36results about How to "Delay premature failure" patented technology

The invention relates to a high temperature-resistant anti-oxidation filter material and a manufacturing method thereof, belonging to the technical field of high-temperature filter materials. 1%-10% of 2,5-di-tert-butylhydroquinone or rosemary antioxidant liquid is utilized for performing impregnation or coating treatment on a 300-1000g/square meter filter felt produced by the needle puncture method or the spunlacing method for coating an anti-oxidation coating layer with 0.5-50 microns on the surface of the filter felt, and then high-temperature baking treatment and thermosetting with steam or hot oil are performed for 1-60 minutes at the temperature of 100-235 DEG C for forming the high temperature-resistant anti-oxidation filter material for filtering high-temperature smoke dust. In order to solve the defects of the filter material for a bag dust collector in the anti-oxidation aspect, the invention provides the high temperature-resistant anti-oxidation filter material and the manufacturing method thereof, by using the high-temperature antioxidant to perform the impregnation or the coating on the filter material and further performing the baking and the thermosetting treatment,the filter material has the anti-oxidation property, and the too early aging failure of the filter material under a high-temperature oxidation environment can be avoided.

Embodiments of the invention generally provide methods for forming amorphous silicon-based photovoltaic devices, such as solar cells, by utilizing deposition and plasma treatment steps during a plasma-enhanced chemical vapor deposition (PE-CVD) process. In one embodiments, the method includes exposing a transparent conductive oxide (TCO) layer disposed on a substrate to hydrogen plasma during pretreatment, forming a p-type α-Si film on the TCO layer, forming an α-Si intrinsic film on the p-type α-Si film during a PE-CVD process, and forming an n-type α-Si film on the α-Si intrinsic film. In some examples, the PE-CVD process includes depositing an α-Si intrinsic layer during a deposition step, treating the α-Si intrinsic layer to form a treated α-Si intrinsic layer during a plasma treatment step, and sequentially repeating the deposition step and the plasma treatment step until obtaining a desired thickness of the α-Si intrinsic film containing a plurality of treated α-Si intrinsic layers.

A controller for a vacuum contactor or the like measures barometric pressure and provides a short impedance characterizing pulse to the coils of the vacuum contactor coils to assess proper operating conditions of the coils and to check for coil or sensor faults.

A pneumatic animal stunner employing a stunning rod includes a catch mounted within the housing for alternately holding and releasing the stunning rod. A catch piston is disposed adjacent the catch on a side away from the longitudinal axis, and is in sliding contact adjacent the catch end portion and out of contact with the catch body portion. The catch piston slides between a first position urging the catch end portion toward the stunning rod longitudinal axis in the hold position, thereby holding and preventing the stunning rod from being driven forward, and a second position permitting the catch end portion to move to the release position away from the stunning rod longitudinal axis releasing and permitting the stunning rod to be driven forward. Valves control air flow to cause the catch piston to move between the first and second positions.

The invention relates to a multiscale ceramic reinforced aluminum matrix composite with a dense arrangement body and a preparation method of the multiscale ceramic reinforced aluminum matrix composite. The problems that a traditional homogeneous aluminum matrix composite is poor in bullet-proof performance, and the ceramic volume fraction in a bulletproof aluminum matrix composite is low are solved. The composite is composed of the ceramic dense arrangement body, materials containing aluminum and ceramic powder filler. The preparation method comprises the steps that the dense arrangement bodyis densely arranged in a die; 2, column gaps are filled with ceramic powder; 3, a prefab body is prepared trough cold pressing preheating; 4, aluminum is molten; and 5, the molten aluminum is pressedinto the prefab body, the pressure is maintained, and the material is removed from the die to obtain the composite material. The composite has the ceramic content reaching 65-93vol.%, and has excellent bullet-proof performance. The multiscale ceramic reinforced aluminum matrix composite is used in the field of armor protection.

