11results about How to "Reduce sinking" patented technology

The utility model relates to an automatic dust cleaning structure of cement rotary kiln burner, including cement rotary kiln burner structure, is provided with air cannon automatic dust cleaning pipe fitting structure at the top of cement rotary kiln burner structure, air cannon automatic dust cleaning pipe fitting structure includes the dust cleaning main pipe set between the cylinder structure and anchor fastener at the top of cement rotary kiln burner structure, the dust cleaning spray head body structure of uniform distribution setting on the dust cleaning main pipe upper portion and the air cannon gas transmission pipeline connected in the dust cleaning main pipe rear end and the air cannon gas transmission pipeline connection air cannon generating device. This structure can clean the top dust in time in operation, reduces the dust of burner center line subsidence under the adverse environment of burner, improves the clinker section burning quality and reduces the damage of burner protection layer caused by artificial cleaning, guarantees the normal operation of burner, ensures the stable production of kiln section burning system, improves the production economic benefits.

The invention relates to an interbody fusion cage and a preparation method thereof, and relates to the field of orthopedic implantation, the interbody fusion cage comprises a vertically placed cylindrical fusion cage main body and a pore structure fixedly connected in an inner hole of the fusion cage main body, and the pore structure is in a lattice net shape. The interbody fusion cage provided by the invention has a bone induction function, so that a good bone fusion effect can be achieved without bone grafting or with a small amount of bone grafting.

This invention relates to the field of coal mining subsidence control, specifically a method for controlling subsidence through chemical modification and expansion of the floor strata. The method includes: determining the extent of the floor failure zone below the coal seam; selecting a certain thickness of strata below the failure zone as an isolation and protection zone; establishing a chemically modified expansion zone below the isolation and protection zone; selecting an expansion chemical agent based on the mineral composition of the strata in the chemically modified expansion zone; constructing directional boreholes in the working face roadway, with the horizontal section of the directional boreholes constructed within the chemically modified expansion zone, and the directional boreholes being constructed in the direction of the cut-out in the working face advancement direction; fracturing the chemically modified expansion zone through the directional boreholes; and injecting the chemical agent into the chemically modified expansion zone through directional grouting boreholes after the working face has passed the horizontal section of the directional boreholes but before reaching the borehole opening. This invention chemically modifies the floor strata to induce expansion, thereby lifting the floor strata to support the goaf, thus reducing the subsidence of the overlying strata and controlling surface subsidence.

The utility model discloses a kind of guiding formula arc intervertebral fusion cage sets, it includes: shaft sleeve, intervertebral fusion cage and guide needle, the shaft sleeve includes: first blocking part and second blocking part, the intervertebral fusion cage is housed in the shaft sleeve, the intervertebral fusion cage is configured to rotate radially from the shaft sleeve, the guide needle is configured to pass through the intervertebral fusion cage to guide the intervertebral fusion cage to target position, when carrying out spinal interbody fusion cage fusion, intervertebral fusion cage can be guided to the vertebral body opening of target, is implanted with the rotation to comply with the arc of vertebral body, to avoid injury surrounding nerve root or soft tissue, and reduce the opening area required for operation, reach the requirement of wound range minimization.

The utility model discloses an adsorption tower gas distribution device, include: main gas path, gas distribution branch and mineral sieve pipe, one end of main gas path is located adsorption tower outside and is connected with gas source, and the other end is connected with at least two gas distribution branches, and every gas distribution branch is connected with mineral sieve pipe, mineral sieve pipe is buried in adsorbent bed layer, and has gas outlet structure. Reduce the risk of molecular sieve impact, improve adsorption efficiency.

The present application belongs to the technical field of artificial floating island, and particularly relates to an artificial floating island for common tern nesting; the artificial floating island for common tern nesting comprises a foam board, a bamboo pole is fixedly connected to the bottom of the foam board, and a circular groove is formed in the bamboo pole and located at the corner of the foam board; the artificial floating island for common tern nesting further comprises a buoyancy control unit; the present application is characterized in that a plurality of buoyancy control units are uniformly arranged around the foam board, each buoyancy control unit is provided with a No. 1 air bag, the buoyancy of the foam board is changed by changing whether the No. 1 air bag is inflated or not, so as to change the draft of the floating island and adjust the inclination of the floating island, and the risk of sinking and tilting of the floating island is reduced.

