59results about How to "Stop floating" patented technology

The invention relates to a preparing method for a SiC particle reinforced foam aluminum based composite, which comprises the following procedures: taking by mass among the total alloy amount 1-3% Mg, 6-8% Si and remainder Al, heating 10-20% SiC particles to melt into molten aluminum alloy, carrying out electromagnetic agitating evenly; adding 1-3% foaming agent by mass, after agitating evenly the foaming agent, keeping temperature and foaming 3-5 minutes; cooling after the molten aluminum grows steadily so as to cool and solidify the molten aluminum alloy foam, then getting SiC particle reinforced foam aluminum based composite with even hole structure and high porosity. The method adds molten aluminum alloy SiCp, which on one hand increases the viscosity of the molten alloy so as to prevent the bubbles dissolved from the foaming agent from floating upward and prolong the lives of the bubbles, on another hand, SiCp can also improve the strength of the foam aluminum. These bubbles take SiCp as a core and grow, then are cooled concurrently in all directions, this can overcome any shortcoming in solidifying and get foam aluminum of high porosity and even hole structure. By using electromagnetic agitating, the burning loss in the agitating blade can be avoided, this is useful for controlling the chemical components of the alloy.

The invention relates to materials applicable to underground engineering construction, in particular to environment-friendly shield construction single-liquid synchronous grouting slurry. The slurry comprises the following materials in percentage by weight: 55 to 70 percent of sand, 10 to 20 percent of desulphurization gypsum, 10 to 20 percent of fly ash and the balance of additive and water, wherein the additive is a water-soluble high-molecular polymer thickening agent and/or a high-performance polycarboxylic water reducing agent; the water-soluble high-molecular polymer thickening agent is 0.5 to 1.0 percent of the total weight of the desulphurization gypsum and the fly ash; and the high-performance polycarboxylic water reducing agent is 0.75 to 1.25 percent of the total weight of the desulphurization gypsum and the fly ash. Compared with the conventional single-liquid synchronous grouting, the grouting slurry has the advantages of substituting the lime powder with high energy consumption and high pollution for waste desulphurization gypsum, along with the same performance. The grouting slurry solves the problems of a large amount of land occupied by the desulphurization gypsum and serious environmental pollution, also avoids the use of the lime powder with high energy consumption and high pollution and fulfills the aims of energy conservation and environmental protection. Meanwhile, a new way is found for the application of the desulphurization gypsum.

The invention belongs to a large granular straw biogas fermentation device in the field of an energy source. The large granular straw biogas fermentation device is composed of a fermentation tank (11) and a liquid storage unit (1), wherein a feeding pipe (10) and a biogas pipe orifice (9) are arranged at the top part of the tank body; a slag discharge hole (7) is arranged at the bottom part of the tank body; a gravity pusher (6) is arranged inside the feeding pipe (10); the gravity pusher (6) seals the feeding pipe (10); a circular table slag baffle ring plate (14) is arranged at the upper part inside the tank body; the upper end of the slag baffle ring plate (14) is connected with the outlet of the feeding pipe (10); the lower end of the slag baffle ring plate (14) is connected with the inner wall of the tank body; a sieve hole is arranged on the ring plate; a liquid slag separating plate (16) is arranged at the lower part inside the tank body; the periphery is connected with the inner wall of the tank body; a bleeder tube (3) is arranged at the bottom part of the fermentation tank (11), and a sieve plate (18) or/and a porous slag frame are arranged in the liquid storage unit (1). The large granular straw biogas fermentation device provided by the invention can directly digest the large granular straw, is low in energy consumption and low in input-output ratio, and can smoothly feed and discharge.

The invention provides a construction method for resisting the uplift in the internal mold of a concrete box. The method comprises the following steps: welding the longitudinal reinforcing steel bars on the box wall of the concrete box to be cast with the main reinforcing steel bars of a pile foundation at the bottom of a foundation pit; embedding an internal mold in the foundation pit and arranging a batten or a support tube at the top of the internal mold; tensioning the longitudinal reinforcing steel bars of the box wall, which are welded with the main reinforcing steel bars of the pile foundation, and then, fixedly connecting the upper ends of the longitudinal reinforcing steel bars of the box wall with the batten or the support tube; and casting the concrete and resisting the buoyant force of the concrete applying on the bottom plate of the box mold by the reaction force generated by the welded longitudinal reinforcing steel bars of the box wall and the batten or the support tube, so that the internal mold can be pressed by the support tube to prevent the internal mold from going up. The invention is suitable for resisting the buoyant force in the internal mold of a small-size concrete box and has the characteristics of reliable buoyancy resistance and easily guaranteed construction quality; and compared with the conventional method, the invention does not need secondary transport with high labor consumption, economizes on human resources and improves the production efficiency.

