45results about How to "Ensure site safety" patented technology

The invention discloses a roadway surrounding rock stress monitoring device based on fiber bragg grating sensing. Grooves are symmetrically carved in a metal rod along the axial center, an FBG set is fixedly installed inside each groove, FBGs serve as sensitive elements, when roadway surrounding rock is deformed, the stress of the surrounding rock will be changed, therefore, force is generated through the metal rod, surface micro-deformation is generated, the grating distances of the FBGs attached to the metal rod are changed along with the metal rod, the center reflection wavelength of the FBGs can be caused to generate drifting, wavelength signals are demodulated into electrical signals through an FBG interrogator, and the stress situations of different sites can be obtained. The roadway surrounding rock stress monitoring device has the advantages that installation is easily achieved, and the roadway surrounding rock stress monitoring device is suitable for wide popularization; power is not required to be supplied to the working face end, and site safety is guaranteed; all-optical measurement and fiber transmission are adopted, and influences of electromagnetic interference are effectively avoided; the temperature error is compensated, and the accuracy is improved; the surrounding rock stress monitoring results can be timely and accurately provided, and guidance on site production and scientific research is facilitated.

The invention relates to a surrounding rock stress on-line monitoring system and method based on a fiber bragg grating borehole stress meter. A plurality of measurement points are arranged on a surrounding rock, the fiber bragg grating borehole stress meter is installed in a surrounding rock wall drill hole, an optical fiber connector is connected with an optical fiber, and the optical fiber is connected to a mining optical cable, is then directly connected to the ground, and is connected with a fiber bragg grating modulator; an optical signal is modulated to a digital signal by the fiber bragg grating modulator, the digital signal is transmitted to a computer, is monitored in real time and is analyzed and processed, and a surrounding rock axial stress and transverse stress analyzing and processing method is provided under the temperature compensation condition according to grating stress characteristics. The surrounding rock stress on-line monitoring system and method have the advantages that equipment is easy to install, long in service life and suitable for popularization and use; power supply is not needed underground, electrical signals and electronic devices do not exist, and therefore the field is safe; because all-optical measurement and optical fiber transmission are adopted, monitoring precision is greatly improved, and effect of electromagnetic interference can be effectively avoided under complex and poor environment; surrounding rock stress monitoring results can be provided in time and guiding of field production and scientific research work is facilitated.

The invention belongs to mine pressure on-line monitoring systems, and discloses a working face mine pressure on-line monitoring system based on fiber grating sensing. According to the monitoring system, a plurality of measurement points are selected on a working face in a pit, one monitoring system is installed inside each measurement point, a hydraulic control valve of each monitoring system is installed in a hydraulic support and is connected with a pressure guide hole of an intrinsic safety type fiber grating pressure meter through an oil pipe, an optical signal of the intrinsic safety type fiber grating pressure meter is transmitted to a fiber grating demodulator on the ground through an optical fiber and a mining optical cable, the fiber grating demodulator is demodulated into a digital signal to be transmitted to a computer system, and the computer system carries out real-time monitoring and analysis processing. The working face mine pressure on-line monitoring system based on the fiber grating sensing has the advantages of being simple in installation, adopting full-optical measurement and optical fiber transmission, being capable of effectively avoiding influence of electromagnetic interference, greatly improving monitoring accuracy due to adoption of a temperature compensation grating for compensating a temperature error, and being capable of timely providing a working face mine pressure monitoring and predicting result so as to bring convenience to production and scientific researches of a guidance site.

The invention discloses a roadway gas monitoring system based on an optical fiber grating sensing technology, belonging to the roadway gas monitoring system. The monitoring system comprises a grating optical fiber sensor set, an underground alarm protective device, an optical fiber, a mining optical cable, an optical fiber grating demodulator and a computer system, wherein the grating optical fiber sensor set is arranged on a roadway tunneling working surface and a roadway air return port; the grating optical fiber sensor set is connected to the mining optical cable by the optical fiber; the mining optical cable is connected with a ground optical fiber grating demodulator; the ground optical fiber grating demodulator is connected with the computer system; and an output end of the computer system is connected with the underground alarm protective device. The roadway gas monitoring system based on the optical fiber grating sensing technology disclosed by the invention has the advantages as follows: monitored result is more accurate; signal transmission distance is far, capacity of resisting disturbance is strong; the grating optical fiber sensors work inactively and do not need to be supplied with power underground, and do not have an electric signal and an electronic apparatus, so that field security is ensured; a monitored picture is directly displayed in figure, writing, report form, and the like, so that results can be timely monitored, and warning and forecasting of the roadway gas concentration can be realized, and therefore, the roadway gas monitoring system is beneficial to guiding field security production work.

