41results about How to "No risk of cracking" patented technology

The invention discloses a steel-concrete combined structure pipeline with a spiral reinforcing ring and a manufacturing method of the steel-concrete combined structure pipeline. The steel-concrete combined structure pipeline comprises a pipe body. The surface of the pipe body extends outwards to form a protruding rib spirally arranged on the outer wall of the pipe body. A groove is formed by the protruding rib and the pipe body and provided with a blocking steel belt for blocking a groove opening of the groove. The hollow reinforcing ring is formed between the protruding rib and the blocking steel belt and filled with concrete. The steel-concrete combined structure pipeline has the advantages that by additionally arranging the spiral reinforcing ring integrally formed together with the pipe body, the annular strength of the pipeline is enhanced; by filling the reinforcing ring with concrete, the pressure resistant strength of the pipe body is further improved; by means of the pipeline, the purpose of using large-size steel structure products in underground common pipeline projects, underground comprehensive pipe galleries and underground traffic roads and metros is achieved; meanwhile, the method is easy to operate, easy and convenient to construct and capable of shortening construction period and reducing cost.

Additional charge of a solid raw material 13 in the shapes of granules/lumps, low in raw material cost, and with no risk of cracking, is performed into a molten raw material 14 in a crucible in a static manner without solidifying a surface of the molten raw material 14 in the crucible 3. A bottom of a cylindrical raw material vessel 10 made of a material non-meltable when being in contact with the molten raw material 14 in the crucible 3 is closed with a bottom cover 11 made of a material meltable and removable when being in contact with the molten raw material 14 in the crucible 3. The raw material vessel 10 in a state of being filled with the solid raw material 13 in the shapes of granules/lumps is hung down above the crucible 3 to immerse the lower portion thereof into the molten raw material 14 in the crucible 3. The bottom cover 11 is molten and removed by putting the bottom cover 11 into contact with the molten raw material 14 in the crucible 3 to thereby charge the solid raw material 13 in the raw material vessel 10 into the molten raw material 14 in the crucible 3.

The invention provides a building decoration paster and a manufacturing method thereof. The building decoration paster comprises a reinforced mesh layer, a waterproof layer is arranged on the reinforced mesh layer, a moulding coating layer is arranged on the waterproof layer, and a top facing layer is arranged on the moulding coating layer. The invention further comprises the manufacturing method of the building decoration paster. The building decoration paster can be obtained through industrialized prefabrication production, moulding is conducted through moulds, and the expressive force of moulding and color matching is strong; the building decoration paster is used for replacing painting of building coating on the wall surface on site, on-site construction is easy, and influence of weather is small; influence of on-site construction conditions does not exist, when the construction is conducted, protection is not needed, and adjacent parts which do not need to be painted are not polluted; due to the fact that a workshop is formed through maintenance, noxious odour is not emitted on site, and the workshop can be put in use immediately.

The present invention is a method for manufacturing a solid oxide fuel cell apparatus for generating electricity by supplying fuel and oxidant gas to fuel cells housed in a fuel cell module, comprising: an adhesive application step for applying ceramic adhesive to the joint portions of constituent members so that the flow path carrying fuel or oxidant gas inside the fuel cell module are formed in an airtight manner; a workable hardening step for hardening the applied ceramic adhesive to a state capable of implementing the next manufacturing process; and a solvent elimination and hardening step wherein, after multiple repetitions of the adhesive application step and the workable hardening step, ceramic adhesive hardened in the workable hardening steps is dried to a state capable of withstanding temperatures during electrical generation.

The invention discloses a double-surface coating process of cylindrical screen cloth. The double-surface coating process comprises the following steps of subjecting integrally molded cylindrical screen cloth to heat setting treatment for twice in sequence, then subjecting the cylindrical screen cloth to gum dipping and gum rolling treatment, and finally carrying out oven-drying treatment on the cylindrical screen cloth. By using the double-surface coating process, the convenience is provided for the subsequent production of a product using cylindrical coating screen cloth; the production efficiency is greatly improved; the cost of the product is decreased; the cylindrical screen cloth is subjected to heat setting at different temperatures for twice in sequence; internal stress generated by a textile fiber in a stretching process is eliminated by utilizing different heat power; the slackness of a macromolecule is enabled to basically reach the most balance; therefore, the cylindrical screen cloth is enabled to be more stable in structure and be good in toughness; the cylindrical coating screen cloth is integrally cylindrical, and compared with a cylindrical product which is sewed by common open-width screen cloth, as subsequent sewing processing does not exist, has no risk that a sewed position is easily cracked; the quality of the product is improved; meanwhile, the appearance is also more attractive.

