54results about How to "Not collapse" patented technology

The invention provides an additive composition used for a high-ductility fiber-enhanced cement based composite material. The additive composition comprises, by weight percentage, 20-85% of a rheological adjusting component, 2-30% of a setting and hardening adjusting component, 1-20% of an interlayer bonding strength adjusting component, 4-40% of a volume stabilizer, and 1-10% of a water reducer. The invention further provides a high-ductility fiber-enhanced cement based composite material based on the additive composition. Through optimal design of the additive composition and aggregate, the workability and the setting and hardening speed of a material is adjusted, and the printability, constructability, and the interlayer bonding strength of the high-ductility fiber-enhanced cement based composite material in 3D printing are improved. Compared with a 3D printing building material in the prior art, the composite material shows excellent whole performance. A component made from the composite material can meet the ductility of structural requirements without steel bars, thereby solving the problem that a component made from a 3D printing building material in the prior art is finally broken in a brittle failure manner.

The invention relates to bearing lubricating grease comprising the following components of: (a) a compound thickening agent formed by lithium 12-hydroxystearate soap, lithium binary acid soap and lithium borate, (b) an additive, and (c) base oil, wherein the compound thickening agent is formed by soapnifying 12-hydroxystearic acid, binary acid and boric acid with lithium hydroxide; and the additive amount of the boric acid is 1-5 parts by weight while the weight of the base oil is 100 parts by weight, wherein the additive is one or combination of at least two of an antioxidant, an antirusting agent, an anti-wear reagent at extreme pressure and a metal passivator. The dropping point temperature of the bearing lubricating grease provided by the invention is more than or equal to 300 DEG C, and the bearing lubricating grease provided by the invention does not collapse or fade and has the characteristics of long service life, silence and high temperature resistance.

The invention relates to a process for preparing biodegradable spherical porous starch foam and a biodegradable spherical porous starch foam administration system for an insoluble medicament. The process adopts an emulsifying-freeze thawing combined solvent displacement method, and comprises the following steps of: performing high-speed stirring or homogenizing treatment (emulsion homogenizing machine) on starch-melted aqueous solution with certain concentration serving as a water phase, methylbenzene / chloroform mixed solution (or other emulsion oil phase) serving as an oil phase and Span80 (or other W / O emulsifying agent) serving as an emulsifying agent to form uniform W / O emulsion, standing the emulsion for certain time at the temperature of 20 DEG C below zero, demixing the emulsion by gelling, dehydrating the layers in turn by adopting balance of aqueous solution of methanol with different concentrations, separating and removing the methylbenzene / chloroform layer by adopting a separating funnel, balancing the solution by using anhydrous ethanol, filtering the solution, and drying the filtrate with vacuum to obtain the biodegradable spherical porous starch foam. The foam material suitable to be used as an insoluble medicament carrier increases the specific surface area and water solubility of the insoluble medicament, and finally improves the bioavailability of the insoluble medicament.

The invention relates to an anti-collapse tundish smearing material and a preparation method thereof, and belongs to the technical field of unshaped refractory material; the anti-collapse tundish smearing material is characterized by being prepared from the following raw materials by the weight percentage: 20-30% of high-iron sintered magnesia with the particle size of 3-1 mm, 18-25% of high-iron sintered magnesia with the particle size of 1-0.5 mm, 18-25% of high-iron sintered magnesia with the particle size of less than or equal to 0.5 mm, 0-35% of 200-mesh 92 sintered magnesia, 0-35% of 200-mesh fused magnesite, 0-1% of sodium tripolyphosphate, 0-1% of sodium pyrophosphate, 1-4% of Guangxi white clay, 0-2% of a silica micro-powder, 0.1-0.4% of ethylene glycol, 0.2-0.5% of canary dextrin, 0.01-0.05% of a metal aluminum powder, 1-2.2% of paper fibers, and 0-0.2% of explosion-proof fibers, wherein the total percentage of the raw materials is 100%. The smearing material has the advantages of excellent construction performance, good water retention, no cracks during curing, high low-temperature strength, no collapse and no cracking during quick baking, and good use performance.

