20results about How to "Reduce structural stress" patented technology

The invention belongs to the field of geological research, and discloses a disintegration instrument capable of eliminating water turbidity in the loess disintegration process and a use method thereof, the disintegration instrument comprises a support, a transparent water tank, a camera and a data acquisition device; a water pump is arranged in the transparent water tank; a plurality of stacked filtering water tanks are arranged on the transparent water tank, a seepage hole-containing water pipe is arranged in the filtering water tank on the top layer, and one end of the seepage hole-containing water pipe is connected with a water outlet pipe arranged on a water outlet of the water pump; fully-paved filter cotton is arranged at the bottom of each filter water tank, every two adjacent layers of filter water tanks are connected through a bottom filter type drain pipe, a connected filter water return pipe is arranged on a water blowing port of the bottom filter type drain pipe of the filter water tank at the bottom layer, and the other end of the filter water return pipe is located in the transparent water tank; a tension sensor is arranged on the bracket, a connecting ring is arranged on the tension sensor, a filter screen for bearing a loess sample is arranged on the connecting ring, and the filter screen is positioned in the transparent water tank. And suspended sediment generated by the test can be effectively removed, and the accuracy of data is ensured.

The utility model provides a one-way valve which comprises a valve seat and a guide sleeve located at one end of the valve seat, the valve seat is provided with a valve seat through hole penetrating through the two ends of the valve seat in the axial direction of the valve seat, the guide sleeve is provided with a guide cavity, the cavity wall of the guide cavity is provided with a circulation structure, and the one-way valve further comprises a spherical valve element located in the guide cavity and provided with a conduction position and a cut-off position. When the spherical valve element is located at the conduction position, fluid can circulate between the valve seat through hole and the circulation structure, when the spherical valve element is located at the cut-off position, the spherical valve element blocks an opening of the valve seat through hole, the spherical valve element can move in the axial direction of the valve seat through hole under the action of the pressure difference between the two sides of the spherical valve element, and in the using process of the one-way valve, the fluid can flow through the circulation structure. The value of a gap between the spherical valve element and the guide cavity is A, and A is not smaller than 10% of the diameter of the spherical valve element. According to the utility model, the probability that the valve core is stuck due to the size deviation of the guide sleeve after expansion caused by heat and contraction caused by cold can be reduced.

The invention discloses a snowmobile gear shifting structure, and belongs to the field of snowmobiles, the snowmobile gear shifting structure comprises a box body, a gear shifting support and a gear shifting assembly are mounted on the box body, a gear shifting limiting opening is formed in the gear shifting support, the gear shifting limiting opening comprises a gear shifting channel, a parking opening is connected to the gear shifting channel, and the parking opening intersects with the gear shifting channel; a gear entering opening and a gear reversing opening are formed in the two sides of the parking opening correspondingly, the gear entering opening and the gear reversing opening both intersect and communicate with the gear shifting channel, and due to the fact that the gear shifting assembly needs to move in the gear shifting channel during gear shifting, the gear shifting assembly does not stay in the gear shifting channel before and after gear shifting and is located in the gear entering opening or the gear reversing opening or the parking opening; therefore, mistaken gear shifting caused by mistaken touch is avoided, and the problem that in the prior art, mistaken touch or gear shifting failure is prone to occurring when the snowmobile shifts gears by shifting the gear shifting rod front and back is solved.

The application discloses a wet oxidation catalyst, which comprises the following raw materials in percentage by weight: 0.1-2% noble metal, 1-10% graphene-based material, and the rest is a carrier, wherein the carrier is modified titanium dioxide, specifically, a rare earth-transition metal-oxygen vacancy-mesoporous three-dimensional gradient titanium dioxide carrier. The application aims at solving the technical problem of poor stability of the catalyst.

The utility model discloses a river-crossing pipeline structure which comprises a foundation, two buttresses are poured on the foundation, the two buttresses are arranged on two banks of a river channel, and a pipeline main body structure is fixedly connected between the two buttresses. According to the river-crossing pipeline structure, the rigidity and the stability of the river-crossing pipeline are improved, the application range of the river-crossing pipeline is expanded, the overall sectional area of the structure is increased by utilizing the strength of the river-crossing steel pipe and adding the reinforced profile steel at the bottom, the structural stress in the middle of a large bending moment is reduced, and therefore when the span is large, the rigidity and the stability of the river-crossing pipeline are improved. Structures such as pipe bridges and trusses can be prevented from being used, the steel pipe can still be used for directly crossing the river channel, the application range of the river-crossing pipe bridge is widened, and remarkable economic benefits are achieved.

