36results about How to "Same diameter" patented technology

The invention discloses a polycrystal black silicon texturing process. The polycrystal black silicon texturing process includes the following steps that 1), a polycrystalline silicon wafer is polishedthrough polishing liquid; 2), the polished silicone wafer is hole-dug through hole-digging treating liquid, and nano-holes are prepared in the surface of the silicone wafer; 3), the hole-dug siliconewafer is de-silverized, and silver particles on the silicone wafer are removed; 4), the de-silverized silicone wafer is chambered through chambering treating liquid, and micro-nano holes are preparedin the surface of the silicone wafer. According to the polycrystal black silicon texturing process, by means of control over the three key steps of polishing, hole-digging and chambering, the whole black silicone texturing process is controllable, polycrystal black silicon with the good appearance and high efficiency can be prepared, and the prepared polycrystal black silicon is fuzzy in appearance and is provided with uniform holes.

An optical fiber includes a clad portion and a core portion surrounded by the clad portion. Here, the clad portion is formed by substantially pure quartz, and the core portion has a higher refractive index than the clad portion. The optical fiber is characterized in that a relative refractive index difference of a center of the core portion falls within a range from 0.15% to 0.30%, and a maximum relative refractive index difference of the core portion falls within a range from 0.4% to 0.6%. Here, it is preferable that an average relative refractive index difference of the core portion falls within a range from 0.30% to 0.40%. Here, a mode field diameter of the optical fiber falls within a range from 8.6 μm to 9.5 μm at 1310 nm, and a cable cutoff wavelength of the optical fiber is equal to or lower than 1260 nm. Note that, after the optical fiber is subjected to hydrogen aging, a loss of the optical fiber is preferably equal to or lower than 0.4 dB / km at 1383 nm.

A method for the thermal compression welding of a copper-aluminum combined pipeline fitting under the assistance of rotary friction is disclosed, relating to the field of thermal compression welding process and solving the problem that the used aluminum pipe has an interior oxide film which is hardly removable and also has low production efficiency and high cost when professional welding equipmentis used to weld the copper-aluminum combined pipeline fitting in the prior art; the method comprises the steps that: the outer wall of one end of a copper pipe to be welded is processed into a tapered surface, the copper pipe is secured at a drill chuck of a drilling and milling machine while the aluminum pipe is secured on a clamp of the drilling and milling machine, one end with tapered surfaceof the copper pipe is inserted into one end of the aluminum pipe, and the sleeved section between the copper pipe and the aluminum pipe is heated up using an acetylene flame gun, when the temperaturereaches 400-500 DEG C, the copper pipe is rotated and the other end of the copper pipe is pressurized so that the copper pipe is inserted into the aluminum pipe, and heating is ceased to accomplish total welding between the copper pipe and the aluminum pipe. The method in the invention is applied to welding the combined pipeline fittings in refrigeration products.

The invention belongs to the technical field of well drilling, and particularly relates to an over-well drill bit pressing mechanism for well drilling. The mechanism comprises a drill rod fixing mechanism sliding groove, a first rotary shaft, a second gear, a first gear, a threaded pressing mechanism, a drill rod body, a drill rod connecting structure, a drill rod fixing mechanism and a hollow driving rotary shaft, wherein the hollow driving rotary shaft and the drill rod body are connected through the drill rod fixing mechanism, the drill rod fixing mechanism can slide in the drill rod fixing mechanism sliding groove, and the hollow driving rotary shaft is in thread fit with a thread structure; a driving motor rotary shaft rotates to drive the first rotary shaft through the gear assembly to rotate, and the hollow driving rotary shaft moves downwards so as to press the drill rod while rotating under the driving of the first rotary shaft and the action of the thread structure. Furthermore, the drill rod connecting mechanism is compact in structure, it can be guaranteed that the diameter of the connection position is identical with that of the drill rod body, and damage of an oversized drill rod connecting structure to a borehole surface is avoided. The whole mechanism has a certain practical effect.