The invention provides a preparation method of a silicon carbide ceramic heat-exchange tube and a product prepared by the method. The preparation method comprises the following steps: (1) uniformly mixing silicon carbide micro powder, carbon black and a water reducing agent, then adding a mixture consisting of water, a dispersing agent, a binder and a lubricant, and carrying out stirring; (2) carrying out pugging on the material obtained in the step (1) under a pressure of 1.0-1.5 MPa and a vacuum degree of -0.08 MPa to 0.1 MPa, repeating the process for 3-5 times until the water content is 15-30wt%; (3) carrying out aging on the material obtained in the step (2) and then carrying out forming treatment to obtain a heat-exchange tube biscuit; (4) raising the temperature of the heat-exchangetube biscuit treated by the step (3) to 60-80 DEG C, and carrying out heat preservation and drying; (5) uniformly spraying a sintering aid onto the surface of the heat-exchange tube biscuit treated by the step (4), carrying out heating to 600-1100 DEG C, then introducing protective gas, continuously carrying out heating to 1500-1700 DEG C, carrying out heat preservation, and then carrying out natural cooling to 25-200 DEG C. According to the invention, the sintering aids such as B4C, Y2O3 and the like are not required in the raw materials of the invention, so that the influence of free metalsilicon on the performance of silicon carbide ceramic is reduced, the strength of the biscuit is high, and the rate of finished products is improved.

A prefabricated box girder square steel pipe mandrel, comprising a mandrel main body, a plurality of support frames and a plurality of retractable reinforced support skeletons, the mandrel main body is a hollow octagonal prism surrounded by a plurality of square steel pipes, the A plurality of support frames and a plurality of retractable reinforced support frames are arranged at intervals along the length direction of the mandrel main body in the hollow of the mandrel body, and the support frames and the retractable reinforced support frames are intersected, and the support frames include connecting The upper reinforcing bar, the right upward inclined reinforcing bar, the right reinforcing bar, the right downward inclined reinforcing bar, the lower reinforcing bar, the left downward inclined reinforcing bar, the left reinforcing bar and the left upward inclined reinforcing bar are sequentially connected from head to tail of the mechanism. The mandrel is easy to assemble, install and disassemble, which reduces labor intensity, saves labor, reduces construction costs, and saves construction time. The main body of the mandrel is intersected with a support frame and a retractable reinforced support frame, which improves the overall rigidity and strength of the mandrel. Strength, thereby greatly reducing the phenomenon of cracks and damage on the surface of the mandrel.

The invention discloses a polystyrene color steel sandwich panel. The polystyrene color steel sandwich panel comprises a core board, wherein the core board is a polystyrene fireproof thermal insulation board; two color steel plates respectively bonded to both sides of the polystyrene fireproof thermal insulation board; two side plates and two sealing plates respectively bonded to the two long sides and the two short sides of the polystyrene fireproof thermal insulation board. A fireproof thermal insulation adhesive is used for fireproof coating modification of a polystyrene foam board, so thatthe fireproof thermal insulation adhesive penetrates the polystyrene foam board to prepare the polystyrene fireproof thermal insulation board. The polystyrene color steel sandwich panel prepared by using the polystyrene fireproof thermal insulation board has the advantages of high bending strength, high compressive strength, good endurance, good combustion performance and no collapse in a fire field.

The invention relates to the field of food processing, in particular to nougat and a preparation method thereof. The nougat is prepared from the following raw materials in parts by weight: 1.2 to 1.5parts of water, 0.5 to 0.9 part of gelatin, 0.3 to 0.6 part of egg white, 4 to 9 parts of white granulated sugar, 13 to 16 parts of syrup, 0.01 to 0.05 part of edible salt, 2 to 5 parts of cream, 3 to6 parts of milk powder, 0.01 to 0.03 part of vanillin and 10 to 15 parts of peanut kernel. The preparation method of the nougat provided by the invention concretely uses a water bath heating processand a program vacuum cooling process to realize the soft sticky and fine mouthfeel of the nougat; the product structure is complete; the storage time is long; the energy can be properly supplemented;the texture and the structure are relatively good.

The invention relates to the field of food processing, and concretely relates to a low-sugar nougat and a production method thereof. The low-sugar nougat comprises, by weight, 1.2-1.5 parts of water,0.5-0.9 part of gelatin, 0.3-0.6 part of egg white, 3-4 parts of erythritol, 5-6 parts of trehalose, 13-16 parts of syrup, 0.01-0.05 part of edible salt, 2-5 parts of cream, 3-6 parts of milk powder,0.01-0.03 part of vanillin and 10-15 parts of peanut kernels. Additionally, the addition of the trehalose and erythritol reduces the sugar content of the nougat, prevents the conversion of reducing sugar in the boiling process, and improves the stability and the fresh-keeping property of the product; and a water bath heating process and a programmed vacuum cooling process are adopted, so the nougat has the advantages of soft and fine taste, complete structure, long storage time, proper energy supplementation and good texture.

