41results about How to "Uniform crack" patented technology

A method of sulfide corrosion prevention by which a base is protected from sulfide corrosion; and a high-temperature member which has excellent resistance to sulfide corrosion. Also provided is a method of repairing a cracked heat-transfer tube which comprises: forming a silicon oxide layer on the surface of the base; applying a titanium-containing coating fluid containing titanium metal or a titanium compound to the silicon oxide layer and thermally oxidizing the coating to form a first titanium oxide layer; forming a carbon layer on the first titanium oxide layer; and applying a titanium-containing coating fluid to the carbon layer and thermally oxidizing the coating to form a second titanium oxide layer, whereby the base is protected or repaired with the silicon oxide layer, first titanium oxide layer, carbon layer, and second titanium oxide layer.

The invention relates to a crack lacquer. According to the portion by weight, the lacquer comprises the following components that: 11 to 40 percent of thermoset acrylics, 4 to 20 percent of no-light powder, 0.5 to 26 percent of auxiliary, 2.7 to 33 percent of mixed solvent, and 5 to 15 percent of paint; the crack lacquer has natural grain, good three-dimensional effect and even cracks; the crack effect is beautiful with excellent aging resistance, water resistance and stability; the preparation technique of the crack lacquer of the invention is simple, and the spraying method of the crack lacquer is as follows: priming lacquer is firstly sprayed so as to ensure that the priming lacquer is matched with the crack lacquer; in the spraying process, the temperature difference between the bottom of the crack lacquer and a bottom layer is generated by adopting the high solidity and the high speed of the volatilization of the solvent of the crack lacquer; the priming lacquer of the crack lacquer is cracked by means of the strain of a lacquer film; the greater the color difference between the priming lacquer and the crack lacquer, the better the three-dimensional effect of the crack lacquer and the more obvious the aesthetic perception of the decoration.

The invention provides a method for manufacturing reconstituted wood. Rotary cut is carried out on the raw wood for preparing a veneer or a veneer strip, defibering is carried out on the veneer, the forming points and / or wood bunch shades or wood bunches of striation crack are formed along the natural texture of wood on the veneer, then dipping, drying and hot pressing for molding the reconstituted wood are carried out. Compared with the prior art, the method solves the problem that wood bunch is irregular; the utilizing rate of wood and production efficiency of wood bunch are increased; defibering process is simplified and energy consumption for defibering is lowered. The process ensures that the cracks on the wood bunch shades and wood bunches are even and that the dipping of wood bunchshades or wood bunches is even in the following dipping process; the product problems such as warp, deformation, jump fibre, and the like, are overcome, which are aroused by uneven defibering in manufacturing wood bunches from raw wood directly by the prior art, and the boards, the surface is very smooth and the mechanical performances such as stiffness and intensity, and the like, are higher than the raw material, are made, therefore the fast-growing forest wood with worse performances and wider source can be made into the products of reconstituted wood which can compare beauty with noble hardwood.

The invention discloses an oil painting canvas with flaws. The oil painting canvas comprises a base fabric, a priming coat and a floating coat from bottom to top, wherein the priming coat is formed by the way that priming coat coating liquid is coated on the base fabric and is dried; and the floating coat is formed by the way that floating coat coating liquid is coated and is dried after the base fabric is coated on the priming coat. With the adoption of the oil painting canvas with the flaws, and the manufacturing method thereof, after the priming coat, the floating coat and a face coating are coated on the base fabric of an oil painting, the surface of the base fabric of the oil painting has uniform and natural flaws, three-dimensional aesthetic feeling and art beauty of the oil painting created by applying the oil painting base fabric are improved, and artistic value of the oil painting is further improved.

The invention provides an environment-friendly water-based crack paint and a method of using the same, comprising a water-based crack primer and a water-based crack finish paint, and the water-based crack primer includes the following components calculated by weight percentage: water-based epoxy modified acrylic resin 20 ~30%; 0.5~1.5% neutralizer; 10~20% curing agent; 10~20% cosolvent; 0.01~0.1% leveling agent; 0.01~0.1% defoamer; 10-20% of slurry; 10-30% of water, the water-based crack finish paint includes the following components calculated by weight percentage: styrene-acrylic emulsion 60-80%; neutralizer 1-2%; water-based color paste 15-40% %; water-based cracking agent 0.01 ~ 0.1%. Compared with the related art, the invention has the advantages of high environmental protection and safety performance, good decoration effect and strong adhesion.

The invention relates to a concrete crack induction structure, and discloses a crack inducer. The crack inducer (1) is columnar, and the crack inducer (1) has an upper bottom surface (11) of the inducer and a lower bottom surface of the inducer ( 12), the upper bottom surface (11) of the inducer is an outwardly convex arc surface, and the lower bottom surface (12) of the inducer is a plane or an arc surface concave toward the upper bottom surface (11) of the inducer . The invention also discloses a crack induction structure. The crack inducer of the invention can form cracks with smaller width on the concrete pavement, and the cracks produced are relatively uniform, thereby ensuring the aesthetics of the concrete pavement and driving comfort.