A spark plug designed for fitting in tight spaces of an engine compartment is disclosed. The spark plug has a conductive terminal attached to one end of a flexible central electrode and has a ceramic insulator partially encasing the flexible central electrode. The part of the flexible central electrode between the ceramic insulator and the conductive terminal is encased in a flexible insulator. The flexible part of the central electrode may be bent away from the axis of the ceramic insulator accommodating both installation and servicing of the spark plug in tight spaces.

The invention belongs to the technical field of dumbbells, and particularly relates to a share-based dumbbell. The share-based dumbbell comprises weightlifting block mechanisms, a handheld rod mechanism and code scanning regions, wherein the handheld rod mechanism is mounted between the two weightlifting block mechanisms; and each code scanning region is mounted on the corresponding weightliftingblock mechanism. The handheld rod mechanism which is mounted between the two weightlifting block mechanisms is used for connecting the two weightlifting block mechanisms; the two weightlifting block mechanisms are separately provided with the corresponding code scanning regions, so that the use right of the dumbbell is controlled, and only persons who scan the code can use the dumbbell; when the persons do not scan the code, the handheld rod mechanism will deform when a user uses the dumbbell but does not scan the code, then, the two weightlifting block mechanisms can be combined together, andat the moment, the dumbbell cannot be used normally; and after the user scans the code, the handheld rod mechanism can become hard at the moment, and then the user can use the dumbbell normally.

The invention belongs to the technical field of well drilling, and particularly relates to an over-well drill bit pressing mechanism for well drilling. The mechanism comprises a drill rod fixing mechanism sliding groove, a first rotary shaft, a second gear, a first gear, a threaded pressing mechanism, a drill rod body, a drill rod connecting structure, a drill rod fixing mechanism and a hollow driving rotary shaft, wherein the hollow driving rotary shaft and the drill rod body are connected through the drill rod fixing mechanism, the drill rod fixing mechanism can slide in the drill rod fixing mechanism sliding groove, and the hollow driving rotary shaft is in thread fit with a thread structure; a driving motor rotary shaft rotates to drive the first rotary shaft through the gear assembly to rotate, and the hollow driving rotary shaft moves downwards so as to press the drill rod while rotating under the driving of the first rotary shaft and the action of the thread structure. Furthermore, the drill rod connecting mechanism is compact in structure, it can be guaranteed that the diameter of the connection position is identical with that of the drill rod body, and damage of an oversized drill rod connecting structure to a borehole surface is avoided. The whole mechanism has a certain practical effect.

The invention relates to the field of commercial kitchenware, in particular to a double-fire-hole characteristic combustor formed by vertically stacking thin pipe annular row sets. Thin pipes 2 are uniformly distributed on the surface of one surface of an annular partition plate 4 by a circle; the outlet of the thin pipes 3 faces a combustion chamber 5-1; the inlet of the thin pipes 3 faces a firedistribution chamber 1-1; a plurality of annular partition plates 4 on which the thin pipes 3 are distributed are stacked together to form a distributor 3-1 of the combustor; holes with the cross sections similar to triangles formed between the outer walls of every two adjacent thin pipes 3 and the surface of the annular partition plate 4 are auxiliary fire holes 3-1-2. The auxiliary fire holes 3-1-2, the inner holes of the thin pipes 3 and the main fire holes 3-1-1 jointly form double characteristic fire holes of the fire distributor 3-1, wherein the combustion chamber 5-1 is arranged in thecenter area of the fire distributor 3-1, a distribution chamber gland 2 is arranged on the fire distributor 3-1, a distribution chamber outer barrel 1 is connected to the lower part of the outermostperiphery of the distribution chamber gland 2. The gas combustor which is identical in size of fire hole diameter and excellent in combustion performance can be provided.