The invention relates to the field of equipment shock absorption, aims to solve the problem that existing equipment design mounting cannot meet the safety demand of reducing earthquake damage of equipment, and provides an equipment mounting structure, a compound shock isolating support and a rigidity adjusting method thereof. The rigidity adjustable compound shock isolating support comprises at least one shock isolating support and at least one slippage support. The shock isolating support is configured to be vertically supported and connected between a base and to-be-supported equipment. Theslippage support is configured to be vertically supported between the base and the to-be-supported equipment and to form a slippage pair in the horizontal direction between the base and the to-be-supported equipment. The shock isolating support and / or the slippage support is provided with a vertical rigidity adjusting hole for assembling a rigidity adjusting rod which provides extra vertical rigidity when the total vertical rigidity is insufficient. The equipment mounting structure provided by the invention has the beneficial effects that the vertical rigidity and the horizontal rigidity thereof can be adjusted conveniently to meet the demand of to-be-mounted equipment on the vertical rigidity and the horizontal rigidity, the shock resistance is improved, and the earthquake damage is reduced.

The invention provides a functional terrace dividing strip and a construction method thereof. The functional terrace dividing strip is prepared from 300-400 parts of cement, 60-80 parts of inorganic mineral reinforcing materials, 50-100 parts of coal ash microspheres, 400-550 parts of quartz sand, 3-6 parts of thickening agents, 1-2 parts of a water reducing agent, 1-2 parts of a defoaming agent,4-8 parts of an early strength agent, 3-5 parts of fibers, 0-15 parts of rubber powder, 1-2 parts of a retarders, and 0-3 parts of pigment. The dividing strip is based on dry-mixed mortar which is high in early strength, rapid in setting, high in bonding strength and good in plasticity; therefore, efficient and rapid construction is achieved in cooperation with a specific construction method, thedividing strip can be shoveled or retained, and shoveled waste can serve as filler of common mortar or concrete to be reused after being collected and crushed.

The invention discloses silica sol bonded corundum refractory mortar. The refractory mortar is prepared from corundum, green clay, quartz powder, yellow dextrin, carboxymethyl cellulose, alumina micro-powder, a water reducing agent and silica sol. The refractory mortar has high normal-temperature bonding strength and medium-high temperature bonding strength, is micro-expansive after being fired atthe high temperature of 1,500 DEG C, has high refractoriness under load and full mortar joints, emits no irritating odor in a using process and is harmless to the human body and equipment, paving seams are compact in a long-term high-temperature operating process of an industrial furnace and are not cracked, completeness and gas tightness of masonry are guaranteed, and the service life of the furnace is prolonged.

The invention relates to a novel spring mattress. The novel spring mattress comprises spring areas and an edge reinforcing layer, wherein the spring areas comprise a first spring area, a second spring area, a third spring area, a fourth area and a fifth spring area; springs adopted by the first spring area, the third spring area and the fifth spring area are soft springs; springs adopted by the second spring area and the fourth spring area are hard springs; the springs in the spring areas are arranged in a honeycomb shape; the edge reinforcing layer is arranged at the periphery of the spring areas and comprises a plurality of rows of hard springs; and the springs in the spring areas are of double-spring structures. The novel spring mattress has the advantages that the spring distribution conforms to the human skeleton mechanics, the spring arrangement is dense, the elasticity is good, the service life is long and the benefit for health of the human skeleton is achieved.

The invention relates to a ceramic filter for a continuous casting tundish and a method for preparing the same. The technical scheme is that 50-70wt% of calcium carbonate particles, 2-15wt% of corundum particles and 2-10wt% of magnesia-alumina spinel particles serve as aggregate; 1-5wt% of prefused dodecacalcium hepta-aluminate particles, 10-15wt% of fine monocalcium aluminate powder and 4-10wt% of fine calcium dialuminate powder and 4-6wt% of prefused fine dodecacalcium hepta-aluminate powder serve as substrates; and silicone resin that accounts for 2-7wt% of the sum of the aggregate and the substrates serves as a binding agent. The binding agent and the aggregate are mixed and ground evenly, and the substrates are added to be mixed and ground for 3-7 min to obtain a mixture; vibrating pressure forming is performed, demolding is performed, and the mixture undergoes heat preservation for 6-36 h at 180-320 DEG C to obtain the ceramic filter for the continuous casting tundish. The ceramic filter for the continuous casting tundish has the advantages of wide impurity-removing particle size range, high efficiency, insusceptibility to blockage, high strength, washing resistance and long service life.

