4results about How to "Good sealing environment" patented technology

The application provides a multifunctional modular combination valve for a space vehicle cold air pressurization system, comprising a valve body and a subassembly installed on the valve body, wherein the subassembly comprises an electric explosion valve, a buffer valve, a pressure reducing valve, a safety valve and a pressure sensor; the valve body is a structure with multiple cavities inside; an air inlet interface and an air outlet interface are arranged side by side on one side of the valve body; the valve body is externally provided with mounting portions corresponding to the subassembly; and each subassembly is threadedly and sealingly connected to the valve body. The application has the advantages of compact structure, small size, simplified pressurization system structure layout, reduced space envelope size, improved assembly process, improved maintainability, satisfaction of the demand for miniaturization, light weight and integration of a new generation of aircraft, reduction in the number of high-pressure pipelines and welds in the pressurization system, reduction in the system weight, improvement in the sealing reliability and anti-mechanical environment performance.

The application provides a packaging method of an LED lamp bead and the LED lamp bead, and belongs to the technical field of LEDs. Specifically, a plurality of LED chips are provided, the first surface of the LED chip is provided with a welding electrode; the second surface of the plurality of LED chips is arranged on a bottom film, the second surface is arranged opposite to the first surface; the adjacent LED chips are provided with a gap; a glue layer is formed in the gap, and the surface of the glue layer is not higher than the first surface of the LED chip. By controlling the surface of the glue layer to be not higher than the first surface of the LED chip, the complete exposure of the first surface and the welding electrode is maximized, an unobstructed welding interface is provided for welding, and the problem that the glue layer around the welding electrode is expanded by heat and stress to affect the welding effect is fundamentally avoided.

This utility model relates to the field of measuring instrument protection technology, and discloses an electromagnetic flowmeter with a protective structure, including a protective top cover. A detachable nut is threaded to the bottom of the protective top cover, and a fixing beam is threaded to the bottom of the detachable nut. The protective cover is threaded to the bottom of the fixing beam, and two transmission pipe ports are fixedly connected to the left side of the protective cover. In this utility model, the operation of the internal electromagnetic flowmeter structure is ensured by the fixing of the protective top cover and the protective cover. The additionally provided fixing beam and inspection door can be disassembled and opened for maintenance, thus achieving a closed and detachable effect for the electromagnetic flowmeter. This provides both protection and convenient operation. With the cooperation of the pipeline reinforcement layer and the sealing flange structure, the bottom flow pipe and transmission pipe are protected against damage, thereby solving the problem of damage to the central detection pipe caused by human or environmental factors in industrial production.

The utility model belongs to the technical field of building component curing equipment, and particularly relates to a movable concrete curing steam generator which comprises a base, and a cavity is formed in the base. A steam assembly is arranged in the cavity; a steam discharge seat is arranged at the top of the cavity; a component container is detachably arranged on the surface of the cavity; a steam inlet is formed in the bottom of the component container; a sliding type mechanical sealing mechanism is arranged in the steam discharge seat relative to the steam inlet; and an opening and closing mechanism is also arranged in the steam discharge seat. The component container is communicated with the steam assembly in the cavity through the steam discharge seat; when steam curing is carried out, due to the existence of the sliding type mechanical sealing mechanism, an excellent sealing environment can be formed between the container and the cavity, and steam leakage can be reduced or even avoided.