The utility model provides a kind of rhythmic vibration machine, it is related to fitness equipment technical field, including base, lower support, upper support and pedal, lower support is fixed with base, upper support is fixed with pedal, and lower support is equipped with rhythmic module, including drive motor, pivot and the cam connected with pivot by eccentric bearing, drive motor drives pivot by transmission mechanism, drives cam to make upper support rhythmic up and down;Meanwhile, vibration module is equipped on the side of upper support away from drive motor, for generating high-frequency vibration. By efficiently integrating rhythmic and vibration function in one, compact structure, and the stability of both simultaneous operation is improved by effectively avoiding motion interference with the layout of the two, so that users can simultaneously obtain the dual effect of full-body rhythmic exercise and local muscle deep relaxation.

The invention discloses a trench isolation structure, a preparation method thereof and a semiconductor device, and the preparation method comprises the steps: providing a semiconductor substrate which comprises a trench; at least the interior of the groove is filled with a sacrificial layer, and the filled sacrificial layer exposes a part of height of the side wall of the groove in the depth direction from the port of the groove to the interior of the groove. A first oxidation film layer is at least formed on the side wall of the groove and above the sacrificial layer in the groove, a first part of the first oxidation film layer is formed on the side wall of the groove, and a gap is formed in the first part; the second portion is formed at the bottom of the gap and on the sacrificial layer. Forming a window on the second part, wherein the window exposes part of the sacrificial layer; and removing the sacrificial layer in the groove based on the window. And filling the gap in the first part with a second oxide film layer until the gap is completely filled with the second oxide film layer. Therefore, the preparation process of the trench isolation structure can be simplified, the preparation difficulty and cost can be reduced, and the performance of the semiconductor device can be improved.

The invention relates to the technical field of artificially synthesized mordenite, and provides high-crystallinity high-silicon mordenite as well as a preparation method and application thereof. Si / Al in the high-crystallinity high-silicon mordenite is greater than 15, and the relative crystallinity is greater than 75%. Aiming at the technical difficulty that the mordenite is difficult to form a high-silicon framework, after the second silicon source, the structure-directing agent and the solvent are added, the secondary crystallization is performed, so that the framework composition control of the mordenite is realized, and the precise construction of the high-crystallinity high-silicon mordenite is realized; the technical bottleneck that high-silicon mordenite is difficult to directly synthesize by single one-time gel-forming crystallization and the problems of low crystallization activity, poor uniformity and the like under the condition that the alkalinity is too high or too low are solved, the upper limit of a Si / Al specific phase region of artificial in-situ synthesis of mordenite is broken through, crystal parameters are effectively controlled, and the product yield is improved; therefore, the microporous crystallinity of the zeolite is enhanced, the metastable state surface active acid center distribution of the zeolite is greatly optimized, and the zeolite has good aromatic hydrocarbon conversion performance.

The invention relates to the technical field of relays, and particularly discloses a high-load movable contact spring and a push rod type relay comprising the movable contact spring. Wherein the movable contact spring is provided with a contact spring body, and the contact spring body is of an overlapped structure of at least two contact springs in the thickness direction; in the overlapping structure, the springback side reed and the pushing side reed which are adjacently arranged are provided with an elastic gap which is located between the pin connecting position and the pushing connecting position and is of a triangular structure. The pushing side reed forms a bottom edge of the elastic gap; the springback side reeds form two waist edges of the elastic gap; the length of the bottom edge is larger than that of the two waist edges. According to the invention, the formed push rod type relay can realize high current-carrying performance by basically keeping the original electromagnetic attraction design, the formed push rod type relay can form dimension reduction competition in the market, and the market prospect is good.

The application relates to the technical field of communication equipment installation, and provides a device fixing support and communication equipment, wherein the device fixing support comprises a main fastener, an adapter and a fastener, the main fastener is suitable for being connected with a fixed object, one side of the main fastener is formed with a protruding part along a first direction; the adapter is suitable for being connected with a communication device, one side of the adapter is formed with a recessed part matched with the protruding part; one of the side surfaces of the protruding part and the side surface of the recessed part is provided with a groove, and the other is provided with a boss matched with the groove; the groove is provided with a first penetrating hole, and the boss is provided with a second penetrating hole; and the fastener is penetrated in the first penetrating hole and the second penetrating hole to fix the main fastener and the adapter. The protruding part of the main fastener is tightly matched with the recessed part of the adapter, the connection rigidity is enhanced, the structural stress of the connection position is reduced, the boss and the groove provided on the side matching surface of the main fastener and the adapter are limited and matched, the fastener is matched with the main fastener and the adapter, and the installation is convenient.

