48results about How to "Improve vibration quality" patented technology

The invention discloses an intelligent vibrating method for a high-strength concrete member. Through a PLC system, the number and location distribution of vibrating rods of end tenons are set up and the rising, falling, starting and stopping of vibrating parts of side tenons are reasonably controlled to achieve precise positioning vibration of the end tenons and the side tenons while vibrating theconcrete member. The PLC control system can detect the vibration power of each vibrating rod at different vibrating positions in real time. If one vibrating rod works improperly, the vibrating rod isstopped, the position of the vibrating rod and the time of vibration are recorded, and after a frame is horizontally moved forward to a next vibrating position, the PLC system drives a cart to move to the upper portion of a non-vibrating position and activates a vibrating-compensation rod rightly above the portion for vibration compensation. The entire equipment is only needed to automatically move from one end of the concrete member to the other end along the direction of moving during the initial setting time, so that all parts of the concrete member are uniformly and densely vibrated, andsince each part is vibrated before initial setting, the overall vibrating quality is greatly improved.

The invention relates to a construction method of spraying prefabricated T beams, comprising the steps of: 1) preparation of pedestal; 2) binding and installation of steel bars; 3) making of formwork; 4) installation of formwork; 5) pouring concrete; 6) vibrating concrete; 7) Formwork removal; 8) Concrete maintenance; 9) Wastewater recycling. The beneficial effects of the present invention are: the present invention arranges horizontal jacks on both sides of the T-beam pedestal as push-out demoulding devices, and the end molds are connected and fixed with the pedestal through anchor bolts, which can improve the integrity and stability of the T-beam formwork; The top platform and electric hoist are set above the T-beam formwork, which can not only temporarily fix and position the steel cage, but also drive the vibrating rod to vibrate the concrete at different parts, improving the quality of concrete vibrating; The sprinkler bracket is equipped with a swinging sprinkler head on the top, sprinkler bracket side frames are installed on both sides, and a hidden sprinkler head is installed inside the T-beam pedestal, which can spray the T-beam in an all-round way for health preservation.

Disclosed is an open-type elastic shorter tie vibration damping track structure. An efficient and fluent exhausting and water draining channel is provided for elastic vibration damping parts. The vibration damping property is improved and the service life is prolonged. The technical problem affecting the application and popularization of an elastic shorter tie vibration damping track in the long term is solved. The open-type elastic shorter tie vibration damping track structure comprises a monolithic track bed and the elastic vibration damping parts arranged at intervals in the extending direction of a line. Each elastic vibration damping part is composed of a shorter tie, an elastic covering sleeve and an elastic cushion layer. The outer side wall of each shorter tie is sleeved with the corresponding elastic cover sleeve, the elastic cushion layers are arranged between the bottom faces of the shorter ties and the bottom faces of the elastic covering sleeves, and the elastic vibration damping parts are embedded into an embedded groove formed at the time of casting the monolithic track bed in situ. The cross section of each shorter tie is in a variable cross-section shape in the length direction, and the outer side ends of the embedded groove and the elastic covering sleeves are provided with openings parallel and level to the transverse side face of the monolithic track bed.

The invention relates to a vibrator material used for a vibration motor of a mobile phone and a preparation method thereof; wherein, a tungsten-nickel-copper alloy with the purity of equal to or more than 99.9 wt percent is adopted as the vibrator material with the contents of 95 to 97 wt percent of tungsten, 2-3 wt percent of nickel and 1 to 2 wt percent of copper. The preparation method of the vibrator includes the procedures of material mixing, adhesive mixing in, alloy powder granulating, particle screening of alloy powder, pressure casting and forming, sintering, postprocessing and the like. Compared with the prior art, the invention has the advantages that the vibrator of the vibration motor of the mobile phone is produced by using the tungsten-nickel-copper alloy material with highspecific gravity and is characterized by high gravity, intensity and rigidity, small expansion coefficient and good corrosion and oxidation resistance; nicer vibration quality, running stability and service life can be acquired; simultaneously, the invention can effectively decrease the volume of the vibration motor of the mobile phone and reduce the cost. The preparation method is high in industrial automation degree and production efficiency, simple in technological operation and good in property of prepared finished product.

The invention discloses a large-section tunnel excavation and support construction method for crossing a soil-rock boundary stratum. The method comprises the following steps of first, upper middle step excavation and initial support construction, specifically, carrying out upper step excavation and initial support construction on a construction tunnel by a plurality of excavation sections from rear to front, and when any excavation section is subjected to upper step excavation and initial support construction, the process comprises the following steps of measuring pay-off, drilling and blasting construction, excavation and initial support of an upper cave, and excavation and initial support of a middle cave; second, lower step excavation and initial support construction; and third, carrying out secondary lining construction. The method is reasonable in design, simple and convenient to construct and good in use effect, the upper blasting area in the upper step and the middle blasting area on the middle step are separately subjected to blasting zone division, the arrangement position of each shot hole in each blasting zone is defined, the collapse of a tunnel face or the collapse ofa vault caused by large vibration generated by blasting when one-time loading of the large section is excessive can be effectively prevented, the safety and reliability of the tunnel excavation process are ensured, and the stability of the tunnel structure is ensured.