30results about How to "Timely conversion" patented technology

The invention relates to the technical field of railway tunnel construction, specifically a digging method of IV and V-class surrounding rock railway tunnel with large cross section, aiming to solve the problems of the existing railway tunnel digging method including narrow operation space, low work efficiency, inflexible construction method, instable construction progress, high deformation potential of surrounding rock, and inconvenient operation. The method comprises performing leading support, digging arc-shaped pilot tunnel and preserving core soil; staggeredly digging left / right side walls of middle sidestep and preserving core soil; staggeredly digging left / right side walls of lower sidestep and preserving core soil; sequentially digging upper, middle and lower sidesteps and preserving core soil; and digging inverted arch and carrying out preliminary support. The invention has large construction space and high work efficiency, and can perform multi-job parallel operation. When the geologic conditions are changed, the invention can be flexibly and timely converted to other construction method. Preservation of core soil and left / right staggeredly digging are helpful to the stability of the digging working face. When the surrounding rock has large deformation, the invention can adjust closure time as soon as possible under the prerequisite of assuring safety and meeting requirements of clearance cross section.

A method for treating industrial waste gas containing nitrogen oxide comprises the steps of: (1) conveying waste gas containing NOx to the bottom of a denitration tower (3), and conveying a permanganate denitration agent to the top of the denitration tower (3), the permanganate denitration agent converting NOx into nitrate, and residual liquid flowing to the bottom of the denitration tower (3); (2) conveying the residual liquid at the bottom of the denitration tower (3) to an electrolytic tank (1), and electrifying the electrolytic tank (1) to electrolyze manganate in residual liquid into permanganate, so as to form the permanganate denitration agent; and (3) conveying the electrolyzed permanganate denitration agent to the top of the denitration tower (3). By means of the method, permanganate can be circularly utilized, so that operation costs are reduced; in addition, the scaling is avoided, the denitration tower (3) is not blocked, and the environmental pollution is avoided. In addition, also disclosed is a device for treating industrial waste gas containing nitrogen oxide.

The invention discloses a high-sensitivity, high-frequency response, and overload-resistant silicon carbide high-temperature vibration sensor, which includes a silicon carbide chip, a silicon carbide bonding sheet, a thermal insulation layer, a packaging shell and a Kovar pin; the silicon carbide chip includes a supporting sheet, a cantilever beam and a mass block; the supporting sheet and the silicon carbide bonding sheet form a bonding body; the mass block and the cantilever beam are arranged in the cavity of the bonding body, and a chip circuit is arranged on the cantilever beam ; The Kovar pins extend into the bonding compound along the through holes arranged on the package shell, the heat insulating layer and the silicon carbide bonding sheet, and are connected with the chip circuit. The invention proposes that the high-temperature vibration sensor has the characteristics of high sensitivity, high-frequency response, and overload resistance, and can realize accurate and timely measurement of vibration signals in a high-temperature environment.

The invention relates to the technical field of LED lamps, and discloses a device for protecting LED downlights by adjusting the light angle force. The equipment for protecting LED downlights by adjusting the angle of illumination drives the main shaft through the core components, and the screw rod outside the lower end of the main shaft runs. The core components mesh with the disc at the left end, so the disc runs accordingly, and the disc shaft There is a round rod fitting at the center, and the round rod fitting is plugged into the disc to be movably connected to a metal turntable. The metal turntable is provided with teeth matching the disc. The teeth on the metal turntable interact with the disc to produce The driving force, through the combined use of the metal turntable and the disc, makes the disc rotate at a constant speed on the inner groove of the metal turntable, so that the lamp body fixedly connected above the metal turntable has the function of automatically adjusting the illumination angle, and then solves the problem of further improvement. The moment the light is turned on at the door of the house, it causes eye discomfort.

The invention relates to a method for processing and excavating a large cave crossing through a tunnel body. The method comprises the steps of processing the cave; grouting in advance; excavating an arc-shaped pilot tunnel on the upper part; excavating the middle steps; excavating the lower steps; excavating the three layers of steps on the middle part. According to the method provided by the invention, the construction space is large; the mechanical construction is convenient; the parallel operation of multiple operation planes can be performed; the work efficiency is higher; the construction process can be flexibly and timely switched and the construction method can be adjusted when the geological conditions are changed; the method can adapt to different spans and various section forms; the primary lining process operation is convenient; on the basis of step-method excavating, the core soil is reserved, left and right staggered excavating is performed and the stability of the excavating plane is benefited; when the deformation of the surrounding rock is large or sudden, the closing time can be adjusted as soon as possible under the conditions of ensuring safety and meeting clearance requirement; the method can be widely applied to the tunnel excavating construction for quickly, safely and effectively passing the geological conditions on the stratum under special geological conditions of the cave, so as to ensure the construction and tunnel safety.