7results about How to "Prevent influx" patented technology

This utility model discloses an elevator water-blocking device with a water-blocking function, including a water-blocking gate, a servo motor, a reel, and a lifting steel wire. The servo motor and the reel are located above the sill of the elevator hall door. The lifting steel wire connects the water-blocking gate and the reel. The servo motor controls the rotation of the reel and the lifting steel wire, causing the water-blocking gate to be transported to the sill of the elevator hall door for storage or to the floor of the hall door for water blocking. An elevator system incorporating this water-blocking device is also disclosed. This utility model features a concealed and aesthetically pleasing design, is easy to install, and provides active and efficient water-blocking sealing. It forms a physical watertight barrier, effectively preventing external floodwater from flowing into underground spaces, protecting underground equipment from water damage, and is suitable for various newly built or existing locations.

The utility model discloses a reinforced shield machine cutterhead of tunnelling contour line peripheral stratum, this shield machine cutterhead includes cutterhead, high pressure nozzle, grouting pipe and grouting pump, and the cutterhead includes ring beam, amplitude arm and flange plate, and the amplitude arm is fixed evenly on the flange plate with interval, and the middle part and the end of amplitude arm are connected through ring beam, and the cutter is installed on the cutterhead, and the outer edge surface of the outermost ring beam is provided with mounting hole, and the high pressure nozzle is installed in the mounting hole, and the grouting pump is installed on the shield machine trolley. The utility model improves the structure on the cutterhead, and the mounting hole is arranged on it, and the high pressure nozzle is installed in the mounting hole, and the high pressure cement slurry is injected into the nozzle through the grouting pump through the grouting pipe, and the high pressure cement slurry that sprays cuts and stirs the stratum outside tunnelling contour and mixes with the soil, forms the mixture of cement and soil, and the mixture forms the cement soil with certain intensity after several days, plays the supporting and water -resisting effect when excavating the butt joint section, prevents stratum collapse and muddy water from gushing into the tunnel.

The utility model relates to new energy material preparation technical field especially, a kind of multistage screening mixing equipment of hard carbon negative electrode material, including hopper, hopper size setting is wide down narrow, the bottom end of hopper is provided with the semicircular chute of communication with its inside, install distribution assembly in chute, prevent blocking assembly is installed in the top of hopper, hopper bottom and located chute are fixedly installed with unloading cover, the bottom of unloading cover is fixedly connected with the unloading pipe of L shape, the one end of the transverse straight portion of unloading pipe is sleeved with link component, screening assembly is rotatably connected with the right side of link component, the utility model is prevented by the synergic design of blocking, distribution, multistage screening and accurate shunt, effectively solve the defect of the blocking problem and the insufficient defect of grading accuracy of existing equipment, provide efficient, stable equipment support for the fine processing of hard carbon negative electrode material, it is favorable to promote the uniformity and purity of subsequent electrode preparation raw material.

This application discloses a device and process for detecting the thickness of plastic tarpaulins, belonging to the field of equipment for quality inspection of plastic tarpaulins. The device and process include: a thickness measuring mechanism for measuring the thickness of the plastic tarpaulin; the thickness measuring mechanism includes a mounting housing with a through groove, and laser rangefinders mounted on both the upper and lower sides of the mounting housing; a placement frame; a conveying mechanism with two transmission rollers mounted on a first support frame; a limiting mechanism with two adjusting rollers mounted on a second support frame; a calibration component; a chip removal component; and an air-increasing component. This application's technical solution, by setting up adjusting rollers and two sets of upper and lower laser rangefinders, not only greatly reduces the wear on the plastic tarpaulin during measurement, ensuring the quality of the plastic tarpaulin, but also avoids measurement errors caused by a single-sided laser, effectively improving the accuracy of measuring the thickness of the plastic tarpaulin.

The application provides a conflict processing structure of a newly-built rainwater pipeline and an existing pipeline and a construction method thereof, which comprises an interaction well arranged at the intersection of the newly-built rainwater pipeline and the existing pipeline, an opening is arranged on the side wall of the interaction well, the opening is penetrated by the existing pipeline, and a stress compensation space is formed between the opening and the existing pipeline, a sleeve pipe is sleeved outside the pipeline, and a side wall closing element is arranged outside the interaction well to close the opening. The opening with the stress compensation space is arranged on the side wall of the interaction well, the existing pipeline penetrates the well chamber in a non-contact mode, and the load transmission path between the interaction well structure and the existing pipeline is completely cut off. The decoupling design can effectively absorb and isolate the stress generated by the well chamber settlement, construction disturbance and external ground dynamic load, avoid displacement, deformation or cracking of the existing pipeline caused by stress coupling, and ensure the absolute safety of the existing pipeline.

The application discloses a coal-burning prevention coal hopper structure of a biomass boiler and a use method thereof, and relates to the technical field of boiler feeding, which comprises a feeding pipe, wherein the feeding pipe comprises a vertical section, a horizontal section and an inclined section which are sequentially communicated; two first baffles are arranged on the inner side wall of the top of the inclined section of the feeding pipe; two second baffles are arranged on the inner wall of the bottom of the inclined section of the feeding pipe; and the first baffles and the second baffles are staggered. Two feeding assemblies are arranged on the inner wall of the bottom of the inclined section of the feeding pipe. In the process of moving the transmission block, the movement of the baffle can be realized through the connecting seat, the ball head and the connecting rod, so that the baffle is drawn out of the feeding pipe, the materials in the feeding hopper enter the position below the baffle through the baffle, meanwhile, the other baffle seals the feeding pipe, and thus, the reheating phenomenon in the feeding pipe is avoided, and the materials in the feeding hopper are prevented from being burned.

The present application provides a kind of mine no ventilation working face mining system and method, it is related to coal mining technical field, the mining system includes L type working face;Coal winning machine, be arranged in L type working face, for completing coal wall cutting, roof support and coal transportation;Air door, be arranged in the position of transport drift near with auxiliary transport roadway junction, for closing the entrance of L type working face, to form closed space;Low temperature nitrogen injection system, be arranged in auxiliary transport roadway, its output end passes through air door, for the nitrogen gas that is transported to L type working face after cooling treatment, make the oxygen concentration in L type working face drop to below 5%, temperature is maintained at 20~25 ℃, and keep positive pressure state;Exhaust system, be arranged in return air roadway, its input end passes through air door, for the gas of L type working face is discharged.Compared with the traditional ventilation system, the present application system realizes the near zero carbon emission of coal mining process, can reduce more than 90% of gas emission and more than 95% of dust emission.