32results about How to "Guaranteed Strength Requirements" patented technology

The invention belongs to a prestressed concrete and steel combined tower on which a self-support wind generator set can be assembled and an anchoring method of the prestressed concrete and steel combined tower. The prestressed concrete and steel combined tower comprises a fan foundation and a steel tower cylinder section above the fan foundation and further comprises a prefabricated concrete tower cylinder section and a prefabricated concrete conversion section, and the fan foundation, the prefabricated concrete tower cylinder section, the prefabricated concrete conversion section and the steel tower cylinder section are sequentially connected through prestress anchor sheaves in the sequence from bottom to top. According to the prestressed concrete and steel combined tower on which the self-support wind generator set can be assembled and the anchoring method of the prestressed concrete and steel combined tower, a tower used for the wind generator set is divided into the concrete part and the steel part which are connected through the prefabricated concrete conversion section, and concrete is in a pre-compression state through tensioning of the internal and external prestress anchor sheaves. The concrete tower cylinder section is divided into a plurality of sections according to an actual project and formed by prefabricating and splicing in the sequence of ring pieces-ring sections-segments. The prestressed concrete and steel combined tower has the advantages of being good in quality, low in manufacturing cost, convenient to maintain and the like, the construction method is simple, and the construction speed is high.

The invention relates to a phosphogypsum treating agent, a phosphogypsum treating method, a phosphogypsum filling material preparation method and a phosphogypsum filling material. The treating agent comprises the following components in percentage by mass: 27.7%-96.7% of calcined phosphate tailings, 0.3%-1% of ammonium sulfate, 3%-68% of solid waste micro powder and 0-3.5% of an alkaline activator, wherein the calcined phosphate tailings are calcined products of high-magnesium phosphate tailings. Based on the phosphogypsum treating agent, harmless treatment of phosphogypsum can be achieved, effective utilization of solid waste high-magnesium phosphate tailings can be achieved, and meanwhile the strength requirement of phosphogypsum serving as an engineering filling material is met.

The invention relates to a method for forming a composite rhBMP-2 elasticity modulus graded porous titanium alloy support rod for the femoral head and the neck. Titanium alloy powder is prepared with an electrode induction melting gas atomization method, and the integrated elasticity modulus graded porous titanium alloy support rod consisting of a head part, a body part and a tail part is prepared according to actually measured biomechanical parameters of the femoral head, the neck and a rotor, wherein the head part and the body part are prepared by sintering the titanium alloy powder and pore-forming agents through the adoption of a cold rolling method, the tail part is prepared by directly sintering the titanium alloy powder, and the porous titanium alloy support rod is immersed in a rhBMP-2/gelatin controlled release microsphere solution. The product prepared by the method can simulate the biomechanical properties of the femoral head and the neck of a human body to the utmost extent, thereby being beneficial to the stress transfer between materials and bone tissue interfaces, avoiding poor bone restoration caused by the stress shielding effect; and simultaneously, sustained-release microspheres on which bone induced growth factors (rhBMP-2) are loaded endue the materials per se with good bone conductivity.

The invention relates to a connecting joint, in particular to a split prefabricated assembly type combined tower drum connecting joint and a mounting method thereof. The split prefabricated assembly type combined tower drum connecting joint comprises an upper flange plate, a lower flange plate, prestressed steel bars, prestressed embedded parts and a shell, wherein the prestressed steel bars are formed by a plurality of reinforcing steel bars in a cage shape, the lower flange plate is arranged at the lower ends of the reinforcing steel bars, the upper flange plate is arranged at the upper endsof the reinforcing steel bars, the lower flange plate and the upper flange plate are both fixed to the shell, and the prestressed embedded parts penetrate through the shell. The problems of sudden rigidity change at the joint of a concrete tower drum section and a steel tower drum and local buckling of a connecting joint are perfected or avoided as much as possible, and meanwhile, the transportation cost can be reduced in a split mode, the construction difficulty is simplified, and the efficiency is improved.

The invention relates to the field of cooking range infrastructures, in particular to an energy-saving cooking range. The energy-saving cooking range comprises a hearth, and more than three flame guide ribs circumferentially and uniformly distributed along an internal wall of the hearth, wherein the hearth is in a cylindrical or bowl-shaped structure; a gas distributing disk and an ignition part matched with the gas distributing disk for ignition are arranged at the bottom of the hearth; the energy-saving cooking range is provided with air inlets used for allowing air to enter in the hearth and/or in a position where the gas distributing disk is matched with the hearth; the flame guide ribs extend from the bottom of the hearth to the top of the hearth sequentially; and arrangement directions of the flame guide ribs are different from a generatrix direction of the hearth. According to the energy-saving cooking range, a flow-through route of a flame can be changed by an artificially designed flame path, so that a purpose of prolonging the attachment time of the flame on the internal wall of the hearth can be achieved; an effect of improving heat exchange is further exerted; the energy-saving cooking range is simple in structure and convenient to realize; and the low manufacturing cost and the low use cost of the energy-saving cooking range can be ensured effectively.