The utility model relates to experimental equipment technical field especially relates to a high and low temperature experiment box, its including experiment box body and translation door subassembly, the front side of experiment box body is provided with experiment bin mouth, translation door subassembly includes door body and fixedly connected on the guiding element of experiment box body, through translation door subassembly to experiment bin mouth of experiment box body is opened and shut, relative to the hinge door that opens outward, can effectively reduce the occupation of surrounding space when experiment box opens, avoid the interference with surrounding equipment in the laboratory limited environment etc. space, improved space utilization efficiency, the guiding element of translation door subassembly supports and guides the door body, reduces the subsidence phenomenon due to gravity in the process of frequent on-off of door body, the sealing element connected on the door body is tightly in contact with the front side of experiment box body when the door body blocks experiment bin mouth, forms good sealing effect, improves the sealing performance of experiment box body.

The utility model relates to the technical field of pesticide preparations, and discloses a pesticide preparation stirring and emulsifying reaction kettle which comprises a reaction kettle body, a motor is fixedly installed on the upper surface of the reaction kettle body, a rotating shaft is fixedly installed at the output end of the motor, a stirring mechanism is arranged in the reaction kettle body, and the rotating shaft is fixedly installed at the output end of the motor. A promoting mechanism is arranged in the reaction kettle, the fixing sleeve is fixedly mounted on the cambered surface of the rotating shaft, and a toothed plate is fixedly mounted on the cambered surface of the fixing sleeve. According to the pesticide preparation stirring and emulsifying reaction kettle, a motor drives a rotating shaft to rotate, then a toothed plate rotates, teeth on the toothed plate crush raw materials at the bottom end and cooperate with teeth on a toothed ring cylinder to further promote the crushing effect of the toothed plate, then the toothed ring cylinder extrudes the raw materials under the action of a torsional spring in the process of crushing the raw materials in cooperation with the toothed plate, and the raw materials are crushed more thoroughly. The toothed ring cylinder can rotate on the straight rod, so that the possibility that the toothed plate is blocked is reduced, and the phenomenon that the interior of the reaction kettle sinks to the bottom is reduced.

The utility model discloses an environment-friendly composite plastic drainage plate, which relates to the technical field of plastic drainage plates and comprises a drainage plate and a support component, the drainage plate consists of a base plate and a conical boss, and when the conical boss is distributed upwards, the support component is used for providing auxiliary support for filter geotextile laid at the top of the conical boss. By arranging the supporting assemblies, when the conical bosses are distributed upwards, the connecting transverse strips can provide auxiliary supporting for the filter geotechnical cloth, the sinking phenomenon of the filter geotechnical cloth can be effectively reduced, and when the filter geotechnical cloth sinks, a latticed structure formed by the connecting strips shaped like the Chinese character'shan 'and the supporting transverse strips can provide supporting for the sinking filter geotechnical cloth, so that the filter geotechnical cloth is prevented from falling off. And the sinking filter geotextile is prevented from being in contact with the base plate, so that a space is still formed between the sinking filter geotextile and the base plate, and the drainage channel is kept in an unblocked state.

The application discloses a mask plate and a use method and a mask plate assembly thereof. The mask plate comprises a body part, a plurality of preset areas are arranged at intervals in the body part, and an evaporation opening is arranged in each preset area. The mask plate further comprises a first weight-reducing part, a first supporting part and a second weight-reducing part in the preset area. The first weight-reducing part is arranged around at least part of the edge of the evaporation opening and is in contact with the edge of the evaporation opening. The first supporting part is arranged around the evaporation opening and is located on the side of the first weight-reducing part away from the evaporation opening. The second weight-reducing part is located on the side of the first supporting part away from the evaporation opening and is annular and arranged around the first supporting part. The thicknesses of the first weight-reducing part and the second weight-reducing part are smaller than that of the first supporting part. The mask plate provided by the application can reduce the gap between the mask plate and a precision mask plate, improve the wrinkle between the mask plate and the precision mask plate, and help improve the evaporation quality.

The present application relates to the technical field of coal mine drilling equipment, and particularly relates to a slag discharging device and method for long-distance directional drilling. The slag discharging device comprises: a shell provided with a channel, the channel extending along the length direction of the shell and penetrating through both ends of the shell; a water spraying structure arranged on the side wall of the shell, used for forming a local rotational flow or turbulent flow to improve the wrapping capacity of the water flow on the rock slag; and a pressure boosting part arranged in the channel, used for adjusting the water pressure of the water spraying structure. In the present application, the slag discharging device can adjust the degree of strayness of the water flow in the deep hole by optimizing the water spraying structure, form a rotational flow disturbance field at the bottom of the hole, and flush the rock slag settled at the bottom to reduce the rock slag settled at the bottom, thereby solving the problem of slag discharging in long-distance directional drilling construction.