81results about How to "Reduce the number of holes" patented technology

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention relates to a fast and highly-efficient tunneling method for a large section of a hard-rock tunnel in a coal mine by combination of fully-mechanized tunneling and blasting driving. As shown in the figure 1, a cut hole with the borehole diameter of Phi 40.0 mm and a reliever hole with the charge diameter of Phi 35.0 mm are arranged in the section of the hard-rock tunnel with the protodyakonov coefficient f larger than 10.0 for digging out a groove cavity with s approximately equal to 14.0 m<2>. As shown in the figure 2, the cut hole adopts a three-stage oblique cut with stages deepening and angles of inclination increasing stage by stage. The consumption of charge in unit volume is determined based on the hard-rock protodyakonov coefficient and shot hole depth according to quantification of the figure 3. Three stages of oblique cuts respectively select I, III, IV-section millisecond delay detonators. A V-section millisecond delay detonator is selected by the reliever hole. The oblique cuts and the whole section of the reliever hole are detonated once with the total delay time no more than 130.0ms. After the groove cavity is formed in a blasting method. The reasonable tooth parameters are selected to rapidly expand the groove cavity to the design section and contour is finished under effect of a free surface of a fully-mechanized coal winning machine. Due to millisecond delay detonation of the oblique cut in three stages and larger borehole diameter, stemming is blocked to increase so that rocks do not affect the fully-mechanized coal winning machine after the working surface during the throwing process. The safe and efficient effect can be achieved.

The invention discloses a method and a structure for reinforcing flat hole grouting roadbed without damaging road surface. The method comprises the following steps of A. determining the positions of grouting holes; B. drilling horizontal or slant grouting holes to ensure that the drilling angle is orthogonal to the main damaging direction of the roadbed; C. striking the grouting holes in an interlaced mode; D. drilling and grouting from the periphery of the damaged roadbed to the inside; E. arranging grouting floral pipes; F. arranging seamless grouting outer pipes at the front ends of the grouting holes which penetrate through the cross section of the roadbed and are dimensionally and crossly distributed; G. uniformly filling cement grouts and determining grouting pressure through tests and areas; and H. performing sedimentation, inclination, deformation and displacement observation on the roadbed surfaces, structures and surrounding buildings during grouting. Horizontal or inclined drilling is carried out on roadbed slopes in the affected area for forming the grouting holes, the grouting floral pipes and the seamless grouting outer pipes are arranged, and the grouting floral pipes are connected with the seamless grouting outer pipes by virtue of joint by screws. The method is feasible and convenient to carry out; because of no-damage road surface structure, the bearing capacity and the stability of the roadbed structure in the affected area are obviously improved, and the reinforcement effect is high.

The invention provides a preparing method of a high-strength soft magnetic composite material. According to the method, Fe with a great reserve volume is selected to be used as a magnetic powder material, so that the cost of the raw material is low; a liquid phase reducing method is used for obtaining passivated iron powder; then, a high-energy ball mill is used for performing ball milling on high-purity magnesium oxide powder; particles with the granularity being 80nm to 100nm are obtained; then, the passivated iron powder and the refined magnesium oxide powder are uniformly mixed by a mechanical mixing method; and the high-strength soft magnetic composite material is obtained through pressing and heat treatment. The prepared soft magnetic composite material has the advantages of high resistivity, small eddy current loss, few hole defects and high strength. The high-strength soft magnetic composite material is applied to a stator and a thrust disc of an electromagnetic thrust bearing.

The invention discloses a large-aperture imaging photon sieve and a production method thereof, which belong to the technical field of diffractive optical elements. The large-aperture imaging photon sieve comprises a transparent substrate and an opaque metal thin film plated on the transparent substrate, wherein, a plurality of transparent small holes are randomly distributed on the opaque metal thin film, and the transparent small holes which are randomly distributed lead diffraction light to generate mutual interference, thereby effectively suppressing sidelobe effect and high-level diffraction, improving resolution and obtaining more sharp focal spots. The production method adopts a Connes shaping function for shaping the small holes which are randomly distributed, thereby reducing the number of the holes, reducing the data amount of a layout, optimizing the overall distribution of the small holes, leading the imaging focal spots to be more sharp and leading the level of the existing processing technology to be capable of meeting the manufacturing needs of the large-aperture photon sieve.

