85 results about "Gas retention" patented technology

The invention relates to the technical field of asphalt production, in particular to a directly modified rubber powder asphalt production reaction device which comprises a reaction kettle, a stirring shaft is rotatably arranged in the reaction kettle, a plurality of stirring rods are arranged on the outer side of the stirring shaft, a plurality of expansion rods are rotatably arranged on the outer sides of the stirring rods, the stirring shaft is of a hollow structure, and the expansion rods are arranged on the outer side of the stirring shaft. An angle adjusting unit for driving the stirring rod to rotate is arranged in the stirring rod, a driving unit for driving the expansion rod to unfold on the outer side of the stirring rod is arranged in the stirring rod, and a plurality of temperature sensors are arranged on the inner wall of the reaction kettle. Diffusion of the modifier on a high-temperature low-viscosity surface layer is accelerated, film formation and gas retention are prevented, and uneven mixing caused by bubbles is reduced; the bottom stirring rods are small in unfolding angle, so that the bottom shearing strength is reduced, excessive stirring of deposited aggregate or modifier particles is avoided, and stable flowing of the bottom layer is maintained.

The utility model relates to an X-ray tube anode target disc fixing structure which comprises a rotor, and an anode target disc, a fixing nut, an anti-loose gasket and a locking cover are sequentially installed on the rotor. The locking cover tightly presses the anti-loose gasket, so that the anti-loose gasket generates elastic deformation between the fixing nut and the locking cover; the anti-loose gasket is a wave-shaped gasket; an anti-rotation structure is arranged between the rotor and the anode target disc, the anti-loose gasket is provided with 4-6 waveforms and is made of molybdenum alloy or tungsten alloy, and the rotor is in clearance fit with the anode target disc. The utility model has the advantages of high reliability, long service life and low assembly requirement, eliminates the gas retention risk of the internal closed cavity, and realizes the directional dredging of the gas by establishing a communication channel between the cavity and the external high vacuum environment.

The invention belongs to the technical field of ocean engineering drag reduction, and relates to a self-adaptive chemical gas production underwater drag reduction layer and a preparation method thereof.The surface of an aircraft is regarded as a gas production place and transformed into an intelligent interface with sensing and feedback capabilities, inert gas generated by reaction of reactants is detained and utilized in situ through microstructure design, and the self-adaptive chemical gas production underwater drag reduction layer is obtained. The independent micro chamber structure avoids diffusion of local failure, the macroscopic flow guide structure relieves the problem of non-uniform gas film distribution, external energy input is not needed, the chemical reaction rate is reversely and adaptively regulated and controlled based on the physical effect generated by gas retention, and therefore a closed-loop passive self-adaptive resistance reduction film layer is formed. Reaction byproducts are environment-friendly water-soluble sodium chloride and water and are removed in a pulse type reaction mode of high-speed water flow scouring and gas retention, so that the risk of permanent blockage is reduced, safety and environment friendliness are achieved, the energy utilization efficiency is high, meaningless waste of gas is avoided, and the cruising ability of fuel is equivalently and greatly improved.

The invention discloses a metal laser welding pore defect positioning detection method fusing weld joint temperature field data, and belongs to the technical field of metal laser welding defect detection. A temperature field gas escape coupling model is constructed by obtaining a welding seam temperature field space-time matrix and material thermophysical parameters, and a gas retention distribution value is determined; extracting a characteristic spectral line offset and a molten pool bubble characteristic parameter; performing cross-scale fusion on the features through a multi-scale feature fusion positioning model, and outputting initial positioning coordinates of the pores; the initial coordinates are corrected based on temperature field backtracking, and target three-dimensional coordinates are determined after gas retention conditions are verified; through collaborative fusion and backtracking correction of the temperature field and the multi-source features, the air hole defect positioning precision is improved, and the method is suitable for online defect detection in the metal laser welding process.

