338results about How to "Anti-seismic" patented technology

The invention belongs to the technical field of an energy-saving building material, and relates to high-performance cast-in-place foam concrete and a preparation method thereof. The high-performance cast-in-place foam concrete is prepared from the following raw materials in parts by weight: 100-520 parts of cement, 25-180 parts of admixture, 80-320 parts of lightweight aggregate, 0.8-6.4 parts of foaming agent, 75-300 parts of water, 1.6-12 parts of additive and 2-28 parts of modifier in a mixing manner. The foam concrete prepared by the preparation method is light in weight, high in strength, excellent in waterproofness, good in heat preservation effect, free of poison, durable and the same as a building in service life, and is suitable for casting internal and external wall bodies in place, roof and ground heat preservation and foundation pit backfill of a pier pavement and the like.

The invention belongs to the architecture field, and particularly relates to an architecture structural system assembled by composite architecture boards and a construction method. The system comprises a load bearing partition plate performing functions as the beam and the column of a building and an external wall plate. Transverse frames performing the function of the beam, inner plate structure connectors and external structure connectors are arranged in a floor plate and a roof plate. The external structure connector comprises a wall bottom connector; an angle connector; a positioning connector; a connector connecting the floor plate, the external wall plate and the partition plate; a connector connecting the roof, the external wall and the gable wall; a ridge connector and so on. The invention is a plate-type total prefabricated housing construction technology, which has the comprehensive service performance of load bearing, shock absorption, hear and sound insulation, high efficiency, energy saving, durability and fire resistance, and conforms to the requirements of the green architecture. The method is capable of rapidly assembling and installing on the field and reducing the total cost of a house, as well as achieving the integration and the industrialization of the housing construction.

The present invention discloses to an external circulation dissipating type air wave refrigerating machine, belonging to the air expansion refrigeration and deep cooling low temperature technical field. The refrigerating machine mainly consists of a jet flow nozzle, a revolving drum, a main axle, an external dissipating channel opening, an air inlet, an air outlet, an external dissipating inlet, an external dissipating outlet and an external dissipating device. The refrigerating machine is characterized in that the dynamic and static relations of the nozzle and a receiving pipe are completely reversed so that a rotational double-opening receiving pipe section is aligned, synchronously or with a certain circumferential angle staggered, to the stationary jet flow nozzle and the external dissipating channel opening. Heat dissipation no longer depends on the length of the receiving pipe, and pressure waves and retention gas are led out to the external of the machine so as to dissipate and use the energy. Ice clogs of the nozzle and the external dissipating channel opening can be removed by externally adjusting a gap between the nozzle and the revolving drum, or between the external dissipating channel opening and the revolving drum. Liquid is not easy to accumulate inside the receiving pipe. The liquid-carried running efficiency of the whole machine is not reduced. The machine is small in volume and in area occupation, and eliminates the hidden danger of pipe broken caused by vibration. The refrigerating machine can more sufficiently and rationally recover the energy in the using process, and improve comprehensive benefits of air wave refrigeration.

The invention discloses a semi-submersible type multifunctional jetty, comprising one or more semi-submersible type steel box bodies mutually connected together. The lower part of each box body is provided with an anchoring locating device, and a wave wall is arranged in the longitudinal direction at the upper part of the box body. The box body is internally provided with an intermediate deck dividing the box body into an upper layer and a lower layer, wherein the upper layer is a functional box, and the lower layer is a snorkeling box. The lower layer of the box body is provided with a snorkeling device, and one end part of the box body is also provided with a shore coupling device. The invention has the advantages that the adopted semi-submersible type jetty has low manufacturing cost, short construction period, convenient construction and safe use, can effectively prevent geological disasters and avoid the damage caused by earthquakes and surge, does not change the ocean attribute and can utilize a platform on the surface of the box body as a floating dock and a hydrophilic leisure and entertainment occasion for fishing and the like.