The invention relates to a multi-scale multi-shape ceramic phase reinforced aluminum-based anti-ballistic structure composite material and a preparation method thereof. The multi-scale multi-shape ceramic phase reinforced aluminum-based anti-ballistic structure composite material and the preparation method solve the problem that a traditional aluminum-based composite material is low in ceramic volume fraction, poor in anti-ballistic performance and difficult to achieve projectile body deflecting. The material is composed of densely-arranging ball bodies, densely-arranging columns, an aluminum-containing material and ceramic powder filler. According to the method, firstly, the columns are densely arranged in a mold; secondly, the ball bodies are densely arranged on the columns; thirdly, gaps of the columns and the ball bodies are filled with filler powder; fourthly, cold pressing preheating is carried out to prepare a prefabricated body; fifthly, aluminum liquid is molten; and sixthly,the molten aluminum liquid is pressed into the prefabricated body, and pressure maintaining and demoulding are carried out to form the multi-scale multi-shape ceramic phase reinforced aluminum-based anti-ballistic structure composite material. The ceramic content is 70vol.% to 95vol.%, and the excellent elastic properties are achieved. The multi-scale multi-shape ceramic phase reinforced aluminum-based anti-ballistic structure composite material and the preparation method are used in the field of armor materials.

The invention belongs to the field of electric power systems and particularly relates to a method for designing the corrosion allowance of a metal grounding material in the electric power system, andthe problem that the previous designer determines the key parameter of the material only by checking a meter or estimating is solved when the corrosion allowance of a grounding grid is designed. The method comprises two main corrosion types of the metal material in the electric power grounding environment, namely electrochemical corrosion of soil on the metal material and electrocorrosion of powerfrequency earth current on the grounding material in the electric environment, and the method comprises a design formula for the corrosion allowance of the metal grounding material for the two corrosion types. The related method for designing the corrosion allowance is simple and feasible, and does not need massive calculation. In addition, the power current corrosion on the material, caused by the power frequency earth current, in the grinding grid is taken into consideration in the design link, the consideration does not exist in the previous grounding design, and the design method can be widely applied to power generation, power transmission and transformation and weak current control in the power industry as well as other fields requiring grounding.

A pneumatic stunner for stunning an animal has a piston slideable within an inner chamber, and a stunning rod driven by the piston forward and rearward towards and away from the front end of the housing. The stunning rod has an elongated body having a longitudinal axis, with the forward end of the body having a two-radius configuration that is sized for striking an animal's head, and is adaptable for attaching a hardened tip. A valve system alternately controls flow of the pressurized fluid from a fire pressure chamber to the rearward end of the inner chamber to move the piston and drive the stunning rod forward to stun an animal, and from a return pressure chamber to the forward end of the inner chamber to move the piston and drive the stunning rod rearward and retract the stunning rod. The handle includes a cushioned mount adjustable in direction.

A method of creating a flat-round tube-to-header joint in a CuproBraze heat exchanger wherein the flat-round tube-to-header joint is disposed between a tube and a header having a generally circular opening having a first predetermined diameter formed on a first side thereof for receiving one end of a tube, and provides at least one generally circular end having a second predetermined diameter on the tube to fit into the generally circular opening of in the header. The method further provides a predetermined temper on at least one generally circular end which is at least sufficient to enable cold working of at least one generally circular end to prevent premature failures of the flat-round tube-to-header joint. The flat-round tube-to-header joint is formed by inserting one end of the tube into the first side of the header and forming the flat-round tube-to-header joint between one end of the tube and the header.

The invention discloses a deforming energy-absorbing anchor ring and an anchor rod supporting method for preventing an anchor rod from being broken and catapulted, and is particularly suitable for soft rock large-deformation roadways or sections needing energy-absorbing yielding supporting. The anchor rod penetrates through the anchor ring with opposite holes, pressure is applied to rock mass through a tray and a nut, and deformation is prevented. When the stress of the anchor rod is increased, the anchor ring deforms in the direction opposite to the holes, and thus the energy-absorbing effectis achieved. The deformation amplitude of the anchor ring can be observed by utilizing fluorescent bands oppositely arranged on the outer side of the anchor ring, so that the stress of the anchor rodis pre-judged, and a warning effect on sudden breakage of a potential part is achieved. When the deformation of the anchor ring is too large or the fluorescence range is too large, anti-ejection ironwires penetrate through two penetrating holes which are formed in the tail portion of the anchor rod in a crossed mode and screwed and fixed on an iron wire net. If the anchor rod is broken at any key position, the two anti-ejection iron wires which are arranged in the crossed mode can prevent the anchor rod from being catapulted into the space of the roadway, and people are prevented from beinginjured. The deforming energy-absorbing anchor ring is simple in structure, convenient to operate, low in economic cost, safe, reliable and good in effect.

