63results about How to "Reduce construction hazards" patented technology

The invention discloses a method and a system for monitoring an oil-gas pipeline in a mining subsidence area and a system constructing method. The method comprises the following steps of: monitoring axial strain of a pipe body with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring horizontal deformation of a soil body with a fiber grating sensor; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing horizontal deformation change of a soil body on the top of the pipe in the mining subsidence area, axial strain change of the pipe body and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the axial strain of the pipe body reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a horizontal deformation curve of the soil body changes suddenly, performing pipeline safety joint early-warning.

The invention discloses a method for monitoring an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. The method comprises the following steps of: monitoring pipe body axial strain with a fiber grating strain sensor, monitoring pipe-soil relative replacement with a fiber grating displacement sensor, and monitoring soil body horizontal deformation with a fiber grating sensing network; demodulating and preprocessing signals acquired by the sensors, and transmitting the signals to a remote monitoring center; further analyzing and processing data in the monitoring center, and computing mining subsidence soil body horizontal deformation change, pipe body axial strain change and pipe-soil relative displacement change; judging the state stabilities of the pipe body strain change and the soil body strain change, and judging whether the data surpass threshold values; when three parameter values are smaller than respective threshold values, judging that the pipeline is in a safe state; and when the pipe body axial strain reaches 70 percent of a pipe body limit strain value, or a pipe-soil relative displacement value reaches a threshold value and keeps constant, or a soil body horizontal deformation curve changes suddenly, performing pipeline safety joint early-warning.

The invention discloses a freeze soil area oil and gas pipeline monitoring method and system. The freeze soil area oil and gas pipeline monitoring method includes the steps of conducting monitoring on the temperatures and the moisture around pipelines and the displacement of a tube bodies through temperature sensor sets, moisture sensor sets and fiber bragg grating displacement sensor sets respectively, sending signals obtained through monitoring to a photoswitch (13) through optical cables (12), sending the signals to a lower computer (15) after the signals are demodulated by an interrogator (14), enabling the lower computer (15) to call self-programmed programs, control the photoswitch (13) and the interrogator (14), collect data and preprocess the data, transmitting the preprocessed data to a low-orbit satellite (17) through a satellite communication module (16), receiving the data through the low-orbit satellite (17) and forwarding the data to a satellite communication module (18), transmitting the received data to an upper computer (19) through the satellite communication module (18), analyzing and processing the data through the upper computer (19), and judging the safety condition of the pipelines to conduct damage forecasting. The freeze soil area oil and gas pipeline monitoring method and system are high in precision, high in stability and low in cost.

The invention discloses a method and a system for monitoring pipe-soil relative displacement of an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. The method comprises the following steps of: demodulating and preprocessing a wavelength signal acquired by a sensor on a field monitoring station, and remotely transmitting the signal to a remote monitoring center; receiving data by the monitoring center, further analyzing and processing the data with a specific algorithm, and computing pipe-soil relative displacement change in the mining subsidence area; dynamically displaying the pipe-soil relative displacement change in the mining subsidence area to judge the state stabilities of pipe body strain change and soil body strain change, and judging whether the data surpass threshold values; making an alarm when the monitored value of pipe-soil relative displacement surpasses a preset value and keeps constant; when a parameter value is smaller than a threshold value, judging that the pipeline is in a safe state; and when a pipe-soil relative displacement value reaches a threshold value and keeps constant, performing pipeline safety early-warning.

The invention discloses a system for monitoring an oil-gas pipeline in a mining subsidence area and a constructing method thereof. The system comprises a pipe body strain monitoring device, a pipe-soil relative displacement monitoring device and a mining subsidence area horizontal deformation monitoring device; a fiber grating strain sensor a (3) and a pipe-soil relative displacement sensor a (4)are arranged on the monitoring section of an oil-gas pipeline a (2) of a mining subsidence area (1); sensors on every section are connected in series by fusing, and are connected with an optical cable a (7) through a fiber junction box a (6); a fiber grating sensing network a (5) is arranged on the top of the pipeline a (2), and is connected with the optical cable a (7) through the fiber junctionbox a (6); the optical cable a (7) is connected with an optical switch (8); the optical switch (8) is connected with a fiber grating demodulator (9); the demodulator (9) is connected with a lower computer (10); the output of the lower computer (10) is connected with a wireless communication module a (11); and the output of a wireless communication module b (12) is connected with an upper computer(13).