The invention relates to a preparation method of a light bicycle frame with high strength and low density. The method comprises the following steps: (1) preparing a magnesium alloy ingot; (2) annealing after machining of the magnesium alloy ingot; (3) carrying out forward extrusion preparation; (4) extruding the magnesium alloy ingot obtained in step (3) to obtain a profile and dragging; (5) carrying out backward extrusion preparation; (6) extruding the magnesium alloy ingot obtained in step (5) to obtain a profile and dragging; (7) cutting the profiles obtained in step (4) and step (6); (8) machining a product obtained in step (7), then quenching, carrying out aging treatment, and then naturally cooling to room temperature to obtain a pipe; (9) carrying out treatment and heat preservation on the pipe obtained in step (8); and (10) machining the pipe obtained in step (9) after welding, heat treatment and cooling to obtain the product of the bicycle frame. The preparation method is simple in process and easy to implement, and the obtained product can solve the problem of compatibility of strength and weight of the bicycle frame to the greatest extent.

The invention provides a portable folding shoe rack which belongs to furniture. The invention solves the problem of storing shoes in a small space, aiming at a small-sized house, a collective dormitory, a small-sized recreational public place. The invention has good tensile and compressive performance, according to the different use requirements of the user, through simple stretching, the cross tensile and compressive mechanism originally compressed and placed can be extended, and the transverse volume of the product can be changed. Through simple sliding, the cross tension and compression mechanism of each layer can slide laterally, so that the shoe rack with the same width can be changed into a stepped shoe rack, so as to accommodate the shoe placement of different sizes and heights; theinvention adopts modular design and can be freely combined and prolonged according to requirements. The invention is provided with a pulley which can be easily moved; at that same time, the inventioncan also be folded and stored when idle, and can be fit for a plurality of places.

The invention discloses a design and construction method of a fabricated house building. The method comprises the following steps of 1, drawing an overall building wall graph of a fabricated house; 2, performing pouring construction of a house foundation; 3, processing and preparing house walls; 4, processing and preparing an assembled roof; 5, assembling the house walls and the house foundation; 6, firmly integrating the surrounding house walls; and 7, assembling the assembled roof and the house walls. Meanwhile, a corresponding fabricated house main body structure is formed. According to the invention, the construction of the house building is achieved only through the house foundation, the house walls and the fabricated roof, so that drawing of a construction drawing is facilitated and the working efficiency of designers is improved; meanwhile the prefabricated house building and the construction method thereof have the effects of convenience in installation, high efficiency and low cost; and the overall structural strength is high, and assembling and disassembling are convenient.

The invention provides a treatment method of a 3D material. According to the method, a styrene-butadiene copolymer is adopted as a 3D printing material, and is subjected to shearing, swelling, softening, grinding, air-drying granulation and cooling treatment, so that the strength requirement of a printed finished product can be met, and the forming speed of the printed finished product can be increased.

The invention discloses a method for reducing the difficulty of ultrasonic welding of engineering plastics. The method is characterized by comprising the following steps that S1, before ultrasonic welding of the engineering plastics, an auxiliary welding reagent is coated on the welding surface of the engineering plastics in advance, and the auxiliary welding reagent comprises an activating agent.According to the method, the welding surface of the engineering plastic is treated by selecting the auxiliary welding reagent, so that the surface of the engineering plastic is subjected to ultrasonic welding after being subjected to pre-dissolving and activating treatment, and then only low-power ultrasonic welding equipment is needed for wave generation welding, so that the welding difficulty can be reduced, the strength and function requirements of a welding assembly are guaranteed, the power requirement of welding equipment is lowered, cost is saved, and meanwhile unification and standardization of the equipment are promoted.

The invention discloses a connection node and method for a reinforced concrete conversion column wrapping a reinforced concrete conversion beam. A beam box is fixed to the top of the reinforced concrete conversion column. Two through holes I penetrating through the beam box in the horizontal direction are formed in the beam box and communicate with each other through a through hole II. The reinforced concrete conversion beam comprises two shaped steel parts I which are matched with the two through holes I correspondingly. The two shaped steel parts are fixedly connected through a second shapedsteel part II. A plurality of channels are arranged in the shaped steel part II, and a plurality of reinforcing steel bars penetrate through each channel. Concrete is poured between the two shaped steel parts I, on two sides of the shaped steel part II and in the channels in the shaped steel part II. The reinforced concrete conversion beam further comprises a bolt, wherein the bolt is used for fixing the beam box and the shaped steel parts I. The connection node and method are used for solving the problems that in a reinforced concrete combination in the prior art, an enveloping structure ofa node position is complex and requires more consumables, and risks may happen to the end portion of a reinforced concrete beam or column in installation processes, and realizes the purposes of reducing the size of a reinforced concrete node and avoiding the risks of damage in connection processes.

The invention relates to an air-conditioner air supply system and an air-conditioner. The air-conditioner air supply system comprises a plurality of air supply units. Each air supply unit is provided with an own air supply fan, an air-supply air channel and an air-conditioner air supply opening. The directions of all the air-conditioner air supply openings are different so as to meet air supply requirements of different regions. According to the air-conditioner air supply system, multi-direction air blowing can be achieved, the requirements for the air supply range and strength can be met, all spaces in a room can be fast refrigerated or heated in the operating process of the air-conditioner, and the temperature in the room can be more uniform.

The invention discloses a waterproofing agent for a thermal insulation cement mortar. The waterproofing agent is potassium n-arachidate. The invention also discloses the thermal insulation cement mortar. The thermal insulation cement mortar comprises Portland cement, a thermal insulation material and the waterproofing agent, the water proofing agent is the potassium n-arachidate, and the saturatedwater absorptivity of the thermal insulation cement mortar is equal to or less than 1.2%. The waterproofing agent is applied to the cement mortar to make the cement mortar have the lightweight, thermal-insulating and waterproof performances, and cooperates with the heat insulation material to ensure the waterproof performance and ensure the strength demand of the cement mortar.