The invention discloses an insulation structure suitable for a dry-type transformer with the voltage grade of 35 kV or above. A first cylindrical insulation device is arranged between a low-voltage winding and a high-voltage winding of the dry-type transformer, and a second annular cake-shaped second insulation device is also arranged at the end of the high-voltage winding. Shielding layers are arranged on the portions, close to the inner wall and the outer wall, of the first insulation device respectively, and the shielding layers are connected with the middle of the low-voltage winding and the middle of the high-voltage winding respectively to form equipotential. Shielding layers are arranged on the portions, close to the upper wall and the lower wall, of the second insulation device respectively, and the shielding layers are connected with the high-voltage winding and an iron yoke of an iron core respectively to form equipotential. Therefore, the second insulation device becomes a main bearing unit of the voltage at the end of the high-voltage winding. The insulation structure solves the problems that according to the structure of a high-voltage dry-type transformer, the main air channel distance is large, insulation is not reliable due to the fact that air serves as a main insulation medium, and cracking is likely to occur because the thickness of a resin layer of a windingis too large, and has the advantages of being good in practicability and reliability and capable of reducing the cost.

A grey gold alloy which is nickel-free, cobalt-free, iron-free, silver-free, zirconium-free, niobium-free, chromium-free, indium-free, gallium-free and manganese-free and includes, expressed in weight percent, from 75.0 to 76.5% of Au, from 15 to 23% of Pd, from 1 to 7% of Cu, and from 0 to 5% of at least one of the alloying elements Ir, Ru, B and Re, the respective percentages of all the elements of the alloy adding up to 100%.

A grey gold alloy which is nickel-free, cobalt-free, iron-free, silver-free, copper-free, zirconium-free, niobium-free, chromium-free and manganese-free, including, expressed in weight percent, from 75.0 to 76.5% of Au, from 15 to 23% of Pd, from 0.5 to 5% of Rh, from 0 to 7% of Pt, and from 0 to 5% of at least one of the alloying elements Ir, Ru, Ti, In, Ga, B and Re, the respective percentages of all the alloying elements adding up to 100%.

The invention discloses a cover plate mounting structure of a condenser. The cover plate mounting structure comprises a back drum, wherein a condenser cavity is formed in the back drum, and comprises a condenser cavity bottom wall, a plurality of condenser cavity side walls and a condenser cover plate positioned above the condenser cavity; a plurality of cover plate mounting parts are arranged at the periphery of the condenser cover plate; at least one of the condenser cavity side walls is provided with grooves parallel to the condenser cavity bottom wall; and the corresponding cover plate mounting parts are fixedly inserted in the grooves. The cover plate mounting structure of the condenser has the advantages of simple structure, simple installation and good positioning effect; and after the condenser cover plate is inserted, the high-frequency vibration stress of the back drum is absorbed by the inserted part, so that the stress concentration generated by such rigid fixed connection modes as screws is not caused, and the cracking risk of the condenser cover plate is not occurred.

The invention relates to a motor commutator processing method. The commutator processing method sequentially includes the steps: processing a commutator bar provided with an insertion portion; adopting a support with an inner round hole, and forming a component for arranging the commutator bar on the side wall of the inner round hole; arranging the commutator bar on the support to enable the component and the commutator bar to be fixedly matched so that a composite part is obtained; placing the composite part into a corresponding mould so that the composite part forms an insulating base body by injection molding; performing heat treatment for a formed blank; and finishing so that a finished product is obtained. The commutator processing method has the advantages of lower commutator processing cost, fewer commutator processing procedures and the like.

The rotogravure cylinder comprising a rotary gravure base and thereon a copper engraving layer is refurbished to contain a zinc layer between a gravure base and a layer package suitable for engraving and printing. This layer package for instance comprises a metallic support layer, a copper engraving layer and suitably a protection layer. Deposition of the zinc layer may be tuned for thickness variation, in combination with deposition of the layer package in a fixed thickness.

The invention provides a low-temperature tank container. The low-temperature tank container comprises a frame and a tank body horizontally arranged in the frame. The tank body is used for storing low-temperature liquid. The low-temperature tank container further comprises a connecting pipe, a gasification heat exchange pipe and a discharge pipeline system; the connecting pipe penetrates through the tank body and extends into the tank body so as to communicate with the gas phase space of the tank body; the gasification heat exchange pipe is fixedly arranged on the tank body; the gasification heat exchange pipe extends in the axial direction of the tank body and does not exceed the outer side of the frame; an inlet and an outlet are formed in the two ends, in the axial direction, of the gasification heat exchange pipe correspondingly, and the inlet is connected and communicates with the end, exposed out of the tank body, of the connecting pipe; and the discharge pipeline system is connected and communicates with the outlet of the gasification heat exchange pipe. The gasification heat exchange pipe is located in the atmospheric environment, low-temperature media flowing through the interior of the pipe can participate in heat exchange with the outside atmosphere, then absorb heat and are gasified into gas, the gas is discharged through the discharge pipeline system, and the temperature of the gas is relatively high so that the risk of frost cracking cannot be generated to adjacent containers and ships.