The invention discloses light foaming concrete made by waste concrete, and the production method and application of the foaming concrete. The foaming concrete is formed by the mixing of regenerated foaming concrete aggregate formed after the smashing and screening of the waste concrete, jellous slurry formed by adding concrete, fly ash and water, and foam generated by a foaming agent. After on-spot injection, pouring or mould pouring, the foaming concrete can be used in a plurality of aspects in municipal infrastructure construction such as weak subgrade processing, high filling subgrade, road-widening subgrade, temporary subgrade, various underground pipeline foundation, narrow slot and small clearance space filling, road landslide emergency backfilling, building heat preservation, sound insulation walls and the like. The adoption of the waste concrete for making the foaming concrete has the advantages of utilizing the waste, being environment-friendly, saving energy and having low cost, and the like, and the produced foaming concrete has a plurality of good performances such as light weight, no lateral confinement compression resistance, self-compaction and vibro-free property, and the like.

The invention which provides waste brick tile / straw foam concrete and a preparation method thereof relates to a lightweight building material. The foam concrete is a porous material obtained by mixing more than 90% of a main material comprising industrial and agricultural wastes of waste brick tiles, slag, straws and the like, an additive, a foaming agent and water according to a ratio, stirring,cast-molding and maintaining. The foam concrete which has the functions of light weight, low heat conduction coefficient, heat insulation, sound insulation and fire resistance, water resistance, freezing resistance, cracking resistance, shock resistance and the like and has the advantages of low production cost, simple manufacturing process, realization of onsite casting of prefabricated products, use convenience and safety, changing of wastes into valuables, reaching of energy-saving low-carbon effects, reduction of pollution of the wastes to the environment, ecological environment protection, and nation and civilian benefiting, contributes to the creation of the saving and low carbon society in China.

The invention discloses a spiral stirrup continuously and synchronously machining machine and a machining method. The machining machine comprises a machine body seat, a spiral stirrup machining device and a monitoring device. The spiral stirrup machining device comprises a rotary workbench, a stirrup winding mechanism, a feeding mechanism and a cutting mechanism. The stirrup winding mechanism comprises a stirrup twining frame, a rolling type bending mechanism and a screw pitch axial feed mechanism. The monitoring device comprises a control device, a counting unit and a rotating speed measuring unit. The machining method comprises the first step of determining the number of winding shafts and the installation position, the second step of adjusting the positions of the winding shafts, the third step of feeding and positioning stirrup material, the fourth step of forming spiral stirrups and the fifth step of cutting spiral stirrups. The machining machine is simple in structure, continuous machining of spiral stirrups is achieved, and the production efficiency is high; meanwhile, the concrete constraining force of beam columns of buildings can be improved through the produced spiral stirrups, and therefore the seismic capacity of the buildings is improved. Practicality is high, and the machining machine and the machining method are low in carbon, environmentally friendly and efficient and save energy.

The invention discloses a fly ash / bentonite ceramsite concrete hollow insulation block and a preparation method thereof. The block is prepared from the following raw materials by weight: 100 to 150 parts of ordinary Portland cement grade 42.5, 500 to 600 parts of stone chippings, 30 to 40 parts of fly ash, 10 to 15 parts of bentonite, 5 to 10 parts of paper pulp waste liquid, 2 to 4 parts of nanometer alumina, 3 to 6 parts of light calcium carbonate, 20 to 30 parts of soluble glass, 10 to 15 parts of straw powder, 4 to 6 parts of a foaming agent, 1 to 2 parts of foots, 2 to 3 parts of a glass fiber, 0.5 to 1.5 parts of a redispersible latex powder and 150 to 210 parts of water. The boron fly ash / bentonite ceramsite concrete hollow insulation block produced in the invention has the advantages of high strength, low density, good heat insulation performance, good impact resistance, small possibility of water absorption, fire resistance, flame retardation, good weatherability, environment-friendliness, energy conservation and the like and has great market space and development prospects in the application field of building energy conservation in China.

