12results about How to "Large ventilation" patented technology

The utility model discloses a fire grate segment, a fire grate frame and a small garbage incinerator, and belongs to the technical field of environmental protection. The fire grate segment comprises a fire grate segment cover plate, a fixed shaft position and a plurality of parallel rib plates are arranged at the lower end of the fire grate segment cover plate, and vent holes are formed in the side end of the fire grate segment cover plate. A vent groove is formed in the upper surface of the fire grate segment cover plate; the fire grate segments are fixed through the fixing shaft positions, the heat dissipation performance of the fire grate segments is improved through the rib plates, and the ventilation capacity of the fire grate segments is increased through the ventilation holes and the ventilation grooves. According to the fire grate segment disclosed by the utility model, the plurality of rib plates are longitudinally arranged in the fire grate segment cover plate, so that the strength is ensured, and the heat dissipation performance of the fire grate is improved; by arranging the first axial position and the second axial position, the fire grate segment is prevented from eccentric wear and tilting to a certain extent, the use requirement of the garbage incinerator can be met, the structure is simple, and meanwhile the production and maintenance cost is reduced by adopting an integrated casting.

The invention provides supercritical extraction and separation equipment applied to the field of supercritical equipment, through the arrangement of a pressure reduction pipe bundle, when a supercritical fluid is changed into a gas state through temperature rise and pressure reduction, the pressure of gas overflow can be effectively dispersed, on one hand, gas concentrated on one pipeline in the prior art is dispersed into a plurality of pressure expansion pipes, and on the other hand, the pressure of the gas is reduced; on the other hand, under the action of the gas pressure, the multiple pressure expansion pipes gradually expand and abut against one another, the ventilation capacity of the pipeline in unit time can be increased, gas emission is accelerated, the multiple expanded pressure expansion pipes can also conduct mutual extrusion action, and then part of outward pressure of gas is offset; and the pipeline is further protected and is not easy to damage.

The invention discloses a graded heterogeneous fixed bed gasifier, which comprises: a pressure-bearing shell, the top of which is provided with a material inlet, the bottom of which is provided with a slag outlet, the pressure-bearing shell is provided with a gasifying agent inlet, and the upper part of the side wall of the pressure-bearing shell is provided with a first synthesis gas outlet; the fire grate is arranged at the lower part of the pressure-bearing shell, an air outlet channel in the radial 0.7-0.8 D of the fire grate is a central channel, the rest air outlet channels are edge channels, and the ratio of the central channel to the edge channels is (2-3): 1. The ratio of the center channel to the edge channel in the fire grate is changed, the ventilation capacity of the center channel of the fire grate is increased, the flame height of the fire grate is increased, and then the height of a gasification bed layer in a hearth and the handling capacity of raw materials are increased.

This invention relates to a strain of *Verticillium chlamydosporium*, its culture method, and its applications, belonging to the field of microbial technology. The *Verticillium chlamydosporium* Vc-GXWFY-01 was deposited on April 12, 2023, at the China General Microbiological Culture Collection Center (CGMCC), located at No. 3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing, Institute of Microbiology, Chinese Academy of Sciences, with accession number CGMCC NO.40400. This strain has a high spore yield and exhibits significant functions in controlling nematodes in agricultural and forestry crops and promoting crop growth. Its control effect on root-knot nematodes reaches 50-87%, increasing crop yield and significantly improving economic benefits. The solid-state fermentation medium of this invention ensures sufficient organic matter for the strain while also increasing aeration within the medium, greatly enhancing the production of *Verticillium chlamydosporium* and the number of chlamydosporin spores, producing up to 9.4 × 10⁻⁶ spores. 7 ~2.2×10 8 The number of conidia is 2.7 × 10⁶ / g. 9 ~2.9×10 9 per g.