The invention discloses a sunk well structure, comprising a well body which is round in the outer profile of the section and provided with a central hole in the center, a well wall is formed on the well body on the periphery of the central hole and provided with a plurality of round holes parallel to the central hole, and the round holes are symmetrically distributed with the axis of the well body as a center. The sunk well structure of the invention has the advantages of simple structure, fewer hole number and reasonable stress, and the section of the sunk well is in a centrosymmetry structure and the well holes comprises big holes and small hole, therefore, construction operation and positioning control are convenient when sinking.

The invention relates to a field stop type IGBT device with a terminal structure and a manufacturing method of the field stop type IGBT device. An IGBT device structure is arranged in a cell region of the first primary side of a semiconductor substrate, and a terminal protection structure is arranged in a terminal region of the first primary side. Collector metal making ohmic contact with a second conduction type collector region is arranged on the second primary side of the semiconductor substrate, and the second conduction type collector region is isolated from a first conduction type drifting region through a first conduction type buffer region. The second conduction type collector region comprises a second conduction type first collector region located in the cell region and a second conduction type second collector region located in the terminal region. The first conduction type buffer region comprises a first conduction type first buffer region located in the cell region and a first conduction type second buffer region located in the terminal region. According to the field stop type IGBT device, switching losses of an existing field stop type IGBT device can be effectively reduced, and use reliability of the IGBT device is improved.

The invention provides an SOI (Silicon-On-Insulator) structure with reinforced anti-irradiation performance and a manufacturing method thereof. The manufacturing method of the SOI structure with reinforced anti-irradiation performance comprises the following steps: providing two wafers, and forming an insulation oxide layer on a surface of at least one wafer; carrying out injection of an irradiation proton, an irradiation neutron and the like on the insulation oxide layer, and introducing displacement damage in the insulation oxide layer; carrying out bonding of the two wafers through the insulation oxide layer; thinning one of the two wafers after bonding to form an SOI structure. In a process of utilizing bonding technology to prepare an SOI, through a method of injecting the proton, the neutron and the like into a buried oxide layer and introducing the displacement damage to form a composite center, anti-irradiation performance of an SOI device is raised, simultaneously, damage of a top silicon layer is avoided, and the performance of the device is not influenced.

The invention discloses a preparation method of a waterproof compressive autoclaved aerated concrete block, and belongs to the technical field of building materials. Aminated silicon dioxide and tri-n-dodecylamine modified tetratitanate are used for preparing modified tetratitanate, and the modified tetratitanate is dried in the carbon dioxide atmosphere, so that the modified tetratitanate adsorbing the carbon dioxide is obtained, then concentrated sulfuric acid is used for sulfonating a polystyrene microsphere, the sulfonated polystyrene microsphere is used for preparing a porous polystyrenemicrosphere under the action of a porogenic agent, the modified tetratitanate, the porous polystyrene microsphere and modified sodium lignin sulfonate are added into a basic material of a product together, and the waterproof compressive autoclaved aerated concrete block is obtained after stirring, mixing and curing the materials. A large-aperture pore in the inner part of the prepared waterproof compressive autoclaved aerated concrete block is relatively small, and the waterproof compressive autoclaved aerated concrete block is internally provided with a lamellar protection layer, so that thewaterproofness of the product is improved under the condition that the compressive strength of the product is effectively improved, and the significant progress is made by compared with the current product.

The invention discloses a high-unloading slot composite-incision demolition blasting method for a reinforced concrete cooling tower, and relates to a demolition blasting method for the reinforced concrete cooling tower. The demolition blasting method comprises the following steps: pre-demolishing an internal sprinkling platform and an external ladder of the reinforced concrete cooling tower to be demolished by blasting; arranging a composite blasting incision including a rectangular herringbone pillar area, a trapezoidal ring beam area, an acute triangular directional window and a high unloading slot on the lower part of the tower body, wherein the high unloading slot and the directional window are mechanically arranged so as to ensure the construction precision; drilling at the herringbone pillar and a ring beam which is locally required to be loosened by blasting (a ring beam loosening area is constructed by a mechanical method and a blasting method), filling explosive, fencing, and strengthening blasting of a millisecond delay blasting network through non-electric bidirectional multi-point excitation. By the demolition blasting method, the falling direction can be accurately controlled, the number of boreholes and the amount of the explosive can be greatly reduced, the collapsing disintegration degree and the touchdown impact state of the tower body can be regulated and controlled, and the touchdown vibration can be effectively controlled.

