37results about How to "Increase the amount of expansion" patented technology

The invention relates to a three-dimensional stage capable of synchronously displaying multiple pictures, which comprises a support (20), a fixed block (30) fixed at the upper end of the support (20), lifting frames (40) sleeved on the support (20) and a driving device (50) for driving the lifting frames (40) to move up and down through a servo motor, wherein display screens (42) capable of realizing synchronous display are arranged on the outer surfaces of the lifting frames (40); and the display screens (42) are electrically connected with the driving device (50) through a central controller. A structure of combining a plurality of lifting frames is adopted; each layer of lifting frame is controlled to synchronously ascend or descend by arranging a synchronizing mechanism between adjacent lifting frames, the synchronous, steady and quick ascending and descending of each layer of lifting structure are realized, and rigidity and stability of each layer of the lifting frame are ensured during ascending and descending, so that the ascending and descending processes of the whole telescopic stage consisting of the fluctuation-type lifting frames are smooth and reliable.

The invention discloses a damping support base for a rail. The damping support base comprises a base, a rail support base, a damping spring supported between the base and the rail support base and a damper which is arranged in the base for applying damping effect on vibration of the rail support base, wherein the damper comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel, a piston body which is in sliding fit to the inner cylinder barrel and a piston rod which is connected between the piston body and the rail support base, wherein the piston body comprises a barrel-shaped housing which is provided with a lower opening and is made of a permeability magnetic material, a central column which is coaxially and integrally formed in a barrel-shaped outer housing, a magnet exciting coil which is wound on the central column and a bottom cover for sealing the bottom of the barrel-shaped housing; oil flows through the piston rod through a transverse oil pass hole; and the inner wall of the transverse oil pass hole is fixedly provided with a throttling body made of a magnetostrictive material. Damping strength of the damper in the damping support base can be actively regulated according to needs, so that damping needs of the rail are met.

The invention discloses a metal pipe wall thickness detection device, and relates to the technical field of the ultrasonic detection. The device comprises an electromagnetic ultrasonic sensor, a mounting part for mounting the electromagnetic ultrasonic sensor, a buffer module and a driving module which are connected in order. The invention further provides a metal pipe wall thickness detection method, the method comprises the following steps: the driving module drives the buffer module, and then drives the mounting part for mounting the electromagnetic ultrasonic sensor, so that the electromagnetic ultrasonic sensor is propped against a metal pipe and rotates the metal pipe, the electromagnetic ultrasonic sensor is maintained to always close to the metal pipe, and the electromagnetic ultrasonic sensor transmits and receives a detection signal. The detection device disclosed by the invention is long in service life, convenient for operation, convenient and practical, and has the functions of improving the energy conversion efficiency, and satisfying the detection on the metal pipe wall thicknesses in different specifications.

The invention belongs to the technical field of expansion devices and discloses a damping and buffering expansion joint which is mainly and technically characterized by comprising profile steel side beams arranged pairwise, wherein a rubber sealing tape is arranged between the profile steel side beams; the top edge at the inner side of the profile steel side beam is of a concave-convex shape formed by circularly arranging convex teeth and grooves; the rubber sealing tape is fixed together with the profile steel side beam through a bolt; the bolt is arranged at the groove arranged at the inner side of the profile steel side beam; and an elastic pressing bar is arranged on the rubber sealing tape. The damping and buffering expansion joint provided by the invention has the advantages that profile steel machining is simplified, the rubber sealing tape is not needed to be limited inside a profile steel die, and therefore, simple production is realized. The length of each convex tooth is increased, so that the expansion amount of an expansion device is increased, bridge impact caused by jumping is reduced, the service life of the expansion joint and the service life of the bridge are prolonged, noise pollution to the environment is reduced, and the rubber sealing tape is convenient to replace.

The invention discloses a ceiling curtain with a composite spring. The ceiling curtain comprises a spring installing shaft, an inner spring, an outer spring, a roller tube and curtain cloth, wherein the inner spring is arranged on the spring installing shaft in a sleeving way; the outer spring is arranged on the inner spring in a sleeving way; the roller tube is arranged on the outer spring in a sleeving way; the curtain cloth is coiled on the roller tube; the two ends of the roller tube are respectively connected with a rotating connector and a fixed connector; the two ends of the spring installing shaft, the inner spring and the outer spring are respectively connected with the rotating connector and the fixed connector. The inner spring and the outer spring are arranged on the spring installing shaft, so that under the condition that the total elasticity of the inner spring and the outer spring is greater than or equal to that of a large-diameter spring, the higher expansion amount is realized; the adaptation to a longer curtain cloth can be realized; the size of the whole ceiling curtain can be reduced; the installation, the storage, the transportation and the like are convenient. Compared with a conventional ceiling curtain, the ceiling curtain has the advantage that under the conditions of the same curtain cloth width and the same size, the length of the curtain cloth is more than 30 percent longer than that of the conventional curtain cloth.

The invention provides a gas bearing turbine expansion machine, and relates to the field of mechanical equipment. The gas bearing turbine expansion machine comprises a shell and a center shaft arranged in the shell. A left gas bearing and a right gas bearing are arranged on the left side and the right side of the center shaft in the length direction. The left gas bearing is connected with an expansion machine body through a sealing heat insulation sleeve, and the right gas bearing is connected with a draught fan wheel through a sealing heat insulation plate. The outer side of an expansion wheel is provided with a turbine volute fixed to the left side of the shell. The outer side of the draught fan wheel is provided with a draught fan volute fixed to the right side of the shell. The right side of the draught fan volute is fixedly connected with a draught fan wheel guiding sealing cover. Two radial through holes are formed in the sealing heat insulation plate and serve as a normal-temperature sealing gas inlet and an instrument high-temperature waste gas exhaust port correspondingly. A water path channel is arranged in the draught fan wheel guiding sealing cover and used for leading-in of circulation cooling water. Through the design, the draught fan wheel rear temperature can be effectively reduced, the design adapts to higher-rotation-speed expansion machines, the expansion efficiency is improved, the running adaptive range of the expansion machine is enlarged, and higher market competiveness is achieved.

The present disclosure provides a packaging adhesive, a packaging method, a display panel, and a display device. The packaging adhesive includes a frit, an organic solvent, and a material with a thermal expansion coefficient larger than that of the frit. Using the packaging adhesive provided by the present disclosure, the thermal expansion coefficient of the packaging adhesive from which the organic solvent is removed may be enhanced by doping the material with a thermal expansion coefficient larger than that of the frit into existing glass cement, so that in a packaging process using laser radiation, an expansion volume of the packaging adhesive when heated is increased. In this way, a gap between the packaging adhesive and an array substrate is effectively reduced, and a packaging effect is improved.

The invention provides a roll profile with less unevenness of steel pipe internal threads rolled by an Assel unit. From an inlet side to an outlet side of a roll, an inlet cone area, a shoulder area and a rolling area are arranged in sequence. The inlet cone area is composed of a first inlet cone area body and a second inlet area body. The first inlet cone area body is located between the second inlet cone area and an inlet end of the roll. The ratio of the length of the first inlet cone area in the axial direction of the roll to that of the second inlet cone area in the axial direction of theroll is 7 to 10. An inlet taper angle alpha 1 of the first inlet cone area is one degree from an inlet taper angle alpha 2 of the second inlet cone area. The ratio of the length of the rolling area in the axial direction of the roll to that of the second inlet cone area in the axial direction of the roll is 4 to 5. According to the roll profile with less unevenness of the steel pipe internal threads rolled by the Assel unit, the technical problem that because spiral unevenness appears on the internal surface of a steel pipe, user experience is severely influenced.