The invention relates to the technical field of evanescent mode casting, and discloses an evanescent mode casting process which comprises the following steps: adopting a closed pouring system; setting a pouring temperature; a bottom pouring type pouring system is adopted; a furan resin self-hardening sand core is embedded in the part difficult to fill sand, after a process hole with the diameter smaller than or equal to 50 mm is formed, filling is conducted through an EPS block, sealing is conducted through a high-temperature-resistant adhesive tape, and compaction is assisted through vibration compaction equipment during sand filling; through multi-process collaborative optimization, a full-process controllable lost foam casting system is constructed, the casting density is improved compared with a traditional process, and the tensile strength is improved; the rejection rate is greatly reduced, and the production cycle is obviously shortened; and the dry sand recycling rate is high, and the comprehensive cost is reduced. According to the technical scheme, the problems of discontinuous mold filling, gas retention, dry sand collapse and the like in lost foam casting are solved, and a standardized solution is provided for industrial production of high-end castings.

The invention discloses a high-precision forming mold and process for a chain shaft core, and belongs to the technical field of chain shaft core forming molds. The high-precision forming mold and process for the chain shaft core comprise a mold body used for forming the chain shaft core, and a core groove is formed in the mold body; the punching rod is directly inserted into the core groove of the die body and is used for carrying out forming processing on the chain shaft core; an oil discharging groove is formed in the punching rod and used for discharging gas in the die and reducing the taper of the R corner of the shaft core. The device can solve the problem of suffocation, is used in cooperation with a through groove, assists in discharging gas, further reduces the possibility of suffocation, meanwhile, selects a mode of secondary forming of an R angle, solves the problem of taper and the problem of the R angle, and guarantees the quality of a finally produced chain shaft core.

The application discloses an automatic steel billet perforating device and belongs to the technical field of seamless steel pipe production. The device is provided with an exhaust mechanism. A connecting shaft is arranged in the middle of a blocking plate and is provided with blades matched with the inner wall of a hollow top head. When the blades rotate, the bubble gathering state in the gas blocking area is broken, gas and liquid cooling medium are mixed to form gas-liquid two-phase flow, and the gas is pushed to move to the discharge end of the blocking plate, so that the gas retention in the hollow top head inner cavity is reduced.

The utility model discloses a bromhidrosis post-operation wound pressure bandaging device which comprises a front elastic cloth, elastic shoulder straps are fixedly connected to two sides of the upper surface of the front elastic cloth, a pressure air bag is fixedly connected in each elastic shoulder strap, and a rear elastic cloth is fixedly connected to one side, far away from the front elastic cloth, of each elastic shoulder strap. The pressurizing air bags are arranged on the armpits of a patient and are fixed through the elastic cloth and the elastic shoulder straps, wearing is convenient, the pressurizing air bags are inflated, the grooves are aligned with the armpit wounds, the hard silica gel on the two sides of the grooves apply proper pressure to the armpit skin, it is guaranteed that the skin in an operation area makes good contact with surrounding tissue, and the operation effect is good. Hydrops and gas retention are prevented, growth of skin and subcutaneous tissue is promoted, the risk of infection is reduced, and rehabilitation is facilitated.

The utility model discloses a solid-phase extraction device capable of preventing splashing. The solid-phase extraction device comprises a base, a test tube with a conical opening part and a nitrogen blowing tube, through the optimized design of the chock plug structure, the holes are formed in the surface of the chock plug to allow nitrogen to be smoothly discharged after purging, and pressure abnormity caused by gas retention is avoided; meanwhile, the edge of the plug is tightly attached to the inner wall of the test tube, liquid flowing back along the tube wall is physically blocked, splashing loss and cross contamination are prevented, the dual functions of exhaust and liquid sealing are achieved, an infrared heating plate is adopted to be matched with a heat insulation layer, non-contact heating is directly conducted on the bottom of the test tube, rapid evaporation is achieved, and temperature distribution is uniform; by combining the visual design that the bottom of the test tube is completely exposed, the concentration process can be observed in real time, excessive dry burning is prevented, the background plate and the direction-adjustable LED light bar are integrated, and the liquid level observation definition is remarkably improved through the high-contrast background and lateral light supplement.