The invention discloses a split combination type slag dam for a tundish as well as a preparation and use method of the slag dam. The split combination type slag dam is divided into an upper part and alower part, and the upper part has a height of 1 / 3 of a total height and is a slag line part and is prepared from a magnesium-aluminum-silicon material; and the lower part has a height of 2 / 3 of thetotal height and is a non-slag line part and is prepared from a magnesium-silicon material, wherein the magnesium-aluminum-silicon material comprises the following main components: 38-52% of MgO, 35-48% of Al2O3, and 6-27% of SiO2; and the magnesium-silicon material comprises the following main components: 82-92% of MgO and 8-18% of SiO2. The upper part and the lower part are respectively preparedduring preparation, and the upper part and the lower part are assembled into one during installation. The slag dam provided by the invention fully utilizes the advantages of the magnesium-aluminum-silicon material and the magnesium-silicon material, avoids a phenomenon of stress cracking of a same slag dam due to different materials, and has the advantages of low costs, convenient preparation, service life of more than 30 hours, no cracking and no collapse.

The invention discloses an easy cutting blade for a casting riser and a preparation method thereof, and relates to the technical field of casting production. The easy cutting blade is prepared by the following components in percentage by weight: 25% of asbestos, 15% of resins, 15% of kaolin, 10% of sinhalite, 20% of wear resistant particles and 15% of fillers; the resins include phenolic resins, butadiene rubber and high-temperature carbon fiber resins; and the wear resistant particles include 0.5-0.8 part of antimony by weight, 8-10 parts of graphite by weight and 3-5 parts of silicon disulfide by weight. The preparation method comprises the following steps: the weighed raw materials are added with water for fully mixing to form a slimy mixture; and the mixture is molded by pressing at a normal temperature, is molded by pressing at a high temperature of 600-700 DEG C, is fired in a ceramic manner at a high temperature of 800-1200 DEG C, is quenched for 7-10 minutes in quenching oil of 90-100 DEG C after cooling, and is tempered for 6-10 hours at a temperature of 300-350 DEG C. The easy cutting blade has such advantages as good heat stability, high strength, long service life, high refractoriness, no scattering and no deformation; and a riser connecting channel is complete in shape.

The invention particularly relates to high-temperature-resistant insulating paint, which consists of normal-temperature hardening insulating resin and diluting agents and is characterized in that each ingredient comprises the following recipe in percentage by weight: normal-temperature hardening insulating resin: 30 to 35 percent of vegetable oil, 0.8 to 2 percent of vinylbenzene and 64 to 68 percent of benzoline; and diluting agents: 72 to 80 percent of benzoline, 15 to 22 percent of dimethylbenzene and 2 to 6 percent of acetic ester. The high-temperature-resistant insulating paint has the advantages that the high temperature-resistance and the insulating performance are good, in addition, the sagging phenomenon does not occur in the coating process, the prepared pattern layers have uniform color, the surface is flat and smooth and does not have needle holes and collapse, excellent physicochemical performance is realized, and the high-temperature-resistant insulating paint can be widely applied to various high-temperature-resistant insulating materials.

The invention particularly relates to high-temperature-resistant insulating paint, which consists of normal-temperature hardening insulating resin and diluting agents and is characterized in that each ingredient comprises the following recipe in percentage by weight: normal-temperature hardening insulating resin: 30 to 35 percent of vegetable oil, 0.8 to 2 percent of vinylbenzene and 64 to 68 percent of benzoline; and diluting agents: 72 to 80 percent of benzoline, 15 to 22 percent of dimethylbenzene and 2 to 6 percent of acetic ester. The high-temperature-resistant insulating paint has the advantages that the high temperature-resistance and the insulating performance are good, in addition, the sagging phenomenon does not occur in the coating process, the prepared pattern layers have uniform color, the surface is flat and smooth and does not have needle holes and collapse, excellent physicochemical performance is realized, and the high-temperature-resistant insulating paint can be widely applied to various high-temperature-resistant insulating materials.

