highly producing the ornamental blue, disclosed by the invention, expresses icd, bpsA, glnAY405F and gd hA; acnR, yggB, glsK, aceA and ldh are knocked out from the engineering bacteria. According to the application, yggB and aceA genes are knocked out, site-directed mutagenesis (Y405F) is carried out on a glnA gene, a glsK gene is replaced by a glnAY405F gene, an acnR gene is replaced by an icd gene, an ldh gene is replaced by a gdhA gene, and a bpsA gene is integrated, so that the formation of by-products such as lactate and succinic acid in a blue-viewing synthesis process can be blocked; the flow direction of a passage from citric acid to isocitric acid to alpha-ketoglutaric acid to glutamic acid to glutamine is improved, so that the concentration of glutamine in cells is improved, and the yield of the ornamental blue is improved.

The invention relates to an air conditioner temperature and humidity independent control system and method based on two-stage coil chilled water. On the basis of the existing chip plant temperature and humidity independent control based on a fresh air processing unit, a return air drying and cooling coil and a fan filtering unit, low-temperature chilled water outlet of a water chilling unit firstly passes through a fresh air re-cooling coil; return water obtained after the temperature of the fresh air re-cooling coil pipe rises serves as water supply of the fresh air pre-cooling coil pipe and the return air cooling dry coil pipe, so that two-stage coil pipe chilled water is formed, and the return water of the fresh air pre-cooling coil pipe and the return water of the return air cooling dry coil pipe are mixed and then serve as chilled water return water of the water chilling unit. By increasing the return water temperature of the water chilling unit, the average evaporation temperature of an evaporator of the water chilling unit is increased. A bypass is arranged between an inlet and an outlet of the return air cooling dry coil, and the air temperature in the plant is controlled by adjusting the bypass flow through an electric two-way adjusting valve and a PID controller. Compared with the prior art, the invention has the advantages of high unit energy efficiency ratio, low refrigeration energy consumption, simplified system and the like.

The present invention provides a precise proportioning fermentation device for tricholoma matsutake beverage production, and relates to the technical field of beverage proportioning fermentation, the precise proportioning fermentation device comprises a mixed fermentation mechanism, the mixed fermentation mechanism can be used for preparing a beverage and storing the prepared beverage, the mixed fermentation mechanism is arranged at the top of the mixed fermentation mechanism, and the conveying mechanism is arranged at the bottom of the mixed fermentation mechanism. Raw materials are injected into the mixed fermentation mechanism from the conveying mechanism, the proportioning mechanism is arranged above the conveying mechanism, and the proportioning mechanism extends into the conveying mechanism and is matched with the conveying mechanism to control the injection amount of the raw materials. During use, the internal volume of the metering cylinder is changed through the volume piston in advance, then raw materials are fully injected into the metering cylinder through the feeding pipe, then the bottom of the metering cylinder is driven to exceed the bottom of the proportioning pipe for discharging, and the feeding pipe is sealed through the outer surface of the metering cylinder to avoid leakage; meanwhile, the flow speed of the raw materials in the metering cylinder is increased through extrusion of the volume piston, and the effect of improving the fermentation matching accuracy is achieved.

The invention provides an airflow pattern testing tool, a testing device and an airflow pattern testing method, and relates to the technical field of airflow pattern testing. The air flow pattern test tool comprises a test piece; the surface of the test piece is a curved surface, a closed cavity is formed in the test piece, and the closed cavity is filled with gas with the density smaller than that of gas in the to-be-tested space, so that the test piece can float under the blowing action of the gas flow in the to-be-tested space and move in the flow direction of the gas flow. The airflow flow type testing tool can indicate the overall movement track of airflow through the testing piece which can float along with airflow blowing and move in the airflow direction, the testing process is continuous, all airflow movement tracks can be reflected, the testing accuracy is improved, operation is convenient and fast, and smoke residues cannot be generated to pollute the space to be tested.

