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131results about How to "Reduce bulge" patented technology

Self-heat-setting type anti-freezing and anti-spalling valve

The invention discloses a self-heat-setting type anti-freezing and anti-spalling valve, and belongs to the field of valves. According to the self-heat-setting type anti-freezing and anti-spalling valve, a self-heat-setting sleeve is arranged, and after a self-breaking water bag is broken under the action of low temperature in winter, water in the self-breaking water bag is in contact with heat-setting particles through a water guide ball rod. On the one hand, firstly quick lime particles react with the water, so that heat is generated and uniformly gathered on the inner wall of the self-heat-setting sleeve through the action of a soaking net to heat the surface of the valve, then condensation of water passing through the interior of the valve due to low temperature is effectively avoided, meanwhile, the occurrence rate of spalling caused by cold and hot temperature difference is remarkably reduced, and the service life of the valve is effectively prolonged; and on the other hand, after the quick lime is reacted, cement powder in the quick lime leaks out and is hardened after being in contact with the water, so that the overall strength of the self-heat-setting sleeve is effectively improved, the protection effect of the self-heat-setting sleeve on the internal valve body is higher, the force generated on the valve during partial thermal expansion can be counteracted, and the probability that the self-heat-setting sleeve is cracked by expansion is further reduced.
Owner:高洋

Device for improving degree of security of foundation ditch construction and method thereof

The invention relates to a device for improving the degree of security of foundation ditch construction and a method thereof. The device comprises a lifting anchor rod, an inhaul cable and supporting equipment, wherein the lifting anchor rod is vertically plunged into a soil body at the periphery of a foundation ditch; the lower end of the inhaul cable is connected with the lifting anchor rod, and the upper end is fixed on the supporting equipment; and the supporting equipment exerts a vertically upward pull for the lifting anchor rod through the inhaul cable. For the device for improving the degree of security of foundation ditch construction, the lifting anchor rod is plunged into the soil body at the periphery of the foundation ditch, and the inhaul cable exerts the vertically upward pull for the lifting anchor rod so that the lifting anchor rod can exert the vertically upward pull for the soil body at the periphery of the foundation ditch, the soil body at the periphery of the foundation ditch can be prevented from sinking under the action of the gravity thereof, the probability of proruption of the soil body in the foundation ditch can be reduced, the horizontal thrust of the soil body outside the foundation ditch to the inside of the foundation ditch can be also reduced, and the degree of security of the foundation ditch can be generally improved.
Owner:张庆中

Supporting process of portal frame type anchor pipe soil nail spraying net and modified reinforcing cement mortar employed by same

The invention discloses a supporting process of portal frame type anchor pipe soil nail spraying net and a modified reinforcing cement mortar employed by the same, which can greatly change the compression resistance and the shearing resistance of soft cement soil. In the novel supporting process of the portal frame type anchor pipe soil nail spraying net, a vertical large-diameter anchor pipe soil nail is added on the basis of the existing supporting technique of the conventional soil nail spraying net, a new formula of a 'modified' curing admixture is adopted to perform cement mortar blowing, and when the cross section of a foundation pit has large changes, theoretical and experimental researches are performed on a failure mode and deformation characteristics of the cross section of the foundation pit. Simultaneously, the supporting process is combined with actual projects to prove that the new type foundation pit support form can be adopted to excavate a foundation pit with the depth of 4 to 6 meters in Wenzhou, so not only the technical problem that a conventional soil nail spraying net support cannot be adopted when the excavation depth of the foundation pit in an urban area of Wenzhou is more than 4 meters is solved, but also compared with other available supports, the supporting process is money-saving and time-saving, reduces risks, and has good economic and social benefits.
Owner:SANJIAN CONSTR ENG GROUP

Phosphorus-containing mixed iron powder for automobiles and preparation method thereof

The invention relates to phosphorus-containing mixed iron powder for automobiles. The phosphorus-containing mixed iron powder is prepared from the following chemical components in percentage by weight: 0.001 percent to 0.2 percent of C, 0 percent to 0.50 percent of Si, 0.1 percent to 1.0 percent of Mn, 0.1 percent to 1.0 percent of P, 0 percent to 0.050 percent of S and the balance of Fe and inevitable impurities, wherein the loose packed density is 3.10g/cm<3> to 3.20g/cm<3>, the compressibility under the pressure of 600MPa is more than 7.05g/cm<3>, and the flowability is 32.0s/50g to 33.8s/50g. The phosphorus-containing mixed iron powder is prepared by performing diffusion bonding on water atomized pure iron powder with high compressibility and ferrophosphorus powder; the water atomizedpure iron powder is used as basic powder, the ferrophosphorus powder is added into the water atomized pure iron powder according to requirements of the components, and then the ferrophosphorus powderand the water atomized pure iron powder are uniformly mixed and then are diffused through a reducing furnace so as to obtain powder containing ferrophosphorus powder; the powder containing ferrophosphorus powder is added into 0.1 percent by weight to 1.0 percent by weight of lubricant, and then mixing is carried out for 20 minutes to 40 minutes to obtain a finished product. The phosphorus-containing mixed iron powder disclosed by the invention has the advantages that the using of alloy auxiliary categories is less so that the using cost of alloys is reduced, segregation on alloy element components is not produced in transportation and mixing processes, the stability of dimensional tolerance can be maintained in a sintering process of the product, and an iron-based alloy product having a uniform microscopic structure is conveniently obtained.
Owner:ANGANG (ANSHAN) METALLURGY POWDER MATERIAL CO LTD
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