54results about How to "Solve the airtight problem" patented technology

The invention relates to technology to transform a closed apple orchard through the combination of grafting and tree form reshaping and discloses a grafting and tree form reshaping method of three-branch inarching of the closed apple orchard. Three-branch grafting is carried out at the root of a fruit tree, three scions are grafted at the subcutaneous section and comprise one long scion and two short scions; after the grafted branch buds, the central tree trunk is formed through three-branch inarching, the height of the tree in the current year can reach up to about 2.5m, and the formed central tree trunk can be pruned according to different requirements of the tree form to be reshaped from the next year, thereby realizing improvement of fruit tree breed and fruit tree form in a short period of time.

The invention provides an explosion-proof and fire-resistant breathing valve, which is composed of a valve cover, a valve body and an air flow passage, the valve cover and the valve body are fixedly connected by bolts, the air flow passage is placed at the central axis inside the valve body, and a positive pressure valve is also included The positive pressure valve disc is vertically fixed on the upper end of the air flow passage through the valve disc motion control device, and the negative pressure valve disc is vertically fixed on the lower end of the air flow channel through the valve disc motion control device. The positive pressure valve disc and The negative pressure valve disc is a circular air bag; the positive pressure valve disc and the negative pressure valve disc are designed as a circular air bag structure, which increases the lubricity of the valve disc and effectively solves the airtightness of the existing breathing valve. The technical problem that can not be balanced with flexibility, and the structure is simple and easy to operate.

The invention provides a deactivated catalyst regeneration method, which comprises: (1) making a to-be-regenerated hydrogenation catalyst contact an oxygen-containing gas, and carrying out charcoal burning treatment to obtain a catalyst A; (2) making the catalyst A contact an organic compound solution, and carrying out heat treatment to obtain a catalyst B; and (3) introducing an organic sulfide and hydrazine hydrate into the catalyst B, and carrying out heat treatment to obtain a regenerated catalyst. The regeneration method of the present invention can increase the activity of the regenerated catalyst.

The invention relates to an integrated lift translation protective sealing door. Wherein, its hinge leaf is fixed with upper axle base and lower axle base; said two bases are connected to the prolonged hinge leaf axle via bearings; the upper and lower hinge leaf plates are connected to the upper and lower connecting base plates via the upper and lower torque balance translation support bases; one end of upper and lower torque balance translation support bases is connected to the upper and lower connecting base plate pin axles, while the another end sheathes the prolonged hinge leaf axle; there are spaces between the balance translation support bases and the hinge leaf axle base, and between the pin axle holes and the connecting base plate pin axles; the jack lifter is arranged between the upper hinge leaf and the lower hinge leaf, while its square head of lift end is supported inside the supporting translation base; there is space between the square head and the wall of supporting groove; the inner wall of supporting groove has concave rolling channel embedded with rolling balls. The invention can be widely used in protective projects.

The invention provides a hydrogenation catalyst regenerating method, which comprises: (1) making a to-be-regenerated hydrogenation catalyst contact an oxygen-containing gas, and carrying out charcoalburning treatment to obtain a catalyst A; (2) making the catalyst A contact an organic compound solution, and carrying out heat treatment to obtain a catalyst B; and (3) introducing hydrazine hydrateinto the catalyst B, and carrying out heat treatment to obtain a regenerated catalyst. The regeneration method of the present invention can increase the activity of the regenerated catalyst.

The invention relate to an upper rigid centenary system electrical subway integral lifting translation type interval partition door, comprising a interval partition door leaf over a track, a door frame, a hinge connecting the door leaf with the door frame and a locking device, the joint between the inside surface upper edge of the interval partition door leaf and the inside surface of the door frame is equipped with an upper part movable cover plate device. The lower surface of the upper part movable cover plate device and the upper surface of an upper lifting sealing device form a sealing abutted surface. The upper part of the upper lifting sealing device, relative to a rigid catenary system and the lower surface of a wire, is fixed with a profile modeling sealing rubber block. By using an integral lifting translation type hinge and setting the upper lifting sealing device, closing in place is realized without the wire being disconnected, the transformation from peacetime to wartime is fast. In addition, the upper part movable cover plate device and the upper lifting sealing device employ profile modeling sealing structure, which effectively solves the closing difficulty of the upper rigid catenary system, the structure is simple, and the closing property is reliable.

