32results about How to "Avoid direct contact wear" patented technology

The invention belongs to the field of geotechnical engineering, and in particular relates to a compression-shear testing apparatus for a rock in a dry-wet cyclic process. The apparatus comprises an angle-variable compression-shear unit, and a compression machine for vertically applying load onto the angle-variable compression-shear unit; the apparatus also comprises a reservoir, water injection equipment for carrying out moisture saturation treatment on a rock sample in the angle-variable compression-shear unit, and heating equipment for carrying out hot-gas drying treatment on the rock sample in the angle-variable compression-shear unit. The angle-variable compression-shear unit is located in the reservoir, and the reservoir is communicated with the water injection equipment and the heating equipment. By adopting the compression-shear testing apparatus, the integration of rock sample dry-wet cyclic treatment and a shear test is realized, and the apparatus has the advantages of simple structure, convenient operation, low cost, wide application range and long service life; the rock samples in different states after different dry-wet cyclic times can be accurately simulated, shear test research is carried out on the rock samples, and moreover, failure load and displacement of the rock samples in the vertical direction in the shear test process can be recorded in real time.

The invention relates to the technical field of the laser welding processing and in particular to a feeding and positioning device of a laser splicing and welding line. The feeding and positioning device of the laser splicing and welding line comprises a positioning device body, a positioning base, a positioning sleeve, a pressing block, a positioning base pressing block, a permanent magnet, a sensor, a sensor lower fixing block, a sensor upper fixing block, a bolt, a spring and a jackscrew. A BALLUFU inductive Global-type sensor is selected for replacing an original elastic contact-type sensor, and mechanical collision and contact to the sensor is eliminated, so service life of the sensor is greatly improved. In addition, the spring is used so that the positioning sleeve can be guaranteedto have an elastic function, and to adapt an accident error of a welding joint length of a plate material, so an occurrence rate of misalignment defective products is reduced. Through increasing thenumber of magnets, reliability of a top support of a welding joint is enhanced. Through a design that a magnetic face is lower than a top support face, direct contact and wear of the magnets and the welding joint is avoided, so the magnets do not need to be replaced, and the welding joint does not adsorb chips of the magnets, so a phenomenon that quality of the welding joint is affected because the positioning device collides with the chips is eliminated.

The invention discloses a preparation method of anti-wear hydraulic oil, comprising the following steps: (1) evaluating the comprehensive performance of various base oils, and selecting a base oil with high comprehensive performance and reasonable price; (2) evaluating the comprehensive performance of the base oil Oil-water separability, foam characteristics, freezing point, anti-rust performance in the presence of water were measured; (3) Modification of base oil; (4) Friction performance test: On a four-ball machine, test the effect of nanoparticles and extreme pressure anti-wear agent on the The influence of hydrogenated base oil on the friction properties, and the use of optical profilometer and photoelectron spectrometer to analyze the wear scar microscopic surface morphology and the type, valence and content of elements on the wear scar surface, to study the friction mechanism of lubricating additives, and to find suitable (5) Development of multi-stage anti-wear hydraulic oil. The invention improves the comprehensive performance of the hydraulic oil by compounding a variety of functional additives and a small amount of auxiliary additives through the optimal proportioning scheme of the single factor additive.

The invention relates to an upright pile for surrounding a cultivation net. The upright pile utilizes a reinforced concrete upright column and is characterized by utilizing a combined structure consisting of a reinforced concrete upright pier, the reinforced concrete upright column, upright pile arm frames, an upright pile pulling rope and an upright pile hanging net force headrope; as to the reinforced concrete upright column, the outer diameter is 50cm, the length is 21m and the wall thickness is 10cm; anti-fouling paint for ships is painted on the outer surface of the reinforced concrete column, and an upright pier is arranged at the upper end of the reinforced concrete upright column; cylindrical nylon rods are utilized as the upright pile arm frames; a high-strength polyethylene monofilament rope passes through a PVC (polyvinyl chloride) coating canvas pipe to form the upright pile hanging net force headrope; the upright pile hanging net force headrope and the upright pile arm frames are fixed; the upright pile arm frames are arranged at intervals of 2.5m from a 2.5m-position from the top end of the reinforced concrete upright column; an ultra-high-strength rope is taken as the upright pile pulling rope for connecting the reinforced concrete upright column, the upright pile hanging net force headrope and the upright pile arm frames, all connection parts are bound sequentially, and the upright pile for surrounding the cultivation net is obtained.

The invention relates to a soft connecting method for coasts and large-scale aquaculture netting. The method is characterized by including: the antifouling ultra-high molecular weight polyethylene netting is made through warp knitting; a reinforced concrete pile is disposed on each of the left coast and the right coast; a standing reinforced concrete pile is disposed at the joint of each coast and the netting, and a vertical lacing line for hanging the netting is disposed on each standing reinforced concrete pile; one end of each of a left coast soft connecting netting horizontal lacing line and a right coast soft connecting netting horizontal lacing line is connected with the corresponding reinforced concrete pile, the other end each of a left coast soft connecting netting horizontal lacing line and a right coast soft connecting netting horizontal lacing line is fixedly tied to the corresponding standing reinforced concrete pile, and each of a left coast soft connecting netting vertical lacing line and a right coast soft connecting netting vertical lacing line is fixedly tied to the corresponding vertical lacing line, for hanging the netting, of the corresponding standing reinforced concrete pile; the left coast soft connecting netting and the right coast soft connecting netting are connected between the reinforced concrete piles; a reinforced concrete weir is poured between the standing reinforced concrete piles, and net hanging horizontal lacing lines are disposed on the surface of the weir; the edge lacing lines of the netting are fixedly tied to the vertical lacing lines, for hanging the netting, of the standing reinforced concrete piles, the lower lacing lines of the netting are fixedly tied to the net hanging horizontal lacing lines, and the floater lacing lines of the netting are fixedly tied to the standing reinforced concrete piles.

The invention discloses an anti-attachment sea cucumber pool fence, which comprises bamboo poles, plastic-coated waterproof canvas, a rhombic copper alloy mesh, strong-strength polyethylene monofilaments, ultra-high molecular weight polyethylene mesh wires and eight-strand polypropylene ropes. The anti-attachment sea cucumber pool fence is characterized in that grooves are dug in the periphery of a sea cucumber pool; plastic-coated waterproof canvas sleeves are manufactured and sleeved outside the bamboo poles; the bamboo poles sleeved with the canvas are uniformly arranged in the grooves in the periphery of the sea cucumber pool; the rhombic copper alloy mesh has a mesh side length of 1cm, a wire diameter of 1mm and a height of 4m; perpendicular lacing lines are arranged at an interval of 3m in the length direction of the rhombic copper alloy mesh, and the two mesh ends of the rhombic copper alloy mesh are connected into a ring; upper and lower horizontal steel cables are arranged on the upper and lower edges of the ring-shaped rhombic copper alloy mesh respectively; the ring-shaped rhombic copper alloy mesh is sequentially and perpendicularly assembled on the bamboo poles sleeved with the canvas on the periphery; the lower horizontal steel cable of the ring-shaped rhombic copper alloy mesh is tightly attached to the bottoms of the grooves; waste meshes are filled in the grooves in the periphery, and sandy soil is filled and compacted in the grooves; the eight-strand polypropylene ropes are tied to the top ends of the bamboo poles sleeved with the canvas, and the other ends of the eight-strand polypropylene ropes are fixedly tied to timber piles.