35results about How to "Easy to form holes" patented technology

The invention relates to a preparation technique for heavy hollow ingots of all levels between 50 tons to 300 tons, in particular to a manufacturing method for heavy hollow ingots with a movable core and low segregation. The manufacturing method is applicable to the preparation process of all heavy hollow ingots cast by adopting movable cores, including the casting of the hollow ingots of various shapes, specifications and materials; besides utilizing simulation means of computers to reasonably design a mould and a casting system for ingots, the manufacturing method mainly adopts a pore-forming technology with a movable core, an intensive cooling technology for various media at different stages, a movable core protection technology, a technology for controlling the flow of a cooling medium and the temperature of the movable core, an atomizing device for the cooling medium, an early electro slag protection and argon protection technology for molten metal and a technology for protecting the chassis from big temperature variation, thereby guaranteeing the purity of the molten metal and the operability and the stability of the casting technique, mitigating the segregation, controlling the segregation position, locating the segregation band of the hollow ingots in the middle position and increasing the utilization rate and the application range of the hollow ingots.

The invention discloses a constraining steel pipe lap joint structure for a vertical prefabricated component. The constraining steel pipe lap joint structure is mainly used for connection of longitudinal rebars of a prefabricated concrete shear wall or a column and other vertical components. The constraining steel pipe lap joint structure is as follows in specific: a constraining steel pipe is arranged at the bottom of an upper-layer prefabricated component; longitudinal ribs in the upper-layer prefabricated component are exposed to the interior of the constraining steel pipe; a lower-layer connecting rebar is inserted in the constraining steel pipe to be in lap joint with the longitudinal ribs in the upper-layer prefabricated component; then, filling material is poured in the constrainingsteel pipe through a preformed vertical through long hole in the upper-layer prefabricated component, or the filling material is filled in the constraining steel pipe through a preformed pulping holeand a slurry discharging hole in the bottom of the upper-layer prefabricated component, and lap joint of the component rebar can be realized when the strength of the filling material reaches the requirement to further meet the force transferring requirement. The constraining steel pipe lap joint structure is reasonable in stress, convenient in production and installation, easy to control in construction quality, and excellent in anti-seismic property and can solve the problems that the traditional connecting structure is difficult in installation and construction and is difficult to ensure the lap joint force transferring performance.

The invention discloses a prefabricated wallboard with holes formed through steel mesh formworks. The prefabricated wallboard is internally provided with vertical through-long holes, the holes are formed through the dismantling-free steel mesh formworks which are formed by welding longitudinal bars or angle steel, steel mesh and transverse keel during production of the wallboard, wherein the longitudinal bars or the angle steel in the steel mesh formworks serve as vertical stress reinforcing steel bars of a wall. No reinforcing steel bars stretch out of the prefabricated wallboard in the vertical direction, additional connecting reinforcing steel bars are arranged in the holes at the joint of the upper and lower layer wallboard, and concrete is poured into the holes to realize the lap joint connection of the vertical stress steel bars of the wall; and reinforcing steel bars stretch out of the prefabricated wallboard in the horizontal direction, and the same-layer adjacent wallboards are connected through a post-pouring section. The prefabricated wallboard is convenient to produce and construct, reasonable in connection structure, and capable of solving the problems that a traditional prefabricated wallboard is difficult to produce and construct, the lap joint transmission performance is difficult to guarantee, and the like.

The invention discloses a connecting member of a prefabricated sandwiched heat-insulating wall, the heat-insulating wall and a construction method thereof. The connecting member comprises a connectingplate and anchoring ribs, the connecting plate is made of a FRP material which is made of reinforced fiber and resin, thickness of the connecting plate is less than or equal to 8mm while width of thesame is greater than 40mm, holes penetrating the anchoring ribs are formed in positions, close to the edge, on two sides of the connecting plate, and the anchoring ribs are correspondingly arranged in the holes penetratingly. The technical problem that conventional connection members of the prefabricated sandwiched heat-insulating wall are big in processing difficulty and poor in anchoring performance when being applied in the heat-insulating wall.

