32results about How to "Avoid direct erosion" patented technology

The invention relates to a wafer supporting device, which comprises a wafer holder, a focusing ring and an insulating member arranged on the wafer holder. The surface of the insulating member is provided with a first section and a second section. The second section can be aligned with the focusing ring. By adopting the insulating member with an improved structure, the wafer supporting device can avoid the damage of the focusing ring due to the fact the plasma generated in the semiconductor manufacturing process erodes the fringe of the focusing ring directly, reduce the loss of the focusing ring and the insulating member and prolong the service life. Furthermore, the invention can improve etching uniformity of a wafer in the etching process, and improve yield of the product correspondingly.

The invention discloses a construction method for an enclosure structure unit of a water-area ecological breeding pasture as well as the enclosure structure unit and application thereof. The enclosure structure unit comprises at least two concrete tubular piles which are mutually spaced and fixed in a water area, and a grating net connected between every two concrete tubular piles, wherein the construction of each concrete tubular pile is combined with a specific outer retaining wall indwelling layer or an outer retaining wall sleeve, and a concrete cast-in-place method is adopted, so that the concrete tubular pile is quickly formed. The enclosure structure unit is utilized to enclose the water area into an ecological breeding pasture which can perform water exchange with the outside. The construction method for the enclosure structure unit of the water-area ecological breeding pasture as well as the enclosure structure unit and application have the advantages that through the technology, an enclosure structure unit which is strong in wind and wave resistance and efficient and fast in construction can be processed, thereby further forming a water-area ecological breeding pasture, which is conducive to promoting development and utilization of water area resources, especially the marine resources, and economic and social development.

The invention relates to a water-jacket type reverse microcirculation guiding coring device. The coring device comprises a drill bit and a clamp spring seat, wherein the clamp spring seat is nested inthe drill bit, a through water tank is arranged on the outer side wall of the clamp spring seat, a drill bit matrix and a drill bit matrix working layer are arranged at one end of the drill bit, direct water injection nozzles and side water injection nozzles communicating with the water tank are arranged on the drill bit matrix and the drill bit matrix working layer, and direct water injection tanks and side water injection tanks are further arranged in the drill bit matrix and the drill bit matrix working layer. According to the coring device, other matching structures of a rope coring drilling tool are integrated and effectively combined, so that a fractured formation can smoothly enter an inner pipe for guiding while drilling fluid is prevented from directly eroding rock cores, the rock core clamping distance is shortened during coring, and therefore, the rock core recovery rate is increased.

The invention relates to a high-erosion-resistance screen pipe outer protective cover and a method for reducing the erosion damage risk of a screen pipe. The outer protective cover comprises an inner layer base body and an outer layer base body, wherein the inner layer base body and the outer layer base body are both provided with arc-shaped punching seams which are transversely arranged, and the arc-shaped punching seams are staggered, the arc directions are opposite. The method for reducing the erosion damage risk of the screen pipe comprises the steps that S1, the high-erosion-resistance screen pipe is provided, the side face inclined high-speed inflow erosion protection function is enhanced, and the flowing resistance of fluid passing through the outer protection cover is reduced; S2, a method for identifying the high-speed inflow position and area of the oil and gas well production interval can identify the area and length with high erosion risk in the production process; and S3, a sand control well completion design method for reducing the erosion damage risk of the screen pipe is adopted. According to the high-erosion-resistance screen pipe outer protective cover and the method, the anti-erosion capacity of the screen pipe in a high-erosion-risk area in the whole well section is improved, the erosion damage risk of the screen pipe at the bottom of the well is reduced, meanwhile, the use amount of the screen pipe of the high-erosion-resistance outer protective cover is reduced, and the sand control well completion cost is saved.

The invention discloses a wave energy power generation device and method. The wave energy power generation device comprises a swing device, a transmission device and a power generation device. The swing device is connected with the transmission device. The transmission device comprises transmission rods and pistons. The transmission rods are connected with the power generation device through the corresponding pistons. The power generation device comprises a power generation passage, magnetic bodies and electrode plates. The pistons move on the inner wall of the power generation passage. A sealing cavity is formed between the power generation passage and the pistons. The sealing cavities are internally provided with metallic fluid. The magnetic bodies are arranged on the outer side of the middle portion of the power generation passage and are magnetically matched with the metallic fluid. The electrode plates are arranged on the sidewall of the power generation passage and located between the magnetic bodies and are perpendicular to the magnetic bodies. According to the wave energy power generation device and method, the intermediate conversion link is omitted; the wave energy powergeneration device is simple in system, safe, reliable and low in maintenance cost; the problems that a transmission power generator is not matched with wave characteristics and an intermediate conversion system is low in system efficiency and poor in operation stability are solved; and the efficiency of the whole wave energy power generation device is improved.

The present invention discloses a composite submarine cable protection system convenient to detect, position and repair. The system comprises a cylindrical cover body, the cover body is internally provided with a cylindrical detection cavity of which the annular side wall is a mirror surface, the left side wall in the detection cavity is provided with a wireless charger, and the bottom wall of the detection cavity is fixedly provided with a plurality of fixing blocks which are transversely arranged. The upper side of the fixing block is connected with a supporting rod through a coil spring, a bearing block is fixedly arranged on the upper side of the supporting rod, a cable penetrating through the left end and the right end of the cover body is borne on the upper side of the supporting rod, a device body is arranged in the detection cavity, a penetrating groove penetrating left and right is formed in the device body, and the cable penetrates through the penetrating groove; and by wrapping the cable for protection, the possibility of being bitten by fishes is avoided, the possibility of cable damage is reduced, the maintenance cost of the protection shell is low, accurate positioning can be achieved after detection, and maintenance is simple.