The invention discloses a testing apparatus for research on reducibility of a single-particle iron ore, which belongs to the field of ironmaking in the metallurgical industry. The testing apparatus comprises a reducing furnace, a quartz reduction tube, a weighing device, a protective device, a supporting device, a heating control device and a gas control device, wherein a furnace chamber and a heating device are arranged in the reducing furnace, the quartz reduction tube is fixed in the furnace chamber of the reducing furnace through the supporting device, the iron ore is disposed in a hanging basket and then hung below the weighing device through a suspension wire, the quartz reduction tube is provided with a reducing gas inlet and two reducing gas outlets, a thermocouple and a porous plate are arranged in the quartz reduction tube, the supporting device is provided with a water sealing groove, a protective cover is connected with the water sealing groove so as to realize sealing of the whole apparatus, flow of reducing gas is controlled by a mass flow controller, and a computer is connected with the weighing device to record data. The testing apparatus provided by the invention has the advantage that research on reducibility of the single-particle iron ore is realized through improvement of a weighing mode of a conventional determination apparatus for reducibility of iron ore.

The invention relates to an air-spring-based semi-active control hydraulic suspension. Through the air-spring-based semi-active control hydraulic suspension, the problem that the bandwidth of absorbable vibration frequency bands is small when an engine suspension absorbs external vibration is solved. The air-spring-based semi-active control hydraulic suspension achieves the effects of being capable of conducting full-band absorption on the absorbable vibration frequency bands from low frequency to high frequency, reducing vibration noise in a cab and improving the riding comfort. The air-spring-based semi-active control hydraulic suspension is composed of an upper suspension assembly, a lower suspension assembly and a cylindrical gas chamber. A suspension internal cavity is divided into anupper liquid chamber, a middle liquid chamber and a lower liquid chamber by an inertia channel and decoupling membranes. A T-shaped groove inertia channel can increase throttling loss and return lossof liquid flowing through the internal cavity and increase damping force. The cylindrical gas chamber formed by the two decoupling membranes communicates with an external piston. The direction and magnitude of current in an electromagnetic coil in the piston can be adjusted to realize up-down movement of the head of the piston, so that the pressure intensity of gas in the cylindrical gas chamberis adjusted, the rigidity of the decoupling membranes is dynamically adjusted, and the autokinetic degree of the suspension is dynamically changed finally. Accordingly, the purpose of full-band vibration absorption is achieved.

The invention relates to the technical field of toys, and discloses a filling device for solving the problems that quantitative filling cannot be achieved and tightness is poor during toy filling. The filling device comprises a shell, the whole device is supported through the shell, through cooperative use of a down feather outlet, a clamping plate, a first connecting rod and a half gear, automatic clamping is achieved during down feather filling, manual holding is not needed for control, down feather leakage in the down feather filling process is avoided, down feather waste is reduced, meanwhile, the leaked down feather is prevented from influencing the processing environment of a production line, quantitative down feather filling is achieved during down feather filling through cooperative use of a negative pressure pipe, a push rod, a first rotary disc and a second rotary disc, manual control is not needed, errors are reduced, negative effects on hand feeling, quality and the like of toys due to too small down feather filling amount are avoided, quantitative down feather filling and automatic clamping are linked through matched use of a disc and a limiting sleeve, linkage of the whole device is improved, and the operation is simpler.

The invention discloses a pneumatic supercharging excitation device and method oriented to magnetic resonance elasticity imaging. The pneumatic supercharging excitation device comprises a vibration generator and a bridging mechanism, wherein the vibration generator comprises a T-type push rod, the edge of a round face of the T-type push rod is connected with a vibrating end airtight air bin through a vibrating end supporting film in a sealed mode, a vibrating end sealing film is arranged in the vibrating end airtight air bin, and opposite balance springs are arranged below the round face of the T-type push rod; the bridging mechanism comprises a miniature air cylinder, an air pressure gauge and a bridging head, a bridging end sealing film is arranged in the bridging head, the lower edge of the bridging head is connected with the edge of an upper round face of an I-type push rod through a bridging end supporting film, and tension springs are arranged at the two sides of the I-type push rod. As the pressure intensity of air in a guide pipe is increased, propagation speed of mechanical waves in the guide pipe is higher, and energy loss of the mechanical waves is smaller. Excitation on tissue in the human body is enhanced, and therefore elasticity imaging quality is higher.

The invention relates to a cast-in-situ thermal-insulation integrated slope roof structure. The cast-in-situ thermal-insulation integrated slope roof structure is characterized in that a roof comprises purline, inner decoration bearing bodies, a thermal-insulation layer and roof tiles, wherein the inner decoration bearing bodies are fixedly connected with the purlines, the roof tiles are mounted above the inner decoration bearing bodies through support components, the lengths of the inner decoration bearing bodies and the roof tiles are at least equal to the span between two adjacent purlines, a thermal-insulation layer accommodating cavity is formed between the inner decoration bearing bodies and the roof tiles, sealing plates are mounted between the bottom of the thermal-insulation layer accommodating cavity and the lateral roof tiles and between the bottom of the thermal-insulation layer accommodating cavity and the inner decoration bearing bodies, the upper portion of the thermal-insulation layer accommodating cavity is of an open structure to form a cast-in-situ thermal-insulation layer pouring opening, and a ridge cover plate is fixedly mounted above the cast-in-situ thermal-insulation layer pouring opening after pouring. The invention further discloses a construction method based on the cast-in-situ thermal-insulation integrated slope roof structure. The cast-in-situ thermal-insulation integrated slope roof structure is simple in process, high in construction efficiency, long in service life, capable of fundamentally achieving thermal insulation and leakage prevention, and the like.