The invention provides a construction method for paving and sticking stone materials or ceramic tiles on a wall or floor. The construction method comprises the following steps: sticking an extruded sheet on the back of a plate to be paved and stuck in advance and mounting stainless steel back bolts; sticking and hanging materials to be paved and stuck on the wall by using adhesive and hanging pieces so as to achieve a firm paving and sticking effect.

A building thermal insulation dry powder mortar belongs to a building thermal insulation material. The weight ratio of a dry powder to water is 1: 1.5. The dry powder is prepared by mixing 450 parts by mass of ordinary portland cement, 70 parts by mass of a calcined gypsum powder, 37.5 parts by mass of a redispersible emulsion powder, 15 parts by mass of fine xylem fibers, 13 parts by mass of polypropylene staple fibers, 10 parts by mass of slaked lime, 10 parts by mass of sierozem, 10 parts by mass of heavy calcium carbonate, 3 parts by mass of hydroxypropyl methyl cellulose, 364 parts by mass of a calcined expanded perlite and 17.5 parts by mass of a premixed auxiliary agent. The thermal insulation building dry powder mortar has the advantages of strong thermal insulation, strong bond with walls, high compressive strength, strong drawing force, excellent weather resistance, and environmental protection, and also has the advantages of fire resistance, cracking resistance, leakage resistance, moisture resistance, sliding resistance, earthquake resistance and the like.

The invention discloses a method for producing corrugated paper and bobbin paper by manioc waste and lees. The manioc waste and the lees are purified, ground, washed, and dehydrated respectively; impurities are removed; plant fiber is retained; the mixture of treated manioc waste and lees is mixed with waste paper stock according to the proportion of 1-7 to 3-9; and a paper-making additive is properly added to produce the corrugated paper and the bobbin paper. The method fully utilizes production wastes, namely the manioc waste and the lees to produce good and cheap corrugated paper and bobbin paper. The methd has the advantages of adequate production raw materials, low cost, simple and convenient operation, good product stability, large market potential, and high product profit, prolongs industrial chains of the manioc waste and the lees, solves the waste utilization problem of the prior manioc waste and lees, also reduces the environmental protection pressure of enterprises, improves the economical benefit of the enterprises, drives surrounding villages to be commonly prosperous, and has good social benefit and environmental protection benefit.

The invention discloses a hot swappable redundant communication device applied to railway communication, consisting of two power modules which are connected with a power bus. The two railway communication system modules are connected with power bus respectively through top-and-bottom electricity and reset controlling circuit. Two controllers are connected with each other respectively through a net mouth and a serial interface and are respectively and separately connected with the railway communication system module through a GSM-R controlling serial interface; the controller and an I / O interface extension groove are also respectively connected with a peripheral equipment interconnection bus; the I / O interface is also connected with the power bus. The hot swappable redundant communication device has the advantages of the adoption of a compact 3U CompactPCI structure, integration, hot swappable performance and redundant design and realizes the aims of high reliability and miniaturization. All modules of the device can be replaced online without power-off. Furthermore, the redundant design is adopted in crucial modules, such as a GSM-R module in the device, a controller module, a power module, etc. When any function module goes wrong, the function can be automatically switched to a normal module to continue the work, thus guaranteeing the high reliability of an engine communication and ensuring the operation safety of the engine.

The composite high-effective energy-saving heat-insulating material comprises the following components: aluminium silicate fibre, glass fibre, quick T, sepiolite, brucite, expansive pearlite, piaozhuor diatomite, bentonite, catalyst and adhesive. Its production method includes the following steps: placing the soaked aluminium silicate fibre, glass fibre and quick T into stirring machine to obtain slurry material, adding sepiolite and brucite, then adding expansive pearlite and piaozhu, adding bentonite, catalyst and adhesive, stirring them to obtain paste-like finished product, pipe blank and wall plate blank material respectively.