The invention relates to an efficient heat exchanger for petrochemical engineering, and relates to the technical field of heat exchangers. The device comprises a heat exchange shell, a corrosion inhibition box fixed to the heat exchange shell, a plurality of heat exchange pipes and two baffle plates which are rotationally arranged on the heat exchange shell, a processing mechanism for conducting scraping, brushing, fracture detection and marking on the heat exchange pipes correspondingly, and a rotating assembly for conducting rotating driving on the heat exchange pipes. The translation assembly is used for carrying out translation driving on the two baffle plates; the test assembly is used for carrying out deformation detection on the inner wall of the heat exchange shell; the corrosion inhibition box is used for storing a corrosion inhibitor, and a control assembly used for controlling the release amount of the corrosion inhibitor is arranged on the heat exchange shell. The purpose of heat exchange between the petroleum raw material and the heat medium can be achieved, the petroleum raw material can be guided to be evenly distributed in the tube pass, the phenomenon that the petroleum raw material forms laminar flow or uneven flow in the tube pass is avoided, heat stress caused by uneven heating of the heat exchange tube is prevented, and deformation and cracking of the heat exchange tube due to the heat stress are prevented.

The invention provides a method for assisting and strengthening a chemical reaction of a flow battery based on local ultrasound, which comprises the following steps of: (1) arranging ultrasonic transducers on bipolar plates of a positive half battery and a negative half battery of the flow battery, the arrangement position of the ultrasonic transducer on the bipolar plate and the size of the ultrasonic transducer enable the action area of ultrasound applied by the ultrasonic transducer to cover the flow dead zone in the porous electrode; (2) connecting a signal generator with an ultrasonic transducer through a power amplifier; and (3) in the operation process of the flow battery, starting the signal generator and the power amplifier to apply ultrasound to the flow battery through the ultrasonic transducer, and improving the flow velocity and the flow uniformity of the electrolyte in the porous electrode by utilizing the ultrasound so as to strengthen the chemical reaction of the flow battery. According to the method, the flow uniformity of the electrolyte in the porous electrode can be effectively improved, the flexible regulation and control of the flow field in the porous electrode of the flow battery are realized, and the ultrasonic power consumption of the regulation and control of the flow field in the electrode is reduced.

The utility model relates to a general syrup processing filter which comprises a filter box, a filter plate is fixed between the upper end and the lower end of the inner wall of the filter box, an annular plate is fixed on the outer surface of the filter plate, an anti-blocking mechanism is arranged on the filter box, a cleaning mechanism is arranged on the filter box, and a feeding pipe is fixed at the top end of the filter box. Two discharging pipes and a slag discharging pipe are fixed to the bottom end of the filtering box, a servo motor is fixed to the bottom end of the filtering box, a rotating shaft is fixed to an output shaft of the servo motor, and a stirring shaft is fixed to the outer surface of the rotating shaft. According to the general syrup processing filter, an anti-blocking mechanism is arranged on the filter box, so that a filter plate can be dredged by a dredging rod when being blocked, syrup can conveniently flow through filter holes of the filter plate, and a cleaning mechanism is arranged on the filter box, so that the interior of the filter box can be conveniently cleaned; water sprayed by the spray heads can be used for cleaning the dredging rod and the filter plate.

The application discloses a mold stripping mode, which comprises three steps of positioning, pre-tightening and mold stripping; through the positioning, the first arm and the second arm of a manipulator can cooperate to clamp a sand mold; through the pre-tightening, jacking working pieces press against the manipulator and a bottom plate to overcome the gap between the arms and the sand box in the Z direction; the synchronous action of all the jacking working pieces is favorable for the sand mold to integrally separate from the bottom plate in a relatively horizontal stable state; after the sand mold separates from the bottom plate, the sand mold and a wooden mold are separated, and the sand mold can be easily and quickly lifted by the upward movement of the manipulator. The application also provides a mold stripping device for realizing the mold stripping mode; the mold stripping device comprises a manipulator, the manipulator comprises a hanging beam, a first arm, a second arm, a first support, a second support and jacking working pieces; the jacking working pieces can realize the reliable separation of the sand mold and the bottom plate through pre-tightening and synchronous force; after the manipulator lifts the sand mold, the first support and the second support cooperate to overturn the sand mold, so as to facilitate flow coating, mold closing and other operations.