The invention discloses a construction method of a reinforced concrete protection pile in loess areas, comprising the following steps of: (1) opening holes below the ground by means of a Luoyang shovel having a semicircular end part and a diameter of 150-170 mm; (2) when the external threads of the end part of the Luoyang shovel are in contact with the ground, connecting an extension rod with one end provided with a threaded hole and the other end provided with screw threads to the end part of the Luoyang shovel in a threaded connection manner, and continuing digging; (3) when the external threaded of the end part of the extension rod are in contact with the earth layer, connecting other extension rod and continuing digging until the hole is opened to the depth of the protection pile; (4) inserting a reinforcing steel bar having a diameter of 15-17 mm in the hole, and pouring C15 plain concrete into the hole and compacting the concrete; and (5) cutting off the reinforced concrete to expose the head, thereby completing the construction of the concrete protective pile. The construction method is applied to the range of electrified existing lines in the loess areas; the construction method effectively overcomes the disadvantageous effects of a large-sized construction machine on an existing line contact network and avoids the influence on the running of the existing lines; and the construction method is easy for construction and excellent in effect.

The invention belongs to the technical field of combined type pre-reaming construction, and particularly relates to a combined type pre-reaming construction method suitable for a stratum with the rock hardness smaller than or equal to 30 Mpa. The combined type pre-reaming construction method comprises the following steps that S1, a drilling machine is in place; S2, a guide hole is drilled; S3, combined pre-reaming is carried out; S4, hole washing is performed; and S5, a main pipe is dragged back. Compared with a conventional step-by-step pre-reaming construction method, the method has great universality in the aspect of actual operation, and the purpose of high-speed pre-reaming is achieved; the effect is better, and the cutting capacity is 9 times that of a step-by-step pre-reaming cutting capacity; the number of times of manually applying B-type tongs for fastening is reduced, time is saved, and potential safety hazards in the operation process of personnel are reduced; and the use value and the popularization value are realized.

The invention provides a heat dissipating device for a variable frequency motor. The heat dissipating device comprises an impeller with an edge overturned towards one side, a first mounting hole is formed in the center of the impeller, a plurality of second mounting holes are formed around the first mounting hole, a plurality of blade mounting holes are punched in the bottom of the impeller, and a vent hole is formed between two adjacent blade mounting holes; and heat dissipating blades are fixed in the blade mounting holes. The heat dissipating device provided by the invention has the advantages that the blade mounting holes are formed conveniently, and when the blades are mounted, the blades are mounted simply.

The invention belongs to the technical field of river regulation, and particularly relates to a vibrating auxiliary device for a small-diameter root pile and a using method of the vibrating auxiliary device. The device comprises a pile casing placed in a preformed hole of the root pile, and the pile casing is in a hollow shape; a cover plate capable of being overturned downwards is arranged at the bottom of the pile casing, and a steel plate clamped by the vibratory pile driver is arranged at the top of the pile casing. The pile casing in the vibration auxiliary device has an extrusion effect on soil on the hole wall, the phenomena of hole collapse, hole shrinkage and the like are avoided, and it is guaranteed that the root pile is smoothly placed into the preformed hole; and the arranged cover plate which moves downwards and unidirectionally is beneficial to preventing soil from entering the vibrating auxiliary device when the vibrating auxiliary device is lowered, meanwhile, sediments at the bottom of a drill hole can be compacted, and hole cleaning measures in the grouting pile forming process are eliminated.

The invention discloses an underground drilling and sealing tool, and relates to the technical field of coal mine gas extraction, the underground drilling and sealing tool comprises a drilling deviceand a grouting sleeve device. The drilling device comprises a guide reamer bit and a plurality of centralizers. Each centralizer comprises a centralizer body, a first drill rod and a second drill rod.One end of the guide reamer bit is in threaded connection with one end of the first drill rod. The grouting sleeve device comprises a first sleeve, a second sleeve, a guide shoe, a first flange plateand a first connecting pipe. The invention further discloses a drainage method adopting the tool. The construction method has the beneficial effects that the construction method is suitable for underground large-diameter drainage drilling hole forming, pipe descending and pipe fixing. By the adoption of the construction method, in the drilling process, the guide reamer bit drills, the centralizerstraightens the drilling track, it is guaranteed that the drilling track meets the pipe descending requirement, the protrusions on the side wall of the centralizer body can grind the unsmooth positions of the hole wall in the drilling process, and hole forming is easy.