The invention discloses an anti-seismic energy-saving interlocking building block which is of a new block type of a small concrete hollow building block and is characterized in that three interlocking schemes and three heat insulation schemes are provided and can be selected or combined for use. Concave interlocking key grooves are formed in upper and lower planes of a block body wall, so that mortar joint interlocking can be formed; a U-shaped groove is formed in a block body to serve as a hidden beam die cavity, so that core-penetrating beam interlocking can be formed; a groove opening is formed in the upper half part of a block body rib to form a transverse channel and a vertical hole so as to form a reinforced masonry which is filled with transverse and vertical steel concrete, can bear a load and does not need to be dismounted, so that each building block and steel concrete of a beam column, a foundation, a floor and a roof can form building interlocking; aluminum foils are oppositely adhered to the wall surfaces in a hole cavity unfilled with concrete, so that a sandwich insulation layer with an air interlayer can be formed; a positioning groove is formed in the upper half part of the air interlayer, a heat insulation plate is inserted into the groove for dividing the hole cavity, so that a plate insertion insulation effect is formed; an aluminum foil is adhered to the outer side surface of the block body, so that a fireproof seepage-proofing external heat insulation effect is formed. The anti-seismic energy-saving interlocking building block can meet different energy-saving requirements all over China, can further resist a violent earthquake without collapse, enables people to be warm in winter and cool in summer, and guarantees the safety of people.

The invention relates to a thin-wall soil retaining brick die, which is built by bricks and has a certain height, thickness and length, wherein horizontal mortar which is in the length direction of the brick die is arranged upwards along the bottom of the brick die at intervals of a certain height, and steel bars which are in the length direction of the thin-wall soil retaining brick die are arranged in the horizontal mortar; and a brick column which is in the height direction of the thin-wall soil retaining brick die is arranged upwards along the length direction of the thin-wall soil retaining brick die at intervals of a certain distance. The thin-wall soil retaining brick die can be used under complex geological conditions and is difficult to collapse or bulge and deform in the backfill process of earthwork to ensure the construction quality.

The invention belongs to the field of environmental protection, and particularly relates to a treatment method for heavy metal contaminated soil. The treatment method provided by the invention comprises the following steps: a) mixing heavy metal contaminated soil with a plant leaching solution, and granulating to obtain microspheres, wherein the plant leaching solution contains carboxyl, hydroxyland polycyclic hydrocarbon; b) stacking the microspheres to obtain a microsphere stack; and c) leaching the microsphere stack to obtain the treated soil. The treatment method provided by the inventionfills the technical blank that the current high-fine-grain-content soil is difficult to leach and treat, and the treatment of the heavy metal contaminated soil can be realized only by simple granulation, heaping and spraying. According to the method, high-end crushing, screening and solid-liquid separation equipment does not need to be used, solidification / stabilization treatment and backfillingof soil fine particles do not need to be considered, investment and operation cost are greatly reduced, and the method has wide market popularization prospects and good environmental benefits and economic benefits.

The invention concerns a drum spring shaft, which comprises a vertical shaft(2), a bearing(3), a bearing pedestal(4), a spring(5), a fixation frame(1) and a drum(6), and a speed regulating device forregulating the rotation speed of the drum and a control device connected with the speed regulating device. The inventions also relates to a soft self fire fighting smoke block drop drape(roller drape). It comprises said roller spring shaft, fire fighting smoke block drape surface(24), a weight balanced bottom girder(11), a smoke block unit, guiding rails(13), door heads(18) and decoration cover(25). The fire proof smoke block drop drape(roller drape) is light, flexible and reliable, having low cost and favorable fire resisting property, being convenient for construction natural ventilation, light penetration, having no barrier for free passage of the article and personnel circulation in fire disaster.

The invention relates to a spiral rope-shaped artificial aquatic plant. The spiral rope-shaped artificial aquatic plant comprises a central rope and a plurality of rope-shaped artificial aquatic plants capable of being shaped, the rope-shaped artificial aquatic plants capable of being shaped are stacked around the central rope in a spiral mode, and the two ends of each rope-shaped artificial aquatic plant capable of being shaped are connected with the central rope. The cylindrical shape surrounding the central rope is changed into the spiral shape surrounding the central rope, so that a certain blank area is reserved on each layer of the central rope, sufficient space is provided for the growth and propagation of microorganisms, and meanwhile, materials are saved.

