37results about How to "Adjustable interval" patented technology

The present invention relates to a safety device which reduces shocks and controls the opening / closing of a door of an elevator to prevent hands from being pinched in the elevator when hands of a user are pinched between the elevator door and a doorframe. The device comprises: a fixing frame where a cross-section, installed across the overall length of a stopper protrusion unit of a doorframe between the doorframe of an elevator door and a hall door of the elevator, is formed as an U shape; a rotating frame which is formed as a plate and installed to be able to rotate on one end portion of the fixing frame ; an operating pin which is installed in the fixing frame to support the back surface of the rotating frame, is supported by a spiral spring, is put towards the inside of the fixing frame by means of the rotation of the rotating frame, and protrudes towards the outside of the fixing frame by means of elasticity of the spiral spring; a switch which is installed in the inside of the fixing frame to be operated if the operating pin is put into the inside of the fixing frame by means of the rotation of the rotating frame; and a controller which is connected to the switch and stops the operation of the hall door of the elevator or controls the speed of the opening / closing of the elevator when the switch is operated.

The invention discloses a winding method for a frequency vibration-killing lamp high voltage grid, and particularly relates to a winding method for a killing lamp high voltage grid through a particularly designed spiral winding machine. A screw rod (3) is driven by a motor (2) to rotate through a synchronous belt (8); a nut (4) mounted on and matched with the screw rod (3) moves transversally under the combined action of the screw rod (3) and a guide rod (5); the rotation of the screw rod (3) drives a supporting frame (7) placing a grid bracket to rotate synchronously through two synchronous belts (9); the grid bracket comprises four insulation columns and upper and lower plastic fixing plates; a tinning copper wire is fixed on the two insulation columns of the grid bracket through a positioning pulley (10), wire tightening pulleys (11) and a steering pulley (12) of a pulley component (6) mounted on the nut (4) and the guide rod (5). The tinning copper wire is spirally wound and tightened on the grid bracket automatically according to the screw pitch of the screw rod through the transversal motion of the nut and the rotation of the grid bracket, so as to wind a grid; the grid wire is not perpendicular to the insulation columns, but forms a spiral inclined angle with the insulation columns; shadowless glue is brushed on the insulation columns at the positions in contact with the copper wire in a winding process to further fix the grid wire; as the space of the grid is ensured by screw pitch of the screw rod, the space of the grid after winding is uniform; the winding method is convenient to operate, and high in winding efficiency; the wire is wound tightly and not prone to loose to cause short circuit.

A heat-shrinkable tube heating device according to the present invention comprises a pair of heat source cartridges having structures that are symmetrical to each other. An air supply pipe and a heating pipe are arranged in each heat source box, a plurality of air ejection holes are formed in a row in the air supply pipe, a pair of heating pipes are arranged in parallel, and each heating pipe is arranged in an open area in the heat source box in a state of including a heat line emitting infrared rays. The blast pipe is disposed between the pair of heating pipes so as to be located further inward, and is provided so that pressurized air flowing into the pipe is ejected through the air ejection hole toward either one of both sides of the heat-shrinkable pipe placed for heating.

The invention relates to the technical field of agricultural machinery and in particular relates to a seed sun-curing turnover device which comprises a telescopic rod, a base platform and connecting plates. The seed sun-curing turnover device provided by the invention is designed in a sliding connection manner, gaps can be adjusted, and the separation effect of the device used as a rake is remarkably improved; the connecting plates are convenient and rapid to assemble and disassemble, and a connecting surface is clamped and fixed in a convex and concave manner, so that gaps are effectively eliminated; the connecting plates can be also used as a shovel, and thus seed leaking can be avoided in use; and the whole device is novel in structure, convenient to adjust and applicable to popularization.

The invention discloses a method for generating a broadband OFC (Optical Frequency Comb). A 50 line broadband optical frequency comb is generated by adopting a cascade structure of a DPMZM (Double-Parallel Mach-Zehnder Modulator) and two Mach-Zehnder IMs (Intensity Modulators) and adjusting a radio frequency amplitude and a direct current offset voltage of each modulator, the power is smooth, and the interval between spectral lines is adjustable. The optical comb performance generated in the scheme is relatively good, and great significance is achieved for the application and development of the broadband OFC in the optical communication field. The system structure of the device and method for generating the broadband OFC is relatively simple, easy to implement, and conductive to reducing the system cost.

The invention relates to a frame high-altitude piece mounting method of a dry quenching lifter device. The method comprises the following concrete steps of: lifting the two end beams of a frame piece component and a wheel group connected with the end beams onto a lifter track by use of a truck crane with tonnage of less than or equal to 300; lifting the two girders and accessories of the frame piece component to the position between the two end beams; assembling on a high-altitude construction platform so that the frame assembly work originally performed on the ground is finished at the high altitude; and in the frame assembly process on the high-altitude construction platform, firstly adjusting the space between the two end beams by use of an adjustable end beam fixing device, accuratelypositioning and mounting the two end beams on the lifter track by use of a wheel fixing device, and connecting the girders and the end beams to finish the mounting of the frame, wherein the accessories include a lower operation platform connected with the first girder and the second girder, and a walking first-level speed reducer arranged on the second girder. Compared with the traditional construction method, the method provided by the invention has the advantages of short construction period, low construction cost and the like, and is beneficial to construction.