The invention relates to an energy-saving self-heat-insulation ceramsite building block and its manufacturing method and forming mould. The energy-saving self-heat-insulation ceramsite building block is made of, by weight, 35-50% of ceramsite, 20-29% of cement, 15-30% of coal ash, 0.5-1% of fibers, 2-5% of foaming agent, 0.3-0.5% of water reducing agent, 0.1-0.3% of waterproof agent and 0.2-0.5% of catalyst, wherein the volume of the ceramsite accounts for more than 80% of that of the whole building block. The manufacturing method of the building block includes steps of material selecting, metering, stirring, pouring, vibrating, steaming, tube drawing for demoulding, cutting forming and stacking for rest. The forming mould of the building block can be used for once forming of multiple medium-sized rectangular ceramsite building blocks, and each building block can be conveniently cut into standard small ceramsite building blocks. The energy-saving self-heat-insulation ceramsite building block is high in ceramsite content and has the advantages of light weight, warm retention, heat insulation, sound insulation, sound adsorption, low water adsorption, fire resistance, freezing resistance, quake proofing, corrosion resistance and the like.

The invention relates to an assembly-type integrated bathroom and a construction method thereof. The assembly-type integrated bathroom comprises foaming cement composite bottom plates, foaming cement composite wall plates, foaming cement composite top plates and bathroom equipment; dovetail groove type steel frame edge ribs are arranged in the plates, and each dovetail groove type steel frame edge rib is composed of an upper wing flange, a lower wing flange and a dovetail groove edge rib groove; an embedded part wedge block is arranged in each dovetail groove edge rib groove; all the plates are fixedly connected through bolts, connecting parts and the wedge blocks arranged in the dovetail groove edge rib grooves of the plates. The assembly-type integrated bathroom has the advantages that the foaming cement composite plates obtained through industrialized production are adopted, the fire resistance duration is larger than or equal to 4 hours, the sound insulation is larger than or equal to 42 decibels, raw materials forming the plates adopt inorganic materials and are non-combustible, and the comprehensive properties of energy conservation and environment protection, bearing and thermal insulation, heat insulation, fire resistance, durability, shock resistance, small mass, high strength and the like are achieved; installing operation is easy and convenient, rapidness and firmness are achieved, and environmental pollution and noise emission caused by traditional bathroom construction are reduced. The assembly-type integrated bathroom is an energy-saving and environment-protecting green building product.

The invention provides an extra-high-voltage dry hollow smoothing reactor, comprising a reactor coil, an insulating bracket, a rain-proof noise-reducing device, an arrester and an electric field shielding piece, wherein the insulating bracket is supported at the bottom of the reactor coil; the rain-proof noise-reducing device is wrapped outside the reactor coil; the arrester is connected with the reactor coil in parallel; the insulating bracket comprises a plurality of supporting insulators and at least one horizontally arranged insulator tie bar platform; each supporting insulator comprises a plurality of insulators which are connected in series through end part flanges; and the insulator tie bar platform is connected with the end part flanges of the insulators at the same level of each supporting insulator, so that the insulators at the same level have the same electric potential. The coil of the extra-high-voltage dry hollow smoothing reactor can meet the requirements of a + / - 800 kv or + / - 1,100 kv direct current power transmission project on voltage, current and impact level and can meet the requirements of an extra-high-voltage direct current power transmission project on ground insulating level and seismic intensity.