The invention discloses a system for monitoring an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. The system comprises a pipe body strain monitoring device, a pipe-soil relative displacement monitoring device and a mining subsidence area horizontal deformation monitoring device; a fiber grating strain sensor a (3) and a pipe-soil relative displacement sensor a (4) are arranged on the monitoring section of an oil-gas pipeline a (2) of a mining subsidence area (1); sensors on every section are connected in series by fusing, and are connected with an optical cable a (7) through a fiber junction box a (6); the optical cable a (7) is connected with an optical switch (8); the optical switch (8) is connected with a fiber grating demodulator (9); the demodulator (9) is connected with a lower computer (10); data preprocessed with the lower computer (10) are transmitted through a wireless communication module a (11), received by a wireless communication module b (12) and transmitted to an upper computer (13); and a fiber grating sensing network a (5) is used for monitoring soil body horizontal displacement in real time and transmitting data to the upper computer (13).

The invention discloses a system for monitoring pipe-soil relative displacement of an oil-gas pipeline in a mining subsidence area based on a fiber grating sensing technology. A pipe-soil relative displacement sensor a (3) is arranged on the monitoring section of an oil-gas pipeline a (2) of a mining subsidence area (1), and is connected with an optical cable a (5) which is led to a monitoring station through a fiber junction box (4); in the monitoring station, the optical cable a (5) is connected with an optical switch (6); the optical switch (8) is connected with a fiber grating demodulator (7); the demodulator (7) is connected with a lower computer (8); and data preprocessed with the lower computer (8) are transmitted through a wireless communication module a (9), received by a wireless communication module b (10) and transmitted to an upper computer (11). The system has high space resolution and low cost, and is safe and effective.

In the invention, a subgrade settlement numerical model is established based on subgrade design parameters, construction filling record data and FLAC<3D> technology; subgrade settlement real-time monitoring data are acquired by using a single-point settlement meter to realize real-time continuous monitoring of the stability of subgrade settlement, the real-time monitoring data are transmitted to a user computer, the subgrade settlement numerical model carries out comparative analysis on an actually measured subgrade settlement deformation value and a subgrade settlement threshold obtained through numerical analysis and analyzes and evaluates the stability of the subgrade settlement, and results are displayed by using a 3D visualization safety pre-warning platform; all the pre-warning information are sent to the phones of management staff through a short message module connected with the computer in a manner of short messages, and all the monitoring data automatically generate database files in a computer terminal to complete remote intelligent detection and analysis of the subgrade settlement. With the invention, relevant construction personnel on a railway and a highway can take preventive measures in time based on detection data information so as to improve the quality of subgrade construction and reduce hidden construction dangers.

The invention provides a mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, a system thereof, and a system construction method. A wavelength signal acquired by s sensor is subjected to demodulation and pretreatment at an on-site monitoring station, and is sent to a remote monitoring center through remote transmission; the monitoring center receives data, carries out further analysis processing on the data through a specific algorithm, and calculates mining subsidence area pipe soil relative displacement change; through dynamic display of the mining subsidence area pipe soil relative displacement change, state stabilization conditions of pipe body and soil strain change are subjected to determination to determine whether the data exceeds a threshold or not; an alarming condition of pipe soil relative displacement is that a monitoring value exceeds a preset value and maintains constant; when a property value is less than the threshold, it is showsthat a pipeline is in a safe state; when a pipe soil relative displacement value reaches the threshold and maintains constant, an early warning of pipeline security is carried out.

The invention discloses a freeze soil area oil and gas pipeline monitoring method and system and a construction method of the system. The freeze soil area oil and gas pipeline monitoring method includes the steps of conducting monitoring on the temperatures and the moisture around pipelines and the displacement of a tube bodies through temperature sensor sets, moisture sensor sets and fiber bragg grating displacement sensor sets respectively, sending signals obtained through monitoring to a photoswitch (13) through optical cables (12), sending the signals to a lower computer (15) after the signals are demodulated by an interrogator (14), enabling the lower computer (15) to call self-programmed programs, control the photoswitch (13) and the interrogator (14), collect data and preprocess the data, transmitting the preprocessed data to a low-orbit satellite (17) through a satellite communication module (16), receiving the data through the low-orbit satellite (17) and forwarding the data to a satellite communication module (18), transmitting the received data to an upper computer (19) through the satellite communication module (18), analyzing and processing the data through the upper computer (19), and judging the safety condition of the pipelines to conduct damage forecasting. The freeze soil area oil and gas pipeline monitoring method and system and the construction method of the system are high in precision, high in stability and low in cost.

The invention relates to special waterproof and leak-stopping daub for a deformation joint and an expansion joint. The special waterproof and leak-stopping daub is prepared from butyl rubber, styrene-butadiene rubber, methyl vinyl silicone rubber, octamethylcyclotetrasiloxane, a polyamide thermoplastic elastomer and a tetrafluoroethylene-perfluorovinyl ether copolymer. The special waterproof and leak-stopping daub has high autologous cohesive force, has proprieties of being capable of resisting aging and resisting a humid basal surface, and the like, can be used for forming lasting and stablewater stopping layers in the expansion joint and the deformation joint, and is used for realizing a lasting leak-stopping effect, and problems of secondary leakage and the like cannot occur.