The invention provides a vernier index plate unit comprising a positioning pad, a fixed top cover, a swing rod, a vernier scale, an orifice disc pin, a pin spring, a pin handle, a fixing screw, a bolt, a positioning bolt, a pad spring, and a rod carrier. The vernier index plate unit is available in two operating modes when applied to a universal index head. When the vernier scale is not mounted, the positioning pad fastens the swing rod to a set position by rotating a positioning pin, and the vernier index plate unit is used in the same as a common index rocker. When the vernier scale is mounted, the vernier scale is mounted on the rod carrier first, the swing rod is loosened and can rotate freely, and meanwhile, an index disc and the vernier scale are used together for indexing according to the principle of vernier caliper, so that indexing capacity of the universal index head is greatly improved. The vernier index plate unit has the advantages of ingenious structure, simplicity in operation, stable performance, economy and the like; indexing capacity can be greatly improved without changing the universal index head.

This invention includes: thin wall steel tube, fluke top seat, piston propeller, bar and fluke in which the fluke top seat is fixedly connected with the thin wall steel tube, both ends of the bar are connected to its base seat of the piston probeller and fluke separately by flexible pins, the anchor head is linked to the fluke top seat by pins and middle of the fluke is linked with the bar, and connection holes connect the anchor chain at the back of the anchor head. Using the character of large fixed area and powerful force of fluke, this invention provides pulling resistance like anchor, in operation the back of anchor head is connected with the chain then put in anchor eyes to grout with high pressure from thin-wall steel tube to force the fluke open into the anchor eye wall to provide anchor force.

The invention discloses a simple numerically-controlled machine tool for machining blind holes. The simple numerically-controlled machine tool comprises a machine tool electrical cabinet, a machine tool spindle box, a numerical control panel, a cutting fluid box body, a hydraulic oil tank and a workbench. The machine tool spindle box is arranged at the front end of the machine tool electrical cabinet. The workbench is arranged below the machine tool spindle box. The cutting fluid box body is arranged below the workbench. The hydraulic oil tank is arranged on one side of the machine tool electrical cabinet and connected with the machine tool electrical cabinet through a hydraulic oil tube. Supporting tables are arranged on the two sides of the workbench. Delivery rollers are arranged at the upper ends of the supporting tables. Air pressure supports are arranged at the lower ends of the supporting tables. An index chuck is arranged on one side of each supporting table. According to the simple numerically-controlled machine tool for machining the blind holes, machining can be conducted as long as the height of the machine tool is adjusted simply and simple setting is conducted, a lot of time for adjustment and programming of the machine tool is saved, and the machining of perforating guns with few holes in a small batch is more convenient; moreover, the simple numerically-controlled machine tool is simple in structure and lowers production cost.

The invention discloses a method for reducing irradiation damage based on dislocation. The method mainly comprises the following steps of injecting protons, neutrons, gamma rays and other high-energyparticles for a silicon material and a device and carrying out annealing operation, so that the purpose of reducing irradiation damage due to the fact that dislocation with controllable density and controllable position serves as a composite center can be achieved. According to the invention, dislocation is introduced at the specified positions of the silicon material and the device, and dislocation density and dislocation area can be controlled. The dislocation is introduced into the silicon material and the device through irradiation of the high-energy particles to form defects, similar to acomposite center, so that the service life of the carriers is reduced. A large amount of electron-cavity generated in the irradiation process can be compounded by the composite center, so that the number of cavities captured by cavity traps is greatly reduced. Compared with the prior art, the method is advantageous in that for the introduced dislocation, high-energy particles may not affect the electric neutral characteristic of the silicon material and the device, and the irradiation damage of the silicon material and the device is also reduced.