This invention relates to the field of heat exchange cabinet technology, and discloses an underground energy-saving heat exchange cabinet with adjustable ventilation pipe density. The cabinet includes a cabinet body with balance supports on both sides of its outer wall to maintain balance. The interior of the cabinet consists of two independent chambers: an equipment chamber and a heat exchange chamber. Inside the heat exchange chamber is a heat exchange seat, which comprises three independent processing chambers, arranged sequentially from front to back: a phase change chamber, a hot air chamber, and a cold air chamber. By adding and setting an energy-saving exchange mechanism, during operation, this mechanism not only constructs a curved flow channel through baffles and annular channels to slow down airflow velocity and promote sufficient heat exchange between the hot and cold air chambers, thus improving heat exchange efficiency, but it can also utilize phase change energy storage material blocks to recover residual heat from the hot air. This stored latent heat is released to heat the circulating air when temperatures drop sharply at night, preventing equipment malfunctions due to low temperatures.

The utility model relates to the technical field of shoe soles, and discloses an integrated shoe sole with a moxa fragrance sterilization function. The utility model aims to solve the technical problems that in the prior art, the antibacterial and deodorizing effects are poor, the growth of bacteria and fungi in shoes is difficult to effectively inhibit, the environment in the shoes is humid and stuffy, peculiar smell is easy to generate, and the comfort and health of a wearer are influenced. A shoe sole sequentially comprises an upper breathable layer, a middle wormwood sterilization layer and a bottom anti-skid layer from top to bottom. The middle wormwood sterilizing layer comprises a plurality of wormwood microcapsules; the bottom anti-skid layer comprises a toe cap and a shoe tail which are made of PU materials and integrally formed, the toe cap comprises an arc-shaped protection head, a first anti-skid structure is arranged at the bottom of the toe cap, and a second anti-skid structure is arranged at the bottom of the shoe tail. According to the utility model, multiple functions of wormwood sterilization, ventilation, skid resistance and the like are integrated, so that the sanitary environment, the comfort and the walking safety of a wearer are improved, and energy recycling is realized.

The utility model discloses a breather valve with an interchangeable valve seat, and relates to the field of petrochemical engineering. The breather valve comprises a valve body, a valve cover and a valve disc assembly, the valve cover is installed at the top of the valve body, the valve disc assembly comprises a positive pressure valve disc and a negative pressure valve disc, the positive pressure valve disc is arranged on a positive pressure valve seat in the valve body, a micro-leakage structure is arranged between the positive pressure valve disc and the negative pressure valve seat, the negative pressure valve disc is arranged on a negative pressure valve seat 9 in the valve body, and a micro-leakage structure is also arranged between the negative pressure valve seat 9 and the positive pressure valve disc. The micro-leakage structure comprises sealing grooves, sealing gaskets and leakage channels, the sealing grooves and the leakage channels are formed in the top of the positive pressure valve seat and the top of the negative pressure valve seat, the sealing gaskets are arranged at the bottom of the positive pressure valve disc and the bottom of the negative pressure valve disc, the sealing grooves are composed of a plurality of eccentric annular grooves, and the leakage channels are close to the sealing grooves and communicate with the sealing grooves. According to the utility model, the sealing groove is matched with the leakage channel to realize a micro pressure relief function, so that the valve disc is prevented from vibrating when gas pressure borne by the valve disc is close to an opening threshold value, and the problem of noise is solved.

The utility model belongs to the technical field of cell culture, and relates to a grating type cell culture bottle with a breathable top. The grating type top-breathable cell culture bottle comprises a bottom wall, a side wall formed by extending upwards from the bottom wall, and a top wall for sealing the top of the side wall, the top wall comprises a plurality of ventilation parts arranged at intervals, the two ends of each ventilation part are connected with the two opposite side walls, each ventilation part comprises a plurality of ventilation holes formed in the extending direction of the ventilation parts at intervals, and hydrophobic filter membranes are arranged on the ventilation holes in an attached mode. The ventilation part connected with the two side walls is arranged on the top wall, the length of the ventilation part is increased, the ventilation amount is increased, and therefore it is guaranteed that the concentration of gas in the container from top to bottom is uniform. And the air holes in the top wall are arranged in a grating manner, so that the stability of the structure is enhanced. The hydrophobic filter membrane on each air hole effectively prevents liquid and pollutants from invading, and meanwhile, necessary gas exchange is promoted, so that the functionality and the safety of the culture bottle are improved.