The invention discloses a multi-path distribution self-starting fire extinguishing device which comprises a fire extinguishing tank, a shunt, an alarm and a fusible pipeline, the fire extinguishing tank is provided with a liquid outlet, the liquid outlet is connected with a branching device through a main pipeline, one end, close to the branching device, of the main pipeline is communicated with an external air source through a pressurizing pipeline, the pressurizing pipeline is provided with a one-way valve, the branching device is connected with a plurality of branch pipelines extending to an inflammable area, and the branch pipelines are communicated with the main pipeline. The branch pipelines are connected with fusible pipelines located in the corresponding flammable areas. A pressure relief sensor is arranged on the fire extinguishing tank, and the pressure relief sensor is connected with the alarm in a closed loop manner; and the fire extinguishing tank is also provided with an anti-decompression valve and a pressurizing valve. The fire extinguishing device is reasonable in structural design and easy and convenient to operate, fire disasters can be extinguished automatically, rapidly and effectively, the safety and reliability of the agricultural machinery can be improved, and a powerful guarantee is provided for safe operation of the agricultural machinery.

This application provides a heat dissipation device and electronic device, including: a condenser having an internally vacuumed and sealed cavity; a liquid pipe containing a liquid working fluid, one end of which is connected to the condenser; a compensation chamber having an internally vacuumed and sealed cavity, through which the liquid pipe passes and communicates with the compensation chamber, and a liquid-absorbing core covering the surface of the liquid pipe within the compensation chamber; an evaporator having an internally vacuumed and sealed cylindrical structure, comprising a vapor channel, a first capillary core, and a second capillary core stacked sequentially from the outer wall surface of the cylindrical structure to the central axis, the other end of which penetrates a portion of the evaporator, and the second capillary core covering a portion of the surface of the liquid pipe; a gas pipe, one end of which is connected to the vapor channel, and the other end of which is connected to the condenser; and a heat-conducting plate covering the outer surface of the evaporator. The heat dissipation device and electronic device provided in this application embodiment at least improve the heat dissipation efficiency of electronic devices.

The utility model relates to the technical field of fixing devices, in particular to an infusion fixing device which comprises a patch, mucilage glue pieces are arranged on the two sides of the bottom end of the patch, anti-sticking pieces are arranged on the surfaces of the bottom ends of the mucilage glue pieces, a T-shaped groove is formed in the surface of the top end of the patch, and a supporting disc is arranged on the inner side of the T-shaped groove. A stand column is arranged in the center of the top end of the supporting disc, a clamping block is arranged at the top end of the stand column, and a pressing block is arranged at the top end of the clamping block. A medical worker places a double-hole infusion tube connector body on the inner side of an arc-shaped groove formed in the surface of a clamping block and the inner side of an arc-shaped groove formed in the surface of a pressing block, and an L-shaped clamping block arranged at the top end of the pressing block is limited, clamped and fixed through a spring buckle arranged at one end of a fixing block; the double-hole infusion tube connector body with different diameters can be conveniently limited and fixed, the infusion fixator is convenient to install and comfortable to wear, and the situation that when the double-hole infusion tube connector body is pulled by external force, an indwelling syringe needle is misplaced is effectively avoided.

The particle separator comprises an oil baffle ring fixed to an air inlet of a fan shell through a flange ring, the cross section of the oil baffle ring is in a C shape, a center shaft is arranged in the center of the inner side of the oil baffle ring, and one end of the center shaft is in transmission connection with an impeller shaft in the fan through a clutch mechanism. The central shaft is sleeved and fixedly connected with a shaft sleeve, the shaft sleeve is provided with an oil-smoke separation assembly, the air inlet end of the oil baffle ring is provided with a rough filtration mechanism, and the other end of the central shaft is in transmission connection with the rough filtration mechanism; the oil fume separation assembly comprises a mesh support and two oil fume separation meshes, the two oil fume separation meshes are installed on the two sides of the mesh support, a plurality of oil scraping plates are arranged on the outer side edge of the mesh support, an oil leakage opening is formed in the bottom of the oil baffle ring, and the position, corresponding to the oil leakage opening, of the bottom of the oil baffle ring is fixedly connected with an oil receiving box through a bolt assembly. According to the particle separator for the fan, energy loss is reduced, the operation efficiency and durability of the impeller are improved, and the service life of the motor is prolonged.

