57results about How to "Guaranteed expansion effect" patented technology

The invention discloses a high fluidization micro expansive high-strength grouting material which comprises the following raw materials by mass percentage: 23-34% of cement, 3-5% of microbead, 5-7.5% of phosphorus slag composite powder, 2.5-3.5% of silica fume, 2.5-3.5% of quartz powder, 46-55% of fine aggregate, 0.7-1% of water reducer, 0.01-0.03% of defoaming agent, 2.5-3.5% of expanding agent and 0.5-1% of early strength agent. The grouting material has the advantages of high strength in the early stage and later stage, good flowing property and adjustable expansiveness by taking the cement as a major binding material and employing the silica fume, the microbead and the phosphorus slag composite powder with different hydration activities together with a chemical additive matched with a binding material system and an aggregate system with reasonable gradation, and is particularly applicable to high precision equipment mounting, secondary grouting of an equipment foundation, bolt anchoring, crack repairing, duct grouting and the like.

The invention discloses an expansion type sealing ring, which comprises a sealing ring body, external threads, sealing lines, internal threads and a through hole, wherein the external threads are formed on the outer side of the sealing ring body; the sealing lines are formed at the two ends of the external threads; the sealing ring body is coaxially provided with the through hole in which the internal threads are formed. The expansion type sealing ring has the advantages of high reliability, compact structure, convenience in use and manufacturing, high sealing performance, high adaptability, long service life, high elasticity, low cost and the like, and meanwhile, has broad market prospect in the rubber sealing ring market.

The invention belongs to the technical field of a chemical reagent for oil production, and discloses a viscosity-increasable profile control agent and a preparation method thereof. The profile control agent is obtained through adding functional monomers, inorganic nanometer particles, main crosslinking agents and auxiliary crosslinking agents into an acrylamide monomer water solution, introducing nitrogen gas to remove dissolved oxygen and adding initiators under the water bath condition of 40 to 60 DEG C for polymerization; after the polymerization is completed, pelleting, drying and crushing are performed; a final product is obtained. The prepared profile control agent can realize the continuous viscosity increase on formation water to achieve a certain displacement effect; meanwhile, good anti-salt performance is realized; the water absorption swelling can be generated in the high-concentration salt brine; after the expansion, high intensity is still realized, so that the high seepage layer in an oil deposit can be effectively sealed and plugged; the profile control effect is achieved.

The invention discloses a novel clinical parturition assistance device for gynaecology and obstetrics. The device comprises a base, wherein the upper end of the base is fixedly provided with a telescopic rod, the upper end of the telescopic rod is fixedly provided with a supporting frame, the upper end of the supporting frame is fixedly provided with a tray, the upper surface of the tray is provided with a left side expander and a right side expander, the structure of the left side expander is the same as that of the right side expander, the left side expander comprises a mounting frame, the mounting frame is internally provided with a light rod, the light rod penetrates through a mounting hole at the side of the mounting frame, one end of the light rod is provided with a baffle, the otherend of the light rod is fixedly provided with an expansion hook, and the inner side of the expansion hook is fixedly provided with a pressure sensor. The novel clinical parturition assistance devicefor gynaecology and obstetrics can automatically adjust the expansionary force according to different stages of parturition, and avoid the problems of insufficient expansionary force and muscle tearing.

The present invention discloses a low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete based on internal curing, shrinkage compensating and toughening, wherein the low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete is prepared from the following raw materials: cement, fly ash, mine powder, an expander, an AN-ICA internal curing agent, crushed stone, river sand, polyacrylonitrile fibers, micro-scale modified degreasing cotton cellulose, a cement slurry microstructure regulation agent, water and an ultra-dispersed water-reducing and shrinkage-reducing superplastic admixture. According to the present invention, the initial slump is more than or equal to 230 mm, the expansion degree is more than or equal to 630 mm, the 28 d compressive strength is more than or equal to 70 MPa, the 28 d splitting tensile strength is more than or equal to 5.8 MPa, the toughness index I5 is more than or equal to 3.0, the 28 d self-shrinkage is less than 100*10<-6>, the 28 d dry shrinkage rate is less than 150*10<-6>, the carbonization grade achieves T-IV, the anti-cracking grade achieves L-V, the product has characteristics of excellent mechanical property, excellent cracking resistance and excellent durability, and the difficult problems of high cement and cementing material material consumption, large shrinkage and easy cracking of the bridge tower concrete at the current stage can be solved.

The invention discloses an air-permeable textile printing and dyeing process, which belongs to the technical field of textiles. The present invention can simplify the existing drying process and fill the surface of the woven fabric with air-permeable powder after preliminary infrared drying. , and then seal the color-fixing master plate on the airtight cover, and then apply a magnetic field to force the color-fixing master plate to squeeze the air-permeable powder into the pores of the woven fabric, thereby dissolving in the residual moisture in the woven fabric. After the chemical reaction of the air-permeable powder occurs A large amount of gas is released, and the gas penetrates and expands rapidly in the fabric. Since the water only provides the carrier of the chemical reaction and does not participate in the chemical reaction, the dye is not easy to migrate. The color master disk releases the color-fixing liquid for exchange, and the color-fixing liquid enters the fabric along the gas permeation track, and performs color-fixing treatment on the non-migrated dye fully and uniformly. Compared with the existing technology, it not only simplifies Eliminates the drying and color fixing process, and at the same time significantly improves the dyeing effect of the woven fabric.