A method for the thermal compression welding of a copper-aluminum combined pipeline fitting with the assistance of rotary friction to remove an aluminium tube oxidation film relates to the field of thermal compression welding process and solving the problem that the prior connection method of the conventional aluminum tube has poor connection compactness and low finished product ratio due to the compact oxidation film in the used aluminum tube. The method comprises the following steps: the outer wall of one end of a copper pipe to be welded is processed into a tapered surface, the copper pipe is secured at a drill chuck of a drilling and milling machine while the aluminum pipe is secured on a clamp of the drilling and milling machine, one end with tapered surface of the copper pipe is inserted into one end of the aluminum pipe, and the sleeved section between the copper pipe and the aluminum pipe is heated up using an acetylene flame gun, when the temperature reaches 400-500 DEG C, the copper pipe is rotated and the other end of the copper pipe is pressurized so that the copper pipe is inserted into the aluminum pipe, and heating is ceased to accomplish total welding between the copper pipe and the aluminum pipe. The method in the invention is applied to welding the combined pipeline fittings in refrigeration products.

The invention relates to the field of printing, and in particular, discloses a bill printing machine. The bill printing machine comprises a detecting mechanism; the detecting mechanism comprises a first conveying roller, a second conveying roller, a first ejector rod, a second ejector rod and a circuit; the first ejector rod is elastically mounted on the side surface of the first conveying roller;the second ejector rod is elastically mounted on the side surface of the first conveying roller; the end, far from the first conveying roller, of the first ejector rod can be contacted with the end,far from the second conveying roller, of the second ejector rod; the diameters of the first printing roller, the second printing roller, the first conveying roller and the second conveying roller areconsistent; an indicating lamp is arranged in the circuit; an electric conducting first connecting block is arranged at the end, far from the first conveying roller, of the first ejector rod; an electric conducting second connecting block is arranged at the end, far from the second conveying roller, of the second ejector rod; and the first connecting block can be contacted with the second connecting block. The bill printing machine can perform punching positioning on multiple layers of bills before merging to improve the bill processing precision.

The invention discloses a wet-process groove type black silicon texturing method. The method comprises the following steps: carrying out surface treatment on a silicon wafer, and putting the silicon wafer into a primary treatment groove to remove line marks on the surface of the silicon wafer so as to obtain a primary silicon wafer with the smooth surface; performing hole digging and texturing onthe silicon wafer subjected to surface treatment, and putting the obtained primary silicon wafer into a secondary treatment groove for reaction for 180-220s to obtain a secondary silicon wafer with nanoscale small holes in the surface, wherein before the primary silicon wafer is put into the secondary treatment groove, a mixed solution in the secondary treatment groove stops flowing circularly 10-20s in advance until the hole digging is completed; carrying out hole expanding on the silicon wafer subjected to the hole digging and texturing, and putting the secondary silicon wafer subjected to the hole digging into a tertiary treatment groove for treatment for 85-95s to obtain a tertiary silicon wafer; and putting the obtained tertiary silicon wafer into a cleaning groove to obtain a siliconwafer with no metal ions on the surface, and drying the cleaned silicon wafer to obtain a finished silicon wafer. The obtained textured silicon wafer is same in hole size and good in uniformity.

The invention discloses a precision semen euryales shelling device which comprises a body, rotary shafts, support guide rails, a driving device, a pushing device, a cutting device and fixing ejector pins. The body is connected with the support guide rails, the support guide rails are symmetrically arranged inside the body, the rotary shafts are arranged on the inner sides of the support guide rails and comprise inner-circle rotary shafts and outer-circle rotary shafts, and the outer-circle rotary shafts and the inner-circle rotary shafts can rotate around a concentric circle. The precision semen euryales shelling device has the advantages that semen euryales can be mechanically automatically precisely shelled, accordingly, the shortcomings of severe damage on fruits and harm on the integral quality of existing semen euryales due to the traditional manual and partial mechanical shelling can be overcome, the semen euryales shelling success rate can be increased, the shelling speeds can be effectively increased, and the production values and the benefits can be greatly increased.

