15 results about "Galling" patented technology

The invention relates to an ecological pervious concrete revetment and a construction method thereof. The ecological permeable concrete revetment comprises a plain soil base layer with a layered tamping structure, the plain soil base layer comprises an overwater part and an underwater part, and the part, on the overwater part, of the plain soil base layer has a drainage slope; the water-permeable concrete layer covers the plain soil base layer, and the surface of the water-permeable concrete layer is provided with uniform and fine galling textures; the pervious concrete layer comprises gravel aggregate with the particle size of 5mm-15mm and a cementing material; wherein the cementing material comprises ordinary Portland cement and fly ash in a weight ratio of 17: 3, as well as a water reducing agent and an air entraining agent, and the water-cement ratio of the cementing material is 0.27-0.29; and the protective layer covers the pervious concrete layer. By means of the novel revetment structure and the construction method thereof, the problem that an existing revetment structure cannot give consideration to structural strength and water permeability at the same time is solved, and the novel revetment structure and the construction method thereof can promote water circulation and healthy development of an ecological system.

The invention relates to the technical field of coping devices, in particular to a numerical control lathe spindle taper hole coping device which comprises a base, a clamping mechanism and a movable rotating mechanism are arranged at the top end of the base, and a cleaning detection mechanism and a coping mechanism are arranged on the movable rotating mechanism; the movable rotating mechanism comprises a rotating body, the rotating body is formed by combining a conical block and a cylinder, the cleaning detection mechanism comprises square grooves formed in the positions, close to the four sides of the clamping mechanism, of the outer wall of the rotating body, cleaning holes are formed in one ends of the four square grooves in a penetrating mode, and spraying openings are formed in one sides of the inner walls of the four cleaning holes in a penetrating mode. The taper hole in the main shaft body can be cleaned, cuttings are prevented from remaining on the inner wall of the taper hole, and therefore the situation that the cuttings scrape the inner wall of the taper hole in the grinding process can be prevented, the phenomenon that fine scratches or galling is formed on the inner wall of the taper hole is avoided, meanwhile, local materials are prevented from being excessively removed, and the geometrical shape of the taper hole is prevented from being damaged.

The invention provides a production process of a prestressed middle plate of a subway station. The construction method comprises the following steps of mold acceptance check, mold cleaning, mold assembly, mold release agent brushing, pre-embedded sliding groove installation, steel reinforcement framework installation, pre-embedded wire box and tool installation, steel pipe truss placement, prestressed tendon installation, pre-tensioning, secondary tensioning, concrete pouring and vibrating, upper surface galling, maintenance, tension releasing, end mold removal and component lifting and placing. The construction method comprises the steps of mold acceptance check, mold cleaning, mold assembly, mold release agent brushing, pre-embedded sliding groove installation, steel reinforcement framework installation, pre-embedded wire box and tool installation, steel pipe truss placement, prestressed tendon installation, pre-tensioning, secondary tensioning, concrete pouring and vibrating, upper surface galling, and inspecting, identifying and warehousing. Maintenance is carried out by adopting electric heating covering, direct exposure in a strong light environment for exposure is avoided, meanwhile, under the covering effect, evaporation can be reduced, humidification equipment is arranged, the humidity is further guaranteed, meanwhile, the temperature difference between the water temperature for humidifying and watering and the component is always kept, and shrinkage and cracking caused by too large temperature difference are avoided.

This invention relates to the field of petroleum engineering equipment and advanced materials processing technology, specifically to an anti-galling toothed connection structure suitable for titanium alloy oil casing, comprising interlocking female and male threads. Through parametric design of tooth width and groove dimensions, female and male thread angles and tooth heights, the galling phenomenon caused by high temperature and friction during processing is reduced, the risk of stress concentration is lowered, sealing and connection reliability are improved, thread engagement accuracy is guaranteed, and combined with surface treatment processes, the overall sealing and connection strength is enhanced. It is suitable for extreme environments such as deep wells, ultra-deep wells and offshore oil and gas extraction.