The invention relates to the technical field of oil well oil and gas production equipment, in particular to application of a closed oil well oil and gas production metering device, which is characterized in that the closed oil well oil and gas production metering device is provided with a three-phase separator, a flowback liquid recovery tank, a crude oil tank and a gas combustion torch / gas collector, a gas control valve and a gas pressure regulating valve are arranged on the gas conveying pipeline, the gas pressure regulating valve is arranged between the gas control valve and the gas combustion torch / gas collector, a low-pressure connecting pipeline is further arranged, one end of the low-pressure connecting pipeline is connected into the gas conveying pipeline between the gas control valve and the gas pressure regulating valve, and the other end of the low-pressure connecting pipeline is communicated with a crude oil tank; the crude oil tank, the gas conveying pipeline, the gas control valve, the gas pressure regulating valve and the low-pressure connecting pipeline form a low-pressure subsystem, the amount of gas remaining in the low-pressure subsystem is adjusted by adjusting the pressure of the gas pressure regulating valve on the gas conveying pipeline, so that the crude oil tank is in a pressure maintaining state, and the system pressure is controlled within 2.5 Mpa.

The utility model discloses a shutter cap hood tray, which belongs to the technical field of chemical engineering, and adopts the technical scheme that the shutter cap hood tray comprises a retention tray, a riser tube is fixedly connected to the inner side of the retention tray, a downcomer is fixedly connected to the bottom of the retention tray, and a shutter shunting mechanism is movably connected to the top of the retention tray. A flow adjusting mechanism is movably connected to the inner side of the downcomer, the gas-liquid interaction efficiency and the separation effect can be remarkably improved through a dynamic louver blade structure, the gas retention time is prolonged through a multi-stage retention space formed by a semispherical tower cover and a liquid layer, and bubbles fully react in the liquid layer; the louvre blades driven by the servo motor swing back and forth to refine an airflow path, increase the gas-liquid contact area and strengthen mass transfer; thirdly, dead angles, prone to scale deposition, of a static structure are eliminated through dynamic swing, and meanwhile impurity accumulation is restrained through shearing force generated by mechanical movement; finally, the maintenance cost is reduced while the separation efficiency is improved.

The invention relates to a gas generator with a gas inlet supercharging structure. The gas generator comprises a generator body, an engine, double turbochargers, double intercooling box type intercoolers and a mixer. The generator is connected with an output shaft of the engine, the exhaust end of the engine drives the double turbochargers to supercharge air and fuel gas independently, and the risk of premixed combustion is avoided. Pressurized gas enters the corresponding intercooling boxes, is cooled and then converged into the mixer, and then is introduced into an air inlet of an engine, so that the problem of tempering of an air inlet of a traditional premixing unit is solved. The intercooling box is provided with an S-shaped air channel to prolong the gas retention time, a rectangular heat exchange groove is formed in the side wall, hollow heat dissipation fins (cooling water is introduced) are arranged in the groove in parallel and matched with a heat dissipation fan on the side wall of the intercooler to form double heat exchange of water cooling and air cooling, and the heat exchange efficiency is greatly improved. The heat exchange groove is provided with double cleaning brushes, heat dissipation is prevented from being affected by dust and oil stains, and the heat dissipation structure is simplified. The water pipe is provided with a branch pipe connector with an electromagnetic valve, water stain cleaning equipment can be connected, and water scale in the fins can be cleaned regularly.

This invention discloses a method and system for removing hazardous gases from a special gas supply equipment, relating to the field of hazardous gas removal technology. The method includes: numerically simulating the gas flow path inside the equipment to identify hazardous gas retention areas; applying a magnetoacoustic coupling field to the retention areas to desorb the hazardous gases and migrating the desorbed gases to a preset safe treatment area; extracting and fusing optical and spectral features using a learnable encoder to obtain the physicochemical characteristics of the residual hazardous gases; constructing a digital twin model to simulate the residual diffusion behavior and retention risk of the residual hazardous gases within the equipment; optimizing the parameters of the magnetoacoustic coupling field and iteratively optimizing it until the hazardous gases are completely removed from the equipment. This invention improves the efficiency and directionality of hazardous gas removal, reduces the safety risks caused by residues, and thus ensures the stability of the special gas supply equipment operation and the safety of the operating environment.

