40results about How to "Increase rebound strength" patented technology

The invention belongs to the technical field of cleaning supplies, and particularly relates to a carpet retracting device. The carpet retracting device aims to solve the problems that in the long carpet retracting process in the prior art, most of carpet retracting is manually operated, and dust, sundries and the like on the surfaces of the carpets are mostly directly collected into the carpets. According to the scheme, the carpet retracting device comprises a rack, a supporting frame is fixedly installed at the top of the rack, rolling wheels are installed on the two sides of the rack throughbearings, multiple pairs of guide rollers are installed inside the rack through bearings, a top cover is installed at the top of the rack through a hasp lock and a hinge, and a cover body is fixedlyinstalled at the top of the top cover. According to the carpet retracting device, by means of resilience of a movable rod and an elastic pressing rod, in cooperation with deformation swing of an elastic loosening mechanism, dust, sundries and the like in gaps of decorative surfaces of the carpets are removed and fall off at a partition plate, then the cleaning work of the carpets is completed in the carpet retracting process, the carpets can be conveniently used next time, the carpet retracting efficiency is improved, and the labor amount of workers is reduced.

The invention discloses an improved structure of screen cloth of a mud vibrating screen for marine drilling. The improved structure comprises a screen cloth frame, the screen cloth, a guide rail, a rail protection plate and sliding blocks, wherein a plurality of fixed baffles are arranged on the screen cloth frame; springs perpendicular to the fixed baffles are mounted on the side surfaces, facing to the inlet of the screen cloth, of the fixed baffles; the springs are connected with buffering pads; mobile baffles are parallel to the fixed baffles; rotating shafts parallel to the normal direction of the screen cloth frame are arranged at the positions, positioned on the screen cloth frame, of the mobile baffles; threads are formed on the side surfaces, close to the bottom ends, of the rotating shafts; the bottom ends of the rotating shafts penetrate through the mobile baffles and are inserted into screw holes formed in the screen cloth frame; the side surfaces of the mobile baffles are in contact with the buffering pads. According to the improved structure, a liquid phase and a solid phase in drilling fluid are further separated, to enhance the screening effect and avoid loss of the recyclable liquid phase due to the fact that the liquid phase in the drilling fluid moves to an outlet of the screen cloth along with the solid phase without being separated from the solid phase during screening; therefore, the use cost of the drilling fluid is reduced, and the environment is protected.

The invention provides an aqueous curing agent and a waterborne epoxy resin composition, and an application thereof in a high-permeability waterproof reinforcing coating. The waterborne epoxy resin composition comprises, by weight, 100 parts of epoxy resin, 5-30 parts of a reactive diluent, 130-170 parts of an aqueous curing agent and 1-5 parts of a permeation enhancer. The aqueous curing agent isprepared through a reaction of phenol, polyetheramine, polyamine and formaldehyde according to a molar ratio of the phenol to the polyetheramine to the polyamine of 1:(0.8-1):(0.8-1.5), and is obtained through the following steps: performing a primary Mannich reaction on the phenol, polyetheramine and a first part of formaldehyde same to the polyetheramine in molar weight; and performing a secondary Mannich reaction on the remaining phenol, the obtained polyetheramine-phenol reaction product, the polyamine compound and a second part of formaldehyde, wherein a molar ratio of the polyamine compound to the second part of formaldehyde is 1:(1-1.2); and the molecular weight of the polyetheramine is 1000 to 2100.

The invention discloses a high-chloride silicon slurry modified ready-mixed concrete surface hardener, which can penetrate into the interior of the concrete to generate gelling substances, fill and adhere to the internal capillary pores and gaps, and inhibit concrete fission and erosion, thereby improving the concrete. Surface compactness, rebound strength, hardness and wear resistance. In addition, the present invention also discloses a preparation method of the above-mentioned high-chloride silicon slurry modified ready-mixed concrete surface hardener. The preparation method is simple, easy to implement, energy-saving and high-efficiency, and can be applied to large-scale production.

The invention discloses an oil-base drilling fluid recycling device which comprises a screen box, a vibration motor and a supporting plate. A feed port is formed in the upper portion of one end of the screen box. A solid phase discharge port is formed in the other end of the screen box. A screen frame is arranged in the screen box. A screen is arranged in the screen frame. A liquid phase discharge box communicated with the screen box is arranged below the solid phase discharge port. A liquid phase discharge port is formed in the bottom of the liquid phase discharge box. A suction pipe is connected with the side face of the liquid phase discharge box and connected with a suction fan. A plurality of spring baffle devices are arranged on the screen frame at equal intervals in the direction from the feed port to the solid phase discharge port. After drilling fluid hits the screen, the liquid phase separated from solid phase particles more easily enters the position below the screen, the screen can not be blocked, the processing amount of the drilling fluid vibration screen for drilling fluid is increased, loads on the screen are reduced, hitting impact force is increased by gas flow when the drilling fluid hits the screen, and the solid phase particles and the liquid phase are more easily separated.

The invention discloses a moving baffle based screening device of oil-based drilling fluid solid control equipment. The screening device comprises a screen frame and a screen, a guide rail and a fixed baffle are arranged on the screen frame sequentially, the longer side of the bottom surface of the fixed baffle is perpendicular to the screen frame, a slider is arranged on the guide rail, the moving baffle is mounted on the slider and parallel to the fixed baffle, a sleeve is mounted on the side face, facing the fixed baffle, of the moving baffle and is perpendicular to the moving baffle, a spring and a supporting rod are arranged in the sleeve, a spring is connected to one end, positioned in the sleeve, of the supporting rod, and the other end of the supporting rod is fixed on the fixed baffle. The moving baffle based screening device of the oil-based drilling fluid solid control equipment has the advantages that the device enables a liquid phase and a solid phase in drilling fluid to be further separated from each other, so that screening effect is strengthened, loss of the circulating liquid phase is caused by the fact that the liquid phase in the drilling fluid moves to a screen outlet along with the solid phase when not separated from the solid phase during screening is avoided, use cost of the drilling liquid is reduced and environmental protection is achieved.

The invention discloses a solid control system applied to a desert oil drilling process. The solid control system applied to the desert oil drilling process comprises a sieving box, a vibration motor, a supporting plate and a blowout prevention device. A feeding opening is formed in the position above one end of the sieving box, the other end of the sieving box is provided with a solid phase discharging opening, the sieving box is internally provided with a screen cloth frame, the screen cloth frame is internally provided with screen cloth, a liquid phase discharging box communicated with the sieving box is arranged below the solid phase discharging opening, the bottom of the liquid phase discharging box is provided with a liquid phase discharging opening, the side face of the liquid phase discharging box is connected with an exhaust column, the exhaust column is connected with an exhaust fan, and a plurality of spring baffle devices are arranged on the screen cloth frame at equal intervals in the direction from the feeding opening to the solid phase discharging opening. By means of the solid control system, after drilling fluid knocks the screen cloth, the liquid phase separated from solid phase particles enters the position below the screen cloth more easily, the screen cloth cannot be blocked, the handling capacity of a drilling fluid vibrating screen to the drilling fluid is increased, knock impulsive force generated when the drilling liquid knocks the screen cloth is increased, and the solid phase particles can be separated from the liquid phase more easily.