The invention belongs to the field of cables, and particularly relates to a special-shaped compression-resistant optical cable, which is composed of an outer protective layer, a belting layer, a plurality of loose bushings and a framework, wherein the belting layer is positioned outside the framework, the outer protective layer is positioned on the belting layer, the framework is composed of a framework main body, a plurality of loose bushing accommodating cavities are formed in the framework main body, a pair of arc-shaped compression-resistant components is arranged at the two ends of the opening of each loose bushing accommodating cavity, a groove is formed in each compression-resistant component, the loose bushing is composed of a loose bushing main body, a rib and a hanging component,the rib is positioned above the loose bushing main body, the hanging component is located above the rib, the two sides of the hanging component and the rib form two arc-shaped hanging grooves, an optical communication unit containing cavity is formed in the loose bushing main body, at least one optical communication unit is arranged in the optical communication unit containing cavity, the loose bushing main body is located in the loose bushing containing cavity, and the hanging component is hung on the compression-resistant component. The special-shaped compression-resistant optical cable hasthe beneficial effects of simple structure, compression resistance, shock resistance, torsion resistance, independent wiring of the loose bushing and the like.

The preparation of carbon-carbon composite material belongs to the field of composite material. Timber with special porous structure and chemical components is first pre-treated to form pre-formed template skeleton for carbon-carbon composite material, and through soaking with carbon precursor compound of carbon and subsequent densification and graphitization, the timber has its macro structure converted to carbon-carbon composite material to prepare the carbon-carbon composite material with high comprehensive performance. The carbon-carbon composite material of the present invention has high freedom in design, light weight, ablation resistance, wear resistance, high heat strength, high oxygen resistance and other excellent performance.

The invention relates to an efficient sound-absorbing ceramsite, belonging to the technical field of a building material. Aiming to solve the problems that city pollution can not be well solved, product properties are poor, the poor sound-absorbing effects are poor and the production cost is high in the prior art by mainly using the shale as ceramsite, can be solved, The invention provides the efficient sound-absorbing ceramsite, which is prepared from raw materials mainly consisting of raw materials of 60-80% of sludge, 5-20% of the shale, 5-20% of coal ash and 1.0-10% of additive. The efficient sound-absorbing ceramsite provided by the invention has the properties of wide sound-absorbing frequency band, fire resistance, good durability, freezing resistance, seismic resistance, high sound-absorbing coefficient, high porosity, light weight, high strength, heat resistance, anti-permeability and the like. The efficient sound-absorbing ceramsite further can be used for preparing a road barrier and a metro sound-absorbing material and has wide application prospect. Furthermore, the efficient sound-absorbing ceramsite provided by the invention mainly uses city sludge, so that not only can the problem of the city sludge be solved well, but also the overuse of a natural resource of the shale is reduced.

The invention relates to a preparation method of a lateral insulating layer of a high-gradient zinc oxide voltage-sensitive valve plate, and belongs to the technical field of an electrical material. The method comprises the following steps: firstly, dispersing Bi2O3, Sb2O3, SiO2, Fe2O3 into mixing solution of polyvinyl alcohol water solution and ethanol to form even size; applying the obtained size at the side of a varistor valve plate billet, and firing to obtain a high-resistance layer in which Zn2SiO4 is taken as a main ingredient, Fe is dissolved and Zn7Sb2O12 is used as a secondary ingredient at the side of the zinc oxide varistor valve plate; evenly mixing the solution obtained by dissolving powder aluminium dihydrogen phosphate into normal-temperature water with SiO2 at normal temperature, and then evenly spraying the mixture at the side of the resistor plate and carrying out constant-temperature treatment, so as to obtain an inorganic glaze layer with high bonding strength; then drying the zinc oxide varistor plate, so as to obtain white and smooth lateral insulating layer at the side of the varistor plate. By adopting the preparation method, lateral insulation of a high-voltage gradient varistor plate with heavy shock current tolerance and high insulating strength can be obtained.

The green reinforcing polymer material includes one component A and one component B. The component A consists of hydroxyl-terminated prepolymer of polyester or polyether type polyurethane 20-60 weight portions, hydroxyl-terminated polyester or polyether type polyol 5-20 weight portions, vegetable oil 5-20 weight portions, plasticizer 0-10 weight portions, stuffing 30-60 weight portions, catalyst 0.01-1 weight portion, and antioxidant 0.01-0.5 weight portion; and the component B is isocyanate as cross-linking agent in 10-20 weight portions. The present invention is used as reinforcing agent or concrete repairing agent, and has the advantages of no toxicity, no volatile organic solvent, high strength, high weather resistance, etc.