The utility model relates to an improved water pump shell, belongs to the field of water pump accessories, and provides the improved water pump shell aiming at the problem that an existing pump shell is poor in exhaust effect, the improved water pump shell comprises a pump shell body, a water inlet pipe and a water outlet pipe which are connected into a whole, the pump shell body is annular, one end of the pump shell body is connected with a motor, and the water inlet pipe and the water outlet pipe are both located at the top of the pump shell body; the first exhaust valve is arranged on the top of the water inlet pipe from top to bottom, and the second exhaust valve is arranged on the side portion of the water outlet pipe from top to bottom. The water inlet pipe and the water outlet pipe are located at the top of the pump shell, gas located at the high position conveniently enters the water inlet pipe and the water outlet pipe, when water enters the pump shell from the water inlet pipe, the gas is easily squeezed to the high position of the water inlet pipe, the first exhaust valve is arranged at the top of the water inlet pipe, and the gas at the high position can be effectively prevented from remaining; the second exhaust valve is arranged on the side of the water outlet pipe, gas exhaust is facilitated, gas residues can be reduced, and the exhaust effect is further improved.

The invention discloses a scrubber for gas containing alkali mist. The scrubber comprises a vertical tower body, a scrubbing solution pool arranged at the bottom of the tower body, a gas outlet located in the top of the tower body and a demister arranged below the gas outlet. An alkali-containing mist gas inlet is formed in the lower part of the tower body, and a spraying reaction area is formed in the middle; and at least two spraying layers are arranged in the spraying reaction area. Through the combined design of the multiple adjustable spraying layers and the efficient demister, the alkali mist capture rate is remarkably improved, the gas-liquid contact area is increased through micron-sized liquid drops generated by the atomizing nozzles, and the gas retention time is prolonged through the rotational flow plate and the guide cylinder; the two-stage baffling demister efficiently separates entrained liquid drops through inertia collision, and scale formation and blockage are avoided in combination with a surface anti-corrosion coating. The automatic pH control system optimizes the concentration of alkali liquor in real time, ensures that the neutralization reaction is fully carried out, reduces the use of chemicals, is convenient to maintain due to the modular structural design, and can adapt to alkali fog load changes under different working conditions.

The invention relates to a pressure-maintaining gas-maintaining light-weight multidirectional remote pressure-maintaining triggering device and method. The pressure-maintaining gas-maintaining light-weight multidirectional remote pressure-maintaining triggering device comprises a coring device connecting pipe, a triggering main body and a water path adjusting device, wherein the top surface of the coring device connecting pipe is provided with a first spiral guide surface and a second spiral guide surface; the coring device connecting pipe is provided with a first hole channel and a second hole channel, the top opening of the first hole channel is formed in the first spiral guide surface, and the top opening of the second hole channel is formed in the second spiral guide surface; a piston on the trigger body can move in the piston cavity, and the bottom of the first hole channel communicates with the interior of the piston cavity. And the inclined surface of the waterway adjusting device is matched with the first spiral guide surface and the second spiral guide surface. According to the invention, sample recovery and pressure-maintaining storage of pressure-maintaining coring can be realized remotely; the waterway adjusting device can be placed in a drill hole from a roadway orifice and sent to the bottom of the hole under hydraulic drive, and after the waterway adjusting device is in place, a normal circulating waterway can be effectively blocked, differential lifting force can be stably provided, and remote triggering of a pressure maintaining coring device can be stably and reliably achieved.

The present invention provides a battery pack capable of adequately ensuring the gas retention volume of the discharged gas. The battery pack is characterized by comprising: a battery cluster (12) formed by stacking a plurality of individual cells (13) having a gas discharge valve (26) on the upper surface; a fixing part (16) for fixing the battery cluster; a busbar housing (17) disposed on the battery cluster (12); a wiring harness housing (24) disposed on the busbar housing (17); and a busbar housing cover (18) covering the busbar housing (17) and the wiring harness housing (25) from above, wherein a gas discharge space (25) is formed in the busbar housing (17) and the wiring harness housing (24) communicating from the gas discharge valve (26) to the busbar housing cover (18).