The invention discloses a quenching and tempering heat treatment process for different-alloy high-chromium cast iron blow bars. The method comprises the following steps of: (1) heating the different-alloy high-chromium cast iron blow bar to 950-1050 DEG C in a high-temperature electric furnace, insulating preserving the heat for 3-5 hours, and then carrying out quick air cooling and normalizing; (2) tempering the normalized blow bar for 3-5 hours in a high-temperature tempering furnace at the temperature of 350-500 DEG C, wherein the tempering treatment atmosphere is air, and the alloy high-chromium cast iron components in the alloy high-chromium cast iron blow bar comprises the alloy high-chromium cast irons of Cr15, Cr20, Cr26 and the like. During quenching and tempering heat treatment,the invention improves the roughness of the blow bar under the condition of not affecting the hardness as much as possible, thereby reducing the damage, blocking falling and advanced failure of the blow bar in use.

The invention discloses a ceramic powder reinforced multilayer metal and intermetallic compound composite structure and a preparation method thereof, and belongs to the technical field of structure and functional composite material preparation. The ceramic powder reinforced multilayer metal and intermetallic compound composite structure is of a multi-layer structure and is formed by alternately stacking metal plates and ceramic metal plates and achieving interface compounding through hot-pressing diffusion, and the relative melting point of metals in the ceramic metal plates is higher than that of metals in the metal plates. Ceramic powder is sprayed on the surfaces of the metal plates at intervals in a long strip shape to obtain ceramic metal plates. The multi-layer structure comprises Ncomposite units, and N is not less than 2. A layer of metal plate is placed between the two composite units, each composite unit is of a three-layer structure, the upper layer and the lower layer arethe ceramic metal plates, and the middle layer is a metal plate. The ceramic powder reinforced multilayer metal and intermetallic compound composite structure has a multi-layer gradient organization structure and a multi-layer performance gradient response mechanism, excellent energy absorption and impact resistance are shown, and the preparation process is suitable for large-size protective armors integrated forming with complex shapes and has good application prospects.

A light emitting diode (“LED”) module with improved thermal characteristics is provided. The module includes an LED, a first circuit board, a second circuit board, a lower insulator, an upper insulator, a lower contact, upper contacts, and a heat sink. Preferably, the heat sink comprises an outer housing and a contact ring. The LED and the heat sink are attached to the first circuit board via solder. In addition to serving as a substrate for the LED, the first circuit board (which contains a plurality of thermally conductive layers connected by vias) facilitates the transfer of heat away from the LED to the heat sink. The module also has improved mechanical and electrical properties, including redundant electrical connections, stable mechanical connections, and a shock-absorbing lower contact. The lower insulator can also be configured to prevent misalignment of the power source with the lower contact when the module is used in a flashlight or other lighting device.

The invention discloses a dowel positioning bracket based on composite materials for cement concrete pavement, which comprises: two sets of dowel brackets arranged in parallel, each group of brackets includes two positioning main rods arranged in parallel, A number of door-shaped support legs are evenly connected between the two positioning main rods in parallel directions. The root of the support legs is provided with a circular hook claw, and the top cross bar of the support leg is centered with a detachable composite ring. The hook claw, the composite circular hook claw includes the lower half hook claw for connecting the support legs and the upper half hook claw for connecting the dowel bar. The invention has the advantages of low density, simple manufacturing process, detachable, convenient transportation, light weight, can be installed and formed on site, reduces construction difficulty, and speeds up construction progress. At the same time, it has good corrosion resistance and high temperature resistance, low heat and humidity shrinkage stress, and the unique structure further strengthens the stability of the dowel bar during use, effectively reducing the problem of misalignment when the dowel bar is installed.

A mining screening panel which has a screening surface having spaced stainless steel profiled wires supported on transversely extending spaced rods or bars in which the cross sectional shape of the profiled wires is a vertical truncated diamond. The top portion is an inverted wedge with a flat top with depending diverging sides and the bottom portion is a wedge with dependent converging sides with a flat or convex bottom. The widest portion of the vertical diamond constitutes the notional screening surface and defines the size of the screening aperture. The raised top above the notional screening surface provides the wire a wear surface above the aperture and this provides the wedge wire and aperture with a longer wear life, thus reducing change out periods and reduction in premature failure of wedge wire, which in turn reduces operating costs.

A pneumatic stunner for stunning an animal has a piston slideable within an inner chamber, and a stunning rod driven by the piston forward and rearward towards and away from the front end of the housing. The stunning rod has an elongated body having a longitudinal axis and a detachable hardened tip. The density of the material comprising the elongated body is less than the density of the material comprising the detachable hardened tip.