The invention discloses a floor substrate, a floor assembly and a floor. The floor substrate comprises an upper plate, a lower plate matching the upper plate, and an elastic connecting structure arranged between the upper plate and the lower plate, wherein the upper plate, the lower plate and the elastic connecting structure are all made of metal materials. According to the floor substrate, the upper plate, the lower plate and the elastic connecting structure are arranged in a matching manner, so that the floor has the advantages of long service life, good heat-conduction effect, low operationcost and good moisture-proof effect, the service life of a wood floor is prolonged, the decoration cost is reduced, the decoration effect is improved, and the mounting is more stable.

The invention discloses a protection method for a roller surface at the environment temperature of -35 DEG C to +30 DEG C. The protection method has the following advantages that (1) the roller surface is coated with a layer of light white oil crude oil without any additive, and the situation that common alcohol and ester additives with the carbon number distributed between C12 and C16 are crystallized, separated out and bonded to the roller surface in a low-temperature environment (the temperature is lower than 20 DEG C) can be effectively avoided; and (2) the outer ring of a roller is coated with a layer of oxidation-resistant and corrosion-resistant R5231 anti-rust oil, atmospheric environment gas can be isolated, the situation that the gas directly corrodes the roller surface, and consequently rust spots are generated on the roller surface is prevented, and meanwhile the situation that the anti-rust oil makes direct contact with the roller surface, and consequently the roller surface is difficult to clean subsequently is avoided.

The invention provides a sand control sieve tube used for filling a horizontal well with gravels. The sand control sieve tube comprises a base tube and sand control assemblies, wherein the base tube and the sand control assemblies are located in the horizontal well. At least two grooves are formed in the outer wall of the base tube, and through holes communicating with an inner cavity of the base tube are formed in the bottoms of the grooves. The sand control assemblies are embedded in the grooves correspondingly. Each groove is provided with a positioning side wall and a guiding side wall opposite to the positioning side wall, and a slope which inclines outwards is arranged on each guiding side wall. Each sand control assembly is provided with a first side and a second side opposite to the first side, wherein the first side abuts against the corresponding positioning side wall, and an sand cavity which is open outwards is formed between the second side and the corresponding guiding side wall. Each sand control assembly further comprises at least two filter pieces which are arranged in the circumferential direction of the base tube in a spaced mode, wherein a gasket is arranged between the upper portions of every two adjacent filter pieces in a clamped mode, and an overflow gap is formed between every two adjacent filter pieces and located below the corresponding gasket and communicates with the corresponding through hole in an aligned mode. According to the sand control sieve tube, the sand control assemblies can be protected both in the construction process and the production process, and the situation that the overflow gaps are scoured to become large and consequentially fail is prevented.

The invention discloses a drill mast. The drill mast comprises a main mast section, and a mast top section and a mast tail section which are positioned at the two ends of the main mast section respectively, wherein a fixed pulley, a movable pulley and a chain are arranged on the mast; the drill mast further comprises a protective cover arranged outside the mast; the protective cover is detachably and fixedly connected with the mast. After application of the drill mast provided by the invention, through arrangement of the protective cover, the chain and other structures which are exposed outside the mast are covered to avoid direct erosion of wind, sand and other severe environments, so that the service lives of components can be effectively prolonged, and thus the service life of the drill mast is prolonged and the working safety and the working reliability of the drill mast are improved; meanwhile, the protective cover is detachably and fixedly connected with the mast, and when the protective effect of the protective cover declines due to environmental erosion, only the protective cover is changed conveniently, so that the cost is lowered. The invention further provides a drill comprising the drill mast.

The invention provides a novel cable connection protection device comprising a male connector and a female connector, wherein the male connector and the female connector are fixed by a fixing device,one ends of the male connector and the female connector are both provided with circular holes, through which a cable can run through; the male connector and the female connector are in a hollow structure and used for holding the cable connection parts inside. The novel cable connection protection device provided by the invention can effectively protect the cable connection parts from direct erosion of rainwater and leakage, and can prevent cables from rot due to sunlight.

The invention discloses a soil form test device, system and method under the action of seepage. The technical scheme is as follows: the device comprises a seepage destroying chamber for filling soil,a steady flow chamber is installed below the seepage destroying chamber, and a water tank is installed on one side of the seepage destroying chamber; and a plurality of movable pressurizing modules are mounted on the side surface of the seepage destroying chamber and can apply pressure to the soil body in the seepage destroying chamber. The device can be used for researching change rules of deformation parameters and seepage parameters of the excavation face under the conditions of different soil texture materials and different structure excavation faces, and is easy to use and convenient to operate.

The invention discloses a special anti-freezing device for a crude oil pressure gauge. The device comprises a pressure gauge, a mounting frame and first display glass are arranged on the pressure gauge; the bottom end of the pressure gauge is connected with a connecting pipe, a piston is arranged in the connecting pipe, the top end of the connecting pipe is filled with an anti-freezing solution, the anti-freezing solution is located on the upper side of the piston, a reset device is arranged at the bottom end of the piston, a protective shell is detachably installed on the outer side of the pressure gauge, and second display glass is arranged on the protective shell. The top end of the connecting pipe is filled with the anti-freezing solution, when the pressure gauge works, crude oil extrudes the piston to drive the anti-freezing solution to enter the spring pipe of the pressure gauge, liquid such as water is prevented from directly entering the spring pipe, the liquid such as water isprevented from freezing in the spring, and therefore the spring pipe and the pressure gauge can be prevented from being frozen.