53results about How to "Many holes" patented technology

A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in the second direction and movement of the follower in the first direction. A bias element provides resilient damping of the movement of the follower along the first direction away from the support frame, wherein the resilient damping is provided at an extremity of movement of the follower outward from the support frame along the first direction, to urge the follower in the direction of inward movement toward the support frame. A dampening element provides resilient damping of the movement of the follower along the first direction toward the support frame, the resilient damping provided at an extremity of movement of the follower inward toward the support frame in the first direction to progressively arrest movement of the follower in the direction of inward movement toward the support frame.

A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in the second direction and movement of the follower in said first direction at a substantially constant rate during at least a selected portion of the cyclic movement corresponding to ground engagement of the cultivating tool.

A cultivator for aerating a ground surface. The cultivator has a support frame moveable relative to the ground surface and a follower first pivotally connected to the support frame by a first pair of spaced link arms. The link arms have two pairs of equidistantly spaced pivot points for linear movement of the follower in a first direction away from the support frame. A tool support member is pivotally connected to the follower by a second pair of spaced link arms. The second link arms have two pairs of equidistantly spaced pivot points for linear movement of a cultivating tool in a second direction substantially perpendicular to the first direction. A driver effects cyclic movement of the tool support member in the second direction and movement of the follower in the first direction. A bias element provides resilient damping of the movement of the follower along the first direction away from the support frame, wherein the resilient damping is provided at an extremity of movement of the follower outward from the support frame along the first direction, to urge the follower in the direction of inward movement toward the support frame. A dampening element provides resilient damping of the movement of the follower along the first direction toward the support frame, the resilient damping provided at an extremity of movement of the follower inward toward the support frame in the first direction to progressively arrest movement of the follower in the direction of inward movement toward the support frame.

A nitride semiconductor structure and a semiconductor light emitting device are revealed. The semiconductor light emitting device includes a substrate disposed with a first type doped semiconductor layer and a second type doped semiconductor layer. A light emitting layer is disposed between the first type doped semiconductor layer and the second type doped semiconductor layer. The second type doped semiconductor layer is doped with a second type dopant at a concentration larger than 5×1019 cm−3 while a thickness of the second type doped semiconductor layer is smaller than 30 nm. Thereby the semiconductor light emitting device provides a better light emitting efficiency.

The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.

A rotary cutter drum includes a cutter portion formed of a multiphase material and includes first and second substantially cylindrical, radially outwardly exposed surfaces, and a knife member formed of one piece with the exposed surfaces and arranged to axially separate the first and second surfaces from one another. The knife member protrudes by a distance in the range of 1 to 5 mm radially outwardly beyond a smallest diameter portion of the first and second exposed surfaces. The knife member includes two sides terminating at respective ones of the first and second exposed surfaces.

The invention discloses a hollow tubular carbon nitride photocatalyst and a preparation method and application thereof. The hollow tubular carbon nitride photocatalyst is prepared from urea and melamine by hydrothermal and calcination, wherein the molar ratio of urea to melamine is (1-5):1. The hollow tubular carbon nitride photocatalyst has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, high light absorption capacity, high photocatalytic activity and the like. The novel visible light photocatalyst is novel in morphology and structure and excellent in photocatalytic performance. The preparation method of the hollow tubular carbon nitride photocatalyst has the advantages that the process is simple, operation is easy, the cost is low and no secondary pollution is caused. The method is suitable for large-scale preparation and facilitates industrialized application. The photocatalyst can degrade organic pollutants, can achieve the efficient removal of the organic pollutants, and has the advantages of being simple in process, convenient to operate, low in cost, high in processing efficiency, good in removal effect and the like. The photocatalyst has good application value and prospects.

The invention discloses a method for reducing strain of roadway surrounding rock in a slope. The method comprises the following steps: drilling holes in the inner side, the upper part and the bottom of a roadway slope, calculating and confirming depths and distances of the holes by using finite element software or experience equations, and carrying out rotary drilling to take out a rock core. In the slope deformation process, rock is deformed because of extrusion of stress, the strain is transversely developed because of hole drilling, and longitudinal stress conducted to a roadway lining canbe eliminated or reduced, so that the purpose of reducing roadway deformation can be achieved. By drilling holes by using a drilling machine and taking rock cores, elastic deformation of the roadway surrounding rock can be increased, lining pressure can be reduced, and roadway necking can be reduced.

The invention discloses a method for treating heavy metals and organic pollutants by using zero-dimensional black phosphorus quantum dots / one-dimensional tubular carbon nitride composite photocatalyst. According to the method, the zero-dimensional black phosphorus quantum dots / one-dimensional tubular carbon nitride composite photocatalyst are adopted to treat heavy metals and organic pollutants, the zero-dimensional black phosphorus quantum dots / one-dimensional tubular carbon nitride composite photocatalyst comprises one-dimensional tubular carbon nitride, and the one-dimensional tubular carbon nitride is modified with zero-dimensional black phosphorus quantum dots. According to the method, heavy metals and organic pollutants are treated by adopting the zero-dimensional black phosphorus quantum dots / one-dimensional tubular carbon nitride composite photocatalyst, the heavy metals and organic pollutants are removed effectively; the method has the advantages of being simple in process, convenient to operate, low in equipment requirement, low in cost, high in treatment efficiency, good in removal effect, free of secondary pollution and the like, and has very high use value and very good application prospects.

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst, which comprises the following steps: the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and organic pollutant wastewater or bacteria solution are mixed for photocatalytic treatment to finish the treatment of the organic pollutant or bacteria, the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst is prepared by taking hollow tubular carbon nitride as a carrier and the carrier is loaded with modified carbon quantum dots, wherein the hollow tubular carbon nitride is prepared from urea and melamine in a molar ratio of 1-5:1 and melamine through hydrothermal treatment and calcination. The method has the advantages of simple process, convenient operation, simple equipment, low cost, high treatment efficiency / photocatalysis efficiency, good removal effect / sterilization effect, cleanness, no pollution and the like, and has high application value and commercial value.