58results about How to "Precise size adjustment" patented technology

The invention discloses a novel tunnel lining segment mold. The novel tunnel lining segment mold comprises a bottom mold body, end mold bodies symmetrically arranged on the two sides of the bottom mold body and side mold bodies symmetrically arranged at the top of the bottom mold body. The bottom ends of the side mold bodies and the bottom ends of the end mold bodies are connected with the bottommold body through hinges, the side mold bodies and the end mold bodies are positioned on the bottom mold body through adjustable conical positioning devices, the side mold bodies and the end mold bodies are positioned through conical positioning devices, the side mold bodies, the bottom mold body and the end mold bodies are locked through locking devices, and mold starting devices are arranged between the side mold bodies and the bottom mold body as well as between the end mold bodies and the bottom mold body. The novel tunnel lining segment mold is accurate in positioning, stable in structureand high in precision, no clearing dead corners exist, and the novel tunnel lining segment mold can adapt to attachment type vibration and improve product quality.

An overload protection transmission gear comprises a gear outer ring and a gear inner ring which are arranged in a sleeved mode. The gear outer ring is provided with a plurality of mounting holes, and an ejection head and an ejection head spring are arranged in each mounting hole, wherein one end of the ejection head spring is matched with the ejection head, and the other end of the ejection head spring is limited into the mounting hole through an ejection head spring pin; the gear inner ring is provided with a plurality of location grooves corresponding to the mounting holes, and the location grooves are used for containing transition sections of the ejection heads. The overload protection transmission gear can control transmitted torque and prevent other parts from being damaged by overload.

The invention aims at providing a jaw frame type bionic movement mechanism fatigue test device. The jaw frame type bionic movement mechanism fatigue test device comprises a jaw frame type bionic movement mechanism, a motor, a speed reducer, a groove-cam mechanism and a base, wherein the jaw frame type bionic movement mechanism, the motor, the speed reducer and the groove-cam mechanism are arranged on the base; the speed reducer is connected with the motor and the groove-cam mechanism respectively; and the jaw frame type bionic movement mechanism is connected with the groove-cam mechanism. Thejaw frame type bionic movement mechanism fatigue test device has a simple structure, is practical, convenient to carry, intelligent to control and accurate to test, can precisely adjust the size according to various opening requirements of the activity of a multi-bending spring on the cheek side, precisely measure a fatigue period of the multi-bending spring and immediately brake when the multi-bending spring is broken, and is applied to fatigue performance test of the multi-bending spring effectively.

The invention belongs to the technical field of crushers, and in particular relates to a counter-roll crusher with grinding rollers with a fixed-axis support structure. The invention includes a crusher frame, the crusher frame is provided with a fixed roller part and a movable roller part, a crushing discharge port is formed between the fixed roller part and the movable roller part, and the crusher frame is provided with There are drivers. In the present invention, by setting the discharge port adjustment component, when crushing ore of different sizes, the discharge port adjustment component drives the moving roller part to move to the end close to or away from the fixed roller part, so as to adjust the size of the crushing discharge port, which can reduce the work intensity of the staff. , Precisely adjust the size of the discharge port, ensure that the size of the discharge port is consistent within the full length of the roller, and maintain the crushing discharge port, which can overcome the disadvantages of traditional models that cannot crush hard ores, and can be used in the production of metal mines, greatly reducing The cost of crushing metal mines, and at the same time, it can pass through the iron regulator during crushing. Accurately determine whether the iron is too high to ensure the safety of the equipment.

The invention provides a green synthesis method of a cadmium selenide nano-cluster and a cadmium selenide nanocrystal with controllable size. In the method, a series of low toxic / economical ligands are adopted, a selenium elementary substance and cadmium oxide dispersed in a non-ligand solvent are taken as precursors, and the cadmium selenide nano-cluster and the cadmium selenide nanocrystal are synthesized in the non-ligand solvent. The size can be adjusted within 0.7nm-13nm by adjusting the proportion of the ligands and the precursors. The obtained nanocrystal has high crystallinity and narrow size distribution fwhm which equals 25 plus or minus 2nm, relatively high fluorescence quantum efficiency which is 5%-38%, and a fluorescence emission spectrum can be adjusted within 450nm-690nm.

The invention provides a carbon material with two-level pore channels, and a synthesis method thereof, wherein the carbon material comprises amorphous carbon, and has two-level pore channels. The synthesis method comprises: screening a Beta molecular sieve; placing the Beta molecular sieve in a sodium benzoate solution, and treating; mixing the Beta molecular sieve, saccharide, an auxiliary agentand water, and carrying out stirring ultrasonic treatment; carrying out drying treatment and high temperature treatment; and finally treating in an alkali solution to obtain the macroporous carbon material. According to the present invention, with the method, the expensive organic additives are not used, and the prepared macroporous carbon material has uniform pore size distribution.