The utility model relates to the technical field of injection molds, and discloses a mold structure for a small-angle rear mold to penetrate through the side edge of a front mold and preventing burrs, the mold structure comprises a front mold body and a first connecting seat, an upper mold seat is arranged at the top end of the front mold body, and guide grooves are formed in four corners of the bottom end of the upper mold seat. According to the mold structure capable of rubbing and penetrating the side edge of the front mold by the small-angle rear mold and preventing excessive flash, parts such as the exhaust hole are arranged, the side edge of the front mold is designed into a small-angle inclined surface, the resistance during rubbing and penetrating of the rear mold is reduced, the side edge of the front mold is chamfered, tight contact during mold closing of the mold is ensured, excessive flash is prevented from being generated on a protruding edge, and the service life of the mold structure is prolonged. By means of the positions and the number of the exhaust holes, it is ensured that when the rear mold body penetrates through the side edge of the front mold in a rubbing mode, gas can be smoothly exhausted, the phenomenon that air or gas is left in a mold cavity and consequently burrs are caused is avoided, and the problem that burrs are likely to be caused when the rear mold penetrates through the side edge of the front mold in a rubbing mode is solved.

Provided is a battery pack capable of sufficiently securing a gas retention capacity for discharged gas.　The battery pack is characterized by having: a battery group (12) which has a plurality of unit batteries (13) layered therein and has a gas discharge valve (26) on the upper surface; a fixing part (16) to which the battery group is fixed; a bus bar case (17) which is disposed on the battery group (12); a harness case (24) which is disposed on the bus bar case (17); and a bus bar case cover (18) which covers the bus bar case (17) and the harness case (25) from above. The battery pack is also characterized in that a gas discharge space (25) continuous from the gas discharge valve (26) to the bus bar case cover (18) is formed in the bus bar case (17) and the harness case (24).

This utility model discloses a drainage device for medium and low pressure drainage pipes. Its structure includes a steam pipe and a main drainage pipe connected to the steam pipe. An isolator and a drain valve are installed in the main drainage pipe, and an external filter is installed between the isolator and the drain valve. By adopting the above technical solution, the drainage device for medium and low pressure drainage pipes provided by this utility model, without changing the original structure of the drain valve, can effectively block pipe wall erosion carried by condensate by installing an external filter at the front side of the drain valve inlet. Furthermore, regular cleaning of the filter screen reduces the frequency of maintenance on the drain valve itself. In addition, because the external filter and the drain valve are installed horizontally, condensate or steam can pass through the filter screen evenly and continuously, reducing the risk of gas retention, avoiding intermittent drainage problems, and ensuring that impurities are evenly deposited at the bottom of the filter screen, preventing impurities from directly impacting a specific point on the filter screen when installed vertically, thus reducing localized wear on the filter screen.

The invention belongs to the technical field of lead-bismuth reactors, and particularly relates to a monitoring and positioning device and method for damage of a lead-bismuth reactor fuel rod. The device comprises a covering cover, the covering cover is mounted above a reactor core, and covering gas is stored in a formed covering space; the covering space is connected with a sampling gas retention container located outside the reactor core through a sampling branch pipeline A, the other end of the sampling gas retention container is connected with a gas pump, and the gas pump is connected to the covering space through a pipeline to form a loop for sampling the covering gas; the device further comprises a sampling cover and a sampling branch pipeline B. The sampling cover is located in the covering space and above the fuel rod, and the upper end of the sampling cover is located in the covering space and connected with the sampling gas retention container through the sampling branch pipeline B. According to the method, in the operation process of the lead-bismuth reactor, if the fuel rod is damaged, rapid identification and positioning can be achieved, and a basis is provided for subsequent operation of the reactor and replacement of the damaged fuel rod or assembly.

