50results about How to "Avoid risk of sabotage" patented technology

The invention discloses a method for querying the station approaching information of a bus by a mobile phone. In the method, a data center performs calculation by using real-time data transmitted through a wireless network by vehicle-mounted positioning equipment to obtain distances between each of a plurality of buses closest to the bus stop and the bus stop, the arrival time of each bus and zone information; and when needing to know the information about the stop, a passenger can query the information from the data center in a way of transmitting short messages or surfing the Internet with the mobile phones. Therefore, bus-arrival information can be queried without observation at a specific stop at any place where the mobile phone can be used, which breaks geographical constraints and further expands the application of a bus-arrival information query function.

The invention discloses a method for testing the profile accuracy of a coated surface, comprising the following steps: measuring the coordinate values of the centers of theodolite target balls and thereference holes of a coated surface in a double-theodolite intersection measurement coordinate system; obtaining the spatial coordinate values of the centers of the theodolite target balls in a coated surface reference coordinate system by reference conversion; replacing the double-theodolite target balls with tracker target balls, and measuring the spatial coordinate values of the centers of thetracker target balls in a tracker measurement coordinate system by laser tracking measurement; using a tracker to scan and measure the trajectories and spatial coordinate values of the center pointsof the tracker target balls in the tracker measurement coordinate system by means of spatial scanning measurement; obtaining the coordinate values of the trajectory of the center point of a scanning tracker target ball in the coated surface reference coordinate system by reference conversion; and obtaining the profile accuracy of the measured coated surface according to the normal deviation between the spatial coordinate values of the points on the trajectory of the center point of the scanning tracker target ball in the reference coordinate system and the theoretical model of the coated surface in the reference coordinate system.

A core dismounting and taking method of a complicated sand core comprises the following steps that an upper mold and a lower mold of a core box are manufactured according to a prefabricated model; a plurality of internal threads are formed on the upper mold, sand is fed into the sand box from a sand feeding opening, the sand is compacted while being fed, and after sand feeding is completed, the sand feeding opening is scraped to be flat; the sand core is hardened; the sand core is dismounted; and the sand core is taken. According to the core dismounting and taking method of the complicated sand core, the internal threads are arranged on the upper mold, a plurality of matched threaded rods are adopted, and the upper mold is lifted in the vertical direction through the reactive force of a parting surface of the lower mold on the threaded rods and the engagement force between the threaded rods and the internal threads until demolding is achieved; and in this way, the upper mold is controlled to be lifted in the vertical direction through the threaded rods, the left-right shake risk is avoided, and the risk that the sand core of a complicated-shape structure is damaged is fundamentally eradicated.

The invention belongs to the technical field of well drilling and completing of oil and gas fields, and in particular relates to a radial horizontal well drilling and sand control completing tool andmethod. The tool is characterized by comprising a radial horizontal well drilling auxiliary tubular column, a radial horizontal well drilling tool string and a sand control tool. The radial horizontalwell drilling auxiliary tubular column comprises a depth adjusting tool, a special oil pipe combination, a depth calibrating tool, an orientation measuring auxiliary tool, an axial anchoring tool, anorientation adjusting tool and a drill-in guiding tool connected in series. The radial horizontal well drilling tool string comprises a logging cable, a circular liquid feeding tool, a gravity sealing tool, a peripheral anchoring tool, a power motor, an adapter connector, a flexible drill pipe and a milling and drilling bit tool. A 10-20 m (hard formation) stable drainage channel can be formed between a shaft and an oil layer to replace a conventional perforated hole for deep penetration completion to pass through a near-well pollution zone and penetrate through an invasion zone of an oil well, so that the injection rates of a water injection well, a gas-injection well and a disposing well are improved.

The invention discloses a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant rat-proof and termite-proof medium-voltage power cable, which comprises a cable core and a flame-retardant wrapping tape, the cable core is embedded in the flame-retardant wrapping tape, and the cable core comprises three conductor wire cores, each conductor wire core comprises a conductor which is sequentially coated with a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a metal shielding layer from inside to outside, and a gap between the flame-retardant wrapping tape and the cable core is filled with a filling layer; the conductor shielding layer, the cross-linked polyethylene insulating layer and the insulating shielding layer are formed by co-extruding three layers; the cable adopts a three-layer co-extrusion technology to extrude the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer at one time, so that the adhesive performance among the three layers after cabling is met, and the layering phenomenon does not occur after extrusion; and the conductor shielding layer is not easy to scratch, so that excellent insulation and mechanical properties of the cable are ensured.

The invention discloses an anti-strong-wind automatic rotary type place name sign based on magnetic force. The place name sign comprises a base body, a base body N pole magnet, a base body S pole magnet, bearings, a rotary shaft, a limiting plate, a frame, a frame S pole magnet, a frame N pole magnet, glass, a phosphor bronze sheet, a piezoelectric crystal plate, a fluorescent lamp and a capacitor. The base body is embedded in the ground, the base body N pole magnet is embedded in one end of the base body, the base body S pole magnet is embedded in the other end of the base body, the bearings are arranged on the upper side and the lower side in the hole in the middle of the base body and internally provided with the rotary shaft, the limiting plate is arranged on the rotary shaft, the frame is arranged on the limiting plate, the frame S pole magnet is embedded in one end of the bottom of the outer side of the frame, the frame N pole magnet is embedded in the other end of the bottom of the outer side of the frame, and the glass is arranged on the front side and the rear side of the frame; a wind tunnel is arranged on the top of the frame and internally provided with a vibration power generation device formed by attaching the phosphor bronze sheet and the piezoelectric crystal plate, and the frame is internally provided with the fluorescent lamp and the capacitor; the frame rotates to the side face to face the air flow under the strong wind, the piezoelectric crystal plate vibrates to generate power, and the frame restores the original site after wind force is reduced.