The invention discloses a partially prefabricated steel reinforced concrete mega-frame structure. The partially prefabricated steel reinforced concrete mega-frame structure adopts an idea of partiallyprefabricated assembly and partially cast-in-place and is composed of a partially prefabricated mega prefabricated steel reinforced concrete external frame and a prefabricated concrete internal frame. The partially prefabricated steel reinforced concrete mega-frame structure comprises partially prefabricated mega fabricated steel reinforced concrete beam and column prefabricated shells, cast-in-place common concrete filled in the prefabricated steel reinforced concrete beam and the column shells, steel plate sleeve and steel plate joint core area connecting devices connected with the prefabricated steel reinforced concrete beam and the column shells, prefabricated concrete beams and columns and cast-in-place high strength concrete filled in precast concrete beam and column joints. The invention further provides a construction method of the composite structure. The external frame adopts the partially prefabricated technology to improve the interface shear force transfer and connectionperformance between components and the overall continuity of the composite structure; and the internal frame improves the overall stiffness of the composite structure and reasonably divides the structural space. The combination of the external and internal frames enables the composite structure to be safe and reliable and is flexible in design.

The invention discloses a steel fiber polystyrene particle regeneration thermal insulation concrete and a preparation method thereof, and belongs to the technical field of building materials. The steel fiber polystyrene particle regeneration thermal insulation concrete is prepared from the following raw materials in parts by weight of the total weight of raw materials: 6-8% of water, 12-14% of cement, 28.5-32% of river sand, 41-48.8% of regenerative coarse aggregate, 1.0-2.5% of resin gelatine powder, 1.5-3.5% of steel fiber, 0.1-0.2% of water reducing agent and 0.6-0.8% of polystyrene particle. The invention also discloses a preparation method for the above steel fiber polystyrene particle regeneration thermal insulation concrete. The regeneration thermal insulation concrete disclosed bythe invention has the advantages of fire resistance, low density, small thermal conduction coefficient, sound isolation, shake resistance, low price, light weight, high intensity, energy saving, wasteutilization and the like.

The invention discloses an on-site mapping system for engineering mapping. The on-site mapping system comprises a pedestal, a cylinder is welded to the axis of the outer wall of the top of the pedestal, and the top end of the cylinder is movably connected with a lifting rod; a top plate is welded to the top end of the lifting rod, the end, in the cylinder, of the lifting rod is in threaded connection with a lead screw, and a driven conical gear is welded to the end, in the pedestal, of the lead screw; and the center of the outer wall of the forward face of the pedestal is movably connected with a transmission rod through a bearing, and a driving conical gear engaged with the driven conical gear is welded to the end, close to the driven conical gear, of the transmission rod. The height of amapper main body can be adjusted through the lifting rod, thus the height of the on-site mapping system is suitable for the height of a user for on-site mapping and measurement, the mapper main bodycan adjust the height of supporting feet according to different terrains, thus the measurement stability of the mapper main body is greatly improved, building engineering construction cost on-site mapping is optimized, and thus mapping becomes easier and more accurate.

The invention relates to a production method of an indoor lightweight high-strength shock-resistant fireproofing inner wall board. The inner wall board is prepared from the following raw materials: fly ash, magnesium oxide, cement, magnesium chloride, gypsum, sodium hexametaphosphate, rice hull, polyphenyl particles, staple glass fiber and water. The inner wall board is prepared by uniformly stirring the raw materials, pouring, and solidifying and forming. The inner wall board has the advantages of changing wastes into valuables, being light in weight, high in strength, fireproofing and shock-resistant and the like.