A medical gas retention system including a nozzle having an inlet, an outlet, and a fluid flow passageway extending from the inlet to the outlet and configured to convey medical gas from the inlet and through the outlet. The medical gas retention system also includes an arm coupled to the nozzle and including an occluding surface. The arm has a first position and a second position different from the first position, wherein the arm is biased toward the second position and the occluding surface automatically closes the outlet when the arm is in the second position to prevent medical gas flow through the outlet.

The application discloses an improved interdigital jet flow field device and a proton exchange membrane water electrolysis hydrogen production device thereof, and aims to solve the problems of uneven distribution of reactants, gas stagnation and local hot spots existing in the traditional flow field. Traditional flow field design, such as parallel flow channel and serpentine flow channel, usually has certain limitations in fluid flow resistance, mass transfer efficiency and thermal management uniformity, and is difficult to meet the needs of high-performance water electrolysis device; through the optimization of the geometric structure and the gas discharge strategy, the uniform distribution of the reactants is promoted, the gas stagnation area and the local high heat spot are reduced, so that the current density distribution uniformity and the heat production management uniformity are realized. The flow field adopts the jet channel structure arranged in a staggered mode, and the under-rib opening channel is designed in an optimized mode, so that the vertical flow speed is improved, the pressure drop is reduced, and the gas-liquid interface reaction efficiency is improved.

This utility model discloses a waste heat recovery device for a disc dryer, belonging to the field of waste heat recovery technology. The device includes a base frame and a gas path mechanism. A water path mechanism for heating water is fixed on the base frame, and a gas path mechanism for exchanging heat between the water and gas is fixed inside the water path mechanism. A filter mechanism is fixed at the water inlet of the water path mechanism. Through the arrangement of the water and gas path mechanisms, this utility model allows hot gas to rotate and advance in a spiral direction, ensuring that all parts of the gas fully contact the pipe wall, improving heat exchange efficiency, extending gas residence time, and also changing the flow pattern and residence time of the water. Furthermore, through the inclusion of an electronic three-way valve and a latent heat recovery mechanism, this utility model can recover the latent heat of the recovered warm and humid gas when the temperature is low in winter, further improving the utilization rate of heat in the gas.

The invention discloses a CVD (Chemical Vapor Deposition) system and method for depositing a silicon carbide coating through low-pressure pulse type gas supply. The system comprises a furnace body, a gas distribution disc, a gas supply loop, an atmosphere switching module, a vacuum buffer cavity and a control unit, the vacuum buffer cavity is used for controlling the furnace cavity pressure of the furnace body to be maintained in a low-pressure environment of 50-200 Pa, and the control system is used for controlling precursor gas supply and inert gas purging to be periodically switched. And thus, periodic stable refreshing of the boundary layer reaction atmosphere is realized. According to the method, through alternate operation of pulse gas supply and purging, dynamic refreshing of the reaction atmosphere is achieved, a boundary layer is effectively thinned, gas retention is eliminated, the effective flux of the reaction gas reaching the surface of a matrix is improved, and then the compactness, uniformity and surface quality of the silicon carbide coating are remarkably improved. Therefore, the problems of boundary layer enrichment, raw material waste, uneven coating and the like in the traditional continuous gas inlet CVD process are solved.

The application discloses a kind of oil pump air circulation rate measurement method based on oil-gas circulation test, it is related to oil-gas two-phase flow test and pump performance evaluation technical field, comprising the following steps: obtaining the gas volume fraction, flow fluctuation amplitude and pressure fluctuation amplitude corresponding to each time position of oil-gas circulation test, point calibration according to time advancing order, the gas volume fraction and the corresponding relationship of each time position are bound, and the initial change segment that the difference of gas retention and release is formed is characterized.It is guaranteed that the consistency of air circulation rate on time axis by identifying gas retention and delayed release behavior, and differentiating and moving forward distribution processing to gas volume fraction, time offset data recovery corresponding relationship, air circulation rate measurement stability and accuracy are improved by progressive compression and synchronous traction, sudden change is converted into continuous change process, so that gas change trend can reflect real transport state.

