31results about How to "Avoid shelling" patented technology

The invention discloses a reinforcing structure of a 3D printing reinforced masonry shear wall. The reinforced masonry shear wall structure comprises a plurality of masonry shells which are integrally formed through 3D printing and mutually stacked, and concrete which is poured in the multiple masonry shells. Each masonry shell comprises a first shell surface and a second shell surface which are parallel to each other, and also comprises two side shell surfaces which are connected to the two sides of the first shell surface and the second shell surface. The reinforcing structure comprises a plurality of inclined supporting ribs which are connected to the position between the first shell surface and the second shell surface during 3D printing of the masonry shells, and also comprises transverse reinforcements which are tied between the two side shell surfaces during 3D printing of the masonry shells. According to the reinforcing structure of the 3D printing reinforced masonry shear wall, the reinforced masonry shells are integrally formed through a 3D printing technology, original concrete small hollow blocks are replaced, the site construction labor force is greatly reduced, construction processes are reduced, the building quality is guaranteed, and building industrialization is facilitated.

The invention discloses a connecting method and a connecting structure of a 3D printed filling wall and a structural column. The connecting method comprises the steps that a first wall part and a second wall part of the filling wall are manufactured with the 3D printing technology, wherein butt-joint grooves are formed in the ends of the first wall part and the second wall part, horizontal steel bars are anchored in the first wall part and the second wall part, and one end of each horizontal steel bar protrudes out and forms an anchoring end; the butt-joint grooves of the first wall part and the second wall part are connected in an abutting mode to form a column space, wherein the anchoring ends of the horizontal steel bars are arranged in the column space; vertical steel bars are inserted into the column space and bound with hopping rings; concrete is poured into the column space, and the structural column is formed. Compared with the prior art, the connection of the 3D printed filling wall and the structure column is achieved, the integrity and the earthquake resistance of the filling wall are improved, and the tie force is increased.

The invention discloses a manufacturing method for masonry shells in a 3D printing reinforced masonry shear wall. The method includes the following steps that a, the first layer of masonry shell is manufactured to the pre-buried elevation position of transverse reinforcements through 3D printing; b, the transverse reinforcements are arranged at the top of the first layer of masonry shell; c, the second layer of masonry shell is manufactured at the top of the first layer of masonry shell through a 3D printing technology, so that the transverse reinforcements are buried in the masonry shells; and d, the steps b and c are repeated to complete manufacturing of the masonry shells. By means of the manufacturing method for the masonry shells in the 3D printing reinforced masonry shear wall, the reinforced masonry shells are integrally formed through the 3D printing technology, original concrete small hollow blocks are replaced, the site construction labor force is greatly reduced, the construction processes are reduced, the building quality is guaranteed, and building industrialization is facilitated.

The invention provides an anti-shelling and non-combustible heat preservation system for aircraft testing, which belongs to the technical field of aircraft testing. The thermal insulation system is formed by splicing a plurality of thermal insulation storage boards, and the thermal insulation storage board includes an inner panel, an outer panel, a fastening frame for connecting the inner panel and the outer panel and forming a thermal insulation cavity, and a thermal insulation core arranged in the thermal insulation cavity. In the automatic production process, the inner panel can be placed in the lower position of the production line, which significantly improves the bonding strength between the inner panel and the thermal insulation core material. In the inner panel, the insulation core material is reinforced by reinforcing fasteners, which can further increase the bonding strength between the inner panel and the insulation core material, and avoid shelling of the insulation core material.

The invention discloses a reinforced concrete structure based on 3D printing and a structure construction method. The method comprises the following steps that a foundation bottom plate is constructed, and a connection section is reserved on the foundation bottom plate; a steel bar structure of a structural column is bound to the connection section; a first prefabricated concrete outer shell is manufactured by adopting 3D printing, and concave-convex lines are formed in the inner surface of the first prefabricated concrete outer shell; the first prefabricated concrete outer shell is arranged on the steel bar structure of the structural column in a sleeved mode; a steel bar structure of a structural beam is bound, and the steel bar structure of the structural beam is bound to the steel bar structure of the structural column; a second prefabricated concrete outer shell is manufactured by adopting 3D printing; the second prefabricated concrete outer shell is mounted on the steel bar structure of the structural beam; concrete is poured in the second prefabricated concrete outer shell, and the structural beam and the structural column are completed. The prefabricated concrete outer shells are formed integrally by adopting a 3D printing technology, the continuous concave-convex lines are formed in the inner surfaces of the prefabricated concrete outer shells, the contact surfaces between the concrete poured in the prefabricated concrete outer shells and the inner surfaces of the prefabricated concrete outer shells are enlarged, compared with a smooth inner surface, friction is increased, bonding strength is improved, and a shell disengagement phenomenon is avoided.

The invention discloses a concrete shear wall structure based on 3D printing and a construction method of the concrete shear wall structure. The construction method comprises the following steps that (a) a first layer of prefabricated concrete shell is manufactured by adopting 3D printing; (b) a first layer of tie bars and / or horizontal bars are arranged on the top of the first layer of prefabricated concrete shell; (c) a second layer of prefabricated concrete shell is manufactured on the top of the first layer of prefabricated concrete shell, and the two ends of the tie bars and / or the horizontal bars are embedded into the prefabricated concrete shells respectively; (d) a second layer of tie bars and / or horizontal bars are arranged on the top of the second layer of prefabricated concrete shell, the step (c) is repeated until the prefabricated concrete shells are completed to reach designed elevation, and concrete is poured. The tie bars are prefabricated between an inner wall faces and an outer wall faces of the prefabricated concrete shells to prevent formwork expansion, the horizontal bars of a shear wall are also embedded between the prefabricated concrete shells, construction inconvenience brought by the horizontal bars in the later mounting process is avoided, and construction is simplified.

The invention discloses a tedding and air drying device for rice. The tedding and air drying device for rice includes a walking mechanism, a suction mechanism, a device main body, a front mounting plate and a rear mounting plate. The lower ends of the front mounting plate and the rear mounting plate are each provided with the walking mechanism. The rear end of the device main body is provided witha suction mechanism. The device main body includes a barrel, an air duct, a feed inlet, a discharge outlet and an electric heating piece. The middle part of the barrel is the air duct, and the air duct is S-shaped. The inner wall of the barrel is provided with a suction mechanism. The rice under the feed inlet is inhaled into the air duct through the suction mechanism, discharged from the discharge outlet through the air duct and returned to the ground. The tedding and air drying device for rice changes the traditional way of tedding, the tedding efficiency is high, the rice is avoided from peeling, and air drying can be accelerated in the tedding process.