The invention discloses a freeze soil area oil and gas pipeline monitoring method. The freeze soil area oil and gas pipeline monitoring method includes the steps of conducting monitoring on the temperatures and the moisture around pipelines and the displacement of a tube bodies through temperature sensor sets, moisture sensor sets and fiber bragg grating displacement sensor sets respectively, sending signals obtained through monitoring to a photoswitch (13) through optical cables (12), sending the signals to a lower computer (15) after the signals are demodulated by an interrogator (14), enabling the lower computer (15) to call self-programmed programs, control the photoswitch (13) and the interrogator (14), collect data and preprocess the data, transmitting the preprocessed data to a low-orbit satellite (17) through a satellite communication module (16), receiving the data through the low-orbit satellite (17) and forwarding the data to a satellite communication module (18), transmitting the received data to an upper computer (19) through the satellite communication module (18), analyzing and processing the data through the upper computer (19), and judging the safety condition of the pipelines to conduct damage forecasting. The freeze soil area oil and gas pipeline monitoring method is high in precision, high in stability and low in cost.

The invention provides a temperature sorting device of an intermediate-frequency heating furnace and a control method of the temperature sorting device of the intermediate-frequency heating furnace. The temperature sorting device of the intermediate-frequency heating furnace can automatically isolate and store blanks, excessively high or excessively low in temperature, output from a discharging opening of the intermediate-frequency heating furnace in the heating process and enables blanks meeting a heating temperature requirement to enter a forging furnace to be forged; and meanwhile, because the raw materials entering the forging furnace are in a temperature controlled environment, the use demand of a die is met, and the service life of the die is prolonged. The bottoms of an over-temperature discharging channel and a low-temperature discharging channel are both provided with storage boxes or conveyer belts, the storage boxes or the conveyer belts are matched with the over-temperature discharging channel and the low-temperature discharging channel, so that the blanks output by the over-temperature discharging channel and the low-temperature discharging channel can be automatically conveyed to corresponding positions, and it is not needed that the relevant blanks not meeting the temperature requirement are manually taken out at the over-temperature discharging channel and the low-temperature discharging channel; and in this way, efficiency is improved, and construction hidden danger is lowered.

The invention discloses a freeze soil area oil and gas pipeline monitoring system based on the fiber bragg grating sensing technology. Temperature sensor sets are arranged on the surfaces of oil and gas pipelines (2) in a freeze soil area and around the oil and gas pipelines (2) in the freeze soil area, moisture sensor sets are arranged around the oil and gas pipelines (2), fiber bragg grating displacement sensor sets are arranged on one side of the oil and gas pipelines (2), all sensors are connected in series in a welding mode and are led into a monitoring station through optical cables (12), the optical cables (12) are connected with a photoswitch (13), the photoswitch (13) is connected with a fiber bragg grating interrogator (14), the fiber bragg grating interrogator (14) is connected with a lower computer (15), data preprocessed by the lower computer (15) are transmitted to a low-orbit satellite (17) through a satellite communication module (16), data are forwarded by the low-orbit satellite (17) to a satellite communication module (18), and received data are transmitted by the satellite communication module (18) to an upper computer (19) and analyzed and processed by the upper computer (19). The freeze soil area oil and gas pipeline monitoring system is high in precision, high in stability and low in cost.

The invention provides a stepping type conveying device and method for a carrier roller of a dip angle belt conveyor, and belongs to the technical field of belt conveyors of an iron-making system. Thestepping type conveying device comprises a carrier roller carrying device, three-carrier-roller assemblies, a conveyor support, traction ropes and winches. The multiple three-carrier-roller assemblies are arranged in the length direction of the conveyor support at intervals, the carrier roller carrying device is placed on the three-carrier-roller assemblies and connected with the winches throughthe traction ropes, the carrier roller carrying device is pulled by the winches to move on the three-carrier-roller assemblies, and the carrier roller carrying device is arranged to be of a double-groove type and can carry 3N carrier rollers which are matched with the number of carrier rollers of the three-carrier-roller assemblies. When the stepping type conveying device is adopted to convey thecarrier rollers, the support of the belt conveyor is utilized to transport carrier rollers needing to be installed in the next step on the installed three-carrier-roller assemblies, new three-carrier-roller assemblies are formed and continue to be applied to the conveying of the next step, no additional design of transport corridors is required, and the situation that other space is occupied, causing the obstruction to the installation of the carrier rollers by builders cannot happen.