The utility model discloses a surface treatment device for a precast concrete, which relates to the technical field of precast concrete manufacturing and comprises a traveling mechanism and a treatment mechanism. The walking mechanism comprises a walking arm and walking assemblies, the walking arm extends in the longitudinal direction, and the two walking assemblies are installed at the two ends of the walking arm in the longitudinal direction correspondingly; the treatment mechanism comprises a troweling assembly, a galling assembly and a spraying assembly which are sequentially arranged at intervals in the transverse direction, the troweling assembly comprises a troweling plate extending in the longitudinal direction, the troweling plate is installed on the walking arm, the galling assembly comprises a plurality of galling structures arranged at intervals in the longitudinal direction, each galling structure comprises a web plate and two wing plates, and the spraying assembly is installed on the walking arm; the spraying assembly is used for spraying solid particles to the multiple grooves. According to the utility model, mechanical trowelling and mechanical galling of the surface of the concrete prefabricated member can be realized, the efficiency is higher, and the trowelling and galling effects can be effectively improved.

A frame pool is disclosed including a frame assembly and a pool liner, the frame assembly including horizontal frame members and a vertical frame member coupled together via a T-shaped joint. The T-shaped joint may be constructed of plastic to facilitate attachment and detachment to the adjacent frame members and to resist galling and corrosion. The T-shaped joint may also be relatively small to improve the appearance and water containment of the frame pool.

The invention provides laminated slab machining equipment, and belongs to the technical field of building material production, the laminated slab machining equipment comprises an equipment base and an equipment rack fixed on the equipment base, and further comprises an adjustable mold mechanism, the outer side of the adjustable mold mechanism is in sliding fit with a guide column, and the lower end of the guide column is fixed on the equipment base; the vibration excitation mechanism is used for driving the adjustable mold mechanism to slowly ascend and then quickly fall by virtue of self gravity, so that the concrete poured in the adjustable mold mechanism is compacted by vibration; and the pressurizing and galling mechanism is installed on the equipment rack through a sealing telescopic cylinder, and the pressurizing and galling mechanism is used for conducting sealing and pressurizing on the adjustable mold mechanism and conducting controllable galling operation on concrete in the adjustable mold mechanism. Through the synergistic effect of gravity impact type vibration compaction and sealing pressurization controllable galling, the compactness and the surface roughness of the laminated slab concrete and the bonding performance of the laminated slab concrete and a post-pouring layer are remarkably improved, and therefore the strength and the durability of components and the reliability of the overall structure are guaranteed.

A chromium-bearing, cobalt-based alloys amenable to wrought processing has improved resistance to both chloride-induced crevice corrosion and galling. The alloy contains up to 3.545 wt. % nickel, 0.242 to 0.298 wt. % nitrogen, and may contain 22.0 to 30.0 wt. % chromium, 3.0 to 10.0 wt. % molybdenum, up to 5.0 wt. % tungsten, up to 7 wt. % iron, 0.5 to 2.0 wt. % manganese, 0.5 to 2.0 wt. % silicon, 0.02 to 0.11 wt. % carbon, 0.005 to 0.205 wt. % aluminum, and the balance is cobalt plus impurities.

Provided is a method for manufacturing a steel sheet having a sheet width of more than 1600 mm, capable of achieving both suppression of galling caused by pickup generated through contact and friction between the steel sheet and a hearth roll, and suppression of meandering of the steel sheet, during continuous annealing of a cold-rolled steel sheet.　In an in-furnace region where the steel sheet temperature in a heating step of continuous annealing is in a range of 100-400°C, the ratio [C / Wr] of the crown amount C (mm) of the hearth roll installed to the roll width Wr (mm) is set at 0.00025-0.00082, and the unit tension applied to the steel sheet is set at 0.80 kgf / mm2 to 1.35 kgf / mm2, inclusive. Even in the case of a steel plate having a quarter-elongation profile prone to galling and meandering, both suppression of the occurrence of galling and suppression of meandering can be achieved, and, contrary to conventional common technical knowledge, the effect of a significant decrease in meandering in particular can be obtained.

Provided is a substrate processing method and a substrate processing apparatus capable of suppressing uneven processing of a substrate, suppressing galling of a substrate and a gripping portion that grips the substrate, and suppressing generation of particles resulting from the galling. The substrate processing apparatus includes a holding portion that holds a substrate horizontally, a rotating portion that rotates the holding portion, and a control portion. The holding portion includes a rotating disk that is rotatable by the rotating portion, a first gripping portion that is rotatable with the rotating disk and is movable between a gripping position that grips a peripheral edge of the substrate and a releasing position that releases the substrate, and a second gripping portion that is rotatable with the rotating disk and is movable independently of the first gripping portion between the gripping position and the releasing position. The control portion alternately grips the peripheral edge of the substrate with the first gripping portion and the second gripping portion during rotation of the holding portion by the rotating portion and supply of a liquid to the substrate held by the holding portion.