The present invention relates to the technical field of air-conditioning heat dissipation, and specifically to a multi-stage heat dissipation device and method for air-conditioning with a function of preventing heat accumulation, comprising: an air duct, and a discharge pipe fixed to the side wall of the air duct, a first sieve plate fixed to the end of the air duct facing away from the discharge pipe, a second sieve plate fixed to the side wall of the discharge pipe, and a liquid storage tank fixed to the air duct; a fan rotatably installed in the air duct and used to control the outside air to enter the air duct; a driving mechanism arranged in the air duct, a water-cooling circulation mechanism connected to the driving mechanism is also arranged in the air duct, and a circulating cooling pipe connected to the liquid storage tank is connected to the water-cooling circulation mechanism; a temperature control adjustment mechanism is arranged on the driving mechanism. The present application can achieve multi-stage heat dissipation of the air conditioner through the cooperation of water cooling and air cooling, and automatically adjust the output power of water cooling and air cooling according to the temperature of the air conditioner, thereby automatically adjusting the heat dissipation effect.

The utility model discloses a semi-automatic desalting device adopting a peristaltic pump, which comprises a desalting device, the desalting device is composed of a desalting pond, a transmission mechanism, a peristaltic pump mechanism and a filtering mechanism, a base is arranged at the bottom end of the desalting pond, the peristaltic pump mechanism and the filtering mechanism are arranged on the upper side of the base, and the peristaltic pump mechanism and the filtering mechanism are arranged on the base. One end of the filtering mechanism is connected with one side of the bottom end of the desalting pond through a guide pipe, the peristaltic pump mechanism is connected with the filtering mechanism through a guide pipe, the conveying mechanism is composed of a frame, a shaft rod, a motor and a grid conveying belt, the shaft rod is rotationally installed on one side of the bottom end of the desalting pond and at the upper end of the frame, and the grid conveying belt wraps the outer side of the shaft rod. The cleaned and soaked materials can be conveyed upwards along the conveying mechanism, meanwhile, in the soaking process, liquid leading-out and water leading-in are conducted at the same time through the peristaltic pump mechanism, an aqueous solution is driven to flow circularly, and the cleaning effect of the aqueous solution in the desalting pond on the materials is guaranteed.

The application relates to the technical field of vehicle exhaust treatment, and provides an exhaust treatment system and a vehicle. The exhaust treatment system comprises a particle trap and a regeneration device, the regeneration device comprises an oil-gas mixing part, a gas path assembly and an oil path assembly, and a fluid driving part connected between the oil-gas mixing part and the particle trap, and the fluid driving part can drive an oil-gas mixture in the oil-gas mixing part to flow into the particle trap. The exhaust treatment system provided by the application sets one fluid driving part, which can facilitate the smooth flow of exhaust gas and fuel into the oil-gas mixing part, the exhaust treatment system has a simple structure, and the oil-gas mixture can smoothly flow to the downstream, which is helpful for the combustion regeneration of the particle trap, has a good exhaust treatment effect, and can reduce the emission of pollutants.

The present invention relates to an expansion joint suitable for a low-headroom lightweight busbar, comprising: a first and a second expansion joint arranged in parallel; a first flow taker, one end of which is fixedly connected to the first expansion joint, and a lower pressure plate is fixedly arranged at the bottom of the other end; a second flow taker, one end of which is fixedly connected to the second expansion joint, and a lower pressure plate is fixedly arranged at the bottom of the other end; the lower pressure plate has a horizontal section arranged horizontally, a groove is provided in the horizontal section, and a pressure block is installed in the horizontal section, the top of which is against the second expansion joint or the bottom of the first expansion joint; the pressure block cooperates with the bottom of the flow taker to clamp the second expansion joint or the first expansion joint, and the first flow taker is slidably connected to the second expansion joint or the second flow taker is slidably connected to the first expansion joint; the first expansion joint can slide relative to the second expansion joint to ensure the stable operation of the locomotive and improve the safety and reliability of the locomotive operation.