The invention provides an alumina-silica drainage agent and a preparation method thereof and belongs to the field of amorphous surface fireproofing materials for steelmaking industries. According to the technical scheme, the alumina-silica drainage agent is prepared from pottery cinnabar with the granularity of 0.5-1.2mm, desert silica sand with the granularity of 0.3-0.9mm, flake graphite with the granularity smaller than or equal to 75 mu m, and an adhesive. The preparation method includes first drying the pottery cinnabar and the desert silica sand, adding the flake graphite and the adhesive, and performing stirring in a barrel type stirrer to prepare the alumina-silica drainage agent. The alumina-silica drainage agent is clean, environmentally friendly, and capable of effectively increasing a pouring rate of a product to above 98%, meanwhile substantially reducing product costs, effectively reducing discharge of exhaust gases and dust, and meeting requirements for product qualities, prices and steel liquid purity degrees in present steel industries.

The invention provides the terry sinker used for weaving terry cloth on single cylinder knitting machine. The sinker is a couple of sinkers which are composed of a higher sinker and a lower one. There two are inserted into the same tongue-and-groove. There is a blade, facing the center of syringe, which has been grinded smoothly to an arch on the top of the higher sinker, and the lower one is against. The two face-to-face blades form a semicircular concave, and as a supporting side of plush yarn, these blades cling to each other and are controlled by each sinker to move radial to form stitch and cut stitch. With this kind of sinker, knitting terry gelatin suede cover directly on the machine, it replaces the napping technology, solves the problem of depilation of gelatin suede cover and improves the quality of printed matter.

The invention relates to the technical field of prestressed anti-floating anchor rod construction, and discloses a pre-tensioned and post-anchored prestressed anti-floating anchor rod construction method. The pre-tensioned and post-anchored prestressed anti-floating anchor rod construction method comprises the following steps: 1) performing prestressed anchor rod construction; and forming a drilling hole in a soil body by construction, lowering a prestressed anchor rod to drill a hole, and pouring mud in the drilled hole after the prestressed anchor rod is lowered, wherein the prestressed anchor rod comprises an anchor head and a rod body; 2) enabling the anchor head to be positioned out of the drilled hole, and enabling the rod body to be located in the drilled hole; excavating along theperiphery of the anchor head to form a construction groove, and performing reinforced concrete construction in the construction groove to form an anchor pier; 3) tensioning and locking the prestressedanchor rod; and 4) constructing an underground structure above the soil body, and anchoring the anchor head into the underground structure. Therefore, prestressed anchor rod construction, anchor pierconstruction and underground structure construction are not interfered with one other, and construction management is facilitated; tensioning and locking are facilitated, and construction steps are simplified; and moreover, restraining force is generated on the underground structure to prevent the underground structure from floating upwards, and the underground structure is prevented from floating upwards and deforming, so that an anti-floating effect is enhanced.

The invention belongs to the field of energy sources and relates to high-concentration straw methane fermentation equipment which comprises a fermentation tank (11) and a liquid storage unit (1), wherein a feed pipe (10) and a methane pipe orifice (9) are arranged at the top of a tank body; a slag discharge port (7) is formed at the bottom of the tank body; the feed pipe (10) is internally provided with a gravity material pusher (6); a circular-table-shaped slag blocking ring plate (14) is mounted at the upper part in the tank body; the upper end of the slag blocking ring plate (14) is connected with an outlet of the feed pipe (10) and the lower end thereof is connected with an internal wall of the tank body; sieve pores are formed in the ring plate; a liquid-slag separation plate (16) is mounted at the lower part in the tank body; sieve pores are formed in the liquid-slag separation plate (16); the periphery of the liquid-slag separation plate (16) is connected with the internal wall of the tank body; a liquid discharge pipe (3) is arranged at the bottom of the fermentation tank (11); and an outlet of the liquid discharge pipe (3) corresponds to or is connected with the liquid storage unit (1). The high-concentration straw methane fermentation equipment can directly consume bulky-grain straw, is low in energy consumption, smooth in feeding and discharging, and low in input-output ratio.

The invention discloses a fiber-wrapped lightweight aggregate and a method for inhibiting floating of the lightweight aggregate. Pre-wetted lightweight aggregate and fiber are connected into a whole through a small amount of cementing material slurry, a cementing material slurry thin layer with the fiber is formed on the surface of the lightweight aggregate, and the hair-like lightweight aggregate with the fiber is prepared after coagulation and hardening. The lightweight aggregate is used as a novel coarse aggregate to prepare lightweight concrete. Therefore, the floating problem of the lightweight aggregate is effectively solved, and the homogeneity of a test piece is ensured; one end of the fiber on the surface of the lightweight aggregate is embedded and fixed in the thin layer of the cementing material coating the surface of the aggregate, and the other end of the fiber on the surface of the lightweight aggregate is embedded and fixed in concrete slurry, so that the contact area between the aggregate and the cement slurry is increased. Compared with a method of directly adding fibers, the method has the advantages that prepared concrete has larger tensile strength and larger interface bonding strength with the aggregate and cement paste, so that the lightweight aggregate is more effectively prevented from floating upwards.

The invention relates to a production method of a complete movable denture with biological adsorbability. The whole edge of a denture base support is effectively closed by virtue of a movable mucous membrane, and a temporary negative pressure is generated during swallowing and chewing, so that the up-floatation of the denture during the speaking is prevented, and the retention and stabilization ofthe denture in the functional movement process are improved. According to the production method, the problems that a finished product is poor in adsorption capacity, a mandibular arch relation is notcoordinated, the jaw relation is instable, residual alveolar crests are seriously absorbed, the range of a bearing region cannot be determined, and the appearance is not sufficiently attractive in and after the production processing process of a traditional complete denture are solved, so that the fatal disadvantages that the adsorption capacity of the common denture is insufficient, a biting jawis difficult to adjust, and the like are improved.