The invention discloses a long-length overhang trusswork high form hanger system comprising an upper truss body and a lower truss body. The lower truss body comprises an upper-supported steel cantilever beam, a lower-supported steel bracket, a pull-up steel wire rope and a lower frame concrete truss. The long-length overhang trusswork high form hanger system has the advantages that construction efficiency is greatly improved, input of revolving materials is reduced, production cost is saved, building time is reduced, and unit time availability of machinery and staff is increased.

The invention provides a P2P (peer-to-peer) network based construction personnel safety monitoring method and system. The method includes: deploying a P2P network, which comprises a monitoring node and a plurality of monitored nodes, on a construction site on basis of mobile terminals carried by construction personnel; allowing the monitoring node to transmit, in sequence, a poll request to the monitored nodes in a monitoring object information table; after receiving the poll request, allowing the monitored nodes to feed position information back to the monitoring node; allowing the monitoring node to judge whether or not the monitored nodes are in the safety construction area according to the position information fed back by the monitored nodes. The monitoring node and the monitored nodes are divided according to roles of the construction personnel. The method and the system according to the embodiment have the advantage that site safety is provided with certain guarantee.

The invention provides an air foam flooding oil-extraction well site device and an air foam flooding oil-extraction well site technology. A first pressure transmitter is arranged between an oil extraction wellhead and an oil tubing outlet, a second pressure transmitter is arranged between an oil extraction wellhead and a casing gas outlet, a third intercepting valve and a first valve are sequentially arranged on a pipeline between the oil tubing outlet and a well site pitching device, a fourth intercepting valve, a check valve and a second valve are sequentially arranged on a pipeline between the casing gas outlet and a casing gas constant-pressure gas release area, and the first pressure transmitter, the third intercepting valve, the first valve, the second pressure transmitter and the second valve are electrically connected to a well site RTU. The air foam flooding oil-extraction well site device and the air foam flooding oil-extraction well site technology have the advantages that through a normal production process, a gas channeling generation process, a safety emptying process and an oxygen content monitoring process, production safety is ensured, safety, high automation degree and environment protection are achieved, the technical problems that air foam flooding personnel is high in operation labor intensity and potential safety hazard are solved, and accordingly the device and the technology are promising in application prospect for test or oil fields employing enhanced oil recovery.

The invention belongs to the field of steel structure construction, and particularly discloses a flying-wing-type formwork space truss structure and a construction method thereof. The flying-wing-type formwork space truss structure comprises main trusses, auxiliary trusses and parallel chord member trusses. The main trusses, the auxiliary trusses and the parallel chord member trusses are welded and fixedly connected to form a formwork space truss structure body. The flying-wing-type formwork space truss structure further comprises flying-wing-type trusses located above the formwork space truss structure body. The flying-wing-type trusses are connected with the auxiliary trusses of the formwork space truss structure body through draglines. The invention further discloses the construction method of the flying-wing-type formwork space truss structure. The construction method includes the construction steps of support installing, main truss installing, hemisphere auxiliary truss installing, steel dragline constructing and the like. By means of the flying-wing-type formwork space truss structure, a whole structure is more stable, a chain block and a wall pulley are matched to carry out steel structure installing and steel dragline tensioning, the construction method is simple, the number of adopted machines is small, the site safety is guaranteed, the construction quality is also guaranteed, and the construction cost is greatly reduced.

The invention discloses a safety control device for the construction site, which comprises an electrification guide base and an electrification sliding head, wherein the bottom inside the electrification guide base is designed with a guide socket, the top of the guide socket is provided with guide socket slots communicated with the guide socket, the top of each guide socket slot is fixedly provided with a supply contact, both the left side and the right side of the electrification guide base are internally provided the same electrification cavities, the electrification cavity comprises a lowercavity arranged in a mode of extending along the vertical direction and an upper cavity arranged in a mode of extending along the transverse direction, the lower cavity and the upper cavity are connected, the bottom of the lower cavity is provided with a sliding cavity hole, an opening of the sliding cavity hole faces towards the guide socket, each sliding cavity hole is connected with the guidesocket, the inner layer of each lower cavity at the outer side of the sliding cavity hole is fixedly provided with a jacking loop spring. The safety control device is simple in structure and convenient to operate, the whole internal part adopts simple transmission, and the cost is low. Meanwhile, the safety of power utilization on the construction site is ensured, and unnecessary waste of resources is saved.

The invention relates to an electromechanical comprehensive support hanger. The electromechanical comprehensive support hanger comprises at least two vertically-arranged stand columns, a connecting disc is arranged at the top ends of the stand columns, a length-adjustable bearing cross beam is arranged between every two adjacent stand columns, the bearing cross beams are horizontally arranged, sliding sleeves which are arranged on the adjacent stand columns in a sleeving mode and are connected with the stand columns in a sliding mode are arranged at the two ends of the bearing cross beam correspondingly, and fixing structures used for fixing the positions where the sliding sleeves are located are arranged between the sliding sleeves and the stand columns. The electromechanical comprehensive support hanger can be adjusted according to different sizes of ring corridors and mounting positions of pipelines in the ring corridors, so that large-scale production of the electromechanical comprehensive support hanger is realized; the invention further discloses an installation method of the electromechanical comprehensive support hanger, industrial production can be carried out, only assembly, positioning and punching of assemblies need to be carried out on an installation site, the site safety of operators is guaranteed, and the working intensity of workers is effectively reduced.