The invention discloses a waterborne repair material for a wood surface. The waterborne repair material is prepared from, by weight, 50% or more of polymer emulsion, 35-45% of quartz sand filler, 2-8%of film forming additive, less than 10% of deionized water, 0.1-0.5% of foam inhibitor and defoaming agent, 0.1-1% of dispersing agent, 0.1-1% of thickening agent, 0-0.1% of preservative and 0-0.1% of pH adjusting agent. The waterborne repair material for the wood surface has the advantages of being free of collapse, free of falling off, free of cracking, high in drying speed, easy to polish, easy to color and not prone to yellowing; odor is small, and body health of operators is protected; and according to detection of the SGS laboratory and other third-party authorities, the product contains no phthalate or harmful heavy metal or organic volatile matter, and passes the European Union REACH regulation 144 high concern material screening test.

The invention discloses a method for promoting siltation and sand consolidation on a beach by utilizing natural energy, and belongs to a coastal reclamation technology in coastal engineering. The method comprises the following steps: investigation, geological survey, design planning, damming and sluice-building, siltation promotion and water drainage, and mud conveying and sand consolidation. The method is characterized in that sediment deposition is promoted by utilizing natural energy of tides according to the principle of adjusting measures to local conditions and making the best use of the circumstances. Clearance electric energy of a plurality of pieces of power generating equipment is collected to establish a natural energy power station for supplying power to sediment conveying equipment. Sand consolidation is carried out by adopting methods of filling geotextile bags, mixing with a dehydrating hardening agent and biologically hardening. The method has the characteristics of adopting a multi-point formation process, being gradually expanded, being green and low-carbon, being energy-saving and environmentally-friendly, and being remarkable in benefit. Moreover, materials are saved, energy consumption is reduced and labor power is saved, so that the method is green and environmentally-friendly, and is safe and reliable. The method is used for dissipating waves, promoting siltation, consolidating sand and protecting a slope, so that irregular accumulation of sediments is improved, beach elevation is improved, a large number of land resources are obtained, and ecological balance is kept.

A granulating technology suitable for biologic extraction of metal includes mixing the powdered ore of metallic sulfide with adhesive, granulating by 5-25 mm for granularity, and natural drying by covering with air-permeable object. Its advantages are enough strength and high penetrability of their stack.

The invention discloses a balloon catheter comprising a main body and a catheter. The catheter comprises an inner tube and an outer tube. An inner balloon and an outer balloon are arranged at one end of the outer tube. A plurality of temperature sensing elements are uniformly distributed on the inner wall of the inner balloon. A plurality of mapping flexible electrodes are uniformly distributed on the outer wall of the outer balloon. An inner balloon pressure sensor and an inter-outer balloon pressure sensor are arranged in the main body. Pressure in the inner balloon is adjusted in real time by detection data from the inner balloon pressure sensor. Pressure in the space between the inner balloon and the outer balloon is monitored in real time through detection data from the inner balloon pressure sensor and the outer balloon pressure sensor. According to the balloon catheter, the mapping function and the freezing function are integrated in the same catheter, thereby saving operation time, and achieving accurate and real-time detection of temperature at an ablation part of the human body. The balloon catheter has higher safety performance, and can monitor use condition of the inner balloon, thereby further improving practicability and safety of the catheter.

The invention discloses a synchronous lifting control method for a building outer frame. 1. A stroke switch is set on the rotating shaft of each electric hoist; 2. The on-off times of the stroke switch of each electric hoist are input into a microprocessor, and the Perform processing and calculation according to the program set in it, and the micro-processor sends a control signal to each electric hoist to control the start and close of each electric hoist; 3. The microprocessor automatically designates an electric hoist as the reference hoist, if a certain When the difference between the on-off times of the limit switch of an electric hoist and the on-off times of the limit switch of the reference hoist is greater than or less than the preset value in the micro-processing, the micro-processing will send a signal of closing or starting to the electric hoist ; 4. When the difference between the on-off times of the travel switch of the electric hoist exceeding the set ratio and the on-off times of the reference hoist is positive or negative, the micro-processing will send a start or close signal to the reference hoist. The method of the invention can control a plurality of electric hoists to operate synchronously during lifting, so that each component part of the scaffold can be raised synchronously.