The invention provides a gas collecting valve and method for recovering casing associated gas in an oil well shaft and having blowout prevention capacity, one end of a central pipe is connected with an upper joint, the other end of the central pipe is connected with a lower joint, and a sliding sleeve is mounted on the outer wall of the central pipe; the annular metal framework is arranged on the lower connector in a sleeving mode and fixedly connected with the lower connector, and the leather cup is arranged on the annular metal framework. The leather cup clings to the inner wall of the sliding sleeve; the rubber surface of the leather cup and the metal surface of the inner wall of the sliding sleeve form an annular contraction sealing surface, and the upper and lower spaces of the sealing surface are respectively communicated with the exhaust port and the air inlet to form a differential pressure type control switch; a sealing ring is arranged at the joint of the sliding sleeve and the central pipe; a differential pressure type sliding switch is formed among the sliding sleeve, the center pipe and the sealing ring, and therefore the problems that a ground gas collecting valve is large in installation workload, prone to freezing and blocking in winter, short in service life, small in gas collecting amount, large in sealing point number, prone to oil gas leakage and high in safety and environmental protection risk are effectively solved.

The invention relates to the related technical field of experiment teaching appliances, and discloses an intelligent experiment teaching system with a safety monitoring function, which comprises a test bed, a control console arranged on the upper side of the test bed, an alarm arranged on the upper side of the control console, and a first flame sensor and a first smoke-sensitive sensor arranged on the inclined surface of one side of the control console. A first through opening is formed in the upper end wall of the test bed, a placement plate is slidably arranged in the first through opening, a bottom plate is fixedly arranged on the lower side of the placement plate, and a safety monitoring assembly is arranged in the test bed; according to the device, two first sliding plates can be guided and pushed through movement of a guide plate, so that the two first sliding plates are far away from each other, the ventilation capacity of second through openings is increased, inert gas is sprayed into the protective shell through the second through openings, and the oxygen concentration in the protective shell is reduced; and the inert gas is injected to the circuit element at a short distance through the movement of the guide plate, and the temperature of an ignition point of the circuit element is reduced by utilizing the characteristic that the inert gas absorbs heat.

The utility model provides a combined deep air inlet device of a bioreactor and the bioreactor. The combined deep air inlet device comprises an air inlet assembly, an upper air inlet bubbling ring and a lower air inlet microbubble ring, the upper air inlet bubbling ring and the lower air inlet microbubble ring are connected with the air inlet assembly, the upper air inlet bubbling ring is arranged between the upper stirring blade paddle and the middle stirring blade paddle, and the lower air inlet microbubble ring is arranged below the lower stirring blade paddle; the upper air inlet bubbling ring is provided with a first air inlet hole communicated with the air inlet assembly, the lower air inlet bubbling ring is provided with a second air inlet hole communicated with the air inlet assembly, and the first air inlet hole and the second air inlet hole are used for generating bubbles. According to the utility model, the concentration of dissolved oxygen can be greatly improved, and cell damage caused by breakage of bubbles formed in the deep air inlet process in the rising process is reduced.

The utility model discloses a screw locking suction nozzle structure which comprises a main body, the main body is of a rod body structure, an air groove, a bit hole and a positioning hole which are coaxial are sequentially formed in the main body in a communicating mode from top to bottom, the side wall of the main body is provided with an air nozzle matched with the air groove, an adsorption face is formed at the communicating position of the bit hole and the positioning hole, and the air nozzle is communicated with the air groove. A plurality of air guide grooves communicated with the air grooves are formed in the adsorption face, the air guide grooves are distributed in the circumferential direction of the bit hole at equal intervals and communicated with the bit hole, a plum blossom-shaped structure is formed between the air guide grooves and the bit hole, and the positioning hole is used for positioning a screw. According to the utility model, the ventilatory capacity of the adsorption surface is increased, the adsorption force to the screw is improved, the falling and skewing phenomena of the screw in the adsorption process are reduced, and the processing stability is improved.