This utility model relates to the field of bearing cage technology, and provides a high-speed, high-temperature resistant nylon cage for deep groove ball bearings, including a high-temperature resistant cage body; pockets equally spaced at the top of the high-temperature resistant cage body, with oil reservoirs equally spaced on the inner wall of the pockets, the three oil reservoirs being interconnected by connecting grooves, and a ball bearing rotatably connected to one end of the inner wall of each oil reservoir; symmetrically arranged oil injection holes on both sides of the bottom of the high-temperature resistant cage body, the top of each oil injection hole communicating with the interior of one of the oil reservoirs; and a sealing assembly assembled inside the oil injection holes. The high-speed, high-temperature resistant nylon cage for deep groove ball bearings provided by this solution utilizes rolling balls to change the contact between the bearing rollers and the inner wall of the pockets from surface contact to multi-point contact, reducing contact friction. Simultaneously, the oil reservoirs store a certain amount of lubricating oil, thus providing long-term effective lubrication of the bearing rollers and further reducing rotational friction.

The utility model relates to the technical field of roof greening, in particular to a self-drainage integrated roof greening module which comprises a plurality of assembly plates, the two sides of the top faces of the assembly plates incline downwards, a plurality of planting grooves are formed in the two sides of the top faces of the assembly plates, the top faces of the planting grooves are flush with each other, water channels are installed at the low positions of the two sides of the assembly plates, and the water channels are communicated with the planting grooves. Clamping grooves and plugs are arranged on the two sides of the outer portions of the water channels respectively, a plurality of first holes are formed in the side walls of the water channels, a plurality of second holes are formed in the side walls of the planting grooves, and the positions of the second holes correspond to the positions of the first holes respectively. The utility model has the advantages that the two sides of the top surface of the assembly plate are inclined downwards so as to facilitate the flowing of accumulated water, the water channels are arranged on the two sides of the assembly plate, the accumulated water flowing down from the assembly plate is gathered into the water channels for uniform drainage, the accumulation of sewage is avoided, and a plurality of placing grooves which are uniformly arrayed are arranged on the two sides of the top surface of the assembly plate.

The utility model relates to the technical field of lime kilns, in particular to a double-chamber lime kiln with good smoke discharge capacity, which comprises a lime kiln body, a gas pipeline, a smoke pipeline and an air pipeline, the gas inlet end of the gas pipeline is connected with the side wall of the lime kiln body, and the smoke pipeline connecting end of the smoke pipeline is connected with the side wall of the lime kiln body. The air inlet end of the air pipeline is connected with the side wall of the lime kiln body, the smoke pipeline connecting end is higher than the coal gas inlet end, and the air inlet end is lower than the coal gas inlet end. According to the utility model, through the position design of each pipeline on the lime kiln body, the gas inlet end is positioned above the air inlet end, so that the uniform mixing of gas and air is facilitated, the phenomenon of insufficient local combustion is reduced, better mixing of air and gas can be realized, and the combustion efficiency is improved; meanwhile, the flue gas pipeline connecting end is higher than the coal gas inlet end, so that flue gas can be smoothly discharged, and flue gas backflow is reduced.

The invention relates to the technical field of fuel cells, and discloses a fuel cell humidifier with a novel structure, the fuel cell humidifier comprises a main body shell and a bundling shell, the bundling shell is assembled on an internal end plate of the main body shell, and the bundling shell is provided with an internal slide block structure; the internal sliding block structure is in sliding fit with an end plate in the main body shell so as to adjust the size of the bundling shell, a hollow fiber membrane tube is arranged in the bundling shell, the hollow fiber membrane tube is fixed with the main body shell through a pouring sealant surface, two ends of the main body shell are detachably connected with end covers, and the end covers are used for being connected with a dry gas path. A pressure regulating valve is installed on the main body shell and used for balancing the pressure difference of a dry path and a wet path, and a connector sliding block is arranged at a connector of the main body shell and is in sliding connection with the connector of the main body shell so as to adjust the direction of the connector of the wet path. The humidifier is used for solving the problems that an existing humidifier is insufficient in anti-compression and anti-impact strength, poor in plasticity and limited in adaptability, and the use stability is affected by differential pressure fluctuation of a dry path and a wet path.