The invention provides a zirconium oxide oxygen analyzer heating furnace. The zirconium oxide oxygen analyzer heating furnace comprises a furnace core tube, a first end plate, a second end plate and aconnecting rod piece, wherein a heating wire is arranged in the furnace core tube and is used for heating a zirconium oxide oxygen sensitive element positioned in an inner cavity of the furnace coretube; the first end plate is used for supporting a first end part of the furnace core tube; the second end plate is used for supporting a second end part of the furnace core tube; the connecting rod piece is used for fastening the first end plate and the second end plate together, so that the furnace core tube is clamped between the first end plate and the second end plate. A heating cavity of theheating wire of the furnace core tube provided with the heating wire is filled with a filling material, the first end part and the second end part of the furnace core tube are sealed through a sealing material, the filling material and the sealing material are all prepared by mixing a liquid material and a solid material, the liquid material comprises a water-based high-temperature insulating coating capable of resisting high temperature of 1250 DEG C or above for a long time, and the solid material comprises sericite powder. The adopted filling material and sealing material have long-time high-temperature stability, the chemical and physical changes are not easy to occur, and the service life of the heating furnace is prolonged.

The invention discloses a bimetal spiral steel pipe and a manufacturing method thereof. The steel pipe comprises a pipe body, wherein the pipe body surface extends outwards to form a convex rib which is spirally arranged around the outer wall of the pipe body; the convex rib forms a groove with the pipe body surface and is provided with an auxiliary inner steel band capable of covering the groove notch; and a hollow cavity is formed between the groove and auxiliary inner steel band, and is filled with concrete. The convex rib on the outer wall of the pipe body and the pipe body are integrally formed without any welding seam, and thus, can resist the dynamic load fatigue when bearing the dynamic load. The pipe body inner wall is provided with the auxiliary inner steel band made of a specific metal material, thereby enhancing the corrosion resistance and wear resistance of the steel pipe, avoiding the fluid pollution, reducing the thickness of the steel pipe main body and lowering the material cost. The pipe can be used in the occasions for delivering water or other special media, such as supply or discharge of water, high-corrosivity media, media with higher requirements for purity, high-temperature media and the like, and greatly lowers the manufacturing cost.

The invention discloses a bridge deck construction method, a bridge deck and a bridge, and relates to the field of design and construction of composite structure bridges. The bridge deck is a UHPC-NC bridge deck slab provided with two UHPC sections and one NC section, and the NC section is located between the two UHPC sections. In the manufacturing process of the UHPC-NC bridge deck slab, UHPC and NC are poured synchronously, so that the boundary of the two materials is properly fused and has no cracking risk, the problem that the UHPC-NC bridge deck slab is prone to cracking can be solved, the overall comfort of a bridge is improved, and the service life of the bridge is prolonged. In addition, the UHPC sections are located at the two ends of the UHPC-NC bridge deck slab, due to the fact that the strength of the UHPC sections is high, the problem of retraction of the prestressed tendons can be solved, and therefore the overall structural stability of the UHPC-NC bridge deck slab is guaranteed.

The invention discloses a strengthening method for a bimetal cylinder body spline of a hydraulic plunger pump, relates to a machining method of the bimetal cylinder body spline of the hydraulic plunger pump, and discloses the strengthening method for the bimetal cylinder body spline of the hydraulic plunger pump. Strengthening treatment is performed, specifically, when a cylinder body blank is slowly cooled to 850 DEG C, quenching liquid is adopted for rapid cooling, after the temperature of the cylinder body blank is lower than 200 DEG C, the cylinder body blank stays in a cooling area for a period of time; and tempering treatment and discharging are performed, specifically, different tempering temperatures are selected according to the hardness requirement of a part for tempering, and discharging is performed after heat preservation is performed for a certain time. After a spline of the cylinder body is subjected to strengthening treatment, the subsequent nitriding treatment or medium-high frequency treatment procedure of the cylinder body can be replaced, the machining period of a cylinder body finished product is shortened, and procedures are reduced. The spline is pulled after the spline area of the cylinder body is subjected to strengthening treatment, so that the problems of spline deformation and spline cracking in the nitriding or medium-high frequency process are solved. In addition, after the spline area of the cylinder body is subjected to strengthening treatment, good comprehensive performance is achieved, and better impact resistance is achieved.