44results about How to "Reduce installation stress" patented technology

The invention relates to an attached support structure which consists of a guide seat and an attached support. An outer cylinder of the attached support is movably sheathed on an inner cylinder; a regulating nut is fixedly arranged in the inner cylinder, a regulating screw rod is arranged in the outer cylinder, the regulating screw rod is connected with the regulating nut through a thread, and a driving mechanism for leading the regulating screw rod to rotate is arranged on the regulating screw rod. The guide seat comprises a guide seat body, a lifting pull rod and a one-way pawl mechanism. The one-way pawl mechanism comprises an anti-fall block, a sliding cylinder and a reset tension spring, wherein, the anti-fall block is mounted on the guide seat body through a support pin shaft, a shift fork is arranged on the outer wall of the sliding cylinder, and a sliding pin on the anti-fall block is positioned in a shift fork notch; and one end of the rest tension spring is connected with theguide seat body, the other end is connected on the sliding cylinder by hanging, and the sliding cylinder and the lifting pull rod form the sliding pair connection. On the one hand, the attached support structure realizes the stepless regulation of the connection distance between a frame body and the surface of an outer wall of a building, on the other hand, the attached support structure can realize the full-automatic two-way anti-fall of the frame body by utilizing loads during lifting.

The invention provides a band-pass filter which comprises an input end, an output end and a filter circuit connecting the input end with the output end. The filter circuit comprises a main transmission line and a plurality of sections of short circuit transmission lines with the same impedance; and one end of each section of short circuit transmission line is connected in parallel to the main transmission line, and the other end is grounded. Both the main transmission line and the short circuit transmission lines adopt quarter-wavelength lossless transmission lines; and the phase difference of transmitting signals on the main transmission line and on the short circuit transmission lines is a half of pi. In the band-pass filter provided by the invention, a common electronic element is replaced by the short circuit transmission lines, so that the volume of the band-pass filter is reduced; and the quality factor of the short circuit transmission lines is higher than that of the common electronic element, so that the filter performance is improved.

The invention relates to a suspension bridge steel beam erecting method which comprises the following steps that midspan steel beam sections are symmetrically erected section by section from the midspan to the two sides, and the adjacent midspan steel beam sections are hinged between upper-layer bridge floors; when the curvature of the bridge line shape of the erected mid-span area reaches the curvature designed into the bridge line shape, the erected mid-span sections are rigidly connected to form a whole; and closing of the side-span side steel beams and the middle-span steel beams is completed by adjusting the postures of the steel beams which are located on the two sides and connected into a whole. According to the suspension bridge steel beam erection method designed by the invention, the installation stress in the steel beam erection process is reduced, the installation quality of the bridge is improved, meanwhile, the erection of the side span steel beam section and the middle span steel beam section is independent, and the construction efficiency can be improved by reasonably arranging the steel beam erection procedure and optimizing the construction organization in a steel beam factory and on a construction site.

The invention provides an inlet and outlet gas confluence device of eleven-high-pressure-gas-cylinder trailer, belonging to the technical field of a gas cylinder confluence device. The device comprises a main inlet and outlet gas pipeline, NPT1 / 2'' paired screws, a four-way joint, a high pressure six-way, a converged pipeline, eleven communicating pipelines and safety emptying devices which are fixed by three stages of fixing devices; the upper end of the main inlet and outlet gas pipeline is connected with the output port at the lower end of the high pressure six-way; the output ports at left and right ends of the high pressure six-way 26 are connected with the converged pipeline; the converged pipeline is connected with the communicating pipelines 38 through the four-way joint; and the other ends of the communicating pipelines are connected with end plugs through the NPT1 / 2'' paired screws and the safety empting devices 2. According to the device provided by the invention, the device is optimally designed by adopting the reasonable confluence device and is fixed by the three stages of fixing devices, thus, the gas leakage problems caused by the fact that the assembly is hard, the confluence device is fixed insufficiently, and the connecting pieces are loose due to the low shockproof capability of the structure of the confluence device and concentrated assembly stress are solved; the inlet and outlet gas confluence device integrates the upper, middle and lower three grouped eleven high pressure gas cylinders, and is a high integration of inlet and outlet gas confluence structure; and moreover, the device is reasonable in design, convenient in assembly and disassembly, and is convenient for operation and later period maintenance.

The invention provides a silicon micro electrostatically suspended accelerometer, and relates to an MEMS micro inertia component and an instrument. The silicon micro electrostatically suspended accelerometer comprises a measurement and control system, a metal base and a gauge outfit, wherein the measurement and control system comprises four layers of circuits vertically stacked, the four layers of the circuits sequentially comprise a digital control board, an analog-digital and digital-analog interface board, a main detection board and a front detection board, the gauge outfit is welded to the front detection board, the metal base is provided with an installation hole and an installation boss, the digital control board, the analog-digital and digital-analog interface board and the main detection board are sequentially connected and fixed to the installation hole of the metal base, and the front detection board is fixed to the installation boss of the metal base. The silicon micro electrostatically suspended accelerometer is high in resolution ratio, stability of installation errors is good, and the silicon micro electrostatically suspended accelerometer has a local temperature control function and is compact in structure.