The invention discloses a high-efficiency motor coil winding method. Multiple wire wheels are fixed on multiple pay-off frames, and multiple coils that need to be wound are fixed on the rotating shaft through lock nuts and come out from the wire wheels. The wire passes through the guide wheel and is wound on the corresponding coil after being wound on it for a week; the motor drives the rotating shaft fixedly connected to the driven sprocket through the driving sprocket to rotate for automatic winding; the driven sprocket is adjusted through the sprocket locking device. Whether the sprocket is on the rotating shaft, and then select whether the rotating shaft rotates synchronously with the motor according to needs, thereby selecting the number of coils to be wound at the same time. The present invention drives a plurality of winding mechanisms to rotate through a transmission shaft, and simultaneously winds a plurality of coils, thereby improving the production efficiency of coils and motor products; The wire can drive the rolling wheel to slide back and forth on the transverse guide rail, thereby improving the flatness of the coil and saving the production cost.

The invention belongs to the technical field of well drilling and specifically relates to a rotary driving and pushing mechanism for a well-drilling drill column. The rotary driving and pushing mechanism comprises a drill rod fixing mechanism, a driving motor, a pushing hydraulic rod, a hollow driving rotary shaft, a drill rod connection structure, a hydraulic rod fixing support and drill rod bodies. The driving motor is fixed to the hydraulic rod fixing support through the pushing hydraulic rod. Stretching-out and drawing-back of the hydraulic rod can drive the driving motor to move up and down. A rotary shaft of the driving motor is the hollow driving rotary shaft. The hollow driving rotary shaft can drive the drill rod bodies to rotate and move up and down through the drill rod fixing mechanism. The two drill rod bodies are connected together through the drill rod connection structure. The designed drill rod connection structure and the drill rod fixing mechanism are organically combined, so that the connection and driving functions of the drill rod are achieved. In addition, the drill rod connection structure is compact in structure, so that the effect that the diameter of the connection position is the same as that of the drill rod bodies can be ensured, and damage to a well drilling face due to a too large drill rod connection structure is avoided. The whole mechanism has a certain practical effect.

The invention belongs to the technical field of metal processing and discloses a novel slitting machine system. The system comprises a base, wherein an uncoiler is arranged at a right end of the base,a slitting machine detection module is arranged on a front side of the middle, a support and a slitting gear wheel are installed on an upper side through bolts, two cutter shafts are vertically arranged in the middle of the support in sequence, blades are installed on the cutter shafts, rotating shafts are vertically and sequentially installed on the left side and the right side of the support through bolts, carrier rollers are fixedly connected with the rotating shafts, a flattening device is arranged at a left end of the base, a lower right corner of the flattening device is only provided with a winding device on a front side of the base, and an outer side of the winding device is sleeved with a plastic sleeve. The system is advantaged in that through a carrier roller structure, vertical vibration of steel material conveying is reduced, and a phenomenon of tool shifting cannot be caused; limiting is conducted through the thickness of a plurality of rolled steel strips by means of aplastic sleeve on an outer side of the winding device, so the rolled steel strips are consistent in diameter and easy to store; by arranging pipe coil packing belt scissors and a longitudinal shearingpacking storage device, the sheared strip steels are easy to pack and store.

The invention belongs to the technical field of well drilling and particularly relates to an over-well pressure applying deep well drilling mechanism based on an automatic reinforced drill bit. The over-well pressure applying deep well drilling mechanism comprises an over-well pressure applying mechanism, a drill rod positioning mechanism and the automatic reinforced drill bit. The drill rod positioning mechanism is installed on a drill rod of the over-well pressure applying mechanism. The automatic reinforced drill bit is installed at the bottom end of the drill rod of the over-well pressure applying mechanism. The over-well pressure applying mechanism applies pressure through thread fit of a threaded structure, and has the advantages of being small in size and easy to control. A drill rod connecting mechanism is compact in structure, the effect that the diameter of the junction is identical to that of a drill rod body can be guaranteed, and the situation that the surface of a drilled well is damaged due to an excessively large drill rod connecting structure is avoided. Three sets of extension bars are adopted by the drill rod positioning mechanism so the drill rod can be positioned in the center, and the well surface can be reinforced through pressing wheels. The automatic reinforced drill bit can automatically adjust reinforcing pieces through a control motor according to the hardness of rock, and accordingly the service life of the drill bit is prolonged. A whole well drilling platform has a good practical effect.