The utility model discloses an air uniformizing smoke sucker which comprises a machine shell, the machine shell is provided with a smoke exhausting cavity, the smoke exhausting cavity is communicated with the outside through a smoke outlet and is provided with a main smoke exhausting cavity and a flow guide smoke cavity, at least part of the main smoke exhausting cavity is staggered with the smoke outlet, the flow guide smoke cavity extends to the smoke outlet from the main smoke exhausting cavity, a wind wheel is arranged in the main smoke exhausting cavity, and an air uniformizing plate is arranged in the flow guide smoke cavity. The air uniformizing plate extends around the outer side of the wind wheel in the direction far away from the smoke exhaust port to divide the flow guide smoke cavity into two air uniformizing cavities communicated with the main smoke suction cavity, and in the two air uniformizing cavities, the flow area of the air uniformizing cavity close to the wind wheel is smaller than that of the other air uniformizing cavity. The air uniformizing plate is arranged in the flow guide smoke cavity and extends around the outer side of the wind wheel in the direction far away from the smoke exhaust port to divide the flow guide smoke cavity into two air uniformizing cavities communicated with the main smoke exhaust cavity, so that the internal composition of the smoke exhaust cavity is changed, vortexes cannot be formed in the flow guide smoke cavity when the wind wheel rotates, and gas is prevented from being retained in the smoke exhaust cavity; and noise is eliminated while the air outlet volume of the smoke outlet is increased.

The invention provides a transformer with a liquid cooling structure, and relates to the field of transformers. A shell is fixedly arranged at the top of the base, dust screens are fixedly arranged in the two sides of the shell, and a heat absorption assembly is fixedly arranged in the shell; a cooling structure is fixedly arranged between the base and the outer side of the shell, and a dustproof structure is fixedly arranged on the outer side of the cooling structure. An auxiliary mechanism is fixedly arranged at the top of the base, an exhaust assembly is fixedly arranged at the top of the auxiliary mechanism, cooling oil can be supplemented in time through the auxiliary mechanism and the exhaust assembly, and it is ensured that an oil circulation system is always in the optimal working condition; bubbles can be effectively discharged in the circulation process of cooling oil; the heat dissipation efficiency is prevented from being influenced by gas retention, and the problem that timely supplement of cooling oil is difficult to realize due to lack of an automatic oil supplement function is solved; and automatic exhaust is not convenient.

The utility model discloses an air purification disinfection device capable of prolonging gas residence time, which comprises an outer pipe body, a movable door is arranged on the front side of the outer pipe body close to the top, the top and the bottom of the outer pipe body are closed, the top of the outer pipe body is connected with an air inlet pipe in a penetrating manner, and the air inlet pipe is connected with an air outlet pipe. The bottom of the air inlet pipe is movably connected with a rotating pipe through a bearing, a cylindrical block is attached to the bottom of the rotating pipe, the cylindrical block is connected into the outer pipe body through a bolt, and the bottom of the cylindrical block is connected with a barrel through a bolt. According to the technical scheme, the rotating shaft, the arc-shaped stop block, the spiral groove, the rotating block, the circulating hole and other components are matched with one another, so that the gas retention time can be effectively prolonged, a disinfectant can be effectively contacted with entering gas, the disinfection efficiency is improved, intermittent gas inlet can be effectively performed, and the disinfection effect is improved. Therefore, the gas can flow in slowly, and the working efficiency and the use efficiency of the device are improved.

To provide an optimal design system that in order to completely discharge the molten metal in the product part that has entrained gas, estimates the flow direction of the molten metal during filling, and thereby, automatically designs the position and volume of the overflow.SOLUTION: For the purpose of preventing gas entrainment defects when manufacturing predetermined die casting products by casting, an optimal overflow design method performs calculations by computational fluid dynamics (CFD) using a computer. The method includes the following steps (1) and (2): an overflow position determination step (1) of determining an installation point of overflow of the die casting product; and an overflow volume determination step (2) of determining, after determining an initial shape of the overflow, a volume and shape of the overflow whose volume corresponding to a volume that is based on an evaluation (2-1) of the overflow gate and an evaluation (2-2) of the inside of the product.SELECTED DRAWING: Figure 19