The invention relates to a pilot-tunneling method for coal uncovering, and belongs to the technical field of mine sinking and driving engineering. The method helps to solve problems that: when an uncovered outburst coal seam has a laneway sectional area more than 10m<2> or an inclined angle from the laneway to the coal seam less than 40 DEG, safe rock pillars for working face brush expension are difficult to control, shot holes are deep, explosive consumption is large, and vibration induced protrusion is easy to happen. Safe and effective coal uncovering is realized by that: the laneway sectional area is reduced, the angle of pilot-tunneling is changed, and technologies of smooth blasting, anchor-net temporary supporting and anchor-net permanent supporting etc. are employed. The method of the invention is especially suitable for coal uncovering when the laneway sectional area is large, surrounding rocks are broken, and the inclined angle is small. Advantages are that: working places need no finishing, the pilot-tunneling is flexible for operation, so that drilling by pneumatic drills is convenient, the safe rock pillars are easy to control, and operation is simple; uncovered sectional area is small, the number of working people is small, the number of blast hole is small, the amount of explosive is small, blasting disturbance is less, gas emission amount is small, and the safety is high; pilot-tunneling sectional area is small, operation technology is simple, speed is fast, and work efficiency is high.

The invention discloses drilling equipment for a heat exchanger tube sheet. The drilling equipment comprises a machine base, a knob, handles, a dial, the tube sheet, a holding pin, a drill, a rocking handle, a cutting fluid pipe, a plunger, a cutting fluid bath, a filter screen, a rotating platform, a pressing plate, a threaded rod and a machine body; the machine base is located at the lower part of the machine body; the cutting fluid bath is formed in the machine base; the filter screen is arranged in the cutting fluid bath; the filter screen is provided with the rotating platform; the rotating platform is provided with the knob; the rotating platform is provided with the dial; the handles are respectively arranged at two ends of the dial; the dial is provided with the threaded rod; the upper end of the threaded rod is provided with the holding pin; the tube sheet is provided with the pressing plate; the drill is arranged above the pressing plate; the tail part of the drill is provided with the plunger; the right side of the plunger is provided with the cutting fluid pipe; when a circumferential upper hole is processed, only the handles need to be adjusted to enable the drill to move horizontally, and a first hole position is further determined, and the remaining holes are adjusted only by reading the dial, so that the hole alignment time is reduced, and the production efficiency of the tube sheet is increased.

A connector is described for fixing a plurality of switching assemblies on a substrate. The connector is also for making contact with the plurality of switching assemblies, which have compatible interfaces. The connector has a plurality of receptacle devices with contact elements and internal contact connections between corresponding contact elements, as a result of which, the length of the connections between the switching assemblies is reduced, signal propagation times are shortened and a higher clock rate for operating the switching assemblies is made possible.

The invention provides an underground coal mine auto-drilling apparatus and method; the underground coal mine auto-drilling apparatus comprises: a pressure pump truck; a coiled tubing having an inlet and an outlet, with the inlet of the coiled tubing connected to the pressure pump truck and the outlet of the coiled tubing extending into a raw coal working support face; a tubing rotator connected to the coiled tubing; a protective tube sleeving the coiled tubing, abutted to the raw coal working support face and connected downstream of the tubing rotator, wherein the protective tube is a cross tube, and the protective tube has an axial passage for conveying the coiled tubing and a side passage for returning pulverized coal; a rotary nozzle connected to the outlet of the coiled tubing; a pulverized coal returning line connected to the side passage of the protective tube; a gas return recycling and detection device connected to the pulverized coal return line. The underground coal mine auto-drilling method employs the underground coal mine auto-drilling apparatus. The underground coal mine auto-drilling apparatus and method provide improved gas drainage efficiency and reduced cost and ensure safety.

The invention provides a high-performance low-carbon aluminum alloy and a preparation method, and belongs to the technical field of aluminum alloy materials. The aluminum alloy comprises the following chemical components in percentage by mass: 6%-8% of Si, 3%-5% of Cu, 0.2%-0.6% of Mg, less than or equal to 0.8% of Fe, 0.3%-0.6% of Mn, 0.02%-0.04% of Ti, 0.05%-0.15% of La and the balance of Al and inevitable impurities. Through component optimization and process parameter adjustment, the yield strength of a casting reaches 400 MPa or above, the tensile strength reaches 430 MPa or above, the hardness reaches 155 HV or above, and the ductility reaches 4.0% or above. The method serves the major strategy of carbon peak reaching and carbon neutralization in China, the manufacturing process is free of pollution, the carbon emission is only 5% of that of a high-performance aluminum alloy structural part produced by electrolytic aluminum, and the bottleneck problem that regenerated aluminum alloy cannot be applied to high-end products is thoroughly solved.