The invention provides a fabricated concrete composite wallboard structure. The fabricated concrete composite wallboard structure comprises an outer wallboard arranged towards the outside of a building, an inner wallboard arranged towards the inside of the building, and a reinforcing rib located between the outer wallboard and the inner wallboard, wherein the outer wallboard, the reinforcing rib and the inner wallboard are tied to form a whole body via a net rack; a functional compound layer is adhered to the outer surface of the outer wallboard; a part extending out of the outer wallboard, the reinforcing rib and the inner wallboard of the net rack is combined with cast-in-place concrete to form a hidden beam; a core hole used for reducing self weight of the structure is formed in the reinforcing rib along a vertical direction; a pipeline channel arranged along an axial direction of the core hole and used for laying pipelines is arranged in the core hole; and / or the core hole is also filled with core hole filling materials used for preserving heat and insulating heat; a pipeline box corresponding to the pipeline channel is pre-buried in the inner wallboard. Through type and quantity of the core hole filling materials, different heat preservation requirements in southern and northern regions are met; type and thickness of sound absorbing layers can be adjusted to meet the sound insulation requirement of the building, so that the application range of the multifunctional fabricated concrete composite wallboard is extended.

The invention discloses a courtyard type cinerary casket storage frame. The storage frame is of a frame structure and comprises a cinerary casket storage cabinet body; a top cover is fixed at the top end of the cinerary casket storage cabinet body; placement box bodies are arranged on the cinerary casket storage cabinet body; door bodies are mounted on the placement box bodies; observation windows are fixed on the surfaces of the door bodies; a fixed plate is fixed on the cinerary casket storage cabinet body; photo fixing frames are mounted on the surface of the fixed plate; a supporting base is mounted at the bottom end of the fixed plate; supporting legs are mounted at four corners of the bottom end of the supporting base; and a viscoelastic damper is arranged on each supporting leg. The courtyard type cinerary casket storage frame is firm in structure, anti-seismic, dustproof and moisture-proof, and can provide convenience for worshipping.

The invention relates to a preparation method of a welded joint of aluminum pipes. The preparation method comprises the following steps: 1, performing necking formation; 2, performing pretreatment; 3, positioning; and 4, welding, wherein before welding, the welding end of one aluminum pipe is necked to form a step diameter-reducing straight pipe shape and the welding end is subjected to surface treatment; in the welding process, the welding part is subjected to argon protection, a moveable electrode pushes the necked aluminum pipe to the aluminum pipe on a fixed electrode, and a contact resistor is used for heating after electrifying, so welding of the aluminum pipes is realized. The preparation method provided by the invention has high efficiency and is suitable for batch production. According to the produced joint of the aluminum pipes, the weld joint has a fine and smooth tissue and has the tissue characteristic of the solid-phase weld joint; and the joint has good shock resistance and good sealing property and can be applied to pipeline connection of aircrafts.

The invention provides a single-side hydraulic drive type stereoscopic frame parking stall and mainly solves problems that existing parking stalls occupy large areas and installation and operation are complicated. The single-side hydraulic drive type stereoscopic frame parking stall is characterized in that the cross section of a garage-shaped frame is in an h shape; traveling wheels are installed on lower portions of side edges and travel on the ground track; a lifting slewing device installed on a stand column frame comprises a slewing stand column, an upper slewing support and a lower slewing support, the slewing stand column is installed between the upper slewing support and the lower slewing support, the upper slewing support and the lower slewing support are fixed on an upper cross beam and a lower cross beam of the stand column frame respectively, and a hydraulic slewing driving device which drives the slewing stand column to slew is installed on one slewing support; and a lifting sliding sleeve driven by a hydraulic cylinder is sleeved on the slewing stand column, and a vehicle carrying table board is fixed at the lower end of the lifting sliding sleeve. The single-side hydraulic drive type stereoscopic frame parking stall has the advantages that by means of a frame type main body and single-side hydraulic drive, the stereoscopic frame parking stall is simple in structure.