The invention discloses an intelligent reminder high-voltage electrified display device, which comprises a high-voltage electrified sensor installed at a high-voltage pile head and collecting three-phase voltage, and a compensation circuit, an input protection circuit, a current/voltage conversion circuit, and a signal The processing circuit, the signal processing circuit is connected with the programmable control circuit through the wave detection circuit; the infrared sensor for sensing personnel activities is connected with the programmable control circuit; the programmable control circuit is connected with the alarm circuit, and the programmable control circuit is connected with the three-phase charging circuit LED display device connection. The invention collects the three-phase voltage through the high-voltage charging sensor installed at the high-voltage pile head, displays the three-phase charging situation through the LED, and automatically senses whether someone is moving in front of the high-voltage charging display device through the infrared sensor. Voice reminder "high voltage live, please do not approach".

The invention discloses an elephant trunk method-based anti-blocking dredging system and a construction method thereof. The system comprises a probing and dredging device; the probing and dredging device comprises a case, a hoop type ring and a handheld end control device; the case is provided with a detector, and the bottom of the case is provided with an electric vibrating rod; one end, far away from a sleeve opening, of the hoop type ring is connected to the bottom of the case, a mounting hole for an elephant trunk to penetrate through is formed in the inner side of the ring, and a plurality of electric rollers are movably mounted in the mounting hole; and the handheld end control device is electrically connected to the electric vibrating rod, the electric rollers and the detector. The matched probing and dredging device is installed on the elephant trunk and moves along the elephant trunk through manual rope traction operation or complete remote control operation, a specific pipe blocking position is probed through an elephant trunk opening and a camera, and the vibrating rod is remotely operated to rotate to a proper position for vibrating and dredging; and pipe disassembly dredging and high-altitude operation are avoided, safety is guaranteed, meanwhile, construction is convenient, cost is saved, and the construction period is shortened. The dredging system is easy and convenient to operate, high in applicability, facilitates the application and popularization of the elephant trunk, and greatly improves the construction efficiency of deep foundation pits and mass concrete.

The invention relates to an electric power security control recognition device and method. The device comprises an information card, a storage card, a GPS module, a processor, an active RFID module and a GPRS module, wherein the information card is used for storing worker information; the storage card is used for storing forms related to field security control; the GPS module is used for positioning position coordinates of workers in real time; the processor is used for comparing the collected position coordinates of the workers with positioning point coordinates of all working-region poles and towers and calculating the collected position coordinates of the workers and the positioning point coordinates of all the working-region poles and towers to obtain a pole and tower positioning point closest to the workers and judging whether the workers are located in an operation region or not according to the range of the preset operation region; the source RFID module is used for reading electronic tags, and the electronic tags are located around the corresponding pole and tower positioning points and used for storing information about whether field work is allowed or not; the GPRS module is used for uploading results of field operation carried out by the workers in the operation region, violation reports and accident and dangerous case reports to a field monitoring terminal. By means of the electric power security control recognition device and method, electric power circuit engineering construction control is facilitated, and safety of field staff is guaranteed.

The invention relates to a rotation control platform based on satellite positioning. The platform comprises a mapping storage mechanism which is used for storing set soil colors and set soil types corresponding to different satellite positioning data and a targeted pit digging main body, wherein the targeted pit digging main body comprises a left side fixing framework, a right side fixing framework, a splicing plate body, a rotating head part, a rotating control motor, a left side supporting foot stool and a right side supporting foot stool, and the rotating control motor is used for unlocking a rotating control operation on the rotating head part when receiving a first control signal; and controlling the rotating head part to execute a rotating action at a rotating speed matched with the set soil type corresponding to the current satellite positioning data. According to the control platform, on the basis of the matching relationship between the satellite positioning data and the soil type as well as the soil color imaging characteristics, confirmation of the soil and the confirmation of the soil type based on visual detection can be completed, so safety and the reliability of a pit digging machine are improved.

The invention provides a pressure abnormity and interval display structure of a pressure gauge. A first index unit, a second index unit and a third index unit are arranged on a transparent panel of the pressure gauge, and the index units are used for adjusting positions; two of the index units are used for setting the positions of a low pressure scale and a high pressure scale respectively, and the other index unit is driven by the pressure pointer to change the position if an overpressure condition exists after setting, so that field staff can know the overpressure condition conveniently. Practical pressure abnormity and interval display is provided, and actual requirements are met.