The invention provides an exotesta removing device, and relates to the technical field of suaeda heteroptera exotesta removing. The driving assembly is mounted at the top of the mounting assembly; the elastic pressing assembly is mounted on the driving assembly; the testa removing assembly is mounted on the elastic pressing assembly; the second mounting plate block is arranged on the right side of the first mounting plate block, a positioning groove is formed in the left side of the second mounting plate block, and two second bolt mounting holes are further formed in the second mounting plate block; the circular mounting shaft is rotationally mounted in the mounting plate I; according to the suaeda heteroptera seed coat removing device, the grinding effect on the suaeda heteroptera outer seed coat is achieved, automatic falling of the suaeda heteroptera outer seed coat is achieved, a hollow removing cylinder makes elastic contact with suaeda heteroptera seeds under the action of two second reset springs, suaeda heteroptera seeds are prevented from being damaged, and the suaeda heteroptera outer seed coat removing effect is improved; the problem that the suaeda heteroptera seeds are easily damaged due to the fact that the manual beating or grinding force is not easy to control is solved.

The utility model discloses an electric steamer which comprises a base, a steamer assembly and an external water tank, the steamer assembly and the external water tank are arranged on the base, the base comprises a water storage cavity, a steam generation cavity and a heating piece arranged at the bottom of the steam generation cavity, and a separation rib is arranged between the water storage cavity and the steam generation cavity. The external water tank comprises a water supplementing cavity, a two-way water passing channel is arranged between the water storage cavity and the water supplementing cavity, and a one-way water passing channel allowing water flow to flow from the water supplementing cavity to the steam generating cavity is arranged between the water supplementing cavity and the steam generating cavity. A floater is arranged in the one-way water passing channel and floats along with the water level so as to control on-off of the one-way water passing channel. According to the electric steamer, pollutants entering the one-way water passing channel can be effectively reduced, so that the influence of the pollutants on the floating of the floater is reduced, and the service life of the floater is effectively prolonged.

The utility model provides a kind of temporary storage device of cream, belong to cream storage technical field, including storage box, connection box is provided on the side surface of storage box, stirring mechanism is provided on storage box and connection box, stirring mechanism includes transmission part, spiral piece for realizing lifting feeding is provided on transmission part, it is also provided with for stirring cream mixing frame, transmission part is used to realize the rotation of spiral piece and mixing frame, the utility model can guarantee the full mixing of cream, avoid the situation that bottom adhesion appears, guarantee the storage quality of cream.

The invention relates to the technical field of chemical sludge drying, in particular to a chemical sludge drying treatment device which comprises a flocculation tank body assembled on a stacked screw machine body, the cleaning frame is vertically and slidably connected to the inner wall of the flocculation tank body and comprises a plurality of cleaning rods which are vertically arranged, the cleaning rods abut against the inner wall of the flocculation tank body, the cleaning rods are connected with moving rods, a hollow moving column is arranged at the bottom of the interior of the flocculation tank body, and the moving rods are vertically and slidably connected to the inner wall of the moving column; a plurality of communicated air pipes are arranged at the bottom outside the flocculation tank body, the air pipes are communicated with the bottom of the movable column, and a plurality of air outlets are formed in the air pipes. Sludge attached to the inner wall of the flocculation tank body can be cleaned, the condition that the sludge is deposited at the bottom of the inner cavity of the flocculation tank body is improved, smooth flowing of the sludge in the flocculation tank body is kept, the treatment efficiency is improved, and the flocculation process is promoted.