The utility model discloses a semiconductor packaging structure, which comprises a horizontally arranged diode chip, an upper electrode electrically connected with the upper surface of the diode chip, a lower electrode electrically connected with the lower surface of the diode chip, and an epoxy packaging body coated on the outer side of the diode chip, the end, connected with the diode chip, of the upper electrode is provided with an upper connecting part horizontally arranged above the diode chip, an upper thinning area is formed below the upper connecting part, and the end, connected with the diode chip, of the lower electrode is provided with a lower connecting part horizontally arranged below the diode chip. A lower thinning area is formed above the lower connecting portion, and the diode chips located in the upper thinning area and the lower thinning area are respectively connected with the upper connecting portion of the upper electrode and the lower connecting portion of the lower electrode in a welding mode through a welding layer. According to the utility model, the packaging volume of the epoxy packaging body can be reduced, the heat dissipation efficiency and the heat dissipation uniformity are improved, and the stability of the performance in the use process can be improved.

The invention relates to the cross technical field of sodium-ion batteries and glass preparation, in particular to a sodium-ion battery negative electrode material and a preparation method thereof, and the sodium-ion battery negative electrode material comprises a current collector and a composite active coating attached to the current collector; the composite active coating is formed by coating and drying slurry, and the slurry comprises a glass material, a conductive material and a binder. According to the invention, the glass material is introduced into the composite active coating, so that the structural stress in the sodion deintercalation process is effectively buffered, and the phase change and structural collapse of the electrode material are inhibited, thereby remarkably improving the cycling stability; meanwhile, the ion diffusion rate and the electron conduction efficiency are enhanced and the rate capability and the capacity performance are improved by a three-dimensional conductive network formed by the glass material, the conductive material and the binder in a synergistic manner, the overall preparation process is simple, the cost is relatively low, and a feasible material solution is provided for high-performance application of the sodium-ion battery in the field of large-scale energy storage.

The invention relates to a method for controlling the integrity of a single crystal of a quadruple guide blade, and belongs to the technical field of precision casting of aviation turbine blades. The casting method of the quadruple single crystal guide blade comprises the processes of ceramic mold core preparation, wax mold module pressing and combination, shell mold preparation, directional solidification, depoling, stress relief annealing, vacuum heat treatment, single crystal integrity detection and the like. The wax mold module comprises a pouring system wax mold, a blade wax mold, a transition section and a spiral crystal selector; the blade wax mold is provided with a blind riser which is arranged on the large margin plate and is flush with the end face of the exhaust edge of the blade body extension section on the outer side of the large margin plate; one end of the blade wax mold is connected with the plate-shaped ingate, the other end is connected with the transition section, and the transition section is connected with the bottom plate through the spiral crystal selector. According to the method for controlling the integrity of the casting blade single crystals, the metallurgical defects of mixed crystals, recrystallization and the like of the quadruple integral casting single crystal turbine guide blade can be effectively reduced, the problem of the integrity of the blade single crystals is solved, and the qualified rate of the quadruple single crystal guide blade is increased.

The present application belongs to the technical field of planetary gear transmission mechanism parts, and particularly relates to a planetary gear carrier, which comprises a front planetary carrier body and a rear planetary carrier body arranged in two parts, and a connecting column is arranged on the front planetary carrier body, the coaxial bidirectional transmission structure effectively increases the meshing length and the bearing area, the load is uniformly distributed, and the transmission stiffness and stability are significantly improved; the radial inner and outer double-side island-shaped reinforcing structure is adopted on the two sides of the groove in the circumferential direction, the stress concentration area is precisely reinforced, and the connection strength and the fatigue resistance of the brazing position are greatly improved; the through dynamic balance hole group realizes overall double-face dynamic balance, overcomes the technical prejudice in the industry that low speed does not need dynamic balance, and obviously reduces the vibration, noise and gear impact; the flow guide structure and the labyrinth type fitting structure improve the flow and filling effect of the brazing filler metal, and improve the uniformity and reliability of the weld; the heat dissipation gap improves the heat dissipation capacity, reduces the structural stress under high temperature working conditions, and prolongs the overall service life.

This invention provides a hydrothermal-synthesized, long-term, anti-degradation, low-density cementing material for ultra-high temperature environments and its preparation method. This cementing material incorporates calcium oxide, silicon oxide, and various calcium aluminates into its formulation. The hydration reaction of these raw materials at high temperatures generates a substance with a certain strength. Simultaneously, under high-temperature conditions, the three types of calcium aluminates in a specific ratio can react with calcium oxide and silicon oxide to form hydrated calcium aluminosilicate (C-A-S-H), which exhibits long-term high-temperature resistance, thus ensuring the long-term high-temperature performance of the cementing material. Through this method, a cementing material that does not experience strength degradation under long-term high-temperature conditions (90 days of curing at 240℃) is obtained, effectively solving the problem of strength degradation at high temperatures in existing cement slurries used in deep wells.