The invention discloses a safety protection type liquid metal oxygen sensor. The structural design, the protection circuit design and the like of a ceramic tube protective cover are utilized, active protection is carried out on the integrity of the weak part-ceramic tube of an oxygen sensor, the fracture condition is monitored in real time, isolation measures are taken in time to deal with safety risks, and safety accidents and the like caused by leakage are avoided from the two aspects of active defense and risk dealing. The ceramic tube protective cover adopts a streamline staggered design so that the impact damage effect of high-speed flowing liquid metal on the ceramic tube is prevented. Under the extreme accident working condition that the ceramic tube is broken, the high-pressure liquid metal enters the ceramic tube part, the protection circuit is switched on, a warning lamp used for leakage accident warning is lightened, meanwhile, an electromagnet starts to work, the protective cover moves under the action of electromagnetic force and isolates the ceramic tube from the external liquid metal, and therefore, the safety risk that high-temperature and high-pressure liquid metal upwells through the broken ceramic tube and is jetted to an external area is prevented.

The invention provides a cable laying method for vertically laying pipelines. The method comprises the following steps: 1. Positioning and construction of laying pipelines; 2, build an operation platform and laying equipment on that upper part of the laying pipeline; 3, laying cables; Step 4: Fixing cables. step 4, fixing a plurality of auxiliary wire rope are fixed on that upper part of a main wire rope, the auxiliary wire rope is used for supporting the main wire rope, and the ends of the auxiliary wire rope are suspend and fixed on both ends of the load-bearing crossbar on the upper part ofthe laying pipe. The utility model has the advantages of relatively safe coal mine power supply, low cost and convenient maintenance. The great innovation of power supply mode is of great significance for popularization. The service life of the cable is prolonged.

The invention discloses a preparation process suitable for a superconducting detector glass window, which is characterized by comprising the following steps of cutting a chip boundary cutting groove Ion one side of the glass window of a glass window wafer, and completely etching silicon or silicon nitride and a cut-off layer in the chip boundary cutting groove I, bonding one side of a glass window of the glass window wafer with the bearing wafer, etching a glass window on one side of the silicon layer of the bonded wafer, and etching a chip boundary cutting groove II at a position corresponding to the chip boundary cutting groove I to expose the cut-off layer, cleaning the residual photoresist by adopting oxygen plasma, separating the glass window wafer and the bearing wafer by using an organic solvent, and separating the glass window-containing chip from the glass window wafer. By adopting the preparation scheme of the superconducting detector glass window suitable for universe microwave background radiation detection provided by the invention, the success rate of preparing the glass window containing the detector pattern can be improved to 100%, and the success rate of separating the chip containing the glass window from the glass window wafer also reaches 100%.

The invention discloses a method for arranging a vibration suppression device of a variable-pitch marine riser, which comprises the steps of: firstly, according to the actual sea conditions and the inherent characteristics of the riser, the vortex-induced vibration fatigue analysis is carried out on the riser, and according to the analysis result, it is determined whether the installation is necessary Suppression device for vortex-induced vibration; in the second step, according to the vortex-induced vibration fatigue damage risk level, vibration amplitude and drag force load of the riser, the riser is divided into high-risk section of fatigue damage, low-risk section, no-risk section and transition Section, and then adopt different preset installation methods to arrange the vibration suppression device, and finally complete the arrangement of the vibration suppression device. The invention divides the axial area of ​​the standpipe into a high-risk section of fatigue damage, a low-risk section, a no-risk section and a transition section, and adopts different spacings to arrange vibration suppression devices in different fatigue damage areas. This arrangement method can ensure the suppression effect of the vibration suppression device on the vortex-induced vibration, and greatly reduce the drag force load on the standpipe.

A core dismounting and taking method of a complicated sand core comprises the following steps that an upper mold and a lower mold of a core box are manufactured according to a prefabricated model; a plurality of internal threads are formed on the upper mold, sand is fed into the sand box from a sand feeding opening, the sand is compacted while being fed, and after sand feeding is completed, the sand feeding opening is scraped to be flat; the sand core is hardened; the sand core is dismounted; and the sand core is taken. According to the core dismounting and taking method of the complicated sand core, the internal threads are arranged on the upper mold, a plurality of matched threaded rods are adopted, and the upper mold is lifted in the vertical direction through the reactive force of a parting surface of the lower mold on the threaded rods and the engagement force between the threaded rods and the internal threads until demolding is achieved; and in this way, the upper mold is controlled to be lifted in the vertical direction through the threaded rods, the left-right shake risk is avoided, and the risk that the sand core of a complicated-shape structure is damaged is fundamentally eradicated.

The invention belongs to the technical field of oil and gas field drilling and completion, and in particular relates to a radial horizontal drilling and sand control completion tool and method, wherein the tool is characterized in that it includes a radial horizontal drilling auxiliary string, a radial horizontal drilling tool string and a sand control tool , radial and horizontal drilling auxiliary strings include depth adjustment tools, special tubing assemblies, depth calibration tools, azimuth determination auxiliary tools, axial anchoring tools, azimuth adjustment tools and drilling steering tools, and radial horizontal drilling tool strings Including interconnected logging cables, circulating liquid inlet tools, gravity sealing tools, circumferential anchoring tools, power motors, variable buckle joints, flexible drill pipes and milling bit tools. The invention can establish a 10-20m (hard formation) stable drainage channel between the wellbore and the oil layer, replace the conventional perforation for deep penetration completion, cross the near-well pollution zone, penetrate the oil well invasion zone, and improve water injection wells, Injection rate of gas injection well and treatment well.