The invention discloses a specimen clamping device for a large-diameter separated Hopkinson compression bar, which includes a fixed end and a sliding end, the fixed end includes a fixed sleeve, and a fixed collar is sleeved on the fixed sleeve. There are several fixing holes on the ring; the sliding end includes a sliding sleeve, and the sliding sleeve is connected to the sliding collar through a number of evenly opened chute slots; A positioning hole is opened on the collar corresponding to the position of the slider, and a positioning piece is installed in the positioning hole; a plurality of connecting holes are opened on the sliding collar, and the connecting holes and the fixing holes are respectively connected with two ends of the elastic element. The invention can solve the problems of insufficient support reliability and low positioning accuracy of the specimen clamping device in the prior art, has high reliability, small randomness and good versatility, and can be flexibly adjusted and adjusted according to the specimen size and specimen strength. Assembly, and easy to disassemble and assemble; the pre-clamping force can be adjusted in a large range and has strong applicability.

The width dynamically adjustable conveying device of the present invention is to solve the above-mentioned problems existing in the prior art and obtain the specific shape size and position of the current package based on visual recognition technology, and adopt the method of randomly adjusting the side baffles of the conveying device The opening and closing angle is expected to realize dynamic adjustment of the conveying width at any time and is suitable for fully automatic directional conveying and tallying of multi-standard parcels, so as to realize unimpeded passage of parcels, improve conveying efficiency and prevent congestion. It includes a frame and a visual recognition device arranged vertically above the frame; at least on the baffle on one side of the frame, there is an adjustable baffle driven and connected by an angle adjustment device; the angle adjustment device has a support A rod assembly and a push rod assembly, the push rod assembly includes an electric cylinder installed on the baffle, the output shaft of the electric cylinder is connected to one end of the connecting rod through a connecting fork and a joint bearing, and the other end of the connecting rod is connected to the adjustment baffle through a joint bearing; Connect the support rod assembly between the frame and the adjustment baffle.

Optical fiber wireless single sideband modulation system with self-adaptive optical load side ratio, involving optical fiber communication, long-period fiber grating, microwave photon technology, the system includes: continuous wave laser (1), two-electrode Mach-Zehnder modulator (2 ), sine wave local oscillator (3), 90-degree power splitter (4), bias voltage regulator (5), dynamic polarization controller (6), polarization beam splitter (7), first long-period optical fiber Grating (81), second long-period fiber grating (82), polarization beam combiner (9), Y splitter (10), optical fiber (11), first photodetector (121), optical interleaver (13) , a second photodetector (122), a third photodetector (123), and a current comparator (14). The above devices are connected sequentially. The invention can make the change of the optical load side ratio of the single sideband modulation signal adaptive to system parameters, and keep it at 0dB all the time, so as to maintain the system performance in the optimal state.

The invention discloses an electromagnetically controlled low-frequency ultrasonic secondary atomization nozzle, which includes a nozzle, a liquid inlet hole is opened on the nozzle, the liquid inlet hole is connected to one end of the liquid outlet hole, the end of the nozzle is a trapezoidal nozzle groove, and the trapezoidal nozzle groove is set Trapezoidal secondary atomizing mover, the other end of the liquid outlet hole is connected to the trapezoidal nozzle groove; the iron core is bonded to the trapezoidal secondary atomizing mover, coils are wound on the iron core, and the iron core is covered by a protective cover to protect The cover is bonded to the trapezoidal secondary atomizing mover; one end of the block supports the trapezoidal secondary atomizing mover, and a sponge is inserted between the block and the trapezoidal secondary atomizing mover, and the sponge is bonded to the block, and the stopper The other end is welded to the nozzle. By adjusting the circuit to change the size of the inflow current in the coil, the magnitude of the electromagnetic force can be precisely adjusted, and the distance between the trapezoidal nozzle groove and the trapezoidal secondary atomizing mover can be precisely controlled, thereby accurately controlling the size of the generated droplets.

The present invention provides a carbon material and a synthesis method thereof, wherein the carbon material comprises amorphous carbon, and has two-level pore channels. The synthesis method comprises: screening a Beta molecular sieve; placing the Beta molecular sieve in a sodium benzoate solution, and treating; mixing the Beta molecular sieve, saccharide, a silica sol and water, and carrying outstirring ultrasonic treatment; carrying out drying treatment and high temperature treatment; and finally treating in an alkali solution to obtain the macroporous carbon material. According to the present invention, with the method, the expensive organic additives are not used, and the prepared macroporous carbon material has uniform pore size distribution.