81results about How to "Precise Control of Spacing" patented technology

The invention relates to the field of high-voltage power transmission technology, and particularly relates to a test research device used for electrical performance research on mixed gas of high-voltage electrical equipment. The device comprises a lead terminal gas room connected with a high-voltage casing; the lead terminal gas room is connected with a horizontally-arranged barrel body; the barrel body is isolated by a basin-type insulator into a first test gas room and a second gas room; the first test gas room is adjacent to the lead terminal gas room; the barrel body of the first test gas room is provided with a mounting port; a flange used for mounting a test-used post insulator and a cover plate used for covering the mounting port are arranged at the mounting port; two guide rods coaxial in the horizontal direction and arranged at intervals are arranged in the second test gas room; the guide rod is provided with opposite end parts for removing an assembly contact or an arc contact or a shielding cover; and at least one of the two guide rods is in transmission connection with a driving mechanism used for driving the corresponding guide rod to move along the axial direction of itself so as to adjust the gap between the opposite end parts of the two guide rods. By adopting the device of the invention, dynamic and static tests can be carried out.

The invention discloses a low-frequency ultrasonic secondary atomizing spraying head controlled in an electromagnetic mode. The low-frequency ultrasonic secondary atomizing spraying head comprises a nozzle. A liquid inlet hole is formed in the nozzle and communicated with one end of a liquid outlet hole. A trapezoidal nozzle groove is formed in the tail end of the nozzle and provided with a trapezoidal secondary atomizing moving body. The other end of the liquid outlet hole is communicated with the trapezoidal nozzle groove. An iron core and the trapezoidal atomizing moving body are bonded together. A coil winds around the iron core which is covered with a protecting cover. The protecting cover and the trapezoidal secondary atomizing moving body are bonded. One end of a stop block supports the trapezoidal secondary atomizing moving body. A sponge is stuffed between the stop block and the trapezoidal secondary atomizing moving body and bonded to the stop block. The other end of the stop block is welded to the nozzle. Currents flowing into the coil are changed by adjusting a circuit, electromagnetic force can be adjusted accurately, the distance between the trapezoidal nozzle groove and the trapezoidal secondary atomizing moving body is controlled accurately, and therefore the size of generated mist drops can be accurately controlled.

The invention discloses a manufacturing method of a field emission ion neutralizer chip based on an SOI process. The manufacturing method comprises the following steps: (1) preparing an SOI substratewith a polished surface; (2) removing the top silicon and the silicon dioxide insulating layer in the target area by using photoetching and etching processes, and exposing the bottom silicon; (3) obtaining an array type photoresist pattern on the underlying silicon, and depositing a buffer layer and a catalyst layer to form a buffer layer-catalyst layer array; (4) forming a carbon nanotube array to obtain a cathode part; (5) preparing an array type through hole structure by using a silicon wafer as a grid substrate; (6) depositing a metal film on the through hole structure to obtain an anode part; and (7) bonding the cathode part and the anode part to obtain the field emission ion neutralizer chip. By improving the design and the like of the whole flow process of the preparation method, the obtained device can effectively overcome the field shielding effect and the heat effect, and has the advantages of being good in emission efficiency, low in power consumption and long in service life.

The present invention provides an epitaxial structure of an ultraviolet LED with an aluminum nitride film and a growth method of the aluminum nitride film. The growth method of the aluminum nitride film includes the following steps that: 1) a metal layer is grown on a substrate; 2) annealing treatment is performed on the substrate, so that the metal layer can form a metal ball-shaped object layer;3) etching treatment is performed on the substrate, so that a pitted substrate can be formed; 4) when temperature rises to 600 to 1200 DEG C, trimethylaluminum and ammonia gas are introduced into a reaction chamber, so that a buffer growth layer can be to grown; 5) when temperature rises to 1250 to 1450 DEG C, first growth mode/second growth mode alternate cyclic growth is carried out, so that anintermediate-state aluminum nitride layer can be formed; and 6) when temperature drops to 1100 to 1250 DEG C, the trimethylaluminum and ammonia are introduced into the aluminum nitride layer, so thatthird growth mode growth can be performed. The aluminum nitride film obtained by using the method has good crystal quality; and the surface cracks of the aluminum nitride film can be reduced.

The invention relates to an automatic grading device for energy saving and emission reducing automobile parts. The device comprises a vibration feeding unit, a distance adjusting unit and a detectingand grading unit which are sequentially arranged in the product moving direction. The distance adjusting unit comprises a conveying mechanism connected with the vibration feeding unit and a baffle distance adjusting mechanism arranged on the starting segment of the conveying mechanism. The detecting and grading unit comprises a weighing detecting mechanism arranged on the tail segment of the conveying mechanism and an air blowing grading mechanism. After the distance is adjusted by the baffle distance adjusting mechanism, products conveyed by the vibration feeding unit into the conveying mechanism enter the weighing detecting mechanism one by one to be weighed and then are classified and collected by the air blowing grading mechanism. Compared with the prior art, the automatic grading device continuously and automatically detects the weight of pressure cast products, and the quality of the products is subjected to grading and classification and collection according to the product weight; the device cost is low; the detection efficiency is high; operation is simple and convenient; total number detection on the products can be achieved; and the product quality can be precisely controlled.