The invention discloses a high-nickel ternary positive electrode material and a preparation method and application thereof, and belongs to the technical field of batteries and battery materials, a coating layer is formed on the surface of the high-nickel ternary positive electrode material through silicon dioxide, direct contact between an electrode material and an electrolyte is effectively isolated, and then through a thiol-ene click reaction, the high-nickel ternary positive electrode material is obtained. The graphene / titanium dioxide core-shell whisker is used as a reinforcing phase to coat the surface of the silicon dioxide coating layer again, so that the interface bonding force between the two coating layers is increased, the volume change caused by lithium ion intercalation and deintercalation can be coped, the structural stability of the material is kept, and the specific discharge capacity, the capacity retention rate and the cycling stability are favorably improved; according to the graphene / titanium dioxide core-shell whisker, titanium dioxide containing whiskers is synthesized on the surface of graphene containing a lamellar structure through microwave heating and serves as a core layer, then a shell-structure lanthanum metal framework is synthesized in a hydro-thermal mode, and the interface bonding force can be further improved through the mechanical interlocking effect.

This utility model relates to the field of monitoring equipment, specifically disclosing an online monitoring and maintenance device. It includes a mounting base, a protective cover, a support plate, snap-fit ​​blocks, and a monitoring body. The monitoring body is rotatably mounted on the lower end of the mounting base via a rotating shaft and bearing, allowing for pitch rotation. The protective cover covers the monitoring body and is detachably connected to the mounting base via a snap-fit ​​structure. The protective cover has snap-fit ​​parts with snap-fit ​​grooves on both sides. Support plates are symmetrically arranged on both sides of the lower end of the mounting base. The snap-fit ​​blocks are slidably mounted on the mounting base's slide rails and snap-fit ​​into the snap-fit ​​grooves. The support plate has a snap-fit ​​mechanism for driving the snap-fit ​​blocks, and the mounting base has a linkage mechanism for driving the snap-fit ​​blocks. The snap-fit ​​mechanism includes a push plate, a sliding rod, and a pre-compressed elastic element. The linkage mechanism includes a rotating disk, a connecting rod, and a push rod, which can synchronously drive two snap-fit ​​blocks. This device is easy to assemble and disassemble, reliably connected, precisely adjustable, and offers excellent protection, making it suitable for complex environments.

The utility model discloses a vibration arch breaking device for a port hopper. The vibrating device comprises a vibrating plate tightly attached to the inner wall of a hopper and a vibrating pump fixed to the outer wall of the hopper, the upper portion of the vibrating plate is limited through an arranged limiting groove, a through hole is formed in the middle of the vibrating plate, and the vibrating pump penetrates through the through hole, is connected with the vibrating plate and is fixed to the hopper. The device has the advantages that the vibration plate is driven by the vibration pump to generate mechanical vibration or impact force, vibration energy is effectively transmitted to a blocked area in cooperation with the damping cap arranged at the hopper opening, an arch structure formed by static friction between materials is overcome, and rapid arch breaking is achieved.

The present application provides a phased array antenna grating lobe suppression device and a method of using the same, and relates to the field of antenna technology. The phased array antenna grating lobe suppression device provided in the present application includes a grating lobe suppression body, which includes a grid mesh for covering the gaps between antenna units of the antenna array surface to which the antenna array surface is installed; a conductor line, which is arranged in the grid mesh, and the width of the conductor line is greater than the gaps between the antenna units; and a plurality of avoidance holes, which are arranged through the surface of the grid mesh and correspond to the positions of the radiation units. The present application uses a grid mesh and a plurality of avoidance holes to match the gaps in the periodically arranged antenna array surface to which the antenna unit is installed and the positions of the antenna units, respectively. The conductor line and the grid mesh block the gaps between the antenna units, thereby suppressing parasitic radiation and reducing the influence of the gaps between the antenna units on the radiation performance of the original radiation units.

According to the modified high-nickel sodium-ion battery ternary positive electrode material disclosed by the invention, the surface of the positive electrode material is provided with an inner coating layer and an outer coating layer, and the multi-layer coating structure not only effectively isolates direct contact between the positive electrode material and an electrolyte, but also inhibits side reaction in the electrolyte and dissolution of the material; the effect of protecting the electrode material can also be achieved, and the structural stress and surface cracks caused by volume change of the electrode material in the charging and discharging process are reduced, so that the structural integrity and stability of the material are maintained. The dual protection measure not only prolongs the cycle life of the electrode material, so that the electrode material keeps a relatively high capacity retention ratio in multiple charging and discharging cycles, but also improves the rate capability of the electrode, so that the battery can still keep good electrochemical performance during charging and discharging at high rate.