The invention provides a floor heat preservation construction process achieved through ultrafine inorganic fiber spraying. The floor heat preservation construction process includes the first construction step of construction preparation, the second construction step of finished product protection, the third construction step of base layer processing, the fourth construction step of material preparation, the firth construction step of spraying construction, the sixth construction step of surface finishing, the seventh construction step of detail processing, the eighth construction step of site clearing and the ninth construction step of quality acceptance. According to the principle that ultrafine inorganic fiber granulated wool and water-based environment-friendly adhesives are combined, the inorganic fiber granulated wool and the water-based environment-friendly adhesives are sprayed to the concrete surface within the design range through a special fiber spraying machine at the same time, and a thermal insulation and heat preservation layer which is free of joint seams, closed, overall stable, elastic, and capable of reducing noise, absorbing sounds and preventing fire is formed after natural drying; compared with a traditional heat preservation technology, the defects that in traditional thermal insulation and heat preservation construction, the number of seam joints is large, the sealing performance is poor, installation procedures are complex, aging and deforming are prone to happening, the number of potential quality hazards in the later period is large, and investment is heavy are fundamentally overcome.

The invention belongs to the technical field of catalyst screening, and discloses a catalyst negative pressure suction and positive pressure conveying and screening method and system. To-be-screened catalysts of a converter are conveyed into a gas-solid separation bin by negative pressure through a material suction hole, and a material level control system of the gas-solid separation bin discharges the catalysts to a catalyst vibration screen through a discharger according to the height of the material level; after the catalysts are separated by multiple stages of screens, the small particle catalysts which are powdery and do not meet the requirements enter a collection hopper of the vibration screen and are airtightly collected by a screw machine; the particle catalysts and ceramic ballsenter respective collection hoppers and are bagged, returned and utilized; and as a certain negative pressure is formed in a screening machine, catalyst dust generated in the screening process is sucked into a bag type dust collector along with air, filtered waste gas is emptied by a Roots blower, and the residual catalyst dust is conveyed to a related unit for treatment. The system has the characteristics of no dust leakage and small catalyst takeout, screening and refilling loss, and the work environment in the catalyst screening process is improved.

A multi-station vacuum annealing machine comprises a machine frame, a workbench, a plurality of vacuumizing chambers, vacuumizing mechanism, a heating mechanism and a driving mechanism, wherein the workbench is arranged on the machine frame, the multiple vacuumizing chambers are arranged on the workbench, the vacuumizing mechanisms are communicated with the vacuumizing chambers correspondingly, the heating mechanism is used for heating one or more vacuumizing chambers, and the driving mechanism is used for driving the vacuumizing chambers and the heating mechanism to move relatively. Each vacuumizing chamber comprises a base arranged on the workbench and an upper cover cap capable of being matched with the base in a sealed manner, and each base is communicated with the corresponding vacuumizing mechanism. The heating mechanism comprises a lifting module and an electromagnetic heating coil arranged at the lower end of the lifting module, and the electromagnetic heating coils are locatedright above the one or more vacuumizing chambers. According to the multi-station vacuum annealing machine, a workpiece can be independently heated and annealed, so that the workpiece to be annealed is uniformly heated, and the annealing quality is improved; and circulation and uninterrupted automatic operation of heating annealing, heat preservation, cooling and heating annealing can be conducted, the production is planned, manual intervention is not needed, the production efficiency is high, the energy consumption is low, and the environment friendliness is achieved.

The invention provides a household central fresh air system installation and maintenance process flow, and belongs to the technical field of fresh air system installation and maintenance. A householdcentral fresh air installation and maintenance process is promoted and improved in terms of an existing installation mode standard. The effects that a fresh air installation pipeline is sealed, an airpipe is cleaned, disinfected and sterilized in the installation process, and functional parts such as an observation window, and a cleaning port are added are mainly realized. More importantly, the process flow of cleaning, disinfection and sterilization of a fresh air pipeline during daily use is added. Four patent products of air pipe cleaning and disinfection equipment, a household central fresh air system pipeline cleaning system, a special air cap for cleaning the fresh air pipeline and an ultra-thin hose clamp are used, the cleaning port and the observation window are designed, and a plurality of processes are combined to improve household central fresh air installation and cleaning, disinfection and sterilization procedures, so that air input into the room is not subjected to secondary pollution, and the health of residents is guaranteed.