The invention relates to configuration of high-vacuum and ultrahigh-vacuum equipment systems, in particular to a sample transfer and mask device for a thin-film deposition equipment system. The sample transfer and mask device comprises a mask plate transfer device, a mask plate, a detachable sample tray, a baffle, a cooling water pipe and a sample transfer rod, wherein the device is integrated with thin-film deposition equipment and is in a complete sealed state, and the high-vacuum or ultrahigh-vacuum state of the equipment system is not required to be interrupted during loading and unloading of a sample; the sample can be conveniently and reliably fixed, cannot fall when a sample table rotates in site or moves relatively in the technological process and cannot be influenced by the technological process such as thermal radiation during in-site high-temperature annealing; the position of the mask plate relative to the sample table can be adjusted accurately, and whether the mask plate and the sample, namely a clamp, are separated or attached can be accurately controlled; the mask plate can perform positioned displacement relative to the sample table and can also perform continuous displacement; the mask plate and motion control of the mask plate cannot be influenced by the high-temperature process.

The invention discloses a manufacturing method of an insulated gate bipolar transistor (IGBT). A backside technology comprises the following steps that N-iron implantation is performed on a back side of a silicon substrate so as to form an N-buffer; a solid mask plate is placed between the back side of the silicon substrate and a laser light source; a laser beam passes through the solid mask plate and carries out annealing on the N-buffer in a laser irradiation area so as to form a graphic structure which is formed by a high activation area and a low activation area; the laser beam reaches a position of the back side of the silicon substrate after passing through the solid mask plate and the position is changed so as to realize carrying out annealing on the N-buffers of different areas on the silicon substrate; finally, the annealing can be performed on the N-buffers of all the areas on the silicon substrate. By using the method of the invention, a space between the high activation area and the low activation area of the N-buffer can be accurately controlled; when a device is started, stable carrier distribution balance can be formed; when the device is started, diffuser efficiency of a collector region hole can be inhibited and a turn-off rate of the device is increased.

The invention provides an ultrathin lithium foil product and a preparation method thereof. The ultrathin lithium foil is a continuous and self-supporting strip-shaped foil with the lithium content of99.90%-99.99%. The thickness of the ultrathin lithium foil is 10-20 [mu] m, and the width of the ultrathin lithium foil is 10-500 mm. The surface of the ultrathin lithium foil is bright in color and is silvery white; the surface of the lithium foil is smooth, and holes and damage which can be visually observed do not exist; and the lithium foil has neat edges and no defects.

The invention provides a height-adjustable prefabricated box culvert and an adjustment method thereof. The height-adjustable prefabricated box culvert comprises a height-adjusting rod disposed on theside wall of the prefabricated box culvert, at least one embedded nut arranged in a row and disposed on the side wall surface of the prefabricated box culvert and bolts penetrating first threaded rodsto be fastened in the embedded nuts, wherein the height-adjusting rod is provided with the at least two first threaded holes arranged in a row; and the embedded nuts are matched with the first threaded holes. By causing the bolts to penetrate the first threaded holes at different positions and be fastened to the embedded nuts, the goal of adjusting the height of the prefabricated box culvert is achieved, and thus the influence of a cumulative construction error of to-be-installed prefabricated box culvert position on the top surface height of the prefabricated box culvert is reduced. The goalof accurately controlling the distance between the top surface of the prefabricated box culvert and a designed road surface/track surface is achieved, so that the inner diameter of a shield tunnel isoptimized, to achieve the goal of saving investment and reducing the construction difficulty.

The invention discloses a numerical-control roller bending device used for step guide rail bending, molding and processing. The numerical-control roller bending device used for step guide rail bendingcomprises a main body, wherein a spacing regulating mechanism is arranged inside the main body; two fixed mold mechanisms are arranged at the upper end of the spacing regulating mechanism; a movablemold mechanism is arranged on the upper surface of the main body; and one end of the upper surface of the main body is equipped with a pressure mechanism. The numerical-control roller bending device disclosed by the invention has the beneficial effects that: spacing regulation between the two fixed mold mechanisms is more synchronous by the spacing regulating mechanism via a two-way threaded rod,and manual operation is not needed; step guide rails of different bending amplitudes are rolled by regulating different spacings, and contact points between fixed molds of the two fixed mold mechanisms and the step guide rails change, so that a slide block can be effectively fixed through a slide plate and a limiting slot without sliding; and a third motor is used for regulating, so that a strokeof a hydraulic rod can be changed to change movement amount of the movable molds to change depth of roller-pressing, and thus, roller-pressing radian of the step guide rails can be freely regulated.