The utility model relates to the technical field of injection molding equipment, and discloses a double-color mold co-injection hot nozzle valve needle structure which comprises a hot runner plate, the upper surface of the hot runner plate is fixedly connected with a splitter plate, the upper surface of the splitter plate is fixedly connected with a panel, the upper surface of the panel is fixedly connected with a main nozzle, and the upper surface of the main nozzle is fixedly connected with a hot runner. A hot nozzle piece is arranged at the bottom of the hot runner plate, a threaded cylinder is in threaded connection with the bottom of the hot nozzle piece, a discharging nozzle is fixedly connected with the bottom of the threaded cylinder, an electric heating wire is fixedly connected into the inner wall of the discharging nozzle, a front filter disc is fixedly connected into the discharging nozzle, and a rear filter disc is arranged below the front filter disc. According to the hot nozzle piece, the threaded cylinder, the discharging nozzle, the electric heating wire, the front filter disc, the rear filter disc and the flow guide unit are matched, so that materials passing through the hot nozzle piece can be subjected to flow guide extrusion, the mixing uniformity of the materials is further improved, and the problem that the production quality of products is affected due to the fact that the plastic materials are mixed uniformly is solved.

This utility model belongs to the field of helmet technology, and specifically relates to a helmet, including a main body and an outer shell covering the outside of the main body. The main body has an inner cavity. The front side of the outer shell has a first air inlet, and the front side of the main body has a second air inlet communicating with the first air inlet. Air can enter the inner cavity through the first and second air inlets. A support frame is provided at the top of the inner cavity, and a cushioning pad is provided on the support frame. The support frame and / or the cushioning pad can rest against the top of the user's head, thereby forming an airflow channel between the top of the inner cavity and the user's head. The purpose of this utility model is to provide a helmet with a simple structure, good heat dissipation, and good comfort.

The present invention discloses a nucleic acid-based multi-channel Ca 2+ Nanomodulators and their preparation methods and applications belong to the field of biomedical technology. The present invention uses a coprecipitation method to load the calcium ion efflux inhibitor curcumin into amorphous calcium phosphate, and then adsorbs DNA aptamers on its surface. The resulting ACP@C‑D can be used to promote the dual pathway of cancer treatment mediated by mitochondrial dysfunction, and has been shown to have the following advantages: (1) ACP@C‑D can disintegrate at the TME and release CUR and Ca 2+ , thereby improving the accuracy of treatment. (2)Ca 2+ The sudden increase in Ca 2+ (3) The released CUR can not only prevent Ca 2+ efflux and can also promote Ca 2+ From the endoplasmic reticulum to the mitochondria, further amplifying Ca 2+ In conclusion, this nanomodulator is a promising nanomedicine that can provide a valuable reference for mitochondria-based tumor therapy.

A method for coproducing hydrofluorocarbons, the method involving preheating a mixture of a chlorinated alkene and hydrogen fluoride and then introducing the mixture into the top of a reactor, while also introducing 1,1,1,2,3,3-hexafluoropropylene and dichloromethane into the middle portion of the reactor for a reaction to obtain a reaction product at an outlet of the reactor, wherein the reactor is divided into three to six sections, each of which is filled with a catalyst; and separating the reaction product to obtain a plurality of hydrofluorocarbon products, respectively. The method has advantages such as a high yield, a good selectivity, and a low energy consumption.

The present invention provides an integrated purification plate forming machine, which relates to the field of plate production, including a body structure, wherein mounting frames are installed on the outer walls of the left side and the middle position of the body frame of the body structure, the bottom bearing plate is transported on the body structure, the guiding components of the body structure guide the bottom bearing plate, and the gluing components of the body structure apply glue to the inner wall of the bottom bearing plate, the introducing components close to the gluing components are set to an inclined shape, so that the filler can be stably introduced into the bottom bearing plate, the top sealing plate is poured in an inclined direction toward the upper side of the bottom bearing plate, the auxiliary components are on the inner side of the top sealing plate, the top sealing plate is glued, and finally the top sealing plate and the bottom bearing plate are pressed together by the pressing component to realize the integrated forming of the purification plate, which is conducive to solving the problems that the existing purification plate production steps are scattered, the plate cannot be formed at one time, the filler is easily skewed when the filler is placed by manual operation, and the upper and lower plates are difficult to press symmetrically.