The utility model discloses a concrete pavement galling and groove-pressing dual-purpose tool, which comprises a traction assembly, a galling assembly and a groove-pressing assembly, the traction assembly is connected with the galling assembly and is used for driving the galling assembly to carry out galling construction on a concrete pavement so as to form rough textures to carry out galling construction on the concrete pavement, and the groove-pressing assembly is connected with the traction assembly. The groove pressing assembly is detachably installed below the galling assembly and used for conducting groove pressing construction on the concrete pavement to form a groove. According to the galling and groove pressing dual-purpose tool, the galling and groove pressing functions of a concrete pavement are integrated on one tool, function conversion is achieved through the detachable groove pressing assembly, the types and the number of construction equipment are reduced, the input cost and the management difficulty of the construction equipment are reduced, and the tool is easy and convenient to operate and high in practicability. A constructor can easily control the moving direction and speed of the galling assembly and the groove pressing assembly, different construction environments and construction requirements are met, and the tool is flexible to use and suitable for construction of pavements with various widths.

To provide a device and a method capable of more simply preventing a galling between a low-pressure external compartment and a gland packing casing, and capable of reducing a working time and saving labor.SOLUTION: A lifting device in a low-pressure external compartment comprises: a frame body extending from one end to the other end in an axial direction of a low-pressure external compartment (upper half) and acting as a hanging balance capable of mounting on an upper part of the low-pressure external compartment (upper half); multiple lifting device lifting points provided on the frame body; and multiple lifting material fixing parts provided on the frame body. A lifting point provided on a side wall part in one end side in the axial direction of the low-pressure external compartment (upper half) and a lifting point provided on a side wall part in the other side in the axial direction of the low-pressure external compartment (upper half) are connected to the lifting material fixing part. It is configured to lift the low-pressure external compartment (upper half) by lifting using the lifting device lifting points.SELECTED DRAWING: Figure 1

The utility model relates to a prefabricated truss composite floor slab galling device for a prefabricated building, which comprises a door-shaped frame which can be arranged in a crossing manner along the short edge direction of a prefabricated table, moving components which can linearly walk are symmetrically arranged at the two bottom ends of the door-shaped frame respectively, and rectangular guide holes are vertically formed in the upper parts of the two side surfaces of the door-shaped frame in a penetrating manner; a guide plate is arranged in a horizontal gap between the two guide holes in a penetrating mode, and the two ends of the guide plate are connected with suspension supporting assemblies suspended at the tops of the corresponding guide holes in a lifting and hanging mode respectively. A rail hole is formed in the guide plate in a penetrating mode along the center line of the guide plate, a galling mechanism is transversely arranged in the rail hole in a sliding and suspending mode, and the galling mechanism is pulled to move left and right through pulling assemblies symmetrically arranged on the top face of the end of the guide plate. According to the utility model, depth difference caused by non-uniform manual force application can be avoided, linear distortion caused by manual operation is eliminated, and the width consistency of grooves is ensured; operators can complete equipment control without standing on the edge of the prefabricating table, and the hidden danger that the operators fall down is fundamentally avoided.

A chromium-containing cobalt-base alloy suitable for wrought processing has improved resistance to both chloride-induced crevice corrosion and galling. The alloy contains up to 3.545 wt.% nickel, 0.242-0.298 wt.% nitrogen, 22.0-30.0 wt.% chromium, 3.0-10.0 wt.% molybdenum, up to 5.0 wt.% tungsten, up to 7 wt.% iron, 0.5-2.0 wt.% manganese, 0.5-2.0 wt.% silicon, 0.02-0.11 wt.% carbon, and 0.005-0.205 wt.% aluminum, the balance being cobalt and impurities.

The invention provides a substrate processing method and a substrate processing apparatus capable of suppressing uneven processing of a substrate, suppressing abrasion between the substrate and a gripping part for gripping the substrate, and suppressing generation of particles caused by abrasion. The substrate processing apparatus includes: a holding portion for horizontally holding a substrate; a rotating part for rotating the holding part; and a control unit. The holding portion includes: a rotating disk that can be rotated by the rotating portion; a first grasping part which can rotate together with the rotating disk and can move between a grasping position for grasping the periphery of the substrate and a releasing position for releasing the substrate; and a second gripping part which can rotate together with the rotating disk and can move between a gripping position and a releasing position independently of the first gripping part. The control unit is capable of alternately gripping the peripheral edge of the substrate by the first gripping unit and the second gripping unit while the holding unit is rotated by the rotating unit and the liquid is supplied to the substrate held by the holding unit.