The present invention discloses an experimental method and an experimental device for simulating ablation of a double-pulse solid rocket engine. The experimental method comprises: performing a first ablation experiment in a first rocket engine; after the experiment is completed, separating an experimental section and a first convergence section; assembling the experimental section and a second convergence section into a second rocket engine; and after a certain time interval, performing a second ablation experiment in the second rocket engine. According to the technical scheme of the present invention, the problems of the failure to research the influence of the pulse interval time on the ablation characteristics of the thermal insulation material and the failure to better simulate the working environment of the double-pulse engine are solved.

The invention relates to a breaker press-pull testing stand and a test method thereof, and solves the technical problems that a present press-pull type breaker test process is low in efficiency, highin cost and low in accuracy. The testing stand comprises a casing, a PLC, a two-position five-way solenoid valve, a cylinder and a clamp, the cylinder is connected with first and second magnetic switches, and a telescopic rod of the cylinder is connected with a magnet ring; the first magnetic switch and a first coil on the two-position five-way solenoid valve are connected in series and then connected between a first voltage pulse output port and a GND port of the PLC, and the second magnetic switch and a second coil on the two-position five-way solenoid valve are connected in series and thenconnected between a second voltage pulse output port and the GND port of the PLC; and a node between the first magnetic switch and the first coil on the two-position five-way solenoid valve is connected to a first switching value input port, a node between the second magnetic switch and the second coil on the two-position five-way solenoid valve is connected to a second switching value input port,and a gas outlet of the two-position five-way solenoid valve is connected with the cylinder. The testing stand and test method thereof can be widely applied to the technical field of reliability testof breakers.

The invention discloses a narrow-band filter based on a phase modulation apodized grating. An input single-mode waveguide is connected to an asymmetric gradient directional coupler via an input tapered waveguide; the asymmetric gradient directional coupler is connected with a curved output waveguide to realize reflective signal output; an upper port at a right end of the asymmetric gradient directional coupler is connected to a left end of an antisymmetric multimode waveguide apodized grating, and a right end of the antisymmetric multimode waveguide apodized grating is connected to the outputsingle-mode waveguide through the output tapered waveguide in order to achieve straight-through end signal output. A grating reflective signal is extracted by the asymmetric gradient directional coupler, the tolerance is large, and the insertion loss is small; the narrow bandwidth is adjustable by adjusting the spacing between the grating teeth and the waveguides; the multimode waveguide only supports two modes, which can avoid crosstalk caused by the coupling of other modes; apodization is realized by adjusting the phase of the grating, and the grating filter with the high sideband suppression ratio is realized, which greatly improves the performance of the grating filter.

The invention provides a device for separately installing a dry-quenching hoister frame. The device comprises an adjustable end beam fixing mechanism and a wheel fixing mechanism, wherein the wheel fixing mechanism mainly comprises a cushion block and two cushion block clamp plates, the two cushion block clamp plates are respectively welded at two sides of the cushion block, the lower parts of the two cushion block clamp plates are respectively drilled with a screw thread hole, and the cushion block is fixed on a track of a hoister by a puller bolt through the screw thread hole; and adjustable end beam fixing mechanism mainly comprises a seamless steel tube, a connecting clamp seat, a connecting steel plate and a plugging steel plate, wherein one end of the seamless steel tube is connected with the connecting clamp seat, the plugging steel plate is welded on the other end of the seamless steel tube, the connecting steel plate is movably connected with the connecting clamp seat by adopting a pin shaft bolt, therefore, the integral has two assemblies which are in bolted connection through forward and reverse threads, thus forming the adjustable end beam fixing mechanism. Compared with the traditional construction, the device has the advantages of short construction period, low construction cost, convenience for construction, and the like when used for separately installing the dry-quenching hoister frame.

The present invention provides a laser profile sensor calibration system and method based on intersections, including: a calibration object, a two-dimensional worktable, a laser profile sensor, a positioning mechanism and a computer, and the calibration object is fixed on the two-dimensional workbench And can move with the two-dimensional workbench, the laser profile sensor is located on the positioning mechanism and fixed, the calibration object has two intersecting planes, and the intersection line of the two intersecting planes is facing the laser A profile sensor; the computer is connected to the two-dimensional workbench and the laser profile sensor. The calibration object of the present invention has two intersecting planes, and the intersection point of the straight line formed by the line laser on the two planes is used as a spatial point, and the displacement method is used to calibrate the laser profile sensor, which has the advantages of simple calibration object, easy manufacture, and calculation of spatial point coordinates With outstanding advantages such as high precision and no influence of deformation, it is suitable for any type of contour calibration.