The invention discloses a deformed magnesium alloy with high strength, toughness and high modulus and a preparation method thereof, which is composed of the following elements in terms of mass percentage: a% of Al, b% of one or more of La, Ce, and Pr Mixed, c% of Mn, a total of d% of RE rare earth elements Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb one or more elements, a total of e% One or several elements in Si, Ge, Ca, Li, Sn, Zn, Sb, the total amount of impurities is less than 0.2%, and the balance is Mg; a, b, c, d and e satisfy 3.5≤a≤6.0 , 0.5≤b≤4.5, 0.01≤c≤1.0, 0.01≤d≤2.5 and 0

The invention provides an NSCB sample preparation device for testing the I-mode fracture toughness of compacted clay and a use method thereof. The device includes a sample preparation container and a compactor. The sample preparation container includes a container side baffle I, a container side baffle II, a crack prefabricated spacer, a container base and a container constraint frame. The compactor includes a compacting rod, a compacting hammer, a compacting plate and a crack spacer cap. During the test, earth materials were placed in the sample preparation container. The compaction plate extends into the sample preparation container. The use method of the device includes the steps of selecting prefabricated pads for cracks, installing sample preparation containers, installing compactors, disposing soil materials, and cyclic impacting. The device can realize the preparation of straight groove semicircular bending samples, and can ensure the prefabrication of cracks without disturbing the samples, which can not only ensure the integrity of the samples but also make the cracks uniform.

The invention discloses water-based crack sandstone paint and a preparation method thereof. Water-soluble resin, nano calcium carbonate powder and titanium white are added into deionized water firstly, dispersing at high speed is carried out, then elastic emulsion, hydroxyethylcellulose, auxiliary material and residual deionized water are added, and dispersing at medium speed is carried out to obtain priming coat composition; and another container is taken, deionized water is added, firstly the auxiliary material is added under the condition of low-speed stirring, and acrylic resin, quartz sand, the nano calcium carbonate powder, the titanium white, the elastic emulsion and the hydroxyethylcellulose are continuously added under the condition of low-speed stirring, thus a top coat composition is prepared. The paint disclosed by the invention has the advantages of good stability, reusability, use convenience and the like; no cracking or irregular cracking is not caused after the paint disclosed by the invention is coated onto base material; and the paint disclosed by the invention can be well adhered onto the surface of the base material, and the paint is waterproof, durable and resistant to scrubbing.

The invention discloses a liquid-phase CO2 phase change cracking permeability-increasing grid type gas extraction method for a low-permeable coal seam. The method comprises the following steps that (1) a bottom board passage is constructed; (2) crossing drilling construction is carried out in the bottom board passage; (3) liquid CO2 phase change cracking is carried out; (4) gas of coal seams of a coal roadway strip and a recovery area is pre-drained with crossing drill holes; (5) the extraction effect of the coal roadway strip area is detected; (6) coal roadway construction is carried out; (7) hole drilling down the seam is carried out; (8) gas of the coal seam in the recovery area is pre-drained with grid type drill holes; and (9) the extraction effect of the recovery area is detected. The method can improve the quantity of drainage of gas of underground coal mine, achieve the purpose of rapidly eliminating danger of outburst for high-gas low-permeable outburst coal seams, prevent coal and gas outburst accidents and guarantee safety production of the underground coal mine.

The invention relates to the technical field of solvent-type wood paint, and especially relates to a crack paint which is easy to construct and which can provide beautiful cracks. The crack paint comprises components of, by weight: 75-90% of a crack paint mother liquor, and 10-25% of a color paste. The invention also discloses the preparation method of the crack paint. The method specifically comprises the preparation of the crack paint mother liquor and the mixing of the crack paint mother liquor and the color paste. With the formula disclosed in the invention, the crack paint which is easy to construct and which can provide beautiful cracks assists in solving defects such that over-thin cracks, non-cracking surface, non-uniform crack sizes, and paint falling after cracking of existing crack paints. With the crack paint provided by the invention, crack patterns with various colors can be formed by spraying. The crack paint is advantaged in easy-cracking wet film, uniform cracks, no color separation, no falling, beautiful patterns, and the like.

The invention provides a precast concrete component and an assembly concrete component connected with a pier head locking anchor grouting straight sleeve and a production method thereof and belongs to the technical field of construction engineering assembly concrete structures. A method of sleeve connection based on extrusion and binding force transfer is adopted and a pier head (5) and a pier head (6) are machined at two ends of steel bars respectively; the sleeve inner diameter of one end of a connecting sleeve (7) is smaller than the outer diameter of the corresponding end of steel bar pier head (6); the inner diameter of the other end of the connecting sleeve is large and the other end of the connecting sleeve is provided with threads; a blocking ring (10) is connected with the connecting sleeve, wherein the inner diameter of the blocking ring (10) is smaller than the outer diameter of the corresponding end of steel bar pier head (5); the locking anchor extrusion and binding force transfer among the steel bar pier heads, the blocking ring, the sleeve and grouting materials is utilized through the steel bars due to the sleeve grouting and accordingly the mode that the steel bar tension of the previous grouting connection precast component is mainly transferred through bonding is changed. According to the production method, the safety and the economy of the connection of the novel precast concrete component are improved.

The invention discloses a measuring device and method for the effective influence radius of a gas extraction drilled hole. The measuring device comprises a coal core gripper, a gas injection part, a gas simulation extraction part and a pressure testing part. According to the measuring device and method, operation that a coring drilled hole is constructed in an original coal seam, then coal core samples are collected and determined in a laboratory is only needed, operation that a series of gas extraction drilled holes and pressure observation drilled holes are constructed in the coal seam is not needed, the engineering quantity is greatly lowered, and the testing success rate is higher than that of a traditional measuring method; the coal quality of the coal core samples, holes and facturesare relatively even, the error brought by gas geological occurrence change to measuring can be avoided, the coal core samples are sealed in the coal core gripper, thus the problem of long exposing time is avoided, and the measuring accuracy rate is high; and tracking and monitoring of the intermediate process that does not reach the extraction time can be achieved, thus the measuring accuracy canbe ensured, and the measuring result can provide theoretical basis and data supporting for reasonable arrangement of the gas extraction drilled hole of the coal seam.