A roll-over safety valve (1) comprises a counterweight part (40, 140, 240, 340, 440) located in a housing (2) and a valve element (30, 130, 230, 330, 430). The counterweight part is heavier than the valve element. The valve element comprises a first surface (36, 136, 236, 336, 436) facing a first end part in an axis direction, and the counterweight part comprises a second surface (46, 146, 246, 346, 446) facing a second end part in the axis direction. The second surface is positioned to be closer to the first end part than the first surface. When the valve element is separated from a valve seat, the first surface and the second surface are engaged with each other.

The invention belongs to the field of building construction, and particularly relates to an active drainage anti-floating segment and a lining structure. A main structure of the active drainage anti-floating segment comprises a segment body, a drainage pipe, drainage holes, a grouting hole, corner blocks, a water stop strip, anti-collision strips, a curved side end surface and a rectangular side end surface; through the active drainage holes, after slurry is hardened, the excess slurry existing between the segment and surrounding rock is bled and drained out, and then grouting is carried out again through the grouting hole until the position, between the segment and the surrounding rock, is all filled with hardened concrete, the filling rate of the slurry is improved, and the phenomenon that only the upper part of the segment is filled with water due to the shrinkage of the hardened volume of the slurry is eliminated, the anti-floating ability of the segment is greatly increased, through the triangular corner blocks composed of reinforced concrete, the contact between the segment and the surrounding rock is more tight, action points of the triangle corner blocks on both sides of the segment transfer to the depth of the surrounding rock to form a stress arch, and the segment is effectively prevented from floating up.

The invention discloses light slurry for shield synchronous grouting. The light slurry comprises the following components in parts by weight: 200 to 300 parts of cement, 50 to 160 parts of light aggregate, 600 to 800 parts of fly ash, 1.0 to 1.6 parts of a water reducing agent, 10 to 16 parts of a flocculating agent, 15 to 25 parts of a thickening time control agent and 600 to 750 parts of water.Compared with the prior art, the volume weight of the light slurry for shield synchronous grouting is 1.0-1.4 kg/m<3>; the volume weight is far less than that of existing synchronous mortar, the lightslurry cannot will not quickly sink to a bottom cushion supporting pipe sheet or be taken away by the circulating slurry at the slurry discharge port below, thereby greatly reducing the loss amount after the synchronous slurry is injected, obviously improving the shield synchronous grouting effect, and effectively preventing the pipe sheets from floating upwards in the shield construction in a water-rich section. Besides, the light slurry for shield synchronous grouting is not dispersed in water, the 3d compressive strength in water can reach 0.5 MPa or above, the final setting time is shorter than 15 h, the light slurry is particularly suitable for filling building gaps between pipe sheets and surrounding rock in tunnel synchronous shield tunneling construction, and the engineering quality can be better guaranteed.

The invention provides a smoke dust inhibitor which comprises the following components in percentage by mass: 46-54% of aluminosilicate, 19-22% of a phosphoric acid compound, 13-17% of a carbonic acid compound and 13-17% of chloride. The smoke dust inhibitor is prepared by taking aluminosilicate, a phosphoric acid compound, a carbonic acid compound and chloride as raw materials, and the dosage of each component is controlled, so that iron oxide in the smoke dust can be completely decomposed, nitrogen oxide can be completely volatilized, and the floating of graphite can be prevented, thereby realizing the effective inhibition on the smoke dust. Results of the embodiment show that the smoke dust inhibitor provided by the invention has the smoke dust covering performance of 100%, the flame retardant performance of 100%, the floating prevention performance of 100% and the decomposition performance of 100%.

The invention provides an efficient and energy-saving paint-water separation device, which comprises a rapid mixing tank (1), a slow mixing tank (3) and a precipitation tank (5), wherein a stirrer (2) is arranged in the rapid mixing tank (1); the rapid mixing tank (1) is communicated with a liquid inlet pipeline; the slow mixing tank (3) has a cavity shell structure; a stirrer (4) is arranged in the slow mixing tank (3); the slow mixing tank (3) is communicated with the rapid mixing tank (1) through a middle penetration hole; the precipitation tank (5) comprises a sloping plate precipitation area (6) and a paint slag bucket (7) positioned below the sloping plate precipitation area (6); the sloping plate precipitation area (6) is completely communicated with the paint slag bucket (7); a water outlet (8) is formed in the top of the rear end of the precipitation tank (5); the precipitation tank (5) is communicated with the slow mixing tank (3); a paint slag outlet is formed in one side of the paint slag bucket (7); the tops of the rapid mixing tank (1), the slow mixing tank (3) and the precipitation tank (5) are positioned on the same horizontal plane; a chemical feeding system is unidirectionally communicated with the rapid mixing tank (1), the slow mixing tank (3) and the precipitation tank (5).