10results about How to "Reduce closure" patented technology

The invention relates to a composite negative electrode material and a preparation method thereof and a battery, the composite negative electrode material comprises a carbon material and a silicon-based material, the carbon material is provided with holes, the aperture of at least part of the holes is gradually reduced from the surface of the carbon material to the inside, and at least part of the silicon-based material is filled in the holes. And the opening porosity of holes in the composite negative electrode material is 2-20%. According to the composite negative electrode material disclosed by the invention, the silicon-based material is filled in the holes of the carbon material, so that the structural stability of the material can be improved, the collapse of the material structure caused by volume expansion in the lithium intercalation and deintercalation process is reduced, and the occurrence of side reactions is effectively reduced, thereby improving the cycle performance of the material.

The invention belongs to the technical field of traffic meteorology, and provides a highway agglomerate fog detection method, which comprises the following steps: step 1, detecting layout including a first electrode, a second electrode, an environment conductivity sensor and a background server; 2, electrode signal time and conductivity information of the first electrode and the second electrode and conductivity information of the environment conductivity sensor are collected, and data are uploaded to a background server; step 3, acquiring a continuous change conductivity data curve through conductivity information acquired by the first electrode, the second electrode and the environment conductivity sensor; 4, judging and extracting agglomerate fog inducement conductivity change data through the conductivity change duration, and performing agglomerate fog prediction; and 5, uploading the agglomerate fog prediction information to the fog disaster risk zoning model, and starting agglomerate fog early warning. Accuracy and timeliness of agglomerate fog prediction are improved, timely and effective information is provided for related departments and drivers, and traffic accidents are reduced.

The invention provides a lightweight monitoring and rapid evaluation analysis method and system for small and medium span highway bridges. Comprising a bridge parameterization rapid input module, a vehicle load batch input module, a measuring point information arrangement module, a finite element calculation and analysis module, a batch load working condition measuring point result automatic extraction module and a cloud highway bridge structure response monitoring module. The method has the following advantages: 1, on-site appearance quality acquisition, material performance test, dynamic characteristic test and other work of the bridge are not needed, the safe traffic coefficient of the bridge can be evaluated in real time only by monitoring the dynamic deflection of the measuring point at the key section position based on the standardized structural characteristics of the small and medium span bridge, and the real-time performance of the evaluation result is realized; and 2, under any traffic flow condition, real-time dynamic verification coefficients of various types of overweight vehicles under different driving conditions and bridges can be accurately calculated, and timely safety early warning is realized, so that expenditures of a large amount of manpower, material resources and the like required by a load test are saved, and the cost is greatly reduced.

The utility model relates to the technical field of gas detectors, in particular to a portable explosion-proof all-in-one gas detector which comprises a detector body, a display screen is fixedly arranged on the front side of the detector body, a portable rod is arranged at the upper end of the detector body, an audible and visual alarm is arranged on one side of the detector body, and a detection mechanism is arranged on the other side of the detector body. A plurality of air inlet pipes are fixedly arranged at the lower end of the detection mechanism, an abutting plate is arranged below the air inlet pipes, filtering rings are arranged between the air inlet pipes and the abutting plate, annular limiting grooves are formed in the upper ends of the filtering rings, the annular limiting grooves are matched with the lower ends of the air inlet pipes, and filtering nets are fixedly arranged in the filtering rings. According to the utility model, insect corpses can be conveniently prevented from remaining in the air inlet pipe, the insect corpses blocked on the filter screen can be conveniently cleaned, the time and labor are saved, the efficiency is high, the air inlet pipe can be conveniently sealed when the air inlet pipe is not used, dust entering is reduced, and the detection effect is ensured.

The invention relates to the technical field of X-ray tubes, in particular to a transmission-type X-ray tube which comprises a vacuum tube and a cleaning mechanism. The cleaning mechanism comprises a driving assembly and a cleaning assembly, the cleaning assembly is arranged in the vacuum tube and attached to the inner wall of the vacuum tube, the driving assembly is arranged on the vacuum tube and connected with the cleaning assembly, and the driving assembly is used for driving the cleaning assembly to move in the vacuum tube. And the cleaning assembly is used for cleaning the inner wall of the vacuum tube. The X-ray tube has the effect of reducing the possibility of damage to the X-ray tube.