The invention belongs to the field of agricultural planting, and particularly relates to an adjustable pit digging device for agricultural planting, which comprises a base, a support frame is fixedly connected to the base, a control box is fixedly connected to the support frame, two threaded sleeves are rotatably connected between the control box and the support frame, screws are in threaded connection in the threaded sleeves, the lower ends of the two screws are jointly and fixedly connected with a frame, the frame is in sliding connection with the supporting frame, the frame is rotationally connected with a two-way lead screw, and the two-way lead screw is in threaded connection with two threaded blocks. Through an arranged control mechanism, the digging depth of drill rods matched with spiral blades can be accurately regulated and controlled, through an arranged speed increasing mechanism, the rotating speed of the spiral blades can be increased, then the digging efficiency is improved, the labor loss of manual digging is avoided, through an arranged driving mechanism, the distance between the two drill rods can be regulated and controlled, and the distance between every two pits can be accurately regulated and controlled.

The invention discloses a sand core mounting structure of a box for an automobile and a mounting method thereof, and relates to the technical field of sand core manufacturing. The sand core mounting structure of the box for the automobile and the mounting method thereof solve the circumstances that an existing split sand core structure is unstable in positioning, and sand cores are easily cracked,staggered and displaced after being assembled. The sand core mounting structure comprises a box die, and a metal base which is arranged on a lower die, wherein the sand cores are sequentially assembled on the metal base. The mounting method comprises the following sequential steps: positioning a small water channel sand core and a main sand core; closing a die at the rear side, and mounting a lugsand core; lapping a cross and core in a flow distribution hole; mounting the main sand core on the cross sand core; positioning a water channel sand core to the metal base and the main sand core; closing the die; and detecting whether the sand cores are subjected to cracking, staggering and displacing. According to the abovementioned technical scheme, the sand core mounting structure of the boxfor the automobile and the mounting method thereof, the sand core positioning and mounting stability can be effectively improved; the mounting is simple and quick; the positioning is accurate; in addition, the air exhausting effect of the split sand core structure in the box casting process can be completed.

The invention provides a cleaning device for a welded circuit board. The cleaning device comprises a shell device fixedly connected to a volatilization device through a bolt, a supporting structure connected to the shell device in a sliding mode, a turn-over device connected to the supporting structure through a rotating shaft, an adjusting device connected to the turn-over device through a rotating shaft, a positioning device connected to the adjusting device in a sliding manner, a dust removal structure connected to the shell device through a rotating shaft, and a cleaning device fixedly connected to the shell device. The shell device is arranged, the mode that an isolation plate is installed on the shell device is adopted, the interior of an installation box body can be separated, and through the arrangement of the isolation plate, board washing water can be prevented from splashing in the cleaning process of the circuit board, and the safety of the equipment in the using process is effectively improved.

The invention relates to the technical field of corrugated boards and discloses a glue liquid level controllable corrugated paper single facer based on a theory of a communicating vessel. The glue liquid level controllable corrugated paper single facer comprises a rack body, wherein an upper corrugated roller is movably connected in the rack body, a lower corrugated roller is movably connected outside the upper corrugated roller, a paper pressing roller is movably connected outside the lower corrugated roller, a paper guiding roller is movably connected outside the paper pressing roller, a gumming roller is movably connected outside the lower corrugated roller, a scraper blade is movably connected outside the gumming roller, an adjusting rod is fixedly connected outside the scraper blade,an adjusting spring is connected outside the adjusting rod in a sleeving manner, and an adjusting nut is connected outside the adjusting rod by a thread. By matching the scraper blade, a coating roller and the gumming roller in use, the uniformity of glue on the surface of the gumming roller is guaranteed and the uniform gumming effect is achieved, so that the bonding quality of core paper and theboard is guaranteed effectively and the quality of the corrugated board is improved.

The invention discloses a low-rank coal anaerobic upgrading, grading and grading system, and belongs to the technical field of raw coke oven gas production. The technical problem to be solved is to provide the low-rank coal oxygen-free upgrading, grading and grading system, low-rank coal is subjected to oxygen-free cracking to generate raw coke oven gas, the production cost is saved, and the production quality is improved. The adopted technical scheme is as follows: the system comprises a heat exchange furnace, a cooler, a rotary kiln, a raw coal preheater, a cyclone dust collector, a main fan, a desulfurizing tower, a raw coal conveyor and a carrier output fan. The heat of the high-temperature combustion gas is transferred to the raw coke oven gas carrier in a heat conduction manner; theraw coke oven gas carrier enters the rotary kiln in a closed oxygen-free environment and is subjected to cracking reaction with the low-rank coal to generate a large amount of raw coke oven gas, and the heat carrier is the same product and is doped with few impurities, so that the influence of burning coal impurities and air impurities on the product is avoided, the low-rank coal on the market isconsumed, and enterprise benefits are formed.