The invention discloses a telescopic transverse folding airfoil and an unfolding and locking mechanism, and relates to the technical field of aerospace. The airfoil specifically comprises an airfoil body, the airfoil body comprises a first airfoil and a second airfoil, the first airfoil is rotationally matched with the second airfoil through a torsion bar assembly, when the airfoil body is unfolded, the side face of the second airfoil is flush with the side face of the first airfoil, and when the airfoil body is folded, the second airfoil is perpendicular to the first airfoil; the telescopic end of the unfolding locking mechanism is connected with the bottom of the first wing surface; the baffle assembly is arranged on the outer side of the telescopic end of the unfolding locking mechanism in a sleeving mode and makes contact with the bottom of the first wing face. The first airfoil and the second airfoil are transverse folding airfoils, the airfoil body is folded in the circumferential direction of the aircraft, the space outside the aircraft is reasonably utilized, and the appearance envelope of the airfoil body is further reduced when the aircraft is loaded.

The present invention discloses a high-sealing bidirectional gate valve, which relates to the field of valve technology. Due to the fluctuation of liquid, the valve is subjected to different pressures. In the process of pressure fluctuation, the valve cannot change with the fluctuating pressure, resulting in leakage of liquid in the valve. Therefore, the top block is matched with the arc surface of the opposite surface of the slide plate. When it is necessary to completely close the internal flow path of the valve body, the slide plate is contacted with the liquid in the pipelines on both sides. When the pressure in the pipeline increases, the pressure is used to push the sliding plate to slide, so that the connecting arm drives the top block to expand outward, so that the pressure ring squeezes the rubber ring outward, and the rubber ring is pressed at the edge gap of the seal to fit the pressure, which is adjusted with the fluctuation of water pressure. After the water pressure suddenly increases, the sealing fitting pressure of the seal cannot be adjusted with the water pressure, resulting in leakage of the gate valve.

The application belongs to the field of civil construction equipment, and particularly relates to a stable post-grouting device suitable for a vibrated cast-in-place pile, which comprises a pile body and a pile tip, the pile tip is provided with a grouting cavity, the lateral wall of the pile tip is provided with a grouting hole connected to the grouting cavity, the upper side of the grouting hole of the pile tip is provided with a ring capsule, and the ring capsule is connected with a grouting pipeline; wherein the ring capsule can be extended and retracted on the surface side of the pile tip, and the ring capsule can be expanded out of the surface side of the pile tip after grouting, the ring capsule can form a grouting stopping structure before one-time grouting, the closure of the grouting hole is reduced, and the problems in the prior art are effectively solved.

The utility model relates to the technical field of smoke exhausting devices, in particular to a flexible laboratory smoke exhausting device which comprises a main pipeline, the main pipeline is communicated with a pipeline system of a bag type dust collector, a plurality of mounting boxes are fixedly mounted on the main pipeline, movable pipes are coiled in an S-shaped reciprocating mode in the mounting boxes, the first ends of the movable pipes are fixedly connected to the main pipeline, and hand control valves are mounted at the second ends of the movable pipes. And return pulleys are slidably mounted in the mounting box, each bent part of the movable pipe is provided with one return pulley, a plurality of return springs are mounted in the mounting box, the first ends of the return springs are fixedly connected to the mounting box, and the second ends of the return springs are correspondingly and fixedly connected to the return pulleys. By arranging the gas pipeline capable of extending and automatically retracting, the gas pipeline can be used in a large range through pulling when being used, and retracts when not being used, so that the influence on other experimental operations is reduced.

The utility model discloses a swimming pool exposed type waterproof structure which comprises an anti-corrosion concrete layer, a putty layer, a closed base surface layer, a polyurea resin waterproof layer and a polyurea colored drawing finish paint layer which are formed on a swimming pool base layer in a composite mode from bottom to top, a groove is formed in a swimming pool pipeline, and an outlet of the swimming pool pipeline is lower than a groove opening. And a polyurea resin waterproof layer and a silicone sealant are sequentially arranged at the groove. Compared with a traditional waterproof material, the exposed waterproof structure of the swimming pool has the advantages that a continuous seamless waterproof film is formed by polyurea, the overall waterproof performance and stability are enhanced, a polyurea product is an environment-friendly material, contains a low amount of volatile organic compounds (VOC) or does not contain the VOCs, the environment-friendly requirement is met, and the application prospect is wide. Polyurea finish paint is adopted for colored drawing and is not fused with the polyurea waterproof layer, so that the waterproof function is realized.